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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2010, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 /** \defgroup PtlRPC Portal RPC and networking module.
33 * PortalRPC is the layer used by rest of lustre code to achieve network
34 * communications: establish connections with corresponding export and import
35 * states, listen for a service, send and receive RPCs.
36 * PortalRPC also includes base recovery framework: packet resending and
37 * replaying, reconnections, pinger.
39 * PortalRPC utilizes LNet as its transport layer.
52 #include <linux/kobject.h>
53 #include <linux/rhashtable.h>
54 #include <linux/uio.h>
55 #include <libcfs/libcfs.h>
57 #include <lnet/lib-types.h>
58 #include <uapi/linux/lnet/nidstr.h>
59 #include <uapi/linux/lustre/lustre_idl.h>
60 #include <lustre_ha.h>
61 #include <lustre_sec.h>
62 #include <lustre_import.h>
63 #include <lprocfs_status.h>
64 #include <lu_object.h>
65 #include <lustre_req_layout.h>
66 #include <obd_support.h>
67 #include <uapi/linux/lustre/lustre_ver.h>
69 /* MD flags we _always_ use */
70 #define PTLRPC_MD_OPTIONS 0
73 * log2 max # of bulk operations in one request: 2=4MB/RPC, 5=32MB/RPC, ...
74 * In order for the client and server to properly negotiate the maximum
75 * possible transfer size, PTLRPC_BULK_OPS_COUNT must be a power-of-two
76 * value. The client is free to limit the actual RPC size for any bulk
77 * transfer via cl_max_pages_per_rpc to some non-power-of-two value.
78 * NOTE: This is limited to 16 (=64GB RPCs) by IOOBJ_MAX_BRW_BITS. */
79 #define PTLRPC_BULK_OPS_BITS 6
80 #if PTLRPC_BULK_OPS_BITS > 16
81 #error "More than 65536 BRW RPCs not allowed by IOOBJ_MAX_BRW_BITS."
83 #define PTLRPC_BULK_OPS_COUNT (1U << PTLRPC_BULK_OPS_BITS)
85 * PTLRPC_BULK_OPS_MASK is for the convenience of the client only, and
86 * should not be used on the server at all. Otherwise, it imposes a
87 * protocol limitation on the maximum RPC size that can be used by any
88 * RPC sent to that server in the future. Instead, the server should
89 * use the negotiated per-client ocd_brw_size to determine the bulk
91 #define PTLRPC_BULK_OPS_MASK (~((__u64)PTLRPC_BULK_OPS_COUNT - 1))
94 * Define maxima for bulk I/O.
96 * A single PTLRPC BRW request is sent via up to PTLRPC_BULK_OPS_COUNT
97 * of LNET_MTU sized RDMA transfers. Clients and servers negotiate the
98 * currently supported maximum between peers at connect via ocd_brw_size.
100 #define PTLRPC_MAX_BRW_BITS (LNET_MTU_BITS + PTLRPC_BULK_OPS_BITS)
101 #define PTLRPC_MAX_BRW_SIZE (1U << PTLRPC_MAX_BRW_BITS)
102 #define PTLRPC_MAX_BRW_PAGES (PTLRPC_MAX_BRW_SIZE >> PAGE_SHIFT)
104 #define ONE_MB_BRW_SIZE (1U << LNET_MTU_BITS)
105 #define MD_MAX_BRW_SIZE (1U << LNET_MTU_BITS)
106 #define MD_MAX_BRW_PAGES (MD_MAX_BRW_SIZE >> PAGE_SHIFT)
107 #define DT_MAX_BRW_SIZE PTLRPC_MAX_BRW_SIZE
108 #define DT_DEF_BRW_SIZE (4 * ONE_MB_BRW_SIZE)
109 #define DT_MAX_BRW_PAGES (DT_MAX_BRW_SIZE >> PAGE_SHIFT)
110 #define OFD_MAX_BRW_SIZE (1U << LNET_MTU_BITS)
112 /* When PAGE_SIZE is a constant, we can check our arithmetic here with cpp! */
113 #if ((PTLRPC_MAX_BRW_PAGES & (PTLRPC_MAX_BRW_PAGES - 1)) != 0)
114 # error "PTLRPC_MAX_BRW_PAGES isn't a power of two"
116 #if (PTLRPC_MAX_BRW_SIZE != (PTLRPC_MAX_BRW_PAGES * PAGE_SIZE))
117 # error "PTLRPC_MAX_BRW_SIZE isn't PTLRPC_MAX_BRW_PAGES * PAGE_SIZE"
119 #if (PTLRPC_MAX_BRW_SIZE > LNET_MTU * PTLRPC_BULK_OPS_COUNT)
120 # error "PTLRPC_MAX_BRW_SIZE too big"
122 #if (PTLRPC_MAX_BRW_PAGES > LNET_MAX_IOV * PTLRPC_BULK_OPS_COUNT)
123 # error "PTLRPC_MAX_BRW_PAGES too big"
126 #define PTLRPC_NTHRS_INIT 2
131 * Constants determine how memory is used to buffer incoming service requests.
133 * ?_NBUFS # buffers to allocate when growing the pool
134 * ?_BUFSIZE # bytes in a single request buffer
135 * ?_MAXREQSIZE # maximum request service will receive
137 * When fewer than ?_NBUFS/2 buffers are posted for receive, another chunk
138 * of ?_NBUFS is added to the pool.
140 * Messages larger than ?_MAXREQSIZE are dropped. Request buffers are
141 * considered full when less than ?_MAXREQSIZE is left in them.
146 * Constants determine how threads are created for ptlrpc service.
148 * ?_NTHRS_INIT # threads to create for each service partition on
149 * initializing. If it's non-affinity service and
150 * there is only one partition, it's the overall #
151 * threads for the service while initializing.
152 * ?_NTHRS_BASE # threads should be created at least for each
153 * ptlrpc partition to keep the service healthy.
154 * It's the low-water mark of threads upper-limit
155 * for each partition.
156 * ?_THR_FACTOR # threads can be added on threads upper-limit for
157 * each CPU core. This factor is only for reference,
158 * we might decrease value of factor if number of cores
159 * per CPT is above a limit.
160 * ?_NTHRS_MAX # overall threads can be created for a service,
161 * it's a soft limit because if service is running
162 * on machine with hundreds of cores and tens of
163 * CPU partitions, we need to guarantee each partition
164 * has ?_NTHRS_BASE threads, which means total threads
165 * will be ?_NTHRS_BASE * number_of_cpts which can
166 * exceed ?_NTHRS_MAX.
170 * #define MDS_NTHRS_INIT 2
171 * #define MDS_NTHRS_BASE 64
172 * #define MDS_NTHRS_FACTOR 8
173 * #define MDS_NTHRS_MAX 1024
176 * ---------------------------------------------------------------------
177 * Server(A) has 16 cores, user configured it to 4 partitions so each
178 * partition has 4 cores, then actual number of service threads on each
180 * MDS_NTHRS_BASE(64) + cores(4) * MDS_NTHRS_FACTOR(8) = 96
182 * Total number of threads for the service is:
183 * 96 * partitions(4) = 384
186 * ---------------------------------------------------------------------
187 * Server(B) has 32 cores, user configured it to 4 partitions so each
188 * partition has 8 cores, then actual number of service threads on each
190 * MDS_NTHRS_BASE(64) + cores(8) * MDS_NTHRS_FACTOR(8) = 128
192 * Total number of threads for the service is:
193 * 128 * partitions(4) = 512
196 * ---------------------------------------------------------------------
197 * Server(B) has 96 cores, user configured it to 8 partitions so each
198 * partition has 12 cores, then actual number of service threads on each
200 * MDS_NTHRS_BASE(64) + cores(12) * MDS_NTHRS_FACTOR(8) = 160
202 * Total number of threads for the service is:
203 * 160 * partitions(8) = 1280
205 * However, it's above the soft limit MDS_NTHRS_MAX, so we choose this number
206 * as upper limit of threads number for each partition:
207 * MDS_NTHRS_MAX(1024) / partitions(8) = 128
210 * ---------------------------------------------------------------------
211 * Server(C) have a thousand of cores and user configured it to 32 partitions
212 * MDS_NTHRS_BASE(64) * 32 = 2048
214 * which is already above soft limit MDS_NTHRS_MAX(1024), but we still need
215 * to guarantee that each partition has at least MDS_NTHRS_BASE(64) threads
216 * to keep service healthy, so total number of threads will just be 2048.
218 * NB: we don't suggest to choose server with that many cores because backend
219 * filesystem itself, buffer cache, or underlying network stack might
220 * have some SMP scalability issues at that large scale.
222 * If user already has a fat machine with hundreds or thousands of cores,
223 * there are two choices for configuration:
224 * a) create CPU table from subset of all CPUs and run Lustre on
226 * b) bind service threads on a few partitions, see modparameters of
227 * MDS and OSS for details
229 * NB: these calculations (and examples below) are simplified to help
230 * understanding, the real implementation is a little more complex,
231 * please see ptlrpc_server_nthreads_check() for details.
236 * LDLM threads constants:
238 * Given 8 as factor and 24 as base threads number
241 * On 4-core machine we will have 24 + 8 * 4 = 56 threads.
244 * On 8-core machine with 2 partitions we will have 24 + 4 * 8 = 56
245 * threads for each partition and total threads number will be 112.
248 * On 64-core machine with 8 partitions we will need LDLM_NTHRS_BASE(24)
249 * threads for each partition to keep service healthy, so total threads
250 * number should be 24 * 8 = 192.
252 * So with these constants, threads number will be at the similar level
253 * of old versions, unless target machine has over a hundred cores
255 #define LDLM_THR_FACTOR 8
256 #define LDLM_NTHRS_INIT PTLRPC_NTHRS_INIT
257 #define LDLM_NTHRS_BASE 24
258 #define LDLM_NTHRS_MAX (num_online_cpus() == 1 ? 64 : 128)
260 #define LDLM_BL_THREADS LDLM_NTHRS_AUTO_INIT
261 #define LDLM_CLIENT_NBUFS 1
262 #define LDLM_SERVER_NBUFS 64
263 #define LDLM_BUFSIZE (8 * 1024)
264 #define LDLM_MAXREQSIZE (5 * 1024)
265 #define LDLM_MAXREPSIZE (1024)
268 * MDS threads constants:
270 * Please see examples in "Thread Constants", MDS threads number will be at
271 * the comparable level of old versions, unless the server has many cores.
273 #ifndef MDS_MAX_THREADS
274 #define MDS_MAX_THREADS 1024
275 #define MDS_MAX_OTHR_THREADS 256
277 #else /* MDS_MAX_THREADS */
278 #if MDS_MAX_THREADS < PTLRPC_NTHRS_INIT
279 #undef MDS_MAX_THREADS
280 #define MDS_MAX_THREADS PTLRPC_NTHRS_INIT
282 #define MDS_MAX_OTHR_THREADS max(PTLRPC_NTHRS_INIT, MDS_MAX_THREADS / 2)
285 /* default service */
286 #define MDS_THR_FACTOR 8
287 #define MDS_NTHRS_INIT PTLRPC_NTHRS_INIT
288 #define MDS_NTHRS_MAX MDS_MAX_THREADS
289 #define MDS_NTHRS_BASE min(64, MDS_NTHRS_MAX)
291 /* read-page service */
292 #define MDS_RDPG_THR_FACTOR 4
293 #define MDS_RDPG_NTHRS_INIT PTLRPC_NTHRS_INIT
294 #define MDS_RDPG_NTHRS_MAX MDS_MAX_OTHR_THREADS
295 #define MDS_RDPG_NTHRS_BASE min(48, MDS_RDPG_NTHRS_MAX)
297 /* these should be removed when we remove setattr service in the future */
298 #define MDS_SETA_THR_FACTOR 4
299 #define MDS_SETA_NTHRS_INIT PTLRPC_NTHRS_INIT
300 #define MDS_SETA_NTHRS_MAX MDS_MAX_OTHR_THREADS
301 #define MDS_SETA_NTHRS_BASE min(48, MDS_SETA_NTHRS_MAX)
303 /* non-affinity threads */
304 #define MDS_OTHR_NTHRS_INIT PTLRPC_NTHRS_INIT
305 #define MDS_OTHR_NTHRS_MAX MDS_MAX_OTHR_THREADS
310 * Assume file name length = FNAME_MAX = 256 (true for ext3).
