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/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"
47 struct mds_logcancel_data {
48 struct lov_mds_md *mlcd_lmm;
52 struct llog_cookie mlcd_cookies[0];
55 static void mds_cancel_cookies_cb(struct obd_device *obd,
56 __u64 transno, void *cb_data,
59 struct mds_logcancel_data *mlcd = cb_data;
60 struct lov_stripe_md *lsm = NULL;
61 struct llog_ctxt *ctxt;
64 obd_transno_commit_cb(obd, transno, error);
66 CDEBUG(D_HA, "cancelling %d cookies\n",
67 (int)(mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies)));
69 rc = obd_unpackmd(obd->u.mds.mds_lov_exp, &lsm, mlcd->mlcd_lmm,
70 mlcd->mlcd_eadatalen);
72 CERROR("bad LSM cancelling %d log cookies: rc %d\n",
73 (int)(mlcd->mlcd_cookielen/sizeof(*mlcd->mlcd_cookies)),
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);
83 CERROR("error cancelling %d log cookies: rc %d\n",
84 (int)(mlcd->mlcd_cookielen /
85 sizeof(*mlcd->mlcd_cookies)), rc);
88 OBD_FREE(mlcd, mlcd->mlcd_size);
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)
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;
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");
107 GOTO(out_commit, rc);
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));
126 transno = req->rq_reqmsg->transno;
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);
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);
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);
145 fsfilt_add_journal_cb(obd, mds->mds_sb, transno, handle,
146 mds_commit_last_transno_cb, NULL);
148 err = fsfilt_write_record(obd, mds->mds_rcvd_filp, mcd,
149 sizeof(*mcd), &off, 0);
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);
161 err = mds_update_last_fid(obd, handle, 0);
168 err = mds_lov_write_objids(obd);
174 CDEBUG(log_pri, "wrote objids: err = %d\n", err);
178 err = fsfilt_commit(obd, mds->mds_sb, inode, handle, 0);
180 CERROR("error committing transaction: %d\n", err);
188 /* this gives the same functionality as the code between
189 * sys_chmod and inode_setattr
190 * chown_common and inode_setattr
191 * utimes and inode_setattr
193 int mds_fix_attr(struct inode *inode, struct mds_update_record *rec)
195 time_t now = LTIME_S(CURRENT_TIME);
196 struct iattr *attr = &rec->ur_iattr;
197 unsigned int ia_valid = attr->ia_valid;
201 /* only fix up attrs if the client VFS didn't already */
202 if (!(ia_valid & ATTR_RAW))
205 if (!(ia_valid & ATTR_CTIME_SET))
206 LTIME_S(attr->ia_ctime) = now;
207 if (!(ia_valid & ATTR_ATIME_SET))
208 LTIME_S(attr->ia_atime) = now;
209 if (!(ia_valid & ATTR_MTIME_SET))
210 LTIME_S(attr->ia_mtime) = now;
212 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
216 if ((ia_valid & (ATTR_MTIME|ATTR_ATIME)) == (ATTR_MTIME|ATTR_ATIME)) {
217 if (rec->ur_fsuid != inode->i_uid &&
218 (error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
222 if (ia_valid & ATTR_SIZE) {
223 if ((error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
227 if (ia_valid & ATTR_UID) {
230 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
232 if (attr->ia_uid == (uid_t) -1)
233 attr->ia_uid = inode->i_uid;
234 if (attr->ia_gid == (gid_t) -1)
235 attr->ia_gid = inode->i_gid;
236 attr->ia_mode = inode->i_mode;
238 * If the user or group of a non-directory has been
239 * changed by a non-root user, remove the setuid bit.
240 * 19981026 David C Niemi <niemi@tux.org>
242 * Changed this to apply to all users, including root,
243 * to avoid some races. This is the behavior we had in
244 * 2.0. The check for non-root was definitely wrong
245 * for 2.2 anyway, as it should have been using
246 * CAP_FSETID rather than fsuid -- 19990830 SD.
248 if ((inode->i_mode & S_ISUID) == S_ISUID &&
249 !S_ISDIR(inode->i_mode)) {
250 attr->ia_mode &= ~S_ISUID;
251 attr->ia_valid |= ATTR_MODE;
254 * Likewise, if the user or group of a non-directory
255 * has been changed by a non-root user, remove the
256 * setgid bit UNLESS there is no group execute bit
257 * (this would be a file marked for mandatory
258 * locking). 19981026 David C Niemi <niemi@tux.org>
260 * Removed the fsuid check (see the comment above) --
263 if (((inode->i_mode & (S_ISGID | S_IXGRP)) ==
264 (S_ISGID | S_IXGRP)) && !S_ISDIR(inode->i_mode)) {
265 attr->ia_mode &= ~S_ISGID;
266 attr->ia_valid |= ATTR_MODE;
268 } else if (ia_valid & ATTR_MODE) {
269 int mode = attr->ia_mode;
271 if (attr->ia_mode == (mode_t) -1)
272 attr->ia_mode = inode->i_mode;
274 (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
279 void mds_steal_ack_locks(struct ptlrpc_request *req)
281 struct obd_export *exp = req->rq_export;
282 struct list_head *tmp;
283 struct ptlrpc_reply_state *oldrep;
284 struct ptlrpc_service *svc;
285 struct llog_create_locks *lcl;
287 char str[PTL_NALFMT_SIZE];
290 /* CAVEAT EMPTOR: spinlock order */
291 spin_lock_irqsave (&exp->exp_lock, flags);
292 list_for_each (tmp, &exp->exp_outstanding_replies) {
293 oldrep = list_entry(tmp, struct ptlrpc_reply_state,rs_exp_list);
295 if (oldrep->rs_xid != req->rq_xid)
298 if (oldrep->rs_msg.opc != req->rq_reqmsg->opc)
299 CERROR ("Resent req xid "LPX64" has mismatched opc: "
300 "new %d old %d\n", req->rq_xid,
301 req->rq_reqmsg->opc, oldrep->rs_msg.opc);
303 svc = oldrep->rs_srv_ni->sni_service;
304 spin_lock (&svc->srv_lock);
306 list_del_init (&oldrep->rs_exp_list);
308 CWARN("Stealing %d locks from rs %p x"LPD64".t"LPD64
310 oldrep->rs_nlocks, oldrep,
311 oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_msg.opc,
312 ptlrpc_peernid2str(&exp->exp_connection->c_peer, str));
314 for (i = 0; i < oldrep->rs_nlocks; i++)
315 ptlrpc_save_lock(req,
316 &oldrep->rs_locks[i],
317 oldrep->rs_modes[i]);
318 oldrep->rs_nlocks = 0;
320 lcl = oldrep->rs_llog_locks;
321 oldrep->rs_llog_locks = NULL;
323 ptlrpc_save_llog_lock(req, lcl);
325 DEBUG_REQ(D_HA, req, "stole locks for");
326 ptlrpc_schedule_difficult_reply (oldrep);
328 spin_unlock (&svc->srv_lock);
329 spin_unlock_irqrestore (&exp->exp_lock, flags);
332 spin_unlock_irqrestore (&exp->exp_lock, flags);
335 void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd)
337 DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
338 mcd->mcd_last_transno, mcd->mcd_last_result);
339 req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_transno;
340 req->rq_repmsg->status = req->rq_status = mcd->mcd_last_result;
342 mds_steal_ack_locks(req);
345 static void reconstruct_reint_setattr(struct mds_update_record *rec,
346 int offset, struct ptlrpc_request *req)
348 struct mds_export_data *med = &req->rq_export->exp_mds_data;
349 struct mds_body *body;
352 mds_req_from_mcd(req, med->med_mcd);
354 de = mds_id2dentry(req2obd(req), rec->ur_id1, NULL);
356 LASSERT(PTR_ERR(de) == req->rq_status);
360 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
361 mds_pack_inode2body(req2obd(req), body, de->d_inode, 0);
363 /* Don't return OST-specific attributes if we didn't just set them */
364 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
365 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
366 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
367 body->valid |= OBD_MD_FLMTIME;
368 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
369 body->valid |= OBD_MD_FLATIME;
374 /* In the raw-setattr case, we lock the child inode.
375 * In the write-back case or if being called from open, the client holds a lock
378 * We use the ATTR_FROM_OPEN flag to tell these cases apart. */
379 static int mds_reint_setattr(struct mds_update_record *rec, int offset,
380 struct ptlrpc_request *req, struct lustre_handle *lh)
382 struct mds_obd *mds = mds_req2mds(req);
383 struct obd_device *obd = req->rq_export->exp_obd;
384 struct mds_body *body;
386 struct inode *inode = NULL;
387 struct lustre_handle lockh[2] = {{0}, {0}};
390 struct mds_logcancel_data *mlcd = NULL;
391 int rc = 0, cleanup_phase = 0, err;
395 LASSERT(offset == 1);
397 DEBUG_REQ(D_INODE, req, "setattr "LPU64"/%u %x",
398 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
399 rec->ur_iattr.ia_valid);
401 MDS_CHECK_RESENT(req, reconstruct_reint_setattr(rec, offset, req));
403 MDS_UPDATE_COUNTER(mds, MDS_SETATTR_COUNT);
405 if (rec->ur_iattr.ia_valid & ATTR_FROM_OPEN) {
406 de = mds_id2dentry(obd, rec->ur_id1, NULL);
408 GOTO(cleanup, rc = PTR_ERR(de));
410 __u64 lockpart = MDS_INODELOCK_UPDATE;
411 if (rec->ur_iattr.ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID))
412 lockpart |= MDS_INODELOCK_LOOKUP;
413 de = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW,
414 lockh, &parent_mode, NULL, 0, lockpart);
416 GOTO(cleanup, rc = PTR_ERR(de));
424 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
425 rec->ur_eadata != NULL)
428 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb);
430 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
432 GOTO(cleanup, rc = PTR_ERR(handle));
434 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
435 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n",
436 LTIME_S(rec->ur_iattr.ia_mtime),
437 LTIME_S(rec->ur_iattr.ia_ctime));
438 rc = mds_fix_attr(inode, rec);
442 if (rec->ur_iattr.ia_valid & ATTR_ATTR_FLAG) /* ioctl */
443 rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_SETFLAGS,
444 (long)&rec->ur_iattr.ia_attr_flags);
446 rc = fsfilt_setattr(obd, de, handle, &rec->ur_iattr, 0);
448 if (rc == 0 && (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
449 rec->ur_eadata != NULL) {
450 struct lov_stripe_md *lsm = NULL;
452 rc = ll_permission(inode, MAY_WRITE, NULL);
456 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE, mds->mds_lov_exp,
457 0, &lsm, rec->ur_eadata);
461 obd_free_memmd(mds->mds_lov_exp, &lsm);
463 rc = fsfilt_set_md(obd, inode, handle, rec->ur_eadata,
469 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
470 mds_pack_inode2body(obd, body, inode, 0);
471 body->id1 = *rec->ur_id1;
473 /* Don't return OST-specific attributes if we didn't just set them */
474 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
475 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
476 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
477 body->valid |= OBD_MD_FLMTIME;
478 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
479 body->valid |= OBD_MD_FLATIME;
481 if (rc == 0 && rec->ur_cookielen && !IS_ERR(mds->mds_lov_obd)) {
482 OBD_ALLOC(mlcd, sizeof(*mlcd) + rec->ur_cookielen +
485 mlcd->mlcd_size = sizeof(*mlcd) + rec->ur_cookielen +
487 mlcd->mlcd_eadatalen = rec->ur_eadatalen;
488 mlcd->mlcd_cookielen = rec->ur_cookielen;
489 mlcd->mlcd_lmm = (void *)&mlcd->mlcd_cookies +
490 mlcd->mlcd_cookielen;
491 memcpy(&mlcd->mlcd_cookies, rec->ur_logcookies,
492 mlcd->mlcd_cookielen);
493 memcpy(mlcd->mlcd_lmm, rec->ur_eadata,
494 mlcd->mlcd_eadatalen);
496 CERROR("unable to allocate log cancel data\n");
502 fsfilt_add_journal_cb(req->rq_export->exp_obd, mds->mds_sb, 0,
503 handle, mds_cancel_cookies_cb, mlcd);
504 err = mds_finish_transno(mds, inode, handle, req, rc, 0);
505 switch (cleanup_phase) {
507 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
508 rec->ur_eadata != NULL)
513 if (lockh[1].cookie != 0)
514 ldlm_lock_decref(lockh + 1, parent_mode);
517 ldlm_lock_decref(lockh, LCK_PW);
519 ptlrpc_save_lock (req, lockh, LCK_PW);
534 static void reconstruct_reint_create(struct mds_update_record *rec, int offset,
535 struct ptlrpc_request *req)
537 struct mds_export_data *med = &req->rq_export->exp_mds_data;
538 struct dentry *parent, *child;
539 struct mds_body *body;
542 mds_req_from_mcd(req, med->med_mcd);
544 if (req->rq_status) {
549 parent = mds_id2dentry(req2obd(req), rec->ur_id1, NULL);
550 LASSERT(!IS_ERR(parent));
551 child = ll_lookup_one_len(rec->ur_name, parent,
552 rec->ur_namelen - 1);
553 LASSERT(!IS_ERR(child));
554 if ((child->d_flags & DCACHE_CROSS_REF)) {
555 LASSERTF(child->d_inode == NULL, "BUG 3869\n");
556 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
557 mds_pack_dentry2body(req2obd(req), body, child, 1);
558 } else if (child->d_inode == NULL) {
559 DEBUG_REQ(D_ERROR, req, "parent "DLID4" name %s mode %o",
560 OLID4(rec->ur_id1), rec->ur_name, rec->ur_mode);
561 LASSERTF(child->d_inode != NULL, "BUG 3869\n");
563 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
564 mds_pack_inode2body(req2obd(req), body, child->d_inode, 1);
571 static int mds_reint_create(struct mds_update_record *rec, int offset,
572 struct ptlrpc_request *req,
573 struct lustre_handle *lh)
575 struct dentry *dparent = NULL;
576 struct mds_obd *mds = mds_req2mds(req);
577 struct obd_device *obd = req->rq_export->exp_obd;
578 struct dentry *dchild = NULL;
579 struct inode *dir = NULL;
581 struct lustre_handle lockh[2] = {{0}, {0}};
583 int rc = 0, err, type = rec->ur_mode & S_IFMT, cleanup_phase = 0;
585 struct dentry_params dp;
586 struct mea *mea = NULL;
590 LASSERT(offset == 1);
592 LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name,
595 DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u name %s mode %o",
596 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
597 rec->ur_name, rec->ur_mode);
599 MDS_CHECK_RESENT(req, reconstruct_reint_create(rec, offset, req));
601 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
602 GOTO(cleanup, rc = -ESTALE);
604 dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW,
605 lockh, &parent_mode, rec->ur_name,
606 rec->ur_namelen - 1, MDS_INODELOCK_UPDATE);
607 if (IS_ERR(dparent)) {
608 rc = PTR_ERR(dparent);
609 CERROR("parent lookup error %d\n", rc);
612 cleanup_phase = 1; /* locked parent dentry */
613 dir = dparent->d_inode;
616 ldlm_lock_dump_handle(D_OTHER, lockh);
618 /* try to retrieve MEA data for this dir */
619 rc = mds_get_lmv_attr(obd, dparent->d_inode, &mea, &mea_size);
625 * dir is already splitted, check is requested filename should
626 * live at this MDS or at another one.
