4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/mdt/mdt_reint.c
38 * Lustre Metadata Target (mdt) reintegration routines
40 * Author: Peter Braam <braam@clusterfs.com>
41 * Author: Andreas Dilger <adilger@clusterfs.com>
42 * Author: Phil Schwan <phil@clusterfs.com>
43 * Author: Huang Hua <huanghua@clusterfs.com>
44 * Author: Yury Umanets <umka@clusterfs.com>
47 #define DEBUG_SUBSYSTEM S_MDS
49 #include "mdt_internal.h"
51 static inline void mdt_reint_init_ma(struct mdt_thread_info *info,
54 ma->ma_need = MA_INODE;
58 static int mdt_create_pack_capa(struct mdt_thread_info *info, int rc,
59 struct mdt_object *object,
60 struct mdt_body *repbody)
64 /* for cross-ref mkdir, mds capa has been fetched from remote obj, then
65 * we won't go to below*/
66 if (repbody->valid & OBD_MD_FLMDSCAPA)
69 if (rc == 0 && info->mti_mdt->mdt_opts.mo_mds_capa &&
70 exp_connect_flags(info->mti_exp) & OBD_CONNECT_MDS_CAPA) {
71 struct lustre_capa *capa;
73 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA1);
75 capa->lc_opc = CAPA_OPC_MDS_DEFAULT;
76 rc = mo_capa_get(info->mti_env, mdt_object_child(object), capa,
79 repbody->valid |= OBD_MD_FLMDSCAPA;
86 * Get version of object by fid.
88 * Return real version or ENOENT_VERSION if object doesn't exist
90 static void mdt_obj_version_get(struct mdt_thread_info *info,
91 struct mdt_object *o, __u64 *version)
94 if (mdt_object_exists(o) && !mdt_object_remote(o) &&
95 !fid_is_obf(mdt_object_fid(o)))
96 *version = dt_version_get(info->mti_env, mdt_obj2dt(o));
98 *version = ENOENT_VERSION;
99 CDEBUG(D_INODE, "FID "DFID" version is "LPX64"\n",
100 PFID(mdt_object_fid(o)), *version);
104 * Check version is correct.
106 * Should be called only during replay.
108 static int mdt_version_check(struct ptlrpc_request *req,
109 __u64 version, int idx)
111 __u64 *pre_ver = lustre_msg_get_versions(req->rq_reqmsg);
114 if (!exp_connect_vbr(req->rq_export))
117 LASSERT(req_is_replay(req));
118 /** VBR: version is checked always because costs nothing */
119 LASSERT(idx < PTLRPC_NUM_VERSIONS);
120 /** Sanity check for malformed buffers */
121 if (pre_ver == NULL) {
122 CERROR("No versions in request buffer\n");
123 spin_lock(&req->rq_export->exp_lock);
124 req->rq_export->exp_vbr_failed = 1;
125 spin_unlock(&req->rq_export->exp_lock);
127 } else if (pre_ver[idx] != version) {
128 CDEBUG(D_INODE, "Version mismatch "LPX64" != "LPX64"\n",
129 pre_ver[idx], version);
130 spin_lock(&req->rq_export->exp_lock);
131 req->rq_export->exp_vbr_failed = 1;
132 spin_unlock(&req->rq_export->exp_lock);
139 * Save pre-versions in reply.
141 static void mdt_version_save(struct ptlrpc_request *req, __u64 version,
146 if (!exp_connect_vbr(req->rq_export))
149 LASSERT(!req_is_replay(req));
150 LASSERT(req->rq_repmsg != NULL);
151 reply_ver = lustre_msg_get_versions(req->rq_repmsg);
153 reply_ver[idx] = version;
157 * Save enoent version, it is needed when it is obvious that object doesn't
158 * exist, e.g. child during create.
160 static void mdt_enoent_version_save(struct mdt_thread_info *info, int idx)
162 /* save version of file name for replay, it must be ENOENT here */
163 if (!req_is_replay(mdt_info_req(info))) {
164 info->mti_ver[idx] = ENOENT_VERSION;
165 mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx);
170 * Get version from disk and save in reply buffer.
172 * Versions are saved in reply only during normal operations not replays.
174 void mdt_version_get_save(struct mdt_thread_info *info,
175 struct mdt_object *mto, int idx)
177 /* don't save versions during replay */
178 if (!req_is_replay(mdt_info_req(info))) {
179 mdt_obj_version_get(info, mto, &info->mti_ver[idx]);
180 mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx);
185 * Get version from disk and check it, no save in reply.
187 int mdt_version_get_check(struct mdt_thread_info *info,
188 struct mdt_object *mto, int idx)
190 /* only check versions during replay */
191 if (!req_is_replay(mdt_info_req(info)))
194 mdt_obj_version_get(info, mto, &info->mti_ver[idx]);
195 return mdt_version_check(mdt_info_req(info), info->mti_ver[idx], idx);
199 * Get version from disk and check if recovery or just save.
201 int mdt_version_get_check_save(struct mdt_thread_info *info,
202 struct mdt_object *mto, int idx)
206 mdt_obj_version_get(info, mto, &info->mti_ver[idx]);
207 if (req_is_replay(mdt_info_req(info)))
208 rc = mdt_version_check(mdt_info_req(info), info->mti_ver[idx],
211 mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx);
216 * Lookup with version checking.
218 * This checks version of 'name'. Many reint functions uses 'name' for child not
219 * FID, therefore we need to get object by name and check its version.
