cregit-Linux how code gets into the kernel

Release 4.11 net/sunrpc/svcsock.c

Directory: net/sunrpc
/*
 * linux/net/sunrpc/svcsock.c
 *
 * These are the RPC server socket internals.
 *
 * The server scheduling algorithm does not always distribute the load
 * evenly when servicing a single client. May need to modify the
 * 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
 * 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
 * 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
 * the first skb in the queue, and if it matches the next TCP sequence
 * number, to extract the record marker. Yuck.
 *
 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/inet.h>
#include <linux/udp.h>
#include <linux/tcp.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/file.h>
#include <linux/freezer.h>
#include <net/sock.h>
#include <net/checksum.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/udp.h>
#include <net/tcp.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <asm/ioctls.h>
#include <trace/events/skb.h>

#include <linux/sunrpc/types.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/xprt.h>

#include "sunrpc.h"


#define RPCDBG_FACILITY	RPCDBG_SVCXPRT


static struct svc_sock *svc_setup_socket(struct svc_serv *, struct socket *,
					 int flags);
static int		svc_udp_recvfrom(struct svc_rqst *);
static int		svc_udp_sendto(struct svc_rqst *);
static void		svc_sock_detach(struct svc_xprt *);
static void		svc_tcp_sock_detach(struct svc_xprt *);
static void		svc_sock_free(struct svc_xprt *);

static struct svc_xprt *svc_create_socket(struct svc_serv *, int,
					  struct net *, struct sockaddr *,
					  int, int);
#if defined(CONFIG_SUNRPC_BACKCHANNEL)
static struct svc_xprt *svc_bc_create_socket(struct svc_serv *, int,
					     struct net *, struct sockaddr *,
					     int, int);
static void svc_bc_sock_free(struct svc_xprt *xprt);
#endif /* CONFIG_SUNRPC_BACKCHANNEL */

#ifdef CONFIG_DEBUG_LOCK_ALLOC

static struct lock_class_key svc_key[2];

static struct lock_class_key svc_slock_key[2];


static void svc_reclassify_socket(struct socket *sock) { struct sock *sk = sock->sk; if (WARN_ON_ONCE(!sock_allow_reclassification(sk))) return; switch (sk->sk_family) { case AF_INET: sock_lock_init_class_and_name(sk, "slock-AF_INET-NFSD", &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_xprt.xpt_lock-AF_INET6-NFSD", &svc_key[1]); break; default: BUG(); } }

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PersonTokensPropCommitsCommitProp
Peter Zijlstra8388.30%120.00%
Hannes Frederic Sowa44.26%120.00%
Weston Andros Adamson33.19%120.00%
Tom Tucker22.13%120.00%
John Heffner22.13%120.00%
Total94100.00%5100.00%

#else
static void svc_reclassify_socket(struct socket *sock) { }

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PersonTokensPropCommitsCommitProp
Peter Zijlstra10100.00%1100.00%
Total10100.00%1100.00%

#endif /* * Release an skbuff after use */
static void svc_release_skb(struct svc_rqst *rqstp) { struct sk_buff *skb = rqstp->rq_xprt_ctxt; if (skb) { struct svc_sock *svsk = container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); rqstp->rq_xprt_ctxt = NULL; dprintk("svc: service %p, releasing skb %p\n", rqstp, skb); skb_free_datagram_locked(svsk->sk_sk, skb); } }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker4262.69%133.33%
Chuck Lever2435.82%133.33%
Eric Dumazet11.49%133.33%
Total67100.00%3100.00%


static void svc_release_udp_skb(struct svc_rqst *rqstp) { struct sk_buff *skb = rqstp->rq_xprt_ctxt; if (skb) { rqstp->rq_xprt_ctxt = NULL; dprintk("svc: service %p, releasing skb %p\n", rqstp, skb); consume_skb(skb); } }

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Paolo Abeni46100.00%1100.00%
Total46100.00%1100.00%

union svc_pktinfo_u { struct in_pktinfo pkti; struct in6_pktinfo pkti6; }; #define SVC_PKTINFO_SPACE \ CMSG_SPACE(sizeof(union svc_pktinfo_u))
static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh) { 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); cmh->cmsg_level = SOL_IP; cmh->cmsg_type = IP_PKTINFO; pki->ipi_ifindex = 0; pki->ipi_spec_dst.s_addr = svc_daddr_in(rqstp)->sin_addr.s_addr; cmh->cmsg_len = CMSG_LEN(sizeof(*pki)); } break; case AF_INET6: { struct in6_pktinfo *pki = CMSG_DATA(cmh); struct sockaddr_in6 *daddr = svc_daddr_in6(rqstp); cmh->cmsg_level = SOL_IPV6; cmh->cmsg_type = IPV6_PKTINFO; pki->ipi6_ifindex = daddr->sin6_scope_id; pki->ipi6_addr = daddr->sin6_addr; cmh->cmsg_len = CMSG_LEN(sizeof(*pki)); } break; } }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker12874.42%120.00%
Linus Torvalds (pre-git)2011.63%120.00%
Mi Jinlong1911.05%120.00%
Neil Brown42.33%120.00%
Alexey Dobriyan10.58%120.00%
Total172100.00%5100.00%

/* * send routine intended to be shared by the fore- and back-channel */
int svc_send_common(struct socket *sock, struct xdr_buf *xdr, struct page *headpage, unsigned long headoffset, struct page *tailpage, unsigned long tailoffset) { int result; int size; struct page **ppage = xdr->pages; size_t base = xdr->page_base; unsigned int pglen = xdr->page_len; unsigned int flags = MSG_MORE | MSG_SENDPAGE_NOTLAST; int slen; int len = 0; slen = xdr->len; /* send head */ if (slen == xdr->head[0].iov_len) flags = 0; len = kernel_sendpage(sock, headpage, headoffset, xdr->head[0].iov_len, flags); if (len != xdr->head[0].iov_len) goto out; slen -= xdr->head[0].iov_len; if (slen == 0) goto out; /* send page data */ size = PAGE_SIZE - base < pglen ? PAGE_SIZE - base : pglen; while (pglen > 0) { if (slen == size) flags = 0; result = kernel_sendpage(sock, *ppage, base, size, flags); if (result > 0) len += result; if (result != size) goto out; slen -= size; pglen -= size; size = PAGE_SIZE < pglen ? PAGE_SIZE : pglen; base = 0; ppage++; } /* send tail */ if (xdr->tail[0].iov_len) { result = kernel_sendpage(sock, tailpage, tailoffset, xdr->tail[0].iov_len, 0); if (result > 0) len += result; } out: return len; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker21670.59%214.29%
Linus Torvalds (pre-git)3511.44%214.29%
Rahul Iyer309.80%17.14%
Neil Brown154.90%535.71%
Greg Banks82.61%321.43%
Trond Myklebust20.65%17.14%
Total306100.00%14100.00%

