Mark Fasheh f441460202 btrfs: fix deadlock with extent-same and readpage ... ->readpage() does page_lock() before extent_lock(), we do the opposite in extent-same. We want to reverse the order in btrfs_extent_same() but it's not quite straightforward since the page locks are taken inside btrfs_cmp_data(). So I split btrfs_cmp_data() into 3 parts with a small context structure that is passed between them. The first, btrfs_cmp_data_prepare() gathers up the pages needed (taking page lock as required) and puts them on our context structure. At this point, we are safe to lock the extent range. Afterwards, we use btrfs_cmp_data() to do the data compare as usual and btrfs_cmp_data_free() to clean up our context. Signed-off-by: Mark Fasheh <mfasheh@suse.de> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>		2015-07-01 17:17:14 -07:00
..
tests	btrfs: qgroup: Switch self test to extent-oriented qgroup mechanism.	2015-06-10 09:26:05 -07:00
acl.c	btrfs: remove useless ACL check	2014-06-09 17:20:42 -07:00
async-thread.c	btrfs: Fix lockdep warning of wr_ctx->wr_lock in scrub_free_wr_ctx()	2015-06-10 07:04:52 -07:00
async-thread.h	btrfs: Fix lockdep warning of wr_ctx->wr_lock in scrub_free_wr_ctx()	2015-06-10 07:04:52 -07:00
backref.c	btrfs: backref: Add special time_seq == (u64)-1 case for	2015-06-10 09:25:45 -07:00
backref.h	btrfs: cleanup, remove inode_item_info helper	2015-01-14 19:23:47 +01:00
btrfs_inode.h	Btrfs: fix metadata inconsistencies after directory fsync	2015-03-26 17:56:23 -07:00
check-integrity.c	Merge branch 'cleanups-post-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.1	2015-03-25 10:52:48 -07:00
check-integrity.h	block: submit_bio_wait() conversions	2013-11-24 16:33:41 -07:00
compression.c	Merge branch 'cleanups-post-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.1	2015-03-25 10:52:48 -07:00
compression.h	btrfs: constify structs with op functions or static definitions	2015-02-16 18:48:44 +01:00
ctree.c	Btrfs: fix up read_tree_block to return proper error	2015-06-03 04:03:08 -07:00
ctree.h	Btrfs: fix race between balance and unused block group deletion	2015-06-30 14:36:46 -07:00
delayed-inode.c	Btrfs: fill ->last_trans for delayed inode in btrfs_fill_inode.	2015-04-26 06:27:03 -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: delayed-ref: double free in btrfs_add_delayed_tree_ref()	2015-06-24 12:28:03 -07:00
delayed-ref.h	btrfs: qgroup: Add the ability to skip given qgroup for old/new_roots.	2015-06-10 09:26:23 -07:00
dev-replace.c	Btrfs: sysfs: add support to show replacing target in the sysfs	2015-06-19 14:03:54 +02:00
dev-replace.h
dir-item.c	Btrfs: make xattr replace operations atomic	2014-11-20 17:20:07 -08:00
disk-io.c	Btrfs: fix crash on close_ctree() if cleaner starts new transaction	2015-06-30 14:36:46 -07:00
disk-io.h	Btrfs: disk-io: replace root args iff only fs_info used	2015-02-16 18:48:43 +01:00
export.c	VFS: normal filesystems (and lustre): d_inode() annotations	2015-04-15 15:06:57 -04:00
export.h
extent_io.c	Btrfs: set UNWRITTEN for prealloc'ed extents in fiemap	2015-06-03 04:03:03 -07:00
extent_io.h	btrfs: constify structs with op functions or static definitions	2015-02-16 18:48:44 +01:00
extent_map.c	Btrfs: do not move em to modified list when unpinning	2014-11-21 11:59:54 -08:00
extent_map.h	Btrfs: fix NULL pointer crash when running balance and scrub concurrently	2014-06-19 14:20:55 -07:00
extent-tree.c	Btrfs: fix race between balance and unused block group deletion	2015-06-30 14:36:46 -07:00
extent-tree.h	btrfs: qgroup: Add new qgroup calculation function	2015-06-10 09:25:49 -07:00
file-item.c	Merge branch 'cleanups-post-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.1	2015-03-25 10:52:48 -07:00
file.c	Btrfs: avoid syncing log in the fast fsync path when not necessary	2015-06-10 07:02:43 -07:00
free-space-cache.c	Btrfs: fix mutex unlock without prior lock on space cache truncation	2015-06-02 19:34:34 -07:00
free-space-cache.h	Btrfs: allow block group cache writeout outside critical section in commit	2015-04-10 14:07:22 -07:00
hash.c	btrfs: LLVMLinux: Remove VLAIS	2014-10-14 10:51:22 +02:00
hash.h	Btrfs: fix btrfs boot when compiled as built-in	2014-01-28 13:20:31 -08:00
inode-item.c	Btrfs: fix fsync log replay for inodes with a mix of regular refs and extrefs	2015-01-21 18:02:05 -08:00
inode-map.c	Btrfs: fix race between caching kthread and returning inode to inode cache	2015-06-30 14:36:46 -07:00
inode-map.h
inode.c	Btrfs: fix hang during inode eviction due to concurrent readahead	2015-06-03 04:03:09 -07:00
ioctl.c	btrfs: fix deadlock with extent-same and readpage	2015-07-01 17:17:14 -07:00
Kconfig	rcu: Make SRCU optional by using CONFIG_SRCU	2015-01-06 11:04:29 -08:00
locking.c	btrfs: fix lockups from btrfs_clear_path_blocking	2014-11-19 10:34:35 -08:00
locking.h	btrfs: fix lockups from btrfs_clear_path_blocking	2014-11-19 10:34:35 -08:00
lzo.c	btrfs: constify structs with op functions or static definitions	2015-02-16 18:48:44 +01:00
Makefile	Btrfs: add sanity tests for new qgroup accounting code	2014-06-09 17:20:49 -07:00
math.h	btrfs: cleanup 64bit/32bit divs, compile time constants	2015-03-03 17:23:57 +01:00
ordered-data.c	Btrfs: don't attach unnecessary extents to transaction on fsync	2015-06-10 07:02:44 -07:00
ordered-data.h	Btrfs: avoid syncing log in the fast fsync path when not necessary	2015-06-10 07:02:43 -07:00
orphan.c	btrfs: kill the key type accessor helpers	2014-09-17 13:37:12 -07:00
print-tree.c	btrfs: remove parameter blocksize from read_tree_block	2014-10-02 17:14:50 +02:00
print-tree.h
props.c	btrfs: constify structs with op functions or static definitions	2015-02-16 18:48:44 +01:00
props.h	Btrfs: add support for inode properties	2014-01-28 13:20:24 -08:00
qgroup.c	btrfs: qgroup: allow user to clear the limitation on qgroup	2015-06-30 13:20:00 -07:00
qgroup.h	btrfs: qgroup: Cleanup the old ref_node-oriented mechanism.	2015-06-10 09:26:11 -07:00
raid56.c	Merge branch 'cleanups-post-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.1	2015-03-25 10:52:48 -07:00
raid56.h	Btrfs: Make raid_map array be inlined in btrfs_bio structure	2015-01-21 18:06:47 -08:00
rcu-string.h
reada.c	Btrfs: add ref_count and free function for btrfs_bio	2015-01-21 18:06:48 -08:00
relocation.c	Btrfs: fix up read_tree_block to return proper error	2015-06-03 04:03:08 -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: add error handling for scrub_workers_get()	2015-06-30 13:20:03 -07:00
send.c	Btrfs: use received_uuid of parent during send	2015-06-12 13:20:38 -07:00
send.h
struct-funcs.c
super.c	Btrfs: show subvol= and subvolid= in /proc/mounts	2015-06-03 04:03:02 -07:00
sysfs.c	Btrfs: Check if kobject is initialized before put	2015-06-22 14:43:31 +02:00
sysfs.h	Btrfs: sysfs: btrfs_sysfs_remove_fsid() make it non static	2015-05-27 12:27:22 +02:00
transaction.c	btrfs: qgroup: Make snapshot accounting work with new extent-oriented	2015-06-10 09:26:29 -07:00
transaction.h	btrfs: qgroup: Add the ability to skip given qgroup for old/new_roots.	2015-06-10 09:26:23 -07:00
tree-defrag.c	btrfs: let tree defrag work in SSD mode	2015-06-02 19:34:33 -07:00
tree-log.c	Btrfs: fix fsync after truncate when no_holes feature is enabled	2015-07-01 17:17:12 -07:00
tree-log.h	Btrfs: fix metadata inconsistencies after directory fsync	2015-03-26 17:56:23 -07:00
ulist.c	btrfs: ulist: Add ulist_del() function.	2015-06-10 09:26:17 -07:00
ulist.h	btrfs: ulist: Add ulist_del() function.	2015-06-10 09:26:17 -07:00
uuid-tree.c	Btrfs: make btrfs_search_forward return with nodes unlocked	2014-09-17 13:38:02 -07:00
volumes.c	Btrfs: fix race between balance and unused block group deletion	2015-06-30 14:36:46 -07:00
volumes.h	Btrfs: sysfs: add pointer to access fs_info from fs_devices	2015-05-27 12:27:21 +02:00
xattr.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
xattr.h	btrfs: use generic posix ACL infrastructure	2014-01-25 23:58:18 -05:00
zlib.c	btrfs: constify structs with op functions or static definitions	2015-02-16 18:48:44 +01:00