[PATCH 17/22] elevate mnt writers for vfs_unlink() callers

[Dave Hansen]

Signed-off-by: Dave Hansen <[EMAIL PROTECTED]>
---

 lxc-dave/fs/namei.c   |    4 ++++
 lxc-dave/ipc/mqueue.c |    5 ++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff -puN fs/namei.c~19-24-elevate-mnt-writers-for-vfs-unlink-callers fs/namei.c
--- lxc/fs/namei.c~19-24-elevate-mnt-writers-for-vfs-unlink-callers     
2007-02-09 14:26:57.000000000 -0800
+++ lxc-dave/fs/namei.c 2007-02-09 14:26:57.000000000 -0800
@@ -2181,7 +2181,11 @@ static long do_unlinkat(int dfd, const c
                inode = dentry->d_inode;
                if (inode)
                        atomic_inc(&inode->i_count);
+               error = mnt_want_write(nd.mnt);
+               if (error)
+                       goto exit2;
                error = vfs_unlink(nd.dentry->d_inode, dentry);
+               mnt_drop_write(nd.mnt);
        exit2:
                dput(dentry);
        }
diff -puN ipc/mqueue.c~19-24-elevate-mnt-writers-for-vfs-unlink-callers 
ipc/mqueue.c
--- lxc/ipc/mqueue.c~19-24-elevate-mnt-writers-for-vfs-unlink-callers   
2007-02-09 14:26:57.000000000 -0800
+++ lxc-dave/ipc/mqueue.c       2007-02-09 14:26:57.000000000 -0800
@@ -749,8 +749,11 @@ asmlinkage long sys_mq_unlink(const char
        inode = dentry->d_inode;
        if (inode)
                atomic_inc(&inode->i_count);
-
+       err = mnt_want_write(mqueue_mnt);
+       if (err)
+               goto out_err;
        err = vfs_unlink(dentry->d_parent->d_inode, dentry);
+       mnt_drop_write(mqueue_mnt);
 out_err:
        dput(dentry);
 
_
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