221 int mdt_lookup_version_check(struct mdt_thread_info *info,
222 struct mdt_object *p, struct lu_name *lname,
223 struct lu_fid *fid, int idx)
227 rc = mdo_lookup(info->mti_env, mdt_object_child(p), lname, fid,
229 /* Check version only during replay */
230 if (!req_is_replay(mdt_info_req(info)))
233 info->mti_ver[idx] = ENOENT_VERSION;
235 struct mdt_object *child;
236 child = mdt_object_find(info->mti_env, info->mti_mdt, fid);
237 if (likely(!IS_ERR(child))) {
238 mdt_obj_version_get(info, child, &info->mti_ver[idx]);
239 mdt_object_put(info->mti_env, child);
242 vbrc = mdt_version_check(mdt_info_req(info), info->mti_ver[idx], idx);
243 return vbrc ? vbrc : rc;
248 * VBR: we save three versions in reply:
249 * 0 - parent. Check that parent version is the same during replay.
250 * 1 - name. Version of 'name' if file exists with the same name or
251 * ENOENT_VERSION, it is needed because file may appear due to missed replays.
252 * 2 - child. Version of child by FID. Must be ENOENT. It is mostly sanity
255 static int mdt_md_create(struct mdt_thread_info *info)
257 struct mdt_device *mdt = info->mti_mdt;
258 struct mdt_object *parent;
259 struct mdt_object *child;
260 struct mdt_lock_handle *lh;
261 struct mdt_body *repbody;
262 struct md_attr *ma = &info->mti_attr;
263 struct mdt_reint_record *rr = &info->mti_rr;
264 struct lu_name *lname;
268 DEBUG_REQ(D_INODE, mdt_info_req(info), "Create (%s->"DFID") in "DFID,
269 rr->rr_name, PFID(rr->rr_fid2), PFID(rr->rr_fid1));
271 if (fid_is_obf(rr->rr_fid1) || fid_is_dot_lustre(rr->rr_fid1))
274 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
276 lh = &info->mti_lh[MDT_LH_PARENT];
277 mdt_lock_pdo_init(lh, LCK_PW, rr->rr_name, rr->rr_namelen);
279 parent = mdt_object_find_lock(info, rr->rr_fid1, lh,
280 MDS_INODELOCK_UPDATE);
282 RETURN(PTR_ERR(parent));
284 rc = mdt_version_get_check_save(info, parent, 0);
286 GOTO(out_put_parent, rc);
289 * Check child name version during replay.
290 * During create replay a file may exist with same name.
292 lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
293 rc = mdt_lookup_version_check(info, parent, lname,
294 &info->mti_tmp_fid1, 1);
296 GOTO(out_put_parent, rc = -EEXIST);
298 /* -ENOENT is expected here */
300 GOTO(out_put_parent, rc);
302 /* save version of file name for replay, it must be ENOENT here */
303 mdt_enoent_version_save(info, 1);
305 child = mdt_object_new(info->mti_env, mdt, rr->rr_fid2);
306 if (likely(!IS_ERR(child))) {
307 struct md_object *next = mdt_object_child(parent);
309 if (mdt_object_remote(child)) {
310 struct seq_server_site *ss;
311 struct lu_ucred *uc = mdt_ucred(info);
313 if (!md_capable(uc, CFS_CAP_SYS_ADMIN)) {
315 mdt->mdt_enable_remote_dir_gid &&
316 mdt->mdt_enable_remote_dir_gid != -1) {
317 CERROR("%s: Creating remote dir is only"
318 " permitted for administrator or"
319 " set mdt_enable_remote_dir_gid:"
321 mdt_obd_name(mdt), -EPERM);
322 GOTO(out_put_child, rc = -EPERM);
326 ss = mdt_seq_site(mdt);
327 if (ss->ss_node_id != 0 &&
328 mdt->mdt_enable_remote_dir == 0) {
329 CERROR("%s: remote dir is only permitted on"
331 " mdt.*.enable_remote_dir=1\n",
333 GOTO(out_put_child, rc = -EPERM);
335 if (!mdt_is_dne_client(mdt_info_req(info)->rq_export)) {
336 /* Return -EIO for old client */
337 GOTO(out_put_child, rc = -EIO);
341 ma->ma_need = MA_INODE;
343 /* capa for cross-ref will be stored here */
344 ma->ma_capa = req_capsule_server_get(info->mti_pill,
346 LASSERT(ma->ma_capa);
348 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
349 OBD_FAIL_MDS_REINT_CREATE_WRITE);
351 /* Version of child will be updated on disk. */
352 info->mti_mos = child;
353 rc = mdt_version_get_check_save(info, child, 2);
355 GOTO(out_put_child, rc);
357 /* Let lower layer know current lock mode. */
358 info->mti_spec.sp_cr_mode =
359 mdt_dlm_mode2mdl_mode(lh->mlh_pdo_mode);
362 * Do not perform lookup sanity check. We know that name does
365 info->mti_spec.sp_cr_lookup = 0;
366 info->mti_spec.sp_feat = &dt_directory_features;
368 rc = mdo_create(info->mti_env, next, lname,
369 mdt_object_child(child),
370 &info->mti_spec, ma);
372 rc = mdt_attr_get_complex(info, child, ma);
375 /* Return fid & attr to client. */
376 if (ma->ma_valid & MA_INODE)
377 mdt_pack_attr2body(info, repbody, &ma->ma_attr,
378 mdt_object_fid(child));
381 mdt_object_put(info->mti_env, child);
385 mdt_create_pack_capa(info, rc, child, repbody);
387 mdt_object_unlock_put(info, parent, lh, rc);
391 int mdt_attr_set(struct mdt_thread_info *info, struct mdt_object *mo,
392 struct md_attr *ma, int flags)
394 struct mdt_lock_handle *lh;
395 int do_vbr = ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID|LA_FLAGS);
396 __u64 lockpart = MDS_INODELOCK_UPDATE;
400 /* attr shouldn't be set on remote object */
401 LASSERT(!mdt_object_remote(mo));
403 lh = &info->mti_lh[MDT_LH_PARENT];
404 mdt_lock_reg_init(lh, LCK_PW);
406 /* Even though the new MDT will grant PERM lock to the old
407 * client, but the old client will almost ignore that during
408 * So it needs to revoke both LOOKUP and PERM lock here, so
409 * both new and old client can cancel the dcache */
410 if (ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID))
411 lockpart |= MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM;
413 rc = mdt_object_lock(info, mo, lh, lockpart, MDT_LOCAL_LOCK);
417 if (mdt_object_exists(mo) == 0)
418 GOTO(out_unlock, rc = -ENOENT);
420 /* all attrs are packed into mti_attr in unpack_setattr */
421 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
422 OBD_FAIL_MDS_REINT_SETATTR_WRITE);
424 /* This is only for set ctime when rename's source is on remote MDS. */
425 if (unlikely(ma->ma_attr.la_valid == LA_CTIME))
426 ma->ma_attr_flags |= MDS_VTX_BYPASS;
428 /* VBR: update version if attr changed are important for recovery */
430 /* update on-disk version of changed object */
432 rc = mdt_version_get_check_save(info, mo, 0);
434 GOTO(out_unlock, rc);
437 /* all attrs are packed into mti_attr in unpack_setattr */
438 rc = mo_attr_set(info->mti_env, mdt_object_child(mo), ma);
440 GOTO(out_unlock, rc);
444 mdt_object_unlock(info, mo, lh, rc);
449 * Check HSM flags and add HS_DIRTY flag if relevant.
