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ea4ebde02e
linux/fs/btrfs
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Chris Mason ea4ebde02e Btrfs: fix deadlocks with trylock on tree nodes 
The Btrfs tree trylock function is poorly named.  It always takes
the spinlock and backs off if the blocking lock is held.  This
can lead to surprising lockups because people expect it to really be a
trylock.

This commit makes it a pure trylock, both for the spinlock and the
blocking lock.  It also reworks the nested lock handling slightly to
avoid taking the read lock while a spinning write lock might be held.

Signed-off-by: Chris Mason <clm@fb.com>
2014-06-19 14:19:55 -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: make fsync work after cloning into a file 2014-06-09 17:21:16 -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: new function read_extent_buffer_to_user 2014-06-12 18:21:56 -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: allocate raid type kobjects dynamically 2014-06-09 17:21:01 -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: break up __btrfs_write_out_cache to cut down stack usage 2014-06-09 17:20:55 -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: make fsync work after cloning into a file 2014-06-09 17:21:16 -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
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