X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Finclude%2Flustre_import.h;h=339a232a7c880464042aa76563270699ce2023cf;hb=303f41aa0ff07a43a31e397a3d163a6b8b6e4864;hp=badfe44d62fb3d5ecbacb5bbca26b90426ecde56;hpb=fb4073bc3cfbf1a7ad17b03270e986098a2869ee;p=fs%2Flustre-release.git diff --git a/lustre/include/lustre_import.h b/lustre/include/lustre_import.h index badfe44..339a232 100644 --- a/lustre/include/lustre_import.h +++ b/lustre/include/lustre_import.h @@ -26,13 +26,18 @@ * GPL HEADER END */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved + * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. */ +/** \defgroup obd_import PtlRPC import definitions + * Imports are client-side representation of remote obd target. + * + * @{ + */ #ifndef __IMPORT_H #define __IMPORT_H @@ -46,7 +51,11 @@ #include -/* Adaptive Timeout stuff */ +/** + * Adaptive Timeout stuff + * + * @{ + */ #define D_ADAPTTO D_OTHER #define AT_BINS 4 /* "bin" means "N seconds of history" */ #define AT_FLG_NOHIST 0x1 /* use last reported value only */ @@ -61,6 +70,25 @@ struct adaptive_timeout { cfs_spinlock_t at_lock; }; +struct ptlrpc_at_array { + cfs_list_t *paa_reqs_array; /** array to hold requests */ + __u32 paa_size; /** the size of array */ + __u32 paa_count; /** the total count of reqs */ + time_t paa_deadline; /** the earliest deadline of reqs */ + __u32 *paa_reqs_count; /** the count of reqs in each entry */ +}; + +#define IMP_AT_MAX_PORTALS 8 +struct imp_at { + int iat_portal[IMP_AT_MAX_PORTALS]; + struct adaptive_timeout iat_net_latency; + struct adaptive_timeout iat_service_estimate[IMP_AT_MAX_PORTALS]; +}; + + +/** @} */ + +/** Possible import states */ enum lustre_imp_state { LUSTRE_IMP_CLOSED = 1, LUSTRE_IMP_NEW = 2, @@ -74,14 +102,7 @@ enum lustre_imp_state { LUSTRE_IMP_EVICTED = 10, }; -struct ptlrpc_at_array { - cfs_list_t *paa_reqs_array; /* array to hold requests */ - __u32 paa_size; /* the size of array */ - __u32 paa_count; /* the total count of reqs */ - time_t paa_deadline; /* earliest deadline of reqs */ - __u32 *paa_reqs_count; /* count of reqs in each entry */ -}; - +/** Returns test string representation of numeric import state \a state */ static inline char * ptlrpc_import_state_name(enum lustre_imp_state state) { static char* import_state_names[] = { @@ -94,26 +115,33 @@ static inline char * ptlrpc_import_state_name(enum lustre_imp_state state) return import_state_names[state]; } +/** + * List of import event types + */ enum obd_import_event { IMP_EVENT_DISCON = 0x808001, IMP_EVENT_INACTIVE = 0x808002, IMP_EVENT_INVALIDATE = 0x808003, IMP_EVENT_ACTIVE = 0x808004, IMP_EVENT_OCD = 0x808005, + IMP_EVENT_DEACTIVATE = 0x808006, + IMP_EVENT_ACTIVATE = 0x808007, }; +/** + * Definition of import connection structure + */ struct obd_import_conn { + /** Item for linking connections together */ cfs_list_t oic_item; + /** Pointer to actual PortalRPC connection */ struct ptlrpc_connection *oic_conn; + /** uuid of remote side */ struct obd_uuid oic_uuid; - __u64 oic_last_attempt; /* jiffies, 64-bit */ -}; - -#define IMP_AT_MAX_PORTALS 8 -struct imp_at { - int iat_portal[IMP_AT_MAX_PORTALS]; - struct adaptive_timeout iat_net_latency; - struct adaptive_timeout iat_service_estimate[IMP_AT_MAX_PORTALS]; + /** + * Time (64 bit jiffies) of last connection attempt on this connection + */ + __u64 oic_last_attempt; }; /* state history */ @@ -123,51 +151,103 @@ struct import_state_hist { time_t ish_time; }; +/** + * Defintion of PortalRPC import structure. + * Imports are representing client-side view to remote target. + */ struct obd_import { + /** Local handle (== id) for this import. */ struct portals_handle imp_handle; + /** Reference counter */ cfs_atomic_t imp_refcount; struct lustre_handle imp_dlm_handle; /* client's ldlm export */ + /** Currently active connection */ struct ptlrpc_connection *imp_connection; + /** PortalRPC client structure for this import */ struct ptlrpc_client *imp_client; + /** List element for linking into pinger chain */ cfs_list_t imp_pinger_chain; - cfs_list_t imp_zombie_chain; /* queue for destruction */ + /** List element