| /* |
| * GPL HEADER START |
| * |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 only, |
| * as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License version 2 for more details (a copy is included |
| * in the LICENSE file that accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License |
| * version 2 along with this program; If not, see |
| * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2011, 2012, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| * |
| * lustre/lov/lov_ea.c |
| * |
| * Author: Wang Di <wangdi@clusterfs.com> |
| */ |
| |
| #define DEBUG_SUBSYSTEM S_LOV |
| |
| #include <asm/div64.h> |
| #include "../../include/linux/libcfs/libcfs.h" |
| |
| #include "../include/obd_class.h" |
| #include "../include/lustre/lustre_idl.h" |
| |
| #include "lov_internal.h" |
| |
| struct lovea_unpack_args { |
| struct lov_stripe_md *lsm; |
| int cursor; |
| }; |
| |
| static int lsm_lmm_verify_common(struct lov_mds_md *lmm, int lmm_bytes, |
| __u16 stripe_count) |
| { |
| if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) { |
| CERROR("bad stripe count %d\n", stripe_count); |
| lov_dump_lmm_common(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| |
| if (lmm_oi_id(&lmm->lmm_oi) == 0) { |
| CERROR("zero object id\n"); |
| lov_dump_lmm_common(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| |
| if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) { |
| CERROR("bad striping pattern\n"); |
| lov_dump_lmm_common(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| |
| if (lmm->lmm_stripe_size == 0 || |
| (le32_to_cpu(lmm->lmm_stripe_size)&(LOV_MIN_STRIPE_SIZE-1)) != 0) { |
| CERROR("bad stripe size %u\n", |
| le32_to_cpu(lmm->lmm_stripe_size)); |
| lov_dump_lmm_common(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size) |
| { |
| struct lov_stripe_md *lsm; |
| struct lov_oinfo *loi; |
| int i, oinfo_ptrs_size; |
| |
| LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT); |
| |
| oinfo_ptrs_size = sizeof(struct lov_oinfo *) * stripe_count; |
| *size = sizeof(struct lov_stripe_md) + oinfo_ptrs_size; |
| |
| OBD_ALLOC_LARGE(lsm, *size); |
| if (!lsm) |
| return NULL; |
| |
| for (i = 0; i < stripe_count; i++) { |
| OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS); |
| if (loi == NULL) |
| goto err; |
| lsm->lsm_oinfo[i] = loi; |
| } |
| lsm->lsm_stripe_count = stripe_count; |
| return lsm; |
| |
| err: |
| while (--i >= 0) |
| OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, sizeof(*loi)); |
| OBD_FREE_LARGE(lsm, *size); |
| return NULL; |
| } |
| |
| void lsm_free_plain(struct lov_stripe_md *lsm) |
| { |
| __u16 stripe_count = lsm->lsm_stripe_count; |
| int i; |
| |
| for (i = 0; i < stripe_count; i++) |
| OBD_SLAB_FREE(lsm->lsm_oinfo[i], lov_oinfo_slab, |
| sizeof(struct lov_oinfo)); |
| OBD_FREE_LARGE(lsm, sizeof(struct lov_stripe_md) + |
| stripe_count * sizeof(struct lov_oinfo *)); |
| } |
| |
| static void lsm_unpackmd_common(struct lov_stripe_md *lsm, |
| struct lov_mds_md *lmm) |
| { |
| /* |
| * This supposes lov_mds_md_v1/v3 first fields are |
| * are the same |
| */ |
| lmm_oi_le_to_cpu(&lsm->lsm_oi, &lmm->lmm_oi); |
| lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size); |
| lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern); |
| lsm->lsm_layout_gen = le16_to_cpu(lmm->lmm_layout_gen); |
| lsm->lsm_pool_name[0] = '\0'; |
| } |
| |
| static void |
| lsm_stripe_by_index_plain(struct lov_stripe_md *lsm, int *stripeno, |
| obd_off *lov_off, obd_off *swidth) |
| { |
| if (swidth) |
| *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count; |
| } |
| |
| static void |
| lsm_stripe_by_offset_plain(struct lov_stripe_md *lsm, int *stripeno, |
| obd_off *lov_off, obd_off *swidth) |
| { |
| if (swidth) |
| *swidth = (obd_off)lsm->lsm_stripe_size * lsm->lsm_stripe_count; |
| } |
| |
| static int lsm_destroy_plain(struct lov_stripe_md *lsm, struct obdo *oa, |
| struct obd_export *md_exp) |
| { |
| return 0; |
| } |
| |
| /* Find minimum stripe maxbytes value. For inactive or |
| * reconnecting targets use LUSTRE_STRIPE_MAXBYTES. */ |
| static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes) |
| { |
| struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import; |
| |
| if (imp == NULL || !tgt->ltd_active) { |
| *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES; |
| return; |
| } |
| |
| spin_lock(&imp->imp_lock); |
| if (imp->imp_state == LUSTRE_IMP_FULL && |
| (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES) && |
| imp->imp_connect_data.ocd_maxbytes > 0) { |
| if (*stripe_maxbytes > imp->imp_connect_data.ocd_maxbytes) |
| *stripe_maxbytes = imp->imp_connect_data.ocd_maxbytes; |
| } else { |
| *stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES; |
| } |
| spin_unlock(&imp->imp_lock); |
| } |
| |
| static int lsm_lmm_verify_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes, |
| __u16 *stripe_count) |
| { |
| if (lmm_bytes < sizeof(*lmm)) { |
| CERROR("lov_mds_md_v1 too small: %d, need at least %d\n", |
| lmm_bytes, (int)sizeof(*lmm)); |
| return -EINVAL; |
| } |
| |
| *stripe_count = le16_to_cpu(lmm->lmm_stripe_count); |
| if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED) |
| *stripe_count = 0; |
| |
| if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)) { |
| CERROR("LOV EA V1 too small: %d, need %d\n", |
| lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V1)); |
| lov_dump_lmm_common(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| |
| return lsm_lmm_verify_common(lmm, lmm_bytes, *stripe_count); |
| } |
| |
| int lsm_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm, |
| struct lov_mds_md_v1 *lmm) |
| { |
| struct lov_oinfo *loi; |
| int i; |
| int stripe_count; |
| __u64 stripe_maxbytes = OBD_OBJECT_EOF; |
| |
| lsm_unpackmd_common(lsm, lmm); |
| |
| stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count; |
| |
| for (i = 0; i < stripe_count; i++) { |
| /* XXX LOV STACKING call down to osc_unpackmd() */ |
| loi = lsm->lsm_oinfo[i]; |
| ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi); |
| loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx); |
| loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen); |
| if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) { |
| CERROR("OST index %d more than OST count %d\n", |
| loi->loi_ost_idx, lov->desc.ld_tgt_count); |
| lov_dump_lmm_v1(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| if (!lov->lov_tgts[loi->loi_ost_idx]) { |
| CERROR("OST index %d missing\n", loi->loi_ost_idx); |
| lov_dump_lmm_v1(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| /* calculate the minimum stripe max bytes */ |
| lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx], |
| &stripe_maxbytes); |
| } |
| |
| lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count; |
| if (lsm->lsm_stripe_count == 0) |
| lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count; |
| |
| return 0; |
| } |
| |
| const struct lsm_operations lsm_v1_ops = { |
| .lsm_free = lsm_free_plain, |
| .lsm_destroy = lsm_destroy_plain, |
| .lsm_stripe_by_index = lsm_stripe_by_index_plain, |
| .lsm_stripe_by_offset = lsm_stripe_by_offset_plain, |
| .lsm_lmm_verify = lsm_lmm_verify_v1, |
| .lsm_unpackmd = lsm_unpackmd_v1, |
| }; |
| |
| static int lsm_lmm_verify_v3(struct lov_mds_md *lmmv1, int lmm_bytes, |
| __u16 *stripe_count) |
| { |
| struct lov_mds_md_v3 *lmm; |
| |
| lmm = (struct lov_mds_md_v3 *)lmmv1; |
| |
| if (lmm_bytes < sizeof(*lmm)) { |
| CERROR("lov_mds_md_v3 too small: %d, need at least %d\n", |
| lmm_bytes, (int)sizeof(*lmm)); |
| return -EINVAL; |
| } |
| |
| *stripe_count = le16_to_cpu(lmm->lmm_stripe_count); |
| if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED) |
| *stripe_count = 0; |
| |
| if (lmm_bytes < lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)) { |
| CERROR("LOV EA V3 too small: %d, need %d\n", |
| lmm_bytes, lov_mds_md_size(*stripe_count, LOV_MAGIC_V3)); |
| lov_dump_lmm_common(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| |
| return lsm_lmm_verify_common((struct lov_mds_md_v1 *)lmm, lmm_bytes, |
| *stripe_count); |
| } |
| |
| int lsm_unpackmd_v3(struct lov_obd *lov, struct lov_stripe_md *lsm, |
| struct lov_mds_md *lmmv1) |
| { |
| struct lov_mds_md_v3 *lmm; |
| struct lov_oinfo *loi; |
| int i; |
| int stripe_count; |
| __u64 stripe_maxbytes = OBD_OBJECT_EOF; |
| int cplen = 0; |
| |
| lmm = (struct lov_mds_md_v3 *)lmmv1; |
| |
| lsm_unpackmd_common(lsm, (struct lov_mds_md_v1 *)lmm); |
| |
| stripe_count = lsm_is_released(lsm) ? 0 : lsm->lsm_stripe_count; |
| |
| cplen = strlcpy(lsm->lsm_pool_name, lmm->lmm_pool_name, |
| sizeof(lsm->lsm_pool_name)); |
| if (cplen >= sizeof(lsm->lsm_pool_name)) |
| return -E2BIG; |
| |
| for (i = 0; i < stripe_count; i++) { |
| /* XXX LOV STACKING call down to osc_unpackmd() */ |
| loi = lsm->lsm_oinfo[i]; |
| ostid_le_to_cpu(&lmm->lmm_objects[i].l_ost_oi, &loi->loi_oi); |
| loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx); |
| loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen); |
| if (loi->loi_ost_idx >= lov->desc.ld_tgt_count) { |
| CERROR("OST index %d more than OST count %d\n", |
| loi->loi_ost_idx, lov->desc.ld_tgt_count); |
| lov_dump_lmm_v3(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| if (!lov->lov_tgts[loi->loi_ost_idx]) { |
| CERROR("OST index %d missing\n", loi->loi_ost_idx); |
| lov_dump_lmm_v3(D_WARNING, lmm); |
| return -EINVAL; |
| } |
| /* calculate the minimum stripe max bytes */ |
| lov_tgt_maxbytes(lov->lov_tgts[loi->loi_ost_idx], |
| &stripe_maxbytes); |
| } |
| |
| lsm->lsm_maxbytes = stripe_maxbytes * lsm->lsm_stripe_count; |
| if (lsm->lsm_stripe_count == 0) |
| lsm->lsm_maxbytes = stripe_maxbytes * lov->desc.ld_tgt_count; |
| |
| return 0; |
| } |
| |
| const struct lsm_operations lsm_v3_ops = { |
| .lsm_free = lsm_free_plain, |
| .lsm_destroy = lsm_destroy_plain, |
| .lsm_stripe_by_index = lsm_stripe_by_index_plain, |
| .lsm_stripe_by_offset = lsm_stripe_by_offset_plain, |
| .lsm_lmm_verify = lsm_lmm_verify_v3, |
| .lsm_unpackmd = lsm_unpackmd_v3, |
| }; |
| |
| void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm) |
| { |
| CDEBUG(level, "lsm %p, objid "DOSTID", maxbytes %#llx, magic 0x%08X," |
| " stripe_size %u, stripe_count %u, refc: %d," |
| " layout_gen %u, pool ["LOV_POOLNAMEF"]\n", lsm, |
| POSTID(&lsm->lsm_oi), lsm->lsm_maxbytes, lsm->lsm_magic, |
| lsm->lsm_stripe_size, lsm->lsm_stripe_count, |
| atomic_read(&lsm->lsm_refc), lsm->lsm_layout_gen, |
| lsm->lsm_pool_name); |
| } |