1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
40 #if defined(__linux__)
41 #include <linux/lustre_net.h>
42 #elif defined(__APPLE__)
43 #include <darwin/lustre_net.h>
44 #elif defined(__WINNT__)
45 #include <winnt/lustre_net.h>
47 #error Unsupported operating system.
50 #include <libcfs/kp30.h>
52 #include <lnet/lnet.h>
53 #include <lustre/lustre_idl.h>
54 #include <lustre_ha.h>
55 #include <lustre_import.h>
56 #include <lprocfs_status.h>
58 #include <obd_support.h>
60 /* MD flags we _always_ use */
61 #define PTLRPC_MD_OPTIONS 0
63 /* Define maxima for bulk I/O
64 * CAVEAT EMPTOR, with multinet (i.e. routers forwarding between networks)
65 * these limits are system wide and not interface-local. */
66 #define PTLRPC_MAX_BRW_BITS LNET_MTU_BITS
67 #define PTLRPC_MAX_BRW_SIZE (1<<LNET_MTU_BITS)
68 #define PTLRPC_MAX_BRW_PAGES (PTLRPC_MAX_BRW_SIZE >> CFS_PAGE_SHIFT)
70 /* When PAGE_SIZE is a constant, we can check our arithmetic here with cpp! */
72 # if ((PTLRPC_MAX_BRW_PAGES & (PTLRPC_MAX_BRW_PAGES - 1)) != 0)
73 # error "PTLRPC_MAX_BRW_PAGES isn't a power of two"
75 # if (PTLRPC_MAX_BRW_SIZE != (PTLRPC_MAX_BRW_PAGES * CFS_PAGE_SIZE))
76 # error "PTLRPC_MAX_BRW_SIZE isn't PTLRPC_MAX_BRW_PAGES * CFS_PAGE_SIZE"
78 # if (PTLRPC_MAX_BRW_SIZE > LNET_MTU)
79 # error "PTLRPC_MAX_BRW_SIZE too big"
81 # if (PTLRPC_MAX_BRW_PAGES > LNET_MAX_IOV)
82 # error "PTLRPC_MAX_BRW_PAGES too big"
84 #endif /* __KERNEL__ */
86 /* Size over which to OBD_VMALLOC() rather than OBD_ALLOC() service request
88 #define SVC_BUF_VMALLOC_THRESHOLD (2 * CFS_PAGE_SIZE)
90 /* The following constants determine how memory is used to buffer incoming
93 * ?_NBUFS # buffers to allocate when growing the pool
94 * ?_BUFSIZE # bytes in a single request buffer
95 * ?_MAXREQSIZE # maximum request service will receive
97 * When fewer than ?_NBUFS/2 buffers are posted for receive, another chunk
98 * of ?_NBUFS is added to the pool.
100 * Messages larger than ?_MAXREQSIZE are dropped. Request buffers are
101 * considered full when less than ?_MAXREQSIZE is left in them.
104 #define LDLM_THREADS_AUTO_MIN \
105 min((int)(num_online_cpus() * num_online_cpus() * 2), 8)
106 #define LDLM_THREADS_AUTO_MAX (LDLM_THREADS_AUTO_MIN * 16)
107 #define LDLM_BL_THREADS LDLM_THREADS_AUTO_MIN
108 #define LDLM_NBUFS (64 * num_online_cpus())
109 #define LDLM_BUFSIZE (8 * 1024)
110 #define LDLM_MAXREQSIZE (5 * 1024)
111 #define LDLM_MAXREPSIZE (1024)
113 /* Absolute limits */
114 #define MDS_THREADS_MIN 2
115 #define MDS_THREADS_MAX 512
116 #define MDS_THREADS_MIN_READPAGE 2
117 #define MDS_NBUFS (64 * num_online_cpus())
118 #define MDS_BUFSIZE (8 * 1024)
119 /* Assume file name length = FNAME_MAX = 256 (true for ext3).
120 * path name length = PATH_MAX = 4096
121 * LOV MD size max = EA_MAX = 4000
122 * symlink: FNAME_MAX + PATH_MAX <- largest
123 * link: FNAME_MAX + PATH_MAX (mds_rec_link < mds_rec_create)
124 * rename: FNAME_MAX + FNAME_MAX
125 * open: FNAME_MAX + EA_MAX
127 * MDS_MAXREQSIZE ~= 4736 bytes =
128 * lustre_msg + ldlm_request + mds_body + mds_rec_create + FNAME_MAX + PATH_MAX
129 * MDS_MAXREPSIZE ~= 8300 bytes = lustre_msg + llog_header
130 * or, for mds_close() and mds_reint_unlink() on a many-OST filesystem:
131 * = 9210 bytes = lustre_msg + mds_body + 160 * (easize + cookiesize)
133 * Realistic size is about 512 bytes (20 character name + 128 char symlink),
134 * except in the open case where there are a large number of OSTs in a LOV.
