[PATCH 19/25] elevate write count for do_utimes()

[Dave Hansen <haveblue@us.ibm.com>]

Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
---

 lxc-dave/fs/utimes.c |   15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff -puN fs/utimes.c~elevate-write-count-for-do-utimes fs/utimes.c
--- lxc/fs/utimes.c~elevate-write-count-for-do-utimes	2007-09-20 12:16:20.000000000 -0700
+++ lxc-dave/fs/utimes.c	2007-09-20 12:16:20.000000000 -0700
@@ -2,6 +2,7 @@
 #include <linux/file.h>
 #include <linux/fs.h>
 #include <linux/linkage.h>
+#include <linux/mount.h>
 #include <linux/namei.h>
 #include <linux/sched.h>
 #include <linux/stat.h>
@@ -75,8 +76,8 @@ long do_utimes(int dfd, char __user *fil
 
 	inode = dentry->d_inode;
 
-	error = -EROFS;
-	if (IS_RDONLY(inode))
+	error = mnt_want_write(nd.mnt);
+	if (error)
 		goto dput_and_out;
 
 	/* Don't worry, the checks are done in inode_change_ok() */
@@ -84,7 +85,7 @@ long do_utimes(int dfd, char __user *fil
 	if (times) {
 		error = -EPERM;
                 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
-                        goto dput_and_out;
+			goto mnt_drop_write_and_out;
 
 		if (times[0].tv_nsec == UTIME_OMIT)
 			newattrs.ia_valid &= ~ATTR_ATIME;
@@ -104,22 +105,24 @@ long do_utimes(int dfd, char __user *fil
 	} else {
 		error = -EACCES;
                 if (IS_IMMUTABLE(inode))
-                        goto dput_and_out;
+			goto mnt_drop_write_and_out;
 
 		if (!is_owner_or_cap(inode)) {
 			if (f) {
 				if (!(f->f_mode & FMODE_WRITE))
-					goto dput_and_out;
+					goto mnt_drop_write_and_out;
 			} else {
 				error = vfs_permission(&nd, MAY_WRITE);
 				if (error)
-					goto dput_and_out;
+					goto mnt_drop_write_and_out;
 			}
 		}
 	}
 	mutex_lock(&inode->i_mutex);
 	error = notify_change(dentry, &newattrs);
 	mutex_unlock(&inode->i_mutex);
+mnt_drop_write_and_out:
+	mnt_drop_write(nd.mnt);
 dput_and_out:
 	if (f)
 		fput(f);
_
-
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