1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #if defined(__linux__)
27 #include <linux/lustre_net.h>
28 #elif defined(__APPLE__)
29 #include <darwin/lustre_net.h>
30 #elif defined(__WINNT__)
31 #include <winnt/lustre_net.h>
33 #error Unsupported operating system.
36 #include <libcfs/kp30.h>
38 #include <lnet/lnet.h>
39 #include <lustre/lustre_idl.h>
40 #include <lustre_ha.h>
41 #include <lustre_sec.h>
42 #include <lustre_import.h>
43 #include <lprocfs_status.h>
44 #include <lu_object.h>
46 /* MD flags we _always_ use */
47 #define PTLRPC_MD_OPTIONS 0
49 /* Define maxima for bulk I/O
50 * CAVEAT EMPTOR, with multinet (i.e. routers forwarding between networks)
51 * these limits are system wide and not interface-local. */
52 #define PTLRPC_MAX_BRW_BITS LNET_MTU_BITS
53 #define PTLRPC_MAX_BRW_SIZE (1<<LNET_MTU_BITS)
54 #define PTLRPC_MAX_BRW_PAGES (PTLRPC_MAX_BRW_SIZE >> CFS_PAGE_SHIFT)
56 /* When PAGE_SIZE is a constant, we can check our arithmetic here with cpp! */
58 # if ((PTLRPC_MAX_BRW_PAGES & (PTLRPC_MAX_BRW_PAGES - 1)) != 0)
59 # error "PTLRPC_MAX_BRW_PAGES isn't a power of two"
61 # if (PTLRPC_MAX_BRW_SIZE != (PTLRPC_MAX_BRW_PAGES * CFS_PAGE_SIZE))
62 # error "PTLRPC_MAX_BRW_SIZE isn't PTLRPC_MAX_BRW_PAGES * CFS_PAGE_SIZE"
64 # if (PTLRPC_MAX_BRW_SIZE > LNET_MTU)
65 # error "PTLRPC_MAX_BRW_SIZE too big"
67 # if (PTLRPC_MAX_BRW_PAGES > LNET_MAX_IOV)
68 # error "PTLRPC_MAX_BRW_PAGES too big"
70 #endif /* __KERNEL__ */
72 /* Size over which to OBD_VMALLOC() rather than OBD_ALLOC() service request
74 #define SVC_BUF_VMALLOC_THRESHOLD (2 * CFS_PAGE_SIZE)
76 /* The following constants determine how memory is used to buffer incoming
79 * ?_NBUFS # buffers to allocate when growing the pool
80 * ?_BUFSIZE # bytes in a single request buffer
81 * ?_MAXREQSIZE # maximum request service will receive
83 * When fewer than ?_NBUFS/2 buffers are posted for receive, another chunk
84 * of ?_NBUFS is added to the pool.
86 * Messages larger than ?_MAXREQSIZE are dropped. Request buffers are
87 * considered full when less than ?_MAXREQSIZE is left in them.
90 #define LDLM_THREADS_AUTO_MIN min((int)(smp_num_cpus * smp_num_cpus * 2), 8)
91 #define LDLM_THREADS_AUTO_MAX (LDLM_THREADS_AUTO_MIN * 16)
92 #define LDLM_BL_THREADS LDLM_THREADS_AUTO_MIN
93 #define LDLM_NBUFS (64 * smp_num_cpus)
94 #define LDLM_BUFSIZE (8 * 1024)
95 #define LDLM_MAXREQSIZE (5 * 1024)
96 #define LDLM_MAXREPSIZE (1024)
98 #define MDT_MIN_THREADS 2UL
99 #define MDT_MAX_THREADS 512UL
100 #define MDT_NUM_THREADS max(min_t(unsigned long, MDT_MAX_THREADS, \
101 num_physpages >> (25 - PAGE_SHIFT)), 2UL)
102 #define FLD_NUM_THREADS max(min_t(unsigned long, MDT_MAX_THREADS, \
103 num_physpages >> (25 - PAGE_SHIFT)), 2UL)
104 #define SEQ_NUM_THREADS max(min_t(unsigned long, MDT_MAX_THREADS, \
105 num_physpages >> (25 - PAGE_SHIFT)), 2UL)
107 /* Absolute limits */
108 #define MDS_THREADS_MIN 2
109 #define MDS_THREADS_MAX 512
110 #define MDS_THREADS_MIN_READPAGE 2
111 #define MDS_NBUFS (64 * smp_num_cpus)
112 #define MDS_BUFSIZE (8 * 1024)
113 /* Assume file name length = FNAME_MAX = 256 (true for ext3).
114 * path name length = PATH_MAX = 4096
115 * LOV MD size max = EA_MAX = 4000
116 * symlink: FNAME_MAX + PATH_MAX <- largest
117 * link: FNAME_MAX + PATH_MAX (mds_rec_link < mds_rec_create)
118 * rename: FNAME_MAX + FNAME_MAX
119 * open: FNAME_MAX + EA_MAX
121 * MDS_MAXREQSIZE ~= 4736 bytes =
122 * lustre_msg + ldlm_request + mds_body + mds_rec_create + FNAME_MAX + PATH_MAX
123 * MDS_MAXREPSIZE ~= 8300 bytes = lustre_msg + llog_header
124 * or, for mds_close() and mds_reint_unlink() on a many-OST filesystem:
125 * = 9210 bytes = lustre_msg + mds_body + 160 * (easize + cookiesize)
127 * Realistic size is about 512 bytes (20 character name + 128 char symlink),
128 * except in the open case where there are a large number of OSTs in a LOV.
