Christoph Hellwig aa72a5cf00 xfs: simplify xfs_trans_iget ... xfs_trans_iget is a wrapper for xfs_iget that adds the inode to the transaction after it is read. Except when the inode already is in the inode cache, in which case it returns the existing locked inode with increment lock recursion counts. Now, no one in the tree every decrements these lock recursion counts, so any user of this gets a potential double unlock when both the original owner of the inode and the xfs_trans_iget caller unlock it. When looking back in a git bisect in the historic XFS tree there was only one place that decremented these counts, xfs_trans_iput. Introduced in commit ca25df7a840f426eb566d52667b6950b92bb84b5 by Adam Sweeney in 1993, and removed in commit 19f899a3ab155ff6a49c0c79b06f2f61059afaf3 by Steve Lord in 2003. And as long as it didn't slip through git bisects cracks never actually used in that time frame. A quick audit of the callers of xfs_trans_iget shows that no caller really relies on this behaviour fortunately - xfs_ialloc allows this inode from disk so it must not be there before, and all the RT allocator routines only every add each RT bitmap inode once. In addition to removing lots of code and reducing the size of the inode item this patch also avoids the double inode cache lookup in each create/mkdir/mknod transaction. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com> Signed-off-by: Felix Blyakher <felixb@sgi.com>		2009-09-01 12:46:16 -05:00
..
9p	9p: Fix incorrect parameters to v9fs_file_readn.	2009-07-14 15:54:42 -05:00
adfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
affs	affs: add ->sync_fs	2009-06-11 21:36:14 -04:00
afs	AFS: Fix compilation warning	2009-07-12 12:24:07 -07:00
autofs	switch follow_down()	2009-06-11 21:36:01 -04:00
autofs4	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
befs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-06-17 08:46:57 -07:00
bfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
btrfs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable	2009-08-07 19:03:09 -07:00
cachefiles	enforce ->sync_fs is only called for rw superblock	2009-06-11 21:36:06 -04:00
cifs	[CIFS] Update readme to reflect forceuid mount parms	2009-08-04 03:53:28 +00:00
coda	splice: implement default splice_read method	2009-05-11 14:13:10 +02:00
configfs	configfs: Rework configfs_depend_item() locking and make lockdep happy	2009-04-30 10:48:26 -07:00
cramfs	fs/cramfs: return f_fsid for statfs(2)	2009-04-02 19:05:08 -07:00
debugfs	debugfs: use specified mode to possibly mark files read/write only	2009-06-15 21:30:28 -07:00
devpts	devpts: remove module-related code	2009-06-24 08:15:24 -04:00
dlm	dlm: free socket in error exit path	2009-07-14 12:28:43 -05:00
ecryptfs	eCryptfs: parse_tag_3_packet check tag 3 packet encrypted key size	2009-07-28 14:26:06 -07:00
efs	get rid of BKL in fs/efs	2009-06-17 00:36:36 -04:00
exofs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
exportfs
ext2	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
ext3	ext3: Get rid of extenddisksize parameter of ext3_get_blocks_handle()	2009-07-15 21:30:46 +02:00
ext4	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4	2009-07-13 16:39:25 -07:00
fat	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
freevxfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
fscache	FS-Cache: Fixup renamed filenames in comments in internal.h	2009-05-27 10:20:13 -07:00
fuse	Revert "fuse: Fix build error" as unnecessary	2009-07-11 11:22:34 -07:00