136 #define MDS_MAXREQSIZE (5 * 1024)
137 #define MDS_MAXREPSIZE max(9 * 1024, 280 + LOV_MAX_STRIPE_COUNT * 56)
139 #define MGS_THREADS_AUTO_MIN 2
140 #define MGS_THREADS_AUTO_MAX 32
141 #define MGS_NBUFS (64 * num_online_cpus())
142 #define MGS_BUFSIZE (8 * 1024)
143 #define MGS_MAXREQSIZE (8 * 1024)
144 #define MGS_MAXREPSIZE (9 * 1024)
146 /* Absolute limits */
147 #define OSS_THREADS_MIN 3 /* difficult replies, HPQ, others */
148 #define OSS_THREADS_MAX 512
149 #define OST_NBUFS (64 * num_online_cpus())
150 #define OST_BUFSIZE (8 * 1024)
151 /* OST_MAXREQSIZE ~= 4768 bytes =
152 * lustre_msg + obdo + 16 * obd_ioobj + 256 * niobuf_remote
154 * - single object with 16 pages is 512 bytes
155 * - OST_MAXREQSIZE must be at least 1 page of cookies plus some spillover
157 #define OST_MAXREQSIZE (5 * 1024)
158 #define OST_MAXREPSIZE (9 * 1024)
160 /* Macro to hide a typecast. */
161 #define ptlrpc_req_async_args(req) ((void *)&req->rq_async_args)
163 struct ptlrpc_connection {
164 struct hlist_node c_hash;
166 lnet_process_id_t c_peer;
167 struct obd_uuid c_remote_uuid;
171 struct ptlrpc_client {
172 __u32 cli_request_portal;
173 __u32 cli_reply_portal;
177 /* state flags of requests */
178 /* XXX only ones left are those used by the bulk descs as well! */
179 #define PTL_RPC_FL_INTR (1 << 0) /* reply wait was interrupted by user */
180 #define PTL_RPC_FL_TIMEOUT (1 << 7) /* request timed out waiting for reply */
182 #define REQ_MAX_ACK_LOCKS 8
184 union ptlrpc_async_args {
185 /* Scratchpad for passing args to completion interpreter. Users
186 * cast to the struct of their choosing, and LASSERT that this is
187 * big enough. For _tons_ of context, OBD_ALLOC a struct and store
188 * a pointer to it here. The pointer_arg ensures this struct is at
189 * least big enough for that. */
190 void *pointer_arg[9];
194 struct ptlrpc_request_set;
195 typedef int (*set_interpreter_func)(struct ptlrpc_request_set *, void *, int);
197 struct ptlrpc_request_set {
198 int set_remaining; /* # uncompleted requests */
199 cfs_waitq_t set_waitq;
200 cfs_waitq_t *set_wakeup_ptr;
201 struct list_head set_requests;
202 struct list_head set_cblist; /* list of completion callbacks */
203 set_interpreter_func set_interpret; /* completion callback */
204 void *set_arg; /* completion context */
205 /* locked so that any old caller can communicate requests to
206 * the set holder who can then fold them into the lock-free set */
207 spinlock_t set_new_req_lock;
208 struct list_head set_new_requests;
211 struct ptlrpc_set_cbdata {
212 struct list_head psc_item;
213 set_interpreter_func psc_interpret;
217 struct ptlrpc_bulk_desc;
220 * ptlrpc callback & work item stuff
222 struct ptlrpc_cb_id {
223 void (*cbid_fn)(lnet_event_t *ev); /* specific callback fn */
224 void *cbid_arg; /* additional arg */
227 #define RS_MAX_LOCKS 4
230 struct ptlrpc_reply_state {
231 struct ptlrpc_cb_id rs_cb_id;
232 struct list_head rs_list;
233 struct list_head rs_exp_list;
234 struct list_head rs_obd_list;
236 struct list_head rs_debug_list;
238 /* updates to following flag serialised by srv_request_lock */
239 unsigned long rs_difficult:1; /* ACK/commit stuff */
240 unsigned long rs_scheduled:1; /* being handled? */
241 unsigned long rs_scheduled_ever:1;/* any schedule attempts? */
242 unsigned long rs_handled:1; /* been handled yet? */
243 unsigned long rs_on_net:1; /* reply_out_callback pending? */
244 unsigned long rs_prealloc:1; /* rs from prealloc list */
249 struct obd_export *rs_export;
250 struct ptlrpc_service *rs_service;
251 lnet_handle_md_t rs_md_h;
252 atomic_t rs_refcount;
254 /* locks awaiting client reply ACK */
256 struct lustre_handle rs_locks[RS_MAX_LOCKS];
257 ldlm_mode_t rs_modes[RS_MAX_LOCKS];
258 /* last member: variable sized reply message */
259 struct lustre_msg *rs_msg;
262 struct ptlrpc_thread;
265 RQ_PHASE_NEW = 0xebc0de00,
266 RQ_PHASE_RPC = 0xebc0de01,
267 RQ_PHASE_BULK = 0xebc0de02,
268 RQ_PHASE_INTERPRET = 0xebc0de03,
269 RQ_PHASE_COMPLETE = 0xebc0de04,
270 RQ_PHASE_UNREGISTERING = 0xebc0de05,
271 RQ_PHASE_UNDEFINED = 0xebc0de06
274 struct ptlrpc_request_pool {
276 struct list_head prp_req_list; /* list of ptlrpc_request structs */
278 void (*prp_populate)(struct ptlrpc_request_pool *, int);
283 struct ptlrpc_hpreq_ops {
285 * Check if the lock handle of the given lock is the same as
286 * taken from the request.
288 int (*hpreq_lock_match)(struct ptlrpc_request *, struct ldlm_lock *);
290 * Check if the request is a high priority one.
292 int (*hpreq_check)(struct ptlrpc_request *);
295 struct ptlrpc_request {
296 int rq_type; /* one of PTL_RPC_MSG_* */
297 struct list_head rq_list;
298 struct list_head rq_timed_list; /* server-side early replies */
299 struct list_head rq_history_list; /* server-side history */
300 struct list_head rq_exp_list; /* server-side per-export list */
301 struct ptlrpc_hpreq_ops *rq_ops; /* server-side hp handlers */
303 __u64 rq_history_seq; /* history sequence # */
304 /* the index of service's srv_at_array into which request is linked */
308 /* client-side flags are serialized by rq_lock */
309 unsigned long rq_intr:1, rq_replied:1, rq_err:1,
310 rq_timedout:1, rq_resend:1, rq_restart:1,
312 * when ->rq_replay is set, request is kept by the client even
313 * after server commits corresponding transaction. This is
314 * used for operations that require sequence of multiple
315 * requests to be replayed. The only example currently is file
316 * open/close. When last request in such a sequence is
317 * committed, ->rq_replay is cleared on all requests in the
321 rq_no_resend:1, rq_waiting:1, rq_receiving_reply:1,
322 rq_no_delay:1, rq_net_err:1, rq_early:1, rq_must_unlink:1,
323 /* server-side flags */
324 rq_packed_final:1, /* packed final reply */
325 rq_sent_final:1, /* stop sending early replies */
326 rq_hp:1, /* high priority RPC */
327 rq_at_linked:1; /* link into service's srv_at_array */
328 enum rq_phase rq_phase; /* one of RQ_PHASE_* */
329 enum rq_phase rq_next_phase; /* one of RQ_PHASE_* to be used next */
330 atomic_t rq_refcount; /* client-side refcount for SENT race,
331 server-side refcounf for multiple replies */
333 struct ptlrpc_thread *rq_svc_thread; /* initial thread servicing req */
335 int rq_request_portal; /* XXX FIXME bug 249 */
336 int rq_reply_portal; /* XXX FIXME bug 249 */
338 int rq_nob_received; /* client-side # reply bytes actually received */
341 struct lustre_msg *rq_reqmsg;
344 struct lustre_msg *rq_repbuf; /* client only, buf may be bigger than msg */
345 struct lustre_msg *rq_repmsg;
348 struct list_head rq_replay_list;
350 __u32 rq_req_swab_mask;
351 __u32 rq_rep_swab_mask;
353 int rq_import_generation;
354 enum lustre_imp_state rq_send_state;
356 int rq_early_count; /* how many early replies (for stats) */
358 /* client+server request */
359 lnet_handle_md_t rq_req_md_h;
360 struct ptlrpc_cb_id rq_req_cbid;
363 struct timeval rq_arrival_time; /* request arrival time */
364 struct ptlrpc_reply_state *rq_reply_state; /* separated reply state */
365 struct ptlrpc_request_buffer_desc *rq_rqbd; /* incoming request buffer*/
367 __u32 rq_uid; /* peer uid, used in MDS only */
370 /* client-only incoming reply */
371 lnet_handle_md_t rq_reply_md_h;
372 cfs_waitq_t rq_reply_waitq;
373 struct ptlrpc_cb_id rq_reply_cbid;
376 lnet_process_id_t rq_peer;
377 struct obd_export *rq_export;
378 struct obd_import *rq_import;
380 void (*rq_replay_cb)(struct ptlrpc_request *);
381 void (*rq_commit_cb)(struct ptlrpc_request *);
384 struct ptlrpc_bulk_desc *rq_bulk; /* client side bulk */
385 /* client outgoing req */
386 time_t rq_sent; /* when request sent, seconds,
387 * or time when request should
389 volatile time_t rq_deadline; /* when request must finish. volatile
390 so that servers' early reply updates to the deadline aren't
391 kept in per-cpu cache */
392 time_t rq_reply_deadline; /* when req reply unlink must finish. */
393 time_t rq_bulk_deadline; /* when req bulk unlink must finish. */
394 int rq_timeout; /* service time estimate (secs) */
397 struct list_head rq_set_chain;
398 struct ptlrpc_request_set *rq_set;
399 void *rq_interpret_reply; /* Async completion handler */
400 union ptlrpc_async_args rq_async_args; /* Async completion context */
401 struct ptlrpc_request_pool *rq_pool; /* Pool if request from
405 static inline void lustre_set_req_swabbed(struct ptlrpc_request *req, int index)
407 LASSERT(index < sizeof(req->rq_req_swab_mask) * 8);
408 LASSERT((req->rq_req_swab_mask & (1 << index)) == 0);
409 req->rq_req_swab_mask |= 1 << index;
412 static inline void lustre_set_rep_swabbed(struct ptlrpc_request *req, int index)
414 LASSERT(index < sizeof(req->rq_rep_swab_mask) * 8);
415 LASSERT((req->rq_rep_swab_mask & (1 << index)) == 0);
416 req->rq_rep_swab_mask |= 1 << index;
419 static inline int lustre_req_swabbed(struct ptlrpc_request *req, int index)
421 LASSERT(index < sizeof(req->rq_req_swab_mask) * 8);
422 return req->rq_req_swab_mask & (1 << index);
425 static inline int lustre_rep_swabbed(struct ptlrpc_request *req, int index)
427 LASSERT(index < sizeof(req->rq_rep_swab_mask) * 8);
428 return req->rq_rep_swab_mask & (1 << index);
431 static inline int lustre_req_need_swab(struct ptlrpc_request *req)
433 return req->rq_req_swab_mask & (1 << MSG_PTLRPC_HEADER_OFF);
436 static inline int lustre_rep_need_swab(struct ptlrpc_request *req)
438 return req->rq_rep_swab_mask & (1 << MSG_PTLRPC_HEADER_OFF);
441 static inline const char *
442 ptlrpc_phase2str(enum rq_phase phase)
451 case RQ_PHASE_INTERPRET:
453 case RQ_PHASE_COMPLETE:
455 case RQ_PHASE_UNREGISTERING:
456 return "Unregistering";
462 static inline const char *
463 ptlrpc_rqphase2str(struct ptlrpc_request *req)
465 return ptlrpc_phase2str(req->rq_phase);
468 /* Spare the preprocessor, spoil the bugs. */
469 #define FLAG(field, str) (field ? str : "")
471 #define DEBUG_REQ_FLAGS(req) \
472 ptlrpc_rqphase2str(req), \
473 FLAG(req->rq_intr, "I"), FLAG(req->rq_replied, "R"), \
474 FLAG(req->rq_err, "E"), \
475 FLAG(req->rq_timedout, "X") /* eXpired */, FLAG(req->rq_resend, "S"), \
476 FLAG(req->rq_restart, "T"), FLAG(req->rq_replay, "P"), \
477 FLAG(req->rq_no_resend, "N"), \
478 FLAG(req->rq_waiting, "W"), FLAG(req->rq_hp, "H")
480 #define REQ_FLAGS_FMT "%s:%s%s%s%s%s%s%s%s%s%s"
482 void _debug_req(struct ptlrpc_request *req, __u32 mask,
483 struct libcfs_debug_msg_data *data, const char *fmt, ...)
