#include <net/checksum.h>
#include <net/ip.h>
#include <net/ipv6.h>
+#include <net/tcp.h>
#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/ioctls.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/xdr.h>
+#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/stats.h>
-
-/* SMP locking strategy:
- *
- * svc_pool->sp_lock protects most of the fields of that pool.
- * svc_serv->sv_lock protects sv_tempsocks, sv_permsocks, sv_tmpcnt.
- * when both need to be taken (rare), svc_serv->sv_lock is first.
- * BKL protects svc_serv->sv_nrthread.
- * svc_sock->sk_lock protects the svc_sock->sk_deferred list
- * and the ->sk_info_authunix cache.
- * svc_sock->sk_xprt.xpt_flags.XPT_BUSY prevents a svc_sock being
- * enqueued multiply.
- *
- * Some flags can be set to certain values at any time
- * providing that certain rules are followed:
- *
- * XPT_CONN, XPT_DATA, can be set or cleared at any time.
- * after a set, svc_xprt_enqueue must be called.
- * after a clear, the socket must be read/accepted
- * if this succeeds, it must be set again.
- * XPT_CLOSE can set at any time. It is never cleared.
- * xpt_ref contains a bias of '1' until XPT_DEAD is set.
- * so when xprt_ref hits zero, we know the transport is dead
- * and no-one is using it.
- * XPT_DEAD can only be set while XPT_BUSY is held which ensures
- * no other thread will be using the socket or will try to
- * set XPT_DEAD.
- *
- */
+#include <linux/sunrpc/xprt.h>
#define RPCDBG_FACILITY RPCDBG_SVCXPRT
static struct svc_sock *svc_setup_socket(struct svc_serv *, struct socket *,
int *errp, int flags);
-static void svc_delete_xprt(struct svc_xprt *xprt);
static void svc_udp_data_ready(struct sock *, int);
static int svc_udp_recvfrom(struct svc_rqst *);
static int svc_udp_sendto(struct svc_rqst *);
-static void svc_close_xprt(struct svc_xprt *xprt);
static void svc_sock_detach(struct svc_xprt *);
+static void svc_tcp_sock_detach(struct svc_xprt *);
static void svc_sock_free(struct svc_xprt *);
-static struct svc_deferred_req *svc_deferred_dequeue(struct svc_sock *svsk);
-static int svc_deferred_recv(struct svc_rqst *rqstp);
-static struct cache_deferred_req *svc_defer(struct cache_req *req);
static struct svc_xprt *svc_create_socket(struct svc_serv *, int,
struct sockaddr *, int, int);
-
-/* apparently the "standard" is that clients close
- * idle connections after 5 minutes, servers after
- * 6 minutes
- * http://www.connectathon.org/talks96/nfstcp.pdf
- */
-static int svc_conn_age_period = 6*60;
-
#ifdef CONFIG_DEBUG_LOCK_ALLOC
static struct lock_class_key svc_key[2];
static struct lock_class_key svc_slock_key[2];
-static inline void svc_reclassify_socket(struct socket *sock)
+static void svc_reclassify_socket(struct socket *sock)
{
struct sock *sk = sock->sk;
BUG_ON(sock_owned_by_user(sk));
switch (sk->sk_family) {
case AF_INET:
sock_lock_init_class_and_name(sk, "slock-AF_INET-NFSD",
- &svc_slock_key[0], "sk_lock-AF_INET-NFSD", &svc_key[0]);
+ &svc_slock_key[0],
+ "sk_xprt.xpt_lock-AF_INET-NFSD",
+ &svc_key[0]);
break;
case AF_INET6:
sock_lock_init_class_and_name(sk, "slock-AF_INET6-NFSD",
- &svc_slock_key[1], "sk_lock-AF_INET6-NFSD", &svc_key[1]);
+ &svc_slock_key[1],
+ "sk_xprt.xpt_lock-AF_INET6-NFSD",
+ &svc_key[1]);
break;
default:
}
}
#else
-static inline void svc_reclassify_socket(struct socket *sock)
+static void svc_reclassify_socket(struct socket *sock)
{
}
#endif
-static char *__svc_print_addr(struct sockaddr *addr, char *buf, size_t len)
-{
- switch (addr->sa_family) {
- case AF_INET:
- snprintf(buf, len, "%u.%u.%u.%u, port=%u",
- NIPQUAD(((struct sockaddr_in *) addr)->sin_addr),
- ntohs(((struct sockaddr_in *) addr)->sin_port));
- break;
-
- case AF_INET6:
- snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x, port=%u",
- NIP6(((struct sockaddr_in6 *) addr)->sin6_addr),
- ntohs(((struct sockaddr_in6 *) addr)->sin6_port));
- break;
-
- default:
- snprintf(buf, len, "unknown address type: %d", addr->sa_family);
- break;
- }
- return buf;
-}
-
-/**
- * svc_print_addr - Format rq_addr field for printing
- * @rqstp: svc_rqst struct containing address to print
- * @buf: target buffer for formatted address
- * @len: length of target buffer
- *
- */
-char *svc_print_addr(struct svc_rqst *rqstp, char *buf, size_t len)
-{
- return __svc_print_addr(svc_addr(rqstp), buf, len);
-}
-EXPORT_SYMBOL_GPL(svc_print_addr);
-
-/*
- * Queue up an idle server thread. Must have pool->sp_lock held.
- * Note: this is really a stack rather than a queue, so that we only
- * use as many different threads as we need, and the rest don't pollute
- * the cache.
- */
-static inline void
-svc_thread_enqueue(struct svc_pool *pool, struct svc_rqst *rqstp)
-{
- list_add(&rqstp->rq_list, &pool->sp_threads);
-}
-
-/*
- * Dequeue an nfsd thread. Must have pool->sp_lock held.
- */
-static inline void
-svc_thread_dequeue(struct svc_pool *pool, struct svc_rqst *rqstp)
-{
- list_del(&rqstp->rq_list);
-}
-
/*
* Release an skbuff after use
*/
static void svc_release_skb(struct svc_rqst *rqstp)
{
struct sk_buff *skb = rqstp->rq_xprt_ctxt;
- struct svc_deferred_req *dr = rqstp->rq_deferred;
if (skb) {
+ struct svc_sock *svsk =
+ container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
rqstp->rq_xprt_ctxt = NULL;
dprintk("svc: service %p, releasing skb %p\n", rqstp, skb);
- skb_free_datagram(rqstp->rq_sock->sk_sk, skb);
- }
- if (dr) {
- rqstp->rq_deferred = NULL;
- kfree(dr);
- }
-}
-
-/*
- * Queue up a socket with data pending. If there are idle nfsd
- * processes, wake 'em up.
- *
- */
-void svc_xprt_enqueue(struct svc_xprt *xprt)
-{
- struct svc_serv *serv = xprt->xpt_server;
- struct svc_pool *pool;
- struct svc_rqst *rqstp;
- int cpu;
-
- if (!(xprt->xpt_flags &
- ((1<<XPT_CONN)|(1<<XPT_DATA)|(1<<XPT_CLOSE)|(1<<XPT_DEFERRED))))
- return;
- if (test_bit(XPT_DEAD, &xprt->xpt_flags))
- return;
-
- cpu = get_cpu();
- pool = svc_pool_for_cpu(xprt->xpt_server, cpu);
- put_cpu();
-
- spin_lock_bh(&pool->sp_lock);
-
- if (!list_empty(&pool->sp_threads) &&
- !list_empty(&pool->sp_sockets))
- printk(KERN_ERR
- "svc_xprt_enqueue: "
- "threads and transports both waiting??\n");
-
- if (test_bit(XPT_DEAD, &xprt->xpt_flags)) {
- /* Don't enqueue dead sockets */
- dprintk("svc: transport %p is dead, not enqueued\n", xprt);
- goto out_unlock;
- }
-
- /* Mark socket as busy. It will remain in this state until the
- * server has processed all pending data and put the socket back
- * on the idle list. We update XPT_BUSY atomically because
- * it also guards against trying to enqueue the svc_sock twice.
