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linux/fs/btrfs
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Miao Xie aec8030a87 Btrfs: fix wrong handle at error path of create_snapshot() when the commit fails 
There are several bugs at error path of create_snapshot() when the
transaction commitment failed.
- access the freed transaction handler. At the end of the
  transaction commitment, the transaction handler was freed, so we
  should not access it after the transaction commitment.
- we were not aware of the error which happened during the snapshot
  creation if we submitted a async transaction commitment.
- pending snapshot access vs pending snapshot free. when something
  wrong happened after we submitted a async transaction commitment,
  the transaction committer would cleanup the pending snapshots and
  free them. But the snapshot creators were not aware of it, they
  would access the freed pending snapshots.

This patch fixes the above problems by:
- remove the dangerous code that accessed the freed handler
- assign ->error if the error happens during the snapshot creation
- the transaction committer doesn't free the pending snapshots,
  just assigns the error number and evicts them before we unblock
  the transaction.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:22 -05:00
..
acl.c Btrfs: skip adding an acl attribute if we don't have to 2012-12-16 20:46:15 -05:00
async-thread.c Btrfs: call the ordered free operation without any locks held 2012-07-25 16:15:07 -04:00
async-thread.h
backref.c Btrfs: fix backref walking race with tree deletions 2013-02-26 11:00:50 -05:00
backref.h Btrfs: move fs/btrfs/ioctl.h to include/uapi/linux/btrfs.h 2013-02-20 09:37:28 -05:00
btrfs_inode.h Btrfs: serialize unlocked dio reads with truncate 2013-02-20 12:59:47 -05:00
check-integrity.c btrfs: define BTRFS_MAGIC as a u64 value 2013-02-20 13:00:01 -05:00
check-integrity.h
compat.h
compression.c Btrfs: add rw argument to merge_bio_hook() 2013-02-01 11:49:47 -05:00
compression.h
ctree.c btrfs: remove cache only arguments from defrag path 2013-02-20 12:59:36 -05:00
ctree.h Btrfs: fix wrong reserved space in qgroup during snap/subv creation 2013-02-28 13:33:54 -05:00
delayed-inode.c btrfs: remove unused "item" in btrfs_insert_delayed_item() 2013-02-20 12:59:23 -05:00
delayed-inode.h Btrfs: fix lots of orphan inodes when the space is not enough 2013-02-20 09:36:39 -05:00
delayed-ref.c Btrfs: make delayed ref lock logic more readable 2013-02-20 09:36:41 -05:00
delayed-ref.h Merge branch 'raid56-experimental' into for-linus-3.9 2013-02-20 14:06:05 -05:00
dev-replace.c Btrfs: check the return value of btrfs_start_delalloc_inodes() 2013-02-20 09:37:21 -05:00
dev-replace.h Btrfs: add new sources for device replace code 2012-12-12 17:15:41 -05:00
dir-item.c Btrfs: fix hash overflow handling 2012-12-17 14:48:21 -05:00
disk-io.c Btrfs: fix wrong handle at error path of create_snapshot() when the commit fails 2013-03-04 16:33:22 -05:00
disk-io.h Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
export.c
export.h
extent-tree.c Btrfs: cleanup to make the function btrfs_delalloc_reserve_metadata more logic 2013-03-01 10:13:04 -05:00
extent_io.c btrfs: fixup/remove module.h usage as required 2013-03-01 15:01:01 -05:00
extent_io.h btrfs: use only inline_pages from extent buffer 2013-02-28 13:33:56 -05:00
extent_map.c btrfs: fixup/remove module.h usage as required 2013-03-01 15:01:01 -05:00
