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Merge branch 'devel' into for-linus

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This commit is contained in:
Trond Myklebust 2009-04-01 13:28:15 -04:00
commit cc85906110
39 changed files with 1178 additions and 845 deletions
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22
net/sunrpc/Kconfig
View file

@ -17,28 +17,6 @@ config SUNRPC_XPRT_RDMA
If unsure, say N.
config SUNRPC_REGISTER_V4
bool "Register local RPC services via rpcbind v4 (EXPERIMENTAL)"
depends on SUNRPC && EXPERIMENTAL
default n
help
Sun added support for registering RPC services at an IPv6
address by creating two new versions of the rpcbind protocol
(RFC 1833).
This option enables support in the kernel RPC server for
registering kernel RPC services via version 4 of the rpcbind
protocol. If you enable this option, you must run a portmapper
daemon that supports rpcbind protocol version 4.
Serving NFS over IPv6 from knfsd (the kernel's NFS server)
requires that you enable this option and use a portmapper that
supports rpcbind version 4.
If unsure, say N to get traditional behavior (register kernel
RPC services using only rpcbind version 2). Distributions
using the legacy Linux portmapper daemon must say N here.
config RPCSEC_GSS_KRB5
tristate "Secure RPC: Kerberos V mechanism (EXPERIMENTAL)"
depends on SUNRPC && EXPERIMENTAL

48
net/sunrpc/clnt.c
View file

@ -1032,27 +1032,20 @@ call_connect_status(struct rpc_task *task)
dprint_status(task);
task->tk_status = 0;
if (status >= 0) {
if (status >= 0 || status == -EAGAIN) {
clnt->cl_stats->netreconn++;
task->tk_action = call_transmit;
return;
}
/* Something failed: remote service port may have changed */
rpc_force_rebind(clnt);
switch (status) {
case -ENOTCONN:
case -EAGAIN:
task->tk_action = call_bind;
if (!RPC_IS_SOFT(task))
return;
/* if soft mounted, test if we've timed out */
case -ETIMEDOUT:
task->tk_action = call_timeout;
return;
break;
default:
rpc_exit(task, -EIO);
}
rpc_exit(task, -EIO);
}
/*
@ -1105,14 +1098,26 @@ static void
call_transmit_status(struct rpc_task *task)
{
task->tk_action = call_status;
/*
* Special case: if we've been waiting on the socket's write_space()
* callback, then don't call xprt_end_transmit().
*/
if (task->tk_status == -EAGAIN)
return;
xprt_end_transmit(task);
rpc_task_force_reencode(task);
switch (task->tk_status) {
case -EAGAIN:
break;
default:
xprt_end_transmit(task);
/*
* Special cases: if we've been waiting on the
* socket's write_space() callback, or if the
* socket just returned a connection error,
* then hold onto the transport lock.
*/
case -ECONNREFUSED:
case -ECONNRESET:
case -ENOTCONN:
case -EHOSTDOWN:
case -EHOSTUNREACH:
case -ENETUNREACH:
case -EPIPE:
rpc_task_force_reencode(task);
}
}
/*
@ -1152,9 +1157,12 @@ call_status(struct rpc_task *task)
xprt_conditional_disconnect(task->tk_xprt,
req->rq_connect_cookie);
break;
case -ECONNRESET:
case -ECONNREFUSED:
case -ENOTCONN:
rpc_force_rebind(clnt);
rpc_delay(task, 3*HZ);
case -EPIPE:
case -ENOTCONN:
task->tk_action = call_bind;
break;
case -EAGAIN:

