1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
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8 * This program is free software; you can redistribute it and/or modify
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15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
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20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 /** \defgroup obd_export PortalRPC export definitions
44 /** \defgroup export export
49 #include <lprocfs_status.h>
50 #include <lustre/lustre_idl.h>
51 #include <lustre_dlm.h>
53 struct mds_client_data;
54 struct mdt_client_data;
55 struct mds_idmap_table;
56 struct mdt_idmap_table;
59 * Target-specific export data
61 struct tg_export_data {
62 /** Protects led_lcd below */
63 cfs_semaphore_t ted_lcd_lock;
64 /** Per-client data for each export */
65 struct lsd_client_data *ted_lcd;
66 /** Offset of record in last_rcvd file */
68 /** Client index in last_rcvd file */
73 * MDT-specific export data
75 struct mdt_export_data {
76 struct tg_export_data med_ted;
77 /** List of all files opened by client on this MDT */
78 cfs_list_t med_open_head;
79 cfs_spinlock_t med_open_lock; /* lock med_open_head, mfd_list*/
80 /** Bitmask of all ibit locks this MDT understands */
81 __u64 med_ibits_known;
82 cfs_semaphore_t med_idmap_sem;
83 struct lustre_idmap_table *med_idmap;
87 cfs_spinlock_t oscc_lock;
88 cfs_list_t oscc_wait_create_list;
89 struct obd_device *oscc_obd;
90 obd_id oscc_last_id;//last available pre-created object
91 obd_id oscc_next_id;// what object id to give out next
94 * Limit oscc_grow_count value, can be changed via proc fs
96 int oscc_max_grow_count;
99 cfs_waitq_t oscc_waitq; /* creating procs wait on this */
102 struct ec_export_data { /* echo client */
103 cfs_list_t eced_locks;
106 /* In-memory access to client data from OST struct */
107 /** Filter (oss-side) specific import data */
108 struct filter_export_data {
109 struct tg_export_data fed_ted;
110 cfs_spinlock_t fed_lock; /**< protects fed_mod_list */
111 long fed_dirty; /* in bytes */
112 long fed_grant; /* in bytes */
113 cfs_list_t fed_mod_list; /* files being modified */
114 int fed_mod_count;/* items in fed_writing list */
115 long fed_pending; /* bytes just being written */
119 struct mgs_export_data {
120 cfs_list_t med_clients; /* mgc fs client via this exp */
121 cfs_spinlock_t med_lock; /* protect med_clients */
125 * per-NID statistics structure.
126 * It tracks access patterns to this export on a per-client-NID basis
128 typedef struct nid_stat {
130 cfs_hlist_node_t nid_hash;
132 struct obd_device *nid_obd;
133 struct proc_dir_entry *nid_proc;
134 struct lprocfs_stats *nid_stats;
135 struct lprocfs_stats *nid_ldlm_stats;
136 struct brw_stats *nid_brw_stats;
137 cfs_atomic_t nid_exp_ref_count; /* for obd_nid_stats_hash
141 #define nidstat_getref(nidstat) \
143 cfs_atomic_inc(&(nidstat)->nid_exp_ref_count); \
146 #define nidstat_putref(nidstat) \
148 cfs_atomic_dec(&(nidstat)->nid_exp_ref_count); \
149 LASSERTF(cfs_atomic_read(&(nidstat)->nid_exp_ref_count) >= 0, \
150 "stat %p nid_exp_ref_count < 0\n", nidstat); \
154 OBD_OPT_FORCE = 0x0001,
155 OBD_OPT_FAILOVER = 0x0002,
156 OBD_OPT_ABORT_RECOV = 0x0004,
160 * Export structure. Represents target-side of connection in portals.
161 * Also used in Lustre to connect between layers on the same node when
162 * there is no network-connection in-between.
163 * For every connected client there is an export structure on the server
164 * attached to the same obd device.
168 * Export handle, it's id is provided to client on connect
169 * Subsequent client RPCs contain this handle id to identify
170 * what export they are talking to.
172 struct portals_handle exp_handle;
173 cfs_atomic_t exp_refcount;
175 * Set of counters below is to track where export references are
176 * kept. The exp_rpc_count is used for reconnect handling also,
177 * the cb_count and locks_count are for debug purposes only for now.
178 * The sum of them should be less than exp_refcount by 3
180 cfs_atomic_t exp_rpc_count; /* RPC references */
181 cfs_atomic_t exp_cb_count; /* Commit callback references */
182 cfs_atomic_t exp_locks_count; /** Lock references */
183 #if LUSTRE_TRACKS_LOCK_EXP_REFS
184 cfs_list_t exp_locks_list;
185 cfs_spinlock_t exp_locks_list_guard;
187 /** Number of queued replay requests to be processes */
188 cfs_atomic_t exp_replay_count;
189 /** UUID of client connected to this export */
190 struct obd_uuid exp_client_uuid;
191 /** To link all exports on an obd device */
192 cfs_list_t exp_obd_chain;
193 cfs_hlist_node_t exp_uuid_hash; /** uuid-export hash*/
194 cfs_hlist_node_t exp_nid_hash; /** nid-export hash */
196 * All exports eligible for ping evictor are linked into a list
197 * through this field in "most time since last request on this export"
199 * protected by obd_dev_lock
201 cfs_list_t exp_obd_chain_timed;
202 /** Obd device of this export */
203 struct obd_device *exp_obd;
204 /** "reverse" import to send requests (e.g. from ldlm) back to client */
205 struct obd_import *exp_imp_reverse;
206 struct nid_stat *exp_nid_stats;
207 struct lprocfs_stats *exp_md_stats;
208 /** Active connetion */
209 struct ptlrpc_connection *exp_connection;
210 /** Connection count value from last succesful reconnect rpc */
212 /** Hash list of all ldlm locks granted on this export */
213 cfs_hash_t *exp_lock_hash;
214 /** lock to protect exp_lock_hash accesses */
215 cfs_spinlock_t exp_lock_hash_lock;
216 cfs_list_t exp_outstanding_replies;
217 cfs_list_t exp_uncommitted_replies;
218 cfs_spinlock_t exp_uncommitted_replies_lock;
219 /** Last committed transno for this export */
220 __u64 exp_last_committed;
221 /** When was last request received */
222 cfs_time_t exp_last_request_time;
223 /** On replay all requests waiting for replay are linked here */
224 cfs_list_t exp_req_replay_queue;
225 /** protects exp_flags and exp_outstanding_replies */
226 cfs_spinlock_t exp_lock;
227 /** Compatibility flags for this export */
228 __u64 exp_connect_flags;
229 enum obd_option exp_flags;
230 unsigned long exp_failed:1,
234 /** VBR: export missed recovery */
236 /** VBR: failed version checking */
238 exp_req_replay_needed:1,
239 exp_lock_replay_needed:1,
243 exp_libclient:1, /* liblustre client? */
244 /* client timed out and tried to reconnect,
245 * but couldn't because of active rpcs */
246 exp_abort_active_req:1;
247 /* also protected by exp_lock */
248 enum lustre_sec_part exp_sp_peer;
249 struct sptlrpc_flavor exp_flvr; /* current */
250 struct sptlrpc_flavor exp_flvr_old[2]; /* about-to-expire */
251 cfs_time_t exp_flvr_expire[2]; /* seconds */
253 /** protects exp_hp_rpcs */
254 cfs_spinlock_t exp_rpc_lock;
255 cfs_list_t exp_hp_rpcs; /* (potential) HP RPCs */
257 /** blocking dlm lock list, protected by exp_bl_list_lock */
258 cfs_list_t exp_bl_list;
259 cfs_spinlock_t exp_bl_list_lock;
261 /** Target specific data */
263 struct tg_export_data eu_target_data;
264 struct mdt_export_data eu_mdt_data;
265 struct filter_export_data eu_filter_data;
266 struct ec_export_data eu_ec_data;
267 struct mgs_export_data eu_mgs_data;
271 #define exp_target_data u.eu_target_data
272 #define exp_mdt_data u.eu_mdt_data
273 #define exp_filter_data u.eu_filter_data
274 #define exp_ec_data u.eu_ec_data
276 static inline int exp_expired(struct obd_export *exp, cfs_duration_t age)
278 LASSERT(exp->exp_delayed);
279 return cfs_time_before(cfs_time_add(exp->exp_last_request_time, age),
280 cfs_time_current_sec());
283 static inline int exp_connect_cancelset(struct obd_export *exp)
285 LASSERT(exp != NULL);
286 return !!(exp->exp_connect_flags & OBD_CONNECT_CANCELSET);
289 static inline int exp_connect_lru_resize(struct obd_export *exp)
291 LASSERT(exp != NULL);
292 return !!(exp->exp_connect_flags & OBD_CONNECT_LRU_RESIZE);
295 static inline int exp_connect_rmtclient(struct obd_export *exp)
297 LASSERT(exp != NULL);
298 return !!(exp->exp_connect_flags & OBD_CONNECT_RMT_CLIENT);
301 static inline int client_is_remote(struct obd_export *exp)
303 struct obd_import *imp = class_exp2cliimp(exp);
305 return !!(imp->imp_connect_data.ocd_connect_flags &
306 OBD_CONNECT_RMT_CLIENT);
309 static inline int exp_connect_vbr(struct obd_export *exp)
311 LASSERT(exp != NULL);
312 LASSERT(exp->exp_connection);
313 return !!(exp->exp_connect_flags & OBD_CONNECT_VBR);
316 static inline int exp_connect_som(struct obd_export *exp)
318 LASSERT(exp != NULL);
319 return !!(exp->exp_connect_flags & OBD_CONNECT_SOM);
322 static inline int imp_connect_lru_resize(struct obd_import *imp)
324 struct obd_connect_data *ocd;
326 LASSERT(imp != NULL);
327 ocd = &imp->imp_connect_data;
328 return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
331 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
332 extern struct obd_device *class_conn2obd(struct lustre_handle *conn);
336 #endif /* __EXPORT_H */