451 * A file could be set dirty only if it has a copy in the backend (HS_EXISTS)
452 * and is not RELEASED.
454 int mdt_add_dirty_flag(struct mdt_thread_info *info, struct mdt_object *mo,
460 /* If the file was modified, add the dirty flag */
461 ma->ma_need = MA_HSM;
462 rc = mdt_attr_get_complex(info, mo, ma);
464 CERROR("file attribute read error for "DFID": %d.\n",
465 PFID(mdt_object_fid(mo)), rc);
469 /* If an up2date copy exists in the backend, add dirty flag */
470 if ((ma->ma_valid & MA_HSM) && (ma->ma_hsm.mh_flags & HS_EXISTS)
471 && !(ma->ma_hsm.mh_flags & (HS_DIRTY|HS_RELEASED))) {
473 ma->ma_hsm.mh_flags |= HS_DIRTY;
474 rc = mdt_hsm_attr_set(info, mo, &ma->ma_hsm);
476 CERROR("file attribute change error for "DFID": %d\n",
477 PFID(mdt_object_fid(mo)), rc);
485 static int mdt_reint_setattr(struct mdt_thread_info *info,
486 struct mdt_lock_handle *lhc)
488 struct md_attr *ma = &info->mti_attr;
489 struct mdt_reint_record *rr = &info->mti_rr;
490 struct ptlrpc_request *req = mdt_info_req(info);
491 struct mdt_export_data *med = &req->rq_export->exp_mdt_data;
492 struct mdt_file_data *mfd;
493 struct mdt_object *mo;
494 struct mdt_body *repbody;
498 DEBUG_REQ(D_INODE, req, "setattr "DFID" %x", PFID(rr->rr_fid1),
499 (unsigned int)ma->ma_attr.la_valid);
501 if (info->mti_dlm_req)
502 ldlm_request_cancel(req, info->mti_dlm_req, 0);
504 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
505 mo = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
507 GOTO(out, rc = PTR_ERR(mo));
509 /* start a log jounal handle if needed */
510 if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM)) {
511 if ((ma->ma_attr.la_valid & LA_SIZE) ||
512 (rr->rr_flags & MRF_OPEN_TRUNC)) {
513 /* Check write access for the O_TRUNC case */
514 if (mdt_write_read(mo) < 0)
515 GOTO(out_put, rc = -ETXTBSY);
517 } else if (info->mti_ioepoch &&
518 (info->mti_ioepoch->flags & MF_EPOCH_OPEN)) {
519 /* Truncate case. IOEpoch is opened. */
520 rc = mdt_write_get(mo);
524 mfd = mdt_mfd_new(med);
527 GOTO(out_put, rc = -ENOMEM);
530 mdt_ioepoch_open(info, mo, 0);
531 repbody->ioepoch = mo->mot_ioepoch;
533 mdt_object_get(info->mti_env, mo);
534 mdt_mfd_set_mode(mfd, MDS_FMODE_TRUNC);
535 mfd->mfd_object = mo;
536 mfd->mfd_xid = req->rq_xid;
538 spin_lock(&med->med_open_lock);
539 cfs_list_add(&mfd->mfd_list, &med->med_open_head);
540 spin_unlock(&med->med_open_lock);
541 repbody->handle.cookie = mfd->mfd_handle.h_cookie;
544 som_au = info->mti_ioepoch && info->mti_ioepoch->flags & MF_SOM_CHANGE;
546 /* SOM Attribute update case. Find the proper mfd and update
547 * SOM attributes on the proper object. */
548 LASSERT(mdt_conn_flags(info) & OBD_CONNECT_SOM);
549 LASSERT(info->mti_ioepoch);
551 spin_lock(&med->med_open_lock);
552 mfd = mdt_handle2mfd(med, &info->mti_ioepoch->handle,
555 spin_unlock(&med->med_open_lock);
556 CDEBUG(D_INODE, "no handle for file close: "
557 "fid = "DFID": cookie = "LPX64"\n",
558 PFID(info->mti_rr.rr_fid1),
559 info->mti_ioepoch->handle.cookie);
560 GOTO(out_put, rc = -ESTALE);
562 LASSERT(mfd->mfd_mode == MDS_FMODE_SOM);
563 LASSERT(!(info->mti_ioepoch->flags & MF_EPOCH_CLOSE));
565 class_handle_unhash(&mfd->mfd_handle);
566 cfs_list_del_init(&mfd->mfd_list);
567 spin_unlock(&med->med_open_lock);
569 mdt_mfd_close(info, mfd);
570 } else if ((ma->ma_valid & MA_INODE) && ma->ma_attr.la_valid) {
571 LASSERT((ma->ma_valid & MA_LOV) == 0);
572 rc = mdt_attr_set(info, mo, ma, rr->rr_flags);
575 } else if ((ma->ma_valid & MA_LOV) && (ma->ma_valid & MA_INODE)) {
576 struct lu_buf *buf = &info->mti_buf;
577 LASSERT(ma->ma_attr.la_valid == 0);
578 buf->lb_buf = ma->ma_lmm;
579 buf->lb_len = ma->ma_lmm_size;