gfs2	GFS2: Fix permissions on "recover" file	2009-08-14 14:04:46 +01:00
hfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
hfsplus	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
hostfs	hostfs: set maximum filesize in superblock for proper LFS support	2009-06-30 18:56:03 -07:00
hpfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
hppfs	hppfs: hppfs_read_file() may return -ERROR	2009-04-02 19:04:53 -07:00
hugetlbfs	Merge branch 'master' into next	2009-05-22 18:40:59 +10:00
isofs	isofs: fix Joliet regression	2009-07-10 19:18:59 -07:00
jbd	jbd: fix race between write_metadata_buffer and get_write_access	2009-07-21 11:54:42 +02:00
jbd2	jbd2: fix race between write_metadata_buffer and get_write_access	2009-07-13 17:55:35 -04:00
jffs2	jffs2: Fix return value from jffs2_do_readpage_nolock()	2009-08-04 12:13:06 +01:00
jfs	jfs: Fix early release of acl in jfs_get_acl	2009-07-23 11:08:36 -05:00
lockd	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
minix	Making fs/minix/minix.h double including safe	2009-06-22 11:34:42 -07:00
ncpfs	NLS: update handling of Unicode	2009-06-15 21:44:43 -07:00
nfs	NFS: Fix an O_DIRECT Oops...	2009-08-12 08:21:39 -07:00
nfs_common
nfsd	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
nilfs2	nilfs2: fix missing unlock in error path of nilfs_mdt_write_page	2009-08-02 22:24:15 +09:00
nls	NLS: update handling of Unicode	2009-06-15 21:44:43 -07:00
notify	inotify: use GFP_NOFS under potential memory pressure	2009-07-21 15:26:27 -04:00
ntfs	ntfs: use is_power_of_2() function for clarity.	2009-06-16 19:47:48 -07:00
ocfs2	Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2	2009-08-13 11:17:40 -07:00
omfs	switch omfs to simple_fsync()	2009-06-11 21:36:13 -04:00
openpromfs
partitions	partitions: fix broken uevent_suppress conversion	2009-07-12 13:02:09 -07:00
proc	mm_for_maps: take ->cred_guard_mutex to fix the race with exec	2009-08-10 20:49:26 +10:00
qnx4	fs/qnx4: sanitize includes	2009-06-11 21:36:12 -04:00
quota	quota: Silence lockdep on quota_on	2009-07-30 17:31:23 +02:00
ramfs	fs/ramfs/file-nommu.c needs include/linux/sched.h	2009-07-29 19:10:36 -07:00
reiserfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
romfs	ROMFS: romfs_dev_read() error ignored	2009-05-09 10:49:41 -04:00
smbfs	push BKL down into ->put_super	2009-06-11 21:36:07 -04:00
squashfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
sysfs	sysfs: fix hardlink count on device_move	2009-07-28 13:45:21 -07:00
sysv	get rid of BKL in fs/sysv	2009-06-17 00:36:37 -04:00
ubifs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
udf	udf: Fix loading of VAT inode when drive wrongly reports number of recorded blocks	2009-07-30 17:28:26 +02:00
ufs	ufs: sector_t cannot be negative	2009-06-18 13:03:46 -07:00
xfs	xfs: simplify xfs_trans_iget	2009-09-01 12:46:16 -05:00
aio.c	eventfd: revised interface and cleanups	2009-06-30 18:55:58 -07:00
anon_inodes.c	fs: Provide empty .set_page_dirty() aop for anon inodes	2009-06-18 14:46:10 +02:00
attr.c	vfs: Use lowercase names of quota functions	2009-03-26 02:18:35 +01:00
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c	elf_core_dump: use rcu_read_lock() to access ->real_parent	2009-06-18 13:03:52 -07:00
binfmt_elf.c	elf: fix one check-after-use	2009-07-01 11:14:28 -07:00
binfmt_em86.c
binfmt_flat.c	flat: fix uninitialized ptr with shared libs	2009-08-07 10:39:57 -07:00
binfmt_misc.c
binfmt_script.c
