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 struct lovea_unpack_args {
57 struct lov_stripe_md *lsm;
61 static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
64 if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
65 CERROR("bad stripe count %d\n", stripe_count);
66 lov_dump_lmm_common(D_WARNING, lmm);
70 if (lmm_oi_id(&lmm->lmm_oi) == 0) {
71 CERROR("zero object id\n");
72 lov_dump_lmm_common(D_WARNING, lmm);
76 if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) {
77 CERROR("bad striping pattern\n");
78 lov_dump_lmm_common(D_WARNING, lmm);
82 if (lmm->lmm_stripe_size == 0 ||
83 (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
84 CERROR("bad stripe size %u\n",
85 le32_to_cpu(lmm->lmm_stripe_size));
86 lov_dump_lmm_common(D_WARNING, lmm);
92 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
94 struct lov_stripe_md *lsm;
95 struct lov_oinfo *loi;
96 int i, oinfo_ptrs_size;
98 LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);
100 oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
101 *size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;
103 OBD_ALLOC_LARGE(lsm, *size);
107 for (i = 0; i < stripe_count; i++) {
108 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, __GFP_IO);
111 lsm->lsm_oinfo[i] = loi;
113 lsm->lsm_stripe_count = stripe_count;
118 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
119 OBD_FREE_LARGE(lsm, *size);
123 void lsm_free_plain(struct lov_stripe_md *lsm)
125 __u16 stripe_count = lsm->lsm_stripe_count;
128 for (i = 0; i < stripe_count; i++)
129 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
130 sizeof(struct lov_oinfo));
131 OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) +
132 stripe_count * sizeof(struct lov_oinfo *));
135 static void lsm_unpackmd_common(struct lov_stripe_md *lsm,
136 struct lov_mds_md *lmm)
139 * This supposes lov_mds_md_v1/v3 first fields are
142 lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi);
143 lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
144 lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
145 lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
146 lsm->lsm_pool_name[0] = '\0';
150 lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno,
151 obd_off *lov_off, obd_off *swidth)
154 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
158 lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno,
159 obd_off *lov_off, obd_off *swidth)
162 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
165 static int lsm_destroy_plain(struct lov_stripe_md *lsm, struct obdo *oa,
166 struct obd_export *md_exp)
171 /* Find minimum stripe maxbytes value. For inactive or
172 * reconnecting targets use LUSTRE_STRIPE_MAXBYTES. */
173 static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes)
175 struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;
177 if (imp == NULL || !tgt->ltd_active) {
178 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
182 spin_lock(&imp->imp_lock);
183 if (imp->imp_state == LUSTRE_IMP_FULL &&
184 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
185 imp->imp_connect_data.ocd_maxbytes > 0) {
186 if (*stripe_maxbytes > imp->imp_connect_data.ocd_maxbytes)
187 *stripe_maxbytes = imp->imp_connect_data.ocd_maxbytes;
189 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
191 spin_unlock(&imp->imp_lock);
194 static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
197 if (lmm_bytes < sizeof(*lmm)) {
198 CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
199 lmm_bytes, (int)sizeof(*lmm));
203 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
204 if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
207 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
208 CERROR("LOV EA V1 too small: %d, need %d\n",
209 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
210 lov_dump_lmm_common(D_WARNING, lmm);
214 return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
217 int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
218 struct lov_mds_md_v1 *lmm)
220 struct lov_oinfo *loi;
223 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
225 lsm_unpackmd_common(lsm, lmm);
227 stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
229 for (i = 0; i < stripe_count; i++) {
230 /* XXX LOV STACKING call down to osc_unpackmd() */
231 loi = lsm->lsm_oinfo[i];
232 ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
233 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
234 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
235 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
236 CERROR("OST index %d more than OST count %d\n",
237 loi->loi_ost_idx, lov->desc.ld_tgt_count);
238 lov_dump_lmm_v1(D_WARNING, lmm);
241 if (!lov->lov_tgts[loi->loi_ost_idx]) {
242 CERROR("OST index %d missing\n", loi->loi_ost_idx);
243 lov_dump_lmm_v1(D_WARNING, lmm);
246 /* calculate the minimum stripe max bytes */
247 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
251 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
252 if (lsm->lsm_stripe_count == 0)
253 lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
258 const struct lsm_operations lsm_v1_ops = {
259 .lsm_free = lsm_free_plain,
260 .lsm_destroy = lsm_destroy_plain,
261 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
262 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
263 .lsm_lmm_verify = lsm_lmm_verify_v1,
264 .lsm_unpackmd = lsm_unpackmd_v1,
267 static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
270 struct lov_mds_md_v3 *lmm;
272 lmm = (struct lov_mds_md_v3 *)lmmv1;
274 if (lmm_bytes < sizeof(*lmm)) {
275 CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
276 lmm_bytes, (int)sizeof(*lmm));
280 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
281 if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
284 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)) {
285 CERROR("LOV EA V3 too small: %d, need %d\n",
286 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V3));
287 lov_dump_lmm_common(D_WARNING, lmm);
291 return lsm_lmm_verify_common((struct lov_mds_md_v1 *)lmm, lmm_bytes,
295 int lsm_unpackmd_v3(struct lov_obd *lov, struct lov_stripe_md *lsm,
296 struct lov_mds_md *lmmv1)
298 struct lov_mds_md_v3 *lmm;
299 struct lov_oinfo *loi;
302 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
305 lmm = (struct lov_mds_md_v3 *)lmmv1;
307 lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm);
309 stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count;
311 cplen = strlcpy(lsm->lsm_pool_name, lmm->lmm_pool_name,
312 sizeof(lsm->lsm_pool_name));
313 if (cplen >= sizeof(lsm->lsm_pool_name))
316 for (i = 0; i < stripe_count; i++) {
317 /* XXX LOV STACKING call down to osc_unpackmd() */
318 loi = lsm->lsm_oinfo[i];
319 ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi);
320 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
321 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
322 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
323 CERROR("OST index %d more than OST count %d\n",
324 loi->loi_ost_idx, lov->desc.ld_tgt_count);
325 lov_dump_lmm_v3(D_WARNING, lmm);
328 if (!lov->lov_tgts[loi->loi_ost_idx]) {
329 CERROR("OST index %d missing\n", loi->loi_ost_idx);
330 lov_dump_lmm_v3(D_WARNING, lmm);
333 /* calculate the minimum stripe max bytes */
334 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
338 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
339 if (lsm->lsm_stripe_count == 0)
340 lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count;
345 const struct lsm_operations lsm_v3_ops = {
346 .lsm_free = lsm_free_plain,
347 .lsm_destroy = lsm_destroy_plain,
348 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
349 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
350 .lsm_lmm_verify = lsm_lmm_verify_v3,
351 .lsm_unpackmd = lsm_unpackmd_v3,