580 rc = mo_xattr_set(info->mti_env, mdt_object_child(mo),
581 buf, XATTR_NAME_LOV, 0);
587 /* If file data is modified, add the dirty flag */
588 if (ma->ma_attr_flags & MDS_DATA_MODIFIED)
589 rc = mdt_add_dirty_flag(info, mo, ma);
591 ma->ma_need = MA_INODE;
593 rc = mdt_attr_get_complex(info, mo, ma);
597 mdt_pack_attr2body(info, repbody, &ma->ma_attr, mdt_object_fid(mo));
599 if (info->mti_mdt->mdt_opts.mo_oss_capa &&
600 exp_connect_flags(info->mti_exp) & OBD_CONNECT_OSS_CAPA &&
601 S_ISREG(lu_object_attr(&mo->mot_obj)) &&
602 (ma->ma_attr.la_valid & LA_SIZE) && !som_au) {
603 struct lustre_capa *capa;
605 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
607 capa->lc_opc = CAPA_OPC_OSS_DEFAULT | CAPA_OPC_OSS_TRUNC;
608 rc = mo_capa_get(info->mti_env, mdt_object_child(mo), capa, 0);
611 repbody->valid |= OBD_MD_FLOSSCAPA;
616 mdt_object_put(info->mti_env, mo);
619 mdt_counter_incr(req, LPROC_MDT_SETATTR);
621 mdt_client_compatibility(info);
622 rc2 = mdt_fix_reply(info);
628 static int mdt_reint_create(struct mdt_thread_info *info,
629 struct mdt_lock_handle *lhc)
631 struct ptlrpc_request *req = mdt_info_req(info);
635 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
636 RETURN(err_serious(-ESTALE));
638 if (info->mti_dlm_req)
639 ldlm_request_cancel(mdt_info_req(info), info->mti_dlm_req, 0);
641 LASSERT(info->mti_rr.rr_namelen > 0);
642 switch (info->mti_attr.ma_attr.la_mode & S_IFMT) {
644 mdt_counter_incr(req, LPROC_MDT_MKDIR);
652 /* Special file should stay on the same node as parent. */
653 mdt_counter_incr(req, LPROC_MDT_MKNOD);
656 CERROR("%s: Unsupported mode %o\n",
657 mdt_obd_name(info->mti_mdt),
658 info->mti_attr.ma_attr.la_mode);
659 RETURN(err_serious(-EOPNOTSUPP));
662 rc = mdt_md_create(info);
667 * VBR: save parent version in reply and child version getting by its name.
668 * Version of child is getting and checking during its lookup. If
670 static int mdt_reint_unlink(struct mdt_thread_info *info,
671 struct mdt_lock_handle *lhc)
673 struct mdt_reint_record *rr = &info->mti_rr;
674 struct ptlrpc_request *req = mdt_info_req(info);
675 struct md_attr *ma = &info->mti_attr;
676 struct lu_fid *child_fid = &info->mti_tmp_fid1;
677 struct mdt_object *mp;
678 struct mdt_object *mc;
679 struct mdt_lock_handle *parent_lh;
680 struct mdt_lock_handle *child_lh;
681 struct lu_name *lname;
686 DEBUG_REQ(D_INODE, req, "unlink "DFID"/%s", PFID(rr->rr_fid1),
689 if (info->mti_dlm_req)
690 ldlm_request_cancel(req, info->mti_dlm_req, 0);
692 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
693 RETURN(err_serious(-ENOENT));
695 if (fid_is_obf(rr->rr_fid1) || fid_is_dot_lustre(rr->rr_fid1))
698 * step 1: Found the parent.
700 mp = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
706 parent_lh = &info->mti_lh[MDT_LH_PARENT];
707 lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
708 if (mdt_object_remote(mp)) {
709 mdt_lock_reg_init(parent_lh, LCK_EX);
710 rc = mdt_remote_object_lock(info, mp, &parent_lh->mlh_rreg_lh,
711 parent_lh->mlh_rreg_mode,
712 MDS_INODELOCK_UPDATE);
714 GOTO(put_parent, rc);
717 mdt_lock_pdo_init(parent_lh, LCK_PW, rr->rr_name,
719 rc = mdt_object_lock(info, mp, parent_lh, MDS_INODELOCK_UPDATE,
722 GOTO(put_parent, rc);
724 rc = mdt_version_get_check_save(info, mp, 0);
726 GOTO(unlock_parent, rc);
729 /* step 2: find & lock the child */
730 /* lookup child object along with version checking */
732 rc = mdt_lookup_version_check(info, mp, lname, child_fid, 1);
734 /* Name might not be able to find during resend of
735 * remote unlink, considering following case.
736 * dir_A is a remote directory, the name entry of
737 * dir_A is on MDT0, the directory is on MDT1,
739 * 1. client sends unlink req to MDT1.
