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, 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,
65 if (stripe_count == 0 || stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
66 CERROR("bad stripe count %d\n", stripe_count);
67 lov_dump_lmm(D_WARNING, lmm);
71 if (lmm->lmm_object_id == 0) {
72 CERROR("zero object id\n");
73 lov_dump_lmm(D_WARNING, lmm);
77 if (lmm->lmm_pattern != cpu_to_le32(LOV_PATTERN_RAID0)) {
78 CERROR("bad striping pattern\n");
79 lov_dump_lmm(D_WARNING, lmm);
83 if (lmm->lmm_stripe_size == 0 ||
84 (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
85 CERROR("bad stripe size %u\n",
86 le32_to_cpu(lmm->lmm_stripe_size));
87 lov_dump_lmm(D_WARNING, lmm);
93 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
95 struct lov_stripe_md *lsm;
96 struct lov_oinfo *loi;
97 int i, oinfo_ptrs_size;
99 LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);
101 oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
102 *size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;
104 OBD_ALLOC_LARGE(lsm, *size);
108 for (i = 0; i < stripe_count; i++) {
109 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, CFS_ALLOC_IO);
112 lsm->lsm_oinfo[i] = loi;
114 lsm->lsm_stripe_count = stripe_count;
119 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
120 OBD_FREE_LARGE(lsm, *size);
124 void lsm_free_plain(struct lov_stripe_md *lsm)
126 __u16 stripe_count = lsm->lsm_stripe_count;
129 for (i = 0; i < stripe_count; i++)
130 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
131 sizeof(struct lov_oinfo));
132 OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) +
133 stripe_count * sizeof(struct lov_oinfo *));
136 static void lsm_unpackmd_common(struct lov_stripe_md *lsm,
137 struct lov_mds_md *lmm)
140 * This supposes lov_mds_md_v1/v3 first fields are
143 lsm->lsm_object_id = le64_to_cpu(lmm->lmm_object_id);
144 lsm->lsm_object_seq = le64_to_cpu(lmm->lmm_object_seq);
145 lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
146 lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
147 lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
148 lsm->lsm_pool_name[0] = '\0';
152 lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno,
153 obd_off *lov_off, obd_off *swidth)
156 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
160 lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno,
161 obd_off *lov_off, obd_off *swidth)
164 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
167 static int lsm_destroy_plain(struct lov_stripe_md *lsm, struct obdo *oa,
168 struct obd_export *md_exp)
173 /* Find minimum stripe maxbytes value. For inactive or
174 * reconnecting targets use LUSTRE_STRIPE_MAXBYTES. */
175 static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes)
177 struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;
179 if (imp == NULL || !tgt->ltd_active) {
180 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
184 spin_lock(&imp->imp_lock);
185 if (imp->imp_state == LUSTRE_IMP_FULL &&
186 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
187 imp->imp_connect_data.ocd_maxbytes > 0) {
188 if (*stripe_maxbytes > imp->imp_connect_data.ocd_maxbytes)
189 *stripe_maxbytes = imp->imp_connect_data.ocd_maxbytes;
191 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
193 spin_unlock(&imp->imp_lock);
196 static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
199 if (lmm_bytes < sizeof(*lmm)) {
200 CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
201 lmm_bytes, (int)sizeof(*lmm));
205 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
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_v1(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;
222 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
224 lsm_unpackmd_common(lsm, lmm);
226 for (i = 0; i < lsm->lsm_stripe_count; i++) {
227 /* XXX LOV STACKING call down to osc_unpackmd() */
228 loi = lsm->lsm_oinfo[i];
229 loi->loi_id = le64_to_cpu(lmm->lmm_objects[i].l_object_id);
230 loi->loi_seq = le64_to_cpu(lmm->lmm_objects[i].l_object_seq);
231 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
232 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
233 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
234 CERROR("OST index %d more than OST count %d\n",
235 loi->loi_ost_idx, lov->desc.ld_tgt_count);
236 lov_dump_lmm_v1(D_WARNING, lmm);
239 if (!lov->lov_tgts[loi->loi_ost_idx]) {
240 CERROR("OST index %d missing\n", loi->loi_ost_idx);
241 lov_dump_lmm_v1(D_WARNING, lmm);
244 /* calculate the minimum stripe max bytes */
245 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
249 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
254 const struct lsm_operations lsm_v1_ops = {
255 .lsm_free = lsm_free_plain,
256 .lsm_destroy = lsm_destroy_plain,
257 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
258 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
259 .lsm_lmm_verify = lsm_lmm_verify_v1,
260 .lsm_unpackmd = lsm_unpackmd_v1,
263 static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
266 struct lov_mds_md_v3 *lmm;
268 lmm = (struct lov_mds_md_v3 *)lmmv1;
270 if (lmm_bytes < sizeof(*lmm)) {
271 CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
272 lmm_bytes, (int)sizeof(*lmm));
276 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
278 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)) {
279 CERROR("LOV EA V3 too small: %d, need %d\n",
280 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V3));
281 lov_dump_lmm_v3(D_WARNING, lmm);
285 return lsm_lmm_verify_common((struct lov_mds_md_v1 *)lmm, lmm_bytes,
289 int lsm_unpackmd_v3(struct lov_obd *lov, struct lov_stripe_md *lsm,
290 struct lov_mds_md *lmmv1)
292 struct lov_mds_md_v3 *lmm;
293 struct lov_oinfo *loi;
295 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
297 lmm = (struct lov_mds_md_v3 *)lmmv1;
299 lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm);
300 strncpy(lsm->lsm_pool_name, lmm->lmm_pool_name, LOV_MAXPOOLNAME);
302 for (i = 0; i < lsm->lsm_stripe_count; i++) {
303 /* XXX LOV STACKING call down to osc_unpackmd() */
304 loi = lsm->lsm_oinfo[i];
305 loi->loi_id = le64_to_cpu(lmm->lmm_objects[i].l_object_id);
306 loi->loi_seq = le64_to_cpu(lmm->lmm_objects[i].l_object_seq);
307 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
308 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
309 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
310 CERROR("OST index %d more than OST count %d\n",
311 loi->loi_ost_idx, lov->desc.ld_tgt_count);
312 lov_dump_lmm_v3(D_WARNING, lmm);
315 if (!lov->lov_tgts[loi->loi_ost_idx]) {
316 CERROR("OST index %d missing\n", loi->loi_ost_idx);
317 lov_dump_lmm_v3(D_WARNING, lmm);
320 /* calculate the minimum stripe max bytes */
321 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
325 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
330 const struct lsm_operations lsm_v3_ops = {
331 .lsm_free = lsm_free_plain,
332 .lsm_destroy = lsm_destroy_plain,
333 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
334 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
335 .lsm_lmm_verify = lsm_lmm_verify_v3,
336 .lsm_unpackmd = lsm_unpackmd_v3,