Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/net/sunrpc/svcsock.c |
| 3 | * |
| 4 | * These are the RPC server socket internals. |
| 5 | * |
| 6 | * The server scheduling algorithm does not always distribute the load |
| 7 | * evenly when servicing a single client. May need to modify the |
Tom Tucker | f6150c3 | 2007-12-30 21:07:57 -0600 | [diff] [blame] | 8 | * svc_xprt_enqueue procedure... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * |
| 10 | * TCP support is largely untested and may be a little slow. The problem |
| 11 | * is that we currently do two separate recvfrom's, one for the 4-byte |
| 12 | * record length, and the second for the actual record. This could possibly |
| 13 | * be improved by always reading a minimum size of around 100 bytes and |
| 14 | * tucking any superfluous bytes away in a temporary store. Still, that |
| 15 | * leaves write requests out in the rain. An alternative may be to peek at |
| 16 | * the first skb in the queue, and if it matches the next TCP sequence |
| 17 | * number, to extract the record marker. Yuck. |
| 18 | * |
| 19 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> |
| 20 | */ |
| 21 | |
Ilpo Järvinen | 172589c | 2007-08-28 15:50:33 -0700 | [diff] [blame] | 22 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/sched.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/fcntl.h> |
| 26 | #include <linux/net.h> |
| 27 | #include <linux/in.h> |
| 28 | #include <linux/inet.h> |
| 29 | #include <linux/udp.h> |
Andrew Morton | 91483c4 | 2005-08-09 20:20:07 -0700 | [diff] [blame] | 30 | #include <linux/tcp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/unistd.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/netdevice.h> |
| 34 | #include <linux/skbuff.h> |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 35 | #include <linux/file.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame] | 36 | #include <linux/freezer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <net/sock.h> |
| 38 | #include <net/checksum.h> |
| 39 | #include <net/ip.h> |
Chuck Lever | b92503b | 2007-02-12 00:53:36 -0800 | [diff] [blame] | 40 | #include <net/ipv6.h> |
Chuck Lever | b7872fe | 2008-04-14 12:27:01 -0400 | [diff] [blame] | 41 | #include <net/tcp.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 42 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <asm/uaccess.h> |
| 44 | #include <asm/ioctls.h> |
| 45 | |
| 46 | #include <linux/sunrpc/types.h> |
Chuck Lever | ad06e4b | 2007-02-12 00:53:32 -0800 | [diff] [blame] | 47 | #include <linux/sunrpc/clnt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/sunrpc/xdr.h> |
Chuck Lever | c0401ea | 2008-04-14 12:27:30 -0400 | [diff] [blame] | 49 | #include <linux/sunrpc/msg_prot.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <linux/sunrpc/svcsock.h> |
| 51 | #include <linux/sunrpc/stats.h> |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 52 | #include <linux/sunrpc/xprt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Tom Tucker | 360d8738 | 2007-12-30 21:07:17 -0600 | [diff] [blame] | 54 | #define RPCDBG_FACILITY RPCDBG_SVCXPRT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | |
| 57 | static struct svc_sock *svc_setup_socket(struct svc_serv *, struct socket *, |
Chuck Lever | 6b17433 | 2007-02-12 00:53:28 -0800 | [diff] [blame] | 58 | int *errp, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | static void svc_udp_data_ready(struct sock *, int); |
| 60 | static int svc_udp_recvfrom(struct svc_rqst *); |
| 61 | static int svc_udp_sendto(struct svc_rqst *); |
Tom Tucker | 755ccea | 2007-12-30 21:07:27 -0600 | [diff] [blame] | 62 | static void svc_sock_detach(struct svc_xprt *); |
Trond Myklebust | 69b6ba3 | 2008-12-23 16:30:11 -0500 | [diff] [blame] | 63 | static void svc_tcp_sock_detach(struct svc_xprt *); |
Tom Tucker | 755ccea | 2007-12-30 21:07:27 -0600 | [diff] [blame] | 64 | static void svc_sock_free(struct svc_xprt *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 66 | static struct svc_xprt *svc_create_socket(struct svc_serv *, int, |
| 67 | struct sockaddr *, int, int); |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 68 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 69 | static struct lock_class_key svc_key[2]; |
| 70 | static struct lock_class_key svc_slock_key[2]; |
| 71 | |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 72 | static void svc_reclassify_socket(struct socket *sock) |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 73 | { |
| 74 | struct sock *sk = sock->sk; |
John Heffner | 02b3d34 | 2007-09-12 10:42:12 +0200 | [diff] [blame] | 75 | BUG_ON(sock_owned_by_user(sk)); |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 76 | switch (sk->sk_family) { |
| 77 | case AF_INET: |
| 78 | sock_lock_init_class_and_name(sk, "slock-AF_INET-NFSD", |
Tom Tucker | def13d7 | 2007-12-30 21:08:08 -0600 | [diff] [blame] | 79 | &svc_slock_key[0], |
| 80 | "sk_xprt.xpt_lock-AF_INET-NFSD", |
| 81 | &svc_key[0]); |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 82 | break; |
| 83 | |
| 84 | case AF_INET6: |
| 85 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-NFSD", |
Tom Tucker | def13d7 | 2007-12-30 21:08:08 -0600 | [diff] [blame] | 86 | &svc_slock_key[1], |
| 87 | "sk_xprt.xpt_lock-AF_INET6-NFSD", |
| 88 | &svc_key[1]); |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 89 | break; |
| 90 | |
| 91 | default: |
| 92 | BUG(); |
| 93 | } |
| 94 | } |
| 95 | #else |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 96 | static void svc_reclassify_socket(struct socket *sock) |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 97 | { |
| 98 | } |
| 99 | #endif |
| 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | /* |
| 102 | * Release an skbuff after use |
| 103 | */ |
Tom Tucker | 5148bf4 | 2007-12-30 21:07:25 -0600 | [diff] [blame] | 104 | static void svc_release_skb(struct svc_rqst *rqstp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | { |
Tom Tucker | 5148bf4 | 2007-12-30 21:07:25 -0600 | [diff] [blame] | 106 | struct sk_buff *skb = rqstp->rq_xprt_ctxt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | if (skb) { |
Tom Tucker | 57b1d3b | 2007-12-30 21:08:22 -0600 | [diff] [blame] | 109 | struct svc_sock *svsk = |
| 110 | container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); |
Tom Tucker | 5148bf4 | 2007-12-30 21:07:25 -0600 | [diff] [blame] | 111 | rqstp->rq_xprt_ctxt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | dprintk("svc: service %p, releasing skb %p\n", rqstp, skb); |
Eric Dumazet | 9d410c7 | 2009-10-30 05:03:53 +0000 | [diff] [blame] | 114 | skb_free_datagram_locked(svsk->sk_sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | } |
| 117 | |
Chuck Lever | b92503b | 2007-02-12 00:53:36 -0800 | [diff] [blame] | 118 | union svc_pktinfo_u { |
| 119 | struct in_pktinfo pkti; |
Chuck Lever | b92503b | 2007-02-12 00:53:36 -0800 | [diff] [blame] | 120 | struct in6_pktinfo pkti6; |
Chuck Lever | b92503b | 2007-02-12 00:53:36 -0800 | [diff] [blame] | 121 | }; |
David S. Miller | bc375ea | 2007-04-12 13:35:59 -0700 | [diff] [blame] | 122 | #define SVC_PKTINFO_SPACE \ |
| 123 | CMSG_SPACE(sizeof(union svc_pktinfo_u)) |
Chuck Lever | b92503b | 2007-02-12 00:53:36 -0800 | [diff] [blame] | 124 | |
| 125 | static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh) |
| 126 | { |
Tom Tucker | 57b1d3b | 2007-12-30 21:08:22 -0600 | [diff] [blame] | 127 | struct svc_sock *svsk = |
| 128 | container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); |
| 129 | switch (svsk->sk_sk->sk_family) { |
Chuck Lever | b92503b | 2007-02-12 00:53:36 -0800 | [diff] [blame] | 130 | case AF_INET: { |
| 131 | struct in_pktinfo *pki = CMSG_DATA(cmh); |
| 132 | |
| 133 | cmh->cmsg_level = SOL_IP; |
| 134 | cmh->cmsg_type = IP_PKTINFO; |
| 135 | pki->ipi_ifindex = 0; |
| 136 | pki->ipi_spec_dst.s_addr = rqstp->rq_daddr.addr.s_addr; |
| 137 | cmh->cmsg_len = CMSG_LEN(sizeof(*pki)); |
| 138 | } |
| 139 | break; |
NeilBrown | 5a05ed7 | 2007-03-06 01:42:22 -0800 | [diff] [blame] | 140 | |
Chuck Lever | b92503b | 2007-02-12 00:53:36 -0800 | [diff] [blame] | 141 | case AF_INET6: { |
| 142 | struct in6_pktinfo *pki = CMSG_DATA(cmh); |
| 143 | |
| 144 | cmh->cmsg_level = SOL_IPV6; |
| 145 | cmh->cmsg_type = IPV6_PKTINFO; |
| 146 | pki->ipi6_ifindex = 0; |
| 147 | ipv6_addr_copy(&pki->ipi6_addr, |
| 148 | &rqstp->rq_daddr.addr6); |
| 149 | cmh->cmsg_len = CMSG_LEN(sizeof(*pki)); |
| 150 | } |
| 151 | break; |
Chuck Lever | b92503b | 2007-02-12 00:53:36 -0800 | [diff] [blame] | 152 | } |
| 153 | return; |
| 154 | } |
| 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | /* |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 157 | * send routine intended to be shared by the fore- and back-channel |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | */ |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 159 | int svc_send_common(struct socket *sock, struct xdr_buf *xdr, |
| 160 | struct page *headpage, unsigned long headoffset, |
| 161 | struct page *tailpage, unsigned long tailoffset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | int result; |
| 164 | int size; |
| 165 | struct page **ppage = xdr->pages; |
| 166 | size_t base = xdr->page_base; |
| 167 | unsigned int pglen = xdr->page_len; |
| 168 | unsigned int flags = MSG_MORE; |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 169 | int slen; |
| 170 | int len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
| 172 | slen = xdr->len; |
| 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | /* send head */ |
| 175 | if (slen == xdr->head[0].iov_len) |
| 176 | flags = 0; |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 177 | len = kernel_sendpage(sock, headpage, headoffset, |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 178 | xdr->head[0].iov_len, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | if (len != xdr->head[0].iov_len) |
| 180 | goto out; |
| 181 | slen -= xdr->head[0].iov_len; |
| 182 | if (slen == 0) |
| 183 | goto out; |
| 184 | |
| 185 | /* send page data */ |
| 186 | size = PAGE_SIZE - base < pglen ? PAGE_SIZE - base : pglen; |
| 187 | while (pglen > 0) { |
| 188 | if (slen == size) |
| 189 | flags = 0; |
