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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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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 ted_lcd, ted_reply_* and
63 * ted_release_* fields below */
64 struct mutex ted_lcd_lock;
65 /** Per-client data for each export */
66 struct lsd_client_data *ted_lcd;
67 /** Offset of record in last_rcvd file */
69 /** Client index in last_rcvd file */
73 * ted_nodemap_lock is used to ensure that the nodemap is not destroyed
74 * between the time that ted_nodemap is checked for NULL, and a
75 * reference is taken. Modifications to ted_nodemap require that the
76 * active_config_lock and the nodemap(s)'s nm_member_list_lock be
77 * taken, as well as ted_nodemap_lock, so the export can be properly
78 * added to or removed from the nodemap's member list. When an export
79 * is added to a nodemap, a reference on that nodemap must be taken.
80 * That reference can be put only after ted_nodemap no longer refers to
83 spinlock_t ted_nodemap_lock;
84 struct lu_nodemap *ted_nodemap;
85 struct list_head ted_nodemap_member;
87 /* Every reply data fields below are
88 * protected by ted_lcd_lock */
89 /** List of reply data */
90 struct list_head ted_reply_list;
92 /** Reply data with highest transno is retained */
93 struct tg_reply_data *ted_reply_last;
95 int ted_reply_max; /* high water mark */
101 * MDT-specific export data
103 struct mdt_export_data {
104 struct tg_export_data med_ted;
105 /** List of all files opened by client on this MDT */
106 struct list_head med_open_head;
107 spinlock_t med_open_lock; /* med_open_head, mfd_list */
108 struct mutex med_idmap_mutex;
109 struct lustre_idmap_table *med_idmap;
112 struct ec_export_data { /* echo client */
113 struct list_head eced_locks;
116 /* In-memory access to client data from OST struct */
117 /** Filter (oss-side) specific import data */
118 struct filter_export_data {
119 struct tg_export_data fed_ted;
120 spinlock_t fed_lock; /**< protects fed_mod_list */
121 __u64 fed_lastid_gen;
122 long fed_dirty; /* in bytes */
123 long fed_grant; /* in bytes */
124 struct list_head fed_mod_list; /* files being modified */
125 long fed_pending; /* bytes just being written */
126 /* count of SOFT_SYNC RPCs, which will be reset after
127 * ofd_soft_sync_limit number of RPCs, and trigger a sync. */
128 atomic_t fed_soft_sync_count;
129 int fed_mod_count;/* items in fed_writing list */
131 __u8 fed_pagebits; /* log2 of client page size */
134 struct mgs_export_data {
135 struct list_head med_clients; /* mgc fs client via this exp */
136 spinlock_t med_lock; /* protect med_clients */
140 * per-NID statistics structure.
141 * It tracks access patterns to this export on a per-client-NID basis
145 struct hlist_node nid_hash;
146 struct list_head nid_list;
147 struct obd_device *nid_obd;
148 struct proc_dir_entry *nid_proc;
149 struct lprocfs_stats *nid_stats;
150 struct lprocfs_stats *nid_ldlm_stats;
151 atomic_t nid_exp_ref_count; /* for obd_nid_stats_hash
155 #define nidstat_getref(nidstat) \
157 atomic_inc(&(nidstat)->nid_exp_ref_count); \
160 #define nidstat_putref(nidstat) \
162 atomic_dec(&(nidstat)->nid_exp_ref_count); \
163 LASSERTF(atomic_read(&(nidstat)->nid_exp_ref_count) >= 0, \
164 "stat %p nid_exp_ref_count < 0\n", nidstat); \
168 OBD_OPT_FORCE = 0x0001,
169 OBD_OPT_FAILOVER = 0x0002,
170 OBD_OPT_ABORT_RECOV = 0x0004,
174 * Export structure. Represents target-side of connection in portals.
175 * Also used in Lustre to connect between layers on the same node when
176 * there is no network-connection in-between.
177 * For every connected client there is an export structure on the server
178 * attached to the same obd device.
182 * Export handle, it's id is provided to client on connect
183 * Subsequent client RPCs contain this handle id to identify
184 * what export they are talking to.
186 struct portals_handle exp_handle;
187 atomic_t exp_refcount;
189 * Set of counters below is to track where export references are
190 * kept. The exp_rpc_count is used for reconnect handling also,
191 * the cb_count and locks_count are for debug purposes only for now.
192 * The sum of them should be less than exp_refcount by 3
194 atomic_t exp_rpc_count; /* RPC references */
195 atomic_t exp_cb_count; /* Commit callback references */
196 /** Number of queued replay requests to be processes */
197 atomic_t exp_replay_count;
198 atomic_t exp_locks_count; /** Lock references */
199 #if LUSTRE_TRACKS_LOCK_EXP_REFS
200 struct list_head exp_locks_list;
201 spinlock_t exp_locks_list_guard;
203 /** UUID of client connected to this export */
204 struct obd_uuid exp_client_uuid;
205 /** To link all exports on an obd device */
206 struct list_head exp_obd_chain;
207 /* Unlinked export list */
208 struct list_head exp_stale_list;
209 struct hlist_node exp_uuid_hash; /** uuid-export hash*/
210 struct hlist_node exp_nid_hash; /** nid-export hash */
211 struct hlist_node exp_gen_hash; /** last_rcvd clt gen hash */
213 * All exports eligible for ping evictor are linked into a list
214 * through this field in "most time since last request on this export"
216 * protected by obd_dev_lock
218 struct list_head exp_obd_chain_timed;
219 /** Obd device of this export */
220 struct obd_device *exp_obd;
222 * "reverse" import to send requests (e.g. from ldlm) back to client
223 * exp_lock protect its change
225 struct obd_import *exp_imp_reverse;
226 struct nid_stat *exp_nid_stats;
227 /** Active connetion */
228 struct ptlrpc_connection *exp_connection;
229 /** Connection count value from last successful reconnect rpc */
231 /** Hash list of all ldlm locks granted on this export */
232 struct cfs_hash *exp_lock_hash;
234 * Hash list for Posix lock deadlock detection, added with
235 * ldlm_lock::l_exp_flock_hash.
237 struct cfs_hash *exp_flock_hash;
238 struct list_head exp_outstanding_replies;
239 struct list_head exp_uncommitted_replies;
240 spinlock_t exp_uncommitted_replies_lock;
241 /** Last committed transno for this export */
242 __u64 exp_last_committed;
243 /** When was last request received */
244 cfs_time_t exp_last_request_time;
245 /** On replay all requests waiting for replay are linked here */
246 struct list_head exp_req_replay_queue;
248 * protects exp_flags, exp_outstanding_replies and the change
252 /** Compatibility flags for this export are embedded into
253 * exp_connect_data */
254 struct obd_connect_data exp_connect_data;
255 enum obd_option exp_flags;
256 unsigned long exp_failed:1,
260 /** VBR: export missed recovery */
262 /** VBR: failed version checking */
264 exp_req_replay_needed:1,
265 exp_lock_replay_needed:1,
269 exp_libclient:1, /* liblustre client? */
270 /* if to swap nidtbl entries for 2.2 clients.
