Please throw away what I send a moment ago, it was the wrong
patch.
This is on top of the ext2-reservations.patch in -mm.
The original r/o bind mount set didn't address the new
ext2 ioctl: EXT2_IOC_SETRSVSZ, because it doesn't exist
in mainline. This fixes that up for -mm.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
---
lxc-dave/fs/ext2/ioctl.c | 24 +++++++++++++++---------
1 file changed, 15 insertions(+), 9 deletions(-)
diff -puN fs/ext2/ioctl.c~ext2-reservations-take-writer-count fs/ext2/ioctl.c
--- lxc/fs/ext2/ioctl.c~ext2-reservations-take-writer-count 2007-09-24 13:08:29.000000000 -0700
+++ lxc-dave/fs/ext2/ioctl.c 2007-09-24 13:12:09.000000000 -0700
@@ -111,14 +111,18 @@ setflags_out:
if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
return -ENOTTY;
- if (IS_RDONLY(inode))
- return -EROFS;
-
- if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
- return -EACCES;
-
- if (get_user(rsv_window_size, (int __user *)arg))
- return -EFAULT;
+ ret = mnt_want_write(filp->f_vfsmnt);
+ if (ret)
+ return ret;
+
+ if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) {
+ ret = -EACCES;
+ goto setrsvsz_out;
+ }
+ if (get_user(rsv_window_size, (int __user *)arg)) {
+ ret = -EFAULT;
+ goto setrsvsz_out;
+ }
if (rsv_window_size > EXT2_MAX_RESERVE_BLOCKS)
rsv_window_size = EXT2_MAX_RESERVE_BLOCKS;
@@ -140,7 +144,9 @@ setflags_out:
rsv->rsv_goal_size = rsv_window_size;
}
mutex_unlock(&ei->truncate_mutex);
- return 0;
+ setrsvsz_out:
+ mnt_drop_write(filp->f_vfsmnt);
+ return ret;
}
default:
return -ENOTTY;
diff -puN fs/namespace.c~ext2-reservations-take-writer-count fs/namespace.c
_
-