Sridhar Samudrala | e6242e9 | 2006-08-07 20:58:01 -0700 | [diff] [blame] | 190 | result = kernel_sendpage(sock, *ppage, base, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | if (result > 0) |
| 192 | len += result; |
| 193 | if (result != size) |
| 194 | goto out; |
| 195 | slen -= size; |
| 196 | pglen -= size; |
| 197 | size = PAGE_SIZE < pglen ? PAGE_SIZE : pglen; |
| 198 | base = 0; |
| 199 | ppage++; |
| 200 | } |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 201 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | /* send tail */ |
| 203 | if (xdr->tail[0].iov_len) { |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 204 | result = kernel_sendpage(sock, tailpage, tailoffset, |
| 205 | xdr->tail[0].iov_len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | if (result > 0) |
| 207 | len += result; |
| 208 | } |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 209 | |
| 210 | out: |
| 211 | return len; |
| 212 | } |
| 213 | |
| 214 | |
| 215 | /* |
| 216 | * Generic sendto routine |
| 217 | */ |
| 218 | static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr) |
| 219 | { |
| 220 | struct svc_sock *svsk = |
| 221 | container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); |
| 222 | struct socket *sock = svsk->sk_sock; |
| 223 | union { |
| 224 | struct cmsghdr hdr; |
| 225 | long all[SVC_PKTINFO_SPACE / sizeof(long)]; |
| 226 | } buffer; |
| 227 | struct cmsghdr *cmh = &buffer.hdr; |
| 228 | int len = 0; |
| 229 | unsigned long tailoff; |
| 230 | unsigned long headoff; |
| 231 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
| 232 | |
| 233 | if (rqstp->rq_prot == IPPROTO_UDP) { |
| 234 | struct msghdr msg = { |
| 235 | .msg_name = &rqstp->rq_addr, |
| 236 | .msg_namelen = rqstp->rq_addrlen, |
| 237 | .msg_control = cmh, |
| 238 | .msg_controllen = sizeof(buffer), |
| 239 | .msg_flags = MSG_MORE, |
| 240 | }; |
| 241 | |
| 242 | svc_set_cmsg_data(rqstp, cmh); |
| 243 | |
| 244 | if (sock_sendmsg(sock, &msg, 0) < 0) |
| 245 | goto out; |
| 246 | } |
| 247 | |
| 248 | tailoff = ((unsigned long)xdr->tail[0].iov_base) & (PAGE_SIZE-1); |
| 249 | headoff = 0; |
| 250 | len = svc_send_common(sock, xdr, rqstp->rq_respages[0], headoff, |
| 251 | rqstp->rq_respages[0], tailoff); |
| 252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | out: |
Chuck Lever | ad06e4b | 2007-02-12 00:53:32 -0800 | [diff] [blame] | 254 | dprintk("svc: socket %p sendto([%p %Zu... ], %d) = %d (addr %s)\n", |
Tom Tucker | 57b1d3b | 2007-12-30 21:08:22 -0600 | [diff] [blame] | 255 | svsk, xdr->head[0].iov_base, xdr->head[0].iov_len, |
Chuck Lever | ad06e4b | 2007-02-12 00:53:32 -0800 | [diff] [blame] | 256 | xdr->len, len, svc_print_addr(rqstp, buf, sizeof(buf))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | return len; |
| 259 | } |
| 260 | |
| 261 | /* |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 262 | * Report socket names for nfsdfs |
| 263 | */ |
Chuck Lever | e7942b9 | 2009-04-23 19:32:48 -0400 | [diff] [blame] | 264 | static int svc_one_sock_name(struct svc_sock *svsk, char *buf, int remaining) |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 265 | { |
Chuck Lever | 017cb47 | 2009-04-23 19:33:03 -0400 | [diff] [blame] | 266 | const struct sock *sk = svsk->sk_sk; |
| 267 | const char *proto_name = sk->sk_protocol == IPPROTO_UDP ? |
| 268 | "udp" : "tcp"; |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 269 | int len; |
| 270 | |
Chuck Lever | 017cb47 | 2009-04-23 19:33:03 -0400 | [diff] [blame] | 271 | switch (sk->sk_family) { |
Chuck Lever | e7942b9 | 2009-04-23 19:32:48 -0400 | [diff] [blame] | 272 | case PF_INET: |
| 273 | len = snprintf(buf, remaining, "ipv4 %s %pI4 %d\n", |
Chuck Lever | 017cb47 | 2009-04-23 19:33:03 -0400 | [diff] [blame] | 274 | proto_name, |
| 275 | &inet_sk(sk)->rcv_saddr, |
| 276 | inet_sk(sk)->num); |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 277 | break; |
Chuck Lever | 58de2f8 | 2009-04-23 19:32:55 -0400 | [diff] [blame] | 278 | case PF_INET6: |
| 279 | len = snprintf(buf, remaining, "ipv6 %s %pI6 %d\n", |
Chuck Lever | 017cb47 | 2009-04-23 19:33:03 -0400 | [diff] [blame] | 280 | proto_name, |
| 281 | &inet6_sk(sk)->rcv_saddr, |
| 282 | inet_sk(sk)->num); |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 283 | break; |
| 284 | default: |
Chuck Lever | e7942b9 | 2009-04-23 19:32:48 -0400 | [diff] [blame] | 285 | len = snprintf(buf, remaining, "*unknown-%d*\n", |
Chuck Lever | 017cb47 | 2009-04-23 19:33:03 -0400 | [diff] [blame] | 286 | sk->sk_family); |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 287 | } |
Chuck Lever | e7942b9 | 2009-04-23 19:32:48 -0400 | [diff] [blame] | 288 | |
| 289 | if (len >= remaining) { |
| 290 | *buf = '\0'; |
| 291 | return -ENAMETOOLONG; |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 292 | } |
| 293 | return len; |
| 294 | } |
| 295 | |
Chuck Lever | 8435d34 | 2009-04-23 19:32:40 -0400 | [diff] [blame] | 296 | /** |
| 297 | * svc_sock_names - construct a list of listener names in a string |
| 298 | * @serv: pointer to RPC service |
| 299 | * @buf: pointer to a buffer to fill in with socket names |
| 300 | * @buflen: size of the buffer to be filled |
| 301 | * @toclose: pointer to '\0'-terminated C string containing the name |
| 302 | * of a listener to be closed |
| 303 | * |
| 304 | * Fills in @buf with a '\n'-separated list of names of listener |
| 305 | * sockets. If @toclose is not NULL, the socket named by @toclose |
| 306 | * is closed, and is not included in the output list. |
| 307 | * |
| 308 | * Returns positive length of the socket name string, or a negative |
| 309 | * errno value on error. |
| 310 | */ |
| 311 | int svc_sock_names(struct svc_serv *serv, char *buf, const size_t buflen, |
| 312 | const char *toclose) |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 313 | { |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 314 | struct svc_sock *svsk, *closesk = NULL; |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 315 | int len = 0; |
| 316 | |
| 317 | if (!serv) |
| 318 | return 0; |
Chuck Lever | e7942b9 | 2009-04-23 19:32:48 -0400 | [diff] [blame] | 319 | |
NeilBrown | aaf68cf | 2007-02-08 14:20:30 -0800 | [diff] [blame] | 320 | spin_lock_bh(&serv->sv_lock); |
Tom Tucker | 7a18208 | 2007-12-30 21:07:53 -0600 | [diff] [blame] | 321 | list_for_each_entry(svsk, &serv->sv_permsocks, sk_xprt.xpt_list) { |
Chuck Lever | e7942b9 | 2009-04-23 19:32:48 -0400 | [diff] [blame] | 322 | int onelen = svc_one_sock_name(svsk, buf + len, buflen - len); |
| 323 | if (onelen < 0) { |
| 324 | len = onelen; |
| 325 | break; |
| 326 | } |
| 327 | if (toclose && strcmp(toclose, buf + len) == 0) |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 328 | closesk = svsk; |
| 329 | else |
| 330 | len += onelen; |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 331 | } |
NeilBrown | aaf68cf | 2007-02-08 14:20:30 -0800 | [diff] [blame] | 332 | spin_unlock_bh(&serv->sv_lock); |
Chuck Lever | e7942b9 | 2009-04-23 19:32:48 -0400 | [diff] [blame] | 333 | |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 334 | if (closesk) |
NeilBrown | 5680c44 | 2006-10-04 02:15:45 -0700 | [diff] [blame] | 335 | /* Should unregister with portmap, but you cannot |
| 336 | * unregister just one protocol... |
| 337 | */ |
Tom Tucker | 7a18208 | 2007-12-30 21:07:53 -0600 | [diff] [blame] | 338 | svc_close_xprt(&closesk->sk_xprt); |
NeilBrown | 37a0347 | 2006-10-04 02:15:44 -0700 | [diff] [blame] | 339 | else if (toclose) |
| 340 | return -ENOENT; |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 341 | return len; |
| 342 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 343 | EXPORT_SYMBOL_GPL(svc_sock_names); |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 344 | |
| 345 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | * Check input queue length |
| 347 | */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 348 | static int svc_recv_available(struct svc_sock *svsk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | struct socket *sock = svsk->sk_sock; |
| 351 | int avail, err; |
| 352 | |
Sridhar Samudrala | e6242e9 | 2006-08-07 20:58:01 -0700 | [diff] [blame] | 353 | err = kernel_sock_ioctl(sock, TIOCINQ, (unsigned long) &avail); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
| 355 | return (err >= 0)? avail : err; |
| 356 | } |
| 357 | |
| 358 | /* |
| 359 | * Generic recvfrom routine. |
| 360 | */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 361 | static int svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr, |
| 362 | int buflen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | { |
Tom Tucker | 57b1d3b | 2007-12-30 21:08:22 -0600 | [diff] [blame] | 364 | struct svc_sock *svsk = |
| 365 | container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); |
Chuck Lever | 1ba9510 | 2007-02-12 00:53:31 -0800 | [diff] [blame] | 366 | struct msghdr msg = { |
| 367 | .msg_flags = MSG_DONTWAIT, |
| 368 | }; |
| 369 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
Tom Tucker | 260c1d1 | 2007-12-30 21:08:29 -0600 | [diff] [blame] | 371 | rqstp->rq_xprt_hlen = 0; |
| 372 | |
Chuck Lever | 1ba9510 | 2007-02-12 00:53:31 -0800 | [diff] [blame] | 373 | len = kernel_recvmsg(svsk->sk_sock, &msg, iov, nr, buflen, |
| 374 | msg.msg_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | dprintk("svc: socket %p recvfrom(%p, %Zu) = %d\n", |
Chuck Lever | 1ba9510 | 2007-02-12 00:53:31 -0800 | [diff] [blame] | 377 | svsk, iov[0].iov_base, iov[0].iov_len, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | return len; |
| 379 | } |
| 380 | |
| 381 | /* |
| 382 | * Set socket snd and rcv buffer lengths |
| 383 | */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 384 | static void svc_sock_setbufsize(struct socket *sock, unsigned int snd, |
| 385 | unsigned int rcv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | { |
| 387 | #if 0 |
| 388 | mm_segment_t oldfs; |
| 389 | oldfs = get_fs(); set_fs(KERNEL_DS); |
| 390 | sock_setsockopt(sock, SOL_SOCKET, SO_SNDBUF, |
| 391 | (char*)&snd, sizeof(snd)); |
| 392 | sock_setsockopt(sock, SOL_SOCKET, SO_RCVBUF, |
| 393 | (char*)&rcv, sizeof(rcv)); |
| 394 | #else |
