* * * READ ME * * *
                      * * * InfoScale 7.4.2 * * *
                         * * * Patch 4700 * * *
                         Patch Date: 2023-11-27


This document provides the following information:

   * PATCH NAME
   * OPERATING SYSTEMS SUPPORTED BY THE PATCH
   * PACKAGES AFFECTED BY THE PATCH
   * BASE PRODUCT VERSIONS FOR THE PATCH
   * SUMMARY OF INCIDENTS FIXED BY THE PATCH
   * DETAILS OF INCIDENTS FIXED BY THE PATCH
   * INSTALLATION PRE-REQUISITES
   * INSTALLING THE PATCH
   * REMOVING THE PATCH
   * KNOWN ISSUES


PATCH NAME
----------
InfoScale 7.4.2 Patch 4700


OPERATING SYSTEMS SUPPORTED BY THE PATCH
----------------------------------------
RHEL8 x86-64


PACKAGES AFFECTED BY THE PATCH
------------------------------
VRTSaslapm
VRTSodm
VRTSvxfs
VRTSvxvm


BASE PRODUCT VERSIONS FOR THE PATCH
-----------------------------------
   * InfoScale Enterprise 7.4.2
   * InfoScale Foundation 7.4.2
   * InfoScale Storage 7.4.2


SUMMARY OF INCIDENTS FIXED BY THE PATCH
---------------------------------------
Patch ID: VRTSvxfs-7.4.2.4600
* 4128876 (4104103) File system unmount operation is in hang state due to missing rele of vnode.
* 4134659 (4103045) Veritas File Replication failover(promote) might fail during disaster recovery or upgrade scenarios.
* 4134662 (4134661) Hang seen in the cp command in case of checkpoint promote in cluster filesystem environment.
* 4134665 (4130230) vx_prefault_uio_readable() function is going beyond intended boundaries of the uio->uio_iov structure, potentially causing it to access memory addresses that are not valid.
* 4135000 (4070819) Handling the case where the error is returned while we are going to get the inode from the last clone which is marked as overlay and is going to be removed.
* 4135005 (4068548) File system log replay fails with "inode marked bad, allocation flags (0x0001)"
* 4135008 (4126957) System crashes with VxFS stack.
* 4135017 (4119961) We hit the assert "xted_irwunlock:2" while doing in-house testing of WORM/Aulog features.
* 4135018 (4068201) File system corruption can happen in cases where node which committed the transaction crashed after sending the reply and before flushing to the log.
* 4135022 (4101075) During in-house CFS testing we hit the assert "vx_extfindbig:4" in extent look path.
* 4135027 (4084239) Machine hit with Panic because if assert "f:xted_irwunlock:2"
* 4135028 (4058153) FSCK hangs while clearing VX_EXHASH_CLASS attribute in 512 byte FS.
* 4135038 (4090088) Force unmounting might cause system crash, specifically when "panic_on_warn" is set.
* 4135040 (4092440) FSPPADM giving return code 0 (success) despite policy enforcement is failing.
* 4135042 (4068953) FSCK detected error on 512 byte node FS, in 1 fset ilist while verifying the FS after doing log replay and upgrading the FS to 17 DLV.
* 4135102 (4099740) UX:vxfs mount: ERROR: V-3-21264: <device> is already mounted, <mount-point> is busy,
                 or the allowable number of mount points has been exceeded.
* 4135105 (4112056) Hitting assert "f:vx_vnode_deinit:1" during in-house FS testing.
* 4136095 (4134194) vxfs/glm worker thread panic with kernel NULL pointer dereference
* 4136238 (4134884) Unable to deport Diskgroup. Volume or plex device is open or attached
Patch ID: VRTSvxfs-7.4.2.4500
* 4015834 (3988752) Use ldi_strategy() routine instead of bdev_strategy() for IO's in solaris.
* 4093193 (4090032) System might panic in vx_dev_strategy() while Sybase or Oracle configuration.
* 4093943 (4076185) VxODM goes into maintenance mode after reboot.
* 4106387 (4100021) Running setfacl followed by getfacl resulting in "No such device or address" error.
* 4116328 (4116329) While checking FS sanity with the help of "fsck -o full -n" command, we tried to correct the FS flag value (WORM/Softworm), but failed because -n (read-only) option was given.
* 4117341 (4117342) System might panic due to hard lock up detected on CPU
* 4119279 (4119281) Higher page-in requests on Solaris 11 SPARC.
* 4120516 (3943232) System panic in vx_unmount_cleanup_notify when unmounting file system.
* 4120526 (4089199) Dynamic reconfiguration operation for CPU takes a lot of time.
* 4120531 (4096561) Running FULLFSCK on the filesystem reports error regarding incorrect state file.
Patch ID: VRTSvxfs-7.4.2.4400
* 4113122 (4113121) VXFS support for RHEL 8.8.
* 4114018 (4067505) invalid VX_AF_OVERLAY aflags error in fsck
* 4114033 (4101634) Directory inode getting incorrect file-type error in fsck.
* 4114040 (4083056) Hang observed while punching the smaller hole over the bigger hole.
Patch ID: VRTSvxfs-7.4.2.4300
* 4114653 (4114652) VXFS support for RHEL 8.7 minor kernel 4.18.0-425.19.2.
Patch ID: VRTSvxfs-7.4.2.4100
* 4106329 (4107777) VxFS support for RHEL 8.7 minor kernel.
* 4106702 (4106701) A security vulnerability exists in the third-party component sqlite.
Patch ID: VRTSvxfs-7.4.2.3900
* 4105265 (4105266) VxFS module failed to load on RHEL8
Patch ID: VRTSvxfs-7.4.2.3800
* 4050870 (3987720) vxms test is having failures.
* 4071105 (4067393) Panic "UG: unable to handle kernel NULL pointer dereference at 00000000000009e0."
* 4074298 (4069116) fsck got stuck in pass1 inode validation.
* 4075873 (4075871) Utility to find possible pending stuck messages.
* 4075875 (4018783) Metasave collection and restore takes significant amount of time.
* 4084881 (4084542) Enhance fsadm defrag report to display if FS is badly fragmented.
* 4088078 (4087036) The fsck binary has been updated to fix a failure while running with the "-o metasave" option on a shared volume.
* 4090573 (4056648) Metasave collection can be executed on a mounted filesystem.
* 4090600 (4090598) Utility to detect culprit nodes while cfs hang is observed.
* 4090601 (4068143) fsck->misc is having failures.
* 4090617 (4070217) Command fsck might fail with 'cluster reservation failed for volume' message for a disabled cluster-mounted filesystem.
* 4090639 (4086084) VxFS mount operation causes system panic.
* 4091580 (4056420) VFR  Hardlink file is not getting replicated after modification in incremental sync.
* 4093306 (4090127) CFS hang in vx_searchau().
* 4101230 (4100926) VxFS module failed to load on RHEL8.7
Patch ID: VRTSvxfs-7.4.2.3600
* 4089394 (4089392) Security vulnerabilities exist in the OpenSSL third-party components used by VxFS.
Patch ID: VRTSvxfs-7.4.2.3500
* 4083948 (4070814) Security Vulnerability in VxFS third party component Zlib
Patch ID: VRTSvxfs-7.4.2.3400
* 4079532 (4079869) Security Vulnerability in VxFS third party components
Patch ID: VRTSvxfs-7.4.2.2600
* 4015834 (3988752) Use ldi_strategy() routine instead of bdev_strategy() for IO's in solaris.
* 4040612 (4033664) Multiple different issues occur with hardlink replication using VFR.
* 4040618 (4040617) Veritas file replicator is not performing as per the expectation.
* 4060549 (4047921) Replication job getting into hung state when pause/resume operations performed repeatedly.
* 4060566 (4052449) Cluster goes in an 'unresponsive' mode while invalidating pages due to duplicate page entries in iowr structure.
* 4060585 (4042925) Intermittent Performance issue on commands like df and ls.
* 4060805 (4042254) A new feature has been added in vxupgrade which fails disk-layout upgrade if sufficient space is not available in the filesystem.
* 4061203 (4005620) Internal counter of inodes from Inode Allocation Unit (IAU) can be negative if IAU is marked bad.
* 4061527 (4054386) If systemd service fails to load vxfs module, the service still shows status as active instead of failed.
Patch ID: VRTSvxfs-7.4.2.2300
* 4018174 (3941620) Memory starvation during heavy write activity.
* 4043042 (3990168) Accommodation of new interpretation of error from bio structure in linux kernel greater than 4.12.14
* 4052763 (4052883) VxFS support for RHEL 8.5.
Patch ID: VRTSvxfs-7.4.2.2200
* 4013420 (4013139) The abort operation on an ongoing online migration from the native file system to VxFS on RHEL 8.x systems.
* 4040238 (4035040) vfradmin stats command failed to show all the fields in the command output in-case job paused and resume.
* 4040608 (4008616) fsck command got hung.
* 4042686 (4042684) ODM resize fails for size 8192.
* 4044184 (3993140) Compclock was not giving accurate results.
* 4046265 (4037035) VxFS should have the ability to control the number of inactive processing threads.
* 4046266 (4043084) panic in vx_cbdnlc_lookup
* 4046267 (4034910) Asynchronous access/updatation of global list large_dirinfo  can corrupt its values in multi-threaded execution.
* 4046271 (3993822) fsck stops running on a file system
* 4046272 (4017104) Deleting a lot of files can cause resource starvation, causing panic or momentary hangs.
* 4046829 (3993943) The fsck utility hit the coredump due to segmentation fault in get_dotdotlst()
* 4047568 (4046169) On RHEL8, while doing a directory move from one FS (ext4 or vxfs) to migration VxFS, the migration can fail and FS will be disable.
* 4049091 (4035057) On RHEL8, IOs done on FS, while other FS to VxFS migration is in progress can cause panic.
* 4049097 (4049096) Dalloc change ctime in background while extent allocation
Patch ID: VRTSvxvm-7.4.2.4700
* 4134888 (4105204) Node not able to join the cluster after iLO "press and hold" scenario in loop
* 4134889 (4107401) Replication stopped after VVR logowner reboot
* 4136239 (4069940) FS mount failed during Cluster configuration on 24-node physical HP BOM2 setup.
* 4136316 (4098144) vxtask list shows the parent process without any sub-tasks which never progresses for SRL volume
* 4136482 (4132799) No detailed error messages while joining CVM fail.
* 4137008 (4133793) vxsnap restore failed with DCO IO errors during the operation when run in loop for multiple VxVM volumes.
* 4139447 (4139448) VxVM rpm Support on RHEL8.9 platform
Patch ID: VRTSaslapm 7.4.2.4700
* 4139450 (4139452) ASLAPM rpm support on RHEL8.9
* 4069525 (4065490) VxVM udev rules consumes more CPU and appears in "top" output when system has thousands of storage devices attached.
* 4116576 (3972344) vxrecover returns an error - 'ERROR V-5-1-11150'  Volume <vol_name> not found'
* 4128868 (4128867) Security vulnerabilities exists in third party component OpenSSL.
* 4128885 (4115193) Data corruption observed after the node fault and cluster restart in DR environment
* 4131718 (4088941) Panic observed at scsi_queue_rq in SLES15SP3.
* 4134702 (4122396) When using KillMode=control-group, stopping the vxvm-recover.service results in a failed state.
* 4135150 (4114867) systemd-udevd[2224]: invalid key/value pair in file /etc/udev/rules.d/41-VxVM-selinux.rules on line 20, starting at character 103 ('D')
Patch ID: VRTSvxvm-7.4.2.4500
* 4128868 (4128867) Security vulnerabilities exists in third party component OpenSSL.
Patch ID: VRTSvxvm-7.4.2.4400
* 4092002 (4081740) vxdg flush command slow due to too many luns needlessly access /proc/partitions.
* 4111010 (4108475) vxfentsthdw script failed with "Expect no writes for disks ... "
* 4113327 (4102439) Volume Manager Encryption EKM Key Rotation (vxencrypt rekey) Operation Fails on IS 7.4.2/rhel7
* 4115231 (4090772) vxconfigd/vx commands hung if fdisk opened secondary volume and secondary logowner panic'd
* 4116422 (4111254) vradmind dumps core while associating a rlink to rvg because of NULL pointer reference.
* 4116427 (4108913) Vradmind dumps core because of memory corruption.
* 4116435 (4034741) The current fix from limits IO load on secondary causing deadlock situtaion
* 4116437 (4072862) Stop cluster hang because of RVGLogowner and CVMClus resources fail to offline.
* 4116576 (3972344) vxrecover returns an error - 'ERROR V-5-1-11150'  Volume <vol_name> not found'
* 4117899 (4055159) vxdisk list showing incorrect value of LUN_SIZE for nvme disks
* 4117989 (4085145) EBSvol agent error in attach disk : RHEL 7.9 + Infoscale 8.0 on AWS instance type c6i.large with NVME devices.
* 4118256 (4028439) Updating mediatype tages through disk online event.
* 4119951 (4119950) Security vulnerabilities exists in third party components [curl and libxml].
* 4120540 (4102532) /etc/default/vxsf file gets world write permission when "vxtune storage_connectivity asymmetric" is run.
* 4120545 (4090826) system panic at vol_page_offsetlist_sort
* 4120547 (4093067) System panic occurs because of NULL pointer in block device structure.
* 4120720 (4086063) semodule policy is installed in %post stage during vxvm upgrade and then gets removed in %preun stage.
* 4120722 (4021816) semodule of upgraded VxVM package gets removed in %preun stage of install script during package upgrade.
* 4120724 (3995831) System hung: A large number of SIOs got queued in FMR.
* 4120728 (4090476) SRL is not draining to secondary.
* 4120769 (4014894) Disk attach is done one by one for each disk creating transactions for each disk
* 4120876 (4081434) VVR kernel panic dring process the ACK message at VVR Primary side.
* 4120899 (4116024) machine panic due to access illegal address.
* 4120903 (4100775) vxconfigd was hung as VxDMP doesn't support chained BIO on rhel7.
* 4120916 (4112687) DLE (Dynamic Lun Expansion) of single path GPT disk may corrupt disk public region.
* 4121075 (4100069) One of standard disk groups fails to auto-import with 'Disk for disk group not found' error when those disk groups co-exist with the cloned disk group.
* 4121081 (4098965) Crash at memset function due to invalid memory access.
* 4121083 (4105953) system panic due to VVR accessed a NULL pointer.
* 4121222 (4095718) some tasks kept waiting for IO drain and caused system IO hung.
* 4121243 (4101588) vxtune shows incorrect vol_rvio_maxpool_sz and some other tunables when they're over 4g.
* 4121254 (4115078) vxconfigd hung was observed when reboot all nodes of the primary site.
* 4121681 (3995731) vxconfigd dumping core due to NULL pointer.
* 4121763 (3995308) vxtask status hang due to incorrect values getting copied into task status information.
* 4121767 (4117568) vradmind dumps core due to invalid memory access.
* 4121875 (4090943) VVR Primary RLink cannot connect as secondary reports SRL log is full.
* 4123313 (4114927) Failed to mount /boot on dmp device after enabling dmp_native_support.
* 4124324 (4098582) Permission are changing to 644 of ddl.log after logrotation, customer need it to be 640 as per security compliance
* 4126041 (4124223) Core dump is generated for vxconfigd in TC execution.
* 4127473 (4089626) Create XFS on VxDMP devices hang as VxDMP doesn't support chained BIO.
* 4127475 (4114601) Panic: in dmp_process_errbp() for disk pull scenario.
Patch ID: VRTSaslapm 7.4.2.4400
* 4116214 (4117350) Import operation on disk group created on Hitachi ShadowImage (SI) disks is failing .
Patch ID: VRTSvxvm-7.4.2.4300
* 4119951 (4119950) Security vulnerabilities exists in third party components [curl and libxml].
Patch ID: VRTSaslapm 7.4.2.4300
* 4119951 (4119950) Security vulnerabilities exists in third party components [curl and libxml].
Patch ID: VRTSvxvm-7.4.2.4100
* 4116348 (4112433) Security vulnerabilities exists in third party components [openssl, curl and libxml].
Patch ID: VRTSaslapm 7.4.2.4100
* 4116348 (4112433) Security vulnerabilities exists in third party components [openssl, curl and libxml].
Patch ID: VRTSvxvm-7.4.2.3900
* 4110560 (4104927) Changing the attributes in vxvm-boot.service for SLES15 is causing regression in RHEL versions.
* 4113324 (4113323) VxVM Support on RHEL 8.8
* 4113661 (4091076) SRL gets into pass-thru mode because of head error.
* 4113663 (4095163) system panic due to a race freeing VVR update.
* 4113664 (4091390) vradmind service has dump core and stopped on few nodes
* 4113666 (4064772) After enabling slub debug, system could hang with IO load.
Patch ID: VRTSaslapm 7.4.2.3900
* 4116885 (4116868) ASLAPM rpm Support on RHEL 8.8
Patch ID: VRTSvxvm-7.4.2.3800
* 4110666 (4110665) A security vulnerability exists in the third-party component libcurl.
* 4110766 (4112033) A security vulnerability exists in the third-party component libxml2.
Patch ID: VRTSaslapm 7.4.2.3800
* 4110666 (4110665) A security vulnerability exists in the third-party component libcurl.
* 4110766 (4112033) A security vulnerability exists in the third-party component libxml2.
Patch ID: VRTSvxvm-7.4.2.3700
* 4105752 (4107924) VxVM rpm Support on RHEL 8.7 minor kernel 4.18.0-425.10.1.el8_7.x86_64
* 4106001 (4102501) A security vulnerability exists in the third-party component libcurl.
* 4107223 (4107802) Fix for calculating best-fit module for upcoming RHEL8.7 minor kernels (higher than 4.18.0-425.10.1.el8_7.x86_64).
Patch ID: VRTSaslapm 7.4.2.3700
* 4106001 (4102501) A security vulnerability exists in the third-party component libcurl.
* 4107931 (4107932) ASLAPM rpm Support on RHEL 8.7 minor kernel 4.18.0-425.10.1.el8_7.x86_64
Patch ID: VRTSvxvm-7.4.2.3600
* 4102424 (4103350) vxvm-encrypted.service going into failed state on secondary site on performing "vradmind -g <dg> -encrypted addsec <rvg> <prim_ip> <sec_ip>" command.
Patch ID: VRTSaslapm 7.4.2.3600
* 4076495 (4076320) AVID, reclaim_cmd_nv, extattr_nv, old_udid_nv are not generated for HPE 3PAR/Primera/Alletra 9000 ALUA array.
Patch ID: VRTSvxvm-7.4.2.3500
* 4012176 (3996206) Update Lun Serial Number for 3par disks
* 4013169 (4011691) High CPU consumption on the VVR secondary nodes because of high pending IO load.
* 4052119 (4045871) vxconfigd crashed at ddl_get_disk_given_path.
* 4086043 (4072241) vxdiskadm functionality is failing due to changes in dmpdr script
* 4090311 (4039690) Change the logger files size and do the gzip on logger files.
* 4090411 (4054685) In case of CVR environment, RVG recovery gets hung in linux platforms.
* 4090415 (4071345) Unplanned fallback synchronisation is unresponsive
* 4090442 (4078537) Connection to s3-fips bucket is failing
* 4090541 (4058166) Increase DCM log size based on volume size without exceeding region size limit of 4mb.
* 4090599 (4080897) Performance drop on raw VxVM volume in RHEL 8.x compared to RHEL7.X
* 4090604 (4044529) DMP is unable to display PWWN details for some LUNs by "vxdmpadm getportids".
* 4090932 (3996634) System boots slow since Linux lsblk command return within long time.
* 4090946 (4023297) Smartmove functionality was not being used after VVR Rlink was paused and resumed during VVR initial sync or DCM resync operation.
* 4090960 (4087770) NBFS: Data corruption due to skipped full-resync of detached mirrors of volume after DCO repair operation
* 4090970 (4017036) After enabling DMP (Dynamic Multipathing) Native support, enable /boot to be
mounted on DMP device when Linux is booting with systemd.
* 4091248 (4040808) df command hung in clustered environment
* 4091588 (3966157) SRL batching feature is broken
* 4091910 (4090321) Increase timeout for vxvm-boot systemd service
* 4091911 (4090192) Increase number of DDL threads for faster discovery
* 4091912 (4090234) Volume Manager Boot service is failing after reboot the system.
* 4091963 (4067191) In CVR environment after rebooting Slave node, Master node may panic
* 4091989 (4090930) [NBFS-3.1]: MASTER FS corruption is seen in loop reboot (-f) test
* 4092002 (4081740) vxdg flush command slow due to too many luns needlessly access /proc/partitions.
* 4092838 (4101128) VxVM rpm Support on RHEL 8.7 kernel
* 4099550 (4065145) multivolume and vset not able to overwrite encryption tags on secondary.
Patch ID: VRTSaslapm 7.4.2.3500
* 4094664 (4093396) Fail to recognize more than one EMC PowerStore arrays.
* 4101140 (4101139) ASLAPM rpm Support on RHEL 8.7 kernel
Patch ID: VRTSvxvm-7.4.2.3300
* 4083792 (4082799) A security vulnerability exists in the third-party component libcurl.
Patch ID: VRTSvxvm-7.4.2.3200
* 4011971 (3991668) In a Veritas Volume Replicator (VVR) configuration where secondary logging is enabled, data inconsistency is reported after the "No IBC message arrived" error is encountered.
* 4013169 (4011691) High CPU consumption on the VVR secondary nodes because of high pending IO load.
* 4037288 (4034857) VxVM support on SLES 15 SP2
* 4054311 (4040701) Some warnings are observed while installing vxvm package.
* 4056919 (4056917) Import of disk group in Flexible Storage Sharing (FSS) with missing disks can lead to data corruption.
* 4058873 (4057526) Adding check for init while accessing /var/lock/subsys/ path in vxnm-vxnetd.sh script.
* 4060839 (3975667) Softlock in vol_ioship_sender kernel thread
* 4060962 (3915202) Reporting repeated disk failures & DCPA events for other internal disks
* 4060966 (3959716) System may panic with sync replication with VVR configuration, when the RVG is in DCM mode.
* 4061004 (3993242) vxsnap prepare command when run on vset sometimes fails.
* 4061036 (4031064) Master switch operation is hung in VVR secondary environment.
* 4061055 (3999073) The file system corrupts when the cfsmount group goes into offline state.
* 4061057 (3931583) Node may panic while unloading the vxio module due to race condition.
* 4061298 (3982103) I/O hang is observed in VVR.
* 4061317 (3925277) DLE (Dynamic Lun Expansion) of single path GPT disk may corrupt disk public region.
* 4061509 (4043337) logging fixes for VVR
* 4062461 (4066785) create new option usereplicatedev=only to import the replicated LUN only.
* 4062577 (4062576) hastop -local never finishes on Rhel8.4 and RHEL8.5 servers with latest minor kernels due to hang in vxdg deport command.
* 4062746 (3992053) Data corruption may happen with layered volumes due to some data not re-synced while attaching a plex.
* 4062747 (3943707) vxconfigd reconfig hang when joing a cluster
* 4062751 (3989185) In a Veritas Volume Manager(VVR) environment vxrecover command can hang.
* 4062755 (3978453) Reconfig hang during master takeover
* 4063374 (4005121) Application IOPS drop in DCM mode with DCO-integrated DCM
* 4064523 (4049082) I/O read error is displayed when remote FSS node rebooting.
* 4066930 (3951527) Data loss on DR site seen while upgrading from Infoscale 7.3.1 or before to 7.4.x or later versions.
* 4067706 (4060462) Nidmap information is not cleared after a node leaves, resulting in add node failure subsequently.
* 4067710 (4064208) Node failed to join the existing cluster after bits are upgraded to a newer version.
* 4067712 (3868140) VVR primary site node might panic if the rlink disconnects while some data is getting replicated to secondary.
* 4067713 (3997531) Fail to start the VVR replication as vxnetd threads are not running
* 4067715 (4008740) Access to freed memory
* 4067717 (4009151) Auto-import of diskgroup on system reboot fails with error 'Disk for diskgroup not found'.
* 4067914 (4037757) Add a tunable to control auto start VVR services on boot up.
* 4067915 (4059134) Resync takes too long on raid-5 volume
* 4069522 (4043276) vxattachd is onlining previously offlined disks.
* 4069523 (4056751) Import read only cloned disk corrupts private region
* 4069524 (4056954) Vradmin addsec failures when encryption is enabled over wire
* 4070099 (3159650) Implemented vol_vvr_use_nat tunable support for vxtune.
* 4070253 (3911930) Provide a way to clear the PGR_FLAG_NOTSUPPORTED flag on the device instead of using exclude and include commands.
* 4071131 (4071605) A security vulnerability exists in the third-party component libxml2.
* 4072874 (4046786) FS becomes NOT MOUNTED after powerloss/poweron on all nodes.
Patch ID: VRTSaslapm 7.4.2.3200
* 4070186 (4041822) In an SRDF/Metro array setup, the last path is in the enabled state even after all the host and the array-side switch ports are disabled.
Patch ID: VRTSvxvm-7.4.2.2400
* 4018181 (3995474) VxVM sub-disks IO error occurs unexpectedly on SLES12SP3.
* 4051701 (4031597) vradmind generates a core dump in __strncpy_sse2_unaligned.
* 4051702 (4019182) In case of a VxDMP configuration, an InfoScale server panics when applying a patch.
* 4051705 (4049371) DMP unable to display all WWN details when running "vxdmpadm getctlr all".
* 4051706 (4046007) disk private region gets corrupted after cluster name change in FSS environment.
* 4053228 (4053230) VxVM support for RHEL 8.5
* 4055211 (4052191) Unexcepted scripts or commands got launched from vxvm-configure script because of incorrect comments format.
Patch ID: VRTSaslapm 7.4.2.2400
* 4053232 (4053233) ASL-APM support for RHEL 8.5
Patch ID: VRTSvxvm-7.4.2.2200
* 4018173 (3852146) Shared DiskGroup(DG) fails to import when "-c" and "-o noreonline" options 
are
specified together
* 4018178 (3906534) After enabling DMP (Dynamic Multipathing) Native support, enable /boot to be
mounted on DMP device.
* 4031342 (4031452) vxesd core dump in esd_write_fc()
* 4037283 (4021301) Data corruption issue observed in VxVM on RHEL8.
* 4042038 (4040897) Add support for HPE MSA 2060 arrays in the current ASL.
* 4046906 (3956607) vxdisk reclaim dumps core.
* 4046907 (4041001) In VxVM, system is getting hung when some nodes are rebooted.
* 4046908 (4038865) System panick at vxdmp module in IRQ stack.
* 4047588 (4044072) I/Os fail for NVMe disks with 4K block size on the RHEL 8.4 kernel.
* 4047590 (4045501) The VRTSvxvm and the VRTSaslapm packages fail to install on Centos 8.4 systems.
* 4047592 (3992040) bi_error - bi_status conversion map added for proper interpretation of errors at FS side.
* 4047695 (3911930) Provide a way to clear the PGR_FLAG_NOTSUPPORTED on the device instead of using
exclude/include commands
* 4047722 (4023390) Vxconfigd keeps dump core as invalid private region offset on a disk.
* 4049268 (4044583) A system goes into the maintenance mode when DMP is enabled to manage native devices.
Patch ID: VRTSaslapm 7.4.2.2200
* 4047510 (4042420) APM modules creation fails as vxvm-startup tries to make hardlink on different partition.
Patch ID: VRTSvxvm-7.4.2.1900
* 4020207 (4018086) system hang was observed when RVG was in DCM resync with SmartMove as ON.
* 4039510 (4037915) VxVM 7.4.1 support for RHEL 8.4 compilation errors
* 4039511 (4037914) BUG: unable to handle kernel NULL pointer dereference
* 4039512 (4017334) vxio stack trace warning message kmsg_mblk_to_msg can be seen in systemlog
* 4039517 (4012763) IO hang may happen in VVR (Veritas Volume Replicator) configuration when SRL overflows for one rlink while another one rlink is in AUTOSYNC mode.
Patch ID: VRTSaslapm 7.4.2.1900
* 4040765 (4040766) ASLAPM support for RHEL 8.4 on IS 7.4.2
Patch ID: VRTSvxvm-7.4.2.1500
* 4018182 (4008664) System panic when signal vxlogger daemon that has ended.
* 4020207 (4018086) system hang was observed when RVG was in DCM resync with SmartMove as ON.
* 4021238 (4008075) Observed with ASL changes for NVMe, This issue observed in reboot scenario. For every reboot machine was hitting panic And this was happening in loop.
* 4021240 (4010612) This issue observed for NVMe and ssd. where every disk has separate enclosure like nvme0, nvme1... so on. means every nvme/ssd disks names would be 
hostprefix_enclosurname0_disk0, hostprefix_enclosurname1_disk0....
* 4021346 (4010207) System panicked due to hard-lockup due to a spinlock not released properly during the vxstat collection.
* 4021359 (4010040) A security issue occurs during Volume Manager configuration.
* 4021366 (4008741) VxVM device files are not correctly labeled to prevent unauthorized modification - device_t
* 4021428 (4020166) Vxvm Support on RHEL8 Update3
* 4021748 (4020260) Failed to activate/set tunable dmp native support for Centos 8
Patch ID: VRTSaslapm 7.4.2.1500
* 4021235 (4010667) NVMe devices are not detected by Veritas Volume Manager(VxVM) on RHEL 8.
* 4021946 (4017905) Modifying current ASL to support VSPEx series array.
* 4022942 (4017656) Add support for XP8 arrays in the current ASL.
Patch ID: VRTSvxvm-7.4.2.1400
* 4018182 (4008664) System panic when signal vxlogger daemon that has ended.
* 4020207 (4018086) system hang was observed when RVG was in DCM resync with SmartMove as ON.
* 4021346 (4010207) System panicked due to hard-lockup due to a spinlock not released properly during the vxstat collection.
* 4021428 (4020166) Vxvm Support on RHEL8 Update3
* 4021748 (4020260) Failed to activate/set tunable dmp native support for Centos 8
Patch ID: VRTSvxvm-7.4.2.1300
* 4008606 (4004455) Instant restore failed for a snapshot created on older version DG.
* 4010892 (4009107) CA chain certificate verification fails in SSL context.
* 4011866 (3976678) vxvm-recover:  cat: write error: Broken pipe error encountered in syslog.
* 4011971 (3991668) Veritas Volume Replicator (VVR) configured with sec logging reports data inconsistency when hit "No IBC message arrived" error.
* 4012485 (4000387) VxVM support on RHEL 8.2
* 4012848 (4011394) Performance enhancement for cloud tiering.
* 4013155 (4010458) In VVR (Veritas Volume replicator), the rlink might inconsistently disconnect due to unexpected transactions.
* 4013169 (4011691) High CPU consumption on the VVR secondary nodes because of high pending IO load.
* 4013718 (4008942) Docker infoscale plugin is failing to unmount the filesystem, if the cache object is full
Patch ID: VRTSodm-7.4.2.4600
* 4137821 (4137822) After installing VRTSvxfs-7.4.2.4600 on RHEL platform, ODM(VRTSodm-7.4.2.4500) fails to start.
Patch ID: VRTSodm-7.4.2.4500
* 4127218 (4127217) VRTSodm driver will not load with VRTSvxfs patch.
Patch ID: VRTSodm-7.4.2.4400
* 4113120 (4113118) ODM support for RHEL 8.8.
Patch ID: VRTSodm-7.4.2.4300
* 4114657 (4114655) ODM support for RHEL 8.7 minor kernel 4.18.0-425.19.2.
Patch ID: VRTSodm-7.4.2.4100
* 4107667 (4107778) ODM support for RHEL 8.7 minor kernel.
Patch ID: VRTSodm-7.4.2.3900
* 4105305 (4105306) VRTSodm driver will not load with VRTSvxfs patch.
Patch ID: VRTSodm-7.4.2.3800
* 4093039 (4100922) ODM module failed to load on RHEL8.7
Patch ID: VRTSodm-7.4.2.3500
* 4087157 (4087155) VRTSodm driver will not load with VRTSvxfs patch.
Patch ID: VRTSodm-7.4.2.3400
* 4080777 (4080776) VRTSodm driver will not load with 7.4.1.3400 VRTSvxfs patch.
Patch ID: VRTSodm-7.4.2.2600
* 4057429 (4056673) Rebooting the system results into emergency mode due to corruption of module dependency files. Incorrect vxgms dependency in odm service file.
* 4060584 (3868609) High CPU usage by vxfs thread.
Patch ID: VRTSodm-7.4.2.2300
* 3930708 (3897161) Oracle Database on Veritas filesystem with Veritas ODM
library has high log file sync wait time.
* 4052766 (4052885) ODM support for RHEL 8.5.
Patch ID: VRTSodm-7.4.2.2200
* 4049440 (4049438) VRTSodm driver will not load with 7.4.2.2200 VRTSvxfs patch.


