1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * linux/mds/mds_reint.c
5 * Lustre Metadata Server (mds) reintegration routines
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>
12 * This file is part of Lustre, http://www.lustre.org.
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.
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.
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.
29 # define EXPORT_SYMTAB
31 #define DEBUG_SUBSYSTEM S_MDS
34 #include <linux/obd_support.h>
35 #include <linux/obd_class.h>
36 #include <linux/obd.h>
37 #include <linux/lustre_lib.h>
38 #include <linux/lustre_idl.h>
39 #include <linux/lustre_mds.h>
40 #include <linux/lustre_dlm.h>
41 #include <linux/lustre_log.h>
42 #include <linux/lustre_fsfilt.h>
44 #include "mds_internal.h"
46 void mds_commit_cb(struct obd_device *obd, __u64 transno, void *data,
49 obd_transno_commit_cb(obd, transno, error);
52 struct mds_logcancel_data {
53 struct lov_mds_md *mlcd_lmm;
57 struct llog_cookie mlcd_cookies[0];
61 static void mds_cancel_cookies_cb(struct obd_device *obd, __u64 transno,
62 void *cb_data, int error)
64 struct mds_logcancel_data *mlcd = cb_data;
65 struct lov_stripe_md *lsm = NULL;
66 struct llog_ctxt *ctxt;
69 obd_transno_commit_cb(obd, transno, error);
71 CDEBUG(D_HA, "cancelling %d cookies\n",
72 (int)(mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies)));
74 rc = obd_unpackmd(obd->u.mds.mds_osc_exp, &lsm, mlcd->mlcd_lmm,
75 mlcd->mlcd_eadatalen);
77 CERROR("bad LSM cancelling %d log cookies: rc %d\n",
78 (int)(mlcd->mlcd_cookielen/sizeof(*mlcd->mlcd_cookies)),
81 ///* XXX 0 normally, SENDNOW for debug */);
82 ctxt = llog_get_context(&obd->obd_llogs,
83 mlcd->mlcd_cookies[0].lgc_subsys + 1);
84 rc = llog_cancel(ctxt, mlcd->mlcd_cookielen /
85 sizeof(*mlcd->mlcd_cookies),
86 mlcd->mlcd_cookies, OBD_LLOG_FL_SENDNOW, lsm);
88 CERROR("error cancelling %d log cookies: rc %d\n",
89 (int)(mlcd->mlcd_cookielen /
90 sizeof(*mlcd->mlcd_cookies)), rc);
93 OBD_FREE(mlcd, mlcd->mlcd_size);
96 /* Assumes caller has already pushed us into the kernel context. */
97 int mds_finish_transno(struct mds_obd *mds, struct inode *inode, void *handle,
98 struct ptlrpc_request *req, int rc, __u32 op_data)
100 struct mds_export_data *med = &req->rq_export->exp_mds_data;
101 struct mds_client_data *mcd = med->med_mcd;
102 struct obd_device *obd = req->rq_export->exp_obd;
109 /* if the export has already been failed, we have no last_rcvd slot */
110 if (req->rq_export->exp_failed) {
111 CERROR("committing transaction for disconnected client\n");
120 if (handle == NULL) {
121 /* if we're starting our own xaction, use our own inode */
122 inode = mds->mds_rcvd_filp->f_dentry->d_inode;
123 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
124 if (IS_ERR(handle)) {
125 CERROR("fsfilt_start: %ld\n", PTR_ERR(handle));
126 RETURN(PTR_ERR(handle));
132 transno = req->rq_reqmsg->transno;
134 LASSERT(transno == 0);
135 } else if (transno == 0) {
136 spin_lock(&mds->mds_transno_lock);
137 transno = ++mds->mds_last_transno;
138 spin_unlock(&mds->mds_transno_lock);
140 spin_lock(&mds->mds_transno_lock);
141 if (transno > mds->mds_last_transno)
142 mds->mds_last_transno = transno;
143 spin_unlock(&mds->mds_transno_lock);
145 req->rq_repmsg->transno = req->rq_transno = transno;
146 mcd->mcd_last_transno = cpu_to_le64(transno);
147 mcd->mcd_last_xid = cpu_to_le64(req->rq_xid);
148 mcd->mcd_last_result = cpu_to_le32(rc);
149 mcd->mcd_last_data = cpu_to_le32(op_data);
152 fsfilt_add_journal_cb(req->rq_export->exp_obd, mds->mds_sb,
153 transno, handle, mds_commit_cb, NULL);
155 err = fsfilt_write_record(obd, mds->mds_rcvd_filp, mcd, sizeof(*mcd),
164 DEBUG_REQ(log_pri, req,
165 "wrote trans #"LPU64" client %s at idx %u: err = %d",
166 transno, mcd->mcd_uuid, med->med_idx, err);
168 err = mds_lov_write_objids(obd);
174 CDEBUG(log_pri, "wrote objids: err = %d\n", err);
177 err = fsfilt_commit(obd, inode, handle, 0);
179 CERROR("error committing transaction: %d\n", err);
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
192 int mds_fix_attr(struct inode *inode, struct mds_update_record *rec)
194 time_t now = LTIME_S(CURRENT_TIME);
195 struct iattr *attr = &rec->ur_iattr;
196 unsigned int ia_valid = attr->ia_valid;
200 /* only fix up attrs if the client VFS didn't already */
201 if (!(ia_valid & ATTR_RAW))
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;
211 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
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)
221 if (ia_valid & ATTR_SIZE) {
222 if ((error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
226 if (ia_valid & ATTR_UID) {
229 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
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;
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>
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.
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;
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>
259 * Removed the fsuid check (see the comment above) --
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;
267 } else if (ia_valid & ATTR_MODE) {
268 int mode = attr->ia_mode;
270 if (attr->ia_mode == (mode_t) -1)
271 attr->ia_mode = inode->i_mode;
273 (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
278 void mds_steal_ack_locks(struct ptlrpc_request *req)
280 struct obd_export *exp = req->rq_export;
281 struct list_head *tmp;
282 struct ptlrpc_reply_state *oldrep;
283 struct ptlrpc_service *svc;
285 char str[PTL_NALFMT_SIZE];
288 /* CAVEAT EMPTOR: spinlock order */
289 spin_lock_irqsave (&exp->exp_lock, flags);
290 list_for_each (tmp, &exp->exp_outstanding_replies) {
291 oldrep = list_entry(tmp, struct ptlrpc_reply_state,rs_exp_list);
293 if (oldrep->rs_xid != req->rq_xid)
296 if (oldrep->rs_msg.opc != req->rq_reqmsg->opc)
297 CERROR ("Resent req xid "LPX64" has mismatched opc: "
298 "new %d old %d\n", req->rq_xid,
299 req->rq_reqmsg->opc, oldrep->rs_msg.opc);
301 svc = oldrep->rs_srv_ni->sni_service;
302 spin_lock (&svc->srv_lock);
304 list_del_init (&oldrep->rs_exp_list);
306 CWARN("Stealing %d locks from rs %p x"LPD64".t"LPD64
308 oldrep->rs_nlocks, oldrep,
309 oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_msg.opc,
310 ptlrpc_peernid2str(&exp->exp_connection->c_peer, str));
312 for (i = 0; i < oldrep->rs_nlocks; i++)
313 ptlrpc_save_lock(req,
314 &oldrep->rs_locks[i],
315 oldrep->rs_modes[i]);
316 oldrep->rs_nlocks = 0;
318 DEBUG_REQ(D_HA, req, "stole locks for");
319 ptlrpc_schedule_difficult_reply (oldrep);
321 spin_unlock (&svc->srv_lock);
322 spin_unlock_irqrestore (&exp->exp_lock, flags);
325 spin_unlock_irqrestore (&exp->exp_lock, flags);
328 void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd)
330 DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
331 mcd->mcd_last_transno, mcd->mcd_last_result);
332 req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_transno;
333 req->rq_repmsg->status = req->rq_status = mcd->mcd_last_result;
335 mds_steal_ack_locks(req);
338 static void reconstruct_reint_setattr(struct mds_update_record *rec,
339 int offset, struct ptlrpc_request *req)
341 struct mds_export_data *med = &req->rq_export->exp_mds_data;
342 struct mds_obd *obd = &req->rq_export->exp_obd->u.mds;
344 struct mds_body *body;
346 mds_req_from_mcd(req, med->med_mcd);
348 de = mds_fid2dentry(obd, rec->ur_fid1, NULL);
350 LASSERT(PTR_ERR(de) == req->rq_status);
354 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
355 mds_pack_inode2fid(req2obd(req), &body->fid1, de->d_inode);
356 mds_pack_inode2body(req2obd(req), body, de->d_inode);
358 /* Don't return OST-specific attributes if we didn't just set them */
359 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
360 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
361 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
362 body->valid |= OBD_MD_FLMTIME;
363 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
364 body->valid |= OBD_MD_FLATIME;
369 /* In the raw-setattr case, we lock the child inode.
