1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
5 * Author: Andreas Dilger <adilger@clusterfs.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or
10 * modify it under the terms of version 2 of the GNU General Public
11 * License as published by the Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Lustre; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * (Un)packing of OST/MDS requests
26 #define DEBUG_SUBSYSTEM S_LOV
28 #include <liblustre.h>
31 #include <lustre_net.h>
34 #include <obd_class.h>
35 #include <obd_support.h>
36 #include <lustre/lustre_user.h>
38 #include "lov_internal.h"
40 void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm)
42 struct lov_ost_data_v1 *lod;
45 CDEBUG(level, "objid "LPX64", magic 0x%08x, pattern %#x\n",
46 le64_to_cpu(lmm->lmm_object_id), le32_to_cpu(lmm->lmm_magic),
47 le32_to_cpu(lmm->lmm_pattern));
48 CDEBUG(level,"stripe_size %u, stripe_count %u\n",
49 le32_to_cpu(lmm->lmm_stripe_size),
50 le32_to_cpu(lmm->lmm_stripe_count));
52 if (le32_to_cpu(lmm->lmm_stripe_count) <= LOV_V1_INSANE_STRIPE_COUNT) {
53 for (i = 0, lod = lmm->lmm_objects;
54 i < (int)le32_to_cpu(lmm->lmm_stripe_count); i++, lod++)
56 "stripe %u idx %u subobj "LPX64"/"LPX64"\n",
57 i, le32_to_cpu(lod->l_ost_idx),
58 le64_to_cpu(lod->l_object_gr),
59 le64_to_cpu(lod->l_object_id));
61 CDEBUG(level, "bad stripe_count %u > max_stripe_count %u\n",
62 le32_to_cpu(lmm->lmm_stripe_count),
63 LOV_V1_INSANE_STRIPE_COUNT);
67 void lov_dump_lmm_join(int level, struct lov_mds_md_join *lmmj)
70 CDEBUG(level, "objid "LPX64", magic 0x%08X, pattern %#X\n",
71 le64_to_cpu(lmmj->lmmj_md.lmm_object_id),
72 le32_to_cpu(lmmj->lmmj_md.lmm_magic),
73 le32_to_cpu(lmmj->lmmj_md.lmm_pattern));
74 CDEBUG(level,"stripe_size %u, stripe_count %u extent_count %u \n",
75 le32_to_cpu(lmmj->lmmj_md.lmm_stripe_size),
76 le32_to_cpu(lmmj->lmmj_md.lmm_stripe_count),
77 le32_to_cpu(lmmj->lmmj_extent_count));
80 #define LMM_ASSERT(test) \
82 if (!(test)) lov_dump_lmm(D_ERROR, lmm); \
83 LASSERT(test); /* so we know what assertion failed */ \
86 /* Pack LOV object metadata for disk storage. It is packed in LE byte
87 * order and is opaque to the networking layer.
89 * XXX In the future, this will be enhanced to get the EA size from the
90 * underlying OSC device(s) to get their EA sizes so we can stack
91 * LOVs properly. For now lov_mds_md_size() just assumes one obd_id
94 int lov_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
95 struct lov_stripe_md *lsm)
97 struct obd_device *obd = class_exp2obd(exp);
98 struct lov_obd *lov = &obd->u.lov;
99 struct lov_oinfo *loi;
100 struct lov_mds_md *lmm;
101 int stripe_count = lov->desc.ld_tgt_count;
107 if (lsm->lsm_magic != LOV_MAGIC) {
108 CERROR("bad mem LOV MAGIC: 0x%08X != 0x%08X\n",
109 lsm->lsm_magic, LOV_MAGIC);
113 stripe_count = lov_get_stripecnt(lov, lsm->lsm_stripe_count);
114 lsm->lsm_stripe_count = stripe_count;
116 stripe_count = lsm->lsm_stripe_count;
120 /* XXX LOV STACKING call into osc for sizes */
121 lmm_size = lov_mds_md_size(stripe_count);
127 stripe_count = le32_to_cpu((*lmmp)->lmm_stripe_count);
128 OBD_FREE(*lmmp, lov_mds_md_size(stripe_count));
134 OBD_ALLOC(*lmmp, lmm_size);
140 lmm->lmm_magic = cpu_to_le32(LOV_MAGIC); /* only write new format */
145 lmm->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
146 lmm->lmm_object_gr = cpu_to_le64(lsm->lsm_object_gr);
147 lmm->lmm_stripe_size = cpu_to_le32(lsm->lsm_stripe_size);
148 lmm->lmm_stripe_count = cpu_to_le32(stripe_count);
149 lmm->lmm_pattern = cpu_to_le32(lsm->lsm_pattern);
151 for (i = 0; i < stripe_count; i++) {
152 loi = lsm->lsm_oinfo[i];
153 /* XXX LOV STACKING call down to osc_packmd() to do packing */
154 LASSERTF(loi->loi_id, "lmm_oid "LPU64" stripe %u/%u idx %u\n",
155 lmm->lmm_object_id, i, stripe_count, loi->loi_ost_idx);
156 lmm->lmm_objects[i].l_object_id = cpu_to_le64(loi->loi_id);
157 lmm->lmm_objects[i].l_object_gr = cpu_to_le64(loi->loi_gr);
158 lmm->lmm_objects[i].l_ost_gen = cpu_to_le32(loi->loi_ost_gen);
159 lmm->lmm_objects[i].l_ost_idx = cpu_to_le32(loi->loi_ost_idx);
165 /* Find the max stripecount we should use */
166 int lov_get_stripecnt(struct lov_obd *lov, __u32 stripe_count)
169 stripe_count = lov->desc.ld_default_stripe_count;
170 if (stripe_count > lov->desc.ld_active_tgt_count)
171 stripe_count = lov->desc.ld_active_tgt_count;
174 /* for now, we limit the stripe count directly, when bug 4424 is
175 * fixed this needs to be somewhat dynamic based on whether ext3
176 * can handle larger EA sizes. */
177 if (stripe_count > LOV_MAX_STRIPE_COUNT)
178 stripe_count = LOV_MAX_STRIPE_COUNT;
184 static int lov_verify_lmm(void *lmm, int lmm_bytes, int *stripe_count)
188 if (lsm_op_find(le32_to_cpu(*(__u32 *)lmm)) == NULL) {
189 CERROR("bad disk LOV MAGIC: 0x%08X; dumping V1 LMM:\n",
190 le32_to_cpu(*(__u32 *)lmm));
191 lov_dump_lmm_v1(D_WARNING, lmm);
194 rc = lsm_op_find(le32_to_cpu(*(__u32 *)lmm))->lsm_lmm_verify(lmm,
195 lmm_bytes, stripe_count);
199 int lov_alloc_memmd(struct lov_stripe_md **lsmp, int stripe_count,
200 int pattern, int magic)
205 CDEBUG(D_INFO, "alloc lsm, stripe_count %d\n", stripe_count);
207 *lsmp = lsm_alloc_plain(stripe_count, &lsm_size);
209 CERROR("can't allocate lsmp, stripe_count %d\n", stripe_count);
213 spin_lock_init(&(*lsmp)->lsm_lock);
214 (*lsmp)->lsm_magic = magic;
215 (*lsmp)->lsm_stripe_count = stripe_count;
216 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES * stripe_count;
217 (*lsmp)->lsm_pattern = pattern;
218 (*lsmp)->lsm_oinfo[0]->loi_ost_idx = ~0;
220 for (i = 0; i < stripe_count; i++)
221 loi_init((*lsmp)->lsm_oinfo[i]);
226 void lov_free_memmd(struct lov_stripe_md **lsmp)
228 struct lov_stripe_md *lsm = *lsmp;
230 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
231 lsm_op_find(lsm->lsm_magic)->lsm_free(lsm);
237 /* Unpack LOV object metadata from disk storage. It is packed in LE byte
238 * order and is opaque to the networking layer.
240 int lov_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
241 struct lov_mds_md *lmm, int lmm_bytes)
243 struct obd_device *obd = class_exp2obd(exp);
244 struct lov_obd *lov = &obd->u.lov;
245 int rc = 0, stripe_count, lsm_size;
249 /* If passed an MDS struct use values from there, otherwise defaults */
251 rc = lov_verify_lmm(lmm, lmm_bytes, &stripe_count);
254 magic = le32_to_cpu(lmm->lmm_magic);
256 stripe_count = lov_get_stripecnt(lov, 0);
260 /* If we aren't passed an lsmp struct, we just want the size */
262 /* XXX LOV STACKING call into osc for sizes */
264 RETURN(lov_stripe_md_size(stripe_count));
267 /* If we are passed an allocated struct but nothing to unpack, free */
269 lov_free_memmd(lsmp);
273 lsm_size = lov_alloc_memmd(lsmp, stripe_count, LOV_PATTERN_RAID0,
278 /* If we are passed a pointer but nothing to unpack, we only alloc */
282 LASSERT(lsm_op_find(magic) != NULL);
283 rc = lsm_op_find(magic)->lsm_unpackmd(lov, *lsmp, lmm);
285 lov_free_memmd(lsmp);
292 /* Configure object striping information on a new file.
294 * @lmmu is a pointer to a user struct with one or more of the fields set to
295 * indicate the application preference: lmm_stripe_count, lmm_stripe_size,
296 * lmm_stripe_offset, and lmm_stripe_pattern. lmm_magic must be LOV_MAGIC.
297 * @lsmp is a pointer to an in-core stripe MD that needs to be filled in.