DETAILS OF INCIDENTS FIXED BY THE PATCH
---------------------------------------
This patch fixes the following incidents:

Patch ID: VRTSvxfs-7.4.2.4600

* 4128876 (Tracking ID: 4104103)

SYMPTOM:
File system unmount is hang

DESCRIPTION:
In case of error rele was missing on inode. Vnode count was leaked. Umount on the node was stuck waiting for the vnode count to become 1.

RESOLUTION:
Release the hold on vnode in case of error.

* 4134659 (Tracking ID: 4103045)

SYMPTOM:
Veritas File Replication failover(promote) might fail during disaster recovery or upgrade scenarios.

DESCRIPTION:
Veritas File Replication failover  is used to swap the role of source and target site during disaster recovery. As part of  failover, the filesystem is being unmounted and mounted again to update the state and other replication configurations. The failover might failed,  because the unmount(offline of filesystem) operation is not succesful. As offline of filesystem is not successful and after certain retries to offline the  filesystem as final step the process holding mount point  is being killed. So Failover is exited.

RESOLUTION:
The fix is to open the replication config file with O_CLOEXEC, which will ensure not to inherit the process on the filesystem from replication context.

* 4134662 (Tracking ID: 4134661)

SYMPTOM:
Hang seen in the cp command in case of checkpoint promote in cluster filesystem environment.

DESCRIPTION:
The Hang is seen in cp command as we are not able to pull the inode blocks which is marked as overlay, hence made the code changes to pull the inode blocks marked as overlay.

RESOLUTION:
The Hang is seen in cp command as we are not able to pull the inode blocks which is marked as overlay, hence made the code changes to pull the inode blocks marked as overlay.

* 4134665 (Tracking ID: 4130230)

SYMPTOM:
vx_prefault_uio_readable() function is going beyond intended boundaries of the uio->uio_iov structure, potentially causing it to access memory addresses that are not valid.

DESCRIPTION:
The maximum length we can pre-fault is fixed(8K). But, the amount of user IO in some situation is less than the fixed value that we pre-fault. This leads the code in vx_prefault_uio_readable() to run off the end of uio->uio_iov structure and access invalid memory address.

RESOLUTION:
To fix this we are introducing a check in the code which will stop the code from accessing invalid memory location, after it has processed (pre-faulted) all the requested user-space IO pages.

* 4135000 (Tracking ID: 4070819)

SYMPTOM:
Handling the case where the error is returned while we are going to get the inode from the last clone which is marked as overlay and is going to be removed.

DESCRIPTION:
We are going to get the inode which is marked as overlay from the last clone that is marked for deletion. Hence have made the code changes to handle the scenario where we can get the error while fetching the inode in this case.

RESOLUTION:
Have handled this scenario through code.

* 4135005 (Tracking ID: 4068548)

SYMPTOM:
Fullfsck set on the file system and message "WARNING: msgcnt 222 mesg 017: V-2-17: vx_nattr_dirremove_1 - <mntpt> file system inode <ino> marked 
bad incore" logged in dmesg

DESCRIPTION:
In case if file system is full, allocation fails with ENOSPC. enospc processing is done through inactive_process. If the file creation is done by non-root user and this thread itself starts doing the worklist processing it may fail with EACCES while processing IEREMOVE on files with root ownership.

RESOLUTION:
Set the root credentials while doing enospc processing and restore the old credentials after it is done.

* 4135008 (Tracking ID: 4126957)

SYMPTOM:
If "fsadm -o mntunlock=<string> <mountpoint>" and "umount -f <mountpoint>" operations are run in parallel,
system may crash with following stack:

 vx_aioctl_unsetmntlock+0xd3/0x2a0 [vxfs]
 vx_aioctl_vfs+0x256/0x2d0 [vxfs]
 vx_admin_ioctl+0x156/0x2f0 [vxfs]
 vxportalunlockedkioctl+0x529/0x660 [vxportal]
 do_vfs_ioctl+0xa4/0x690
 ksys_ioctl+0x64/0xa0
 __x64_sys_ioctl+0x16/0x20
 do_syscall_64+0x5b/0x1b0

DESCRIPTION:
There is a race condition between these two operations, due to which by the time fsadm thread tries to access
FS data structure, it is possible that umount operation has already freed the structures, which leads to panic.

RESOLUTION:
As a fix, the fsadm thread first checks if the umount operation is in progress. If so, it fails rather than continuing.

* 4135017 (Tracking ID: 4119961)

SYMPTOM:
Machine hit with Kernel PANIC, and generated the core dump.

DESCRIPTION:
During read we were trying to release the lock which was never taken.

RESOLUTION:
Fixed the issue with code changes.

* 4135018 (Tracking ID: 4068201)

SYMPTOM:
File system corruption

DESCRIPTION:
In certain cases we are not not flushing the intent log for transactions committed by a msg handler thread before replying to the msg.

RESOLUTION:
Flush the transactions done during ilist pull and push in case of error before sending the response.

* 4135022 (Tracking ID: 4101075)

SYMPTOM:
Will hit the core dump with debug bits, during finding big size extent.

DESCRIPTION:
During search of big extent (32K) with delegation, it is okay for smap to be NULL, if it is not NULL then unlock it.

RESOLUTION:
Relaxed the assert as it was unnecessarily complaining, also added the code to free the smap if it is not NULL.

* 4135027 (Tracking ID: 4084239)

SYMPTOM:
In case of OOM (Out of Memory) situation we might hit the issue if IOCTL fails to copy the data.

DESCRIPTION:
In case of error while copying the data (here it is OOM), we tried to release the lock which was never taken because of error.

RESOLUTION:
Fixed the bug with code changes.

* 4135028 (Tracking ID: 4058153)

SYMPTOM:
# mkfs.vxfs -o inosize=512 /dev/vx/dsk/testdg/testvol
# mount.vxfs /dev/vx/dsk/testdg/testvol /mnt1
# mkdir /mnt1/dir1
nxattrset -n ab -v 012345678901234567890123456789012345678901234567890123456789012345678901 /mnt1/dir1 >>>>>> creating 88 byte nxattr
# ./create_20k_file.sh             >>>>>>>>>>>> creating 20k files inside /mnt1/dir1/ to create LDH attribute.

Now if we remove LDH attain with some free inode, the fsck will go to invite loop.

DESCRIPTION:
We were doing calculation error while clearing the LDH attribute from inode.

RESOLUTION:
Fixed the bug with code changes, now FSCK will not hang and will clear the LDH attribute.

* 4135038 (Tracking ID: 4090088)

SYMPTOM:
while panic_on_warn is set, force umount might crash the server with following stacktrace: 

PID: 627188  TASK: ffff901777e89c00  CPU: 7   COMMAND: "vxumount"
 #0  machine_kexec at ffffffffb54653c8
 #1  __crash_kexec at ffffffffb55af0cd
 #2  panic at ffffffffb5e3359f
 #3  __warn.cold at ffffffffb5e337c4
 #4  report_bug at ffffffffb594501a
 #5  handle_bug at ffffffffb5e7be9c
 #6  exc_invalid_op at ffffffffb5e7c024
 #7  asm_exc_invalid_op at ffffffffb6000a62
    [exception RIP: blkdev_flush_mapping+252]
 #8  blkdev_put at ffffffffb58b41b0
 #9  vx_force_umount at ffffffffc1675e8f [vxfs]
#10  vx_aioctl_common at ffffffffc11dd80e [vxfs]
#11  vx_aioctl at ffffffffc11d57db [vxfs]
#12  vx_admin_ioctl at ffffffffc1550b2e [vxfs]
#13  vxportalunlockedkioctl at ffffffffc0a61399 [vxportal]
#14  __x64_sys_ioctl at ffffffffb578aca2
#15  do_syscall_64 at ffffffffb5e7bb2b

DESCRIPTION:
Mode is not properly setting with FMODE_EXCL flag.

RESOLUTION:
Code changes have been checked-in to properly set the flag value.

* 4135040 (Tracking ID: 4092440)

SYMPTOM:
# /opt/VRTS/bin/fsppadm enforce /mnt4
UX:vxfs fsppadm: ERROR: V-3-27988: Placement policy file does not exist for mount point /mnt4: No such file or directory
# echo $?
0

DESCRIPTION:
FSPPADM command was returning rc 0 even in case of error during policy enformentmet.

RESOLUTION:
Fixed the issue by code change.

* 4135042 (Tracking ID: 4068953)

SYMPTOM:
# /opt/VRTS/bin/fsck /dev/vx/rdsk/testdg/testvol
# mount.vxfs /dev/vx/dsk/testdg/testvol /testfsck
# vxupgrade -n 17 /testfsck
# umount /testfsck 
# /opt/VRTS/bin/fsck -o full -n /dev/vx/rdsk/testdg/testvol
pass0 - checking structural files
pass1 - checking inode sanity and blocks
pass2 - checking directory linkage
pass3 - checking reference counts
pass4 - checking resource maps
fileset 1 au 0 imap incorrect - fix (ynq)n                  >>>>>>> NOT EXPECTED
fileset 1 iau 0 summary incorrect - fix? (ynq)n       >>>>>>> NOT EXPECTED
OK to clear log? (ynq)n

DESCRIPTION:
In case of HOLE in ilist file we might hit the issue, because of incorrect calculation of available space.

RESOLUTION:
With the code changes, corrected the way we were calculating the space.

* 4135102 (Tracking ID: 4099740)

SYMPTOM:
While mounting a file system, it fails with EBUSY error. Although on the setup, same device can not be seen as "mounted".

DESCRIPTION:
During mounting a filesystem, if it encounters error in kernel space, it leaks a hold count of the block device. This falsely implies the block device is still open in any future mounts. Because of that, when user retries the mount, the mount fails with EBUSY. It also causes memory leak for the same reason.

RESOLUTION:
Code changes are done to release the hold count on the block device properly.

* 4135105 (Tracking ID: 4112056)

SYMPTOM:
Will have incorrect values in inode fields i_acl and i_default_acl that is 0, however expected value is ACL_NOT_CACHED (-1)

DESCRIPTION:
VxFS does not set get_acl() callback in inode_operations (i_op), hence whenever kernel (version 4.x and above) checks the presence of this callback and does not 
find, it sets i_acl and i_default_act fields to 0.

RESOLUTION:
Corrected the bug with code changes.

* 4136095 (Tracking ID: 4134194)

SYMPTOM:
vxfs/glm worker thread panic with kernel NULL pointer dereference

DESCRIPTION:
In vx_dir_realloc(), When the directory block is full, to fit new file entry it reallocate this directory block into a larger extent.
So as the new extent gets allocated, the old cbuf is now part of the new extent.
But we dont invalidate old cbuf during dir_realloc, which ends up with a staled cbuf in the cache.
This staled buffer can cause the buffer overflow issue.

RESOLUTION:
Code changes are done to invalidate the cbuf immediately after the realloc.

* 4136238 (Tracking ID: 4134884)

SYMPTOM:
After unmounting the FS, when the diskgroup deport is initiated, it gives below error: 
vxvm:vxconfigd: V-5-1-16251 Disk group deport of testdg failed with error 70 - Volume or plex device is open or attached

DESCRIPTION:
During mount of a dirty file system, vxvm device open count is leaked, and consequently, the deport of the vxvm DG got failed. 
During the VXFS FS mount operation the corresponding vxvm device will be opened.
If the FS is not clean, it signifies mount to do the log replay. Later the log replay completes, and the mount will succeed.
But this device open count leak causes the diskgroup deport to fail.

RESOLUTION:
Code changes are done to address the device open count leak.

Patch ID: VRTSvxfs-7.4.2.4500

* 4015834 (Tracking ID: 3988752)

SYMPTOM:
Use ldi_strategy() routine instead of bdev_strategy() for IO's in solaris.

DESCRIPTION:
bdev_strategy() is deprecated from solaris code and was causing performance issues when used for IO's. Solaris has recommended to use LDI framework for all IO's.

RESOLUTION:
Code is modified to use ldi framework for all IO's in solaris.

* 4093193 (Tracking ID: 4090032)

SYMPTOM:
System might panic in vx_dev_strategy() while Sybase or Oracle configuration, 
the panic stack looks like following:
vx_dev_strategy
vx_dio_physio
vx_dio_rdwri
vx_write_direct
vx_write1
vx_write_common_slow
vx_write_common
vx_write
fop_write
pwrite

DESCRIPTION:
When we are allocating a different buffer, vx_dev_strategy() unable to find the LDI handle.

RESOLUTION:
Code is modified to fix this issue.

* 4093943 (Tracking ID: 4076185)

SYMPTOM:
VxODM goes into maintenance mode after reboot, if Solaris local zones are configured.

DESCRIPTION:
Solaris changed their booting sequence in SOL11.4 SRU 42. When upgrading to SOL11.4 SRU 42 or greater, after reboot, VxODM in the global zone goes into maintenance mode if the Solaris local zones are configured on the system.

RESOLUTION:
Removed VCS dependency from VxODM and added zones service dependency on VxODM.

* 4106387 (Tracking ID: 4100021)

SYMPTOM:
Running setfacl followed by getfacl resulting in "No such device or address" error.

DESCRIPTION:
When running setfacl command on some of the directories which have the VX_ATTR_INDIRECT type of acl attribute, it is not removing the existing acl attribute and adding a new one, which should  not happen ideally. This is resulting in the failure of getfacl with following "No such device or address" error.

RESOLUTION:
we have done the code chages to removal of VX_ATTR_INDIRECT type acl in setfacl code.

* 4116328 (Tracking ID: 4116329)

SYMPTOM:
fsck -o full -n command will fail with error:
"ERROR: V-3-28446:  bc_write failure devid = 0, bno = 8, len = 1024"

DESCRIPTION:
Previously, to correct the file system WORM/SoftWORM, we didn't check  if user wanted to correct the pflags or just wanted to validate if value is flag is missing or not. Also fsck was not capable to handle SOFTWORM flag.

RESOLUTION:
Code added to not try to fix the the problem if user ran fsck with -n option. Also SOFTWORM scenario is added.

* 4117341 (Tracking ID: 4117342)

SYMPTOM:
System might panic due to hard lock up detected on CPU

DESCRIPTION:
When purging the dentries, there is a possible race which can 
lead to corrupted vnode flag. Because of these corrupted flag, 
vxfs tries to purge dentry again and it gets stuck for vnode lock 
which was taken in the current thread context which leads to 
deadlock/softlockup.

RESOLUTION:
Code is modified to protect vnode flag with vnode lock.

* 4119279 (Tracking ID: 4119281)

SYMPTOM:
Higher page-in requests on Solaris 11 SPARC.

DESCRIPTION:
After upgrading Infoscale, page-in requests are much higher. "vmstat" output looks normal but "sar" output looks abnormal (showing high page-in requests). 
"sar" is taking absolute sample for some reasons. "sar" is not supposed to use these values.

RESOLUTION:
Code changes are done to solve this issue

* 4120516 (Tracking ID: 3943232)

SYMPTOM:
System panic in vx_unmount_cleanup_notify when unmounting file system.

DESCRIPTION:
Every vnode having watches on it gets attached to root vnode of file system via vnode hook 
v_inotify_list during dentry purge. When user removes all watches from vnode, vnode is destroyed and 
VxFS free their associated memory. But it's possible that this vnode is still attached to root vnode list. 
during unmount, if Vxfs pick this vnode from root vnode list, then this could lead to null pointer deference 
when trying to access freed memory. To fix this issue, VxFS will now remove such vnodes from root vnode 
list.

RESOLUTION:
Code is modified to remove Vnode from root vnode list.

* 4120526 (Tracking ID: 4089199)

SYMPTOM:
Dynamic reconfiguration operation for CPU takes a lot of time. Temporary I/O hang is also observed during DR.

DESCRIPTION:
DR processing in VxFS is done for each CPU change notified by kernel. DR processing involves VxFS reinit and cluster-wide file system freeze.
If the processor has SMT enabled then the cluster-wide file system freeze happens for each SMT thread per virtual CPU. This causes the slowness and 
temporary I/O hangs during CPU DR operations.

RESOLUTION:
Optimised the DR code to do the processing of several CPU DR events together.

* 4120531 (Tracking ID: 4096561)

SYMPTOM:
Running FULLFSCK on the filesystem reports error regarding incorrect state file. 

au <au number> state file incorrect - fix? (ynq)

DESCRIPTION:
When we allocate a Zero Fill on Demand (ZFOD) extent larger than an AU then it is split into smaller sized chunks. After splitting, it requires to change the 
Allocation Unit (AU) state from ALLOCATED to EXPANDED. But this state change is missing in the code that leads to incorrect state file scenario.

RESOLUTION:
Code changes have been done to update Extent allocation unit state correctly.

Patch ID: VRTSvxfs-7.4.2.4400

* 4113122 (Tracking ID: 4113121)

SYMPTOM:
The VxFS module fails to load on RHEL8.8.

DESCRIPTION:
This issue occurs due to changes in the RHEL8.8.

RESOLUTION:
Updated VXFS to support RHEL 8.8.

* 4114018 (Tracking ID: 4067505)

SYMPTOM:
Fsck reports error invalid VX_AF_OVERLAY aflags

DESCRIPTION:
If the inode does not have push linkage (inode not allocated / inode and data already pushed), we skip pushing the data blocks when the inode is removed. Inode will have overlay data blocks, gen bumped up and IEREMOVE set. During extop processing size is set to 0 and bmap is cleared. This is a valid scenario.

Fsck while validating the inodes with overlay flag set, expects gen can be different only if the overlay inode has IEREMOVE set and it is last clone in the chain.

RESOLUTION:
If the push inode is not present allow gen to be different even if the clone is not last in chain.

* 4114033 (Tracking ID: 4101634)

SYMPTOM:
Fsck reports error directory block containing inode has incorrect file-type and directory contains invalid directory blocks.

DESCRIPTION:
While doing diretory sanity in fsck we skip updating new directory type ondisk in case of filetype error, hence fsck
reporting incorrect file-type error and directory contains invalid directory blocks .

RESOLUTION:
While doing diretory sanity in fsck updating new directory type ondisk in case of filetype error.

* 4114040 (Tracking ID: 4083056)

SYMPTOM:
Hang observed while punching the smaller hole over the bigger hole.

DESCRIPTION:
We observed the hang while punching the smaller hole over the bigger hole in the file due to the tight race
while processing the punching of the hole to the file and flushing it to the disk.

RESOLUTION:
Code changes checked in.

Patch ID: VRTSvxfs-7.4.2.4300

* 4114653 (Tracking ID: 4114652)

SYMPTOM:
The VxFS module fails to load on RHEL8.7 minor kernel 4.18.0-425.19.2.

DESCRIPTION:
This issue occurs due to changes in the RHEL8.7 minor kernel.

RESOLUTION:
Updated VXFS to support RHEL 8.7 minor kernel 4.18.0-425.19.2.

Patch ID: VRTSvxfs-7.4.2.4100

* 4106329 (Tracking ID: 4107777)

SYMPTOM:
The VxFS module fails to load on RHEL8.7 minor kernel.

DESCRIPTION:
This issue occurs due to changes in the RHEL8.7 minor kernel.

RESOLUTION:
Modified existing modinst-vxfs script to accommodate the changes in the kernel and load the correct module.

* 4106702 (Tracking ID: 4106701)

SYMPTOM:
A security vulnerability exists in the third-party component sqlite.

DESCRIPTION:
VXFS uses a third-party component named sqlitein which a security vulnerability exists.

RESOLUTION:
VxFS is updated to use a newer version of sqlitein which the security vulnerability has been addressed.

Patch ID: VRTSvxfs-7.4.2.3900

* 4105265 (Tracking ID: 4105266)

SYMPTOM:
VxFS module failed to load on RHEL8

DESCRIPTION:
Need recompilation of VxFS module

RESOLUTION:
Recompiled VxFS module

Patch ID: VRTSvxfs-7.4.2.3800

* 4050870 (Tracking ID: 3987720)

SYMPTOM:
vxms test is having failures.

DESCRIPTION:
vxms test is having failures.

RESOLUTION:
updated vxms.

* 4071105 (Tracking ID: 4067393)

SYMPTOM:
System panicked with the following stack trace:

page_fault 
[exception RIP: vx_ckptdir_nmspc_match+29]
vx_nmspc_resolve
vx_drevalidate 
lookup_dcache 
do_last 
path_openat 
do_filp_open 
do_sys_open 
sys_open

DESCRIPTION:
Negative path lookup on force unmounted file system was not handled, hence NULL pointer
de-reference due to accessing already freed fs struc of force unmounted fs.

RESOLUTION:
Handled cases for force umounted before vx_nmspc_resolve() call, so it can NULL pointer
de-reference.

* 4074298 (Tracking ID: 4069116)

SYMPTOM:
fsck got stuck in pass1 inode validation.

DESCRIPTION:
fsck could land into a infinite retry loop during inode validation with the following stack trace:

pthread_mutex_unlock()
bc_getfreebuf()
sl_getblk()
bc_rgetblk()
fs_getblk()
bmap_bread()
fs_bmap_typ()
fs_callback_bmap()
fsck_callback_bmap()
bmap_check_overlay()
ivalidate()
pass1()
iproc_do_work()
start_thread()

This is because the inode is completely corrupted in such a way that it matches a known inode type in ivalidate() and goes ahead to verify the inode bmap. While trying to do so it requests for a buffer size larger than maximum fsck buffer cache memory and hence gets stuck in a loop.

RESOLUTION:
Added code changes to skip bmap validation if the inode mode bits are corrupted

* 4075873 (Tracking ID: 4075871)

SYMPTOM:
Utility to find possible pending stuck messages.

DESCRIPTION:
Utility to find possible pending stuck messages.

RESOLUTION:
Added utility to find possible pending stuck messages.

* 4075875 (Tracking ID: 4018783)

SYMPTOM:
Metasave collection and restore takes significant amount of time.

DESCRIPTION:
Metasave collection and restore takes significant amount of time.

RESOLUTION:
Code changes have been done in metasave code base to improve metasave collection and metasave restore in the range of 30-40%.

* 4084881 (Tracking ID: 4084542)

SYMPTOM:
Enhance fsadm defrag report to display if FS is badly fragmented.

DESCRIPTION:
Enhance fsadm defrag report to display if FS is badly fragmented.

RESOLUTION:
Added method to identify if FS needs defragmentation.

* 4088078 (Tracking ID: 4087036)

SYMPTOM:
FSCK utility exits with an error while running it with the "-o metasave" option on a shared volume.

DESCRIPTION:
FSCK utility exits with an error while running it with the "-o metasave" option on a shared volume. Besides this, while running this utility with "-n" and either "-o metasave" or "-o dumplog", it silently ignores the latter option(s).

