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) 2002-2005 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 the Lustre file system, http://www.lustre.org
13 * Lustre is a trademark of Cluster File Systems, Inc.
15 * You may have signed or agreed to another license before downloading
16 * this software. If so, you are bound by the terms and conditions
17 * of that agreement, and the following does not apply to you. See the
18 * LICENSE file included with this distribution for more information.
20 * If you did not agree to a different license, then this copy of Lustre
21 * is open source software; you can redistribute it and/or modify it
22 * under the terms of version 2 of the GNU General Public License as
23 * published by the Free Software Foundation.
25 * In either case, Lustre is distributed in the hope that it will be
26 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
27 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * license text for more details.
32 # define EXPORT_SYMTAB
34 #define DEBUG_SUBSYSTEM S_MDS
37 #include <obd_support.h>
38 #include <obd_class.h>
40 #include <lustre_lib.h>
41 #include <lustre/lustre_idl.h>
42 #include <lustre_mds.h>
43 #include <lustre_dlm.h>
44 #include <lustre_fsfilt.h>
45 #include <lustre_ucache.h>
47 #include "mds_internal.h"
49 void mds_commit_cb(struct obd_device *obd, __u64 transno, void *data,
52 obd_transno_commit_cb(obd, transno, error);
55 struct mds_logcancel_data {
56 struct lov_mds_md *mlcd_lmm;
60 struct llog_cookie mlcd_cookies[0];
64 static void mds_cancel_cookies_cb(struct obd_device *obd, __u64 transno,
65 void *cb_data, int error)
67 struct mds_logcancel_data *mlcd = cb_data;
68 struct lov_stripe_md *lsm = NULL;
69 struct llog_ctxt *ctxt;
72 obd_transno_commit_cb(obd, transno, error);
74 CDEBUG(D_RPCTRACE, "cancelling %d cookies\n",
75 (int)(mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies)));
77 rc = obd_unpackmd(obd->u.mds.mds_osc_exp, &lsm, mlcd->mlcd_lmm,
78 mlcd->mlcd_eadatalen);
80 CERROR("bad LSM cancelling %d log cookies: rc %d\n",
81 (int)(mlcd->mlcd_cookielen/sizeof(*mlcd->mlcd_cookies)),
84 ///* XXX 0 normally, SENDNOW for debug */);
85 rc = obd_checkmd(obd->u.mds.mds_osc_exp, obd->obd_self_export,
88 CERROR("Can not revalidate lsm %p \n", lsm);
90 ctxt = llog_get_context(obd,mlcd->mlcd_cookies[0].lgc_subsys+1);
91 rc = llog_cancel(ctxt, lsm, mlcd->mlcd_cookielen /
92 sizeof(*mlcd->mlcd_cookies),
93 mlcd->mlcd_cookies, OBD_LLOG_FL_SENDNOW);
95 CERROR("error cancelling %d log cookies: rc %d\n",
96 (int)(mlcd->mlcd_cookielen /
97 sizeof(*mlcd->mlcd_cookies)), rc);
100 OBD_FREE(mlcd, mlcd->mlcd_size);
103 /* Assumes caller has already pushed us into the kernel context. */
104 int mds_finish_transno(struct mds_obd *mds, struct inode *inode, void *handle,
105 struct ptlrpc_request *req, int rc, __u32 op_data,
108 struct mds_export_data *med = &req->rq_export->exp_mds_data;
109 struct mds_client_data *mcd = med->med_mcd;
110 struct obd_device *obd = req->rq_export->exp_obd;
112 __u64 transno, prev_transno;
114 int log_pri = D_RPCTRACE;
117 if (IS_ERR(handle)) {
122 /* if the export has already been failed, we have no last_rcvd slot */
123 if (req->rq_export->exp_failed || obd->obd_fail) {
124 CWARN("commit transaction for disconnected client %s: rc %d\n",
125 req->rq_export->exp_client_uuid.uuid, rc);
133 if (handle == NULL) {
134 /* if we're starting our own xaction, use our own inode */
135 inode = mds->mds_rcvd_filp->f_dentry->d_inode;
136 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
137 if (IS_ERR(handle)) {
138 CERROR("fsfilt_start: %ld\n", PTR_ERR(handle));
139 RETURN(PTR_ERR(handle));
143 off = med->med_lr_off;
145 transno = lustre_msg_get_transno(req->rq_reqmsg);
148 CERROR("%s: replay %s transno "LPU64" failed: rc %d\n",
150 libcfs_nid2str(req->rq_export->exp_connection->c_peer.nid),
154 } else if (transno == 0) {
155 spin_lock(&mds->mds_transno_lock);
156 transno = ++mds->mds_last_transno;
157 spin_unlock(&mds->mds_transno_lock);
159 spin_lock(&mds->mds_transno_lock);
160 if (transno > mds->mds_last_transno)
161 mds->mds_last_transno = transno;
162 spin_unlock(&mds->mds_transno_lock);
165 req->rq_transno = transno;
166 lustre_msg_set_transno(req->rq_repmsg, transno);
167 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
168 prev_transno = le64_to_cpu(mcd->mcd_last_close_transno);
169 mcd->mcd_last_close_transno = cpu_to_le64(transno);
170 mcd->mcd_last_close_xid = cpu_to_le64(req->rq_xid);
171 mcd->mcd_last_close_result = cpu_to_le32(rc);
172 mcd->mcd_last_close_data = cpu_to_le32(op_data);
174 prev_transno = le64_to_cpu(mcd->mcd_last_transno);
175 mcd->mcd_last_transno = cpu_to_le64(transno);
176 mcd->mcd_last_xid = cpu_to_le64(req->rq_xid);
177 mcd->mcd_last_result = cpu_to_le32(rc);
178 mcd->mcd_last_data = cpu_to_le32(op_data);
180 /* update the server data to not lose the greatest transno. Bug 11125 */
181 if ((transno == 0) && (prev_transno == mds->mds_last_transno))
182 mds_update_server_data(obd, 0);
185 CERROR("client idx %d has offset %lld\n", med->med_lr_idx, off);
188 struct obd_export *exp = req->rq_export;
191 force_sync = fsfilt_add_journal_cb(exp->exp_obd,transno,
192 handle, mds_commit_cb,
195 err = fsfilt_write_record(obd, mds->mds_rcvd_filp, mcd,
197 force_sync | exp->exp_need_sync);
199 mds_commit_cb(obd, transno, NULL, err);
208 DEBUG_REQ(log_pri, req,
209 "wrote trans #"LPU64" rc %d client %s at idx %u: err = %d",
210 transno, rc, mcd->mcd_uuid, med->med_lr_idx, err);
212 err = mds_lov_write_objids(obd);
218 CDEBUG(log_pri, "wrote objids: err = %d\n", err);
221 err = fsfilt_commit(obd, inode, handle, 0);
223 CERROR("error committing transaction: %d\n", err);
231 /* this gives the same functionality as the code between
232 * sys_chmod and inode_setattr
233 * chown_common and inode_setattr
234 * utimes and inode_setattr
236 int mds_fix_attr(struct inode *inode, struct mds_update_record *rec)
238 time_t now = CURRENT_SECONDS;
239 struct iattr *attr = &rec->ur_iattr;
240 unsigned int ia_valid = attr->ia_valid;
244 if (ia_valid & ATTR_RAW)
245 attr->ia_valid &= ~ATTR_RAW;
247 if (!(ia_valid & ATTR_CTIME_SET))
248 LTIME_S(attr->ia_ctime) = now;
250 attr->ia_valid &= ~ATTR_CTIME_SET;
251 if (!(ia_valid & ATTR_ATIME_SET))
252 LTIME_S(attr->ia_atime) = now;
253 if (!(ia_valid & ATTR_MTIME_SET))
254 LTIME_S(attr->ia_mtime) = now;
256 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
257 RETURN((attr->ia_valid & ~ATTR_ATTR_FLAG) ? -EPERM : 0);
260 if ((ia_valid & (ATTR_MTIME|ATTR_ATIME)) == (ATTR_MTIME|ATTR_ATIME)) {
261 if (current->fsuid != inode->i_uid &&
262 (error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
266 if (ia_valid & ATTR_SIZE &&
267 /* NFSD hack for open(O_CREAT|O_TRUNC)=mknod+truncate (bug 5781) */
268 !(rec->ur_uc.luc_fsuid == inode->i_uid &&
269 ia_valid & MDS_OPEN_OWNEROVERRIDE)) {
270 if ((error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
274 if (ia_valid & (ATTR_UID | ATTR_GID)) {
277 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
279 if (attr->ia_uid == (uid_t) -1)
280 attr->ia_uid = inode->i_uid;
281 if (attr->ia_gid == (gid_t) -1)
282 attr->ia_gid = inode->i_gid;
283 if (!(ia_valid & ATTR_MODE))
284 attr->ia_mode = inode->i_mode;
286 * If the user or group of a non-directory has been
287 * changed by a non-root user, remove the setuid bit.
288 * 19981026 David C Niemi <niemi@tux.org>
290 * Changed this to apply to all users, including root,
291 * to avoid some races. This is the behavior we had in
292 * 2.0. The check for non-root was definitely wrong
293 * for 2.2 anyway, as it should have been using
294 * CAP_FSETID rather than fsuid -- 19990830 SD.
296 if ((inode->i_mode & S_ISUID) == S_ISUID &&
297 !S_ISDIR(inode->i_mode)) {
298 attr->ia_mode &= ~S_ISUID;
299 attr->ia_valid |= ATTR_MODE;
302 * Likewise, if the user or group of a non-directory
303 * has been changed by a non-root user, remove the
304 * setgid bit UNLESS there is no group execute bit
305 * (this would be a file marked for mandatory
306 * locking). 19981026 David C Niemi <niemi@tux.org>
308 * Removed the fsuid check (see the comment above) --
311 if (((inode->i_mode & (S_ISGID | S_IXGRP)) ==
312 (S_ISGID | S_IXGRP)) && !S_ISDIR(inode->i_mode)) {
313 attr->ia_mode &= ~S_ISGID;
314 attr->ia_valid |= ATTR_MODE;
316 } else if (ia_valid & ATTR_MODE) {
317 int mode = attr->ia_mode;
319 if (attr->ia_mode == (umode_t)-1)
320 mode = inode->i_mode;
322 (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
327 void mds_steal_ack_locks(struct ptlrpc_request *req)
329 struct obd_export *exp = req->rq_export;
330 struct list_head *tmp;
331 struct ptlrpc_reply_state *oldrep;
332 struct ptlrpc_service *svc;
335 /* CAVEAT EMPTOR: spinlock order */
336 spin_lock(&exp->exp_lock);
337 list_for_each (tmp, &exp->exp_outstanding_replies) {
338 oldrep = list_entry(tmp, struct ptlrpc_reply_state,rs_exp_list);
340 if (oldrep->rs_xid != req->rq_xid)
343 if (lustre_msg_get_opc(oldrep->rs_msg) !=
344 lustre_msg_get_opc(req->rq_reqmsg))
345 CERROR ("Resent req xid "LPX64" has mismatched opc: "
346 "new %d old %d\n", req->rq_xid,
347 lustre_msg_get_opc(req->rq_reqmsg),
348 lustre_msg_get_opc(oldrep->rs_msg));
350 svc = oldrep->rs_service;
351 spin_lock (&svc->srv_lock);
353 list_del_init (&oldrep->rs_exp_list);
355 CWARN("Stealing %d locks from rs %p x"LPD64".t"LPD64
357 oldrep->rs_nlocks, oldrep,
358 oldrep->rs_xid, oldrep->rs_transno,
359 lustre_msg_get_opc(oldrep->rs_msg),
360 libcfs_nid2str(exp->exp_connection->c_peer.nid));
362 for (i = 0; i < oldrep->rs_nlocks; i++)
363 ptlrpc_save_lock(req,
364 &oldrep->rs_locks[i],
365 oldrep->rs_modes[i]);
366 oldrep->rs_nlocks = 0;
368 DEBUG_REQ(D_HA, req, "stole locks for");
369 ptlrpc_schedule_difficult_reply (oldrep);
371 spin_unlock (&svc->srv_lock);
374 spin_unlock(&exp->exp_lock);
376 EXPORT_SYMBOL(mds_steal_ack_locks);
377 void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd)
379 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
380 req->rq_transno = le64_to_cpu(mcd->mcd_last_close_transno);
381 lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
382 req->rq_status = le32_to_cpu(mcd->mcd_last_close_result);
383 lustre_msg_set_status(req->rq_repmsg, req->rq_status);
385 req->rq_transno = le64_to_cpu(mcd->mcd_last_transno);
386 lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
387 req->rq_status = le32_to_cpu(mcd->mcd_last_result);
388 lustre_msg_set_status(req->rq_repmsg, req->rq_status);
390 DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
391 req->rq_transno, req->rq_status);
393 mds_steal_ack_locks(req);
396 static void reconstruct_reint_setattr(struct mds_update_record *rec,
397 int offset, struct ptlrpc_request *req)
399 struct mds_export_data *med = &req->rq_export->exp_mds_data;
400 struct mds_obd *obd = &req->rq_export->exp_obd->u.mds;
402 struct mds_body *body;
404 mds_req_from_mcd(req, med->med_mcd);
406 de = mds_fid2dentry(obd, rec->ur_fid1, NULL);
408 LASSERT(PTR_ERR(de) == req->rq_status);
412 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*body));
413 mds_pack_inode2fid(&body->fid1, de->d_inode);
414 mds_pack_inode2body(body, de->d_inode);
416 /* Don't return OST-specific attributes if we didn't just set them */
417 if (rec->ur_iattr.ia_valid & ATTR_SIZE)
418 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
419 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
420 body->valid |= OBD_MD_FLMTIME;
421 if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
422 body->valid |= OBD_MD_FLATIME;
427 int mds_osc_setattr_async(struct obd_device *obd, __u32 uid, __u32 gid,
428 struct lov_mds_md *lmm, int lmm_size,
429 struct llog_cookie *logcookies, __u64 id, __u32 gen,
432 struct mds_obd *mds = &obd->u.mds;
433 struct obd_trans_info oti = { 0 };
434 struct obd_info oinfo = { { { 0 } } };
438 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OST_SETATTR))
441 /* first get memory EA */
442 OBDO_ALLOC(oinfo.oi_oa);
448 rc = obd_unpackmd(mds->mds_osc_exp, &oinfo.oi_md, lmm, lmm_size);
450 CERROR("Error unpack md %p for inode "LPU64"\n", lmm, id);
454 rc = obd_checkmd(mds->mds_osc_exp, obd->obd_self_export, oinfo.oi_md);
456 CERROR("Error revalidate lsm %p \n", oinfo.oi_md);
461 oinfo.oi_oa->o_uid = uid;
462 oinfo.oi_oa->o_gid = gid;
463 oinfo.oi_oa->o_id = oinfo.oi_md->lsm_object_id;
464 oinfo.oi_oa->o_gr = oinfo.oi_md->lsm_object_gr;
465 oinfo.oi_oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP |
466 OBD_MD_FLUID | OBD_MD_FLGID;
468 oinfo.oi_oa->o_valid |= OBD_MD_FLCOOKIE;
469 oti.oti_logcookies = logcookies;
472 oinfo.oi_oa->o_fid = id;
473 oinfo.oi_oa->o_generation = gen;
474 oinfo.oi_oa->o_valid |= OBD_MD_FLFID | OBD_MD_FLGENER;
477 /* do async setattr from mds to ost not waiting for responses. */
478 rc = obd_setattr_async(mds->mds_osc_exp, &oinfo, &oti, NULL);
480 CDEBUG(D_INODE, "mds to ost setattr objid 0x"LPX64
481 " on ost error %d\n", oinfo.oi_md->lsm_object_id, rc);
484 obd_free_memmd(mds->mds_osc_exp, &oinfo.oi_md);
485 OBDO_FREE(oinfo.oi_oa);
488 EXPORT_SYMBOL(mds_osc_setattr_async);
490 /* In the raw-setattr case, we lock the child inode.
491 * In the write-back case or if being called from open, the client holds a lock
494 * We use the ATTR_FROM_OPEN flag to tell these cases apart. */
495 static int mds_reint_setattr(struct mds_update_record *rec, int offset,
496 struct ptlrpc_request *req,
497 struct lustre_handle *lh)
499 unsigned int ia_valid = rec->ur_iattr.ia_valid;
500 struct mds_obd *mds = mds_req2mds(req);
501 struct obd_device *obd = req->rq_export->exp_obd;
502 struct mds_body *body;
504 struct inode *inode = NULL;
505 struct lustre_handle lockh;
507 struct mds_logcancel_data *mlcd = NULL;
508 struct lov_mds_md *lmm = NULL;
509 struct llog_cookie *logcookies = NULL;
510 int lmm_size = 0, need_lock = 1, cookie_size = 0;
511 int rc = 0, cleanup_phase = 0, err, locked = 0, sync = 0;
512 unsigned int qcids[MAXQUOTAS] = { 0, 0 };
513 unsigned int qpids[MAXQUOTAS] = { rec->ur_iattr.ia_uid,
514 rec->ur_iattr.ia_gid };
517 LASSERT(offset == REQ_REC_OFF);
518 offset = REPLY_REC_OFF;
520 DEBUG_REQ(D_INODE, req, "setattr "LPU64"/%u %x", rec->ur_fid1->id,
521 rec->ur_fid1->generation, rec->ur_iattr.ia_valid);
522 OBD_COUNTER_INCREMENT(obd, setattr);
524 MDS_CHECK_RESENT(req, reconstruct_reint_setattr(rec, offset, req));
527 ldlm_request_cancel(req, rec->ur_dlm, 0);
529 if (rec->ur_iattr.ia_valid & ATTR_FROM_OPEN ||
530 (req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)) {
531 de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
533 GOTO(cleanup, rc = PTR_ERR(de));
534 if (req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
535 GOTO(cleanup, rc = -EROFS);
537 __u64 lockpart = MDS_INODELOCK_UPDATE;
538 if (rec->ur_iattr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID))
539 lockpart |= MDS_INODELOCK_LOOKUP;
541 de = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, LCK_EX,
544 GOTO(cleanup, rc = PTR_ERR(de));
552 if ((rec->ur_iattr.ia_valid & ATTR_FROM_OPEN) ||
553 (rec->ur_iattr.ia_valid & ATTR_SIZE)) {
554 /* Check write access for the O_TRUNC case */
555 if (mds_query_write_access(inode) < 0)
556 GOTO(cleanup, rc = -ETXTBSY);
559 /* save uid/gid for quota acq/rel */
560 qcids[USRQUOTA] = inode->i_uid;
561 qcids[GRPQUOTA] = inode->i_gid;
563 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
564 rec->ur_eadata != NULL) {
565 LOCK_INODE_MUTEX(inode);
569 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb);
571 /* start a log jounal handle if needed */
572 if (S_ISREG(inode->i_mode) &&
573 rec->ur_iattr.ia_valid & (ATTR_UID | ATTR_GID)) {
574 lmm_size = mds->mds_max_mdsize;
575 OBD_ALLOC(lmm, lmm_size);
577 GOTO(cleanup, rc = -ENOMEM);
580 rc = mds_get_md(obd, inode, lmm, &lmm_size, need_lock);
585 handle = fsfilt_start_log(obd, inode, FSFILT_OP_SETATTR, NULL,
586 le32_to_cpu(lmm->lmm_stripe_count));
588 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
591 GOTO(cleanup, rc = PTR_ERR(handle));
593 if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
594 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n",
595 LTIME_S(rec->ur_iattr.ia_mtime),
596 LTIME_S(rec->ur_iattr.ia_ctime));
597 rc = mds_fix_attr(inode, rec);
601 if (rec->ur_iattr.ia_valid & ATTR_ATTR_FLAG) { /* ioctl */
602 rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_SETFLAGS,
603 (long)&rec->ur_flags);
604 } else if (rec->ur_iattr.ia_valid) { /* setattr */
605 rc = fsfilt_setattr(obd, de, handle, &rec->ur_iattr, 0);
606 /* journal chown/chgrp in llog, just like unlink */
607 if (rc == 0 && lmm_size){
608 cookie_size = mds_get_cookie_size(obd, lmm);
609 OBD_ALLOC(logcookies, cookie_size);
610 if (logcookies == NULL)
611 GOTO(cleanup, rc = -ENOMEM);
613 if (mds_log_op_setattr(obd, inode->i_uid, inode->i_gid,
615 logcookies, cookie_size) <= 0) {
616 OBD_FREE(logcookies, cookie_size);
622 if (rc == 0 && (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
623 rec->ur_eadata != NULL) {
624 struct lov_stripe_md *lsm = NULL;
625 struct lov_user_md *lum = NULL;
627 rc = ll_permission(inode, MAY_WRITE, NULL);
631 lum = rec->ur_eadata;
632 /* if { size, offset, count } = { 0, -1, 0 } (i.e. all default
633 * values specified) then delete default striping from dir. */
634 if (S_ISDIR(inode->i_mode) &&
635 ((lum->lmm_stripe_size == 0 &&
636 lum->lmm_stripe_offset ==
637 (typeof(lum->lmm_stripe_offset))(-1) &&
638 lum->lmm_stripe_count == 0) ||
639 /* lmm_stripe_size == -1 is deprecated in 1.4.6 */
640 lum->lmm_stripe_size ==
641 (typeof(lum->lmm_stripe_size))(-1))){
642 rc = fsfilt_set_md(obd, inode, handle, NULL, 0, "lov");
646 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
648 &lsm, rec->ur_eadata);
652 obd_free_memmd(mds->mds_osc_exp, &lsm);
654 rc = fsfilt_set_md(obd, inode, handle, rec->ur_eadata,
655 rec->ur_eadatalen, "lov");
661 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*body));
662 mds_pack_inode2fid(&body->fid1, inode);
663 mds_pack_inode2body(body, inode);
665 /* don't return OST-specific attributes if we didn't just set them. */
666 if (ia_valid & ATTR_SIZE)
667 body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
668 if (ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
669 body->valid |= OBD_MD_FLMTIME;
670 if (ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
671 body->valid |= OBD_MD_FLATIME;
673 if (rc == 0 && rec->ur_cookielen && !IS_ERR(mds->mds_osc_obd)) {
674 OBD_ALLOC(mlcd, sizeof(*mlcd) + rec->ur_cookielen +
677 mlcd->mlcd_size = sizeof(*mlcd) + rec->ur_cookielen +
679 mlcd->mlcd_eadatalen = rec->ur_eadatalen;
680 mlcd->mlcd_cookielen = rec->ur_cookielen;
681 mlcd->mlcd_lmm = (void *)&mlcd->mlcd_cookies +
682 mlcd->mlcd_cookielen;
683 memcpy(&mlcd->mlcd_cookies, rec->ur_logcookies,
684 mlcd->mlcd_cookielen);
685 memcpy(mlcd->mlcd_lmm, rec->ur_eadata,
686 mlcd->mlcd_eadatalen);
688 CERROR("unable to allocate log cancel data\n");
694 sync = fsfilt_add_journal_cb(req->rq_export->exp_obd, 0, handle,
695 mds_cancel_cookies_cb, mlcd);
696 err = mds_finish_transno(mds, inode, handle, req, rc, 0, sync);
697 /* do mds to ost setattr if needed */
698 if (!rc && !err && lmm_size)
699 mds_osc_setattr_async(obd, inode->i_ino, inode->i_generation, lmm,
700 lmm_size, logcookies, rec->ur_fid1->id,
701 rec->ur_fid1->generation, NULL);
703 switch (cleanup_phase) {
705 OBD_FREE(lmm, mds->mds_max_mdsize);
707 OBD_FREE(logcookies, cookie_size);
709 if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
710 rec->ur_eadata != NULL)
711 UNLOCK_INODE_MUTEX(inode);
715 ldlm_lock_decref(&lockh, LCK_EX);
717 ptlrpc_save_lock (req, &lockh, LCK_EX);
730 /* trigger dqrel/dqacq for original owner and new owner */
731 if (ia_valid & (ATTR_UID | ATTR_GID))
732 lquota_adjust(mds_quota_interface_ref, obd, qcids, qpids, rc,
738 static void reconstruct_reint_create(struct mds_update_record *rec, int offset,
739 struct ptlrpc_request *req)
741 struct mds_export_data *med = &req->rq_export->exp_mds_data;
742 struct mds_obd *obd = &req->rq_export->exp_obd->u.mds;
743 struct dentry *parent, *child;
744 struct mds_body *body;
746 mds_req_from_mcd(req, med->med_mcd);
751 parent = mds_fid2dentry(obd, rec->ur_fid1, NULL);
752 LASSERT(!IS_ERR(parent));
753 child = ll_lookup_one_len(rec->ur_name, parent, rec->ur_namelen - 1);
754 LASSERT(!IS_ERR(child));
756 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*body));
757 mds_pack_inode2fid(&body->fid1, child->d_inode);
758 mds_pack_inode2body(body, child->d_inode);
764 static int mds_reint_create(struct mds_update_record *rec, int offset,
765 struct ptlrpc_request *req,
766 struct lustre_handle *lh)
768 struct dentry *dparent = NULL;
769 struct mds_obd *mds = mds_req2mds(req);
770 struct obd_device *obd = req->rq_export->exp_obd;
771 struct dentry *dchild = NULL;
772 struct inode *dir = NULL;
774 struct lustre_handle lockh;
775 int rc = 0, err, type = rec->ur_mode & S_IFMT, cleanup_phase = 0;
777 unsigned int qcids[MAXQUOTAS] = { current->fsuid, current->fsgid };
778 unsigned int qpids[MAXQUOTAS] = { 0, 0 };
779 struct lvfs_dentry_params dp = LVFS_DENTRY_PARAMS_INIT;
782 LASSERT(offset == REQ_REC_OFF);
783 offset = REPLY_REC_OFF;
785 LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name,
788 DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u name %s mode %o",
789 rec->ur_fid1->id, rec->ur_fid1->generation,
790 rec->ur_name, rec->ur_mode);
792 MDS_CHECK_RESENT(req, reconstruct_reint_create(rec, offset, req));
794 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
795 GOTO(cleanup, rc = -ESTALE);
798 ldlm_request_cancel(req, rec->ur_dlm, 0);
800 dparent = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, LCK_EX, &lockh,
801 MDS_INODELOCK_UPDATE);
802 if (IS_ERR(dparent)) {
803 rc = PTR_ERR(dparent);
805 CERROR("parent "LPU64"/%u lookup error %d\n",
806 rec->ur_fid1->id, rec->ur_fid1->generation, rc);
809 cleanup_phase = 1; /* locked parent dentry */
810 dir = dparent->d_inode;
813 ldlm_lock_dump_handle(D_OTHER, &lockh);
815 dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1);
816 if (IS_ERR(dchild)) {
817 rc = PTR_ERR(dchild);
818 if (rc != -ENAMETOOLONG)
819 CERROR("child lookup error %d\n", rc);
823 cleanup_phase = 2; /* child dentry */
825 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb);
827 if (req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY) {
829 GOTO(cleanup, rc = -EEXIST);
830 GOTO(cleanup, rc = -EROFS);
833 if (dir->i_mode & S_ISGID && S_ISDIR(rec->ur_mode))
834 rec->ur_mode |= S_ISGID;
836 dchild->d_fsdata = (void *)&dp;
837 dp.ldp_inum = (unsigned long)rec->ur_fid2->id;
842 handle = fsfilt_start(obd, dir, FSFILT_OP_CREATE, NULL);
844 GOTO(cleanup, rc = PTR_ERR(handle));
845 rc = ll_vfs_create(dir, dchild, rec->ur_mode, NULL);
846 mds_counter_incr(req->rq_export, LPROC_MDS_MKNOD);
851 handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
853 GOTO(cleanup, rc = PTR_ERR(handle));
854 rc = vfs_mkdir(dir, dchild, rec->ur_mode);
855 mds_counter_incr(req->rq_export, LPROC_MDS_MKDIR);
860 handle = fsfilt_start(obd, dir, FSFILT_OP_SYMLINK, NULL);
862 GOTO(cleanup, rc = PTR_ERR(handle));
863 if (rec->ur_tgt == NULL) /* no target supplied */
864 rc = -EINVAL; /* -EPROTO? */
866 rc = ll_vfs_symlink(dir, dchild, rec->ur_tgt, S_IALLUGO);
867 mds_counter_incr(req->rq_export, LPROC_MDS_MKNOD);
875 int rdev = rec->ur_rdev;
876 handle = fsfilt_start(obd, dir, FSFILT_OP_MKNOD, NULL);
878 GOTO(cleanup, rc = PTR_ERR(handle));
879 rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
880 mds_counter_incr(req->rq_export, LPROC_MDS_MKNOD);
885 CERROR("bad file type %o creating %s\n", type, rec->ur_name);
886 dchild->d_fsdata = NULL;
887 GOTO(cleanup, rc = -EINVAL);
890 /* In case we stored the desired inum in here, we want to clean up. */
891 if (dchild->d_fsdata == (void *)(unsigned long)rec->ur_fid2->id)
892 dchild->d_fsdata = NULL;
895 CDEBUG(D_INODE, "error during create: %d\n", rc);
899 struct inode *inode = dchild->d_inode;
900 struct mds_body *body;
903 LTIME_S(iattr.ia_atime) = rec->ur_time;
904 LTIME_S(iattr.ia_ctime) = rec->ur_time;
905 LTIME_S(iattr.ia_mtime) = rec->ur_time;
906 iattr.ia_uid = current->fsuid; /* set by push_ctxt already */
907 if (dir->i_mode & S_ISGID)
908 iattr.ia_gid = dir->i_gid;
910 iattr.ia_gid = current->fsgid;
911 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
912 ATTR_MTIME | ATTR_CTIME;
914 if (rec->ur_fid2->id) {
915 LASSERT(rec->ur_fid2->id == inode->i_ino);
916 inode->i_generation = rec->ur_fid2->generation;
917 /* Dirtied and committed by the upcoming setattr. */
918 CDEBUG(D_INODE, "recreated ino %lu with gen %u\n",
919 inode->i_ino, inode->i_generation);
921 CDEBUG(D_INODE, "created ino %lu with gen %x\n",
922 inode->i_ino, inode->i_generation);
925 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
927 CERROR("error on child setattr: rc = %d\n", rc);
929 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
930 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
932 CERROR("error on parent setattr: rc = %d\n", rc);
934 if (S_ISDIR(inode->i_mode)) {
935 struct lov_mds_md lmm;
936 int lmm_size = sizeof(lmm);
937 rc = mds_get_md(obd, dir, &lmm, &lmm_size, 1);
939 LOCK_INODE_MUTEX(inode);
940 rc = fsfilt_set_md(obd, inode, handle,
941 &lmm, lmm_size, "lov");
942 UNLOCK_INODE_MUTEX(inode);
945 CERROR("error on copy stripe info: rc = %d\n",
949 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*body));
950 mds_pack_inode2fid(&body->fid1, inode);
951 mds_pack_inode2body(body, inode);
956 err = mds_finish_transno(mds, dir, handle, req, rc, 0, 0);
959 /* Destroy the file we just created. This should not need
960 * extra journal credits, as we have already modified all of
961 * the blocks needed in order to create the file in the first
966 err = vfs_rmdir(dir, dchild);
968 CERROR("rmdir in error path: %d\n", err);
971 err = vfs_unlink(dir, dchild);
973 CERROR("unlink in error path: %d\n", err);
976 } else if (created) {
977 /* The inode we were allocated may have just been freed
978 * by an unlink operation. We take this lock to
979 * synchronize against the matching reply-ack-lock taken
980 * in unlink, to avoid replay problems if this reply
981 * makes it out to the client but the unlink's does not.
982 * See bug 2029 for more detail.*/
983 mds_lock_new_child(obd, dchild->d_inode, NULL);
984 /* save uid/gid of create inode and parent */
985 qpids[USRQUOTA] = dir->i_uid;
986 qpids[GRPQUOTA] = dir->i_gid;
991 switch (cleanup_phase) {
992 case 2: /* child dentry */
994 case 1: /* locked parent dentry */
996 ldlm_lock_decref(&lockh, LCK_EX);
998 ptlrpc_save_lock (req, &lockh, LCK_EX);
1004 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1007 req->rq_status = rc;
1009 /* trigger dqacq on the owner of child and parent */
1010 lquota_adjust(mds_quota_interface_ref, obd, qcids, qpids, rc,
1015 int res_gt(const struct ldlm_res_id *res1, const struct ldlm_res_id *res2,
1016 ldlm_policy_data_t *p1, ldlm_policy_data_t *p2)
1020 for (i = 0; i < RES_NAME_SIZE; i++) {
1021 /* return 1 here, because enqueue_ordered will skip resources
1022 * of all zeroes if they're sorted to the end of the list. */
1023 if (res1->name[i] == 0 && res2->name[i] != 0)
1025 if (res2->name[i] == 0 && res1->name[i] != 0)
1028 if (res1->name[i] > res2->name[i])
1030 if (res1->name[i] < res2->name[i])
1035 if (memcmp(p1, p2, sizeof(*p1)) < 0)
1040 /* This function doesn't use ldlm_match_or_enqueue because we're always called
1041 * with EX or PW locks, and the MDS is no longer allowed to match write locks,
1042 * because they take the place of local semaphores.
1044 * One or two locks are taken in numerical order. A res_id->name[0] of 0 means
1045 * no lock is taken for that res_id. Must be at least one non-zero res_id. */
1046 int enqueue_ordered_locks(struct obd_device *obd,
1047 const struct ldlm_res_id *p1_res_id,
1048 struct lustre_handle *p1_lockh, int p1_lock_mode,
1049 ldlm_policy_data_t *p1_policy,
1050 const struct ldlm_res_id *p2_res_id,
1051 struct lustre_handle *p2_lockh, int p2_lock_mode,
1052 ldlm_policy_data_t *p2_policy)
1054 const struct ldlm_res_id *res_id[2] = { p1_res_id, p2_res_id };
1055 struct lustre_handle *handles[2] = { p1_lockh, p2_lockh };
1056 int lock_modes[2] = { p1_lock_mode, p2_lock_mode };
1057 ldlm_policy_data_t *policies[2] = {p1_policy, p2_policy};
1061 LASSERT(p1_res_id != NULL && p2_res_id != NULL);
1063 CDEBUG(D_INFO, "locks before: "LPU64"/"LPU64"\n",
1064 res_id[0]->name[0], res_id[1]->name[0]);
1066 if (res_gt(p1_res_id, p2_res_id, p1_policy, p2_policy)) {
1067 handles[1] = p1_lockh;
1068 handles[0] = p2_lockh;
1069 res_id[1] = p1_res_id;
1070 res_id[0] = p2_res_id;
1071 lock_modes[1] = p1_lock_mode;
1072 lock_modes[0] = p2_lock_mode;
1073 policies[1] = p1_policy;
1074 policies[0] = p2_policy;
1077 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"\n",
1078 res_id[0]->name[0], res_id[1]->name[0]);
1080 flags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB;
1081 rc = ldlm_cli_enqueue_local(obd->obd_namespace, res_id[0],
1082 LDLM_IBITS, policies[0], lock_modes[0],
1083 &flags, ldlm_blocking_ast,
1084 ldlm_completion_ast, NULL, NULL, 0,
1088 ldlm_lock_dump_handle(D_OTHER, handles[0]);
1090 if (memcmp(res_id[0], res_id[1], sizeof(*res_id[0])) == 0 &&
1091 (policies[0]->l_inodebits.bits & policies[1]->l_inodebits.bits)) {
1092 memcpy(handles[1], handles[0], sizeof(*(handles[1])));
1093 ldlm_lock_addref(handles[1], lock_modes[1]);
1094 } else if (res_id[1]->name[0] != 0) {
1095 flags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB;
1096 rc = ldlm_cli_enqueue_local(obd->obd_namespace, res_id[1],
1097 LDLM_IBITS, policies[1],
1098 lock_modes[1], &flags,
1100 ldlm_completion_ast, NULL, NULL,
1101 0, NULL, handles[1]);
1102 if (rc != ELDLM_OK) {
1103 ldlm_lock_decref(handles[0], lock_modes[0]);
1106 ldlm_lock_dump_handle(D_OTHER, handles[1]);
1112 static inline int res_eq(const struct ldlm_res_id *res1,
1113 const struct ldlm_res_id *res2)
1115 return !memcmp(res1, res2, sizeof(*res1));
1119 try_to_aggregate_locks(const struct ldlm_res_id *res1, ldlm_policy_data_t *p1,
1120 const struct ldlm_res_id *res2, ldlm_policy_data_t *p2)
1122 if (!res_eq(res1, res2))
1124 /* XXX: any additional inodebits (to current LOOKUP and UPDATE)
1125 * should be taken with great care here */
1126 p1->l_inodebits.bits |= p2->l_inodebits.bits;
1129 int enqueue_4ordered_locks(struct obd_device *obd,
1130 const struct ldlm_res_id *p1_res_id,
1131 struct lustre_handle *p1_lockh, int p1_lock_mode,
1132 ldlm_policy_data_t *p1_policy,
1133 const struct ldlm_res_id *p2_res_id,
1134 struct lustre_handle *p2_lockh, int p2_lock_mode,
1135 ldlm_policy_data_t *p2_policy,
1136 const struct ldlm_res_id *c1_res_id,
1137 struct lustre_handle *c1_lockh, int c1_lock_mode,
1138 ldlm_policy_data_t *c1_policy,
1139 const struct ldlm_res_id *c2_res_id,
1140 struct lustre_handle *c2_lockh, int c2_lock_mode,
1141 ldlm_policy_data_t *c2_policy)
1143 const struct ldlm_res_id *res_id[5] = { p1_res_id, p2_res_id,
1144 c1_res_id, c2_res_id };
1145 struct lustre_handle *dlm_handles[5] = { p1_lockh, p2_lockh,
1146 c1_lockh, c2_lockh };
1147 int lock_modes[5] = { p1_lock_mode, p2_lock_mode,
1148 c1_lock_mode, c2_lock_mode };
1149 ldlm_policy_data_t *policies[5] = {p1_policy, p2_policy,
1150 c1_policy, c2_policy};
1151 int rc, i, j, sorted, flags;
1154 CDEBUG(D_DLMTRACE, "locks before: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1155 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1156 res_id[3]->name[0]);
1158 /* simple insertion sort - we have at most 4 elements */
1159 for (i = 1; i < 4; i++) {
1161 dlm_handles[4] = dlm_handles[i];
1162 res_id[4] = res_id[i];
1163 lock_modes[4] = lock_modes[i];
1164 policies[4] = policies[i];
1168 if (res_gt(res_id[j], res_id[4], policies[j],
1170 dlm_handles[j + 1] = dlm_handles[j];
1171 res_id[j + 1] = res_id[j];
1172 lock_modes[j + 1] = lock_modes[j];
1173 policies[j + 1] = policies[j];
1178 } while (j >= 0 && !sorted);
1180 dlm_handles[j + 1] = dlm_handles[4];
1181 res_id[j + 1] = res_id[4];
1182 lock_modes[j + 1] = lock_modes[4];
1183 policies[j + 1] = policies[4];
1186 CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
1187 res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
1188 res_id[3]->name[0]);
1190 /* XXX we could send ASTs on all these locks first before blocking? */
1191 for (i = 0; i < 4; i++) {
1192 flags = LDLM_FL_ATOMIC_CB;
1193 if (res_id[i]->name[0] == 0)
1195 if (i && res_eq(res_id[i], res_id[i-1])) {
1196 memcpy(dlm_handles[i], dlm_handles[i-1],
1197 sizeof(*(dlm_handles[i])));
1198 ldlm_lock_addref(dlm_handles[i], lock_modes[i]);
1200 /* we need to enqueue locks with different inodebits
1201 * at once, because otherwise concurrent thread can
1202 * hit the windown between these two locks and we'll
1203 * get to deadlock. see bug 10360. note also, that it
1204 * is impossible to have >2 equal res. */
1206 try_to_aggregate_locks(res_id[i], policies[i],
1207 res_id[i+1], policies[i+1]);
1208 rc = ldlm_cli_enqueue_local(obd->obd_namespace,
1209 res_id[i], LDLM_IBITS,
1210 policies[i], lock_modes[i],
1211 &flags, ldlm_blocking_ast,
1212 ldlm_completion_ast, NULL,
1216 GOTO(out_err, rc = -EIO);
1217 ldlm_lock_dump_handle(D_OTHER, dlm_handles[i]);
1224 ldlm_lock_decref(dlm_handles[i], lock_modes[i]);
1229 /* In the unlikely case that the child changed while we were waiting
1230 * on the lock, we need to drop the lock on the old child and either:
1231 * - if the child has a lower resource name, then we have to also
1232 * drop the parent lock and regain the locks in the right order
1233 * - in the rename case, if the child has a lower resource name than one of
1234 * the other parent/child resources (maxres) we also need to reget the locks
1235 * - if the child has a higher resource name (this is the common case)
1236 * we can just get the lock on the new child (still in lock order)
1238 * Returns 0 if the child did not change or if it changed but could be locked.
1239 * Returns 1 if the child changed and we need to re-lock (no locks held).
1240 * Returns -ve error with a valid dchild (no locks held). */
1241 static int mds_verify_child(struct obd_device *obd,
1242 const struct ldlm_res_id *parent_res_id,
1243 struct lustre_handle *parent_lockh,
1244 struct dentry *dparent, int parent_mode,
1245 struct ldlm_res_id *child_res_id,
1246 struct lustre_handle *child_lockh,
1247 struct dentry **dchildp, int child_mode,
1248 ldlm_policy_data_t *child_policy,
1249 const char *name, int namelen,
1250 const struct ldlm_res_id *maxres)
1252 struct dentry *vchild, *dchild = *dchildp;
1253 int rc = 0, cleanup_phase = 2; /* parent, child locks */
1256 vchild = ll_lookup_one_len(name, dparent, namelen - 1);
1258 GOTO(cleanup, rc = PTR_ERR(vchild));
1260 if (likely((vchild->d_inode == NULL && child_res_id->name[0] == 0) ||
1261 (vchild->d_inode != NULL &&
1262 child_res_id->name[0] == vchild->d_inode->i_ino &&
1263 child_res_id->name[1] == vchild->d_inode->i_generation))) {
1271 CDEBUG(D_DLMTRACE, "child inode changed: %p != %p (%lu != "LPU64")\n",
1272 vchild->d_inode, dchild ? dchild->d_inode : 0,
1273 vchild->d_inode ? vchild->d_inode->i_ino : 0,
1274 child_res_id->name[0]);
1275 if (child_res_id->name[0] != 0)
1276 ldlm_lock_decref(child_lockh, child_mode);
1280 cleanup_phase = 1; /* parent lock only */
1281 *dchildp = dchild = vchild;
1283 if (dchild->d_inode) {
1284 int flags = LDLM_FL_ATOMIC_CB;
1285 child_res_id->name[0] = dchild->d_inode->i_ino;
1286 child_res_id->name[1] = dchild->d_inode->i_generation;
1288 /* Make sure that we don't try to re-enqueue a lock on the
1289 * same resource if it happens that the source is renamed to
1290 * the target by another thread (bug 9974, thanks racer :-) */
1291 if (!res_gt(child_res_id, parent_res_id, NULL, NULL) ||
1292 !res_gt(child_res_id, maxres, NULL, NULL)) {
1293 CDEBUG(D_DLMTRACE, "relock "LPU64"<("LPU64"|"LPU64")\n",
1294 child_res_id->name[0], parent_res_id->name[0],
1296 GOTO(cleanup, rc = 1);
1299 rc = ldlm_cli_enqueue_local(obd->obd_namespace, child_res_id,
1300 LDLM_IBITS, child_policy,
1303 ldlm_completion_ast, NULL,
1304 NULL, 0, NULL, child_lockh);
1306 GOTO(cleanup, rc = -EIO);
1308 memset(child_res_id, 0, sizeof(*child_res_id));
1314 switch(cleanup_phase) {
1316 if (child_res_id->name[0] != 0)
1317 ldlm_lock_decref(child_lockh, child_mode);
1319 ldlm_lock_decref(parent_lockh, parent_mode);
1325 #define INODE_CTIME_AGE (10)
1326 #define INODE_CTIME_OLD(inode) (LTIME_S(inode->i_ctime) + \
1327 INODE_CTIME_AGE < CURRENT_SECONDS)
1329 int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds,
1331 struct lustre_handle *parent_lockh,
1332 struct dentry **dparentp, int parent_mode,
1333 __u64 parent_lockpart,
1334 char *name, int namelen,
1335 struct lustre_handle *child_lockh,
1336 struct dentry **dchildp, int child_mode,
1337 __u64 child_lockpart)
1339 struct ldlm_res_id child_res_id = { .name = {0} };
1340 struct ldlm_res_id parent_res_id = { .name = {0} };
1341 ldlm_policy_data_t parent_policy = {.l_inodebits = { parent_lockpart }};
1342 ldlm_policy_data_t child_policy = {.l_inodebits = { child_lockpart }};
1343 struct inode *inode;
1344 int rc = 0, cleanup_phase = 0;
1347 /* Step 1: Lookup parent */
1348 *dparentp = mds_fid2dentry(mds, fid, NULL);
1349 if (IS_ERR(*dparentp)) {
1350 rc = PTR_ERR(*dparentp);
1355 CDEBUG(D_INODE, "parent ino %lu, name %s\n",
1356 (*dparentp)->d_inode->i_ino, name);
1358 parent_res_id.name[0] = (*dparentp)->d_inode->i_ino;
1359 parent_res_id.name[1] = (*dparentp)->d_inode->i_generation;
1361 cleanup_phase = 1; /* parent dentry */
1363 /* Step 2: Lookup child (without DLM lock, to get resource name) */
1364 *dchildp = ll_lookup_one_len(name, *dparentp, namelen - 1);
1365 if (IS_ERR(*dchildp)) {
1366 rc = PTR_ERR(*dchildp);
1367 CDEBUG(D_INODE, "child lookup error %d\n", rc);
1371 cleanup_phase = 2; /* child dentry */
1372 inode = (*dchildp)->d_inode;
1373 if (inode != NULL) {
1374 if (is_bad_inode(inode)) {
1375 CERROR("bad inode returned %lu/%u\n",
1376 inode->i_ino, inode->i_generation);
1377 GOTO(cleanup, rc = -ENOENT);
1379 inode = igrab(inode);
1384 child_res_id.name[0] = inode->i_ino;
1385 child_res_id.name[1] = inode->i_generation;
1387 /* If we want a LCK_CR for a directory, and this directory has not been
1388 changed for some time, we return not only a LOOKUP lock, but also an
1389 UPDATE lock to have negative dentry starts working for this dir.
1390 Also we apply same logic to non-directories. If the file is rarely
1391 changed - we return both locks and this might save us RPC on
1393 if ((child_mode & (LCK_CR|LCK_PR|LCK_CW)) && INODE_CTIME_OLD(inode))
1394 child_policy.l_inodebits.bits |= MDS_INODELOCK_UPDATE;
1399 cleanup_phase = 2; /* child dentry */
1401 /* Step 3: Lock parent and child in resource order. If child doesn't
1402 * exist, we still have to lock the parent and re-lookup. */
1403 rc = enqueue_ordered_locks(obd,&parent_res_id,parent_lockh,parent_mode,
1405 &child_res_id, child_lockh, child_mode,
1410 if (!(*dchildp)->d_inode)
1411 cleanup_phase = 3; /* parent lock */
1413 cleanup_phase = 4; /* child lock */
1415 /* Step 4: Re-lookup child to verify it hasn't changed since locking */
1416 rc = mds_verify_child(obd, &parent_res_id, parent_lockh, *dparentp,
1417 parent_mode, &child_res_id, child_lockh, dchildp,
1418 child_mode,&child_policy, name, namelen, &parent_res_id);
1428 switch (cleanup_phase) {
1430 ldlm_lock_decref(child_lockh, child_mode);
1432 ldlm_lock_decref(parent_lockh, parent_mode);
1443 void mds_reconstruct_generic(struct ptlrpc_request *req)
1445 struct mds_export_data *med = &req->rq_export->exp_mds_data;
1447 mds_req_from_mcd(req, med->med_mcd);
1450 /* If we are unlinking an open file/dir (i.e. creating an orphan) then
1451 * we instead link the inode into the PENDING directory until it is
1452 * finally released. We can't simply call mds_reint_rename() or some
1453 * part thereof, because we don't have the inode to check for link
1454 * count/open status until after it is locked.
1456 * For lock ordering, caller must get child->i_mutex first, then
1457 * pending->i_mutex before starting journal transaction.
1459 * returns 1 on success
1460 * returns 0 if we lost a race and didn't make a new link
1461 * returns negative on error
1463 static int mds_orphan_add_link(struct mds_update_record *rec,
1464 struct obd_device *obd, struct dentry *dentry)
1466 struct mds_obd *mds = &obd->u.mds;
1467 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1468 struct inode *inode = dentry->d_inode;
1469 struct dentry *pending_child;
1470 char fidname[LL_FID_NAMELEN];
1471 int fidlen = 0, rc, mode;
1474 LASSERT(inode != NULL);
1475 LASSERT(!mds_inode_is_orphan(inode));
1476 #ifndef HAVE_I_ALLOC_SEM
1477 LASSERT(TRYLOCK_INODE_MUTEX(inode) == 0);
1479 LASSERT(TRYLOCK_INODE_MUTEX(pending_dir) == 0);
1481 fidlen = ll_fid2str(fidname, inode->i_ino, inode->i_generation);
1483 CDEBUG(D_INODE, "pending destroy of %dx open %d linked %s %s = %s\n",
1484 mds_orphan_open_count(inode), inode->i_nlink,
1485 S_ISDIR(inode->i_mode) ? "dir" :
1486 S_ISREG(inode->i_mode) ? "file" : "other",rec->ur_name,fidname);
1488 if (mds_orphan_open_count(inode) == 0 || inode->i_nlink != 0)
1491 pending_child = lookup_one_len(fidname, mds->mds_pending_dir, fidlen);
1492 if (IS_ERR(pending_child))
1493 RETURN(PTR_ERR(pending_child));
1495 if (pending_child->d_inode != NULL) {
1496 CERROR("re-destroying orphan file %s?\n", rec->ur_name);
1497 LASSERT(pending_child->d_inode == inode);
1498 GOTO(out_dput, rc = 0);
1501 /* link() is semanticaly-wrong for S_IFDIR, so we set S_IFREG
1502 * for linking and return real mode back then -bzzz */
1503 mode = inode->i_mode;
1504 inode->i_mode = S_IFREG;
1505 rc = vfs_link(dentry, pending_dir, pending_child);
1507 CERROR("error linking orphan %s to PENDING: rc = %d\n",
1510 mds_inode_set_orphan(inode);
1512 /* return mode and correct i_nlink if inode is directory */
1513 inode->i_mode = mode;
1514 LASSERTF(inode->i_nlink == 1, "%s nlink == %d\n",
1515 S_ISDIR(mode) ? "dir" : S_ISREG(mode) ? "file" : "other",
1517 if (S_ISDIR(mode)) {
1519 pending_dir->i_nlink++;
1520 mark_inode_dirty(inode);
1521 mark_inode_dirty(pending_dir);
1524 GOTO(out_dput, rc = 1);
1526 l_dput(pending_child);
1530 int mds_get_cookie_size(struct obd_device *obd, struct lov_mds_md *lmm)
1532 int count = le32_to_cpu(lmm->lmm_stripe_count);
1533 int real_csize = count * sizeof(struct llog_cookie);