130 #define MDS_MAXREQSIZE (5 * 1024)
131 #define MDS_MAXREPSIZE max(9 * 1024, 280 + LOV_MAX_STRIPE_COUNT * 56)
133 /* FLD_MAXREQSIZE == lustre_msg + __u32 padding + ptlrpc_body + opc + md_fld */
134 #define FLD_MAXREQSIZE (160)
136 /* FLD_MAXREPSIZE == lustre_msg + ptlrpc_body + md_fld */
137 #define FLD_MAXREPSIZE (152)
139 /* SEQ_MAXREQSIZE == lustre_msg + __u32 padding + ptlrpc_body + opc + lu_range +
141 #define SEQ_MAXREQSIZE (160)
143 /* SEQ_MAXREPSIZE == lustre_msg + ptlrpc_body + lu_range */
144 #define SEQ_MAXREPSIZE (152)
146 #define MGS_THREADS_AUTO_MIN 2
147 #define MGS_THREADS_AUTO_MAX 32
148 #define MGS_NBUFS (64 * smp_num_cpus)
149 #define MGS_BUFSIZE (8 * 1024)
150 #define MGS_MAXREQSIZE (7 * 1024)
151 #define MGS_MAXREPSIZE (9 * 1024)
153 /* Absolute limits */
154 #define OSS_THREADS_MIN 2
155 #define OSS_THREADS_MAX 512
156 #define OST_NBUFS (64 * smp_num_cpus)
157 #define OST_BUFSIZE (8 * 1024)
158 /* OST_MAXREQSIZE ~= 4768 bytes =
159 * lustre_msg + obdo + 16 * obd_ioobj + 256 * niobuf_remote
161 * - single object with 16 pages is 512 bytes
162 * - OST_MAXREQSIZE must be at least 1 page of cookies plus some spillover
164 #define OST_MAXREQSIZE (5 * 1024)
165 #define OST_MAXREPSIZE (9 * 1024)
167 struct ptlrpc_connection {
168 struct list_head c_link;
170 lnet_process_id_t c_peer;
171 struct obd_uuid c_remote_uuid;
175 struct ptlrpc_client {
176 __u32 cli_request_portal;
177 __u32 cli_reply_portal;
181 /* state flags of requests */
182 /* XXX only ones left are those used by the bulk descs as well! */
183 #define PTL_RPC_FL_INTR (1 << 0) /* reply wait was interrupted by user */
184 #define PTL_RPC_FL_TIMEOUT (1 << 7) /* request timed out waiting for reply */
186 #define REQ_MAX_ACK_LOCKS 8
188 union ptlrpc_async_args {
189 /* Scratchpad for passing args to completion interpreter. Users
190 * cast to the struct of their choosing, and LASSERT that this is
191 * big enough. For _tons_ of context, OBD_ALLOC a struct and store
192 * a pointer to it here. The pointer_arg ensures this struct is at
193 * least big enough for that. */
194 void *pointer_arg[9];
198 struct ptlrpc_request_set;
199 typedef int (*set_interpreter_func)(struct ptlrpc_request_set *, void *, int);
201 struct ptlrpc_request_set {
202 int set_remaining; /* # uncompleted requests */
203 cfs_waitq_t set_waitq;
204 cfs_waitq_t *set_wakeup_ptr;
205 struct list_head set_requests;
206 set_interpreter_func set_interpret; /* completion callback */
207 void *set_arg; /* completion context */
208 void *set_countp; /* pointer to NOB counter in case
209 * of directIO (bug11737) */
210 /* locked so that any old caller can communicate requests to
211 * the set holder who can then fold them into the lock-free set */
212 spinlock_t set_new_req_lock;
213 struct list_head set_new_requests;
216 struct ptlrpc_bulk_desc;
219 * ptlrpc callback & work item stuff
221 struct ptlrpc_cb_id {
222 void (*cbid_fn)(lnet_event_t *ev); /* specific callback fn */
223 void *cbid_arg; /* additional arg */
226 #define RS_MAX_LOCKS 4
229 struct ptlrpc_reply_state {
230 struct ptlrpc_cb_id rs_cb_id;
231 struct list_head rs_list;
232 struct list_head rs_exp_list;
233 struct list_head rs_obd_list;
235 struct list_head rs_debug_list;
237 /* updates to following flag serialised by srv_request_lock */
238 unsigned int rs_difficult:1; /* ACK/commit stuff */
239 unsigned int rs_scheduled:1; /* being handled? */
240 unsigned int rs_scheduled_ever:1;/* any schedule attempts? */
241 unsigned int rs_handled:1; /* been handled yet? */
242 unsigned int rs_on_net:1; /* reply_out_callback pending? */
243 unsigned int rs_prealloc:1; /* rs from prealloc list */
248 struct obd_export *rs_export;
