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linux-sg2042/fs/btrfs
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Josef Bacik 09a2a8f96e Btrfs: fix bad extent logging 
A user sent me a btrfs-image of a file system that was panicing on mount during
the log recovery.  I had originally thought these problems were from a bug in
the free space cache code, but that was just a symptom of the problem.  The
problem is if your application does something like this

[prealloc][prealloc][prealloc]

the internal extent maps will merge those all together into one extent map, even
though on disk they are 3 separate extents.  So if you go to write into one of
these ranges the extent map will be right since we use the physical extent when
doing the write, but when we log the extents they will use the wrong sizes for
the remainder prealloc space.  If this doesn't happen to trip up the free space
cache (which it won't in a lot of cases) then you will get bogus entries in your
extent tree which will screw stuff up later.  The data and such will still work,
but everything else is broken.  This patch fixes this by not allowing extents
that are on the modified list to be merged.  This has the side effect that we
are no longer adding everything to the modified list all the time, which means
we now have to call btrfs_drop_extents every time we log an extent into the
tree.  So this allows me to drop all this speciality code I was using to get
around calling btrfs_drop_extents.  With this patch the testcase I've created no
longer creates a bogus file system after replaying the log.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
 		2013-05-06 15:54:34 -04:00
..
Kconfig btrfs: update kconfig title 2013-05-06 15:54:22 -04:00
Makefile Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -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 btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
backref.c Btrfs: fix double free in the iterate_extent_inodes() 2013-05-06 15:54:31 -04:00
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 Btrfs: add optional integrity check code 2011-12-21 19:14:09 +01:00
compat.h
…
compression.c Btrfs: cleanup unused arguments of btrfs_csum_data 2013-05-06 15:54:14 -04:00
compression.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ctree.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
ctree.h Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
delayed-inode.c Btrfs: improve the delayed inode throttling 2013-03-07 07:52:40 -05:00
delayed-inode.h Btrfs: improve the delayed inode throttling 2013-03-07 07:52:40 -05:00
delayed-ref.c Btrfs: compare relevant parts of delayed tree refs 2013-05-06 15:54:29 -04:00
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 bad extent logging 2013-05-06 15:54:34 -04:00
disk-io.h Btrfs: cleanup unused arguments of btrfs_csum_data 2013-05-06 15:54:14 -04:00
export.c fs: encode_fh: return FILEID_INVALID if invalid fid_type 2013-02-26 02:46:10 -05:00
export.h
…
extent-tree.c Btrfs: don't wait on ordered extents if we have a trans open 2013-05-06 15:54:32 -04:00
extent_io.c Btrfs: pass NULL instead of 0 2013-05-06 15:54:27 -04:00
extent_io.h Btrfs: fix race between mmap writes and compression 2013-03-26 13:19:14 -04:00
extent_map.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
extent_map.h Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
file-item.c btrfs: Cleanup some redundant codes in btrfs_lookup_csums_range() 2013-05-06 15:54:20 -04:00
file.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
free-space-cache.c Btrfs: Include the device in most error printk()s 2013-05-06 15:54:23 -04:00
free-space-cache.h Btrfs: add some free space cache tests 2013-05-06 15:52:54 -04:00
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 Btrfs: Support reading/writing on disk free ino cache 2011-04-25 16:46:11 +08:00
inode.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
ioctl.c btrfs: make subvol creation/deletion killable in the early stages 2013-05-06 15:54:26 -04:00
locking.c Btrfs: save us a read_lock 2013-02-20 09:37:17 -05:00
locking.h Btrfs: remove btrfs_try_spin_lock 2013-03-14 14:57:10 -04:00
lzo.c btrfs: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:21 +08:00
math.h Btrfs: cleanup duplicated division functions 2012-12-11 13:31:30 -05:00
ordered-data.c Btrfs: hold the ordered operations mutex when waiting on ordered extents 2013-03-28 09:51:28 -04:00
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 btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
print-tree.c Btrfs: Include the device in most error printk()s 2013-05-06 15:54:23 -04:00
print-tree.h
…
qgroup.c Btrfs: fix a warning when disabling quota 2013-05-06 15:54:28 -04:00
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: fix bad extent logging 2013-05-06 15:54:34 -04:00
root-tree.c Btrfs: rename root_times_lock to root_item_lock 2012-12-16 20:46:21 -05:00
scrub.c Btrfs: add a incompatible format change for smaller metadata extent refs 2013-05-06 15:54:18 -04:00
send.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2013-03-29 11:13:25 -07:00
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 infinite loop when we abort on mount 2013-05-06 15:54:29 -04:00
sysfs.c btrfs: fixup/remove module.h usage as required 2013-03-01 15:01:01 -05:00
transaction.c Btrfs: fix infinite loop when we abort on mount 2013-05-06 15:54:29 -04:00
transaction.h btrfs: clean snapshots one by one 2013-05-06 15:54:21 -04:00
tree-defrag.c btrfs: remove cache only arguments from defrag path 2013-02-20 12:59:36 -05:00
tree-log.c Btrfs: fix bad extent logging 2013-05-06 15:54:34 -04:00
tree-log.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
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: fix bad extent logging 2013-05-06 15:54:34 -04:00
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 fs/vfs/security: pass last path component to LSM on inode creation 2011-02-01 11:12:29 -05:00
zlib.c btrfs: fix message printing 2012-10-09 09:19:57 -04:00