628 int i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
629 if (mea->mea_master != id_group(&mea->mea_ids[i])) {
630 CDEBUG(D_OTHER, "inapropriate MDS(%d) for %lu/%u:%s."
631 " should be %lu(%d)\n",
632 mea->mea_master, dparent->d_inode->i_ino,
633 dparent->d_inode->i_generation, rec->ur_name,
634 (unsigned long)id_group(&mea->mea_ids[i]), i);
635 GOTO(cleanup, rc = -ERESTART);
639 dchild = ll_lookup_one_len(rec->ur_name, dparent,
640 rec->ur_namelen - 1);
641 if (IS_ERR(dchild)) {
642 rc = PTR_ERR(dchild);
643 CERROR("Can't find "DLID4"/%s, error %d\n",
644 OLID4(rec->ur_id1), rec->ur_name, rc);
648 cleanup_phase = 2; /* child dentry */
650 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb);
652 if (type == S_IFREG || type == S_IFDIR) {
653 rc = mds_try_to_split_dir(obd, dparent, &mea, 0, parent_mode);
654 CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d/%d\n",
655 obd->obd_name, dparent->d_inode->i_ino,
656 dparent->d_inode->i_generation, rc, parent_mode);
658 /* dir got splitted */
659 GOTO(cleanup, rc = -ERESTART);
661 /* error happened during spitting. */
666 if (dir->i_mode & S_ISGID) {
667 if (S_ISDIR(rec->ur_mode))
668 rec->ur_mode |= S_ISGID;
672 * here inode number should be used only in the case of replaying. It is
673 * needed to check if object already created in the case of creating
676 dchild->d_fsdata = (void *)&dp;
677 dp.p_inum = (unsigned long)id_ino(rec->ur_id2);
682 handle = fsfilt_start(obd, dir, FSFILT_OP_CREATE, NULL);
684 GOTO(cleanup, rc = PTR_ERR(handle));
685 rc = ll_vfs_create(dir, dchild, rec->ur_mode, NULL);
691 struct lustre_id sid;
694 * as Peter asked, mkdir() should distribute new directories
695 * over the whole cluster in order to distribute namespace
696 * processing load. first, we calculate which MDS to use to put
697 * new directory's inode in.
699 i = mds_choose_mdsnum(obd, rec->ur_name, rec->ur_namelen - 1,
701 if (i == mds->mds_num) {
702 /* inode will be created locally */
703 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
705 GOTO(cleanup, rc = PTR_ERR(handle));
707 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
709 CERROR("Can't create dir %s, rc = %d\n",
710 dchild->d_name.name, rc);
714 down(&dchild->d_inode->i_sem);
716 rc = mds_update_inode_sid(obd, dchild->d_inode,
717 handle, rec->ur_id2);
719 CERROR("mds_update_inode_sid() failed, inode %lu, "
720 "rc %d\n", dchild->d_inode->i_ino, rc);
724 * make sure, that fid is up-to-date.
726 mds_set_last_fid(obd, id_fid(rec->ur_id2));
728 rc = mds_alloc_inode_sid(obd, dchild->d_inode,
731 CERROR("mds_alloc_inode_sid() failed, inode %lu, "
732 "rc %d\n", dchild->d_inode->i_ino, rc);
735 up(&dchild->d_inode->i_sem);
741 nstripes = *(u16 *)rec->ur_eadata;
743 if (rc == 0 && nstripes) {
745 * we pass LCK_EX to split routine to signal,
746 * that we have exclusive access to the
747 * directory. Simple because nobody knows it
748 * already exists -bzzz
750 rc = mds_try_to_split_dir(obd, dchild,
754 /* dir got splitted */
757 /* an error occured during
762 } else if (!DENTRY_VALID(dchild)) {
763 /* inode will be created on another MDS */
764 struct obdo *oa = NULL;
765 struct mds_body *body;
767 /* first, create that inode */
770 GOTO(cleanup, rc = -ENOMEM);
775 if (rec->ur_eadata) {
776 /* user asks for creating splitted dir */
777 oa->o_easize = *((u16 *) rec->ur_eadata);
780 obdo_from_inode(oa, dir, OBD_MD_FLTYPE | OBD_MD_FLATIME |
781 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
782 OBD_MD_FLUID | OBD_MD_FLGID);
784 oa->o_mode = dir->i_mode;
786 CDEBUG(D_OTHER, "%s: create dir on MDS %u\n",
789 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
791 * here inode number and generation are
792 * important, as this is replay request and we
793 * need them to check if such an object is
796 CDEBUG(D_HA, "%s: replay dir creation %*s -> %u/%u\n",
797 obd->obd_name, rec->ur_namelen - 1,
798 rec->ur_name, (unsigned)id_ino(rec->ur_id2),
799 (unsigned)id_gen(rec->ur_id2));
800 oa->o_id = id_ino(rec->ur_id2);
801 oa->o_fid = id_fid(rec->ur_id2);
802 oa->o_generation = id_gen(rec->ur_id2);
803 oa->o_flags |= OBD_FL_RECREATE_OBJS;
806 /* before obd_create() is called, o_fid is not known. */
807 rc = obd_create(mds->mds_lmv_exp, oa, NULL, NULL);
809 CERROR("can't create remote inode: %d\n", rc);
810 DEBUG_REQ(D_ERROR, req, "parent "LPU64"/%u name %s mode %o",
811 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
812 rec->ur_name, rec->ur_mode);
817 /* now, add new dir entry for it */
818 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
819 if (IS_ERR(handle)) {
821 GOTO(cleanup, rc = PTR_ERR(handle));
824 /* creating local dentry for remote inode. */
825 rc = fsfilt_add_dir_entry(obd, dparent, rec->ur_name,
826 rec->ur_namelen - 1, oa->o_id,
827 oa->o_generation, i, oa->o_fid);
830 CERROR("Can't create local entry %*s for "
831 "remote inode.\n", rec->ur_namelen - 1,
837 body = lustre_msg_buf(req->rq_repmsg,
839 body->valid |= OBD_MD_FLID | OBD_MD_MDS |
842 obdo2id(&body->id1, oa);
845 /* requested name exists in the directory */
852 handle = fsfilt_start(obd, dir, FSFILT_OP_SYMLINK, NULL);
854 GOTO(cleanup, rc = PTR_ERR(handle));
855 if (rec->ur_tgt == NULL) /* no target supplied */
856 rc = -EINVAL; /* -EPROTO? */
858 rc = ll_vfs_symlink(dir, dchild, rec->ur_tgt, S_IALLUGO);
866 int rdev = rec->ur_rdev;
867 handle = fsfilt_start(obd, dir, FSFILT_OP_MKNOD, NULL);
869 GOTO(cleanup, (handle = NULL, rc = PTR_ERR(handle)));
870 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
875 CERROR("bad file type %o creating %s\n", type, rec->ur_name);
876 dchild->d_fsdata = NULL;
877 GOTO(cleanup, rc = -EINVAL);
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;
885 CDEBUG(D_INODE, "error during create: %d\n", rc);
887 } else if (dchild->d_inode) {
889 struct mds_body *body;
890 struct inode *inode = dchild->d_inode;
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;
898 if (dir->i_mode & S_ISGID)
899 iattr.ia_gid = dir->i_gid;
901 iattr.ia_gid = rec->ur_fsgid;
903 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
904 ATTR_MTIME | ATTR_CTIME;
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);
910 if (type != S_IFDIR) {
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.
917 rc = mds_update_inode_sid(obd, inode,
918 handle, rec->ur_id2);
921 CERROR("Can't update inode self id, "
926 * make sure, that fid is up-to-date.
928 mds_set_last_fid(obd, id_fid(rec->ur_id2));
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);
935 struct lustre_handle child_ino_lockh;
937 CDEBUG(D_INODE, "created ino %lu with gen %x\n",
938 inode->i_ino, inode->i_generation);
940 if (type != S_IFDIR) {
941 struct lustre_id sid;
944 * allocate new id for @inode if it is not dir,
945 * because for dir it was already done.
948 rc = mds_alloc_inode_sid(obd, inode,
952 CERROR("mds_alloc_inode_sid() failed, "
953 "inode %lu, rc %d\n", inode->i_ino,
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.
