SUNRPC: Support dynamic slot allocation for TCP connections

[karo-tx-linux.git] / include / linux / sunrpc / xprt.h

diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 05047250f2180f94b268e4ed94df32e0b407a042..d02762d1de279a600cac7251219fef8403f6cbcc 100644 (file)
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -22,6 +22,7 @@
 #define RPC_MIN_SLOT_TABLE     (2U)
 #define RPC_DEF_SLOT_TABLE     (16U)
 #define RPC_MAX_SLOT_TABLE     (128U)
+#define RPC_MAX_SLOT_TABLE_LIMIT       (65536U)
 
 /*
  * This describes a timeout strategy
@@ -168,7 +169,9 @@ struct rpc_xprt {
        struct rpc_wait_queue   pending;        /* requests in flight */
        struct rpc_wait_queue   backlog;        /* waiting for slot */
        struct list_head        free;           /* free slots */
-       unsigned int            max_reqs;       /* total slots */
+       unsigned int            max_reqs;       /* max number of slots */
+       unsigned int            min_reqs;       /* min number of slots */
+       atomic_t                num_reqs;       /* total slots */
        unsigned long           state;          /* transport state */
        unsigned char           shutdown   : 1, /* being shut down */
                                resvport   : 1; /* use a reserved port */
@@ -281,7 +284,9 @@ 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, int size, int max_req);
+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 *);
 
 static inline __be32 *xprt_skip_transport_header(struct rpc_xprt *xprt, __be32 *p)