Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1 | /* |
| 2 | * linux/net/sunrpc/xprtsock.c |
| 3 | * |
| 4 | * Client-side transport implementation for sockets. |
| 5 | * |
Alan Cox | 113aa83 | 2008-10-13 19:01:08 -0700 | [diff] [blame] | 6 | * TCP callback races fixes (C) 1998 Red Hat |
| 7 | * TCP send fixes (C) 1998 Red Hat |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 8 | * TCP NFS related read + write fixes |
| 9 | * (C) 1999 Dave Airlie, University of Limerick, Ireland <airlied@linux.ie> |
| 10 | * |
| 11 | * Rewrite of larges part of the code in order to stabilize TCP stuff. |
| 12 | * Fix behaviour when socket buffer is full. |
| 13 | * (C) 1999 Trond Myklebust <trond.myklebust@fys.uio.no> |
Chuck Lever | 55aa4f5 | 2005-08-11 16:25:47 -0400 | [diff] [blame] | 14 | * |
| 15 | * IP socket transport implementation, (C) 2005 Chuck Lever <cel@netapp.com> |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 16 | * |
| 17 | * IPv6 support contributed by Gilles Quillard, Bull Open Source, 2005. |
| 18 | * <gilles.quillard@bull.net> |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 19 | */ |
| 20 | |
| 21 | #include <linux/types.h> |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 22 | #include <linux/string.h> |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 23 | #include <linux/slab.h> |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 24 | #include <linux/module.h> |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 25 | #include <linux/capability.h> |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 26 | #include <linux/pagemap.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/socket.h> |
| 29 | #include <linux/in.h> |
| 30 | #include <linux/net.h> |
| 31 | #include <linux/mm.h> |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 32 | #include <linux/un.h> |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 33 | #include <linux/udp.h> |
| 34 | #include <linux/tcp.h> |
| 35 | #include <linux/sunrpc/clnt.h> |
Jeff Layton | 5976687 | 2013-02-04 12:50:00 -0500 | [diff] [blame] | 36 | #include <linux/sunrpc/addr.h> |
Chuck Lever | 0210714 | 2006-01-03 09:55:49 +0100 | [diff] [blame] | 37 | #include <linux/sunrpc/sched.h> |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 38 | #include <linux/sunrpc/svcsock.h> |
\"Talpey, Thomas\ | 49c36fc | 2007-09-10 13:47:31 -0400 | [diff] [blame] | 39 | #include <linux/sunrpc/xprtsock.h> |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 40 | #include <linux/file.h> |
Trond Myklebust | 9e00abc | 2011-07-13 19:20:49 -0400 | [diff] [blame] | 41 | #ifdef CONFIG_SUNRPC_BACKCHANNEL |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 42 | #include <linux/sunrpc/bc_xprt.h> |
| 43 | #endif |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 44 | |
| 45 | #include <net/sock.h> |
| 46 | #include <net/checksum.h> |
| 47 | #include <net/udp.h> |
| 48 | #include <net/tcp.h> |
| 49 | |
Trond Myklebust | 40b5ea0 | 2013-09-04 12:16:23 -0400 | [diff] [blame] | 50 | #include <trace/events/sunrpc.h> |
| 51 | |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 52 | #include "sunrpc.h" |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 53 | |
| 54 | static void xs_close(struct rpc_xprt *xprt); |
| 55 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 56 | /* |
Chuck Lever | c556b75 | 2005-11-01 12:24:48 -0500 | [diff] [blame] | 57 | * xprtsock tunables |
| 58 | */ |
Trond Myklebust | 09acfea | 2012-03-11 15:22:54 -0400 | [diff] [blame] | 59 | static unsigned int xprt_udp_slot_table_entries = RPC_DEF_SLOT_TABLE; |
| 60 | static unsigned int xprt_tcp_slot_table_entries = RPC_MIN_SLOT_TABLE; |
| 61 | static unsigned int xprt_max_tcp_slot_table_entries = RPC_MAX_SLOT_TABLE; |
Chuck Lever | c556b75 | 2005-11-01 12:24:48 -0500 | [diff] [blame] | 62 | |
Trond Myklebust | 09acfea | 2012-03-11 15:22:54 -0400 | [diff] [blame] | 63 | static unsigned int xprt_min_resvport = RPC_DEF_MIN_RESVPORT; |
| 64 | static unsigned int xprt_max_resvport = RPC_DEF_MAX_RESVPORT; |
Chuck Lever | c556b75 | 2005-11-01 12:24:48 -0500 | [diff] [blame] | 65 | |
Trond Myklebust | 54c0987 | 2015-02-09 11:01:02 -0500 | [diff] [blame] | 66 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
| 67 | |
Trond Myklebust | 7d1e825 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 68 | #define XS_TCP_LINGER_TO (15U * HZ) |
Trond Myklebust | 25fe614 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 69 | static unsigned int xs_tcp_fin_timeout __read_mostly = XS_TCP_LINGER_TO; |
Trond Myklebust | 7d1e825 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 70 | |
Chuck Lever | c556b75 | 2005-11-01 12:24:48 -0500 | [diff] [blame] | 71 | /* |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 72 | * We can register our own files under /proc/sys/sunrpc by |
| 73 | * calling register_sysctl_table() again. The files in that |
| 74 | * directory become the union of all files registered there. |
| 75 | * |
| 76 | * We simply need to make sure that we don't collide with |
| 77 | * someone else's file names! |
| 78 | */ |
| 79 | |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 80 | static unsigned int min_slot_table_size = RPC_MIN_SLOT_TABLE; |
| 81 | static unsigned int max_slot_table_size = RPC_MAX_SLOT_TABLE; |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 82 | static unsigned int max_tcp_slot_table_limit = RPC_MAX_SLOT_TABLE_LIMIT; |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 83 | static unsigned int xprt_min_resvport_limit = RPC_MIN_RESVPORT; |
| 84 | static unsigned int xprt_max_resvport_limit = RPC_MAX_RESVPORT; |
| 85 | |
| 86 | static struct ctl_table_header *sunrpc_table_header; |
| 87 | |
| 88 | /* |
| 89 | * FIXME: changing the UDP slot table size should also resize the UDP |
| 90 | * socket buffers for existing UDP transports |
| 91 | */ |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 92 | static struct ctl_table xs_tunables_table[] = { |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 93 | { |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 94 | .procname = "udp_slot_table_entries", |
| 95 | .data = &xprt_udp_slot_table_entries, |
| 96 | .maxlen = sizeof(unsigned int), |
| 97 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 98 | .proc_handler = proc_dointvec_minmax, |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 99 | .extra1 = &min_slot_table_size, |
| 100 | .extra2 = &max_slot_table_size |
| 101 | }, |
| 102 | { |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 103 | .procname = "tcp_slot_table_entries", |
| 104 | .data = &xprt_tcp_slot_table_entries, |
| 105 | .maxlen = sizeof(unsigned int), |
| 106 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 107 | .proc_handler = proc_dointvec_minmax, |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 108 | .extra1 = &min_slot_table_size, |
| 109 | .extra2 = &max_slot_table_size |
| 110 | }, |
| 111 | { |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 112 | .procname = "tcp_max_slot_table_entries", |
| 113 | .data = &xprt_max_tcp_slot_table_entries, |
| 114 | .maxlen = sizeof(unsigned int), |
| 115 | .mode = 0644, |
| 116 | .proc_handler = proc_dointvec_minmax, |
| 117 | .extra1 = &min_slot_table_size, |
| 118 | .extra2 = &max_tcp_slot_table_limit |
| 119 | }, |
| 120 | { |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 121 | .procname = "min_resvport", |
| 122 | .data = &xprt_min_resvport, |
| 123 | .maxlen = sizeof(unsigned int), |
| 124 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 125 | .proc_handler = proc_dointvec_minmax, |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 126 | .extra1 = &xprt_min_resvport_limit, |
| 127 | .extra2 = &xprt_max_resvport_limit |
| 128 | }, |
| 129 | { |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 130 | .procname = "max_resvport", |
| 131 | .data = &xprt_max_resvport, |
| 132 | .maxlen = sizeof(unsigned int), |
| 133 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 134 | .proc_handler = proc_dointvec_minmax, |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 135 | .extra1 = &xprt_min_resvport_limit, |
| 136 | .extra2 = &xprt_max_resvport_limit |
| 137 | }, |
| 138 | { |
Trond Myklebust | 25fe614 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 139 | .procname = "tcp_fin_timeout", |
| 140 | .data = &xs_tcp_fin_timeout, |
| 141 | .maxlen = sizeof(xs_tcp_fin_timeout), |
| 142 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 143 | .proc_handler = proc_dointvec_jiffies, |
Trond Myklebust | 25fe614 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 144 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 145 | { }, |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 146 | }; |
| 147 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 148 | static struct ctl_table sunrpc_table[] = { |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 149 | { |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 150 | .procname = "sunrpc", |
| 151 | .mode = 0555, |
| 152 | .child = xs_tunables_table |
| 153 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 154 | { }, |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 155 | }; |
| 156 | |
| 157 | #endif |
| 158 | |
| 159 | /* |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 160 | * Wait duration for a reply from the RPC portmapper. |
| 161 | */ |
| 162 | #define XS_BIND_TO (60U * HZ) |
| 163 | |
| 164 | /* |
| 165 | * Delay if a UDP socket connect error occurs. This is most likely some |
| 166 | * kind of resource problem on the local host. |
| 167 | */ |
| 168 | #define XS_UDP_REEST_TO (2U * HZ) |
| 169 | |
| 170 | /* |
| 171 | * The reestablish timeout allows clients to delay for a bit before attempting |
| 172 | * to reconnect to a server that just dropped our connection. |
| 173 | * |
| 174 | * We implement an exponential backoff when trying to reestablish a TCP |
| 175 | * transport connection with the server. Some servers like to drop a TCP |
| 176 | * connection when they are overworked, so we start with a short timeout and |
| 177 | * increase over time if the server is down or not responding. |
| 178 | */ |
| 179 | #define XS_TCP_INIT_REEST_TO (3U * HZ) |
| 180 | #define XS_TCP_MAX_REEST_TO (5U * 60 * HZ) |
| 181 | |
| 182 | /* |
| 183 | * TCP idle timeout; client drops the transport socket if it is idle |
| 184 | * for this long. Note that we also timeout UDP sockets to prevent |
| 185 | * holding port numbers when there is no RPC traffic. |
| 186 | */ |
| 187 | #define XS_IDLE_DISC_TO (5U * 60 * HZ) |
| 188 | |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame] | 189 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 190 | # undef RPC_DEBUG_DATA |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 191 | # define RPCDBG_FACILITY RPCDBG_TRANS |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 192 | #endif |
| 193 | |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 194 | #ifdef RPC_DEBUG_DATA |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 195 | static void xs_pktdump(char *msg, u32 *packet, unsigned int count) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 196 | { |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 197 | u8 *buf = (u8 *) packet; |
| 198 | int j; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 199 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 200 | dprintk("RPC: %s\n", msg); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 201 | for (j = 0; j < count && j < 128; j += 4) { |
| 202 | if (!(j & 31)) { |
| 203 | if (j) |
| 204 | dprintk("\n"); |
| 205 | dprintk("0x%04x ", j); |
| 206 | } |
| 207 | dprintk("%02x%02x%02x%02x ", |
| 208 | buf[j], buf[j+1], buf[j+2], buf[j+3]); |
| 209 | } |
| 210 | dprintk("\n"); |
| 211 | } |
| 212 | #else |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 213 | static inline void xs_pktdump(char *msg, u32 *packet, unsigned int count) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 214 | { |
| 215 | /* NOP */ |
| 216 | } |
| 217 | #endif |
| 218 | |
Trond Myklebust | 2118071 | 2013-12-31 13:22:59 -0500 | [diff] [blame] | 219 | static inline struct rpc_xprt *xprt_from_sock(struct sock *sk) |
| 220 | { |
| 221 | return (struct rpc_xprt *) sk->sk_user_data; |
| 222 | } |
| 223 | |
Chuck Lever | 95392c5 | 2007-08-06 11:57:58 -0400 | [diff] [blame] | 224 | static inline struct sockaddr *xs_addr(struct rpc_xprt *xprt) |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 225 | { |
Chuck Lever | 95392c5 | 2007-08-06 11:57:58 -0400 | [diff] [blame] | 226 | return (struct sockaddr *) &xprt->addr; |
| 227 | } |
| 228 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 229 | static inline struct sockaddr_un *xs_addr_un(struct rpc_xprt *xprt) |
| 230 | { |
| 231 | return (struct sockaddr_un *) &xprt->addr; |
| 232 | } |
| 233 | |
Chuck Lever | 95392c5 | 2007-08-06 11:57:58 -0400 | [diff] [blame] | 234 | static inline struct sockaddr_in *xs_addr_in(struct rpc_xprt *xprt) |
| 235 | { |
| 236 | return (struct sockaddr_in *) &xprt->addr; |
| 237 | } |
| 238 | |
| 239 | static inline struct sockaddr_in6 *xs_addr_in6(struct rpc_xprt *xprt) |
| 240 | { |
| 241 | return (struct sockaddr_in6 *) &xprt->addr; |
| 242 | } |
| 243 | |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 244 | static void xs_format_common_peer_addresses(struct rpc_xprt *xprt) |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 245 | { |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 246 | struct sockaddr *sap = xs_addr(xprt); |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 247 | struct sockaddr_in6 *sin6; |
| 248 | struct sockaddr_in *sin; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 249 | struct sockaddr_un *sun; |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 250 | char buf[128]; |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 251 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 252 | switch (sap->sa_family) { |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 253 | case AF_LOCAL: |
| 254 | sun = xs_addr_un(xprt); |
| 255 | strlcpy(buf, sun->sun_path, sizeof(buf)); |
| 256 | xprt->address_strings[RPC_DISPLAY_ADDR] = |
| 257 | kstrdup(buf, GFP_KERNEL); |
| 258 | break; |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 259 | case AF_INET: |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 260 | (void)rpc_ntop(sap, buf, sizeof(buf)); |
| 261 | xprt->address_strings[RPC_DISPLAY_ADDR] = |
| 262 | kstrdup(buf, GFP_KERNEL); |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 263 | sin = xs_addr_in(xprt); |
Joe Perches | fc0b5791 | 2010-03-08 12:15:28 -0800 | [diff] [blame] | 264 | snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr)); |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 265 | break; |
| 266 | case AF_INET6: |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 267 | (void)rpc_ntop(sap, buf, sizeof(buf)); |
| 268 | xprt->address_strings[RPC_DISPLAY_ADDR] = |
| 269 | kstrdup(buf, GFP_KERNEL); |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 270 | sin6 = xs_addr_in6(xprt); |
Joe Perches | fc0b5791 | 2010-03-08 12:15:28 -0800 | [diff] [blame] | 271 | snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr); |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 272 | break; |
| 273 | default: |
| 274 | BUG(); |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 275 | } |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 276 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 277 | xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL); |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 278 | } |
| 279 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 280 | static void xs_format_common_peer_ports(struct rpc_xprt *xprt) |
Chuck Lever | 4b6473f | 2007-08-06 11:57:12 -0400 | [diff] [blame] | 281 | { |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 282 | struct sockaddr *sap = xs_addr(xprt); |
| 283 | char buf[128]; |
Chuck Lever | 4b6473f | 2007-08-06 11:57:12 -0400 | [diff] [blame] | 284 | |
Joe Perches | 81160e66 | 2010-03-08 12:15:59 -0800 | [diff] [blame] | 285 | snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap)); |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 286 | xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL); |
Chuck Lever | 4b6473f | 2007-08-06 11:57:12 -0400 | [diff] [blame] | 287 | |
Joe Perches | 81160e66 | 2010-03-08 12:15:59 -0800 | [diff] [blame] | 288 | snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap)); |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 289 | xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL); |
| 290 | } |
Chuck Lever | 4b6473f | 2007-08-06 11:57:12 -0400 | [diff] [blame] | 291 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 292 | static void xs_format_peer_addresses(struct rpc_xprt *xprt, |
| 293 | const char *protocol, |
| 294 | const char *netid) |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 295 | { |
Chuck Lever | b454ae9 | 2008-01-07 18:34:48 -0500 | [diff] [blame] | 296 | xprt->address_strings[RPC_DISPLAY_PROTO] = protocol; |
Chuck Lever | b454ae9 | 2008-01-07 18:34:48 -0500 | [diff] [blame] | 297 | xprt->address_strings[RPC_DISPLAY_NETID] = netid; |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 298 | xs_format_common_peer_addresses(xprt); |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 299 | xs_format_common_peer_ports(xprt); |
Chuck Lever | 4b6473f | 2007-08-06 11:57:12 -0400 | [diff] [blame] | 300 | } |
| 301 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 302 | static void xs_update_peer_port(struct rpc_xprt *xprt) |
Chuck Lever | 4b6473f | 2007-08-06 11:57:12 -0400 | [diff] [blame] | 303 | { |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 304 | kfree(xprt->address_strings[RPC_DISPLAY_HEX_PORT]); |
| 305 | kfree(xprt->address_strings[RPC_DISPLAY_PORT]); |
Chuck Lever | 4b6473f | 2007-08-06 11:57:12 -0400 | [diff] [blame] | 306 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 307 | xs_format_common_peer_ports(xprt); |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | static void xs_free_peer_addresses(struct rpc_xprt *xprt) |
| 311 | { |
Chuck Lever | 33e01dc | 2008-01-14 12:32:20 -0500 | [diff] [blame] | 312 | unsigned int i; |
| 313 | |
| 314 | for (i = 0; i < RPC_DISPLAY_MAX; i++) |
| 315 | switch (i) { |
| 316 | case RPC_DISPLAY_PROTO: |
| 317 | case RPC_DISPLAY_NETID: |
| 318 | continue; |
| 319 | default: |
| 320 | kfree(xprt->address_strings[i]); |
| 321 | } |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 322 | } |
| 323 | |
Chuck Lever | b4b5cc8 | 2005-08-11 16:25:29 -0400 | [diff] [blame] | 324 | #define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL) |
| 325 | |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 326 | static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, struct kvec *vec, unsigned int base, int more) |
Chuck Lever | b4b5cc8 | 2005-08-11 16:25:29 -0400 | [diff] [blame] | 327 | { |
Chuck Lever | b4b5cc8 | 2005-08-11 16:25:29 -0400 | [diff] [blame] | 328 | struct msghdr msg = { |
| 329 | .msg_name = addr, |
| 330 | .msg_namelen = addrlen, |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 331 | .msg_flags = XS_SENDMSG_FLAGS | (more ? MSG_MORE : 0), |
| 332 | }; |
| 333 | struct kvec iov = { |
| 334 | .iov_base = vec->iov_base + base, |
| 335 | .iov_len = vec->iov_len - base, |
Chuck Lever | b4b5cc8 | 2005-08-11 16:25:29 -0400 | [diff] [blame] | 336 | }; |
| 337 | |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 338 | if (iov.iov_len != 0) |
Chuck Lever | b4b5cc8 | 2005-08-11 16:25:29 -0400 | [diff] [blame] | 339 | return kernel_sendmsg(sock, &msg, &iov, 1, iov.iov_len); |
| 340 | return kernel_sendmsg(sock, &msg, NULL, 0, 0); |
| 341 | } |
| 342 | |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 343 | static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more, bool zerocopy, int *sent_p) |
Chuck Lever | b4b5cc8 | 2005-08-11 16:25:29 -0400 | [diff] [blame] | 344 | { |
Trond Myklebust | a6b31d1 | 2013-11-08 16:03:50 -0500 | [diff] [blame] | 345 | ssize_t (*do_sendpage)(struct socket *sock, struct page *page, |
| 346 | int offset, size_t size, int flags); |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 347 | struct page **ppage; |
| 348 | unsigned int remainder; |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 349 | int err; |
Chuck Lever | b4b5cc8 | 2005-08-11 16:25:29 -0400 | [diff] [blame] | 350 | |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 351 | remainder = xdr->page_len - base; |
| 352 | base += xdr->page_base; |
| 353 | ppage = xdr->pages + (base >> PAGE_SHIFT); |
| 354 | base &= ~PAGE_MASK; |
Trond Myklebust | a6b31d1 | 2013-11-08 16:03:50 -0500 | [diff] [blame] | 355 | do_sendpage = sock->ops->sendpage; |
| 356 | if (!zerocopy) |
| 357 | do_sendpage = sock_no_sendpage; |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 358 | for(;;) { |
| 359 | unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder); |
| 360 | int flags = XS_SENDMSG_FLAGS; |
| 361 | |
| 362 | remainder -= len; |
Trond Myklebust | 31303d6 | 2015-10-06 15:59:20 -0400 | [diff] [blame] | 363 | if (more) |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 364 | flags |= MSG_MORE; |
Trond Myklebust | 31303d6 | 2015-10-06 15:59:20 -0400 | [diff] [blame] | 365 | if (remainder != 0) |
| 366 | flags |= MSG_SENDPAGE_NOTLAST | MSG_MORE; |
Trond Myklebust | a6b31d1 | 2013-11-08 16:03:50 -0500 | [diff] [blame] | 367 | err = do_sendpage(sock, *ppage, base, len, flags); |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 368 | if (remainder == 0 || err != len) |
| 369 | break; |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 370 | *sent_p += err; |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 371 | ppage++; |
| 372 | base = 0; |
| 373 | } |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 374 | if (err > 0) { |
| 375 | *sent_p += err; |
| 376 | err = 0; |
| 377 | } |
| 378 | return err; |
Chuck Lever | b4b5cc8 | 2005-08-11 16:25:29 -0400 | [diff] [blame] | 379 | } |
| 380 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 381 | /** |
| 382 | * xs_sendpages - write pages directly to a socket |
| 383 | * @sock: socket to send on |
| 384 | * @addr: UDP only -- address of destination |
| 385 | * @addrlen: UDP only -- length of destination address |
| 386 | * @xdr: buffer containing this request |
| 387 | * @base: starting position in the buffer |
Trond Myklebust | a6b31d1 | 2013-11-08 16:03:50 -0500 | [diff] [blame] | 388 | * @zerocopy: true if it is safe to use sendpage() |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 389 | * @sent_p: return the total number of bytes successfully queued for sending |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 390 | * |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 391 | */ |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 392 | static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base, bool zerocopy, int *sent_p) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 393 | { |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 394 | unsigned int remainder = xdr->len - base; |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 395 | int err = 0; |
| 396 | int sent = 0; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 397 | |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 398 | if (unlikely(!sock)) |
Trond Myklebust | fba91af | 2009-03-11 14:06:41 -0400 | [diff] [blame] | 399 | return -ENOTSOCK; |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 400 | |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 401 | if (base != 0) { |
| 402 | addr = NULL; |
| 403 | addrlen = 0; |
| 404 | } |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 405 | |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 406 | if (base < xdr->head[0].iov_len || addr != NULL) { |