| 395 | /* sock_setsockopt limits use to sysctl_?mem_max, |
| 396 | * which isn't acceptable. Until that is made conditional |
| 397 | * on not having CAP_SYS_RESOURCE or similar, we go direct... |
| 398 | * DaveM said I could! |
| 399 | */ |
| 400 | lock_sock(sock->sk); |
| 401 | sock->sk->sk_sndbuf = snd * 2; |
| 402 | sock->sk->sk_rcvbuf = rcv * 2; |
J. Bruce Fields | 7f42183 | 2009-05-27 18:51:06 -0400 | [diff] [blame] | 403 | sock->sk->sk_userlocks |= SOCK_SNDBUF_LOCK|SOCK_RCVBUF_LOCK; |
Trond Myklebust | 47fcb03 | 2009-05-18 17:47:56 -0400 | [diff] [blame] | 404 | sock->sk->sk_write_space(sock->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | release_sock(sock->sk); |
| 406 | #endif |
| 407 | } |
| 408 | /* |
| 409 | * INET callback when data has been received on the socket. |
| 410 | */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 411 | static void svc_udp_data_ready(struct sock *sk, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | { |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 413 | struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 415 | if (svsk) { |
| 416 | dprintk("svc: socket %p(inet %p), count=%d, busy=%d\n", |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 417 | svsk, sk, count, |
| 418 | test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags)); |
| 419 | set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); |
Tom Tucker | f6150c3 | 2007-12-30 21:07:57 -0600 | [diff] [blame] | 420 | svc_xprt_enqueue(&svsk->sk_xprt); |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 421 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) |
| 423 | wake_up_interruptible(sk->sk_sleep); |
| 424 | } |
| 425 | |
| 426 | /* |
| 427 | * INET callback when space is newly available on the socket. |
| 428 | */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 429 | static void svc_write_space(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | { |
| 431 | struct svc_sock *svsk = (struct svc_sock *)(sk->sk_user_data); |
| 432 | |
| 433 | if (svsk) { |
| 434 | dprintk("svc: socket %p(inet %p), write_space busy=%d\n", |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 435 | svsk, sk, test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags)); |
Tom Tucker | f6150c3 | 2007-12-30 21:07:57 -0600 | [diff] [blame] | 436 | svc_xprt_enqueue(&svsk->sk_xprt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) { |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 440 | dprintk("RPC svc_write_space: someone sleeping on %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | svsk); |
| 442 | wake_up_interruptible(sk->sk_sleep); |
| 443 | } |
| 444 | } |
| 445 | |
Trond Myklebust | 47fcb03 | 2009-05-18 17:47:56 -0400 | [diff] [blame] | 446 | static void svc_tcp_write_space(struct sock *sk) |
| 447 | { |
| 448 | struct socket *sock = sk->sk_socket; |
| 449 | |
| 450 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) && sock) |
| 451 | clear_bit(SOCK_NOSPACE, &sock->flags); |
| 452 | svc_write_space(sk); |
| 453 | } |
| 454 | |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 455 | /* |
Chuck Lever | 7702ce4 | 2009-07-13 10:54:26 -0400 | [diff] [blame] | 456 | * See net/ipv6/ip_sockglue.c : ip_cmsg_recv_pktinfo |
| 457 | */ |
| 458 | static int svc_udp_get_dest_address4(struct svc_rqst *rqstp, |
| 459 | struct cmsghdr *cmh) |
| 460 | { |
| 461 | struct in_pktinfo *pki = CMSG_DATA(cmh); |
| 462 | if (cmh->cmsg_type != IP_PKTINFO) |
| 463 | return 0; |
| 464 | rqstp->rq_daddr.addr.s_addr = pki->ipi_spec_dst.s_addr; |
| 465 | return 1; |
| 466 | } |
| 467 | |
| 468 | /* |
| 469 | * See net/ipv6/datagram.c : datagram_recv_ctl |
| 470 | */ |
| 471 | static int svc_udp_get_dest_address6(struct svc_rqst *rqstp, |
| 472 | struct cmsghdr *cmh) |
| 473 | { |
| 474 | struct in6_pktinfo *pki = CMSG_DATA(cmh); |
| 475 | if (cmh->cmsg_type != IPV6_PKTINFO) |
| 476 | return 0; |
| 477 | ipv6_addr_copy(&rqstp->rq_daddr.addr6, &pki->ipi6_addr); |
| 478 | return 1; |
| 479 | } |
| 480 | |
| 481 | /* |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 482 | * Copy the UDP datagram's destination address to the rqstp structure. |
| 483 | * The 'destination' address in this case is the address to which the |
| 484 | * peer sent the datagram, i.e. our local address. For multihomed |
| 485 | * hosts, this can change from msg to msg. Note that only the IP |
| 486 | * address changes, the port number should remain the same. |
| 487 | */ |
Chuck Lever | 7702ce4 | 2009-07-13 10:54:26 -0400 | [diff] [blame] | 488 | static int svc_udp_get_dest_address(struct svc_rqst *rqstp, |
| 489 | struct cmsghdr *cmh) |
Chuck Lever | 9575648 | 2007-02-12 00:53:38 -0800 | [diff] [blame] | 490 | { |
Chuck Lever | 7702ce4 | 2009-07-13 10:54:26 -0400 | [diff] [blame] | 491 | switch (cmh->cmsg_level) { |
| 492 | case SOL_IP: |
| 493 | return svc_udp_get_dest_address4(rqstp, cmh); |
| 494 | case SOL_IPV6: |
| 495 | return svc_udp_get_dest_address6(rqstp, cmh); |
Chuck Lever | 9575648 | 2007-02-12 00:53:38 -0800 | [diff] [blame] | 496 | } |
Chuck Lever | 7702ce4 | 2009-07-13 10:54:26 -0400 | [diff] [blame] | 497 | |
| 498 | return 0; |
Chuck Lever | 9575648 | 2007-02-12 00:53:38 -0800 | [diff] [blame] | 499 | } |
| 500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | /* |
| 502 | * Receive a datagram from a UDP socket. |
| 503 | */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 504 | static int svc_udp_recvfrom(struct svc_rqst *rqstp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | { |
Tom Tucker | 57b1d3b | 2007-12-30 21:08:22 -0600 | [diff] [blame] | 506 | struct svc_sock *svsk = |
| 507 | container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 508 | struct svc_serv *serv = svsk->sk_xprt.xpt_server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | struct sk_buff *skb; |
David S. Miller | bc375ea | 2007-04-12 13:35:59 -0700 | [diff] [blame] | 510 | union { |
| 511 | struct cmsghdr hdr; |
| 512 | long all[SVC_PKTINFO_SPACE / sizeof(long)]; |
| 513 | } buffer; |
| 514 | struct cmsghdr *cmh = &buffer.hdr; |
NeilBrown | 7a37f57 | 2007-03-06 01:42:21 -0800 | [diff] [blame] | 515 | struct msghdr msg = { |
| 516 | .msg_name = svc_addr(rqstp), |
| 517 | .msg_control = cmh, |
| 518 | .msg_controllen = sizeof(buffer), |
| 519 | .msg_flags = MSG_DONTWAIT, |
| 520 | }; |
Chuck Lever | abc5c44 | 2009-04-23 19:31:25 -0400 | [diff] [blame] | 521 | size_t len; |
| 522 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 524 | if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | /* udp sockets need large rcvbuf as all pending |
| 526 | * requests are still in that buffer. sndbuf must |
| 527 | * also be large enough that there is enough space |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 528 | * for one reply per thread. We count all threads |
| 529 | * rather than threads in a particular pool, which |
| 530 | * provides an upper bound on the number of threads |
| 531 | * which will access the socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | */ |
| 533 | svc_sock_setbufsize(svsk->sk_sock, |
NeilBrown | c6b0a9f | 2006-10-06 00:44:05 -0700 | [diff] [blame] | 534 | (serv->sv_nrthreads+3) * serv->sv_max_mesg, |
| 535 | (serv->sv_nrthreads+3) * serv->sv_max_mesg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 537 | clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); |
NeilBrown | 05ed690 | 2007-05-09 02:34:55 -0700 | [diff] [blame] | 538 | skb = NULL; |
| 539 | err = kernel_recvmsg(svsk->sk_sock, &msg, NULL, |
| 540 | 0, 0, MSG_PEEK | MSG_DONTWAIT); |
| 541 | if (err >= 0) |
| 542 | skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err); |
| 543 | |
| 544 | if (skb == NULL) { |
| 545 | if (err != -EAGAIN) { |
| 546 | /* possibly an icmp error */ |
| 547 | dprintk("svc: recvfrom returned error %d\n", -err); |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 548 | set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | } |
Tom Tucker | a6046f7 | 2007-12-30 21:08:01 -0600 | [diff] [blame] | 550 | svc_xprt_received(&svsk->sk_xprt); |
NeilBrown | 05ed690 | 2007-05-09 02:34:55 -0700 | [diff] [blame] | 551 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 553 | len = svc_addr_len(svc_addr(rqstp)); |
Chuck Lever | abc5c44 | 2009-04-23 19:31:25 -0400 | [diff] [blame] | 554 | if (len == 0) |
| 555 | return -EAFNOSUPPORT; |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 556 | rqstp->rq_addrlen = len; |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 557 | if (skb->tstamp.tv64 == 0) { |
| 558 | skb->tstamp = ktime_get_real(); |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 559 | /* Don't enable netstamp, sunrpc doesn't |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | need that much accuracy */ |
| 561 | } |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 562 | svsk->sk_sk->sk_stamp = skb->tstamp; |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 563 | set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); /* there may be more data... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
| 565 | /* |
| 566 | * Maybe more packets - kick another thread ASAP. |
| 567 | */ |
Tom Tucker | a6046f7 | 2007-12-30 21:08:01 -0600 | [diff] [blame] | 568 | svc_xprt_received(&svsk->sk_xprt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
| 570 | len = skb->len - sizeof(struct udphdr); |
| 571 | rqstp->rq_arg.len = len; |
| 572 | |
Chuck Lever | 9575648 | 2007-02-12 00:53:38 -0800 | [diff] [blame] | 573 | rqstp->rq_prot = IPPROTO_UDP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
Chuck Lever | 7702ce4 | 2009-07-13 10:54:26 -0400 | [diff] [blame] | 575 | if (!svc_udp_get_dest_address(rqstp, cmh)) { |
NeilBrown | 7a37f57 | 2007-03-06 01:42:21 -0800 | [diff] [blame] | 576 | if (net_ratelimit()) |
Chuck Lever | 7702ce4 | 2009-07-13 10:54:26 -0400 | [diff] [blame] | 577 | printk(KERN_WARNING |
| 578 | "svc: received unknown control message %d/%d; " |
| 579 | "dropping RPC reply datagram\n", |
| 580 | cmh->cmsg_level, cmh->cmsg_type); |
Eric Dumazet | 9d410c7 | 2009-10-30 05:03:53 +0000 | [diff] [blame] | 581 | skb_free_datagram_locked(svsk->sk_sk, skb); |
NeilBrown | 7a37f57 | 2007-03-06 01:42:21 -0800 | [diff] [blame] | 582 | return 0; |
