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Diffstat (limited to 'drivers/staging/lustre/lustre/include/lustre_export.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_export.h | 389 |
1 files changed, 389 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_export.h b/drivers/staging/lustre/lustre/include/lustre_export.h new file mode 100644 index 000000000000..d61c020a4643 --- /dev/null +++ b/drivers/staging/lustre/lustre/include/lustre_export.h @@ -0,0 +1,389 @@ +/* + * 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 */ |