| 407 | unsigned int len = xdr->head[0].iov_len - base; |
| 408 | remainder -= len; |
| 409 | err = xs_send_kvec(sock, addr, addrlen, &xdr->head[0], base, remainder != 0); |
| 410 | if (remainder == 0 || err != len) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 411 | goto out; |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 412 | *sent_p += err; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 413 | base = 0; |
| 414 | } else |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 415 | base -= xdr->head[0].iov_len; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 416 | |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 417 | if (base < xdr->page_len) { |
| 418 | unsigned int len = xdr->page_len - base; |
| 419 | remainder -= len; |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 420 | err = xs_send_pagedata(sock, xdr, base, remainder != 0, zerocopy, &sent); |
| 421 | *sent_p += sent; |
| 422 | if (remainder == 0 || sent != len) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 423 | goto out; |
| 424 | base = 0; |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 425 | } else |
| 426 | base -= xdr->page_len; |
| 427 | |
| 428 | if (base >= xdr->tail[0].iov_len) |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 429 | return 0; |
Trond Myklebust | 24c5684 | 2006-10-17 15:06:22 -0400 | [diff] [blame] | 430 | err = xs_send_kvec(sock, NULL, 0, &xdr->tail[0], base, 0); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 431 | out: |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 432 | if (err > 0) { |
| 433 | *sent_p += err; |
| 434 | err = 0; |
| 435 | } |
| 436 | return err; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 437 | } |
| 438 | |
Trond Myklebust | b6ddf64 | 2008-04-17 18:52:19 -0400 | [diff] [blame] | 439 | static void xs_nospace_callback(struct rpc_task *task) |
| 440 | { |
| 441 | struct sock_xprt *transport = container_of(task->tk_rqstp->rq_xprt, struct sock_xprt, xprt); |
| 442 | |
| 443 | transport->inet->sk_write_pending--; |
Trond Myklebust | b6ddf64 | 2008-04-17 18:52:19 -0400 | [diff] [blame] | 444 | } |
| 445 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 446 | /** |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 447 | * xs_nospace - place task on wait queue if transmit was incomplete |
| 448 | * @task: task to put to sleep |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 449 | * |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 450 | */ |
Trond Myklebust | 5e3771c | 2009-03-11 14:38:01 -0400 | [diff] [blame] | 451 | static int xs_nospace(struct rpc_task *task) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 452 | { |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 453 | struct rpc_rqst *req = task->tk_rqstp; |
| 454 | struct rpc_xprt *xprt = req->rq_xprt; |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 455 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
Trond Myklebust | 06ea0bf | 2014-02-11 09:15:54 -0500 | [diff] [blame] | 456 | struct sock *sk = transport->inet; |
Trond Myklebust | 24ca9a8 | 2011-11-22 14:44:28 +0200 | [diff] [blame] | 457 | int ret = -EAGAIN; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 458 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 459 | dprintk("RPC: %5u xmit incomplete (%u left of %u)\n", |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 460 | task->tk_pid, req->rq_slen - req->rq_bytes_sent, |
| 461 | req->rq_slen); |
| 462 | |
Trond Myklebust | b6ddf64 | 2008-04-17 18:52:19 -0400 | [diff] [blame] | 463 | /* Protect against races with write_space */ |
| 464 | spin_lock_bh(&xprt->transport_lock); |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 465 | |
Trond Myklebust | b6ddf64 | 2008-04-17 18:52:19 -0400 | [diff] [blame] | 466 | /* Don't race with disconnect */ |
| 467 | if (xprt_connected(xprt)) { |
Trond Myklebust | 13331a5 | 2016-01-06 08:57:06 -0500 | [diff] [blame] | 468 | /* wait for more buffer space */ |
| 469 | sk->sk_write_pending++; |
| 470 | xprt_wait_for_buffer_space(task, xs_nospace_callback); |
| 471 | } else |
Trond Myklebust | 5e3771c | 2009-03-11 14:38:01 -0400 | [diff] [blame] | 472 | ret = -ENOTCONN; |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 473 | |
Trond Myklebust | b6ddf64 | 2008-04-17 18:52:19 -0400 | [diff] [blame] | 474 | spin_unlock_bh(&xprt->transport_lock); |
Trond Myklebust | 06ea0bf | 2014-02-11 09:15:54 -0500 | [diff] [blame] | 475 | |
| 476 | /* Race breaker in case memory is freed before above code is called */ |
| 477 | sk->sk_write_space(sk); |
Trond Myklebust | 5e3771c | 2009-03-11 14:38:01 -0400 | [diff] [blame] | 478 | return ret; |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 479 | } |
| 480 | |
Chuck Lever | 61677ee | 2011-05-09 15:22:34 -0400 | [diff] [blame] | 481 | /* |
| 482 | * Construct a stream transport record marker in @buf. |
| 483 | */ |
| 484 | static inline void xs_encode_stream_record_marker(struct xdr_buf *buf) |
| 485 | { |
| 486 | u32 reclen = buf->len - sizeof(rpc_fraghdr); |
| 487 | rpc_fraghdr *base = buf->head[0].iov_base; |
| 488 | *base = cpu_to_be32(RPC_LAST_STREAM_FRAGMENT | reclen); |
| 489 | } |
| 490 | |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 491 | /** |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 492 | * xs_local_send_request - write an RPC request to an AF_LOCAL socket |
| 493 | * @task: RPC task that manages the state of an RPC request |
| 494 | * |
| 495 | * Return values: |
| 496 | * 0: The request has been sent |
| 497 | * EAGAIN: The socket was blocked, please call again later to |
| 498 | * complete the request |
| 499 | * ENOTCONN: Caller needs to invoke connect logic then call again |
| 500 | * other: Some other error occured, the request was not sent |
| 501 | */ |
| 502 | static int xs_local_send_request(struct rpc_task *task) |
| 503 | { |
| 504 | struct rpc_rqst *req = task->tk_rqstp; |
| 505 | struct rpc_xprt *xprt = req->rq_xprt; |
| 506 | struct sock_xprt *transport = |
| 507 | container_of(xprt, struct sock_xprt, xprt); |
| 508 | struct xdr_buf *xdr = &req->rq_snd_buf; |
| 509 | int status; |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 510 | int sent = 0; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 511 | |
| 512 | xs_encode_stream_record_marker(&req->rq_snd_buf); |
| 513 | |
| 514 | xs_pktdump("packet data:", |
| 515 | req->rq_svec->iov_base, req->rq_svec->iov_len); |
| 516 | |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 517 | status = xs_sendpages(transport->sock, NULL, 0, xdr, req->rq_bytes_sent, |
| 518 | true, &sent); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 519 | dprintk("RPC: %s(%u) = %d\n", |
| 520 | __func__, xdr->len - req->rq_bytes_sent, status); |
NeilBrown | 743c69e | 2015-07-27 10:55:35 +1000 | [diff] [blame] | 521 | |
| 522 | if (status == -EAGAIN && sock_writeable(transport->inet)) |
| 523 | status = -ENOBUFS; |
| 524 | |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 525 | if (likely(sent > 0) || status == 0) { |
| 526 | req->rq_bytes_sent += sent; |
| 527 | req->rq_xmit_bytes_sent += sent; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 528 | if (likely(req->rq_bytes_sent >= req->rq_slen)) { |
| 529 | req->rq_bytes_sent = 0; |
| 530 | return 0; |
| 531 | } |
| 532 | status = -EAGAIN; |
| 533 | } |
| 534 | |
| 535 | switch (status) { |
Trond Myklebust | 3601c4a | 2014-06-30 13:42:19 -0400 | [diff] [blame] | 536 | case -ENOBUFS: |
Trond Myklebust | b5872f0 | 2015-07-03 09:32:23 -0400 | [diff] [blame] | 537 | break; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 538 | case -EAGAIN: |
| 539 | status = xs_nospace(task); |
| 540 | break; |
| 541 | default: |
| 542 | dprintk("RPC: sendmsg returned unrecognized error %d\n", |
| 543 | -status); |
| 544 | case -EPIPE: |
| 545 | xs_close(xprt); |
| 546 | status = -ENOTCONN; |
| 547 | } |
| 548 | |
| 549 | return status; |
| 550 | } |
| 551 | |
| 552 | /** |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 553 | * xs_udp_send_request - write an RPC request to a UDP socket |
| 554 | * @task: address of RPC task that manages the state of an RPC request |
| 555 | * |
| 556 | * Return values: |
| 557 | * 0: The request has been sent |
| 558 | * EAGAIN: The socket was blocked, please call again later to |
| 559 | * complete the request |
| 560 | * ENOTCONN: Caller needs to invoke connect logic then call again |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 561 | * other: Some other error occurred, the request was not sent |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 562 | */ |
| 563 | static int xs_udp_send_request(struct rpc_task *task) |
| 564 | { |
| 565 | struct rpc_rqst *req = task->tk_rqstp; |
| 566 | struct rpc_xprt *xprt = req->rq_xprt; |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 567 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 568 | struct xdr_buf *xdr = &req->rq_snd_buf; |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 569 | int sent = 0; |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 570 | int status; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 571 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 572 | xs_pktdump("packet data:", |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 573 | req->rq_svec->iov_base, |
| 574 | req->rq_svec->iov_len); |
| 575 | |
Trond Myklebust | 01d37c4 | 2009-03-11 14:09:39 -0400 | [diff] [blame] | 576 | if (!xprt_bound(xprt)) |
| 577 | return -ENOTCONN; |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 578 | status = xs_sendpages(transport->sock, xs_addr(xprt), xprt->addrlen, |
| 579 | xdr, req->rq_bytes_sent, true, &sent); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 580 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 581 | dprintk("RPC: xs_udp_send_request(%u) = %d\n", |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 582 | xdr->len - req->rq_bytes_sent, status); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 583 | |
Jason Baron | 3dedbb5 | 2014-09-24 18:08:04 +0000 | [diff] [blame] | 584 | /* firewall is blocking us, don't return -EAGAIN or we end up looping */ |
| 585 | if (status == -EPERM) |
| 586 | goto process_status; |
| 587 | |
NeilBrown | 743c69e | 2015-07-27 10:55:35 +1000 | [diff] [blame] | 588 | if (status == -EAGAIN && sock_writeable(transport->inet)) |
| 589 | status = -ENOBUFS; |
| 590 | |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 591 | if (sent > 0 || status == 0) { |
| 592 | req->rq_xmit_bytes_sent += sent; |
| 593 | if (sent >= req->rq_slen) |
Trond Myklebust | 2199700 | 2007-10-01 11:43:37 -0400 | [diff] [blame] | 594 | return 0; |
| 595 | /* Still some bytes left; set up for a retry later. */ |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 596 | status = -EAGAIN; |
Trond Myklebust | 2199700 | 2007-10-01 11:43:37 -0400 | [diff] [blame] | 597 | } |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 598 | |
Jason Baron | 3dedbb5 | 2014-09-24 18:08:04 +0000 | [diff] [blame] | 599 | process_status: |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 600 | switch (status) { |
Trond Myklebust | fba91af | 2009-03-11 14:06:41 -0400 | [diff] [blame] | 601 | case -ENOTSOCK: |
| 602 | status = -ENOTCONN; |
| 603 | /* Should we call xs_close() here? */ |
| 604 | break; |
Trond Myklebust | b6ddf64 | 2008-04-17 18:52:19 -0400 | [diff] [blame] | 605 | case -EAGAIN: |
Trond Myklebust | 5e3771c | 2009-03-11 14:38:01 -0400 | [diff] [blame] | 606 | status = xs_nospace(task); |
Trond Myklebust | b6ddf64 | 2008-04-17 18:52:19 -0400 | [diff] [blame] | 607 | break; |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 608 | case -ENETUNREACH: |
Trond Myklebust | 3601c4a | 2014-06-30 13:42:19 -0400 | [diff] [blame] | 609 | case -ENOBUFS: |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 610 | case -EPIPE: |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 611 | case -ECONNREFUSED: |
Jason Baron | 3dedbb5 | 2014-09-24 18:08:04 +0000 | [diff] [blame] | 612 | case -EPERM: |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 613 | /* When the server has died, an ICMP port unreachable message |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 614 | * prompts ECONNREFUSED. */ |
Trond Myklebust | 13331a5 | 2016-01-06 08:57:06 -0500 | [diff] [blame] | 615 | break; |
| 616 | default: |
| 617 | dprintk("RPC: sendmsg returned unrecognized error %d\n", |
| 618 | -status); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 619 | } |
Bian Naimeng | 5fe46e9 | 2010-03-08 14:49:01 +0800 | [diff] [blame] | 620 | |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 621 | return status; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 622 | } |
| 623 | |
Trond Myklebust | e06799f | 2007-11-05 15:44:12 -0500 | [diff] [blame] | 624 | /** |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 625 | * xs_tcp_send_request - write an RPC request to a TCP socket |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 626 | * @task: address of RPC task that manages the state of an RPC request |
| 627 | * |
| 628 | * Return values: |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 629 | * 0: The request has been sent |
| 630 | * EAGAIN: The socket was blocked, please call again later to |
| 631 | * complete the request |
| 632 | * ENOTCONN: Caller needs to invoke connect logic then call again |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 633 | * other: Some other error occurred, the request was not sent |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 634 | * |
| 635 | * XXX: In the case of soft timeouts, should we eventually give up |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 636 | * if sendmsg is not able to make progress? |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 637 | */ |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 638 | static int xs_tcp_send_request(struct rpc_task *task) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 639 | { |
| 640 | struct rpc_rqst *req = task->tk_rqstp; |
| 641 | struct rpc_xprt *xprt = req->rq_xprt; |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 642 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 643 | struct xdr_buf *xdr = &req->rq_snd_buf; |
Trond Myklebust | a6b31d1 | 2013-11-08 16:03:50 -0500 | [diff] [blame] | 644 | bool zerocopy = true; |
Chuck Lever | b595bb1 | 2007-08-06 11:56:42 -0400 | [diff] [blame] | 645 | int status; |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 646 | int sent; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 647 | |
Chuck Lever | 61677ee | 2011-05-09 15:22:34 -0400 | [diff] [blame] | 648 | xs_encode_stream_record_marker(&req->rq_snd_buf); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 649 | |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 650 | xs_pktdump("packet data:", |
| 651 | req->rq_svec->iov_base, |
| 652 | req->rq_svec->iov_len); |
Trond Myklebust | a6b31d1 | 2013-11-08 16:03:50 -0500 | [diff] [blame] | 653 | /* Don't use zero copy if this is a resend. If the RPC call |
| 654 | * completes while the socket holds a reference to the pages, |
| 655 | * then we may end up resending corrupted data. |
| 656 | */ |
| 657 | if (task->tk_flags & RPC_TASK_SENT) |
| 658 | zerocopy = false; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 659 | |
| 660 | /* Continue transmitting the packet/record. We must be careful |
| 661 | * to cope with writespace callbacks arriving _after_ we have |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 662 | * called sendmsg(). */ |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 663 | while (1) { |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 664 | sent = 0; |
| 665 | status = xs_sendpages(transport->sock, NULL, 0, xdr, |
| 666 | req->rq_bytes_sent, zerocopy, &sent); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 667 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 668 | dprintk("RPC: xs_tcp_send_request(%u) = %d\n", |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 669 | xdr->len - req->rq_bytes_sent, status); |
| 670 | |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 671 | /* If we've sent the entire packet, immediately |
| 672 | * reset the count of bytes sent. */ |
Jason Baron | f279cd0 | 2014-09-24 18:08:00 +0000 | [diff] [blame] | 673 | req->rq_bytes_sent += sent; |
| 674 | req->rq_xmit_bytes_sent += sent; |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 675 | if (likely(req->rq_bytes_sent >= req->rq_slen)) { |
| 676 | req->rq_bytes_sent = 0; |
| 677 | return 0; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 678 | } |
| 679 | |
Trond Myklebust | f580dd0 | 2015-07-11 17:48:52 +0200 | [diff] [blame] | 680 | if (status < 0) |
| 681 | break; |
| 682 | if (sent == 0) { |
| 683 | status = -EAGAIN; |
| 684 | break; |
| 685 | } |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 686 | } |
NeilBrown | 743c69e | 2015-07-27 10:55:35 +1000 | [diff] [blame] | 687 | if (status == -EAGAIN && sk_stream_is_writeable(transport->inet)) |
| 688 | status = -ENOBUFS; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 689 | |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 690 | switch (status) { |
Trond Myklebust | fba91af | 2009-03-11 14:06:41 -0400 | [diff] [blame] | 691 | case -ENOTSOCK: |
| 692 | status = -ENOTCONN; |
| 693 | /* Should we call xs_close() here? */ |
| 694 | break; |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 695 | case -EAGAIN: |
Trond Myklebust | 5e3771c | 2009-03-11 14:38:01 -0400 | [diff] [blame] | 696 | status = xs_nospace(task); |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 697 | break; |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 698 | case -ECONNRESET: |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 699 | case -ECONNREFUSED: |
| 700 | case -ENOTCONN: |
Trond Myklebust | 3913c78 | 2015-02-08 21:44:04 -0500 | [diff] [blame] | 701 | case -EADDRINUSE: |
Trond Myklebust | b5872f0 | 2015-07-03 09:32:23 -0400 | [diff] [blame] | 702 | case -ENOBUFS: |
Trond Myklebust | b9d2bb2 | 2012-10-23 11:40:02 -0400 | [diff] [blame] | 703 | case -EPIPE: |
Trond Myklebust | 13331a5 | 2016-01-06 08:57:06 -0500 | [diff] [blame] | 704 | break; |
| 705 | default: |
| 706 | dprintk("RPC: sendmsg returned unrecognized error %d\n", |
| 707 | -status); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 708 | } |
Bian Naimeng | 5fe46e9 | 2010-03-08 14:49:01 +0800 | [diff] [blame] | 709 | |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 710 | return status; |
| 711 | } |
| 712 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 713 | /** |
Trond Myklebust | e0ab53d | 2006-07-27 17:22:50 -0400 | [diff] [blame] | 714 | * xs_tcp_release_xprt - clean up after a tcp transmission |
| 715 | * @xprt: transport |
| 716 | * @task: rpc task |
| 717 | * |
| 718 | * This cleans up if an error causes us to abort the transmission of a request. |
| 719 | * In this case, the socket may need to be reset in order to avoid confusing |
| 720 | * the server. |
| 721 | */ |
| 722 | static void xs_tcp_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task) |
| 723 | { |
| 724 | struct rpc_rqst *req; |
| 725 | |
| 726 | if (task != xprt->snd_task) |
| 727 | return; |
| 728 | if (task == NULL) |
| 729 | goto out_release; |
| 730 | req = task->tk_rqstp; |
Trond Myklebust | 43cedbf0e | 2011-07-17 16:01:03 -0400 | [diff] [blame] | 731 | if (req == NULL) |
| 732 | goto out_release; |
Trond Myklebust | e0ab53d | 2006-07-27 17:22:50 -0400 | [diff] [blame] | 733 | if (req->rq_bytes_sent == 0) |
| 734 | goto out_release; |
| 735 | if (req->rq_bytes_sent == req->rq_snd_buf.len) |
| 736 | goto out_release; |
Trond Myklebust | a4f0835 | 2013-01-08 09:10:21 -0500 | [diff] [blame] | 737 | set_bit(XPRT_CLOSE_WAIT, &xprt->state); |
Trond Myklebust | e0ab53d | 2006-07-27 17:22:50 -0400 | [diff] [blame] | 738 | out_release: |
| 739 | xprt_release_xprt(xprt, task); |
| 740 | } |
| 741 | |
Trond Myklebust | 2a9e1cf | 2008-10-28 15:21:39 -0400 | [diff] [blame] | 742 | static void xs_save_old_callbacks(struct sock_xprt *transport, struct sock *sk) |
| 743 | { |
| 744 | transport->old_data_ready = sk->sk_data_ready; |
| 745 | transport->old_state_change = sk->sk_state_change; |
| 746 | transport->old_write_space = sk->sk_write_space; |
Trond Myklebust | 2118071 | 2013-12-31 13:22:59 -0500 | [diff] [blame] | 747 | transport->old_error_report = sk->sk_error_report; |
Trond Myklebust | 2a9e1cf | 2008-10-28 15:21:39 -0400 | [diff] [blame] | 748 | } |
| 749 | |
| 750 | static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *sk) |
| 751 | { |
| 752 | sk->sk_data_ready = transport->old_data_ready; |
| 753 | sk->sk_state_change = transport->old_state_change; |
| 754 | sk->sk_write_space = transport->old_write_space; |
Trond Myklebust | 2118071 | 2013-12-31 13:22:59 -0500 | [diff] [blame] | 755 | sk->sk_error_report = transport->old_error_report; |
| 756 | } |
| 757 | |
Trond Myklebust | b70ae91 | 2015-02-09 09:41:32 -0500 | [diff] [blame] | 758 | static void xs_sock_reset_connection_flags(struct rpc_xprt *xprt) |
| 759 | { |
| 760 | smp_mb__before_atomic(); |
| 761 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); |
| 762 | clear_bit(XPRT_CLOSING, &xprt->state); |
| 763 | smp_mb__after_atomic(); |
| 764 | } |
| 765 | |
| 766 | static void xs_sock_mark_closed(struct rpc_xprt *xprt) |
| 767 | { |
| 768 | xs_sock_reset_connection_flags(xprt); |
| 769 | /* Mark transport as closed and wake up all pending tasks */ |
| 770 | xprt_disconnect_done(xprt); |
| 771 | } |
| 772 | |
Trond Myklebust | 2118071 | 2013-12-31 13:22:59 -0500 | [diff] [blame] | 773 | /** |
| 774 | * xs_error_report - callback to handle TCP socket state errors |
| 775 | * @sk: socket |
| 776 | * |
| 777 | * Note: we don't call sock_error() since there may be a rpc_task |
| 778 | * using the socket, and so we don't want to clear sk->sk_err. |
| 779 | */ |
| 780 | static void xs_error_report(struct sock *sk) |
| 781 | { |
| 782 | struct rpc_xprt *xprt; |
| 783 | int err; |
| 784 | |
| 785 | read_lock_bh(&sk->sk_callback_lock); |
| 786 | if (!(xprt = xprt_from_sock(sk))) |
| 787 | goto out; |
| 788 | |
| 789 | err = -sk->sk_err; |
| 790 | if (err == 0) |
| 791 | goto out; |
Trond Myklebust | b70ae91 | 2015-02-09 09:41:32 -0500 | [diff] [blame] | 792 | /* Is this a reset event? */ |
| 793 | if (sk->sk_state == TCP_CLOSE) |
| 794 | xs_sock_mark_closed(xprt); |
Trond Myklebust | 2118071 | 2013-12-31 13:22:59 -0500 | [diff] [blame] | 795 | dprintk("RPC: xs_error_report client %p, error=%d...\n", |
| 796 | xprt, -err); |
Trond Myklebust | e8353c76 | 2013-12-31 13:39:22 -0500 | [diff] [blame] | 797 | trace_rpc_socket_error(xprt, sk->sk_socket, err); |
Trond Myklebust | 2118071 | 2013-12-31 13:22:59 -0500 | [diff] [blame] | 798 | xprt_wake_pending_tasks(xprt, err); |
| 799 | out: |
| 800 | read_unlock_bh(&sk->sk_callback_lock); |
Trond Myklebust | 2a9e1cf | 2008-10-28 15:21:39 -0400 | [diff] [blame] | 801 | } |
| 802 | |
Chuck Lever | fe315e7 | 2009-03-11 14:10:21 -0400 | [diff] [blame] | 803 | static void xs_reset_transport(struct sock_xprt *transport) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 804 | { |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 805 | struct socket *sock = transport->sock; |
| 806 | struct sock *sk = transport->inet; |
Trond Myklebust | 6cc7e90 | 2015-02-08 18:35:25 -0500 | [diff] [blame] | 807 | struct rpc_xprt *xprt = &transport->xprt; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 808 | |
Chuck Lever | fe315e7 | 2009-03-11 14:10:21 -0400 | [diff] [blame] | 809 | if (sk == NULL) |
| 810 | return; |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 811 | |
Jeff Layton | 264d1df | 2015-06-03 16:14:27 -0400 | [diff] [blame] | 812 | if (atomic_read(&transport->xprt.swapper)) |
| 813 | sk_clear_memalloc(sk); |
| 814 | |
Trond Myklebust | 0993920 | 2015-08-29 19:11:21 -0700 | [diff] [blame] | 815 | kernel_sock_shutdown(sock, SHUT_RDWR); |
