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/namei.h>
36 #include <linux/ext3_fs.h>
37 #include <linux/obd_support.h>
38 #include <linux/obd_class.h>
39 #include <linux/obd.h>
40 #include <linux/lustre_lib.h>
41 #include <linux/lustre_idl.h>
42 #include <linux/lustre_mds.h>
43 #include <linux/lustre_dlm.h>
44 #include <linux/lustre_log.h>
45 #include <linux/lustre_fsfilt.h>
46 #include <linux/lustre_acl.h>
47 #include <linux/lustre_lite.h>
48 #include <linux/lustre_smfs.h>
49 #include "mds_internal.h"
51 struct mds_logcancel_data {
52 struct lov_mds_md *mlcd_lmm;
56 struct llog_cookie mlcd_cookies[0];
59 static void mds_cancel_cookies_cb(struct obd_device *obd,
60 __u64 transno, void *cb_data,
63 struct mds_logcancel_data *mlcd = cb_data;
64 struct lov_stripe_md *lsm = NULL;
65 struct llog_ctxt *ctxt;
68 obd_transno_commit_cb(obd, transno, error);
70 CDEBUG(D_HA, "cancelling %d cookies\n",
71 (int)(mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies)));
73 rc = obd_unpackmd(obd->u.mds.mds_dt_exp, &lsm, mlcd->mlcd_lmm,
74 mlcd->mlcd_eadatalen);
76 CERROR("bad LSM cancelling %d log cookies: rc %d\n",
77 (int)(mlcd->mlcd_cookielen/sizeof(*mlcd->mlcd_cookies)),
80 ///* XXX 0 normally, SENDNOW for debug */);
81 ctxt = llog_get_context(&obd->obd_llogs,
82 mlcd->mlcd_cookies[0].lgc_subsys + 1);
83 rc = llog_cancel(ctxt, mlcd->mlcd_cookielen /
84 sizeof(*mlcd->mlcd_cookies),
85 mlcd->mlcd_cookies, OBD_LLOG_FL_SENDNOW, lsm);
87 CERROR("error cancelling %d log cookies: rc %d\n",
88 (int)(mlcd->mlcd_cookielen /
89 sizeof(*mlcd->mlcd_cookies)), rc);
90 obd_free_memmd(obd->u.mds.mds_dt_exp, &lsm);
93 OBD_FREE(mlcd, mlcd->mlcd_size);
96 /* Assumes caller has already pushed us into the kernel context. */
97 int mds_finish_transno(struct mds_obd *mds, struct inode *inode, void *handle,
98 struct ptlrpc_request *req, int rc, __u32 op_data)
100 struct mds_export_data *med = &req->rq_export->exp_mds_data;
101 struct obd_device *obd = req->rq_export->exp_obd;
102 struct mds_client_data *mcd = med->med_mcd;
103 int err, log_pri = D_HA;
108 /* if the export has already been failed, we have no last_rcvd slot */
109 if (req->rq_export->exp_failed) {
110 CERROR("committing transaction for disconnected client\n");
112 GOTO(out_commit, rc);
119 if (handle == NULL) {
120 /* if we're starting our own xaction, use our own inode */
121 inode = mds->mds_rcvd_filp->f_dentry->d_inode;
122 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
123 if (IS_ERR(handle)) {
124 CERROR("fsfilt_start: %ld\n", PTR_ERR(handle));
125 RETURN(PTR_ERR(handle));
131 transno = req->rq_reqmsg->transno;
133 LASSERTF(transno == 0, "BUG 3934, t"LPU64" rc %d\n", transno, rc);
134 } else if (transno == 0) {
135 spin_lock(&mds->mds_transno_lock);
136 transno = ++mds->mds_last_transno;
137 spin_unlock(&mds->mds_transno_lock);
139 spin_lock(&mds->mds_transno_lock);
140 if (transno > mds->mds_last_transno)
141 mds->mds_last_transno = transno;
142 spin_unlock(&mds->mds_transno_lock);
144 req->rq_repmsg->transno = req->rq_transno = transno;
145 if (req->rq_reqmsg->opc == MDS_CLOSE) {
146 mcd->mcd_last_close_transno = cpu_to_le64(transno);
147 mcd->mcd_last_close_xid = cpu_to_le64(req->rq_xid);
148 mcd->mcd_last_close_result = cpu_to_le32(rc);
149 mcd->mcd_last_close_data = cpu_to_le32(op_data);
151 mcd->mcd_last_transno = cpu_to_le64(transno);
152 mcd->mcd_last_xid = cpu_to_le64(req->rq_xid);
153 mcd->mcd_last_result = cpu_to_le32(rc);
154 mcd->mcd_last_data = cpu_to_le32(op_data);
157 fsfilt_add_journal_cb(obd, mds->mds_sb, transno, handle,
158 mds_commit_last_transno_cb, NULL);
160 err = fsfilt_write_record(obd, mds->mds_rcvd_filp, mcd,
161 sizeof(*mcd), &off, 0);
169 DEBUG_REQ(log_pri, req,
170 "wrote trans #"LPU64" client %s at idx %u: err = %d",
171 transno, mcd->mcd_uuid, med->med_idx, err);
173 err = mds_update_last_fid(obd, handle, 0);
180 err = mds_dt_write_objids(obd);
186 CDEBUG(log_pri, "wrote objids: err = %d\n", err);
190 err = fsfilt_commit(obd, mds->mds_sb, inode, handle,
191 req->rq_export->exp_sync);
193 CERROR("error committing transaction: %d\n", err);
201 /* this gives the same functionality as the code between
202 * sys_chmod and inode_setattr
203 * chown_common and inode_setattr
204 * utimes and inode_setattr
207 /* Just for the case if we have some clients that know about ATTR_RAW */
208 #define ATTR_RAW 8192
210 int mds_fix_attr(struct inode *inode, struct mds_update_record *rec)
212 time_t now = LTIME_S(CURRENT_TIME);
213 struct iattr *attr = &rec->ur_iattr;
214 unsigned int ia_valid = attr->ia_valid;
218 /* only fix up attrs if the client VFS didn't already */
220 if (!(ia_valid & ATTR_RAW))
223 if (!(ia_valid & ATTR_CTIME_SET))
224 LTIME_S(attr->ia_ctime) = now;
225 if (!(ia_valid & ATTR_ATIME_SET))
226 LTIME_S(attr->ia_atime) = now;
227 if (!(ia_valid & ATTR_MTIME_SET))
228 LTIME_S(attr->ia_mtime) = now;
230 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
234 if ((ia_valid & (ATTR_MTIME|ATTR_ATIME)) == (ATTR_MTIME|ATTR_ATIME)) {
235 if (rec->ur_fsuid != inode->i_uid &&
236 (error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
240 if (ia_valid & ATTR_SIZE) {
241 if ((error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
245 if (ia_valid & ATTR_UID) {
248 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
250 if (attr->ia_uid == (uid_t) -1)
251 attr->ia_uid = inode->i_uid;
252 if (attr->ia_gid == (gid_t) -1)
253 attr->ia_gid = inode->i_gid;
254 attr->ia_mode = inode->i_mode;
256 * If the user or group of a non-directory has been
257 * changed by a non-root user, remove the setuid bit.
258 * 19981026 David C Niemi <niemi@tux.org>
260 * Changed this to apply to all users, including root,
261 * to avoid some races. This is the behavior we had in
262 * 2.0. The check for non-root was definitely wrong
263 * for 2.2 anyway, as it should have been using
264 * CAP_FSETID rather than fsuid -- 19990830 SD.
266 if ((inode->i_mode & S_ISUID) == S_ISUID &&
267 !S_ISDIR(inode->i_mode)) {
268 attr->ia_mode &= ~S_ISUID;
269 attr->ia_valid |= ATTR_MODE;
272 * Likewise, if the user or group of a non-directory
273 * has been changed by a non-root user, remove the
274 * setgid bit UNLESS there is no group execute bit
275 * (this would be a file marked for mandatory
276 * locking). 19981026 David C Niemi <niemi@tux.org>
278 * Removed the fsuid check (see the comment above) --
281 if (((inode->i_mode & (S_ISGID | S_IXGRP)) ==
282 (S_ISGID | S_IXGRP)) && !S_ISDIR(inode->i_mode)) {
283 attr->ia_mode &= ~S_ISGID;
284 attr->ia_valid |= ATTR_MODE;
286 } else if (ia_valid & ATTR_MODE) {
287 int mode = attr->ia_mode;
289 if (attr->ia_mode == (mode_t) -1)
290 attr->ia_mode = inode->i_mode;
292 (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
297 void mds_steal_ack_locks(struct ptlrpc_request *req)
299 struct obd_export *exp = req->rq_export;
300 char str[PTL_NALFMT_SIZE];
301 struct list_head *tmp;
302 struct ptlrpc_reply_state *oldrep;
303 struct ptlrpc_service *svc;
304 struct llog_create_locks *lcl;
308 /* CAVEAT EMPTOR: spinlock order */
309 spin_lock_irqsave (&exp->exp_lock, flags);
310 list_for_each (tmp, &exp->exp_outstanding_replies) {
311 oldrep = list_entry(tmp, struct ptlrpc_reply_state,rs_exp_list);
313 if (oldrep->rs_xid != req->rq_xid)
316 if (oldrep->rs_msg->opc != req->rq_reqmsg->opc)
317 CERROR ("Resent req xid "LPX64" has mismatched opc: "
318 "new %d old %d\n", req->rq_xid,
319 req->rq_reqmsg->opc, oldrep->rs_msg->opc);
321 svc = oldrep->rs_srv_ni->sni_service;
322 spin_lock (&svc->srv_lock);
324 list_del_init (&oldrep->rs_exp_list);
326 CWARN("Stealing %d locks from rs %p x"LPD64".t"LPD64
327 " o%d NID %s\n", oldrep->rs_nlocks, oldrep,
328 oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_msg->opc,
329 ptlrpc_peernid2str(&exp->exp_connection->c_peer, str));
331 for (i = 0; i < oldrep->rs_nlocks; i++)
332 ptlrpc_save_lock(req,
333 &oldrep->rs_locks[i],
334 oldrep->rs_modes[i]);
335 oldrep->rs_nlocks = 0;
337 lcl = oldrep->rs_llog_locks;
338 oldrep->rs_llog_locks = NULL;
340 ptlrpc_save_llog_lock(req, lcl);
342 DEBUG_REQ(D_HA, req, "stole locks for");
343 ptlrpc_schedule_difficult_reply (oldrep);
345 spin_unlock (&svc->srv_lock);
346 spin_unlock_irqrestore (&exp->exp_lock, flags);
349 spin_unlock_irqrestore (&exp->exp_lock, flags);
352 void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd)
354 if (req->rq_reqmsg->opc == MDS_CLOSE) {
355 DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
356 mcd->mcd_last_close_transno, mcd->mcd_last_close_result);
357 req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_close_transno;
358 req->rq_repmsg->status = req->rq_status = mcd->mcd_last_close_result;
360 DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
361 mcd->mcd_last_transno, mcd->mcd_last_result);
362 req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_transno;
363 req->rq_repmsg->status = req->rq_status = mcd->mcd_last_result;
366 mds_steal_ack_locks(req);
369 static void reconstruct_reint_setattr(struct mds_update_record *rec,
370 int offset, struct ptlrpc_request *req)
372 struct mds_export_data *med = &req->rq_export->exp_mds_data;
373 struct mds_body *body;
376 mds_req_from_mcd(req, med->med_mcd);
378 de = mds_id2dentry(req2obd(req), rec->ur_id1, NULL);
380 LASSERT(PTR_ERR(de) == req->rq_status);
384 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
385 mds_pack_inode2body(req2obd(req), body, de->d_inode, 1);
387 /* Don't return OST-specific attributes if we didn't just set them */
388 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
389 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
390 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
391 body->valid |= OBD_MD_FLMTIME;
392 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
393 body->valid |= OBD_MD_FLATIME;
398 static int mds_reint_remote_setfacl(struct obd_device *obd,
399 struct mds_export_data *med,
400 struct mds_update_record *rec,
401 struct ptlrpc_request *req)
403 struct rmtacl_upcall_desc desc;
406 struct mds_body *body;
408 int repsize[2] = { sizeof(*body), LUSTRE_ACL_SIZE_MAX };
411 rc = lustre_pack_reply(req, 2, repsize, NULL);
415 de = mds_id2dentry(obd, rec->ur_id1, NULL);
417 GOTO(out, rc = PTR_ERR(de));
422 /* setxattr from remote client:
424 memset(&desc, 0, sizeof(desc));
425 desc.cmd = (char *) rec->ur_ea2data;
426 desc.cmdlen = rec->ur_ea2datalen;
427 desc.res = lustre_msg_buf(req->rq_repmsg, 1, LUSTRE_ACL_SIZE_MAX);
428 desc.reslen = LUSTRE_ACL_SIZE_MAX;
430 mds_do_remote_acl_upcall(&desc);
431 if (desc.upcall_status)
432 GOTO(out_put, rc = desc.upcall_status);
435 desc.status = -desc.status;
437 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
440 /* client (lmv) will do limited checking upon replied mds_body,
441 * we pack it as normal, but "steal" field "flags" field to store
442 * the acl execution status.
444 mds_pack_inode2body(obd, body, inode, 1);
445 body->flags = desc.status;
446 mds_body_do_reverse_map(med, body);
456 static int mds_get_md_type(char *name)
458 if (!strcmp(name, XATTR_LUSTRE_MDS_LOV_EA))
460 if (!strcmp(name, XATTR_LUSTRE_MDS_MEA_EA))
462 if (!strcmp(name, XATTR_LUSTRE_MDS_SID_EA))
464 if (!strcmp(name, XATTR_LUSTRE_MDS_PID_EA))
466 if (!strcmp(name, XATTR_LUSTRE_MDS_KEY_EA))
472 /* In the raw-setattr case, we lock the child inode.
