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/mdd/mdd_object.c
34 * Lustre Metadata Server (mdd) routines
36 * Author: Wang Di <wangdi@clusterfs.com>
39 #define DEBUG_SUBSYSTEM S_MDS
41 #include <linux/module.h>
43 #include <obd_class.h>
44 #include <obd_support.h>
45 #include <lprocfs_status.h>
46 /* fid_be_cpu(), fid_cpu_to_be(). */
47 #include <lustre_fid.h>
48 #include <lustre_idmap.h>
49 #include <uapi/linux/lustre/lustre_param.h>
50 #include <lustre_mds.h>
52 #include "mdd_internal.h"
54 static const struct lu_object_operations mdd_lu_obj_ops;
56 static int mdd_xattr_get(const struct lu_env *env,
57 struct md_object *obj, struct lu_buf *buf,
60 int mdd_la_get(const struct lu_env *env, struct mdd_object *obj,
65 if (mdd_object_exists(obj) == 0)
68 rc = mdo_attr_get(env, obj, la);
69 if (unlikely(rc != 0)) {
71 obj->mod_flags |= DEAD_OBJ;
75 if (la->la_valid & LA_FLAGS &&
76 la->la_flags & LUSTRE_ORPHAN_FL)
77 obj->mod_flags |= ORPHAN_OBJ | DEAD_OBJ;
82 struct mdd_thread_info *mdd_env_info(const struct lu_env *env)
84 struct mdd_thread_info *info;
86 lu_env_refill((struct lu_env *)env);
87 info = lu_context_key_get(&env->le_ctx, &mdd_thread_key);
88 LASSERT(info != NULL);
92 struct lu_buf *mdd_buf_get(const struct lu_env *env, void *area, ssize_t len)
96 buf = &mdd_env_info(env)->mti_buf[0];
102 const struct lu_buf *mdd_buf_get_const(const struct lu_env *env,
103 const void *area, ssize_t len)
107 buf = &mdd_env_info(env)->mti_buf[0];
108 buf->lb_buf = (void *)area;
113 struct lu_object *mdd_object_alloc(const struct lu_env *env,
114 const struct lu_object_header *hdr,
117 struct mdd_object *mdd_obj;
119 OBD_SLAB_ALLOC_PTR_GFP(mdd_obj, mdd_object_kmem, GFP_NOFS);
120 if (mdd_obj != NULL) {
123 o = mdd2lu_obj(mdd_obj);
124 lu_object_init(o, NULL, d);
125 mdd_obj->mod_obj.mo_ops = &mdd_obj_ops;
126 mdd_obj->mod_obj.mo_dir_ops = &mdd_dir_ops;
127 mdd_obj->mod_count = 0;
128 o->lo_ops = &mdd_lu_obj_ops;
135 static int mdd_object_init(const struct lu_env *env, struct lu_object *o,
136 const struct lu_object_conf *unused)
138 struct mdd_device *d = lu2mdd_dev(o->lo_dev);
139 struct mdd_object *mdd_obj = lu2mdd_obj(o);
140 struct lu_object *below;
141 struct lu_device *under;
144 mdd_obj->mod_cltime = ktime_set(0, 0);
145 under = &d->mdd_child->dd_lu_dev;
146 below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
148 RETURN(PTR_ERR(below));
150 lu_object_add(o, below);
155 static int mdd_object_start(const struct lu_env *env, struct lu_object *o)
159 if (lu_object_exists(o)) {
160 struct mdd_object *mdd_obj = lu2mdd_obj(o);
161 struct lu_attr *attr = MDD_ENV_VAR(env, la_for_start);
163 rc = mdd_la_get(env, mdd_obj, attr);
169 static void mdd_object_free(const struct lu_env *env, struct lu_object *o)
171 struct mdd_object *mdd = lu2mdd_obj(o);
174 OBD_SLAB_FREE_PTR(mdd, mdd_object_kmem);
177 static int mdd_object_print(const struct lu_env *env, void *cookie,
178 lu_printer_t p, const struct lu_object *o)
180 struct mdd_object *mdd = lu2mdd_obj((struct lu_object *)o);
182 return (*p)(env, cookie,
183 LUSTRE_MDD_NAME"-object@%p(open_count=%d, valid=%x, cltime=%lldns, flags=%lx)",
184 mdd, mdd->mod_count, mdd->mod_valid,
185 ktime_to_ns(mdd->mod_cltime), mdd->mod_flags);
188 static const struct lu_object_operations mdd_lu_obj_ops = {
189 .loo_object_init = mdd_object_init,
190 .loo_object_start = mdd_object_start,
191 .loo_object_free = mdd_object_free,
192 .loo_object_print = mdd_object_print,
195 struct mdd_object *mdd_object_find(const struct lu_env *env,
196 struct mdd_device *d,
197 const struct lu_fid *f)
199 return md2mdd_obj(md_object_find_slice(env, &d->mdd_md_dev, f));
203 * No permission check is needed.
205 int mdd_attr_get(const struct lu_env *env, struct md_object *obj,
208 struct mdd_object *mdd_obj = md2mdd_obj(obj);
213 rc = mdd_la_get(env, mdd_obj, &ma->ma_attr);
214 if ((ma->ma_need & MA_INODE) != 0 && mdd_is_dead_obj(mdd_obj))
215 ma->ma_attr.la_nlink = 0;
221 * No permission check is needed.
223 static int mdd_xattr_get(const struct lu_env *env,
224 struct md_object *obj, struct lu_buf *buf,
227 struct mdd_object *mdd_obj = md2mdd_obj(obj);
232 if (mdd_object_exists(mdd_obj) == 0) {
233 CERROR("%s: object "DFID" not found: rc = -2\n",
234 mdd_obj_dev_name(mdd_obj),PFID(mdd_object_fid(mdd_obj)));
238 /* If the object has been destroyed, then do not get LMVEA, because
239 * it needs to load stripes from the iteration of the master object,
240 * and it will cause problem if master object has been destroyed, see
242 if (unlikely((mdd_obj->mod_flags & DEAD_OBJ) &&
243 !(mdd_obj->mod_flags & ORPHAN_OBJ) &&
244 strcmp(name, XATTR_NAME_LMV) == 0))
247 /* If the object has been delete from the namespace, then
248 * get linkEA should return -ENOENT as well */
249 if (unlikely((mdd_obj->mod_flags & (DEAD_OBJ | ORPHAN_OBJ)) &&
250 strcmp(name, XATTR_NAME_LINK) == 0))
253 mdd_read_lock(env, mdd_obj, MOR_TGT_CHILD);
254 rc = mdo_xattr_get(env, mdd_obj, buf, name);
255 mdd_read_unlock(env, mdd_obj);
261 * Permission check is done when open,
262 * no need check again.
264 int mdd_readlink(const struct lu_env *env, struct md_object *obj,
267 struct mdd_object *mdd_obj = md2mdd_obj(obj);
268 struct dt_object *next;
273 if (mdd_object_exists(mdd_obj) == 0) {
274 CERROR("%s: object "DFID" not found: rc = -2\n",
275 mdd_obj_dev_name(mdd_obj),PFID(mdd_object_fid(mdd_obj)));
279 next = mdd_object_child(mdd_obj);
280 LASSERT(next != NULL);
281 LASSERT(next->do_body_ops != NULL);
282 LASSERT(next->do_body_ops->dbo_read != NULL);
283 mdd_read_lock(env, mdd_obj, MOR_TGT_CHILD);
284 rc = dt_read(env, next, buf, &pos);
285 mdd_read_unlock(env, mdd_obj);
290 * No permission check is needed.
292 static int mdd_xattr_list(const struct lu_env *env, struct md_object *obj,
295 struct mdd_object *mdd_obj = md2mdd_obj(obj);
300 mdd_read_lock(env, mdd_obj, MOR_TGT_CHILD);
301 rc = mdo_xattr_list(env, mdd_obj, buf);
302 mdd_read_unlock(env, mdd_obj);
304 /* If the buffer is NULL then we are only here to get the
305 * length of the xattr name list. */
306 if (rc < 0 || buf->lb_buf == NULL)
310 * Filter out XATTR_NAME_LINK if this is an orphan object. See
313 if (unlikely(mdd_obj->mod_flags & (DEAD_OBJ | ORPHAN_OBJ))) {
314 char *end = (char *)buf->lb_buf + rc;
315 char *p = buf->lb_buf;
318 char *next = p + strlen(p) + 1;
320 if (strcmp(p, XATTR_NAME_LINK) == 0) {
322 memmove(p, next, end - next);
324 CDEBUG(D_INFO, "Filtered out "XATTR_NAME_LINK
325 " of orphan "DFID"\n",
326 PFID(mdd_object_fid(mdd_obj)));
337 int mdd_invalidate(const struct lu_env *env, struct md_object *obj)
339 return mdo_invalidate(env, md2mdd_obj(obj));
342 int mdd_declare_create_object_internal(const struct lu_env *env,
343 struct mdd_object *p,
344 struct mdd_object *c,
345 struct lu_attr *attr,
346 struct thandle *handle,
347 const struct md_op_spec *spec,
348 struct dt_allocation_hint *hint)
350 struct dt_object_format *dof = &mdd_env_info(env)->mti_dof;
351 const struct dt_index_features *feat = spec->sp_feat;
355 if (feat != &dt_directory_features && feat != NULL) {
356 dof->dof_type = DFT_INDEX;
357 dof->u.dof_idx.di_feat = feat;
359 dof->dof_type = dt_mode_to_dft(attr->la_mode);
360 if (dof->dof_type == DFT_REGULAR) {
361 dof->u.dof_reg.striped =
362 md_should_create(spec->sp_cr_flags);
363 if (spec->sp_cr_flags & MDS_OPEN_HAS_EA)
364 dof->u.dof_reg.striped = 0;
365 /* is this replay? */
367 dof->u.dof_reg.striped = 0;
371 rc = mdo_declare_create_object(env, c, attr, hint, dof, handle);
376 int mdd_create_object_internal(const struct lu_env *env, struct mdd_object *p,
377 struct mdd_object *c, struct lu_attr *attr,
378 struct thandle *handle,
379 const struct md_op_spec *spec,
380 struct dt_allocation_hint *hint)
382 struct dt_object_format *dof = &mdd_env_info(env)->mti_dof;
386 LASSERT(!mdd_object_exists(c));
388 rc = mdo_create_object(env, c, attr, hint, dof, handle);
393 int mdd_attr_set_internal(const struct lu_env *env, struct mdd_object *obj,
394 const struct lu_attr *attr, struct thandle *handle,
400 rc = mdo_attr_set(env, obj, attr, handle);
401 #ifdef CONFIG_FS_POSIX_ACL
402 if (!rc && (attr->la_valid & LA_MODE) && needacl)
403 rc = mdd_acl_chmod(env, obj, attr->la_mode, handle);
408 int mdd_update_time(const struct lu_env *env, struct mdd_object *obj,
409 const struct lu_attr *oattr, struct lu_attr *attr,
410 struct thandle *handle)
415 LASSERT(attr->la_valid & LA_CTIME);
416 LASSERT(oattr != NULL);
418 /* Make sure the ctime is increased only, however, it's not strictly
419 * reliable at here because there is not guarantee to hold lock on
420 * object, so we just bypass some unnecessary cmtime setting first
421 * and OSD has to check it again. */
422 if (attr->la_ctime < oattr->la_ctime)
423 attr->la_valid &= ~(LA_MTIME | LA_CTIME);
424 else if (attr->la_valid == LA_CTIME &&
425 attr->la_ctime == oattr->la_ctime)
426 attr->la_valid &= ~LA_CTIME;
428 if (attr->la_valid != 0)
429 rc = mdd_attr_set_internal(env, obj, attr, handle, 0);
434 * This gives the same functionality as the code between
435 * sys_chmod and inode_setattr
436 * chown_common and inode_setattr
437 * utimes and inode_setattr
438 * This API is ported from mds_fix_attr but remove some unnecesssary stuff.
