4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 /** \defgroup obd_export PortalRPC export definitions
40 /** \defgroup export export
45 #include <linux/workqueue.h>
47 #include <lprocfs_status.h>
48 #include <uapi/linux/lustre/lustre_idl.h>
49 #include <lustre_dlm.h>
51 struct mds_client_data;
52 struct mdt_client_data;
53 struct mds_idmap_table;
54 struct mdt_idmap_table;
57 * Target-specific export data
59 struct tg_export_data {
60 /** Protects ted_lcd, ted_reply_* and
61 * ted_release_* fields below */
62 struct mutex ted_lcd_lock;
63 /** Per-client data for each export */
64 struct lsd_client_data *ted_lcd;
65 /** Offset of record in last_rcvd file */
67 /** Client index in last_rcvd file */
71 * ted_nodemap_lock is used to ensure that the nodemap is not destroyed
72 * between the time that ted_nodemap is checked for NULL, and a
73 * reference is taken. Modifications to ted_nodemap require that the
74 * active_config_lock and the nodemap(s)'s nm_member_list_lock be
75 * taken, as well as ted_nodemap_lock, so the export can be properly
76 * added to or removed from the nodemap's member list. When an export
77 * is added to a nodemap, a reference on that nodemap must be taken.
78 * That reference can be put only after ted_nodemap no longer refers to
81 spinlock_t ted_nodemap_lock;
82 struct lu_nodemap *ted_nodemap;
83 struct list_head ted_nodemap_member;
85 /** last version of nodemap config sent to client */
86 __u64 ted_nodemap_version;
88 /* Every reply data fields below are
89 * protected by ted_lcd_lock */
90 /** List of reply data */
91 struct list_head ted_reply_list;
93 /** Reply data with highest transno is retained */
94 struct tg_reply_data *ted_reply_last;
96 int ted_reply_max; /* high water mark */
100 long ted_dirty; /* in bytes */
101 long ted_grant; /* in bytes */
102 long ted_pending; /* bytes just being written */
103 __u8 ted_pagebits; /* log2 of client page size */
107 * MDT-specific export data
109 struct mdt_export_data {
110 struct tg_export_data med_ted;
111 /** List of all files opened by client on this MDT */
112 struct list_head med_open_head;
113 spinlock_t med_open_lock; /* med_open_head, mfd_list */
116 struct ec_export_data { /* echo client */
117 struct list_head eced_locks;
120 /* In-memory access to client data from OST struct */
121 /** Filter (oss-side) specific import data */
122 struct filter_export_data {
123 struct tg_export_data fed_ted;
124 spinlock_t fed_lock; /**< protects fed_mod_list */
125 __u64 fed_lastid_gen;
126 struct list_head fed_mod_list; /* files being modified */
127 /* count of SOFT_SYNC RPCs, which will be reset after
128 * ofd_soft_sync_limit number of RPCs, and trigger a sync. */
129 atomic_t fed_soft_sync_count;
130 int fed_mod_count;/* items in fed_writing list */
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 /** work_struct for destruction of export */
208 struct work_struct exp_zombie_work;
209 /* Unlinked export list */
210 struct list_head exp_stale_list;
211 struct hlist_node exp_uuid_hash; /** uuid-export hash*/
212 struct hlist_node exp_nid_hash; /** nid-export hash */
213 struct hlist_node exp_gen_hash; /** last_rcvd clt gen hash */
215 * All exports eligible for ping evictor are linked into a list
216 * through this field in "most time since last request on this export"
218 * protected by obd_dev_lock
220 struct list_head exp_obd_chain_timed;
221 /** Obd device of this export */
222 struct obd_device *exp_obd;
224 * "reverse" import to send requests (e.g. from ldlm) back to client
225 * exp_lock protect its change
227 struct obd_import *exp_imp_reverse;
228 struct nid_stat *exp_nid_stats;
229 /** Active connetion */
230 struct ptlrpc_connection *exp_connection;
231 /** Connection count value from last successful reconnect rpc */
233 /** Hash list of all ldlm locks granted on this export */
234 struct cfs_hash *exp_lock_hash;
236 * Hash list for Posix lock deadlock detection, added with
237 * ldlm_lock::l_exp_flock_hash.
239 struct cfs_hash *exp_flock_hash;
240 struct list_head exp_outstanding_replies;
241 struct list_head exp_uncommitted_replies;
242 spinlock_t exp_uncommitted_replies_lock;
243 /** Last committed transno for this export */
244 __u64 exp_last_committed;
245 /** When was last request received */
246 time64_t exp_last_request_time;
247 /** On replay all requests waiting for replay are linked here */
248 struct list_head exp_req_replay_queue;
250 * protects exp_flags, exp_outstanding_replies and the change
254 /** Compatibility flags for this export are embedded into
255 * exp_connect_data */
256 struct obd_connect_data exp_connect_data;
257 enum obd_option exp_flags;
258 unsigned long exp_failed:1,
262 /** VBR: export missed recovery */
264 /** VBR: failed version checking */
266 exp_req_replay_needed:1,
267 exp_lock_replay_needed:1,
271 /* if to swap nidtbl entries for 2.2 clients.
