Darrick J. Wong 174edb0e46 xfs: store in-progress CoW allocations in the refcount btree ... Due to the way the CoW algorithm in XFS works, there's an interval during which blocks allocated to handle a CoW can be lost -- if the FS goes down after the blocks are allocated but before the block remapping takes place. This is exacerbated by the cowextsz hint -- allocated reservations can sit around for a while, waiting to get used. Since the refcount btree doesn't normally store records with refcount of 1, we can use it to record these in-progress extents. In-progress blocks cannot be shared because they're not user-visible, so there shouldn't be any conflicts with other programs. This is a better solution than holding EFIs during writeback because (a) EFIs can't be relogged currently, (b) even if they could, EFIs are bound by available log space, which puts an unnecessary upper bound on how much CoW we can have in flight, and (c) we already have a mechanism to track blocks. At mount time, read the refcount records and free anything we find with a refcount of 1 because those were in-progress when the FS went down. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>		2016-10-05 16:26:05 -07:00
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xfs_ag_resv.c	xfs: set up per-AG free space reservations	2016-09-19 10:30:52 +10:00
xfs_ag_resv.h	xfs: set up per-AG free space reservations	2016-09-19 10:30:52 +10:00
xfs_alloc_btree.c	xfs: remove the get*keys and update_keys btree ops pointers	2016-08-03 12:22:12 +10:00
xfs_alloc_btree.h
xfs_alloc.c	xfs: reserve AG space for the refcount btree root	2016-10-03 09:11:24 -07:00
xfs_alloc.h	Merge branch 'xfs-4.9-log-recovery-fixes' into for-next	2016-10-03 09:56:28 +11:00
xfs_attr_leaf.c	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_attr_leaf.h	xfs: make several functions static	2016-06-01 17:38:15 +10:00
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: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
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: introduce the CoW fork	2016-10-04 18:06:40 -07:00
xfs_bmap_btree.h
xfs_bmap.c	xfs: store in-progress CoW allocations in the refcount btree	2016-10-05 16:26:05 -07:00
xfs_bmap.h	xfs: support removing extents from CoW fork	2016-10-05 13:55:40 -07:00
xfs_btree.c	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_btree.h	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_cksum.h
xfs_da_btree.c	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_da_btree.h	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
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 allow ->finish_item to request a new transaction	2016-09-19 10:26:25 +10:00
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	xfs: print name of verifier if it fails	2016-01-04 16:10:19 +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: always set rvalp in xfs_dir2_node_trim_free	2016-03-15 11:44:18 +11:00
xfs_dir2_priv.h	xfs: move type conversion functions to xfs_dir.h	2014-12-04 09:43:17 +11:00
xfs_dir2_sf.c	xfs: kill xfs_dir2_inou_t	2016-07-20 11:48:31 +10:00
xfs_dir2.c	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_dir2.h	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_dquot_buf.c	xfs: handle dquot buffer readahead in log recovery correctly	2016-01-12 07:04:01 +11:00
xfs_format.h	xfs: store in-progress CoW allocations in the refcount btree	2016-10-05 16:26:05 -07:00
xfs_fs.h	xfs: add reflink feature flag to geometry	2016-10-04 18:06:40 -07:00
xfs_ialloc_btree.c	xfs: set up per-AG free space reservations	2016-09-19 10:30:52 +10:00
xfs_ialloc_btree.h	xfs: allocate sparse inode chunks on full chunk allocation failure	2015-05-29 09:18:32 +10:00
xfs_ialloc.c	xfs: add owner field to extent allocation and freeing	2016-08-03 11:33:42 +10:00
xfs_ialloc.h	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_inode_buf.c	xfs: rework xfs_bmap_free callers to use xfs_defer_ops	2016-08-03 11:15:38 +10:00
xfs_inode_buf.h	xfs: mode di_mode to vfs inode	2016-02-09 16:54:58 +11:00
xfs_inode_fork.c	xfs: introduce the CoW fork	2016-10-04 18:06:40 -07:00
xfs_inode_fork.h	xfs: introduce the CoW fork	2016-10-04 18:06:40 -07:00
xfs_log_format.h	xfs: create bmbt update intent log items	2016-10-04 11:05:43 -07:00
xfs_log_recover.h	xfs: support a crc verification only log record pass	2016-01-04 15:55:10 +11:00
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: add refcount btree operations	2016-10-03 09:11:19 -07:00
xfs_refcount_btree.h	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_refcount.c	xfs: store in-progress CoW allocations in the refcount btree	2016-10-05 16:26:05 -07:00
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: introduce refcount btree definitions	2016-10-03 09:11:16 -07:00
xfs_rmap_btree.h	xfs: support overlapping intervals in the rmap btree	2016-08-03 11:40:56 +10:00
xfs_rmap.c	xfs: introduce the CoW fork	2016-10-04 18:06:40 -07:00
xfs_rmap.h	xfs: propagate bmap updates to rmapbt	2016-08-03 12:16:05 +10:00
xfs_rtbitmap.c	xfs: make several functions static	2016-06-01 17:38:15 +10:00
xfs_sb.c	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
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: account for the refcount btree in the alloc/free log reservation	2016-10-03 09:11:19 -07:00
xfs_trans_resv.h	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_trans_space.h	xfs: clean up XFS_MIN_FREELIST macros	2015-06-22 10:13:30 +10:00
xfs_types.h	xfs: introduce the CoW fork	2016-10-04 18:06:40 -07:00