103
net/sunrpc/rpcb_clnt.c
View file

@ -63,9 +63,16 @@ enum {
* r_owner
*
* The "owner" is allowed to unset a service in the rpcbind database.
* We always use the following (arbitrary) fixed string.
*
* For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a
* UID which it maps to a local user name via a password lookup.
* In all other cases it is ignored.
*
* For SET/UNSET requests, user space provides a value, even for
* network requests, and GETADDR uses an empty string. We follow
* those precedents here.
*/
#define RPCB_OWNER_STRING "rpcb"
#define RPCB_OWNER_STRING "0"
#define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
static void rpcb_getport_done(struct rpc_task *, void *);
@ -124,12 +131,6 @@ static const struct sockaddr_in rpcb_inaddr_loopback = {
.sin_port = htons(RPCBIND_PORT),
};
static const struct sockaddr_in6 rpcb_in6addr_loopback = {
.sin6_family = AF_INET6,
.sin6_addr = IN6ADDR_LOOPBACK_INIT,
.sin6_port = htons(RPCBIND_PORT),
};
static struct rpc_clnt *rpcb_create_local(struct sockaddr *addr,
size_t addrlen, u32 version)
{
@ -176,9 +177,10 @@ static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
return rpc_create(&args);
}
static int rpcb_register_call(struct sockaddr *addr, size_t addrlen,
u32 version, struct rpc_message *msg)
static int rpcb_register_call(const u32 version, struct rpc_message *msg)
{
struct sockaddr *addr = (struct sockaddr *)&rpcb_inaddr_loopback;
size_t addrlen = sizeof(rpcb_inaddr_loopback);
struct rpc_clnt *rpcb_clnt;
int result, error = 0;
@ -192,7 +194,7 @@ static int rpcb_register_call(struct sockaddr *addr, size_t addrlen,
error = PTR_ERR(rpcb_clnt);
if (error < 0) {
printk(KERN_WARNING "RPC: failed to contact local rpcbind "
dprintk("RPC: failed to contact local rpcbind "
"server (errno %d).\n", -error);
return error;
}
@ -254,25 +256,23 @@ int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
if (port)
msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
return rpcb_register_call((struct sockaddr *)&rpcb_inaddr_loopback,
sizeof(rpcb_inaddr_loopback),
RPCBVERS_2, &msg);
return rpcb_register_call(RPCBVERS_2, &msg);
}
/*
* Fill in AF_INET family-specific arguments to register
*/
static int rpcb_register_netid4(struct sockaddr_in *address_to_register,
struct rpc_message *msg)
static int rpcb_register_inet4(const struct sockaddr *sap,
struct rpc_message *msg)
{
const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
struct rpcbind_args *map = msg->rpc_argp;
unsigned short port = ntohs(address_to_register->sin_port);
unsigned short port = ntohs(sin->sin_port);
char buf[32];
/* Construct AF_INET universal address */
snprintf(buf, sizeof(buf), "%pI4.%u.%u",
&address_to_register->sin_addr.s_addr,
port >> 8, port & 0xff);
&sin->sin_addr.s_addr, port >> 8, port & 0xff);
map->r_addr = buf;
dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
@ -284,29 +284,27 @@ static int rpcb_register_netid4(struct sockaddr_in *address_to_register,
if (port)
msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
return rpcb_register_call((struct sockaddr *)&rpcb_inaddr_loopback,
sizeof(rpcb_inaddr_loopback),
RPCBVERS_4, msg);
return rpcb_register_call(RPCBVERS_4, msg);
}
/*
* Fill in AF_INET6 family-specific arguments to register
*/
static int rpcb_register_netid6(struct sockaddr_in6 *address_to_register,
struct rpc_message *msg)
static int rpcb_register_inet6(const struct sockaddr *sap,
struct rpc_message *msg)
{
const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap;
struct rpcbind_args *map = msg->rpc_argp;
unsigned short port = ntohs(address_to_register->sin6_port);
unsigned short port = ntohs(sin6->sin6_port);
char buf[64];
/* Construct AF_INET6 universal address */
if (ipv6_addr_any(&address_to_register->sin6_addr))
if (ipv6_addr_any(&sin6->sin6_addr))
snprintf(buf, sizeof(buf), "::.%u.%u",
port >> 8, port & 0xff);
else
snprintf(buf, sizeof(buf), "%pI6.%u.%u",
&address_to_register->sin6_addr,
port >> 8, port & 0xff);
&sin6->sin6_addr, port >> 8, port & 0xff);
map->r_addr = buf;
dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
@ -318,9 +316,21 @@ static int rpcb_register_netid6(struct sockaddr_in6 *address_to_register,
if (port)
msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
return rpcb_register_call((struct sockaddr *)&rpcb_in6addr_loopback,
sizeof(rpcb_in6addr_loopback),
RPCBVERS_4, msg);
return rpcb_register_call(RPCBVERS_4, msg);
}
static int rpcb_unregister_all_protofamilies(struct rpc_message *msg)
{
struct rpcbind_args *map = msg->rpc_argp;
dprintk("RPC: unregistering [%u, %u, '%s'] with "
"local rpcbind\n",
map->r_prog, map->r_vers, map->r_netid);
map->r_addr = "";
msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
return rpcb_register_call(RPCBVERS_4, msg);
}
/**
@ -340,10 +350,11 @@ static int rpcb_register_netid6(struct sockaddr_in6 *address_to_register,
* invoke this function once for each [program, version, address,
* netid] tuple they wish to advertise.
*
* Callers may also unregister RPC services that are no longer
* available by setting the port number in the passed-in address
* to zero. Callers pass a netid of "" to unregister all
* transport netids associated with [program, version, address].
* Callers may also unregister RPC services that are registered at a
* specific address by setting the port number in @address to zero.
* They may unregister all registered protocol families at once for
* a service by passing a NULL @address argument. If @netid is ""
* then all netids for [program, version, address] are unregistered.
*
* This function uses rpcbind protocol version 4 to contact the
* local rpcbind daemon. The local rpcbind daemon must support
@ -378,13 +389,14 @@ int rpcb_v4_register(const u32 program, const u32 version,
.rpc_argp = &map,
};
if (address == NULL)
return rpcb_unregister_all_protofamilies(&msg);
switch (address->sa_family) {
case AF_INET:
return rpcb_register_netid4((struct sockaddr_in *)address,
&msg);
return rpcb_register_inet4(address, &msg);
case AF_INET6:
return rpcb_register_netid6((struct sockaddr_in6 *)address,
&msg);
return rpcb_register_inet6(address, &msg);
}
return -EAFNOSUPPORT;
@ -579,7 +591,7 @@ void rpcb_getport_async(struct rpc_task *task)
map->r_xprt = xprt_get(xprt);
map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
map->r_addr = rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR);
map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */
map->r_owner = "";
map->r_status = -EIO;
child = rpcb_call_async(rpcb_clnt, map, proc);
@ -703,11 +715,16 @@ static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
*portp = 0;
addr_len = ntohl(*p++);
if (addr_len == 0) {
dprintk("RPC: rpcb_decode_getaddr: "
"service is not registered\n");
return 0;
}
/*
* Simple sanity check. The smallest possible universal
* address is an IPv4 address string containing 11 bytes.
* Simple sanity check.
*/
if (addr_len < 11 || addr_len > RPCBIND_MAXUADDRLEN)
if (addr_len > RPCBIND_MAXUADDRLEN)
goto out_err;
/*

