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_dt_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_dt_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 char str[PTL_NALFMT_SIZE];
283 struct list_head *tmp;
284 struct ptlrpc_reply_state *oldrep;
285 struct ptlrpc_service *svc;
286 struct llog_create_locks *lcl;
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
309 " o%d NID %s\n", oldrep->rs_nlocks, oldrep,
310 oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_msg.opc,
311 ptlrpc_peernid2str(&exp->exp_connection->c_peer, str));
313 for (i = 0; i < oldrep->rs_nlocks; i++)
314 ptlrpc_save_lock(req,
315 &oldrep->rs_locks[i],
316 oldrep->rs_modes[i]);
317 oldrep->rs_nlocks = 0;
319 lcl = oldrep->rs_llog_locks;
320 oldrep->rs_llog_locks = NULL;
322 ptlrpc_save_llog_lock(req, lcl);
324 DEBUG_REQ(D_HA, req, "stole locks for");
325 ptlrpc_schedule_difficult_reply (oldrep);
327 spin_unlock (&svc->srv_lock);
328 spin_unlock_irqrestore (&exp->exp_lock, flags);
331 spin_unlock_irqrestore (&exp->exp_lock, flags);
334 void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd)
336 DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
337 mcd->mcd_last_transno, mcd->mcd_last_result);
338 req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_transno;
339 req->rq_repmsg->status = req->rq_status = mcd->mcd_last_result;
341 mds_steal_ack_locks(req);
344 static void reconstruct_reint_setattr(struct mds_update_record *rec,
345 int offset, struct ptlrpc_request *req)
347 struct mds_export_data *med = &req->rq_export->exp_mds_data;
348 struct mds_body *body;
351 mds_req_from_mcd(req, med->med_mcd);
353 de = mds_id2dentry(req2obd(req), rec->ur_id1, NULL);
355 LASSERT(PTR_ERR(de) == req->rq_status);
359 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
360 mds_pack_inode2body(req2obd(req), body, de->d_inode, 1);
362 /* Don't return OST-specific attributes if we didn't just set them */
363 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
364 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
365 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
366 body->valid |= OBD_MD_FLMTIME;
367 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
368 body->valid |= OBD_MD_FLATIME;
373 /* In the raw-setattr case, we lock the child inode.
374 * In the write-back case or if being called from open, the client holds a lock
377 * We use the ATTR_FROM_OPEN flag to tell these cases apart. */
378 static int mds_reint_setattr(struct mds_update_record *rec, int offset,
379 struct ptlrpc_request *req, struct lustre_handle *lh)
381 struct mds_obd *mds = mds_req2mds(req);
382 struct obd_device *obd = req->rq_export->exp_obd;
383 struct mds_body *body;
385 struct inode *inode = NULL;
386 struct lustre_handle lockh[2] = {{0}, {0}};
389 struct mds_logcancel_data *mlcd = NULL;
390 int rc = 0, cleanup_phase = 0, err;
394 LASSERT(offset == 1);
396 DEBUG_REQ(D_INODE, req, "setattr "LPU64"/%u %x",
397 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
398 rec->ur_iattr.ia_valid);
400 MDS_CHECK_RESENT(req, reconstruct_reint_setattr(rec, offset, req));
401 MD_COUNTER_INCREMENT(obd, setattr);
403 if (rec->ur_iattr.ia_valid & ATTR_FROM_OPEN) {
404 de = mds_id2dentry(obd, rec->ur_id1, NULL);
406 GOTO(cleanup, rc = PTR_ERR(de));
408 __u64 lockpart = MDS_INODELOCK_UPDATE;
409 if (rec->ur_iattr.ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID))
410 lockpart |= MDS_INODELOCK_LOOKUP;
411 de = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW,
412 lockh, &parent_mode, NULL, 0, lockpart);
414 GOTO(cleanup, rc = PTR_ERR(de));
422 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
423 rec->ur_eadata != NULL)
426 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb);
428 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
430 GOTO(cleanup, rc = PTR_ERR(handle));
432 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
433 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n",
434 LTIME_S(rec->ur_iattr.ia_mtime),
435 LTIME_S(rec->ur_iattr.ia_ctime));
436 rc = mds_fix_attr(inode, rec);
440 if (rec->ur_iattr.ia_valid & ATTR_ATTR_FLAG) /* ioctl */
441 rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_SETFLAGS,
442 (long)&rec->ur_iattr.ia_attr_flags);
444 rc = fsfilt_setattr(obd, de, handle, &rec->ur_iattr, 0);
446 if (rc == 0 && (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
447 rec->ur_eadata != NULL) {
448 struct lov_stripe_md *lsm = NULL;
450 rc = ll_permission(inode, MAY_WRITE, NULL);
454 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE, mds->mds_dt_exp,
455 0, &lsm, rec->ur_eadata);
459 obd_free_memmd(mds->mds_dt_exp, &lsm);
461 rc = fsfilt_set_md(obd, inode, handle, rec->ur_eadata,
467 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
468 mds_pack_inode2body(obd, body, inode, 1);
470 /* Don't return OST-specific attributes if we didn't just set them */
471 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
472 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
473 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
474 body->valid |= OBD_MD_FLMTIME;
475 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
476 body->valid |= OBD_MD_FLATIME;
478 if (rc == 0 && rec->ur_cookielen && !IS_ERR(mds->mds_dt_obd)) {
479 OBD_ALLOC(mlcd, sizeof(*mlcd) + rec->ur_cookielen +
482 mlcd->mlcd_size = sizeof(*mlcd) + rec->ur_cookielen +
484 mlcd->mlcd_eadatalen = rec->ur_eadatalen;
485 mlcd->mlcd_cookielen = rec->ur_cookielen;
486 mlcd->mlcd_lmm = (void *)&mlcd->mlcd_cookies +
487 mlcd->mlcd_cookielen;
488 memcpy(&mlcd->mlcd_cookies, rec->ur_logcookies,
489 mlcd->mlcd_cookielen);
490 memcpy(mlcd->mlcd_lmm, rec->ur_eadata,
491 mlcd->mlcd_eadatalen);
493 CERROR("unable to allocate log cancel data\n");
499 fsfilt_add_journal_cb(req->rq_export->exp_obd, mds->mds_sb, 0,
500 handle, mds_cancel_cookies_cb, mlcd);
501 err = mds_finish_transno(mds, inode, handle, req, rc, 0);
502 switch (cleanup_phase) {
504 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
505 rec->ur_eadata != NULL)
510 if (lockh[1].cookie != 0)
511 ldlm_lock_decref(lockh + 1, parent_mode);
514 ldlm_lock_decref(lockh, LCK_PW);
516 ptlrpc_save_lock (req, lockh, LCK_PW);
531 static void reconstruct_reint_create(struct mds_update_record *rec, int offset,
532 struct ptlrpc_request *req)
534 struct mds_export_data *med = &req->rq_export->exp_mds_data;
535 struct dentry *parent, *child;
536 struct mds_body *body;
539 mds_req_from_mcd(req, med->med_mcd);
541 if (req->rq_status) {
546 parent = mds_id2dentry(req2obd(req), rec->ur_id1, NULL);
547 LASSERT(!IS_ERR(parent));
548 child = ll_lookup_one_len(rec->ur_name, parent,
549 rec->ur_namelen - 1);
550 LASSERT(!IS_ERR(child));
551 if ((child->d_flags & DCACHE_CROSS_REF)) {
552 LASSERTF(child->d_inode == NULL, "BUG 3869\n");
553 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
554 mds_pack_dentry2body(req2obd(req), body, child, 1);
555 } else if (child->d_inode == NULL) {
556 DEBUG_REQ(D_ERROR, req, "parent "DLID4" name %s mode %o",
557 OLID4(rec->ur_id1), rec->ur_name, rec->ur_mode);
558 LASSERTF(child->d_inode != NULL, "BUG 3869\n");
560 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
561 mds_pack_inode2body(req2obd(req), body, child->d_inode, 1);
568 static int mds_reint_create(struct mds_update_record *rec, int offset,
569 struct ptlrpc_request *req,
570 struct lustre_handle *lh)
572 struct dentry *dparent = NULL;
573 struct mds_obd *mds = mds_req2mds(req);
574 struct obd_device *obd = req->rq_export->exp_obd;
575 struct dentry *dchild = NULL;
576 struct inode *dir = NULL;
578 struct lustre_handle lockh[2] = {{0}, {0}};
580 int rc = 0, err, type = rec->ur_mode & S_IFMT, cleanup_phase = 0;
582 struct dentry_params dp;
583 struct mea *mea = NULL;
587 LASSERT(offset == 1);
589 LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name,
592 DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u name %s mode %o",
593 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
594 rec->ur_name, rec->ur_mode);
596 MDS_CHECK_RESENT(req, reconstruct_reint_create(rec, offset, req));
598 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
599 GOTO(cleanup, rc = -ESTALE);
601 dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW,
602 lockh, &parent_mode, rec->ur_name,
603 rec->ur_namelen - 1, MDS_INODELOCK_UPDATE);
604 if (IS_ERR(dparent)) {
605 rc = PTR_ERR(dparent);
606 CERROR("parent lookup error %d\n", rc);
609 cleanup_phase = 1; /* locked parent dentry */
610 dir = dparent->d_inode;
613 ldlm_lock_dump_handle(D_OTHER, lockh);
615 /* try to retrieve MEA data for this dir */
616 rc = mds_md_get_attr(obd, dparent->d_inode, &mea, &mea_size);
622 * dir is already splitted, check is requested filename should
623 * live at this MDS or at another one.
625 int i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
626 if (mea->mea_master != id_group(&mea->mea_ids[i])) {
627 CDEBUG(D_OTHER, "inapropriate MDS(%d) for %lu/%u:%s."
628 " should be %lu(%d)\n",
629 mea->mea_master, dparent->d_inode->i_ino,
630 dparent->d_inode->i_generation, rec->ur_name,
631 (unsigned long)id_group(&mea->mea_ids[i]), i);
632 GOTO(cleanup, rc = -ERESTART);
636 dchild = ll_lookup_one_len(rec->ur_name, dparent,
637 rec->ur_namelen - 1);
638 if (IS_ERR(dchild)) {
639 rc = PTR_ERR(dchild);
640 CERROR("Can't find "DLID4"/%s, error %d\n",
641 OLID4(rec->ur_id1), rec->ur_name, rc);
645 cleanup_phase = 2; /* child dentry */
647 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb);
649 if (type == S_IFREG || type == S_IFDIR) {
650 rc = mds_try_to_split_dir(obd, dparent, &mea, 0, parent_mode);
651 CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d/%d\n",
652 obd->obd_name, dparent->d_inode->i_ino,
653 dparent->d_inode->i_generation, rc, parent_mode);
655 /* dir got splitted */
656 GOTO(cleanup, rc = -ERESTART);
658 /* error happened during spitting. */
663 if (dir->i_mode & S_ISGID) {
664 if (S_ISDIR(rec->ur_mode))
665 rec->ur_mode |= S_ISGID;
669 * here inode number should be used only in the case of replaying. It is
670 * needed to check if object already created in the case of creating
673 dchild->d_fsdata = (void *)&dp;
674 dp.p_inum = (unsigned long)id_ino(rec->ur_id2);
679 handle = fsfilt_start(obd, dir, FSFILT_OP_CREATE, NULL);
681 GOTO(cleanup, rc = PTR_ERR(handle));
682 rc = ll_vfs_create(dir, dchild, rec->ur_mode, NULL);
690 * as Peter asked, mkdir() should distribute new directories
691 * over the whole cluster in order to distribute namespace
692 * processing load. first, we calculate which MDS to use to put
693 * new directory's inode in.
695 i = mds_choose_mdsnum(obd, rec->ur_name, rec->ur_namelen - 1,
697 if (i == mds->mds_num) {
698 /* inode will be created locally */
699 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
701 GOTO(cleanup, rc = PTR_ERR(handle));
703 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
705 CERROR("Can't create dir \"%s\", rc = %d\n",
706 dchild->d_name.name, rc);
710 down(&dchild->d_inode->i_sem);
712 rc = mds_update_inode_sid(obd, dchild->d_inode,
713 handle, rec->ur_id2);
715 CERROR("mds_update_inode_sid() failed, inode %lu, "
716 "rc %d\n", dchild->d_inode->i_ino, rc);
720 * make sure, that fid is up-to-date.
