Tejun Heo fb6896da37 sysfs: restructure add/remove paths and fix inode update ... The original add/remove code had the following problems. * parent's timestamps are updated on dentry instantiation. this is incorrect with reclaimable files. * updating parent's timestamps isn't synchronized. * parent nlink update assumes the inode is accessible which won't be true once directory dentries are made reclaimable. This patch restructures add/remove paths to resolve the above problems. Add/removal are done in the following steps. 1. sysfs_addrm_start() : acquire locks including sysfs_mutex and other resources. 2-a. sysfs_add_one() : add new sd. linking the new sd into the children list is caller's responsibility. 2-b. sysfs_remove_one() : remove a sd. unlinking the sd from the children list is caller's responsibility. 3. sysfs_addrm_finish() : release all resources and clean up. Steps 2-a and/or 2-b can be repeated multiple times. Parent's inode is looked up during sysfs_addrm_start(). If available (always at the moment), it's pinned and nlink is updated as sd's are added and removed. Timestamps are updated during finish if any sd has been added or removed. If parent's inode is not available during start, sysfs_mutex ensures that parent inode is not created till add/remove is complete. All the complexity is contained inside the helper functions. Especially, dentry/inode handling is properly hidden from the rest of sysfs which now mostly operate on sysfs_dirents. As an added bonus, codes which use these helpers to add and remove sysfs_dirents are now more structured and simpler. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2007-07-11 16:09:09 -07:00
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9p	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
adfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
affs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
afs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
autofs	Replace pid_t in autofs with struct pid reference	2007-05-11 08:29:36 -07:00
autofs4	Fix some coding-style errors in autofs	2007-05-11 08:29:36 -07:00
befs	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
bfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
cifs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
coda	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
configfs	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
cramfs	mm: make read_cache_page synchronous	2007-05-07 12:12:51 -07:00
debugfs	debugfs: add rename for debugfs files	2007-07-11 16:09:00 -07:00
devpts	devpts: add fsnotify create event	2007-05-08 11:14:59 -07:00
dlm	[DLM] dump more lock values	2007-07-09 08:24:13 +01:00
ecryptfs	sysfs: kill unnecessary attribute->owner	2007-07-11 16:09:06 -07:00
efs	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
exportfs	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
ext2	xip sendfile removal	2007-07-10 08:04:15 +02:00
ext3	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
ext4	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
fat	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
freevxfs	freevxfs: possible null pointer dereference fix	2007-05-08 11:14:59 -07:00
fuse	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
gfs2	Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw	2007-07-10 13:56:13 -07:00
hfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
hfsplus	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
hostfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
hpfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
hppfs	[PATCH] Mark struct super_operations const	2007-02-12 09:48:47 -08:00
hugetlbfs	shm: fix the filename of hugetlb sysv shared memory	2007-06-16 13:16:16 -07:00
isofs	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
jbd	fix file specification in comments	2007-05-09 08:58:16 +02:00
jbd2	fix file specification in comments	2007-05-09 08:58:16 +02:00
jffs2	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
jfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
lockd	NLM: Fix sparse warnings	2007-05-14 19:33:46 -04:00
minix	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
msdos	[PATCH] mark struct inode_operations const 2	2007-02-12 09:48:46 -08:00
ncpfs	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
nfs	sendfile: convert nfs to using splice_read()	2007-07-10 08:04:14 +02:00
nfs_common
nfsd	pipe: change the ->pin() operation to ->confirm()	2007-07-10 08:04:15 +02:00
nls
ntfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
ocfs2	sysfs: kill unnecessary attribute->owner	2007-07-11 16:09:06 -07:00
openpromfs	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
partitions	sysfs: kill unnecessary attribute->owner	2007-07-11 16:09:06 -07:00
proc	sched: scheduler debugging, core	2007-07-09 18:52:00 +02:00
qnx4	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
ramfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
reiserfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
romfs	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
smbfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
sysfs	sysfs: restructure add/remove paths and fix inode update	2007-07-11 16:09:09 -07:00
sysv	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