473 * In the write-back case or if being called from open, the client holds a lock
476 * We use the ATTR_FROM_OPEN flag to tell these cases apart. */
477 static int mds_reint_setattr(struct mds_update_record *rec, int offset,
478 struct ptlrpc_request *req, struct lustre_handle *lh)
480 struct mds_obd *mds = mds_req2mds(req);
481 struct obd_device *obd = req->rq_export->exp_obd;
482 struct mds_export_data *med = &req->rq_export->u.eu_mds_data;
483 struct mds_body *body;
484 struct dentry *de = NULL;
485 struct inode *inode = NULL;
486 struct lustre_handle lockh[2] = {{0}, {0}};
489 struct mds_logcancel_data *mlcd = NULL;
490 int rc = 0, cleanup_phase = 0, err;
491 int repsize = sizeof(*body), locked = 0;
494 LASSERT(offset == 1);
496 DEBUG_REQ(D_INODE, req, "setattr "LPU64"/%u %x",
497 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
498 rec->ur_iattr.ia_valid);
500 /* remote setfacl need special handling */
501 if ((rec->ur_iattr.ia_valid & ATTR_EA) &&
502 !strcmp(rec->ur_eadata, XATTR_NAME_LUSTRE_ACL)) {
503 return mds_reint_remote_setfacl(obd, med, rec, req);
506 rc = lustre_pack_reply(req, 1, &repsize, NULL);
510 MDS_CHECK_RESENT(req, reconstruct_reint_setattr(rec, offset, req));
511 MD_COUNTER_INCREMENT(obd, setattr);
513 if (med->med_remote) {
514 if (rec->ur_iattr.ia_valid & ATTR_GID) {
515 CWARN("Deny chgrp from remote client\n");
516 GOTO(cleanup, rc = -EPERM);
518 if (rec->ur_iattr.ia_valid & ATTR_UID) {
521 uid = mds_idmap_lookup_uid(med->med_idmap, 0,
522 rec->ur_iattr.ia_uid);
523 if (uid == MDS_IDMAP_NOTFOUND) {
524 CWARN("Deny chown to uid %u\n",
525 rec->ur_iattr.ia_uid);
526 GOTO(cleanup, rc = -EPERM);
528 rec->ur_iattr.ia_uid = uid;
532 if (rec->ur_iattr.ia_valid & ATTR_FROM_OPEN) {
533 de = mds_id2dentry(obd, rec->ur_id1, NULL);
535 GOTO(cleanup, rc = PTR_ERR(de));
537 __u64 lockpart = MDS_INODELOCK_UPDATE;
538 if (rec->ur_iattr.ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID))
539 lockpart |= MDS_INODELOCK_LOOKUP;
540 de = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW,
541 lockh, &parent_mode, NULL, 0, lockpart);
543 GOTO(cleanup, rc = PTR_ERR(de));
551 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
552 rec->ur_eadata != NULL)
555 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb);
557 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
559 GOTO(cleanup, rc = PTR_ERR(handle));
561 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
562 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n",
563 LTIME_S(rec->ur_iattr.ia_mtime),
564 LTIME_S(rec->ur_iattr.ia_ctime));
565 rc = mds_fix_attr(inode, rec);
569 if (rec->ur_iattr.ia_valid & ATTR_ATTR_FLAG) /* ioctl */
570 rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_SETFLAGS,
571 (long)&rec->ur_iattr.ia_attr_flags);
573 rc = fsfilt_setattr(obd, de, handle, &rec->ur_iattr, 0);
576 if (rec->ur_iattr.ia_valid & ATTR_EA) {
577 int flags = (int) rec->ur_iattr.ia_attr_flags;
580 if (!med->med_remote && inode->i_op &&
581 inode->i_op->setxattr)
582 rc = inode->i_op->setxattr(
587 } else if (rec->ur_iattr.ia_valid & ATTR_EA_RM) {
589 if (inode->i_op && inode->i_op->removexattr)
590 rc = inode->i_op->removexattr(de,
592 } else if (rec->ur_iattr.ia_valid & ATTR_EA_CMOBD) {
596 /* tmp fix for cmobd set md reint */
597 LASSERT(rec->ur_eadata != NULL);
598 LASSERT(rec->ur_ea2data != NULL);
599 name = rec->ur_eadata;
601 CDEBUG(D_INFO, "set %s EA for cmobd \n", name);
603 type = mds_get_md_type(name);
605 rc = fsfilt_set_md(obd, inode, handle,
607 rec->ur_ea2datalen, type);
611 } else if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
612 !((rec->ur_iattr.ia_valid & ATTR_KEY) ||
613 (rec->ur_iattr.ia_valid & ATTR_MAC))) {
614 struct lov_stripe_md *lsm = NULL;
615 struct lov_user_md *lum = NULL;
617 if (rec->ur_eadata != NULL) {
618 rc = ll_permission(inode, MAY_WRITE, NULL);
622 lum = rec->ur_eadata;
624 /* if lmm_stripe_size is -1 delete default
626 if (S_ISDIR(inode->i_mode) &&
627 lum->lmm_stripe_size == (typeof(lum->lmm_stripe_size))(-1)){
628 rc = fsfilt_set_md(obd, inode, handle, NULL, 0, EA_LOV);
632 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
634 &lsm, rec->ur_eadata);
638 obd_free_memmd(mds->mds_dt_exp, &lsm);
639 rc = fsfilt_set_md(obd, inode, handle, rec->ur_eadata,
640 rec->ur_eadatalen, EA_LOV);
646 if ((rec->ur_iattr.ia_valid & ATTR_KEY) ||
647 (rec->ur_iattr.ia_valid & ATTR_MAC)) {
650 LASSERT(rec->ur_eadatalen || rec->ur_ea3datalen);
651 LASSERT(rec->ur_eadata || rec->ur_ea3data);
652 key = rec->ur_eadata ? rec->ur_eadata : rec->ur_ea3data;
653 keylen = rec->ur_eadatalen ? rec->ur_eadatalen :
655 mds_set_gskey(obd, handle, inode, key, keylen,
656 rec->ur_iattr.ia_valid);
660 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
661 mds_pack_inode2body(obd, body, inode, 1);
663 /* Don't return OST-specific attributes if we didn't just set them */
664 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
665 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
666 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
667 body->valid |= OBD_MD_FLMTIME;
668 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
669 body->valid |= OBD_MD_FLATIME;
671 mds_body_do_reverse_map(med, body);
673 /* The logcookie should be no use anymore, why nobody remove
674 * following code block?
676 LASSERT(rec->ur_cookielen == 0);
677 if (rc == 0 && rec->ur_cookielen && !IS_ERR(mds->mds_dt_obd)) {
678 OBD_ALLOC(mlcd, sizeof(*mlcd) + rec->ur_cookielen +
681 mlcd->mlcd_size = sizeof(*mlcd) + rec->ur_cookielen +
683 mlcd->mlcd_eadatalen = rec->ur_eadatalen;
684 mlcd->mlcd_cookielen = rec->ur_cookielen;
685 mlcd->mlcd_lmm = (void *)&mlcd->mlcd_cookies +
686 mlcd->mlcd_cookielen;
687 memcpy(&mlcd->mlcd_cookies, rec->ur_logcookies,
688 mlcd->mlcd_cookielen);
689 memcpy(mlcd->mlcd_lmm, rec->ur_eadata,
690 mlcd->mlcd_eadatalen);
692 CERROR("unable to allocate log cancel data\n");
698 fsfilt_add_journal_cb(req->rq_export->exp_obd, mds->mds_sb, 0,
699 handle, mds_cancel_cookies_cb, mlcd);
700 err = mds_finish_transno(mds, inode, handle, req, rc, 0);
701 switch (cleanup_phase) {
703 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
704 rec->ur_eadata != NULL)
709 if (lockh[1].cookie != 0)
710 ldlm_lock_decref(lockh + 1, parent_mode);
713 ldlm_lock_decref(lockh, LCK_PW);
715 ptlrpc_save_lock (req, lockh, LCK_PW);
730 static void reconstruct_reint_create(struct mds_update_record *rec, int offset,
731 struct ptlrpc_request *req)
733 struct mds_export_data *med = &req->rq_export->exp_mds_data;
734 struct dentry *parent, *child;
735 struct mds_body *body;
738 mds_req_from_mcd(req, med->med_mcd);
740 if (req->rq_status) {
745 parent = mds_id2dentry(req2obd(req), rec->ur_id1, NULL);
746 LASSERT(!IS_ERR(parent));
747 child = ll_lookup_one_len(rec->ur_name, parent,
748 rec->ur_namelen - 1);
749 LASSERT(!IS_ERR(child));
750 if ((child->d_flags & DCACHE_CROSS_REF)) {
751 LASSERTF(child->d_inode == NULL, "BUG 3869\n");
752 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
753 mds_pack_dentry2body(req2obd(req), body, child, 1);
754 } else if (child->d_inode == NULL) {
755 DEBUG_REQ(D_ERROR, req, "parent "DLID4" name %s mode %o",
756 OLID4(rec->ur_id1), rec->ur_name, rec->ur_mode);
757 LASSERTF(child->d_inode != NULL, "BUG 3869\n");
759 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
760 mds_pack_inode2body(req2obd(req), body, child->d_inode, 1);
767 static int mds_get_default_acl(struct inode *dir, void **pacl)
769 struct dentry de = { .d_inode = dir };
772 LASSERT(S_ISDIR(dir->i_mode));
774 if (!dir->i_op->getxattr)
777 size = dir->i_op->getxattr(&de, XATTR_NAME_ACL_DEFAULT, NULL, 0);
778 if (size == 0 || size == -ENODATA || size == -EOPNOTSUPP)
783 OBD_ALLOC(*pacl, size);
787 size2 = dir->i_op->getxattr(&de, XATTR_NAME_ACL_DEFAULT, *pacl, size);
789 /* since we already locked the dir, it should not change
790 * between the 2 getxattr calls
792 CERROR("2'nd getxattr got %d, expect %d\n", size2, size);
793 OBD_FREE(*pacl, size);
800 static int mds_reint_create(struct mds_update_record *rec, int offset,
801 struct ptlrpc_request *req,
802 struct lustre_handle *lh)
804 struct dentry *dparent = NULL;
805 struct mds_obd *mds = mds_req2mds(req);
806 struct obd_device *obd = req->rq_export->exp_obd;
807 struct mds_body *body = NULL;
808 struct dentry *dchild = NULL;
809 struct inode *dir = NULL;
811 struct lustre_handle lockh[2] = {{0}, {0}};
813 int rc = 0, err, type = rec->ur_mode & S_IFMT, cleanup_phase = 0;
815 struct dentry_params dp;
816 struct mea *mea = NULL;
818 struct lustre_id sid;
822 LASSERT(offset == 1);
824 LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name,
825 OBD_MDS_DEVICENAME));
827 DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u name %s mode %o",
828 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
829 rec->ur_name, rec->ur_mode);
831 MDS_CHECK_RESENT(req, reconstruct_reint_create(rec, offset, req));
833 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
834 GOTO(cleanup, rc = -ESTALE);
836 dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW,
837 lockh, &parent_mode, rec->ur_name,
838 rec->ur_namelen - 1, MDS_INODELOCK_UPDATE);
839 if (IS_ERR(dparent)) {
840 rc = PTR_ERR(dparent);
841 CERROR("parent lookup error %d, id "DLID4"\n",
842 rc, OLID4(rec->ur_id1));
845 cleanup_phase = 1; /* locked parent dentry */
846 dir = dparent->d_inode;
849 ldlm_lock_dump_handle(D_OTHER, lockh);
851 /* get parent id: ldlm lock on the parent protects ea */
852 rc = mds_read_inode_sid(obd, dir, &sid);
854 CERROR("can't read parent id. ino(%lu) rc(%d)\n",
859 /* try to retrieve MEA data for this dir */
860 rc = mds_md_get_attr(obd, dparent->d_inode, &mea, &mea_size);
864 if (mea != NULL && mea->mea_count) {
866 * dir is already splitted, check is requested filename should
867 * live at this MDS or at another one.
869 int i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
870 if (mea->mea_master != id_group(&mea->mea_ids[i])) {
871 CDEBUG(D_OTHER, "inapropriate MDS(%d) for %lu/%u:%s."
872 " should be %lu(%d)\n",
873 mea->mea_master, dparent->d_inode->i_ino,
874 dparent->d_inode->i_generation, rec->ur_name,
875 (unsigned long)id_group(&mea->mea_ids[i]), i);
876 GOTO(cleanup, rc = -ERESTART);
880 dchild = ll_lookup_one_len(rec->ur_name, dparent,
881 rec->ur_namelen - 1);
882 if (IS_ERR(dchild)) {
883 rc = PTR_ERR(dchild);
884 CERROR("Can't find "DLID4"/%s, error %d\n",
885 OLID4(rec->ur_id1), rec->ur_name, rc);
889 cleanup_phase = 2; /* child dentry */
891 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb);
893 if (type == S_IFREG || type == S_IFDIR) {
894 rc = mds_try_to_split_dir(obd, dparent, &mea, 0, parent_mode);
895 CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d/%d\n",
896 obd->obd_name, dparent->d_inode->i_ino,
897 dparent->d_inode->i_generation, rc, parent_mode);
899 /* dir got splitted */
900 GOTO(cleanup, rc = -ERESTART);
902 /* error happened during spitting. */
907 if (dir->i_mode & S_ISGID) {
908 if (S_ISDIR(rec->ur_mode))
909 rec->ur_mode |= S_ISGID;
912 /* for reint case stor ecookie should be zero */
913 if (rec->ur_flags & MDS_REINT_REQ) {
914 LASSERT(id_ino(rec->ur_id1) == 0);
915 LASSERT(id_ino(rec->ur_id2) == 0);
918 if (id_fid(rec->ur_id2))
919 fid = id_fid(rec->ur_id2);
921 fid = mds_alloc_fid(obd);
923 dchild->d_fsdata = (void *)&dp;
924 dp.p_inum = (unsigned long)id_ino(rec->ur_id2);
928 dp.p_group = mds->mds_num;
930 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
934 handle = fsfilt_start(obd, dir, FSFILT_OP_CREATE, NULL);
936 GOTO(cleanup, rc = PTR_ERR(handle));
937 rc = ll_vfs_create(dir, dchild, rec->ur_mode, NULL);
939 /* XXX: here we should check what type of EA is in ur_eadata
940 * and do appropriate actions. --umka */
941 if (rec->ur_eadata && rec->ur_eadatalen &&
942 rc == 0 && dchild->d_inode != NULL) {
943 if (rec->ur_flags & MDS_REINT_REQ) {
944 /* for CMOBD to set lov md info when cmobd reint
946 CDEBUG(D_INFO, "set lsm %p, len %d to inode %lu \n",
947 rec->ur_eadata, rec->ur_eadatalen,
948 dchild->d_inode->i_ino);
949 fsfilt_set_md(obd, dchild->d_inode, handle, rec->ur_eadata,
950 rec->ur_eadatalen, EA_LOV);
952 /* assumption: when ur_eadata is not NULL,
953 * ur_eadata is crypto key, should fix it later,
955 mds_set_gskey(obd, handle, dchild->d_inode,
956 rec->ur_eadata, rec->ur_eadatalen,
957 ATTR_MAC | ATTR_KEY);
966 * as Peter asked, mkdir() should distribute new directories
967 * over the whole cluster in order to distribute namespace
968 * processing load. first, we calculate which MDS to use to put
969 * new directory's inode in.
972 /* XXX: here we order mds_choose_mdsnum() to use local mdsnum
973 * for reint requests. This should be gone when real flushing on
974 * LMV is fixed. --umka */
975 i = mds_choose_mdsnum(obd, rec->ur_name, rec->ur_namelen - 1,
976 rec->ur_flags, &req->rq_peer, dir,
977 (rec->ur_flags & MDS_REINT_REQ));
979 if (i == mds->mds_num) {
980 /* inode will be created locally */
981 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
983 GOTO(cleanup, rc = PTR_ERR(handle));
985 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
988 "Can't create dir \"%s\", rc = %d\n",
989 dchild->d_name.name, rc);
993 } else if (!DENTRY_VALID(dchild)) {
994 /* inode will be created on another MDS */
995 struct obdo *oa = NULL;
999 /* first, create that inode */
1002 GOTO(cleanup, rc = -ENOMEM);
1007 if (rec->ur_eadata) {
1008 /* user asks for creating splitted dir */
1009 oa->o_easize = *((u16 *) rec->ur_eadata);
1012 obdo_from_inode(oa, dir, OBD_MD_FLATIME |
1013 OBD_MD_FLMTIME | OBD_MD_FLCTIME);
1015 /* adjust the uid/gid/mode bits */
1016 oa->o_mode = rec->ur_mode;
1017 oa->o_uid = current->fsuid;
1018 oa->o_gid = (dir->i_mode & S_ISGID) ?
1019 dir->i_gid : current->fsgid;
1021 /* letting remote MDS know that this is reint
1023 if (rec->ur_flags & MDS_REINT_REQ)
1024 oa->o_flags |= OBD_FL_REINT;
1026 /* transfer parent id to remote inode */
1027 memcpy(obdo_id(oa), &sid, sizeof(sid));
1028 oa->o_valid |= OBD_MD_FLTYPE | OBD_MD_FLUID |
1029 OBD_MD_FLGID | OBD_MD_FLIFID;
1031 CDEBUG(D_OTHER, "%s: create dir on MDS %u\n",
1034 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1036 * here inode number and generation are
1037 * important, as this is replay request and we
1038 * need them to check if such an object is
1041 CDEBUG(D_HA, "%s: replay dir creation %*s -> %u/%u\n",
1042 obd->obd_name, rec->ur_namelen - 1,
1043 rec->ur_name, (unsigned)id_ino(rec->ur_id2),
1044 (unsigned)id_gen(rec->ur_id2));
1045 oa->o_id = id_ino(rec->ur_id2);
1046 oa->o_fid = id_fid(rec->ur_id2);
1047 oa->o_generation = id_gen(rec->ur_id2);
1048 oa->o_flags |= OBD_FL_RECREATE_OBJS;
1049 LASSERT(oa->o_fid != 0);
1052 /* obtain default ACL */
1053 acl_size = mds_get_default_acl(dir, &acl);
1056 GOTO(cleanup, rc = -ENOMEM);
1060 * before obd_create() is called, o_fid is not known if
1061 * this is not recovery of cause.
1063 rc = obd_create(mds->mds_md_exp, oa, acl, acl_size,
1067 OBD_FREE(acl, acl_size);
1070 CERROR("can't create remote inode: %d\n", rc);
1071 DEBUG_REQ(D_ERROR, req, "parent "LPU64"/%u name %s mode %o",
1072 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
1073 rec->ur_name, rec->ur_mode);
1078 LASSERT(oa->o_fid != 0);
1080 /* now, add new dir entry for it */
1081 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
1082 if (IS_ERR(handle)) {
1084 GOTO(cleanup, rc = PTR_ERR(handle));
1087 /* creating local dentry for remote inode. */
1088 rc = fsfilt_add_dir_entry(obd, dparent, rec->ur_name,
1089 rec->ur_namelen - 1, oa->o_id,
1090 oa->o_generation, i, oa->o_fid);
1093 CERROR("Can't create local entry %*s for "
1094 "remote inode.\n", rec->ur_namelen - 1,
1100 body->valid |= OBD_MD_FLID | OBD_MD_MDS | OBD_MD_FID;
1102 obdo2id(&body->id1, oa);
1105 /* requested name exists in the directory */
1111 handle = fsfilt_start(obd, dir, FSFILT_OP_SYMLINK, NULL);
1113 GOTO(cleanup, rc = PTR_ERR(handle));
1114 if (rec->ur_tgt == NULL) /* no target supplied */
1115 rc = -EINVAL; /* -EPROTO? */
1117 rc = ll_vfs_symlink(dir, dchild, rec->ur_tgt, S_IALLUGO);
1124 int rdev = rec->ur_rdev;
1125 handle = fsfilt_start(obd, dir, FSFILT_OP_MKNOD, NULL);
1127 GOTO(cleanup, (handle = NULL, rc = PTR_ERR(handle)));
1128 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
1132 CERROR("bad file type %o creating %s\n", type, rec->ur_name);
1133 dchild->d_fsdata = NULL;
1134 GOTO(cleanup, rc = -EINVAL);
1137 /* In case we stored the desired inum in here, we want to clean up. */
1138 if (dchild->d_fsdata == (void *)(unsigned long)id_ino(rec->ur_id2))
1139 dchild->d_fsdata = NULL;
1142 CDEBUG(D_INODE, "error during create: %d\n", rc);
1144 } else if (dchild->d_inode) {
1145 struct mds_export_data *med = &req->rq_export->u.eu_mds_data;
1146 struct inode *inode = dchild->d_inode;
1150 iattr.ia_uid = rec->ur_fsuid;
1151 LTIME_S(iattr.ia_atime) = rec->ur_time;
1152 LTIME_S(iattr.ia_ctime) = rec->ur_time;
1153 LTIME_S(iattr.ia_mtime) = rec->ur_time;
1155 if (dir->i_mode & S_ISGID)
1156 iattr.ia_gid = dir->i_gid;
1158 iattr.ia_gid = rec->ur_fsgid;
1160 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
1161 ATTR_MTIME | ATTR_CTIME;
1163 if (id_ino(rec->ur_id2)) {
1164 LASSERT(id_ino(rec->ur_id2) == inode->i_ino);
1165 inode->i_generation = id_gen(rec->ur_id2);
1166 /* dirtied and committed by the upcoming setattr. */
1167 CDEBUG(D_INODE, "recreated ino %lu with gen %u\n",
1168 inode->i_ino, inode->i_generation);
1170 mds_inode2id(obd, &body->id1, dchild->d_inode, fid);
1171 mds_update_inode_ids(obd, inode, handle, &body->id1, &sid);
1173 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
1175 CERROR("error on child setattr: rc = %d\n", rc);
1177 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
1178 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
1180 CERROR("error on parent setattr: rc = %d\n", rc);
1182 MD_COUNTER_INCREMENT(obd, create);
1184 /* take care of default stripe inheritance */
1185 if (type == S_IFDIR) {
1186 struct lov_mds_md lmm;
1187 int lmm_size = sizeof(lmm), nstripes = 0;
1189 rc = mds_get_md(obd, dir, &lmm, &lmm_size, 1, 0);
1191 down(&inode->i_sem);
1192 rc = fsfilt_set_md(obd, inode, handle,
1193 &lmm, lmm_size, EA_LOV);
1197 CERROR("error on copy stripe info: rc = %d\n",
1203 nstripes = *(u16 *)rec->ur_eadata;
1207 * we pass LCK_EX to split routine to signal,
1208 * that we have exclusive access to the
1209 * directory. Simple because nobody knows it
1210 * already exists -bzzz
1212 rc = mds_try_to_split_dir(obd, dchild,
1216 /* dir got splitted */
1218 } else if (rc < 0) {
1219 /* an error occured during
1227 mds_pack_inode2body(obd, body, inode, 1);
1228 mds_body_do_reverse_map(med, body);
1230 if (rec->ur_flags & MDS_REINT_REQ) {
1231 LASSERT(body != NULL);
1232 rc = mds_fidmap_add(obd, &body->id1);
1234 CERROR("can't create fid->ino mapping, "
1244 err = mds_finish_transno(mds, dir, handle, req, rc, 0);
1246 if (rc && created) {
1247 /* Destroy the file we just created. This should not need extra
1248 * journal credits, as we have already modified all of the
1249 * blocks needed in order to create the file in the first
1253 err = vfs_rmdir(dir, dchild);
1255 CERROR("rmdir in error path: %d\n", err);
1258 err = vfs_unlink(dir, dchild);
1260 CERROR("unlink in error path: %d\n", err);
1263 } else if (created) {
1264 /* The inode we were allocated may have just been freed
1265 * by an unlink operation. We take this lock to
1266 * synchronize against the matching reply-ack-lock taken
1267 * in unlink, to avoid replay problems if this reply
1268 * makes it out to the client but the unlink's does not.
1269 * See bug 2029 for more detail.*/
1270 mds_lock_new_child(obd, dchild->d_inode, NULL);
1274 switch (cleanup_phase) {
1275 case 2: /* child dentry */
1277 case 1: /* locked parent dentry */
1279 if (lockh[1].cookie != 0)
1280 ldlm_lock_decref(lockh + 1, parent_mode);
1283 ldlm_lock_decref(lockh, LCK_PW);
1285 ptlrpc_save_lock(req, lockh, LCK_PW);
1291 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1295 OBD_FREE(mea, mea_size);
1296 req->rq_status = rc;
1301 res_gt(struct ldlm_res_id *res1, struct ldlm_res_id *res2,
1302 ldlm_policy_data_t *p1, ldlm_policy_data_t *p2)
1306 for (i = 0; i < RES_NAME_SIZE; i++) {
1308 * this is needed to make zeroed res_id entries to be put at the
1309 * end of list in *ordered_locks() .
1311 if (res1->name[i] == 0 && res2->name[i] != 0)
1313 if (res2->name[i] == 0 && res1->name[i] != 0)
1315 if (res1->name[i] > res2->name[i])
1317 if (res1->name[i] < res2->name[i])
1324 if (memcmp(p1, p2, sizeof(*p1)) < 0)
1330 /* This function doesn't use ldlm_match_or_enqueue because we're always called
1331 * with EX or PW locks, and the MDS is no longer allowed to match write locks,
1332 * because they take the place of local semaphores.
1334 * One or two locks are taken in numerical order. A res_id->name[0] of 0 means
1335 * no lock is taken for that res_id. Must be at least one non-zero res_id. */
1336 int enqueue_ordered_locks(struct obd_device *obd, struct ldlm_res_id *p1_res_id,
1337 struct lustre_handle *p1_lockh, int p1_lock_mode,
1338 ldlm_policy_data_t *p1_policy,
1339 struct ldlm_res_id *p2_res_id,
1340 struct lustre_handle *p2_lockh, int p2_lock_mode,
1341 ldlm_policy_data_t *p2_policy)
1343 int lock_modes[2] = { p1_lock_mode, p2_lock_mode };
1344 struct ldlm_res_id *res_id[2] = { p1_res_id, p2_res_id };
1345 struct lustre_handle *handles[2] = { p1_lockh, p2_lockh };
1346 ldlm_policy_data_t *policies[2] = { p1_policy, p2_policy };
1350 LASSERT(p1_res_id != NULL && p2_res_id != NULL);
1352 CDEBUG(D_INFO, "locks before: "LPU64"/"LPU64"\n",
1353 res_id[0]->name[0], res_id[1]->name[0]);
1355 if (res_gt(p1_res_id, p2_res_id, p1_policy, p2_policy)) {
1356 handles[1] = p1_lockh;
1357 handles[0] = p2_lockh;
1358 res_id[1] = p1_res_id;
1359 res_id[0] = p2_res_id;
1360 lock_modes[1] = p1_lock_mode;
1361 lock_modes[0] = p2_lock_mode;
1362 policies[1] = p1_policy;
1363 policies[0] = p2_policy;
1366 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"\n",
1367 res_id[0]->name[0], res_id[1]->name[0]);
1369 flags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB;
1370 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, *res_id[0],
1371 LDLM_IBITS, policies[0], lock_modes[0], &flags,
1372 mds_blocking_ast, ldlm_completion_ast, NULL, NULL,
1373 NULL, 0, NULL, handles[0]);
1376 ldlm_lock_dump_handle(D_OTHER, handles[0]);
1378 if (!memcmp(res_id[0], res_id[1], sizeof(*res_id[0])) &&
1379 (policies[0]->l_inodebits.bits & policies[1]->l_inodebits.bits)) {
1380 memcpy(handles[1], handles[0], sizeof(*(handles[1])));
1381 ldlm_lock_addref(handles[1], lock_modes[1]);
1382 } else if (res_id[1]->name[0] != 0) {
1383 flags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB;
1384 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1385 *res_id[1], LDLM_IBITS, policies[1],
1386 lock_modes[1], &flags, mds_blocking_ast,
1387 ldlm_completion_ast, NULL, NULL, NULL, 0,
1389 if (rc != ELDLM_OK) {
1390 ldlm_lock_decref(handles[0], lock_modes[0]);
1393 ldlm_lock_dump_handle(D_OTHER, handles[1]);
1399 int enqueue_4ordered_locks(struct obd_device *obd,struct ldlm_res_id *p1_res_id,
1400 struct lustre_handle *p1_lockh, int p1_lock_mode,
1401 ldlm_policy_data_t *p1_policy,
1402 struct ldlm_res_id *p2_res_id,
1403 struct lustre_handle *p2_lockh, int p2_lock_mode,
1404 ldlm_policy_data_t *p2_policy,
1405 struct ldlm_res_id *c1_res_id,
1406 struct lustre_handle *c1_lockh, int c1_lock_mode,
1407 ldlm_policy_data_t *c1_policy,
1408 struct ldlm_res_id *c2_res_id,
1409 struct lustre_handle *c2_lockh, int c2_lock_mode,
1410 ldlm_policy_data_t *c2_policy)
1412 struct ldlm_res_id *res_id[5] = { p1_res_id, p2_res_id,
1413 c1_res_id, c2_res_id };
1414 struct lustre_handle *dlm_handles[5] = { p1_lockh, p2_lockh,
1415 c1_lockh, c2_lockh };
1416 int lock_modes[5] = { p1_lock_mode, p2_lock_mode,
1417 c1_lock_mode, c2_lock_mode };
1418 ldlm_policy_data_t *policies[5] = { p1_policy, p2_policy,
1419 c1_policy, c2_policy};
1420 int rc, i, j, sorted, flags;
1423 CDEBUG(D_DLMTRACE, "locks before: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1424 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1425 res_id[3]->name[0]);
1428 * simple insertion sort - we have at most 4 elements. Note, that zeroed
1429 * res_id should be at the end of list after sorting is finished.
