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, 2013, Intel Corporation.
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>
54 #include "lov_internal.h"
56 static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
59 if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
60 CERROR("bad stripe count %d\n", stripe_count);
61 lov_dump_lmm_common(D_WARNING, lmm);
65 if (lmm_oi_id(&lmm->lmm_oi) == 0) {
66 CERROR("zero object id\n");
67 lov_dump_lmm_common(D_WARNING, lmm);
71 if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) {
72 CERROR("bad striping pattern\n");
73 lov_dump_lmm_common(D_WARNING, lmm);
77 if (lmm->lmm_stripe_size == 0 ||
78 (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
79 CERROR("bad stripe size %u\n",
80 le32_to_cpu(lmm->lmm_stripe_size));
81 lov_dump_lmm_common(D_WARNING, lmm);
87 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
89 struct lov_stripe_md *lsm;
90 struct lov_oinfo *loi;
91 int i, oinfo_ptrs_size;
93 LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);
95 oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
96 *size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;
98 OBD_ALLOC_LARGE(lsm, *size);
102 for (i = 0; i < stripe_count; i++) {
103 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
106 lsm->lsm_oinfo[i] = loi;
108 lsm->lsm_stripe_count = stripe_count;
113 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
114 OBD_FREE_LARGE(lsm, *size);
118 void lsm_free_plain(struct lov_stripe_md *lsm)
120 __u16 stripe_count = lsm->lsm_stripe_count;
123 for (i = 0; i < stripe_count; i++)
124 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
125 sizeof(struct lov_oinfo));
126 OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) +
127 stripe_count * sizeof(struct lov_oinfo *));
130 static void lsm_unpackmd_common(struct lov_stripe_md *lsm,
131 struct lov_mds_md *lmm)
134 * This supposes lov_mds_md_v1/v3 first fields are
137 lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi);
138 lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
139 lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
140 lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
141 lsm->lsm_pool_name[0] = '\0';
145 lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno,
146 obd_off *lov_off, obd_off *swidth)
149 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
153 lsm_stripe_by_offset_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;
160 static int lsm_destroy_plain(struct lov_stripe_md *lsm, struct obdo *oa,
161 struct obd_export *md_exp)
166 /* Find minimum stripe maxbytes value. For inactive or
167 * reconnecting targets use LUSTRE_STRIPE_MAXBYTES. */
168 static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes)
170 struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;
172 if (imp == NULL || !tgt->ltd_active) {
173 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
177 spin_lock(&imp->imp_lock);
178 if (imp->imp_state == LUSTRE_IMP_FULL &&
179 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
180 imp->imp_connect_data.ocd_maxbytes > 0) {
181 if (*stripe_maxbytes > imp->imp_connect_data.ocd_maxbytes)
182 *stripe_maxbytes = imp->imp_connect_data.ocd_maxbytes;
184 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
186 spin_unlock(&imp->imp_lock);
189 static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
192 if (lmm_bytes < sizeof(*lmm)) {
193 CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
194 lmm_bytes, (int)sizeof(*lmm));
198 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
199 if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
202 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
203 CERROR("LOV EA V1 too small: %d, need %d\n",
204 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
205 lov_dump_lmm_common(D_WARNING, lmm);
209 return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
212 int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
213 struct lov_mds_md_v1 *lmm)
215 struct lov_oinfo *loi;
218 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
220 lsm_unpackmd_common(lsm, lmm);
222 stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
224 for (i = 0; i < stripe_count; i++) {
225 /* XXX LOV STACKING call down to osc_unpackmd() */
226 loi = lsm->lsm_oinfo[i];
227 ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
228 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
229 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
230 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
231 CERROR("OST index %d more than OST count %d\n",
232 loi->loi_ost_idx, lov->desc.ld_tgt_count);
233 lov_dump_lmm_v1(D_WARNING, lmm);
236 if (!lov->lov_tgts[loi->loi_ost_idx]) {
237 CERROR("OST index %d missing\n", loi->loi_ost_idx);
238 lov_dump_lmm_v1(D_WARNING, lmm);
241 /* calculate the minimum stripe max bytes */
242 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
246 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
247 if (lsm->lsm_stripe_count == 0)
248 lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
253 const struct lsm_operations lsm_v1_ops = {
254 .lsm_free = lsm_free_plain,
255 .lsm_destroy = lsm_destroy_plain,
256 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
257 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
258 .lsm_lmm_verify = lsm_lmm_verify_v1,
259 .lsm_unpackmd = lsm_unpackmd_v1,
262 static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
265 struct lov_mds_md_v3 *lmm;
267 lmm = (struct lov_mds_md_v3 *)lmmv1;
269 if (lmm_bytes < sizeof(*lmm)) {
270 CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
271 lmm_bytes, (int)sizeof(*lmm));
275 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
276 if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
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_common(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;
297 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
300 lmm = (struct lov_mds_md_v3 *)lmmv1;
302 lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm);
304 stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
306 cplen = strlcpy(lsm->lsm_pool_name, lmm->lmm_pool_name,
307 sizeof(lsm->lsm_pool_name));
308 if (cplen >= sizeof(lsm->lsm_pool_name))
311 for (i = 0; i < stripe_count; i++) {
312 /* XXX LOV STACKING call down to osc_unpackmd() */
313 loi = lsm->lsm_oinfo[i];
314 ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
315 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
316 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
317 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
318 CERROR("OST index %d more than OST count %d\n",
319 loi->loi_ost_idx, lov->desc.ld_tgt_count);
320 lov_dump_lmm_v3(D_WARNING, lmm);
323 if (!lov->lov_tgts[loi->loi_ost_idx]) {
324 CERROR("OST index %d missing\n", loi->loi_ost_idx);
325 lov_dump_lmm_v3(D_WARNING, lmm);
328 /* calculate the minimum stripe max bytes */
329 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
333 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
334 if (lsm->lsm_stripe_count == 0)
335 lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
340 const struct lsm_operations lsm_v3_ops = {
341 .lsm_free = lsm_free_plain,
342 .lsm_destroy = lsm_destroy_plain,
343 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
344 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
345 .lsm_lmm_verify = lsm_lmm_verify_v3,
346 .lsm_unpackmd = lsm_unpackmd_v3,