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781fca5b10
Pull xfs updates from Darrick Wong:
"This is the second part of the XFS changes for 4.19.
The biggest changes are the removal of buffer heads frm XFS, a massive
reworking of the deferred transaction operations handling code, the
removal of the long defunct barrier/nobarrier mount options, and the
addition of a few more online repair functions.
Summary:
- Use extent maps to track pagecache page status instead of
bufferhead state.
- Refactor pagecache read and write paths to use the new iomap
library functions, which enable us to drop the old bufferhead code
for pagesize == blocksize filesystems.
- Set up parallel per-block-per-page metadata to track subpage
information that was tracked by buffer heads, which enables us to
drop the old bufferhead code for pagesize > blocksize filesystems.
- Tie a deferred ops control structure to a transaction so that we
can take advantage of an upper-level dfops without having to plumb
pointer passing through the code.
- Refactor the deferred ops code to track deferred ops as part of the
transaction structure (instead of as a separate data structure) so
that we can simplify the scoping rules around defer_ops.
- Refactor twisty delwri buffer submission code to avoid deadlocks.
- Shorten and fix indenting problems in the scrub code.
- Detect obviously bad summary counts at mount and fix them.
- Directly associate deferred ops control structure with a
transaction so that callers no longer have to manage it themselves.
- Remove a couple of IRIX-era inode macros.
- Remove the long-deprecated 'barrier' and 'nobarrier' mount options.
- Clean up the inode fork structure a bit.
- Check for bad fs summary counter values in the superblock.
- Reduce COW fork lookups during writeback.
- Refactor the deferred ops control structures into the transaction
structure, thereby eliminating the need for transaction users to
handle the deferred ops as a separate data structure.
- Add the ability to repair AG headers online.
- Fix a crash due to insufficient return value checking.
- Various fixes and cleanups"
* tag 'xfs-4.19-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (155 commits)
xfs: fix a null pointer dereference in xfs_bmap_extents_to_btree
xfs: remove b_last_holder & associated macros
iomap: Switch to offset_in_page for clarity
xfs: Close race between direct IO and xfs_break_layouts()
xfs: repair the AGI
xfs: repair the AGFL
xfs: repair the AGF
xfs: remove dead error handling code in xfs_dquot_disk_alloc()
xfs: use WRITE_ONCE to update if_seq
xfs: fix a comment in xfs_log_reserve
xfs: only validate summary counts on primary superblock
xfs: substitute spaces with tabs
xfs: fold dfops into the transaction
xfs: always defer agfl block frees
xfs: pass transaction to xfs_defer_add()
xfs: replace xfs_defer_ops ->dop_pending with on-stack list
xfs: cancel dfops on xfs_defer_finish() error
xfs: clean out superfluous dfops dop params/vars
xfs: drop dop param from xfs_defer_op_type ->finish_item() callback
xfs: automatic dfops inode relogging
...
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