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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
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>
41 #define DEBUG_SUBSYSTEM S_LOV
44 #include <asm/div64.h>
45 #include <libcfs/libcfs.h>
47 #include <liblustre.h>
50 #include <obd_class.h>
52 #include <lustre/lustre_idl.h>
53 #include <lustre_log.h>
55 #include "lov_internal.h"
57 struct lovea_unpack_args {
58 struct lov_stripe_md *lsm;
62 static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
66 if (stripe_count == 0 || stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
67 CERROR("bad stripe count %d\n", stripe_count);
68 lov_dump_lmm(D_WARNING, lmm);
72 if (lmm->lmm_object_id == 0) {
73 CERROR("zero object id\n");
74 lov_dump_lmm(D_WARNING, lmm);
78 if (lmm->lmm_pattern != cpu_to_le32(LOV_PATTERN_RAID0)) {
79 CERROR("bad striping pattern\n");
80 lov_dump_lmm(D_WARNING, lmm);
84 if (lmm->lmm_stripe_size == 0 ||
85 (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
86 CERROR("bad stripe size %u\n",
87 le32_to_cpu(lmm->lmm_stripe_size));
88 lov_dump_lmm(D_WARNING, lmm);
94 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
96 struct lov_stripe_md *lsm;
97 struct lov_oinfo *loi;
98 int i, oinfo_ptrs_size;
100 LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);
102 oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
103 *size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;
105 OBD_ALLOC_LARGE(lsm, *size);
109 for (i = 0; i < stripe_count; i++) {
110 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, CFS_ALLOC_IO);
113 lsm->lsm_oinfo[i] = loi;
115 lsm->lsm_stripe_count = stripe_count;
120 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
121 OBD_FREE_LARGE(lsm, *size);
125 void lsm_free_plain(struct lov_stripe_md *lsm)
127 __u16 stripe_count = lsm->lsm_stripe_count;
130 for (i = 0; i < stripe_count; i++)
131 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
132 sizeof(struct lov_oinfo));
133 OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) +
134 stripe_count * sizeof(struct lov_oinfo *));
137 static void lsm_unpackmd_common(struct lov_stripe_md *lsm,
138 struct lov_mds_md *lmm)
141 * This supposes lov_mds_md_v1/v3 first fields are
144 lsm->lsm_object_id = le64_to_cpu(lmm->lmm_object_id);
145 lsm->lsm_object_seq = le64_to_cpu(lmm->lmm_object_seq);
146 lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
147 lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
148 lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
149 lsm->lsm_pool_name[0] = '\0';
153 lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno,
154 obd_off *lov_off, obd_off *swidth)
157 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
161 lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno,
162 obd_off *lov_off, obd_off *swidth)
165 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
168 static int lsm_destroy_plain(struct lov_stripe_md *lsm, struct obdo *oa,
169 struct obd_export *md_exp)
174 /* Find minimum stripe maxbytes value. For inactive or
175 * reconnecting targets use LUSTRE_STRIPE_MAXBYTES. */
176 static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes)
178 struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;
180 if (imp == NULL || !tgt->ltd_active) {
181 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
185 cfs_spin_lock(&imp->imp_lock);
186 if (imp->imp_state == LUSTRE_IMP_FULL &&
187 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
188 imp->imp_connect_data.ocd_maxbytes > 0) {
189 if (*stripe_maxbytes > imp->imp_connect_data.ocd_maxbytes)
190 *stripe_maxbytes = imp->imp_connect_data.ocd_maxbytes;
192 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
194 cfs_spin_unlock(&imp->imp_lock);
197 static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
200 if (lmm_bytes < sizeof(*lmm)) {
201 CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
202 lmm_bytes, (int)sizeof(*lmm));
206 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
208 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
209 CERROR("LOV EA V1 too small: %d, need %d\n",
210 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
211 lov_dump_lmm_v1(D_WARNING, lmm);
215 return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
218 int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
219 struct lov_mds_md_v1 *lmm)
221 struct lov_oinfo *loi;
223 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
225 lsm_unpackmd_common(lsm, lmm);
227 for (i = 0; i < lsm->lsm_stripe_count; i++) {
228 /* XXX LOV STACKING call down to osc_unpackmd() */
229 loi = lsm->lsm_oinfo[i];
230 loi->loi_id = le64_to_cpu(lmm->lmm_objects[i].l_object_id);
231 loi->loi_seq = le64_to_cpu(lmm->lmm_objects[i].l_object_seq);
232 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
233 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
234 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
235 CERROR("OST index %d more than OST count %d\n",
236 loi->loi_ost_idx, lov->desc.ld_tgt_count);
237 lov_dump_lmm_v1(D_WARNING, lmm);
240 if (!lov->lov_tgts[loi->loi_ost_idx]) {
241 CERROR("OST index %d missing\n", loi->loi_ost_idx);
242 lov_dump_lmm_v1(D_WARNING, lmm);
245 /* calculate the minimum stripe max bytes */
246 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
250 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
255 const struct lsm_operations lsm_v1_ops = {
256 .lsm_free = lsm_free_plain,
257 .lsm_destroy = lsm_destroy_plain,
258 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
259 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
260 .lsm_lmm_verify = lsm_lmm_verify_v1,
261 .lsm_unpackmd = lsm_unpackmd_v1,
264 static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
267 struct lov_mds_md_v3 *lmm;
269 lmm = (struct lov_mds_md_v3 *)lmmv1;
271 if (lmm_bytes < sizeof(*lmm)) {
272 CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
273 lmm_bytes, (int)sizeof(*lmm));
277 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
279 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)) {
280 CERROR("LOV EA V3 too small: %d, need %d\n",
281 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V3));
282 lov_dump_lmm_v3(D_WARNING, lmm);
286 return lsm_lmm_verify_common((struct lov_mds_md_v1 *)lmm, lmm_bytes,
290 int lsm_unpackmd_v3(struct lov_obd *lov, struct lov_stripe_md *lsm,
291 struct lov_mds_md *lmmv1)
293 struct lov_mds_md_v3 *lmm;
294 struct lov_oinfo *loi;
296 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
298 lmm = (struct lov_mds_md_v3 *)lmmv1;
300 lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm);
301 strncpy(lsm->lsm_pool_name, lmm->lmm_pool_name, LOV_MAXPOOLNAME);
303 for (i = 0; i < lsm->lsm_stripe_count; i++) {
304 /* XXX LOV STACKING call down to osc_unpackmd() */
305 loi = lsm->lsm_oinfo[i];
306 loi->loi_id = le64_to_cpu(lmm->lmm_objects[i].l_object_id);
307 loi->loi_seq = le64_to_cpu(lmm->lmm_objects[i].l_object_seq);
308 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
309 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
310 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
311 CERROR("OST index %d more than OST count %d\n",
312 loi->loi_ost_idx, lov->desc.ld_tgt_count);
313 lov_dump_lmm_v3(D_WARNING, lmm);
316 if (!lov->lov_tgts[loi->loi_ost_idx]) {
317 CERROR("OST index %d missing\n", loi->loi_ost_idx);
318 lov_dump_lmm_v3(D_WARNING, lmm);
321 /* calculate the minimum stripe max bytes */
322 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
326 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
331 const struct lsm_operations lsm_v3_ops = {
332 .lsm_free = lsm_free_plain,
333 .lsm_destroy = lsm_destroy_plain,
334 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
335 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
336 .lsm_lmm_verify = lsm_lmm_verify_v3,
337 .lsm_unpackmd = lsm_unpackmd_v3,