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authorKinglong Mee <kinglongmee@gmail.com>2014-03-24 11:59:46 +0800
committerJ. Bruce Fields <bfields@redhat.com>2014-03-30 10:47:36 -0400
commitd531c008d7d9713456abe3d265fc577bba2e1cef (patch)
treeeea8a68155e98ba647ba006d24df0efd3ecf3a49 /include/linux/sunrpc/xprt.h
parent83ddfebdd21da669918d7f9854fd592858625f4b (diff)
NFSD/SUNRPC: Check rpc_xprt out of xs_setup_bc_tcp
Besides checking rpc_xprt out of xs_setup_bc_tcp, increase it's reference (it's important). Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'include/linux/sunrpc/xprt.h')
-rw-r--r--include/linux/sunrpc/xprt.h13
1 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 8097b9df677..3e5efb2b236 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -295,13 +295,24 @@ int xprt_adjust_timeout(struct rpc_rqst *req);
void xprt_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task);
void xprt_release_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task);
void xprt_release(struct rpc_task *task);
-struct rpc_xprt * xprt_get(struct rpc_xprt *xprt);
void xprt_put(struct rpc_xprt *xprt);
struct rpc_xprt * xprt_alloc(struct net *net, size_t size,
unsigned int num_prealloc,
unsigned int max_req);
void xprt_free(struct rpc_xprt *);
+/**
+ * xprt_get - return a reference to an RPC transport.
+ * @xprt: pointer to the transport
+ *
+ */
+static inline struct rpc_xprt *xprt_get(struct rpc_xprt *xprt)
+{
+ if (atomic_inc_not_zero(&xprt->count))
+ return xprt;
+ return NULL;
+}
+
static inline __be32 *xprt_skip_transport_header(struct rpc_xprt *xprt, __be32 *p)
{
return p + xprt->tsh_size;