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linux-stable/fs/xfs
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Dave Chinner 2fd26cc07e xfs: double link the unlinked inode list 
Now we have forwards traversal via the incore inode in place, we now
need to add back pointers to the incore inode to entirely replace
the back reference cache. We use the same lookup semantics and
constraints as for the forwards pointer lookups during unlinks, and
so we can look up any inode in the unlinked list directly and update
the list pointers, forwards or backwards, at any time.

The only wrinkle in converting the unlinked list manipulations to
use in-core previous pointers is that log recovery doesn't have the
incore inode state built up so it can't just read in an inode and
release it to finish off the unlink. Hence we need to modify the
traversal in recovery to read one inode ahead before we
release the inode at the head of the list. This populates the
next->prev relationship sufficient to be able to replay the unlinked
list and hence greatly simplify the runtime code.

This recovery algorithm also requires that we actually remove inodes
from the unlinked list one at a time as background inode
inactivation will result in unlinked list removal racing with the
building of the in-memory unlinked list state. We could serialise
this by holding the AGI buffer lock when constructing the in memory
state, but all that does is lockstep background processing with list
building. It is much simpler to flush the inodegc immediately after
releasing the inode so that it is unlinked immediately and there is
no races present at all.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2022-07-14 11:46:43 +10:00
..
libxfs xfs: double link the unlinked inode list 2022-07-14 11:46:43 +10:00
scrub xfs: make is_log_ag() a first class helper 2022-07-07 19:13:21 +10:00
Kconfig
kmem.c mm: introduce memalloc_retry_wait() 2022-01-15 16:30:29 +02:00
kmem.h xfs: remove kmem_zone typedef 2021-10-22 16:00:31 -07:00
Makefile xfs: Set up infrastructure for log attribute replay 2022-05-04 12:41:02 +10:00
mrlock.h
xfs.h
xfs_acl.c xfs: move xfs_attr_use_log_assist usage out of libxfs 2022-05-27 10:34:04 +10:00
xfs_acl.h xfs: improve __xfs_set_acl 2022-04-26 13:34:42 +10:00
xfs_aops.c Page cache changes for 5.19 2022-05-24 19:55:07 -07:00
xfs_aops.h
xfs_attr_inactive.c xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_attr_item.c xfs: don't hold xattr leaf buffers across transaction rolls 2022-06-29 08:47:56 -07:00
xfs_attr_item.h xfs: share xattr name and value buffers when logging xattr updates 2022-05-23 08:43:46 +10:00
xfs_attr_list.c xfs: Set up infrastructure for log attribute replay 2022-05-04 12:41:02 +10:00
xfs_bio_io.c Bug fixes for 5.18: 2022-04-01 19:30:44 -07:00
xfs_bmap_item.c xfs: whiteouts release intents that are not in the AIL 2022-05-04 11:46:47 +10:00
xfs_bmap_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_bmap_util.c xfs: dont treat rt extents beyond EOF as eofblocks to be cleared 2022-06-29 08:47:56 -07:00
xfs_bmap_util.h xfs: kill the XFS_IOC_{ALLOC,FREE}SP* ioctls 2022-01-17 09:16:41 -08:00
xfs_buf.c xfs: convert buffer flags to unsigned. 2022-04-21 08:44:59 +10:00
xfs_buf.h xfs: convert buffer flags to unsigned. 2022-04-21 08:44:59 +10:00
xfs_buf_item.c xfs: log items should have a xlog pointer, not a mount 2022-03-20 08:59:49 -07:00
xfs_buf_item.h xfs: convert buffer log item flags to unsigned. 2022-04-21 10:46:40 +10:00
xfs_buf_item_recover.c xfs: convert buf_cancel_table allocation to kmalloc_array 2022-05-27 10:27:19 +10:00
xfs_dir2_readdir.c xfs: take the ILOCK when readdir inspects directory mapping data 2022-01-11 15:11:04 -08:00
