/*
|
/*
|
* linux/net/sunrpc/svcsock.c
|
* linux/net/sunrpc/svcsock.c
|
*
|
*
|
* These are the RPC server socket internals.
|
* These are the RPC server socket internals.
|
*
|
*
|
* The server scheduling algorithm does not always distribute the load
|
* The server scheduling algorithm does not always distribute the load
|
* evenly when servicing a single client. May need to modify the
|
* evenly when servicing a single client. May need to modify the
|
* svc_sock_enqueue procedure...
|
* svc_sock_enqueue procedure...
|
*
|
*
|
* TCP support is largely untested and may be a little slow. The problem
|
* 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
|
* is that we currently do two separate recvfrom's, one for the 4-byte
|
* record length, and the second for the actual record. This could possibly
|
* record length, and the second for the actual record. This could possibly
|
* be improved by always reading a minimum size of around 100 bytes and
|
* be improved by always reading a minimum size of around 100 bytes and
|
* tucking any superfluous bytes away in a temporary store. Still, that
|
* tucking any superfluous bytes away in a temporary store. Still, that
|
* leaves write requests out in the rain. An alternative may be to peek at
|
* leaves write requests out in the rain. An alternative may be to peek at
|
* the first skb in the queue, and if it matches the next TCP sequence
|
* the first skb in the queue, and if it matches the next TCP sequence
|
* number, to extract the record marker. Yuck.
|
* number, to extract the record marker. Yuck.
|
*
|
*
|
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
|
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
|
*/
|
*/
|
|
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/fcntl.h>
|
#include <linux/fcntl.h>
|
#include <linux/net.h>
|
#include <linux/net.h>
|
#include <linux/in.h>
|
#include <linux/in.h>
|
#include <linux/inet.h>
|
#include <linux/inet.h>
|
#include <linux/udp.h>
|
#include <linux/udp.h>
|
#include <linux/version.h>
|
#include <linux/version.h>
|
#include <linux/unistd.h>
|
#include <linux/unistd.h>
|
#include <linux/slab.h>
|
#include <linux/slab.h>
|
#include <linux/netdevice.h>
|
#include <linux/netdevice.h>
|
#include <linux/skbuff.h>
|
#include <linux/skbuff.h>
|
#include <net/sock.h>
|
#include <net/sock.h>
|
#include <net/checksum.h>
|
#include <net/checksum.h>
|
#include <net/ip.h>
|
#include <net/ip.h>
|
#include <asm/uaccess.h>
|
#include <asm/uaccess.h>
|
#include <asm/ioctls.h>
|
#include <asm/ioctls.h>
|
|
|
#include <linux/sunrpc/types.h>
|
#include <linux/sunrpc/types.h>
|
#include <linux/sunrpc/xdr.h>
|
#include <linux/sunrpc/xdr.h>
|
#include <linux/sunrpc/svcsock.h>
|
#include <linux/sunrpc/svcsock.h>
|
#include <linux/sunrpc/stats.h>
|
#include <linux/sunrpc/stats.h>
|
|
|
/* SMP locking strategy:
|
/* SMP locking strategy:
|
*
|
*
|
* svc_serv->sv_lock protects most stuff for that service.
|
* svc_serv->sv_lock protects most stuff for that service.
|
*
|
*
|
* Some flags can be set to certain values at any time
|
* Some flags can be set to certain values at any time
|
* providing that certain rules are followed:
|
* providing that certain rules are followed:
|
*
|
*
|
* SK_BUSY can be set to 0 at any time.
|
* SK_BUSY can be set to 0 at any time.
|
* svc_sock_enqueue must be called afterwards
|
* svc_sock_enqueue must be called afterwards
|
* SK_CONN, SK_DATA, can be set or cleared at any time.
|
* SK_CONN, SK_DATA, can be set or cleared at any time.
|
* after a set, svc_sock_enqueue must be called.
|
* after a set, svc_sock_enqueue must be called.
|
* after a clear, the socket must be read/accepted
|
* after a clear, the socket must be read/accepted
|
* if this succeeds, it must be set again.
|
* if this succeeds, it must be set again.
|
* SK_CLOSE can set at any time. It is never cleared.
|
* SK_CLOSE can set at any time. It is never cleared.
|
*
|
*
|
*/
|
*/
|
|
|
#define RPCDBG_FACILITY RPCDBG_SVCSOCK
|
#define RPCDBG_FACILITY RPCDBG_SVCSOCK
|
|
|
|
|
static struct svc_sock *svc_setup_socket(struct svc_serv *, struct socket *,
|
static struct svc_sock *svc_setup_socket(struct svc_serv *, struct socket *,
|
int *errp, int pmap_reg);
|
int *errp, int pmap_reg);
|
static void svc_udp_data_ready(struct sock *, int);
|
static void svc_udp_data_ready(struct sock *, int);
|
static int svc_udp_recvfrom(struct svc_rqst *);
|
static int svc_udp_recvfrom(struct svc_rqst *);
|
static int svc_udp_sendto(struct svc_rqst *);
|
static int svc_udp_sendto(struct svc_rqst *);
|
|
|
|
|
/*
|
/*
|
* Queue up an idle server thread. Must have serv->sv_lock held.
|
* Queue up an idle server thread. Must have serv->sv_lock held.
|
* Note: this is really a stack rather than a queue, so that we only
|
* 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 polute
|
* use as many different threads as we need, and the rest don't polute
|
* the cache.
|
* the cache.
|
*/
|
*/
|
static inline void
|
static inline void
|
svc_serv_enqueue(struct svc_serv *serv, struct svc_rqst *rqstp)
|
svc_serv_enqueue(struct svc_serv *serv, struct svc_rqst *rqstp)
|
{
|
{
|
list_add(&rqstp->rq_list, &serv->sv_threads);
|
list_add(&rqstp->rq_list, &serv->sv_threads);
|
}
|
}
|
|
|
/*
|
/*
|
* Dequeue an nfsd thread. Must have serv->sv_lock held.
|
* Dequeue an nfsd thread. Must have serv->sv_lock held.
|
*/
|
*/
|
static inline void
|
static inline void
|
svc_serv_dequeue(struct svc_serv *serv, struct svc_rqst *rqstp)
|
svc_serv_dequeue(struct svc_serv *serv, struct svc_rqst *rqstp)
|
{
|
{
|
list_del(&rqstp->rq_list);
|
list_del(&rqstp->rq_list);
|
}
|
}
|
|
|
/*
|
/*
|
* Release an skbuff after use
|
* Release an skbuff after use
|
*/
|
*/
|
static inline void
|
static inline void
|
svc_release_skb(struct svc_rqst *rqstp)
|
svc_release_skb(struct svc_rqst *rqstp)
|
{
|
{
|
struct sk_buff *skb = rqstp->rq_skbuff;
|
struct sk_buff *skb = rqstp->rq_skbuff;
|
|
|
if (!skb)
|
if (!skb)
|
return;
|
return;
|
rqstp->rq_skbuff = NULL;
|
rqstp->rq_skbuff = NULL;
|
|
|
dprintk("svc: service %p, releasing skb %p\n", rqstp, skb);
|
dprintk("svc: service %p, releasing skb %p\n", rqstp, skb);
|
skb_free_datagram(rqstp->rq_sock->sk_sk, skb);
|
skb_free_datagram(rqstp->rq_sock->sk_sk, skb);
|
}
|
}
|
|
|
/*
|
/*
|
* Queue up a socket with data pending. If there are idle nfsd
|
* Queue up a socket with data pending. If there are idle nfsd
|
* processes, wake 'em up.
|
* processes, wake 'em up.
|
*
|
*
|
*/
|
*/
|
static void
|
static void
|
svc_sock_enqueue(struct svc_sock *svsk)
|
svc_sock_enqueue(struct svc_sock *svsk)
|
{
|
{
|
struct svc_serv *serv = svsk->sk_server;
|
struct svc_serv *serv = svsk->sk_server;
|
struct svc_rqst *rqstp;
|
struct svc_rqst *rqstp;
|
|
|
if (!(svsk->sk_flags &
|
if (!(svsk->sk_flags &
|
( (1<<SK_CONN)|(1<<SK_DATA)|(1<<SK_CLOSE)) ))
|
( (1<<SK_CONN)|(1<<SK_DATA)|(1<<SK_CLOSE)) ))
|
return;
|
return;
|
if (test_bit(SK_DEAD, &svsk->sk_flags))
|
if (test_bit(SK_DEAD, &svsk->sk_flags))
|
return;
|
return;
|
|
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
|
|
if (!list_empty(&serv->sv_threads) &&
|
if (!list_empty(&serv->sv_threads) &&
|
!list_empty(&serv->sv_sockets))
|
!list_empty(&serv->sv_sockets))
|
printk(KERN_ERR
|
printk(KERN_ERR
|
"svc_sock_enqueue: threads and sockets both waiting??\n");
|
"svc_sock_enqueue: threads and sockets both waiting??\n");
|
|
|
if (test_bit(SK_BUSY, &svsk->sk_flags)) {
|
if (test_bit(SK_BUSY, &svsk->sk_flags)) {
|
/* Don't enqueue socket while daemon is receiving */
|
/* Don't enqueue socket while daemon is receiving */
|
dprintk("svc: socket %p busy, not enqueued\n", svsk->sk_sk);
|
dprintk("svc: socket %p busy, not enqueued\n", svsk->sk_sk);
|
goto out_unlock;
|
goto out_unlock;
|
}
|
}
|
|
|
if (((svsk->sk_reserved + serv->sv_bufsz)*2
|
if (((svsk->sk_reserved + serv->sv_bufsz)*2
|
> sock_wspace(svsk->sk_sk))
|
> sock_wspace(svsk->sk_sk))
|
&& !test_bit(SK_CLOSE, &svsk->sk_flags)
|
&& !test_bit(SK_CLOSE, &svsk->sk_flags)
|
&& !test_bit(SK_CONN, &svsk->sk_flags)) {
|
&& !test_bit(SK_CONN, &svsk->sk_flags)) {
|
/* Don't enqueue while not enough space for reply */
|
/* Don't enqueue while not enough space for reply */
|
dprintk("svc: socket %p no space, %d*2 > %ld, not enqueued\n",
|
dprintk("svc: socket %p no space, %d*2 > %ld, not enqueued\n",
|
svsk->sk_sk, svsk->sk_reserved+serv->sv_bufsz,
|
svsk->sk_sk, svsk->sk_reserved+serv->sv_bufsz,
|
sock_wspace(svsk->sk_sk));
|
sock_wspace(svsk->sk_sk));
|
goto out_unlock;
|
goto out_unlock;
|
}
|
}
|
|
|
/* Mark socket as busy. It will remain in this state until the
|
/* Mark socket as busy. It will remain in this state until the
|
* server has processed all pending data and put the socket back
|
* server has processed all pending data and put the socket back
|
* on the idle list.
|
* on the idle list.
|
*/
|
*/
|
set_bit(SK_BUSY, &svsk->sk_flags);
|
set_bit(SK_BUSY, &svsk->sk_flags);
|
|
|
if (!list_empty(&serv->sv_threads)) {
|
if (!list_empty(&serv->sv_threads)) {
|
rqstp = list_entry(serv->sv_threads.next,
|
rqstp = list_entry(serv->sv_threads.next,
|
struct svc_rqst,
|
struct svc_rqst,
|
rq_list);
|
rq_list);
|
dprintk("svc: socket %p served by daemon %p\n",
|
dprintk("svc: socket %p served by daemon %p\n",
|
svsk->sk_sk, rqstp);
|
svsk->sk_sk, rqstp);
|
svc_serv_dequeue(serv, rqstp);
|
svc_serv_dequeue(serv, rqstp);
|
if (rqstp->rq_sock)
|
if (rqstp->rq_sock)
|
printk(KERN_ERR
|
printk(KERN_ERR
|
"svc_sock_enqueue: server %p, rq_sock=%p!\n",
|
"svc_sock_enqueue: server %p, rq_sock=%p!\n",
|
rqstp, rqstp->rq_sock);
|
rqstp, rqstp->rq_sock);
|
rqstp->rq_sock = svsk;
|
rqstp->rq_sock = svsk;
|
svsk->sk_inuse++;
|
svsk->sk_inuse++;
|
rqstp->rq_reserved = serv->sv_bufsz;
|
rqstp->rq_reserved = serv->sv_bufsz;
|
svsk->sk_reserved += rqstp->rq_reserved;
|
svsk->sk_reserved += rqstp->rq_reserved;
|
wake_up(&rqstp->rq_wait);
|
wake_up(&rqstp->rq_wait);
|
} else {
|
} else {
|
dprintk("svc: socket %p put into queue\n", svsk->sk_sk);
|
dprintk("svc: socket %p put into queue\n", svsk->sk_sk);
|
list_add_tail(&svsk->sk_ready, &serv->sv_sockets);
|
list_add_tail(&svsk->sk_ready, &serv->sv_sockets);
|
set_bit(SK_QUED, &svsk->sk_flags);
|
set_bit(SK_QUED, &svsk->sk_flags);
|
}
|
}
|
|
|
out_unlock:
|
out_unlock:
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
}
|
}
|
|
|
/*
|
/*
|
* Dequeue the first socket. Must be called with the serv->sv_lock held.
|
* Dequeue the first socket. Must be called with the serv->sv_lock held.
|
*/
|
*/
|
static inline struct svc_sock *
|
static inline struct svc_sock *
|
svc_sock_dequeue(struct svc_serv *serv)
|
svc_sock_dequeue(struct svc_serv *serv)
|
{
|
{
|
struct svc_sock *svsk;
|
struct svc_sock *svsk;
|
|
|
if (list_empty(&serv->sv_sockets))
|
if (list_empty(&serv->sv_sockets))
|
return NULL;
|
return NULL;
|
|
|
svsk = list_entry(serv->sv_sockets.next,
|
svsk = list_entry(serv->sv_sockets.next,
|
struct svc_sock, sk_ready);
|
struct svc_sock, sk_ready);
|
list_del(&svsk->sk_ready);
|
list_del(&svsk->sk_ready);
|
|
|
dprintk("svc: socket %p dequeued, inuse=%d\n",
|
dprintk("svc: socket %p dequeued, inuse=%d\n",
|
svsk->sk_sk, svsk->sk_inuse);
|
svsk->sk_sk, svsk->sk_inuse);
|
clear_bit(SK_QUED, &svsk->sk_flags);
|
clear_bit(SK_QUED, &svsk->sk_flags);
|
|
|
return svsk;
|
return svsk;
|
}
|
}
|
|
|
/*
|
/*
|
* Having read something from a socket, check whether it
|
* Having read something from a socket, check whether it
|
* needs to be re-enqueued.
|
* needs to be re-enqueued.
|
* Note: SK_DATA only gets cleared when a read-attempt finds
|
* Note: SK_DATA only gets cleared when a read-attempt finds
|
* no (or insufficient) data.
|
* no (or insufficient) data.
|
*/
|
*/
|
static inline void
|
static inline void
|
svc_sock_received(struct svc_sock *svsk)
|
svc_sock_received(struct svc_sock *svsk)
|
{
|
{
|
clear_bit(SK_BUSY, &svsk->sk_flags);
|
clear_bit(SK_BUSY, &svsk->sk_flags);
|
svc_sock_enqueue(svsk);
|
svc_sock_enqueue(svsk);
|
}
|
}
|
|
|
|
|
/**
|
/**
|
* svc_reserve - change the space reserved for the reply to a request.
|
* svc_reserve - change the space reserved for the reply to a request.
|
* @rqstp: The request in question
|
* @rqstp: The request in question
|
* @space: new max space to reserve
|
* @space: new max space to reserve
|
*
|
*
|
* Each request reserves some space on the output queue of the socket
|
* Each request reserves some space on the output queue of the socket
|
* to make sure the reply fits. This function reduces that reserved
|
* to make sure the reply fits. This function reduces that reserved
|
* space to be the amount of space used already, plus @space.
|
* space to be the amount of space used already, plus @space.
|
*
|
*
|
*/
|
*/
|
void svc_reserve(struct svc_rqst *rqstp, int space)
|
void svc_reserve(struct svc_rqst *rqstp, int space)
|
{
|
{
|
space += rqstp->rq_resbuf.len<<2;
|
space += rqstp->rq_resbuf.len<<2;
|
|
|
if (space < rqstp->rq_reserved) {
|
if (space < rqstp->rq_reserved) {
|
struct svc_sock *svsk = rqstp->rq_sock;
|
struct svc_sock *svsk = rqstp->rq_sock;
|
spin_lock_bh(&svsk->sk_server->sv_lock);
|
spin_lock_bh(&svsk->sk_server->sv_lock);
|
svsk->sk_reserved -= (rqstp->rq_reserved - space);
|
svsk->sk_reserved -= (rqstp->rq_reserved - space);
|
rqstp->rq_reserved = space;
|
rqstp->rq_reserved = space;
|
spin_unlock_bh(&svsk->sk_server->sv_lock);
|
spin_unlock_bh(&svsk->sk_server->sv_lock);
|
|
|
svc_sock_enqueue(svsk);
|
svc_sock_enqueue(svsk);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* Release a socket after use.
|
* Release a socket after use.
|
*/
|
*/
|
static inline void
|
static inline void
|
svc_sock_put(struct svc_sock *svsk)
|
svc_sock_put(struct svc_sock *svsk)
|
{
|
{
|
struct svc_serv *serv = svsk->sk_server;
|
struct svc_serv *serv = svsk->sk_server;
|
|
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
if (!--(svsk->sk_inuse) && test_bit(SK_DEAD, &svsk->sk_flags)) {
|
if (!--(svsk->sk_inuse) && test_bit(SK_DEAD, &svsk->sk_flags)) {
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
dprintk("svc: releasing dead socket\n");
|
dprintk("svc: releasing dead socket\n");
|
sock_release(svsk->sk_sock);
|
sock_release(svsk->sk_sock);
|
kfree(svsk);
|
kfree(svsk);
|
}
|
}
|
else
|
else
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
}
|
}
|
|
|
static void
|
static void
|
svc_sock_release(struct svc_rqst *rqstp)
|
svc_sock_release(struct svc_rqst *rqstp)
|
{
|
{
|
struct svc_sock *svsk = rqstp->rq_sock;
|
struct svc_sock *svsk = rqstp->rq_sock;
|
|
|
svc_release_skb(rqstp);
|
svc_release_skb(rqstp);
|
|
|
/* Reset response buffer and release
|
/* Reset response buffer and release
|
* the reservation.
|
* the reservation.
|
* But first, check that enough space was reserved
|
* But first, check that enough space was reserved
|
* for the reply, otherwise we have a bug!
|
* for the reply, otherwise we have a bug!
|
*/
|
*/
|
if ((rqstp->rq_resbuf.len<<2) > rqstp->rq_reserved)
|
if ((rqstp->rq_resbuf.len<<2) > rqstp->rq_reserved)
|
printk(KERN_ERR "RPC request reserved %d but used %d\n",
|
printk(KERN_ERR "RPC request reserved %d but used %d\n",
|
rqstp->rq_reserved,
|
rqstp->rq_reserved,
|
rqstp->rq_resbuf.len<<2);
|
rqstp->rq_resbuf.len<<2);
|
|
|
rqstp->rq_resbuf.buf = rqstp->rq_resbuf.base;
|
rqstp->rq_resbuf.buf = rqstp->rq_resbuf.base;
|
rqstp->rq_resbuf.len = 0;
|
rqstp->rq_resbuf.len = 0;
|
svc_reserve(rqstp, 0);
|
svc_reserve(rqstp, 0);
|
rqstp->rq_sock = NULL;
|
rqstp->rq_sock = NULL;
|
|
|
svc_sock_put(svsk);
|
svc_sock_put(svsk);
|
}
|
}
|
|
|
/*
|
/*
|
* External function to wake up a server waiting for data
|
* External function to wake up a server waiting for data
|
*/
|
*/
|
void
|
void
|
svc_wake_up(struct svc_serv *serv)
|
svc_wake_up(struct svc_serv *serv)
|
{
|
{
|
struct svc_rqst *rqstp;
|
struct svc_rqst *rqstp;
|
|
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
if (!list_empty(&serv->sv_threads)) {
|
if (!list_empty(&serv->sv_threads)) {
|
rqstp = list_entry(serv->sv_threads.next,
|
rqstp = list_entry(serv->sv_threads.next,
|
struct svc_rqst,
|
struct svc_rqst,
|
rq_list);
|
rq_list);
|
dprintk("svc: daemon %p woken up.\n", rqstp);
|
dprintk("svc: daemon %p woken up.\n", rqstp);
|
/*
|
/*
|
svc_serv_dequeue(serv, rqstp);
|
svc_serv_dequeue(serv, rqstp);
|
rqstp->rq_sock = NULL;
|
rqstp->rq_sock = NULL;
|
*/
|
*/
|
wake_up(&rqstp->rq_wait);
|
wake_up(&rqstp->rq_wait);
|
}
|
}
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
}
|
}
|
|
|
/*
|
/*
|
* Generic sendto routine
|
* Generic sendto routine
|
*/
|
*/
|
static int
|
static int
|
svc_sendto(struct svc_rqst *rqstp, struct iovec *iov, int nr)
|
svc_sendto(struct svc_rqst *rqstp, struct iovec *iov, int nr)
|
{
|
{
|
mm_segment_t oldfs;
|
mm_segment_t oldfs;
|
struct svc_sock *svsk = rqstp->rq_sock;
|
struct svc_sock *svsk = rqstp->rq_sock;
|
struct socket *sock = svsk->sk_sock;
|
struct socket *sock = svsk->sk_sock;
|
struct msghdr msg;
|
struct msghdr msg;
|
char buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];
|
char buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];
|
struct cmsghdr *cmh = (struct cmsghdr *)buffer;
|
struct cmsghdr *cmh = (struct cmsghdr *)buffer;
|
struct in_pktinfo *pki = (struct in_pktinfo *)CMSG_DATA(cmh);
|
struct in_pktinfo *pki = (struct in_pktinfo *)CMSG_DATA(cmh);
|
int i, buflen, len;
|
int i, buflen, len;
|
|
|
for (i = buflen = 0; i < nr; i++)
|
for (i = buflen = 0; i < nr; i++)
|
buflen += iov[i].iov_len;
|
buflen += iov[i].iov_len;
|
|
|
msg.msg_name = &rqstp->rq_addr;
|
msg.msg_name = &rqstp->rq_addr;
|
msg.msg_namelen = sizeof(rqstp->rq_addr);
|
msg.msg_namelen = sizeof(rqstp->rq_addr);
|
msg.msg_iov = iov;
|
msg.msg_iov = iov;
|
msg.msg_iovlen = nr;
|
msg.msg_iovlen = nr;
|
if (rqstp->rq_prot == IPPROTO_UDP) {
|
if (rqstp->rq_prot == IPPROTO_UDP) {
|
msg.msg_control = cmh;
|
msg.msg_control = cmh;
|
msg.msg_controllen = sizeof(buffer);
|
msg.msg_controllen = sizeof(buffer);
|
cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
|
cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
|
cmh->cmsg_level = SOL_IP;
|
cmh->cmsg_level = SOL_IP;
|
cmh->cmsg_type = IP_PKTINFO;
|
cmh->cmsg_type = IP_PKTINFO;
|
pki->ipi_ifindex = 0;
|
pki->ipi_ifindex = 0;
|
pki->ipi_spec_dst.s_addr = rqstp->rq_daddr;
|
pki->ipi_spec_dst.s_addr = rqstp->rq_daddr;
|
} else {
|
} else {
|
msg.msg_control = NULL;
|
msg.msg_control = NULL;
|
msg.msg_controllen = 0;
|
msg.msg_controllen = 0;
|
}
|
}
|
|
|
/* This was MSG_DONTWAIT, but I now want it to wait.
