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

Fix incomplete __mntput locking

2009-02-17T22:02:08+00:00

Getting this wrong caused

	WARNING: at fs/namespace.c:636 mntput_no_expire+0xac/0xf2()

due to optimistically checking cpu_writer->mnt outside the spinlock.

Here's what we really want:
 * we know that nobody will set cpu_writer->mnt to mnt from now on
 * all changes to that sucker are done under cpu_writer->lock
 * we want the laziest equivalent of
	spin_lock(&cpu_writer->lock);
	if (likely(cpu_writer->mnt != mnt)) {
		spin_unlock(&cpu_writer->lock);
		continue;
	}
	/* do stuff */
  that would make sure we won't miss earlier setting of ->mnt done by
  another CPU.

Anyway, for now we just move the spin_lock() earlier and move the test
into the properly locked region.

Signed-off-by: Al Viro 
Reported-and-tested-by: Li Zefan 
Signed-off-by: Linus Torvalds

[CVE-2009-0029] System call wrappers part 14

2009-01-14T13:15:24+00:00

Signed-off-by: Heiko Carstens

[CVE-2009-0029] System call wrappers part 10

2009-01-14T13:15:22+00:00

Signed-off-by: Heiko Carstens

fs/namespace.c: drop code after return

2008-12-31T23:07:38+00:00

The extra semicolon serves no purpose.

Signed-off-by: Julia Lawall 
Reviewed-by: Richard Genoud 
Cc: Al Viro 
Cc: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Al Viro

Merge branch 'master' into next

2008-11-14T00:29:12+00:00

Conflicts:
	security/keys/internal.h
	security/keys/process_keys.c
	security/keys/request_key.c

Fixed conflicts above by using the non 'tsk' versions.

Signed-off-by: James Morris

CRED: Wrap task credential accesses in the filesystem subsystem

2008-11-13T23:39:05+00:00

Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.

Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().

Change some task->e?[ug]id to task_e?[ug]id().  In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.

Signed-off-by: David Howells 
Reviewed-by: James Morris 
Acked-by: Serge Hallyn 
Cc: Al Viro 
Signed-off-by: James Morris

vfs: fix shrink_submounts

2008-11-13T01:17:17+00:00

In the last refactoring of shrink_submounts a variable was not completely
renamed.  So finish the renaming of mnt to m now.

Without this if you attempt to mount an nfs mount that has both automatic
nfs sub mounts on it, and has normal mounts on it.  The unmount will
succeed when it should not.

Signed-off-by: Eric W. Biederman 
Cc: Alexey Dobriyan 
Cc: Al Viro 
Signed-off-by: Linus Torvalds

[RFC PATCH] touch_mnt_namespace when the mount flags change

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

Daemons that need to be launched while the rootfs is read-only can now
poll /proc/mounts to be notified when their O_RDWR requests may no
longer end in EROFS.

Cc: Kay Sievers 
Cc: Neil Brown 
Signed-off-by: Dan Williams

[PATCH] no need for noinline stuff in fs/namespace.c anymore

2008-10-23T07:34:22+00:00

Stack footprint from hell had been due to many struct nameidata in there.
No more.

Signed-off-by: Al Viro

[PATCH] finally get rid of nameidata in namespace.c

2008-10-23T07:34:20+00:00

Signed-off-by: Al Viro