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Diffstat (limited to 'net/sunrpc/svcsock.c')
-rw-r--r--net/sunrpc/svcsock.c1311
1 files changed, 316 insertions, 995 deletions
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index c75bffeb89e..1d3e5fcc2cc 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -5,7 +5,7 @@
*
* The server scheduling algorithm does not always distribute the load
* evenly when servicing a single client. May need to modify the
- * svc_sock_enqueue procedure...
+ * svc_xprt_enqueue procedure...
*
* TCP support is largely untested and may be a little slow. The problem
* is that we currently do two separate recvfrom's, one for the 4-byte
@@ -48,72 +48,40 @@
#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_flags.SK_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:
- *
- * SK_CONN, SK_DATA, can be set or cleared at any time.
- * after a set, svc_sock_enqueue must be called.
- * after a clear, the socket must be read/accepted
- * if this succeeds, it must be set again.
- * SK_CLOSE can set at any time. It is never cleared.
- * sk_inuse contains a bias of '1' until SK_DEAD is set.
- * so when sk_inuse hits zero, we know the socket is dead
- * and no-one is using it.
- * SK_DEAD can only be set while SK_BUSY is held which ensures
- * no other thread will be using the socket or will try to
- * set SK_DEAD.
- *
- */
-
-#define RPCDBG_FACILITY RPCDBG_SVCSOCK
+#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_socket(struct svc_sock *svsk);
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_socket(struct svc_sock *svsk);
-
-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);
-
-/* 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;
+static void svc_sock_detach(struct svc_xprt *);
+static void svc_sock_free(struct svc_xprt *);
+static struct svc_xprt *svc_create_socket(struct svc_serv *, int,
+ struct sockaddr *, int, int);
#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:
@@ -121,81 +89,26 @@ static inline void svc_reclassify_socket(struct socket *sock)
}
}
#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 inline void
-svc_release_skb(struct svc_rqst *rqstp)
+static void svc_release_skb(struct svc_rqst *rqstp)
{
- struct sk_buff *skb = rqstp->rq_skbuff;
+ struct sk_buff *skb = rqstp->rq_xprt_ctxt;
struct svc_deferred_req *dr = rqstp->rq_deferred;
if (skb) {
- rqstp->rq_skbuff = NULL;
+ 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);
+ skb_free_datagram(svsk->sk_sk, skb);
}
if (dr) {
rqstp->rq_deferred = NULL;
@@ -203,253 +116,6 @@ svc_release_skb(struct svc_rqst *rqstp)
}
}
-/*
- * Any space to write?
- */
-static inline unsigned long
-svc_sock_wspace(struct svc_sock *svsk)
-{
- int wspace;
-
- if (svsk->sk_sock->type == SOCK_STREAM)
- wspace = sk_stream_wspace(svsk->sk_sk);
- else
- wspace = sock_wspace(svsk->sk_sk);
-
- return wspace;
-}
-
-/*
- * Queue up a socket with data pending. If there are idle nfsd
- * processes, wake 'em up.
- *
- */
-static void
-svc_sock_enqueue(struct svc_sock *svsk)
-{
- struct svc_serv *serv = svsk->sk_server;
- struct svc_pool *pool;
- struct svc_rqst *rqstp;
- int cpu;
-
- if (!(svsk->sk_flags &
- ( (1<<SK_CONN)|(1<<SK_DATA)|(1<<SK_CLOSE)|(1<<SK_DEFERRED)) ))
- return;
- if (test_bit(SK_DEAD, &svsk->sk_flags))
- return;
-
- cpu = get_cpu();
- pool = svc_pool_for_cpu(svsk->sk_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_sock_enqueue: threads and sockets both waiting??\n");
-
- if (test_bit(SK_DEAD, &svsk->sk_flags)) {
- /* Don't enqueue dead sockets */
- dprintk("svc: socket %p is dead, not enqueued\n", svsk->sk_sk);
- 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 SK_BUSY atomically because
- * it also guards against trying to enqueue the svc_sock twice.
