[RFC][PATCH 14/27] sys_linkat(): elevate write count around vfs_link()

From: Dave Hansen
Date: Wed Jul 12 2006 - 14:22:13 EST




Signed-off-by: Dave Hansen <haveblue@xxxxxxxxxx>
---

lxc-dave/fs/namei.c | 5 +++++
1 files changed, 5 insertions(+)

diff -puN fs/namei.c~C-elevate-writers-vfs_link-part1 fs/namei.c
--- lxc/fs/namei.c~C-elevate-writers-vfs_link-part1 2006-07-12 11:09:29.000000000 -0700
+++ lxc-dave/fs/namei.c 2006-07-12 11:09:31.000000000 -0700
@@ -2313,7 +2313,12 @@ asmlinkage long sys_linkat(int olddfd, c
error = PTR_ERR(new_dentry);
if (IS_ERR(new_dentry))
goto out_unlock;
+ error = mnt_want_write(nd.mnt);
+ if (error)
+ goto out_dput;
error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
+ mnt_drop_write(nd.mnt);
+out_dput:
dput(new_dentry);
out_unlock:
mutex_unlock(&nd.dentry->d_inode->i_mutex);
_
-
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