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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/mdt/mdt_reint.c
34 * Lustre Metadata Target (mdt) reintegration routines
36 * Author: Peter Braam <braam@clusterfs.com>
37 * Author: Andreas Dilger <adilger@clusterfs.com>
38 * Author: Phil Schwan <phil@clusterfs.com>
39 * Author: Huang Hua <huanghua@clusterfs.com>
40 * Author: Yury Umanets <umka@clusterfs.com>
43 #define DEBUG_SUBSYSTEM S_MDS
45 #include <lprocfs_status.h>
46 #include "mdt_internal.h"
47 #include <lustre_lmv.h>
49 static inline void mdt_reint_init_ma(struct mdt_thread_info *info,
52 ma->ma_need = MA_INODE;
57 * Get version of object by fid.
59 * Return real version or ENOENT_VERSION if object doesn't exist
61 static void mdt_obj_version_get(struct mdt_thread_info *info,
62 struct mdt_object *o, __u64 *version)
66 if (mdt_object_exists(o) && !mdt_object_remote(o) &&
67 !fid_is_obf(mdt_object_fid(o)))
68 *version = dt_version_get(info->mti_env, mdt_obj2dt(o));
70 *version = ENOENT_VERSION;
71 CDEBUG(D_INODE, "FID "DFID" version is %#llx\n",
72 PFID(mdt_object_fid(o)), *version);
76 * Check version is correct.
78 * Should be called only during replay.
80 static int mdt_version_check(struct ptlrpc_request *req,
81 __u64 version, int idx)
83 __u64 *pre_ver = lustre_msg_get_versions(req->rq_reqmsg);
86 if (!exp_connect_vbr(req->rq_export))
89 LASSERT(req_is_replay(req));
90 /** VBR: version is checked always because costs nothing */
91 LASSERT(idx < PTLRPC_NUM_VERSIONS);
92 /** Sanity check for malformed buffers */
93 if (pre_ver == NULL) {
94 CERROR("No versions in request buffer\n");
95 spin_lock(&req->rq_export->exp_lock);
96 req->rq_export->exp_vbr_failed = 1;
97 spin_unlock(&req->rq_export->exp_lock);
99 } else if (pre_ver[idx] != version) {
100 CDEBUG(D_INODE, "Version mismatch %#llx != %#llx\n",
101 pre_ver[idx], version);
102 spin_lock(&req->rq_export->exp_lock);
103 req->rq_export->exp_vbr_failed = 1;
104 spin_unlock(&req->rq_export->exp_lock);
111 * Save pre-versions in reply.
113 static void mdt_version_save(struct ptlrpc_request *req, __u64 version,
118 if (!exp_connect_vbr(req->rq_export))
121 LASSERT(!req_is_replay(req));
122 LASSERT(req->rq_repmsg != NULL);
123 reply_ver = lustre_msg_get_versions(req->rq_repmsg);
125 reply_ver[idx] = version;
129 * Save enoent version, it is needed when it is obvious that object doesn't
130 * exist, e.g. child during create.
132 static void mdt_enoent_version_save(struct mdt_thread_info *info, int idx)
134 /* save version of file name for replay, it must be ENOENT here */
135 if (!req_is_replay(mdt_info_req(info))) {
136 info->mti_ver[idx] = ENOENT_VERSION;
137 mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx);
142 * Get version from disk and save in reply buffer.
144 * Versions are saved in reply only during normal operations not replays.
146 void mdt_version_get_save(struct mdt_thread_info *info,
147 struct mdt_object *mto, int idx)
149 /* don't save versions during replay */
150 if (!req_is_replay(mdt_info_req(info))) {
151 mdt_obj_version_get(info, mto, &info->mti_ver[idx]);
152 mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx);
157 * Get version from disk and check it, no save in reply.
159 int mdt_version_get_check(struct mdt_thread_info *info,
160 struct mdt_object *mto, int idx)
162 /* only check versions during replay */
163 if (!req_is_replay(mdt_info_req(info)))
166 mdt_obj_version_get(info, mto, &info->mti_ver[idx]);
167 return mdt_version_check(mdt_info_req(info), info->mti_ver[idx], idx);
171 * Get version from disk and check if recovery or just save.
173 int mdt_version_get_check_save(struct mdt_thread_info *info,
174 struct mdt_object *mto, int idx)
178 mdt_obj_version_get(info, mto, &info->mti_ver[idx]);
179 if (req_is_replay(mdt_info_req(info)))
180 rc = mdt_version_check(mdt_info_req(info), info->mti_ver[idx],
183 mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx);
188 * Lookup with version checking.
190 * This checks version of 'name'. Many reint functions uses 'name' for child not
191 * FID, therefore we need to get object by name and check its version.
193 static int mdt_lookup_version_check(struct mdt_thread_info *info,
194 struct mdt_object *p,
195 const struct lu_name *lname,
196 struct lu_fid *fid, int idx)
200 rc = mdo_lookup(info->mti_env, mdt_object_child(p), lname, fid,
202 /* Check version only during replay */
203 if (!req_is_replay(mdt_info_req(info)))
206 info->mti_ver[idx] = ENOENT_VERSION;
208 struct mdt_object *child;
209 child = mdt_object_find(info->mti_env, info->mti_mdt, fid);
210 if (likely(!IS_ERR(child))) {
211 mdt_obj_version_get(info, child, &info->mti_ver[idx]);
212 mdt_object_put(info->mti_env, child);
215 vbrc = mdt_version_check(mdt_info_req(info), info->mti_ver[idx], idx);
216 return vbrc ? vbrc : rc;
220 static int mdt_unlock_slaves(struct mdt_thread_info *mti,
221 struct mdt_object *obj,
222 struct ldlm_enqueue_info *einfo,
225 union ldlm_policy_data *policy = &mti->mti_policy;
226 struct mdt_lock_handle *lh = &mti->mti_lh[MDT_LH_LOCAL];
227 struct lustre_handle_array *slave_locks = einfo->ei_cbdata;
230 LASSERT(S_ISDIR(obj->mot_header.loh_attr));
231 LASSERT(slave_locks);
233 memset(policy, 0, sizeof(*policy));
234 policy->l_inodebits.bits = einfo->ei_inodebits;
235 mdt_lock_handle_init(lh);
236 mdt_lock_reg_init(lh, einfo->ei_mode);
237 for (i = 0; i < slave_locks->ha_count; i++) {
238 if (test_bit(i, (void *)slave_locks->ha_map))
239 lh->mlh_rreg_lh = slave_locks->ha_handles[i];
241 lh->mlh_reg_lh = slave_locks->ha_handles[i];
242 mdt_object_unlock(mti, NULL, lh, decref);
243 slave_locks->ha_handles[i].cookie = 0ull;
246 return mo_object_unlock(mti->mti_env, mdt_object_child(obj), einfo,
250 static inline int mdt_object_striped(struct mdt_thread_info *mti,
251 struct mdt_object *obj)
253 struct lu_device *bottom_dev;
254 struct lu_object *bottom_obj;
257 if (!S_ISDIR(obj->mot_header.loh_attr))
260 /* getxattr from bottom obj to avoid reading in shard FIDs */
261 bottom_dev = dt2lu_dev(mti->mti_mdt->mdt_bottom);
262 bottom_obj = lu_object_find_slice(mti->mti_env, bottom_dev,
263 mdt_object_fid(obj), NULL);
264 if (IS_ERR(bottom_obj))
265 return PTR_ERR(bottom_obj);
267 rc = dt_xattr_get(mti->mti_env, lu2dt(bottom_obj), &LU_BUF_NULL,
269 lu_object_put(mti->mti_env, bottom_obj);
271 return (rc > 0) ? 1 : (rc == -ENODATA) ? 0 : rc;
275 * Lock slave stripes if necessary, the lock handles of slave stripes
276 * will be stored in einfo->ei_cbdata.
278 static int mdt_lock_slaves(struct mdt_thread_info *mti, struct mdt_object *obj,
279 enum ldlm_mode mode, __u64 ibits,
280 struct ldlm_enqueue_info *einfo)
282 union ldlm_policy_data *policy = &mti->mti_policy;
284 LASSERT(S_ISDIR(obj->mot_header.loh_attr));
286 einfo->ei_type = LDLM_IBITS;
287 einfo->ei_mode = mode;
288 einfo->ei_cb_bl = mdt_remote_blocking_ast;
289 einfo->ei_cb_local_bl = mdt_blocking_ast;
290 einfo->ei_cb_cp = ldlm_completion_ast;
291 einfo->ei_enq_slave = 1;
292 einfo->ei_namespace = mti->mti_mdt->mdt_namespace;
293 einfo->ei_inodebits = ibits;
294 memset(policy, 0, sizeof(*policy));
295 policy->l_inodebits.bits = ibits;
297 return mo_object_lock(mti->mti_env, mdt_object_child(obj), NULL, einfo,
301 int mdt_reint_striped_lock(struct mdt_thread_info *info,
302 struct mdt_object *o,
303 struct mdt_lock_handle *lh,
305 struct ldlm_enqueue_info *einfo,
310 LASSERT(!mdt_object_remote(o));
312 memset(einfo, 0, sizeof(*einfo));
314 rc = mdt_reint_object_lock(info, o, lh, ibits, cos_incompat);
318 rc = mdt_object_striped(info, o);
321 mdt_object_unlock(info, o, lh, rc);
325 rc = mdt_lock_slaves(info, o, lh->mlh_reg_mode, ibits, einfo);
327 mdt_object_unlock(info, o, lh, rc);
328 if (rc == -EIO && OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_NAME))
335 void mdt_reint_striped_unlock(struct mdt_thread_info *info,
336 struct mdt_object *o,
337 struct mdt_lock_handle *lh,
338 struct ldlm_enqueue_info *einfo, int decref)
340 if (einfo->ei_cbdata)
341 mdt_unlock_slaves(info, o, einfo, decref);
342 mdt_object_unlock(info, o, lh, decref);
346 * VBR: we save three versions in reply:
347 * 0 - parent. Check that parent version is the same during replay.
348 * 1 - name. Version of 'name' if file exists with the same name or
349 * ENOENT_VERSION, it is needed because file may appear due to missed replays.
350 * 2 - child. Version of child by FID. Must be ENOENT. It is mostly sanity
353 static int mdt_create(struct mdt_thread_info *info)
355 struct mdt_device *mdt = info->mti_mdt;
356 struct mdt_object *parent;
357 struct mdt_object *child;
358 struct mdt_lock_handle *lh;
359 struct mdt_body *repbody;
360 struct md_attr *ma = &info->mti_attr;
361 struct mdt_reint_record *rr = &info->mti_rr;
362 struct md_op_spec *spec = &info->mti_spec;
366 DEBUG_REQ(D_INODE, mdt_info_req(info),
367 "Create ("DNAME"->"DFID") in "DFID,
368 PNAME(&rr->rr_name), PFID(rr->rr_fid2), PFID(rr->rr_fid1));
370 if (!fid_is_md_operative(rr->rr_fid1))
373 if (S_ISDIR(ma->ma_attr.la_mode) &&
374 spec->u.sp_ea.eadata != NULL && spec->u.sp_ea.eadatalen != 0) {
375 const struct lmv_user_md *lum = spec->u.sp_ea.eadata;
376 struct lu_ucred *uc = mdt_ucred(info);
377 struct obd_export *exp = mdt_info_req(info)->rq_export;
379 /* Only new clients can create remote dir( >= 2.4) and
380 * striped dir(>= 2.6), old client will return -ENOTSUPP */
381 if (!mdt_is_dne_client(exp))
384 if (le32_to_cpu(lum->lum_stripe_count) > 1) {
385 if (!mdt_is_striped_client(exp))
388 if (!mdt->mdt_enable_striped_dir)
390 } else if (!mdt->mdt_enable_remote_dir) {
394 if (!md_capable(uc, CFS_CAP_SYS_ADMIN) &&
395 uc->uc_gid != mdt->mdt_enable_remote_dir_gid &&
396 mdt->mdt_enable_remote_dir_gid != -1)
400 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
402 parent = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
404 RETURN(PTR_ERR(parent));
406 if (!mdt_object_exists(parent))
407 GOTO(put_parent, rc = -ENOENT);
409 lh = &info->mti_lh[MDT_LH_PARENT];
410 mdt_lock_pdo_init(lh, LCK_PW, &rr->rr_name);
411 rc = mdt_object_lock(info, parent, lh, MDS_INODELOCK_UPDATE);
413 GOTO(put_parent, rc);
415 if (!mdt_object_remote(parent)) {
416 rc = mdt_version_get_check_save(info, parent, 0);
418 GOTO(unlock_parent, rc);
422 * Check child name version during replay.
423 * During create replay a file may exist with same name.
425 rc = mdt_lookup_version_check(info, parent, &rr->rr_name,
426 &info->mti_tmp_fid1, 1);
428 GOTO(unlock_parent, rc = -EEXIST);
430 /* -ENOENT is expected here */
432 GOTO(unlock_parent, rc);
434 /* save version of file name for replay, it must be ENOENT here */
435 mdt_enoent_version_save(info, 1);
437 child = mdt_object_new(info->mti_env, mdt, rr->rr_fid2);
438 if (unlikely(IS_ERR(child)))
439 GOTO(unlock_parent, rc = PTR_ERR(child));
441 ma->ma_need = MA_INODE;
444 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
445 OBD_FAIL_MDS_REINT_CREATE_WRITE);
447 /* Version of child will be updated on disk. */
448 tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(child));
449 rc = mdt_version_get_check_save(info, child, 2);
453 /* Let lower layer know current lock mode. */
454 info->mti_spec.sp_cr_mode = mdt_dlm_mode2mdl_mode(lh->mlh_pdo_mode);
457 * Do not perform lookup sanity check. We know that name does
460 info->mti_spec.sp_cr_lookup = 0;
461 info->mti_spec.sp_feat = &dt_directory_features;
463 rc = mdo_create(info->mti_env, mdt_object_child(parent), &rr->rr_name,
464 mdt_object_child(child), &info->mti_spec, ma);
466 rc = mdt_attr_get_complex(info, child, ma);
472 * On DNE, we need to eliminate dependey between 'mkdir a' and
473 * 'mkdir a/b' if b is a striped directory, to achieve this, two
474 * things are done below:
475 * 1. save child and slaves lock.
476 * 2. if the child is a striped directory, relock parent so to
477 * compare against with COS locks to ensure parent was
480 if (mdt_slc_is_enabled(mdt) && S_ISDIR(ma->ma_attr.la_mode)) {
481 struct mdt_lock_handle *lhc;
482 struct ldlm_enqueue_info *einfo = &info->mti_einfo[0];
485 rc = mdt_object_striped(info, child);
491 if (!mdt_object_remote(parent)) {
492 mdt_object_unlock(info, parent, lh, 1);
493 mdt_lock_pdo_init(lh, LCK_PW, &rr->rr_name);
494 rc = mdt_reint_object_lock(info, parent, lh,
495 MDS_INODELOCK_UPDATE,
502 lhc = &info->mti_lh[MDT_LH_CHILD];
503 mdt_lock_handle_init(lhc);
504 mdt_lock_reg_init(lhc, LCK_PW);
505 rc = mdt_reint_striped_lock(info, child, lhc,
506 MDS_INODELOCK_UPDATE, einfo,
511 mdt_reint_striped_unlock(info, child, lhc, einfo, rc);
514 /* Return fid & attr to client. */
515 if (ma->ma_valid & MA_INODE)
516 mdt_pack_attr2body(info, repbody, &ma->ma_attr,
517 mdt_object_fid(child));
519 mdt_object_put(info->mti_env, child);
521 mdt_object_unlock(info, parent, lh, rc);
523 mdt_object_put(info->mti_env, parent);
527 static int mdt_attr_set(struct mdt_thread_info *info, struct mdt_object *mo,
530 struct mdt_lock_handle *lh;
531 int do_vbr = ma->ma_attr.la_valid &
532 (LA_MODE | LA_UID | LA_GID | LA_PROJID | LA_FLAGS);
533 __u64 lockpart = MDS_INODELOCK_UPDATE;
534 struct ldlm_enqueue_info *einfo = &info->mti_einfo[0];
539 rc = mdt_object_striped(info, mo);
545 lh = &info->mti_lh[MDT_LH_PARENT];
546 mdt_lock_reg_init(lh, LCK_PW);
548 /* Even though the new MDT will grant PERM lock to the old
549 * client, but the old client will almost ignore that during
550 * So it needs to revoke both LOOKUP and PERM lock here, so
551 * both new and old client can cancel the dcache */
552 if (ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID))
553 lockpart |= MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM;
555 rc = mdt_reint_striped_lock(info, mo, lh, lockpart, einfo,
560 /* all attrs are packed into mti_attr in unpack_setattr */
561 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
562 OBD_FAIL_MDS_REINT_SETATTR_WRITE);
564 /* VBR: update version if attr changed are important for recovery */
566 /* update on-disk version of changed object */
567 tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(mo));
568 rc = mdt_version_get_check_save(info, mo, 0);
570 GOTO(out_unlock, rc);
573 /* Ensure constant striping during chown(). See LU-2789. */
574 if (ma->ma_attr.la_valid & (LA_UID|LA_GID|LA_PROJID))
575 mutex_lock(&mo->mot_lov_mutex);
577 /* all attrs are packed into mti_attr in unpack_setattr */
578 rc = mo_attr_set(info->mti_env, mdt_object_child(mo), ma);
580 if (ma->ma_attr.la_valid & (LA_UID|LA_GID|LA_PROJID))
581 mutex_unlock(&mo->mot_lov_mutex);
584 GOTO(out_unlock, rc);
585 mdt_dom_obj_lvb_update(info->mti_env, mo, false);
588 mdt_reint_striped_unlock(info, mo, lh, einfo, rc);
593 * Check HSM flags and add HS_DIRTY flag if relevant.
595 * A file could be set dirty only if it has a copy in the backend (HS_EXISTS)
596 * and is not RELEASED.
598 int mdt_add_dirty_flag(struct mdt_thread_info *info, struct mdt_object *mo,
601 struct lu_ucred *uc = mdt_ucred(info);
606 /* If the file was modified, add the dirty flag */
607 ma->ma_need = MA_HSM;
608 rc = mdt_attr_get_complex(info, mo, ma);
610 CERROR("file attribute read error for "DFID": %d.\n",
611 PFID(mdt_object_fid(mo)), rc);
615 /* If an up2date copy exists in the backend, add dirty flag */
616 if ((ma->ma_valid & MA_HSM) && (ma->ma_hsm.mh_flags & HS_EXISTS)
617 && !(ma->ma_hsm.mh_flags & (HS_DIRTY|HS_RELEASED))) {
618 ma->ma_hsm.mh_flags |= HS_DIRTY;
620 /* Bump cap so that closes from non-owner writers can
621 * set the HSM state to dirty. */
622 cap_saved = uc->uc_cap;
623 uc->uc_cap |= MD_CAP_TO_MASK(CFS_CAP_FOWNER);
624 rc = mdt_hsm_attr_set(info, mo, &ma->ma_hsm);
625 uc->uc_cap = cap_saved;
627 CERROR("file attribute change error for "DFID": %d\n",
628 PFID(mdt_object_fid(mo)), rc);
634 static int mdt_reint_setattr(struct mdt_thread_info *info,
635 struct mdt_lock_handle *lhc)
637 struct mdt_device *mdt = info->mti_mdt;
638 struct md_attr *ma = &info->mti_attr;
639 struct mdt_reint_record *rr = &info->mti_rr;
640 struct ptlrpc_request *req = mdt_info_req(info);
641 struct mdt_object *mo;
642 struct mdt_body *repbody;
646 DEBUG_REQ(D_INODE, req, "setattr "DFID" %x", PFID(rr->rr_fid1),
647 (unsigned int)ma->ma_attr.la_valid);
649 if (info->mti_dlm_req)
650 ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP);
652 OBD_RACE(OBD_FAIL_PTLRPC_RESEND_RACE);
654 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
655 mo = mdt_object_find(info->mti_env, mdt, rr->rr_fid1);
657 GOTO(out, rc = PTR_ERR(mo));
659 if (!mdt_object_exists(mo))
660 GOTO(out_put, rc = -ENOENT);
662 if (mdt_object_remote(mo))
663 GOTO(out_put, rc = -EREMOTE);
665 ma->ma_enable_chprojid_gid = mdt->mdt_enable_chprojid_gid;
666 /* revoke lease lock if size is going to be changed */
667 if (unlikely(ma->ma_attr.la_valid & LA_SIZE &&
668 !(ma->ma_attr_flags & MDS_TRUNC_KEEP_LEASE) &&
669 atomic_read(&mo->mot_lease_count) > 0)) {
670 down_read(&mo->mot_open_sem);
672 if (atomic_read(&mo->mot_lease_count) > 0) { /* lease exists */
673 lhc = &info->mti_lh[MDT_LH_LOCAL];
674 mdt_lock_reg_init(lhc, LCK_CW);
676 rc = mdt_object_lock(info, mo, lhc, MDS_INODELOCK_OPEN);
678 up_read(&mo->mot_open_sem);
682 /* revoke lease lock */
683 mdt_object_unlock(info, mo, lhc, 1);
685 up_read(&mo->mot_open_sem);
688 if (ma->ma_attr.la_valid & LA_SIZE || rr->rr_flags & MRF_OPEN_TRUNC) {
689 /* Check write access for the O_TRUNC case */
690 if (mdt_write_read(mo) < 0)
691 GOTO(out_put, rc = -ETXTBSY);
693 /* LU-10286: compatibility check for FLR.
694 * Please check the comment in mdt_finish_open() for details */
695 if (!exp_connect_flr(info->mti_exp) ||
696 !exp_connect_overstriping(info->mti_exp)) {
697 rc = mdt_big_xattr_get(info, mo, XATTR_NAME_LOV);
698 if (rc < 0 && rc != -ENODATA)
701 if (!exp_connect_flr(info->mti_exp)) {
703 mdt_lmm_is_flr(info->mti_big_lmm))
704 GOTO(out_put, rc = -EOPNOTSUPP);
707 if (!exp_connect_overstriping(info->mti_exp)) {
709 mdt_lmm_is_overstriping(info->mti_big_lmm))
710 GOTO(out_put, rc = -EOPNOTSUPP);
714 /* For truncate, the file size sent from client
715 * is believable, but the blocks are incorrect,
716 * which makes the block size in LSOM attribute
717 * inconsisent with the real block size.