RESOLUTION:
Code changes have been done to resolve the above-mentioned failure and also warning messages have been added to inform users regarding mutually exclusive behavior of "-n" and either of "metasave" and "dumplog" options instead of silently ignoring them.

* 4090573 (Tracking ID: 4056648)

SYMPTOM:
Metasave collection can be executed on a mounted filesystem.

DESCRIPTION:
If metasave image is collected from a mounted filesystem then it might be an inconsistent state of the filesystem as there could be ongoing changes happening on the filesystem.

RESOLUTION:
Code changes have been done to fail default metasave collection for a mounted filesystem. If metasave needs to be collected from mounted filesystem then this can still be achieved with option "-o inconsistent".

* 4090600 (Tracking ID: 4090598)

SYMPTOM:
Utility to detect culprit nodes while cfs hang is observed.

DESCRIPTION:
Utility to detect culprit nodes while cfs hang is observed.Customer can reboot and collect crash from those nodes to get the application up and running. Integrated msgdump and glmdump utiltiy with cfshang_check.

RESOLUTION:
Integrated msgdump and glmdump utiltiy with cfshang_check.

* 4090601 (Tracking ID: 4068143)

SYMPTOM:
fsck->misc is having failures.

DESCRIPTION:
fsck->misc is having failures.

RESOLUTION:
Updated fsck->misc.

* 4090617 (Tracking ID: 4070217)

SYMPTOM:
Command fsck might fail with 'cluster reservation failed for volume' message for a disabled cluster-mounted filesystem.

DESCRIPTION:
On a disabled cluster-mounted filesystem, release of cluster reservation might fail during unmount operation resulting in a  failure of command fsck with 'cluster reservation failed for volume' message.

RESOLUTION:
Code is modified to release cluster reservation in unmount operation properly even for cluster-mounted filesystem.

* 4090639 (Tracking ID: 4086084)

SYMPTOM:
VxFS mount operation causes system panic when -o context is used.

DESCRIPTION:
VxFS mount operation supports context option to override existing extended attributes, or to specify a different, default context for file systems that do not support extended attributes. System panic observed when -o context is used.

RESOLUTION:
Required code changes are added to avoid panic.

* 4091580 (Tracking ID: 4056420)

SYMPTOM:
VFR  Hardlink file is not getting replicated after modification in incremental sync.

DESCRIPTION:
VFR  Hardlink file is not getting replicated after modification in incremental sync.

RESOLUTION:
Updated code to address: VFR Hardlink file is not getting replicated after modification in incremental sync.

* 4093306 (Tracking ID: 4090127)

SYMPTOM:
CFS hang in vx_searchau().

DESCRIPTION:
As part of SMAP transaction changes, allocator changed its logic to call mdele tryhold always when getting the emap for a particular EAU, and it passes 
nogetdele as 1 to mdele_tryhold, which suggests that mdele_tryhold should not ask for delegation when detecting a free EAU without delegation, so in our case, 
allocator finds such an EAU in device summary tree but without delegation,  and it keeps retrying but without asking for delegation, hence the forever.

RESOLUTION:
In case a FREE EAU is found without delegation, delegate it back to Primary.

* 4101230 (Tracking ID: 4100926)

SYMPTOM:
VxFS module failed to load on RHEL8.7

DESCRIPTION:
The RHEL8.7 is new release and it has some changes in kernel which caused VxFS module failed to load
on it.

RESOLUTION:
Added code to support VxFS on RHEL8.7.

Patch ID: VRTSvxfs-7.4.2.3600

* 4089394 (Tracking ID: 4089392)

SYMPTOM:
Security vulnerabilities exist in the OpenSSL third-party components used by VxFS.

DESCRIPTION:
VxFS uses the OpenSSL third-party components in which some security vulnerability exist.

RESOLUTION:
VxFS is updated to use newer version (1.1.1q) of this third-party components in which the security vulnerabilities have been addressed.

Patch ID: VRTSvxfs-7.4.2.3500

* 4083948 (Tracking ID: 4070814)

SYMPTOM:
Security Vulnerability found in VxFS while running security scans.

DESCRIPTION:
In our internal security scans we found some Vulnerabilities in VxFS third party component Zlib.

RESOLUTION:
Upgrading the third party component Zlib to resolve these vulnerabilities.

Patch ID: VRTSvxfs-7.4.2.3400

* 4079532 (Tracking ID: 4079869)

SYMPTOM:
Security Vulnerability found in VxFS while running security scans.

DESCRIPTION:
In our internal security scans we found some Vulnerabilities in VxFS third party components. The Attackers can exploit these security vulnerability 
to attack on system.

RESOLUTION:
Upgrading the third party components to resolve these vulnerabilities.

Patch ID: VRTSvxfs-7.4.2.2600

* 4015834 (Tracking ID: 3988752)

SYMPTOM:
Use ldi_strategy() routine instead of bdev_strategy() for IO's in solaris.

DESCRIPTION:
bdev_strategy() is deprecated from solaris code and was causing performance issues when used for IO's. Solaris has recommended to use LDI framework for all IO's.

RESOLUTION:
Code is modified to use ldi framework for all IO's in solaris.

* 4040612 (Tracking ID: 4033664)

SYMPTOM:
Multiple issues occur with hardlink replication using VFR.

DESCRIPTION:
Multiple different issues occur with hardlink replication using Veritas File Replicator (VFR).

RESOLUTION:
VFR is updated to fix issues with hardlink replication in the following cases:
1. Files with multiple links
2. Data inconsistency after hardlink file replication
3. Rename and move operations dumping core in multiple different scenarios
4. WORM feature support

* 4040618 (Tracking ID: 4040617)

SYMPTOM:
Veritas file replicator is not performing as per the expectation.

DESCRIPTION:
Veritas FIle replicator was having some bottlenecks at networking layer as well as data transfer level. This was causing additional throttling in the Replication.

RESOLUTION:
Performance optimisations done at multiple places to make use of available resources properly so that Veritas File replicator

* 4060549 (Tracking ID: 4047921)

SYMPTOM:
Replication job was getting into hung state because of the deadlock involving below threads :

Thread : 1  

#0  0x00007f160581854d in __lll_lock_wait () from /lib64/libpthread.so.0
#1  0x00007f1605813e9b in _L_lock_883 () from /lib64/libpthread.so.0
#2  0x00007f1605813d68 in pthread_mutex_lock () from /lib64/libpthread.so.0
#3  0x000000000043be1f in replnet_sess_bulk_free ()
#4  0x000000000043b1e3 in replnet_server_dropchan ()
#5  0x000000000043ca07 in replnet_client_connstate ()
#6  0x00000000004374e3 in replnet_conn_changestate ()
#7  0x0000000000437c18 in replnet_conn_evalpoll ()
#8  0x000000000044ac39 in vxev_loop ()
#9  0x0000000000405ab2 in main ()

Thread 2 :

#0  0x00007f1605815a35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x000000000043902b in replnet_msgq_waitempty ()
#2  0x0000000000439082 in replnet_bulk_recv_func ()
#3  0x00007f1605811ea5 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f1603ef29fd in clone () from /lib64/libc.so.6

DESCRIPTION:
When replication job is paused/resumed in a succession multiple times because of the race condition it may lead to a deadlock situation involving two threads.

RESOLUTION:
Fix the locking sequence and add additional holds on resources to avoid race leading to deadlock situation.

* 4060566 (Tracking ID: 4052449)

SYMPTOM:
Cluster goes in an 'unresponsive' mode while invalidating pages due to duplicate page entries in iowr structure.

DESCRIPTION:
While finding pages for invalidation of inodes, VxFS traverses radix tree by taking RCU lock and fills the IO structure with dirty/writeback pages that need to be invalidated in an array. This lock is efficient for read but does not protect the parallel creation/deletion of node. Hence, when VxFS finds page, consistency for the page in checked through radix_tree_exception()/radix_tree_deref_retry(). And if it fails, VxFS restarts the page finding from start offset. But VxFs does not reset the array index, leading to incorrect filling of IO structure's array which was causing  duplicate entries of pages. While trying to destroy these pages, VxFS takes page lock on each page. Because of duplicate entries, VxFS tries to take page lock couple of times on same page, leading to self-deadlock.

RESOLUTION:
Code is modified to reset the array index correctly in case of failure to find pages.

* 4060585 (Tracking ID: 4042925)

SYMPTOM:
Intermittent Performance issue on commands like df and ls.

DESCRIPTION:
Commands like "df" "ls" issue stat system call on node to calculate the statistics of the file system. In a CFS, when stat system call is issued, it compiles statistics from all nodes. When multiple df or ls are fired within specified time limit, vxfs is optimized. vxfs returns the cached statistics, instead of recalculating statistics from all nodes. If multiple such commands are fired in succession and one of the old caller of stat system call takes time, this optimization fails and VxFS recompiles statistics from all nodes. This can lead to bad performance of stat system call, leading to unresponsive situations for df, ls commands.

RESOLUTION:
Code is modified to protect last modified time of stat system call with a sleep lock.

* 4060805 (Tracking ID: 4042254)

SYMPTOM:
vxupgrade sets fullfsck flag in the filesystem if it is unable to upgrade the disk layout version because of ENOSPC.

DESCRIPTION:
If the filesystem is 100 % full and  its disk layout version is upgraded by using vxupgrade, then this utility starts the upgrade and later it fails with ENOSPC and ends up setting fullfsck flag in the filesystem.

RESOLUTION:
Code changes introduced which first calculate the required space to perform the disk layout upgrade. If the required space is not available, it fails the upgrade gracefully without setting fullfsck flag.

* 4061203 (Tracking ID: 4005620)

SYMPTOM:
Inode count maintained in the inode allocation unit (IAU) can be negative when an IAU is marked bad. An error such as the following is logged.

V-2-4: vx_mapbad - vx_inoauchk - /fs1 file system free inode bitmap in au 264 marked bad

Due to the negative inode count, errors like the following might be observed and processes might be stuck at inode allocation with a stack trace as shown.

V-2-14: vx_iget - inode table overflow

	vx_inoauchk 
	vx_inofindau 
	vx_findino 
	vx_ialloc 
	vx_dirmakeinode 
	vx_dircreate 
	vx_dircreate_tran 
	vx_pd_create 
	vx_create1_pd 
	vx_do_create 
	vx_create1 
	vx_create0 
	vx_create 
	vn_open 
	open

DESCRIPTION:
The inode count can be negative if somehow VxFS tries to allocate an inode from an IAU where the counter for regular file and directory inodes is zero. In such a situation, the inode allocation fails and the IAU map is marked bad. But the code tries to further reduce the already-zero counters, resulting in negative counts that can cause subsequent unresponsive situation.

RESOLUTION:
Code is modified to not reduce inode counters in vx_mapbad code path if the result is negative. A diagnostic message like the following flashes.
"vxfs: Error: Incorrect values of ias->ifree and Aus rifree detected."

* 4061527 (Tracking ID: 4054386)

SYMPTOM:
VxFS systemd service may show active status despite the module not being loaded.

DESCRIPTION:
If systemd service fails to load vxfs module, the service still shows status as active instead of failed.

RESOLUTION:
The script is modified to show the correct status in case of such failures.

Patch ID: VRTSvxfs-7.4.2.2300

* 4018174 (Tracking ID: 3941620)

SYMPTOM:
High memory usage is seen on Solaris system with delayed allocation enabled.

DESCRIPTION:
With VxFS delayed allocation enabled, in some unnecessary condition, it 
could 
make some put page operations return early before pages flushed and without 
retry later. Then only one vxfs working thread works on page flushing 
through 
delayed allocation flush path. This will result in the dirty page flushing 
much slow, and cause the memory starvation of the system.

RESOLUTION:
Code change has been done to make the page flushing work through multiple 
threads as normal.

* 4043042 (Tracking ID: 3990168)

SYMPTOM:
Accommodation of new interpretation of error from bio structure in linux kernel greater than 4.12.14

DESCRIPTION:
Interpretation of error from bio structure in linux kernel greater than 4.12 is changed. VxFS need to accommodate these changes to correctly interpret error from bio structure.

RESOLUTION:
Code added to accommodate new interpretation of error from bio structure in linux kernel greater than 4.12.14 for VxFS.

* 4052763 (Tracking ID: 4052883)

SYMPTOM:
The VxFS module fails to load on RHEL 8.5.

DESCRIPTION:
This issue occurs due to changes in the RHEL 8.5 kernel.

RESOLUTION:
VxFS module is updated to accommodate the changes in the kernel and load as expected on RHEL 8.5.

Patch ID: VRTSvxfs-7.4.2.2200

* 4013420 (Tracking ID: 4013139)

SYMPTOM:
The abort operation on an ongoing online migration from the native file system to VxFS on RHEL 8.x systems.

DESCRIPTION:
The following error messages are logged when the abort operation fails:
umount: /mnt1/lost+found/srcfs: not mounted
UX:vxfs fsmigadm: ERROR: V-3-26835:  umount of source device: /dev/vx/dsk/testdg/vol1 failed, with error: 32

RESOLUTION:
The fsmigadm utility is updated to address the issue with the abort operation on an ongoing online migration.

* 4040238 (Tracking ID: 4035040)

SYMPTOM:
After replication job paused and resumed some of the fields got missed in stats command output and never shows missing fields on onward runs.

DESCRIPTION:
rs_start for the current stat initialized to the start time of the replication and default value of rs_start is zero.
Stat don't show some fields in-case rc_start is zero.

        if (rs->rs_start && dis_type == VX_DIS_CURRENT) {
                if (!rs->rs_done) {
                        diff = rs->rs_update - rs->rs_start;
                }
                else {
                        diff = rs->rs_done - rs->rs_start;
                }

                /*
                 * The unit of time is in seconds, hence
                 * assigning 1 if the amount of data
                 * was too small
                 */

                diff = diff ? diff : 1;
                rate = rs->rs_file_bytes_synced /
                        (diff - rs->rs_paused_duration);
                printf("\t\tTransfer Rate: %s/sec\n", fmt_bytes(h, rate));
        }

In replication we initialize the rs_start to zero and update with the start time but we don't save the stats to disk. That small window leave a case where
in-case, we pause the replication and start again we always see the rs_start to zero.

Now after initializing the rs_start we write to disk in the same function. In-case in resume case we found rs_start to zero, we again initialize the rs_start 
field to current replication start time.

RESOLUTION:
Write rs_start to disk and added a check in resume case to initialize rs_start value in-case found 0.

* 4040608 (Tracking ID: 4008616)

SYMPTOM:
fsck command got hung.

DESCRIPTION:
fsck got stuck due to deadlock when a thread which marked buffer aliased is waiting for itself for the reference drain, while
getting block code was called with NOBLOCK flag.

RESOLUTION:
honour NOBLOCK flag

* 4042686 (Tracking ID: 4042684)

SYMPTOM:
Command fails to resize the file.

DESCRIPTION:
There is a window where a parallel thread can clear IDELXWRI flag which it should not.

RESOLUTION:
setting the delayed extending write flag incase any parallel thread has cleared it.

* 4044184 (Tracking ID: 3993140)

SYMPTOM:
In every 60 seconds, compclock was lagging behind approximate 1.44 seconds from actual time elapsed.

DESCRIPTION:
In every 60 seconds, compclock was lagging behind approximate 1.44 seconds from actual time elapsed.

RESOLUTION:
Made adjustment to logic responsible for calculating and updating compclock timer.

* 4046265 (Tracking ID: 4037035)

SYMPTOM:
VxFS should have the ability to control the number of inactive processing threads.

DESCRIPTION:
VxFS may spawn a large number of worker threads that become inactive over time. As a result, heavy lock contention occurs during the removal of inactive threads on high-end servers.

RESOLUTION:
To avoid the contention, a new tunable, vx_ninact_proc_threads, is added. You can use vx_ninact_proc_threads to adjust the number of inactive processing threads based on your server configuration and workload.

* 4046266 (Tracking ID: 4043084)

SYMPTOM:
panic in vx_cbdnlc_lookup

DESCRIPTION:
Panic observed in the following stack trace:
vx_cbdnlc_lookup+000140 ()
vx_int_lookup+0002C0 ()
vx_do_lookup2+000328 ()
vx_do_lookup+0000E0 ()
vx_lookup+0000A0 ()
vnop_lookup+0001D4 (??, ??, ??, ??, ??, ??)
getFullPath+00022C (??, ??, ??, ??)
getPathComponents+0003E8 (??, ??, ??, ??, ??, ??, ??)
svcNameCheck+0002EC (??, ??, ??, ??, ??, ??, ??)
kopen+000180 (??, ??, ??)
syscall+00024C ()

RESOLUTION:
Code changes to handle memory pressure while changing FC connectivity

* 4046267 (Tracking ID: 4034910)

SYMPTOM:
Garbage values inside global list large_dirinfo.

DESCRIPTION:
Garbage values inside global list large_dirinfo, which will lead to fsck failure.

RESOLUTION:
Make access/updataion to global list large_dirinfo synchronous throughout the fsck binary, so that garbage values due to race condition can be avoided.

* 4046271 (Tracking ID: 3993822)

SYMPTOM:
running fsck on a file system core dumps

DESCRIPTION:
buffer was marked as busy without taking buffer lock while getting buffer from freelist in 1 thread and there was another thread 
that was accessing this buffer through its local variable

RESOLUTION:
marking buffer busy within the buffer lock while getting free buffer.

* 4046272 (Tracking ID: 4017104)

SYMPTOM:
Deleting a huge number of inodes can consume a lot of system resources during inactivations which cause hangs or even panic.

DESCRIPTION:
Delicache inactivations dumps all the inodes in its inventory, all at once for inactivation. This causes a surge in the resource consumptions due to which other processes can starve.

RESOLUTION:
Gradually process the inode inactivation.

* 4046829 (Tracking ID: 3993943)

SYMPTOM:
The fsck utility hit the coredump due to segmentation fault in get_dotdotlst().

Below is stack trace of the issue.

get_dotdotlst 
check_dotdot_tbl 
iproc_do_work
start_thread 
clone ()

DESCRIPTION:
Due to a bug in fsck utility the coredump was generated while running the fsck on the filesystem. The fsck operation aborted in between due to the coredump.

RESOLUTION:
Code changes are done to fix this issue

* 4047568 (Tracking ID: 4046169)

SYMPTOM:
On RHEL8, while doing a directory move from one FS (ext4 or vxfs) to migration VxFS, the migration can fail and FS will be disable. In debug testing, the issue was caught by internal assert, with following stack trace.

panic
ted_call_demon
ted_assert
vx_msgprint
vx_mig_badfile
vx_mig_linux_removexattr_int
__vfs_removexattr
__vfs_removexattr_locked
vfs_removexattr
removexattr
path_removexattr
__x64_sys_removexattr
do_syscall_64

DESCRIPTION:
Due to different implementation of "mv" operation in RHEL8 (as compared to RHEL7), there is a removexattr call on the target FS - which in migration case will be migration VxFS. In this removexattr call, kernel asks "system.posix_acl_default" attribute to be removed from the directory to be moved. But since the directory is not present on the target side yet (and hence no extended attributes for the directory), the code returns ENODATA. When code in vx_mig_linux_removexattr_int() encounter this error, it disables the FS and in debug pkg calls assert.

RESOLUTION:
The fix is to ignore ENODATA error and not assert or disable the FS.

* 4049091 (Tracking ID: 4035057)

SYMPTOM:
On RHEL8, IOs done on FS, while other FS to VxFS migration is in progress can cause panic, with following stack trace.
 machine_kexec
 __crash_kexec
 crash_kexec
 oops_end
 no_context
 do_page_fault
 page_fault
 [exception RIP: memcpy+18]
 _copy_to_iter
 copy_page_to_iter
 generic_file_buffered_read
 new_sync_read
 vfs_read
 kernel_read
 vx_mig_read
 vfs_read
 ksys_read
 do_syscall_64

DESCRIPTION:
- As part of RHEL8 support changes, vfs_read, vfs_write calls were replaced with kernel_read, kernel_write as the vfs_ calls are no longer exported. The kernel_read, kernel_write calls internally set the memory segment of the thread to KERNEL_DS and expects the buffer passed to have been allocated in kernel space.
- In migration code, if the read/write operation cannot be completed using target FS (VxFS), then the IO is redirected to source FS. And in doing so, the code passes the same buffer - which is a user buffer to kernel call. This worked well with vfs_read, vfs_write calls. But is does not work with kernel_read, kernel_write calls, causing a panic.

RESOLUTION:
- Fix is to use vfs_iter_read, vfs_iter_write calls, which work with user buffer. To use these methods the user buffer needs to passed as part of struct iovec.iov_base

* 4049097 (Tracking ID: 4049096)

SYMPTOM:
Tar command errors out with 1 throwing warnings.

DESCRIPTION:
This is happening due to dalloc which is changing the ctime of the file after allocating the extents `(worklist thread)->vx_dalloc_flush -> vx_dalloc_off` in between the 2 fsstat calls in tar.

RESOLUTION:
Avoiding changing ctime while allocating delayed extents in background.

Patch ID: VRTSvxvm-7.4.2.4700

* 4134888 (Tracking ID: 4105204)

SYMPTOM:
Node not able to join the cluster after iLO "press and hold" scenario in loop

DESCRIPTION:
- Node is not able to join cluster because newly elected master and surviving slaves are stuck in previous reconfig
- This is one of Quorum loss/DG disable scenario
- During VCS cleanup of disabled DG,  dg deport is triggered which is stuck.
- Since dg is anyways disabled due to quorum loss, cluster reboot is needed to come out of situation.

- Following vxreconfd stack will be seen on new master and surviving slaves
PID: 8135   TASK: ffff9d3e32b05230  CPU: 5   COMMAND: "vxreconfd"
 #0 [ffff9d3e33c43748] __schedule at ffffffff8f1858da
 #1 [ffff9d3e33c437d0] schedule at ffffffff8f185d89
 #2 [ffff9d3e33c437e0] volsync_wait at ffffffffc349415f [vxio]
 #3 [ffff9d3e33c43848] _vol_syncwait at ffffffffc3939d44 [vxio]
 #4 [ffff9d3e33c43870] vol_rwsleep_rdlock_hipri at ffffffffc360e2ab [vxio]
 #5 [ffff9d3e33c43898] volopenter_hipri at ffffffffc361ae45 [vxio]
 #6 [ffff9d3e33c438a8] volcvm_ktrans_openter at ffffffffc33ba1e6 [vxio]
 #7 [ffff9d3e33c438c8] cvm_send_mlocks at ffffffffc33863f8 [vxio]
 #8 [ffff9d3e33c43910] volmvcvm_cluster_reconfig_exit at ffffffffc3407d1d [vxio]
 #9 [ffff9d3e33c43940] volcvm_master at ffffffffc33da1b8 [vxio]
#10 [ffff9d3e33c439c0] volcvm_vxreconfd_thread at ffffffffc33df481 [vxio]
#11 [ffff9d3e33c43ec8] kthread at ffffffff8eac6691
#12 [ffff9d3e33c43f50] ret_from_fork_nospec_begin at ffffffff8f192d24

RESOLUTION:
cluster reboot is needed to come out of situation

* 4134889 (Tracking ID: 4107401)

SYMPTOM:
SRL goes into passthru mode which causes system to run without replication

DESCRIPTION:
Issue is seen in FSS environment when new logowner selected after any reconfig is not contributing any storage. If SRL and data volume recovery use different plexes inconsistency is seen while reading SRL data.

RESOLUTION:
When SRL is recovered do read-write back so that all plexes are consistent.

* 4136239 (Tracking ID: 4069940)

SYMPTOM:
FS mount failed during Cluster configuration on 24-node physical BOM setup.

DESCRIPTION:
FS mount failed during Cluster configuration on 24-node physical BOM setup due to vxvm transactions were taking time more that vcs timeouts.

RESOLUTION:
Fix is added to reduce unnecessary transaction time on large node setup.

* 4136316 (Tracking ID: 4098144)

SYMPTOM:
vxtask list shows the parent process without any sub-tasks which never progresses for SRL volume

DESCRIPTION:
vxtask remains stuck since the parent process doesn't exit. It was seen that all childs are completed, but the parent is not able to exit.
(gdb) p active_jobs
$1 = 1
Active jobs are reduced as in when childs complete. Somehow one count is pending and we don't know which child exited without decrementing count. Instrumentation messages are added to capture the issue.

RESOLUTION:
Added a code that will create a log file in /etc/vx/log/. This file will be deleted when vxrecover exists successfully. The file will be present when vxtask parent hang issue is seen.

* 4136482 (Tracking ID: 4132799)

SYMPTOM:
If GLM is not loaded, start CVM fails with the following errors:
# vxclustadm -m gab startnode
VxVM vxclustadm INFO V-5-2-9687 vxclustadm: Fencing driver is in disabled mode - 
VxVM vxclustadm ERROR V-5-1-9743 errno 3

DESCRIPTION:
The error number but the error message is printed while joining CVM fails.

RESOLUTION:
The code changes have been made to fix the issue.

* 4137008 (Tracking ID: 4133793)

SYMPTOM:
DCO experience IO Errors while doing a vxsnap restore on vxvm volumes.

DESCRIPTION:
Dirty flag was getting set in context of an SIO with flag VOLSIO_AUXFLAG_NO_FWKLOG being set. This led to transaction errors while doing a vxsnap restore command in loop for vxvm volumes causing transaction abort. As a result, VxVM tries to cleanup by removing newly added BMs. Now, VxVM tries to access the deleted BMs. however it is not able to since they were deleted previously. This ultimately leads to DCO IO error.

RESOLUTION:
Skip first write klogging in the context of an IO with flag VOLSIO_AUXFLAG_NO_FWKLOG being set.

* 4139447 (Tracking ID: 4139448)

SYMPTOM:
VxVM rpm Support on RHEL8.9 platform

DESCRIPTION:
RHEL8.9 is a new platform and vxvm rpm should be compatible with the new os.

RESOLUTION:
VxVM rpm is supported on RHEL8.9

Patch ID: VRTSaslapm 7.4.2.4700

* 4139450 (Tracking ID: 4139452)

SYMPTOM:
ASLAPM rpm support on RHEL8.9

DESCRIPTION:
RHEL8.9 is a new platform and aslapm rpm should be compatible with the new os.

RESOLUTION:
ASLAPM rpm is supported on RHEL8.9

* 4069525 (Tracking ID: 4065490)

SYMPTOM:
systemd-udev threads consumes more CPU during system bootup or device discovery.

DESCRIPTION:
During disk discovery when new storage devices are discovered, VxVM udev rules are invoked for creating hardware path
symbolic link and setting SELinux security context on Veritas device files. For creating hardware path symbolic link to each
storage device, "find" command is used internally which is CPU intensive operation. If too many storage devices are attached to
system, then usage of "find" command causes high CPU consumption.

Also, for setting appropriate SELinux security context on VxVM device files, restorecon is done irrespective of SELinux is enabled or disabled.

RESOLUTION:
Usage of "find" command is replaced with "udevadm" command. SELinux security context on VxVM device files is being set
only when SELinux is enabled on system.

* 4116576 (Tracking ID: 3972344)

SYMPTOM:
After reboot of a node on a setup where multiple diskgroups / Volumes within diskgroups are present, sometimes in /var/log/messages an error 'vxrecover ERROR V-5-1-11150  Volume <volume_name> does not exist' is logged.

DESCRIPTION:
In volume_startable function (volrecover.c), dgsetup is called to set the current default diskgroup. This does not update the current_group variable leading to inappropriate mappings. Volumes are searched in an incorrect diskgroup which is logged in the error message.
The vxrecover command works fine if the diskgroup name associated with volume is specified. [vxrecover -g <dg_name> -s]

RESOLUTION:
Changed the code to use switch_diskgroup() instead of dgsetup. Current_group is updated and the current_dg is set. Thus vxrecover finds the Volume correctly.