binfmt_som.c	Don't crap into descriptor table in binfmt_som	2009-03-31 23:00:28 -04:00
bio-integrity.c	block: Create bip slabs with embedded integrity vectors	2009-07-01 10:56:25 +02:00
bio.c	block: fix sg SG_DXFER_TO_FROM_DEV regression	2009-07-10 20:31:53 +02:00
block_dev.c	PM / Hibernate: Replace bdget call with simple atomic_inc of i_count	2009-07-29 21:07:55 +02:00
buffer.c	Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block	2009-06-11 11:10:35 -07:00
char_dev.c	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
compat_binfmt_elf.c
compat_ioctl.c	compat_ioctl: hook up compat handler for FIEMAP ioctl	2009-08-07 10:39:56 -07:00
compat.c	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
dcache.c	dcache: extrace and use d_unlinked()	2009-06-11 21:36:06 -04:00
dcookies.c
direct-io.c	block: Do away with the notion of hardsect_size	2009-05-22 23:22:54 +02:00
drop_caches.c	mm: remove __invalidate_mapping_pages variant	2009-06-16 19:47:43 -07:00
eventfd.c	eventfd: revised interface and cleanups	2009-06-30 18:55:58 -07:00
eventpoll.c	epoll: fix nested calls support	2009-06-18 13:03:41 -07:00
exec.c	cred_guard_mutex: do not return -EINTR to user-space	2009-07-06 13:57:04 -07:00
fcntl.c	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
fifo.c
file_table.c	fs: move mark_files_ro into file_table.c	2009-06-11 21:36:02 -04:00
file.c
filesystems.c	fs: Mark get_filesystem_list() as __init function.	2009-04-20 23:02:52 -04:00
fs_struct.c	Get rid of indirect include of fs_struct.h	2009-03-31 23:00:27 -04:00
fs-writeback.c	cleanup __writeback_single_inode	2009-06-24 08:15:26 -04:00
generic_acl.c	New helper - current_umask()	2009-03-31 23:00:26 -04:00
inode.c	vfs: add __destroy_inode	2009-08-07 14:38:29 -03:00
internal.h	Trim a bit of crap from fs.h	2009-06-11 21:36:07 -04:00
ioctl.c	fs: Add new pre-allocation ioctls to vfs for compatibility with legacy xfs ioctls	2009-06-24 08:15:27 -04:00
ioprio.c
Kconfig	fs/Kconfig: move nilfs2 out	2009-07-14 12:34:17 +09:00
Kconfig.binfmt
libfs.c	New helper - simple_fsync()	2009-06-11 21:36:11 -04:00
locks.c	lockd: call locks_release_private to cleanup per-filesystem state	2009-04-24 16:36:03 -04:00
Makefile	nilfs2: update makefile and Kconfig	2009-04-07 08:31:16 -07:00
mbcache.c
mpage.c	ext4: Properly initialize the buffer_head state	2009-05-13 15:13:42 -04:00
namei.c	integrity: add ima_counts_put (updated)	2009-06-29 08:59:10 +10:00
namespace.c	vfs: mnt_want_write_file(): fix special file handling	2009-08-07 10:39:56 -07:00
nfsctl.c
no-block.c
open.c	fs: Add new pre-allocation ioctls to vfs for compatibility with legacy xfs ioctls	2009-06-24 08:15:27 -04:00
pipe.c	lockdep: Fix lockdep annotation for pipe_double_lock()	2009-07-22 21:14:14 +02:00
pnode.c
pnode.h
posix_acl.c
read_write.c	splice: implement default splice_read method	2009-05-11 14:13:10 +02:00
read_write.h
readdir.c
select.c	poll/select: initialize triggered field of struct poll_wqueues	2009-08-15 18:40:11 -07:00
seq_file.c	seq_file: add function to write binary data	2009-06-18 13:03:57 -07:00
signalfd.c
splice.c	splice: fix kmaps in default_file_splice_write()	2009-05-19 11:37:46 +02:00
stack.c
stat.c	kill vfs_stat_fd / vfs_lstat_fd	2009-04-20 23:02:52 -04:00
super.c	... and the same for vfsmount id/mount group id	2009-06-24 08:15:26 -04:00
sync.c	sys_sync(): fix 16% performance regression in ffsb create_4k test	2009-07-06 13:57:03 -07:00
timerfd.c
utimes.c
xattr_acl.c
xattr.c	fs: introduce mnt_clone_write	2009-06-11 21:36:02 -04:00