xfs_discard.c xfs: pass perag to xfs_alloc_read_agf() 2022-07-07 19:07:40 +10:00
xfs_discard.h
xfs_dquot.c xfs: remove warning counters from struct xfs_dquot_res 2022-05-11 17:12:09 +10:00
xfs_dquot.h xfs: remove warning counters from struct xfs_dquot_res 2022-05-11 17:12:09 +10:00
xfs_dquot_item.c xfs: remove support for disabling quota accounting on a mounted file system 2021-08-06 11:05:36 -07:00
xfs_dquot_item.h xfs: remove support for disabling quota accounting on a mounted file system 2021-08-06 11:05:36 -07:00
xfs_dquot_item_recover.c xfs: replace xfs_sb_version checks with feature flag checks 2021-08-19 10:07:12 -07:00
xfs_error.c xfs: add leaf to node error tag 2022-05-11 17:01:23 +10:00
xfs_error.h xfs: convert ptag flags to unsigned. 2022-04-21 10:47:25 +10:00
xfs_export.c xfs: convert remaining mount flags to state flags 2021-08-19 10:07:13 -07:00
xfs_export.h
xfs_extent_busy.c xfs: pass perags through to the busy extent code 2021-06-02 10:48:24 +10:00
xfs_extent_busy.h xfs: pass perags through to the busy extent code 2021-06-02 10:48:24 +10:00
xfs_extfree_item.c xfs: pass perag to xfs_alloc_read_agf() 2022-07-07 19:07:40 +10:00
xfs_extfree_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_file.c xfs: Changes for 5.19-rc1 [2nd set] 2022-06-01 17:23:53 -07:00
xfs_filestream.c xfs: pass perag to xfs_alloc_read_agf() 2022-07-07 19:07:40 +10:00
xfs_filestream.h xfs: convert mount flags to features 2021-08-19 10:07:12 -07:00
xfs_fsmap.c xfs: pass perag to xfs_alloc_read_agf() 2022-07-07 19:07:40 +10:00
xfs_fsmap.h
xfs_fsops.c xfs: Pre-calculate per-AG agbno geometry 2022-07-07 19:13:02 +10:00
xfs_fsops.h
xfs_globals.c xfs: Add larp debug option 2022-05-11 17:01:22 +10:00
xfs_health.c xfs: replace XFS_FORCED_SHUTDOWN with xfs_is_shutdown 2021-08-19 10:07:13 -07:00
xfs_icache.c xfs: double link the unlinked inode list 2022-07-14 11:46:43 +10:00
xfs_icache.h xfs: introduce xfs_inodegc_push() 2022-06-23 13:34:38 -07:00
xfs_icreate_item.c xfs: fix potential log item leak 2022-05-04 11:45:11 +10:00
xfs_icreate_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_inode.c xfs: double link the unlinked inode list 2022-07-14 11:46:43 +10:00
xfs_inode.h xfs: double link the unlinked inode list 2022-07-14 11:46:43 +10:00
xfs_inode_item.c xfs: hide log iovec alignment constraints 2022-05-04 11:45:50 +10:00
xfs_inode_item.h xfs: aborting inodes on shutdown may need buffer lock 2022-03-29 18:21:59 -07:00
xfs_inode_item_recover.c xfs: hide log iovec alignment constraints 2022-05-04 11:45:50 +10:00
xfs_ioctl.c xfs: make last AG grow/shrink perag centric 2022-07-07 19:07:09 +10:00
xfs_ioctl.h xfs: kill the XFS_IOC_{ALLOC,FREE}SP* ioctls 2022-01-17 09:16:41 -08:00
xfs_ioctl32.c xfs: Set up infrastructure for log attribute replay 2022-05-04 12:41:02 +10:00
xfs_ioctl32.h xfs: remove unused xfs_ioctl32.h declarations 2022-01-18 10:18:36 -08:00
xfs_iomap.c xfs: Conditionally upgrade existing inodes to use large extent counters 2022-04-13 07:02:44 +00:00
xfs_iomap.h iomap: add a IOMAP_DAX flag 2021-12-04 08:58:53 -08:00
xfs_iops.c xfs: move xfs_attr_use_log_assist usage out of libxfs 2022-05-27 10:34:04 +10:00
xfs_iops.h
xfs_itable.c xfs: Enable bulkstat ioctl to support 64-bit per-inode extent counters 2022-04-13 07:02:45 +00:00
xfs_itable.h xfs: Enable bulkstat ioctl to support 64-bit per-inode extent counters 2022-04-13 07:02:45 +00:00
xfs_iwalk.c xfs: avoid buffer deadlocks when walking fs inodes 2021-08-09 11:13:16 -07:00
xfs_iwalk.h xfs: Decouple XFS_IBULK flags from XFS_IWALK flags 2022-04-13 07:02:44 +00:00
xfs_linux.h xfs: drop async cache flushes from CIL commits. 2022-03-29 18:22:02 -07:00