/* * Generic sendto routine */
static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr) { struct svc_sock *svsk = container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); struct socket *sock = svsk->sk_sock; union { struct cmsghdr hdr; long all[SVC_PKTINFO_SPACE / sizeof(long)]; } buffer; struct cmsghdr *cmh = &buffer.hdr; int len = 0; unsigned long tailoff; unsigned long headoff; RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); if (rqstp->rq_prot == IPPROTO_UDP) { struct msghdr msg = { .msg_name = &rqstp->rq_addr, .msg_namelen = rqstp->rq_addrlen, .msg_control = cmh, .msg_controllen = sizeof(buffer), .msg_flags = MSG_MORE, }; svc_set_cmsg_data(rqstp, cmh); if (sock_sendmsg(sock, &msg) < 0) goto out; } tailoff = ((unsigned long)xdr->tail[0].iov_base) & (PAGE_SIZE-1); headoff = 0; len = svc_send_common(sock, xdr, rqstp->rq_respages[0], headoff, rqstp->rq_respages[0], tailoff); out: dprintk("svc: socket %p sendto([%p %zu... ], %d) = %d (addr %s)\n", svsk, xdr->head[0].iov_base, xdr->head[0].iov_len, xdr->len, len, svc_print_addr(rqstp, buf, sizeof(buf))); return len; }

Contributors

PersonTokensPropCommitsCommitProp
Rahul Iyer25797.72%125.00%
Linus Torvalds (pre-git)41.52%125.00%
Alexey Dobriyan10.38%125.00%
Tom Tucker10.38%125.00%
Total263100.00%4100.00%

/* * Report socket names for nfsdfs */
static int svc_one_sock_name(struct svc_sock *svsk, char *buf, int remaining) { const struct sock *sk = svsk->sk_sk; const char *proto_name = sk->sk_protocol == IPPROTO_UDP ? "udp" : "tcp"; int len; switch (sk->sk_family) { case PF_INET: len = snprintf(buf, remaining, "ipv4 %s %pI4 %d\n", proto_name, &inet_sk(sk)->inet_rcv_saddr, inet_sk(sk)->inet_num); break; #if IS_ENABLED(CONFIG_IPV6) case PF_INET6: len = snprintf(buf, remaining, "ipv6 %s %pI6 %d\n", proto_name, &sk->sk_v6_rcv_saddr, inet_sk(sk)->inet_num); break; #endif default: len = snprintf(buf, remaining, "*unknown-%d*\n", sk->sk_family); } if (len >= remaining) { *buf = '\0'; return -ENAMETOOLONG; } return len; }

Contributors

PersonTokensPropCommitsCommitProp
Chuck Lever7748.43%323.08%
Tom Tucker3522.01%17.69%
Linus Torvalds (pre-git)1710.69%215.38%
Eric Dumazet127.55%323.08%
Rahul Iyer85.03%17.69%
Neil Brown74.40%17.69%
Harvey Harrison21.26%17.69%
Greg Banks10.63%17.69%
Total159100.00%13100.00%

/* * Generic recvfrom routine. */
static int svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr, int buflen) { struct svc_sock *svsk = container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); struct msghdr msg = { .msg_flags = MSG_DONTWAIT, }; int len; rqstp->rq_xprt_hlen = 0; clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); len = kernel_recvmsg(svsk->sk_sock, &msg, iov, nr, buflen, msg.msg_flags); /* If we read a full record, then assume there may be more * data to read (stream based sockets only!) */ if (len == buflen) set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); dprintk("svc: socket %p recvfrom(%p, %zu) = %d\n", svsk, iov[0].iov_base, iov[0].iov_len, len); return len; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker7352.90%330.00%
Trond Myklebust3122.46%110.00%
Neil Brown1813.04%440.00%
Linus Torvalds (pre-git)1510.87%110.00%
Alexey Dobriyan10.72%110.00%
Total138100.00%10100.00%


static int svc_partial_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr, int buflen, unsigned int base) { size_t save_iovlen; void *save_iovbase; unsigned int i; int ret; if (base == 0) return svc_recvfrom(rqstp, iov, nr, buflen); for (i = 0; i < nr; i++) { if (iov[i].iov_len > base) break; base -= iov[i].iov_len; } save_iovlen = iov[i].iov_len; save_iovbase = iov[i].iov_base; iov[i].iov_len -= base; iov[i].iov_base += base; ret = svc_recvfrom(rqstp, &iov[i], nr - i, buflen); iov[i].iov_len = save_iovlen; iov[i].iov_base = save_iovbase; return ret; }

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J. Bruce Fields170100.00%1100.00%
Total170100.00%1100.00%

/* * Set socket snd and rcv buffer lengths */
static void svc_sock_setbufsize(struct socket *sock, unsigned int snd, unsigned int rcv) { #if 0 mm_segment_t oldfs; oldfs = get_fs(); set_fs(KERNEL_DS); sock_setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char*)&snd, sizeof(snd)); sock_setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char*)&rcv, sizeof(rcv)); #else /* sock_setsockopt limits use to sysctl_?mem_max, * which isn't acceptable. Until that is made conditional * on not having CAP_SYS_RESOURCE or similar, we go direct... * DaveM said I could! */ lock_sock(sock->sk); sock->sk->sk_sndbuf = snd * 2; sock->sk->sk_rcvbuf = rcv * 2; sock->sk->sk_write_space(sock->sk); release_sock(sock->sk); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker4257.53%114.29%
Linus Torvalds (pre-git)1419.18%228.57%
Trond Myklebust79.59%114.29%
J. Bruce Fields45.48%114.29%
Greg Banks45.48%114.29%
Neil Brown22.74%114.29%
Total73100.00%7100.00%


static int svc_sock_secure_port(struct svc_rqst *rqstp) { return svc_port_is_privileged(svc_addr(rqstp)); }

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PersonTokensPropCommitsCommitProp
Chuck Lever20100.00%1100.00%
Total20100.00%1100.00%

/* * INET callback when data has been received on the socket. */
static void svc_data_ready(struct sock *sk) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; if (svsk) { dprintk("svc: socket %p(inet %p), busy=%d\n", svsk, sk, test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags)); svsk->sk_odata(sk); if (!test_and_set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags)) svc_xprt_enqueue(&svsk->sk_xprt); } }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker5162.20%233.33%
Chuck Lever1720.73%116.67%
Trond Myklebust1315.85%233.33%
David S. Miller11.22%116.67%
Total82100.00%6100.00%

/* * INET callback when space is newly available on the socket. */
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(XPT_BUSY, &svsk->sk_xprt.xpt_flags)); svsk->sk_owspace(sk); svc_xprt_enqueue(&svsk->sk_xprt); } }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker4362.32%133.33%
Chuck Lever1927.54%133.33%
Trond Myklebust710.14%133.33%
Total69100.00%3100.00%


static int svc_tcp_has_wspace(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) return 1; return !test_bit(SOCK_NOSPACE, &svsk->sk_sock->flags); }

