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27 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
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35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * lustre/osd-zfs/osd_oi.c
39 * OI functions to map fid to dnode
41 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
42 * Author: Mike Pershin <tappro@whamcloud.com>
43 * Author: Di Wang <di.wang@intel.com>
46 #define DEBUG_SUBSYSTEM S_OSD
48 #include <lustre_ver.h>
49 #include <libcfs/libcfs.h>
50 #include <obd_support.h>
51 #include <lustre_net.h>
53 #include <obd_class.h>
54 #include <lustre_disk.h>
55 #include <lustre_fid.h>
57 #include "osd_internal.h"
59 #include <sys/dnode.h>
64 #include <sys/spa_impl.h>
65 #include <sys/zfs_znode.h>
66 #include <sys/dmu_tx.h>
67 #include <sys/dmu_objset.h>
68 #include <sys/dsl_prop.h>
69 #include <sys/sa_impl.h>
72 static char *oi_tag = "osd_mount, oi";
74 #define OSD_OI_FID_NR (1UL << 7)
75 #define OSD_OI_FID_NR_MAX (1UL << OSD_OI_FID_OID_BITS_MAX)
76 unsigned int osd_oi_count = OSD_OI_FID_NR;
80 * zfs osd maintains names for known fids in the name hierarchy
81 * so that one can mount filesystem with regular ZFS stack and
89 static const struct named_oid oids[] = {
90 { LAST_RECV_OID, LAST_RCVD },
91 { OFD_LAST_GROUP_OID, "LAST_GROUP" },
92 { LLOG_CATALOGS_OID, "CATALOGS" },
93 { MGS_CONFIGS_OID, NULL /*MOUNT_CONFIGS_DIR*/ },
94 { FID_SEQ_SRV_OID, "seq_srv" },
95 { FID_SEQ_CTL_OID, "seq_ctl" },
96 { FLD_INDEX_OID, "fld" },
97 { MDD_LOV_OBJ_OID, LOV_OBJID },
98 { OFD_HEALTH_CHECK_OID, HEALTH_CHECK },
99 { ACCT_USER_OID, "acct_usr_inode" },
100 { ACCT_GROUP_OID, "acct_grp_inode" },
104 static char *oid2name(const unsigned long oid)
108 while (oids[i].oid) {
109 if (oids[i].oid == oid)
117 * Lookup an existing OI by the given name.
120 osd_oi_lookup(const struct lu_env *env, struct osd_device *o,
121 uint64_t parent, const char *name, struct osd_oi *oi)
123 struct zpl_direntry *zde = &osd_oti_get(env)->oti_zde.lzd_reg;
126 rc = -zap_lookup(o->od_objset.os, parent, name, 8, 1, (void *)zde);
130 strncpy(oi->oi_name, name, OSD_OI_NAME_SIZE - 1);
131 oi->oi_zapid = zde->zde_dnode;
137 * Create a new OI with the given name.
140 osd_oi_create(const struct lu_env *env, struct osd_device *o,
141 uint64_t parent, const char *name, uint64_t *child)
143 struct zpl_direntry *zde = &osd_oti_get(env)->oti_zde.lzd_reg;
144 struct lu_attr *la = &osd_oti_get(env)->oti_la;
149 /* verify it doesn't already exist */
150 rc = -zap_lookup(o->od_objset.os, parent, name, 8, 1, (void *)zde);
154 /* create fid-to-dnode index */
155 tx = dmu_tx_create(o->od_objset.os);
159 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, 1, NULL);
160 dmu_tx_hold_bonus(tx, parent);
161 dmu_tx_hold_zap(tx, parent, TRUE, name);
162 LASSERT(tx->tx_objset->os_sa);
163 dmu_tx_hold_sa_create(tx, ZFS_SA_BASE_ATTR_SIZE);
165 rc = -dmu_tx_assign(tx, TXG_WAIT);
171 la->la_valid = LA_MODE | LA_UID | LA_GID;
172 la->la_mode = S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO;
173 la->la_uid = la->la_gid = 0;
174 __osd_zap_create(env, &o->od_objset, &db, tx, la, parent, oi_tag, 0);
176 zde->zde_dnode = db->db_object;
178 zde->zde_type = IFTODT(S_IFDIR);
180 rc = -zap_add(o->od_objset.os, parent, name, 8, 1, (void *)zde, tx);
184 *child = db->db_object;
185 sa_buf_rele(db, oi_tag);
191 osd_oi_find_or_create(const struct lu_env *env, struct osd_device *o,
192 uint64_t parent, const char *name, uint64_t *child)
197 rc = osd_oi_lookup(env, o, parent, name, &oi);
199 *child = oi.oi_zapid;
200 else if (rc == -ENOENT)
201 rc = osd_oi_create(env, o, parent, name, child);
207 * Lookup the target index/flags of the fid, so it will know where
208 * the object is located (tgt index) and it is MDT or OST object.