370 * In the write-back case or if being called from open, the client holds a lock
373 * We use the ATTR_FROM_OPEN flag to tell these cases apart. */
374 static int mds_reint_setattr(struct mds_update_record *rec, int offset,
375 struct ptlrpc_request *req,
376 struct lustre_handle *lh)
378 struct mds_obd *mds = mds_req2mds(req);
379 struct obd_device *obd = req->rq_export->exp_obd;
380 struct mds_body *body;
382 struct inode *inode = NULL;
383 struct lustre_handle lockh[2] = {{0}, {0}};
385 struct mds_logcancel_data *mlcd = NULL;
386 int rc = 0, cleanup_phase = 0, err, locked = 0;
389 LASSERT(offset == 0);
391 DEBUG_REQ(D_INODE, req, "setattr "LPU64"/%u %x", rec->ur_fid1->id,
392 rec->ur_fid1->generation, rec->ur_iattr.ia_valid);
394 MDS_CHECK_RESENT(req, reconstruct_reint_setattr(rec, offset, req));
396 if (rec->ur_iattr.ia_valid & ATTR_FROM_OPEN) {
397 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
399 GOTO(cleanup, rc = PTR_ERR(de));
401 __u64 lockpart = MDS_INODELOCK_UPDATE;
402 if (rec->ur_iattr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID) )
403 lockpart |= MDS_INODELOCK_LOOKUP;
404 de = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, LCK_PW,
405 lockh, NULL, 0, lockpart);
407 GOTO(cleanup, rc = PTR_ERR(de));
415 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
416 rec->ur_eadata != NULL)
419 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb);
421 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
423 GOTO(cleanup, rc = PTR_ERR(handle));
425 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
426 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n",
427 LTIME_S(rec->ur_iattr.ia_mtime),
428 LTIME_S(rec->ur_iattr.ia_ctime));
429 rc = mds_fix_attr(inode, rec);
433 if (rec->ur_iattr.ia_valid & ATTR_ATTR_FLAG) /* ioctl */
434 rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_SETFLAGS,
435 (long)&rec->ur_iattr.ia_attr_flags);
437 rc = fsfilt_setattr(obd, de, handle, &rec->ur_iattr, 0);
439 if (rc == 0 && (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
440 rec->ur_eadata != NULL) {
441 struct lov_stripe_md *lsm = NULL;
443 rc = ll_permission(inode, MAY_WRITE, NULL);
447 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
448 mds->mds_osc_exp, 0, &lsm, rec->ur_eadata);
452 obd_free_memmd(mds->mds_osc_exp, &lsm);
454 rc = fsfilt_set_md(obd, inode, handle, rec->ur_eadata,
460 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
461 mds_pack_inode2fid(obd, &body->fid1, inode);
462 mds_pack_inode2body(obd, body, inode);
464 /* Don't return OST-specific attributes if we didn't just set them */
465 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
466 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
467 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
468 body->valid |= OBD_MD_FLMTIME;
469 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
470 body->valid |= OBD_MD_FLATIME;
472 if (rc == 0 && rec->ur_cookielen && !IS_ERR(mds->mds_osc_obd)) {
473 OBD_ALLOC(mlcd, sizeof(*mlcd) + rec->ur_cookielen +
476 mlcd->mlcd_size = sizeof(*mlcd) + rec->ur_cookielen +
478 mlcd->mlcd_eadatalen = rec->ur_eadatalen;
479 mlcd->mlcd_cookielen = rec->ur_cookielen;
480 mlcd->mlcd_lmm = (void *)&mlcd->mlcd_cookies +
481 mlcd->mlcd_cookielen;
482 memcpy(&mlcd->mlcd_cookies, rec->ur_logcookies,
483 mlcd->mlcd_cookielen);
484 memcpy(mlcd->mlcd_lmm, rec->ur_eadata,
485 mlcd->mlcd_eadatalen);
487 CERROR("unable to allocate log cancel data\n");
493 fsfilt_add_journal_cb(req->rq_export->exp_obd, mds->mds_sb, 0,
494 handle, mds_cancel_cookies_cb, mlcd);
495 err = mds_finish_transno(mds, inode, handle, req, rc, 0);
496 switch (cleanup_phase) {
498 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
499 rec->ur_eadata != NULL)
504 if (lockh[1].cookie != 0)
505 ldlm_lock_decref(lockh + 1, LCK_CW);
508 ldlm_lock_decref(lockh, LCK_PW);
510 ptlrpc_save_lock (req, lockh, LCK_PW);
525 static void reconstruct_reint_create(struct mds_update_record *rec, int offset,
526 struct ptlrpc_request *req)
528 struct mds_export_data *med = &req->rq_export->exp_mds_data;
529 struct mds_obd *obd = &req->rq_export->exp_obd->u.mds;
530 struct dentry *parent, *child;
531 struct mds_body *body;
533 mds_req_from_mcd(req, med->med_mcd);
538 parent = mds_fid2dentry(obd, rec->ur_fid1, NULL);
539 LASSERT(!IS_ERR(parent));
540 child = ll_lookup_one_len(rec->ur_name, parent, rec->ur_namelen - 1);
541 LASSERT(!IS_ERR(child));
542 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
543 mds_pack_inode2fid(req2obd(req), &body->fid1, child->d_inode);
544 mds_pack_inode2body(req2obd(req), body, child->d_inode);
549 static int mds_reint_create(struct mds_update_record *rec, int offset,
550 struct ptlrpc_request *req,
551 struct lustre_handle *lh)
553 struct dentry *dparent = NULL;
554 struct mds_obd *mds = mds_req2mds(req);
555 struct obd_device *obd = req->rq_export->exp_obd;
556 struct dentry *dchild = NULL;
557 struct inode *dir = NULL;
559 struct lustre_handle lockh[2] = {{0}, {0}};
560 int rc = 0, err, type = rec->ur_mode & S_IFMT, cleanup_phase = 0;
562 struct dentry_params dp;
563 struct mea *mea = NULL;
567 LASSERT(offset == 0);
568 LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name, "mds"));
570 DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u name %s mode %o",
571 rec->ur_fid1->id, rec->ur_fid1->generation,
572 rec->ur_name, rec->ur_mode);
574 MDS_CHECK_RESENT(req, reconstruct_reint_create(rec, offset, req));
576 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
577 GOTO(cleanup, rc = -ESTALE);
579 dparent = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, LCK_PW, lockh,
580 rec->ur_name, rec->ur_namelen - 1,
581 MDS_INODELOCK_UPDATE);
582 if (IS_ERR(dparent)) {
583 rc = PTR_ERR(dparent);
584 CERROR("parent lookup error %d\n", rc);
587 cleanup_phase = 1; /* locked parent dentry */
588 dir = dparent->d_inode;
591 ldlm_lock_dump_handle(D_OTHER, lockh);
593 /* try to retrieve MEA data for this dir */
594 rc = mds_get_lmv_attr(obd, dparent->d_inode, &mea, &mea_size);
599 /* dir is already splitted, check is requested filename
600 * should live at this MDS or at another one */
602 i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
603 if (mea->mea_master != i) {
604 CERROR("inapropriate MDS(%d) for %s. should be %d\n",
605 mea->mea_master, rec->ur_name, i);
606 GOTO(cleanup, rc = -ERESTART);
610 dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1);
611 if (IS_ERR(dchild)) {
612 rc = PTR_ERR(dchild);
613 CERROR("child lookup error %d\n", rc);
617 cleanup_phase = 2; /* child dentry */
619 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb);
621 if (type == S_IFREG || type == S_IFDIR) {
622 if ((rc = mds_try_to_split_dir(obd, dparent, &mea, 0))) {
624 /* dir got splitted */
625 GOTO(cleanup, rc = -ERESTART);
627 /* error happened during spitting */
633 if (dir->i_mode & S_ISGID) {
634 if (S_ISDIR(rec->ur_mode))
635 rec->ur_mode |= S_ISGID;
638 dchild->d_fsdata = (void *)&dp;
639 dp.p_inum = (unsigned long)rec->ur_fid2->id;
644 handle = fsfilt_start(obd, dir, FSFILT_OP_CREATE, NULL);
646 GOTO(cleanup, rc = PTR_ERR(handle));
647 rc = ll_vfs_create(dir, dchild, rec->ur_mode, NULL);
655 /* as Peter asked, mkdir() should distribute new directories
656 * over the whole cluster in order to distribute namespace
657 * processing load. first, we calculate which MDS to use to
658 * put new directory's inode in */
659 i = mds_choose_mdsnum(obd, rec->ur_name, rec->ur_namelen - 1,
661 if (i == mds->mds_num) {
662 /* inode will be created locally */
664 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
666 GOTO(cleanup, rc = PTR_ERR(handle));
668 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
671 nstripes = *(u16 *)rec->ur_eadata;
673 if (rc == 0 && nstripes) {
674 /* FIXME: error handling here */
675 mds_try_to_split_dir(obd, dchild,
678 } else if (!DENTRY_VALID(dchild)) {
679 /* inode will be created on another MDS */
680 struct obdo *oa = NULL;
681 struct mds_body *body;
683 /* first, create that inode */
687 obdo_from_inode(oa, dir, OBD_MD_FLTYPE | OBD_MD_FLATIME |
688 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
689 OBD_MD_FLUID | OBD_MD_FLGID);
690 oa->o_mode = dir->i_mode;
691 CDEBUG(D_OTHER, "%s: create dir on MDS %u\n",
693 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
694 CWARN("%s: replay dir creation %*s -> %u/%u\n",
695 obd->obd_name, rec->ur_namelen - 1,
696 rec->ur_name, (unsigned) rec->ur_fid2->id,
697 (unsigned) rec->ur_fid2->generation);
698 oa->o_id = rec->ur_fid2->id;
699 oa->o_generation = rec->ur_fid2->generation;
700 oa->o_flags |= OBD_FL_RECREATE_OBJS;
703 rc = obd_create(mds->mds_lmv_exp, oa, NULL, NULL);
709 /* now, add new dir entry for it */
710 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
711 if (IS_ERR(handle)) {
713 GOTO(cleanup, rc = PTR_ERR(handle));
715 rc = fsfilt_add_dir_entry(obd, dparent, rec->ur_name,
717 oa->o_id, oa->o_generation,
722 body = lustre_msg_buf(req->rq_repmsg,
723 offset, sizeof (*body));
724 body->valid |= OBD_MD_FLID | OBD_MD_MDS;
725 body->fid1.id = oa->o_id;
727 body->fid1.generation = oa->o_generation;
730 /* requested name exists in the directory */
737 handle = fsfilt_start(obd, dir, FSFILT_OP_SYMLINK, NULL);
739 GOTO(cleanup, rc = PTR_ERR(handle));
740 if (rec->ur_tgt == NULL) /* no target supplied */
741 rc = -EINVAL; /* -EPROTO? */
743 rc = vfs_symlink(dir, dchild, rec->ur_tgt);
751 int rdev = rec->ur_rdev;
752 handle = fsfilt_start(obd, dir, FSFILT_OP_MKNOD, NULL);
754 GOTO(cleanup, (handle = NULL, rc = PTR_ERR(handle)));
755 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
760 CERROR("bad file type %o creating %s\n", type, rec->ur_name);
761 dchild->d_fsdata = NULL;
762 GOTO(cleanup, rc = -EINVAL);
765 /* In case we stored the desired inum in here, we want to clean up. */
766 if (dchild->d_fsdata == (void *)(unsigned long)rec->ur_fid2->id)
767 dchild->d_fsdata = NULL;
770 CDEBUG(D_INODE, "error during create: %d\n", rc);
772 } else if (dchild->d_inode) {
774 struct inode *inode = dchild->d_inode;
775 struct mds_body *body;
778 LTIME_S(iattr.ia_atime) = rec->ur_time;
779 LTIME_S(iattr.ia_ctime) = rec->ur_time;
780 LTIME_S(iattr.ia_mtime) = rec->ur_time;
781 iattr.ia_uid = rec->_ur_fsuid;
782 if (dir->i_mode & S_ISGID)
783 iattr.ia_gid = dir->i_gid;
785 iattr.ia_gid = rec->_ur_fsgid;
786 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
787 ATTR_MTIME | ATTR_CTIME;
789 if (rec->ur_fid2->id) {
790 LASSERT(rec->ur_fid2->id == inode->i_ino);
791 inode->i_generation = rec->ur_fid2->generation;
792 /* Dirtied and committed by the upcoming setattr. */
793 CDEBUG(D_INODE, "recreated ino %lu with gen %u\n",
794 inode->i_ino, inode->i_generation);
796 struct lustre_handle child_ino_lockh;
798 CDEBUG(D_INODE, "created ino %lu with gen %x\n",
799 inode->i_ino, inode->i_generation);
801 /* The inode we were allocated may have just been freed
802 * by an unlink operation. We take this lock to
803 * synchronize against the matching reply-ack-lock taken
804 * in unlink, to avoid replay problems if this reply
805 * makes it out to the client but the unlink's does not.