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Trond Myklebust55100.00%4100.00%
Total55100.00%4100.00%


static void svc_tcp_kill_temp_xprt(struct svc_xprt *xprt) { struct svc_sock *svsk; struct socket *sock; struct linger no_linger = { .l_onoff = 1, .l_linger = 0, }; svsk = container_of(xprt, struct svc_sock, sk_xprt); sock = svsk->sk_sock; kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER, (char *)&no_linger, sizeof(no_linger)); }

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PersonTokensPropCommitsCommitProp
Scott Mayhew76100.00%1100.00%
Total76100.00%1100.00%

/* * See net/ipv6/ip_sockglue.c : ip_cmsg_recv_pktinfo */
static int svc_udp_get_dest_address4(struct svc_rqst *rqstp, struct cmsghdr *cmh) { struct in_pktinfo *pki = CMSG_DATA(cmh); struct sockaddr_in *daddr = svc_daddr_in(rqstp); if (cmh->cmsg_type != IP_PKTINFO) return 0; daddr->sin_family = AF_INET; daddr->sin_addr.s_addr = pki->ipi_spec_dst.s_addr; return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker2232.35%125.00%
Mi Jinlong1826.47%125.00%
Chuck Lever1623.53%125.00%
Linus Torvalds (pre-git)1217.65%125.00%
Total68100.00%4100.00%

/* * See net/ipv6/datagram.c : ip6_datagram_recv_ctl */
static int svc_udp_get_dest_address6(struct svc_rqst *rqstp, struct cmsghdr *cmh) { struct in6_pktinfo *pki = CMSG_DATA(cmh); struct sockaddr_in6 *daddr = svc_daddr_in6(rqstp); if (cmh->cmsg_type != IPV6_PKTINFO) return 0; daddr->sin6_family = AF_INET6; daddr->sin6_addr = pki->ipi6_addr; daddr->sin6_scope_id = pki->ipi6_ifindex; return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Chuck Lever2838.89%125.00%
Mi Jinlong2636.11%125.00%
Tom Tucker1723.61%125.00%
Alexey Dobriyan11.39%125.00%
Total72100.00%4100.00%

/* * Copy the UDP datagram's destination address to the rqstp structure. * The 'destination' address in this case is the address to which the * peer sent the datagram, i.e. our local address. For multihomed * hosts, this can change from msg to msg. Note that only the IP * address changes, the port number should remain the same. */
static int svc_udp_get_dest_address(struct svc_rqst *rqstp, struct cmsghdr *cmh) { switch (cmh->cmsg_level) { case SOL_IP: return svc_udp_get_dest_address4(rqstp, cmh); case SOL_IPV6: return svc_udp_get_dest_address6(rqstp, cmh); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Chuck Lever4795.92%150.00%
Tom Tucker24.08%150.00%
Total49100.00%2100.00%

/* * Receive a datagram from a UDP socket. */
static int svc_udp_recvfrom(struct svc_rqst *rqstp) { struct svc_sock *svsk = container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); struct svc_serv *serv = svsk->sk_xprt.xpt_server; struct sk_buff *skb; union { struct cmsghdr hdr; long all[SVC_PKTINFO_SPACE / sizeof(long)]; } buffer; struct cmsghdr *cmh = &buffer.hdr; struct msghdr msg = { .msg_name = svc_addr(rqstp), .msg_control = cmh, .msg_controllen = sizeof(buffer), .msg_flags = MSG_DONTWAIT, }; size_t len; int err; if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags)) /* udp sockets need large rcvbuf as all pending * requests are still in that buffer. sndbuf must * also be large enough that there is enough space * for one reply per thread. We count all threads * rather than threads in a particular pool, which * provides an upper bound on the number of threads * which will access the socket. */ svc_sock_setbufsize(svsk->sk_sock, (serv->sv_nrthreads+3) * serv->sv_max_mesg, (serv->sv_nrthreads+3) * serv->sv_max_mesg); 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); if (err >= 0) skb = skb_recv_udp(svsk->sk_sk, 0, 1, &err); if (skb == NULL) { if (err != -EAGAIN) { /* possibly an icmp error */ dprintk("svc: recvfrom returned error %d\n", -err); set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); } return 0; } len = svc_addr_len(svc_addr(rqstp)); rqstp->rq_addrlen = len; if (skb->tstamp == 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(XPT_DATA, &svsk->sk_xprt.xpt_flags); /* there may be more data... */ len = skb->len; rqstp->rq_arg.len = len; rqstp->rq_prot = IPPROTO_UDP; if (!svc_udp_get_dest_address(rqstp, cmh)) { net_warn_ratelimited("svc: received unknown control message %d/%d; dropping RPC reply datagram\n", cmh->cmsg_level, cmh->cmsg_type); goto out_free; } rqstp->rq_daddrlen = svc_addr_len(svc_daddr(rqstp)); if (skb_is_nonlinear(skb)) { /* we have to copy */ local_bh_disable(); if (csum_partial_copy_to_xdr(&rqstp->rq_arg, skb)) { local_bh_enable(); /* checksum error */ goto out_free; } local_bh_enable(); consume_skb(skb); } else { /* we can use it in-place */ rqstp->rq_arg.head[0].iov_base = skb->data; rqstp->rq_arg.head[0].iov_len = len; if (skb_checksum_complete(skb)) goto out_free; rqstp->rq_xprt_ctxt = skb; } rqstp->rq_arg.page_base = 0; if (len <= rqstp->rq_arg.head[0].iov_len) { rqstp->rq_arg.head[0].iov_len = len; rqstp->rq_arg.page_len = 0; rqstp->rq_respages = rqstp->rq_pages+1; } else { rqstp->rq_arg.page_len = len - rqstp->rq_arg.head[0].iov_len; rqstp->rq_respages = rqstp->rq_pages + 1 + DIV_ROUND_UP(rqstp->rq_arg.page_len, PAGE_SIZE); } rqstp->rq_next_page = rqstp->rq_respages+1; if (serv->sv_stats) serv->sv_stats->netudpcnt++; return len; out_free: kfree_skb(skb); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker38864.56%313.04%
Neil Brown11819.63%626.09%
J. Bruce Fields223.66%313.04%
Chuck Lever193.16%313.04%
Linus Torvalds (pre-git)162.66%28.70%
David S. Miller142.33%14.35%
Mi Jinlong122.00%14.35%
Eric Dumazet71.16%14.35%
Paolo Abeni30.50%28.70%
Joe Perches20.33%14.35%
Total601100.00%23100.00%


static int svc_udp_sendto(struct svc_rqst *rqstp) { int error; error = svc_sendto(rqstp, &rqstp->rq_res); if (error == -ECONNREFUSED) /* ICMP error on earlier request. */ error = svc_sendto(rqstp, &rqstp->rq_res); return error; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker3061.22%150.00%
Linus Torvalds (pre-git)1938.78%150.00%
Total49100.00%2100.00%


static void svc_udp_prep_reply_hdr(struct svc_rqst *rqstp) { }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)660.00%150.00%
Tom Tucker440.00%150.00%
Total10100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker6868.69%240.00%
Linus Torvalds (pre-git)2121.21%120.00%
Chuck Lever1010.10%240.00%
Total99100.00%5100.00%


static struct svc_xprt *svc_udp_accept(struct svc_xprt *xprt) { BUG(); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker1578.95%150.00%
Neil Brown421.05%150.00%
Total19100.00%2100.00%


static void svc_udp_kill_temp_xprt(struct svc_xprt *xprt) { }

Contributors

PersonTokensPropCommitsCommitProp
Scott Mayhew10100.00%1100.00%
Total10100.00%1100.00%


static struct svc_xprt *svc_udp_create(struct svc_serv *serv, struct net *net, struct sockaddr *sa, int salen, int flags) { return svc_create_socket(serv, IPPROTO_UDP, net, sa, salen, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker2964.44%133.33%
Neil Brown920.00%133.33%
Pavel Emelyanov715.56%133.33%
Total45100.00%3100.00%

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_udp_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, .xpo_secure_port = svc_sock_secure_port, .xpo_kill_temp_xprt = svc_udp_kill_temp_xprt, }; 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, .xcl_ident = XPRT_TRANSPORT_UDP, };
static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv) { int err, level, optname, one = 1; svc_xprt_init(sock_net(svsk->sk_sock->sk), &svc_udp_class, &svsk->sk_xprt, serv); clear_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags); svsk->sk_sk->sk_data_ready = svc_data_ready; svsk->sk_sk->sk_write_space = svc_write_space; /* 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_xprt.xpt_server->sv_max_mesg, 3 * svsk->sk_xprt.xpt_server->sv_max_mesg); /* 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); /* make sure we get destination address info */ switch (svsk->sk_sk->sk_family) { case AF_INET: level = SOL_IP; optname = IP_PKTINFO; break; case AF_INET6: level = SOL_IPV6; optname = IPV6_RECVPKTINFO; break; default: BUG(); } err = kernel_setsockopt(svsk->sk_sock, level, optname, (char *)&one, sizeof(one)); dprintk("svc: kernel_setsockopt returned %d\n", err); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker9949.25%333.33%
Chuck Lever5024.88%111.11%
Neil Brown3215.92%111.11%
Linus Torvalds (pre-git)104.98%222.22%
Stanislav Kinsbursky94.48%111.11%
Trond Myklebust10.50%111.11%
Total201100.00%9100.00%

/* * 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) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; dprintk("svc: socket %p TCP (listen) state change %d\n", sk, sk->sk_state); if (svsk) svsk->sk_odata(sk); /* * This callback may called twice when a new connection * is established as a child socket inherits everything * from a parent LISTEN socket. * 1) data_ready method of the parent socket will be called * when one of child sockets become ESTABLISHED. * 2) data_ready method of the child socket may be called * when it receives data before the socket is accepted. * In case of 2, we should ignore it silently. */ if (sk->sk_state == TCP_LISTEN) { if (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); } }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker4043.48%333.33%
Neil Brown2729.35%222.22%
Linus Torvalds (pre-git)1314.13%222.22%
Trond Myklebust1111.96%111.11%
Arnaldo Carvalho de Melo11.09%111.11%
Total92100.00%9100.00%

/* * A state change on a connected socket means it's dying or dead. */
static void svc_tcp_state_change(struct sock *sk) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; dprintk("svc: socket %p TCP (connected) state change %d (svsk %p)\n", sk, sk->sk_state, sk->sk_user_data); if (!svsk) printk("svc: socket %p: no user data\n", sk); else { svsk->sk_ostate(sk); if (sk->sk_state != TCP_ESTABLISHED) { set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); svc_xprt_enqueue(&svsk->sk_xprt); } } }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker6772.83%228.57%
Trond Myklebust1213.04%228.57%
Chuck Lever77.61%228.57%
Linus Torvalds (pre-git)66.52%114.29%
Total92100.00%7100.00%

/* * Accept a TCP connection */
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_xprt.xpt_server; struct socket *sock = svsk->sk_sock; struct socket *newsock; struct svc_sock *newsvsk; int err, slen; RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); dprintk("svc: tcp_accept %p sock %p\n", svsk, sock); if (!sock) return NULL; clear_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); err = kernel_accept(sock, &newsock, O_NONBLOCK); if (err < 0) { if (err == -ENOMEM) printk(KERN_WARNING "%s: no more sockets!\n", serv->sv_name); else if (err != -EAGAIN) net_warn_ratelimited("%s: accept failed (err %d)!\n", serv->sv_name, -err); return NULL; } set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); err = kernel_getpeername(newsock, sin, &slen); if (err < 0) { net_warn_ratelimited("%s: peername failed (err %d)!\n", serv->sv_name, -err); goto failed; /* aborted connection or whatever */ } /* Ideally, we would want to reject connections from unauthorized * hosts here, but when we get encryption, the IP of the host won't * tell us anything. For now just warn about unpriv connections. */ if (!svc_port_is_privileged(sin)) { dprintk("%s: connect from unprivileged port: %s\n", serv->sv_name, __svc_print_addr(sin, buf, sizeof(buf))); } dprintk("%s: connect from %s\n", serv->sv_name, __svc_print_addr(sin, buf, sizeof(buf))); /* Reset the inherited callbacks before calling svc_setup_socket */ newsock->sk->sk_state_change = svsk->sk_ostate; newsock->sk->sk_data_ready = svsk->sk_odata; newsock->sk->sk_write_space = svsk->sk_owspace; /* make sure that a write doesn't block forever when * low on memory */ newsock->sk->sk_sndtimeo = HZ*30; newsvsk = svc_setup_socket(serv, newsock, (SVC_SOCK_ANONYMOUS | SVC_SOCK_TEMPORARY)); if (IS_ERR(newsvsk)) goto failed; 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); } svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen); if (sock_is_loopback(newsock->sk)) set_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags); else clear_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags); if (serv->sv_stats) serv->sv_stats->nettcpconn++; return &newsvsk->sk_xprt; failed: sock_release(newsock); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker23349.57%623.08%
Neil Brown9019.15%830.77%
J. Bruce Fields6313.40%27.69%
Linus Torvalds (pre-git)337.02%13.85%
Trond Myklebust316.60%13.85%
Andi Kleen61.28%13.85%
Pavel Emelyanov51.06%13.85%
Joe Perches20.43%13.85%
David S. Miller20.43%13.85%
Eric Dumazet20.43%13.85%
Chuck Lever10.21%13.85%
Adrian Bunk10.21%13.85%
Linus Torvalds10.21%13.85%
Total470100.00%26100.00%


static unsigned int svc_tcp_restore_pages(struct svc_sock *svsk, struct svc_rqst *rqstp) { unsigned int i, len, npages; if (svsk->sk_datalen == 0) return 0; len = svsk->sk_datalen; npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; for (i = 0; i < npages; i++) { if (rqstp->rq_pages[i] != NULL) put_page(rqstp->rq_pages[i]); BUG_ON(svsk->sk_pages[i] == NULL); rqstp->rq_pages[i] = svsk->sk_pages[i]; svsk->sk_pages[i] = NULL; } rqstp->rq_arg.head[0].iov_base = page_address(rqstp->rq_pages[0]); return len; }

