Benjamin Marzinski 48b6bca6b7 fs: add freeze_super/thaw_super fs hooks ... Currently, freezing a filesystem involves calling freeze_super, which locks sb->s_umount and then calls the fs-specific freeze_fs hook. This makes it hard for gfs2 (and potentially other cluster filesystems) to use the vfs freezing code to do freezes on all the cluster nodes. In order to communicate that a freeze has been requested, and to make sure that only one node is trying to freeze at a time, gfs2 uses a glock (sd_freeze_gl). The problem is that there is no hook for gfs2 to acquire this lock before calling freeze_super. This means that two nodes can attempt to freeze the filesystem by both calling freeze_super, acquiring the sb->s_umount lock, and then attempting to grab the cluster glock sd_freeze_gl. Only one will succeed, and the other will be stuck in freeze_super, making it impossible to finish freezing the node. To solve this problem, this patch adds the freeze_super and thaw_super hooks. If a filesystem implements these hooks, they are called instead of the vfs freeze_super and thaw_super functions. This means that every filesystem that implements these hooks must call the vfs freeze_super and thaw_super functions itself within the hook function to make use of the vfs freezing code. Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>		2014-11-17 10:35:17 +00:00
..
9p	9p: switch to %p[dD]	2014-10-09 02:39:04 -04:00
adfs	adfs: add __printf verification, fix format/argument mismatches	2014-08-08 15:57:24 -07:00
affs	fs/affs: remove redundant sys_tz declarations	2014-10-14 02:18:22 +02:00
afs	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-13 16:23:15 +02:00
autofs4	autofs4: d_manage() should return -EISDIR when appropriate in rcu-walk mode.	2014-10-14 02:18:16 +02:00
befs	fs/befs/btree.c: remove typedef befs_btree_node	2014-10-14 02:18:20 +02:00
bfs	fs/bfs: use bfs prefix for dump_imap	2014-08-08 15:57:24 -07:00
btrfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2014-11-01 10:41:26 -07:00
cachefiles	FS-Cache fixes	2014-10-14 08:40:15 +02:00
ceph	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client	2014-10-15 06:46:01 +02:00
cifs	[CIFS] Remove obsolete comment	2014-10-17 17:17:12 -05:00
coda	fs/coda: use linux/uaccess.h	2014-08-08 15:57:20 -07:00
configfs
cramfs	fs/cramfs/inode.c: use linux/uaccess.h	2014-08-08 15:57:25 -07:00
debugfs
devpts
dlm	dlm: fix missing endian conversion of rcom_status flags	2014-10-14 15:11:48 -05:00
ecryptfs	fs: limit filesystem stacking depth	2014-10-24 00:14:39 +02:00
efivarfs
efs	fs/efs/namei.c: return is not a function	2014-08-08 15:57:18 -07:00
exofs	Boaz Harrosh - Fix broken email address	2014-10-19 20:22:32 +03:00
exportfs
ext2	percpu_counter: add @gfp to percpu_counter_init()	2014-09-08 09:51:29 +09:00
ext3	ext3: Don't check quota format when there are no quota files	2014-10-22 09:02:48 +02:00
ext4	ext4: make ext4_ext_convert_to_initialized() return proper number of blocks	2014-10-30 10:53:17 -04:00
f2fs	f2fs: support volatile operations for transient data	2014-10-07 11:54:41 -07:00
fat	fat: remove redundant sys_tz declaration	2014-10-14 02:18:20 +02:00
freevxfs
fscache	fs/fscache/object-list.c: use __seq_open_private()	2014-10-13 17:52:21 +01:00
fuse	vfs: Make d_invalidate return void	2014-10-09 02:38:57 -04:00
gfs2	GFS2: Update timestamps on fallocate	2014-11-14 14:16:33 +00:00
