clnt_rc.c (178112) | clnt_rc.c (180025) |
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1/*- 2 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 3 * Authors: Doug Rabson <dfr@rabson.org> 4 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: --- 12 unchanged lines hidden (view full) --- 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 3 * Authors: Doug Rabson <dfr@rabson.org> 4 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: --- 12 unchanged lines hidden (view full) --- 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> |
29__FBSDID("$FreeBSD: head/sys/rpc/clnt_rc.c 178112 2008-04-11 10:34:59Z dfr $"); | 29__FBSDID("$FreeBSD: head/sys/rpc/clnt_rc.c 180025 2008-06-26 10:21:54Z dfr $"); |
30 31#include <sys/param.h> 32#include <sys/systm.h> | 30 31#include <sys/param.h> 32#include <sys/systm.h> |
33#include <sys/limits.h> |
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33#include <sys/lock.h> 34#include <sys/malloc.h> 35#include <sys/mbuf.h> 36#include <sys/mutex.h> 37#include <sys/pcpu.h> 38#include <sys/proc.h> 39#include <sys/socket.h> 40#include <sys/socketvar.h> 41#include <sys/time.h> 42#include <sys/uio.h> 43 44#include <rpc/rpc.h> 45#include <rpc/rpc_com.h> 46 | 34#include <sys/lock.h> 35#include <sys/malloc.h> 36#include <sys/mbuf.h> 37#include <sys/mutex.h> 38#include <sys/pcpu.h> 39#include <sys/proc.h> 40#include <sys/socket.h> 41#include <sys/socketvar.h> 42#include <sys/time.h> 43#include <sys/uio.h> 44 45#include <rpc/rpc.h> 46#include <rpc/rpc_com.h> 47 |
47static enum clnt_stat clnt_reconnect_call(CLIENT *, rpcproc_t, 48 xdrproc_t, void *, xdrproc_t, void *, struct timeval); | 48static enum clnt_stat clnt_reconnect_call(CLIENT *, struct rpc_callextra *, 49 rpcproc_t, xdrproc_t, void *, xdrproc_t, void *, struct timeval); |
49static void clnt_reconnect_geterr(CLIENT *, struct rpc_err *); 50static bool_t clnt_reconnect_freeres(CLIENT *, xdrproc_t, void *); 51static void clnt_reconnect_abort(CLIENT *); 52static bool_t clnt_reconnect_control(CLIENT *, u_int, void *); 53static void clnt_reconnect_destroy(CLIENT *); 54 55static struct clnt_ops clnt_reconnect_ops = { 56 .cl_call = clnt_reconnect_call, 57 .cl_abort = clnt_reconnect_abort, 58 .cl_geterr = clnt_reconnect_geterr, 59 .cl_freeres = clnt_reconnect_freeres, 60 .cl_destroy = clnt_reconnect_destroy, 61 .cl_control = clnt_reconnect_control 62}; 63 64struct rc_data { | 50static void clnt_reconnect_geterr(CLIENT *, struct rpc_err *); 51static bool_t clnt_reconnect_freeres(CLIENT *, xdrproc_t, void *); 52static void clnt_reconnect_abort(CLIENT *); 53static bool_t clnt_reconnect_control(CLIENT *, u_int, void *); 54static void clnt_reconnect_destroy(CLIENT *); 55 56static struct clnt_ops clnt_reconnect_ops = { 57 .cl_call = clnt_reconnect_call, 58 .cl_abort = clnt_reconnect_abort, 59 .cl_geterr = clnt_reconnect_geterr, 60 .cl_freeres = clnt_reconnect_freeres, 61 .cl_destroy = clnt_reconnect_destroy, 62 .cl_control = clnt_reconnect_control 63}; 64 65struct rc_data { |
66 struct mtx rc_lock; |
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65 struct sockaddr_storage rc_addr; /* server address */ 66 struct netconfig* rc_nconf; /* network type */ 67 rpcprog_t rc_prog; /* program number */ 68 rpcvers_t rc_vers; /* version number */ 69 size_t rc_sendsz; 70 size_t rc_recvsz; 71 struct timeval rc_timeout; 72 struct timeval rc_retry; | 67 struct sockaddr_storage rc_addr; /* server address */ 68 struct netconfig* rc_nconf; /* network type */ 69 rpcprog_t rc_prog; /* program number */ 70 rpcvers_t rc_vers; /* version number */ 71 size_t rc_sendsz; 72 size_t rc_recvsz; 73 struct timeval rc_timeout; 74 struct timeval rc_retry; |