249 struct ptlrpc_service *rs_service;
250 lnet_handle_md_t rs_md_h;
251 atomic_t rs_refcount;
253 struct ptlrpc_svc_ctx *rs_svc_ctx;
254 struct lustre_msg *rs_repbuf; /* wrapper */
255 int rs_repbuf_len; /* wrapper buf length */
256 int rs_repdata_len; /* wrapper msg length */
257 struct lustre_msg *rs_msg; /* reply message */
259 /* locks awaiting client reply ACK */
261 struct lustre_handle rs_locks[RS_MAX_LOCKS];
262 ldlm_mode_t rs_modes[RS_MAX_LOCKS];
265 struct ptlrpc_thread;
268 RQ_PHASE_NEW = 0xebc0de00,
269 RQ_PHASE_RPC = 0xebc0de01,
270 RQ_PHASE_BULK = 0xebc0de02,
271 RQ_PHASE_INTERPRET = 0xebc0de03,
272 RQ_PHASE_COMPLETE = 0xebc0de04,
275 struct ptlrpc_request_pool {
277 struct list_head prp_req_list; /* list of ptlrpc_request structs */
279 void (*prp_populate)(struct ptlrpc_request_pool *, int);
285 struct ptlrpc_request {
286 int rq_type; /* one of PTL_RPC_MSG_* */
287 struct list_head rq_list;
288 struct list_head rq_history_list; /* server-side history */
289 __u64 rq_history_seq; /* history sequence # */
292 /* client-side flags */
293 unsigned int rq_intr:1, rq_replied:1, rq_err:1,
294 rq_timedout:1, rq_resend:1, rq_restart:1,
296 * when ->rq_replay is set, request is kept by the client even
297 * after server commits corresponding transaction. This is
298 * used for operations that require sequence of multiple
299 * requests to be replayed. The only example currently is file
300 * open/close/dw/setattr. When last request in such a sequence
301 * is committed, ->rq_replay is cleared on all requests in the
305 /* this is the last request in the sequence. */
307 rq_no_resend:1, rq_waiting:1, rq_receiving_reply:1,
308 rq_no_delay:1, rq_net_err:1, rq_wait_ctx:1;
309 enum rq_phase rq_phase; /* one of RQ_PHASE_* */
310 atomic_t rq_refcount; /* client-side refcount for SENT race */
312 struct ptlrpc_thread *rq_svc_thread; /* initial thread servicing req */
314 int rq_request_portal; /* XXX FIXME bug 249 */
315 int rq_reply_portal; /* XXX FIXME bug 249 */
317 int rq_nob_received; /* client-side # reply bytes actually received */
320 struct lustre_msg *rq_reqmsg;
322 int rq_timeout; /* time to wait for reply (seconds) */
324 struct lustre_msg *rq_repmsg;
327 struct list_head rq_replay_list;
328 struct list_head rq_mod_list;
330 struct ptlrpc_cli_ctx *rq_cli_ctx; /* client's half ctx */
331 struct ptlrpc_svc_ctx *rq_svc_ctx; /* server's half ctx */
332 struct list_head rq_ctx_chain; /* link to waited ctx */
333 ptlrpc_sec_flavor_t rq_sec_flavor; /* client & server */
334 /* client security flags */
335 unsigned int rq_ctx_init:1, /* context initiation */
336 rq_ctx_fini:1, /* context destroy */
337 rq_bulk_read:1, /* request bulk read */
338 rq_bulk_write:1, /* request bulk write */
339 /* server authentication flags */
340 rq_auth_gss:1, /* authenticated by gss */
341 rq_auth_remote:1, /* authed as remote user */
342 rq_auth_usr_root:1, /* authed as root */
343 rq_auth_usr_mdt:1; /* authed as mdt */
345 uid_t rq_auth_uid; /* authed uid */
346 uid_t rq_auth_mapped_uid; /* authed uid mapped to */
348 /* (server side), pointed directly into req buffer */
349 struct ptlrpc_user_desc *rq_user_desc;
351 /* various buffer pointers */
352 struct lustre_msg *rq_reqbuf; /* req wrapper */
353 int rq_reqbuf_len; /* req wrapper buf len */
354 int rq_reqdata_len; /* req wrapper msg len */
355 struct lustre_msg *rq_repbuf; /* rep wrapper */
356 int rq_repbuf_len; /* rep wrapper buf len */
357 int rq_repdata_len; /* rep wrapper msg len */
358 struct lustre_msg *rq_clrbuf; /* only in priv mode */
359 int rq_clrbuf_len; /* only in priv mode */
360 int rq_clrdata_len; /* only in priv mode */
362 __u32 rq_req_swab_mask;