162
net/sunrpc/svc.c
View file

@ -359,7 +359,7 @@ svc_pool_for_cpu(struct svc_serv *serv, int cpu)
*/
static struct svc_serv *
__svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
sa_family_t family, void (*shutdown)(struct svc_serv *serv))
void (*shutdown)(struct svc_serv *serv))
{
struct svc_serv *serv;
unsigned int vers;
@ -368,7 +368,6 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
if (!(serv = kzalloc(sizeof(*serv), GFP_KERNEL)))
return NULL;
serv->sv_family = family;
serv->sv_name = prog->pg_name;
serv->sv_program = prog;
serv->sv_nrthreads = 1;
@ -427,21 +426,21 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
struct svc_serv *
svc_create(struct svc_program *prog, unsigned int bufsize,
sa_family_t family, void (*shutdown)(struct svc_serv *serv))
void (*shutdown)(struct svc_serv *serv))
{
return __svc_create(prog, bufsize, /*npools*/1, family, shutdown);
return __svc_create(prog, bufsize, /*npools*/1, shutdown);
}
EXPORT_SYMBOL_GPL(svc_create);
struct svc_serv *
svc_create_pooled(struct svc_program *prog, unsigned int bufsize,
sa_family_t family, void (*shutdown)(struct svc_serv *serv),
void (*shutdown)(struct svc_serv *serv),
svc_thread_fn func, struct module *mod)
{
struct svc_serv *serv;
unsigned int npools = svc_pool_map_get();
serv = __svc_create(prog, bufsize, npools, family, shutdown);
serv = __svc_create(prog, bufsize, npools, shutdown);
if (serv != NULL) {
serv->sv_function = func;
@ -719,8 +718,6 @@ svc_exit_thread(struct svc_rqst *rqstp)
}
EXPORT_SYMBOL_GPL(svc_exit_thread);
#ifdef CONFIG_SUNRPC_REGISTER_V4
/*
* Register an "inet" protocol family netid with the local
* rpcbind daemon via an rpcbind v4 SET request.
@ -735,12 +732,13 @@ static int __svc_rpcb_register4(const u32 program, const u32 version,
const unsigned short protocol,
const unsigned short port)
{
struct sockaddr_in sin = {
const struct sockaddr_in sin = {
.sin_family = AF_INET,
.sin_addr.s_addr = htonl(INADDR_ANY),
.sin_port = htons(port),
};
char *netid;
const char *netid;
int error;
switch (protocol) {
case IPPROTO_UDP:
@ -750,13 +748,23 @@ static int __svc_rpcb_register4(const u32 program, const u32 version,
netid = RPCBIND_NETID_TCP;
break;
default:
return -EPROTONOSUPPORT;
return -ENOPROTOOPT;
}
return rpcb_v4_register(program, version,
(struct sockaddr *)&sin, netid);
error = rpcb_v4_register(program, version,
(const struct sockaddr *)&sin, netid);
/*
* User space didn't support rpcbind v4, so retry this
* registration request with the legacy rpcbind v2 protocol.
*/
if (error == -EPROTONOSUPPORT)
error = rpcb_register(program, version, protocol, port);
return error;
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
/*
* Register an "inet6" protocol family netid with the local
* rpcbind daemon via an rpcbind v4 SET request.
@ -771,12 +779,13 @@ static int __svc_rpcb_register6(const u32 program, const u32 version,
const unsigned short protocol,
const unsigned short port)
{
struct sockaddr_in6 sin6 = {
const struct sockaddr_in6 sin6 = {
.sin6_family = AF_INET6,
.sin6_addr = IN6ADDR_ANY_INIT,
.sin6_port = htons(port),
};
char *netid;
const char *netid;
int error;
switch (protocol) {
case IPPROTO_UDP:
@ -786,12 +795,22 @@ static int __svc_rpcb_register6(const u32 program, const u32 version,
netid = RPCBIND_NETID_TCP6;
break;
default:
return -EPROTONOSUPPORT;
return -ENOPROTOOPT;
}
return rpcb_v4_register(program, version,
(struct sockaddr *)&sin6, netid);
error = rpcb_v4_register(program, version,
(const struct sockaddr *)&sin6, netid);
/*
* User space didn't support rpcbind version 4, so we won't
* use a PF_INET6 listener.
*/
if (error == -EPROTONOSUPPORT)
error = -EAFNOSUPPORT;
return error;
}
#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
/*
* Register a kernel RPC service via rpcbind version 4.
@ -799,69 +818,43 @@ static int __svc_rpcb_register6(const u32 program, const u32 version,
* Returns zero on success; a negative errno value is returned
* if any error occurs.
*/
static int __svc_register(const u32 program, const u32 version,
const sa_family_t family,
static int __svc_register(const char *progname,
const u32 program, const u32 version,
const int family,
const unsigned short protocol,
const unsigned short port)
{
int error;
int error = -EAFNOSUPPORT;
switch (family) {
case AF_INET:
return __svc_rpcb_register4(program, version,
case PF_INET:
error = __svc_rpcb_register4(program, version,
protocol, port);
case AF_INET6:
break;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case PF_INET6:
error = __svc_rpcb_register6(program, version,
protocol, port);
if (error < 0)
return error;
/*
* Work around bug in some versions of Linux rpcbind
* which don't allow registration of both inet and
* inet6 netids.
*
* Error return ignored for now.
*/
__svc_rpcb_register4(program, version,
protocol, port);
return 0;
#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
}
return -EAFNOSUPPORT;
if (error < 0)
printk(KERN_WARNING "svc: failed to register %sv%u RPC "
"service (errno %d).\n", progname, version, -error);
return error;
}
#else /* CONFIG_SUNRPC_REGISTER_V4 */
/*
* Register a kernel RPC service via rpcbind version 2.
*
* Returns zero on success; a negative errno value is returned
* if any error occurs.
*/
static int __svc_register(const u32 program, const u32 version,
sa_family_t family,
const unsigned short protocol,
const unsigned short port)
{
if (family != AF_INET)
return -EAFNOSUPPORT;
return rpcb_register(program, version, protocol, port);
}
#endif /* CONFIG_SUNRPC_REGISTER_V4 */
/**
* svc_register - register an RPC service with the local portmapper
* @serv: svc_serv struct for the service to register
* @family: protocol family of service's listener socket
* @proto: transport protocol number to advertise
* @port: port to advertise
*
* Service is registered for any address in serv's address family
* Service is registered for any address in the passed-in protocol family
*/
int svc_register(const struct svc_serv *serv, const unsigned short proto,
const unsigned short port)
int svc_register(const struct svc_serv *serv, const int family,
const unsigned short proto, const unsigned short port)
{
struct svc_program *progp;
unsigned int i;
@ -879,15 +872,15 @@ int svc_register(const struct svc_serv *serv, const unsigned short proto,
i,
proto == IPPROTO_UDP? "udp" : "tcp",
port,
serv->sv_family,
family,
progp->pg_vers[i]->vs_hidden?
" (but not telling portmap)" : "");
if (progp->pg_vers[i]->vs_hidden)
continue;
error = __svc_register(progp->pg_prog, i,
serv->sv_family, proto, port);
error = __svc_register(progp->pg_name, progp->pg_prog,
i, family, proto, port);
if (error < 0)
break;
}
@ -896,38 +889,31 @@ int svc_register(const struct svc_serv *serv, const unsigned short proto,
return error;
}
#ifdef CONFIG_SUNRPC_REGISTER_V4
static void __svc_unregister(const u32 program, const u32 version,
const char *progname)
{
struct sockaddr_in6 sin6 = {
.sin6_family = AF_INET6,
.sin6_addr = IN6ADDR_ANY_INIT,
.sin6_port = 0,
};
int error;
error = rpcb_v4_register(program, version,
(struct sockaddr *)&sin6, "");
dprintk("svc: %s(%sv%u), error %d\n",
__func__, progname, version, error);
}
#else /* CONFIG_SUNRPC_REGISTER_V4 */
/*
* If user space is running rpcbind, it should take the v4 UNSET
* and clear everything for this [program, version]. If user space
* is running portmap, it will reject the v4 UNSET, but won't have
* any "inet6" entries anyway. So a PMAP_UNSET should be sufficient
* in this case to clear all existing entries for [program, version].
*/
static void __svc_unregister(const u32 program, const u32 version,
const char *progname)
{
int error;
error = rpcb_register(program, version, 0, 0);
error = rpcb_v4_register(program, version, NULL, "");
/*
* User space didn't support rpcbind v4, so retry this
* request with the legacy rpcbind v2 protocol.
*/
if (error == -EPROTONOSUPPORT)
error = rpcb_register(program, version, 0, 0);
dprintk("svc: %s(%sv%u), error %d\n",
__func__, progname, version, error);
}
#endif /* CONFIG_SUNRPC_REGISTER_V4 */
/*
* All netids, bind addresses and ports registered for [program, version]
* are removed from the local rpcbind database (if the service is not