for linking into chain for destruction */ + cfs_list_t imp_zombie_chain; - /* Lists of requests that are retained for replay, waiting for a reply, + /** + * Lists of requests that are retained for replay, waiting for a reply, * or waiting for recovery to complete, respectively. + * @{ */ cfs_list_t imp_replay_list; cfs_list_t imp_sending_list; cfs_list_t imp_delayed_list; + /** @} */ + /** obd device for this import */ struct obd_device *imp_obd; + + /** + * some seciruty-related fields + * @{ + */ struct ptlrpc_sec *imp_sec; cfs_semaphore_t imp_sec_mutex; cfs_time_t imp_sec_expire; + /** @} */ + + /** Wait queue for those who need to wait for recovery completion */ cfs_waitq_t imp_recovery_waitq; + /** Number of requests currently in-flight */ cfs_atomic_t imp_inflight; + /** Number of requests currently unregistering */ cfs_atomic_t imp_unregistering; + /** Number of replay requests inflight */ cfs_atomic_t imp_replay_inflight; - cfs_atomic_t imp_inval_count; /* in-progress invalidations */ + /** Number of currently happening import invalidations */ + cfs_atomic_t imp_inval_count; + /** Numbner of request timeouts */ cfs_atomic_t imp_timeouts; + /** Current import state */ enum lustre_imp_state imp_state; + /** History of import states */ struct import_state_hist imp_state_hist[IMP_STATE_HIST_LEN]; int imp_state_hist_idx; + /** Current import generation. Incremented on every reconnect */ int imp_generation; + /** Incremented every time we send reconnection request */ __u32 imp_conn_cnt; + /** + * \see ptlrpc_free_committed remembers imp_generation value here + * after a check to save on unnecessary replay list iterations + */ int imp_last_generation_checked; + /** Last tranno we replayed */ __u64 imp_last_replay_transno; + /** Last transno committed on remote side */ __u64 imp_peer_committed_transno; + /** + * \see ptlrpc_free_committed remembers last_transno since its last + * check here and if last_transno did not change since last run of + * ptlrpc_free_committed and import generation is the same, we can + * skip looking for requests to remove from replay list as optimisation + */ __u64 imp_last_transno_checked; + /** + * Remote export handle. This is how remote side knows what export + * we are talking to. Filled from response to connect request + */ struct lustre_handle imp_remote_handle; - cfs_time_t imp_next_ping; /* jiffies */ - __u64 imp_last_success_conn; /* jiffies, 64-bit */ + /** When to perform next ping. time in jiffies. */ + cfs_time_t imp_next_ping; + /** When we last succesfully connected. time in 64bit jiffies */ + __u64 imp_last_success_conn; - /* all available obd_import_conn linked here */ + /** List of all possible connection for import. */ cfs_list_t imp_conn_list; + /** + * Current connection. \a imp_connection is imp_conn_current->oic_conn + */ struct obd_import_conn *imp_conn_current; - /* Protects flags, level, generation, conn_cnt, *_list */ + /** Protects flags, level, generation, conn_cnt, *_list */ cfs_spinlock_t imp_lock; /* flags */ @@ -201,6 +281,12 @@ struct obd_import { typedef void (*obd_import_callback)(struct obd_import *imp, void *closure, int event, void *event_arg, void *cb_data); +/** + * Structure for import observer. + * It is possible to register "observer" on an import and every time + * something happens to an import (like connect/evict/disconnect) + * obderver will get its callback called with event type + */ struct obd_import_observer { cfs_list_t oio_chain; obd_import_callback oio_cb; @@ -236,8 +322,9 @@ static inline void at_init(struct adaptive_timeout *at, int val, int flags) { at->at_flags = flags; cfs_spin_lock_init(&at->at_lock); } +extern unsigned int at_min; static inline int at_get(struct adaptive_timeout *at) { - return at->at_current; + return (at->at_current > at_min) ? at->at_current : at_min; } int at_measured(struct adaptive_timeout *at, unsigned int val); int import_at_get_index(struct obd_import *imp, int portal); @@ -252,3 +339,5 @@ extern struct obd_import *class_conn2cliimp(struct lustre_handle *); /** @} import */ #endif /* __IMPORT_H */ + +/** @} obd_import */