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/rhashtable.h>
46 #include <linux/workqueue.h>
48 #include <lprocfs_status.h>
49 #include <uapi/linux/lustre/lustre_idl.h>
50 #include <lustre_dlm.h>
52 struct mds_client_data;
53 struct mdt_client_data;
54 struct mds_idmap_table;
55 struct mdt_idmap_table;
58 * Target-specific export data
60 struct tg_export_data {
61 /** Protects ted_lcd, ted_reply_* and
62 * ted_release_* fields below */
63 struct mutex 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 */
72 * ted_nodemap_lock is used to ensure that the nodemap is not destroyed
73 * between the time that ted_nodemap is checked for NULL, and a
74 * reference is taken. Modifications to ted_nodemap require that the
75 * active_config_lock and the nodemap(s)'s nm_member_list_lock be
76 * taken, as well as ted_nodemap_lock, so the export can be properly
77 * added to or removed from the nodemap's member list. When an export
78 * is added to a nodemap, a reference on that nodemap must be taken.
79 * That reference can be put only after ted_nodemap no longer refers to
82 spinlock_t ted_nodemap_lock;
83 struct lu_nodemap *ted_nodemap;
84 struct list_head ted_nodemap_member;
86 /** last version of nodemap config sent to client */
87 __u64 ted_nodemap_version;
89 /* Every reply data fields below are
90 * protected by ted_lcd_lock */
91 /** List of reply data */
92 struct list_head ted_reply_list;
94 /** Reply data with highest transno is retained */
95 struct tg_reply_data *ted_reply_last;
97 int ted_reply_max; /* high water mark */
101 long ted_dirty; /* in bytes */
102 long ted_grant; /* in bytes */
103 long ted_pending; /* bytes just being written */
104 __u8 ted_pagebits; /* log2 of client page size */
107 * File Modification Data (FMD) tracking
109 spinlock_t ted_fmd_lock; /* protects ted_fmd_list */
110 struct list_head ted_fmd_list; /* FIDs being modified */
111 int ted_fmd_count;/* items in ted_fmd_list */
115 * MDT-specific export data
117 struct mdt_export_data {
118 struct tg_export_data med_ted;
119 /** List of all files opened by client on this MDT */
120 struct list_head med_open_head;
121 spinlock_t med_open_lock; /* med_open_head, mfd_list */
124 struct ec_export_data { /* echo client */
125 struct list_head eced_locks;
128 /* In-memory access to client data from OST struct */
129 /** Filter (oss-side) specific import data */
130 struct filter_export_data {
131 struct tg_export_data fed_ted;
132 __u64 fed_lastid_gen;
133 /* count of SOFT_SYNC RPCs, which will be reset after
134 * ofd_soft_sync_limit number of RPCs, and trigger a sync. */
135 atomic_t fed_soft_sync_count;
139 struct mgs_export_data {
140 struct list_head med_clients; /* mgc fs client via this exp */
141 spinlock_t med_lock; /* protect med_clients */
145 * per-NID statistics structure.
146 * It tracks access patterns to this export on a per-client-NID basis
150 struct hlist_node nid_hash;
151 struct list_head nid_list;
152 struct obd_device *nid_obd;
153 struct proc_dir_entry *nid_proc;
154 struct lprocfs_stats *nid_stats;
155 struct lprocfs_stats *nid_ldlm_stats;
156 atomic_t nid_exp_ref_count; /* for obd_nid_stats_hash
160 #define nidstat_getref(nidstat) \
162 atomic_inc(&(nidstat)->nid_exp_ref_count); \
165 #define nidstat_putref(nidstat) \
167 atomic_dec(&(nidstat)->nid_exp_ref_count); \
168 LASSERTF(atomic_read(&(nidstat)->nid_exp_ref_count) >= 0, \
169 "stat %p nid_exp_ref_count < 0\n", nidstat); \
173 OBD_OPT_FORCE = 0x0001,
174 OBD_OPT_FAILOVER = 0x0002,
175 OBD_OPT_ABORT_RECOV = 0x0004,
179 * Export structure. Represents target-side of connection in portals.
180 * Also used in Lustre to connect between layers on the same node when
181 * there is no network-connection in-between.
182 * For every connected client there is an export structure on the server
183 * attached to the same obd device.
187 * Export handle, it's id is provided to client on connect
188 * Subsequent client RPCs contain this handle id to identify
189 * what export they are talking to.
191 struct portals_handle exp_handle;
193 * Set of counters below is to track where export references are
194 * kept. The exp_rpc_count is used for reconnect handling also,
195 * the cb_count and locks_count are for debug purposes only for now.
196 * The sum of them should be less than exp_handle.href by 3
198 atomic_t exp_rpc_count; /* RPC references */
199 atomic_t exp_cb_count; /* Commit callback references */
200 /** Number of queued replay requests to be processes */
201 atomic_t exp_replay_count;
202 atomic_t exp_locks_count; /** Lock references */
203 #if LUSTRE_TRACKS_LOCK_EXP_REFS
204 struct list_head exp_locks_list;
205 spinlock_t exp_locks_list_guard;
207 /** UUID of client connected to this export */
208 struct obd_uuid exp_client_uuid;
209 /** To link all exports on an obd device */
210 struct list_head exp_obd_chain;
211 /** work_struct for destruction of export */
212 struct work_struct exp_zombie_work;
213 /* Unlinked export list */
214 struct list_head exp_stale_list;
215 struct rhash_head exp_uuid_hash; /** uuid-export hash */
216 struct rhlist_head exp_nid_hash; /** nid-export hash */
217 struct hlist_node exp_gen_hash; /** last_rcvd clt gen hash */
219 * All exports eligible for ping evictor are linked into a list
220 * through this field in "most time since last request on this export"
222 * protected by obd_dev_lock
224 struct list_head exp_obd_chain_timed;
225 /** Obd device of this export */
226 struct obd_device *exp_obd;
228 * "reverse" import to send requests (e.g. from ldlm) back to client
229 * exp_lock protect its change
231 struct obd_import *exp_imp_reverse;
232 struct nid_stat *exp_nid_stats;
233 /** Active connetion */
234 struct ptlrpc_connection *exp_connection;
235 /** Connection count value from last successful reconnect rpc */
237 /** Hash list of all ldlm locks granted on this export */
238 struct cfs_hash *exp_lock_hash;
240 * Hash list for Posix lock deadlock detection, added with
241 * ldlm_lock::l_exp_flock_hash.
243 struct cfs_hash *exp_flock_hash;
244 struct list_head exp_outstanding_replies;
245 struct list_head exp_uncommitted_replies;
246 spinlock_t exp_uncommitted_replies_lock;
247 /** Last committed transno for this export */
248 __u64 exp_last_committed;
249 /** When was last request received */
250 time64_t exp_last_request_time;
251 /** On replay all requests waiting for replay are linked here */
252 struct list_head exp_req_replay_queue;
254 * protects exp_flags, exp_outstanding_replies and the change
258 /** Compatibility flags for this export are embedded into
259 * exp_connect_data */
260 struct obd_connect_data exp_connect_data;
261 enum obd_option exp_flags;
262 unsigned long exp_failed:1,
266 /** VBR: export missed recovery */
268 /** VBR: failed version checking */
270 exp_req_replay_needed:1,
271 exp_lock_replay_needed:1,
275 /* if to swap nidtbl entries for 2.2 clients.
276 * Only used by the MGS to fix LU-1644. */
278 /* The export already got final replay ping
281 /* local client with recovery disabled */
284 /* also protected by exp_lock */
285 enum lustre_sec_part exp_sp_peer;
286 struct sptlrpc_flavor exp_flvr; /* current */
287 struct sptlrpc_flavor exp_flvr_old[2]; /* about-to-expire */
288 time64_t exp_flvr_expire[2]; /* seconds */
290 /** protects exp_hp_rpcs */
291 spinlock_t exp_rpc_lock;
292 struct list_head exp_hp_rpcs; /* (potential) HP RPCs */
293 struct list_head exp_reg_rpcs; /* RPC being handled */
295 /** blocking dlm lock list, protected by exp_bl_list_lock */
296 struct list_head exp_bl_list;
297 spinlock_t exp_bl_list_lock;
299 /** Target specific data */
301 struct tg_export_data eu_target_data;
302 struct mdt_export_data eu_mdt_data;
303 struct filter_export_data eu_filter_data;
304 struct ec_export_data eu_ec_data;
305 struct mgs_export_data eu_mgs_data;
308 struct adaptive_timeout exp_bl_lock_at;
310 /** highest XID received by export client that has no
311 * unreceived lower-numbered XID
314 long *exp_used_slots;
317 #define exp_target_data u.eu_target_data
318 #define exp_mdt_data u.eu_mdt_data
319 #define exp_filter_data u.eu_filter_data
320 #define exp_ec_data u.eu_ec_data
322 static inline __u64 *exp_connect_flags_ptr(struct obd_export *exp)
324 return &exp->exp_connect_data.ocd_connect_flags;
327 static inline __u64 exp_connect_flags(struct obd_export *exp)
329 return *exp_connect_flags_ptr(exp);
332 static inline __u64 *exp_connect_flags2_ptr(struct obd_export *exp)
