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05a630d76b
linux/fs/xfs/libxfs
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Darrick J. Wong 05a630d76b xfs: allow unwritten extents in the CoW fork 
In the data fork, we only allow extents to perform the following state
transitions:

delay -> real <-> unwritten

There's no way to move directly from a delalloc reservation to an
/unwritten/ allocated extent.  However, for the CoW fork we want to be
able to do the following to each extent:

delalloc -> unwritten -> written -> remapped to data fork

This will help us to avoid a race in the speculative CoW preallocation
code between a first thread that is allocating a CoW extent and a second
thread that is remapping part of a file after a write.  In order to do
this, however, we need two things: first, we have to be able to
transition from da to unwritten, and second the function that converts
between real and unwritten has to be made aware of the cow fork.  Do
both of those things.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2017-02-02 15:14:01 -08:00
..
xfs_ag_resv.c xfs: use per-AG reservations for the finobt 2017-01-25 07:49:35 -08:00
xfs_ag_resv.h xfs: set up per-AG free space reservations 2016-09-19 10:30:52 +10:00
xfs_alloc_btree.c Merge branch 'xfs-4.10-misc-fixes-4' into for-next 2016-12-09 16:56:26 +11:00
xfs_alloc_btree.h
xfs_alloc.c xfs: don't rely on ->total in xfs_alloc_space_available 2017-01-09 13:45:01 -08:00
xfs_alloc.h xfs: adjust allocation length in xfs_alloc_space_available 2017-01-09 13:37:44 -08:00
xfs_attr_leaf.c xfs: ignore leaf attr ichdr.count in verifier during log replay 2016-12-09 16:49:47 +11:00
xfs_attr_leaf.h Merge branch 'xfs-4.10-misc-fixes-3' into for-next 2016-12-07 17:42:30 +11:00
xfs_attr_remote.c xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_attr_remote.h
xfs_attr_sf.h xfs: move struct xfs_attr_shortform to xfs_da_format.h 2016-02-08 15:00:01 +11:00
xfs_attr.c xfs: remove racy hasattr check from attr ops 2017-01-25 07:53:43 -08:00
xfs_bit.c libxfs: Optimize the loop for xfs_bitmap_empty 2016-01-04 16:10:19 +11:00
xfs_bit.h
xfs_bmap_btree.c xfs: remove boilerplate around xfs_btree_init_block 2017-01-30 16:32:24 -08:00
xfs_bmap_btree.h
xfs_bmap.c xfs: allow unwritten extents in the CoW fork 2017-02-02 15:14:01 -08:00
xfs_bmap.h xfs: fix COW writeback race 2017-01-23 10:55:07 -08:00
xfs_btree.c xfs: filter out obviously bad btree pointers 2017-02-02 15:13:58 -08:00
xfs_btree.h xfs: filter out obviously bad btree pointers 2017-02-02 15:13:58 -08:00
xfs_cksum.h xfs: optimise CRC updates 2016-12-05 14:40:32 +11:00
xfs_da_btree.c xfs: fail _dir_open when readahead fails 2017-02-02 15:13:58 -08:00
xfs_da_btree.h xfs: fail _dir_open when readahead fails 2017-02-02 15:13:58 -08:00
xfs_da_format.c xfs: kill xfs_dir2_inou_t 2016-07-20 11:48:31 +10:00
xfs_da_format.h xfs: fix attr shortform structure alignment on cris 2016-08-03 10:59:42 +10:00
xfs_defer.c xfs: defer should abort intent items if the trans roll fails 2016-10-24 14:21:18 +11:00
xfs_defer.h xfs: implement deferred bmbt map/unmap operations 2016-10-04 11:05:44 -07:00
xfs_dir2_block.c xfs: print name of verifier if it fails 2016-01-04 16:10:19 +11:00
xfs_dir2_data.c Merge branch 'xfs-4.10-misc-fixes-3' into for-next 2016-12-07 17:42:30 +11:00
xfs_dir2_leaf.c xfs: print name of verifier if it fails 2016-01-04 16:10:19 +11:00
xfs_dir2_node.c xfs: verify free block header fields 2017-02-02 15:14:00 -08:00
xfs_dir2_priv.h xfs: move dir_ino_validate declaration per xfsprogs 2016-11-08 11:59:12 +11:00
xfs_dir2_sf.c xfs: kill xfs_dir2_inou_t 2016-07-20 11:48:31 +10:00
xfs_dir2.c xfs: fix xfs_mode_to_ftype() prototype 2017-01-18 12:39:21 -08:00
xfs_dir2.h xfs: fix xfs_mode_to_ftype() prototype 2017-01-18 12:39:21 -08:00
xfs_dquot_buf.c libxfs: clean up _calc_dquots_per_chunk 2016-10-20 15:46:18 +11:00
xfs_format.h libxfs: v3 inodes are only valid on crc-enabled filesystems 2016-10-20 15:48:38 +11:00
xfs_fs.h xfs: create a separate cow extent size hint for the allocator 2016-10-05 16:26:26 -07:00
xfs_ialloc_btree.c xfs: use per-AG reservations for the finobt 2017-01-25 07:49:35 -08:00
xfs_ialloc_btree.h xfs: use per-AG reservations for the finobt 2017-01-25 07:49:35 -08:00
xfs_ialloc.c Merge branch 'xfs-4.10-misc-fixes-3' into for-next 2016-12-07 17:42:30 +11:00
xfs_ialloc.h xfs: rename flist/free_list to dfops 2016-08-03 11:19:29 +10:00
xfs_inode_buf.c xfs: sanity check inode di_mode 2017-01-17 11:42:22 -08:00
xfs_inode_buf.h libxfs: convert ushort to unsigned short 2016-11-08 11:55:48 +11:00
xfs_inode_fork.c xfs: check for obviously bad level values in the bmbt root 2017-02-02 15:13:59 -08:00
xfs_inode_fork.h xfs: new inode extent list lookup helpers 2016-11-24 11:39:32 +11:00
xfs_log_format.h libxfs: convert ushort to unsigned short 2016-11-08 11:55:48 +11:00
xfs_log_recover.h xfs: remove unused struct declarations 2017-01-30 16:32:25 -08:00
xfs_log_rlimit.c xfs: move most of xfs_sb.h to xfs_format.h 2014-11-28 14:27:09 +11:00
xfs_quota_defs.h xfs: wire up Q_XGETNEXTQUOTA / get_nextdqblk 2016-02-08 11:27:38 +11:00
xfs_refcount_btree.c xfs: use the actual AG length when reserving blocks 2017-01-03 18:39:33 -08:00
xfs_refcount_btree.h xfs: use the actual AG length when reserving blocks 2017-01-03 18:39:33 -08:00
xfs_refcount.c xfs: rework refcount cow recovery error handling 2016-10-10 17:23:07 +11:00
xfs_refcount.h xfs: store in-progress CoW allocations in the refcount btree 2016-10-05 16:26:05 -07:00
xfs_rmap_btree.c xfs: use the actual AG length when reserving blocks 2017-01-03 18:39:33 -08:00
xfs_rmap_btree.h xfs: use the actual AG length when reserving blocks 2017-01-03 18:39:33 -08:00
xfs_rmap.c xfs: convert unwritten status of reverse mappings for shared files 2016-10-05 16:26:29 -07:00
xfs_rmap.h xfs: use interval query for rmap alloc operations on shared files 2016-10-05 16:26:29 -07:00
xfs_rtbitmap.c libxfs: fix whitespace problems 2016-11-08 11:56:13 +11:00
xfs_sb.c xfs: verify dirblocklog correctly 2017-01-24 12:23:33 -08:00
xfs_sb.h xfs: remove unused function definitions 2016-02-08 14:58:07 +11:00
xfs_shared.h xfs: define the on-disk refcount btree format 2016-10-03 09:11:18 -07:00
xfs_symlink_remote.c xfs: print name of verifier if it fails 2016-01-04 16:10:19 +11:00
xfs_trans_resv.c xfs: increase log reservations for reflink 2016-10-05 16:26:29 -07:00
xfs_trans_resv.h xfs: increase log reservations for reflink 2016-10-05 16:26:29 -07:00
xfs_trans_space.h xfs: implement swapext for rmap filesystems 2016-10-05 16:26:32 -07:00
xfs_types.h Merge branch 'xfs-4.10-extent-lookup' into for-next 2016-11-24 11:41:59 +11:00