363 __u32 rq_rep_swab_mask;
365 int rq_import_generation;
366 enum lustre_imp_state rq_send_state;
368 /* client+server request */
369 lnet_handle_md_t rq_req_md_h;
370 struct ptlrpc_cb_id rq_req_cbid;
373 struct timeval rq_arrival_time; /* request arrival time */
374 struct ptlrpc_reply_state *rq_reply_state; /* separated reply state */
375 struct ptlrpc_request_buffer_desc *rq_rqbd; /* incoming request buffer*/
377 __u32 rq_uid; /* peer uid, used in MDS only */
380 /* client-only incoming reply */
381 lnet_handle_md_t rq_reply_md_h;
382 cfs_waitq_t rq_reply_waitq;
383 struct ptlrpc_cb_id rq_reply_cbid;
386 lnet_process_id_t rq_peer;
387 struct obd_export *rq_export;
388 struct obd_import *rq_import;
390 void (*rq_replay_cb)(struct ptlrpc_request *);
391 void (*rq_commit_cb)(struct ptlrpc_request *);
394 struct ptlrpc_bulk_desc *rq_bulk; /* client side bulk */
395 time_t rq_sent; /* when request sent, seconds */
398 struct list_head rq_set_chain;
399 struct ptlrpc_request_set *rq_set;
400 void *rq_interpret_reply; /* Async completion handler */
401 union ptlrpc_async_args rq_async_args; /* Async completion context */
402 void *rq_ptlrpcd_data;
403 struct ptlrpc_request_pool *rq_pool; /* Pool if request from
405 struct lu_context rq_session;
408 static inline void ptlrpc_close_replay_seq(struct ptlrpc_request *req)
410 spin_lock(&req->rq_lock);
412 req->rq_sequence = 1;
413 spin_unlock(&req->rq_lock);
416 static inline void lustre_set_req_swabbed(struct ptlrpc_request *req, int index)
418 LASSERT(index < sizeof(req->rq_req_swab_mask) * 8);
419 LASSERT((req->rq_req_swab_mask & (1 << index)) == 0);
420 req->rq_req_swab_mask |= 1 << index;
423 static inline void lustre_set_rep_swabbed(struct ptlrpc_request *req, int index)
425 LASSERT(index < sizeof(req->rq_rep_swab_mask) * 8);
426 LASSERT((req->rq_rep_swab_mask & (1 << index)) == 0);
427 req->rq_rep_swab_mask |= 1 << index;
430 static inline int lustre_req_swabbed(struct ptlrpc_request *req, int index)
432 LASSERT(index < sizeof(req->rq_req_swab_mask) * 8);
433 return req->rq_req_swab_mask & (1 << index);
436 static inline int lustre_rep_swabbed(struct ptlrpc_request *req, int index)
438 LASSERT(index < sizeof(req->rq_rep_swab_mask) * 8);
439 return req->rq_rep_swab_mask & (1 << index);
442 #define SWAB_PARANOIA 1
445 /* unpacking: assert idx not unpacked already */
446 #define LASSERT_REQSWAB(rq, idx) lustre_set_req_swabbed(rq, idx)
447 #define LASSERT_REPSWAB(rq, idx) lustre_set_rep_swabbed(rq, idx)
449 /* just looking: assert idx already unpacked */
450 #define LASSERT_REQSWABBED(rq, idx) LASSERT(lustre_req_swabbed(rq, idx))
451 #define LASSERT_REPSWABBED(rq, idx) LASSERT(lustre_rep_swabbed(rq, idx))
454 #define LASSERT_REQSWAB(rq, idx)
455 #define LASSERT_REPSWAB(rq, idx)
456 #define LASSERT_REQSWABBED(rq, idx)
457 #define LASSERT_REPSWABBED(rq, idx)
460 static inline const char *
461 ptlrpc_rqphase2str(const struct ptlrpc_request *req)
463 switch (req->rq_phase) {
470 case RQ_PHASE_INTERPRET:
472 case RQ_PHASE_COMPLETE:
479 /* Spare the preprocessor, spoil the bugs. */
480 #define FLAG(field, str) (field ? str : "")
482 #define DEBUG_REQ_FLAGS(req) \
483 ptlrpc_rqphase2str(req), \
484 FLAG(req->rq_intr, "I"), FLAG(req->rq_replied, "R"), \
485 FLAG(req->rq_err, "E"), \
486 FLAG(req->rq_timedout, "X") /* eXpired */, FLAG(req->rq_resend, "S"), \
487 FLAG(req->rq_restart, "T"), FLAG(req->rq_replay, "P"), \
488 FLAG(req->rq_no_resend, "N"), \
489 FLAG(req->rq_waiting, "W"), \
490 FLAG(req->rq_wait_ctx, "C")
492 #define REQ_FLAGS_FMT "%s:%s%s%s%s%s%s%s%s%s%s"
494 void _debug_req(struct ptlrpc_request *req, __u32 mask,
495 struct libcfs_debug_msg_data *data, const char *fmt, ...)
