Miao Xie e570fd27f2 Btrfs: fix broken free space cache after the system crashed ... When we mounted the filesystem after the crash, we got the following message: BTRFS error (device xxx): block group xxxx has wrong amount of free space BTRFS error (device xxx): failed to load free space cache for block group xxx It is because we didn't update the metadata of the allocated space (in extent tree) until the file data was written into the disk. During this time, there was no information about the allocated spaces in either the extent tree nor the free space cache. when we wrote out the free space cache at this time (commit transaction), those spaces were lost. In fact, only the free space that is used to store the file data had this problem, the others didn't because the metadata of them is updated in the same transaction context. There are many methods which can fix the above problem - track the allocated space, and write it out when we write out the free space cache - account the size of the allocated space that is used to store the file data, if the size is not zero, don't write out the free space cache. The first one is complex and may make the performance drop down. This patch chose the second method, we use a per-block-group variant to account the size of that allocated space. Besides that, we also introduce a per-block-group read-write semaphore to avoid the race between the allocation and the free space cache write out. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>		2014-06-19 14:20:54 -07:00
..
tests	Btrfs: fix qgroups sanity test crash or hang	2014-06-13 09:52:24 -07:00
acl.c	btrfs: remove useless ACL check	2014-06-09 17:20:42 -07:00
async-thread.c	btrfs: fix crash in remount(thread_pool=) case	2014-04-07 10:41:52 -07:00
async-thread.h	btrfs: Add trace for btrfs_workqueue alloc/destroy	2014-03-20 17:15:28 -07:00
backref.c	Btrfs: fix scrub_print_warning to handle skinny metadata extents	2014-06-09 17:21:17 -07:00
backref.h	Btrfs: fix scrub_print_warning to handle skinny metadata extents	2014-06-09 17:21:17 -07:00
btrfs_inode.h	btrfs: Drop EXTENT_UPTODATE check in hole punching and direct locking	2014-06-09 17:20:57 -07:00
check-integrity.c	btrfs: check_int: propagate out-of-memory error upwards	2014-06-09 17:20:21 -07:00
check-integrity.h	block: submit_bio_wait() conversions	2013-11-24 16:33:41 -07:00
compression.c	btrfs: return ptr error from compression workspace	2014-06-09 17:20:22 -07:00
compression.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
ctree.c	Btrfs: fix leaf corruption after __btrfs_drop_extents	2014-06-09 17:21:10 -07:00
ctree.h	Btrfs: fix broken free space cache after the system crashed	2014-06-19 14:20:54 -07:00
delayed-inode.c	btrfs: free delayed node outside of root->inode_lock	2014-06-09 17:21:08 -07:00
delayed-inode.h	Btrfs: introduce the delayed inode ref deletion for the single link inode	2014-01-28 13:20:09 -08:00
delayed-ref.c	Btrfs: rework qgroup accounting	2014-06-09 17:20:48 -07:00
delayed-ref.h	Btrfs: rework qgroup accounting	2014-06-09 17:20:48 -07:00
dev-replace.c	btrfs: replace EINVAL with EOPNOTSUPP for dev_replace raid56	2014-06-09 17:21:12 -07:00
dev-replace.h	Btrfs: add new sources for device replace code	2012-12-12 17:15:41 -05:00
dir-item.c	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00
disk-io.c	Btrfs: async delayed refs	2014-06-09 17:20:58 -07:00
disk-io.h	Btrfs: add sanity tests for new qgroup accounting code	2014-06-09 17:20:49 -07:00
export.c	btrfs: remove fs/btrfs/compat.h	2013-11-11 22:03:19 -05:00
export.h
extent_io.c	btrfs: fix use of uninit "ret" in end_extent_writepage()	2014-06-13 09:52:28 -07:00
extent_io.h	Btrfs: remove unused wait queue in struct extent_buffer	2014-06-19 14:20:28 -07:00
extent_map.c	Btrfs: more efficient btrfs_drop_extent_cache	2014-03-10 15:16:57 -04:00
extent_map.h	Btrfs: more efficient btrfs_drop_extent_cache	2014-03-10 15:16:57 -04:00
extent-tree.c	Btrfs: fix broken free space cache after the system crashed	2014-06-19 14:20:54 -07:00
file-item.c	Btrfs: make fsync work after cloning into a file	2014-06-09 17:21:16 -07:00
file.c	Btrfs: fix transaction leak during fsync call	2014-06-09 17:21:06 -07:00
