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0e7b824c4e
linux/fs/btrfs
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Li Zefan 0e7b824c4e Btrfs: don't make a file partly checksummed through file clone 
To reproduce the bug:

  # mount /dev/sda7 /mnt
  # dd if=/dev/zero of=/mnt/src bs=4K count=1
  # umount /mnt

  # mount -o nodatasum /dev/sda7 /mnt
  # dd if=/dev/zero of=/mnt/dst bs=4K count=1
  # clone_range -s 4K -l 4K /mnt/src /mnt/dst

  # echo 3 > /proc/sys/vm/drop_caches
  # cat /mnt/dst
  # dmesg
  ...
  btrfs no csum found for inode 258 start 0
  btrfs csum failed ino 258 off 0 csum 2566472073 private 0

It's because part of the file is checksummed and the other part is not,
and then btrfs will complain checksum is not found when we read the file.

Disallow file clone if src and dst file have different checksum flag,
so we ensure a file is completely checksummed or unchecksummed.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-09-18 10:20:46 -04:00
..
acl.c Btrfs: make acl functions really no-op if acl is not enabled 2011-08-01 14:30:48 -04:00
async-thread.c Btrfs: don't walk around with task->state != TASK_RUNNING 2010-05-25 10:34:58 -04:00
async-thread.h Btrfs: fix deadlock on async thread startup 2009-10-05 09:44:45 -04:00
btrfs_inode.h Btrfs: fix an oops when deleting snapshots 2011-09-11 10:52:24 -04:00
compat.h
compression.c Btrfs: check the nodatasum flag when writing compressed files 2011-08-01 14:30:46 -04:00
compression.h btrfs: rename variables clashing with global function names 2011-05-02 13:57:19 +02:00
ctree.c Btrfs: remove lockdep magic from btrfs_next_leaf 2011-07-27 12:46:47 -04:00
ctree.h Btrfs: use plain page_address() in header fields setget functions 2011-08-16 21:09:15 -04:00
delayed-inode.c Btrfs: switch the btrfs tree locks to reader/writer 2011-07-27 12:46:46 -04:00
delayed-inode.h btrfs: fix inconsonant inode information 2011-06-27 11:34:27 -04:00
delayed-ref.c btrfs: remove old unused commented out code 2011-05-06 12:34:10 +02:00
delayed-ref.h btrfs: remove all unused functions 2011-05-06 12:34:03 +02:00
dir-item.c Btrfs: remove redundant code for dir item lookup 2011-08-01 14:30:48 -04:00
disk-io.c Btrfs: make a lockdep class for each root 2011-07-27 12:46:46 -04:00
disk-io.h Btrfs: make a lockdep class for each root 2011-07-27 12:46:46 -04:00
export.c Merge branch 'ino-alloc' of git://repo.or.cz/linux-btrfs-devel into inode_numbers 2011-05-21 09:27:38 -04:00
export.h
extent_io.c Btrfs: don't call writepages from within write_full_page 2011-08-01 14:37:36 -04:00
extent_io.h Btrfs: remove unused members from struct extent_state 2011-08-01 14:30:50 -04:00
extent_map.c Btrfs: clean up code for merging extent maps 2011-08-01 14:30:50 -04:00
extent_map.h btrfs: drop gfp parameter from alloc_extent_map 2011-05-02 13:57:21 +02:00
extent-tree.c Btrfs: forced readonly when btrfs_drop_snapshot() fails 2011-08-16 21:09:15 -04:00
file-item.c Btrfs: skip locking if searching the commit root in csum lookup 2011-09-11 10:52:24 -04:00
file.c Btrfs: fix the file extent gap when doing direct IO 2011-09-11 10:52:24 -04:00
free-space-cache.c Btrfs: reset to appropriate block rsv after orphan operations 2011-09-11 10:52:24 -04:00
free-space-cache.h btrfs: remove all unused functions 2011-05-06 12:34:03 +02:00
hash.h Btrfs: remove crc32c.h and use libcrc32c directly. 2009-06-10 11:29:53 -04:00
inode-item.c Btrfs: BUG_ON is deleted from the caller of btrfs_truncate_item & btrfs_extend_item 2011-05-23 13:24:39 -04:00
inode-map.c btrfs: add helper for fs_info->closing 2011-06-04 08:11:22 -04:00
inode-map.h Btrfs: Support reading/writing on disk free ino cache 2011-04-25 16:46:11 +08:00
inode.c btrfs: fix d_off in the first dirent 2011-09-18 10:20:46 -04:00
ioctl.c Btrfs: don't make a file partly checksummed through file clone 2011-09-18 10:20:46 -04:00
ioctl.h Btrfs: add mount -o auto_defrag 2011-05-26 17:52:15 -04:00
Kconfig btrfs: Add lzo compression support 2010-12-22 23:15:47 +08:00
locking.c Btrfs: switch the btrfs tree locks to reader/writer 2011-07-27 12:46:46 -04:00
locking.h Btrfs: switch the btrfs tree locks to reader/writer 2011-07-27 12:46:46 -04:00
lzo.c Btrfs: Avoid accessing unmapped kernel address 2011-02-16 15:37:58 -05:00
Makefile Btrfs: make acl functions really no-op if acl is not enabled 2011-08-01 14:30:48 -04:00
ordered-data.c Btrfs: add initial tracepoint support for btrfs 2011-03-28 05:37:33 -04:00
ordered-data.h btrfs: Allow to add new compression algorithm 2010-12-22 23:15:45 +08:00
orphan.c Btrfs: fixup return code for btrfs_del_orphan_item 2010-12-09 13:57:15 -05:00
print-tree.c btrfs: fix missing break in switch phrase 2011-01-28 16:40:37 -05:00
print-tree.h
relocation.c Merge branch 'integration' into for-linus 2011-07-27 16:18:13 -04:00
root-tree.c btrfs: make btrfs_set_root_node void 2011-08-01 14:30:44 -04:00
scrub.c btrfs: remove unneeded includes from scrub.c 2011-06-10 14:59:52 +02:00
struct-funcs.c Btrfs: stop using highmem for extent_buffers 2011-07-27 12:46:45 -04:00
super.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable 2011-07-08 23:25:45 -07:00
sysfs.c btrfs: Remove unused sysfs code 2011-06-17 14:54:18 -04:00
transaction.c Btrfs: fix misuse of trans block rsv 2011-09-11 10:52:24 -04:00
transaction.h Merge branch 'for-chris' of 2011-05-28 07:00:39 -04:00
tree-defrag.c btrfs: drop unused parameter from btrfs_release_path 2011-05-02 13:57:22 +02:00
tree-log.c Btrfs: fix an oops of log replay 2011-08-16 21:09:15 -04:00
tree-log.h btrfs: remove unused function prototypes 2011-05-04 14:01:26 +02:00
version.h
volumes.c Btrfs: fix uninitialized sync_pending 2011-08-16 21:09:31 -04:00
volumes.h Btrfs: detect wether a device supports discard 2011-08-16 21:09:15 -04:00
xattr.c btrfs: xattr: fix attribute removal 2011-09-11 10:52:25 -04:00
xattr.h fs/vfs/security: pass last path component to LSM on inode creation 2011-02-01 11:12:29 -05:00
zlib.c zlib: slim down zlib_deflate() workspace when possible 2011-03-22 17:44:17 -07:00