[RFC][PATCH 12/27] sys_symlinkat() elevate write count around vfs_symlink()


Signed-off-by: Dave Hansen <[email protected]>
---

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

diff -puN fs/namei.c~C-elevate-writers-vfs_symlink-part3 fs/namei.c
--- lxc/fs/namei.c~C-elevate-writers-vfs_symlink-part3	2006-07-12 11:09:27.000000000 -0700
+++ lxc-dave/fs/namei.c	2006-07-12 11:09:29.000000000 -0700
@@ -2213,7 +2213,12 @@ asmlinkage long sys_symlinkat(const char
 	if (IS_ERR(dentry))
 		goto out_unlock;
 
+	error = mnt_want_write(nd.mnt);
+	if (error)
+		goto out_dput;
 	error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO);
+	mnt_drop_write(nd.mnt);
+out_dput:
 	dput(dentry);
 out_unlock:
 	mutex_unlock(&nd.dentry->d_inode->i_mutex);
_
-
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References:
- [RFC][PATCH 00/27] Mount writer count and read-only bind mounts (v4)
  - From: Dave Hansen <[email protected]>

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