| 816 | |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 817 | mutex_lock(&transport->recv_mutex); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 818 | write_lock_bh(&sk->sk_callback_lock); |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 819 | transport->inet = NULL; |
| 820 | transport->sock = NULL; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 821 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 822 | sk->sk_user_data = NULL; |
Trond Myklebust | 2a9e1cf | 2008-10-28 15:21:39 -0400 | [diff] [blame] | 823 | |
| 824 | xs_restore_old_callbacks(transport, sk); |
Trond Myklebust | 0c78789 | 2015-08-29 13:36:30 -0700 | [diff] [blame] | 825 | xprt_clear_connected(xprt); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 826 | write_unlock_bh(&sk->sk_callback_lock); |
Trond Myklebust | 6cc7e90 | 2015-02-08 18:35:25 -0500 | [diff] [blame] | 827 | xs_sock_reset_connection_flags(xprt); |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 828 | mutex_unlock(&transport->recv_mutex); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 829 | |
Trond Myklebust | 6cc7e90 | 2015-02-08 18:35:25 -0500 | [diff] [blame] | 830 | trace_rpc_socket_close(xprt, sock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 831 | sock_release(sock); |
Chuck Lever | fe315e7 | 2009-03-11 14:10:21 -0400 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | /** |
| 835 | * xs_close - close a socket |
| 836 | * @xprt: transport |
| 837 | * |
| 838 | * This is used when all requests are complete; ie, no DRC state remains |
| 839 | * on the server we want to save. |
Trond Myklebust | f75e674 | 2009-04-21 17:18:20 -0400 | [diff] [blame] | 840 | * |
| 841 | * The caller _must_ be holding XPRT_LOCKED in order to avoid issues with |
| 842 | * xs_reset_transport() zeroing the socket from underneath a writer. |
Chuck Lever | fe315e7 | 2009-03-11 14:10:21 -0400 | [diff] [blame] | 843 | */ |
| 844 | static void xs_close(struct rpc_xprt *xprt) |
| 845 | { |
| 846 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
| 847 | |
| 848 | dprintk("RPC: xs_close xprt %p\n", xprt); |
| 849 | |
| 850 | xs_reset_transport(transport); |
Neil Brown | 61d0a8e | 2009-09-23 14:36:37 -0400 | [diff] [blame] | 851 | xprt->reestablish_timeout = 0; |
Chuck Lever | fe315e7 | 2009-03-11 14:10:21 -0400 | [diff] [blame] | 852 | |
Trond Myklebust | 62da3b2 | 2007-11-06 18:44:20 -0500 | [diff] [blame] | 853 | xprt_disconnect_done(xprt); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 854 | } |
| 855 | |
Chuck Lever | 4a06825 | 2015-05-11 14:02:25 -0400 | [diff] [blame] | 856 | static void xs_inject_disconnect(struct rpc_xprt *xprt) |
| 857 | { |
| 858 | dprintk("RPC: injecting transport disconnect on xprt=%p\n", |
| 859 | xprt); |
| 860 | xprt_disconnect_done(xprt); |
| 861 | } |
| 862 | |
Kinglong Mee | 315f381 | 2014-03-24 11:07:22 +0800 | [diff] [blame] | 863 | static void xs_xprt_free(struct rpc_xprt *xprt) |
| 864 | { |
| 865 | xs_free_peer_addresses(xprt); |
| 866 | xprt_free(xprt); |
| 867 | } |
| 868 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 869 | /** |
| 870 | * xs_destroy - prepare to shutdown a transport |
| 871 | * @xprt: doomed transport |
| 872 | * |
| 873 | */ |
| 874 | static void xs_destroy(struct rpc_xprt *xprt) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 875 | { |
Trond Myklebust | 03c78827 | 2015-09-17 10:42:27 -0400 | [diff] [blame] | 876 | struct sock_xprt *transport = container_of(xprt, |
| 877 | struct sock_xprt, xprt); |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 878 | dprintk("RPC: xs_destroy xprt %p\n", xprt); |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 879 | |
Trond Myklebust | 03c78827 | 2015-09-17 10:42:27 -0400 | [diff] [blame] | 880 | cancel_delayed_work_sync(&transport->connect_worker); |
Trond Myklebust | a1311d8 | 2013-10-31 09:18:49 -0400 | [diff] [blame] | 881 | xs_close(xprt); |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 882 | cancel_work_sync(&transport->recv_worker); |
Kinglong Mee | 315f381 | 2014-03-24 11:07:22 +0800 | [diff] [blame] | 883 | xs_xprt_free(xprt); |
Trond Myklebust | a1311d8 | 2013-10-31 09:18:49 -0400 | [diff] [blame] | 884 | module_put(THIS_MODULE); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 885 | } |
| 886 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 887 | static int xs_local_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb) |
| 888 | { |
| 889 | struct xdr_skb_reader desc = { |
| 890 | .skb = skb, |
| 891 | .offset = sizeof(rpc_fraghdr), |
| 892 | .count = skb->len - sizeof(rpc_fraghdr), |
| 893 | }; |
| 894 | |
| 895 | if (xdr_partial_copy_from_skb(xdr, 0, &desc, xdr_skb_read_bits) < 0) |
| 896 | return -1; |
| 897 | if (desc.count) |
| 898 | return -1; |
| 899 | return 0; |
| 900 | } |
| 901 | |
| 902 | /** |
Trond Myklebust | a264809 | 2015-10-06 17:03:00 -0400 | [diff] [blame] | 903 | * xs_local_data_read_skb |
| 904 | * @xprt: transport |
| 905 | * @sk: socket |
| 906 | * @skb: skbuff |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 907 | * |
| 908 | * Currently this assumes we can read the whole reply in a single gulp. |
| 909 | */ |
Trond Myklebust | a264809 | 2015-10-06 17:03:00 -0400 | [diff] [blame] | 910 | static void xs_local_data_read_skb(struct rpc_xprt *xprt, |
| 911 | struct sock *sk, |
| 912 | struct sk_buff *skb) |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 913 | { |
| 914 | struct rpc_task *task; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 915 | struct rpc_rqst *rovr; |
Trond Myklebust | a264809 | 2015-10-06 17:03:00 -0400 | [diff] [blame] | 916 | int repsize, copied; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 917 | u32 _xid; |
| 918 | __be32 *xp; |
| 919 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 920 | repsize = skb->len - sizeof(rpc_fraghdr); |
| 921 | if (repsize < 4) { |
| 922 | dprintk("RPC: impossible RPC reply size %d\n", repsize); |
Trond Myklebust | a264809 | 2015-10-06 17:03:00 -0400 | [diff] [blame] | 923 | return; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 924 | } |
| 925 | |
| 926 | /* Copy the XID from the skb... */ |
| 927 | xp = skb_header_pointer(skb, sizeof(rpc_fraghdr), sizeof(_xid), &_xid); |
| 928 | if (xp == NULL) |
Trond Myklebust | a264809 | 2015-10-06 17:03:00 -0400 | [diff] [blame] | 929 | return; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 930 | |
| 931 | /* Look up and lock the request corresponding to the given XID */ |
Trond Myklebust | a264809 | 2015-10-06 17:03:00 -0400 | [diff] [blame] | 932 | spin_lock_bh(&xprt->transport_lock); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 933 | rovr = xprt_lookup_rqst(xprt, *xp); |
| 934 | if (!rovr) |
| 935 | goto out_unlock; |
| 936 | task = rovr->rq_task; |
| 937 | |
| 938 | copied = rovr->rq_private_buf.buflen; |
| 939 | if (copied > repsize) |
| 940 | copied = repsize; |
| 941 | |
| 942 | if (xs_local_copy_to_xdr(&rovr->rq_private_buf, skb)) { |
| 943 | dprintk("RPC: sk_buff copy failed\n"); |
| 944 | goto out_unlock; |
| 945 | } |
| 946 | |
| 947 | xprt_complete_rqst(task, copied); |
| 948 | |
| 949 | out_unlock: |
Trond Myklebust | a264809 | 2015-10-06 17:03:00 -0400 | [diff] [blame] | 950 | spin_unlock_bh(&xprt->transport_lock); |
| 951 | } |
| 952 | |
| 953 | static void xs_local_data_receive(struct sock_xprt *transport) |
| 954 | { |
| 955 | struct sk_buff *skb; |
| 956 | struct sock *sk; |
| 957 | int err; |
| 958 | |
| 959 | mutex_lock(&transport->recv_mutex); |
| 960 | sk = transport->inet; |
| 961 | if (sk == NULL) |
| 962 | goto out; |
| 963 | for (;;) { |
| 964 | skb = skb_recv_datagram(sk, 0, 1, &err); |
| 965 | if (skb == NULL) |
| 966 | break; |
| 967 | xs_local_data_read_skb(&transport->xprt, sk, skb); |
| 968 | skb_free_datagram(sk, skb); |
| 969 | } |
| 970 | out: |
| 971 | mutex_unlock(&transport->recv_mutex); |
| 972 | } |
| 973 | |
| 974 | static void xs_local_data_receive_workfn(struct work_struct *work) |
| 975 | { |
| 976 | struct sock_xprt *transport = |
| 977 | container_of(work, struct sock_xprt, recv_worker); |
| 978 | xs_local_data_receive(transport); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 979 | } |
| 980 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 981 | /** |
Trond Myklebust | f9b2ee7 | 2015-10-06 16:26:05 -0400 | [diff] [blame] | 982 | * xs_udp_data_read_skb - receive callback for UDP sockets |
| 983 | * @xprt: transport |
| 984 | * @sk: socket |
| 985 | * @skb: skbuff |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 986 | * |
| 987 | */ |
Trond Myklebust | f9b2ee7 | 2015-10-06 16:26:05 -0400 | [diff] [blame] | 988 | static void xs_udp_data_read_skb(struct rpc_xprt *xprt, |
| 989 | struct sock *sk, |
| 990 | struct sk_buff *skb) |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 991 | { |
| 992 | struct rpc_task *task; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 993 | struct rpc_rqst *rovr; |
Trond Myklebust | f9b2ee7 | 2015-10-06 16:26:05 -0400 | [diff] [blame] | 994 | int repsize, copied; |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 995 | u32 _xid; |
| 996 | __be32 *xp; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 997 | |
Willem de Bruijn | 1da8c681 | 2016-04-07 11:44:58 -0400 | [diff] [blame] | 998 | repsize = skb->len; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 999 | if (repsize < 4) { |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1000 | dprintk("RPC: impossible RPC reply size %d!\n", repsize); |
Trond Myklebust | f9b2ee7 | 2015-10-06 16:26:05 -0400 | [diff] [blame] | 1001 | return; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | /* Copy the XID from the skb... */ |
Willem de Bruijn | 1da8c681 | 2016-04-07 11:44:58 -0400 | [diff] [blame] | 1005 | xp = skb_header_pointer(skb, 0, sizeof(_xid), &_xid); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1006 | if (xp == NULL) |
Trond Myklebust | f9b2ee7 | 2015-10-06 16:26:05 -0400 | [diff] [blame] | 1007 | return; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1008 | |
| 1009 | /* Look up and lock the request corresponding to the given XID */ |
Trond Myklebust | f9b2ee7 | 2015-10-06 16:26:05 -0400 | [diff] [blame] | 1010 | spin_lock_bh(&xprt->transport_lock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1011 | rovr = xprt_lookup_rqst(xprt, *xp); |
| 1012 | if (!rovr) |
| 1013 | goto out_unlock; |
| 1014 | task = rovr->rq_task; |
| 1015 | |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1016 | if ((copied = rovr->rq_private_buf.buflen) > repsize) |
| 1017 | copied = repsize; |
| 1018 | |
| 1019 | /* Suck it into the iovec, verify checksum if not done by hw. */ |
Herbert Xu | 1781f7f | 2007-12-11 11:30:32 -0800 | [diff] [blame] | 1020 | if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) { |
Eric Dumazet | 02c2234 | 2016-04-27 16:44:30 -0700 | [diff] [blame] | 1021 | __UDPX_INC_STATS(sk, UDP_MIB_INERRORS); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1022 | goto out_unlock; |
Herbert Xu | 1781f7f | 2007-12-11 11:30:32 -0800 | [diff] [blame] | 1023 | } |
| 1024 | |
Eric Dumazet | 02c2234 | 2016-04-27 16:44:30 -0700 | [diff] [blame] | 1025 | __UDPX_INC_STATS(sk, UDP_MIB_INDATAGRAMS); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1026 | |
Trond Myklebust | 6a24dfb | 2013-01-08 09:48:15 -0500 | [diff] [blame] | 1027 | xprt_adjust_cwnd(xprt, task, copied); |
Chuck Lever | 1570c1e | 2005-08-25 16:25:52 -0700 | [diff] [blame] | 1028 | xprt_complete_rqst(task, copied); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1029 | |
| 1030 | out_unlock: |
Trond Myklebust | f9b2ee7 | 2015-10-06 16:26:05 -0400 | [diff] [blame] | 1031 | spin_unlock_bh(&xprt->transport_lock); |
| 1032 | } |
| 1033 | |
| 1034 | static void xs_udp_data_receive(struct sock_xprt *transport) |
| 1035 | { |
| 1036 | struct sk_buff *skb; |
| 1037 | struct sock *sk; |
| 1038 | int err; |
| 1039 | |
| 1040 | mutex_lock(&transport->recv_mutex); |
| 1041 | sk = transport->inet; |
| 1042 | if (sk == NULL) |
| 1043 | goto out; |
| 1044 | for (;;) { |
| 1045 | skb = skb_recv_datagram(sk, 0, 1, &err); |
| 1046 | if (skb == NULL) |
| 1047 | break; |
| 1048 | xs_udp_data_read_skb(&transport->xprt, sk, skb); |
| 1049 | skb_free_datagram(sk, skb); |
| 1050 | } |
| 1051 | out: |
| 1052 | mutex_unlock(&transport->recv_mutex); |
| 1053 | } |
| 1054 | |
| 1055 | static void xs_udp_data_receive_workfn(struct work_struct *work) |
| 1056 | { |
| 1057 | struct sock_xprt *transport = |
| 1058 | container_of(work, struct sock_xprt, recv_worker); |
| 1059 | xs_udp_data_receive(transport); |
| 1060 | } |
| 1061 | |
| 1062 | /** |
| 1063 | * xs_data_ready - "data ready" callback for UDP sockets |
| 1064 | * @sk: socket with data to read |
| 1065 | * |
| 1066 | */ |
| 1067 | static void xs_data_ready(struct sock *sk) |
| 1068 | { |
| 1069 | struct rpc_xprt *xprt; |
| 1070 | |
| 1071 | read_lock_bh(&sk->sk_callback_lock); |
| 1072 | dprintk("RPC: xs_data_ready...\n"); |
| 1073 | xprt = xprt_from_sock(sk); |
| 1074 | if (xprt != NULL) { |
| 1075 | struct sock_xprt *transport = container_of(xprt, |
| 1076 | struct sock_xprt, xprt); |
| 1077 | queue_work(rpciod_workqueue, &transport->recv_worker); |
| 1078 | } |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1079 | read_unlock_bh(&sk->sk_callback_lock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1080 | } |
| 1081 | |
Trond Myklebust | a519fc7 | 2012-09-12 16:49:15 -0400 | [diff] [blame] | 1082 | /* |
| 1083 | * Helper function to force a TCP close if the server is sending |
| 1084 | * junk and/or it has put us in CLOSE_WAIT |
| 1085 | */ |
| 1086 | static void xs_tcp_force_close(struct rpc_xprt *xprt) |
| 1087 | { |
Trond Myklebust | a519fc7 | 2012-09-12 16:49:15 -0400 | [diff] [blame] | 1088 | xprt_force_disconnect(xprt); |
| 1089 | } |
| 1090 | |
Chuck Lever | dd45647 | 2006-12-05 16:35:44 -0500 | [diff] [blame] | 1091 | static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1092 | { |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1093 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1094 | size_t len, used; |
| 1095 | char *p; |
| 1096 | |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1097 | p = ((char *) &transport->tcp_fraghdr) + transport->tcp_offset; |
| 1098 | len = sizeof(transport->tcp_fraghdr) - transport->tcp_offset; |
Chuck Lever | 9d29231 | 2006-12-05 16:35:41 -0500 | [diff] [blame] | 1099 | used = xdr_skb_read_bits(desc, p, len); |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1100 | transport->tcp_offset += used; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1101 | if (used != len) |
| 1102 | return; |
Chuck Lever | 808012f | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1103 | |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1104 | transport->tcp_reclen = ntohl(transport->tcp_fraghdr); |
| 1105 | if (transport->tcp_reclen & RPC_LAST_STREAM_FRAGMENT) |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1106 | transport->tcp_flags |= TCP_RCV_LAST_FRAG; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1107 | else |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1108 | transport->tcp_flags &= ~TCP_RCV_LAST_FRAG; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1109 | transport->tcp_reclen &= RPC_FRAGMENT_SIZE_MASK; |
Chuck Lever | 808012f | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1110 | |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1111 | transport->tcp_flags &= ~TCP_RCV_COPY_FRAGHDR; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1112 | transport->tcp_offset = 0; |
Chuck Lever | 808012f | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1113 | |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1114 | /* Sanity check of the record length */ |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1115 | if (unlikely(transport->tcp_reclen < 8)) { |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1116 | dprintk("RPC: invalid TCP record fragment length\n"); |
Trond Myklebust | a519fc7 | 2012-09-12 16:49:15 -0400 | [diff] [blame] | 1117 | xs_tcp_force_close(xprt); |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 1118 | return; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1119 | } |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1120 | dprintk("RPC: reading TCP record fragment of length %d\n", |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1121 | transport->tcp_reclen); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1122 | } |
| 1123 | |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1124 | static void xs_tcp_check_fraghdr(struct sock_xprt *transport) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1125 | { |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1126 | if (transport->tcp_offset == transport->tcp_reclen) { |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1127 | transport->tcp_flags |= TCP_RCV_COPY_FRAGHDR; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1128 | transport->tcp_offset = 0; |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1129 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) { |
| 1130 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
| 1131 | transport->tcp_flags |= TCP_RCV_COPY_XID; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1132 | transport->tcp_copied = 0; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1133 | } |
| 1134 | } |
| 1135 | } |
| 1136 | |
Chuck Lever | dd45647 | 2006-12-05 16:35:44 -0500 | [diff] [blame] | 1137 | static inline void xs_tcp_read_xid(struct sock_xprt *transport, struct xdr_skb_reader *desc) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1138 | { |
| 1139 | size_t len, used; |
| 1140 | char *p; |
| 1141 | |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1142 | len = sizeof(transport->tcp_xid) - transport->tcp_offset; |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1143 | dprintk("RPC: reading XID (%Zu bytes)\n", len); |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1144 | p = ((char *) &transport->tcp_xid) + transport->tcp_offset; |
Chuck Lever | 9d29231 | 2006-12-05 16:35:41 -0500 | [diff] [blame] | 1145 | used = xdr_skb_read_bits(desc, p, len); |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1146 | transport->tcp_offset += used; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1147 | if (used != len) |
| 1148 | return; |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1149 | transport->tcp_flags &= ~TCP_RCV_COPY_XID; |
Ricardo Labiaga | f4a2e41 | 2009-04-01 09:22:54 -0400 | [diff] [blame] | 1150 | transport->tcp_flags |= TCP_RCV_READ_CALLDIR; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1151 | transport->tcp_copied = 4; |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1152 | dprintk("RPC: reading %s XID %08x\n", |
| 1153 | (transport->tcp_flags & TCP_RPC_REPLY) ? "reply for" |
| 1154 | : "request with", |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1155 | ntohl(transport->tcp_xid)); |
| 1156 | xs_tcp_check_fraghdr(transport); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1157 | } |
| 1158 | |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1159 | static inline void xs_tcp_read_calldir(struct sock_xprt *transport, |
| 1160 | struct xdr_skb_reader *desc) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1161 | { |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1162 | size_t len, used; |
| 1163 | u32 offset; |
Trond Myklebust | b76ce56 | 2010-06-16 13:57:32 -0400 | [diff] [blame] | 1164 | char *p; |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1165 | |
| 1166 | /* |
| 1167 | * We want transport->tcp_offset to be 8 at the end of this routine |
| 1168 | * (4 bytes for the xid and 4 bytes for the call/reply flag). |
| 1169 | * When this function is called for the first time, |
| 1170 | * transport->tcp_offset is 4 (after having already read the xid). |
| 1171 | */ |
| 1172 | offset = transport->tcp_offset - sizeof(transport->tcp_xid); |
Trond Myklebust | b76ce56 | 2010-06-16 13:57:32 -0400 | [diff] [blame] | 1173 | len = sizeof(transport->tcp_calldir) - offset; |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1174 | dprintk("RPC: reading CALL/REPLY flag (%Zu bytes)\n", len); |
Trond Myklebust | b76ce56 | 2010-06-16 13:57:32 -0400 | [diff] [blame] | 1175 | p = ((char *) &transport->tcp_calldir) + offset; |
| 1176 | used = xdr_skb_read_bits(desc, p, len); |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1177 | transport->tcp_offset += used; |
| 1178 | if (used != len) |
| 1179 | return; |
Ricardo Labiaga | f4a2e41 | 2009-04-01 09:22:54 -0400 | [diff] [blame] | 1180 | transport->tcp_flags &= ~TCP_RCV_READ_CALLDIR; |
Ricardo Labiaga | f4a2e41 | 2009-04-01 09:22:54 -0400 | [diff] [blame] | 1181 | /* |
| 1182 | * We don't yet have the XDR buffer, so we will write the calldir |
| 1183 | * out after we get the buffer from the 'struct rpc_rqst' |
| 1184 | */ |
Trond Myklebust | b76ce56 | 2010-06-16 13:57:32 -0400 | [diff] [blame] | 1185 | switch (ntohl(transport->tcp_calldir)) { |
| 1186 | case RPC_REPLY: |
| 1187 | transport->tcp_flags |= TCP_RCV_COPY_CALLDIR; |
| 1188 | transport->tcp_flags |= TCP_RCV_COPY_DATA; |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1189 | transport->tcp_flags |= TCP_RPC_REPLY; |
Trond Myklebust | b76ce56 | 2010-06-16 13:57:32 -0400 | [diff] [blame] | 1190 | break; |
| 1191 | case RPC_CALL: |
| 1192 | transport->tcp_flags |= TCP_RCV_COPY_CALLDIR; |
| 1193 | transport->tcp_flags |= TCP_RCV_COPY_DATA; |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1194 | transport->tcp_flags &= ~TCP_RPC_REPLY; |
Trond Myklebust | b76ce56 | 2010-06-16 13:57:32 -0400 | [diff] [blame] | 1195 | break; |
| 1196 | default: |
| 1197 | dprintk("RPC: invalid request message type\n"); |
Trond Myklebust | a519fc7 | 2012-09-12 16:49:15 -0400 | [diff] [blame] | 1198 | xs_tcp_force_close(&transport->xprt); |
Trond Myklebust | b76ce56 | 2010-06-16 13:57:32 -0400 | [diff] [blame] | 1199 | } |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1200 | xs_tcp_check_fraghdr(transport); |
| 1201 | } |
| 1202 | |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1203 | static inline void xs_tcp_read_common(struct rpc_xprt *xprt, |
| 1204 | struct xdr_skb_reader *desc, |
| 1205 | struct rpc_rqst *req) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1206 | { |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1207 | struct sock_xprt *transport = |
| 1208 | container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1209 | struct xdr_buf *rcvbuf; |
| 1210 | size_t len; |
| 1211 | ssize_t r; |
| 1212 | |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1213 | rcvbuf = &req->rq_private_buf; |
Ricardo Labiaga | f4a2e41 | 2009-04-01 09:22:54 -0400 | [diff] [blame] | 1214 | |
| 1215 | if (transport->tcp_flags & TCP_RCV_COPY_CALLDIR) { |
| 1216 | /* |
| 1217 | * Save the RPC direction in the XDR buffer |
| 1218 | */ |
Ricardo Labiaga | f4a2e41 | 2009-04-01 09:22:54 -0400 | [diff] [blame] | 1219 | memcpy(rcvbuf->head[0].iov_base + transport->tcp_copied, |
Trond Myklebust | b76ce56 | 2010-06-16 13:57:32 -0400 | [diff] [blame] | 1220 | &transport->tcp_calldir, |
| 1221 | sizeof(transport->tcp_calldir)); |
| 1222 | transport->tcp_copied += sizeof(transport->tcp_calldir); |
Ricardo Labiaga | f4a2e41 | 2009-04-01 09:22:54 -0400 | [diff] [blame] | 1223 | transport->tcp_flags &= ~TCP_RCV_COPY_CALLDIR; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1224 | } |
| 1225 | |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1226 | len = desc->count; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1227 | if (len > transport->tcp_reclen - transport->tcp_offset) { |