719 rc = mdt_lsom_update(info, mo, true);
724 if ((ma->ma_valid & MA_INODE) && ma->ma_attr.la_valid) {
725 if (ma->ma_valid & MA_LOV)
726 GOTO(out_put, rc = -EPROTO);
728 /* MDT supports FMD for regular files due to Data-on-MDT */
729 if (S_ISREG(lu_object_attr(&mo->mot_obj)) &&
730 ma->ma_attr.la_valid & (LA_ATIME | LA_MTIME | LA_CTIME))
731 tgt_fmd_update(info->mti_exp, mdt_object_fid(mo),
734 rc = mdt_attr_set(info, mo, ma);
737 } else if ((ma->ma_valid & (MA_LOV | MA_LMV)) &&
738 (ma->ma_valid & MA_INODE)) {
739 struct lu_buf *buf = &info->mti_buf;
740 struct lu_ucred *uc = mdt_ucred(info);
741 struct mdt_lock_handle *lh;
743 __u64 lockpart = MDS_INODELOCK_XATTR;
745 /* reject if either remote or striped dir is disabled */
746 if (ma->ma_valid & MA_LMV) {
747 if (!mdt->mdt_enable_remote_dir ||
748 !mdt->mdt_enable_striped_dir)
749 GOTO(out_put, rc = -EPERM);
751 if (!md_capable(uc, CFS_CAP_SYS_ADMIN) &&
752 uc->uc_gid != mdt->mdt_enable_remote_dir_gid &&
753 mdt->mdt_enable_remote_dir_gid != -1)
754 GOTO(out_put, rc = -EPERM);
757 if (!S_ISDIR(lu_object_attr(&mo->mot_obj)))
758 GOTO(out_put, rc = -ENOTDIR);
760 if (ma->ma_attr.la_valid != 0)
761 GOTO(out_put, rc = -EPROTO);
763 if (ma->ma_valid & MA_LOV) {
764 buf->lb_buf = ma->ma_lmm;
765 buf->lb_len = ma->ma_lmm_size;
766 name = XATTR_NAME_LOV;
768 struct lmv_user_md *lmu = &ma->ma_lmv->lmv_user_md;
771 buf->lb_len = ma->ma_lmv_size;
772 name = XATTR_NAME_DEFAULT_LMV;
773 /* force client to update dir default layout */
774 lockpart |= MDS_INODELOCK_LOOKUP;
777 lh = &info->mti_lh[MDT_LH_PARENT];
778 mdt_lock_reg_init(lh, LCK_PW);
780 rc = mdt_object_lock(info, mo, lh, lockpart);
784 rc = mo_xattr_set(info->mti_env, mdt_object_child(mo), buf,
787 mdt_object_unlock(info, mo, lh, rc);
791 GOTO(out_put, rc = -EPROTO);
794 /* If file data is modified, add the dirty flag */
795 if (ma->ma_attr_flags & MDS_DATA_MODIFIED)
796 rc = mdt_add_dirty_flag(info, mo, ma);
798 ma->ma_need = MA_INODE;
800 rc = mdt_attr_get_complex(info, mo, ma);
804 mdt_pack_attr2body(info, repbody, &ma->ma_attr, mdt_object_fid(mo));
808 mdt_object_put(info->mti_env, mo);
811 mdt_counter_incr(req, LPROC_MDT_SETATTR);
813 mdt_client_compatibility(info);
814 rc2 = mdt_fix_reply(info);
820 static int mdt_reint_create(struct mdt_thread_info *info,
821 struct mdt_lock_handle *lhc)
823 struct ptlrpc_request *req = mdt_info_req(info);
827 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
828 RETURN(err_serious(-ESTALE));
830 if (info->mti_dlm_req)
831 ldlm_request_cancel(mdt_info_req(info),
832 info->mti_dlm_req, 0, LATF_SKIP);
834 if (!lu_name_is_valid(&info->mti_rr.rr_name))
837 switch (info->mti_attr.ma_attr.la_mode & S_IFMT) {
839 mdt_counter_incr(req, LPROC_MDT_MKDIR);
847 /* Special file should stay on the same node as parent. */
848 mdt_counter_incr(req, LPROC_MDT_MKNOD);
851 CERROR("%s: Unsupported mode %o\n",
852 mdt_obd_name(info->mti_mdt),
853 info->mti_attr.ma_attr.la_mode);
854 RETURN(err_serious(-EOPNOTSUPP));
857 rc = mdt_create(info);
862 * VBR: save parent version in reply and child version getting by its name.
863 * Version of child is getting and checking during its lookup. If
865 static int mdt_reint_unlink(struct mdt_thread_info *info,
866 struct mdt_lock_handle *lhc)
868 struct mdt_reint_record *rr = &info->mti_rr;
869 struct ptlrpc_request *req = mdt_info_req(info);
870 struct md_attr *ma = &info->mti_attr;
871 struct lu_fid *child_fid = &info->mti_tmp_fid1;
872 struct mdt_object *mp;
873 struct mdt_object *mc;
874 struct mdt_lock_handle *parent_lh;
875 struct mdt_lock_handle *child_lh;
876 struct ldlm_enqueue_info *einfo = &info->mti_einfo[0];
878 bool cos_incompat = false;
884 DEBUG_REQ(D_INODE, req, "unlink "DFID"/"DNAME"", PFID(rr->rr_fid1),
885 PNAME(&rr->rr_name));
887 if (info->mti_dlm_req)
888 ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP);
890 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
891 RETURN(err_serious(-ENOENT));
893 if (!fid_is_md_operative(rr->rr_fid1))
896 mp = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
900 if (mdt_object_remote(mp)) {
903 rc = mdt_version_get_check_save(info, mp, 0);
905 GOTO(put_parent, rc);
909 parent_lh = &info->mti_lh[MDT_LH_PARENT];
910 mdt_lock_pdo_init(parent_lh, LCK_PW, &rr->rr_name);
911 rc = mdt_reint_object_lock(info, mp, parent_lh, MDS_INODELOCK_UPDATE,
914 GOTO(put_parent, rc);
916 /* lookup child object along with version checking */
918 rc = mdt_lookup_version_check(info, mp, &rr->rr_name, child_fid, 1);
920 /* Name might not be able to find during resend of
921 * remote unlink, considering following case.
922 * dir_A is a remote directory, the name entry of
923 * dir_A is on MDT0, the directory is on MDT1,
925 * 1. client sends unlink req to MDT1.
926 * 2. MDT1 sends name delete update to MDT0.
927 * 3. name entry is being deleted in MDT0 synchronously.
928 * 4. MDT1 is restarted.
929 * 5. client resends unlink req to MDT1. So it can not
930 * find the name entry on MDT0 anymore.
931 * In this case, MDT1 only needs to destory the local
934 if (mdt_object_remote(mp) && rc == -ENOENT &&
935 !fid_is_zero(rr->rr_fid2) &&
936 lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) {
938 *child_fid = *rr->rr_fid2;
940 GOTO(unlock_parent, rc);
944 if (!fid_is_md_operative(child_fid))
945 GOTO(unlock_parent, rc = -EPERM);
947 /* We will lock the child regardless it is local or remote. No harm. */
948 mc = mdt_object_find(info->mti_env, info->mti_mdt, child_fid);
950 GOTO(unlock_parent, rc = PTR_ERR(mc));
953 rc = mdt_object_striped(info, mc);
959 mdt_object_put(info->mti_env, mc);
960 mdt_object_unlock(info, mp, parent_lh, -EAGAIN);
965 child_lh = &info->mti_lh[MDT_LH_CHILD];
966 mdt_lock_reg_init(child_lh, LCK_EX);
967 if (info->mti_spec.sp_rm_entry) {
968 struct lu_ucred *uc = mdt_ucred(info);
970 if (!mdt_is_dne_client(req->rq_export))
971 /* Return -ENOTSUPP for old client */
972 GOTO(put_child, rc = -ENOTSUPP);
974 if (!md_capable(uc, CFS_CAP_SYS_ADMIN))
975 GOTO(put_child, rc = -EPERM);
977 ma->ma_need = MA_INODE;
979 rc = mdo_unlink(info->mti_env, mdt_object_child(mp),
980 NULL, &rr->rr_name, ma, no_name);
984 if (mdt_object_remote(mc)) {
985 struct mdt_body *repbody;
987 if (!fid_is_zero(rr->rr_fid2)) {
988 CDEBUG(D_INFO, "%s: name "DNAME" cannot find "DFID"\n",
989 mdt_obd_name(info->mti_mdt),
990 PNAME(&rr->rr_name), PFID(mdt_object_fid(mc)));
991 GOTO(put_child, rc = -ENOENT);
993 CDEBUG(D_INFO, "%s: name "DNAME": "DFID" is on another MDT\n",
994 mdt_obd_name(info->mti_mdt),
995 PNAME(&rr->rr_name), PFID(mdt_object_fid(mc)));
997 if (!mdt_is_dne_client(req->rq_export))
998 /* Return -ENOTSUPP for old client */
999 GOTO(put_child, rc = -ENOTSUPP);
1001 /* Revoke the LOOKUP lock of the remote object granted by
1002 * this MDT. Since the unlink will happen on another MDT,
1003 * it will release the LOOKUP lock right away. Then What
1004 * would happen if another client try to grab the LOOKUP
1005 * lock at the same time with unlink XXX */
1006 mdt_object_lock(info, mc, child_lh, MDS_INODELOCK_LOOKUP);
1007 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1008 LASSERT(repbody != NULL);
1009 repbody->mbo_fid1 = *mdt_object_fid(mc);
1010 repbody->mbo_valid |= (OBD_MD_FLID | OBD_MD_MDS);
1011 GOTO(unlock_child, rc = -EREMOTE);
1013 /* We used to acquire MDS_INODELOCK_FULL here but we can't do
1014 * this now because a running HSM restore on the child (unlink
1015 * victim) will hold the layout lock. See LU-4002. */
1016 lock_ibits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
1017 if (mdt_object_remote(mp)) {
1018 /* Enqueue lookup lock from parent MDT */
1019 rc = mdt_remote_object_lock(info, mp, mdt_object_fid(mc),
1020 &child_lh->mlh_rreg_lh,
1021 child_lh->mlh_rreg_mode,
1022 MDS_INODELOCK_LOOKUP, false);
1024 GOTO(put_child, rc);
1026 lock_ibits &= ~MDS_INODELOCK_LOOKUP;
1029 rc = mdt_reint_striped_lock(info, mc, child_lh, lock_ibits, einfo,
1032 GOTO(put_child, rc);
1035 * Now we can only make sure we need MA_INODE, in mdd layer, will check
1036 * whether need MA_LOV and MA_COOKIE.