75 int rc_retries; |
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73 const char *rc_waitchan; 74 int rc_intr; | 76 const char *rc_waitchan; 77 int rc_intr; |
78 int rc_connecting; |
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75 CLIENT* rc_client; /* underlying RPC client */ 76}; 77 78CLIENT * 79clnt_reconnect_create( 80 struct netconfig *nconf, /* network type */ 81 struct sockaddr *svcaddr, /* servers address */ 82 rpcprog_t program, /* program number */ --- 6 unchanged lines hidden (view full) --- 89 90 if (svcaddr == NULL) { 91 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 92 return (NULL); 93 } 94 95 cl = mem_alloc(sizeof (CLIENT)); 96 rc = mem_alloc(sizeof (*rc)); | 79 CLIENT* rc_client; /* underlying RPC client */ 80}; 81 82CLIENT * 83clnt_reconnect_create( 84 struct netconfig *nconf, /* network type */ 85 struct sockaddr *svcaddr, /* servers address */ 86 rpcprog_t program, /* program number */ --- 6 unchanged lines hidden (view full) --- 93 94 if (svcaddr == NULL) { 95 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 96 return (NULL); 97 } 98 99 cl = mem_alloc(sizeof (CLIENT)); 100 rc = mem_alloc(sizeof (*rc)); |
101 mtx_init(&rc->rc_lock, "rc->rc_lock", NULL, MTX_DEF); |
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97 (void) memcpy(&rc->rc_addr, svcaddr, (size_t)svcaddr->sa_len); 98 rc->rc_nconf = nconf; 99 rc->rc_prog = program; 100 rc->rc_vers = version; 101 rc->rc_sendsz = sendsz; 102 rc->rc_recvsz = recvsz; 103 rc->rc_timeout.tv_sec = -1; 104 rc->rc_timeout.tv_usec = -1; | 102 (void) memcpy(&rc->rc_addr, svcaddr, (size_t)svcaddr->sa_len); 103 rc->rc_nconf = nconf; 104 rc->rc_prog = program; 105 rc->rc_vers = version; 106 rc->rc_sendsz = sendsz; 107 rc->rc_recvsz = recvsz; 108 rc->rc_timeout.tv_sec = -1; 109 rc->rc_timeout.tv_usec = -1; |
105 rc->rc_retry.tv_sec = 15; | 110 rc->rc_retry.tv_sec = 3; |
106 rc->rc_retry.tv_usec = 0; | 111 rc->rc_retry.tv_usec = 0; |
112 rc->rc_retries = INT_MAX; |
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107 rc->rc_waitchan = "rpcrecv"; 108 rc->rc_intr = 0; | 113 rc->rc_waitchan = "rpcrecv"; 114 rc->rc_intr = 0; |
115 rc->rc_connecting = FALSE; |
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109 rc->rc_client = NULL; 110 | 116 rc->rc_client = NULL; 117 |
118 cl->cl_refs = 1; |
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111 cl->cl_ops = &clnt_reconnect_ops; 112 cl->cl_private = (caddr_t)(void *)rc; 113 cl->cl_auth = authnone_create(); 114 cl->cl_tp = NULL; 115 cl->cl_netid = NULL; 116 return (cl); 117} 118 119static enum clnt_stat 120clnt_reconnect_connect(CLIENT *cl) 121{ 122 struct rc_data *rc = (struct rc_data *)cl->cl_private; 123 struct socket *so; | 119 cl->cl_ops = &clnt_reconnect_ops; 120 cl->cl_private = (caddr_t)(void *)rc; 121 cl->cl_auth = authnone_create(); 122 cl->cl_tp = NULL; 123 cl->cl_netid = NULL; 124 return (cl); 125} 126 127static enum clnt_stat 128clnt_reconnect_connect(CLIENT *cl) 129{ 130 struct rc_data *rc = (struct rc_data *)cl->cl_private; 131 struct socket *so; |
132 enum clnt_stat stat; 133 int error; |
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124 int one = 1; 125 | 134 int one = 1; 135 |
136 mtx_lock(&rc->rc_lock); 137again: 138 if (rc->rc_connecting) { 139 while (!rc->rc_client) { 140 error = msleep(rc, &rc->rc_lock, 141 rc->rc_intr ? PCATCH : 0, "rpcrecon", 0); 142 if (error) { 143 mtx_unlock(&rc->rc_lock); 144 return (RPC_INTR); 145 } 146 } 147 /* 148 * If the other guy failed to connect, we might as 149 * well have another go. 150 */ 151 if (!rc->rc_client && !rc->rc_connecting) 152 goto again; 153 mtx_unlock(&rc->rc_lock); 154 return (RPC_SUCCESS); 155 } else { 156 rc->rc_connecting = TRUE; 157 } 158 mtx_unlock(&rc->rc_lock); 159 |