968 rc = mds_lock_new_child(obd, inode, &child_ino_lockh);
969 if (rc != ELDLM_OK) {
970 CERROR("error locking for unlink/create sync: "
973 ldlm_lock_decref(&child_ino_lockh, LCK_EX);
978 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
980 CERROR("error on child setattr: rc = %d\n", rc);
982 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
983 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
985 CERROR("error on parent setattr: rc = %d\n", rc);
987 MDS_UPDATE_COUNTER(mds, MDS_CREATE_COUNT);
989 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
990 mds_pack_inode2body(obd, body, inode, 1);
995 err = mds_finish_transno(mds, dir, handle, req, rc, 0);
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
1004 err = vfs_rmdir(dir, dchild);
1006 CERROR("rmdir in error path: %d\n", err);
1009 err = vfs_unlink(dir, dchild);
1011 CERROR("unlink in error path: %d\n", err);
1017 switch (cleanup_phase) {
1018 case 2: /* child dentry */
1020 case 1: /* locked parent dentry */
1022 if (lockh[1].cookie != 0)
1023 ldlm_lock_decref(lockh + 1, parent_mode);
1026 ldlm_lock_decref(lockh, LCK_PW);
1028 ptlrpc_save_lock(req, lockh, LCK_PW);
1034 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1038 OBD_FREE(mea, mea_size);
1039 req->rq_status = rc;
1044 res_gt(struct ldlm_res_id *res1, struct ldlm_res_id *res2,
1045 ldlm_policy_data_t *p1, ldlm_policy_data_t *p2)
1049 for (i = 0; i < RES_NAME_SIZE; i++) {
1051 * this is needed to make zeroed res_id entries to be put at the
1052 * end of list in *ordered_locks() .
1054 if (res1->name[i] == 0 && res2->name[i] != 0)
1056 if (res2->name[i] == 0 && res1->name[i] != 0)
1058 if (res1->name[i] > res2->name[i])
1060 if (res1->name[i] < res2->name[i])
1067 if (memcmp(p1, p2, sizeof(*p1)) < 0)
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.
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)
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 };
1093 LASSERT(p1_res_id != NULL && p2_res_id != NULL);
1095 CDEBUG(D_INFO, "locks before: "LPU64"/"LPU64"\n",
1096 res_id[0]->name[0], res_id[1]->name[0]);
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;
1109 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"\n",
1110 res_id[0]->name[0], res_id[1]->name[0]);
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]);
1119 ldlm_lock_dump_handle(D_OTHER, handles[0]);
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,
1132 if (rc != ELDLM_OK) {
1133 ldlm_lock_decref(handles[0], lock_modes[0]);
1136 ldlm_lock_dump_handle(D_OTHER, handles[1]);
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)
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;
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]);
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.
1174 for (i = 1; i < 4; i++) {
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];
1183 if (res_gt(res_id[j], res_id[4], policies[j],
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];
1193 } while (j >= 0 && !sorted);
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];
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]);
1205 /* XXX we could send ASTs on all these locks first before blocking? */
1206 for (i = 0; i < 4; i++) {
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
1217 if (res_id[i]->name[0] == 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]);
1228 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1229 *res_id[i], LDLM_IBITS,
1231 lock_modes[i], &flags,
1233 ldlm_completion_ast, NULL, NULL,
1234 NULL, 0, NULL, dlm_handles[i]);
1236 GOTO(out_err, rc = -EIO);
1237 ldlm_lock_dump_handle(D_OTHER, dlm_handles[i]);
1244 ldlm_lock_decref(dlm_handles[i], lock_modes[i]);
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)
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,
1274 struct lustre_id sid;
1275 struct dentry *vchild, *dchild = *dchildp;
1276 int rc = 0, cleanup_phase = 2; /* parent, child locks */
1279 vchild = ll_lookup_one_len(name, dparent, namelen - 1);
1281 GOTO(cleanup, rc = PTR_ERR(vchild));
1283 if ((vchild->d_flags & DCACHE_CROSS_REF)) {
1284 if (child_gen == vchild->d_generation &&
1285 child_ino == vchild->d_inum) {
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))) {
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]);
1310 if (child_res_id->name[0] != 0)
1311 ldlm_lock_decref(child_lockh, child_mode);
1315 cleanup_phase = 1; /* parent lock only */
1316 *dchildp = dchild = vchild;
1318 if (dchild->d_inode || (dchild->d_flags & DCACHE_CROSS_REF)) {
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);
1326 CERROR("Can't read inode self id, inode %lu,"
1327 " rc %d\n", dchild->d_inode->i_ino, rc);
1330 child_res_id->name[0] = id_fid(&sid);
1331 child_res_id->name[1] = id_group(&sid);
1333 child_res_id->name[0] = dchild->d_fid;
1334 child_res_id->name[1] = dchild->d_mdsnum;
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],
1342 GOTO(cleanup, rc = 1);
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,
1351 GOTO(cleanup, rc = -EIO);
1354 memset(child_res_id, 0, sizeof(*child_res_id));
1360 switch(cleanup_phase) {
1362 if (child_res_id->name[0] != 0)
1363 ldlm_lock_decref(child_lockh, child_mode);
1365 ldlm_lock_decref(parent_lockh, parent_mode);
1371 int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds,
1372 struct lustre_id *id,
1373 struct lustre_handle *parent_lockh,
1374 struct dentry **dparentp, int parent_mode,
1375 __u64 parent_lockpart, int *update_mode,
1376 char *name, int namelen,
1377 struct lustre_handle *child_lockh,
1378 struct dentry **dchildp, int child_mode,
1379 __u64 child_lockpart)
1381 ldlm_policy_data_t parent_policy = {.l_inodebits = { parent_lockpart }};
1382 ldlm_policy_data_t child_policy = {.l_inodebits = { child_lockpart }};
1383 struct ldlm_res_id parent_res_id = { .name = {0} };
1384 struct ldlm_res_id child_res_id = { .name = {0} };
1385 int rc = 0, cleanup_phase = 0;
1386 unsigned long child_ino;
1387 struct lustre_id sid;
1388 __u32 child_gen = 0;
1389 struct inode *inode;
1392 /* Step 1: Lookup parent */
1393 *dparentp = mds_id2dentry(obd, id, NULL);
1394 if (IS_ERR(*dparentp)) {
1395 rc = PTR_ERR(*dparentp);
1400 CDEBUG(D_INODE, "parent ino %lu, name %s\n",
1401 (*dparentp)->d_inode->i_ino, name);
1403 parent_res_id.name[0] = id_fid(id);
1404 parent_res_id.name[1] = id_group(id);
1407 parent_lockh[1].cookie = 0;
1408 if (name && IS_PDIROPS((*dparentp)->d_inode)) {
1409 struct ldlm_res_id res_id = { .name = {0} };
1410 ldlm_policy_data_t policy;
1413 *update_mode = mds_lock_mode_for_dir(obd, *dparentp, parent_mode);
1415 res_id.name[0] = id_fid(id);
1416 res_id.name[1] = id_group(id);
1417 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1419 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1420 res_id, LDLM_IBITS, &policy,
1421 *update_mode, &flags,
1423 ldlm_completion_ast,
1424 NULL, NULL, NULL, 0, NULL,
1430 parent_res_id.name[2] = full_name_hash(name, namelen - 1);
1432 CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n",
1433 (unsigned long)id_fid(id), (unsigned long)id_group(id),
1434 parent_res_id.name[2]);
1438 cleanup_phase = 1; /* parent dentry */
1440 /* Step 2: Lookup child (without DLM lock, to get resource name) */
1441 *dchildp = ll_lookup_one_len(name, *dparentp, namelen - 1);
1442 if (IS_ERR(*dchildp)) {
1443 rc = PTR_ERR(*dchildp);
1444 CDEBUG(D_INODE, "child lookup error %d\n", rc);
1448 if ((*dchildp)->d_flags & DCACHE_CROSS_REF) {
1450 * inode lives on another MDS: return * fid/mdsnum and LOOKUP
1451 * lock. Drop possible UPDATE lock!
1453 child_policy.l_inodebits.bits &= ~MDS_INODELOCK_UPDATE;
1454 child_policy.l_inodebits.bits |= MDS_INODELOCK_LOOKUP;
1456 child_res_id.name[0] = (*dchildp)->d_fid;
1457 child_res_id.name[1] = (*dchildp)->d_mdsnum;
1458 child_gen = (*dchildp)->d_generation;
1459 child_ino = (*dchildp)->d_inum;
1463 inode = (*dchildp)->d_inode;
1465 inode = igrab(inode);
1469 down(&inode->i_sem);
1470 rc = mds_read_inode_sid(obd, inode, &sid);
1473 CERROR("Can't read inode self id, inode %lu, "
1474 "rc %d\n", inode->i_ino, rc);
1479 child_res_id.name[0] = id_fid(&sid);
1480 child_res_id.name[1] = id_group(&sid);
1481 child_gen = inode->i_generation;
1482 child_ino = inode->i_ino;
1486 cleanup_phase = 2; /* child dentry */
1488 /* Step 3: Lock parent and child in resource order. If child doesn't
1489 * exist, we still have to lock the parent and re-lookup. */
1490 rc = enqueue_ordered_locks(obd, &parent_res_id, parent_lockh, parent_mode,
1491 &parent_policy, &child_res_id, child_lockh,
1492 child_mode, &child_policy);
1496 if ((*dchildp)->d_inode || ((*dchildp)->d_flags & DCACHE_CROSS_REF))
1497 cleanup_phase = 4; /* child lock */
1499 cleanup_phase = 3; /* parent lock */
1501 /* Step 4: Re-lookup child to verify it hasn't changed since locking */
1502 rc = mds_verify_child(obd, &parent_res_id, parent_lockh, *dparentp,
1503 parent_mode, &child_res_id, child_lockh,
1504 dchildp, child_mode, &child_policy,
1505 name, namelen, &parent_res_id,
1506 child_ino, child_gen);
1517 switch (cleanup_phase) {
1519 ldlm_lock_decref(child_lockh, child_mode);
1521 ldlm_lock_decref(parent_lockh, parent_mode);
1526 if (parent_lockh[1].cookie)
1527 ldlm_lock_decref(parent_lockh + 1, *update_mode);
1535 void mds_reconstruct_generic(struct ptlrpc_request *req)
1537 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1538 mds_req_from_mcd(req, med->med_mcd);
1541 /* If we are unlinking an open file/dir (i.e. creating an orphan) then
1542 * we instead link the inode into the PENDING directory until it is
1543 * finally released. We can't simply call mds_reint_rename() or some
1544 * part thereof, because we don't have the inode to check for link
1545 * count/open status until after it is locked.
1547 * For lock ordering, caller must get child->i_sem first, then pending->i_sem
1548 * before starting journal transaction.