311 * path name length = PATH_MAX = 4096
312 * LOV MD size max = EA_MAX = 24 * 2000
313 * (NB: 24 is size of lov_ost_data)
314 * LOV LOGCOOKIE size max = 32 * 2000
315 * (NB: 32 is size of llog_cookie)
316 * symlink: FNAME_MAX + PATH_MAX <- largest
317 * link: FNAME_MAX + PATH_MAX (mds_rec_link < mds_rec_create)
318 * rename: FNAME_MAX + FNAME_MAX
319 * open: FNAME_MAX + EA_MAX
321 * MDS_MAXREQSIZE ~= 4736 bytes =
322 * lustre_msg + ldlm_request + mdt_body + mds_rec_create + FNAME_MAX + PATH_MAX
323 * MDS_MAXREPSIZE ~= 8300 bytes = lustre_msg + llog_header
325 * Realistic size is about 512 bytes (20 character name + 128 char symlink),
326 * except in the open case where there are a large number of OSTs in a LOV.
328 #define MDS_MAXREQSIZE (5 * 1024) /* >= 4736 */
329 #define MDS_MAXREPSIZE (9 * 1024) /* >= 8300 */
332 * MDS incoming request with LOV EA
333 * 24 = sizeof(struct lov_ost_data), i.e: replay of opencreate
335 #define MDS_LOV_MAXREQSIZE max(MDS_MAXREQSIZE, \
336 362 + LOV_MAX_STRIPE_COUNT * 24)
338 * MDS outgoing reply with LOV EA
340 * NB: max reply size Lustre 2.4+ client can get from old MDS is:
341 * LOV_MAX_STRIPE_COUNT * (llog_cookie + lov_ost_data) + extra bytes
343 * but 2.4 or later MDS will never send reply with llog_cookie to any
344 * version client. This macro is defined for server side reply buffer size.
346 #define MDS_LOV_MAXREPSIZE MDS_LOV_MAXREQSIZE
349 * This is the size of a maximum REINT_SETXATTR request:
351 * lustre_msg 56 (32 + 4 x 5 + 4)
353 * mdt_rec_setxattr 136
355 * name 256 (XATTR_NAME_MAX)
356 * value 65536 (XATTR_SIZE_MAX)
358 #define MDS_EA_MAXREQSIZE 66288
361 * These are the maximum request and reply sizes (rounded up to 1 KB
362 * boundaries) for the "regular" MDS_REQUEST_PORTAL and MDS_REPLY_PORTAL.
364 #define MDS_REG_MAXREQSIZE (((max(MDS_EA_MAXREQSIZE, \
365 MDS_LOV_MAXREQSIZE) + 1023) >> 10) << 10)
366 #define MDS_REG_MAXREPSIZE MDS_REG_MAXREQSIZE
369 * The update request includes all of updates from the create, which might
370 * include linkea (4K maxim), together with other updates, we set it to 1000K:
371 * lustre_msg + ptlrpc_body + OUT_UPDATE_BUFFER_SIZE_MAX
373 #define OUT_MAXREQSIZE (1000 * 1024)
374 #define OUT_MAXREPSIZE MDS_MAXREPSIZE
376 /** MDS_BUFSIZE = max_reqsize (w/o LOV EA) + max sptlrpc payload size */
377 #define MDS_BUFSIZE max(MDS_MAXREQSIZE + SPTLRPC_MAX_PAYLOAD, \
381 * MDS_REG_BUFSIZE should at least be MDS_REG_MAXREQSIZE + SPTLRPC_MAX_PAYLOAD.
382 * However, we need to allocate a much larger buffer for it because LNet
383 * requires each MD(rqbd) has at least MDS_REQ_MAXREQSIZE bytes left to avoid
384 * dropping of maximum-sized incoming request. So if MDS_REG_BUFSIZE is only a
385 * little larger than MDS_REG_MAXREQSIZE, then it can only fit in one request
386 * even there are about MDS_REG_MAX_REQSIZE bytes left in a rqbd, and memory
387 * utilization is very low.
389 * In the meanwhile, size of rqbd can't be too large, because rqbd can't be
390 * reused until all requests fit in it have been processed and released,
391 * which means one long blocked request can prevent the rqbd be reused.
392 * Now we set request buffer size to 160 KB, so even each rqbd is unlinked
393 * from LNet with unused 65 KB, buffer utilization will be about 59%.
394 * Please check LU-2432 for details.
396 #define MDS_REG_BUFSIZE max(MDS_REG_MAXREQSIZE + SPTLRPC_MAX_PAYLOAD, \
400 * OUT_BUFSIZE = max_out_reqsize + max sptlrpc payload (~1K) which is
401 * about 10K, for the same reason as MDS_REG_BUFSIZE, we also give some
402 * extra bytes to each request buffer to improve buffer utilization rate.
404 #define OUT_BUFSIZE max(OUT_MAXREQSIZE + SPTLRPC_MAX_PAYLOAD, \
407 /** FLD_MAXREQSIZE == lustre_msg + __u32 padding + ptlrpc_body + opc */
408 #define FLD_MAXREQSIZE (160)
410 /** FLD_MAXREPSIZE == lustre_msg + ptlrpc_body */
411 #define FLD_MAXREPSIZE (152)
412 #define FLD_BUFSIZE (1 << 12)
415 * SEQ_MAXREQSIZE == lustre_msg + __u32 padding + ptlrpc_body + opc + lu_range +
417 #define SEQ_MAXREQSIZE (160)
419 /** SEQ_MAXREPSIZE == lustre_msg + ptlrpc_body + lu_range */
420 #define SEQ_MAXREPSIZE (152)
421 #define SEQ_BUFSIZE (1 << 12)
423 /** MGS threads must be >= 3, see bug 22458 comment #28 */
424 #define MGS_NTHRS_INIT (PTLRPC_NTHRS_INIT + 1)
425 #define MGS_NTHRS_MAX 32
428 #define MGS_BUFSIZE (8 * 1024)
429 #define MGS_MAXREQSIZE (7 * 1024)
430 #define MGS_MAXREPSIZE (9 * 1024)
433 * OSS threads constants:
435 * Given 8 as factor and 64 as base threads number
438 * On 8-core server configured to 2 partitions, we will have
439 * 64 + 8 * 4 = 96 threads for each partition, 192 total threads.
442 * On 32-core machine configured to 4 partitions, we will have
443 * 64 + 8 * 8 = 112 threads for each partition, so total threads number
444 * will be 112 * 4 = 448.
447 * On 64-core machine configured to 4 partitions, we will have
448 * 64 + 16 * 8 = 192 threads for each partition, so total threads number
449 * will be 192 * 4 = 768 which is above limit OSS_NTHRS_MAX(512), so we
450 * cut off the value to OSS_NTHRS_MAX(512) / 4 which is 128 threads
451 * for each partition.
453 * So we can see that with these constants, threads number wil be at the
454 * similar level of old versions, unless the server has many cores.
456 /* depress threads factor for VM with small memory size */
457 #define OSS_THR_FACTOR min_t(int, 8, \
458 NUM_CACHEPAGES >> (28 - PAGE_SHIFT))
459 #define OSS_NTHRS_INIT (PTLRPC_NTHRS_INIT + 1)
460 #define OSS_NTHRS_BASE 64
462 /* threads for handling "create" request */
463 #define OSS_CR_THR_FACTOR 1
464 #define OSS_CR_NTHRS_INIT PTLRPC_NTHRS_INIT
465 #define OSS_CR_NTHRS_BASE 8
466 #define OSS_CR_NTHRS_MAX 64
469 * OST_IO_MAXREQSIZE ~=
470 * lustre_msg + ptlrpc_body + obdo + obd_ioobj +
471 * DT_MAX_BRW_PAGES * niobuf_remote
473 * - single object with 16 pages is 512 bytes
474 * - OST_IO_MAXREQSIZE must be at least 1 niobuf per page of data
475 * - Must be a multiple of 1024
476 * - should allow a reasonably large SHORT_IO_BYTES size (64KB)
478 #define _OST_MAXREQSIZE_BASE ((unsigned long)(sizeof(struct lustre_msg) + \
479 /* lm_buflens */ sizeof(__u32) * 4 + \
480 sizeof(struct ptlrpc_body) + \
481 sizeof(struct obdo) + \
482 sizeof(struct obd_ioobj) + \
483 sizeof(struct niobuf_remote)))
484 #define _OST_MAXREQSIZE_SUM ((unsigned long)(_OST_MAXREQSIZE_BASE + \
485 sizeof(struct niobuf_remote) * \
488 * FIEMAP request can be 4K+ for now
490 #define OST_MAXREQSIZE (16UL * 1024UL)
491 #define OST_IO_MAXREQSIZE max(OST_MAXREQSIZE, \
492 ((_OST_MAXREQSIZE_SUM - 1) | \
494 /* Safe estimate of free space in standard RPC, provides upper limit for # of
495 * bytes of i/o to pack in RPC (skipping bulk transfer). */
496 #define OST_MAX_SHORT_IO_BYTES ((OST_IO_MAXREQSIZE - _OST_MAXREQSIZE_BASE) & \
499 /* Actual size used for short i/o buffer. Calculation means this:
500 * At least one page (for large PAGE_SIZE), or 16 KiB, but not more
501 * than the available space aligned to a page boundary. */
502 #define OBD_DEF_SHORT_IO_BYTES min(max(PAGE_SIZE, 16UL * 1024UL), \
503 OST_MAX_SHORT_IO_BYTES)
505 #define OST_MAXREPSIZE (9 * 1024)
506 #define OST_IO_MAXREPSIZE OST_MAXREPSIZE
509 /** OST_BUFSIZE = max_reqsize + max sptlrpc payload size */
510 #define OST_BUFSIZE max_t(int, OST_MAXREQSIZE + 1024, 32 * 1024)
512 * OST_IO_MAXREQSIZE is 18K, giving extra 46K can increase buffer utilization
513 * rate of request buffer, please check comment of MDS_LOV_BUFSIZE for details.
515 #define OST_IO_BUFSIZE max_t(int, OST_IO_MAXREQSIZE + 1024, 64 * 1024)
517 /* Macro to hide a typecast and BUILD_BUG. */
518 #define ptlrpc_req_async_args(_var, req) ({ \
519 BUILD_BUG_ON(sizeof(*_var) > sizeof(req->rq_async_args)); \
520 (typeof(_var))&req->rq_async_args; \
523 struct ptlrpc_replay_async_args {
529 * Structure to single define portal connection.
531 struct ptlrpc_connection {
532 /** linkage for connections hash table */
533 struct rhash_head c_hash;
534 /** Our own lnet nid for this connection */
536 /** Remote side nid for this connection */
537 struct lnet_process_id c_peer;
538 /** UUID of the other side */
539 struct obd_uuid c_remote_uuid;
540 /** reference counter for this connection */
544 /** Client definition for PortalRPC */
545 struct ptlrpc_client {
546 /** What lnet portal does this client send messages to by default */
547 __u32 cli_request_portal;
548 /** What portal do we expect replies on */
549 __u32 cli_reply_portal;
550 /** Name of the client */
551 const char *cli_name;
554 /** state flags of requests */
555 /* XXX only ones left are those used by the bulk descs as well! */
556 #define PTL_RPC_FL_INTR BIT(0) /* reply wait was interrupted by user */
557 #define PTL_RPC_FL_TIMEOUT BIT(7) /* request timed out waiting for reply */
559 #define REQ_MAX_ACK_LOCKS 8
561 union ptlrpc_async_args {
563 * Scratchpad for passing args to completion interpreter. Users
564 * cast to the struct of their choosing, and BUILD_BUG_ON that this is
565 * big enough. For _tons_ of context, OBD_ALLOC a struct and store
566 * a pointer to it here. The pointer_arg ensures this struct is at
567 * least big enough for that.
569 void *pointer_arg[11];
573 struct ptlrpc_request_set;
574 typedef int (*set_producer_func)(struct ptlrpc_request_set *, void *);
577 * Definition of request set structure.
578 * Request set is a list of requests (not necessary to the same target) that
579 * once populated with RPCs could be sent in parallel.
580 * There are two kinds of request sets. General purpose and with dedicated
581 * serving thread. Example of the latter is ptlrpcd set.
582 * For general purpose sets once request set started sending it is impossible
583 * to add new requests to such set.
584 * Provides a way to call "completion callbacks" when all requests in the set
587 struct ptlrpc_request_set {
588 atomic_t set_refcount;
589 /** number of in queue requests */
590 atomic_t set_new_count;
591 /** number of uncompleted requests */
592 atomic_t set_remaining;
593 /** wait queue to wait on for request events */
594 wait_queue_head_t set_waitq;
595 /** List of requests in the set */
596 struct list_head set_requests;
598 * Lock for \a set_new_requests manipulations
599 * locked so that any old caller can communicate requests to
600 * the set holder who can then fold them into the lock-free set
602 spinlock_t set_new_req_lock;
603 /** List of new yet unsent requests. Only used with ptlrpcd now. */
604 struct list_head set_new_requests;
606 /** rq_status of requests that have been freed already */
608 /** Additional fields used by the flow control extension */
609 /** Maximum number of RPCs in flight */
610 int set_max_inflight;
611 /** Callback function used to generate RPCs */
612 set_producer_func set_producer;
613 /** opaq argument passed to the producer callback */
614 void *set_producer_arg;
615 unsigned int set_allow_intr:1;
618 struct ptlrpc_bulk_desc;
619 struct ptlrpc_service_part;
620 struct ptlrpc_service;
623 * ptlrpc callback & work item stuff
625 struct ptlrpc_cb_id {
626 void (*cbid_fn)(struct lnet_event *ev); /* specific callback fn */
627 void *cbid_arg; /* additional arg */
630 /** Maximum number of locks to fit into reply state */
631 #define RS_MAX_LOCKS 8
635 * Structure to define reply state on the server
636 * Reply state holds various reply message information. Also for "difficult"
637 * replies (rep-ack case) we store the state after sending reply and wait
638 * for the client to acknowledge the reception. In these cases locks could be
639 * added to the state for replay/failover consistency guarantees.
641 struct ptlrpc_reply_state {
642 /** Callback description */
643 struct ptlrpc_cb_id rs_cb_id;
644 /** Linkage for list of all reply states in a system */
645 struct list_head rs_list;
646 /** Linkage for list of all reply states on same export */
647 struct list_head rs_exp_list;
648 /** Linkage for list of all reply states for same obd */
649 struct list_head rs_obd_list;
651 struct list_head rs_debug_list;
653 /** A spinlock to protect the reply state flags */
655 /** Reply state flags */
656 unsigned long rs_difficult:1; /* ACK/commit stuff */
657 unsigned long rs_no_ack:1; /* no ACK, even for
658 difficult requests */
659 unsigned long rs_scheduled:1; /* being handled? */
660 unsigned long rs_scheduled_ever:1;/* any schedule attempts? */
661 unsigned long rs_handled:1; /* been handled yet? */
662 unsigned long rs_on_net:1; /* reply_out_callback pending? */
663 unsigned long rs_prealloc:1; /* rs from prealloc list */
664 unsigned long rs_committed:1;/* the transaction was committed
665 and the rs was dispatched
666 by ptlrpc_commit_replies */
667 unsigned long rs_convert_lock:1; /* need to convert saved
668 * locks to COS mode */
669 atomic_t rs_refcount; /* number of users */
670 /** Number of locks awaiting client ACK */
673 /** Size of the state */
677 /** Transaction number */
681 struct obd_export *rs_export;
682 struct ptlrpc_service_part *rs_svcpt;
683 /** Lnet metadata handle for the reply */
684 struct lnet_handle_md rs_md_h;
686 /** Context for the sevice thread */
687 struct ptlrpc_svc_ctx *rs_svc_ctx;
688 /** Reply buffer (actually sent to the client), encoded if needed */
689 struct lustre_msg *rs_repbuf; /* wrapper */
690 /** Size of the reply buffer */
691 int rs_repbuf_len; /* wrapper buf length */
692 /** Size of the reply message */
693 int rs_repdata_len; /* wrapper msg length */
695 * Actual reply message. Its content is encrupted (if needed) to
696 * produce reply buffer for actual sending. In simple case
697 * of no network encryption we jus set \a rs_repbuf to \a rs_msg
699 struct lustre_msg *rs_msg; /* reply message */
701 /** Handles of locks awaiting client reply ACK */
702 struct lustre_handle rs_locks[RS_MAX_LOCKS];
703 /** Lock modes of locks in \a rs_locks */
704 enum ldlm_mode rs_modes[RS_MAX_LOCKS];
707 struct ptlrpc_thread;
711 RQ_PHASE_NEW = 0xebc0de00,
712 RQ_PHASE_RPC = 0xebc0de01,
713 RQ_PHASE_BULK = 0xebc0de02,
714 RQ_PHASE_INTERPRET = 0xebc0de03,
715 RQ_PHASE_COMPLETE = 0xebc0de04,
716 RQ_PHASE_UNREG_RPC = 0xebc0de05,
717 RQ_PHASE_UNREG_BULK = 0xebc0de06,
718 RQ_PHASE_UNDEFINED = 0xebc0de07
721 /** Type of request interpreter call-back */
722 typedef int (*ptlrpc_interpterer_t)(const struct lu_env *env,
723 struct ptlrpc_request *req,
725 /** Type of request resend call-back */
726 typedef void (*ptlrpc_resend_cb_t)(struct ptlrpc_request *req,
730 * Definition of request pool structure.
731 * The pool is used to store empty preallocated requests for the case
732 * when we would actually need to send something without performing
733 * any allocations (to avoid e.g. OOM).
735 struct ptlrpc_request_pool {
736 /** Locks the list */
738 /** list of ptlrpc_request structs */
739 struct list_head prp_req_list;
740 /** Maximum message size that would fit into a rquest from this pool */
742 /** Function to allocate more requests for this pool */
743 int (*prp_populate)(struct ptlrpc_request_pool *, int);
751 #include <lustre_nrs.h>
754 * Basic request prioritization operations structure.
755 * The whole idea is centered around locks and RPCs that might affect locks.
756 * When a lock is contended we try to give priority to RPCs that might lead
757 * to fastest release of that lock.
758 * Currently only implemented for OSTs only in a way that makes all
759 * IO and truncate RPCs that are coming from a locked region where a lock is
760 * contended a priority over other requests.
762 struct ptlrpc_hpreq_ops {
764 * Check if the lock handle of the given lock is the same as
765 * taken from the request.
767 int (*hpreq_lock_match)(struct ptlrpc_request *, struct ldlm_lock *);
769 * Check if the request is a high priority one.
771 int (*hpreq_check)(struct ptlrpc_request *);
773 * Called after the request has been handled.
775 void (*hpreq_fini)(struct ptlrpc_request *);
778 struct ptlrpc_cli_req {
779 /** For bulk requests on client only: bulk descriptor */
780 struct ptlrpc_bulk_desc *cr_bulk;
781 /** optional time limit for send attempts. This is a timeout
782 * not a timestamp so timeout_t (s32) is used instead of time64_t
784 timeout_t cr_delay_limit;
785 /** time request was first queued */
786 time64_t cr_queued_time;
787 /** request sent in nanoseconds */
789 /** time for request really sent out */
790 time64_t cr_sent_out;
791 /** when req reply unlink must finish. */
792 time64_t cr_reply_deadline;
793 /** when req bulk unlink must finish. */
794 time64_t cr_bulk_deadline;
795 /** when req unlink must finish. */
796 time64_t cr_req_deadline;
797 /** Portal to which this request would be sent */
799 /** Portal where to wait for reply and where reply would be sent */
801 /** request resending number */
802 unsigned int cr_resend_nr;
803 /** What was import generation when this request was sent */
805 enum lustre_imp_state cr_send_state;
806 /** Per-request waitq introduced by bug 21938 for recovery waiting */
807 wait_queue_head_t cr_set_waitq;
808 /** Link item for request set lists */
809 struct list_head cr_set_chain;
810 /** link to waited ctx */
811 struct list_head cr_ctx_chain;
813 /** client's half ctx */
814 struct ptlrpc_cli_ctx *cr_cli_ctx;
815 /** Link back to the request set */
816 struct ptlrpc_request_set *cr_set;
817 /** outgoing request MD handle */
818 struct lnet_handle_md cr_req_md_h;
819 /** request-out callback parameter */
820 struct ptlrpc_cb_id cr_req_cbid;
821 /** incoming reply MD handle */
822 struct lnet_handle_md cr_reply_md_h;
823 wait_queue_head_t cr_reply_waitq;
824 /** reply callback parameter */
825 struct ptlrpc_cb_id cr_reply_cbid;
826 /** Async completion handler, called when reply is received */
827 ptlrpc_interpterer_t cr_reply_interp;
828 /** Resend handler, called when request is resend to update RPC data */
829 ptlrpc_resend_cb_t cr_resend_cb;
830 /** Async completion context */
831 union ptlrpc_async_args cr_async_args;
832 /** Opaq data for replay and commit callbacks. */
834 /** Link to the imp->imp_unreplied_list */
835 struct list_head cr_unreplied_list;
837 * Commit callback, called when request is committed and about to be
840 void (*cr_commit_cb)(struct ptlrpc_request *);
841 /** Replay callback, called after request is replayed at recovery */
842 void (*cr_replay_cb)(struct ptlrpc_request *);
845 /** client request member alias */
846 /* NB: these alias should NOT be used by any new code, instead they should
847 * be removed step by step to avoid potential abuse */
848 #define rq_bulk rq_cli.cr_bulk
849 #define rq_delay_limit rq_cli.cr_delay_limit
