diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/lov/lov_pack.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/lov/lov_pack.c | 400 |
1 files changed, 0 insertions, 400 deletions
diff --git a/drivers/staging/lustre/lustre/lov/lov_pack.c b/drivers/staging/lustre/lustre/lov/lov_pack.c deleted file mode 100644 index b1060d02a164..000000000000 --- a/drivers/staging/lustre/lustre/lov/lov_pack.c +++ /dev/null @@ -1,400 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lustre/lov/lov_pack.c - * - * (Un)packing of OST/MDS requests - * - * Author: Andreas Dilger <adilger@clusterfs.com> - */ - -#define DEBUG_SUBSYSTEM S_LOV - -#include <lustre_net.h> -#include <lustre_swab.h> -#include <obd.h> -#include <obd_class.h> -#include <obd_support.h> - -#include "lov_cl_internal.h" -#include "lov_internal.h" - -void lov_dump_lmm_common(int level, void *lmmp) -{ - struct lov_mds_md *lmm = lmmp; - struct ost_id oi; - - lmm_oi_le_to_cpu(&oi, &lmm->lmm_oi); - CDEBUG(level, "objid " DOSTID ", magic 0x%08x, pattern %#x\n", - POSTID(&oi), le32_to_cpu(lmm->lmm_magic), - le32_to_cpu(lmm->lmm_pattern)); - CDEBUG(level, "stripe_size %u, stripe_count %u, layout_gen %u\n", - le32_to_cpu(lmm->lmm_stripe_size), - le16_to_cpu(lmm->lmm_stripe_count), - le16_to_cpu(lmm->lmm_layout_gen)); -} - -static void lov_dump_lmm_objects(int level, struct lov_ost_data *lod, - int stripe_count) -{ - int i; - - if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) { - CDEBUG(level, "bad stripe_count %u > max_stripe_count %u\n", - stripe_count, LOV_V1_INSANE_STRIPE_COUNT); - return; - } - - for (i = 0; i < stripe_count; ++i, ++lod) { - struct ost_id oi; - - ostid_le_to_cpu(&lod->l_ost_oi, &oi); - CDEBUG(level, "stripe %u idx %u subobj " DOSTID "\n", i, - le32_to_cpu(lod->l_ost_idx), POSTID(&oi)); - } -} - -void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm) -{ - lov_dump_lmm_common(level, lmm); - lov_dump_lmm_objects(level, lmm->lmm_objects, - le16_to_cpu(lmm->lmm_stripe_count)); -} - -void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm) -{ - lov_dump_lmm_common(level, lmm); - CDEBUG(level, "pool_name " LOV_POOLNAMEF "\n", lmm->lmm_pool_name); - lov_dump_lmm_objects(level, lmm->lmm_objects, - le16_to_cpu(lmm->lmm_stripe_count)); -} - -/** - * Pack LOV striping metadata for disk storage format (in little - * endian byte order). - * - * This follows the getxattr() conventions. If \a buf_size is zero - * then return the size needed. If \a buf_size is too small then - * return -ERANGE. Otherwise return the size of the result. - */ -ssize_t lov_lsm_pack(const struct lov_stripe_md *lsm, void *buf, - size_t buf_size) -{ - struct lov_ost_data_v1 *lmm_objects; - struct lov_mds_md_v1 *lmmv1 = buf; - struct lov_mds_md_v3 *lmmv3 = buf; - size_t lmm_size; - unsigned int i; - - lmm_size = lov_mds_md_size(lsm->lsm_stripe_count, lsm->lsm_magic); - if (!buf_size) - return lmm_size; - - if (buf_size < lmm_size) - return -ERANGE; - - /* - * lmmv1 and lmmv3 point to the same struct and have the - * same first fields - */ - lmmv1->lmm_magic = cpu_to_le32(lsm->lsm_magic); - lmm_oi_cpu_to_le(&lmmv1->lmm_oi, &lsm->lsm_oi); - lmmv1->lmm_stripe_size = cpu_to_le32(lsm->lsm_stripe_size); - lmmv1->lmm_stripe_count = cpu_to_le16(lsm->lsm_stripe_count); - lmmv1->lmm_pattern = cpu_to_le32(lsm->lsm_pattern); - lmmv1->lmm_layout_gen = cpu_to_le16(lsm->lsm_layout_gen); - - if (lsm->lsm_magic == LOV_MAGIC_V3) { - BUILD_BUG_ON(sizeof(lsm->lsm_pool_name) != - sizeof(lmmv3->lmm_pool_name)); - strlcpy(lmmv3->lmm_pool_name, lsm->lsm_pool_name, - sizeof(lmmv3->lmm_pool_name)); - lmm_objects = lmmv3->lmm_objects; - } else { - lmm_objects = lmmv1->lmm_objects; - } - - for (i = 0; i < lsm->lsm_stripe_count; i++) { - struct lov_oinfo *loi = lsm->lsm_oinfo[i]; - - ostid_cpu_to_le(&loi->loi_oi, &lmm_objects[i].l_ost_oi); - lmm_objects[i].l_ost_gen = cpu_to_le32(loi->loi_ost_gen); - lmm_objects[i].l_ost_idx = cpu_to_le32(loi->loi_ost_idx); - } - - return lmm_size; -} - -/* Find the max stripecount we should use */ -__u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count) -{ - __u32 max_stripes = LOV_MAX_STRIPE_COUNT_OLD; - - if (!stripe_count) - stripe_count = lov->desc.ld_default_stripe_count; - if (stripe_count > lov->desc.ld_active_tgt_count) - stripe_count = lov->desc.ld_active_tgt_count; - if (!stripe_count) - stripe_count = 1; - - /* stripe count is based on whether ldiskfs can handle - * larger EA sizes - */ - if (lov->lov_ocd.ocd_connect_flags & OBD_CONNECT_MAX_EASIZE && - lov->lov_ocd.ocd_max_easize) - max_stripes = lov_mds_md_max_stripe_count( - lov->lov_ocd.ocd_max_easize, magic); - - if (stripe_count > max_stripes) - stripe_count = max_stripes; - - return stripe_count; -} - -static int lov_verify_lmm(void *lmm, int lmm_bytes, __u16 *stripe_count) -{ - int rc; - - if (!lsm_op_find(le32_to_cpu(*(__u32 *)lmm))) { - CERROR("bad disk LOV MAGIC: 0x%08X; dumping LMM (size=%d):\n", - le32_to_cpu(*(__u32 *)lmm), lmm_bytes); - CERROR("%*phN\n", lmm_bytes, lmm); - return -EINVAL; - } - rc = lsm_op_find(le32_to_cpu(*(__u32 *)lmm))->lsm_lmm_verify(lmm, - lmm_bytes, - stripe_count); - return rc; -} - -static struct lov_stripe_md *lov_lsm_alloc(u16 stripe_count, u32 pattern, - u32 magic) -{ - struct lov_stripe_md *lsm; - unsigned int i; - - CDEBUG(D_INFO, "alloc lsm, stripe_count %u\n", stripe_count); - - lsm = lsm_alloc_plain(stripe_count); - if (!lsm) { - CERROR("cannot allocate LSM stripe_count %u\n", stripe_count); - return ERR_PTR(-ENOMEM); - } - - atomic_set(&lsm->lsm_refc, 1); - spin_lock_init(&lsm->lsm_lock); - lsm->lsm_magic = magic; - lsm->lsm_stripe_count = stripe_count; - lsm->lsm_maxbytes = LUSTRE_EXT3_STRIPE_MAXBYTES * stripe_count; - lsm->lsm_pattern = pattern; - lsm->lsm_pool_name[0] = '\0'; - lsm->lsm_layout_gen = 0; - if (stripe_count > 0) - lsm->lsm_oinfo[0]->loi_ost_idx = ~0; - - for (i = 0; i < stripe_count; i++) - loi_init(lsm->lsm_oinfo[i]); - - return lsm; -} - -int lov_free_memmd(struct lov_stripe_md **lsmp) -{ - struct lov_stripe_md *lsm = *lsmp; - int refc; - - *lsmp = NULL; - LASSERT(atomic_read(&lsm->lsm_refc) > 0); - refc = atomic_dec_return(&lsm->lsm_refc); - if (refc == 0) - lsm_op_find(lsm->lsm_magic)->lsm_free(lsm); - - return refc; -} - -/* Unpack LOV object metadata from disk storage. It is packed in LE byte - * order and is opaque to the networking layer. - */ -struct lov_stripe_md *lov_unpackmd(struct lov_obd *lov, struct lov_mds_md *lmm, - size_t lmm_size) -{ - struct lov_stripe_md *lsm; - u16 stripe_count; - u32 pattern; - u32 magic; - int rc; - - rc = lov_verify_lmm(lmm, lmm_size, &stripe_count); - if (rc) - return ERR_PTR(rc); - - magic = le32_to_cpu(lmm->lmm_magic); - pattern = le32_to_cpu(lmm->lmm_pattern); - - lsm = lov_lsm_alloc(stripe_count, pattern, magic); - if (IS_ERR(lsm)) - return lsm; - - LASSERT(lsm_op_find(magic)); - rc = lsm_op_find(magic)->lsm_unpackmd(lov, lsm, lmm); - if (rc) { - lov_free_memmd(&lsm); - return ERR_PTR(rc); - } - - return lsm; -} - -/* Retrieve object striping information. - * - * @lump is a pointer to an in-core struct with lmm_ost_count indicating - * the maximum number of OST indices which will fit in the user buffer. - * lmm_magic must be LOV_USER_MAGIC. - */ -int lov_getstripe(struct lov_object *obj, struct lov_stripe_md *lsm, - struct lov_user_md __user *lump) -{ - /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */ - struct lov_user_md_v3 lum; - struct lov_mds_md *lmmk; - u32 stripe_count; - ssize_t lmm_size; - size_t lmmk_size; - size_t lum_size; - int rc; - - if (!lsm) - return -ENODATA; - - if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) { - CERROR("bad LSM MAGIC: 0x%08X != 0x%08X nor 0x%08X\n", - lsm->lsm_magic, LOV_MAGIC_V1, LOV_MAGIC_V3); - rc = -EIO; - goto out; - } - - if (!lsm_is_released(lsm)) - stripe_count = lsm->lsm_stripe_count; - else - stripe_count = 0; - - /* we only need the header part from user space to get lmm_magic and - * lmm_stripe_count, (the header part is common to v1 and v3) - */ - lum_size = sizeof(struct lov_user_md_v1); - if (copy_from_user(&lum, lump, lum_size)) { - rc = -EFAULT; - goto out; - } - if (lum.lmm_magic != LOV_USER_MAGIC_V1 && - lum.lmm_magic != LOV_USER_MAGIC_V3 && - lum.lmm_magic != LOV_USER_MAGIC_SPECIFIC) { - rc = -EINVAL; - goto out; - } - - if (lum.lmm_stripe_count && - (lum.lmm_stripe_count < lsm->lsm_stripe_count)) { - /* Return right size of stripe to user */ - lum.lmm_stripe_count = stripe_count; - rc = copy_to_user(lump, &lum, lum_size); - rc = -EOVERFLOW; - goto out; - } - lmmk_size = lov_mds_md_size(stripe_count, lsm->lsm_magic); - - - lmmk = kvzalloc(lmmk_size, GFP_NOFS); - if (!lmmk) { - rc = -ENOMEM; - goto out; - } - - lmm_size = lov_lsm_pack(lsm, lmmk, lmmk_size); - if (lmm_size < 0) { - rc = lmm_size; - goto out_free; - } - - /* FIXME: Bug 1185 - copy fields properly when structs change */ - /* struct lov_user_md_v3 and struct lov_mds_md_v3 must be the same */ - BUILD_BUG_ON(sizeof(lum) != sizeof(struct lov_mds_md_v3)); - BUILD_BUG_ON(sizeof(lum.lmm_objects[0]) != sizeof(lmmk->lmm_objects[0])); - - if (cpu_to_le32(LOV_MAGIC) != LOV_MAGIC && - (lmmk->lmm_magic == cpu_to_le32(LOV_MAGIC_V1) || - lmmk->lmm_magic == cpu_to_le32(LOV_MAGIC_V3))) { - lustre_swab_lov_mds_md(lmmk); - lustre_swab_lov_user_md_objects( - (struct lov_user_ost_data *)lmmk->lmm_objects, - lmmk->lmm_stripe_count); - } - - if (lum.lmm_magic == LOV_USER_MAGIC) { - /* User request for v1, we need skip lmm_pool_name */ - if (lmmk->lmm_magic == LOV_MAGIC_V3) { - memmove(((struct lov_mds_md_v1 *)lmmk)->lmm_objects, - ((struct lov_mds_md_v3 *)lmmk)->lmm_objects, - lmmk->lmm_stripe_count * - sizeof(struct lov_ost_data_v1)); - lmm_size -= LOV_MAXPOOLNAME; - } - } else { - /* if v3 we just have to update the lum_size */ - lum_size = sizeof(struct lov_user_md_v3); - } - - /* User wasn't expecting this many OST entries */ - if (lum.lmm_stripe_count == 0) { - lmm_size = lum_size; - } else if (lum.lmm_stripe_count < lmmk->lmm_stripe_count) { - rc = -EOVERFLOW; - goto out_free; - } - /* - * Have a difference between lov_mds_md & lov_user_md. - * So we have to re-order the data before copy to user. - */ - lum.lmm_stripe_count = lmmk->lmm_stripe_count; - lum.lmm_layout_gen = lmmk->lmm_layout_gen; - ((struct lov_user_md *)lmmk)->lmm_layout_gen = lum.lmm_layout_gen; - ((struct lov_user_md *)lmmk)->lmm_stripe_count = lum.lmm_stripe_count; - if (copy_to_user(lump, lmmk, lmm_size)) - rc = -EFAULT; - else - rc = 0; - -out_free: - kvfree(lmmk); -out: - return rc; -} |