1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/mdt/mdt_open.c
38 * Lustre Metadata Target (mdt) open/close file handling
40 * Author: Huang Hua <huanghua@clusterfs.com>
44 # define EXPORT_SYMTAB
46 #define DEBUG_SUBSYSTEM S_MDS
48 #include <lustre_acl.h>
49 #include <lustre_mds.h>
50 #include "mdt_internal.h"
52 /* we do nothing because we do not have refcount now */
53 static void mdt_mfd_get(void *mfdp)
57 /* Create a new mdt_file_data struct, initialize it,
58 * and insert it to global hash table */
59 struct mdt_file_data *mdt_mfd_new(void)
61 struct mdt_file_data *mfd;
66 CFS_INIT_LIST_HEAD(&mfd->mfd_handle.h_link);
67 CFS_INIT_LIST_HEAD(&mfd->mfd_list);
68 class_handle_hash(&mfd->mfd_handle, mdt_mfd_get);
74 * Find the mfd pointed to by handle in global hash table.
75 * In case of replay the handle is obsoleted
76 * but mfd can be found in mfd list by that handle
78 struct mdt_file_data *mdt_handle2mfd(struct mdt_thread_info *info,
79 const struct lustre_handle *handle)
81 struct ptlrpc_request *req = mdt_info_req(info);
82 struct mdt_file_data *mfd;
85 LASSERT(handle != NULL);
86 mfd = class_handle2object(handle->cookie);
87 /* during dw/setattr replay the mfd can be found by old handle */
89 lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
90 struct mdt_export_data *med = &req->rq_export->exp_mdt_data;
91 list_for_each_entry(mfd, &med->med_open_head, mfd_list) {
92 if (mfd->mfd_old_handle.cookie == handle->cookie)
101 void mdt_mfd_free(struct mdt_file_data *mfd)
103 LASSERT(list_empty(&mfd->mfd_list));
104 OBD_FREE_RCU(mfd, sizeof *mfd, &mfd->mfd_handle);
107 static int mdt_create_data(struct mdt_thread_info *info,
108 struct mdt_object *p, struct mdt_object *o)
110 struct md_op_spec *spec = &info->mti_spec;
111 struct md_attr *ma = &info->mti_attr;
115 if (!md_should_create(spec->sp_cr_flags))
118 ma->ma_need = MA_INODE | MA_LOV;
120 rc = mdo_create_data(info->mti_env,
121 p ? mdt_object_child(p) : NULL,
122 mdt_object_child(o), spec, ma);
126 static int mdt_epoch_opened(struct mdt_object *mo)
128 return mo->mot_epochcount;
131 int mdt_sizeonmds_enabled(struct mdt_object *mo)
133 return !mo->mot_ioepoch;
136 /* Re-enable Size-on-MDS. */
137 void mdt_sizeonmds_enable(struct mdt_thread_info *info,
138 struct mdt_object *mo)
140 spin_lock(&info->mti_mdt->mdt_ioepoch_lock);
141 if (info->mti_epoch->ioepoch == mo->mot_ioepoch) {
142 LASSERT(!mdt_epoch_opened(mo));
146 spin_unlock(&info->mti_mdt->mdt_ioepoch_lock);
149 /* Open the epoch. Epoch open is allowed if @writecount is not negative.
150 * The epoch and writecount handling is performed under the mdt_ioepoch_lock. */
151 int mdt_epoch_open(struct mdt_thread_info *info, struct mdt_object *o)
153 struct mdt_device *mdt = info->mti_mdt;
158 if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM) ||
159 !S_ISREG(lu_object_attr(&o->mot_obj.mo_lu)))
162 spin_lock(&mdt->mdt_ioepoch_lock);
163 if (mdt_epoch_opened(o)) {
164 /* Epoch continues even if there is no writers yet. */
165 CDEBUG(D_INODE, "continue epoch "LPU64" for "DFID"\n",
166 o->mot_ioepoch, PFID(mdt_object_fid(o)));
168 if (info->mti_replayepoch > mdt->mdt_ioepoch)
169 mdt->mdt_ioepoch = info->mti_replayepoch;
172 o->mot_ioepoch = info->mti_replayepoch ?
173 info->mti_replayepoch : mdt->mdt_ioepoch;
174 CDEBUG(D_INODE, "starting epoch "LPU64" for "DFID"\n",
175 mdt->mdt_ioepoch, PFID(mdt_object_fid(o)));
179 spin_unlock(&mdt->mdt_ioepoch_lock);
181 /* Cancel Size-on-MDS attributes on clients if not truncate.
182 * In the later case, mdt_reint_setattr will do it. */
183 if (cancel && (info->mti_rr.rr_fid1 != NULL)) {
184 struct mdt_lock_handle *lh = &info->mti_lh[MDT_LH_CHILD];
185 mdt_lock_reg_init(lh, LCK_EX);
186 rc = mdt_object_lock(info, o, lh, MDS_INODELOCK_UPDATE,
189 mdt_object_unlock(info, o, lh, 1);
194 /* Update the on-disk attributes if needed and re-enable Size-on-MDS caching. */
195 static int mdt_sizeonmds_update(struct mdt_thread_info *info,
196 struct mdt_object *o)
200 CDEBUG(D_INODE, "Closing epoch "LPU64" on "DFID". Count %d\n",
201 o->mot_ioepoch, PFID(mdt_object_fid(o)), o->mot_epochcount);
203 if (info->mti_attr.ma_attr.la_valid & LA_SIZE) {
204 /* Do Size-on-MDS attribute update.
