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, 2014, 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
43 #include <linux/math64.h>
44 #include <libcfs/libcfs.h>
46 #include <obd_class.h>
47 #include <lustre/lustre_idl.h>
49 #include "lov_internal.h"
51 static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
54 if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
55 CERROR("bad stripe count %d\n", stripe_count);
56 lov_dump_lmm_common(D_WARNING, lmm);
60 if (lmm_oi_id(&lmm->lmm_oi) == 0) {
61 CERROR("zero object id\n");
62 lov_dump_lmm_common(D_WARNING, lmm);
66 if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) {
67 CERROR("bad striping pattern\n");
68 lov_dump_lmm_common(D_WARNING, lmm);
72 if (lmm->lmm_stripe_size == 0 ||
73 (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
74 CERROR("bad stripe size %u\n",
75 le32_to_cpu(lmm->lmm_stripe_size));
76 lov_dump_lmm_common(D_WARNING, lmm);
82 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
84 struct lov_stripe_md *lsm;
85 struct lov_oinfo *loi;
86 int i, oinfo_ptrs_size;
88 LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);
90 oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
91 *size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;
93 OBD_ALLOC_LARGE(lsm, *size);
97 for (i = 0; i < stripe_count; i++) {
98 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
101 lsm->lsm_oinfo[i] = loi;
103 lsm->lsm_stripe_count = stripe_count;
108 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
109 OBD_FREE_LARGE(lsm, *size);
113 void lsm_free_plain(struct lov_stripe_md *lsm)
115 __u16 stripe_count = lsm->lsm_stripe_count;
118 for (i = 0; i < stripe_count; i++)
119 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
120 sizeof(struct lov_oinfo));
121 OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) +
122 stripe_count * sizeof(struct lov_oinfo *));
125 /* Find minimum stripe maxbytes value. For inactive or
126 * reconnecting targets use LUSTRE_EXT3_STRIPE_MAXBYTES. */
127 static loff_t lov_tgt_maxbytes(struct lov_tgt_desc *tgt)
129 struct obd_import *imp;
130 loff_t maxbytes = LUSTRE_EXT3_STRIPE_MAXBYTES;
132 if (!tgt->ltd_active)
135 imp = tgt->ltd_obd->u.cli.cl_import;
139 spin_lock(&imp->imp_lock);
140 if (imp->imp_state == LUSTRE_IMP_FULL &&
141 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
142 imp->imp_connect_data.ocd_maxbytes > 0)
143 maxbytes = imp->imp_connect_data.ocd_maxbytes;
145 spin_unlock(&imp->imp_lock);
150 static int lsm_unpackmd_common(struct lov_obd *lov,
151 struct lov_stripe_md *lsm,
152 struct lov_mds_md *lmm,
153 struct lov_ost_data_v1 *objects)
155 struct lov_oinfo *loi;
156 loff_t stripe_maxbytes = LLONG_MAX;
157 unsigned int stripe_count;
161 * This supposes lov_mds_md_v1/v3 first fields are
164 lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi);
165 lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
166 lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
167 lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
168 lsm->lsm_pool_name[0] = '\0';
170 stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
172 for (i = 0; i < stripe_count; i++) {
173 loi = lsm->lsm_oinfo[i];
174 ostid_le_to_cpu(&objects[i].l_ost_oi, &loi->loi_oi);
175 loi->loi_ost_idx = le32_to_cpu(objects[i].l_ost_idx);
176 loi->loi_ost_gen = le32_to_cpu(objects[i].l_ost_gen);
177 if (lov_oinfo_is_dummy(loi))
180 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
181 CERROR("OST index %d more than OST count %d\n",
182 loi->loi_ost_idx, lov->desc.ld_tgt_count);
183 lov_dump_lmm_v1(D_WARNING, lmm);
187 if (!lov->lov_tgts[loi->loi_ost_idx]) {
188 CERROR("OST index %d missing\n", loi->loi_ost_idx);
189 lov_dump_lmm_v1(D_WARNING, lmm);
193 stripe_maxbytes = min_t(loff_t, stripe_maxbytes,
195 lov->lov_tgts[loi->loi_ost_idx]));
198 if (stripe_maxbytes == LLONG_MAX)
199 stripe_maxbytes = LUSTRE_EXT3_STRIPE_MAXBYTES;
201 if (lsm->lsm_stripe_count == 0)
202 lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
204 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
210 lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno,
211 loff_t *lov_off, loff_t *swidth)
214 *swidth = (loff_t)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
218 lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno,
219 loff_t *lov_off, loff_t *swidth)
222 *swidth = (loff_t)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
225 static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
228 if (lmm_bytes < sizeof(*lmm)) {
229 CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
230 lmm_bytes, (int)sizeof(*lmm));
234 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
235 if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
238 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
239 CERROR("LOV EA V1 too small: %d, need %d\n",
240 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
241 lov_dump_lmm_common(D_WARNING, lmm);
245 return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
248 static int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
249 struct lov_mds_md_v1 *lmm)
251 return lsm_unpackmd_common(lov, lsm, lmm, lmm->lmm_objects);
254 const struct lsm_operations lsm_v1_ops = {
255 .lsm_free = lsm_free_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 static int lsm_unpackmd_v3(struct lov_obd *lov, struct lov_stripe_md *lsm,
291 struct lov_mds_md *lmm)
293 struct lov_mds_md_v3 *lmm_v3 = (struct lov_mds_md_v3 *)lmm;
297 rc = lsm_unpackmd_common(lov, lsm, lmm, lmm_v3->lmm_objects);
301 cplen = strlcpy(lsm->lsm_pool_name, lmm_v3->lmm_pool_name,
302 sizeof(lsm->lsm_pool_name));
303 if (cplen >= sizeof(lsm->lsm_pool_name))
309 const struct lsm_operations lsm_v3_ops = {
310 .lsm_free = lsm_free_plain,
311 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
312 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
313 .lsm_lmm_verify = lsm_lmm_verify_v3,
314 .lsm_unpackmd = lsm_unpackmd_v3,
317 void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm)
319 CDEBUG(level, "lsm %p, objid "DOSTID", maxbytes "LPX64", magic 0x%08X,"
320 " stripe_size %u, stripe_count %u, refc: %d,"
321 " layout_gen %u, pool ["LOV_POOLNAMEF"]\n", lsm,
322 POSTID(&lsm->lsm_oi), lsm->lsm_maxbytes, lsm->lsm_magic,
323 lsm->lsm_stripe_size, lsm->lsm_stripe_count,
324 atomic_read(&lsm->lsm_refc), lsm->lsm_layout_gen,