xfs_log.c xfs: prevent a UAF when log IO errors race with unmount 2022-07-01 09:09:52 -07:00
xfs_log.h xfs: share xattr name and value buffers when logging xattr updates 2022-05-23 08:43:46 +10:00
xfs_log_cil.c xfs: Changes for 5.19-rc1 2022-05-25 19:34:40 -07:00
xfs_log_priv.h xfs: refactor buffer cancellation table allocation 2022-05-27 10:26:17 +10:00
xfs_log_recover.c xfs: double link the unlinked inode list 2022-07-14 11:46:43 +10:00
xfs_message.c Merge branch 'guilt/xfs-unsigned-flags-5.18' into xfs-5.19-for-next 2022-04-21 16:45:03 +10:00
xfs_message.h xfs: implement per-mount warnings for scrub and shrink usage 2022-05-27 10:31:34 +10:00
xfs_mount.c xfs: Pre-calculate per-AG agbno geometry 2022-07-07 19:13:02 +10:00
xfs_mount.h xfs: bound maximum wait time for inodegc work 2022-06-23 13:34:38 -07:00
xfs_mru_cache.c xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_mru_cache.h
xfs_ondisk.h xfs: Set up infrastructure for log attribute replay 2022-05-04 12:41:02 +10:00
xfs_pnfs.c xfs: use setattr_copy to set vfs inode attributes 2022-03-14 10:23:16 -07:00
xfs_pnfs.h
xfs_pwork.c
xfs_pwork.h
xfs_qm.c xfs: purge dquots after inode walk fails during quotacheck 2022-05-27 10:21:43 +10:00
xfs_qm.h xfs: remove quota warning limit from struct xfs_quota_limits 2022-05-11 17:12:09 +10:00
xfs_qm_bhv.c xfs: replace xfs_sb_version checks with feature flag checks 2021-08-19 10:07:12 -07:00
xfs_qm_syscalls.c xfs: introduce xfs_inodegc_push() 2022-06-23 13:34:38 -07:00
xfs_quota.h xfs: queue inactivation immediately when quota is nearing enforcement 2021-08-09 10:52:18 -07:00
xfs_quotaops.c xfs: don't set quota warning values 2022-05-11 17:12:09 +10:00
xfs_refcount_item.c xfs: whiteouts release intents that are not in the AIL 2022-05-04 11:46:47 +10:00
xfs_refcount_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_reflink.c xfs: pass perag to xfs_alloc_read_agf() 2022-07-07 19:07:40 +10:00
xfs_reflink.h xfs: pass perag to xfs_alloc_read_agf() 2022-07-07 19:07:40 +10:00
xfs_rmap_item.c xfs: whiteouts release intents that are not in the AIL 2022-05-04 11:46:47 +10:00
xfs_rmap_item.h xfs: rename _zone variables to _cache 2021-10-22 16:04:20 -07:00
xfs_rtalloc.c Merge tag 'large-extent-counters-v9' of https://github.com/chandanr/linux into xfs-5.19-for-next 2022-04-21 16:46:17 +10:00
xfs_rtalloc.h xfs: recalculate free rt extents after log recovery 2022-04-12 06:49:42 +10:00
xfs_stats.c
xfs_stats.h
xfs_super.c xfs: introduce xfs_inodegc_push() 2022-06-23 13:34:38 -07:00
xfs_super.h xfs: move xfs_attr_use_log_assist out of xfs_log.c 2022-05-27 10:33:29 +10:00
xfs_symlink.c xfs: Directory's data fork extent counter can never overflow 2022-04-13 07:02:07 +00:00
xfs_symlink.h
xfs_sysctl.c
xfs_sysctl.h xfs: Add larp debug option 2022-05-11 17:01:22 +10:00
xfs_sysfs.c xfs: Add larp debug option 2022-05-11 17:01:22 +10:00
xfs_sysfs.h
xfs_trace.c xfs: add trace point for fs shutdown 2021-08-18 18:46:00 -07:00
xfs_trace.h xfs: introduce xfs_iunlink_lookup 2022-07-14 11:43:09 +10:00
xfs_trans.c xfs: report "max_resp" used for min log size computation 2022-04-28 10:25:23 -07:00
xfs_trans.h xfs: intent item whiteouts 2022-05-04 11:50:29 +10:00
xfs_trans_ail.c xfs: log shutdown triggers should only shut down the log 2022-03-29 18:22:01 -07:00
xfs_trans_buf.c xfs: introduce xfs_buf_daddr() 2021-08-19 10:07:14 -07:00
xfs_trans_dquot.c xfs: remove quota warning limit from struct xfs_quota_limits 2022-05-11 17:12:09 +10:00
xfs_trans_priv.h xfs: AIL should be log centric 2022-03-20 08:59:49 -07:00
xfs_xattr.c xfs: fix TOCTOU race involving the new logged xattrs control knob 2022-06-15 23:13:32 -07:00
xfs_xattr.h xfs: move xfs_attr_use_log_assist usage out of libxfs 2022-05-27 10:34:04 +10:00