free-space-cache.c	Btrfs: fix broken free space cache after the system crashed	2014-06-19 14:20:54 -07:00
free-space-cache.h	Btrfs: remove path arg from btrfs_truncate_free_space_cache	2013-11-11 21:51:33 -05:00
hash.c	Btrfs: fix btrfs boot when compiled as built-in	2014-01-28 13:20:31 -08:00
hash.h	Btrfs: fix btrfs boot when compiled as built-in	2014-01-28 13:20:31 -08:00
inode-item.c	btrfs: cleanup: removed unused 'btrfs_get_inode_ref_index'	2014-01-28 13:19:39 -08:00
inode-map.c	btrfs: remove newline from inode cache kthread name	2014-06-09 17:20:53 -07:00
inode-map.h
inode.c	Btrfs: fix broken free space cache after the system crashed	2014-06-19 14:20:54 -07:00
ioctl.c	btrfs: new ioctl TREE_SEARCH_V2	2014-06-13 09:52:19 -07:00
Kconfig	Btrfs: fix btrfs boot when compiled as built-in	2014-01-28 13:20:31 -08:00
locking.c	Btrfs: fix deadlocks with trylock on tree nodes	2014-06-19 14:19:55 -07:00
locking.h	Btrfs: remove btrfs_try_spin_lock	2013-03-14 14:57:10 -04:00
lzo.c	btrfs: return errno instead of -1 from compression	2014-06-09 17:20:21 -07:00
Makefile	Btrfs: add sanity tests for new qgroup accounting code	2014-06-09 17:20:49 -07:00
math.h	Btrfs: cleanup duplicated division functions	2012-12-11 13:31:30 -05:00
ordered-data.c	btrfs: remove stale newlines from log messages	2014-06-09 17:20:53 -07:00
ordered-data.h	btrfs: Cleanup the "_struct" suffix in btrfs_workequeue	2014-03-10 15:17:16 -04:00
orphan.c	btrfs: expand btrfs_find_item() to include find_orphan_item functionality	2014-01-28 13:19:37 -08:00
print-tree.c	Btrfs: don't use ram_bytes for uncompressed inline items	2014-01-29 07:06:29 -08:00
print-tree.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
props.c	Btrfs: add support for inode properties	2014-01-28 13:20:24 -08:00
props.h	Btrfs: add support for inode properties	2014-01-28 13:20:24 -08:00
qgroup.c	btrfs: free ulist in qgroup_shared_accounting() error path	2014-06-13 09:52:26 -07:00
qgroup.h	Btrfs: rework qgroup accounting	2014-06-09 17:20:48 -07:00
raid56.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2014-04-04 15:31:36 -07:00
raid56.h	Btrfs: RAID5 and RAID6	2013-02-01 14:24:23 -05:00
rcu-string.h
reada.c	Btrfs: fix unfinished readahead thread for raid5/6 degraded mounting	2014-06-13 09:52:21 -07:00
relocation.c	btrfs: remove stale newlines from log messages	2014-06-09 17:20:53 -07:00
root-tree.c	Btrfs: use bitfield instead of integer data type for the some variants in btrfs_root	2014-06-09 17:20:40 -07:00
scrub.c	Btrfs: fix scrub_print_warning to handle skinny metadata extents	2014-06-09 17:21:17 -07:00
send.c	Btrfs: send, use the right limits for xattr names and values	2014-06-09 17:21:00 -07:00
send.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
struct-funcs.c	Btrfs: rewrite BTRFS_SETGET_FUNCS	2012-07-23 16:28:06 -04:00
super.c	btrfs: remove stale newlines from log messages	2014-06-09 17:20:53 -07:00
sysfs.c	btrfs: allocate raid type kobjects dynamically	2014-06-09 17:21:01 -07:00
sysfs.h	btrfs: add simple debugfs interface	2014-03-10 15:15:51 -04:00
transaction.c	btrfs: fix error handling in create_pending_snapshot	2014-06-13 09:52:30 -07:00
transaction.h	Btrfs: add sanity tests for new qgroup accounting code	2014-06-09 17:20:49 -07:00
tree-defrag.c	Btrfs: use bitfield instead of integer data type for the some variants in btrfs_root	2014-06-09 17:20:40 -07:00
tree-log.c	Btrfs: use helpers for last_trans_log_full_commit instead of opencode	2014-06-09 17:20:45 -07:00
tree-log.h	Btrfs: use helpers for last_trans_log_full_commit instead of opencode	2014-06-09 17:20:45 -07:00
ulist.c	Btrfs: do not export ulist functions	2014-01-29 07:06:27 -08:00
ulist.h	Btrfs: do not export ulist functions	2014-01-29 07:06:27 -08:00
uuid-tree.c	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00
volumes.c	fs: btrfs: volumes.c: Fix for possible null pointer dereference	2014-06-09 17:21:01 -07:00
volumes.h	btrfs: balance filter: add limit of processed chunks	2014-06-09 17:20:26 -07:00
xattr.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2014-01-30 20:08:20 -08:00
xattr.h	btrfs: use generic posix ACL infrastructure	2014-01-25 23:58:18 -05:00
zlib.c	btrfs: return errno instead of -1 from compression	2014-06-09 17:20:21 -07:00