| /* |
| * 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 <obd_class.h> |
| #include <uapi/linux/lustre/lustre_idl.h> |
| |
| /* |
| * 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) |
| 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 dentry *pool_debugfs_entry; /* file in debugfs */ |
| 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, u64 lov_off, |
| int stripeno, u64 *u64); |
| u64 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, |
| u64 start, u64 end, |
| u64 *obd_start, u64 *obd_end); |
| int lov_stripe_number(struct lov_stripe_md *lsm, u64 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); |
| |
| /* 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 const struct file_operations lov_proc_target_fops; |
| void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars); |
| |
| /* 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_pool_putref(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 |