31
net/sunrpc/svc_xprt.c
View file

@ -161,7 +161,9 @@ EXPORT_SYMBOL_GPL(svc_xprt_init);
static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
struct svc_serv *serv,
unsigned short port, int flags)
const int family,
const unsigned short port,
int flags)
{
struct sockaddr_in sin = {
.sin_family = AF_INET,
@ -176,12 +178,12 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
struct sockaddr *sap;
size_t len;
switch (serv->sv_family) {
case AF_INET:
switch (family) {
case PF_INET:
sap = (struct sockaddr *)&sin;
len = sizeof(sin);
break;
case AF_INET6:
case PF_INET6:
sap = (struct sockaddr *)&sin6;
len = sizeof(sin6);
break;
@ -192,7 +194,8 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
return xcl->xcl_ops->xpo_create(serv, sap, len, flags);
}
int svc_create_xprt(struct svc_serv *serv, char *xprt_name, unsigned short port,
int svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
const int family, const unsigned short port,
int flags)
{
struct svc_xprt_class *xcl;
@ -209,7 +212,7 @@ int svc_create_xprt(struct svc_serv *serv, char *xprt_name, unsigned short port,
goto err;
spin_unlock(&svc_xprt_class_lock);
newxprt = __svc_xpo_create(xcl, serv, port, flags);
newxprt = __svc_xpo_create(xcl, serv, family, port, flags);
if (IS_ERR(newxprt)) {
module_put(xcl->xcl_owner);
return PTR_ERR(newxprt);
@ -1033,7 +1036,13 @@ static struct svc_deferred_req *svc_deferred_dequeue(struct svc_xprt *xprt)
return dr;
}
/*
/**
* svc_find_xprt - find an RPC transport instance
* @serv: pointer to svc_serv to search
* @xcl_name: C string containing transport's class name
* @af: Address family of transport's local address
* @port: transport's IP port number
*
* Return the transport instance pointer for the endpoint accepting
* connections/peer traffic from the specified transport class,
* address family and port.
@ -1042,14 +1051,14 @@ static struct svc_deferred_req *svc_deferred_dequeue(struct svc_xprt *xprt)
* wild-card, and will result in matching the first transport in the
* service's list that has a matching class name.
*/
struct svc_xprt *svc_find_xprt(struct svc_serv *serv, char *xcl_name,
int af, int port)
struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
const sa_family_t af, const unsigned short port)
{
struct svc_xprt *xprt;
struct svc_xprt *found = NULL;
/* Sanity check the args */
if (!serv || !xcl_name)
if (serv == NULL || xcl_name == NULL)
return found;
spin_lock_bh(&serv->sv_lock);
@ -1058,7 +1067,7 @@ struct svc_xprt *svc_find_xprt(struct svc_serv *serv, char *xcl_name,
continue;
if (af != AF_UNSPEC && af != xprt->xpt_local.ss_family)
continue;
if (port && port != svc_xprt_local_port(xprt))
if (port != 0 && port != svc_xprt_local_port(xprt))
continue;
found = xprt;
svc_xprt_get(xprt);

42
net/sunrpc/svcsock.c
View file

@ -1110,7 +1110,6 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
struct svc_sock *svsk;
struct sock *inet;
int pmap_register = !(flags & SVC_SOCK_ANONYMOUS);
int val;
dprintk("svc: svc_setup_socket %p\n", sock);
if (!(svsk = kzalloc(sizeof(*svsk), GFP_KERNEL))) {
@ -1122,7 +1121,7 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
/* Register socket with portmapper */
if (*errp >= 0 && pmap_register)
*errp = svc_register(serv, inet->sk_protocol,
*errp = svc_register(serv, inet->sk_family, inet->sk_protocol,
ntohs(inet_sk(inet)->sport));
if (*errp < 0) {
@ -1143,18 +1142,6 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
else
svc_tcp_init(svsk, serv);
/*
* We start one listener per sv_serv. We want AF_INET
* requests to be automatically shunted to our AF_INET6
* listener using a mapped IPv4 address. Make sure
* no-one starts an equivalent IPv4 listener, which
* would steal our incoming connections.
*/
val = 0;
if (serv->sv_family == AF_INET6)
kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY,
(char *)&val, sizeof(val));
dprintk("svc: svc_setup_socket created %p (inet %p)\n",
svsk, svsk->sk_sk);
@ -1222,6 +1209,8 @@ static struct svc_xprt *svc_create_socket(struct svc_serv *serv,
struct sockaddr_storage addr;
struct sockaddr *newsin = (struct sockaddr *)&addr;
int newlen;
int family;
int val;
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
dprintk("svc: svc_create_socket(%s, %d, %s)\n",
@ -1233,14 +1222,35 @@ static struct svc_xprt *svc_create_socket(struct svc_serv *serv,
"sockets supported\n");
return ERR_PTR(-EINVAL);
}
type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM;
error = sock_create_kern(sin->sa_family, type, protocol, &sock);
type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM;
switch (sin->sa_family) {
case AF_INET6:
family = PF_INET6;
break;
case AF_INET:
family = PF_INET;
break;
default:
return ERR_PTR(-EINVAL);
}
error = sock_create_kern(family, type, protocol, &sock);
if (error < 0)
return ERR_PTR(error);
svc_reclassify_socket(sock);
/*
* If this is an PF_INET6 listener, we want to avoid
* getting requests from IPv4 remotes. Those should
* be shunted to a PF_INET listener via rpcbind.
*/
val = 1;
if (family == PF_INET6)
kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY,
(char *)&val, sizeof(val));
if (type == SOCK_STREAM)
sock->sk->sk_reuse = 1; /* allow address reuse */
error = kernel_bind(sock, sin, len);