| 583 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
| 585 | if (skb_is_nonlinear(skb)) { |
| 586 | /* we have to copy */ |
| 587 | local_bh_disable(); |
| 588 | if (csum_partial_copy_to_xdr(&rqstp->rq_arg, skb)) { |
| 589 | local_bh_enable(); |
| 590 | /* checksum error */ |
Eric Dumazet | 9d410c7 | 2009-10-30 05:03:53 +0000 | [diff] [blame] | 591 | skb_free_datagram_locked(svsk->sk_sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | return 0; |
| 593 | } |
| 594 | local_bh_enable(); |
Eric Dumazet | 9d410c7 | 2009-10-30 05:03:53 +0000 | [diff] [blame] | 595 | skb_free_datagram_locked(svsk->sk_sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | } else { |
| 597 | /* we can use it in-place */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 598 | rqstp->rq_arg.head[0].iov_base = skb->data + |
| 599 | sizeof(struct udphdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | rqstp->rq_arg.head[0].iov_len = len; |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 601 | if (skb_checksum_complete(skb)) { |
Eric Dumazet | 9d410c7 | 2009-10-30 05:03:53 +0000 | [diff] [blame] | 602 | skb_free_datagram_locked(svsk->sk_sk, skb); |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 603 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | } |
Tom Tucker | 5148bf4 | 2007-12-30 21:07:25 -0600 | [diff] [blame] | 605 | rqstp->rq_xprt_ctxt = skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | rqstp->rq_arg.page_base = 0; |
| 609 | if (len <= rqstp->rq_arg.head[0].iov_len) { |
| 610 | rqstp->rq_arg.head[0].iov_len = len; |
| 611 | rqstp->rq_arg.page_len = 0; |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 612 | rqstp->rq_respages = rqstp->rq_pages+1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } else { |
| 614 | rqstp->rq_arg.page_len = len - rqstp->rq_arg.head[0].iov_len; |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 615 | rqstp->rq_respages = rqstp->rq_pages + 1 + |
Ilpo Järvinen | 172589c | 2007-08-28 15:50:33 -0700 | [diff] [blame] | 616 | DIV_ROUND_UP(rqstp->rq_arg.page_len, PAGE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | if (serv->sv_stats) |
| 620 | serv->sv_stats->netudpcnt++; |
| 621 | |
| 622 | return len; |
| 623 | } |
| 624 | |
| 625 | static int |
| 626 | svc_udp_sendto(struct svc_rqst *rqstp) |
| 627 | { |
| 628 | int error; |
| 629 | |
| 630 | error = svc_sendto(rqstp, &rqstp->rq_res); |
| 631 | if (error == -ECONNREFUSED) |
| 632 | /* ICMP error on earlier request. */ |
| 633 | error = svc_sendto(rqstp, &rqstp->rq_res); |
| 634 | |
| 635 | return error; |
| 636 | } |
| 637 | |
Tom Tucker | e831fe6 | 2007-12-30 21:07:29 -0600 | [diff] [blame] | 638 | static void svc_udp_prep_reply_hdr(struct svc_rqst *rqstp) |
| 639 | { |
| 640 | } |
| 641 | |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 642 | static int svc_udp_has_wspace(struct svc_xprt *xprt) |
| 643 | { |
| 644 | struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 645 | struct svc_serv *serv = xprt->xpt_server; |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 646 | unsigned long required; |
| 647 | |
| 648 | /* |
| 649 | * Set the SOCK_NOSPACE flag before checking the available |
| 650 | * sock space. |
| 651 | */ |
| 652 | set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags); |
Tom Tucker | 7a90e8c | 2007-12-30 21:07:55 -0600 | [diff] [blame] | 653 | required = atomic_read(&svsk->sk_xprt.xpt_reserved) + serv->sv_max_mesg; |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 654 | if (required*2 > sock_wspace(svsk->sk_sk)) |
| 655 | return 0; |
| 656 | clear_bit(SOCK_NOSPACE, &svsk->sk_sock->flags); |
| 657 | return 1; |
| 658 | } |
| 659 | |
Tom Tucker | 38a417c | 2007-12-30 21:07:36 -0600 | [diff] [blame] | 660 | static struct svc_xprt *svc_udp_accept(struct svc_xprt *xprt) |
| 661 | { |
| 662 | BUG(); |
| 663 | return NULL; |
| 664 | } |
| 665 | |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 666 | static struct svc_xprt *svc_udp_create(struct svc_serv *serv, |
| 667 | struct sockaddr *sa, int salen, |
| 668 | int flags) |
| 669 | { |
| 670 | return svc_create_socket(serv, IPPROTO_UDP, sa, salen, flags); |
| 671 | } |
| 672 | |
Tom Tucker | 360d8738 | 2007-12-30 21:07:17 -0600 | [diff] [blame] | 673 | static struct svc_xprt_ops svc_udp_ops = { |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 674 | .xpo_create = svc_udp_create, |
Tom Tucker | 5d13799 | 2007-12-30 21:07:23 -0600 | [diff] [blame] | 675 | .xpo_recvfrom = svc_udp_recvfrom, |
| 676 | .xpo_sendto = svc_udp_sendto, |
Tom Tucker | 5148bf4 | 2007-12-30 21:07:25 -0600 | [diff] [blame] | 677 | .xpo_release_rqst = svc_release_skb, |
Tom Tucker | 755ccea | 2007-12-30 21:07:27 -0600 | [diff] [blame] | 678 | .xpo_detach = svc_sock_detach, |
| 679 | .xpo_free = svc_sock_free, |
Tom Tucker | e831fe6 | 2007-12-30 21:07:29 -0600 | [diff] [blame] | 680 | .xpo_prep_reply_hdr = svc_udp_prep_reply_hdr, |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 681 | .xpo_has_wspace = svc_udp_has_wspace, |
Tom Tucker | 38a417c | 2007-12-30 21:07:36 -0600 | [diff] [blame] | 682 | .xpo_accept = svc_udp_accept, |
Tom Tucker | 360d8738 | 2007-12-30 21:07:17 -0600 | [diff] [blame] | 683 | }; |
| 684 | |
| 685 | static struct svc_xprt_class svc_udp_class = { |
| 686 | .xcl_name = "udp", |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 687 | .xcl_owner = THIS_MODULE, |
Tom Tucker | 360d8738 | 2007-12-30 21:07:17 -0600 | [diff] [blame] | 688 | .xcl_ops = &svc_udp_ops, |
Tom Tucker | 4902315 | 2007-12-30 21:07:21 -0600 | [diff] [blame] | 689 | .xcl_max_payload = RPCSVC_MAXPAYLOAD_UDP, |
Tom Tucker | 360d8738 | 2007-12-30 21:07:17 -0600 | [diff] [blame] | 690 | }; |
| 691 | |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 692 | static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | { |
Chuck Lever | 7702ce4 | 2009-07-13 10:54:26 -0400 | [diff] [blame] | 694 | int err, level, optname, one = 1; |
NeilBrown | 7a37f57 | 2007-03-06 01:42:21 -0800 | [diff] [blame] | 695 | |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 696 | svc_xprt_init(&svc_udp_class, &svsk->sk_xprt, serv); |
Tom Tucker | def13d7 | 2007-12-30 21:08:08 -0600 | [diff] [blame] | 697 | clear_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | svsk->sk_sk->sk_data_ready = svc_udp_data_ready; |
| 699 | svsk->sk_sk->sk_write_space = svc_write_space; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | |
| 701 | /* initialise setting must have enough space to |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 702 | * receive and respond to one request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | * svc_udp_recvfrom will re-adjust if necessary |
| 704 | */ |
| 705 | svc_sock_setbufsize(svsk->sk_sock, |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 706 | 3 * svsk->sk_xprt.xpt_server->sv_max_mesg, |
| 707 | 3 * svsk->sk_xprt.xpt_server->sv_max_mesg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 709 | /* data might have come in before data_ready set up */ |
| 710 | set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 711 | set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags); |
NeilBrown | 7a37f57 | 2007-03-06 01:42:21 -0800 | [diff] [blame] | 712 | |
NeilBrown | 7a37f57 | 2007-03-06 01:42:21 -0800 | [diff] [blame] | 713 | /* make sure we get destination address info */ |
Chuck Lever | 7702ce4 | 2009-07-13 10:54:26 -0400 | [diff] [blame] | 714 | switch (svsk->sk_sk->sk_family) { |
| 715 | case AF_INET: |
| 716 | level = SOL_IP; |
| 717 | optname = IP_PKTINFO; |
| 718 | break; |
| 719 | case AF_INET6: |
| 720 | level = SOL_IPV6; |
| 721 | optname = IPV6_RECVPKTINFO; |
| 722 | break; |
| 723 | default: |
| 724 | BUG(); |
| 725 | } |
| 726 | err = kernel_setsockopt(svsk->sk_sock, level, optname, |
| 727 | (char *)&one, sizeof(one)); |
| 728 | dprintk("svc: kernel_setsockopt returned %d\n", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | /* |
| 732 | * A data_ready event on a listening socket means there's a connection |
| 733 | * pending. Do not use state_change as a substitute for it. |
| 734 | */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 735 | static void svc_tcp_listen_data_ready(struct sock *sk, int count_unused) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | { |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 737 | struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
| 739 | dprintk("svc: socket %p TCP (listen) state change %d\n", |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 740 | sk, sk->sk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 742 | /* |
| 743 | * This callback may called twice when a new connection |
| 744 | * is established as a child socket inherits everything |
| 745 | * from a parent LISTEN socket. |
| 746 | * 1) data_ready method of the parent socket will be called |
| 747 | * when one of child sockets become ESTABLISHED. |
| 748 | * 2) data_ready method of the child socket may be called |
| 749 | * when it receives data before the socket is accepted. |
| 750 | * In case of 2, we should ignore it silently. |
| 751 | */ |
| 752 | if (sk->sk_state == TCP_LISTEN) { |
| 753 | if (svsk) { |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 754 | set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); |
Tom Tucker | f6150c3 | 2007-12-30 21:07:57 -0600 | [diff] [blame] | 755 | svc_xprt_enqueue(&svsk->sk_xprt); |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 756 | } else |
| 757 | printk("svc: socket %p: no user data\n", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 759 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) |
| 761 | wake_up_interruptible_all(sk->sk_sleep); |
| 762 | } |
| 763 | |
| 764 | /* |
| 765 | * A state change on a connected socket means it's dying or dead. |
| 766 | */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 767 | static void svc_tcp_state_change(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | { |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 769 | struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