205 * Size-on-MDS is re-enabled inside. */
206 /* XXX: since we have opened the file, it is unnecessary
207 * to check permission when close it. Between the "open"
208 * and "close", maybe someone has changed the file mode
209 * or flags, or the file created mode do not permit wirte,
210 * and so on. Just set MDS_PERM_BYPASS for all the cases. */
211 info->mti_attr.ma_attr_flags |= MDS_PERM_BYPASS | MDS_SOM;
212 info->mti_attr.ma_attr.la_valid &= LA_SIZE | LA_BLOCKS |
213 LA_ATIME | LA_MTIME | LA_CTIME;
214 RETURN(mdt_attr_set(info, o, 0));
216 mdt_sizeonmds_enable(info, o);
221 * Returns 1 if epoch does not close.
222 * Returns 0 if epoch closes.
223 * Returns -EAGAIN if epoch closes but an Size-on-MDS Update is still needed
224 * from the client. */
225 static int mdt_epoch_close(struct mdt_thread_info *info, struct mdt_object *o)
227 int eviction = (mdt_info_req(info) == NULL ? 1 : 0);
228 struct lu_attr *la = &info->mti_attr.ma_attr;
234 if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM) ||
235 !S_ISREG(lu_object_attr(&o->mot_obj.mo_lu)))
238 spin_lock(&info->mti_mdt->mdt_ioepoch_lock);
240 /* Epoch closes only if client tells about it or eviction occures. */
241 if (eviction || (info->mti_epoch->flags & MF_EPOCH_CLOSE)) {
242 LASSERT(o->mot_epochcount);
245 CDEBUG(D_INODE, "Closing epoch "LPU64" on "DFID". Count %d\n",
246 o->mot_ioepoch, PFID(mdt_object_fid(o)),
250 achange = (info->mti_epoch->flags & MF_SOM_CHANGE);
253 if (!eviction && !mdt_epoch_opened(o)) {
254 /* Epoch ends. Is an Size-on-MDS update needed? */
255 if (o->mot_flags & MF_SOM_CHANGE) {
256 /* Some previous writer changed the attribute.
257 * Do not believe to the current Size-on-MDS
258 * update, re-ask client. */
260 } else if (!(la->la_valid & LA_SIZE) && achange) {
261 /* Attributes were changed by the last writer
262 * only but no Size-on-MDS update is received.*/
267 if (achange || eviction)
268 o->mot_flags |= MF_SOM_CHANGE;
271 opened = mdt_epoch_opened(o);
272 spin_unlock(&info->mti_mdt->mdt_ioepoch_lock);
274 /* If eviction occurred, do nothing. */
275 if ((rc == 0) && !opened && !eviction) {
276 /* Epoch ends and wanted Size-on-MDS update is obtained. */
277 rc = mdt_sizeonmds_update(info, o);
278 /* Avoid the following setattrs of these attributes, e.g.
279 * for atime update. */
280 info->mti_attr.ma_valid = 0;
285 int mdt_write_read(struct mdt_device *mdt, struct mdt_object *o)
289 spin_lock(&mdt->mdt_ioepoch_lock);
290 rc = o->mot_writecount;
291 spin_unlock(&mdt->mdt_ioepoch_lock);
295 int mdt_write_get(struct mdt_device *mdt, struct mdt_object *o)
299 spin_lock(&mdt->mdt_ioepoch_lock);
300 if (o->mot_writecount < 0)
304 spin_unlock(&mdt->mdt_ioepoch_lock);
308 static void mdt_write_put(struct mdt_device *mdt, struct mdt_object *o)
311 spin_lock(&mdt->mdt_ioepoch_lock);
313 spin_unlock(&mdt->mdt_ioepoch_lock);
317 static int mdt_write_deny(struct mdt_device *mdt, struct mdt_object *o)
321 spin_lock(&mdt->mdt_ioepoch_lock);
322 if (o->mot_writecount > 0)
326 spin_unlock(&mdt->mdt_ioepoch_lock);
330 static void mdt_write_allow(struct mdt_device *mdt, struct mdt_object *o)
333 spin_lock(&mdt->mdt_ioepoch_lock);
335 spin_unlock(&mdt->mdt_ioepoch_lock);
339 /* there can be no real transaction so prepare the fake one */
340 static void mdt_empty_transno(struct mdt_thread_info* info)
342 struct mdt_device *mdt = info->mti_mdt;
343 struct ptlrpc_request *req = mdt_info_req(info);
346 /* transaction is occured already */
347 if (lustre_msg_get_transno(req->rq_repmsg) != 0) {
352 spin_lock(&mdt->mdt_transno_lock);
353 if (info->mti_transno == 0) {
354 info->mti_transno = ++ mdt->mdt_last_transno;
356 /* should be replay */
357 if (info->mti_transno > mdt->mdt_last_transno)
358 mdt->mdt_last_transno = info->mti_transno;
360 spin_unlock(&mdt->mdt_transno_lock);
362 CDEBUG(D_INODE, "transno = %llu, last_committed = %llu\n",
364 req->rq_export->exp_obd->obd_last_committed);
366 req->rq_transno = info->mti_transno;
367 lustre_msg_set_transno(req->rq_repmsg, info->mti_transno);
368 lustre_msg_set_last_xid(req->rq_repmsg, req->rq_xid);
372 void mdt_mfd_set_mode(struct mdt_file_data *mfd, int mode)
374 LASSERT(mfd != NULL);
376 CDEBUG(D_HA, "Change mfd %p mode 0x%x->0x%x\n",
377 mfd, (unsigned int)mfd->mfd_mode, (unsigned int)mode);
379 mfd->mfd_mode = mode;
382 static int mdt_mfd_open(struct mdt_thread_info *info, struct mdt_object *p,
383 struct mdt_object *o, int flags, int created)
385 struct ptlrpc_request *req = mdt_info_req(info);
386 struct mdt_export_data *med = &req->rq_export->exp_mdt_data;
387 struct mdt_file_data *mfd;
388 struct md_attr *ma = &info->mti_attr;
389 struct lu_attr *la = &ma->ma_attr;
390 struct mdt_body *repbody;
391 int rc = 0, isdir, isreg;
394 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
396 isreg = S_ISREG(la->la_mode);
397 isdir = S_ISDIR(la->la_mode);
398 if (isreg && !(ma->ma_valid & MA_LOV)) {
400 * No EA, check whether it is will set regEA and dirEA since in
401 * above attr get, these size might be zero, so reset it, to
402 * retrieve the MD after create obj.