484 __attribute__ ((format (printf, 4, 5)));
486 #define debug_req(cdls, level, req, file, func, line, fmt, a...) \
490 if (((level) & D_CANTMASK) != 0 || \
491 ((libcfs_debug & (level)) != 0 && \
492 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) { \
493 static struct libcfs_debug_msg_data _req_dbg_data = \
494 DEBUG_MSG_DATA_INIT(cdls, DEBUG_SUBSYSTEM, file, func, line); \
495 _debug_req((req), (level), &_req_dbg_data, fmt, ##a); \
499 /* for most callers (level is a constant) this is resolved at compile time */
500 #define DEBUG_REQ(level, req, fmt, args...) \
502 if ((level) & (D_ERROR | D_WARNING)) { \
503 static cfs_debug_limit_state_t cdls; \
504 debug_req(&cdls, level, req, __FILE__, __func__, __LINE__, \
505 "@@@ "fmt" ", ## args); \
507 debug_req(NULL, level, req, __FILE__, __func__, __LINE__, \
508 "@@@ "fmt" ", ## args); \
511 struct ptlrpc_bulk_page {
512 struct list_head bp_link;
514 int bp_pageoffset; /* offset within a page */
515 struct page *bp_page;
518 #define BULK_GET_SOURCE 0
519 #define BULK_PUT_SINK 1
520 #define BULK_GET_SINK 2
521 #define BULK_PUT_SOURCE 3
523 struct ptlrpc_bulk_desc {
524 unsigned long bd_success:1; /* completed successfully */
525 unsigned long bd_network_rw:1; /* accessible to the network */
526 unsigned long bd_type:2; /* {put,get}{source,sink} */
527 unsigned long bd_registered:1; /* client side */
528 spinlock_t bd_lock; /* serialise with callback */
529 int bd_import_generation;
530 struct obd_export *bd_export;
531 struct obd_import *bd_import;
533 struct ptlrpc_request *bd_req; /* associated request */
534 cfs_waitq_t bd_waitq; /* server side only WQ */
535 int bd_iov_count; /* # entries in bd_iov */
536 int bd_max_iov; /* allocated size of bd_iov */
537 int bd_nob; /* # bytes covered */
538 int bd_nob_transferred; /* # bytes GOT/PUT */
542 struct ptlrpc_cb_id bd_cbid; /* network callback info */
543 lnet_handle_md_t bd_md_h; /* associated MD */
544 lnet_nid_t bd_sender; /* stash event::sender */
546 #if defined(__KERNEL__)
547 lnet_kiov_t bd_iov[0];
549 lnet_md_iovec_t bd_iov[0];
553 struct ptlrpc_thread {
555 struct list_head t_link; /* active threads in svc->srv_threads */
557 void *t_data; /* thread-private data (preallocated memory) */
560 unsigned int t_id; /* service thread index, from ptlrpc_start_threads */
561 struct lc_watchdog *t_watchdog; /* put watchdog in the structure per
563 cfs_waitq_t t_ctl_waitq;
566 struct ptlrpc_request_buffer_desc {
567 struct list_head rqbd_list;
568 struct list_head rqbd_reqs;
569 struct ptlrpc_service *rqbd_service;
570 lnet_handle_md_t rqbd_md_h;
573 struct ptlrpc_cb_id rqbd_cbid;
574 struct ptlrpc_request rqbd_req;
577 typedef int (*svc_handler_t)(struct ptlrpc_request *req);
578 typedef void (*svcreq_printfn_t)(void *, struct ptlrpc_request *);
579 typedef int (*svc_hpreq_handler_t)(struct ptlrpc_request *);
581 #define PTLRPC_SVC_HP_RATIO 10
583 struct ptlrpc_service {
584 struct list_head srv_list; /* chain thru all services */
585 int srv_max_req_size; /* biggest request to receive */
586 int srv_max_reply_size; /* biggest reply to send */
587 int srv_buf_size; /* size of individual buffers */
588 int srv_nbuf_per_group; /* # buffers to allocate in 1 group */
589 int srv_nbufs; /* total # req buffer descs allocated */
590 int srv_threads_min; /* threads to start at SOW */
591 int srv_threads_max; /* thread upper limit */
592 int srv_threads_started; /* index of last started thread */
593 int srv_threads_running; /* # running threads */
594 int srv_n_difficult_replies; /* # 'difficult' replies */
595 int srv_n_active_reqs; /* # reqs being served */
596 int srv_n_hpreq; /* # HPreqs being served */
597 cfs_duration_t srv_rqbd_timeout; /* timeout before re-posting reqs, in tick */
598 int srv_watchdog_factor; /* soft watchdog timeout mutiplier */
599 unsigned srv_cpu_affinity:1; /* bind threads to CPUs */
600 unsigned srv_at_check:1; /* check early replies */
601 cfs_time_t srv_at_checktime; /* debug */
603 __u32 srv_req_portal;
604 __u32 srv_rep_portal;
607 struct adaptive_timeout srv_at_estimate;/* estimated rpc service time */
608 spinlock_t srv_at_lock;
609 struct ptlrpc_at_array srv_at_array; /* reqs waiting for replies */
610 cfs_timer_t srv_at_timer; /* early reply timer */
612 int srv_n_queued_reqs; /* # reqs in either of the queues below */
613 int srv_hpreq_count; /* # hp requests handled */
614 int srv_hpreq_ratio; /* # hp per lp reqs to handle */
615 struct list_head srv_req_in_queue; /* incoming reqs */
616 struct list_head srv_request_queue; /* reqs waiting for service */
617 struct list_head srv_request_hpq; /* high priority queue */
619 struct list_head srv_request_history; /* request history */
620 __u64 srv_request_seq; /* next request sequence # */