- */
- if (test_and_set_bit(SK_BUSY, &svsk->sk_flags)) {
- /* Don't enqueue socket while already enqueued */
- dprintk("svc: socket %p busy, not enqueued\n", svsk->sk_sk);
- goto out_unlock;
- }
- BUG_ON(svsk->sk_pool != NULL);
- svsk->sk_pool = pool;
-
- set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
- if (((atomic_read(&svsk->sk_reserved) + serv->sv_max_mesg)*2
- > svc_sock_wspace(svsk))
- && !test_bit(SK_CLOSE, &svsk->sk_flags)
- && !test_bit(SK_CONN, &svsk->sk_flags)) {
- /* Don't enqueue while not enough space for reply */
- dprintk("svc: socket %p no space, %d*2 > %ld, not enqueued\n",
- svsk->sk_sk, atomic_read(&svsk->sk_reserved)+serv->sv_max_mesg,
- svc_sock_wspace(svsk));
- svsk->sk_pool = NULL;
- clear_bit(SK_BUSY, &svsk->sk_flags);
- goto out_unlock;
- }
- clear_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
-
-
- if (!list_empty(&pool->sp_threads)) {
- rqstp = list_entry(pool->sp_threads.next,
- struct svc_rqst,
- rq_list);
- dprintk("svc: socket %p served by daemon %p\n",
- svsk->sk_sk, rqstp);
- svc_thread_dequeue(pool, rqstp);
- if (rqstp->rq_sock)
- printk(KERN_ERR
- "svc_sock_enqueue: server %p, rq_sock=%p!\n",
- rqstp, rqstp->rq_sock);
- rqstp->rq_sock = svsk;
- atomic_inc(&svsk->sk_inuse);
- rqstp->rq_reserved = serv->sv_max_mesg;
- atomic_add(rqstp->rq_reserved, &svsk->sk_reserved);
- BUG_ON(svsk->sk_pool != pool);
- wake_up(&rqstp->rq_wait);
- } else {
- dprintk("svc: socket %p put into queue\n", svsk->sk_sk);
- list_add_tail(&svsk->sk_ready, &pool->sp_sockets);
- BUG_ON(svsk->sk_pool != pool);
- }
-
-out_unlock:
- spin_unlock_bh(&pool->sp_lock);
-}
-
-/*
- * 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_ready);
- list_del_init(&svsk->sk_ready);
-
- dprintk("svc: socket %p dequeued, inuse=%d\n",
- svsk->sk_sk, atomic_read(&svsk->sk_inuse));
-
- return svsk;
-}
-
-/*
- * Having read something from a socket, check whether it
- * needs to be re-enqueued.
- * Note: SK_DATA only gets cleared when a read-attempt finds
- * no (or insufficient) data.
- */
-static inline void
-svc_sock_received(struct svc_sock *svsk)
-{
- svsk->sk_pool = NULL;
- clear_bit(SK_BUSY, &svsk->sk_flags);
- svc_sock_enqueue(svsk);
-}
-
-
-/**
- * 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_sock *svsk = rqstp->rq_sock;
- atomic_sub((rqstp->rq_reserved - space), &svsk->sk_reserved);
- rqstp->rq_reserved = space;
-
- svc_sock_enqueue(svsk);
- }
-}
-
-/*
- * Release a socket after use.
- */
-static inline void
-svc_sock_put(struct svc_sock *svsk)
-{
- if (atomic_dec_and_test(&svsk->sk_inuse)) {
- BUG_ON(! test_bit(SK_DEAD, &svsk->sk_flags));
-
- dprintk("svc: releasing dead socket\n");
- if (svsk->sk_sock->file)
- sockfd_put(svsk->sk_sock);
- else
- sock_release(svsk->sk_sock);
- if (svsk->sk_info_authunix != NULL)
- svcauth_unix_info_release(svsk->sk_info_authunix);
- kfree(svsk);
- }
-}
-
-static void
-svc_sock_release(struct svc_rqst *rqstp)
-{
- struct svc_sock *svsk = rqstp->rq_sock;
-
- svc_release_skb(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_sock_put(svsk);
-}
-
-/*
- * 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);
- }
-}
-
union svc_pktinfo_u {
struct in_pktinfo pkti;
struct in6_pktinfo pkti6;
@@ -459,7 +125,9 @@ union svc_pktinfo_u {
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);
@@ -489,10 +157,10 @@ static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh)
/*
* Generic sendto routine
*/
-static int
-svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
+static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
{
- struct svc_sock *svsk = rqstp->rq_sock;
+ struct svc_sock *svsk =
+ container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
struct socket *sock = svsk->sk_sock;
int slen;
union {
@@ -565,7 +233,7 @@ svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
}
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;
@@ -602,7 +270,7 @@ svc_sock_names(char *buf, struct svc_serv *serv, char *toclose)
if (!serv)
return 0;
spin_lock_bh(&serv->sv_lock);
- list_for_each_entry(svsk, &serv->sv_permsocks, sk_list) {
+ 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)
closesk = svsk;
@@ -614,7 +282,7 @@ svc_sock_names(char *buf, struct svc_serv *serv, char *toclose)
/* Should unregister with portmap, but you cannot
* unregister just one protocol...