- */
- if (test_and_set_bit(XPT_BUSY, &xprt->xpt_flags)) {
- /* Don't enqueue socket while already enqueued */
- dprintk("svc: transport %p busy, not enqueued\n", xprt);
- goto out_unlock;
- }
- BUG_ON(xprt->xpt_pool != NULL);
- xprt->xpt_pool = pool;
-
- /* Handle pending connection */
- if (test_bit(XPT_CONN, &xprt->xpt_flags))
- goto process;
-
- /* Handle close in-progress */
- if (test_bit(XPT_CLOSE, &xprt->xpt_flags))
- goto process;
-
- /* Check if we have space to reply to a request */
- if (!xprt->xpt_ops->xpo_has_wspace(xprt)) {
- /* Don't enqueue while not enough space for reply */
- dprintk("svc: no write space, transport %p not enqueued\n",
- xprt);
- xprt->xpt_pool = NULL;
- clear_bit(XPT_BUSY, &xprt->xpt_flags);
- goto out_unlock;
- }
-
- process:
- if (!list_empty(&pool->sp_threads)) {
- rqstp = list_entry(pool->sp_threads.next,
- struct svc_rqst,
- rq_list);
- dprintk("svc: transport %p served by daemon %p\n",
- xprt, rqstp);
- svc_thread_dequeue(pool, rqstp);
- if (rqstp->rq_xprt)
- printk(KERN_ERR
- "svc_xprt_enqueue: server %p, rq_xprt=%p!\n",
- rqstp, rqstp->rq_xprt);
- rqstp->rq_xprt = xprt;
- svc_xprt_get(xprt);
- rqstp->rq_reserved = serv->sv_max_mesg;
- atomic_add(rqstp->rq_reserved, &xprt->xpt_reserved);
- BUG_ON(xprt->xpt_pool != pool);
- wake_up(&rqstp->rq_wait);
- } else {
- dprintk("svc: transport %p put into queue\n", xprt);
- list_add_tail(&xprt->xpt_ready, &pool->sp_sockets);
- BUG_ON(xprt->xpt_pool != pool);
- }
-
-out_unlock:
- spin_unlock_bh(&pool->sp_lock);
-}
-EXPORT_SYMBOL_GPL(svc_xprt_enqueue);
-
-/*
- * Dequeue the first socket. Must be called with the pool->sp_lock held.
- */
-static inline struct svc_sock *
-svc_sock_dequeue(struct svc_pool *pool)
-{
- struct svc_sock *svsk;
-
- if (list_empty(&pool->sp_sockets))
- return NULL;
-
- svsk = list_entry(pool->sp_sockets.next,
- struct svc_sock, sk_xprt.xpt_ready);
- list_del_init(&svsk->sk_xprt.xpt_ready);
-
- dprintk("svc: socket %p dequeued, inuse=%d\n",
- svsk->sk_sk, atomic_read(&svsk->sk_xprt.xpt_ref.refcount));
-
- return svsk;
-}
-
-/*
- * svc_xprt_received conditionally queues the transport for processing
- * by another thread. The caller must hold the XPT_BUSY bit and must
- * not thereafter touch transport data.
- *
- * Note: XPT_DATA only gets cleared when a read-attempt finds no (or
- * insufficient) data.
- */
-void svc_xprt_received(struct svc_xprt *xprt)
-{
- BUG_ON(!test_bit(XPT_BUSY, &xprt->xpt_flags));
- xprt->xpt_pool = NULL;
- clear_bit(XPT_BUSY, &xprt->xpt_flags);
- svc_xprt_enqueue(xprt);
-}
-EXPORT_SYMBOL_GPL(svc_xprt_received);
-
-/**
- * svc_reserve - change the space reserved for the reply to a request.
- * @rqstp: The request in question
- * @space: new max space to reserve
- *
- * Each request reserves some space on the output queue of the socket
- * to make sure the reply fits. This function reduces that reserved
- * space to be the amount of space used already, plus @space.
- *
- */
-void svc_reserve(struct svc_rqst *rqstp, int space)
-{
- space += rqstp->rq_res.head[0].iov_len;
-
- if (space < rqstp->rq_reserved) {
- struct svc_xprt *xprt = rqstp->rq_xprt;
- atomic_sub((rqstp->rq_reserved - space), &xprt->xpt_reserved);
- rqstp->rq_reserved = space;
-
- svc_xprt_enqueue(xprt);
- }
-}
-
-static void
-svc_sock_release(struct svc_rqst *rqstp)
-{
- struct svc_sock *svsk = rqstp->rq_sock;
-
- rqstp->rq_xprt->xpt_ops->xpo_release_rqst(rqstp);
-
- svc_free_res_pages(rqstp);
- rqstp->rq_res.page_len = 0;
- rqstp->rq_res.page_base = 0;
-
-
- /* Reset response buffer and release
- * the reservation.
- * But first, check that enough space was reserved
- * for the reply, otherwise we have a bug!
- */
- if ((rqstp->rq_res.len) > rqstp->rq_reserved)
- printk(KERN_ERR "RPC request reserved %d but used %d\n",
- rqstp->rq_reserved,
- rqstp->rq_res.len);
-
- rqstp->rq_res.head[0].iov_len = 0;
- svc_reserve(rqstp, 0);
- rqstp->rq_sock = NULL;
-
- svc_xprt_put(&svsk->sk_xprt);
-}
-
-/*
- * External function to wake up a server waiting for data
- * This really only makes sense for services like lockd
- * which have exactly one thread anyway.
- */
-void
-svc_wake_up(struct svc_serv *serv)
-{
- struct svc_rqst *rqstp;
- unsigned int i;
- struct svc_pool *pool;
-
- for (i = 0; i < serv->sv_nrpools; i++) {
- pool = &serv->sv_pools[i];
-
- spin_lock_bh(&pool->sp_lock);
- if (!list_empty(&pool->sp_threads)) {
- rqstp = list_entry(pool->sp_threads.next,
- struct svc_rqst,
- rq_list);
- dprintk("svc: daemon %p woken up.\n", rqstp);
- /*
- svc_thread_dequeue(pool, rqstp);
- rqstp->rq_sock = NULL;
- */
- wake_up(&rqstp->rq_wait);
- }
- spin_unlock_bh(&pool->sp_lock);
+ skb_free_datagram_locked(svsk->sk_sk, skb);
}
}
static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh)
{
- switch (rqstp->rq_sock->sk_sk->sk_family) {
+ struct svc_sock *svsk =
+ container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
+ switch (svsk->sk_sk->sk_family) {
case AF_INET: {
struct in_pktinfo *pki = CMSG_DATA(cmh);
}
break;
}
- return;
}
/*
- * Generic sendto routine
+ * send routine intended to be shared by the fore- and back-channel
*/
-static int
-svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
+int svc_send_common(struct socket *sock, struct xdr_buf *xdr,
+ struct page *headpage, unsigned long headoffset,
+ struct page *tailpage, unsigned long tailoffset)
{
- struct svc_sock *svsk = rqstp->rq_sock;
- struct socket *sock = svsk->sk_sock;
- int slen;
- union {
- struct cmsghdr hdr;
- long all[SVC_PKTINFO_SPACE / sizeof(long)];
- } buffer;
- struct cmsghdr *cmh = &buffer.hdr;
- int len = 0;
int result;
int size;
struct page **ppage = xdr->pages;
size_t base = xdr->page_base;
unsigned int pglen = xdr->page_len;
unsigned int flags = MSG_MORE;
- char buf[RPC_MAX_ADDRBUFLEN];
+ int slen;
+ int len = 0;
slen = xdr->len;
- if (rqstp->rq_prot == IPPROTO_UDP) {
- struct msghdr msg = {
- .msg_name = &rqstp->rq_addr,
- .msg_namelen = rqstp->rq_addrlen,
- .msg_control = cmh,
- .msg_controllen = sizeof(buffer),
- .msg_flags = MSG_MORE,
- };
-
- svc_set_cmsg_data(rqstp, cmh);
-
- if (sock_sendmsg(sock, &msg, 0) < 0)
- goto out;
- }
-
/* send head */
if (slen == xdr->head[0].iov_len)
flags = 0;
- len = kernel_sendpage(sock, rqstp->rq_respages[0], 0,
+ len = kernel_sendpage(sock, headpage, headoffset,
xdr->head[0].iov_len, flags);
if (len != xdr->head[0].iov_len)
goto out;
base = 0;
ppage++;
}
+
/* send tail */
if (xdr->tail[0].iov_len) {
- result = kernel_sendpage(sock, rqstp->rq_respages[0],
- ((unsigned long)xdr->tail[0].iov_base)
- & (PAGE_SIZE-1),
- xdr->tail[0].iov_len, 0);
-
+ result = kernel_sendpage(sock, tailpage, tailoffset,
+ xdr->tail[0].iov_len, 0);
if (result > 0)
len += result;
}
+
+out:
+ return len;
+}
+
+
+/*
+ * Generic sendto routine
+ */
+static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
+{
+ struct svc_sock *svsk =
+ container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
+ struct socket *sock = svsk->sk_sock;
+ union {
+ struct cmsghdr hdr;
+ long all[SVC_PKTINFO_SPACE / sizeof(long)];
+ } buffer;
+ struct cmsghdr *cmh = &buffer.hdr;
+ int len = 0;
+ unsigned long tailoff;
+ unsigned long headoff;
+ RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
+
+ if (rqstp->rq_prot == IPPROTO_UDP) {
+ struct msghdr msg = {
+ .msg_name = &rqstp->rq_addr,
+ .msg_namelen = rqstp->rq_addrlen,
+ .msg_control = cmh,
+ .msg_controllen = sizeof(buffer),
+ .msg_flags = MSG_MORE,
+ };
+
+ svc_set_cmsg_data(rqstp, cmh);
+
+ if (sock_sendmsg(sock, &msg, 0) < 0)
+ goto out;
+ }
+
+ tailoff = ((unsigned long)xdr->tail[0].iov_base) & (PAGE_SIZE-1);
+ headoff = 0;
+ len = svc_send_common(sock, xdr, rqstp->rq_respages[0], headoff,
+ rqstp->rq_respages[0], tailoff);
+
out:
dprintk("svc: socket %p sendto([%p %Zu... ], %d) = %d (addr %s)\n",
- rqstp->rq_sock, xdr->head[0].iov_base, xdr->head[0].iov_len,
+ svsk, xdr->head[0].iov_base, xdr->head[0].iov_len,
xdr->len, len, svc_print_addr(rqstp, buf, sizeof(buf)));
return len;
/*
* Report socket names for nfsdfs
*/
-static int one_sock_name(char *buf, struct svc_sock *svsk)
+static int svc_one_sock_name(struct svc_sock *svsk, char *buf, int remaining)
{
+ const struct sock *sk = svsk->sk_sk;
+ const char *proto_name = sk->sk_protocol == IPPROTO_UDP ?