621 __u64 srv_request_max_cull_seq; /* highest seq culled from history */
622 svcreq_printfn_t srv_request_history_print_fn; /* service-specific print fn */
624 struct list_head srv_idle_rqbds; /* request buffers to be reposted */
625 struct list_head srv_active_rqbds; /* req buffers receiving */
626 struct list_head srv_history_rqbds; /* request buffer history */
627 int srv_nrqbd_receiving; /* # posted request buffers */
628 int srv_n_history_rqbds; /* # request buffers in history */
629 int srv_max_history_rqbds;/* max # request buffers in history */
631 atomic_t srv_outstanding_replies;
632 struct list_head srv_active_replies; /* all the active replies */
633 struct list_head srv_reply_queue; /* replies waiting for service */
635 cfs_waitq_t srv_waitq; /* all threads sleep on this. This
636 * wait-queue is signalled when new
637 * incoming request arrives and when
638 * difficult reply has to be handled. */
640 struct list_head srv_threads; /* service thread list */
641 svc_handler_t srv_handler;
642 svc_hpreq_handler_t srv_hpreq_handler; /* hp request handler */
644 char *srv_name; /* only statically allocated strings here; we don't clean them */
645 char *srv_thread_name; /* only statically allocated strings here; we don't clean them */
649 cfs_proc_dir_entry_t *srv_procroot;
650 struct lprocfs_stats *srv_stats;
652 /* List of free reply_states */
653 struct list_head srv_free_rs_list;
654 /* waitq to run, when adding stuff to srv_free_rs_list */
655 cfs_waitq_t srv_free_rs_waitq;
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];
673 * Ptlrpc thread control flags (LIOD_START, LIOD_STOP, LIOD_FORCE)
675 unsigned long pc_flags;
677 * Thread lock protecting structure fields.
683 struct completion pc_starting;
687 struct completion pc_finishing;
689 * Thread requests set.
691 struct ptlrpc_request_set *pc_set;
693 * Thread name used in cfs_daemonize()
698 * Async rpcs flag to make sure that ptlrpcd_check() is called only
703 * Currently not used.
707 * User-space async rpcs callback.
709 void *pc_wait_callback;
711 * User-space check idle rpcs callback.
713 void *pc_idle_callback;
717 /* Bits for pc_flags */
718 enum ptlrpcd_ctl_flags {
720 * Ptlrpc thread start flag.
724 * Ptlrpc thread stop flag.
728 * Ptlrpc thread force flag (only stop force so far).
729 * This will cause aborting any inflight rpcs handled
730 * by thread if LIOD_STOP is specified.
735 /* ptlrpc/events.c */
736 extern lnet_handle_eq_t ptlrpc_eq_h;
737 extern int ptlrpc_uuid_to_peer(struct obd_uuid *uuid,
738 lnet_process_id_t *peer, lnet_nid_t *self);
739 extern void request_out_callback (lnet_event_t *ev);
740 extern void reply_in_callback(lnet_event_t *ev);
741 extern void client_bulk_callback (lnet_event_t *ev);
742 extern void request_in_callback(lnet_event_t *ev);
743 extern void reply_out_callback(lnet_event_t *ev);
744 extern void server_bulk_callback (lnet_event_t *ev);
746 /* ptlrpc/connection.c */
747 struct ptlrpc_connection *ptlrpc_connection_get(lnet_process_id_t peer,
749 struct obd_uuid *uuid);
750 int ptlrpc_connection_put(struct ptlrpc_connection *c);
751 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *);
752 int ptlrpc_connection_init(void);
753 void ptlrpc_connection_fini(void);
754 extern lnet_pid_t ptl_get_pid(void);
756 /* ptlrpc/niobuf.c */
757 int ptlrpc_start_bulk_transfer(struct ptlrpc_bulk_desc *desc);
758 void ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *desc);
759 int ptlrpc_register_bulk(struct ptlrpc_request *req);
760 int ptlrpc_unregister_bulk(struct ptlrpc_request *req, int async);
762 static inline int ptlrpc_server_bulk_active(struct ptlrpc_bulk_desc *desc)
766 LASSERT(desc != NULL);
768 spin_lock(&desc->bd_lock);
769 rc = desc->bd_network_rw;
770 spin_unlock(&desc->bd_lock);
774 static inline int ptlrpc_client_bulk_active(struct ptlrpc_request *req)
776 struct ptlrpc_bulk_desc *desc = req->rq_bulk;
779 LASSERT(req != NULL);
781 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK) &&
782 req->rq_bulk_deadline > cfs_time_current_sec())
788 spin_lock(&desc->bd_lock);
789 rc = desc->bd_network_rw;
790 spin_unlock(&desc->bd_lock);
794 #define PTLRPC_REPLY_MAYBE_DIFFICULT 0x01
795 #define PTLRPC_REPLY_EARLY 0x02
796 int ptlrpc_send_reply(struct ptlrpc_request *req, int flags);
797 int ptlrpc_reply(struct ptlrpc_request *req);
798 int ptlrpc_send_error(struct ptlrpc_request *req, int difficult);
799 int ptlrpc_error(struct ptlrpc_request *req);
800 void ptlrpc_resend_req(struct ptlrpc_request *request);
801 int ptlrpc_at_get_net_latency(struct ptlrpc_request *req);
802 int ptl_send_rpc(struct ptlrpc_request *request, int noreply);
803 int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd);
805 /* ptlrpc/client.c */