*/
- svc_close_socket(closesk);
+ svc_close_xprt(&closesk->sk_xprt);
else if (toclose)
return -ENOENT;
return len;
@@ -624,8 +292,7 @@ EXPORT_SYMBOL(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;
@@ -638,48 +305,31 @@ svc_recv_available(struct svc_sock *svsk)
/*
* 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;
@@ -704,16 +354,16 @@ svc_sock_setbufsize(struct socket *sock, unsigned int snd, unsigned int rcv)
/*
* 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;
if (svsk) {
dprintk("svc: socket %p(inet %p), count=%d, busy=%d\n",
- svsk, sk, count, test_bit(SK_BUSY, &svsk->sk_flags));
- set_bit(SK_DATA, &svsk->sk_flags);
- svc_sock_enqueue(svsk);
+ svsk, sk, count,
+ test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags));
+ 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);
@@ -722,15 +372,14 @@ svc_udp_data_ready(struct sock *sk, int count)
/*
* 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);
if (svsk) {
dprintk("svc: socket %p(inet %p), write_space busy=%d\n",
- svsk, sk, test_bit(SK_BUSY, &svsk->sk_flags));
- svc_sock_enqueue(svsk);
+ svsk, sk, test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags));
+ svc_xprt_enqueue(&svsk->sk_xprt);
}
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) {
@@ -740,10 +389,19 @@ svc_write_space(struct sock *sk)
}
}
-static inline void svc_udp_get_dest_address(struct svc_rqst *rqstp,
- struct cmsghdr *cmh)
+/*
+ * 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 void svc_udp_get_dest_address(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);
rqstp->rq_daddr.addr.s_addr = pki->ipi_spec_dst.s_addr;
@@ -760,11 +418,11 @@ static inline void svc_udp_get_dest_address(struct svc_rqst *rqstp,
/*
* 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_serv *serv = svsk->sk_server;
+ 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 {
struct cmsghdr hdr;
@@ -779,7 +437,7 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
.msg_flags = MSG_DONTWAIT,
};
- if (test_and_clear_bit(SK_CHNGBUF, &svsk->sk_flags))
+ if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags))
/* udp sockets need large rcvbuf as all pending
* requests are still in that buffer. sndbuf must
* also be large enough that there is enough space
@@ -792,17 +450,7 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
(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_sock_received(svsk);
- return svc_deferred_recv(rqstp);
- }
-
- if (test_bit(SK_CLOSE, &svsk->sk_flags)) {
- svc_delete_socket(svsk);
- return 0;
- }
-
- clear_bit(SK_DATA, &svsk->sk_flags);
+ clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
skb = NULL;
err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
0, 0, MSG_PEEK | MSG_DONTWAIT);
@@ -813,24 +461,27 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
if (err != -EAGAIN) {
/* possibly an icmp error */
dprintk("svc: recvfrom returned error %d\n", -err);
- set_bit(SK_DATA, &svsk->sk_flags);
+ set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
}
- svc_sock_received(svsk);
+ 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 len;
+ rqstp->rq_addrlen = len;
if (skb->tstamp.tv64 == 0) {
skb->tstamp = ktime_get_real();
/* Don't enable netstamp, sunrpc doesn't
need that much accuracy */
}
svsk->sk_sk->sk_stamp = skb->tstamp;
- set_bit(SK_DATA, &svsk->sk_flags); /* there may be more data... */
+ set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); /* there may be more data... */
/*
* Maybe more packets - kick another thread ASAP.
*/
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
len = skb->len - sizeof(struct udphdr);
rqstp->rq_arg.len = len;
@@ -861,13 +512,14 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
skb_free_datagram(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);
return 0;
}
- rqstp->rq_skbuff = skb;
+ rqstp->rq_xprt_ctxt = skb;
}
rqstp->rq_arg.page_base = 0;
@@ -900,27 +552,81 @@ svc_udp_sendto(struct svc_rqst *rqstp)
return error;
}
-static void
-svc_udp_init(struct svc_sock *svsk)
+static void svc_udp_prep_reply_hdr(struct svc_rqst *rqstp)
+{
+}
+
+static int svc_udp_has_wspace(struct svc_xprt *xprt)
+{
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
+ struct svc_serv *serv = xprt->xpt_server;
+ unsigned long required;
+
+ /*
+ * Set the SOCK_NOSPACE flag before checking the available
+ * sock space.
+ */
+ set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
+ required = atomic_read(&svsk->sk_xprt.xpt_reserved) + serv->sv_max_mesg;
+ if (required*2 > sock_wspace(svsk->sk_sk))
+ return 0;
+ clear_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
+ return 1;
+}
+
+static struct svc_xprt *svc_udp_accept(struct svc_xprt *xprt)
+{
+ BUG();
+ return NULL;
+}
+
+static struct svc_xprt *svc_udp_create(struct svc_serv *serv,
+ struct sockaddr *sa, int salen,
+ int flags)
+{
+ return svc_create_socket(serv, IPPROTO_UDP, sa, salen, flags);
+}
+
+static struct svc_xprt_ops svc_udp_ops = {
+ .xpo_create = svc_udp_create,
+ .xpo_recvfrom = svc_udp_recvfrom,
+ .xpo_sendto = svc_udp_sendto,
+ .xpo_release_rqst = svc_release_skb,
+ .xpo_detach = svc_sock_detach,
+ .xpo_free = svc_sock_free,
+ .xpo_prep_reply_hdr = svc_udp_prep_reply_hdr,
+ .xpo_has_wspace = svc_udp_has_wspace,
+ .xpo_accept = svc_udp_accept,
+};
+
+static struct svc_xprt_class svc_udp_class = {
+ .xcl_name = "udp",
+ .xcl_owner = THIS_MODULE,
+ .xcl_ops = &svc_udp_ops,
+ .xcl_max_payload = RPCSVC_MAXPAYLOAD_UDP,
+};
+
+static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv)
{
int one = 1;
mm_segment_t oldfs;
+ 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;
- svsk->sk_recvfrom = svc_udp_recvfrom;
- svsk->sk_sendto = svc_udp_sendto;
/* initialise setting must have enough space to
* receive and respond to one request.
* svc_udp_recvfrom will re-adjust if necessary
*/
svc_sock_setbufsize(svsk->sk_sock,
- 3 * svsk->sk_server->sv_max_mesg,
- 3 * svsk->sk_server->sv_max_mesg);
+ 3 * svsk->sk_xprt.xpt_server->sv_max_mesg,
+ 3 * svsk->sk_xprt.xpt_server->sv_max_mesg);
- set_bit(SK_DATA, &svsk->sk_flags); /* might have come in before data_ready set up */
- set_bit(SK_CHNGBUF, &svsk->sk_flags);
+ /* 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);
@@ -934,8 +640,7 @@ svc_udp_init(struct svc_sock *svsk)
* 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;
@@ -954,8 +659,8 @@ svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
*/
if (sk->sk_state == TCP_LISTEN) {
if (svsk) {
- set_bit(SK_CONN, &svsk->sk_flags);
- svc_sock_enqueue(svsk);
+ set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);
+ svc_xprt_enqueue(&svsk->sk_xprt);
} else
printk("svc: socket %p: no user data\n", sk);
}
@@ -967,8 +672,7 @@ svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
/*
* 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;
@@ -978,51 +682,36 @@ svc_tcp_state_change(struct sock *sk)
if (!svsk)
printk("svc: socket %p: no user data\n", sk);
else {
- set_bit(SK_CLOSE, &svsk->sk_flags);
- svc_sock_enqueue(svsk);
+ 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);
}
-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;
dprintk("svc: socket %p TCP data ready (svsk %p)\n",
sk, sk->sk_user_data);
if (svsk) {
- set_bit(SK_DATA, &svsk->sk_flags);
- svc_sock_enqueue(svsk);
+ 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;
- }
-}
-
/*
* Accept a TCP connection
*/
-static void
-svc_tcp_accept(struct svc_sock *svsk)
+static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt)
{
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
struct sockaddr_storage addr;
struct sockaddr *sin = (struct sockaddr *) &addr;
- struct svc_serv *serv = svsk->sk_server;
+ struct svc_serv *serv = svsk->sk_xprt.xpt_server;
struct socket *sock = svsk->sk_sock;
struct socket *newsock;
struct svc_sock *newsvsk;
@@ -1031,9 +720,9 @@ svc_tcp_accept(struct svc_sock *svsk)
dprintk("svc: tcp_accept %p sock %p\n", svsk, sock);
if (!sock)
- return;
+ return NULL;
- clear_bit(SK_CONN, &svsk->sk_flags);
+ clear_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);
err = kernel_accept(sock, &newsock, O_NONBLOCK);
if (err < 0) {
if (err == -ENOMEM)
@@ -1042,11 +731,9 @@ svc_tcp_accept(struct svc_sock *svsk)
else if (err != -EAGAIN && net_ratelimit())
printk(KERN_WARNING "%s: accept failed (err %d)!\n",
serv->sv_name, -err);
- return;
+ return NULL;
}
-
- set_bit(SK_CONN, &svsk->sk_flags);
- svc_sock_enqueue(svsk);
+ set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);
err = kernel_getpeername(newsock, sin, &slen);
if (err < 0) {
@@ -1077,106 +764,42 @@ svc_tcp_accept(struct svc_sock *svsk)
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_sock_received(newsvsk);
-
- /* 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.
- */
- 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);
- printk(KERN_NOTICE
- "%s: last TCP connect from %s\n",
- serv->sv_name, __svc_print_addr(sin,
- buf, sizeof(buf)));
- }
- /*
- * Always select the oldest socket. It's not fair,
- * but so is life
- */
- svsk = list_entry(serv->sv_tempsocks.prev,
- struct svc_sock,
- sk_list);
- set_bit(SK_CLOSE, &svsk->sk_flags);
- atomic_inc(&svsk->sk_inuse);
- }
- spin_unlock_bh(&serv->sv_lock);
-
- if (svsk) {
- svc_sock_enqueue(svsk);
- svc_sock_put(svsk);
- }
-
- }
+ svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen);
if (serv->sv_stats)
serv->sv_stats->nettcpconn++;
- return;
+ return &newsvsk->sk_xprt;
failed:
sock_release(newsock);
- return;
+ return NULL;
}
/*
* Receive data from a TCP socket.
*/
-static int
-svc_tcp_recvfrom(struct svc_rqst *rqstp)
+static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
{
- struct svc_sock *svsk = rqstp->rq_sock;
- struct svc_serv *serv = svsk->sk_server;
+ 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;
dprintk("svc: tcp_recv %p data %d conn %d close %d\n",
- svsk, test_bit(SK_DATA, &svsk->sk_flags),
- test_bit(SK_CONN, &svsk->sk_flags),
- test_bit(SK_CLOSE, &svsk->sk_flags));
+ 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_sock_received(svsk);
- return svc_deferred_recv(rqstp);
- }
-
- if (test_bit(SK_CLOSE, &svsk->sk_flags)) {
- svc_delete_socket(svsk);
- return 0;
- }
-
- if (svsk->sk_sk->sk_state == TCP_LISTEN) {
- svc_tcp_accept(svsk);
- svc_sock_received(svsk);
- return 0;
- }
-
- if (test_and_clear_bit(SK_CHNGBUF, &svsk->sk_flags))
+ if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags))
/* sndbuf needs to have room for one request
* per thread, otherwise we can stall even when the
* network isn't a bottleneck.
@@ -1193,7 +816,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
(serv->sv_nrthreads+3) * serv->sv_max_mesg,
3 * serv->sv_max_mesg);
- clear_bit(SK_DATA, &svsk->sk_flags);
+ 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
@@ -1212,7 +835,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
if (len < want) {
dprintk("svc: short recvfrom while reading record length (%d of %lu)\n",
len, want);
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
return -EAGAIN; /* record header not complete */
}
@@ -1248,11 +871,11 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
if (len < svsk->sk_reclen) {
dprintk("svc: incomplete TCP record (%d of %d)\n",
len, svsk->sk_reclen);
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
return -EAGAIN; /* record not complete */
}
len = svsk->sk_reclen;
- set_bit(SK_DATA, &svsk->sk_flags);
+ set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
vec = rqstp->rq_vec;
vec[0] = rqstp->rq_arg.head[0];
@@ -1281,30 +904,31 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
rqstp->rq_arg.page_len = len - rqstp->rq_arg.head[0].iov_len;
}
- rqstp->rq_skbuff = NULL;
+ rqstp->rq_xprt_ctxt = NULL;
rqstp->rq_prot = IPPROTO_TCP;
/* Reset TCP read info */
svsk->sk_reclen = 0;
svsk->sk_tcplen = 0;
- svc_sock_received(svsk);
+ svc_xprt_copy_addrs(rqstp, &svsk->sk_xprt);
+ svc_xprt_received(&svsk->sk_xprt);
if (serv->sv_stats)
serv->sv_stats->nettcpcnt++;
return len;
err_delete:
- svc_delete_socket(svsk);
+ set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
return -EAGAIN;
error:
if (len == -EAGAIN) {
dprintk("RPC: TCP recvfrom got EAGAIN\n");
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
} else {
printk(KERN_NOTICE "%s: recvfrom returned errno %d\n",
- svsk->sk_server->sv_name, -len);
+ svsk->sk_xprt.xpt_server->sv_name, -len);
goto err_delete;
}
@@ -1314,8 +938,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
/*
* 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;
@@ -1328,35 +951,109 @@ svc_tcp_sendto(struct svc_rqst *rqstp)
reclen = htonl(0x80000000|((xbufp->len ) - 4));
memcpy(xbufp->head[0].iov_base, &reclen, 4);
- if (test_bit(SK_DEAD, &rqstp->rq_sock->sk_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_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(SK_CLOSE, &rqstp->rq_sock->sk_flags);
- svc_sock_enqueue(rqstp->rq_sock);
+ set_bit(XPT_CLOSE, &rqstp->rq_xprt->xpt_flags);
+ svc_xprt_enqueue(rqstp->rq_xprt);
sent = -EAGAIN;
}
return sent;
}
-static void
-svc_tcp_init(struct svc_sock *svsk)
+/*
+ * Setup response header. TCP has a 4B record length field.
+ */
+static void svc_tcp_prep_reply_hdr(struct svc_rqst *rqstp)
+{
+ struct kvec *resv = &rqstp->rq_res.head[0];
+
+ /* tcp needs a space for the record length... */
+ svc_putnl(resv, 0);
+}
+
+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;
+ int required;
+ int wspace;
+
+ /*
+ * Set the SOCK_NOSPACE flag before checking the available
+ * sock space.
