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_dir.c
34 * Lustre Metadata Server (mdd) routines
36 * Author: Wang Di <wangdi@intel.com>
39 #define DEBUG_SUBSYSTEM S_MDS
41 #include <obd_class.h>
42 #include <obd_support.h>
43 #include <lustre_mds.h>
44 #include <lustre_fid.h>
45 #include <lustre_lmv.h>
46 #include <lustre_idmap.h>
48 #include "mdd_internal.h"
50 static const char dot[] = ".";
51 static const char dotdot[] = "..";
53 static struct lu_name lname_dotdot = {
54 .ln_name = (char *) dotdot,
55 .ln_namelen = sizeof(dotdot) - 1,
59 mdd_name_check(struct mdd_device *m, const struct lu_name *ln)
61 if (!lu_name_is_valid(ln))
63 else if (ln->ln_namelen > m->mdd_dt_conf.ddp_max_name_len)
69 /* Get FID from name and parent */
71 __mdd_lookup(const struct lu_env *env, struct md_object *pobj,
72 const struct lu_attr *pattr, const struct lu_name *lname,
73 struct lu_fid* fid, int mask)
75 const char *name = lname->ln_name;
76 const struct dt_key *key = (const struct dt_key *)name;
77 struct mdd_object *mdd_obj = md2mdd_obj(pobj);
78 struct mdd_device *m = mdo2mdd(pobj);
79 struct dt_object *dir = mdd_object_child(mdd_obj);
83 if (unlikely(mdd_is_dead_obj(mdd_obj)))
86 if (!mdd_object_exists(mdd_obj))
89 if (mdd_object_remote(mdd_obj)) {
90 CDEBUG(D_INFO, "%s: Object "DFID" locates on remote server\n",
91 mdd2obd_dev(m)->obd_name, PFID(mdo2fid(mdd_obj)));
94 rc = mdd_permission_internal_locked(env, mdd_obj, pattr, mask,
99 if (likely(S_ISDIR(mdd_object_type(mdd_obj)) &&
100 dt_try_as_dir(env, dir)))
101 rc = dt_lookup(env, dir, (struct dt_rec *)fid, key);
108 int mdd_lookup(const struct lu_env *env,
109 struct md_object *pobj, const struct lu_name *lname,
110 struct lu_fid *fid, struct md_op_spec *spec)
112 struct lu_attr *pattr = MDD_ENV_VAR(env, pattr);
116 rc = mdd_la_get(env, md2mdd_obj(pobj), pattr);
120 rc = __mdd_lookup(env, pobj, pattr, lname, fid,
121 (spec != NULL && spec->sp_permitted) ? 0 : MAY_EXEC);
125 /** Read the link EA into a temp buffer.
126 * Uses the mdd_thread_info::mti_big_buf since it is generally large.
127 * A pointer to the buffer is stored in \a ldata::ld_buf.
131 static int __mdd_links_read(const struct lu_env *env,
132 struct mdd_object *mdd_obj,
133 struct linkea_data *ldata)
137 if (!mdd_object_exists(mdd_obj))
140 /* First try a small buf */
141 LASSERT(env != NULL);
142 ldata->ld_buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_link_buf,
144 if (ldata->ld_buf->lb_buf == NULL)
147 rc = mdo_xattr_get(env, mdd_obj, ldata->ld_buf, XATTR_NAME_LINK);
149 /* Buf was too small, figure out what we need. */
150 lu_buf_free(ldata->ld_buf);
151 rc = mdo_xattr_get(env, mdd_obj, ldata->ld_buf,
155 ldata->ld_buf = lu_buf_check_and_alloc(ldata->ld_buf, rc);
156 if (ldata->ld_buf->lb_buf == NULL)
158 rc = mdo_xattr_get(env, mdd_obj, ldata->ld_buf,
162 lu_buf_free(ldata->ld_buf);
163 ldata->ld_buf = NULL;
167 return linkea_init(ldata);
170 static int mdd_links_read(const struct lu_env *env,
171 struct mdd_object *mdd_obj,
172 struct linkea_data *ldata)
176 rc = __mdd_links_read(env, mdd_obj, ldata);
178 rc = linkea_init(ldata);
183 static int mdd_links_read_with_rec(const struct lu_env *env,
184 struct mdd_object *mdd_obj,
185 struct linkea_data *ldata)
189 rc = __mdd_links_read(env, mdd_obj, ldata);
191 rc = linkea_init_with_rec(ldata);
197 * Get parent FID of the directory
199 * Read parent FID from linkEA, if that fails, then do lookup
200 * dotdot to get the parent FID.
202 * \param[in] env execution environment
203 * \param[in] obj object from which to find the parent FID
204 * \param[in] attr attribute of the object
205 * \param[out] fid fid to get the parent FID
207 * \retval 0 if getting the parent FID succeeds.
208 * \retval negative errno if getting the parent FID fails.
210 static inline int mdd_parent_fid(const struct lu_env *env,
211 struct mdd_object *obj,
212 const struct lu_attr *attr,
215 struct mdd_thread_info *info = mdd_env_info(env);
216 struct linkea_data ldata = { NULL };
217 struct lu_buf *buf = &info->mti_link_buf;
218 struct lu_name lname;
223 LASSERTF(S_ISDIR(mdd_object_type(obj)),
224 "%s: FID "DFID" is not a directory type = %o\n",
225 mdd_obj_dev_name(obj), PFID(mdd_object_fid(obj)),
226 mdd_object_type(obj));
228 buf = lu_buf_check_and_alloc(buf, PATH_MAX);
229 if (buf->lb_buf == NULL)
230 GOTO(lookup, rc = 0);
233 rc = mdd_links_read_with_rec(env, obj, &ldata);
237 /* the obj is not locked, don't cache attributes */
238 mdd_invalidate(env, &obj->mod_obj);
240 LASSERT(ldata.ld_leh != NULL);
241 /* Directory should only have 1 parent */
242 if (ldata.ld_leh->leh_reccount > 1)
245 ldata.ld_lee = (struct link_ea_entry *)(ldata.ld_leh + 1);
247 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, &lname, fid);
248 if (likely(fid_is_sane(fid)))
251 rc = __mdd_lookup(env, &obj->mod_obj, attr, &lname_dotdot, fid, 0);
256 * For root fid use special function, which does not compare version component
257 * of fid. Version component is different for root fids on all MDTs.
259 int mdd_is_root(struct mdd_device *mdd, const struct lu_fid *fid)
261 return fid_seq(&mdd->mdd_root_fid) == fid_seq(fid) &&
262 fid_oid(&mdd->mdd_root_fid) == fid_oid(fid);
266 * return 1: if \a tfid is the fid of the ancestor of \a mo;
268 * otherwise: values < 0, errors.
270 static int mdd_is_parent(const struct lu_env *env,
271 struct mdd_device *mdd,
272 struct mdd_object *mo,
273 const struct lu_attr *attr,
274 const struct lu_fid *tfid)
276 struct mdd_object *mp;
280 LASSERT(!lu_fid_eq(mdo2fid(mo), tfid));
281 pfid = &mdd_env_info(env)->mti_fid;
283 if (mdd_is_root(mdd, mdo2fid(mo)))
286 if (mdd_is_root(mdd, tfid))
289 rc = mdd_parent_fid(env, mo, attr, pfid);
294 if (lu_fid_eq(pfid, tfid))
297 if (mdd_is_root(mdd, pfid))
300 mp = mdd_object_find(env, mdd, pfid);
304 if (!mdd_object_exists(mp)) {
305 mdd_object_put(env, mp);
309 rc = mdd_parent_fid(env, mp, attr, pfid);
310 mdd_object_put(env, mp);
319 * No permission check is needed.
321 * returns 1: if fid is ancestor of @mo;
322 * returns 0: if fid is not an ancestor of @mo;
323 * returns < 0: if error
325 int mdd_is_subdir(const struct lu_env *env, struct md_object *mo,
326 const struct lu_fid *fid)
328 struct mdd_device *mdd = mdo2mdd(mo);
329 struct lu_attr *attr = MDD_ENV_VAR(env, cattr);
333 if (!mdd_object_exists(md2mdd_obj(mo)))
336 if (!S_ISDIR(mdd_object_type(md2mdd_obj(mo))))
339 rc = mdd_la_get(env, md2mdd_obj(mo), attr);
343 rc = mdd_is_parent(env, mdd, md2mdd_obj(mo), attr, fid);
348 * Check that @dir contains no entries except (possibly) dot and dotdot.
353 * -ENOTDIR not a directory object
354 * -ENOTEMPTY not empty
358 static int mdd_dir_is_empty(const struct lu_env *env,
359 struct mdd_object *dir)
362 struct dt_object *obj;
363 const struct dt_it_ops *iops;
367 obj = mdd_object_child(dir);
368 if (!dt_try_as_dir(env, obj))
371 iops = &obj->do_index_ops->dio_it;
372 it = iops->init(env, obj, LUDA_64BITHASH);
374 result = iops->get(env, it, (const struct dt_key *)"");
377 for (result = 0, i = 0; result == 0 && i < 3; ++i)
378 result = iops->next(env, it);
381 else if (result == 1)
383 } else if (result == 0)
385 * Huh? Index contains no zero key?
392 result = PTR_ERR(it);
393 /* -ENODEV means no valid stripe */
394 if (result == -ENODEV)
401 * Determine if the target object can be hard linked, and right now it only
402 * checks if the link count reach the maximum limit. Note: for ldiskfs, the
403 * directory nlink count might exceed the maximum link count(see
404 * osd_object_ref_add), so it only check nlink for non-directories.
406 * \param[in] env thread environment
407 * \param[in] obj object being linked to
408 * \param[in] la attributes of \a obj
410 * \retval 0 if \a obj can be hard linked
411 * \retval negative error if \a obj is a directory or has too
414 static int __mdd_may_link(const struct lu_env *env, struct mdd_object *obj,
415 const struct lu_attr *la)
417 struct mdd_device *m = mdd_obj2mdd_dev(obj);
422 /* Subdir count limitation can be broken through
423 * (see osd_object_ref_add), so only check non-directory here. */
424 if (!S_ISDIR(la->la_mode) &&
425 la->la_nlink >= m->mdd_dt_conf.ddp_max_nlink)
432 * Check whether it may create the cobj under the pobj.
434 * \param[in] env execution environment
435 * \param[in] pobj the parent directory
436 * \param[in] pattr the attribute of the parent directory
437 * \param[in] cobj the child to be created
438 * \param[in] check_perm if check WRITE|EXEC permission for parent
440 * \retval = 0 create the child under this dir is allowed
441 * \retval negative errno create the child under this dir is
444 int mdd_may_create(const struct lu_env *env, struct mdd_object *pobj,
445 const struct lu_attr *pattr, struct mdd_object *cobj,
451 if (cobj && mdd_object_exists(cobj))
454 if (mdd_is_dead_obj(pobj))
458 rc = mdd_permission_internal_locked(env, pobj, pattr,
459 MAY_WRITE | MAY_EXEC,
465 * Check whether can unlink from the pobj in the case of "cobj == NULL".
467 int mdd_may_unlink(const struct lu_env *env, struct mdd_object *pobj,
468 const struct lu_attr *pattr, const struct lu_attr *attr)
473 if (mdd_is_dead_obj(pobj))
476 if (attr->la_flags & (LUSTRE_APPEND_FL | LUSTRE_IMMUTABLE_FL))
479 rc = mdd_permission_internal_locked(env, pobj, pattr,
480 MAY_WRITE | MAY_EXEC,
485 if (pattr->la_flags & LUSTRE_APPEND_FL)
492 * pobj == NULL is remote ops case, under such case, pobj's
493 * VTX feature has been checked already, no need check again.
495 static inline int mdd_is_sticky(const struct lu_env *env,
496 struct mdd_object *pobj,
497 const struct lu_attr *pattr,
498 struct mdd_object *cobj,
499 const struct lu_attr *cattr)
501 struct lu_ucred *uc = lu_ucred_assert(env);
504 LASSERT(pattr != NULL);
505 if (!(pattr->la_mode & S_ISVTX) ||
506 (pattr->la_uid == uc->uc_fsuid))
510 LASSERT(cattr != NULL);
511 if (cattr->la_uid == uc->uc_fsuid)
514 return !md_capable(uc, CFS_CAP_FOWNER);
517 static int mdd_may_delete_entry(const struct lu_env *env,
518 struct mdd_object *pobj,
519 const struct lu_attr *pattr,
524 LASSERT(pobj != NULL);
525 if (!mdd_object_exists(pobj))
528 if (mdd_is_dead_obj(pobj))
533 rc = mdd_permission_internal_locked(env, pobj, pattr,
534 MAY_WRITE | MAY_EXEC,
540 if (pattr->la_flags & LUSTRE_APPEND_FL)
547 * Check whether it may delete the cobj from the pobj.
550 int mdd_may_delete(const struct lu_env *env, struct mdd_object *tpobj,
551 const struct lu_attr *tpattr, struct mdd_object *tobj,
552 const struct lu_attr *tattr, const struct lu_attr *cattr,
553 int check_perm, int check_empty)
559 LASSERT(tpattr != NULL);
560 rc = mdd_may_delete_entry(env, tpobj, tpattr, check_perm);
568 if (!mdd_object_exists(tobj))
571 if (mdd_is_dead_obj(tobj))
574 if (mdd_is_sticky(env, tpobj, tpattr, tobj, tattr))
577 if (tattr->la_flags & (LUSTRE_APPEND_FL | LUSTRE_IMMUTABLE_FL))
580 /* additional check the rename case */
582 if (S_ISDIR(cattr->la_mode)) {
583 struct mdd_device *mdd = mdo2mdd(&tobj->mod_obj);
585 if (!S_ISDIR(tattr->la_mode))
588 if (lu_fid_eq(mdo2fid(tobj), &mdd->mdd_root_fid))
590 } else if (S_ISDIR(tattr->la_mode))
594 if (S_ISDIR(tattr->la_mode) && check_empty)
595 rc = mdd_dir_is_empty(env, tobj);
601 * Check whether it can create the link file(linked to @src_obj) under
602 * the target directory(@tgt_obj), and src_obj has been locked by
605 * \param[in] env execution environment
606 * \param[in] tgt_obj the target directory
607 * \param[in] tattr attributes of target directory
608 * \param[in] lname the link name
609 * \param[in] src_obj source object for link
610 * \param[in] cattr attributes for source object
612 * \retval = 0 it is allowed to create the link file under tgt_obj
613 * \retval negative error not allowed to create the link file
615 static int mdd_link_sanity_check(const struct lu_env *env,
616 struct mdd_object *tgt_obj,
617 const struct lu_attr *tattr,
618 const struct lu_name *lname,
619 struct mdd_object *src_obj,
620 const struct lu_attr *cattr)
622 struct mdd_device *m = mdd_obj2mdd_dev(src_obj);
626 if (!mdd_object_exists(src_obj))
629 if (mdd_is_dead_obj(src_obj))
632 /* Local ops, no lookup before link, check filename length here. */
633 rc = mdd_name_check(m, lname);
637 if (cattr->la_flags & (LUSTRE_IMMUTABLE_FL | LUSTRE_APPEND_FL))
640 if (S_ISDIR(mdd_object_type(src_obj)))
643 LASSERT(src_obj != tgt_obj);
644 rc = mdd_may_create(env, tgt_obj, tattr, NULL, true);
648 rc = __mdd_may_link(env, src_obj, cattr);
653 static int __mdd_index_delete_only(const struct lu_env *env, struct mdd_object *pobj,
654 const char *name, struct thandle *handle)
656 struct dt_object *next = mdd_object_child(pobj);
660 if (dt_try_as_dir(env, next))
661 rc = dt_delete(env, next, (struct dt_key *)name, handle);
668 static int __mdd_index_insert_only(const struct lu_env *env,
669 struct mdd_object *pobj,
670 const struct lu_fid *lf, __u32 type,
672 struct thandle *handle)
674 struct dt_object *next = mdd_object_child(pobj);
678 if (dt_try_as_dir(env, next)) {
679 struct dt_insert_rec *rec = &mdd_env_info(env)->mti_dt_rec;
682 rec->rec_type = type;
683 rc = dt_insert(env, next, (const struct dt_rec *)rec,
684 (const struct dt_key *)name, handle);
691 /* insert named index, add reference if isdir */
692 static int __mdd_index_insert(const struct lu_env *env, struct mdd_object *pobj,
693 const struct lu_fid *lf, __u32 type,
694 const char *name, struct thandle *handle)
699 rc = __mdd_index_insert_only(env, pobj, lf, type, name, handle);
700 if (rc == 0 && S_ISDIR(type)) {
701 mdd_write_lock(env, pobj, DT_TGT_PARENT);
702 mdo_ref_add(env, pobj, handle);
703 mdd_write_unlock(env, pobj);
709 /* delete named index, drop reference if isdir */
710 static int __mdd_index_delete(const struct lu_env *env, struct mdd_object *pobj,
711 const char *name, int is_dir,
712 struct thandle *handle)
717 rc = __mdd_index_delete_only(env, pobj, name, handle);
718 if (rc == 0 && is_dir) {
719 mdd_write_lock(env, pobj, DT_TGT_PARENT);
720 mdo_ref_del(env, pobj, handle);
721 mdd_write_unlock(env, pobj);
727 static int mdd_llog_record_calc_size(const struct lu_env *env,
728 const struct lu_name *tname,
729 const struct lu_name *sname)
731 const struct lu_ucred *uc = lu_ucred(env);
732 enum changelog_rec_flags clf_flags = CLF_EXTRA_FLAGS;
733 enum changelog_rec_extra_flags crfe = CLFE_UIDGID | CLFE_NID;
736 clf_flags |= CLF_RENAME;
738 if (uc != NULL && uc->uc_jobid[0] != '\0')
739 clf_flags |= CLF_JOBID;
741 return llog_data_len(LLOG_CHANGELOG_HDR_SZ +
742 changelog_rec_offset(clf_flags, crfe) +
743 (tname != NULL ? tname->ln_namelen : 0) +
744 (sname != NULL ? 1 + sname->ln_namelen : 0));
747 int mdd_declare_changelog_store(const struct lu_env *env,
748 struct mdd_device *mdd,
749 enum changelog_rec_type type,
750 const struct lu_name *tname,
751 const struct lu_name *sname,
752 struct thandle *handle)
754 struct obd_device *obd = mdd2obd_dev(mdd);
755 struct llog_ctxt *ctxt;
756 struct llog_changelog_rec *rec;
758 struct thandle *llog_th;
762 if (!mdd_changelog_enabled(env, mdd, type))
765 reclen = mdd_llog_record_calc_size(env, tname, sname);
766 buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_big_buf, reclen);
767 if (buf->lb_buf == NULL)
771 rec->cr_hdr.lrh_len = reclen;
772 rec->cr_hdr.lrh_type = CHANGELOG_REC;
774 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
778 llog_th = thandle_get_sub(env, handle, ctxt->loc_handle->lgh_obj);
780 GOTO(out_put, rc = PTR_ERR(llog_th));
782 rc = llog_declare_add(env, ctxt->loc_handle, &rec->cr_hdr, llog_th);
790 int mdd_changelog_write_rec(const struct lu_env *env,
791 struct llog_handle *loghandle,
792 struct llog_rec_hdr *r,
793 struct llog_cookie *cookie,
794 int idx, struct thandle *th)
798 if (r->lrh_type == CHANGELOG_REC) {
799 struct mdd_device *mdd;
800 struct llog_changelog_rec *rec;
802 mdd = lu2mdd_dev(loghandle->lgh_ctxt->loc_obd->obd_lu_dev);
803 rec = container_of0(r, struct llog_changelog_rec, cr_hdr);
805 spin_lock(&mdd->mdd_cl.mc_lock);
806 rec->cr.cr_index = mdd->mdd_cl.mc_index + 1;
807 spin_unlock(&mdd->mdd_cl.mc_lock);
809 rc = llog_osd_ops.lop_write_rec(env, loghandle, r,
813 * if current llog is full, we will generate a new
814 * llog, and since it's actually not an error, let's
815 * avoid increasing index so that userspace apps
816 * should not see a gap in the changelog sequence
818 if (!(rc == -ENOSPC && llog_is_full(loghandle))) {
819 spin_lock(&mdd->mdd_cl.mc_lock);
820 ++mdd->mdd_cl.mc_index;
821 spin_unlock(&mdd->mdd_cl.mc_lock);
824 rc = llog_osd_ops.lop_write_rec(env, loghandle, r,
831 /** Add a changelog entry \a rec to the changelog llog
834 * \param handle - currently ignored since llogs start their own transaction;
835 * this will hopefully be fixed in llog rewrite
838 int mdd_changelog_store(const struct lu_env *env, struct mdd_device *mdd,
839 struct llog_changelog_rec *rec, struct thandle *th)
841 struct obd_device *obd = mdd2obd_dev(mdd);
842 struct llog_ctxt *ctxt;
843 struct thandle *llog_th;
846 rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) +
847 changelog_rec_varsize(&rec->cr));
849 /* llog_lvfs_write_rec sets the llog tail len */
850 rec->cr_hdr.lrh_type = CHANGELOG_REC;
851 rec->cr.cr_time = cl_time();
853 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
857 llog_th = thandle_get_sub(env, th, ctxt->loc_handle->lgh_obj);
859 GOTO(out_put, rc = PTR_ERR(llog_th));
861 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_CHANGELOG_REORDER, cfs_fail_val);
862 /* nested journal transaction */
863 rc = llog_add(env, ctxt->loc_handle, &rec->cr_hdr, NULL, llog_th);
865 /* time to recover some space ?? */
866 if (likely(!mdd->mdd_changelog_gc ||
867 mdd->mdd_cl.mc_gc_task != MDD_CHLG_GC_NONE ||
868 mdd->mdd_changelog_min_gc_interval >=
869 ktime_get_real_seconds() - mdd->mdd_cl.mc_gc_time))
870 /* save a spin_lock trip */
872 spin_lock(&mdd->mdd_cl.mc_lock);
873 if (likely(mdd->mdd_changelog_gc &&
874 mdd->mdd_cl.mc_gc_task == MDD_CHLG_GC_NONE &&
875 ktime_get_real_seconds() - mdd->mdd_cl.mc_gc_time >
876 mdd->mdd_changelog_min_gc_interval)) {
877 if (unlikely(llog_cat_free_space(ctxt->loc_handle) <=
878 mdd->mdd_changelog_min_free_cat_entries ||
879 OBD_FAIL_CHECK(OBD_FAIL_FORCE_GC_THREAD))) {
880 CWARN("%s:%s low on changelog_catalog free entries, "
881 "starting ChangeLog garbage collection thread\n",
883 OBD_FAIL_CHECK(OBD_FAIL_FORCE_GC_THREAD) ?
886 /* indicate further kthread run will occur outside
887 * right after current journal transaction filling has
890 mdd->mdd_cl.mc_gc_task = MDD_CHLG_GC_NEED;
892 /* next check in mdd_changelog_min_gc_interval anyway
894 mdd->mdd_cl.mc_gc_time = ktime_get_real_seconds();
896 spin_unlock(&mdd->mdd_cl.mc_lock);
904 static void mdd_changelog_rec_ext_rename(struct changelog_rec *rec,
905 const struct lu_fid *sfid,
906 const struct lu_fid *spfid,
907 const struct lu_name *sname)
909 struct changelog_ext_rename *rnm = changelog_rec_rename(rec);
912 LASSERT(sfid != NULL);
913 LASSERT(spfid != NULL);
914 LASSERT(sname != NULL);
916 extsize = sname->ln_namelen + 1;
918 rnm->cr_sfid = *sfid;
919 rnm->cr_spfid = *spfid;
921 changelog_rec_name(rec)[rec->cr_namelen] = '\0';
922 strlcpy(changelog_rec_sname(rec), sname->ln_name, extsize);
923 rec->cr_namelen += extsize;
926 void mdd_changelog_rec_ext_jobid(struct changelog_rec *rec, const char *jobid)
928 struct changelog_ext_jobid *jid = changelog_rec_jobid(rec);
930 if (jobid == NULL || jobid[0] == '\0')
933 strlcpy(jid->cr_jobid, jobid, sizeof(jid->cr_jobid));
936 void mdd_changelog_rec_ext_extra_flags(struct changelog_rec *rec, __u64 eflags)
938 struct changelog_ext_extra_flags *ef = changelog_rec_extra_flags(rec);
940 ef->cr_extra_flags = eflags;
943 void mdd_changelog_rec_extra_uidgid(struct changelog_rec *rec,
944 __u64 uid, __u64 gid)
946 struct changelog_ext_uidgid *uidgid = changelog_rec_uidgid(rec);
948 uidgid->cr_uid = uid;
949 uidgid->cr_gid = gid;
952 void mdd_changelog_rec_extra_nid(struct changelog_rec *rec,
955 struct changelog_ext_nid *clnid = changelog_rec_nid(rec);
960 void mdd_changelog_rec_extra_omode(struct changelog_rec *rec, u32 flags)
962 struct changelog_ext_openmode *omd = changelog_rec_openmode(rec);
964 omd->cr_openflags = flags;
967 void mdd_changelog_rec_extra_xattr(struct changelog_rec *rec,
968 const char *xattr_name)
970 struct changelog_ext_xattr *xattr = changelog_rec_xattr(rec);
972 strlcpy(xattr->cr_xattr, xattr_name, sizeof(xattr->cr_xattr));
975 /** Store a namespace change changelog record
976 * If this fails, we must fail the whole transaction; we don't
977 * want the change to commit without the log entry.
978 * \param target - mdd_object of change
979 * \param tpfid - target parent dir/object fid
980 * \param sfid - source object fid
981 * \param spfid - source parent fid
982 * \param tname - target name string
983 * \param sname - source name string
984 * \param handle - transaction handle
986 int mdd_changelog_ns_store(const struct lu_env *env,
987 struct mdd_device *mdd,
988 enum changelog_rec_type type,
989 enum changelog_rec_flags clf_flags,
990 struct mdd_object *target,
991 const struct lu_fid *tpfid,
992 const struct lu_fid *sfid,
993 const struct lu_fid *spfid,
994 const struct lu_name *tname,
995 const struct lu_name *sname,
996 struct thandle *handle)
998 const struct lu_ucred *uc = lu_ucred(env);
999 struct llog_changelog_rec *rec;
1002 __u64 xflags = CLFE_INVALID;
1006 if (!mdd_changelog_enabled(env, mdd, type))
1009 LASSERT(tpfid != NULL);
1010 LASSERT(tname != NULL);
1011 LASSERT(handle != NULL);
1013 reclen = mdd_llog_record_calc_size(env, tname, sname);
1014 buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_big_buf, reclen);
1015 if (buf->lb_buf == NULL)
1019 clf_flags &= CLF_FLAGMASK;
1020 clf_flags |= CLF_EXTRA_FLAGS;
1023 if (uc->uc_jobid[0] != '\0')
1024 clf_flags |= CLF_JOBID;
1025 xflags |= CLFE_UIDGID;
1030 clf_flags |= CLF_RENAME;
1032 clf_flags |= CLF_VERSION;
1034 rec->cr.cr_flags = clf_flags;
1036 if (clf_flags & CLF_EXTRA_FLAGS) {
1037 mdd_changelog_rec_ext_extra_flags(&rec->cr, xflags);
1038 if (xflags & CLFE_UIDGID)
1039 mdd_changelog_rec_extra_uidgid(&rec->cr,
1040 uc->uc_uid, uc->uc_gid);
1041 if (xflags & CLFE_NID)
1042 mdd_changelog_rec_extra_nid(&rec->cr, uc->uc_nid);
1045 rec->cr.cr_type = (__u32)type;
1046 rec->cr.cr_pfid = *tpfid;
1047 rec->cr.cr_namelen = tname->ln_namelen;
1048 memcpy(changelog_rec_name(&rec->cr), tname->ln_name, tname->ln_namelen);
1050 if (clf_flags & CLF_RENAME)
1051 mdd_changelog_rec_ext_rename(&rec->cr, sfid, spfid, sname);
1053 if (clf_flags & CLF_JOBID)
1054 mdd_changelog_rec_ext_jobid(&rec->cr, uc->uc_jobid);
1056 if (likely(target != NULL)) {
1057 rec->cr.cr_tfid = *mdo2fid(target);
1058 target->mod_cltime = ktime_get();
1060 fid_zero(&rec->cr.cr_tfid);
1063 rc = mdd_changelog_store(env, mdd, rec, handle);
1065 CERROR("%s: cannot store changelog record: type = %d, "
1066 "name = '%s', t = "DFID", p = "DFID": rc = %d\n",
1067 mdd2obd_dev(mdd)->obd_name, type, tname->ln_name,
1068 PFID(&rec->cr.cr_tfid), PFID(&rec->cr.cr_pfid), rc);
1075 static int __mdd_links_add(const struct lu_env *env,
1076 struct mdd_object *mdd_obj,
1077 struct linkea_data *ldata,
1078 const struct lu_name *lname,
1079 const struct lu_fid *pfid,
1080 int first, int check)
1084 if (ldata->ld_leh == NULL) {
1085 rc = first ? -ENODATA : mdd_links_read(env, mdd_obj, ldata);
1089 rc = linkea_data_new(ldata,
1090 &mdd_env_info(env)->mti_link_buf);
1097 rc = linkea_links_find(ldata, lname, pfid);
1098 if (rc && rc != -ENOENT)
1104 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LINKEA_MORE)) {
1105 struct lu_fid *tfid = &mdd_env_info(env)->mti_fid2;
1109 linkea_add_buf(ldata, lname, tfid);
1112 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LINKEA_MORE2))
1113 linkea_add_buf(ldata, lname, pfid);
1115 return linkea_add_buf(ldata, lname, pfid);
1118 static int __mdd_links_del(const struct lu_env *env,
1119 struct mdd_object *mdd_obj,
1120 struct linkea_data *ldata,
1121 const struct lu_name *lname,
1122 const struct lu_fid *pfid)
1126 if (ldata->ld_leh == NULL) {
1127 rc = mdd_links_read(env, mdd_obj, ldata);
1132 rc = linkea_links_find(ldata, lname, pfid);
1136 linkea_del_buf(ldata, lname);
1140 static int mdd_linkea_prepare(const struct lu_env *env,
1141 struct mdd_object *mdd_obj,
1142 const struct lu_fid *oldpfid,
1143 const struct lu_name *oldlname,
1144 const struct lu_fid *newpfid,
1145 const struct lu_name *newlname,
1146 int first, int check,
1147 struct linkea_data *ldata)
1152 if (OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF))
1155 LASSERT(oldpfid != NULL || newpfid != NULL);
1157 if (mdd_obj->mod_flags & DEAD_OBJ)
1158 /* Unnecessary to update linkEA for dead object. */
1161 if (oldpfid != NULL) {
1162 rc = __mdd_links_del(env, mdd_obj, ldata, oldlname, oldpfid);
1164 if ((check == 1) || (rc != -ENODATA && rc != -ENOENT))
1167 /* No changes done. */
1172 /* If renaming, add the new record */
1173 if (newpfid != NULL)
1174 rc = __mdd_links_add(env, mdd_obj, ldata, newlname, newpfid,
1180 int mdd_links_rename(const struct lu_env *env,
1181 struct mdd_object *mdd_obj,
1182 const struct lu_fid *oldpfid,
1183 const struct lu_name *oldlname,
1184 const struct lu_fid *newpfid,
1185 const struct lu_name *newlname,
1186 struct thandle *handle,
1187 struct linkea_data *ldata,
1188 int first, int check)
1193 if (ldata == NULL) {
1194 ldata = &mdd_env_info(env)->mti_link_data;
1195 memset(ldata, 0, sizeof(*ldata));
1196 rc = mdd_linkea_prepare(env, mdd_obj, oldpfid, oldlname,
1197 newpfid, newlname, first, check, ldata);
1202 if (!(mdd_obj->mod_flags & DEAD_OBJ))
1203 rc = mdd_links_write(env, mdd_obj, ldata, handle);
1209 if (newlname == NULL)
1210 CERROR("link_ea add failed %d "DFID"\n",
1211 rc, PFID(mdd_object_fid(mdd_obj)));
1212 else if (oldpfid == NULL)
1213 CERROR("link_ea add '%.*s' failed %d "DFID"\n",
1214 newlname->ln_namelen, newlname->ln_name, rc,
1215 PFID(mdd_object_fid(mdd_obj)));
1216 else if (newpfid == NULL)
1217 CERROR("link_ea del '%.*s' failed %d "DFID"\n",
1218 oldlname->ln_namelen, oldlname->ln_name, rc,
1219 PFID(mdd_object_fid(mdd_obj)));
1221 CERROR("link_ea rename '%.*s'->'%.*s' failed %d "DFID
1222 "\n", oldlname->ln_namelen, oldlname->ln_name,
1223 newlname->ln_namelen, newlname->ln_name, rc,
1224 PFID(mdd_object_fid(mdd_obj)));
1227 if (is_vmalloc_addr(ldata->ld_buf))
1228 /* if we vmalloced a large buffer drop it */
1229 lu_buf_free(ldata->ld_buf);
1234 static inline int mdd_links_add(const struct lu_env *env,
1235 struct mdd_object *mdd_obj,
1236 const struct lu_fid *pfid,
1237 const struct lu_name *lname,
1238 struct thandle *handle,
1239 struct linkea_data *ldata, int first)
1241 return mdd_links_rename(env, mdd_obj, NULL, NULL,
1242 pfid, lname, handle, ldata, first, 0);
1245 static inline int mdd_links_del(const struct lu_env *env,
1246 struct mdd_object *mdd_obj,
1247 const struct lu_fid *pfid,
1248 const struct lu_name *lname,
1249 struct thandle *handle)
1251 return mdd_links_rename(env, mdd_obj, pfid, lname,
1252 NULL, NULL, handle, NULL, 0, 0);
1255 /** Read the link EA into a temp buffer.
1256 * Uses the name_buf since it is generally large.
1257 * \retval IS_ERR err
1258 * \retval ptr to \a lu_buf (always \a mti_big_buf)
1260 struct lu_buf *mdd_links_get(const struct lu_env *env,
1261 struct mdd_object *mdd_obj)
1263 struct linkea_data ldata = { NULL };
1266 rc = mdd_links_read(env, mdd_obj, &ldata);
1267 return rc ? ERR_PTR(rc) : ldata.ld_buf;
1270 int mdd_links_write(const struct lu_env *env, struct mdd_object *mdd_obj,
1271 struct linkea_data *ldata, struct thandle *handle)
1273 const struct lu_buf *buf;
1276 if (ldata == NULL || ldata->ld_buf == NULL ||
1277 ldata->ld_leh == NULL)
1280 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NO_LINKEA))
1284 buf = mdd_buf_get_const(env, ldata->ld_buf->lb_buf,
1285 ldata->ld_leh->leh_len);
1286 rc = mdo_xattr_set(env, mdd_obj, buf, XATTR_NAME_LINK, 0, handle);
1287 if (unlikely(rc == -ENOSPC)) {
1288 rc = linkea_overflow_shrink(ldata);
1296 static int mdd_declare_links_add(const struct lu_env *env,
1297 struct mdd_object *mdd_obj,
1298 struct thandle *handle,
1299 struct linkea_data *ldata)
1305 if (ldata != NULL && ldata->ld_leh != NULL) {
1306 ea_len = ldata->ld_leh->leh_len;
1307 linkea = ldata->ld_buf->lb_buf;
1309 ea_len = MAX_LINKEA_SIZE;
1313 rc = mdo_declare_xattr_set(env, mdd_obj,
1314 mdd_buf_get_const(env, linkea, ea_len),
1315 XATTR_NAME_LINK, 0, handle);
1320 static inline int mdd_declare_links_del(const struct lu_env *env,
1321 struct mdd_object *c,
1322 struct thandle *handle)
1326 /* For directory, the linkEA will be removed together
1327 * with the object. */
1328 if (!S_ISDIR(mdd_object_type(c)))
1329 rc = mdd_declare_links_add(env, c, handle, NULL);
1334 static int mdd_declare_link(const struct lu_env *env,
1335 struct mdd_device *mdd,
1336 struct mdd_object *p,
1337 struct mdd_object *c,
1338 const struct lu_name *name,
1339 struct thandle *handle,
1341 struct linkea_data *data)
1343 struct lu_fid tfid = *mdo2fid(c);
1346 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DANGLING3))
1347 tfid.f_oid = cfs_fail_val;
1349 rc = mdo_declare_index_insert(env, p, &tfid, mdd_object_type(c),
1350 name->ln_name, handle);
1354 rc = mdo_declare_ref_add(env, c, handle);
1358 la->la_valid = LA_CTIME | LA_MTIME;
1359 rc = mdo_declare_attr_set(env, p, la, handle);
1363 la->la_valid = LA_CTIME;
1364 rc = mdo_declare_attr_set(env, c, la, handle);
1368 rc = mdd_declare_links_add(env, c, handle, data);
1372 rc = mdd_declare_changelog_store(env, mdd, CL_HARDLINK, name, NULL,
1378 static int mdd_link(const struct lu_env *env, struct md_object *tgt_obj,
1379 struct md_object *src_obj, const struct lu_name *lname,
1382 const char *name = lname->ln_name;
1383 struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix;
1384 struct mdd_object *mdd_tobj = md2mdd_obj(tgt_obj);
1385 struct mdd_object *mdd_sobj = md2mdd_obj(src_obj);
1386 struct lu_attr *cattr = MDD_ENV_VAR(env, cattr);
1387 struct lu_attr *tattr = MDD_ENV_VAR(env, tattr);
1388 struct mdd_device *mdd = mdo2mdd(src_obj);
1389 struct thandle *handle;
1390 struct lu_fid *tfid = &mdd_env_info(env)->mti_fid2;
1391 struct linkea_data *ldata = &mdd_env_info(env)->mti_link_data;
1395 rc = mdd_la_get(env, mdd_sobj, cattr);
1399 rc = mdd_la_get(env, mdd_tobj, tattr);
1404 * If we are using project inheritance, we only allow hard link
1405 * creation in our tree when the project IDs are the same;
1406 * otherwise the tree quota mechanism could be circumvented.