extent_map.h Btrfs: do not allow logged extents to be merged or removed 2013-01-24 12:49:48 -05:00
file-item.c Btrfs: extend the checksum item as much as possible 2013-02-20 12:59:37 -05:00
file.c btrfs: cleanup for open-coded alignment 2013-02-26 11:04:13 -05:00
free-space-cache.c Merge branch 'raid56-experimental' into for-linus-3.9 2013-02-20 14:06:05 -05:00
free-space-cache.h
hash.h btrfs: extended inode refs 2012-10-09 09:14:45 -04:00
inode-item.c btrfs: extended inode refs 2012-10-09 09:14:45 -04:00
inode-map.c Btrfs: improve the noflush reservation 2012-12-11 13:31:31 -05:00
inode-map.h
inode.c Btrfs: copy everything if we've created an inline extent 2013-02-28 13:33:20 -05:00
ioctl.c Btrfs: fix wrong handle at error path of create_snapshot() when the commit fails 2013-03-04 16:33:22 -05:00
Kconfig Btrfs: select XOR_BLOCKS in Kconfig 2013-02-05 09:55:30 -05:00
locking.c Btrfs: save us a read_lock 2013-02-20 09:37:17 -05:00
locking.h
lzo.c
Makefile Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
math.h Btrfs: cleanup duplicated division functions 2012-12-11 13:31:30 -05:00
ordered-data.c Btrfs: place ordered operations on a per transaction list 2013-02-20 12:59:57 -05:00
ordered-data.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next into for-linus-3.9 2013-02-20 14:05:45 -05:00
orphan.c
print-tree.c btrfs: add missing break in btrfs_print_leaf() 2013-02-20 12:59:20 -05:00
print-tree.h
qgroup.c Btrfs: remove reduplicate check about root in the function btrfs_clean_quota_tree 2013-03-01 10:13:04 -05:00
raid56.c btrfs/raid56: Add missing #include <linux/vmalloc.h> 2013-03-03 06:53:41 -05:00
raid56.h Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
rcu-string.h Btrfs: use rcu to protect device->name 2012-06-14 21:29:16 -04:00
reada.c Btrfs: introduce GET_READ_MIRRORS functionality for btrfs_map_block() 2012-12-12 17:15:43 -05:00
relocation.c Btrfs: use wrapper page_offset 2013-02-20 09:36:43 -05:00
root-tree.c Btrfs: rename root_times_lock to root_item_lock 2012-12-16 20:46:21 -05:00
scrub.c Merge branch 'raid56-experimental' into for-linus-3.9 2013-02-20 14:06:05 -05:00
send.c btrfs: add "no file data" flag to btrfs send ioctl 2013-02-20 12:59:39 -05:00
send.h btrfs: add "no file data" flag to btrfs send ioctl 2013-02-20 12:59:39 -05:00
struct-funcs.c Btrfs: rewrite BTRFS_SETGET_FUNCS 2012-07-23 16:28:06 -04:00
super.c Btrfs: fix remount vs autodefrag 2013-02-21 08:11:43 -05:00
sysfs.c btrfs: fixup/remove module.h usage as required 2013-03-01 15:01:01 -05:00
transaction.c Btrfs: fix wrong handle at error path of create_snapshot() when the commit fails 2013-03-04 16:33:22 -05:00
transaction.h Btrfs: fix wrong reserved space in qgroup during snap/subv creation 2013-02-28 13:33:54 -05:00
tree-defrag.c btrfs: remove cache only arguments from defrag path 2013-02-20 12:59:36 -05:00
tree-log.c Btrfs: use set_nlink if our i_nlink is 0 2013-03-04 16:30:06 -05:00
tree-log.h
ulist.c btrfs: fixup/remove module.h usage as required 2013-03-01 15:01:01 -05:00
ulist.h Btrfs: make aux field of ulist 64 bit 2012-10-01 15:18:53 -04:00
version.h
volumes.c btrfs: remove a printk from scan_one_device 2013-02-28 13:33:52 -05:00
volumes.h Merge branch 'raid56-experimental' into for-linus-3.9 2013-02-20 14:06:05 -05:00
xattr.c Btrfs: only log the inode item if we can get away with it 2012-12-16 20:46:21 -05:00
xattr.h
zlib.c btrfs: fix message printing 2012-10-09 09:19:57 -04:00