1038 ma->ma_need = MA_INODE;
1041 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
1042 OBD_FAIL_MDS_REINT_UNLINK_WRITE);
1043 /* save version when object is locked */
1044 mdt_version_get_save(info, mc, 1);
1046 mutex_lock(&mc->mot_lov_mutex);
1048 rc = mdo_unlink(info->mti_env, mdt_object_child(mp),
1049 mdt_object_child(mc), &rr->rr_name, ma, no_name);
1051 mutex_unlock(&mc->mot_lov_mutex);
1053 GOTO(unlock_child, rc);
1055 if (!lu_object_is_dying(&mc->mot_header)) {
1056 rc = mdt_attr_get_complex(info, mc, ma);
1059 } else if (mdt_dom_check_for_discard(info, mc)) {
1060 mdt_dom_discard_data(info, mc);
1062 mdt_handle_last_unlink(info, mc, ma);
1065 if (ma->ma_valid & MA_INODE) {
1066 switch (ma->ma_attr.la_mode & S_IFMT) {
1068 mdt_counter_incr(req, LPROC_MDT_RMDIR);
1076 mdt_counter_incr(req, LPROC_MDT_UNLINK);
1079 LASSERTF(0, "bad file type %o unlinking\n",
1080 ma->ma_attr.la_mode);
1087 mdt_reint_striped_unlock(info, mc, child_lh, einfo, rc);
1089 mdt_object_put(info->mti_env, mc);
1091 mdt_object_unlock(info, mp, parent_lh, rc);
1093 mdt_object_put(info->mti_env, mp);
1094 CFS_RACE_WAKEUP(OBD_FAIL_OBD_ZERO_NLINK_RACE);
1099 * VBR: save versions in reply: 0 - parent; 1 - child by fid; 2 - target by
1102 static int mdt_reint_link(struct mdt_thread_info *info,
1103 struct mdt_lock_handle *lhc)
1105 struct mdt_reint_record *rr = &info->mti_rr;
1106 struct ptlrpc_request *req = mdt_info_req(info);
1107 struct md_attr *ma = &info->mti_attr;
1108 struct mdt_object *ms;
1109 struct mdt_object *mp;
1110 struct mdt_lock_handle *lhs;
1111 struct mdt_lock_handle *lhp;
1116 DEBUG_REQ(D_INODE, req, "link "DFID" to "DFID"/"DNAME,
1117 PFID(rr->rr_fid1), PFID(rr->rr_fid2), PNAME(&rr->rr_name));
1119 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
1120 RETURN(err_serious(-ENOENT));
1122 if (OBD_FAIL_PRECHECK(OBD_FAIL_PTLRPC_RESEND_RACE)) {
1123 req->rq_no_reply = 1;
1124 RETURN(err_serious(-ENOENT));
1127 if (info->mti_dlm_req)
1128 ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP);
1130 /* Invalid case so return error immediately instead of
1132 if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2))
1135 if (!fid_is_md_operative(rr->rr_fid1) ||
1136 !fid_is_md_operative(rr->rr_fid2))
1139 /* step 1: find target parent dir */
1140 mp = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid2);
1142 RETURN(PTR_ERR(mp));
1144 rc = mdt_version_get_check_save(info, mp, 0);
1146 GOTO(put_parent, rc);
1148 /* step 2: find source */
1149 ms = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
1151 GOTO(put_parent, rc = PTR_ERR(ms));
1153 if (!mdt_object_exists(ms)) {
1154 CDEBUG(D_INFO, "%s: "DFID" does not exist.\n",
1155 mdt_obd_name(info->mti_mdt), PFID(rr->rr_fid1));
1156 GOTO(put_source, rc = -ENOENT);
1159 cos_incompat = (mdt_object_remote(mp) || mdt_object_remote(ms));
1161 lhp = &info->mti_lh[MDT_LH_PARENT];
1162 mdt_lock_pdo_init(lhp, LCK_PW, &rr->rr_name);
1163 rc = mdt_reint_object_lock(info, mp, lhp, MDS_INODELOCK_UPDATE,
1166 GOTO(put_source, rc);
1168 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME3, 5);
1170 lhs = &info->mti_lh[MDT_LH_CHILD];
1171 mdt_lock_reg_init(lhs, LCK_EX);
1172 rc = mdt_reint_object_lock(info, ms, lhs,
1173 MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR,
1176 GOTO(unlock_parent, rc);
1178 /* step 3: link it */
1179 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
1180 OBD_FAIL_MDS_REINT_LINK_WRITE);
1182 tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(ms));
1183 rc = mdt_version_get_check_save(info, ms, 1);
1185 GOTO(unlock_source, rc);
1187 /** check target version by name during replay */
1188 rc = mdt_lookup_version_check(info, mp, &rr->rr_name,
1189 &info->mti_tmp_fid1, 2);
1190 if (rc != 0 && rc != -ENOENT)
1191 GOTO(unlock_source, rc);
1192 /* save version of file name for replay, it must be ENOENT here */
1193 if (!req_is_replay(mdt_info_req(info))) {
1194 if (rc != -ENOENT) {
1195 CDEBUG(D_INFO, "link target "DNAME" existed!\n",
1196 PNAME(&rr->rr_name));
1197 GOTO(unlock_source, rc = -EEXIST);
1199 info->mti_ver[2] = ENOENT_VERSION;
1200 mdt_version_save(mdt_info_req(info), info->mti_ver[2], 2);
1203 rc = mdo_link(info->mti_env, mdt_object_child(mp),
1204 mdt_object_child(ms), &rr->rr_name, ma);
1207 mdt_counter_incr(req, LPROC_MDT_LINK);
1211 mdt_object_unlock(info, ms, lhs, rc);
1213 mdt_object_unlock(info, mp, lhp, rc);
1215 mdt_object_put(info->mti_env, ms);
1217 mdt_object_put(info->mti_env, mp);
1221 * lock the part of the directory according to the hash of the name
1222 * (lh->mlh_pdo_hash) in parallel directory lock.
1224 static int mdt_pdir_hash_lock(struct mdt_thread_info *info,
1225 struct mdt_lock_handle *lh,
1226 struct mdt_object *obj, __u64 ibits,
1229 struct ldlm_res_id *res = &info->mti_res_id;
1230 struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
1231 union ldlm_policy_data *policy = &info->mti_policy;
1232 __u64 dlmflags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB;
1236 * Finish res_id initializing by name hash marking part of
1237 * directory which is taking modification.
1239 LASSERT(lh->mlh_pdo_hash != 0);
1240 fid_build_pdo_res_name(mdt_object_fid(obj), lh->mlh_pdo_hash, res);
1241 memset(policy, 0, sizeof(*policy));
1242 policy->l_inodebits.bits = ibits;
1244 (lh->mlh_reg_mode == LCK_PW || lh->mlh_reg_mode == LCK_EX))
1245 dlmflags |= LDLM_FL_COS_INCOMPAT;
1247 * Use LDLM_FL_LOCAL_ONLY for this lock. We do not know yet if it is
1248 * going to be sent to client. If it is - mdt_intent_policy() path will
1249 * fix it up and turn FL_LOCAL flag off.
1251 rc = mdt_fid_lock(info->mti_env, ns, &lh->mlh_reg_lh, lh->mlh_reg_mode,
1252 policy, res, dlmflags,
1253 &info->mti_exp->exp_handle.h_cookie);
1258 * Get BFL lock for rename or migrate process.
1260 static int mdt_rename_lock(struct mdt_thread_info *info,
1261 struct lustre_handle *lh)
1266 if (mdt_seq_site(info->mti_mdt)->ss_node_id != 0) {
1267 struct lu_fid *fid = &info->mti_tmp_fid1;
1268 struct mdt_object *obj;
1270 /* XXX, right now, it has to use object API to
1271 * enqueue lock cross MDT, so it will enqueue
1272 * rename lock(with LUSTRE_BFL_FID) by root object */
1274 obj = mdt_object_find(info->mti_env, info->mti_mdt, fid);
1276 RETURN(PTR_ERR(obj));
1278 rc = mdt_remote_object_lock(info, obj,
1279 &LUSTRE_BFL_FID, lh,
1281 MDS_INODELOCK_UPDATE, false);
1282 mdt_object_put(info->mti_env, obj);
1284 struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
1285 union ldlm_policy_data *policy = &info->mti_policy;
1286 struct ldlm_res_id *res_id = &info->mti_res_id;
1289 fid_build_reg_res_name(&LUSTRE_BFL_FID, res_id);
1290 memset(policy, 0, sizeof *policy);
1291 policy->l_inodebits.bits = MDS_INODELOCK_UPDATE;
1292 flags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB;
1293 rc = ldlm_cli_enqueue_local(info->mti_env, ns, res_id,
1294 LDLM_IBITS, policy, LCK_EX, &flags,
1296 ldlm_completion_ast, NULL, NULL, 0,
1298 &info->mti_exp->exp_handle.h_cookie,
1305 static void mdt_rename_unlock(struct lustre_handle *lh)
1308 LASSERT(lustre_handle_is_used(lh));
1309 /* Cancel the single rename lock right away */
1310 ldlm_lock_decref_and_cancel(lh, LCK_EX);
1314 static struct mdt_object *mdt_parent_find_check(struct mdt_thread_info *info,
1315 const struct lu_fid *fid,
1318 struct mdt_object *dir;
1323 dir = mdt_object_find(info->mti_env, info->mti_mdt, fid);
1327 /* check early, the real version will be saved after locking */
1328 rc = mdt_version_get_check(info, dir, idx);
1332 if (!mdt_object_exists(dir))
1333 GOTO(out_put, rc = -ENOENT);
1335 if (!S_ISDIR(lu_object_attr(&dir->mot_obj)))
1336 GOTO(out_put, rc = -ENOTDIR);
1340 mdt_object_put(info->mti_env, dir);
1345 * in case obj is remote obj on its parent, revoke LOOKUP lock,
1346 * herein we don't really check it, just do revoke.
1348 int mdt_revoke_remote_lookup_lock(struct mdt_thread_info *info,
1349 struct mdt_object *pobj,
1350 struct mdt_object *obj)
1352 struct mdt_lock_handle *lh = &info->mti_lh[MDT_LH_LOCAL];
1355 mdt_lock_handle_init(lh);
1356 mdt_lock_reg_init(lh, LCK_EX);
1358 if (mdt_object_remote(pobj)) {
1359 /* don't bother to check if pobj and obj are on the same MDT. */
1360 rc = mdt_remote_object_lock(info, pobj, mdt_object_fid(obj),
1361 &lh->mlh_rreg_lh, LCK_EX,
1362 MDS_INODELOCK_LOOKUP, false);
1363 } else if (mdt_object_remote(obj)) {
1364 struct ldlm_res_id *res = &info->mti_res_id;
1365 union ldlm_policy_data *policy = &info->mti_policy;
1366 __u64 dlmflags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB |
1367 LDLM_FL_COS_INCOMPAT;
1369 fid_build_reg_res_name(mdt_object_fid(obj), res);
1370 memset(policy, 0, sizeof(*policy));
1371 policy->l_inodebits.bits = MDS_INODELOCK_LOOKUP;
1372 rc = mdt_fid_lock(info->mti_env, info->mti_mdt->mdt_namespace,
1373 &lh->mlh_reg_lh, LCK_EX, policy, res,
1376 /* do nothing if both are local */
1384 * TODO, currently we don't save this lock because there is no place to
1385 * hold this lock handle, but to avoid race we need to save this lock.