hfs	fs/hfs/hfs_fs.h: remove redundant sys_tz declaration	2014-10-14 02:18:20 +02:00
hfsplus
hostfs	hostfs: support rename flags	2014-08-07 14:40:09 -04:00
hpfs	fs/hpfs/dnode.c: fix suspect code indent	2014-08-08 15:57:22 -07:00
hppfs
hugetlbfs
isofs	isofs: don't bother with ->d_op for normal case	2014-10-31 06:33:17 -04:00
jbd	fs, jbd: use a more generic hash function	2014-10-22 10:02:04 +02:00
jbd2	jbd2: use a better hash function for the revoke table	2014-10-30 10:53:17 -04:00
jffs2	[jffs2] kill wbuf_queued/wbuf_dwork_lock	2014-10-09 02:39:01 -04:00
jfs	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-13 16:23:15 +02:00
kernfs	vfs: Remove unnecessary calls of check_submounts_and_drop	2014-10-09 02:38:56 -04:00
lockd	File locking related changes for v3.18 (pile #1)	2014-10-11 13:21:34 -04:00
logfs	fs/logfs/readwrite.c: kernel-doc warning fixes	2014-08-06 18:01:12 -07:00
minix	minix zmap block counts calculation fix	2014-08-08 15:57:20 -07:00
ncpfs	fs/ncpfs/dir.c: remove redundant sys_tz declaration	2014-10-14 02:18:16 +02:00
nfs	Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd	2014-10-21 12:53:45 -07:00
nfs_common	lockd: move lockd's grace period handling into its own module	2014-09-17 16:33:11 -04:00
nfsd	nfsd4: fix crash on unknown operation number	2014-10-23 13:39:51 -04:00
nilfs2	nilfs2: improve the performance of fdatasync()	2014-10-14 02:18:20 +02:00
nls
notify	fsnotify: next_i is freed during fsnotify_unmount_inodes.	2014-10-29 16:33:14 -07:00
ntfs	NTFS: Bump version to 2.1.31.	2014-10-16 12:53:35 +01:00
ocfs2	ocfs2: fix d_splice_alias() return code checking	2014-10-29 16:33:15 -07:00
omfs	FS/OMFS: block number sanity check during fill_super operation	2014-10-14 02:18:22 +02:00
openpromfs
overlayfs	ovl: initialize ->is_cursor	2014-10-31 17:47:51 -04:00
proc	mm: softdirty: enable write notifications on VMAs after VM_SOFTDIRTY cleared	2014-10-14 02:18:28 +02:00
pstore	pstore: Fix duplicate {console,ftrace}-efi entries	2014-10-15 13:51:33 -07:00
qnx4
qnx6	fs/qnx6: update debugging to current functions	2014-08-08 15:57:26 -07:00
quota	quota: Properly return errors from dquot_writeback_dquots()	2014-10-22 09:08:03 +02:00
ramfs	fs/ramfs/file-nommu.c: replace count*size kzalloc by kcalloc	2014-08-08 15:57:18 -07:00
reiserfs	fs/reiserfs/journal.c: fix sparse context imbalance warning	2014-10-14 02:18:20 +02:00
romfs	fs/romfs/super.c: add blank line after declarations	2014-08-08 15:57:25 -07:00
squashfs	fs/squashfs/super.c: logging cleanup	2014-08-06 18:01:13 -07:00
sysfs
sysv
ubifs	UBIFS: Fix trivial typo in power_cut_emulated()	2014-09-30 09:29:44 +03:00
udf	udf: Fix loading of special inodes	2014-10-09 13:06:14 +02:00
ufs	fs/ufs/balloc.c: remove unused variable	2014-10-14 02:18:20 +02:00
xfs	Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-block	2014-10-18 11:53:51 -07:00
aio.c	percpu_ref: add PERCPU_REF_INIT_* flags	2014-09-24 13:31:50 -04:00
anon_inodes.c
attr.c
bad_inode.c	bad_inode: add ->rename2()	2014-08-07 14:40:09 -04:00
binfmt_aout.c	handle suicide on late failure exits in execve() in search_binary_handler()	2014-10-09 02:39:00 -04:00
binfmt_elf.c	handle suicide on late failure exits in execve() in search_binary_handler()	2014-10-09 02:39:00 -04:00
binfmt_elf_fdpic.c	handle suicide on late failure exits in execve() in search_binary_handler()	2014-10-09 02:39:00 -04:00