740 * 2. MDT1 sends name delete update to MDT0.
741 * 3. name entry is being deleted in MDT0 synchronously.
742 * 4. MDT1 is restarted.
743 * 5. client resends unlink req to MDT1. So it can not
744 * find the name entry on MDT0 anymore.
745 * In this case, MDT1 only needs to destory the local
748 if (mdt_object_remote(mp) && rc == -ENOENT &&
749 !fid_is_zero(rr->rr_fid2) &&
750 lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) {
752 *child_fid = *rr->rr_fid2;
754 GOTO(unlock_parent, rc);
758 if (fid_is_obf(child_fid) || fid_is_dot_lustre(child_fid))
759 GOTO(unlock_parent, rc = -EPERM);
761 mdt_reint_init_ma(info, ma);
763 /* We will lock the child regardless it is local or remote. No harm. */
764 mc = mdt_object_find(info->mti_env, info->mti_mdt, child_fid);
766 GOTO(unlock_parent, rc = PTR_ERR(mc));
768 child_lh = &info->mti_lh[MDT_LH_CHILD];
769 mdt_lock_reg_init(child_lh, LCK_EX);
770 if (mdt_object_remote(mc)) {
771 struct mdt_body *repbody;
773 if (!fid_is_zero(rr->rr_fid2)) {
774 CDEBUG(D_INFO, "%s: name %s can not find "DFID"\n",
775 mdt_obd_name(info->mti_mdt),
776 (char *)rr->rr_name, PFID(mdt_object_fid(mc)));
777 GOTO(put_child, rc = -ENOENT);
779 CDEBUG(D_INFO, "%s: name %s: "DFID" is another MDT\n",
780 mdt_obd_name(info->mti_mdt),
781 (char *)rr->rr_name, PFID(mdt_object_fid(mc)));
783 if (!mdt_is_dne_client(req->rq_export))
784 /* Return -EIO for old client */
785 GOTO(put_child, rc = -EIO);
787 if (info->mti_spec.sp_rm_entry) {
788 struct lu_ucred *uc = mdt_ucred(info);
790 if (!md_capable(uc, CFS_CAP_SYS_ADMIN)) {
791 CERROR("%s: unlink remote entry is only "
792 "permitted for administrator: rc = %d\n",
793 mdt_obd_name(info->mti_mdt),
795 GOTO(put_child, rc = -EPERM);
798 ma->ma_need = MA_INODE;
800 mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
801 rc = mdo_unlink(info->mti_env, mdt_object_child(mp),
802 NULL, lname, ma, no_name);
805 /* Revoke the LOOKUP lock of the remote object granted by
806 * this MDT. Since the unlink will happen on another MDT,
807 * it will release the LOOKUP lock right away. Then What
808 * would happen if another client try to grab the LOOKUP
809 * lock at the same time with unlink XXX */
810 mdt_object_lock(info, mc, child_lh, MDS_INODELOCK_LOOKUP,
812 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
813 LASSERT(repbody != NULL);
814 repbody->fid1 = *mdt_object_fid(mc);
815 repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
816 GOTO(unlock_child, rc = -EREMOTE);
817 } else if (info->mti_spec.sp_rm_entry) {
819 CDEBUG(D_INFO, "%s: no rm_entry on local dir '%s': rc = %d\n",
820 mdt_obd_name(info->mti_mdt), (char *)rr->rr_name, rc);
824 rc = mdt_object_lock(info, mc, child_lh, MDS_INODELOCK_FULL,
830 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
831 OBD_FAIL_MDS_REINT_UNLINK_WRITE);
832 /* save version when object is locked */
833 mdt_version_get_save(info, mc, 1);
835 * Now we can only make sure we need MA_INODE, in mdd layer, will check
836 * whether need MA_LOV and MA_COOKIE.
838 ma->ma_need = MA_INODE;
840 mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
842 rc = mdo_unlink(info->mti_env, mdt_object_child(mp),
843 mdt_object_child(mc), lname, ma, no_name);
844 if (rc == 0 && !lu_object_is_dying(&mc->mot_header))
845 rc = mdt_attr_get_complex(info, mc, ma);
847 mdt_handle_last_unlink(info, mc, ma);
849 if (ma->ma_valid & MA_INODE) {
850 switch (ma->ma_attr.la_mode & S_IFMT) {
852 mdt_counter_incr(req, LPROC_MDT_RMDIR);
860 mdt_counter_incr(req, LPROC_MDT_UNLINK);
863 LASSERTF(0, "bad file type %o unlinking\n",
864 ma->ma_attr.la_mode);
870 mdt_object_unlock(info, mc, child_lh, rc);
872 mdt_object_put(info->mti_env, mc);
874 mdt_object_unlock(info, mp, parent_lh, rc);
876 mdt_object_put(info->mti_env, mp);
882 * VBR: save versions in reply: 0 - parent; 1 - child by fid; 2 - target by
885 static int mdt_reint_link(struct mdt_thread_info *info,
886 struct mdt_lock_handle *lhc)
888 struct mdt_reint_record *rr = &info->mti_rr;
889 struct ptlrpc_request *req = mdt_info_req(info);
890 struct md_attr *ma = &info->mti_attr;
891 struct mdt_object *ms;
892 struct mdt_object *mp;
893 struct mdt_lock_handle *lhs;
894 struct mdt_lock_handle *lhp;
895 struct lu_name *lname;
899 DEBUG_REQ(D_INODE, req, "link "DFID" to "DFID"/%s",
900 PFID(rr->rr_fid1), PFID(rr->rr_fid2), rr->rr_name);
902 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
903 RETURN(err_serious(-ENOENT));
905 if (info->mti_dlm_req)
906 ldlm_request_cancel(req, info->mti_dlm_req, 0);