1387 mdt_object_unlock(info, NULL, lh, 1);
1393 * operation may takes locks of linkea, or directory stripes, group them in
1396 struct mdt_sub_lock {
1397 struct mdt_object *msl_obj;
1398 struct mdt_lock_handle msl_lh;
1399 struct list_head msl_linkage;
1402 static void mdt_unlock_list(struct mdt_thread_info *info,
1403 struct list_head *list, int decref)
1405 struct mdt_sub_lock *msl;
1406 struct mdt_sub_lock *tmp;
1408 list_for_each_entry_safe(msl, tmp, list, msl_linkage) {
1409 mdt_object_unlock_put(info, msl->msl_obj, &msl->msl_lh, decref);
1410 list_del(&msl->msl_linkage);
1415 static inline void mdt_migrate_object_unlock(struct mdt_thread_info *info,
1416 struct mdt_object *obj,
1417 struct mdt_lock_handle *lh,
1418 struct ldlm_enqueue_info *einfo,
1419 struct list_head *slave_locks,
1422 if (mdt_object_remote(obj)) {
1423 mdt_unlock_list(info, slave_locks, decref);
1424 mdt_object_unlock(info, obj, lh, decref);
1426 mdt_reint_striped_unlock(info, obj, lh, einfo, decref);
1431 * lock parents of links, and also check whether total locks don't exceed
1434 * \retval 0 on success, and locks can be saved in ptlrpc_reply_stat
1435 * \retval 1 on success, but total lock count may exceed RS_MAX_LOCKS
1436 * \retval -ev negative errno upon error
1438 static int mdt_link_parents_lock(struct mdt_thread_info *info,
1439 struct mdt_object *pobj,
1440 const struct md_attr *ma,
1441 struct mdt_object *obj,
1442 struct mdt_lock_handle *lhp,
1443 struct ldlm_enqueue_info *peinfo,
1444 struct list_head *parent_slave_locks,
1445 struct list_head *link_locks)
1447 struct mdt_device *mdt = info->mti_mdt;
1448 struct lu_buf *buf = &info->mti_big_buf;
1449 struct lu_name *lname = &info->mti_name;
1450 struct linkea_data ldata = { NULL };
1451 bool blocked = false;
1452 int local_lnkp_cnt = 0;
1457 if (S_ISDIR(lu_object_attr(&obj->mot_obj)))
1460 buf = lu_buf_check_and_alloc(buf, MAX_LINKEA_SIZE);
1461 if (buf->lb_buf == NULL)
1465 rc = mdt_links_read(info, obj, &ldata);
1467 if (rc == -ENOENT || rc == -ENODATA)
1472 for (linkea_first_entry(&ldata); ldata.ld_lee && !rc;
1473 linkea_next_entry(&ldata)) {
1474 struct mdt_object *lnkp;
1475 struct mdt_sub_lock *msl;
1479 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, lname,
1482 /* check if it's also linked to parent */
1483 if (lu_fid_eq(mdt_object_fid(pobj), &fid)) {
1484 CDEBUG(D_INFO, "skip parent "DFID", reovke "DNAME"\n",
1485 PFID(&fid), PNAME(lname));
1486 /* in case link is remote object, revoke LOOKUP lock */
1487 rc = mdt_revoke_remote_lookup_lock(info, pobj, obj);
1493 /* check if it's linked to a stripe of parent */
1494 if (ma->ma_valid & MA_LMV) {
1495 struct lmv_mds_md_v1 *lmv = &ma->ma_lmv->lmv_md_v1;
1496 struct lu_fid *stripe_fid = &info->mti_tmp_fid1;
1499 for (; j < le32_to_cpu(lmv->lmv_stripe_count); j++) {
1500 fid_le_to_cpu(stripe_fid,
1501 &lmv->lmv_stripe_fids[j]);
1502 if (lu_fid_eq(stripe_fid, &fid)) {
1503 CDEBUG(D_INFO, "skip stripe "DFID
1504 ", reovke "DNAME"\n",
1505 PFID(&fid), PNAME(lname));
1506 lnkp = mdt_object_find(info->mti_env,
1509 GOTO(out, rc = PTR_ERR(lnkp));
1515 rc = mdt_revoke_remote_lookup_lock(info, lnkp,
1517 mdt_object_put(info->mti_env, lnkp);
1522 /* Check if it's already locked */
1523 list_for_each_entry(msl, link_locks, msl_linkage) {
1524 if (lu_fid_eq(mdt_object_fid(msl->msl_obj), &fid)) {
1526 DFID" was locked, revoke "DNAME"\n",
1527 PFID(&fid), PNAME(lname));
1528 lnkp = msl->msl_obj;
1534 rc = mdt_revoke_remote_lookup_lock(info, lnkp, obj);
1538 CDEBUG(D_INFO, "lock "DFID":"DNAME"\n",
1539 PFID(&fid), PNAME(lname));
1541 lnkp = mdt_object_find(info->mti_env, mdt, &fid);
1543 CWARN("%s: cannot find obj "DFID": %ld\n",
1544 mdt_obd_name(mdt), PFID(&fid), PTR_ERR(lnkp));
1548 if (!mdt_object_exists(lnkp)) {
1549 CDEBUG(D_INFO, DFID" doesn't exist, skip "DNAME"\n",
1550 PFID(&fid), PNAME(lname));
1551 mdt_object_put(info->mti_env, lnkp);
1555 if (!mdt_object_remote(lnkp))
1560 GOTO(out, rc = -ENOMEM);
1563 * we can't follow parent-child lock order like other MD
1564 * operations, use lock_try here to avoid deadlock, if the lock
1565 * cannot be taken, drop all locks taken, revoke the blocked
1566 * one, and continue processing the remaining entries, and in
1567 * the end of the loop restart from beginning.
1569 mdt_lock_pdo_init(&msl->msl_lh, LCK_PW, lname);
1571 rc = mdt_object_lock_try(info, lnkp, &msl->msl_lh, &ibits,
1572 MDS_INODELOCK_UPDATE, true);
1573 if (!(ibits & MDS_INODELOCK_UPDATE)) {
1575 CDEBUG(D_INFO, "busy lock on "DFID" "DNAME"\n",
1576 PFID(&fid), PNAME(lname));
1578 mdt_unlock_list(info, link_locks, 1);
1579 /* also unlock parent locks to avoid deadlock */
1581 mdt_migrate_object_unlock(info, pobj, lhp,
1588 mdt_lock_pdo_init(&msl->msl_lh, LCK_PW, lname);
1589 rc = mdt_object_lock(info, lnkp, &msl->msl_lh,
1590 MDS_INODELOCK_UPDATE);
1592 mdt_object_put(info->mti_env, lnkp);
1597 if (mdt_object_remote(lnkp)) {
1598 struct ldlm_lock *lock;
1601 * for remote object, set lock cb_atomic,
1602 * so lock can be released in blocking_ast()
1603 * immediately, then the next lock_try will
1604 * have better chance of success.
1606 lock = ldlm_handle2lock(
1607 &msl->msl_lh.mlh_rreg_lh);
1608 LASSERT(lock != NULL);
1609 lock_res_and_lock(lock);
1610 ldlm_set_atomic_cb(lock);
1611 unlock_res_and_lock(lock);
1612 LDLM_LOCK_PUT(lock);
1615 mdt_object_unlock_put(info, lnkp, &msl->msl_lh, 1);
1620 INIT_LIST_HEAD(&msl->msl_linkage);
1621 msl->msl_obj = lnkp;
1622 list_add_tail(&msl->msl_linkage, link_locks);
1624 rc = mdt_revoke_remote_lookup_lock(info, lnkp, obj);
1628 GOTO(out, rc = -EBUSY);
1633 mdt_unlock_list(info, link_locks, rc);
1634 else if (local_lnkp_cnt > RS_MAX_LOCKS - 6)
1636 * parent may have 3 local objects: master object and 2 stripes
1637 * (if it's being migrated too); source may have 2 local
1638 * objects: master and 1 stripe; target has 1 local object.
1644 static int mdt_lock_remote_slaves(struct mdt_thread_info *info,
1645 struct mdt_object *obj,
1646 const struct md_attr *ma,
1647 struct list_head *slave_locks)
1649 struct mdt_device *mdt = info->mti_mdt;
1650 const struct lmv_mds_md_v1 *lmv = &ma->ma_lmv->lmv_md_v1;
1651 struct lu_fid *fid = &info->mti_tmp_fid1;
1652 struct mdt_object *slave;
1653 struct mdt_sub_lock *msl;
1659 LASSERT(mdt_object_remote(obj));
1660 LASSERT(ma->ma_valid & MA_LMV);
1663 if (le32_to_cpu(lmv->lmv_magic) != LMV_MAGIC_V1)
1666 if (le32_to_cpu(lmv->lmv_stripe_count) < 1)
1669 for (i = 0; i < le32_to_cpu(lmv->lmv_stripe_count); i++) {
1670 fid_le_to_cpu(fid, &lmv->lmv_stripe_fids[i]);
1672 if (!fid_is_sane(fid))
1675 slave = mdt_object_find(info->mti_env, mdt, fid);
1677 GOTO(out, rc = PTR_ERR(slave));
1681 mdt_object_put(info->mti_env, slave);
1682 GOTO(out, rc = -ENOMEM);
1685 mdt_lock_reg_init(&msl->msl_lh, LCK_EX);
1686 rc = mdt_reint_object_lock(info, slave, &msl->msl_lh,
1687 MDS_INODELOCK_UPDATE, true);
1690 mdt_object_put(info->mti_env, slave);
1694 INIT_LIST_HEAD(&msl->msl_linkage);
1695 msl->msl_obj = slave;
1696 list_add_tail(&msl->msl_linkage, slave_locks);
1702 mdt_unlock_list(info, slave_locks, rc);
1706 /* lock parent and its stripes */
1707 static int mdt_migrate_parent_lock(struct mdt_thread_info *info,
1708 struct mdt_object *obj,
1709 const struct md_attr *ma,
1710 struct mdt_lock_handle *lh,
1711 struct ldlm_enqueue_info *einfo,
1712 struct list_head *slave_locks)
1716 if (mdt_object_remote(obj)) {
1717 rc = mdt_remote_object_lock(info, obj, mdt_object_fid(obj),
1718 &lh->mlh_rreg_lh, LCK_PW,
1719 MDS_INODELOCK_UPDATE, false);
1724 * if obj is remote and striped, lock its stripes explicitly
1725 * because it's not striped in LOD layer on this MDT.
1727 if (ma->ma_valid & MA_LMV) {
1728 rc = mdt_lock_remote_slaves(info, obj, ma, slave_locks);
1730 mdt_object_unlock(info, obj, lh, rc);
1733 rc = mdt_reint_striped_lock(info, obj, lh, MDS_INODELOCK_UPDATE,
1741 * in migration, object may be remote, and we need take full lock of it and its
1742 * stripes if it's directory, besides, object may be a remote object on its
1743 * parent, revoke its LOOKUP lock on where its parent is located.
1745 static int mdt_migrate_object_lock(struct mdt_thread_info *info,
1746 struct mdt_object *pobj,
1747 struct mdt_object *obj,
1748 struct mdt_lock_handle *lh,
1749 struct ldlm_enqueue_info *einfo,
1750 struct list_head *slave_locks)
1754 if (mdt_object_remote(obj)) {
1755 rc = mdt_revoke_remote_lookup_lock(info, pobj, obj);
1759 rc = mdt_remote_object_lock(info, obj, mdt_object_fid(obj),
1760 &lh->mlh_rreg_lh, LCK_EX,
1761 MDS_INODELOCK_FULL, false);
1766 * if obj is remote and striped, lock its stripes explicitly
1767 * because it's not striped in LOD layer on this MDT.
1769 if (S_ISDIR(lu_object_attr(&obj->mot_obj))) {
1770 struct md_attr *ma = &info->mti_attr;
1772 ma->ma_lmv = info->mti_big_lmm;
1773 ma->ma_lmv_size = info->mti_big_lmmsize;
1775 rc = mdt_stripe_get(info, obj, ma, XATTR_NAME_LMV);
1777 mdt_object_unlock(info, obj, lh, rc);
1781 if (ma->ma_valid & MA_LMV) {
1782 rc = mdt_lock_remote_slaves(info, obj, ma,
1785 mdt_object_unlock(info, obj, lh, rc);
1789 if (mdt_object_remote(pobj)) {
1790 rc = mdt_revoke_remote_lookup_lock(info, pobj, obj);
1795 rc = mdt_reint_striped_lock(info, obj, lh, MDS_INODELOCK_FULL,
1803 * lookup source by name, if parent is striped directory, we need to find the
1804 * corresponding stripe where source is located, and then lookup there.
1806 * besides, if parent is migrating too, and file is already in target stripe,
1807 * this should be a redo of 'lfs migrate' on client side.