| 771 | dprintk("svc: socket %p TCP (connected) state change %d (svsk %p)\n", |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 772 | sk, sk->sk_state, sk->sk_user_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 774 | if (!svsk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | printk("svc: socket %p: no user data\n", sk); |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 776 | else { |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 777 | set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); |
Tom Tucker | f6150c3 | 2007-12-30 21:07:57 -0600 | [diff] [blame] | 778 | svc_xprt_enqueue(&svsk->sk_xprt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) |
| 781 | wake_up_interruptible_all(sk->sk_sleep); |
| 782 | } |
| 783 | |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 784 | static void svc_tcp_data_ready(struct sock *sk, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | { |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 786 | struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
| 788 | dprintk("svc: socket %p TCP data ready (svsk %p)\n", |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 789 | sk, sk->sk_user_data); |
| 790 | if (svsk) { |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 791 | set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); |
Tom Tucker | f6150c3 | 2007-12-30 21:07:57 -0600 | [diff] [blame] | 792 | svc_xprt_enqueue(&svsk->sk_xprt); |
Neil Brown | 939bb7e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 793 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) |
| 795 | wake_up_interruptible(sk->sk_sleep); |
| 796 | } |
| 797 | |
| 798 | /* |
| 799 | * Accept a TCP connection |
| 800 | */ |
Tom Tucker | 38a417c | 2007-12-30 21:07:36 -0600 | [diff] [blame] | 801 | static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | { |
Tom Tucker | 38a417c | 2007-12-30 21:07:36 -0600 | [diff] [blame] | 803 | struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); |
akpm@linux-foundation.org | cdd88b9 | 2007-02-12 00:53:38 -0800 | [diff] [blame] | 804 | struct sockaddr_storage addr; |
| 805 | struct sockaddr *sin = (struct sockaddr *) &addr; |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 806 | struct svc_serv *serv = svsk->sk_xprt.xpt_server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | struct socket *sock = svsk->sk_sock; |
| 808 | struct socket *newsock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | struct svc_sock *newsvsk; |
| 810 | int err, slen; |
Pavel Emelyanov | 5216a8e | 2008-02-21 10:57:45 +0300 | [diff] [blame] | 811 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | |
| 813 | dprintk("svc: tcp_accept %p sock %p\n", svsk, sock); |
| 814 | if (!sock) |
Tom Tucker | 38a417c | 2007-12-30 21:07:36 -0600 | [diff] [blame] | 815 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 817 | clear_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); |
Sridhar Samudrala | e6242e9 | 2006-08-07 20:58:01 -0700 | [diff] [blame] | 818 | err = kernel_accept(sock, &newsock, O_NONBLOCK); |
| 819 | if (err < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | if (err == -ENOMEM) |
| 821 | printk(KERN_WARNING "%s: no more sockets!\n", |
| 822 | serv->sv_name); |
Sridhar Samudrala | e6242e9 | 2006-08-07 20:58:01 -0700 | [diff] [blame] | 823 | else if (err != -EAGAIN && net_ratelimit()) |
| 824 | printk(KERN_WARNING "%s: accept failed (err %d)!\n", |
| 825 | serv->sv_name, -err); |
Tom Tucker | 38a417c | 2007-12-30 21:07:36 -0600 | [diff] [blame] | 826 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 828 | set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
akpm@linux-foundation.org | cdd88b9 | 2007-02-12 00:53:38 -0800 | [diff] [blame] | 830 | err = kernel_getpeername(newsock, sin, &slen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | if (err < 0) { |
| 832 | if (net_ratelimit()) |
| 833 | printk(KERN_WARNING "%s: peername failed (err %d)!\n", |
| 834 | serv->sv_name, -err); |
| 835 | goto failed; /* aborted connection or whatever */ |
| 836 | } |
| 837 | |
| 838 | /* Ideally, we would want to reject connections from unauthorized |
Chuck Lever | ad06e4b | 2007-02-12 00:53:32 -0800 | [diff] [blame] | 839 | * hosts here, but when we get encryption, the IP of the host won't |
| 840 | * tell us anything. For now just warn about unpriv connections. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | */ |
akpm@linux-foundation.org | cdd88b9 | 2007-02-12 00:53:38 -0800 | [diff] [blame] | 842 | if (!svc_port_is_privileged(sin)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | dprintk(KERN_WARNING |
Chuck Lever | ad06e4b | 2007-02-12 00:53:32 -0800 | [diff] [blame] | 844 | "%s: connect from unprivileged port: %s\n", |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 845 | serv->sv_name, |
akpm@linux-foundation.org | cdd88b9 | 2007-02-12 00:53:38 -0800 | [diff] [blame] | 846 | __svc_print_addr(sin, buf, sizeof(buf))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | } |
Chuck Lever | ad06e4b | 2007-02-12 00:53:32 -0800 | [diff] [blame] | 848 | dprintk("%s: connect from %s\n", serv->sv_name, |
akpm@linux-foundation.org | cdd88b9 | 2007-02-12 00:53:38 -0800 | [diff] [blame] | 849 | __svc_print_addr(sin, buf, sizeof(buf))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
| 851 | /* make sure that a write doesn't block forever when |
| 852 | * low on memory |
| 853 | */ |
| 854 | newsock->sk->sk_sndtimeo = HZ*30; |
| 855 | |
Chuck Lever | 6b17433 | 2007-02-12 00:53:28 -0800 | [diff] [blame] | 856 | if (!(newsvsk = svc_setup_socket(serv, newsock, &err, |
| 857 | (SVC_SOCK_ANONYMOUS | SVC_SOCK_TEMPORARY)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | goto failed; |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 859 | svc_xprt_set_remote(&newsvsk->sk_xprt, sin, slen); |
Frank van Maarseveen | a974769 | 2007-07-09 22:21:39 +0200 | [diff] [blame] | 860 | err = kernel_getsockname(newsock, sin, &slen); |
| 861 | if (unlikely(err < 0)) { |
| 862 | dprintk("svc_tcp_accept: kernel_getsockname error %d\n", -err); |
| 863 | slen = offsetof(struct sockaddr, sa_data); |
| 864 | } |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 865 | svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen); |
Chuck Lever | 067d781 | 2007-02-12 00:53:30 -0800 | [diff] [blame] | 866 | |
Tom Tucker | f9f3cc4 | 2007-12-30 21:07:40 -0600 | [diff] [blame] | 867 | if (serv->sv_stats) |
| 868 | serv->sv_stats->nettcpconn++; |
| 869 | |
| 870 | return &newsvsk->sk_xprt; |
| 871 | |
| 872 | failed: |
| 873 | sock_release(newsock); |
| 874 | return NULL; |
| 875 | } |
| 876 | |
| 877 | /* |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 878 | * Receive data. |
| 879 | * If we haven't gotten the record length yet, get the next four bytes. |
| 880 | * Otherwise try to gobble up as much as possible up to the complete |
| 881 | * record length. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | */ |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 883 | static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | { |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 885 | struct svc_serv *serv = svsk->sk_xprt.xpt_server; |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 886 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | |
J. Bruce Fields | 7f42183 | 2009-05-27 18:51:06 -0400 | [diff] [blame] | 888 | if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags)) |
| 889 | /* sndbuf needs to have room for one request |
| 890 | * per thread, otherwise we can stall even when the |
| 891 | * network isn't a bottleneck. |
| 892 | * |
| 893 | * We count all threads rather than threads in a |
| 894 | * particular pool, which provides an upper bound |
| 895 | * on the number of threads which will access the socket. |
| 896 | * |
| 897 | * rcvbuf just needs to be able to hold a few requests. |
| 898 | * Normally they will be removed from the queue |
| 899 | * as soon a a complete request arrives. |
| 900 | */ |
| 901 | svc_sock_setbufsize(svsk->sk_sock, |
| 902 | (serv->sv_nrthreads+3) * serv->sv_max_mesg, |
| 903 | 3 * serv->sv_max_mesg); |
| 904 | |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 905 | clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | |
Chuck Lever | c0401ea | 2008-04-14 12:27:30 -0400 | [diff] [blame] | 907 | if (svsk->sk_tcplen < sizeof(rpc_fraghdr)) { |
| 908 | int want = sizeof(rpc_fraghdr) - svsk->sk_tcplen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | struct kvec iov; |
| 910 | |
| 911 | iov.iov_base = ((char *) &svsk->sk_reclen) + svsk->sk_tcplen; |
| 912 | iov.iov_len = want; |
| 913 | if ((len = svc_recvfrom(rqstp, &iov, 1, want)) < 0) |
| 914 | goto error; |
| 915 | svsk->sk_tcplen += len; |
| 916 | |
| 917 | if (len < want) { |
Chuck Lever | c0401ea | 2008-04-14 12:27:30 -0400 | [diff] [blame] | 918 | dprintk("svc: short recvfrom while reading record " |
| 919 | "length (%d of %d)\n", len, want); |
Tom Tucker | a6046f7 | 2007-12-30 21:08:01 -0600 | [diff] [blame] | 920 | svc_xprt_received(&svsk->sk_xprt); |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 921 | goto err_again; /* record header not complete */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | } |
| 923 | |
| 924 | svsk->sk_reclen = ntohl(svsk->sk_reclen); |
Chuck Lever | c0401ea | 2008-04-14 12:27:30 -0400 | [diff] [blame] | 925 | if (!(svsk->sk_reclen & RPC_LAST_STREAM_FRAGMENT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | /* FIXME: technically, a record can be fragmented, |
| 927 | * and non-terminal fragments will not have the top |
| 928 | * bit set in the fragment length header. |
| 929 | * But apparently no known nfs clients send fragmented |
| 930 | * records. */ |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 931 | if (net_ratelimit()) |
Chuck Lever | c0401ea | 2008-04-14 12:27:30 -0400 | [diff] [blame] | 932 | printk(KERN_NOTICE "RPC: multiple fragments " |
| 933 | "per record not supported\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | goto err_delete; |
| 935 | } |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 936 | |
Chuck Lever | c0401ea | 2008-04-14 12:27:30 -0400 | [diff] [blame] | 937 | svsk->sk_reclen &= RPC_FRAGMENT_SIZE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | dprintk("svc: TCP record, %d bytes\n", svsk->sk_reclen); |
