Eric Sandeen bc178622d4 btrfs: use rcu_barrier() to wait for bdev puts at unmount ...

Doing this would reliably fail with -EBUSY for me:

# mount /dev/sdb2 /mnt/scratch; umount /mnt/scratch; mkfs.btrfs -f /dev/sdb2
...
unable to open /dev/sdb2: Device or resource busy

because mkfs.btrfs tries to open the device O_EXCL, and somebody still has it.

Using systemtap to track bdev gets & puts shows a kworker thread doing a
blkdev put after mkfs attempts a get; this is left over from the unmount
path:

btrfs_close_devices
	__btrfs_close_devices
		call_rcu(&device->rcu, free_device);
			free_device
				INIT_WORK(&device->rcu_work, __free_device);
				schedule_work(&device->rcu_work);

so unmount might complete before __free_device fires & does its blkdev_put.

Adding an rcu_barrier() to btrfs_close_devices() causes unmount to wait
until all blkdev_put()s are done, and the device is truly free once
unmount completes.

Cc: stable@vger.kernel.org
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

2013-03-14 14:57:29 -04:00

..

9p

The following changes since commit 4cbe5a555fa58a79b6ecbb6c531b8bab0650778d:

2012-10-12 09:59:23 +09:00

adfs

adfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

affs

affs: drop vmtruncate

2012-12-20 14:00:01 -05:00

afs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2012-10-02 20:25:04 -07:00

autofs4

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2012-12-17 15:44:47 -08:00

befs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2012-10-02 20:25:04 -07:00

bfs

bfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

btrfs

btrfs: use rcu_barrier() to wait for bdev puts at unmount

2013-03-14 14:57:29 -04:00

cachefiles

FS-Cache: Mark cancellation of in-progress operation

2012-12-20 22:34:00 +00:00

ceph

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

2012-12-20 14:00:13 -08:00

cifs

fs/cifs/cifs_dfs_ref.c: fix potential memory leakage

2013-01-22 23:58:16 -06:00

coda

fs: push rcu_barrier() from deactivate_locked_super() to filesystems

2012-10-02 21:35:55 -04:00

configfs

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

cramfs

userns: Convert cramfs to use kuid/kgid where appropriate

2012-09-21 03:13:08 -07:00

debugfs

debugfs: convert gid= argument from decimal, not octal

2013-01-11 05:56:01 -08:00

devpts

TTY: devpts, document devpts inode operations

2012-10-22 16:50:13 -07:00

dlm

dlm: check the write size from user

2013-02-04 15:31:22 -06:00

ecryptfs

fs/ecryptfs/crypto.c: make ecryptfs_encode_for_filename() static

2012-12-18 10:10:13 -06:00

efs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2012-10-02 20:25:04 -07:00

exofs

exofs: don't leak io_state and pages on read error

2012-12-14 12:17:32 +02:00

exportfs

Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux

2012-12-20 14:04:11 -08:00

ext2

ext2: fix return values on parse_options() failure

2012-10-09 23:23:53 +02:00

ext3

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

ext4

ext4: remove duplicate call to ext4_bread() in ext4_init_new_dir()

2013-01-06 23:40:25 -05:00

f2fs

f2fs: use _safe() version of list_for_each

2013-01-22 10:49:00 +09:00

fat

fat: fix incorrect function comment

2012-12-20 17:40:20 -08:00

freevxfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2012-10-02 20:25:04 -07:00

fscache

FS-Cache: Clear remaining page count on retrieval cancellation

2012-12-20 22:35:15 +00:00

fuse

fuse: remove unused variable in fuse_try_move_page()

2013-01-17 13:09:59 +01:00

gfs2

GFS2: fix skip unlock condition

2013-01-28 09:49:15 +00:00

hfs

hfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

hfsplus

Merge branch 'akpm' (Andrew's patch-bomb)

2012-12-20 20:00:43 -08:00

hostfs

Merge branch 'for-linus-37rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

2012-10-10 11:15:20 +09:00

hpfs

hpfs: drop vmtruncate

2012-12-20 18:40:00 -05:00

hppfs

pidns: Use task_active_pid_ns where appropriate

2012-11-19 05:59:09 -08:00

hugetlbfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2012-12-13 12:00:02 -08:00

isofs

tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking

2012-10-09 23:33:55 -04:00

jbd

jbd: don't wake kjournald unnecessarily

2013-01-14 22:50:45 +01:00

jbd2

Various bug fixes for ext4. Perhaps the most serious bug fixed is one

2013-01-02 09:57:34 -08:00

jffs2

jffs2: hold erase_completion_lock on exit

2012-11-18 11:59:01 +02:00

jfs

jfs: drop vmtruncate

2012-12-20 18:40:52 -05:00

lockd

lockd: Remove BUG_ON()s from fs/lockd/clntproc.c

2012-11-04 14:43:40 -05:00

logfs

logfs: drop vmtruncate

2012-12-20 18:40:53 -05:00

minix

minix: drop vmtruncate

2012-12-20 18:40:53 -05:00

ncpfs

ncpfs: drop vmtruncate

2012-12-20 18:40:54 -05:00

nfs

NFSv4.1: Handle NFS4ERR_DELAY when resetting the NFSv4.1 session

2013-01-30 17:45:15 -05:00

nfs_common

…

nfsd

Revert "nfsd: warn on odd reply state in nfsd_vfs_read"

