1/* 2 * GPL HEADER START 3 * 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 only, 8 * as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License version 2 for more details (a copy is included 14 * in the LICENSE file that accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License 17 * version 2 along with this program; If not, see 18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf 19 * 20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 21 * CA 95054 USA or visit www.sun.com if you need additional information or 22 * have any questions. 23 * 24 * GPL HEADER END 25 */ 26/* 27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. 28 * Use is subject to license terms. 29 * 30 * Copyright (c) 2011, 2012, Intel Corporation. 31 */ 32/* 33 * This file is part of Lustre, http://www.lustre.org/ 34 * Lustre is a trademark of Sun Microsystems, Inc. 35 */ 36 37#define DEBUG_SUBSYSTEM S_MDC 38 39# include <linux/module.h> 40# include <linux/kernel.h> 41 42#include "../include/obd_class.h" 43#include "mdc_internal.h" 44#include "../include/lustre_fid.h" 45 46/* mdc_setattr does its own semaphore handling */ 47static int mdc_reint(struct ptlrpc_request *request, 48 struct mdc_rpc_lock *rpc_lock, 49 int level) 50{ 51 int rc; 52 53 request->rq_send_state = level; 54 55 mdc_get_rpc_lock(rpc_lock, NULL); 56 rc = ptlrpc_queue_wait(request); 57 mdc_put_rpc_lock(rpc_lock, NULL); 58 if (rc) 59 CDEBUG(D_INFO, "error in handling %d\n", rc); 60 else if (!req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY)) 61 rc = -EPROTO; 62 63 return rc; 64} 65 66/* Find and cancel locally locks matched by inode @bits & @mode in the resource 67 * found by @fid. Found locks are added into @cancel list. Returns the amount of 68 * locks added to @cancels list. */ 69int mdc_resource_get_unused(struct obd_export *exp, const struct lu_fid *fid, 70 struct list_head *cancels, ldlm_mode_t mode, 71 __u64 bits) 72{ 73 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace; 74 ldlm_policy_data_t policy = {}; 75 struct ldlm_res_id res_id; 76 struct ldlm_resource *res; 77 int count; 78 79 /* Return, i.e. cancel nothing, only if ELC is supported (flag in 80 * export) but disabled through procfs (flag in NS). 81 * 82 * This distinguishes from a case when ELC is not supported originally, 83 * when we still want to cancel locks in advance and just cancel them 84 * locally, without sending any RPC. */ 85 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns)) 86 return 0; 87 88 fid_build_reg_res_name(fid, &res_id); 89 res = ldlm_resource_get(exp->exp_obd->obd_namespace, 90 NULL, &res_id, 0, 0); 91 if (res == NULL) 92 return 0; 93 LDLM_RESOURCE_ADDREF(res); 94 /* Initialize ibits lock policy. */ 95 policy.l_inodebits.bits = bits; 96 count = ldlm_cancel_resource_local(res, cancels, &policy, 97 mode, 0, 0, NULL); 98 LDLM_RESOURCE_DELREF(res); 99 ldlm_resource_putref(res); 100 return count; 101} 102 103int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data, 104 void *ea, int ealen, void *ea2, int ea2len, 105 struct ptlrpc_request **request, struct md_open_data **mod) 106{ 107 LIST_HEAD(cancels); 108 struct ptlrpc_request *req; 109 struct mdc_rpc_lock *rpc_lock; 110 struct obd_device *obd = exp->exp_obd; 111 int count = 0, rc; 112 __u64 bits; 113 114 LASSERT(op_data != NULL); 115 116 bits = MDS_INODELOCK_UPDATE; 117 if (op_data->op_attr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) 118 bits |= MDS_INODELOCK_LOOKUP; 119 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) && 120 (fid_is_sane(&op_data->op_fid1)) && 121 !OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET)) 122 count = mdc_resource_get_unused(exp, &op_data->op_fid1, 123 &cancels, LCK_EX, bits); 124 req = ptlrpc_request_alloc(class_exp2cliimp(exp), 