1537 void mds_shrink_reply(struct obd_device *obd, struct ptlrpc_request *req,
1538 struct mds_body *body, int md_off)
1540 int cookie_size = 0, md_size = 0;
1542 if (body && body->valid & OBD_MD_FLEASIZE) {
1543 md_size = body->eadatasize;
1545 if (body && body->valid & OBD_MD_FLCOOKIE) {
1546 LASSERT(body->valid & OBD_MD_FLEASIZE);
1547 cookie_size = mds_get_cookie_size(obd, lustre_msg_buf(
1548 req->rq_repmsg, md_off, 0));
1551 CDEBUG(D_INFO, "Shrink to md_size %d cookie_size %d \n", md_size,
1554 lustre_shrink_reply(req, md_off, md_size, 1);
1556 lustre_shrink_reply(req, md_off + (md_size > 0), cookie_size, 0);
1559 static int mds_reint_unlink(struct mds_update_record *rec, int offset,
1560 struct ptlrpc_request *req,
1561 struct lustre_handle *lh)
1563 struct dentry *dparent = NULL, *dchild;
1564 struct mds_obd *mds = mds_req2mds(req);
1565 struct obd_device *obd = req->rq_export->exp_obd;
1566 struct mds_body *body = NULL;
1567 struct inode *child_inode = NULL;
1568 struct lustre_handle parent_lockh, child_lockh, child_reuse_lockh;
1569 void *handle = NULL;
1570 int rc = 0, cleanup_phase = 0;
1571 unsigned int qcids[MAXQUOTAS] = { 0, 0 };
1572 unsigned int qpids[MAXQUOTAS] = { 0, 0 };
1575 LASSERT(offset == REQ_REC_OFF); /* || offset == DLM_INTENT_REC_OFF); */
1576 offset = REPLY_REC_OFF;
1578 DEBUG_REQ(D_INODE, req, "parent ino "LPU64"/%u, child %s",
1579 rec->ur_fid1->id, rec->ur_fid1->generation, rec->ur_name);
1581 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1583 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
1584 GOTO(cleanup, rc = -ENOENT);
1587 ldlm_request_cancel(req, rec->ur_dlm, 0);
1589 rc = mds_get_parent_child_locked(obd, mds, rec->ur_fid1,
1590 &parent_lockh, &dparent, LCK_EX,
1591 MDS_INODELOCK_UPDATE,
1592 rec->ur_name, rec->ur_namelen,
1593 &child_lockh, &dchild, LCK_EX,
1594 MDS_INODELOCK_FULL);
1598 cleanup_phase = 1; /* dchild, dparent, locks */
1601 child_inode = dchild->d_inode;
1602 if (child_inode == NULL) {
1603 CDEBUG(D_INODE, "child doesn't exist (dir %lu, name %s)\n",
1604 dparent->d_inode->i_ino, rec->ur_name);
1605 GOTO(cleanup, rc = -ENOENT);
1608 /* save uid/gid for quota acquire/release */
1609 qcids[USRQUOTA] = child_inode->i_uid;
1610 qcids[GRPQUOTA] = child_inode->i_gid;
1611 qpids[USRQUOTA] = dparent->d_inode->i_uid;
1612 qpids[GRPQUOTA] = dparent->d_inode->i_gid;
1614 cleanup_phase = 2; /* dchild has a lock */
1616 /* We have to do these checks ourselves, in case we are making an
1617 * orphan. The client tells us whether rmdir() or unlink() was called,
1618 * so we need to return appropriate errors (bug 72). */
1619 if ((rec->ur_mode & S_IFMT) == S_IFDIR) {
1620 if (!S_ISDIR(child_inode->i_mode))
1621 GOTO(cleanup, rc = -ENOTDIR);
1623 if (S_ISDIR(child_inode->i_mode))
1624 GOTO(cleanup, rc = -EISDIR);
1627 /* Check for EROFS after we check ENODENT, ENOTDIR, and EISDIR */
1628 if (req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
1629 GOTO(cleanup, rc = -EROFS);
1631 /* Step 3: Get a lock on the ino to sync with creation WRT inode
1632 * reuse (see bug 2029). */
1633 rc = mds_lock_new_child(obd, child_inode, &child_reuse_lockh);
1637 cleanup_phase = 3; /* child inum lock */
1639 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dparent->d_inode->i_sb);
1641 /* ldlm_reply in buf[0] if called via intent */
1642 if (offset == DLM_INTENT_REC_OFF)
1643 offset = DLM_REPLY_REC_OFF;
1645 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*body));
1646 LASSERT(body != NULL);
1648 /* child orphan sem protects orphan_dec_test && is_orphan race */
1649 MDS_DOWN_READ_ORPHAN_SEM(child_inode);
1650 cleanup_phase = 4; /* MDS_UP_READ_ORPHAN_SEM(new_inode) when finished */
1652 /* If this is potentially the last reference to this inode, get the
1653 * OBD EA data first so the client can destroy OST objects. We
1654 * only do the object removal later if no open files/links remain. */
1655 if ((S_ISDIR(child_inode->i_mode) && child_inode->i_nlink == 2) ||
1656 child_inode->i_nlink == 1) {
1657 if (mds_orphan_open_count(child_inode) > 0) {
1658 /* need to lock pending_dir before transaction */
1659 LOCK_INODE_MUTEX(mds->mds_pending_dir->d_inode);
1660 cleanup_phase = 5; /* UNLOCK_INODE_MUTEX(mds->mds_pending_dir->d_inode); */
1661 } else if (S_ISREG(child_inode->i_mode)) {
1662 mds_pack_inode2fid(&body->fid1, child_inode);
1663 mds_pack_inode2body(body, child_inode);
1664 mds_pack_md(obd, req->rq_repmsg, offset + 1, body,
1665 child_inode, MDS_PACK_MD_LOCK);
1669 /* Step 4: Do the unlink: we already verified ur_mode above (bug 72) */
1670 switch (child_inode->i_mode & S_IFMT) {
1672 /* Drop any lingering child directories before we start our
1673 * transaction, to avoid doing multiple inode dirty/delete
1674 * in our compound transaction (bug 1321). */
1675 shrink_dcache_parent(dchild);
1676 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
1679 GOTO(cleanup, rc = PTR_ERR(handle));
1680 rc = vfs_rmdir(dparent->d_inode, dchild);
1681 mds_counter_incr(req->rq_export, LPROC_MDS_RMDIR);
1684 struct lov_mds_md *lmm = lustre_msg_buf(req->rq_repmsg,
1686 handle = fsfilt_start_log(obd, dparent->d_inode,
1687 FSFILT_OP_UNLINK, NULL,
1688 le32_to_cpu(lmm->lmm_stripe_count));
1690 GOTO(cleanup, rc = PTR_ERR(handle));
1691 rc = vfs_unlink(dparent->d_inode, dchild);
1692 mds_counter_incr(req->rq_export, LPROC_MDS_UNLINK);
1700 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK,
1703 GOTO(cleanup, rc = PTR_ERR(handle));
1704 rc = vfs_unlink(dparent->d_inode, dchild);
1705 mds_counter_incr(req->rq_export, LPROC_MDS_UNLINK);
1708 CERROR("bad file type %o unlinking %s\n", rec->ur_mode,
1711 GOTO(cleanup, rc = -EINVAL);
1714 if (rc == 0 && child_inode->i_nlink == 0) {
1715 if (mds_orphan_open_count(child_inode) > 0)
1716 rc = mds_orphan_add_link(rec, obd, dchild);
1719 GOTO(cleanup, rc = 0);
1721 if (!S_ISREG(child_inode->i_mode))
1724 if (!(body->valid & OBD_MD_FLEASIZE)) {
1725 body->valid |=(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
1726 OBD_MD_FLATIME | OBD_MD_FLMTIME);
1727 } else if (mds_log_op_unlink(obd,
1728 lustre_msg_buf(req->rq_repmsg, offset + 1, 0),
1729 lustre_msg_buflen(req->rq_repmsg, offset + 1),
1730 lustre_msg_buf(req->rq_repmsg, offset + 2, 0),
1731 lustre_msg_buflen(req->rq_repmsg, offset+2)) >
1733 body->valid |= OBD_MD_FLCOOKIE;
1743 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
1744 LTIME_S(iattr.ia_mtime) = rec->ur_time;
1745 LTIME_S(iattr.ia_ctime) = rec->ur_time;
1747 err = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
1749 CERROR("error on parent setattr: rc = %d\n", err);
1752 rc = mds_finish_transno(mds, dparent ? dparent->d_inode : NULL,
1753 handle, req, rc, 0, 0);
1755 (void)obd_set_info_async(mds->mds_osc_exp, strlen("unlinked"),
1756 "unlinked", 0, NULL, NULL);
1757 switch(cleanup_phase) {
1758 case 5: /* pending_dir semaphore */
1759 UNLOCK_INODE_MUTEX(mds->mds_pending_dir->d_inode);
1760 case 4: /* child inode semaphore */
1761 MDS_UP_READ_ORPHAN_SEM(child_inode);
1762 case 3: /* child ino-reuse lock */
1763 if (rc && body != NULL) {
1764 // Don't unlink the OST objects if the MDS unlink failed
1768 ldlm_lock_decref(&child_reuse_lockh, LCK_EX);
1770 ptlrpc_save_lock(req, &child_reuse_lockh, LCK_EX);
1771 case 2: /* child lock */
1772 ldlm_lock_decref(&child_lockh, LCK_EX);
1773 case 1: /* child and parent dentry, parent lock */
1775 ldlm_lock_decref(&parent_lockh, LCK_EX);
1777 ptlrpc_save_lock(req, &parent_lockh, LCK_EX);
1784 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1787 req->rq_status = rc;
1789 mds_shrink_reply(obd, req, body, REPLY_REC_OFF + 1);
1791 /* trigger dqrel on the owner of child and parent */
1792 lquota_adjust(mds_quota_interface_ref, obd, qcids, qpids, rc, FSFILT_OP_UNLINK);
1796 static int mds_reint_link(struct mds_update_record *rec, int offset,
1797 struct ptlrpc_request *req,
1798 struct lustre_handle *lh)
1800 struct obd_device *obd = req->rq_export->exp_obd;
1801 struct dentry *de_src = NULL;
1802 struct dentry *de_tgt_dir = NULL;
1803 struct dentry *dchild = NULL;
1804 struct mds_obd *mds = mds_req2mds(req);
1805 struct lustre_handle *handle = NULL, tgt_dir_lockh, src_lockh;
1806 struct ldlm_res_id src_res_id = { .name = {0} };
1807 struct ldlm_res_id tgt_dir_res_id = { .name = {0} };
1808 ldlm_policy_data_t src_policy ={.l_inodebits = {MDS_INODELOCK_UPDATE}};
1809 ldlm_policy_data_t tgt_dir_policy =