440 static int mdd_fix_attr(const struct lu_env *env, struct mdd_object *obj,
441 const struct lu_attr *oattr, struct lu_attr *la,
442 const unsigned long flags)
451 /* Do not permit change file type */
452 if (la->la_valid & LA_TYPE)
455 /* They should not be processed by setattr */
456 if (la->la_valid & (LA_NLINK | LA_RDEV | LA_BLKSIZE))
459 LASSERT(oattr != NULL);
461 uc = lu_ucred_check(env);
465 if (la->la_valid == LA_CTIME) {
466 if (!(flags & MDS_PERM_BYPASS))
467 /* This is only for set ctime when rename's source is
469 rc = mdd_may_delete(env, NULL, NULL, obj, oattr, NULL,
471 if (rc == 0 && la->la_ctime <= oattr->la_ctime)
472 la->la_valid &= ~LA_CTIME;
476 if (la->la_valid == LA_ATIME) {
477 /* This is an atime-only attribute update for close RPCs. */
478 if (la->la_atime < (oattr->la_atime +
479 mdd_obj2mdd_dev(obj)->mdd_atime_diff))
480 la->la_valid &= ~LA_ATIME;
484 /* Check if flags change. */
485 if (la->la_valid & LA_FLAGS) {
486 unsigned int oldflags = oattr->la_flags &
487 (LUSTRE_IMMUTABLE_FL | LUSTRE_APPEND_FL);
488 unsigned int newflags = la->la_flags &
489 (LUSTRE_IMMUTABLE_FL | LUSTRE_APPEND_FL);
491 if ((uc->uc_fsuid != oattr->la_uid) &&
492 !md_capable(uc, CFS_CAP_FOWNER))
495 /* The IMMUTABLE and APPEND_ONLY flags can
496 * only be changed by the relevant capability. */
497 if ((oldflags ^ newflags) &&
498 !md_capable(uc, CFS_CAP_LINUX_IMMUTABLE))
501 if (!S_ISDIR(oattr->la_mode))
502 la->la_flags &= ~(LUSTRE_DIRSYNC_FL | LUSTRE_TOPDIR_FL);
505 if (oattr->la_flags & (LUSTRE_IMMUTABLE_FL | LUSTRE_APPEND_FL) &&
506 (la->la_valid & ~LA_FLAGS) &&
507 !(flags & MDS_PERM_BYPASS))
510 /* Check for setting the obj time. */
511 if ((la->la_valid & (LA_MTIME | LA_ATIME | LA_CTIME)) &&
512 !(la->la_valid & ~(LA_MTIME | LA_ATIME | LA_CTIME))) {
513 if ((uc->uc_fsuid != oattr->la_uid) &&
514 !md_capable(uc, CFS_CAP_FOWNER)) {
515 rc = mdd_permission_internal(env, obj, oattr,
522 if (la->la_valid & LA_KILL_SUID) {
523 la->la_valid &= ~LA_KILL_SUID;
524 if ((oattr->la_mode & S_ISUID) &&
525 !(la->la_valid & LA_MODE)) {
526 la->la_mode = oattr->la_mode;
527 la->la_valid |= LA_MODE;
529 la->la_mode &= ~S_ISUID;
532 if (la->la_valid & LA_KILL_SGID) {
533 la->la_valid &= ~LA_KILL_SGID;
534 if (((oattr->la_mode & (S_ISGID | S_IXGRP)) ==
535 (S_ISGID | S_IXGRP)) &&
536 !(la->la_valid & LA_MODE)) {
537 la->la_mode = oattr->la_mode;
538 la->la_valid |= LA_MODE;
540 la->la_mode &= ~S_ISGID;
543 /* Make sure a caller can chmod. */
544 if (la->la_valid & LA_MODE) {
545 if (!(flags & MDS_PERM_BYPASS) &&
546 (uc->uc_fsuid != oattr->la_uid) &&
547 !md_capable(uc, CFS_CAP_FOWNER))
550 if (la->la_mode == (umode_t) -1)
551 la->la_mode = oattr->la_mode;
553 la->la_mode = (la->la_mode & S_IALLUGO) |
554 (oattr->la_mode & ~S_IALLUGO);
556 /* Also check the setgid bit! */
557 if (!lustre_in_group_p(uc, (la->la_valid & LA_GID) ?
558 la->la_gid : oattr->la_gid) &&
559 !md_capable(uc, CFS_CAP_FSETID))
560 la->la_mode &= ~S_ISGID;
562 la->la_mode = oattr->la_mode;
565 /* Make sure a caller can chown. */
566 if (la->la_valid & LA_UID) {
567 if (la->la_uid == (uid_t) -1)
568 la->la_uid = oattr->la_uid;
569 if (((uc->uc_fsuid != oattr->la_uid) ||
570 (la->la_uid != oattr->la_uid)) &&
571 !md_capable(uc, CFS_CAP_CHOWN))
574 /* If the user or group of a non-directory has been
575 * changed by a non-root user, remove the setuid bit.
576 * 19981026 David C Niemi <niemi@tux.org>
578 * Changed this to apply to all users, including root,
579 * to avoid some races. This is the behavior we had in
580 * 2.0. The check for non-root was definitely wrong
581 * for 2.2 anyway, as it should have been using
582 * CAP_FSETID rather than fsuid -- 19990830 SD. */
583 if (((oattr->la_mode & S_ISUID) == S_ISUID) &&
584 !S_ISDIR(oattr->la_mode)) {
585 la->la_mode &= ~S_ISUID;
586 la->la_valid |= LA_MODE;
590 /* Make sure caller can chgrp. */
591 if (la->la_valid & LA_GID) {
592 if (la->la_gid == (gid_t) -1)
593 la->la_gid = oattr->la_gid;
594 if (((uc->uc_fsuid != oattr->la_uid) ||
595 ((la->la_gid != oattr->la_gid) &&
596 !lustre_in_group_p(uc, la->la_gid))) &&
597 !md_capable(uc, CFS_CAP_CHOWN))
600 /* Likewise, if the user or group of a non-directory
601 * has been changed by a non-root user, remove the
602 * setgid bit UNLESS there is no group execute bit
603 * (this would be a file marked for mandatory
604 * locking). 19981026 David C Niemi <niemi@tux.org>
606 * Removed the fsuid check (see the comment above) --
608 if (((oattr->la_mode & (S_ISGID | S_IXGRP)) ==
609 (S_ISGID | S_IXGRP)) && !S_ISDIR(oattr->la_mode)) {
610 la->la_mode &= ~S_ISGID;
611 la->la_valid |= LA_MODE;
615 if (la->la_valid & (LA_SIZE | LA_BLOCKS)) {
616 if (!((flags & MDS_OWNEROVERRIDE) &&
617 (uc->uc_fsuid == oattr->la_uid)) &&
618 !(flags & MDS_PERM_BYPASS)) {
619 rc = mdd_permission_internal(env, obj, oattr,
626 if (la->la_valid & LA_CTIME) {
627 /* The pure setattr, it has the priority over what is
628 * already set, do not drop it if ctime is equal. */
629 if (la->la_ctime < oattr->la_ctime)
630 la->la_valid &= ~(LA_ATIME | LA_MTIME | LA_CTIME);
636 static int mdd_changelog_data_store_by_fid(const struct lu_env *env,
637 struct mdd_device *mdd,
638 enum changelog_rec_type type, int flags,
639 const struct lu_fid *fid,
640 struct thandle *handle)
642 const struct lu_ucred *uc = lu_ucred(env);
643 struct llog_changelog_rec *rec;
646 int xflags = CLFE_INVALID;
649 flags = (flags & CLF_FLAGMASK) | CLF_VERSION | CLF_EXTRA_FLAGS;
652 if (uc->uc_jobid[0] != '\0')
654 xflags |= CLFE_UIDGID;
660 reclen = llog_data_len(LLOG_CHANGELOG_HDR_SZ +
661 changelog_rec_offset(flags & CLF_SUPPORTED,
662 xflags & CLFE_SUPPORTED));
663 buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_big_buf, reclen);
664 if (buf->lb_buf == NULL)
668 rec->cr_hdr.lrh_len = reclen;
669 rec->cr.cr_flags = flags;
670 rec->cr.cr_type = (__u32)type;
671 rec->cr.cr_tfid = *fid;
672 rec->cr.cr_namelen = 0;
674 if (flags & CLF_JOBID)
675 mdd_changelog_rec_ext_jobid(&rec->cr, uc->uc_jobid);
677 if (flags & CLF_EXTRA_FLAGS) {
678 mdd_changelog_rec_ext_extra_flags(&rec->cr, xflags);
679 if (xflags & CLFE_UIDGID)
680 mdd_changelog_rec_extra_uidgid(&rec->cr,
681 uc->uc_uid, uc->uc_gid);
682 if (xflags & CLFE_NID)
683 mdd_changelog_rec_extra_nid(&rec->cr, uc->uc_nid);
684 if (xflags & CLFE_OPEN)
685 mdd_changelog_rec_extra_omode(&rec->cr, flags);
688 rc = mdd_changelog_store(env, mdd, rec, handle);
693 /** Store a data change changelog record
694 * If this fails, we must fail the whole transaction; we don't
695 * want the change to commit without the log entry.