|
/* This was MSG_DONTWAIT, but I now want it to wait.
|
* The only thing that it would wait for is memory and
|
* The only thing that it would wait for is memory and
|
* if we are fairly low on memory, then we aren't likely
|
* if we are fairly low on memory, then we aren't likely
|
* to make much progress anyway.
|
* to make much progress anyway.
|
* sk->sndtimeo is set to 30seconds just in case.
|
* sk->sndtimeo is set to 30seconds just in case.
|
*/
|
*/
|
msg.msg_flags = 0;
|
msg.msg_flags = 0;
|
|
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
len = sock_sendmsg(sock, &msg, buflen);
|
len = sock_sendmsg(sock, &msg, buflen);
|
set_fs(oldfs);
|
set_fs(oldfs);
|
|
|
dprintk("svc: socket %p sendto([%p %Zu... ], %d, %d) = %d\n",
|
dprintk("svc: socket %p sendto([%p %Zu... ], %d, %d) = %d\n",
|
rqstp->rq_sock, iov[0].iov_base, iov[0].iov_len, nr, buflen, len);
|
rqstp->rq_sock, iov[0].iov_base, iov[0].iov_len, nr, buflen, len);
|
|
|
return len;
|
return len;
|
}
|
}
|
|
|
/*
|
/*
|
* Check input queue length
|
* Check input queue length
|
*/
|
*/
|
static int
|
static int
|
svc_recv_available(struct svc_sock *svsk)
|
svc_recv_available(struct svc_sock *svsk)
|
{
|
{
|
mm_segment_t oldfs;
|
mm_segment_t oldfs;
|
struct socket *sock = svsk->sk_sock;
|
struct socket *sock = svsk->sk_sock;
|
int avail, err;
|
int avail, err;
|
|
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
err = sock->ops->ioctl(sock, TIOCINQ, (unsigned long) &avail);
|
err = sock->ops->ioctl(sock, TIOCINQ, (unsigned long) &avail);
|
set_fs(oldfs);
|
set_fs(oldfs);
|
|
|
return (err >= 0)? avail : err;
|
return (err >= 0)? avail : err;
|
}
|
}
|
|
|
/*
|
/*
|
* Generic recvfrom routine.
|
* Generic recvfrom routine.
|
*/
|
*/
|
static int
|
static int
|
svc_recvfrom(struct svc_rqst *rqstp, struct iovec *iov, int nr, int buflen)
|
svc_recvfrom(struct svc_rqst *rqstp, struct iovec *iov, int nr, int buflen)
|
{
|
{
|
mm_segment_t oldfs;
|
mm_segment_t oldfs;
|
struct msghdr msg;
|
struct msghdr msg;
|
struct socket *sock;
|
struct socket *sock;
|
int len, alen;
|
int len, alen;
|
|
|
rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
|
rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
|
sock = rqstp->rq_sock->sk_sock;
|
sock = rqstp->rq_sock->sk_sock;
|
|
|
msg.msg_name = &rqstp->rq_addr;
|
msg.msg_name = &rqstp->rq_addr;
|
msg.msg_namelen = sizeof(rqstp->rq_addr);
|
msg.msg_namelen = sizeof(rqstp->rq_addr);
|
msg.msg_iov = iov;
|
msg.msg_iov = iov;
|
msg.msg_iovlen = nr;
|
msg.msg_iovlen = nr;
|
msg.msg_control = NULL;
|
msg.msg_control = NULL;
|
msg.msg_controllen = 0;
|
msg.msg_controllen = 0;
|
|
|
msg.msg_flags = MSG_DONTWAIT;
|
msg.msg_flags = MSG_DONTWAIT;
|
|
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
len = sock_recvmsg(sock, &msg, buflen, MSG_DONTWAIT);
|
len = sock_recvmsg(sock, &msg, buflen, MSG_DONTWAIT);
|
set_fs(oldfs);
|
set_fs(oldfs);
|
|
|
/* sock_recvmsg doesn't fill in the name/namelen, so we must..
|
/* sock_recvmsg doesn't fill in the name/namelen, so we must..
|
* possibly we should cache this in the svc_sock structure
|
* possibly we should cache this in the svc_sock structure
|
* at accept time. FIXME
|
* at accept time. FIXME
|
*/
|
*/
|
alen = sizeof(rqstp->rq_addr);
|
alen = sizeof(rqstp->rq_addr);
|
sock->ops->getname(sock, (struct sockaddr *)&rqstp->rq_addr, &alen, 1);
|
sock->ops->getname(sock, (struct sockaddr *)&rqstp->rq_addr, &alen, 1);
|
|
|
dprintk("svc: socket %p recvfrom(%p, %Zu) = %d\n",
|
dprintk("svc: socket %p recvfrom(%p, %Zu) = %d\n",
|
rqstp->rq_sock, iov[0].iov_base, iov[0].iov_len, len);
|
rqstp->rq_sock, iov[0].iov_base, iov[0].iov_len, len);
|
|
|
return len;
|
return len;
|
}
|
}
|
|
|
/*
|
/*
|
* Set socket snd and rcv buffer lengths
|
* Set socket snd and rcv buffer lengths
|
*/
|
*/
|
static inline void
|
static inline void
|
svc_sock_setbufsize(struct socket *sock, unsigned int snd, unsigned int rcv)
|
svc_sock_setbufsize(struct socket *sock, unsigned int snd, unsigned int rcv)
|
{
|
{
|
#if 0
|
#if 0
|
mm_segment_t oldfs;
|
mm_segment_t oldfs;
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
oldfs = get_fs(); set_fs(KERNEL_DS);
|
sock_setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
|
sock_setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
|
(char*)&snd, sizeof(snd));
|
(char*)&snd, sizeof(snd));
|
sock_setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
|
sock_setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
|
(char*)&rcv, sizeof(rcv));
|
(char*)&rcv, sizeof(rcv));
|
#else
|
#else
|
/* sock_setsockopt limits use to sysctl_?mem_max,
|
/* sock_setsockopt limits use to sysctl_?mem_max,
|
* which isn't acceptable. Until that is made conditional
|
* which isn't acceptable. Until that is made conditional
|
* on not having CAP_SYS_RESOURCE or similar, we go direct...
|
* on not having CAP_SYS_RESOURCE or similar, we go direct...
|
* DaveM said I could!
|
* DaveM said I could!
|
*/
|
*/
|
lock_sock(sock->sk);
|
lock_sock(sock->sk);
|
sock->sk->sndbuf = snd * 2;
|
sock->sk->sndbuf = snd * 2;
|
sock->sk->rcvbuf = rcv * 2;
|
sock->sk->rcvbuf = rcv * 2;
|
sock->sk->userlocks |= SOCK_SNDBUF_LOCK|SOCK_RCVBUF_LOCK;
|
sock->sk->userlocks |= SOCK_SNDBUF_LOCK|SOCK_RCVBUF_LOCK;
|
release_sock(sock->sk);
|
release_sock(sock->sk);
|
#endif
|
#endif
|
}
|
}
|
/*
|
/*
|
* INET callback when data has been received on the socket.
|
* INET callback when data has been received on the socket.
|
*/
|
*/
|
static void
|
static void
|
svc_udp_data_ready(struct sock *sk, int count)
|
svc_udp_data_ready(struct sock *sk, int count)
|
{
|
{
|
struct svc_sock *svsk = (struct svc_sock *)(sk->user_data);
|
struct svc_sock *svsk = (struct svc_sock *)(sk->user_data);
|
|
|
if (!svsk)
|
if (!svsk)
|
goto out;
|
goto out;
|
dprintk("svc: socket %p(inet %p), count=%d, busy=%d\n",
|
dprintk("svc: socket %p(inet %p), count=%d, busy=%d\n",
|
svsk, sk, count, test_bit(SK_BUSY, &svsk->sk_flags));
|
svsk, sk, count, test_bit(SK_BUSY, &svsk->sk_flags));
|
set_bit(SK_DATA, &svsk->sk_flags);
|
set_bit(SK_DATA, &svsk->sk_flags);
|
svc_sock_enqueue(svsk);
|
svc_sock_enqueue(svsk);
|
out:
|
out:
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
wake_up_interruptible(sk->sleep);
|
wake_up_interruptible(sk->sleep);
|
}
|
}
|
|
|
/*
|
/*
|
* INET callback when space is newly available on the socket.
|
* INET callback when space is newly available on the socket.
|
*/
|
*/
|
static void
|
static void
|
svc_write_space(struct sock *sk)
|
svc_write_space(struct sock *sk)
|
{
|
{
|
struct svc_sock *svsk = (struct svc_sock *)(sk->user_data);
|
struct svc_sock *svsk = (struct svc_sock *)(sk->user_data);
|
|
|
if (svsk) {
|
if (svsk) {
|
dprintk("svc: socket %p(inet %p), write_space busy=%d\n",
|
dprintk("svc: socket %p(inet %p), write_space busy=%d\n",
|
svsk, sk, test_bit(SK_BUSY, &svsk->sk_flags));
|
svsk, sk, test_bit(SK_BUSY, &svsk->sk_flags));
|
svc_sock_enqueue(svsk);
|
svc_sock_enqueue(svsk);
|
}
|
}
|
|
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
wake_up_interruptible(sk->sleep);
|
wake_up_interruptible(sk->sleep);
|
}
|
}
|
|
|
/*
|
/*
|
* Receive a datagram from a UDP socket.
|
* Receive a datagram from a UDP socket.
|
*/
|
*/
|
static int
|
static int
|
svc_udp_recvfrom(struct svc_rqst *rqstp)
|
svc_udp_recvfrom(struct svc_rqst *rqstp)
|
{
|
{
|
struct svc_sock *svsk = rqstp->rq_sock;
|
struct svc_sock *svsk = rqstp->rq_sock;
|
struct svc_serv *serv = svsk->sk_server;
|
struct svc_serv *serv = svsk->sk_server;
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
u32 *data;
|
u32 *data;
|
int err, len;
|
int err, len;
|
|
|
if (test_and_clear_bit(SK_CHNGBUF, &svsk->sk_flags))
|
if (test_and_clear_bit(SK_CHNGBUF, &svsk->sk_flags))
|
/* udp sockets need large rcvbuf as all pending
|
/* udp sockets need large rcvbuf as all pending
|
* requests are still in that buffer. sndbuf must
|
* requests are still in that buffer. sndbuf must
|
* also be large enough that there is enough space
|
* also be large enough that there is enough space
|
* for one reply per thread.
|
* for one reply per thread.