722 mds_set_last_fid(obd, id_fid(rec->ur_id2));
724 rc = mds_alloc_inode_sid(obd, dchild->d_inode,
727 CERROR("mds_alloc_inode_sid() failed, inode %lu, "
728 "rc %d\n", dchild->d_inode->i_ino, rc);
731 up(&dchild->d_inode->i_sem);
737 nstripes = *(u16 *)rec->ur_eadata;
739 if (rc == 0 && nstripes) {
741 * we pass LCK_EX to split routine to signal,
742 * that we have exclusive access to the
743 * directory. Simple because nobody knows it
744 * already exists -bzzz
746 rc = mds_try_to_split_dir(obd, dchild,
750 /* dir got splitted */
753 /* an error occured during
758 } else if (!DENTRY_VALID(dchild)) {
759 /* inode will be created on another MDS */
760 struct obdo *oa = NULL;
761 struct mds_body *body;
763 /* first, create that inode */
766 GOTO(cleanup, rc = -ENOMEM);
771 if (rec->ur_eadata) {
772 /* user asks for creating splitted dir */
773 oa->o_easize = *((u16 *) rec->ur_eadata);
776 obdo_from_inode(oa, dir, OBD_MD_FLTYPE | OBD_MD_FLATIME |
777 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
778 OBD_MD_FLUID | OBD_MD_FLGID);
780 oa->o_mode = dir->i_mode;
782 CDEBUG(D_OTHER, "%s: create dir on MDS %u\n",
785 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
787 * here inode number and generation are
788 * important, as this is replay request and we
789 * need them to check if such an object is
792 CDEBUG(D_HA, "%s: replay dir creation %*s -> %u/%u\n",
793 obd->obd_name, rec->ur_namelen - 1,
794 rec->ur_name, (unsigned)id_ino(rec->ur_id2),
795 (unsigned)id_gen(rec->ur_id2));
796 oa->o_id = id_ino(rec->ur_id2);
797 oa->o_fid = id_fid(rec->ur_id2);
798 oa->o_generation = id_gen(rec->ur_id2);
799 oa->o_flags |= OBD_FL_RECREATE_OBJS;
802 * fid should be defined here. It should be
805 LASSERT(oa->o_fid != 0);
809 * before obd_create() is called, o_fid is not known if
810 * this is not recovery of cause.
812 rc = obd_create(mds->mds_md_exp, oa, NULL, NULL);
814 CERROR("can't create remote inode: %d\n", rc);
815 DEBUG_REQ(D_ERROR, req, "parent "LPU64"/%u name %s mode %o",
816 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
817 rec->ur_name, rec->ur_mode);
822 LASSERT(oa->o_fid != 0);
824 /* now, add new dir entry for it */
825 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
826 if (IS_ERR(handle)) {
828 GOTO(cleanup, rc = PTR_ERR(handle));
831 /* creating local dentry for remote inode. */
832 rc = fsfilt_add_dir_entry(obd, dparent, rec->ur_name,
833 rec->ur_namelen - 1, oa->o_id,
834 oa->o_generation, i, oa->o_fid);
837 CERROR("Can't create local entry %*s for "
838 "remote inode.\n", rec->ur_namelen - 1,
844 body = lustre_msg_buf(req->rq_repmsg,
846 body->valid |= OBD_MD_FLID | OBD_MD_MDS | OBD_MD_FID;
848 obdo2id(&body->id1, oa);
851 /* requested name exists in the directory */
858 handle = fsfilt_start(obd, dir, FSFILT_OP_SYMLINK, NULL);
860 GOTO(cleanup, rc = PTR_ERR(handle));
861 if (rec->ur_tgt == NULL) /* no target supplied */
862 rc = -EINVAL; /* -EPROTO? */
864 rc = ll_vfs_symlink(dir, dchild, rec->ur_tgt, S_IALLUGO);
872 int rdev = rec->ur_rdev;
873 handle = fsfilt_start(obd, dir, FSFILT_OP_MKNOD, NULL);
875 GOTO(cleanup, (handle = NULL, rc = PTR_ERR(handle)));
876 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
881 CERROR("bad file type %o creating %s\n", type, rec->ur_name);
882 dchild->d_fsdata = NULL;
883 GOTO(cleanup, rc = -EINVAL);
886 /* In case we stored the desired inum in here, we want to clean up. */
887 if (dchild->d_fsdata == (void *)(unsigned long)id_ino(rec->ur_id2))
888 dchild->d_fsdata = NULL;
891 CDEBUG(D_INODE, "error during create: %d\n", rc);
893 } else if (dchild->d_inode) {
895 struct mds_body *body;
896 struct inode *inode = dchild->d_inode;
899 iattr.ia_uid = rec->ur_fsuid;
900 LTIME_S(iattr.ia_atime) = rec->ur_time;
901 LTIME_S(iattr.ia_ctime) = rec->ur_time;
902 LTIME_S(iattr.ia_mtime) = rec->ur_time;
904 if (dir->i_mode & S_ISGID)
905 iattr.ia_gid = dir->i_gid;
907 iattr.ia_gid = rec->ur_fsgid;
909 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
910 ATTR_MTIME | ATTR_CTIME;
912 if (id_ino(rec->ur_id2)) {
913 LASSERT(id_ino(rec->ur_id2) == inode->i_ino);
914 inode->i_generation = id_gen(rec->ur_id2);
916 if (type != S_IFDIR) {
918 * updating inode self id, as inode already
919 * exists and we should make sure, its sid will
920 * be the same as we reveived.
923 rc = mds_update_inode_sid(obd, inode,
924 handle, rec->ur_id2);
927 CERROR("Can't update inode self id, "
932 * make sure, that fid is up-to-date.
934 mds_set_last_fid(obd, id_fid(rec->ur_id2));
937 /* dirtied and committed by the upcoming setattr. */
938 CDEBUG(D_INODE, "recreated ino %lu with gen %u\n",
939 inode->i_ino, inode->i_generation);
941 struct lustre_handle child_ino_lockh;
943 CDEBUG(D_INODE, "created ino %lu with gen %x\n",
944 inode->i_ino, inode->i_generation);
946 if (type != S_IFDIR) {
948 * allocate new id for @inode if it is not dir,
949 * because for dir it was already done.
952 rc = mds_alloc_inode_sid(obd, inode,
956 CERROR("mds_alloc_inode_sid() failed, "
957 "inode %lu, rc %d\n", inode->i_ino,
964 * the inode we were allocated may have just
965 * been freed by an unlink operation. We take
966 * this lock to synchronize against the matching
967 * reply-ack-lock taken in unlink, to avoid
968 * replay problems if this reply makes it out to
969 * the client but the unlink's does not. See
970 * bug 2029 for more detail.
972 rc = mds_lock_new_child(obd, inode, &child_ino_lockh);
973 if (rc != ELDLM_OK) {
974 CERROR("error locking for unlink/create sync: "
977 ldlm_lock_decref(&child_ino_lockh, LCK_EX);
982 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
984 CERROR("error on child setattr: rc = %d\n", rc);
986 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
987 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
989 CERROR("error on parent setattr: rc = %d\n", rc);
991 MD_COUNTER_INCREMENT(obd, create);
993 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
994 mds_pack_inode2body(obd, body, inode, 1);
999 err = mds_finish_transno(mds, dir, handle, req, rc, 0);
1001 if (rc && created) {
1002 /* Destroy the file we just created. This should not need extra
1003 * journal credits, as we have already modified all of the
1004 * blocks needed in order to create the file in the first
1008 err = vfs_rmdir(dir, dchild);
1010 CERROR("rmdir in error path: %d\n", err);
1013 err = vfs_unlink(dir, dchild);
1015 CERROR("unlink in error path: %d\n", err);
1021 switch (cleanup_phase) {
1022 case 2: /* child dentry */
1024 case 1: /* locked parent dentry */
1026 if (lockh[1].cookie != 0)
1027 ldlm_lock_decref(lockh + 1, parent_mode);
1030 ldlm_lock_decref(lockh, LCK_PW);
1032 ptlrpc_save_lock(req, lockh, LCK_PW);
1038 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1042 OBD_FREE(mea, mea_size);
1043 req->rq_status = rc;
1048 res_gt(struct ldlm_res_id *res1, struct ldlm_res_id *res2,
1049 ldlm_policy_data_t *p1, ldlm_policy_data_t *p2)
1053 for (i = 0; i < RES_NAME_SIZE; i++) {
1055 * this is needed to make zeroed res_id entries to be put at the
1056 * end of list in *ordered_locks() .
1058 if (res1->name[i] == 0 && res2->name[i] != 0)
1060 if (res2->name[i] == 0 && res1->name[i] != 0)
1062 if (res1->name[i] > res2->name[i])
1064 if (res1->name[i] < res2->name[i])
1071 if (memcmp(p1, p2, sizeof(*p1)) < 0)
1077 /* This function doesn't use ldlm_match_or_enqueue because we're always called
1078 * with EX or PW locks, and the MDS is no longer allowed to match write locks,
1079 * because they take the place of local semaphores.
1081 * One or two locks are taken in numerical order. A res_id->name[0] of 0 means
1082 * no lock is taken for that res_id. Must be at least one non-zero res_id. */
1083 int enqueue_ordered_locks(struct obd_device *obd, struct ldlm_res_id *p1_res_id,
1084 struct lustre_handle *p1_lockh, int p1_lock_mode,
1085 ldlm_policy_data_t *p1_policy,
1086 struct ldlm_res_id *p2_res_id,
1087 struct lustre_handle *p2_lockh, int p2_lock_mode,
1088 ldlm_policy_data_t *p2_policy)
1090 int lock_modes[2] = { p1_lock_mode, p2_lock_mode };
1091 struct ldlm_res_id *res_id[2] = { p1_res_id, p2_res_id };
1092 struct lustre_handle *handles[2] = { p1_lockh, p2_lockh };
1093 ldlm_policy_data_t *policies[2] = { p1_policy, p2_policy };
1097 LASSERT(p1_res_id != NULL && p2_res_id != NULL);
1099 CDEBUG(D_INFO, "locks before: "LPU64"/"LPU64"\n",
1100 res_id[0]->name[0], res_id[1]->name[0]);
1102 if (res_gt(p1_res_id, p2_res_id, p1_policy, p2_policy)) {
1103 handles[1] = p1_lockh;
1104 handles[0] = p2_lockh;
1105 res_id[1] = p1_res_id;
1106 res_id[0] = p2_res_id;
1107 lock_modes[1] = p1_lock_mode;
1108 lock_modes[0] = p2_lock_mode;
1109 policies[1] = p1_policy;
1110 policies[0] = p2_policy;
1113 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"\n",
1114 res_id[0]->name[0], res_id[1]->name[0]);
1116 flags = LDLM_FL_LOCAL_ONLY;
1117 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, *res_id[0],
1118 LDLM_IBITS, policies[0], lock_modes[0], &flags,
1119 mds_blocking_ast, ldlm_completion_ast, NULL, NULL,
1120 NULL, 0, NULL, handles[0]);
1123 ldlm_lock_dump_handle(D_OTHER, handles[0]);
1125 if (!memcmp(res_id[0], res_id[1], sizeof(*res_id[0])) &&
1126 (policies[0]->l_inodebits.bits & policies[1]->l_inodebits.bits)) {
1127 memcpy(handles[1], handles[0], sizeof(*(handles[1])));
1128 ldlm_lock_addref(handles[1], lock_modes[1]);
1129 } else if (res_id[1]->name[0] != 0) {
1130 flags = LDLM_FL_LOCAL_ONLY;
1131 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1132 *res_id[1], LDLM_IBITS, policies[1],
1133 lock_modes[1], &flags, mds_blocking_ast,
1134 ldlm_completion_ast, NULL, NULL, NULL, 0,
1136 if (rc != ELDLM_OK) {
1137 ldlm_lock_decref(handles[0], lock_modes[0]);
1140 ldlm_lock_dump_handle(D_OTHER, handles[1]);
1146 int enqueue_4ordered_locks(struct obd_device *obd,struct ldlm_res_id *p1_res_id,
1147 struct lustre_handle *p1_lockh, int p1_lock_mode,
1148 ldlm_policy_data_t *p1_policy,
1149 struct ldlm_res_id *p2_res_id,
1150 struct lustre_handle *p2_lockh, int p2_lock_mode,
1151 ldlm_policy_data_t *p2_policy,
1152 struct ldlm_res_id *c1_res_id,
1153 struct lustre_handle *c1_lockh, int c1_lock_mode,
1154 ldlm_policy_data_t *c1_policy,
1155 struct ldlm_res_id *c2_res_id,
1156 struct lustre_handle *c2_lockh, int c2_lock_mode,
1157 ldlm_policy_data_t *c2_policy)
1159 struct ldlm_res_id *res_id[5] = { p1_res_id, p2_res_id,
1160 c1_res_id, c2_res_id };
1161 struct lustre_handle *dlm_handles[5] = { p1_lockh, p2_lockh,
1162 c1_lockh, c2_lockh };
1163 int lock_modes[5] = { p1_lock_mode, p2_lock_mode,
1164 c1_lock_mode, c2_lock_mode };
1165 ldlm_policy_data_t *policies[5] = { p1_policy, p2_policy,
1166 c1_policy, c2_policy};
1167 int rc, i, j, sorted, flags;
1170 CDEBUG(D_DLMTRACE, "locks before: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1171 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1172 res_id[3]->name[0]);
1175 * simple insertion sort - we have at most 4 elements. Note, that zeroed
1176 * res_id should be at the end of list after sorting is finished.