1809 static int mdt_migrate_lookup(struct mdt_thread_info *info,
1810 struct mdt_object *pobj,
1811 const struct md_attr *ma,
1812 const struct lu_name *lname,
1813 struct mdt_object **spobj,
1814 struct mdt_object **sobj)
1816 const struct lu_env *env = info->mti_env;
1817 struct lu_fid *fid = &info->mti_tmp_fid1;
1818 struct mdt_object *stripe;
1821 if (ma->ma_valid & MA_LMV) {
1822 /* if parent is striped, lookup on corresponding stripe */
1823 struct lmv_mds_md_v1 *lmv = &ma->ma_lmv->lmv_md_v1;
1824 __u32 hash_type = le32_to_cpu(lmv->lmv_hash_type);
1825 __u32 stripe_count = le32_to_cpu(lmv->lmv_stripe_count);
1826 bool is_migrating = le32_to_cpu(lmv->lmv_hash_type) &
1827 LMV_HASH_FLAG_MIGRATION;
1830 hash_type = le32_to_cpu(lmv->lmv_migrate_hash);
1831 stripe_count -= le32_to_cpu(lmv->lmv_migrate_offset);
1834 rc = lmv_name_to_stripe_index(hash_type, stripe_count,
1840 if (le32_to_cpu(lmv->lmv_hash_type) & LMV_HASH_FLAG_MIGRATION)
1841 rc += le32_to_cpu(lmv->lmv_migrate_offset);
1843 fid_le_to_cpu(fid, &lmv->lmv_stripe_fids[rc]);
1845 stripe = mdt_object_find(env, info->mti_mdt, fid);
1847 return PTR_ERR(stripe);
1850 rc = mdo_lookup(env, mdt_object_child(stripe), lname, fid,
1852 if (rc == -ENOENT && is_migrating) {
1854 * if parent is migrating, and lookup child failed on
1855 * source stripe, lookup again on target stripe, if it
1856 * exists, it means previous migration was interrupted,
1857 * and current file was migrated already.
1859 mdt_object_put(env, stripe);
1861 hash_type = le32_to_cpu(lmv->lmv_hash_type);
1862 stripe_count = le32_to_cpu(lmv->lmv_migrate_offset);
1864 rc = lmv_name_to_stripe_index(hash_type, stripe_count,
1870 fid_le_to_cpu(fid, &lmv->lmv_stripe_fids[rc]);
1872 stripe = mdt_object_find(env, info->mti_mdt, fid);
1874 return PTR_ERR(stripe);
1877 rc = mdo_lookup(env, mdt_object_child(stripe), lname,
1878 fid, &info->mti_spec);
1879 mdt_object_put(env, stripe);
1880 return rc ?: -EALREADY;
1882 mdt_object_put(env, stripe);
1887 rc = mdo_lookup(env, mdt_object_child(pobj), lname, fid,
1893 mdt_object_get(env, stripe);
1898 *sobj = mdt_object_find(env, info->mti_mdt, fid);
1899 if (IS_ERR(*sobj)) {
1900 mdt_object_put(env, stripe);
1901 rc = PTR_ERR(*sobj);
1909 /* end lease and close file for regular file */
1910 static int mdd_migrate_close(struct mdt_thread_info *info,
1911 struct mdt_object *obj)
1913 struct close_data *data;
1914 struct mdt_body *repbody;
1915 struct ldlm_lock *lease;
1920 if (!req_capsule_field_present(info->mti_pill, &RMF_MDT_EPOCH,
1922 !req_capsule_field_present(info->mti_pill, &RMF_CLOSE_DATA,
1926 data = req_capsule_client_get(info->mti_pill, &RMF_CLOSE_DATA);
1931 lease = ldlm_handle2lock(&data->cd_handle);
1935 /* check if the lease was already canceled */
1936 lock_res_and_lock(lease);
1937 rc = ldlm_is_cancel(lease);
1938 unlock_res_and_lock(lease);
1942 LDLM_DEBUG(lease, DFID" lease broken",
1943 PFID(mdt_object_fid(obj)));
1947 * cancel server side lease, client side counterpart should have been
1948 * cancelled, it's okay to cancel it now as we've held mot_open_sem.
1950 ldlm_lock_cancel(lease);
1951 ldlm_reprocess_all(lease->l_resource, lease);
1952 LDLM_LOCK_PUT(lease);
1955 rc2 = mdt_close_internal(info, mdt_info_req(info), NULL);
1956 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1957 repbody->mbo_valid |= OBD_MD_CLOSE_INTENT_EXECED;
1963 * migrate file in below steps:
1964 * 1. lock parent and its stripes
1965 * 2. lookup source by name
1966 * 3. lock parents of source links if source is not directory
1967 * 4. reject if source is in HSM
1968 * 5. take source open_sem and close file if source is regular file
1969 * 6. lock source and its stripes if it's directory
1970 * 7. lock target so subsequent change to it can trigger COS
1972 * 9. unlock above locks
1973 * 10. sync device if source has links
1975 static int mdt_reint_migrate(struct mdt_thread_info *info,
1976 struct mdt_lock_handle *unused)
1978 const struct lu_env *env = info->mti_env;
1979 struct mdt_device *mdt = info->mti_mdt;
1980 struct ptlrpc_request *req = mdt_info_req(info);
1981 struct mdt_reint_record *rr = &info->mti_rr;
1982 struct lu_ucred *uc = mdt_ucred(info);
1983 struct md_attr *ma = &info->mti_attr;
1984 struct ldlm_enqueue_info *peinfo = &info->mti_einfo[0];
1985 struct ldlm_enqueue_info *seinfo = &info->mti_einfo[1];
1986 struct mdt_object *pobj;
1987 struct mdt_object *spobj = NULL;
1988 struct mdt_object *sobj = NULL;
1989 struct mdt_object *tobj;
1990 struct lustre_handle rename_lh = { 0 };
1991 struct mdt_lock_handle *lhp;
1992 struct mdt_lock_handle *lhs;
1993 struct mdt_lock_handle *lht;
1994 LIST_HEAD(parent_slave_locks);
1995 LIST_HEAD(child_slave_locks);
1996 LIST_HEAD(link_locks);
1997 int lock_retries = 5;
1998 bool open_sem_locked = false;
1999 bool do_sync = false;
2003 CDEBUG(D_INODE, "migrate "DFID"/"DNAME" to "DFID"\n", PFID(rr->rr_fid1),
2004 PNAME(&rr->rr_name), PFID(rr->rr_fid2));
2006 if (info->mti_dlm_req)
2007 ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP);
2009 if (!fid_is_md_operative(rr->rr_fid1) ||
2010 !fid_is_md_operative(rr->rr_fid2))
2013 /* don't allow migrate . or .. */
2014 if (lu_name_is_dot_or_dotdot(&rr->rr_name))
2017 if (!mdt->mdt_enable_remote_dir || !mdt->mdt_enable_dir_migration)
2020 if (!md_capable(uc, CFS_CAP_SYS_ADMIN) &&
2021 uc->uc_gid != mdt->mdt_enable_remote_dir_gid &&
2022 mdt->mdt_enable_remote_dir_gid != -1)
2026 * Note: do not enqueue rename lock for replay request, because
2027 * if other MDT holds rename lock, but being blocked to wait for
2028 * this MDT to finish its recovery, and the failover MDT can not
2029 * get rename lock, which will cause deadlock.
2031 if (!req_is_replay(req)) {
2032 rc = mdt_rename_lock(info, &rename_lh);
2034 CERROR("%s: can't lock FS for rename: rc = %d\n",
2035 mdt_obd_name(info->mti_mdt), rc);
2040 /* pobj is master object of parent */
2041 pobj = mdt_parent_find_check(info, rr->rr_fid1, 0);
2043 GOTO(unlock_rename, rc = PTR_ERR(pobj));
2045 if (unlikely(!info->mti_big_lmm)) {
2046 info->mti_big_lmmsize = lmv_mds_md_size(64, LMV_MAGIC);
2047 OBD_ALLOC(info->mti_big_lmm, info->mti_big_lmmsize);
2048 if (!info->mti_big_lmm)
2049 GOTO(put_parent, rc = -ENOMEM);
2052 ma->ma_lmv = info->mti_big_lmm;
2053 ma->ma_lmv_size = info->mti_big_lmmsize;
2055 rc = mdt_stripe_get(info, pobj, ma, XATTR_NAME_LMV);
2057 GOTO(put_parent, rc);
2060 /* lock parent object */
2061 lhp = &info->mti_lh[MDT_LH_PARENT];
2062 mdt_lock_reg_init(lhp, LCK_PW);
2063 rc = mdt_migrate_parent_lock(info, pobj, ma, lhp, peinfo,
2064 &parent_slave_locks);
2066 GOTO(put_parent, rc);
2069 * spobj is the corresponding stripe against name if pobj is striped
2070 * directory, which is the real parent, and no need to lock, because
2071 * we've taken full lock of pobj.
2073 rc = mdt_migrate_lookup(info, pobj, ma, &rr->rr_name, &spobj, &sobj);
2075 GOTO(unlock_parent, rc);
2077 /* lock parents of source links, and revoke LOOKUP lock of links */
2078 rc = mdt_link_parents_lock(info, pobj, ma, sobj, lhp, peinfo,
2079 &parent_slave_locks, &link_locks);
2080 if (rc == -EBUSY && lock_retries-- > 0) {
2081 mdt_object_put(env, sobj);
2082 mdt_object_put(env, spobj);
2087 GOTO(put_source, rc);
2090 * RS_MAX_LOCKS is the limit of number of locks that can be saved along
2091 * with one request, if total lock count exceeds this limit, we will
2092 * drop all locks after migration, and synchronous device in the end.