1810 {.l_inodebits = {MDS_INODELOCK_UPDATE}};
1811 int rc = 0, cleanup_phase = 0;
1814 LASSERT(offset == REQ_REC_OFF);
1816 DEBUG_REQ(D_INODE, req, "original "LPU64"/%u to "LPU64"/%u %s",
1817 rec->ur_fid1->id, rec->ur_fid1->generation,
1818 rec->ur_fid2->id, rec->ur_fid2->generation, rec->ur_name);
1819 mds_counter_incr(req->rq_export, LPROC_MDS_LINK);
1821 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1823 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
1824 GOTO(cleanup, rc = -ENOENT);
1827 ldlm_request_cancel(req, rec->ur_dlm, 0);
1829 /* Step 1: Lookup the source inode and target directory by FID */
1830 de_src = mds_fid2dentry(mds, rec->ur_fid1, NULL);
1832 GOTO(cleanup, rc = PTR_ERR(de_src));
1834 cleanup_phase = 1; /* source dentry */
1836 de_tgt_dir = mds_fid2dentry(mds, rec->ur_fid2, NULL);
1837 if (IS_ERR(de_tgt_dir)) {
1838 rc = PTR_ERR(de_tgt_dir);
1843 cleanup_phase = 2; /* target directory dentry */
1845 CDEBUG(D_INODE, "linking %.*s/%s to inode %lu\n",
1846 de_tgt_dir->d_name.len, de_tgt_dir->d_name.name, rec->ur_name,
1847 de_src->d_inode->i_ino);
1849 /* Step 2: Take the two locks */
1850 src_res_id.name[0] = de_src->d_inode->i_ino;
1851 src_res_id.name[1] = de_src->d_inode->i_generation;
1852 tgt_dir_res_id.name[0] = de_tgt_dir->d_inode->i_ino;
1853 tgt_dir_res_id.name[1] = de_tgt_dir->d_inode->i_generation;
1855 rc = enqueue_ordered_locks(obd, &src_res_id, &src_lockh, LCK_EX,
1857 &tgt_dir_res_id, &tgt_dir_lockh, LCK_EX,
1862 cleanup_phase = 3; /* locks */
1864 if (mds_inode_is_orphan(de_src->d_inode)) {
1865 CDEBUG(D_INODE, "an attempt to link an orphan inode %lu/%u\n",
1866 de_src->d_inode->i_ino,
1867 de_src->d_inode->i_generation);
1868 GOTO(cleanup, rc = -ENOENT);
1871 /* Step 3: Lookup the child */
1872 dchild = ll_lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen-1);
1873 if (IS_ERR(dchild)) {
1874 rc = PTR_ERR(dchild);
1875 if (rc != -EPERM && rc != -EACCES && rc != -ENAMETOOLONG)
1876 CERROR("child lookup error %d\n", rc);
1880 cleanup_phase = 4; /* child dentry */
1882 if (dchild->d_inode) {
1883 CDEBUG(D_INODE, "child exists (dir %lu, name %s)\n",
1884 de_tgt_dir->d_inode->i_ino, rec->ur_name);
1889 /* Step 4: Do it. */
1890 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
1892 if (req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
1893 GOTO(cleanup, rc = -EROFS);
1895 handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
1897 GOTO(cleanup, rc = PTR_ERR(handle));
1899 rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
1900 if (rc && rc != -EPERM && rc != -EACCES)
1901 CERROR("vfs_link error %d\n", rc);
1903 rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
1904 handle, req, rc, 0, 0);
1907 switch (cleanup_phase) {
1908 case 4: /* child dentry */
1912 ldlm_lock_decref(&src_lockh, LCK_EX);
1913 ldlm_lock_decref(&tgt_dir_lockh, LCK_EX);
1915 ptlrpc_save_lock(req, &src_lockh, LCK_EX);
1916 ptlrpc_save_lock(req, &tgt_dir_lockh, LCK_EX);
1918 case 2: /* target dentry */
1920 case 1: /* source dentry */
1925 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
1928 req->rq_status = rc;
1932 /* The idea here is that we need to get four locks in the end:
1933 * one on each parent directory, one on each child. We need to take
1934 * these locks in some kind of order (to avoid deadlocks), and the order
1935 * I selected is "increasing resource number" order. We need to look up
1936 * the children, however, before we know what the resource number(s) are.
1937 * Thus the following plan:
1939 * 1,2. Look up the parents
1940 * 3,4. Look up the children
1941 * 5. Take locks on the parents and children, in order
1942 * 6. Verify that the children haven't changed since they were looked up
1944 * If there was a race and the children changed since they were first looked
1945 * up, it is possible that mds_verify_child() will be able to just grab the
1946 * lock on the new child resource (if it has a higher resource than any other)
1947 * but we need to compare against not only its parent, but also against the
1948 * parent and child of the "other half" of the rename, hence maxres_{src,tgt}.
1950 * We need the fancy igrab() on the child inodes because we aren't holding a
1951 * lock on the parent after the lookup is done, so dentry->d_inode may change
1952 * at any time, and igrab() itself doesn't like getting passed a NULL argument.
1954 int mds_get_parents_children_locked(struct obd_device *obd,
1955 struct mds_obd *mds,
1956 struct ll_fid *p1_fid,
1957 struct dentry **de_srcdirp,
1958 struct ll_fid *p2_fid,
1959 struct dentry **de_tgtdirp,
1961 const char *old_name, int old_len,
1962 struct dentry **de_oldp,
1963 const char *new_name, int new_len,
1964 struct dentry **de_newp,
1965 struct lustre_handle *dlm_handles,
1968 struct ldlm_res_id p1_res_id = { .name = {0} };
1969 struct ldlm_res_id p2_res_id = { .name = {0} };
1970 struct ldlm_res_id c1_res_id = { .name = {0} };
1971 struct ldlm_res_id c2_res_id = { .name = {0} };
1972 ldlm_policy_data_t p_policy = {.l_inodebits = {MDS_INODELOCK_UPDATE}};
1973 /* Only dentry should disappear, but the inode itself would be
1974 intact otherwise. */
1975 ldlm_policy_data_t c1_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP}};
1976 /* If something is going to be replaced, both dentry and inode locks are needed */
1977 ldlm_policy_data_t c2_policy = {.l_inodebits = {MDS_INODELOCK_FULL}};
1978 struct ldlm_res_id *maxres_src, *maxres_tgt;
1979 struct inode *inode;
1980 int rc = 0, cleanup_phase = 0;
1983 /* Step 1: Lookup the source directory */
1984 *de_srcdirp = mds_fid2dentry(mds, p1_fid, NULL);
1985 if (IS_ERR(*de_srcdirp))
1986 GOTO(cleanup, rc = PTR_ERR(*de_srcdirp));
1988 cleanup_phase = 1; /* source directory dentry */
1990 p1_res_id.name[0] = (*de_srcdirp)->d_inode->i_ino;
1991 p1_res_id.name[1] = (*de_srcdirp)->d_inode->i_generation;
1993 /* Step 2: Lookup the target directory */
1994 if (memcmp(p1_fid, p2_fid, sizeof(*p1_fid)) == 0) {
1995 *de_tgtdirp = dget(*de_srcdirp);
1997 *de_tgtdirp = mds_fid2dentry(mds, p2_fid, NULL);
1998 if (IS_ERR(*de_tgtdirp)) {
1999 rc = PTR_ERR(*de_tgtdirp);
2005 cleanup_phase = 2; /* target directory dentry */
2007 p2_res_id.name[0] = (*de_tgtdirp)->d_inode->i_ino;
2008 p2_res_id.name[1] = (*de_tgtdirp)->d_inode->i_generation;
2010 /* Step 3: Lookup the source child entry */
2011 *de_oldp = ll_lookup_one_len(old_name, *de_srcdirp, old_len - 1);
2012 if (IS_ERR(*de_oldp)) {
2013 rc = PTR_ERR(*de_oldp);
2014 CDEBUG(D_INODE, "old child lookup error (%.*s): %d\n",
2015 old_len - 1, old_name, rc);
2019 cleanup_phase = 3; /* original name dentry */
2021 inode = (*de_oldp)->d_inode;
2023 inode = igrab(inode);
2025 GOTO(cleanup, rc = -ENOENT);
2027 c1_res_id.name[0] = inode->i_ino;
2028 c1_res_id.name[1] = inode->i_generation;
2032 /* Step 4: Lookup the target child entry */
2034 GOTO(retry_locks, rc);
2035 *de_newp = ll_lookup_one_len(new_name, *de_tgtdirp, new_len - 1);
2036 if (IS_ERR(*de_newp)) {
2037 rc = PTR_ERR(*de_newp);
2038 if (rc != -ENAMETOOLONG)
2039 CERROR("new child lookup error (%.*s): %d\n",
2040 old_len - 1, old_name, rc);
2044 cleanup_phase = 4; /* target dentry */
2046 inode = (*de_newp)->d_inode;
2048 inode = igrab(inode);
2052 c2_res_id.name[0] = inode->i_ino;
2053 c2_res_id.name[1] = inode->i_generation;
2057 /* Step 5: Take locks on the parents and child(ren) */
2058 maxres_src = &p1_res_id;
2059 maxres_tgt = &p2_res_id;
2060 cleanup_phase = 4; /* target dentry */
2062 if (c1_res_id.name[0] != 0 && res_gt(&c1_res_id, &p1_res_id,NULL,NULL))
2063 maxres_src = &c1_res_id;
2064 if (c2_res_id.name[0] != 0 && res_gt(&c2_res_id, &p2_res_id,NULL,NULL))
2065 maxres_tgt = &c2_res_id;
2067 rc = enqueue_4ordered_locks(obd, &p1_res_id,&dlm_handles[0],parent_mode,
2069 &p2_res_id, &dlm_handles[1], parent_mode,
2071 &c1_res_id, &dlm_handles[2], child_mode,
2073 &c2_res_id, &dlm_handles[3], child_mode,
2078 cleanup_phase = 6; /* parent and child(ren) locks */
2080 /* Step 6a: Re-lookup source child to verify it hasn't changed */
2081 rc = mds_verify_child(obd, &p1_res_id, &dlm_handles[0], *de_srcdirp,
2082 parent_mode, &c1_res_id, &dlm_handles[2], de_oldp,
2083 child_mode, &c1_policy, old_name, old_len,
2086 if (c2_res_id.name[0] != 0)
2087 ldlm_lock_decref(&dlm_handles[3], child_mode);
2088 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2095 if ((*de_oldp)->d_inode == NULL)