696 * \param mdd_obj - mdd_object of change
697 * \param handle - transaction handle
699 int mdd_changelog_data_store(const struct lu_env *env, struct mdd_device *mdd,
700 enum changelog_rec_type type, int flags,
701 struct mdd_object *mdd_obj, struct thandle *handle)
705 LASSERT(mdd_obj != NULL);
706 LASSERT(handle != NULL);
709 if (!(mdd->mdd_cl.mc_flags & CLM_ON))
711 if ((mdd->mdd_cl.mc_mask & (1 << type)) == 0)
714 if (mdd_is_volatile_obj(mdd_obj))
717 if ((type >= CL_MTIME) && (type <= CL_ATIME) &&
718 ktime_before(mdd->mdd_cl.mc_starttime, mdd_obj->mod_cltime)) {
719 /* Don't need multiple updates in this log */
720 /* Don't check under lock - no big deal if we get an extra
725 rc = mdd_changelog_data_store_by_fid(env, mdd, type, flags,
726 mdo2fid(mdd_obj), handle);
728 mdd_obj->mod_cltime = ktime_get();
733 static int mdd_changelog(const struct lu_env *env, enum changelog_rec_type type,
734 int flags, struct md_device *m, const struct lu_fid *fid)
736 struct thandle *handle;
737 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
742 if (!(mdd->mdd_cl.mc_flags & CLM_ON))
744 if (!(mdd->mdd_cl.mc_mask & (1 << type)))
747 LASSERT(fid != NULL);
749 handle = mdd_trans_create(env, mdd);
751 RETURN(PTR_ERR(handle));
753 rc = mdd_declare_changelog_store(env, mdd, NULL, NULL, handle);
757 rc = mdd_trans_start(env, mdd, handle);
761 rc = mdd_changelog_data_store_by_fid(env, mdd, type, flags,
765 rc = mdd_trans_stop(env, mdd, rc, handle);
771 * Save LMA extended attributes with data from \a ma.
773 * HSM and Size-On-MDS data will be extracted from \ma if they are valid, if
774 * not, LMA EA will be first read from disk, modified and write back.
777 /* Precedence for choosing record type when multiple
778 * attributes change: setattr > mtime > ctime > atime
779 * (ctime changes when mtime does, plus chmod/chown.
780 * atime and ctime are independent.) */
781 static int mdd_attr_set_changelog(const struct lu_env *env,
782 struct md_object *obj, struct thandle *handle,
785 struct mdd_device *mdd = mdo2mdd(obj);
788 bits = (valid & LA_SIZE) ? 1 << CL_TRUNC : 0;
789 bits |= (valid & ~(LA_CTIME|LA_MTIME|LA_ATIME)) ? 1 << CL_SETATTR : 0;
790 bits |= (valid & LA_MTIME) ? 1 << CL_MTIME : 0;
791 bits |= (valid & LA_CTIME) ? 1 << CL_CTIME : 0;
792 bits |= (valid & LA_ATIME) ? 1 << CL_ATIME : 0;
793 bits = bits & mdd->mdd_cl.mc_mask;
794 /* This is an implementation limit rather than a protocol limit */
795 CLASSERT(CL_LAST <= sizeof(int) * 8);
799 /* The record type is the lowest non-masked set bit */
802 /* FYI we only store the first CLF_FLAGMASK bits of la_valid */
803 return mdd_changelog_data_store(env, mdd, type, (int)valid,
804 md2mdd_obj(obj), handle);
807 static int mdd_declare_attr_set(const struct lu_env *env,
808 struct mdd_device *mdd,
809 struct mdd_object *obj,
810 const struct lu_attr *attr,
811 struct thandle *handle)
815 rc = mdo_declare_attr_set(env, obj, attr, handle);
819 #ifdef CONFIG_FS_POSIX_ACL
820 if (attr->la_valid & LA_MODE) {
821 mdd_read_lock(env, obj, MOR_TGT_CHILD);
822 rc = mdo_xattr_get(env, obj, &LU_BUF_NULL,
823 XATTR_NAME_ACL_ACCESS);
824 mdd_read_unlock(env, obj);
825 if (rc == -EOPNOTSUPP || rc == -ENODATA)
831 struct lu_buf *buf = mdd_buf_get(env, NULL, rc);
832 rc = mdo_declare_xattr_set(env, obj, buf,
833 XATTR_NAME_ACL_ACCESS, 0,
841 rc = mdd_declare_changelog_store(env, mdd, NULL, NULL, handle);
848 * permission changes may require sync operation, to mitigate performance
849 * impact, only do this for dir and when permission is reduced.
851 * For regular files, version is updated with permission change (see VBR), async
852 * permission won't cause any issue, while missing permission change on
853 * directory may affect accessibility of other objects after recovery.
855 static inline bool permission_needs_sync(const struct lu_attr *old,
856 const struct lu_attr *new)
858 if (!S_ISDIR(old->la_mode))
861 if (new->la_valid & (LA_UID | LA_GID))
864 if (new->la_valid & LA_MODE &&
865 new->la_mode & (S_ISUID | S_ISGID | S_ISVTX))
868 if ((new->la_valid & LA_MODE) &&
869 ((new->la_mode & old->la_mode) & S_IRWXUGO) !=
870 (old->la_mode & S_IRWXUGO))
876 /* set attr and LOV EA at once, return updated attr */
877 int mdd_attr_set(const struct lu_env *env, struct md_object *obj,
878 const struct md_attr *ma)
880 struct mdd_object *mdd_obj = md2mdd_obj(obj);
881 struct mdd_device *mdd = mdo2mdd(obj);
882 struct thandle *handle = NULL;
883 struct lu_attr *la_copy = &mdd_env_info(env)->mti_la_for_fix;
884 struct lu_attr *attr = MDD_ENV_VAR(env, cattr);
885 const struct lu_attr *la = &ma->ma_attr;
890 /* we do not use ->attr_set() for LOV/HSM EA any more */
891 LASSERT((ma->ma_valid & MA_LOV) == 0);
892 LASSERT((ma->ma_valid & MA_HSM) == 0);
894 rc = mdd_la_get(env, mdd_obj, attr);
898 *la_copy = ma->ma_attr;
899 rc = mdd_fix_attr(env, mdd_obj, attr, la_copy, ma->ma_attr_flags);
903 /* no need to setattr anymore */
904 if (la_copy->la_valid == 0) {
905 CDEBUG(D_INODE, "%s: no valid attribute on "DFID", previous"
906 "valid is %#llx\n", mdd2obd_dev(mdd)->obd_name,
907 PFID(mdo2fid(mdd_obj)), la->la_valid);
912 /* If an unprivileged user changes group of some file,
913 * the setattr operation will be processed synchronously to
914 * honor the quota limit of the corresponding group. see LU-5152 */
915 uc = lu_ucred_check(env);
916 if (S_ISREG(attr->la_mode) && la->la_valid & LA_GID &&
917 la->la_gid != attr->la_gid && uc != NULL && uc->uc_fsuid != 0) {
918 la_copy->la_valid |= LA_FLAGS;
919 la_copy->la_flags |= LUSTRE_SET_SYNC_FL;
921 /* Flush the possible existing sync requests to OSTs to
922 * keep the order of sync for the current setattr operation
923 * will be sent directly to OSTs. see LU-5152 */
924 rc = dt_sync(env, mdd->mdd_child);
929 handle = mdd_trans_create(env, mdd);
930 if (IS_ERR(handle)) {
931 rc = PTR_ERR(handle);
937 rc = mdd_declare_attr_set(env, mdd, mdd_obj, la_copy, handle);
941 rc = mdd_trans_start(env, mdd, handle);
945 if (mdd->mdd_sync_permission && permission_needs_sync(attr, la))
948 if (la->la_valid & (LA_MTIME | LA_CTIME))
949 CDEBUG(D_INODE, "setting mtime %llu, ctime %llu\n",
950 la->la_mtime, la->la_ctime);
952 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
953 if (la_copy->la_valid) {
954 rc = mdd_attr_set_internal(env, mdd_obj, la_copy, handle, 1);
956 if (rc == -EDQUOT && la_copy->la_flags & LUSTRE_SET_SYNC_FL) {
957 /* rollback to the original gid */
958 la_copy->la_flags &= ~LUSTRE_SET_SYNC_FL;
959 la_copy->la_gid = attr->la_gid;
960 mdd_attr_set_internal(env, mdd_obj, la_copy, handle, 1);
963 mdd_write_unlock(env, mdd_obj);
967 rc = mdd_attr_set_changelog(env, obj, handle,
971 rc = mdd_trans_stop(env, mdd, rc, handle);
976 static int mdd_xattr_sanity_check(const struct lu_env *env,
977 struct mdd_object *obj,
978 const struct lu_attr *attr,
981 struct lu_ucred *uc = lu_ucred_assert(env);
984 if (attr->la_flags & (LUSTRE_IMMUTABLE_FL | LUSTRE_APPEND_FL))
987 if (strncmp(XATTR_USER_PREFIX, name,
988 sizeof(XATTR_USER_PREFIX) - 1) == 0) {
989 /* For sticky directories, only the owner and privileged user
990 * can write attributes. */
991 if (S_ISDIR(attr->la_mode) && (attr->la_mode & S_ISVTX) &&
992 (uc->uc_fsuid != attr->la_uid) &&
993 !md_capable(uc, CFS_CAP_FOWNER))
996 if ((uc->uc_fsuid != attr->la_uid) &&
997 !md_capable(uc, CFS_CAP_FOWNER))
1005 * Check if a string begins with a given prefix.
1007 * \param str String to check
1008 * \param prefix Substring to check at the beginning of \a str
1009 * \return true/false whether the condition is verified.
1011 static inline bool has_prefix(const char *str, const char *prefix)
1013 return strncmp(prefix, str, strlen(prefix)) == 0;
1017 * Indicate the kind of changelog to store (if any) for a xattr set/del.
1019 * \param[in] xattr_name Full extended attribute name.
1021 * \return The type of changelog to use, or -1 if no changelog is to be emitted.
1023 static enum changelog_rec_type
1024 mdd_xattr_changelog_type(const struct lu_env *env, struct mdd_device *mdd,
1025 const char *xattr_name)
1027 /* Layout changes systematically recorded */
1028 if (strcmp(XATTR_NAME_LOV, xattr_name) == 0 ||
1029 strncmp(XATTR_LUSTRE_LOV, xattr_name,
1030 strlen(XATTR_LUSTRE_LOV)) == 0)
1033 /* HSM information changes systematically recorded */
1034 if (strcmp(XATTR_NAME_HSM, xattr_name) == 0)
1037 if (has_prefix(xattr_name, XATTR_USER_PREFIX) ||
1038 has_prefix(xattr_name, XATTR_NAME_POSIX_ACL_ACCESS) ||
1039 has_prefix(xattr_name, XATTR_NAME_POSIX_ACL_DEFAULT))
1045 static int mdd_declare_xattr_set(const struct lu_env *env,
1046 struct mdd_device *mdd,
1047 struct mdd_object *obj,
1048 const struct lu_buf *buf,
1050 int fl, struct thandle *handle)
1054 rc = mdo_declare_xattr_set(env, obj, buf, name, fl, handle);
1058 if (mdd_xattr_changelog_type(env, mdd, name) < 0)
1059 return 0; /* no changelog to store */
1061 return mdd_declare_changelog_store(env, mdd, NULL, NULL, handle);
1065 * Compare current and future data of HSM EA and add a changelog if needed.
