diff options
Diffstat (limited to 'kernel/drivers/staging/lustre/lustre/lov/lov_internal.h')
| -rw-r--r-- | kernel/drivers/staging/lustre/lustre/lov/lov_internal.h | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/kernel/drivers/staging/lustre/lustre/lov/lov_internal.h b/kernel/drivers/staging/lustre/lustre/lov/lov_internal.h new file mode 100644 index 000000000..b644acc9b --- /dev/null +++ b/kernel/drivers/staging/lustre/lustre/lov/lov_internal.h @@ -0,0 +1,319 @@ +/* + * 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) 2003, 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. + */ + +#ifndef LOV_INTERNAL_H +#define LOV_INTERNAL_H + +#include "../include/obd_class.h" +#include "../include/lustre/lustre_user.h" + +/* 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 + +struct lov_lock_handles { + struct portals_handle llh_handle; + atomic_t llh_refcount; + int llh_stripe_count; + struct lustre_handle llh_handles[0]; +}; + +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 */ + int rq_stripe; /* stripe number */ + int rq_complete; + int rq_rc; + int rq_buflen; /* length of sub_md */ + + u32 rq_oabufs; + u32 rq_pgaidx; +}; + +struct lov_request_set { + struct ldlm_enqueue_info *set_ei; + struct obd_info *set_oi; + atomic_t set_refcount; + struct obd_export *set_exp; + /* XXX: There is @set_exp already, however obd_statfs gets obd_device + only. */ + struct obd_device *set_obd; + int set_count; + atomic_t set_completes; + atomic_t set_success; + atomic_t set_finish_checked; + struct llog_cookie *set_cookies; + int set_cookie_sent; + struct obd_trans_info *set_oti; + u32 set_oabufs; + struct brw_page *set_pga; + struct lov_lock_handles *set_lockh; + struct list_head set_list; + wait_queue_head_t set_waitq; + spinlock_t set_lock; +}; + +extern struct kmem_cache *lov_oinfo_slab; + +extern struct lu_kmem_descr lov_caches[]; + +void lov_finish_set(struct lov_request_set *set); + +static inline void lov_get_reqset(struct lov_request_set *set) +{ + LASSERT(set != NULL); + LASSERT(atomic_read(&set->set_refcount) > 0); + atomic_inc(&set->set_refcount); +} + +static inline void lov_put_reqset(struct lov_request_set *set) +{ + if (atomic_dec_and_test(&set->set_refcount)) + lov_finish_set(set); +} + +static inline struct lov_lock_handles * +lov_handle2llh(struct lustre_handle *handle) +{ + LASSERT(handle != NULL); + return class_handle2object(handle->cookie); +} + +static inline void lov_llh_put(struct lov_lock_handles *llh) +{ + CDEBUG(D_INFO, "PUTting llh %p : new refcount %d\n", llh, + atomic_read(&llh->llh_refcount) - 1); + LASSERT(atomic_read(&llh->llh_refcount) > 0 && + atomic_read(&llh->llh_refcount) < 0x5a5a); + if (atomic_dec_and_test(&llh->llh_refcount)) { + class_handle_unhash(&llh->llh_handle); + /* The structure may be held by other threads because RCU. + * -jxiong */ + if (atomic_read(&llh->llh_refcount)) + return; + + OBD_FREE_RCU(llh, sizeof(*llh) + + sizeof(*llh->llh_handles) * llh->llh_stripe_count, + &llh->llh_handle); + } +} + +#define lov_uuid2str(lv, index) \ + (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid) + +/* lov_merge.c */ +void lov_merge_attrs(struct obdo *tgt, struct obdo *src, u64 valid, + struct lov_stripe_md *lsm, int stripeno, int *set); +int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm, + u64 size, int shrink); +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); + +/* lov_qos.c */ +#define LOV_USES_ASSIGNED_STRIPE 0 +#define LOV_USES_DEFAULT_STRIPE 1 +int qos_add_tgt(struct obd_device *obd, __u32 index); +int qos_del_tgt(struct obd_device *obd, struct lov_tgt_desc *tgt); +void qos_shrink_lsm(struct lov_request_set *set); +int qos_prep_create(struct obd_export *exp, struct lov_request_set *set); +void qos_update(struct lov_obd *lov); +void qos_statfs_done(struct lov_obd *lov); +void qos_statfs_update(struct obd_device *obd, __u64 max_age, int wait); +int qos_remedy_create(struct lov_request_set *set, struct lov_request *req); + +/* lov_request.c */ +void lov_set_add_req(struct lov_request *req, struct lov_request_set *set); +int lov_set_finished(struct lov_request_set *set, int idempotent); +void lov_update_set(struct lov_request_set *set, + struct lov_request *req, int rc); +int lov_update_common_set(struct lov_request_set *set, + struct lov_request *req, int rc); +int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx); +int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo, + struct lov_request_set **reqset); +int lov_fini_getattr_set(struct lov_request_set *set); +int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo, + struct obdo *src_oa, struct lov_stripe_md *lsm, + struct obd_trans_info *oti, + struct lov_request_set **reqset); +int lov_fini_destroy_set(struct lov_request_set *set); +int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo, + struct obd_trans_info *oti, + struct lov_request_set **reqset); +int lov_update_setattr_set(struct lov_request_set *set, + struct lov_request *req, int rc); +int lov_fini_setattr_set(struct lov_request_set *set); +int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo, + struct lov_request_set **reqset); +void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs, + int success); +int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs, + int success); +int lov_fini_statfs_set(struct lov_request_set *set); +int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc); + +/* lov_obd.c */ +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 */ +int lov_packmd(struct obd_export *exp, struct lov_mds_md **lmm, + struct lov_stripe_md *lsm); +int lov_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp, + struct lov_mds_md *lmm, int lmm_bytes); +int lov_getstripe(struct obd_export *exp, + struct lov_stripe_md *lsm, struct lov_user_md *lump); +int lov_alloc_memmd(struct lov_stripe_md **lsmp, __u16 stripe_count, + int pattern, int magic); +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, int *size); +void lsm_free_plain(struct lov_stripe_md *lsm); +void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm); + +/* lproc_lov.c */ +#if defined (CONFIG_PROC_FS) +extern const struct file_operations lov_proc_target_fops; +void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars); +#else +static inline void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars) +{ + memset(lvars, 0, sizeof(*lvars)); +} +#endif + +/* lov_cl.c */ +extern struct lu_device_type lov_device_type; + +/* pools */ +extern cfs_hash_ops_t 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); +struct pool_desc *lov_find_pool(struct lov_obd *lov, char *poolname); +int lov_check_index_in_pool(__u32 idx, struct pool_desc *pool); +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; +} + + +#endif |