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linux/fs/xfs/libxfs
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Chandan Babu R 3015196746 xfs: Introduce error injection to allocate only minlen size extents for files 
This commit adds XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT error tag which
helps userspace test programs to get xfs_bmap_btalloc() to always
allocate minlen sized extents.

This is required for test programs which need a guarantee that minlen
extents allocated for a file do not get merged with their existing
neighbours in the inode's BMBT. "Inode fork extent overflow check" for
Directories, Xattrs and extension of realtime inodes need this since the
file offset at which the extents are being allocated cannot be
explicitly controlled from userspace.

One way to use this error tag is to,
1. Consume all of the free space by sequentially writing to a file.
2. Punch alternate blocks of the file. This causes CNTBT to contain
   sufficient number of one block sized extent records.
3. Inject XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT error tag.
After step 3, xfs_bmap_btalloc() will issue space allocation
requests for minlen sized extents only.

ENOSPC error code is returned to userspace when there aren't any "one
block sized" extents left in any of the AGs.

Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2021-01-22 16:54:49 -08:00
..
xfs_ag_resv.c xfs: fix missing header includes 2019-11-07 13:00:53 -08:00
xfs_ag_resv.h xfs: get rid of unnecessary xfs_perag_{get,put} pairs 2020-07-14 08:47:33 -07:00
xfs_ag.c xfs: store inode btree block counts in AGI header 2020-09-15 20:52:39 -07:00
xfs_ag.h xfs: add a new ioctl to describe allocation group geometry 2019-04-14 18:15:57 -07:00
xfs_alloc_btree.c xfs: Remove kmem_zone_zalloc() usage 2020-07-28 20:24:14 -07:00
xfs_alloc_btree.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_alloc.c xfs: Introduce error injection to allocate only minlen size extents for files 2021-01-22 16:54:49 -08:00
xfs_alloc.h xfs: Introduce error injection to allocate only minlen size extents for files 2021-01-22 16:54:49 -08:00
xfs_attr_leaf.c xfs: fix forkoff miscalculation related to XFS_LITINO(mp) 2020-11-18 09:23:51 -08:00
xfs_attr_leaf.h xfs: Add xfs_has_attr and subroutines 2020-07-28 20:24:14 -07:00
xfs_attr_remote.c xfs: remove the redundant crc feature check in xfs_attr3_rmt_verify 2020-09-25 11:34:07 -07:00
xfs_attr_remote.h xfs: Refactor xfs_attr_rmtval_remove 2020-07-28 20:28:11 -07:00
xfs_attr_sf.h xfs: Convert xfs_attr_sf macros to inline functions 2020-09-15 20:52:42 -07:00
xfs_attr.c xfs: Check for extent overflow when adding/removing xattrs 2021-01-22 16:54:48 -08:00
xfs_attr.h xfs: Add xfs_has_attr and subroutines 2020-07-28 20:24:14 -07:00
xfs_bit.c xfs: fix missing header includes 2019-11-07 13:00:53 -08:00
xfs_bit.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_bmap_btree.c xfs: remove unneeded return value check for *init_cursor() 2020-12-09 09:49:38 -08:00
xfs_bmap_btree.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_bmap.c xfs: Introduce error injection to allocate only minlen size extents for files 2021-01-22 16:54:49 -08:00
xfs_bmap.h xfs: set xefi_discard when creating a deferred agfl free log intent item 2020-10-29 08:19:18 -07:00
xfs_btree_staging.c xfs: support bulk loading of staged btrees 2020-03-18 08:12:23 -07:00
xfs_btree_staging.h xfs: xfs_btree_staging.h: delete duplicated words 2020-07-28 20:24:14 -07:00
xfs_btree.c xfs: remove xfs_buf_t typedef 2020-12-16 16:07:34 -08:00
xfs_btree.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_cksum.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xfs_da_btree.c xfs: Refactor xfs_da_state_alloc() helper 2020-07-28 20:24:14 -07:00
xfs_da_btree.h xfs: Refactor xfs_da_state_alloc() helper 2020-07-28 20:24:14 -07:00
xfs_da_format.h xfs: code cleanup in xfs_attr_leaf_entsize_{remote,local} 2020-09-25 11:34:08 -07:00
xfs_defer.c xfs: only relog deferred intent items if free space in the log gets low 2020-10-07 08:40:29 -07:00
xfs_defer.h xfs: fix an incore inode UAF in xfs_bui_recover 2020-10-07 08:40:28 -07:00