125 &RQF_MDS_REINT_SETATTR); 126 if (req == NULL) { 127 ldlm_lock_list_put(&cancels, l_bl_ast, count); 128 return -ENOMEM; 129 } 130 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1); 131 if ((op_data->op_flags & (MF_SOM_CHANGE | MF_EPOCH_OPEN)) == 0) 132 req_capsule_set_size(&req->rq_pill, &RMF_MDT_EPOCH, RCL_CLIENT, 133 0); 134 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, ealen); 135 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_CLIENT, 136 ea2len); 137 138 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count); 139 if (rc) { 140 ptlrpc_request_free(req); 141 return rc; 142 } 143 144 rpc_lock = obd->u.cli.cl_rpc_lock; 145 146 if (op_data->op_attr.ia_valid & (ATTR_MTIME | ATTR_CTIME)) 147 CDEBUG(D_INODE, "setting mtime "CFS_TIME_T 148 ", ctime "CFS_TIME_T"\n", 149 LTIME_S(op_data->op_attr.ia_mtime), 150 LTIME_S(op_data->op_attr.ia_ctime)); 151 mdc_setattr_pack(req, op_data, ea, ealen, ea2, ea2len); 152 153 ptlrpc_request_set_replen(req); 154 if (mod && (op_data->op_flags & MF_EPOCH_OPEN) && 155 req->rq_import->imp_replayable) { 156 LASSERT(*mod == NULL); 157 158 *mod = obd_mod_alloc(); 159 if (*mod == NULL) { 160 DEBUG_REQ(D_ERROR, req, "Can't allocate md_open_data"); 161 } else { 162 req->rq_replay = 1; 163 req->rq_cb_data = *mod; 164 (*mod)->mod_open_req = req; 165 req->rq_commit_cb = mdc_commit_open; 166 (*mod)->mod_is_create = true; 167 /** 168 * Take an extra reference on \var mod, it protects \var 169 * mod from being freed on eviction (commit callback is 170 * called despite rq_replay flag). 171 * Will be put on mdc_done_writing(). 172 */ 173 obd_mod_get(*mod); 174 } 175 } 176 177 rc = mdc_reint(req, rpc_lock, LUSTRE_IMP_FULL); 178 179 /* Save the obtained info in the original RPC for the replay case. */ 180 if (rc == 0 && (op_data->op_flags & MF_EPOCH_OPEN)) { 181 struct mdt_ioepoch *epoch; 182 struct mdt_body *body; 183 184 epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH); 185 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); 186 LASSERT(epoch != NULL); 187 LASSERT(body != NULL); 188 epoch->handle = body->handle; 189 epoch->ioepoch = body->ioepoch; 190 req->rq_replay_cb = mdc_replay_open; 191 /** bug 3633, open may be committed and estale answer is not error */ 192 } else if (rc == -ESTALE && (op_data->op_flags & MF_SOM_CHANGE)) { 193 rc = 0; 194 } else if (rc == -ERESTARTSYS) { 195 rc = 0; 196 } 197 *request = req; 198 if (rc && req->rq_commit_cb) { 199 /* Put an extra reference on \var mod on error case. */ 200 if (mod != NULL && *mod != NULL) 201 obd_mod_put(*mod); 202 req->rq_commit_cb(req); 203 } 204 return rc; 205} 206 207int mdc_create(struct obd_export *exp, struct md_op_data *op_data, 208 const void *data, int datalen, int mode, __u32 uid, __u32 gid, 209 cfs_cap_t cap_effective, __u64 rdev, 210 struct ptlrpc_request **request) 211{ 212 struct ptlrpc_request *req; 213 int level, rc; 214 int count, resends = 0; 215 struct obd_import *import = exp->exp_obd->u.cli.cl_import; 216 int generation = import->imp_generation; 217 LIST_HEAD(cancels); 218 219 /* For case if upper layer did not alloc fid, do it now. */ 220 if (!fid_is_sane(&op_data->op_fid2)) { 221 /* 222 * mdc_fid_alloc() may return errno 1 in case of switch to new 223 * sequence, handle this. 224 */ 225 rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data); 226 if (rc < 0) { 227 CERROR("Can't alloc new fid, rc %d\n", rc); 228 return rc; 229 } 230 } 231 232rebuild: 233 count = 0; 234 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) && 235 (fid_is_sane(&op_data->op_fid1))) 236 count = mdc_resource_get_unused(exp, &op_data->op_fid1, 237 &cancels, LCK_EX, 238 MDS_INODELOCK_UPDATE); 239 240 req = ptlrpc_request_alloc(class_exp2cliimp(exp), 241 &RQF_MDS_REINT_CREATE_RMT_ACL); 242 if (req == NULL) { 243 ldlm_lock_list_put(&cancels, l_bl_ast, count); 244 return -ENOMEM; 245 } 246 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1); 247 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, 248 op_data->op_namelen + 1); 249 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, 250 data && datalen ? datalen : 0); 251 252 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count); 253 if (rc) { 254 ptlrpc_request_free(req); 255 return rc; 256 } 257 258 /* 259 * mdc_create_pack() fills msg->bufs[1] with name and msg->bufs[2] with 260 * tgt, for symlinks or lov MD data. 261 */ 262 mdc_create_pack(req, op_data, data, datalen, mode, uid, 263 gid, cap_effective, rdev); 264 265 ptlrpc_request_set_replen(req); 266 267 /* ask ptlrpc not to resend on EINPROGRESS since we have our own retry 268 * logic here */ 269 req->rq_no_retry_einprogress = 1; 270 271 if (resends) { 272 req->rq_generation_set = 1; 273 req->rq_import_generation = generation; 274 req->rq_sent = get_seconds() + resends; 275 } 276 level = LUSTRE_IMP_FULL; 277 resend: 278 rc = mdc_reint(req, exp->exp_obd->u.cli.cl_rpc_lock, level); 279 280 /* Resend if we were told to. */ 281 if (rc == -ERESTARTSYS) { 282 level = LUSTRE_IMP_RECOVER; 283 goto resend; 284 } else if (rc == -EINPROGRESS) { 285 /* Retry create infinitely until succeed or get other 286 * error code. */ 287 ptlrpc_req_finished(req); 288 resends++; 289 290 CDEBUG(D_HA, "%s: resend:%d create on "DFID"/"DFID"\n", 291 exp->exp_obd->obd_name, resends, 292 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2)); 293 294 if (generation == import->imp_generation) { 295 goto rebuild; 296 } else { 297 CDEBUG(D_HA, "resend cross eviction\n"); 298 return -EIO; 299 } 300 } else if (rc == 0) { 301 struct mdt_body *body; 302 struct lustre_capa *capa; 303 304 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); 305 LASSERT(body); 306 if (body->valid & OBD_MD_FLMDSCAPA) { 307 capa = req_capsule_server_get(&req->rq_pill, 308 &RMF_CAPA1); 309 if (capa == NULL) 310 rc = -EPROTO; 311 } 312 } 313 314 *request = req; 315 return rc; 316} 317 318int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data, 319 struct ptlrpc_request **request) 320{ 321 LIST_HEAD(cancels); 322 struct obd_device *obd = class_exp2obd(exp); 323 struct ptlrpc_request *req = *request; 324 int count = 0, rc; 325 326 LASSERT(req == NULL); 327 328 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) && 329 (fid_is_sane(&op_data->op_fid1)) && 330 !OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET)) 331 count = mdc_resource_get_unused(exp, &op_data->op_fid1, 332 &cancels, LCK_EX, 333 MDS_INODELOCK_UPDATE); 334 if ((op_data->op_flags & MF_MDC_CANCEL_FID3) && 335 (fid_is_sane(&op_data->op_fid3)) && 336 !OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET)) 337 count += mdc_resource_get_unused(exp, &op_data->op_fid3, 338 &cancels, LCK_EX, 339 MDS_INODELOCK_FULL); 340 req = ptlrpc_request_alloc(class_exp2cliimp(exp), 341 &RQF_MDS_REINT_UNLINK); 342 if (req == NULL) { 343 ldlm_lock_list_put(&cancels, l_bl_ast, count); 344 return -ENOMEM; 345 } 346 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1); 347 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, 348 op_data->op_namelen + 1); 349 350 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count); 351 if (rc) { 352 ptlrpc_request_free(req); 353 return rc; 354 } 355 356 mdc_unlink_pack(req, op_data); 357 358 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, 359 obd->u.cli.cl_default_mds_easize); 360 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER, 361 obd->u.cli.cl_default_mds_cookiesize); 362 ptlrpc_request_set_replen(req); 363 364 *request = req; 365 366 rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL); 367 if (rc == -ERESTARTSYS) 368 rc = 0; 369 return rc; 370} 371 372int mdc_link(struct obd_export *exp, struct md_op_data *op_data, 373 struct ptlrpc_request **request) 374{ 375 LIST_HEAD(cancels); 376 struct obd_device *obd = exp->exp_obd; 377 struct ptlrpc_request *req; 378 int count = 0, rc; 379 380 if ((op_data->op_flags & MF_MDC_CANCEL_FID2) && 381 (fid_is_sane(&op_data->op_fid2))) 382 count = mdc_resource_get_unused(exp, &op_data->op_fid2, 383 &cancels, LCK_EX, 384 MDS_INODELOCK_UPDATE); 385 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) && 386 (fid_is_sane(&op_data->op_fid1))) 387 count += mdc_resource_get_unused(exp, &op_data->op_fid1, 388 &cancels, LCK_EX, 389 MDS_INODELOCK_UPDATE); 390 391 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_REINT_LINK); 392 if (req == NULL) { 393 ldlm_lock_list_put(&cancels, l_bl_ast, count); 394 return -ENOMEM; 395 } 396 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1); 397 mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa2); 398 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, 399 op_data->op_namelen + 1); 400 401 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count); 402 if (rc) { 403 ptlrpc_request_free(req); 404 return rc; 405 } 406 407 mdc_link_pack(req, op_data); 408 ptlrpc_request_set_replen(req); 409 410 rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL); 411 *request = req; 412 if (rc == -ERESTARTSYS) 413 rc = 0; 414 415 return rc; 416} 417 418int mdc_rename(struct obd_export *exp, struct md_op_data *op_data, 419 const char *old, int oldlen, const char *new, int newlen, 420 struct ptlrpc_request **request) 421{ 422 LIST_HEAD(cancels); 423 struct obd_device *obd = exp->exp_obd; 424 struct ptlrpc_request *req; 425 int count = 0, rc; 426 427 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) && 428 (fid_is_sane(&op_data->op_fid1))) 429 count = mdc_resource_get_unused(exp, &op_data->op_fid1, 430 &cancels, LCK_EX, 431 MDS_INODELOCK_UPDATE); 432 if ((op_data->op_flags & MF_MDC_CANCEL_FID2) && 433 (fid_is_sane(&op_data->op_fid2))) 434 count += mdc_resource_get_unused(exp, &op_data->op_fid2, 435 &cancels, LCK_EX, 436 MDS_INODELOCK_UPDATE); 437 if ((op_data->op_flags & MF_MDC_CANCEL_FID3) && 438 (fid_is_sane(&op_data->op_fid3))) 439 count += mdc_resource_get_unused(exp, &op_data->op_fid3, 440 &cancels, LCK_EX, 441 MDS_INODELOCK_LOOKUP); 442 if ((op_data->op_flags & MF_MDC_CANCEL_FID4) && 443 (fid_is_sane(&op_data->op_fid4))) 444 count += mdc_resource_get_unused(exp, &op_data->op_fid4, 445 &cancels, LCK_EX, 446 MDS_INODELOCK_FULL); 447 448 req = ptlrpc_request_alloc(class_exp2cliimp(exp), 449 &RQF_MDS_REINT_RENAME); 450 if (req == NULL) { 451 ldlm_lock_list_put(&cancels, l_bl_ast, count); 452 return -ENOMEM; 453 } 454 455 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1); 456 mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa2); 457 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, oldlen + 1); 458 req_capsule_set_size(&req->rq_pill, &RMF_SYMTGT, RCL_CLIENT, newlen+1); 459 460 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count); 461 if (rc) { 462 ptlrpc_request_free(req); 463 return rc; 464 } 465 466 if (exp_connect_cancelset(exp) && req) 467 ldlm_cli_cancel_list(&cancels, count, req, 0); 468 469 mdc_rename_pack(req, op_data, old, oldlen, new, newlen); 470 471 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, 472 obd->u.cli.cl_default_mds_easize); 473 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER, 474 obd->u.cli.cl_default_mds_cookiesize); 475 ptlrpc_request_set_replen(req); 476 477 rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL); 478 *request = req; 479 if (rc == -ERESTARTSYS) 480 rc = 0; 481 482 return rc; 483} 484