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linux/fs/btrfs
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Stefan Behrens 115930cb2d Btrfs: fix wrong write offset when replacing a device 
Miao Xie reported the following issue:

The filesystem was corrupted after we did a device replace.

Steps to reproduce:
 # mkfs.btrfs -f -m single -d raid10 <device0>..<device3>
 # mount <device0> <mnt>
 # btrfs replace start -rfB 1 <device4> <mnt>
 # umount <mnt>
 # btrfsck <device4>

The reason for the issue is that we changed the write offset by mistake,
introduced by commit 625f1c8dc.

We read the data from the source device at first, and then write the
data into the corresponding place of the new device. In order to
implement the "-r" option, the source location is remapped using
btrfs_map_block(). The read takes place on the mapped location, and
the write needs to take place on the unmapped location. Currently
the write is using the mapped location, and this commit changes it
back by undoing the change to the write address that the aforementioned
commit added by mistake.

Reported-by: Miao Xie <miaox@cn.fujitsu.com>
Cc: <stable@vger.kernel.org> # 3.10+
Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-07-19 15:07:26 -04:00
..
acl.c
async-thread.c
async-thread.h
backref.c Btrfs: make backref walking code handle skinny metadata 2013-07-02 11:51:02 -04:00
backref.h Btrfs: cleanup backref search commit root flag stuff 2013-07-01 08:52:29 -04:00
btrfs_inode.h btrfs: fix minor typo in comment 2013-05-06 15:54:49 -04:00
check-integrity.c Btrfs: use a btrfs bioset instead of abusing bio internals 2013-05-17 21:52:52 -04:00
check-integrity.h
compat.h
compression.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
compression.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
ctree.c Btrfs: only do the tree_mod_log_free_eb if this is our last ref 2013-07-02 11:51:20 -04:00
ctree.h Btrfs: check if we can nocow if we don't have data space 2013-07-02 11:50:45 -04:00
delayed-inode.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-07-09 12:33:09 -07:00
delayed-inode.h [readdir] convert btrfs 2013-06-29 12:57:00 +04:00
delayed-ref.c Btrfs: separate sequence numbers for delayed ref tracking and tree mod log 2013-05-06 15:55:17 -04:00
delayed-ref.h Btrfs: handle running extent ops with skinny metadata 2013-05-17 21:40:15 -04:00
dev-replace.c Btrfs: introduce per-subvolume ordered extent list 2013-06-14 11:29:41 -04:00
dev-replace.h
dir-item.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
disk-io.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-07-09 12:33:09 -07:00
disk-io.h Btrfs: introduce grab/put functions for the root of the fs/file tree 2013-06-14 11:29:38 -04:00
export.c Btrfs: cleanup: don't check the same thing twice 2013-06-14 11:29:30 -04:00
export.h
extent_io.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-07-09 12:33:09 -07:00
extent_io.h Btrfs: check if we can nocow if we don't have data space 2013-07-02 11:50:45 -04:00
extent_map.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
extent_map.h Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
extent-tree.c Btrfs: re-add root to dead root list if we stop dropping it 2013-07-19 15:07:19 -04:00
file-item.c Btrfs: remove btrfs_sector_sum structure 2013-07-02 11:50:47 -04:00
file.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-07-09 12:33:09 -07:00
free-space-cache.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-07-09 12:33:09 -07:00
free-space-cache.h btrfs: move ifdef around sanity checks out of init_btrfs_fs 2013-06-14 11:29:18 -04:00
hash.h
inode-item.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
inode-map.c Btrfs: don't use global block reservation for inode cache truncation 2013-05-17 21:40:22 -04:00
inode-map.h
inode.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-07-09 12:33:09 -07:00
ioctl.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-07-09 12:33:09 -07:00
Kconfig btrfs: move leak debug code to functions 2013-05-06 15:55:16 -04:00
locking.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
locking.h
lzo.c btrfs: fix the code comments for LZO compression workspace 2013-07-01 08:52:26 -04:00
Makefile
math.h
ordered-data.c Btrfs: remove btrfs_sector_sum structure 2013-07-02 11:50:47 -04:00
ordered-data.h Btrfs: remove btrfs_sector_sum structure 2013-07-02 11:50:47 -04:00
orphan.c
print-tree.c Btrfs: Include the device in most error printk()s 2013-05-06 15:54:23 -04:00
print-tree.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
qgroup.c Btrfs: fix qgroup rescan resume on mount 2013-06-14 11:30:10 -04:00
raid56.c Btrfs: use a btrfs bioset instead of abusing bio internals 2013-05-17 21:52:52 -04:00
raid56.h
rcu-string.h
reada.c Btrfs: fix reada debug code compilation 2013-05-06 15:54:55 -04:00
relocation.c Btrfs: remove btrfs_sector_sum structure 2013-07-02 11:50:47 -04:00
root-tree.c Btrfs: cleanup orphaned root orphan item 2013-07-02 11:50:52 -04:00
scrub.c Btrfs: fix wrong write offset when replacing a device 2013-07-19 15:07:26 -04:00
send.c Btrfs: Cocci spatch "memdup.spatch" 2013-06-14 11:30:12 -04:00
send.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
struct-funcs.c
super.c Btrfs: stop waiting on current trans if we aborted 2013-07-01 08:52:27 -04:00
sysfs.c
transaction.c Btrfs: make the chunk allocator completely tree lockless 2013-07-02 11:50:53 -04:00
transaction.h Btrfs: make the chunk allocator completely tree lockless 2013-07-02 11:50:53 -04:00
tree-defrag.c
tree-log.c Btrfs: exclude logged extents before replying when we are mixed 2013-06-14 11:30:17 -04:00
tree-log.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
ulist.c Btrfs: fix crash regarding to ulist_add_merge 2013-07-02 11:50:59 -04:00
ulist.h Btrfs: add a rb_tree to improve performance of ulist search 2013-05-06 15:54:44 -04:00
volumes.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-07-09 12:33:09 -07:00
volumes.h Btrfs: make the chunk allocator completely tree lockless 2013-07-02 11:50:53 -04:00
xattr.c btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
xattr.h
zlib.c