404 ma->ma_lmm_size = req_capsule_get_size(info->mti_pill,
407 /* in replay case, p == NULL */
408 rc = mdt_create_data(info, p, o);
413 CDEBUG(D_INODE, "after open, ma_valid bit = "LPX64" lmm_size = %d\n",
414 ma->ma_valid, ma->ma_lmm_size);
416 if (ma->ma_valid & MA_LOV) {
417 LASSERT(ma->ma_lmm_size != 0);
418 repbody->eadatasize = ma->ma_lmm_size;
420 repbody->valid |= OBD_MD_FLDIREA;
422 repbody->valid |= OBD_MD_FLEASIZE;
425 if (flags & FMODE_WRITE) {
426 rc = mdt_write_get(info->mti_mdt, o);
428 mdt_epoch_open(info, o);
429 repbody->ioepoch = o->mot_ioepoch;
431 } else if (flags & MDS_FMODE_EXEC) {
432 rc = mdt_write_deny(info->mti_mdt, o);
437 rc = mo_open(info->mti_env, mdt_object_child(o),
438 created ? flags | MDS_OPEN_CREATED : flags);
445 * Keep a reference on this object for this open, and is
446 * released by mdt_mfd_close().
448 mdt_object_get(info->mti_env, o);
451 * @flags is always not zero. At least it should be FMODE_READ,
452 * FMODE_WRITE or FMODE_EXEC.
457 mdt_mfd_set_mode(mfd, flags);
460 mfd->mfd_xid = req->rq_xid;
463 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
464 struct mdt_file_data *old_mfd;
465 /* Check wheather old cookie already exist in
466 * the list, becasue when do recovery, client
467 * might be disconnected from server, and
468 * restart replay, so there maybe some orphan
469 * mfd here, we should remove them */
470 LASSERT(info->mti_rr.rr_handle != NULL);
471 old_mfd = mdt_handle2mfd(info, info->mti_rr.rr_handle);
473 CDEBUG(D_HA, "del orph mfd %p cookie" LPX64"\n",
474 mfd, info->mti_rr.rr_handle->cookie);
475 spin_lock(&med->med_open_lock);
476 class_handle_unhash(&old_mfd->mfd_handle);
477 list_del_init(&old_mfd->mfd_list);
478 spin_unlock(&med->med_open_lock);
479 mdt_mfd_free(old_mfd);
481 CDEBUG(D_HA, "Store old cookie "LPX64" in new mfd\n",
482 info->mti_rr.rr_handle->cookie);
483 mfd->mfd_old_handle.cookie =
484 info->mti_rr.rr_handle->cookie;
486 spin_lock(&med->med_open_lock);
487 list_add(&mfd->mfd_list, &med->med_open_head);
488 spin_unlock(&med->med_open_lock);
490 repbody->handle.cookie = mfd->mfd_handle.h_cookie;
491 mdt_empty_transno(info);
499 static int mdt_finish_open(struct mdt_thread_info *info,
500 struct mdt_object *p, struct mdt_object *o,
501 int flags, int created, struct ldlm_reply *rep)
503 struct ptlrpc_request *req = mdt_info_req(info);
504 struct obd_export *exp = req->rq_export;
505 struct mdt_export_data *med = &req->rq_export->exp_mdt_data;
506 struct md_attr *ma = &info->mti_attr;
507 struct lu_attr *la = &ma->ma_attr;
508 struct mdt_file_data *mfd;
509 struct mdt_body *repbody;
511 int isreg, isdir, islnk;
515 LASSERT(ma->ma_valid & MA_INODE);
517 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
519 isreg = S_ISREG(la->la_mode);
520 isdir = S_ISDIR(la->la_mode);
521 islnk = S_ISLNK(la->la_mode);
522 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(o));
524 if (exp_connect_rmtclient(exp)) {
525 void *buf = req_capsule_server_get(info->mti_pill, &RMF_ACL);
527 rc = mdt_pack_remote_perm(info, o, buf);
529 repbody->valid &= ~OBD_MD_FLRMTPERM;
530 repbody->aclsize = 0;
532 repbody->valid |= OBD_MD_FLRMTPERM;
533 repbody->aclsize = sizeof(struct mdt_remote_perm);
536 #ifdef CONFIG_FS_POSIX_ACL
537 else if (exp->exp_connect_flags & OBD_CONNECT_ACL) {
538 const struct lu_env *env = info->mti_env;
539 struct md_object *next = mdt_object_child(o);
540 struct lu_buf *buf = &info->mti_buf;
542 buf->lb_buf = req_capsule_server_get(info->mti_pill, &RMF_ACL);
543 buf->lb_len = req_capsule_get_size(info->mti_pill, &RMF_ACL,
545 if (buf->lb_len > 0) {
546 rc = mo_xattr_get(env, next, buf,
547 XATTR_NAME_ACL_ACCESS);
549 if (rc == -ENODATA) {
550 repbody->aclsize = 0;
551 repbody->valid |= OBD_MD_FLACL;
553 } else if (rc == -EOPNOTSUPP) {
556 CERROR("got acl size: %d\n", rc);
559 repbody->aclsize = rc;
560 repbody->valid |= OBD_MD_FLACL;
567 if (info->mti_mdt->mdt_opts.mo_mds_capa &&