Contributors

PersonTokensPropCommitsCommitProp
J. Bruce Fields149100.00%2100.00%
Total149100.00%2100.00%


static void svc_tcp_save_pages(struct svc_sock *svsk, struct svc_rqst *rqstp) { unsigned int i, len, npages; if (svsk->sk_datalen == 0) return; len = svsk->sk_datalen; npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; for (i = 0; i < npages; i++) { svsk->sk_pages[i] = rqstp->rq_pages[i]; rqstp->rq_pages[i] = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
J. Bruce Fields89100.00%2100.00%
Total89100.00%2100.00%


static void svc_tcp_clear_pages(struct svc_sock *svsk) { unsigned int i, len, npages; if (svsk->sk_datalen == 0) goto out; len = svsk->sk_datalen; npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; for (i = 0; i < npages; i++) { if (svsk->sk_pages[i] == NULL) { WARN_ON_ONCE(1); continue; } put_page(svsk->sk_pages[i]); svsk->sk_pages[i] = NULL; } out: svsk->sk_tcplen = 0; svsk->sk_datalen = 0; }

Contributors

PersonTokensPropCommitsCommitProp
J. Bruce Fields10288.70%330.00%
Neil Brown76.09%440.00%
Tom Tucker43.48%110.00%
Chuck Lever10.87%110.00%
Linus Torvalds (pre-git)10.87%110.00%
Total115100.00%10100.00%

/* * Receive fragment record header. * If we haven't gotten the record length yet, get the next four bytes. */
static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp) { struct svc_serv *serv = svsk->sk_xprt.xpt_server; unsigned int want; int len; if (svsk->sk_tcplen < sizeof(rpc_fraghdr)) { struct kvec iov; want = sizeof(rpc_fraghdr) - svsk->sk_tcplen; iov.iov_base = ((char *) &svsk->sk_reclen) + svsk->sk_tcplen; iov.iov_len = want; if ((len = svc_recvfrom(rqstp, &iov, 1, want)) < 0) goto error; svsk->sk_tcplen += len; if (len < want) { dprintk("svc: short recvfrom while reading record " "length (%d of %d)\n", len, want); return -EAGAIN; } dprintk("svc: TCP record, %d bytes\n", svc_sock_reclen(svsk)); if (svc_sock_reclen(svsk) + svsk->sk_datalen > serv->sv_max_mesg) { net_notice_ratelimited("RPC: fragment too large: %d\n", svc_sock_reclen(svsk)); goto err_delete; } } return svc_sock_reclen(svsk); error: dprintk("RPC: TCP recv_record got %d\n", len); return len; err_delete: set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); return -EAGAIN; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker10448.60%213.33%
Rahul Iyer3516.36%16.67%
Neil Brown2411.21%320.00%
J. Bruce Fields2310.75%426.67%
Chuck Lever104.67%16.67%
Trond Myklebust104.67%16.67%
Alexandros Batsakis62.80%16.67%
Joe Perches10.47%16.67%
Linus Torvalds (pre-git)10.47%16.67%
Total214100.00%15100.00%


static int receive_cb_reply(struct svc_sock *svsk, struct svc_rqst *rqstp) { struct rpc_xprt *bc_xprt = svsk->sk_xprt.xpt_bc_xprt; struct rpc_rqst *req = NULL; struct kvec *src, *dst; __be32 *p = (__be32 *)rqstp->rq_arg.head[0].iov_base; __be32 xid; __be32 calldir; xid = *p++; calldir = *p; if (!bc_xprt) return -EAGAIN; spin_lock_bh(&bc_xprt->transport_lock); req = xprt_lookup_rqst(bc_xprt, xid); if (!req) goto unlock_notfound; memcpy(&req->rq_private_buf, &req->rq_rcv_buf, sizeof(struct xdr_buf)); /* * XXX!: cheating for now! Only copying HEAD. * But we know this is good enough for now (in fact, for any * callback reply in the forseeable future). */ dst = &req->rq_private_buf.head[0]; src = &rqstp->rq_arg.head[0]; if (dst->iov_len < src->iov_len) goto unlock_eagain; /* whatever; just giving up. */ memcpy(dst->iov_base, src->iov_base, src->iov_len); xprt_complete_rqst(req->rq_task, rqstp->rq_arg.len); rqstp->rq_arg.len = 0; spin_unlock_bh(&bc_xprt->transport_lock); return 0; unlock_notfound: printk(KERN_NOTICE "%s: Got unrecognized reply: " "calldir 0x%x xpt_bc_xprt %p xid %08x\n", __func__, ntohl(calldir), bc_xprt, ntohl(xid)); unlock_eagain: spin_unlock_bh(&bc_xprt->transport_lock); return -EAGAIN; }

Contributors

PersonTokensPropCommitsCommitProp
Trond Myklebust13854.33%222.22%
Rahul Iyer9135.83%111.11%
Tom Tucker114.33%222.22%
Alexandros Batsakis72.76%111.11%
J. Bruce Fields72.76%333.33%
Total254100.00%9100.00%


static int copy_pages_to_kvecs(struct kvec *vec, struct page **pages, int len) { int i = 0; int t = 0; while (t < len) { vec[i].iov_base = page_address(pages[i]); vec[i].iov_len = PAGE_SIZE; i++; t += PAGE_SIZE; } return i; }

Contributors

PersonTokensPropCommitsCommitProp
Trond Myklebust5576.39%133.33%
Rahul Iyer1318.06%133.33%
Alexandros Batsakis45.56%133.33%
Total72100.00%3100.00%


static void svc_tcp_fragment_received(struct svc_sock *svsk) { /* If we have more data, signal svc_xprt_enqueue() to try again */ dprintk("svc: TCP %s record (%d bytes)\n", svc_sock_final_rec(svsk) ? "final" : "nonfinal", svc_sock_reclen(svsk)); svsk->sk_tcplen = 0; svsk->sk_reclen = 0; }

Contributors

PersonTokensPropCommitsCommitProp
J. Bruce Fields43100.00%1100.00%
Total43100.00%1100.00%

