lustre/mdc/mdc_reint.c

   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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_MDC
  34
  35 #include <linux/module.h>
  36 #include <linux/kernel.h>
  37
  38 #include <obd_class.h>
  39 #include "mdc_internal.h"
  40 #include <lustre_fid.h>
  41
  42 /* mdc_setattr does its own semaphore handling */
  43 static int mdc_reint(struct ptlrpc_request *request, int level)
  44 {
  45         int rc;
  46
  47         request->rq_send_state = level;
  48
  49         mdc_get_mod_rpc_slot(request, NULL);
  50         rc = ptlrpc_queue_wait(request);
  51         mdc_put_mod_rpc_slot(request, NULL);
  52         if (rc)
  53                 CDEBUG(D_INFO, "error in handling %d\n", rc);
  54         else if (!req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY)) {
  55                 rc = -EPROTO;
  56         }
  57         return rc;
  58 }
  59
  60 /* Find and cancel locally locks matched by inode @bits & @mode in the resource
  61  * found by @fid. Found locks are added into @cancel list. Returns the amount of
  62  * locks added to @cancels list. */
  63 int mdc_resource_get_unused(struct obd_export *exp, const struct lu_fid *fid,
  64                             struct list_head *cancels, enum ldlm_mode mode,
  65                             __u64 bits)
  66 {
  67         struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
  68         union ldlm_policy_data policy = { {0} };
  69         struct ldlm_res_id res_id;
  70         struct ldlm_resource *res;
  71         int count;
  72         ENTRY;
  73
  74         /* Return, i.e. cancel nothing, only if ELC is supported (flag in
  75          * export) but disabled through procfs (flag in NS).
  76          *
  77          * This distinguishes from a case when ELC is not supported originally,
  78          * when we still want to cancel locks in advance and just cancel them
  79          * locally, without sending any RPC. */
  80         if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
  81                 RETURN(0);
  82
  83         fid_build_reg_res_name(fid, &res_id);
  84         res = ldlm_resource_get(exp->exp_obd->obd_namespace,
  85                                 NULL, &res_id, 0, 0);
  86         if (IS_ERR(res))
  87                 RETURN(0);
  88         LDLM_RESOURCE_ADDREF(res);
  89         /* Initialize ibits lock policy. */
  90         policy.l_inodebits.bits = bits;
  91         count = ldlm_cancel_resource_local(res, cancels, &policy,
  92                                            mode, 0, 0, NULL);
  93         LDLM_RESOURCE_DELREF(res);
  94         ldlm_resource_putref(res);
  95         RETURN(count);
  96 }
  97
  98 int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
  99                 void *ea, size_t ealen, struct ptlrpc_request **request)
 100 {
 101         struct list_head cancels = LIST_HEAD_INIT(cancels);
 102         struct ptlrpc_request *req;
 103         int count = 0, rc;
 104         __u64 bits;
 105         ENTRY;
 106
 107         LASSERT(op_data != NULL);
 108
 109         bits = MDS_INODELOCK_UPDATE;
 110         if (op_data->op_attr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID))
 111                 bits |= MDS_INODELOCK_LOOKUP;
 112         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
 113             (fid_is_sane(&op_data->op_fid1)))
 114                 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
 115                                                 &cancels, LCK_EX, bits);
 116         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 117                                    &RQF_MDS_REINT_SETATTR);
 118         if (req == NULL) {
 119                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
 120                 RETURN(-ENOMEM);
 121         }
 122
 123         req_capsule_set_size(&req->rq_pill, &RMF_MDT_EPOCH, RCL_CLIENT, 0);
 124         req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, ealen);
 125         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_CLIENT, 0);
 126
 127         rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
 128         if (rc) {
 129                 ptlrpc_request_free(req);
 130                 RETURN(rc);
 131         }
 132
 133         if (op_data->op_attr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
 134                 CDEBUG(D_INODE, "setting mtime %lld, ctime %lld\n",
 135                        (s64)op_data->op_attr.ia_mtime.tv_sec,
 136                        (s64)op_data->op_attr.ia_ctime.tv_sec);
 137         mdc_setattr_pack(req, op_data, ea, ealen);
 138
 139         req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
 140                              MIN(req->rq_import->imp_connect_data.ocd_max_easize,
 141                                  XATTR_SIZE_MAX));
 142         ptlrpc_request_set_replen(req);
 143
 144         rc = mdc_reint(req, LUSTRE_IMP_FULL);
 145         if (rc == -ERESTARTSYS)
 146                 rc = 0;
 147
 148         *request = req;
 149
 150         RETURN(rc);
 151 }
 152
 153 int mdc_create(struct obd_export *exp, struct md_op_data *op_data,
 154                 const void *data, size_t datalen,
 155                 umode_t mode, uid_t uid, gid_t gid,
 156                 cfs_cap_t cap_effective, __u64 rdev,
 157                 struct ptlrpc_request **request)
 158 {
 159         struct ptlrpc_request *req;
 160         int level, rc;
 161         int count, resends = 0;
 162         struct obd_import *import = exp->exp_obd->u.cli.cl_import;
 163         int generation = import->imp_generation;
 164         struct list_head cancels = LIST_HEAD_INIT(cancels);
 165         ENTRY;
 166
 167         /* For case if upper layer did not alloc fid, do it now. */
 168         if (!fid_is_sane(&op_data->op_fid2)) {
 169                 /*
 170                  * mdc_fid_alloc() may return errno 1 in case of switch to new
 171                  * sequence, handle this.