2096 /* TODO: DoM migration is not supported yet */
2097 if (S_ISREG(lu_object_attr(&sobj->mot_obj))) {
2098 ma->ma_lmm = info->mti_big_lmm;
2099 ma->ma_lmm_size = info->mti_big_lmmsize;
2101 rc = mdt_stripe_get(info, sobj, ma, XATTR_NAME_LOV);
2103 GOTO(put_source, rc);
2105 if (ma->ma_valid & MA_LOV &&
2106 mdt_lmm_dom_entry(ma->ma_lmm) != LMM_NO_DOM)
2107 GOTO(put_source, rc = -EOPNOTSUPP);
2110 /* if migration HSM is allowed */
2111 if (!mdt->mdt_opts.mo_migrate_hsm_allowed) {
2112 ma->ma_need = MA_HSM;
2114 rc = mdt_attr_get_complex(info, sobj, ma);
2116 GOTO(unlock_links, rc);
2118 if ((ma->ma_valid & MA_HSM) && ma->ma_hsm.mh_flags != 0)
2119 GOTO(unlock_links, rc = -EOPNOTSUPP);
2122 /* end lease and close file for regular file */
2123 if (info->mti_spec.sp_migrate_close) {
2124 /* try to hold open_sem so that nobody else can open the file */
2125 if (!down_write_trylock(&sobj->mot_open_sem)) {
2127 mdd_migrate_close(info, sobj);
2128 GOTO(unlock_links, rc = -EBUSY);
2130 open_sem_locked = true;
2131 rc = mdd_migrate_close(info, sobj);
2133 GOTO(unlock_open_sem, rc);
2138 lhs = &info->mti_lh[MDT_LH_OLD];
2139 mdt_lock_reg_init(lhs, LCK_EX);
2140 rc = mdt_migrate_object_lock(info, spobj, sobj, lhs, seinfo,
2141 &child_slave_locks);
2143 GOTO(unlock_open_sem, rc);
2146 tobj = mdt_object_find(env, mdt, rr->rr_fid2);
2148 GOTO(unlock_source, rc = PTR_ERR(tobj));
2150 lht = &info->mti_lh[MDT_LH_NEW];
2151 mdt_lock_reg_init(lht, LCK_EX);
2152 rc = mdt_reint_object_lock(info, tobj, lht, MDS_INODELOCK_FULL, true);
2154 GOTO(put_target, rc);
2156 /* Don't do lookup sanity check. We know name doesn't exist. */
2157 info->mti_spec.sp_cr_lookup = 0;
2158 info->mti_spec.sp_feat = &dt_directory_features;
2160 rc = mdo_migrate(env, mdt_object_child(pobj),
2161 mdt_object_child(sobj), &rr->rr_name,
2162 mdt_object_child(tobj), &info->mti_spec, ma);
2165 mdt_object_unlock(info, tobj, lht, rc);
2167 mdt_object_put(env, tobj);
2169 mdt_migrate_object_unlock(info, sobj, lhs, seinfo,
2170 &child_slave_locks, rc);
2172 if (open_sem_locked)
2173 up_write(&sobj->mot_open_sem);
2175 /* if we've got too many locks to save into RPC,
2176 * then just commit before the locks are released */
2178 mdt_device_sync(env, mdt);
2179 mdt_unlock_list(info, &link_locks, do_sync ? 1 : rc);
2181 mdt_object_put(env, sobj);
2182 mdt_object_put(env, spobj);
2184 mdt_migrate_object_unlock(info, pobj, lhp, peinfo,
2185 &parent_slave_locks, rc);
2187 mdt_object_put(env, pobj);
2189 if (lustre_handle_is_used(&rename_lh))
2190 mdt_rename_unlock(&rename_lh);
2195 static int mdt_object_lock_save(struct mdt_thread_info *info,
2196 struct mdt_object *dir,
2197 struct mdt_lock_handle *lh,
2198 int idx, bool cos_incompat)
2202 /* we lock the target dir if it is local */
2203 rc = mdt_reint_object_lock(info, dir, lh, MDS_INODELOCK_UPDATE,
2208 /* get and save correct version after locking */
2209 mdt_version_get_save(info, dir, idx);
2214 * determine lock order of sobj and tobj
2216 * there are two situations we need to lock tobj before sobj:
2217 * 1. sobj is child of tobj
2218 * 2. sobj and tobj are stripes of a directory, and stripe index of sobj is
2219 * larger than that of tobj
2221 * \retval 1 lock tobj before sobj
2222 * \retval 0 lock sobj before tobj
2223 * \retval -ev negative errno upon error
2225 static int mdt_rename_determine_lock_order(struct mdt_thread_info *info,
2226 struct mdt_object *sobj,
2227 struct mdt_object *tobj)
2229 struct md_attr *ma = &info->mti_attr;
2230 struct lu_fid *spfid = &info->mti_tmp_fid1;
2231 struct lu_fid *tpfid = &info->mti_tmp_fid2;
2232 struct lmv_mds_md_v1 *lmv;
2237 /* sobj and tobj are the same */
2241 if (fid_is_root(mdt_object_fid(sobj)))
2244 if (fid_is_root(mdt_object_fid(tobj)))
2247 /* check whether sobj is child of tobj */
2248 rc = mdo_is_subdir(info->mti_env, mdt_object_child(sobj),
2249 mdt_object_fid(tobj));
2256 /* check whether sobj and tobj are children of the same parent */
2257 rc = mdt_attr_get_pfid(info, sobj, spfid);
2261 rc = mdt_attr_get_pfid(info, tobj, tpfid);
2265 if (!lu_fid_eq(spfid, tpfid))
2268 /* check whether sobj and tobj are sibling stripes */
2269 ma->ma_need = MA_LMV;
2271 ma->ma_lmv = (union lmv_mds_md *)info->mti_xattr_buf;
2272 ma->ma_lmv_size = sizeof(info->mti_xattr_buf);
2273 rc = mdt_stripe_get(info, sobj, ma, XATTR_NAME_LMV);
2277 if (!(ma->ma_valid & MA_LMV))
2280 lmv = &ma->ma_lmv->lmv_md_v1;
2281 if (!(le32_to_cpu(lmv->lmv_magic) & LMV_MAGIC_STRIPE))
2283 sindex = le32_to_cpu(lmv->lmv_master_mdt_index);
2286 rc = mdt_stripe_get(info, tobj, ma, XATTR_NAME_LMV);
2290 if (!(ma->ma_valid & MA_LMV))
2293 lmv = &ma->ma_lmv->lmv_md_v1;
2294 if (!(le32_to_cpu(lmv->lmv_magic) & LMV_MAGIC_STRIPE))
2296 tindex = le32_to_cpu(lmv->lmv_master_mdt_index);
2298 /* check stripe index of sobj and tobj */
2299 if (sindex == tindex)
2302 return sindex < tindex ? 0 : 1;
2306 * VBR: rename versions in reply: 0 - srcdir parent; 1 - tgtdir parent;
2307 * 2 - srcdir child; 3 - tgtdir child.
2308 * Update on disk version of srcdir child.
2310 static int mdt_reint_rename(struct mdt_thread_info *info,
2311 struct mdt_lock_handle *unused)
2313 struct mdt_device *mdt = info->mti_mdt;
2314 struct mdt_reint_record *rr = &info->mti_rr;
2315 struct md_attr *ma = &info->mti_attr;
2316 struct ptlrpc_request *req = mdt_info_req(info);
2317 struct mdt_object *msrcdir = NULL;
2318 struct mdt_object *mtgtdir = NULL;
2319 struct mdt_object *mold;
2320 struct mdt_object *mnew = NULL;
2321 struct lustre_handle rename_lh = { 0 };
2322 struct mdt_lock_handle *lh_srcdirp;
2323 struct mdt_lock_handle *lh_tgtdirp;
2324 struct mdt_lock_handle *lh_oldp = NULL;
2325 struct mdt_lock_handle *lh_newp = NULL;
2326 struct lu_fid *old_fid = &info->mti_tmp_fid1;
2327 struct lu_fid *new_fid = &info->mti_tmp_fid2;
2329 bool reverse = false, discard = false;
2334 DEBUG_REQ(D_INODE, req, "rename "DFID"/"DNAME" to "DFID"/"DNAME,
2335 PFID(rr->rr_fid1), PNAME(&rr->rr_name),
2336 PFID(rr->rr_fid2), PNAME(&rr->rr_tgt_name));
2338 if (info->mti_dlm_req)
2339 ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP);
2341 if (!fid_is_md_operative(rr->rr_fid1) ||
2342 !fid_is_md_operative(rr->rr_fid2))
2345 /* find both parents. */
2346 msrcdir = mdt_parent_find_check(info, rr->rr_fid1, 0);
2347 if (IS_ERR(msrcdir))
2348 RETURN(PTR_ERR(msrcdir));
2350 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME3, 5);
2352 if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) {
2354 mdt_object_get(info->mti_env, mtgtdir);
2356 mtgtdir = mdt_parent_find_check(info, rr->rr_fid2, 1);
2357 if (IS_ERR(mtgtdir))
2358 GOTO(out_put_srcdir, rc = PTR_ERR(mtgtdir));
2362 * Note: do not enqueue rename lock for replay request, because
2363 * if other MDT holds rename lock, but being blocked to wait for
2364 * this MDT to finish its recovery, and the failover MDT can not
2365 * get rename lock, which will cause deadlock.
2367 if (!req_is_replay(req)) {
2369 * Normally rename RPC is handled on the MDT with the target
2370 * directory (if target exists, it's on the MDT with the
2371 * target), if the source directory is remote, it's a hint that
2372 * source is remote too (this may not be true, but it won't
2373 * cause any issue), return -EXDEV early to avoid taking
2376 if (!mdt->mdt_enable_remote_rename &&
2377 mdt_object_remote(msrcdir))
2378 GOTO(out_put_tgtdir, rc = -EXDEV);
2380 rc = mdt_rename_lock(info, &rename_lh);
2382 CERROR("%s: can't lock FS for rename: rc = %d\n",
2383 mdt_obd_name(mdt), rc);
2384 GOTO(out_put_tgtdir, rc);
2388 rc = mdt_rename_determine_lock_order(info, msrcdir, mtgtdir);
2390 GOTO(out_unlock_rename, rc);
2394 /* source needs to be looked up after locking source parent, otherwise
2395 * this rename may race with unlink source, and cause rename hang, see
2396 * sanityn.sh 55b, so check parents first, if later we found source is
2397 * remote, relock parents. */
2398 cos_incompat = (mdt_object_remote(msrcdir) ||
2399 mdt_object_remote(mtgtdir));
2401 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME4, 5);
2403 /* lock parents in the proper order. */
2404 lh_srcdirp = &info->mti_lh[MDT_LH_PARENT];
2405 lh_tgtdirp = &info->mti_lh[MDT_LH_CHILD];
2408 mdt_lock_pdo_init(lh_srcdirp, LCK_PW, &rr->rr_name);
2409 mdt_lock_pdo_init(lh_tgtdirp, LCK_PW, &rr->rr_tgt_name);
2412 rc = mdt_object_lock_save(info, mtgtdir, lh_tgtdirp, 1,
2415 GOTO(out_unlock_rename, rc);
2417 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME, 5);
2419 rc = mdt_object_lock_save(info, msrcdir, lh_srcdirp, 0,
2422 mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc);
2423 GOTO(out_unlock_rename, rc);
2426 rc = mdt_object_lock_save(info, msrcdir, lh_srcdirp, 0,
2429 GOTO(out_unlock_rename, rc);
2431 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME, 5);
2433 if (mtgtdir != msrcdir) {
2434 rc = mdt_object_lock_save(info, mtgtdir, lh_tgtdirp, 1,
2436 } else if (!mdt_object_remote(mtgtdir) &&
2437 lh_srcdirp->mlh_pdo_hash !=
2438 lh_tgtdirp->mlh_pdo_hash) {
2439 rc = mdt_pdir_hash_lock(info, lh_tgtdirp, mtgtdir,
2440 MDS_INODELOCK_UPDATE,
2442 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK2, 10);
2445 mdt_object_unlock(info, msrcdir, lh_srcdirp, rc);
2446 GOTO(out_unlock_rename, rc);
2450 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME4, 5);
2451 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME2, 5);
2453 /* find mold object. */
2455 rc = mdt_lookup_version_check(info, msrcdir, &rr->rr_name, old_fid, 2);
2457 GOTO(out_unlock_parents, rc);
2459 if (lu_fid_eq(old_fid, rr->rr_fid1) || lu_fid_eq(old_fid, rr->rr_fid2))
2460 GOTO(out_unlock_parents, rc = -EINVAL);
2462 if (!fid_is_md_operative(old_fid))
2463 GOTO(out_unlock_parents, rc = -EPERM);
2465 mold = mdt_object_find(info->mti_env, info->mti_mdt, old_fid);
2467 GOTO(out_unlock_parents, rc = PTR_ERR(mold));
2469 if (!mdt_object_exists(mold)) {
2470 LU_OBJECT_DEBUG(D_INODE, info->mti_env,
2472 "object does not exist");
2473 GOTO(out_put_old, rc = -ENOENT);
2476 if (mdt_object_remote(mold) && !mdt->mdt_enable_remote_rename)
2477 GOTO(out_put_old, rc = -EXDEV);
2479 /* Check if @mtgtdir is subdir of @mold, before locking child
2480 * to avoid reverse locking. */
2481 if (mtgtdir != msrcdir) {
2482 rc = mdo_is_subdir(info->mti_env, mdt_object_child(mtgtdir),
2487 GOTO(out_put_old, rc);
2491 tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(mold));
2492 /* save version after locking */
2493 mdt_version_get_save(info, mold, 2);
2495 if (!cos_incompat && mdt_object_remote(mold)) {
2496 cos_incompat = true;
2497 mdt_object_put(info->mti_env, mold);
2498 mdt_object_unlock(info, mtgtdir, lh_tgtdirp, -EAGAIN);
2499 mdt_object_unlock(info, msrcdir, lh_srcdirp, -EAGAIN);
2503 /* find mnew object:
2504 * mnew target object may not exist now
2505 * lookup with version checking */
2507 rc = mdt_lookup_version_check(info, mtgtdir, &rr->rr_tgt_name, new_fid,
2510 /* the new_fid should have been filled at this moment */
2511 if (lu_fid_eq(old_fid, new_fid))
2512 GOTO(out_put_old, rc);
2514 if (lu_fid_eq(new_fid, rr->rr_fid1) ||
2515 lu_fid_eq(new_fid, rr->rr_fid2))
2516 GOTO(out_put_old, rc = -EINVAL);
2518 if (!fid_is_md_operative(new_fid))
2519 GOTO(out_put_old, rc = -EPERM);
2521 mnew = mdt_object_find(info->mti_env, info->mti_mdt, new_fid);
2523 GOTO(out_put_old, rc = PTR_ERR(mnew));
2525 if (!mdt_object_exists(mnew)) {
2526 LU_OBJECT_DEBUG(D_INODE, info->mti_env,
2528 "object does not exist");
2529 GOTO(out_put_new, rc = -ENOENT);
2532 if (mdt_object_remote(mnew)) {
2533 struct mdt_body *repbody;
2535 /* Always send rename req to the target child MDT */
2536 repbody = req_capsule_server_get(info->mti_pill,
2538 LASSERT(repbody != NULL);
2539 repbody->mbo_fid1 = *new_fid;
2540 repbody->mbo_valid |= (OBD_MD_FLID | OBD_MD_MDS);
2541 GOTO(out_put_new, rc = -EXDEV);
2543 /* Before locking the target dir, check we do not replace
2544 * a dir with a non-dir, otherwise it may deadlock with
2545 * link op which tries to create a link in this dir
2546 * back to this non-dir. */
2547 if (S_ISDIR(lu_object_attr(&mnew->mot_obj)) &&
2548 !S_ISDIR(lu_object_attr(&mold->mot_obj)))
2549 GOTO(out_put_new, rc = -EISDIR);
2551 lh_oldp = &info->mti_lh[MDT_LH_OLD];
2552 mdt_lock_reg_init(lh_oldp, LCK_EX);
2553 lock_ibits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_XATTR;
2554 if (mdt_object_remote(msrcdir)) {
2555 /* Enqueue lookup lock from the parent MDT */
2556 rc = mdt_remote_object_lock(info, msrcdir,
2557 mdt_object_fid(mold),
2558 &lh_oldp->mlh_rreg_lh,
2559 lh_oldp->mlh_rreg_mode,
2560 MDS_INODELOCK_LOOKUP,
2563 GOTO(out_put_new, rc);
2565 lock_ibits &= ~MDS_INODELOCK_LOOKUP;
2568 rc = mdt_reint_object_lock(info, mold, lh_oldp, lock_ibits,
2571 GOTO(out_unlock_old, rc);
2573 /* Check if @msrcdir is subdir of @mnew, before locking child
2574 * to avoid reverse locking. */
2575 if (mtgtdir != msrcdir) {
2576 rc = mdo_is_subdir(info->mti_env,
2577 mdt_object_child(msrcdir), new_fid);
2581 GOTO(out_unlock_old, rc);
2585 /* We used to acquire MDS_INODELOCK_FULL here but we
2586 * can't do this now because a running HSM restore on
2587 * the rename onto victim will hold the layout
2588 * lock. See LU-4002. */
2590 lh_newp = &info->mti_lh[MDT_LH_NEW];
2591 mdt_lock_reg_init(lh_newp, LCK_EX);
2592 rc = mdt_reint_object_lock(info, mnew, lh_newp,
2593 MDS_INODELOCK_LOOKUP |
2594 MDS_INODELOCK_UPDATE,
2597 GOTO(out_unlock_old, rc);
2599 /* get and save version after locking */
2600 mdt_version_get_save(info, mnew, 3);
2601 } else if (rc != -EREMOTE && rc != -ENOENT) {
2602 GOTO(out_put_old, rc);
2604 lh_oldp = &info->mti_lh[MDT_LH_OLD];
2605 mdt_lock_reg_init(lh_oldp, LCK_EX);
2606 lock_ibits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_XATTR;
2607 if (mdt_object_remote(msrcdir)) {
2608 /* Enqueue lookup lock from the parent MDT */
2609 rc = mdt_remote_object_lock(info, msrcdir,
2610 mdt_object_fid(mold),
2611 &lh_oldp->mlh_rreg_lh,
2612 lh_oldp->mlh_rreg_mode,
2613 MDS_INODELOCK_LOOKUP,
2616 GOTO(out_put_old, rc);
2618 lock_ibits &= ~MDS_INODELOCK_LOOKUP;
2621 rc = mdt_reint_object_lock(info, mold, lh_oldp, lock_ibits,
2624 GOTO(out_unlock_old, rc);
2626 mdt_enoent_version_save(info, 3);
2629 /* step 5: rename it */
2630 mdt_reint_init_ma(info, ma);
2632 mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
2633 OBD_FAIL_MDS_REINT_RENAME_WRITE);
2636 mutex_lock(&mnew->mot_lov_mutex);
2638 rc = mdo_rename(info->mti_env, mdt_object_child(msrcdir),
2639 mdt_object_child(mtgtdir), old_fid, &rr->rr_name,
2640 mnew != NULL ? mdt_object_child(mnew) : NULL,
2641 &rr->rr_tgt_name, ma);
2644 mutex_unlock(&mnew->mot_lov_mutex);
2646 /* handle last link of tgt object */
2648 mdt_counter_incr(req, LPROC_MDT_RENAME);
2650 mdt_handle_last_unlink(info, mnew, ma);
2651 discard = mdt_dom_check_for_discard(info, mnew);
2653 mdt_rename_counter_tally(info, info->mti_mdt, req,
2659 mdt_object_unlock(info, mnew, lh_newp, rc);
2661 mdt_object_unlock(info, mold, lh_oldp, rc);
2663 if (mnew && !discard)
2664 mdt_object_put(info->mti_env, mnew);
2666 mdt_object_put(info->mti_env, mold);
2668 mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc);
2669 mdt_object_unlock(info, msrcdir, lh_srcdirp, rc);
2671 if (lustre_handle_is_used(&rename_lh))
2672 mdt_rename_unlock(&rename_lh);
2674 mdt_object_put(info->mti_env, mtgtdir);
2676 mdt_object_put(info->mti_env, msrcdir);
2678 /* The DoM discard can be done right in the place above where it is
2679 * assigned, meanwhile it is done here after rename unlock due to
2680 * compatibility with old clients, for them the discard blocks
2681 * the main thread until completion. Check LU-11359 for details.
2684 mdt_dom_discard_data(info, mnew);
2685 mdt_object_put(info->mti_env, mnew);
2690 static int mdt_reint_resync(struct mdt_thread_info *info,
2691 struct mdt_lock_handle *lhc)
2693 struct mdt_reint_record *rr = &info->mti_rr;
2694 struct ptlrpc_request *req = mdt_info_req(info);
2695 struct md_attr *ma = &info->mti_attr;
2696 struct mdt_object *mo;
2697 struct ldlm_lock *lease;
2698 struct mdt_body *repbody;
2699 struct md_layout_change layout = { .mlc_mirror_id = rr->rr_mirror_id };
2705 DEBUG_REQ(D_INODE, req, DFID", FLR file resync", PFID(rr->rr_fid1));
2707 if (info->mti_dlm_req)
2708 ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP);
2710 mo = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
2712 GOTO(out, rc = PTR_ERR(mo));
2714 if (!mdt_object_exists(mo))
2715 GOTO(out_obj, rc = -ENOENT);
2717 if (!S_ISREG(lu_object_attr(&mo->mot_obj)))
2718 GOTO(out_obj, rc = -EINVAL);
2720 if (mdt_object_remote(mo))
2721 GOTO(out_obj, rc = -EREMOTE);
2723 lease = ldlm_handle2lock(rr->rr_lease_handle);
2725 GOTO(out_obj, rc = -ESTALE);
2727 /* It's really necessary to grab open_sem and check if the lease lock
2728 * has been lost. There would exist a concurrent writer coming in and
2729 * generating some dirty data in memory cache, the writeback would fail
2730 * after the layout version is increased by MDS_REINT_RESYNC RPC. */
2731 if (!down_write_trylock(&mo->mot_open_sem))
2732 GOTO(out_put_lease, rc = -EBUSY);
2734 lock_res_and_lock(lease);
2735 lease_broken = ldlm_is_cancel(lease);
2736 unlock_res_and_lock(lease);
2738 GOTO(out_unlock, rc = -EBUSY);
2740 /* the file has yet opened by anyone else after we took the lease. */
2741 layout.mlc_opc = MD_LAYOUT_RESYNC;
2742 lhc = &info->mti_lh[MDT_LH_LOCAL];
2743 rc = mdt_layout_change(info, mo, lhc, &layout);
2745 GOTO(out_unlock, rc);
2747 mdt_object_unlock(info, mo, lhc, 0);
2749 ma->ma_need = MA_INODE;
2751 rc = mdt_attr_get_complex(info, mo, ma);
2753 GOTO(out_unlock, rc);
2755 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
2756 mdt_pack_attr2body(info, repbody, &ma->ma_attr, mdt_object_fid(mo));
2760 up_write(&mo->mot_open_sem);
2762 LDLM_LOCK_PUT(lease);
2764 mdt_object_put(info->mti_env, mo);
2766 mdt_client_compatibility(info);
2767 rc2 = mdt_fix_reply(info);
2773 struct mdt_reinter {
2774 int (*mr_handler)(struct mdt_thread_info *, struct mdt_lock_handle *);
2775 enum lprocfs_extra_opc mr_extra_opc;
2778 static const struct mdt_reinter mdt_reinters[] = {
2780 .mr_handler = &mdt_reint_setattr,
2781 .mr_extra_opc = MDS_REINT_SETATTR,
2784 .mr_handler = &mdt_reint_create,
2785 .mr_extra_opc = MDS_REINT_CREATE,
2788 .mr_handler = &mdt_reint_link,
2789 .mr_extra_opc = MDS_REINT_LINK,
2792 .mr_handler = &mdt_reint_unlink,
2793 .mr_extra_opc = MDS_REINT_UNLINK,
2796 .mr_handler = &mdt_reint_rename,
2797 .mr_extra_opc = MDS_REINT_RENAME,
2800 .mr_handler = &mdt_reint_open,
2801 .mr_extra_opc = MDS_REINT_OPEN,
2803 [REINT_SETXATTR] = {
2804 .mr_handler = &mdt_reint_setxattr,
2805 .mr_extra_opc = MDS_REINT_SETXATTR,
2808 .mr_handler = &mdt_reint_unlink,
2809 .mr_extra_opc = MDS_REINT_UNLINK,
2812 .mr_handler = &mdt_reint_migrate,
2813 .mr_extra_opc = MDS_REINT_RENAME,
2816 .mr_handler = &mdt_reint_resync,
2817 .mr_extra_opc = MDS_REINT_RESYNC,
2821 int mdt_reint_rec(struct mdt_thread_info *info,
2822 struct mdt_lock_handle *lhc)
2824 const struct mdt_reinter *mr;
2828 if (!(info->mti_rr.rr_opcode < ARRAY_SIZE(mdt_reinters)))
2831 mr = &mdt_reinters[info->mti_rr.rr_opcode];
2832 if (mr->mr_handler == NULL)
2835 rc = (*mr->mr_handler)(info, lhc);
2837 lprocfs_counter_incr(ptlrpc_req2svc(mdt_info_req(info))->srv_stats,
2838 PTLRPC_LAST_CNTR + mr->mr_extra_opc);