1178 for (i = 1; i < 4; i++) {
1180 dlm_handles[4] = dlm_handles[i];
1181 res_id[4] = res_id[i];
1182 lock_modes[4] = lock_modes[i];
1183 policies[4] = policies[i];
1187 if (res_gt(res_id[j], res_id[4], policies[j],
1189 dlm_handles[j + 1] = dlm_handles[j];
1190 res_id[j + 1] = res_id[j];
1191 lock_modes[j + 1] = lock_modes[j];
1192 policies[j + 1] = policies[j];
1197 } while (j >= 0 && !sorted);
1199 dlm_handles[j + 1] = dlm_handles[4];
1200 res_id[j + 1] = res_id[4];
1201 lock_modes[j + 1] = lock_modes[4];
1202 policies[j + 1] = policies[4];
1205 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1206 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1207 res_id[3]->name[0]);
1209 /* XXX we could send ASTs on all these locks first before blocking? */
1210 for (i = 0; i < 4; i++) {
1214 * nevertheless zeroed res_ids should be at the end of list, and
1215 * could use break here, I think, that it is more correctly for
1216 * clear understanding of code to have continue here, as it
1217 * clearly means, that zeroed res_id should be skipped and does
1218 * not mean, that if we meet zeroed res_id we should stop
1221 if (res_id[i]->name[0] == 0)
1225 !memcmp(res_id[i], res_id[i-1], sizeof(*res_id[i])) &&
1226 (policies[i]->l_inodebits.bits &
1227 policies[i-1]->l_inodebits.bits) ) {
1228 memcpy(dlm_handles[i], dlm_handles[i-1],
1229 sizeof(*(dlm_handles[i])));
1230 ldlm_lock_addref(dlm_handles[i], lock_modes[i]);
1232 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1233 *res_id[i], LDLM_IBITS,
1235 lock_modes[i], &flags,
1237 ldlm_completion_ast, NULL, NULL,
1238 NULL, 0, NULL, dlm_handles[i]);
1240 GOTO(out_err, rc = -EIO);
1241 ldlm_lock_dump_handle(D_OTHER, dlm_handles[i]);
1248 ldlm_lock_decref(dlm_handles[i], lock_modes[i]);
1253 /* In the unlikely case that the child changed while we were waiting
1254 * on the lock, we need to drop the lock on the old child and either:
1255 * - if the child has a lower resource name, then we have to also
1256 * drop the parent lock and regain the locks in the right order
1257 * - in the rename case, if the child has a lower resource name than one of
1258 * the other parent/child resources (maxres) we also need to reget the locks
1259 * - if the child has a higher resource name (this is the common case)
1260 * we can just get the lock on the new child (still in lock order)
1262 * Returns 0 if the child did not change or if it changed but could be locked.
1263 * Returns 1 if the child changed and we need to re-lock (no locks held).
1264 * Returns -ve error with a valid dchild (no locks held). */
1265 static int mds_verify_child(struct obd_device *obd,
1266 struct ldlm_res_id *parent_res_id,
1267 struct lustre_handle *parent_lockh,
1268 struct dentry *dparent, int parent_mode,
1269 struct ldlm_res_id *child_res_id,
1270 struct lustre_handle *child_lockh,
1271 struct dentry **dchildp, int child_mode,
1272 ldlm_policy_data_t *child_policy,
1273 const char *name, int namelen,
1274 struct ldlm_res_id *maxres)
1276 struct dentry *vchild, *dchild = *dchildp;
1277 int rc = 0, cleanup_phase = 2; /* parent, child locks */
1278 struct lustre_id sid;
1281 vchild = ll_lookup_one_len(name, dparent, namelen - 1);
1283 GOTO(cleanup, rc = PTR_ERR(vchild));
1285 if ((vchild->d_flags & DCACHE_CROSS_REF)) {
1287 * cross-ref case, comparing child res_id with values stored in
1290 id_fid(&sid) = vchild->d_fid;
1291 id_group(&sid) = vchild->d_mdsnum;
1293 if (child_res_id->name[0] != id_fid(&sid) ||
1294 child_res_id->name[1] != id_group(&sid))
1299 if (vchild->d_inode != NULL) {
1301 * name found and child res_id is not zero, getting
1302 * inode fid and compare it with child res_id.
1304 down(&vchild->d_inode->i_sem);
1305 rc = mds_read_inode_sid(obd, vchild->d_inode, &sid);
1306 up(&vchild->d_inode->i_sem);
1308 CERROR("Can't read inode self id, inode %lu,"
1309 " rc %d\n", vchild->d_inode->i_ino, rc);
1313 if (child_res_id->name[0] != id_fid(&sid) ||
1314 child_res_id->name[1] != id_group(&sid))
1327 /* child inode is chnaged, analizing it. */
1328 CDEBUG(D_DLMTRACE, "child inode changed: %p != %p (%lu != "LPU64")\n",
1329 vchild->d_inode, dchild ? dchild->d_inode : 0,
1330 vchild->d_inode ? vchild->d_inode->i_ino : 0,
1331 child_res_id->name[0]);
1333 if (child_res_id->name[0] != 0)
1334 ldlm_lock_decref(child_lockh, child_mode);
1338 cleanup_phase = 1; /* parent lock only */
1339 *dchildp = dchild = vchild;
1341 if (dchild->d_inode || (dchild->d_flags & DCACHE_CROSS_REF)) {
1344 child_res_id->name[0] = id_fid(&sid);
1345 child_res_id->name[1] = id_group(&sid);
1347 if (res_gt(parent_res_id, child_res_id, NULL, NULL) ||
1348 res_gt(maxres, child_res_id, NULL, NULL)) {
1349 CDEBUG(D_DLMTRACE, "relock "LPU64"<("LPU64"|"LPU64")\n",
1350 child_res_id->name[0], parent_res_id->name[0],
1352 GOTO(cleanup, rc = 1);
1355 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1356 *child_res_id, LDLM_IBITS, child_policy,
1357 child_mode, &flags, mds_blocking_ast,
1358 ldlm_completion_ast, NULL, NULL, NULL, 0,
1361 GOTO(cleanup, rc = -EIO);
1364 memset(child_res_id, 0, sizeof(*child_res_id));
1370 switch(cleanup_phase) {
1372 if (child_res_id->name[0] != 0)
1373 ldlm_lock_decref(child_lockh, child_mode);
1375 ldlm_lock_decref(parent_lockh, parent_mode);
1381 int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds,
1382 struct lustre_id *id,
1383 struct lustre_handle *parent_lockh,
1384 struct dentry **dparentp, int parent_mode,
1385 __u64 parent_lockpart, int *update_mode,
1386 char *name, int namelen,
1387 struct lustre_handle *child_lockh,
1388 struct dentry **dchildp, int child_mode,
1389 __u64 child_lockpart)
1391 ldlm_policy_data_t parent_policy = {.l_inodebits = { parent_lockpart }};
1392 ldlm_policy_data_t child_policy = {.l_inodebits = { child_lockpart }};
1393 struct ldlm_res_id parent_res_id = { .name = {0} };
1394 struct ldlm_res_id child_res_id = { .name = {0} };
1395 int rc = 0, cleanup_phase = 0;
1396 struct lustre_id sid;
1397 struct inode *inode;
1400 /* Step 1: Lookup parent */
1401 *dparentp = mds_id2dentry(obd, id, NULL);
1402 if (IS_ERR(*dparentp)) {
1403 rc = PTR_ERR(*dparentp);
1408 CDEBUG(D_INODE, "parent ino %lu, name %s\n",
1409 (*dparentp)->d_inode->i_ino, name);
1411 parent_res_id.name[0] = id_fid(id);
1412 parent_res_id.name[1] = id_group(id);
1415 parent_lockh[1].cookie = 0;
1416 if (name && IS_PDIROPS((*dparentp)->d_inode)) {
1417 struct ldlm_res_id res_id = { .name = {0} };
1418 ldlm_policy_data_t policy;
1421 *update_mode = mds_lock_mode_for_dir(obd, *dparentp, parent_mode);
1423 res_id.name[0] = id_fid(id);
1424 res_id.name[1] = id_group(id);
1425 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1427 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1428 res_id, LDLM_IBITS, &policy,
1429 *update_mode, &flags,
1431 ldlm_completion_ast,
1432 NULL, NULL, NULL, 0, NULL,
1438 parent_res_id.name[2] = full_name_hash(name, namelen - 1);
1440 CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n",
1441 (unsigned long)id_fid(id), (unsigned long)id_group(id),
1442 parent_res_id.name[2]);
1446 cleanup_phase = 1; /* parent dentry */
1448 /* Step 2: Lookup child (without DLM lock, to get resource name) */
1449 *dchildp = ll_lookup_one_len(name, *dparentp, namelen - 1);
1450 if (IS_ERR(*dchildp)) {
1451 rc = PTR_ERR(*dchildp);
1452 CDEBUG(D_INODE, "child lookup error %d\n", rc);
1456 if ((*dchildp)->d_flags & DCACHE_CROSS_REF) {
1458 * inode lives on another MDS: return * fid/mdsnum and LOOKUP
1459 * lock. Drop possible UPDATE lock!
1461 child_policy.l_inodebits.bits &= ~MDS_INODELOCK_UPDATE;
1462 child_policy.l_inodebits.bits |= MDS_INODELOCK_LOOKUP;
1464 child_res_id.name[0] = (*dchildp)->d_fid;
1465 child_res_id.name[1] = (*dchildp)->d_mdsnum;
1469 inode = (*dchildp)->d_inode;
1471 inode = igrab(inode);
1475 down(&inode->i_sem);
1476 rc = mds_read_inode_sid(obd, inode, &sid);
1479 CERROR("Can't read inode self id, inode %lu, "
1480 "rc %d\n", inode->i_ino, rc);
1485 child_res_id.name[0] = id_fid(&sid);
1486 child_res_id.name[1] = id_group(&sid);
1490 cleanup_phase = 2; /* child dentry */
1492 /* Step 3: Lock parent and child in resource order. If child doesn't
1493 * exist, we still have to lock the parent and re-lookup. */
1494 rc = enqueue_ordered_locks(obd, &parent_res_id, parent_lockh, parent_mode,
1495 &parent_policy, &child_res_id, child_lockh,
1496 child_mode, &child_policy);
1500 if ((*dchildp)->d_inode || ((*dchildp)->d_flags & DCACHE_CROSS_REF))
1501 cleanup_phase = 4; /* child lock */
1503 cleanup_phase = 3; /* parent lock */
1505 /* Step 4: Re-lookup child to verify it hasn't changed since locking */
1506 rc = mds_verify_child(obd, &parent_res_id, parent_lockh, *dparentp,
1507 parent_mode, &child_res_id, child_lockh,
1508 dchildp, child_mode, &child_policy,
1509 name, namelen, &parent_res_id);
1520 switch (cleanup_phase) {
1522 ldlm_lock_decref(child_lockh, child_mode);
1524 ldlm_lock_decref(parent_lockh, parent_mode);
1529 if (parent_lockh[1].cookie)
1530 ldlm_lock_decref(parent_lockh + 1, *update_mode);
1538 void mds_reconstruct_generic(struct ptlrpc_request *req)
1540 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1541 mds_req_from_mcd(req, med->med_mcd);
1544 /* If we are unlinking an open file/dir (i.e. creating an orphan) then
1545 * we instead link the inode into the PENDING directory until it is
1546 * finally released. We can't simply call mds_reint_rename() or some
1547 * part thereof, because we don't have the inode to check for link
1548 * count/open status until after it is locked.
