Nick Piggin d208bbdda9 fs: improve remount,ro vs buffercache coherency ... Invalidate sb->s_bdev on remount,ro. Fixes a problem reported by Jorge Boncompte who is seeing corruption trying to snapshot a minix filesystem image. Some filesystems modify their metadata via a path other than the bdev buffer cache (eg. they may use a private linear mapping for their metadata, or implement directories in pagecache, etc). Also, file data modifications usually go to the bdev via their own mappings. These updates are not coherent with buffercache IO (eg. via /dev/bdev) and never have been. However there could be a reasonable expectation that after a mount -oremount,ro operation then the buffercache should subsequently be coherent with previous filesystem modifications. So invalidate the bdev mappings on a remount,ro operation to provide a coherency point. The problem was exposed when we switched the old rd to brd because old rd didn't really function like a normal block device and updates to rd via mappings other than the buffercache would still end up going into its buffercache. But the same problem has always affected other "normal" block devices, including loop. [akpm@linux-foundation.org: repair comment layout] Reported-by: "Jorge Boncompte [DTI2]" <jorge@dti2.net> Tested-by: "Jorge Boncompte [DTI2]" <jorge@dti2.net> Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>		2010-03-03 13:00:20 -05:00
..
9p	9p: fix memory leak in v9fs_parse_options()	2010-02-08 17:59:34 -06:00
adfs	adfs: remove redundant test on unsigned	2009-09-24 07:21:05 -07:00
affs	fix affs parse_options()	2010-01-26 22:22:25 -05:00
afs	afs: remove manual O_SYNC handling	2009-12-10 15:02:50 +01:00
autofs	…
autofs4	Revert "autofs4: always use lookup for lookup"	2010-03-03 12:58:31 -05:00
befs	befs: fix leak	2010-02-07 03:06:21 -05:00
bfs	Fix failure exits in bfs_fill_super()	2010-01-26 22:22:25 -05:00
btrfs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable	2010-02-15 19:56:21 -08:00
cachefiles	CacheFiles: Fix a race in cachefiles_delete_object() vs rename	2010-02-20 10:06:35 -05:00
cifs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6	2010-02-10 07:16:44 -08:00
coda	sysctl: Drop & in front of every proc_handler.	2009-11-18 08:37:40 -08:00
configfs	Fix configfs leak	2010-01-14 09:05:42 -05:00
cramfs	…
debugfs	get rid of pointless checks after simple_pin_fs()	2010-01-26 22:22:26 -05:00
devpts	devpts_get_tty() should validate inode	2009-12-11 15:18:05 -08:00
dlm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm	2009-12-10 09:33:59 -08:00
ecryptfs	ecryptfs: use after free	2010-01-19 22:36:06 -06:00
efs	…
exofs	exofs: simple_write_end does not mark_inode_dirty	2010-01-05 09:14:32 +02:00
exportfs	nfs: new subdir Documentation/filesystems/nfs	2009-10-27 19:34:04 -04:00
ext2	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-12-16 12:04:02 -08:00
ext3	ext3: Replace lock/unlock_super() with an explicit lock for resizing	2009-12-23 13:44:12 +01:00
ext4	ext4: Fix quota accounting error with fallocate	2010-01-25 04:00:31 -05:00
fat	Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6	2009-12-16 10:29:26 -08:00
freevxfs	…
fscache	FS-Cache: Avoid maybe-used-uninitialised warning on variable	2009-12-16 07:20:13 -08:00
fuse	mm: flush dcache before writing into page to avoid alias	2010-02-02 18:11:21 -08:00
gfs2	GFS2: Fix bmap allocation corner-case bug	2010-02-12 10:16:14 +00:00
hfs	hfs: fix a potential buffer overflow	2009-12-15 08:53:10 -08:00