568 exp->exp_connect_flags & OBD_CONNECT_MDS_CAPA) {
569 struct lustre_capa *capa;
571 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA1);
573 capa->lc_opc = CAPA_OPC_MDS_DEFAULT;
574 rc = mo_capa_get(info->mti_env, mdt_object_child(o), capa, 0);
577 repbody->valid |= OBD_MD_FLMDSCAPA;
579 if (info->mti_mdt->mdt_opts.mo_oss_capa &&
580 exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA &&
581 S_ISREG(lu_object_attr(&o->mot_obj.mo_lu))) {
582 struct lustre_capa *capa;
584 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
586 capa->lc_opc = CAPA_OPC_OSS_DEFAULT | capa_open_opc(flags);
587 rc = mo_capa_get(info->mti_env, mdt_object_child(o), capa, 0);
590 repbody->valid |= OBD_MD_FLOSSCAPA;
594 * If we are following a symlink, don't open; and do not return open
595 * handle for special nodes as client required.
597 if (islnk || (!isreg && !isdir &&
598 (req->rq_export->exp_connect_flags & OBD_CONNECT_NODEVOH))) {
599 lustre_msg_set_transno(req->rq_repmsg, 0);
603 mdt_set_disposition(info, rep, DISP_OPEN_OPEN);
606 * We need to return the existing object's fid back, so it is done here,
607 * after preparing the reply.
609 if (!created && (flags & MDS_OPEN_EXCL) && (flags & MDS_OPEN_CREAT))
612 /* This can't be done earlier, we need to return reply body */
614 if (flags & (MDS_OPEN_CREAT | FMODE_WRITE)) {
615 /* We are trying to create or write an existing dir. */
618 } else if (flags & MDS_OPEN_DIRECTORY)
621 if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MDS_OPEN_CREATE,
622 OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE)) {
627 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) {
628 spin_lock(&med->med_open_lock);
629 list_for_each(t, &med->med_open_head) {
630 mfd = list_entry(t, struct mdt_file_data, mfd_list);
631 if (mfd->mfd_xid == req->rq_xid) {
636 spin_unlock(&med->med_open_lock);
639 repbody->handle.cookie = mfd->mfd_handle.h_cookie;
640 /*set repbody->ea_size for resent case*/
641 if (ma->ma_valid & MA_LOV) {
642 LASSERT(ma->ma_lmm_size != 0);
643 repbody->eadatasize = ma->ma_lmm_size;
645 repbody->valid |= OBD_MD_FLDIREA;
647 repbody->valid |= OBD_MD_FLEASIZE;
653 rc = mdt_mfd_open(info, p, o, flags, created);
657 extern void mdt_req_from_lcd(struct ptlrpc_request *req,
658 struct lsd_client_data *lcd);
660 void mdt_reconstruct_open(struct mdt_thread_info *info,
661 struct mdt_lock_handle *lhc)
663 const struct lu_env *env = info->mti_env;
664 struct mdt_device *mdt = info->mti_mdt;
665 struct req_capsule *pill = info->mti_pill;
666 struct ptlrpc_request *req = mdt_info_req(info);
667 struct mdt_export_data *med = &req->rq_export->exp_mdt_data;
668 struct lsd_client_data *lcd = med->med_lcd;
669 struct md_attr *ma = &info->mti_attr;
670 struct mdt_reint_record *rr = &info->mti_rr;
671 __u32 flags = info->mti_spec.sp_cr_flags;
672 struct ldlm_reply *ldlm_rep;
673 struct mdt_object *parent;
674 struct mdt_object *child;
675 struct mdt_body *repbody;
679 LASSERT(pill->rc_fmt == &RQF_LDLM_INTENT_OPEN);
680 ldlm_rep = req_capsule_server_get(pill, &RMF_DLM_REP);
681 repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
683 ma->ma_lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
684 ma->ma_lmm_size = req_capsule_get_size(pill, &RMF_MDT_MD,
686 ma->ma_need = MA_INODE;
687 if (ma->ma_lmm_size > 0)
688 ma->ma_need |= MA_LOV;
692 mdt_req_from_lcd(req, med->med_lcd);
693 mdt_set_disposition(info, ldlm_rep, lcd->lcd_last_data);
695 CERROR("This is reconstruct open: disp="LPX64", result=%d\n",
696 ldlm_rep->lock_policy_res1, req->rq_status);
698 if (mdt_get_disposition(ldlm_rep, DISP_OPEN_CREATE) &&
700 /* We did not create successfully, return error to client. */
701 GOTO(out, rc = req->rq_status);
703 if (mdt_get_disposition(ldlm_rep, DISP_OPEN_CREATE)) {
704 struct obd_export *exp = req->rq_export;
706 * We failed after creation, but we do not know in which step
707 * we failed. So try to check the child object.