1550 * For lock ordering, caller must get child->i_sem first, then pending->i_sem
1551 * before starting journal transaction.
1553 * returns 1 on success
1554 * returns 0 if we lost a race and didn't make a new link
1555 * returns negative on error
1557 static int mds_orphan_add_link(struct mds_update_record *rec,
1558 struct obd_device *obd, struct dentry *dentry)
1560 struct mds_obd *mds = &obd->u.mds;
1561 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1562 struct inode *inode = dentry->d_inode;
1563 struct dentry *pending_child;
1564 char idname[LL_ID_NAMELEN];
1565 int idlen = 0, rc, mode;
1568 LASSERT(inode != NULL);
1569 LASSERT(!mds_inode_is_orphan(inode));
1570 #ifndef HAVE_I_ALLOC_SEM
1571 LASSERT(down_trylock(&inode->i_sem) != 0);
1573 LASSERT(down_trylock(&pending_dir->i_sem) != 0);
1575 idlen = ll_id2str(idname, inode->i_ino, inode->i_generation);
1577 CDEBUG(D_INODE, "pending destroy of %dx open %d linked %s %s = %s\n",
1578 mds_orphan_open_count(inode), inode->i_nlink,
1579 S_ISDIR(inode->i_mode) ? "dir" :
1580 S_ISREG(inode->i_mode) ? "file" : "other",
1581 rec->ur_name, idname);
1583 if (mds_orphan_open_count(inode) == 0 || inode->i_nlink != 0)
1586 pending_child = lookup_one_len(idname, mds->mds_pending_dir, idlen);
1587 if (IS_ERR(pending_child))
1588 RETURN(PTR_ERR(pending_child));
1590 if (pending_child->d_inode != NULL) {
1591 CERROR("re-destroying orphan file %s?\n", rec->ur_name);
1592 LASSERT(pending_child->d_inode == inode);
1593 GOTO(out_dput, rc = 0);
1596 /* link() is semanticaly-wrong for S_IFDIR, so we set S_IFREG
1597 * for linking and return real mode back then -bzzz */
1598 mode = inode->i_mode;
1599 inode->i_mode = S_IFREG;
1600 rc = vfs_link(dentry, pending_dir, pending_child);
1602 CERROR("error linking orphan %s to PENDING: rc = %d\n",
1605 mds_inode_set_orphan(inode);
1607 /* return mode and correct i_nlink if inode is directory */
1608 inode->i_mode = mode;
1609 LASSERTF(inode->i_nlink == 1, "%s nlink == %d\n",
1610 S_ISDIR(mode) ? "dir" : S_ISREG(mode) ? "file" : "other",
1612 if (S_ISDIR(mode)) {
1614 pending_dir->i_nlink++;
1615 mark_inode_dirty(inode);
1616 mark_inode_dirty(pending_dir);
1621 l_dput(pending_child);
1625 int mds_create_local_dentry(struct mds_update_record *rec,
1626 struct obd_device *obd)
1628 struct mds_obd *mds = &obd->u.mds;
1629 struct inode *id_dir = mds->mds_id_dir->d_inode;
1630 int idlen = 0, rc, cleanup_phase = 0;
1631 struct dentry *new_child = NULL;
1632 char *idname = rec->ur_name;
1633 struct dentry *child = NULL;
1634 struct lustre_handle lockh[2] = {{0}, {0}};
1635 struct lustre_id sid;
1639 down(&id_dir->i_sem);
1640 idlen = ll_id2str(idname, id_ino(rec->ur_id1),
1641 id_gen(rec->ur_id1));
1643 CDEBUG(D_OTHER, "look for local dentry '%s' for "DLID4"\n",
1644 idname, OLID4(rec->ur_id1));
1646 new_child = ll_lookup_one_len(idname, mds->mds_id_dir,
1649 if (IS_ERR(new_child)) {
1650 CERROR("can't lookup %s: %d\n", idname,
1651 (int) PTR_ERR(new_child));
1652 GOTO(cleanup, rc = PTR_ERR(new_child));
1656 down(&id_dir->i_sem);
1657 rc = mds_read_inode_sid(obd, id_dir, &sid);
1660 CERROR("Can't read inode self id, inode %lu, "
1661 "rc %d\n", id_dir->i_ino, rc);
1665 if (new_child->d_inode != NULL) {
1666 /* nice. we've already have local dentry! */
1667 CDEBUG(D_OTHER, "found dentry in FIDS/: %u/%u\n",
1668 (unsigned)new_child->d_inode->i_ino,
1669 (unsigned)new_child->d_inode->i_generation);
1671 id_ino(rec->ur_id1) = id_dir->i_ino;
1672 id_gen(rec->ur_id1) = id_dir->i_generation;
1673 rec->ur_namelen = idlen + 1;
1675 id_fid(rec->ur_id1) = id_fid(&sid);
1676 id_group(rec->ur_id1) = id_group(&sid);
1678 GOTO(cleanup, rc = 0);
1681 /* new, local dentry will be added soon. we need no aliases here */
1684 if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
1685 child = mds_id2dentry(obd, rec->ur_id1, NULL);
1687 child = mds_id2locked_dentry(obd, rec->ur_id1, NULL,
1688 LCK_EX, lockh, NULL, NULL, 0,
1689 MDS_INODELOCK_UPDATE);
1692 if (IS_ERR(child)) {
1693 rc = PTR_ERR(child);
1694 if (rc != -ENOENT || !(rec->ur_mode & MDS_MODE_REPLAY))
1695 CERROR("can't get victim: %d\n", rc);
1700 handle = fsfilt_start(obd, id_dir, FSFILT_OP_LINK, NULL);
1702 GOTO(cleanup, rc = PTR_ERR(handle));
1704 rc = fsfilt_add_dir_entry(obd, mds->mds_id_dir, idname,
1705 idlen, id_ino(rec->ur_id1),
1706 id_gen(rec->ur_id1), mds->mds_num,
1707 id_fid(rec->ur_id1));
1709 CERROR("error linking orphan %lu/%lu to FIDS: rc = %d\n",
1710 (unsigned long)child->d_inode->i_ino,
1711 (unsigned long)child->d_inode->i_generation, rc);
1713 if (S_ISDIR(child->d_inode->i_mode)) {
1715 mark_inode_dirty(id_dir);
1717 mark_inode_dirty(child->d_inode);
1719 fsfilt_commit(obd, mds->mds_sb, id_dir, handle, 0);
1721 id_ino(rec->ur_id1) = id_dir->i_ino;
1722 id_gen(rec->ur_id1) = id_dir->i_generation;
1723 rec->ur_namelen = idlen + 1;
1725 id_fid(rec->ur_id1) = id_fid(&sid);
1726 id_group(rec->ur_id1) = id_group(&sid);
1730 switch(cleanup_phase) {
1732 if (!(rec->ur_mode & MDS_MODE_DONT_LOCK))
1733 ldlm_lock_decref(lockh, LCK_EX);
1743 static int mds_copy_unlink_reply(struct ptlrpc_request *master,
1744 struct ptlrpc_request *slave)
1746 void *cookie, *cookie2;
1747 struct mds_body *body2;
1748 struct mds_body *body;
1752 body = lustre_msg_buf(slave->rq_repmsg, 0, sizeof(*body));
1753 LASSERT(body != NULL);
1755 body2 = lustre_msg_buf(master->rq_repmsg, 0, sizeof (*body));
1756 LASSERT(body2 != NULL);
1758 if (!(body->valid & (OBD_MD_FLID | OBD_MD_FLGENER)))
1761 memcpy(body2, body, sizeof(*body));
1762 body2->valid &= ~OBD_MD_FLCOOKIE;
1764 if (!(body->valid & OBD_MD_FLEASIZE) &&
1765 !(body->valid & OBD_MD_FLDIREA))
1768 if (body->eadatasize == 0) {
1769 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1773 LASSERT(master->rq_repmsg->buflens[1] >= body->eadatasize);
1775 ea = lustre_msg_buf(slave->rq_repmsg, 1, body->eadatasize);
1776 LASSERT(ea != NULL);
1778 ea2 = lustre_msg_buf(master->rq_repmsg, 1, body->eadatasize);
1779 LASSERT(ea2 != NULL);
1781 memcpy(ea2, ea, body->eadatasize);
1783 if (body->valid & OBD_MD_FLCOOKIE) {
1784 LASSERT(master->rq_repmsg->buflens[2] >=
1785 slave->rq_repmsg->buflens[2]);
1786 cookie = lustre_msg_buf(slave->rq_repmsg, 2,
1787 slave->rq_repmsg->buflens[2]);
1788 LASSERT(cookie != NULL);
1790 cookie2 = lustre_msg_buf(master->rq_repmsg, 2,
1791 master->rq_repmsg->buflens[2]);
1792 LASSERT(cookie2 != NULL);
1793 memcpy(cookie2, cookie, slave->rq_repmsg->buflens[2]);
1794 body2->valid |= OBD_MD_FLCOOKIE;
1799 static int mds_reint_unlink_remote(struct mds_update_record *rec,
1800 int offset, struct ptlrpc_request *req,
1801 struct lustre_handle *parent_lockh,
1802 int update_mode, struct dentry *dparent,
1803 struct lustre_handle *child_lockh,
1804 struct dentry *dchild)
1806 struct obd_device *obd = req->rq_export->exp_obd;
1807 struct mds_obd *mds = mds_req2mds(req);
1808 struct ptlrpc_request *request = NULL;
1809 int rc = 0, cleanup_phase = 0;
1810 struct mdc_op_data *op_data;
1814 LASSERT(offset == 1 || offset == 3);
1816 /* time to drop i_nlink on remote MDS */
1817 OBD_ALLOC(op_data, sizeof(*op_data));
1818 if (op_data == NULL)
1821 memset(op_data, 0, sizeof(*op_data));
1822 mds_pack_dentry2id(obd, &op_data->id1, dchild, 1);
1823 op_data->create_mode = rec->ur_mode;
1825 DEBUG_REQ(D_INODE, req, "unlink %*s (remote inode "DLID4")",
1826 rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data->id1));
1828 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1829 DEBUG_REQ(D_HA, req, "unlink %*s (remote inode "DLID4")",
1830 rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data->id1));
1833 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1834 op_data->create_mode |= MDS_MODE_REPLAY;
1836 rc = md_unlink(mds->mds_md_exp, op_data, &request);
1837 OBD_FREE(op_data, sizeof(*op_data));
1842 mds_copy_unlink_reply(req, request);
1843 ptlrpc_req_finished(request);
1847 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
1850 GOTO(cleanup, rc = PTR_ERR(handle));
1851 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, dchild);
1852 rc = mds_finish_transno(mds, dparent->d_inode, handle, req,
1857 req->rq_status = rc;
1860 if (parent_lockh[1].cookie != 0)
1861 ldlm_lock_decref(parent_lockh + 1, update_mode);
1863 ldlm_lock_decref(child_lockh, LCK_EX);
1865 ldlm_lock_decref(parent_lockh, LCK_PW);
1867 ptlrpc_save_lock(req, parent_lockh, LCK_PW);
1874 static int mds_reint_unlink(struct mds_update_record *rec, int offset,
1875 struct ptlrpc_request *req,
1876 struct lustre_handle *lh)
1878 struct dentry *dparent = NULL, *dchild;
1879 struct mds_obd *mds = mds_req2mds(req);
1880 struct obd_device *obd = req->rq_export->exp_obd;
1881 struct mds_body *body = NULL;
1882 struct inode *child_inode = NULL;
1883 struct lustre_handle parent_lockh[2] = {{0}, {0}};
1884 struct lustre_handle child_lockh = {0};
1885 struct lustre_handle child_reuse_lockh = {0};
1886 struct lustre_handle *slave_lockh = NULL;
1887 char idname[LL_ID_NAMELEN];
1888 struct llog_create_locks *lcl = NULL;
1889 void *handle = NULL;
1890 int rc = 0, cleanup_phase = 0;
1891 int unlink_by_id = 0;
1895 LASSERT(offset == 1 || offset == 3);
1897 DEBUG_REQ(D_INODE, req, "parent ino "LPU64"/%u, child %s",
1898 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
1901 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1903 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1904 DEBUG_REQ(D_HA, req, "unlink replay");
1905 LASSERT(offset == 1); /* should not come from intent */
1906 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
1907 lustre_msg_buf(req->rq_reqmsg, offset + 2, 0),
1908 req->rq_repmsg->buflens[2]);
1911 MD_COUNTER_INCREMENT(obd, unlink);
1913 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
1914 GOTO(cleanup, rc = -ENOENT);
1916 if (rec->ur_namelen == 1) {
1917 /* this is request to drop i_nlink on local inode */
1919 rec->ur_name = idname;
1920 rc = mds_create_local_dentry(rec, obd);
1921 if (rc == -ENOENT || (rec->ur_mode & MDS_MODE_REPLAY)) {
1922 DEBUG_REQ(D_HA, req,
1923 "drop nlink on inode "DLID4" (replay)",
1924 OLID4(rec->ur_id1));
1930 if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
1931 /* master mds for directory asks slave removing inode is already
1933 dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL,
1934 LCK_PW, parent_lockh,
1935 &update_mode, rec->ur_name,
1937 MDS_INODELOCK_UPDATE);
1938 if (IS_ERR(dparent))
1939 GOTO(cleanup, rc = PTR_ERR(dparent));
1940 dchild = ll_lookup_one_len(rec->ur_name, dparent,
1941 rec->ur_namelen - 1);
1943 GOTO(cleanup, rc = PTR_ERR(dchild));
1944 child_lockh.cookie = 0;
1945 LASSERT(!(dchild->d_flags & DCACHE_CROSS_REF));
1946 LASSERT(dchild->d_inode != NULL);
1947 LASSERT(S_ISDIR(dchild->d_inode->i_mode));
1949 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1,
1950 parent_lockh, &dparent,
1951 LCK_PW, MDS_INODELOCK_UPDATE,
1952 &update_mode, rec->ur_name,
1953 rec->ur_namelen, &child_lockh,
1955 MDS_INODELOCK_LOOKUP |
1956 MDS_INODELOCK_UPDATE);
1961 if (dchild->d_flags & DCACHE_CROSS_REF) {
1962 /* we should have parent lock only here */
1963 LASSERT(unlink_by_id == 0);
1964 LASSERT(dchild->d_mdsnum != mds->mds_num);
1965 mds_reint_unlink_remote(rec, offset, req, parent_lockh,
1966 update_mode, dparent, &child_lockh, dchild);
1970 cleanup_phase = 1; /* dchild, dparent, locks */
1973 child_inode = dchild->d_inode;
1974 if (child_inode == NULL) {
1975 CDEBUG(D_INODE, "child doesn't exist (dir %lu, name %s)\n",
1976 dparent ? dparent->d_inode->i_ino : 0, rec->ur_name);
1977 GOTO(cleanup, rc = -ENOENT);
1980 cleanup_phase = 2; /* dchild has a lock */
1982 /* We have to do these checks ourselves, in case we are making an
1983 * orphan. The client tells us whether rmdir() or unlink() was called,
1984 * so we need to return appropriate errors (bug 72).