* 4128868 (Tracking ID: 4128867)

SYMPTOM:
Vulnerabilities have been reported in third party component, OpenSSL that is used by VxVM.

DESCRIPTION:
Third party component OpenSSL in its current versions,  used by VxVM have been reported with security vulnerabilities which 
needs

RESOLUTION:
OpenSSL have been upgraded to newer versions in which the reported security vulnerabilities have been addressed.

* 4128885 (Tracking ID: 4115193)

SYMPTOM:
Data corruption on VVR primary with storage loss beyond fault tolerance level in replicated environment.

DESCRIPTION:
In Flexible Storage Sharing (FSS)  environment  any node fault can lead to storage failure. In VVR primary when last  mirror of SRL  (Storage Replicator Log) volume faulted while application writes are in progress replication is expected to go to pass-through mode.
This information is persistently recorded in the kernel log (KLOG). In the event of cascaded storage node failures, the KLOG updation protocol could not update quorum number of copies. This mis-match in on-disk v/s in-core state of VVR objects leading to data loss due to missing recovery when all storage faults are resolved.

RESOLUTION:
Code changes to handle the KLOG update failure in SRL IO failure handling is done to ensure configuration on-disk and in-core is consistent and subsequent application IO will not be allowed to avoid data corruption.

* 4131718 (Tracking ID: 4088941)

SYMPTOM:
While running DMP test suite , setup panics throwing below stack :
#7 [] scsi_queue_rq at [scsi_mod]
#8 [] blk_mq_dispatch_rq_list at 
#9 [] __blk_mq_sched_dispatch_requests at 
#10 [] blk_mq_sched_dispatch_requests at 
#11 [] __blk_mq_run_hw_queue at 
#12 [] __blk_mq_delay_run_hw_queue at 
#13 [] blk_mq_sched_insert_request at 
#14 [] blk_execute_rq at 
#15 [] dmp_send_scsi_work_fn at [vxdmp]
#16 [] process_one_work at 
#17 [] worker_thread at ffffffff8b8c1a9d

DESCRIPTION:
The kernel function used to create request from bios is not considering max_segment_size at the time of append, hence the issue is being observed.

RESOLUTION:
Appropriate logic has been added in the code to handle number of physical segment set correctly.

* 4134702 (Tracking ID: 4122396)

SYMPTOM:
vxvm-recover.service fails to start on linux platforms.

DESCRIPTION:
When using KillMode=control-group, stopping the vxvm-recover.service results in a failed state.
# systemctl status vxvm-boot.service
? vxvm-boot.service - VERITAS Volume Manager Boot service
     Loaded: loaded (/usr/lib/systemd/system/vxvm-boot.service; enabled; vendor preset: disabled)
     Active: failed (Result: timeout) since Thu 2023-06-15 12:41:47 IST; 52s ago

RESOLUTION:
Required code changes has been done to rectify the problem.

* 4135150 (Tracking ID: 4114867)

SYMPTOM:
Getting these error messages while adding new disks
[root@server101 ~]# cat /etc/udev/rules.d/41-VxVM-selinux.rules | tail -1
KERNEL=="VxVM*", SUBSYSTEM=="block", ACTION=="add", RUN+="/bin/sh -c 'if [ `/usr/sbin/getenforce` != "Disabled" -a `/usr/sbin/
[root@server101 ~]#
[root@server101 ~]# systemctl restart systemd-udevd.service
[root@server101 ~]# udevadm test /block/sdb 2>&1 | grep "invalid"
invalid key/value pair in file /etc/udev/rules.d/41-VxVM-selinux.rules on line 20, starting at character 104 ('D')

DESCRIPTION:
In /etc/udev/rules.d/41-VxVM-selinux.rules double quotation on Disabled and disable is the issue.

RESOLUTION:
Code changes have been made to correct the problem.

Patch ID: VRTSvxvm-7.4.2.4500

* 4128868 (Tracking ID: 4128867)

SYMPTOM:
Vulnerabilities have been reported in third party component, OpenSSL that is used by VxVM.

DESCRIPTION:
Third party component OpenSSL in its current versions,  used by VxVM have been reported with security vulnerabilities which 
needs

RESOLUTION:
OpenSSL have been upgraded to newer versions in which the reported security vulnerabilities have been addressed.

Patch ID: VRTSvxvm-7.4.2.4400

* 4092002 (Tracking ID: 4081740)

SYMPTOM:
vxdg flush command slow due to too many luns needlessly access /proc/partitions.

DESCRIPTION:
Linux BLOCK_EXT_MAJOR(block major 259) is used as extended devt for block devices. When partition number of one device is more than 15, the partition device gets assigned under major 259 to solve the sd limitations (16 minors per device), by which more partitions are allowed for one sd device. During "vxdg flush", for each lun in the disk group, vxconfigd reads file /proc/partitions line by line through fgets() to find all the partition devices with major number 259, which would cause vxconfigd to respond sluggishly if there are large amount of luns in the disk group.

RESOLUTION:
Code has been changed to remove the needless access on /proc/partitions for the luns without using extended devt.

* 4111010 (Tracking ID: 4108475)

SYMPTOM:
vxfentsthdw script failed with "Expect no writes for disks.."

DESCRIPTION:
In dmp_return_io() function DMP_SET_BP_ERROR() macro sets DKE_EACCES error on errbp but it is not reflected in errbp->orig_bp.
Because orig_bp is not a VxIO buffer because IO is not coming from VxIO here. 
DMP_BIODONE() is a macro that checks whether the IO buffer (errbp->orig_bp) is a VxIO buffer, if not then it return success even if the IO error occurred here.

RESOLUTION:
Need to handle this condition to fix this issue, added 2more iodone functions as VxIO signatures to identify the VxIO buffer in vxdmp driver.
handled non VxIO buffer case by setting proper error code on the io buffer.

* 4113327 (Tracking ID: 4102439)

SYMPTOM:
Customer observed failure When trying to run the vxencrypt rekey operation on an encrypted volume (to perform key rotation).

DESCRIPTION:
KMS token is of size 64 bytes, we are restricting the token size to 63 bytes and throw an error if the token size is more than 63.

RESOLUTION:
The issue is resolved by setting the assumption of token size to be size of KMS token, which is 64 bytes.

* 4115231 (Tracking ID: 4090772)

SYMPTOM:
vxconfigd/vx commands hang on secondary site in a CVR environment.

DESCRIPTION:
Due to a window with unmatched SRL positions, if any application (e.g. fdisk) trying
to open the secondary RVG volume will acquire a lock and wait for SRL positions to match.
During this if any vxvm transaction kicked in will also have to wait for same lock.
Further logowner node panic'd which triggered logownership change protocol which hung
as earlier transaction was stuck. As logowner change protocol could not complete,
in absence of valid logowner SRL position could not match and caused deadlock. That lead
to vxconfigd and vx command hang.

RESOLUTION:
Added changes to allow read operation on volume even if SRL positions are
unmatched. We are still blocking write IOs and just allowing open() call for read-only
operations, and hence there will not be any data consistency or integrity issues.

* 4116422 (Tracking ID: 4111254)

SYMPTOM:
vradmind dumps core with the following stack:

#3  0x00007f3e6e0ab3f6 in __assert_fail () from /root/cores/lib64/libc.so.6
#4  0x000000000045922c in RDS::getHandle ()
#5  0x000000000056ec04 in StatsSession::addHost ()
#6  0x000000000045d9ef in RDS::addRVG ()
#7  0x000000000046ef3d in RDS::createDummyRVG ()
#8  0x000000000044aed7 in PriRunningState::update ()
#9  0x00000000004b3410 in RVG::update ()
#10 0x000000000045cb94 in RDS::update ()
#11 0x000000000042f480 in DBMgr::update ()
#12 0x000000000040a755 in main ()

DESCRIPTION:
vradmind was trying to access a NULL pointer (Remote Host Name) in a rlink object, as the Remote Host attribute of the rlink hasn't been set.

RESOLUTION:
The issue has been fixed by making code changes.

* 4116427 (Tracking ID: 4108913)

SYMPTOM:
Vradmind dumps core with the following stacks:
#3  0x00007f2c171be3f6 in __assert_fail () from /root/coredump/lib64/libc.so.6
#4  0x00000000005d7a90 in VList::concat () at VList.C:1017
#5  0x000000000059ae86 in OpMsg::List2Msg () at Msg.C:1280
#6  0x0000000000441bf6 in OpMsg::VList2Msg () at ../../include/Msg.h:389
#7  0x000000000043ec33 in DBMgr::processStatsOpMsg () at DBMgr.C:2764
#8  0x00000000004093e9 in process_message () at srvmd.C:418
#9  0x000000000040a66d in main () at srvmd.C:733

#0  0x00007f4d23470a9f in raise () from /root/core.Jan18/lib64/libc.so.6
#1  0x00007f4d23443e05 in abort () from /root/core.Jan18/lib64/libc.so.6
#2  0x00007f4d234b3037 in __libc_message () from /root/core.Jan18/lib64/libc.so.6
#3  0x00007f4d234ba19c in malloc_printerr () from /root/core.Jan18/lib64/libc.so.6
#4  0x00007f4d234bba9c in _int_free () from /root/core.Jan18/lib64/libc.so.6
#5  0x00000000005d5a0a in ValueElem::_delete_val () at Value.C:491
#6  0x00000000005d5990 in ValueElem::~ValueElem () at Value.C:480
#7  0x00000000005d7244 in VElem::~VElem () at VList.C:480
#8  0x00000000005d8ad9 in VList::~VList () at VList.C:1167
#9  0x000000000040a71a in main () at srvmd.C:743

#0  0x000000000040b826 in DList::head () at ../include/DList.h:82
#1  0x00000000005884c1 in IpmHandle::send () at Ipm.C:1318
#2  0x000000000056e101 in StatsSession::sendUCastStatsMsgToPrimary () at StatsSession.C:1157
#3  0x000000000056dea1 in StatsSession::sendStats () at StatsSession.C:1117
#4  0x000000000046f610 in RDS::collectStats () at RDS.C:6011
#5  0x000000000043f2ef in DBMgr::collectStats () at DBMgr.C:2799
#6  0x00007f98ed9131cf in start_thread () from /root/core.Jan26/lib64/libpthread.so.0
#7  0x00007f98eca4cdd3 in clone () from /root/core.Jan26/lib64/libc.so.6

DESCRIPTION:
There is a race condition in vradmind that may cause memory corruption and unpredictable result. Vradmind periodically forks a child thread to collect VVR statistic data and send them to the remote site. While the main thread may also be sending data using the same handler object, thus member variables in the handler object are accessed in parallel from multiple threads and may become corrupted.

RESOLUTION:
The code changes have been made to fix the issue.

* 4116435 (Tracking ID: 4034741)

SYMPTOM:
Due to a common RVIOmem pool being used by multiple RVG, a deadlock scenario gets created, causing high load average and system hang.

DESCRIPTION:
The current fix limits IO load on secondary by retaining the updates in NMCOM pool until the DV write done, by which RVIOMEM pool became easy to fill up and 
deadlock situtaion may occur, esp. when high work load on multiple RVGs or cross direction RVGs.Currently all RVGs share the same RVIOMEM pool, while NMCOM 
pool, RDBACK pool and network/dv update list are all per-RVGs, so the RVIOMEM pool becomes the bottle neck on secondary, which is easy to full and run into 
deadlock situation.

RESOLUTION:
Code changes to honor per-RVG RVIOMEM pool to resolve the deadlock issue.

* 4116437 (Tracking ID: 4072862)

SYMPTOM:
In case RVGLogowner resources get onlined on slave nodes, stop the whole cluster may fail and RVGLogowner resources goes in to offline_propagate state.

DESCRIPTION:
While stopping whole cluster, the racing may happen between CVM reconfiguration and RVGLogowner change SIO.

RESOLUTION:
Code changes have been made to fix these racings.

* 4116576 (Tracking ID: 3972344)

SYMPTOM:
After reboot of a node on a setup where multiple diskgroups / Volumes within diskgroups are present, sometimes in /var/log/messages an error 'vxrecover ERROR V-5-1-11150  Volume <volume_name> does not exist' is logged.

DESCRIPTION:
In volume_startable function (volrecover.c), dgsetup is called to set the current default diskgroup. This does not update the current_group variable leading to inappropriate mappings. Volumes are searched in an incorrect diskgroup which is logged in the error message.
The vxrecover command works fine if the diskgroup name associated with volume is specified. [vxrecover -g <dg_name> -s]

RESOLUTION:
Changed the code to use switch_diskgroup() instead of dgsetup. Current_group is updated and the current_dg is set. Thus vxrecover finds the Volume correctly.

* 4117899 (Tracking ID: 4055159)

SYMPTOM:
vxdisk list showing incorrect value of LUN_SIZE for nvme disks

DESCRIPTION:
vxdisk list showing incorrect value of LUN_SIZE for nvme disks.

RESOLUTION:
Code changes have been done to show correct LUN_SIZE for nvme devices.

* 4117989 (Tracking ID: 4085145)

SYMPTOM:
The issue we are discussing is with AWS environment, on-prim physical/vm host this issue does not exist.( as ioctl and sysfs is giving same values)

DESCRIPTION:
The UDID value in case of Amazon EBS devices was going beyond its limit (read from sysfs as ioctl is not supported by AWS)

RESOLUTION:
Did code changes to fetch LSN through IOCTL as we have fix for intermittent ioctl failure.

* 4118256 (Tracking ID: 4028439)

SYMPTOM:
Not able to create cached volume due to SSD tag missing

DESCRIPTION:
Disk mediatype flag was not propagated previously, now updated during disk online.

RESOLUTION:
Code changes have been done to make mediatype tags visible during disk online

* 4119951 (Tracking ID: 4119950)

SYMPTOM:
Vulnerabilities have been reported in third party components, [curl and libxml] that are used by VxVM.

DESCRIPTION:
Third party components [curl and libxml] in their current versions,  used by VxVM have been reported with security vulnerabilities which 
needs

RESOLUTION:
[curl and libxml] have been upgraded to newer versions in which the reported security vulnerabilities have been addressed.

* 4120540 (Tracking ID: 4102532)

SYMPTOM:
/etc/default/vxsf file gets world write permission when "vxtune storage_connectivity asymmetric" is run.

DESCRIPTION:
umask for daemon process vxconfigd is 0 and not 0022. This is required for functionality to run properly. For this reason, any file created by vxconfigd gets world-write permission. When "vxtune storage_connectivity asymmetric" is run, a temporary file is created and then it is renamed to vxsf. So vxsf gets world write permission.

RESOLUTION:
Code changes done so that, instead of default permissions, specific permissions are set to file when file is created. So vxsf does not get world write permission.

* 4120545 (Tracking ID: 4090826)

SYMPTOM:
system panic at vol_page_offsetlist_sort with below stack:

vpanic()
kmem_error+0x5f0()
vol_page_offsetlist_sort+0x164()
volpage_freelist+0x278()
vol_cvol_shadow2_done+0xb8()

DESCRIPTION:
Due to a bug in sorting the large offset, the code overwrote the boundary of the allocated memory and caused the panic.

RESOLUTION:
The code change has been made to sort the large offset correctly.

* 4120547 (Tracking ID: 4093067)

SYMPTOM:
System panicked in the following stack:

#9  [] page_fault at  [exception RIP: bdevname+26]
#10 [] get_dip_from_device  [vxdmp]
#11 [] dmp_node_to_dip at [vxdmp]
#12 [] dmp_check_nonscsi at [vxdmp]
#13 [] dmp_probe_required at [vxdmp]
#14 [] dmp_check_disabled_policy at [vxdmp]
#15 [] dmp_initiate_restore at [vxdmp]
#16 [] dmp_daemons_loop at [vxdmp]

DESCRIPTION:
After got block_device from OS, DMP didn't do the NULL pointer check against block_device->bd_part. This NULL pointer further caused system panic when bdevname() was called.

RESOLUTION:
The code changes have been done to fix the problem.

* 4120720 (Tracking ID: 4086063)

SYMPTOM:
VxVM package uninstallation fails as no semodule policy is installed.

DESCRIPTION:
semodule policy gets loaded in %post stage of new package. After package upgrade no semodule policy is loaded, as the %preun stage removes the policy of upgraded package. While uninstalling the package the %preun stage fails as it tries to remove policy of upgraded package which was already removed while upgrading the package.

RESOLUTION:
Add the policy installation part to %posttrans stage of install script. This way policy installation is shifted to last stage of package upgrade. And the uninstallation is done successfully.

* 4120722 (Tracking ID: 4021816)

SYMPTOM:
VxVM package uninstallation fails after upgrade as semodule policy was removed during package upgrade.

DESCRIPTION:
After a VxVM package upgrade no semodule policy is loaded, the %preun stage is used to uninstall semodule policy and is followed in case of upgrade and uninstall of package. It is necessary for the %preun stage to be used only in case of uninstallation of package, as the stage is for old package.

RESOLUTION:
Code change to use %preun stage only in case of uninstallation of package.

* 4120724 (Tracking ID: 3995831)

SYMPTOM:
System hung: A large number of SIOs got queued in FMR.

DESCRIPTION:
When IO load is high, there may be not enough chunks available. In that case, DRL flushsio needs to drive fwait queue which may get some available chunks. Due a race condition and a bug inside DRL, DRL may queue the flushsio and fail to trigger flushsio again, then DRL ends in a permanent hung situation, not able to flush the dirty regions. The queued SIOs fails to be driven further hence system hung.

RESOLUTION:
Code changes have been made to drive SIOs which got queued in FMR.

* 4120728 (Tracking ID: 4090476)

SYMPTOM:
Storage Replicator Log (SRL) is not draining to secondary. rlink status shows the outstanding writes never got reduced in several hours.

VxVM VVR vxrlink INFO V-5-1-4640 Rlink xxx has 239346 outstanding writes, occupying 2210892 Kbytes (0%) on the SRL
VxVM VVR vxrlink INFO V-5-1-4640 Rlink xxx has 239346 outstanding writes, occupying 2210892 Kbytes (0%) on the SRL
VxVM VVR vxrlink INFO V-5-1-4640 Rlink xxx has 239346 outstanding writes, occupying 2210892 Kbytes (0%) on the SRL
VxVM VVR vxrlink INFO V-5-1-4640 Rlink xxx has 239346 outstanding writes, occupying 2210892 Kbytes (0%) on the SRL
VxVM VVR vxrlink INFO V-5-1-4640 Rlink xxx has 239346 outstanding writes, occupying 2210892 Kbytes (0%) on the SRL
VxVM VVR vxrlink INFO V-5-1-4640 Rlink xxx has 239346 outstanding writes, occupying 2210892 Kbytes (0%) on the SRL

DESCRIPTION:
In poor network environment, VVR seems not syncing. Another reconfigure happened before VVR state became clean, VVR atomic window got set to a large size. VVR couldnt complete all the atomic updates before the next reconfigure. VVR ended kept sending atomic updates from VVR pending position. Hence VVR appears to be stuck.

RESOLUTION:
Code changes have been made to update VVR pending position accordingly.

* 4120769 (Tracking ID: 4014894)

SYMPTOM:
Disk attach taking long time with reboot/hastop in FSS environment.

DESCRIPTION:
Current code in vxattachd is calling 'vxdg -k add disk' command for each disk separately and this is serialised. This means number of transaction are  initiated to add disk  and can impact application IO multiple times due to  IO quiesce/drain activity.

RESOLUTION:
code changes to add all disks in a single command, thus generating less transactions and execution time.

* 4120876 (Tracking ID: 4081434)

SYMPTOM:
VVR panic with below stack:

 #2 [ffff9683fa0efcc8] panic at ffffffff90d802cc
 #3 [ffff9683fa0efd48] vol_rv_service_message_start at ffffffffc2eeae0c [vxio]
 #4 [ffff9683fa0efe48] voliod_iohandle at ffffffffc2d2e276 [vxio]
 #5 [ffff9683fa0efe88] voliod_loop at ffffffffc2d2e68c [vxio]
 #6 [ffff9683fa0efec8] kthread at ffffffff906c5e61

DESCRIPTION:
At VVR primary side, data ack is received on primary and it will search its corresponding nio in rp_ack_waitq to call done function. But the nio may has already freed within vol_rp_flush_ack_waitq() during disconnecting rlink, then it caused panic while accessing the nio. With replica connection changes handling, for rp disconnect case, the flag VOL_RPFLAG_ACK_WAITQ_FLUSHING was set within vol_rp_flush_ack_waitq(),  to avoid such issue. But the flag was cleared earlier just after creating rp ports during rlink connect.

RESOLUTION:
The fix clears the flag during handling replica connection changes, for rp connect case symmetrically.

* 4120899 (Tracking ID: 4116024)

SYMPTOM:
kernel panicked at gab_ifreemsg with following stack:
gab_ifreemsg
gab_freemsg
kmsg_gab_send
vol_kmsg_sendmsg
vol_kmsg_sender

DESCRIPTION:
In a CVR environment there is a RVG of > 600 data volumes, enabling vxvvrstatd daemon through service vxvm-recover. vxvvrstatd calls into ioctl(VOL_RV_APPSTATS) , the latter will generate a kmsg whose length is longer than 64k and trigger a kernel panic due to GAB/LLT no support any message longer than 64k.

RESOLUTION:
Code changes have been done to add a limitation to the maximum number of data volumes for which that ioctl(VOL_RV_APPSTATS) can request the VVR statistics.

* 4120903 (Tracking ID: 4100775)

SYMPTOM:
vxconfigd kept waiting for IO drain when removed dmpnodes. It was hung with below stack:
[] dmpsync_wait+0xa7/0xf0 [vxdmp]
[] dmp_destroy_mp_node+0x98/0x120 [vxdmp]
[] dmp_decode_destroy_dmpnode+0xd3/0x100 [vxdmp]
[] dmp_decipher_instructions+0x2d7/0x390 [vxdmp]
[] dmp_process_instruction_buffer+0x1be/0x1e0 [vxdmp]
[] dmp_reconfigure_db+0x5b/0xe0 [vxdmp]
[] gendmpioctl+0x76c/0x950 [vxdmp]
[] dmpioctl+0x39/0x80 [vxdmp]
[] dmp_ioctl+0x3a/0x70 [vxdmp]
[] blkdev_ioctl+0x28a/0xa20
[] block_ioctl+0x41/0x50
[] do_vfs_ioctl+0x3a0/0x5b0
[] SyS_ioctl+0xa1/0xc0

DESCRIPTION:
XFS utilizes chained BIO feature to send BIOs to VxDMP. While the chained BIO isn't supported by VxDMP, it caused VxDMP kept waiting for a completed BIO.

RESOLUTION:
Code changes have been made to support chained BIO on rhel7.

* 4120916 (Tracking ID: 4112687)

SYMPTOM:
vxdisk resize corrupts disk public region and causes file system mount fail.

DESCRIPTION:
For single path disk, during two transactions of resize operation, the private region IOs could be incorrectly sent to partition 3 of the GPT disk, which would cause 48 more sectors shift.  This may make the private region data written to public region and cause corruption.

RESOLUTION:
Code changes have been made to fix the problem.

* 4121075 (Tracking ID: 4100069)

SYMPTOM:
One of standard disk groups fails to auto-import when those disk groups co-exist with the cloned disk group. It failed with below error in syslog.
vxvm:vxconfigd[xxx]: V-5-1-569 Disk group <disk group name>, Disk <dmpnode name> Cannot auto-import group:
vxvm:vxconfigd[xxx]: #011Disk for disk group not found

DESCRIPTION:
The importflags wasn't reset before starting the next disk group import, further caused the next disk group import inherited all the flags from the last round of disk group import. The improper importflags caused the failure.

RESOLUTION:
Code changes have been made to reset importflags in every round of disk group import.

* 4121081 (Tracking ID: 4098965)

SYMPTOM:
Vxconfigd dumping Core when scanning IBM XIV Luns with following stack.

#0  0x00007fe93c8aba54 in __memset_sse2 () from /lib64/libc.so.6
#1  0x000000000061d4d2 in dmp_getenclr_ioctl ()
#2  0x00000000005c54c7 in dmp_getarraylist ()
#3  0x00000000005ba4f2 in update_attr_list ()
#4  0x00000000005bc35c in da_identify ()
#5  0x000000000053a8c9 in find_devices_in_system ()
#6  0x000000000053aab5 in mode_set ()
#7  0x0000000000476fb2 in ?? ()
#8  0x00000000004788d0 in main ()

DESCRIPTION:
This could cause 2 issues if there are more than 1 disk arrays connected:

1. If the incorrect memory address exceeds the range of valid virtual memory, it will trigger "Segmentation fault" and crash vxconfigd.
2. If  the incorrect memory address does not exceed the range of valid virtual memory, it will cause memory corruption issue but maybe not trigger vxconfigd crash issue.

RESOLUTION:
Code changes have been made to correct the problem.

* 4121083 (Tracking ID: 4105953)

SYMPTOM:
System panic with below stack in CVR environment.

 #9 [] page_fault at 
    [exception RIP: vol_ru_check_update_done+183]
#10 [] vol_rv_write2_done at [vxio]
#11 [] voliod_iohandle at [vxio]
#12 [] voliod_loop at [vxio]
#13 [] kthread at

DESCRIPTION:
In CVR environment, when IO is issued in writeack sync mode we ack to application when datavolwrite is done on either log client or logowner depending on 
where IO is issued on. it could happen that VVR freed the metadata I/O update after SRL write is done incase of writeack sync mode, but later after freeing the update, its accessed again and hence we end up in hitting NULL ptr deference.

RESOLUTION:
Code changes have been made to avoid the accessing NULL pointer.

* 4121222 (Tracking ID: 4095718)

SYMPTOM:
vxesd kept waiting for IO drain with below stack and other tasks like vxpath_links were in hung status too.

#0 [] __schedule at
#1 [] schedule at
#2 [] dmpsync_wait at [vxdmp]
#3 [] dmp_drain_path at [vxdmp]
#4 [] dmp_disable_path at [vxdmp]
#5 [] dmp_change_path_state at [vxdmp]
#6 [] gendmpioctl at [vxdmp]
#7 [] dmpioctl at [vxdmp]
#8 [] dmp_ioctl at [vxdmp]

DESCRIPTION:
Due to storage related activities, some subpaths have been changed to DISABLE which was triggered by vxesd. All the subpaths which belong to the same dmpnode were marked as QUIESCED too. In case any subpaths are handling error IO, vxesd needs to wait till the error process is finished. It might happen the error process failed to wake up vxesd due to a bug. The hung vxesd further caused all coming IOs against those dmpnodes got queued in DMP defer queue. As a result, all tasks who are waiting for IO to complete on those dmpnodes are in a permanent hung too.

RESOLUTION:
The code changes have been made to wake up the tasks who are waiting for DMP error handling to be done.

* 4121243 (Tracking ID: 4101588)

SYMPTOM:
vxtune displays vol_rvio_maxpool_sz as zero when it's over 4g.

DESCRIPTION:
The tunable vol_rvio_maxpool_sz is defined as size_t type that is 64 bit long in 64 bit binary, while vxtune displays it as 32 
bit unsigned int type, so it's showed as zero when it's over max unsigned int(4gb).

RESOLUTION:
The issue has been fixed by the code changes.

* 4121254 (Tracking ID: 4115078)

SYMPTOM:
vxconfigd hung was observed when reboot all nodes of the primary site.

DESCRIPTION:
When vvr logowner node wasn't configured on Master. VVR recovery was triggered by node leaving, in case data volume was in recovery, vvr logowner would send ilock request to Master node. Master granted the ilock request and sent a response to vvr logonwer. But due to a bug, ilock requesting node id mismatch was detected by vvr logowner. VVR logowner thought the ilock grant failed, mdship IO went into a permanent hang. vxconfigd was stuck and kept waiting for IO drain.