806 * See bug 2029 for more detail.*/
807 rc = mds_lock_new_child(obd, inode, &child_ino_lockh);
808 if (rc != ELDLM_OK) {
809 CERROR("error locking for unlink/create sync: "
812 ldlm_lock_decref(&child_ino_lockh, LCK_EX);
816 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
818 CERROR("error on child setattr: rc = %d\n", rc);
820 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
821 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
823 CERROR("error on parent setattr: rc = %d\n", rc);
825 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
826 mds_pack_inode2fid(obd, &body->fid1, inode);
827 mds_pack_inode2body(obd, body, inode);
832 err = mds_finish_transno(mds, dir, handle, req, rc, 0);
835 /* Destroy the file we just created. This should not need
836 * extra journal credits, as we have already modified all of
837 * the blocks needed in order to create the file in the first
842 err = vfs_rmdir(dir, dchild);
844 CERROR("rmdir in error path: %d\n", err);
847 err = vfs_unlink(dir, dchild);
849 CERROR("unlink in error path: %d\n", err);
855 switch (cleanup_phase) {
856 case 2: /* child dentry */
858 case 1: /* locked parent dentry */
860 if (lockh[1].cookie != 0)
861 ldlm_lock_decref(lockh + 1, LCK_CW);
864 ldlm_lock_decref(lockh, LCK_PW);
866 ptlrpc_save_lock (req, lockh, LCK_PW);
872 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
876 OBD_FREE(mea, mea_size);
881 static int res_gt(struct ldlm_res_id *res1, struct ldlm_res_id *res2,
882 ldlm_policy_data_t *p1, ldlm_policy_data_t *p2)
886 for (i = 0; i < RES_NAME_SIZE; i++) {
887 /* return 1 here, because enqueue_ordered will skip resources
888 * of all zeroes if they're sorted to the end of the list. */
889 if (res1->name[i] == 0 && res2->name[i] != 0)
891 if (res2->name[i] == 0 && res1->name[i] != 0)
894 if (res1->name[i] > res2->name[i])
896 if (res1->name[i] < res2->name[i])
903 if (memcmp(p1, p2, sizeof(*p1)) < 0)
909 /* This function doesn't use ldlm_match_or_enqueue because we're always called
910 * with EX or PW locks, and the MDS is no longer allowed to match write locks,
911 * because they take the place of local semaphores.
913 * One or two locks are taken in numerical order. A res_id->name[0] of 0 means
914 * no lock is taken for that res_id. Must be at least one non-zero res_id. */
915 int enqueue_ordered_locks(struct obd_device *obd, struct ldlm_res_id *p1_res_id,
916 struct lustre_handle *p1_lockh, int p1_lock_mode,
917 ldlm_policy_data_t *p1_policy,
918 struct ldlm_res_id *p2_res_id,
919 struct lustre_handle *p2_lockh, int p2_lock_mode,
920 ldlm_policy_data_t *p2_policy)
922 struct ldlm_res_id *res_id[2] = { p1_res_id, p2_res_id };
923 struct lustre_handle *handles[2] = { p1_lockh, p2_lockh };
924 int lock_modes[2] = { p1_lock_mode, p2_lock_mode };
925 ldlm_policy_data_t *policies[2] = { p1_policy, p2_policy };
929 LASSERT(p1_res_id != NULL && p2_res_id != NULL);
931 CDEBUG(D_INFO, "locks before: "LPU64"/"LPU64"\n", res_id[0]->name[0],
934 if (res_gt(p1_res_id, p2_res_id, p1_policy, p2_policy)) {
935 handles[1] = p1_lockh;
936 handles[0] = p2_lockh;
937 res_id[1] = p1_res_id;
938 res_id[0] = p2_res_id;
939 lock_modes[1] = p1_lock_mode;
940 lock_modes[0] = p2_lock_mode;
941 policies[1] = p1_policy;
942 policies[0] = p2_policy;
945 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"\n",
946 res_id[0]->name[0], res_id[1]->name[0]);
948 flags = LDLM_FL_LOCAL_ONLY;
949 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, *res_id[0],
950 LDLM_IBITS, policies[0], lock_modes[0], &flags,
951 mds_blocking_ast, ldlm_completion_ast, NULL, NULL,
952 NULL, 0, NULL, handles[0]);
955 ldlm_lock_dump_handle(D_OTHER, handles[0]);
957 if (!memcmp(res_id[0], res_id[1], sizeof(*res_id[0])) &&
958 (policies[0]->l_inodebits.bits & policies[1]->l_inodebits.bits)) {
959 memcpy(handles[1], handles[0], sizeof(*(handles[1])));
960 ldlm_lock_addref(handles[1], lock_modes[1]);
961 } else if (res_id[1]->name[0] != 0) {
962 flags = LDLM_FL_LOCAL_ONLY;
963 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
964 *res_id[1], LDLM_IBITS, policies[1],
965 lock_modes[1], &flags, mds_blocking_ast,
966 ldlm_completion_ast, NULL, NULL, NULL, 0,
968 if (rc != ELDLM_OK) {
969 ldlm_lock_decref(handles[0], lock_modes[0]);
972 ldlm_lock_dump_handle(D_OTHER, handles[1]);
978 int enqueue_4ordered_locks(struct obd_device *obd,struct ldlm_res_id *p1_res_id,
979 struct lustre_handle *p1_lockh, int p1_lock_mode,
980 ldlm_policy_data_t *p1_policy,
981 struct ldlm_res_id *p2_res_id,
982 struct lustre_handle *p2_lockh, int p2_lock_mode,
983 ldlm_policy_data_t *p2_policy,
984 struct ldlm_res_id *c1_res_id,
985 struct lustre_handle *c1_lockh, int c1_lock_mode,
986 ldlm_policy_data_t *c1_policy,
987 struct ldlm_res_id *c2_res_id,
988 struct lustre_handle *c2_lockh, int c2_lock_mode,
989 ldlm_policy_data_t *c2_policy)
991 struct ldlm_res_id *res_id[5] = { p1_res_id, p2_res_id,
992 c1_res_id, c2_res_id };
993 struct lustre_handle *dlm_handles[5] = { p1_lockh, p2_lockh,
994 c1_lockh, c2_lockh };
995 int lock_modes[5] = { p1_lock_mode, p2_lock_mode,
996 c1_lock_mode, c2_lock_mode };
997 ldlm_policy_data_t *policies[5] = { p1_policy, p2_policy,
998 c1_policy, c2_policy};
999 int rc, i, j, sorted, flags;
1003 "locks before: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1004 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1005 res_id[3]->name[0]);
1007 /* simple insertion sort - we have at most 4 elements */
1008 for (i = 1; i < 4; i++) {
1010 dlm_handles[4] = dlm_handles[i];
1011 res_id[4] = res_id[i];
1012 lock_modes[4] = lock_modes[i];
1013 policies[4] = policies[i];
1017 if (res_gt(res_id[j], res_id[4], policies[j],
1019 dlm_handles[j + 1] = dlm_handles[j];
1020 res_id[j + 1] = res_id[j];
1021 lock_modes[j + 1] = lock_modes[j];
1022 policies[j + 1] = policies[j];
1027 } while (j >= 0 && !sorted);
1029 dlm_handles[j + 1] = dlm_handles[4];
1030 res_id[j + 1] = res_id[4];
1031 lock_modes[j + 1] = lock_modes[4];
1032 policies[j + 1] = policies[4];
1036 "lock order: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1037 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1038 res_id[3]->name[0]);
1040 /* XXX we could send ASTs on all these locks first before blocking? */
1041 for (i = 0; i < 4; i++) {
1043 if (res_id[i]->name[0] == 0)
1046 !memcmp(res_id[i], res_id[i-1], sizeof(*res_id[i])) &&
1047 (policies[i]->l_inodebits.bits &
1048 policies[i-1]->l_inodebits.bits) ) {
1049 memcpy(dlm_handles[i], dlm_handles[i-1],
1050 sizeof(*(dlm_handles[i])));
1051 ldlm_lock_addref(dlm_handles[i], lock_modes[i]);
1053 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1054 *res_id[i], LDLM_IBITS,
1056 lock_modes[i], &flags,
1058 ldlm_completion_ast, NULL, NULL,
1059 NULL, 0, NULL, dlm_handles[i]);
1061 GOTO(out_err, rc = -EIO);
1062 ldlm_lock_dump_handle(D_OTHER, dlm_handles[i]);
1069 ldlm_lock_decref(dlm_handles[i], lock_modes[i]);
1074 /* In the unlikely case that the child changed while we were waiting
1075 * on the lock, we need to drop the lock on the old child and either:
1076 * - if the child has a lower resource name, then we have to also
1077 * drop the parent lock and regain the locks in the right order
1078 * - in the rename case, if the child has a lower resource name than one of
1079 * the other parent/child resources (maxres) we also need to reget the locks
1080 * - if the child has a higher resource name (this is the common case)
1081 * we can just get the lock on the new child (still in lock order)
1083 * Returns 0 if the child did not change or if it changed but could be locked.
1084 * Returns 1 if the child changed and we need to re-lock (no locks held).
1085 * Returns -ve error with a valid dchild (no locks held). */
1086 static int mds_verify_child(struct obd_device *obd,
1087 struct ldlm_res_id *parent_res_id,
1088 struct lustre_handle *parent_lockh,
1089 struct dentry *dparent, int parent_mode,
1090 struct ldlm_res_id *child_res_id,
1091 struct lustre_handle *child_lockh,
1092 struct dentry **dchildp, int child_mode,
1093 ldlm_policy_data_t *child_policy,
1094 const char *name, int namelen,
1095 struct ldlm_res_id *maxres)
1097 struct dentry *vchild, *dchild = *dchildp;
1098 int rc = 0, cleanup_phase = 2; /* parent, child locks */
1101 vchild = ll_lookup_one_len(name, dparent, namelen - 1);
1103 GOTO(cleanup, rc = PTR_ERR(vchild));
1105 if ((vchild->d_flags & DCACHE_CROSS_REF)) {
1106 if (child_res_id->name[0] == vchild->d_inum &&
1107 child_res_id->name[1] == vchild->d_generation) {
1116 if (likely((vchild->d_inode == NULL && child_res_id->name[0] == 0) ||
1117 (vchild->d_inode != NULL &&
1118 child_res_id->name[0] == vchild->d_inode->i_ino &&
1119 child_res_id->name[1] == vchild->d_inode->i_generation))) {
1128 CDEBUG(D_DLMTRACE, "child inode changed: %p != %p (%lu != "LPU64")\n",
1129 vchild->d_inode, dchild ? dchild->d_inode : 0,
1130 vchild->d_inode ? vchild->d_inode->i_ino : 0,
1131 child_res_id->name[0]);
1132 if (child_res_id->name[0] != 0)
1133 ldlm_lock_decref(child_lockh, child_mode);
1137 cleanup_phase = 1; /* parent lock only */
1138 *dchildp = dchild = vchild;
1140 if (dchild->d_inode || (dchild->d_flags & DCACHE_CROSS_REF)) {
1142 if (dchild->d_inode) {
1143 child_res_id->name[0] = dchild->d_inode->i_ino;
1144 child_res_id->name[1] = dchild->d_inode->i_generation;
1146 child_res_id->name[0] = dchild->d_inum;
1147 child_res_id->name[1] = dchild->d_generation;
1150 if (res_gt(parent_res_id, child_res_id, NULL, NULL) ||
1151 res_gt(maxres, child_res_id, NULL, NULL)) {
1152 CDEBUG(D_DLMTRACE, "relock "LPU64"<("LPU64"|"LPU64")\n",
1153 child_res_id->name[0], parent_res_id->name[0],
1155 GOTO(cleanup, rc = 1);
1158 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1159 *child_res_id, LDLM_IBITS, child_policy,
1160 child_mode, &flags, mds_blocking_ast,
1161 ldlm_completion_ast, NULL, NULL, NULL, 0,
1164 GOTO(cleanup, rc = -EIO);
1167 memset(child_res_id, 0, sizeof(*child_res_id));
1173 switch(cleanup_phase) {
1175 if (child_res_id->name[0] != 0)
1176 ldlm_lock_decref(child_lockh, child_mode);
1178 ldlm_lock_decref(parent_lockh, parent_mode);
1184 int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds,
1186 struct lustre_handle *parent_lockh,
1187 struct dentry **dparentp, int parent_mode,
1188 __u64 parent_lockpart,
1189 char *name, int namelen,
1190 struct lustre_handle *child_lockh,
1191 struct dentry **dchildp, int child_mode,
1192 __u64 child_lockpart)
1194 struct ldlm_res_id child_res_id = { .name = {0} };
1195 struct ldlm_res_id parent_res_id = { .name = {0} };
1196 ldlm_policy_data_t parent_policy = {.l_inodebits = { parent_lockpart }};
1197 ldlm_policy_data_t child_policy = {.l_inodebits = { child_lockpart }};
1198 struct inode *inode;
1199 int rc = 0, cleanup_phase = 0;
1202 /* Step 1: Lookup parent */
1203 *dparentp = mds_fid2dentry(mds, fid, NULL);
1204 if (IS_ERR(*dparentp)) {
1205 rc = PTR_ERR(*dparentp);
1210 CDEBUG(D_INODE, "parent ino %lu, name %s\n",
1211 (*dparentp)->d_inode->i_ino, name);
1213 parent_res_id.name[0] = (*dparentp)->d_inode->i_ino;
1214 parent_res_id.name[1] = (*dparentp)->d_inode->i_generation;
1216 parent_lockh[1].cookie = 0;
1217 if (name && IS_PDIROPS((*dparentp)->d_inode)) {
1218 /* lock just dir { ino, generation } to flush client cache */
1219 if (parent_mode == LCK_PW) {
1220 struct ldlm_res_id res_id = { .name = {0} };
1221 ldlm_policy_data_t policy;
1223 res_id.name[0] = (*dparentp)->d_inode->i_ino;
1224 res_id.name[1] = (*dparentp)->d_inode->i_generation;
1225 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1226 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1228 &policy, LCK_CW, &flags,
1230 ldlm_completion_ast, NULL, NULL,
1231 NULL, 0, NULL, parent_lockh+1);
1236 parent_res_id.name[2] = full_name_hash(name, namelen - 1);
1237 CDEBUG(D_INFO, "take lock on %lu:%u:"LPX64"\n",
1238 (*dparentp)->d_inode->i_ino,
1239 (*dparentp)->d_inode->i_generation,
1240 parent_res_id.name[2]);
1244 cleanup_phase = 1; /* parent dentry */
1246 /* Step 2: Lookup child (without DLM lock, to get resource name) */
1247 *dchildp = ll_lookup_one_len(name, *dparentp, namelen - 1);
1248 if (IS_ERR(*dchildp)) {
1249 rc = PTR_ERR(*dchildp);
1250 CDEBUG(D_INODE, "child lookup error %d\n", rc);
1254 if ((*dchildp)->d_flags & DCACHE_CROSS_REF) {
1255 /* inode lives on another MDS: return * mds/ino/gen
1256 * and LOOKUP lock. drop possible UPDATE lock! */
1257 child_policy.l_inodebits.bits &= ~MDS_INODELOCK_UPDATE;
1258 child_policy.l_inodebits.bits |= MDS_INODELOCK_LOOKUP;
1259 child_res_id.name[0] = (*dchildp)->d_inum;
1260 child_res_id.name[1] = (*dchildp)->d_generation;
1264 inode = (*dchildp)->d_inode;
1266 inode = igrab(inode);
1270 child_res_id.name[0] = inode->i_ino;
1271 child_res_id.name[1] = inode->i_generation;
1276 cleanup_phase = 2; /* child dentry */
1278 /* Step 3: Lock parent and child in resource order. If child doesn't
1279 * exist, we still have to lock the parent and re-lookup. */
1280 rc = enqueue_ordered_locks(obd,&parent_res_id,parent_lockh,parent_mode,
1281 &parent_policy, &child_res_id, child_lockh,
1282 child_mode, &child_policy);
1286 if ((*dchildp)->d_inode || ((*dchildp)->d_flags & DCACHE_CROSS_REF))
1287 cleanup_phase = 4; /* child lock */
1289 cleanup_phase = 3; /* parent lock */
1291 /* Step 4: Re-lookup child to verify it hasn't changed since locking */
1292 rc = mds_verify_child(obd, &parent_res_id, parent_lockh, *dparentp,
1293 parent_mode, &child_res_id, child_lockh,
1294 dchildp, child_mode, &child_policy,
1295 name, namelen, &parent_res_id);
1305 switch (cleanup_phase) {
1307 ldlm_lock_decref(child_lockh, child_mode);
1309 ldlm_lock_decref(parent_lockh, parent_mode);
1314 if (parent_lockh[1].cookie)
1315 ldlm_lock_decref(parent_lockh + 1, LCK_CW);
1324 void mds_reconstruct_generic(struct ptlrpc_request *req)
1326 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1328 mds_req_from_mcd(req, med->med_mcd);
1331 int mds_create_local_dentry(struct mds_update_record *rec,
1332 struct obd_device *obd)
1334 struct mds_obd *mds = &obd->u.mds;
1335 struct inode *fids_dir = mds->mds_fids_dir->d_inode;
1336 int fidlen = 0, rc, cleanup_phase = 0;
1337 struct dentry *new_child = NULL;
1338 char *fidname = rec->ur_name;
1339 struct dentry *child = NULL;
1340 struct lustre_handle lockh[2] = {{0}, {0}};
1344 down(&fids_dir->i_sem);
1345 fidlen = ll_fid2str(fidname, rec->ur_fid1->id, rec->ur_fid1->generation);
1346 CDEBUG(D_OTHER, "look for local dentry '%s' for %u/%u\n",
1347 fidname, (unsigned) rec->ur_fid1->id,
1348 (unsigned) rec->ur_fid1->generation);
1350 new_child = lookup_one_len(fidname, mds->mds_fids_dir, fidlen);
1351 up(&fids_dir->i_sem);
1352 if (IS_ERR(new_child)) {
1353 CERROR("can't lookup %s: %d\n", fidname,
1354 (int) PTR_ERR(new_child));
1355 GOTO(cleanup, rc = PTR_ERR(new_child));
1359 if (new_child->d_inode != NULL) {
1360 /* nice. we've already have local dentry! */
1361 CDEBUG(D_OTHER, "found dentry in FIDS/: %u/%u\n",
1362 (unsigned) new_child->d_inode->i_ino,
1363 (unsigned) new_child->d_inode->i_generation);
1364 rec->ur_fid1->id = fids_dir->i_ino;
1365 rec->ur_fid1->generation = fids_dir->i_generation;
1366 rec->ur_namelen = fidlen + 1;
1367 GOTO(cleanup, rc = 0);
1370 /* new, local dentry will be added soon. we need no aliases here */
1373 child = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, LCK_EX,
1374 lockh, NULL, 0, MDS_INODELOCK_UPDATE);
1375 if (IS_ERR(child)) {
1376 CERROR("can't get victim\n");
1377 GOTO(cleanup, rc = PTR_ERR(child));
1381 handle = fsfilt_start(obd, fids_dir, FSFILT_OP_LINK, NULL);
1383 GOTO(cleanup, rc = PTR_ERR(handle));
1385 rc = fsfilt_add_dir_entry(obd, mds->mds_fids_dir, fidname, fidlen,
1386 rec->ur_fid1->id, rec->ur_fid1->generation,
1389 CERROR("error linking orphan %lu/%lu to FIDS: rc = %d\n",
1390 (unsigned long) child->d_inode->i_ino,
1391 (unsigned long) child->d_inode->i_generation, rc);
1393 if (S_ISDIR(child->d_inode->i_mode)) {
1394 fids_dir->i_nlink++;
1395 mark_inode_dirty(fids_dir);
1397 mark_inode_dirty(child->d_inode);
1399 fsfilt_commit(obd, fids_dir, handle, 0);
1401 rec->ur_fid1->id = fids_dir->i_ino;
1402 rec->ur_fid1->generation = fids_dir->i_generation;
1403 rec->ur_namelen = fidlen + 1;
1406 switch(cleanup_phase) {
1408 ldlm_lock_decref(lockh, LCK_EX);
1418 static int mds_copy_unlink_reply(struct ptlrpc_request *master,
1419 struct ptlrpc_request *slave)
1421 void *cookie, *cookie2;
1422 struct mds_body *body2;
1423 struct mds_body *body;
1427 body = lustre_msg_buf(slave->rq_repmsg, 0, sizeof(*body));
1428 LASSERT(body != NULL);
1430 body2 = lustre_msg_buf(master->rq_repmsg, 0, sizeof (*body));
1431 LASSERT(body2 != NULL);
1433 if (!(body->valid & (OBD_MD_FLID | OBD_MD_FLGENER))) {
1437 memcpy(body2, body, sizeof(*body));
1438 body2->valid &= ~OBD_MD_FLCOOKIE;
1440 if (!(body->valid & OBD_MD_FLEASIZE) &&
1441 !(body->valid & OBD_MD_FLDIREA))
1444 if (body->eadatasize == 0) {
1445 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1449 LASSERT(master->rq_repmsg->buflens[1] >= body->eadatasize);
1451 ea = lustre_msg_buf(slave->rq_repmsg, 1, body->eadatasize);
1452 LASSERT(ea != NULL);
1454 ea2 = lustre_msg_buf(master->rq_repmsg, 1, body->eadatasize);
1455 LASSERT(ea2 != NULL);
1457 memcpy(ea2, ea, body->eadatasize);
1459 if (body->valid & OBD_MD_FLCOOKIE) {
1460 LASSERT(master->rq_repmsg->buflens[2] >=
1461 slave->rq_repmsg->buflens[2]);
1462 cookie = lustre_msg_buf(slave->rq_repmsg, 2,
1463 slave->rq_repmsg->buflens[2]);
1464 LASSERT(cookie != NULL);
1466 cookie2 = lustre_msg_buf(master->rq_repmsg, 2,
1467 master->rq_repmsg->buflens[2]);
1468 LASSERT(cookie2 != NULL);
1469 memcpy(cookie2, cookie, slave->rq_repmsg->buflens[2]);
1470 body2->valid |= OBD_MD_FLCOOKIE;
1475 static int mds_reint_unlink_remote(struct mds_update_record *rec, int offset,
1476 struct ptlrpc_request *req,
1477 struct lustre_handle *parent_lockh,
1478 struct dentry *dparent,
1479 struct lustre_handle *child_lockh,
1480 struct dentry *dchild)
1482 struct mds_obd *mds = mds_req2mds(req);
1483 struct mdc_op_data op_data;
1484 int rc = 0, cleanup_phase = 0;
1485 struct ptlrpc_request *request = NULL;
1488 LASSERT(offset == 0 || offset == 2);
1490 DEBUG_REQ(D_INODE, req, "unlink %*s (remote inode %u/%u/%u)",
1491 rec->ur_namelen - 1, rec->ur_name, (unsigned)dchild->d_mdsnum,
1492 (unsigned) dchild->d_inum, (unsigned) dchild->d_generation);
1494 /* time to drop i_nlink on remote MDS */
1495 op_data.fid1.mds = dchild->d_mdsnum;
1496 op_data.fid1.id = dchild->d_inum;
1497 op_data.fid1.generation = dchild->d_generation;
1498 op_data.create_mode = rec->ur_mode;
1499 op_data.namelen = 0;
1500 op_data.name = NULL;
1501 rc = md_unlink(mds->mds_lmv_exp, &op_data, &request);
1504 mds_copy_unlink_reply(req, request);
1505 ptlrpc_req_finished(request);
1508 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, dchild);
1509 req->rq_status = rc;
1512 if (parent_lockh[1].cookie != 0)
1513 ldlm_lock_decref(parent_lockh + 1, LCK_CW);
1515 ldlm_lock_decref(child_lockh, LCK_EX);
1517 ldlm_lock_decref(parent_lockh, LCK_PW);
1519 ptlrpc_save_lock(req, parent_lockh, LCK_PW);
1526 static int mds_reint_unlink(struct mds_update_record *rec, int offset,
1527 struct ptlrpc_request *req,
1528 struct lustre_handle *lh)
1530 struct dentry *dparent, *dchild;
1531 struct mds_obd *mds = mds_req2mds(req);
1532 struct obd_device *obd = req->rq_export->exp_obd;
1533 struct mds_body *body = NULL;
1534 struct inode *child_inode;
1535 struct lustre_handle parent_lockh[2] = {{0}, {0}};
1536 struct lustre_handle child_lockh = {0}, child_reuse_lockh = {0};
1537 char fidname[LL_FID_NAMELEN];
1538 void *handle = NULL;
1539 int rc = 0, log_unlink = 0, cleanup_phase = 0;
1540 int unlink_by_fid = 0;
1543 LASSERT(offset == 0 || offset == 2);
1545 DEBUG_REQ(D_INODE, req, "parent ino "LPU64"/%u, child %s",
1546 rec->ur_fid1->id, rec->ur_fid1->generation, rec->ur_name);
1548 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1550 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
1551 GOTO(cleanup, rc = -ENOENT);
1553 if (rec->ur_namelen == 1) {
1554 /* this is request to drop i_nlink on local inode */
1556 rec->ur_name = fidname;
1557 rc = mds_create_local_dentry(rec, obd);
1560 rc = mds_get_parent_child_locked(obd, mds, rec->ur_fid1,
1561 parent_lockh, &dparent, LCK_PW,
1562 MDS_INODELOCK_UPDATE,
1563 rec->ur_name, rec->ur_namelen,
1564 &child_lockh, &dchild, LCK_EX,
1565 MDS_INODELOCK_LOOKUP|MDS_INODELOCK_UPDATE);
1569 if (dchild->d_flags & DCACHE_CROSS_REF) {
1570 /* we should have parent lock only here */
1571 LASSERT(unlink_by_fid == 0);
1572 LASSERT(dchild->d_mdsnum != mds->mds_num);
1573 mds_reint_unlink_remote(rec, offset, req, parent_lockh,
1574 dparent, &child_lockh, dchild);
1578 cleanup_phase = 1; /* dchild, dparent, locks */
1581 child_inode = dchild->d_inode;
1582 if (child_inode == NULL) {
1583 CDEBUG(D_INODE, "child doesn't exist (dir %lu, name %s)\n",
1584 dparent ? dparent->d_inode->i_ino : 0, rec->ur_name);
1585 GOTO(cleanup, rc = -ENOENT);
1588 cleanup_phase = 2; /* dchild has a lock */
1590 /* Step 4: Get a lock on the ino to sync with creation WRT inode
1591 * reuse (see bug 2029). */
1592 rc = mds_lock_new_child(obd, child_inode, &child_reuse_lockh);
1596 cleanup_phase = 3; /* child inum lock */
1598 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dparent->d_inode->i_sb);
1600 /* ldlm_reply in buf[0] if called via intent */
1604 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
1605 LASSERT(body != NULL);
1607 /* If this is the last reference to this inode, get the OBD EA
1608 * data first so the client can destroy OST objects.
1609 * we only do the object removal if no open files remain.
1610 * Nobody can get at this name anymore because of the locks so
1611 * we make decisions here as to whether to remove the inode */
1612 if (S_ISREG(child_inode->i_mode) && child_inode->i_nlink == 1 &&
1613 mds_open_orphan_count(child_inode) == 0) {
1614 mds_pack_inode2fid(obd, &body->fid1, child_inode);
1615 mds_pack_inode2body(obd, body, child_inode);
1616 mds_pack_md(obd, req->rq_repmsg, offset + 1, body,
1618 if (!(body->valid & OBD_MD_FLEASIZE)) {
1619 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
1620 OBD_MD_FLATIME | OBD_MD_FLMTIME);
1626 /* We have to do these checks ourselves, in case we are making an
1627 * orphan. The client tells us whether rmdir() or unlink() was called,
1628 * so we need to return appropriate errors (bug 72).
1630 * We don't have to check permissions, because vfs_rename (called from
1631 * mds_open_unlink_rename) also calls may_delete. */
1632 if ((rec->ur_mode & S_IFMT) == S_IFDIR) {
1633 if (!S_ISDIR(child_inode->i_mode))
1634 GOTO(cleanup, rc = -ENOTDIR);
1636 if (S_ISDIR(child_inode->i_mode))
1637 GOTO(cleanup, rc = -EISDIR);
1640 /* Step 4: Do the unlink: we already verified ur_mode above (bug 72) */
1641 switch (child_inode->i_mode & S_IFMT) {
1643 /* Drop any lingering child directories before we start our
1644 * transaction, to avoid doing multiple inode dirty/delete
1645 * in our compound transaction (bug 1321). */
1646 shrink_dcache_parent(dchild);
1647 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
1650 GOTO(cleanup, rc = PTR_ERR(handle));
1651 cleanup_phase = 4; /* transaction */
1652 rc = vfs_rmdir(dparent->d_inode, dchild);
1655 #warning "optimization is possible here: we could drop nlink w/o removing local dentry in FIDS/"
1656 struct lov_mds_md *lmm = lustre_msg_buf(req->rq_repmsg,
1658 handle = fsfilt_start_log(obd, dparent->d_inode,
1659 FSFILT_OP_UNLINK, NULL,
1660 le32_to_cpu(lmm->lmm_stripe_count));
1662 GOTO(cleanup, rc = PTR_ERR(handle));
1664 cleanup_phase = 4; /* transaction */
1665 rc = vfs_unlink(dparent->d_inode, dchild);
1667 if (!rc && log_unlink)
1668 if (mds_log_op_unlink(obd, child_inode,
1669 lustre_msg_buf(req->rq_repmsg, offset + 1, 0),
1670 req->rq_repmsg->buflens[offset + 1],
1671 lustre_msg_buf(req->rq_repmsg, offset + 2, 0),
1672 req->rq_repmsg->buflens[offset + 2]) > 0)
1673 body->valid |= OBD_MD_FLCOOKIE;
1681 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK,
1684 GOTO(cleanup, rc = PTR_ERR(handle));
1685 cleanup_phase = 4; /* transaction */
1686 rc = vfs_unlink(dparent->d_inode, dchild);
1689 CERROR("bad file type %o unlinking %s\n", rec->ur_mode,
1692 GOTO(cleanup, rc = -EINVAL);
1700 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
1701 LTIME_S(iattr.ia_mtime) = LTIME_S(rec->ur_time);
1702 LTIME_S(iattr.ia_ctime) = LTIME_S(rec->ur_time);
1704 err = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
1706 CERROR("error on parent setattr: rc = %d\n", err);
1709 switch(cleanup_phase) {
1711 LASSERT(dchild != NULL && dchild->d_inode != NULL);
1712 LASSERT(atomic_read(&dchild->d_inode->i_count) > 0);
1713 if (rc == 0 && dchild->d_inode->i_nlink == 0 &&
1714 mds_open_orphan_count(dchild->d_inode) > 0) {
1715 /* filesystem is really going to destroy an inode
1716 * we have to delay this till inode is opened -bzzz */
1717 mds_open_unlink_rename(rec, obd, dparent, dchild, NULL);
1719 rc = mds_finish_transno(mds, dparent->d_inode, handle, req,
1722 (void)obd_set_info(mds->mds_osc_exp, strlen("unlinked"),
1723 "unlinked", 0, NULL);
1724 case 3: /* child ino-reuse lock */
1725 if (rc && body != NULL) {
1726 // Don't unlink the OST objects if the MDS unlink failed
1730 ldlm_lock_decref(&child_reuse_lockh, LCK_EX);
1732 ptlrpc_save_lock(req, &child_reuse_lockh, LCK_EX);
1733 case 2: /* child lock */
1734 ldlm_lock_decref(&child_lockh, LCK_EX);
1735 case 1: /* child and parent dentry, parent lock */
1737 if (parent_lockh[1].cookie != 0)
1738 ldlm_lock_decref(parent_lockh + 1, LCK_CW);
1741 ldlm_lock_decref(parent_lockh, LCK_PW);
1743 ptlrpc_save_lock(req, parent_lockh, LCK_PW);
1750 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1753 req->rq_status = rc;
1758 * to service requests from remote MDS to increment i_nlink
1760 static int mds_reint_link_acquire(struct mds_update_record *rec,
1761 int offset, struct ptlrpc_request *req,
1762 struct lustre_handle *lh)
1764 struct obd_device *obd = req->rq_export->exp_obd;
1765 struct ldlm_res_id src_res_id = { .name = {0} };
1766 struct lustre_handle *handle = NULL, src_lockh = {0};
1767 struct mds_obd *mds = mds_req2mds(req);
1768 int rc = 0, cleanup_phase = 0;
1769 struct dentry *de_src = NULL;
1770 ldlm_policy_data_t policy;
1774 DEBUG_REQ(D_INODE, req, "%s: request to acquire i_nlinks %u/%u/%u\n",
1775 obd->obd_name, (unsigned) rec->ur_fid1->mds,
1776 (unsigned) rec->ur_fid1->id,
1777 (unsigned) rec->ur_fid1->generation);
1779 /* Step 1: Lookup the source inode and target directory by FID */
1780 de_src = mds_fid2dentry(mds, rec->ur_fid1, NULL);
1782 GOTO(cleanup, rc = PTR_ERR(de_src));
1783 cleanup_phase = 1; /* source dentry */
1785 src_res_id.name[0] = de_src->d_inode->i_ino;
1786 src_res_id.name[1] = de_src->d_inode->i_generation;
1787 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1789 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1790 src_res_id, LDLM_IBITS, &policy,
1791 LCK_EX, &flags, mds_blocking_ast,
1792 ldlm_completion_ast, NULL, NULL,
1793 NULL, 0, NULL, &src_lockh);
1795 GOTO(cleanup, rc = -ENOLCK);
1796 cleanup_phase = 2; /* lock */
1798 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
1800 handle = fsfilt_start(obd, de_src->d_inode, FSFILT_OP_LINK, NULL);
1801 if (IS_ERR(handle)) {
1802 rc = PTR_ERR(handle);
1805 de_src->d_inode->i_nlink++;
1806 mark_inode_dirty(de_src->d_inode);
1809 rc = mds_finish_transno(mds, de_src ? de_src->d_inode : NULL,
1810 handle, req, rc, 0);
1812 switch (cleanup_phase) {
1815 ldlm_lock_decref(&src_lockh, LCK_EX);
1817 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
1823 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1826 req->rq_status = rc;
1831 * request to link to foreign inode:
1832 * - acquire i_nlinks on this inode
1835 static int mds_reint_link_to_remote(struct mds_update_record *rec,
1836 int offset, struct ptlrpc_request *req,
1837 struct lustre_handle *lh)
1839 struct lustre_handle *handle = NULL, tgt_dir_lockh[2] = {{0}, {0}};
1840 struct obd_device *obd = req->rq_export->exp_obd;
1841 struct dentry *de_tgt_dir = NULL;
1842 struct mds_obd *mds = mds_req2mds(req);
1843 int rc = 0, cleanup_phase = 0;
1844 struct mdc_op_data op_data;
1845 struct ptlrpc_request *request = NULL;
1848 #define fmt "%s: request to link %u/%u/%u:%*s to foreign inode %u/%u/%u\n"
1849 DEBUG_REQ(D_INODE, req, fmt, obd->obd_name,
1850 (unsigned) rec->ur_fid2->mds,
1851 (unsigned) rec->ur_fid2->id,
1852 (unsigned) rec->ur_fid2->generation,
1853 rec->ur_namelen - 1, rec->ur_name,
1854 (unsigned) rec->ur_fid1->mds,
1855 (unsigned) rec->ur_fid1->id,
1856 (unsigned)rec->ur_fid1->generation);
1858 de_tgt_dir = mds_fid2locked_dentry(obd, rec->ur_fid2, NULL, LCK_EX,
1859 tgt_dir_lockh, rec->ur_name,
1860 rec->ur_namelen - 1,
1861 MDS_INODELOCK_UPDATE);
1862 if (IS_ERR(de_tgt_dir))
1863 GOTO(cleanup, rc = PTR_ERR(de_tgt_dir));
1866 op_data.fid1 = *(rec->ur_fid1);
1867 op_data.namelen = 0;
1868 op_data.name = NULL;
1869 rc = md_link(mds->mds_lmv_exp, &op_data, &request);
1875 ptlrpc_req_finished(request);
1877 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_tgt_dir->d_inode->i_sb);
1879 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
1880 if (IS_ERR(handle)) {
1881 rc = PTR_ERR(handle);
1885 rc = fsfilt_add_dir_entry(obd, de_tgt_dir, rec->ur_name,
1886 rec->ur_namelen - 1, rec->ur_fid1->id,
1887 rec->ur_fid1->generation, rec->ur_fid1->mds);
1891 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
1892 handle, req, rc, 0);
1895 switch (cleanup_phase) {
1898 /* FIXME: drop i_nlink on remote inode here */
1899 CERROR("MUST drop drop i_nlink here\n");
1904 ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
1906 ldlm_lock_decref(tgt_dir_lockh + 1, LCK_CW);
1909 ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
1911 ptlrpc_save_lock(req, tgt_dir_lockh + 1, LCK_CW);
1917 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1920 req->rq_status = rc;
1924 static int mds_reint_link(struct mds_update_record *rec, int offset,
1925 struct ptlrpc_request *req,
1926 struct lustre_handle *lh)
1928 struct obd_device *obd = req->rq_export->exp_obd;
1929 struct dentry *de_src = NULL;
1930 struct dentry *de_tgt_dir = NULL;
1931 struct dentry *dchild = NULL;
1932 struct mds_obd *mds = mds_req2mds(req);
1933 struct lustre_handle *handle = NULL;
1934 struct lustre_handle tgt_dir_lockh[2] = {{0}, {0}}, src_lockh = {0};
1935 struct ldlm_res_id src_res_id = { .name = {0} };
1936 struct ldlm_res_id tgt_dir_res_id = { .name = {0} };
1937 ldlm_policy_data_t src_policy ={.l_inodebits = {MDS_INODELOCK_UPDATE}};
1938 ldlm_policy_data_t tgt_dir_policy =
1939 {.l_inodebits = {MDS_INODELOCK_UPDATE}};
1941 int rc = 0, cleanup_phase = 0;
1944 LASSERT(offset == 0);
1946 DEBUG_REQ(D_INODE, req, "original "LPU64"/%u to "LPU64"/%u %s",
1947 rec->ur_fid1->id, rec->ur_fid1->generation,
1948 rec->ur_fid2->id, rec->ur_fid2->generation, rec->ur_name);
1950 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1952 // memset(tgt_dir_lockh, 0, 2*sizeof(tgt_dir_lockh[0]));
1953 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
1954 GOTO(cleanup, rc = -ENOENT);
1956 if (rec->ur_fid1->mds != mds->mds_num) {
1957 rc = mds_reint_link_to_remote(rec, offset, req, lh);
1961 if (rec->ur_namelen == 1) {
1962 rc = mds_reint_link_acquire(rec, offset, req, lh);
1966 /* Step 1: Lookup the source inode and target directory by FID */
1967 de_src = mds_fid2dentry(mds, rec->ur_fid1, NULL);
1969 GOTO(cleanup, rc = PTR_ERR(de_src));
1971 cleanup_phase = 1; /* source dentry */
1973 de_tgt_dir = mds_fid2dentry(mds, rec->ur_fid2, NULL);
1974 if (IS_ERR(de_tgt_dir)) {
1975 rc = PTR_ERR(de_tgt_dir);
1980 cleanup_phase = 2; /* target directory dentry */
1982 CDEBUG(D_INODE, "linking %*s/%s to inode %lu\n",
1983 de_tgt_dir->d_name.len, de_tgt_dir->d_name.name, rec->ur_name,
1984 de_src->d_inode->i_ino);
1986 /* Step 2: Take the two locks */
1987 src_res_id.name[0] = de_src->d_inode->i_ino;
1988 src_res_id.name[1] = de_src->d_inode->i_generation;
1989 tgt_dir_res_id.name[0] = de_tgt_dir->d_inode->i_ino;
1990 tgt_dir_res_id.name[1] = de_tgt_dir->d_inode->i_generation;
1992 if (IS_PDIROPS(de_tgt_dir->d_inode)) {
1994 /* Get a temp lock on just ino, gen to flush client cache */
1995 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1996 tgt_dir_res_id, LDLM_IBITS, &src_policy,
1997 LCK_CW, &flags, mds_blocking_ast,
1998 ldlm_completion_ast, NULL, NULL,
1999 NULL, 0, NULL, tgt_dir_lockh + 1);
2001 GOTO(cleanup, rc = -ENOLCK);
2003 tgt_dir_res_id.name[2] = full_name_hash(rec->ur_name,
2004 rec->ur_namelen - 1);
2005 CDEBUG(D_INFO, "take lock on %lu:%u:"LPX64"\n",
2006 de_tgt_dir->d_inode->i_ino,
2007 de_tgt_dir->d_inode->i_generation,
2008 tgt_dir_res_id.name[2]);
2011 rc = enqueue_ordered_locks(obd, &src_res_id, &src_lockh, LCK_EX,
2013 &tgt_dir_res_id, tgt_dir_lockh, LCK_EX,
2018 cleanup_phase = 3; /* locks */
2020 /* Step 3: Lookup the child */
2021 dchild = ll_lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen-1);
2022 if (IS_ERR(dchild)) {
2023 rc = PTR_ERR(dchild);
2024 if (rc != -EPERM && rc != -EACCES)
2025 CERROR("child lookup error %d\n", rc);
2029 cleanup_phase = 4; /* child dentry */
2031 if (dchild->d_inode) {
2032 CDEBUG(D_INODE, "child exists (dir %lu, name %s)\n",
2033 de_tgt_dir->d_inode->i_ino, rec->ur_name);
2038 /* Step 4: Do it. */
2039 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
2041 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
2042 if (IS_ERR(handle)) {
2043 rc = PTR_ERR(handle);
2047 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
2048 if (rc && rc != -EPERM && rc != -EACCES)
2049 CERROR("vfs_link error %d\n", rc);
2051 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
2052 handle, req, rc, 0);
2055 switch (cleanup_phase) {
2056 case 4: /* child dentry */
2060 ldlm_lock_decref(&src_lockh, LCK_EX);
2061 ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
2063 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
2064 ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
2066 case 2: /* target dentry */
2068 if (tgt_dir_lockh[1].cookie)
2069 ldlm_lock_decref(tgt_dir_lockh + 1, LCK_CW);
2073 case 1: /* source dentry */
2078 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2081 req->rq_status = rc;
2086 * add a hard link in the PENDING directory, only used by rename()
2088 static int mds_add_link_orphan(struct mds_update_record *rec,
2089 struct obd_device *obd,
2090 struct dentry *dentry)
2092 struct mds_obd *mds = &obd->u.mds;
2093 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
2094 struct dentry *pending_child;
2095 char fidname[LL_FID_NAMELEN];
2099 LASSERT(dentry->d_inode);
2100 LASSERT(!mds_inode_is_orphan(dentry->d_inode));
2102 down(&pending_dir->i_sem);
2103 fidlen = ll_fid2str(fidname, dentry->d_inode->i_ino,
2104 dentry->d_inode->i_generation);
2106 CDEBUG(D_ERROR, "pending destroy of %dx open file %s = %s\n",
2107 mds_open_orphan_count(dentry->d_inode),
2108 rec->ur_name, fidname);
2110 pending_child = lookup_one_len(fidname, mds->mds_pending_dir, fidlen);
2111 if (IS_ERR(pending_child))
2112 GOTO(out_lock, rc = PTR_ERR(pending_child));
2114 if (pending_child->d_inode != NULL) {
2115 CERROR("re-destroying orphan file %s?\n", rec->ur_name);
2116 LASSERT(pending_child->d_inode == dentry->d_inode);
2117 GOTO(out_dput, rc = 0);
2121 rc = vfs_link(dentry, pending_dir, pending_child);
2124 CERROR("error addlink orphan %s to PENDING: rc = %d\n",
2127 mds_inode_set_orphan(dentry->d_inode);
2129 l_dput(pending_child);
2131 up(&pending_dir->i_sem);
2135 /* The idea here is that we need to get four locks in the end:
2136 * one on each parent directory, one on each child. We need to take
2137 * these locks in some kind of order (to avoid deadlocks), and the order
2138 * I selected is "increasing resource number" order. We need to look up
2139 * the children, however, before we know what the resource number(s) are.
2140 * Thus the following plan:
2142 * 1,2. Look up the parents
2143 * 3,4. Look up the children
2144 * 5. Take locks on the parents and children, in order
2145 * 6. Verify that the children haven't changed since they were looked up
2147 * If there was a race and the children changed since they were first looked
2148 * up, it is possible that mds_verify_child() will be able to just grab the
2149 * lock on the new child resource (if it has a higher resource than any other)
2150 * but we need to compare against not only its parent, but also against the
2151 * parent and child of the "other half" of the rename, hence maxres_{src,tgt}.
2153 * We need the fancy igrab() on the child inodes because we aren't holding a
2154 * lock on the parent after the lookup is done, so dentry->d_inode may change
2155 * at any time, and igrab() itself doesn't like getting passed a NULL argument.
2157 static int mds_get_parents_children_locked(struct obd_device *obd,
2158 struct mds_obd *mds,
2159 struct ll_fid *p1_fid,
2160 struct dentry **de_srcdirp,
2161 struct ll_fid *p2_fid,
2162 struct dentry **de_tgtdirp,
2164 const char *old_name, int old_len,
2165 struct dentry **de_oldp,
2166 const char *new_name, int new_len,
2167 struct dentry **de_newp,
2168 struct lustre_handle *dlm_handles,
2171 struct ldlm_res_id p1_res_id = { .name = {0} };
2172 struct ldlm_res_id p2_res_id = { .name = {0} };
2173 struct ldlm_res_id c1_res_id = { .name = {0} };
2174 struct ldlm_res_id c2_res_id = { .name = {0} };
2175 ldlm_policy_data_t p_policy = {.l_inodebits = {MDS_INODELOCK_UPDATE}};
2176 /* Only dentry should change, but the inode itself would be
2178 ldlm_policy_data_t c1_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP}};
2179 /* If something is going to be replaced, both dentry and inode locks are
2181 ldlm_policy_data_t c2_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP|
2182 MDS_INODELOCK_UPDATE}};
2183 struct ldlm_res_id *maxres_src, *maxres_tgt;
2184 struct inode *inode;
2185 int rc = 0, cleanup_phase = 0;
2188 /* Step 1: Lookup the source directory */
2189 *de_srcdirp = mds_fid2dentry(mds, p1_fid, NULL);
2190 if (IS_ERR(*de_srcdirp))
2191 GOTO(cleanup, rc = PTR_ERR(*de_srcdirp));
2193 cleanup_phase = 1; /* source directory dentry */
2195 p1_res_id.name[0] = (*de_srcdirp)->d_inode->i_ino;
2196 p1_res_id.name[1] = (*de_srcdirp)->d_inode->i_generation;
2198 /* Step 2: Lookup the target directory */
2199 if (memcmp(p1_fid, p2_fid, sizeof(*p1_fid)) == 0) {
2200 *de_tgtdirp = dget(*de_srcdirp);
2202 *de_tgtdirp = mds_fid2dentry(mds, p2_fid, NULL);
2203 if (IS_ERR(*de_tgtdirp)) {
2204 rc = PTR_ERR(*de_tgtdirp);
2210 cleanup_phase = 2; /* target directory dentry */
2212 p2_res_id.name[0] = (*de_tgtdirp)->d_inode->i_ino;
2213 p2_res_id.name[1] = (*de_tgtdirp)->d_inode->i_generation;
2216 dlm_handles[5].cookie = 0;
2217 dlm_handles[6].cookie = 0;
2218 if (IS_PDIROPS((*de_srcdirp)->d_inode)) {
2219 /* Get a temp lock on just ino, gen to flush client cache */
2220 rc = enqueue_ordered_locks(obd, &p1_res_id, &(dlm_handles[5]),
2221 LCK_CW, &p_policy, &p2_res_id,
2222 &(dlm_handles[6]),LCK_CW,&p_policy);
2226 p1_res_id.name[2] = full_name_hash(old_name, old_len - 1);
2227 p2_res_id.name[2] = full_name_hash(new_name, new_len - 1);
2228 CDEBUG(D_INFO, "take locks on %lu:%u:"LPX64", %lu:%u:"LPX64"\n",
2229 (*de_srcdirp)->d_inode->i_ino,
2230 (*de_srcdirp)->d_inode->i_generation, p1_res_id.name[2],
2231 (*de_tgtdirp)->d_inode->i_ino,
2232 (*de_tgtdirp)->d_inode->i_generation, p2_res_id.name[2]);
2236 /* Step 3: Lookup the source child entry */
2237 *de_oldp = ll_lookup_one_len(old_name, *de_srcdirp, old_len - 1);
2238 if (IS_ERR(*de_oldp)) {
2239 rc = PTR_ERR(*de_oldp);
2240 CERROR("old child lookup error (%*s): %d\n",
2241 old_len - 1, old_name, rc);
2245 cleanup_phase = 3; /* original name dentry */
2247 inode = (*de_oldp)->d_inode;
2248 if (inode != NULL) {
2249 inode = igrab(inode);
2251 GOTO(cleanup, rc = -ENOENT);
2253 c1_res_id.name[0] = inode->i_ino;
2254 c1_res_id.name[1] = inode->i_generation;
2256 } else if ((*de_oldp)->d_flags & DCACHE_CROSS_REF) {
2257 c1_res_id.name[0] = (*de_oldp)->d_inum;
2258 c1_res_id.name[1] = (*de_oldp)->d_generation;
2261 /* Step 4: Lookup the target child entry */
2262 *de_newp = ll_lookup_one_len(new_name, *de_tgtdirp, new_len - 1);
2263 if (IS_ERR(*de_newp)) {
2264 rc = PTR_ERR(*de_newp);
2265 CERROR("new child lookup error (%*s): %d\n",
2266 old_len - 1, old_name, rc);
2270 cleanup_phase = 4; /* target dentry */
2272 inode = (*de_newp)->d_inode;
2273 if (inode != NULL) {
2274 inode = igrab(inode);
2278 c2_res_id.name[0] = inode->i_ino;
2279 c2_res_id.name[1] = inode->i_generation;
2281 } else if ((*de_newp)->d_flags & DCACHE_CROSS_REF) {
2282 c2_res_id.name[0] = (*de_newp)->d_inum;
2283 c2_res_id.name[1] = (*de_newp)->d_generation;
2287 /* Step 5: Take locks on the parents and child(ren) */
2288 maxres_src = &p1_res_id;
2289 maxres_tgt = &p2_res_id;
2290 cleanup_phase = 4; /* target dentry */
2292 if (c1_res_id.name[0] != 0 && res_gt(&c1_res_id, &p1_res_id, NULL,NULL))
2293 maxres_src = &c1_res_id;
2294 if (c2_res_id.name[0] != 0 && res_gt(&c2_res_id, &p2_res_id, NULL,NULL))
2295 maxres_tgt = &c2_res_id;
2297 rc = enqueue_4ordered_locks(obd, &p1_res_id,&dlm_handles[0],parent_mode,
2299 &p2_res_id, &dlm_handles[1], parent_mode,
2301 &c1_res_id, &dlm_handles[2], child_mode,
2303 &c2_res_id, &dlm_handles[3], child_mode,
2308 cleanup_phase = 6; /* parent and child(ren) locks */
2310 /* Step 6a: Re-lookup source child to verify it hasn't changed */
2311 rc = mds_verify_child(obd, &p1_res_id, &dlm_handles[0], *de_srcdirp,
2312 parent_mode, &c1_res_id, &dlm_handles[2],
2313 de_oldp, child_mode, &c1_policy, old_name,old_len,
2316 if (c2_res_id.name[0] != 0)
2317 ldlm_lock_decref(&dlm_handles[3], child_mode);
2318 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2325 if (!DENTRY_VALID(*de_oldp))
2326 GOTO(cleanup, rc = -ENOENT);
2328 /* Step 6b: Re-lookup target child to verify it hasn't changed */
2329 rc = mds_verify_child(obd, &p2_res_id, &dlm_handles[1], *de_tgtdirp,
2330 parent_mode, &c2_res_id, &dlm_handles[3],
2331 de_newp, child_mode, &c2_policy, new_name,
2332 new_len, maxres_src);
2334 ldlm_lock_decref(&dlm_handles[2], child_mode);
2335 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2345 switch (cleanup_phase) {
2346 case 6: /* child lock(s) */
2347 if (c2_res_id.name[0] != 0)
2348 ldlm_lock_decref(&dlm_handles[3], child_mode);
2349 if (c1_res_id.name[0] != 0)
2350 ldlm_lock_decref(&dlm_handles[2], child_mode);
2351 case 5: /* parent locks */
2352 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2353 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2354 case 4: /* target dentry */
2356 case 3: /* source dentry */
2358 case 2: /* target directory dentry */
2359 l_dput(*de_tgtdirp);
2360 case 1: /* source directry dentry */
2361 l_dput(*de_srcdirp);
2368 static int mds_reint_rename_create_name(struct mds_update_record *rec,
2369 int offset, struct ptlrpc_request *req)
2371 struct obd_device *obd = req->rq_export->exp_obd;
2372 struct dentry *de_srcdir = NULL;
2373 struct dentry *de_new = NULL;
2374 struct mds_obd *mds = mds_req2mds(req);
2375 struct lustre_handle parent_lockh[2] = {{0}, {0}};
2376 struct lustre_handle child_lockh = {0};
2377 int cleanup_phase = 0;
2378 void *handle = NULL;
2382 /* another MDS executing rename operation has asked us
2383 * to create target name. such a creation should destroy
2384 * existing target name */
2386 CDEBUG(D_OTHER, "%s: request to create name %s for %lu/%lu/%lu\n",
2387 obd->obd_name, rec->ur_tgt,
2388 (unsigned long) rec->ur_fid1->mds,
2389 (unsigned long) rec->ur_fid1->id,
2390 (unsigned long) rec->ur_fid1->generation);
2392 /* first, lookup the target */
2393 child_lockh.cookie = 0;
2394 rc = mds_get_parent_child_locked(obd, mds, rec->ur_fid2, parent_lockh,
2395 &de_srcdir,LCK_PW,MDS_INODELOCK_UPDATE,
2396 rec->ur_tgt, rec->ur_tgtlen,
2397 &child_lockh, &de_new, LCK_EX,
2398 MDS_INODELOCK_LOOKUP);
2405 LASSERT(de_srcdir->d_inode);
2408 if (de_new->d_inode) {
2409 /* name exists and points to local inode
2410 * try to unlink this name and create new one */
2411 CERROR("%s: %s points to local inode %lu/%lu\n",
2412 obd->obd_name, rec->ur_tgt,
2413 (unsigned long) de_new->d_inode->i_ino,
2414 (unsigned long) de_new->d_inode->i_generation);
2415 handle = fsfilt_start(obd, de_srcdir->d_inode,
2416 FSFILT_OP_RENAME, NULL);
2418 GOTO(cleanup, rc = PTR_ERR(handle));
2419 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de_new);
