diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/lustre_lmv.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_lmv.h | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_lmv.h b/drivers/staging/lustre/lustre/include/lustre_lmv.h deleted file mode 100644 index 080ec1f8e19f..000000000000 --- a/drivers/staging/lustre/lustre/include/lustre_lmv.h +++ /dev/null @@ -1,174 +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 COPYING 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 - * - * GPL HEADER END - */ -/* - * Copyright (c) 2013, Intel Corporation. - */ -/* - * lustre/include/lustre_lmv.h - * - * Lustre LMV structures and functions. - * - * Author: Di Wang <di.wang@intel.com> - */ - -#ifndef _LUSTRE_LMV_H -#define _LUSTRE_LMV_H -#include <uapi/linux/lustre/lustre_idl.h> - -struct lmv_oinfo { - struct lu_fid lmo_fid; - u32 lmo_mds; - struct inode *lmo_root; -}; - -struct lmv_stripe_md { - __u32 lsm_md_magic; - __u32 lsm_md_stripe_count; - __u32 lsm_md_master_mdt_index; - __u32 lsm_md_hash_type; - __u32 lsm_md_layout_version; - __u32 lsm_md_default_count; - __u32 lsm_md_default_index; - char lsm_md_pool_name[LOV_MAXPOOLNAME + 1]; - struct lmv_oinfo lsm_md_oinfo[0]; -}; - -static inline bool -lsm_md_eq(const struct lmv_stripe_md *lsm1, const struct lmv_stripe_md *lsm2) -{ - __u32 idx; - - if (lsm1->lsm_md_magic != lsm2->lsm_md_magic || - lsm1->lsm_md_stripe_count != lsm2->lsm_md_stripe_count || - lsm1->lsm_md_master_mdt_index != lsm2->lsm_md_master_mdt_index || - lsm1->lsm_md_hash_type != lsm2->lsm_md_hash_type || - lsm1->lsm_md_layout_version != lsm2->lsm_md_layout_version || - strcmp(lsm1->lsm_md_pool_name, lsm2->lsm_md_pool_name) != 0) - return false; - - for (idx = 0; idx < lsm1->lsm_md_stripe_count; idx++) { - if (!lu_fid_eq(&lsm1->lsm_md_oinfo[idx].lmo_fid, - &lsm2->lsm_md_oinfo[idx].lmo_fid)) - return false; - } - - return true; -} - -union lmv_mds_md; - -void lmv_free_memmd(struct lmv_stripe_md *lsm); - -static inline void lmv1_le_to_cpu(struct lmv_mds_md_v1 *lmv_dst, - const struct lmv_mds_md_v1 *lmv_src) -{ - __u32 i; - - lmv_dst->lmv_magic = le32_to_cpu(lmv_src->lmv_magic); - lmv_dst->lmv_stripe_count = le32_to_cpu(lmv_src->lmv_stripe_count); - lmv_dst->lmv_master_mdt_index = - le32_to_cpu(lmv_src->lmv_master_mdt_index); - lmv_dst->lmv_hash_type = le32_to_cpu(lmv_src->lmv_hash_type); - lmv_dst->lmv_layout_version = le32_to_cpu(lmv_src->lmv_layout_version); - - for (i = 0; i < lmv_src->lmv_stripe_count; i++) - fid_le_to_cpu(&lmv_dst->lmv_stripe_fids[i], - &lmv_src->lmv_stripe_fids[i]); -} - -static inline void lmv_le_to_cpu(union lmv_mds_md *lmv_dst, - const union lmv_mds_md *lmv_src) -{ - switch (le32_to_cpu(lmv_src->lmv_magic)) { - case LMV_MAGIC_V1: - lmv1_le_to_cpu(&lmv_dst->lmv_md_v1, &lmv_src->lmv_md_v1); - break; - default: - break; - } -} - -/* This hash is only for testing purpose */ -static inline unsigned int -lmv_hash_all_chars(unsigned int count, const char *name, int namelen) -{ - const unsigned char *p = (const unsigned char *)name; - unsigned int c = 0; - - while (--namelen >= 0) - c += p[namelen]; - - c = c % count; - - return c; -} - -static inline unsigned int -lmv_hash_fnv1a(unsigned int count, const char *name, int namelen) -{ - __u64 hash; - - hash = lustre_hash_fnv_1a_64(name, namelen); - - return do_div(hash, count); -} - -static inline int lmv_name_to_stripe_index(__u32 lmv_hash_type, - unsigned int stripe_count, - const char *name, int namelen) -{ - __u32 hash_type = lmv_hash_type & LMV_HASH_TYPE_MASK; - int idx; - - LASSERT(namelen > 0); - if (stripe_count <= 1) - return 0; - - /* for migrating object, always start from 0 stripe */ - if (lmv_hash_type & LMV_HASH_FLAG_MIGRATION) - return 0; - - switch (hash_type) { - case LMV_HASH_TYPE_ALL_CHARS: - idx = lmv_hash_all_chars(stripe_count, name, namelen); - break; - case LMV_HASH_TYPE_FNV_1A_64: - idx = lmv_hash_fnv1a(stripe_count, name, namelen); - break; - default: - idx = -EBADFD; - break; - } - CDEBUG(D_INFO, "name %.*s hash_type %d idx %d\n", namelen, name, - hash_type, idx); - - return idx; -} - -static inline bool lmv_is_known_hash_type(__u32 type) -{ - return (type & LMV_HASH_TYPE_MASK) == LMV_HASH_TYPE_FNV_1A_64 || - (type & LMV_HASH_TYPE_MASK) == LMV_HASH_TYPE_ALL_CHARS; -} - -#endif |