 172                  */
 173                 rc = mdc_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
 174                 if (rc < 0)
 175                         RETURN(rc);
 176         }
 177
 178 rebuild:
 179         count = 0;
 180         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
 181             (fid_is_sane(&op_data->op_fid1)))
 182                 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
 183                                                 &cancels, LCK_EX,
 184                                                 MDS_INODELOCK_UPDATE);
 185
 186         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 187                                    &RQF_MDS_REINT_CREATE_ACL);
 188         if (req == NULL) {
 189                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
 190                 RETURN(-ENOMEM);
 191         }
 192
 193         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 194                              op_data->op_namelen + 1);
 195         req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
 196                              data && datalen ? datalen : 0);
 197
 198         req_capsule_set_size(&req->rq_pill, &RMF_FILE_SECCTX_NAME,
 199                              RCL_CLIENT, op_data->op_file_secctx_name != NULL ?
 200                              strlen(op_data->op_file_secctx_name) + 1 : 0);
 201
 202         req_capsule_set_size(&req->rq_pill, &RMF_FILE_SECCTX, RCL_CLIENT,
 203                              op_data->op_file_secctx_size);
 204
 205         rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
 206         if (rc) {
 207                 ptlrpc_request_free(req);
 208                 RETURN(rc);
 209         }
 210
 211         /*
 212          * mdc_create_pack() fills msg->bufs[1] with name and msg->bufs[2] with
 213          * tgt, for symlinks or lov MD data.
 214          */
 215         mdc_create_pack(req, op_data, data, datalen, mode, uid,
 216                         gid, cap_effective, rdev);
 217
 218         ptlrpc_request_set_replen(req);
 219
 220         /* ask ptlrpc not to resend on EINPROGRESS since we have our own retry
 221          * logic here */
 222         req->rq_no_retry_einprogress = 1;
 223
 224         if (resends) {
 225                 req->rq_generation_set = 1;
 226                 req->rq_import_generation = generation;
 227                 req->rq_sent = ktime_get_real_seconds() + resends;
 228         }
 229         level = LUSTRE_IMP_FULL;
 230  resend:
 231         rc = mdc_reint(req, level);
 232
 233         /* Resend if we were told to. */
 234         if (rc == -ERESTARTSYS) {
 235                 level = LUSTRE_IMP_RECOVER;
 236                 goto resend;
 237         } else if (rc == -EINPROGRESS) {
 238                 /* Retry create infinitely until succeed or get other
 239                  * error code or interrupted. */
 240                 ptlrpc_req_finished(req);
 241                 if (generation == import->imp_generation) {
 242                         if (signal_pending(current))
 243                                 RETURN(-EINTR);
 244
 245                         resends++;
 246                         CDEBUG(D_HA, "%s: resend:%d create on "DFID"/"DFID"\n",
 247                                exp->exp_obd->obd_name, resends,
 248                                PFID(&op_data->op_fid1),
 249                                PFID(&op_data->op_fid2));
 250                         goto rebuild;
 251                 } else {
 252                         CDEBUG(D_HA, "resend cross eviction\n");
 253                         RETURN(-EIO);
 254                 }
 255         }
 256
 257         *request = req;
 258         RETURN(rc);
 259 }
 260
 261 int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data,
 262                struct ptlrpc_request **request)
 263 {
 264         struct list_head cancels = LIST_HEAD_INIT(cancels);
 265         struct obd_device *obd = class_exp2obd(exp);
 266         struct ptlrpc_request *req = *request;
 267         int count = 0, rc;
 268         ENTRY;
 269
 270         LASSERT(req == NULL);
 271
 272         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
 273             (fid_is_sane(&op_data->op_fid1)))
 274                 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
 275                                                 &cancels, LCK_EX,
 276                                                 MDS_INODELOCK_UPDATE);
 277         if ((op_data->op_flags & MF_MDC_CANCEL_FID3) &&
 278             (fid_is_sane(&op_data->op_fid3)))
 279                 /* don't cancel DoM lock which may cause data flush */
 280                 count += mdc_resource_get_unused(exp, &op_data->op_fid3,
 281                                                  &cancels, LCK_EX,