496 __attribute__ ((format (printf, 4, 5)));
498 #define debug_req(cdls, level, req, file, func, line, fmt, a...) \
502 if (((level) & D_CANTMASK) != 0 || \
503 ((libcfs_debug & (level)) != 0 && \
504 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) { \
505 static struct libcfs_debug_msg_data _req_dbg_data = \
506 DEBUG_MSG_DATA_INIT(cdls, DEBUG_SUBSYSTEM, file, func, line); \
507 _debug_req((req), (level), &_req_dbg_data, fmt, ##a); \
511 /* for most callers (level is a constant) this is resolved at compile time */
512 #define DEBUG_REQ(level, req, fmt, args...) \
514 if ((level) & (D_ERROR | D_WARNING)) { \
515 static cfs_debug_limit_state_t cdls; \
516 debug_req(&cdls, level, req, __FILE__, __func__, __LINE__, \
517 "@@@ "fmt" ", ## args); \
519 debug_req(NULL, level, req, __FILE__, __func__, __LINE__, \
520 "@@@ "fmt" ", ## args); \
523 struct ptlrpc_bulk_page {
524 struct list_head bp_link;
526 int bp_pageoffset; /* offset within a page */
527 struct page *bp_page;
530 #define BULK_GET_SOURCE 0
531 #define BULK_PUT_SINK 1
532 #define BULK_GET_SINK 2
533 #define BULK_PUT_SOURCE 3
535 struct ptlrpc_bulk_desc {
536 unsigned int bd_success:1; /* completed successfully */
537 unsigned int bd_network_rw:1; /* accessible to the network */
538 unsigned int bd_type:2; /* {put,get}{source,sink} */
539 unsigned int bd_registered:1; /* client side */
540 spinlock_t bd_lock; /* serialise with callback */
541 int bd_import_generation;
542 struct obd_export *bd_export;
543 struct obd_import *bd_import;
545 struct ptlrpc_request *bd_req; /* associated request */
546 cfs_waitq_t bd_waitq; /* server side only WQ */
547 int bd_iov_count; /* # entries in bd_iov */
548 int bd_max_iov; /* allocated size of bd_iov */
549 int bd_nob; /* # bytes covered */
550 int bd_nob_transferred; /* # bytes GOT/PUT */
554 struct ptlrpc_cb_id bd_cbid; /* network callback info */
555 lnet_handle_md_t bd_md_h; /* associated MD */
556 lnet_nid_t bd_sender; /* stash event::sender */
558 cfs_page_t **bd_enc_pages;
559 #if defined(__KERNEL__)
560 lnet_kiov_t bd_iov[0];
562 lnet_md_iovec_t bd_iov[0];
566 struct ptlrpc_thread {
568 struct list_head t_link; /* active threads for service, from svc->srv_threads */
570 void *t_data; /* thread-private data (preallocated memory) */
573 unsigned int t_id; /* service thread index, from ptlrpc_start_threads */
574 cfs_waitq_t t_ctl_waitq;
575 struct lu_env *t_env;
578 struct ptlrpc_request_buffer_desc {
579 struct list_head rqbd_list;
580 struct list_head rqbd_reqs;
581 struct ptlrpc_service *rqbd_service;
582 lnet_handle_md_t rqbd_md_h;
585 struct ptlrpc_cb_id rqbd_cbid;
586 struct ptlrpc_request rqbd_req;
589 typedef int (*svc_handler_t)(struct ptlrpc_request *req);
590 typedef void (*svcreq_printfn_t)(void *, struct ptlrpc_request *);
592 struct ptlrpc_service {
593 struct list_head srv_list; /* chain thru all services */
594 int srv_max_req_size; /* biggest request to receive */
595 int srv_max_reply_size; /* biggest reply to send */
596 int srv_buf_size; /* size of individual buffers */
597 int srv_nbuf_per_group; /* # buffers to allocate in 1 group */
598 int srv_nbufs; /* total # req buffer descs allocated */
599 int srv_threads_min; /* threads to start at SOW */
600 int srv_threads_max; /* thread upper limit */
601 int srv_threads_started; /* index of last started thread */
602 int srv_threads_running; /* # running threads */
603 int srv_n_difficult_replies; /* # 'difficult' replies */
604 int srv_n_active_reqs; /* # reqs being served */
605 cfs_duration_t srv_rqbd_timeout; /* timeout before re-posting reqs, in tick */
606 int srv_watchdog_timeout; /* soft watchdog timeout, in ms */
607 unsigned srv_cpu_affinity:1; /* bind threads to CPUs */
609 __u32 srv_req_portal;
610 __u32 srv_rep_portal;
612 int srv_n_queued_reqs; /* # reqs waiting to be served */
613 struct list_head srv_request_queue; /* reqs waiting for service */
615 struct list_head srv_request_history; /* request history */
616 __u64 srv_request_seq; /* next request sequence # */
617 __u64 srv_request_max_cull_seq; /* highest seq culled from history */
618 svcreq_printfn_t srv_request_history_print_fn; /* service-specific print fn */
620 struct list_head srv_idle_rqbds; /* request buffers to be reposted */
621 struct list_head srv_active_rqbds; /* req buffers receiving */
622 struct list_head srv_history_rqbds; /* request buffer history */
623 int srv_nrqbd_receiving; /* # posted request buffers */
624 int srv_n_history_rqbds; /* # request buffers in history */
625 int srv_max_history_rqbds;/* max # request buffers in history */
627 atomic_t srv_outstanding_replies;
628 struct list_head srv_active_replies; /* all the active replies */
629 struct list_head srv_reply_queue; /* replies waiting for service */
631 cfs_waitq_t srv_waitq; /* all threads sleep on this. This
632 * wait-queue is signalled when new
633 * incoming request arrives and when
634 * difficult reply has to be handled. */
636 struct list_head srv_threads; /* service thread list */
637 svc_handler_t srv_handler;
639 char *srv_name; /* only statically allocated strings here; we don't clean them */
640 char *srv_thread_name; /* only statically allocated strings here; we don't clean them */
644 cfs_proc_dir_entry_t *srv_procroot;
645 struct lprocfs_stats *srv_stats;
647 /* List of free reply_states */
648 struct list_head srv_free_rs_list;
649 /* waitq to run, when adding stuff to srv_free_rs_list */
650 cfs_waitq_t srv_free_rs_waitq;
653 * Tags for lu_context associated with this thread, see struct
658 * if non-NULL called during thread creation (ptlrpc_start_thread())
659 * to initialize service specific per-thread state.