+ */
+ 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;
+}
+
+static struct svc_xprt *svc_tcp_create(struct svc_serv *serv,
+ struct sockaddr *sa, int salen,
+ int flags)
+{
+ return svc_create_socket(serv, IPPROTO_TCP, sa, salen, flags);
+}
+
+static struct svc_xprt_ops svc_tcp_ops = {
+ .xpo_create = svc_tcp_create,
+ .xpo_recvfrom = svc_tcp_recvfrom,
+ .xpo_sendto = svc_tcp_sendto,
+ .xpo_release_rqst = svc_release_skb,
+ .xpo_detach = svc_sock_detach,
+ .xpo_free = svc_sock_free,
+ .xpo_prep_reply_hdr = svc_tcp_prep_reply_hdr,
+ .xpo_has_wspace = svc_tcp_has_wspace,
+ .xpo_accept = svc_tcp_accept,
+};
+
+static struct svc_xprt_class svc_tcp_class = {
+ .xcl_name = "tcp",
+ .xcl_owner = THIS_MODULE,
+ .xcl_ops = &svc_tcp_ops,
+ .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP,
+};
+
+void svc_init_xprt_sock(void)
+{
+ svc_reg_xprt_class(&svc_tcp_class);
+ svc_reg_xprt_class(&svc_udp_class);
+}
+
+void svc_cleanup_xprt_sock(void)
+{
+ svc_unreg_xprt_class(&svc_tcp_class);
+ svc_unreg_xprt_class(&svc_udp_class);
+}
+
+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);
- svsk->sk_recvfrom = svc_tcp_recvfrom;
- svsk->sk_sendto = svc_tcp_sendto;
-
+ 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);
sk->sk_data_ready = svc_tcp_listen_data_ready;
- set_bit(SK_CONN, &svsk->sk_flags);
+ set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);
} else {
dprintk("setting up TCP socket for reading\n");
sk->sk_state_change = svc_tcp_state_change;
@@ -1373,18 +1070,17 @@ svc_tcp_init(struct svc_sock *svsk)
* svc_tcp_recvfrom will re-adjust if necessary
*/
svc_sock_setbufsize(svsk->sk_sock,
- 3 * svsk->sk_server->sv_max_mesg,
- 3 * svsk->sk_server->sv_max_mesg);
+ 3 * svsk->sk_xprt.xpt_server->sv_max_mesg,
+ 3 * svsk->sk_xprt.xpt_server->sv_max_mesg);
- set_bit(SK_CHNGBUF, &svsk->sk_flags);
- set_bit(SK_DATA, &svsk->sk_flags);
+ set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags);
+ set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
if (sk->sk_state != TCP_ESTABLISHED)
- set_bit(SK_CLOSE, &svsk->sk_flags);
+ set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
}
}
-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
@@ -1395,232 +1091,18 @@ svc_sock_update_bufs(struct svc_serv *serv)
spin_lock_bh(&serv->sv_lock);
list_for_each(le, &serv->sv_permsocks) {
struct svc_sock *svsk =
- list_entry(le, struct svc_sock, sk_list);
- set_bit(SK_CHNGBUF, &svsk->sk_flags);
+ list_entry(le, struct svc_sock, sk_xprt.xpt_list);
+ set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags);
}
list_for_each(le, &serv->sv_tempsocks) {
struct svc_sock *svsk =
- list_entry(le, struct svc_sock, sk_list);
- set_bit(SK_CHNGBUF, &svsk->sk_flags);
+ list_entry(le, struct svc_sock, sk_xprt.xpt_list);
+ set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags);
}
spin_unlock_bh(&serv->sv_lock);
}
/*
- * 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;
- atomic_inc(&svsk->sk_inuse);
- rqstp->rq_reserved = serv->sv_max_mesg;
- atomic_add(rqstp->rq_reserved, &svsk->sk_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);
-
- dprintk("svc: server %p, pool %u, socket %p, inuse=%d\n",
- rqstp, pool->sp_id, svsk, atomic_read(&svsk->sk_inuse));
- len = svsk->sk_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;
- }
- svsk->sk_lastrecv = get_seconds();
- clear_bit(SK_OLD, &svsk->sk_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_sock *svsk;
- int len;
- struct xdr_buf *xb;
-
- if ((svsk = rqstp->rq_sock) == NULL) {
- printk(KERN_WARNING "NULL socket pointer in %s:%d\n",
- __FILE__, __LINE__);
- return -EFAULT;
- }
-
- /* release the receive skb before sending the reply */
- svc_release_skb(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 svsk->sk_mutex to serialize outgoing data. */
- mutex_lock(&svsk->sk_mutex);
- if (test_bit(SK_DEAD, &svsk->sk_flags))
- len = -ENOTCONN;
- else
- len = svsk->sk_sendto(rqstp);
- mutex_unlock(&svsk->sk_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_list);
-
- if (!test_and_set_bit(SK_OLD, &svsk->sk_flags))
- continue;
- if (atomic_read(&svsk->sk_inuse) > 1 || test_bit(SK_BUSY, &svsk->sk_flags))
- continue;
- atomic_inc(&svsk->sk_inuse);
- list_move(le, &to_be_aged);
- set_bit(SK_CLOSE, &svsk->sk_flags);
- set_bit(SK_DETACHED, &svsk->sk_flags);
- }
- spin_unlock_bh(&serv->sv_lock);
-
- while (!list_empty(&to_be_aged)) {
- le = to_be_aged.next;
- /* fiddling the sk_list node is safe 'cos we're SK_DETACHED */
- list_del_init(le);
- svsk = list_entry(le, struct svc_sock, sk_list);
-
- dprintk("queuing svsk %p for closing, %lu seconds old\n",
- svsk, get_seconds() - svsk->sk_lastrecv);
-
- /* a thread will dequeue and close it soon */
- svc_sock_enqueue(svsk);
- svc_sock_put(svsk);
- }
-
- mod_timer(&serv->sv_temptimer, jiffies + svc_conn_age_period * HZ);
-}
-
-/*
* Initialize socket for RPC use and create svc_sock struct
* XXX: May want to setsockopt SO_SNDBUF and SO_RCVBUF.
*/
@@ -1631,7 +1113,6 @@ 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 is_temporary = flags & SVC_SOCK_TEMPORARY;
dprintk("svc: svc_setup_socket %p\n", sock);
if (!(svsk = kzalloc(sizeof(*svsk), GFP_KERNEL))) {
@@ -1651,44 +1132,18 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
return NULL;
}
- set_bit(SK_BUSY, &svsk->sk_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;
- svsk->sk_server = serv;
- atomic_set(&svsk->sk_inuse, 1);
- svsk->sk_lastrecv = get_seconds();
- spin_lock_init(&svsk->sk_lock);
- INIT_LIST_HEAD(&svsk->sk_deferred);
- INIT_LIST_HEAD(&svsk->sk_ready);
- mutex_init(&svsk->sk_mutex);
/* Initialize the socket */
if (sock->type == SOCK_DGRAM)
- svc_udp_init(svsk);
+ svc_udp_init(svsk, serv);
else
- svc_tcp_init(svsk);
-
- spin_lock_bh(&serv->sv_lock);
- if (is_temporary) {
- set_bit(SK_TEMP, &svsk->sk_flags);
- list_add(&svsk->sk_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(SK_TEMP, &svsk->sk_flags);
- list_add(&svsk->sk_list, &serv->sv_permsocks);
- }
- spin_unlock_bh(&serv->sv_lock);
+ svc_tcp_init(svsk, serv);
dprintk("svc: svc_setup_socket created %p (inet %p)\n",
svsk, svsk->sk_sk);
@@ -1717,7 +1172,16 @@ int svc_addsock(struct svc_serv *serv,
else {
svsk = svc_setup_socket(serv, so, &err, SVC_SOCK_DEFAULTS);
if (svsk) {
- svc_sock_received(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;
}
}
@@ -1733,14 +1197,19 @@ EXPORT_SYMBOL_GPL(svc_addsock);
/*
* Create socket for RPC service.
*/
-static int svc_create_socket(struct svc_serv *serv, int protocol,
- struct sockaddr *sin, int len, int flags)
+static struct svc_xprt *svc_create_socket(struct svc_serv *serv,
+ int protocol,
+ struct sockaddr *sin, int len,
+ int flags)
{
struct svc_sock *svsk;
struct socket *sock;
int error;
int type;
char buf[RPC_MAX_ADDRBUFLEN];
+ struct sockaddr_storage addr;
+ struct sockaddr *newsin = (struct sockaddr *)&addr;
+ int newlen;
dprintk("svc: svc_create_socket(%s, %d, %s)\n",
serv->sv_program->pg_name, protocol,
@@ -1749,13 +1218,13 @@ static int svc_create_socket(struct svc_serv *serv, int protocol,
if (protocol != IPPROTO_UDP && protocol != IPPROTO_TCP) {
printk(KERN_WARNING "svc: only UDP and TCP "
"sockets supported\n");
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
}
type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM;
error = sock_create_kern(sin->sa_family, type, protocol, &sock);
if (error < 0)
- return error;
+ return ERR_PTR(error);
svc_reclassify_socket(sock);
@@ -1765,203 +1234,55 @@ static int svc_create_socket(struct svc_serv *serv, int protocol,
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_sock_received(svsk);
- return ntohs(inet_sk(svsk->sk_sk)->sport);
+ svc_xprt_set_local(&svsk->sk_xprt, newsin, newlen);
+ return (struct svc_xprt *)svsk;
}
bummer:
dprintk("svc: svc_create_socket error = %d\n", -error);
sock_release(sock);
- return error;
+ return ERR_PTR(error);
}
/*
- * Remove a dead socket
+ * Detach the svc_sock from the socket so that no
+ * more callbacks occur.
*/
-static void
-svc_delete_socket(struct svc_sock *svsk)
+static void svc_sock_detach(struct svc_xprt *xprt)
{
- struct svc_serv *serv;
- struct sock *sk;
-
- dprintk("svc: svc_delete_socket(%p)\n", svsk);
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
+ struct sock *sk = svsk->sk_sk;
- serv = svsk->sk_server;
- sk = svsk->sk_sk;
+ dprintk("svc: svc_sock_detach(%p)\n", svsk);
+ /* put back the old socket callbacks */
sk->sk_state_change = svsk->sk_ostate;
sk->sk_data_ready = svsk->sk_odata;
sk->sk_write_space = svsk->sk_owspace;
-
- spin_lock_bh(&serv->sv_lock);
-
- if (!test_and_set_bit(SK_DETACHED, &svsk->sk_flags))
- list_del_init(&svsk->sk_list);
- /*
- * We used to delete the svc_sock from whichever list
- * it's sk_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(SK_DEAD, &svsk->sk_flags)) {
- BUG_ON(atomic_read(&svsk->sk_inuse)<2);
- atomic_dec(&svsk->sk_inuse);
- if (test_bit(SK_TEMP, &svsk->sk_flags))
- serv->sv_tmpcnt--;
- }
-
- spin_unlock_bh(&serv->sv_lock);
-}
-
-static void svc_close_socket(struct svc_sock *svsk)
-{
- set_bit(SK_CLOSE, &svsk->sk_flags);
- if (test_and_set_bit(SK_BUSY, &svsk->sk_flags))
- /* someone else will have to effect the close */
- return;
-
- atomic_inc(&svsk->sk_inuse);
- svc_delete_socket(svsk);
- clear_bit(SK_BUSY, &svsk->sk_flags);
- svc_sock_put(svsk);
-}
-
-void svc_force_close_socket(struct svc_sock *svsk)
-{
- set_bit(SK_CLOSE, &svsk->sk_flags);
- if (test_bit(SK_BUSY, &svsk->sk_flags)) {
- /* Waiting to be processed, but no threads left,
- * So just remove it from the waiting list
- */
- list_del_init(&svsk->sk_ready);
- clear_bit(SK_BUSY, &svsk->sk_flags);
- }
- svc_close_socket(svsk);
-}
-
-/**
- * svc_makesock - Make a socket for nfsd and lockd
- * @serv: RPC server structure
- * @protocol: transport protocol to use
- * @port: port to use
- * @flags: requested socket characteristics
- *
- */
-int svc_makesock(struct svc_serv *serv, int protocol, unsigned short port,
- int flags)
-{
- struct sockaddr_in sin = {
- .sin_family = AF_INET,
- .sin_addr.s_addr = INADDR_ANY,
- .sin_port = htons(port),
- };
-
- dprintk("svc: creating socket proto = %d\n", protocol);
- return svc_create_socket(serv, protocol, (struct sockaddr *) &sin,
- sizeof(sin), flags);
}
/*
- * Handle defer and revisit of requests
+ * Free the svc_sock's socket resources and the svc_sock itself.
*/
-
-static void svc_revisit(struct cache_deferred_req *dreq, int too_many)
+static void svc_sock_free(struct svc_xprt *xprt)
{
- struct svc_deferred_req *dr = container_of(dreq, struct svc_deferred_req, handle);
- struct svc_sock *svsk;
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
+ dprintk("svc: svc_sock_free(%p)\n", svsk);
- if (too_many) {
- svc_sock_put(dr->svsk);
- 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(SK_DEFERRED, &svsk->sk_flags);
- svc_sock_enqueue(svsk);
- svc_sock_put(svsk);
-}
-
-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);
- }
- atomic_inc(&rqstp->rq_sock->sk_inuse);
- dr->svsk = rqstp->rq_sock;
-
- dr->handle.revisit = svc_revisit;
- return &dr->handle;
-}
-
-/*
- * recv data from a deferred request into an active one
- */
-static int svc_deferred_recv(struct svc_rqst *rqstp)
-{
- 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(SK_DEFERRED, &svsk->sk_flags))
- return NULL;
- spin_lock(&svsk->sk_lock);
- clear_bit(SK_DEFERRED, &svsk->sk_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(SK_DEFERRED, &svsk->sk_flags);
- }
- spin_unlock(&svsk->sk_lock);
- return dr;
+ if (svsk->sk_sock->file)
+ sockfd_put(svsk->sk_sock);
+ else
+ sock_release(svsk->sk_sock);
+ kfree(svsk);
}