 282                                                  MDS_INODELOCK_ELC);
 283         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 284                                    &RQF_MDS_REINT_UNLINK);
 285         if (req == NULL) {
 286                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
 287                 RETURN(-ENOMEM);
 288         }
 289
 290         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 291                              op_data->op_namelen + 1);
 292
 293         rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
 294         if (rc) {
 295                 ptlrpc_request_free(req);
 296                 RETURN(rc);
 297         }
 298
 299         mdc_unlink_pack(req, op_data);
 300
 301         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 302                              obd->u.cli.cl_default_mds_easize);
 303         ptlrpc_request_set_replen(req);
 304
 305         *request = req;
 306
 307         rc = mdc_reint(req, LUSTRE_IMP_FULL);
 308         if (rc == -ERESTARTSYS)
 309                 rc = 0;
 310         RETURN(rc);
 311 }
 312
 313 int mdc_link(struct obd_export *exp, struct md_op_data *op_data,
 314              struct ptlrpc_request **request)
 315 {
 316         struct list_head cancels = LIST_HEAD_INIT(cancels);
 317         struct ptlrpc_request *req;
 318         int count = 0, rc;
 319         ENTRY;
 320
 321         if ((op_data->op_flags & MF_MDC_CANCEL_FID2) &&
 322             (fid_is_sane(&op_data->op_fid2)))
 323                 count = mdc_resource_get_unused(exp, &op_data->op_fid2,
 324                                                 &cancels, LCK_EX,
 325                                                 MDS_INODELOCK_UPDATE);
 326         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
 327             (fid_is_sane(&op_data->op_fid1)))
 328                 count += mdc_resource_get_unused(exp, &op_data->op_fid1,
 329                                                  &cancels, LCK_EX,
 330                                                  MDS_INODELOCK_UPDATE);
 331
 332         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_REINT_LINK);
 333         if (req == NULL) {
 334                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
 335                 RETURN(-ENOMEM);
 336         }
 337
 338         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 339                              op_data->op_namelen + 1);
 340
 341         rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
 342         if (rc) {
 343                 ptlrpc_request_free(req);
 344                 RETURN(rc);
 345         }
 346
 347         mdc_link_pack(req, op_data);
 348         ptlrpc_request_set_replen(req);
 349
 350         rc = mdc_reint(req, LUSTRE_IMP_FULL);
 351         *request = req;
 352         if (rc == -ERESTARTSYS)
 353                 rc = 0;
 354
 355         RETURN(rc);
 356 }
 357
 358 int mdc_rename(struct obd_export *exp, struct md_op_data *op_data,
 359                 const char *old, size_t oldlen, const char *new, size_t newlen,
 360                 struct ptlrpc_request **request)
 361 {
 362         struct list_head cancels = LIST_HEAD_INIT(cancels);
 363         struct obd_device *obd = exp->exp_obd;
 364         struct ptlrpc_request *req;
 365         int count = 0, rc;
 366
 367         ENTRY;
 368
 369         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
 370             (fid_is_sane(&op_data->op_fid1)))
 371                 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
 372                                                 &cancels, LCK_EX,
 373                                                 MDS_INODELOCK_UPDATE);
 374         if ((op_data->op_flags & MF_MDC_CANCEL_FID2) &&
 375             (fid_is_sane(&op_data->op_fid2)))
 376                 count += mdc_resource_get_unused(exp, &op_data->op_fid2,
 377                                                  &cancels, LCK_EX,
 378                                                  MDS_INODELOCK_UPDATE);
 379         if ((op_data->op_flags & MF_MDC_CANCEL_FID3) &&
 380             (fid_is_sane(&op_data->op_fid3)))
 381                 count += mdc_resource_get_unused(exp, &op_data->op_fid3,
 382                                                  &cancels, LCK_EX,
 383                                                  MDS_INODELOCK_LOOKUP);
 384         if ((op_data->op_flags & MF_MDC_CANCEL_FID4) &&
 385             (fid_is_sane(&op_data->op_fid4)))
 386                 count += mdc_resource_get_unused(exp, &op_data->op_fid4,
 387                                                  &cancels, LCK_EX,
 388                                                  MDS_INODELOCK_ELC);
 389
 390         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 391                            op_data->op_cli_flags & CLI_MIGRATE ?
 392                            &RQF_MDS_REINT_MIGRATE : &RQF_MDS_REINT_RENAME);
 393         if (req == NULL) {
 394                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
 395                 RETURN(-ENOMEM);
 396         }
 397
 398         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, oldlen + 1);
 399         req_capsule_set_size(&req->rq_pill, &RMF_SYMTGT, RCL_CLIENT, newlen+1);
 400         if (op_data->op_cli_flags & CLI_MIGRATE)
 401                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
 402                                      op_data->op_data_size);
 403
 404         rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
 405         if (rc) {
 406                 ptlrpc_request_free(req);
 407                 RETURN(rc);
 408         }
 409
 410         if (exp_connect_cancelset(exp) && req)
 411                 ldlm_cli_cancel_list(&cancels, count, req, 0);
 412
 413         if (op_data->op_cli_flags & CLI_MIGRATE)
 414                 mdc_migrate_pack(req, op_data, old, oldlen);
 415         else
 416                 mdc_rename_pack(req, op_data, old, oldlen, new, newlen);
 417
 418         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 419                              obd->u.cli.cl_default_mds_easize);
 420         ptlrpc_request_set_replen(req);
 421
 422         rc = mdc_reint(req, LUSTRE_IMP_FULL);
 423         *request = req;
 424         if (rc == -ERESTARTSYS)
 425                 rc = 0;
 426
 427         RETURN(rc);
 428 }
 429
 430 int mdc_file_resync(struct obd_export *exp, struct md_op_data *op_data)
 431 {
 432         struct list_head cancels = LIST_HEAD_INIT(cancels);
 433         struct ptlrpc_request *req;
 434         struct ldlm_lock *lock;
 435         struct mdt_rec_resync *rec;
 436         int count = 0, rc;
 437         ENTRY;
 438
 439         if (op_data->op_flags & MF_MDC_CANCEL_FID1 &&
 440             fid_is_sane(&op_data->op_fid1))
 441                 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
 442                                                 &cancels, LCK_EX,
 443                                                 MDS_INODELOCK_LAYOUT);
 444
 445         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 446                                    &RQF_MDS_REINT_RESYNC);
 447         if (req == NULL) {
 448                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
 449                 RETURN(-ENOMEM);
 450         }
 451
 452         rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
 453         if (rc) {
 454                 ptlrpc_request_free(req);
 455                 RETURN(rc);
 456         }
 457
 458         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
 459         rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 460         rec->rs_opcode  = REINT_RESYNC;
 461         rec->rs_fsuid   = op_data->op_fsuid;
 462         rec->rs_fsgid   = op_data->op_fsgid;
 463         rec->rs_cap     = op_data->op_cap;
 464         rec->rs_fid     = op_data->op_fid1;
 465         rec->rs_bias    = op_data->op_bias;
 466         rec->rs_mirror_id = op_data->op_mirror_id;
 467
 468         lock = ldlm_handle2lock(&op_data->op_lease_handle);
 469         if (lock != NULL) {
 470                 rec->rs_lease_handle = lock->l_remote_handle;
 471                 LDLM_LOCK_PUT(lock);
 472         }
 473
 474         ptlrpc_request_set_replen(req);
 475
 476         rc = mdc_reint(req, LUSTRE_IMP_FULL);
 477         if (rc == -ERESTARTSYS)
 478                 rc = 0;
 479
 480         ptlrpc_req_finished(req);
 481         RETURN(rc);
 482 }