850 #define rq_queued_time rq_cli.cr_queued_time
851 #define rq_sent_ns rq_cli.cr_sent_ns
852 #define rq_real_sent rq_cli.cr_sent_out
853 #define rq_reply_deadline rq_cli.cr_reply_deadline
854 #define rq_bulk_deadline rq_cli.cr_bulk_deadline
855 #define rq_req_deadline rq_cli.cr_req_deadline
856 #define rq_nr_resend rq_cli.cr_resend_nr
857 #define rq_request_portal rq_cli.cr_req_ptl
858 #define rq_reply_portal rq_cli.cr_rep_ptl
859 #define rq_import_generation rq_cli.cr_imp_gen
860 #define rq_send_state rq_cli.cr_send_state
861 #define rq_set_chain rq_cli.cr_set_chain
862 #define rq_ctx_chain rq_cli.cr_ctx_chain
863 #define rq_set rq_cli.cr_set
864 #define rq_set_waitq rq_cli.cr_set_waitq
865 #define rq_cli_ctx rq_cli.cr_cli_ctx
866 #define rq_req_md_h rq_cli.cr_req_md_h
867 #define rq_req_cbid rq_cli.cr_req_cbid
868 #define rq_reply_md_h rq_cli.cr_reply_md_h
869 #define rq_reply_waitq rq_cli.cr_reply_waitq
870 #define rq_reply_cbid rq_cli.cr_reply_cbid
871 #define rq_interpret_reply rq_cli.cr_reply_interp
872 #define rq_resend_cb rq_cli.cr_resend_cb
873 #define rq_async_args rq_cli.cr_async_args
874 #define rq_cb_data rq_cli.cr_cb_data
875 #define rq_unreplied_list rq_cli.cr_unreplied_list
876 #define rq_commit_cb rq_cli.cr_commit_cb
877 #define rq_replay_cb rq_cli.cr_replay_cb
879 struct ptlrpc_srv_req {
880 /** initial thread servicing this request */
881 struct ptlrpc_thread *sr_svc_thread;
883 * Server side list of incoming unserved requests sorted by arrival
884 * time. Traversed from time to time to notice about to expire
885 * requests and sent back "early replies" to clients to let them
886 * know server is alive and well, just very busy to service their
889 struct list_head sr_timed_list;
890 /** server-side per-export list */
891 struct list_head sr_exp_list;
892 /** server-side history, used for debuging purposes. */
893 struct list_head sr_hist_list;
894 /** history sequence # */
896 /** the index of service's srv_at_array into which request is linked */
900 /** authed uid mapped to */
901 uid_t sr_auth_mapped_uid;
902 /** RPC is generated from what part of Lustre */
903 enum lustre_sec_part sr_sp_from;
904 /** request session context */
905 struct lu_context sr_ses;
909 /** stub for NRS request */
910 struct ptlrpc_nrs_request sr_nrq;
912 /** request arrival time */
913 struct timespec64 sr_arrival_time;
914 /** server's half ctx */
915 struct ptlrpc_svc_ctx *sr_svc_ctx;
916 /** (server side), pointed directly into req buffer */
917 struct ptlrpc_user_desc *sr_user_desc;
918 /** separated reply state, may be vmalloc'd */
919 struct ptlrpc_reply_state *sr_reply_state;
920 /** server-side hp handlers */
921 struct ptlrpc_hpreq_ops *sr_ops;
922 /** incoming request buffer */
923 struct ptlrpc_request_buffer_desc *sr_rqbd;
926 /** server request member alias */
927 /* NB: these alias should NOT be used by any new code, instead they should
928 * be removed step by step to avoid potential abuse */
929 #define rq_svc_thread rq_srv.sr_svc_thread
930 #define rq_timed_list rq_srv.sr_timed_list
931 #define rq_exp_list rq_srv.sr_exp_list
932 #define rq_history_list rq_srv.sr_hist_list
933 #define rq_history_seq rq_srv.sr_hist_seq
934 #define rq_at_index rq_srv.sr_at_index
935 #define rq_auth_uid rq_srv.sr_auth_uid
936 #define rq_auth_mapped_uid rq_srv.sr_auth_mapped_uid
937 #define rq_sp_from rq_srv.sr_sp_from
938 #define rq_session rq_srv.sr_ses
939 #define rq_nrq rq_srv.sr_nrq
940 #define rq_arrival_time rq_srv.sr_arrival_time
941 #define rq_reply_state rq_srv.sr_reply_state
942 #define rq_svc_ctx rq_srv.sr_svc_ctx
943 #define rq_user_desc rq_srv.sr_user_desc
944 #define rq_ops rq_srv.sr_ops
945 #define rq_rqbd rq_srv.sr_rqbd
946 #define rq_reqmsg rq_pill.rc_reqmsg
947 #define rq_repmsg rq_pill.rc_repmsg
948 #define rq_req_swab_mask rq_pill.rc_req_swab_mask
949 #define rq_rep_swab_mask rq_pill.rc_rep_swab_mask
952 * Represents remote procedure call.
954 * This is a staple structure used by everybody wanting to send a request
957 struct ptlrpc_request {
958 /* Request type: one of PTL_RPC_MSG_* */
960 /** Result of request processing */
963 * Linkage item through which this request is included into
964 * sending/delayed lists on client and into rqbd list on server
966 struct list_head rq_list;
967 /** Lock to protect request flags and some other important bits, like
971 spinlock_t rq_early_free_lock;
972 /** client-side flags are serialized by rq_lock @{ */
973 unsigned int rq_intr:1, rq_replied:1, rq_err:1,
974 rq_timedout:1, rq_resend:1, rq_restart:1,
976 * when ->rq_replay is set, request is kept by the client even
977 * after server commits corresponding transaction. This is
978 * used for operations that require sequence of multiple
979 * requests to be replayed. The only example currently is file
980 * open/close. When last request in such a sequence is
981 * committed, ->rq_replay is cleared on all requests in the
985 rq_no_resend:1, rq_waiting:1, rq_receiving_reply:1,
986 rq_no_delay:1, rq_net_err:1, rq_wait_ctx:1,
988 rq_req_unlinked:1, /* unlinked request buffer from lnet */
989 rq_reply_unlinked:1, /* unlinked reply buffer from lnet */
990 rq_memalloc:1, /* req originated from "kswapd" */
992 rq_reply_truncated:1,
993 /** whether the "rq_set" is a valid one */
996 /** do not resend request on -EINPROGRESS */
997 rq_no_retry_einprogress:1,
998 /* allow the req to be sent if the import is in recovery
1001 /* bulk request, sent to server, but uncommitted */
1003 rq_early_free_repbuf:1, /* free reply buffer in advance */
1007 /** server-side flags @{ */
1009 rq_hp:1, /**< high priority RPC */
1010 rq_at_linked:1, /**< link into service's srv_at_array */
1011 rq_packed_final:1, /**< packed final reply */
1012 rq_obsolete:1; /* aborted by a signal on a client */
1015 /** one of RQ_PHASE_* */
1016 enum rq_phase rq_phase;
1017 /** one of RQ_PHASE_* to be used next */
1018 enum rq_phase rq_next_phase;
1020 * client-side refcount for SENT race, server-side refcounf
1021 * for multiple replies
1023 atomic_t rq_refcount;
1026 * !rq_truncate : # reply bytes actually received,
1027 * rq_truncate : required repbuf_len for resend
1029 int rq_nob_received;
1030 /** Request length */
1034 /** Pool if request is from preallocated list */
1035 struct ptlrpc_request_pool *rq_pool;
1036 /** Transaction number */
1040 /** bulk match bits */
1042 /** reply match bits */
1045 * List item to for replay list. Not yet committed requests get linked
1047 * Also see \a rq_replay comment above.
1048 * It's also link chain on obd_export::exp_req_replay_queue
1050 struct list_head rq_replay_list;
1051 /** non-shared members for client & server request*/
1053 struct ptlrpc_cli_req rq_cli;
1054 struct ptlrpc_srv_req rq_srv;
1057 * security and encryption data
1059 /** description of flavors for client & server */
1060 struct sptlrpc_flavor rq_flvr;
1063 * SELinux policy info at the time of the request
1064 * sepol string format is:
1065 * <mode>:<policy name>:<policy version>:<policy hash>
1067 char rq_sepol[LUSTRE_NODEMAP_SEPOL_LENGTH + 1];
1069 /* client/server security flags */
1071 rq_ctx_init:1, /* context initiation */
1072 rq_ctx_fini:1, /* context destroy */
1073 rq_bulk_read:1, /* request bulk read */
1074 rq_bulk_write:1, /* request bulk write */
1075 /* server authentication flags */
1076 rq_auth_gss:1, /* authenticated by gss */
1077 rq_auth_usr_root:1, /* authed as root */
1078 rq_auth_usr_mdt:1, /* authed as mdt */
1079 rq_auth_usr_ost:1, /* authed as ost */
1080 /* security tfm flags */
1083 /* doesn't expect reply FIXME */
1085 rq_pill_init:1, /* pill initialized */
1086 rq_srv_req:1; /* server request */
1089 /** various buffer pointers */
1090 struct lustre_msg *rq_reqbuf; /**< req wrapper, vmalloc*/
1091 char *rq_repbuf; /**< rep buffer, vmalloc */
1092 struct lustre_msg *rq_repdata; /**< rep wrapper msg */
1093 /** only in priv mode */
1094 struct lustre_msg *rq_clrbuf;
1095 int rq_reqbuf_len; /* req wrapper buf len */
1096 int rq_reqdata_len; /* req wrapper msg len */
1097 int rq_repbuf_len; /* rep buffer len */
1098 int rq_repdata_len; /* rep wrapper msg len */
1099 int rq_clrbuf_len; /* only in priv mode */
1100 int rq_clrdata_len; /* only in priv mode */
1102 /** early replies go to offset 0, regular replies go after that */
1103 unsigned int rq_reply_off;
1106 /** how many early replies (for stats) */
1108 /** Server-side, export on which request was received */
1109 struct obd_export *rq_export;
1110 /** import where request is being sent */
1111 struct obd_import *rq_import;
1114 /** Peer description (the other side) */
1115 struct lnet_process_id rq_peer;
1116 /** Descriptor for the NID from which the peer sent the request. */
1117 struct lnet_process_id rq_source;
1119 * service time estimate (secs)
1120 * If the request is not served by this time, it is marked as timed out.
1121 * Do not change to time64_t since this is transmitted over the wire.
1123 * The linux kernel handles timestamps with time64_t and timeouts
1124 * are normally done with jiffies. Lustre shares the rq_timeout between
1125 * nodes. Since jiffies can vary from node to node Lustre instead
1126 * will express the timeout value in seconds. To avoid confusion with
1127 * timestamps (time64_t) and jiffy timeouts (long) Lustre timeouts
1128 * are expressed in s32 (timeout_t). Also what is transmitted over
1129 * the wire is 32 bits.
1131 timeout_t rq_timeout;
1133 * when request/reply sent (secs), or time when request should be sent
1136 /** when request must finish. */
1137 time64_t rq_deadline;
1138 /** request format description */
1139 struct req_capsule rq_pill;
1143 * Call completion handler for rpc if any, return it's status or original
1144 * rc if there was no handler defined for this request.
1146 static inline int ptlrpc_req_interpret(const struct lu_env *env,
1147 struct ptlrpc_request *req, int rc)
1149 if (req->rq_interpret_reply != NULL) {
1150 req->rq_status = req->rq_interpret_reply(env, req,
1151 &req->rq_async_args,
1153 return req->rq_status;
1162 void ptlrpc_nrs_req_hp_move(struct ptlrpc_request *req);
1165 * Can the request be moved from the regular NRS head to the high-priority NRS
1166 * head (of the same PTLRPC service partition), if any?
1168 * For a reliable result, this should be checked under svcpt->scp_req lock.
1170 static inline bool ptlrpc_nrs_req_can_move(struct ptlrpc_request *req)
1172 struct ptlrpc_nrs_request *nrq = &req->rq_nrq;
1175 * LU-898: Check ptlrpc_nrs_request::nr_enqueued to make sure the
1176 * request has been enqueued first, and ptlrpc_nrs_request::nr_started
1177 * to make sure it has not been scheduled yet (analogous to previous
1178 * (non-NRS) checking of !list_empty(&ptlrpc_request::rq_list).