709 parent = mdt_object_find(env, mdt, rr->rr_fid1);
710 if (IS_ERR(parent)) {
711 rc = PTR_ERR(parent);
712 LCONSOLE_WARN("Parent "DFID" lookup error %d."
713 " Evicting client %s with export %s.\n",
714 PFID(mdt_object_fid(parent)), rc,
715 obd_uuid2str(&exp->exp_client_uuid),
716 obd_export_nid2str(exp));
717 mdt_export_evict(exp);
721 child = mdt_object_find(env, mdt, rr->rr_fid2);
724 LCONSOLE_WARN("Child "DFID" lookup error %d."
725 " Evicting client %s with export %s.\n",
726 PFID(mdt_object_fid(child)), rc,
727 obd_uuid2str(&exp->exp_client_uuid),
728 obd_export_nid2str(exp));
729 mdt_export_evict(exp);
733 rc = mdt_object_exists(child);
735 struct md_object *next;
737 mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
738 next = mdt_object_child(child);
739 rc = mo_attr_get(env, next, ma);
741 rc = mdt_finish_open(info, parent, child,
744 /* the child object was created on remote server */
745 repbody->fid1 = *rr->rr_fid2;
746 repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
748 } else if (rc == 0) {
749 /* the child does not exist, we should do regular open */
750 mdt_object_put(env, parent);
751 mdt_object_put(env, child);
752 GOTO(regular_open, 0);
754 mdt_object_put(env, parent);
755 mdt_object_put(env, child);
759 /* We did not try to create, so we are a pure open */
760 rc = mdt_reint_open(info, lhc);
766 lustre_msg_set_status(req->rq_repmsg, req->rq_status);
767 LASSERT(ergo(rc < 0, lustre_msg_get_transno(req->rq_repmsg) == 0));
770 static int mdt_open_by_fid(struct mdt_thread_info* info,
771 struct ldlm_reply *rep)
773 const struct lu_env *env = info->mti_env;
774 __u32 flags = info->mti_spec.sp_cr_flags;
775 struct mdt_reint_record *rr = &info->mti_rr;
776 struct md_attr *ma = &info->mti_attr;
777 struct mdt_object *o;
781 o = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid2);
783 RETURN(rc = PTR_ERR(o));
785 rc = mdt_object_exists(o);
787 mdt_set_disposition(info, rep, (DISP_IT_EXECD |
791 rc = mo_attr_get(env, mdt_object_child(o), ma);
793 rc = mdt_finish_open(info, NULL, o, flags, 0, rep);
794 } else if (rc == 0) {
797 /* the child object was created on remote server */
798 struct mdt_body *repbody;
799 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
800 repbody->fid1 = *rr->rr_fid2;
801 repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
805 mdt_object_put(info->mti_env, o);
809 int mdt_pin(struct mdt_thread_info* info)
812 RETURN(err_serious(-EOPNOTSUPP));
815 /* Cross-ref request. Currently it can only be a pure open (w/o create) */
816 static int mdt_cross_open(struct mdt_thread_info* info,
817 const struct lu_fid *fid,
818 struct ldlm_reply *rep, __u32 flags)
820 struct md_attr *ma = &info->mti_attr;
821 struct mdt_object *o;
825 o = mdt_object_find(info->mti_env, info->mti_mdt, fid);
827 RETURN(rc = PTR_ERR(o));
829 rc = mdt_object_exists(o);
831 /* Do permission check for cross-open. */
832 rc = mo_permission(info->mti_env, NULL, mdt_object_child(o),
833 NULL, flags | MDS_OPEN_CROSS);
837 mdt_set_capainfo(info, 0, fid, BYPASS_CAPA);
838 rc = mo_attr_get(info->mti_env, mdt_object_child(o), ma);
840 rc = mdt_finish_open(info, NULL, o, flags, 0, rep);
841 } else if (rc == 0) {
843 * Something is wrong here. lookup was positive but there is
846 CERROR("Cross-ref object doesn't exist!\n");
849 /* Something is wrong here, the object is on another MDS! */
850 CERROR("The object isn't on this server! FLD error?\n");
851 LU_OBJECT_DEBUG(D_WARNING, info->mti_env,
853 "Object isn't on this server! FLD error?\n");
859 mdt_object_put(info->mti_env, o);
863 int mdt_reint_open(struct mdt_thread_info *info, struct mdt_lock_handle *lhc)
865 struct mdt_device *mdt = info->mti_mdt;
866 struct ptlrpc_request *req = mdt_info_req(info);
867 struct mdt_object *parent;
868 struct mdt_object *child;
869 struct mdt_lock_handle *lh;
870 struct ldlm_reply *ldlm_rep;
871 struct mdt_body *repbody;
872 struct lu_fid *child_fid = &info->mti_tmp_fid1;
873 struct md_attr *ma = &info->mti_attr;
874 __u32 create_flags = info->mti_spec.sp_cr_flags;
875 struct mdt_reint_record *rr = &info->mti_rr;
876 struct lu_name *lname;
882 OBD_FAIL_TIMEOUT_ORSET(OBD_FAIL_MDS_PAUSE_OPEN, OBD_FAIL_ONCE,
883 (obd_timeout + 1) / 4);
885 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
887 ma->ma_lmm = req_capsule_server_get(info->mti_pill, &RMF_MDT_MD);