Chuck Lever | dd45647 | 2006-12-05 16:35:44 -0500 | [diff] [blame] | 1228 | struct xdr_skb_reader my_desc; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1229 | |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1230 | len = transport->tcp_reclen - transport->tcp_offset; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1231 | memcpy(&my_desc, desc, sizeof(my_desc)); |
| 1232 | my_desc.count = len; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1233 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
Chuck Lever | 9d29231 | 2006-12-05 16:35:41 -0500 | [diff] [blame] | 1234 | &my_desc, xdr_skb_read_bits); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1235 | desc->count -= r; |
| 1236 | desc->offset += r; |
| 1237 | } else |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1238 | r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied, |
Chuck Lever | 9d29231 | 2006-12-05 16:35:41 -0500 | [diff] [blame] | 1239 | desc, xdr_skb_read_bits); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1240 | |
| 1241 | if (r > 0) { |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1242 | transport->tcp_copied += r; |
| 1243 | transport->tcp_offset += r; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1244 | } |
| 1245 | if (r != len) { |
| 1246 | /* Error when copying to the receive buffer, |
| 1247 | * usually because we weren't able to allocate |
| 1248 | * additional buffer pages. All we can do now |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1249 | * is turn off TCP_RCV_COPY_DATA, so the request |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1250 | * will not receive any additional updates, |
| 1251 | * and time out. |
| 1252 | * Any remaining data from this record will |
| 1253 | * be discarded. |
| 1254 | */ |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1255 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1256 | dprintk("RPC: XID %08x truncated request\n", |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1257 | ntohl(transport->tcp_xid)); |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1258 | dprintk("RPC: xprt = %p, tcp_copied = %lu, " |
| 1259 | "tcp_offset = %u, tcp_reclen = %u\n", |
| 1260 | xprt, transport->tcp_copied, |
| 1261 | transport->tcp_offset, transport->tcp_reclen); |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1262 | return; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1263 | } |
| 1264 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1265 | dprintk("RPC: XID %08x read %Zd bytes\n", |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1266 | ntohl(transport->tcp_xid), r); |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1267 | dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, " |
| 1268 | "tcp_reclen = %u\n", xprt, transport->tcp_copied, |
| 1269 | transport->tcp_offset, transport->tcp_reclen); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1270 | |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1271 | if (transport->tcp_copied == req->rq_private_buf.buflen) |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1272 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1273 | else if (transport->tcp_offset == transport->tcp_reclen) { |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1274 | if (transport->tcp_flags & TCP_RCV_LAST_FRAG) |
| 1275 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1276 | } |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1277 | } |
| 1278 | |
| 1279 | /* |
| 1280 | * Finds the request corresponding to the RPC xid and invokes the common |
| 1281 | * tcp read code to read the data. |
| 1282 | */ |
| 1283 | static inline int xs_tcp_read_reply(struct rpc_xprt *xprt, |
| 1284 | struct xdr_skb_reader *desc) |
| 1285 | { |
| 1286 | struct sock_xprt *transport = |
| 1287 | container_of(xprt, struct sock_xprt, xprt); |
| 1288 | struct rpc_rqst *req; |
| 1289 | |
| 1290 | dprintk("RPC: read reply XID %08x\n", ntohl(transport->tcp_xid)); |
| 1291 | |
| 1292 | /* Find and lock the request corresponding to this xid */ |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1293 | spin_lock_bh(&xprt->transport_lock); |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1294 | req = xprt_lookup_rqst(xprt, transport->tcp_xid); |
| 1295 | if (!req) { |
| 1296 | dprintk("RPC: XID %08x request not found!\n", |
| 1297 | ntohl(transport->tcp_xid)); |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1298 | spin_unlock_bh(&xprt->transport_lock); |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1299 | return -1; |
| 1300 | } |
| 1301 | |
| 1302 | xs_tcp_read_common(xprt, desc, req); |
| 1303 | |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1304 | if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1305 | xprt_complete_rqst(req->rq_task, transport->tcp_copied); |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1306 | |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1307 | spin_unlock_bh(&xprt->transport_lock); |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1308 | return 0; |
| 1309 | } |
| 1310 | |
Trond Myklebust | 9e00abc | 2011-07-13 19:20:49 -0400 | [diff] [blame] | 1311 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1312 | /* |
| 1313 | * Obtains an rpc_rqst previously allocated and invokes the common |
| 1314 | * tcp read code to read the data. The result is placed in the callback |
| 1315 | * queue. |
| 1316 | * If we're unable to obtain the rpc_rqst we schedule the closing of the |
| 1317 | * connection and return -1. |
| 1318 | */ |
Trond Myklebust | 2ea2449 | 2014-02-10 11:18:39 -0500 | [diff] [blame] | 1319 | static int xs_tcp_read_callback(struct rpc_xprt *xprt, |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1320 | struct xdr_skb_reader *desc) |
| 1321 | { |
| 1322 | struct sock_xprt *transport = |
| 1323 | container_of(xprt, struct sock_xprt, xprt); |
| 1324 | struct rpc_rqst *req; |
| 1325 | |
Trond Myklebust | 2ea2449 | 2014-02-10 11:18:39 -0500 | [diff] [blame] | 1326 | /* Look up and lock the request corresponding to the given XID */ |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1327 | spin_lock_bh(&xprt->transport_lock); |
Trond Myklebust | 2ea2449 | 2014-02-10 11:18:39 -0500 | [diff] [blame] | 1328 | req = xprt_lookup_bc_request(xprt, transport->tcp_xid); |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1329 | if (req == NULL) { |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1330 | spin_unlock_bh(&xprt->transport_lock); |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1331 | printk(KERN_WARNING "Callback slot table overflowed\n"); |
| 1332 | xprt_force_disconnect(xprt); |
| 1333 | return -1; |
| 1334 | } |
| 1335 | |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1336 | dprintk("RPC: read callback XID %08x\n", ntohl(req->rq_xid)); |
| 1337 | xs_tcp_read_common(xprt, desc, req); |
| 1338 | |
Trond Myklebust | 2ea2449 | 2014-02-10 11:18:39 -0500 | [diff] [blame] | 1339 | if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) |
| 1340 | xprt_complete_bc_request(req, transport->tcp_copied); |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1341 | spin_unlock_bh(&xprt->transport_lock); |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1342 | |
| 1343 | return 0; |
| 1344 | } |
| 1345 | |
| 1346 | static inline int _xs_tcp_read_data(struct rpc_xprt *xprt, |
| 1347 | struct xdr_skb_reader *desc) |
| 1348 | { |
| 1349 | struct sock_xprt *transport = |
| 1350 | container_of(xprt, struct sock_xprt, xprt); |
| 1351 | |
| 1352 | return (transport->tcp_flags & TCP_RPC_REPLY) ? |
| 1353 | xs_tcp_read_reply(xprt, desc) : |
| 1354 | xs_tcp_read_callback(xprt, desc); |
| 1355 | } |
Chuck Lever | 7656677 | 2015-10-24 17:28:32 -0400 | [diff] [blame] | 1356 | |
| 1357 | static int xs_tcp_bc_up(struct svc_serv *serv, struct net *net) |
| 1358 | { |
| 1359 | int ret; |
| 1360 | |
| 1361 | ret = svc_create_xprt(serv, "tcp-bc", net, PF_INET, 0, |
| 1362 | SVC_SOCK_ANONYMOUS); |
| 1363 | if (ret < 0) |
| 1364 | return ret; |
| 1365 | return 0; |
| 1366 | } |
Chuck Lever | 6b26cc8 | 2016-05-02 14:40:40 -0400 | [diff] [blame] | 1367 | |
| 1368 | static size_t xs_tcp_bc_maxpayload(struct rpc_xprt *xprt) |
| 1369 | { |
| 1370 | return PAGE_SIZE; |
| 1371 | } |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1372 | #else |
| 1373 | static inline int _xs_tcp_read_data(struct rpc_xprt *xprt, |
| 1374 | struct xdr_skb_reader *desc) |
| 1375 | { |
| 1376 | return xs_tcp_read_reply(xprt, desc); |
| 1377 | } |
Trond Myklebust | 9e00abc | 2011-07-13 19:20:49 -0400 | [diff] [blame] | 1378 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1379 | |
| 1380 | /* |
| 1381 | * Read data off the transport. This can be either an RPC_CALL or an |
| 1382 | * RPC_REPLY. Relay the processing to helper functions. |
| 1383 | */ |
| 1384 | static void xs_tcp_read_data(struct rpc_xprt *xprt, |
| 1385 | struct xdr_skb_reader *desc) |
| 1386 | { |
| 1387 | struct sock_xprt *transport = |
| 1388 | container_of(xprt, struct sock_xprt, xprt); |
| 1389 | |
| 1390 | if (_xs_tcp_read_data(xprt, desc) == 0) |
| 1391 | xs_tcp_check_fraghdr(transport); |
| 1392 | else { |
| 1393 | /* |
| 1394 | * The transport_lock protects the request handling. |
| 1395 | * There's no need to hold it to update the tcp_flags. |
| 1396 | */ |
| 1397 | transport->tcp_flags &= ~TCP_RCV_COPY_DATA; |
| 1398 | } |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1399 | } |
| 1400 | |
Chuck Lever | dd45647 | 2006-12-05 16:35:44 -0500 | [diff] [blame] | 1401 | static inline void xs_tcp_read_discard(struct sock_xprt *transport, struct xdr_skb_reader *desc) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1402 | { |
| 1403 | size_t len; |
| 1404 | |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1405 | len = transport->tcp_reclen - transport->tcp_offset; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1406 | if (len > desc->count) |
| 1407 | len = desc->count; |
| 1408 | desc->count -= len; |
| 1409 | desc->offset += len; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1410 | transport->tcp_offset += len; |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1411 | dprintk("RPC: discarded %Zu bytes\n", len); |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1412 | xs_tcp_check_fraghdr(transport); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1413 | } |
| 1414 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 1415 | static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, unsigned int offset, size_t len) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1416 | { |
| 1417 | struct rpc_xprt *xprt = rd_desc->arg.data; |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1418 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | dd45647 | 2006-12-05 16:35:44 -0500 | [diff] [blame] | 1419 | struct xdr_skb_reader desc = { |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1420 | .skb = skb, |
| 1421 | .offset = offset, |
| 1422 | .count = len, |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 1423 | }; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1424 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1425 | dprintk("RPC: xs_tcp_data_recv started\n"); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1426 | do { |
Jeff Layton | 1a867a0 | 2014-10-28 14:24:14 -0400 | [diff] [blame] | 1427 | trace_xs_tcp_data_recv(transport); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1428 | /* Read in a new fragment marker if necessary */ |
| 1429 | /* Can we ever really expect to get completely empty fragments? */ |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1430 | if (transport->tcp_flags & TCP_RCV_COPY_FRAGHDR) { |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 1431 | xs_tcp_read_fraghdr(xprt, &desc); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1432 | continue; |
| 1433 | } |
| 1434 | /* Read in the xid if necessary */ |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1435 | if (transport->tcp_flags & TCP_RCV_COPY_XID) { |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1436 | xs_tcp_read_xid(transport, &desc); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1437 | continue; |
| 1438 | } |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1439 | /* Read in the call/reply flag */ |
Ricardo Labiaga | f4a2e41 | 2009-04-01 09:22:54 -0400 | [diff] [blame] | 1440 | if (transport->tcp_flags & TCP_RCV_READ_CALLDIR) { |
Ricardo Labiaga | 18dca02 | 2009-04-01 09:22:53 -0400 | [diff] [blame] | 1441 | xs_tcp_read_calldir(transport, &desc); |
| 1442 | continue; |
| 1443 | } |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1444 | /* Read in the request data */ |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1445 | if (transport->tcp_flags & TCP_RCV_COPY_DATA) { |
Ricardo Labiaga | 44b98ef | 2009-04-01 09:23:02 -0400 | [diff] [blame] | 1446 | xs_tcp_read_data(xprt, &desc); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1447 | continue; |
| 1448 | } |
| 1449 | /* Skip over any trailing bytes on short reads */ |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1450 | xs_tcp_read_discard(transport, &desc); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1451 | } while (desc.count); |
Jeff Layton | 1a867a0 | 2014-10-28 14:24:14 -0400 | [diff] [blame] | 1452 | trace_xs_tcp_data_recv(transport); |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1453 | dprintk("RPC: xs_tcp_data_recv done\n"); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1454 | return len - desc.count; |
| 1455 | } |
| 1456 | |
Trond Myklebust | 66d7a56 | 2015-10-05 11:19:20 -0400 | [diff] [blame] | 1457 | static void xs_tcp_data_receive(struct sock_xprt *transport) |
| 1458 | { |
| 1459 | struct rpc_xprt *xprt = &transport->xprt; |
| 1460 | struct sock *sk; |
| 1461 | read_descriptor_t rd_desc = { |
| 1462 | .count = 2*1024*1024, |
| 1463 | .arg.data = xprt, |
| 1464 | }; |
| 1465 | unsigned long total = 0; |
| 1466 | int read = 0; |
| 1467 | |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1468 | mutex_lock(&transport->recv_mutex); |
Trond Myklebust | 66d7a56 | 2015-10-05 11:19:20 -0400 | [diff] [blame] | 1469 | sk = transport->inet; |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1470 | if (sk == NULL) |
| 1471 | goto out; |
Trond Myklebust | 66d7a56 | 2015-10-05 11:19:20 -0400 | [diff] [blame] | 1472 | |
| 1473 | /* We use rd_desc to pass struct xprt to xs_tcp_data_recv */ |
| 1474 | for (;;) { |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1475 | lock_sock(sk); |
Trond Myklebust | 66d7a56 | 2015-10-05 11:19:20 -0400 | [diff] [blame] | 1476 | read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv); |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1477 | release_sock(sk); |
Trond Myklebust | 66d7a56 | 2015-10-05 11:19:20 -0400 | [diff] [blame] | 1478 | if (read <= 0) |
| 1479 | break; |
| 1480 | total += read; |
| 1481 | rd_desc.count = 65536; |
| 1482 | } |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1483 | out: |
| 1484 | mutex_unlock(&transport->recv_mutex); |
Trond Myklebust | 66d7a56 | 2015-10-05 11:19:20 -0400 | [diff] [blame] | 1485 | trace_xs_tcp_data_ready(xprt, read, total); |
| 1486 | } |
| 1487 | |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1488 | static void xs_tcp_data_receive_workfn(struct work_struct *work) |
| 1489 | { |
| 1490 | struct sock_xprt *transport = |
| 1491 | container_of(work, struct sock_xprt, recv_worker); |
| 1492 | xs_tcp_data_receive(transport); |
| 1493 | } |
| 1494 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 1495 | /** |
| 1496 | * xs_tcp_data_ready - "data ready" callback for TCP sockets |
| 1497 | * @sk: socket with data to read |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 1498 | * |
| 1499 | */ |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1500 | static void xs_tcp_data_ready(struct sock *sk) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1501 | { |
Trond Myklebust | 66d7a56 | 2015-10-05 11:19:20 -0400 | [diff] [blame] | 1502 | struct sock_xprt *transport; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1503 | struct rpc_xprt *xprt; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1504 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1505 | dprintk("RPC: xs_tcp_data_ready...\n"); |
| 1506 | |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1507 | read_lock_bh(&sk->sk_callback_lock); |
Trond Myklebust | 66d7a56 | 2015-10-05 11:19:20 -0400 | [diff] [blame] | 1508 | if (!(xprt = xprt_from_sock(sk))) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1509 | goto out; |
Trond Myklebust | 66d7a56 | 2015-10-05 11:19:20 -0400 | [diff] [blame] | 1510 | transport = container_of(xprt, struct sock_xprt, xprt); |
| 1511 | |
Neil Brown | 61d0a8e | 2009-09-23 14:36:37 -0400 | [diff] [blame] | 1512 | /* Any data means we had a useful conversation, so |
| 1513 | * the we don't need to delay the next reconnect |
| 1514 | */ |
| 1515 | if (xprt->reestablish_timeout) |
| 1516 | xprt->reestablish_timeout = 0; |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 1517 | queue_work(rpciod_workqueue, &transport->recv_worker); |
Neil Brown | 61d0a8e | 2009-09-23 14:36:37 -0400 | [diff] [blame] | 1518 | |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1519 | out: |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1520 | read_unlock_bh(&sk->sk_callback_lock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1521 | } |
| 1522 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 1523 | /** |
| 1524 | * xs_tcp_state_change - callback to handle TCP socket state changes |
| 1525 | * @sk: socket whose state has changed |
| 1526 | * |
| 1527 | */ |
| 1528 | static void xs_tcp_state_change(struct sock *sk) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1529 | { |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 1530 | struct rpc_xprt *xprt; |
Trond Myklebust | 0fdea1e | 2015-09-16 23:43:17 -0400 | [diff] [blame] | 1531 | struct sock_xprt *transport; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1532 | |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1533 | read_lock_bh(&sk->sk_callback_lock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1534 | if (!(xprt = xprt_from_sock(sk))) |
| 1535 | goto out; |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1536 | dprintk("RPC: xs_tcp_state_change client %p...\n", xprt); |
Andy Chittenden | 669502f | 2010-08-10 10:19:53 -0400 | [diff] [blame] | 1537 | dprintk("RPC: state %x conn %d dead %d zapped %d sk_shutdown %d\n", |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1538 | sk->sk_state, xprt_connected(xprt), |
| 1539 | sock_flag(sk, SOCK_DEAD), |
Andy Chittenden | 669502f | 2010-08-10 10:19:53 -0400 | [diff] [blame] | 1540 | sock_flag(sk, SOCK_ZAPPED), |
| 1541 | sk->sk_shutdown); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1542 | |
Trond Myklebust | 0fdea1e | 2015-09-16 23:43:17 -0400 | [diff] [blame] | 1543 | transport = container_of(xprt, struct sock_xprt, xprt); |
Trond Myklebust | 40b5ea0 | 2013-09-04 12:16:23 -0400 | [diff] [blame] | 1544 | trace_rpc_socket_state_change(xprt, sk->sk_socket); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1545 | switch (sk->sk_state) { |
| 1546 | case TCP_ESTABLISHED: |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1547 | spin_lock(&xprt->transport_lock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1548 | if (!xprt_test_and_set_connected(xprt)) { |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1549 | |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1550 | /* Reset TCP record info */ |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1551 | transport->tcp_offset = 0; |
| 1552 | transport->tcp_reclen = 0; |
| 1553 | transport->tcp_copied = 0; |
Chuck Lever | e136d09 | 2006-12-05 16:35:23 -0500 | [diff] [blame] | 1554 | transport->tcp_flags = |
| 1555 | TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID; |
Trond Myklebust | 8b71798 | 2013-09-26 10:18:04 -0400 | [diff] [blame] | 1556 | xprt->connect_cookie++; |
Trond Myklebust | 0fdea1e | 2015-09-16 23:43:17 -0400 | [diff] [blame] | 1557 | clear_bit(XPRT_SOCK_CONNECTING, &transport->sock_state); |
| 1558 | xprt_clear_connecting(xprt); |
Chuck Lever | 5197113 | 2006-12-05 16:35:19 -0500 | [diff] [blame] | 1559 | |
Trond Myklebust | 2a49199 | 2009-03-11 14:38:00 -0400 | [diff] [blame] | 1560 | xprt_wake_pending_tasks(xprt, -EAGAIN); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1561 | } |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1562 | spin_unlock(&xprt->transport_lock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1563 | break; |
Trond Myklebust | 3b948ae | 2007-11-05 17:42:39 -0500 | [diff] [blame] | 1564 | case TCP_FIN_WAIT1: |
| 1565 | /* The client initiated a shutdown of the socket */ |
Trond Myklebust | 7c1d71c | 2008-04-17 16:52:57 -0400 | [diff] [blame] | 1566 | xprt->connect_cookie++; |
Trond Myklebust | 663b885 | 2008-01-01 18:42:12 -0500 | [diff] [blame] | 1567 | xprt->reestablish_timeout = 0; |
Trond Myklebust | 3b948ae | 2007-11-05 17:42:39 -0500 | [diff] [blame] | 1568 | set_bit(XPRT_CLOSING, &xprt->state); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1569 | smp_mb__before_atomic(); |
Trond Myklebust | 3b948ae | 2007-11-05 17:42:39 -0500 | [diff] [blame] | 1570 | clear_bit(XPRT_CONNECTED, &xprt->state); |
Trond Myklebust | ef80367 | 2007-12-31 16:19:17 -0500 | [diff] [blame] | 1571 | clear_bit(XPRT_CLOSE_WAIT, &xprt->state); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1572 | smp_mb__after_atomic(); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1573 | break; |
Trond Myklebust | 632e3bd | 2006-01-03 09:55:55 +0100 | [diff] [blame] | 1574 | case TCP_CLOSE_WAIT: |
Trond Myklebust | 3b948ae | 2007-11-05 17:42:39 -0500 | [diff] [blame] | 1575 | /* The server initiated a shutdown of the socket */ |
Trond Myklebust | 7c1d71c | 2008-04-17 16:52:57 -0400 | [diff] [blame] | 1576 | xprt->connect_cookie++; |
Trond Myklebust | d0bea45 | 2012-10-23 11:35:47 -0400 | [diff] [blame] | 1577 | clear_bit(XPRT_CONNECTED, &xprt->state); |
Trond Myklebust | a519fc7 | 2012-09-12 16:49:15 -0400 | [diff] [blame] | 1578 | xs_tcp_force_close(xprt); |
Trond Myklebust | 663b885 | 2008-01-01 18:42:12 -0500 | [diff] [blame] | 1579 | case TCP_CLOSING: |
| 1580 | /* |
| 1581 | * If the server closed down the connection, make sure that |
| 1582 | * we back off before reconnecting |
| 1583 | */ |
| 1584 | if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO) |
| 1585 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; |
Trond Myklebust | 3b948ae | 2007-11-05 17:42:39 -0500 | [diff] [blame] | 1586 | break; |
| 1587 | case TCP_LAST_ACK: |
Trond Myklebust | 670f945 | 2009-03-11 14:37:58 -0400 | [diff] [blame] | 1588 | set_bit(XPRT_CLOSING, &xprt->state); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1589 | smp_mb__before_atomic(); |
Trond Myklebust | 3b948ae | 2007-11-05 17:42:39 -0500 | [diff] [blame] | 1590 | clear_bit(XPRT_CONNECTED, &xprt->state); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1591 | smp_mb__after_atomic(); |
Trond Myklebust | 3b948ae | 2007-11-05 17:42:39 -0500 | [diff] [blame] | 1592 | break; |
| 1593 | case TCP_CLOSE: |
Trond Myklebust | 0fdea1e | 2015-09-16 23:43:17 -0400 | [diff] [blame] | 1594 | if (test_and_clear_bit(XPRT_SOCK_CONNECTING, |
| 1595 | &transport->sock_state)) |
| 1596 | xprt_clear_connecting(xprt); |
Trond Myklebust | 7d1e825 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 1597 | xs_sock_mark_closed(xprt); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1598 | } |
| 1599 | out: |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1600 | read_unlock_bh(&sk->sk_callback_lock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1601 | } |
| 1602 | |
Ilpo Järvinen | 1f0fa15 | 2009-02-06 23:48:33 -0800 | [diff] [blame] | 1603 | static void xs_write_space(struct sock *sk) |
| 1604 | { |
Trond Myklebust | 13331a5 | 2016-01-06 08:57:06 -0500 | [diff] [blame] | 1605 | struct socket_wq *wq; |