/* * Receive data from a TCP socket. */
static int svc_tcp_recvfrom(struct svc_rqst *rqstp) { struct svc_sock *svsk = container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); struct svc_serv *serv = svsk->sk_xprt.xpt_server; int len; struct kvec *vec; unsigned int want, base; __be32 *p; __be32 calldir; int pnum; dprintk("svc: tcp_recv %p data %d conn %d close %d\n", svsk, test_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags), test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags), test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags)); len = svc_tcp_recv_record(svsk, rqstp); if (len < 0) goto error; base = svc_tcp_restore_pages(svsk, rqstp); want = svc_sock_reclen(svsk) - (svsk->sk_tcplen - sizeof(rpc_fraghdr)); vec = rqstp->rq_vec; pnum = copy_pages_to_kvecs(&vec[0], &rqstp->rq_pages[0], svsk->sk_datalen + want); rqstp->rq_respages = &rqstp->rq_pages[pnum]; rqstp->rq_next_page = rqstp->rq_respages + 1; /* Now receive data */ len = svc_partial_recvfrom(rqstp, vec, pnum, want, base); if (len >= 0) { svsk->sk_tcplen += len; svsk->sk_datalen += len; } if (len != want || !svc_sock_final_rec(svsk)) { svc_tcp_save_pages(svsk, rqstp); if (len < 0 && len != -EAGAIN) goto err_delete; if (len == want) svc_tcp_fragment_received(svsk); else dprintk("svc: incomplete TCP record (%d of %d)\n", (int)(svsk->sk_tcplen - sizeof(rpc_fraghdr)), svc_sock_reclen(svsk)); goto err_noclose; } if (svsk->sk_datalen < 8) { svsk->sk_datalen = 0; goto err_delete; /* client is nuts. */ } rqstp->rq_arg.len = svsk->sk_datalen; rqstp->rq_arg.page_base = 0; if (rqstp->rq_arg.len <= rqstp->rq_arg.head[0].iov_len) { rqstp->rq_arg.head[0].iov_len = rqstp->rq_arg.len; rqstp->rq_arg.page_len = 0; } else rqstp->rq_arg.page_len = rqstp->rq_arg.len - rqstp->rq_arg.head[0].iov_len; rqstp->rq_xprt_ctxt = NULL; rqstp->rq_prot = IPPROTO_TCP; if (test_bit(XPT_LOCAL, &svsk->sk_xprt.xpt_flags)) set_bit(RQ_LOCAL, &rqstp->rq_flags); else clear_bit(RQ_LOCAL, &rqstp->rq_flags); p = (__be32 *)rqstp->rq_arg.head[0].iov_base; calldir = p[1]; if (calldir) len = receive_cb_reply(svsk, rqstp); /* Reset TCP read info */ svsk->sk_datalen = 0; svc_tcp_fragment_received(svsk); if (len < 0) goto error; svc_xprt_copy_addrs(rqstp, &svsk->sk_xprt); if (serv->sv_stats) serv->sv_stats->nettcpcnt++; return rqstp->rq_arg.len; error: if (len != -EAGAIN) goto err_delete; dprintk("RPC: TCP recvfrom got EAGAIN\n"); return 0; err_delete: printk(KERN_NOTICE "%s: recvfrom returned errno %d\n", svsk->sk_xprt.xpt_server->sv_name, -len); set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); err_noclose: return 0; /* record not complete */ }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker18129.48%620.00%
J. Bruce Fields17428.34%1343.33%
Alexandros Batsakis12019.54%13.33%
Trond Myklebust8013.03%310.00%
Neil Brown294.72%413.33%
Jeff Layton233.75%13.33%
Linus Torvalds (pre-git)40.65%13.33%
Rahul Iyer30.49%13.33%
Total614100.00%30100.00%

/* * Send out data on TCP socket. */
static int svc_tcp_sendto(struct svc_rqst *rqstp) { struct xdr_buf *xbufp = &rqstp->rq_res; int sent; __be32 reclen; /* Set up the first element of the reply kvec. * Any other kvecs that may be in use have been taken * care of by the server implementation itself. */ reclen = htonl(0x80000000|((xbufp->len ) - 4)); memcpy(xbufp->head[0].iov_base, &reclen, 4); 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_xprt->xpt_server->sv_name, (sent<0)?"got error":"sent only", sent, xbufp->len); set_bit(XPT_CLOSE, &rqstp->rq_xprt->xpt_flags); svc_xprt_enqueue(rqstp->rq_xprt); sent = -EAGAIN; } return sent; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker11077.46%240.00%
Linus Torvalds (pre-git)2517.61%240.00%
Neil Brown74.93%120.00%
Total142100.00%5100.00%

/* * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker1852.94%133.33%
Linus Torvalds (pre-git)1441.18%133.33%
Neil Brown25.88%133.33%
Total34100.00%3100.00%


static struct svc_xprt *svc_tcp_create(struct svc_serv *serv, struct net *net, struct sockaddr *sa, int salen, int flags) { return svc_create_socket(serv, IPPROTO_TCP, net, sa, salen, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker2657.78%133.33%
Linus Torvalds (pre-git)1226.67%133.33%
Pavel Emelyanov715.56%133.33%
Total45100.00%3100.00%

#if defined(CONFIG_SUNRPC_BACKCHANNEL) static struct svc_xprt *svc_bc_create_socket(struct svc_serv *, int, struct net *, struct sockaddr *, int, int); static void svc_bc_sock_free(struct svc_xprt *xprt);
static struct svc_xprt *svc_bc_tcp_create(struct svc_serv *serv, struct net *net, struct sockaddr *sa, int salen, int flags) { return svc_bc_create_socket(serv, IPPROTO_TCP, net, sa, salen, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Adamson45100.00%1100.00%
Total45100.00%1100.00%


static void svc_bc_tcp_sock_detach(struct svc_xprt *xprt) { }

Contributors

PersonTokensPropCommitsCommitProp
Andy Adamson10100.00%1100.00%
Total10100.00%1100.00%

static struct svc_xprt_ops svc_tcp_bc_ops = { .xpo_create = svc_bc_tcp_create, .xpo_detach = svc_bc_tcp_sock_detach, .xpo_free = svc_bc_sock_free, .xpo_prep_reply_hdr = svc_tcp_prep_reply_hdr, .xpo_secure_port = svc_sock_secure_port, }; static struct svc_xprt_class svc_tcp_bc_class = { .xcl_name = "tcp-bc", .xcl_owner = THIS_MODULE, .xcl_ops = &svc_tcp_bc_ops, .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP, };
static void svc_init_bc_xprt_sock(void) { svc_reg_xprt_class(&svc_tcp_bc_class); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Adamson14100.00%1100.00%
Total14100.00%1100.00%


static void svc_cleanup_bc_xprt_sock(void) { svc_unreg_xprt_class(&svc_tcp_bc_class); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Adamson14100.00%1100.00%
Total14100.00%1100.00%

#else /* CONFIG_SUNRPC_BACKCHANNEL */
static void svc_init_bc_xprt_sock(void) { }

Contributors

PersonTokensPropCommitsCommitProp
Andy Adamson7100.00%1100.00%
Total7100.00%1100.00%


static void svc_cleanup_bc_xprt_sock(void) { }

Contributors

PersonTokensPropCommitsCommitProp
Andy Adamson7100.00%1100.00%
Total7100.00%1100.00%