91
net/sunrpc/xprt.c
View file

@ -151,6 +151,37 @@ out:
}
EXPORT_SYMBOL_GPL(xprt_unregister_transport);
/**
* xprt_load_transport - load a transport implementation
* @transport_name: transport to load
*
* Returns:
* 0: transport successfully loaded
* -ENOENT: transport module not available
*/
int xprt_load_transport(const char *transport_name)
{
struct xprt_class *t;
char module_name[sizeof t->name + 5];
int result;
result = 0;
spin_lock(&xprt_list_lock);
list_for_each_entry(t, &xprt_list, list) {
if (strcmp(t->name, transport_name) == 0) {
spin_unlock(&xprt_list_lock);
goto out;
}
}
spin_unlock(&xprt_list_lock);
strcpy(module_name, "xprt");
strncat(module_name, transport_name, sizeof t->name);
result = request_module(module_name);
out:
return result;
}
EXPORT_SYMBOL_GPL(xprt_load_transport);
/**
* xprt_reserve_xprt - serialize write access to transports
* @task: task that is requesting access to the transport
@ -580,7 +611,7 @@ void xprt_disconnect_done(struct rpc_xprt *xprt)
dprintk("RPC: disconnected transport %p\n", xprt);
spin_lock_bh(&xprt->transport_lock);
xprt_clear_connected(xprt);
xprt_wake_pending_tasks(xprt, -ENOTCONN);
xprt_wake_pending_tasks(xprt, -EAGAIN);
spin_unlock_bh(&xprt->transport_lock);
}
EXPORT_SYMBOL_GPL(xprt_disconnect_done);
@ -598,7 +629,7 @@ void xprt_force_disconnect(struct rpc_xprt *xprt)
/* Try to schedule an autoclose RPC call */
if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0)
queue_work(rpciod_workqueue, &xprt->task_cleanup);
xprt_wake_pending_tasks(xprt, -ENOTCONN);
xprt_wake_pending_tasks(xprt, -EAGAIN);
spin_unlock_bh(&xprt->transport_lock);
}
@ -625,7 +656,7 @@ void xprt_conditional_disconnect(struct rpc_xprt *xprt, unsigned int cookie)
/* Try to schedule an autoclose RPC call */
if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0)
queue_work(rpciod_workqueue, &xprt->task_cleanup);
xprt_wake_pending_tasks(xprt, -ENOTCONN);
xprt_wake_pending_tasks(xprt, -EAGAIN);
out:
spin_unlock_bh(&xprt->transport_lock);
}
@ -695,9 +726,8 @@ static void xprt_connect_status(struct rpc_task *task)
}
switch (task->tk_status) {
case -ENOTCONN:
dprintk("RPC: %5u xprt_connect_status: connection broken\n",
task->tk_pid);
case -EAGAIN:
dprintk("RPC: %5u xprt_connect_status: retrying\n", task->tk_pid);
break;
case -ETIMEDOUT:
dprintk("RPC: %5u xprt_connect_status: connect attempt timed "
@ -818,15 +848,8 @@ int xprt_prepare_transmit(struct rpc_task *task)
err = req->rq_received;
goto out_unlock;
}
if (!xprt->ops->reserve_xprt(task)) {
if (!xprt->ops->reserve_xprt(task))
err = -EAGAIN;
goto out_unlock;
}
if (!xprt_connected(xprt)) {
err = -ENOTCONN;
goto out_unlock;
}
out_unlock:
spin_unlock_bh(&xprt->transport_lock);
return err;
@ -870,32 +893,26 @@ void xprt_transmit(struct rpc_task *task)
req->rq_connect_cookie = xprt->connect_cookie;
req->rq_xtime = jiffies;
status = xprt->ops->send_request(task);
if (status == 0) {
dprintk("RPC: %5u xmit complete\n", task->tk_pid);
spin_lock_bh(&xprt->transport_lock);
xprt->ops->set_retrans_timeout(task);
xprt->stat.sends++;
xprt->stat.req_u += xprt->stat.sends - xprt->stat.recvs;
xprt->stat.bklog_u += xprt->backlog.qlen;
/* Don't race with disconnect */
if (!xprt_connected(xprt))
task->tk_status = -ENOTCONN;
else if (!req->rq_received)
rpc_sleep_on(&xprt->pending, task, xprt_timer);
spin_unlock_bh(&xprt->transport_lock);
if (status != 0) {
task->tk_status = status;
return;
}
/* Note: at this point, task->tk_sleeping has not yet been set,
* hence there is no danger of the waking up task being put on
* schedq, and being picked up by a parallel run of rpciod().
*/
task->tk_status = status;
if (status == -ECONNREFUSED)
rpc_sleep_on(&xprt->sending, task, NULL);
dprintk("RPC: %5u xmit complete\n", task->tk_pid);
spin_lock_bh(&xprt->transport_lock);
xprt->ops->set_retrans_timeout(task);
xprt->stat.sends++;
xprt->stat.req_u += xprt->stat.sends - xprt->stat.recvs;
xprt->stat.bklog_u += xprt->backlog.qlen;
/* Don't race with disconnect */
if (!xprt_connected(xprt))
task->tk_status = -ENOTCONN;
else if (!req->rq_received)
rpc_sleep_on(&xprt->pending, task, xprt_timer);
spin_unlock_bh(&xprt->transport_lock);
}
static inline void do_xprt_reserve(struct rpc_task *task)

26
net/sunrpc/xprtrdma/rpc_rdma.c
View file

@ -310,6 +310,19 @@ rpcrdma_inline_pullup(struct rpc_rqst *rqst, int pad)
__func__, pad, destp, rqst->rq_slen, curlen);
copy_len = rqst->rq_snd_buf.page_len;
if (rqst->rq_snd_buf.tail[0].iov_len) {
curlen = rqst->rq_snd_buf.tail[0].iov_len;
if (destp + copy_len != rqst->rq_snd_buf.tail[0].iov_base) {
memmove(destp + copy_len,
rqst->rq_snd_buf.tail[0].iov_base, curlen);
r_xprt->rx_stats.pullup_copy_count += curlen;
}
dprintk("RPC: %s: tail destp 0x%p len %d\n",
__func__, destp + copy_len, curlen);
rqst->rq_svec[0].iov_len += curlen;
}
r_xprt->rx_stats.pullup_copy_count += copy_len;
npages = PAGE_ALIGN(rqst->rq_snd_buf.page_base+copy_len) >> PAGE_SHIFT;
for (i = 0; copy_len && i < npages; i++) {
@ -332,17 +345,6 @@ rpcrdma_inline_pullup(struct rpc_rqst *rqst, int pad)
destp += curlen;
copy_len -= curlen;
}
if (rqst->rq_snd_buf.tail[0].iov_len) {
curlen = rqst->rq_snd_buf.tail[0].iov_len;
if (destp != rqst->rq_snd_buf.tail[0].iov_base) {
memcpy(destp,
rqst->rq_snd_buf.tail[0].iov_base, curlen);
r_xprt->rx_stats.pullup_copy_count += curlen;
}
dprintk("RPC: %s: tail destp 0x%p len %d curlen %d\n",
__func__, destp, copy_len, curlen);
rqst->rq_svec[0].iov_len += curlen;
}
/* header now contains entire send message */
return pad;
}
@ -656,7 +658,7 @@ rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len, int pad)
if (curlen > rqst->rq_rcv_buf.tail[0].iov_len)
curlen = rqst->rq_rcv_buf.tail[0].iov_len;
if (rqst->rq_rcv_buf.tail[0].iov_base != srcp)
memcpy(rqst->rq_rcv_buf.tail[0].iov_base, srcp, curlen);
memmove(rqst->rq_rcv_buf.tail[0].iov_base, srcp, curlen);
dprintk("RPC: %s: tail srcp 0x%p len %d curlen %d\n",
__func__, srcp, copy_len, curlen);
rqst->rq_rcv_buf.tail[0].iov_len = curlen;