RESOLUTION:
Code changes have been made to correct the ilock requesting node id in the ilock request in such case.

* 4121681 (Tracking ID: 3995731)

SYMPTOM:
vxconfigd died with below stack info:

#0  in vfprintf () from /lib64/libc.so.6
#1  in vsnprintf () from /lib64/libc.so.6
#2  in msgbody_va ()
#3  in msg () at misc.c:1430
#4  in krecover_mirrorvol () at krecover.c:1244
#5  krecover_dg_objects_20 () at krecover.c:515
#6  krecover_dg_objects () at krecover.c:303
#7  in dg_import_start () at dgimport.c:7721
#8  in dg_reimport () at dgimport.c:3337
#9  in dg_recover_all () at dgimport.c:4885

DESCRIPTION:
the VVR objects were removed before upgrade. vxconfigd accessed the NULL object and died.

RESOLUTION:
Code changes have been made to access the valid record during recovery.

* 4121763 (Tracking ID: 3995308)

SYMPTOM:
vxtask status hang due to incorrect values getting copied into task status information.

DESCRIPTION:
When doing atomic-copy admin task, VxVM copy the entire request structure passed as response of the task status in local copy. This creates some issues of incorrect copy/overwrite of pointer.

RESOLUTION:
Code changes have been made to fix the problem.

* 4121767 (Tracking ID: 4117568)

SYMPTOM:
Vradmind dumps core with the following stack:

#1  std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string (this=0x7ffdc380d810,
    __str=<error reading variable: Cannot access memory at address 0x3736656436303563>)
#2  0x000000000040e02b in ClientMgr::closeStatsSession
#3  0x000000000040d0d7 in ClientMgr::client_ipm_close
#4  0x000000000058328e in IpmHandle::~IpmHandle
#5  0x000000000057c509 in IpmHandle::events
#6  0x0000000000409f5d in main

DESCRIPTION:
After terminating vrstat, the StatSession in vradmind was closed and the corresponding Client object was deleted. When closing the IPM object of vrstat, try to access the removed Client, hence the core dump.

RESOLUTION:
Core changes have been made to fix the issue.

* 4121875 (Tracking ID: 4090943)

SYMPTOM:
On Primary, RLink is continuously getting connected/disconnected with below message seen in secondary syslog:
  VxVM VVR vxio V-5-3-0 Disconnecting replica <rlink_name> since log is full on secondary.

DESCRIPTION:
When RVG logowner node panic, RVG recovery happens in 3 phases.
At the end of 2nd phase of recovery in-memory and on-disk SRL positions remains incorrect
and during this time if there is logowner change then Rlink won't get connected.

RESOLUTION:
Handled in-memory and on-disk SRL positions correctly.

* 4123313 (Tracking ID: 4114927)

SYMPTOM:
After enabling dmp_native_support and taking reboot, /boot is not mounted VxDMP node.

DESCRIPTION:
When dmp_native_support is enabled, vxdmproot script is expected to modify the /etc/fstab entry for /boot so that on next boot up, /boot is mounted on dmp device instead of OS device. Also, this operation modifies SELinux context of file /etc/fstab. This causes the machine to go into maintenance mode because of a read permission denied error for /etc/fstab on boot up.

RESOLUTION:
Code changes have been done to make sure SELinux context is preserved for /etc/fstab file and /boot is mounted on dmp device when dmp_native_support is enabled.

* 4124324 (Tracking ID: 4098582)

SYMPTOM:
Customer have found the log file /var/log/vx/ddl.log which breaks one of the policies, as it keeps being created with 644 permissions

DESCRIPTION:
File permissions in /var/log/vx/ddl.log after logrotation to be 640 as per security compliance

RESOLUTION:
Appropriate code changes are done to handle scenario

* 4126041 (Tracking ID: 4124223)

SYMPTOM:
Core dump is generated for vxconfigd in TC execution.

DESCRIPTION:
TC creates a scenario where 0s are written in first block of disk. In such case, Null check is necessary in code before some variable is accessed. This Null check is missing which causes vxconfigd core dump in TC execution.

RESOLUTION:
Necessary Null checks is added in code to avoid vxconfigd core dump.

* 4127473 (Tracking ID: 4089626)

SYMPTOM:
On RHEL8.5, IO hang occurrs when creating XFS on VxDMP devices or writing file on mounted XFS from VxDMP devices.

DESCRIPTION:
XFS utilizes chained BIO feature to send BIOs to VxDMP. While the chained BIO isn't suported by VxDMP, hence the BIOs may struck in SCSI disk driver.

RESOLUTION:
Code changes have been made to support chained BIO.

* 4127475 (Tracking ID: 4114601)

SYMPTOM:
System gets panicked and rebooted

DESCRIPTION:
RCA:
Start the IO on volume device and pull out it's disk from the machine and hit below panic on RHEL8.

 dmp_process_errbp
 dmp_process_errbuf.cold.2+0x328/0x429 [vxdmp]
 dmpioctl+0x35/0x60 [vxdmp]
 dmp_flush_errbuf+0x97/0xc0 [vxio]
 voldmp_errbuf_sio_start+0x4a/0xc0 [vxio]
 voliod_iohandle+0x43/0x390 [vxio]
 voliod_loop+0xc2/0x330 [vxio]
 ? voliod_iohandle+0x390/0x390 [vxio]
 kthread+0x10a/0x120
 ? set_kthread_struct+0x50/0x50

As disk pulled out from the machine VxIO hit a IO error and it routed that IO to dmp layer via kernel-kernel IOCTL for error analysis.
following is the code path for IO routing,

voldmp_errbuf_sio_start()-->dmp_flush_errbuf()--->dmpioctl()--->dmp_process_errbuf()

dmp_process_errbuf() retrieves device number of the underlying path (os-device).
and it tries to get bdev (i.e. block_device) pointer from path-device number.
As path/os-device is removed by disk pull, linux returns fake bdev for the path-device number.
For this fake bdev there is no gendisk associated with it (bdev->bd_disk is NULL).

We are setting this NULL bdev->bd_disk to the IO buffer routed from vxio.
which leads a panic on dmp_process_errbp.

RESOLUTION:
If bdev->bd_disk found NULL then set DMP_CONN_FAILURE error on the IO buffer and return DKE_ENXIO to vxio driver

Patch ID: VRTSaslapm 7.4.2.4400

* 4116214 (Tracking ID: 4117350)

SYMPTOM:
Below error is observed when trying to import # vxdg -n SVOL_SIdg -o useclonedev=on -o updateid import SIdg VxVM vxdg ERROR V-5-1-0 Disk group SIdg: import failed: Replicated dg record is found. Did you want to import hardware replicated LUNs? Try vxdg [-o usereplicatedev=only] import option with -c[s] Please refer to system log for details.

DESCRIPTION:
REPLICATED flag is used to identify a hardware replicated device so to import dg on the REPLICATED disks , usereplicatedev option must be used . As that was not provided hence issue was observed .

RESOLUTION:
REPLICATED flag has been removed for Hitachi ShadowImage (SI) disks.

Patch ID: VRTSvxvm-7.4.2.4300

* 4119951 (Tracking ID: 4119950)

SYMPTOM:
Vulnerabilities have been reported in third party components, [curl and libxml] that are used by VxVM.

DESCRIPTION:
Third party components [curl and libxml] in their current versions,  used by VxVM have been reported with security vulnerabilities which 
needs

RESOLUTION:
[curl and libxml] have been upgraded to newer versions in which the reported security vulnerabilities have been addressed.

Patch ID: VRTSaslapm 7.4.2.4300

* 4119951 (Tracking ID: 4119950)

SYMPTOM:
Vulnerabilities have been reported in third party components, [curl and libxml] that are used by VxVM.

DESCRIPTION:
Third party components [curl and libxml] in their current versions, used by VxVM have been reported with security vulnerabilities which needs

RESOLUTION:
[curl and libxml] have been upgraded to newer versions in which the reported security vulnerabilities have been addressed.

Patch ID: VRTSvxvm-7.4.2.4100

* 4116348 (Tracking ID: 4112433)

SYMPTOM:
Vulnerabilities have been reported in third party components, [openssl, curl and libxml] that are used by VxVM.

DESCRIPTION:
Third party components [openssl, curl and libxml] in their current versions,  used by VxVM have been reported with security vulnerabilities which needs

RESOLUTION:
[openssl, curl and libxml] have been upgraded to newer versions in which the reported security vulnerabilities have been addressed.

Patch ID: VRTSaslapm 7.4.2.4100

* 4116348 (Tracking ID: 4112433)

SYMPTOM:
Vulnerabilities have been reported in third party components, [openssl, curl and libxml] that are used by VxVM.

DESCRIPTION:
Third party components [openssl, curl and libxml] in their current versions, used by VxVM have been reported with security vulnerabilities which needs

RESOLUTION:
[openssl, curl and libxml] have been upgraded to newer versions in which the reported security vulnerabilities have been addressed.

Patch ID: VRTSvxvm-7.4.2.3900

* 4110560 (Tracking ID: 4104927)

SYMPTOM:
vxvm-boot.service fails to start on linux platforms other than SLES15

DESCRIPTION:
SLES15 specific attribute changes causes vxvm-boot.service to fail to start on other linux platforms.

RESOLUTION:
A new vxvm-boot.service file to honour vxvm-boot.service for SLES15, the existing vxvm-boot.service file will serve for other linux platforms.

* 4113324 (Tracking ID: 4113323)

SYMPTOM:
Existing package failed to load on RHEL 8.8 server.

DESCRIPTION:
RHEL 8.8 is a new release and hence VxVM module is compiled with this new kernel along with few other changes.

RESOLUTION:
Compiled VxVM code against 8.8 kernel and made changes to make it compatible.

* 4113661 (Tracking ID: 4091076)

SYMPTOM:
SRL gets into pass-thru mode when it's about to overflow.

DESCRIPTION:
Primary initiated log search for the requested update sent from secondary. The search aborted with head error as a check condition isn't set correctly.

RESOLUTION:
Fixed the check condition to resolve the issue.

* 4113663 (Tracking ID: 4095163)

SYMPTOM:
System panic with below stack:
 #6 [] invalid_op at 
    [exception RIP: __slab_free+414]
 #7 [] kfree at 
 #8 [] vol_ru_free_update at [vxio]
 #9 [] vol_ru_free_updateq at  [vxio]
#10 [] vol_rv_write2_done at [vxio]
#11 [] voliod_iohandle at [vxio]
#12 [] voliod_loop at [vxio]

DESCRIPTION:
The update gets freed as a part of VVR recovery. At the same time, this update also gets freed in VVR second phase of write. Hence there is a race in freeing the updates and caused the system panic.

RESOLUTION:
Code changes have been made to avoid

* 4113664 (Tracking ID: 4091390)

SYMPTOM:
vradmind hit the core dump while accessing pHdr, which is already freed.

DESCRIPTION:
While processing the config message - CFG_UPDATE, we incorrectly freed the existing config message objects. Later, objects are accessed again which dumped the vradmind core.

RESOLUTION:
Changes are done to access the correct configuration objects.

* 4113666 (Tracking ID: 4064772)

SYMPTOM:
After enabling slub debug, system could hang with IO load.

DESCRIPTION:
When creating VxVM I/O memory, VxVM does not align the cache size. This unaligned length will be treated as an invalid I/O length in SCSI layer, which causes some I/O requests are stuck in an invalid state and results in the I/Os never being able to complete. Thus system hang could be observed, especially after cache slub debug is enabled.

RESOLUTION:
Code changes have been done to align the cache size.

Patch ID: VRTSaslapm 7.4.2.3900

* 4116885 (Tracking ID: 4116868)

SYMPTOM:
Support for ASLAPM on RHEL 8.8

DESCRIPTION:
RHEL 8.8 is new release and hence APM module should be recompiled with new kernel.

RESOLUTION:
Compiled APM with RHEL 8.8 kernel.

Patch ID: VRTSvxvm-7.4.2.3800

* 4110666 (Tracking ID: 4110665)

SYMPTOM:
A security vulnerability exists in the third-party component libcurl.

DESCRIPTION:
VxVM uses a third-party component named libcurl in which a security vulnerability exists.

RESOLUTION:
VxVM is updated to use a newer version of libcurl in which the security vulnerability has been addressed.

* 4110766 (Tracking ID: 4112033)

SYMPTOM:
A security vulnerability exists in the third-party component libxml2.

DESCRIPTION:
VxVM uses a third-party component named libxml2in which a security vulnerability exists.

RESOLUTION:
VxVM is updated to use a newer version of libxml2 in which the security vulnerability has been addressed.

Patch ID: VRTSaslapm 7.4.2.3800

* 4110666 (Tracking ID: 4110665)

SYMPTOM:
A security vulnerability exists in the third-party component libcurl.

DESCRIPTION:
VxVM uses a third-party component named libcurl in which a security vulnerability exists.

RESOLUTION:
VxVM is updated to use a newer version of libcurl in which the security vulnerability has been addressed.

* 4110766 (Tracking ID: 4112033)

SYMPTOM:
A security vulnerability exists in the third-party component libxml2.

DESCRIPTION:
VxVM uses a third-party component named libxml2in which a security vulnerability exists.

RESOLUTION:
VxVM is updated to use a newer version of libxml2 in which the security vulnerability has been addressed.

Patch ID: VRTSvxvm-7.4.2.3700

* 4105752 (Tracking ID: 4107924)

SYMPTOM:
Old VxVM rpm fails to load on RHEL8.7 minor kernel 4.18.0-425.10.1.el8_7.x86_64

DESCRIPTION:
RedHat did some critical changes in latest kernel which causing soft-lockup issue to VxVM kernel modules while installation.

RESOLUTION:
As suggested by RedHat (https://access.redhat.com/solutions/6985596) VxVM modules compiled with RHEL 8.7 minor kernel.

* 4106001 (Tracking ID: 4102501)

SYMPTOM:
A security vulnerability exists in the third-party component libcurl.

DESCRIPTION:
VxVM uses a third-party component named libcurl in which a security vulnerability exists.

RESOLUTION:
VxVM is updated to use a newer version of libcurl in which the security vulnerability has been addressed.

* 4107223 (Tracking ID: 4107802)

SYMPTOM:
vxdmp fails to load and system hangs.

DESCRIPTION:
This issue occurs due to changes in the RHEL8.7 minor kernel and incorrect module is calculated for best-fit.

RESOLUTION:
Modified existing modinst-vxvm script to calculate correct best-fit module.

Patch ID: VRTSaslapm 7.4.2.3700

* 4106001 (Tracking ID: 4102501)

SYMPTOM:
A security vulnerability exists in the third-party component libcurl.

DESCRIPTION:
VxVM uses a third-party component named libcurl in which a security vulnerability exists.

RESOLUTION:
VxVM is updated to use a newer version of libcurl in which the security vulnerability has been addressed.

* 4107931 (Tracking ID: 4107932)

SYMPTOM:
Support for ASLAPM on RHEL8.7 minor kernel 4.18.0-425.10.1.el8_7.x86_64

DESCRIPTION:
RedHat did some critical changes in latest kernel which causing soft-lockup issue kernel modules while installation.

RESOLUTION:
As suggested by RedHat (https://access.redhat.com/solutions/6985596) modules compiled with RHEL 8.7 minor kernel.

Patch ID: VRTSvxvm-7.4.2.3600

* 4102424 (Tracking ID: 4103350)

SYMPTOM:
Following error message is seen on running vradmin -encrypted addsec command.

# vradmin -g enc_dg2 -encrypted addsec enc_dg2_rvg1 123.123.123.123 234.234.234.234
Message from Host 234.234.234.234:
Job for vxvm-encrypt.service failed.
See "systemctl status vxvm-encrypt.service" and "journalctl -xe" for details.
VxVM vxvol ERROR V-5-1-18863 Failed to start vxvm-encrypt service. Error:1.

DESCRIPTION:
"vradmin -encrypted addsec" command fails on primary because vxvm-encrypt.service goes into failed state on secondary site. On secondary master, vxvm-encrypt.service tries to restart 5 times and goes into failed state.

RESOLUTION:
Code changes have been done to prevent vxvm-encrypt.service from going into failed state.

Patch ID: VRTSaslapm 7.4.2.3600

* 4076495 (Tracking ID: 4076320)

SYMPTOM:
Not Able to get ARRAY_VOLUME_ID, old_udid. # vxdisk -p list 3pardata1_3 |grep -i ARRAY_VOLUME_ID # vxdisk -p list 3pardata1_3 |grep -i old_udid.

DESCRIPTION:
AVID, reclaim_cmd_nv, extattr_nv, old_udid_nv is not generated for HPE 3PAR/Primera/Alletra 9000 ALUA array.

RESOLUTION:
Code changes added to generate AVID, reclaim_cmd_nv, extattr_nv, old_udid_nv for HPE 3PAR/Primera/Alletra 9000 ALUA array have been done.

Patch ID: VRTSvxvm-7.4.2.3500

* 4012176 (Tracking ID: 3996206)

SYMPTOM:
Paths from different 3PAR LUNs shown under single Volume Manager device (VxVM disk).

DESCRIPTION:
VxVM uses "LUN serial number" to identify a LUN unique. This "LUN serial number" is fetched by doing SCSI inquiry
on VPD page 0. The "LUN serial number" obtained from VPD page 0 doesn't always guarantee uniqueness of LUN. Due to this
when paths from 2 diffent 3PAR LUNs have same "LUN serial number" DMP adds them under a single device/disk.

RESOLUTION:
Changes have been done in 3PAR ASL to fetch "LUN serial number" from VPD page 0x83 that gaurentees unqiue number for LUN.

* 4013169 (Tracking ID: 4011691)

SYMPTOM:
Observed high CPU consumption on the VVR secondary nodes because of high pending IO load.

DESCRIPTION:
High replication related IO load on the VVR secondary and the requirement of maintaining write order fidelity with limited memory pools created  contention. This resulted in multiple VxVM kernel threads contending for shared resources and there by increasing the CPU consumption.

RESOLUTION:
Limited the way in which VVR consumes its resources so that a high pending IO load would not result into high CPU consumption.

* 4052119 (Tracking ID: 4045871)

SYMPTOM:
vxconfigd crashed at ddl_get_disk_given_path with following stacks:
ddl_get_disk_given_path
ddl_reconfigure_all
ddl_find_devices_in_system
find_devices_in_system
mode_set
setup_mode
startup
main
_start

DESCRIPTION:
Under some situations, duplicate paths can be added in one dmpnode in vxconfigd. If the duplicate paths are removed then the empty path entry can be generated for that dmpnode. Thus, later when vxconfigd accesses the empty path entry, it crashes due to NULL pointer reference.

RESOLUTION:
Code changes have been done to avoid the duplicate paths that are to be added.

* 4086043 (Tracking ID: 4072241)

SYMPTOM:
-bash-5.1# /usr/lib/vxvm/voladm.d/bin/dmpdr
Dynamic Reconfiguration Operations

WARN: Please Do not Run any Device Discovery Operations outside the Tool during Reconfiguration operations
INFO: The logs of current operation can be found at location /var/log/vx/dmpdr_20220420_1042.log
ERROR: Failed to open lock file for /usr/lib/vxvm/voladm.d/bin/dmpdr, No such file or directory. Exit.

Exiting the Current DMP-DR Run of the Tool

DESCRIPTION:
VxVM Log location for linux changed which impacted vxdiskadm functionality on solaris .

RESOLUTION:
Required changed have been done to make code changes work across platforms.

* 4090311 (Tracking ID: 4039690)

SYMPTOM:
Change the logger files size to collect the large amount of logs in the system.

DESCRIPTION:
Double the logger files size limit and improve on logger size footprint by using gzip on logger files.

RESOLUTION:
Completed required code changes to do this enhancement.

* 4090411 (Tracking ID: 4054685)

SYMPTOM:
RVG recovery gets hung in case of reconfiguration scenarios in CVR environments leading to vx commands hung on master node.

DESCRIPTION:
As a part of rvg recovery we perform DCM, datavolume recovery. But datavolume recovery takes long time due to wrong IOD handling done in linux platforms.

RESOLUTION:
Fix the IOD handling mechanism to resolve the rvg recovery handling.

* 4090415 (Tracking ID: 4071345)

SYMPTOM:
Replication is unresponsive after failed site is up.

DESCRIPTION:
Autosync and unplanned fallback synchronisation had issues in a mix of cloud and non-cloud Volumes in RVG.
After a cloud volume is found rest of the volumes were getting ignored for synchronisation

RESOLUTION:
Fixed condition to make it iterate over all Volumes.

* 4090442 (Tracking ID: 4078537)

SYMPTOM:
When connection to s3-fips bucket is made below error messages are observed :
2022-05-31 03:53:26 VxVM ERROR V-5-1-19512 amz_request_perform: PUT request failed, url: https://s3-fips.us-east-2.amazonaws.com/fipstier334f3956297c8040078280000d91ab70a/2.txt_27ffff625eff0600442d000013ffff5b_999_7_1077212296_0_1024_38, errno 11
2022-05-31 03:53:26 VxVM ERROR V-5-1-19333 amz_upload_object: amz_request_perform failed for obj:2.txt_27ffff625eff0600442d000013ffff5b_999_7_1077212296_0_1024_38
2022-05-31 03:53:26 VxVM WARNING V-5-1-19752 Try upload_object(fipstier334f3956297c8040078280000d91ab70a/2.txt_27ffff625eff0600442d000013ffff5b_999_7_1077212296_0_1024_38) again, number of requests attempted: 3.
2022-05-31 03:53:26 VxVM ERROR V-5-1-19358 curl_send_request: curl_easy_perform() failed: Couldn't resolve host name
2022-05-31 03:53:26 VxVM ERROR V-5-1-0 curl_request_perform: Error in curl_request_perform 6
2022-05-31 03:53:26 VxVM ERROR V-5-1-19357 curl_request_perform: curl_send_request failed with error: 6

DESCRIPTION:
For s3-fips bucket endpoints, AWS has made it mandatory to use the virtual-hosted style methods to connect to the s3-fips bucket instead of path-hosted style method which is currently used by Infoscale.

RESOLUTION:
Code changes are done to send cloud requestss3-fips bucket successfully.

* 4090541 (Tracking ID: 4058166)

SYMPTOM:
While setting up VVR/CVR on large size data volumes (size > 3TB) with filesystems mounted on them, initial autosync operation takes a lot of time to complete.

DESCRIPTION:
While performing autosync on VVR/CVR setup for a volume with filesystem mounted, if smartmove feature is enabled, the operation does smartsync by syncing only the regions dirtied by filesystem, instead of syncing entire volume, which completes faster than normal case. However, for large size volumes (size > 3TB),

smartmove feature does not get enabled, even with filesystem mounted on them and hence autosync operation syncs entire volume.

This behaviour is due to smaller size DCM plexes allocated for such large size volumes, autosync ends up performing complete volume sync, taking lot more time to complete.

RESOLUTION:
Increase the limit of DCM plex size (loglen) beyond 2MB so that smart move feature can be utilised properly.

* 4090599 (Tracking ID: 4080897)

SYMPTOM:
Observed Performance drop on raw VxVM volume in RHEL 8.x compared to RHEL7.X

DESCRIPTION:
There has been change in file_operations used for character devices from RHEL 7.X and RHEL8.X releases. In RHEL 7.X aio_read and aio_write function pointers are implemented whereas this has changed to read_iter and write_iter respectively in the latest release. In RHEL 8.X changes, VxVM code called generic_file_write_iter(). The problem here is that this function takes an inode-lock. And in the multi-thread write operation, this semaphore basically causes serial processing of IO submission leading to dropped performance.

RESOLUTION:
Use of __generic_file_write_iter() function helps to resolve the issue and vxvm_generic_write_sync() function is implemented which handles the SYNCing part of the write similar to functions like blkdev_write_iter() and generic_file_write_iter().

* 4090604 (Tracking ID: 4044529)

SYMPTOM:
DMP is unable to display PWWN details for some LUNs by "vxdmpadm getportids".

DESCRIPTION:
Udev rules file(/usr/lib/udev/rules.d/63-fc-wwpn-id.rules) from newer RHEL OS will generate an addtional hardware path for a FC device, hence there will be 2 hardware paths for the same device. However vxpath_links script only consider single hardware path for a FC device. In the case of 2 hardware paths, vxpath_links may not treat it as a FC device, thus fail to populate PWWN related information.

RESOLUTION:
Code changes have been done to make vxpath_links correctly detect FC device even there are multiple hardware paths.

* 4090932 (Tracking ID: 3996634)

SYMPTOM:
A system boot with large number of luns managed by VxDMP take a long time.

DESCRIPTION:
When a system has large number of luns managed by VxDMP which mounted on a primary partition or has formatted with some type of File system, during boot, the DMP device would be removed and UDEV trigger event against the OS device, the OS device would be read from lsblk command. The lsblk command is slow and if the lsblk commands issued against multiple devices in parallel, it may be stuck, then the system boot take a long time.

RESOLUTION:
Code has been changed to read the OS device from blkid command rather than lsblk command.

* 4090946 (Tracking ID: 4023297)

SYMPTOM:
Smartmove functionality was not being used after VVR Rlink was paused and resumed during VVR initial sync or DCM resync operation. This was resulting in more data transfer to VVR secondary site than needed.

DESCRIPTION:
The transactions for VVR pause and resume operations were being considered as phases after which smartmove is not necessary to be used. This was resulting in smartmove not being used after the resume operation.

RESOLUTION:
Fixed the condition so that smartmove continues to work beyond pause/resume operations.

* 4090960 (Tracking ID: 4087770)

SYMPTOM:
Data corruption post mirror attach operation seen after complete storage fault for DCO volumes.

DESCRIPTION:
DCO (data change object) tracks delta changes for faulted mirrors. During complete storage loss of DCO volume mirrors in, DCO object will be marked as BADLOG and becomes unusable for bitmap tracking.
Post storage reconnect (such as node rejoin in FSS environments) DCO will be re-paired for subsequent tracking. During this if VxVM finds any of the mirrors detached for data volumes, those are expected to be marked for full-resync as bitmap in DCO has no valid information. Bug in repair DCO operation logic prevented marking mirror for full-resync in cases where repair DCO operation is triggered before data volume is started. This resulted into mirror getting attached without any data being copied from good mirrors and hence reads serviced from such mirrors have stale data, resulting into file-system corruption and data loss.

RESOLUTION:
Code has been added to ensure repair DCO operation is performed only if volume object is enabled so as to ensure detached mirrors are marked for full-resync appropriately.

* 4090970 (Tracking ID: 4017036)

SYMPTOM:
After enabling DMP (Dynamic Multipathing) Native support, enable /boot to be
mounted on DMP device when Linux is booting with systemd.

DESCRIPTION:
Currently /boot is mounted on top of OS (Operating System) device. When DMP
Native support is enabled, only VG's (Volume Groups) are migrated from OS 
device to DMP device.This is the reason /boot is not migrated to DMP device.
With this if OS device path is not available then system becomes unbootable 
since /boot is not available. Thus it becomes necessary to mount /boot on DMP
device to provide multipathing and resiliency. 
The current fix can only work on configurations with single boot partition.

RESOLUTION:
Code changes have been done to migrate /boot on top of DMP device when DMP
Native support is enabled and when Linux is booting with systemd.

* 4091248 (Tracking ID: 4040808)

SYMPTOM:
df command hung in clustered environment

DESCRIPTION:
df command hung in clustered environment due to drl updates are not getting complete causing application IOs to hang.

RESOLUTION:
Fis is added to complete incore DRL updates and drive corresponding application IOs

* 4091588 (Tracking ID: 3966157)

SYMPTOM:
the feature of SRL batching was broken and we were not able to enable it as it might caused problems.