+ "udp" : "tcp";
int len;
- switch(svsk->sk_sk->sk_family) {
- case AF_INET:
- len = sprintf(buf, "ipv4 %s %u.%u.%u.%u %d\n",
- svsk->sk_sk->sk_protocol==IPPROTO_UDP?
- "udp" : "tcp",
- NIPQUAD(inet_sk(svsk->sk_sk)->rcv_saddr),
- inet_sk(svsk->sk_sk)->num);
+ switch (sk->sk_family) {
+ case PF_INET:
+ len = snprintf(buf, remaining, "ipv4 %s %pI4 %d\n",
+ proto_name,
+ &inet_sk(sk)->inet_rcv_saddr,
+ inet_sk(sk)->inet_num);
+ break;
+ case PF_INET6:
+ len = snprintf(buf, remaining, "ipv6 %s %pI6 %d\n",
+ proto_name,
+ &inet6_sk(sk)->rcv_saddr,
+ inet_sk(sk)->inet_num);
break;
default:
- len = sprintf(buf, "*unknown-%d*\n",
- svsk->sk_sk->sk_family);
+ len = snprintf(buf, remaining, "*unknown-%d*\n",
+ sk->sk_family);
+ }
+
+ if (len >= remaining) {
+ *buf = '\0';
+ return -ENAMETOOLONG;
}
return len;
}
-int
-svc_sock_names(char *buf, struct svc_serv *serv, char *toclose)
+/**
+ * svc_sock_names - construct a list of listener names in a string
+ * @serv: pointer to RPC service
+ * @buf: pointer to a buffer to fill in with socket names
+ * @buflen: size of the buffer to be filled
+ * @toclose: pointer to '\0'-terminated C string containing the name
+ * of a listener to be closed
+ *
+ * Fills in @buf with a '\n'-separated list of names of listener
+ * sockets. If @toclose is not NULL, the socket named by @toclose
+ * is closed, and is not included in the output list.
+ *
+ * Returns positive length of the socket name string, or a negative
+ * errno value on error.
+ */
+int svc_sock_names(struct svc_serv *serv, char *buf, const size_t buflen,
+ const char *toclose)
{
struct svc_sock *svsk, *closesk = NULL;
int len = 0;
if (!serv)
return 0;
+
spin_lock_bh(&serv->sv_lock);
list_for_each_entry(svsk, &serv->sv_permsocks, sk_xprt.xpt_list) {
- int onelen = one_sock_name(buf+len, svsk);
- if (toclose && strcmp(toclose, buf+len) == 0)
+ int onelen = svc_one_sock_name(svsk, buf + len, buflen - len);
+ if (onelen < 0) {
+ len = onelen;
+ break;
+ }
+ if (toclose && strcmp(toclose, buf + len) == 0)
closesk = svsk;
else
len += onelen;
}
spin_unlock_bh(&serv->sv_lock);
+
if (closesk)
/* Should unregister with portmap, but you cannot
* unregister just one protocol...
return -ENOENT;
return len;
}
-EXPORT_SYMBOL(svc_sock_names);
+EXPORT_SYMBOL_GPL(svc_sock_names);
/*
* Check input queue length
*/
-static int
-svc_recv_available(struct svc_sock *svsk)
+static int svc_recv_available(struct svc_sock *svsk)
{
struct socket *sock = svsk->sk_sock;
int avail, err;
/*
* Generic recvfrom routine.
*/
-static int
-svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr, int buflen)
+static int svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr,
+ int buflen)
{
- struct svc_sock *svsk = rqstp->rq_sock;
+ struct svc_sock *svsk =
+ container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
struct msghdr msg = {
.msg_flags = MSG_DONTWAIT,
};
- struct sockaddr *sin;
int len;
+ rqstp->rq_xprt_hlen = 0;
+
len = kernel_recvmsg(svsk->sk_sock, &msg, iov, nr, buflen,
msg.msg_flags);
- /* sock_recvmsg doesn't fill in the name/namelen, so we must..
- */
- memcpy(&rqstp->rq_addr, &svsk->sk_remote, svsk->sk_remotelen);
- rqstp->rq_addrlen = svsk->sk_remotelen;
-
- /* Destination address in request is needed for binding the
- * source address in RPC callbacks later.
- */
- sin = (struct sockaddr *)&svsk->sk_local;
- switch (sin->sa_family) {
- case AF_INET:
- rqstp->rq_daddr.addr = ((struct sockaddr_in *)sin)->sin_addr;
- break;
- case AF_INET6:
- rqstp->rq_daddr.addr6 = ((struct sockaddr_in6 *)sin)->sin6_addr;
- break;
- }
-
dprintk("svc: socket %p recvfrom(%p, %Zu) = %d\n",
svsk, iov[0].iov_base, iov[0].iov_len, len);
-
return len;
}
/*
* Set socket snd and rcv buffer lengths
*/
-static inline void
-svc_sock_setbufsize(struct socket *sock, unsigned int snd, unsigned int rcv)
+static void svc_sock_setbufsize(struct socket *sock, unsigned int snd,
+ unsigned int rcv)
{
#if 0
mm_segment_t oldfs;
sock->sk->sk_sndbuf = snd * 2;
sock->sk->sk_rcvbuf = rcv * 2;
sock->sk->sk_userlocks |= SOCK_SNDBUF_LOCK|SOCK_RCVBUF_LOCK;
+ sock->sk->sk_write_space(sock->sk);
release_sock(sock->sk);
#endif
}
/*
* INET callback when data has been received on the socket.
*/
-static void
-svc_udp_data_ready(struct sock *sk, int count)
+static void svc_udp_data_ready(struct sock *sk, int count)
{
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
svc_xprt_enqueue(&svsk->sk_xprt);
}
- if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
- wake_up_interruptible(sk->sk_sleep);
+ if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
+ wake_up_interruptible(sk_sleep(sk));
}
/*
* INET callback when space is newly available on the socket.
*/
-static void
-svc_write_space(struct sock *sk)
+static void svc_write_space(struct sock *sk)
{
struct svc_sock *svsk = (struct svc_sock *)(sk->sk_user_data);
svc_xprt_enqueue(&svsk->sk_xprt);
}
- if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) {
+ if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk))) {
dprintk("RPC svc_write_space: someone sleeping on %p\n",
svsk);
- wake_up_interruptible(sk->sk_sleep);
+ wake_up_interruptible(sk_sleep(sk));
}
}
-static inline void svc_udp_get_dest_address(struct svc_rqst *rqstp,
- struct cmsghdr *cmh)
+static void svc_tcp_write_space(struct sock *sk)
{
- switch (rqstp->rq_sock->sk_sk->sk_family) {
- case AF_INET: {
- struct in_pktinfo *pki = CMSG_DATA(cmh);
- rqstp->rq_daddr.addr.s_addr = pki->ipi_spec_dst.s_addr;
- break;
- }
- case AF_INET6: {
- struct in6_pktinfo *pki = CMSG_DATA(cmh);
- ipv6_addr_copy(&rqstp->rq_daddr.addr6, &pki->ipi6_addr);
- break;
- }
+ struct socket *sock = sk->sk_socket;
+
+ if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) && sock)
+ clear_bit(SOCK_NOSPACE, &sock->flags);
+ svc_write_space(sk);
+}
+
+/*
+ * See net/ipv6/ip_sockglue.c : ip_cmsg_recv_pktinfo
+ */
+static int svc_udp_get_dest_address4(struct svc_rqst *rqstp,
+ struct cmsghdr *cmh)
+{
+ struct in_pktinfo *pki = CMSG_DATA(cmh);
+ if (cmh->cmsg_type != IP_PKTINFO)
+ return 0;
+ rqstp->rq_daddr.addr.s_addr = pki->ipi_spec_dst.s_addr;
+ return 1;
+}
+
+/*
+ * See net/ipv6/datagram.c : datagram_recv_ctl
+ */
+static int svc_udp_get_dest_address6(struct svc_rqst *rqstp,
+ struct cmsghdr *cmh)
+{
+ struct in6_pktinfo *pki = CMSG_DATA(cmh);
+ if (cmh->cmsg_type != IPV6_PKTINFO)
+ return 0;
+ ipv6_addr_copy(&rqstp->rq_daddr.addr6, &pki->ipi6_addr);
+ return 1;
+}
+
+/*
+ * Copy the UDP datagram's destination address to the rqstp structure.
