[patch 13/22] elevate write count for link and symlink calls
Cedric Le Goater
clg at fr.ibm.com
Thu Jun 7 08:25:40 PDT 2007
From: Dave Hansen <hansendc at us.ibm.com>
Signed-off-by: Dave Hansen <hansendc at us.ibm.com>
---
---
fs/namei.c | 10 ++++++++++
1 file changed, 10 insertions(+)
Index: 2.6.22-rc4-mm2-robindmount/fs/namei.c
===================================================================
--- 2.6.22-rc4-mm2-robindmount.orig/fs/namei.c
+++ 2.6.22-rc4-mm2-robindmount/fs/namei.c
@@ -2296,7 +2296,12 @@ 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);
@@ -2391,7 +2396,12 @@ 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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