908 /* Invalid case so return error immediately instead of
910 if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2))
913 if (fid_is_obf(rr->rr_fid1) || fid_is_dot_lustre(rr->rr_fid1) ||
914 fid_is_obf(rr->rr_fid2) || fid_is_dot_lustre(rr->rr_fid2))
917 /* step 1: find & lock the target parent dir */
918 lhp = &info->mti_lh[MDT_LH_PARENT];
919 mdt_lock_pdo_init(lhp, LCK_PW, rr->rr_name,
921 mp = mdt_object_find_lock(info, rr->rr_fid2, lhp,
922 MDS_INODELOCK_UPDATE);
926 rc = mdt_version_get_check_save(info, mp, 0);
928 GOTO(out_unlock_parent, rc);
930 /* step 2: find & lock the source */
931 lhs = &info->mti_lh[MDT_LH_CHILD];
932 mdt_lock_reg_init(lhs, LCK_EX);
934 ms = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
936 GOTO(out_unlock_parent, rc = PTR_ERR(ms));
938 if (mdt_object_remote(ms)) {
939 mdt_object_put(info->mti_env, ms);
940 CERROR("%s: source inode "DFID" on remote MDT from "DFID"\n",
941 mdt_obd_name(info->mti_mdt), PFID(rr->rr_fid1),
943 GOTO(out_unlock_parent, rc = -EXDEV);
946 rc = mdt_object_lock(info, ms, lhs, MDS_INODELOCK_UPDATE,
949 mdt_object_put(info->mti_env, ms);
950 GOTO(out_unlock_parent, rc);
953 /* step 3: link it */
954 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
955 OBD_FAIL_MDS_REINT_LINK_WRITE);
958 rc = mdt_version_get_check_save(info, ms, 1);
960 GOTO(out_unlock_child, rc);
962 lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
963 /** check target version by name during replay */
964 rc = mdt_lookup_version_check(info, mp, lname, &info->mti_tmp_fid1, 2);
965 if (rc != 0 && rc != -ENOENT)
966 GOTO(out_unlock_child, rc);
967 /* save version of file name for replay, it must be ENOENT here */
968 if (!req_is_replay(mdt_info_req(info))) {
970 CDEBUG(D_INFO, "link target %.*s existed!\n",
971 rr->rr_namelen, (char *)rr->rr_name);
972 GOTO(out_unlock_child, rc = -EEXIST);
974 info->mti_ver[2] = ENOENT_VERSION;
975 mdt_version_save(mdt_info_req(info), info->mti_ver[2], 2);
978 rc = mdo_link(info->mti_env, mdt_object_child(mp),
979 mdt_object_child(ms), lname, ma);
982 mdt_counter_incr(req, LPROC_MDT_LINK);
986 mdt_object_unlock_put(info, ms, lhs, rc);
988 mdt_object_unlock_put(info, mp, lhp, rc);
992 * lock the part of the directory according to the hash of the name
993 * (lh->mlh_pdo_hash) in parallel directory lock.
995 static int mdt_pdir_hash_lock(struct mdt_thread_info *info,
996 struct mdt_lock_handle *lh,
997 struct mdt_object *obj, __u64 ibits)
999 struct ldlm_res_id *res = &info->mti_res_id;
1000 struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
1001 ldlm_policy_data_t *policy = &info->mti_policy;
1005 * Finish res_id initializing by name hash marking part of
1006 * directory which is taking modification.
1008 LASSERT(lh->mlh_pdo_hash != 0);
1009 fid_build_pdo_res_name(mdt_object_fid(obj), lh->mlh_pdo_hash, res);
1010 memset(policy, 0, sizeof(*policy));
1011 policy->l_inodebits.bits = ibits;
1013 * Use LDLM_FL_LOCAL_ONLY for this lock. We do not know yet if it is
1014 * going to be sent to client. If it is - mdt_intent_policy() path will
1015 * fix it up and turn FL_LOCAL flag off.
1017 rc = mdt_fid_lock(ns, &lh->mlh_reg_lh, lh->mlh_reg_mode, policy,
1018 res, LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB,
1019 &info->mti_exp->exp_handle.h_cookie);
1023 static int mdt_rename_lock(struct mdt_thread_info *info,
1024 struct lustre_handle *lh)
1026 struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
1027 ldlm_policy_data_t *policy = &info->mti_policy;
1028 struct ldlm_res_id *res_id = &info->mti_res_id;
1033 fid_build_reg_res_name(&LUSTRE_BFL_FID, res_id);
1035 memset(policy, 0, sizeof *policy);
1036 policy->l_inodebits.bits = MDS_INODELOCK_UPDATE;
1037 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 4, 53, 0)
1038 /* In phase I, we will not do cross-rename, so local BFL lock would
1041 flags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB;
1043 * Current node is controller, that is mdt0, where we should
1046 rc = ldlm_cli_enqueue_local(ns, res_id, LDLM_IBITS, policy,
1047 LCK_EX, &flags, ldlm_blocking_ast,
1048 ldlm_completion_ast, NULL, NULL, 0,
1050 &info->mti_exp->exp_handle.h_cookie,
1053 #warning "Local rename lock is invalid for DNE phase II."
1058 static void mdt_rename_unlock(struct lustre_handle *lh)
1061 LASSERT(lustre_handle_is_used(lh));
1062 ldlm_lock_decref(lh, LCK_EX);
1067 * This is is_subdir() variant, it is CMD if cmm forwards it to correct
1068 * target. Source should not be ancestor of target dir. May be other rename
1069 * checks can be moved here later.
1071 static int mdt_rename_sanity(struct mdt_thread_info *info, struct lu_fid *fid)
1073 struct mdt_reint_record *rr = &info->mti_rr;
1074 struct lu_fid dst_fid = *rr->rr_fid2;
1075 struct mdt_object *dst;
1080 LASSERT(fid_is_sane(&dst_fid));
1081 dst = mdt_object_find(info->mti_env, info->mti_mdt, &dst_fid);
1083 rc = mdo_is_subdir(info->mti_env,
1084 mdt_object_child(dst), fid,
1086 mdt_object_put(info->mti_env, dst);
1087 if (rc != -EREMOTE && rc < 0) {
1088 CERROR("Failed mdo_is_subdir(), rc %d\n", rc);
1090 /* check the found fid */
1091 if (lu_fid_eq(&dst_fid, fid))
1097 } while (rc == -EREMOTE);
1103 * VBR: rename versions in reply: 0 - src parent; 1 - tgt parent;
1104 * 2 - src child; 3 - tgt child.
1105 * Update on disk version of src child.
1108 * For DNE phase I, only these renames are allowed
1109 * mv src_p/src_c tgt_p/tgt_c
1110 * 1. src_p/src_c/tgt_p/tgt_c are in the same MDT.
1111 * 2. src_p and tgt_p are same directory, and tgt_c does not
1112 * exists. In this case, all of modification will happen
1113 * in the MDT where ithesource parent is, only one remote
1114 * update is needed, i.e. set c_time/m_time on the child.
1115 * And tgt_c will be still in the same MDT as the original
1118 static int mdt_reint_rename(struct mdt_thread_info *info,
1119 struct mdt_lock_handle *lhc)
1121 struct mdt_reint_record *rr = &info->mti_rr;
1122 struct md_attr *ma = &info->mti_attr;
1123 struct ptlrpc_request *req = mdt_info_req(info);
1124 struct mdt_object *msrcdir;
1125 struct mdt_object *mtgtdir;
1126 struct mdt_object *mold;
1127 struct mdt_object *mnew = NULL;
1128 struct mdt_lock_handle *lh_srcdirp;
1129 struct mdt_lock_handle *lh_tgtdirp;
1130 struct mdt_lock_handle *lh_oldp;
1131 struct mdt_lock_handle *lh_newp;
1132 struct lu_fid *old_fid = &info->mti_tmp_fid1;
1133 struct lu_fid *new_fid = &info->mti_tmp_fid2;
1134 struct lustre_handle rename_lh = { 0 };
1135 struct lu_name slname = { 0 };
1136 struct lu_name *lname;
1140 if (info->mti_dlm_req)
1141 ldlm_request_cancel(req, info->mti_dlm_req, 0);
1143 DEBUG_REQ(D_INODE, req, "rename "DFID"/%s to "DFID"/%s",
1144 PFID(rr->rr_fid1), rr->rr_name,
1145 PFID(rr->rr_fid2), rr->rr_tgt);
1147 if (fid_is_obf(rr->rr_fid1) || fid_is_dot_lustre(rr->rr_fid1) ||
1148 fid_is_obf(rr->rr_fid2) || fid_is_dot_lustre(rr->rr_fid2))
1151 rc = mdt_rename_lock(info, &rename_lh);
1153 CERROR("Can't lock FS for rename, rc %d\n", rc);
1157 lh_newp = &info->mti_lh[MDT_LH_NEW];
1159 /* step 1: lock the source dir. */
1160 lh_srcdirp = &info->mti_lh[MDT_LH_PARENT];
1161 mdt_lock_pdo_init(lh_srcdirp, LCK_PW, rr->rr_name,
1163 msrcdir = mdt_object_find_lock(info, rr->rr_fid1, lh_srcdirp,
1164 MDS_INODELOCK_UPDATE);
1165 if (IS_ERR(msrcdir))
1166 GOTO(out_rename_lock, rc = PTR_ERR(msrcdir));
1168 rc = mdt_version_get_check_save(info, msrcdir, 0);
1170 GOTO(out_unlock_source, rc);
1172 /* step 2: find & lock the target dir. */
1173 lh_tgtdirp = &info->mti_lh[MDT_LH_CHILD];
1174 mdt_lock_pdo_init(lh_tgtdirp, LCK_PW, rr->rr_tgt,
1176 if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) {
1177 mdt_object_get(info->mti_env, msrcdir);
1179 if (lh_tgtdirp->mlh_pdo_hash != lh_srcdirp->mlh_pdo_hash) {
1180 rc = mdt_pdir_hash_lock(info, lh_tgtdirp, mtgtdir,
1181 MDS_INODELOCK_UPDATE);
1183 GOTO(out_unlock_source, rc);
1184 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK2, 10);
1187 mtgtdir = mdt_object_find(info->mti_env, info->mti_mdt,
1189 if (IS_ERR(mtgtdir))
1190 GOTO(out_unlock_source, rc = PTR_ERR(mtgtdir));
1192 /* check early, the real version will be saved after locking */
1193 rc = mdt_version_get_check(info, mtgtdir, 1);
1195 GOTO(out_put_target, rc);
1197 if (unlikely(mdt_object_remote(mtgtdir))) {
1198 CDEBUG(D_INFO, "Source dir "DFID" target dir "DFID
1199 "on different MDTs\n", PFID(rr->rr_fid1),
1201 GOTO(out_put_target, rc = -EXDEV);
1203 if (likely(mdt_object_exists(mtgtdir))) {
1204 /* we lock the target dir if it is local */
1205 rc = mdt_object_lock(info, mtgtdir, lh_tgtdirp,
1206 MDS_INODELOCK_UPDATE,
1209 GOTO(out_put_target, rc);
1210 /* get and save correct version after locking */
1211 mdt_version_get_save(info, mtgtdir, 1);
