redonkable/alistair23-linux
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alistair23-linux/fs
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Jan Kara c30dabfe5d fs: Push mnt_want_write() outside of i_mutex 
Currently, mnt_want_write() is sometimes called with i_mutex held and sometimes
without it. This isn't really a problem because mnt_want_write() is a
non-blocking operation (essentially has a trylock semantics) but when the
function starts to handle also frozen filesystems, it will get a full lock
semantics and thus proper lock ordering has to be established. So move
all mnt_want_write() calls outside of i_mutex.

One non-trivial case needing conversion is kern_path_create() /
user_path_create() which didn't include mnt_want_write() but now needs to
because it acquires i_mutex.  Because there are virtual file systems which
don't bother with freeze / remount-ro protection we actually provide both
versions of the function - one which calls mnt_want_write() and one which does
not.

[AV: scratch the previous, mnt_want_write() has been moved to kern_path_create()
by now]

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-31 01:02:49 +04:00
..
9p 9p: Push file_update_time() into v9fs_vm_page_mkwrite() 2012-07-31 01:02:46 +04:00
adfs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
affs don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
afs VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
autofs4 switch dentry_open() to struct path, make it grab references itself 2012-07-23 00:01:29 +04:00
befs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
bfs don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
btrfs btrfs: switch btrfs_ioctl_balance() to mnt_want_write_file() 2012-07-23 00:01:43 +04:00
cachefiles switch dentry_open() to struct path, make it grab references itself 2012-07-23 00:01:29 +04:00
ceph ceph: Push file_update_time() into ceph_page_mkwrite() 2012-07-31 01:02:45 +04:00
cifs VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
coda don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
configfs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
cramfs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
debugfs debugfs: get rid of useless arguments to debugfs_{mkdir,symlink} 2012-07-14 16:35:30 +04:00
devpts VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
dlm
ecryptfs ecryptfs_lookup_interpose(): allocate dentry_info first 2012-07-29 21:24:17 +04:00
efs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
exofs don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
exportfs switch dentry_open() to struct path, make it grab references itself 2012-07-23 00:01:29 +04:00
ext2 don't expose I_NEW inodes via dentry->d_inode 2012-07-23 00:00:58 +04:00
ext3 don't expose I_NEW inodes via dentry->d_inode 2012-07-23 00:00:58 +04:00
ext4 ext4: switch EXT4_IOC_RESIZE_FS to mnt_want_write_file() 2012-07-23 00:01:55 +04:00
fat don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
freevxfs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
fscache
fuse don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
gfs2 gfs2: Push file_update_time() into gfs2_page_mkwrite() 2012-07-31 01:02:46 +04:00
hfs hfs: get rid of hfs_sync_super 2012-07-22 23:58:09 +04:00
hfsplus hfsplus: get rid of write_super 2012-07-22 23:58:04 +04:00
hostfs don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
hpfs don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
hppfs switch dentry_open() to struct path, make it grab references itself 2012-07-23 00:01:29 +04:00
hugetlbfs don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
isofs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
jbd
jbd2 jbd2: use kmem_cache_zalloc wrapper instead of flag 2012-06-01 00:10:32 -04:00
jffs2 don't expose I_NEW inodes via dentry->d_inode 2012-07-23 00:00:58 +04:00
jfs don't expose I_NEW inodes via dentry->d_inode 2012-07-23 00:00:58 +04:00
lockd lockd: handle lockowner allocation failure in nlmclnt_proc() 2012-07-29 23:17:39 +04:00
logfs VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
minix don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
ncpfs don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
nfs VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
nfs_common
nfsd switch dentry_open() to struct path, make it grab references itself 2012-07-23 00:01:29 +04:00
nilfs2 VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