1986 * We don't have to check permissions, because vfs_rename (called from
1987 * mds_open_unlink_rename) also calls may_delete. */
1988 if ((rec->ur_mode & S_IFMT) == S_IFDIR) {
1989 if (!S_ISDIR(child_inode->i_mode))
1990 GOTO(cleanup, rc = -ENOTDIR);
1992 if (S_ISDIR(child_inode->i_mode))
1993 GOTO(cleanup, rc = -EISDIR);
1996 /* handle splitted dir */
1997 rc = mds_lock_slave_objs(obd, dchild, &slave_lockh);
2001 /* Step 4: Get a lock on the ino to sync with creation WRT inode
2002 * reuse (see bug 2029). */
2003 rc = mds_lock_new_child(obd, child_inode, &child_reuse_lockh);
2006 cleanup_phase = 3; /* child inum lock */
2008 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dparent->d_inode->i_sb);
2010 /* ldlm_reply in buf[0] if called via intent */
2016 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
2017 LASSERT(body != NULL);
2019 /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
2020 DOWN_READ_I_ALLOC_SEM(child_inode);
2021 cleanup_phase = 4; /* up(&child_inode->i_sem) when finished */
2023 /* If this is potentially the last reference to this inode, get the
2024 * OBD EA data first so the client can destroy OST objects. We
2025 * only do the object removal later if no open files/links remain. */
2026 if ((S_ISDIR(child_inode->i_mode) && child_inode->i_nlink == 2) ||
2027 child_inode->i_nlink == 1) {
2028 if (mds_orphan_open_count(child_inode) > 0) {
2029 /* need to lock pending_dir before transaction */
2030 down(&mds->mds_pending_dir->d_inode->i_sem);
2031 cleanup_phase = 5; /* up(&pending_dir->i_sem) */
2032 } else if (S_ISREG(child_inode->i_mode)) {
2033 mds_pack_inode2body(obd, body, child_inode, 0);
2034 mds_pack_md(obd, req->rq_repmsg, offset + 1,
2035 body, child_inode, MDS_PACK_MD_LOCK);
2039 /* Step 4: Do the unlink: we already verified ur_mode above (bug 72) */
2040 switch (child_inode->i_mode & S_IFMT) {
2042 /* Drop any lingering child directories before we start our
2043 * transaction, to avoid doing multiple inode dirty/delete
2044 * in our compound transaction (bug 1321). */
2045 shrink_dcache_parent(dchild);
2046 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
2049 GOTO(cleanup, rc = PTR_ERR(handle));
2050 rc = vfs_rmdir(dparent->d_inode, dchild);
2053 #warning "optimization is possible here: we could drop nlink w/o removing local dentry in FIDS/"
2054 struct lov_mds_md *lmm = lustre_msg_buf(req->rq_repmsg,
2056 handle = fsfilt_start_log(obd, dparent->d_inode,
2057 FSFILT_OP_UNLINK, NULL,
2058 le32_to_cpu(lmm->lmm_stripe_count));
2060 GOTO(cleanup, rc = PTR_ERR(handle));
2061 rc = vfs_unlink(dparent->d_inode, dchild);
2069 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK,
2072 GOTO(cleanup, rc = PTR_ERR(handle));
2073 rc = vfs_unlink(dparent->d_inode, dchild);
2076 CERROR("bad file type %o unlinking %s\n", rec->ur_mode,
2079 GOTO(cleanup, rc = -EINVAL);
2082 if (rc == 0 && child_inode->i_nlink == 0) {
2083 if (mds_orphan_open_count(child_inode) > 0)
2084 rc = mds_orphan_add_link(rec, obd, dchild);
2087 GOTO(cleanup, rc = 0);
2089 if (!S_ISREG(child_inode->i_mode))
2092 if (!(body->valid & OBD_MD_FLEASIZE)) {
2093 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
2094 OBD_MD_FLATIME | OBD_MD_FLMTIME);
2095 } else if (mds_log_op_unlink(obd, child_inode,
2096 lustre_msg_buf(req->rq_repmsg, offset + 1, 0),
2097 req->rq_repmsg->buflens[offset + 1],
2098 lustre_msg_buf(req->rq_repmsg, offset + 2, 0),
2099 req->rq_repmsg->buflens[offset+2],
2101 body->valid |= OBD_MD_FLCOOKIE;
2112 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
2113 LTIME_S(iattr.ia_mtime) = rec->ur_time;
2114 LTIME_S(iattr.ia_ctime) = rec->ur_time;
2116 err = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
2118 CERROR("error on parent setattr: rc = %d\n", err);
2120 rc = mds_finish_transno(mds, dparent ? dparent->d_inode : NULL,
2121 handle, req, rc, 0);
2123 (void)obd_set_info(mds->mds_dt_exp, strlen("unlinked"),
2124 "unlinked", 0, NULL);
2125 switch(cleanup_phase) {
2126 case 5: /* pending_dir semaphore */
2127 up(&mds->mds_pending_dir->d_inode->i_sem);
2128 case 4: /* child inode semaphore */
2129 UP_READ_I_ALLOC_SEM(child_inode);
2130 /* handle splitted dir */
2132 /* master directory can be non-empty or something else ... */
2133 mds_unlink_slave_objs(obd, dchild);
2136 ptlrpc_save_llog_lock(req, lcl);
2137 case 3: /* child ino-reuse lock */
2138 if (rc && body != NULL) {
2139 // Don't unlink the OST objects if the MDS unlink failed
2143 ldlm_lock_decref(&child_reuse_lockh, LCK_EX);
2145 ptlrpc_save_lock(req, &child_reuse_lockh, LCK_EX);
2146 case 2: /* child lock */
2147 mds_unlock_slave_objs(obd, dchild, slave_lockh);
2148 if (child_lockh.cookie)
2149 ldlm_lock_decref(&child_lockh, LCK_EX);
2150 case 1: /* child and parent dentry, parent lock */
2152 if (parent_lockh[1].cookie != 0)
2153 ldlm_lock_decref(parent_lockh + 1, update_mode);
2156 ldlm_lock_decref(parent_lockh, LCK_PW);
2158 ptlrpc_save_lock(req, parent_lockh, LCK_PW);
2165 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2168 req->rq_status = rc;
2173 * to service requests from remote MDS to increment i_nlink
2175 static int mds_reint_link_acquire(struct mds_update_record *rec,
2176 int offset, struct ptlrpc_request *req,
2177 struct lustre_handle *lh)
2179 struct obd_device *obd = req->rq_export->exp_obd;
2180 struct ldlm_res_id src_res_id = { .name = {0} };
2181 struct lustre_handle *handle = NULL, src_lockh = {0};
2182 struct mds_obd *mds = mds_req2mds(req);
2183 int rc = 0, cleanup_phase = 0;
2184 struct dentry *de_src = NULL;
2185 ldlm_policy_data_t policy;
2189 DEBUG_REQ(D_INODE, req, "%s: request to acquire i_nlinks "DLID4"\n",
2190 obd->obd_name, OLID4(rec->ur_id1));
2192 /* Step 1: Lookup the source inode and target directory by ID */
2193 de_src = mds_id2dentry(obd, rec->ur_id1, NULL);
2195 GOTO(cleanup, rc = PTR_ERR(de_src));
2196 cleanup_phase = 1; /* source dentry */
2198 src_res_id.name[0] = id_fid(rec->ur_id1);
2199 src_res_id.name[1] = id_group(rec->ur_id1);
2200 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
2202 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
2203 src_res_id, LDLM_IBITS, &policy,
2204 LCK_EX, &flags, mds_blocking_ast,
2205 ldlm_completion_ast, NULL, NULL,
2206 NULL, 0, NULL, &src_lockh);
2208 GOTO(cleanup, rc = -ENOLCK);
2209 cleanup_phase = 2; /* lock */
2211 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
2213 handle = fsfilt_start(obd, de_src->d_inode, FSFILT_OP_LINK, NULL);
2214 if (IS_ERR(handle)) {
2215 rc = PTR_ERR(handle);
2218 de_src->d_inode->i_nlink++;
2219 mark_inode_dirty(de_src->d_inode);
2223 rc = mds_finish_transno(mds, de_src ? de_src->d_inode : NULL,
2224 handle, req, rc, 0);
2225 switch (cleanup_phase) {
2228 ldlm_lock_decref(&src_lockh, LCK_EX);
2230 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
2236 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2239 req->rq_status = rc;
2244 * request to link to foreign inode:
2245 * - acquire i_nlinks on this inode
2248 static int mds_reint_link_to_remote(struct mds_update_record *rec,
2249 int offset, struct ptlrpc_request *req,
2250 struct lustre_handle *lh)
2252 struct lustre_handle *handle = NULL, tgt_dir_lockh[2] = {{0}, {0}};
2253 struct obd_device *obd = req->rq_export->exp_obd;
2254 struct dentry *de_tgt_dir = NULL;
2255 struct mds_obd *mds = mds_req2mds(req);
2256 int rc = 0, cleanup_phase = 0;
2257 struct mdc_op_data *op_data;
2258 struct ptlrpc_request *request = NULL;
2262 DEBUG_REQ(D_INODE, req, "%s: request to link "DLID4
2263 ":%*s to foreign inode "DLID4"\n", obd->obd_name,
2264 OLID4(rec->ur_id2), rec->ur_namelen - 1, rec->ur_name,
2265 OLID4(rec->ur_id1));
2267 de_tgt_dir = mds_id2locked_dentry(obd, rec->ur_id2, NULL, LCK_EX,
2268 tgt_dir_lockh, &update_mode,
2269 rec->ur_name, rec->ur_namelen - 1,
2270 MDS_INODELOCK_UPDATE);
2271 if (IS_ERR(de_tgt_dir))
2272 GOTO(cleanup, rc = PTR_ERR(de_tgt_dir));
2275 OBD_ALLOC(op_data, sizeof(*op_data));
2276 if (op_data == NULL)
2277 GOTO(cleanup, rc = -ENOMEM);
2279 memset(op_data, 0, sizeof(*op_data));
2280 op_data->id1 = *(rec->ur_id1);
2281 rc = md_link(mds->mds_md_exp, op_data, &request);
2282 OBD_FREE(op_data, sizeof(*op_data));
2288 ptlrpc_req_finished(request);
2290 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_tgt_dir->d_inode->i_sb);
2292 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
2293 if (IS_ERR(handle)) {
2294 rc = PTR_ERR(handle);
2300 rc = fsfilt_add_dir_entry(obd, de_tgt_dir, rec->ur_name,
2301 rec->ur_namelen - 1, id_ino(rec->ur_id1),
2302 id_gen(rec->ur_id1), id_group(rec->ur_id1),
2303 id_fid(rec->ur_id1));
