diff options
| author | Dave Hansen <haveblue@us.ibm.com> | 2008-02-16 01:37:52 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2008-04-19 08:29:25 +0400 |
| commit | 9ac9b8474c39c3ae2c2b37d8e1f08db8a9146124 (patch) | |
| tree | e630074f48b8edd7a54805e5fb9b2b15896d052f /fs | |
| parent | 2af482a7edfb8810539cacc2fdd8242611ca43bb (diff) | |
| download | linux-9ac9b8474c39c3ae2c2b37d8e1f08db8a9146124.tar.xz | |
[PATCH] r/o bind mounts: write counts for truncate()
Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/open.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/fs/open.c b/fs/open.c index e2df8fd1eb0b..4d690e33446f 100644 --- a/fs/open.c +++ b/fs/open.c @@ -244,21 +244,21 @@ static long do_sys_truncate(const char __user * path, loff_t length) if (!S_ISREG(inode->i_mode)) goto dput_and_out; - error = vfs_permission(&nd, MAY_WRITE); + error = mnt_want_write(nd.path.mnt); if (error) goto dput_and_out; - error = -EROFS; - if (IS_RDONLY(inode)) - goto dput_and_out; + error = vfs_permission(&nd, MAY_WRITE); + if (error) + goto mnt_drop_write_and_out; error = -EPERM; if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) - goto dput_and_out; + goto mnt_drop_write_and_out; error = get_write_access(inode); if (error) - goto dput_and_out; + goto mnt_drop_write_and_out; /* * Make sure that there are no leases. get_write_access() protects @@ -276,6 +276,8 @@ static long do_sys_truncate(const char __user * path, loff_t length) put_write_and_out: put_write_access(inode); +mnt_drop_write_and_out: + mnt_drop_write(nd.path.mnt); dput_and_out: path_put(&nd.path); out: |