linux.git/fs/libfs.c, branch v2.6.29

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

2009-01-06T02:32:06+00:00

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  inotify: fix type errors in interfaces
  fix breakage in reiserfs_new_inode()
  fix the treatment of jfs special inodes
  vfs: remove duplicate code in get_fs_type()
  add a vfs_fsync helper
  sys_execve and sys_uselib do not call into fsnotify
  zero i_uid/i_gid on inode allocation
  inode->i_op is never NULL
  ntfs: don't NULL i_op
  isofs check for NULL ->i_op in root directory is dead code
  affs: do not zero ->i_op
  kill suid bit only for regular files
  vfs: lseek(fd, 0, SEEK_CUR) race condition

zero i_uid/i_gid on inode allocation

2009-01-05T16:54:28+00:00

... and don't bother in callers.  Don't bother with zeroing i_blocks,
while we are at it - it's already been zeroed.

i_mode is not worth the effort; it has no common default value.

Signed-off-by: Al Viro

fs: symlink write_begin allocation context fix

2009-01-04T21:33:20+00:00

With the write_begin/write_end aops, page_symlink was broken because it
could no longer pass a GFP_NOFS type mask into the point where the
allocations happened.  They are done in write_begin, which would always
assume that the filesystem can be entered from reclaim.  This bug could
cause filesystem deadlocks.

The funny thing with having a gfp_t mask there is that it doesn't really
allow the caller to arbitrarily tinker with the context in which it can be
called.  It couldn't ever be GFP_ATOMIC, for example, because it needs to
take the page lock.  The only thing any callers care about is __GFP_FS
anyway, so turn that into a single flag.

Add a new flag for write_begin, AOP_FLAG_NOFS.  Filesystems can now act on
this flag in their write_begin function.  Change __grab_cache_page to
accept a nofs argument as well, to honour that flag (while we're there,
change the name to grab_cache_page_write_begin which is more instructive
and does away with random leading underscores).

This is really a more flexible way to go in the end anyway -- if a
filesystem happens to want any extra allocations aside from the pagecache
ones in ints write_begin function, it may now use GFP_KERNEL (rather than
GFP_NOFS) for common case allocations (eg.  ocfs2_alloc_write_ctxt, for a
random example).

[kosaki.motohiro@jp.fujitsu.com: fix ubifs]
[kosaki.motohiro@jp.fujitsu.com: fix fuse]
Signed-off-by: Nick Piggin 
Reviewed-by: KOSAKI Motohiro 
Cc: 		[2.6.28.x]
Signed-off-by: KOSAKI Motohiro 
Signed-off-by: Andrew Morton 
[ Cleaned up the calling convention: just pass in the AOP flags
  untouched to the grab_cache_page_write_begin() function.  That
  just simplifies everybody, and may even allow future expansion of the
  logic.   - Linus ]
Signed-off-by: Linus Torvalds

fs: remove prepare_write/commit_write

2008-10-30T18:38:45+00:00

Nothing uses prepare_write or commit_write. Remove them from the tree
completely.

[akpm@linux-foundation.org: schedule simple_prepare_write() for unexporting]
Signed-off-by: Nick Piggin 
Cc: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] new helper: d_obtain_alias

2008-10-23T09:13:00+00:00

The calling conventions of d_alloc_anon are rather unfortunate for all
users, and it's name is not very descriptive either.

Add d_obtain_alias as a new exported helper that drops the inode
reference in the failure case, too and allows to pass-through NULL
pointers and inodes to allow for tail-calls in the export operations.

Incidentally this helper already existed as a private function in
libfs.c as exportfs_d_alloc so kill that one and switch the callers
to d_obtain_alias.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Al Viro

VFS: increase pseudo-filesystem block size to PAGE_SIZE

2008-07-30T16:41:44+00:00

This commit:

    commit ba52de123d454b57369f291348266d86f4b35070
    Author: Theodore Ts'o 
    Date:   Wed Sep 27 01:50:49 2006 -0700

        [PATCH] inode-diet: Eliminate i_blksize from the inode structure

caused the block size used by pseudo-filesystems to decrease from
PAGE_SIZE to 1024 leading to a doubling of the number of context switches
during a kernbench run.

Signed-off-by: Alex Nixon 
Cc: Andi Kleen 
Cc: Jeremy Fitzhardinge 
Cc: Peter Zijlstra 
Cc: Ingo Molnar 
Cc: Ian Campbell 
Cc: "Theodore Ts'o" 
Cc: Alexander Viro 
Cc: Hugh Dickins 
Cc: Jens Axboe 
Cc: 		[2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

add kernel-doc for simple_read_from_buffer and memory_read_from_buffer

2008-07-04T17:40:07+00:00

Add kernel-doc comments describing simple_read_from_buffer and
memory_read_from_buffer.

Signed-off-by: Akinobu Mita 
Cc: Christoph Hellwig 
Cc: "Randy.Dunlap" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

introduce memory_read_from_buffer()

2008-06-06T18:29:11+00:00

This patch introduces memory_read_from_buffer().

The only difference between memory_read_from_buffer() and
simple_read_from_buffer() is which address space the function copies to.

simple_read_from_buffer copies to user space memory.
memory_read_from_buffer copies to normal memory.

Signed-off-by: Akinobu Mita 
Cc: Al Viro 
Cc: Doug Warzecha 
Cc: Zhang Rui 
Cc: Matt Domsch 
Cc: Abhay Salunke 
Cc: Greg Kroah-Hartman 
Cc: Markus Rechberger 
Cc: Kay Sievers 
Cc: Bob Moore 
Cc: Thomas Renninger 
Cc: Len Brown 
Cc: Benjamin Herrenschmidt 
Cc: "Antonino A. Daplas" 
Cc: Krzysztof Helt 
Cc: Geert Uytterhoeven 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: Peter Oberparleiter 
Cc: Michael Holzheu 
Cc: Brian King 
Cc: James E.J. Bottomley 
Cc: Andrew Vasquez 
Cc: Seokmann Ju 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

libfs: rename simple_attr_close to simple_attr_release

2008-02-08T17:22:34+00:00

simple_attr_close implementes ->release so it should be named accordingly.

Signed-off-by: Christoph Hellwig 
Cc: 
Cc: Arnd Bergmann 
Cc: Greg KH 
Cc: Al Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

libfs: make simple attributes interruptible

2008-02-08T17:22:34+00:00

Use mutex_lock_interruptible in simple_attr_read/write.

Signed-off-by: Christoph Hellwig 
Cc: 
Cc: Arnd Bergmann 
Cc: Greg KH 
Cc: Al Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds