1/* 2 * GPL HEADER START 3 * 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 only, 8 * as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License version 2 for more details (a copy is included 14 * in the LICENSE file that accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License 17 * version 2 along with this program; If not, see 18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf 19 * 20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 21 * CA 95054 USA or visit www.sun.com if you need additional information or 22 * have any questions. 23 * 24 * GPL HEADER END 25 */ 26/* 27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 28 * Use is subject to license terms. 29 * 30 * Copyright (c) 2011, 2012, Intel Corporation. 31 */ 32/* 33 * This file is part of Lustre, http://www.lustre.org/ 34 * Lustre is a trademark of Sun Microsystems, Inc. 35 */ 36 37#ifndef LOV_INTERNAL_H 38#define LOV_INTERNAL_H 39 40#include "../include/obd_class.h" 41#include "../include/lustre/lustre_user.h" 42 43/* lov_do_div64(a, b) returns a % b, and a = a / b. 44 * The 32-bit code is LOV-specific due to knowing about stripe limits in 45 * order to reduce the divisor to a 32-bit number. If the divisor is 46 * already a 32-bit value the compiler handles this directly. */ 47#if BITS_PER_LONG == 64 48# define lov_do_div64(n, base) ({ \ 49 uint64_t __base = (base); \ 50 uint64_t __rem; \ 51 __rem = ((uint64_t)(n)) % __base; \ 52 (n) = ((uint64_t)(n)) / __base; \ 53 __rem; \ 54}) 55#elif BITS_PER_LONG == 32 56# define lov_do_div64(n, base) ({ \ 57 uint64_t __rem; \ 58 if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \ 59 int __remainder; \ 60 LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \ 61 "division %llu / %llu\n", (n), (uint64_t)(base)); \ 62 __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \ 63 (n) >>= LOV_MIN_STRIPE_BITS; \ 64 __rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \ 65 __rem <<= LOV_MIN_STRIPE_BITS; \ 66 __rem += __remainder; \ 67 } else { \ 68 __rem = do_div(n, base); \ 69 } \ 70 __rem; \ 71}) 72#endif 73 74struct lov_lock_handles { 75 struct portals_handle llh_handle; 76 atomic_t llh_refcount; 77 int llh_stripe_count; 78 struct lustre_handle llh_handles[0]; 79}; 80 81struct lov_request { 82 struct obd_info rq_oi; 83 struct lov_request_set *rq_rqset; 84 85 struct list_head rq_link; 86 87 int rq_idx; /* index in lov->tgts array */ 88 int rq_stripe; /* stripe number */ 89 int rq_complete; 90 int rq_rc; 91 int rq_buflen; /* length of sub_md */ 92 93 u32 rq_oabufs; 94 u32 rq_pgaidx; 95}; 96 97struct lov_request_set { 98 struct ldlm_enqueue_info *set_ei; 99 struct obd_info *set_oi; 100 atomic_t set_refcount; 101 struct obd_export *set_exp; 102 /* XXX: There is @set_exp already, however obd_statfs gets obd_device 103 only. */ 104 struct obd_device *set_obd; 105 int set_count; 106 atomic_t set_completes; 107 atomic_t set_success; 108 atomic_t set_finish_checked; 109 struct llog_cookie *set_cookies; 110 int set_cookie_sent; 111 struct obd_trans_info *set_oti; 112 u32 set_oabufs; 113 struct brw_page *set_pga; 114 struct lov_lock_handles *set_lockh; 115 struct list_head set_list; 116 wait_queue_head_t set_waitq; 117 spinlock_t set_lock; 118}; 119 120extern struct kmem_cache *lov_oinfo_slab; 121 122extern struct lu_kmem_descr lov_caches[]; 123 124void lov_finish_set(struct lov_request_set *set); 125 126static inline void lov_get_reqset(struct lov_request_set *set) 127{ 128 LASSERT(set != NULL); 129 LASSERT(atomic_read(&set->set_refcount) > 0); 130 atomic_inc(&set->set_refcount); 131} 132 133static inline void lov_put_reqset(struct lov_request_set *set) 134{ 135 if (atomic_dec_and_test(&set->set_refcount)) 136 lov_finish_set(set); 137} 138 139static inline struct lov_lock_handles * 140lov_handle2llh(struct lustre_handle *handle) 141{ 142 LASSERT(handle != NULL); 143 return class_handle2object(handle->cookie); 144} 145 146static inline void lov_llh_put(struct lov_lock_handles *llh) 147{ 148 CDEBUG(D_INFO, "PUTting llh %p : new refcount %d\n", llh, 149 atomic_read(&llh->llh_refcount) - 1); 150 LASSERT(atomic_read(&llh->llh_refcount) > 0 && 151 atomic_read(&llh->llh_refcount) < 0x5a5a); 152 if (atomic_dec_and_test(&llh->llh_refcount)) { 153 class_handle_unhash(&llh->llh_handle); 154 /* The structure may be held by other threads because RCU. 155 * -jxiong */ 156 if (atomic_read(&llh->llh_refcount)) 157 return; 158 159 OBD_FREE_RCU(llh, sizeof(*llh) + 160 sizeof(*llh->llh_handles) * llh->llh_stripe_count, 161 &llh->llh_handle); 162 } 163} 164 165#define lov_uuid2str(lv, index) \ 166 (char *)((lv)->lov_tgts[index]->ltd_uuid.uuid) 167 168/* lov_merge.c */ 169void lov_merge_attrs(struct obdo *tgt, struct obdo *src, u64 valid, 170 struct lov_stripe_md *lsm, int stripeno, int *set); 171int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm, 172 u64 size, int shrink); 173int lov_merge_lvb_kms(struct lov_stripe_md *lsm, 174 struct ost_lvb *lvb, __u64 *kms_place); 175 176/* lov_offset.c */ 177u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size, 178 int stripeno); 179int lov_stripe_offset(struct lov_stripe_md *lsm, u64 lov_off, 180 int stripeno, u64 *u64); 181u64 lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size, 182 int stripeno); 183int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno, 184 u64 start, u64 end, 185 u64 *obd_start, u64 *obd_end); 186int lov_stripe_number(struct lov_stripe_md *lsm, u64 lov_off); 187 188/* lov_qos.c */ 189#define LOV_USES_ASSIGNED_STRIPE 0 190#define LOV_USES_DEFAULT_STRIPE 1 191int qos_add_tgt(struct obd_device *obd, __u32 index); 192int qos_del_tgt(struct obd_device *obd, struct lov_tgt_desc *tgt); 193void qos_shrink_lsm(struct lov_request_set *set); 194int qos_prep_create(struct obd_export *exp, struct lov_request_set *set); 195void qos_update(struct lov_obd *lov); 196void qos_statfs_done(struct lov_obd *lov); 197void qos_statfs_update(struct obd_device *obd, __u64 max_age, int wait); 198int qos_remedy_create(struct lov_request_set *set, struct lov_request *req); 199 200/* lov_request.c */ 201void lov_set_add_req(struct lov_request *req, struct lov_request_set *set); 202int lov_set_finished(struct lov_request_set *set, int idempotent); 203void lov_update_set(struct lov_request_set *set, 204 struct lov_request *req, int rc); 205int lov_update_common_set(struct lov_request_set *set, 206 struct lov_request *req, int rc); 207int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx); 208int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo, 209 struct lov_request_set **reqset); 210int lov_fini_getattr_set(struct lov_request_set *set); 211int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo, 212 struct obdo *src_oa, struct lov_stripe_md *lsm, 213 struct obd_trans_info *oti, 214 struct lov_request_set **reqset); 215int lov_fini_destroy_set(struct lov_request_set *set); 216int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo, 217 struct obd_trans_info *oti, 218 struct lov_request_set **reqset); 219int lov_update_setattr_set(struct lov_request_set *set, 220 struct lov_request *req, int rc); 221int lov_fini_setattr_set(struct lov_request_set *set); 222int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo, 223 struct lov_request_set **reqset); 224void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs, 225 int success); 226int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs, 227 int success); 228int lov_fini_statfs_set(struct lov_request_set *set); 229int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc); 230 231/* lov_obd.c */ 232void lov_fix_desc(struct lov_desc *desc); 233void lov_fix_desc_stripe_size(__u64 *val); 234void lov_fix_desc_stripe_count(__u32 *val); 235void lov_fix_desc_pattern(__u32 *val); 236void lov_fix_desc_qos_maxage(__u32 *val); 237__u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count); 238int lov_connect_obd(struct obd_device *obd, __u32 index, int activate, 239 struct obd_connect_data *data); 240int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg); 241int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg, 242 __u32 *indexp, int *genp); 243int lov_del_target(struct obd_device *obd, __u32 index, 244 struct obd_uuid *uuidp, int gen); 245 246/* lov_pack.c */ 247int lov_packmd(struct obd_export *exp, struct lov_mds_md **lmm, 248 struct lov_stripe_md *lsm); 249int lov_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp, 250 struct lov_mds_md *lmm, int lmm_bytes); 251int lov_getstripe(struct obd_export *exp, 252 struct lov_stripe_md *lsm, struct lov_user_md *lump); 253int lov_alloc_memmd(struct lov_stripe_md **lsmp, __u16 stripe_count, 254 int pattern, int magic); 255int lov_free_memmd(struct lov_stripe_md **lsmp); 256 257void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm); 258void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm); 259void lov_dump_lmm_common(int level, void *lmmp); 260void lov_dump_lmm(int level, void *lmm); 261 262/* lov_ea.c */ 263struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size); 264void lsm_free_plain(struct lov_stripe_md *lsm); 265void dump_lsm(unsigned int level, const struct lov_stripe_md *lsm); 266 267/* lproc_lov.c */ 268#if defined (CONFIG_PROC_FS) 269extern const struct file_operations lov_proc_target_fops; 270void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars); 271#else 272static inline void lprocfs_lov_init_vars(struct lprocfs_static_vars *lvars) 273{ 274 memset(lvars, 0, sizeof(*lvars)); 275} 276#endif 277 278/* lov_cl.c */ 279extern struct lu_device_type lov_device_type; 280 281/* pools */ 282extern cfs_hash_ops_t pool_hash_operations; 283/* ost_pool methods */ 284int lov_ost_pool_init(struct ost_pool *op, unsigned int count); 285int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count); 286int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count); 287int lov_ost_pool_remove(struct ost_pool *op, __u32 idx); 288int lov_ost_pool_free(struct ost_pool *op); 289 290/* high level pool methods */ 291int lov_pool_new(struct obd_device *obd, char *poolname); 292int lov_pool_del(struct obd_device *obd, char *poolname); 293int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname); 294int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname); 295void lov_dump_pool(int level, struct pool_desc *pool); 296struct pool_desc *lov_find_pool(struct lov_obd *lov, char *poolname); 297int lov_check_index_in_pool(__u32 idx, struct pool_desc *pool); 298void lov_pool_putref(struct pool_desc *pool); 299 300static inline struct lov_stripe_md *lsm_addref(struct lov_stripe_md *lsm) 301{ 302 LASSERT(atomic_read(&lsm->lsm_refc) > 0); 303 atomic_inc(&lsm->lsm_refc); 304 return lsm; 305} 306 307#endif 308