DESCRIPTION:
Batching of updates needs to be done as to get benefit of batching multiple updates and getting performance increased

RESOLUTION:
we have decided to simplify the working as we are now aligning each of the small update within a total batch to 4K size so that,

by default we will get the whole batch aligned one, and then there is no need of book keeping for last update and hence reducing the overhead of

different calculations.

we are padding individual updates to reduce overhead of book keeping things around last update in a batch,
by padding each updates to 4k, we will be having a batch of updates which is 4k aligned itself.

* 4091910 (Tracking ID: 4090321)

SYMPTOM:
vxvm-boot service startup failure

DESCRIPTION:
vxvm-boot service is taking long time to start and getting timed out. With more number of devices device discovery is taking more time to finish.

RESOLUTION:
Increase timeout for service so that discovery gets more time to finish

* 4091911 (Tracking ID: 4090192)

SYMPTOM:
vxvm-boot service startup failure

DESCRIPTION:
vxvm-boot service is taking long time to start and getting timed out. With more number of devices device discovery is taking more time to finish.

RESOLUTION:
Increase device discovery threads to range of 128 to 256 depending on CPUs available on system

* 4091912 (Tracking ID: 4090234)

SYMPTOM:
vxvm-boot service is taking long time to start and getting timed out in large LUNs setups.

DESCRIPTION:
Device discovery layer and infiniband devices(default 120s) are taking long time to discover
the devices which is cause for Volume Manager service timeout. 
Messages logged:
Jul 28 19:52:52 nb-appliance vxvm-boot[17711]: VxVM general startup...
Jul 28 19:57:51 nb-appliance systemd[1]: vxvm-boot.service: start operation timed out. Terminating.
Jul 28 19:57:51 nb-appliance vxvm-boot[17711]: Terminated
Jul 28 19:57:51 nb-appliance systemd[1]: vxvm-boot.service: Control process exited, code=exited status=100
Jul 28 19:59:22 nb-appliance systemd[1]: vxvm-boot.service: State 'stop-final-sigterm' timed out. Killing.
Jul 28 19:59:23 nb-appliance systemd[1]: vxvm-boot.service: Killing process 209714 (vxconfigd) with signal SIGKILL.
Jul 28 20:00:30 nb-appliance systemd[1]: vxvm-boot.service: Failed with result 'timeout'.
Jul 28 20:00:30 nb-appliance systemd[1]: Failed to start VERITAS Volume Manager Boot service.

RESOLUTION:
Completed required changes to fix this issue.

NBA:
https://jira.community.veritas.com/browse/STESC-7281

Flex:
https://jira.community.veritas.com/browse/FLEX-7003

We are suspecting vxvm-boot service timeout due to multiple issues
1. OS is taking long time to discover devices.
2. We have 120 seconds sleep in vxvm-startup when infiniband devices or controllers are present in setup.

Issue1: 
Issue here is vxvm-boot service is taking long time to start and getting timed out. Main issue lies in the device discovery layer which is taking more time. 
There are suspected issues from OS side as well where we have seen OS is also taking long time to discover devices

http://codereview.engba.veritas.com/r/42003/

Issue2:
Earlier in vxvm-startup, we are sleeping 120 seconds for infiniband devices or controller but now we are sleeping 120 seconds only if infinband devices claimed by ASL.

* 4091963 (Tracking ID: 4067191)

SYMPTOM:
In CVR environment after rebooting Slave node, Master node may panic with below stack:

Call Trace:
dump_stack+0x66/0x8b
panic+0xfe/0x2d7
volrv_free_mu+0xcf/0xd0 [vxio]
vol_ru_free_update+0x81/0x1c0 [vxio]
volilock_release_internal+0x86/0x440 [vxio]
vol_ru_free_updateq+0x35/0x70 [vxio]
vol_rv_write2_done+0x191/0x510 [vxio]
voliod_iohandle+0xca/0x3d0 [vxio]
wake_up_q+0xa0/0xa0
voliod_iohandle+0x3d0/0x3d0 [vxio]
voliod_loop+0xc3/0x330 [vxio]
kthread+0x10d/0x130
kthread_park+0xa0/0xa0
ret_from_fork+0x22/0x40

DESCRIPTION:
As part of CVM Master switch a rvg_recovery is triggered. In this step race
condition can occured between the VVR objects due to which the object value
is not updated properly and can cause panic.

RESOLUTION:
Code changes are done to handle the race condition between VVR objects.

* 4091989 (Tracking ID: 4090930)

SYMPTOM:
Relocation of failed data disk of mirror volume leads to data corruption.

DESCRIPTION:
However with existing volume having another faulted mirror and detached mirror being tracked in data change object (DCO) in detach map. At the same time VxVM relocation daemon when decides to relocate another failed disk of volume. This was expected to be full copy of data. Due to bug in relocation code the relocation operation was allowed even when volume is in DISABLED state. When volume became ENABLED the task to copy the data of new mirror incorrectly used detach map instead of full-sync and thus resulting into data loss for the new mirror.

RESOLUTION:
Code has been changed to block triggering relocation of disks when top-level volume is not in ENABLED state.



Mandatory details/instructions while reporting issues
 
1)	Problem

* 4092002 (Tracking ID: 4081740)

SYMPTOM:
vxdg flush command slow due to too many luns needlessly access /proc/partitions.

DESCRIPTION:
Linux BLOCK_EXT_MAJOR(block major 259) is used as extended devt for block devices. When partition number of one device is more than 15, the partition device gets assigned under major 259 to solve the sd limitations (16 minors per device), by which more partitions are allowed for one sd device. During "vxdg flush", for each lun in the disk group, vxconfigd reads file /proc/partitions line by line through fgets() to find all the partition devices with major number 259, which would cause vxconfigd to respond sluggishly if there are large amount of luns in the disk group.

RESOLUTION:
Code has been changed to remove the needless access on /proc/partitions for the luns without using extended devt.

* 4092838 (Tracking ID: 4101128)

SYMPTOM:
Old VxVM rpm fails to load on RHEL8.7

DESCRIPTION:
The RHEL8.7 is a new OS release and has multiple kernel changes which were making VxVM incompatible with OS kernel version 4.18.0-425.3.1

RESOLUTION:
Required code changes have been done. VxVM module compiled with RHEL 8.7 kernel.

* 4099550 (Tracking ID: 4065145)

SYMPTOM:
During addsec we were unable to processencrypted volume tags for multiple volumes and vsets.
Error we saw:

$ vradmin -g dg2 -encrypted addsec dg2_rvg1 10.210.182.74 10.210.182.75

Error: Duplicate tag name vxvm.attr.enckeytype provided in input.

DESCRIPTION:
The number of tags was not defined and we were processing all the tags at a time instead of processing max number of tags for a volume.

RESOLUTION:
Introduced a number of tags variable depend on the cipher method (CBC/GCM), as well fixed minor code issues.

Patch ID: VRTSaslapm 7.4.2.3500

* 4094664 (Tracking ID: 4093396)

SYMPTOM:
All the PowerStore arrays show the same SN. Customer failed to distinguish them. Because the enclose SN was hardcoded. It should be read from storage.

DESCRIPTION:
Code changes have been made to update enclosure SN correctly.

RESOLUTION:
Code changes to support EMC PowerStore have been done.

* 4101140 (Tracking ID: 4101139)

SYMPTOM:
Support for ASLAPM on RHEL 8.7 kernel

DESCRIPTION:
The RHEL8.7 is new release and hence APM module should be recompiled with new kernel.

RESOLUTION:
Compiled APM with new kernel.

Patch ID: VRTSvxvm-7.4.2.3300

* 4083792 (Tracking ID: 4082799)

SYMPTOM:
A security vulnerability exists in the third-party component libcurl.

DESCRIPTION:
VxVM uses a third-party component named libcurl in which a security vulnerability exists.

RESOLUTION:
VxVM is updated to use a newer version of libcurl in which the security vulnerability has been addressed.

Patch ID: VRTSvxvm-7.4.2.3200

* 4011971 (Tracking ID: 3991668)

SYMPTOM:
In a VVR configuration with secondary logging enabled, data inconsistency is reported after the "No IBC message arrived" error is encountered.

DESCRIPTION:
It might happen that the VVR secondary node handles updates with larger sequence IDs before the In-Band Control (IBC) update arrives. In this case, VVR drops the IBC update. Due to the updates with the larger sequence IDs than the one for the IBC update, data writes cannot be started, and they get queued. Data loss may occur after the VVR secondary receives an atomic commit and frees the queue. If this situation occurs, the "vradmin verifydata" command reports data inconsistency.

RESOLUTION:
VVR is modified to trigger updates as they are received in order to start data volume writes.

* 4013169 (Tracking ID: 4011691)

SYMPTOM:
Observed high CPU consumption on the VVR secondary nodes because of high pending IO load.

DESCRIPTION:
High replication related IO load on the VVR secondary and the requirement of maintaining write order fidelity with limited memory pools created  contention. This resulted in multiple VxVM kernel threads contending for shared resources and there by increasing the CPU consumption.

RESOLUTION:
Limited the way in which VVR consumes its resources so that a high pending IO load would not result into high CPU consumption.

* 4037288 (Tracking ID: 4034857)

SYMPTOM:
Current load of Vxvm modules were failing on SLES15 SP2(Kernel - 5.3.18-22.2-default).

DESCRIPTION:
With new kernel (5.3.18-22.2-default) below mentioned functions were depricated -
1. gettimeofday() 
2.struct timeval
3. bio_segments()
4. iov_for_each()
5.req filed in struct next_rq
Also, there was susceptible Data corruption with big size IO(>1M) processed by Linux kernel IO splitting.

RESOLUTION:
Code changes are mainly to support kernel 5.3.18 and to provide support for deprecated functions. 
Remove dependency on req->next_rq field in blk-mq code
And, changes related to bypassing the Linux kernel IO split functions, which seems redundant for VxVM IO processing.

* 4054311 (Tracking ID: 4040701)

SYMPTOM:
Below warnings are observed while installing the VXVM package.
WARNING: libhbalinux/libhbaapi is not installed. vxesd will not capture SNIA HBA API library events.
mv: '/var/adm/vx/cmdlog' and '/var/log/vx/cmdlog' are the same file
mv: '/var/adm/vx/cmdlog.1' and '/var/log/vx/cmdlog.1' are the same file
mv: '/var/adm/vx/cmdlog.2' and '/var/log/vx/cmdlog.2' are the same file
mv: '/var/adm/vx/cmdlog.3' and '/var/log/vx/cmdlog.3' are the same file
mv: '/var/adm/vx/cmdlog.4' and '/var/log/vx/cmdlog.4' are the same file
mv: '/var/adm/vx/ddl.log' and '/var/log/vx/ddl.log' are the same file
mv: '/var/adm/vx/ddl.log.0' and '/var/log/vx/ddl.log.0' are the same file
mv: '/var/adm/vx/ddl.log.1' and '/var/log/vx/ddl.log.1' are the same file
mv: '/var/adm/vx/ddl.log.10' and '/var/log/vx/ddl.log.10' are the same file
mv: '/var/adm/vx/ddl.log.11' and '/var/log/vx/ddl.log.11' are the same file

DESCRIPTION:
Some warnings are observed while installing vxvm package.

RESOLUTION:
Appropriate code changes are done to avoid the warnings.

* 4056919 (Tracking ID: 4056917)

SYMPTOM:
In Flexible Storage Sharing (FSS) environments, disk group import operation with few disks missing leads to data corruption.

DESCRIPTION:
In FSS environments, import of disk group with missing disks is not allowed. If disk with highest updated configuration information is not present during import, the import operation fired was leading incorrectly incrementing the config TID on remaining disks before failing the operation. When missing disk(s) with latest configuration came back, import was successful. But because of earlier failed transaction, import operation incorrectly choose wrong configuration to import the diskgroup leading to data corruption.

RESOLUTION:
Code logic in disk group import operation is modified to ensure failed/missing disks check happens early before attempting perform any on-disk update as part of import.

* 4058873 (Tracking ID: 4057526)

SYMPTOM:
Whenever vxnm-vxnetd is loaded, it reports "Cannot touch '/var/lock/subsys/vxnm-vxnetd': No such file or directory" in /var/log/messages.

DESCRIPTION:
New systemd update removed the support for "/var/lock/subsys/" directory. Thus, whenever vxnm-vxnetd is loaded on the systems supporting systemd, it 
reports "cannot touch '/var/lock/subsys/vxnm-vxnetd': No such file or directory"

RESOLUTION:
Added a check to validate if the /var/lock/subsys/ directory is supported in vxnm-vxnetd.sh

* 4060839 (Tracking ID: 3975667)

SYMPTOM:
NMI watchdog: BUG: soft lockup

DESCRIPTION:
When flow control on ioshipping channel is set there is window in code where vol_ioship_sender thread can go in tight loop.
This causes softlockup

RESOLUTION:
Relinquish CPU to schedule other process. vol_ioship_sender() thread will restart after some delay.

* 4060962 (Tracking ID: 3915202)

SYMPTOM:
vxconfigd hang in vxconfigd -k -r reset

DESCRIPTION:
vxconfigd hang is observed since all the file descriptors to the process have been utilized because of fd leak.
This issue was not integrated hence facing the issue.

RESOLUTION:
Appropriate code changes are done to handle scenario of the fd leak.

* 4060966 (Tracking ID: 3959716)

SYMPTOM:
System may panic with sync replication with VVR configuration, when VVR RVG is in DCM mode, with following panic stack:
volsync_wait [vxio]
voliod_iohandle [vxio]
volted_getpinfo [vxio]
voliod_loop [vxio]
voliod_kiohandle [vxio]
kthread

DESCRIPTION:
With sync replication, if ACK for data message is delayed from the secondary site, the 
primary site might incorrectly free the message from the waiting queue at primary site.
Due to incorrect handling of the message, a system panic may happen.

RESOLUTION:
Required code changes are done to resolve the panic issue.

* 4061004 (Tracking ID: 3993242)

SYMPTOM:
vxsnap prepare on vset might throw error : "VxVM vxsnap ERROR V-5-1-19171 Cannot perform prepare operation on cloud 
volume"

DESCRIPTION:
There were  some wrong volume-records entries being fetched for VSET and due to which required validations were failing and triggering the issue .

RESOLUTION:
Code changes have been done to resolve the issue .

* 4061036 (Tracking ID: 4031064)

SYMPTOM:
During master switch with replication in progress, cluster wide hang is seen on VVR secondary.

DESCRIPTION:
With application running on primary, and replication setup between VVR primary & secondary, when master switch operation is attempted on secondary, it gets hung permanently.

RESOLUTION:
Appropriate code changes are done to handle scenario of master switch operation and replication data on secondary.

* 4061055 (Tracking ID: 3999073)

SYMPTOM:
Data corruption occurred when the fast mirror resync (FMR) was enabled and the failed plex of striped-mirror layout was attached.

DESCRIPTION:
To determine and recover the regions of volumes using contents of detach, a plex attach operation with FMR tracking has been enabled.

For the given volume region, the DCO region size being higher than the stripe-unit of volume, the code logic in plex attached code path was incorrectly skipping the bits in detach maps. Thus, some of the regions (offset-len) of volume did not sync with the attached plex leading to inconsistent mirror contents.

RESOLUTION:
To resolve the data corruption issue, the code has been modified to consider all the bits for given region (offset-len) in plex attached code.

* 4061057 (Tracking ID: 3931583)

SYMPTOM:
Node may panic while uninstalling or upgrading the VxVM package or during reboot.

DESCRIPTION:
Due to a race condition in Volume Manager (VxVM), IO may be queued for processing while the vxio module is being unloaded. This results in VxVM acquiring and accessing a lock which is currently being freed and it may panic the system with the following backtrace:

 #0 [ffff88203da089f0] machine_kexec at ffffffff8105d87b
 #1 [ffff88203da08a50] __crash_kexec at ffffffff811086b2
 #2 [ffff88203da08b20] panic at ffffffff816a8665
 #3 [ffff88203da08ba0] nmi_panic at ffffffff8108ab2f
 #4 [ffff88203da08bb0] watchdog_overflow_callback at ffffffff81133885
 #5 [ffff88203da08bc8] __perf_event_overflow at ffffffff811727d7
 #6 [ffff88203da08c00] perf_event_overflow at ffffffff8117b424
 #7 [ffff88203da08c10] intel_pmu_handle_irq at ffffffff8100a078
 #8 [ffff88203da08e38] perf_event_nmi_handler at ffffffff816b7031
 #9 [ffff88203da08e58] nmi_handle at ffffffff816b88ec
#10 [ffff88203da08eb0] do_nmi at ffffffff816b8b1d
#11 [ffff88203da08ef0] end_repeat_nmi at ffffffff816b7d79
 [exception RIP: _raw_spin_unlock_irqrestore+21]
 RIP: ffffffff816b6575 RSP: ffff88203da03d98 RFLAGS: 00000283
 RAX: 0000000000000283 RBX: ffff882013f63000 RCX: 0000000000000080
 RDX: 0000000000000001 RSI: 0000000000000283 RDI: 0000000000000283
 RBP: ffff88203da03d98 R8: 00000000005d1cec R9: ffff8810e8ec0000
 R10: 0000000000000002 R11: ffff88203da03da8 R12: ffff88103af95560
 R13: ffff882013f630c8 R14: 0000000000000001 R15: 0000000000000ca5
 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
--- <NMI exception stack> ---
#12 [ffff88203da03d98] _raw_spin_unlock_irqrestore at ffffffff816b6575
#13 [ffff88203da03da0] voliod_qsio at ffffffffc0fd14c3 [vxio]
#14 [ffff88203da03dd0] vol_sample_timeout at ffffffffc101d8df [vxio]
#15 [ffff88203da03df0] __voluntimeout at ffffffffc0fd34be [vxio]
#16 [ffff88203da03e18] voltimercallback at ffffffffc0fd3568 [vxio]
...
...

RESOLUTION:
Code changes made to handle the race condition and prevent the access of resources that are being freed.

* 4061298 (Tracking ID: 3982103)

SYMPTOM:
When the memory available is low in the system , I/O hang is seen.

DESCRIPTION:
In low memory situation, the memory allocated to some VVR IOs was NOT getting released properly due to which the new application IO
could NOT be served as the VVR memory pool gets fully utilized. This was resulting in IO hang type of situation.

RESOLUTION:
Code changes are done to properly release the memory in the low memory situation.

* 4061317 (Tracking ID: 3925277)

SYMPTOM:
vxdisk resize corrupts disk public region and causes file system mount fail.

DESCRIPTION:
While resizing single path disk with GPT label, update policy data according to the changes made to da/dmrec during two transactions of resize is missed, hence the private region IOs are sent to the old private region device which is on partition 3. This may make the private region data written to public region and cause corruption.

RESOLUTION:
Code changes have been made to fix  the problem.

* 4061509 (Tracking ID: 4043337)

SYMPTOM:
rp_rv.log file uses space for logging.

DESCRIPTION:
rp_rv log files needs to be removed and logger file should have 16 mb rotational log files.

RESOLUTION:
The code changes are implemented to disabel logging for rp_rv.log files

* 4062461 (Tracking ID: 4066785)

SYMPTOM:
When the replicated disks are in SPLIT mode, importing its disk group failed with "Device is a hardware mirror".

DESCRIPTION:
When the replicated disks are in SPLIT mode, which are readable and writable, importing its disk group failed with "Device is a hardware mirror". Third party doesn't expose disk attribute to show when it's in SPLIT mode. With this new enhancement, the replicated disk group can be imported with option `-o usereplicatedev=only`.

RESOLUTION:
The code is enhanced to import the replicated disk group with option `-o usereplicatedev=only`.

* 4062577 (Tracking ID: 4062576)

SYMPTOM:
When hastop -local is used to stop the cluster, dg deport command hangs. Below stack trace is observed in system logs :

#0 [ffffa53683bf7b30] __schedule at ffffffffa834a38d
 #1 [ffffa53683bf7bc0] schedule at ffffffffa834a868
 #2 [ffffa53683bf7bd0] blk_mq_freeze_queue_wait at ffffffffa7e4d4e6
 #3 [ffffa53683bf7c18] blk_cleanup_queue at ffffffffa7e433b8
 #4 [ffffa53683bf7c30] vxvm_put_gendisk at ffffffffc3450c6b [vxio]   
 #5 [ffffa53683bf7c50] volsys_unset_device at ffffffffc3450e9d [vxio]
 #6 [ffffa53683bf7c60] vol_rmgroup_devices at ffffffffc3491a6b [vxio]
 #7 [ffffa53683bf7c98] voldg_delete at ffffffffc34932fc [vxio]
 #8 [ffffa53683bf7cd8] vol_delete_group at ffffffffc3494d0d [vxio]
 #9 [ffffa53683bf7d18] volconfig_ioctl at ffffffffc3555b8e [vxio]
#10 [ffffa53683bf7d90] volsioctl_real at ffffffffc355fc8a [vxio]
#11 [ffffa53683bf7e60] vols_ioctl at ffffffffc124542d [vxspec]
#12 [ffffa53683bf7e78] vols_unlocked_ioctl at ffffffffc124547d [vxspec]
#13 [ffffa53683bf7e80] do_vfs_ioctl at ffffffffa7d2deb4
#14 [ffffa53683bf7ef8] ksys_ioctl at ffffffffa7d2e4f0
#15 [ffffa53683bf7f30] __x64_sys_ioctl at ffffffffa7d2e536

DESCRIPTION:
This issue is seen due to some updation from kernel side w.r.t to handling request queue.Existing VxVM code set the request handling area (make_request_fn) as vxvm_gen_strategy, this functionality is getting impacted.

RESOLUTION:
Code changes are added to handle the request queues using blk_mq_init_allocated_queue.

* 4062746 (Tracking ID: 3992053)

SYMPTOM:
Data corruption may happen with layered volumes due to some data not re-synced while attaching a plex. This is due to 
inconsistent data across the plexes after attaching a plex in layered volumes.

DESCRIPTION:
When a plex is detached in a layered volume, the regions which are dirty/modified are tracked in DCO (Data change object) map.
When the plex is attached back, the data corresponding to these dirty regions is re-synced to the plex being attached.
There was a defect in the code due to which the some particular regions were NOT re-synced when a plex is attached.
This issue only happens only when the offset of the sub-volume is NOT aligned with the region size of DCO (Data change object) volume.

RESOLUTION:
The code defect is fixed to correctly copy the data for dirty regions when the sub-volume offset is NOT aligned with the DCO region size.

* 4062747 (Tracking ID: 3943707)

SYMPTOM:
vxconfigd reconfig hang when joing a cluster with below stack:
volsync_wait [vxio]
_vol_syncwait [vxio]
voldco_await_shared_tocflush [vxio]
volcvm_ktrans_fmr_cleanup [vxio]
vol_ktrans_commit [vxio]
volconfig_ioctl [vxio]
volsioctl_real [vxio]
vols_ioctl [vxspec]
vols_unlocked_ioctl [vxspec]
vfs_ioctl  
do_vfs_ioctl

DESCRIPTION:
There is a race condition that caused the current seqno on tocsio does not get incremented on one of the nodes. While master and other slaves move to next stage with higher seqno, this slave drops the DISTRIBUTE message. The messages is retried from master and slave keeps on dropping, leading to hang.

RESOLUTION:
Code changes have been made to avoid the race condition.

* 4062751 (Tracking ID: 3989185)

SYMPTOM:
In a Veritas Volume Manager(VVR) environment vxrecover command can hang.

DESCRIPTION:
When vxrecover is triggered after storage failure it is possible that the vxrecover operation may hang.
This is because vxrecover does the RVG recovery. As part of this recovery dummy updates are written on SRL.
Due to a bug in the code these updated were written incorrectly on the SRL which led the flush operation from SRL to data volume hang.

RESOLUTION:
Code changes are done appropriately so that the dummy updates are written  correctly to the SRL.

* 4062755 (Tracking ID: 3978453)

SYMPTOM:
Reconfig hang during master takeover with below stack:
volsync_wait+0xa7/0xf0 [vxio]
volsiowait+0xcb/0x110 [vxio]
vol_commit_iolock_objects+0xd3/0x270 [vxio]
vol_ktrans_commit+0x5d3/0x8f0 [vxio]
volconfig_ioctl+0x6ba/0x970 [vxio]
volsioctl_real+0x436/0x510 [vxio]
vols_ioctl+0x62/0xb0 [vxspec]
vols_unlocked_ioctl+0x21/0x30 [vxspec]
do_vfs_ioctl+0x3a0/0x5a0

DESCRIPTION:
There is a hang in dcotoc protocol on slave and that is causing couple of slave nodes not respond with LEAVE_DONE to master, hence the issue.

RESOLUTION:
Code changes have been made to add handling of transaction overlapping with a shared toc update. Passing toc update sio flag from old to new object during transaction, to resume recovery if required.

* 4063374 (Tracking ID: 4005121)

SYMPTOM:
Application IOs appear hung or progress slowly until SRL to DCM flush finished.

DESCRIPTION:
When VVR SRL gets full DCM protection was triggered and application IO appear hung until SRL to DCM flush finished.

RESOLUTION:
Added fix that avoided duplicate DCM tracking through vol_rvdcm_log_update(), which reduced the IOPS drop comparatively.

* 4064523 (Tracking ID: 4049082)

SYMPTOM:
I/O read error is displayed when remote FSS node rebooting.

DESCRIPTION:
When rebooting remote FSS node, I/O read requests to a mirror volume that is scheduled on the remote disk from the FSS node should be redirected to the remaining plex. However, current vxvm does not handle this correctly. The retrying I/O requests could still be sent to the offline remote disk, which cause to final I/O read failure.

RESOLUTION:
Code changes have been done to schedule the retrying read request on the remaining plex.

* 4066930 (Tracking ID: 3951527)

SYMPTOM:
Data loss issue is seen because of incorrect version check handling done as a part of SRL 4k update alignment changes in 7.4 release.

DESCRIPTION:
On primary, rv_target_rlink field always is set to NULL which internally skips checking the 4k version  in VOL_RU_INIT_UPDATE macro. It causes SRL writes to be written in a 4k aligned manner even though remote rvg version is <= 7.3.1. This resulted in data loss.

RESOLUTION:
Changes are done to use rv_replicas rather than rv_target_rlink to check the version appropriately for all sites and not write SRL IO's in 4k aligned manner. 
Also, RVG version is not upgraded as part of diskgroup upgrades if rlinks are in attached state. RVG version can be upgraded using vxrvg upgrade command after detaching the rlinks and also when all sites are upgraded.

* 4067706 (Tracking ID: 4060462)

SYMPTOM:
System is unresponsive while adding new nodes.

DESCRIPTION:
After a node is removed, and adding node with  different node name is attempted; system turns
unresponsive. When a node leaves a cluster, in-memory information related to the node is not cleared due to the race condition.

RESOLUTION:
Fixed race condition to clear in-memory information of the node that leaves the cluster.

* 4067710 (Tracking ID: 4064208)

SYMPTOM:
Node is unresponsive while it gets added to the cluster.

DESCRIPTION:
While a node joins the cluster, if bits on the node are upgraded; size
of the object is interpreted incorrectly. Issue is observed when number of objects is higher and on
InfoScale 7.3.1 and above.

RESOLUTION:
Correct sizes are calculated for the data received from the master node.

* 4067712 (Tracking ID: 3868140)

SYMPTOM:
VVR primary site node might panic if the rlink disconnects while some data is getting replicated to secondary with below stack: 

dump_stack()
panic()
vol_rv_service_message_start()
update_curr()
put_prev_entity()
voliod_iohandle()
voliod_loop()
voliod_iohandle()

DESCRIPTION:
If rlink disconnects, VVR will clear some handles to the in-progress updates in memory, but if some IOs are still getting acknowledged from secondary to primary, then accessing updates for these IOs might result in panic at primary node.