2422 } else if (de_new->d_flags & DCACHE_CROSS_REF) {
2423 /* name exists adn points to remove inode */
2424 CERROR("%s: %s points to remote inode %lu/%lu/%lu\n",
2425 obd->obd_name, rec->ur_tgt,
2426 (unsigned long) de_new->d_mdsnum,
2427 (unsigned long) de_new->d_inum,
2428 (unsigned long) de_new->d_generation);
2430 /* name doesn't exist. the simplest case */
2431 handle = fsfilt_start(obd, de_srcdir->d_inode,
2432 FSFILT_OP_LINK, NULL);
2434 GOTO(cleanup, rc = PTR_ERR(handle));
2438 rc = fsfilt_add_dir_entry(obd, de_srcdir, rec->ur_tgt,
2439 rec->ur_tgtlen - 1, rec->ur_fid1->id,
2440 rec->ur_fid1->generation, rec->ur_fid1->mds);
2442 CERROR("add_dir_entry() returned error %d\n", rc);
2445 rc = mds_finish_transno(mds, de_srcdir ? de_srcdir->d_inode : NULL,
2446 handle, req, rc, 0);
2447 switch(cleanup_phase) {
2451 if (parent_lockh[1].cookie != 0)
2452 ldlm_lock_decref(&parent_lockh[1], LCK_CW);
2454 ldlm_lock_decref(&parent_lockh[0], LCK_PW);
2455 if (child_lockh.cookie != 0)
2456 ldlm_lock_decref(&child_lockh, LCK_EX);
2464 req->rq_status = rc;
2469 static int mds_reint_rename_to_remote(struct mds_update_record *rec, int offset,
2470 struct ptlrpc_request *req)
2472 struct obd_device *obd = req->rq_export->exp_obd;
2473 struct ptlrpc_request *req2 = NULL;
2474 struct dentry *de_srcdir = NULL;
2475 struct dentry *de_old = NULL;
2476 struct mds_obd *mds = mds_req2mds(req);
2477 struct lustre_handle parent_lockh[2] = {{0}, {0}};
2478 struct lustre_handle child_lockh = {0};
2479 struct mdc_op_data opdata;
2480 void *handle = NULL;
2484 CDEBUG(D_OTHER, "%s: move name %s onto another mds%u\n",
2485 obd->obd_name, rec->ur_name, rec->ur_fid2->mds + 1);
2486 memset(&opdata, 0, sizeof(opdata));
2488 child_lockh.cookie = 0;
2489 rc = mds_get_parent_child_locked(obd, mds, rec->ur_fid1, parent_lockh,
2490 &de_srcdir,LCK_PW,MDS_INODELOCK_UPDATE,
2491 rec->ur_name, rec->ur_namelen,
2492 &child_lockh, &de_old, LCK_EX,
2493 MDS_INODELOCK_LOOKUP);
2496 LASSERT(de_srcdir->d_inode);
2499 /* we already know the target should be created on another MDS
2500 * so, we have to request that MDS to do it */
2502 /* prepare source fid */
2503 if (de_old->d_flags & DCACHE_CROSS_REF) {
2504 LASSERT(de_old->d_inode == NULL);
2505 CDEBUG(D_OTHER, "request to move remote name\n");
2506 opdata.fid1.mds = de_old->d_mdsnum;
2507 opdata.fid1.id = de_old->d_inum;
2508 opdata.fid1.generation = de_old->d_generation;
2509 } else if (de_old->d_inode == NULL) {
2510 /* oh, source doesn't exist */
2511 GOTO(cleanup, rc = -ENOENT);
2513 LASSERT(de_old->d_inode != NULL);
2514 CDEBUG(D_OTHER, "request to move local name\n");
2515 opdata.fid1.mds = mds->mds_num;
2516 opdata.fid1.id = de_old->d_inode->i_ino;
2517 opdata.fid1.generation = de_old->d_inode->i_generation;
2520 opdata.fid2 = *(rec->ur_fid2);
2521 rc = md_rename(mds->mds_lmv_exp, &opdata, NULL, 0, rec->ur_tgt,
2522 rec->ur_tgtlen - 1, &req2);
2527 handle = fsfilt_start(obd, de_srcdir->d_inode, FSFILT_OP_UNLINK, NULL);
2529 GOTO(cleanup, rc = PTR_ERR(handle));
2530 rc = fsfilt_del_dir_entry(obd, de_old);
2535 rc = mds_finish_transno(mds, de_srcdir ? de_srcdir->d_inode : NULL,
2536 handle, req, rc, 0);
2538 ptlrpc_req_finished(req2);
2541 if (parent_lockh[1].cookie != 0)
2542 ldlm_lock_decref(&parent_lockh[1], LCK_CW);
2544 ldlm_lock_decref(&parent_lockh[0], LCK_PW);
2545 if (child_lockh.cookie != 0)
2546 ldlm_lock_decref(&child_lockh, LCK_EX);
2551 req->rq_status = rc;
2556 static int mds_reint_rename(struct mds_update_record *rec, int offset,
2557 struct ptlrpc_request *req,
2558 struct lustre_handle *lockh)
2560 struct obd_device *obd = req->rq_export->exp_obd;
2561 struct dentry *de_srcdir = NULL;
2562 struct dentry *de_tgtdir = NULL;
2563 struct dentry *de_old = NULL;
2564 struct dentry *de_new = NULL;
2565 struct mds_obd *mds = mds_req2mds(req);
2566 struct lustre_handle dlm_handles[7] = {{0},{0},{0},{0},{0},{0},{0}};
2567 struct mds_body *body = NULL;
2568 int rc = 0, lock_count = 3;
2569 int cleanup_phase = 0;
2570 void *handle = NULL;
2573 LASSERT(offset == 0);
2575 DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u %s to "LPU64"/%u %s",
2576 rec->ur_fid1->id, rec->ur_fid1->generation, rec->ur_name,
2577 rec->ur_fid2->id, rec->ur_fid2->generation, rec->ur_tgt);
2579 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
2581 if (rec->ur_namelen == 1) {
2582 rc = mds_reint_rename_create_name(rec, offset, req);
2586 if (rec->ur_fid2->mds != mds->mds_num) {
2587 rc = mds_reint_rename_to_remote(rec, offset, req);
2591 rc = mds_get_parents_children_locked(obd, mds, rec->ur_fid1, &de_srcdir,
2592 rec->ur_fid2, &de_tgtdir, LCK_PW,
2593 rec->ur_name, rec->ur_namelen,
2594 &de_old, rec->ur_tgt,
2595 rec->ur_tgtlen, &de_new,
2596 dlm_handles, LCK_EX);
2600 cleanup_phase = 1; /* parent(s), children, locks */
2602 if (de_new->d_inode)
2605 /* sanity check for src inode */
2606 if (de_old->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
2607 de_old->d_inode->i_ino == de_tgtdir->d_inode->i_ino)
2608 GOTO(cleanup, rc = -EINVAL);
2610 /* sanity check for dest inode */
2611 if (de_new->d_inode &&
2612 (de_new->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
2613 de_new->d_inode->i_ino == de_tgtdir->d_inode->i_ino))
2614 GOTO(cleanup, rc = -EINVAL);
2616 if (de_old->d_inode == de_new->d_inode)
2617 GOTO(cleanup, rc = 0);
2619 /* if we are about to remove the target at first, pass the EA of
2620 * that inode to client to perform and cleanup on OST */
2621 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
2622 LASSERT(body != NULL);
2624 if (de_new->d_inode &&
2625 S_ISREG(de_new->d_inode->i_mode) &&
2626 de_new->d_inode->i_nlink == 1 &&
2627 mds_open_orphan_count(de_new->d_inode) == 0) {
2628 mds_pack_inode2fid(obd, &body->fid1, de_new->d_inode);
2629 mds_pack_inode2body(obd, body, de_new->d_inode);
2630 mds_pack_md(obd, req->rq_repmsg, 1, body, de_new->d_inode, 1);
2631 if (!(body->valid & OBD_MD_FLEASIZE)) {
2632 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
2633 OBD_MD_FLATIME | OBD_MD_FLMTIME);
2635 /* XXX need log unlink? */
2639 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
2640 de_srcdir->d_inode->i_sb);
2642 handle = fsfilt_start(obd, de_tgtdir->d_inode, FSFILT_OP_RENAME, NULL);
2644 GOTO(cleanup, rc = PTR_ERR(handle));
2646 /* FIXME need adjust the journal block count? */
2647 /* if the target should be moved to PENDING, we at first increase the
2648 * link and later vfs_rename() will decrease the link count again */
2649 if (de_new->d_inode &&
2650 S_ISREG(de_new->d_inode->i_mode) &&
2651 de_new->d_inode->i_nlink == 1 &&
2652 mds_open_orphan_count(de_new->d_inode) > 0) {
2653 rc = mds_add_link_orphan(rec, obd, de_new);
2659 de_old->d_fsdata = req;
2660 de_new->d_fsdata = req;
2661 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
2666 rc = mds_finish_transno(mds, de_tgtdir ? de_tgtdir->d_inode : NULL,
2667 handle, req, rc, 0);
2668 switch (cleanup_phase) {
2671 if (dlm_handles[5].cookie != 0)
2672 ldlm_lock_decref(&(dlm_handles[5]), LCK_CW);
2673 if (dlm_handles[6].cookie != 0)
2674 ldlm_lock_decref(&(dlm_handles[6]), LCK_CW);
2677 if (lock_count == 4)
2678 ldlm_lock_decref(&(dlm_handles[3]), LCK_EX);
2679 ldlm_lock_decref(&(dlm_handles[2]), LCK_EX);
2680 ldlm_lock_decref(&(dlm_handles[1]), LCK_PW);
2681 ldlm_lock_decref(&(dlm_handles[0]), LCK_PW);
2683 if (lock_count == 4)
2684 ptlrpc_save_lock(req,&(dlm_handles[3]), LCK_EX);
2685 ptlrpc_save_lock(req, &(dlm_handles[2]), LCK_EX);
2686 ptlrpc_save_lock(req, &(dlm_handles[1]), LCK_PW);
2687 ptlrpc_save_lock(req, &(dlm_handles[0]), LCK_PW);
2696 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2699 req->rq_status = rc;
2703 typedef int (*mds_reinter)(struct mds_update_record *, int offset,
2704 struct ptlrpc_request *, struct lustre_handle *);
2706 static mds_reinter reinters[REINT_MAX + 1] = {
2707 [REINT_SETATTR] mds_reint_setattr,
2708 [REINT_CREATE] mds_reint_create,
2709 [REINT_LINK] mds_reint_link,
2710 [REINT_UNLINK] mds_reint_unlink,
2711 [REINT_RENAME] mds_reint_rename,
2712 [REINT_OPEN] mds_open
2715 int mds_reint_rec(struct mds_update_record *rec, int offset,
2716 struct ptlrpc_request *req, struct lustre_handle *lockh)
2718 struct obd_device *obd = req->rq_export->exp_obd;
2719 struct lvfs_run_ctxt saved;
2722 /* checked by unpacker */
2723 LASSERT(rec->ur_opcode <= REINT_MAX &&
2724 reinters[rec->ur_opcode] != NULL);
2726 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
2727 rc = reinters[rec->ur_opcode] (rec, offset, req, lockh);
2728 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);