hfsplus	hfsplus: refuse to mount volumes larger than 2TB	2009-10-29 07:39:27 -07:00
hostfs	…
hpfs	hpfs: use bitmap_weight()	2009-12-16 07:20:06 -08:00
hppfs	hppfs: handle ->put_link()	2010-01-14 09:05:25 -05:00
hugetlbfs	Untangling ima mess, part 1: alloc_file()	2009-12-16 12:16:47 -05:00
isofs	Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linux	2009-12-16 10:43:34 -08:00
jbd	jbd: jbd-debug and jbd2-debug should be writable	2009-12-23 13:44:13 +01:00
jbd2	jbd2: don't use __GFP_NOFAIL in journal_init_common()	2009-12-23 08:05:15 -05:00
jffs2	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-12-16 12:04:02 -08:00
jfs	jfs: Fix 32bit build warning	2009-12-22 12:27:35 -05:00
lockd	Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linux	2009-12-16 10:43:34 -08:00
minix	V3 minixfs: add missing directory type checking	2009-09-23 07:39:57 -07:00
ncpfs	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
nfs	NFS: Too many GETATTR and ACCESS calls after direct I/O	2010-02-15 19:53:43 -08:00
nfs_common	…
nfsd	vfs: don't call ima_file_check() unconditionally in nfsd_open()	2010-02-20 00:47:31 -05:00
nilfs2	nilfs2: fix potential leak of dirty data on umount	2010-01-31 14:57:31 +09:00
nls	Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6	2009-09-30 09:31:14 -07:00
notify	inotify: only warn once for inotify problems	2010-01-15 14:49:23 -08:00
ntfs	kill I_LOCK	2009-12-17 11:03:25 -05:00
ocfs2	ocfs2/cluster: Make o2net connect messages KERN_NOTICE	2010-02-08 13:02:28 -08:00
omfs	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
openpromfs	…
partitions	partitions: read whole sector with EFI GPT header	2009-11-23 09:29:58 +01:00
proc	some clean up in fs/proc	2010-03-03 13:00:18 -05:00
qnx4	qnx4: use hweight8	2009-12-16 07:20:18 -08:00
quota	quota: Fix dquot_transfer for filesystems different from ext4	2010-01-11 13:06:41 +01:00
ramfs	nommu: fix shared mmap after truncate shrinkage problems	2010-01-16 12:15:40 -08:00
reiserfs	reiserfs: Fix softlockup while waiting on an inode	2010-02-14 19:07:56 +01:00
romfs	fix leak in romfs_fill_super()	2010-01-26 22:22:26 -05:00
smbfs	fs: Make unload_nls() NULL pointer safe	2009-09-24 07:47:42 -04:00
squashfs	const: mark remaining super_operations const	2009-09-22 07:17:24 -07:00
sysfs	sysfs: sysfs_sd_setattr set iattrs unconditionally	2010-02-16 15:42:42 -08:00
sysv	…
ubifs	lib: Introduce generic list_sort function	2010-01-12 21:02:00 -08:00
udf	udf: Avoid IO in udf_clear_inode	2009-12-14 21:40:04 +01:00
ufs	ufs: NFS support	2009-12-16 07:20:06 -08:00
xfs	xfs: xfs_swap_extents needs to handle dynamic fork offsets	2010-01-15 13:49:07 -06:00
Kconfig	Revert "task_struct: make journal_info conditional"	2009-12-17 13:23:24 -08:00
Kconfig.binfmt	…
Makefile	…
aio.c	aio: remove unused field	2009-12-16 07:20:13 -08:00
anon_inodes.c	Sanitize f_flags helpers	2009-12-22 12:27:34 -05:00
attr.c	truncate: new helpers	2009-09-24 08:41:47 -04:00
bad_inode.c	…
binfmt_aout.c	Split 'flush_old_exec' into two functions	2010-01-29 08:22:01 -08:00
binfmt_elf.c	Split 'flush_old_exec' into two functions	2010-01-29 08:22:01 -08:00
binfmt_elf_fdpic.c	Split 'flush_old_exec' into two functions	2010-01-29 08:22:01 -08:00
binfmt_em86.c	…
binfmt_flat.c	Split 'flush_old_exec' into two functions	2010-01-29 08:22:01 -08:00
binfmt_misc.c	…
binfmt_script.c	…
binfmt_som.c	Split 'flush_old_exec' into two functions	2010-01-29 08:22:01 -08:00