2306 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
2307 handle, req, rc, 0);
2309 switch (cleanup_phase) {
2312 OBD_ALLOC(op_data, sizeof(*op_data));
2313 if (op_data != NULL) {
2315 memset(op_data, 0, sizeof(*op_data));
2317 op_data->id1 = *(rec->ur_id1);
2318 op_data->create_mode = rec->ur_mode;
2320 rc = md_unlink(mds->mds_md_exp, op_data, &request);
2321 OBD_FREE(op_data, sizeof(*op_data));
2323 ptlrpc_req_finished(request);
2325 CERROR("error %d while dropping i_nlink on "
2326 "remote inode\n", rc);
2329 CERROR("rc %d prevented dropping i_nlink on "
2330 "remote inode\n", -ENOMEM);
2336 ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
2338 ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
2341 ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
2343 ptlrpc_save_lock(req, tgt_dir_lockh + 1, update_mode);
2349 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2352 req->rq_status = rc;
2356 static int mds_reint_link(struct mds_update_record *rec, int offset,
2357 struct ptlrpc_request *req,
2358 struct lustre_handle *lh)
2360 struct obd_device *obd = req->rq_export->exp_obd;
2361 struct dentry *de_src = NULL;
2362 struct dentry *de_tgt_dir = NULL;
2363 struct dentry *dchild = NULL;
2364 struct mds_obd *mds = mds_req2mds(req);
2365 struct lustre_handle *handle = NULL;
2366 struct lustre_handle tgt_dir_lockh[2] = {{0}, {0}}, src_lockh = {0};
2367 struct ldlm_res_id src_res_id = { .name = {0} };
2368 struct ldlm_res_id tgt_dir_res_id = { .name = {0} };
2369 ldlm_policy_data_t src_policy ={.l_inodebits = {MDS_INODELOCK_UPDATE}};
2370 ldlm_policy_data_t tgt_dir_policy =
2371 {.l_inodebits = {MDS_INODELOCK_UPDATE}};
2372 int rc = 0, cleanup_phase = 0;
2374 int update_mode = 0;
2378 LASSERT(offset == 1);
2380 DEBUG_REQ(D_INODE, req, "original "LPU64"/%u to "LPU64"/%u %s",
2381 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
2382 id_ino(rec->ur_id2), id_gen(rec->ur_id2),
2385 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
2386 MD_COUNTER_INCREMENT(obd, link);
2388 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
2389 GOTO(cleanup, rc = -ENOENT);
2391 if (id_group(rec->ur_id1) != mds->mds_num) {
2392 rc = mds_reint_link_to_remote(rec, offset, req, lh);
2396 if (rec->ur_namelen == 1) {
2397 rc = mds_reint_link_acquire(rec, offset, req, lh);
2401 /* Step 1: Lookup the source inode and target directory by ID */
2402 de_src = mds_id2dentry(obd, rec->ur_id1, NULL);
2404 GOTO(cleanup, rc = PTR_ERR(de_src));
2406 cleanup_phase = 1; /* source dentry */
2408 de_tgt_dir = mds_id2dentry(obd, rec->ur_id2, NULL);
2409 if (IS_ERR(de_tgt_dir)) {
2410 rc = PTR_ERR(de_tgt_dir);
2415 cleanup_phase = 2; /* target directory dentry */
2417 CDEBUG(D_INODE, "linking %*s/%s to inode %lu\n",
2418 de_tgt_dir->d_name.len, de_tgt_dir->d_name.name,
2419 rec->ur_name, de_src->d_inode->i_ino);
2421 /* Step 2: Take the two locks */
2422 src_res_id.name[0] = id_fid(rec->ur_id1);
2423 src_res_id.name[1] = id_group(rec->ur_id1);
2424 tgt_dir_res_id.name[0] = id_fid(rec->ur_id2);
2425 tgt_dir_res_id.name[1] = id_group(rec->ur_id2);
2428 if (IS_PDIROPS(de_tgt_dir->d_inode)) {
2430 update_mode = mds_lock_mode_for_dir(obd, de_tgt_dir, LCK_EX);
2432 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
2433 tgt_dir_res_id, LDLM_IBITS,
2434 &src_policy, update_mode, &flags,
2436 ldlm_completion_ast, NULL, NULL,
2437 NULL, 0, NULL, tgt_dir_lockh + 1);
2439 GOTO(cleanup, rc = -ENOLCK);
2442 tgt_dir_res_id.name[2] = full_name_hash(rec->ur_name,
2443 rec->ur_namelen - 1);
2444 CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n",
2445 (unsigned long)id_fid(rec->ur_id2),
2446 (unsigned long)id_group(rec->ur_id2),
2447 tgt_dir_res_id.name[2]);
2450 rc = enqueue_ordered_locks(obd, &src_res_id, &src_lockh, LCK_EX,
2451 &src_policy, &tgt_dir_res_id, tgt_dir_lockh,
2452 LCK_EX, &tgt_dir_policy);
2456 cleanup_phase = 3; /* locks */
2458 /* Step 3: Lookup the child */
2459 dchild = ll_lookup_one_len(rec->ur_name, de_tgt_dir,
2460 rec->ur_namelen - 1);
2461 if (IS_ERR(dchild)) {
2462 rc = PTR_ERR(dchild);
2463 if (rc != -EPERM && rc != -EACCES)
2464 CERROR("child lookup error %d\n", rc);
2468 cleanup_phase = 4; /* child dentry */
2470 if (dchild->d_inode) {
2471 CDEBUG(D_INODE, "child exists (dir %lu, name %s)\n",
2472 de_tgt_dir->d_inode->i_ino, rec->ur_name);
2477 /* Step 4: Do it. */
2478 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
2480 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
2481 if (IS_ERR(handle)) {
2482 rc = PTR_ERR(handle);
2486 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
2487 if (rc && rc != -EPERM && rc != -EACCES)
2488 CERROR("vfs_link error %d\n", rc);
2490 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
2491 handle, req, rc, 0);
2494 switch (cleanup_phase) {
2495 case 4: /* child dentry */
2499 ldlm_lock_decref(&src_lockh, LCK_EX);
2500 ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
2502 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
2503 ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
2505 case 2: /* target dentry */
2507 if (tgt_dir_lockh[1].cookie && update_mode)
2508 ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
2512 case 1: /* source dentry */
2517 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2520 req->rq_status = rc;
2524 /* The idea here is that we need to get four locks in the end:
2525 * one on each parent directory, one on each child. We need to take
2526 * these locks in some kind of order (to avoid deadlocks), and the order
2527 * I selected is "increasing resource number" order. We need to look up
2528 * the children, however, before we know what the resource number(s) are.
2529 * Thus the following plan:
2531 * 1,2. Look up the parents
2532 * 3,4. Look up the children
2533 * 5. Take locks on the parents and children, in order
2534 * 6. Verify that the children haven't changed since they were looked up
2536 * If there was a race and the children changed since they were first looked
2537 * up, it is possible that mds_verify_child() will be able to just grab the
2538 * lock on the new child resource (if it has a higher resource than any other)
2539 * but we need to compare against not only its parent, but also against the
2540 * parent and child of the "other half" of the rename, hence maxres_{src,tgt}.
2542 * We need the fancy igrab() on the child inodes because we aren't holding a
2543 * lock on the parent after the lookup is done, so dentry->d_inode may change
2544 * at any time, and igrab() itself doesn't like getting passed a NULL argument.
2546 static int mds_get_parents_children_locked(struct obd_device *obd,
2547 struct mds_obd *mds,
2548 struct lustre_id *p1_id,
2549 struct dentry **de_srcdirp,
2550 struct lustre_id *p2_id,
2551 struct dentry **de_tgtdirp,
2553 const char *old_name, int old_len,
2554 struct dentry **de_oldp,
2555 const char *new_name, int new_len,
2556 struct dentry **de_newp,
2557 struct lustre_handle *dlm_handles,
2560 struct ldlm_res_id p1_res_id = { .name = {0} };
2561 struct ldlm_res_id p2_res_id = { .name = {0} };
2562 struct ldlm_res_id c1_res_id = { .name = {0} };
2563 struct ldlm_res_id c2_res_id = { .name = {0} };
2564 ldlm_policy_data_t p_policy = {.l_inodebits = {MDS_INODELOCK_UPDATE}};
2565 /* Only dentry should change, but the inode itself would be
2567 ldlm_policy_data_t c1_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP}};
2568 /* If something is going to be replaced, both dentry and inode locks are
2570 ldlm_policy_data_t c2_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP|
2571 MDS_INODELOCK_UPDATE}};
2572 struct ldlm_res_id *maxres_src, *maxres_tgt;
2573 struct inode *inode;
2574 int rc = 0, cleanup_phase = 0;
2577 /* Step 1: Lookup the source directory */
2578 *de_srcdirp = mds_id2dentry(obd, p1_id, NULL);
2579 if (IS_ERR(*de_srcdirp))
2580 GOTO(cleanup, rc = PTR_ERR(*de_srcdirp));
2582 cleanup_phase = 1; /* source directory dentry */
2584 p1_res_id.name[0] = id_fid(p1_id);
2585 p1_res_id.name[1] = id_group(p1_id);
2587 /* Step 2: Lookup the target directory */
2588 if (id_equal_stc(p1_id, p2_id)) {
2589 *de_tgtdirp = dget(*de_srcdirp);
2591 *de_tgtdirp = mds_id2dentry(obd, p2_id, NULL);
2592 if (IS_ERR(*de_tgtdirp)) {
2593 rc = PTR_ERR(*de_tgtdirp);
2599 cleanup_phase = 2; /* target directory dentry */
2601 p2_res_id.name[0] = id_fid(p2_id);
2602 p2_res_id.name[1] = id_group(p2_id);
2605 dlm_handles[5].cookie = 0;
2606 dlm_handles[6].cookie = 0;
2608 if (IS_PDIROPS((*de_srcdirp)->d_inode)) {
2610 * get a temp lock on just fid, group to flush client cache and
2611 * to protect dirs from concurrent splitting.