RESOLUTION:
Code fix is implemented to correctly access the primary node updates in order to avoid the panic.

* 4067713 (Tracking ID: 3997531)

SYMPTOM:
VVR replication is not working, as vxnetd does not start properly.

DESCRIPTION:
If vxnetd restarts, a race condition blocks the completion of vxnetd start function after the shutdown process is completed.

RESOLUTION:
To avoid the race condition, the vxnetd start and stop functions are Synchronized.

* 4067715 (Tracking ID: 4008740)

SYMPTOM:
System panic

DESCRIPTION:
Due to a race condition there was code accessing freed VVR update which resulted in system panic

RESOLUTION:
Fixed race condition to avoid incorrect memory access

* 4067717 (Tracking ID: 4009151)

SYMPTOM:
Auto-import of diskgroup on system reboot fails with error:
"Disk for diskgroup not found"

DESCRIPTION:
When diskgroup is auto-imported, VxVM (Veritas Volume Manager) tries to find the disk with latest configuration copy. During this the DG import process searches through all the disks. The procedure also tries to find out if the DG contains clone disks or standard disks. While doing this calculation the DG import process incorrectly determines that current DG contains cloned disks instead of standard disks because of the stale value being there for the previous DG selected. Since VxVM incorrectly decides to import cloned disks instead of standard disks the import fails with "Disk for diskgroup not found" error.

RESOLUTION:
Code has been modified to accurately determine whether the DG contains standard or cloned disks and accordingly use those disks for DG import.

* 4067914 (Tracking ID: 4037757)

SYMPTOM:
VVR services always get started on boot up even if VVR is not being used.

DESCRIPTION:
VVR services get auto start as they are integrated in system init.d or similar framework.

RESOLUTION:
Added a tunable to not start VVR services on boot up

* 4067915 (Tracking ID: 4059134)

SYMPTOM:
Resync task takes too long on large size raid-5 volume

DESCRIPTION:
The resync of raid-5 volume will be done by small regions, and a check point will be setup for each region. If the size of raid-5 volume is large, it will be divided to large number of regions for resync, and check point setup will be issued against each region in loop. In each cycle, resync utility will open and connect vxconfigd daemon to do that,  each client would be created in vxconfigds context along with each region. As the number of created clients is large, it will take long time for vxconfigd which need to traverse the client list, thus, introduce the performance issue for resync.

RESOLUTION:
Code changes are made so that only one client created during the whole resync process, few time spent in client list traversing.

* 4069522 (Tracking ID: 4043276)

SYMPTOM:
If admin has offlined disks with "vxdisk offline <disk_name>" then vxattachd may brings the disk back to online state.

DESCRIPTION:
The "offline" state of VxVM disks is not stored persistently, it is recommended to use "vxdisk define" to persistently offline a disk.
For Veritas Netbackup Appliance there is a requirement that vxattachd shouldn't online the disks offlined with "vxdisk offline" operation.
To cater this request we have added tunable based enhancement to vxattachd for Netbackup Appliance use case.
The enhancement are done specifically so that Netback Appliance script can use it.
Following are the tunable details.
If skip_offline tunable is set then it will avoid offlined disk into online state. 
If handle_invalid_disk is set then it will offlined the "online invalid" SAN disks.
If remove_disable_dmpnode is set then it will cleanup stale entries from disk.info file and VxVM layer.
By default these tunables are off, we DONOT recommend InfoScale users to enable these vxattachd tunables.

RESOLUTION:
Code changes are done in vxattachd to cater Netbackup Appliance usecases.

* 4069523 (Tracking ID: 4056751)

SYMPTOM:
When importing a disk group containing all cloned disks with cloneoff option(-c) and some of disks are in read only status, the import fails and some of writable disks are removed from the disk group unexpectedly.

DESCRIPTION:
During disk group import with cloneoff option, a flag DA_VFLAG_ASSOC_DG gets set as update dgid is necessary. When associating da record of the read only disks, update private region TOC failed because of write failure, so the pending associations get aborted for all disks. During the aborting, for those of disks containing flag DA_VFLAG_ASSOC_DG would be removed from the dg and offline their config copy. Hence we can see a kind of private region corruption on writeable disks, actually they were removed from the dg.

RESOLUTION:
The issue has been fixed by failing the import at early stage if some of disks are read-only.

* 4069524 (Tracking ID: 4056954)

SYMPTOM:
When performing addsec using the VIPs with SSL enable the hang is observed

DESCRIPTION:
the issues comes when on primary side,  vradmin tries to create a local socket with endpoints as Local VIP & Interface IP and ends up calling SSL_accept and gets stuck infinitely.

RESOLUTION:
Appropriate code changes are done to handle scenario of vvr_islocalip() function to identify if the ip is local to the node.
So now by using the vvr_islocalip() the SSL_accept() func get called only if the ip is remote ip

* 4070099 (Tracking ID: 3159650)

SYMPTOM:
vxtune did not support vol_vvr_use_nat.

DESCRIPTION:
Platform specific methods were required to set vol_vvr_use_nat tunable, as its support for vxtune command was not present.

RESOLUTION:
Added vol_vvr_use_nat support for vxtune command.

* 4070253 (Tracking ID: 3911930)

SYMPTOM:
Valid PGR operations sometimes fail on a DMP node.

DESCRIPTION:
As part of the PGR operations, if the inquiry command finds that PGR is not
supported on the DMP node, the PGR_FLAG_NOTSUPPORTED flag is set on the node. Further PGR operations check this value and issue PGR commands only if the flag is not set. PGR_FLAG_NOTSUPPORTED remains set even if the hardware is changed so as to support PGR.

RESOLUTION:
A new command, enablepr, is provided in the vxdmppr utility to clear this flag on the specified DMP node.

* 4071131 (Tracking ID: 4071605)

SYMPTOM:
A security vulnerability exists in the third-party component libxml2.

DESCRIPTION:
VxVM uses a third-party component named libxml2 in which a security vulnerability exists.

RESOLUTION:
VxVM is updated to use a newer version of libxml2 in which the security vulnerability has been addressed.

* 4072874 (Tracking ID: 4046786)

SYMPTOM:
During reboot , nodes go out of cluster and FS is not mounted .

DESCRIPTION:
NVMe asl can some time give different UDID (difference with actual UDID would be absence of space characters in UDID) during discovery.

RESOLUTION:
usage of nvme ioctl to fetch data has been removed and sysfs will be used instead

Patch ID: VRTSaslapm 7.4.2.3200

* 4070186 (Tracking ID: 4041822)

SYMPTOM:
In an SRDF/Metro array setup, the last path is in the enabled state even after all the host and the array-side switch ports are disabled.

DESCRIPTION:
In case of an SRDF/Metro array setup, if the path connectivity is disrupted, one path may still appear to be in the enabled state until the connectivity is restored. For example: # vxdmpadm getsubpaths dmpnodename=emc0_02e0 NAME STATE[A] PATH-TYPE[M] CTLR-NAME ENCLR-TYPE ENCLR-NAME ATTRS PRIORITY ======================================================================================================= c7t50000975B00AD80Ad9s2 DISABLED - c7 EMC emc0 - - c7t50000975B00AD84Ad9s2 DISABLED - c7 EMC emc0 - - c7t50000975B00AF40Ad70s2 DISABLED - c7 EMC emc0 - - c7t50000975B00AF44Ad70s2 DISABLED - c7 EMC emc0 - - c8t50000975B00AD80Ad9s2 DISABLED - c8 EMC emc0 - - c8t50000975B00AD84Ad9s2 DISABLED - c8 EMC emc0 - - c8t50000975B00AF40Ad70s2 ENABLED(A) - c8 EMC emc0 - - c8t50000975B00AF44Ad70s2 DISABLED - c8 EMC emc0 - - Note: This situation does not occur if I/Os are in progress through this DMP node. DMP identifies the disruption in the connectivity and correctly updates the state of the path.

RESOLUTION:
Made code changes to fixed this issue, To refresh the state of the paths sooner, run the 'vxdisk scandisks' command.

Patch ID: VRTSvxvm-7.4.2.2400

* 4018181 (Tracking ID: 3995474)

SYMPTOM:
The following IO errors are reported on VxVM sub-disks result in DRL log detached on SLES12SP3 without any SCSI errors detected.

VxVM vxio V-5-0-1276 error on Subdisk [xxxx] while writing volume [yyyy][log] offset 0 length [zzzz]
VxVM vxio V-5-0-145 DRL volume yyyy[log] is detached

DESCRIPTION:
Following the Linux kernel changes since 4.4.68(SLES12SP3), VxVM stores the bio flags, including B_ERROR, to bi_flags_ext field from bi_flags, as bi_flags was reduced from long to short. As bi_flags_ext is a kind of hacking by modifying bio struct, it may take unknown problems. Checking bi_error instead as the

RESOLUTION:
Code changes have been made in the VxIO Disk IO done routine to fix the issue.

* 4051701 (Tracking ID: 4031597)

SYMPTOM:
vradmind generates a core dump in __strncpy_sse2_unaligned.

DESCRIPTION:
The following core dump is generated:
(gdb)bt
Thread 1 (Thread 0x7fcd140b2780 (LWP 90066)):
#0 0x00007fcd12b1d1a5 in __strncpy_sse2_unaligned () from /lib64/libc.so.6
#1 0x000000000059102e in IpmServer::accept (this=0xf21168, new_handlesp=0x0) at Ipm.C:3406
#2 0x0000000000589121 in IpmHandle::events (handlesp=0xf12088, new_eventspp=0x7ffc8e80a4e0, serversp=0xf120c8, new_handlespp=0x0, ms=100) at Ipm.C:613
#3 0x000000000058940b in IpmHandle::events (handlesp=0xfc8ab8, vlistsp=0xfc8938, ms=100) at Ipm.C:645
#4 0x000000000040ae2a in main (argc=1, argv=0x7ffc8e80e8e8) at srvmd.C:722

RESOLUTION:
vradmind is updated to properly handle getpeername(), which addresses this issue.

* 4051702 (Tracking ID: 4019182)

SYMPTOM:
In case of a VxDMP configuration, an InfoScale server panics when applying a patch. The following stack trace is generated:
unix:panicsys+0x40()
unix:vpanic_common+0x78()
unix:panic+0x1c()
unix:mutex_enter() - frame recycled
vxdmp(unloaded text):0x108b987c(jmpl?)()
vxdmp(unloaded text):0x108ab380(jmpl?)(0)
genunix:callout_list_expire+0x5c()
genunix:callout_expire+0x34()
genunix:callout_execute+0x10()
genunix:taskq_thread+0x42c()
unix:thread_start+4()

DESCRIPTION:
Some VxDMP functions create callouts. The VxDMP module may already be unloaded when a callout expires, which may cause the server to panic. VxDMP should cancel any previous timeout function calls before it unloads itself.

RESOLUTION:
VxDMP is updated to cancel any previous timeout function calls before unloading itself.

* 4051705 (Tracking ID: 4049371)

SYMPTOM:
DMP unable to display all WWN details when running "vxdmpadm getctlr all".

DESCRIPTION:
When udev discovers any sd device, vxvm will remove the old HBA info file and create a new one. During this period, vxesd could fail to obtain the HBA information.

RESOLUTION:
Code changes have been done to aviod missing the HBA info.

* 4051706 (Tracking ID: 4046007)

SYMPTOM:
disk private region gets corrupted after cluster name change in FSS environment.

DESCRIPTION:
Under some conditions, when vxconfigd tries to update TOC(table of contents) blocks of disk private region, the allocation maps may not be initialized in memory yet. This could make allocation maps incorrect and lead to corruption of disk private region.

RESOLUTION:
Code changes have been done to avoid corruption of disk private region.

* 4053228 (Tracking ID: 4053230)

SYMPTOM:
RHEL 8.5 support is to be provided with IS 7.4.1 and 7.4.2

DESCRIPTION:
RHEL 8.5 ZDS support is being provided with IS 7.4.1 and 7.4.2

RESOLUTION:
VxVM packages are available with RHEL 8.5 compatibility

* 4055211 (Tracking ID: 4052191)

SYMPTOM:
Any scripts or command files in the / directory may run unexpectedly at system startup.
and vxvm volumes will not be available until those scripts or commands are complete.

DESCRIPTION:
If this issue occurs, /var/svc/log/system-vxvm-vxvm-configure:default.log indicates that a script or command
located in the / directory has been executed.
example-
ABC Script ran!!
/lib/svc/method/vxvm-configure[241] abc.sh not found
/lib/svc/method/vxvm-configure[242] abc.sh not found
/lib/svc/method/vxvm-configure[243] abc.sh not found
/lib/svc/method/vxvm-configure[244] app/ cannot execute
In this example, abc.sh is located in the / directory and just echoes "ABC script ran !!". vxvm-configure launched abc.sh.

RESOLUTION:
Issue got fixed by changing the comments format in SunOS_5.11.vxvm-configure.sh script.

Patch ID: VRTSaslapm 7.4.2.2400

* 4053232 (Tracking ID: 4053233)

SYMPTOM:
RHEL 8.5 support is to be provided with IS 7.4.1 and 7.4.2

DESCRIPTION:
RHEL 8.5 ZDS support is being provided with IS 7.4.1 and 7.4.2

RESOLUTION:
ASL-APM packages are available with RHEL 8.5 compatibility

Patch ID: VRTSvxvm-7.4.2.2200

* 4018173 (Tracking ID: 3852146)

SYMPTOM:
In a CVM cluster, when importing a shared diskgroup specifying both -c and -o
noreonline options, the following error may be returned: 
VxVM vxdg ERROR V-5-1-10978 Disk group <dgname>: import failed: Disk for disk
group not found.

DESCRIPTION:
The -c option will update the disk ID and disk group ID on the private region
of the disks in the disk group being imported. Such updated information is not
yet seen by the slave because the disks have not been re-onlined (given that
noreonline option is specified). As a result, the slave cannot identify the
disk(s) based on the updated information sent from the master, causing the
import to fail with the error Disk for disk group not found.

RESOLUTION:
The code is modified to handle the working of the "-c" and "-o noreonline"
options together.

* 4018178 (Tracking ID: 3906534)

SYMPTOM:
After enabling DMP (Dynamic Multipathing) Native support, enable /boot to be
mounted on DMP device.

DESCRIPTION:
Currently /boot is mounted on top of OS (Operating System) device. When DMP
Native support is enabled, only VG's (Volume Groups) are migrated from OS 
device to DMP device.This is the reason /boot is not migrated to DMP device.
With this if OS device path is not available then system becomes unbootable 
since /boot is not available. Thus it becomes necessary to mount /boot on DMP
device to provide multipathing and resiliency.

RESOLUTION:
Code changes have been done to migrate /boot on top of DMP device when DMP
Native support is enabled.
Note - The code changes are currently implemented for RHEL-6 only. For other
linux platforms, /boot will still not be mounted on the DMP device

* 4031342 (Tracking ID: 4031452)

SYMPTOM:
Add node operation is failing with error "Error found while invoking '' in the new node, and rollback done in both nodes"

DESCRIPTION:
Stack showed a valid address for pointer ptmap2, but still it generated core.
It suggested that it might be a double-free case. Issue lies in freeing a pointer

RESOLUTION:
Added handling for such case by doing NULL assignment to pointers wherever they are freed

* 4037283 (Tracking ID: 4021301)

SYMPTOM:
Data corruption issue happened with the big size IO processed by Linux kernel IO split on RHEL8.

DESCRIPTION:
On RHEL8 or as of Linux kernel 3.13, it introduces some changes in Linux kernel block layer, new item of the bio iterator structure is used to represent the start offset of bio or bio vectors after the IO processed by Linux kernel IO split functions. Also, in recent version of vxfs, it can generate bio with larger size than the size limitation defined within Linux kernel block layer and VxVM, which lead the IO from vxfs could be split by Linux kernel. For such split IOs, VxVM does not take the new item of the bio iterator into account while process them, which caused the data is written to wrong position of volume/disk. Hence, data corruption.

RESOLUTION:
Code changes have been made to bypass the Linux kernel IO split functions, which seems redundant for VxVM IO processing.

* 4042038 (Tracking ID: 4040897)

SYMPTOM:
This is new array and we need to add support for claiming HPE MSA 2060 arrays.

DESCRIPTION:
HPE MSA 2060 is new array and current ASL doesn't support it. So it will not be claimed with current ASL. This array support has been now added in the current ASL.

RESOLUTION:
Code changes to support HPE MSA 2060 array have been done.

* 4046906 (Tracking ID: 3956607)

SYMPTOM:
When removing a VxVM disk using vxdg-rmdisk operation, the following error occurs requesting a disk reclaim.
VxVM vxdg ERROR V-5-1-0 Disk <device_name> is used by one or more subdisks which are pending to be reclaimed.
Use "vxdisk reclaim <device_name>" to reclaim space used by these subdisks, and retry "vxdg rmdisk" command.
Note: reclamation is irreversible. But when issuing vxdisk-reclaim as advised, the command dumps core.

DESCRIPTION:
In the disk-reclaim code path, memory allocation can fail at realloc() but the failure 
not detected, causing an invalid address to be referenced and a core dump results.

RESOLUTION:
The disk-reclaim code path now handles failure of realloc properly.

* 4046907 (Tracking ID: 4041001)

SYMPTOM:
When some nodes are rebooted in the system, nodes cannot join back as disk attach transactions are not
happening.

DESCRIPTION:
In VxVM, when some nodes are rebooted, some plexes of volume are detached. It may happen that all plexes
of volume are disabled. In this case, if all plexes of some DCO volume become inaccessible, that DCO
volume state should be marked as BADLOG.

If state is not marked BADLOG, transactions fail with following error.
VxVM ERROR V-5-1-10128  DCO experienced IO errors during the operation. Re-run the operation after ensuring that DCO is accessible

As the transactions are failing, system goes in hang state and nodes cannot join.

RESOLUTION:
The code is fixed to mark DCO state as BADLOG when all the plexes of DCO becomes inaccessible during IO load.

* 4046908 (Tracking ID: 4038865)

SYMPTOM:
System panick at vxdmp module with following calltrace in IRQ stack.
native_queued_spin_lock_slowpath
queued_spin_lock_slowpath
_raw_spin_lock_irqsave7
dmp_get_shared_lock
gendmpiodone
dmpiodone
bio_endio
blk_update_request
scsi_end_request
scsi_io_completion
scsi_finish_command
scsi_softirq_done
blk_done_softirq
__do_softirq
call_softirq
do_softirq
irq_exit
do_IRQ
 <IRQ stack>

DESCRIPTION:
A deadlock issue can happen between inode_hash_lock and DMP shared lock, when one process holding inode_hash_lock but acquires the DMP shared lock in IRQ context, in the mean time other process holding the DMP shared lock may acquire inode_hash_lock.

RESOLUTION:
Code changes have been done to avoid the deadlock issue.

* 4047588 (Tracking ID: 4044072)

SYMPTOM:
I/Os fail for NVMe disks with 4K block size on the RHEL 8.4 kernel.

DESCRIPTION:
This issue occurs only in the case of disks of the 4K block size. I/Os complete successfully when the disks of 512 block size are used. If disks of the 4K block size are used, the following error messages are logged:
[ 51.228908] VxVM vxdmp V-5-0-0 [Error] i/o error occurred (errno=0x206) on dmpnode 201/0x10
[ 51.230070] blk_update_request: operation not supported error, dev nvme1n1, sector 240 op 0x0:(READ) flags 0x800 phys_seg 1 prio class 0
[ 51.240861] blk_update_request: operation not supported error, dev nvme0n1, sector 0 op 0x0:(READ) flags 0x800 phys_seg 1 prio class 0

RESOLUTION:
Updated the VxVM and the VxDMP modules to address this issue. The logical block size is now set to 4096 bytes, which is the same as the physical block size.

* 4047590 (Tracking ID: 4045501)

SYMPTOM:
The following errors occur during the installation of the VRTSvxvm and the VRTSaslapm packages on CentOS 8.4 systems:
~
Verifying packages...
Preparing packages...
This release of VxVM is for Red Hat Enterprise Linux 8
and CentOS Linux 8.
Please install the appropriate OS
and then restart this installation of VxVM.
error: %prein(VRTSvxvm-7.4.1.2500-RHEL8.x86_64) scriptlet failed, exit status 1
error: VRTSvxvm-7.4.1.2500-RHEL8.x86_64: install failed
cat: 9: No such file or directory
~

DESCRIPTION:
The product installer reads the /etc/centos-release file to identify the Linux distribution. This issue occurs because the file has changed for CentOS 8.4.

RESOLUTION:
The product installer is updated to identify the correct Linux distribution so that the VRTSvxvm and the VRTSaslapm packages get installed successfully.

* 4047592 (Tracking ID: 3992040)

SYMPTOM:
VxFS Testing CFS Stress hits a kernel panic, f:vx_dio_bio_done:2

DESCRIPTION:
In RHEL8.0/SLES15 kernel code, The value in bi_status isn't a standard error code at and there are completely separate set of values that are all small positive integers (for example, BLK_STS_OK and BLK_STS_IOERROR) while actual errors sent by VM are different hence VM should send proper bi_status to FS with newer kernel. This fix avoids further kernel crashes.

RESOLUTION:
Code changes are done to have a map for bi_status and bi_error conversion( as it's been there in Linux Kernel code - blk-core.c)

* 4047695 (Tracking ID: 3911930)

SYMPTOM:
Valid PGR operations sometimes fail on a dmpnode.

DESCRIPTION:
As part of the PGR operations, if the inquiry command finds that PGR is not
supported on the dmpnode node, a flag PGR_FLAG_NOTSUPPORTED is set on the
dmpnode.
Further PGR operations check this flag and issue PGR commands only if this flag
is
NOT set.
This flag remains set even if the hardware is changed so as to support PGR.

RESOLUTION:
A new command (namely enablepr) is provided in the vxdmppr utility to clear this
flag on the specified dmpnode.

* 4047722 (Tracking ID: 4023390)

SYMPTOM:
Vxconfigd crashes as a disk contains invalid privoffset(160), which is smaller than minimum required offset(VTOC 265, GPT 208).

DESCRIPTION:
There may have disk label corruption or stale information residents on the disk header, which caused unexpected label written.

RESOLUTION:
Add a assert when updating CDS label to ensure the valid privoffset written to disk header.

* 4049268 (Tracking ID: 4044583)

SYMPTOM:
A system goes into the maintenance mode when DMP is enabled to manage native devices.

DESCRIPTION:
The "vxdmpadm gettune dmp_native_support=on" command is used to enable DMP to manage native devices. After you change the value of the dmp_native_support tunable, you need to reboot the system needs for the changes to take effect. However, the system goes into the maintenance mode after it reboots. The issue occurs due to the copying of the local liblicmgr72.so file instead of the original one while creating the vx_initrd image.

RESOLUTION:
Code changes have been made to copy the correct liblicmgr72.so file. The system successfully reboots without going into maintenance mode.

Patch ID: VRTSaslapm 7.4.2.2200

* 4047510 (Tracking ID: 4042420)

SYMPTOM:
APM modules fails to load as hard link does not get created.

DESCRIPTION:
A symlink needs to be created for the apm to get created in different partition.

RESOLUTION:
The code changes will create symlink instead of hardlinks in order to facilitate the link creation when source and destination are at different partition and also to honor thr general script flow.

Patch ID: VRTSvxvm-7.4.2.1900

* 4020207 (Tracking ID: 4018086)

SYMPTOM:
vxiod with ID as 128 was stuck with below stack:

 #2 [] vx_svar_sleep_unlock at [vxfs]
 #3 [] vx_event_wait at [vxfs]
 #4 [] vx_async_waitmsg at [vxfs]
 #5 [] vx_msg_send at [vxfs]
 #6 [] vx_send_getemapmsg at [vxfs]
 #7 [] vx_cfs_getemap at [vxfs]
 #8 [] vx_get_freeexts_ioctl at [vxfs]
 #9 [] vxportalunlockedkioctl at [vxportal]
 #10 [] vxportalkioctl at [vxportal]
 #11 [] vxfs_free_region at [vxio]
 #12 [] vol_ru_start_replica at [vxio]
 #13 [] vol_ru_start at [vxio]
 #14 [] voliod_iohandle at [vxio]
 #15 [] voliod_loop at [vxio]

DESCRIPTION:
With SmartMove feature as ON, it can happen vxiod with ID as 128 starts replication where RVG was in DCM mode, this vxiod is waiting for filesystem's response if a given region is used by filesystem or not. Filesystem will trigger MDSHIP IO on logowner. Due to a bug in code, MDSHIP IO always gets queued in vxiod with ID as 128. Hence a dead lock situation.

RESOLUTION:
Code changes have been made to avoid handling MDSHIP IO in vxiod whose ID is bigger than 127.

* 4039510 (Tracking ID: 4037915)

SYMPTOM:
Getting compilation errors due to RHEL's source code changes

DESCRIPTION:
While compiling the RHEL 8.4 kernel (4.18.0-304) the build compilation fails due to certain RH source changes.

RESOLUTION:
Following changes have been fixed to work with VxVM 7.4.1
__bdevname - depreciated
Solution: Have a struct block_device and use bdevname

blkg_tryget_closest - placed under EXPORT_SYMBOL_GPL
Solution: Locally defined the function where compilation error was hit

sync_core - implicit declaration
The implementation of function sync_core() has been moved to header file sync_core.h, so including this header file fixes the error

* 4039511 (Tracking ID: 4037914)

SYMPTOM:
Crash while running VxVM cert.

DESCRIPTION:
While running the VM cert, there is a panic reported and the

RESOLUTION:
Setting bio and submitting to IOD layer in our own vxvm_gen_strategy() function

* 4039512 (Tracking ID: 4017334)

SYMPTOM:
VXIO call stack trace generated in /var/log/messages

DESCRIPTION:
This issue occurs due to a limitation in the way InfoScale interacts with the RHEL8.2 kernel.
 Call Trace:
 kmsg_sys_rcv+0x16b/0x1c0 [vxio]
 nmcom_get_next_mblk+0x8e/0xf0 [vxio]
 nmcom_get_hdr_msg+0x108/0x200 [vxio]
 nmcom_get_next_msg+0x7d/0x100 [vxio]
 nmcom_wait_msg_tcp+0x97/0x160 [vxio]
 nmcom_server_main_tcp+0x4c2/0x11e0 [vxio]

RESOLUTION:
Making changes in header files for function definitions if rhel version>=8.2
This kernel warning can be safely ignore as it doesn't have any functionality impact.

* 4039517 (Tracking ID: 4012763)

SYMPTOM:
IO hang may happen in VVR (Veritas Volume Replicator) configuration when SRL overflows for one rlink while another one rlink is in AUTOSYNC mode.

DESCRIPTION:
In VVR, if the SRL overflow happens for rlink (R1) and some other rlink (R2) is ongoing the AUTOSYNC, then AUTOSYNC is aborted for R2, R2 gets detached and DCM mode is activated on R1 rlink.

However, due to a race condition in code handling AUTOSYNC abort and DCM activation in parallel, the DCM could not be activated properly and IO which caused DCM activation gets queued incorrectly, this results in a IO hang.

RESOLUTION:
The code has been modified to fix the race issue in handling the AUTOSYNC abort and DCM activation at same time.

Patch ID: VRTSaslapm 7.4.2.1900

* 4040765 (Tracking ID: 4040766)

SYMPTOM:
ASLAPM package not compiling with RHEL 8.4

DESCRIPTION:
With the ongoing compilation issues for RHEL 8.4, the ASLAPM package was not compiling as the build wasn't proceeding

RESOLUTION:
Code fixes have been made for the compilation issues and now the ASLAPM package is built.