bio-integrity.c	block: fix bugs in bio-integrity mempool usage	2010-01-30 20:28:19 +01:00
bio.c	block: fix bio_add_page for non trivial merge_bvec_fn case	2010-01-28 15:08:29 +01:00
block_dev.c	freeze_bdev: don't deactivate successfully frozen MS_RDONLY sb	2010-02-07 03:06:21 -05:00
buffer.c	Merge branch 'writeback' of git://git.kernel.dk/linux-2.6-block	2009-09-25 09:27:30 -07:00
char_dev.c	fs/char_dev.c: remove useless loop	2009-09-24 07:21:03 -07:00
compat.c	compat.c: Remove dependence on nfsd private headers	2009-12-14 18:12:10 -05:00
compat_binfmt_elf.c	…
compat_ioctl.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6	2010-02-11 14:05:55 -08:00
dcache.c	fs/dcache.c: CodingStyle cleanup	2010-03-03 13:00:19 -05:00
dcookies.c	…
direct-io.c	dio: fix use-after-free	2009-12-17 04:52:13 -05:00
drop_caches.c	sysctl: remove "struct file *" argument of ->proc_handler	2009-09-24 07:21:04 -07:00
eventfd.c	eventfd - allow atomic read and waitqueue remove	2010-01-25 12:26:38 -02:00
eventpoll.c	anonfd: Allow making anon files read-only	2009-12-22 12:27:34 -05:00
exec.c	fs/exec.c: fix initial stack reservation	2010-02-22 19:50:34 -08:00
fcntl.c	Fix race in tty_fasync() properly	2010-02-07 10:26:01 -08:00
fifo.c	…
file.c	headers: remove sched.h from interrupt.h	2009-10-11 11:20:58 -07:00
file_table.c	Take ima_file_free() to proper place.	2010-02-07 03:07:29 -05:00
filesystems.c	…
fs-writeback.c	writeback: add missing kernel-doc notation	2010-01-02 10:09:44 -08:00
fs_struct.c	…
generic_acl.c	make generic_acl slightly more generic	2009-12-16 12:16:49 -05:00
inode.c	kill I_LOCK	2009-12-17 11:03:25 -05:00
internal.h	Fix f_flags/f_mode in case of lookup_instantiate_filp() from open(pathname, 3)	2009-12-22 12:27:34 -05:00
ioctl.c	__generic_block_fiemap(): fix for files bigger than 4GB	2009-11-12 07:26:01 -08:00
ioprio.c	…
libfs.c	libfs: Unexport and kill simple_prepare_write	2010-03-03 13:00:17 -05:00
locks.c	const: make lock_manager_operations const	2009-09-22 07:17:25 -07:00
mbcache.c	…
mpage.c	…
namei.c	fix LOOKUP_FOLLOW on automount "symlinks"	2010-02-19 03:56:42 -05:00
namespace.c	do_add_mount() should sanitize mnt_flags	2010-01-16 13:07:36 -05:00
nfsctl.c	vfs: nfsctl.c un-used nfsd #includes	2009-12-14 18:12:11 -05:00
no-block.c	…
open.c	Sanitize f_flags helpers	2009-12-22 12:27:34 -05:00
pipe.c	fs: no games with DCACHE_UNHASHED	2009-12-17 10:51:40 -05:00
pnode.c	…
pnode.h	…
posix_acl.c	…
read_write.c	sendfile(): check f_op.splice_write() rather than f_op.sendpage()	2009-11-04 09:09:52 +01:00
read_write.h	…
readdir.c	…
select.c	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
seq_file.c	vfs: seq_file: add helpers for data filling	2009-09-24 07:47:35 -04:00
signalfd.c	anonfd: Allow making anon files read-only	2009-12-22 12:27:34 -05:00
splice.c	sendfile(): check f_op.splice_write() rather than f_op.sendpage()	2009-11-04 09:09:52 +01:00
stack.c	VFS/fsstack: handle 32-bit smp + preempt + large files in fsstack_copy_inode_size	2009-12-17 10:58:17 -05:00
stat.c	Add unlocked version of inode_add_bytes() function	2009-12-23 13:33:54 +01:00
super.c	fs: improve remount,ro vs buffercache coherency	2010-03-03 13:00:20 -05:00
sync.c	fold do_sync_file_range into sys_sync_file_range	2009-12-17 11:03:25 -05:00
timerfd.c	anonfd: Allow making anon files read-only	2009-12-22 12:27:34 -05:00
utimes.c	…
xattr.c	sanitize xattr handler prototypes	2009-12-16 12:16:49 -05:00
xattr_acl.c	VFS: Use GFP_NOFS in posix_acl_from_xattr()	2009-12-03 11:48:07 +00:00