NeilBrown | c6b0a9f | 2006-10-06 00:44:05 -0700 | [diff] [blame] | 939 | if (svsk->sk_reclen > serv->sv_max_mesg) { |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 940 | if (net_ratelimit()) |
Chuck Lever | c0401ea | 2008-04-14 12:27:30 -0400 | [diff] [blame] | 941 | printk(KERN_NOTICE "RPC: " |
| 942 | "fragment too large: 0x%08lx\n", |
| 943 | (unsigned long)svsk->sk_reclen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | goto err_delete; |
| 945 | } |
| 946 | } |
| 947 | |
| 948 | /* Check whether enough data is available */ |
| 949 | len = svc_recv_available(svsk); |
| 950 | if (len < 0) |
| 951 | goto error; |
| 952 | |
| 953 | if (len < svsk->sk_reclen) { |
| 954 | dprintk("svc: incomplete TCP record (%d of %d)\n", |
| 955 | len, svsk->sk_reclen); |
Tom Tucker | a6046f7 | 2007-12-30 21:08:01 -0600 | [diff] [blame] | 956 | svc_xprt_received(&svsk->sk_xprt); |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 957 | goto err_again; /* record not complete */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | len = svsk->sk_reclen; |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 960 | set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 962 | return len; |
| 963 | error: |
| 964 | if (len == -EAGAIN) { |
| 965 | dprintk("RPC: TCP recv_record got EAGAIN\n"); |
| 966 | svc_xprt_received(&svsk->sk_xprt); |
| 967 | } |
| 968 | return len; |
| 969 | err_delete: |
| 970 | set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); |
| 971 | err_again: |
| 972 | return -EAGAIN; |
| 973 | } |
| 974 | |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 975 | static int svc_process_calldir(struct svc_sock *svsk, struct svc_rqst *rqstp, |
| 976 | struct rpc_rqst **reqpp, struct kvec *vec) |
| 977 | { |
| 978 | struct rpc_rqst *req = NULL; |
| 979 | u32 *p; |
| 980 | u32 xid; |
| 981 | u32 calldir; |
| 982 | int len; |
| 983 | |
| 984 | len = svc_recvfrom(rqstp, vec, 1, 8); |
| 985 | if (len < 0) |
| 986 | goto error; |
| 987 | |
| 988 | p = (u32 *)rqstp->rq_arg.head[0].iov_base; |
| 989 | xid = *p++; |
| 990 | calldir = *p; |
| 991 | |
| 992 | if (calldir == 0) { |
| 993 | /* REQUEST is the most common case */ |
| 994 | vec[0] = rqstp->rq_arg.head[0]; |
| 995 | } else { |
| 996 | /* REPLY */ |
| 997 | if (svsk->sk_bc_xprt) |
| 998 | req = xprt_lookup_rqst(svsk->sk_bc_xprt, xid); |
| 999 | |
| 1000 | if (!req) { |
| 1001 | printk(KERN_NOTICE |
| 1002 | "%s: Got unrecognized reply: " |
| 1003 | "calldir 0x%x sk_bc_xprt %p xid %08x\n", |
| 1004 | __func__, ntohl(calldir), |
| 1005 | svsk->sk_bc_xprt, xid); |
| 1006 | vec[0] = rqstp->rq_arg.head[0]; |
| 1007 | goto out; |
| 1008 | } |
| 1009 | |
| 1010 | memcpy(&req->rq_private_buf, &req->rq_rcv_buf, |
| 1011 | sizeof(struct xdr_buf)); |
| 1012 | /* copy the xid and call direction */ |
| 1013 | memcpy(req->rq_private_buf.head[0].iov_base, |
| 1014 | rqstp->rq_arg.head[0].iov_base, 8); |
| 1015 | vec[0] = req->rq_private_buf.head[0]; |
| 1016 | } |
| 1017 | out: |
| 1018 | vec[0].iov_base += 8; |
| 1019 | vec[0].iov_len -= 8; |
| 1020 | len = svsk->sk_reclen - 8; |
| 1021 | error: |
| 1022 | *reqpp = req; |
| 1023 | return len; |
| 1024 | } |
| 1025 | |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 1026 | /* |
| 1027 | * Receive data from a TCP socket. |
| 1028 | */ |
| 1029 | static int svc_tcp_recvfrom(struct svc_rqst *rqstp) |
| 1030 | { |
| 1031 | struct svc_sock *svsk = |
| 1032 | container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); |
| 1033 | struct svc_serv *serv = svsk->sk_xprt.xpt_server; |
| 1034 | int len; |
| 1035 | struct kvec *vec; |
| 1036 | int pnum, vlen; |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 1037 | struct rpc_rqst *req = NULL; |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 1038 | |
| 1039 | dprintk("svc: tcp_recv %p data %d conn %d close %d\n", |
| 1040 | svsk, test_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags), |
| 1041 | test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags), |
| 1042 | test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags)); |
| 1043 | |
| 1044 | len = svc_tcp_recv_record(svsk, rqstp); |
| 1045 | if (len < 0) |
| 1046 | goto error; |
| 1047 | |
NeilBrown | 3cc03b1 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 1048 | vec = rqstp->rq_vec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | vec[0] = rqstp->rq_arg.head[0]; |
| 1050 | vlen = PAGE_SIZE; |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 1051 | |
| 1052 | /* |
| 1053 | * We have enough data for the whole tcp record. Let's try and read the |
| 1054 | * first 8 bytes to get the xid and the call direction. We can use this |
| 1055 | * to figure out if this is a call or a reply to a callback. If |
| 1056 | * sk_reclen is < 8 (xid and calldir), then this is a malformed packet. |
| 1057 | * In that case, don't bother with the calldir and just read the data. |
| 1058 | * It will be rejected in svc_process. |
| 1059 | */ |
| 1060 | if (len >= 8) { |
| 1061 | len = svc_process_calldir(svsk, rqstp, &req, vec); |
| 1062 | if (len < 0) |
| 1063 | goto err_again; |
| 1064 | vlen -= 8; |
| 1065 | } |
| 1066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | pnum = 1; |
| 1068 | while (vlen < len) { |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 1069 | vec[pnum].iov_base = (req) ? |
| 1070 | page_address(req->rq_private_buf.pages[pnum - 1]) : |
| 1071 | page_address(rqstp->rq_pages[pnum]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | vec[pnum].iov_len = PAGE_SIZE; |
| 1073 | pnum++; |
| 1074 | vlen += PAGE_SIZE; |
| 1075 | } |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 1076 | rqstp->rq_respages = &rqstp->rq_pages[pnum]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | |
| 1078 | /* Now receive data */ |
| 1079 | len = svc_recvfrom(rqstp, vec, pnum, len); |
| 1080 | if (len < 0) |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 1081 | goto err_again; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 1083 | /* |
| 1084 | * Account for the 8 bytes we read earlier |
| 1085 | */ |
| 1086 | len += 8; |
| 1087 | |
| 1088 | if (req) { |
| 1089 | xprt_complete_rqst(req->rq_task, len); |
| 1090 | len = 0; |
| 1091 | goto out; |
| 1092 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | dprintk("svc: TCP complete record (%d bytes)\n", len); |
| 1094 | rqstp->rq_arg.len = len; |
| 1095 | rqstp->rq_arg.page_base = 0; |
| 1096 | if (len <= rqstp->rq_arg.head[0].iov_len) { |
| 1097 | rqstp->rq_arg.head[0].iov_len = len; |
| 1098 | rqstp->rq_arg.page_len = 0; |
| 1099 | } else { |
| 1100 | rqstp->rq_arg.page_len = len - rqstp->rq_arg.head[0].iov_len; |
| 1101 | } |
| 1102 | |
Tom Tucker | 5148bf4 | 2007-12-30 21:07:25 -0600 | [diff] [blame] | 1103 | rqstp->rq_xprt_ctxt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | rqstp->rq_prot = IPPROTO_TCP; |
| 1105 | |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 1106 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | /* Reset TCP read info */ |
| 1108 | svsk->sk_reclen = 0; |
| 1109 | svsk->sk_tcplen = 0; |
| 1110 | |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 1111 | svc_xprt_copy_addrs(rqstp, &svsk->sk_xprt); |
Tom Tucker | a6046f7 | 2007-12-30 21:08:01 -0600 | [diff] [blame] | 1112 | svc_xprt_received(&svsk->sk_xprt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | if (serv->sv_stats) |
| 1114 | serv->sv_stats->nettcpcnt++; |
| 1115 | |
| 1116 | return len; |
| 1117 | |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 1118 | err_again: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | if (len == -EAGAIN) { |
| 1120 | dprintk("RPC: TCP recvfrom got EAGAIN\n"); |
Tom Tucker | a6046f7 | 2007-12-30 21:08:01 -0600 | [diff] [blame] | 1121 | svc_xprt_received(&svsk->sk_xprt); |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 1122 | return len; |
| 1123 | } |
| 1124 | error: |
| 1125 | if (len != -EAGAIN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | printk(KERN_NOTICE "%s: recvfrom returned errno %d\n", |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 1127 | svsk->sk_xprt.xpt_server->sv_name, -len); |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 1128 | set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | } |
Alexandros Batsakis | 8f55f3c | 2009-08-20 03:34:19 +0300 | [diff] [blame] | 1130 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | * Send out data on TCP socket. |
| 1135 | */ |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 1136 | static int svc_tcp_sendto(struct svc_rqst *rqstp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | { |
| 1138 | struct xdr_buf *xbufp = &rqstp->rq_res; |
| 1139 | int sent; |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1140 | __be32 reclen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | |
| 1142 | /* Set up the first element of the reply kvec. |
| 1143 | * Any other kvecs that may be in use have been taken |
| 1144 | * care of by the server implementation itself. |
| 1145 | */ |
| 1146 | reclen = htonl(0x80000000|((xbufp->len ) - 4)); |
| 1147 | memcpy(xbufp->head[0].iov_base, &reclen, 4); |
| 1148 | |
Tom Tucker | 57b1d3b | 2007-12-30 21:08:22 -0600 | [diff] [blame] | 1149 | if (test_bit(XPT_DEAD, &rqstp->rq_xprt->xpt_flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | return -ENOTCONN; |
| 1151 | |
| 1152 | sent = svc_sendto(rqstp, &rqstp->rq_res); |
| 1153 | if (sent != xbufp->len) { |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 1154 | printk(KERN_NOTICE |
| 1155 | "rpc-srv/tcp: %s: %s %d when sending %d bytes " |
| 1156 | "- shutting down socket\n", |
Tom Tucker | 57b1d3b | 2007-12-30 21:08:22 -0600 | [diff] [blame] | 1157 | rqstp->rq_xprt->xpt_server->sv_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | (sent<0)?"got error":"sent only", |
| 1159 | sent, xbufp->len); |
Tom Tucker | 57b1d3b | 2007-12-30 21:08:22 -0600 | [diff] [blame] | 1160 | set_bit(XPT_CLOSE, &rqstp->rq_xprt->xpt_flags); |
Tom Tucker | f6150c3 | 2007-12-30 21:07:57 -0600 | [diff] [blame] | 1161 | svc_xprt_enqueue(rqstp->rq_xprt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | sent = -EAGAIN; |
| 1163 | } |
| 1164 | return sent; |
| 1165 | } |
| 1166 | |