806 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
807 struct ptlrpc_client *);
808 void ptlrpc_cleanup_client(struct obd_import *imp);
809 struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid);
811 int ptlrpc_queue_wait(struct ptlrpc_request *req);
812 int ptlrpc_replay_req(struct ptlrpc_request *req);
813 int ptlrpc_unregister_reply(struct ptlrpc_request *req, int async);
814 void ptlrpc_restart_req(struct ptlrpc_request *req);
815 void ptlrpc_abort_inflight(struct obd_import *imp);
816 void ptlrpc_cleanup_imp(struct obd_import *imp);
817 void ptlrpc_abort_set(struct ptlrpc_request_set *set);
819 struct ptlrpc_request_set *ptlrpc_prep_set(void);
820 int ptlrpc_set_add_cb(struct ptlrpc_request_set *set,
821 set_interpreter_func fn, void *data);
822 int ptlrpc_set_next_timeout(struct ptlrpc_request_set *);
823 int ptlrpc_check_set(struct ptlrpc_request_set *set);
824 int ptlrpc_set_wait(struct ptlrpc_request_set *);
825 int ptlrpc_expired_set(void *data);
826 void ptlrpc_interrupted_set(void *data);
827 void ptlrpc_mark_interrupted(struct ptlrpc_request *req);
828 void ptlrpc_set_destroy(struct ptlrpc_request_set *);
829 void ptlrpc_set_add_req(struct ptlrpc_request_set *, struct ptlrpc_request *);
830 int ptlrpc_set_add_new_req(struct ptlrpcd_ctl *pc,
831 struct ptlrpc_request *req);
833 void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool);
834 void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq);
836 struct ptlrpc_request_pool *
837 ptlrpc_init_rq_pool(int, int,
838 void (*populate_pool)(struct ptlrpc_request_pool *, int));
840 void ptlrpc_at_set_req_timeout(struct ptlrpc_request *req);
841 struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, __u32 version,
842 int opcode, int count, __u32 *lengths,
844 struct ptlrpc_request *ptlrpc_prep_req_pool(struct obd_import *imp,
845 __u32 version, int opcode,
846 int count, __u32 *lengths, char **bufs,
847 struct ptlrpc_request_pool *pool);
848 void ptlrpc_req_finished(struct ptlrpc_request *request);
849 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request);
850 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req);
851 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp (struct ptlrpc_request *req,
852 int npages, int type, int portal);
853 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp(struct ptlrpc_request *req,
854 int npages, int type, int portal);
855 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk);
856 void ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
857 cfs_page_t *page, int pageoffset, int len);
858 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
859 struct obd_import *imp);
860 __u64 ptlrpc_next_xid(void);
861 __u64 ptlrpc_sample_next_xid(void);
862 __u64 ptlrpc_req_xid(struct ptlrpc_request *request);
864 /* ptlrpc/service.c */
865 void ptlrpc_save_lock (struct ptlrpc_request *req,
866 struct lustre_handle *lock, int mode);
867 void ptlrpc_commit_replies (struct obd_export *exp);
868 void ptlrpc_schedule_difficult_reply (struct ptlrpc_reply_state *rs);
869 struct ptlrpc_service *ptlrpc_init_svc(int nbufs, int bufsize, int max_req_size,
871 int req_portal, int rep_portal,
873 svc_handler_t, char *name,
874 cfs_proc_dir_entry_t *proc_entry,
876 int min_threads, int max_threads,
877 char *threadname, svc_hpreq_handler_t);
878 void ptlrpc_stop_all_threads(struct ptlrpc_service *svc);
880 int ptlrpc_start_threads(struct obd_device *dev, struct ptlrpc_service *svc);
881 int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc);
882 int ptlrpc_unregister_service(struct ptlrpc_service *service);
883 int liblustre_check_services (void *arg);
884 void ptlrpc_daemonize(char *name);
885 int ptlrpc_service_health_check(struct ptlrpc_service *);
886 void ptlrpc_hpreq_reorder(struct ptlrpc_request *req);
889 struct ptlrpc_svc_data {
891 struct ptlrpc_service *svc;
892 struct ptlrpc_thread *thread;
893 struct obd_device *dev;
896 /* ptlrpc/import.c */
897 int ptlrpc_connect_import(struct obd_import *imp, char * new_uuid);
898 int ptlrpc_init_import(struct obd_import *imp);
899 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose);
900 int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
901 void ptlrpc_import_setasync(struct obd_import *imp, int count);
902 int ptlrpc_reconnect_import(struct obd_import *imp);
904 /* ptlrpc/pack_generic.c */
905 int lustre_msg_swabbed(struct lustre_msg *msg);
906 int lustre_msg_check_version(struct lustre_msg *msg, __u32 version);
907 int lustre_pack_request(struct ptlrpc_request *, __u32 magic, int count,
908 __u32 *lens, char **bufs);
909 int lustre_pack_reply(struct ptlrpc_request *, int count, __u32 *lens,
911 #define LPRFL_EARLY_REPLY 1
912 int lustre_pack_reply_flags(struct ptlrpc_request *, int count, __u32 *lens,