1408 if ((tattr->la_flags & LUSTRE_PROJINHERIT_FL) &&
1409 (tattr->la_projid != cattr->la_projid))
1412 handle = mdd_trans_create(env, mdd);
1414 GOTO(out_pending, rc = PTR_ERR(handle));
1416 memset(ldata, 0, sizeof(*ldata));
1418 LASSERT(ma->ma_attr.la_valid & LA_CTIME);
1419 la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime;
1421 /* Note: even this function will change ldata, but it comes from
1422 * thread_info, which is completely temporary and only seen in
1423 * this function, so we do not need reset ldata once it fails.*/
1424 rc = mdd_linkea_prepare(env, mdd_sobj, NULL, NULL, mdo2fid(mdd_tobj),
1425 lname, 0, 0, ldata);
1429 rc = mdd_declare_link(env, mdd, mdd_tobj, mdd_sobj, lname, handle,
1434 rc = mdd_trans_start(env, mdd, handle);
1438 mdd_write_lock(env, mdd_sobj, DT_TGT_CHILD);
1439 rc = mdd_link_sanity_check(env, mdd_tobj, tattr, lname, mdd_sobj,
1442 GOTO(out_unlock, rc);
1444 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LESS_NLINK)) {
1445 rc = mdo_ref_add(env, mdd_sobj, handle);
1447 GOTO(out_unlock, rc);
1450 *tfid = *mdo2fid(mdd_sobj);
1451 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DANGLING3))
1452 tfid->f_oid = cfs_fail_val;
1454 rc = __mdd_index_insert_only(env, mdd_tobj, tfid,
1455 mdd_object_type(mdd_sobj), name, handle);
1457 mdo_ref_del(env, mdd_sobj, handle);
1458 GOTO(out_unlock, rc);
1461 la->la_valid = LA_CTIME | LA_MTIME;
1462 rc = mdd_update_time(env, mdd_tobj, tattr, la, handle);
1464 GOTO(out_unlock, rc);
1466 la->la_valid = LA_CTIME;
1467 rc = mdd_update_time(env, mdd_sobj, cattr, la, handle);
1469 /* Note: The failure of links_add should not cause the
1470 * link failure, so do not check return value. */
1471 mdd_links_add(env, mdd_sobj, mdo2fid(mdd_tobj),
1472 lname, handle, ldata, 0);
1476 mdd_write_unlock(env, mdd_sobj);
1478 rc = mdd_changelog_ns_store(env, mdd, CL_HARDLINK, 0, mdd_sobj,
1479 mdo2fid(mdd_tobj), NULL, NULL,
1480 lname, NULL, handle);
1482 rc = mdd_trans_stop(env, mdd, rc, handle);
1483 if (is_vmalloc_addr(ldata->ld_buf))
1484 /* if we vmalloced a large buffer drop it */
1485 lu_buf_free(ldata->ld_buf);
1490 static int mdd_mark_orphan_object(const struct lu_env *env,
1491 struct mdd_object *obj, struct thandle *handle,
1494 struct lu_attr *attr = MDD_ENV_VAR(env, la_for_start);
1497 attr->la_valid = LA_FLAGS;
1498 attr->la_flags = LUSTRE_ORPHAN_FL;
1501 rc = mdo_declare_attr_set(env, obj, attr, handle);
1503 rc = mdo_attr_set(env, obj, attr, handle);
1508 static int mdd_declare_finish_unlink(const struct lu_env *env,
1509 struct mdd_object *obj,
1510 struct thandle *handle)
1514 /* Sigh, we do not know if the unlink object will become orphan in
1515 * declare phase, but fortunately the flags here does not matter
1516 * in current declare implementation */
1517 rc = mdd_mark_orphan_object(env, obj, handle, true);
1521 rc = mdo_declare_destroy(env, obj, handle);
1525 rc = mdd_orphan_declare_insert(env, obj, mdd_object_type(obj), handle);
1529 return mdd_declare_links_del(env, obj, handle);
1532 /* caller should take a lock before calling */
1533 int mdd_finish_unlink(const struct lu_env *env,
1534 struct mdd_object *obj, struct md_attr *ma,
1535 const struct mdd_object *pobj,
1536 const struct lu_name *lname,
1540 int is_dir = S_ISDIR(ma->ma_attr.la_mode);
1543 LASSERT(mdd_write_locked(env, obj) != 0);
1545 if (ma->ma_attr.la_nlink == 0 || is_dir) {
1546 /* add new orphan and the object
1547 * will be deleted during mdd_close() */
1548 obj->mod_flags |= DEAD_OBJ;
1549 if (obj->mod_count) {
1550 rc = mdd_orphan_insert(env, obj, th);
1552 CDEBUG(D_HA, "Object "DFID" is inserted into "
1553 "orphan list, open count = %d\n",
1554 PFID(mdd_object_fid(obj)),
1557 CERROR("Object "DFID" fail to be an orphan, "
1558 "open count = %d, maybe cause failed "
1560 PFID(mdd_object_fid(obj)),
1563 /* mark object as an orphan here, not
1564 * before mdd_orphan_insert() as racing
1565 * mdd_la_get() may propagate ORPHAN_OBJ
1566 * causing the asserition */
1567 rc = mdd_mark_orphan_object(env, obj, th, false);
1569 rc = mdo_destroy(env, obj, th);
1571 } else if (!is_dir) {
1572 /* old files may not have link ea; ignore errors */
1573 mdd_links_del(env, obj, mdo2fid(pobj), lname, th);
1581 * has mdd_write_lock on cobj already, but not on pobj yet
1583 int mdd_unlink_sanity_check(const struct lu_env *env, struct mdd_object *pobj,
1584 const struct lu_attr *pattr,
1585 struct mdd_object *cobj,
1586 const struct lu_attr *cattr)
1591 rc = mdd_may_delete(env, pobj, pattr, cobj, cattr, NULL, 1, 1);
1596 static int mdd_declare_unlink(const struct lu_env *env, struct mdd_device *mdd,
1597 struct mdd_object *p, struct mdd_object *c,
1598 const struct lu_name *name, struct md_attr *ma,
1599 struct thandle *handle, int no_name, int is_dir)
1601 struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix;
1604 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DANGLING2)) {
1605 if (likely(no_name == 0)) {
1606 rc = mdo_declare_index_delete(env, p, name->ln_name,
1613 rc = mdo_declare_ref_del(env, p, handle);
1619 LASSERT(ma->ma_attr.la_valid & LA_CTIME);
1620 la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime;
1621 la->la_valid = LA_CTIME | LA_MTIME;
1622 rc = mdo_declare_attr_set(env, p, la, handle);
1627 rc = mdo_declare_ref_del(env, c, handle);
1631 rc = mdo_declare_ref_del(env, c, handle);
1635 la->la_valid = LA_CTIME;
1636 rc = mdo_declare_attr_set(env, c, la, handle);
1640 rc = mdd_declare_finish_unlink(env, c, handle);
1644 /* FIXME: need changelog for remove entry */
1645 rc = mdd_declare_changelog_store(env, mdd, CL_UNLINK, name,
1653 * test if a file has an HSM archive
1654 * if HSM attributes are not found in ma update them from
1657 static bool mdd_hsm_archive_exists(const struct lu_env *env,
1658 struct mdd_object *obj,
1663 if (!(ma->ma_valid & MA_HSM)) {
1664 /* no HSM MD provided, read xattr */
1665 struct lu_buf *hsm_buf;
1666 const size_t buflen = sizeof(struct hsm_attrs);
1669 hsm_buf = mdd_buf_get(env, NULL, 0);
1670 lu_buf_alloc(hsm_buf, buflen);
1671 rc = mdo_xattr_get(env, obj, hsm_buf, XATTR_NAME_HSM);
1672 rc = lustre_buf2hsm(hsm_buf->lb_buf, rc, &ma->ma_hsm);
1673 lu_buf_free(hsm_buf);
1677 ma->ma_valid |= MA_HSM;
1679 if (ma->ma_hsm.mh_flags & HS_EXISTS)
1685 * Delete name entry and the object.
1686 * Note: no_name == 1 means it only destory the object, i.e. name_entry
1687 * does not exist for this object, and it could only happen during resending
1688 * of remote unlink. see the comments in mdt_reint_unlink. Unfortunately, lname
1689 * is also needed in this case(needed by changelog), so we have to add another
1690 * parameter(no_name)here. XXX: this is only needed in DNE phase I, on Phase II,
1691 * the ENOENT failure should be able to be fixed by redo mechanism.
1693 static int mdd_unlink(const struct lu_env *env, struct md_object *pobj,
1694 struct md_object *cobj, const struct lu_name *lname,
1695 struct md_attr *ma, int no_name)
1697 const char *name = lname->ln_name;
1698 struct lu_attr *pattr = MDD_ENV_VAR(env, pattr);
1699 struct lu_attr *cattr = MDD_ENV_VAR(env, cattr);
1700 struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix;
1701 struct mdd_object *mdd_pobj = md2mdd_obj(pobj);
1702 struct mdd_object *mdd_cobj = NULL;
1703 struct mdd_device *mdd = mdo2mdd(pobj);
1704 struct thandle *handle;
1705 int rc, is_dir = 0, cl_flags = 0;
1708 /* let shutdown to start */
1709 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLY_DATA_RACE, 1);
1711 /* cobj == NULL means only delete name entry */
1712 if (likely(cobj != NULL)) {
1713 mdd_cobj = md2mdd_obj(cobj);
1714 if (mdd_object_exists(mdd_cobj) == 0)
1718 rc = mdd_la_get(env, mdd_pobj, pattr);
1722 if (likely(mdd_cobj != NULL)) {
1724 rc = mdd_la_get(env, mdd_cobj, cattr);
1728 is_dir = S_ISDIR(cattr->la_mode);
1729 /* search for an existing archive.
1730 * we should check ahead as the object
1731 * can be destroyed in this transaction */
1732 if (mdd_hsm_archive_exists(env, mdd_cobj, ma))
1733 cl_flags |= CLF_UNLINK_HSM_EXISTS;
1736 rc = mdd_unlink_sanity_check(env, mdd_pobj, pattr, mdd_cobj, cattr);
1740 handle = mdd_trans_create(env, mdd);
1742 RETURN(PTR_ERR(handle));
1744 rc = mdd_declare_unlink(env, mdd, mdd_pobj, mdd_cobj,
1745 lname, ma, handle, no_name, is_dir);
1749 rc = mdd_trans_start(env, mdd, handle);
1753 if (likely(mdd_cobj != NULL))
1754 mdd_write_lock(env, mdd_cobj, DT_TGT_CHILD);
1756 if (likely(no_name == 0) && !OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DANGLING2)) {
1757 rc = __mdd_index_delete(env, mdd_pobj, name, is_dir, handle);
1762 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_MUL_REF) ||
1763 OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NO_NAMEENTRY))
1764 GOTO(cleanup, rc = 0);
1766 if (likely(mdd_cobj != NULL)) {
1767 rc = mdo_ref_del(env, mdd_cobj, handle);
1769 __mdd_index_insert_only(env, mdd_pobj,
1771 mdd_object_type(mdd_cobj),
1778 mdo_ref_del(env, mdd_cobj, handle);
1780 /* fetch updated nlink */
1781 rc = mdd_la_get(env, mdd_cobj, cattr);
1786 LASSERT(ma->ma_attr.la_valid & LA_CTIME);
1787 la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime;
1789 la->la_valid = LA_CTIME | LA_MTIME;
1790 rc = mdd_update_time(env, mdd_pobj, pattr, la, handle);
1794 /* Enough for only unlink the entry */
1795 if (unlikely(mdd_cobj == NULL))
1798 if (cattr->la_nlink > 0 || mdd_cobj->mod_count > 0) {
1799 /* update ctime of an unlinked file only if it is still
1800 * opened or a link still exists */
1801 la->la_valid = LA_CTIME;
1802 rc = mdd_update_time(env, mdd_cobj, cattr, la, handle);
1807 /* XXX: this transfer to ma will be removed with LOD/OSP */
1808 ma->ma_attr = *cattr;
1809 ma->ma_valid |= MA_INODE;
1810 rc = mdd_finish_unlink(env, mdd_cobj, ma, mdd_pobj, lname, handle);
1814 /* fetch updated nlink */
1815 rc = mdd_la_get(env, mdd_cobj, cattr);
1816 /* if object is removed then we can't get its attrs,
1818 if (rc == -ENOENT) {
1819 cattr->la_nlink = 0;
1823 if (cattr->la_nlink == 0) {
1824 ma->ma_attr = *cattr;
1825 ma->ma_valid |= MA_INODE;
1830 if (likely(mdd_cobj != NULL))
1831 mdd_write_unlock(env, mdd_cobj);
1834 if (cattr->la_nlink == 0)
1835 cl_flags |= CLF_UNLINK_LAST;
1837 cl_flags &= ~CLF_UNLINK_HSM_EXISTS;
1839 rc = mdd_changelog_ns_store(env, mdd,
1840 is_dir ? CL_RMDIR : CL_UNLINK, cl_flags,
1841 mdd_cobj, mdo2fid(mdd_pobj), NULL, NULL, lname, NULL,
1846 rc = mdd_trans_stop(env, mdd, rc, handle);
1852 * The permission has been checked when obj created, no need check again.
1854 static int mdd_cd_sanity_check(const struct lu_env *env,
1855 struct mdd_object *obj)
1860 if (!obj || mdd_is_dead_obj(obj))
1866 static int mdd_create_data(const struct lu_env *env,
1867 struct md_object *pobj,
1868 struct md_object *cobj,
1869 const struct md_op_spec *spec,
1872 struct mdd_device *mdd = mdo2mdd(cobj);
1873 struct mdd_object *mdd_pobj = md2mdd_obj(pobj);
1874 struct mdd_object *son = md2mdd_obj(cobj);
1875 struct thandle *handle;
1876 const struct lu_buf *buf;
1877 struct lu_attr *attr = MDD_ENV_VAR(env, cattr);
1878 struct dt_allocation_hint *hint = &mdd_env_info(env)->mti_hint;
1882 rc = mdd_cd_sanity_check(env, son);
1886 if (!md_should_create(spec->sp_cr_flags))
1890 * there are following use cases for this function:
1891 * 1) late striping - file was created with MDS_OPEN_DELAY_CREATE
1892 * striping can be specified or not
1895 rc = mdd_la_get(env, son, attr);
1899 /* calling ->ah_make_hint() is used to transfer information from parent */
1900 mdd_object_make_hint(env, mdd_pobj, son, attr, spec, hint);
1902 handle = mdd_trans_create(env, mdd);
1904 GOTO(out_free, rc = PTR_ERR(handle));
1907 * XXX: Setting the lov ea is not locked but setting the attr is locked?
1908 * Should this be fixed?
1910 CDEBUG(D_OTHER, "ea %p/%u, cr_flags %#llo, no_create %u\n",
1911 spec->u.sp_ea.eadata, spec->u.sp_ea.eadatalen,
1912 spec->sp_cr_flags, spec->no_create);
1914 if (spec->no_create || (spec->sp_cr_flags & MDS_OPEN_HAS_EA)) {
1915 buf = mdd_buf_get_const(env, spec->u.sp_ea.eadata,
1916 spec->u.sp_ea.eadatalen);
1921 rc = dt_declare_xattr_set(env, mdd_object_child(son), buf,
1922 XATTR_NAME_LOV, 0, handle);
1926 rc = mdd_declare_changelog_store(env, mdd, CL_LAYOUT, NULL, NULL,
1931 rc = mdd_trans_start(env, mdd, handle);
1935 rc = dt_xattr_set(env, mdd_object_child(son), buf, XATTR_NAME_LOV,
1941 rc = mdd_changelog_data_store(env, mdd, CL_LAYOUT, 0, son, handle);
1944 rc = mdd_trans_stop(env, mdd, rc, handle);
1950 static int mdd_declare_object_initialize(const struct lu_env *env,
1951 struct mdd_object *parent,
1952 struct mdd_object *child,
1953 const struct lu_attr *attr,
1954 struct thandle *handle)
1959 LASSERT(attr->la_valid & (LA_MODE | LA_TYPE));
1960 if (!S_ISDIR(attr->la_mode))
1963 rc = mdo_declare_index_insert(env, child, mdo2fid(child), S_IFDIR,
1968 rc = mdo_declare_ref_add(env, child, handle);
1972 rc = mdo_declare_index_insert(env, child, mdo2fid(parent), S_IFDIR,
1978 static int mdd_object_initialize(const struct lu_env *env,
1979 const struct lu_fid *pfid,
1980 struct mdd_object *child,
1981 struct lu_attr *attr,
1982 struct thandle *handle)
1987 if (S_ISDIR(attr->la_mode)) {
1988 /* Add "." and ".." for newly created dir */
1989 mdo_ref_add(env, child, handle);
1990 rc = __mdd_index_insert_only(env, child, mdo2fid(child),
1991 S_IFDIR, dot, handle);
1993 rc = __mdd_index_insert_only(env, child, pfid, S_IFDIR,
1996 mdo_ref_del(env, child, handle);
2003 * This function checks whether it can create a file/dir under the
2004 * directory(@pobj). The directory(@pobj) is not being locked by
2007 * \param[in] env execution environment
2008 * \param[in] pobj the directory to create files
2009 * \param[in] pattr the attributes of the directory
2010 * \param[in] lname the name of the created file/dir
2011 * \param[in] cattr the attributes of the file/dir
2012 * \param[in] spec create specification
2014 * \retval = 0 it is allowed to create file/dir under
2016 * \retval negative error not allowed to create file/dir
2017 * under the directory
2019 static int mdd_create_sanity_check(const struct lu_env *env,
2020 struct md_object *pobj,
2021 const struct lu_attr *pattr,
2022 const struct lu_name *lname,
2023 struct lu_attr *cattr,
2024 struct md_op_spec *spec)
2026 struct mdd_thread_info *info = mdd_env_info(env);
2027 struct lu_fid *fid = &info->mti_fid;
2028 struct mdd_object *obj = md2mdd_obj(pobj);
2029 struct mdd_device *m = mdo2mdd(pobj);
2030 bool check_perm = true;
2035 if (mdd_is_dead_obj(obj))
2039 * In some cases this lookup is not needed - we know before if name
2040 * exists or not because MDT performs lookup for it.