272 * Only used by the MGS to fix LU-1644. */
274 /* The export already got final replay ping
277 /* also protected by exp_lock */
278 enum lustre_sec_part exp_sp_peer;
279 struct sptlrpc_flavor exp_flvr; /* current */
280 struct sptlrpc_flavor exp_flvr_old[2]; /* about-to-expire */
281 time64_t exp_flvr_expire[2]; /* seconds */
283 /** protects exp_hp_rpcs */
284 spinlock_t exp_rpc_lock;
285 struct list_head exp_hp_rpcs; /* (potential) HP RPCs */
286 struct list_head exp_reg_rpcs; /* RPC being handled */
288 /** blocking dlm lock list, protected by exp_bl_list_lock */
289 struct list_head exp_bl_list;
290 spinlock_t exp_bl_list_lock;
292 /** Target specific data */
294 struct tg_export_data eu_target_data;
295 struct mdt_export_data eu_mdt_data;
296 struct filter_export_data eu_filter_data;
297 struct ec_export_data eu_ec_data;
298 struct mgs_export_data eu_mgs_data;
301 struct adaptive_timeout exp_bl_lock_at;
303 /** highest XID received by export client that has no
304 * unreceived lower-numbered XID
309 #define exp_target_data u.eu_target_data
310 #define exp_mdt_data u.eu_mdt_data
311 #define exp_filter_data u.eu_filter_data
312 #define exp_ec_data u.eu_ec_data
314 static inline __u64 *exp_connect_flags_ptr(struct obd_export *exp)
316 return &exp->exp_connect_data.ocd_connect_flags;
319 static inline __u64 exp_connect_flags(struct obd_export *exp)
321 return *exp_connect_flags_ptr(exp);
324 static inline __u64 *exp_connect_flags2_ptr(struct obd_export *exp)
326 return &exp->exp_connect_data.ocd_connect_flags2;
329 static inline __u64 exp_connect_flags2(struct obd_export *exp)
331 if (exp_connect_flags(exp) & OBD_CONNECT_FLAGS2)
332 return *exp_connect_flags2_ptr(exp);
336 static inline int exp_max_brw_size(struct obd_export *exp)
338 LASSERT(exp != NULL);
339 if (exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE)
340 return exp->exp_connect_data.ocd_brw_size;
342 return ONE_MB_BRW_SIZE;
345 static inline int exp_connect_multibulk(struct obd_export *exp)
347 return exp_max_brw_size(exp) > ONE_MB_BRW_SIZE;
350 static inline int exp_connect_cancelset(struct obd_export *exp)
352 LASSERT(exp != NULL);
353 return !!(exp_connect_flags(exp) & OBD_CONNECT_CANCELSET);
356 static inline int exp_connect_lru_resize(struct obd_export *exp)
358 LASSERT(exp != NULL);
359 return !!(exp_connect_flags(exp) & OBD_CONNECT_LRU_RESIZE);
362 static inline int exp_connect_vbr(struct obd_export *exp)
364 LASSERT(exp != NULL);
365 LASSERT(exp->exp_connection);
366 return !!(exp_connect_flags(exp) & OBD_CONNECT_VBR);
369 static inline int exp_connect_umask(struct obd_export *exp)
371 return !!(exp_connect_flags(exp) & OBD_CONNECT_UMASK);
374 static inline int imp_connect_lru_resize(struct obd_import *imp)
376 struct obd_connect_data *ocd;
378 LASSERT(imp != NULL);
379 ocd = &imp->imp_connect_data;
380 return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
383 static inline int exp_connect_layout(struct obd_export *exp)
385 return !!(exp_connect_flags(exp) & OBD_CONNECT_LAYOUTLOCK);
388 static inline bool exp_connect_lvb_type(struct obd_export *exp)
390 LASSERT(exp != NULL);
391 if (exp_connect_flags(exp) & OBD_CONNECT_LVB_TYPE)
397 static inline bool imp_connect_lvb_type(struct obd_import *imp)
399 struct obd_connect_data *ocd;
401 LASSERT(imp != NULL);
402 ocd = &imp->imp_connect_data;
403 if (ocd->ocd_connect_flags & OBD_CONNECT_LVB_TYPE)
409 static inline bool imp_connect_disp_stripe(struct obd_import *imp)
411 struct obd_connect_data *ocd;
413 LASSERT(imp != NULL);
414 ocd = &imp->imp_connect_data;
415 return ocd->ocd_connect_flags & OBD_CONNECT_DISP_STRIPE;
418 static inline bool imp_connect_shortio(struct obd_import *imp)
420 struct obd_connect_data *ocd = &imp->imp_connect_data;
422 return ocd->ocd_connect_flags & OBD_CONNECT_SHORTIO;
425 static inline __u64 exp_connect_ibits(struct obd_export *exp)
427 struct obd_connect_data *ocd;
429 ocd = &exp->exp_connect_data;
430 return ocd->ocd_ibits_known;
433 static inline int exp_connect_large_acl(struct obd_export *exp)
435 return !!(exp_connect_flags(exp) & OBD_CONNECT_LARGE_ACL);
438 static inline int exp_connect_lockahead_old(struct obd_export *exp)
440 return !!(exp_connect_flags(exp) & OBD_CONNECT_LOCKAHEAD_OLD);
443 static inline int exp_connect_lockahead(struct obd_export *exp)
445 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_LOCKAHEAD);
448 static inline int exp_connect_flr(struct obd_export *exp)
450 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_FLR);
453 static inline int exp_connect_lock_convert(struct obd_export *exp)
455 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_LOCK_CONVERT);
458 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
460 static inline int exp_connect_archive_id_array(struct obd_export *exp)
462 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_ARCHIVE_ID_ARRAY);
466 /* archive_ids in array format */
467 KKUC_CT_DATA_ARRAY_MAGIC = 0x092013cea,
468 /* archive_ids in bitmap format */
469 KKUC_CT_DATA_BITMAP_MAGIC = 0x082018cea,
473 struct kkuc_ct_data {
475 __u32 kcd_nr_archives;
476 __u32 kcd_archives[0];
481 #endif /* __EXPORT_H */