1431 for (i = 1; i < 4; i++) {
1433 dlm_handles[4] = dlm_handles[i];
1434 res_id[4] = res_id[i];
1435 lock_modes[4] = lock_modes[i];
1436 policies[4] = policies[i];
1440 if (res_gt(res_id[j], res_id[4], policies[j],
1442 dlm_handles[j + 1] = dlm_handles[j];
1443 res_id[j + 1] = res_id[j];
1444 lock_modes[j + 1] = lock_modes[j];
1445 policies[j + 1] = policies[j];
1450 } while (j >= 0 && !sorted);
1452 dlm_handles[j + 1] = dlm_handles[4];
1453 res_id[j + 1] = res_id[4];
1454 lock_modes[j + 1] = lock_modes[4];
1455 policies[j + 1] = policies[4];
1458 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1459 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1460 res_id[3]->name[0]);
1462 /* XXX we could send ASTs on all these locks first before blocking? */
1463 for (i = 0; i < 4; i++) {
1464 flags = LDLM_FL_ATOMIC_CB;
1467 * nevertheless zeroed res_ids should be at the end of list, and
1468 * could use break here, I think, that it is more correctly for
1469 * clear understanding of code to have continue here, as it
1470 * clearly means, that zeroed res_id should be skipped and does
1471 * not mean, that if we meet zeroed res_id we should stop
1474 if (res_id[i]->name[0] == 0)
1478 !memcmp(res_id[i], res_id[i-1], sizeof(*res_id[i])) &&
1479 (policies[i]->l_inodebits.bits &
1480 policies[i-1]->l_inodebits.bits) ) {
1481 memcpy(dlm_handles[i], dlm_handles[i-1],
1482 sizeof(*(dlm_handles[i])));
1483 ldlm_lock_addref(dlm_handles[i], lock_modes[i]);
1485 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1486 *res_id[i], LDLM_IBITS,
1488 lock_modes[i], &flags,
1490 ldlm_completion_ast, NULL, NULL,
1491 NULL, 0, NULL, dlm_handles[i]);
1493 GOTO(out_err, rc = -EIO);
1494 ldlm_lock_dump_handle(D_OTHER, dlm_handles[i]);
1501 ldlm_lock_decref(dlm_handles[i], lock_modes[i]);
1506 /* In the unlikely case that the child changed while we were waiting
1507 * on the lock, we need to drop the lock on the old child and either:
1508 * - if the child has a lower resource name, then we have to also
1509 * drop the parent lock and regain the locks in the right order
1510 * - in the rename case, if the child has a lower resource name than one of
1511 * the other parent/child resources (maxres) we also need to reget the locks
1512 * - if the child has a higher resource name (this is the common case)
1513 * we can just get the lock on the new child (still in lock order)
1515 * Returns 0 if the child did not change or if it changed but could be locked.
1516 * Returns 1 if the child changed and we need to re-lock (no locks held).
1517 * Returns -ve error with a valid dchild (no locks held). */
1518 static int mds_verify_child(struct obd_device *obd,
1519 struct ldlm_res_id *parent_res_id,
1520 struct lustre_handle *parent_lockh,
1521 struct dentry *dparent, int parent_mode,
1522 struct ldlm_res_id *child_res_id,
1523 struct lustre_handle *child_lockh,
1524 struct dentry **dchildp, int child_mode,
1525 ldlm_policy_data_t *child_policy,
1526 const char *name, int namelen,
1527 struct ldlm_res_id *maxres,
1528 unsigned long child_ino, __u32 child_gen)
1530 struct lustre_id sid;
1531 struct dentry *vchild, *dchild = *dchildp;
1532 int rc = 0, cleanup_phase = 2; /* parent, child locks */
1535 vchild = ll_lookup_one_len(name, dparent, namelen - 1);
1537 GOTO(cleanup, rc = PTR_ERR(vchild));
1539 if ((vchild->d_flags & DCACHE_CROSS_REF)) {
1540 if (child_gen == vchild->d_generation &&
1541 child_ino == vchild->d_inum) {
1550 if (likely((vchild->d_inode == NULL && child_res_id->name[0] == 0) ||
1551 (vchild->d_inode != NULL &&
1552 child_gen == vchild->d_inode->i_generation &&
1553 child_ino == vchild->d_inode->i_ino))) {
1561 CDEBUG(D_DLMTRACE, "child inode changed: %p != %p (%lu != "LPU64")\n",
1562 vchild->d_inode, dchild ? dchild->d_inode : 0,
1563 vchild->d_inode ? vchild->d_inode->i_ino : 0,
1564 child_res_id->name[0]);
1566 if (child_res_id->name[0] != 0)
1567 ldlm_lock_decref(child_lockh, child_mode);
1571 cleanup_phase = 1; /* parent lock only */
1572 *dchildp = dchild = vchild;
1574 if (dchild->d_inode || (dchild->d_flags & DCACHE_CROSS_REF)) {
1575 int flags = LDLM_FL_ATOMIC_CB;
1577 if (dchild->d_inode) {
1578 down(&dchild->d_inode->i_sem);
1579 rc = mds_read_inode_sid(obd, dchild->d_inode, &sid);
1580 up(&dchild->d_inode->i_sem);
1582 CERROR("Can't read inode self id, inode %lu,"
1583 " rc %d\n", dchild->d_inode->i_ino, rc);
1586 child_res_id->name[0] = id_fid(&sid);
1587 child_res_id->name[1] = id_group(&sid);
1589 child_res_id->name[0] = dchild->d_fid;
1590 child_res_id->name[1] = dchild->d_mdsnum;
1593 if (res_gt(parent_res_id, child_res_id, NULL, NULL) ||
1594 res_gt(maxres, child_res_id, NULL, NULL)) {
1595 CDEBUG(D_DLMTRACE, "relock "LPU64"<("LPU64"|"LPU64")\n",
1596 child_res_id->name[0], parent_res_id->name[0],
1598 GOTO(cleanup, rc = 1);
1601 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1602 *child_res_id, LDLM_IBITS, child_policy,
1603 child_mode, &flags, mds_blocking_ast,
1604 ldlm_completion_ast, NULL, NULL, NULL, 0,
1607 GOTO(cleanup, rc = -EIO);
1610 memset(child_res_id, 0, sizeof(*child_res_id));
1616 switch(cleanup_phase) {
1618 if (child_res_id->name[0] != 0)
1619 ldlm_lock_decref(child_lockh, child_mode);
1621 ldlm_lock_decref(parent_lockh, parent_mode);
1627 int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds,
1628 struct lustre_id *id,
1629 struct lustre_handle *parent_lockh,
1630 struct dentry **dparentp, int parent_mode,
1631 __u64 parent_lockpart, int *update_mode,
1632 char *name, int namelen,
1633 struct lustre_handle *child_lockh,
1634 struct dentry **dchildp, int child_mode,
1635 __u64 child_lockpart)
1637 ldlm_policy_data_t parent_policy = {.l_inodebits = { parent_lockpart }};
1638 ldlm_policy_data_t child_policy = {.l_inodebits = { child_lockpart }};
1639 struct ldlm_res_id parent_res_id = { .name = {0} };
1640 struct ldlm_res_id child_res_id = { .name = {0} };
1641 unsigned long child_ino = 0; __u32 child_gen = 0;
1642 int rc = 0, cleanup_phase = 0;
1643 struct lustre_id sid;
1644 struct inode *inode;
1647 /* Step 1: Lookup parent */
1648 *dparentp = mds_id2dentry(obd, id, NULL);
1649 if (IS_ERR(*dparentp)) {
1650 rc = PTR_ERR(*dparentp);
1655 CDEBUG(D_INODE, "parent ino %lu, name %s\n",
1656 (*dparentp)->d_inode->i_ino, name);
1658 parent_res_id.name[0] = id_fid(id);
1659 parent_res_id.name[1] = id_group(id);
1662 parent_lockh[1].cookie = 0;
1663 if (name && IS_PDIROPS((*dparentp)->d_inode)) {
1664 struct ldlm_res_id res_id = { .name = {0} };
1665 ldlm_policy_data_t policy;
1666 int flags = LDLM_FL_ATOMIC_CB;
1668 *update_mode = mds_lock_mode_for_dir(obd, *dparentp, parent_mode);
1670 res_id.name[0] = id_fid(id);
1671 res_id.name[1] = id_group(id);
1672 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1674 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1675 res_id, LDLM_IBITS, &policy,
1676 *update_mode, &flags,
1678 ldlm_completion_ast,
1679 NULL, NULL, NULL, 0, NULL,
1685 parent_res_id.name[2] = full_name_hash((unsigned char *)name,
1688 CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n",
1689 (unsigned long)id_fid(id), (unsigned long)id_group(id),
1690 parent_res_id.name[2]);
1694 cleanup_phase = 1; /* parent dentry */
1696 /* Step 2: Lookup child (without DLM lock, to get resource name) */
1697 *dchildp = ll_lookup_one_len(name, *dparentp, namelen - 1);
1698 if (IS_ERR(*dchildp)) {
1699 rc = PTR_ERR(*dchildp);
1700 CDEBUG(D_INODE, "child lookup error %d\n", rc);
1704 if ((*dchildp)->d_flags & DCACHE_CROSS_REF) {
1706 * inode lives on another MDS: return * fid/mdsnum and LOOKUP
1707 * lock. Drop possible UPDATE lock!
1709 child_policy.l_inodebits.bits &= ~MDS_INODELOCK_UPDATE;
1710 child_policy.l_inodebits.bits |= MDS_INODELOCK_LOOKUP;
1712 child_res_id.name[0] = (*dchildp)->d_fid;
1713 child_res_id.name[1] = (*dchildp)->d_mdsnum;
1714 child_ino = (*dchildp)->d_inum;
1715 child_gen = (*dchildp)->d_generation;
1719 inode = (*dchildp)->d_inode;
1721 inode = igrab(inode);
1725 down(&inode->i_sem);
1726 rc = mds_read_inode_sid(obd, inode, &sid);
1729 CERROR("Can't read inode self id, inode %lu, "
1730 "rc %d\n", inode->i_ino, rc);
1735 child_ino = inode->i_ino;
1736 child_gen = inode->i_generation;
1737 child_res_id.name[0] = id_fid(&sid);
1738 child_res_id.name[1] = id_group(&sid);
1742 cleanup_phase = 2; /* child dentry */
1744 /* Step 3: Lock parent and child in resource order. If child doesn't
1745 * exist, we still have to lock the parent and re-lookup. */
1746 rc = enqueue_ordered_locks(obd, &parent_res_id, parent_lockh, parent_mode,
1747 &parent_policy, &child_res_id, child_lockh,
1748 child_mode, &child_policy);
1752 if ((*dchildp)->d_inode || ((*dchildp)->d_flags & DCACHE_CROSS_REF))
1753 cleanup_phase = 4; /* child lock */
1755 cleanup_phase = 3; /* parent lock */
1757 /* Step 4: Re-lookup child to verify it hasn't changed since locking */
1758 rc = mds_verify_child(obd, &parent_res_id, parent_lockh, *dparentp,
1759 parent_mode, &child_res_id, child_lockh,
1760 dchildp, child_mode, &child_policy,
1761 name, namelen, &parent_res_id, child_ino,
1773 switch (cleanup_phase) {
1775 ldlm_lock_decref(child_lockh, child_mode);
1777 ldlm_lock_decref(parent_lockh, parent_mode);
1782 if (parent_lockh[1].cookie)
1783 ldlm_lock_decref(parent_lockh + 1, *update_mode);
1791 void mds_reconstruct_generic(struct ptlrpc_request *req)
1793 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1794 mds_req_from_mcd(req, med->med_mcd);
1797 /* If we are unlinking an open file/dir (i.e. creating an orphan) then we
1798 * instead link the inode into the PENDING directory until it is finally
1799 * released. We can't simply call mds_reint_rename() or some part thereof,
1800 * because we don't have the inode to check for link count/open status until
1801 * after it is locked.
1803 * For lock ordering, caller must get child->i_sem first, then pending->i_sem
1804 * before starting journal transaction.