888 ma->ma_lmm_size = req_capsule_get_size(info->mti_pill, &RMF_MDT_MD,
890 ma->ma_need = MA_INODE;
891 if (ma->ma_lmm_size > 0)
892 ma->ma_need |= MA_LOV;
896 LASSERT(info->mti_pill->rc_fmt == &RQF_LDLM_INTENT_OPEN);
897 ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
899 /* TODO: JOIN file */
900 if (create_flags & MDS_OPEN_JOIN_FILE) {
901 CERROR("JOIN file will be supported soon\n");
902 GOTO(out, result = err_serious(-EOPNOTSUPP));
904 msg_flags = lustre_msg_get_flags(req->rq_reqmsg);
906 CDEBUG(D_INODE, "I am going to open "DFID"/(%s->"DFID") "
907 "cr_flag=0%o mode=0%06o msg_flag=0x%x\n",
908 PFID(rr->rr_fid1), rr->rr_name,
909 PFID(rr->rr_fid2), create_flags,
910 ma->ma_attr.la_mode, msg_flags);
912 if (msg_flags & MSG_REPLAY ||
913 (req->rq_export->exp_libclient && create_flags&MDS_OPEN_HAS_EA)) {
914 /* This is a replay request or from liblustre with ea. */
915 result = mdt_open_by_fid(info, ldlm_rep);
917 if (result != -ENOENT) {
918 if (req->rq_export->exp_libclient &&
919 create_flags&MDS_OPEN_HAS_EA)
920 GOTO(out, result = 0);
924 * We didn't find the correct object, so we need to re-create it
925 * via a regular replay.
927 if (!(create_flags & MDS_OPEN_CREAT)) {
928 DEBUG_REQ(D_ERROR, req,"OPEN & CREAT not in open replay.");
929 GOTO(out, result = -EFAULT);
931 CDEBUG(D_INFO, "Open replay did find object, continue as "
935 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK))
936 GOTO(out, result = err_serious(-ENOMEM));
938 mdt_set_disposition(info, ldlm_rep,
939 (DISP_IT_EXECD | DISP_LOOKUP_EXECD));
941 if (info->mti_cross_ref) {
942 /* This is cross-ref open */
943 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
944 result = mdt_cross_open(info, rr->rr_fid1, ldlm_rep,
949 lh = &info->mti_lh[MDT_LH_PARENT];
950 mdt_lock_pdo_init(lh, (create_flags & MDS_OPEN_CREAT) ?
951 LCK_PW : LCK_PR, rr->rr_name, rr->rr_namelen);
953 parent = mdt_object_find_lock(info, rr->rr_fid1, lh,
954 MDS_INODELOCK_UPDATE);
956 GOTO(out, result = PTR_ERR(parent));
960 lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
962 result = mdo_lookup(info->mti_env, mdt_object_child(parent),
963 lname, child_fid, &info->mti_spec);
964 LASSERTF(ergo(result == 0, fid_is_sane(child_fid)),
965 "looking for "DFID"/%s, result fid="DFID"\n",
966 PFID(mdt_object_fid(parent)), rr->rr_name, PFID(child_fid));
968 if (result != 0 && result != -ENOENT && result != -ESTALE)
969 GOTO(out_parent, result);
971 if (result == -ENOENT || result == -ESTALE) {
972 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG);
973 if (result == -ESTALE) {
975 * -ESTALE means the parent is a dead(unlinked) dir, so
976 * it should return -ENOENT to in accordance with the
977 * original mds implementaion.
979 GOTO(out_parent, result = -ENOENT);
981 if (!(create_flags & MDS_OPEN_CREAT))
982 GOTO(out_parent, result);
983 *child_fid = *info->mti_rr.rr_fid2;
984 LASSERTF(fid_is_sane(child_fid), "fid="DFID"\n",
988 * Check for O_EXCL is moved to the mdt_finish_open(), we need to
989 * return FID back in that case.
991 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
994 child = mdt_object_find(info->mti_env, mdt, child_fid);
996 GOTO(out_parent, result = PTR_ERR(child));
998 mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
999 if (result == -ENOENT) {
1000 /* Not found and with MDS_OPEN_CREAT: let's create it. */
1001 mdt_set_disposition(info, ldlm_rep, DISP_OPEN_CREATE);
1003 /* Let lower layers know what is lock mode on directory. */
1004 info->mti_spec.sp_cr_mode =
1005 mdt_dlm_mode2mdl_mode(lh->mlh_pdo_mode);
1008 * Do not perform lookup sanity check. We know that name does
1011 info->mti_spec.sp_cr_lookup = 0;
1012 info->mti_spec.sp_feat = &dt_directory_features;
1014 result = mdo_create(info->mti_env,
1015 mdt_object_child(parent),
1017 mdt_object_child(child),
1020 if (result == -ERESTART) {
1021 mdt_clear_disposition(info, ldlm_rep, DISP_OPEN_CREATE);
1022 GOTO(out_child, result);
1025 GOTO(out_child, result);
1029 /* We have to get attr & lov ea for this object */
1030 result = mo_attr_get(info->mti_env, mdt_object_child(child),
1033 * The object is on remote node, return its FID for remote open.
1035 if (result == -EREMOTE) {
1037 * Check if this lock already was sent to client and
1038 * this is resent case. For resent case do not take lock
1039 * again, use what is already granted.