1550 * returns 1 on success
1551 * returns 0 if we lost a race and didn't make a new link
1552 * returns negative on error
1554 static int mds_orphan_add_link(struct mds_update_record *rec,
1555 struct obd_device *obd, struct dentry *dentry)
1557 struct mds_obd *mds = &obd->u.mds;
1558 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1559 struct inode *inode = dentry->d_inode;
1560 struct dentry *pending_child;
1561 char idname[LL_ID_NAMELEN];
1562 int idlen = 0, rc, mode;
1565 LASSERT(inode != NULL);
1566 LASSERT(!mds_inode_is_orphan(inode));
1567 #ifndef HAVE_I_ALLOC_SEM
1568 LASSERT(down_trylock(&inode->i_sem) != 0);
1570 LASSERT(down_trylock(&pending_dir->i_sem) != 0);
1572 idlen = ll_id2str(idname, inode->i_ino, inode->i_generation);
1574 CDEBUG(D_INODE, "pending destroy of %dx open %d linked %s %s = %s\n",
1575 mds_orphan_open_count(inode), inode->i_nlink,
1576 S_ISDIR(inode->i_mode) ? "dir" :
1577 S_ISREG(inode->i_mode) ? "file" : "other",
1578 rec->ur_name, idname);
1580 if (mds_orphan_open_count(inode) == 0 || inode->i_nlink != 0)
1583 pending_child = lookup_one_len(idname, mds->mds_pending_dir, idlen);
1584 if (IS_ERR(pending_child))
1585 RETURN(PTR_ERR(pending_child));
1587 if (pending_child->d_inode != NULL) {
1588 CERROR("re-destroying orphan file %s?\n", rec->ur_name);
1589 LASSERT(pending_child->d_inode == inode);
1590 GOTO(out_dput, rc = 0);
1593 /* link() is semanticaly-wrong for S_IFDIR, so we set S_IFREG
1594 * for linking and return real mode back then -bzzz */
1595 mode = inode->i_mode;
1596 inode->i_mode = S_IFREG;
1597 rc = vfs_link(dentry, pending_dir, pending_child);
1599 CERROR("error linking orphan %s to PENDING: rc = %d\n",
1602 mds_inode_set_orphan(inode);
1604 /* return mode and correct i_nlink if inode is directory */
1605 inode->i_mode = mode;
1606 LASSERTF(inode->i_nlink == 1, "%s nlink == %d\n",
1607 S_ISDIR(mode) ? "dir" : S_ISREG(mode) ? "file" : "other",
1609 if (S_ISDIR(mode)) {
1611 pending_dir->i_nlink++;
1612 mark_inode_dirty(inode);
1613 mark_inode_dirty(pending_dir);
1618 l_dput(pending_child);
1622 int mds_create_local_dentry(struct mds_update_record *rec,
1623 struct obd_device *obd)
1625 struct mds_obd *mds = &obd->u.mds;
1626 struct inode *id_dir = mds->mds_id_dir->d_inode;
1627 int idlen = 0, rc, cleanup_phase = 0;
1628 struct dentry *new_child = NULL;
1629 char *idname = rec->ur_name;
1630 struct dentry *child = NULL;
1631 struct lustre_handle lockh[2] = {{0}, {0}};
1632 struct lustre_id sid;
1636 down(&id_dir->i_sem);
1637 idlen = ll_id2str(idname, id_ino(rec->ur_id1),
1638 id_gen(rec->ur_id1));
1640 CDEBUG(D_OTHER, "look for local dentry '%s' for "DLID4"\n",
1641 idname, OLID4(rec->ur_id1));
1643 new_child = ll_lookup_one_len(idname, mds->mds_id_dir,
1646 if (IS_ERR(new_child)) {
1647 CERROR("can't lookup %s: %d\n", idname,
1648 (int) PTR_ERR(new_child));
1649 GOTO(cleanup, rc = PTR_ERR(new_child));
1653 down(&id_dir->i_sem);
1654 rc = mds_read_inode_sid(obd, id_dir, &sid);
1657 CERROR("Can't read inode self id, inode %lu, "
1658 "rc %d\n", id_dir->i_ino, rc);
1662 if (new_child->d_inode != NULL) {
1663 /* nice. we've already have local dentry! */
1664 CDEBUG(D_OTHER, "found dentry in FIDS/: %u/%u\n",
1665 (unsigned)new_child->d_inode->i_ino,
1666 (unsigned)new_child->d_inode->i_generation);
1668 id_ino(rec->ur_id1) = id_dir->i_ino;
1669 id_gen(rec->ur_id1) = id_dir->i_generation;
1670 rec->ur_namelen = idlen + 1;
1672 id_fid(rec->ur_id1) = id_fid(&sid);
1673 id_group(rec->ur_id1) = id_group(&sid);
1675 GOTO(cleanup, rc = 0);
1678 /* new, local dentry will be added soon. we need no aliases here */
1681 if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
1682 child = mds_id2dentry(obd, rec->ur_id1, NULL);
1684 child = mds_id2locked_dentry(obd, rec->ur_id1, NULL,
1685 LCK_EX, lockh, NULL, NULL, 0,
1686 MDS_INODELOCK_UPDATE);
1689 if (IS_ERR(child)) {
1690 rc = PTR_ERR(child);
1691 if (rc != -ENOENT || !(rec->ur_mode & MDS_MODE_REPLAY))
1692 CERROR("can't get victim: %d\n", rc);
1697 handle = fsfilt_start(obd, id_dir, FSFILT_OP_LINK, NULL);
1699 GOTO(cleanup, rc = PTR_ERR(handle));
1701 rc = fsfilt_add_dir_entry(obd, mds->mds_id_dir, idname,
1702 idlen, id_ino(rec->ur_id1),
1703 id_gen(rec->ur_id1), mds->mds_num,
1704 id_fid(rec->ur_id1));
1706 CERROR("error linking orphan %lu/%lu to FIDS: rc = %d\n",
1707 (unsigned long)child->d_inode->i_ino,
1708 (unsigned long)child->d_inode->i_generation, rc);
1710 if (S_ISDIR(child->d_inode->i_mode)) {
1712 mark_inode_dirty(id_dir);
1714 mark_inode_dirty(child->d_inode);
1716 fsfilt_commit(obd, mds->mds_sb, id_dir, handle, 0);
1718 id_ino(rec->ur_id1) = id_dir->i_ino;
1719 id_gen(rec->ur_id1) = id_dir->i_generation;
1720 rec->ur_namelen = idlen + 1;
1722 id_fid(rec->ur_id1) = id_fid(&sid);
1723 id_group(rec->ur_id1) = id_group(&sid);
1727 switch(cleanup_phase) {
1729 if (!(rec->ur_mode & MDS_MODE_DONT_LOCK))
1730 ldlm_lock_decref(lockh, LCK_EX);
1740 static int mds_copy_unlink_reply(struct ptlrpc_request *master,
1741 struct ptlrpc_request *slave)
1743 void *cookie, *cookie2;
1744 struct mds_body *body2;
1745 struct mds_body *body;
1749 body = lustre_msg_buf(slave->rq_repmsg, 0, sizeof(*body));
1750 LASSERT(body != NULL);
1752 body2 = lustre_msg_buf(master->rq_repmsg, 0, sizeof (*body));
1753 LASSERT(body2 != NULL);
1755 if (!(body->valid & (OBD_MD_FLID | OBD_MD_FLGENER)))
1758 memcpy(body2, body, sizeof(*body));
1759 body2->valid &= ~OBD_MD_FLCOOKIE;
1761 if (!(body->valid & OBD_MD_FLEASIZE) &&
1762 !(body->valid & OBD_MD_FLDIREA))
1765 if (body->eadatasize == 0) {
1766 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1770 LASSERT(master->rq_repmsg->buflens[1] >= body->eadatasize);
1772 ea = lustre_msg_buf(slave->rq_repmsg, 1, body->eadatasize);
1773 LASSERT(ea != NULL);
1775 ea2 = lustre_msg_buf(master->rq_repmsg, 1, body->eadatasize);
1776 LASSERT(ea2 != NULL);
1778 memcpy(ea2, ea, body->eadatasize);
1780 if (body->valid & OBD_MD_FLCOOKIE) {
1781 LASSERT(master->rq_repmsg->buflens[2] >=
1782 slave->rq_repmsg->buflens[2]);
1783 cookie = lustre_msg_buf(slave->rq_repmsg, 2,
1784 slave->rq_repmsg->buflens[2]);
1785 LASSERT(cookie != NULL);
1787 cookie2 = lustre_msg_buf(master->rq_repmsg, 2,
1788 master->rq_repmsg->buflens[2]);
1789 LASSERT(cookie2 != NULL);
1790 memcpy(cookie2, cookie, slave->rq_repmsg->buflens[2]);
1791 body2->valid |= OBD_MD_FLCOOKIE;
1796 static int mds_reint_unlink_remote(struct mds_update_record *rec,
1797 int offset, struct ptlrpc_request *req,
1798 struct lustre_handle *parent_lockh,
1799 int update_mode, struct dentry *dparent,
1800 struct lustre_handle *child_lockh,
1801 struct dentry *dchild)
1803 struct obd_device *obd = req->rq_export->exp_obd;
1804 struct mds_obd *mds = mds_req2mds(req);
1805 struct ptlrpc_request *request = NULL;
1806 int rc = 0, cleanup_phase = 0;
1807 struct mdc_op_data op_data;
1811 LASSERT(offset == 1 || offset == 3);
1813 /* time to drop i_nlink on remote MDS */
1814 memset(&op_data, 0, sizeof(op_data));
1815 mds_pack_dentry2id(obd, &op_data.id1, dchild, 1);
1816 op_data.create_mode = rec->ur_mode;
1818 DEBUG_REQ(D_INODE, req, "unlink %*s (remote inode "DLID4")",
1819 rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data.id1));
1821 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1822 DEBUG_REQ(D_HA, req, "unlink %*s (remote inode "DLID4")",
1823 rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data.id1));
1826 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1827 op_data.create_mode |= MDS_MODE_REPLAY;
1829 rc = md_unlink(mds->mds_lmv_exp, &op_data, &request);
1834 mds_copy_unlink_reply(req, request);
1835 ptlrpc_req_finished(request);
1839 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
1842 GOTO(cleanup, rc = PTR_ERR(handle));
1843 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, dchild);
1844 rc = mds_finish_transno(mds, dparent->d_inode, handle, req,
1849 req->rq_status = rc;
1852 if (parent_lockh[1].cookie != 0)
1853 ldlm_lock_decref(parent_lockh + 1, update_mode);
1855 ldlm_lock_decref(child_lockh, LCK_EX);
1857 ldlm_lock_decref(parent_lockh, LCK_PW);
1859 ptlrpc_save_lock(req, parent_lockh, LCK_PW);
1866 static int mds_reint_unlink(struct mds_update_record *rec, int offset,
1867 struct ptlrpc_request *req,
1868 struct lustre_handle *lh)
1870 struct dentry *dparent = NULL, *dchild;
1871 struct mds_obd *mds = mds_req2mds(req);
1872 struct obd_device *obd = req->rq_export->exp_obd;
1873 struct mds_body *body = NULL;
1874 struct inode *child_inode = NULL;
1875 struct lustre_handle parent_lockh[2] = {{0}, {0}};
1876 struct lustre_handle child_lockh = {0};
1877 struct lustre_handle child_reuse_lockh = {0};
1878 struct lustre_handle *slave_lockh = NULL;
1879 char idname[LL_ID_NAMELEN];
1880 struct llog_create_locks *lcl = NULL;
1881 void *handle = NULL;
1882 int rc = 0, cleanup_phase = 0;
1883 int unlink_by_id = 0;
1887 LASSERT(offset == 1 || offset == 3);
1889 DEBUG_REQ(D_INODE, req, "parent ino "LPU64"/%u, child %s",
1890 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
1893 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1895 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1896 DEBUG_REQ(D_HA, req, "unlink replay\n");
1897 LASSERT(offset == 1); /* should not come from intent */
1898 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
1899 lustre_msg_buf(req->rq_reqmsg, offset + 2, 0),
1900 req->rq_repmsg->buflens[2]);
1903 MDS_UPDATE_COUNTER(mds, MDS_UNLINK_COUNT);
1905 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
1906 GOTO(cleanup, rc = -ENOENT);
1908 if (rec->ur_namelen == 1) {
1909 /* this is request to drop i_nlink on local inode */
1911 rec->ur_name = idname;
1912 rc = mds_create_local_dentry(rec, obd);
1913 if (rc == -ENOENT || (rec->ur_mode & MDS_MODE_REPLAY)) {
1914 DEBUG_REQ(D_HA, req,
1915 "drop nlink on inode "DLID4" (replay)",
1916 OLID4(rec->ur_id1));
1922 if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
1923 /* master mds for directory asks slave removing inode is already
1925 dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL,
1926 LCK_PW, parent_lockh,
1927 &update_mode, rec->ur_name,
1929 MDS_INODELOCK_UPDATE);
1930 if (IS_ERR(dparent))
1931 GOTO(cleanup, rc = PTR_ERR(dparent));
1932 dchild = ll_lookup_one_len(rec->ur_name, dparent,
1933 rec->ur_namelen - 1);
1935 GOTO(cleanup, rc = PTR_ERR(dchild));
1936 child_lockh.cookie = 0;
1937 LASSERT(!(dchild->d_flags & DCACHE_CROSS_REF));
1938 LASSERT(dchild->d_inode != NULL);
1939 LASSERT(S_ISDIR(dchild->d_inode->i_mode));
1941 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1,
1942 parent_lockh, &dparent,
1943 LCK_PW, MDS_INODELOCK_UPDATE,
1944 &update_mode, rec->ur_name,
1945 rec->ur_namelen, &child_lockh,
1947 MDS_INODELOCK_LOOKUP |
1948 MDS_INODELOCK_UPDATE);
1953 if (dchild->d_flags & DCACHE_CROSS_REF) {
1954 /* we should have parent lock only here */
1955 LASSERT(unlink_by_id == 0);
1956 LASSERT(dchild->d_mdsnum != mds->mds_num);
1957 mds_reint_unlink_remote(rec, offset, req, parent_lockh,
1958 update_mode, dparent, &child_lockh, dchild);
1962 cleanup_phase = 1; /* dchild, dparent, locks */
1965 child_inode = dchild->d_inode;
1966 if (child_inode == NULL) {
1967 CDEBUG(D_INODE, "child doesn't exist (dir %lu, name %s)\n",
1968 dparent ? dparent->d_inode->i_ino : 0, rec->ur_name);
1969 GOTO(cleanup, rc = -ENOENT);
1972 cleanup_phase = 2; /* dchild has a lock */
1974 /* We have to do these checks ourselves, in case we are making an
1975 * orphan. The client tells us whether rmdir() or unlink() was called,
1976 * so we need to return appropriate errors (bug 72).
