SUNRPC: Enable non-exclusive create in rpc_mkpipe()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 2320f1e..ebcb805 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -621,7 +621,7 @@
}
static struct dentry *
-rpc_lookup_create(struct dentry *parent, const char *name, int len)
+rpc_lookup_create(struct dentry *parent, const char *name, int len, int exclusive)
{
struct inode *dir = parent->d_inode;
struct dentry *dentry;
@@ -630,7 +630,7 @@
dentry = lookup_one_len(name, parent, len);
if (IS_ERR(dentry))
goto out_err;
- if (dentry->d_inode) {
+ if (dentry->d_inode && exclusive) {
dput(dentry);
dentry = ERR_PTR(-EEXIST);
goto out_err;
@@ -649,7 +649,7 @@
if ((error = rpc_lookup_parent(path, nd)) != 0)
return ERR_PTR(error);
- dentry = rpc_lookup_create(nd->dentry, nd->last.name, nd->last.len);
+ dentry = rpc_lookup_create(nd->dentry, nd->last.name, nd->last.len, 1);
if (IS_ERR(dentry))
rpc_release_path(nd);
return dentry;
@@ -716,10 +716,20 @@
struct inode *dir, *inode;
struct rpc_inode *rpci;
- dentry = rpc_lookup_create(parent, name, strlen(name));
+ dentry = rpc_lookup_create(parent, name, strlen(name), 0);
if (IS_ERR(dentry))
return dentry;
dir = parent->d_inode;
+ if (dentry->d_inode) {
+ rpci = RPC_I(dentry->d_inode);
+ if (rpci->private != private ||
+ rpci->ops != ops ||
+ rpci->flags != flags) {
+ dput (dentry);
+ dentry = ERR_PTR(-EBUSY);
+ }
+ goto out;
+ }
inode = rpc_get_inode(dir->i_sb, S_IFIFO | S_IRUSR | S_IWUSR);
if (!inode)
goto err_dput;