1806 * returns 1 on success
1807 * returns 0 if we lost a race and didn't make a new link
1808 * returns negative on error
1810 static int mds_orphan_add_link(struct mds_update_record *rec,
1811 struct obd_device *obd, struct dentry *dentry)
1813 struct mds_obd *mds = &obd->u.mds;
1814 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1815 struct inode *inode = dentry->d_inode;
1816 struct dentry *pending_child;
1817 char idname[LL_ID_NAMELEN];
1818 int idlen = 0, rc, mode;
1821 LASSERT(inode != NULL);
1822 LASSERT(!mds_inode_is_orphan(inode));
1823 #ifndef HAVE_I_ALLOC_SEM
1824 LASSERT(down_trylock(&inode->i_sem) != 0);
1826 LASSERT(down_trylock(&pending_dir->i_sem) != 0);
1828 idlen = ll_id2str(idname, inode->i_ino, inode->i_generation);
1830 CDEBUG(D_INODE, "pending destroy of %dx open %d linked %s %s = %s\n",
1831 mds_orphan_open_count(inode), inode->i_nlink,
1832 S_ISDIR(inode->i_mode) ? "dir" :
1833 S_ISREG(inode->i_mode) ? "file" : "other",
1834 rec->ur_name, idname);
1836 if (mds_orphan_open_count(inode) == 0 || inode->i_nlink != 0)
1839 pending_child = lookup_one_len(idname, mds->mds_pending_dir, idlen);
1840 if (IS_ERR(pending_child))
1841 RETURN(PTR_ERR(pending_child));
1843 if (pending_child->d_inode != NULL) {
1844 CERROR("re-destroying orphan file %s?\n", rec->ur_name);
1845 LASSERT(pending_child->d_inode == inode);
1846 GOTO(out_dput, rc = 0);
1850 * link() is semanticaly-wrong for S_IFDIR, so we set S_IFREG for
1851 * linking and return real mode back then -bzzz
1853 mode = inode->i_mode;
1854 inode->i_mode = S_IFREG;
1855 rc = vfs_link(dentry, pending_dir, pending_child);
1857 CERROR("error linking orphan %s to PENDING: rc = %d\n",
1860 mds_inode_set_orphan(inode);
1862 /* return mode and correct i_nlink if inode is directory */
1863 inode->i_mode = mode;
1864 LASSERTF(inode->i_nlink == 1, "%s nlink == %d\n",
1865 S_ISDIR(mode) ? "dir" : S_ISREG(mode) ? "file" : "other",
1867 if (S_ISDIR(mode)) {
1869 i_nlink_inc(pending_dir);
1870 mark_inode_dirty(inode);
1871 mark_inode_dirty(pending_dir);
1874 GOTO(out_dput, rc = 1);
1876 l_dput(pending_child);
1880 int mds_create_local_dentry(struct mds_update_record *rec,
1881 struct obd_device *obd)
1883 struct mds_obd *mds = &obd->u.mds;
1884 struct inode *id_dir = mds->mds_id_dir->d_inode;
1885 int idlen = 0, rc, cleanup_phase = 0;
1886 struct dentry *new_child = NULL;
1887 char *idname = rec->ur_name;
1888 struct dentry *child = NULL;
1889 struct lustre_handle lockh[2] = {{0}, {0}};
1890 struct lustre_id sid;
1894 down(&id_dir->i_sem);
1895 idlen = ll_id2str(idname, id_ino(rec->ur_id1),
1896 id_gen(rec->ur_id1));
1898 CDEBUG(D_OTHER, "look for local dentry '%s' for "DLID4"\n",
1899 idname, OLID4(rec->ur_id1));
1901 new_child = ll_lookup_one_len(idname, mds->mds_id_dir,
1904 if (IS_ERR(new_child)) {
1905 CERROR("can't lookup %s: %d\n", idname,
1906 (int) PTR_ERR(new_child));
1907 GOTO(cleanup, rc = PTR_ERR(new_child));
1911 down(&id_dir->i_sem);
1912 rc = mds_read_inode_sid(obd, id_dir, &sid);
1915 CERROR("Can't read inode self id, inode %lu, "
1916 "rc %d\n", id_dir->i_ino, rc);
1920 if (new_child->d_inode != NULL) {
1921 /* nice. we've already have local dentry! */
1922 CDEBUG(D_OTHER, "found dentry in FIDS/: %u/%u\n",
1923 (unsigned)new_child->d_inode->i_ino,
1924 (unsigned)new_child->d_inode->i_generation);
1926 id_ino(rec->ur_id1) = id_dir->i_ino;
1927 id_gen(rec->ur_id1) = id_dir->i_generation;
1928 rec->ur_namelen = idlen + 1;
1930 id_fid(rec->ur_id1) = id_fid(&sid);
1931 id_group(rec->ur_id1) = id_group(&sid);
1933 GOTO(cleanup, rc = 0);
1936 /* new, local dentry will be added soon. we need no aliases here */
1939 if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
1940 child = mds_id2dentry(obd, rec->ur_id1, NULL);
1942 child = mds_id2locked_dentry(obd, rec->ur_id1, NULL,
1943 LCK_EX, lockh, NULL, NULL, 0,
1944 MDS_INODELOCK_UPDATE);
1947 if (IS_ERR(child)) {
1948 rc = PTR_ERR(child);
1949 if (rc != -ENOENT || !(rec->ur_mode & MDS_MODE_REPLAY))
1950 CERROR("can't get victim: %d\n", rc);
1955 handle = fsfilt_start(obd, id_dir, FSFILT_OP_LINK, NULL);
1957 GOTO(cleanup, rc = PTR_ERR(handle));
1959 rc = fsfilt_add_dir_entry(obd, mds->mds_id_dir, idname,
1960 idlen, id_ino(rec->ur_id1),
1961 id_gen(rec->ur_id1), mds->mds_num,
1962 id_fid(rec->ur_id1));
1964 CERROR("error linking orphan %lu/%lu to FIDS: rc = %d\n",
1965 (unsigned long)child->d_inode->i_ino,
1966 (unsigned long)child->d_inode->i_generation, rc);
1968 if (S_ISDIR(child->d_inode->i_mode)) {
1969 i_nlink_inc(id_dir);
1970 mark_inode_dirty(id_dir);
1972 mark_inode_dirty(child->d_inode);
1974 fsfilt_commit(obd, mds->mds_sb, id_dir, handle, 0);
1976 id_ino(rec->ur_id1) = id_dir->i_ino;
1977 id_gen(rec->ur_id1) = id_dir->i_generation;
1978 rec->ur_namelen = idlen + 1;
1980 id_fid(rec->ur_id1) = id_fid(&sid);
1981 id_group(rec->ur_id1) = id_group(&sid);
1985 switch(cleanup_phase) {
1987 if (!(rec->ur_mode & MDS_MODE_DONT_LOCK))
1988 ldlm_lock_decref(lockh, LCK_EX);
1998 static int mds_copy_unlink_reply(struct ptlrpc_request *master,
1999 struct ptlrpc_request *slave)
2001 void *cookie, *cookie2;
2002 struct mds_body *body2;
2003 struct mds_body *body;
2007 body = lustre_msg_buf(slave->rq_repmsg, 0, sizeof(*body));
2008 LASSERT(body != NULL);
2010 body2 = lustre_msg_buf(master->rq_repmsg, 0, sizeof (*body));
2011 LASSERT(body2 != NULL);
2013 if (!(body->valid & (OBD_MD_FLID | OBD_MD_FLGENER)))
2016 memcpy(body2, body, sizeof(*body));
2017 body2->valid &= ~OBD_MD_FLCOOKIE;
2019 if (!(body->valid & OBD_MD_FLEASIZE) &&
2020 !(body->valid & OBD_MD_FLDIREA))
2023 if (body->eadatasize == 0) {
2024 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
2028 LASSERT(master->rq_repmsg->buflens[1] >= body->eadatasize);
2030 ea = lustre_msg_buf(slave->rq_repmsg, 1, body->eadatasize);
2031 LASSERT(ea != NULL);
2033 ea2 = lustre_msg_buf(master->rq_repmsg, 1, body->eadatasize);
2034 LASSERT(ea2 != NULL);
2036 memcpy(ea2, ea, body->eadatasize);
2038 if (body->valid & OBD_MD_FLCOOKIE) {
2039 LASSERT(master->rq_repmsg->buflens[2] >=
2040 slave->rq_repmsg->buflens[2]);
2041 cookie = lustre_msg_buf(slave->rq_repmsg, 2,
2042 slave->rq_repmsg->buflens[2]);
2043 LASSERT(cookie != NULL);
2045 cookie2 = lustre_msg_buf(master->rq_repmsg, 2,
2046 master->rq_repmsg->buflens[2]);
2047 LASSERT(cookie2 != NULL);
2048 memcpy(cookie2, cookie, slave->rq_repmsg->buflens[2]);
2049 body2->valid |= OBD_MD_FLCOOKIE;
2054 static int mds_reint_unlink_remote(struct mds_update_record *rec,
2055 int offset, struct ptlrpc_request *req,
2056 struct lustre_handle *parent_lockh,
2057 int update_mode, struct dentry *dparent,
2058 struct lustre_handle *child_lockh,
2059 struct dentry *dchild)
2061 struct obd_device *obd = req->rq_export->exp_obd;
2062 struct mds_obd *mds = mds_req2mds(req);
2063 struct ptlrpc_request *request = NULL;
2064 int rc = 0, cleanup_phase = 0;
2065 struct mdc_op_data *op_data;
2069 LASSERT(offset == 1 || offset == 3);
2071 /* time to drop i_nlink on remote MDS */
2072 OBD_ALLOC(op_data, sizeof(*op_data));
2073 if (op_data == NULL)
2076 memset(op_data, 0, sizeof(*op_data));
2077 mds_pack_dentry2id(obd, &op_data->id1, dchild, 1);
2078 op_data->create_mode = rec->ur_mode;
2080 DEBUG_REQ(D_INODE, req, "unlink %*s (remote inode "DLID4")",
2081 rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data->id1));
2083 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
2084 DEBUG_REQ(D_HA, req, "unlink %*s (remote inode "DLID4")",
2085 rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data->id1));
2088 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
2089 op_data->create_mode |= MDS_MODE_REPLAY;
2091 rc = md_unlink(mds->mds_md_exp, op_data, &request);
2092 OBD_FREE(op_data, sizeof(*op_data));
2097 mds_copy_unlink_reply(req, request);
2098 ptlrpc_req_finished(request);
2102 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
2105 GOTO(cleanup, rc = PTR_ERR(handle));
2106 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, dchild);
2107 rc = mds_finish_transno(mds, dparent->d_inode, handle, req,
2112 req->rq_status = rc;
2115 if (parent_lockh[1].cookie != 0)
2116 ldlm_lock_decref(parent_lockh + 1, update_mode);
2118 ldlm_lock_decref(child_lockh, LCK_EX);
2120 ldlm_lock_decref(parent_lockh, LCK_PW);
2122 ptlrpc_save_lock(req, parent_lockh, LCK_PW);
2129 static int mds_reint_unlink(struct mds_update_record *rec, int offset,
2130 struct ptlrpc_request *req, struct lustre_handle *lh)
2132 struct dentry *dparent = NULL, *dchild;
2133 struct mds_obd *mds = mds_req2mds(req);
2134 struct obd_device *obd = req->rq_export->exp_obd;
2135 struct mds_body *body = NULL;
2136 struct inode *child_inode = NULL;
2137 struct lustre_handle parent_lockh[2] = {{0}, {0}};
2138 struct lustre_handle child_lockh = {0};
2139 struct lustre_handle child_reuse_lockh = {0};
2140 struct lustre_handle *slave_lockh = NULL;
2141 char idname[LL_ID_NAMELEN];
2142 struct llog_create_locks *lcl = NULL;
2143 void *handle = NULL;
2144 int rc = 0, cleanup_phase = 0;
2145 int unlink_by_id = 0;
2149 LASSERT(offset == 1 || offset == 3);
2151 DEBUG_REQ(D_INODE, req, "parent ino "LPU64"/%u, child %s",
2152 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
2155 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
2157 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
2158 DEBUG_REQ(D_HA, req, "unlink replay");
2159 LASSERT(offset == 1); /* should not come from intent */
2160 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
2161 lustre_msg_buf(req->rq_reqmsg, offset + 2, 0),
2162 req->rq_repmsg->buflens[2]);
2165 MD_COUNTER_INCREMENT(obd, unlink);
2167 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
2168 GOTO(cleanup, rc = -ENOENT);
2170 if (rec->ur_namelen == 1) {
2171 /* this is request to drop i_nlink on local inode */
2173 rec->ur_name = idname;
2174 rc = mds_create_local_dentry(rec, obd);
2175 if (rc == -ENOENT || (rec->ur_mode & MDS_MODE_REPLAY)) {
2176 DEBUG_REQ(D_HA, req,
2177 "drop nlink on inode "DLID4" (replay)",
2178 OLID4(rec->ur_id1));
2184 if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
2185 /* master mds for directory asks slave removing inode is already
2187 dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL,
2188 LCK_PW, parent_lockh,
2189 &update_mode, rec->ur_name,
2191 MDS_INODELOCK_UPDATE);
2192 if (IS_ERR(dparent))
2193 GOTO(cleanup, rc = PTR_ERR(dparent));
2194 dchild = ll_lookup_one_len(rec->ur_name, dparent,
2195 rec->ur_namelen - 1);
2197 GOTO(cleanup, rc = PTR_ERR(dchild));
2198 child_lockh.cookie = 0;
2199 LASSERT(!(dchild->d_flags & DCACHE_CROSS_REF));
2200 LASSERT(dchild->d_inode != NULL);
2201 LASSERT(S_ISDIR(dchild->d_inode->i_mode));
2203 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1,
2204 parent_lockh, &dparent,
2205 LCK_PW, MDS_INODELOCK_UPDATE,
2206 &update_mode, rec->ur_name,
2207 rec->ur_namelen, &child_lockh,
2209 (MDS_INODELOCK_LOOKUP |
2210 MDS_INODELOCK_UPDATE));
2215 if (dchild->d_flags & DCACHE_CROSS_REF) {
2216 /* we should have parent lock only here */
2217 LASSERT(unlink_by_id == 0);
2218 LASSERT(dchild->d_mdsnum != mds->mds_num);
2219 mds_reint_unlink_remote(rec, offset, req, parent_lockh,
2220 update_mode, dparent, &child_lockh, dchild);
2224 cleanup_phase = 1; /* dchild, dparent, locks */
2227 child_inode = dchild->d_inode;
2228 if (child_inode == NULL) {
2229 CDEBUG(D_INODE, "child doesn't exist (dir %lu, name %s)\n",
2230 dparent ? dparent->d_inode->i_ino : 0, rec->ur_name);
2231 GOTO(cleanup, rc = -ENOENT);
2234 cleanup_phase = 2; /* dchild has a lock */
2236 /* We have to do these checks ourselves, in case we are making an
2237 * orphan. The client tells us whether rmdir() or unlink() was called,
2238 * so we need to return appropriate errors (bug 72).