#endif /* CONFIG_SUNRPC_BACKCHANNEL */ 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_tcp_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, .xpo_secure_port = svc_sock_secure_port, .xpo_kill_temp_xprt = svc_tcp_kill_temp_xprt, }; 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, .xcl_ident = XPRT_TRANSPORT_TCP, };
void svc_init_xprt_sock(void) { svc_reg_xprt_class(&svc_tcp_class); svc_reg_xprt_class(&svc_udp_class); svc_init_bc_xprt_sock(); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker1254.55%240.00%
Linus Torvalds (pre-git)731.82%240.00%
Andy Adamson313.64%120.00%
Total22100.00%5100.00%


void svc_cleanup_xprt_sock(void) { svc_unreg_xprt_class(&svc_tcp_class); svc_unreg_xprt_class(&svc_udp_class); svc_cleanup_bc_xprt_sock(); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker940.91%125.00%
Linus Torvalds (pre-git)731.82%125.00%
Andy Adamson313.64%125.00%
Chuck Lever313.64%125.00%
Total22100.00%4100.00%


static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv) { struct sock *sk = svsk->sk_sk; svc_xprt_init(sock_net(svsk->sk_sock->sk), &svc_tcp_class, &svsk->sk_xprt, serv); set_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags); set_bit(XPT_CONG_CTRL, &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(XPT_CONN, &svsk->sk_xprt.xpt_flags); } else { dprintk("setting up TCP socket for reading\n"); sk->sk_state_change = svc_tcp_state_change; sk->sk_data_ready = svc_data_ready; sk->sk_write_space = svc_write_space; svsk->sk_reclen = 0; svsk->sk_tcplen = 0; svsk->sk_datalen = 0; memset(&svsk->sk_pages[0], 0, sizeof(svsk->sk_pages)); tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF; set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); switch (sk->sk_state) { case TCP_SYN_RECV: case TCP_ESTABLISHED: break; default: set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); } } }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker16371.18%220.00%
J. Bruce Fields2611.35%220.00%
Trond Myklebust135.68%330.00%
Jeff Layton125.24%110.00%
Stanislav Kinsbursky93.93%110.00%
Chuck Lever62.62%110.00%
Total229100.00%10100.00%


void svc_sock_update_bufs(struct svc_serv *serv) { /* * The number of server threads has changed. Update * rcvbuf and sndbuf accordingly on all sockets */ struct svc_sock *svsk; spin_lock_bh(&serv->sv_lock); list_for_each_entry(svsk, &serv->sv_permsocks, sk_xprt.xpt_list) set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags); spin_unlock_bh(&serv->sv_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker4790.38%266.67%
Pavel Emelyanov59.62%133.33%
Total52100.00%3100.00%

EXPORT_SYMBOL_GPL(svc_sock_update_bufs); /* * Initialize socket for RPC use and create svc_sock struct */
static struct svc_sock *svc_setup_socket(struct svc_serv *serv, struct socket *sock, int flags) { struct svc_sock *svsk; struct sock *inet; int pmap_register = !(flags & SVC_SOCK_ANONYMOUS); int err = 0; dprintk("svc: svc_setup_socket %p\n", sock); svsk = kzalloc(sizeof(*svsk), GFP_KERNEL); if (!svsk) return ERR_PTR(-ENOMEM); inet = sock->sk; /* Register socket with portmapper */ if (pmap_register) err = svc_register(serv, sock_net(sock->sk), inet->sk_family, inet->sk_protocol, ntohs(inet_sk(inet)->inet_sport)); if (err < 0) { kfree(svsk); return ERR_PTR(err); } 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; /* Initialize the socket */ if (sock->type == SOCK_DGRAM) svc_udp_init(svsk, serv); else svc_tcp_init(svsk, serv); dprintk("svc: svc_setup_socket created %p (inet %p), " "listen %d close %d\n", svsk, svsk->sk_sk, test_bit(XPT_LISTENER, &svsk->sk_xprt.xpt_flags), test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags)); return svsk; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker13253.88%315.79%
Trond Myklebust2911.84%210.53%
Neil Brown2610.61%421.05%
Linus Torvalds (pre-git)218.57%210.53%
J. Bruce Fields208.16%15.26%
Greg Banks62.45%210.53%
Chuck Lever41.63%210.53%
Stanislav Kinsbursky41.63%15.26%
Linus Torvalds20.82%15.26%
Eric Dumazet10.41%15.26%
Total245100.00%19100.00%


bool svc_alien_sock(struct net *net, int fd) { int err; struct socket *sock = sockfd_lookup(fd, &err); bool ret = false; if (!sock) goto out; if (sock_net(sock->sk) != net) ret = true; sockfd_put(sock); out: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Stanislav Kinsbursky67100.00%1100.00%
Total67100.00%1100.00%

EXPORT_SYMBOL_GPL(svc_alien_sock); /** * svc_addsock - add a listener socket to an RPC service * @serv: pointer to RPC service to which to add a new listener * @fd: file descriptor of the new listener * @name_return: pointer to buffer to fill in with name of listener * @len: size of the buffer * * Fills in socket name and returns positive length of name if successful. * Name is terminated with '\n'. On error, returns a negative errno * value. */
int svc_addsock(struct svc_serv *serv, const int fd, char *name_return, const size_t len) { int err = 0; struct socket *so = sockfd_lookup(fd, &err); struct svc_sock *svsk = NULL; struct sockaddr_storage addr; struct sockaddr *sin = (struct sockaddr *)&addr; int salen; if (!so) return err; err = -EAFNOSUPPORT; if ((so->sk->sk_family != PF_INET) && (so->sk->sk_family != PF_INET6)) goto out; err = -EPROTONOSUPPORT; if (so->sk->sk_protocol != IPPROTO_TCP && so->sk->sk_protocol != IPPROTO_UDP) goto out; err = -EISCONN; if (so->state > SS_UNCONNECTED) goto out; err = -ENOENT; if (!try_module_get(THIS_MODULE)) goto out; svsk = svc_setup_socket(serv, so, SVC_SOCK_DEFAULTS); if (IS_ERR(svsk)) { module_put(THIS_MODULE); err = PTR_ERR(svsk); goto out; } if (kernel_getsockname(svsk->sk_sock, sin, &salen) == 0) svc_xprt_set_local(&svsk->sk_xprt, sin, salen); svc_add_new_perm_xprt(serv, &svsk->sk_xprt); return svc_one_sock_name(svsk, name_return, len); out: sockfd_put(so); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker12749.61%327.27%
J. Bruce Fields7428.91%327.27%
Neil Brown3312.89%218.18%
Aime Le Rouzic135.08%19.09%
Chuck Lever93.52%218.18%
Total256100.00%11100.00%