+ * The 'destination' address in this case is the address to which the
+ * peer sent the datagram, i.e. our local address. For multihomed
+ * hosts, this can change from msg to msg. Note that only the IP
+ * address changes, the port number should remain the same.
+ */
+static int svc_udp_get_dest_address(struct svc_rqst *rqstp,
+ struct cmsghdr *cmh)
+{
+ switch (cmh->cmsg_level) {
+ case SOL_IP:
+ return svc_udp_get_dest_address4(rqstp, cmh);
+ case SOL_IPV6:
+ return svc_udp_get_dest_address6(rqstp, cmh);
}
+
+ return 0;
}
/*
* Receive a datagram from a UDP socket.
*/
-static int
-svc_udp_recvfrom(struct svc_rqst *rqstp)
+static int svc_udp_recvfrom(struct svc_rqst *rqstp)
{
- struct svc_sock *svsk = rqstp->rq_sock;
+ struct svc_sock *svsk =
+ container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
struct svc_serv *serv = svsk->sk_xprt.xpt_server;
struct sk_buff *skb;
union {
long all[SVC_PKTINFO_SPACE / sizeof(long)];
} buffer;
struct cmsghdr *cmh = &buffer.hdr;
- int err, len;
struct msghdr msg = {
.msg_name = svc_addr(rqstp),
.msg_control = cmh,
.msg_controllen = sizeof(buffer),
.msg_flags = MSG_DONTWAIT,
};
+ size_t len;
+ int err;
if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags))
/* udp sockets need large rcvbuf as all pending
(serv->sv_nrthreads+3) * serv->sv_max_mesg,
(serv->sv_nrthreads+3) * serv->sv_max_mesg);
- if ((rqstp->rq_deferred = svc_deferred_dequeue(svsk))) {
- svc_xprt_received(&svsk->sk_xprt);
- return svc_deferred_recv(rqstp);
- }
-
clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
skb = NULL;
err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
dprintk("svc: recvfrom returned error %d\n", -err);
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
}
- svc_xprt_received(&svsk->sk_xprt);
return -EAGAIN;
}
- rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
+ len = svc_addr_len(svc_addr(rqstp));
+ if (len == 0)
+ return -EAFNOSUPPORT;
+ rqstp->rq_addrlen = len;
if (skb->tstamp.tv64 == 0) {
skb->tstamp = ktime_get_real();
/* Don't enable netstamp, sunrpc doesn't
svsk->sk_sk->sk_stamp = skb->tstamp;
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); /* there may be more data... */
- /*
- * Maybe more packets - kick another thread ASAP.
- */
- svc_xprt_received(&svsk->sk_xprt);
-
len = skb->len - sizeof(struct udphdr);
rqstp->rq_arg.len = len;
rqstp->rq_prot = IPPROTO_UDP;
- if (cmh->cmsg_level != IPPROTO_IP ||
- cmh->cmsg_type != IP_PKTINFO) {
+ if (!svc_udp_get_dest_address(rqstp, cmh)) {
if (net_ratelimit())
- printk("rpcsvc: received unknown control message:"
- "%d/%d\n",
- cmh->cmsg_level, cmh->cmsg_type);
- skb_free_datagram(svsk->sk_sk, skb);
+ printk(KERN_WARNING
+ "svc: received unknown control message %d/%d; "
+ "dropping RPC reply datagram\n",
+ cmh->cmsg_level, cmh->cmsg_type);
+ skb_free_datagram_locked(svsk->sk_sk, skb);
return 0;
}
- svc_udp_get_dest_address(rqstp, cmh);
if (skb_is_nonlinear(skb)) {
/* we have to copy */
if (csum_partial_copy_to_xdr(&rqstp->rq_arg, skb)) {
local_bh_enable();
/* checksum error */
- skb_free_datagram(svsk->sk_sk, skb);
+ skb_free_datagram_locked(svsk->sk_sk, skb);
return 0;
}
local_bh_enable();
- skb_free_datagram(svsk->sk_sk, skb);
+ skb_free_datagram_locked(svsk->sk_sk, skb);
} else {
/* we can use it in-place */
- rqstp->rq_arg.head[0].iov_base = skb->data + sizeof(struct udphdr);
+ rqstp->rq_arg.head[0].iov_base = skb->data +
+ sizeof(struct udphdr);
rqstp->rq_arg.head[0].iov_len = len;
if (skb_checksum_complete(skb)) {
- skb_free_datagram(svsk->sk_sk, skb);
+ skb_free_datagram_locked(svsk->sk_sk, skb);
return 0;
}
rqstp->rq_xprt_ctxt = skb;
static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv)
{
- int one = 1;
- mm_segment_t oldfs;
+ int err, level, optname, one = 1;
svc_xprt_init(&svc_udp_class, &svsk->sk_xprt, serv);
+ clear_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags);
svsk->sk_sk->sk_data_ready = svc_udp_data_ready;
svsk->sk_sk->sk_write_space = svc_write_space;
3 * svsk->sk_xprt.xpt_server->sv_max_mesg,
3 * svsk->sk_xprt.xpt_server->sv_max_mesg);
- set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); /* might have come in before data_ready set up */
+ /* data might have come in before data_ready set up */
+ set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags);
- oldfs = get_fs();
- set_fs(KERNEL_DS);
/* make sure we get destination address info */
- svsk->sk_sock->ops->setsockopt(svsk->sk_sock, IPPROTO_IP, IP_PKTINFO,
- (char __user *)&one, sizeof(one));
- set_fs(oldfs);
+ switch (svsk->sk_sk->sk_family) {
+ case AF_INET:
+ level = SOL_IP;
+ optname = IP_PKTINFO;
+ break;
+ case AF_INET6:
+ level = SOL_IPV6;
+ optname = IPV6_RECVPKTINFO;
+ break;
+ default:
+ BUG();
+ }
+ err = kernel_setsockopt(svsk->sk_sock, level, optname,
+ (char *)&one, sizeof(one));
+ dprintk("svc: kernel_setsockopt returned %d\n", err);
}
/*
* A data_ready event on a listening socket means there's a connection
* pending. Do not use state_change as a substitute for it.
*/
-static void
-svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
+static void svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
{
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
printk("svc: socket %p: no user data\n", sk);
}
- if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
- wake_up_interruptible_all(sk->sk_sleep);
+ if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
+ wake_up_interruptible_all(sk_sleep(sk));
}
/*
* A state change on a connected socket means it's dying or dead.
*/
-static void
-svc_tcp_state_change(struct sock *sk)
+static void svc_tcp_state_change(struct sock *sk)
{
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
svc_xprt_enqueue(&svsk->sk_xprt);
}
- if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
- wake_up_interruptible_all(sk->sk_sleep);
+ if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
+ wake_up_interruptible_all(sk_sleep(sk));
}
-static void
-svc_tcp_data_ready(struct sock *sk, int count)
+static void svc_tcp_data_ready(struct sock *sk, int count)
{
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
svc_xprt_enqueue(&svsk->sk_xprt);
}
- if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
- wake_up_interruptible(sk->sk_sleep);
-}
-
-static inline int svc_port_is_privileged(struct sockaddr *sin)
-{
- switch (sin->sa_family) {
- case AF_INET:
- return ntohs(((struct sockaddr_in *)sin)->sin_port)
- < PROT_SOCK;
- case AF_INET6:
- return ntohs(((struct sockaddr_in6 *)sin)->sin6_port)
- < PROT_SOCK;
- default:
- return 0;
- }
+ if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
+ wake_up_interruptible(sk_sleep(sk));
}
/*
struct socket *newsock;
struct svc_sock *newsvsk;
int err, slen;
- char buf[RPC_MAX_ADDRBUFLEN];
+ RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
dprintk("svc: tcp_accept %p sock %p\n", svsk, sock);
if (!sock)
if (!(newsvsk = svc_setup_socket(serv, newsock, &err,
(SVC_SOCK_ANONYMOUS | SVC_SOCK_TEMPORARY))))
goto failed;
- memcpy(&newsvsk->sk_remote, sin, slen);
- newsvsk->sk_remotelen = slen;
+ svc_xprt_set_remote(&newsvsk->sk_xprt, sin, slen);
err = kernel_getsockname(newsock, sin, &slen);
if (unlikely(err < 0)) {
dprintk("svc_tcp_accept: kernel_getsockname error %d\n", -err);
slen = offsetof(struct sockaddr, sa_data);
}
- memcpy(&newsvsk->sk_local, sin, slen);
+ svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen);
if (serv->sv_stats)
serv->sv_stats->nettcpconn++;
}
/*
- * Receive data from a TCP socket.
+ * Receive data.
+ * If we haven't gotten the record length yet, get the next four bytes.
+ * Otherwise try to gobble up as much as possible up to the complete
+ * record length.
