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/
31 * lustre/include/lustre_fid.h
33 * Author: Yury Umanets <umka@clusterfs.com>
36 #ifndef __LUSTRE_FID_H
37 #define __LUSTRE_FID_H
43 * http://wiki.lustre.org/index.php/Architecture_-_Interoperability_fids_zfs
44 * describes the FID namespace and interoperability requirements for FIDs.
45 * The important parts of that document are included here for reference.
48 * File IDentifier generated by client from range allocated by the SEQuence
49 * service and stored in struct lu_fid. The FID is composed of three parts:
50 * SEQuence, ObjectID, and VERsion. The SEQ component is a filesystem
51 * unique 64-bit integer, and only one client is ever assigned any SEQ value.
52 * The first 0x400 FID_SEQ_NORMAL [2^33, 2^33 + 0x400] values are reserved
53 * for system use. The OID component is a 32-bit value generated by the
54 * client on a per-SEQ basis to allow creating many unique FIDs without
55 * communication with the server. The VER component is a 32-bit value that
56 * distinguishes between different FID instantiations, such as snapshots or
57 * separate subtrees within the filesystem. FIDs with the same VER field
58 * are considered part of the same namespace.
60 * OLD filesystems are those upgraded from Lustre 1.x that predate FIDs, and
61 * MDTs use 32-bit ldiskfs internal inode/generation numbers (IGIFs), while
62 * OSTs use 64-bit Lustre object IDs and generation numbers.
64 * NEW filesystems are those formatted since the introduction of FIDs.
67 * Inode and Generation In FID, a surrogate FID used to globally identify
68 * an existing object on OLD formatted MDT file system. This would only be
69 * used on MDT0 in a DNE filesystem, because there cannot be more than one
70 * MDT in an OLD formatted filesystem. Belongs to sequence in [12, 2^32 - 1]
71 * range, where inode number is stored in SEQ, and inode generation is in OID.
72 * NOTE: This assumes no more than 2^32-1 inodes exist in the MDT filesystem,
73 * which is the maximum possible for an ldiskfs backend. It also assumes
74 * that the reserved ext3/ext4/ldiskfs inode numbers [0-11] are never visible
75 * to clients, which has always been true.
78 * object ID In FID, a surrogate FID used to globally identify an existing
79 * OST object on OLD formatted OST file system. Belongs to a sequence in
80 * [2^32, 2^33 - 1]. Sequence number is calculated as:
82 * 1 << 32 | (ost_index << 16) | ((objid >> 32) & 0xffff)
84 * that is, SEQ consists of 16-bit OST index, and higher 16 bits of object
85 * ID. The generation of unique SEQ values per OST allows the IDIF FIDs to
86 * be identified in the FLD correctly. The OID field is calculated as:
90 * that is, it consists of lower 32 bits of object ID. For objects within
91 * the IDIF range, object ID extraction will be:
93 * o_id = (fid->f_seq & 0x7fff) << 16 | fid->f_oid;
94 * o_seq = 0; // formerly group number
96 * NOTE: This assumes that no more than 2^48-1 objects have ever been created
97 * on any OST, and that no more than 65535 OSTs are in use. Both are very
98 * reasonable assumptions, i.e. an IDIF can uniquely map all objects assuming
99 * a maximum creation rate of 1M objects per second for a maximum of 9 years,
100 * or combinations thereof.
103 * Surrogate FID used to identify an existing object on OLD formatted OST
104 * filesystem. Belongs to the reserved SEQuence 0, and is used prior to
105 * the introduction of FID-on-OST, at which point IDIF will be used to
106 * identify objects as residing on a specific OST.
109 * For Lustre Log objects the object sequence 1 is used. This is compatible
110 * with both OLD and NEW namespaces, as this SEQ number is in the
111 * ext3/ldiskfs reserved inode range and does not conflict with IGIF
115 * For testing OST IO performance the object sequence 2 is used. This is
116 * compatible with both OLD and NEW namespaces, as this SEQ number is in
117 * the ext3/ldiskfs reserved inode range and does not conflict with IGIF
120 * OST_MDT1 .. OST_MAX
121 * For testing with multiple MDTs the object sequence 3 through 9 is used,
122 * allowing direct mapping of MDTs 1 through 7 respectively, for a total
123 * of 8 MDTs including OST_MDT0. This matches the legacy CMD project "group"
124 * mappings. However, this SEQ range is only for testing prior to any
125 * production DNE release, as the objects in this range conflict across all
126 * OSTs, as the OST index is not part of the FID. For production DNE usage,
127 * OST objects created by MDT1+ will use FID_SEQ_NORMAL FIDs.
129 * DLM OST objid to IDIF mapping
130 * For compatibility with existing OLD OST network protocol structures, the
131 * FID must map onto the o_id and o_seq in a manner that ensures existing
132 * objects are identified consistently for IO, as well as onto the LDLM
133 * namespace to ensure IDIFs there is only a single resource name for any
134 * object in the DLM. The OLD OST object DLM resource mapping is:
136 * resource[] = {o_id, o_seq, 0, 0}; // o_seq == 0 for production releases
138 * The NEW OST object DLM resource mapping is the same for both MDT and OST:
140 * resource[] = {SEQ, OID, VER, HASH};
142 * NOTE: for mapping IDIF values to DLM resource names the o_id may be
143 * larger than the 2^33 reserved sequence numbers for IDIF, so it is possible
144 * for the o_id numbers to overlap FID SEQ numbers in the resource. However,
145 * in all production releases the OLD o_seq field is always zero, and all
146 * valid FID OID values are non-zero, so the lock resources will not collide.
147 * Even so, the MDT and OST resources are also in different LDLM namespaces.
150 #include <libcfs/libcfs.h>
151 #include <uapi/linux/lustre/lustre_fid.h>
152 #include <uapi/linux/lustre/lustre_idl.h>
153 #include <uapi/linux/lustre/lustre_ostid.h>
155 /* Lustre service names are following the format
156 * service name + MDT + seq name
158 #define LUSTRE_MDT_MAXNAMELEN 80
166 /* Whole sequences space range and zero range definitions */
167 extern const struct lu_seq_range LUSTRE_SEQ_SPACE_RANGE;
168 extern const struct lu_seq_range LUSTRE_SEQ_ZERO_RANGE;
169 extern const struct lu_fid LUSTRE_BFL_FID;
170 extern const struct lu_fid LU_OBF_FID;
171 extern const struct lu_fid LU_LPF_FID;
172 extern const struct lu_fid LU_DOT_LUSTRE_FID;
173 extern const struct lu_fid LU_BACKEND_LPF_FID;
177 * This is how may metadata FIDs may be allocated in one sequence(128k)
179 LUSTRE_METADATA_SEQ_MAX_WIDTH = 0x0000000000020000ULL,
182 * This is how many data FIDs could be allocated in one sequence(32M - 1)
184 LUSTRE_DATA_SEQ_MAX_WIDTH = 0x0000000001FFFFFFULL,
187 * How many sequences to allocate to a client at once.
189 LUSTRE_SEQ_META_WIDTH = 0x0000000000000001ULL,
192 * seq allocation pool size.
194 LUSTRE_SEQ_BATCH_WIDTH = LUSTRE_SEQ_META_WIDTH * 1000,
197 * This is how many sequences may be in one super-sequence allocated to
200 LUSTRE_SEQ_SUPER_WIDTH = ((1ULL << 30ULL) * LUSTRE_SEQ_META_WIDTH)
203 /** special OID for local objects */
205 /** \see fld_mod_init */
207 /** \see fid_mod_init */
208 FID_SEQ_CTL_OID = 4UL,
209 FID_SEQ_SRV_OID = 5UL,
210 /** \see mdd_mod_init */
211 MDD_ROOT_INDEX_OID = 6UL, /* deprecated in 2.4 */
212 MDD_ORPHAN_OID = 7UL, /* deprecated in 2.4 */
213 MDD_LOV_OBJ_OID = 8UL,
214 MDD_CAPA_KEYS_OID = 9UL,
215 /** \see mdt_mod_init */
216 LAST_RECV_OID = 11UL,
217 OSD_FS_ROOT_OID = 13UL,
218 ACCT_USER_OID = 15UL,
219 ACCT_GROUP_OID = 16UL,
220 LFSCK_BOOKMARK_OID = 17UL,
221 OTABLE_IT_OID = 18UL,
223 REPLY_DATA_OID = 21UL,
224 ACCT_PROJECT_OID = 22UL,
225 INDEX_BACKUP_OID = 4116UL,
226 OFD_LAST_GROUP_OID = 4117UL,
227 LLOG_CATALOGS_OID = 4118UL,
228 MGS_CONFIGS_OID = 4119UL,
229 OFD_HEALTH_CHECK_OID = 4120UL,
230 MDD_LOV_OBJ_OSEQ = 4121UL,
231 LFSCK_NAMESPACE_OID = 4122UL,
232 REMOTE_PARENT_DIR_OID = 4123UL,
233 /* This definition is obsolete
234 * SLAVE_LLOG_CATALOGS_OID = 4124UL,
236 BATCHID_COMMITTED_OID = 4125UL,
239 static inline void lu_local_obj_fid(struct lu_fid *fid, __u32 oid)
241 fid->f_seq = FID_SEQ_LOCAL_FILE;
246 static inline void lu_local_name_obj_fid(struct lu_fid *fid, __u32 oid)
248 fid->f_seq = FID_SEQ_LOCAL_NAME;
253 /* For new FS (>= 2.4), the root FID will be changed to
254 * [FID_SEQ_ROOT:1:0], for existing FS, (upgraded to 2.4),
255 * the root FID will still be IGIF */
256 static inline int fid_is_root(const struct lu_fid *fid)
258 return unlikely((fid_seq(fid) == FID_SEQ_ROOT &&
259 fid_oid(fid) == FID_OID_ROOT));
262 static inline int fid_is_dot_lustre(const struct lu_fid *fid)
264 return unlikely(fid_seq(fid) == FID_SEQ_DOT_LUSTRE &&
265 fid_oid(fid) == FID_OID_DOT_LUSTRE);
268 static inline int fid_is_obf(const struct lu_fid *fid)
270 return unlikely(fid_seq(fid) == FID_SEQ_DOT_LUSTRE &&
271 fid_oid(fid) == FID_OID_DOT_LUSTRE_OBF);
274 static inline int fid_is_otable_it(const struct lu_fid *fid)
276 return unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE &&
277 fid_oid(fid) == OTABLE_IT_OID);
280 static inline int fid_oid_is_quota(const struct lu_fid *fid)
282 switch (fid_oid(fid)) {
285 case ACCT_PROJECT_OID:
292 static inline int fid_is_acct(const struct lu_fid *fid)
294 return fid_seq(fid) == FID_SEQ_LOCAL_FILE &&
295 fid_oid_is_quota(fid);
298 static inline int fid_is_quota(const struct lu_fid *fid)
300 return fid_seq(fid) == FID_SEQ_QUOTA ||
301 fid_seq(fid) == FID_SEQ_QUOTA_GLB;
304 static inline int fid_is_name_llog(const struct lu_fid *fid)
306 return fid_seq(fid) == FID_SEQ_LLOG_NAME;
309 static inline int fid_seq_in_fldb(u64 seq)
311 return fid_seq_is_igif(seq) || fid_seq_is_norm(seq) ||
312 fid_seq_is_root(seq) || fid_seq_is_dot(seq);
315 #ifdef HAVE_SERVER_SUPPORT
316 static inline int fid_is_namespace_visible(const struct lu_fid *fid)
318 const __u64 seq = fid_seq(fid);
320 /* Here, we cannot distinguish whether the normal FID is for OST
321 * object or not. It is caller's duty to check more if needed. */
322 return (!fid_is_last_id(fid) &&
323 (fid_seq_is_norm(seq) || fid_seq_is_igif(seq))) ||
324 fid_is_root(fid) || fid_seq_is_dot(seq);
327 static inline void ost_layout_cpu_to_le(struct ost_layout *dst,
328 const struct ost_layout *src)
330 dst->ol_stripe_size = __cpu_to_le32(src->ol_stripe_size);
331 dst->ol_stripe_count = __cpu_to_le32(src->ol_stripe_count);
332 dst->ol_comp_start = __cpu_to_le64(src->ol_comp_start);
333 dst->ol_comp_end = __cpu_to_le64(src->ol_comp_end);
334 dst->ol_comp_id = __cpu_to_le32(src->ol_comp_id);
337 static inline void ost_layout_le_to_cpu(struct ost_layout *dst,
338 const struct ost_layout *src)
340 dst->ol_stripe_size = __le32_to_cpu(src->ol_stripe_size);
341 dst->ol_stripe_count = __le32_to_cpu(src->ol_stripe_count);
342 dst->ol_comp_start = __le64_to_cpu(src->ol_comp_start);
343 dst->ol_comp_end = __le64_to_cpu(src->ol_comp_end);
344 dst->ol_comp_id = __le32_to_cpu(src->ol_comp_id);
347 static inline void filter_fid_cpu_to_le(struct filter_fid *dst,
348 const struct filter_fid *src, int size)
350 fid_cpu_to_le(&dst->ff_parent, &src->ff_parent);
352 if (size < sizeof(struct filter_fid)) {
353 memset(&dst->ff_layout, 0, sizeof(dst->ff_layout));
355 ost_layout_cpu_to_le(&dst->ff_layout, &src->ff_layout);
356 dst->ff_layout_version = cpu_to_le32(src->ff_layout_version);
357 dst->ff_range = cpu_to_le32(src->ff_range);
360 /* XXX: Add more if filter_fid is enlarged in the future. */
363 static inline void filter_fid_le_to_cpu(struct filter_fid *dst,
364 const struct filter_fid *src, int size)
366 fid_le_to_cpu(&dst->ff_parent, &src->ff_parent);
368 if (size < sizeof(struct filter_fid)) {
369 memset(&dst->ff_layout, 0, sizeof(dst->ff_layout));
371 ost_layout_le_to_cpu(&dst->ff_layout, &src->ff_layout);
372 dst->ff_layout_version = le32_to_cpu(src->ff_layout_version);
373 dst->ff_range = le32_to_cpu(src->ff_range);
376 /* XXX: Add more if filter_fid is enlarged in the future. */
378 #endif /* HAVE_SERVER_SUPPORT */
380 static inline void lu_last_id_fid(struct lu_fid *fid, __u64 seq, __u32 ost_idx)
382 if (fid_seq_is_mdt0(seq)) {
383 fid->f_seq = fid_idif_seq(0, ost_idx);
385 LASSERTF(fid_seq_is_norm(seq) || fid_seq_is_echo(seq) ||
386 fid_seq_is_idif(seq), "%#llx\n", seq);
393 static inline bool fid_is_md_operative(const struct lu_fid *fid)
395 return fid_is_mdt0(fid) || fid_is_igif(fid) ||
396 fid_is_norm(fid) || fid_is_root(fid);
399 /* seq client type */
401 LUSTRE_SEQ_METADATA = 1,
407 LUSTRE_SEQ_CONTROLLER
410 struct lu_server_seq;
412 /* Client sequence manager interface. */
413 struct lu_client_seq {
414 /* Sequence-controller export. */
415 struct obd_export *lcs_exp;
416 struct mutex lcs_mutex;
419 * Range of allowed for allocation sequeces. When using lu_client_seq on
420 * clients, this contains meta-sequence range. And for servers this
421 * contains super-sequence range.
423 struct lu_seq_range lcs_space;
425 /* Seq related debugfs */
426 struct dentry *lcs_debugfs_entry;
428 /* This holds last allocated fid in last obtained seq */
429 struct lu_fid lcs_fid;
431 /* LUSTRE_SEQ_METADATA or LUSTRE_SEQ_DATA */
432 enum lu_cli_type lcs_type;
435 * Service uuid, passed from MDT + seq name to form unique seq name to
436 * use it with debugfs.
438 char lcs_name[LUSTRE_MDT_MAXNAMELEN];
441 * Sequence width, that is how many objects may be allocated in one
442 * sequence. Default value for it is LUSTRE_SEQ_MAX_WIDTH.
446 /* Seq-server for direct talking */
447 struct lu_server_seq *lcs_srv;
450 /* server sequence manager interface */
451 struct lu_server_seq {
452 /* Available sequences space */
453 struct lu_seq_range lss_space;
455 /* keeps highwater in lsr_end for seq allocation algorithm */
456 struct lu_seq_range lss_lowater_set;
457 struct lu_seq_range lss_hiwater_set;
460 * Device for server side seq manager needs (saving sequences to backing
463 struct dt_device *lss_dev;
465 /* /seq file object device */
466 struct dt_object *lss_obj;
468 /* Seq related debugfs */
469 struct dentry *lss_debugfs_entry;
471 /* LUSTRE_SEQ_SERVER or LUSTRE_SEQ_CONTROLLER */
472 enum lu_mgr_type lss_type;
474 /* Client interface to request controller */
475 struct lu_client_seq *lss_cli;
477 /* Mutex for protecting allocation */
478 struct mutex lss_mutex;
481 * Service uuid, passed from MDT + seq name to form unique seq name to
482 * use it with debugfs.
484 char lss_name[LUSTRE_MDT_MAXNAMELEN];
487 * Allocation chunks for super and meta sequences. Default values are
488 * LUSTRE_SEQ_SUPER_WIDTH and LUSTRE_SEQ_META_WIDTH.
493 * minimum lss_alloc_set size that should be allocated from
498 /* sync is needed for update operation */
502 * Pointer to site object, required to access site fld.
504 struct seq_server_site *lss_site;
507 struct seq_server_site {
508 struct lu_site *ss_lu;
510 * mds number of this site.
514 * Fid location database
516 struct lu_server_fld *ss_server_fld;
517 struct lu_client_fld *ss_client_fld;
522 struct lu_server_seq *ss_server_seq;
525 * Controller Seq Manager
527 struct lu_server_seq *ss_control_seq;
528 struct obd_export *ss_control_exp;
533 struct lu_client_seq *ss_client_seq;
538 int seq_server_init(const struct lu_env *env,
539 struct lu_server_seq *seq,
540 struct dt_device *dev,
542 enum lu_mgr_type type,
543 struct seq_server_site *ss);
545 void seq_server_fini(struct lu_server_seq *seq,
546 const struct lu_env *env);
548 int seq_server_alloc_super(struct lu_server_seq *seq,
549 struct lu_seq_range *out,
550 const struct lu_env *env);
552 int seq_server_alloc_meta(struct lu_server_seq *seq,
553 struct lu_seq_range *out,
554 const struct lu_env *env);
556 int seq_server_set_cli(const struct lu_env *env,
557 struct lu_server_seq *seq,
558 struct lu_client_seq *cli);
560 int seq_server_check_and_alloc_super(const struct lu_env *env,
561 struct lu_server_seq *seq);
563 void seq_client_init(struct lu_client_seq *seq,
564 struct obd_export *exp,
565 enum lu_cli_type type,
567 struct lu_server_seq *srv);
569 void seq_client_fini(struct lu_client_seq *seq);
571 void seq_client_flush(struct lu_client_seq *seq);
573 int seq_client_alloc_fid(const struct lu_env *env, struct lu_client_seq *seq,
575 int seq_client_get_seq(const struct lu_env *env, struct lu_client_seq *seq,
577 int seq_site_fini(const struct lu_env *env, struct seq_server_site *ss);
578 /* Fids common stuff */
579 int fid_is_local(const struct lu_env *env,
580 struct lu_site *site, const struct lu_fid *fid);
583 int client_fid_init(struct obd_device *obd, struct obd_export *exp,
584 enum lu_cli_type type);
585 int client_fid_fini(struct obd_device *obd);
589 struct ldlm_namespace;
592 * Build (DLM) resource name from FID.
594 * NOTE: until Lustre 1.8.7/2.1.1 the fid_ver() was packed into name[2],
595 * but was moved into name[1] along with the OID to avoid consuming the
596 * renaming name[2,3] fields that need to be used for the quota identifier.
599 fid_build_reg_res_name(const struct lu_fid *fid, struct ldlm_res_id *res)
601 memset(res, 0, sizeof(*res));
602 res->name[LUSTRE_RES_ID_SEQ_OFF] = fid_seq(fid);
603 res->name[LUSTRE_RES_ID_VER_OID_OFF] = fid_ver_oid(fid);
607 * Return true if resource is for object identified by FID.
609 static inline int fid_res_name_eq(const struct lu_fid *fid,
610 const struct ldlm_res_id *res)
612 return res->name[LUSTRE_RES_ID_SEQ_OFF] == fid_seq(fid) &&
613 res->name[LUSTRE_RES_ID_VER_OID_OFF] == fid_ver_oid(fid);
617 * Extract FID from LDLM resource. Reverse of fid_build_reg_res_name().
620 fid_extract_from_res_name(struct lu_fid *fid, const struct ldlm_res_id *res)
622 fid->f_seq = res->name[LUSTRE_RES_ID_SEQ_OFF];
623 fid->f_oid = (__u32)(res->name[LUSTRE_RES_ID_VER_OID_OFF]);
624 fid->f_ver = (__u32)(res->name[LUSTRE_RES_ID_VER_OID_OFF] >> 32);
625 LASSERT(fid_res_name_eq(fid, res));
629 * Build (DLM) resource identifier from global quota FID and quota ID.
632 fid_build_quota_res_name(const struct lu_fid *glb_fid, union lquota_id *qid,
633 struct ldlm_res_id *res)
635 fid_build_reg_res_name(glb_fid, res);
636 res->name[LUSTRE_RES_ID_QUOTA_SEQ_OFF] = fid_seq(&qid->qid_fid);
637 res->name[LUSTRE_RES_ID_QUOTA_VER_OID_OFF] = fid_ver_oid(&qid->qid_fid);
641 * Extract global FID and quota ID from resource name
643 static inline void fid_extract_from_quota_res(struct lu_fid *glb_fid,
644 union lquota_id *qid,
645 const struct ldlm_res_id *res)
647 fid_extract_from_res_name(glb_fid, res);
648 qid->qid_fid.f_seq = res->name[LUSTRE_RES_ID_QUOTA_SEQ_OFF];
649 qid->qid_fid.f_oid = (__u32)res->name[LUSTRE_RES_ID_QUOTA_VER_OID_OFF];
651 (__u32)(res->name[LUSTRE_RES_ID_QUOTA_VER_OID_OFF] >> 32);
655 fid_build_pdo_res_name(const struct lu_fid *fid, unsigned int hash,
656 struct ldlm_res_id *res)
658 fid_build_reg_res_name(fid, res);
659 res->name[LUSTRE_RES_ID_HSH_OFF] = hash;
663 * Build DLM resource name from object id & seq, which will be removed
664 * finally, when we replace ost_id with FID in data stack.
666 * Currently, resid from the old client, whose res[0] = object_id,
667 * res[1] = object_seq, is just oposite with Metatdata
668 * resid, where, res[0] = fid->f_seq, res[1] = fid->f_oid.
669 * To unifiy the resid identification, we will reverse the data
670 * resid to keep it same with Metadata resid, i.e.
672 * For resid from the old client,
673 * res[0] = objid, res[1] = 0, still keep the original order,
677 * res will be built from normal FID directly, i.e. res[0] = f_seq,
678 * res[1] = f_oid + f_ver.
680 static inline void ostid_build_res_name(const struct ost_id *oi,
681 struct ldlm_res_id *name)
683 memset(name, 0, sizeof *name);
684 if (fid_seq_is_mdt0(ostid_seq(oi))) {
685 name->name[LUSTRE_RES_ID_SEQ_OFF] = ostid_id(oi);
686 name->name[LUSTRE_RES_ID_VER_OID_OFF] = ostid_seq(oi);
688 fid_build_reg_res_name(&oi->oi_fid, name);
693 * Return true if the resource is for the object identified by this id & group.
695 static inline bool ostid_res_name_eq(const struct ost_id *oi,
696 const struct ldlm_res_id *name)
698 /* Note: it is just a trick here to save some effort, probably the
699 * correct way would be turn them into the FID and compare */
700 if (fid_seq_is_mdt0(ostid_seq(oi))) {
701 return name->name[LUSTRE_RES_ID_SEQ_OFF] == ostid_id(oi) &&
702 name->name[LUSTRE_RES_ID_VER_OID_OFF] == ostid_seq(oi);
704 return name->name[LUSTRE_RES_ID_SEQ_OFF] == ostid_seq(oi) &&
705 name->name[LUSTRE_RES_ID_VER_OID_OFF] == ostid_id(oi);
710 * Note: we need check oi_seq to decide where to set oi_id,
711 * so oi_seq should always be set ahead of oi_id.
713 static inline int ostid_set_id(struct ost_id *oi, __u64 oid)
715 if (fid_seq_is_mdt0(oi->oi.oi_seq)) {
716 if (oid > IDIF_MAX_OID)
719 } else if (fid_is_idif(&oi->oi_fid)) {
720 if (oid > IDIF_MAX_OID)
722 oi->oi_fid.f_seq = fid_idif_seq(oid,
723 fid_idif_ost_idx(&oi->oi_fid));
724 oi->oi_fid.f_oid = oid;
725 oi->oi_fid.f_ver = oid >> 48;
727 if (oid > OBIF_MAX_OID)
729 oi->oi_fid.f_oid = oid;
734 /* pack any OST FID into an ostid (id/seq) for the wire/disk */
735 static inline int fid_to_ostid(const struct lu_fid *fid, struct ost_id *ostid)
739 if (fid_seq_is_igif(fid->f_seq))
742 if (fid_is_idif(fid)) {
743 ostid_set_seq_mdt0(ostid);
744 rc = ostid_set_id(ostid, fid_idif_id(fid_seq(fid),
745 fid_oid(fid), fid_ver(fid)));
747 ostid->oi_fid = *fid;
753 /* The same as osc_build_res_name() */
754 static inline void ost_fid_build_resid(const struct lu_fid *fid,
755 struct ldlm_res_id *resname)
757 if (fid_is_mdt0(fid) || fid_is_idif(fid)) {
759 oi.oi.oi_id = 0; /* gcc 4.7.2 complains otherwise */
760 if (fid_to_ostid(fid, &oi) != 0)
762 ostid_build_res_name(&oi, resname);
764 fid_build_reg_res_name(fid, resname);
768 static inline void ost_fid_from_resid(struct lu_fid *fid,
769 const struct ldlm_res_id *name,
772 if (fid_seq_is_mdt0(name->name[LUSTRE_RES_ID_VER_OID_OFF])) {
776 memset(&oi, 0, sizeof(oi));
777 ostid_set_seq(&oi, name->name[LUSTRE_RES_ID_VER_OID_OFF]);
778 if (ostid_set_id(&oi, name->name[LUSTRE_RES_ID_SEQ_OFF])) {
779 CERROR("Bad %llu to set " DOSTID "\n",
780 name->name[LUSTRE_RES_ID_SEQ_OFF], POSTID(&oi));
782 ostid_to_fid(fid, &oi, ost_idx);
785 fid_extract_from_res_name(fid, name);
789 static inline __u32 fid_hash(const struct lu_fid *f, int bits)
792 * All objects with same id and different versions will belong to same
795 return cfs_hash_long(fid_flatten64(f), bits);
799 lu_fid_diff(const struct lu_fid *fid1, const struct lu_fid *fid2)
801 LASSERTF(fid_seq(fid1) == fid_seq(fid2), "fid1:"DFID", fid2:"DFID"\n",
802 PFID(fid1), PFID(fid2));
804 if (fid_is_idif(fid1) && fid_is_idif(fid2))
805 return fid_idif_id(fid1->f_seq, fid1->f_oid, fid1->f_ver) -
806 fid_idif_id(fid2->f_seq, fid2->f_oid, fid2->f_ver);
808 return fid_oid(fid1) - fid_oid(fid2);
811 static inline int fid_set_id(struct lu_fid *fid, u64 oid)
813 if (unlikely(fid_seq_is_igif(fid->f_seq))) {
814 CERROR("bad IGIF, "DFID"\n", PFID(fid));
818 if (fid_is_idif(fid)) {
819 if (oid > IDIF_MAX_OID) {
820 CERROR("Too large OID %#llx to set IDIF "DFID"\n",
821 (unsigned long long)oid, PFID(fid));
824 fid->f_seq = fid_idif_seq(oid, fid_idif_ost_idx(fid));
826 fid->f_ver = oid >> 48;
828 if (oid > OBIF_MAX_OID) {
829 CERROR("Too large OID %#llx to set REG "DFID"\n",
830 (unsigned long long)oid, PFID(fid));
838 #define LUSTRE_SEQ_SRV_NAME "seq_srv"
839 #define LUSTRE_SEQ_CTL_NAME "seq_ctl"
841 /* Range common stuff */
843 range_cpu_to_le(struct lu_seq_range *dst, const struct lu_seq_range *src)
845 dst->lsr_start = cpu_to_le64(src->lsr_start);
846 dst->lsr_end = cpu_to_le64(src->lsr_end);
847 dst->lsr_index = cpu_to_le32(src->lsr_index);
848 dst->lsr_flags = cpu_to_le32(src->lsr_flags);
852 range_le_to_cpu(struct lu_seq_range *dst, const struct lu_seq_range *src)
854 dst->lsr_start = le64_to_cpu(src->lsr_start);
855 dst->lsr_end = le64_to_cpu(src->lsr_end);
856 dst->lsr_index = le32_to_cpu(src->lsr_index);
857 dst->lsr_flags = le32_to_cpu(src->lsr_flags);
861 range_cpu_to_be(struct lu_seq_range *dst, const struct lu_seq_range *src)
863 dst->lsr_start = cpu_to_be64(src->lsr_start);
864 dst->lsr_end = cpu_to_be64(src->lsr_end);
865 dst->lsr_index = cpu_to_be32(src->lsr_index);
866 dst->lsr_flags = cpu_to_be32(src->lsr_flags);
870 range_be_to_cpu(struct lu_seq_range *dst, const struct lu_seq_range *src)
872 dst->lsr_start = be64_to_cpu(src->lsr_start);
873 dst->lsr_end = be64_to_cpu(src->lsr_end);
874 dst->lsr_index = be32_to_cpu(src->lsr_index);
875 dst->lsr_flags = be32_to_cpu(src->lsr_flags);
878 static inline void range_array_cpu_to_le(struct lu_seq_range_array *dst,
879 const struct lu_seq_range_array *src)
883 for (i = 0; i < src->lsra_count; i++)
884 range_cpu_to_le(&dst->lsra_lsr[i], &src->lsra_lsr[i]);
886 dst->lsra_count = cpu_to_le32(src->lsra_count);
889 static inline void range_array_le_to_cpu(struct lu_seq_range_array *dst,
890 const struct lu_seq_range_array *src)
894 dst->lsra_count = le32_to_cpu(src->lsra_count);
895 for (i = 0; i < dst->lsra_count; i++)
896 range_le_to_cpu(&dst->lsra_lsr[i], &src->lsra_lsr[i]);
901 #endif /* __LUSTRE_FID_H */