1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
40 * Author: Wang Di <wangdi@clusterfs.com>
44 # define EXPORT_SYMTAB
46 #define DEBUG_SUBSYSTEM S_LOV
49 #include <asm/div64.h>
50 #include <libcfs/libcfs.h>
52 #include <liblustre.h>
55 #include <obd_class.h>
57 #include <lustre/lustre_idl.h>
58 #include <lustre_log.h>
60 #include "lov_internal.h"
62 struct lovea_unpack_args {
63 struct lov_stripe_md *lsm;
67 static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes,
71 if (stripe_count == 0 || stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
72 CERROR("bad stripe count %d\n", stripe_count);
73 lov_dump_lmm(D_WARNING, lmm);
77 if (lmm->lmm_object_id == 0) {
78 CERROR("zero object id\n");
79 lov_dump_lmm(D_WARNING, lmm);
83 if (lmm->lmm_pattern != cpu_to_le32(LOV_PATTERN_RAID0)) {
84 CERROR("bad striping pattern\n");
85 lov_dump_lmm(D_WARNING, lmm);
89 if (lmm->lmm_stripe_size == 0 ||
90 (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) {
91 CERROR("bad stripe size %u\n",
92 le32_to_cpu(lmm->lmm_stripe_size));
93 lov_dump_lmm(D_WARNING, lmm);
99 struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
101 struct lov_stripe_md *lsm;
102 struct lov_oinfo *loi;
103 int i, oinfo_ptrs_size;
105 LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);
107 oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count;
108 *size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size;
110 OBD_ALLOC_LARGE(lsm, *size);
114 for (i = 0; i < stripe_count; i++) {
115 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, CFS_ALLOC_IO);
118 lsm->lsm_oinfo[i] = loi;
120 lsm->lsm_stripe_count = stripe_count;
125 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi));
126 OBD_FREE_LARGE(lsm, *size);
130 void lsm_free_plain(struct lov_stripe_md *lsm)
132 __u16 stripe_count = lsm->lsm_stripe_count;
135 for (i = 0; i < stripe_count; i++)
136 OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab,
137 sizeof(struct lov_oinfo));
138 OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) +
139 stripe_count * sizeof(struct lov_oinfo *));
142 static void lsm_unpackmd_common(struct lov_stripe_md *lsm,
143 struct lov_mds_md *lmm)
146 * This supposes lov_mds_md_v1/v3 first fields are
149 lsm->lsm_object_id = le64_to_cpu(lmm->lmm_object_id);
150 lsm->lsm_object_seq = le64_to_cpu(lmm->lmm_object_seq);
151 lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
152 lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
153 lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
154 lsm->lsm_pool_name[0] = '\0';
158 lsm_stripe_by_index_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;
166 lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno,
167 obd_off *lov_off, obd_off *swidth)
170 *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count;
173 static int lsm_destroy_plain(struct lov_stripe_md *lsm, struct obdo *oa,
174 struct obd_export *md_exp)
179 /* Find minimum stripe maxbytes value. For inactive or
180 * reconnecting targets use LUSTRE_STRIPE_MAXBYTES. */
181 static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes)
183 struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;
185 if (imp == NULL || !tgt->ltd_active) {
186 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
190 cfs_spin_lock(&imp->imp_lock);
191 if (imp->imp_state == LUSTRE_IMP_FULL &&
192 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) &&
193 imp->imp_connect_data.ocd_maxbytes > 0) {
194 if (*stripe_maxbytes > imp->imp_connect_data.ocd_maxbytes)
195 *stripe_maxbytes = imp->imp_connect_data.ocd_maxbytes;
197 *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
199 cfs_spin_unlock(&imp->imp_lock);
202 static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
205 if (lmm_bytes < sizeof(*lmm)) {
206 CERROR("lov_mds_md_v1 too small: %d, need at least %d\n",
207 lmm_bytes, (int)sizeof(*lmm));
211 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
213 if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) {
214 CERROR("LOV EA V1 too small: %d, need %d\n",
215 lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1));
216 lov_dump_lmm_v1(D_WARNING, lmm);
220 return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count);
223 int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
224 struct lov_mds_md_v1 *lmm)
226 struct lov_oinfo *loi;
228 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
230 lsm_unpackmd_common(lsm, lmm);
232 for (i = 0; i < lsm->lsm_stripe_count; i++) {
233 /* XXX LOV STACKING call down to osc_unpackmd() */
234 loi = lsm->lsm_oinfo[i];
235 loi->loi_id = le64_to_cpu(lmm->lmm_objects[i].l_object_id);
236 loi->loi_seq = le64_to_cpu(lmm->lmm_objects[i].l_object_seq);
237 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
238 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
239 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
240 CERROR("OST index %d more than OST count %d\n",
241 loi->loi_ost_idx, lov->desc.ld_tgt_count);
242 lov_dump_lmm_v1(D_WARNING, lmm);
245 if (!lov->lov_tgts[loi->loi_ost_idx]) {
246 CERROR("OST index %d missing\n", loi->loi_ost_idx);
247 lov_dump_lmm_v1(D_WARNING, lmm);
250 /* calculate the minimum stripe max bytes */
251 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
255 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
260 const struct lsm_operations lsm_v1_ops = {
261 .lsm_free = lsm_free_plain,
262 .lsm_destroy = lsm_destroy_plain,
263 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
264 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
265 .lsm_lmm_verify = lsm_lmm_verify_v1,
266 .lsm_unpackmd = lsm_unpackmd_v1,
269 static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes,
272 struct lov_mds_md_v3 *lmm;
274 lmm = (struct lov_mds_md_v3 *)lmmv1;
276 if (lmm_bytes < sizeof(*lmm)) {
277 CERROR("lov_mds_md_v3 too small: %d, need at least %d\n",
278 lmm_bytes, (int)sizeof(*lmm));
282 *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
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_v3(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;
301 __u64 stripe_maxbytes = OBD_OBJECT_EOF;
303 lmm = (struct lov_mds_md_v3 *)lmmv1;
305 lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm);
306 strncpy(lsm->lsm_pool_name, lmm->lmm_pool_name, LOV_MAXPOOLNAME);
308 for (i = 0; i < lsm->lsm_stripe_count; i++) {
309 /* XXX LOV STACKING call down to osc_unpackmd() */
310 loi = lsm->lsm_oinfo[i];
311 loi->loi_id = le64_to_cpu(lmm->lmm_objects[i].l_object_id);
312 loi->loi_seq = le64_to_cpu(lmm->lmm_objects[i].l_object_seq);
313 loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
314 loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
315 if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) {
316 CERROR("OST index %d more than OST count %d\n",
317 loi->loi_ost_idx, lov->desc.ld_tgt_count);
318 lov_dump_lmm_v3(D_WARNING, lmm);
321 if (!lov->lov_tgts[loi->loi_ost_idx]) {
322 CERROR("OST index %d missing\n", loi->loi_ost_idx);
323 lov_dump_lmm_v3(D_WARNING, lmm);
326 /* calculate the minimum stripe max bytes */
327 lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx],
331 lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count;
336 const struct lsm_operations lsm_v3_ops = {
337 .lsm_free = lsm_free_plain,
338 .lsm_destroy = lsm_destroy_plain,
339 .lsm_stripe_by_index = lsm_stripe_by_index_plain,
340 .lsm_stripe_by_offset = lsm_stripe_by_offset_plain,
341 .lsm_lmm_verify = lsm_lmm_verify_v3,
342 .lsm_unpackmd = lsm_unpackmd_v3,