271 * Only used by the MGS to fix LU-1644. */
273 /* also protected by exp_lock */
274 enum lustre_sec_part exp_sp_peer;
275 struct sptlrpc_flavor exp_flvr; /* current */
276 struct sptlrpc_flavor exp_flvr_old[2]; /* about-to-expire */
277 cfs_time_t exp_flvr_expire[2]; /* seconds */
279 /** protects exp_hp_rpcs */
280 spinlock_t exp_rpc_lock;
281 struct list_head exp_hp_rpcs; /* (potential) HP RPCs */
282 struct list_head exp_reg_rpcs; /* RPC being handled */
284 /** blocking dlm lock list, protected by exp_bl_list_lock */
285 struct list_head exp_bl_list;
286 spinlock_t exp_bl_list_lock;
288 /** Target specific data */
290 struct tg_export_data eu_target_data;
291 struct mdt_export_data eu_mdt_data;
292 struct filter_export_data eu_filter_data;
293 struct ec_export_data eu_ec_data;
294 struct mgs_export_data eu_mgs_data;
297 struct adaptive_timeout exp_bl_lock_at;
299 /** highest XID received by export client that has no
300 * unreceived lower-numbered XID
305 #define exp_target_data u.eu_target_data
306 #define exp_mdt_data u.eu_mdt_data
307 #define exp_filter_data u.eu_filter_data
308 #define exp_ec_data u.eu_ec_data
310 static inline __u64 *exp_connect_flags_ptr(struct obd_export *exp)
312 return &exp->exp_connect_data.ocd_connect_flags;
315 static inline __u64 exp_connect_flags(struct obd_export *exp)
317 return *exp_connect_flags_ptr(exp);
320 static inline int exp_max_brw_size(struct obd_export *exp)
322 LASSERT(exp != NULL);
323 if (exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE)
324 return exp->exp_connect_data.ocd_brw_size;
326 return ONE_MB_BRW_SIZE;
329 static inline int exp_connect_multibulk(struct obd_export *exp)
331 return exp_max_brw_size(exp) > ONE_MB_BRW_SIZE;
334 static inline int exp_expired(struct obd_export *exp, cfs_duration_t age)
336 LASSERT(exp->exp_delayed);
337 return cfs_time_before(cfs_time_add(exp->exp_last_request_time, age),
338 cfs_time_current_sec());
341 static inline int exp_connect_cancelset(struct obd_export *exp)
343 LASSERT(exp != NULL);
344 return !!(exp_connect_flags(exp) & OBD_CONNECT_CANCELSET);
347 static inline int exp_connect_lru_resize(struct obd_export *exp)
349 LASSERT(exp != NULL);
350 return !!(exp_connect_flags(exp) & OBD_CONNECT_LRU_RESIZE);
353 static inline int exp_connect_rmtclient(struct obd_export *exp)
355 LASSERT(exp != NULL);
356 return !!(exp_connect_flags(exp) & OBD_CONNECT_RMT_CLIENT);
359 static inline int client_is_remote(struct obd_export *exp)
361 struct obd_import *imp = class_exp2cliimp(exp);
363 return !!(imp->imp_connect_data.ocd_connect_flags &
364 OBD_CONNECT_RMT_CLIENT);
367 static inline int exp_connect_vbr(struct obd_export *exp)
369 LASSERT(exp != NULL);
370 LASSERT(exp->exp_connection);
371 return !!(exp_connect_flags(exp) & OBD_CONNECT_VBR);
374 static inline int exp_connect_umask(struct obd_export *exp)
376 return !!(exp_connect_flags(exp) & OBD_CONNECT_UMASK);
379 static inline int imp_connect_lru_resize(struct obd_import *imp)
381 struct obd_connect_data *ocd;
383 LASSERT(imp != NULL);
384 ocd = &imp->imp_connect_data;
385 return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
388 static inline int exp_connect_layout(struct obd_export *exp)
390 return !!(exp_connect_flags(exp) & OBD_CONNECT_LAYOUTLOCK);
393 static inline bool exp_connect_lvb_type(struct obd_export *exp)
395 LASSERT(exp != NULL);
396 if (exp_connect_flags(exp) & OBD_CONNECT_LVB_TYPE)
402 static inline bool imp_connect_lvb_type(struct obd_import *imp)
404 struct obd_connect_data *ocd;
406 LASSERT(imp != NULL);
407 ocd = &imp->imp_connect_data;
408 if (ocd->ocd_connect_flags & OBD_CONNECT_LVB_TYPE)
414 static inline bool imp_connect_disp_stripe(struct obd_import *imp)
416 struct obd_connect_data *ocd;
418 LASSERT(imp != NULL);
419 ocd = &imp->imp_connect_data;
420 return ocd->ocd_connect_flags & OBD_CONNECT_DISP_STRIPE;
423 static inline __u64 exp_connect_ibits(struct obd_export *exp)
425 struct obd_connect_data *ocd;
427 ocd = &exp->exp_connect_data;
428 return ocd->ocd_ibits_known;
431 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
432 extern struct obd_device *class_conn2obd(struct lustre_handle *conn);
434 #define KKUC_CT_DATA_MAGIC 0x092013cea
435 struct kkuc_ct_data {
437 struct obd_uuid kcd_uuid;
443 #endif /* __EXPORT_H */