*/
-static int
-svc_tcp_recvfrom(struct svc_rqst *rqstp)
+static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp)
{
- struct svc_sock *svsk = rqstp->rq_sock;
struct svc_serv *serv = svsk->sk_xprt.xpt_server;
- int len;
- struct kvec *vec;
- int pnum, vlen;
-
- dprintk("svc: tcp_recv %p data %d conn %d close %d\n",
- svsk, test_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags),
- test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags),
- test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags));
-
- if ((rqstp->rq_deferred = svc_deferred_dequeue(svsk))) {
- svc_xprt_received(&svsk->sk_xprt);
- return svc_deferred_recv(rqstp);
- }
+ int len;
if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags))
/* sndbuf needs to have room for one request
clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
- /* Receive data. If we haven't got the record length yet, get
- * the next four bytes. Otherwise try to gobble up as much as
- * possible up to the complete record length.
- */
- if (svsk->sk_tcplen < 4) {
- unsigned long want = 4 - svsk->sk_tcplen;
+ if (svsk->sk_tcplen < sizeof(rpc_fraghdr)) {
+ int want = sizeof(rpc_fraghdr) - svsk->sk_tcplen;
struct kvec iov;
iov.iov_base = ((char *) &svsk->sk_reclen) + svsk->sk_tcplen;
svsk->sk_tcplen += len;
if (len < want) {
- dprintk("svc: short recvfrom while reading record length (%d of %lu)\n",
- len, want);
- svc_xprt_received(&svsk->sk_xprt);
- return -EAGAIN; /* record header not complete */
+ dprintk("svc: short recvfrom while reading record "
+ "length (%d of %d)\n", len, want);
+ goto err_again; /* record header not complete */
}
svsk->sk_reclen = ntohl(svsk->sk_reclen);
- if (!(svsk->sk_reclen & 0x80000000)) {
+ if (!(svsk->sk_reclen & RPC_LAST_STREAM_FRAGMENT)) {
/* FIXME: technically, a record can be fragmented,
* and non-terminal fragments will not have the top
* bit set in the fragment length header.
* But apparently no known nfs clients send fragmented
* records. */
if (net_ratelimit())
- printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx"
- " (non-terminal)\n",
- (unsigned long) svsk->sk_reclen);
+ printk(KERN_NOTICE "RPC: multiple fragments "
+ "per record not supported\n");
goto err_delete;
}
- svsk->sk_reclen &= 0x7fffffff;
+
+ svsk->sk_reclen &= RPC_FRAGMENT_SIZE_MASK;
dprintk("svc: TCP record, %d bytes\n", svsk->sk_reclen);
if (svsk->sk_reclen > serv->sv_max_mesg) {
if (net_ratelimit())
- printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx"
- " (large)\n",
- (unsigned long) svsk->sk_reclen);
+ printk(KERN_NOTICE "RPC: "
+ "fragment too large: 0x%08lx\n",
+ (unsigned long)svsk->sk_reclen);
goto err_delete;
}
}
if (len < svsk->sk_reclen) {
dprintk("svc: incomplete TCP record (%d of %d)\n",
len, svsk->sk_reclen);
- svc_xprt_received(&svsk->sk_xprt);
- return -EAGAIN; /* record not complete */
+ goto err_again; /* record not complete */
}
len = svsk->sk_reclen;
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
+ return len;
+ error:
+ if (len == -EAGAIN)
+ dprintk("RPC: TCP recv_record got EAGAIN\n");
+ return len;
+ err_delete:
+ set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
+ err_again:
+ return -EAGAIN;
+}
+
+static int svc_process_calldir(struct svc_sock *svsk, struct svc_rqst *rqstp,
+ struct rpc_rqst **reqpp, struct kvec *vec)
+{
+ struct rpc_rqst *req = NULL;
+ u32 *p;
+ u32 xid;
+ u32 calldir;
+ int len;
+
+ len = svc_recvfrom(rqstp, vec, 1, 8);
+ if (len < 0)
+ goto error;
+
+ p = (u32 *)rqstp->rq_arg.head[0].iov_base;
+ xid = *p++;
+ calldir = *p;
+
+ if (calldir == 0) {
+ /* REQUEST is the most common case */
+ vec[0] = rqstp->rq_arg.head[0];
+ } else {
+ /* REPLY */
+ if (svsk->sk_bc_xprt)
+ req = xprt_lookup_rqst(svsk->sk_bc_xprt, xid);
+
+ if (!req) {
+ printk(KERN_NOTICE
+ "%s: Got unrecognized reply: "
+ "calldir 0x%x sk_bc_xprt %p xid %08x\n",
+ __func__, ntohl(calldir),
+ svsk->sk_bc_xprt, xid);
+ vec[0] = rqstp->rq_arg.head[0];
+ goto out;
+ }
+
+ memcpy(&req->rq_private_buf, &req->rq_rcv_buf,
+ sizeof(struct xdr_buf));
+ /* copy the xid and call direction */
+ memcpy(req->rq_private_buf.head[0].iov_base,
+ rqstp->rq_arg.head[0].iov_base, 8);
+ vec[0] = req->rq_private_buf.head[0];
+ }
+ out:
+ vec[0].iov_base += 8;
+ vec[0].iov_len -= 8;
+ len = svsk->sk_reclen - 8;
+ error:
+ *reqpp = req;
+ return len;
+}
+
+/*
+ * Receive data from a TCP socket.
+ */
+static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
+{
+ struct svc_sock *svsk =
+ container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
+ struct svc_serv *serv = svsk->sk_xprt.xpt_server;
+ int len;
+ struct kvec *vec;
+ int pnum, vlen;
+ struct rpc_rqst *req = NULL;
+
+ dprintk("svc: tcp_recv %p data %d conn %d close %d\n",
+ svsk, test_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags),
+ test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags),
+ test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags));
+
+ len = svc_tcp_recv_record(svsk, rqstp);
+ if (len < 0)
+ goto error;
+
vec = rqstp->rq_vec;
vec[0] = rqstp->rq_arg.head[0];
vlen = PAGE_SIZE;
+
+ /*
+ * We have enough data for the whole tcp record. Let's try and read the
+ * first 8 bytes to get the xid and the call direction. We can use this
+ * to figure out if this is a call or a reply to a callback. If
+ * sk_reclen is < 8 (xid and calldir), then this is a malformed packet.
+ * In that case, don't bother with the calldir and just read the data.
+ * It will be rejected in svc_process.
+ */
+ if (len >= 8) {
+ len = svc_process_calldir(svsk, rqstp, &req, vec);
+ if (len < 0)
+ goto err_again;
+ vlen -= 8;
+ }
+
pnum = 1;
while (vlen < len) {
- vec[pnum].iov_base = page_address(rqstp->rq_pages[pnum]);
+ vec[pnum].iov_base = (req) ?
+ page_address(req->rq_private_buf.pages[pnum - 1]) :
+ page_address(rqstp->rq_pages[pnum]);
vec[pnum].iov_len = PAGE_SIZE;
pnum++;
vlen += PAGE_SIZE;
/* Now receive data */
len = svc_recvfrom(rqstp, vec, pnum, len);
if (len < 0)
- goto error;
+ goto err_again;
+ /*
+ * Account for the 8 bytes we read earlier
+ */
+ len += 8;
+
+ if (req) {
+ xprt_complete_rqst(req->rq_task, len);
+ len = 0;
+ goto out;
+ }
dprintk("svc: TCP complete record (%d bytes)\n", len);
rqstp->rq_arg.len = len;
rqstp->rq_arg.page_base = 0;
rqstp->rq_xprt_ctxt = NULL;
rqstp->rq_prot = IPPROTO_TCP;
+out:
/* Reset TCP read info */
svsk->sk_reclen = 0;
svsk->sk_tcplen = 0;
- svc_xprt_received(&svsk->sk_xprt);
+ svc_xprt_copy_addrs(rqstp, &svsk->sk_xprt);
if (serv->sv_stats)
serv->sv_stats->nettcpcnt++;
return len;
- err_delete:
- set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
- return -EAGAIN;
-
- error:
+err_again:
if (len == -EAGAIN) {
dprintk("RPC: TCP recvfrom got EAGAIN\n");
- svc_xprt_received(&svsk->sk_xprt);
- } else {
+ return len;
+ }
+error:
+ if (len != -EAGAIN) {
printk(KERN_NOTICE "%s: recvfrom returned errno %d\n",
svsk->sk_xprt.xpt_server->sv_name, -len);
- goto err_delete;
+ set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
}
-
- return len;
+ return -EAGAIN;
}
/*
* Send out data on TCP socket.