2041 * name length check is done in lookup.
2043 if (spec->sp_cr_lookup) {
2045 * Check if the name already exist, though it will be checked in
2046 * _index_insert also, for avoiding rolling back if exists
2049 rc = __mdd_lookup(env, pobj, pattr, lname, fid,
2050 MAY_WRITE | MAY_EXEC);
2052 RETURN(rc ? : -EEXIST);
2054 /* Permission is already being checked in mdd_lookup */
2058 if (S_ISDIR(cattr->la_mode) &&
2059 unlikely(spec != NULL && spec->sp_cr_flags & MDS_OPEN_HAS_EA) &&
2060 spec->u.sp_ea.eadata != NULL && spec->u.sp_ea.eadatalen > 0) {
2061 const struct lmv_user_md *lum = spec->u.sp_ea.eadata;
2063 if (!lmv_magic_supported(le32_to_cpu(lum->lum_magic)) &&
2064 le32_to_cpu(lum->lum_magic) != LMV_USER_MAGIC_V0) {
2066 CERROR("%s: invalid lmv_user_md: magic = %x, "
2067 "stripe_offset = %d, stripe_count = %u: "
2068 "rc = %d\n", mdd2obd_dev(m)->obd_name,
2069 le32_to_cpu(lum->lum_magic),
2070 (int)le32_to_cpu(lum->lum_stripe_offset),
2071 le32_to_cpu(lum->lum_stripe_count), rc);
2076 rc = mdd_may_create(env, obj, pattr, NULL, check_perm);
2081 if (pattr->la_mode & S_ISGID) {
2082 struct lu_ucred *uc = lu_ucred(env);
2084 cattr->la_gid = pattr->la_gid;
2086 /* Directories are special, and always inherit S_ISGID */
2087 if (S_ISDIR(cattr->la_mode)) {
2088 cattr->la_mode |= S_ISGID;
2089 cattr->la_valid |= LA_MODE;
2090 } else if ((cattr->la_mode & (S_ISGID | S_IXGRP))
2091 == (S_ISGID | S_IXGRP) &&
2092 !lustre_in_group_p(uc,
2093 (cattr->la_valid & LA_GID) ?
2094 cattr->la_gid : pattr->la_gid) &&
2095 !md_capable(uc, CFS_CAP_FSETID)) {
2096 cattr->la_mode &= ~S_ISGID;
2097 cattr->la_valid |= LA_MODE;
2101 /* Inherit project ID from parent directory */
2102 if (pattr->la_flags & LUSTRE_PROJINHERIT_FL) {
2103 cattr->la_projid = pattr->la_projid;
2104 if (S_ISDIR(cattr->la_mode)) {
2105 cattr->la_flags |= LUSTRE_PROJINHERIT_FL;
2106 cattr->la_valid |= LA_FLAGS;
2108 cattr->la_valid |= LA_PROJID;
2111 rc = mdd_name_check(m, lname);
2115 switch (cattr->la_mode & S_IFMT) {
2117 unsigned int symlen = strlen(spec->u.sp_symname) + 1;
2119 if (symlen > m->mdd_dt_conf.ddp_symlink_max)
2120 RETURN(-ENAMETOOLONG);
2139 static int mdd_declare_create_object(const struct lu_env *env,
2140 struct mdd_device *mdd,
2141 struct mdd_object *p, struct mdd_object *c,
2142 struct lu_attr *attr,
2143 struct thandle *handle,
2144 const struct md_op_spec *spec,
2145 struct lu_buf *def_acl_buf,
2146 struct lu_buf *acl_buf,
2147 struct lu_buf *hsm_buf,
2148 struct dt_allocation_hint *hint)
2150 const struct lu_buf *buf;
2153 rc = mdd_declare_create_object_internal(env, p, c, attr, handle, spec,
2158 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
2159 if (def_acl_buf && def_acl_buf->lb_len > 0 && S_ISDIR(attr->la_mode)) {
2160 /* if dir, then can inherit default ACl */
2161 rc = mdo_declare_xattr_set(env, c, def_acl_buf,
2162 XATTR_NAME_ACL_DEFAULT,
2168 if (acl_buf && acl_buf->lb_len > 0) {
2169 rc = mdo_declare_attr_set(env, c, attr, handle);
2173 rc = mdo_declare_xattr_set(env, c, acl_buf,
2174 XATTR_NAME_ACL_ACCESS, 0, handle);
2179 rc = mdd_declare_object_initialize(env, p, c, attr, handle);
2183 /* replay case, create LOV EA from client data */
2184 if ((!(spec->sp_cr_flags & MDS_OPEN_DELAY_CREATE) && spec->no_create) ||
2185 (spec->sp_cr_flags & MDS_OPEN_HAS_EA && S_ISREG(attr->la_mode))) {
2186 buf = mdd_buf_get_const(env, spec->u.sp_ea.eadata,
2187 spec->u.sp_ea.eadatalen);
2188 rc = mdo_declare_xattr_set(env, c, buf,
2189 S_ISDIR(attr->la_mode) ?
2190 XATTR_NAME_LMV : XATTR_NAME_LOV,
2195 if (spec->sp_cr_flags & MDS_OPEN_PCC) {
2196 rc = mdo_declare_xattr_set(env, c, hsm_buf,
2204 if (S_ISLNK(attr->la_mode)) {
2205 const char *target_name = spec->u.sp_symname;
2206 int sym_len = strlen(target_name);
2207 const struct lu_buf *buf;
2209 buf = mdd_buf_get_const(env, target_name, sym_len);
2210 rc = dt_declare_record_write(env, mdd_object_child(c),
2216 if (spec->sp_cr_file_secctx_name != NULL) {
2217 buf = mdd_buf_get_const(env, spec->sp_cr_file_secctx,
2218 spec->sp_cr_file_secctx_size);
2219 rc = mdo_declare_xattr_set(env, c, buf,
2220 spec->sp_cr_file_secctx_name, 0,
2229 static int mdd_declare_create(const struct lu_env *env, struct mdd_device *mdd,
2230 struct mdd_object *p, struct mdd_object *c,
2231 const struct lu_name *name,
2232 struct lu_attr *attr,
2233 struct thandle *handle,
2234 const struct md_op_spec *spec,
2235 struct linkea_data *ldata,
2236 struct lu_buf *def_acl_buf,
2237 struct lu_buf *acl_buf,
2238 struct lu_buf *hsm_buf,
2239 struct dt_allocation_hint *hint)
2243 rc = mdd_declare_create_object(env, mdd, p, c, attr, handle, spec,
2244 def_acl_buf, acl_buf, hsm_buf, hint);
2248 if (S_ISDIR(attr->la_mode)) {
2249 rc = mdo_declare_ref_add(env, p, handle);
2254 if (unlikely(spec->sp_cr_flags & MDS_OPEN_VOLATILE)) {
2255 rc = mdd_orphan_declare_insert(env, c, attr->la_mode, handle);
2259 struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix;
2260 enum changelog_rec_type type;
2262 rc = mdo_declare_index_insert(env, p, mdo2fid(c), attr->la_mode,
2263 name->ln_name, handle);
2267 rc = mdd_declare_links_add(env, c, handle, ldata);
2272 la->la_valid = LA_CTIME | LA_MTIME;
2273 rc = mdo_declare_attr_set(env, p, la, handle);
2277 type = S_ISDIR(attr->la_mode) ? CL_MKDIR :
2278 S_ISREG(attr->la_mode) ? CL_CREATE :
2279 S_ISLNK(attr->la_mode) ? CL_SOFTLINK : CL_MKNOD;
2281 rc = mdd_declare_changelog_store(env, mdd, type, name, NULL,
2290 static int mdd_acl_init(const struct lu_env *env, struct mdd_object *pobj,
2291 struct lu_attr *la, struct lu_buf *def_acl_buf,
2292 struct lu_buf *acl_buf)
2297 if (S_ISLNK(la->la_mode)) {
2298 acl_buf->lb_len = 0;
2299 def_acl_buf->lb_len = 0;
2303 mdd_read_lock(env, pobj, DT_TGT_PARENT);
2304 rc = mdo_xattr_get(env, pobj, def_acl_buf,
2305 XATTR_NAME_ACL_DEFAULT);
2306 mdd_read_unlock(env, pobj);
2308 /* If there are default ACL, fix mode/ACL by default ACL */
2309 def_acl_buf->lb_len = rc;
2310 LASSERT(def_acl_buf->lb_len <= acl_buf->lb_len);
2311 memcpy(acl_buf->lb_buf, def_acl_buf->lb_buf, rc);
2312 acl_buf->lb_len = rc;
2313 rc = __mdd_fix_mode_acl(env, acl_buf, &la->la_mode);
2316 } else if (rc == -ENODATA || rc == -EOPNOTSUPP) {
2317 /* If there are no default ACL, fix mode by mask */
2318 struct lu_ucred *uc = lu_ucred(env);
2320 /* The create triggered by MDT internal events, such as
2321 * LFSCK reset, will not contain valid "uc". */
2322 if (unlikely(uc != NULL))
2323 la->la_mode &= ~uc->uc_umask;
2325 acl_buf->lb_len = 0;
2326 def_acl_buf->lb_len = 0;
2333 * Create a metadata object and initialize it, set acl, xattr.
2335 static int mdd_create_object(const struct lu_env *env, struct mdd_object *pobj,
2336 struct mdd_object *son, struct lu_attr *attr,
2337 struct md_op_spec *spec, struct lu_buf *acl_buf,
2338 struct lu_buf *def_acl_buf,
2339 struct lu_buf *hsm_buf,
2340 struct dt_allocation_hint *hint,
2341 struct thandle *handle, bool initsecctx)
2343 const struct lu_buf *buf;
2346 mdd_write_lock(env, son, DT_TGT_CHILD);
2347 rc = mdd_create_object_internal(env, NULL, son, attr, handle, spec,
2352 /* Note: In DNE phase I, for striped dir, though sub-stripes will be
2353 * created in declare phase, they also needs to be added to master
2354 * object as sub-directory entry. So it has to initialize the master
2355 * object, then set dir striped EA.(in mdo_xattr_set) */
2356 rc = mdd_object_initialize(env, mdo2fid(pobj), son, attr, handle);
2358 GOTO(err_destroy, rc);
2361 * in case of replay we just set LOVEA provided by the client
2362 * XXX: I think it would be interesting to try "old" way where
2363 * MDT calls this xattr_set(LOV) in a different transaction.
2364 * probably this way we code can be made better.
2367 /* During creation, there are only a few cases we need do xattr_set to
2369 * 1. regular file: see comments above.
2370 * 2. dir: inherit default striping or pool settings from parent.
2371 * 3. create striped directory with provided stripeEA.
2372 * 4. create striped directory because inherit default layout from the
2375 if (spec->no_create ||
2376 (S_ISREG(attr->la_mode) && spec->sp_cr_flags & MDS_OPEN_HAS_EA) ||
2377 S_ISDIR(attr->la_mode)) {
2378 buf = mdd_buf_get_const(env, spec->u.sp_ea.eadata,
2379 spec->u.sp_ea.eadatalen);
2380 rc = mdo_xattr_set(env, son, buf,
2381 S_ISDIR(attr->la_mode) ? XATTR_NAME_LMV :
2385 GOTO(err_destroy, rc);
2388 if (S_ISREG(attr->la_mode) && spec->sp_cr_flags & MDS_OPEN_PCC) {
2391 memset(&mh, 0, sizeof(mh));
2392 mh.mh_flags = HS_EXISTS | HS_ARCHIVED | HS_RELEASED;
2393 mh.mh_arch_id = spec->sp_archive_id;
2394 lustre_hsm2buf(hsm_buf->lb_buf, &mh);
2395 rc = mdo_xattr_set(env, son, hsm_buf, XATTR_NAME_HSM,
2398 GOTO(err_destroy, rc);
2401 #ifdef CONFIG_LUSTRE_FS_POSIX_ACL
2402 if (def_acl_buf != NULL && def_acl_buf->lb_len > 0 &&
2403 S_ISDIR(attr->la_mode)) {
2404 /* set default acl */
2405 rc = mdo_xattr_set(env, son, def_acl_buf,
2406 XATTR_NAME_ACL_DEFAULT, 0,
2409 GOTO(err_destroy, rc);
2411 /* set its own acl */
2412 if (acl_buf != NULL && acl_buf->lb_len > 0) {
2413 rc = mdo_xattr_set(env, son, acl_buf,
2414 XATTR_NAME_ACL_ACCESS,
2417 GOTO(err_destroy, rc);
2421 if (S_ISLNK(attr->la_mode)) {
2422 struct dt_object *dt = mdd_object_child(son);
2423 const char *target_name = spec->u.sp_symname;
2424 int sym_len = strlen(target_name);
2427 buf = mdd_buf_get_const(env, target_name, sym_len);
2428 rc = dt->do_body_ops->dbo_write(env, dt, buf, &pos, handle);
2432 GOTO(err_initlized, rc = -EFAULT);
2435 if (initsecctx && spec->sp_cr_file_secctx_name != NULL) {
2436 buf = mdd_buf_get_const(env, spec->sp_cr_file_secctx,
2437 spec->sp_cr_file_secctx_size);
2438 rc = mdo_xattr_set(env, son, buf, spec->sp_cr_file_secctx_name,
2441 GOTO(err_initlized, rc);
2445 if (unlikely(rc != 0)) {
2447 if (S_ISDIR(attr->la_mode)) {
2448 /* Drop the reference, no need to delete "."/"..",
2449 * because the object to be destroied directly. */
2450 rc2 = mdo_ref_del(env, son, handle);
2454 rc2 = mdo_ref_del(env, son, handle);
2458 mdo_destroy(env, son, handle);
2461 mdd_write_unlock(env, son);
2465 static int mdd_index_delete(const struct lu_env *env,
2466 struct mdd_object *mdd_pobj,
2467 struct lu_attr *cattr,
2468 const struct lu_name *lname)
2470 struct mdd_device *mdd = mdo2mdd(&mdd_pobj->mod_obj);
2471 struct thandle *handle;
2475 handle = mdd_trans_create(env, mdd);
2477 RETURN(PTR_ERR(handle));
2479 rc = mdo_declare_index_delete(env, mdd_pobj, lname->ln_name,
2484 if (S_ISDIR(cattr->la_mode)) {
2485 rc = mdo_declare_ref_del(env, mdd_pobj, handle);
2490 /* Since this will only be used in the error handler path,
2491 * Let's set the thandle to be local and not mess the transno */
2492 handle->th_local = 1;
2493 rc = mdd_trans_start(env, mdd, handle);
2497 rc = __mdd_index_delete(env, mdd_pobj, lname->ln_name,
2498 S_ISDIR(cattr->la_mode), handle);
2502 rc = mdd_trans_stop(env, mdd, rc, handle);
2508 * Create object and insert it into namespace.
2510 * Two operations have to be performed:
2512 * - an allocation of a new object (->do_create()), and
2513 * - an insertion into a parent index (->dio_insert()).
2515 * Due to locking, operation order is not important, when both are
2516 * successful, *but* error handling cases are quite different:
2518 * - if insertion is done first, and following object creation fails,
2519 * insertion has to be rolled back, but this operation might fail
2520 * also leaving us with dangling index entry.
2522 * - if creation is done first, is has to be undone if insertion fails,
2523 * leaving us with leaked space, which is not good but not fatal.
2525 * It seems that creation-first is simplest solution, but it is sub-optimal
2531 * case, because second mkdir is bound to create object, only to
2532 * destroy it immediately.
2534 * To avoid this follow local file systems that do double lookup:
2536 * 0. lookup -> -EEXIST (mdd_create_sanity_check())
2537 * 1. create (mdd_create_object_internal())
2538 * 2. insert (__mdd_index_insert(), lookup again)
2540 * \param[in] pobj parent object
2541 * \param[in] lname name of child being created
2542 * \param[in,out] child child object being created
2543 * \param[in] spec additional create parameters
2544 * \param[in] ma attributes for new child object
2546 * \retval 0 on success
2547 * \retval negative errno on failure
2549 int mdd_create(const struct lu_env *env, struct md_object *pobj,
2550 const struct lu_name *lname, struct md_object *child,
2551 struct md_op_spec *spec, struct md_attr *ma)
2553 struct mdd_thread_info *info = mdd_env_info(env);
2554 struct lu_attr *la = &info->mti_la_for_fix;
2555 struct mdd_object *mdd_pobj = md2mdd_obj(pobj);
2556 struct mdd_object *son = md2mdd_obj(child);
2557 struct mdd_device *mdd = mdo2mdd(pobj);
2558 struct lu_attr *attr = &ma->ma_attr;
2559 struct thandle *handle;
2560 struct lu_attr *pattr = &info->mti_pattr;
2561 struct lu_buf acl_buf;
2562 struct lu_buf def_acl_buf;
2563 struct lu_buf hsm_buf;
2564 struct linkea_data *ldata = &info->mti_link_data;
2565 const char *name = lname->ln_name;
2566 struct dt_allocation_hint *hint = &mdd_env_info(env)->mti_hint;
2571 rc = mdd_la_get(env, mdd_pobj, pattr);
2575 /* Sanity checks before big job. */
2576 rc = mdd_create_sanity_check(env, pobj, pattr, lname, attr, spec);
2580 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DQACQ_NET))
2581 GOTO(out_free, rc = -EINPROGRESS);
2583 handle = mdd_trans_create(env, mdd);
2585 GOTO(out_free, rc = PTR_ERR(handle));
2587 lu_buf_check_and_alloc(&info->mti_xattr_buf,
2588 min_t(unsigned int, mdd->mdd_dt_conf.ddp_max_ea_size,
2590 acl_buf = info->mti_xattr_buf;
2591 def_acl_buf.lb_buf = info->mti_key;
2592 def_acl_buf.lb_len = sizeof(info->mti_key);
2593 rc = mdd_acl_init(env, mdd_pobj, attr, &def_acl_buf, &acl_buf);
2597 if (S_ISDIR(attr->la_mode)) {
2598 struct lmv_user_md *lmu = spec->u.sp_ea.eadata;
2601 * migrate may create 1-stripe directory, so lod_ah_init()
2602 * doesn't adjust stripe count from lmu.