8
net/sunrpc/xprtrdma/svc_rdma_sendto.c
View file

@ -191,7 +191,6 @@ static int map_xdr(struct svcxprt_rdma *xprt,
struct xdr_buf *xdr,
struct svc_rdma_req_map *vec)
{
int sge_max = (xdr->len+PAGE_SIZE-1) / PAGE_SIZE + 3;
int sge_no;
u32 sge_bytes;
u32 page_bytes;
@ -235,7 +234,11 @@ static int map_xdr(struct svcxprt_rdma *xprt,
sge_no++;
}
BUG_ON(sge_no > sge_max);
dprintk("svcrdma: map_xdr: sge_no %d page_no %d "
"page_base %u page_len %u head_len %zu tail_len %zu\n",
sge_no, page_no, xdr->page_base, xdr->page_len,
xdr->head[0].iov_len, xdr->tail[0].iov_len);
vec->count = sge_no;
return 0;
}
@ -579,7 +582,6 @@ static int send_reply(struct svcxprt_rdma *rdma,
ctxt->sge[page_no+1].length = 0;
}
BUG_ON(sge_no > rdma->sc_max_sge);
BUG_ON(sge_no > ctxt->count);
memset(&send_wr, 0, sizeof send_wr);
ctxt->wr_op = IB_WR_SEND;
send_wr.wr_id = (unsigned long)ctxt;