2240 * We don't have to check permissions, because vfs_rename (called from
2241 * mds_open_unlink_rename) also calls may_delete. */
2242 if ((rec->ur_mode & S_IFMT) == S_IFDIR) {
2243 if (!S_ISDIR(child_inode->i_mode))
2244 GOTO(cleanup, rc = -ENOTDIR);
2246 if (S_ISDIR(child_inode->i_mode))
2247 GOTO(cleanup, rc = -EISDIR);
2250 /* handle splitted dir */
2251 rc = mds_lock_slave_objs(obd, dchild, &slave_lockh);
2255 /* Step 4: Get a lock on the ino to sync with creation WRT inode
2256 * reuse (see bug 2029). */
2257 rc = mds_lock_new_child(obd, child_inode, &child_reuse_lockh);
2260 cleanup_phase = 3; /* child inum lock */
2262 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dparent->d_inode->i_sb);
2264 /* ldlm_reply in buf[0] if called via intent */
2270 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
2271 LASSERT(body != NULL);
2273 /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
2274 DOWN_READ_I_ALLOC_SEM(child_inode);
2275 cleanup_phase = 4; /* up(&child_inode->i_sem) when finished */
2277 /* If this is potentially the last reference to this inode, get the
2278 * OBD EA data first so the client can destroy OST objects. We
2279 * only do the object removal later if no open files/links remain. */
2280 if ((S_ISDIR(child_inode->i_mode) && child_inode->i_nlink == 2) ||
2281 child_inode->i_nlink == 1) {
2282 if (mds_orphan_open_count(child_inode) > 0) {
2283 /* need to lock pending_dir before transaction */
2284 down(&mds->mds_pending_dir->d_inode->i_sem);
2285 cleanup_phase = 5; /* up(&pending_dir->i_sem) */
2286 } else if (S_ISREG(child_inode->i_mode)) {
2287 mds_pack_inode2body(obd, body, child_inode, 0);
2288 mds_pack_md(obd, req->rq_repmsg, offset + 1,
2289 body, child_inode, MDS_PACK_MD_LOCK, 0);
2293 /* Step 4: Do the unlink: we already verified ur_mode above (bug 72) */
2294 switch (child_inode->i_mode & S_IFMT) {
2296 /* Drop any lingering child directories before we start our
2297 * transaction, to avoid doing multiple inode dirty/delete
2298 * in our compound transaction (bug 1321). */
2299 shrink_dcache_parent(dchild);
2300 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
2303 GOTO(cleanup, rc = PTR_ERR(handle));
2304 rc = vfs_rmdir(dparent->d_inode, dchild);
2307 #warning "optimization is possible here: we could drop nlink w/o removing local dentry in FIDS/"
2308 struct lov_mds_md *lmm = lustre_msg_buf(req->rq_repmsg,
2310 handle = fsfilt_start_log(obd, dparent->d_inode,
2311 FSFILT_OP_UNLINK, NULL,
2312 le32_to_cpu(lmm->lmm_stripe_count));
2314 GOTO(cleanup, rc = PTR_ERR(handle));
2315 rc = vfs_unlink(dparent->d_inode, dchild);
2323 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK,
2326 GOTO(cleanup, rc = PTR_ERR(handle));
2327 rc = vfs_unlink(dparent->d_inode, dchild);
2330 CERROR("bad file type %o unlinking %s\n", rec->ur_mode,
2333 GOTO(cleanup, rc = -EINVAL);
2336 if (rc == 0 && child_inode->i_nlink == 0) {
2337 if (mds_orphan_open_count(child_inode) > 0)
2338 rc = mds_orphan_add_link(rec, obd, dchild);
2341 GOTO(cleanup, rc = 0);
2343 if (!S_ISREG(child_inode->i_mode))
2346 if (!(body->valid & OBD_MD_FLEASIZE)) {
2347 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
2348 OBD_MD_FLATIME | OBD_MD_FLMTIME);
2349 } else if (mds_log_op_unlink(obd, child_inode,
2350 lustre_msg_buf(req->rq_repmsg, offset + 1, 0),
2351 req->rq_repmsg->buflens[offset + 1],
2352 lustre_msg_buf(req->rq_repmsg, offset + 2, 0),
2353 req->rq_repmsg->buflens[offset + 2],
2355 body->valid |= OBD_MD_FLCOOKIE;
2358 rc = mds_destroy_object(obd, child_inode, 1);
2360 CERROR("can't remove OST object, err %d\n",
2364 if (child_inode->i_nlink == 0)
2365 mds_fidmap_del(obd, &body->id1);
2375 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
2376 LTIME_S(iattr.ia_mtime) = rec->ur_time;
2377 LTIME_S(iattr.ia_ctime) = rec->ur_time;
2379 err = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
2381 CERROR("error on parent setattr: rc = %d\n", err);
2383 rc = mds_finish_transno(mds, dparent ? dparent->d_inode : NULL,
2384 handle, req, rc, 0);
2386 (void)obd_set_info(mds->mds_dt_exp, strlen("unlinked"),
2387 "unlinked", 0, NULL);
2388 switch(cleanup_phase) {
2389 case 5: /* pending_dir semaphore */
2390 up(&mds->mds_pending_dir->d_inode->i_sem);
2391 case 4: /* child inode semaphore */
2392 UP_READ_I_ALLOC_SEM(child_inode);
2393 /* handle splitted dir */
2395 /* master directory can be non-empty or something else ... */
2396 mds_unlink_slave_objs(obd, dchild);
2399 ptlrpc_save_llog_lock(req, lcl);
2400 case 3: /* child ino-reuse lock */
2401 if (rc && body != NULL) {
2402 // Don't unlink the OST objects if the MDS unlink failed
2406 ldlm_lock_decref(&child_reuse_lockh, LCK_EX);
2408 ptlrpc_save_lock(req, &child_reuse_lockh, LCK_EX);
2409 case 2: /* child lock */
2410 mds_unlock_slave_objs(obd, dchild, slave_lockh);
2411 if (child_lockh.cookie)
2412 ldlm_lock_decref(&child_lockh, LCK_EX);
2413 case 1: /* child and parent dentry, parent lock */
2415 if (parent_lockh[1].cookie != 0)
2416 ldlm_lock_decref(parent_lockh + 1, update_mode);
2419 ldlm_lock_decref(parent_lockh, LCK_PW);
2421 ptlrpc_save_lock(req, parent_lockh, LCK_PW);
2428 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2431 req->rq_status = rc;
2436 * to service requests from remote MDS to increment i_nlink
2438 static int mds_reint_link_acquire(struct mds_update_record *rec,
2439 int offset, struct ptlrpc_request *req,
2440 struct lustre_handle *lh)
2442 struct obd_device *obd = req->rq_export->exp_obd;
2443 struct ldlm_res_id src_res_id = { .name = {0} };
2444 struct lustre_handle *handle = NULL, src_lockh = {0};
2445 struct mds_obd *mds = mds_req2mds(req);
2446 int rc = 0, cleanup_phase = 0;
2447 struct dentry *de_src = NULL;
2448 ldlm_policy_data_t policy;
2449 int flags = LDLM_FL_ATOMIC_CB;
2452 DEBUG_REQ(D_INODE, req, "%s: request to acquire i_nlinks "DLID4"\n",
2453 obd->obd_name, OLID4(rec->ur_id1));
2455 /* Step 1: Lookup the source inode and target directory by ID */
2456 de_src = mds_id2dentry(obd, rec->ur_id1, NULL);
2458 GOTO(cleanup, rc = PTR_ERR(de_src));
2459 cleanup_phase = 1; /* source dentry */
2461 src_res_id.name[0] = id_fid(rec->ur_id1);
2462 src_res_id.name[1] = id_group(rec->ur_id1);
2463 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
2465 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
2466 src_res_id, LDLM_IBITS, &policy,
2467 LCK_EX, &flags, mds_blocking_ast,
2468 ldlm_completion_ast, NULL, NULL,
2469 NULL, 0, NULL, &src_lockh);
2471 GOTO(cleanup, rc = -ENOLCK);
2472 cleanup_phase = 2; /* lock */
2474 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
2476 handle = fsfilt_start(obd, de_src->d_inode, FSFILT_OP_LINK, NULL);
2477 if (IS_ERR(handle)) {
2478 rc = PTR_ERR(handle);
2481 i_nlink_inc(de_src->d_inode);
2482 mark_inode_dirty(de_src->d_inode);
2486 rc = mds_finish_transno(mds, de_src ? de_src->d_inode : NULL,
2487 handle, req, rc, 0);
2488 switch (cleanup_phase) {
2491 ldlm_lock_decref(&src_lockh, LCK_EX);
2493 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
2499 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2502 req->rq_status = rc;
2507 * request to link to foreign inode:
2508 * - acquire i_nlinks on this inode
2511 static int mds_reint_link_to_remote(struct mds_update_record *rec,
2512 int offset, struct ptlrpc_request *req,
2513 struct lustre_handle *lh)
2515 struct lustre_handle *handle = NULL, tgt_dir_lockh[2] = {{0}, {0}};
2516 struct obd_device *obd = req->rq_export->exp_obd;
2517 struct dentry *de_tgt_dir = NULL;
2518 struct mds_obd *mds = mds_req2mds(req);
2519 int rc = 0, cleanup_phase = 0;
2520 struct mdc_op_data *op_data;
2521 struct ptlrpc_request *request = NULL;
2525 DEBUG_REQ(D_INODE, req, "%s: request to link "DLID4
2526 ":%*s to foreign inode "DLID4"\n", obd->obd_name,
2527 OLID4(rec->ur_id2), rec->ur_namelen - 1, rec->ur_name,
2528 OLID4(rec->ur_id1));
2530 de_tgt_dir = mds_id2locked_dentry(obd, rec->ur_id2, NULL, LCK_EX,
2531 tgt_dir_lockh, &update_mode,
2532 rec->ur_name, rec->ur_namelen - 1,
2533 MDS_INODELOCK_UPDATE);
2534 if (IS_ERR(de_tgt_dir))
2535 GOTO(cleanup, rc = PTR_ERR(de_tgt_dir));
2538 OBD_ALLOC(op_data, sizeof(*op_data));
2539 if (op_data == NULL)
2540 GOTO(cleanup, rc = -ENOMEM);
2542 memset(op_data, 0, sizeof(*op_data));
2543 op_data->id1 = *(rec->ur_id1);
2544 rc = md_link(mds->mds_md_exp, op_data, &request);
2545 OBD_FREE(op_data, sizeof(*op_data));
2548 ptlrpc_req_finished(request);
2554 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_tgt_dir->d_inode->i_sb);
2556 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
2557 if (IS_ERR(handle)) {
2558 rc = PTR_ERR(handle);
2564 rc = fsfilt_add_dir_entry(obd, de_tgt_dir, rec->ur_name,
2565 rec->ur_namelen - 1, id_ino(rec->ur_id1),
2566 id_gen(rec->ur_id1), id_group(rec->ur_id1),
2567 id_fid(rec->ur_id1));
2570 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
2571 handle, req, rc, 0);
2573 switch (cleanup_phase) {
2576 OBD_ALLOC(op_data, sizeof(*op_data));
2577 if (op_data != NULL) {
2579 memset(op_data, 0, sizeof(*op_data));
2581 op_data->id1 = *(rec->ur_id1);
2582 op_data->create_mode = rec->ur_mode;
2584 rc = md_unlink(mds->mds_md_exp, op_data, &request);
2585 OBD_FREE(op_data, sizeof(*op_data));
2587 ptlrpc_req_finished(request);
2589 CERROR("error %d while dropping i_nlink on "
2590 "remote inode\n", rc);
2593 CERROR("rc %d prevented dropping i_nlink on "
2594 "remote inode\n", -ENOMEM);
2600 ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
2602 ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
2605 ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
2607 ptlrpc_save_lock(req, tgt_dir_lockh + 1, update_mode);
2613 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2616 req->rq_status = rc;
2620 static int mds_reint_link(struct mds_update_record *rec, int offset,
2621 struct ptlrpc_request *req, struct lustre_handle *lh)
2623 struct obd_device *obd = req->rq_export->exp_obd;
2624 struct dentry *de_src = NULL;
2625 struct dentry *de_tgt_dir = NULL;
2626 struct dentry *dchild = NULL;
2627 struct mds_obd *mds = mds_req2mds(req);
2628 struct lustre_handle *handle = NULL;
2629 struct lustre_handle tgt_dir_lockh[2] = {{0}, {0}}, src_lockh = {0};
2630 struct ldlm_res_id src_res_id = { .name = {0} };
2631 struct ldlm_res_id tgt_dir_res_id = { .name = {0} };
2632 ldlm_policy_data_t src_policy ={.l_inodebits = {MDS_INODELOCK_UPDATE}};
2633 ldlm_policy_data_t tgt_dir_policy =
2634 {.l_inodebits = {MDS_INODELOCK_UPDATE}};
2635 int rc = 0, cleanup_phase = 0;
2637 int update_mode = 0;
2641 LASSERT(offset == 1);
2643 DEBUG_REQ(D_INODE, req, "original "LPU64"/%u to "LPU64"/%u %s",
2644 id_ino(rec->ur_id1), id_gen(rec->ur_id1),
2645 id_ino(rec->ur_id2), id_gen(rec->ur_id2),
2648 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
2649 MD_COUNTER_INCREMENT(obd, link);
2651 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
2652 GOTO(cleanup, rc = -ENOENT);
2654 if (id_group(rec->ur_id1) != mds->mds_num) {
2655 rc = mds_reint_link_to_remote(rec, offset, req, lh);
2659 if (rec->ur_namelen == 1) {
2660 rc = mds_reint_link_acquire(rec, offset, req, lh);
2664 /* Step 1: Lookup the source inode and target directory by ID */
2665 de_src = mds_id2dentry(obd, rec->ur_id1, NULL);
2667 GOTO(cleanup, rc = PTR_ERR(de_src));
2669 cleanup_phase = 1; /* source dentry */
2671 de_tgt_dir = mds_id2dentry(obd, rec->ur_id2, NULL);
2672 if (IS_ERR(de_tgt_dir)) {
2673 rc = PTR_ERR(de_tgt_dir);
2678 cleanup_phase = 2; /* target directory dentry */
2680 CDEBUG(D_INODE, "linking %*s/%s to inode %lu\n",
2681 de_tgt_dir->d_name.len, de_tgt_dir->d_name.name,
2682 rec->ur_name, de_src->d_inode->i_ino);
2684 /* Step 2: Take the two locks */
2685 src_res_id.name[0] = id_fid(rec->ur_id1);
2686 src_res_id.name[1] = id_group(rec->ur_id1);
2687 tgt_dir_res_id.name[0] = id_fid(rec->ur_id2);
2688 tgt_dir_res_id.name[1] = id_group(rec->ur_id2);
2691 if (IS_PDIROPS(de_tgt_dir->d_inode)) {
2692 int flags = LDLM_FL_ATOMIC_CB;
2693 update_mode = mds_lock_mode_for_dir(obd, de_tgt_dir, LCK_EX);
2695 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
2696 tgt_dir_res_id, LDLM_IBITS,
2697 &src_policy, update_mode, &flags,
2699 ldlm_completion_ast, NULL, NULL,
2700 NULL, 0, NULL, tgt_dir_lockh + 1);
2702 GOTO(cleanup, rc = -ENOLCK);
2705 tgt_dir_res_id.name[2] = full_name_hash((unsigned char *)rec->ur_name,
2706 rec->ur_namelen - 1);
2707 CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n",
2708 (unsigned long)id_fid(rec->ur_id2),
2709 (unsigned long)id_group(rec->ur_id2),
2710 tgt_dir_res_id.name[2]);
2713 rc = enqueue_ordered_locks(obd, &src_res_id, &src_lockh, LCK_EX,
2714 &src_policy, &tgt_dir_res_id, tgt_dir_lockh,
2715 LCK_EX, &tgt_dir_policy);
2719 cleanup_phase = 3; /* locks */
2721 /* Step 3: Lookup the child */
2722 dchild = ll_lookup_one_len(rec->ur_name, de_tgt_dir,
2723 rec->ur_namelen - 1);
2724 if (IS_ERR(dchild)) {
2725 rc = PTR_ERR(dchild);
2726 if (rc != -EPERM && rc != -EACCES)
2727 CERROR("child lookup error %d\n", rc);
2731 cleanup_phase = 4; /* child dentry */
2733 if (dchild->d_inode) {
2734 CDEBUG(D_INODE, "child exists (dir %lu, name %s)\n",
2735 de_tgt_dir->d_inode->i_ino, rec->ur_name);
2740 /* Step 4: Do it. */
2741 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
2743 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
2744 if (IS_ERR(handle)) {
2745 rc = PTR_ERR(handle);
2749 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
2750 if (rc && rc != -EPERM && rc != -EACCES)
2751 CERROR("vfs_link error %d\n", rc);
2753 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
2754 handle, req, rc, 0);
2757 switch (cleanup_phase) {
2758 case 4: /* child dentry */
2762 ldlm_lock_decref(&src_lockh, LCK_EX);
2763 ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
2765 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
2766 ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
2768 case 2: /* target dentry */
2770 if (tgt_dir_lockh[1].cookie && update_mode)
2771 ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
2775 case 1: /* source dentry */
2780 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2783 req->rq_status = rc;
2787 /* The idea here is that we need to get four locks in the end:
2788 * one on each parent directory, one on each child. We need to take
2789 * these locks in some kind of order (to avoid deadlocks), and the order
2790 * I selected is "increasing resource number" order. We need to look up
2791 * the children, however, before we know what the resource number(s) are.
2792 * Thus the following plan:
2794 * 1,2. Look up the parents
2795 * 3,4. Look up the children
2796 * 5. Take locks on the parents and children, in order
2797 * 6. Verify that the children haven't changed since they were looked up
2799 * If there was a race and the children changed since they were first looked
2800 * up, it is possible that mds_verify_child() will be able to just grab the
2801 * lock on the new child resource (if it has a higher resource than any other)
2802 * but we need to compare against not only its parent, but also against the
2803 * parent and child of the "other half" of the rename, hence maxres_{src,tgt}.
2805 * We need the fancy igrab() on the child inodes because we aren't holding a
2806 * lock on the parent after the lookup is done, so dentry->d_inode may change
2807 * at any time, and igrab() itself doesn't like getting passed a NULL argument.
