1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
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29 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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32 * Copyright (c) 2011, 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 /** \defgroup obd_export PortalRPC export definitions
46 /** \defgroup export export
51 #include <lprocfs_status.h>
52 #include <lustre/lustre_idl.h>
53 #include <lustre_dlm.h>
55 struct mds_client_data;
56 struct mdt_client_data;
57 struct mds_idmap_table;
58 struct mdt_idmap_table;
61 * Target-specific export data
63 struct tg_export_data {
64 /** Protects led_lcd below */
65 cfs_mutex_t ted_lcd_lock;
66 /** Per-client data for each export */
67 struct lsd_client_data *ted_lcd;
68 /** Offset of record in last_rcvd file */
70 /** Client index in last_rcvd file */
75 * MDT-specific export data
77 struct mdt_export_data {
78 struct tg_export_data med_ted;
79 /** List of all files opened by client on this MDT */
80 cfs_list_t med_open_head;
81 cfs_spinlock_t med_open_lock; /* lock med_open_head, mfd_list*/
82 /** Bitmask of all ibit locks this MDT understands */
83 __u64 med_ibits_known;
84 cfs_mutex_t med_idmap_mutex;
85 struct lustre_idmap_table *med_idmap;
89 cfs_spinlock_t oscc_lock;
90 cfs_list_t oscc_wait_create_list;
91 struct obd_device *oscc_obd;
92 obd_id oscc_last_id;//last available pre-created object
93 obd_id oscc_next_id;// what object id to give out next
96 * Limit oscc_grow_count value, can be changed via proc fs
98 int oscc_max_grow_count;
101 cfs_waitq_t oscc_waitq; /* creating procs wait on this */
104 struct ec_export_data { /* echo client */
105 cfs_list_t eced_locks;
108 /* In-memory access to client data from OST struct */
109 /** Filter (oss-side) specific import data */
110 struct filter_export_data {
111 struct tg_export_data fed_ted;
112 cfs_spinlock_t fed_lock; /**< protects fed_mod_list */
113 long fed_dirty; /* in bytes */
114 long fed_grant; /* in bytes */
115 cfs_list_t fed_mod_list; /* files being modified */
116 int fed_mod_count;/* items in fed_writing list */
117 long fed_pending; /* bytes just being written */
121 struct mgs_export_data {
122 cfs_list_t med_clients; /* mgc fs client via this exp */
123 cfs_spinlock_t med_lock; /* protect med_clients */
127 * per-NID statistics structure.
128 * It tracks access patterns to this export on a per-client-NID basis
130 typedef struct nid_stat {
132 cfs_hlist_node_t nid_hash;
134 struct obd_device *nid_obd;
135 struct proc_dir_entry *nid_proc;
136 struct lprocfs_stats *nid_stats;
137 struct lprocfs_stats *nid_ldlm_stats;
138 struct brw_stats *nid_brw_stats;
139 cfs_atomic_t nid_exp_ref_count; /* for obd_nid_stats_hash
143 #define nidstat_getref(nidstat) \
145 cfs_atomic_inc(&(nidstat)->nid_exp_ref_count); \
148 #define nidstat_putref(nidstat) \
150 cfs_atomic_dec(&(nidstat)->nid_exp_ref_count); \
151 LASSERTF(cfs_atomic_read(&(nidstat)->nid_exp_ref_count) >= 0, \
152 "stat %p nid_exp_ref_count < 0\n", nidstat); \
156 OBD_OPT_FORCE = 0x0001,
157 OBD_OPT_FAILOVER = 0x0002,
158 OBD_OPT_ABORT_RECOV = 0x0004,
162 * Export structure. Represents target-side of connection in portals.
163 * Also used in Lustre to connect between layers on the same node when
164 * there is no network-connection in-between.
165 * For every connected client there is an export structure on the server
166 * attached to the same obd device.
170 * Export handle, it's id is provided to client on connect
171 * Subsequent client RPCs contain this handle id to identify
172 * what export they are talking to.
174 struct portals_handle exp_handle;
175 cfs_atomic_t exp_refcount;
177 * Set of counters below is to track where export references are
178 * kept. The exp_rpc_count is used for reconnect handling also,
179 * the cb_count and locks_count are for debug purposes only for now.
180 * The sum of them should be less than exp_refcount by 3
182 cfs_atomic_t exp_rpc_count; /* RPC references */
183 cfs_atomic_t exp_cb_count; /* Commit callback references */
184 cfs_atomic_t exp_locks_count; /** Lock references */
185 #if LUSTRE_TRACKS_LOCK_EXP_REFS
186 cfs_list_t exp_locks_list;
187 cfs_spinlock_t exp_locks_list_guard;
189 /** Number of queued replay requests to be processes */
190 cfs_atomic_t exp_replay_count;
191 /** UUID of client connected to this export */
192 struct obd_uuid exp_client_uuid;
193 /** To link all exports on an obd device */
194 cfs_list_t exp_obd_chain;
195 cfs_hlist_node_t exp_uuid_hash; /** uuid-export hash*/
196 cfs_hlist_node_t exp_nid_hash; /** nid-export hash */
198 * All exports eligible for ping evictor are linked into a list
199 * through this field in "most time since last request on this export"
201 * protected by obd_dev_lock
203 cfs_list_t exp_obd_chain_timed;
204 /** Obd device of this export */
205 struct obd_device *exp_obd;
206 /** "reverse" import to send requests (e.g. from ldlm) back to client */
207 struct obd_import *exp_imp_reverse;
208 struct nid_stat *exp_nid_stats;
209 struct lprocfs_stats *exp_md_stats;
210 /** Active connetion */
211 struct ptlrpc_connection *exp_connection;
212 /** Connection count value from last succesful reconnect rpc */
214 /** Hash list of all ldlm locks granted on this export */
215 cfs_hash_t *exp_lock_hash;
216 /** Lock protecting access to exp_flock_wait_list */
217 cfs_rwlock_t exp_flock_wait_lock;
219 * Wait queue for Posix lock deadlock detection, added with
220 * ldlm_lock::l_flock_waitq.
222 cfs_list_t exp_flock_wait_list;
223 cfs_list_t exp_outstanding_replies;
224 cfs_list_t exp_uncommitted_replies;
225 cfs_spinlock_t exp_uncommitted_replies_lock;
226 /** Last committed transno for this export */
227 __u64 exp_last_committed;
228 /** When was last request received */
229 cfs_time_t exp_last_request_time;
230 /** On replay all requests waiting for replay are linked here */
231 cfs_list_t exp_req_replay_queue;
232 /** protects exp_flags and exp_outstanding_replies */
233 cfs_spinlock_t exp_lock;
234 /** Compatibility flags for this export */
235 __u64 exp_connect_flags;
236 enum obd_option exp_flags;
237 unsigned long exp_failed:1,
241 /** VBR: export missed recovery */
243 /** VBR: failed version checking */
245 exp_req_replay_needed:1,
246 exp_lock_replay_needed:1,
250 exp_libclient:1, /* liblustre client? */
251 /* client timed out and tried to reconnect,
252 * but couldn't because of active rpcs */
253 exp_abort_active_req:1;
254 /* also protected by exp_lock */
255 enum lustre_sec_part exp_sp_peer;
256 struct sptlrpc_flavor exp_flvr; /* current */
257 struct sptlrpc_flavor exp_flvr_old[2]; /* about-to-expire */
258 cfs_time_t exp_flvr_expire[2]; /* seconds */
260 /** protects exp_hp_rpcs */
261 cfs_spinlock_t exp_rpc_lock;
262 cfs_list_t exp_hp_rpcs; /* (potential) HP RPCs */
264 /** blocking dlm lock list, protected by exp_bl_list_lock */
265 cfs_list_t exp_bl_list;
266 cfs_spinlock_t exp_bl_list_lock;
268 /** Target specific data */
270 struct tg_export_data eu_target_data;
271 struct mdt_export_data eu_mdt_data;
272 struct filter_export_data eu_filter_data;
273 struct ec_export_data eu_ec_data;
274 struct mgs_export_data eu_mgs_data;
278 #define exp_target_data u.eu_target_data
279 #define exp_mdt_data u.eu_mdt_data
280 #define exp_filter_data u.eu_filter_data
281 #define exp_ec_data u.eu_ec_data
283 static inline int exp_expired(struct obd_export *exp, cfs_duration_t age)
285 LASSERT(exp->exp_delayed);
286 return cfs_time_before(cfs_time_add(exp->exp_last_request_time, age),
287 cfs_time_current_sec());
290 static inline int exp_connect_cancelset(struct obd_export *exp)
292 LASSERT(exp != NULL);
293 return !!(exp->exp_connect_flags & OBD_CONNECT_CANCELSET);
296 static inline int exp_connect_lru_resize(struct obd_export *exp)
298 LASSERT(exp != NULL);
299 return !!(exp->exp_connect_flags & OBD_CONNECT_LRU_RESIZE);
302 static inline int exp_connect_rmtclient(struct obd_export *exp)
304 LASSERT(exp != NULL);
305 return !!(exp->exp_connect_flags & OBD_CONNECT_RMT_CLIENT);
308 static inline int client_is_remote(struct obd_export *exp)
310 struct obd_import *imp = class_exp2cliimp(exp);
312 return !!(imp->imp_connect_data.ocd_connect_flags &
313 OBD_CONNECT_RMT_CLIENT);
316 static inline int exp_connect_vbr(struct obd_export *exp)
318 LASSERT(exp != NULL);
319 LASSERT(exp->exp_connection);
320 return !!(exp->exp_connect_flags & OBD_CONNECT_VBR);
323 static inline int exp_connect_som(struct obd_export *exp)
325 LASSERT(exp != NULL);
326 return !!(exp->exp_connect_flags & OBD_CONNECT_SOM);
329 static inline int imp_connect_lru_resize(struct obd_import *imp)
331 struct obd_connect_data *ocd;
333 LASSERT(imp != NULL);
334 ocd = &imp->imp_connect_data;
335 return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
338 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
339 extern struct obd_device *class_conn2obd(struct lustre_handle *conn);
343 #endif /* __EXPORT_H */