Tom Tucker | e831fe6 | 2007-12-30 21:07:29 -0600 | [diff] [blame] | 1167 | /* |
| 1168 | * Setup response header. TCP has a 4B record length field. |
| 1169 | */ |
| 1170 | static void svc_tcp_prep_reply_hdr(struct svc_rqst *rqstp) |
| 1171 | { |
| 1172 | struct kvec *resv = &rqstp->rq_res.head[0]; |
| 1173 | |
| 1174 | /* tcp needs a space for the record length... */ |
| 1175 | svc_putnl(resv, 0); |
| 1176 | } |
| 1177 | |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 1178 | static int svc_tcp_has_wspace(struct svc_xprt *xprt) |
| 1179 | { |
Tom Tucker | 57b1d3b | 2007-12-30 21:08:22 -0600 | [diff] [blame] | 1180 | struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); |
Trond Myklebust | 47fcb03 | 2009-05-18 17:47:56 -0400 | [diff] [blame] | 1181 | struct svc_serv *serv = svsk->sk_xprt.xpt_server; |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 1182 | int required; |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 1183 | |
Trond Myklebust | 47fcb03 | 2009-05-18 17:47:56 -0400 | [diff] [blame] | 1184 | if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) |
| 1185 | return 1; |
| 1186 | required = atomic_read(&xprt->xpt_reserved) + serv->sv_max_mesg; |
| 1187 | if (sk_stream_wspace(svsk->sk_sk) >= required) |
| 1188 | return 1; |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 1189 | set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags); |
Trond Myklebust | 47fcb03 | 2009-05-18 17:47:56 -0400 | [diff] [blame] | 1190 | return 0; |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 1191 | } |
| 1192 | |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 1193 | static struct svc_xprt *svc_tcp_create(struct svc_serv *serv, |
| 1194 | struct sockaddr *sa, int salen, |
| 1195 | int flags) |
| 1196 | { |
| 1197 | return svc_create_socket(serv, IPPROTO_TCP, sa, salen, flags); |
| 1198 | } |
| 1199 | |
Tom Tucker | 360d8738 | 2007-12-30 21:07:17 -0600 | [diff] [blame] | 1200 | static struct svc_xprt_ops svc_tcp_ops = { |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 1201 | .xpo_create = svc_tcp_create, |
Tom Tucker | 5d13799 | 2007-12-30 21:07:23 -0600 | [diff] [blame] | 1202 | .xpo_recvfrom = svc_tcp_recvfrom, |
| 1203 | .xpo_sendto = svc_tcp_sendto, |
Tom Tucker | 5148bf4 | 2007-12-30 21:07:25 -0600 | [diff] [blame] | 1204 | .xpo_release_rqst = svc_release_skb, |
Trond Myklebust | 69b6ba3 | 2008-12-23 16:30:11 -0500 | [diff] [blame] | 1205 | .xpo_detach = svc_tcp_sock_detach, |
Tom Tucker | 755ccea | 2007-12-30 21:07:27 -0600 | [diff] [blame] | 1206 | .xpo_free = svc_sock_free, |
Tom Tucker | e831fe6 | 2007-12-30 21:07:29 -0600 | [diff] [blame] | 1207 | .xpo_prep_reply_hdr = svc_tcp_prep_reply_hdr, |
Tom Tucker | 323bee3 | 2007-12-30 21:07:31 -0600 | [diff] [blame] | 1208 | .xpo_has_wspace = svc_tcp_has_wspace, |
Tom Tucker | 38a417c | 2007-12-30 21:07:36 -0600 | [diff] [blame] | 1209 | .xpo_accept = svc_tcp_accept, |
Tom Tucker | 360d8738 | 2007-12-30 21:07:17 -0600 | [diff] [blame] | 1210 | }; |
| 1211 | |
| 1212 | static struct svc_xprt_class svc_tcp_class = { |
| 1213 | .xcl_name = "tcp", |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 1214 | .xcl_owner = THIS_MODULE, |
Tom Tucker | 360d8738 | 2007-12-30 21:07:17 -0600 | [diff] [blame] | 1215 | .xcl_ops = &svc_tcp_ops, |
Tom Tucker | 4902315 | 2007-12-30 21:07:21 -0600 | [diff] [blame] | 1216 | .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP, |
Tom Tucker | 360d8738 | 2007-12-30 21:07:17 -0600 | [diff] [blame] | 1217 | }; |
| 1218 | |
| 1219 | void svc_init_xprt_sock(void) |
| 1220 | { |
| 1221 | svc_reg_xprt_class(&svc_tcp_class); |
| 1222 | svc_reg_xprt_class(&svc_udp_class); |
| 1223 | } |
| 1224 | |
| 1225 | void svc_cleanup_xprt_sock(void) |
| 1226 | { |
| 1227 | svc_unreg_xprt_class(&svc_tcp_class); |
| 1228 | svc_unreg_xprt_class(&svc_udp_class); |
| 1229 | } |
| 1230 | |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 1231 | static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | { |
| 1233 | struct sock *sk = svsk->sk_sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 1235 | svc_xprt_init(&svc_tcp_class, &svsk->sk_xprt, serv); |
Tom Tucker | def13d7 | 2007-12-30 21:08:08 -0600 | [diff] [blame] | 1236 | set_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | if (sk->sk_state == TCP_LISTEN) { |
| 1238 | dprintk("setting up TCP socket for listening\n"); |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 1239 | set_bit(XPT_LISTENER, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | sk->sk_data_ready = svc_tcp_listen_data_ready; |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 1241 | set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | } else { |
| 1243 | dprintk("setting up TCP socket for reading\n"); |
| 1244 | sk->sk_state_change = svc_tcp_state_change; |
| 1245 | sk->sk_data_ready = svc_tcp_data_ready; |
Trond Myklebust | 47fcb03 | 2009-05-18 17:47:56 -0400 | [diff] [blame] | 1246 | sk->sk_write_space = svc_tcp_write_space; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | |
| 1248 | svsk->sk_reclen = 0; |
| 1249 | svsk->sk_tcplen = 0; |
| 1250 | |
Chuck Lever | b7872fe | 2008-04-14 12:27:01 -0400 | [diff] [blame] | 1251 | tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | |
J. Bruce Fields | 7f42183 | 2009-05-27 18:51:06 -0400 | [diff] [blame] | 1253 | /* initialise setting must have enough space to |
| 1254 | * receive and respond to one request. |
| 1255 | * svc_tcp_recvfrom will re-adjust if necessary |
| 1256 | */ |
| 1257 | svc_sock_setbufsize(svsk->sk_sock, |
| 1258 | 3 * svsk->sk_xprt.xpt_server->sv_max_mesg, |
| 1259 | 3 * svsk->sk_xprt.xpt_server->sv_max_mesg); |
| 1260 | |
| 1261 | set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags); |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 1262 | set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 1263 | if (sk->sk_state != TCP_ESTABLISHED) |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 1264 | set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | } |
| 1266 | } |
| 1267 | |
Tom Tucker | 0f0257e | 2007-12-30 21:08:27 -0600 | [diff] [blame] | 1268 | void svc_sock_update_bufs(struct svc_serv *serv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | { |
| 1270 | /* |
| 1271 | * The number of server threads has changed. Update |
| 1272 | * rcvbuf and sndbuf accordingly on all sockets |
| 1273 | */ |
| 1274 | struct list_head *le; |
| 1275 | |
| 1276 | spin_lock_bh(&serv->sv_lock); |
| 1277 | list_for_each(le, &serv->sv_permsocks) { |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 1278 | struct svc_sock *svsk = |
Tom Tucker | 7a18208 | 2007-12-30 21:07:53 -0600 | [diff] [blame] | 1279 | list_entry(le, struct svc_sock, sk_xprt.xpt_list); |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 1280 | set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | } |
| 1282 | list_for_each(le, &serv->sv_tempsocks) { |
| 1283 | struct svc_sock *svsk = |
Tom Tucker | 7a18208 | 2007-12-30 21:07:53 -0600 | [diff] [blame] | 1284 | list_entry(le, struct svc_sock, sk_xprt.xpt_list); |
Tom Tucker | 02fc6c3 | 2007-12-30 21:07:48 -0600 | [diff] [blame] | 1285 | set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | } |
| 1287 | spin_unlock_bh(&serv->sv_lock); |
| 1288 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 1289 | EXPORT_SYMBOL_GPL(svc_sock_update_bufs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | |
| 1291 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | * Initialize socket for RPC use and create svc_sock struct |
| 1293 | * XXX: May want to setsockopt SO_SNDBUF and SO_RCVBUF. |
| 1294 | */ |
Chuck Lever | 6b17433 | 2007-02-12 00:53:28 -0800 | [diff] [blame] | 1295 | static struct svc_sock *svc_setup_socket(struct svc_serv *serv, |
| 1296 | struct socket *sock, |
| 1297 | int *errp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | { |
| 1299 | struct svc_sock *svsk; |
| 1300 | struct sock *inet; |
Chuck Lever | 6b17433 | 2007-02-12 00:53:28 -0800 | [diff] [blame] | 1301 | int pmap_register = !(flags & SVC_SOCK_ANONYMOUS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | |
| 1303 | dprintk("svc: svc_setup_socket %p\n", sock); |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 1304 | if (!(svsk = kzalloc(sizeof(*svsk), GFP_KERNEL))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | *errp = -ENOMEM; |
| 1306 | return NULL; |
| 1307 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | |
| 1309 | inet = sock->sk; |
| 1310 | |
| 1311 | /* Register socket with portmapper */ |
| 1312 | if (*errp >= 0 && pmap_register) |
Chuck Lever | baf01ca | 2009-03-18 20:46:13 -0400 | [diff] [blame] | 1313 | *errp = svc_register(serv, inet->sk_family, inet->sk_protocol, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | ntohs(inet_sk(inet)->sport)); |
| 1315 | |
| 1316 | if (*errp < 0) { |
| 1317 | kfree(svsk); |
| 1318 | return NULL; |
| 1319 | } |
| 1320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | inet->sk_user_data = svsk; |
| 1322 | svsk->sk_sock = sock; |
| 1323 | svsk->sk_sk = inet; |
| 1324 | svsk->sk_ostate = inet->sk_state_change; |
| 1325 | svsk->sk_odata = inet->sk_data_ready; |
| 1326 | svsk->sk_owspace = inet->sk_write_space; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | |
| 1328 | /* Initialize the socket */ |
| 1329 | if (sock->type == SOCK_DGRAM) |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 1330 | svc_udp_init(svsk, serv); |
J. Bruce Fields | 7f42183 | 2009-05-27 18:51:06 -0400 | [diff] [blame] | 1331 | else |
Tom Tucker | bb5cf16 | 2007-12-30 21:07:50 -0600 | [diff] [blame] | 1332 | svc_tcp_init(svsk, serv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | dprintk("svc: svc_setup_socket created %p (inet %p)\n", |
| 1335 | svsk, svsk->sk_sk); |
| 1336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | return svsk; |
| 1338 | } |
| 1339 | |
Chuck Lever | bfba9ab | 2009-04-23 19:32:33 -0400 | [diff] [blame] | 1340 | /** |
| 1341 | * svc_addsock - add a listener socket to an RPC service |
| 1342 | * @serv: pointer to RPC service to which to add a new listener |
| 1343 | * @fd: file descriptor of the new listener |
| 1344 | * @name_return: pointer to buffer to fill in with name of listener |