1180 return nrq->nr_enqueued && !nrq->nr_started && !req->rq_hp;
1185 * Convert numerical request phase value \a phase into text string description
1187 static inline const char *
1188 ptlrpc_phase2str(enum rq_phase phase)
1197 case RQ_PHASE_INTERPRET:
1199 case RQ_PHASE_COMPLETE:
1201 case RQ_PHASE_UNREG_RPC:
1203 case RQ_PHASE_UNREG_BULK:
1211 * Convert numerical request phase of the request \a req into text stringi
1214 static inline const char *
1215 ptlrpc_rqphase2str(struct ptlrpc_request *req)
1217 return ptlrpc_phase2str(req->rq_phase);
1221 * Debugging functions and helpers to print request structure into debug log
1224 /* Spare the preprocessor, spoil the bugs. */
1225 #define FLAG(field, str) (field ? str : "")
1227 /** Convert bit flags into a string */
1228 #define DEBUG_REQ_FLAGS(req) \
1229 ptlrpc_rqphase2str(req), \
1230 FLAG(req->rq_intr, "I"), FLAG(req->rq_replied, "R"), \
1231 FLAG(req->rq_err, "E"), FLAG(req->rq_net_err, "e"), \
1232 FLAG(req->rq_timedout, "X") /* eXpired */, FLAG(req->rq_resend, "S"), \
1233 FLAG(req->rq_restart, "T"), FLAG(req->rq_replay, "P"), \
1234 FLAG(req->rq_no_resend, "N"), FLAG(req->rq_no_reply, "n"), \
1235 FLAG(req->rq_waiting, "W"), \
1236 FLAG(req->rq_wait_ctx, "C"), FLAG(req->rq_hp, "H"), \
1237 FLAG(req->rq_committed, "M"), \
1238 FLAG(req->rq_req_unlinked, "Q"), \
1239 FLAG(req->rq_reply_unlinked, "U"), \
1240 FLAG(req->rq_receiving_reply, "r")
1242 #define REQ_FLAGS_FMT "%s:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
1244 void _debug_req(struct ptlrpc_request *req,
1245 struct libcfs_debug_msg_data *data, const char *fmt, ...)
1246 __attribute__ ((format (printf, 3, 4)));
1249 * Helper that decides if we need to print request accordig to current debug
1252 #define debug_req(msgdata, mask, cdls, req, fmt, a...) \
1254 CFS_CHECK_STACK(msgdata, mask, cdls); \
1256 if (((mask) & D_CANTMASK) != 0 || \
1257 ((libcfs_debug & (mask)) != 0 && \
1258 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
1259 _debug_req((req), msgdata, fmt, ##a); \
1263 * This is the debug print function you need to use to print request sturucture
1264 * content into lustre debug log.
1265 * for most callers (level is a constant) this is resolved at compile time */
1266 #define DEBUG_REQ(level, req, fmt, args...) \
1268 if ((level) & (D_ERROR | D_WARNING)) { \
1269 static struct cfs_debug_limit_state cdls; \
1270 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, &cdls); \
1271 debug_req(&msgdata, level, &cdls, req, "@@@ "fmt" ", ## args);\
1273 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, NULL); \
1274 debug_req(&msgdata, level, NULL, req, "@@@ "fmt" ", ## args); \
1279 enum ptlrpc_bulk_op_type {
1280 PTLRPC_BULK_OP_ACTIVE = 0x00000001,
1281 PTLRPC_BULK_OP_PASSIVE = 0x00000002,
1282 PTLRPC_BULK_OP_PUT = 0x00000004,
1283 PTLRPC_BULK_OP_GET = 0x00000008,
1284 PTLRPC_BULK_GET_SOURCE = PTLRPC_BULK_OP_PASSIVE | PTLRPC_BULK_OP_GET,
1285 PTLRPC_BULK_PUT_SINK = PTLRPC_BULK_OP_PASSIVE | PTLRPC_BULK_OP_PUT,
1286 PTLRPC_BULK_GET_SINK = PTLRPC_BULK_OP_ACTIVE | PTLRPC_BULK_OP_GET,
1287 PTLRPC_BULK_PUT_SOURCE = PTLRPC_BULK_OP_ACTIVE | PTLRPC_BULK_OP_PUT,
1290 static inline bool ptlrpc_is_bulk_op_get(enum ptlrpc_bulk_op_type type)
1292 return (type & PTLRPC_BULK_OP_GET) == PTLRPC_BULK_OP_GET;
1295 static inline bool ptlrpc_is_bulk_get_source(enum ptlrpc_bulk_op_type type)
1297 return (type & PTLRPC_BULK_GET_SOURCE) == PTLRPC_BULK_GET_SOURCE;
1300 static inline bool ptlrpc_is_bulk_put_sink(enum ptlrpc_bulk_op_type type)
1302 return (type & PTLRPC_BULK_PUT_SINK) == PTLRPC_BULK_PUT_SINK;
1305 static inline bool ptlrpc_is_bulk_get_sink(enum ptlrpc_bulk_op_type type)
1307 return (type & PTLRPC_BULK_GET_SINK) == PTLRPC_BULK_GET_SINK;
1310 static inline bool ptlrpc_is_bulk_put_source(enum ptlrpc_bulk_op_type type)
1312 return (type & PTLRPC_BULK_PUT_SOURCE) == PTLRPC_BULK_PUT_SOURCE;
1315 static inline bool ptlrpc_is_bulk_op_active(enum ptlrpc_bulk_op_type type)
1317 return ((type & PTLRPC_BULK_OP_ACTIVE) |
1318 (type & PTLRPC_BULK_OP_PASSIVE))
1319 == PTLRPC_BULK_OP_ACTIVE;
1322 static inline bool ptlrpc_is_bulk_op_passive(enum ptlrpc_bulk_op_type type)
1324 return ((type & PTLRPC_BULK_OP_ACTIVE) |
1325 (type & PTLRPC_BULK_OP_PASSIVE))
1326 == PTLRPC_BULK_OP_PASSIVE;
1329 struct ptlrpc_bulk_frag_ops {
1331 * Add a page \a page to the bulk descriptor \a desc
1332 * Data to transfer in the page starts at offset \a pageoffset and
1333 * amount of data to transfer from the page is \a len
1335 void (*add_kiov_frag)(struct ptlrpc_bulk_desc *desc,
1336 struct page *page, int pageoffset, int len);
1339 * Add a \a fragment to the bulk descriptor \a desc.
1340 * Data to transfer in the fragment is pointed to by \a frag
1341 * The size of the fragment is \a len
1343 int (*add_iov_frag)(struct ptlrpc_bulk_desc *desc, void *frag, int len);
1346 * Uninitialize and free bulk descriptor \a desc.
1347 * Works on bulk descriptors both from server and client side.
1349 void (*release_frags)(struct ptlrpc_bulk_desc *desc);
1352 extern const struct ptlrpc_bulk_frag_ops ptlrpc_bulk_kiov_pin_ops;
1353 extern const struct ptlrpc_bulk_frag_ops ptlrpc_bulk_kiov_nopin_ops;
1356 * Definition of bulk descriptor.
1357 * Bulks are special "Two phase" RPCs where initial request message
1358 * is sent first and it is followed bt a transfer (o receiving) of a large
1359 * amount of data to be settled into pages referenced from the bulk descriptors.
1360 * Bulks transfers (the actual data following the small requests) are done
1361 * on separate LNet portals.
1362 * In lustre we use bulk transfers for READ and WRITE transfers from/to OSTs.
1363 * Another user is readpage for MDT.
1365 struct ptlrpc_bulk_desc {
1366 unsigned int bd_refs; /* number MD's assigned including zero-sends */
1367 /** completed with failure */
1368 unsigned long bd_failure:1;
1370 unsigned long bd_registered:1;
1371 /** For serialization with callback */
1373 /** {put,get}{source,sink}{kvec,kiov} */
1374 enum ptlrpc_bulk_op_type bd_type;
1375 /** LNet portal for this bulk */
1377 /** Server side - export this bulk created for */
1378 struct obd_export *bd_export;
1379 /** Client side - import this bulk was sent on */
1380 struct obd_import *bd_import;
1381 /** Back pointer to the request */
1382 struct ptlrpc_request *bd_req;
1383 const struct ptlrpc_bulk_frag_ops *bd_frag_ops;
1384 wait_queue_head_t bd_waitq; /* server side only WQ */
1385 int bd_iov_count; /* # entries in bd_iov */
1386 int bd_max_iov; /* allocated size of bd_iov */
1387 int bd_nob; /* # bytes covered */
1388 int bd_nob_transferred; /* # bytes GOT/PUT */
1389 unsigned int bd_nob_last; /* # bytes in last MD */
1391 __u64 bd_last_mbits;
1393 struct ptlrpc_cb_id bd_cbid; /* network callback info */
1394 lnet_nid_t bd_sender; /* stash event::sender */
1395 int bd_md_count; /* # valid entries in bd_mds */
1396 int bd_md_max_brw; /* max entries in bd_mds */
1398 /** array of offsets for each MD */
1399 unsigned int bd_mds_off[PTLRPC_BULK_OPS_COUNT];
1400 /** array of associated MDs */
1401 struct lnet_handle_md bd_mds[PTLRPC_BULK_OPS_COUNT];
1403 /* encrypted iov, size is either 0 or bd_iov_count. */
1404 struct bio_vec *bd_enc_vec;
1405 struct bio_vec *bd_vec;
1410 SVC_STOPPED = BIT(0),
1411 SVC_STOPPING = BIT(1),
1412 SVC_STARTING = BIT(2),
1413 SVC_RUNNING = BIT(3),
1416 #define PTLRPC_THR_NAME_LEN 32
1418 * Definition of server service thread structure
1420 struct ptlrpc_thread {
1422 * List of active threads in svcpt->scp_threads
1424 struct list_head t_link;
1426 * thread-private data (preallocated vmalloc'd memory)
1431 * service thread index, from ptlrpc_start_threads
1437 struct task_struct *t_task;
1441 * put watchdog in the structure per thread b=14840
1443 struct delayed_work t_watchdog;
1445 * the svc this thread belonged to b=18582
1447 struct ptlrpc_service_part *t_svcpt;
1448 wait_queue_head_t t_ctl_waitq;
1449 struct lu_env *t_env;
1450 char t_name[PTLRPC_THR_NAME_LEN];
1453 static inline int thread_is_init(struct ptlrpc_thread *thread)
1455 return thread->t_flags == 0;
1458 static inline int thread_is_stopped(struct ptlrpc_thread *thread)
1460 return !!(thread->t_flags & SVC_STOPPED);
1463 static inline int thread_is_stopping(struct ptlrpc_thread *thread)
1465 return !!(thread->t_flags & SVC_STOPPING);
1468 static inline int thread_is_starting(struct ptlrpc_thread *thread)
1470 return !!(thread->t_flags & SVC_STARTING);
1473 static inline int thread_is_running(struct ptlrpc_thread *thread)
1475 return !!(thread->t_flags & SVC_RUNNING);
1478 static inline void thread_clear_flags(struct ptlrpc_thread *thread, __u32 flags)
1480 thread->t_flags &= ~flags;
1483 static inline void thread_set_flags(struct ptlrpc_thread *thread, __u32 flags)
1485 thread->t_flags = flags;
1488 static inline void thread_add_flags(struct ptlrpc_thread *thread, __u32 flags)
1490 thread->t_flags |= flags;
1493 static inline int thread_test_and_clear_flags(struct ptlrpc_thread *thread,
1496 if (thread->t_flags & flags) {
1497 thread->t_flags &= ~flags;
1504 * Request buffer descriptor structure.
