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| author | Dave Hansen <haveblue@us.ibm.com> | 2008-02-15 14:37:56 -0800 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2008-04-19 00:29:27 -0400 |
| commit | 2c463e95480829a2fe8f386589516e13b1289db6 (patch) | |
| tree | 7294d93a15f62ccc2c649ef9782b7f85ae7d1ef8 /fs/nfs/dir.c | |
| parent | ec82687f29127a954dd0da95dc1e0a4ce92b560c (diff) | |
| download | kernel-crypto-2c463e95480829a2fe8f386589516e13b1289db6.tar.gz kernel-crypto-2c463e95480829a2fe8f386589516e13b1289db6.tar.xz kernel-crypto-2c463e95480829a2fe8f386589516e13b1289db6.zip | |
[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>
Diffstat (limited to 'fs/nfs/dir.c')
| -rw-r--r-- | fs/nfs/dir.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 6cea7479c5b..d9e30ac2798 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -967,7 +967,8 @@ static int is_atomic_open(struct inode *dir, struct nameidata *nd) if (nd->flags & LOOKUP_DIRECTORY) return 0; /* Are we trying to write to a read only partition? */ - if (IS_RDONLY(dir) && (nd->intent.open.flags & (O_CREAT|O_TRUNC|FMODE_WRITE))) + if (__mnt_is_readonly(nd->path.mnt) && + (nd->intent.open.flags & (O_CREAT|O_TRUNC|FMODE_WRITE))) return 0; return 1; } |