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vxfs_ap_assign_ckpt - assign an allocation policy to file data and metadata in a Storage Checkpoint


cc -I /opt/VRTS/include -L /opt/VRTS/lib

-l vxfsutil -ldl

#include <sys/types.h>

#include <vxfsutil.h>

int vxfs_ap_assign_ckpt(int fd, char *ckptname, char *datapol, char *metapol);




vxfs_ap_assign_ckpt() assigns the given allocation policies for data and metadata to the Storage Checkpoint specified by ckptname. To clear a policy assignment, specify a NULL pointer for the policy field to be cleared (either datapol or metapol). datapol is the name of the data policy that can be created with fsapadm(1M) or through the vxfs_ap_define() API. metapol is the name of the metadata policy that can be created with fsapadm(1M) or through the vxfs_ap_define() API. The file descriptor fd must refer to a file to be operated on in the Storage Checkpoint.

To use this function, specify -l vxfsutil while linking.


Assigning or defining an allocation policy can fail because of a conflict with volume flags. The conflict detection attempts to detect all conflicts, but there is no guarantee that all conflicts will be detected.

This function is supported on Version 6 and later disk layouts. This API supports file system versions 6.0 and above.


vxfs_ap_assign_ckpt() returns zero on success, non-zero on failure.


EAGAIN The file system is not currently frozen.
EFAULT One or more of the specified pointer arguments points to an illegal address.
EINVAL The specified flags are invalid.
EIO An I/O error occurred during the operation.
ENOENT One or more of the specified policies does not exist.
ENOSYS There is no license installed to allow this operation.
ENOTSUP This operation is not supported by the disk layout version of the specified file system. Use vxupgrade(1m) to enable this operation.
ENXIO An I/O error occurred during the operation.
EPERM The effective user ID of the calling process does not have appropriate privileges to perform this operation.
EROFS The specified file system is mounted read-only.


To assign a policy to a Storage Checkpoint:
# vxfs_ap_assign_ckpt(fd, checkpoint_name data_policy, meta_policy);


vxfs_ap_assign_ckptchain(3), vxfs_ap_assign_file(3), vxfs_ap_assign_fs(3), vxfs_ap_define(3), vxfs_ap_define2(3), vxfs_ap_remove(3), vxfs_ap_enforce_file(3), vxfs_ap_enforce_file2(3), vxfs_ap_enumerate(3), vxfs_ap_query(3), vxfs_ap_query2(3), vxfs_ap_query_ckpt(3), vxfs_ap_query_file(3), vxfs_ap_query_fs(3), vxfs_vol_add(3), vxfs_vol_deencapsulate(3), vxfs_vol_encapsulate(3), vxfs_vol_enumerate(3), vxfs_vol_remove(3), vxfs_vol_resize(3), vxfs_vol_stat(3)

VxFS 8.0 vxfs_ap_assign_ckpt(3)