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Table 9. GPFS programming interfaces (continued)
Interface Purpose
“gpfs_ireadlink() Subroutine” on page 323 Reads a symbolic link.
“gpfs_ireadx() Subroutine” on page 325 Performs block level incremental read of a file within an
incremental inode scan.
“gpfs_iscan_t Structure” on page 327 Contains mapping of the inode scan structure.
“gpfs_next_inode() Subroutine” on page 328 Retrieves the next inode from the inode scan.
“gpfs_opaque_acl_t Structure” on page 330 Contains buffer mapping for the gpfs_getacl() and
gpfs_putacl() subroutines.
“gpfs_open_inodescan() Subroutine” on page 331 Opens an inode scan over a file system or snapshot.
“gpfs_prealloc() Subroutine” on page 333 Pre-allocates disk storage for a GPFS file.
“gpfs_putacl() Subroutine” on page 335 Sets the access control information for a GPFS file.
“gpfs_quotactl() Subroutine” on page 337 Manipulates disk quotas on file systems.
“gpfs_quotaInfo_t Structure” on page 340 Contains buffer mapping for the gpfs_quotactl() subroutine.
“gpfs_seek_inode() Subroutine” on page 341 Advances an inode scan to the specified inode number.
“gpfs_stat() Subroutine” on page 343 Returns exact file status for a GPFS file.
“gpfsAccessRange_t Structure” on page 344 Declares an access range within a file for an application.
“gpfsCancelHints_t Structure” on page 345 Indicates to remove any hints against the open file handle.
“gpfsClearFileCache_t Structure” on page 346 Indicates file access in the near future is not expected.
“gpfsDataShipMap_t Structure” on page 347 Indicates which agent nodes are to be used for data shipping.
“gpfsDataShipStart_t Structure” on page 349 Initiates data shipping mode.
“gpfsDataShipStop_t Structure” on page 352 Takes a file out of data shipping mode.
“gpfsFcntlHeader_t Structure” on page 353 Contains declaration information for the gpfs_fcntl()
subroutine.
“gpfsFreeRange_t Structure” on page 354 Undeclares an access range within a file for an application.
“gpfsGetFilesetName_t Structure” on page 355 Obtains a file’s fileset name.
“gpfsGetReplication_t Structure” on page 356 Obtains a file’s replication factors.
“gpfsGetSnapshotName_t Structure” on page 358 Obtains a file’s snapshot name.
“gpfsGetStoragePool_t Structure” on page 359 Obtains a file’s storage pool name.
“gpfsMultipleAccessRange_t Structure” on page 360 Defines prefetching and write-behind file access for an
application.
“gpfsRestripeData_t Structure” on page 362 Restripes a file’s data blocks.
“gpfsSetReplication_t Structure” on page 363 Sets a file’s replication factors.
“gpfsSetStoragePool_t Structure” on page 365 Sets a file’s assigned storage pool.
278 GPFS: Administration and Programming Reference