tree 7294d93a15f62ccc2c649ef9782b7f85ae7d1ef8
parent ec82687f29127a954dd0da95dc1e0a4ce92b560c
author Dave Hansen <haveblue@us.ibm.com> 1203115076 -0800
committer Al Viro <viro@zeniv.linux.org.uk> 1208579367 -0400

[PATCH] r/o bind mounts: check mnt instead of superblock directly

If we depend on the inodes for writeability, we will not catch the r/o mounts
when implemented.

This patches uses __mnt_want_write().  It does not guarantee that the mount
will stay writeable after the check.  But, this is OK for one of the checks
because it is just for a printk().

The other two are probably unnecessary and duplicate existing checks in the
VFS.  This won't make them better checks than before, but it will make them
detect r/o mounts.

Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>