2012-12-21 17:07:45 -08:00

nilfs2

nilfs2: fix fix very long mount time issue

2013-02-05 20:38:46 +11:00

nls

nls: fix (and rename) mac NLS table files and config options

2012-06-01 19:51:22 -07:00

notify

Merge branch 'for-next' of git://git.infradead.org/users/eparis/notify

2012-12-20 20:11:52 -08:00

ntfs

ntfs: drop vmtruncate

2012-12-20 18:40:55 -05:00

ocfs2

ocfs2: drop vmtruncate

2012-12-20 14:00:01 -05:00

omfs

omfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

openpromfs

fs: push rcu_barrier() from deactivate_locked_super() to filesystems

2012-10-02 21:35:55 -04:00

proc

mempolicy: remove arg from mpol_parse_str, mpol_to_str

2013-01-02 09:27:10 -08:00

pstore

pstore: remove __dev* attributes.

2013-01-03 15:57:14 -08:00

qnx4

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2012-10-02 20:25:04 -07:00

qnx6

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2012-10-02 20:25:04 -07:00

quota

quota: Use the pre-processor to compile out quotactl_cmd_write when !CONFIG_BLOCK

2012-12-13 16:33:24 +01:00

ramfs

don't pass nameidata to ->create()

2012-07-14 16:34:47 +04:00

reiserfs

reiserfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

romfs

fs: push rcu_barrier() from deactivate_locked_super() to filesystems

2012-10-02 21:35:55 -04:00

squashfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2012-10-02 20:25:04 -07:00

sysfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2012-12-17 15:44:47 -08:00

sysv

sysv: drop vmtruncate

2012-12-20 14:00:01 -05:00

ubifs

ubifs: use prandom_bytes

2012-12-17 17:15:26 -08:00

udf

UDF: Fix a null pointer dereference in udf_sb_free_partitions

2013-01-14 22:53:47 +01:00

ufs

ufs: drop vmtruncate

2012-12-20 14:00:01 -05:00

xfs

xfs: Fix xfs_swap_extents() after removal of xfs_flushinval_pages()

2013-01-28 16:05:10 -06:00

aio.c

aio: now fput() is OK from interrupt context; get rid of manual delayed __fput()

2012-07-22 23:57:59 +04:00

anon_inodes.c

anon_inodes: move allocation of anon_inode into ->mount()

2012-03-20 21:29:45 -04:00

attr.c

userns: Allow chown and setgid preservation

2012-11-20 04:17:24 -08:00

bad_inode.c

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

binfmt_aout.c

get rid of pt_regs argument of ->load_binary()

2012-11-28 21:53:38 -05:00

binfmt_elf_fdpic.c

get rid of pt_regs argument of ->load_binary()

2012-11-28 21:53:38 -05:00

binfmt_elf.c

binfmt_elf: fix corner case kfree of uninitialized data

2012-12-17 17:15:19 -08:00

binfmt_em86.c

exec: use -ELOOP for max recursion depth

2012-12-17 17:15:23 -08:00

binfmt_flat.c

get rid of pt_regs argument of ->load_binary()

2012-11-28 21:53:38 -05:00

binfmt_misc.c

exec: do not leave bprm->interp on stack

2012-12-20 17:40:19 -08:00

binfmt_script.c

exec: do not leave bprm->interp on stack

2012-12-20 17:40:19 -08:00

binfmt_som.c

get rid of pt_regs argument of ->load_binary()

2012-11-28 21:53:38 -05:00

bio-integrity.c

block: Ues bi_pool for bio_integrity_alloc()

2012-09-09 10:35:38 +02:00

bio.c

vfs: fix: don't increase bio_slab_max if krealloc() fails

2012-10-22 22:00:26 +02:00

block_dev.c

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

buffer.c

vfs: add missing virtual cache flush after editing partial pages

2013-01-14 13:17:50 -08:00

char_dev.c

char_dev: pin parent kobject

2012-10-22 08:50:37 +03:00

compat_binfmt_elf.c

coredump: extend core dump note section to contain file names of mapped files

2012-10-06 03:05:17 +09:00

compat_ioctl.c

Merge 3.7-rc3 into tty-next

2012-10-29 09:00:57 -07:00

compat.c

vfs: define struct filename and have getname() return it

2012-10-12 20:14:55 -04:00

coredump.c

do_coredump(): get rid of pt_regs argument

2012-11-29 00:01:25 -05:00

coredump.h

coredump: update coredump-related headers

2012-10-06 03:05:15 +09:00

dcache.c

vfs: d_obtain_alias() needs to use "/" as default name.

2012-12-20 18:49:10 -05:00

dcookies.c

fs: reduce the use of module.h wherever possible

2012-02-28 19:31:58 -05:00

direct-io.c

direct-io: don't read inode->i_blkbits multiple times

2012-11-29 12:38:44 -08:00

drop_caches.c

…

eventfd.c

fs, eventfd: add procfs fdinfo helper

2012-12-17 17:15:27 -08:00

eventpoll.c

epoll: prevent missed events on EPOLL_CTL_MOD

2013-01-02 09:16:43 -08:00

exec.c

fs/exec.c: work around icc miscompilation

2013-01-11 14:54:55 -08:00

fcntl.c

Fix F_DUPFD_CLOEXEC breakage

2012-10-09 15:52:31 +09:00

fhandle.c

Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux

2012-12-20 14:04:11 -08:00

fifo.c

fifo: Do not restart open() if it already found a partner

2012-07-16 08:33:14 -07:00

file_table.c

fs: Fix imbalance in freeze protection in mark_files_ro()

2012-12-20 13:57:36 -05:00

file.c

misc: remove __dev* attributes.

2013-01-03 15:57:16 -08:00

filesystems.c

vfs: define struct filename and have getname() return it

2012-10-12 20:14:55 -04:00

fs_struct.c

kill daemonize()

2012-11-28 21:49:02 -05:00

fs-writeback.c

writeback: fix a typo in comment

2012-12-12 17:38:34 -08:00

generic_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

inode.c

mm: redefine address_space.assoc_mapping

2012-12-11 17:22:26 -08:00

internal.h

writeback: put unused inodes to LRU after writeback completion

2012-11-26 17:41:24 -08:00

ioctl.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

ioprio.c

Merge branch 'for-3.5/core' of git://git.kernel.dk/linux-block

2012-05-30 08:52:42 -07:00

Kconfig

fuse: Move CUSE Kconfig entry from fs/Kconfig into fs/fuse/Kconfig

2013-01-17 13:08:45 +01:00

Kconfig.binfmt

coredump: make core dump functionality optional

2012-10-06 03:05:15 +09:00

libfs.c

vfs: drop vmtruncate

2012-12-20 18:46:29 -05:00

locks.c

UAPI Disintegration 2012-10-09

2012-10-09 18:35:22 -04:00

Makefile

f2fs: update Kconfig and Makefile

2012-12-11 13:43:42 +09:00

mbcache.c

…

mount.h

proc: Usable inode numbers for the namespace file descriptors.

2012-11-20 04:19:49 -08:00

mpage.c

fs: reduce the use of module.h wherever possible

2012-02-28 19:31:58 -05:00

namei.c

vfs: fix renameat to retry on ESTALE errors

2012-12-20 18:50:05 -05:00

namespace.c

vfs, freeze: use ACCESS_ONCE() to guard access to ->mnt_flags

2012-12-20 13:36:18 -05:00

no-block.c

…

open.c

vfs: make fchownat retry once on ESTALE errors

2012-12-20 18:50:07 -05:00

pipe.c

pipe(2) - race-free error recovery

2012-09-26 21:08:52 -04:00

pnode.c

VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors

2012-07-14 16:37:27 +04:00

pnode.h

vfs: Only support slave subtrees across different user namespaces

2012-11-19 05:59:20 -08:00

posix_acl.c

userns: Convert vfs posix_acl support to use kuids and kgids

2012-09-18 01:01:35 -07:00

proc_namespace.c

get rid of magic in proc_namespace.c

2012-07-14 16:32:48 +04:00

read_write.c

sendfile: allows bypassing of notifier events

2012-12-20 17:40:21 -08:00

read_write.h

compat: fs: Generic compat_sys_sendfile implementation

2012-10-02 21:35:55 -04:00

readdir.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

select.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

seq_file.c

seq_file: fix new kernel-doc warnings

2013-01-10 14:35:24 -08:00

signalfd.c

fs, epoll: add procfs fdinfo helper

2012-12-17 17:15:27 -08:00

splice.c

tcp: fix MSG_SENDPAGE_NOTLAST logic

2013-01-06 20:58:13 -08:00

stack.c

fs: reduce the use of module.h wherever possible

2012-02-28 19:31:58 -05:00

stat.c

vfs: fix readlinkat to retry on ESTALE

2012-12-20 18:50:01 -05:00

statfs.c

vfs: fix user_statfs to retry once on ESTALE errors

2012-12-20 18:50:07 -05:00

super.c

vfs: drop lock/unlock super

2012-10-09 23:33:39 -04:00

sync.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

timerfd.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

utimes.c

vfs: allow utimensat() calls to retry once on an ESTALE error

2012-12-20 18:50:08 -05:00

xattr_acl.c

userns: Fix posix_acl_file_xattr_userns gid conversion

2012-10-12 13:16:48 -07:00

xattr.c

vfs: make lremovexattr retry once on ESTALE error

2012-12-20 18:50:11 -05:00