1041 LASSERT(lhc != NULL);
1043 if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
1044 struct ldlm_lock *lock;
1046 LASSERT(msg_flags & MSG_RESENT);
1048 lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
1050 CERROR("Invalid lock handle "LPX64"\n",
1051 lhc->mlh_reg_lh.cookie);
1054 LASSERT(fid_res_name_eq(mdt_object_fid(child),
1055 &lock->l_resource->lr_name));
1056 LDLM_LOCK_PUT(lock);
1059 mdt_lock_handle_init(lhc);
1060 mdt_lock_reg_init(lhc, LCK_PR);
1062 rc = mdt_object_lock(info, child, lhc,
1063 MDS_INODELOCK_LOOKUP,
1066 repbody->fid1 = *mdt_object_fid(child);
1067 repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
1070 GOTO(out_child, result);
1074 LASSERT(!lustre_handle_is_used(&lhc->mlh_reg_lh));
1076 /* get openlock if this is not replay and if a client requested it */
1077 if (!(msg_flags & MSG_REPLAY) && create_flags & MDS_OPEN_LOCK) {
1081 if (create_flags & FMODE_WRITE)
1083 else if (create_flags & MDS_FMODE_EXEC)
1087 mdt_lock_handle_init(lhc);
1088 mdt_lock_reg_init(lhc, lm);
1089 rc = mdt_object_lock(info, child, lhc,
1090 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_OPEN,
1094 GOTO(out_child, result);
1097 mdt_set_disposition(info, ldlm_rep, DISP_OPEN_LOCK);
1101 /* Try to open it now. */
1102 rc = mdt_finish_open(info, parent, child, create_flags,
1106 if (lustre_handle_is_used(&lhc->mlh_reg_lh))
1107 /* openlock was acquired and mdt_finish_open failed -
1108 drop the openlock */
1109 mdt_object_unlock(info, child, lhc, 1);
1113 ma->ma_cookie_size = 0;
1114 info->mti_no_need_trans = 1;
1115 rc = mdo_unlink(info->mti_env,
1116 mdt_object_child(parent),
1117 mdt_object_child(child),
1121 CERROR("Error in cleanup of open\n");
1126 mdt_object_put(info->mti_env, child);
1128 mdt_object_unlock_put(info, parent, lh, result);
1130 if (result && result != -EREMOTE)
1131 lustre_msg_set_transno(req->rq_repmsg, 0);
1135 #define MFD_CLOSED(mode) (((mode) & ~(FMODE_EPOCH | FMODE_SOM | \
1136 FMODE_EPOCHLCK)) == FMODE_CLOSED)
1138 static int mdt_mfd_closed(struct mdt_file_data *mfd)
1140 return ((mfd == NULL) || MFD_CLOSED(mfd->mfd_mode));
1143 int mdt_mfd_close(struct mdt_thread_info *info, struct mdt_file_data *mfd)
1145 struct mdt_object *o = mfd->mfd_object;
1146 struct md_object *next = mdt_object_child(o);
1147 struct md_attr *ma = &info->mti_attr;
1148 int rc = 0, ret = 0;
1152 mode = mfd->mfd_mode;
1154 if ((mode & FMODE_WRITE) || (mode & FMODE_EPOCHLCK)) {
1155 mdt_write_put(info->mti_mdt, o);
1156 ret = mdt_epoch_close(info, o);
1157 } else if (mode & MDS_FMODE_EXEC) {
1158 mdt_write_allow(info->mti_mdt, o);
1159 } else if (mode & FMODE_EPOCH) {
1160 ret = mdt_epoch_close(info, o);
1163 /* Update atime on close only. */
1164 if ((mode & MDS_FMODE_EXEC || mode & FMODE_READ || mode & FMODE_WRITE)
1165 && (ma->ma_valid & MA_INODE) && (ma->ma_attr.la_valid & LA_ATIME)) {
1166 /* Set the atime only. */
1167 ma->ma_attr.la_valid = LA_ATIME;
1168 rc = mo_attr_set(info->mti_env, next, ma);
1171 ma->ma_need |= MA_INODE;
1174 if (!MFD_CLOSED(mode))
1175 rc = mo_close(info->mti_env, next, ma);
1176 else if (ret == -EAGAIN)
1177 rc = mo_attr_get(info->mti_env, next, ma);
1179 /* If the object is unlinked, do not try to re-enable SIZEONMDS */
1180 if ((ret == -EAGAIN) && (ma->ma_valid & MA_INODE) &&
1181 (ma->ma_attr.la_nlink == 0)) {
1185 if ((ret == -EAGAIN) || (ret == 1)) {
1186 struct mdt_export_data *med;
1188 /* The epoch has not closed or Size-on-MDS update is needed.