1213 GOTO(out_put_target, rc = -ESTALE);
1218 /* step 3: find & lock the old object. */
1219 lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
1220 mdt_name_copy(&slname, lname);
1222 rc = mdt_lookup_version_check(info, msrcdir, &slname, old_fid, 2);
1224 GOTO(out_unlock_target, rc);
1226 if (lu_fid_eq(old_fid, rr->rr_fid1) || lu_fid_eq(old_fid, rr->rr_fid2))
1227 GOTO(out_unlock_target, rc = -EINVAL);
1229 if (fid_is_obf(old_fid) || fid_is_dot_lustre(old_fid))
1230 GOTO(out_unlock_target, rc = -EPERM);
1232 mold = mdt_object_find(info->mti_env, info->mti_mdt, old_fid);
1234 GOTO(out_unlock_target, rc = PTR_ERR(mold));
1236 lh_oldp = &info->mti_lh[MDT_LH_OLD];
1237 mdt_lock_reg_init(lh_oldp, LCK_EX);
1238 rc = mdt_object_lock(info, mold, lh_oldp, MDS_INODELOCK_LOOKUP,
1241 mdt_object_put(info->mti_env, mold);
1242 GOTO(out_unlock_target, rc);
1245 info->mti_mos = mold;
1246 /* save version after locking */
1247 mdt_version_get_save(info, mold, 2);
1248 mdt_set_capainfo(info, 2, old_fid, BYPASS_CAPA);
1250 /* step 4: find & lock the new object. */
1251 /* new target object may not exist now */
1252 lname = mdt_name(info->mti_env, (char *)rr->rr_tgt, rr->rr_tgtlen);
1253 /* lookup with version checking */
1255 rc = mdt_lookup_version_check(info, mtgtdir, lname, new_fid, 3);
1257 /* the new_fid should have been filled at this moment */
1258 if (lu_fid_eq(old_fid, new_fid))
1259 GOTO(out_unlock_old, rc);
1261 if (lu_fid_eq(new_fid, rr->rr_fid1) ||
1262 lu_fid_eq(new_fid, rr->rr_fid2))
1263 GOTO(out_unlock_old, rc = -EINVAL);
1265 if (fid_is_obf(new_fid) || fid_is_dot_lustre(new_fid))
1266 GOTO(out_unlock_old, rc = -EPERM);
1268 if (mdt_object_remote(mold)) {
1269 CDEBUG(D_INFO, "Src child "DFID" is on another MDT\n",
1271 GOTO(out_unlock_old, rc = -EXDEV);
1274 mdt_lock_reg_init(lh_newp, LCK_EX);
1275 mnew = mdt_object_find(info->mti_env, info->mti_mdt, new_fid);
1277 GOTO(out_unlock_old, rc = PTR_ERR(mnew));
1279 if (mdt_object_remote(mnew)) {
1280 mdt_object_put(info->mti_env, mnew);
1281 CDEBUG(D_INFO, "src child "DFID" is on another MDT\n",
1283 GOTO(out_unlock_old, rc = -EXDEV);
1286 rc = mdt_object_lock(info, mnew, lh_newp,
1287 MDS_INODELOCK_FULL, MDT_CROSS_LOCK);
1289 mdt_object_put(info->mti_env, mnew);
1290 GOTO(out_unlock_old, rc);
1292 /* get and save version after locking */
1293 mdt_version_get_save(info, mnew, 3);
1294 mdt_set_capainfo(info, 3, new_fid, BYPASS_CAPA);
1295 } else if (rc != -EREMOTE && rc != -ENOENT) {
1296 GOTO(out_unlock_old, rc);
1298 mdt_enoent_version_save(info, 3);
1301 /* step 5: rename it */
1302 mdt_reint_init_ma(info, ma);
1304 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
1305 OBD_FAIL_MDS_REINT_RENAME_WRITE);
1308 /* Check if @dst is subdir of @src. */
1309 rc = mdt_rename_sanity(info, old_fid);
1311 GOTO(out_unlock_new, rc);
1313 rc = mdo_rename(info->mti_env, mdt_object_child(msrcdir),
1314 mdt_object_child(mtgtdir), old_fid, &slname,
1315 (mnew ? mdt_object_child(mnew) : NULL),
1318 /* handle last link of tgt object */
1320 mdt_counter_incr(req, LPROC_MDT_RENAME);
1322 mdt_handle_last_unlink(info, mnew, ma);
1324 mdt_rename_counter_tally(info, info->mti_mdt, req,
1331 mdt_object_unlock_put(info, mnew, lh_newp, rc);
1333 mdt_object_unlock_put(info, mold, lh_oldp, rc);
1335 mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc);
1337 mdt_object_put(info->mti_env, mtgtdir);
1339 mdt_object_unlock_put(info, msrcdir, lh_srcdirp, rc);
1341 if (lustre_handle_is_used(&rename_lh))
1342 mdt_rename_unlock(&rename_lh);
1346 typedef int (*mdt_reinter)(struct mdt_thread_info *info,
1347 struct mdt_lock_handle *lhc);
1349 static mdt_reinter reinters[REINT_MAX] = {
1350 [REINT_SETATTR] = mdt_reint_setattr,
1351 [REINT_CREATE] = mdt_reint_create,
1352 [REINT_LINK] = mdt_reint_link,
1353 [REINT_UNLINK] = mdt_reint_unlink,
1354 [REINT_RENAME] = mdt_reint_rename,
1355 [REINT_OPEN] = mdt_reint_open,
1356 [REINT_SETXATTR] = mdt_reint_setxattr,
1357 [REINT_RMENTRY] = mdt_reint_unlink
1360 int mdt_reint_rec(struct mdt_thread_info *info,
1361 struct mdt_lock_handle *lhc)
1366 rc = reinters[info->mti_rr.rr_opcode](info, lhc);