Ilpo Järvinen | 1f0fa15 | 2009-02-06 23:48:33 -0800 | [diff] [blame] | 1606 | struct rpc_xprt *xprt; |
| 1607 | |
Trond Myklebust | 13331a5 | 2016-01-06 08:57:06 -0500 | [diff] [blame] | 1608 | if (!sk->sk_socket) |
Ilpo Järvinen | 1f0fa15 | 2009-02-06 23:48:33 -0800 | [diff] [blame] | 1609 | return; |
Trond Myklebust | 13331a5 | 2016-01-06 08:57:06 -0500 | [diff] [blame] | 1610 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
Ilpo Järvinen | 1f0fa15 | 2009-02-06 23:48:33 -0800 | [diff] [blame] | 1611 | |
| 1612 | if (unlikely(!(xprt = xprt_from_sock(sk)))) |
| 1613 | return; |
Trond Myklebust | 13331a5 | 2016-01-06 08:57:06 -0500 | [diff] [blame] | 1614 | rcu_read_lock(); |
| 1615 | wq = rcu_dereference(sk->sk_wq); |
| 1616 | if (!wq || test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags) == 0) |
| 1617 | goto out; |
Ilpo Järvinen | 1f0fa15 | 2009-02-06 23:48:33 -0800 | [diff] [blame] | 1618 | |
| 1619 | xprt_write_space(xprt); |
Trond Myklebust | 13331a5 | 2016-01-06 08:57:06 -0500 | [diff] [blame] | 1620 | out: |
| 1621 | rcu_read_unlock(); |
Ilpo Järvinen | 1f0fa15 | 2009-02-06 23:48:33 -0800 | [diff] [blame] | 1622 | } |
| 1623 | |
Trond Myklebust | 2a9e1cf | 2008-10-28 15:21:39 -0400 | [diff] [blame] | 1624 | /** |
Chuck Lever | c7b2cae | 2005-08-11 16:25:50 -0400 | [diff] [blame] | 1625 | * xs_udp_write_space - callback invoked when socket buffer space |
| 1626 | * becomes available |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 1627 | * @sk: socket whose state has changed |
| 1628 | * |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1629 | * Called when more output buffer space is available for this socket. |
| 1630 | * We try not to wake our writers until they can make "significant" |
Chuck Lever | c7b2cae | 2005-08-11 16:25:50 -0400 | [diff] [blame] | 1631 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1632 | * with a bunch of small requests. |
| 1633 | */ |
Chuck Lever | c7b2cae | 2005-08-11 16:25:50 -0400 | [diff] [blame] | 1634 | static void xs_udp_write_space(struct sock *sk) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1635 | { |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1636 | read_lock_bh(&sk->sk_callback_lock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1637 | |
Chuck Lever | c7b2cae | 2005-08-11 16:25:50 -0400 | [diff] [blame] | 1638 | /* from net/core/sock.c:sock_def_write_space */ |
Ilpo Järvinen | 1f0fa15 | 2009-02-06 23:48:33 -0800 | [diff] [blame] | 1639 | if (sock_writeable(sk)) |
| 1640 | xs_write_space(sk); |
Chuck Lever | c7b2cae | 2005-08-11 16:25:50 -0400 | [diff] [blame] | 1641 | |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1642 | read_unlock_bh(&sk->sk_callback_lock); |
Chuck Lever | c7b2cae | 2005-08-11 16:25:50 -0400 | [diff] [blame] | 1643 | } |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1644 | |
Chuck Lever | c7b2cae | 2005-08-11 16:25:50 -0400 | [diff] [blame] | 1645 | /** |
| 1646 | * xs_tcp_write_space - callback invoked when socket buffer space |
| 1647 | * becomes available |
| 1648 | * @sk: socket whose state has changed |
| 1649 | * |
| 1650 | * Called when more output buffer space is available for this socket. |
| 1651 | * We try not to wake our writers until they can make "significant" |
| 1652 | * progress, otherwise we'll waste resources thrashing kernel_sendmsg |
| 1653 | * with a bunch of small requests. |
| 1654 | */ |
| 1655 | static void xs_tcp_write_space(struct sock *sk) |
| 1656 | { |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1657 | read_lock_bh(&sk->sk_callback_lock); |
Chuck Lever | c7b2cae | 2005-08-11 16:25:50 -0400 | [diff] [blame] | 1658 | |
| 1659 | /* from net/core/stream.c:sk_stream_write_space */ |
Eric Dumazet | 64dc613 | 2013-07-22 20:26:31 -0700 | [diff] [blame] | 1660 | if (sk_stream_is_writeable(sk)) |
Ilpo Järvinen | 1f0fa15 | 2009-02-06 23:48:33 -0800 | [diff] [blame] | 1661 | xs_write_space(sk); |
Chuck Lever | c7b2cae | 2005-08-11 16:25:50 -0400 | [diff] [blame] | 1662 | |
Eric Dumazet | f064af1 | 2010-09-22 12:43:39 +0000 | [diff] [blame] | 1663 | read_unlock_bh(&sk->sk_callback_lock); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1664 | } |
| 1665 | |
Chuck Lever | 470056c | 2005-08-25 16:25:56 -0700 | [diff] [blame] | 1666 | static void xs_udp_do_set_buffer_size(struct rpc_xprt *xprt) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1667 | { |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 1668 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
| 1669 | struct sock *sk = transport->inet; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1670 | |
Chuck Lever | 7c6e066 | 2006-12-05 16:35:30 -0500 | [diff] [blame] | 1671 | if (transport->rcvsize) { |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1672 | sk->sk_userlocks |= SOCK_RCVBUF_LOCK; |
Chuck Lever | 7c6e066 | 2006-12-05 16:35:30 -0500 | [diff] [blame] | 1673 | sk->sk_rcvbuf = transport->rcvsize * xprt->max_reqs * 2; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1674 | } |
Chuck Lever | 7c6e066 | 2006-12-05 16:35:30 -0500 | [diff] [blame] | 1675 | if (transport->sndsize) { |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1676 | sk->sk_userlocks |= SOCK_SNDBUF_LOCK; |
Chuck Lever | 7c6e066 | 2006-12-05 16:35:30 -0500 | [diff] [blame] | 1677 | sk->sk_sndbuf = transport->sndsize * xprt->max_reqs * 2; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1678 | sk->sk_write_space(sk); |
| 1679 | } |
| 1680 | } |
| 1681 | |
Chuck Lever | 43118c2 | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1682 | /** |
Chuck Lever | 470056c | 2005-08-25 16:25:56 -0700 | [diff] [blame] | 1683 | * xs_udp_set_buffer_size - set send and receive limits |
Chuck Lever | 43118c2 | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1684 | * @xprt: generic transport |
Chuck Lever | 470056c | 2005-08-25 16:25:56 -0700 | [diff] [blame] | 1685 | * @sndsize: requested size of send buffer, in bytes |
| 1686 | * @rcvsize: requested size of receive buffer, in bytes |
Chuck Lever | 43118c2 | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1687 | * |
Chuck Lever | 470056c | 2005-08-25 16:25:56 -0700 | [diff] [blame] | 1688 | * Set socket send and receive buffer size limits. |
Chuck Lever | 43118c2 | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1689 | */ |
Chuck Lever | 470056c | 2005-08-25 16:25:56 -0700 | [diff] [blame] | 1690 | static void xs_udp_set_buffer_size(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize) |
Chuck Lever | 43118c2 | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1691 | { |
Chuck Lever | 7c6e066 | 2006-12-05 16:35:30 -0500 | [diff] [blame] | 1692 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
| 1693 | |
| 1694 | transport->sndsize = 0; |
Chuck Lever | 470056c | 2005-08-25 16:25:56 -0700 | [diff] [blame] | 1695 | if (sndsize) |
Chuck Lever | 7c6e066 | 2006-12-05 16:35:30 -0500 | [diff] [blame] | 1696 | transport->sndsize = sndsize + 1024; |
| 1697 | transport->rcvsize = 0; |
Chuck Lever | 470056c | 2005-08-25 16:25:56 -0700 | [diff] [blame] | 1698 | if (rcvsize) |
Chuck Lever | 7c6e066 | 2006-12-05 16:35:30 -0500 | [diff] [blame] | 1699 | transport->rcvsize = rcvsize + 1024; |
Chuck Lever | 470056c | 2005-08-25 16:25:56 -0700 | [diff] [blame] | 1700 | |
| 1701 | xs_udp_do_set_buffer_size(xprt); |
Chuck Lever | 43118c2 | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1702 | } |
| 1703 | |
Chuck Lever | 46c0ee8 | 2005-08-25 16:25:52 -0700 | [diff] [blame] | 1704 | /** |
| 1705 | * xs_udp_timer - called when a retransmit timeout occurs on a UDP transport |
| 1706 | * @task: task that timed out |
| 1707 | * |
| 1708 | * Adjust the congestion window after a retransmit timeout has occurred. |
| 1709 | */ |
Trond Myklebust | 6a24dfb | 2013-01-08 09:48:15 -0500 | [diff] [blame] | 1710 | static void xs_udp_timer(struct rpc_xprt *xprt, struct rpc_task *task) |
Chuck Lever | 46c0ee8 | 2005-08-25 16:25:52 -0700 | [diff] [blame] | 1711 | { |
Trond Myklebust | 6a24dfb | 2013-01-08 09:48:15 -0500 | [diff] [blame] | 1712 | xprt_adjust_cwnd(xprt, task, -ETIMEDOUT); |
Chuck Lever | 46c0ee8 | 2005-08-25 16:25:52 -0700 | [diff] [blame] | 1713 | } |
| 1714 | |
Chuck Lever | b85d880 | 2006-05-25 01:40:49 -0400 | [diff] [blame] | 1715 | static unsigned short xs_get_random_port(void) |
| 1716 | { |
| 1717 | unsigned short range = xprt_max_resvport - xprt_min_resvport; |
Aruna-Hewapathirane | 63862b5 | 2014-01-11 07:15:59 -0500 | [diff] [blame] | 1718 | unsigned short rand = (unsigned short) prandom_u32() % range; |
Chuck Lever | b85d880 | 2006-05-25 01:40:49 -0400 | [diff] [blame] | 1719 | return rand + xprt_min_resvport; |
| 1720 | } |
| 1721 | |
Chuck Lever | 9220041 | 2006-01-03 09:55:51 +0100 | [diff] [blame] | 1722 | /** |
Trond Myklebust | 4dda9c8 | 2015-02-08 15:00:06 -0500 | [diff] [blame] | 1723 | * xs_set_reuseaddr_port - set the socket's port and address reuse options |
| 1724 | * @sock: socket |
| 1725 | * |
| 1726 | * Note that this function has to be called on all sockets that share the |
| 1727 | * same port, and it must be called before binding. |
| 1728 | */ |
| 1729 | static void xs_sock_set_reuseport(struct socket *sock) |
| 1730 | { |
Trond Myklebust | 402e23b | 2015-02-09 17:20:14 -0500 | [diff] [blame] | 1731 | int opt = 1; |
Trond Myklebust | 4dda9c8 | 2015-02-08 15:00:06 -0500 | [diff] [blame] | 1732 | |
Trond Myklebust | 402e23b | 2015-02-09 17:20:14 -0500 | [diff] [blame] | 1733 | kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, |
| 1734 | (char *)&opt, sizeof(opt)); |
Trond Myklebust | 4dda9c8 | 2015-02-08 15:00:06 -0500 | [diff] [blame] | 1735 | } |
| 1736 | |
| 1737 | static unsigned short xs_sock_getport(struct socket *sock) |
| 1738 | { |
| 1739 | struct sockaddr_storage buf; |
| 1740 | int buflen; |
| 1741 | unsigned short port = 0; |
| 1742 | |
| 1743 | if (kernel_getsockname(sock, (struct sockaddr *)&buf, &buflen) < 0) |
| 1744 | goto out; |
| 1745 | switch (buf.ss_family) { |
| 1746 | case AF_INET6: |
| 1747 | port = ntohs(((struct sockaddr_in6 *)&buf)->sin6_port); |
| 1748 | break; |
| 1749 | case AF_INET: |
| 1750 | port = ntohs(((struct sockaddr_in *)&buf)->sin_port); |
| 1751 | } |
| 1752 | out: |
| 1753 | return port; |
| 1754 | } |
| 1755 | |
| 1756 | /** |
Chuck Lever | 9220041 | 2006-01-03 09:55:51 +0100 | [diff] [blame] | 1757 | * xs_set_port - reset the port number in the remote endpoint address |
| 1758 | * @xprt: generic transport |
| 1759 | * @port: new port number |
| 1760 | * |
| 1761 | */ |
| 1762 | static void xs_set_port(struct rpc_xprt *xprt, unsigned short port) |
| 1763 | { |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 1764 | dprintk("RPC: setting port for xprt %p to %u\n", xprt, port); |
Chuck Lever | c4efcb1 | 2006-08-22 20:06:19 -0400 | [diff] [blame] | 1765 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 1766 | rpc_set_port(xs_addr(xprt), port); |
| 1767 | xs_update_peer_port(xprt); |
Chuck Lever | 9220041 | 2006-01-03 09:55:51 +0100 | [diff] [blame] | 1768 | } |
| 1769 | |
Trond Myklebust | 4dda9c8 | 2015-02-08 15:00:06 -0500 | [diff] [blame] | 1770 | static void xs_set_srcport(struct sock_xprt *transport, struct socket *sock) |
| 1771 | { |
| 1772 | if (transport->srcport == 0) |
| 1773 | transport->srcport = xs_sock_getport(sock); |
| 1774 | } |
| 1775 | |
Pavel Emelyanov | 5d4ec93 | 2010-10-04 16:51:23 +0400 | [diff] [blame] | 1776 | static unsigned short xs_get_srcport(struct sock_xprt *transport) |
Trond Myklebust | 67a391d | 2007-11-05 17:40:58 -0500 | [diff] [blame] | 1777 | { |
Chuck Lever | fbfffbd | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 1778 | unsigned short port = transport->srcport; |
Trond Myklebust | 67a391d | 2007-11-05 17:40:58 -0500 | [diff] [blame] | 1779 | |
| 1780 | if (port == 0 && transport->xprt.resvport) |
| 1781 | port = xs_get_random_port(); |
| 1782 | return port; |
| 1783 | } |
| 1784 | |
Pavel Emelyanov | baaf4e4 | 2010-10-04 16:51:56 +0400 | [diff] [blame] | 1785 | static unsigned short xs_next_srcport(struct sock_xprt *transport, unsigned short port) |
Trond Myklebust | 67a391d | 2007-11-05 17:40:58 -0500 | [diff] [blame] | 1786 | { |
Chuck Lever | fbfffbd | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 1787 | if (transport->srcport != 0) |
| 1788 | transport->srcport = 0; |
Trond Myklebust | 67a391d | 2007-11-05 17:40:58 -0500 | [diff] [blame] | 1789 | if (!transport->xprt.resvport) |
| 1790 | return 0; |
| 1791 | if (port <= xprt_min_resvport || port > xprt_max_resvport) |
| 1792 | return xprt_max_resvport; |
| 1793 | return --port; |
| 1794 | } |
Pavel Emelyanov | beb59b6 | 2010-10-05 15:53:08 +0400 | [diff] [blame] | 1795 | static int xs_bind(struct sock_xprt *transport, struct socket *sock) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1796 | { |
Pavel Emelyanov | beb59b6 | 2010-10-05 15:53:08 +0400 | [diff] [blame] | 1797 | struct sockaddr_storage myaddr; |
Trond Myklebust | 67a391d | 2007-11-05 17:40:58 -0500 | [diff] [blame] | 1798 | int err, nloop = 0; |
Pavel Emelyanov | 5d4ec93 | 2010-10-04 16:51:23 +0400 | [diff] [blame] | 1799 | unsigned short port = xs_get_srcport(transport); |
Trond Myklebust | 67a391d | 2007-11-05 17:40:58 -0500 | [diff] [blame] | 1800 | unsigned short last; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1801 | |
Chris Perl | 0f7a622 | 2014-09-05 15:40:21 -0400 | [diff] [blame] | 1802 | /* |
| 1803 | * If we are asking for any ephemeral port (i.e. port == 0 && |
| 1804 | * transport->xprt.resvport == 0), don't bind. Let the local |
| 1805 | * port selection happen implicitly when the socket is used |
| 1806 | * (for example at connect time). |
| 1807 | * |
| 1808 | * This ensures that we can continue to establish TCP |
| 1809 | * connections even when all local ephemeral ports are already |
| 1810 | * a part of some TCP connection. This makes no difference |
| 1811 | * for UDP sockets, but also doens't harm them. |
| 1812 | * |
| 1813 | * If we're asking for any reserved port (i.e. port == 0 && |
| 1814 | * transport->xprt.resvport == 1) xs_get_srcport above will |
| 1815 | * ensure that port is non-zero and we will bind as needed. |
| 1816 | */ |
| 1817 | if (port == 0) |
| 1818 | return 0; |
| 1819 | |
Pavel Emelyanov | beb59b6 | 2010-10-05 15:53:08 +0400 | [diff] [blame] | 1820 | memcpy(&myaddr, &transport->srcaddr, transport->xprt.addrlen); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1821 | do { |
Pavel Emelyanov | beb59b6 | 2010-10-05 15:53:08 +0400 | [diff] [blame] | 1822 | rpc_set_port((struct sockaddr *)&myaddr, port); |
| 1823 | err = kernel_bind(sock, (struct sockaddr *)&myaddr, |
| 1824 | transport->xprt.addrlen); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1825 | if (err == 0) { |
Chuck Lever | fbfffbd | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 1826 | transport->srcport = port; |
Frank van Maarseveen | d3bc9a1 | 2007-07-09 22:23:35 +0200 | [diff] [blame] | 1827 | break; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1828 | } |
Trond Myklebust | 67a391d | 2007-11-05 17:40:58 -0500 | [diff] [blame] | 1829 | last = port; |
Pavel Emelyanov | baaf4e4 | 2010-10-04 16:51:56 +0400 | [diff] [blame] | 1830 | port = xs_next_srcport(transport, port); |
Trond Myklebust | 67a391d | 2007-11-05 17:40:58 -0500 | [diff] [blame] | 1831 | if (port > last) |
| 1832 | nloop++; |
| 1833 | } while (err == -EADDRINUSE && nloop != 2); |
Pavel Emelyanov | beb59b6 | 2010-10-05 15:53:08 +0400 | [diff] [blame] | 1834 | |
Chuck Lever | 4232e86 | 2010-10-20 11:52:51 -0400 | [diff] [blame] | 1835 | if (myaddr.ss_family == AF_INET) |
Pavel Emelyanov | beb59b6 | 2010-10-05 15:53:08 +0400 | [diff] [blame] | 1836 | dprintk("RPC: %s %pI4:%u: %s (%d)\n", __func__, |
| 1837 | &((struct sockaddr_in *)&myaddr)->sin_addr, |
| 1838 | port, err ? "failed" : "ok", err); |
| 1839 | else |
| 1840 | dprintk("RPC: %s %pI6:%u: %s (%d)\n", __func__, |
| 1841 | &((struct sockaddr_in6 *)&myaddr)->sin6_addr, |
| 1842 | port, err ? "failed" : "ok", err); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1843 | return err; |
| 1844 | } |
| 1845 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1846 | /* |
| 1847 | * We don't support autobind on AF_LOCAL sockets |
| 1848 | */ |
| 1849 | static void xs_local_rpcbind(struct rpc_task *task) |
| 1850 | { |
Trond Myklebust | fb43d17 | 2016-01-30 16:39:26 -0500 | [diff] [blame] | 1851 | xprt_set_bound(task->tk_xprt); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1852 | } |
| 1853 | |
| 1854 | static void xs_local_set_port(struct rpc_xprt *xprt, unsigned short port) |
| 1855 | { |
| 1856 | } |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 1857 | |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 1858 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 1859 | static struct lock_class_key xs_key[2]; |
| 1860 | static struct lock_class_key xs_slock_key[2]; |
| 1861 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1862 | static inline void xs_reclassify_socketu(struct socket *sock) |
| 1863 | { |
| 1864 | struct sock *sk = sock->sk; |
| 1865 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1866 | sock_lock_init_class_and_name(sk, "slock-AF_LOCAL-RPC", |
| 1867 | &xs_slock_key[1], "sk_lock-AF_LOCAL-RPC", &xs_key[1]); |
| 1868 | } |
| 1869 | |
Chuck Lever | 8945ee5 | 2007-08-06 11:58:04 -0400 | [diff] [blame] | 1870 | static inline void xs_reclassify_socket4(struct socket *sock) |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 1871 | { |
| 1872 | struct sock *sk = sock->sk; |
Chuck Lever | 8945ee5 | 2007-08-06 11:58:04 -0400 | [diff] [blame] | 1873 | |
Chuck Lever | 8945ee5 | 2007-08-06 11:58:04 -0400 | [diff] [blame] | 1874 | sock_lock_init_class_and_name(sk, "slock-AF_INET-RPC", |
| 1875 | &xs_slock_key[0], "sk_lock-AF_INET-RPC", &xs_key[0]); |
| 1876 | } |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 1877 | |
Chuck Lever | 8945ee5 | 2007-08-06 11:58:04 -0400 | [diff] [blame] | 1878 | static inline void xs_reclassify_socket6(struct socket *sock) |
| 1879 | { |
| 1880 | struct sock *sk = sock->sk; |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 1881 | |
Chuck Lever | 8945ee5 | 2007-08-06 11:58:04 -0400 | [diff] [blame] | 1882 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-RPC", |
| 1883 | &xs_slock_key[1], "sk_lock-AF_INET6-RPC", &xs_key[1]); |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 1884 | } |
Pavel Emelyanov | 6bc9638 | 2010-10-04 16:56:38 +0400 | [diff] [blame] | 1885 | |
| 1886 | static inline void xs_reclassify_socket(int family, struct socket *sock) |
| 1887 | { |
Hannes Frederic Sowa | fafc4e1 | 2016-04-08 15:11:27 +0200 | [diff] [blame] | 1888 | if (WARN_ON_ONCE(!sock_allow_reclassification(sock->sk))) |
Weston Andros Adamson | 1b7a181 | 2012-10-23 10:43:39 -0400 | [diff] [blame] | 1889 | return; |
| 1890 | |
Chuck Lever | 4232e86 | 2010-10-20 11:52:51 -0400 | [diff] [blame] | 1891 | switch (family) { |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1892 | case AF_LOCAL: |
| 1893 | xs_reclassify_socketu(sock); |
| 1894 | break; |
Chuck Lever | 4232e86 | 2010-10-20 11:52:51 -0400 | [diff] [blame] | 1895 | case AF_INET: |
Pavel Emelyanov | 6bc9638 | 2010-10-04 16:56:38 +0400 | [diff] [blame] | 1896 | xs_reclassify_socket4(sock); |
Chuck Lever | 4232e86 | 2010-10-20 11:52:51 -0400 | [diff] [blame] | 1897 | break; |
| 1898 | case AF_INET6: |
Pavel Emelyanov | 6bc9638 | 2010-10-04 16:56:38 +0400 | [diff] [blame] | 1899 | xs_reclassify_socket6(sock); |
Chuck Lever | 4232e86 | 2010-10-20 11:52:51 -0400 | [diff] [blame] | 1900 | break; |
| 1901 | } |
Pavel Emelyanov | 6bc9638 | 2010-10-04 16:56:38 +0400 | [diff] [blame] | 1902 | } |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 1903 | #else |
Pavel Emelyanov | 6bc9638 | 2010-10-04 16:56:38 +0400 | [diff] [blame] | 1904 | static inline void xs_reclassify_socket(int family, struct socket *sock) |
| 1905 | { |
| 1906 | } |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 1907 | #endif |
| 1908 | |
NeilBrown | 93dc41b | 2013-10-31 16:14:36 +1100 | [diff] [blame] | 1909 | static void xs_dummy_setup_socket(struct work_struct *work) |
| 1910 | { |
| 1911 | } |
| 1912 | |
Pavel Emelyanov | 6bc9638 | 2010-10-04 16:56:38 +0400 | [diff] [blame] | 1913 | static struct socket *xs_create_sock(struct rpc_xprt *xprt, |
Trond Myklebust | 4dda9c8 | 2015-02-08 15:00:06 -0500 | [diff] [blame] | 1914 | struct sock_xprt *transport, int family, int type, |
| 1915 | int protocol, bool reuseport) |
Pavel Emelyanov | 22f7932 | 2010-10-04 16:54:26 +0400 | [diff] [blame] | 1916 | { |
| 1917 | struct socket *sock; |
| 1918 | int err; |
| 1919 | |
Pavel Emelyanov | 6bc9638 | 2010-10-04 16:56:38 +0400 | [diff] [blame] | 1920 | err = __sock_create(xprt->xprt_net, family, type, protocol, &sock, 1); |
Pavel Emelyanov | 22f7932 | 2010-10-04 16:54:26 +0400 | [diff] [blame] | 1921 | if (err < 0) { |
| 1922 | dprintk("RPC: can't create %d transport socket (%d).\n", |
| 1923 | protocol, -err); |
| 1924 | goto out; |
| 1925 | } |
Pavel Emelyanov | 6bc9638 | 2010-10-04 16:56:38 +0400 | [diff] [blame] | 1926 | xs_reclassify_socket(family, sock); |
Pavel Emelyanov | 22f7932 | 2010-10-04 16:54:26 +0400 | [diff] [blame] | 1927 | |
Trond Myklebust | 4dda9c8 | 2015-02-08 15:00:06 -0500 | [diff] [blame] | 1928 | if (reuseport) |
| 1929 | xs_sock_set_reuseport(sock); |
| 1930 | |
Ben Hutchings | 4cea288 | 2011-02-22 21:54:34 +0000 | [diff] [blame] | 1931 | err = xs_bind(transport, sock); |
| 1932 | if (err) { |
Pavel Emelyanov | 22f7932 | 2010-10-04 16:54:26 +0400 | [diff] [blame] | 1933 | sock_release(sock); |
| 1934 | goto out; |
| 1935 | } |
| 1936 | |
| 1937 | return sock; |
| 1938 | out: |
| 1939 | return ERR_PTR(err); |
| 1940 | } |
| 1941 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1942 | static int xs_local_finish_connecting(struct rpc_xprt *xprt, |
| 1943 | struct socket *sock) |
| 1944 | { |
| 1945 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, |
| 1946 | xprt); |
| 1947 | |
| 1948 | if (!transport->inet) { |
| 1949 | struct sock *sk = sock->sk; |
| 1950 | |
| 1951 | write_lock_bh(&sk->sk_callback_lock); |
| 1952 | |
| 1953 | xs_save_old_callbacks(transport, sk); |
| 1954 | |
| 1955 | sk->sk_user_data = xprt; |
Trond Myklebust | a264809 | 2015-10-06 17:03:00 -0400 | [diff] [blame] | 1956 | sk->sk_data_ready = xs_data_ready; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1957 | sk->sk_write_space = xs_udp_write_space; |
Eric Dumazet | b4411457 | 2016-05-12 21:41:39 -0700 | [diff] [blame] | 1958 | sock_set_flag(sk, SOCK_FASYNC); |
Trond Myklebust | 2118071 | 2013-12-31 13:22:59 -0500 | [diff] [blame] | 1959 | sk->sk_error_report = xs_error_report; |
Trond Myklebust | c212615 | 2015-08-19 21:46:15 -0500 | [diff] [blame] | 1960 | sk->sk_allocation = GFP_NOIO; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1961 | |
| 1962 | xprt_clear_connected(xprt); |
| 1963 | |
| 1964 | /* Reset to new socket */ |
| 1965 | transport->sock = sock; |
| 1966 | transport->inet = sk; |
| 1967 | |
| 1968 | write_unlock_bh(&sk->sk_callback_lock); |
| 1969 | } |
| 1970 | |
| 1971 | /* Tell the socket layer to start connecting... */ |
| 1972 | xprt->stat.connect_count++; |
| 1973 | xprt->stat.connect_start = jiffies; |
| 1974 | return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, 0); |
| 1975 | } |
| 1976 | |
| 1977 | /** |
| 1978 | * xs_local_setup_socket - create AF_LOCAL socket, connect to a local endpoint |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1979 | * @transport: socket transport to connect |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1980 | */ |
J. Bruce Fields | dc10740 | 2013-02-20 17:52:19 -0500 | [diff] [blame] | 1981 | static int xs_local_setup_socket(struct sock_xprt *transport) |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1982 | { |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1983 | struct rpc_xprt *xprt = &transport->xprt; |