299 int lov_setstripe(struct obd_export *exp, struct lov_stripe_md **lsmp,
300 struct lov_user_md *lump)
302 struct obd_device *obd = class_exp2obd(exp);
303 struct lov_obd *lov = &obd->u.lov;
304 struct lov_user_md lum;
309 rc = copy_from_user(&lum, lump, sizeof(lum));
313 if (lum.lmm_magic != LOV_USER_MAGIC) {
314 if (lum.lmm_magic == __swab32(LOV_USER_MAGIC)) {
315 lustre_swab_lov_user_md(&lum);
317 CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
319 lum.lmm_magic, LOV_USER_MAGIC);
324 if (lum.lmm_pattern == 0) {
325 lum.lmm_pattern = lov->desc.ld_pattern ?
326 lov->desc.ld_pattern : LOV_PATTERN_RAID0;
329 if (lum.lmm_pattern != LOV_PATTERN_RAID0) {
330 CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n",
335 /* 64kB is the largest common page size we see (ia64), and matches the
337 if (lum.lmm_stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
338 CDEBUG(D_IOCTL, "stripe size %u not multiple of %u, fixing\n",
339 lum.lmm_stripe_size, LOV_MIN_STRIPE_SIZE);
340 lum.lmm_stripe_size = LOV_MIN_STRIPE_SIZE;
343 if ((lum.lmm_stripe_offset >= lov->desc.ld_tgt_count) &&
344 (lum.lmm_stripe_offset != (typeof(lum.lmm_stripe_offset))(-1))) {
345 CDEBUG(D_IOCTL, "stripe offset %u > number of OSTs %u\n",
346 lum.lmm_stripe_offset, lov->desc.ld_tgt_count);
349 stripe_count = lov_get_stripecnt(lov, lum.lmm_stripe_count);
351 if ((__u64)lum.lmm_stripe_size * stripe_count > ~0U) {
352 CDEBUG(D_IOCTL, "stripe width %ux%u exceeds %u bytes\n",
353 lum.lmm_stripe_size, (int)lum.lmm_stripe_count, ~0U);
357 rc = lov_alloc_memmd(lsmp, stripe_count, lum.lmm_pattern, LOV_MAGIC);
362 (*lsmp)->lsm_oinfo[0]->loi_ost_idx = lum.lmm_stripe_offset;
363 (*lsmp)->lsm_stripe_size = lum.lmm_stripe_size;
368 int lov_setea(struct obd_export *exp, struct lov_stripe_md **lsmp,
369 struct lov_user_md *lump)
373 struct obd_export *oexp;
374 struct lov_obd *lov = &exp->exp_obd->u.lov;
378 for (i = 0; i < lump->lmm_stripe_count; i++) {
379 __u32 len = sizeof(last_id);
380 oexp = lov->lov_tgts[lump->lmm_objects[i].l_ost_idx]->ltd_exp;
381 rc = obd_get_info(oexp, strlen("last_id"), "last_id",
385 if (lump->lmm_objects[i].l_object_id > last_id) {
386 CERROR("Setting EA for object > than last id on "
387 "ost idx %d "LPD64" > "LPD64" \n",
388 lump->lmm_objects[i].l_ost_idx,
389 lump->lmm_objects[i].l_object_id, last_id);
394 rc = lov_setstripe(exp, lsmp, lump);
398 for (i = 0; i < lump->lmm_stripe_count; i++) {
399 (*lsmp)->lsm_oinfo[i]->loi_ost_idx =
400 lump->lmm_objects[i].l_ost_idx;
401 (*lsmp)->lsm_oinfo[i]->loi_id = lump->lmm_objects[i].l_object_id;
402 (*lsmp)->lsm_oinfo[i]->loi_gr = lump->lmm_objects[i].l_object_gr;
408 /* Retrieve object striping information.
410 * @lump is a pointer to an in-core struct with lmm_ost_count indicating
411 * the maximum number of OST indices which will fit in the user buffer.
412 * lmm_magic must be LOV_USER_MAGIC.
414 int lov_getstripe(struct obd_export *exp, struct lov_stripe_md *lsm,
415 struct lov_user_md *lump)
417 struct lov_user_md lum;
418 struct lov_mds_md *lmmk = NULL;
425 rc = copy_from_user(&lum, lump, sizeof(lum));
429 if (lum.lmm_magic != LOV_USER_MAGIC)
432 rc = lov_packmd(exp, &lmmk, lsm);
438 /* FIXME: Bug 1185 - copy fields properly when structs change */
439 LASSERT(sizeof(lum) == sizeof(*lmmk));
440 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lmmk->lmm_objects[0]));
442 /* User wasn't expecting this many OST entries */
443 if (lum.lmm_stripe_count == 0) {
444 if (copy_to_user(lump, lmmk, sizeof(lum)))
446 } else if (lum.lmm_stripe_count < lmmk->lmm_stripe_count) {
448 } else if (copy_to_user(lump, lmmk, lmm_size)) {
452 obd_free_diskmd(exp, &lmmk);