2809 static int mds_get_parents_children_locked(struct obd_device *obd,
2810 struct mds_obd *mds,
2811 struct lustre_id *p1_id,
2812 struct dentry **de_srcdirp,
2813 struct lustre_id *p2_id,
2814 struct dentry **de_tgtdirp,
2816 const char *old_name, int old_len,
2817 struct dentry **de_oldp,
2818 const char *new_name, int new_len,
2819 struct dentry **de_newp,
2820 struct lustre_handle *dlm_handles,
2823 struct ldlm_res_id p1_res_id = { .name = {0} };
2824 struct ldlm_res_id p2_res_id = { .name = {0} };
2825 struct ldlm_res_id c1_res_id = { .name = {0} };
2826 struct ldlm_res_id c2_res_id = { .name = {0} };
2827 ldlm_policy_data_t p_policy = {.l_inodebits = {MDS_INODELOCK_UPDATE}};
2828 /* Only dentry should disappear, but the inode itself would be
2829 intact otherwise. */
2830 ldlm_policy_data_t c1_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP}};
2831 /* If something is going to be replaced, both dentry and inode locks are
2833 ldlm_policy_data_t c2_policy = {.l_inodebits = {MDS_INODELOCK_FULL}};
2834 struct ldlm_res_id *maxres_src, *maxres_tgt;
2835 struct inode *inode;
2836 int rc = 0, cleanup_phase = 0;
2837 __u32 child_gen1 = 0;
2838 __u32 child_gen2 = 0;
2839 unsigned long child_ino1 = 0;
2840 unsigned long child_ino2 = 0;
2843 /* Step 1: Lookup the source directory */
2844 *de_srcdirp = mds_id2dentry(obd, p1_id, NULL);
2845 if (IS_ERR(*de_srcdirp))
2846 GOTO(cleanup, rc = PTR_ERR(*de_srcdirp));
2848 cleanup_phase = 1; /* source directory dentry */
2850 p1_res_id.name[0] = id_fid(p1_id);
2851 p1_res_id.name[1] = id_group(p1_id);
2853 /* Step 2: Lookup the target directory */
2854 if (id_equal_stc(p1_id, p2_id)) {
2855 *de_tgtdirp = dget(*de_srcdirp);
2857 *de_tgtdirp = mds_id2dentry(obd, p2_id, NULL);
2858 if (IS_ERR(*de_tgtdirp)) {
2859 rc = PTR_ERR(*de_tgtdirp);
2865 cleanup_phase = 2; /* target directory dentry */
2867 p2_res_id.name[0] = id_fid(p2_id);
2868 p2_res_id.name[1] = id_group(p2_id);
2871 dlm_handles[5].cookie = 0;
2872 dlm_handles[6].cookie = 0;
2874 if (IS_PDIROPS((*de_srcdirp)->d_inode)) {
2876 * get a temp lock on just fid, group to flush client cache and
2877 * to protect dirs from concurrent splitting.
2879 rc = enqueue_ordered_locks(obd, &p1_res_id, &dlm_handles[5],
2880 LCK_PW, &p_policy, &p2_res_id,
2881 &dlm_handles[6], LCK_PW, &p_policy);
2885 p1_res_id.name[2] = full_name_hash((unsigned char *)old_name,
2887 p2_res_id.name[2] = full_name_hash((unsigned char *)new_name,
2890 CDEBUG(D_INFO, "take locks on "
2891 LPX64":"LPX64":"LPX64", "LPX64":"LPX64":"LPX64"\n",
2892 p1_res_id.name[0], p1_res_id.name[1], p1_res_id.name[2],
2893 p2_res_id.name[0], p2_res_id.name[1], p2_res_id.name[2]);
2898 /* Step 3: Lookup the source child entry */
2899 *de_oldp = ll_lookup_one_len(old_name, *de_srcdirp,
2901 if (IS_ERR(*de_oldp)) {
2902 rc = PTR_ERR(*de_oldp);
2903 CERROR("old child lookup error (%.*s): %d\n",
2904 old_len - 1, old_name, rc);
2908 cleanup_phase = 4; /* original name dentry */
2910 inode = (*de_oldp)->d_inode;
2911 if (inode != NULL) {
2912 struct lustre_id sid;
2914 inode = igrab(inode);
2916 GOTO(cleanup, rc = -ENOENT);
2918 down(&inode->i_sem);
2919 rc = mds_read_inode_sid(obd, inode, &sid);
2922 CERROR("Can't read inode self id, inode %lu, "
2923 "rc %d\n", inode->i_ino, rc);
2928 child_ino1 = inode->i_ino;
2929 child_gen1 = inode->i_generation;
2930 c1_res_id.name[0] = id_fid(&sid);
2931 c1_res_id.name[1] = id_group(&sid);
2933 } else if ((*de_oldp)->d_flags & DCACHE_CROSS_REF) {
2934 child_ino1 = (*de_oldp)->d_inum;
2935 child_gen1 = (*de_oldp)->d_generation;
2936 c1_res_id.name[0] = (*de_oldp)->d_fid;
2937 c1_res_id.name[1] = (*de_oldp)->d_mdsnum;
2939 GOTO(cleanup, rc = -ENOENT);
2942 /* Step 4: Lookup the target child entry */
2943 *de_newp = ll_lookup_one_len(new_name, *de_tgtdirp,
2945 if (IS_ERR(*de_newp)) {
2946 rc = PTR_ERR(*de_newp);
2947 CERROR("new child lookup error (%.*s): %d\n",
2948 old_len - 1, old_name, rc);
2952 cleanup_phase = 5; /* target dentry */
2954 inode = (*de_newp)->d_inode;
2955 if (inode != NULL) {
2956 struct lustre_id sid;
2958 inode = igrab(inode);
2962 down(&inode->i_sem);
2963 rc = mds_read_inode_sid(obd, inode, &sid);
2966 CERROR("Can't read inode self id, inode %lu, "
2967 "rc %d\n", inode->i_ino, rc);
2971 child_ino2 = inode->i_ino;
2972 child_gen2 = inode->i_generation;
2973 c2_res_id.name[0] = id_fid(&sid);
2974 c2_res_id.name[1] = id_group(&sid);
2976 } else if ((*de_newp)->d_flags & DCACHE_CROSS_REF) {
2977 child_ino2 = (*de_newp)->d_inum;
2978 child_gen2 = (*de_newp)->d_generation;
2979 c2_res_id.name[0] = (*de_newp)->d_fid;
2980 c2_res_id.name[1] = (*de_newp)->d_mdsnum;
2984 /* Step 5: Take locks on the parents and child(ren) */
2985 maxres_src = &p1_res_id;
2986 maxres_tgt = &p2_res_id;
2987 cleanup_phase = 5; /* target dentry */
2989 if (c1_res_id.name[0] != 0 && res_gt(&c1_res_id, &p1_res_id, NULL, NULL))
2990 maxres_src = &c1_res_id;
2991 if (c2_res_id.name[0] != 0 && res_gt(&c2_res_id, &p2_res_id, NULL, NULL))
2992 maxres_tgt = &c2_res_id;
2994 rc = enqueue_4ordered_locks(obd, &p1_res_id, &dlm_handles[0], parent_mode,
2996 &p2_res_id, &dlm_handles[1], parent_mode,
2998 &c1_res_id, &dlm_handles[2], child_mode,
3000 &c2_res_id, &dlm_handles[3], child_mode,
3005 cleanup_phase = 6; /* parent and child(ren) locks */
3007 /* Step 6a: Re-lookup source child to verify it hasn't changed */
3008 rc = mds_verify_child(obd, &p1_res_id, &dlm_handles[0], *de_srcdirp,
3009 parent_mode, &c1_res_id, &dlm_handles[2],
3010 de_oldp, child_mode, &c1_policy, old_name, old_len,
3011 maxres_tgt, child_ino1, child_gen1);
3013 if (c2_res_id.name[0] != 0)
3014 ldlm_lock_decref(&dlm_handles[3], child_mode);
3015 ldlm_lock_decref(&dlm_handles[1], parent_mode);
3022 if (!DENTRY_VALID(*de_oldp))
3023 GOTO(cleanup, rc = -ENOENT);
3025 /* Step 6b: Re-lookup target child to verify it hasn't changed */
3026 rc = mds_verify_child(obd, &p2_res_id, &dlm_handles[1], *de_tgtdirp,
3027 parent_mode, &c2_res_id, &dlm_handles[3],
3028 de_newp, child_mode, &c2_policy, new_name,
3029 new_len, maxres_src, child_ino2, child_gen2);
3031 ldlm_lock_decref(&dlm_handles[2], child_mode);
3032 ldlm_lock_decref(&dlm_handles[0], parent_mode);
3042 switch (cleanup_phase) {
3043 case 6: /* child lock(s) */
3044 if (c2_res_id.name[0] != 0)
3045 ldlm_lock_decref(&dlm_handles[3], child_mode);
3046 if (c1_res_id.name[0] != 0)
3047 ldlm_lock_decref(&dlm_handles[2], child_mode);
3048 if (dlm_handles[1].cookie != 0)
3049 ldlm_lock_decref(&dlm_handles[1], parent_mode);
3050 if (dlm_handles[0].cookie != 0)
3051 ldlm_lock_decref(&dlm_handles[0], parent_mode);
3052 case 5: /* target dentry */
3054 case 4: /* source dentry */
3058 if (dlm_handles[5].cookie != 0)
3059 ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
3060 if (dlm_handles[6].cookie != 0)
3061 ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
3063 case 2: /* target directory dentry */
3064 l_dput(*de_tgtdirp);
3065 case 1: /* source directry dentry */
3066 l_dput(*de_srcdirp);
3074 * checks if dentry can be removed. This function also handles cross-ref
3077 static int mds_check_for_rename(struct obd_device *obd,
3078 struct dentry *dentry)
3080 struct mds_obd *mds = &obd->u.mds;
3081 struct lustre_handle *rlockh;
3082 struct ptlrpc_request *req;
3083 struct mdc_op_data *op_data;
3084 struct lookup_intent it;
3085 int handle_size, rc = 0;
3088 LASSERT(dentry != NULL);
3090 if (dentry->d_inode) {
3091 if (S_ISDIR(dentry->d_inode->i_mode) &&
3092 !mds_is_dir_empty(obd, dentry))
3095 LASSERT((dentry->d_flags & DCACHE_CROSS_REF));
3096 handle_size = sizeof(struct lustre_handle);
3098 OBD_ALLOC(rlockh, handle_size);
3102 memset(rlockh, 0, handle_size);
3103 OBD_ALLOC(op_data, sizeof(*op_data));
3104 if (op_data == NULL) {
3105 OBD_FREE(rlockh, handle_size);
3108 memset(op_data, 0, sizeof(*op_data));
3109 mds_pack_dentry2id(obd, &op_data->id1, dentry, 1);
3111 it.it_op = IT_UNLINK;
3112 OBD_ALLOC(it.d.fs_data, sizeof(struct lustre_intent_data));
3115 rc = md_enqueue(mds->mds_md_exp, LDLM_IBITS, &it, LCK_EX,
3116 op_data, rlockh, NULL, 0, ldlm_completion_ast,
3117 mds_blocking_ast, NULL);
3118 OBD_FREE(op_data, sizeof(*op_data));
3122 OBD_FREE(it.d.fs_data,
3123 sizeof(struct lustre_intent_data));
3126 if (rlockh->cookie != 0)
3127 ldlm_lock_decref(rlockh, LCK_EX);
3129 if (LUSTRE_IT(&it)->it_data) {
3130 req = (struct ptlrpc_request *)LUSTRE_IT(&it)->it_data;
3131 ptlrpc_req_finished(req);
3134 if (LUSTRE_IT(&it)->it_status)
3135 rc = LUSTRE_IT(&it)->it_status;
3136 OBD_FREE(it.d.fs_data, sizeof(struct lustre_intent_data));
3137 OBD_FREE(rlockh, handle_size);
3142 static int mds_add_local_dentry(struct mds_update_record *rec, int offset,
3143 struct ptlrpc_request *req, struct lustre_id *id,
3144 struct dentry *de_dir, struct dentry *de)
3146 struct obd_device *obd = req->rq_export->exp_obd;
3147 struct mds_obd *mds = mds_req2mds(req);
3148 void *handle = NULL;
3154 * name exists and points to local inode try to unlink this name
3155 * and create new one.
3157 CDEBUG(D_OTHER, "%s: %s points to local inode %lu/%lu\n",
3158 obd->obd_name, rec->ur_tgt, (unsigned long)de->d_inode->i_ino,
3159 (unsigned long)de->d_inode->i_generation);
3161 /* checking if we can remove local dentry. */
3162 rc = mds_check_for_rename(obd, de);
3166 handle = fsfilt_start(obd, de_dir->d_inode,
3167 FSFILT_OP_RENAME, NULL);
3169 GOTO(cleanup, rc = PTR_ERR(handle));
3170 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de);
3173 } else if (de->d_flags & DCACHE_CROSS_REF) {
3174 CDEBUG(D_OTHER, "%s: %s points to remote inode %lu/%lu\n",
3175 obd->obd_name, rec->ur_tgt, (unsigned long)de->d_mdsnum,
3176 (unsigned long)de->d_fid);
3178 /* checking if we can remove local dentry. */
3179 rc = mds_check_for_rename(obd, de);
3184 * to be fully POSIX compatible, we should add one more check:
3186 * if de_new is subdir of dir rec->ur_id1. If so - return
3189 * I do not know how to implement it right now, because
3190 * inodes/dentries for new and old names lie on different MDS,
3191 * so add this notice here just to make it visible for the rest
3192 * of developers and do not forget about. And when this check
3193 * will be added, del_cross_ref should gone, that is local
3194 * dentry is able to be removed if all checks passed. --umka
3197 handle = fsfilt_start(obd, de_dir->d_inode,
3198 FSFILT_OP_RENAME, NULL);
3200 GOTO(cleanup, rc = PTR_ERR(handle));
3201 rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de);
3205 /* name doesn't exist. the simplest case. */
3206 handle = fsfilt_start(obd, de_dir->d_inode,
3207 FSFILT_OP_LINK, NULL);
3209 GOTO(cleanup, rc = PTR_ERR(handle));
3212 rc = fsfilt_add_dir_entry(obd, de_dir, rec->ur_tgt,
3213 rec->ur_tgtlen - 1, id_ino(id),
3214 id_gen(id), id_group(id), id_fid(id));
3216 CERROR("add_dir_entry() returned error %d\n", rc);
3222 rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL,
3223 handle, req, rc, 0);
3228 static int mds_del_local_dentry(struct mds_update_record *rec, int offset,
3229 struct ptlrpc_request *req, struct dentry *de_dir,
3232 struct obd_device *obd = req->rq_export->exp_obd;
3233 struct mds_obd *mds = mds_req2mds(req);
3234 void *handle = NULL;
3238 handle = fsfilt_start(obd, de_dir->d_inode, FSFILT_OP_UNLINK, NULL);
3240 GOTO(cleanup, rc = PTR_ERR(handle));
3241 rc = fsfilt_del_dir_entry(obd, de);
3246 rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL,
3247 handle, req, rc, 0);
3251 static int mds_reint_rename_create_name(struct mds_update_record *rec,
3252 int offset, struct ptlrpc_request *req)
3254 struct lustre_handle parent_lockh[2] = {{0}, {0}};
3255 struct obd_device *obd = req->rq_export->exp_obd;
3256 struct mds_obd *mds = mds_req2mds(req);
3257 struct lustre_handle child_lockh = {0};
3258 struct dentry *de_tgtdir = NULL;
3259 struct dentry *de_new = NULL;
3260 int cleanup_phase = 0;
3261 int update_mode, rc = 0;
3262 struct lustre_id ids[2]; /* sid, pid */
3266 * another MDS executing rename operation has asked us to create target
3267 * name. such a creation should destroy existing target name.