2604 if (lmu && lmu->lum_stripe_count == cpu_to_le32(1)) {
2605 info->mti_lmu = *lmu;
2606 info->mti_lmu.lum_stripe_count = 0;
2607 spec->u.sp_ea.eadata = &info->mti_lmu;
2611 mdd_object_make_hint(env, mdd_pobj, son, attr, spec, hint);
2613 memset(ldata, 0, sizeof(*ldata));
2614 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PARENT)) {
2615 struct lu_fid tfid = *mdd_object_fid(mdd_pobj);
2618 rc = mdd_linkea_prepare(env, son, NULL, NULL,
2619 &tfid, lname, 1, 0, ldata);
2621 rc = mdd_linkea_prepare(env, son, NULL, NULL,
2622 mdd_object_fid(mdd_pobj),
2623 lname, 1, 0, ldata);
2626 if (spec->sp_cr_flags & MDS_OPEN_PCC) {
2627 LASSERT(spec->sp_cr_flags & MDS_OPEN_HAS_EA);
2629 memset(&hsm_buf, 0, sizeof(hsm_buf));
2630 lu_buf_alloc(&hsm_buf, sizeof(struct hsm_attrs));
2631 if (hsm_buf.lb_buf == NULL)
2632 GOTO(out_stop, rc = -ENOMEM);
2635 rc = mdd_declare_create(env, mdd, mdd_pobj, son, lname, attr,
2636 handle, spec, ldata, &def_acl_buf, &acl_buf,
2641 rc = mdd_trans_start(env, mdd, handle);
2645 rc = mdd_create_object(env, mdd_pobj, son, attr, spec, &acl_buf,
2646 &def_acl_buf, &hsm_buf, hint, handle, true);
2650 if (unlikely(spec->sp_cr_flags & MDS_OPEN_VOLATILE)) {
2651 mdd_write_lock(env, son, DT_TGT_CHILD);
2652 son->mod_flags |= VOLATILE_OBJ;
2653 rc = mdd_orphan_insert(env, son, handle);
2654 GOTO(out_volatile, rc);
2656 rc = __mdd_index_insert(env, mdd_pobj, mdo2fid(son),
2657 attr->la_mode, name, handle);
2659 GOTO(err_created, rc);
2661 mdd_links_add(env, son, mdo2fid(mdd_pobj), lname, handle,
2664 /* update parent directory mtime/ctime */
2666 la->la_valid = LA_CTIME | LA_MTIME;
2667 rc = mdd_update_time(env, mdd_pobj, pattr, la, handle);
2669 GOTO(err_insert, rc);
2675 if (spec->sp_cr_flags & MDS_OPEN_VOLATILE)
2676 rc2 = mdd_orphan_delete(env, son, handle);
2678 rc2 = __mdd_index_delete(env, mdd_pobj, name,
2679 S_ISDIR(attr->la_mode),
2685 mdd_write_lock(env, son, DT_TGT_CHILD);
2686 if (S_ISDIR(attr->la_mode)) {
2687 /* Drop the reference, no need to delete "."/"..",
2688 * because the object is to be destroyed directly. */
2689 rc2 = mdo_ref_del(env, son, handle);
2691 mdd_write_unlock(env, son);
2696 /* For volatile files drop one link immediately, since there is
2697 * no filename in the namespace, and save any error returned. */
2698 rc2 = mdo_ref_del(env, son, handle);
2700 mdd_write_unlock(env, son);
2701 if (unlikely(rc == 0))
2706 /* Don't destroy the volatile object on success */
2707 if (likely(rc != 0))
2708 mdo_destroy(env, son, handle);
2709 mdd_write_unlock(env, son);
2712 if (rc == 0 && fid_is_namespace_visible(mdo2fid(son)) &&
2713 likely((spec->sp_cr_flags & MDS_OPEN_VOLATILE) == 0))
2714 rc = mdd_changelog_ns_store(env, mdd,
2715 S_ISDIR(attr->la_mode) ? CL_MKDIR :
2716 S_ISREG(attr->la_mode) ? CL_CREATE :
2717 S_ISLNK(attr->la_mode) ? CL_SOFTLINK : CL_MKNOD,
2718 0, son, mdo2fid(mdd_pobj), NULL, NULL, lname,
2721 rc2 = mdd_trans_stop(env, mdd, rc, handle);
2723 /* If creation fails, it is most likely due to the remote update
2724 * failure, because local transaction will mostly succeed at
2725 * this stage. There is no easy way to rollback all of previous
2726 * updates, so let's remove the object from namespace, and
2727 * LFSCK should handle the orphan object. */
2728 if (rc2 < 0 && !mdd_object_remote(mdd_pobj))
2729 mdd_index_delete(env, mdd_pobj, attr, lname);
2733 if (is_vmalloc_addr(ldata->ld_buf))
2734 /* if we vmalloced a large buffer drop it */
2735 lu_buf_free(ldata->ld_buf);
2737 if (spec->sp_cr_flags & MDS_OPEN_PCC)
2738 lu_buf_free(&hsm_buf);
2740 /* The child object shouldn't be cached anymore */
2742 set_bit(LU_OBJECT_HEARD_BANSHEE,
2743 &child->mo_lu.lo_header->loh_flags);
2748 * Get locks on parents in proper order
2749 * RETURN: < 0 - error, rename_order if successful
2757 static int mdd_rename_order(const struct lu_env *env,
2758 struct mdd_device *mdd,
2759 struct mdd_object *src_pobj,
2760 const struct lu_attr *pattr,
2761 struct mdd_object *tgt_pobj)
2763 /* order of locking, 1 - tgt-src, 0 - src-tgt*/
2767 if (src_pobj == tgt_pobj)
2768 RETURN(MDD_RN_SAME);
2770 /* compared the parent child relationship of src_p&tgt_p */
2771 if (lu_fid_eq(&mdd->mdd_root_fid, mdo2fid(src_pobj))){
2773 } else if (lu_fid_eq(&mdd->mdd_root_fid, mdo2fid(tgt_pobj))) {
2776 rc = mdd_is_parent(env, mdd, src_pobj, pattr,
2790 /* has not mdd_write{read}_lock on any obj yet. */
2791 static int mdd_rename_sanity_check(const struct lu_env *env,
2792 struct mdd_object *src_pobj,
2793 const struct lu_attr *pattr,
2794 struct mdd_object *tgt_pobj,
2795 const struct lu_attr *tpattr,
2796 struct mdd_object *sobj,
2797 const struct lu_attr *cattr,
2798 struct mdd_object *tobj,
2799 const struct lu_attr *tattr)
2804 /* XXX: when get here, sobj must NOT be NULL,
2805 * the other case has been processed in cld_rename
2806 * before mdd_rename and enable MDS_PERM_BYPASS. */
2810 * If we are using project inheritance, we only allow renames
2811 * into our tree when the project IDs are the same; otherwise
2812 * tree quota mechanism would be circumvented.
2814 if (((tpattr->la_flags & LUSTRE_PROJINHERIT_FL) &&
2815 tpattr->la_projid != cattr->la_projid) ||
2816 ((pattr->la_flags & LUSTRE_PROJINHERIT_FL) &&
2817 (pattr->la_projid != tpattr->la_projid)))
2820 rc = mdd_may_delete(env, src_pobj, pattr, sobj, cattr, NULL, 1, 0);
2824 /* XXX: when get here, "tobj == NULL" means tobj must
2825 * NOT exist (neither on remote MDS, such case has been
2826 * processed in cld_rename before mdd_rename and enable
2828 * So check may_create, but not check may_unlink. */
2830 rc = mdd_may_create(env, tgt_pobj, tpattr, NULL,
2831 (src_pobj != tgt_pobj));
2833 rc = mdd_may_delete(env, tgt_pobj, tpattr, tobj, tattr, cattr,
2834 (src_pobj != tgt_pobj), 1);
2836 if (!rc && !tobj && (src_pobj != tgt_pobj) && S_ISDIR(cattr->la_mode))
2837 rc = __mdd_may_link(env, tgt_pobj, tpattr);
2842 static int mdd_declare_rename(const struct lu_env *env,
2843 struct mdd_device *mdd,
2844 struct mdd_object *mdd_spobj,
2845 struct mdd_object *mdd_tpobj,
2846 struct mdd_object *mdd_sobj,
2847 struct mdd_object *mdd_tobj,
2848 const struct lu_name *sname,
2849 const struct lu_name *tname,
2851 struct linkea_data *ldata,
2852 struct thandle *handle)
2854 struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix;
2857 LASSERT(ma->ma_attr.la_valid & LA_CTIME);
2858 la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime;
2864 /* name from source dir */
2865 rc = mdo_declare_index_delete(env, mdd_spobj, sname->ln_name, handle);
2869 /* .. from source child */
2870 if (S_ISDIR(mdd_object_type(mdd_sobj))) {
2871 /* source child can be directory,
2872 * counted by source dir's nlink */
2873 rc = mdo_declare_ref_del(env, mdd_spobj, handle);
2876 if (mdd_spobj != mdd_tpobj) {
2877 rc = mdo_declare_index_delete(env, mdd_sobj, dotdot,
2882 rc = mdo_declare_index_insert(env, mdd_sobj,
2884 S_IFDIR, dotdot, handle);
2889 /* new target child can be directory,
2890 * counted by target dir's nlink */
2891 rc = mdo_declare_ref_add(env, mdd_tpobj, handle);
2896 la->la_valid = LA_CTIME | LA_MTIME;
2897 rc = mdo_declare_attr_set(env, mdd_spobj, la, handle);
2901 rc = mdo_declare_attr_set(env, mdd_tpobj, la, handle);
2905 la->la_valid = LA_CTIME;
2906 rc = mdo_declare_attr_set(env, mdd_sobj, la, handle);
2910 rc = mdd_declare_links_add(env, mdd_sobj, handle, ldata);
2915 rc = mdo_declare_index_insert(env, mdd_tpobj, mdo2fid(mdd_sobj),
2916 mdd_object_type(mdd_sobj),
2917 tname->ln_name, handle);
2921 if (mdd_tobj && mdd_object_exists(mdd_tobj)) {
2922 /* delete target child in target parent directory */
2923 rc = mdo_declare_index_delete(env, mdd_tpobj, tname->ln_name,
2928 rc = mdo_declare_ref_del(env, mdd_tobj, handle);
2932 if (S_ISDIR(mdd_object_type(mdd_tobj))) {
2933 /* target child can be directory,
2934 * delete "." reference in target child directory */
2935 rc = mdo_declare_ref_del(env, mdd_tobj, handle);
2939 /* delete ".." reference in target parent directory */
2940 rc = mdo_declare_ref_del(env, mdd_tpobj, handle);
2945 la->la_valid = LA_CTIME;
2946 rc = mdo_declare_attr_set(env, mdd_tobj, la, handle);
2950 rc = mdd_declare_finish_unlink(env, mdd_tobj, handle);
2955 rc = mdd_declare_changelog_store(env, mdd, CL_RENAME, tname, sname,
2963 /* src object can be remote that is why we use only fid and type of object */
2964 static int mdd_rename(const struct lu_env *env,
2965 struct md_object *src_pobj, struct md_object *tgt_pobj,
2966 const struct lu_fid *lf, const struct lu_name *lsname,
2967 struct md_object *tobj, const struct lu_name *ltname,
2970 const char *sname = lsname->ln_name;
2971 const char *tname = ltname->ln_name;
2972 struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix;
2973 struct mdd_object *mdd_spobj = md2mdd_obj(src_pobj); /* source parent */
2974 struct mdd_object *mdd_tpobj = md2mdd_obj(tgt_pobj);
2975 struct mdd_device *mdd = mdo2mdd(src_pobj);
2976 struct mdd_object *mdd_sobj = NULL; /* source object */
2977 struct mdd_object *mdd_tobj = NULL;
2978 struct lu_attr *cattr = MDD_ENV_VAR(env, cattr);
2979 struct lu_attr *pattr = MDD_ENV_VAR(env, pattr);
2980 struct lu_attr *tattr = MDD_ENV_VAR(env, tattr);
2981 struct lu_attr *tpattr = MDD_ENV_VAR(env, tpattr);
2982 struct thandle *handle;
2983 struct linkea_data *ldata = &mdd_env_info(env)->mti_link_data;
2984 const struct lu_fid *tpobj_fid = mdo2fid(mdd_tpobj);
2985 const struct lu_fid *spobj_fid = mdo2fid(mdd_spobj);
2988 bool tobj_locked = 0;
2989 unsigned cl_flags = 0;
2993 /* let unlink to complete and commit */
2994 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLY_DATA_RACE, 2 + cfs_fail_val);
2997 mdd_tobj = md2mdd_obj(tobj);
2999 mdd_sobj = mdd_object_find(env, mdd, lf);
3000 if (IS_ERR(mdd_sobj))
3001 RETURN(PTR_ERR(mdd_sobj));
3003 rc = mdd_la_get(env, mdd_sobj, cattr);
3005 GOTO(out_pending, rc);
3007 rc = mdd_la_get(env, mdd_spobj, pattr);
3009 GOTO(out_pending, rc);
3012 rc = mdd_la_get(env, mdd_tobj, tattr);
3014 GOTO(out_pending, rc);
3015 /* search for an existing archive.
3016 * we should check ahead as the object
3017 * can be destroyed in this transaction */
3018 if (mdd_hsm_archive_exists(env, mdd_tobj, ma))
3019 cl_flags |= CLF_RENAME_LAST_EXISTS;
3022 rc = mdd_la_get(env, mdd_tpobj, tpattr);
3024 GOTO(out_pending, rc);
3026 rc = mdd_rename_sanity_check(env, mdd_spobj, pattr, mdd_tpobj, tpattr,
3027 mdd_sobj, cattr, mdd_tobj, tattr);
3029 GOTO(out_pending, rc);
3031 rc = mdd_name_check(mdd, ltname);
3033 GOTO(out_pending, rc);
3035 /* FIXME: Should consider tobj and sobj too in rename_lock. */
3036 rc = mdd_rename_order(env, mdd, mdd_spobj, pattr, mdd_tpobj);
3038 GOTO(out_pending, rc);
3040 handle = mdd_trans_create(env, mdd);
3042 GOTO(out_pending, rc = PTR_ERR(handle));
3044 memset(ldata, 0, sizeof(*ldata));
3045 rc = mdd_linkea_prepare(env, mdd_sobj, mdd_object_fid(mdd_spobj),
3046 lsname, mdd_object_fid(mdd_tpobj), ltname,
3051 rc = mdd_declare_rename(env, mdd, mdd_spobj, mdd_tpobj, mdd_sobj,
3052 mdd_tobj, lsname, ltname, ma, ldata, handle);
3056 rc = mdd_trans_start(env, mdd, handle);
3060 is_dir = S_ISDIR(cattr->la_mode);
3062 /* Remove source name from source directory */
3063 rc = __mdd_index_delete(env, mdd_spobj, sname, is_dir, handle);
3067 /* "mv dir1 dir2" needs "dir1/.." link update */
3068 if (is_dir && !lu_fid_eq(spobj_fid, tpobj_fid)) {
3069 rc = __mdd_index_delete_only(env, mdd_sobj, dotdot, handle);
3071 GOTO(fixup_spobj2, rc);
3073 rc = __mdd_index_insert_only(env, mdd_sobj, tpobj_fid, S_IFDIR,
3076 GOTO(fixup_spobj, rc);
3079 if (mdd_tobj != NULL && mdd_object_exists(mdd_tobj)) {
3080 rc = __mdd_index_delete(env, mdd_tpobj, tname, is_dir, handle);
3082 /* tname might been renamed to something else */
3083 GOTO(fixup_spobj, rc);
3086 /* Insert new fid with target name into target dir */
3087 rc = __mdd_index_insert(env, mdd_tpobj, lf, cattr->la_mode,
3090 GOTO(fixup_tpobj, rc);
3092 LASSERT(ma->ma_attr.la_valid & LA_CTIME);
3093 la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime;
3095 /* XXX: mdd_sobj must be local one if it is NOT NULL. */
3096 la->la_valid = LA_CTIME;
3097 rc = mdd_update_time(env, mdd_sobj, cattr, la, handle);
3099 GOTO(fixup_tpobj, rc);
3101 /* Update the linkEA for the source object */
3102 mdd_write_lock(env, mdd_sobj, DT_SRC_CHILD);
3103 rc = mdd_links_rename(env, mdd_sobj, mdo2fid(mdd_spobj), lsname,
3104 mdo2fid(mdd_tpobj), ltname, handle, ldata,
3107 /* Old files might not have EA entry */
3108 mdd_links_add(env, mdd_sobj, mdo2fid(mdd_spobj),
3109 lsname, handle, NULL, 0);
3110 mdd_write_unlock(env, mdd_sobj);
3111 /* We don't fail the transaction if the link ea can't be
3112 updated -- fid2path will use alternate lookup method. */
3115 /* Remove old target object
3116 * For tobj is remote case cmm layer has processed
3117 * and set tobj to NULL then. So when tobj is NOT NULL,
3118 * it must be local one.
3120 if (tobj && mdd_object_exists(mdd_tobj)) {
3121 mdd_write_lock(env, mdd_tobj, DT_TGT_CHILD);
3123 if (mdd_is_dead_obj(mdd_tobj)) {
3124 /* shld not be dead, something is wrong */
3125 CERROR("tobj is dead, something is wrong\n");
3129 mdo_ref_del(env, mdd_tobj, handle);
3131 /* Remove dot reference. */
3132 if (S_ISDIR(tattr->la_mode))
3133 mdo_ref_del(env, mdd_tobj, handle);
3136 /* fetch updated nlink */
3137 rc = mdd_la_get(env, mdd_tobj, tattr);
3139 CERROR("%s: Failed to get nlink for tobj "
3141 mdd2obd_dev(mdd)->obd_name,
3142 PFID(tpobj_fid), rc);
3143 GOTO(fixup_tpobj, rc);
3146 la->la_valid = LA_CTIME;
3147 rc = mdd_update_time(env, mdd_tobj, tattr, la, handle);
3149 CERROR("%s: Failed to set ctime for tobj "
3151 mdd2obd_dev(mdd)->obd_name,
3152 PFID(tpobj_fid), rc);
3153 GOTO(fixup_tpobj, rc);
3156 /* XXX: this transfer to ma will be removed with LOD/OSP */
3157 ma->ma_attr = *tattr;
3158 ma->ma_valid |= MA_INODE;
3159 rc = mdd_finish_unlink(env, mdd_tobj, ma, mdd_tpobj, ltname,
3162 CERROR("%s: Failed to unlink tobj "
3164 mdd2obd_dev(mdd)->obd_name,
3165 PFID(tpobj_fid), rc);
3166 GOTO(fixup_tpobj, rc);
3169 /* fetch updated nlink */
3170 rc = mdd_la_get(env, mdd_tobj, tattr);
3171 if (rc == -ENOENT) {
3172 /* the object got removed, let's
3173 * return the latest known attributes */
3174 tattr->la_nlink = 0;
3176 } else if (rc != 0) {
3177 CERROR("%s: Failed to get nlink for tobj "
3179 mdd2obd_dev(mdd)->obd_name,
3180 PFID(tpobj_fid), rc);
3181 GOTO(fixup_tpobj, rc);
3183 /* XXX: this transfer to ma will be removed with LOD/OSP */
3184 ma->ma_attr = *tattr;
3185 ma->ma_valid |= MA_INODE;
3187 if (tattr->la_nlink == 0)
3188 cl_flags |= CLF_RENAME_LAST;
3190 cl_flags &= ~CLF_RENAME_LAST_EXISTS;
3193 la->la_valid = LA_CTIME | LA_MTIME;
3194 rc = mdd_update_time(env, mdd_spobj, pattr, la, handle);
3196 GOTO(fixup_tpobj, rc);
3198 if (mdd_spobj != mdd_tpobj) {
3199 la->la_valid = LA_CTIME | LA_MTIME;
3200 rc = mdd_update_time(env, mdd_tpobj, tpattr, la, handle);
3202 GOTO(fixup_tpobj, rc);
3209 rc2 = __mdd_index_delete(env, mdd_tpobj, tname, is_dir, handle);
3211 CWARN("tp obj fix error %d\n",rc2);
3213 if (mdd_tobj && mdd_object_exists(mdd_tobj) &&
3214 !mdd_is_dead_obj(mdd_tobj)) {
3216 mdo_ref_add(env, mdd_tobj, handle);
3218 mdo_ref_add(env, mdd_tobj, handle);
3221 rc2 = __mdd_index_insert(env, mdd_tpobj,
3223 mdd_object_type(mdd_tobj),
3226 CWARN("tp obj fix error: rc = %d\n", rc2);
3231 if (rc && is_dir && mdd_sobj && mdd_spobj != mdd_tpobj) {
3232 rc2 = __mdd_index_delete_only(env, mdd_sobj, dotdot, handle);
3234 CWARN("%s: sp obj dotdot delete error: rc = %d\n",
3235 mdd2obd_dev(mdd)->obd_name, rc2);
3238 rc2 = __mdd_index_insert_only(env, mdd_sobj, spobj_fid, S_IFDIR,
3241 CWARN("%s: sp obj dotdot insert error: rc = %d\n",
3242 mdd2obd_dev(mdd)->obd_name, rc2);
3247 rc2 = __mdd_index_insert(env, mdd_spobj, lf,
3248 mdd_object_type(mdd_sobj), sname,
3251 CWARN("sp obj fix error: rc = %d\n", rc2);
3256 mdd_write_unlock(env, mdd_tobj);
3259 rc = mdd_changelog_ns_store(env, mdd, CL_RENAME, cl_flags,
3260 mdd_tobj, tpobj_fid, lf, spobj_fid,
3261 ltname, lsname, handle);
3264 rc = mdd_trans_stop(env, mdd, rc, handle);
3267 mdd_object_put(env, mdd_sobj);
3272 * Check whether we should migrate the file/dir
3274 * < 0 permission check failed or other error.
3275 * = 0 the file can be migrated.
3277 static int mdd_migrate_sanity_check(const struct lu_env *env,
3278 struct mdd_device *mdd,
3279 struct mdd_object *spobj,
3280 struct mdd_object *tpobj,
3281 struct mdd_object *sobj,
3282 struct mdd_object *tobj,
3283 const struct lu_attr *spattr,
3284 const struct lu_attr *tpattr,
3285 const struct lu_attr *attr)
3291 if (!mdd_object_remote(sobj)) {
3292 mdd_read_lock(env, sobj, DT_SRC_CHILD);
3293 if (sobj->mod_count > 0) {
3294 CDEBUG(D_INFO, "%s: "DFID" is opened, count %d\n",
3295 mdd2obd_dev(mdd)->obd_name, PFID(mdo2fid(sobj)),
3297 mdd_read_unlock(env, sobj);
3300 mdd_read_unlock(env, sobj);
3303 if (mdd_object_exists(tobj))
3306 rc = mdd_rename_sanity_check(env, spobj, spattr, tpobj, tpattr, sobj,
3311 typedef int (*mdd_dir_stripe_cb)(const struct lu_env *env,
3312 struct mdd_object *obj,
3313 struct mdd_object *stripe,
3314 const struct lu_buf *lmv_buf,
3315 const struct lu_buf *lmu_buf,
3317 struct thandle *handle);
3319 static int mdd_dir_declare_delete_stripe(const struct lu_env *env,
3320 struct mdd_object *obj,
3321 struct mdd_object *stripe,
3322 const struct lu_buf *lmv_buf,
3323 const struct lu_buf *lmu_buf,
3325 struct thandle *handle)
3327 struct mdd_thread_info *info = mdd_env_info(env);
3328 char *stripe_name = info->mti_name;
3329 struct lmv_user_md *lmu = lmu_buf->lb_buf;
3332 if (index < le32_to_cpu(lmu->lum_stripe_count))
3335 rc = mdo_declare_index_delete(env, stripe, dotdot, handle);
3339 snprintf(stripe_name, sizeof(info->mti_name), DFID":%d",
3340 PFID(mdd_object_fid(stripe)), index);
3342 rc = mdo_declare_index_delete(env, obj, stripe_name, handle);
3346 rc = mdo_declare_ref_del(env, obj, handle);
3351 /* delete stripe from its master object namespace */
3352 static int mdd_dir_delete_stripe(const struct lu_env *env,
3353 struct mdd_object *obj,
3354 struct mdd_object *stripe,
3355 const struct lu_buf *lmv_buf,
3356 const struct lu_buf *lmu_buf,
3358 struct thandle *handle)
3360 struct mdd_thread_info *info = mdd_env_info(env);
3361 char *stripe_name = info->mti_name;
3362 struct lmv_mds_md_v1 *lmv = lmv_buf->lb_buf;
3363 struct lmv_user_md *lmu = lmu_buf->lb_buf;
3364 __u32 del_offset = le32_to_cpu(lmu->lum_stripe_count);
3369 /* local dir will delete via LOD */
3370 LASSERT(mdd_object_remote(obj));
3371 LASSERT(del_offset < le32_to_cpu(lmv->lmv_stripe_count));
3373 if (index < del_offset)
3376 mdd_write_lock(env, stripe, DT_SRC_CHILD);
3377 rc = __mdd_index_delete_only(env, stripe, dotdot, handle);
3381 snprintf(stripe_name, sizeof(info->mti_name), DFID":%d",
3382 PFID(mdd_object_fid(stripe)), index);
3384 rc = __mdd_index_delete_only(env, obj, stripe_name, handle);
3388 rc = mdo_ref_del(env, obj, handle);
3391 mdd_write_unlock(env, stripe);
3396 static int mdd_dir_declare_destroy_stripe(const struct lu_env *env,
3397 struct mdd_object *obj,
3398 struct mdd_object *stripe,
3399 const struct lu_buf *lmv_buf,
3400 const struct lu_buf *lmu_buf,
3402 struct thandle *handle)
3404 struct lmv_user_md *lmu = lmu_buf->lb_buf;
3405 __u32 shrink_offset = le32_to_cpu(lmu->lum_stripe_count);
3408 if (index < shrink_offset) {
3409 if (shrink_offset < 2)
3411 return mdo_declare_xattr_set(env, stripe, lmv_buf,
3412 XATTR_NAME_LMV".set", 0, handle);
3415 rc = mdo_declare_ref_del(env, stripe, handle);
3419 rc = mdo_declare_destroy(env, stripe, handle);
3424 static int mdd_dir_destroy_stripe(const struct lu_env *env,
3425 struct mdd_object *obj,
3426 struct mdd_object *stripe,
3427 const struct lu_buf *lmv_buf,
3428 const struct lu_buf *lmu_buf,
3430 struct thandle *handle)
3432 struct mdd_thread_info *info = mdd_env_info(env);
3433 struct lmv_mds_md_v1 *lmv = lmv_buf->lb_buf;
3434 struct lmv_user_md *lmu = lmu_buf->lb_buf;
3435 __u32 shrink_offset = le32_to_cpu(lmu->lum_stripe_count);
3440 /* update remaining stripes' LMV */
3441 if (index < shrink_offset) {
3442 struct lmv_mds_md_v1 *slave_lmv;
3443 struct lu_buf slave_buf = {
3444 .lb_buf = &info->mti_lmv.lmv_md_v1,
3445 .lb_len = sizeof(*slave_lmv)
3447 __u32 version = le32_to_cpu(lmv->lmv_layout_version);
3449 /* if dir will be shrunk to 1-stripe, don't update */
3450 if (shrink_offset < 2)
3453 slave_lmv = slave_buf.lb_buf;
3454 memset(slave_lmv, 0, sizeof(*slave_lmv));
3455 slave_lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_STRIPE);
3456 slave_lmv->lmv_stripe_count = lmu->lum_stripe_count;
3457 slave_lmv->lmv_master_mdt_index = cpu_to_le32(index);
3458 slave_lmv->lmv_hash_type = lmv->lmv_hash_type &
3459 cpu_to_le32(LMV_HASH_TYPE_MASK);
3460 slave_lmv->lmv_layout_version = cpu_to_le32(++version);
3462 rc = mdo_xattr_set(env, stripe, &slave_buf,
3463 XATTR_NAME_LMV".set", 0, handle);
3467 mdd_write_lock(env, stripe, DT_SRC_CHILD);
3468 rc = mdo_ref_del(env, stripe, handle);
3470 rc = mdo_destroy(env, stripe, handle);
3471 mdd_write_unlock(env, stripe);
3476 static int mdd_shrink_stripe_is_empty(const struct lu_env *env,
3477 struct mdd_object *obj,
3478 struct mdd_object *stripe,
3479 const struct lu_buf *lmv_buf,
3480 const struct lu_buf *lmu_buf,
3482 struct thandle *handle)
3484 struct lmv_user_md *lmu = lmu_buf->lb_buf;
3485 __u32 shrink_offset = le32_to_cpu(lmu->lum_stripe_count);
3487 /* the default value is 0, but it means 1 */
3491 if (index < shrink_offset)
3494 return mdd_dir_is_empty(env, stripe);
3498 * iterate stripes of striped directory on remote MDT, local striped directory
3499 * is accessed via LOD.
3501 static int mdd_dir_iterate_stripes(const struct lu_env *env,
3502 struct mdd_object *obj,
3503 const struct lu_buf *lmv_buf,
3504 const struct lu_buf *lmu_buf,
3505 struct thandle *handle,
3506 mdd_dir_stripe_cb cb)
3508 struct mdd_device *mdd = mdo2mdd(&obj->mod_obj);
3509 struct lu_fid *fid = &mdd_env_info(env)->mti_fid2;
3510 struct lmv_mds_md_v1 *lmv = lmv_buf->lb_buf;
3511 struct mdd_object *stripe;
3519 for (i = 0; i < le32_to_cpu(lmv->lmv_stripe_count); i++) {
3520 fid_le_to_cpu(fid, &lmv->lmv_stripe_fids[i]);
3521 if (!fid_is_sane(fid))
3524 stripe = mdd_object_find(env, mdd, fid);
3526 RETURN(PTR_ERR(stripe));
3528 rc = cb(env, obj, stripe, lmv_buf, lmu_buf, i, handle);
3529 mdd_object_put(env, stripe);
3537 typedef int (*mdd_xattr_cb)(const struct lu_env *env,
3538 struct mdd_object *obj,
3539 const struct lu_buf *buf,
3541 int fl, struct thandle *handle);
3543 /* iterate xattrs, but ignore LMA, LMV, and LINKEA if 'skip_linkea' is set. */
3544 static int mdd_iterate_xattrs(const struct lu_env *env,
3545 struct mdd_object *sobj,
3546 struct mdd_object *tobj,
3548 struct thandle *handle,
3551 struct mdd_thread_info *info = mdd_env_info(env);
3553 struct lu_buf list_xbuf;
3554 struct lu_buf cbxbuf;
3555 struct lu_buf xbuf = { NULL };
3564 /* retrieve xattr list from the old object */
3565 list_xsize = mdo_xattr_list(env, sobj, &LU_BUF_NULL);
3566 if (list_xsize == -ENODATA)
3572 lu_buf_check_and_alloc(&info->mti_big_buf, list_xsize);
3573 if (info->mti_big_buf.lb_buf == NULL)
3576 list_xbuf.lb_buf = info->mti_big_buf.lb_buf;
3577 list_xbuf.lb_len = list_xsize;
3578 rc = mdo_xattr_list(env, sobj, &list_xbuf);
3584 xname = list_xbuf.lb_buf;
3586 xlen = strnlen(xname, rem - 1) + 1;
3587 if (strcmp(XATTR_NAME_LMA, xname) == 0 ||
3588 strcmp(XATTR_NAME_LMV, xname) == 0)
3592 strcmp(XATTR_NAME_LINK, xname) == 0)
3595 xsize = mdo_xattr_get(env, sobj, &LU_BUF_NULL, xname);
3596 if (xsize == -ENODATA)
3599 GOTO(out, rc = xsize);
3601 lu_buf_check_and_alloc(&xbuf, xsize);
3602 if (xbuf.lb_buf == NULL)
3603 GOTO(out, rc = -ENOMEM);
3605 rc = mdo_xattr_get(env, sobj, &xbuf, xname);
3612 cbxbuf.lb_len = xsize;
3614 rc = cb(env, tobj, &cbxbuf, xname, 0, handle);
3615 if (unlikely(rc == -ENOSPC &&
3616 strcmp(xname, XATTR_NAME_LINK) == 0)) {
3617 rc = linkea_overflow_shrink(
3618 (struct linkea_data *)(cbxbuf.lb_buf));
3619 if (likely(rc > 0)) {
3637 typedef int (*mdd_linkea_cb)(const struct lu_env *env,
3638 struct mdd_object *sobj,
3639 struct mdd_object *tobj,
3640 const struct lu_name *sname,
3641 const struct lu_fid *sfid,
3642 const struct lu_name *lname,
3643 const struct lu_fid *fid,
3645 struct thandle *handle);
3647 static int mdd_declare_update_link(const struct lu_env *env,
3648 struct mdd_object *sobj,
3649 struct mdd_object *tobj,
3650 const struct lu_name *tname,
3651 const struct lu_fid *tpfid,
3652 const struct lu_name *lname,
3653 const struct lu_fid *fid,
3655 struct thandle *handle)
3657 struct mdd_device *mdd = mdo2mdd(&sobj->mod_obj);
3658 struct mdd_object *pobj;
3662 if (lu_fid_eq(tpfid, fid) && tname->ln_namelen == lname->ln_namelen &&
3663 !strcmp(tname->ln_name, lname->ln_name))
3666 pobj = mdd_object_find(env, mdd, fid);
3668 return PTR_ERR(pobj);
3671 rc = mdo_declare_index_delete(env, pobj, lname->ln_name, handle);
3673 rc = mdo_declare_index_insert(env, pobj, mdo2fid(tobj),
3674 mdd_object_type(sobj),
3675 lname->ln_name, handle);
3676 mdd_object_put(env, pobj);
3680 rc = mdo_declare_ref_add(env, tobj, handle);
3684 rc = mdo_declare_ref_del(env, sobj, handle);
3688 static int mdd_update_link(const struct lu_env *env,
3689 struct mdd_object *sobj,
3690 struct mdd_object *tobj,
3691 const struct lu_name *tname,
3692 const struct lu_fid *tpfid,
3693 const struct lu_name *lname,
3694 const struct lu_fid *fid,
3696 struct thandle *handle)
3698 struct mdd_device *mdd = mdo2mdd(&sobj->mod_obj);
3699 struct mdd_object *pobj;
3704 LASSERT(lu_name_is_valid(lname));
3707 if (lu_fid_eq(tpfid, fid) && tname->ln_namelen == lname->ln_namelen &&
3708 !strncmp(tname->ln_name, lname->ln_name, lname->ln_namelen))
3711 CDEBUG(D_INFO, "update "DFID"/"DNAME":"DFID"\n",
3712 PFID(fid), PNAME(lname), PFID(mdo2fid(tobj)));
3714 pobj = mdd_object_find(env, mdd, fid);
3716 CWARN("%s: cannot find obj "DFID": %ld\n",
3717 mdd2obd_dev(mdd)->obd_name, PFID(fid), PTR_ERR(pobj));
3718 RETURN(PTR_ERR(pobj));
3721 if (!mdd_object_exists(pobj)) {
3722 CDEBUG(D_INFO, DFID" doesn't exist\n", PFID(fid));
3723 mdd_object_put(env, pobj);
3727 mdd_write_lock(env, pobj, DT_TGT_PARENT);
3728 rc = __mdd_index_delete_only(env, pobj, lname->ln_name, handle);
3730 rc = __mdd_index_insert_only(env, pobj, mdo2fid(tobj),
3731 mdd_object_type(sobj),
3732 lname->ln_name, handle);
3733 mdd_write_unlock(env, pobj);
3734 mdd_object_put(env, pobj);
3738 mdd_write_lock(env, tobj, DT_TGT_CHILD);
3739 rc = mdo_ref_add(env, tobj, handle);
3740 mdd_write_unlock(env, tobj);
3744 mdd_write_lock(env, sobj, DT_SRC_CHILD);
3745 rc = mdo_ref_del(env, sobj, handle);
3746 mdd_write_unlock(env, sobj);
3751 static inline int mdd_fld_lookup(const struct lu_env *env,
3752 struct mdd_device *mdd,
3753 const struct lu_fid *fid,
3756 struct lu_seq_range *range = &mdd_env_info(env)->mti_range;
3757 struct seq_server_site *ss;
3760 ss = mdd->mdd_md_dev.md_lu_dev.ld_site->ld_seq_site;
3762 range->lsr_flags = LU_SEQ_RANGE_MDT;
3763 rc = fld_server_lookup(env, ss->ss_server_fld, fid->f_seq, range);
3767 *mdt_index = range->lsr_index;
3772 static int mdd_is_link_on_source_mdt(const struct lu_env *env,
3773 struct mdd_object *sobj,
3774 struct mdd_object *tobj,
3775 const struct lu_name *tname,
3776 const struct lu_fid *tpfid,
3777 const struct lu_name *lname,
3778 const struct lu_fid *fid,
3780 struct thandle *handle)
3782 struct mdd_device *mdd = mdo2mdd(&sobj->mod_obj);
3783 __u32 source_mdt_index = *(__u32 *)opaque;
3784 __u32 link_mdt_index;
3790 if (lu_fid_eq(tpfid, fid) && tname->ln_namelen == lname->ln_namelen &&
3791 !strcmp(tname->ln_name, lname->ln_name))
3794 rc = mdd_fld_lookup(env, mdd, fid, &link_mdt_index);
3798 RETURN(link_mdt_index == source_mdt_index);
3801 static int mdd_iterate_linkea(const struct lu_env *env,
3802 struct mdd_object *sobj,
3803 struct mdd_object *tobj,
3804 const struct lu_name *tname,
3805 const struct lu_fid *tpfid,
3806 struct linkea_data *ldata,
3808 struct thandle *handle,
3811 struct mdd_thread_info *info = mdd_env_info(env);
3812 char *filename = info->mti_name;
3813 struct lu_name lname;
3820 for (linkea_first_entry(ldata); ldata->ld_lee && !rc;
3821 linkea_next_entry(ldata)) {
3822 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, &lname,
3825 /* Note: lname might miss \0 at the end */
3826 snprintf(filename, sizeof(info->mti_name), "%.*s",
3827 lname.ln_namelen, lname.ln_name);
3828 lname.ln_name = filename;
3830 CDEBUG(D_INFO, DFID"/"DNAME"\n", PFID(&fid), PNAME(&lname));
3832 rc = cb(env, sobj, tobj, tname, tpfid, &lname, &fid, opaque,
3840 * Prepare linkea, and check whether file needs migrate: if source still has
3841 * link on source MDT, no need to migrate, just update namespace on source and
3844 * \retval 0 do migrate
3845 * \retval 1 don't migrate
3846 * \retval -errno on failure
3848 static int migrate_linkea_prepare(const struct lu_env *env,
3849 struct mdd_device *mdd,
3850 struct mdd_object *spobj,
3851 struct mdd_object *tpobj,
3852 struct mdd_object *sobj,
3853 const struct lu_name *lname,
3854 const struct lu_attr *attr,
3855 struct linkea_data *ldata)
3857 __u32 source_mdt_index;
3862 memset(ldata, 0, sizeof(*ldata));
3863 rc = mdd_linkea_prepare(env, sobj, mdo2fid(spobj), lname,
3864 mdo2fid(tpobj), lname, 1, 0, ldata);
3869 * Then it will check if the file should be migrated. If the file has
3870 * mulitple links, we only need migrate the file if all of its entries
3871 * has been migrated to the remote MDT.
3873 if (S_ISDIR(attr->la_mode) || attr->la_nlink < 2)
3876 /* If there are still links locally, don't migrate this file */
3877 LASSERT(ldata->ld_leh != NULL);
3880 * If linkEA is overflow, it means there are some unknown name entries
3881 * under unknown parents, which will prevent the migration.
3883 if (unlikely(ldata->ld_leh->leh_overflow_time))
3886 rc = mdd_fld_lookup(env, mdd, mdo2fid(sobj), &source_mdt_index);
3890 rc = mdd_iterate_linkea(env, sobj, NULL, lname, mdo2fid(tpobj), ldata,
3891 &source_mdt_index, NULL,
3892 mdd_is_link_on_source_mdt);
3896 static int mdd_dir_declare_layout_delete(const struct lu_env *env,
3897 struct mdd_object *obj,
3898 const struct lu_buf *lmv_buf,
3899 const struct lu_buf *lmu_buf,
3900 struct thandle *handle)
3904 if (!lmv_buf->lb_buf)
3905 rc = mdo_declare_index_delete(env, obj, dotdot, handle);
3906 else if (mdd_object_remote(obj))
3907 rc = mdd_dir_iterate_stripes(env, obj, lmv_buf, lmu_buf, handle,
3908 mdd_dir_declare_delete_stripe);
3910 rc = mdo_declare_xattr_set(env, obj, lmu_buf,
3911 XATTR_NAME_LMV".del", 0, handle);
3916 static int mdd_dir_layout_delete(const struct lu_env *env,
3917 struct mdd_object *obj,
3918 const struct lu_buf *lmv_buf,
3919 const struct lu_buf *lmu_buf,
3920 struct thandle *handle)
3926 mdd_write_lock(env, obj, DT_SRC_PARENT);
3927 if (!lmv_buf->lb_buf)
3929 rc = __mdd_index_delete_only(env, obj, dotdot, handle);
3930 else if (mdd_object_remote(obj))
3931 /* striped, but remote */
3932 rc = mdd_dir_iterate_stripes(env, obj, lmv_buf, lmu_buf, handle,
3933 mdd_dir_delete_stripe);
3935 rc = mdo_xattr_set(env, obj, lmu_buf, XATTR_NAME_LMV".del", 0,
3937 mdd_write_unlock(env, obj);
3942 static int mdd_declare_migrate_create(const struct lu_env *env,
3943 struct mdd_object *tpobj,
3944 struct mdd_object *sobj,
3945 struct mdd_object *tobj,
3946 const struct lu_name *lname,
3947 struct lu_attr *attr,
3948 struct lu_buf *sbuf,
3949 struct linkea_data *ldata,
3950 struct md_op_spec *spec,
3951 struct dt_allocation_hint *hint,
3952 struct thandle *handle)
3954 struct mdd_thread_info *info = mdd_env_info(env);
3955 struct lmv_mds_md_v1 *lmv = sbuf->lb_buf;
3958 if (S_ISDIR(attr->la_mode)) {
3959 struct lu_buf lmu_buf = { NULL };
3962 struct lmv_user_md *lmu = &info->mti_lmv.lmv_user_md;
3964 lmu->lum_stripe_count = 0;
3965 lmu_buf.lb_buf = lmu;
3966 lmu_buf.lb_len = sizeof(*lmu);
3969 rc = mdd_dir_declare_layout_delete(env, sobj, sbuf, &lmu_buf,
3975 rc = mdo_declare_xattr_del(env, sobj, XATTR_NAME_LMV,
3982 rc = mdd_declare_create(env, mdo2mdd(&tpobj->mod_obj), tpobj, tobj,
3983 lname, attr, handle, spec, ldata, NULL, NULL,
3988 if (S_ISDIR(attr->la_mode) && mdd_dir_is_empty(env, sobj) != 0) {
3991 * if sobj is not striped, fake a 1-stripe LMV, which
3992 * will be used to generate a compound LMV for tobj.
3994 LASSERT(sizeof(info->mti_key) >
3995 lmv_mds_md_size(1, LMV_MAGIC_V1));
3996 lmv = (typeof(lmv))info->mti_key;
3997 memset(lmv, 0, sizeof(*lmv));
3998 lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_V1);
3999 lmv->lmv_stripe_count = cpu_to_le32(1);
4000 fid_le_to_cpu(&lmv->lmv_stripe_fids[0], mdo2fid(sobj));
4002 sbuf->lb_len = lmv_mds_md_size(1, LMV_MAGIC_V1);
4004 rc = mdo_declare_xattr_set(env, tobj, sbuf,
4005 XATTR_NAME_LMV".add", 0,
4007 sbuf->lb_buf = NULL;
4010 rc = mdo_declare_xattr_set(env, tobj, sbuf,
4011 XATTR_NAME_LMV".add", 0,
4019 * tobj mode will be used in lod_declare_xattr_set(), but it's not
4020 * createb yet, copy from sobj.
4022 tobj->mod_obj.mo_lu.lo_header->loh_attr &= ~S_IFMT;
4023 tobj->mod_obj.mo_lu.lo_header->loh_attr |=
4024 sobj->mod_obj.mo_lu.lo_header->loh_attr & S_IFMT;
4026 rc = mdd_iterate_xattrs(env, sobj, tobj, true, handle,
4027 mdo_declare_xattr_set);
4031 if (S_ISREG(attr->la_mode)) {
4032 struct lu_buf fid_buf;
4034 handle->th_complex = 1;
4036 /* target may be remote, update PFID via sobj. */
4037 fid_buf.lb_buf = (void *)mdo2fid(tobj);
4038 fid_buf.lb_len = sizeof(struct lu_fid);
4039 rc = mdo_declare_xattr_set(env, sobj, &fid_buf, XATTR_NAME_FID,
4044 rc = mdo_declare_xattr_del(env, sobj, XATTR_NAME_LOV, handle);
4049 if (!S_ISDIR(attr->la_mode)) {
4050 rc = mdd_iterate_linkea(env, sobj, tobj, lname, mdo2fid(tpobj),
4051 ldata, NULL, handle,
4052 mdd_declare_update_link);
4057 rc = mdo_declare_xattr_del(env, sobj, XATTR_NAME_LMV,
4068 * Create target, migrate xattrs and update links.
4070 * Create target according to \a spec, and then migrate xattrs, if it's
4071 * directory, migrate source stripes to target, else update fid to target
4074 * \param[in] env execution environment
4075 * \param[in] tpobj target parent object
4076 * \param[in] sobj source object
4077 * \param[in] tobj target object
4078 * \param[in] lname file name
4079 * \param[in] attr source attributes
4080 * \param[in] sbuf source LMV buf
4081 * \param[in] ldata source linkea
4082 * \param[in] spec migrate create spec
4083 * \param[in] hint target creation hint
4084 * \param[in] handle tranasction handle
4086 * \retval 0 on success
4087 * \retval -errno on failure
4089 static int mdd_migrate_create(const struct lu_env *env,
4090 struct mdd_object *tpobj,
4091 struct mdd_object *sobj,
4092 struct mdd_object *tobj,
4093 const struct lu_name *lname,
4094 struct lu_attr *attr,
4095 const struct lu_buf *sbuf,
4096 struct linkea_data *ldata,
4097 struct md_op_spec *spec,
4098 struct dt_allocation_hint *hint,
4099 struct thandle *handle)
4106 * directory will migrate sobj stripes to tobj:
4107 * 1. delete stripes from sobj.
4108 * 2. add stripes to tobj, see lod_dir_declare_layout_add().
4109 * 3. create/attach stripes for tobj, see lod_xattr_set_lmv().
4111 if (S_ISDIR(attr->la_mode)) {
4112 struct lu_buf lmu_buf = { NULL };
4115 struct mdd_thread_info *info = mdd_env_info(env);
4116 struct lmv_user_md *lmu = &info->mti_lmv.lmv_user_md;
4118 lmu->lum_stripe_count = 0;
4119 lmu_buf.lb_buf = lmu;
4120 lmu_buf.lb_len = sizeof(*lmu);
4123 rc = mdd_dir_layout_delete(env, sobj, sbuf, &lmu_buf, handle);
4128 * delete LMV so that later when destroying sobj it won't delete
4132 mdd_write_lock(env, sobj, DT_SRC_CHILD);
4133 rc = mdo_xattr_del(env, sobj, XATTR_NAME_LMV, handle);
4134 mdd_write_unlock(env, sobj);
4140 /* don't set nlink from sobj */
4141 attr->la_valid &= ~LA_NLINK;
4143 rc = mdd_create_object(env, tpobj, tobj, attr, spec, NULL, NULL, NULL,
4144 hint, handle, false);
4148 mdd_write_lock(env, tobj, DT_TGT_CHILD);
4149 rc = mdd_iterate_xattrs(env, sobj, tobj, true, handle, mdo_xattr_set);
4150 mdd_write_unlock(env, tobj);
4154 /* for regular file, update OST objects XATTR_NAME_FID */
4155 if (S_ISREG(attr->la_mode)) {
4156 struct lu_buf fid_buf;
4158 /* target may be remote, update PFID via sobj. */
4159 fid_buf.lb_buf = (void *)mdo2fid(tobj);
4160 fid_buf.lb_len = sizeof(struct lu_fid);
4161 rc = mdo_xattr_set(env, sobj, &fid_buf, XATTR_NAME_FID, 0,
4166 /* delete LOV to avoid deleting OST objs when destroying sobj */
4167 mdd_write_lock(env, sobj, DT_SRC_CHILD);
4168 rc = mdo_xattr_del(env, sobj, XATTR_NAME_LOV, handle);
4169 mdd_write_unlock(env, sobj);
4174 if (!S_ISDIR(attr->la_mode))
4175 rc = mdd_iterate_linkea(env, sobj, tobj, lname, mdo2fid(tpobj),
4176 ldata, NULL, handle, mdd_update_link);
4181 static int mdd_declare_migrate_update(const struct lu_env *env,
4182 struct mdd_object *spobj,
4183 struct mdd_object *tpobj,
4184 struct mdd_object *sobj,
4185 struct mdd_object *tobj,
4186 const struct lu_name *lname,
4187 struct lu_attr *attr,
4188 struct lu_attr *spattr,
4189 struct lu_attr *tpattr,
4190 struct linkea_data *ldata,
4194 struct thandle *handle)
4196 struct mdd_thread_info *info = mdd_env_info(env);
4197 const struct lu_fid *fid = mdo2fid(do_create ? tobj : sobj);
4198 struct lu_attr *la = &info->mti_la_for_fix;
4201 rc = mdo_declare_index_delete(env, spobj, lname->ln_name, handle);
4205 if (S_ISDIR(attr->la_mode)) {
4206 rc = mdo_declare_ref_del(env, spobj, handle);
4211 rc = mdo_declare_index_insert(env, tpobj, fid, mdd_object_type(sobj),
4212 lname->ln_name, handle);
4216 rc = mdd_declare_links_add(env, do_create ? tobj : sobj, handle, ldata);
4220 if (S_ISDIR(attr->la_mode)) {
4221 rc = mdo_declare_ref_add(env, tpobj, handle);
4226 la->la_valid = LA_CTIME | LA_MTIME;
4227 rc = mdo_declare_attr_set(env, spobj, la, handle);
4231 if (tpobj != spobj) {
4232 rc = mdo_declare_attr_set(env, tpobj, la, handle);
4237 if (do_create && do_destroy) {
4238 rc = mdo_declare_ref_del(env, sobj, handle);
4242 rc = mdo_declare_destroy(env, sobj, handle);
4251 * migrate dirent from \a spobj to \a tpobj, and destroy \a sobj
4253 static int mdd_migrate_update(const struct lu_env *env,
4254 struct mdd_object *spobj,
4255 struct mdd_object *tpobj,
4256 struct mdd_object *sobj,
4257 struct mdd_object *tobj,
4258 const struct lu_name *lname,
4259 struct lu_attr *attr,
4260 struct lu_attr *spattr,
4261 struct lu_attr *tpattr,
4262 struct linkea_data *ldata,
4266 struct thandle *handle)
4268 struct mdd_thread_info *info = mdd_env_info(env);
4269 const struct lu_fid *fid = mdo2fid(do_create ? tobj : sobj);
4270 struct lu_attr *la = &info->mti_la_for_fix;
4275 CDEBUG(D_INFO, "update %s "DFID"/"DFID" to "DFID"/"DFID"\n",
4276 lname->ln_name, PFID(mdo2fid(spobj)),
4277 PFID(mdo2fid(sobj)), PFID(mdo2fid(tpobj)),
4280 rc = __mdd_index_delete(env, spobj, lname->ln_name,
4281 S_ISDIR(attr->la_mode), handle);
4285 rc = __mdd_index_insert(env, tpobj, fid, mdd_object_type(sobj),
4286 lname->ln_name, handle);
4290 rc = mdd_links_write(env, do_create ? tobj : sobj, ldata, handle);
4294 la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime;
4295 la->la_valid = LA_CTIME | LA_MTIME;
4296 mdd_write_lock(env, spobj, DT_SRC_PARENT);
4297 rc = mdd_update_time(env, spobj, spattr, la, handle);
4298 mdd_write_unlock(env, spobj);
4302 if (tpobj != spobj) {
4303 la->la_valid = LA_CTIME | LA_MTIME;
4304 mdd_write_lock(env, tpobj, DT_TGT_PARENT);
4305 rc = mdd_update_time(env, tpobj, tpattr, la, handle);
4306 mdd_write_unlock(env, tpobj);
4312 * there are three situations we shouldn't destroy source:
4313 * 1. if source is not dir, and it happens to be located on the same MDT
4315 * 2. if source is not dir, and has link on the same MDT where source is
4317 * 3. if source is dir, and it's a normal, non-empty dir.
4319 * the first two situations equals to !do_create, and the 3rd equals to
4320 * !do_destroy, so the below condition is actually
4321 * !(!do_create || !do_destroy).
4323 * NB, if user has opened source dir before migration, he will get
4324 * -ENOENT error when close it later, because source is likely to be
4325 * remote, which can't be moved to orphan list, but except this error
4326 * message, this won't cause any inconsistency or trouble.
4328 if (do_create && do_destroy) {
4329 mdd_write_lock(env, sobj, DT_SRC_CHILD);
4330 mdo_ref_del(env, sobj, handle);
4331 rc = mdo_destroy(env, sobj, handle);
4332 mdd_write_unlock(env, sobj);
4339 * Migrate directory or file.
4341 * migrate source to target in following steps:
4342 * 1. create target, append source stripes after target's if it's directory,
4343 * migrate xattrs and update fid of source links.
4344 * 2. update namespace: migrate dirent from source parent to target parent,
4345 * update file linkea, and destroy source if it's not needed any more.
4347 * \param[in] env execution environment
4348 * \param[in] md_pobj parent master object
4349 * \param[in] md_sobj source object
4350 * \param[in] lname file name
4351 * \param[in] md_tobj target object
4352 * \param[in] spec target creation spec
4353 * \param[in] ma used to update \a pobj mtime and ctime
4355 * \retval 0 on success
4356 * \retval -errno on failure
4358 static int mdd_migrate(const struct lu_env *env, struct md_object *md_pobj,
4359 struct md_object *md_sobj, const struct lu_name *lname,
4360 struct md_object *md_tobj, struct md_op_spec *spec,
4363 struct mdd_device *mdd = mdo2mdd(md_pobj);
4364 struct mdd_thread_info *info = mdd_env_info(env);
4365 struct mdd_object *pobj = md2mdd_obj(md_pobj);
4366 struct mdd_object *sobj = md2mdd_obj(md_sobj);
4367 struct mdd_object *tobj = md2mdd_obj(md_tobj);
4368 struct mdd_object *spobj = NULL;
4369 struct mdd_object *tpobj = NULL;
4370 struct lu_attr *spattr = &info->mti_pattr;
4371 struct lu_attr *tpattr = &info->mti_tpattr;
4372 struct lu_attr *attr = &info->mti_cattr;
4373 struct linkea_data *ldata = &info->mti_link_data;
4374 struct dt_allocation_hint *hint = &info->mti_hint;
4375 struct lu_fid *fid = &info->mti_fid2;
4376 struct lu_buf pbuf = { NULL };
4377 struct lu_buf sbuf = { NULL };
4378 struct lmv_mds_md_v1 *plmv;
4379 struct thandle *handle;
4380 bool do_create = true;
4381 bool do_destroy = true;
4385 rc = mdd_la_get(env, sobj, attr);
4389 /* locate source and target stripe on pobj, which are the real parent */
4390 rc = mdd_stripe_get(env, pobj, &pbuf, XATTR_NAME_LMV);
4391 if (rc < 0 && rc != -ENODATA)
4396 __u32 hash_type = le32_to_cpu(plmv->lmv_hash_type);
4397 __u32 count = le32_to_cpu(plmv->lmv_stripe_count);
4400 /* locate target parent stripe */
4401 if (hash_type & LMV_HASH_FLAG_MIGRATION) {
4403 * fail check here to make sure top dir migration
4406 if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MIGRATE_ENTRIES, 0))
4407 GOTO(out, rc = -EIO);
4408 hash_type &= ~LMV_HASH_FLAG_MIGRATION;
4409 count = le32_to_cpu(plmv->lmv_migrate_offset);
4411 index = lmv_name_to_stripe_index(hash_type, count,
4415 GOTO(out, rc = index);
4417 fid_le_to_cpu(fid, &plmv->lmv_stripe_fids[index]);
4418 tpobj = mdd_object_find(env, mdd, fid);
4420 GOTO(out, rc = PTR_ERR(tpobj));
4422 /* locate source parent stripe */
4423 if (le32_to_cpu(plmv->lmv_hash_type) &
4424 LMV_HASH_FLAG_MIGRATION) {
4425 hash_type = le32_to_cpu(plmv->lmv_migrate_hash);
4426 count = le32_to_cpu(plmv->lmv_stripe_count) -
4427 le32_to_cpu(plmv->lmv_migrate_offset);
4429 index = lmv_name_to_stripe_index(hash_type, count,
4433 mdd_object_put(env, tpobj);
4434 GOTO(out, rc = index);
4437 index += le32_to_cpu(plmv->lmv_migrate_offset);
4438 fid_le_to_cpu(fid, &plmv->lmv_stripe_fids[index]);
4439 spobj = mdd_object_find(env, mdd, fid);
4440 if (IS_ERR(spobj)) {
4441 mdd_object_put(env, tpobj);
4442 GOTO(out, rc = PTR_ERR(spobj));
4446 mdd_object_get(spobj);
4451 mdd_object_get(tpobj);
4452 mdd_object_get(spobj);
4455 rc = mdd_la_get(env, spobj, spattr);
4459 rc = mdd_la_get(env, tpobj, tpattr);
4463 if (S_ISDIR(attr->la_mode)) {
4464 struct lmv_user_md_v1 *lmu = spec->u.sp_ea.eadata;
4469 * if user use default value '0' for stripe_count, we need to
4470 * adjust it to '1' to create a 1-stripe directory.
4472 if (lmu->lum_stripe_count == 0) {
4473 /* eadata is from request, don't alter it */
4474 info->mti_lmu = *lmu;
4475 info->mti_lmu.lum_stripe_count = cpu_to_le32(1);
4476 spec->u.sp_ea.eadata = &info->mti_lmu;
4477 lmu = spec->u.sp_ea.eadata;
4480 rc = mdd_stripe_get(env, sobj, &sbuf, XATTR_NAME_LMV);
4481 if (rc == -ENODATA) {
4482 if (mdd_dir_is_empty(env, sobj) == 0) {
4484 * if sobj is empty, and target is not striped,
4485 * create target as a normal directory.
4487 if (le32_to_cpu(lmu->lum_stripe_count) == 1) {
4488 info->mti_lmu = *lmu;
4489 info->mti_lmu.lum_stripe_count = 0;
4490 spec->u.sp_ea.eadata = &info->mti_lmu;
4491 lmu = spec->u.sp_ea.eadata;
4495 * sobj is not striped dir, if it's not empty,
4496 * it will be migrated to be a stripe of target,
4497 * don't destroy it after migration.
4504 struct lmv_mds_md_v1 *lmv = sbuf.lb_buf;
4506 if (le32_to_cpu(lmv->lmv_hash_type) &
4507 LMV_HASH_FLAG_MIGRATION) {
4508 __u32 lum_stripe_count = lmu->lum_stripe_count;
4509 __u32 lmv_hash_type = lmv->lmv_hash_type &
4510 cpu_to_le32(LMV_HASH_TYPE_MASK);
4512 if (!lum_stripe_count)
4513 lum_stripe_count = cpu_to_le32(1);
4515 /* TODO: check specific MDTs */
4516 if (lmv->lmv_migrate_offset !=
4518 lmv->lmv_master_mdt_index !=
4519 lmu->lum_stripe_offset ||
4520 (lmv_hash_type != 0 &&
4521 lmv_hash_type != lmu->lum_hash_type)) {
4522 CERROR("%s: \'"DNAME"\' migration was "
4523 "interrupted, run \'lfs migrate "
4524 "-m %d -c %d -H %d "DNAME"\' to "
4525 "finish migration.\n",
4526 mdd2obd_dev(mdd)->obd_name,
4529 lmv->lmv_master_mdt_index),
4531 lmv->lmv_migrate_offset),
4532 le32_to_cpu(lmv_hash_type),
4534 GOTO(out, rc = -EPERM);
4536 GOTO(out, rc = -EALREADY);
4539 } else if (!mdd_object_remote(tpobj)) {
4541 * if source is already on MDT where target parent is located,
4542 * no need to create, just update namespace.
4545 } else if (S_ISLNK(attr->la_mode)) {
4546 lu_buf_check_and_alloc(&sbuf, attr->la_size + 1);
4548 GOTO(out, rc = -ENOMEM);
4549 rc = mdd_readlink(env, &sobj->mod_obj, &sbuf);
4552 CERROR("%s: "DFID" readlink failed: rc = %d\n",
4553 mdd2obd_dev(mdd)->obd_name,
4554 PFID(mdo2fid(sobj)), rc);
4557 spec->u.sp_symname = sbuf.lb_buf;
4558 } else if (S_ISREG(attr->la_mode)) {
4559 spec->sp_cr_flags |= MDS_OPEN_DELAY_CREATE;
4560 spec->sp_cr_flags &= ~MDS_OPEN_HAS_EA;
4564 * if sobj has link on the same MDT, no need to create, just update
4565 * namespace, and it will be a remote file on target parent, which is
4566 * similar to rename.
4568 rc = migrate_linkea_prepare(env, mdd, spobj, tpobj, sobj, lname, attr,
4575 rc = mdd_migrate_sanity_check(env, mdd, spobj, tpobj, sobj, tobj,
4576 spattr, tpattr, attr);
4580 mdd_object_make_hint(env, tpobj, tobj, attr, spec, hint);
4582 handle = mdd_trans_create(env, mdd);
4584 GOTO(out, rc = PTR_ERR(handle));
4587 rc = mdd_declare_migrate_create(env, tpobj, sobj, tobj, lname,
4588 attr, &sbuf, ldata, spec, hint,
4591 GOTO(stop_trans, rc);
4594 rc = mdd_declare_migrate_update(env, spobj, tpobj, sobj, tobj, lname,
4595 attr, spattr, tpattr, ldata, do_create,
4596 do_destroy, ma, handle);
4598 GOTO(stop_trans, rc);
4600 rc = mdd_declare_changelog_store(env, mdd, CL_MIGRATE, lname, NULL,
4603 GOTO(stop_trans, rc);
4605 rc = mdd_trans_start(env, mdd, handle);
4607 GOTO(stop_trans, rc);
4610 rc = mdd_migrate_create(env, tpobj, sobj, tobj, lname, attr,
4611 &sbuf, ldata, spec, hint, handle);
4613 GOTO(stop_trans, rc);
4616 rc = mdd_migrate_update(env, spobj, tpobj, sobj, tobj, lname, attr,
4617 spattr, tpattr, ldata, do_create, do_destroy,
4620 GOTO(stop_trans, rc);
4622 rc = mdd_changelog_ns_store(env, mdd, CL_MIGRATE, 0, tobj,
4623 mdo2fid(spobj), mdo2fid(sobj),
4624 mdo2fid(tpobj), lname, lname, handle);
4626 GOTO(stop_trans, rc);
4630 rc = mdd_trans_stop(env, mdd, rc, handle);
4632 if (spobj && !IS_ERR(spobj))
4633 mdd_object_put(env, spobj);
4634 if (tpobj && !IS_ERR(tpobj))
4635 mdd_object_put(env, tpobj);
4641 static int __mdd_dir_declare_layout_shrink(const struct lu_env *env,
4642 struct mdd_object *pobj,
4643 struct mdd_object *obj,
4644 struct mdd_object *stripe,
4645 struct lu_attr *attr,
4646 struct lu_buf *lmv_buf,
4647 const struct lu_buf *lmu_buf,
4648 struct lu_name *lname,
4649 struct thandle *handle)
4651 struct mdd_thread_info *info = mdd_env_info(env);
4652 struct lmv_mds_md_v1 *lmv = lmv_buf->lb_buf;
4653 struct lmv_user_md *lmu = (typeof(lmu))info->mti_key;
4654 struct lu_buf shrink_buf = { .lb_buf = lmu,
4655 .lb_len = sizeof(*lmu) };
4660 memcpy(lmu, lmu_buf->lb_buf, sizeof(*lmu));
4662 if (le32_to_cpu(lmu->lum_stripe_count) < 2)
4663 lmu->lum_stripe_count = 0;
4665 rc = mdd_dir_declare_layout_delete(env, obj, lmv_buf, &shrink_buf,
4670 if (lmu->lum_stripe_count == 0) {
4671 lmu->lum_stripe_count = cpu_to_le32(1);
4673 rc = mdo_declare_xattr_del(env, obj, XATTR_NAME_LMV, handle);
4678 rc = mdd_dir_iterate_stripes(env, obj, lmv_buf, &shrink_buf, handle,
4679 mdd_dir_declare_destroy_stripe);
4683 if (le32_to_cpu(lmu->lum_stripe_count) > 1)
4684 return mdo_declare_xattr_set(env, obj, lmv_buf,
4685 XATTR_NAME_LMV".set", 0, handle);
4687 rc = mdo_declare_index_insert(env, stripe, mdo2fid(pobj), S_IFDIR,
4692 rc = mdd_iterate_xattrs(env, obj, stripe, false, handle,
4693 mdo_declare_xattr_set);
4697 rc = mdo_declare_xattr_del(env, stripe, XATTR_NAME_LMV, handle);
4701 rc = mdo_declare_attr_set(env, stripe, attr, handle);
4705 rc = mdo_declare_index_delete(env, pobj, lname->ln_name, handle);
4709 rc = mdo_declare_index_insert(env, pobj, mdo2fid(stripe), attr->la_mode,
4710 lname->ln_name, handle);
4714 rc = mdo_declare_ref_del(env, obj, handle);
4718 rc = mdo_declare_ref_del(env, obj, handle);
4722 rc = mdo_declare_destroy(env, obj, handle);
4731 * after files under \a obj were migrated, shrink old stripes from \a obj,
4732 * furthermore, if it becomes a 1-stripe directory, convert it to a normal one.
4734 static int __mdd_dir_layout_shrink(const struct lu_env *env,
4735 struct mdd_object *pobj,
4736 struct mdd_object *obj,
4737 struct mdd_object *stripe,
4738 struct lu_attr *attr,
4739 struct lu_buf *lmv_buf,
4740 const struct lu_buf *lmu_buf,
4741 struct lu_name *lname,
4742 struct thandle *handle)
4744 struct mdd_thread_info *info = mdd_env_info(env);
4745 struct lmv_mds_md_v1 *lmv = lmv_buf->lb_buf;
4746 struct lmv_user_md *lmu = (typeof(lmu))info->mti_key;
4747 struct lu_buf shrink_buf = { .lb_buf = lmu,
4748 .lb_len = sizeof(*lmu) };
4749 int len = lmv_buf->lb_len;
4750 __u32 version = le32_to_cpu(lmv->lmv_layout_version);
4755 /* lmu needs to be altered, but lmu_buf is const */
4756 memcpy(lmu, lmu_buf->lb_buf, sizeof(*lmu));
4759 * if dir will be shrunk to 1-stripe, delete all stripes, because it
4760 * will be converted to normal dir.
4762 if (le32_to_cpu(lmu->lum_stripe_count) == 1)
4763 lmu->lum_stripe_count = 0;
4765 /* delete stripes after lmu_stripe_count */
4766 rc = mdd_dir_layout_delete(env, obj, lmv_buf, &shrink_buf, handle);
4770 if (lmu->lum_stripe_count == 0) {
4771 lmu->lum_stripe_count = cpu_to_le32(1);
4773 /* delete LMV to avoid deleting stripes again upon destroy */
4774 mdd_write_lock(env, obj, DT_SRC_CHILD);
4775 rc = mdo_xattr_del(env, obj, XATTR_NAME_LMV, handle);
4776 mdd_write_unlock(env, obj);
4781 /* destroy stripes after lmu_stripe_count */
4782 mdd_write_lock(env, obj, DT_SRC_PARENT);
4783 rc = mdd_dir_iterate_stripes(env, obj, lmv_buf, &shrink_buf, handle,
4784 mdd_dir_destroy_stripe);
4785 mdd_write_unlock(env, obj);
4787 if (le32_to_cpu(lmu->lum_stripe_count) > 1) {
4788 /* update dir LMV, that's all if it's still striped. */
4789 lmv->lmv_stripe_count = lmu->lum_stripe_count;
4790 lmv->lmv_hash_type &= ~cpu_to_le32(LMV_HASH_FLAG_MIGRATION);
4791 lmv->lmv_migrate_offset = 0;
4792 lmv->lmv_migrate_hash = 0;
4793 lmv->lmv_layout_version = cpu_to_le32(++version);
4795 lmv_buf->lb_len = sizeof(*lmv);
4796 rc = mdo_xattr_set(env, obj, lmv_buf, XATTR_NAME_LMV".set", 0,
4798 lmv_buf->lb_len = len;
4802 /* replace directory with its remaining stripe */
4806 mdd_write_lock(env, pobj, DT_SRC_PARENT);
4807 mdd_write_lock(env, obj, DT_SRC_CHILD);
4809 /* insert dotdot to stripe which points to parent */
4810 rc = __mdd_index_insert_only(env, stripe, mdo2fid(pobj), S_IFDIR,
4815 /* copy xattrs including linkea */
4816 rc = mdd_iterate_xattrs(env, obj, stripe, false, handle, mdo_xattr_set);
4821 rc = mdo_xattr_del(env, stripe, XATTR_NAME_LMV, handle);
4825 /* don't set nlink from parent */
4826 attr->la_valid &= ~LA_NLINK;
4828 rc = mdo_attr_set(env, stripe, attr, handle);
4832 /* delete dir name from parent */
4833 rc = __mdd_index_delete_only(env, pobj, lname->ln_name, handle);
4837 /* insert stripe to parent with dir name */
4838 rc = __mdd_index_insert_only(env, pobj, mdo2fid(stripe), attr->la_mode,
4839 lname->ln_name, handle);
4843 /* destroy dir obj */
4844 rc = mdo_ref_del(env, obj, handle);
4848 rc = mdo_ref_del(env, obj, handle);
4852 rc = mdo_destroy(env, obj, handle);
4858 mdd_write_unlock(env, obj);
4859 mdd_write_unlock(env, pobj);
4865 * shrink directory stripes to lum_stripe_count specified by lum_mds_md.
4867 int mdd_dir_layout_shrink(const struct lu_env *env,
4868 struct md_object *md_obj,
4869 const struct lu_buf *lmu_buf)
4871 struct mdd_device *mdd = mdo2mdd(md_obj);
4872 struct mdd_thread_info *info = mdd_env_info(env);
4873 struct mdd_object *obj = md2mdd_obj(md_obj);
4874 struct mdd_object *pobj = NULL;
4875 struct mdd_object *stripe = NULL;
4876 struct lu_attr *attr = &info->mti_pattr;
4877 struct lu_fid *fid = &info->mti_fid2;
4878 struct lu_name lname = { NULL };
4879 struct lu_buf lmv_buf = { NULL };
4880 struct lmv_mds_md_v1 *lmv;
4881 struct lmv_user_md *lmu;
4882 struct thandle *handle;
4887 rc = mdd_la_get(env, obj, attr);
4891 if (!S_ISDIR(attr->la_mode))
4894 rc = mdd_stripe_get(env, obj, &lmv_buf, XATTR_NAME_LMV);
4898 lmv = lmv_buf.lb_buf;
4899 lmu = lmu_buf->lb_buf;
4901 /* this was checked in MDT */
4902 LASSERT(le32_to_cpu(lmu->lum_stripe_count) <
4903 le32_to_cpu(lmv->lmv_stripe_count));
4905 rc = mdd_dir_iterate_stripes(env, obj, &lmv_buf, lmu_buf, NULL,
4906 mdd_shrink_stripe_is_empty);
4910 GOTO(out, rc = -ENOTEMPTY);
4913 * if obj stripe count will be shrunk to 1, we need to convert it to a
4914 * normal dir, which will change its fid and update parent namespace,
4915 * get obj name and parent fid from linkea.
4917 if (le32_to_cpu(lmu->lum_stripe_count) < 2) {
4918 struct linkea_data *ldata = &info->mti_link_data;
4919 char *filename = info->mti_name;
4921 rc = mdd_links_read(env, obj, ldata);
4925 if (ldata->ld_leh->leh_reccount > 1)
4926 GOTO(out, rc = -EINVAL);
4928 linkea_first_entry(ldata);
4930 GOTO(out, rc = -ENODATA);
4932 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, &lname,
4935 /* Note: lname might miss \0 at the end */
4936 snprintf(filename, sizeof(info->mti_name), "%.*s",
4937 lname.ln_namelen, lname.ln_name);
4938 lname.ln_name = filename;
4940 pobj = mdd_object_find(env, mdd, fid);
4947 fid_le_to_cpu(fid, &lmv->lmv_stripe_fids[0]);
4949 stripe = mdd_object_find(env, mdd, fid);
4950 if (IS_ERR(stripe)) {
4951 mdd_object_put(env, pobj);
4953 GOTO(out, rc = PTR_ERR(stripe));
4957 handle = mdd_trans_create(env, mdd);
4959 GOTO(out, rc = PTR_ERR(handle));
4961 rc = __mdd_dir_declare_layout_shrink(env, pobj, obj, stripe, attr,
4962 &lmv_buf, lmu_buf, &lname, handle);
4964 GOTO(stop_trans, rc);
4966 rc = mdd_declare_changelog_store(env, mdd, CL_LAYOUT, NULL, NULL,
4969 GOTO(stop_trans, rc);
4971 rc = mdd_trans_start(env, mdd, handle);
4973 GOTO(stop_trans, rc);
4975 rc = __mdd_dir_layout_shrink(env, pobj, obj, stripe, attr, &lmv_buf,
4976 lmu_buf, &lname, handle);
4978 GOTO(stop_trans, rc);
4980 rc = mdd_changelog_data_store_xattr(env, mdd, CL_LAYOUT, 0, obj,
4981 XATTR_NAME_LMV, handle);
4982 GOTO(stop_trans, rc);
4985 rc = mdd_trans_stop(env, mdd, rc, handle);
4988 mdd_object_put(env, stripe);
4989 mdd_object_put(env, pobj);
4991 lu_buf_free(&lmv_buf);
4995 const struct md_dir_operations mdd_dir_ops = {
4996 .mdo_is_subdir = mdd_is_subdir,
4997 .mdo_lookup = mdd_lookup,
4998 .mdo_create = mdd_create,
4999 .mdo_rename = mdd_rename,
5000 .mdo_link = mdd_link,
5001 .mdo_unlink = mdd_unlink,
5002 .mdo_create_data = mdd_create_data,
5003 .mdo_migrate = mdd_migrate,