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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.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2015, 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 <uapi/linux/lustre/lustre_idl.h>
#include <lustre_dlm.h>
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*/
/** 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 lprocfs_stats *exp_md_stats;
/** Active connection */
struct ptlrpc_connection *exp_connection;
/** Connection count value from last successful reconnect rpc */
__u32 exp_conn_cnt;
/** Hash list of all ldlm locks granted on this export */
struct cfs_hash *exp_lock_hash;
/**
* Hash list for Posix lock deadlock detection, added with
* ldlm_lock::l_exp_flock_hash.
*/
struct cfs_hash *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;
/** 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_disconnected:1,
exp_connecting:1,
exp_flvr_changed:1,
exp_flvr_adapt: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 */
time64_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;
};
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)
{
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_connect_cancelset(struct obd_export *exp)
{
return !!(exp_connect_flags(exp) & OBD_CONNECT_CANCELSET);
}
static inline int exp_connect_lru_resize(struct obd_export *exp)
{
return !!(exp_connect_flags(exp) & OBD_CONNECT_LRU_RESIZE);
}
static inline int exp_connect_vbr(struct obd_export *exp)
{
return !!(exp_connect_flags(exp) & OBD_CONNECT_VBR);
}
static inline int exp_connect_som(struct obd_export *exp)
{
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;
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)
{
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;
ocd = &imp->imp_connect_data;
if (ocd->ocd_connect_flags & OBD_CONNECT_LVB_TYPE)
return true;
else
return false;
}
static inline __u64 exp_connect_ibits(struct obd_export *exp)
{
struct obd_connect_data *ocd;
ocd = &exp->exp_connect_data;
return ocd->ocd_ibits_known;
}
static inline bool imp_connect_disp_stripe(struct obd_import *imp)
{
struct obd_connect_data *ocd;
ocd = &imp->imp_connect_data;
return ocd->ocd_connect_flags & OBD_CONNECT_DISP_STRIPE;
}
struct obd_export *class_conn2export(struct lustre_handle *conn);
#define KKUC_CT_DATA_MAGIC 0x092013cea
struct kkuc_ct_data {
__u32 kcd_magic;
struct obd_uuid kcd_uuid;
__u32 kcd_archive;
};
/** @} export */
#endif /* __EXPORT_H */
/** @} obd_export */
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