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Subject[PATCH 11/24] elevate write count for link and symlink calls
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Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
---
lxc-dave/fs/namei.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff -puN fs/namei.c~elevate-write-count-for-link-and-symlink-calls fs/namei.c
--- lxc/fs/namei.c~elevate-write-count-for-link-and-symlink-calls 2007-09-17 09:44:02.000000000 -0700
+++ lxc-dave/fs/namei.c 2007-09-17 09:44:02.000000000 -0700
@@ -2324,7 +2324,12 @@ 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);
@@ -2419,7 +2424,12 @@ 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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