3269 CDEBUG(D_OTHER, "%s: request to create name %s for "DLID4"\n",
3270 obd->obd_name, rec->ur_tgt, OLID4(rec->ur_id1));
3272 /* first, lookup the target */
3273 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id2, parent_lockh,
3274 &de_tgtdir, LCK_PW, MDS_INODELOCK_UPDATE,
3275 &update_mode, rec->ur_tgt, rec->ur_tgtlen,
3276 &child_lockh, &de_new, LCK_EX,
3277 MDS_INODELOCK_LOOKUP);
3281 /* get parent id: ldlm lock on the parent protects ea */
3282 rc = mds_read_inode_sid(obd, de_tgtdir->d_inode, &ids[1]);
3289 LASSERT(de_tgtdir->d_inode);
3292 rc = mds_add_local_dentry(rec, offset, req, rec->ur_id1,
3297 ids[0] = *(rec->ur_id1);
3298 rc = obd_set_info(mds->mds_md_obd->u.lmv.tgts[id_group(rec->ur_id1)].ltd_exp,
3299 strlen("ids"), "ids",
3300 sizeof(struct lustre_id) * 2, ids);
3305 if (cleanup_phase == 1) {
3307 if (parent_lockh[1].cookie != 0)
3308 ldlm_lock_decref(parent_lockh + 1, update_mode);
3310 ldlm_lock_decref(parent_lockh, LCK_PW);
3311 if (child_lockh.cookie != 0)
3312 ldlm_lock_decref(&child_lockh, LCK_EX);
3317 req->rq_status = rc;
3321 static int mds_reint_rename_to_remote(struct mds_update_record *rec, int offset,
3322 struct ptlrpc_request *req)
3324 struct obd_device *obd = req->rq_export->exp_obd;
3325 struct ptlrpc_request *req2 = NULL;
3326 struct dentry *de_srcdir = NULL;
3327 struct dentry *de_old = NULL;
3328 struct mds_obd *mds = mds_req2mds(req);
3329 struct lustre_handle parent_lockh[2] = {{0}, {0}};
3330 struct lustre_handle child_lockh = {0};
3331 struct mdc_op_data *op_data;
3332 int update_mode, rc = 0;
3335 CDEBUG(D_OTHER, "%s: move name %s onto another mds #%lu\n",
3336 obd->obd_name, rec->ur_name, (unsigned long)id_group(rec->ur_id2));
3338 OBD_ALLOC(op_data, sizeof(*op_data));
3339 if (op_data == NULL)
3341 memset(op_data, 0, sizeof(*op_data));
3343 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1, parent_lockh,
3344 &de_srcdir, LCK_PW, MDS_INODELOCK_UPDATE,
3345 &update_mode, rec->ur_name,
3346 rec->ur_namelen, &child_lockh, &de_old,
3347 LCK_EX, MDS_INODELOCK_LOOKUP);
3349 OBD_FREE(op_data, sizeof(*op_data));
3354 LASSERT(de_srcdir->d_inode);
3358 * we already know the target should be created on another MDS so, we
3359 * have to request that MDS to do it.
3362 /* prepare source id */
3363 if (de_old->d_flags & DCACHE_CROSS_REF) {
3364 LASSERT(de_old->d_inode == NULL);
3365 CDEBUG(D_OTHER, "request to move remote name\n");
3366 mds_pack_dentry2id(obd, &op_data->id1, de_old, 1);
3367 } else if (de_old->d_inode == NULL) {
3368 /* oh, source doesn't exist */
3369 OBD_FREE(op_data, sizeof(*op_data));
3370 GOTO(cleanup, rc = -ENOENT);
3372 struct lustre_id sid;
3373 struct inode *inode = de_old->d_inode;
3375 LASSERT(inode != NULL);
3376 CDEBUG(D_OTHER, "request to move local name\n");
3377 id_ino(&op_data->id1) = inode->i_ino;
3378 id_group(&op_data->id1) = mds->mds_num;
3379 id_gen(&op_data->id1) = inode->i_generation;
3381 down(&inode->i_sem);
3382 rc = mds_read_inode_sid(obd, inode, &sid);
3385 CERROR("Can't read inode self id, "
3386 "inode %lu, rc = %d\n",
3391 id_fid(&op_data->id1) = id_fid(&sid);
3394 op_data->id2 = *rec->ur_id2;
3395 rc = md_rename(mds->mds_md_exp, op_data, NULL, 0,
3396 rec->ur_tgt, rec->ur_tgtlen - 1, &req2);
3397 OBD_FREE(op_data, sizeof(*op_data));
3402 rc = mds_del_local_dentry(rec, offset, req, de_srcdir,
3408 ptlrpc_req_finished(req2);
3411 if (parent_lockh[1].cookie != 0)
3412 ldlm_lock_decref(parent_lockh + 1, update_mode);
3414 ldlm_lock_decref(parent_lockh, LCK_PW);
3415 if (child_lockh.cookie != 0)
3416 ldlm_lock_decref(&child_lockh, LCK_EX);
3421 req->rq_status = rc;
3425 static int mds_reint_rename(struct mds_update_record *rec, int offset,
3426 struct ptlrpc_request *req, struct lustre_handle *lockh)
3428 struct obd_device *obd = req->rq_export->exp_obd;
3429 struct dentry *de_srcdir = NULL;
3430 struct dentry *de_tgtdir = NULL;
3431 struct dentry *de_old = NULL;
3432 struct dentry *de_new = NULL;
3433 struct inode *old_inode = NULL, *new_inode = NULL;
3434 struct mds_obd *mds = mds_req2mds(req);
3435 struct lustre_handle dlm_handles[7] = {{0},{0},{0},{0},{0},{0},{0}};
3436 struct mds_body *body = NULL;
3437 struct llog_create_locks *lcl = NULL;
3438 struct lov_mds_md *lmm = NULL;
3439 int rc = 0, cleanup_phase = 0;
3440 struct lustre_id ids[2]; /* sid, pid */
3441 void *handle = NULL;
3444 LASSERT(offset == 1);
3446 DEBUG_REQ(D_INODE, req, "parent "DLID4" %s to "DLID4" %s",
3447 OLID4(rec->ur_id1), rec->ur_name, OLID4(rec->ur_id2),
3450 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
3452 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
3453 DEBUG_REQ(D_HA, req, "rename replay");
3454 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
3455 lustre_msg_buf(req->rq_reqmsg, offset + 3, 0),
3456 req->rq_repmsg->buflens[2]);
3459 MD_COUNTER_INCREMENT(obd, rename);
3461 if (rec->ur_namelen == 1) {
3462 rc = mds_reint_rename_create_name(rec, offset, req);
3466 /* check if new name should be located on remote target. */
3467 if (id_group(rec->ur_id2) != mds->mds_num) {
3468 rc = mds_reint_rename_to_remote(rec, offset, req);
3472 rc = mds_get_parents_children_locked(obd, mds, rec->ur_id1, &de_srcdir,
3473 rec->ur_id2, &de_tgtdir, LCK_PW,
3474 rec->ur_name, rec->ur_namelen,
3475 &de_old, rec->ur_tgt,
3476 rec->ur_tgtlen, &de_new,
3477 dlm_handles, LCK_EX);
3481 cleanup_phase = 1; /* parent(s), children, locks */
3482 old_inode = de_old->d_inode;
3483 new_inode = de_new->d_inode;
3485 /* sanity check for src inode */
3486 if (de_old->d_flags & DCACHE_CROSS_REF) {
3487 LASSERT(de_old->d_inode == NULL);
3490 * in the case of cross-ref dir, we can perform this check only
3491 * if child and parent lie on the same mds. This is because
3492 * otherwise they can have the same inode numbers.
3494 if (de_old->d_mdsnum == mds->mds_num) {
3495 if (de_old->d_inum == de_srcdir->d_inode->i_ino ||
3496 de_old->d_inum == de_tgtdir->d_inode->i_ino)
3497 GOTO(cleanup, rc = -EINVAL);
3500 LASSERT(de_old->d_inode != NULL);
3501 if (de_old->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
3502 de_old->d_inode->i_ino == de_tgtdir->d_inode->i_ino)
3503 GOTO(cleanup, rc = -EINVAL);
3506 /* sanity check for dest inode */
3507 if (de_new->d_flags & DCACHE_CROSS_REF) {
3508 LASSERT(new_inode == NULL);
3510 /* the same check about target dentry. */
3511 if (de_new->d_mdsnum == mds->mds_num) {
3512 if (de_new->d_inum == de_srcdir->d_inode->i_ino ||
3513 de_new->d_inum == de_tgtdir->d_inode->i_ino)
3514 GOTO(cleanup, rc = -EINVAL);
3518 * regular files usualy do not have ->rename() implemented. But
3519 * we handle only this case when @de_new is cross-ref entry,
3520 * because in other cases it will be handled by vfs_rename().
3522 if (de_old->d_inode && (!de_old->d_inode->i_op ||
3523 !de_old->d_inode->i_op->rename))
3524 GOTO(cleanup, rc = -EPERM);
3527 (new_inode->i_ino == de_srcdir->d_inode->i_ino ||
3528 new_inode->i_ino == de_tgtdir->d_inode->i_ino))
3529 GOTO(cleanup, rc = -EINVAL);
3534 * check if inodes point to each other. This should be checked before
3535 * is_subdir() check, as for the same entries it will think that they
3538 if (!(de_old->d_flags & DCACHE_CROSS_REF) &&
3539 !(de_new->d_flags & DCACHE_CROSS_REF) &&
3540 old_inode == new_inode)
3541 GOTO(cleanup, rc = 0);
3543 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
3545 * check if we are moving old entry into its child. 2.6 does not check
3546 * for this in vfs_rename() anymore.
3548 if (is_subdir(de_new, de_old))
3549 GOTO(cleanup, rc = -EINVAL);
3553 * if we are about to remove the target at first, pass the EA of that
3554 * inode to client to perform and cleanup on OST.
3556 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
3557 LASSERT(body != NULL);
3559 /* get new parent id: ldlm lock on the parent protects ea */
3560 rc = mds_read_inode_sid(obd, de_tgtdir->d_inode, &ids[1]);
3564 /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
3566 DOWN_READ_I_ALLOC_SEM(new_inode);
3568 cleanup_phase = 2; /* up(&new_inode->i_sem) when finished */
3570 if (new_inode && ((S_ISDIR(new_inode->i_mode) &&
3571 new_inode->i_nlink == 2) ||
3572 new_inode->i_nlink == 1)) {
3573 if (mds_orphan_open_count(new_inode) > 0) {
3574 /* need to lock pending_dir before transaction */
3575 down(&mds->mds_pending_dir->d_inode->i_sem);
3576 cleanup_phase = 3; /* up(&pending_dir->i_sem) */
3577 } else if (S_ISREG(new_inode->i_mode)) {
3578 mds_pack_inode2body(obd, body, new_inode, 0);
3579 mds_pack_md(obd, req->rq_repmsg, 1, body,
3580 new_inode, MDS_PACK_MD_LOCK, 0);
3584 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
3585 de_srcdir->d_inode->i_sb);
3587 if (de_old->d_flags & DCACHE_CROSS_REF) {
3588 struct lustre_id old_id;
3589 struct obd_export *tgt_exp =
3590 mds->mds_md_obd->u.lmv.tgts[de_old->d_mdsnum].ltd_exp;
3593 mds_pack_dentry2id(obd, &old_id, de_old, 1);
3595 rc = mds_add_local_dentry(rec, offset, req, &old_id,
3600 rc = mds_del_local_dentry(rec, offset, req, de_srcdir,
3606 rc = obd_set_info(tgt_exp, strlen("ids"), "ids",
3607 sizeof(struct lustre_id) * 2, ids);
3612 lmm = lustre_msg_buf(req->rq_repmsg, 1, 0);
3613 handle = fsfilt_start_log(obd, de_tgtdir->d_inode, FSFILT_OP_RENAME,
3614 NULL, le32_to_cpu(lmm->lmm_stripe_count));
3617 GOTO(cleanup, rc = PTR_ERR(handle));
3620 de_old->d_fsdata = req;
3621 de_new->d_fsdata = req;
3622 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
3625 if (rc == 0 && new_inode != NULL && new_inode->i_nlink == 0) {
3626 if (mds_orphan_open_count(new_inode) > 0)
3627 rc = mds_orphan_add_link(rec, obd, de_new);
3630 GOTO(cleanup, rc = 0);
3632 if (!S_ISREG(new_inode->i_mode))
3635 if (!(body->valid & OBD_MD_FLEASIZE)) {
3636 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
3637 OBD_MD_FLATIME | OBD_MD_FLMTIME);
3638 } else if (mds_log_op_unlink(obd, new_inode,
3639 lustre_msg_buf(req->rq_repmsg,1,0),
3640 req->rq_repmsg->buflens[1],
3641 lustre_msg_buf(req->rq_repmsg,2,0),
3642 req->rq_repmsg->buflens[2],
3644 body->valid |= OBD_MD_FLCOOKIE;
3647 rc = mds_destroy_object(obd, old_inode, 1);
3649 CERROR("can't remove OST object, err %d\n",
3655 rc = mds_update_inode_ids(obd, de_old->d_inode,
3656 handle, NULL, &ids[1]);
3660 rc = mds_finish_transno(mds, (de_tgtdir ? de_tgtdir->d_inode : NULL),
3661 handle, req, rc, 0);
3663 switch (cleanup_phase) {
3665 up(&mds->mds_pending_dir->d_inode->i_sem);
3668 UP_READ_I_ALLOC_SEM(new_inode);
3671 if (dlm_handles[5].cookie != 0)
3672 ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
3673 if (dlm_handles[6].cookie != 0)
3674 ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
3677 ptlrpc_save_llog_lock(req, lcl);
3680 if (dlm_handles[3].cookie != 0)
3681 ldlm_lock_decref(&(dlm_handles[3]), LCK_EX);
3682 ldlm_lock_decref(&(dlm_handles[2]), LCK_EX);
3683 ldlm_lock_decref(&(dlm_handles[1]), LCK_PW);
3684 ldlm_lock_decref(&(dlm_handles[0]), LCK_PW);
3686 if (dlm_handles[3].cookie != 0)
3687 ptlrpc_save_lock(req,&(dlm_handles[3]), LCK_EX);
3688 ptlrpc_save_lock(req, &(dlm_handles[2]), LCK_EX);
3689 ptlrpc_save_lock(req, &(dlm_handles[1]), LCK_PW);
3690 ptlrpc_save_lock(req, &(dlm_handles[0]), LCK_PW);
3699 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
3702 req->rq_status = rc;
3706 typedef int (*mds_reinter)(struct mds_update_record *, int offset,
3707 struct ptlrpc_request *, struct lustre_handle *);
3709 static mds_reinter reinters[REINT_MAX + 1] = {
3710 [REINT_SETATTR] mds_reint_setattr,
3711 [REINT_CREATE] mds_reint_create,
3712 [REINT_LINK] mds_reint_link,
3713 [REINT_UNLINK] mds_reint_unlink,
3714 [REINT_RENAME] mds_reint_rename,
3715 [REINT_OPEN] mds_open
3718 int mds_reint_rec(struct mds_update_record *rec, int offset,
3719 struct ptlrpc_request *req, struct lustre_handle *lockh)
3721 struct obd_device *obd = req->rq_export->exp_obd;
3722 struct lvfs_run_ctxt saved;
3725 /* checked by unpacker */
3726 LASSERT(rec->ur_opcode <= REINT_MAX &&
3727 reinters[rec->ur_opcode] != NULL);
3729 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
3730 rc = reinters[rec->ur_opcode] (rec, offset, req, lockh);
3731 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);