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c	binfmt_misc: work around gcc-4.9 warning	2014-10-14 02:18:16 +02:00
binfmt_script.c
binfmt_som.c
block_dev.c	fs: add freeze_super/thaw_super fs hooks	2014-11-17 10:35:17 +00:00
buffer.c	fs: clarify rate limit suppressed buffer I/O errors	2014-10-21 13:55:11 -06:00
char_dev.c
compat.c	vfs: move getname() from callers to do_mount()	2014-10-09 02:39:16 -04:00
compat_binfmt_elf.c
compat_ioctl.c
coredump.c	coredump: add %i/%I in core_pattern to report the tid of the crashed thread	2014-10-14 02:18:21 +02:00
dcache.c	fix inode leaks on d_splice_alias() failure exits	2014-10-23 22:30:18 -04:00
dcookies.c
direct-io.c	fuse: honour max_read and max_write in direct_io mode	2014-09-26 21:16:51 -04:00
drop_caches.c
eventfd.c
eventpoll.c	eventpoll: fix uninitialized variable in epoll_ctl	2014-09-10 15:42:12 -07:00
exec.c	handle suicide on late failure exits in execve() in search_binary_handler()	2014-10-09 02:39:00 -04:00
fcntl.c	security: make security_file_set_fowner, f_setown and __f_setown void return	2014-09-09 16:01:36 -04:00
fhandle.c
file.c	Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-13 15:44:12 +02:00
file_table.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-10-13 11:28:42 +02:00
filesystems.c
fs-writeback.c	sched: Remove proliferation of wait_on_bit() action functions	2014-07-16 15:10:39 +02:00
fs_pin.c	make fs/{namespace,super}.c forget about acct.h	2014-08-07 14:40:09 -04:00
fs_struct.c
inode.c	mm: allow drivers to prevent new writable mappings	2014-08-08 15:57:31 -07:00
internal.h	vfs: export __inode_permission() to modules	2014-10-24 00:14:35 +02:00
ioctl.c	fs: add freeze_super/thaw_super fs hooks	2014-11-17 10:35:17 +00:00
Kconfig	overlay filesystem	2014-10-24 00:14:38 +02:00
Kconfig.binfmt
libfs.c	locks: plumb a "priv" pointer into the setlease routines	2014-10-07 14:06:12 -04:00
locks.c	locks: flock_make_lock should return a struct file_lock (or PTR_ERR)	2014-10-07 14:06:13 -04:00
Makefile	overlay filesystem	2014-10-24 00:14:38 +02:00
mbcache.c
mount.h	vfs: Add a function to lazily unmount all mounts from any dentry.	2014-10-09 02:38:55 -04:00
mpage.c	vfs: guard end of device for mpage interface	2014-10-09 22:25:53 -04:00
namei.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-11-02 10:28:43 -08:00
namespace.c	vfs: introduce clone_private_mount()	2014-10-24 00:14:36 +02:00
no-block.c
open.c	vfs: add i_op->dentry_open()	2014-10-24 00:14:35 +02:00
pipe.c
pnode.c	get rid of propagate_umount() mistakenly treating slaves as busy.	2014-08-30 18:31:41 -04:00
pnode.h
posix_acl.c
proc_namespace.c	namespaces: Use task_lock and not rcu to protect nsproxy	2014-07-29 18:08:50 -07:00
read_write.c	cachefiles_write_page(): switch to __kernel_write()	2014-10-09 02:39:05 -04:00
readdir.c
select.c
seq_file.c
signalfd.c
splice.c	vfs: export do_splice_direct() to modules	2014-10-24 00:14:35 +02:00
stack.c	fs: fix comment for 'CONFIG_LBADF'	2014-08-26 09:35:56 +02:00
stat.c
statfs.c
super.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-10-13 11:28:42 +02:00
sync.c	Export sync_filesystem() for modular ->remount_fs() use	2014-09-05 08:16:21 -07:00
timerfd.c	timerfd: Remove an always true check	2014-08-27 11:17:48 +02:00
utimes.c
xattr.c	vfs: Deduplicate code shared by xattr system calls operating on paths	2014-10-12 17:09:10 -04:00