|
*/
|
*/
|
svc_sock_setbufsize(svsk->sk_sock,
|
svc_sock_setbufsize(svsk->sk_sock,
|
(serv->sv_nrthreads+3)* serv->sv_bufsz,
|
(serv->sv_nrthreads+3)* serv->sv_bufsz,
|
(serv->sv_nrthreads+3)* serv->sv_bufsz);
|
(serv->sv_nrthreads+3)* serv->sv_bufsz);
|
|
|
clear_bit(SK_DATA, &svsk->sk_flags);
|
clear_bit(SK_DATA, &svsk->sk_flags);
|
while ((skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err)) == NULL) {
|
while ((skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err)) == NULL) {
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
if (err == -EAGAIN)
|
if (err == -EAGAIN)
|
return err;
|
return err;
|
/* possibly an icmp error */
|
/* possibly an icmp error */
|
dprintk("svc: recvfrom returned error %d\n", -err);
|
dprintk("svc: recvfrom returned error %d\n", -err);
|
}
|
}
|
set_bit(SK_DATA, &svsk->sk_flags); /* there may be more data... */
|
set_bit(SK_DATA, &svsk->sk_flags); /* there may be more data... */
|
|
|
/* Sorry. */
|
/* Sorry. */
|
if (skb_is_nonlinear(skb)) {
|
if (skb_is_nonlinear(skb)) {
|
if (skb_linearize(skb, GFP_KERNEL) != 0) {
|
if (skb_linearize(skb, GFP_KERNEL) != 0) {
|
kfree_skb(skb);
|
kfree_skb(skb);
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
|
|
if (skb->ip_summed != CHECKSUM_UNNECESSARY) {
|
if (skb->ip_summed != CHECKSUM_UNNECESSARY) {
|
if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) {
|
if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) {
|
skb_free_datagram(svsk->sk_sk, skb);
|
skb_free_datagram(svsk->sk_sk, skb);
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
|
|
|
|
len = skb->len - sizeof(struct udphdr);
|
len = skb->len - sizeof(struct udphdr);
|
data = (u32 *) (skb->data + sizeof(struct udphdr));
|
data = (u32 *) (skb->data + sizeof(struct udphdr));
|
|
|
rqstp->rq_skbuff = skb;
|
rqstp->rq_skbuff = skb;
|
rqstp->rq_argbuf.base = data;
|
rqstp->rq_argbuf.base = data;
|
rqstp->rq_argbuf.buf = data;
|
rqstp->rq_argbuf.buf = data;
|
rqstp->rq_argbuf.len = (len >> 2);
|
rqstp->rq_argbuf.len = (len >> 2);
|
/* rqstp->rq_resbuf = rqstp->rq_defbuf; */
|
/* rqstp->rq_resbuf = rqstp->rq_defbuf; */
|
rqstp->rq_prot = IPPROTO_UDP;
|
rqstp->rq_prot = IPPROTO_UDP;
|
|
|
/* Get sender address */
|
/* Get sender address */
|
rqstp->rq_addr.sin_family = AF_INET;
|
rqstp->rq_addr.sin_family = AF_INET;
|
rqstp->rq_addr.sin_port = skb->h.uh->source;
|
rqstp->rq_addr.sin_port = skb->h.uh->source;
|
rqstp->rq_addr.sin_addr.s_addr = skb->nh.iph->saddr;
|
rqstp->rq_addr.sin_addr.s_addr = skb->nh.iph->saddr;
|
rqstp->rq_daddr = skb->nh.iph->daddr;
|
rqstp->rq_daddr = skb->nh.iph->daddr;
|
|
|
if (serv->sv_stats)
|
if (serv->sv_stats)
|
serv->sv_stats->netudpcnt++;
|
serv->sv_stats->netudpcnt++;
|
|
|
/* One down, maybe more to go... */
|
/* One down, maybe more to go... */
|
svsk->sk_sk->stamp = skb->stamp;
|
svsk->sk_sk->stamp = skb->stamp;
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
|
|
return len;
|
return len;
|
}
|
}
|
|
|
static int
|
static int
|
svc_udp_sendto(struct svc_rqst *rqstp)
|
svc_udp_sendto(struct svc_rqst *rqstp)
|
{
|
{
|
struct svc_buf *bufp = &rqstp->rq_resbuf;
|
struct svc_buf *bufp = &rqstp->rq_resbuf;
|
int error;
|
int error;
|
|
|
/* Set up the first element of the reply iovec.
|
/* Set up the first element of the reply iovec.
|
* Any other iovecs that may be in use have been taken
|
* Any other iovecs that may be in use have been taken
|
* care of by the server implementation itself.
|
* care of by the server implementation itself.
|
*/
|
*/
|
/* bufp->base = bufp->area; */
|
/* bufp->base = bufp->area; */
|
bufp->iov[0].iov_base = bufp->base;
|
bufp->iov[0].iov_base = bufp->base;
|
bufp->iov[0].iov_len = bufp->len << 2;
|
bufp->iov[0].iov_len = bufp->len << 2;
|
|
|
error = svc_sendto(rqstp, bufp->iov, bufp->nriov);
|
error = svc_sendto(rqstp, bufp->iov, bufp->nriov);
|
if (error == -ECONNREFUSED)
|
if (error == -ECONNREFUSED)
|
/* ICMP error on earlier request. */
|
/* ICMP error on earlier request. */
|
error = svc_sendto(rqstp, bufp->iov, bufp->nriov);
|
error = svc_sendto(rqstp, bufp->iov, bufp->nriov);
|
|
|
return error;
|
return error;
|
}
|
}
|
|
|
static int
|
static int
|
svc_udp_init(struct svc_sock *svsk)
|
svc_udp_init(struct svc_sock *svsk)
|
{
|
{
|
svsk->sk_sk->data_ready = svc_udp_data_ready;
|
svsk->sk_sk->data_ready = svc_udp_data_ready;
|
svsk->sk_sk->write_space = svc_write_space;
|
svsk->sk_sk->write_space = svc_write_space;
|
svsk->sk_recvfrom = svc_udp_recvfrom;
|
svsk->sk_recvfrom = svc_udp_recvfrom;
|
svsk->sk_sendto = svc_udp_sendto;
|
svsk->sk_sendto = svc_udp_sendto;
|
|
|
/* initialise setting must have enough space to
|
/* initialise setting must have enough space to
|
* receive and respond to one request.
|
* receive and respond to one request.
|
* svc_udp_recvfrom will re-adjust if necessary
|
* svc_udp_recvfrom will re-adjust if necessary
|
*/
|
*/
|
svc_sock_setbufsize(svsk->sk_sock,
|
svc_sock_setbufsize(svsk->sk_sock,
|
3 * svsk->sk_server->sv_bufsz,
|
3 * svsk->sk_server->sv_bufsz,
|
3 * svsk->sk_server->sv_bufsz);
|
3 * svsk->sk_server->sv_bufsz);
|
|
|
set_bit(SK_CHNGBUF, &svsk->sk_flags);
|
set_bit(SK_CHNGBUF, &svsk->sk_flags);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* A data_ready event on a listening socket means there's a connection
|
* A data_ready event on a listening socket means there's a connection
|
* pending. Do not use state_change as a substitute for it.
|
* pending. Do not use state_change as a substitute for it.
|
*/
|
*/
|
static void
|
static void
|
svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
|
svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
|
{
|
{
|
struct svc_sock *svsk;
|
struct svc_sock *svsk;
|
|
|
dprintk("svc: socket %p TCP (listen) state change %d\n",
|
dprintk("svc: socket %p TCP (listen) state change %d\n",
|
sk, sk->state);
|
sk, sk->state);
|
|
|
if (sk->state != TCP_LISTEN) {
|
if (sk->state != TCP_LISTEN) {
|
/*
|
/*
|
* This callback may called twice when a new connection
|
* This callback may called twice when a new connection
|
* is established as a child socket inherits everything
|
* is established as a child socket inherits everything
|
* from a parent LISTEN socket.
|
* from a parent LISTEN socket.
|
* 1) data_ready method of the parent socket will be called
|
* 1) data_ready method of the parent socket will be called
|
* when one of child sockets become ESTABLISHED.
|
* when one of child sockets become ESTABLISHED.
|
* 2) data_ready method of the child socket may be called
|
* 2) data_ready method of the child socket may be called
|
* when it receives data before the socket is accepted.
|
* when it receives data before the socket is accepted.
|
* In case of 2, we should ignore it silently.
|
* In case of 2, we should ignore it silently.
|
*/
|
*/
|
goto out;
|
goto out;
|
}
|
}
|
if (!(svsk = (struct svc_sock *) sk->user_data)) {
|
if (!(svsk = (struct svc_sock *) sk->user_data)) {
|
printk("svc: socket %p: no user data\n", sk);
|
printk("svc: socket %p: no user data\n", sk);
|
goto out;
|
goto out;
|
}
|
}
|
set_bit(SK_CONN, &svsk->sk_flags);
|
set_bit(SK_CONN, &svsk->sk_flags);
|
svc_sock_enqueue(svsk);
|
svc_sock_enqueue(svsk);
|
out:
|
out:
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
wake_up_interruptible_all(sk->sleep);
|
wake_up_interruptible_all(sk->sleep);
|
}
|
}
|
|
|
/*
|
/*
|
* A state change on a connected socket means it's dying or dead.
|
* A state change on a connected socket means it's dying or dead.