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126 so = __rpc_nconf2socket(rc->rc_nconf); 127 if (!so) { | 160 so = __rpc_nconf2socket(rc->rc_nconf); 161 if (!so) { |
128 rpc_createerr.cf_stat = RPC_TLIERROR; | 162 stat = rpc_createerr.cf_stat = RPC_TLIERROR; |
129 rpc_createerr.cf_error.re_errno = 0; | 163 rpc_createerr.cf_error.re_errno = 0; |
130 return (RPC_TLIERROR); | 164 goto out; |
131 } 132 133 if (rc->rc_nconf->nc_semantics == NC_TPI_CLTS) 134 rc->rc_client = clnt_dg_create(so, 135 (struct sockaddr *) &rc->rc_addr, rc->rc_prog, rc->rc_vers, 136 rc->rc_sendsz, rc->rc_recvsz); 137 else 138 rc->rc_client = clnt_vc_create(so, 139 (struct sockaddr *) &rc->rc_addr, rc->rc_prog, rc->rc_vers, 140 rc->rc_sendsz, rc->rc_recvsz); 141 | 165 } 166 167 if (rc->rc_nconf->nc_semantics == NC_TPI_CLTS) 168 rc->rc_client = clnt_dg_create(so, 169 (struct sockaddr *) &rc->rc_addr, rc->rc_prog, rc->rc_vers, 170 rc->rc_sendsz, rc->rc_recvsz); 171 else 172 rc->rc_client = clnt_vc_create(so, 173 (struct sockaddr *) &rc->rc_addr, rc->rc_prog, rc->rc_vers, 174 rc->rc_sendsz, rc->rc_recvsz); 175 |
142 if (!rc->rc_client) 143 return (rpc_createerr.cf_stat); | 176 if (!rc->rc_client) { 177 stat = rpc_createerr.cf_stat; 178 goto out; 179 } |
144 145 CLNT_CONTROL(rc->rc_client, CLSET_FD_CLOSE, 0); 146 CLNT_CONTROL(rc->rc_client, CLSET_CONNECT, &one); 147 CLNT_CONTROL(rc->rc_client, CLSET_TIMEOUT, &rc->rc_timeout); 148 CLNT_CONTROL(rc->rc_client, CLSET_RETRY_TIMEOUT, &rc->rc_retry); 149 CLNT_CONTROL(rc->rc_client, CLSET_WAITCHAN, &rc->rc_waitchan); 150 CLNT_CONTROL(rc->rc_client, CLSET_INTERRUPTIBLE, &rc->rc_intr); | 180 181 CLNT_CONTROL(rc->rc_client, CLSET_FD_CLOSE, 0); 182 CLNT_CONTROL(rc->rc_client, CLSET_CONNECT, &one); 183 CLNT_CONTROL(rc->rc_client, CLSET_TIMEOUT, &rc->rc_timeout); 184 CLNT_CONTROL(rc->rc_client, CLSET_RETRY_TIMEOUT, &rc->rc_retry); 185 CLNT_CONTROL(rc->rc_client, CLSET_WAITCHAN, &rc->rc_waitchan); 186 CLNT_CONTROL(rc->rc_client, CLSET_INTERRUPTIBLE, &rc->rc_intr); |
187 stat = RPC_SUCCESS; |
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151 | 188 |
152 return (RPC_SUCCESS); | 189out: 190 mtx_lock(&rc->rc_lock); 191 rc->rc_connecting = FALSE; 192 wakeup(rc); 193 mtx_unlock(&rc->rc_lock); 194 195 return (stat); |
153} 154 155static enum clnt_stat 156clnt_reconnect_call( | 196} 197 198static enum clnt_stat 199clnt_reconnect_call( |
157 CLIENT *cl, /* client handle */ | 200 CLIENT *cl, /* client handle */ 201 struct rpc_callextra *ext, /* call metadata */ |
158 rpcproc_t proc, /* procedure number */ 159 xdrproc_t xargs, /* xdr routine for args */ 160 void *argsp, /* pointer to args */ 161 xdrproc_t xresults, /* xdr routine for results */ 162 void *resultsp, /* pointer to results */ 163 struct timeval utimeout) /* seconds to wait before giving up */ 164{ 165 struct rc_data *rc = (struct rc_data *)cl->cl_private; | 202 rpcproc_t proc, /* procedure number */ 203 xdrproc_t xargs, /* xdr routine for args */ 204 void *argsp, /* pointer to args */ 205 xdrproc_t xresults, /* xdr routine for results */ 206 void *resultsp, /* pointer to results */ 207 struct timeval utimeout) /* seconds to wait before giving up */ 208{ 209 struct rc_data *rc = (struct rc_data *)cl->cl_private; |
210 CLIENT *client; |
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166 enum clnt_stat stat; | 211 enum clnt_stat stat; |
212 int tries; |
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167 | 213 |