391
net/sunrpc/xprtsock.c
View file

@ -49,6 +49,9 @@ unsigned int xprt_tcp_slot_table_entries = RPC_DEF_SLOT_TABLE;
unsigned int xprt_min_resvport = RPC_DEF_MIN_RESVPORT;
unsigned int xprt_max_resvport = RPC_DEF_MAX_RESVPORT;
#define XS_TCP_LINGER_TO (15U * HZ)
static unsigned int xs_tcp_fin_timeout __read_mostly = XS_TCP_LINGER_TO;
/*
* We can register our own files under /proc/sys/sunrpc by
* calling register_sysctl_table() again. The files in that
@ -116,6 +119,14 @@ static ctl_table xs_tunables_table[] = {
.extra1 = &xprt_min_resvport_limit,
.extra2 = &xprt_max_resvport_limit
},
{
.procname = "tcp_fin_timeout",
.data = &xs_tcp_fin_timeout,
.maxlen = sizeof(xs_tcp_fin_timeout),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
.strategy = sysctl_jiffies
},
{
.ctl_name = 0,
},
@ -521,11 +532,12 @@ static void xs_nospace_callback(struct rpc_task *task)
* @task: task to put to sleep
*
*/
static void xs_nospace(struct rpc_task *task)
static int xs_nospace(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
struct rpc_xprt *xprt = req->rq_xprt;
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
int ret = 0;
dprintk("RPC: %5u xmit incomplete (%u left of %u)\n",
task->tk_pid, req->rq_slen - req->rq_bytes_sent,
@ -537,6 +549,7 @@ static void xs_nospace(struct rpc_task *task)
/* Don't race with disconnect */
if (xprt_connected(xprt)) {
if (test_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags)) {
ret = -EAGAIN;
/*
* Notify TCP that we're limited by the application
* window size
@ -548,10 +561,11 @@ static void xs_nospace(struct rpc_task *task)
}
} else {
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
task->tk_status = -ENOTCONN;
ret = -ENOTCONN;
}
spin_unlock_bh(&xprt->transport_lock);
return ret;
}
/**
@ -594,6 +608,8 @@ static int xs_udp_send_request(struct rpc_task *task)
/* Still some bytes left; set up for a retry later. */
status = -EAGAIN;
}
if (!transport->sock)
goto out;
switch (status) {
case -ENOTSOCK:
@ -601,21 +617,19 @@ static int xs_udp_send_request(struct rpc_task *task)
/* Should we call xs_close() here? */
break;
case -EAGAIN:
xs_nospace(task);
status = xs_nospace(task);
break;
default:
dprintk("RPC: sendmsg returned unrecognized error %d\n",
-status);
case -ENETUNREACH:
case -EPIPE:
case -ECONNREFUSED:
/* When the server has died, an ICMP port unreachable message
* prompts ECONNREFUSED. */
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
break;
default:
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
dprintk("RPC: sendmsg returned unrecognized error %d\n",
-status);
}
out:
return status;
}
@ -697,6 +711,8 @@ static int xs_tcp_send_request(struct rpc_task *task)
status = -EAGAIN;
break;
}
if (!transport->sock)
goto out;
switch (status) {
case -ENOTSOCK:
@ -704,23 +720,19 @@ static int xs_tcp_send_request(struct rpc_task *task)
/* Should we call xs_close() here? */
break;
case -EAGAIN:
xs_nospace(task);
break;
case -ECONNRESET:
xs_tcp_shutdown(xprt);
case -ECONNREFUSED:
case -ENOTCONN:
case -EPIPE:
status = -ENOTCONN;
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
status = xs_nospace(task);
break;
default:
dprintk("RPC: sendmsg returned unrecognized error %d\n",
-status);
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
case -ECONNRESET:
case -EPIPE:
xs_tcp_shutdown(xprt);
case -ECONNREFUSED:
case -ENOTCONN:
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
}
out:
return status;
}
@ -767,23 +779,13 @@ static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *s
sk->sk_error_report = transport->old_error_report;
}
/**
* xs_close - close a socket
* @xprt: transport
*
* This is used when all requests are complete; ie, no DRC state remains
* on the server we want to save.
*/
static void xs_close(struct rpc_xprt *xprt)
static void xs_reset_transport(struct sock_xprt *transport)
{
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
struct socket *sock = transport->sock;
struct sock *sk = transport->inet;
if (!sk)
goto clear_close_wait;
dprintk("RPC: xs_close xprt %p\n", xprt);
if (sk == NULL)
return;
write_lock_bh(&sk->sk_callback_lock);
transport->inet = NULL;
@ -797,8 +799,25 @@ static void xs_close(struct rpc_xprt *xprt)
sk->sk_no_check = 0;
sock_release(sock);
clear_close_wait:
}
/**
* xs_close - close a socket
* @xprt: transport
*
* This is used when all requests are complete; ie, no DRC state remains
* on the server we want to save.
*/
static void xs_close(struct rpc_xprt *xprt)
{
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
dprintk("RPC: xs_close xprt %p\n", xprt);
xs_reset_transport(transport);
smp_mb__before_clear_bit();
clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
clear_bit(XPRT_CLOSING, &xprt->state);
smp_mb__after_clear_bit();
@ -1126,6 +1145,47 @@ out:
read_unlock(&sk->sk_callback_lock);
}
/*
* Do the equivalent of linger/linger2 handling for dealing with
* broken servers that don't close the socket in a timely
* fashion
*/
static void xs_tcp_schedule_linger_timeout(struct rpc_xprt *xprt,
unsigned long timeout)
{
struct sock_xprt *transport;
if (xprt_test_and_set_connecting(xprt))
return;
set_bit(XPRT_CONNECTION_ABORT, &xprt->state);
transport = container_of(xprt, struct sock_xprt, xprt);
queue_delayed_work(rpciod_workqueue, &transport->connect_worker,
timeout);
}
static void xs_tcp_cancel_linger_timeout(struct rpc_xprt *xprt)
{
struct sock_xprt *transport;
transport = container_of(xprt, struct sock_xprt, xprt);
if (!test_bit(XPRT_CONNECTION_ABORT, &xprt->state) ||
!cancel_delayed_work(&transport->connect_worker))
return;
clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
xprt_clear_connecting(xprt);
}
static void xs_sock_mark_closed(struct rpc_xprt *xprt)
{
smp_mb__before_clear_bit();
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
clear_bit(XPRT_CLOSING, &xprt->state);
smp_mb__after_clear_bit();
/* Mark transport as closed and wake up all pending tasks */
xprt_disconnect_done(xprt);
}
/**
* xs_tcp_state_change - callback to handle TCP socket state changes
* @sk: socket whose state has changed
@ -1158,7 +1218,7 @@ static void xs_tcp_state_change(struct sock *sk)
transport->tcp_flags =
TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID;
xprt_wake_pending_tasks(xprt, 0);
xprt_wake_pending_tasks(xprt, -EAGAIN);
}
spin_unlock_bh(&xprt->transport_lock);
break;
@ -1171,10 +1231,10 @@ static void xs_tcp_state_change(struct sock *sk)
clear_bit(XPRT_CONNECTED, &xprt->state);
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
smp_mb__after_clear_bit();
xs_tcp_schedule_linger_timeout(xprt, xs_tcp_fin_timeout);
break;
case TCP_CLOSE_WAIT:
/* The server initiated a shutdown of the socket */
set_bit(XPRT_CLOSING, &xprt->state);
xprt_force_disconnect(xprt);
case TCP_SYN_SENT:
xprt->connect_cookie++;
@ -1187,40 +1247,35 @@ static void xs_tcp_state_change(struct sock *sk)
xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
break;
case TCP_LAST_ACK:
set_bit(XPRT_CLOSING, &xprt->state);
xs_tcp_schedule_linger_timeout(xprt, xs_tcp_fin_timeout);
smp_mb__before_clear_bit();
clear_bit(XPRT_CONNECTED, &xprt->state);
smp_mb__after_clear_bit();
break;
case TCP_CLOSE:
smp_mb__before_clear_bit();
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
clear_bit(XPRT_CLOSING, &xprt->state);
smp_mb__after_clear_bit();
/* Mark transport as closed and wake up all pending tasks */
xprt_disconnect_done(xprt);
xs_tcp_cancel_linger_timeout(xprt);
xs_sock_mark_closed(xprt);
}
out:
read_unlock(&sk->sk_callback_lock);
}
/**
* xs_tcp_error_report - callback mainly for catching RST events
* xs_error_report - callback mainly for catching socket errors
* @sk: socket
*/
static void xs_tcp_error_report(struct sock *sk)
static void xs_error_report(struct sock *sk)
{
struct rpc_xprt *xprt;
read_lock(&sk->sk_callback_lock);
if (sk->sk_err != ECONNRESET || sk->sk_state != TCP_ESTABLISHED)
goto out;
if (!(xprt = xprt_from_sock(sk)))
goto out;
dprintk("RPC: %s client %p...\n"
"RPC: error %d\n",
__func__, xprt, sk->sk_err);
xprt_force_disconnect(xprt);
xprt_wake_pending_tasks(xprt, -EAGAIN);
out:
read_unlock(&sk->sk_callback_lock);
}
@ -1494,6 +1549,7 @@ static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
sk->sk_user_data = xprt;
sk->sk_data_ready = xs_udp_data_ready;
sk->sk_write_space = xs_udp_write_space;
sk->sk_error_report = xs_error_report;
sk->sk_no_check = UDP_CSUM_NORCV;
sk->sk_allocation = GFP_ATOMIC;
@ -1526,9 +1582,10 @@ static void xs_udp_connect_worker4(struct work_struct *work)
goto out;
/* Start by resetting any existing state */
xs_close(xprt);
xs_reset_transport(transport);