2096 GOTO(cleanup, rc = -ENOENT);
2100 /* Step 6b: Re-lookup target child to verify it hasn't changed */
2101 rc = mds_verify_child(obd, &p2_res_id, &dlm_handles[1], *de_tgtdirp,
2102 parent_mode, &c2_res_id, &dlm_handles[3], de_newp,
2103 child_mode, &c2_policy, new_name, new_len,
2106 ldlm_lock_decref(&dlm_handles[2], child_mode);
2107 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2117 switch (cleanup_phase) {
2118 case 6: /* child lock(s) */
2119 if (c2_res_id.name[0] != 0)
2120 ldlm_lock_decref(&dlm_handles[3], child_mode);
2121 if (c1_res_id.name[0] != 0)
2122 ldlm_lock_decref(&dlm_handles[2], child_mode);
2123 case 5: /* parent locks */
2124 ldlm_lock_decref(&dlm_handles[1], parent_mode);
2125 ldlm_lock_decref(&dlm_handles[0], parent_mode);
2126 case 4: /* target dentry */
2128 case 3: /* source dentry */
2130 case 2: /* target directory dentry */
2131 l_dput(*de_tgtdirp);
2132 case 1: /* source directry dentry */
2133 l_dput(*de_srcdirp);
2140 static int mds_reint_rename(struct mds_update_record *rec, int offset,
2141 struct ptlrpc_request *req,
2142 struct lustre_handle *lockh)
2144 struct obd_device *obd = req->rq_export->exp_obd;
2145 struct dentry *de_srcdir = NULL;
2146 struct dentry *de_tgtdir = NULL;
2147 struct dentry *de_old = NULL;
2148 struct dentry *de_new = NULL;
2149 struct inode *old_inode = NULL, *new_inode = NULL;
2150 struct mds_obd *mds = mds_req2mds(req);
2151 struct lustre_handle dlm_handles[4];
2152 struct mds_body *body = NULL;
2153 struct lov_mds_md *lmm = NULL;
2154 int rc = 0, lock_count = 3, cleanup_phase = 0;
2155 void *handle = NULL;
2156 unsigned int qcids[MAXQUOTAS] = { 0, 0 };
2157 unsigned int qpids[4] = { 0, 0, 0, 0 };
2160 LASSERT(offset == REQ_REC_OFF);
2161 offset = REPLY_REC_OFF;
2163 DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u %s to "LPU64"/%u %s",
2164 rec->ur_fid1->id, rec->ur_fid1->generation, rec->ur_name,
2165 rec->ur_fid2->id, rec->ur_fid2->generation, rec->ur_tgt);
2166 mds_counter_incr(req->rq_export, LPROC_MDS_RENAME);
2168 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
2171 ldlm_request_cancel(req, rec->ur_dlm, 0);
2173 rc = mds_get_parents_children_locked(obd, mds, rec->ur_fid1, &de_srcdir,
2174 rec->ur_fid2, &de_tgtdir, LCK_EX,
2175 rec->ur_name, rec->ur_namelen,
2176 &de_old, rec->ur_tgt,
2177 rec->ur_tgtlen, &de_new,
2178 dlm_handles, LCK_EX);
2182 cleanup_phase = 1; /* parent(s), children, locks */
2184 old_inode = de_old->d_inode;
2185 new_inode = de_new->d_inode;
2187 if (new_inode != NULL)
2190 /* sanity check for src inode */
2191 if (old_inode->i_ino == de_srcdir->d_inode->i_ino ||
2192 old_inode->i_ino == de_tgtdir->d_inode->i_ino)
2193 GOTO(cleanup, rc = -EINVAL);
2195 if (req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
2196 GOTO(cleanup, rc = -EROFS);
2198 if (new_inode == NULL)
2202 cleanup_phase = 2; /* iput(new_inode) when finished */
2204 /* sanity check for dest inode */
2205 if (new_inode->i_ino == de_srcdir->d_inode->i_ino ||
2206 new_inode->i_ino == de_tgtdir->d_inode->i_ino)
2207 GOTO(cleanup, rc = -EINVAL);
2209 if (old_inode == new_inode)
2210 GOTO(cleanup, rc = 0);
2212 /* save uids/gids for qunit acquire/release */
2213 qcids[USRQUOTA] = old_inode->i_uid;
2214 qcids[GRPQUOTA] = old_inode->i_gid;
2215 qpids[USRQUOTA] = de_tgtdir->d_inode->i_uid;
2216 qpids[GRPQUOTA] = de_tgtdir->d_inode->i_gid;
2217 qpids[2] = de_srcdir->d_inode->i_uid;
2218 qpids[3] = de_srcdir->d_inode->i_gid;
2220 /* if we are about to remove the target at first, pass the EA of
2221 * that inode to client to perform and cleanup on OST */
2222 body = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*body));
2223 LASSERT(body != NULL);
2225 /* child orphan sem protects orphan_dec_test && is_orphan race */
2226 MDS_DOWN_READ_ORPHAN_SEM(new_inode);
2227 cleanup_phase = 3; /* MDS_UP_READ_ORPHAN_SEM(new_inode) when finished */
2229 if ((S_ISDIR(new_inode->i_mode) && new_inode->i_nlink == 2) ||
2230 new_inode->i_nlink == 1) {
2231 if (mds_orphan_open_count(new_inode) > 0) {
2232 /* need to lock pending_dir before transaction */
2233 LOCK_INODE_MUTEX(mds->mds_pending_dir->d_inode);
2234 cleanup_phase = 4; /* UNLOCK_INODE_MUTEX(mds->mds_pending_dir->d_inode); */
2235 } else if (S_ISREG(new_inode->i_mode)) {
2236 mds_pack_inode2fid(&body->fid1, new_inode);
2237 mds_pack_inode2body(body, new_inode);
2238 mds_pack_md(obd, req->rq_repmsg, offset + 1, body,
2239 new_inode, MDS_PACK_MD_LOCK);
2244 OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
2245 de_srcdir->d_inode->i_sb);
2247 /* Check if we are moving old entry into its child. 2.6 does not
2248 check for this in vfs_rename() anymore */
2249 if (is_subdir(de_new, de_old))
2250 GOTO(cleanup, rc = -EINVAL);
2252 lmm = lustre_msg_buf(req->rq_repmsg, offset + 1, 0);
2253 handle = fsfilt_start_log(obd, de_tgtdir->d_inode, FSFILT_OP_RENAME,
2254 NULL, le32_to_cpu(lmm->lmm_stripe_count));
2257 GOTO(cleanup, rc = PTR_ERR(handle));
2260 de_old->d_fsdata = req;
2261 de_new->d_fsdata = req;
2263 rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
2266 if (rc == 0 && new_inode != NULL && new_inode->i_nlink == 0) {
2267 if (mds_orphan_open_count(new_inode) > 0)
2268 rc = mds_orphan_add_link(rec, obd, de_new);
2271 GOTO(cleanup, rc = 0);
2273 if (!S_ISREG(new_inode->i_mode))
2276 if (!(body->valid & OBD_MD_FLEASIZE)) {
2277 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
2278 OBD_MD_FLATIME | OBD_MD_FLMTIME);
2279 } else if (mds_log_op_unlink(obd,
2280 lustre_msg_buf(req->rq_repmsg,
2282 lustre_msg_buflen(req->rq_repmsg,
2284 lustre_msg_buf(req->rq_repmsg,
2286 lustre_msg_buflen(req->rq_repmsg,
2289 body->valid |= OBD_MD_FLCOOKIE;
2295 rc = mds_finish_transno(mds, de_tgtdir ? de_tgtdir->d_inode : NULL,
2296 handle, req, rc, 0, 0);
2298 switch (cleanup_phase) {
2300 UNLOCK_INODE_MUTEX(mds->mds_pending_dir->d_inode);
2302 MDS_UP_READ_ORPHAN_SEM(new_inode);
2307 if (lock_count == 4)
2308 ldlm_lock_decref(&(dlm_handles[3]), LCK_EX);
2309 ldlm_lock_decref(&(dlm_handles[2]), LCK_EX);
2310 ldlm_lock_decref(&(dlm_handles[1]), LCK_EX);
2311 ldlm_lock_decref(&(dlm_handles[0]), LCK_EX);
2313 if (lock_count == 4)
2314 ptlrpc_save_lock(req,&(dlm_handles[3]), LCK_EX);
2315 ptlrpc_save_lock(req, &(dlm_handles[2]), LCK_EX);
2316 ptlrpc_save_lock(req, &(dlm_handles[1]), LCK_EX);
2317 ptlrpc_save_lock(req, &(dlm_handles[0]), LCK_EX);
2326 CERROR("invalid cleanup_phase %d\n", cleanup_phase);
2329 req->rq_status = rc;
2331 /* acquire/release qunit */
2332 lquota_adjust(mds_quota_interface_ref, obd, qcids, qpids, rc, FSFILT_OP_RENAME);
2336 typedef int (*mds_reinter)(struct mds_update_record *, int offset,
2337 struct ptlrpc_request *, struct lustre_handle *);
2339 static mds_reinter reinters[REINT_MAX] = {
2340 [REINT_SETATTR] mds_reint_setattr,
2341 [REINT_CREATE] mds_reint_create,
2342 [REINT_LINK] mds_reint_link,
2343 [REINT_UNLINK] mds_reint_unlink,
2344 [REINT_RENAME] mds_reint_rename,
2345 [REINT_OPEN] mds_open
2348 int mds_reint_rec(struct mds_update_record *rec, int offset,
2349 struct ptlrpc_request *req, struct lustre_handle *lockh)
2351 struct obd_device *obd = req->rq_export->exp_obd;
2353 struct mds_obd *mds = &obd->u.mds;
2355 gid_t fsgid = rec->ur_uc.luc_fsgid;
2358 struct lvfs_run_ctxt saved;
2363 if (req->rq_uid != LNET_UID_ANY) {
2364 /* non-root local cluster client
2365 * NB root's creds are believed... */
2366 LASSERT (req->rq_uid != 0);
2367 rec->ur_uc.luc_fsuid = req->rq_uid;
2368 rec->ur_uc.luc_cap = 0;
2373 /* get group info of this user */
2374 rec->ur_uc.luc_uce = upcall_cache_get_entry(mds->mds_group_hash,
2375 rec->ur_uc.luc_fsuid,
2376 rec->ur_uc.luc_fsgid, 2,
2377 &rec->ur_uc.luc_suppgid1);
2379 if (IS_ERR(rec->ur_uc.luc_uce)) {
2380 rc = PTR_ERR(rec->ur_uc.luc_uce);
2381 rec->ur_uc.luc_uce = NULL;
2385 /* checked by unpacker */
2386 LASSERT(rec->ur_opcode < REINT_MAX && reinters[rec->ur_opcode] != NULL);
2389 if (rec->ur_uc.luc_uce)
2390 rec->ur_uc.luc_fsgid = rec->ur_uc.luc_uce->ue_primary;
2394 push_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
2398 if (rec->ur_uc.luc_uce && fsgid != rec->ur_uc.luc_fsgid &&
2399 in_group_p(fsgid)) {
2400 rec->ur_uc.luc_fsgid = fsgid;
2401 current->fsgid = saved.luc.luc_fsgid = fsgid;
2406 rc = reinters[rec->ur_opcode] (rec, offset, req, lockh);
2407 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
2410 upcall_cache_put_entry(mds->mds_group_hash, rec->ur_uc.luc_uce);