EXPORT_SYMBOL_GPL(svc_addsock); /* * Create socket for RPC service. */
static struct svc_xprt *svc_create_socket(struct svc_serv *serv, int protocol, struct net *net, struct sockaddr *sin, int len, int flags) { struct svc_sock *svsk; struct socket *sock; int error; int type; struct sockaddr_storage addr; struct sockaddr *newsin = (struct sockaddr *)&addr; int newlen; int family; int val; RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); dprintk("svc: svc_create_socket(%s, %d, %s)\n", serv->sv_program->pg_name, protocol, __svc_print_addr(sin, buf, sizeof(buf))); if (protocol != IPPROTO_UDP && protocol != IPPROTO_TCP) { printk(KERN_WARNING "svc: only UDP and TCP " "sockets supported\n"); return ERR_PTR(-EINVAL); } type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM; switch (sin->sa_family) { case AF_INET6: family = PF_INET6; break; case AF_INET: family = PF_INET; break; default: return ERR_PTR(-EINVAL); } error = __sock_create(net, family, type, protocol, &sock, 1); if (error < 0) return ERR_PTR(error); svc_reclassify_socket(sock); /* * If this is an PF_INET6 listener, we want to avoid * getting requests from IPv4 remotes. Those should * be shunted to a PF_INET listener via rpcbind. */ val = 1; if (family == PF_INET6) kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY, (char *)&val, sizeof(val)); if (type == SOCK_STREAM) sock->sk->sk_reuse = SK_CAN_REUSE; /* allow address reuse */ error = kernel_bind(sock, sin, len); if (error < 0) goto bummer; newlen = len; error = kernel_getsockname(sock, newsin, &newlen); if (error < 0) goto bummer; if (protocol == IPPROTO_TCP) { if ((error = kernel_listen(sock, 64)) < 0) goto bummer; } svsk = svc_setup_socket(serv, sock, flags); if (IS_ERR(svsk)) { error = PTR_ERR(svsk); goto bummer; } 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 ERR_PTR(error); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker23759.55%17.69%
Trond Myklebust7117.84%17.69%
Neil Brown5012.56%323.08%
J. Bruce Fields184.52%215.38%
Pavel Emelyanov164.02%430.77%
Chuck Lever51.26%17.69%
Greg Banks10.25%17.69%
Total398100.00%13100.00%

/* * Detach the svc_sock from the socket so that no * more callbacks occur. */
static void svc_sock_detach(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); struct sock *sk = svsk->sk_sk; dprintk("svc: svc_sock_detach(%p)\n", svsk); /* put back the old socket callbacks */ lock_sock(sk); sk->sk_state_change = svsk->sk_ostate; sk->sk_data_ready = svsk->sk_odata; sk->sk_write_space = svsk->sk_owspace; sk->sk_user_data = NULL; release_sock(sk); }

Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker3946.99%114.29%
Trond Myklebust1720.48%228.57%
Neil Brown1416.87%228.57%
Chuck Lever910.84%114.29%
J. Bruce Fields44.82%114.29%
Total83100.00%7100.00%

/* * Disconnect the socket, and reset the callbacks */
static void svc_tcp_sock_detach(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); dprintk("svc: svc_tcp_sock_detach(%p)\n", svsk); svc_sock_detach(xprt); if (!test_bit(XPT_LISTENER, &xprt->xpt_flags)) { svc_tcp_clear_pages(svsk); kernel_sock_shutdown(svsk->sk_sock, SHUT_RDWR); } }

Contributors

PersonTokensPropCommitsCommitProp
Trond Myklebust5988.06%133.33%
J. Bruce Fields710.45%133.33%
Neil Brown11.49%133.33%
Total67100.00%3100.00%

/* * Free the svc_sock's socket resources and the svc_sock itself. */
static void svc_sock_free(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); dprintk("svc: svc_sock_free(%p)\n", svsk); if (svsk->sk_sock->file) sockfd_put(svsk->sk_sock); else sock_release(svsk->sk_sock); kfree(svsk); }

Contributors

PersonTokensPropCommitsCommitProp
Neil Brown3150.82%133.33%
Tom Tucker3049.18%266.67%
Total61100.00%3100.00%

#if defined(CONFIG_SUNRPC_BACKCHANNEL) /* * Create a back channel svc_xprt which shares the fore channel socket. */
static struct svc_xprt *svc_bc_create_socket(struct svc_serv *serv, int protocol, struct net *net, struct sockaddr *sin, int len, int flags) { struct svc_sock *svsk; struct svc_xprt *xprt; if (protocol != IPPROTO_TCP) { printk(KERN_WARNING "svc: only TCP sockets" " supported on shared back channel\n"); return ERR_PTR(-EINVAL); } svsk = kzalloc(sizeof(*svsk), GFP_KERNEL); if (!svsk) return ERR_PTR(-ENOMEM); xprt = &svsk->sk_xprt; svc_xprt_init(net, &svc_tcp_bc_class, xprt, serv); set_bit(XPT_CONG_CTRL, &svsk->sk_xprt.xpt_flags); serv->sv_bc_xprt = xprt; return xprt; }

Contributors

PersonTokensPropCommitsCommitProp
Benny Halevy6651.16%120.00%
Andy Adamson4937.98%240.00%
Kinglong Mee129.30%120.00%
Stanislav Kinsbursky21.55%120.00%
Total129100.00%5100.00%

/* * Free a back channel svc_sock. */
static void svc_bc_sock_free(struct svc_xprt *xprt) { if (xprt) kfree(container_of(xprt, struct svc_sock, sk_xprt)); }

Contributors

PersonTokensPropCommitsCommitProp
Benny Halevy2692.86%150.00%
Andy Adamson27.14%150.00%
Total28100.00%2100.00%

#endif /* CONFIG_SUNRPC_BACKCHANNEL */

Overall Contributors

PersonTokensPropCommitsCommitProp
Tom Tucker312639.91%1910.80%
J. Bruce Fields99612.72%2111.93%
Trond Myklebust6618.44%2011.36%
Neil Brown5597.14%2815.91%
Rahul Iyer4435.66%10.57%
Linus Torvalds (pre-git)4275.45%84.55%
Chuck Lever4255.43%2111.93%
Andy Adamson3043.88%31.70%
Alexandros Batsakis1381.76%10.57%
Peter Zijlstra1161.48%10.57%
Stanislav Kinsbursky961.23%31.70%
Scott Mayhew961.23%10.57%
Benny Halevy921.17%10.57%
Mi Jinlong750.96%10.57%
Paolo Abeni530.68%21.14%
Pavel Emelyanov440.56%52.84%
Jeff Layton390.50%31.70%
Eric Dumazet260.33%63.41%
Greg Banks200.26%52.84%
David S. Miller170.22%21.14%
Aime Le Rouzic130.17%10.57%
Kinglong Mee120.15%10.57%
Linus Torvalds80.10%42.27%
Andi Kleen60.08%10.57%
Joe Perches50.06%10.57%
Alexey Dobriyan40.05%21.14%
Hannes Frederic Sowa40.05%10.57%
Paul Gortmaker30.04%10.57%
Weston Andros Adamson30.04%10.57%
Andrew Morton30.04%10.57%
Nigel Cunningham30.04%10.57%
Ilpo Järvinen30.04%10.57%
H Hartley Sweeten30.04%10.57%
Arnaldo Carvalho de Melo20.03%21.14%
John Heffner20.03%10.57%
Harvey Harrison20.03%10.57%
Stefan Hajnoczi10.01%10.57%
Adrian Bunk10.01%10.57%
Tom Parkin10.01%10.57%
Total7832100.00%176100.00%
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