| 1984 | struct socket *sock; |
| 1985 | int status = -EIO; |
| 1986 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1987 | status = __sock_create(xprt->xprt_net, AF_LOCAL, |
| 1988 | SOCK_STREAM, 0, &sock, 1); |
| 1989 | if (status < 0) { |
| 1990 | dprintk("RPC: can't create AF_LOCAL " |
| 1991 | "transport socket (%d).\n", -status); |
| 1992 | goto out; |
| 1993 | } |
Stefan Hajnoczi | d135891 | 2015-12-02 14:17:52 +0800 | [diff] [blame] | 1994 | xs_reclassify_socket(AF_LOCAL, sock); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 1995 | |
| 1996 | dprintk("RPC: worker connecting xprt %p via AF_LOCAL to %s\n", |
| 1997 | xprt, xprt->address_strings[RPC_DISPLAY_ADDR]); |
| 1998 | |
| 1999 | status = xs_local_finish_connecting(xprt, sock); |
Trond Myklebust | 40b5ea0 | 2013-09-04 12:16:23 -0400 | [diff] [blame] | 2000 | trace_rpc_socket_connect(xprt, sock, status); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2001 | switch (status) { |
| 2002 | case 0: |
| 2003 | dprintk("RPC: xprt %p connected to %s\n", |
| 2004 | xprt, xprt->address_strings[RPC_DISPLAY_ADDR]); |
| 2005 | xprt_set_connected(xprt); |
Trond Myklebust | 3601c4a | 2014-06-30 13:42:19 -0400 | [diff] [blame] | 2006 | case -ENOBUFS: |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2007 | break; |
| 2008 | case -ENOENT: |
| 2009 | dprintk("RPC: xprt %p: socket %s does not exist\n", |
| 2010 | xprt, xprt->address_strings[RPC_DISPLAY_ADDR]); |
| 2011 | break; |
Trond Myklebust | 4a20a98 | 2012-12-15 17:02:29 -0500 | [diff] [blame] | 2012 | case -ECONNREFUSED: |
| 2013 | dprintk("RPC: xprt %p: connection refused for %s\n", |
| 2014 | xprt, xprt->address_strings[RPC_DISPLAY_ADDR]); |
| 2015 | break; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2016 | default: |
| 2017 | printk(KERN_ERR "%s: unhandled error (%d) connecting to %s\n", |
| 2018 | __func__, -status, |
| 2019 | xprt->address_strings[RPC_DISPLAY_ADDR]); |
| 2020 | } |
| 2021 | |
| 2022 | out: |
| 2023 | xprt_clear_connecting(xprt); |
| 2024 | xprt_wake_pending_tasks(xprt, status); |
J. Bruce Fields | dc10740 | 2013-02-20 17:52:19 -0500 | [diff] [blame] | 2025 | return status; |
| 2026 | } |
| 2027 | |
Linus Torvalds | b666973 | 2013-02-28 18:02:55 -0800 | [diff] [blame] | 2028 | static void xs_local_connect(struct rpc_xprt *xprt, struct rpc_task *task) |
J. Bruce Fields | dc10740 | 2013-02-20 17:52:19 -0500 | [diff] [blame] | 2029 | { |
J. Bruce Fields | dc10740 | 2013-02-20 17:52:19 -0500 | [diff] [blame] | 2030 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
| 2031 | int ret; |
| 2032 | |
| 2033 | if (RPC_IS_ASYNC(task)) { |
| 2034 | /* |
| 2035 | * We want the AF_LOCAL connect to be resolved in the |
| 2036 | * filesystem namespace of the process making the rpc |
| 2037 | * call. Thus we connect synchronously. |
| 2038 | * |
| 2039 | * If we want to support asynchronous AF_LOCAL calls, |
| 2040 | * we'll need to figure out how to pass a namespace to |
| 2041 | * connect. |
| 2042 | */ |
| 2043 | rpc_exit(task, -ENOTCONN); |
| 2044 | return; |
| 2045 | } |
| 2046 | ret = xs_local_setup_socket(transport); |
| 2047 | if (ret && !RPC_IS_SOFTCONN(task)) |
| 2048 | msleep_interruptible(15000); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2049 | } |
| 2050 | |
Jeff Layton | 3c87ef6 | 2015-06-03 16:14:25 -0400 | [diff] [blame] | 2051 | #if IS_ENABLED(CONFIG_SUNRPC_SWAP) |
Jeff Layton | d6e971d | 2015-06-03 16:14:28 -0400 | [diff] [blame] | 2052 | /* |
| 2053 | * Note that this should be called with XPRT_LOCKED held (or when we otherwise |
| 2054 | * know that we have exclusive access to the socket), to guard against |
| 2055 | * races with xs_reset_transport. |
| 2056 | */ |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2057 | static void xs_set_memalloc(struct rpc_xprt *xprt) |
| 2058 | { |
| 2059 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, |
| 2060 | xprt); |
| 2061 | |
Jeff Layton | d6e971d | 2015-06-03 16:14:28 -0400 | [diff] [blame] | 2062 | /* |
| 2063 | * If there's no sock, then we have nothing to set. The |
| 2064 | * reconnecting process will get it for us. |
| 2065 | */ |
| 2066 | if (!transport->inet) |
| 2067 | return; |
Jeff Layton | 8e22813 | 2015-06-03 16:14:26 -0400 | [diff] [blame] | 2068 | if (atomic_read(&xprt->swapper)) |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2069 | sk_set_memalloc(transport->inet); |
| 2070 | } |
| 2071 | |
| 2072 | /** |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 2073 | * xs_enable_swap - Tag this transport as being used for swap. |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2074 | * @xprt: transport to tag |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2075 | * |
Jeff Layton | 8e22813 | 2015-06-03 16:14:26 -0400 | [diff] [blame] | 2076 | * Take a reference to this transport on behalf of the rpc_clnt, and |
| 2077 | * optionally mark it for swapping if it wasn't already. |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2078 | */ |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 2079 | static int |
| 2080 | xs_enable_swap(struct rpc_xprt *xprt) |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2081 | { |
Jeff Layton | d6e971d | 2015-06-03 16:14:28 -0400 | [diff] [blame] | 2082 | struct sock_xprt *xs = container_of(xprt, struct sock_xprt, xprt); |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2083 | |
Jeff Layton | d6e971d | 2015-06-03 16:14:28 -0400 | [diff] [blame] | 2084 | if (atomic_inc_return(&xprt->swapper) != 1) |
| 2085 | return 0; |
| 2086 | if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) |
| 2087 | return -ERESTARTSYS; |
| 2088 | if (xs->inet) |
| 2089 | sk_set_memalloc(xs->inet); |
| 2090 | xprt_release_xprt(xprt, NULL); |
Jeff Layton | 8e22813 | 2015-06-03 16:14:26 -0400 | [diff] [blame] | 2091 | return 0; |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2092 | } |
Jeff Layton | 8e22813 | 2015-06-03 16:14:26 -0400 | [diff] [blame] | 2093 | |
| 2094 | /** |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 2095 | * xs_disable_swap - Untag this transport as being used for swap. |
Jeff Layton | 8e22813 | 2015-06-03 16:14:26 -0400 | [diff] [blame] | 2096 | * @xprt: transport to tag |
| 2097 | * |
| 2098 | * Drop a "swapper" reference to this xprt on behalf of the rpc_clnt. If the |
| 2099 | * swapper refcount goes to 0, untag the socket as a memalloc socket. |
| 2100 | */ |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 2101 | static void |
| 2102 | xs_disable_swap(struct rpc_xprt *xprt) |
Jeff Layton | 8e22813 | 2015-06-03 16:14:26 -0400 | [diff] [blame] | 2103 | { |
Jeff Layton | d6e971d | 2015-06-03 16:14:28 -0400 | [diff] [blame] | 2104 | struct sock_xprt *xs = container_of(xprt, struct sock_xprt, xprt); |
Jeff Layton | 8e22813 | 2015-06-03 16:14:26 -0400 | [diff] [blame] | 2105 | |
Jeff Layton | d6e971d | 2015-06-03 16:14:28 -0400 | [diff] [blame] | 2106 | if (!atomic_dec_and_test(&xprt->swapper)) |
| 2107 | return; |
| 2108 | if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) |
| 2109 | return; |
| 2110 | if (xs->inet) |
| 2111 | sk_clear_memalloc(xs->inet); |
| 2112 | xprt_release_xprt(xprt, NULL); |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2113 | } |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2114 | #else |
| 2115 | static void xs_set_memalloc(struct rpc_xprt *xprt) |
| 2116 | { |
| 2117 | } |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 2118 | |
| 2119 | static int |
| 2120 | xs_enable_swap(struct rpc_xprt *xprt) |
| 2121 | { |
| 2122 | return -EINVAL; |
| 2123 | } |
| 2124 | |
| 2125 | static void |
| 2126 | xs_disable_swap(struct rpc_xprt *xprt) |
| 2127 | { |
| 2128 | } |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2129 | #endif |
| 2130 | |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2131 | static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2132 | { |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2133 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 2134 | |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 2135 | if (!transport->inet) { |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2136 | struct sock *sk = sock->sk; |
| 2137 | |
| 2138 | write_lock_bh(&sk->sk_callback_lock); |
| 2139 | |
Trond Myklebust | 2a9e1cf | 2008-10-28 15:21:39 -0400 | [diff] [blame] | 2140 | xs_save_old_callbacks(transport, sk); |
| 2141 | |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2142 | sk->sk_user_data = xprt; |
Trond Myklebust | f9b2ee7 | 2015-10-06 16:26:05 -0400 | [diff] [blame] | 2143 | sk->sk_data_ready = xs_data_ready; |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2144 | sk->sk_write_space = xs_udp_write_space; |
Eric Dumazet | b4411457 | 2016-05-12 21:41:39 -0700 | [diff] [blame] | 2145 | sock_set_flag(sk, SOCK_FASYNC); |
Trond Myklebust | c212615 | 2015-08-19 21:46:15 -0500 | [diff] [blame] | 2146 | sk->sk_allocation = GFP_NOIO; |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2147 | |
| 2148 | xprt_set_connected(xprt); |
| 2149 | |
| 2150 | /* Reset to new socket */ |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 2151 | transport->sock = sock; |
| 2152 | transport->inet = sk; |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2153 | |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2154 | xs_set_memalloc(xprt); |
| 2155 | |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2156 | write_unlock_bh(&sk->sk_callback_lock); |
| 2157 | } |
Chuck Lever | 470056c | 2005-08-25 16:25:56 -0700 | [diff] [blame] | 2158 | xs_udp_do_set_buffer_size(xprt); |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2159 | } |
| 2160 | |
Pavel Emelyanov | 8c14ff2 | 2010-10-04 16:58:02 +0400 | [diff] [blame] | 2161 | static void xs_udp_setup_socket(struct work_struct *work) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2162 | { |
| 2163 | struct sock_xprt *transport = |
| 2164 | container_of(work, struct sock_xprt, connect_worker.work); |
| 2165 | struct rpc_xprt *xprt = &transport->xprt; |
| 2166 | struct socket *sock = transport->sock; |
Pavel Emelyanov | b65c031 | 2010-10-04 16:53:46 +0400 | [diff] [blame] | 2167 | int status = -EIO; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2168 | |
Pavel Emelyanov | 8c14ff2 | 2010-10-04 16:58:02 +0400 | [diff] [blame] | 2169 | sock = xs_create_sock(xprt, transport, |
Trond Myklebust | 4dda9c8 | 2015-02-08 15:00:06 -0500 | [diff] [blame] | 2170 | xs_addr(xprt)->sa_family, SOCK_DGRAM, |
| 2171 | IPPROTO_UDP, false); |
Pavel Emelyanov | b65c031 | 2010-10-04 16:53:46 +0400 | [diff] [blame] | 2172 | if (IS_ERR(sock)) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2173 | goto out; |
Chuck Lever | 68e220b | 2007-08-06 11:57:48 -0400 | [diff] [blame] | 2174 | |
Chuck Lever | c740eff | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2175 | dprintk("RPC: worker connecting xprt %p via %s to " |
| 2176 | "%s (port %s)\n", xprt, |
| 2177 | xprt->address_strings[RPC_DISPLAY_PROTO], |
| 2178 | xprt->address_strings[RPC_DISPLAY_ADDR], |
| 2179 | xprt->address_strings[RPC_DISPLAY_PORT]); |
Chuck Lever | 68e220b | 2007-08-06 11:57:48 -0400 | [diff] [blame] | 2180 | |
| 2181 | xs_udp_finish_connecting(xprt, sock); |
Trond Myklebust | 40b5ea0 | 2013-09-04 12:16:23 -0400 | [diff] [blame] | 2182 | trace_rpc_socket_connect(xprt, sock, 0); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2183 | status = 0; |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2184 | out: |
Trond Myklebust | 718ba5b | 2015-02-08 18:19:25 -0500 | [diff] [blame] | 2185 | xprt_unlock_connect(xprt, transport); |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2186 | xprt_clear_connecting(xprt); |
Trond Myklebust | 7d1e825 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 2187 | xprt_wake_pending_tasks(xprt, status); |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2188 | } |
| 2189 | |
Trond Myklebust | 4876cc7 | 2015-06-19 16:17:57 -0400 | [diff] [blame] | 2190 | /** |
| 2191 | * xs_tcp_shutdown - gracefully shut down a TCP socket |
| 2192 | * @xprt: transport |
| 2193 | * |
| 2194 | * Initiates a graceful shutdown of the TCP socket by calling the |
| 2195 | * equivalent of shutdown(SHUT_RDWR); |
| 2196 | */ |
| 2197 | static void xs_tcp_shutdown(struct rpc_xprt *xprt) |
| 2198 | { |
| 2199 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
| 2200 | struct socket *sock = transport->sock; |
| 2201 | |
| 2202 | if (sock == NULL) |
| 2203 | return; |
| 2204 | if (xprt_connected(xprt)) { |
| 2205 | kernel_sock_shutdown(sock, SHUT_RDWR); |
| 2206 | trace_rpc_socket_shutdown(xprt, sock); |
| 2207 | } else |
| 2208 | xs_reset_transport(transport); |
| 2209 | } |
| 2210 | |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2211 | static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2212 | { |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2213 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
Trond Myklebust | fe19a96 | 2011-03-18 20:21:23 -0400 | [diff] [blame] | 2214 | int ret = -ENOTCONN; |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 2215 | |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 2216 | if (!transport->inet) { |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2217 | struct sock *sk = sock->sk; |
Trond Myklebust | 7f260e8 | 2013-09-24 11:25:22 -0400 | [diff] [blame] | 2218 | unsigned int keepidle = xprt->timeout->to_initval / HZ; |
| 2219 | unsigned int keepcnt = xprt->timeout->to_retries + 1; |
| 2220 | unsigned int opt_on = 1; |
Trond Myklebust | 775f06a | 2015-06-20 15:31:54 -0400 | [diff] [blame] | 2221 | unsigned int timeo; |
Trond Myklebust | 7f260e8 | 2013-09-24 11:25:22 -0400 | [diff] [blame] | 2222 | |
| 2223 | /* TCP Keepalive options */ |
| 2224 | kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, |
| 2225 | (char *)&opt_on, sizeof(opt_on)); |
| 2226 | kernel_setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, |
| 2227 | (char *)&keepidle, sizeof(keepidle)); |
| 2228 | kernel_setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, |
| 2229 | (char *)&keepidle, sizeof(keepidle)); |
| 2230 | kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT, |
| 2231 | (char *)&keepcnt, sizeof(keepcnt)); |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2232 | |
Trond Myklebust | 775f06a | 2015-06-20 15:31:54 -0400 | [diff] [blame] | 2233 | /* TCP user timeout (see RFC5482) */ |
| 2234 | timeo = jiffies_to_msecs(xprt->timeout->to_initval) * |
| 2235 | (xprt->timeout->to_retries + 1); |
| 2236 | kernel_setsockopt(sock, SOL_TCP, TCP_USER_TIMEOUT, |
| 2237 | (char *)&timeo, sizeof(timeo)); |
| 2238 | |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2239 | write_lock_bh(&sk->sk_callback_lock); |
| 2240 | |
Trond Myklebust | 2a9e1cf | 2008-10-28 15:21:39 -0400 | [diff] [blame] | 2241 | xs_save_old_callbacks(transport, sk); |
| 2242 | |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2243 | sk->sk_user_data = xprt; |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2244 | sk->sk_data_ready = xs_tcp_data_ready; |
| 2245 | sk->sk_state_change = xs_tcp_state_change; |
| 2246 | sk->sk_write_space = xs_tcp_write_space; |
Eric Dumazet | b4411457 | 2016-05-12 21:41:39 -0700 | [diff] [blame] | 2247 | sock_set_flag(sk, SOCK_FASYNC); |
Trond Myklebust | 2118071 | 2013-12-31 13:22:59 -0500 | [diff] [blame] | 2248 | sk->sk_error_report = xs_error_report; |
Trond Myklebust | c212615 | 2015-08-19 21:46:15 -0500 | [diff] [blame] | 2249 | sk->sk_allocation = GFP_NOIO; |
Chuck Lever | 3167e12 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2250 | |
| 2251 | /* socket options */ |
Chuck Lever | 3167e12 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2252 | sock_reset_flag(sk, SOCK_LINGER); |
Chuck Lever | 3167e12 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2253 | tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF; |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2254 | |
| 2255 | xprt_clear_connected(xprt); |
| 2256 | |
| 2257 | /* Reset to new socket */ |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 2258 | transport->sock = sock; |
| 2259 | transport->inet = sk; |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2260 | |
| 2261 | write_unlock_bh(&sk->sk_callback_lock); |
| 2262 | } |
| 2263 | |
Trond Myklebust | 01d37c4 | 2009-03-11 14:09:39 -0400 | [diff] [blame] | 2264 | if (!xprt_bound(xprt)) |
Trond Myklebust | fe19a96 | 2011-03-18 20:21:23 -0400 | [diff] [blame] | 2265 | goto out; |
Trond Myklebust | 01d37c4 | 2009-03-11 14:09:39 -0400 | [diff] [blame] | 2266 | |
Mel Gorman | a564b8f | 2012-07-31 16:45:12 -0700 | [diff] [blame] | 2267 | xs_set_memalloc(xprt); |
| 2268 | |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2269 | /* Tell the socket layer to start connecting... */ |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2270 | xprt->stat.connect_count++; |
| 2271 | xprt->stat.connect_start = jiffies; |
Trond Myklebust | 0fdea1e | 2015-09-16 23:43:17 -0400 | [diff] [blame] | 2272 | set_bit(XPRT_SOCK_CONNECTING, &transport->sock_state); |
Trond Myklebust | fe19a96 | 2011-03-18 20:21:23 -0400 | [diff] [blame] | 2273 | ret = kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK); |
| 2274 | switch (ret) { |
| 2275 | case 0: |
Trond Myklebust | 4dda9c8 | 2015-02-08 15:00:06 -0500 | [diff] [blame] | 2276 | xs_set_srcport(transport, sock); |
Trond Myklebust | fe19a96 | 2011-03-18 20:21:23 -0400 | [diff] [blame] | 2277 | case -EINPROGRESS: |
| 2278 | /* SYN_SENT! */ |
Trond Myklebust | fe19a96 | 2011-03-18 20:21:23 -0400 | [diff] [blame] | 2279 | if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO) |
| 2280 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; |
| 2281 | } |
| 2282 | out: |
| 2283 | return ret; |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2284 | } |
| 2285 | |
| 2286 | /** |
Trond Myklebust | b61d59f | 2009-03-11 14:38:04 -0400 | [diff] [blame] | 2287 | * xs_tcp_setup_socket - create a TCP socket and connect to a remote endpoint |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2288 | * |
| 2289 | * Invoked by a work queue tasklet. |
| 2290 | */ |
Pavel Emelyanov | cdd518d | 2010-10-04 16:57:40 +0400 | [diff] [blame] | 2291 | static void xs_tcp_setup_socket(struct work_struct *work) |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2292 | { |
Pavel Emelyanov | cdd518d | 2010-10-04 16:57:40 +0400 | [diff] [blame] | 2293 | struct sock_xprt *transport = |
| 2294 | container_of(work, struct sock_xprt, connect_worker.work); |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2295 | struct socket *sock = transport->sock; |
Pavel Emelyanov | a9f5f0f | 2010-10-04 16:52:25 +0400 | [diff] [blame] | 2296 | struct rpc_xprt *xprt = &transport->xprt; |
Trond Myklebust | b61d59f | 2009-03-11 14:38:04 -0400 | [diff] [blame] | 2297 | int status = -EIO; |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2298 | |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2299 | if (!sock) { |
Pavel Emelyanov | cdd518d | 2010-10-04 16:57:40 +0400 | [diff] [blame] | 2300 | sock = xs_create_sock(xprt, transport, |
Trond Myklebust | 4dda9c8 | 2015-02-08 15:00:06 -0500 | [diff] [blame] | 2301 | xs_addr(xprt)->sa_family, SOCK_STREAM, |
| 2302 | IPPROTO_TCP, true); |
Trond Myklebust | b61d59f | 2009-03-11 14:38:04 -0400 | [diff] [blame] | 2303 | if (IS_ERR(sock)) { |
| 2304 | status = PTR_ERR(sock); |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2305 | goto out; |
| 2306 | } |
Trond Myklebust | 7d1e825 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 2307 | } |
| 2308 | |
Chuck Lever | c740eff | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2309 | dprintk("RPC: worker connecting xprt %p via %s to " |
| 2310 | "%s (port %s)\n", xprt, |
| 2311 | xprt->address_strings[RPC_DISPLAY_PROTO], |
| 2312 | xprt->address_strings[RPC_DISPLAY_ADDR], |
| 2313 | xprt->address_strings[RPC_DISPLAY_PORT]); |
Chuck Lever | 16be2d2 | 2007-08-06 11:57:38 -0400 | [diff] [blame] | 2314 | |
| 2315 | status = xs_tcp_finish_connecting(xprt, sock); |
Trond Myklebust | 40b5ea0 | 2013-09-04 12:16:23 -0400 | [diff] [blame] | 2316 | trace_rpc_socket_connect(xprt, sock, status); |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 2317 | dprintk("RPC: %p connect status %d connected %d sock state %d\n", |
| 2318 | xprt, -status, xprt_connected(xprt), |
| 2319 | sock->sk->sk_state); |
Trond Myklebust | 2a49199 | 2009-03-11 14:38:00 -0400 | [diff] [blame] | 2320 | switch (status) { |
Trond Myklebust | f75e674 | 2009-04-21 17:18:20 -0400 | [diff] [blame] | 2321 | default: |
| 2322 | printk("%s: connect returned unhandled error %d\n", |
| 2323 | __func__, status); |
| 2324 | case -EADDRNOTAVAIL: |
| 2325 | /* We're probably in TIME_WAIT. Get rid of existing socket, |
| 2326 | * and retry |
| 2327 | */ |
Trond Myklebust | a519fc7 | 2012-09-12 16:49:15 -0400 | [diff] [blame] | 2328 | xs_tcp_force_close(xprt); |
Trond Myklebust | 88b5ed7 | 2009-06-17 13:22:57 -0700 | [diff] [blame] | 2329 | break; |
Trond Myklebust | 2a49199 | 2009-03-11 14:38:00 -0400 | [diff] [blame] | 2330 | case 0: |
| 2331 | case -EINPROGRESS: |
| 2332 | case -EALREADY: |
Trond Myklebust | 718ba5b | 2015-02-08 18:19:25 -0500 | [diff] [blame] | 2333 | xprt_unlock_connect(xprt, transport); |
Trond Myklebust | 7d1e825 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 2334 | return; |
Trond Myklebust | 9fcfe0c | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2335 | case -EINVAL: |
| 2336 | /* Happens, for instance, if the user specified a link |
| 2337 | * local IPv6 address without a scope-id. |
| 2338 | */ |
Trond Myklebust | 3ed5e2a | 2013-03-04 17:29:33 -0500 | [diff] [blame] | 2339 | case -ECONNREFUSED: |
| 2340 | case -ECONNRESET: |
| 2341 | case -ENETUNREACH: |
Trond Myklebust | 3913c78 | 2015-02-08 21:44:04 -0500 | [diff] [blame] | 2342 | case -EADDRINUSE: |
Trond Myklebust | 3601c4a | 2014-06-30 13:42:19 -0400 | [diff] [blame] | 2343 | case -ENOBUFS: |
Trond Myklebust | 3ed5e2a | 2013-03-04 17:29:33 -0500 | [diff] [blame] | 2344 | /* retry with existing socket, after a delay */ |
Trond Myklebust | 4efdd92 | 2015-02-08 15:34:28 -0500 | [diff] [blame] | 2345 | xs_tcp_force_close(xprt); |
Trond Myklebust | 9fcfe0c | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2346 | goto out; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2347 | } |
Trond Myklebust | 2a49199 | 2009-03-11 14:38:00 -0400 | [diff] [blame] | 2348 | status = -EAGAIN; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2349 | out: |
Trond Myklebust | 718ba5b | 2015-02-08 18:19:25 -0500 | [diff] [blame] | 2350 | xprt_unlock_connect(xprt, transport); |
Chuck Lever | 2226feb | 2005-08-11 16:25:38 -0400 | [diff] [blame] | 2351 | xprt_clear_connecting(xprt); |
Trond Myklebust | 7d1e825 | 2009-03-11 14:38:03 -0400 | [diff] [blame] | 2352 | xprt_wake_pending_tasks(xprt, status); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2353 | } |
| 2354 | |
Chuck Lever | 68e220b | 2007-08-06 11:57:48 -0400 | [diff] [blame] | 2355 | /** |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 2356 | * xs_connect - connect a socket to a remote endpoint |
Trond Myklebust | 1b09209 | 2013-01-08 09:26:49 -0500 | [diff] [blame] | 2357 | * @xprt: pointer to transport structure |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 2358 | * @task: address of RPC task that manages state of connect request |
| 2359 | * |
| 2360 | * TCP: If the remote end dropped the connection, delay reconnecting. |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2361 | * |
| 2362 | * UDP socket connects are synchronous, but we use a work queue anyway |
| 2363 | * to guarantee that even unprivileged user processes can set up a |
| 2364 | * socket on a privileged port. |
| 2365 | * |
| 2366 | * If a UDP socket connect fails, the delay behavior here prevents |