661 int (*srv_init)(struct ptlrpc_thread *thread);
663 * if non-NULL called during thread shutdown (ptlrpc_main()) to
664 * destruct state created by ->srv_init().
666 void (*srv_done)(struct ptlrpc_thread *thread);
668 //struct ptlrpc_srv_ni srv_interfaces[0];
671 /* ptlrpc/events.c */
672 extern lnet_handle_eq_t ptlrpc_eq_h;
673 extern int ptlrpc_uuid_to_peer(struct obd_uuid *uuid,
674 lnet_process_id_t *peer, lnet_nid_t *self);
675 extern void request_out_callback (lnet_event_t *ev);
676 extern void reply_in_callback(lnet_event_t *ev);
677 extern void client_bulk_callback (lnet_event_t *ev);
678 extern void request_in_callback(lnet_event_t *ev);
679 extern void reply_out_callback(lnet_event_t *ev);
680 extern void server_bulk_callback (lnet_event_t *ev);
682 /* ptlrpc/connection.c */
683 void ptlrpc_dump_connections(void);
684 void ptlrpc_readdress_connection(struct ptlrpc_connection *, struct obd_uuid *);
685 struct ptlrpc_connection *ptlrpc_get_connection(lnet_process_id_t peer,
686 lnet_nid_t self, struct obd_uuid *uuid);
687 int ptlrpc_put_connection(struct ptlrpc_connection *c);
688 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *);
689 void ptlrpc_init_connection(void);
690 void ptlrpc_cleanup_connection(void);
691 extern lnet_pid_t ptl_get_pid(void);
693 /* ptlrpc/niobuf.c */
694 int ptlrpc_start_bulk_transfer(struct ptlrpc_bulk_desc *desc);
695 void ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *desc);
696 int ptlrpc_register_bulk(struct ptlrpc_request *req);
697 void ptlrpc_unregister_bulk (struct ptlrpc_request *req);
699 static inline int ptlrpc_bulk_active (struct ptlrpc_bulk_desc *desc)
703 spin_lock(&desc->bd_lock);
704 rc = desc->bd_network_rw;
705 spin_unlock(&desc->bd_lock);
709 int ptlrpc_send_reply(struct ptlrpc_request *req, int);
710 int ptlrpc_reply(struct ptlrpc_request *req);
711 int ptlrpc_error(struct ptlrpc_request *req);
712 void ptlrpc_resend_req(struct ptlrpc_request *request);
713 int ptl_send_rpc(struct ptlrpc_request *request, int noreply);
714 int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd);
716 /* ptlrpc/client.c */
717 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
718 struct ptlrpc_client *);
719 void ptlrpc_cleanup_client(struct obd_import *imp);
720 struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid);
723 ptlrpc_client_receiving_reply (struct ptlrpc_request *req)
727 spin_lock(&req->rq_lock);
728 rc = req->rq_receiving_reply;
729 spin_unlock(&req->rq_lock);
734 ptlrpc_client_replied (struct ptlrpc_request *req)
738 spin_lock(&req->rq_lock);
739 rc = req->rq_replied;
740 spin_unlock(&req->rq_lock);
745 ptlrpc_wake_client_req (struct ptlrpc_request *req)
747 if (req->rq_set == NULL)
748 cfs_waitq_signal(&req->rq_reply_waitq);
750 cfs_waitq_signal(&req->rq_set->set_waitq);
753 int ptlrpc_queue_wait(struct ptlrpc_request *req);
754 int ptlrpc_replay_req(struct ptlrpc_request *req);
755 void ptlrpc_unregister_reply(struct ptlrpc_request *req);
756 void ptlrpc_restart_req(struct ptlrpc_request *req);
757 void ptlrpc_abort_inflight(struct obd_import *imp);
759 struct ptlrpc_request_set *ptlrpc_prep_set(void);
760 int ptlrpc_set_next_timeout(struct ptlrpc_request_set *);
761 int ptlrpc_check_set(struct ptlrpc_request_set *set);
762 int ptlrpc_set_wait(struct ptlrpc_request_set *);
763 int ptlrpc_expired_set(void *data);
764 void ptlrpc_interrupted_set(void *data);
765 void ptlrpc_mark_interrupted(struct ptlrpc_request *req);
766 void ptlrpc_set_destroy(struct ptlrpc_request_set *);
767 void ptlrpc_set_add_req(struct ptlrpc_request_set *, struct ptlrpc_request *);
768 void ptlrpc_set_add_new_req(struct ptlrpc_request_set *,
769 struct ptlrpc_request *);
771 void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool);
772 void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq);
773 struct ptlrpc_request_pool *ptlrpc_init_rq_pool(int, int,
774 void (*populate_pool)(struct ptlrpc_request_pool *, int));
775 struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, __u32 version,
776 int opcode, int count, int *lengths,
778 struct ptlrpc_request *ptlrpc_prep_req_pool(struct obd_import *imp,
779 __u32 version, int opcode,
780 int count, int *lengths, char **bufs,
781 struct ptlrpc_request_pool *pool,
782 struct ptlrpc_cli_ctx *ctx);
783 void ptlrpc_free_req(struct ptlrpc_request *request);
784 void ptlrpc_req_finished(struct ptlrpc_request *request);
785 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request);
786 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req);