210 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
211 obd_seq seq, struct lu_seq_range *range)
213 struct seq_server_site *ss = osd_seq_site(osd);
215 if (fid_seq_is_idif(seq)) {
216 fld_range_set_ost(range);
217 range->lsr_index = idif_ost_idx(seq);
221 if (!fid_seq_in_fldb(seq)) {
222 fld_range_set_mdt(range);
224 /* FIXME: If ss is NULL, it suppose not get lsr_index
226 range->lsr_index = ss->ss_node_id;
231 fld_range_set_any(range);
232 /* OSD will only do local fld lookup */
233 return fld_local_lookup(env, ss->ss_server_fld, seq, range);
236 int fid_is_on_ost(const struct lu_env *env, struct osd_device *osd,
237 const struct lu_fid *fid)
239 struct lu_seq_range *range = &osd_oti_get(env)->oti_seq_range;
243 if (fid_is_idif(fid))
246 if (unlikely(fid_is_local_file(fid) || fid_is_llog(fid)) ||
247 fid_is_name_llog(fid) || fid_is_quota(fid))
250 rc = osd_fld_lookup(env, osd, fid_seq(fid), range);
253 CERROR("%s: "DFID" lookup failed: rc = %d\n",
254 osd_name(osd), PFID(fid), rc);
258 if (fld_range_is_ost(range))
264 static struct osd_seq *osd_seq_find_locked(struct osd_seq_list *seq_list,
267 struct osd_seq *osd_seq;
269 cfs_list_for_each_entry(osd_seq, &seq_list->osl_seq_list, os_seq_list) {
270 if (osd_seq->os_seq == seq)
276 static struct osd_seq *osd_seq_find(struct osd_seq_list *seq_list,
279 struct osd_seq *osd_seq;
281 read_lock(&seq_list->osl_seq_list_lock);
282 osd_seq = osd_seq_find_locked(seq_list, seq);
283 read_unlock(&seq_list->osl_seq_list_lock);
288 static struct osd_seq *osd_find_or_add_seq(const struct lu_env *env,
289 struct osd_device *osd, obd_seq seq)
291 struct osd_seq_list *seq_list = &osd->od_seq_list;
292 struct osd_seq *osd_seq;
293 char *key = osd_oti_get(env)->oti_buf;
294 char *seq_name = osd_oti_get(env)->oti_str;
301 osd_seq = osd_seq_find(seq_list, seq);
305 down(&seq_list->osl_seq_init_sem);
306 /* Check again, in case some one else already add it
308 osd_seq = osd_seq_find(seq_list, seq);
312 OBD_ALLOC_PTR(osd_seq);
314 GOTO(out, rc = -ENOMEM);
316 CFS_INIT_LIST_HEAD(&osd_seq->os_seq_list);
317 osd_seq->os_seq = seq;
319 /* Init subdir count to be 32, but each seq can have
320 * different subdir count */
321 osd_seq->os_subdir_count = OSD_OST_MAP_SIZE;
322 OBD_ALLOC(osd_seq->os_compat_dirs,
323 sizeof(uint64_t) * osd_seq->os_subdir_count);
324 if (osd_seq->os_compat_dirs == NULL)
325 GOTO(out, rc = -ENOMEM);
327 oi.oi_zapid = osd->od_O_id;
328 sprintf(seq_name, (fid_seq_is_rsvd(seq) ||
329 fid_seq_is_mdt0(seq)) ? LPU64 : LPX64i,
330 fid_seq_is_idif(seq) ? 0 : seq);
332 rc = osd_oi_find_or_create(env, osd, oi.oi_zapid, seq_name, &odb);
334 CERROR("%s: Can not create %s : rc = %d\n",
335 osd_name(osd), seq_name, rc);
339 for (i = 0; i < OSD_OST_MAP_SIZE; i++) {
340 sprintf(key, "d%d", i);
341 rc = osd_oi_find_or_create(env, osd, odb, key, &sdb);
344 osd_seq->os_compat_dirs[i] = sdb;
347 write_lock(&seq_list->osl_seq_list_lock);
348 cfs_list_add(&osd_seq->os_seq_list, &seq_list->osl_seq_list);
349 write_unlock(&seq_list->osl_seq_list_lock);
351 up(&seq_list->osl_seq_init_sem);
353 if (osd_seq != NULL && osd_seq->os_compat_dirs != NULL)
354 OBD_FREE(osd_seq->os_compat_dirs,
355 sizeof(uint64_t) * osd_seq->os_subdir_count);
357 OBD_FREE_PTR(osd_seq);
358 osd_seq = ERR_PTR(rc);
364 * objects w/o a natural reference (unlike a file on a MDS)
365 * are put under a special hierarchy /O/<seq>/d0..dXX
366 * this function returns a directory specific fid belongs to
369 osd_get_idx_for_ost_obj(const struct lu_env *env, struct osd_device *osd,
370 const struct lu_fid *fid, char *buf)
372 struct osd_seq *osd_seq;
376 osd_seq = osd_find_or_add_seq(env, osd, fid_seq(fid));
377 if (IS_ERR(osd_seq)) {
378 CERROR("%s: Can not find seq group "DFID"\n", osd_name(osd),
380 return PTR_ERR(osd_seq);
383 rc = fid_to_ostid(fid, &osd_oti_get(env)->oti_ostid);
384 LASSERT(rc == 0); /* we should not get here with IGIF */
385 b = ostid_id(&osd_oti_get(env)->oti_ostid) % OSD_OST_MAP_SIZE;
386 LASSERT(osd_seq->os_compat_dirs[b]);
388 sprintf(buf, LPU64, ostid_id(&osd_oti_get(env)->oti_ostid));
390 return osd_seq->os_compat_dirs[b];
393 /* XXX: f_ver is not counted, but may differ too */
394 static void osd_fid2str(char *buf, const struct lu_fid *fid)
396 sprintf(buf, DFID_NOBRACE, PFID(fid));
400 * Determine the zap object id which is being used as the OI for the
401 * given fid. The lowest N bits in the sequence ID are used as the
402 * index key. On failure 0 is returned which zfs treats internally
403 * as an invalid object id.
406 osd_get_idx_for_fid(struct osd_device *osd, const struct lu_fid *fid,
411 LASSERT(osd->od_oi_table != NULL);
412 oi = osd->od_oi_table[fid_seq(fid) & (osd->od_oi_count - 1)];
413 osd_fid2str(buf, fid);
418 uint64_t osd_get_name_n_idx(const struct lu_env *env, struct osd_device *osd,
419 const struct lu_fid *fid, char *buf)
426 if (fid_is_on_ost(env, osd, fid) == 1 || fid_seq(fid) == FID_SEQ_ECHO) {
427 zapid = osd_get_idx_for_ost_obj(env, osd, fid, buf);
428 } else if (unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE)) {
429 /* special objects with fixed known fids get their name */
430 char *name = oid2name(fid_oid(fid));
433 zapid = osd->od_root;
435 if (fid_is_acct(fid))
436 zapid = MASTER_NODE_OBJ;
438 zapid = osd_get_idx_for_fid(osd, fid, buf);
441 zapid = osd_get_idx_for_fid(osd, fid, buf);
447 static inline int fid_is_fs_root(const struct lu_fid *fid)
449 /* Map root inode to special local object FID */
450 return fid_seq(fid) == FID_SEQ_LOCAL_FILE &&
451 fid_oid(fid) == OSD_FS_ROOT_OID;
454 int osd_fid_lookup(const struct lu_env *env, struct osd_device *dev,
455 const struct lu_fid *fid, uint64_t *oid)
457 struct osd_thread_info *info = osd_oti_get(env);
458 char *buf = info->oti_buf;
463 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
466 if (unlikely(fid_is_acct(fid))) {
467 if (fid_oid(fid) == ACCT_USER_OID)
468 *oid = dev->od_iusr_oid;
470 *oid = dev->od_igrp_oid;
471 } else if (unlikely(fid_is_fs_root(fid))) {
474 zapid = osd_get_name_n_idx(env, dev, fid, buf);
476 rc = -zap_lookup(dev->od_objset.os, zapid, buf,
477 8, 1, &info->oti_zde);
480 *oid = info->oti_zde.lzd_reg.zde_dnode;
487 * Close an entry in a specific slot.
490 osd_oi_remove_table(const struct lu_env *env, struct osd_device *o, int key)
494 LASSERT(key < o->od_oi_count);
496 oi = o->od_oi_table[key];
499 o->od_oi_table[key] = NULL;
504 * Allocate and open a new entry in the specified unused slot.
507 osd_oi_add_table(const struct lu_env *env, struct osd_device *o,
513 LASSERT(key < o->od_oi_count);
514 LASSERT(o->od_oi_table[key] == NULL);
520 rc = osd_oi_lookup(env, o, o->od_root, name, oi);
526 o->od_oi_table[key] = oi;
532 * Depopulate the OI table.
535 osd_oi_close_table(const struct lu_env *env, struct osd_device *o)
539 for (i = 0; i < o->od_oi_count; i++)
540 osd_oi_remove_table(env, o, i);
544 * Populate the OI table based.
547 osd_oi_open_table(const struct lu_env *env, struct osd_device *o, int count)
553 for (i = 0; i < count; i++) {
554 sprintf(name, "%s.%d", DMU_OSD_OI_NAME_BASE, i);
555 rc = osd_oi_add_table(env, o, name, i);
557 osd_oi_close_table(env, o);
566 * Determine if the type and number of OIs used by this file system.
569 osd_oi_probe(const struct lu_env *env, struct osd_device *o, int *count)
571 uint64_t root_oid = o->od_root;
578 * Check for multiple OIs and determine the count. There is no
579 * gap handling, if an OI is missing the wrong size can be returned.
580 * The only safeguard is that we know the number of OIs must be a
581 * power of two and this is checked for basic sanity.
583 for (*count = 0; *count < OSD_OI_FID_NR_MAX; (*count)++) {
584 sprintf(name, "%s.%d", DMU_OSD_OI_NAME_BASE, *count);
585 rc = osd_oi_lookup(env, o, root_oid, name, &oi);
593 if ((*count & (*count - 1)) != 0)
603 * No OIs exist, this must be a new filesystem.
610 static void osd_ost_seq_init(const struct lu_env *env, struct osd_device *osd)
612 struct osd_seq_list *osl = &osd->od_seq_list;
614 CFS_INIT_LIST_HEAD(&osl->osl_seq_list);
615 rwlock_init(&osl->osl_seq_list_lock);
616 sema_init(&osl->osl_seq_init_sem, 1);
619 static void osd_ost_seq_fini(const struct lu_env *env, struct osd_device *osd)
621 struct osd_seq_list *osl = &osd->od_seq_list;
622 struct osd_seq *osd_seq, *tmp;
624 write_lock(&osl->osl_seq_list_lock);
625 cfs_list_for_each_entry_safe(osd_seq, tmp, &osl->osl_seq_list,
627 cfs_list_del(&osd_seq->os_seq_list);
628 OBD_FREE(osd_seq->os_compat_dirs,
629 sizeof(uint64_t) * osd_seq->os_subdir_count);
630 OBD_FREE(osd_seq, sizeof(*osd_seq));
632 write_unlock(&osl->osl_seq_list_lock);
638 * Create /O subdirectory to map legacy OST objects for compatibility.
641 osd_oi_init_compat(const struct lu_env *env, struct osd_device *o)
647 rc = osd_oi_find_or_create(env, o, o->od_root, "O", &sdb);
653 osd_ost_seq_init(env, o);
654 /* Create on-disk indexes to maintain per-UID/GID inode usage.
655 * Those new indexes are created in the top-level ZAP outside the
656 * namespace in order not to confuse ZPL which might interpret those
657 * indexes as directories and assume the values are object IDs */
658 rc = osd_oi_find_or_create(env, o, MASTER_NODE_OBJ,
659 oid2name(ACCT_USER_OID), &odb);
662 o->od_iusr_oid = odb;
664 rc = osd_oi_find_or_create(env, o, MASTER_NODE_OBJ,
665 oid2name(ACCT_GROUP_OID), &odb);
668 o->od_igrp_oid = odb;
673 static char *root2convert = "ROOT";
675 * due to DNE requirements we have to change sequence of /ROOT object
676 * so that it doesn't belong to the local sequence FID_SEQ_LOCAL_FILE
677 * but a normal sequence living on MDS#0
678 * this is the sole purpose of this function.
680 * This is only needed for pre-production 2.4 ZFS filesystems, and
681 * can be removed in the future.
683 int osd_convert_root_to_new_seq(const struct lu_env *env,
684 struct osd_device *o)
686 struct luz_direntry *lze = &osd_oti_get(env)->oti_zde;
687 char *buf = osd_oti_get(env)->oti_str;
688 struct lu_fid newfid;
695 if (strstr(o->od_svname, "MDT") == NULL)
699 rc = -zap_lookup(o->od_objset.os, o->od_root, root2convert, 8,
700 sizeof(*lze) / 8, (void *)lze);
701 /* doesn't exist or let actual user to handle the error */
705 CDEBUG(D_OTHER, "%s: /ROOT -> "DFID" -> "LPU64"\n", o->od_svname,
706 PFID(&lze->lzd_fid), (long long int) lze->lzd_reg.zde_dnode);
708 /* already right one? */
709 if (fid_seq(&lze->lzd_fid) == FID_SEQ_ROOT)
712 tx = dmu_tx_create(o->od_objset.os);
716 dmu_tx_hold_bonus(tx, o->od_root);
718 /* declare delete/insert of the name */
719 dmu_tx_hold_zap(tx, o->od_root, TRUE, root2convert);
720 dmu_tx_hold_zap(tx, o->od_root, FALSE, root2convert);
722 /* declare that we'll remove object from fid-dnode mapping */
723 zapid = osd_get_name_n_idx(env, o, &lze->lzd_fid, buf);
724 dmu_tx_hold_bonus(tx, zapid);
725 dmu_tx_hold_zap(tx, zapid, FALSE, buf);
727 /* declare that we'll add object to fid-dnode mapping */
728 newfid.f_seq = FID_SEQ_ROOT;
731 zapid = osd_get_name_n_idx(env, o, &newfid, buf);
732 dmu_tx_hold_bonus(tx, zapid);
733 dmu_tx_hold_zap(tx, zapid, TRUE, buf);
735 rc = -dmu_tx_assign(tx, TXG_WAIT);
739 rc = -zap_remove(o->od_objset.os, o->od_root, root2convert, tx);
744 zapid = osd_get_name_n_idx(env, o, &lze->lzd_fid, buf);
745 rc = -zap_remove(o->od_objset.os, zapid, buf, tx);
749 lze->lzd_fid = newfid;
750 rc = -zap_add(o->od_objset.os, o->od_root, root2convert,
751 8, sizeof(*lze) / 8, (void *)lze, tx);
755 /* add to OI with the new fid */
756 zapid = osd_get_name_n_idx(env, o, &newfid, buf);
757 rc = -zap_add(o->od_objset.os, zapid, buf, 8, 1, &lze->lzd_reg, tx);
762 /* LMA will be updated in mdd_compat_fixes */
770 CERROR("%s: can't convert to new fid: rc = %d\n", o->od_svname, rc);
775 * Initialize the OIs by either opening or creating them as needed.
777 int osd_oi_init(const struct lu_env *env, struct osd_device *o)
779 char *key = osd_oti_get(env)->oti_buf;
780 int i, rc, count = 0;
783 rc = osd_oi_probe(env, o, &count);
790 count = osd_oi_count;
793 for (i = 0; i < count; i++) {
794 sprintf(key, "%s.%d", DMU_OSD_OI_NAME_BASE, i);
795 rc = osd_oi_find_or_create(env, o, odb, key, &sdb);
801 rc = osd_oi_init_compat(env, o);
805 LASSERT((count & (count - 1)) == 0);
806 o->od_oi_count = count;
807 OBD_ALLOC(o->od_oi_table, sizeof(struct osd_oi *) * count);
808 if (o->od_oi_table == NULL)
811 rc = osd_oi_open_table(env, o, count);
813 OBD_FREE(o->od_oi_table, sizeof(struct osd_oi *) * count);
814 o->od_oi_table = NULL;
820 void osd_oi_fini(const struct lu_env *env, struct osd_device *o)
824 osd_ost_seq_fini(env, o);
826 if (o->od_oi_table != NULL) {
827 (void) osd_oi_close_table(env, o);
828 OBD_FREE(o->od_oi_table,
829 sizeof(struct osd_oi *) * o->od_oi_count);
830 o->od_oi_table = NULL;
837 int osd_options_init(void)
839 /* osd_oi_count - Default number of OIs, 128 works well for ZFS */
840 if (osd_oi_count == 0 || osd_oi_count > OSD_OI_FID_NR_MAX)
841 osd_oi_count = OSD_OI_FID_NR;
843 if ((osd_oi_count & (osd_oi_count - 1)) != 0) {
844 LCONSOLE_WARN("Round up osd_oi_count %d to power2 %d\n",
845 osd_oi_count, size_roundup_power2(osd_oi_count));
846 osd_oi_count = size_roundup_power2(osd_oi_count);