lustre/mdc/mdc_reint.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 #ifndef EXPORT_SYMTAB
  38 # define EXPORT_SYMTAB
  39 #endif
  40 #define DEBUG_SUBSYSTEM S_MDC
  41
  42 #ifdef __KERNEL__
  43 #ifndef AUTOCONF_INCLUDED
  44 # include <linux/config.h>
  45 #endif
  46 # include <linux/module.h>
  47 # include <linux/kernel.h>
  48 #else
  49 # include <liblustre.h>
  50 #endif
  51
  52 #include <obd_class.h>
  53 #include "mdc_internal.h"
  54
  55 /* mdc_setattr does its own semaphore handling */
  56 static int mdc_reint(struct ptlrpc_request *request,
  57                      struct mdc_rpc_lock *rpc_lock, int level)
  58 {
  59         int rc;
  60
  61         request->rq_send_state = level;
  62
  63         mdc_get_rpc_lock(rpc_lock, NULL);
  64         rc = ptlrpc_queue_wait(request);
  65         mdc_put_rpc_lock(rpc_lock, NULL);
  66         if (rc)
  67                 CDEBUG(D_INFO, "error in handling %d\n", rc);
  68         else if (!lustre_swab_repbuf(request, REPLY_REC_OFF,
  69                                      sizeof(struct mds_body),
  70                                      lustre_swab_mds_body)) {
  71                 CERROR ("Can't unpack mds_body\n");
  72                 rc = -EPROTO;
  73         }
  74         return rc;
  75 }
  76
  77 /* Find and cancel locally locks matched by inode @bits & @mode in the resource
  78  * found by @fid. Found locks are added into @cancel list. Returns the amount of
  79  * locks added to @cancels list. */
  80 int mdc_resource_get_unused(struct obd_export *exp, struct ll_fid *fid,
  81                             struct list_head *cancels, ldlm_mode_t mode,
  82                             __u64 bits)
  83 {
  84         struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
  85         struct ldlm_res_id res_id;
  86         struct ldlm_resource *res;
  87         ldlm_policy_data_t policy = {{0}};
  88         int count;
  89         ENTRY;
  90
  91         fid_build_reg_res_name((struct lu_fid*)fid, &res_id);
  92         res = ldlm_resource_get(ns, NULL, res_id, 0, 0);
  93
  94         if (res == NULL)
  95                 RETURN(0);
  96
  97         /* Initialize ibits lock policy. */
  98         policy.l_inodebits.bits = bits;
  99         count = ldlm_cancel_resource_local(res, cancels, &policy,
 100                                            mode, 0, 0, NULL);
 101         ldlm_resource_putref(res);
 102         RETURN(count);
 103 }
 104
 105 struct ptlrpc_request *mdc_prep_elc_req(struct obd_export *exp,
 106                                         int bufcount, __u32 *size, int off,
 107                                         struct list_head *cancels, int count)
 108 {
 109         return ldlm_prep_elc_req(exp, LUSTRE_MDS_VERSION, MDS_REINT,
 110                                  bufcount, size, off, 0, cancels, count);
 111 }
 112
 113 /* If mdc_setattr is called with an 'iattr', then it is a normal RPC that
 114  * should take the normal semaphore and go to the normal portal.
 115  *
 116  * If it is called with iattr->ia_valid & ATTR_FROM_OPEN, then it is a
 117  * magic open-path setattr that should take the setattr semaphore and
 118  * go to the setattr portal. */
 119 int mdc_setattr(struct obd_export *exp, struct mdc_op_data *op_data,
 120                 struct iattr *iattr, void *ea, int ealen, void *ea2, int ea2len,
 121                 struct ptlrpc_request **request)
 122 {
 123         CFS_LIST_HEAD(cancels);
 124         struct ptlrpc_request *req;
 125         struct mdc_rpc_lock *rpc_lock;
 126         struct obd_device *obd = exp->exp_obd;
 127         __u32 size[7] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
 128                         [REQ_REC_OFF] = sizeof(struct mds_rec_setattr),
 129                         [REQ_REC_OFF + 1] = ealen,
 130                         [REQ_REC_OFF + 2] = ea2len,
 131                         [REQ_REC_OFF + 3] = sizeof(struct ldlm_request) };
 132         __u32 replysize[6] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
 133                              [REPLY_REC_OFF] = sizeof(struct mdt_body),
 134                              [REPLY_REC_OFF+1] = obd->u.cli.cl_max_mds_easize,
 135                              [REPLY_REC_OFF+2] = LUSTRE_POSIX_ACL_MAX_SIZE,
 136                              [REPLY_REC_OFF+3] = sizeof(struct lustre_capa),
 137                              [REPLY_REC_OFF+4] = sizeof(struct lustre_capa)};
 138
 139         int count, bufcount = 2, rc, replybufcount = 2;
 140         int offset = REQ_REC_OFF + 3;
 141         __u64 bits;
 142         ENTRY;
 143
 144         LASSERT(iattr != NULL);
 145
 146         if (mdc_exp_is_2_0_server(exp)) {
 147                 size[REQ_REC_OFF] = sizeof(struct mdt_rec_setattr);
 148                 size[REQ_REC_OFF + 1] = 0; /* capa */
 149                 size[REQ_REC_OFF + 2] = 0; //sizeof (struct mdt_epoch);
 150                 size[REQ_REC_OFF + 3] = ealen;
 151                 size[REQ_REC_OFF + 4] = ea2len;
 152                 size[REQ_REC_OFF + 5] = sizeof(struct ldlm_request);
 153                 offset = REQ_REC_OFF + 5;
 154                 bufcount = 6;
 155                 replybufcount = 6;
 156         } else {
 157                 bufcount = 4;
 158         }
 159
 160         bits = MDS_INODELOCK_UPDATE;
 161         if (iattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID))
 162                 bits |= MDS_INODELOCK_LOOKUP;
 163         count = mdc_resource_get_unused(exp, &op_data->fid1,
 164                                         &cancels, LCK_EX, bits);
 165         if (exp_connect_cancelset(exp))
 166                 bufcount ++ ;
 167         req = mdc_prep_elc_req(exp, bufcount, size,
 168                                offset, &cancels, count);
 169         if (req == NULL)
 170                 RETURN(-ENOMEM);
 171
 172         if (iattr->ia_valid & ATTR_FROM_OPEN) {
 173                 req->rq_request_portal = MDS_SETATTR_PORTAL;
 174                 ptlrpc_at_set_req_timeout(req);
 175                 rpc_lock = obd->u.cli.cl_setattr_lock;
 176         } else {
 177                 rpc_lock = obd->u.cli.cl_rpc_lock;
 178         }
 179
 180         if (iattr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
 181                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n",
 182                        LTIME_S(iattr->ia_mtime), LTIME_S(iattr->ia_ctime));
 183         mdc_setattr_pack(req, REQ_REC_OFF, op_data, iattr,
 184                          ea, ealen, ea2, ea2len);
 185
 186         ptlrpc_req_set_repsize(req, replybufcount, replysize);
 187
 188         rc = mdc_reint(req, rpc_lock, LUSTRE_IMP_FULL);
 189         *request = req;
 190         if (rc == -ERESTARTSYS)
 191                 rc = 0;
 192
 193         RETURN(rc);
 194 }
 195
 196 int mdc_create(struct obd_export *exp, struct mdc_op_data *op_data,
 197                const void *data, int datalen, int mode, __u32 uid, __u32 gid,
 198                cfs_cap_t cap_effective, __u64 rdev,
 199                struct ptlrpc_request **request)
 200 {
 201         CFS_LIST_HEAD(cancels);
 202         struct obd_device *obd = exp->exp_obd;
 203         struct ptlrpc_request *req;
 204         int level, bufcount = 3, rc;
 205         __u32 size[6] = { sizeof(struct ptlrpc_body),
 206                         sizeof(struct mds_rec_create),
 207                         op_data->namelen + 1, 0, sizeof(struct ldlm_request) };
 208         int offset = REQ_REC_OFF + 3;
 209         int count;
 210         ENTRY;
 211
 212         if (mdc_exp_is_2_0_server(exp)) {
 213                 size[REQ_REC_OFF] = sizeof(struct mdt_rec_create);
 214                 size[REQ_REC_OFF + 1] = 0; /* capa */
 215                 size[REQ_REC_OFF + 2] = op_data->namelen + 1;
 216                 size[REQ_REC_OFF + 4] = sizeof(struct ldlm_request);
 217                 bufcount++;
 218                 offset ++;
 219         }
 220         if (data && datalen) {
 221                 size[bufcount] = datalen;
 222                 bufcount++;
 223         }
 224
 225         count = mdc_resource_get_unused(exp, &op_data->fid1, &cancels,
 226                                         LCK_EX, MDS_INODELOCK_UPDATE);
 227         if (exp_connect_cancelset(exp)) {
 228                 if (mdc_exp_is_2_0_server(exp)) {
 229                         bufcount = 6;
 230                 } else {
 231                         bufcount = 5;
 232                 }
 233         }
 234
 235         if (mdc_exp_is_2_0_server(exp)) {
 236                 struct client_obd *cli = &obd->u.cli;
 237                 rc = mdc_fid_alloc(cli->cl_seq, (void *)&op_data->fid2);
 238                 if (rc) {
 239                         CERROR("fid allocation result: %d\n", rc);
 240                         RETURN(rc);
 241                 }
 242         }
 243
 244         req = mdc_prep_elc_req(exp, bufcount, size,
 245                                offset, &cancels, count);
 246         if (req == NULL)
 247                 RETURN(-ENOMEM);
 248
 249         /* mdc_create_pack fills msg->bufs[1] with name
 250          * and msg->bufs[2] with tgt, for symlinks or lov MD data */
 251         mdc_create_pack(req, REQ_REC_OFF, op_data, data, datalen, mode, uid,
 252                         gid, cap_effective, rdev);
 253
 254         size[REPLY_REC_OFF] = sizeof(struct mdt_body);
 255         size[REPLY_REC_OFF+1] = sizeof(struct ost_lvb);
 256         ptlrpc_req_set_repsize(req, 3, size);
 257
 258         level = LUSTRE_IMP_FULL;
 259  resend:
 260         rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, level);
 261         /* Resend if we were told to. */
 262         if (rc == -ERESTARTSYS) {
 263                 level = LUSTRE_IMP_RECOVER;
 264                 goto resend;
 265         }
 266
 267         if (!rc)
 268                 mdc_store_inode_generation(req, REQ_REC_OFF, REPLY_REC_OFF);
 269
 270         *request = req;
 271         RETURN(rc);
 272 }
 273
 274 int mdc_unlink(struct obd_export *exp, struct mdc_op_data *op_data,
 275                struct ptlrpc_request **request)
 276 {
 277         CFS_LIST_HEAD(cancels);
 278         struct obd_device *obd = class_exp2obd(exp);
 279         struct ptlrpc_request *req = *request;
 280         __u32 size[5] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
 281                         [REQ_REC_OFF] = sizeof(struct mds_rec_unlink),
 282                         [REQ_REC_OFF + 1] = op_data->namelen + 1,
 283                         [REQ_REC_OFF + 2] = sizeof(struct ldlm_request) };
 284         int count, rc, bufcount = 3;
 285         int offset = REQ_REC_OFF + 2;
 286         ENTRY;
 287
 288         if (mdc_exp_is_2_0_server(exp)) {
 289                 size[REQ_REC_OFF] = sizeof(struct mdt_rec_unlink);
 290                 size[REQ_REC_OFF + 1] = 0 /* capa */;
 291                 size[REQ_REC_OFF + 2] = op_data->namelen + 1;
 292                 size[REQ_REC_OFF + 3] = sizeof(struct ldlm_request);
 293                 bufcount ++;
 294                 offset ++;
 295         }
 296
 297         LASSERT(req == NULL);
 298         count = mdc_resource_get_unused(exp, &op_data->fid1, &cancels,
 299                                         LCK_EX, MDS_INODELOCK_UPDATE);
 300         if (op_data->fid3.id)
 301                 count += mdc_resource_get_unused(exp, &op_data->fid3, &cancels,
 302                                                  LCK_EX, MDS_INODELOCK_FULL);
 303         if (exp_connect_cancelset(exp))
 304                 bufcount ++;
 305
 306         req = mdc_prep_elc_req(exp, bufcount, size,
 307                                offset, &cancels, count);
 308         if (req == NULL)
 309                 RETURN(-ENOMEM);
 310         *request = req;
 311
 312         size[REPLY_REC_OFF] = sizeof(struct mdt_body);
 313         size[REPLY_REC_OFF + 1] = obd->u.cli.cl_max_mds_easize;
 314         size[REPLY_REC_OFF + 2] = obd->u.cli.cl_max_mds_cookiesize;
 315         ptlrpc_req_set_repsize(req, 4, size);
 316
 317         mdc_unlink_pack(req, REQ_REC_OFF, op_data);
 318
 319         rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
 320         if (rc == -ERESTARTSYS)
 321                 rc = 0;
 322         RETURN(rc);
 323 }
 324
 325 int mdc_link(struct obd_export *exp, struct mdc_op_data *op_data,
 326              struct ptlrpc_request **request)
 327 {
 328         CFS_LIST_HEAD(cancels);
 329         struct obd_device *obd = exp->exp_obd;
 330         struct ptlrpc_request *req;
 331         __u32 size[6] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
 332                         [REQ_REC_OFF] = sizeof(struct mds_rec_link),
 333                         [REQ_REC_OFF + 1] = op_data->namelen + 1,
 334                         [REQ_REC_OFF + 2] = sizeof(struct ldlm_request)};
 335         int count, rc, bufcount = 3;
 336         int offset = REQ_REC_OFF + 2;
 337         ENTRY;
 338
 339         if (mdc_exp_is_2_0_server(exp)) {
 340                 size[REQ_REC_OFF] = sizeof(struct mdt_rec_link);
 341                 size[REQ_REC_OFF + 1] = 0; /* capa */
 342                 size[REQ_REC_OFF + 2] = 0; /* capa */
 343                 size[REQ_REC_OFF + 3] = op_data->namelen + 1;
 344                 size[REQ_REC_OFF + 4] = sizeof(struct ldlm_request);
 345                 bufcount = 5;
 346                 offset += 2;
 347         }
 348
 349         count = mdc_resource_get_unused(exp, &op_data->fid1, &cancels,
 350                                         LCK_EX, MDS_INODELOCK_UPDATE);
 351         count += mdc_resource_get_unused(exp, &op_data->fid2, &cancels,
 352                                          LCK_EX, MDS_INODELOCK_UPDATE);
 353         if (exp_connect_cancelset(exp))
 354                 bufcount++;
 355
 356         req = mdc_prep_elc_req(exp, bufcount, size,
 357                                offset, &cancels, count);
 358         if (req == NULL)
 359                 RETURN(-ENOMEM);
 360
 361         mdc_link_pack(req, REQ_REC_OFF, op_data);
 362
 363         size[REPLY_REC_OFF] = sizeof(struct mdt_body);
 364         ptlrpc_req_set_repsize(req, 2, size);
 365
 366         rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
 367         *request = req;
 368         if (rc == -ERESTARTSYS)
 369                 rc = 0;
 370
 371         RETURN(rc);
 372 }
 373
 374 int mdc_rename(struct obd_export *exp, struct mdc_op_data *op_data,
 375                const char *old, int oldlen, const char *new, int newlen,
 376                struct ptlrpc_request **request)
 377 {
 378         CFS_LIST_HEAD(cancels);
 379         struct obd_device *obd = exp->exp_obd;
 380         struct ptlrpc_request *req;
 381         __u32 size[7] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
 382                         [REQ_REC_OFF] = sizeof(struct mds_rec_rename),
 383                         [REQ_REC_OFF + 1] = oldlen + 1,
 384                         [REQ_REC_OFF + 2] = newlen + 1,
 385                         [REQ_REC_OFF + 3] = sizeof(struct ldlm_request) };
 386         int count, rc, bufcount = 4;
 387         int offset = REQ_REC_OFF + 3;
 388         ENTRY;
 389
 390         if (mdc_exp_is_2_0_server(exp)) {
 391                 size[REQ_REC_OFF] = sizeof(struct mdt_rec_rename);
 392                 size[REQ_REC_OFF + 1] = 0; /* capa */
 393                 size[REQ_REC_OFF + 2] = 0; /* capa */
 394                 size[REQ_REC_OFF + 3] = oldlen + 1;
 395                 size[REQ_REC_OFF + 4] = newlen + 1;
 396                 size[REQ_REC_OFF + 5] = sizeof(struct ldlm_request);
 397                 bufcount = 6;
 398                 offset += 2;
 399         }
 400
 401         count = mdc_resource_get_unused(exp, &op_data->fid1, &cancels,
 402                                         LCK_EX, MDS_INODELOCK_UPDATE);
 403         count += mdc_resource_get_unused(exp, &op_data->fid2, &cancels,
 404                                          LCK_EX, MDS_INODELOCK_UPDATE);
 405         if (op_data->fid3.id)
 406                 count += mdc_resource_get_unused(exp, &op_data->fid3, &cancels,
 407                                                  LCK_EX, MDS_INODELOCK_LOOKUP);
 408         if (op_data->fid4.id)
 409                 count += mdc_resource_get_unused(exp, &op_data->fid4, &cancels,
 410                                                  LCK_EX, MDS_INODELOCK_FULL);
 411         if (exp_connect_cancelset(exp))
 412                 bufcount ++;
 413
 414         req = mdc_prep_elc_req(exp, bufcount, size,
 415                                offset, &cancels, count);
 416         if (req == NULL)
 417                 RETURN(-ENOMEM);
 418
 419         mdc_rename_pack(req, REQ_REC_OFF, op_data, old, oldlen, new, newlen);
 420
 421         size[REPLY_REC_OFF] = sizeof(struct mdt_body);
 422         size[REPLY_REC_OFF + 1] = obd->u.cli.cl_max_mds_easize;
 423         size[REPLY_REC_OFF + 2] = obd->u.cli.cl_max_mds_cookiesize;
 424         ptlrpc_req_set_repsize(req, 4, size);
 425
 426         rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
 427         *request = req;
 428         if (rc == -ERESTARTSYS)
 429                 rc = 0;
 430
 431         RETURN(rc);
 432 }