1505 * This is a structure that contains one posted request buffer for service.
1506 * Once data land into a buffer, event callback creates actual request and
1507 * notifies wakes one of the service threads to process new incoming request.
1508 * More than one request can fit into the buffer.
1510 struct ptlrpc_request_buffer_desc {
1511 /** Link item for rqbds on a service */
1512 struct list_head rqbd_list;
1513 /** History of requests for this buffer */
1514 struct list_head rqbd_reqs;
1515 /** Back pointer to service for which this buffer is registered */
1516 struct ptlrpc_service_part *rqbd_svcpt;
1517 /** LNet descriptor */
1518 struct lnet_handle_md rqbd_md_h;
1520 /** The buffer itself */
1522 struct ptlrpc_cb_id rqbd_cbid;
1524 * This "embedded" request structure is only used for the
1525 * last request to fit into the buffer
1527 struct ptlrpc_request rqbd_req;
1530 typedef int (*svc_handler_t)(struct ptlrpc_request *req);
1532 struct ptlrpc_service_ops {
1534 * if non-NULL called during thread creation (ptlrpc_start_thread())
1535 * to initialize service specific per-thread state.
1537 int (*so_thr_init)(struct ptlrpc_thread *thr);
1539 * if non-NULL called during thread shutdown (ptlrpc_main()) to
1540 * destruct state created by ->srv_init().
1542 void (*so_thr_done)(struct ptlrpc_thread *thr);
1544 * Handler function for incoming requests for this service
1546 int (*so_req_handler)(struct ptlrpc_request *req);
1548 * function to determine priority of the request, it's called
1549 * on every new request
1551 int (*so_hpreq_handler)(struct ptlrpc_request *);
1553 * service-specific print fn
1555 void (*so_req_printer)(void *, struct ptlrpc_request *);
1558 #ifndef __cfs_cacheline_aligned
1559 /* NB: put it here for reducing patche dependence */
1560 # define __cfs_cacheline_aligned
1564 * How many high priority requests to serve before serving one normal
1567 #define PTLRPC_SVC_HP_RATIO 10
1570 * Definition of PortalRPC service.
1571 * The service is listening on a particular portal (like tcp port)
1572 * and perform actions for a specific server like IO service for OST
1573 * or general metadata service for MDS.
1575 struct ptlrpc_service {
1576 /** serialize /proc operations */
1577 spinlock_t srv_lock;
1578 /** most often accessed fields */
1579 /** chain thru all services */
1580 struct list_head srv_list;
1581 /** service operations table */
1582 struct ptlrpc_service_ops srv_ops;
1583 /** only statically allocated strings here; we don't clean them */
1585 /** only statically allocated strings here; we don't clean them */
1586 char *srv_thread_name;
1587 /** threads # should be created for each partition on initializing */
1588 int srv_nthrs_cpt_init;
1589 /** limit of threads number for each partition */
1590 int srv_nthrs_cpt_limit;
1591 /** Root of debugfs dir tree for this service */
1592 struct dentry *srv_debugfs_entry;
1593 /** Pointer to statistic data for this service */
1594 struct lprocfs_stats *srv_stats;
1595 /** # hp per lp reqs to handle */
1596 int srv_hpreq_ratio;
1597 /** biggest request to receive */
1598 int srv_max_req_size;
1599 /** biggest reply to send */
1600 int srv_max_reply_size;
1601 /** size of individual buffers */
1603 /** # buffers to allocate in 1 group */
1604 int srv_nbuf_per_group;
1605 /** Local portal on which to receive requests */
1606 __u32 srv_req_portal;
1607 /** Portal on the client to send replies to */
1608 __u32 srv_rep_portal;
1610 * Tags for lu_context associated with this thread, see struct
1614 /** soft watchdog timeout multiplier */
1615 int srv_watchdog_factor;
1616 /** under unregister_service */
1617 unsigned srv_is_stopping:1;
1618 /** Whether or not to restrict service threads to CPUs in this CPT */
1619 unsigned srv_cpt_bind:1;
1621 /** max # request buffers */
1623 /** max # request buffers in history per partition */
1624 int srv_hist_nrqbds_cpt_max;
1625 /** number of CPTs this service associated with */
1627 /** CPTs array this service associated with */
1629 /** 2^srv_cptab_bits >= cfs_cpt_numbert(srv_cptable) */
1631 /** CPT table this service is running over */
1632 struct cfs_cpt_table *srv_cptable;
1635 struct kobject srv_kobj;
1636 struct completion srv_kobj_unregister;
1638 * partition data for ptlrpc service
1640 struct ptlrpc_service_part *srv_parts[0];
1644 * Definition of PortalRPC service partition data.
1645 * Although a service only has one instance of it right now, but we
1646 * will have multiple instances very soon (instance per CPT).
1648 * it has four locks:
1650 * serialize operations on rqbd and requests waiting for preprocess
1652 * serialize operations active requests sent to this portal
1654 * serialize adaptive timeout stuff
1656 * serialize operations on RS list (reply states)
1658 * We don't have any use-case to take two or more locks at the same time
1659 * for now, so there is no lock order issue.
1661 struct ptlrpc_service_part {
1662 /** back reference to owner */
1663 struct ptlrpc_service *scp_service __cfs_cacheline_aligned;
1664 /* CPT id, reserved */
1666 /** always increasing number */
1668 /** # of starting threads */
1669 int scp_nthrs_starting;
1670 /** # running threads */
1671 int scp_nthrs_running;
1672 /** service threads list */
1673 struct list_head scp_threads;
1676 * serialize the following fields, used for protecting
1677 * rqbd list and incoming requests waiting for preprocess,
1678 * threads starting & stopping are also protected by this lock.
1680 spinlock_t scp_lock __cfs_cacheline_aligned;
1681 /** userland serialization */
1682 struct mutex scp_mutex;
1683 /** total # req buffer descs allocated */
1684 int scp_nrqbds_total;
1685 /** # posted request buffers for receiving */
1686 int scp_nrqbds_posted;
1687 /** in progress of allocating rqbd */
1688 int scp_rqbd_allocating;
1689 /** # incoming reqs */
1690 int scp_nreqs_incoming;
1691 /** request buffers to be reposted */
1692 struct list_head scp_rqbd_idle;
1693 /** req buffers receiving */
1694 struct list_head scp_rqbd_posted;
1695 /** incoming reqs */
1696 struct list_head scp_req_incoming;
1697 /** timeout before re-posting reqs, in jiffies */
1698 long scp_rqbd_timeout;
1700 * all threads sleep on this. This wait-queue is signalled when new
1701 * incoming request arrives and when difficult reply has to be handled.
1703 wait_queue_head_t scp_waitq;
1705 /** request history */
1706 struct list_head scp_hist_reqs;
1707 /** request buffer history */
1708 struct list_head scp_hist_rqbds;
1709 /** # request buffers in history */
1710 int scp_hist_nrqbds;
1711 /** sequence number for request */
1713 /** highest seq culled from history */
1714 __u64 scp_hist_seq_culled;
1717 * serialize the following fields, used for processing requests
1718 * sent to this portal
1720 spinlock_t scp_req_lock __cfs_cacheline_aligned;
1721 /** # reqs in either of the NRS heads below */
1722 /** # reqs being served */
1723 int scp_nreqs_active;
1724 /** # HPreqs being served */
1725 int scp_nhreqs_active;
1726 /** # hp requests handled */
1729 /** NRS head for regular requests */
1730 struct ptlrpc_nrs scp_nrs_reg;
1731 /** NRS head for HP requests; this is only valid for services that can
1732 * handle HP requests */
1733 struct ptlrpc_nrs *scp_nrs_hp;
1738 * serialize the following fields, used for changes on
1741 spinlock_t scp_at_lock __cfs_cacheline_aligned;
1742 /** estimated rpc service time */
1743 struct adaptive_timeout scp_at_estimate;
1744 /** reqs waiting for replies */
1745 struct ptlrpc_at_array scp_at_array;
1746 /** early reply timer */
1747 struct timer_list scp_at_timer;
1749 ktime_t scp_at_checktime;
1750 /** check early replies */
1751 unsigned scp_at_check;
1755 * serialize the following fields, used for processing
1756 * replies for this portal
1758 spinlock_t scp_rep_lock __cfs_cacheline_aligned;
1759 /** all the active replies */
1760 struct list_head scp_rep_active;
1761 /** List of free reply_states */
1762 struct list_head scp_rep_idle;
1763 /** waitq to run, when adding stuff to srv_free_rs_list */
1764 wait_queue_head_t scp_rep_waitq;
1765 /** # 'difficult' replies */
1766 atomic_t scp_nreps_difficult;
1769 #define ptlrpc_service_for_each_part(part, i, svc) \
1771 i < (svc)->srv_ncpts && \
1772 (svc)->srv_parts != NULL && \
1773 ((part) = (svc)->srv_parts[i]) != NULL; i++)
1776 * Declaration of ptlrpcd control structure
1778 struct ptlrpcd_ctl {
1780 * Ptlrpc thread control flags (LIOD_START, LIOD_STOP, LIOD_FORCE)
1782 unsigned long pc_flags;
1784 * Thread lock protecting structure fields.
1790 struct completion pc_starting;
1794 struct completion pc_finishing;
1796 * Thread requests set.
1798 struct ptlrpc_request_set *pc_set;
1800 * Thread name used in kthread_run()
1804 * CPT the thread is bound on.
1808 * Index of ptlrpcd thread in the array.
1812 * Pointer to the array of partners' ptlrpcd_ctl structure.
1814 struct ptlrpcd_ctl **pc_partners;
1816 * Number of the ptlrpcd's partners.
1820 * Record the partner index to be processed next.
1824 * Error code if the thread failed to fully start.
1829 /* Bits for pc_flags */
1830 enum ptlrpcd_ctl_flags {
1832 * Ptlrpc thread start flag.
1834 LIOD_START = BIT(0),
1836 * Ptlrpc thread stop flag.
1840 * Ptlrpc thread force flag (only stop force so far).
1841 * This will cause aborting any inflight rpcs handled
1842 * by thread if LIOD_STOP is specified.
1844 LIOD_FORCE = BIT(2),
1846 * This is a recovery ptlrpc thread.
1848 LIOD_RECOVERY = BIT(3),
1855 * Service compatibility function; the policy is compatible with all services.
1857 * \param[in] svc The service the policy is attempting to register with.
1858 * \param[in] desc The policy descriptor
1860 * \retval true The policy is compatible with the service
1862 * \see ptlrpc_nrs_pol_desc::pd_compat()
1864 static inline bool nrs_policy_compat_all(const struct ptlrpc_service *svc,
1865 const struct ptlrpc_nrs_pol_desc *desc)
1871 * Service compatibility function; the policy is compatible with only a specific
1872 * service which is identified by its human-readable name at
1873 * ptlrpc_service::srv_name.
1875 * \param[in] svc The service the policy is attempting to register with.