1189 * Put mfd back into the list. */
1190 LASSERT(mdt_conn_flags(info) & OBD_CONNECT_SOM);
1191 mdt_mfd_set_mode(mfd, (ret == 1 ? FMODE_EPOCH : FMODE_SOM));
1193 LASSERT(mdt_info_req(info));
1194 med = &mdt_info_req(info)->rq_export->exp_mdt_data;
1195 spin_lock(&med->med_open_lock);
1196 list_add(&mfd->mfd_list, &med->med_open_head);
1197 class_handle_hash_back(&mfd->mfd_handle);
1198 spin_unlock(&med->med_open_lock);
1203 CDEBUG(D_INODE, "Size-on-MDS attribute update is "
1204 "needed on "DFID"\n", PFID(mdt_object_fid(o)));
1208 mdt_object_put(info->mti_env, o);
1211 RETURN(rc ? rc : ret);
1214 int mdt_close(struct mdt_thread_info *info)
1216 struct mdt_export_data *med;
1217 struct mdt_file_data *mfd;
1218 struct mdt_object *o;
1219 struct md_attr *ma = &info->mti_attr;
1220 struct mdt_body *repbody = NULL;
1221 struct ptlrpc_request *req = mdt_info_req(info);
1225 /* Close may come with the Size-on-MDS update. Unpack it. */
1226 rc = mdt_close_unpack(info);
1228 RETURN(err_serious(rc));
1230 LASSERT(info->mti_epoch);
1232 req_capsule_set_size(info->mti_pill, &RMF_MDT_MD, RCL_SERVER,
1233 info->mti_mdt->mdt_max_mdsize);
1234 req_capsule_set_size(info->mti_pill, &RMF_LOGCOOKIES, RCL_SERVER,
1235 info->mti_mdt->mdt_max_cookiesize);
1236 rc = req_capsule_server_pack(info->mti_pill);
1237 if (mdt_check_resent(info, mdt_reconstruct_generic, NULL))
1238 RETURN(lustre_msg_get_status(req->rq_repmsg));
1240 /* Continue to close handle even if we can not pack reply */
1242 repbody = req_capsule_server_get(info->mti_pill,
1244 ma->ma_lmm = req_capsule_server_get(info->mti_pill,
1246 ma->ma_lmm_size = req_capsule_get_size(info->mti_pill,
1249 ma->ma_cookie = req_capsule_server_get(info->mti_pill,
1251 ma->ma_cookie_size = req_capsule_get_size(info->mti_pill,
1254 ma->ma_need = MA_INODE | MA_LOV | MA_COOKIE;
1255 repbody->eadatasize = 0;
1256 repbody->aclsize = 0;
1258 rc = err_serious(rc);
1261 med = &req->rq_export->exp_mdt_data;
1262 spin_lock(&med->med_open_lock);
1263 mfd = mdt_handle2mfd(info, &info->mti_epoch->handle);
1264 if (mdt_mfd_closed(mfd)) {
1265 spin_unlock(&med->med_open_lock);
1266 CDEBUG(D_INODE, "no handle for file close: fid = "DFID
1267 ": cookie = "LPX64"\n", PFID(info->mti_rr.rr_fid1),
1268 info->mti_epoch->handle.cookie);
1269 rc = err_serious(-ESTALE);
1271 class_handle_unhash(&mfd->mfd_handle);
1272 list_del_init(&mfd->mfd_list);
1273 spin_unlock(&med->med_open_lock);
1275 /* Do not lose object before last unlink. */
1276 o = mfd->mfd_object;
1277 mdt_object_get(info->mti_env, o);
1278 ret = mdt_mfd_close(info, mfd);
1279 if (repbody != NULL)
1280 rc = mdt_handle_last_unlink(info, o, ma);
1281 mdt_empty_transno(info);
1282 mdt_object_put(info->mti_env, o);
1284 if (repbody != NULL)
1285 mdt_shrink_reply(info);
1287 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK))
1288 RETURN(err_serious(-ENOMEM));
1290 if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MDS_CLOSE_NET_REP,
1291 OBD_FAIL_MDS_CLOSE_NET_REP))
1292 info->mti_fail_id = OBD_FAIL_MDS_CLOSE_NET_REP;
1293 RETURN(rc ? rc : ret);
1296 int mdt_done_writing(struct mdt_thread_info *info)
1298 struct mdt_body *repbody = NULL;
1299 struct mdt_export_data *med;
1300 struct mdt_file_data *mfd;
1304 rc = req_capsule_server_pack(info->mti_pill);
1306 RETURN(err_serious(rc));
1308 repbody = req_capsule_server_get(info->mti_pill,
1310 repbody->eadatasize = 0;
1311 repbody->aclsize = 0;
1313 /* Done Writing may come with the Size-on-MDS update. Unpack it. */
1314 rc = mdt_close_unpack(info);
1316 RETURN(err_serious(rc));
1318 if (mdt_check_resent(info, mdt_reconstruct_generic, NULL))
1319 RETURN(lustre_msg_get_status(mdt_info_req(info)->rq_repmsg));
1321 med = &info->mti_exp->exp_mdt_data;
1322 spin_lock(&med->med_open_lock);
1323 mfd = mdt_handle2mfd(info, &info->mti_epoch->handle);
1325 spin_unlock(&med->med_open_lock);
1326 CDEBUG(D_INODE, "no handle for done write: fid = "DFID
1327 ": cookie = "LPX64"\n", PFID(info->mti_rr.rr_fid1),
1328 info->mti_epoch->handle.cookie);
1332 LASSERT(mfd->mfd_mode == FMODE_EPOCH ||
1333 mfd->mfd_mode == FMODE_EPOCHLCK);
1334 class_handle_unhash(&mfd->mfd_handle);
1335 list_del_init(&mfd->mfd_list);
1336 spin_unlock(&med->med_open_lock);
1338 /* Set EPOCH CLOSE flag if not set by client. */
1339 info->mti_epoch->flags |= MF_EPOCH_CLOSE;
1340 info->mti_attr.ma_valid = 0;
1341 rc = mdt_mfd_close(info, mfd);
1342 mdt_empty_transno(info);