2613 rc = enqueue_ordered_locks(obd, &p1_res_id, &dlm_handles[5],
2614 LCK_PW, &p_policy, &p2_res_id,
2615 &dlm_handles[6], LCK_PW, &p_policy);
2619 p1_res_id.name[2] = full_name_hash(old_name, old_len - 1);
2620 p2_res_id.name[2] = full_name_hash(new_name, new_len - 1);
2622 CDEBUG(D_INFO, "take locks on "
2623 LPX64":"LPX64":"LPX64", "LPX64":"LPX64":"LPX64"\n",
2624 p1_res_id.name[0], p1_res_id.name[1], p1_res_id.name[2],
2625 p2_res_id.name[0], p2_res_id.name[1], p2_res_id.name[2]);
2630 /* Step 3: Lookup the source child entry */
2631 *de_oldp = ll_lookup_one_len(old_name, *de_srcdirp,
2633 if (IS_ERR(*de_oldp)) {
2634 rc = PTR_ERR(*de_oldp);
2635 CERROR("old child lookup error (%*s): %d\n",
2636 old_len - 1, old_name, rc);
2640 cleanup_phase = 4; /* original name dentry */
2642 inode = (*de_oldp)->d_inode;
2643 if (inode != NULL) {
2644 struct lustre_id sid;
2646 inode = igrab(inode);
2648 GOTO(cleanup, rc = -ENOENT);
2650 down(&inode->i_sem);
2651 rc = mds_read_inode_sid(obd, inode, &sid);
2654 CERROR("Can't read inode self id, inode %lu, "
2655 "rc %d\n", inode->i_ino, rc);
2660 c1_res_id.name[0] = id_fid(&sid);
2661 c1_res_id.name[1] = id_group(&sid);
2663 } else if ((*de_oldp)->d_flags & DCACHE_CROSS_REF) {
2664 c1_res_id.name[0] = (*de_oldp)->d_fid;
2665 c1_res_id.name[1] = (*de_oldp)->d_mdsnum;
2667 GOTO(cleanup, rc = -ENOENT);
2670 /* Step 4: Lookup the target child entry */
2671 *de_newp = ll_lookup_one_len(new_name, *de_tgtdirp,
2673 if (IS_ERR(*de_newp)) {
2674 rc = PTR_ERR(*de_newp);
2675 CERROR("new child lookup error (%*s): %d\n",
2676 old_len - 1, old_name, rc);
2680 cleanup_phase = 5; /* target dentry */
2682 inode = (*de_newp)->d_inode;
2683 if (inode != NULL) {
2684 struct lustre_id sid;
2686 inode = igrab(inode);
2690 down(&inode->i_sem);
2691 rc = mds_read_inode_sid(obd, inode, &sid);
2694 CERROR("Can't read inode self id, inode %lu, "
2695 "rc %d\n", inode->i_ino, rc);
2699 c2_res_id.name[0] = id_fid(&sid);
2700 c2_res_id.name[1] = id_group(&sid);
2702 } else if ((*de_newp)->d_flags & DCACHE_CROSS_REF) {
2703 c2_res_id.name[0] = (*de_newp)->d_fid;
2704 c2_res_id.name[1] = (*de_newp)->d_mdsnum;
2708 /* Step 5: Take locks on the parents and child(ren) */
2709 maxres_src = &p1_res_id;
2710 maxres_tgt = &p2_res_id;
2711 cleanup_phase = 5; /* target dentry */
2713 if (c1_res_id.name[0] != 0 && res_gt(&c1_res_id, &p1_res_id, NULL, NULL))
2714 maxres_src = &c1_res_id;
2715 if (c2_res_id.name[0] != 0 && res_gt(&c2_res_id, &p2_res_id, NULL, NULL))
2716 maxres_tgt = &c2_res_id;
2718 rc = enqueue_4ordered_locks(obd, &p1_res_id, &dlm_handles[0], parent_mode,
2720 &p2_res_id, &dlm_handles[1], parent_mode,
2722 &c1_res_id, &dlm_handles[2], child_mode,
2724 &c2_res_id, &dlm_handles[3], child_mode,
2729 cleanup_phase = 6; /* parent and child(ren) locks */
2731 /* Step 6a: Re-lookup source child to verify it hasn't changed */
2732 rc = mds_verify_child(obd, &p1_res_id, &dlm_handles[0], *de_srcdirp,
2733 parent_mode, &c1_res_id, &dlm_handles[2],
2734 de_oldp, child_mode, &c1_policy, old_name,old_len,
2737 if (c2_res_id.name[0] != 0)
2738 ldlm_lock_decref(&dlm_handles[3], child_mode);
2739 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2746 if (!DENTRY_VALID(*de_oldp))
2747 GOTO(cleanup, rc = -ENOENT);
2749 /* Step 6b: Re-lookup target child to verify it hasn't changed */
2750 rc = mds_verify_child(obd, &p2_res_id, &dlm_handles[1], *de_tgtdirp,
2751 parent_mode, &c2_res_id, &dlm_handles[3],
2752 de_newp, child_mode, &c2_policy, new_name,
2753 new_len, maxres_src);
2755 ldlm_lock_decref(&dlm_handles[2], child_mode);
2756 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2766 switch (cleanup_phase) {
2767 case 6: /* child lock(s) */
2768 if (c2_res_id.name[0] != 0)
2769 ldlm_lock_decref(&dlm_handles[3], child_mode);
2770 if (c1_res_id.name[0] != 0)
2771 ldlm_lock_decref(&dlm_handles[2], child_mode);
2772 if (dlm_handles[1].cookie != 0)
2773 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2774 if (dlm_handles[0].cookie != 0)
2775 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2776 case 5: /* target dentry */
2778 case 4: /* source dentry */
2782 if (dlm_handles[5].cookie != 0)
2783 ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
2784 if (dlm_handles[6].cookie != 0)
2785 ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
2787 case 2: /* target directory dentry */
2788 l_dput(*de_tgtdirp);
2789 case 1: /* source directry dentry */
2790 l_dput(*de_srcdirp);
2798 * checks if dentry can be removed. This function also handles cross-ref
2801 static int mds_check_for_rename(struct obd_device *obd,
2802 struct dentry *dentry)
2804 struct mds_obd *mds = &obd->u.mds;
2805 struct lustre_handle *rlockh;
2806 struct ptlrpc_request *req;
2807 struct mdc_op_data *op_data;
2808 struct lookup_intent it;
2809 int handle_size, rc = 0;
2812 LASSERT(dentry != NULL);
2814 if (dentry->d_inode) {
2815 if (S_ISDIR(dentry->d_inode->i_mode) &&
2816 !mds_is_dir_empty(obd, dentry))
2819 LASSERT((dentry->d_flags & DCACHE_CROSS_REF));
2820 handle_size = sizeof(struct lustre_handle);
2822 OBD_ALLOC(rlockh, handle_size);
2826 memset(rlockh, 0, handle_size);
2827 OBD_ALLOC(op_data, sizeof(*op_data));
2828 if (op_data == NULL) {
2829 OBD_FREE(rlockh, handle_size);
2832 memset(op_data, 0, sizeof(*op_data));
2833 mds_pack_dentry2id(obd, &op_data->id1, dentry, 1);
2835 it.it_op = IT_UNLINK;
2836 rc = md_enqueue(mds->mds_md_exp, LDLM_IBITS, &it, LCK_EX,
2837 op_data, rlockh, NULL, 0, ldlm_completion_ast,
2838 mds_blocking_ast, NULL);
2839 OBD_FREE(op_data, sizeof(*op_data));
2844 if (rlockh->cookie != 0)
2845 ldlm_lock_decref(rlockh, LCK_EX);
2847 if (it.d.lustre.it_data) {
2848 req = (struct ptlrpc_request *)it.d.lustre.it_data;
2849 ptlrpc_req_finished(req);
2852 if (it.d.lustre.it_status)
2853 rc = it.d.lustre.it_status;
2854 OBD_FREE(rlockh, handle_size);
2859 static int mds_add_local_dentry(struct mds_update_record *rec, int offset,
2860 struct ptlrpc_request *req, struct lustre_id *id,
2861 struct dentry *de_dir, struct dentry *de)
2863 struct obd_device *obd = req->rq_export->exp_obd;
2864 struct mds_obd *mds = mds_req2mds(req);
2865 void *handle = NULL;
2871 * name exists and points to local inode try to unlink this name
2872 * and create new one.
2874 CDEBUG(D_OTHER, "%s: %s points to local inode %lu/%lu\n",
2875 obd->obd_name, rec->ur_tgt, (unsigned long)de->d_inode->i_ino,
2876 (unsigned long)de->d_inode->i_generation);
2878 /* checking if we can remove local dentry. */
2879 rc = mds_check_for_rename(obd, de);
2883 handle = fsfilt_start(obd, de_dir->d_inode,
2884 FSFILT_OP_RENAME, NULL);
2886 GOTO(cleanup, rc = PTR_ERR(handle));
2887 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de);
2890 } else if (de->d_flags & DCACHE_CROSS_REF) {
2891 CDEBUG(D_OTHER, "%s: %s points to remote inode %lu/%lu\n",
2892 obd->obd_name, rec->ur_tgt, (unsigned long)de->d_mdsnum,
2893 (unsigned long)de->d_fid);
2895 /* checking if we can remove local dentry. */
2896 rc = mds_check_for_rename(obd, de);
2901 * to be fully POSIX compatible, we should add one more check:
2903 * if de_new is subdir of dir rec->ur_id1. If so - return
2906 * I do not know how to implement it right now, because
2907 * inodes/dentries for new and old names lie on different MDS,
2908 * so add this notice here just to make it visible for the rest
2909 * of developers and do not forget about. And when this check
2910 * will be added, del_cross_ref should gone, that is local
2911 * dentry is able to be removed if all checks passed. --umka
2914 handle = fsfilt_start(obd, de_dir->d_inode,
2915 FSFILT_OP_RENAME, NULL);
2917 GOTO(cleanup, rc = PTR_ERR(handle));
2918 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de);
2922 /* name doesn't exist. the simplest case. */
2923 handle = fsfilt_start(obd, de_dir->d_inode,
2924 FSFILT_OP_LINK, NULL);
2926 GOTO(cleanup, rc = PTR_ERR(handle));
2929 rc = fsfilt_add_dir_entry(obd, de_dir, rec->ur_tgt,
2930 rec->ur_tgtlen - 1, id_ino(id),
2931 id_gen(id), id_group(id), id_fid(id));
2933 CERROR("add_dir_entry() returned error %d\n", rc);
2939 rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL,
2940 handle, req, rc, 0);
2945 static int mds_del_local_dentry(struct mds_update_record *rec, int offset,
2946 struct ptlrpc_request *req, struct dentry *de_dir,
2949 struct obd_device *obd = req->rq_export->exp_obd;
2950 struct mds_obd *mds = mds_req2mds(req);
2951 void *handle = NULL;
2955 handle = fsfilt_start(obd, de_dir->d_inode, FSFILT_OP_UNLINK, NULL);
2957 GOTO(cleanup, rc = PTR_ERR(handle));
2958 rc = fsfilt_del_dir_entry(obd, de);
2963 rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL,
2964 handle, req, rc, 0);
2968 static int mds_reint_rename_create_name(struct mds_update_record *rec,
2969 int offset, struct ptlrpc_request *req)
2971 struct lustre_handle parent_lockh[2] = {{0}, {0}};
2972 struct obd_device *obd = req->rq_export->exp_obd;
2973 struct mds_obd *mds = mds_req2mds(req);
2974 struct lustre_handle child_lockh = {0};
2975 struct dentry *de_tgtdir = NULL;
2976 struct dentry *de_new = NULL;
2977 int cleanup_phase = 0;
2978 int update_mode, rc = 0;
2982 * another MDS executing rename operation has asked us to create target
2983 * name. such a creation should destroy existing target name.
2985 CDEBUG(D_OTHER, "%s: request to create name %s for "DLID4"\n",
2986 obd->obd_name, rec->ur_tgt, OLID4(rec->ur_id1));
2988 /* first, lookup the target */
2989 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id2, parent_lockh,
2990 &de_tgtdir, LCK_PW, MDS_INODELOCK_UPDATE,
2991 &update_mode, rec->ur_tgt, rec->ur_tgtlen,
2992 &child_lockh, &de_new, LCK_EX,
2993 MDS_INODELOCK_LOOKUP);
3000 LASSERT(de_tgtdir->d_inode);
3003 rc = mds_add_local_dentry(rec, offset, req, rec->ur_id1,
3009 if (cleanup_phase == 1) {
3011 if (parent_lockh[1].cookie != 0)
3012 ldlm_lock_decref(parent_lockh + 1, update_mode);
3014 ldlm_lock_decref(parent_lockh, LCK_PW);
3015 if (child_lockh.cookie != 0)
3016 ldlm_lock_decref(&child_lockh, LCK_EX);
3021 req->rq_status = rc;
3025 static int mds_reint_rename_to_remote(struct mds_update_record *rec, int offset,
3026 struct ptlrpc_request *req)
3028 struct obd_device *obd = req->rq_export->exp_obd;
3029 struct ptlrpc_request *req2 = NULL;
3030 struct dentry *de_srcdir = NULL;
3031 struct dentry *de_old = NULL;
3032 struct mds_obd *mds = mds_req2mds(req);
3033 struct lustre_handle parent_lockh[2] = {{0}, {0}};
3034 struct lustre_handle child_lockh = {0};
3035 struct mdc_op_data *op_data;
3036 int update_mode, rc = 0;
3039 CDEBUG(D_OTHER, "%s: move name %s onto another mds #%lu\n",
3040 obd->obd_name, rec->ur_name, (unsigned long)id_group(rec->ur_id2));
3042 OBD_ALLOC(op_data, sizeof(*op_data));
3043 if (op_data == NULL)
3045 memset(op_data, 0, sizeof(*op_data));
3047 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1, parent_lockh,
3048 &de_srcdir, LCK_PW, MDS_INODELOCK_UPDATE,
3049 &update_mode, rec->ur_name,
3050 rec->ur_namelen, &child_lockh, &de_old,
3051 LCK_EX, MDS_INODELOCK_LOOKUP);
3054 LASSERT(de_srcdir->d_inode);
3058 * we already know the target should be created on another MDS so, we
3059 * have to request that MDS to do it.
