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* 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 */
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