1978 * We don't have to check permissions, because vfs_rename (called from
1979 * mds_open_unlink_rename) also calls may_delete. */
1980 if ((rec->ur_mode & S_IFMT) == S_IFDIR) {
1981 if (!S_ISDIR(child_inode->i_mode))
1982 GOTO(cleanup, rc = -ENOTDIR);
1984 if (S_ISDIR(child_inode->i_mode))
1985 GOTO(cleanup, rc = -EISDIR);
1988 /* handle splitted dir */
1989 rc = mds_lock_slave_objs(obd, dchild, &slave_lockh);
1993 /* Step 4: Get a lock on the ino to sync with creation WRT inode
1994 * reuse (see bug 2029). */
1995 rc = mds_lock_new_child(obd, child_inode, &child_reuse_lockh);
1998 cleanup_phase = 3; /* child inum lock */
2000 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dparent->d_inode->i_sb);
2002 /* ldlm_reply in buf[0] if called via intent */
2008 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
2009 LASSERT(body != NULL);
2011 /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
2012 DOWN_READ_I_ALLOC_SEM(child_inode);
2013 cleanup_phase = 4; /* up(&child_inode->i_sem) when finished */
2015 /* If this is potentially the last reference to this inode, get the
2016 * OBD EA data first so the client can destroy OST objects. We
2017 * only do the object removal later if no open files/links remain. */
2018 if ((S_ISDIR(child_inode->i_mode) && child_inode->i_nlink == 2) ||
2019 child_inode->i_nlink == 1) {
2020 if (mds_orphan_open_count(child_inode) > 0) {
2021 /* need to lock pending_dir before transaction */
2022 down(&mds->mds_pending_dir->d_inode->i_sem);
2023 cleanup_phase = 5; /* up(&pending_dir->i_sem) */
2024 } else if (S_ISREG(child_inode->i_mode)) {
2025 mds_pack_inode2body(obd, body, child_inode, 0);
2026 mds_pack_md(obd, req->rq_repmsg, offset + 1,
2027 body, child_inode, MDS_PACK_MD_LOCK);
2031 /* Step 4: Do the unlink: we already verified ur_mode above (bug 72) */
2032 switch (child_inode->i_mode & S_IFMT) {
2034 /* Drop any lingering child directories before we start our
2035 * transaction, to avoid doing multiple inode dirty/delete
2036 * in our compound transaction (bug 1321). */
2037 shrink_dcache_parent(dchild);
2038 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
2041 GOTO(cleanup, rc = PTR_ERR(handle));
2042 rc = vfs_rmdir(dparent->d_inode, dchild);
2045 #warning "optimization is possible here: we could drop nlink w/o removing local dentry in FIDS/"
2046 struct lov_mds_md *lmm = lustre_msg_buf(req->rq_repmsg,
2048 handle = fsfilt_start_log(obd, dparent->d_inode,
2049 FSFILT_OP_UNLINK, NULL,
2050 le32_to_cpu(lmm->lmm_stripe_count));
2052 GOTO(cleanup, rc = PTR_ERR(handle));
2053 rc = vfs_unlink(dparent->d_inode, dchild);
2061 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK,
2064 GOTO(cleanup, rc = PTR_ERR(handle));
2065 rc = vfs_unlink(dparent->d_inode, dchild);
2068 CERROR("bad file type %o unlinking %s\n", rec->ur_mode,
2071 GOTO(cleanup, rc = -EINVAL);
2074 if (rc == 0 && child_inode->i_nlink == 0) {
2075 if (mds_orphan_open_count(child_inode) > 0)
2076 rc = mds_orphan_add_link(rec, obd, dchild);
2079 GOTO(cleanup, rc = 0);
2081 if (!S_ISREG(child_inode->i_mode))
2084 if (!(body->valid & OBD_MD_FLEASIZE)) {
2085 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
2086 OBD_MD_FLATIME | OBD_MD_FLMTIME);
2087 } else if (mds_log_op_unlink(obd, child_inode,
2088 lustre_msg_buf(req->rq_repmsg, offset + 1, 0),
2089 req->rq_repmsg->buflens[offset + 1],
2090 lustre_msg_buf(req->rq_repmsg, offset + 2, 0),
2091 req->rq_repmsg->buflens[offset+2],
2093 body->valid |= OBD_MD_FLCOOKIE;
2104 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
2105 LTIME_S(iattr.ia_mtime) = rec->ur_time;
2106 LTIME_S(iattr.ia_ctime) = rec->ur_time;
2108 err = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
2110 CERROR("error on parent setattr: rc = %d\n", err);
2112 rc = mds_finish_transno(mds, dparent ? dparent->d_inode : NULL,
2113 handle, req, rc, 0);
2115 (void)obd_set_info(mds->mds_lov_exp, strlen("unlinked"),
2116 "unlinked", 0, NULL);
2117 switch(cleanup_phase) {
2118 case 5: /* pending_dir semaphore */
2119 up(&mds->mds_pending_dir->d_inode->i_sem);
2120 case 4: /* child inode semaphore */
2121 UP_READ_I_ALLOC_SEM(child_inode);
2122 /* handle splitted dir */
2124 /* master directory can be non-empty or something else ... */
2125 mds_unlink_slave_objs(obd, dchild);
2128 ptlrpc_save_llog_lock(req, lcl);
2129 case 3: /* child ino-reuse lock */
2130 if (rc && body != NULL) {
2131 // Don't unlink the OST objects if the MDS unlink failed
2135 ldlm_lock_decref(&child_reuse_lockh, LCK_EX);
2137 ptlrpc_save_lock(req, &child_reuse_lockh, LCK_EX);
2138 case 2: /* child lock */
2139 mds_unlock_slave_objs(obd, dchild, slave_lockh);
2140 if (child_lockh.cookie)
2141 ldlm_lock_decref(&child_lockh, LCK_EX);
2142 case 1: /* child and parent dentry, parent lock */
2144 if (parent_lockh[1].cookie != 0)
2145 ldlm_lock_decref(parent_lockh + 1, update_mode);
2148 ldlm_lock_decref(parent_lockh, LCK_PW);
2150 ptlrpc_save_lock(req, parent_lockh, LCK_PW);
2157 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2160 req->rq_status = rc;
2165 * to service requests from remote MDS to increment i_nlink
2167 static int mds_reint_link_acquire(struct mds_update_record *rec,
2168 int offset, struct ptlrpc_request *req,
2169 struct lustre_handle *lh)
2171 struct obd_device *obd = req->rq_export->exp_obd;
2172 struct ldlm_res_id src_res_id = { .name = {0} };
2173 struct lustre_handle *handle = NULL, src_lockh = {0};
2174 struct mds_obd *mds = mds_req2mds(req);
2175 int rc = 0, cleanup_phase = 0;
2176 struct dentry *de_src = NULL;
2177 ldlm_policy_data_t policy;
2181 DEBUG_REQ(D_INODE, req, "%s: request to acquire i_nlinks "DLID4"\n",
2182 obd->obd_name, OLID4(rec->ur_id1));
2184 /* Step 1: Lookup the source inode and target directory by ID */
2185 de_src = mds_id2dentry(obd, rec->ur_id1, NULL);
2187 GOTO(cleanup, rc = PTR_ERR(de_src));
2188 cleanup_phase = 1; /* source dentry */
2190 src_res_id.name[0] = id_fid(rec->ur_id1);
2191 src_res_id.name[1] = id_group(rec->ur_id1);
2192 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
2194 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
2195 src_res_id, LDLM_IBITS, &policy,
2196 LCK_EX, &flags, mds_blocking_ast,
2197 ldlm_completion_ast, NULL, NULL,
2198 NULL, 0, NULL, &src_lockh);
2200 GOTO(cleanup, rc = -ENOLCK);
2201 cleanup_phase = 2; /* lock */
2203 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
2205 handle = fsfilt_start(obd, de_src->d_inode, FSFILT_OP_LINK, NULL);
2206 if (IS_ERR(handle)) {
2207 rc = PTR_ERR(handle);
2210 de_src->d_inode->i_nlink++;
2211 mark_inode_dirty(de_src->d_inode);
2214 rc = mds_finish_transno(mds, de_src ? de_src->d_inode : NULL,
2215 handle, req, rc, 0);
2217 switch (cleanup_phase) {
2220 ldlm_lock_decref(&src_lockh, LCK_EX);
2222 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
2228 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2231 req->rq_status = rc;
2236 * request to link to foreign inode:
2237 * - acquire i_nlinks on this inode
2240 static int mds_reint_link_to_remote(struct mds_update_record *rec,
2241 int offset, struct ptlrpc_request *req,
2242 struct lustre_handle *lh)
2244 struct lustre_handle *handle = NULL, tgt_dir_lockh[2] = {{0}, {0}};
2245 struct obd_device *obd = req->rq_export->exp_obd;
2246 struct dentry *de_tgt_dir = NULL;
2247 struct mds_obd *mds = mds_req2mds(req);
2248 int rc = 0, cleanup_phase = 0;
2249 struct mdc_op_data op_data;
2250 struct ptlrpc_request *request = NULL;
2254 DEBUG_REQ(D_INODE, req, "%s: request to link "DLID4
2255 ":%*s to foreign inode "DLID4"\n", obd->obd_name,
2256 OLID4(rec->ur_id2), rec->ur_namelen - 1, rec->ur_name,
2257 OLID4(rec->ur_id1));
2259 de_tgt_dir = mds_id2locked_dentry(obd, rec->ur_id2, NULL, LCK_EX,
2260 tgt_dir_lockh, &update_mode,
2261 rec->ur_name, rec->ur_namelen - 1,
2262 MDS_INODELOCK_UPDATE);
2263 if (IS_ERR(de_tgt_dir))
2264 GOTO(cleanup, rc = PTR_ERR(de_tgt_dir));
2267 op_data.id1 = *(rec->ur_id1);
2268 op_data.namelen = 0;
2269 op_data.name = NULL;
2270 rc = md_link(mds->mds_lmv_exp, &op_data, &request);
2276 ptlrpc_req_finished(request);
2278 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_tgt_dir->d_inode->i_sb);
2280 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
2281 if (IS_ERR(handle)) {
2282 rc = PTR_ERR(handle);
2286 rc = fsfilt_add_dir_entry(obd, de_tgt_dir, rec->ur_name,
2287 rec->ur_namelen - 1, id_ino(rec->ur_id1),
2288 id_gen(rec->ur_id1), id_group(rec->ur_id1),
2289 id_fid(rec->ur_id1));
2293 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
2294 handle, req, rc, 0);
2297 switch (cleanup_phase) {
2300 /* FIXME: drop i_nlink on remote inode here */
2301 CERROR("MUST drop drop i_nlink here\n");
2306 ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
2308 ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
2311 ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
2313 ptlrpc_save_lock(req, tgt_dir_lockh+1, update_mode);
2319 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2322 req->rq_status = rc;
2326 static int mds_reint_link(struct mds_update_record *rec, int offset,
2327 struct ptlrpc_request *req,
2328 struct lustre_handle *lh)
2330 struct obd_device *obd = req->rq_export->exp_obd;
2331 struct dentry *de_src = NULL;
2332 struct dentry *de_tgt_dir = NULL;
2333 struct dentry *dchild = NULL;
2334 struct mds_obd *mds = mds_req2mds(req);
2335 struct lustre_handle *handle = NULL;
2336 struct lustre_handle tgt_dir_lockh[2] = {{0}, {0}}, src_lockh = {0};
2337 struct ldlm_res_id src_res_id = { .name = {0} };
2338 struct ldlm_res_id tgt_dir_res_id = { .name = {0} };
2339 ldlm_policy_data_t src_policy ={.l_inodebits = {MDS_INODELOCK_UPDATE}};
2340 ldlm_policy_data_t tgt_dir_policy =
2341 {.l_inodebits = {MDS_INODELOCK_UPDATE}};
2342 int rc = 0, cleanup_phase = 0;
2344 int update_mode = 0;
2348 LASSERT(offset == 1);
2350 DEBUG_REQ(D_INODE, req, "original "LPU64"/%u to "LPU64"/%u %s",
2351 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
2352 id_ino(rec->ur_id2), id_gen(rec->ur_id2),
2355 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
2356 MDS_UPDATE_COUNTER(mds, MDS_LINK_COUNT);
2358 // memset(tgt_dir_lockh, 0, 2*sizeof(tgt_dir_lockh[0]));
2359 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
2360 GOTO(cleanup, rc = -ENOENT);
2362 if (id_group(rec->ur_id1) != mds->mds_num) {
2363 rc = mds_reint_link_to_remote(rec, offset, req, lh);
2367 if (rec->ur_namelen == 1) {
2368 rc = mds_reint_link_acquire(rec, offset, req, lh);
2372 /* Step 1: Lookup the source inode and target directory by ID */
2373 de_src = mds_id2dentry(obd, rec->ur_id1, NULL);
2375 GOTO(cleanup, rc = PTR_ERR(de_src));
2377 cleanup_phase = 1; /* source dentry */
2379 de_tgt_dir = mds_id2dentry(obd, rec->ur_id2, NULL);
2380 if (IS_ERR(de_tgt_dir)) {
2381 rc = PTR_ERR(de_tgt_dir);
2386 cleanup_phase = 2; /* target directory dentry */
2388 CDEBUG(D_INODE, "linking %*s/%s to inode %lu\n",
2389 de_tgt_dir->d_name.len, de_tgt_dir->d_name.name,
2390 rec->ur_name, de_src->d_inode->i_ino);
2392 /* Step 2: Take the two locks */
2393 src_res_id.name[0] = id_fid(rec->ur_id1);
2394 src_res_id.name[1] = id_group(rec->ur_id1);
2395 tgt_dir_res_id.name[0] = id_fid(rec->ur_id2);
2396 tgt_dir_res_id.name[1] = id_group(rec->ur_id2);
2399 if (IS_PDIROPS(de_tgt_dir->d_inode)) {
2401 update_mode = mds_lock_mode_for_dir(obd, de_tgt_dir, LCK_EX);
2403 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
2404 tgt_dir_res_id, LDLM_IBITS,
2405 &src_policy, update_mode, &flags,
2407 ldlm_completion_ast, NULL, NULL,
2408 NULL, 0, NULL, tgt_dir_lockh + 1);
2410 GOTO(cleanup, rc = -ENOLCK);
2413 tgt_dir_res_id.name[2] = full_name_hash(rec->ur_name,
2414 rec->ur_namelen - 1);
2415 CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n",
2416 (unsigned long)id_fid(rec->ur_id2),
2417 (unsigned long)id_group(rec->ur_id2),
2418 tgt_dir_res_id.name[2]);
2421 rc = enqueue_ordered_locks(obd, &src_res_id, &src_lockh, LCK_EX,
2422 &src_policy, &tgt_dir_res_id, tgt_dir_lockh,
2423 LCK_EX, &tgt_dir_policy);
2427 cleanup_phase = 3; /* locks */
2429 /* Step 3: Lookup the child */
2430 dchild = ll_lookup_one_len(rec->ur_name, de_tgt_dir,
2431 rec->ur_namelen - 1);
2432 if (IS_ERR(dchild)) {
2433 rc = PTR_ERR(dchild);
2434 if (rc != -EPERM && rc != -EACCES)
2435 CERROR("child lookup error %d\n", rc);
2439 cleanup_phase = 4; /* child dentry */
2441 if (dchild->d_inode) {
2442 CDEBUG(D_INODE, "child exists (dir %lu, name %s)\n",
2443 de_tgt_dir->d_inode->i_ino, rec->ur_name);
2448 /* Step 4: Do it. */
2449 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
2451 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
2452 if (IS_ERR(handle)) {
2453 rc = PTR_ERR(handle);
2457 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
2458 if (rc && rc != -EPERM && rc != -EACCES)
2459 CERROR("vfs_link error %d\n", rc);
2461 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
2462 handle, req, rc, 0);
2465 switch (cleanup_phase) {
2466 case 4: /* child dentry */
2470 ldlm_lock_decref(&src_lockh, LCK_EX);
2471 ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
2473 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
2474 ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
2476 case 2: /* target dentry */
2478 if (tgt_dir_lockh[1].cookie && update_mode)
2479 ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
2483 case 1: /* source dentry */
2488 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2491 req->rq_status = rc;
2495 /* The idea here is that we need to get four locks in the end:
2496 * one on each parent directory, one on each child. We need to take
2497 * these locks in some kind of order (to avoid deadlocks), and the order
2498 * I selected is "increasing resource number" order. We need to look up
2499 * the children, however, before we know what the resource number(s) are.
2500 * Thus the following plan:
2502 * 1,2. Look up the parents
2503 * 3,4. Look up the children
2504 * 5. Take locks on the parents and children, in order
2505 * 6. Verify that the children haven't changed since they were looked up
2507 * If there was a race and the children changed since they were first looked
2508 * up, it is possible that mds_verify_child() will be able to just grab the
2509 * lock on the new child resource (if it has a higher resource than any other)
2510 * but we need to compare against not only its parent, but also against the
2511 * parent and child of the "other half" of the rename, hence maxres_{src,tgt}.
2513 * We need the fancy igrab() on the child inodes because we aren't holding a
2514 * lock on the parent after the lookup is done, so dentry->d_inode may change
2515 * at any time, and igrab() itself doesn't like getting passed a NULL argument.
2517 static int mds_get_parents_children_locked(struct obd_device *obd,
2518 struct mds_obd *mds,
2519 struct lustre_id *p1_id,
2520 struct dentry **de_srcdirp,
2521 struct lustre_id *p2_id,
2522 struct dentry **de_tgtdirp,
2524 const char *old_name, int old_len,
2525 struct dentry **de_oldp,
2526 const char *new_name, int new_len,
2527 struct dentry **de_newp,
2528 struct lustre_handle *dlm_handles,
2531 struct ldlm_res_id p1_res_id = { .name = {0} };
2532 struct ldlm_res_id p2_res_id = { .name = {0} };
2533 struct ldlm_res_id c1_res_id = { .name = {0} };
2534 struct ldlm_res_id c2_res_id = { .name = {0} };
2535 ldlm_policy_data_t p_policy = {.l_inodebits = {MDS_INODELOCK_UPDATE}};
2536 /* Only dentry should change, but the inode itself would be
2538 ldlm_policy_data_t c1_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP}};
2539 /* If something is going to be replaced, both dentry and inode locks are
2541 ldlm_policy_data_t c2_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP|
2542 MDS_INODELOCK_UPDATE}};
2543 struct ldlm_res_id *maxres_src, *maxres_tgt;
2544 struct inode *inode;
2545 __u32 child1_gen = 0;
2546 __u32 child2_gen = 0;
2547 unsigned long child1_ino;
2548 unsigned long child2_ino;
2549 int rc = 0, cleanup_phase = 0;
2552 /* Step 1: Lookup the source directory */
2553 *de_srcdirp = mds_id2dentry(obd, p1_id, NULL);
2554 if (IS_ERR(*de_srcdirp))
2555 GOTO(cleanup, rc = PTR_ERR(*de_srcdirp));
2557 cleanup_phase = 1; /* source directory dentry */
2559 p1_res_id.name[0] = id_fid(p1_id);
2560 p1_res_id.name[1] = id_group(p1_id);
2562 /* Step 2: Lookup the target directory */
2563 if (id_equal_stc(p1_id, p2_id)) {
2564 *de_tgtdirp = dget(*de_srcdirp);
2566 *de_tgtdirp = mds_id2dentry(obd, p2_id, NULL);
2567 if (IS_ERR(*de_tgtdirp)) {
2568 rc = PTR_ERR(*de_tgtdirp);
2574 cleanup_phase = 2; /* target directory dentry */
2576 p2_res_id.name[0] = id_fid(p2_id);
2577 p2_res_id.name[1] = id_group(p2_id);
2580 dlm_handles[5].cookie = 0;
2581 dlm_handles[6].cookie = 0;
2583 if (IS_PDIROPS((*de_srcdirp)->d_inode)) {
2585 * get a temp lock on just fid, group to flush client cache and
2586 * to protect dirs from concurrent splitting.
2588 rc = enqueue_ordered_locks(obd, &p1_res_id, &dlm_handles[5],
2589 LCK_PW, &p_policy, &p2_res_id,
2590 &dlm_handles[6], LCK_PW, &p_policy);
2594 p1_res_id.name[2] = full_name_hash(old_name, old_len - 1);
2595 p2_res_id.name[2] = full_name_hash(new_name, new_len - 1);
2597 CDEBUG(D_INFO, "take locks on "
2598 LPX64":"LPX64":"LPX64", "LPX64":"LPX64":"LPX64"\n",
2599 p1_res_id.name[0], p1_res_id.name[1], p1_res_id.name[2],
2600 p2_res_id.name[0], p2_res_id.name[1], p2_res_id.name[2]);
2605 /* Step 3: Lookup the source child entry */
2606 *de_oldp = ll_lookup_one_len(old_name, *de_srcdirp,
2608 if (IS_ERR(*de_oldp)) {
2609 rc = PTR_ERR(*de_oldp);
2610 CERROR("old child lookup error (%*s): %d\n",
2611 old_len - 1, old_name, rc);
2615 cleanup_phase = 4; /* original name dentry */
2617 inode = (*de_oldp)->d_inode;
2618 if (inode != NULL) {
2619 struct lustre_id sid;
2621 inode = igrab(inode);
2623 GOTO(cleanup, rc = -ENOENT);
2625 down(&inode->i_sem);
2626 rc = mds_read_inode_sid(obd, inode, &sid);
2629 CERROR("Can't read inode self id, inode %lu, "
2630 "rc %d\n", inode->i_ino, rc);
2635 c1_res_id.name[0] = id_fid(&sid);
2636 c1_res_id.name[1] = id_group(&sid);
2637 child1_gen = inode->i_generation;
2638 child1_ino = inode->i_ino;
2640 } else if ((*de_oldp)->d_flags & DCACHE_CROSS_REF) {
2641 c1_res_id.name[0] = (*de_oldp)->d_fid;
2642 c1_res_id.name[1] = (*de_oldp)->d_mdsnum;
2643 child1_gen = (*de_oldp)->d_generation;
2644 child1_ino = (*de_oldp)->d_inum;
2646 GOTO(cleanup, rc = -ENOENT);
2649 /* Step 4: Lookup the target child entry */
2650 *de_newp = ll_lookup_one_len(new_name, *de_tgtdirp,
2652 if (IS_ERR(*de_newp)) {
2653 rc = PTR_ERR(*de_newp);
2654 CERROR("new child lookup error (%*s): %d\n",
2655 old_len - 1, old_name, rc);
2659 cleanup_phase = 5; /* target dentry */
2661 inode = (*de_newp)->d_inode;
2662 if (inode != NULL) {
2663 struct lustre_id sid;
2665 inode = igrab(inode);
2669 down(&inode->i_sem);
2670 rc = mds_read_inode_sid(obd, inode, &sid);
2673 CERROR("Can't read inode self id, inode %lu, "
2674 "rc %d\n", inode->i_ino, rc);
2678 c2_res_id.name[0] = id_fid(&sid);
2679 c2_res_id.name[1] = id_group(&sid);
2680 child2_gen = inode->i_generation;
2681 child2_ino = inode->i_ino;
2683 } else if ((*de_newp)->d_flags & DCACHE_CROSS_REF) {
2684 c2_res_id.name[0] = (*de_newp)->d_fid;
2685 c2_res_id.name[1] = (*de_newp)->d_mdsnum;
2686 child2_gen = (*de_newp)->d_generation;
2687 child2_ino = (*de_newp)->d_inum;
2691 /* Step 5: Take locks on the parents and child(ren) */
2692 maxres_src = &p1_res_id;
2693 maxres_tgt = &p2_res_id;
2694 cleanup_phase = 5; /* target dentry */
2696 if (c1_res_id.name[0] != 0 && res_gt(&c1_res_id, &p1_res_id, NULL, NULL))
2697 maxres_src = &c1_res_id;
2698 if (c2_res_id.name[0] != 0 && res_gt(&c2_res_id, &p2_res_id, NULL, NULL))
2699 maxres_tgt = &c2_res_id;
2701 rc = enqueue_4ordered_locks(obd, &p1_res_id, &dlm_handles[0], parent_mode,
2703 &p2_res_id, &dlm_handles[1], parent_mode,
2705 &c1_res_id, &dlm_handles[2], child_mode,
2707 &c2_res_id, &dlm_handles[3], child_mode,
2712 cleanup_phase = 6; /* parent and child(ren) locks */
2714 /* Step 6a: Re-lookup source child to verify it hasn't changed */
2715 rc = mds_verify_child(obd, &p1_res_id, &dlm_handles[0], *de_srcdirp,
2716 parent_mode, &c1_res_id, &dlm_handles[2],
2717 de_oldp, child_mode, &c1_policy, old_name,old_len,
2718 maxres_tgt, child1_ino, child1_gen);
2720 if (c2_res_id.name[0] != 0)
2721 ldlm_lock_decref(&dlm_handles[3], child_mode);
2722 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2729 if (!DENTRY_VALID(*de_oldp))
2730 GOTO(cleanup, rc = -ENOENT);
2732 /* Step 6b: Re-lookup target child to verify it hasn't changed */
2733 rc = mds_verify_child(obd, &p2_res_id, &dlm_handles[1], *de_tgtdirp,
2734 parent_mode, &c2_res_id, &dlm_handles[3],
2735 de_newp, child_mode, &c2_policy, new_name,
2736 new_len, maxres_src, child2_ino, child2_gen);
2738 ldlm_lock_decref(&dlm_handles[2], child_mode);
2739 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2749 switch (cleanup_phase) {
2750 case 6: /* child lock(s) */
2751 if (c2_res_id.name[0] != 0)
2752 ldlm_lock_decref(&dlm_handles[3], child_mode);
2753 if (c1_res_id.name[0] != 0)
2754 ldlm_lock_decref(&dlm_handles[2], child_mode);
2755 if (dlm_handles[1].cookie != 0)
2756 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2757 if (dlm_handles[0].cookie != 0)
2758 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2759 case 5: /* target dentry */
2761 case 4: /* source dentry */
2765 if (dlm_handles[5].cookie != 0)
2766 ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
2767 if (dlm_handles[6].cookie != 0)
2768 ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
2770 case 2: /* target directory dentry */
2771 l_dput(*de_tgtdirp);
2772 case 1: /* source directry dentry */
2773 l_dput(*de_srcdirp);
2781 * checks if dentry can be removed. This function also handles cross-ref
2784 static int mds_check_for_rename(struct obd_device *obd,
2785 struct dentry *dentry)
2787 struct mds_obd *mds = &obd->u.mds;
2788 struct lustre_handle *rlockh;
2789 struct ptlrpc_request *req;
2790 struct mdc_op_data op_data;
2791 struct lookup_intent it;
2792 int handle_size, rc = 0;
2795 LASSERT(dentry != NULL);
2797 if (dentry->d_inode) {
2798 if (S_ISDIR(dentry->d_inode->i_mode) &&
2799 !mds_is_dir_empty(obd, dentry))
2802 LASSERT((dentry->d_flags & DCACHE_CROSS_REF));
2803 handle_size = sizeof(struct lustre_handle);
2805 OBD_ALLOC(rlockh, handle_size);
2809 memset(rlockh, 0, handle_size);
2810 memset(&op_data, 0, sizeof(op_data));
2811 mds_pack_dentry2id(obd, &op_data.id1, dentry, 1);
2813 it.it_op = IT_UNLINK;
2814 rc = md_enqueue(mds->mds_lmv_exp, LDLM_IBITS, &it, LCK_EX,
2815 &op_data, rlockh, NULL, 0, ldlm_completion_ast,
2816 mds_blocking_ast, NULL);
2821 if (rlockh->cookie != 0)
2822 ldlm_lock_decref(rlockh, LCK_EX);
2824 if (it.d.lustre.it_data) {
2825 req = (struct ptlrpc_request *)it.d.lustre.it_data;
2826 ptlrpc_req_finished(req);
2829 if (it.d.lustre.it_status)
2830 rc = it.d.lustre.it_status;
2831 OBD_FREE(rlockh, handle_size);
2836 static int mds_add_local_dentry(struct mds_update_record *rec, int offset,
2837 struct ptlrpc_request *req, struct lustre_id *id,
2838 struct dentry *de_dir, struct dentry *de,
2841 struct obd_device *obd = req->rq_export->exp_obd;
2842 struct mds_obd *mds = mds_req2mds(req);
2843 void *handle = NULL;
2849 * name exists and points to local inode try to unlink this name
2850 * and create new one.
2852 CDEBUG(D_OTHER, "%s: %s points to local inode %lu/%lu\n",
2853 obd->obd_name, rec->ur_tgt, (unsigned long)de->d_inode->i_ino,
2854 (unsigned long)de->d_inode->i_generation);
2856 /* checking if we can remove local dentry. */
2857 rc = mds_check_for_rename(obd, de);
2861 handle = fsfilt_start(obd, de_dir->d_inode,
2862 FSFILT_OP_RENAME, NULL);
2864 GOTO(cleanup, rc = PTR_ERR(handle));
2865 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de);
2868 } else if (de->d_flags & DCACHE_CROSS_REF) {
2869 struct lustre_id de_id;
2871 /* name exists and points to remote inode */
2872 mds_pack_dentry2id(obd, &de_id, de, 1);
2874 CDEBUG(D_OTHER, "%s: %s points to remote inode "DLID4"\n",
2875 obd->obd_name, rec->ur_tgt, OLID4(&de_id));
2877 /* checking if we can remove local dentry. */
2878 rc = mds_check_for_rename(obd, de);
2883 * to be fully POSIX compatible, we should add one more check:
2885 * if de_new is subdir of dir rec->ur_id1. If so - return
2888 * I do not know how to implement it right now, because
2889 * inodes/dentries for new and old names lie on different MDS,
2890 * so add this notice here just to make it visible for the rest
2891 * of developers and do not forget about. And when this check
2892 * will be added, del_cross_ref should gone, that is local
2893 * dentry is able to be removed if all checks passed.
2895 * Currently -EEXISTS is returned by fsfilt_add_dir_entry() what
2896 * is not fully correct. --umka
2899 if (del_cross_ref) {
2900 handle = fsfilt_start(obd, de_dir->d_inode,
2901 FSFILT_OP_RENAME, NULL);
2903 GOTO(cleanup, rc = PTR_ERR(handle));
2904 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de);
2910 /* name doesn't exist. the simplest case. */
2911 handle = fsfilt_start(obd, de_dir->d_inode,
2912 FSFILT_OP_LINK, NULL);
2914 GOTO(cleanup, rc = PTR_ERR(handle));
2917 rc = fsfilt_add_dir_entry(obd, de_dir, rec->ur_tgt,
2918 rec->ur_tgtlen - 1, id_ino(id),
2919 id_gen(id), id_group(id), id_fid(id));
2921 CERROR("add_dir_entry() returned error %d\n", rc);
2927 rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL,
2928 handle, req, rc, 0);
2933 static int mds_del_local_dentry(struct mds_update_record *rec, int offset,
2934 struct ptlrpc_request *req, struct dentry *de_dir,
2937 struct obd_device *obd = req->rq_export->exp_obd;
2938 struct mds_obd *mds = mds_req2mds(req);
2939 void *handle = NULL;
2943 handle = fsfilt_start(obd, de_dir->d_inode, FSFILT_OP_UNLINK, NULL);
2945 GOTO(cleanup, rc = PTR_ERR(handle));
2946 rc = fsfilt_del_dir_entry(obd, de);
2951 rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL,
2952 handle, req, rc, 0);
2956 static int mds_reint_rename_create_name(struct mds_update_record *rec,
2957 int offset, struct ptlrpc_request *req)
2959 struct lustre_handle parent_lockh[2] = {{0}, {0}};
2960 struct obd_device *obd = req->rq_export->exp_obd;
2961 struct mds_obd *mds = mds_req2mds(req);
2962 struct lustre_handle child_lockh = {0};
2963 struct dentry *de_tgtdir = NULL;
2964 struct dentry *de_new = NULL;
2965 int cleanup_phase = 0;
2966 int update_mode, rc = 0;
2970 * another MDS executing rename operation has asked us to create target
2971 * name. such a creation should destroy existing target name.
2973 CDEBUG(D_OTHER, "%s: request to create name %s for "DLID4"\n",
2974 obd->obd_name, rec->ur_tgt, OLID4(rec->ur_id1));
2976 /* first, lookup the target */
2977 child_lockh.cookie = 0;
2979 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id2, parent_lockh,
2980 &de_tgtdir, LCK_PW, MDS_INODELOCK_UPDATE,
2981 &update_mode, rec->ur_tgt, rec->ur_tgtlen,
2982 &child_lockh, &de_new, LCK_EX,
2983 MDS_INODELOCK_LOOKUP);
2990 LASSERT(de_tgtdir->d_inode);
2993 rc = mds_add_local_dentry(rec, offset, req, rec->ur_id1,
2994 de_tgtdir, de_new, 0);
2999 if (cleanup_phase == 1) {
3001 if (parent_lockh[1].cookie != 0)
3002 ldlm_lock_decref(&parent_lockh[1], update_mode);
3004 ldlm_lock_decref(&parent_lockh[0], LCK_PW);
3005 if (child_lockh.cookie != 0)
3006 ldlm_lock_decref(&child_lockh, LCK_EX);
3011 req->rq_status = rc;
3015 static int mds_reint_rename_to_remote(struct mds_update_record *rec, int offset,
3016 struct ptlrpc_request *req)
3018 struct obd_device *obd = req->rq_export->exp_obd;
3019 struct ptlrpc_request *req2 = NULL;
3020 struct dentry *de_srcdir = NULL;
3021 struct dentry *de_old = NULL;
3022 struct mds_obd *mds = mds_req2mds(req);
3023 struct lustre_handle parent_lockh[2] = {{0}, {0}};
3024 struct lustre_handle child_lockh = {0};
3025 struct mdc_op_data opdata;
3026 int update_mode, rc = 0;
3029 CDEBUG(D_OTHER, "%s: move name %s onto another mds #%lu\n",
3030 obd->obd_name, rec->ur_name, (unsigned long)id_group(rec->ur_id2));
3031 memset(&opdata, 0, sizeof(opdata));
3033 child_lockh.cookie = 0;
3034 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1, parent_lockh,
3035 &de_srcdir, LCK_PW, MDS_INODELOCK_UPDATE,
3036 &update_mode, rec->ur_name,
3037 rec->ur_namelen, &child_lockh, &de_old,
3038 LCK_EX, MDS_INODELOCK_LOOKUP);
3041 LASSERT(de_srcdir->d_inode);
3045 * we already know the target should be created on another MDS so, we
3046 * have to request that MDS to do it.