xfs_dir2_block.c xfs: move the per-fork nextents fields into struct xfs_ifork 2020-05-19 09:40:58 -07:00
xfs_dir2_data.c xfs: check owner of dir3 data blocks 2020-03-12 07:58:12 -07:00
xfs_dir2_leaf.c xfs: add a function to deal with corrupt buffers post-verifiers 2020-03-12 07:58:12 -07:00
xfs_dir2_node.c xfs: Refactor xfs_da_state_alloc() helper 2020-07-28 20:24:14 -07:00
xfs_dir2_priv.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_dir2_sf.c xfs: fix an ABBA deadlock in xfs_rename 2021-01-22 16:54:43 -08:00
xfs_dir2.c xfs: move the fork format fields into struct xfs_ifork 2020-05-19 09:40:58 -07:00
xfs_dir2.h xfs: fix an ABBA deadlock in xfs_rename 2021-01-22 16:54:43 -08:00
xfs_dquot_buf.c xfs: widen ondisk quota expiration timestamps to handle y2038+ 2020-09-15 20:52:41 -07:00
xfs_errortag.h xfs: Introduce error injection to allocate only minlen size extents for files 2021-01-22 16:54:49 -08:00
xfs_format.h xfs: remove the unused XFS_B_FSB_OFFSET macro 2020-12-09 09:49:38 -08:00
xfs_fs.h xfs: widen ondisk inode timestamps to deal with y2038+ 2020-09-15 20:52:41 -07:00
xfs_health.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_ialloc_btree.c xfs: remove unneeded return value check for *init_cursor() 2020-12-09 09:49:38 -08:00
xfs_ialloc_btree.h xfs: add support for inode btree staging cursors 2020-03-18 08:12:23 -07:00
xfs_ialloc.c xfs: remove xfs_buf_t typedef 2020-12-16 16:07:34 -08:00
xfs_ialloc.h xfs: spilt xfs_dialloc() into 2 functions 2020-12-12 10:48:25 -08:00
xfs_iext_tree.c xfs: remove kmem_realloc() 2020-09-06 18:05:51 -07:00
xfs_inode_buf.c xfs: don't catch dax+reflink inodes as corruption in verifier 2020-12-09 09:49:38 -08:00
xfs_inode_buf.h xfs: use the existing type definition for di_projid 2020-09-25 11:34:07 -07:00
xfs_inode_fork.c xfs: Introduce error injection to reduce maximum inode fork extent count 2021-01-22 16:54:48 -08:00
xfs_inode_fork.h xfs: Check for extent overflow when swapping extents 2021-01-22 16:54:48 -08:00
xfs_log_format.h xfs: redefine xfs_ictimestamp_t 2020-09-15 20:52:41 -07:00
xfs_log_recover.h xfs: remove xlog_recover_iodone 2020-09-15 20:52:39 -07:00
xfs_log_rlimit.c xfs: remove unused header files 2019-06-28 19:30:43 -07:00
xfs_quota_defs.h xfs: widen ondisk quota expiration timestamps to handle y2038+ 2020-09-15 20:52:41 -07:00
xfs_refcount_btree.c xfs: Remove kmem_zone_zalloc() usage 2020-07-28 20:24:14 -07:00
xfs_refcount_btree.h xfs: add support for refcount btree staging cursors 2020-03-18 08:12:23 -07:00
xfs_refcount.c xfs: remove unneeded return value check for *init_cursor() 2020-12-09 09:49:38 -08:00
xfs_refcount.h xfs: remove unnecessary int returns from deferred refcount functions 2019-08-28 08:31:02 -07:00
xfs_rmap_btree.c xfs: revert "xfs: fix rmap key and record comparison functions" 2020-11-19 15:17:50 -08:00
xfs_rmap_btree.h xfs: add support for rmap btree staging cursors 2020-03-18 08:12:23 -07:00
xfs_rmap.c xfs: remove unneeded return value check for *init_cursor() 2020-12-09 09:49:38 -08:00
xfs_rmap.h xfs: reinitialize rm_flags when unpacking an offset into an rmap irec 2019-08-28 08:31:02 -07:00
xfs_rtbitmap.c xfs: remove xfs_buf_t typedef 2020-12-16 16:07:34 -08:00
xfs_sb.c xfs: introduce xfs_validate_stripe_geometry() 2020-12-09 09:49:38 -08:00
xfs_sb.h xfs: introduce xfs_validate_stripe_geometry() 2020-12-09 09:49:38 -08:00
xfs_shared.h xfs: check tp->t_dqinfo value instead of the XFS_TRANS_DQ_DIRTY flag 2020-12-09 09:49:38 -08:00
xfs_symlink_remote.c xfs: move the fork format fields into struct xfs_ifork 2020-05-19 09:40:58 -07:00
xfs_trans_inode.c xfs: widen ondisk inode timestamps to deal with y2038+ 2020-09-15 20:52:41 -07:00
xfs_trans_resv.c xfs: add a new xfs_sb_version_has_v3inode helper 2020-03-19 08:47:34 -07:00
xfs_trans_resv.h xfs: convert to SPDX license tags 2018-06-06 14:17:53 -07:00
xfs_trans_space.h xfs: fix off-by-one in inode alloc block reservation calculation 2020-08-26 14:13:21 -07:00
xfs_types.c xfs: refactor file range validation 2020-12-09 09:49:38 -08:00
xfs_types.h xfs: refactor file range validation 2020-12-09 09:49:38 -08:00