nls nls: fix (and rename) mac NLS table files and config options 2012-06-01 19:51:22 -07:00
notify switch dentry_open() to struct path, make it grab references itself 2012-07-23 00:01:29 +04:00
ntfs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
ocfs2 pull mnt_want_write()/mnt_drop_write() into kern_path_create()/done_path_create() resp. 2012-07-29 21:24:15 +04:00
omfs don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
openpromfs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
proc VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
pstore staging tree fixes for 3.5-rc4 2012-06-20 15:15:03 -07:00
qnx4 stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
qnx6 stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
quota quota: Split dquot_quota_sync() to writeback and cache flushing part 2012-07-22 23:58:19 +04:00
ramfs don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
reiserfs don't expose I_NEW inodes via dentry->d_inode 2012-07-23 00:00:58 +04:00
romfs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
squashfs stop passing nameidata to ->lookup() 2012-07-14 16:34:32 +04:00
sysfs sysfs: Push file_update_time() into bin_page_mkwrite() 2012-07-31 01:02:47 +04:00
sysv fs/sysv: stop using write_super and s_dirt 2012-07-22 23:58:12 +04:00
ubifs VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
udf don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
ufs fs/ufs: get rid of write_super 2012-07-22 23:58:16 +04:00
xfs switch dentry_open() to struct path, make it grab references itself 2012-07-23 00:01:29 +04:00
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
attr.c notify_change(): check that i_mutex is held 2012-07-14 16:35:42 +04:00
bad_inode.c don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
binfmt_aout.c
binfmt_elf.c
binfmt_elf_fdpic.c
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c
binfmt_script.c
binfmt_som.c
bio-integrity.c
bio.c
block_dev.c vfs: Create function for iterating over block devices 2012-07-22 23:58:45 +04:00
buffer.c fs: Push file_update_time() into __block_page_mkwrite() 2012-07-31 01:02:44 +04:00
char_dev.c
compat.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-06-01 11:53:44 -07:00
compat_binfmt_elf.c
compat_ioctl.c
dcache.c __d_unalias() should refuse to move mountpoints 2012-07-14 16:35:15 +04:00
dcookies.c
direct-io.c fs/direct-io.c: adjust suspicious bit operation 2012-07-14 16:32:46 +04:00
drop_caches.c
eventfd.c eventfd: change int to __u64 in eventfd_signal() 2012-05-31 17:49:32 -07:00
eventpoll.c HAVE_RESTORE_SIGMASK is defined on all architectures now 2012-06-01 12:58:46 -04:00
exec.c consolidate pipe file creation 2012-07-29 21:24:19 +04:00
fcntl.c
fhandle.c
fifo.c
file.c
file_table.c uninline file_free_rcu() 2012-07-29 21:24:17 +04:00
filesystems.c
fs-writeback.c vfs: Move noop_backing_dev_info check from sync into writeback 2012-07-22 23:58:18 +04:00
fs_struct.c get rid of ->mnt_longterm 2012-07-14 16:32:47 +04:00
generic_acl.c
inode.c vfs: switch i_dentry/d_alias to hlist 2012-07-14 16:32:55 +04:00
internal.h VFS: Split inode_permission() 2012-07-14 16:38:36 +04:00
ioctl.c
ioprio.c
Kconfig
Kconfig.binfmt
libfs.c VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
locks.c Remove easily user-triggerable BUG from generic_setlease 2012-07-13 10:50:23 -07:00
Makefile
mbcache.c
mount.h get rid of magic in proc_namespace.c 2012-07-14 16:32:48 +04:00
mpage.c
namei.c fs: Push mnt_want_write() outside of i_mutex 2012-07-31 01:02:49 +04:00
namespace.c VFS: Comment mount following code 2012-07-14 16:38:32 +04:00
no-block.c
open.c take grabbing f->f_path to do_dentry_open() 2012-07-29 21:24:18 +04:00
pipe.c consolidate pipe file creation 2012-07-29 21:24:19 +04:00
pnode.c VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors 2012-07-14 16:37:27 +04:00
pnode.h
posix_acl.c
proc_namespace.c get rid of magic in proc_namespace.c 2012-07-14 16:32:48 +04:00
read_write.c vfs: allow custom EOF in generic_file_llseek code 2012-07-23 00:00:15 +04:00
read_write.h
readdir.c
select.c HAVE_RESTORE_SIGMASK is defined on all architectures now 2012-06-01 12:58:46 -04:00
seq_file.c
signalfd.c
splice.c splice: fix racy pipe->buffers uses 2012-06-13 21:16:42 +02:00
stack.c
stat.c
statfs.c
super.c VFS: Pass mount flags to sget() 2012-07-14 16:38:34 +04:00
sync.c vfs: Avoid unnecessary WB_SYNC_NONE writeback during sys_sync and reorder sync passes 2012-07-22 23:59:01 +04:00
timerfd.c
utimes.c
xattr.c
xattr_acl.c