334 return &exp->exp_connect_data.ocd_connect_flags2;
337 static inline __u64 exp_connect_flags2(struct obd_export *exp)
339 if (exp_connect_flags(exp) & OBD_CONNECT_FLAGS2)
340 return *exp_connect_flags2_ptr(exp);
344 static inline int exp_max_brw_size(struct obd_export *exp)
346 LASSERT(exp != NULL);
347 if (exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE)
348 return exp->exp_connect_data.ocd_brw_size;
350 return ONE_MB_BRW_SIZE;
353 static inline int exp_connect_multibulk(struct obd_export *exp)
355 return exp_max_brw_size(exp) > ONE_MB_BRW_SIZE;
358 static inline int exp_connect_cancelset(struct obd_export *exp)
360 LASSERT(exp != NULL);
361 return !!(exp_connect_flags(exp) & OBD_CONNECT_CANCELSET);
364 static inline int exp_connect_lru_resize(struct obd_export *exp)
366 LASSERT(exp != NULL);
367 return !!(exp_connect_flags(exp) & OBD_CONNECT_LRU_RESIZE);
370 static inline int exp_connect_vbr(struct obd_export *exp)
372 LASSERT(exp != NULL);
373 LASSERT(exp->exp_connection);
374 return !!(exp_connect_flags(exp) & OBD_CONNECT_VBR);
377 static inline int exp_connect_umask(struct obd_export *exp)
379 return !!(exp_connect_flags(exp) & OBD_CONNECT_UMASK);
382 static inline int imp_connect_lru_resize(struct obd_import *imp)
384 struct obd_connect_data *ocd;
386 LASSERT(imp != NULL);
387 ocd = &imp->imp_connect_data;
388 return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
391 static inline int exp_connect_layout(struct obd_export *exp)
393 return !!(exp_connect_flags(exp) & OBD_CONNECT_LAYOUTLOCK);
396 static inline bool exp_connect_lvb_type(struct obd_export *exp)
398 LASSERT(exp != NULL);
399 if (exp_connect_flags(exp) & OBD_CONNECT_LVB_TYPE)
405 static inline bool imp_connect_lvb_type(struct obd_import *imp)
407 struct obd_connect_data *ocd;
409 LASSERT(imp != NULL);
410 ocd = &imp->imp_connect_data;
411 if (ocd->ocd_connect_flags & OBD_CONNECT_LVB_TYPE)
417 static inline bool imp_connect_disp_stripe(struct obd_import *imp)
419 struct obd_connect_data *ocd;
421 LASSERT(imp != NULL);
422 ocd = &imp->imp_connect_data;
423 return ocd->ocd_connect_flags & OBD_CONNECT_DISP_STRIPE;
426 static inline bool imp_connect_shortio(struct obd_import *imp)
428 struct obd_connect_data *ocd = &imp->imp_connect_data;
430 return ocd->ocd_connect_flags & OBD_CONNECT_SHORTIO;
433 static inline __u64 exp_connect_ibits(struct obd_export *exp)
435 struct obd_connect_data *ocd;
437 ocd = &exp->exp_connect_data;
438 return ocd->ocd_ibits_known;
441 static inline int exp_connect_large_acl(struct obd_export *exp)
443 return !!(exp_connect_flags(exp) & OBD_CONNECT_LARGE_ACL);
446 static inline int exp_connect_lockahead(struct obd_export *exp)
448 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_LOCKAHEAD);
451 static inline int exp_connect_overstriping(struct obd_export *exp)
453 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_OVERSTRIPING);
456 static inline int exp_connect_flr(struct obd_export *exp)
458 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_FLR);
461 static inline int exp_connect_lock_convert(struct obd_export *exp)
463 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_LOCK_CONVERT);
466 extern struct obd_export *class_conn2export(struct lustre_handle *conn);
468 static inline int exp_connect_archive_id_array(struct obd_export *exp)
470 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_ARCHIVE_ID_ARRAY);
473 static inline int exp_connect_sepol(struct obd_export *exp)
475 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_SELINUX_POLICY);
478 static inline int exp_connect_encrypt(struct obd_export *exp)
480 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_ENCRYPT);
483 static inline int exp_connect_lseek(struct obd_export *exp)
485 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_LSEEK);
488 static inline int exp_connect_dom_lvb(struct obd_export *exp)
490 return !!(exp_connect_flags2(exp) & OBD_CONNECT2_DOM_LVB);
494 /* archive_ids in array format */
495 KKUC_CT_DATA_ARRAY_MAGIC = 0x092013cea,
496 /* archive_ids in bitmap format */
497 KKUC_CT_DATA_BITMAP_MAGIC = 0x082018cea,
501 struct kkuc_ct_data {
503 __u32 kcd_nr_archives;
504 __u32 kcd_archives[0];
509 #endif /* __EXPORT_H */