787 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp (struct ptlrpc_request *req,
788 int npages, int type, int portal);
789 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp(struct ptlrpc_request *req,
790 int npages, int type, int portal);
791 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk);
792 void ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
793 cfs_page_t *page, int pageoffset, int len);
794 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
795 struct obd_import *imp);
796 __u64 ptlrpc_next_xid(void);
797 __u64 ptlrpc_sample_next_xid(void);
798 __u64 ptlrpc_req_xid(struct ptlrpc_request *request);
800 struct ptlrpc_service_conf {
803 int psc_max_req_size;
804 int psc_max_reply_size;
807 int psc_watchdog_timeout; /* in ms */
813 /* ptlrpc/service.c */
814 void ptlrpc_save_lock (struct ptlrpc_request *req,
815 struct lustre_handle *lock, int mode);
816 void ptlrpc_commit_replies (struct obd_device *obd);
817 void ptlrpc_schedule_difficult_reply (struct ptlrpc_reply_state *rs);
818 struct ptlrpc_service *ptlrpc_init_svc_conf(struct ptlrpc_service_conf *c,
819 svc_handler_t h, char *name,
820 struct proc_dir_entry *proc_entry,
821 svcreq_printfn_t prntfn,
824 struct ptlrpc_service *ptlrpc_init_svc(int nbufs, int bufsize, int max_req_size,
826 int req_portal, int rep_portal,
827 int watchdog_timeout, /* in ms */
828 svc_handler_t, char *name,
829 cfs_proc_dir_entry_t *proc_entry,
831 int min_threads, int max_threads,
832 char *threadname, __u32 ctx_tags);
833 void ptlrpc_stop_all_threads(struct ptlrpc_service *svc);
835 int ptlrpc_start_threads(struct obd_device *dev, struct ptlrpc_service *svc);
836 int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc);
837 int ptlrpc_unregister_service(struct ptlrpc_service *service);
838 int liblustre_check_services (void *arg);
839 void ptlrpc_daemonize(char *name);
840 int ptlrpc_service_health_check(struct ptlrpc_service *);
843 struct ptlrpc_svc_data {
845 struct ptlrpc_service *svc;
846 struct ptlrpc_thread *thread;
847 struct obd_device *dev;
850 /* ptlrpc/import.c */
851 int ptlrpc_connect_import(struct obd_import *imp, char * new_uuid);
852 int ptlrpc_init_import(struct obd_import *imp);
853 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose);
854 int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
856 /* ptlrpc/pack_generic.c */
857 int lustre_msg_swabbed(struct lustre_msg *msg);
858 int lustre_msg_check_version(struct lustre_msg *msg, __u32 version);
859 void lustre_init_msg_v2(struct lustre_msg_v2 *msg, int count, int *lens,
861 int lustre_pack_request(struct ptlrpc_request *, __u32 magic, int count,
862 int *lens, char **bufs);
863 int lustre_pack_reply(struct ptlrpc_request *, int count, int *lens,
865 int lustre_pack_reply_v2(struct ptlrpc_request *req, int count,
866 int *lens, char **bufs);
867 int lustre_shrink_msg(struct lustre_msg *msg, int segment,
868 unsigned int newlen, int move_data);
869 void lustre_free_reply_state(struct ptlrpc_reply_state *rs);
870 int lustre_msg_size(__u32 magic, int count, int *lengths);
871 int lustre_msg_size_v2(int count, int *lengths);
872 int lustre_unpack_msg(struct lustre_msg *m, int len);
873 void *lustre_msg_buf_v1(void *msg, int n, int min_size);
874 void *lustre_msg_buf_v2(struct lustre_msg_v2 *m, int n, int min_size);
875 void *lustre_msg_buf(struct lustre_msg *m, int n, int minlen);
876 int lustre_msg_buflen(struct lustre_msg *m, int n);
877 void lustre_msg_set_buflen(struct lustre_msg *m, int n, int len);
878 int lustre_msg_bufcount(struct lustre_msg *m);
879 char *lustre_msg_string (struct lustre_msg *m, int n, int max_len);
880 void *lustre_swab_buf(struct lustre_msg *, int n, int minlen, void *swabber);
881 void *lustre_swab_reqbuf(struct ptlrpc_request *req, int n, int minlen,
883 void *lustre_swab_repbuf(struct ptlrpc_request *req, int n, int minlen,
885 __u32 lustre_msg_get_flags(struct lustre_msg *msg);
886 void lustre_msg_add_flags(struct lustre_msg *msg, int flags);
887 void lustre_msg_set_flags(struct lustre_msg *msg, int flags);
888 void lustre_msg_clear_flags(struct lustre_msg *msg, int flags);
889 __u32 lustre_msg_get_op_flags(struct lustre_msg *msg);
890 void lustre_msg_add_op_flags(struct lustre_msg *msg, int flags);
891 void lustre_msg_set_op_flags(struct lustre_msg *msg, int flags);
892 struct lustre_handle *lustre_msg_get_handle(struct lustre_msg *msg);
893 __u32 lustre_msg_get_type(struct lustre_msg *msg);
894 __u32 lustre_msg_get_version(struct lustre_msg *msg);
895 void lustre_msg_add_version(struct lustre_msg *msg, int version);
896 __u32 lustre_msg_get_opc(struct lustre_msg *msg);
897 __u64 lustre_msg_get_last_xid(struct lustre_msg *msg);
898 __u64 lustre_msg_get_last_committed(struct lustre_msg *msg);
899 __u64 lustre_msg_get_transno(struct lustre_msg *msg);
900 int lustre_msg_get_status(struct lustre_msg *msg);
901 __u32 lustre_msg_get_conn_cnt(struct lustre_msg *msg);
902 __u32 lustre_msg_get_magic(struct lustre_msg *msg);
903 void lustre_msg_set_handle(struct lustre_msg *msg,struct lustre_handle *handle);
904 void lustre_msg_set_type(struct lustre_msg *msg, __u32 type);
905 void lustre_msg_set_opc(struct lustre_msg *msg, __u32 opc);
906 void lustre_msg_set_last_xid(struct lustre_msg *msg, __u64 last_xid);
907 void lustre_msg_set_last_committed(struct lustre_msg *msg,__u64 last_committed);
908 void lustre_msg_set_transno(struct lustre_msg *msg, __u64 transno);
909 void lustre_msg_set_status(struct lustre_msg *msg, __u32 status);
910 void lustre_msg_set_conn_cnt(struct lustre_msg *msg, __u32 conn_cnt);
913 lustre_shrink_reply(struct ptlrpc_request *req, int segment,
914 unsigned int newlen, int move_data)
916 LASSERT(req->rq_reply_state);
917 LASSERT(req->rq_repmsg);
918 req->rq_replen = lustre_shrink_msg(req->rq_repmsg, segment,
923 ptlrpc_rs_addref(struct ptlrpc_reply_state *rs)
925 LASSERT(atomic_read(&rs->rs_refcount) > 0);
926 atomic_inc(&rs->rs_refcount);
930 ptlrpc_rs_decref(struct ptlrpc_reply_state *rs)
932 LASSERT(atomic_read(&rs->rs_refcount) > 0);
933 if (atomic_dec_and_test(&rs->rs_refcount))
934 lustre_free_reply_state(rs);
937 static inline __u32 lustre_request_magic(struct ptlrpc_request *req)
939 return lustre_msg_get_magic(req->rq_reqmsg);
942 static inline int ptlrpc_req_get_repsize(struct ptlrpc_request *req)
944 switch (req->rq_reqmsg->lm_magic) {
945 case LUSTRE_MSG_MAGIC_V1:
946 CERROR("function not supported for lustre_msg V1!\n");
948 case LUSTRE_MSG_MAGIC_V2:
949 return req->rq_reqmsg->lm_repsize;
951 LASSERTF(0, "incorrect message magic: %08x\n",
952 req->rq_reqmsg->lm_magic);
958 ptlrpc_req_set_repsize(struct ptlrpc_request *req, int count, int *lens)
960 req->rq_replen = lustre_msg_size(req->rq_reqmsg->lm_magic, count, lens);
961 if (req->rq_reqmsg->lm_magic == LUSTRE_MSG_MAGIC_V2)
962 req->rq_reqmsg->lm_repsize = req->rq_replen;
965 /* ldlm/ldlm_lib.c */
966 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg);
967 int client_obd_cleanup(struct obd_device *obddev);
968 int client_connect_import(const struct lu_env *env,
969 struct lustre_handle *conn, struct obd_device *obd,
970 struct obd_uuid *cluuid, struct obd_connect_data *);
971 int client_disconnect_export(struct obd_export *exp);
972 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
974 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid);
975 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid);
977 /* ptlrpc/pinger.c */
978 int ptlrpc_pinger_add_import(struct obd_import *imp);
979 int ptlrpc_pinger_del_import(struct obd_import *imp);
980 cfs_time_t ptlrpc_suspend_wakeup_time(void);
982 void ping_evictor_start(void);
983 void ping_evictor_stop(void);
985 #define ping_evictor_start() do {} while (0)
986 #define ping_evictor_stop() do {} while (0)
988 int ptlrpc_check_and_wait_suspend(struct ptlrpc_request *req);
990 /* ptlrpc/ptlrpcd.c */
991 void ptlrpcd_wake(struct ptlrpc_request *req);
992 void ptlrpcd_add_req(struct ptlrpc_request *req);
993 int ptlrpcd_addref(void);
994 void ptlrpcd_decref(void);
996 /* ptlrpc/lproc_ptlrpc.c */
997 const char* ll_opcode2str(__u32 opcode);
999 void ptlrpc_lprocfs_register_obd(struct obd_device *obd);
1000 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd);
1001 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int opc, int bytes);
1003 static inline void ptlrpc_lprocfs_register_obd(struct obd_device *obd) {}
1004 static inline void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd) {}
1005 static inline void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int opc,
1009 /* ptlrpc/llog_server.c */
1010 int llog_origin_handle_create(struct ptlrpc_request *req);
1011 int llog_origin_handle_destroy(struct ptlrpc_request *req);
1012 int llog_origin_handle_prev_block(struct ptlrpc_request *req);
1013 int llog_origin_handle_next_block(struct ptlrpc_request *req);
1014 int llog_origin_handle_read_header(struct ptlrpc_request *req);
1015 int llog_origin_handle_close(struct ptlrpc_request *req);
1016 int llog_origin_handle_cancel(struct ptlrpc_request *req);
1017 int llog_catinfo(struct ptlrpc_request *req);
1019 /* ptlrpc/llog_client.c */
1020 extern struct llog_operations llog_client_ops;