*/
-static int
-svc_tcp_sendto(struct svc_rqst *rqstp)
+static int svc_tcp_sendto(struct svc_rqst *rqstp)
{
struct xdr_buf *xbufp = &rqstp->rq_res;
int sent;
reclen = htonl(0x80000000|((xbufp->len ) - 4));
memcpy(xbufp->head[0].iov_base, &reclen, 4);
- if (test_bit(XPT_DEAD, &rqstp->rq_sock->sk_xprt.xpt_flags))
+ if (test_bit(XPT_DEAD, &rqstp->rq_xprt->xpt_flags))
return -ENOTCONN;
sent = svc_sendto(rqstp, &rqstp->rq_res);
if (sent != xbufp->len) {
- printk(KERN_NOTICE "rpc-srv/tcp: %s: %s %d when sending %d bytes - shutting down socket\n",
- rqstp->rq_sock->sk_xprt.xpt_server->sv_name,
+ printk(KERN_NOTICE
+ "rpc-srv/tcp: %s: %s %d when sending %d bytes "
+ "- shutting down socket\n",
+ rqstp->rq_xprt->xpt_server->sv_name,
(sent<0)?"got error":"sent only",
sent, xbufp->len);
- set_bit(XPT_CLOSE, &rqstp->rq_sock->sk_xprt.xpt_flags);
+ set_bit(XPT_CLOSE, &rqstp->rq_xprt->xpt_flags);
svc_xprt_enqueue(rqstp->rq_xprt);
sent = -EAGAIN;
}
static int svc_tcp_has_wspace(struct svc_xprt *xprt)
{
- struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
- struct svc_serv *serv = svsk->sk_xprt.xpt_server;
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
+ struct svc_serv *serv = svsk->sk_xprt.xpt_server;
int required;
- int wspace;
- /*
- * Set the SOCK_NOSPACE flag before checking the available
- * sock space.
- */
+ if (test_bit(XPT_LISTENER, &xprt->xpt_flags))
+ return 1;
+ required = atomic_read(&xprt->xpt_reserved) + serv->sv_max_mesg;
+ if (sk_stream_wspace(svsk->sk_sk) >= required)
+ return 1;
set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
- required = atomic_read(&svsk->sk_xprt.xpt_reserved) + serv->sv_max_mesg;
- wspace = sk_stream_wspace(svsk->sk_sk);
-
- if (wspace < sk_stream_min_wspace(svsk->sk_sk))
- return 0;
- if (required * 2 > wspace)
- return 0;
-
- clear_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
- return 1;
+ return 0;
}
static struct svc_xprt *svc_tcp_create(struct svc_serv *serv,
.xpo_recvfrom = svc_tcp_recvfrom,
.xpo_sendto = svc_tcp_sendto,
.xpo_release_rqst = svc_release_skb,
- .xpo_detach = svc_sock_detach,
+ .xpo_detach = svc_tcp_sock_detach,
.xpo_free = svc_sock_free,
.xpo_prep_reply_hdr = svc_tcp_prep_reply_hdr,
.xpo_has_wspace = svc_tcp_has_wspace,
static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv)
{
struct sock *sk = svsk->sk_sk;
- struct tcp_sock *tp = tcp_sk(sk);
svc_xprt_init(&svc_tcp_class, &svsk->sk_xprt, serv);
-
+ set_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags);
if (sk->sk_state == TCP_LISTEN) {
dprintk("setting up TCP socket for listening\n");
set_bit(XPT_LISTENER, &svsk->sk_xprt.xpt_flags);
dprintk("setting up TCP socket for reading\n");
sk->sk_state_change = svc_tcp_state_change;
sk->sk_data_ready = svc_tcp_data_ready;
- sk->sk_write_space = svc_write_space;
+ sk->sk_write_space = svc_tcp_write_space;
svsk->sk_reclen = 0;
svsk->sk_tcplen = 0;
- tp->nonagle = 1; /* disable Nagle's algorithm */
+ tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF;
/* initialise setting must have enough space to
* receive and respond to one request.
}
}
-void
-svc_sock_update_bufs(struct svc_serv *serv)
+void svc_sock_update_bufs(struct svc_serv *serv)
{
/*
* The number of server threads has changed. Update
}
spin_unlock_bh(&serv->sv_lock);
}
-
-/*
- * Make sure that we don't have too many active connections. If we
- * have, something must be dropped.
- *
- * There's no point in trying to do random drop here for DoS
- * prevention. The NFS clients does 1 reconnect in 15 seconds. An
- * attacker can easily beat that.
- *
- * The only somewhat efficient mechanism would be if drop old
- * connections from the same IP first. But right now we don't even
- * record the client IP in svc_sock.
- */
-static void svc_check_conn_limits(struct svc_serv *serv)
-{
- if (serv->sv_tmpcnt > (serv->sv_nrthreads+3)*20) {
- struct svc_sock *svsk = NULL;
- spin_lock_bh(&serv->sv_lock);
- if (!list_empty(&serv->sv_tempsocks)) {
- if (net_ratelimit()) {
- /* Try to help the admin */
- printk(KERN_NOTICE "%s: too many open TCP "
- "sockets, consider increasing the "
- "number of nfsd threads\n",
- serv->sv_name);
- }
- /*
- * Always select the oldest socket. It's not fair,
- * but so is life
- */
- svsk = list_entry(serv->sv_tempsocks.prev,
- struct svc_sock,
- sk_xprt.xpt_list);
- set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
- svc_xprt_get(&svsk->sk_xprt);
- }
- spin_unlock_bh(&serv->sv_lock);
-
- if (svsk) {
- svc_xprt_enqueue(&svsk->sk_xprt);
- svc_xprt_put(&svsk->sk_xprt);
- }
- }
-}
-
-/*
- * Receive the next request on any socket. This code is carefully
- * organised not to touch any cachelines in the shared svc_serv
- * structure, only cachelines in the local svc_pool.
- */
-int
-svc_recv(struct svc_rqst *rqstp, long timeout)
-{
- struct svc_sock *svsk = NULL;
- struct svc_serv *serv = rqstp->rq_server;
- struct svc_pool *pool = rqstp->rq_pool;
- int len, i;
- int pages;
- struct xdr_buf *arg;
- DECLARE_WAITQUEUE(wait, current);
-
- dprintk("svc: server %p waiting for data (to = %ld)\n",
- rqstp, timeout);
-
- if (rqstp->rq_sock)
- printk(KERN_ERR
- "svc_recv: service %p, socket not NULL!\n",
- rqstp);
- if (waitqueue_active(&rqstp->rq_wait))
- printk(KERN_ERR
- "svc_recv: service %p, wait queue active!\n",
- rqstp);
-
-
- /* now allocate needed pages. If we get a failure, sleep briefly */
- pages = (serv->sv_max_mesg + PAGE_SIZE) / PAGE_SIZE;
- for (i=0; i < pages ; i++)
- while (rqstp->rq_pages[i] == NULL) {
- struct page *p = alloc_page(GFP_KERNEL);
- if (!p)
- schedule_timeout_uninterruptible(msecs_to_jiffies(500));
- rqstp->rq_pages[i] = p;
- }
- rqstp->rq_pages[i++] = NULL; /* this might be seen in nfs_read_actor */
- BUG_ON(pages >= RPCSVC_MAXPAGES);
-
- /* Make arg->head point to first page and arg->pages point to rest */
- arg = &rqstp->rq_arg;
- arg->head[0].iov_base = page_address(rqstp->rq_pages[0]);
- arg->head[0].iov_len = PAGE_SIZE;
- arg->pages = rqstp->rq_pages + 1;
- arg->page_base = 0;
- /* save at least one page for response */
- arg->page_len = (pages-2)*PAGE_SIZE;
- arg->len = (pages-1)*PAGE_SIZE;
- arg->tail[0].iov_len = 0;
-
- try_to_freeze();
- cond_resched();
- if (signalled())
- return -EINTR;
-
- spin_lock_bh(&pool->sp_lock);
- if ((svsk = svc_sock_dequeue(pool)) != NULL) {
- rqstp->rq_sock = svsk;
- svc_xprt_get(&svsk->sk_xprt);
- rqstp->rq_reserved = serv->sv_max_mesg;
- atomic_add(rqstp->rq_reserved, &svsk->sk_xprt.xpt_reserved);
- } else {
- /* No data pending. Go to sleep */
- svc_thread_enqueue(pool, rqstp);
-
- /*
- * We have to be able to interrupt this wait
- * to bring down the daemons ...
- */
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&rqstp->rq_wait, &wait);
- spin_unlock_bh(&pool->sp_lock);
-
- schedule_timeout(timeout);
-
- try_to_freeze();
-
- spin_lock_bh(&pool->sp_lock);
- remove_wait_queue(&rqstp->rq_wait, &wait);
-
- if (!(svsk = rqstp->rq_sock)) {
- svc_thread_dequeue(pool, rqstp);
- spin_unlock_bh(&pool->sp_lock);
- dprintk("svc: server %p, no data yet\n", rqstp);
- return signalled()? -EINTR : -EAGAIN;
- }
- }
- spin_unlock_bh(&pool->sp_lock);
-
- len = 0;
- if (test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags)) {
- dprintk("svc_recv: found XPT_CLOSE\n");
- svc_delete_xprt(&svsk->sk_xprt);
- } else if (test_bit(XPT_LISTENER, &svsk->sk_xprt.xpt_flags)) {
- struct svc_xprt *newxpt;
- newxpt = svsk->sk_xprt.xpt_ops->xpo_accept(&svsk->sk_xprt);
- if (newxpt) {
- /*
- * We know this module_get will succeed because the
- * listener holds a reference too
- */
- __module_get(newxpt->xpt_class->xcl_owner);
- svc_check_conn_limits(svsk->sk_xprt.xpt_server);
- svc_xprt_received(newxpt);
- }
- svc_xprt_received(&svsk->sk_xprt);
- } else {
- dprintk("svc: server %p, pool %u, socket %p, inuse=%d\n",
- rqstp, pool->sp_id, svsk,
- atomic_read(&svsk->sk_xprt.xpt_ref.refcount));
- len = svsk->sk_xprt.xpt_ops->xpo_recvfrom(rqstp);
- dprintk("svc: got len=%d\n", len);
- }
-
- /* No data, incomplete (TCP) read, or accept() */
- if (len == 0 || len == -EAGAIN) {
- rqstp->rq_res.len = 0;
- svc_sock_release(rqstp);
- return -EAGAIN;
- }
- clear_bit(XPT_OLD, &svsk->sk_xprt.xpt_flags);
-
- rqstp->rq_secure = svc_port_is_privileged(svc_addr(rqstp));
- rqstp->rq_chandle.defer = svc_defer;
-
- if (serv->sv_stats)
- serv->sv_stats->netcnt++;
- return len;
-}
-
-/*
- * Drop request
- */
-void
-svc_drop(struct svc_rqst *rqstp)
-{
- dprintk("svc: socket %p dropped request\n", rqstp->rq_sock);
- svc_sock_release(rqstp);
-}
-
-/*
- * Return reply to client.
