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OpenCloudOS-Kernel
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OpenCloudOS-Kernel/fs/btrfs
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Miao Xie da24927b1e Btrfs: get write access when removing a device 
Steps to reproduce:
 # mkfs.btrfs -d single -m single <disk0> <disk1>
 # mount -o ro <disk0> <mnt0>
 # mount -o ro <disk0> <mnt1>
 # mount -o remount,rw <mnt0>
 # umount <mnt0>
 # btrfs device delete <disk1> <mnt1>

We can remove a device from a R/O filesystem. The reason is that we just check
the R/O flag of the super block object. It is not enough, because the kernel
may set the R/O flag only for the mount point. We need invoke

	mnt_want_write_file()

to do a full check.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
 		2012-12-16 20:46:09 -05:00
..
Kconfig Btrfs: add config option to enable btrfs integrity check 2011-12-21 19:14:16 +01:00
Makefile Btrfs: add new sources for device replace code 2012-12-12 17:15:41 -05:00
acl.c userns: Pass a userns parameter into posix_acl_to_xattr and posix_acl_from_xattr 2012-09-18 01:01:35 -07:00
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: merge inode_list in __merge_refs 2012-12-12 17:15:27 -05:00
backref.h Btrfs: extended inode refs support for send mechanism 2012-10-25 15:45:16 -04:00
btrfs_inode.h Btrfs: fix a bug in checking whether a inode is already in log 2012-10-01 15:19:06 -04:00
check-integrity.c Btrfs: handle errors from btrfs_map_bio() everywhere 2012-12-12 17:15:40 -05:00
check-integrity.h Btrfs: add optional integrity check code 2011-12-21 19:14:09 +01:00
compat.h Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code 2009-01-06 09:38:55 -05:00
compression.c Btrfs: handle errors from btrfs_map_bio() everywhere 2012-12-12 17:15:40 -05:00
compression.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ctree.c fs/btrfs: drop if around WARN_ON 2012-12-12 17:15:24 -05:00
ctree.h Btrfs: increase BTRFS_MAX_MIRRORS by one for dev replace 2012-12-12 17:15:44 -05:00
delayed-inode.c Btrfs: cleanup for btrfs_btree_balance_dirty 2012-12-12 17:15:28 -05:00
delayed-inode.h Btrfs: flush delayed inodes if we're short on space 2012-07-23 15:41:40 -04:00
delayed-ref.c Btrfs: allow delayed refs to be merged 2012-08-28 16:53:38 -04:00
delayed-ref.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-10-01 09:06:36 -07:00
dev-replace.c Btrfs: add new sources for device replace code 2012-12-12 17:15:41 -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: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
disk-io.c Btrfs: change core code of btrfs to support the device replace operations 2012-12-12 17:15:42 -05:00
disk-io.h Btrfs: cleanup for btrfs_btree_balance_dirty 2012-12-12 17:15:28 -05:00
export.c ->encode_fh() API change 2012-05-29 23:28:33 -04:00
export.h NFS support for btrfs - v3 2008-09-25 11:04:06 -04:00
extent-tree.c Btrfs: disallow some operations on the device replace target device 2012-12-12 17:15:39 -05:00
extent_io.c Btrfs: handle errors from btrfs_map_bio() everywhere 2012-12-12 17:15:40 -05:00
extent_io.h Btrfs: pass fs_info to btrfs_map_block() instead of mapping_tree 2012-12-12 17:15:34 -05:00
extent_map.c Btrfs: do not hold the write_lock on the extent tree while logging 2012-10-04 09:39:58 -04:00
extent_map.h Btrfs: do not hold the write_lock on the extent tree while logging 2012-10-04 09:39:58 -04:00
file-item.c Btrfs: fix wrong file extent length 2012-12-12 17:15:21 -05:00
file.c Btrfs: cleanup for btrfs_btree_balance_dirty 2012-12-12 17:15:28 -05:00
free-space-cache.c Btrfs: do not warn_on io_ctl->cur in io_ctl_map_page 2012-12-16 20:46:06 -05:00
free-space-cache.h btrfs: remove all unused functions 2011-05-06 12:34:03 +02:00
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: handle errors from btrfs_map_bio() everywhere 2012-12-12 17:15:40 -05:00
ioctl.c Btrfs: get write access when removing a device 2012-12-16 20:46:09 -05:00
ioctl.h Btrfs: add support for device replace ioctls 2012-12-16 20:46:06 -05:00
locking.c Btrfs: fix a misplaced address operator in a condition 2012-08-28 16:53:23 -04:00
locking.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
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: cleanup for btrfs_wait_order_range 2012-12-12 17:15:19 -05:00
ordered-data.h Btrfs: make ordered extent be flushed by multi-task 2012-12-11 13:31:38 -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: introduce a btrfs_dev_replace_item type 2012-12-12 17:15:38 -05:00
print-tree.h
…
qgroup.c Btrfs: fix memory leak in btrfs_quota_enable() 2012-10-25 15:45:43 -04:00
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: cleanup for btrfs_btree_balance_dirty 2012-12-12 17:15:28 -05:00
root-tree.c btrfs: move transaction aborts to the point of failure 2012-10-08 20:09:02 -04:00
scrub.c Btrfs: introduce GET_READ_MIRRORS functionality for btrfs_map_block() 2012-12-12 17:15:43 -05:00
send.c Btrfs: Send: preserve ownership (uid and gid) also for symlinks. 2012-10-25 15:47:31 -04:00
send.h Btrfs: write_buf is now callable outside send.c 2012-10-04 09:39:55 -04:00
struct-funcs.c Btrfs: rewrite BTRFS_SETGET_FUNCS 2012-07-23 16:28:06 -04:00
super.c Btrfs: change core code of btrfs to support the device replace operations 2012-12-12 17:15:42 -05:00
sysfs.c btrfs: Remove unused sysfs code 2011-06-17 14:54:18 -04:00
transaction.c Btrfs: fix wrong return value of btrfs_wait_for_commit() 2012-12-16 20:46:08 -05:00
transaction.h Btrfs: improve the noflush reservation 2012-12-11 13:31:31 -05:00
tree-defrag.c btrfs: drop unused parameter from btrfs_release_path 2011-05-02 13:57:22 +02:00
tree-log.c Btrfs: fix missing log when BTRFS_INODE_NEEDS_FULL_SYNC is set 2012-12-12 17:15:22 -05:00
tree-log.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ulist.c Btrfs: make aux field of ulist 64 bit 2012-10-01 15:18:53 -04:00
ulist.h Btrfs: make aux field of ulist 64 bit 2012-10-01 15:18:53 -04:00
version.h Update Btrfs files for in-kernel usage 2008-09-25 15:41:59 -04:00
volumes.c Btrfs: allow repair code to include target disk when searching mirrors 2012-12-12 17:15:45 -05:00
volumes.h Btrfs: change core code of btrfs to support the device replace operations 2012-12-12 17:15:42 -05:00
xattr.c Btrfs: fix an while-loop of listxattr 2012-12-16 20:46:07 -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