214 tries = 0; |
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168 do { 169 if (!rc->rc_client) { 170 stat = clnt_reconnect_connect(cl); 171 if (stat != RPC_SUCCESS) 172 return (stat); 173 } 174 | 215 do { 216 if (!rc->rc_client) { 217 stat = clnt_reconnect_connect(cl); 218 if (stat != RPC_SUCCESS) 219 return (stat); 220 } 221 |
175 stat = CLNT_CALL(rc->rc_client, proc, xargs, argsp, | 222 mtx_lock(&rc->rc_lock); 223 CLNT_ACQUIRE(rc->rc_client); 224 client = rc->rc_client; 225 mtx_unlock(&rc->rc_lock); 226 stat = CLNT_CALL_EXT(client, ext, proc, xargs, argsp, |
176 xresults, resultsp, utimeout); 177 | 227 xresults, resultsp, utimeout); 228 |
229 CLNT_RELEASE(client); |
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178 if (stat == RPC_TIMEDOUT) { 179 /* 180 * Check for async send misfeature for NLM 181 * protocol. 182 */ 183 if ((rc->rc_timeout.tv_sec == 0 184 && rc->rc_timeout.tv_usec == 0) 185 || (rc->rc_timeout.tv_sec == -1 186 && utimeout.tv_sec == 0 | 230 if (stat == RPC_TIMEDOUT) { 231 /* 232 * Check for async send misfeature for NLM 233 * protocol. 234 */ 235 if ((rc->rc_timeout.tv_sec == 0 236 && rc->rc_timeout.tv_usec == 0) 237 || (rc->rc_timeout.tv_sec == -1 238 && utimeout.tv_sec == 0 |
187 && utimeout.tv_usec == 0)) | 239 && utimeout.tv_usec == 0)) { |
188 break; | 240 break; |
241 } |
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189 } 190 191 if (stat == RPC_INTR) 192 break; 193 194 if (stat != RPC_SUCCESS) { | 242 } 243 244 if (stat == RPC_INTR) 245 break; 246 247 if (stat != RPC_SUCCESS) { |
195 CLNT_DESTROY(rc->rc_client); 196 rc->rc_client = NULL; | 248 tries++; 249 if (tries >= rc->rc_retries) 250 break; 251 252 if (ext && ext->rc_feedback) 253 ext->rc_feedback(FEEDBACK_RECONNECT, proc, 254 ext->rc_feedback_arg); 255 256 mtx_lock(&rc->rc_lock); 257 /* 258 * Make sure that someone else hasn't already 259 * reconnected. 260 */ 261 if (rc->rc_client == client) { 262 CLNT_RELEASE(rc->rc_client); 263 rc->rc_client = NULL; 264 } 265 mtx_unlock(&rc->rc_lock); |
197 } 198 } while (stat != RPC_SUCCESS); 199 200 return (stat); 201} 202 203static void 204clnt_reconnect_geterr(CLIENT *cl, struct rpc_err *errp) --- 84 unchanged lines hidden (view full) --- 289 if (rc->rc_client) 290 CLNT_CONTROL(rc->rc_client, request, info); 291 break; 292 293 case CLGET_INTERRUPTIBLE: 294 *(int *) info = rc->rc_intr; 295 break; 296 | 266 } 267 } while (stat != RPC_SUCCESS); 268 269 return (stat); 270} 271 272static void 273clnt_reconnect_geterr(CLIENT *cl, struct rpc_err *errp) --- 84 unchanged lines hidden (view full) --- 358 if (rc->rc_client) 359 CLNT_CONTROL(rc->rc_client, request, info); 360 break; 361 362 case CLGET_INTERRUPTIBLE: 363 *(int *) info = rc->rc_intr; 364 break; 365 |
366 case CLSET_RETRIES: 367 rc->rc_retries = *(int *) info; 368 break; 369 370 case CLGET_RETRIES: 371 *(int *) info = rc->rc_retries; 372 break; 373 |
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297 default: 298 return (FALSE); 299 } 300 301 return (TRUE); 302} 303 304static void 305clnt_reconnect_destroy(CLIENT *cl) 306{ 307 struct rc_data *rc = (struct rc_data *)cl->cl_private; 308 309 if (rc->rc_client) 310 CLNT_DESTROY(rc->rc_client); 311 mem_free(rc, sizeof(*rc)); 312 mem_free(cl, sizeof (CLIENT)); 313} | 374 default: 375 return (FALSE); 376 } 377 378 return (TRUE); 379} 380 381static void 382clnt_reconnect_destroy(CLIENT *cl) 383{ 384 struct rc_data *rc = (struct rc_data *)cl->cl_private; 385 386 if (rc->rc_client) 387 CLNT_DESTROY(rc->rc_client); 388 mem_free(rc, sizeof(*rc)); 389 mem_free(cl, sizeof (CLIENT)); 390} |