/* * 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) 2003, 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. */ #ifndef LOV_INTERNAL_H #define LOV_INTERNAL_H #include #include /* If we are unable to get the maximum object size from the OST in * ocd_maxbytes using OBD_CONNECT_MAXBYTES, then we fall back to using * the old maximum object size from ext3. */ #define LUSTRE_EXT3_STRIPE_MAXBYTES 0x1fffffff000ULL struct lov_stripe_md { atomic_t lsm_refc; spinlock_t lsm_lock; pid_t lsm_lock_owner; /* debugging */ /* maximum possible file size, might change as OSTs status changes, * e.g. disconnected, deactivated */ loff_t lsm_maxbytes; struct ost_id lsm_oi; u32 lsm_magic; u32 lsm_stripe_size; u32 lsm_pattern; /* RAID0, RAID1, released, ... */ u16 lsm_stripe_count; u16 lsm_layout_gen; char lsm_pool_name[LOV_MAXPOOLNAME + 1]; struct lov_oinfo *lsm_oinfo[0]; }; static inline bool lsm_is_released(struct lov_stripe_md *lsm) { return !!(lsm->lsm_pattern & LOV_PATTERN_F_RELEASED); } static inline bool lsm_has_objects(struct lov_stripe_md *lsm) { if (lsm == NULL) return false; if (lsm_is_released(lsm)) return false; return true; } struct lsm_operations { void (*lsm_free)(struct lov_stripe_md *); void (*lsm_stripe_by_index)(struct lov_stripe_md *, int *, loff_t *, loff_t *); void (*lsm_stripe_by_offset)(struct lov_stripe_md *, int *, loff_t *, loff_t *); int (*lsm_lmm_verify)(struct lov_mds_md *lmm, int lmm_bytes, u16 *stripe_count); int (*lsm_unpackmd)(struct lov_obd *lov, struct lov_stripe_md *lsm, struct lov_mds_md *lmm); }; extern const struct lsm_operations lsm_v1_ops; extern const struct lsm_operations lsm_v3_ops; static inline const struct lsm_operations *lsm_op_find(int magic) { switch (magic) { case LOV_MAGIC_V1: return &lsm_v1_ops; case LOV_MAGIC_V3: return &lsm_v3_ops; default: CERROR("unrecognized lsm_magic %08x\n", magic); return NULL; } } /* lov_do_div64(a, b) returns a % b, and a = a / b. * The 32-bit code is LOV-specific due to knowing about stripe limits in * order to reduce the divisor to a 32-bit number. If the divisor is * already a 32-bit value the compiler handles this directly. */ #if BITS_PER_LONG == 64 # define lov_do_div64(n, base) ({ \ uint64_t __base = (base); \ uint64_t __rem; \ __rem = ((uint64_t)(n)) % __base; \ (n) = ((uint64_t)(n)) / __base; \ __rem; \ }) #elif BITS_PER_LONG == 32 # define lov_do_div64(n, base) ({ \ uint64_t __rem; \ if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \ int __remainder; \ LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \ "division %llu / %llu\n", (n), (uint64_t)(base)); \ __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \ (n) >>= LOV_MIN_STRIPE_BITS; \ __rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \ __rem <<= LOV_MIN_STRIPE_BITS; \ __rem += __remainder; \ } else { \ __rem = do_div(n, base); \ } \ __rem; \ }) #endif #define pool_tgt_size(p) ((p)->pool_obds.op_size) #define pool_tgt_count(p) ((p)->pool_obds.op_count) #define pool_tgt_array(p) ((p)->pool_obds.op_array) #define pool_tgt_rw_sem(p) ((p)->pool_obds.op_rw_sem) struct pool_desc { char pool_name[LOV_MAXPOOLNAME + 1]; struct ost_pool pool_obds; atomic_t pool_refcount; struct hlist_node pool_hash; /* access by poolname */ struct list_head pool_list; /* serial access */ struct proc_dir_entry *pool_proc_entry; struct obd_device *pool_lobd; /* owner */ }; struct lov_request { struct obd_info rq_oi; struct lov_request_set *rq_rqset; struct list_head rq_link; int rq_idx; /* index in lov->tgts array */ }; struct lov_request_set { struct obd_info *set_oi; struct obd_device *set_obd; int set_count; atomic_t set_completes; atomic_t set_success; struct list_head set_list; }; extern struct kmem_cache *lov_oinfo_slab; extern struct lu_kmem_descr lov_caches[]; #define lov_uuid2str(lv, index) \ (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid) /* lov_merge.c */ int lov_merge_lvb_kms(struct lov_stripe_md *lsm, struct ost_lvb *lvb, __u64 *kms_place); /* lov_offset.c */ u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size, int stripeno); int lov_stripe_offset(struct lov_stripe_md *lsm, loff_t lov_off, int stripeno, loff_t *obd_off); loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size, int stripeno); int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno, loff_t start, loff_t end, loff_t *obd_start, loff_t *obd_end); int lov_stripe_number(struct lov_stripe_md *lsm, loff_t lov_off); pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index, int stripe); /* lov_request.c */ int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo, struct lov_request_set **reqset); int lov_fini_statfs_set(struct lov_request_set *set); /* lov_obd.c */ void lov_stripe_lock(struct lov_stripe_md *md); void lov_stripe_unlock(struct lov_stripe_md *md); void lov_fix_desc(struct lov_desc *desc); void lov_fix_desc_stripe_size(__u64 *val); void lov_fix_desc_stripe_count(__u32 *val); void lov_fix_desc_pattern(__u32 *val); void lov_fix_desc_qos_maxage(__u32 *val); __u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count); int lov_connect_obd(struct obd_device *obd, __u32 index, int activate, struct obd_connect_data *data); int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg); int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg, __u32 *indexp, int *genp); int lov_del_target(struct obd_device *obd, __u32 index, struct obd_uuid *uuidp, int gen); /* lov_pack.c */ ssize_t lov_lsm_pack(const struct lov_stripe_md *lsm, void *buf, size_t buf_size); struct lov_stripe_md *lov_unpackmd(struct lov_obd *lov, struct lov_mds_md *lmm, size_t lmm_size); int lov_free_memmd(struct lov_stripe_md **lsmp); void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm); void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm); void lov_dump_lmm_common(int level, void *lmmp); void lov_dump_lmm(int level, void *lmm); /* lov_ea.c */ struct lov_stripe_md *lsm_alloc_plain(u16 stripe_count); void lsm_free_plain(struct lov_stripe_md *lsm); void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm); /* lproc_lov.c */ extern struct file_operations lov_proc_target_fops; #ifdef CONFIG_PROC_FS extern struct lprocfs_vars lprocfs_lov_obd_vars[]; #endif /* lov_cl.c */ extern struct lu_device_type lov_device_type; /* pools */ extern struct cfs_hash_ops pool_hash_operations; /* ost_pool methods */ int lov_ost_pool_init(struct ost_pool *op, unsigned int count); int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count); int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count); int lov_ost_pool_remove(struct ost_pool *op, __u32 idx); int lov_ost_pool_free(struct ost_pool *op); /* high level pool methods */ int lov_pool_new(struct obd_device *obd, char *poolname); int lov_pool_del(struct obd_device *obd, char *poolname); int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname); int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname); void lov_dump_pool(int level, struct pool_desc *pool); static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm) { LASSERT(atomic_read(&lsm->lsm_refc) > 0); atomic_inc(&lsm->lsm_refc); return lsm; } static inline bool lov_oinfo_is_dummy(const struct lov_oinfo *loi) { if (unlikely(loi->loi_oi.oi.oi_id == 0 && loi->loi_oi.oi.oi_seq == 0 && loi->loi_ost_idx == 0 && loi->loi_ost_gen == 0)) return true; return false; } static inline struct obd_device *lov2obd(const struct lov_obd *lov) { return container_of0(lov, struct obd_device, u.lov); } #endif