| /* |
| * 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) 2002, 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. |
| */ |
| /** \defgroup obd_export PortalRPC export definitions |
| * |
| * @{ |
| */ |
| |
| #ifndef __EXPORT_H |
| #define __EXPORT_H |
| |
| /** \defgroup export export |
| * |
| * @{ |
| */ |
| |
| #include <lprocfs_status.h> |
| #include <lustre/lustre_idl.h> |
| #include <lustre_dlm.h> |
| |
| struct mds_client_data; |
| struct mdt_client_data; |
| struct mds_idmap_table; |
| struct mdt_idmap_table; |
| |
| /** |
| * Target-specific export data |
| */ |
| struct tg_export_data { |
| /** Protects led_lcd below */ |
| struct mutex ted_lcd_lock; |
| /** Per-client data for each export */ |
| struct lsd_client_data *ted_lcd; |
| /** Offset of record in last_rcvd file */ |
| loff_t ted_lr_off; |
| /** Client index in last_rcvd file */ |
| int ted_lr_idx; |
| }; |
| |
| /** |
| * MDT-specific export data |
| */ |
| struct mdt_export_data { |
| struct tg_export_data med_ted; |
| /** List of all files opened by client on this MDT */ |
| struct list_head med_open_head; |
| spinlock_t med_open_lock; /* med_open_head, mfd_list */ |
| /** Bitmask of all ibit locks this MDT understands */ |
| __u64 med_ibits_known; |
| struct mutex med_idmap_mutex; |
| struct lustre_idmap_table *med_idmap; |
| }; |
| |
| struct ec_export_data { /* echo client */ |
| struct list_head eced_locks; |
| }; |
| |
| /* In-memory access to client data from OST struct */ |
| /** Filter (oss-side) specific import data */ |
| struct filter_export_data { |
| struct tg_export_data fed_ted; |
| spinlock_t fed_lock; /**< protects fed_mod_list */ |
| long fed_dirty; /* in bytes */ |
| long fed_grant; /* in bytes */ |
| struct list_head fed_mod_list; /* files being modified */ |
| int fed_mod_count;/* items in fed_writing list */ |
| long fed_pending; /* bytes just being written */ |
| __u32 fed_group; |
| __u8 fed_pagesize; /* log2 of client page size */ |
| }; |
| |
| struct mgs_export_data { |
| struct list_head med_clients; /* mgc fs client via this exp */ |
| spinlock_t med_lock; /* protect med_clients */ |
| }; |
| |
| /** |
| * per-NID statistics structure. |
| * It tracks access patterns to this export on a per-client-NID basis |
| */ |
| struct nid_stat { |
| lnet_nid_t nid; |
| struct hlist_node nid_hash; |
| struct list_head nid_list; |
| struct obd_device *nid_obd; |
| struct proc_dir_entry *nid_proc; |
| struct lprocfs_stats *nid_stats; |
| struct lprocfs_stats *nid_ldlm_stats; |
| atomic_t nid_exp_ref_count; /* for obd_nid_stats_hash |
| exp_nid_stats */ |
| }; |
| |
| #define nidstat_getref(nidstat) \ |
| do { \ |
| atomic_inc(&(nidstat)->nid_exp_ref_count); \ |
| } while(0) |
| |
| #define nidstat_putref(nidstat) \ |
| do { \ |
| atomic_dec(&(nidstat)->nid_exp_ref_count); \ |
| LASSERTF(atomic_read(&(nidstat)->nid_exp_ref_count) >= 0, \ |
| "stat %p nid_exp_ref_count < 0\n", nidstat); \ |
| } while(0) |
| |
| enum obd_option { |
| OBD_OPT_FORCE = 0x0001, |
| OBD_OPT_FAILOVER = 0x0002, |
| OBD_OPT_ABORT_RECOV = 0x0004, |
| }; |
| |
| /** |
| * Export structure. Represents target-side of connection in portals. |
| * Also used in Lustre to connect between layers on the same node when |
| * there is no network-connection in-between. |
| * For every connected client there is an export structure on the server |
| * attached to the same obd device. |
| */ |
| struct obd_export { |
| /** |
| * Export handle, it's id is provided to client on connect |
| * Subsequent client RPCs contain this handle id to identify |
| * what export they are talking to. |
| */ |
| struct portals_handle exp_handle; |
| atomic_t exp_refcount; |
| /** |
| * Set of counters below is to track where export references are |
| * kept. The exp_rpc_count is used for reconnect handling also, |
| * the cb_count and locks_count are for debug purposes only for now. |
| * The sum of them should be less than exp_refcount by 3 |
| */ |
| atomic_t exp_rpc_count; /* RPC references */ |
| atomic_t exp_cb_count; /* Commit callback references */ |
| /** Number of queued replay requests to be processes */ |
| atomic_t exp_replay_count; |
| atomic_t exp_locks_count; /** Lock references */ |
| #if LUSTRE_TRACKS_LOCK_EXP_REFS |
| struct list_head exp_locks_list; |
| spinlock_t exp_locks_list_guard; |
| #endif |
| /** UUID of client connected to this export */ |
| struct obd_uuid exp_client_uuid; |
| /** To link all exports on an obd device */ |
| struct list_head exp_obd_chain; |
| struct hlist_node exp_uuid_hash; /** uuid-export hash*/ |
| struct hlist_node exp_nid_hash; /** nid-export hash */ |
| /** |
| * All exports eligible for ping evictor are linked into a list |
| * through this field in "most time since last request on this export" |
| * order |
| * protected by obd_dev_lock |
| */ |
| struct list_head exp_obd_chain_timed; |
| /** Obd device of this export */ |
| struct obd_device *exp_obd; |
| /** |
| * "reverse" import to send requests (e.g. from ldlm) back to client |
| * exp_lock protect its change |
| */ |
| struct obd_import *exp_imp_reverse; |
| struct nid_stat *exp_nid_stats; |
| struct lprocfs_stats *exp_md_stats; |
| /** Active connetion */ |
| struct ptlrpc_connection *exp_connection; |
| /** Connection count value from last succesful reconnect rpc */ |
| __u32 exp_conn_cnt; |
| /** Hash list of all ldlm locks granted on this export */ |
| cfs_hash_t *exp_lock_hash; |
| /** |
| * Hash list for Posix lock deadlock detection, added with |
| * ldlm_lock::l_exp_flock_hash. |
| */ |
| cfs_hash_t *exp_flock_hash; |
| struct list_head exp_outstanding_replies; |
| struct list_head exp_uncommitted_replies; |
| spinlock_t exp_uncommitted_replies_lock; |
| /** Last committed transno for this export */ |
| __u64 exp_last_committed; |
| /** When was last request received */ |
| cfs_time_t exp_last_request_time; |
| /** On replay all requests waiting for replay are linked here */ |
| struct list_head exp_req_replay_queue; |
| /** |
| * protects exp_flags, exp_outstanding_replies and the change |
| * of exp_imp_reverse |
| */ |
| spinlock_t exp_lock; |
| /** Compatibility flags for this export are embedded into |
| * exp_connect_data */ |
| struct obd_connect_data exp_connect_data; |
| enum obd_option exp_flags; |
| unsigned long exp_failed:1, |
| exp_in_recovery:1, |
| exp_disconnected:1, |
| exp_connecting:1, |
| /** VBR: export missed recovery */ |
| exp_delayed:1, |
| /** VBR: failed version checking */ |
| exp_vbr_failed:1, |
| exp_req_replay_needed:1, |
| exp_lock_replay_needed:1, |
| exp_need_sync:1, |
| exp_flvr_changed:1, |
| exp_flvr_adapt:1, |
| exp_libclient:1, /* liblustre client? */ |
| /* client timed out and tried to reconnect, |
| * but couldn't because of active rpcs */ |
| exp_abort_active_req:1, |
| /* if to swap nidtbl entries for 2.2 clients. |
| * Only used by the MGS to fix LU-1644. */ |
| exp_need_mne_swab:1; |
| /* also protected by exp_lock */ |
| enum lustre_sec_part exp_sp_peer; |
| struct sptlrpc_flavor exp_flvr; /* current */ |
| struct sptlrpc_flavor exp_flvr_old[2]; /* about-to-expire */ |
| cfs_time_t exp_flvr_expire[2]; /* seconds */ |
| |
| /** protects exp_hp_rpcs */ |
| spinlock_t exp_rpc_lock; |
| struct list_head exp_hp_rpcs; /* (potential) HP RPCs */ |
| |
| /** blocking dlm lock list, protected by exp_bl_list_lock */ |
| struct list_head exp_bl_list; |
| spinlock_t exp_bl_list_lock; |
| |
| /** Target specific data */ |
| union { |
| struct tg_export_data eu_target_data; |
| struct mdt_export_data eu_mdt_data; |
| struct filter_export_data eu_filter_data; |
| struct ec_export_data eu_ec_data; |
| struct mgs_export_data eu_mgs_data; |
| } u; |
| }; |
| |
| #define exp_target_data u.eu_target_data |
| #define exp_mdt_data u.eu_mdt_data |
| #define exp_filter_data u.eu_filter_data |
| #define exp_ec_data u.eu_ec_data |
| |
| static inline __u64 *exp_connect_flags_ptr(struct obd_export *exp) |
| { |
| return &exp->exp_connect_data.ocd_connect_flags; |
| } |
| |
| static inline __u64 exp_connect_flags(struct obd_export *exp) |
| { |
| return *exp_connect_flags_ptr(exp); |
| } |
| |
| static inline int exp_max_brw_size(struct obd_export *exp) |
| { |
| LASSERT(exp != NULL); |
| if (exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE) |
| return exp->exp_connect_data.ocd_brw_size; |
| |
| return ONE_MB_BRW_SIZE; |
| } |
| |
| static inline int exp_connect_multibulk(struct obd_export *exp) |
| { |
| return exp_max_brw_size(exp) > ONE_MB_BRW_SIZE; |
| } |
| |
| static inline int exp_expired(struct obd_export *exp, cfs_duration_t age) |
| { |
| LASSERT(exp->exp_delayed); |
| return cfs_time_before(cfs_time_add(exp->exp_last_request_time, age), |
| cfs_time_current_sec()); |
| } |
| |
| static inline int exp_connect_cancelset(struct obd_export *exp) |
| { |
| LASSERT(exp != NULL); |
| return !!(exp_connect_flags(exp) & OBD_CONNECT_CANCELSET); |
| } |
| |
| static inline int exp_connect_lru_resize(struct obd_export *exp) |
| { |
| LASSERT(exp != NULL); |
| return !!(exp_connect_flags(exp) & OBD_CONNECT_LRU_RESIZE); |
| } |
| |
| static inline int exp_connect_rmtclient(struct obd_export *exp) |
| { |
| LASSERT(exp != NULL); |
| return !!(exp_connect_flags(exp) & OBD_CONNECT_RMT_CLIENT); |
| } |
| |
| static inline int client_is_remote(struct obd_export *exp) |
| { |
| struct obd_import *imp = class_exp2cliimp(exp); |
| |
| return !!(imp->imp_connect_data.ocd_connect_flags & |
| OBD_CONNECT_RMT_CLIENT); |
| } |
| |
| static inline int exp_connect_vbr(struct obd_export *exp) |
| { |
| LASSERT(exp != NULL); |
| LASSERT(exp->exp_connection); |
| return !!(exp_connect_flags(exp) & OBD_CONNECT_VBR); |
| } |
| |
| static inline int exp_connect_som(struct obd_export *exp) |
| { |
| LASSERT(exp != NULL); |
| return !!(exp_connect_flags(exp) & OBD_CONNECT_SOM); |
| } |
| |
| static inline int exp_connect_umask(struct obd_export *exp) |
| { |
| return !!(exp_connect_flags(exp) & OBD_CONNECT_UMASK); |
| } |
| |
| static inline int imp_connect_lru_resize(struct obd_import *imp) |
| { |
| struct obd_connect_data *ocd; |
| |
| LASSERT(imp != NULL); |
| ocd = &imp->imp_connect_data; |
| return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE); |
| } |
| |
| static inline int exp_connect_layout(struct obd_export *exp) |
| { |
| return !!(exp_connect_flags(exp) & OBD_CONNECT_LAYOUTLOCK); |
| } |
| |
| static inline bool exp_connect_lvb_type(struct obd_export *exp) |
| { |
| LASSERT(exp != NULL); |
| if (exp_connect_flags(exp) & OBD_CONNECT_LVB_TYPE) |
| return true; |
| else |
| return false; |
| } |
| |
| static inline bool imp_connect_lvb_type(struct obd_import *imp) |
| { |
| struct obd_connect_data *ocd; |
| |
| LASSERT(imp != NULL); |
| ocd = &imp->imp_connect_data; |
| if (ocd->ocd_connect_flags & OBD_CONNECT_LVB_TYPE) |
| return true; |
| else |
| return false; |
| } |
| |
| extern struct obd_export *class_conn2export(struct lustre_handle *conn); |
| extern struct obd_device *class_conn2obd(struct lustre_handle *conn); |
| |
| /** @} export */ |
| |
| #endif /* __EXPORT_H */ |
| /** @} obd_export */ |