3049 /* prepare source id */
3050 if (de_old->d_flags & DCACHE_CROSS_REF) {
3051 LASSERT(de_old->d_inode == NULL);
3052 CDEBUG(D_OTHER, "request to move remote name\n");
3053 mds_pack_dentry2id(obd, &opdata.id1, de_old, 1);
3054 } else if (de_old->d_inode == NULL) {
3055 /* oh, source doesn't exist */
3056 GOTO(cleanup, rc = -ENOENT);
3058 struct lustre_id sid;
3059 struct inode *inode = de_old->d_inode;
3061 LASSERT(inode != NULL);
3062 CDEBUG(D_OTHER, "request to move local name\n");
3063 id_ino(&opdata.id1) = inode->i_ino;
3064 id_group(&opdata.id1) = mds->mds_num;
3065 id_gen(&opdata.id1) = inode->i_generation;
3067 down(&inode->i_sem);
3068 rc = mds_read_inode_sid(obd, inode, &sid);
3071 CERROR("Can't read inode self id, "
3072 "inode %lu, rc = %d\n",
3077 id_fid(&opdata.id1) = id_fid(&sid);
3080 opdata.id2 = *rec->ur_id2;
3081 rc = md_rename(mds->mds_lmv_exp, &opdata, NULL, 0,
3082 rec->ur_tgt, rec->ur_tgtlen - 1, &req2);
3087 rc = mds_del_local_dentry(rec, offset, req, de_srcdir,
3093 ptlrpc_req_finished(req2);
3096 if (parent_lockh[1].cookie != 0)
3097 ldlm_lock_decref(&parent_lockh[1], update_mode);
3099 ldlm_lock_decref(&parent_lockh[0], LCK_PW);
3100 if (child_lockh.cookie != 0)
3101 ldlm_lock_decref(&child_lockh, LCK_EX);
3106 req->rq_status = rc;
3110 static int mds_reint_rename(struct mds_update_record *rec, int offset,
3111 struct ptlrpc_request *req, struct lustre_handle *lockh)
3113 struct obd_device *obd = req->rq_export->exp_obd;
3114 struct dentry *de_srcdir = NULL;
3115 struct dentry *de_tgtdir = NULL;
3116 struct dentry *de_old = NULL;
3117 struct dentry *de_new = NULL;
3118 struct inode *old_inode = NULL, *new_inode = NULL;
3119 struct mds_obd *mds = mds_req2mds(req);
3120 struct lustre_handle dlm_handles[7] = {{0},{0},{0},{0},{0},{0},{0}};
3121 struct mds_body *body = NULL;
3122 struct llog_create_locks *lcl = NULL;
3123 struct lov_mds_md *lmm = NULL;
3124 int rc = 0, cleanup_phase = 0;
3125 void *handle = NULL;
3128 LASSERT(offset == 1);
3130 DEBUG_REQ(D_INODE, req, "parent "DLID4" %s to "DLID4" %s",
3131 OLID4(rec->ur_id1), rec->ur_name, OLID4(rec->ur_id2),
3134 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
3136 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
3137 DEBUG_REQ(D_HA, req, "rename replay\n");
3138 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
3139 lustre_msg_buf(req->rq_reqmsg, offset + 3, 0),
3140 req->rq_repmsg->buflens[2]);
3143 MDS_UPDATE_COUNTER(mds, MDS_RENAME_COUNT);
3145 if (rec->ur_namelen == 1) {
3146 rc = mds_reint_rename_create_name(rec, offset, req);
3150 /* check if new name should be located on remote target. */
3151 if (id_group(rec->ur_id2) != mds->mds_num) {
3152 rc = mds_reint_rename_to_remote(rec, offset, req);
3156 rc = mds_get_parents_children_locked(obd, mds, rec->ur_id1, &de_srcdir,
3157 rec->ur_id2, &de_tgtdir, LCK_PW,
3158 rec->ur_name, rec->ur_namelen,
3159 &de_old, rec->ur_tgt,
3160 rec->ur_tgtlen, &de_new,
3161 dlm_handles, LCK_EX);
3165 cleanup_phase = 1; /* parent(s), children, locks */
3166 old_inode = de_old->d_inode;
3167 new_inode = de_new->d_inode;
3169 /* sanity check for src inode */
3170 if (de_old->d_flags & DCACHE_CROSS_REF) {
3171 LASSERT(de_old->d_inode == NULL);
3174 * in the case of cross-ref dir, we can perform this check only
3175 * if child and parent lie on the same mds. This is because
3176 * otherwise they can have the same inode numbers.
3178 if (de_old->d_mdsnum == mds->mds_num) {
3179 if (de_old->d_inum == de_srcdir->d_inode->i_ino ||
3180 de_old->d_inum == de_tgtdir->d_inode->i_ino)
3181 GOTO(cleanup, rc = -EINVAL);
3184 LASSERT(de_old->d_inode != NULL);
3185 if (de_old->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
3186 de_old->d_inode->i_ino == de_tgtdir->d_inode->i_ino)
3187 GOTO(cleanup, rc = -EINVAL);
3190 /* sanity check for dest inode */
3191 if (de_new->d_flags & DCACHE_CROSS_REF) {
3192 LASSERT(new_inode == NULL);
3194 /* the same check about target dentry. */
3195 if (de_new->d_mdsnum == mds->mds_num) {
3196 if (de_new->d_inum == de_srcdir->d_inode->i_ino ||
3197 de_new->d_inum == de_tgtdir->d_inode->i_ino)
3198 GOTO(cleanup, rc = -EINVAL);
3202 * regular files usualy do not have ->rename() implemented. But
3203 * we handle only this case when @de_new is cross-ref entry,
3204 * because in other cases it will be handled by vfs_rename().
3206 if (de_old->d_inode && (!de_old->d_inode->i_op ||
3207 !de_old->d_inode->i_op->rename))
3208 GOTO(cleanup, rc = -EPERM);
3211 (new_inode->i_ino == de_srcdir->d_inode->i_ino ||
3212 new_inode->i_ino == de_tgtdir->d_inode->i_ino))
3213 GOTO(cleanup, rc = -EINVAL);
3217 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
3219 * check if we are moving old entry into its child. 2.6 does not check
3220 * for this in vfs_rename() anymore.
3222 if (is_subdir(de_new, de_old))
3223 GOTO(cleanup, rc = -EINVAL);
3226 /* check if inodes point to each other. */
3227 if (!(de_old->d_flags & DCACHE_CROSS_REF) &&
3228 !(de_new->d_flags & DCACHE_CROSS_REF) &&
3229 old_inode == new_inode)
3230 GOTO(cleanup, rc = 0);
3233 * if we are about to remove the target at first, pass the EA of that
3234 * inode to client to perform and cleanup on OST.
3236 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
3237 LASSERT(body != NULL);
3239 /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
3241 DOWN_READ_I_ALLOC_SEM(new_inode);
3243 cleanup_phase = 2; /* up(&new_inode->i_sem) when finished */
3245 if (new_inode && ((S_ISDIR(new_inode->i_mode) &&
3246 new_inode->i_nlink == 2) ||
3247 new_inode->i_nlink == 1)) {
3248 if (mds_orphan_open_count(new_inode) > 0) {
3249 /* need to lock pending_dir before transaction */
3250 down(&mds->mds_pending_dir->d_inode->i_sem);
3251 cleanup_phase = 3; /* up(&pending_dir->i_sem) */
3252 } else if (S_ISREG(new_inode->i_mode)) {
3253 mds_pack_inode2body(obd, body, new_inode, 0);
3254 mds_pack_md(obd, req->rq_repmsg, 1, body,
3255 new_inode, MDS_PACK_MD_LOCK);
3259 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
3260 de_srcdir->d_inode->i_sb);
3262 if (de_old->d_flags & DCACHE_CROSS_REF) {
3263 struct lustre_id old_id;
3265 mds_pack_dentry2id(obd, &old_id, de_old, 1);
3267 rc = mds_add_local_dentry(rec, offset, req, &old_id,
3268 de_tgtdir, de_new, 1);
3272 rc = mds_del_local_dentry(rec, offset, req, de_srcdir,
3277 lmm = lustre_msg_buf(req->rq_repmsg, 1, 0);
3278 handle = fsfilt_start_log(obd, de_tgtdir->d_inode, FSFILT_OP_RENAME,
3279 NULL, le32_to_cpu(lmm->lmm_stripe_count));
3282 GOTO(cleanup, rc = PTR_ERR(handle));
3285 de_old->d_fsdata = req;
3286 de_new->d_fsdata = req;
3287 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
3290 if (rc == 0 && new_inode != NULL && new_inode->i_nlink == 0) {
3291 if (mds_orphan_open_count(new_inode) > 0)
3292 rc = mds_orphan_add_link(rec, obd, de_new);
3295 GOTO(cleanup, rc = 0);
3297 if (!S_ISREG(new_inode->i_mode))
3300 if (!(body->valid & OBD_MD_FLEASIZE)) {
3301 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
3302 OBD_MD_FLATIME | OBD_MD_FLMTIME);
3303 } else if (mds_log_op_unlink(obd, new_inode,
3304 lustre_msg_buf(req->rq_repmsg,1,0),
3305 req->rq_repmsg->buflens[1],
3306 lustre_msg_buf(req->rq_repmsg,2,0),
3307 req->rq_repmsg->buflens[2],
3309 body->valid |= OBD_MD_FLCOOKIE;
3315 rc = mds_finish_transno(mds, (de_tgtdir ? de_tgtdir->d_inode : NULL),
3316 handle, req, rc, 0);
3318 switch (cleanup_phase) {
3320 up(&mds->mds_pending_dir->d_inode->i_sem);
3323 UP_READ_I_ALLOC_SEM(new_inode);
3326 if (dlm_handles[5].cookie != 0)
3327 ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
3328 if (dlm_handles[6].cookie != 0)
3329 ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
3332 ptlrpc_save_llog_lock(req, lcl);
3335 if (dlm_handles[3].cookie != 0)
3336 ldlm_lock_decref(&(dlm_handles[3]), LCK_EX);
3337 ldlm_lock_decref(&(dlm_handles[2]), LCK_EX);
3338 ldlm_lock_decref(&(dlm_handles[1]), LCK_PW);
3339 ldlm_lock_decref(&(dlm_handles[0]), LCK_PW);
3341 if (dlm_handles[3].cookie != 0)
3342 ptlrpc_save_lock(req,&(dlm_handles[3]), LCK_EX);
3343 ptlrpc_save_lock(req, &(dlm_handles[2]), LCK_EX);
3344 ptlrpc_save_lock(req, &(dlm_handles[1]), LCK_PW);
3345 ptlrpc_save_lock(req, &(dlm_handles[0]), LCK_PW);
3354 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
3357 req->rq_status = rc;
3361 typedef int (*mds_reinter)(struct mds_update_record *, int offset,
3362 struct ptlrpc_request *, struct lustre_handle *);
3364 static mds_reinter reinters[REINT_MAX + 1] = {
3365 [REINT_SETATTR] mds_reint_setattr,
3366 [REINT_CREATE] mds_reint_create,
3367 [REINT_LINK] mds_reint_link,
3368 [REINT_UNLINK] mds_reint_unlink,
3369 [REINT_RENAME] mds_reint_rename,
3370 [REINT_OPEN] mds_open
3373 int mds_reint_rec(struct mds_update_record *rec, int offset,
3374 struct ptlrpc_request *req, struct lustre_handle *lockh)
3376 struct obd_device *obd = req->rq_export->exp_obd;
3377 struct lvfs_run_ctxt saved;
3380 /* checked by unpacker */
3381 LASSERT(rec->ur_opcode <= REINT_MAX &&
3382 reinters[rec->ur_opcode] != NULL);
3384 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
3385 rc = reinters[rec->ur_opcode] (rec, offset, req, lockh);
3386 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);