udf	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
ufs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
vfat	[PATCH] mark struct inode_operations const 3	2007-02-12 09:48:46 -08:00
xfs	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
aio.c	signal/timer/event: KAIO eventfd support example	2007-05-11 08:29:37 -07:00
anon_inodes.c	signal/timer/event fds: anonymous inode source	2007-05-11 08:29:36 -07:00
attr.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
bad_inode.c	sendfile: remove bad_sendfile() from bad_file_ops	2007-07-10 08:04:15 +02:00
binfmt_aout.c
binfmt_elf.c	Fix elf_core_dump() when writing arch specific notes (spu coredumps)	2007-07-06 10:23:43 -07:00
binfmt_elf_fdpic.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
binfmt_em86.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
binfmt_flat.c	nommu: report correct errno in message	2007-06-08 17:23:32 -07:00
binfmt_misc.c	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
binfmt_script.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
binfmt_som.c
bio.c	unexport bio_{,un}map_user	2007-07-10 08:03:34 +02:00
block_dev.c	sendfile: remove .sendfile from filesystems that use generic_file_sendfile()	2007-07-10 08:04:13 +02:00
buffer.c	Fix "fs: convert core functions to zero_user_page"	2007-05-21 09:15:32 -07:00
char_dev.c	[PATCH] remove protection of LANANA-reserved majors	2007-04-04 21:12:47 -07:00
compat.c	optimize compat_core_sys_select() by a using stack space for small fd sets	2007-05-23 20:14:12 -07:00
compat_ioctl.c	fix compat console unimap regression	2007-05-25 17:37:46 -07:00
dcache.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
dcookies.c
direct-io.c	dio: remove bogus refcounting BUG_ON	2007-07-03 18:23:23 -07:00
dnotify.c
dquot.c	circular locking dependency found in QUOTA OFF	2007-05-17 05:23:05 -07:00
drop_caches.c	[PATCH] remove invalidate_inode_pages()	2007-02-11 10:51:31 -08:00
eventfd.c	eventfd use waitqueue lock ...	2007-05-18 13:09:34 -07:00
eventpoll.c	epoll: move kfree inside ep_free	2007-05-15 08:54:00 -07:00
exec.c	uselib: add missing MNT_NOEXEC check	2007-05-23 20:14:13 -07:00
fcntl.c	[PATCH] fdtable: Make fdarray and fdsets equal in size	2006-12-10 09:57:22 -08:00
fifo.c	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
file.c	[PATCH] fdtable: Provide free_fdtable() wrapper	2006-12-22 08:55:50 -08:00
file_table.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
filesystems.c	add filesystem subtype support	2007-05-08 11:15:01 -07:00
fs-writeback.c	Write back inode data pages even when the inode itself is locked	2007-01-26 12:53:20 -08:00
generic_acl.c
inode.c	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
inotify.c	Introduce a handy list_first_entry macro	2007-05-08 11:15:11 -07:00
inotify_user.c	[PATCH] inotify: read return val fix	2007-02-12 09:48:28 -08:00
internal.h	cleanup compat ioctl handling	2007-05-08 11:15:09 -07:00
ioctl.c	vanishing ioctl handler debugging	2007-06-04 13:25:10 -07:00
ioprio.c	[PATCH] pid: replace do/while_each_task_pid with do/while_each_pid_task	2007-02-12 09:48:32 -08:00
Kconfig	Remove obsolete fat_cvf help text	2007-05-09 08:58:15 +02:00
Kconfig.binfmt	fs: Kill sh dependency for binfmt_flat.	2007-05-21 14:34:00 +09:00
libfs.c	fs/libfs.c: >80 columns line break fix	2007-05-09 06:44:57 +02:00
locks.c	Remove SLAB_CTOR_CONSTRUCTOR	2007-05-17 05:23:04 -07:00
Makefile	signal/timer/event: eventfd core	2007-05-11 08:29:36 -07:00
mbcache.c
mpage.c	consolidate generic_writepages and mpage_writepages	2007-05-11 08:29:35 -07:00
namei.c	[PATCH] complete message queue auditing	2007-05-11 05:38:26 -04:00
namespace.c	check privileges before setting mount propagation	2007-05-08 11:15:12 -07:00
nfsctl.c
no-block.c
open.c	Remove suid/sgid bits on [f]truncate()	2007-05-08 20:10:00 -07:00
pipe.c	pipe: add documentation and comments	2007-07-10 08:04:16 +02:00
pnode.c	Introduce a handy list_first_entry macro	2007-05-08 11:15:11 -07:00
pnode.h
posix_acl.c
quota.c	circular locking dependency found in QUOTA OFF	2007-05-17 05:23:05 -07:00
quota_v1.c
quota_v2.c
read_write.c	Remove remnants of sendfile()	2007-07-10 08:04:15 +02:00
read_write.h
readdir.c	ROUND_UP macro cleanup in fs/(select|compat|readdir).c	2007-05-08 11:15:09 -07:00
select.c	Style fix in fs/select.c	2007-05-09 07:10:02 +02:00
seq_file.c	Make common helpers for seq_files that work with list_heads	2007-07-10 17:51:13 -07:00
signalfd.c	avoid spurious POLLIN returns in signalfd	2007-06-28 11:34:54 -07:00
splice.c	pipe: add documentation and comments	2007-07-10 08:04:16 +02:00
stack.c	[PATCH] fs/stack.c: Copy i_nlink after all other attributes are copied	2007-02-19 14:21:50 -08:00
stat.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
super.c	add filesystem subtype support	2007-05-08 11:15:01 -07:00
sync.c	Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM	2007-06-28 11:38:30 -07:00
timerfd.c	timerfd use waitqueue lock ...	2007-05-18 13:09:34 -07:00
utimes.c	Fix permission checking for the new utimensat() system call	2007-07-08 12:02:55 -07:00
xattr.c	[PATCH] audit inode for all xattr syscalls	2007-05-11 05:38:26 -04:00
xattr_acl.c	[PATCH] remove many unneeded #includes of sched.h	2007-02-14 08:09:54 -08:00