| 2367 | * retry floods (hard mounts). |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 2368 | */ |
Trond Myklebust | 1b09209 | 2013-01-08 09:26:49 -0500 | [diff] [blame] | 2369 | static void xs_connect(struct rpc_xprt *xprt, struct rpc_task *task) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2370 | { |
Chuck Lever | ee0ac0c | 2006-12-05 16:35:15 -0500 | [diff] [blame] | 2371 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2372 | |
Trond Myklebust | 718ba5b | 2015-02-08 18:19:25 -0500 | [diff] [blame] | 2373 | WARN_ON_ONCE(!xprt_lock_connect(xprt, task, transport)); |
| 2374 | |
Trond Myklebust | 99b1a4c | 2015-08-13 15:33:51 -0400 | [diff] [blame] | 2375 | if (transport->sock != NULL) { |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 2376 | dprintk("RPC: xs_connect delayed xprt %p for %lu " |
| 2377 | "seconds\n", |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2378 | xprt, xprt->reestablish_timeout / HZ); |
Trond Myklebust | 99b1a4c | 2015-08-13 15:33:51 -0400 | [diff] [blame] | 2379 | |
| 2380 | /* Start by resetting any existing state */ |
| 2381 | xs_reset_transport(transport); |
| 2382 | |
Trond Myklebust | c1384c9 | 2007-06-14 18:00:42 -0400 | [diff] [blame] | 2383 | queue_delayed_work(rpciod_workqueue, |
| 2384 | &transport->connect_worker, |
| 2385 | xprt->reestablish_timeout); |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2386 | xprt->reestablish_timeout <<= 1; |
Neil Brown | 61d0a8e | 2009-09-23 14:36:37 -0400 | [diff] [blame] | 2387 | if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO) |
| 2388 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2389 | if (xprt->reestablish_timeout > XS_TCP_MAX_REEST_TO) |
| 2390 | xprt->reestablish_timeout = XS_TCP_MAX_REEST_TO; |
Chuck Lever | b0d93ad | 2005-08-11 16:25:53 -0400 | [diff] [blame] | 2391 | } else { |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 2392 | dprintk("RPC: xs_connect scheduled xprt %p\n", xprt); |
Trond Myklebust | c1384c9 | 2007-06-14 18:00:42 -0400 | [diff] [blame] | 2393 | queue_delayed_work(rpciod_workqueue, |
| 2394 | &transport->connect_worker, 0); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2395 | } |
| 2396 | } |
| 2397 | |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2398 | /** |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2399 | * xs_local_print_stats - display AF_LOCAL socket-specifc stats |
| 2400 | * @xprt: rpc_xprt struct containing statistics |
| 2401 | * @seq: output file |
| 2402 | * |
| 2403 | */ |
| 2404 | static void xs_local_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) |
| 2405 | { |
| 2406 | long idle_time = 0; |
| 2407 | |
| 2408 | if (xprt_connected(xprt)) |
| 2409 | idle_time = (long)(jiffies - xprt->last_used) / HZ; |
| 2410 | |
| 2411 | seq_printf(seq, "\txprt:\tlocal %lu %lu %lu %ld %lu %lu %lu " |
Andy Adamson | 15a4520 | 2012-02-14 16:19:18 -0500 | [diff] [blame] | 2412 | "%llu %llu %lu %llu %llu\n", |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2413 | xprt->stat.bind_count, |
| 2414 | xprt->stat.connect_count, |
| 2415 | xprt->stat.connect_time, |
| 2416 | idle_time, |
| 2417 | xprt->stat.sends, |
| 2418 | xprt->stat.recvs, |
| 2419 | xprt->stat.bad_xids, |
| 2420 | xprt->stat.req_u, |
Andy Adamson | 15a4520 | 2012-02-14 16:19:18 -0500 | [diff] [blame] | 2421 | xprt->stat.bklog_u, |
| 2422 | xprt->stat.max_slots, |
| 2423 | xprt->stat.sending_u, |
| 2424 | xprt->stat.pending_u); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2425 | } |
| 2426 | |
| 2427 | /** |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2428 | * xs_udp_print_stats - display UDP socket-specifc stats |
| 2429 | * @xprt: rpc_xprt struct containing statistics |
| 2430 | * @seq: output file |
| 2431 | * |
| 2432 | */ |
| 2433 | static void xs_udp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) |
| 2434 | { |
Chuck Lever | c847546 | 2006-12-05 16:35:26 -0500 | [diff] [blame] | 2435 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
| 2436 | |
Andy Adamson | 15a4520 | 2012-02-14 16:19:18 -0500 | [diff] [blame] | 2437 | seq_printf(seq, "\txprt:\tudp %u %lu %lu %lu %lu %llu %llu " |
| 2438 | "%lu %llu %llu\n", |
Chuck Lever | fbfffbd | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2439 | transport->srcport, |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2440 | xprt->stat.bind_count, |
| 2441 | xprt->stat.sends, |
| 2442 | xprt->stat.recvs, |
| 2443 | xprt->stat.bad_xids, |
| 2444 | xprt->stat.req_u, |
Andy Adamson | 15a4520 | 2012-02-14 16:19:18 -0500 | [diff] [blame] | 2445 | xprt->stat.bklog_u, |
| 2446 | xprt->stat.max_slots, |
| 2447 | xprt->stat.sending_u, |
| 2448 | xprt->stat.pending_u); |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2449 | } |
| 2450 | |
| 2451 | /** |
| 2452 | * xs_tcp_print_stats - display TCP socket-specifc stats |
| 2453 | * @xprt: rpc_xprt struct containing statistics |
| 2454 | * @seq: output file |
| 2455 | * |
| 2456 | */ |
| 2457 | static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) |
| 2458 | { |
Chuck Lever | c847546 | 2006-12-05 16:35:26 -0500 | [diff] [blame] | 2459 | struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2460 | long idle_time = 0; |
| 2461 | |
| 2462 | if (xprt_connected(xprt)) |
| 2463 | idle_time = (long)(jiffies - xprt->last_used) / HZ; |
| 2464 | |
Andy Adamson | 15a4520 | 2012-02-14 16:19:18 -0500 | [diff] [blame] | 2465 | seq_printf(seq, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu " |
| 2466 | "%llu %llu %lu %llu %llu\n", |
Chuck Lever | fbfffbd | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2467 | transport->srcport, |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2468 | xprt->stat.bind_count, |
| 2469 | xprt->stat.connect_count, |
| 2470 | xprt->stat.connect_time, |
| 2471 | idle_time, |
| 2472 | xprt->stat.sends, |
| 2473 | xprt->stat.recvs, |
| 2474 | xprt->stat.bad_xids, |
| 2475 | xprt->stat.req_u, |
Andy Adamson | 15a4520 | 2012-02-14 16:19:18 -0500 | [diff] [blame] | 2476 | xprt->stat.bklog_u, |
| 2477 | xprt->stat.max_slots, |
| 2478 | xprt->stat.sending_u, |
| 2479 | xprt->stat.pending_u); |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2480 | } |
| 2481 | |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2482 | /* |
| 2483 | * Allocate a bunch of pages for a scratch buffer for the rpc code. The reason |
| 2484 | * we allocate pages instead doing a kmalloc like rpc_malloc is because we want |
| 2485 | * to use the server side send routines. |
| 2486 | */ |
H Hartley Sweeten | 5a51f13 | 2010-01-14 15:38:31 -0700 | [diff] [blame] | 2487 | static void *bc_malloc(struct rpc_task *task, size_t size) |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2488 | { |
| 2489 | struct page *page; |
| 2490 | struct rpc_buffer *buf; |
| 2491 | |
Weston Andros Adamson | b8a13d0 | 2012-10-23 10:43:43 -0400 | [diff] [blame] | 2492 | WARN_ON_ONCE(size > PAGE_SIZE - sizeof(struct rpc_buffer)); |
| 2493 | if (size > PAGE_SIZE - sizeof(struct rpc_buffer)) |
| 2494 | return NULL; |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2495 | |
Weston Andros Adamson | b8a13d0 | 2012-10-23 10:43:43 -0400 | [diff] [blame] | 2496 | page = alloc_page(GFP_KERNEL); |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2497 | if (!page) |
| 2498 | return NULL; |
| 2499 | |
| 2500 | buf = page_address(page); |
| 2501 | buf->len = PAGE_SIZE; |
| 2502 | |
| 2503 | return buf->data; |
| 2504 | } |
| 2505 | |
| 2506 | /* |
| 2507 | * Free the space allocated in the bc_alloc routine |
| 2508 | */ |
H Hartley Sweeten | 5a51f13 | 2010-01-14 15:38:31 -0700 | [diff] [blame] | 2509 | static void bc_free(void *buffer) |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2510 | { |
| 2511 | struct rpc_buffer *buf; |
| 2512 | |
| 2513 | if (!buffer) |
| 2514 | return; |
| 2515 | |
| 2516 | buf = container_of(buffer, struct rpc_buffer, data); |
| 2517 | free_page((unsigned long)buf); |
| 2518 | } |
| 2519 | |
| 2520 | /* |
| 2521 | * Use the svc_sock to send the callback. Must be called with svsk->sk_mutex |
| 2522 | * held. Borrows heavily from svc_tcp_sendto and xs_tcp_send_request. |
| 2523 | */ |
| 2524 | static int bc_sendto(struct rpc_rqst *req) |
| 2525 | { |
| 2526 | int len; |
| 2527 | struct xdr_buf *xbufp = &req->rq_snd_buf; |
| 2528 | struct rpc_xprt *xprt = req->rq_xprt; |
| 2529 | struct sock_xprt *transport = |
| 2530 | container_of(xprt, struct sock_xprt, xprt); |
| 2531 | struct socket *sock = transport->sock; |
| 2532 | unsigned long headoff; |
| 2533 | unsigned long tailoff; |
| 2534 | |
Chuck Lever | 61677ee | 2011-05-09 15:22:34 -0400 | [diff] [blame] | 2535 | xs_encode_stream_record_marker(xbufp); |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2536 | |
| 2537 | tailoff = (unsigned long)xbufp->tail[0].iov_base & ~PAGE_MASK; |
| 2538 | headoff = (unsigned long)xbufp->head[0].iov_base & ~PAGE_MASK; |
| 2539 | len = svc_send_common(sock, xbufp, |
| 2540 | virt_to_page(xbufp->head[0].iov_base), headoff, |
| 2541 | xbufp->tail[0].iov_base, tailoff); |
| 2542 | |
| 2543 | if (len != xbufp->len) { |
| 2544 | printk(KERN_NOTICE "Error sending entire callback!\n"); |
| 2545 | len = -EAGAIN; |
| 2546 | } |
| 2547 | |
| 2548 | return len; |
| 2549 | } |
| 2550 | |
| 2551 | /* |
| 2552 | * The send routine. Borrows from svc_send |
| 2553 | */ |
| 2554 | static int bc_send_request(struct rpc_task *task) |
| 2555 | { |
| 2556 | struct rpc_rqst *req = task->tk_rqstp; |
| 2557 | struct svc_xprt *xprt; |
Andrzej Hajda | 7fc5613 | 2015-09-24 16:00:09 +0200 | [diff] [blame] | 2558 | int len; |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2559 | |
| 2560 | dprintk("sending request with xid: %08x\n", ntohl(req->rq_xid)); |
| 2561 | /* |
| 2562 | * Get the server socket associated with this callback xprt |
| 2563 | */ |
| 2564 | xprt = req->rq_xprt->bc_xprt; |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2565 | |
| 2566 | /* |
| 2567 | * Grab the mutex to serialize data as the connection is shared |
| 2568 | * with the fore channel |
| 2569 | */ |
| 2570 | if (!mutex_trylock(&xprt->xpt_mutex)) { |
| 2571 | rpc_sleep_on(&xprt->xpt_bc_pending, task, NULL); |
| 2572 | if (!mutex_trylock(&xprt->xpt_mutex)) |
| 2573 | return -EAGAIN; |
| 2574 | rpc_wake_up_queued_task(&xprt->xpt_bc_pending, task); |
| 2575 | } |
| 2576 | if (test_bit(XPT_DEAD, &xprt->xpt_flags)) |
| 2577 | len = -ENOTCONN; |
| 2578 | else |
| 2579 | len = bc_sendto(req); |
| 2580 | mutex_unlock(&xprt->xpt_mutex); |
| 2581 | |
| 2582 | if (len > 0) |
| 2583 | len = 0; |
| 2584 | |
| 2585 | return len; |
| 2586 | } |
| 2587 | |
| 2588 | /* |
| 2589 | * The close routine. Since this is client initiated, we do nothing |
| 2590 | */ |
| 2591 | |
| 2592 | static void bc_close(struct rpc_xprt *xprt) |
| 2593 | { |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2594 | } |
| 2595 | |
| 2596 | /* |
| 2597 | * The xprt destroy routine. Again, because this connection is client |
| 2598 | * initiated, we do nothing |
| 2599 | */ |
| 2600 | |
| 2601 | static void bc_destroy(struct rpc_xprt *xprt) |
| 2602 | { |
Kinglong Mee | 47f72ef | 2014-03-24 11:58:16 +0800 | [diff] [blame] | 2603 | dprintk("RPC: bc_destroy xprt %p\n", xprt); |
| 2604 | |
| 2605 | xs_xprt_free(xprt); |
| 2606 | module_put(THIS_MODULE); |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2607 | } |
| 2608 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2609 | static struct rpc_xprt_ops xs_local_ops = { |
| 2610 | .reserve_xprt = xprt_reserve_xprt, |
| 2611 | .release_xprt = xs_tcp_release_xprt, |
Trond Myklebust | f39c1bf | 2012-09-07 11:08:50 -0400 | [diff] [blame] | 2612 | .alloc_slot = xprt_alloc_slot, |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2613 | .rpcbind = xs_local_rpcbind, |
| 2614 | .set_port = xs_local_set_port, |
J. Bruce Fields | dc10740 | 2013-02-20 17:52:19 -0500 | [diff] [blame] | 2615 | .connect = xs_local_connect, |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2616 | .buf_alloc = rpc_malloc, |
| 2617 | .buf_free = rpc_free, |
| 2618 | .send_request = xs_local_send_request, |
| 2619 | .set_retrans_timeout = xprt_set_retrans_timeout_def, |
| 2620 | .close = xs_close, |
Trond Myklebust | a1311d8 | 2013-10-31 09:18:49 -0400 | [diff] [blame] | 2621 | .destroy = xs_destroy, |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2622 | .print_stats = xs_local_print_stats, |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 2623 | .enable_swap = xs_enable_swap, |
| 2624 | .disable_swap = xs_disable_swap, |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2625 | }; |
| 2626 | |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 2627 | static struct rpc_xprt_ops xs_udp_ops = { |
Chuck Lever | 43118c2 | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 2628 | .set_buffer_size = xs_udp_set_buffer_size, |
Chuck Lever | 12a8046 | 2005-08-25 16:25:51 -0700 | [diff] [blame] | 2629 | .reserve_xprt = xprt_reserve_xprt_cong, |
Chuck Lever | 49e9a89 | 2005-08-25 16:25:51 -0700 | [diff] [blame] | 2630 | .release_xprt = xprt_release_xprt_cong, |
Trond Myklebust | f39c1bf | 2012-09-07 11:08:50 -0400 | [diff] [blame] | 2631 | .alloc_slot = xprt_alloc_slot, |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 2632 | .rpcbind = rpcb_getport_async, |
Chuck Lever | 9220041 | 2006-01-03 09:55:51 +0100 | [diff] [blame] | 2633 | .set_port = xs_set_port, |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 2634 | .connect = xs_connect, |
Chuck Lever | 0210714 | 2006-01-03 09:55:49 +0100 | [diff] [blame] | 2635 | .buf_alloc = rpc_malloc, |
| 2636 | .buf_free = rpc_free, |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 2637 | .send_request = xs_udp_send_request, |
Chuck Lever | fe3aca2 | 2005-08-25 16:25:50 -0700 | [diff] [blame] | 2638 | .set_retrans_timeout = xprt_set_retrans_timeout_rtt, |
Chuck Lever | 46c0ee8 | 2005-08-25 16:25:52 -0700 | [diff] [blame] | 2639 | .timer = xs_udp_timer, |
Chuck Lever | a58dd39 | 2005-08-25 16:25:53 -0700 | [diff] [blame] | 2640 | .release_request = xprt_release_rqst_cong, |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 2641 | .close = xs_close, |
| 2642 | .destroy = xs_destroy, |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2643 | .print_stats = xs_udp_print_stats, |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 2644 | .enable_swap = xs_enable_swap, |
| 2645 | .disable_swap = xs_disable_swap, |
Chuck Lever | 4a06825 | 2015-05-11 14:02:25 -0400 | [diff] [blame] | 2646 | .inject_disconnect = xs_inject_disconnect, |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 2647 | }; |
| 2648 | |
| 2649 | static struct rpc_xprt_ops xs_tcp_ops = { |
Chuck Lever | 12a8046 | 2005-08-25 16:25:51 -0700 | [diff] [blame] | 2650 | .reserve_xprt = xprt_reserve_xprt, |
Trond Myklebust | e0ab53d | 2006-07-27 17:22:50 -0400 | [diff] [blame] | 2651 | .release_xprt = xs_tcp_release_xprt, |
Trond Myklebust | f39c1bf | 2012-09-07 11:08:50 -0400 | [diff] [blame] | 2652 | .alloc_slot = xprt_lock_and_alloc_slot, |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 2653 | .rpcbind = rpcb_getport_async, |
Chuck Lever | 9220041 | 2006-01-03 09:55:51 +0100 | [diff] [blame] | 2654 | .set_port = xs_set_port, |
Trond Myklebust | 0b9e794 | 2010-04-16 16:41:57 -0400 | [diff] [blame] | 2655 | .connect = xs_connect, |
Chuck Lever | 0210714 | 2006-01-03 09:55:49 +0100 | [diff] [blame] | 2656 | .buf_alloc = rpc_malloc, |
| 2657 | .buf_free = rpc_free, |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 2658 | .send_request = xs_tcp_send_request, |
Chuck Lever | fe3aca2 | 2005-08-25 16:25:50 -0700 | [diff] [blame] | 2659 | .set_retrans_timeout = xprt_set_retrans_timeout_def, |
Trond Myklebust | c627d31 | 2015-02-10 11:06:04 -0500 | [diff] [blame] | 2660 | .close = xs_tcp_shutdown, |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 2661 | .destroy = xs_destroy, |
Chuck Lever | 262ca07 | 2006-03-20 13:44:16 -0500 | [diff] [blame] | 2662 | .print_stats = xs_tcp_print_stats, |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 2663 | .enable_swap = xs_enable_swap, |
| 2664 | .disable_swap = xs_disable_swap, |
Chuck Lever | 4a06825 | 2015-05-11 14:02:25 -0400 | [diff] [blame] | 2665 | .inject_disconnect = xs_inject_disconnect, |
Chuck Lever | 42e5c3e | 2015-10-24 17:27:35 -0400 | [diff] [blame] | 2666 | #ifdef CONFIG_SUNRPC_BACKCHANNEL |
| 2667 | .bc_setup = xprt_setup_bc, |
Chuck Lever | 7656677 | 2015-10-24 17:28:32 -0400 | [diff] [blame] | 2668 | .bc_up = xs_tcp_bc_up, |
Chuck Lever | 6b26cc8 | 2016-05-02 14:40:40 -0400 | [diff] [blame] | 2669 | .bc_maxpayload = xs_tcp_bc_maxpayload, |
Chuck Lever | 42e5c3e | 2015-10-24 17:27:35 -0400 | [diff] [blame] | 2670 | .bc_free_rqst = xprt_free_bc_rqst, |
| 2671 | .bc_destroy = xprt_destroy_bc, |
| 2672 | #endif |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2673 | }; |
| 2674 | |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2675 | /* |
| 2676 | * The rpc_xprt_ops for the server backchannel |
| 2677 | */ |
| 2678 | |
| 2679 | static struct rpc_xprt_ops bc_tcp_ops = { |
| 2680 | .reserve_xprt = xprt_reserve_xprt, |
| 2681 | .release_xprt = xprt_release_xprt, |
Bryan Schumaker | 84e28a3 | 2012-09-24 13:39:01 -0400 | [diff] [blame] | 2682 | .alloc_slot = xprt_alloc_slot, |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2683 | .buf_alloc = bc_malloc, |
| 2684 | .buf_free = bc_free, |
| 2685 | .send_request = bc_send_request, |
| 2686 | .set_retrans_timeout = xprt_set_retrans_timeout_def, |
| 2687 | .close = bc_close, |
| 2688 | .destroy = bc_destroy, |
| 2689 | .print_stats = xs_tcp_print_stats, |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 2690 | .enable_swap = xs_enable_swap, |
| 2691 | .disable_swap = xs_disable_swap, |
Chuck Lever | 4a06825 | 2015-05-11 14:02:25 -0400 | [diff] [blame] | 2692 | .inject_disconnect = xs_inject_disconnect, |
Rahul Iyer | 4cfc7e6 | 2009-09-10 17:32:28 +0300 | [diff] [blame] | 2693 | }; |
| 2694 | |
Chuck Lever | 9247685 | 2010-10-20 11:53:01 -0400 | [diff] [blame] | 2695 | static int xs_init_anyaddr(const int family, struct sockaddr *sap) |
| 2696 | { |
| 2697 | static const struct sockaddr_in sin = { |
| 2698 | .sin_family = AF_INET, |
| 2699 | .sin_addr.s_addr = htonl(INADDR_ANY), |
| 2700 | }; |
| 2701 | static const struct sockaddr_in6 sin6 = { |
| 2702 | .sin6_family = AF_INET6, |
| 2703 | .sin6_addr = IN6ADDR_ANY_INIT, |
| 2704 | }; |
| 2705 | |
| 2706 | switch (family) { |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2707 | case AF_LOCAL: |
| 2708 | break; |
Chuck Lever | 9247685 | 2010-10-20 11:53:01 -0400 | [diff] [blame] | 2709 | case AF_INET: |
| 2710 | memcpy(sap, &sin, sizeof(sin)); |
| 2711 | break; |
| 2712 | case AF_INET6: |
| 2713 | memcpy(sap, &sin6, sizeof(sin6)); |
| 2714 | break; |
| 2715 | default: |
| 2716 | dprintk("RPC: %s: Bad address family\n", __func__); |
| 2717 | return -EAFNOSUPPORT; |
| 2718 | } |
| 2719 | return 0; |
| 2720 | } |
| 2721 | |
\"Talpey, Thomas\ | 3c341b0b | 2007-09-10 13:47:07 -0400 | [diff] [blame] | 2722 | static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args, |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 2723 | unsigned int slot_table_size, |
| 2724 | unsigned int max_slot_table_size) |
Chuck Lever | c8541ec | 2006-10-17 14:44:27 -0400 | [diff] [blame] | 2725 | { |
| 2726 | struct rpc_xprt *xprt; |
Chuck Lever | ffc2e51 | 2006-12-05 16:35:11 -0500 | [diff] [blame] | 2727 | struct sock_xprt *new; |
Chuck Lever | c8541ec | 2006-10-17 14:44:27 -0400 | [diff] [blame] | 2728 | |
Frank van Maarseveen | 96802a0 | 2007-07-08 13:08:54 +0200 | [diff] [blame] | 2729 | if (args->addrlen > sizeof(xprt->addr)) { |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 2730 | dprintk("RPC: xs_setup_xprt: address too large\n"); |
Chuck Lever | c8541ec | 2006-10-17 14:44:27 -0400 | [diff] [blame] | 2731 | return ERR_PTR(-EBADF); |
| 2732 | } |
| 2733 | |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 2734 | xprt = xprt_alloc(args->net, sizeof(*new), slot_table_size, |
| 2735 | max_slot_table_size); |
Pavel Emelyanov | bd1722d | 2010-09-29 16:02:43 +0400 | [diff] [blame] | 2736 | if (xprt == NULL) { |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 2737 | dprintk("RPC: xs_setup_xprt: couldn't allocate " |
| 2738 | "rpc_xprt\n"); |
Chuck Lever | c8541ec | 2006-10-17 14:44:27 -0400 | [diff] [blame] | 2739 | return ERR_PTR(-ENOMEM); |
| 2740 | } |
| 2741 | |
Pavel Emelyanov | bd1722d | 2010-09-29 16:02:43 +0400 | [diff] [blame] | 2742 | new = container_of(xprt, struct sock_xprt, xprt); |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 2743 | mutex_init(&new->recv_mutex); |
Frank van Maarseveen | 96802a0 | 2007-07-08 13:08:54 +0200 | [diff] [blame] | 2744 | memcpy(&xprt->addr, args->dstaddr, args->addrlen); |
| 2745 | xprt->addrlen = args->addrlen; |
Frank van Maarseveen | d3bc9a1 | 2007-07-09 22:23:35 +0200 | [diff] [blame] | 2746 | if (args->srcaddr) |
Chuck Lever | fbfffbd | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2747 | memcpy(&new->srcaddr, args->srcaddr, args->addrlen); |
Chuck Lever | 9247685 | 2010-10-20 11:53:01 -0400 | [diff] [blame] | 2748 | else { |
| 2749 | int err; |
| 2750 | err = xs_init_anyaddr(args->dstaddr->sa_family, |
| 2751 | (struct sockaddr *)&new->srcaddr); |
Stanislav Kinsbursky | 2aa1353 | 2011-11-10 14:33:23 +0300 | [diff] [blame] | 2752 | if (err != 0) { |
| 2753 | xprt_free(xprt); |
Chuck Lever | 9247685 | 2010-10-20 11:53:01 -0400 | [diff] [blame] | 2754 | return ERR_PTR(err); |
Stanislav Kinsbursky | 2aa1353 | 2011-11-10 14:33:23 +0300 | [diff] [blame] | 2755 | } |
Chuck Lever | 9247685 | 2010-10-20 11:53:01 -0400 | [diff] [blame] | 2756 | } |
Chuck Lever | c8541ec | 2006-10-17 14:44:27 -0400 | [diff] [blame] | 2757 | |
| 2758 | return xprt; |
| 2759 | } |
| 2760 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2761 | static const struct rpc_timeout xs_local_default_timeout = { |
| 2762 | .to_initval = 10 * HZ, |
| 2763 | .to_maxval = 10 * HZ, |
| 2764 | .to_retries = 2, |
| 2765 | }; |
| 2766 | |
| 2767 | /** |
| 2768 | * xs_setup_local - Set up transport to use an AF_LOCAL socket |
| 2769 | * @args: rpc transport creation arguments |
| 2770 | * |
| 2771 | * AF_LOCAL is a "tpi_cots_ord" transport, just like TCP |
| 2772 | */ |
| 2773 | static struct rpc_xprt *xs_setup_local(struct xprt_create *args) |
| 2774 | { |
| 2775 | struct sockaddr_un *sun = (struct sockaddr_un *)args->dstaddr; |
| 2776 | struct sock_xprt *transport; |
| 2777 | struct rpc_xprt *xprt; |
| 2778 | struct rpc_xprt *ret; |
| 2779 | |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 2780 | xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries, |
| 2781 | xprt_max_tcp_slot_table_entries); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2782 | if (IS_ERR(xprt)) |
| 2783 | return xprt; |
| 2784 | transport = container_of(xprt, struct sock_xprt, xprt); |
| 2785 | |
| 2786 | xprt->prot = 0; |
| 2787 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); |
| 2788 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; |
| 2789 | |
| 2790 | xprt->bind_timeout = XS_BIND_TO; |
| 2791 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; |
| 2792 | xprt->idle_timeout = XS_IDLE_DISC_TO; |
| 2793 | |
| 2794 | xprt->ops = &xs_local_ops; |
| 2795 | xprt->timeout = &xs_local_default_timeout; |
| 2796 | |
Trond Myklebust | a264809 | 2015-10-06 17:03:00 -0400 | [diff] [blame] | 2797 | INIT_WORK(&transport->recv_worker, xs_local_data_receive_workfn); |
NeilBrown | 93dc41b | 2013-10-31 16:14:36 +1100 | [diff] [blame] | 2798 | INIT_DELAYED_WORK(&transport->connect_worker, |
| 2799 | xs_dummy_setup_socket); |
| 2800 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2801 | switch (sun->sun_family) { |
| 2802 | case AF_LOCAL: |
| 2803 | if (sun->sun_path[0] != '/') { |
| 2804 | dprintk("RPC: bad AF_LOCAL address: %s\n", |