- */
-int
-svc_send(struct svc_rqst *rqstp)
-{
- struct svc_xprt *xprt;
- int len;
- struct xdr_buf *xb;
-
- xprt = rqstp->rq_xprt;
- if (!xprt)
- return -EFAULT;
-
- /* release the receive skb before sending the reply */
- rqstp->rq_xprt->xpt_ops->xpo_release_rqst(rqstp);
-
- /* calculate over-all length */
- xb = & rqstp->rq_res;
- xb->len = xb->head[0].iov_len +
- xb->page_len +
- xb->tail[0].iov_len;
-
- /* Grab mutex to serialize outgoing data. */
- mutex_lock(&xprt->xpt_mutex);
- if (test_bit(XPT_DEAD, &xprt->xpt_flags))
- len = -ENOTCONN;
- else
- len = xprt->xpt_ops->xpo_sendto(rqstp);
- mutex_unlock(&xprt->xpt_mutex);
- svc_sock_release(rqstp);
-
- if (len == -ECONNREFUSED || len == -ENOTCONN || len == -EAGAIN)
- return 0;
- return len;
-}
-
-/*
- * Timer function to close old temporary sockets, using
- * a mark-and-sweep algorithm.
- */
-static void
-svc_age_temp_sockets(unsigned long closure)
-{
- struct svc_serv *serv = (struct svc_serv *)closure;
- struct svc_sock *svsk;
- struct list_head *le, *next;
- LIST_HEAD(to_be_aged);
-
- dprintk("svc_age_temp_sockets\n");
-
- if (!spin_trylock_bh(&serv->sv_lock)) {
- /* busy, try again 1 sec later */
- dprintk("svc_age_temp_sockets: busy\n");
- mod_timer(&serv->sv_temptimer, jiffies + HZ);
- return;
- }
-
- list_for_each_safe(le, next, &serv->sv_tempsocks) {
- svsk = list_entry(le, struct svc_sock, sk_xprt.xpt_list);
-
- if (!test_and_set_bit(XPT_OLD, &svsk->sk_xprt.xpt_flags))
- continue;
- if (atomic_read(&svsk->sk_xprt.xpt_ref.refcount) > 1
- || test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags))
- continue;
- svc_xprt_get(&svsk->sk_xprt);
- list_move(le, &to_be_aged);
- set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
- set_bit(XPT_DETACHED, &svsk->sk_xprt.xpt_flags);
- }
- spin_unlock_bh(&serv->sv_lock);
-
- while (!list_empty(&to_be_aged)) {
- le = to_be_aged.next;
- /* fiddling the sk_xprt.xpt_list node is safe 'cos we're XPT_DETACHED */
- list_del_init(le);
- svsk = list_entry(le, struct svc_sock, sk_xprt.xpt_list);
-
- dprintk("queuing svsk %p for closing\n", svsk);
-
- /* a thread will dequeue and close it soon */
- svc_xprt_enqueue(&svsk->sk_xprt);
- svc_xprt_put(&svsk->sk_xprt);
- }
-
- mod_timer(&serv->sv_temptimer, jiffies + svc_conn_age_period * HZ);
-}
+EXPORT_SYMBOL_GPL(svc_sock_update_bufs);
/*
* Initialize socket for RPC use and create svc_sock struct
struct svc_sock *svsk;
struct sock *inet;
int pmap_register = !(flags & SVC_SOCK_ANONYMOUS);
- int is_temporary = flags & SVC_SOCK_TEMPORARY;
dprintk("svc: svc_setup_socket %p\n", sock);
if (!(svsk = kzalloc(sizeof(*svsk), GFP_KERNEL))) {
/* Register socket with portmapper */
if (*errp >= 0 && pmap_register)
- *errp = svc_register(serv, inet->sk_protocol,
- ntohs(inet_sk(inet)->sport));
+ *errp = svc_register(serv, inet->sk_family, inet->sk_protocol,
+ ntohs(inet_sk(inet)->inet_sport));
if (*errp < 0) {
kfree(svsk);
return NULL;
}
- set_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags);
inet->sk_user_data = svsk;
svsk->sk_sock = sock;
svsk->sk_sk = inet;
svsk->sk_ostate = inet->sk_state_change;
svsk->sk_odata = inet->sk_data_ready;
svsk->sk_owspace = inet->sk_write_space;
- spin_lock_init(&svsk->sk_lock);
- INIT_LIST_HEAD(&svsk->sk_deferred);
/* Initialize the socket */
if (sock->type == SOCK_DGRAM)
else
svc_tcp_init(svsk, serv);
- spin_lock_bh(&serv->sv_lock);
- if (is_temporary) {
- set_bit(XPT_TEMP, &svsk->sk_xprt.xpt_flags);
- list_add(&svsk->sk_xprt.xpt_list, &serv->sv_tempsocks);
- serv->sv_tmpcnt++;
- if (serv->sv_temptimer.function == NULL) {
- /* setup timer to age temp sockets */
- setup_timer(&serv->sv_temptimer, svc_age_temp_sockets,
- (unsigned long)serv);
- mod_timer(&serv->sv_temptimer,
- jiffies + svc_conn_age_period * HZ);
- }
- } else {
- clear_bit(XPT_TEMP, &svsk->sk_xprt.xpt_flags);
- list_add(&svsk->sk_xprt.xpt_list, &serv->sv_permsocks);
- }
- spin_unlock_bh(&serv->sv_lock);
-
dprintk("svc: svc_setup_socket created %p (inet %p)\n",
svsk, svsk->sk_sk);
return svsk;
}
-int svc_addsock(struct svc_serv *serv,
- int fd,
- char *name_return,
- int *proto)
+/**
+ * svc_addsock - add a listener socket to an RPC service
+ * @serv: pointer to RPC service to which to add a new listener
+ * @fd: file descriptor of the new listener
+ * @name_return: pointer to buffer to fill in with name of listener
+ * @len: size of the buffer
+ *
+ * Fills in socket name and returns positive length of name if successful.
+ * Name is terminated with '\n'. On error, returns a negative errno
+ * value.