|
*/
|
*/
|
static void
|
static void
|
svc_tcp_state_change(struct sock *sk)
|
svc_tcp_state_change(struct sock *sk)
|
{
|
{
|
struct svc_sock *svsk;
|
struct svc_sock *svsk;
|
|
|
dprintk("svc: socket %p TCP (connected) state change %d (svsk %p)\n",
|
dprintk("svc: socket %p TCP (connected) state change %d (svsk %p)\n",
|
sk, sk->state, sk->user_data);
|
sk, sk->state, sk->user_data);
|
|
|
if (!(svsk = (struct svc_sock *) sk->user_data)) {
|
if (!(svsk = (struct svc_sock *) sk->user_data)) {
|
printk("svc: socket %p: no user data\n", sk);
|
printk("svc: socket %p: no user data\n", sk);
|
goto out;
|
goto out;
|
}
|
}
|
set_bit(SK_CLOSE, &svsk->sk_flags);
|
set_bit(SK_CLOSE, &svsk->sk_flags);
|
svc_sock_enqueue(svsk);
|
svc_sock_enqueue(svsk);
|
out:
|
out:
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
wake_up_interruptible_all(sk->sleep);
|
wake_up_interruptible_all(sk->sleep);
|
}
|
}
|
|
|
static void
|
static void
|
svc_tcp_data_ready(struct sock *sk, int count)
|
svc_tcp_data_ready(struct sock *sk, int count)
|
{
|
{
|
struct svc_sock * svsk;
|
struct svc_sock * svsk;
|
|
|
dprintk("svc: socket %p TCP data ready (svsk %p)\n",
|
dprintk("svc: socket %p TCP data ready (svsk %p)\n",
|
sk, sk->user_data);
|
sk, sk->user_data);
|
if (!(svsk = (struct svc_sock *)(sk->user_data)))
|
if (!(svsk = (struct svc_sock *)(sk->user_data)))
|
goto out;
|
goto out;
|
set_bit(SK_DATA, &svsk->sk_flags);
|
set_bit(SK_DATA, &svsk->sk_flags);
|
svc_sock_enqueue(svsk);
|
svc_sock_enqueue(svsk);
|
out:
|
out:
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
if (sk->sleep && waitqueue_active(sk->sleep))
|
wake_up_interruptible(sk->sleep);
|
wake_up_interruptible(sk->sleep);
|
}
|
}
|
|
|
/*
|
/*
|
* Accept a TCP connection
|
* Accept a TCP connection
|
*/
|
*/
|
static void
|
static void
|
svc_tcp_accept(struct svc_sock *svsk)
|
svc_tcp_accept(struct svc_sock *svsk)
|
{
|
{
|
struct sockaddr_in sin;
|
struct sockaddr_in sin;
|
struct svc_serv *serv = svsk->sk_server;
|
struct svc_serv *serv = svsk->sk_server;
|
struct socket *sock = svsk->sk_sock;
|
struct socket *sock = svsk->sk_sock;
|
struct socket *newsock;
|
struct socket *newsock;
|
struct proto_ops *ops;
|
struct proto_ops *ops;
|
struct svc_sock *newsvsk;
|
struct svc_sock *newsvsk;
|
int err, slen;
|
int err, slen;
|
|
|
dprintk("svc: tcp_accept %p sock %p\n", svsk, sock);
|
dprintk("svc: tcp_accept %p sock %p\n", svsk, sock);
|
if (!sock)
|
if (!sock)
|
return;
|
return;
|
|
|
if (!(newsock = sock_alloc())) {
|
if (!(newsock = sock_alloc())) {
|
printk(KERN_WARNING "%s: no more sockets!\n", serv->sv_name);
|
printk(KERN_WARNING "%s: no more sockets!\n", serv->sv_name);
|
return;
|
return;
|
}
|
}
|
dprintk("svc: tcp_accept %p allocated\n", newsock);
|
dprintk("svc: tcp_accept %p allocated\n", newsock);
|
|
|
newsock->type = sock->type;
|
newsock->type = sock->type;
|
newsock->ops = ops = sock->ops;
|
newsock->ops = ops = sock->ops;
|
|
|
clear_bit(SK_CONN, &svsk->sk_flags);
|
clear_bit(SK_CONN, &svsk->sk_flags);
|
if ((err = ops->accept(sock, newsock, O_NONBLOCK)) < 0) {
|
if ((err = ops->accept(sock, newsock, O_NONBLOCK)) < 0) {
|
if (err != -EAGAIN && net_ratelimit())
|
if (err != -EAGAIN && net_ratelimit())
|
printk(KERN_WARNING "%s: accept failed (err %d)!\n",
|
printk(KERN_WARNING "%s: accept failed (err %d)!\n",
|
serv->sv_name, -err);
|
serv->sv_name, -err);
|
goto failed; /* aborted connection or whatever */
|
goto failed; /* aborted connection or whatever */
|
}
|
}
|
set_bit(SK_CONN, &svsk->sk_flags);
|
set_bit(SK_CONN, &svsk->sk_flags);
|
svc_sock_enqueue(svsk);
|
svc_sock_enqueue(svsk);
|
|
|
slen = sizeof(sin);
|
slen = sizeof(sin);
|
err = ops->getname(newsock, (struct sockaddr *) &sin, &slen, 1);
|
err = ops->getname(newsock, (struct sockaddr *) &sin, &slen, 1);
|
if (err < 0) {
|
if (err < 0) {
|
if (net_ratelimit())
|
if (net_ratelimit())
|
printk(KERN_WARNING "%s: peername failed (err %d)!\n",
|
printk(KERN_WARNING "%s: peername failed (err %d)!\n",
|
serv->sv_name, -err);
|
serv->sv_name, -err);
|
goto failed; /* aborted connection or whatever */
|
goto failed; /* aborted connection or whatever */
|
}
|
}
|
|
|
/* Ideally, we would want to reject connections from unauthorized
|
/* Ideally, we would want to reject connections from unauthorized
|
* hosts here, but when we get encription, the IP of the host won't
|
* hosts here, but when we get encription, the IP of the host won't
|
* tell us anything. For now just warn about unpriv connections.
|
* tell us anything. For now just warn about unpriv connections.
|
*/
|
*/
|
if (ntohs(sin.sin_port) >= 1024) {
|
if (ntohs(sin.sin_port) >= 1024) {
|
dprintk(KERN_WARNING
|
dprintk(KERN_WARNING
|
"%s: connect from unprivileged port: %u.%u.%u.%u:%d\n",
|
"%s: connect from unprivileged port: %u.%u.%u.%u:%d\n",
|
serv->sv_name,
|
serv->sv_name,
|
NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port));
|
NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port));
|
}
|
}
|
|
|
dprintk("%s: connect from %u.%u.%u.%u:%04x\n", serv->sv_name,
|
dprintk("%s: connect from %u.%u.%u.%u:%04x\n", serv->sv_name,
|
NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port));
|
NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port));
|
|
|
if (!(newsvsk = svc_setup_socket(serv, newsock, &err, 0)))
|
if (!(newsvsk = svc_setup_socket(serv, newsock, &err, 0)))
|
goto failed;
|
goto failed;
|
|
|
/* make sure that a write doesn't block forever when
|
/* make sure that a write doesn't block forever when
|
* low on memory
|
* low on memory
|
*/
|
*/
|
newsock->sk->sndtimeo = HZ*30;
|
newsock->sk->sndtimeo = HZ*30;
|
|
|
/* Precharge. Data may have arrived on the socket before we
|
/* Precharge. Data may have arrived on the socket before we
|
* installed the data_ready callback.
|
* installed the data_ready callback.
|
*/
|
*/
|
set_bit(SK_DATA, &newsvsk->sk_flags);
|
set_bit(SK_DATA, &newsvsk->sk_flags);
|
svc_sock_enqueue(newsvsk);
|
svc_sock_enqueue(newsvsk);
|
|
|
/* make sure that we don't have too many active connections.
|
/* make sure that we don't have too many active connections.
|
* If we have, something must be dropped.
|
* If we have, something must be dropped.
|
* We randomly choose between newest and oldest (in terms
|
* We randomly choose between newest and oldest (in terms
|
* of recent activity) and drop it.
|
* of recent activity) and drop it.
|
*/
|
*/
|
if (serv->sv_tmpcnt > (serv->sv_nrthreads+3)*10) {
|
if (serv->sv_tmpcnt > (serv->sv_nrthreads+3)*10) {
|
struct svc_sock *svsk = NULL;
|
struct svc_sock *svsk = NULL;
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
if (!list_empty(&serv->sv_tempsocks)) {
|
if (!list_empty(&serv->sv_tempsocks)) {
|
if (net_random()&1)
|
if (net_random()&1)
|
svsk = list_entry(serv->sv_tempsocks.prev,
|
svsk = list_entry(serv->sv_tempsocks.prev,
|
struct svc_sock,
|
struct svc_sock,
|
sk_list);
|
sk_list);
|
else
|
else
|
svsk = list_entry(serv->sv_tempsocks.next,
|
svsk = list_entry(serv->sv_tempsocks.next,
|
struct svc_sock,
|
struct svc_sock,
|
sk_list);
|
sk_list);
|
set_bit(SK_CLOSE, &svsk->sk_flags);
|
set_bit(SK_CLOSE, &svsk->sk_flags);
|
svsk->sk_inuse ++;
|
svsk->sk_inuse ++;
|
}
|
}
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
|
|
if (svsk) {
|
if (svsk) {
|
svc_sock_enqueue(svsk);
|
svc_sock_enqueue(svsk);
|
svc_sock_put(svsk);
|
svc_sock_put(svsk);
|
}
|
}
|
|
|
}
|
}
|
|
|
if (serv->sv_stats)
|
if (serv->sv_stats)
|
serv->sv_stats->nettcpconn++;
|
serv->sv_stats->nettcpconn++;
|
|
|
return;
|
return;
|
|
|
failed:
|
failed:
|
sock_release(newsock);
|
sock_release(newsock);
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* Receive data from a TCP socket.
|
* Receive data from a TCP socket.
|
*/
|
*/
|
static int
|
static int
|
svc_tcp_recvfrom(struct svc_rqst *rqstp)
|
svc_tcp_recvfrom(struct svc_rqst *rqstp)
|
{
|
{
|
struct svc_sock *svsk = rqstp->rq_sock;
|
struct svc_sock *svsk = rqstp->rq_sock;
|
struct svc_serv *serv = svsk->sk_server;
|
struct svc_serv *serv = svsk->sk_server;
|
struct svc_buf *bufp = &rqstp->rq_argbuf;
|
struct svc_buf *bufp = &rqstp->rq_argbuf;
|
int len;
|
int len;
|
|
|
dprintk("svc: tcp_recv %p data %d conn %d close %d\n",
|
dprintk("svc: tcp_recv %p data %d conn %d close %d\n",
|
svsk, test_bit(SK_DATA, &svsk->sk_flags),
|
svsk, test_bit(SK_DATA, &svsk->sk_flags),
|
test_bit(SK_CONN, &svsk->sk_flags),
|
test_bit(SK_CONN, &svsk->sk_flags),
|
test_bit(SK_CLOSE, &svsk->sk_flags));
|
test_bit(SK_CLOSE, &svsk->sk_flags));
|
|
|
if (test_bit(SK_CLOSE, &svsk->sk_flags)) {
|
if (test_bit(SK_CLOSE, &svsk->sk_flags)) {
|
svc_delete_socket(svsk);
|
svc_delete_socket(svsk);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if (test_bit(SK_CONN, &svsk->sk_flags)) {
|
if (test_bit(SK_CONN, &svsk->sk_flags)) {
|
svc_tcp_accept(svsk);
|
svc_tcp_accept(svsk);
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if (test_and_clear_bit(SK_CHNGBUF, &svsk->sk_flags))
|
if (test_and_clear_bit(SK_CHNGBUF, &svsk->sk_flags))
|
/* sndbuf needs to have room for one request
|
/* sndbuf needs to have room for one request
|
* per thread, otherwise we can stall even when the
|
* per thread, otherwise we can stall even when the
|
* network isn't a bottleneck.
|
* network isn't a bottleneck.
|
* rcvbuf just needs to be able to hold a few requests.
|
* rcvbuf just needs to be able to hold a few requests.
|
* Normally they will be removed from the queue
|
* Normally they will be removed from the queue
|
* as soon as a complete request arrives.
|
* as soon as a complete request arrives.
|
*/
|
*/
|
svc_sock_setbufsize(svsk->sk_sock,
|
svc_sock_setbufsize(svsk->sk_sock,
|
(serv->sv_nrthreads+3) *
|
(serv->sv_nrthreads+3) *
|
serv->sv_bufsz,
|
serv->sv_bufsz,
|
3 * serv->sv_bufsz);
|
3 * serv->sv_bufsz);
|
|
|
clear_bit(SK_DATA, &svsk->sk_flags);
|
clear_bit(SK_DATA, &svsk->sk_flags);
|
|
|
/* Receive data. If we haven't got the record length yet, get
|
/* Receive data. If we haven't got the record length yet, get
|
* the next four bytes. Otherwise try to gobble up as much as
|
* the next four bytes. Otherwise try to gobble up as much as
|
* possible up to the complete record length.
|
* possible up to the complete record length.
|
*/
|
*/
|
if (svsk->sk_tcplen < 4) {
|
if (svsk->sk_tcplen < 4) {
|
unsigned long want = 4 - svsk->sk_tcplen;
|
unsigned long want = 4 - svsk->sk_tcplen;
|
struct iovec iov;
|
struct iovec iov;
|
|
|
iov.iov_base = ((char *) &svsk->sk_reclen) + svsk->sk_tcplen;
|
iov.iov_base = ((char *) &svsk->sk_reclen) + svsk->sk_tcplen;
|
iov.iov_len = want;
|
iov.iov_len = want;
|
if ((len = svc_recvfrom(rqstp, &iov, 1, want)) < 0)
|
if ((len = svc_recvfrom(rqstp, &iov, 1, want)) < 0)
|
goto error;
|
goto error;
|
svsk->sk_tcplen += len;
|
svsk->sk_tcplen += len;
|
if (len < want) {
|
if (len < want) {
|
dprintk("svc: short recvfrom while reading record length (%d of %ld)\n",
|
dprintk("svc: short recvfrom while reading record length (%d of %ld)\n",
|
len, want);
|
len, want);
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
return -EAGAIN; /* record header not complete */
|
return -EAGAIN; /* record header not complete */
|
}
|
}
|
|
|
svsk->sk_reclen = ntohl(svsk->sk_reclen);
|
svsk->sk_reclen = ntohl(svsk->sk_reclen);
|
if (!(svsk->sk_reclen & 0x80000000)) {
|
if (!(svsk->sk_reclen & 0x80000000)) {
|
/* FIXME: technically, a record can be fragmented,
|
/* FIXME: technically, a record can be fragmented,
|
* and non-terminal fragments will not have the top
|
* and non-terminal fragments will not have the top
|
* bit set in the fragment length header.
|
* bit set in the fragment length header.
|
* But apparently no known nfs clients send fragmented
|
* But apparently no known nfs clients send fragmented
|
* records. */
|
* records. */
|
printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx (non-terminal)\n",
|
printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx (non-terminal)\n",
|
(unsigned long) svsk->sk_reclen);
|
(unsigned long) svsk->sk_reclen);
|
goto err_delete;
|
goto err_delete;
|
}
|
}
|
svsk->sk_reclen &= 0x7fffffff;
|
svsk->sk_reclen &= 0x7fffffff;
|
dprintk("svc: TCP record, %d bytes\n", svsk->sk_reclen);
|
dprintk("svc: TCP record, %d bytes\n", svsk->sk_reclen);
|
if (svsk->sk_reclen > (bufp->buflen<<2)) {
|
if (svsk->sk_reclen > (bufp->buflen<<2)) {
|
printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx (large)\n",
|
printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx (large)\n",
|
(unsigned long) svsk->sk_reclen);
|
(unsigned long) svsk->sk_reclen);
|
goto err_delete;
|
goto err_delete;
|
}
|
}
|
}
|
}
|
|
|
/* Check whether enough data is available */
|
/* Check whether enough data is available */
|
len = svc_recv_available(svsk);
|
len = svc_recv_available(svsk);
|
if (len < 0)
|
if (len < 0)
|
goto error;
|
goto error;
|
|
|
if (len < svsk->sk_reclen) {
|
if (len < svsk->sk_reclen) {
|
dprintk("svc: incomplete TCP record (%d of %d)\n",
|
dprintk("svc: incomplete TCP record (%d of %d)\n",
|
len, svsk->sk_reclen);
|
len, svsk->sk_reclen);
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
return -EAGAIN; /* record not complete */
|
return -EAGAIN; /* record not complete */
|
}
|
}
|
set_bit(SK_DATA, &svsk->sk_flags);
|
set_bit(SK_DATA, &svsk->sk_flags);
|
|
|
/* Frob argbuf */
|
/* Frob argbuf */
|
bufp->iov[0].iov_base += 4;
|
bufp->iov[0].iov_base += 4;
|
bufp->iov[0].iov_len -= 4;
|
bufp->iov[0].iov_len -= 4;
|
|
|
/* Now receive data */
|
/* Now receive data */
|
len = svc_recvfrom(rqstp, bufp->iov, bufp->nriov, svsk->sk_reclen);
|
len = svc_recvfrom(rqstp, bufp->iov, bufp->nriov, svsk->sk_reclen);
|
if (len < 0)
|
if (len < 0)
|
goto error;
|
goto error;
|
|
|
dprintk("svc: TCP complete record (%d bytes)\n", len);
|
dprintk("svc: TCP complete record (%d bytes)\n", len);
|
|
|
/* Position reply write pointer immediately after
|
/* Position reply write pointer immediately after
|
* record length */
|
* record length */
|
rqstp->rq_resbuf.buf += 1;
|
rqstp->rq_resbuf.buf += 1;
|
rqstp->rq_resbuf.len = 1;
|
rqstp->rq_resbuf.len = 1;
|
|
|
rqstp->rq_skbuff = 0;
|
rqstp->rq_skbuff = 0;
|
rqstp->rq_argbuf.buf += 1;
|
rqstp->rq_argbuf.buf += 1;
|
rqstp->rq_argbuf.len = (len >> 2);
|
rqstp->rq_argbuf.len = (len >> 2);
|
rqstp->rq_prot = IPPROTO_TCP;
|
rqstp->rq_prot = IPPROTO_TCP;
|
|
|
/* Reset TCP read info */
|
/* Reset TCP read info */
|
svsk->sk_reclen = 0;
|
svsk->sk_reclen = 0;
|
svsk->sk_tcplen = 0;
|
svsk->sk_tcplen = 0;
|
|
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
if (serv->sv_stats)
|
if (serv->sv_stats)
|
serv->sv_stats->nettcpcnt++;
|
serv->sv_stats->nettcpcnt++;
|
|
|
return len;
|
return len;
|
|
|
err_delete:
|
err_delete:
|
svc_delete_socket(svsk);
|
svc_delete_socket(svsk);
|
return -EAGAIN;
|
return -EAGAIN;
|
|
|
error:
|
error:
|
if (len == -EAGAIN) {
|
if (len == -EAGAIN) {
|
dprintk("RPC: TCP recvfrom got EAGAIN\n");
|
dprintk("RPC: TCP recvfrom got EAGAIN\n");
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
} else {
|
} else {
|
printk(KERN_NOTICE "%s: recvfrom returned errno %d\n",
|
printk(KERN_NOTICE "%s: recvfrom returned errno %d\n",
|
svsk->sk_server->sv_name, -len);
|
svsk->sk_server->sv_name, -len);
|
svc_sock_received(svsk);
|
svc_sock_received(svsk);
|
}
|
}
|
|
|
return len;
|
return len;
|
}
|
}
|
|
|
/*
|
/*
|
* Send out data on TCP socket.
|
* Send out data on TCP socket.
|
*/
|
*/
|
static int
|
static int
|
svc_tcp_sendto(struct svc_rqst *rqstp)
|
svc_tcp_sendto(struct svc_rqst *rqstp)
|
{
|
{
|
struct svc_buf *bufp = &rqstp->rq_resbuf;
|
struct svc_buf *bufp = &rqstp->rq_resbuf;
|
int sent;
|
int sent;
|
|
|
/* Set up the first element of the reply iovec.
|
/* Set up the first element of the reply iovec.
|
* Any other iovecs that may be in use have been taken
|
* Any other iovecs that may be in use have been taken
|
* care of by the server implementation itself.
|
* care of by the server implementation itself.
|
*/
|
*/
|
bufp->iov[0].iov_base = bufp->base;
|
bufp->iov[0].iov_base = bufp->base;
|
bufp->iov[0].iov_len = bufp->len << 2;
|
bufp->iov[0].iov_len = bufp->len << 2;
|
bufp->base[0] = htonl(0x80000000|((bufp->len << 2) - 4));
|
bufp->base[0] = htonl(0x80000000|((bufp->len << 2) - 4));
|
|
|
if (test_bit(SK_DEAD, &rqstp->rq_sock->sk_flags))
|
if (test_bit(SK_DEAD, &rqstp->rq_sock->sk_flags))
|
return -ENOTCONN;
|
return -ENOTCONN;
|
|
|
sent = svc_sendto(rqstp, bufp->iov, bufp->nriov);
|
sent = svc_sendto(rqstp, bufp->iov, bufp->nriov);
|
if (sent != bufp->len<<2) {
|
if (sent != bufp->len<<2) {
|
printk(KERN_NOTICE "rpc-srv/tcp: %s: sent only %d bytes of %d - shutting down socket\n",
|
printk(KERN_NOTICE "rpc-srv/tcp: %s: sent only %d bytes of %d - shutting down socket\n",
|
rqstp->rq_sock->sk_server->sv_name,
|
rqstp->rq_sock->sk_server->sv_name,
|
sent, bufp->len << 2);
|
sent, bufp->len << 2);
|
svc_delete_socket(rqstp->rq_sock);
|
svc_delete_socket(rqstp->rq_sock);
|
sent = -EAGAIN;
|
sent = -EAGAIN;
|
}
|
}
|
return sent;
|
return sent;
|
}
|
}
|
|
|
static int
|
static int
|
svc_tcp_init(struct svc_sock *svsk)
|
svc_tcp_init(struct svc_sock *svsk)
|
{
|
{
|
struct sock *sk = svsk->sk_sk;
|
struct sock *sk = svsk->sk_sk;
|
struct tcp_opt *tp = &(sk->tp_pinfo.af_tcp);
|
struct tcp_opt *tp = &(sk->tp_pinfo.af_tcp);
|
|
|
svsk->sk_recvfrom = svc_tcp_recvfrom;
|
svsk->sk_recvfrom = svc_tcp_recvfrom;
|
svsk->sk_sendto = svc_tcp_sendto;
|
svsk->sk_sendto = svc_tcp_sendto;
|
|
|
if (sk->state == TCP_LISTEN) {
|
if (sk->state == TCP_LISTEN) {
|
dprintk("setting up TCP socket for listening\n");
|
dprintk("setting up TCP socket for listening\n");
|
sk->data_ready = svc_tcp_listen_data_ready;
|
sk->data_ready = svc_tcp_listen_data_ready;
|
} else {
|
} else {
|
dprintk("setting up TCP socket for reading\n");
|
dprintk("setting up TCP socket for reading\n");
|
sk->state_change = svc_tcp_state_change;
|
sk->state_change = svc_tcp_state_change;
|
sk->data_ready = svc_tcp_data_ready;
|
sk->data_ready = svc_tcp_data_ready;
|
sk->write_space = svc_write_space;
|
sk->write_space = svc_write_space;
|
|
|
svsk->sk_reclen = 0;
|
svsk->sk_reclen = 0;
|
svsk->sk_tcplen = 0;
|
svsk->sk_tcplen = 0;
|
|
|
tp->nonagle = 1; /* disable Nagle's algorithm */
|
tp->nonagle = 1; /* disable Nagle's algorithm */
|
|
|
/* initialise setting must have enough space to
|
/* initialise setting must have enough space to
|
* receive and respond to one request.
|
* receive and respond to one request.
|
* svc_tcp_recvfrom will re-adjust if necessary
|
* svc_tcp_recvfrom will re-adjust if necessary
|
*/
|
*/
|
svc_sock_setbufsize(svsk->sk_sock,
|
svc_sock_setbufsize(svsk->sk_sock,
|
3 * svsk->sk_server->sv_bufsz,
|
3 * svsk->sk_server->sv_bufsz,
|
3 * svsk->sk_server->sv_bufsz);
|
3 * svsk->sk_server->sv_bufsz);
|
|
|
set_bit(SK_CHNGBUF, &svsk->sk_flags);
|
set_bit(SK_CHNGBUF, &svsk->sk_flags);
|
if (sk->state != TCP_ESTABLISHED)
|
if (sk->state != TCP_ESTABLISHED)
|
set_bit(SK_CLOSE, &svsk->sk_flags);
|
set_bit(SK_CLOSE, &svsk->sk_flags);
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
void
|
void
|
svc_sock_update_bufs(struct svc_serv *serv)
|
svc_sock_update_bufs(struct svc_serv *serv)
|
{
|
{
|
/*
|
/*
|
* The number of server threads has changed.
|
* The number of server threads has changed.
|
* flag all socket to the snd/rcv buffer sizes
|
* flag all socket to the snd/rcv buffer sizes
|
* updated.
|
* updated.
|
* We don't just do it, as the locking is rather
|
* We don't just do it, as the locking is rather
|
* awkward at this point
|
* awkward at this point
|
*/
|
*/
|
struct list_head *le;
|
struct list_head *le;
|
|
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
list_for_each(le, &serv->sv_permsocks) {
|
list_for_each(le, &serv->sv_permsocks) {
|
struct svc_sock *svsk =
|
struct svc_sock *svsk =
|
list_entry(le, struct svc_sock, sk_list);
|
list_entry(le, struct svc_sock, sk_list);
|
set_bit(SK_CHNGBUF, &svsk->sk_flags);
|
set_bit(SK_CHNGBUF, &svsk->sk_flags);
|
}
|
}
|
list_for_each(le, &serv->sv_tempsocks) {
|
list_for_each(le, &serv->sv_tempsocks) {
|
struct svc_sock *svsk =
|
struct svc_sock *svsk =
|
list_entry(le, struct svc_sock, sk_list);
|
list_entry(le, struct svc_sock, sk_list);
|
set_bit(SK_CHNGBUF, &svsk->sk_flags);
|
set_bit(SK_CHNGBUF, &svsk->sk_flags);
|
}
|
}
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
}
|
}
|
|
|
/*
|
/*
|
* Receive the next request on any socket.
|
* Receive the next request on any socket.
|
*/
|
*/
|
int
|
int
|
svc_recv(struct svc_serv *serv, struct svc_rqst *rqstp, long timeout)
|
svc_recv(struct svc_serv *serv, struct svc_rqst *rqstp, long timeout)
|
{
|
{
|
struct svc_sock *svsk =NULL;
|
struct svc_sock *svsk =NULL;
|
int len;
|
int len;
|
DECLARE_WAITQUEUE(wait, current);
|
DECLARE_WAITQUEUE(wait, current);
|
|
|
dprintk("svc: server %p waiting for data (to = %ld)\n",
|
dprintk("svc: server %p waiting for data (to = %ld)\n",
|
rqstp, timeout);
|
rqstp, timeout);
|
|
|
if (rqstp->rq_sock)
|
if (rqstp->rq_sock)
|
printk(KERN_ERR
|
printk(KERN_ERR
|
"svc_recv: service %p, socket not NULL!\n",
|
"svc_recv: service %p, socket not NULL!\n",
|
rqstp);
|
rqstp);
|
if (waitqueue_active(&rqstp->rq_wait))
|
if (waitqueue_active(&rqstp->rq_wait))
|
printk(KERN_ERR
|
printk(KERN_ERR
|
"svc_recv: service %p, wait queue active!\n",
|
"svc_recv: service %p, wait queue active!\n",
|
rqstp);
|
rqstp);
|
|
|
/* Initialize the buffers */
|
/* Initialize the buffers */
|
rqstp->rq_argbuf = rqstp->rq_defbuf;
|
rqstp->rq_argbuf = rqstp->rq_defbuf;
|
rqstp->rq_resbuf = rqstp->rq_defbuf;
|
rqstp->rq_resbuf = rqstp->rq_defbuf;
|
|
|
if (signalled())
|
if (signalled())
|
return -EINTR;
|
return -EINTR;
|
|
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
if (!list_empty(&serv->sv_tempsocks)) {
|
if (!list_empty(&serv->sv_tempsocks)) {
|
svsk = list_entry(serv->sv_tempsocks.next,
|
svsk = list_entry(serv->sv_tempsocks.next,
|
struct svc_sock, sk_list);
|
struct svc_sock, sk_list);
|
/* apparently the "standard" is that clients close
|
/* apparently the "standard" is that clients close
|
* idle connections after 5 minutes, servers after
|
* idle connections after 5 minutes, servers after
|
* 6 minutes
|
* 6 minutes
|
* http://www.connectathon.org/talks96/nfstcp.pdf
|
* http://www.connectathon.org/talks96/nfstcp.pdf
|
*/
|
*/
|
if (CURRENT_TIME - svsk->sk_lastrecv < 6*60
|
if (CURRENT_TIME - svsk->sk_lastrecv < 6*60
|
|| test_bit(SK_BUSY, &svsk->sk_flags))
|
|| test_bit(SK_BUSY, &svsk->sk_flags))
|
svsk = NULL;
|
svsk = NULL;
|
}
|
}
|
if (svsk) {
|
if (svsk) {
|
set_bit(SK_BUSY, &svsk->sk_flags);
|
set_bit(SK_BUSY, &svsk->sk_flags);
|
set_bit(SK_CLOSE, &svsk->sk_flags);
|
set_bit(SK_CLOSE, &svsk->sk_flags);
|
rqstp->rq_sock = svsk;
|
rqstp->rq_sock = svsk;
|
svsk->sk_inuse++;
|
svsk->sk_inuse++;
|
} else if ((svsk = svc_sock_dequeue(serv)) != NULL) {
|
} else if ((svsk = svc_sock_dequeue(serv)) != NULL) {
|
rqstp->rq_sock = svsk;
|
rqstp->rq_sock = svsk;
|
svsk->sk_inuse++;
|
svsk->sk_inuse++;
|
rqstp->rq_reserved = serv->sv_bufsz;
|
rqstp->rq_reserved = serv->sv_bufsz;
|
svsk->sk_reserved += rqstp->rq_reserved;
|
svsk->sk_reserved += rqstp->rq_reserved;
|
} else {
|
} else {
|
/* No data pending. Go to sleep */
|
/* No data pending. Go to sleep */
|
svc_serv_enqueue(serv, rqstp);
|
svc_serv_enqueue(serv, rqstp);
|
|
|
/*
|
/*
|
* We have to be able to interrupt this wait
|
* We have to be able to interrupt this wait
|
* to bring down the daemons ...
|
* to bring down the daemons ...
|
*/
|
*/
|
set_current_state(TASK_INTERRUPTIBLE);
|
set_current_state(TASK_INTERRUPTIBLE);
|
add_wait_queue(&rqstp->rq_wait, &wait);
|
add_wait_queue(&rqstp->rq_wait, &wait);
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
|
|
schedule_timeout(timeout);
|
schedule_timeout(timeout);
|
|
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
remove_wait_queue(&rqstp->rq_wait, &wait);
|
remove_wait_queue(&rqstp->rq_wait, &wait);
|
|
|
if (!(svsk = rqstp->rq_sock)) {
|
if (!(svsk = rqstp->rq_sock)) {
|
svc_serv_dequeue(serv, rqstp);
|
svc_serv_dequeue(serv, rqstp);
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
dprintk("svc: server %p, no data yet\n", rqstp);
|
dprintk("svc: server %p, no data yet\n", rqstp);
|
return signalled()? -EINTR : -EAGAIN;
|
return signalled()? -EINTR : -EAGAIN;
|
}
|
}
|
}
|
}
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
|
|
dprintk("svc: server %p, socket %p, inuse=%d\n",
|
dprintk("svc: server %p, socket %p, inuse=%d\n",
|
rqstp, svsk, svsk->sk_inuse);
|
rqstp, svsk, svsk->sk_inuse);
|
len = svsk->sk_recvfrom(rqstp);
|
len = svsk->sk_recvfrom(rqstp);
|
dprintk("svc: got len=%d\n", len);
|
dprintk("svc: got len=%d\n", len);
|
|
|
/* No data, incomplete (TCP) read, or accept() */
|
/* No data, incomplete (TCP) read, or accept() */
|
if (len == 0 || len == -EAGAIN) {
|
if (len == 0 || len == -EAGAIN) {
|
svc_sock_release(rqstp);
|
svc_sock_release(rqstp);
|
return -EAGAIN;
|
return -EAGAIN;
|
}
|
}
|
svsk->sk_lastrecv = CURRENT_TIME;
|
svsk->sk_lastrecv = CURRENT_TIME;
|
if (test_bit(SK_TEMP, &svsk->sk_flags)) {
|
if (test_bit(SK_TEMP, &svsk->sk_flags)) {
|
/* push active sockets to end of list */
|
/* push active sockets to end of list */
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
list_del(&svsk->sk_list);
|
list_del(&svsk->sk_list);
|
list_add_tail(&svsk->sk_list, &serv->sv_tempsocks);
|
list_add_tail(&svsk->sk_list, &serv->sv_tempsocks);
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
}
|
}
|
|
|
rqstp->rq_secure = ntohs(rqstp->rq_addr.sin_port) < 1024;
|
rqstp->rq_secure = ntohs(rqstp->rq_addr.sin_port) < 1024;
|
rqstp->rq_userset = 0;
|
rqstp->rq_userset = 0;
|
rqstp->rq_verfed = 0;
|
rqstp->rq_verfed = 0;
|
|
|
svc_getlong(&rqstp->rq_argbuf, rqstp->rq_xid);
|
svc_getlong(&rqstp->rq_argbuf, rqstp->rq_xid);
|
svc_putlong(&rqstp->rq_resbuf, rqstp->rq_xid);
|
svc_putlong(&rqstp->rq_resbuf, rqstp->rq_xid);
|
|
|
/* Assume that the reply consists of a single buffer. */
|
/* Assume that the reply consists of a single buffer. */
|
rqstp->rq_resbuf.nriov = 1;
|
rqstp->rq_resbuf.nriov = 1;
|
|
|
if (serv->sv_stats)
|
if (serv->sv_stats)
|
serv->sv_stats->netcnt++;
|
serv->sv_stats->netcnt++;
|
return len;
|
return len;
|
}
|
}
|
|
|
/*
|
/*
|
* Drop request
|
* Drop request
|
*/
|
*/
|
void
|
void
|
svc_drop(struct svc_rqst *rqstp)
|
svc_drop(struct svc_rqst *rqstp)
|
{
|
{
|
dprintk("svc: socket %p dropped request\n", rqstp->rq_sock);
|
dprintk("svc: socket %p dropped request\n", rqstp->rq_sock);
|
svc_sock_release(rqstp);
|
svc_sock_release(rqstp);
|
}
|
}
|
|
|
/*
|
/*
|
* Return reply to client.
|
* Return reply to client.
|
*/
|
*/
|
int
|
int
|
svc_send(struct svc_rqst *rqstp)
|
svc_send(struct svc_rqst *rqstp)
|
{
|
{
|
struct svc_sock *svsk;
|
struct svc_sock *svsk;
|
int len;
|
int len;
|
|
|
if ((svsk = rqstp->rq_sock) == NULL) {
|
if ((svsk = rqstp->rq_sock) == NULL) {
|
printk(KERN_WARNING "NULL socket pointer in %s:%d\n",
|
printk(KERN_WARNING "NULL socket pointer in %s:%d\n",
|
__FILE__, __LINE__);
|
__FILE__, __LINE__);
|
return -EFAULT;
|
return -EFAULT;
|
}
|
}
|
|
|
/* release the receive skb before sending the reply */
|
/* release the receive skb before sending the reply */
|
svc_release_skb(rqstp);
|
svc_release_skb(rqstp);
|
|
|
len = svsk->sk_sendto(rqstp);
|
len = svsk->sk_sendto(rqstp);
|
svc_sock_release(rqstp);
|
svc_sock_release(rqstp);
|
|
|
if (len == -ECONNREFUSED || len == -ENOTCONN || len == -EAGAIN)
|
if (len == -ECONNREFUSED || len == -ENOTCONN || len == -EAGAIN)
|
return 0;
|
return 0;
|
return len;
|
return len;
|
}
|
}
|
|
|
/*
|
/*
|
* Initialize socket for RPC use and create svc_sock struct
|
* Initialize socket for RPC use and create svc_sock struct
|
* XXX: May want to setsockopt SO_SNDBUF and SO_RCVBUF.
|
* XXX: May want to setsockopt SO_SNDBUF and SO_RCVBUF.
|
*/
|
*/
|
static struct svc_sock *
|
static struct svc_sock *
|
svc_setup_socket(struct svc_serv *serv, struct socket *sock,
|
svc_setup_socket(struct svc_serv *serv, struct socket *sock,
|
int *errp, int pmap_register)
|
int *errp, int pmap_register)
|
{
|
{
|
struct svc_sock *svsk;
|
struct svc_sock *svsk;
|
struct sock *inet;
|
struct sock *inet;
|
|
|
dprintk("svc: svc_setup_socket %p\n", sock);
|
dprintk("svc: svc_setup_socket %p\n", sock);
|
if (!(svsk = kmalloc(sizeof(*svsk), GFP_KERNEL))) {
|
if (!(svsk = kmalloc(sizeof(*svsk), GFP_KERNEL))) {
|
*errp = -ENOMEM;
|
*errp = -ENOMEM;
|
return NULL;
|
return NULL;
|
}
|
}
|
memset(svsk, 0, sizeof(*svsk));
|
memset(svsk, 0, sizeof(*svsk));
|
|
|
inet = sock->sk;
|
inet = sock->sk;
|
inet->user_data = svsk;
|
inet->user_data = svsk;
|
svsk->sk_sock = sock;
|
svsk->sk_sock = sock;
|
svsk->sk_sk = inet;
|
svsk->sk_sk = inet;
|
svsk->sk_ostate = inet->state_change;
|
svsk->sk_ostate = inet->state_change;
|
svsk->sk_odata = inet->data_ready;
|
svsk->sk_odata = inet->data_ready;
|
svsk->sk_owspace = inet->write_space;
|
svsk->sk_owspace = inet->write_space;
|
svsk->sk_server = serv;
|
svsk->sk_server = serv;
|
svsk->sk_lastrecv = CURRENT_TIME;
|
svsk->sk_lastrecv = CURRENT_TIME;
|
|
|
/* Initialize the socket */
|
/* Initialize the socket */
|
if (sock->type == SOCK_DGRAM)
|
if (sock->type == SOCK_DGRAM)
|
*errp = svc_udp_init(svsk);
|
*errp = svc_udp_init(svsk);
|
else
|
else
|
*errp = svc_tcp_init(svsk);
|
*errp = svc_tcp_init(svsk);
|
if (svsk->sk_sk == NULL)
|
if (svsk->sk_sk == NULL)
|
printk(KERN_WARNING "svsk->sk_sk == NULL after svc_prot_init!\n");
|
printk(KERN_WARNING "svsk->sk_sk == NULL after svc_prot_init!\n");
|
|
|
/* Register socket with portmapper */
|
/* Register socket with portmapper */
|
if (*errp >= 0 && pmap_register)
|
if (*errp >= 0 && pmap_register)
|
*errp = svc_register(serv, inet->protocol, ntohs(inet->sport));
|
*errp = svc_register(serv, inet->protocol, ntohs(inet->sport));
|
|
|
if (*errp < 0) {
|
if (*errp < 0) {
|
inet->user_data = NULL;
|
inet->user_data = NULL;
|
kfree(svsk);
|
kfree(svsk);
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
|
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
if (!pmap_register) {
|
if (!pmap_register) {
|
set_bit(SK_TEMP, &svsk->sk_flags);
|
set_bit(SK_TEMP, &svsk->sk_flags);
|
list_add(&svsk->sk_list, &serv->sv_tempsocks);
|
list_add(&svsk->sk_list, &serv->sv_tempsocks);
|
serv->sv_tmpcnt++;
|
serv->sv_tmpcnt++;
|
} else {
|
} else {
|
clear_bit(SK_TEMP, &svsk->sk_flags);
|
clear_bit(SK_TEMP, &svsk->sk_flags);
|
list_add(&svsk->sk_list, &serv->sv_permsocks);
|
list_add(&svsk->sk_list, &serv->sv_permsocks);
|
}
|
}
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
|
|
dprintk("svc: svc_setup_socket created %p (inet %p)\n",
|
dprintk("svc: svc_setup_socket created %p (inet %p)\n",
|
svsk, svsk->sk_sk);
|
svsk, svsk->sk_sk);
|
return svsk;
|
return svsk;
|
}
|
}
|
|
|
/*
|
/*
|
* Create socket for RPC service.
|
* Create socket for RPC service.
|
*/
|
*/
|
static int
|
static int
|
svc_create_socket(struct svc_serv *serv, int protocol, struct sockaddr_in *sin)
|
svc_create_socket(struct svc_serv *serv, int protocol, struct sockaddr_in *sin)
|
{
|
{
|
struct svc_sock *svsk;
|
struct svc_sock *svsk;
|
struct socket *sock;
|
struct socket *sock;
|
int error;
|
int error;
|
int type;
|
int type;
|
|
|
dprintk("svc: svc_create_socket(%s, %d, %u.%u.%u.%u:%d)\n",
|
dprintk("svc: svc_create_socket(%s, %d, %u.%u.%u.%u:%d)\n",
|
serv->sv_program->pg_name, protocol,
|
serv->sv_program->pg_name, protocol,
|
NIPQUAD(sin->sin_addr.s_addr),
|
NIPQUAD(sin->sin_addr.s_addr),
|
ntohs(sin->sin_port));
|
ntohs(sin->sin_port));
|
|
|
if (protocol != IPPROTO_UDP && protocol != IPPROTO_TCP) {
|
if (protocol != IPPROTO_UDP && protocol != IPPROTO_TCP) {
|
printk(KERN_WARNING "svc: only UDP and TCP "
|
printk(KERN_WARNING "svc: only UDP and TCP "
|
"sockets supported\n");
|
"sockets supported\n");
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM;
|
type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM;
|
|
|
if ((error = sock_create(PF_INET, type, protocol, &sock)) < 0)
|
if ((error = sock_create(PF_INET, type, protocol, &sock)) < 0)
|
return error;
|
return error;
|
|
|
if (sin != NULL) {
|
if (sin != NULL) {
|
if (type == SOCK_STREAM)
|
if (type == SOCK_STREAM)
|
sock->sk->reuse = 1; /* allow address reuse */
|
sock->sk->reuse = 1; /* allow address reuse */
|
error = sock->ops->bind(sock, (struct sockaddr *) sin,
|
error = sock->ops->bind(sock, (struct sockaddr *) sin,
|
sizeof(*sin));
|
sizeof(*sin));
|
if (error < 0)
|
if (error < 0)
|
goto bummer;
|
goto bummer;
|
}
|
}
|
|
|
if (protocol == IPPROTO_TCP) {
|
if (protocol == IPPROTO_TCP) {
|
if ((error = sock->ops->listen(sock, 64)) < 0)
|
if ((error = sock->ops->listen(sock, 64)) < 0)
|
goto bummer;
|
goto bummer;
|
}
|
}
|
|
|
if ((svsk = svc_setup_socket(serv, sock, &error, 1)) != NULL)
|
if ((svsk = svc_setup_socket(serv, sock, &error, 1)) != NULL)
|
return 0;
|
return 0;
|
|
|
bummer:
|
bummer:
|
dprintk("svc: svc_create_socket error = %d\n", -error);
|
dprintk("svc: svc_create_socket error = %d\n", -error);
|
sock_release(sock);
|
sock_release(sock);
|
return error;
|
return error;
|
}
|
}
|
|
|
/*
|
/*
|
* Remove a dead socket
|
* Remove a dead socket
|
*/
|
*/
|
void
|
void
|
svc_delete_socket(struct svc_sock *svsk)
|
svc_delete_socket(struct svc_sock *svsk)
|
{
|
{
|
struct svc_serv *serv;
|
struct svc_serv *serv;
|
struct sock *sk;
|
struct sock *sk;
|
|
|
dprintk("svc: svc_delete_socket(%p)\n", svsk);
|
dprintk("svc: svc_delete_socket(%p)\n", svsk);
|
|
|
if (test_and_set_bit(SK_DEAD, &svsk->sk_flags))
|
if (test_and_set_bit(SK_DEAD, &svsk->sk_flags))
|
return ;
|
return ;
|
|
|
serv = svsk->sk_server;
|
serv = svsk->sk_server;
|
sk = svsk->sk_sk;
|
sk = svsk->sk_sk;
|
|
|
sk->state_change = svsk->sk_ostate;
|
sk->state_change = svsk->sk_ostate;
|
sk->data_ready = svsk->sk_odata;
|
sk->data_ready = svsk->sk_odata;
|
sk->write_space = svsk->sk_owspace;
|
sk->write_space = svsk->sk_owspace;
|
|
|
spin_lock_bh(&serv->sv_lock);
|
spin_lock_bh(&serv->sv_lock);
|
|
|
list_del(&svsk->sk_list);
|
list_del(&svsk->sk_list);
|
if (test_bit(SK_TEMP, &svsk->sk_flags))
|
if (test_bit(SK_TEMP, &svsk->sk_flags))
|
serv->sv_tmpcnt--;
|
serv->sv_tmpcnt--;
|
if (test_bit(SK_QUED, &svsk->sk_flags))
|
if (test_bit(SK_QUED, &svsk->sk_flags))
|
list_del(&svsk->sk_ready);
|
list_del(&svsk->sk_ready);
|
|
|
|
|
if (!svsk->sk_inuse) {
|
if (!svsk->sk_inuse) {
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
sock_release(svsk->sk_sock);
|
sock_release(svsk->sk_sock);
|
kfree(svsk);
|
kfree(svsk);
|
} else {
|
} else {
|
spin_unlock_bh(&serv->sv_lock);
|
spin_unlock_bh(&serv->sv_lock);
|
dprintk(KERN_NOTICE "svc: server socket destroy delayed\n");
|
dprintk(KERN_NOTICE "svc: server socket destroy delayed\n");
|
/* svsk->sk_server = NULL; */
|
/* svsk->sk_server = NULL; */
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* Make a socket for nfsd and lockd
|
* Make a socket for nfsd and lockd
|
*/
|
*/
|
int
|
int
|
svc_makesock(struct svc_serv *serv, int protocol, unsigned short port)
|
svc_makesock(struct svc_serv *serv, int protocol, unsigned short port)
|
{
|
{
|
struct sockaddr_in sin;
|
struct sockaddr_in sin;
|
|
|
dprintk("svc: creating socket proto = %d\n", protocol);
|
dprintk("svc: creating socket proto = %d\n", protocol);
|
sin.sin_family = AF_INET;
|
sin.sin_family = AF_INET;
|
sin.sin_addr.s_addr = INADDR_ANY;
|
sin.sin_addr.s_addr = INADDR_ANY;
|
sin.sin_port = htons(port);
|
sin.sin_port = htons(port);
|
return svc_create_socket(serv, protocol, &sin);
|
return svc_create_socket(serv, protocol, &sin);
|
}
|
}
|
|
|
|
|