1067 * Caller should have write-locked \param obj.
1069 * \param buf - Future HSM EA content.
1070 * \retval 0 if no changelog is needed or changelog was added properly.
1071 * \retval -ve errno if there was a problem
1073 static int mdd_hsm_update_locked(const struct lu_env *env,
1074 struct md_object *obj,
1075 const struct lu_buf *buf,
1076 struct thandle *handle, int *cl_flags)
1078 struct mdd_thread_info *info = mdd_env_info(env);
1079 struct mdd_object *mdd_obj = md2mdd_obj(obj);
1080 struct lu_buf *current_buf;
1081 struct md_hsm *current_mh;
1082 struct md_hsm *new_mh;
1086 OBD_ALLOC_PTR(current_mh);
1087 if (current_mh == NULL)
1090 /* Read HSM attrs from disk */
1091 current_buf = lu_buf_check_and_alloc(&info->mti_xattr_buf,
1092 mdo2mdd(obj)->mdd_dt_conf.ddp_max_ea_size);
1093 rc = mdo_xattr_get(env, mdd_obj, current_buf, XATTR_NAME_HSM);
1094 rc = lustre_buf2hsm(current_buf->lb_buf, rc, current_mh);
1095 if (rc < 0 && rc != -ENODATA)
1097 else if (rc == -ENODATA)
1098 current_mh->mh_flags = 0;
1100 /* Map future HSM xattr */
1101 OBD_ALLOC_PTR(new_mh);
1103 GOTO(free, rc = -ENOMEM);
1104 lustre_buf2hsm(buf->lb_buf, buf->lb_len, new_mh);
1108 /* Flags differ, set flags for the changelog that will be added */
1109 if (current_mh->mh_flags != new_mh->mh_flags) {
1110 hsm_set_cl_event(cl_flags, HE_STATE);
1111 if (new_mh->mh_flags & HS_DIRTY)
1112 hsm_set_cl_flags(cl_flags, CLF_HSM_DIRTY);
1115 OBD_FREE_PTR(new_mh);
1118 OBD_FREE_PTR(current_mh);
1122 static int mdd_object_pfid_replace(const struct lu_env *env,
1123 struct mdd_object *o)
1125 struct mdd_device *mdd = mdo2mdd(&o->mod_obj);
1126 struct thandle *handle;
1129 handle = mdd_trans_create(env, mdd);
1131 RETURN(PTR_ERR(handle));
1133 handle->th_complex = 1;
1135 /* it doesn't need to track the PFID update via llog, because LFSCK
1136 * will repair it even it goes wrong */
1137 rc = mdd_declare_xattr_set(env, mdd, o, NULL, XATTR_NAME_FID,
1142 rc = mdd_trans_start(env, mdd, handle);
1146 rc = mdo_xattr_set(env, o, NULL, XATTR_NAME_FID, 0, handle);
1151 mdd_trans_stop(env, mdd, rc, handle);
1156 static int mdd_declare_xattr_del(const struct lu_env *env,
1157 struct mdd_device *mdd,
1158 struct mdd_object *obj,
1160 struct thandle *handle);
1162 static int mdd_xattr_del(const struct lu_env *env, struct md_object *obj,
1165 static int mdd_xattr_merge(const struct lu_env *env, struct md_object *md_obj,
1166 struct md_object *md_vic)
1168 struct mdd_device *mdd = mdo2mdd(md_obj);
1169 struct mdd_object *obj = md2mdd_obj(md_obj);
1170 struct mdd_object *vic = md2mdd_obj(md_vic);
1171 struct lu_buf *buf = &mdd_env_info(env)->mti_buf[0];
1172 struct lu_buf *buf_vic = &mdd_env_info(env)->mti_buf[1];
1173 struct lov_mds_md *lmm;
1174 struct thandle *handle;
1178 rc = lu_fid_cmp(mdo2fid(obj), mdo2fid(vic));
1179 if (rc == 0) /* same fid */
1182 handle = mdd_trans_create(env, mdd);
1184 RETURN(PTR_ERR(handle));
1187 mdd_write_lock(env, obj, MOR_TGT_CHILD);
1188 mdd_write_lock(env, vic, MOR_TGT_CHILD);
1190 mdd_write_lock(env, vic, MOR_TGT_CHILD);
1191 mdd_write_lock(env, obj, MOR_TGT_CHILD);
1194 /* get EA of victim file */
1195 memset(buf_vic, 0, sizeof(*buf_vic));
1196 rc = mdd_get_lov_ea(env, vic, buf_vic);
1203 /* parse the layout of victim file */
1204 lmm = buf_vic->lb_buf;
1205 if (le32_to_cpu(lmm->lmm_magic) != LOV_MAGIC_COMP_V1)
1206 GOTO(out, rc = -EINVAL);
1208 /* save EA of target file for restore */
1209 memset(buf, 0, sizeof(*buf));
1210 rc = mdd_get_lov_ea(env, obj, buf);
1214 /* Get rid of the layout from victim object */
1215 rc = mdd_declare_xattr_del(env, mdd, vic, XATTR_NAME_LOV, handle);
1219 rc = mdd_declare_xattr_set(env, mdd, obj, buf_vic, XATTR_LUSTRE_LOV,
1220 LU_XATTR_MERGE, handle);
1224 rc = mdd_trans_start(env, mdd, handle);
1228 rc = mdo_xattr_set(env, obj, buf_vic, XATTR_LUSTRE_LOV, LU_XATTR_MERGE,
1233 rc = mdo_xattr_del(env, vic, XATTR_NAME_LOV, handle);
1235 GOTO(out_restore, rc);
1237 (void)mdd_changelog_data_store(env, mdd, CL_LAYOUT, 0, obj, handle);
1238 (void)mdd_changelog_data_store(env, mdd, CL_LAYOUT, 0, vic, handle);
1243 int rc2 = mdo_xattr_set(env, obj, buf, XATTR_NAME_LOV,
1244 LU_XATTR_REPLACE, handle);
1246 CERROR("%s: failed to rollback of layout of: "DFID
1247 ": %d, file state unknown\n",
1248 mdd_obj_dev_name(obj), PFID(mdo2fid(obj)), rc2);
1252 mdd_trans_stop(env, mdd, rc, handle);
1253 mdd_write_unlock(env, obj);
1254 mdd_write_unlock(env, vic);
1256 lu_buf_free(buf_vic);
1259 (void) mdd_object_pfid_replace(env, obj);
1264 static int mdd_layout_merge_allowed(const struct lu_env *env,
1265 struct md_object *target,
1266 struct md_object *victim)
1268 struct mdd_object *o1 = md2mdd_obj(target);
1270 /* cannot extend directory's LOVEA */
1271 if (S_ISDIR(mdd_object_type(o1))) {
1272 CERROR("%s: Don't extend directory's LOVEA, just set it.\n",
1273 mdd_obj_dev_name(o1));
1281 * The caller should guarantee to update the object ctime
1282 * after xattr_set if needed.
1284 static int mdd_xattr_set(const struct lu_env *env, struct md_object *obj,
1285 const struct lu_buf *buf, const char *name,
1288 struct mdd_object *mdd_obj = md2mdd_obj(obj);
1289 struct lu_attr *attr = MDD_ENV_VAR(env, cattr);
1290 struct mdd_device *mdd = mdo2mdd(obj);
1291 struct thandle *handle;
1292 enum changelog_rec_type cl_type;
1297 rc = mdd_la_get(env, mdd_obj, attr);
1301 rc = mdd_xattr_sanity_check(env, mdd_obj, attr, name);
1305 if (strcmp(name, XATTR_LUSTRE_LOV) == 0 && fl == LU_XATTR_MERGE) {
1306 struct md_object *victim = buf->lb_buf;
1308 if (buf->lb_len != sizeof(victim))
1311 rc = mdd_layout_merge_allowed(env, obj, victim);
1315 /* merge layout of victim as a mirror of obj's. */
1316 rc = mdd_xattr_merge(env, obj, victim);
1320 if (strcmp(name, XATTR_NAME_ACL_ACCESS) == 0 ||
1321 strcmp(name, XATTR_NAME_ACL_DEFAULT) == 0) {
1322 struct posix_acl *acl;
1324 /* user may set empty ACL, which should be treated as removing
1326 acl = posix_acl_from_xattr(&init_user_ns, buf->lb_buf,
1329 RETURN(PTR_ERR(acl));
1331 rc = mdd_xattr_del(env, obj, name);
1334 posix_acl_release(acl);
1337 if (!strcmp(name, XATTR_NAME_ACL_ACCESS)) {
1338 rc = mdd_acl_set(env, mdd_obj, attr, buf, fl);
1342 handle = mdd_trans_create(env, mdd);
1344 RETURN(PTR_ERR(handle));
1346 rc = mdd_declare_xattr_set(env, mdd, mdd_obj, buf, name, fl, handle);
1350 rc = mdd_trans_start(env, mdd, handle);
1354 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
1356 if (strcmp(XATTR_NAME_HSM, name) == 0) {
1357 rc = mdd_hsm_update_locked(env, obj, buf, handle, &cl_flags);
1359 mdd_write_unlock(env, mdd_obj);
1364 rc = mdo_xattr_set(env, mdd_obj, buf, name, fl, handle);
1365 mdd_write_unlock(env, mdd_obj);
1369 cl_type = mdd_xattr_changelog_type(env, mdd, name);
1373 rc = mdd_changelog_data_store(env, mdd, cl_type, cl_flags, mdd_obj,
1378 return mdd_trans_stop(env, mdd, rc, handle);
1381 static int mdd_declare_xattr_del(const struct lu_env *env,
1382 struct mdd_device *mdd,
1383 struct mdd_object *obj,
1385 struct thandle *handle)
1389 rc = mdo_declare_xattr_del(env, obj, name, handle);
1393 if (mdd_xattr_changelog_type(env, mdd, name) < 0)
1394 return 0; /* no changelog to store */
1396 return mdd_declare_changelog_store(env, mdd, NULL, NULL, handle);
1400 * The caller should guarantee to update the object ctime
1401 * after xattr_set if needed.
1403 static int mdd_xattr_del(const struct lu_env *env, struct md_object *obj,
1406 struct mdd_object *mdd_obj = md2mdd_obj(obj);
1407 struct lu_attr *attr = MDD_ENV_VAR(env, cattr);
1408 struct mdd_device *mdd = mdo2mdd(obj);
1409 struct thandle *handle;
1413 rc = mdd_la_get(env, mdd_obj, attr);
1417 rc = mdd_xattr_sanity_check(env, mdd_obj, attr, name);
1421 handle = mdd_trans_create(env, mdd);
1423 RETURN(PTR_ERR(handle));
1425 rc = mdd_declare_xattr_del(env, mdd, mdd_obj, name, handle);
1429 rc = mdd_trans_start(env, mdd, handle);
1433 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
1434 rc = mdo_xattr_del(env, mdd_obj, name, handle);
1435 mdd_write_unlock(env, mdd_obj);
1439 if (mdd_xattr_changelog_type(env, mdd, name) < 0)
1442 rc = mdd_changelog_data_store(env, mdd, CL_XATTR, 0, mdd_obj, handle);
1446 return mdd_trans_stop(env, mdd, rc, handle);
1450 * read lov EA of an object
1451 * return the lov EA in an allocated lu_buf
1453 int mdd_get_lov_ea(const struct lu_env *env, struct mdd_object *obj,
1454 struct lu_buf *lmm_buf)
1456 struct lu_buf *buf = &mdd_env_info(env)->mti_big_buf;
1461 rc = mdo_xattr_get(env, obj, buf, XATTR_NAME_LOV);
1463 if (rc == -ERANGE) {
1464 /* mti_big_buf is allocated but is too small
1465 * we need to increase it */
1466 buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_big_buf,
1468 if (buf->lb_buf == NULL)
1469 GOTO(out, rc = -ENOMEM);
1480 if (memcmp(buf, &LU_BUF_NULL, sizeof(*buf)) == 0) {
1481 /* mti_big_buf was not allocated, so we have to
1482 * allocate it based on the ea size */
1483 buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_big_buf,
1485 if (buf->lb_buf == NULL)
1486 GOTO(out, rc = -ENOMEM);
1490 lu_buf_alloc(lmm_buf, bufsize);
1491 if (lmm_buf->lb_buf == NULL)
1492 GOTO(out, rc = -ENOMEM);
1494 memcpy(lmm_buf->lb_buf, buf->lb_buf, bufsize);
1500 lu_buf_free(lmm_buf);
1504 static int mdd_xattr_hsm_replace(const struct lu_env *env,
1505 struct mdd_object *o, struct lu_buf *buf,
1506 struct thandle *handle)
1508 struct hsm_attrs *attrs;
1514 rc = mdo_xattr_set(env, o, buf, XATTR_NAME_HSM, LU_XATTR_REPLACE,
1519 attrs = buf->lb_buf;
1520 hsm_flags = le32_to_cpu(attrs->hsm_flags);
1521 if (!(hsm_flags & HS_RELEASED) || mdd_is_dead_obj(o))
1524 /* Add a changelog record for release. */
1525 hsm_set_cl_event(&flags, HE_RELEASE);
1526 rc = mdd_changelog_data_store(env, mdo2mdd(&o->mod_obj), CL_HSM,
1532 * check if layout swapping between 2 objects is allowed
1534 * - only normal FIDs or non-system IGIFs
1535 * - same type of objects
1536 * - same owner/group (so quotas are still valid) unless this is from HSM
1539 static int mdd_layout_swap_allowed(const struct lu_env *env,
1540 struct mdd_object *o1,
1541 const struct lu_attr *attr1,
1542 struct mdd_object *o2,
1543 const struct lu_attr *attr2,
1546 const struct lu_fid *fid1, *fid2;
1552 if (!fid_is_norm(fid1) &&
1553 (!fid_is_igif(fid1) || IS_ERR(mdd_links_get(env, o1))))
1556 if (!fid_is_norm(fid2) &&
1557 (!fid_is_igif(fid2) || IS_ERR(mdd_links_get(env, o2))))
1560 if (mdd_object_type(o1) != mdd_object_type(o2)) {
1561 if (S_ISDIR(mdd_object_type(o1)))
1563 if (S_ISREG(mdd_object_type(o1)))
1568 if (flags & SWAP_LAYOUTS_MDS_HSM)
1571 if ((attr1->la_uid != attr2->la_uid) ||
1572 (attr1->la_gid != attr2->la_gid))
1578 /* XXX To set the proper lmm_oi & lmm_layout_gen when swap layouts, we have to
1579 * look into the layout in MDD layer. */
1580 static int mdd_lmm_oi(struct lov_mds_md *lmm, struct ost_id *oi, bool get)
1582 struct lov_comp_md_v1 *comp_v1;
1583 struct lov_mds_md *v1;
1587 if (le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_COMP_V1) {
1588 comp_v1 = (struct lov_comp_md_v1 *)lmm;
1589 ent_count = le16_to_cpu(comp_v1->lcm_entry_count);
1595 off = le32_to_cpu(comp_v1->lcm_entries[0].lcme_offset);
1596 v1 = (struct lov_mds_md *)((char *)comp_v1 + off);
1599 for (i = 0; i < le32_to_cpu(ent_count); i++) {
1600 off = le32_to_cpu(comp_v1->lcm_entries[i].
1602 v1 = (struct lov_mds_md *)((char *)comp_v1 +
1607 } else if (le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_V1 ||
1608 le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_V3) {
1619 static inline int mdd_get_lmm_oi(struct lov_mds_md *lmm, struct ost_id *oi)
1621 return mdd_lmm_oi(lmm, oi, true);
1624 static inline int mdd_set_lmm_oi(struct lov_mds_md *lmm, struct ost_id *oi)
1626 return mdd_lmm_oi(lmm, oi, false);
1629 static int mdd_lmm_gen(struct lov_mds_md *lmm, __u32 *gen, bool get)
1631 struct lov_comp_md_v1 *comp_v1;
1633 if (le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_COMP_V1) {
1634 comp_v1 = (struct lov_comp_md_v1 *)lmm;
1636 *gen = le32_to_cpu(comp_v1->lcm_layout_gen);
1638 comp_v1->lcm_layout_gen = cpu_to_le32(*gen);
1639 } else if (le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_V1 ||
1640 le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_V3) {
1641 __u16 tmp_gen = *gen;
1643 *gen = le16_to_cpu(lmm->lmm_layout_gen);
1645 lmm->lmm_layout_gen = cpu_to_le16(tmp_gen);
1652 static inline int mdd_get_lmm_gen(struct lov_mds_md *lmm, __u32 *gen)
1654 return mdd_lmm_gen(lmm, gen, true);
1657 static inline int mdd_set_lmm_gen(struct lov_mds_md *lmm, __u32 *gen)
1659 return mdd_lmm_gen(lmm, gen, false);
1663 * swap layouts between 2 lustre objects
1665 static int mdd_swap_layouts(const struct lu_env *env, struct md_object *obj1,
1666 struct md_object *obj2, __u64 flags)
1668 struct mdd_thread_info *info = mdd_env_info(env);
1669 struct mdd_object *fst_o = md2mdd_obj(obj1);
1670 struct mdd_object *snd_o = md2mdd_obj(obj2);
1671 struct lu_attr *fst_la = MDD_ENV_VAR(env, cattr);
1672 struct lu_attr *snd_la = MDD_ENV_VAR(env, tattr);
1673 struct mdd_device *mdd = mdo2mdd(obj1);
1674 struct lov_mds_md *fst_lmm, *snd_lmm;
1675 struct lu_buf *fst_buf = &info->mti_buf[0];
1676 struct lu_buf *snd_buf = &info->mti_buf[1];
1677 struct lu_buf *fst_hsm_buf = &info->mti_buf[2];
1678 struct lu_buf *snd_hsm_buf = &info->mti_buf[3];
1679 struct ost_id *saved_oi = NULL;
1680 struct thandle *handle;
1681 __u32 fst_gen, snd_gen, saved_gen;
1687 CLASSERT(ARRAY_SIZE(info->mti_buf) >= 4);
1688 memset(info->mti_buf, 0, sizeof(info->mti_buf));
1690 /* we have to sort the 2 obj, so locking will always
1691 * be in the same order, even in case of 2 concurrent swaps */
1692 rc = lu_fid_cmp(mdo2fid(fst_o), mdo2fid(snd_o));
1693 if (rc == 0) /* same fid ? */
1699 rc = mdd_la_get(env, fst_o, fst_la);
1703 rc = mdd_la_get(env, snd_o, snd_la);
1707 /* check if layout swapping is allowed */
1708 rc = mdd_layout_swap_allowed(env, fst_o, fst_la, snd_o, snd_la, flags);
1712 handle = mdd_trans_create(env, mdd);
1714 RETURN(PTR_ERR(handle));
1716 /* objects are already sorted */
1717 mdd_write_lock(env, fst_o, MOR_TGT_CHILD);
1718 mdd_write_lock(env, snd_o, MOR_TGT_CHILD);
1720 rc = mdd_get_lov_ea(env, fst_o, fst_buf);
1721 if (rc < 0 && rc != -ENODATA)
1724 rc = mdd_get_lov_ea(env, snd_o, snd_buf);
1725 if (rc < 0 && rc != -ENODATA)
1728 /* swapping 2 non existant layouts is a success */
1729 if (fst_buf->lb_buf == NULL && snd_buf->lb_buf == NULL)
1732 /* to help inode migration between MDT, it is better to
1733 * start by the no layout file (if one), so we order the swap */
1734 if (snd_buf->lb_buf == NULL) {
1736 swap(fst_buf, snd_buf);
1739 fst_gen = snd_gen = 0;
1740 /* lmm and generation layout initialization */
1741 if (fst_buf->lb_buf != NULL) {
1742 fst_lmm = fst_buf->lb_buf;
1743 mdd_get_lmm_gen(fst_lmm, &fst_gen);
1744 fst_fl = LU_XATTR_REPLACE;
1748 fst_fl = LU_XATTR_CREATE;
1751 snd_lmm = snd_buf->lb_buf;
1752 mdd_get_lmm_gen(snd_lmm, &snd_gen);
1754 saved_gen = fst_gen;
1755 /* increase the generation layout numbers */
1760 * XXX The layout generation is used to generate component IDs for
1761 * the composite file, we have to do some special tweaks to make
1762 * sure the layout generation is always adequate for that job.
1765 /* Skip invalid generation number for composite layout */
1766 if ((snd_gen & LCME_ID_MASK) == 0)
1768 if ((fst_gen & LCME_ID_MASK) == 0)
1770 /* Make sure the generation is greater than all the component IDs */
1771 if (fst_gen < snd_gen)
1773 else if (fst_gen > snd_gen)
1776 /* set the file specific informations in lmm */
1777 if (fst_lmm != NULL) {
1778 saved_oi = &info->mti_oa.o_oi;
1779 mdd_get_lmm_oi(fst_lmm, saved_oi);
1780 mdd_set_lmm_gen(fst_lmm, &snd_gen);
1781 mdd_set_lmm_oi(fst_lmm, &snd_lmm->lmm_oi);
1782 mdd_set_lmm_oi(snd_lmm, saved_oi);
1784 if ((snd_lmm->lmm_magic & cpu_to_le32(LOV_MAGIC_MASK)) ==
1785 cpu_to_le32(LOV_MAGIC_MAGIC))
1786 snd_lmm->lmm_magic |= cpu_to_le32(LOV_MAGIC_DEFINED);
1788 GOTO(stop, rc = -EPROTO);
1790 mdd_set_lmm_gen(snd_lmm, &fst_gen);
1792 /* Prepare HSM attribute if it's required */
1793 if (flags & SWAP_LAYOUTS_MDS_HSM) {
1794 const int buflen = sizeof(struct hsm_attrs);
1796 lu_buf_alloc(fst_hsm_buf, buflen);
1797 lu_buf_alloc(snd_hsm_buf, buflen);
1798 if (fst_hsm_buf->lb_buf == NULL || snd_hsm_buf->lb_buf == NULL)
1799 GOTO(stop, rc = -ENOMEM);
1801 /* Read HSM attribute */
1802 rc = mdo_xattr_get(env, fst_o, fst_hsm_buf, XATTR_NAME_HSM);
1806 rc = mdo_xattr_get(env, snd_o, snd_hsm_buf, XATTR_NAME_HSM);
1810 rc = mdd_declare_xattr_set(env, mdd, fst_o, snd_hsm_buf,
1811 XATTR_NAME_HSM, LU_XATTR_REPLACE,
1816 rc = mdd_declare_xattr_set(env, mdd, snd_o, fst_hsm_buf,
1817 XATTR_NAME_HSM, LU_XATTR_REPLACE,
1823 /* prepare transaction */
1824 rc = mdd_declare_xattr_set(env, mdd, fst_o, snd_buf, XATTR_NAME_LOV,
1829 if (fst_buf->lb_buf != NULL)
1830 rc = mdd_declare_xattr_set(env, mdd, snd_o, fst_buf,
1831 XATTR_NAME_LOV, LU_XATTR_REPLACE,
1834 rc = mdd_declare_xattr_del(env, mdd, snd_o, XATTR_NAME_LOV,
1839 rc = mdd_trans_start(env, mdd, handle);
1843 if (flags & SWAP_LAYOUTS_MDS_HSM) {
1844 rc = mdd_xattr_hsm_replace(env, fst_o, snd_hsm_buf, handle);
1848 rc = mdd_xattr_hsm_replace(env, snd_o, fst_hsm_buf, handle);
1850 rc2 = mdd_xattr_hsm_replace(env, fst_o, fst_hsm_buf,
1853 CERROR("%s: restore "DFID" HSM error: %d/%d\n",
1854 mdd_obj_dev_name(fst_o),
1855 PFID(mdo2fid(fst_o)), rc, rc2);
1860 rc = mdo_xattr_set(env, fst_o, snd_buf, XATTR_NAME_LOV, fst_fl, handle);
1864 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_MDS_HSM_SWAP_LAYOUTS))) {
1867 if (fst_buf->lb_buf != NULL)
1868 rc = mdo_xattr_set(env, snd_o, fst_buf, XATTR_NAME_LOV,
1869 LU_XATTR_REPLACE, handle);
1871 rc = mdo_xattr_del(env, snd_o, XATTR_NAME_LOV, handle);
1874 GOTO(out_restore, rc);
1876 /* Issue one changelog record per file */
1877 rc = mdd_changelog_data_store(env, mdd, CL_LAYOUT, 0, fst_o, handle);
1881 rc = mdd_changelog_data_store(env, mdd, CL_LAYOUT, 0, snd_o, handle);
1890 /* failure on second file, but first was done, so we have
1891 * to roll back first. */
1892 if (fst_buf->lb_buf != NULL) {
1893 mdd_set_lmm_oi(fst_lmm, saved_oi);
1894 mdd_set_lmm_gen(fst_lmm, &saved_gen);
1895 rc2 = mdo_xattr_set(env, fst_o, fst_buf, XATTR_NAME_LOV,
1896 LU_XATTR_REPLACE, handle);
1898 rc2 = mdo_xattr_del(env, fst_o, XATTR_NAME_LOV, handle);
1904 rc2 = mdd_xattr_hsm_replace(env, fst_o, fst_hsm_buf, handle);
1909 rc2 = mdd_xattr_hsm_replace(env, snd_o, snd_hsm_buf, handle);
1914 CERROR("%s: unable to roll back layout swap. FIDs: "
1915 DFID" and "DFID "error: %d/%d, steps: %d\n",
1916 mdd_obj_dev_name(fst_o),
1917 PFID(mdo2fid(snd_o)), PFID(mdo2fid(fst_o)),
1919 /* a solution to avoid journal commit is to panic,
1920 * but it has strong consequences so we use LBUG to
1921 * allow sysdamin to choose to panic or not
1928 rc = mdd_trans_stop(env, mdd, rc, handle);
1930 mdd_write_unlock(env, snd_o);
1931 mdd_write_unlock(env, fst_o);
1933 lu_buf_free(fst_buf);
1934 lu_buf_free(snd_buf);
1935 lu_buf_free(fst_hsm_buf);
1936 lu_buf_free(snd_hsm_buf);
1939 (void) mdd_object_pfid_replace(env, fst_o);
1940 (void) mdd_object_pfid_replace(env, snd_o);
1945 static int mdd_declare_layout_change(const struct lu_env *env,
1946 struct mdd_device *mdd,
1947 struct mdd_object *obj,
1948 struct md_layout_change *mlc,
1949 struct thandle *handle)
1953 rc = mdo_declare_layout_change(env, obj, mlc, handle);
1957 return mdd_declare_changelog_store(env, mdd, NULL, NULL, handle);
1960 /* For PFL, this is used to instantiate necessary component objects. */
1962 mdd_layout_instantiate_component(const struct lu_env *env,
1963 struct mdd_object *obj, struct md_layout_change *mlc,
1964 struct thandle *handle)
1966 struct mdd_device *mdd = mdd_obj2mdd_dev(obj);
1970 if (mlc->mlc_opc != MD_LAYOUT_WRITE)
1973 rc = mdd_declare_layout_change(env, mdd, obj, mlc, handle);
1975 * It's possible that another layout write intent has already
1976 * instantiated our objects, so a -EALREADY returned, and we need to
1980 RETURN(rc == -EALREADY ? 0 : rc);
1982 rc = mdd_trans_start(env, mdd, handle);
1986 mdd_write_lock(env, obj, MOR_TGT_CHILD);
1987 rc = mdo_layout_change(env, obj, mlc, handle);
1988 mdd_write_unlock(env, obj);
1992 rc = mdd_changelog_data_store(env, mdd, CL_LAYOUT, 0, obj, handle);
1997 * Change the FLR layout from RDONLY to WRITE_PENDING.
1999 * It picks the primary mirror, and bumps the layout version, and set
2000 * layout version xattr to OST objects in a sync tx. In order to facilitate
2001 * the handling of phantom writers from evicted clients, the clients carry
2002 * layout version of the file with write RPC, so that the OSTs can verify
2003 * if the write RPCs are legitimate, meaning not from evicted clients.
2006 mdd_layout_update_rdonly(const struct lu_env *env, struct mdd_object *obj,
2007 struct md_layout_change *mlc, struct thandle *handle)
2009 struct mdd_device *mdd = mdd_obj2mdd_dev(obj);
2013 /* Verify acceptable operations */
2014 switch (mlc->mlc_opc) {
2015 case MD_LAYOUT_WRITE:
2017 case MD_LAYOUT_RESYNC:
2018 /* these are legal operations - this represents the case that
2019 * a few mirrors were missed in the last resync.
2020 * XXX: it will be supported later */
2021 case MD_LAYOUT_RESYNC_DONE:
2026 rc = mdd_declare_layout_change(env, mdd, obj, mlc, handle);
2030 rc = mdd_declare_xattr_del(env, mdd, obj, XATTR_NAME_SOM, handle);
2034 /* record a changelog for data mover to consume */
2035 rc = mdd_declare_changelog_store(env, mdd, NULL, NULL, handle);
2039 rc = mdd_trans_start(env, mdd, handle);
2043 /* it needs a sync tx to make FLR to work properly */
2044 handle->th_sync = 1;
2046 mdd_write_lock(env, obj, MOR_TGT_CHILD);
2047 rc = mdo_layout_change(env, obj, mlc, handle);
2049 rc = mdo_xattr_del(env, obj, XATTR_NAME_SOM, handle);
2053 mdd_write_unlock(env, obj);
2057 rc = mdd_changelog_data_store(env, mdd, CL_FLRW, 0, obj, handle);
2068 * Handle mirrored file state transition when it's in WRITE_PENDING.
2070 * Only MD_LAYOUT_RESYNC, which represents start of resync, is allowed when
2071 * the file is in WRITE_PENDING state. If everything goes fine, the file's
2072 * layout version will be increased, and the file's state will be changed to
2076 mdd_layout_update_write_pending(const struct lu_env *env,
2077 struct mdd_object *obj, struct md_layout_change *mlc,
2078 struct thandle *handle)
2080 struct mdd_device *mdd = mdd_obj2mdd_dev(obj);
2084 switch (mlc->mlc_opc) {
2085 case MD_LAYOUT_RESYNC:
2086 /* Upon receiving the resync request, it should
2087 * instantiate all stale components right away to get ready
2088 * for mirror copy. In order to avoid layout version change,
2089 * client should avoid sending LAYOUT_WRITE request at the
2092 case MD_LAYOUT_WRITE:
2093 /* legal race for concurrent write, the file state has been
2094 * changed by another client. */
2100 rc = mdd_declare_layout_change(env, mdd, obj, mlc, handle);
2104 rc = mdd_trans_start(env, mdd, handle);
2108 /* it needs a sync tx to make FLR to work properly */
2109 handle->th_sync = 1;
2111 mdd_write_lock(env, obj, MOR_TGT_CHILD);
2112 rc = mdo_layout_change(env, obj, mlc, handle);
2113 mdd_write_unlock(env, obj);
2124 * Handle the requests when a FLR file's state is in SYNC_PENDING.
2126 * Only concurrent write and sync complete requests are possible when the
2127 * file is in SYNC_PENDING. For the latter request, it will pass in the
2128 * mirrors that have been synchronized, then the stale bit will be cleared
2129 * to make the file's state turn into RDONLY.
2130 * For concurrent write reqeust, it just needs to change the file's state
2131 * to WRITE_PENDING in a sync tx. It doesn't have to change the layout
2132 * version because the version will be increased in the transition to
2133 * SYNC_PENDING later so that it can deny the write request from potential
2134 * evicted SYNC clients. */
2136 mdd_object_update_sync_pending(const struct lu_env *env, struct mdd_object *obj,
2137 struct md_layout_change *mlc, struct thandle *handle)
2139 struct mdd_device *mdd = mdd_obj2mdd_dev(obj);
2140 struct lu_buf *som_buf = &mdd_env_info(env)->mti_buf[1];
2145 /* operation validation */
2146 switch (mlc->mlc_opc) {
2147 case MD_LAYOUT_RESYNC_DONE:
2148 /* resync complete. */
2149 case MD_LAYOUT_WRITE:
2150 /* concurrent write. */
2152 case MD_LAYOUT_RESYNC:
2153 /* resync again, most likely the previous run failed.
2154 * no-op if it's already in SYNC_PENDING state */
2160 if (mlc->mlc_som.lsa_valid & LSOM_FL_VALID) {
2161 rc = mdo_xattr_get(env, obj, &LU_BUF_NULL, XATTR_NAME_SOM);
2162 if (rc && rc != -ENODATA)
2165 fl = rc == -ENODATA ? LU_XATTR_CREATE : LU_XATTR_REPLACE;
2166 som_buf->lb_buf = &mlc->mlc_som;
2167 som_buf->lb_len = sizeof(mlc->mlc_som);
2170 rc = mdd_declare_layout_change(env, mdd, obj, mlc, handle);
2174 /* record a changelog for the completion of resync */
2175 rc = mdd_declare_changelog_store(env, mdd, NULL, NULL, handle);
2179 /* RESYNC_DONE has piggybacked size and blocks */
2181 rc = mdd_declare_xattr_set(env, mdd, obj, som_buf,
2182 XATTR_NAME_SOM, fl, handle);
2187 rc = mdd_trans_start(env, mdd, handle);
2191 /* it needs a sync tx to make FLR to work properly */
2192 handle->th_sync = 1;
2194 rc = mdo_layout_change(env, obj, mlc, handle);
2199 rc = mdo_xattr_set(env, obj, som_buf, XATTR_NAME_SOM,
2205 rc = mdd_changelog_data_store(env, mdd, CL_RESYNC, 0, obj, handle);
2214 * Layout change callback for object.
2216 * This is only used by FLR for now. In the future, it can be exteneded to
2217 * handle all layout change.
2220 mdd_layout_change(const struct lu_env *env, struct md_object *o,
2221 struct md_layout_change *mlc)
2223 struct mdd_object *obj = md2mdd_obj(o);
2224 struct mdd_device *mdd = mdd_obj2mdd_dev(obj);
2225 struct lu_buf *buf = mdd_buf_get(env, NULL, 0);
2226 struct lov_comp_md_v1 *lcm;
2227 struct thandle *handle;
2232 /* Verify acceptable operations */
2233 switch (mlc->mlc_opc) {
2234 case MD_LAYOUT_WRITE:
2235 case MD_LAYOUT_RESYNC:
2236 case MD_LAYOUT_RESYNC_DONE:
2242 handle = mdd_trans_create(env, mdd);
2244 RETURN(PTR_ERR(handle));
2246 rc = mdd_get_lov_ea(env, obj, buf);
2253 /* analyze the layout to make sure it's a FLR file */
2255 if (le32_to_cpu(lcm->lcm_magic) != LOV_MAGIC_COMP_V1)
2256 GOTO(out, rc = -EINVAL);
2258 flr_state = le16_to_cpu(lcm->lcm_flags) & LCM_FL_FLR_MASK;
2260 /* please refer to HLD of FLR for state transition */
2261 switch (flr_state) {
2262 case LCM_FL_NOT_FLR:
2263 rc = mdd_layout_instantiate_component(env, obj, mlc, handle);
2265 case LCM_FL_WRITE_PENDING:
2266 rc = mdd_layout_update_write_pending(env, obj, mlc, handle);
2269 rc = mdd_layout_update_rdonly(env, obj, mlc, handle);
2271 case LCM_FL_SYNC_PENDING:
2272 rc = mdd_object_update_sync_pending(env, obj, mlc, handle);
2281 mdd_trans_stop(env, mdd, rc, handle);
2286 void mdd_object_make_hint(const struct lu_env *env, struct mdd_object *parent,
2287 struct mdd_object *child, const struct lu_attr *attr,
2288 const struct md_op_spec *spec,
2289 struct dt_allocation_hint *hint)
2291 struct dt_object *np = parent ? mdd_object_child(parent) : NULL;
2292 struct dt_object *nc = mdd_object_child(child);
2294 memset(hint, 0, sizeof(*hint));
2296 /* For striped directory, give striping EA to lod_ah_init, which will
2297 * decide the stripe_offset and stripe count by it. */
2298 if (S_ISDIR(attr->la_mode) &&
2299 unlikely(spec != NULL && spec->sp_cr_flags & MDS_OPEN_HAS_EA)) {
2300 hint->dah_eadata = spec->u.sp_ea.eadata;
2301 hint->dah_eadata_len = spec->u.sp_ea.eadatalen;
2303 hint->dah_eadata = NULL;
2304 hint->dah_eadata_len = 0;
2307 CDEBUG(D_INFO, DFID" eadata %p len %d\n", PFID(mdd_object_fid(child)),
2308 hint->dah_eadata, hint->dah_eadata_len);
2309 /* @hint will be initialized by underlying device. */
2310 nc->do_ops->do_ah_init(env, hint, np, nc, attr->la_mode & S_IFMT);
2314 * do NOT or the MAY_*'s, you'll get the weakest
2316 int accmode(const struct lu_env *env, const struct lu_attr *la, int flags)
2320 /* Sadly, NFSD reopens a file repeatedly during operation, so the
2321 * "acc_mode = 0" allowance for newly-created files isn't honoured.
2322 * NFSD uses the MDS_OPEN_OWNEROVERRIDE flag to say that a file
2323 * owner can write to a file even if it is marked readonly to hide
2324 * its brokenness. (bug 5781) */
2325 if (flags & MDS_OPEN_OWNEROVERRIDE) {
2326 struct lu_ucred *uc = lu_ucred_check(env);
2328 if ((uc == NULL) || (la->la_uid == uc->uc_fsuid))
2332 if (flags & FMODE_READ)
2334 if (flags & (FMODE_WRITE | MDS_OPEN_TRUNC | MDS_OPEN_APPEND))
2336 if (flags & MDS_FMODE_EXEC)
2341 static int mdd_open_sanity_check(const struct lu_env *env,
2342 struct mdd_object *obj,
2343 const struct lu_attr *attr, int flag)
2349 if (mdd_is_dead_obj(obj))
2352 if (S_ISLNK(attr->la_mode))
2355 mode = accmode(env, attr, flag);
2357 if (S_ISDIR(attr->la_mode) && (mode & MAY_WRITE))
2360 if (!(flag & MDS_OPEN_CREATED)) {
2361 rc = mdd_permission_internal(env, obj, attr, mode);
2366 if (S_ISFIFO(attr->la_mode) || S_ISSOCK(attr->la_mode) ||
2367 S_ISBLK(attr->la_mode) || S_ISCHR(attr->la_mode))
2368 flag &= ~MDS_OPEN_TRUNC;
2370 /* For writing append-only file must open it with append mode. */
2371 if (attr->la_flags & LUSTRE_APPEND_FL) {
2372 if ((flag & FMODE_WRITE) && !(flag & MDS_OPEN_APPEND))
2374 if (flag & MDS_OPEN_TRUNC)
2381 static int mdd_open(const struct lu_env *env, struct md_object *obj,
2384 struct mdd_object *mdd_obj = md2mdd_obj(obj);
2385 struct md_device *md_dev = lu2md_dev(mdd2lu_dev(mdo2mdd(obj)));
2386 struct lu_attr *attr = MDD_ENV_VAR(env, cattr);
2389 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
2391 rc = mdd_la_get(env, mdd_obj, attr);
2395 rc = mdd_open_sanity_check(env, mdd_obj, attr, flags);
2399 mdd_obj->mod_count++;
2401 mdd_changelog(env, CL_OPEN, flags, md_dev, mdo2fid(mdd_obj));
2405 mdd_write_unlock(env, mdd_obj);
2409 static int mdd_declare_close(const struct lu_env *env,
2410 struct mdd_object *obj,
2412 struct thandle *handle)
2416 rc = orph_declare_index_delete(env, obj, handle);
2420 return mdo_declare_destroy(env, obj, handle);
2424 * No permission check is needed.
2426 static int mdd_close(const struct lu_env *env, struct md_object *obj,
2427 struct md_attr *ma, int mode)
2429 struct mdd_object *mdd_obj = md2mdd_obj(obj);
2430 struct mdd_device *mdd = mdo2mdd(obj);
2431 struct thandle *handle = NULL;
2434 bool blocked = false;
2437 if (ma->ma_valid & MA_FLAGS && ma->ma_attr_flags & MDS_KEEP_ORPHAN) {
2438 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
2439 mdd_obj->mod_count--;
2440 mdd_write_unlock(env, mdd_obj);
2442 if (mdd_obj->mod_flags & ORPHAN_OBJ && !mdd_obj->mod_count)
2443 CDEBUG(D_HA, "Object "DFID" is retained in orphan "
2444 "list\n", PFID(mdd_object_fid(mdd_obj)));
2448 /* mdd_finish_unlink() will always set orphan object as DEAD_OBJ, but
2449 * it might fail to add the object to orphan list (w/o ORPHAN_OBJ). */
2450 /* check without any lock */
2451 is_orphan = mdd_obj->mod_count == 1 &&
2452 (mdd_obj->mod_flags & (ORPHAN_OBJ | DEAD_OBJ)) != 0;
2456 /* mdd_trans_create() maybe failed because of barrier_entry(),
2457 * under such case, the orphan MDT-object will be left in the
2458 * orphan list, and when the MDT remount next time, the unused
2459 * orphans will be destroyed automatically.
2461 * One exception: the former mdd_finish_unlink may failed to
2462 * add the orphan MDT-object to the orphan list, then if the
2463 * mdd_trans_create() failed because of barrier_entry(), the
2464 * MDT-object will become real orphan that is neither in the
2465 * namespace nor in the orphan list. Such bad case should be
2466 * very rare and will be handled by e2fsck/lfsck. */
2467 handle = mdd_trans_create(env, mdo2mdd(obj));
2468 if (IS_ERR(handle)) {
2469 rc = PTR_ERR(handle);
2470 if (rc != -EINPROGRESS)
2478 rc = mdd_declare_close(env, mdd_obj, ma, handle);
2482 rc = mdd_declare_changelog_store(env, mdd, NULL, NULL, handle);
2486 rc = mdd_trans_start(env, mdo2mdd(obj), handle);
2492 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
2493 rc = mdd_la_get(env, mdd_obj, &ma->ma_attr);
2495 CERROR("Failed to get lu_attr of "DFID": %d\n",
2496 PFID(mdd_object_fid(mdd_obj)), rc);
2500 /* check again with lock */
2501 is_orphan = (mdd_obj->mod_count == 1) &&
2502 ((mdd_obj->mod_flags & (ORPHAN_OBJ | DEAD_OBJ)) != 0 ||
2503 ma->ma_attr.la_nlink == 0);
2505 if (is_orphan && !handle && !blocked) {
2506 mdd_write_unlock(env, mdd_obj);
2510 mdd_obj->mod_count--; /*release open count */
2512 if (!is_orphan || blocked)
2516 /* NB: Object maybe not in orphan list originally, it is rare case for
2517 * mdd_finish_unlink() failure, in that case, the object doesn't have
2518 * ORPHAN_OBJ flag */
2519 if ((mdd_obj->mod_flags & ORPHAN_OBJ) != 0) {
2520 /* remove link to object from orphan index */
2521 LASSERT(handle != NULL);
2522 rc = __mdd_orphan_del(env, mdd_obj, handle);
2524 CERROR("%s: unable to delete "DFID" from orphan list: "
2525 "rc = %d\n", lu_dev_name(mdd2lu_dev(mdd)),
2526 PFID(mdd_object_fid(mdd_obj)), rc);
2527 /* If object was not deleted from orphan list, do not
2528 * destroy OSS objects, which will be done when next
2533 CDEBUG(D_HA, "Object "DFID" is deleted from orphan "
2534 "list, OSS objects to be destroyed.\n",
2535 PFID(mdd_object_fid(mdd_obj)));
2538 rc = mdo_destroy(env, mdd_obj, handle);
2541 CERROR("%s: unable to delete "DFID" from orphan list: "
2542 "rc = %d\n", lu_dev_name(mdd2lu_dev(mdd)),
2543 PFID(mdd_object_fid(mdd_obj)), rc);
2548 mdd_write_unlock(env, mdd_obj);
2550 /* Record CL_CLOSE in changelog only if file was opened in write mode,
2551 * or if CL_OPEN was recorded.
2552 * Changelogs mask may change between open and close operations, but
2553 * this is not a big deal if we have a CL_CLOSE entry with no matching
2554 * CL_OPEN. Plus Changelogs mask may not change often.
2556 if (!rc && !blocked &&
2557 ((mode & (FMODE_WRITE | MDS_OPEN_APPEND | MDS_OPEN_TRUNC)) ||
2558 (mdd->mdd_cl.mc_mask & (1 << CL_OPEN))) &&
2559 !(ma->ma_valid & MA_FLAGS && ma->ma_attr_flags & MDS_RECOV_OPEN)) {
2560 if (handle == NULL) {
2561 handle = mdd_trans_create(env, mdo2mdd(obj));
2563 GOTO(stop, rc = PTR_ERR(handle));
2565 rc = mdd_declare_changelog_store(env, mdd, NULL, NULL,
2570 rc = mdd_trans_start(env, mdo2mdd(obj), handle);
2575 mdd_changelog_data_store(env, mdd, CL_CLOSE, mode,
2580 if (handle != NULL && !IS_ERR(handle))
2581 rc = mdd_trans_stop(env, mdd, rc, handle);
2587 * Permission check is done when open,
2588 * no need check again.
2590 static int mdd_readpage_sanity_check(const struct lu_env *env,
2591 struct mdd_object *obj)
2593 struct dt_object *next = mdd_object_child(obj);
2597 if (S_ISDIR(mdd_object_type(obj)) && dt_try_as_dir(env, next))
2605 static int mdd_dir_page_build(const struct lu_env *env, union lu_page *lp,
2606 size_t nob, const struct dt_it_ops *iops,
2607 struct dt_it *it, __u32 attr, void *arg)
2609 struct lu_dirpage *dp = &lp->lp_dir;
2613 struct lu_dirent *ent;
2614 struct lu_dirent *last = NULL;
2618 if (nob < sizeof(*dp))
2621 memset(area, 0, sizeof (*dp));
2622 area += sizeof (*dp);
2623 nob -= sizeof (*dp);
2630 len = iops->key_size(env, it);
2632 /* IAM iterator can return record with zero len. */
2636 hash = iops->store(env, it);
2637 if (unlikely(first)) {
2639 dp->ldp_hash_start = cpu_to_le64(hash);
2642 /* calculate max space required for lu_dirent */
2643 recsize = lu_dirent_calc_size(len, attr);
2645 if (nob >= recsize) {
2646 result = iops->rec(env, it, (struct dt_rec *)ent, attr);
2647 if (result == -ESTALE)
2652 /* osd might not able to pack all attributes,
2653 * so recheck rec length */
2654 recsize = le16_to_cpu(ent->lde_reclen);
2656 if (le32_to_cpu(ent->lde_attrs) & LUDA_FID) {
2657 fid_le_to_cpu(&fid, &ent->lde_fid);
2658 if (fid_is_dot_lustre(&fid))
2662 result = (last != NULL) ? 0 :-EINVAL;
2666 ent = (void *)ent + recsize;
2670 result = iops->next(env, it);
2671 if (result == -ESTALE)
2673 } while (result == 0);
2676 dp->ldp_hash_end = cpu_to_le64(hash);
2678 if (last->lde_hash == dp->ldp_hash_end)
2679 dp->ldp_flags |= cpu_to_le32(LDF_COLLIDE);
2680 last->lde_reclen = 0; /* end mark */
2683 /* end of directory */
2684 dp->ldp_hash_end = cpu_to_le64(MDS_DIR_END_OFF);
2685 else if (result < 0)
2686 CWARN("build page failed: %d!\n", result);
2690 int mdd_readpage(const struct lu_env *env, struct md_object *obj,
2691 const struct lu_rdpg *rdpg)
2693 struct mdd_object *mdd_obj = md2mdd_obj(obj);
2697 if (mdd_object_exists(mdd_obj) == 0) {
2698 CERROR("%s: object "DFID" not found: rc = -2\n",
2699 mdd_obj_dev_name(mdd_obj),PFID(mdd_object_fid(mdd_obj)));
2703 mdd_read_lock(env, mdd_obj, MOR_TGT_CHILD);
2704 rc = mdd_readpage_sanity_check(env, mdd_obj);
2706 GOTO(out_unlock, rc);
2708 if (mdd_is_dead_obj(mdd_obj)) {
2710 struct lu_dirpage *dp;
2713 * According to POSIX, please do not return any entry to client:
2714 * even dot and dotdot should not be returned.
2716 CDEBUG(D_INODE, "readdir from dead object: "DFID"\n",
2717 PFID(mdd_object_fid(mdd_obj)));
2719 if (rdpg->rp_count <= 0)
2720 GOTO(out_unlock, rc = -EFAULT);
2721 LASSERT(rdpg->rp_pages != NULL);
2723 pg = rdpg->rp_pages[0];
2724 dp = (struct lu_dirpage *)kmap(pg);
2725 memset(dp, 0 , sizeof(struct lu_dirpage));
2726 dp->ldp_hash_start = cpu_to_le64(rdpg->rp_hash);
2727 dp->ldp_hash_end = cpu_to_le64(MDS_DIR_END_OFF);
2728 dp->ldp_flags = cpu_to_le32(LDF_EMPTY);
2730 GOTO(out_unlock, rc = LU_PAGE_SIZE);
2733 rc = dt_index_walk(env, mdd_object_child(mdd_obj), rdpg,
2734 mdd_dir_page_build, NULL);
2736 struct lu_dirpage *dp;
2738 dp = kmap(rdpg->rp_pages[0]);
2739 dp->ldp_hash_start = cpu_to_le64(rdpg->rp_hash);
2742 * No pages were processed, mark this for first page
2745 dp->ldp_hash_end = cpu_to_le64(MDS_DIR_END_OFF);
2746 dp->ldp_flags = cpu_to_le32(LDF_EMPTY);
2747 rc = min_t(unsigned int, LU_PAGE_SIZE, rdpg->rp_count);
2749 kunmap(rdpg->rp_pages[0]);
2752 GOTO(out_unlock, rc);
2754 mdd_read_unlock(env, mdd_obj);
2758 static int mdd_object_sync(const struct lu_env *env, struct md_object *obj)
2760 struct mdd_object *mdd_obj = md2mdd_obj(obj);
2762 if (mdd_object_exists(mdd_obj) == 0) {
2765 CERROR("%s: object "DFID" not found: rc = %d\n",
2766 mdd_obj_dev_name(mdd_obj),
2767 PFID(mdd_object_fid(mdd_obj)), rc);
2770 return dt_object_sync(env, mdd_object_child(mdd_obj),
2774 static int mdd_object_lock(const struct lu_env *env,
2775 struct md_object *obj,
2776 struct lustre_handle *lh,
2777 struct ldlm_enqueue_info *einfo,
2778 union ldlm_policy_data *policy)
2780 struct mdd_object *mdd_obj = md2mdd_obj(obj);
2781 return dt_object_lock(env, mdd_object_child(mdd_obj), lh,
2785 static int mdd_object_unlock(const struct lu_env *env,
2786 struct md_object *obj,
2787 struct ldlm_enqueue_info *einfo,
2788 union ldlm_policy_data *policy)
2790 struct mdd_object *mdd_obj = md2mdd_obj(obj);
2791 return dt_object_unlock(env, mdd_object_child(mdd_obj), einfo, policy);
2794 const struct md_object_operations mdd_obj_ops = {
2795 .moo_permission = mdd_permission,
2796 .moo_attr_get = mdd_attr_get,
2797 .moo_attr_set = mdd_attr_set,
2798 .moo_xattr_get = mdd_xattr_get,
2799 .moo_xattr_set = mdd_xattr_set,
2800 .moo_xattr_list = mdd_xattr_list,
2801 .moo_invalidate = mdd_invalidate,
2802 .moo_xattr_del = mdd_xattr_del,
2803 .moo_swap_layouts = mdd_swap_layouts,
2804 .moo_open = mdd_open,
2805 .moo_close = mdd_close,
2806 .moo_readpage = mdd_readpage,
2807 .moo_readlink = mdd_readlink,
2808 .moo_changelog = mdd_changelog,
2809 .moo_object_sync = mdd_object_sync,
2810 .moo_object_lock = mdd_object_lock,
2811 .moo_object_unlock = mdd_object_unlock,
2812 .moo_layout_change = mdd_layout_change,