1876 * \param[in] desc The policy descriptor
1878 * \retval false The policy is not compatible with the service
1879 * \retval true The policy is compatible with the service
1881 * \see ptlrpc_nrs_pol_desc::pd_compat()
1883 static inline bool nrs_policy_compat_one(const struct ptlrpc_service *svc,
1884 const struct ptlrpc_nrs_pol_desc *desc)
1886 LASSERT(desc->pd_compat_svc_name != NULL);
1887 return strcmp(svc->srv_name, desc->pd_compat_svc_name) == 0;
1892 /* ptlrpc/events.c */
1893 extern int ptlrpc_uuid_to_peer(struct obd_uuid *uuid,
1894 struct lnet_process_id *peer, lnet_nid_t *self);
1896 * These callbacks are invoked by LNet when something happened to
1900 extern void request_out_callback(struct lnet_event *ev);
1901 extern void reply_in_callback(struct lnet_event *ev);
1902 extern void client_bulk_callback(struct lnet_event *ev);
1903 extern void request_in_callback(struct lnet_event *ev);
1904 extern void reply_out_callback(struct lnet_event *ev);
1905 #ifdef HAVE_SERVER_SUPPORT
1906 extern void server_bulk_callback(struct lnet_event *ev);
1910 /* ptlrpc/connection.c */
1911 struct ptlrpc_connection *ptlrpc_connection_get(struct lnet_process_id peer,
1913 struct obd_uuid *uuid);
1915 static inline void ptlrpc_connection_put(struct ptlrpc_connection *conn)
1920 LASSERT(atomic_read(&conn->c_refcount) > 0);
1923 * We do not remove connection from hashtable and
1924 * do not free it even if last caller released ref,
1925 * as we want to have it cached for the case it is
1928 * Deallocating it and later creating new connection
1929 * again would be wastful. This way we also avoid
1930 * expensive locking to protect things from get/put
1931 * race when found cached connection is freed by
1932 * ptlrpc_connection_put().
1934 * It will be freed later in module unload time,
1935 * when ptlrpc_connection_fini()->lh_exit->conn_exit()
1938 atomic_dec(&conn->c_refcount);
1940 CDEBUG(D_INFO, "PUT conn=%p refcount %d to %s\n",
1941 conn, atomic_read(&conn->c_refcount),
1942 libcfs_nid2str(conn->c_peer.nid));
1945 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *);
1946 int ptlrpc_connection_init(void);
1947 void ptlrpc_connection_fini(void);
1948 extern lnet_pid_t ptl_get_pid(void);
1951 * Check if the peer connection is on the local node. We need to use GFP_NOFS
1952 * for requests from a local client to avoid recursing into the filesystem
1953 * as we might end up waiting on a page sent in the request we're serving.
1955 * Use __GFP_HIGHMEM so that the pages can use all of the available memory
1956 * on 32-bit machines. Use more aggressive GFP_HIGHUSER flags from non-local
1957 * clients to be able to generate more memory pressure on the OSS and allow
1958 * inactive pages to be reclaimed, since it doesn't have any other processes
1959 * or allocations that generate memory reclaim pressure.
1961 * See b=17576 (bdf50dc9) and b=19529 (3dcf18d3) for details.
1963 static inline bool ptlrpc_connection_is_local(struct ptlrpc_connection *conn)
1968 if (conn->c_peer.nid == conn->c_self)
1971 RETURN(LNetIsPeerLocal(conn->c_peer.nid));
1974 /* ptlrpc/niobuf.c */
1976 * Actual interfacing with LNet to put/get/register/unregister stuff
1979 #ifdef HAVE_SERVER_SUPPORT
1980 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp(struct ptlrpc_request *req,
1981 unsigned nfrags, unsigned max_brw,
1984 const struct ptlrpc_bulk_frag_ops
1986 int ptlrpc_start_bulk_transfer(struct ptlrpc_bulk_desc *desc);
1987 void ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *desc);
1989 static inline int ptlrpc_server_bulk_active(struct ptlrpc_bulk_desc *desc)
1993 LASSERT(desc != NULL);
1995 spin_lock(&desc->bd_lock);
1997 spin_unlock(&desc->bd_lock);
2002 int ptlrpc_register_bulk(struct ptlrpc_request *req);
2003 int ptlrpc_unregister_bulk(struct ptlrpc_request *req, int async);
2005 static inline int ptlrpc_client_bulk_active(struct ptlrpc_request *req)
2007 struct ptlrpc_bulk_desc *desc;
2010 LASSERT(req != NULL);
2011 desc = req->rq_bulk;
2016 if (req->rq_bulk_deadline > ktime_get_real_seconds())
2020 spin_lock(&desc->bd_lock);
2022 spin_unlock(&desc->bd_lock);
2026 #define PTLRPC_REPLY_MAYBE_DIFFICULT 0x01
2027 #define PTLRPC_REPLY_EARLY 0x02
2028 int ptlrpc_send_reply(struct ptlrpc_request *req, int flags);
2029 int ptlrpc_reply(struct ptlrpc_request *req);
2030 int ptlrpc_send_error(struct ptlrpc_request *req, int difficult);
2031 int ptlrpc_error(struct ptlrpc_request *req);
2032 int ptlrpc_at_get_net_latency(struct ptlrpc_request *req);
2033 int ptl_send_rpc(struct ptlrpc_request *request, int noreply);
2034 int ptlrpc_register_rqbd(struct ptlrpc_request_buffer_desc *rqbd);
2037 /* ptlrpc/client.c */
2039 * Client-side portals API. Everything to send requests, receive replies,
2040 * request queues, request management, etc.
2043 void ptlrpc_request_committed(struct ptlrpc_request *req, int force);
2045 void ptlrpc_init_client(int req_portal, int rep_portal, const char *name,
2046 struct ptlrpc_client *);
2047 void ptlrpc_cleanup_client(struct obd_import *imp);
2048 struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid,
2049 lnet_nid_t nid4refnet);
2051 int ptlrpc_queue_wait(struct ptlrpc_request *req);
2052 int ptlrpc_replay_req(struct ptlrpc_request *req);
2053 void ptlrpc_restart_req(struct ptlrpc_request *req);
2054 void ptlrpc_abort_inflight(struct obd_import *imp);
2055 void ptlrpc_cleanup_imp(struct obd_import *imp);
2056 void ptlrpc_abort_set(struct ptlrpc_request_set *set);
2058 struct ptlrpc_request_set *ptlrpc_prep_set(void);
2059 struct ptlrpc_request_set *ptlrpc_prep_fcset(int max, set_producer_func func,
2061 int ptlrpc_check_set(const struct lu_env *env, struct ptlrpc_request_set *set);
2062 int ptlrpc_set_wait(const struct lu_env *env, struct ptlrpc_request_set *);
2063 void ptlrpc_set_destroy(struct ptlrpc_request_set *);
2064 void ptlrpc_set_add_req(struct ptlrpc_request_set *, struct ptlrpc_request *);
2065 #define PTLRPCD_SET ((struct ptlrpc_request_set *)1)
2067 void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool);
2068 int ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq);
2070 struct ptlrpc_request_pool *
2071 ptlrpc_init_rq_pool(int, int,
2072 int (*populate_pool)(struct ptlrpc_request_pool *, int));
2074 void ptlrpc_at_set_req_timeout(struct ptlrpc_request *req);
2075 struct ptlrpc_request *ptlrpc_request_alloc(struct obd_import *imp,
2076 const struct req_format *format);
2077 struct ptlrpc_request *ptlrpc_request_alloc_pool(struct obd_import *imp,
2078 struct ptlrpc_request_pool *,
2079 const struct req_format *format);
2080 void ptlrpc_request_free(struct ptlrpc_request *request);
2081 int ptlrpc_request_pack(struct ptlrpc_request *request,
2082 __u32 version, int opcode);
2083 struct ptlrpc_request *ptlrpc_request_alloc_pack(struct obd_import *imp,
2084 const struct req_format *format,
2085 __u32 version, int opcode);
2086 int ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
2087 __u32 version, int opcode, char **bufs,
2088 struct ptlrpc_cli_ctx *ctx);
2089 void ptlrpc_req_finished(struct ptlrpc_request *request);
2090 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request);
2091 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req);
2092 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp(struct ptlrpc_request *req,
2093 unsigned nfrags, unsigned max_brw,
2096 const struct ptlrpc_bulk_frag_ops
2099 void __ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
2100 struct page *page, int pageoffset, int len,
2103 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk);
2105 static inline void ptlrpc_release_bulk_noop(struct ptlrpc_bulk_desc *desc)
2109 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
2110 struct obd_import *imp);
2111 __u64 ptlrpc_next_xid(void);
2112 __u64 ptlrpc_sample_next_xid(void);
2113 __u64 ptlrpc_req_xid(struct ptlrpc_request *request);
2114 void ptlrpc_get_mod_rpc_slot(struct ptlrpc_request *req);
2115 void ptlrpc_put_mod_rpc_slot(struct ptlrpc_request *req);
2117 /* Set of routines to run a function in ptlrpcd context */
2118 void *ptlrpcd_alloc_work(struct obd_import *imp,
2119 int (*cb)(const struct lu_env *, void *), void *data);
2120 void ptlrpcd_destroy_work(void *handler);
2121 int ptlrpcd_queue_work(void *handler);
2124 struct ptlrpc_service_buf_conf {
2125 /* nbufs is buffers # to allocate when growing the pool */
2126 unsigned int bc_nbufs;
2127 /* buffer size to post */
2128 unsigned int bc_buf_size;
2129 /* portal to listed for requests on */
2130 unsigned int bc_req_portal;
2131 /* portal of where to send replies to */
2132 unsigned int bc_rep_portal;
2133 /* maximum request size to be accepted for this service */
2134 unsigned int bc_req_max_size;
2135 /* maximum reply size this service can ever send */
2136 unsigned int bc_rep_max_size;
2139 struct ptlrpc_service_thr_conf {
2140 /* threadname should be 8 characters or less - 6 will be added on */
2142 /* threads increasing factor for each CPU */
2143 unsigned int tc_thr_factor;
2144 /* service threads # to start on each partition while initializing */
2145 unsigned int tc_nthrs_init;
2147 * low water of threads # upper-limit on each partition while running,
2148 * service availability may be impacted if threads number is lower
2149 * than this value. It can be ZERO if the service doesn't require
2150 * CPU affinity or there is only one partition.