| 2805 | sun->sun_path); |
| 2806 | ret = ERR_PTR(-EINVAL); |
| 2807 | goto out_err; |
| 2808 | } |
| 2809 | xprt_set_bound(xprt); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2810 | xs_format_peer_addresses(xprt, "local", RPCBIND_NETID_LOCAL); |
J. Bruce Fields | 7073ea8 | 2013-02-21 10:14:22 -0500 | [diff] [blame] | 2811 | ret = ERR_PTR(xs_local_setup_socket(transport)); |
| 2812 | if (ret) |
| 2813 | goto out_err; |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2814 | break; |
| 2815 | default: |
| 2816 | ret = ERR_PTR(-EAFNOSUPPORT); |
| 2817 | goto out_err; |
| 2818 | } |
| 2819 | |
| 2820 | dprintk("RPC: set up xprt to %s via AF_LOCAL\n", |
| 2821 | xprt->address_strings[RPC_DISPLAY_ADDR]); |
| 2822 | |
| 2823 | if (try_module_get(THIS_MODULE)) |
| 2824 | return xprt; |
| 2825 | ret = ERR_PTR(-EINVAL); |
| 2826 | out_err: |
Kinglong Mee | 315f381 | 2014-03-24 11:07:22 +0800 | [diff] [blame] | 2827 | xs_xprt_free(xprt); |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 2828 | return ret; |
| 2829 | } |
| 2830 | |
Trond Myklebust | 2881ae7 | 2007-12-20 16:03:54 -0500 | [diff] [blame] | 2831 | static const struct rpc_timeout xs_udp_default_timeout = { |
| 2832 | .to_initval = 5 * HZ, |
| 2833 | .to_maxval = 30 * HZ, |
| 2834 | .to_increment = 5 * HZ, |
| 2835 | .to_retries = 5, |
| 2836 | }; |
| 2837 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 2838 | /** |
| 2839 | * xs_setup_udp - Set up transport to use a UDP socket |
Frank van Maarseveen | 96802a0 | 2007-07-08 13:08:54 +0200 | [diff] [blame] | 2840 | * @args: rpc transport creation arguments |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 2841 | * |
| 2842 | */ |
Adrian Bunk | 483066d | 2007-10-24 18:24:02 +0200 | [diff] [blame] | 2843 | static struct rpc_xprt *xs_setup_udp(struct xprt_create *args) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2844 | { |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2845 | struct sockaddr *addr = args->dstaddr; |
Chuck Lever | c8541ec | 2006-10-17 14:44:27 -0400 | [diff] [blame] | 2846 | struct rpc_xprt *xprt; |
Chuck Lever | c847546 | 2006-12-05 16:35:26 -0500 | [diff] [blame] | 2847 | struct sock_xprt *transport; |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 2848 | struct rpc_xprt *ret; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2849 | |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 2850 | xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries, |
| 2851 | xprt_udp_slot_table_entries); |
Chuck Lever | c8541ec | 2006-10-17 14:44:27 -0400 | [diff] [blame] | 2852 | if (IS_ERR(xprt)) |
| 2853 | return xprt; |
Chuck Lever | c847546 | 2006-12-05 16:35:26 -0500 | [diff] [blame] | 2854 | transport = container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2855 | |
Chuck Lever | ec739ef | 2006-08-22 20:06:15 -0400 | [diff] [blame] | 2856 | xprt->prot = IPPROTO_UDP; |
Chuck Lever | 808012f | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 2857 | xprt->tsh_size = 0; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2858 | /* XXX: header size can vary due to auth type, IPv6, etc. */ |
| 2859 | xprt->max_payload = (1U << 16) - (MAX_HEADER << 3); |
| 2860 | |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2861 | xprt->bind_timeout = XS_BIND_TO; |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2862 | xprt->reestablish_timeout = XS_UDP_REEST_TO; |
| 2863 | xprt->idle_timeout = XS_IDLE_DISC_TO; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2864 | |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 2865 | xprt->ops = &xs_udp_ops; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2866 | |
Trond Myklebust | ba7392b | 2007-12-20 16:03:55 -0500 | [diff] [blame] | 2867 | xprt->timeout = &xs_udp_default_timeout; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2868 | |
Trond Myklebust | f9b2ee7 | 2015-10-06 16:26:05 -0400 | [diff] [blame] | 2869 | INIT_WORK(&transport->recv_worker, xs_udp_data_receive_workfn); |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 2870 | INIT_DELAYED_WORK(&transport->connect_worker, xs_udp_setup_socket); |
| 2871 | |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2872 | switch (addr->sa_family) { |
| 2873 | case AF_INET: |
| 2874 | if (((struct sockaddr_in *)addr)->sin_port != htons(0)) |
| 2875 | xprt_set_bound(xprt); |
| 2876 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2877 | xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP); |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2878 | break; |
| 2879 | case AF_INET6: |
| 2880 | if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0)) |
| 2881 | xprt_set_bound(xprt); |
| 2882 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2883 | xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP6); |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2884 | break; |
| 2885 | default: |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 2886 | ret = ERR_PTR(-EAFNOSUPPORT); |
| 2887 | goto out_err; |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2888 | } |
| 2889 | |
Chuck Lever | c740eff | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2890 | if (xprt_bound(xprt)) |
| 2891 | dprintk("RPC: set up xprt to %s (port %s) via %s\n", |
| 2892 | xprt->address_strings[RPC_DISPLAY_ADDR], |
| 2893 | xprt->address_strings[RPC_DISPLAY_PORT], |
| 2894 | xprt->address_strings[RPC_DISPLAY_PROTO]); |
| 2895 | else |
| 2896 | dprintk("RPC: set up xprt to %s (autobind) via %s\n", |
| 2897 | xprt->address_strings[RPC_DISPLAY_ADDR], |
| 2898 | xprt->address_strings[RPC_DISPLAY_PROTO]); |
Chuck Lever | edb267a | 2006-08-22 20:06:18 -0400 | [diff] [blame] | 2899 | |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 2900 | if (try_module_get(THIS_MODULE)) |
| 2901 | return xprt; |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 2902 | ret = ERR_PTR(-EINVAL); |
| 2903 | out_err: |
Kinglong Mee | 315f381 | 2014-03-24 11:07:22 +0800 | [diff] [blame] | 2904 | xs_xprt_free(xprt); |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 2905 | return ret; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2906 | } |
| 2907 | |
Trond Myklebust | 2881ae7 | 2007-12-20 16:03:54 -0500 | [diff] [blame] | 2908 | static const struct rpc_timeout xs_tcp_default_timeout = { |
| 2909 | .to_initval = 60 * HZ, |
| 2910 | .to_maxval = 60 * HZ, |
| 2911 | .to_retries = 2, |
| 2912 | }; |
| 2913 | |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 2914 | /** |
| 2915 | * xs_setup_tcp - Set up transport to use a TCP socket |
Frank van Maarseveen | 96802a0 | 2007-07-08 13:08:54 +0200 | [diff] [blame] | 2916 | * @args: rpc transport creation arguments |
Chuck Lever | 9903cd1 | 2005-08-11 16:25:26 -0400 | [diff] [blame] | 2917 | * |
| 2918 | */ |
Adrian Bunk | 483066d | 2007-10-24 18:24:02 +0200 | [diff] [blame] | 2919 | static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args) |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2920 | { |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2921 | struct sockaddr *addr = args->dstaddr; |
Chuck Lever | c8541ec | 2006-10-17 14:44:27 -0400 | [diff] [blame] | 2922 | struct rpc_xprt *xprt; |
Chuck Lever | c847546 | 2006-12-05 16:35:26 -0500 | [diff] [blame] | 2923 | struct sock_xprt *transport; |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 2924 | struct rpc_xprt *ret; |
Trond Myklebust | b7993ce | 2013-04-14 11:42:00 -0400 | [diff] [blame] | 2925 | unsigned int max_slot_table_size = xprt_max_tcp_slot_table_entries; |
| 2926 | |
| 2927 | if (args->flags & XPRT_CREATE_INFINITE_SLOTS) |
| 2928 | max_slot_table_size = RPC_MAX_SLOT_TABLE_LIMIT; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2929 | |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 2930 | xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries, |
Trond Myklebust | b7993ce | 2013-04-14 11:42:00 -0400 | [diff] [blame] | 2931 | max_slot_table_size); |
Chuck Lever | c8541ec | 2006-10-17 14:44:27 -0400 | [diff] [blame] | 2932 | if (IS_ERR(xprt)) |
| 2933 | return xprt; |
Chuck Lever | c847546 | 2006-12-05 16:35:26 -0500 | [diff] [blame] | 2934 | transport = container_of(xprt, struct sock_xprt, xprt); |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2935 | |
Chuck Lever | ec739ef | 2006-08-22 20:06:15 -0400 | [diff] [blame] | 2936 | xprt->prot = IPPROTO_TCP; |
Chuck Lever | 808012f | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 2937 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); |
Chuck Lever | 808012f | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 2938 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2939 | |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2940 | xprt->bind_timeout = XS_BIND_TO; |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 2941 | xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; |
| 2942 | xprt->idle_timeout = XS_IDLE_DISC_TO; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2943 | |
Chuck Lever | 262965f | 2005-08-11 16:25:56 -0400 | [diff] [blame] | 2944 | xprt->ops = &xs_tcp_ops; |
Trond Myklebust | ba7392b | 2007-12-20 16:03:55 -0500 | [diff] [blame] | 2945 | xprt->timeout = &xs_tcp_default_timeout; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2946 | |
Trond Myklebust | edc1b01 | 2015-10-05 10:53:49 -0400 | [diff] [blame] | 2947 | INIT_WORK(&transport->recv_worker, xs_tcp_data_receive_workfn); |
| 2948 | INIT_DELAYED_WORK(&transport->connect_worker, xs_tcp_setup_socket); |
| 2949 | |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2950 | switch (addr->sa_family) { |
| 2951 | case AF_INET: |
| 2952 | if (((struct sockaddr_in *)addr)->sin_port != htons(0)) |
| 2953 | xprt_set_bound(xprt); |
| 2954 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2955 | xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP); |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2956 | break; |
| 2957 | case AF_INET6: |
| 2958 | if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0)) |
| 2959 | xprt_set_bound(xprt); |
| 2960 | |
Chuck Lever | 9dc3b09 | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2961 | xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP6); |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2962 | break; |
| 2963 | default: |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 2964 | ret = ERR_PTR(-EAFNOSUPPORT); |
| 2965 | goto out_err; |
Chuck Lever | 8f9d5b1 | 2007-08-06 11:57:53 -0400 | [diff] [blame] | 2966 | } |
| 2967 | |
Chuck Lever | c740eff | 2009-08-09 15:09:46 -0400 | [diff] [blame] | 2968 | if (xprt_bound(xprt)) |
| 2969 | dprintk("RPC: set up xprt to %s (port %s) via %s\n", |
| 2970 | xprt->address_strings[RPC_DISPLAY_ADDR], |
| 2971 | xprt->address_strings[RPC_DISPLAY_PORT], |
| 2972 | xprt->address_strings[RPC_DISPLAY_PROTO]); |
| 2973 | else |
| 2974 | dprintk("RPC: set up xprt to %s (autobind) via %s\n", |
| 2975 | xprt->address_strings[RPC_DISPLAY_ADDR], |
| 2976 | xprt->address_strings[RPC_DISPLAY_PROTO]); |
| 2977 | |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 2978 | if (try_module_get(THIS_MODULE)) |
| 2979 | return xprt; |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 2980 | ret = ERR_PTR(-EINVAL); |
| 2981 | out_err: |
Kinglong Mee | 315f381 | 2014-03-24 11:07:22 +0800 | [diff] [blame] | 2982 | xs_xprt_free(xprt); |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 2983 | return ret; |
Chuck Lever | a246b01 | 2005-08-11 16:25:23 -0400 | [diff] [blame] | 2984 | } |
Chuck Lever | 282b32e | 2006-12-05 16:35:51 -0500 | [diff] [blame] | 2985 | |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 2986 | /** |
| 2987 | * xs_setup_bc_tcp - Set up transport to use a TCP backchannel socket |
| 2988 | * @args: rpc transport creation arguments |
| 2989 | * |
| 2990 | */ |
| 2991 | static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args) |
| 2992 | { |
| 2993 | struct sockaddr *addr = args->dstaddr; |
| 2994 | struct rpc_xprt *xprt; |
| 2995 | struct sock_xprt *transport; |
| 2996 | struct svc_sock *bc_sock; |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 2997 | struct rpc_xprt *ret; |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 2998 | |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 2999 | xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries, |
| 3000 | xprt_tcp_slot_table_entries); |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3001 | if (IS_ERR(xprt)) |
| 3002 | return xprt; |
| 3003 | transport = container_of(xprt, struct sock_xprt, xprt); |
| 3004 | |
| 3005 | xprt->prot = IPPROTO_TCP; |
| 3006 | xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); |
| 3007 | xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; |
| 3008 | xprt->timeout = &xs_tcp_default_timeout; |
| 3009 | |
| 3010 | /* backchannel */ |
| 3011 | xprt_set_bound(xprt); |
| 3012 | xprt->bind_timeout = 0; |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3013 | xprt->reestablish_timeout = 0; |
| 3014 | xprt->idle_timeout = 0; |
| 3015 | |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3016 | xprt->ops = &bc_tcp_ops; |
| 3017 | |
| 3018 | switch (addr->sa_family) { |
| 3019 | case AF_INET: |
| 3020 | xs_format_peer_addresses(xprt, "tcp", |
| 3021 | RPCBIND_NETID_TCP); |
| 3022 | break; |
| 3023 | case AF_INET6: |
| 3024 | xs_format_peer_addresses(xprt, "tcp", |
| 3025 | RPCBIND_NETID_TCP6); |
| 3026 | break; |
| 3027 | default: |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 3028 | ret = ERR_PTR(-EAFNOSUPPORT); |
| 3029 | goto out_err; |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3030 | } |
| 3031 | |
Pavel Emelyanov | 50fa0d4 | 2010-10-05 20:49:35 +0400 | [diff] [blame] | 3032 | dprintk("RPC: set up xprt to %s (port %s) via %s\n", |
| 3033 | xprt->address_strings[RPC_DISPLAY_ADDR], |
| 3034 | xprt->address_strings[RPC_DISPLAY_PORT], |
| 3035 | xprt->address_strings[RPC_DISPLAY_PROTO]); |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3036 | |
| 3037 | /* |
J. Bruce Fields | 99de8ea | 2010-12-08 12:45:44 -0500 | [diff] [blame] | 3038 | * Once we've associated a backchannel xprt with a connection, |
Weng Meiling | 28303ca | 2013-11-30 17:56:44 +0800 | [diff] [blame] | 3039 | * we want to keep it around as long as the connection lasts, |
| 3040 | * in case we need to start using it for a backchannel again; |
| 3041 | * this reference won't be dropped until bc_xprt is destroyed. |
J. Bruce Fields | 99de8ea | 2010-12-08 12:45:44 -0500 | [diff] [blame] | 3042 | */ |
| 3043 | xprt_get(xprt); |
| 3044 | args->bc_xprt->xpt_bc_xprt = xprt; |
| 3045 | xprt->bc_xprt = args->bc_xprt; |
| 3046 | bc_sock = container_of(args->bc_xprt, struct svc_sock, sk_xprt); |
| 3047 | transport->sock = bc_sock->sk_sock; |
| 3048 | transport->inet = bc_sock->sk_sk; |
| 3049 | |
| 3050 | /* |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3051 | * Since we don't want connections for the backchannel, we set |
| 3052 | * the xprt status to connected |
| 3053 | */ |
| 3054 | xprt_set_connected(xprt); |
| 3055 | |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3056 | if (try_module_get(THIS_MODULE)) |
| 3057 | return xprt; |
Kinglong Mee | 642aab5 | 2014-03-24 12:00:28 +0800 | [diff] [blame] | 3058 | |
| 3059 | args->bc_xprt->xpt_bc_xprt = NULL; |
J. Bruce Fields | 39a9bea | 2016-05-17 12:38:21 -0400 | [diff] [blame] | 3060 | args->bc_xprt->xpt_bc_xps = NULL; |
J. Bruce Fields | 99de8ea | 2010-12-08 12:45:44 -0500 | [diff] [blame] | 3061 | xprt_put(xprt); |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 3062 | ret = ERR_PTR(-EINVAL); |
| 3063 | out_err: |
Kinglong Mee | 315f381 | 2014-03-24 11:07:22 +0800 | [diff] [blame] | 3064 | xs_xprt_free(xprt); |
J. Bruce Fields | 0a68b0b | 2010-05-26 08:42:24 -0400 | [diff] [blame] | 3065 | return ret; |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3066 | } |
| 3067 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 3068 | static struct xprt_class xs_local_transport = { |
| 3069 | .list = LIST_HEAD_INIT(xs_local_transport.list), |
| 3070 | .name = "named UNIX socket", |
| 3071 | .owner = THIS_MODULE, |
| 3072 | .ident = XPRT_TRANSPORT_LOCAL, |
| 3073 | .setup = xs_setup_local, |
| 3074 | }; |
| 3075 | |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 3076 | static struct xprt_class xs_udp_transport = { |
| 3077 | .list = LIST_HEAD_INIT(xs_udp_transport.list), |
| 3078 | .name = "udp", |
| 3079 | .owner = THIS_MODULE, |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3080 | .ident = XPRT_TRANSPORT_UDP, |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 3081 | .setup = xs_setup_udp, |
| 3082 | }; |
| 3083 | |
| 3084 | static struct xprt_class xs_tcp_transport = { |
| 3085 | .list = LIST_HEAD_INIT(xs_tcp_transport.list), |
| 3086 | .name = "tcp", |
| 3087 | .owner = THIS_MODULE, |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3088 | .ident = XPRT_TRANSPORT_TCP, |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 3089 | .setup = xs_setup_tcp, |
| 3090 | }; |
| 3091 | |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3092 | static struct xprt_class xs_bc_tcp_transport = { |
| 3093 | .list = LIST_HEAD_INIT(xs_bc_tcp_transport.list), |
| 3094 | .name = "tcp NFSv4.1 backchannel", |
| 3095 | .owner = THIS_MODULE, |
| 3096 | .ident = XPRT_TRANSPORT_BC_TCP, |
| 3097 | .setup = xs_setup_bc_tcp, |
| 3098 | }; |
| 3099 | |
Chuck Lever | 282b32e | 2006-12-05 16:35:51 -0500 | [diff] [blame] | 3100 | /** |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 3101 | * init_socket_xprt - set up xprtsock's sysctls, register with RPC client |
Chuck Lever | 282b32e | 2006-12-05 16:35:51 -0500 | [diff] [blame] | 3102 | * |
| 3103 | */ |
| 3104 | int init_socket_xprt(void) |
| 3105 | { |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame] | 3106 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
Eric W. Biederman | 2b1bec5 | 2007-02-14 00:33:24 -0800 | [diff] [blame] | 3107 | if (!sunrpc_table_header) |
Eric W. Biederman | 0b4d414 | 2007-02-14 00:34:09 -0800 | [diff] [blame] | 3108 | sunrpc_table_header = register_sysctl_table(sunrpc_table); |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 3109 | #endif |
| 3110 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 3111 | xprt_register_transport(&xs_local_transport); |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 3112 | xprt_register_transport(&xs_udp_transport); |
| 3113 | xprt_register_transport(&xs_tcp_transport); |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3114 | xprt_register_transport(&xs_bc_tcp_transport); |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 3115 | |
Chuck Lever | 282b32e | 2006-12-05 16:35:51 -0500 | [diff] [blame] | 3116 | return 0; |
| 3117 | } |
| 3118 | |
| 3119 | /** |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 3120 | * cleanup_socket_xprt - remove xprtsock's sysctls, unregister |
Chuck Lever | 282b32e | 2006-12-05 16:35:51 -0500 | [diff] [blame] | 3121 | * |
| 3122 | */ |
| 3123 | void cleanup_socket_xprt(void) |
| 3124 | { |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame] | 3125 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
Chuck Lever | fbf7668 | 2006-12-05 16:35:54 -0500 | [diff] [blame] | 3126 | if (sunrpc_table_header) { |
| 3127 | unregister_sysctl_table(sunrpc_table_header); |
| 3128 | sunrpc_table_header = NULL; |
| 3129 | } |
| 3130 | #endif |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 3131 | |
Chuck Lever | 176e21e | 2011-05-09 15:22:44 -0400 | [diff] [blame] | 3132 | xprt_unregister_transport(&xs_local_transport); |
\"Talpey, Thomas\ | bc25571 | 2007-09-10 13:46:39 -0400 | [diff] [blame] | 3133 | xprt_unregister_transport(&xs_udp_transport); |
| 3134 | xprt_unregister_transport(&xs_tcp_transport); |
Alexandros Batsakis | f300bab | 2009-09-10 17:33:30 +0300 | [diff] [blame] | 3135 | xprt_unregister_transport(&xs_bc_tcp_transport); |
Chuck Lever | 282b32e | 2006-12-05 16:35:51 -0500 | [diff] [blame] | 3136 | } |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3137 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 3138 | static int param_set_uint_minmax(const char *val, |
| 3139 | const struct kernel_param *kp, |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3140 | unsigned int min, unsigned int max) |
| 3141 | { |
Daniel Walter | 00cfaa9 | 2014-06-21 13:06:38 +0100 | [diff] [blame] | 3142 | unsigned int num; |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3143 | int ret; |
| 3144 | |
| 3145 | if (!val) |
| 3146 | return -EINVAL; |
Daniel Walter | 00cfaa9 | 2014-06-21 13:06:38 +0100 | [diff] [blame] | 3147 | ret = kstrtouint(val, 0, &num); |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3148 | if (ret == -EINVAL || num < min || num > max) |
| 3149 | return -EINVAL; |
| 3150 | *((unsigned int *)kp->arg) = num; |
| 3151 | return 0; |
| 3152 | } |
| 3153 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 3154 | static int param_set_portnr(const char *val, const struct kernel_param *kp) |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3155 | { |
| 3156 | return param_set_uint_minmax(val, kp, |
| 3157 | RPC_MIN_RESVPORT, |
| 3158 | RPC_MAX_RESVPORT); |
| 3159 | } |
| 3160 | |
Luis R. Rodriguez | 9c27847 | 2015-05-27 11:09:38 +0930 | [diff] [blame] | 3161 | static const struct kernel_param_ops param_ops_portnr = { |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 3162 | .set = param_set_portnr, |
| 3163 | .get = param_get_uint, |
| 3164 | }; |
| 3165 | |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3166 | #define param_check_portnr(name, p) \ |
| 3167 | __param_check(name, p, unsigned int); |
| 3168 | |
| 3169 | module_param_named(min_resvport, xprt_min_resvport, portnr, 0644); |
| 3170 | module_param_named(max_resvport, xprt_max_resvport, portnr, 0644); |
| 3171 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 3172 | static int param_set_slot_table_size(const char *val, |
| 3173 | const struct kernel_param *kp) |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3174 | { |
| 3175 | return param_set_uint_minmax(val, kp, |
| 3176 | RPC_MIN_SLOT_TABLE, |
| 3177 | RPC_MAX_SLOT_TABLE); |
| 3178 | } |
| 3179 | |
Luis R. Rodriguez | 9c27847 | 2015-05-27 11:09:38 +0930 | [diff] [blame] | 3180 | static const struct kernel_param_ops param_ops_slot_table_size = { |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 3181 | .set = param_set_slot_table_size, |
| 3182 | .get = param_get_uint, |
| 3183 | }; |
| 3184 | |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3185 | #define param_check_slot_table_size(name, p) \ |
| 3186 | __param_check(name, p, unsigned int); |
| 3187 | |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 3188 | static int param_set_max_slot_table_size(const char *val, |
| 3189 | const struct kernel_param *kp) |
| 3190 | { |
| 3191 | return param_set_uint_minmax(val, kp, |
| 3192 | RPC_MIN_SLOT_TABLE, |
| 3193 | RPC_MAX_SLOT_TABLE_LIMIT); |
| 3194 | } |
| 3195 | |
Luis R. Rodriguez | 9c27847 | 2015-05-27 11:09:38 +0930 | [diff] [blame] | 3196 | static const struct kernel_param_ops param_ops_max_slot_table_size = { |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 3197 | .set = param_set_max_slot_table_size, |
| 3198 | .get = param_get_uint, |
| 3199 | }; |
| 3200 | |
| 3201 | #define param_check_max_slot_table_size(name, p) \ |
| 3202 | __param_check(name, p, unsigned int); |
| 3203 | |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3204 | module_param_named(tcp_slot_table_entries, xprt_tcp_slot_table_entries, |
| 3205 | slot_table_size, 0644); |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 3206 | module_param_named(tcp_max_slot_table_entries, xprt_max_tcp_slot_table_entries, |
| 3207 | max_slot_table_size, 0644); |
Trond Myklebust | cbf1107 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 3208 | module_param_named(udp_slot_table_entries, xprt_udp_slot_table_entries, |
| 3209 | slot_table_size, 0644); |
| 3210 | |