if ((err = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock)) < 0) {
err = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock);
if (err < 0) {
dprintk("RPC: can't create UDP transport socket (%d).\n", -err);
goto out;
}
@ -1545,8 +1602,8 @@ static void xs_udp_connect_worker4(struct work_struct *work)
xs_udp_finish_connecting(xprt, sock);
status = 0;
out:
xprt_wake_pending_tasks(xprt, status);
xprt_clear_connecting(xprt);
xprt_wake_pending_tasks(xprt, status);
}
/**
@ -1567,9 +1624,10 @@ static void xs_udp_connect_worker6(struct work_struct *work)
goto out;
/* Start by resetting any existing state */
xs_close(xprt);
xs_reset_transport(transport);
if ((err = sock_create_kern(PF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock)) < 0) {
err = sock_create_kern(PF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock);
if (err < 0) {
dprintk("RPC: can't create UDP transport socket (%d).\n", -err);
goto out;
}
@ -1586,18 +1644,17 @@ static void xs_udp_connect_worker6(struct work_struct *work)
xs_udp_finish_connecting(xprt, sock);
status = 0;
out:
xprt_wake_pending_tasks(xprt, status);
xprt_clear_connecting(xprt);
xprt_wake_pending_tasks(xprt, status);
}
/*
* We need to preserve the port number so the reply cache on the server can
* find our cached RPC replies when we get around to reconnecting.
*/
static void xs_tcp_reuse_connection(struct rpc_xprt *xprt)
static void xs_abort_connection(struct rpc_xprt *xprt, struct sock_xprt *transport)
{
int result;
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
struct sockaddr any;
dprintk("RPC: disconnecting xprt %p to reuse port\n", xprt);
@ -1609,11 +1666,24 @@ static void xs_tcp_reuse_connection(struct rpc_xprt *xprt)
memset(&any, 0, sizeof(any));
any.sa_family = AF_UNSPEC;
result = kernel_connect(transport->sock, &any, sizeof(any), 0);
if (result)
if (!result)
xs_sock_mark_closed(xprt);
else
dprintk("RPC: AF_UNSPEC connect return code %d\n",
result);
}
static void xs_tcp_reuse_connection(struct rpc_xprt *xprt, struct sock_xprt *transport)
{
unsigned int state = transport->inet->sk_state;
if (state == TCP_CLOSE && transport->sock->state == SS_UNCONNECTED)
return;
if ((1 << state) & (TCPF_ESTABLISHED|TCPF_SYN_SENT))
return;
xs_abort_connection(xprt, transport);
}
static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
{
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
@ -1629,7 +1699,7 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
sk->sk_data_ready = xs_tcp_data_ready;
sk->sk_state_change = xs_tcp_state_change;
sk->sk_write_space = xs_tcp_write_space;
sk->sk_error_report = xs_tcp_error_report;
sk->sk_error_report = xs_error_report;
sk->sk_allocation = GFP_ATOMIC;
/* socket options */
@ -1656,6 +1726,97 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK);
}
/**
* xs_tcp_setup_socket - create a TCP socket and connect to a remote endpoint
* @xprt: RPC transport to connect
* @transport: socket transport to connect
* @create_sock: function to create a socket of the correct type
*
* Invoked by a work queue tasklet.
*/
static void xs_tcp_setup_socket(struct rpc_xprt *xprt,
struct sock_xprt *transport,
struct socket *(*create_sock)(struct rpc_xprt *,
struct sock_xprt *))
{
struct socket *sock = transport->sock;
int status = -EIO;
if (xprt->shutdown)
goto out;
if (!sock) {
clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
sock = create_sock(xprt, transport);
if (IS_ERR(sock)) {
status = PTR_ERR(sock);
goto out;
}
} else {
int abort_and_exit;
abort_and_exit = test_and_clear_bit(XPRT_CONNECTION_ABORT,
&xprt->state);
/* "close" the socket, preserving the local port */
xs_tcp_reuse_connection(xprt, transport);
if (abort_and_exit)
goto out_eagain;
}
dprintk("RPC: worker connecting xprt %p to address: %s\n",
xprt, xprt->address_strings[RPC_DISPLAY_ALL]);
status = xs_tcp_finish_connecting(xprt, sock);
dprintk("RPC: %p connect status %d connected %d sock state %d\n",
xprt, -status, xprt_connected(xprt),
sock->sk->sk_state);
switch (status) {
case -ECONNREFUSED:
case -ECONNRESET:
case -ENETUNREACH:
/* retry with existing socket, after a delay */
case 0:
case -EINPROGRESS:
case -EALREADY:
xprt_clear_connecting(xprt);
return;
}
/* get rid of existing socket, and retry */
xs_tcp_shutdown(xprt);
printk("%s: connect returned unhandled error %d\n",
__func__, status);
out_eagain:
status = -EAGAIN;
out:
xprt_clear_connecting(xprt);
xprt_wake_pending_tasks(xprt, status);
}
static struct socket *xs_create_tcp_sock4(struct rpc_xprt *xprt,
struct sock_xprt *transport)
{
struct socket *sock;
int err;
/* start from scratch */
err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock);
if (err < 0) {
dprintk("RPC: can't create TCP transport socket (%d).\n",
-err);
goto out_err;
}
xs_reclassify_socket4(sock);
if (xs_bind4(transport, sock) < 0) {
sock_release(sock);
goto out_err;
}
return sock;
out_err:
return ERR_PTR(-EIO);
}
/**
* xs_tcp_connect_worker4 - connect a TCP socket to a remote endpoint
* @work: RPC transport to connect
@ -1667,53 +1828,32 @@ static void xs_tcp_connect_worker4(struct work_struct *work)
struct sock_xprt *transport =
container_of(work, struct sock_xprt, connect_worker.work);
struct rpc_xprt *xprt = &transport->xprt;
struct socket *sock = transport->sock;
int err, status = -EIO;
if (xprt->shutdown)
goto out;
xs_tcp_setup_socket(xprt, transport, xs_create_tcp_sock4);
}
if (!sock) {
/* start from scratch */
if ((err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock)) < 0) {
dprintk("RPC: can't create TCP transport socket (%d).\n", -err);
goto out;
}
xs_reclassify_socket4(sock);
static struct socket *xs_create_tcp_sock6(struct rpc_xprt *xprt,
struct sock_xprt *transport)
{
struct socket *sock;
int err;
if (xs_bind4(transport, sock) < 0) {
sock_release(sock);
goto out;
}
} else
/* "close" the socket, preserving the local port */
xs_tcp_reuse_connection(xprt);
dprintk("RPC: worker connecting xprt %p to address: %s\n",
xprt, xprt->address_strings[RPC_DISPLAY_ALL]);
status = xs_tcp_finish_connecting(xprt, sock);
dprintk("RPC: %p connect status %d connected %d sock state %d\n",
xprt, -status, xprt_connected(xprt),
sock->sk->sk_state);
if (status < 0) {
switch (status) {
case -EINPROGRESS:
case -EALREADY:
goto out_clear;
case -ECONNREFUSED:
case -ECONNRESET:
/* retry with existing socket, after a delay */
break;
default:
/* get rid of existing socket, and retry */
xs_tcp_shutdown(xprt);
}
/* start from scratch */
err = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, &sock);
if (err < 0) {
dprintk("RPC: can't create TCP transport socket (%d).\n",
-err);
goto out_err;
}
out:
xprt_wake_pending_tasks(xprt, status);
out_clear:
xprt_clear_connecting(xprt);
xs_reclassify_socket6(sock);
if (xs_bind6(transport, sock) < 0) {
sock_release(sock);
goto out_err;
}
return sock;
out_err:
return ERR_PTR(-EIO);
}
/**
@ -1727,52 +1867,8 @@ static void xs_tcp_connect_worker6(struct work_struct *work)
struct sock_xprt *transport =
container_of(work, struct sock_xprt, connect_worker.work);
struct rpc_xprt *xprt = &transport->xprt;
struct socket *sock = transport->sock;
int err, status = -EIO;
if (xprt->shutdown)
goto out;
if (!sock) {
/* start from scratch */
if ((err = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, &sock)) < 0) {
dprintk("RPC: can't create TCP transport socket (%d).\n", -err);
goto out;
}
xs_reclassify_socket6(sock);
if (xs_bind6(transport, sock) < 0) {
sock_release(sock);
goto out;
}
} else
/* "close" the socket, preserving the local port */
xs_tcp_reuse_connection(xprt);
dprintk("RPC: worker connecting xprt %p to address: %s\n",
xprt, xprt->address_strings[RPC_DISPLAY_ALL]);
status = xs_tcp_finish_connecting(xprt, sock);
dprintk("RPC: %p connect status %d connected %d sock state %d\n",
xprt, -status, xprt_connected(xprt), sock->sk->sk_state);
if (status < 0) {
switch (status) {
case -EINPROGRESS:
case -EALREADY:
goto out_clear;
case -ECONNREFUSED:
case -ECONNRESET:
/* retry with existing socket, after a delay */
break;
default:
/* get rid of existing socket, and retry */
xs_tcp_shutdown(xprt);
}
}
out:
xprt_wake_pending_tasks(xprt, status);
out_clear:
xprt_clear_connecting(xprt);
xs_tcp_setup_socket(xprt, transport, xs_create_tcp_sock6);
}
/**
@ -1817,9 +1913,6 @@ static void xs_tcp_connect(struct rpc_task *task)
{
struct rpc_xprt *xprt = task->tk_xprt;
/* Initiate graceful shutdown of the socket if not already done */
if (test_bit(XPRT_CONNECTED, &xprt->state))
xs_tcp_shutdown(xprt);
/* Exit if we need to wait for socket shutdown to complete */
if (test_bit(XPRT_CLOSING, &xprt->state))
return;