913 char **bufs, int flags);
914 void lustre_shrink_reply(struct ptlrpc_request *req, int segment,
915 unsigned int newlen, int move_data);
916 void lustre_free_reply_state(struct ptlrpc_reply_state *rs);
917 int lustre_msg_size(__u32 magic, int count, __u32 *lengths);
918 int lustre_packed_msg_size(struct lustre_msg *msg);
919 int lustre_msg_early_size(struct ptlrpc_request *req);
920 int lustre_unpack_msg(struct lustre_msg *m, int len);
921 void *lustre_msg_buf(struct lustre_msg *m, int n, int minlen);
922 int lustre_msg_buflen(struct lustre_msg *m, int n);
923 void lustre_msg_set_buflen(struct lustre_msg *m, int n, int len);
924 int lustre_msg_bufcount(struct lustre_msg *m);
925 char *lustre_msg_string (struct lustre_msg *m, int n, int max_len);
926 void *lustre_swab_reqbuf(struct ptlrpc_request *req, int n, int minlen,
928 void *lustre_swab_repbuf(struct ptlrpc_request *req, int n, int minlen,
930 __u32 lustre_msghdr_get_flags(struct lustre_msg *msg);
931 void lustre_msghdr_set_flags(struct lustre_msg *msg, __u32 flags);
932 __u32 lustre_msg_get_flags(struct lustre_msg *msg);
933 void lustre_msg_add_flags(struct lustre_msg *msg, int flags);
934 void lustre_msg_set_flags(struct lustre_msg *msg, int flags);
935 void lustre_msg_clear_flags(struct lustre_msg *msg, int flags);
936 __u32 lustre_msg_get_op_flags(struct lustre_msg *msg);
937 void lustre_msg_add_op_flags(struct lustre_msg *msg, int flags);
938 void lustre_msg_set_op_flags(struct lustre_msg *msg, int flags);
939 struct lustre_handle *lustre_msg_get_handle(struct lustre_msg *msg);
940 __u32 lustre_msg_get_type(struct lustre_msg *msg);
941 __u32 lustre_msg_get_version(struct lustre_msg *msg);
942 void lustre_msg_add_version(struct lustre_msg *msg, int version);
943 __u32 lustre_msg_get_opc(struct lustre_msg *msg);
944 __u64 lustre_msg_get_last_xid(struct lustre_msg *msg);
945 __u64 lustre_msg_get_last_committed(struct lustre_msg *msg);
946 __u64 *lustre_msg_get_versions(struct lustre_msg *msg);
947 __u64 lustre_msg_get_transno(struct lustre_msg *msg);
948 __u64 lustre_msg_get_slv(struct lustre_msg *msg);
949 __u32 lustre_msg_get_limit(struct lustre_msg *msg);
950 void lustre_msg_set_slv(struct lustre_msg *msg, __u64 slv);
951 void lustre_msg_set_limit(struct lustre_msg *msg, __u64 limit);
952 int lustre_msg_get_status(struct lustre_msg *msg);
953 __u32 lustre_msg_get_conn_cnt(struct lustre_msg *msg);
954 int lustre_msg_is_v1(struct lustre_msg *msg);
955 __u32 lustre_msg_get_magic(struct lustre_msg *msg);
956 __u32 lustre_msg_get_timeout(struct lustre_msg *msg);
957 __u32 lustre_msg_get_service_time(struct lustre_msg *msg);
958 __u32 lustre_msg_get_cksum(struct lustre_msg *msg);
959 __u32 lustre_msg_calc_cksum(struct lustre_msg *msg);
960 void lustre_msg_set_handle(struct lustre_msg *msg,struct lustre_handle *handle);
961 void lustre_msg_set_type(struct lustre_msg *msg, __u32 type);
962 void lustre_msg_set_opc(struct lustre_msg *msg, __u32 opc);
963 void lustre_msg_set_last_xid(struct lustre_msg *msg, __u64 last_xid);
964 void lustre_msg_set_last_committed(struct lustre_msg *msg,__u64 last_committed);
965 void lustre_msg_set_versions(struct lustre_msg *msg, __u64 *versions);
966 void lustre_msg_set_transno(struct lustre_msg *msg, __u64 transno);
967 void lustre_msg_set_status(struct lustre_msg *msg, __u32 status);
968 void lustre_msg_set_conn_cnt(struct lustre_msg *msg, __u32 conn_cnt);
969 void lustre_msg_set_timeout(struct lustre_msg *msg, __u32 timeout);
970 void lustre_msg_set_service_time(struct lustre_msg *msg, __u32 service_time);
971 void lustre_msg_set_cksum(struct lustre_msg *msg, __u32 cksum);
974 ptlrpc_rqphase_move(struct ptlrpc_request *req, enum rq_phase new_phase)
976 if (req->rq_phase == new_phase)
979 if (new_phase == RQ_PHASE_UNREGISTERING) {
980 req->rq_next_phase = req->rq_phase;
982 atomic_inc(&req->rq_import->imp_unregistering);
985 if (req->rq_phase == RQ_PHASE_UNREGISTERING) {
987 atomic_dec(&req->rq_import->imp_unregistering);
990 DEBUG_REQ(D_RPCTRACE, req, "move req \"%s\" -> \"%s\"",
991 ptlrpc_rqphase2str(req), ptlrpc_phase2str(new_phase));
993 req->rq_phase = new_phase;
997 ptlrpc_client_early(struct ptlrpc_request *req)
999 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
1000 req->rq_reply_deadline > cfs_time_current_sec())
1002 return req->rq_early;
1006 ptlrpc_client_replied(struct ptlrpc_request *req)
1008 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
1009 req->rq_reply_deadline > cfs_time_current_sec())
1011 return req->rq_replied;
1015 ptlrpc_client_recv(struct ptlrpc_request *req)
1017 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
1018 req->rq_reply_deadline > cfs_time_current_sec())
1020 return req->rq_receiving_reply;
