linux-stable.git/include/linux/fs.h, branch v2.6.30

Fix races around the access to ->s_options

2009-05-09T14:51:34+00:00

Put generic_show_options read access to s_options under rcu_read_lock,
split save_mount_options() into "we are setting it the first time"
(uses in foo_fill_super()) and "we are relacing and freeing the old one",
synchronize_rcu() before kfree() in the latter.

Signed-off-by: Al Viro

Switch open_exec() and sys_uselib() to do_open_filp()

2009-05-09T14:49:42+00:00

... and make path_lookup_open() static

Signed-off-by: Al Viro

New helper: deactivate_locked_super()

2009-05-09T14:49:39+00:00

Does equivalent of up_write(&s->s_umount); deactivate_super(s);
However, it does not does not unlock it until it's all over.
As the result, it's safe to use to dispose of new superblock on ->get_sb()
failure exits - nobody will see the sucker until it's all over.
Equivalent using up_write/deactivate_super is safe for that purpose
if superblock is either	safe to use or has NULL ->s_root when we unlock.
Normally filesystems take the required precautions, but
	a) we do have bugs in that area in some of them.
	b) up_write/deactivate_super sequence is extremely common,
so the helper makes sense anyway.

Signed-off-by: Al Viro

fs: Mark get_filesystem_list() as __init function.

2009-04-21T03:02:52+00:00

"int get_filesystem_list(char * buf)" is called by only
"static void __init get_fs_names(char *page)".
We can mark get_filesystem_list() as "__init".

Signed-off-by: Tetsuo Handa 
Signed-off-by: Al Viro

kill vfs_stat_fd / vfs_lstat_fd

2009-04-21T03:02:52+00:00

There's really no reason to keep vfs_stat_fd and vfs_lstat_fd with
Oleg's vfs_fstatat.  Use vfs_fstatat for the few cases having the
directory fd, and switch all others to vfs_stat / vfs_lstat.

Reviewed-by: Christoph Hellwig 

Signed-off-by: Al Viro

Separate out common fstatat code into vfs_fstatat

2009-04-21T03:02:51+00:00

This is a version incorporating Christoph's suggestion.

Separate out common *fstatat functionality into a single function
instead of duplicating it all over the code.

Signed-off-by: Oleg Drokin 
Signed-off-by: Al Viro

splice: add helpers for locking pipe inode

2009-04-15T10:10:12+00:00

There are lots of sequences like this, especially in splice code:

	if (pipe->inode)
		mutex_lock(&pipe->inode->i_mutex);
	/* do something */
	if (pipe->inode)
		mutex_unlock(&pipe->inode->i_mutex);

so introduce helpers which do the conditional locking and unlocking.
Also replace the inode_double_lock() call with a pipe_double_lock()
helper to avoid spreading the use of this functionality beyond the
pipe code.

This patch is just a cleanup, and should cause no behavioral changes.

Signed-off-by: Miklos Szeredi 
Signed-off-by: Jens Axboe

splice: remove generic_file_splice_write_nolock()

2009-04-15T10:10:12+00:00

Remove the now unused generic_file_splice_write_nolock() function.
It's conceptually broken anyway, because splice may need to wait for
pipe events so holding locks across the whole operation is wrong.

Signed-off-by: Miklos Szeredi 
Signed-off-by: Jens Axboe

Document and move the various READ/WRITE types

2009-04-15T06:28:10+00:00

It's a somewhat twisty maze of hints and behavioural modifiers, try
and clear it up a bit with some documentation.

Signed-off-by: Jens Axboe

namespaces: move proc_net_get_sb to a generic fs/super.c helper

2009-04-07T15:31:09+00:00

The mqueuefs filesystem will use this helper as well.  Proc's main get_sb
could also be made to use it, but that will require a bit more rework.

Signed-off-by: Serge E. Hallyn 
Cc: Cedric Le Goater 
Cc: Alexey Dobriyan 
Cc: "David S. Miller" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds