1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * Author: Wang Di <wangdi@clusterfs.com>
42 # define EXPORT_SYMTAB
44 #define DEBUG_SUBSYSTEM S_LOV
47 #include <asm/div64.h>
48 #include <libcfs/libcfs.h>
50 #include <liblustre.h>
53 #include <obd_class.h>
55 #include <lustre/lustre_idl.h>
56 #include <lustre_log.h>
58 #include "lov_internal.h"
60 struct lovea_unpack_args {
61 struct lov_stripe_md *lsm;
65 static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
69 if (stripe_count == 0 || stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
70 CERROR("bad stripe count %d\n", stripe_count);
71 lov_dump_lmm(D_WARNING, lmm);
75 if (lmm->lmm_object_id == 0) {
76 CERROR("zero object id\n");
77 lov_dump_lmm(D_WARNING, lmm);
81 if (lmm->lmm_pattern != cpu_to_le32(LOV_PATTERN_RAID0)) {
82 CERROR("bad striping pattern\n");
83 lov_dump_lmm(D_WARNING, lmm);
87 if (lmm->lmm_stripe_size == 0 ||
88 (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
89 CERROR("bad stripe size %u\n",
90 le32_to_cpu(lmm->lmm_stripe_size));
91 lov_dump_lmm(D_WARNING, lmm);
97 struct lov_stripe_md *lsm_alloc_plain(int stripe_count, int *size)
99 struct lov_stripe_md *lsm;
100 int i, oinfo_ptrs_size;
101 struct lov_oinfo *loi;
103 LASSERT(stripe_count > 0);
105 oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
106 *size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;
108 OBD_ALLOC(lsm, *size);
112 for (i = 0; i < stripe_count; i++) {
113 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, CFS_ALLOC_IO);
116 lsm->lsm_oinfo[i] = loi;
118 lsm->lsm_stripe_count = stripe_count;
119 lsm->lsm_pool_name[0] = '\0';
124 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
125 OBD_FREE(lsm, *size);
129 void lsm_free_plain(struct lov_stripe_md *lsm)
131 int stripe_count = lsm->lsm_stripe_count;
134 for (i = 0; i < stripe_count; i++)
135 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
136 sizeof(struct lov_oinfo));
137 OBD_FREE(lsm, sizeof(struct lov_stripe_md) +
138 stripe_count * sizeof(struct lov_oinfo *));
141 static void lsm_unpackmd_common(struct lov_stripe_md *lsm,
142 struct lov_mds_md *lmm)
145 * This supposes lov_mds_md_v1/v3 first fields are
148 lsm->lsm_object_id = le64_to_cpu(lmm->lmm_object_id);
149 lsm->lsm_object_seq = le64_to_cpu(lmm->lmm_object_seq);
150 lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
151 lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
152 lsm->lsm_pool_name[0] = '\0';
156 lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno,
157 obd_off *lov_off, obd_off *swidth)
160 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
164 lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno,
165 obd_off *lov_off, obd_off *swidth)
168 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
171 static int lsm_destroy_plain(struct lov_stripe_md *lsm, struct obdo *oa,
172 struct obd_export *md_exp)
177 static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
180 if (lmm_bytes < sizeof(*lmm)) {
181 CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
182 lmm_bytes, (int)sizeof(*lmm));
186 *stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
188 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
189 CERROR("LOV EA V1 too small: %d, need %d\n",
190 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
191 lov_dump_lmm_v1(D_WARNING, lmm);
195 return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
198 int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
199 struct lov_mds_md_v1 *lmm)
201 struct lov_oinfo *loi;
204 lsm_unpackmd_common(lsm, lmm);
206 for (i = 0; i < lsm->lsm_stripe_count; i++) {
207 /* XXX LOV STACKING call down to osc_unpackmd() */
208 loi = lsm->lsm_oinfo[i];
209 loi->loi_id = le64_to_cpu(lmm->lmm_objects[i].l_object_id);
210 loi->loi_seq = le64_to_cpu(lmm->lmm_objects[i].l_object_seq);
211 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
212 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
213 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
214 CERROR("OST index %d more than OST count %d\n",
215 loi->loi_ost_idx, lov->desc.ld_tgt_count);
216 lov_dump_lmm_v1(D_WARNING, lmm);
219 if (!lov->lov_tgts[loi->loi_ost_idx]) {
220 CERROR("OST index %d missing\n", loi->loi_ost_idx);
221 lov_dump_lmm_v1(D_WARNING, lmm);
229 const struct lsm_operations lsm_v1_ops = {
230 .lsm_free = lsm_free_plain,
231 .lsm_destroy = lsm_destroy_plain,
232 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
233 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
234 .lsm_lmm_verify = lsm_lmm_verify_v1,
235 .lsm_unpackmd = lsm_unpackmd_v1,
238 static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
241 struct lov_mds_md_v3 *lmm;
243 lmm = (struct lov_mds_md_v3 *)lmmv1;
245 if (lmm_bytes < sizeof(*lmm)) {
246 CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
247 lmm_bytes, (int)sizeof(*lmm));
251 *stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
253 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)) {
254 CERROR("LOV EA V3 too small: %d, need %d\n",
255 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V3));
256 lov_dump_lmm_v3(D_WARNING, lmm);
260 return lsm_lmm_verify_common((struct lov_mds_md_v1 *)lmm, lmm_bytes,
264 int lsm_unpackmd_v3(struct lov_obd *lov, struct lov_stripe_md *lsm,
265 struct lov_mds_md *lmmv1)
267 struct lov_mds_md_v3 *lmm;
268 struct lov_oinfo *loi;
271 lmm = (struct lov_mds_md_v3 *)lmmv1;
273 lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm);
274 strncpy(lsm->lsm_pool_name, lmm->lmm_pool_name, LOV_MAXPOOLNAME);
276 for (i = 0; i < lsm->lsm_stripe_count; i++) {
277 /* XXX LOV STACKING call down to osc_unpackmd() */
278 loi = lsm->lsm_oinfo[i];
279 loi->loi_id = le64_to_cpu(lmm->lmm_objects[i].l_object_id);
280 loi->loi_seq = le64_to_cpu(lmm->lmm_objects[i].l_object_seq);
281 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
282 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
283 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
284 CERROR("OST index %d more than OST count %d\n",
285 loi->loi_ost_idx, lov->desc.ld_tgt_count);
286 lov_dump_lmm_v3(D_WARNING, lmm);
289 if (!lov->lov_tgts[loi->loi_ost_idx]) {
290 CERROR("OST index %d missing\n", loi->loi_ost_idx);
291 lov_dump_lmm_v3(D_WARNING, lmm);
299 const struct lsm_operations lsm_v3_ops = {
300 .lsm_free = lsm_free_plain,
301 .lsm_destroy = lsm_destroy_plain,
302 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
303 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
304 .lsm_lmm_verify = lsm_lmm_verify_v3,
305 .lsm_unpackmd = lsm_unpackmd_v3,