1024 ptlrpc_client_recv_or_unlink(struct ptlrpc_request *req)
1028 spin_lock(&req->rq_lock);
1029 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
1030 req->rq_reply_deadline > cfs_time_current_sec()) {
1031 spin_unlock(&req->rq_lock);
1034 rc = req->rq_receiving_reply || req->rq_must_unlink;
1035 spin_unlock(&req->rq_lock);
1040 ptlrpc_client_wake_req(struct ptlrpc_request *req)
1042 if (req->rq_set == NULL)
1043 cfs_waitq_signal(&req->rq_reply_waitq);
1045 cfs_waitq_signal(&req->rq_set->set_waitq);
1049 ptlrpc_rs_addref(struct ptlrpc_reply_state *rs)
1051 LASSERT(atomic_read(&rs->rs_refcount) > 0);
1052 atomic_inc(&rs->rs_refcount);
1056 ptlrpc_rs_decref(struct ptlrpc_reply_state *rs)
1058 LASSERT(atomic_read(&rs->rs_refcount) > 0);
1059 if (atomic_dec_and_test(&rs->rs_refcount))
1060 lustre_free_reply_state(rs);
1063 /* Should only be called once per req */
1064 static inline void ptlrpc_req_drop_rs(struct ptlrpc_request *req)
1066 if (req->rq_reply_state == NULL)
1067 return; /* shouldn't occur */
1068 ptlrpc_rs_decref(req->rq_reply_state);
1069 req->rq_reply_state = NULL;
1070 req->rq_repmsg = NULL;
1073 static inline __u32 lustre_request_magic(struct ptlrpc_request *req)
1075 return lustre_msg_get_magic(req->rq_reqmsg);
1078 static inline int ptlrpc_req_get_repsize(struct ptlrpc_request *req)
1080 switch (req->rq_reqmsg->lm_magic) {
1081 case LUSTRE_MSG_MAGIC_V1:
1082 CERROR("function not supported for lustre_msg V1!\n");
1084 case LUSTRE_MSG_MAGIC_V2:
1085 return req->rq_reqmsg->lm_repsize;
1087 LASSERTF(0, "incorrect message magic: %08x\n",
1088 req->rq_reqmsg->lm_magic);
1094 ptlrpc_req_set_repsize(struct ptlrpc_request *req, int count, __u32 *lens)
1096 int size = lustre_msg_size(req->rq_reqmsg->lm_magic, count, lens);
1098 req->rq_replen = size + lustre_msg_early_size(req);
1099 if (req->rq_reqmsg->lm_magic == LUSTRE_MSG_MAGIC_V2)
1100 req->rq_reqmsg->lm_repsize = size;
1103 /* ldlm/ldlm_lib.c */
1104 int client_obd_setup(struct obd_device *obddev, obd_count len, void *buf);
1105 int client_obd_cleanup(struct obd_device * obddev);
1106 int client_connect_import(struct lustre_handle *conn, struct obd_device *obd,
1107 struct obd_uuid *cluuid, struct obd_connect_data *,
1109 int client_disconnect_export(struct obd_export *exp);
1110 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
1112 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid);
1113 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid);
1115 /* ptlrpc/pinger.c */
1116 enum timeout_event {
1119 struct timeout_item;
1120 typedef int (*timeout_cb_t)(struct timeout_item *, void *);
1121 int ptlrpc_pinger_add_import(struct obd_import *imp);
1122 int ptlrpc_pinger_del_import(struct obd_import *imp);
1123 int ptlrpc_add_timeout_client(int time, enum timeout_event event,
1124 timeout_cb_t cb, void *data,
1125 struct list_head *obd_list);
1126 int ptlrpc_del_timeout_client(struct list_head *obd_list);
1127 struct ptlrpc_request * ptlrpc_prep_ping(struct obd_import *imp);
1128 int ptlrpc_obd_ping(struct obd_device *obd);
1130 void ping_evictor_start(void);
1131 void ping_evictor_stop(void);
1133 #define ping_evictor_start() do {} while (0)
1134 #define ping_evictor_stop() do {} while (0)
1137 /* ptlrpc/ptlrpcd.c */
1138 int ptlrpcd_start(char *name, struct ptlrpcd_ctl *pc);
1139 void ptlrpcd_stop(struct ptlrpcd_ctl *pc, int force);
1140 void ptlrpcd_wake(struct ptlrpc_request *req);
1141 void ptlrpcd_add_req(struct ptlrpc_request *req);
1142 void ptlrpcd_add_rqset(struct ptlrpc_request_set *set);
1143 int ptlrpcd_addref(void);
1144 void ptlrpcd_decref(void);
1146 /* ptlrpc/lproc_ptlrpc.c */
1147 const char* ll_opcode2str(__u32 opcode);
1149 void ptlrpc_lprocfs_register_obd(struct obd_device *obd);
1150 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd);
1151 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes);
1153 static inline void ptlrpc_lprocfs_register_obd(struct obd_device *obd) {}
1154 static inline void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd) {}
1155 static inline void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes) {}
1158 /* ptlrpc/llog_server.c */
1159 int llog_origin_handle_create(struct ptlrpc_request *req);
1160 int llog_origin_handle_destroy(struct ptlrpc_request *req);
1161 int llog_origin_handle_prev_block(struct ptlrpc_request *req);
1162 int llog_origin_handle_next_block(struct ptlrpc_request *req);
1163 int llog_origin_handle_read_header(struct ptlrpc_request *req);
1164 int llog_origin_handle_close(struct ptlrpc_request *req);
1165 int llog_origin_handle_cancel(struct ptlrpc_request *req);
1166 int llog_catinfo(struct ptlrpc_request *req);
1168 /* ptlrpc/llog_client.c */
1169 extern struct llog_operations llog_client_ops;