Patch ID: VRTSvxvm-7.4.2.1500

* 4018182 (Tracking ID: 4008664)

SYMPTOM:
System panic occurs with the following stack:

void genunix:psignal+4()
void vxio:vol_logger_signal_gen+0x40()
int vxio:vollog_logentry+0x84()
void vxio:vollog_logger+0xcc()
int vxio:voldco_update_rbufq_chunk+0x200()
int vxio:voldco_chunk_updatesio_start+0x364()
void vxio:voliod_iohandle+0x30()
void vxio:voliod_loop+0x26c((void *)0)
unix:thread_start+4()

DESCRIPTION:
Vxio keeps vxloggerd proc_t that is used to send a signal to vxloggerd. In case vxloggerd has been ended for some reason, the signal may be sent to an unexpected process, which may cause panic.

RESOLUTION:
Code changes have been made to correct the problem.

* 4020207 (Tracking ID: 4018086)

SYMPTOM:
vxiod with ID as 128 was stuck with below stack:

 #2 [] vx_svar_sleep_unlock at [vxfs]
 #3 [] vx_event_wait at [vxfs]
 #4 [] vx_async_waitmsg at [vxfs]
 #5 [] vx_msg_send at [vxfs]
 #6 [] vx_send_getemapmsg at [vxfs]
 #7 [] vx_cfs_getemap at [vxfs]
 #8 [] vx_get_freeexts_ioctl at [vxfs]
 #9 [] vxportalunlockedkioctl at [vxportal]
 #10 [] vxportalkioctl at [vxportal]
 #11 [] vxfs_free_region at [vxio]
 #12 [] vol_ru_start_replica at [vxio]
 #13 [] vol_ru_start at [vxio]
 #14 [] voliod_iohandle at [vxio]
 #15 [] voliod_loop at [vxio]

DESCRIPTION:
With SmartMove feature as ON, it can happen vxiod with ID as 128 starts replication where RVG was in DCM mode, this vxiod is waiting for filesystem's response if a given region is used by filesystem or not. Filesystem will trigger MDSHIP IO on logowner. Due to a bug in code, MDSHIP IO always gets queued in vxiod with ID as 128. Hence a dead lock situation.

RESOLUTION:
Code changes have been made to avoid handling MDSHIP IO in vxiod whose ID is bigger than 127.

* 4021238 (Tracking ID: 4008075)

SYMPTOM:
Observed with ASL changes for NVMe, This issue observed in reboot scenario. For every reboot machine was hitting panic And this was happening in loop.

DESCRIPTION:
panic was hitting for such splitted bios, root cause for this is RHEL8 introduced a new field named as __bi_remaining.
where __bi_remaining is maintanins the count of chained bios, And for every endio that __bi_remaining gets atomically decreased in bio_endio() function.
While decreasing __bi_remaining OS checks that the __bi_remaining 'should not <= 0' and in our case __bi_remaining was always 0 and we were hitting OS
BUG_ON.

RESOLUTION:
>>> For scsi devices maxsize is 4194304,
[   26.919333] DMP_BIO_SIZE(orig_bio) : 16384, maxsize: 4194304
[   26.920063] DMP_BIO_SIZE(orig_bio) : 262144, maxsize: 4194304

>>>and for NVMe devices maxsize is 131072
[  153.297387] DMP_BIO_SIZE(orig_bio) : 262144, maxsize: 131072
[  153.298057] DMP_BIO_SIZE(orig_bio) : 262144, maxsize: 131072

* 4021240 (Tracking ID: 4010612)

SYMPTOM:
$ vxddladm set namingscheme=ebn lowercase=no
This issue observed for NVMe and ssd. where every disk has separate enclosure like nvme0, nvme1... so on. means every nvme/ssd disks names would be 
hostprefix_enclosurname0_disk0, hostprefix_enclosurname1_disk0....

DESCRIPTION:
$ vxddladm set namingscheme=ebn lowercase=no
This issue observed for NVMe and ssd. where every disk has separate enclosure like nvme0, nvme1... so on.
means every nvme/ssd disks names would be hostprefix_enclosurname0_disk0, hostprefix_enclosurname1_disk0....
eg.
smicro125_nvme0_0 <--- disk1
smicro125_nvme1_0 <--- disk2

for lowercase=no our current code is suppressing the suffix digit of enclosurname and hence multiple disks gets same name and it is showing udid_mismatch 
because whatever udid of private region is not matching with ddl. ddl database showing wrong info because of multiple disks gets same name.

smicro125_nvme_0 <--- disk1   <<<<<<<-----here suffix digit of nvme enclosure suppressed
smicro125_nvme_0 <--- disk2

RESOLUTION:
Append the suffix integer while making da_name

* 4021346 (Tracking ID: 4010207)

SYMPTOM:
System panic occurred with the below stack:

native_queued_spin_lock_slowpath()
queued_spin_lock_slowpath()
_raw_spin_lock_irqsave()
volget_rwspinlock()
volkiodone()
volfpdiskiodone()
voldiskiodone_intr()
voldmp_iodone()
bio_endio()
gendmpiodone()
dmpiodone()
bio_endio()
blk_update_request()
scsi_end_request()
scsi_io_completion()
scsi_finish_command()
scsi_softirq_done()
blk_done_softirq()
__do_softirq()
call_softirq()

DESCRIPTION:
As part of collecting the IO statistics collection, the vxstat thread acquires a spinlock and tries to copy data to the user space. During the data copy, if some page fault happens, then the thread would relinquish the CPU and provide the same to some other thread. If the thread which gets scheduled on the CPU requests the same spinlock which vxstat thread had acquired, then this results in a hard lockup situation.

RESOLUTION:
Code has been changed to properly release the spinlock before copying out the data to the user space during vxstat collection.

* 4021359 (Tracking ID: 4010040)

SYMPTOM:
A security issue occurs during Volume Manager configuration.

DESCRIPTION:
This issue occurs during the configuration of the VRTSvxvm package.

RESOLUTION:
VVR daemon is updated so that this security issue no longer occurs.

* 4021366 (Tracking ID: 4008741)

SYMPTOM:
VxVM device files appears to have device_t SELinux label.

DESCRIPTION:
If an unauthorized or modified device is allowed to exist on the system, there is the possibility the system may perform unintended or unauthorized operations.
eg: ls -LZ
...
...
/dev/vx/dsk/testdg/vol1   system_u:object_r:device_t:s0
/dev/vx/dmpconfig         system_u:object_r:device_t:s0
/dev/vx/vxcloud           system_u:object_r:device_t:s0

RESOLUTION:
Code changes made to change the device labels to misc_device_t, fixed_disk_device_t.

* 4021428 (Tracking ID: 4020166)

SYMPTOM:
Build issue becuase of "struct request"

error: struct request has no member named next_rq
Linux has deprecated the member next_req

DESCRIPTION:
The issue was observed due to changes in OS structure

RESOLUTION:
code changes are done in required files

* 4021748 (Tracking ID: 4020260)

SYMPTOM:
While enabling dmp native support tunable dmp_native_support for Centos 8 below mentioned error was observed:

[root@dl360g9-4-vm2 ~]# vxdmpadm settune dmp_native_support=on
VxVM vxdmpadm ERROR V-5-1-15690 Operation failed for one or more volume groups

VxVM vxdmpadm ERROR V-5-1-15686 The following vgs could not be migrated as error in bootloader configuration file 

 cl
[root@dl360g9-4-vm2 ~]#

DESCRIPTION:
The issue was observed due to missing code check-ins for CentOS 8 in the required files.

RESOLUTION:
Changes are done in required files for dmp native support in CentOS 8

Patch ID: VRTSaslapm 7.4.2.1500

* 4021235 (Tracking ID: 4010667)

SYMPTOM:
NVMe devices are not detected by Veritas Volume Manager(VxVM) on RHEL 8.

DESCRIPTION:
VxVM uses SCSI inquiry interface to detect the storage devices. From RHEL8 onwards SCSI inquiry interface is not available for NVMe devices. Due to this VxVM fails to detect the NVMe devices.

RESOLUTION:
Code changes have been done to use NVMe IOCTL interface to detect the NVMe devices.

* 4021946 (Tracking ID: 4017905)

SYMPTOM:
VSPEx is new array that we need to support. The current ASL is not able to claim it.

DESCRIPTION:
VSPEx is new array and current ASL is not able to claim it. So, we need to modify our code to support this array.

RESOLUTION:
Modified the asl code to support claim for VSPEx array.

* 4022942 (Tracking ID: 4017656)

SYMPTOM:
This is new array and we need to add support for claiming XP8 arrays.

DESCRIPTION:
XP8 is new array and current ASL doesn't support it. So it will not be claimed with current ASL. This array support has been now added in the current ASL.

RESOLUTION:
Code changes to support XP8 array have been done.

Patch ID: VRTSvxvm-7.4.2.1400

* 4018182 (Tracking ID: 4008664)

SYMPTOM:
System panic occurs with the following stack:

void genunix:psignal+4()
void vxio:vol_logger_signal_gen+0x40()
int vxio:vollog_logentry+0x84()
void vxio:vollog_logger+0xcc()
int vxio:voldco_update_rbufq_chunk+0x200()
int vxio:voldco_chunk_updatesio_start+0x364()
void vxio:voliod_iohandle+0x30()
void vxio:voliod_loop+0x26c((void *)0)
unix:thread_start+4()

DESCRIPTION:
Vxio keeps vxloggerd proc_t that is used to send a signal to vxloggerd. In case vxloggerd has been ended for some reason, the signal may be sent to an unexpected process, which may cause panic.

RESOLUTION:
Code changes have been made to correct the problem.

* 4020207 (Tracking ID: 4018086)

SYMPTOM:
vxiod with ID as 128 was stuck with below stack:

 #2 [] vx_svar_sleep_unlock at [vxfs]
 #3 [] vx_event_wait at [vxfs]
 #4 [] vx_async_waitmsg at [vxfs]
 #5 [] vx_msg_send at [vxfs]
 #6 [] vx_send_getemapmsg at [vxfs]
 #7 [] vx_cfs_getemap at [vxfs]
 #8 [] vx_get_freeexts_ioctl at [vxfs]
 #9 [] vxportalunlockedkioctl at [vxportal]
 #10 [] vxportalkioctl at [vxportal]
 #11 [] vxfs_free_region at [vxio]
 #12 [] vol_ru_start_replica at [vxio]
 #13 [] vol_ru_start at [vxio]
 #14 [] voliod_iohandle at [vxio]
 #15 [] voliod_loop at [vxio]

DESCRIPTION:
With SmartMove feature as ON, it can happen vxiod with ID as 128 starts replication where RVG was in DCM mode, this vxiod is waiting for filesystem's response if a given region is used by filesystem or not. Filesystem will trigger MDSHIP IO on logowner. Due to a bug in code, MDSHIP IO always gets queued in vxiod with ID as 128. Hence a dead lock situation.

RESOLUTION:
Code changes have been made to avoid handling MDSHIP IO in vxiod whose ID is bigger than 127.

* 4021346 (Tracking ID: 4010207)

SYMPTOM:
System panic occurred with the below stack:

native_queued_spin_lock_slowpath()
queued_spin_lock_slowpath()
_raw_spin_lock_irqsave()
volget_rwspinlock()
volkiodone()
volfpdiskiodone()
voldiskiodone_intr()
voldmp_iodone()
bio_endio()
gendmpiodone()
dmpiodone()
bio_endio()
blk_update_request()
scsi_end_request()
scsi_io_completion()
scsi_finish_command()
scsi_softirq_done()
blk_done_softirq()
__do_softirq()
call_softirq()

DESCRIPTION:
As part of collecting the IO statistics collection, the vxstat thread acquires a spinlock and tries to copy data to the user space. During the data copy, if some page fault happens, then the thread would relinquish the CPU and provide the same to some other thread. If the thread which gets scheduled on the CPU requests the same spinlock which vxstat thread had acquired, then this results in a hard lockup situation.

RESOLUTION:
Code has been changed to properly release the spinlock before copying out the data to the user space during vxstat collection.

* 4021428 (Tracking ID: 4020166)

SYMPTOM:
Build issue becuase of "struct request"

error: struct request has no member named next_rq
Linux has deprecated the member next_req

DESCRIPTION:
The issue was observed due to changes in OS structure

RESOLUTION:
code changes are done in required files

* 4021748 (Tracking ID: 4020260)

SYMPTOM:
While enabling dmp native support tunable dmp_native_support for Centos 8 below mentioned error was observed:

[root@dl360g9-4-vm2 ~]# vxdmpadm settune dmp_native_support=on
VxVM vxdmpadm ERROR V-5-1-15690 Operation failed for one or more volume groups

VxVM vxdmpadm ERROR V-5-1-15686 The following vgs could not be migrated as error in bootloader configuration file 

 cl
[root@dl360g9-4-vm2 ~]#

DESCRIPTION:
The issue was observed due to missing code check-ins for CentOS 8 in the required files.

RESOLUTION:
Changes are done in required files for dmp native support in CentOS 8

Patch ID: VRTSvxvm-7.4.2.1300

* 4008606 (Tracking ID: 4004455)

SYMPTOM:
snapshot restore failed on a instant_snapshot created on older version DG

DESCRIPTION:
create a DG with older version, create a instant snapshot, 
do some IOs on source volume.
try to restore the snapshot.
snapshot failed for this scenario.

RESOLUTION:
rca for this issue is there flag values were conflicting.
fixed this issue code has been checkedin

* 4010892 (Tracking ID: 4009107)

SYMPTOM:
CA chain certificate verification fails in VVR when the number of intermediate certificates is greater than the depth. So, we get error in SSL initialization.

DESCRIPTION:
CA chain certificate verification fails in VVR when the number of intermediate certificates is greater than the depth. SSL_CTX_set_verify_depth() API decides the depth of certificates (in /etc/vx/vvr/cacert file) to be verified, which is limited to count 1 in code. Thus intermediate CA certificate present first  in /etc/vx/vvr/cacert (depth 1  CA/issuer certificate for server certificate) could be obtained and verified during connection, but root CA certificate (depth 2  higher CA certificate) could not be verified while connecting and hence the error.

RESOLUTION:
Removed the call of SSL_CTX_set_verify_depth() API so as to handle the depth automatically.

* 4011866 (Tracking ID: 3976678)

SYMPTOM:
vxvm-recover:  cat: write error: Broken pipe error encountered in syslog multiple times.

DESCRIPTION:
Due to a bug in vxconfigbackup script which is started by vxvm-recover "cat : write error: Broken pipe" is encountered in syslog 
and it is reported under vxvm-recover. In vxconfigbackup code multiple subshells are created in a function call and the first subshell is for cat command. When a particular if condition is satistfied, return is called exiting the later subshells even when there is data to be read in the created cat subshell, which results in broken pipe error.

RESOLUTION:
Changes are done in VxVM code to handle the broken pipe error.

* 4011971 (Tracking ID: 3991668)

SYMPTOM:
Configured with sec logging, VVR reports data inconsistency when hit "No IBC message arrived" error.

DESCRIPTION:
It might happen seconday node served updates with larger sequence ID when In-Band Control (IBC) update arrived. In this case, VVR will drop the IBC update. Any updates whose sequence ID are larger couldn't start data volume writes. They will get queued. Data lost will happen when seconary receives automic commit and clear the queue. Hence vradmin verifydata reports data inconsistency.

RESOLUTION:
Code changes have been made to trigger updates in order to start data volume writes.

* 4012485 (Tracking ID: 4000387)

SYMPTOM:
Existing VxVM module fails to load on Rhel 8.2

DESCRIPTION:
RHEL 8.2 is a new release and had few KABI changes  on which VxVM compilation breaks .

RESOLUTION:
Compiled VxVM code against 8.2 kernel and made changes to make it compatible.

* 4012848 (Tracking ID: 4011394)

SYMPTOM:
As a part of verifying the performance of CFS cloud tiering verses scale out file system tiering in Access, it was found that CFS cloud tiering performance was degraded.

DESCRIPTION:
On verifying the performance of CFS cloud tiering verses scale out file system tiering in Access, it was found that CFS cloud tiering performance was degraded because the design was single threaded which was causing bottleneck and performance issues.

RESOLUTION:
Code Changes are around Multiple IO queues in the kernel, Multithreaded request loop to fetch IOs from kernel queues into userland global queue and Allow curl threads to work in parallel.

* 4013155 (Tracking ID: 4010458)

SYMPTOM:
In VVR (Veritas Volume replicator), the rlink might inconsistently disconnect due to unexpected transactions with below messages:
VxVM VVR vxio V-5-0-114 Disconnecting rlink <rlink_name> to permit transaction to proceed

DESCRIPTION:
In VVR (Veritas Volume replicator), a transaction is triggered when a change in the VxVM/VVR objects needs 
to be persisted on disk. 

In some scenario, few unnecessary transactions were getting triggered in loop. This was causing multiple rlink
disconnects with below message logged frequently:
VxVM VVR vxio V-5-0-114 Disconnecting rlink <rlink_name> to permit transaction to proceed

One such unexpected transaction was happening due to open/close on volume as part of SmartIO caching.
Additionally, vradmind daemon was also issuing some open/close on volumes as part of IO statistics collection,
which was causing unnecessary transactions. 

Additionally some unexpected transactions were happening due to incorrect checks in code related
to some temporary flags on volume.

RESOLUTION:
The code is fixed to disable the SmartIO caching on the volumes if the SmartIO caching is not configured on the system.
Additionally code is fixed to avoid the unexpected transactions due to incorrect checking on the temporary flags
on volume.

* 4013169 (Tracking ID: 4011691)

SYMPTOM:
Observed high CPU consumption on the VVR secondary nodes because of high pending IO load.

DESCRIPTION:
High replication related IO load on the VVR secondary and the requirement of maintaining write order fidelity with limited memory pools created  contention. This resulted in multiple VxVM kernel threads contending for shared resources and there by increasing the CPU consumption.

RESOLUTION:
Limited the way in which VVR consumes its resources so that a high pending IO load would not result into high CPU consumption.

* 4013718 (Tracking ID: 4008942)

SYMPTOM:
file system gets disabled when cache object gets full and hence unmount is failing.

DESCRIPTION:
When cache object gets full, IO errors comes on volume. 
Because IOs are not getting served as cache object is full so there is inconsistency of IOs.
Because of IO inconsistency vxfs gets disabled and unmount failed

RESOLUTION:
Fixed the issue and code has been checkedin

Patch ID: VRTSodm-7.4.2.4600

* 4137821 (Tracking ID: 4137822)

SYMPTOM:
After installing VRTSvxfs-7.4.2.4600 on RHEL platform, ODM(VRTSodm-7.4.2.4500) fails to start.

DESCRIPTION:
Because of the VxFS version update, the ODM module needs to be repackaged due to an internal dependency on VxFS version.

RESOLUTION:
The ODM module has been repackaged to support the updated VxFS version.

Patch ID: VRTSodm-7.4.2.4500

* 4127218 (Tracking ID: 4127217)

SYMPTOM:
VRTSodm driver will not load with VRTSvxfs patch.

DESCRIPTION:
Need recompilation of VRTSodm with latest VRTSvxfs.

RESOLUTION:
Recompiled the VRTSodm with new VRTSvxfs .

Patch ID: VRTSodm-7.4.2.4400

* 4113120 (Tracking ID: 4113118)

SYMPTOM:
The ODM module fails to load on RHEL8.8.

DESCRIPTION:
This issue occurs due to changes in the RHEL8.8.

RESOLUTION:
Updated ODM to support RHEL 8.8.

Patch ID: VRTSodm-7.4.2.4300

* 4114657 (Tracking ID: 4114655)

SYMPTOM:
The ODM module fails to load on RHEL8.7 minor kernel 4.18.0-425.19.2.

DESCRIPTION:
This issue occurs due to changes in the RHEL8.7 minor kernel.

RESOLUTION:
Updated ODM to support RHEL 8.7 minor kernel 4.18.0-425.19.2.

Patch ID: VRTSodm-7.4.2.4100

* 4107667 (Tracking ID: 4107778)

SYMPTOM:
The ODM module fails to load on RHEL8.7 minor kernel.

DESCRIPTION:
This issue occurs due to changes in the RHEL8.7 minor kernel.

RESOLUTION:
Modified existing modinst-odm script to accommodate the changes in the kernel and load the correct module.

Patch ID: VRTSodm-7.4.2.3900

* 4105305 (Tracking ID: 4105306)

SYMPTOM:
VRTSodm driver will not load with VRTSvxfs patch.

DESCRIPTION:
Need recompilation of VRTSodm with latest VRTSvxfs.

RESOLUTION:
Recompiled the VRTSodm with new VRTSvxfs .

Patch ID: VRTSodm-7.4.2.3800

* 4093039 (Tracking ID: 4100922)

SYMPTOM:
ODM module failed to load on RHEL8.7

DESCRIPTION:
The RHEL8.7 is new release and it has some changes in kernel which caused ODM module failed to load
on it.

RESOLUTION:
Added code to support ODM on RHEL8.7.

Patch ID: VRTSodm-7.4.2.3500

* 4087157 (Tracking ID: 4087155)

SYMPTOM:
VRTSodm driver will not load with VRTSvxfs patch.

DESCRIPTION:
Need recompilation of VRTSodm with latest VRTSvxfs.

RESOLUTION:
Recompiled the VRTSodm with new VRTSvxfs .

Patch ID: VRTSodm-7.4.2.3400

* 4080777 (Tracking ID: 4080776)

SYMPTOM:
VRTSodm driver will not load with 7.4.1.3400 VRTSvxfs patch.

DESCRIPTION:
Need recompilation of VRTSodm with latest VRTSvxfs.

RESOLUTION:
Recompiled the VRTSodm with new VRTSvxfs .

Patch ID: VRTSodm-7.4.2.2600

* 4057429 (Tracking ID: 4056673)

SYMPTOM:
Rebooting the system results into emergency mode.

DESCRIPTION:
Module dependency files get corrupted due to parallel invocation of depmod.

RESOLUTION:
Serialized the invocation of depmod through file lock. Corrected vxgms dependency in odm service file.

* 4060584 (Tracking ID: 3868609)

SYMPTOM:
While applying Oracle redo logs, a significant increase is observed in the CPU usage by the vxfs thread.

DESCRIPTION:
To avoid memory deadlocks and to track exiting threads with outstanding ODM requests, the kernels memory management was analysed. While the Oracle threads are being rescheduled, they hold the mmap_sem. The FDD threads keep waiting for mmap_sem to be released, which causes the contention and the high CPU usage.

RESOLUTION:
The bouncing of the spinlock between the CPUs is removed to reduce the CPU spike.

Patch ID: VRTSodm-7.4.2.2300

* 3930708 (Tracking ID: 3897161)

SYMPTOM:
Oracle Database on Veritas filesystem with Veritas ODM library has high
log file sync wait time.

DESCRIPTION:
The ODM_IOP lock would not be held for long, so instead of trying
to take a trylock, and deferring the IO when we fail to get the trylock, it
would be better to call the non-trylock lock and finish the IO in the interrupt
context. It should be fine on solaris since this "sleep" lock is actually an
adaptive mutex.

RESOLUTION:
Instead of ODM_IOP_TRYLOCK() call ODM_IOP_LOCK() in the odm_iodone
and finish the IO. This fix will not defer any IO.

* 4052766 (Tracking ID: 4052885)

SYMPTOM:
The ODM module fails to load on RHEL 8.5.

DESCRIPTION:
This issue occurs due to changes in the RHEL 8.5 kernel.

RESOLUTION:
The ODM module is updated to accommodate the changes in the kernel and load as expected on RHEL 8.5.

Patch ID: VRTSodm-7.4.2.2200

* 4049440 (Tracking ID: 4049438)

SYMPTOM:
VRTSodm driver will not load with 7.4.2.2200 VRTSvxfs patch.

DESCRIPTION:
Need recompilation of VRTSodm due to recent changes in VRTSvxfs.

RESOLUTION:
Recompiled the VRTSodm with new changes in VRTSvxfs.



INSTALLING THE PATCH
--------------------
Run the Installer script to automatically install the patch:
-----------------------------------------------------------
Please be noted that the installation of this P-Patch will cause downtime.

To install the patch perform the following steps on at least one node in the cluster:
1. Copy the patch infoscale-rhel8_x86_64-Patch-7.4.2.4700.tar.gz to /tmp
2. Untar infoscale-rhel8_x86_64-Patch-7.4.2.4700.tar.gz to /tmp/hf
    # mkdir /tmp/hf
    # cd /tmp/hf
    # gunzip /tmp/infoscale-rhel8_x86_64-Patch-7.4.2.4700.tar.gz
    # tar xf /tmp/infoscale-rhel8_x86_64-Patch-7.4.2.4700.tar
3. Install the hotfix(Please be noted that the installation of this P-Patch will cause downtime.)
    # pwd /tmp/hf
    # ./installVRTSinfoscale742P4700 [<host1> <host2>...]

You can also install this patch together with 7.4.2 base release using Install Bundles
1. Download this patch and extract it to a directory
2. Change to the Veritas InfoScale 7.4.2 directory and invoke the installer script
   with -patch_path option where -patch_path should point to the patch directory
    # ./installer -patch_path [<path to this patch>] [<host1> <host2>...]

Install the patch manually:
--------------------------
Manual installation is not recommended.


REMOVING THE PATCH
------------------
Manual uninstallation is not recommended.


KNOWN ISSUES
------------
* Tracking ID: 4097111

SYMPTOM: While doing two or more mount (of vxfs file system) operations in parallel, underneath an already
 existing vxfs mount point, if a force umount is attempted on the parent vxfs mount point, then sometimes
 the force unmount operation hangs permanently.

WORKAROUND: None except rebooting the system.



SPECIAL INSTRUCTIONS
--------------------
Do not install VRTSvxvm patch 7.4.2.4700, if you have Hardware Replicated devices such as EMC SRDF, Hitachi TrueCopy etc connected to the servers to be patched.
 
The following command can be used to determine if Hardware Replicated disk groups are presented to the server:
 
# vxdisk -qpx LIST_CLONE list | awk '{print $2, $3 }' | sort | uniq  | grep -v "^-" | awk '$2 == "yes" {print $1}'
 
The vxdg option ‘-o usereplicatedev=only’ required to exclusively import the Hardware Replicated disk groups is NOT supported in this patch. 
This enhanced VxVM functionality will be added back in next 7.4.2 update release.
 
Where the /etc/VRTSvcs/conf/config/main.cf file already contains special VCS attributes such as ScanDisks, DGOptions. 
Amendments may be required as follows:   
 
The VxVM 7.4.2.4600 patch included support for vxdg option “-o usereplicatedev=only”, the main.cf required the below attributes to be added to the VCS DiskGroup and CVMVolDg type resources for Hardware Replicated disk groups.
 
After upgrading to this specific platform patch, sysadmins will need to manually remove the additional VCS attributes “ScanDisks” and "DGOptions" entries from the main.cf for vxdg import operations to work seamlessly.  
                 
Sample DiskGroup resource definition for Hardware Replicated disk group
 
              DiskGroup srdf_sg (
                              DiskGroup = LINUXSRDF
                              ClearClone = 1
                              DGOptions = "-o usereplicatedev=only"      #### REMOVE
                              ScanDisks = 1                                                      #### REMOVE
               )
 

Note: The VRTScavf Private hotfix 7.4.2.4501 was required to support additional CVMVolDg attributes: ScanDisks with DGOptions

Sample CVMVolDg resource definition for Hardware Replicated disk group
              CVMVolDg srdf_dg (
                              CVMDiskGroup = LINUXSRDF
                              CVMVolume = { data, scripts }
                              CVMActivation = sw
                              CVMDeportOnOffline = 1
                              ClearClone = 1
                              DGOptions = { "-t -o usereplicatedev=only" }   #### REMOVE
                              ScanDisks = 1                                                           #### REMOVE
                )


OTHERS
------
NONE