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authorTrond Myklebust <Trond.Myklebust@netapp.com>2011-07-17 18:11:30 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-07-17 18:11:30 -0400
commitd9ba131d8f58c0d2ff5029e7002ab43f913b36f9 (patch)
treef2ed7330c72077bf84954b989cbe1ff47522a115 /net/sunrpc/xprtsock.c
parent21de0a955f3af29fa1100d96f66e6adade89e77a (diff)
SUNRPC: Support dynamic slot allocation for TCP connections
Allow the number of available slots to grow with the TCP window size. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/xprtsock.c')
-rw-r--r--net/sunrpc/xprtsock.c49
1 files changed, 42 insertions, 7 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index adaa54c6a09a..d7f97ef26590 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -54,7 +54,8 @@ static void xs_close(struct rpc_xprt *xprt);
* xprtsock tunables
*/
unsigned int xprt_udp_slot_table_entries = RPC_DEF_SLOT_TABLE;
-unsigned int xprt_tcp_slot_table_entries = RPC_DEF_SLOT_TABLE;
+unsigned int xprt_tcp_slot_table_entries = RPC_MIN_SLOT_TABLE;
+unsigned int xprt_max_tcp_slot_table_entries = RPC_MAX_SLOT_TABLE;
unsigned int xprt_min_resvport = RPC_DEF_MIN_RESVPORT;
unsigned int xprt_max_resvport = RPC_DEF_MAX_RESVPORT;
@@ -75,6 +76,7 @@ static unsigned int xs_tcp_fin_timeout __read_mostly = XS_TCP_LINGER_TO;
static unsigned int min_slot_table_size = RPC_MIN_SLOT_TABLE;
static unsigned int max_slot_table_size = RPC_MAX_SLOT_TABLE;
+static unsigned int max_tcp_slot_table_limit = RPC_MAX_SLOT_TABLE_LIMIT;
static unsigned int xprt_min_resvport_limit = RPC_MIN_RESVPORT;
static unsigned int xprt_max_resvport_limit = RPC_MAX_RESVPORT;
@@ -104,6 +106,15 @@ static ctl_table xs_tunables_table[] = {
.extra2 = &max_slot_table_size
},
{
+ .procname = "tcp_max_slot_table_entries",
+ .data = &xprt_max_tcp_slot_table_entries,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_slot_table_size,
+ .extra2 = &max_tcp_slot_table_limit
+ },
+ {
.procname = "min_resvport",
.data = &xprt_min_resvport,
.maxlen = sizeof(unsigned int),
@@ -2491,7 +2502,8 @@ static int xs_init_anyaddr(const int family, struct sockaddr *sap)
}
static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args,
- unsigned int slot_table_size)
+ unsigned int slot_table_size,
+ unsigned int max_slot_table_size)
{
struct rpc_xprt *xprt;
struct sock_xprt *new;
@@ -2501,7 +2513,8 @@ static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args,
return ERR_PTR(-EBADF);
}
- xprt = xprt_alloc(args->net, sizeof(*new), slot_table_size);
+ xprt = xprt_alloc(args->net, sizeof(*new), slot_table_size,
+ max_slot_table_size);
if (xprt == NULL) {
dprintk("RPC: xs_setup_xprt: couldn't allocate "
"rpc_xprt\n");
@@ -2543,7 +2556,8 @@ static struct rpc_xprt *xs_setup_local(struct xprt_create *args)
struct rpc_xprt *xprt;
struct rpc_xprt *ret;
- xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries);
+ xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries,
+ xprt_max_tcp_slot_table_entries);
if (IS_ERR(xprt))
return xprt;
transport = container_of(xprt, struct sock_xprt, xprt);
@@ -2607,7 +2621,8 @@ static struct rpc_xprt *xs_setup_udp(struct xprt_create *args)
struct sock_xprt *transport;
struct rpc_xprt *ret;
- xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries);
+ xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries,
+ xprt_udp_slot_table_entries);
if (IS_ERR(xprt))
return xprt;
transport = container_of(xprt, struct sock_xprt, xprt);
@@ -2683,7 +2698,8 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
struct sock_xprt *transport;
struct rpc_xprt *ret;
- xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries);
+ xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries,
+ xprt_max_tcp_slot_table_entries);
if (IS_ERR(xprt))
return xprt;
transport = container_of(xprt, struct sock_xprt, xprt);
@@ -2762,7 +2778,8 @@ static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args)
*/
return args->bc_xprt->xpt_bc_xprt;
}
- xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries);
+ xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries,
+ xprt_tcp_slot_table_entries);
if (IS_ERR(xprt))
return xprt;
transport = container_of(xprt, struct sock_xprt, xprt);
@@ -2949,8 +2966,26 @@ static struct kernel_param_ops param_ops_slot_table_size = {
#define param_check_slot_table_size(name, p) \
__param_check(name, p, unsigned int);
+static int param_set_max_slot_table_size(const char *val,
+ const struct kernel_param *kp)
+{
+ return param_set_uint_minmax(val, kp,
+ RPC_MIN_SLOT_TABLE,
+ RPC_MAX_SLOT_TABLE_LIMIT);
+}
+
+static struct kernel_param_ops param_ops_max_slot_table_size = {
+ .set = param_set_max_slot_table_size,
+ .get = param_get_uint,
+};
+
+#define param_check_max_slot_table_size(name, p) \
+ __param_check(name, p, unsigned int);
+
module_param_named(tcp_slot_table_entries, xprt_tcp_slot_table_entries,
slot_table_size, 0644);
+module_param_named(tcp_max_slot_table_entries, xprt_max_tcp_slot_table_entries,
+ max_slot_table_size, 0644);
module_param_named(udp_slot_table_entries, xprt_udp_slot_table_entries,
slot_table_size, 0644);