+ */
+int svc_addsock(struct svc_serv *serv, const int fd, char *name_return,
+ const size_t len)
{
int err = 0;
struct socket *so = sockfd_lookup(fd, &err);
if (!so)
return err;
- if (so->sk->sk_family != AF_INET)
+ if ((so->sk->sk_family != PF_INET) && (so->sk->sk_family != PF_INET6))
err = -EAFNOSUPPORT;
else if (so->sk->sk_protocol != IPPROTO_TCP &&
so->sk->sk_protocol != IPPROTO_UDP)
else if (so->state > SS_UNCONNECTED)
err = -EISCONN;
else {
- svsk = svc_setup_socket(serv, so, &err, SVC_SOCK_DEFAULTS);
+ if (!try_module_get(THIS_MODULE))
+ err = -ENOENT;
+ else
+ svsk = svc_setup_socket(serv, so, &err,
+ SVC_SOCK_DEFAULTS);
if (svsk) {
+ struct sockaddr_storage addr;
+ struct sockaddr *sin = (struct sockaddr *)&addr;
+ int salen;
+ if (kernel_getsockname(svsk->sk_sock, sin, &salen) == 0)
+ svc_xprt_set_local(&svsk->sk_xprt, sin, salen);
+ clear_bit(XPT_TEMP, &svsk->sk_xprt.xpt_flags);
+ spin_lock_bh(&serv->sv_lock);
+ list_add(&svsk->sk_xprt.xpt_list, &serv->sv_permsocks);
+ spin_unlock_bh(&serv->sv_lock);
svc_xprt_received(&svsk->sk_xprt);
err = 0;
- }
+ } else
+ module_put(THIS_MODULE);
}
if (err) {
sockfd_put(so);
return err;
}
- if (proto) *proto = so->sk->sk_protocol;
- return one_sock_name(name_return, svsk);
+ return svc_one_sock_name(svsk, name_return, len);
}
EXPORT_SYMBOL_GPL(svc_addsock);
struct socket *sock;
int error;
int type;
- char buf[RPC_MAX_ADDRBUFLEN];
+ 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",
serv->sv_program->pg_name, protocol,
"sockets supported\n");
return ERR_PTR(-EINVAL);
}
+
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(sin->sa_family, type, protocol, &sock);
+ 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);
if (error < 0)
goto bummer;
+ newlen = len;
+ error = kernel_getsockname(sock, newsin, &newlen);
+ if (error < 0)
+ goto bummer;
+
if (protocol == IPPROTO_TCP) {
if ((error = kernel_listen(sock, 64)) < 0)
goto bummer;
}
if ((svsk = svc_setup_socket(serv, sock, &error, flags)) != NULL) {
- svc_xprt_received(&svsk->sk_xprt);
+ svc_xprt_set_local(&svsk->sk_xprt, newsin, newlen);
return (struct svc_xprt *)svsk;
}
sk->sk_state_change = svsk->sk_ostate;
sk->sk_data_ready = svsk->sk_odata;
sk->sk_write_space = svsk->sk_owspace;
+
+ if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
+ wake_up_interruptible(sk_sleep(sk));
+}
+
+/*
+ * Disconnect the socket, and reset the callbacks
+ */
+static void svc_tcp_sock_detach(struct svc_xprt *xprt)
+{
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
+
+ dprintk("svc: svc_tcp_sock_detach(%p)\n", svsk);
+
+ svc_sock_detach(xprt);
+
+ if (!test_bit(XPT_LISTENER, &xprt->xpt_flags))
+ kernel_sock_shutdown(svsk->sk_sock, SHUT_RDWR);
}
/*
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
dprintk("svc: svc_sock_free(%p)\n", svsk);
- if (svsk->sk_info_authunix != NULL)
- svcauth_unix_info_release(svsk->sk_info_authunix);
if (svsk->sk_sock->file)
sockfd_put(svsk->sk_sock);
else
}
/*
- * Remove a dead transport
- */
-static void svc_delete_xprt(struct svc_xprt *xprt)
-{
- struct svc_serv *serv = xprt->xpt_server;
-
- dprintk("svc: svc_delete_xprt(%p)\n", xprt);
- xprt->xpt_ops->xpo_detach(xprt);
-
- spin_lock_bh(&serv->sv_lock);
- if (!test_and_set_bit(XPT_DETACHED, &xprt->xpt_flags))
- list_del_init(&xprt->xpt_list);
- /*
- * We used to delete the transport from whichever list
- * it's sk_xprt.xpt_ready node was on, but we don't actually
- * need to. This is because the only time we're called
- * while still attached to a queue, the queue itself
- * is about to be destroyed (in svc_destroy).
- */
- if (!test_and_set_bit(XPT_DEAD, &xprt->xpt_flags)) {
- BUG_ON(atomic_read(&xprt->xpt_ref.refcount) < 2);
- if (test_bit(XPT_TEMP, &xprt->xpt_flags))
- serv->sv_tmpcnt--;
- svc_xprt_put(xprt);
- }
- spin_unlock_bh(&serv->sv_lock);
-}
-
-static void svc_close_xprt(struct svc_xprt *xprt)
-{
- set_bit(XPT_CLOSE, &xprt->xpt_flags);
- if (test_and_set_bit(XPT_BUSY, &xprt->xpt_flags))
- /* someone else will have to effect the close */
- return;
-
- svc_xprt_get(xprt);
- svc_delete_xprt(xprt);
- clear_bit(XPT_BUSY, &xprt->xpt_flags);
- svc_xprt_put(xprt);
-}
-
-void svc_close_all(struct list_head *xprt_list)
-{
- struct svc_xprt *xprt;
- struct svc_xprt *tmp;
-
- list_for_each_entry_safe(xprt, tmp, xprt_list, xpt_list) {
- set_bit(XPT_CLOSE, &xprt->xpt_flags);
- if (test_bit(XPT_BUSY, &xprt->xpt_flags)) {
- /* Waiting to be processed, but no threads left,
- * So just remove it from the waiting list
- */
- list_del_init(&xprt->xpt_ready);
- clear_bit(XPT_BUSY, &xprt->xpt_flags);
- }
- svc_close_xprt(xprt);
- }
-}
-
-/*
- * Handle defer and revisit of requests
+ * Create a svc_xprt.
+ *
+ * For internal use only (e.g. nfsv4.1 backchannel).
+ * Callers should typically use the xpo_create() method.
*/
-
-static void svc_revisit(struct cache_deferred_req *dreq, int too_many)
+struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot)
{
- struct svc_deferred_req *dr = container_of(dreq, struct svc_deferred_req, handle);
struct svc_sock *svsk;
+ struct svc_xprt *xprt = NULL;
- if (too_many) {
- svc_xprt_put(&dr->svsk->sk_xprt);
- kfree(dr);
- return;
- }
- dprintk("revisit queued\n");
- svsk = dr->svsk;
- dr->svsk = NULL;
- spin_lock(&svsk->sk_lock);
- list_add(&dr->handle.recent, &svsk->sk_deferred);
- spin_unlock(&svsk->sk_lock);
- set_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
- svc_xprt_enqueue(&svsk->sk_xprt);
- svc_xprt_put(&svsk->sk_xprt);
-}
-
-static struct cache_deferred_req *
-svc_defer(struct cache_req *req)
-{
- struct svc_rqst *rqstp = container_of(req, struct svc_rqst, rq_chandle);
- int size = sizeof(struct svc_deferred_req) + (rqstp->rq_arg.len);
- struct svc_deferred_req *dr;
-
- if (rqstp->rq_arg.page_len)
- return NULL; /* if more than a page, give up FIXME */
- if (rqstp->rq_deferred) {
- dr = rqstp->rq_deferred;
- rqstp->rq_deferred = NULL;
- } else {
- int skip = rqstp->rq_arg.len - rqstp->rq_arg.head[0].iov_len;
- /* FIXME maybe discard if size too large */
- dr = kmalloc(size, GFP_KERNEL);
- if (dr == NULL)
- return NULL;
-
- dr->handle.owner = rqstp->rq_server;
- dr->prot = rqstp->rq_prot;
- memcpy(&dr->addr, &rqstp->rq_addr, rqstp->rq_addrlen);
- dr->addrlen = rqstp->rq_addrlen;
- dr->daddr = rqstp->rq_daddr;
- dr->argslen = rqstp->rq_arg.len >> 2;
- memcpy(dr->args, rqstp->rq_arg.head[0].iov_base-skip, dr->argslen<<2);
- }
- svc_xprt_get(rqstp->rq_xprt);
- dr->svsk = rqstp->rq_sock;
+ dprintk("svc: %s\n", __func__);
+ svsk = kzalloc(sizeof(*svsk), GFP_KERNEL);
+ if (!svsk)
+ goto out;
- dr->handle.revisit = svc_revisit;
- return &dr->handle;
+ xprt = &svsk->sk_xprt;
+ if (prot == IPPROTO_TCP)
+ svc_xprt_init(&svc_tcp_class, xprt, serv);
+ else if (prot == IPPROTO_UDP)
+ svc_xprt_init(&svc_udp_class, xprt, serv);
+ else
+ BUG();
+out:
+ dprintk("svc: %s return %p\n", __func__, xprt);
+ return xprt;
}
+EXPORT_SYMBOL_GPL(svc_sock_create);
/*
- * recv data from a deferred request into an active one
+ * Destroy a svc_sock.
*/
-static int svc_deferred_recv(struct svc_rqst *rqstp)
+void svc_sock_destroy(struct svc_xprt *xprt)
{
- struct svc_deferred_req *dr = rqstp->rq_deferred;
-
- rqstp->rq_arg.head[0].iov_base = dr->args;
- rqstp->rq_arg.head[0].iov_len = dr->argslen<<2;
- rqstp->rq_arg.page_len = 0;
- rqstp->rq_arg.len = dr->argslen<<2;
- rqstp->rq_prot = dr->prot;
- memcpy(&rqstp->rq_addr, &dr->addr, dr->addrlen);
- rqstp->rq_addrlen = dr->addrlen;
- rqstp->rq_daddr = dr->daddr;
- rqstp->rq_respages = rqstp->rq_pages;
- return dr->argslen<<2;
-}
-
-
-static struct svc_deferred_req *svc_deferred_dequeue(struct svc_sock *svsk)
-{
- struct svc_deferred_req *dr = NULL;
-
- if (!test_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags))
- return NULL;
- spin_lock(&svsk->sk_lock);
- clear_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
- if (!list_empty(&svsk->sk_deferred)) {
- dr = list_entry(svsk->sk_deferred.next,
- struct svc_deferred_req,
- handle.recent);
- list_del_init(&dr->handle.recent);
- set_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
- }
- spin_unlock(&svsk->sk_lock);
- return dr;
+ if (xprt)
+ kfree(container_of(xprt, struct svc_sock, sk_xprt));
}
+EXPORT_SYMBOL_GPL(svc_sock_destroy);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff