lustre/mds/mds_reint.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  linux/mds/mds_reint.c
   5  *  Lustre Metadata Server (mds) reintegration routines
   6  *
   7  *  Copyright (C) 2002, 2003 Cluster File Systems, Inc.
   8  *   Author: Peter Braam <braam@clusterfs.com>
   9  *   Author: Andreas Dilger <adilger@clusterfs.com>
  10  *   Author: Phil Schwan <phil@clusterfs.com>
  11  *
  12  *   This file is part of Lustre, http://www.lustre.org.
  13  *
  14  *   Lustre is free software; you can redistribute it and/or
  15  *   modify it under the terms of version 2 of the GNU General Public
  16  *   License as published by the Free Software Foundation.
  17  *
  18  *   Lustre is distributed in the hope that it will be useful,
  19  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *   GNU General Public License for more details.
  22  *
  23  *   You should have received a copy of the GNU General Public License
  24  *   along with Lustre; if not, write to the Free Software
  25  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #ifndef EXPORT_SYMTAB
  29 # define EXPORT_SYMTAB
  30 #endif
  31 #define DEBUG_SUBSYSTEM S_MDS
  32
  33 #include <linux/fs.h>
  34 #include <linux/jbd.h>
  35 #include <linux/ext3_fs.h>
  36 #include <linux/obd_support.h>
  37 #include <linux/obd_class.h>
  38 #include <linux/obd.h>
  39 #include <linux/lustre_lib.h>
  40 #include <linux/lustre_idl.h>
  41 #include <linux/lustre_mds.h>
  42 #include <linux/lustre_dlm.h>
  43 #include <linux/lustre_log.h>
  44 #include <linux/lustre_fsfilt.h>
  45 #include "mds_internal.h"
  46
  47 struct mds_logcancel_data {
  48         struct lov_mds_md      *mlcd_lmm;
  49         int                     mlcd_size;
  50         int                     mlcd_cookielen;
  51         int                     mlcd_eadatalen;
  52         struct llog_cookie      mlcd_cookies[0];
  53 };
  54
  55 static void mds_cancel_cookies_cb(struct obd_device *obd,
  56                                   __u64 transno, void *cb_data,
  57                                   int error)
  58 {
  59         struct mds_logcancel_data *mlcd = cb_data;
  60         struct lov_stripe_md *lsm = NULL;
  61         struct llog_ctxt *ctxt;
  62         int rc;
  63
  64         obd_transno_commit_cb(obd, transno, error);
  65
  66         CDEBUG(D_HA, "cancelling %d cookies\n",
  67                (int)(mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies)));
  68
  69         rc = obd_unpackmd(obd->u.mds.mds_lov_exp, &lsm, mlcd->mlcd_lmm,
  70                           mlcd->mlcd_eadatalen);
  71         if (rc < 0) {
  72                 CERROR("bad LSM cancelling %d log cookies: rc %d\n",
  73                        (int)(mlcd->mlcd_cookielen/sizeof(*mlcd->mlcd_cookies)),
  74                        rc);
  75         } else {
  76                 ///* XXX 0 normally, SENDNOW for debug */);
  77                 ctxt = llog_get_context(&obd->obd_llogs,
  78                                         mlcd->mlcd_cookies[0].lgc_subsys + 1);
  79                 rc = llog_cancel(ctxt, mlcd->mlcd_cookielen /
  80                                  sizeof(*mlcd->mlcd_cookies),
  81                                  mlcd->mlcd_cookies, OBD_LLOG_FL_SENDNOW, lsm);
  82                 if (rc)
  83                         CERROR("error cancelling %d log cookies: rc %d\n",
  84                                (int)(mlcd->mlcd_cookielen /
  85                                      sizeof(*mlcd->mlcd_cookies)), rc);
  86         }
  87
  88         OBD_FREE(mlcd, mlcd->mlcd_size);
  89 }
  90
  91 /* Assumes caller has already pushed us into the kernel context. */
  92 int mds_finish_transno(struct mds_obd *mds, struct inode *inode, void *handle,
  93                        struct ptlrpc_request *req, int rc, __u32 op_data)
  94 {
  95         struct mds_export_data *med = &req->rq_export->exp_mds_data;
  96         struct obd_device *obd = req->rq_export->exp_obd;
  97         struct mds_client_data *mcd = med->med_mcd;
  98         int err, log_pri = D_HA;
  99         __u64 transno;
 100         loff_t off;
 101         ENTRY;
 102
 103         /* if the export has already been failed, we have no last_rcvd slot */
 104         if (req->rq_export->exp_failed) {
 105                 CERROR("committing transaction for disconnected client\n");
 106                 if (handle)
 107                         GOTO(out_commit, rc);
 108                 RETURN(rc);
 109         }
 110
 111         if (IS_ERR(handle))
 112                 RETURN(rc);
 113
 114         if (handle == NULL) {
 115                 /* if we're starting our own xaction, use our own inode */
 116                 inode = mds->mds_rcvd_filp->f_dentry->d_inode;
 117                 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
 118                 if (IS_ERR(handle)) {
 119                         CERROR("fsfilt_start: %ld\n", PTR_ERR(handle));
 120                         RETURN(PTR_ERR(handle));
 121                 }
 122         }
 123
 124         off = med->med_off;
 125
 126         transno = req->rq_reqmsg->transno;
 127         if (rc != 0) {
 128                 LASSERTF(transno == 0, "BUG 3934, t"LPU64" rc %d\n", transno, rc);
 129         } else if (transno == 0) {
 130                 spin_lock(&mds->mds_transno_lock);
 131                 transno = ++mds->mds_last_transno;
 132                 spin_unlock(&mds->mds_transno_lock);
 133         } else {
 134                 spin_lock(&mds->mds_transno_lock);
 135                 if (transno > mds->mds_last_transno)
 136                         mds->mds_last_transno = transno;
 137                 spin_unlock(&mds->mds_transno_lock);
 138         }
 139         req->rq_repmsg->transno = req->rq_transno = transno;
 140         mcd->mcd_last_transno = cpu_to_le64(transno);
 141         mcd->mcd_last_xid = cpu_to_le64(req->rq_xid);
 142         mcd->mcd_last_result = cpu_to_le32(rc);
 143         mcd->mcd_last_data = cpu_to_le32(op_data);
 144
 145         fsfilt_add_journal_cb(obd, mds->mds_sb, transno, handle,
 146                               mds_commit_last_transno_cb, NULL);
 147
 148         err = fsfilt_write_record(obd, mds->mds_rcvd_filp, mcd,
 149                                   sizeof(*mcd), &off, 0);
 150
 151         if (err) {
 152                 log_pri = D_ERROR;
 153                 if (rc == 0)
 154                         rc = err;
 155         }
 156
 157         DEBUG_REQ(log_pri, req,
 158                   "wrote trans #"LPU64" client %s at idx %u: err = %d",
 159                   transno, mcd->mcd_uuid, med->med_idx, err);
 160
 161         err = mds_update_last_fid(obd, handle, 0);
 162         if (err) {
 163                 log_pri = D_ERROR;
 164                 if (rc == 0)
 165                         rc = err;
 166         }
 167
 168         err = mds_lov_write_objids(obd);
 169         if (err) {
 170                 log_pri = D_ERROR;
 171                 if (rc == 0)
 172                         rc = err;
 173         }
 174         CDEBUG(log_pri, "wrote objids: err = %d\n", err);
 175
 176 out_commit:
 177         err = fsfilt_commit(obd, mds->mds_sb, inode, handle, 0);
 178         if (err) {
 179                 CERROR("error committing transaction: %d\n", err);
 180                 if (!rc)
 181                         rc = err;
 182         }
 183
 184         RETURN(rc);
 185 }
 186
 187 /* this gives the same functionality as the code between
 188  * sys_chmod and inode_setattr
 189  * chown_common and inode_setattr
 190  * utimes and inode_setattr
 191  */
 192 int mds_fix_attr(struct inode *inode, struct mds_update_record *rec)
 193 {
 194         time_t now = LTIME_S(CURRENT_TIME);
 195         struct iattr *attr = &rec->ur_iattr;
 196         unsigned int ia_valid = attr->ia_valid;
 197         int error;
 198         ENTRY;
 199
 200         /* only fix up attrs if the client VFS didn't already */
 201         if (!(ia_valid & ATTR_RAW))
 202                 RETURN(0);
 203
 204         if (!(ia_valid & ATTR_CTIME_SET))
 205                 LTIME_S(attr->ia_ctime) = now;
 206         if (!(ia_valid & ATTR_ATIME_SET))
 207                 LTIME_S(attr->ia_atime) = now;
 208         if (!(ia_valid & ATTR_MTIME_SET))
 209                 LTIME_S(attr->ia_mtime) = now;
 210
 211         if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 212                 RETURN(-EPERM);
 213
 214         /* times */
 215         if ((ia_valid & (ATTR_MTIME|ATTR_ATIME)) == (ATTR_MTIME|ATTR_ATIME)) {
 216                 if (rec->ur_fsuid != inode->i_uid &&
 217                     (error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
 218                         RETURN(error);
 219         }
 220
 221         if (ia_valid & ATTR_SIZE) {
 222                 if ((error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
 223                         RETURN(error);
 224         }
 225
 226         if (ia_valid & ATTR_UID) {
 227                 /* chown */
 228                 error = -EPERM;
 229                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 230                         RETURN(-EPERM);
 231                 if (attr->ia_uid == (uid_t) -1)
 232                         attr->ia_uid = inode->i_uid;
 233                 if (attr->ia_gid == (gid_t) -1)
 234                         attr->ia_gid = inode->i_gid;
 235                 attr->ia_mode = inode->i_mode;
 236                 /*
 237                  * If the user or group of a non-directory has been
 238                  * changed by a non-root user, remove the setuid bit.
 239                  * 19981026 David C Niemi <niemi@tux.org>
 240                  *
 241                  * Changed this to apply to all users, including root,
 242                  * to avoid some races. This is the behavior we had in
 243                  * 2.0. The check for non-root was definitely wrong
 244                  * for 2.2 anyway, as it should have been using
 245                  * CAP_FSETID rather than fsuid -- 19990830 SD.
 246                  */
 247                 if ((inode->i_mode & S_ISUID) == S_ISUID &&
 248                     !S_ISDIR(inode->i_mode)) {
 249                         attr->ia_mode &= ~S_ISUID;
 250                         attr->ia_valid |= ATTR_MODE;
 251                 }
 252                 /*
 253                  * Likewise, if the user or group of a non-directory
 254                  * has been changed by a non-root user, remove the
 255                  * setgid bit UNLESS there is no group execute bit
 256                  * (this would be a file marked for mandatory
 257                  * locking).  19981026 David C Niemi <niemi@tux.org>
 258                  *
 259                  * Removed the fsuid check (see the comment above) --
 260                  * 19990830 SD.
 261                  */
 262                 if (((inode->i_mode & (S_ISGID | S_IXGRP)) ==
 263                      (S_ISGID | S_IXGRP)) && !S_ISDIR(inode->i_mode)) {
 264                         attr->ia_mode &= ~S_ISGID;
 265                         attr->ia_valid |= ATTR_MODE;
 266                 }
 267         } else if (ia_valid & ATTR_MODE) {
 268                 int mode = attr->ia_mode;
 269                 /* chmod */
 270                 if (attr->ia_mode == (mode_t) -1)
 271                         attr->ia_mode = inode->i_mode;
 272                 attr->ia_mode =
 273                         (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
 274         }
 275         RETURN(0);
 276 }
 277
 278 void mds_steal_ack_locks(struct ptlrpc_request *req)
 279 {
 280         struct obd_export         *exp = req->rq_export;
 281         struct list_head          *tmp;
 282         struct ptlrpc_reply_state *oldrep;
 283         struct ptlrpc_service     *svc;
 284         struct llog_create_locks  *lcl;
 285         unsigned long              flags;
 286         char                       str[PTL_NALFMT_SIZE];
 287         int                        i;
 288
 289         /* CAVEAT EMPTOR: spinlock order */
 290         spin_lock_irqsave (&exp->exp_lock, flags);
 291         list_for_each (tmp, &exp->exp_outstanding_replies) {
 292                 oldrep = list_entry(tmp, struct ptlrpc_reply_state,rs_exp_list);
 293
 294                 if (oldrep->rs_xid != req->rq_xid)
 295                         continue;
 296
 297                 if (oldrep->rs_msg.opc != req->rq_reqmsg->opc)
 298                         CERROR ("Resent req xid "LPX64" has mismatched opc: "
 299                                 "new %d old %d\n", req->rq_xid,
 300                                 req->rq_reqmsg->opc, oldrep->rs_msg.opc);
 301
 302                 svc = oldrep->rs_srv_ni->sni_service;
 303                 spin_lock (&svc->srv_lock);
 304
 305                 list_del_init (&oldrep->rs_exp_list);
 306
 307                 CWARN("Stealing %d locks from rs %p x"LPD64".t"LPD64
 308                       " o%d NID %s\n",
 309                       oldrep->rs_nlocks, oldrep,
 310                       oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_msg.opc,
 311                       ptlrpc_peernid2str(&exp->exp_connection->c_peer, str));
 312
 313                 for (i = 0; i < oldrep->rs_nlocks; i++)
 314                         ptlrpc_save_lock(req,
 315                                          &oldrep->rs_locks[i],
 316                                          oldrep->rs_modes[i]);
 317                 oldrep->rs_nlocks = 0;
 318
 319                 lcl = oldrep->rs_llog_locks;
 320                 oldrep->rs_llog_locks = NULL;
 321                 if (lcl != NULL)
 322                         ptlrpc_save_llog_lock(req, lcl);
 323
 324                 DEBUG_REQ(D_HA, req, "stole locks for");
 325                 ptlrpc_schedule_difficult_reply (oldrep);
 326
 327                 spin_unlock (&svc->srv_lock);
 328                 spin_unlock_irqrestore (&exp->exp_lock, flags);
 329                 return;
 330         }
 331         spin_unlock_irqrestore (&exp->exp_lock, flags);
 332 }
 333
 334 void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd)
 335 {
 336         DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
 337                   mcd->mcd_last_transno, mcd->mcd_last_result);
 338         req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_transno;
 339         req->rq_repmsg->status = req->rq_status = mcd->mcd_last_result;
 340
 341         mds_steal_ack_locks(req);
 342 }
 343
 344 static void reconstruct_reint_setattr(struct mds_update_record *rec,
 345                                       int offset, struct ptlrpc_request *req)
 346 {
 347         struct mds_export_data *med = &req->rq_export->exp_mds_data;
 348         struct mds_body *body;
 349         struct dentry *de;
 350
 351         mds_req_from_mcd(req, med->med_mcd);
 352
 353         de = mds_id2dentry(req2obd(req), rec->ur_id1, NULL);
 354         if (IS_ERR(de)) {
 355                 LASSERT(PTR_ERR(de) == req->rq_status);
 356                 return;
 357         }
 358
 359         body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
 360         mds_pack_inode2body(req2obd(req), body, de->d_inode, 0);
 361
 362         /* Don't return OST-specific attributes if we didn't just set them */
 363         if (rec->ur_iattr.ia_valid & ATTR_SIZE)
 364                 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
 365         if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
 366                 body->valid |= OBD_MD_FLMTIME;
 367         if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
 368                 body->valid |= OBD_MD_FLATIME;
 369
 370         l_dput(de);
 371 }
 372
 373 /* In the raw-setattr case, we lock the child inode.
 374  * In the write-back case or if being called from open, the client holds a lock
 375  * already.
 376  *
 377  * We use the ATTR_FROM_OPEN flag to tell these cases apart. */
 378 static int mds_reint_setattr(struct mds_update_record *rec, int offset,
 379                              struct ptlrpc_request *req, struct lustre_handle *lh)
 380 {
 381         struct mds_obd *mds = mds_req2mds(req);
 382         struct obd_device *obd = req->rq_export->exp_obd;
 383         struct mds_body *body;
 384         struct dentry *de;
 385         struct inode *inode = NULL;
 386         struct lustre_handle lockh[2] = {{0}, {0}};
 387         int parent_mode;
 388         void *handle = NULL;
 389         struct mds_logcancel_data *mlcd = NULL;
 390         int rc = 0, cleanup_phase = 0, err;
 391         int locked = 0;
 392         ENTRY;
 393
 394         LASSERT(offset == 1);
 395
 396         DEBUG_REQ(D_INODE, req, "setattr "LPU64"/%u %x",
 397                   id_ino(rec->ur_id1), id_gen(rec->ur_id1),
 398                   rec->ur_iattr.ia_valid);
 399
 400         MDS_CHECK_RESENT(req, reconstruct_reint_setattr(rec, offset, req));
 401
 402         MDS_UPDATE_COUNTER(mds, MDS_SETATTR_COUNT);
 403
 404         if (rec->ur_iattr.ia_valid & ATTR_FROM_OPEN) {
 405                 de = mds_id2dentry(obd, rec->ur_id1, NULL);
 406                 if (IS_ERR(de))
 407                         GOTO(cleanup, rc = PTR_ERR(de));
 408         } else {
 409                 __u64 lockpart = MDS_INODELOCK_UPDATE;
 410                 if (rec->ur_iattr.ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID))
 411                         lockpart |= MDS_INODELOCK_LOOKUP;
 412                 de = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW,
 413                                           lockh, &parent_mode, NULL, 0, lockpart);
 414                 if (IS_ERR(de))
 415                         GOTO(cleanup, rc = PTR_ERR(de));
 416                 locked = 1;
 417         }
 418
 419         cleanup_phase = 1;
 420
 421         inode = de->d_inode;
 422         LASSERT(inode);
 423         if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
 424             rec->ur_eadata != NULL)
 425                 down(&inode->i_sem);
 426
 427         OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb);
 428
 429         handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
 430         if (IS_ERR(handle))
 431                 GOTO(cleanup, rc = PTR_ERR(handle));
 432
 433         if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
 434                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n",
 435                        LTIME_S(rec->ur_iattr.ia_mtime),
 436                        LTIME_S(rec->ur_iattr.ia_ctime));
 437         rc = mds_fix_attr(inode, rec);
 438         if (rc)
 439                 GOTO(cleanup, rc);
 440
 441         if (rec->ur_iattr.ia_valid & ATTR_ATTR_FLAG)    /* ioctl */
 442                 rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_SETFLAGS,
 443                                       (long)&rec->ur_iattr.ia_attr_flags);
 444         else                                            /* setattr */
 445                 rc = fsfilt_setattr(obd, de, handle, &rec->ur_iattr, 0);
 446
 447         if (rc == 0 && (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
 448             rec->ur_eadata != NULL) {
 449                 struct lov_stripe_md *lsm = NULL;
 450
 451                 rc = ll_permission(inode, MAY_WRITE, NULL);
 452                 if (rc < 0)
 453                         GOTO(cleanup, rc);
 454
 455                 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE, mds->mds_lov_exp,
 456                                    0, &lsm, rec->ur_eadata);
 457                 if (rc)
 458                         GOTO(cleanup, rc);
 459
 460                 obd_free_memmd(mds->mds_lov_exp, &lsm);
 461
 462                 rc = fsfilt_set_md(obd, inode, handle, rec->ur_eadata,
 463                                    rec->ur_eadatalen);
 464                 if (rc)
 465                         GOTO(cleanup, rc);
 466         }
 467
 468         body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
 469         mds_pack_inode2body(obd, body, inode, 0);
 470         body->id1 = *rec->ur_id1;
 471
 472         /* Don't return OST-specific attributes if we didn't just set them */
 473         if (rec->ur_iattr.ia_valid & ATTR_SIZE)
 474                 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
 475         if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
 476                 body->valid |= OBD_MD_FLMTIME;
 477         if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
 478                 body->valid |= OBD_MD_FLATIME;
 479
 480         if (rc == 0 && rec->ur_cookielen && !IS_ERR(mds->mds_lov_obd)) {
 481                 OBD_ALLOC(mlcd, sizeof(*mlcd) + rec->ur_cookielen +
 482                           rec->ur_eadatalen);
 483                 if (mlcd) {
 484                         mlcd->mlcd_size = sizeof(*mlcd) + rec->ur_cookielen +
 485                                 rec->ur_eadatalen;
 486                         mlcd->mlcd_eadatalen = rec->ur_eadatalen;
 487                         mlcd->mlcd_cookielen = rec->ur_cookielen;
 488                         mlcd->mlcd_lmm = (void *)&mlcd->mlcd_cookies +
 489                                 mlcd->mlcd_cookielen;
 490                         memcpy(&mlcd->mlcd_cookies, rec->ur_logcookies,
 491                                mlcd->mlcd_cookielen);
 492                         memcpy(mlcd->mlcd_lmm, rec->ur_eadata,
 493                                mlcd->mlcd_eadatalen);
 494                 } else {
 495                         CERROR("unable to allocate log cancel data\n");
 496                 }
 497         }
 498         EXIT;
 499  cleanup:
 500         if (mlcd != NULL)
 501                 fsfilt_add_journal_cb(req->rq_export->exp_obd, mds->mds_sb, 0,
 502                                       handle, mds_cancel_cookies_cb, mlcd);
 503         err = mds_finish_transno(mds, inode, handle, req, rc, 0);
 504         switch (cleanup_phase) {
 505         case 1:
 506                 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
 507                     rec->ur_eadata != NULL)
 508                         up(&inode->i_sem);
 509                 l_dput(de);
 510                 if (locked) {
 511 #ifdef S_PDIROPS
 512                         if (lockh[1].cookie != 0)
 513                                 ldlm_lock_decref(lockh + 1, parent_mode);
 514 #endif
 515                         if (rc) {
 516                                 ldlm_lock_decref(lockh, LCK_PW);
 517                         } else {
 518                                 ptlrpc_save_lock (req, lockh, LCK_PW);
 519                         }
 520                 }
 521         case 0:
 522                 break;
 523         default:
 524                 LBUG();
 525         }
 526         if (err && !rc)
 527                 rc = err;
 528
 529         req->rq_status = rc;
 530         return 0;
 531 }
 532
 533 static void reconstruct_reint_create(struct mds_update_record *rec, int offset,
 534                                      struct ptlrpc_request *req)
 535 {
 536         struct mds_export_data *med = &req->rq_export->exp_mds_data;
 537         struct dentry *parent, *child;
 538         struct mds_body *body;
 539         ENTRY;
 540
 541         mds_req_from_mcd(req, med->med_mcd);
 542
 543         if (req->rq_status) {
 544                 EXIT;
 545                 return;
 546         }
 547
 548         parent = mds_id2dentry(req2obd(req), rec->ur_id1, NULL);
 549         LASSERT(!IS_ERR(parent));
 550         child = ll_lookup_one_len(rec->ur_name, parent,
 551                                   rec->ur_namelen - 1);
 552         LASSERT(!IS_ERR(child));
 553         if ((child->d_flags & DCACHE_CROSS_REF)) {
 554                 LASSERTF(child->d_inode == NULL, "BUG 3869\n");
 555                 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
 556                 mds_pack_dentry2body(req2obd(req), body, child, 1);
 557         } else if (child->d_inode == NULL) {
 558                 DEBUG_REQ(D_ERROR, req, "parent "DLID4" name %s mode %o",
 559                           OLID4(rec->ur_id1), rec->ur_name, rec->ur_mode);
 560                 LASSERTF(child->d_inode != NULL, "BUG 3869\n");
 561         } else {
 562                 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
 563                 mds_pack_inode2body(req2obd(req), body, child->d_inode, 1);
 564         }
 565         l_dput(parent);
 566         l_dput(child);
 567         EXIT;
 568 }
 569
 570 static int mds_reint_create(struct mds_update_record *rec, int offset,
 571                             struct ptlrpc_request *req,
 572                             struct lustre_handle *lh)
 573 {
 574         struct dentry *dparent = NULL;
 575         struct mds_obd *mds = mds_req2mds(req);
 576         struct obd_device *obd = req->rq_export->exp_obd;
 577         struct dentry *dchild = NULL;
 578         struct inode *dir = NULL;
 579         void *handle = NULL;
 580         struct lustre_handle lockh[2] = {{0}, {0}};
 581         int parent_mode;
 582         int rc = 0, err, type = rec->ur_mode & S_IFMT, cleanup_phase = 0;
 583         int created = 0;
 584         struct dentry_params dp;
 585         struct mea *mea = NULL;
 586         int mea_size;
 587         ENTRY;
 588
 589         LASSERT(offset == 1);
 590
 591         LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name,
 592                         LUSTRE_MDS_NAME));
 593
 594         DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u name %s mode %o",
 595                   id_ino(rec->ur_id1), id_gen(rec->ur_id1),
 596                   rec->ur_name, rec->ur_mode);
 597
 598         MDS_CHECK_RESENT(req, reconstruct_reint_create(rec, offset, req));
 599
 600         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
 601                 GOTO(cleanup, rc = -ESTALE);
 602
 603         dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW,
 604                                        lockh, &parent_mode, rec->ur_name,
 605                                        rec->ur_namelen - 1, MDS_INODELOCK_UPDATE);
 606         if (IS_ERR(dparent)) {
 607                 rc = PTR_ERR(dparent);
 608                 CERROR("parent lookup error %d\n", rc);
 609                 GOTO(cleanup, rc);
 610         }
 611         cleanup_phase = 1; /* locked parent dentry */
 612         dir = dparent->d_inode;
 613         LASSERT(dir);
 614
 615         ldlm_lock_dump_handle(D_OTHER, lockh);
 616
 617         /* try to retrieve MEA data for this dir */
 618         rc = mds_get_lmv_attr(obd, dparent->d_inode, &mea, &mea_size);
 619         if (rc)
 620                 GOTO(cleanup, rc);
 621
 622         if (mea != NULL) {
 623                 /*
 624                  * dir is already splitted, check is requested filename should
 625                  * live at this MDS or at another one.
 626                  */
 627                 int i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
 628                 if (mea->mea_master != id_group(&mea->mea_ids[i])) {
 629                         CDEBUG(D_OTHER, "inapropriate MDS(%d) for %lu/%u:%s."
 630                                " should be %lu(%d)\n",
 631                                mea->mea_master, dparent->d_inode->i_ino,
 632                                dparent->d_inode->i_generation, rec->ur_name,
 633                                (unsigned long)id_group(&mea->mea_ids[i]), i);
 634                         GOTO(cleanup, rc = -ERESTART);
 635                 }
 636         }
 637
 638         dchild = ll_lookup_one_len(rec->ur_name, dparent,
 639                                    rec->ur_namelen - 1);
 640         if (IS_ERR(dchild)) {
 641                 rc = PTR_ERR(dchild);
 642                 CERROR("Can't find "DLID4"/%s, error %d\n",
 643                        OLID4(rec->ur_id1), rec->ur_name, rc);
 644                 GOTO(cleanup, rc);
 645         }
 646
 647         cleanup_phase = 2; /* child dentry */
 648
 649         OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb);
 650
 651         if (type == S_IFREG || type == S_IFDIR) {
 652                 rc = mds_try_to_split_dir(obd, dparent, &mea, 0, parent_mode);
 653                 CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d/%d\n",
 654                        obd->obd_name, dparent->d_inode->i_ino,
 655                        dparent->d_inode->i_generation, rc, parent_mode);
 656                 if (rc > 0) {
 657                         /* dir got splitted */
 658                         GOTO(cleanup, rc = -ERESTART);
 659                 } else if (rc < 0) {
 660                         /* error happened during spitting. */
 661                         GOTO(cleanup, rc);
 662                 }
 663         }
 664
 665         if (dir->i_mode & S_ISGID) {
 666                 if (S_ISDIR(rec->ur_mode))
 667                         rec->ur_mode |= S_ISGID;
 668         }
 669
 670         /*
 671          * here inode number should be used only in the case of replaying. It is
 672          * needed to check if object already created in the case of creating
 673          * remote inode.
 674          */
 675         dchild->d_fsdata = (void *)&dp;
 676         dp.p_inum = (unsigned long)id_ino(rec->ur_id2);
 677         dp.p_ptr = req;
 678
 679         switch (type) {
 680         case S_IFREG:{
 681                 handle = fsfilt_start(obd, dir, FSFILT_OP_CREATE, NULL);
 682                 if (IS_ERR(handle))
 683                         GOTO(cleanup, rc = PTR_ERR(handle));
 684                 rc = ll_vfs_create(dir, dchild, rec->ur_mode, NULL);
 685                 EXIT;
 686                 break;
 687         }
 688         case S_IFDIR:{
 689                 int i, nstripes = 0;
 690                 struct lustre_id sid;
 691
 692                 /*
 693                  * as Peter asked, mkdir() should distribute new directories
 694                  * over the whole cluster in order to distribute namespace
 695                  * processing load. first, we calculate which MDS to use to put
 696                  * new directory's inode in.
 697                  */
 698                 i = mds_choose_mdsnum(obd, rec->ur_name, rec->ur_namelen - 1,
 699                                       rec->ur_flags);
 700                 if (i == mds->mds_num) {
 701                         /* inode will be created locally */
 702                         handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
 703                         if (IS_ERR(handle))
 704                                 GOTO(cleanup, rc = PTR_ERR(handle));
 705
 706                         rc = vfs_mkdir(dir, dchild, rec->ur_mode);
 707                         if (rc) {
 708                                 CERROR("Can't create dir %s, rc = %d\n",
 709                                        dchild->d_name.name, rc);
 710                                 GOTO(cleanup, rc);
 711                         }
 712
 713                         down(&dchild->d_inode->i_sem);
 714                         if (dp.p_inum) {
 715                                 rc = mds_update_inode_sid(obd, dchild->d_inode,
 716                                                           handle, rec->ur_id2);
 717                                 if (rc) {
 718                                         CERROR("mds_update_inode_sid() failed, inode %lu, "
 719                                                "rc %d\n", dchild->d_inode->i_ino, rc);
 720                                 }
 721
 722                                 /*
 723                                  * make sure, that fid is up-to-date.
 724                                  */
 725                                 mds_set_last_fid(obd, id_fid(rec->ur_id2));
 726                         } else {
 727                                 rc = mds_alloc_inode_sid(obd, dchild->d_inode,
 728                                                          handle, &sid);
 729                                 if (rc) {
 730                                         CERROR("mds_alloc_inode_sid() failed, inode %lu, "
 731                                                "rc %d\n", dchild->d_inode->i_ino, rc);
 732                                 }
 733                         }
 734                         up(&dchild->d_inode->i_sem);
 735
 736                         if (rc)
 737                                 GOTO(cleanup, rc);
 738
 739                         if (rec->ur_eadata)
 740                                 nstripes = *(u16 *)rec->ur_eadata;
 741
 742                         if (rc == 0 && nstripes) {
 743                                 /* we pass LCK_EX to split routine to signal,
 744                                  * that we have exclusive access to the
 745                                  * directory. Simple because nobody knows it
 746                                  * already exists -bzzz */
 747                                 rc = mds_try_to_split_dir(obd, dchild,
 748                                                           NULL, nstripes,
 749                                                           LCK_EX);
 750                                 if (rc > 0) {
 751                                         /* dir got splitted */
 752                                         rc = 0;
 753                                 } else if (rc < 0) {
 754                                         /* an error occured during
 755                                          * splitting. */
 756                                         GOTO(cleanup, rc);
 757                                 }
 758                         }
 759                 } else if (!DENTRY_VALID(dchild)) {
 760                         /* inode will be created on another MDS */
 761                         struct obdo *oa = NULL;
 762                         struct mds_body *body;
 763
 764                         /* first, create that inode */
 765                         oa = obdo_alloc();
 766                         if (!oa)
 767                                 GOTO(cleanup, rc = -ENOMEM);
 768
 769                         oa->o_mds = i;
 770                         oa->o_easize = 0;
 771
 772                         if (rec->ur_eadata) {
 773                                 /* user asks for creating splitted dir */
 774                                 oa->o_easize = *((u16 *) rec->ur_eadata);
 775                         }
 776
 777                         obdo_from_inode(oa, dir, OBD_MD_FLTYPE | OBD_MD_FLATIME |
 778                                         OBD_MD_FLMTIME | OBD_MD_FLCTIME |
 779                                         OBD_MD_FLUID | OBD_MD_FLGID);
 780
 781                         oa->o_mode = dir->i_mode;
 782
 783                         CDEBUG(D_OTHER, "%s: create dir on MDS %u\n",
 784                                obd->obd_name, i);
 785
 786                         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
 787                                 /*
 788                                  * here inode number and generation are
 789                                  * important, as this is replay request and we
 790                                  * need them to check if such an object is
 791                                  * already created.
 792                                  */
 793                                 CDEBUG(D_HA, "%s: replay dir creation %*s -> %u/%u\n",
 794                                        obd->obd_name, rec->ur_namelen - 1,
 795                                        rec->ur_name, (unsigned)id_ino(rec->ur_id2),
 796                                        (unsigned)id_gen(rec->ur_id2));
 797                                 oa->o_id = id_ino(rec->ur_id2);
 798                                 oa->o_fid = id_fid(rec->ur_id2);
 799                                 oa->o_generation = id_gen(rec->ur_id2);
 800                                 oa->o_flags |= OBD_FL_RECREATE_OBJS;
 801                         }
 802
 803                         /* before obd_create() is called, o_fid is not known. */
 804                         rc = obd_create(mds->mds_lmv_exp, oa, NULL, NULL);
 805                         if (rc) {
 806                                 CERROR("can't create remote inode: %d\n", rc);
 807                                 DEBUG_REQ(D_ERROR, req, "parent "LPU64"/%u name %s mode %o",
 808                                           id_ino(rec->ur_id1), id_gen(rec->ur_id1),
 809                                           rec->ur_name, rec->ur_mode);
 810                                 obdo_free(oa);
 811                                 GOTO(cleanup, rc);
 812                         }
 813
 814                         /* now, add new dir entry for it */
 815                         handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
 816                         if (IS_ERR(handle)) {
 817                                 obdo_free(oa);
 818                                 GOTO(cleanup, rc = PTR_ERR(handle));
 819                         }
 820
 821                         /* creating local dentry for remote inode. */
 822                         rc = fsfilt_add_dir_entry(obd, dparent, rec->ur_name,
 823                                                   rec->ur_namelen - 1, oa->o_id,
 824                                                   oa->o_generation, i, oa->o_fid);
 825
 826                         if (rc) {
 827                                 CERROR("Can't create local entry %*s for "
 828                                        "remote inode.\n", rec->ur_namelen - 1,
 829                                         rec->ur_name);
 830                                 GOTO(cleanup, rc);
 831                         }
 832
 833                         /* fill reply */
 834                         body = lustre_msg_buf(req->rq_repmsg,
 835                                               0, sizeof(*body));
 836                         body->valid |= OBD_MD_FLID | OBD_MD_MDS |
 837                                 OBD_MD_FID;
 838
 839                         id_group(&body->id1) = i;
 840                         id_ino(&body->id1) = oa->o_id;
 841                         id_fid(&body->id1) = oa->o_fid;
 842                         id_gen(&body->id1) = oa->o_generation;
 843                         obdo_free(oa);
 844                 } else {
 845                         /* requested name exists in the directory */
 846                         rc = -EEXIST;
 847                 }
 848                 EXIT;
 849                 break;
 850         }
 851         case S_IFLNK:{
 852                 handle = fsfilt_start(obd, dir, FSFILT_OP_SYMLINK, NULL);
 853                 if (IS_ERR(handle))
 854                         GOTO(cleanup, rc = PTR_ERR(handle));
 855                 if (rec->ur_tgt == NULL)        /* no target supplied */
 856                         rc = -EINVAL;           /* -EPROTO? */
 857                 else
 858                         rc = ll_vfs_symlink(dir, dchild, rec->ur_tgt, S_IALLUGO);
 859                 EXIT;
 860                 break;
 861         }
 862         case S_IFCHR:
 863         case S_IFBLK:
 864         case S_IFIFO:
 865         case S_IFSOCK:{
 866                 int rdev = rec->ur_rdev;
 867                 handle = fsfilt_start(obd, dir, FSFILT_OP_MKNOD, NULL);
 868                 if (IS_ERR(handle))
 869                         GOTO(cleanup, (handle = NULL, rc = PTR_ERR(handle)));
 870                 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
 871                 EXIT;
 872                 break;
 873         }
 874         default:
 875                 CERROR("bad file type %o creating %s\n", type, rec->ur_name);
 876                 dchild->d_fsdata = NULL;
 877                 GOTO(cleanup, rc = -EINVAL);
 878         }
 879
 880         /* In case we stored the desired inum in here, we want to clean up. */
 881         if (dchild->d_fsdata == (void *)(unsigned long)id_ino(rec->ur_id2))
 882                 dchild->d_fsdata = NULL;
 883
 884         if (rc) {
 885                 CDEBUG(D_INODE, "error during create: %d\n", rc);
 886                 GOTO(cleanup, rc);
 887         } else if (dchild->d_inode) {
 888                 struct iattr iattr;
 889                 struct mds_body *body;
 890                 struct inode *inode = dchild->d_inode;
 891
 892                 created = 1;
 893                 iattr.ia_uid = rec->ur_fsuid;
 894                 LTIME_S(iattr.ia_atime) = rec->ur_time;
 895                 LTIME_S(iattr.ia_ctime) = rec->ur_time;
 896                 LTIME_S(iattr.ia_mtime) = rec->ur_time;
 897
 898                 if (dir->i_mode & S_ISGID)
 899                         iattr.ia_gid = dir->i_gid;
 900                 else
 901                         iattr.ia_gid = rec->ur_fsgid;
 902
 903                 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
 904                         ATTR_MTIME | ATTR_CTIME;
 905
 906                 if (id_ino(rec->ur_id2)) {
 907                         LASSERT(id_ino(rec->ur_id2) == inode->i_ino);
 908                         inode->i_generation = id_gen(rec->ur_id2);
 909
 910                         if (type != S_IFDIR) {
 911                                 /*
 912                                  * updating inode self id, as inode already
 913                                  * exists and we should make sure, its sid will
 914                                  * be the same as we reveived.
 915                                  */
 916                                 down(&inode->i_sem);
 917                                 rc = mds_update_inode_sid(obd, inode,
 918                                                           handle, rec->ur_id2);
 919                                 up(&inode->i_sem);
 920                                 if (rc) {
 921                                         CERROR("Can't update inode self id, "
 922                                                "rc = %d.\n", rc);
 923                                 }
 924
 925                                 /*
 926                                  * make sure, that fid is up-to-date.
 927                                  */
 928                                 mds_set_last_fid(obd, id_fid(rec->ur_id2));
 929                         }
 930
 931                         /* dirtied and committed by the upcoming setattr. */
 932                         CDEBUG(D_INODE, "recreated ino %lu with gen %u\n",
 933                                inode->i_ino, inode->i_generation);
 934                 } else {
 935                         struct lustre_handle child_ino_lockh;
 936
 937                         CDEBUG(D_INODE, "created ino %lu with gen %x\n",
 938                                inode->i_ino, inode->i_generation);
 939
 940                         if (type != S_IFDIR) {
 941                                 struct lustre_id sid;
 942
 943                                 /*
 944                                  * allocate new id for @inode if it is not dir,
 945                                  * because for dir it was already done.
 946                                  */
 947                                 down(&inode->i_sem);
 948                                 rc = mds_alloc_inode_sid(obd, inode,
 949                                                          handle, &sid);
 950                                 up(&inode->i_sem);
 951                                 if (rc) {
 952                                         CERROR("mds_alloc_inode_sid() failed, "
 953                                                "inode %lu, rc %d\n", inode->i_ino,
 954                                                rc);
 955                                 }
 956                         }
 957
 958                         if (rc == 0) {
 959                                 /*
 960                                  * the inode we were allocated may have just
 961                                  * been freed by an unlink operation.  We take
 962                                  * this lock to synchronize against the matching
 963                                  * reply-ack-lock taken in unlink, to avoid
 964                                  * replay problems if this reply makes it out to
 965                                  * the client but the unlink's does not.  See
 966                                  * bug 2029 for more detail.
 967                                  */
 968                                 rc = mds_lock_new_child(obd, inode, &child_ino_lockh);
 969                                 if (rc != ELDLM_OK) {
 970                                         CERROR("error locking for unlink/create sync: "
 971                                                "%d\n", rc);
 972                                 } else {
 973                                         ldlm_lock_decref(&child_ino_lockh, LCK_EX);
 974                                 }
 975                         }
 976                 }
 977
 978                 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
 979                 if (rc)
 980                         CERROR("error on child setattr: rc = %d\n", rc);
 981
 982                 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
 983                 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
 984                 if (rc)
 985                         CERROR("error on parent setattr: rc = %d\n", rc);
 986                 else
 987                         MDS_UPDATE_COUNTER(mds, MDS_CREATE_COUNT);
 988
 989                 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
 990                 mds_pack_inode2body(obd, body, inode, 1);
 991         }
 992         EXIT;
 993
 994 cleanup:
 995         err = mds_finish_transno(mds, dir, handle, req, rc, 0);
 996
 997         if (rc && created) {
 998                 /* Destroy the file we just created. This should not need extra
 999                  * journal credits, as we have already modified all of the
1000                  * blocks needed in order to create the file in the first
1001                  * place. */
1002                 switch (type) {
1003                 case S_IFDIR:
1004                         err = vfs_rmdir(dir, dchild);
1005                         if (err)
1006                                 CERROR("rmdir in error path: %d\n", err);
1007                         break;
1008                 default:
1009                         err = vfs_unlink(dir, dchild);
1010                         if (err)
1011                                 CERROR("unlink in error path: %d\n", err);
1012                         break;
1013                 }
1014         } else {
1015                 rc = err;
1016         }
1017         switch (cleanup_phase) {
1018         case 2: /* child dentry */
1019                 l_dput(dchild);
1020         case 1: /* locked parent dentry */
1021 #ifdef S_PDIROPS
1022                 if (lockh[1].cookie != 0)
1023                         ldlm_lock_decref(lockh + 1, parent_mode);
1024 #endif
1025                 if (rc) {
1026                         ldlm_lock_decref(lockh, LCK_PW);
1027                 } else {
1028                         ptlrpc_save_lock(req, lockh, LCK_PW);
1029                 }
1030                 l_dput(dparent);
1031         case 0:
1032                 break;
1033         default:
1034                 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1035                 LBUG();
1036         }
1037         if (mea)
1038                 OBD_FREE(mea, mea_size);
1039         req->rq_status = rc;
1040         return 0;
1041 }
1042
1043 static inline int
1044 res_gt(struct ldlm_res_id *res1, struct ldlm_res_id *res2,
1045        ldlm_policy_data_t *p1, ldlm_policy_data_t *p2)
1046 {
1047         int i;
1048
1049         for (i = 0; i < RES_NAME_SIZE; i++) {
1050                 /*
1051                  * this is needed to make zeroed res_id entries to be put at the
1052                  * end of list in *ordered_locks() .
1053                  */
1054                 if (res1->name[i] == 0 && res2->name[i] != 0)
1055                         return 1;
1056                 if (res2->name[i] == 0 && res1->name[i] != 0)
1057                         return 0;
1058                 if (res1->name[i] > res2->name[i])
1059                         return 1;
1060                 if (res1->name[i] < res2->name[i])
1061                         return 0;
1062         }
1063
1064         if (!p1 || !p2)
1065                 return 0;
1066
1067         if (memcmp(p1, p2, sizeof(*p1)) < 0)
1068                 return 1;
1069
1070         return 0;
1071 }
1072
1073 /* This function doesn't use ldlm_match_or_enqueue because we're always called
1074  * with EX or PW locks, and the MDS is no longer allowed to match write locks,
1075  * because they take the place of local semaphores.
1076  *
1077  * One or two locks are taken in numerical order.  A res_id->name[0] of 0 means
1078  * no lock is taken for that res_id.  Must be at least one non-zero res_id. */
1079 int enqueue_ordered_locks(struct obd_device *obd, struct ldlm_res_id *p1_res_id,
1080                           struct lustre_handle *p1_lockh, int p1_lock_mode,
1081                           ldlm_policy_data_t *p1_policy,
1082                           struct ldlm_res_id *p2_res_id,
1083                           struct lustre_handle *p2_lockh, int p2_lock_mode,
1084                           ldlm_policy_data_t *p2_policy)
1085 {
1086         int lock_modes[2] = { p1_lock_mode, p2_lock_mode };
1087         struct ldlm_res_id *res_id[2] = { p1_res_id, p2_res_id };
1088         struct lustre_handle *handles[2] = { p1_lockh, p2_lockh };
1089         ldlm_policy_data_t *policies[2] = { p1_policy, p2_policy };
1090         int rc, flags;
1091         ENTRY;
1092
1093         LASSERT(p1_res_id != NULL && p2_res_id != NULL);
1094
1095         CDEBUG(D_INFO, "locks before: "LPU64"/"LPU64"\n",
1096                res_id[0]->name[0], res_id[1]->name[0]);
1097
1098         if (res_gt(p1_res_id, p2_res_id, p1_policy, p2_policy)) {
1099                 handles[1] = p1_lockh;
1100                 handles[0] = p2_lockh;
1101                 res_id[1] = p1_res_id;
1102                 res_id[0] = p2_res_id;
1103                 lock_modes[1] = p1_lock_mode;
1104                 lock_modes[0] = p2_lock_mode;
1105                 policies[1] = p1_policy;
1106                 policies[0] = p2_policy;
1107         }
1108
1109         CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"\n",
1110                res_id[0]->name[0], res_id[1]->name[0]);
1111
1112         flags = LDLM_FL_LOCAL_ONLY;
1113         rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, *res_id[0],
1114                               LDLM_IBITS, policies[0], lock_modes[0], &flags,
1115                               mds_blocking_ast, ldlm_completion_ast, NULL, NULL,
1116                               NULL, 0, NULL, handles[0]);
1117         if (rc != ELDLM_OK)
1118                 RETURN(-EIO);
1119         ldlm_lock_dump_handle(D_OTHER, handles[0]);
1120
1121         if (!memcmp(res_id[0], res_id[1], sizeof(*res_id[0])) &&
1122             (policies[0]->l_inodebits.bits & policies[1]->l_inodebits.bits)) {
1123                 memcpy(handles[1], handles[0], sizeof(*(handles[1])));
1124                 ldlm_lock_addref(handles[1], lock_modes[1]);
1125         } else if (res_id[1]->name[0] != 0) {
1126                 flags = LDLM_FL_LOCAL_ONLY;
1127                 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1128                                       *res_id[1], LDLM_IBITS, policies[1],
1129                                       lock_modes[1], &flags, mds_blocking_ast,
1130                                       ldlm_completion_ast, NULL, NULL, NULL, 0,
1131                                       NULL, handles[1]);
1132                 if (rc != ELDLM_OK) {
1133                         ldlm_lock_decref(handles[0], lock_modes[0]);
1134                         RETURN(-EIO);
1135                 }
1136                 ldlm_lock_dump_handle(D_OTHER, handles[1]);
1137         }
1138
1139         RETURN(0);
1140 }
1141
1142 int enqueue_4ordered_locks(struct obd_device *obd,struct ldlm_res_id *p1_res_id,
1143                            struct lustre_handle *p1_lockh, int p1_lock_mode,
1144                            ldlm_policy_data_t *p1_policy,
1145                            struct ldlm_res_id *p2_res_id,
1146                            struct lustre_handle *p2_lockh, int p2_lock_mode,
1147                            ldlm_policy_data_t *p2_policy,
1148                            struct ldlm_res_id *c1_res_id,
1149                            struct lustre_handle *c1_lockh, int c1_lock_mode,
1150                            ldlm_policy_data_t *c1_policy,
1151                            struct ldlm_res_id *c2_res_id,
1152                            struct lustre_handle *c2_lockh, int c2_lock_mode,
1153                            ldlm_policy_data_t *c2_policy)
1154 {
1155         struct ldlm_res_id *res_id[5] = { p1_res_id, p2_res_id,
1156                                           c1_res_id, c2_res_id };
1157         struct lustre_handle *dlm_handles[5] = { p1_lockh, p2_lockh,
1158                                                  c1_lockh, c2_lockh };
1159         int lock_modes[5] = { p1_lock_mode, p2_lock_mode,
1160                               c1_lock_mode, c2_lock_mode };
1161         ldlm_policy_data_t *policies[5] = { p1_policy, p2_policy,
1162                                             c1_policy, c2_policy};
1163         int rc, i, j, sorted, flags;
1164         ENTRY;
1165
1166         CDEBUG(D_DLMTRACE, "locks before: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1167                res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1168                res_id[3]->name[0]);
1169
1170         /*
1171          * simple insertion sort - we have at most 4 elements. Note, that zeroed
1172          * res_id should be at the end of list after sorting is finished.
1173          */
1174         for (i = 1; i < 4; i++) {
1175                 j = i - 1;
1176                 dlm_handles[4] = dlm_handles[i];
1177                 res_id[4] = res_id[i];
1178                 lock_modes[4] = lock_modes[i];
1179                 policies[4] = policies[i];
1180
1181                 sorted = 0;
1182                 do {
1183                         if (res_gt(res_id[j], res_id[4], policies[j],
1184                                    policies[4])) {
1185                                 dlm_handles[j + 1] = dlm_handles[j];
1186                                 res_id[j + 1] = res_id[j];
1187                                 lock_modes[j + 1] = lock_modes[j];
1188                                 policies[j + 1] = policies[j];
1189                                 j--;
1190                         } else {
1191                                 sorted = 1;
1192                         }
1193                 } while (j >= 0 && !sorted);
1194
1195                 dlm_handles[j + 1] = dlm_handles[4];
1196                 res_id[j + 1] = res_id[4];
1197                 lock_modes[j + 1] = lock_modes[4];
1198                 policies[j + 1] = policies[4];
1199         }
1200
1201         CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1202                res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1203                res_id[3]->name[0]);
1204
1205         /* XXX we could send ASTs on all these locks first before blocking? */
1206         for (i = 0; i < 4; i++) {
1207                 flags = 0;
1208
1209                 /*
1210                  * nevertheless zeroed res_ids should be at the end of list, and
1211                  * could use break here, I think, that it is more correctly for
1212                  * clear understanding of code to have continue here, as it
1213                  * clearly means, that zeroed res_id should be skipped and does
1214                  * not mean, that if we meet zeroed res_id we should stop
1215                  * locking loop.
1216                  */
1217                 if (res_id[i]->name[0] == 0)
1218                         continue;
1219
1220                 if (i != 0 &&
1221                     !memcmp(res_id[i], res_id[i-1], sizeof(*res_id[i])) &&
1222                     (policies[i]->l_inodebits.bits &
1223                      policies[i-1]->l_inodebits.bits) ) {
1224                         memcpy(dlm_handles[i], dlm_handles[i-1],
1225                                sizeof(*(dlm_handles[i])));
1226                         ldlm_lock_addref(dlm_handles[i], lock_modes[i]);
1227                 } else {
1228                         rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1229                                               *res_id[i], LDLM_IBITS,
1230                                               policies[i],
1231                                               lock_modes[i], &flags,
1232                                               mds_blocking_ast,
1233                                               ldlm_completion_ast, NULL, NULL,
1234                                               NULL, 0, NULL, dlm_handles[i]);
1235                         if (rc != ELDLM_OK)
1236                                 GOTO(out_err, rc = -EIO);
1237                         ldlm_lock_dump_handle(D_OTHER, dlm_handles[i]);
1238                 }
1239         }
1240
1241         RETURN(0);
1242 out_err:
1243         while (i-- > 0)
1244                 ldlm_lock_decref(dlm_handles[i], lock_modes[i]);
1245
1246         return rc;
1247 }
1248
1249 /* In the unlikely case that the child changed while we were waiting
1250  * on the lock, we need to drop the lock on the old child and either:
1251  * - if the child has a lower resource name, then we have to also
1252  *   drop the parent lock and regain the locks in the right order
1253  * - in the rename case, if the child has a lower resource name than one of
1254  *   the other parent/child resources (maxres) we also need to reget the locks
1255  * - if the child has a higher resource name (this is the common case)
1256  *   we can just get the lock on the new child (still in lock order)
1257  *
1258  * Returns 0 if the child did not change or if it changed but could be locked.
1259  * Returns 1 if the child changed and we need to re-lock (no locks held).
1260  * Returns -ve error with a valid dchild (no locks held). */
1261 static int mds_verify_child(struct obd_device *obd,
1262                             struct ldlm_res_id *parent_res_id,
1263                             struct lustre_handle *parent_lockh,
1264                             struct dentry *dparent, int parent_mode,
1265                             struct ldlm_res_id *child_res_id,
1266                             struct lustre_handle *child_lockh,
1267                             struct dentry **dchildp, int child_mode,
1268                             ldlm_policy_data_t *child_policy,
1269                             const char *name, int namelen,
1270                             struct ldlm_res_id *maxres,
1271                             unsigned long child_ino,
1272                             __u32 child_gen)
1273 {
1274         struct lustre_id sid;
1275         struct dentry *vchild, *dchild = *dchildp;
1276         int rc = 0, cleanup_phase = 2; /* parent, child locks */
1277         ENTRY;
1278
1279         vchild = ll_lookup_one_len(name, dparent, namelen - 1);
1280         if (IS_ERR(vchild))
1281                 GOTO(cleanup, rc = PTR_ERR(vchild));
1282
1283         if ((vchild->d_flags & DCACHE_CROSS_REF)) {
1284                 if (child_gen == vchild->d_generation &&
1285                     child_ino == vchild->d_inum) {
1286                         if (dchild)
1287                                 l_dput(dchild);
1288                         *dchildp = vchild;
1289                         RETURN(0);
1290                 }
1291                 goto changed;
1292         }
1293
1294         if (likely((vchild->d_inode == NULL && child_res_id->name[0] == 0) ||
1295                    (vchild->d_inode != NULL &&
1296                     child_gen == vchild->d_inode->i_generation &&
1297                     child_ino == vchild->d_inode->i_ino))) {
1298                 if (dchild)
1299                         l_dput(dchild);
1300                 *dchildp = vchild;
1301                 RETURN(0);
1302         }
1303
1304 changed:
1305         CDEBUG(D_DLMTRACE, "child inode changed: %p != %p (%lu != "LPU64")\n",
1306                vchild->d_inode, dchild ? dchild->d_inode : 0,
1307                vchild->d_inode ? vchild->d_inode->i_ino : 0,
1308                child_res_id->name[0]);
1309
1310         if (child_res_id->name[0] != 0)
1311                 ldlm_lock_decref(child_lockh, child_mode);
1312         if (dchild)
1313                 l_dput(dchild);
1314
1315         cleanup_phase = 1; /* parent lock only */
1316         *dchildp = dchild = vchild;
1317
1318         if (dchild->d_inode || (dchild->d_flags & DCACHE_CROSS_REF)) {
1319                 int flags = 0;
1320
1321                 if (dchild->d_inode) {
1322                         down(&dchild->d_inode->i_sem);
1323                         rc = mds_read_inode_sid(obd, dchild->d_inode, &sid);
1324                         up(&dchild->d_inode->i_sem);
1325                         if (rc) {
1326                                 CERROR("Can't read inode self id, inode %lu,"
1327                                        " rc %d\n",  dchild->d_inode->i_ino, rc);
1328                                 GOTO(cleanup, rc);
1329                         }
1330                         child_res_id->name[0] = id_fid(&sid);
1331                         child_res_id->name[1] = id_group(&sid);
1332                 } else {
1333                         child_res_id->name[0] = dchild->d_fid;
1334                         child_res_id->name[1] = dchild->d_mdsnum;
1335                 }
1336
1337                 if (res_gt(parent_res_id, child_res_id, NULL, NULL) ||
1338                     res_gt(maxres, child_res_id, NULL, NULL)) {
1339                         CDEBUG(D_DLMTRACE, "relock "LPU64"<("LPU64"|"LPU64")\n",
1340                                child_res_id->name[0], parent_res_id->name[0],
1341                                maxres->name[0]);
1342                         GOTO(cleanup, rc = 1);
1343                 }
1344
1345                 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1346                                       *child_res_id, LDLM_IBITS, child_policy,
1347                                       child_mode, &flags, mds_blocking_ast,
1348                                       ldlm_completion_ast, NULL, NULL, NULL, 0,
1349                                       NULL, child_lockh);
1350                 if (rc != ELDLM_OK)
1351                         GOTO(cleanup, rc = -EIO);
1352
1353         } else {
1354                 memset(child_res_id, 0, sizeof(*child_res_id));
1355         }
1356
1357 cleanup:
1358         if (rc) {
1359                 switch(cleanup_phase) {
1360                 case 2:
1361                         if (child_res_id->name[0] != 0)
1362                                 ldlm_lock_decref(child_lockh, child_mode);
1363                 case 1:
1364                         ldlm_lock_decref(parent_lockh, parent_mode);
1365                 }
1366         }
1367         RETURN(rc);
1368 }
1369
1370 int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds,
1371                                 struct lustre_id *id,
1372                                 struct lustre_handle *parent_lockh,
1373                                 struct dentry **dparentp, int parent_mode,
1374                                 __u64 parent_lockpart, int *update_mode,
1375                                 char *name, int namelen,
1376                                 struct lustre_handle *child_lockh,
1377                                 struct dentry **dchildp, int child_mode,
1378                                 __u64 child_lockpart)
1379 {
1380         ldlm_policy_data_t parent_policy = {.l_inodebits = { parent_lockpart }};
1381         ldlm_policy_data_t child_policy = {.l_inodebits = { child_lockpart }};
1382         struct ldlm_res_id parent_res_id = { .name = {0} };
1383         struct ldlm_res_id child_res_id = { .name = {0} };
1384         int rc = 0, cleanup_phase = 0;
1385         unsigned long child_ino;
1386         struct lustre_id sid;
1387         __u32 child_gen = 0;
1388         struct inode *inode;
1389         ENTRY;
1390
1391         /* Step 1: Lookup parent */
1392         *dparentp = mds_id2dentry(obd, id, NULL);
1393         if (IS_ERR(*dparentp)) {
1394                 rc = PTR_ERR(*dparentp);
1395                 *dparentp = NULL;
1396                 RETURN(rc);
1397         }
1398
1399         CDEBUG(D_INODE, "parent ino %lu, name %s\n",
1400                (*dparentp)->d_inode->i_ino, name);
1401
1402         parent_res_id.name[0] = id_fid(id);
1403         parent_res_id.name[1] = id_group(id);
1404
1405 #ifdef S_PDIROPS
1406         parent_lockh[1].cookie = 0;
1407         if (name && IS_PDIROPS((*dparentp)->d_inode)) {
1408                 struct ldlm_res_id res_id = { .name = {0} };
1409                 ldlm_policy_data_t policy;
1410                 int flags = 0;
1411
1412                 *update_mode = mds_lock_mode_for_dir(obd, *dparentp, parent_mode);
1413                 if (*update_mode) {
1414                         res_id.name[0] = id_fid(id);
1415                         res_id.name[1] = id_group(id);
1416                         policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1417
1418                         rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1419                                               res_id, LDLM_IBITS, &policy,
1420                                               *update_mode, &flags,
1421                                               mds_blocking_ast,
1422                                               ldlm_completion_ast,
1423                                               NULL, NULL, NULL, 0, NULL,
1424                                               parent_lockh + 1);
1425                         if (rc != ELDLM_OK)
1426                                 RETURN(-ENOLCK);
1427                 }
1428
1429                 parent_res_id.name[2] = full_name_hash(name, namelen - 1);
1430
1431                 CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n",
1432                        (unsigned long)id_fid(id), (unsigned long)id_group(id),
1433                        parent_res_id.name[2]);
1434         }
1435 #endif
1436
1437         cleanup_phase = 1; /* parent dentry */
1438
1439         /* Step 2: Lookup child (without DLM lock, to get resource name) */
1440         *dchildp = ll_lookup_one_len(name, *dparentp, namelen - 1);
1441         if (IS_ERR(*dchildp)) {
1442                 rc = PTR_ERR(*dchildp);
1443                 CDEBUG(D_INODE, "child lookup error %d\n", rc);
1444                 GOTO(cleanup, rc);
1445         }
1446
1447         if ((*dchildp)->d_flags & DCACHE_CROSS_REF) {
1448                 /*
1449                  * inode lives on another MDS: return * fid/mdsnum and LOOKUP
1450                  * lock. Drop possible UPDATE lock!
1451                  */
1452                 child_policy.l_inodebits.bits &= ~MDS_INODELOCK_UPDATE;
1453                 child_policy.l_inodebits.bits |= MDS_INODELOCK_LOOKUP;
1454
1455                 child_res_id.name[0] = (*dchildp)->d_fid;
1456                 child_res_id.name[1] = (*dchildp)->d_mdsnum;
1457                 child_gen = (*dchildp)->d_generation;
1458                 child_ino = (*dchildp)->d_inum;
1459                 goto retry_locks;
1460         }
1461
1462         inode = (*dchildp)->d_inode;
1463         if (inode != NULL)
1464                 inode = igrab(inode);
1465         if (inode == NULL)
1466                 goto retry_locks;
1467
1468         down(&inode->i_sem);
1469         rc = mds_read_inode_sid(obd, inode, &sid);
1470         up(&inode->i_sem);
1471         if (rc) {
1472                 CERROR("Can't read inode self id, inode %lu, "
1473                        "rc %d\n", inode->i_ino, rc);
1474                 iput(inode);
1475                 GOTO(cleanup, rc);
1476         }
1477
1478         child_res_id.name[0] = id_fid(&sid);
1479         child_res_id.name[1] = id_group(&sid);
1480         child_gen = inode->i_generation;
1481         child_ino = inode->i_ino;
1482         iput(inode);
1483
1484 retry_locks:
1485         cleanup_phase = 2; /* child dentry */
1486
1487         /* Step 3: Lock parent and child in resource order.  If child doesn't
1488          * exist, we still have to lock the parent and re-lookup. */
1489         rc = enqueue_ordered_locks(obd, &parent_res_id, parent_lockh, parent_mode,
1490                                    &parent_policy, &child_res_id, child_lockh,
1491                                    child_mode, &child_policy);
1492         if (rc)
1493                 GOTO(cleanup, rc);
1494
1495         if ((*dchildp)->d_inode || ((*dchildp)->d_flags & DCACHE_CROSS_REF))
1496                 cleanup_phase = 4; /* child lock */
1497         else
1498                 cleanup_phase = 3; /* parent lock */
1499
1500         /* Step 4: Re-lookup child to verify it hasn't changed since locking */
1501         rc = mds_verify_child(obd, &parent_res_id, parent_lockh, *dparentp,
1502                               parent_mode, &child_res_id, child_lockh,
1503                               dchildp, child_mode, &child_policy,
1504                               name, namelen, &parent_res_id,
1505                               child_ino, child_gen);
1506         if (rc > 0)
1507                 goto retry_locks;
1508         if (rc < 0) {
1509                 cleanup_phase = 3;
1510                 GOTO(cleanup, rc);
1511         }
1512
1513 cleanup:
1514         if (rc) {
1515                 switch (cleanup_phase) {
1516                 case 4:
1517                         ldlm_lock_decref(child_lockh, child_mode);
1518                 case 3:
1519                         ldlm_lock_decref(parent_lockh, parent_mode);
1520                 case 2:
1521                         l_dput(*dchildp);
1522                 case 1:
1523 #ifdef S_PDIROPS
1524                         if (parent_lockh[1].cookie)
1525                                 ldlm_lock_decref(parent_lockh + 1, *update_mode);
1526 #endif
1527                         l_dput(*dparentp);
1528                 }
1529         }
1530         RETURN(rc);
1531 }
1532
1533 void mds_reconstruct_generic(struct ptlrpc_request *req)
1534 {
1535         struct mds_export_data *med = &req->rq_export->exp_mds_data;
1536
1537         mds_req_from_mcd(req, med->med_mcd);
1538 }
1539 /* If we are unlinking an open file/dir (i.e. creating an orphan) then
1540  * we instead link the inode into the PENDING directory until it is
1541  * finally released.  We can't simply call mds_reint_rename() or some
1542  * part thereof, because we don't have the inode to check for link
1543  * count/open status until after it is locked.
1544  *
1545  * For lock ordering, caller must get child->i_sem first, then pending->i_sem
1546  * before starting journal transaction.
1547  *
1548  * returns 1 on success
1549  * returns 0 if we lost a race and didn't make a new link
1550  * returns negative on error
1551  */
1552 static int mds_orphan_add_link(struct mds_update_record *rec,
1553                                struct obd_device *obd, struct dentry *dentry)
1554 {
1555         struct mds_obd *mds = &obd->u.mds;
1556         struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1557         struct inode *inode = dentry->d_inode;
1558         struct dentry *pending_child;
1559         char idname[LL_ID_NAMELEN];
1560         int idlen = 0, rc, mode;
1561         ENTRY;
1562
1563         LASSERT(inode != NULL);
1564         LASSERT(!mds_inode_is_orphan(inode));
1565 #ifndef HAVE_I_ALLOC_SEM
1566         LASSERT(down_trylock(&inode->i_sem) != 0);
1567 #endif
1568         LASSERT(down_trylock(&pending_dir->i_sem) != 0);
1569
1570         idlen = ll_id2str(idname, inode->i_ino, inode->i_generation);
1571
1572         CDEBUG(D_INODE, "pending destroy of %dx open %d linked %s %s = %s\n",
1573                mds_orphan_open_count(inode), inode->i_nlink,
1574                S_ISDIR(inode->i_mode) ? "dir" :
1575                S_ISREG(inode->i_mode) ? "file" : "other",
1576                rec->ur_name, idname);
1577
1578         if (mds_orphan_open_count(inode) == 0 || inode->i_nlink != 0)
1579                 RETURN(0);
1580
1581         pending_child = lookup_one_len(idname, mds->mds_pending_dir, idlen);
1582         if (IS_ERR(pending_child))
1583                 RETURN(PTR_ERR(pending_child));
1584
1585         if (pending_child->d_inode != NULL) {
1586                 CERROR("re-destroying orphan file %s?\n", rec->ur_name);
1587                 LASSERT(pending_child->d_inode == inode);
1588                 GOTO(out_dput, rc = 0);
1589         }
1590
1591         /* link() is semanticaly-wrong for S_IFDIR, so we set S_IFREG
1592          * for linking and return real mode back then -bzzz */
1593         mode = inode->i_mode;
1594         inode->i_mode = S_IFREG;
1595         rc = vfs_link(dentry, pending_dir, pending_child);
1596         if (rc)
1597                 CERROR("error linking orphan %s to PENDING: rc = %d\n",
1598                        rec->ur_name, rc);
1599         else
1600                 mds_inode_set_orphan(inode);
1601
1602         /* return mode and correct i_nlink if inode is directory */
1603         inode->i_mode = mode;
1604         LASSERTF(inode->i_nlink == 1, "%s nlink == %d\n",
1605                  S_ISDIR(mode) ? "dir" : S_ISREG(mode) ? "file" : "other",
1606                  inode->i_nlink);
1607         if (S_ISDIR(mode)) {
1608                 inode->i_nlink++;
1609                 pending_dir->i_nlink++;
1610                 mark_inode_dirty(inode);
1611                 mark_inode_dirty(pending_dir);
1612         }
1613
1614         GOTO(out_dput, rc = 1);
1615 out_dput:
1616         l_dput(pending_child);
1617         RETURN(rc);
1618 }
1619
1620 int mds_create_local_dentry(struct mds_update_record *rec,
1621                             struct obd_device *obd)
1622 {
1623         struct mds_obd *mds = &obd->u.mds;
1624         struct inode *id_dir = mds->mds_id_dir->d_inode;
1625         int idlen = 0, rc, cleanup_phase = 0;
1626         struct dentry *new_child = NULL;
1627         char *idname = rec->ur_name;
1628         struct dentry *child = NULL;
1629         struct lustre_handle lockh[2] = {{0}, {0}};
1630         struct lustre_id sid;
1631         void *handle;
1632         ENTRY;
1633
1634         down(&id_dir->i_sem);
1635         idlen = ll_id2str(idname, id_ino(rec->ur_id1),
1636                           id_gen(rec->ur_id1));
1637
1638         CDEBUG(D_OTHER, "look for local dentry '%s' for "DLID4"\n",
1639                idname, OLID4(rec->ur_id1));
1640
1641         new_child = ll_lookup_one_len(idname, mds->mds_id_dir,
1642                                       idlen);
1643         up(&id_dir->i_sem);
1644         if (IS_ERR(new_child)) {
1645                 CERROR("can't lookup %s: %d\n", idname,
1646                        (int) PTR_ERR(new_child));
1647                 GOTO(cleanup, rc = PTR_ERR(new_child));
1648         }
1649         cleanup_phase = 1;
1650
1651         down(&id_dir->i_sem);
1652         rc = mds_read_inode_sid(obd, id_dir, &sid);
1653         up(&id_dir->i_sem);
1654         if (rc) {
1655                 CERROR("Can't read inode self id, inode %lu, "
1656                        "rc %d\n", id_dir->i_ino, rc);
1657                 GOTO(cleanup, rc);
1658         }
1659
1660         if (new_child->d_inode != NULL) {
1661                 /* nice. we've already have local dentry! */
1662                 CDEBUG(D_OTHER, "found dentry in FIDS/: %u/%u\n",
1663                        (unsigned)new_child->d_inode->i_ino,
1664                        (unsigned)new_child->d_inode->i_generation);
1665
1666                 id_ino(rec->ur_id1) = id_dir->i_ino;
1667                 id_gen(rec->ur_id1) = id_dir->i_generation;
1668                 rec->ur_namelen = idlen + 1;
1669
1670                 id_fid(rec->ur_id1) = id_fid(&sid);
1671                 id_group(rec->ur_id1) = id_group(&sid);
1672
1673                 GOTO(cleanup, rc = 0);
1674         }
1675
1676         /* new, local dentry will be added soon. we need no aliases here */
1677         d_drop(new_child);
1678
1679         if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
1680                 child = mds_id2dentry(obd, rec->ur_id1, NULL);
1681         } else {
1682                 child = mds_id2locked_dentry(obd, rec->ur_id1, NULL,
1683                                              LCK_EX, lockh, NULL, NULL, 0,
1684                                              MDS_INODELOCK_UPDATE);
1685         }
1686
1687         if (IS_ERR(child)) {
1688                 rc = PTR_ERR(child);
1689                 if (rc != -ENOENT || !(rec->ur_mode & MDS_MODE_REPLAY))
1690                         CERROR("can't get victim: %d\n", rc);
1691                 GOTO(cleanup, rc);
1692         }
1693         cleanup_phase = 2;
1694
1695         handle = fsfilt_start(obd, id_dir, FSFILT_OP_LINK, NULL);
1696         if (IS_ERR(handle))
1697                 GOTO(cleanup, rc = PTR_ERR(handle));
1698
1699         rc = fsfilt_add_dir_entry(obd, mds->mds_id_dir, idname,
1700                                   idlen, id_ino(rec->ur_id1),
1701                                   id_gen(rec->ur_id1), mds->mds_num,
1702                                   id_fid(rec->ur_id1));
1703         if (rc)
1704                 CERROR("error linking orphan %lu/%lu to FIDS: rc = %d\n",
1705                        (unsigned long)child->d_inode->i_ino,
1706                        (unsigned long)child->d_inode->i_generation, rc);
1707         else {
1708                 if (S_ISDIR(child->d_inode->i_mode)) {
1709                         id_dir->i_nlink++;
1710                         mark_inode_dirty(id_dir);
1711                 }
1712                 mark_inode_dirty(child->d_inode);
1713         }
1714         fsfilt_commit(obd, mds->mds_sb, id_dir, handle, 0);
1715
1716         id_ino(rec->ur_id1) = id_dir->i_ino;
1717         id_gen(rec->ur_id1) = id_dir->i_generation;
1718         rec->ur_namelen = idlen + 1;
1719
1720         id_fid(rec->ur_id1) = id_fid(&sid);
1721         id_group(rec->ur_id1) = id_group(&sid);
1722 cleanup:
1723         switch(cleanup_phase) {
1724                 case 2:
1725                         if (!(rec->ur_mode & MDS_MODE_DONT_LOCK))
1726                                 ldlm_lock_decref(lockh, LCK_EX);
1727                         dput(child);
1728                 case 1:
1729                         dput(new_child);
1730                 case 0:
1731                        break;
1732         }
1733         RETURN(rc);
1734 }
1735
1736 static int mds_copy_unlink_reply(struct ptlrpc_request *master,
1737                                  struct ptlrpc_request *slave)
1738 {
1739         void *cookie, *cookie2;
1740         struct mds_body *body2;
1741         struct mds_body *body;
1742         void *ea, *ea2;
1743         ENTRY;
1744
1745         body = lustre_msg_buf(slave->rq_repmsg, 0, sizeof(*body));
1746         LASSERT(body != NULL);
1747
1748         body2 = lustre_msg_buf(master->rq_repmsg, 0, sizeof (*body));
1749         LASSERT(body2 != NULL);
1750
1751         if (!(body->valid & (OBD_MD_FLID | OBD_MD_FLGENER)))
1752                 RETURN(0);
1753
1754         memcpy(body2, body, sizeof(*body));
1755         body2->valid &= ~OBD_MD_FLCOOKIE;
1756
1757         if (!(body->valid & OBD_MD_FLEASIZE) &&
1758             !(body->valid & OBD_MD_FLDIREA))
1759                 RETURN(0);
1760
1761         if (body->eadatasize == 0) {
1762                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1763                 RETURN(0);
1764         }
1765
1766         LASSERT(master->rq_repmsg->buflens[1] >= body->eadatasize);
1767
1768         ea = lustre_msg_buf(slave->rq_repmsg, 1, body->eadatasize);
1769         LASSERT(ea != NULL);
1770
1771         ea2 = lustre_msg_buf(master->rq_repmsg, 1, body->eadatasize);
1772         LASSERT(ea2 != NULL);
1773
1774         memcpy(ea2, ea, body->eadatasize);
1775
1776         if (body->valid & OBD_MD_FLCOOKIE) {
1777                 LASSERT(master->rq_repmsg->buflens[2] >=
1778                                 slave->rq_repmsg->buflens[2]);
1779                 cookie = lustre_msg_buf(slave->rq_repmsg, 2,
1780                                 slave->rq_repmsg->buflens[2]);
1781                 LASSERT(cookie != NULL);
1782
1783                 cookie2 = lustre_msg_buf(master->rq_repmsg, 2,
1784                                 master->rq_repmsg->buflens[2]);
1785                 LASSERT(cookie2 != NULL);
1786                 memcpy(cookie2, cookie, slave->rq_repmsg->buflens[2]);
1787                 body2->valid |= OBD_MD_FLCOOKIE;
1788         }
1789         RETURN(0);
1790 }
1791
1792 static int mds_reint_unlink_remote(struct mds_update_record *rec,
1793                                    int offset, struct ptlrpc_request *req,
1794                                    struct lustre_handle *parent_lockh,
1795                                    int update_mode, struct dentry *dparent,
1796                                    struct lustre_handle *child_lockh,
1797                                    struct dentry *dchild)
1798 {
1799         struct obd_device *obd = req->rq_export->exp_obd;
1800         struct mds_obd *mds = mds_req2mds(req);
1801         struct ptlrpc_request *request = NULL;
1802         int rc = 0, cleanup_phase = 0;
1803         struct mdc_op_data op_data;
1804         void *handle;
1805         ENTRY;
1806
1807         LASSERT(offset == 1 || offset == 3);
1808
1809         /* time to drop i_nlink on remote MDS */
1810         memset(&op_data, 0, sizeof(op_data));
1811         mds_pack_dentry2id(obd, &op_data.id1, dchild, 1);
1812         op_data.create_mode = rec->ur_mode;
1813
1814         DEBUG_REQ(D_INODE, req, "unlink %*s (remote inode "DLID4")",
1815                   rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data.id1));
1816
1817         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1818                 DEBUG_REQ(D_HA, req, "unlink %*s (remote inode "DLID4")",
1819                           rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data.id1));
1820         }
1821
1822         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1823                 op_data.create_mode |= MDS_MODE_REPLAY;
1824
1825         rc = md_unlink(mds->mds_lmv_exp, &op_data, &request);
1826         cleanup_phase = 2;
1827
1828         if (request) {
1829                 if (rc == 0)
1830                         mds_copy_unlink_reply(req, request);
1831                 ptlrpc_req_finished(request);
1832         }
1833
1834         if (rc == 0) {
1835                 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
1836                                       NULL);
1837                 if (IS_ERR(handle))
1838                         GOTO(cleanup, rc = PTR_ERR(handle));
1839                 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, dchild);
1840                 rc = mds_finish_transno(mds, dparent->d_inode, handle, req,
1841                                         rc, 0);
1842         }
1843         EXIT;
1844 cleanup:
1845         req->rq_status = rc;
1846
1847 #ifdef S_PDIROPS
1848         if (parent_lockh[1].cookie != 0)
1849                 ldlm_lock_decref(parent_lockh + 1, update_mode);
1850 #endif
1851         ldlm_lock_decref(child_lockh, LCK_EX);
1852         if (rc)
1853                 ldlm_lock_decref(parent_lockh, LCK_PW);
1854         else
1855                 ptlrpc_save_lock(req, parent_lockh, LCK_PW);
1856         l_dput(dchild);
1857         l_dput(dparent);
1858
1859         return 0;
1860 }
1861
1862 static int mds_reint_unlink(struct mds_update_record *rec, int offset,
1863                             struct ptlrpc_request *req,
1864                             struct lustre_handle *lh)
1865 {
1866         struct dentry *dparent = NULL, *dchild;
1867         struct mds_obd *mds = mds_req2mds(req);
1868         struct obd_device *obd = req->rq_export->exp_obd;
1869         struct mds_body *body = NULL;
1870         struct inode *child_inode = NULL;
1871         struct lustre_handle parent_lockh[2] = {{0}, {0}};
1872         struct lustre_handle child_lockh = {0};
1873         struct lustre_handle child_reuse_lockh = {0};
1874         struct lustre_handle *slave_lockh = NULL;
1875         char idname[LL_ID_NAMELEN];
1876         struct llog_create_locks *lcl = NULL;
1877         void *handle = NULL;
1878         int rc = 0, cleanup_phase = 0;
1879         int unlink_by_id = 0;
1880         int update_mode;
1881         ENTRY;
1882
1883         LASSERT(offset == 1 || offset == 3);
1884
1885         DEBUG_REQ(D_INODE, req, "parent ino "LPU64"/%u, child %s",
1886                   id_ino(rec->ur_id1), id_gen(rec->ur_id1),
1887                   rec->ur_name);
1888
1889         MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1890
1891         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1892                 DEBUG_REQ(D_HA, req, "unlink replay\n");
1893                 LASSERT(offset == 1); /* should not come from intent */
1894                 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
1895                        lustre_msg_buf(req->rq_reqmsg, offset + 2, 0),
1896                        req->rq_repmsg->buflens[2]);
1897         }
1898
1899         MDS_UPDATE_COUNTER(mds, MDS_UNLINK_COUNT);
1900
1901         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
1902                 GOTO(cleanup, rc = -ENOENT);
1903
1904         if (rec->ur_namelen == 1) {
1905                 /* this is request to drop i_nlink on local inode */
1906                 unlink_by_id = 1;
1907                 rec->ur_name = idname;
1908                 rc = mds_create_local_dentry(rec, obd);
1909                 if (rc == -ENOENT || (rec->ur_mode & MDS_MODE_REPLAY)) {
1910                         DEBUG_REQ(D_HA, req,
1911                                   "drop nlink on inode "DLID4" (replay)",
1912                                   OLID4(rec->ur_id1));
1913                         req->rq_status = 0;
1914                         RETURN(0);
1915                 }
1916         }
1917
1918         if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
1919                 /* master mds for directory asks slave removing inode is already
1920                  * locked */
1921                 dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL,
1922                                                LCK_PW, parent_lockh,
1923                                                &update_mode, rec->ur_name,
1924                                                rec->ur_namelen,
1925                                                MDS_INODELOCK_UPDATE);
1926                 if (IS_ERR(dparent))
1927                         GOTO(cleanup, rc = PTR_ERR(dparent));
1928                 dchild = ll_lookup_one_len(rec->ur_name, dparent,
1929                                            rec->ur_namelen - 1);
1930                 if (IS_ERR(dchild))
1931                         GOTO(cleanup, rc = PTR_ERR(dchild));
1932                 child_lockh.cookie = 0;
1933                 LASSERT(!(dchild->d_flags & DCACHE_CROSS_REF));
1934                 LASSERT(dchild->d_inode != NULL);
1935                 LASSERT(S_ISDIR(dchild->d_inode->i_mode));
1936         } else {
1937                 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1,
1938                                                  parent_lockh, &dparent,
1939                                                  LCK_PW, MDS_INODELOCK_UPDATE,
1940                                                  &update_mode, rec->ur_name,
1941                                                  rec->ur_namelen, &child_lockh,
1942                                                  &dchild, LCK_EX,
1943                                                  MDS_INODELOCK_LOOKUP |
1944                                                  MDS_INODELOCK_UPDATE);
1945         }
1946         if (rc)
1947                 GOTO(cleanup, rc);
1948
1949         if (dchild->d_flags & DCACHE_CROSS_REF) {
1950                 /* we should have parent lock only here */
1951                 LASSERT(unlink_by_id == 0);
1952                 LASSERT(dchild->d_mdsnum != mds->mds_num);
1953                 mds_reint_unlink_remote(rec, offset, req, parent_lockh,
1954                                         update_mode, dparent, &child_lockh, dchild);
1955                 RETURN(0);
1956         }
1957
1958         cleanup_phase = 1; /* dchild, dparent, locks */
1959
1960         dget(dchild);
1961         child_inode = dchild->d_inode;
1962         if (child_inode == NULL) {
1963                 CDEBUG(D_INODE, "child doesn't exist (dir %lu, name %s)\n",
1964                        dparent ? dparent->d_inode->i_ino : 0, rec->ur_name);
1965                 GOTO(cleanup, rc = -ENOENT);
1966         }
1967
1968         cleanup_phase = 2; /* dchild has a lock */
1969
1970         /* We have to do these checks ourselves, in case we are making an
1971          * orphan.  The client tells us whether rmdir() or unlink() was called,
1972          * so we need to return appropriate errors (bug 72).
1973          *
1974          * We don't have to check permissions, because vfs_rename (called from
1975          * mds_open_unlink_rename) also calls may_delete. */
1976         if ((rec->ur_mode & S_IFMT) == S_IFDIR) {
1977                 if (!S_ISDIR(child_inode->i_mode))
1978                         GOTO(cleanup, rc = -ENOTDIR);
1979         } else {
1980                 if (S_ISDIR(child_inode->i_mode))
1981                         GOTO(cleanup, rc = -EISDIR);
1982         }
1983
1984         /* handle splitted dir */
1985         rc = mds_lock_slave_objs(obd, dchild, &slave_lockh);
1986         if (rc)
1987                 GOTO(cleanup, rc);
1988
1989         /* Step 4: Get a lock on the ino to sync with creation WRT inode
1990          * reuse (see bug 2029). */
1991         rc = mds_lock_new_child(obd, child_inode, &child_reuse_lockh);
1992         if (rc != ELDLM_OK)
1993                 GOTO(cleanup, rc);
1994         cleanup_phase = 3; /* child inum lock */
1995
1996         OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dparent->d_inode->i_sb);
1997
1998         /* ldlm_reply in buf[0] if called via intent */
1999         if (offset == 3)
2000                 offset = 1;
2001         else
2002                 offset = 0;
2003
2004         body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
2005         LASSERT(body != NULL);
2006
2007         /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
2008         DOWN_READ_I_ALLOC_SEM(child_inode);
2009         cleanup_phase = 4; /* up(&child_inode->i_sem) when finished */
2010
2011         /* If this is potentially the last reference to this inode, get the
2012          * OBD EA data first so the client can destroy OST objects.  We
2013          * only do the object removal later if no open files/links remain. */
2014         if ((S_ISDIR(child_inode->i_mode) && child_inode->i_nlink == 2) ||
2015             child_inode->i_nlink == 1) {
2016                 if (mds_orphan_open_count(child_inode) > 0) {
2017                         /* need to lock pending_dir before transaction */
2018                         down(&mds->mds_pending_dir->d_inode->i_sem);
2019                         cleanup_phase = 5; /* up(&pending_dir->i_sem) */
2020                 } else if (S_ISREG(child_inode->i_mode)) {
2021                         mds_pack_inode2body(obd, body, child_inode, 0);
2022                         mds_pack_md(obd, req->rq_repmsg, offset + 1,
2023                                     body, child_inode, MDS_PACK_MD_LOCK);
2024                 }
2025         }
2026
2027         /* Step 4: Do the unlink: we already verified ur_mode above (bug 72) */
2028         switch (child_inode->i_mode & S_IFMT) {
2029         case S_IFDIR:
2030                 /* Drop any lingering child directories before we start our
2031                  * transaction, to avoid doing multiple inode dirty/delete
2032                  * in our compound transaction (bug 1321). */
2033                 shrink_dcache_parent(dchild);
2034                 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
2035                                       NULL);
2036                 if (IS_ERR(handle))
2037                         GOTO(cleanup, rc = PTR_ERR(handle));
2038                 rc = vfs_rmdir(dparent->d_inode, dchild);
2039                 break;
2040         case S_IFREG: {
2041 #warning "optimization is possible here: we could drop nlink w/o removing local dentry in FIDS/"
2042                 struct lov_mds_md *lmm = lustre_msg_buf(req->rq_repmsg,
2043                                                         offset + 1, 0);
2044                 handle = fsfilt_start_log(obd, dparent->d_inode,
2045                                           FSFILT_OP_UNLINK, NULL,
2046                                           le32_to_cpu(lmm->lmm_stripe_count));
2047                 if (IS_ERR(handle))
2048                         GOTO(cleanup, rc = PTR_ERR(handle));
2049                 rc = vfs_unlink(dparent->d_inode, dchild);
2050                 break;
2051         }
2052         case S_IFLNK:
2053         case S_IFCHR:
2054         case S_IFBLK:
2055         case S_IFIFO:
2056         case S_IFSOCK:
2057                 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK,
2058                                       NULL);
2059                 if (IS_ERR(handle))
2060                         GOTO(cleanup, rc = PTR_ERR(handle));
2061                 rc = vfs_unlink(dparent->d_inode, dchild);
2062                 break;
2063         default:
2064                 CERROR("bad file type %o unlinking %s\n", rec->ur_mode,
2065                        rec->ur_name);
2066                 LBUG();
2067                 GOTO(cleanup, rc = -EINVAL);
2068         }
2069
2070         if (rc == 0 && child_inode->i_nlink == 0) {
2071                 if (mds_orphan_open_count(child_inode) > 0)
2072                         rc = mds_orphan_add_link(rec, obd, dchild);
2073
2074                 if (rc == 1)
2075                         GOTO(cleanup, rc = 0);
2076
2077                 if (!S_ISREG(child_inode->i_mode))
2078                         GOTO(cleanup, rc);
2079
2080                 if (!(body->valid & OBD_MD_FLEASIZE)) {
2081                         body->valid |=(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
2082                                        OBD_MD_FLATIME | OBD_MD_FLMTIME);
2083                 } else if (mds_log_op_unlink(obd, child_inode,
2084                                 lustre_msg_buf(req->rq_repmsg, offset + 1, 0),
2085                                         req->rq_repmsg->buflens[offset + 1],
2086                                 lustre_msg_buf(req->rq_repmsg, offset + 2, 0),
2087                                         req->rq_repmsg->buflens[offset+2],
2088                                 &lcl) > 0){
2089                         body->valid |= OBD_MD_FLCOOKIE;
2090                 }
2091         }
2092
2093         GOTO(cleanup, rc);
2094
2095 cleanup:
2096         if (rc == 0) {
2097                 struct iattr iattr;
2098                 int err;
2099
2100                 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
2101                 LTIME_S(iattr.ia_mtime) = rec->ur_time;
2102                 LTIME_S(iattr.ia_ctime) = rec->ur_time;
2103
2104                 err = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
2105                 if (err)
2106                         CERROR("error on parent setattr: rc = %d\n", err);
2107         }
2108         rc = mds_finish_transno(mds, dparent ? dparent->d_inode : NULL,
2109                                 handle, req, rc, 0);
2110         if (!rc)
2111                 (void)obd_set_info(mds->mds_lov_exp, strlen("unlinked"),
2112                                    "unlinked", 0, NULL);
2113         switch(cleanup_phase) {
2114         case 5: /* pending_dir semaphore */
2115                 up(&mds->mds_pending_dir->d_inode->i_sem);
2116         case 4: /* child inode semaphore */
2117                 UP_READ_I_ALLOC_SEM(child_inode);
2118                  /* handle splitted dir */
2119                 if (rc == 0) {
2120                         /* master directory can be non-empty or something else ... */
2121                         mds_unlink_slave_objs(obd, dchild);
2122                 }
2123                 if (lcl != NULL)
2124                         ptlrpc_save_llog_lock(req, lcl);
2125         case 3: /* child ino-reuse lock */
2126                 if (rc && body != NULL) {
2127                         // Don't unlink the OST objects if the MDS unlink failed
2128                         body->valid = 0;
2129                 }
2130                 if (rc)
2131                         ldlm_lock_decref(&child_reuse_lockh, LCK_EX);
2132                 else
2133                         ptlrpc_save_lock(req, &child_reuse_lockh, LCK_EX);
2134         case 2: /* child lock */
2135                 mds_unlock_slave_objs(obd, dchild, slave_lockh);
2136                 if (child_lockh.cookie)
2137                         ldlm_lock_decref(&child_lockh, LCK_EX);
2138         case 1: /* child and parent dentry, parent lock */
2139 #ifdef S_PDIROPS
2140                 if (parent_lockh[1].cookie != 0)
2141                         ldlm_lock_decref(parent_lockh + 1, update_mode);
2142 #endif
2143                 if (rc)
2144                         ldlm_lock_decref(parent_lockh, LCK_PW);
2145                 else
2146                         ptlrpc_save_lock(req, parent_lockh, LCK_PW);
2147                 l_dput(dchild);
2148                 l_dput(dchild);
2149                 l_dput(dparent);
2150         case 0:
2151                 break;
2152         default:
2153                 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2154                 LBUG();
2155         }
2156         req->rq_status = rc;
2157         return 0;
2158 }
2159
2160 /*
2161  * to service requests from remote MDS to increment i_nlink
2162  */
2163 static int mds_reint_link_acquire(struct mds_update_record *rec,
2164                                   int offset, struct ptlrpc_request *req,
2165                                   struct lustre_handle *lh)
2166 {
2167         struct obd_device *obd = req->rq_export->exp_obd;
2168         struct ldlm_res_id src_res_id = { .name = {0} };
2169         struct lustre_handle *handle = NULL, src_lockh = {0};
2170         struct mds_obd *mds = mds_req2mds(req);
2171         int rc = 0, cleanup_phase = 0;
2172         struct dentry *de_src = NULL;
2173         ldlm_policy_data_t policy;
2174         int flags = 0;
2175         ENTRY;
2176
2177         DEBUG_REQ(D_INODE, req, "%s: request to acquire i_nlinks "DLID4"\n",
2178                   obd->obd_name, OLID4(rec->ur_id1));
2179
2180         /* Step 1: Lookup the source inode and target directory by ID */
2181         de_src = mds_id2dentry(obd, rec->ur_id1, NULL);
2182         if (IS_ERR(de_src))
2183                 GOTO(cleanup, rc = PTR_ERR(de_src));
2184         cleanup_phase = 1; /* source dentry */
2185
2186         src_res_id.name[0] = id_fid(rec->ur_id1);
2187         src_res_id.name[1] = id_group(rec->ur_id1);
2188         policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
2189
2190         rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
2191                               src_res_id, LDLM_IBITS, &policy,
2192                               LCK_EX, &flags, mds_blocking_ast,
2193                               ldlm_completion_ast, NULL, NULL,
2194                               NULL, 0, NULL, &src_lockh);
2195         if (rc != ELDLM_OK)
2196                 GOTO(cleanup, rc = -ENOLCK);
2197         cleanup_phase = 2; /* lock */
2198
2199         OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
2200
2201         handle = fsfilt_start(obd, de_src->d_inode, FSFILT_OP_LINK, NULL);
2202         if (IS_ERR(handle)) {
2203                 rc = PTR_ERR(handle);
2204                 GOTO(cleanup, rc);
2205         }
2206         de_src->d_inode->i_nlink++;
2207         mark_inode_dirty(de_src->d_inode);
2208
2209 cleanup:
2210         rc = mds_finish_transno(mds, de_src ? de_src->d_inode : NULL,
2211                                         handle, req, rc, 0);
2212         EXIT;
2213         switch (cleanup_phase) {
2214                 case 2:
2215                         if (rc)
2216                                 ldlm_lock_decref(&src_lockh, LCK_EX);
2217                         else
2218                                 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
2219                 case 1:
2220                         l_dput(de_src);
2221                 case 0:
2222                         break;
2223                 default:
2224                         CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2225                         LBUG();
2226         }
2227         req->rq_status = rc;
2228         return 0;
2229 }
2230
2231 /*
2232  * request to link to foreign inode:
2233  *  - acquire i_nlinks on this inode
2234  *  - add dentry
2235  */
2236 static int mds_reint_link_to_remote(struct mds_update_record *rec,
2237                                     int offset, struct ptlrpc_request *req,
2238                                     struct lustre_handle *lh)
2239 {
2240         struct lustre_handle *handle = NULL, tgt_dir_lockh[2] = {{0}, {0}};
2241         struct obd_device *obd = req->rq_export->exp_obd;
2242         struct dentry *de_tgt_dir = NULL;
2243         struct mds_obd *mds = mds_req2mds(req);
2244         int rc = 0, cleanup_phase = 0;
2245         struct mdc_op_data op_data;
2246         struct ptlrpc_request *request = NULL;
2247         int update_mode;
2248         ENTRY;
2249
2250         DEBUG_REQ(D_INODE, req, "%s: request to link "DLID4
2251                   ":%*s to foreign inode "DLID4"\n", obd->obd_name,
2252                   OLID4(rec->ur_id2), rec->ur_namelen - 1, rec->ur_name,
2253                   OLID4(rec->ur_id1));
2254
2255         de_tgt_dir = mds_id2locked_dentry(obd, rec->ur_id2, NULL, LCK_EX,
2256                                           tgt_dir_lockh, &update_mode,
2257                                           rec->ur_name, rec->ur_namelen - 1,
2258                                           MDS_INODELOCK_UPDATE);
2259         if (IS_ERR(de_tgt_dir))
2260                 GOTO(cleanup, rc = PTR_ERR(de_tgt_dir));
2261         cleanup_phase = 1;
2262
2263         op_data.id1 = *(rec->ur_id1);
2264         op_data.namelen = 0;
2265         op_data.name = NULL;
2266         rc = md_link(mds->mds_lmv_exp, &op_data, &request);
2267         if (rc)
2268                 GOTO(cleanup, rc);
2269
2270         cleanup_phase = 2;
2271         if (request)
2272                 ptlrpc_req_finished(request);
2273
2274         OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_tgt_dir->d_inode->i_sb);
2275
2276         handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
2277         if (IS_ERR(handle)) {
2278                 rc = PTR_ERR(handle);
2279                 GOTO(cleanup, rc);
2280         }
2281
2282         rc = fsfilt_add_dir_entry(obd, de_tgt_dir, rec->ur_name,
2283                                   rec->ur_namelen - 1, id_ino(rec->ur_id1),
2284                                   id_gen(rec->ur_id1), id_group(rec->ur_id1),
2285                                   id_fid(rec->ur_id1));
2286         cleanup_phase = 3;
2287
2288 cleanup:
2289         rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
2290                                 handle, req, rc, 0);
2291         EXIT;
2292
2293         switch (cleanup_phase) {
2294                 case 3:
2295                         if (rc) {
2296                                 /* FIXME: drop i_nlink on remote inode here */
2297                                 CERROR("MUST drop drop i_nlink here\n");
2298                         }
2299                 case 2:
2300                 case 1:
2301                         if (rc) {
2302                                 ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
2303 #ifdef S_PDIROPS
2304                                 ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
2305 #endif
2306                         } else {
2307                                 ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
2308 #ifdef S_PDIROPS
2309                                 ptlrpc_save_lock(req, tgt_dir_lockh+1, update_mode);
2310 #endif
2311                         }
2312                         l_dput(de_tgt_dir);
2313                         break;
2314                 default:
2315                         CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2316                         LBUG();
2317         }
2318         req->rq_status = rc;
2319         return 0;
2320 }
2321
2322 static int mds_reint_link(struct mds_update_record *rec, int offset,
2323                           struct ptlrpc_request *req,
2324                           struct lustre_handle *lh)
2325 {
2326         struct obd_device *obd = req->rq_export->exp_obd;
2327         struct dentry *de_src = NULL;
2328         struct dentry *de_tgt_dir = NULL;
2329         struct dentry *dchild = NULL;
2330         struct mds_obd *mds = mds_req2mds(req);
2331         struct lustre_handle *handle = NULL;
2332         struct lustre_handle tgt_dir_lockh[2] = {{0}, {0}}, src_lockh = {0};
2333         struct ldlm_res_id src_res_id = { .name = {0} };
2334         struct ldlm_res_id tgt_dir_res_id = { .name = {0} };
2335         ldlm_policy_data_t src_policy ={.l_inodebits = {MDS_INODELOCK_UPDATE}};
2336         ldlm_policy_data_t tgt_dir_policy =
2337                                        {.l_inodebits = {MDS_INODELOCK_UPDATE}};
2338         int rc = 0, cleanup_phase = 0;
2339 #ifdef S_PDIROPS
2340         int update_mode = 0;
2341 #endif
2342         ENTRY;
2343
2344         LASSERT(offset == 1);
2345
2346         DEBUG_REQ(D_INODE, req, "original "LPU64"/%u to "LPU64"/%u %s",
2347                   id_ino(rec->ur_id1), id_gen(rec->ur_id1),
2348                   id_ino(rec->ur_id2), id_gen(rec->ur_id2),
2349                   rec->ur_name);
2350
2351         MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
2352         MDS_UPDATE_COUNTER(mds, MDS_LINK_COUNT);
2353
2354 //      memset(tgt_dir_lockh, 0, 2*sizeof(tgt_dir_lockh[0]));
2355         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
2356                 GOTO(cleanup, rc = -ENOENT);
2357
2358         if (id_group(rec->ur_id1) != mds->mds_num) {
2359                 rc = mds_reint_link_to_remote(rec, offset, req, lh);
2360                 RETURN(rc);
2361         }
2362
2363         if (rec->ur_namelen == 1) {
2364                 rc = mds_reint_link_acquire(rec, offset, req, lh);
2365                 RETURN(rc);
2366         }
2367
2368         /* Step 1: Lookup the source inode and target directory by ID */
2369         de_src = mds_id2dentry(obd, rec->ur_id1, NULL);
2370         if (IS_ERR(de_src))
2371                 GOTO(cleanup, rc = PTR_ERR(de_src));
2372
2373         cleanup_phase = 1; /* source dentry */
2374
2375         de_tgt_dir = mds_id2dentry(obd, rec->ur_id2, NULL);
2376         if (IS_ERR(de_tgt_dir)) {
2377                 rc = PTR_ERR(de_tgt_dir);
2378                 de_tgt_dir = NULL;
2379                 GOTO(cleanup, rc);
2380         }
2381
2382         cleanup_phase = 2; /* target directory dentry */
2383
2384         CDEBUG(D_INODE, "linking %*s/%s to inode %lu\n",
2385                de_tgt_dir->d_name.len, de_tgt_dir->d_name.name,
2386                rec->ur_name, de_src->d_inode->i_ino);
2387
2388         /* Step 2: Take the two locks */
2389         src_res_id.name[0] = id_fid(rec->ur_id1);
2390         src_res_id.name[1] = id_group(rec->ur_id1);
2391         tgt_dir_res_id.name[0] = id_fid(rec->ur_id2);
2392         tgt_dir_res_id.name[1] = id_group(rec->ur_id2);
2393
2394 #ifdef S_PDIROPS
2395         if (IS_PDIROPS(de_tgt_dir->d_inode)) {
2396                 int flags = 0;
2397                 update_mode = mds_lock_mode_for_dir(obd, de_tgt_dir, LCK_EX);
2398                 if (update_mode) {
2399                         rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
2400                                               tgt_dir_res_id, LDLM_IBITS,
2401                                               &src_policy, update_mode, &flags,
2402                                               mds_blocking_ast,
2403                                               ldlm_completion_ast, NULL, NULL,
2404                                               NULL, 0, NULL, tgt_dir_lockh + 1);
2405                         if (rc != ELDLM_OK)
2406                                 GOTO(cleanup, rc = -ENOLCK);
2407                 }
2408
2409                 tgt_dir_res_id.name[2] = full_name_hash(rec->ur_name,
2410                                                         rec->ur_namelen - 1);
2411                 CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n",
2412                        (unsigned long)id_fid(rec->ur_id2),
2413                        (unsigned long)id_group(rec->ur_id2),
2414                        tgt_dir_res_id.name[2]);
2415         }
2416 #endif
2417         rc = enqueue_ordered_locks(obd, &src_res_id, &src_lockh, LCK_EX,
2418                                    &src_policy, &tgt_dir_res_id, tgt_dir_lockh,
2419                                    LCK_EX, &tgt_dir_policy);
2420         if (rc)
2421                 GOTO(cleanup, rc);
2422
2423         cleanup_phase = 3; /* locks */
2424
2425         /* Step 3: Lookup the child */
2426         dchild = ll_lookup_one_len(rec->ur_name, de_tgt_dir,
2427                                    rec->ur_namelen - 1);
2428         if (IS_ERR(dchild)) {
2429                 rc = PTR_ERR(dchild);
2430                 if (rc != -EPERM && rc != -EACCES)
2431                         CERROR("child lookup error %d\n", rc);
2432                 GOTO(cleanup, rc);
2433         }
2434
2435         cleanup_phase = 4; /* child dentry */
2436
2437         if (dchild->d_inode) {
2438                 CDEBUG(D_INODE, "child exists (dir %lu, name %s)\n",
2439                        de_tgt_dir->d_inode->i_ino, rec->ur_name);
2440                 rc = -EEXIST;
2441                 GOTO(cleanup, rc);
2442         }
2443
2444         /* Step 4: Do it. */
2445         OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
2446
2447         handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
2448         if (IS_ERR(handle)) {
2449                 rc = PTR_ERR(handle);
2450                 GOTO(cleanup, rc);
2451         }
2452
2453         rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
2454         if (rc && rc != -EPERM && rc != -EACCES)
2455                 CERROR("vfs_link error %d\n", rc);
2456 cleanup:
2457         rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
2458                                 handle, req, rc, 0);
2459         EXIT;
2460
2461         switch (cleanup_phase) {
2462         case 4: /* child dentry */
2463                 l_dput(dchild);
2464         case 3: /* locks */
2465                 if (rc) {
2466                         ldlm_lock_decref(&src_lockh, LCK_EX);
2467                         ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
2468                 } else {
2469                         ptlrpc_save_lock(req, &src_lockh, LCK_EX);
2470                         ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
2471                 }
2472         case 2: /* target dentry */
2473 #ifdef S_PDIROPS
2474                 if (tgt_dir_lockh[1].cookie && update_mode)
2475                         ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
2476 #endif
2477                 if (de_tgt_dir)
2478                         l_dput(de_tgt_dir);
2479         case 1: /* source dentry */
2480                 l_dput(de_src);
2481         case 0:
2482                 break;
2483         default:
2484                 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2485                 LBUG();
2486         }
2487         req->rq_status = rc;
2488         return 0;
2489 }
2490
2491 /* The idea here is that we need to get four locks in the end:
2492  * one on each parent directory, one on each child.  We need to take
2493  * these locks in some kind of order (to avoid deadlocks), and the order
2494  * I selected is "increasing resource number" order.  We need to look up
2495  * the children, however, before we know what the resource number(s) are.
2496  * Thus the following plan:
2497  *
2498  * 1,2. Look up the parents
2499  * 3,4. Look up the children
2500  * 5. Take locks on the parents and children, in order
2501  * 6. Verify that the children haven't changed since they were looked up
2502  *
2503  * If there was a race and the children changed since they were first looked
2504  * up, it is possible that mds_verify_child() will be able to just grab the
2505  * lock on the new child resource (if it has a higher resource than any other)
2506  * but we need to compare against not only its parent, but also against the
2507  * parent and child of the "other half" of the rename, hence maxres_{src,tgt}.
2508  *
2509  * We need the fancy igrab() on the child inodes because we aren't holding a
2510  * lock on the parent after the lookup is done, so dentry->d_inode may change
2511  * at any time, and igrab() itself doesn't like getting passed a NULL argument.
2512  */
2513 static int mds_get_parents_children_locked(struct obd_device *obd,
2514                                            struct mds_obd *mds,
2515                                            struct lustre_id *p1_id,
2516                                            struct dentry **de_srcdirp,
2517                                            struct lustre_id *p2_id,
2518                                            struct dentry **de_tgtdirp,
2519                                            int parent_mode,
2520                                            const char *old_name, int old_len,
2521                                            struct dentry **de_oldp,
2522                                            const char *new_name, int new_len,
2523                                            struct dentry **de_newp,
2524                                            struct lustre_handle *dlm_handles,
2525                                            int child_mode)
2526 {
2527         struct ldlm_res_id p1_res_id = { .name = {0} };
2528         struct ldlm_res_id p2_res_id = { .name = {0} };
2529         struct ldlm_res_id c1_res_id = { .name = {0} };
2530         struct ldlm_res_id c2_res_id = { .name = {0} };
2531         ldlm_policy_data_t p_policy = {.l_inodebits = {MDS_INODELOCK_UPDATE}};
2532         /* Only dentry should change, but the inode itself would be
2533            intact otherwise */
2534         ldlm_policy_data_t c1_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP}};
2535         /* If something is going to be replaced, both dentry and inode locks are
2536            needed */
2537         ldlm_policy_data_t c2_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP|
2538                                                         MDS_INODELOCK_UPDATE}};
2539         struct ldlm_res_id *maxres_src, *maxres_tgt;
2540         struct inode *inode;
2541         __u32 child1_gen = 0;
2542         __u32 child2_gen = 0;
2543         unsigned long child1_ino;
2544         unsigned long child2_ino;
2545         int rc = 0, cleanup_phase = 0;
2546         ENTRY;
2547
2548         /* Step 1: Lookup the source directory */
2549         *de_srcdirp = mds_id2dentry(obd, p1_id, NULL);
2550         if (IS_ERR(*de_srcdirp))
2551                 GOTO(cleanup, rc = PTR_ERR(*de_srcdirp));
2552
2553         cleanup_phase = 1; /* source directory dentry */
2554
2555         p1_res_id.name[0] = id_fid(p1_id);
2556         p1_res_id.name[1] = id_group(p1_id);
2557
2558         /* Step 2: Lookup the target directory */
2559         if (id_equal_stc(p1_id, p2_id)) {
2560                 *de_tgtdirp = dget(*de_srcdirp);
2561         } else {
2562                 *de_tgtdirp = mds_id2dentry(obd, p2_id, NULL);
2563                 if (IS_ERR(*de_tgtdirp)) {
2564                         rc = PTR_ERR(*de_tgtdirp);
2565                         *de_tgtdirp = NULL;
2566                         GOTO(cleanup, rc);
2567                 }
2568         }
2569
2570         cleanup_phase = 2; /* target directory dentry */
2571
2572         p2_res_id.name[0] = id_fid(p2_id);
2573         p2_res_id.name[1] = id_group(p2_id);
2574
2575 #ifdef S_PDIROPS
2576         dlm_handles[5].cookie = 0;
2577         dlm_handles[6].cookie = 0;
2578
2579         if (IS_PDIROPS((*de_srcdirp)->d_inode)) {
2580                 /*
2581                  * get a temp lock on just fid, group to flush client cache and
2582                  * to protect dirs from concurrent splitting.
2583                  */
2584                 rc = enqueue_ordered_locks(obd, &p1_res_id, &dlm_handles[5],
2585                                            LCK_PW, &p_policy, &p2_res_id,
2586                                            &dlm_handles[6], LCK_PW, &p_policy);
2587                 if (rc != ELDLM_OK)
2588                         GOTO(cleanup, rc);
2589
2590                 p1_res_id.name[2] = full_name_hash(old_name, old_len - 1);
2591                 p2_res_id.name[2] = full_name_hash(new_name, new_len - 1);
2592
2593                 CDEBUG(D_INFO, "take locks on "
2594                        LPX64":"LPX64":"LPX64", "LPX64":"LPX64":"LPX64"\n",
2595                        p1_res_id.name[0], p1_res_id.name[1], p1_res_id.name[2],
2596                        p2_res_id.name[0], p2_res_id.name[1], p2_res_id.name[2]);
2597         }
2598         cleanup_phase = 3;
2599 #endif
2600
2601         /* Step 3: Lookup the source child entry */
2602         *de_oldp = ll_lookup_one_len(old_name, *de_srcdirp,
2603                                      old_len - 1);
2604         if (IS_ERR(*de_oldp)) {
2605                 rc = PTR_ERR(*de_oldp);
2606                 CERROR("old child lookup error (%*s): %d\n",
2607                        old_len - 1, old_name, rc);
2608                 GOTO(cleanup, rc);
2609         }
2610
2611         cleanup_phase = 4; /* original name dentry */
2612
2613         inode = (*de_oldp)->d_inode;
2614         if (inode != NULL) {
2615                 struct lustre_id sid;
2616
2617                 inode = igrab(inode);
2618                 if (inode == NULL)
2619                         GOTO(cleanup, rc = -ENOENT);
2620
2621                 down(&inode->i_sem);
2622                 rc = mds_read_inode_sid(obd, inode, &sid);
2623                 up(&inode->i_sem);
2624                 if (rc) {
2625                         CERROR("Can't read inode self id, inode %lu, "
2626                                "rc %d\n", inode->i_ino, rc);
2627                         iput(inode);
2628                         GOTO(cleanup, rc);
2629                 }
2630
2631                 c1_res_id.name[0] = id_fid(&sid);
2632                 c1_res_id.name[1] = id_group(&sid);
2633                 child1_gen = inode->i_generation;
2634                 child1_ino = inode->i_ino;
2635                 iput(inode);
2636         } else if ((*de_oldp)->d_flags & DCACHE_CROSS_REF) {
2637                 c1_res_id.name[0] = (*de_oldp)->d_fid;
2638                 c1_res_id.name[1] = (*de_oldp)->d_mdsnum;
2639                 child1_gen = (*de_oldp)->d_generation;
2640                 child1_ino = (*de_oldp)->d_inum;
2641         } else {
2642                 GOTO(cleanup, rc = -ENOENT);
2643         }
2644
2645         /* Step 4: Lookup the target child entry */
2646         *de_newp = ll_lookup_one_len(new_name, *de_tgtdirp,
2647                                      new_len - 1);
2648         if (IS_ERR(*de_newp)) {
2649                 rc = PTR_ERR(*de_newp);
2650                 CERROR("new child lookup error (%*s): %d\n",
2651                        old_len - 1, old_name, rc);
2652                 GOTO(cleanup, rc);
2653         }
2654
2655         cleanup_phase = 5; /* target dentry */
2656
2657         inode = (*de_newp)->d_inode;
2658         if (inode != NULL) {
2659                 struct lustre_id sid;
2660
2661                 inode = igrab(inode);
2662                 if (inode == NULL)
2663                         goto retry_locks;
2664
2665                 down(&inode->i_sem);
2666                 rc = mds_read_inode_sid(obd, inode, &sid);
2667                 up(&inode->i_sem);
2668                 if (rc) {
2669                         CERROR("Can't read inode self id, inode %lu, "
2670                                "rc %d\n", inode->i_ino, rc);
2671                         GOTO(cleanup, rc);
2672                 }
2673
2674                 c2_res_id.name[0] = id_fid(&sid);
2675                 c2_res_id.name[1] = id_group(&sid);
2676                 child2_gen = inode->i_generation;
2677                 child2_ino = inode->i_ino;
2678                 iput(inode);
2679         } else if ((*de_newp)->d_flags & DCACHE_CROSS_REF) {
2680                 c2_res_id.name[0] = (*de_newp)->d_fid;
2681                 c2_res_id.name[1] = (*de_newp)->d_mdsnum;
2682                 child2_gen = (*de_newp)->d_generation;
2683                 child2_ino = (*de_newp)->d_inum;
2684         }
2685
2686 retry_locks:
2687         /* Step 5: Take locks on the parents and child(ren) */
2688         maxres_src = &p1_res_id;
2689         maxres_tgt = &p2_res_id;
2690         cleanup_phase = 5; /* target dentry */
2691
2692         if (c1_res_id.name[0] != 0 && res_gt(&c1_res_id, &p1_res_id, NULL, NULL))
2693                 maxres_src = &c1_res_id;
2694         if (c2_res_id.name[0] != 0 && res_gt(&c2_res_id, &p2_res_id, NULL, NULL))
2695                 maxres_tgt = &c2_res_id;
2696
2697         rc = enqueue_4ordered_locks(obd, &p1_res_id, &dlm_handles[0], parent_mode,
2698                                     &p_policy,
2699                                     &p2_res_id, &dlm_handles[1], parent_mode,
2700                                     &p_policy,
2701                                     &c1_res_id, &dlm_handles[2], child_mode,
2702                                     &c1_policy,
2703                                     &c2_res_id, &dlm_handles[3], child_mode,
2704                                     &c2_policy);
2705         if (rc)
2706                 GOTO(cleanup, rc);
2707
2708         cleanup_phase = 6; /* parent and child(ren) locks */
2709
2710         /* Step 6a: Re-lookup source child to verify it hasn't changed */
2711         rc = mds_verify_child(obd, &p1_res_id, &dlm_handles[0], *de_srcdirp,
2712                               parent_mode, &c1_res_id, &dlm_handles[2],
2713                               de_oldp, child_mode, &c1_policy, old_name,old_len,
2714                               maxres_tgt, child1_ino, child1_gen);
2715         if (rc) {
2716                 if (c2_res_id.name[0] != 0)
2717                         ldlm_lock_decref(&dlm_handles[3], child_mode);
2718                 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2719                 cleanup_phase = 5;
2720                 if (rc > 0)
2721                         goto retry_locks;
2722                 GOTO(cleanup, rc);
2723         }
2724
2725         if (!DENTRY_VALID(*de_oldp))
2726                 GOTO(cleanup, rc = -ENOENT);
2727
2728         /* Step 6b: Re-lookup target child to verify it hasn't changed */
2729         rc = mds_verify_child(obd, &p2_res_id, &dlm_handles[1], *de_tgtdirp,
2730                               parent_mode, &c2_res_id, &dlm_handles[3],
2731                               de_newp, child_mode, &c2_policy, new_name,
2732                               new_len, maxres_src, child2_ino, child2_gen);
2733         if (rc) {
2734                 ldlm_lock_decref(&dlm_handles[2], child_mode);
2735                 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2736                 cleanup_phase = 5;
2737                 if (rc > 0)
2738                         goto retry_locks;
2739                 GOTO(cleanup, rc);
2740         }
2741
2742         EXIT;
2743 cleanup:
2744         if (rc) {
2745                 switch (cleanup_phase) {
2746                 case 6: /* child lock(s) */
2747                         if (c2_res_id.name[0] != 0)
2748                                 ldlm_lock_decref(&dlm_handles[3], child_mode);
2749                         if (c1_res_id.name[0] != 0)
2750                                 ldlm_lock_decref(&dlm_handles[2], child_mode);
2751                         if (dlm_handles[1].cookie != 0)
2752                                 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2753                         if (dlm_handles[0].cookie != 0)
2754                                 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2755                 case 5: /* target dentry */
2756                         l_dput(*de_newp);
2757                 case 4: /* source dentry */
2758                         l_dput(*de_oldp);
2759                 case 3:
2760 #ifdef S_PDIROPS
2761                         if (dlm_handles[5].cookie != 0)
2762                                 ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
2763                         if (dlm_handles[6].cookie != 0)
2764                                 ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
2765 #endif
2766                 case 2: /* target directory dentry */
2767                         l_dput(*de_tgtdirp);
2768                 case 1: /* source directry dentry */
2769                         l_dput(*de_srcdirp);
2770                 }
2771         }
2772
2773         return rc;
2774 }
2775
2776 /*
2777  * checks if dentry can be removed. This function also handles cross-ref
2778  * dentries.
2779  */
2780 static int mds_check_for_rename(struct obd_device *obd,
2781                                 struct dentry *dentry)
2782 {
2783         struct mds_obd *mds = &obd->u.mds;
2784         struct lustre_handle *rlockh;
2785         struct ptlrpc_request *req;
2786         struct mdc_op_data op_data;
2787         struct lookup_intent it;
2788         int handle_size, rc = 0;
2789         ENTRY;
2790
2791         LASSERT(dentry != NULL);
2792
2793         if (dentry->d_inode) {
2794                 if (S_ISDIR(dentry->d_inode->i_mode) &&
2795                     !mds_is_dir_empty(obd, dentry))
2796                         rc = -ENOTEMPTY;
2797         } else {
2798                 LASSERT((dentry->d_flags & DCACHE_CROSS_REF));
2799                 handle_size = sizeof(struct lustre_handle);
2800
2801                 OBD_ALLOC(rlockh, handle_size);
2802                 if (rlockh == NULL)
2803                         RETURN(-ENOMEM);
2804
2805                 memset(rlockh, 0, handle_size);
2806                 memset(&op_data, 0, sizeof(op_data));
2807                 mds_pack_dentry2id(obd, &op_data.id1, dentry, 1);
2808
2809                 it.it_op = IT_UNLINK;
2810                 rc = md_enqueue(mds->mds_lmv_exp, LDLM_IBITS, &it, LCK_EX,
2811                                 &op_data, rlockh, NULL, 0, ldlm_completion_ast,
2812                                 mds_blocking_ast, NULL);
2813
2814                 if (rc)
2815                         RETURN(rc);
2816
2817                 if (rlockh->cookie != 0)
2818                         ldlm_lock_decref(rlockh, LCK_EX);
2819
2820                 if (it.d.lustre.it_data) {
2821                         req = (struct ptlrpc_request *)it.d.lustre.it_data;
2822                         ptlrpc_req_finished(req);
2823                 }
2824
2825                 if (it.d.lustre.it_status)
2826                         rc = it.d.lustre.it_status;
2827                 OBD_FREE(rlockh, handle_size);
2828         }
2829         RETURN(rc);
2830 }
2831
2832 static int mds_add_local_dentry(struct mds_update_record *rec, int offset,
2833                                 struct ptlrpc_request *req, struct lustre_id *id,
2834                                 struct dentry *de_dir, struct dentry *de,
2835                                 int del_cross_ref)
2836 {
2837         struct obd_device *obd = req->rq_export->exp_obd;
2838         struct mds_obd *mds = mds_req2mds(req);
2839         void *handle = NULL;
2840         int rc = 0;
2841         ENTRY;
2842
2843         if (de->d_inode) {
2844                 /*
2845                  * name exists and points to local inode try to unlink this name
2846                  * and create new one.
2847                  */
2848                 CDEBUG(D_OTHER, "%s: %s points to local inode %lu/%lu\n",
2849                        obd->obd_name, rec->ur_tgt, (unsigned long)de->d_inode->i_ino,
2850                        (unsigned long)de->d_inode->i_generation);
2851
2852                 /* checking if we can remove local dentry. */
2853                 rc = mds_check_for_rename(obd, de);
2854                 if (rc)
2855                         GOTO(cleanup, rc);
2856
2857                 handle = fsfilt_start(obd, de_dir->d_inode,
2858                                       FSFILT_OP_RENAME, NULL);
2859                 if (IS_ERR(handle))
2860                         GOTO(cleanup, rc = PTR_ERR(handle));
2861                 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de);
2862                 if (rc)
2863                         GOTO(cleanup, rc);
2864         } else if (de->d_flags & DCACHE_CROSS_REF) {
2865                 struct lustre_id de_id;
2866
2867                 /* name exists and points to remote inode */
2868                 mds_pack_dentry2id(obd, &de_id, de, 1);
2869
2870                 CDEBUG(D_OTHER, "%s: %s points to remote inode "DLID4"\n",
2871                        obd->obd_name, rec->ur_tgt, OLID4(&de_id));
2872
2873                 /* checking if we can remove local dentry. */
2874                 rc = mds_check_for_rename(obd, de);
2875                 if (rc)
2876                         GOTO(cleanup, rc);
2877
2878                 /*
2879                  * to be fully POSIX compatible, we should add one more check:
2880                  *
2881                  * if de_new is subdir of dir rec->ur_id1. If so - return
2882                  * -EINVAL.
2883                  *
2884                  * I do not know how to implement it right now, because
2885                  * inodes/dentries for new and old names lie on different MDS,
2886                  * so add this notice here just to make it visible for the rest
2887                  * of developers and do not forget about. And when this check
2888                  * will be added, del_cross_ref should gone, that is local
2889                  * dentry is able to be removed if all checks passed.
2890                  *
2891                  * Currently -EEXISTS is returned by fsfilt_add_dir_entry() what
2892                  * is not fully correct. --umka
2893                  */
2894
2895                 if (del_cross_ref) {
2896                         handle = fsfilt_start(obd, de_dir->d_inode,
2897                                               FSFILT_OP_RENAME, NULL);
2898                         if (IS_ERR(handle))
2899                                 GOTO(cleanup, rc = PTR_ERR(handle));
2900                         rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de);
2901                         if (rc)
2902                                 GOTO(cleanup, rc);
2903                 }
2904
2905         } else {
2906                 /* name doesn't exist. the simplest case. */
2907                 handle = fsfilt_start(obd, de_dir->d_inode,
2908                                       FSFILT_OP_LINK, NULL);
2909                 if (IS_ERR(handle))
2910                         GOTO(cleanup, rc = PTR_ERR(handle));
2911         }
2912
2913         rc = fsfilt_add_dir_entry(obd, de_dir, rec->ur_tgt,
2914                                   rec->ur_tgtlen - 1, id_ino(id),
2915                                   id_gen(id), id_group(id), id_fid(id));
2916         if (rc) {
2917                 CERROR("add_dir_entry() returned error %d\n", rc);
2918                 GOTO(cleanup, rc);
2919         }
2920
2921 cleanup:
2922         EXIT;
2923         rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL,
2924                                 handle, req, rc, 0);
2925
2926         RETURN(rc);
2927 }
2928
2929 static int mds_del_local_dentry(struct mds_update_record *rec, int offset,
2930                                 struct ptlrpc_request *req, struct dentry *de_dir,
2931                                 struct dentry *de)
2932 {
2933         struct obd_device *obd = req->rq_export->exp_obd;
2934         struct mds_obd *mds = mds_req2mds(req);
2935         void *handle = NULL;
2936         int rc = 0;
2937         ENTRY;
2938
2939         handle = fsfilt_start(obd, de_dir->d_inode, FSFILT_OP_UNLINK, NULL);
2940         if (IS_ERR(handle))
2941                 GOTO(cleanup, rc = PTR_ERR(handle));
2942         rc = fsfilt_del_dir_entry(obd, de);
2943         d_drop(de);
2944
2945 cleanup:
2946         EXIT;
2947         rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL,
2948                                 handle, req, rc, 0);
2949         RETURN(0);
2950 }
2951
2952 static int mds_reint_rename_create_name(struct mds_update_record *rec,
2953                                         int offset, struct ptlrpc_request *req)
2954 {
2955         struct lustre_handle parent_lockh[2] = {{0}, {0}};
2956         struct obd_device *obd = req->rq_export->exp_obd;
2957         struct mds_obd *mds = mds_req2mds(req);
2958         struct lustre_handle child_lockh = {0};
2959         struct dentry *de_tgtdir = NULL;
2960         struct dentry *de_new = NULL;
2961         int cleanup_phase = 0;
2962         int update_mode, rc = 0;
2963         ENTRY;
2964
2965         /*
2966          * another MDS executing rename operation has asked us to create target
2967          * name. such a creation should destroy existing target name.
2968          */
2969         CDEBUG(D_OTHER, "%s: request to create name %s for "DLID4"\n",
2970                obd->obd_name, rec->ur_tgt, OLID4(rec->ur_id1));
2971
2972         /* first, lookup the target */
2973         child_lockh.cookie = 0;
2974
2975         rc = mds_get_parent_child_locked(obd, mds, rec->ur_id2, parent_lockh,
2976                                          &de_tgtdir, LCK_PW, MDS_INODELOCK_UPDATE,
2977                                          &update_mode, rec->ur_tgt, rec->ur_tgtlen,
2978                                          &child_lockh, &de_new, LCK_EX,
2979                                          MDS_INODELOCK_LOOKUP);
2980         if (rc)
2981                 GOTO(cleanup, rc);
2982
2983         cleanup_phase = 1;
2984
2985         LASSERT(de_tgtdir);
2986         LASSERT(de_tgtdir->d_inode);
2987         LASSERT(de_new);
2988
2989         rc = mds_add_local_dentry(rec, offset, req, rec->ur_id1,
2990                                   de_tgtdir, de_new, 0);
2991
2992         GOTO(cleanup, rc);
2993 cleanup:
2994         EXIT;
2995
2996         if (cleanup_phase == 1) {
2997 #ifdef S_PDIROPS
2998                 if (parent_lockh[1].cookie != 0)
2999                         ldlm_lock_decref(&parent_lockh[1], update_mode);
3000 #endif
3001                 ldlm_lock_decref(&parent_lockh[0], LCK_PW);
3002                 if (child_lockh.cookie != 0)
3003                         ldlm_lock_decref(&child_lockh, LCK_EX);
3004                 l_dput(de_new);
3005                 l_dput(de_tgtdir);
3006         }
3007
3008         req->rq_status = rc;
3009         RETURN(0);
3010 }
3011
3012 static int mds_reint_rename_to_remote(struct mds_update_record *rec, int offset,
3013                                       struct ptlrpc_request *req)
3014 {
3015         struct obd_device *obd = req->rq_export->exp_obd;
3016         struct ptlrpc_request *req2 = NULL;
3017         struct dentry *de_srcdir = NULL;
3018         struct dentry *de_old = NULL;
3019         struct mds_obd *mds = mds_req2mds(req);
3020         struct lustre_handle parent_lockh[2] = {{0}, {0}};
3021         struct lustre_handle child_lockh = {0};
3022         struct mdc_op_data opdata;
3023         int update_mode, rc = 0;
3024         ENTRY;
3025
3026         CDEBUG(D_OTHER, "%s: move name %s onto another mds #%lu\n",
3027                obd->obd_name, rec->ur_name, (unsigned long)id_group(rec->ur_id2));
3028         memset(&opdata, 0, sizeof(opdata));
3029
3030         child_lockh.cookie = 0;
3031         rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1, parent_lockh,
3032                                          &de_srcdir, LCK_PW, MDS_INODELOCK_UPDATE,
3033                                          &update_mode, rec->ur_name,
3034                                          rec->ur_namelen, &child_lockh, &de_old,
3035                                          LCK_EX, MDS_INODELOCK_LOOKUP);
3036         LASSERT(rc == 0);
3037         LASSERT(de_srcdir);
3038         LASSERT(de_srcdir->d_inode);
3039         LASSERT(de_old);
3040
3041         /*
3042          * we already know the target should be created on another MDS so, we
3043          * have to request that MDS to do it.
3044          */
3045
3046         /* prepare source id */
3047         if (de_old->d_flags & DCACHE_CROSS_REF) {
3048                 LASSERT(de_old->d_inode == NULL);
3049                 CDEBUG(D_OTHER, "request to move remote name\n");
3050                 mds_pack_dentry2id(obd, &opdata.id1, de_old, 1);
3051         } else if (de_old->d_inode == NULL) {
3052                 /* oh, source doesn't exist */
3053                 GOTO(cleanup, rc = -ENOENT);
3054         } else {
3055                 struct lustre_id sid;
3056                 struct inode *inode = de_old->d_inode;
3057
3058                 LASSERT(inode != NULL);
3059                 CDEBUG(D_OTHER, "request to move local name\n");
3060                 id_ino(&opdata.id1) = inode->i_ino;
3061                 id_group(&opdata.id1) = mds->mds_num;
3062                 id_gen(&opdata.id1) = inode->i_generation;
3063
3064                 down(&inode->i_sem);
3065                 rc = mds_read_inode_sid(obd, inode, &sid);
3066                 up(&inode->i_sem);
3067                 if (rc) {
3068                         CERROR("Can't read inode self id, "
3069                                "inode %lu, rc = %d\n",
3070                                inode->i_ino, rc);
3071                         GOTO(cleanup, rc);
3072                 }
3073
3074                 id_fid(&opdata.id1) = id_fid(&sid);
3075         }
3076
3077         opdata.id2 = *rec->ur_id2;
3078         rc = md_rename(mds->mds_lmv_exp, &opdata, NULL, 0,
3079                        rec->ur_tgt, rec->ur_tgtlen - 1, &req2);
3080
3081         if (rc)
3082                 GOTO(cleanup, rc);
3083
3084         rc = mds_del_local_dentry(rec, offset, req, de_srcdir,
3085                                   de_old);
3086 cleanup:
3087         if (req2)
3088                 ptlrpc_req_finished(req2);
3089
3090 #ifdef S_PDIROPS
3091         if (parent_lockh[1].cookie != 0)
3092                 ldlm_lock_decref(&parent_lockh[1], update_mode);
3093 #endif
3094         ldlm_lock_decref(&parent_lockh[0], LCK_PW);
3095         if (child_lockh.cookie != 0)
3096                 ldlm_lock_decref(&child_lockh, LCK_EX);
3097
3098         l_dput(de_old);
3099         l_dput(de_srcdir);
3100
3101         req->rq_status = rc;
3102         RETURN(0);
3103 }
3104
3105 static int mds_reint_rename(struct mds_update_record *rec, int offset,
3106                             struct ptlrpc_request *req, struct lustre_handle *lockh)
3107 {
3108         struct obd_device *obd = req->rq_export->exp_obd;
3109         struct dentry *de_srcdir = NULL;
3110         struct dentry *de_tgtdir = NULL;
3111         struct dentry *de_old = NULL;
3112         struct dentry *de_new = NULL;
3113         struct inode *old_inode = NULL, *new_inode = NULL;
3114         struct mds_obd *mds = mds_req2mds(req);
3115         struct lustre_handle dlm_handles[7] = {{0},{0},{0},{0},{0},{0},{0}};
3116         struct mds_body *body = NULL;
3117         struct llog_create_locks *lcl = NULL;
3118         struct lov_mds_md *lmm = NULL;
3119         int rc = 0, cleanup_phase = 0;
3120         void *handle = NULL;
3121         ENTRY;
3122
3123         LASSERT(offset == 1);
3124
3125         DEBUG_REQ(D_INODE, req, "parent "DLID4" %s to "DLID4" %s",
3126                   OLID4(rec->ur_id1), rec->ur_name, OLID4(rec->ur_id2),
3127                   rec->ur_tgt);
3128
3129         MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
3130
3131         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
3132                 DEBUG_REQ(D_HA, req, "rename replay\n");
3133                 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
3134                        lustre_msg_buf(req->rq_reqmsg, offset + 3, 0),
3135                        req->rq_repmsg->buflens[2]);
3136         }
3137
3138         MDS_UPDATE_COUNTER(mds, MDS_RENAME_COUNT);
3139
3140         if (rec->ur_namelen == 1) {
3141                 rc = mds_reint_rename_create_name(rec, offset, req);
3142                 RETURN(rc);
3143         }
3144
3145         /* check if new name should be located on remote target. */
3146         if (id_group(rec->ur_id2) != mds->mds_num) {
3147                 rc = mds_reint_rename_to_remote(rec, offset, req);
3148                 RETURN(rc);
3149         }
3150
3151         rc = mds_get_parents_children_locked(obd, mds, rec->ur_id1, &de_srcdir,
3152                                              rec->ur_id2, &de_tgtdir, LCK_PW,
3153                                              rec->ur_name, rec->ur_namelen,
3154                                              &de_old, rec->ur_tgt,
3155                                              rec->ur_tgtlen, &de_new,
3156                                              dlm_handles, LCK_EX);
3157         if (rc)
3158                 GOTO(cleanup, rc);
3159
3160         cleanup_phase = 1; /* parent(s), children, locks */
3161         old_inode = de_old->d_inode;
3162         new_inode = de_new->d_inode;
3163
3164         /* sanity check for src inode */
3165         if (de_old->d_flags & DCACHE_CROSS_REF) {
3166                 LASSERT(de_old->d_inode == NULL);
3167
3168                 /*
3169                  * in the case of cross-ref dir, we can perform this check only
3170                  * if child and parent lie on the same mds. This is because
3171                  * otherwise they can have the same inode numbers.
3172                  */
3173                 if (de_old->d_mdsnum == mds->mds_num) {
3174                         if (de_old->d_inum == de_srcdir->d_inode->i_ino ||
3175                             de_old->d_inum == de_tgtdir->d_inode->i_ino)
3176                                 GOTO(cleanup, rc = -EINVAL);
3177                 }
3178         } else {
3179                 LASSERT(de_old->d_inode != NULL);
3180                 if (de_old->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
3181                     de_old->d_inode->i_ino == de_tgtdir->d_inode->i_ino)
3182                         GOTO(cleanup, rc = -EINVAL);
3183         }
3184
3185         /* sanity check for dest inode */
3186         if (de_new->d_flags & DCACHE_CROSS_REF) {
3187                 LASSERT(new_inode == NULL);
3188
3189                 /* the same check about target dentry. */
3190                 if (de_new->d_mdsnum == mds->mds_num) {
3191                         if (de_new->d_inum == de_srcdir->d_inode->i_ino ||
3192                             de_new->d_inum == de_tgtdir->d_inode->i_ino)
3193                                 GOTO(cleanup, rc = -EINVAL);
3194                 }
3195
3196                 /*
3197                  * regular files usualy do not have ->rename() implemented. But
3198                  * we handle only this case when @de_new is cross-ref entry,
3199                  * because in other cases it will be handled by vfs_rename().
3200                  */
3201                 if (de_old->d_inode && (!de_old->d_inode->i_op ||
3202                     !de_old->d_inode->i_op->rename))
3203                         GOTO(cleanup, rc = -EPERM);
3204         } else {
3205                 if (new_inode &&
3206                     (new_inode->i_ino == de_srcdir->d_inode->i_ino ||
3207                      new_inode->i_ino == de_tgtdir->d_inode->i_ino))
3208                         GOTO(cleanup, rc = -EINVAL);
3209
3210         }
3211
3212 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
3213         /*
3214          * check if we are moving old entry into its child. 2.6 does not check
3215          * for this in vfs_rename() anymore.
3216          */
3217         if (is_subdir(de_new, de_old))
3218                 GOTO(cleanup, rc = -EINVAL);
3219 #endif
3220
3221         /* check if inodes point to each other. */
3222         if (!(de_old->d_flags & DCACHE_CROSS_REF) &&
3223             !(de_new->d_flags & DCACHE_CROSS_REF) &&
3224             old_inode == new_inode)
3225                 GOTO(cleanup, rc = 0);
3226
3227         /*
3228          * if we are about to remove the target at first, pass the EA of that
3229          * inode to client to perform and cleanup on OST.
3230          */
3231         body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
3232         LASSERT(body != NULL);
3233
3234         /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
3235         if (new_inode)
3236                 DOWN_READ_I_ALLOC_SEM(new_inode);
3237
3238         cleanup_phase = 2; /* up(&new_inode->i_sem) when finished */
3239
3240         if (new_inode && ((S_ISDIR(new_inode->i_mode) &&
3241             new_inode->i_nlink == 2) ||
3242             new_inode->i_nlink == 1)) {
3243                 if (mds_orphan_open_count(new_inode) > 0) {
3244                         /* need to lock pending_dir before transaction */
3245                         down(&mds->mds_pending_dir->d_inode->i_sem);
3246                         cleanup_phase = 3; /* up(&pending_dir->i_sem) */
3247                 } else if (S_ISREG(new_inode->i_mode)) {
3248                         mds_pack_inode2body(obd, body, new_inode, 0);
3249                         mds_pack_md(obd, req->rq_repmsg, 1, body,
3250                                     new_inode, MDS_PACK_MD_LOCK);
3251                  }
3252         }
3253
3254         OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
3255                        de_srcdir->d_inode->i_sb);
3256
3257         if (de_old->d_flags & DCACHE_CROSS_REF) {
3258                 struct lustre_id old_id;
3259
3260                 mds_pack_dentry2id(obd, &old_id, de_old, 1);
3261
3262                 rc = mds_add_local_dentry(rec, offset, req, &old_id,
3263                                           de_tgtdir, de_new, 1);
3264                 if (rc)
3265                         GOTO(cleanup, rc);
3266
3267                 rc = mds_del_local_dentry(rec, offset, req, de_srcdir,
3268                                           de_old);
3269                 GOTO(cleanup, rc);
3270         }
3271
3272         lmm = lustre_msg_buf(req->rq_repmsg, 1, 0);
3273         handle = fsfilt_start_log(obd, de_tgtdir->d_inode, FSFILT_OP_RENAME,
3274                                   NULL, le32_to_cpu(lmm->lmm_stripe_count));
3275
3276         if (IS_ERR(handle))
3277                 GOTO(cleanup, rc = PTR_ERR(handle));
3278
3279         lock_kernel();
3280         de_old->d_fsdata = req;
3281         de_new->d_fsdata = req;
3282         rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
3283         unlock_kernel();
3284
3285         if (rc == 0 && new_inode != NULL && new_inode->i_nlink == 0) {
3286                 if (mds_orphan_open_count(new_inode) > 0)
3287                         rc = mds_orphan_add_link(rec, obd, de_new);
3288
3289                 if (rc == 1)
3290                         GOTO(cleanup, rc = 0);
3291
3292                 if (!S_ISREG(new_inode->i_mode))
3293                         GOTO(cleanup, rc);
3294
3295                 if (!(body->valid & OBD_MD_FLEASIZE)) {
3296                         body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
3297                                         OBD_MD_FLATIME | OBD_MD_FLMTIME);
3298                 } else if (mds_log_op_unlink(obd, new_inode,
3299                                              lustre_msg_buf(req->rq_repmsg,1,0),
3300                                              req->rq_repmsg->buflens[1],
3301                                              lustre_msg_buf(req->rq_repmsg,2,0),
3302                                              req->rq_repmsg->buflens[2],
3303                                              &lcl) > 0) {
3304                         body->valid |= OBD_MD_FLCOOKIE;
3305                 }
3306         }
3307
3308         GOTO(cleanup, rc);
3309 cleanup:
3310         EXIT;
3311         rc = mds_finish_transno(mds, (de_tgtdir ? de_tgtdir->d_inode : NULL),
3312                                 handle, req, rc, 0);
3313
3314         switch (cleanup_phase) {
3315         case 3:
3316                 up(&mds->mds_pending_dir->d_inode->i_sem);
3317         case 2:
3318                 if (new_inode)
3319                         UP_READ_I_ALLOC_SEM(new_inode);
3320         case 1:
3321 #ifdef S_PDIROPS
3322                 if (dlm_handles[5].cookie != 0)
3323                         ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
3324                 if (dlm_handles[6].cookie != 0)
3325                         ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
3326 #endif
3327                 if (lcl != NULL)
3328                         ptlrpc_save_llog_lock(req, lcl);
3329
3330                 if (rc) {
3331                         if (dlm_handles[3].cookie != 0)
3332                                 ldlm_lock_decref(&(dlm_handles[3]), LCK_EX);
3333                         ldlm_lock_decref(&(dlm_handles[2]), LCK_EX);
3334                         ldlm_lock_decref(&(dlm_handles[1]), LCK_PW);
3335                         ldlm_lock_decref(&(dlm_handles[0]), LCK_PW);
3336                 } else {
3337                         if (dlm_handles[3].cookie != 0)
3338                                 ptlrpc_save_lock(req,&(dlm_handles[3]), LCK_EX);
3339                         ptlrpc_save_lock(req, &(dlm_handles[2]), LCK_EX);
3340                         ptlrpc_save_lock(req, &(dlm_handles[1]), LCK_PW);
3341                         ptlrpc_save_lock(req, &(dlm_handles[0]), LCK_PW);
3342                 }
3343                 l_dput(de_new);
3344                 l_dput(de_old);
3345                 l_dput(de_tgtdir);
3346                 l_dput(de_srcdir);
3347         case 0:
3348                 break;
3349         default:
3350                 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
3351                 LBUG();
3352         }
3353         req->rq_status = rc;
3354         return 0;
3355 }
3356
3357 typedef int (*mds_reinter)(struct mds_update_record *, int offset,
3358                            struct ptlrpc_request *, struct lustre_handle *);
3359
3360 static mds_reinter reinters[REINT_MAX + 1] = {
3361         [REINT_SETATTR] mds_reint_setattr,
3362         [REINT_CREATE] mds_reint_create,
3363         [REINT_LINK] mds_reint_link,
3364         [REINT_UNLINK] mds_reint_unlink,
3365         [REINT_RENAME] mds_reint_rename,
3366         [REINT_OPEN] mds_open
3367 };
3368
3369 int mds_reint_rec(struct mds_update_record *rec, int offset,
3370                   struct ptlrpc_request *req, struct lustre_handle *lockh)
3371 {
3372         struct obd_device *obd = req->rq_export->exp_obd;
3373         struct lvfs_run_ctxt saved;
3374         int rc;
3375
3376         /* checked by unpacker */
3377         LASSERT(rec->ur_opcode <= REINT_MAX &&
3378                 reinters[rec->ur_opcode] != NULL);
3379
3380         push_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
3381         rc = reinters[rec->ur_opcode] (rec, offset, req, lockh);
3382         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
3383
3384         return rc;
3385 }