| 1345 | * @len: size of the buffer |
| 1346 | * |
| 1347 | * Fills in socket name and returns positive length of name if successful. |
| 1348 | * Name is terminated with '\n'. On error, returns a negative errno |
| 1349 | * value. |
| 1350 | */ |
| 1351 | int svc_addsock(struct svc_serv *serv, const int fd, char *name_return, |
| 1352 | const size_t len) |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 1353 | { |
| 1354 | int err = 0; |
| 1355 | struct socket *so = sockfd_lookup(fd, &err); |
| 1356 | struct svc_sock *svsk = NULL; |
| 1357 | |
| 1358 | if (!so) |
| 1359 | return err; |
| 1360 | if (so->sk->sk_family != AF_INET) |
| 1361 | err = -EAFNOSUPPORT; |
| 1362 | else if (so->sk->sk_protocol != IPPROTO_TCP && |
| 1363 | so->sk->sk_protocol != IPPROTO_UDP) |
| 1364 | err = -EPROTONOSUPPORT; |
| 1365 | else if (so->state > SS_UNCONNECTED) |
| 1366 | err = -EISCONN; |
| 1367 | else { |
Tom Tucker | 2da2c21 | 2008-11-23 09:58:08 -0600 | [diff] [blame] | 1368 | if (!try_module_get(THIS_MODULE)) |
| 1369 | err = -ENOENT; |
| 1370 | else |
| 1371 | svsk = svc_setup_socket(serv, so, &err, |
| 1372 | SVC_SOCK_DEFAULTS); |
NeilBrown | e79eff1 | 2007-02-12 00:53:30 -0800 | [diff] [blame] | 1373 | if (svsk) { |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 1374 | struct sockaddr_storage addr; |
| 1375 | struct sockaddr *sin = (struct sockaddr *)&addr; |
| 1376 | int salen; |
| 1377 | if (kernel_getsockname(svsk->sk_sock, sin, &salen) == 0) |
| 1378 | svc_xprt_set_local(&svsk->sk_xprt, sin, salen); |
Tom Tucker | 4e5caaa | 2007-12-30 21:08:20 -0600 | [diff] [blame] | 1379 | clear_bit(XPT_TEMP, &svsk->sk_xprt.xpt_flags); |
| 1380 | spin_lock_bh(&serv->sv_lock); |
| 1381 | list_add(&svsk->sk_xprt.xpt_list, &serv->sv_permsocks); |
| 1382 | spin_unlock_bh(&serv->sv_lock); |
Tom Tucker | a6046f7 | 2007-12-30 21:08:01 -0600 | [diff] [blame] | 1383 | svc_xprt_received(&svsk->sk_xprt); |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 1384 | err = 0; |
Tom Tucker | 2da2c21 | 2008-11-23 09:58:08 -0600 | [diff] [blame] | 1385 | } else |
| 1386 | module_put(THIS_MODULE); |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 1387 | } |
| 1388 | if (err) { |
| 1389 | sockfd_put(so); |
| 1390 | return err; |
| 1391 | } |
Chuck Lever | e7942b9 | 2009-04-23 19:32:48 -0400 | [diff] [blame] | 1392 | return svc_one_sock_name(svsk, name_return, len); |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 1393 | } |
| 1394 | EXPORT_SYMBOL_GPL(svc_addsock); |
| 1395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | /* |
| 1397 | * Create socket for RPC service. |
| 1398 | */ |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 1399 | static struct svc_xprt *svc_create_socket(struct svc_serv *serv, |
| 1400 | int protocol, |
| 1401 | struct sockaddr *sin, int len, |
| 1402 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | { |
| 1404 | struct svc_sock *svsk; |
| 1405 | struct socket *sock; |
| 1406 | int error; |
| 1407 | int type; |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 1408 | struct sockaddr_storage addr; |
| 1409 | struct sockaddr *newsin = (struct sockaddr *)&addr; |
| 1410 | int newlen; |
Trond Myklebust | c69da77 | 2009-03-30 18:59:17 -0400 | [diff] [blame] | 1411 | int family; |
| 1412 | int val; |
Pavel Emelyanov | 5216a8e | 2008-02-21 10:57:45 +0300 | [diff] [blame] | 1413 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | |
Chuck Lever | ad06e4b | 2007-02-12 00:53:32 -0800 | [diff] [blame] | 1415 | dprintk("svc: svc_create_socket(%s, %d, %s)\n", |
| 1416 | serv->sv_program->pg_name, protocol, |
Chuck Lever | 77f1f67 | 2007-02-12 00:53:39 -0800 | [diff] [blame] | 1417 | __svc_print_addr(sin, buf, sizeof(buf))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | |
| 1419 | if (protocol != IPPROTO_UDP && protocol != IPPROTO_TCP) { |
| 1420 | printk(KERN_WARNING "svc: only UDP and TCP " |
| 1421 | "sockets supported\n"); |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 1422 | return ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | |
Trond Myklebust | c69da77 | 2009-03-30 18:59:17 -0400 | [diff] [blame] | 1425 | type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM; |
| 1426 | switch (sin->sa_family) { |
| 1427 | case AF_INET6: |
| 1428 | family = PF_INET6; |
| 1429 | break; |
| 1430 | case AF_INET: |
| 1431 | family = PF_INET; |
| 1432 | break; |
| 1433 | default: |
| 1434 | return ERR_PTR(-EINVAL); |
| 1435 | } |
| 1436 | |
| 1437 | error = sock_create_kern(family, type, protocol, &sock); |
Chuck Lever | 77f1f67 | 2007-02-12 00:53:39 -0800 | [diff] [blame] | 1438 | if (error < 0) |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 1439 | return ERR_PTR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 1441 | svc_reclassify_socket(sock); |
| 1442 | |
Trond Myklebust | c69da77 | 2009-03-30 18:59:17 -0400 | [diff] [blame] | 1443 | /* |
| 1444 | * If this is an PF_INET6 listener, we want to avoid |
| 1445 | * getting requests from IPv4 remotes. Those should |
| 1446 | * be shunted to a PF_INET listener via rpcbind. |
| 1447 | */ |
| 1448 | val = 1; |
| 1449 | if (family == PF_INET6) |
| 1450 | kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY, |
| 1451 | (char *)&val, sizeof(val)); |
| 1452 | |
Eric Sesterhenn | 1811474 | 2006-09-28 14:37:07 -0700 | [diff] [blame] | 1453 | if (type == SOCK_STREAM) |
Chuck Lever | 77f1f67 | 2007-02-12 00:53:39 -0800 | [diff] [blame] | 1454 | sock->sk->sk_reuse = 1; /* allow address reuse */ |
| 1455 | error = kernel_bind(sock, sin, len); |
Eric Sesterhenn | 1811474 | 2006-09-28 14:37:07 -0700 | [diff] [blame] | 1456 | if (error < 0) |
| 1457 | goto bummer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 1459 | newlen = len; |
| 1460 | error = kernel_getsockname(sock, newsin, &newlen); |
| 1461 | if (error < 0) |
| 1462 | goto bummer; |
| 1463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | if (protocol == IPPROTO_TCP) { |
Sridhar Samudrala | e6242e9 | 2006-08-07 20:58:01 -0700 | [diff] [blame] | 1465 | if ((error = kernel_listen(sock, 64)) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | goto bummer; |
| 1467 | } |
| 1468 | |
NeilBrown | e79eff1 | 2007-02-12 00:53:30 -0800 | [diff] [blame] | 1469 | if ((svsk = svc_setup_socket(serv, sock, &error, flags)) != NULL) { |
Tom Tucker | 9dbc240 | 2007-12-30 21:08:12 -0600 | [diff] [blame] | 1470 | svc_xprt_set_local(&svsk->sk_xprt, newsin, newlen); |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 1471 | return (struct svc_xprt *)svsk; |
NeilBrown | e79eff1 | 2007-02-12 00:53:30 -0800 | [diff] [blame] | 1472 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | |
| 1474 | bummer: |
| 1475 | dprintk("svc: svc_create_socket error = %d\n", -error); |
| 1476 | sock_release(sock); |
Tom Tucker | b700cbb | 2007-12-30 21:07:42 -0600 | [diff] [blame] | 1477 | return ERR_PTR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | } |
| 1479 | |
| 1480 | /* |
Tom Tucker | 755ccea | 2007-12-30 21:07:27 -0600 | [diff] [blame] | 1481 | * Detach the svc_sock from the socket so that no |
| 1482 | * more callbacks occur. |
| 1483 | */ |
| 1484 | static void svc_sock_detach(struct svc_xprt *xprt) |
| 1485 | { |
| 1486 | struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); |
| 1487 | struct sock *sk = svsk->sk_sk; |
| 1488 | |
| 1489 | dprintk("svc: svc_sock_detach(%p)\n", svsk); |
| 1490 | |
| 1491 | /* put back the old socket callbacks */ |
| 1492 | sk->sk_state_change = svsk->sk_ostate; |
| 1493 | sk->sk_data_ready = svsk->sk_odata; |
| 1494 | sk->sk_write_space = svsk->sk_owspace; |
Trond Myklebust | 69b6ba3 | 2008-12-23 16:30:11 -0500 | [diff] [blame] | 1495 | |
| 1496 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) |
| 1497 | wake_up_interruptible(sk->sk_sleep); |
| 1498 | } |
| 1499 | |
| 1500 | /* |
| 1501 | * Disconnect the socket, and reset the callbacks |
| 1502 | */ |
| 1503 | static void svc_tcp_sock_detach(struct svc_xprt *xprt) |
| 1504 | { |
| 1505 | struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); |
| 1506 | |
| 1507 | dprintk("svc: svc_tcp_sock_detach(%p)\n", svsk); |
| 1508 | |
| 1509 | svc_sock_detach(xprt); |
| 1510 | |
| 1511 | if (!test_bit(XPT_LISTENER, &xprt->xpt_flags)) |
| 1512 | kernel_sock_shutdown(svsk->sk_sock, SHUT_RDWR); |
Tom Tucker | 755ccea | 2007-12-30 21:07:27 -0600 | [diff] [blame] | 1513 | } |
| 1514 | |
| 1515 | /* |
| 1516 | * Free the svc_sock's socket resources and the svc_sock itself. |
| 1517 | */ |
| 1518 | static void svc_sock_free(struct svc_xprt *xprt) |
| 1519 | { |
| 1520 | struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); |
| 1521 | dprintk("svc: svc_sock_free(%p)\n", svsk); |
| 1522 | |
Tom Tucker | 755ccea | 2007-12-30 21:07:27 -0600 | [diff] [blame] | 1523 | if (svsk->sk_sock->file) |
| 1524 | sockfd_put(svsk->sk_sock); |
| 1525 | else |
| 1526 | sock_release(svsk->sk_sock); |
| 1527 | kfree(svsk); |
| 1528 | } |
Benny Halevy | 7652e5a | 2009-04-01 09:23:09 -0400 | [diff] [blame] | 1529 | |
| 1530 | /* |
| 1531 | * Create a svc_xprt. |
| 1532 | * |
| 1533 | * For internal use only (e.g. nfsv4.1 backchannel). |
| 1534 | * Callers should typically use the xpo_create() method. |
| 1535 | */ |
| 1536 | struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot) |
| 1537 | { |
| 1538 | struct svc_sock *svsk; |
| 1539 | struct svc_xprt *xprt = NULL; |
| 1540 | |
| 1541 | dprintk("svc: %s\n", __func__); |
| 1542 | svsk = kzalloc(sizeof(*svsk), GFP_KERNEL); |
| 1543 | if (!svsk) |
| 1544 | goto out; |
| 1545 | |
| 1546 | xprt = &svsk->sk_xprt; |
| 1547 | if (prot == IPPROTO_TCP) |
| 1548 | svc_xprt_init(&svc_tcp_class, xprt, serv); |
| 1549 | else if (prot == IPPROTO_UDP) |
| 1550 | svc_xprt_init(&svc_udp_class, xprt, serv); |
| 1551 | else |
| 1552 | BUG(); |
| 1553 | out: |
| 1554 | dprintk("svc: %s return %p\n", __func__, xprt); |
| 1555 | return xprt; |
| 1556 | } |
| 1557 | EXPORT_SYMBOL_GPL(svc_sock_create); |
| 1558 | |
| 1559 | /* |
| 1560 | * Destroy a svc_sock. |
| 1561 | */ |
| 1562 | void svc_sock_destroy(struct svc_xprt *xprt) |
| 1563 | { |
| 1564 | if (xprt) |
| 1565 | kfree(container_of(xprt, struct svc_sock, sk_xprt)); |
| 1566 | } |
| 1567 | EXPORT_SYMBOL_GPL(svc_sock_destroy); |