3062 /* prepare source id */
3063 if (de_old->d_flags & DCACHE_CROSS_REF) {
3064 LASSERT(de_old->d_inode == NULL);
3065 CDEBUG(D_OTHER, "request to move remote name\n");
3066 mds_pack_dentry2id(obd, &op_data->id1, de_old, 1);
3067 } else if (de_old->d_inode == NULL) {
3068 /* oh, source doesn't exist */
3069 OBD_FREE(op_data, sizeof(*op_data));
3070 GOTO(cleanup, rc = -ENOENT);
3072 struct lustre_id sid;
3073 struct inode *inode = de_old->d_inode;
3075 LASSERT(inode != NULL);
3076 CDEBUG(D_OTHER, "request to move local name\n");
3077 id_ino(&op_data->id1) = inode->i_ino;
3078 id_group(&op_data->id1) = mds->mds_num;
3079 id_gen(&op_data->id1) = inode->i_generation;
3081 down(&inode->i_sem);
3082 rc = mds_read_inode_sid(obd, inode, &sid);
3085 CERROR("Can't read inode self id, "
3086 "inode %lu, rc = %d\n",
3091 id_fid(&op_data->id1) = id_fid(&sid);
3094 op_data->id2 = *rec->ur_id2;
3095 rc = md_rename(mds->mds_md_exp, op_data, NULL, 0,
3096 rec->ur_tgt, rec->ur_tgtlen - 1, &req2);
3097 OBD_FREE(op_data, sizeof(*op_data));
3102 rc = mds_del_local_dentry(rec, offset, req, de_srcdir,
3108 ptlrpc_req_finished(req2);
3111 if (parent_lockh[1].cookie != 0)
3112 ldlm_lock_decref(parent_lockh + 1, update_mode);
3114 ldlm_lock_decref(parent_lockh, LCK_PW);
3115 if (child_lockh.cookie != 0)
3116 ldlm_lock_decref(&child_lockh, LCK_EX);
3121 req->rq_status = rc;
3125 static int mds_reint_rename(struct mds_update_record *rec, int offset,
3126 struct ptlrpc_request *req, struct lustre_handle *lockh)
3128 struct obd_device *obd = req->rq_export->exp_obd;
3129 struct dentry *de_srcdir = NULL;
3130 struct dentry *de_tgtdir = NULL;
3131 struct dentry *de_old = NULL;
3132 struct dentry *de_new = NULL;
3133 struct inode *old_inode = NULL, *new_inode = NULL;
3134 struct mds_obd *mds = mds_req2mds(req);
3135 struct lustre_handle dlm_handles[7] = {{0},{0},{0},{0},{0},{0},{0}};
3136 struct mds_body *body = NULL;
3137 struct llog_create_locks *lcl = NULL;
3138 struct lov_mds_md *lmm = NULL;
3139 int rc = 0, cleanup_phase = 0;
3140 void *handle = NULL;
3143 LASSERT(offset == 1);
3145 DEBUG_REQ(D_INODE, req, "parent "DLID4" %s to "DLID4" %s",
3146 OLID4(rec->ur_id1), rec->ur_name, OLID4(rec->ur_id2),
3149 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
3151 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
3152 DEBUG_REQ(D_HA, req, "rename replay\n");
3153 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
3154 lustre_msg_buf(req->rq_reqmsg, offset + 3, 0),
3155 req->rq_repmsg->buflens[2]);
3158 MD_COUNTER_INCREMENT(obd, rename);
3160 if (rec->ur_namelen == 1) {
3161 rc = mds_reint_rename_create_name(rec, offset, req);
3165 /* check if new name should be located on remote target. */
3166 if (id_group(rec->ur_id2) != mds->mds_num) {
3167 rc = mds_reint_rename_to_remote(rec, offset, req);
3171 rc = mds_get_parents_children_locked(obd, mds, rec->ur_id1, &de_srcdir,
3172 rec->ur_id2, &de_tgtdir, LCK_PW,
3173 rec->ur_name, rec->ur_namelen,
3174 &de_old, rec->ur_tgt,
3175 rec->ur_tgtlen, &de_new,
3176 dlm_handles, LCK_EX);
3180 cleanup_phase = 1; /* parent(s), children, locks */
3181 old_inode = de_old->d_inode;
3182 new_inode = de_new->d_inode;
3184 /* sanity check for src inode */
3185 if (de_old->d_flags & DCACHE_CROSS_REF) {
3186 LASSERT(de_old->d_inode == NULL);
3189 * in the case of cross-ref dir, we can perform this check only
3190 * if child and parent lie on the same mds. This is because
3191 * otherwise they can have the same inode numbers.
3193 if (de_old->d_mdsnum == mds->mds_num) {
3194 if (de_old->d_inum == de_srcdir->d_inode->i_ino ||
3195 de_old->d_inum == de_tgtdir->d_inode->i_ino)
3196 GOTO(cleanup, rc = -EINVAL);
3199 LASSERT(de_old->d_inode != NULL);
3200 if (de_old->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
3201 de_old->d_inode->i_ino == de_tgtdir->d_inode->i_ino)
3202 GOTO(cleanup, rc = -EINVAL);
3205 /* sanity check for dest inode */
3206 if (de_new->d_flags & DCACHE_CROSS_REF) {
3207 LASSERT(new_inode == NULL);
3209 /* the same check about target dentry. */
3210 if (de_new->d_mdsnum == mds->mds_num) {
3211 if (de_new->d_inum == de_srcdir->d_inode->i_ino ||
3212 de_new->d_inum == de_tgtdir->d_inode->i_ino)
3213 GOTO(cleanup, rc = -EINVAL);
3217 * regular files usualy do not have ->rename() implemented. But
3218 * we handle only this case when @de_new is cross-ref entry,
3219 * because in other cases it will be handled by vfs_rename().
3221 if (de_old->d_inode && (!de_old->d_inode->i_op ||
3222 !de_old->d_inode->i_op->rename))
3223 GOTO(cleanup, rc = -EPERM);
3226 (new_inode->i_ino == de_srcdir->d_inode->i_ino ||
3227 new_inode->i_ino == de_tgtdir->d_inode->i_ino))
3228 GOTO(cleanup, rc = -EINVAL);
3232 /* check if inodes point to each other. */
3233 if (!(de_old->d_flags & DCACHE_CROSS_REF) &&
3234 !(de_new->d_flags & DCACHE_CROSS_REF) &&
3235 old_inode == new_inode)
3236 GOTO(cleanup, rc = 0);
3238 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
3240 * check if we are moving old entry into its child. 2.6 does not check
3241 * for this in vfs_rename() anymore.
3243 if (is_subdir(de_new, de_old))
3244 GOTO(cleanup, rc = -EINVAL);
3248 * if we are about to remove the target at first, pass the EA of that
3249 * inode to client to perform and cleanup on OST.
3251 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
3252 LASSERT(body != NULL);
3254 /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
3256 DOWN_READ_I_ALLOC_SEM(new_inode);
3258 cleanup_phase = 2; /* up(&new_inode->i_sem) when finished */
3260 if (new_inode && ((S_ISDIR(new_inode->i_mode) &&
3261 new_inode->i_nlink == 2) ||
3262 new_inode->i_nlink == 1)) {
3263 if (mds_orphan_open_count(new_inode) > 0) {
3264 /* need to lock pending_dir before transaction */
3265 down(&mds->mds_pending_dir->d_inode->i_sem);
3266 cleanup_phase = 3; /* up(&pending_dir->i_sem) */
3267 } else if (S_ISREG(new_inode->i_mode)) {
3268 mds_pack_inode2body(obd, body, new_inode, 0);
3269 mds_pack_md(obd, req->rq_repmsg, 1, body,
3270 new_inode, MDS_PACK_MD_LOCK);
3274 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
3275 de_srcdir->d_inode->i_sb);
3277 if (de_old->d_flags & DCACHE_CROSS_REF) {
3278 struct lustre_id old_id;
3280 mds_pack_dentry2id(obd, &old_id, de_old, 1);
3282 rc = mds_add_local_dentry(rec, offset, req, &old_id,
3287 rc = mds_del_local_dentry(rec, offset, req, de_srcdir,
3292 lmm = lustre_msg_buf(req->rq_repmsg, 1, 0);
3293 handle = fsfilt_start_log(obd, de_tgtdir->d_inode, FSFILT_OP_RENAME,
3294 NULL, le32_to_cpu(lmm->lmm_stripe_count));
3297 GOTO(cleanup, rc = PTR_ERR(handle));
3300 de_old->d_fsdata = req;
3301 de_new->d_fsdata = req;
3302 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
3305 if (rc == 0 && new_inode != NULL && new_inode->i_nlink == 0) {
3306 if (mds_orphan_open_count(new_inode) > 0)
3307 rc = mds_orphan_add_link(rec, obd, de_new);
3310 GOTO(cleanup, rc = 0);
3312 if (!S_ISREG(new_inode->i_mode))
3315 if (!(body->valid & OBD_MD_FLEASIZE)) {
3316 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
3317 OBD_MD_FLATIME | OBD_MD_FLMTIME);
3318 } else if (mds_log_op_unlink(obd, new_inode,
3319 lustre_msg_buf(req->rq_repmsg,1,0),
3320 req->rq_repmsg->buflens[1],
3321 lustre_msg_buf(req->rq_repmsg,2,0),
3322 req->rq_repmsg->buflens[2],
3324 body->valid |= OBD_MD_FLCOOKIE;
3330 rc = mds_finish_transno(mds, (de_tgtdir ? de_tgtdir->d_inode : NULL),
3331 handle, req, rc, 0);
3333 switch (cleanup_phase) {
3335 up(&mds->mds_pending_dir->d_inode->i_sem);
3338 UP_READ_I_ALLOC_SEM(new_inode);
3341 if (dlm_handles[5].cookie != 0)
3342 ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
3343 if (dlm_handles[6].cookie != 0)
3344 ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
3347 ptlrpc_save_llog_lock(req, lcl);
3350 if (dlm_handles[3].cookie != 0)
3351 ldlm_lock_decref(&(dlm_handles[3]), LCK_EX);
3352 ldlm_lock_decref(&(dlm_handles[2]), LCK_EX);
3353 ldlm_lock_decref(&(dlm_handles[1]), LCK_PW);
3354 ldlm_lock_decref(&(dlm_handles[0]), LCK_PW);
3356 if (dlm_handles[3].cookie != 0)
3357 ptlrpc_save_lock(req,&(dlm_handles[3]), LCK_EX);
3358 ptlrpc_save_lock(req, &(dlm_handles[2]), LCK_EX);
3359 ptlrpc_save_lock(req, &(dlm_handles[1]), LCK_PW);
3360 ptlrpc_save_lock(req, &(dlm_handles[0]), LCK_PW);
3369 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
3372 req->rq_status = rc;
3376 typedef int (*mds_reinter)(struct mds_update_record *, int offset,
3377 struct ptlrpc_request *, struct lustre_handle *);
3379 static mds_reinter reinters[REINT_MAX + 1] = {
3380 [REINT_SETATTR] mds_reint_setattr,
3381 [REINT_CREATE] mds_reint_create,
3382 [REINT_LINK] mds_reint_link,
3383 [REINT_UNLINK] mds_reint_unlink,
3384 [REINT_RENAME] mds_reint_rename,
3385 [REINT_OPEN] mds_open
3388 int mds_reint_rec(struct mds_update_record *rec, int offset,
3389 struct ptlrpc_request *req, struct lustre_handle *lockh)
3391 struct obd_device *obd = req->rq_export->exp_obd;
3392 struct lvfs_run_ctxt saved;
3395 /* checked by unpacker */
3396 LASSERT(rec->ur_opcode <= REINT_MAX &&
3397 reinters[rec->ur_opcode] != NULL);
3399 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
3400 rc = reinters[rec->ur_opcode] (rec, offset, req, lockh);
3401 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);