[PATCH] r/o bind mounts: write counts for link/symlink

[linux-2.6-omap-h63xx.git] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index 3fbcf2021a2e5ac44181d569e4c03bad48379741..00df735fb50978c88f8267b769c86da6c860b6d9 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2387,7 +2387,12 @@ asmlinkage long sys_symlinkat(const char __user *oldname,
        if (IS_ERR(dentry))
                goto out_unlock;
 
+       error = mnt_want_write(nd.path.mnt);
+       if (error)
+               goto out_dput;
        error = vfs_symlink(nd.path.dentry->d_inode, dentry, from, S_IALLUGO);
+       mnt_drop_write(nd.path.mnt);
+out_dput:
        dput(dentry);
 out_unlock:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
@@ -2482,7 +2487,12 @@ asmlinkage long sys_linkat(int olddfd, const char __user *oldname,
        error = PTR_ERR(new_dentry);
        if (IS_ERR(new_dentry))
                goto out_unlock;
+       error = mnt_want_write(nd.path.mnt);
+       if (error)
+               goto out_dput;
        error = vfs_link(old_nd.path.dentry, nd.path.dentry->d_inode, new_dentry);
+       mnt_drop_write(nd.path.mnt);
+out_dput:
        dput(new_dentry);
 out_unlock:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);