2152 unsigned int tc_nthrs_base;
2153 /* "soft" limit for total threads number */
2154 unsigned int tc_nthrs_max;
2155 /* user specified threads number, it will be validated due to
2156 * other members of this structure. */
2157 unsigned int tc_nthrs_user;
2158 /* bind service threads to only CPUs in their associated CPT */
2159 unsigned int tc_cpu_bind;
2160 /* Tags for lu_context associated with service thread */
2164 struct ptlrpc_service_cpt_conf {
2165 struct cfs_cpt_table *cc_cptable;
2166 /* string pattern to describe CPTs for a service */
2168 /* whether or not to have per-CPT service partitions */
2172 struct ptlrpc_service_conf {
2175 /* soft watchdog timeout multiplifier to print stuck service traces */
2176 unsigned int psc_watchdog_factor;
2177 /* buffer information */
2178 struct ptlrpc_service_buf_conf psc_buf;
2179 /* thread information */
2180 struct ptlrpc_service_thr_conf psc_thr;
2181 /* CPU partition information */
2182 struct ptlrpc_service_cpt_conf psc_cpt;
2183 /* function table */
2184 struct ptlrpc_service_ops psc_ops;
2187 /* ptlrpc/service.c */
2189 * Server-side services API. Register/unregister service, request state
2190 * management, service thread management
2194 void ptlrpc_save_lock(struct ptlrpc_request *req, struct lustre_handle *lock,
2195 int mode, bool no_ack, bool convert_lock);
2196 void ptlrpc_commit_replies(struct obd_export *exp);
2197 void ptlrpc_dispatch_difficult_reply(struct ptlrpc_reply_state *rs);
2198 void ptlrpc_schedule_difficult_reply(struct ptlrpc_reply_state *rs);
2199 int ptlrpc_hpreq_handler(struct ptlrpc_request *req);
2200 struct ptlrpc_service *ptlrpc_register_service(
2201 struct ptlrpc_service_conf *conf,
2202 struct kset *parent,
2203 struct dentry *debugfs_entry);
2205 int ptlrpc_unregister_service(struct ptlrpc_service *service);
2206 int ptlrpc_service_health_check(struct ptlrpc_service *);
2207 void ptlrpc_server_drop_request(struct ptlrpc_request *req);
2208 void ptlrpc_request_change_export(struct ptlrpc_request *req,
2209 struct obd_export *export);
2210 void ptlrpc_update_export_timer(struct obd_export *exp,
2211 time64_t extra_delay);
2213 int ptlrpc_hr_init(void);
2214 void ptlrpc_hr_fini(void);
2216 void ptlrpc_watchdog_init(struct delayed_work *work, timeout_t timeout);
2217 void ptlrpc_watchdog_disable(struct delayed_work *work);
2218 void ptlrpc_watchdog_touch(struct delayed_work *work, timeout_t timeout);
2222 /* ptlrpc/import.c */
2227 int ptlrpc_connect_import(struct obd_import *imp);
2228 int ptlrpc_connect_import_locked(struct obd_import *imp);
2229 int ptlrpc_init_import(struct obd_import *imp);
2230 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose);
2231 int ptlrpc_disconnect_and_idle_import(struct obd_import *imp);
2232 int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
2233 void deuuidify(char *uuid, const char *prefix, char **uuid_start,
2235 void ptlrpc_import_enter_resend(struct obd_import *imp);
2236 /* ptlrpc/pack_generic.c */
2237 int ptlrpc_reconnect_import(struct obd_import *imp);
2241 * ptlrpc msg buffer and swab interface
2245 #define PTLRPC_MAX_BUFCOUNT \
2246 (sizeof(((struct ptlrpc_request *)0)->rq_req_swab_mask) * 8)
2247 #define MD_MAX_BUFLEN (MDS_REG_MAXREQSIZE > OUT_MAXREQSIZE ? \
2248 MDS_REG_MAXREQSIZE : OUT_MAXREQSIZE)
2249 #define PTLRPC_MAX_BUFLEN (OST_IO_MAXREQSIZE > MD_MAX_BUFLEN ? \
2250 OST_IO_MAXREQSIZE : MD_MAX_BUFLEN)
2251 int ptlrpc_unpack_rep_msg(struct ptlrpc_request *req, int len);
2252 int ptlrpc_unpack_req_msg(struct ptlrpc_request *req, int len);
2254 int lustre_msg_check_version(struct lustre_msg *msg, __u32 version);
2255 void lustre_init_msg_v2(struct lustre_msg_v2 *msg, int count, __u32 *lens,
2257 int lustre_pack_request(struct ptlrpc_request *, __u32 magic, int count,
2258 __u32 *lens, char **bufs);
2259 int lustre_pack_reply(struct ptlrpc_request *, int count, __u32 *lens,
2261 int lustre_pack_reply_v2(struct ptlrpc_request *req, int count,
2262 __u32 *lens, char **bufs, int flags);
2263 #define LPRFL_EARLY_REPLY 1
2264 int lustre_pack_reply_flags(struct ptlrpc_request *, int count, __u32 *lens,
2265 char **bufs, int flags);
2266 int lustre_shrink_msg(struct lustre_msg *msg, int segment,
2267 unsigned int newlen, int move_data);
2268 int lustre_grow_msg(struct lustre_msg *msg, int segment, unsigned int newlen);
2269 void lustre_free_reply_state(struct ptlrpc_reply_state *rs);
2270 int __lustre_unpack_msg(struct lustre_msg *m, int len);
2271 __u32 lustre_msg_hdr_size(__u32 magic, __u32 count);
2272 __u32 lustre_msg_size(__u32 magic, int count, __u32 *lengths);
2273 __u32 lustre_msg_size_v2(int count, __u32 *lengths);
2274 __u32 lustre_packed_msg_size(struct lustre_msg *msg);
2275 __u32 lustre_msg_early_size(void);
2276 void *lustre_msg_buf_v2(struct lustre_msg_v2 *m, __u32 n, __u32 min_size);
2277 void *lustre_msg_buf(struct lustre_msg *m, __u32 n, __u32 minlen);
2278 __u32 lustre_msg_buflen(struct lustre_msg *m, __u32 n);
2279 void lustre_msg_set_buflen(struct lustre_msg *m, __u32 n, __u32 len);
2280 __u32 lustre_msg_bufcount(struct lustre_msg *m);
2281 char *lustre_msg_string(struct lustre_msg *m, __u32 n, __u32 max_len);
2282 __u32 lustre_msghdr_get_flags(struct lustre_msg *msg);
2283 void lustre_msghdr_set_flags(struct lustre_msg *msg, __u32 flags);
2284 __u32 lustre_msg_get_flags(struct lustre_msg *msg);
2285 void lustre_msg_add_flags(struct lustre_msg *msg, __u32 flags);
2286 void lustre_msg_set_flags(struct lustre_msg *msg, __u32 flags);
2287 void lustre_msg_clear_flags(struct lustre_msg *msg, __u32 flags);
2288 __u32 lustre_msg_get_op_flags(struct lustre_msg *msg);
2289 void lustre_msg_add_op_flags(struct lustre_msg *msg, __u32 flags);
2290 struct lustre_handle *lustre_msg_get_handle(struct lustre_msg *msg);
2291 __u32 lustre_msg_get_type(struct lustre_msg *msg);
2292 enum lustre_msg_version lustre_msg_get_version(struct lustre_msg *msg);
2293 void lustre_msg_add_version(struct lustre_msg *msg, __u32 version);
2294 __u32 lustre_msg_get_opc(struct lustre_msg *msg);
2295 __u64 lustre_msg_get_last_xid(struct lustre_msg *msg);
2296 __u16 lustre_msg_get_tag(struct lustre_msg *msg);
2297 __u64 lustre_msg_get_last_committed(struct lustre_msg *msg);
2298 __u64 *lustre_msg_get_versions(struct lustre_msg *msg);
2299 __u64 lustre_msg_get_transno(struct lustre_msg *msg);
2300 __u64 lustre_msg_get_slv(struct lustre_msg *msg);
2301 __u32 lustre_msg_get_limit(struct lustre_msg *msg);
2302 void lustre_msg_set_slv(struct lustre_msg *msg, __u64 slv);
2303 void lustre_msg_set_limit(struct lustre_msg *msg, __u64 limit);
2304 int lustre_msg_get_status(struct lustre_msg *msg);
2305 __u32 lustre_msg_get_conn_cnt(struct lustre_msg *msg);
2306 __u32 lustre_msg_get_magic(struct lustre_msg *msg);
2307 timeout_t lustre_msg_get_timeout(struct lustre_msg *msg);
2308 timeout_t lustre_msg_get_service_timeout(struct lustre_msg *msg);
2309 char *lustre_msg_get_jobid(struct lustre_msg *msg);
2310 __u32 lustre_msg_get_cksum(struct lustre_msg *msg);
2311 __u64 lustre_msg_get_mbits(struct lustre_msg *msg);
2312 __u32 lustre_msg_calc_cksum(struct lustre_msg *msg, __u32 buf);
2313 void lustre_msg_set_handle(struct lustre_msg *msg,struct lustre_handle *handle);
2314 void lustre_msg_set_type(struct lustre_msg *msg, __u32 type);
2315 void lustre_msg_set_opc(struct lustre_msg *msg, __u32 opc);
2316 void lustre_msg_set_last_xid(struct lustre_msg *msg, __u64 last_xid);
2317 void lustre_msg_set_tag(struct lustre_msg *msg, __u16 tag);
2318 void lustre_msg_set_last_committed(struct lustre_msg *msg,__u64 last_committed);
2319 void lustre_msg_set_versions(struct lustre_msg *msg, __u64 *versions);
2320 void lustre_msg_set_transno(struct lustre_msg *msg, __u64 transno);
2321 void lustre_msg_set_status(struct lustre_msg *msg, __u32 status);
2322 void lustre_msg_set_conn_cnt(struct lustre_msg *msg, __u32 conn_cnt);
2323 void ptlrpc_req_set_repsize(struct ptlrpc_request *req, int count, __u32 *sizes);
2324 void ptlrpc_request_set_replen(struct ptlrpc_request *req);
2325 void lustre_msg_set_timeout(struct lustre_msg *msg, timeout_t timeout);
2326 void lustre_msg_set_service_timeout(struct lustre_msg *msg,
2327 timeout_t service_timeout);
2328 void lustre_msg_set_jobid(struct lustre_msg *msg, char *jobid);
2329 void lustre_msg_set_cksum(struct lustre_msg *msg, __u32 cksum);
2330 void lustre_msg_set_mbits(struct lustre_msg *msg, __u64 mbits);
2333 lustre_shrink_reply(struct ptlrpc_request *req, int segment,
2334 unsigned int newlen, int move_data)
2336 LASSERT(req->rq_reply_state);
2337 LASSERT(req->rq_repmsg);
2338 req->rq_replen = lustre_shrink_msg(req->rq_repmsg, segment,
2342 #ifdef LUSTRE_TRANSLATE_ERRNOS
2344 static inline int ptlrpc_status_hton(int h)
2347 * Positive errnos must be network errnos, such as LUSTRE_EDEADLK,
2348 * ELDLM_LOCK_ABORTED, etc.
2351 return -lustre_errno_hton(-h);
2356 static inline int ptlrpc_status_ntoh(int n)
2359 * See the comment in ptlrpc_status_hton().
2362 return -lustre_errno_ntoh(-n);
2369 #define ptlrpc_status_hton(h) (h)
2370 #define ptlrpc_status_ntoh(n) (n)
2375 /** Change request phase of \a req to \a new_phase */
2377 ptlrpc_rqphase_move(struct ptlrpc_request *req, enum rq_phase new_phase)
2379 if (req->rq_phase == new_phase)
2382 if (new_phase == RQ_PHASE_UNREG_RPC ||
2383 new_phase == RQ_PHASE_UNREG_BULK) {
2384 /* No embedded unregistering phases */
2385 if (req->rq_phase == RQ_PHASE_UNREG_RPC ||
2386 req->rq_phase == RQ_PHASE_UNREG_BULK)
2389 req->rq_next_phase = req->rq_phase;
2391 atomic_inc(&req->rq_import->imp_unregistering);
2394 if (req->rq_phase == RQ_PHASE_UNREG_RPC ||
2395 req->rq_phase == RQ_PHASE_UNREG_BULK) {
2397 atomic_dec(&req->rq_import->imp_unregistering);
2400 DEBUG_REQ(D_INFO, req, "move request phase from %s to %s",
2401 ptlrpc_rqphase2str(req), ptlrpc_phase2str(new_phase));
2403 req->rq_phase = new_phase;
2407 * Returns true if request \a req got early reply and hard deadline is not met
2410 ptlrpc_client_early(struct ptlrpc_request *req)
2412 return req->rq_early;
2416 * Returns true if we got real reply from server for this request
2419 ptlrpc_client_replied(struct ptlrpc_request *req)
2421 if (req->rq_reply_deadline > ktime_get_real_seconds())
2423 return req->rq_replied;
2426 /** Returns true if request \a req is in process of receiving server reply */
2428 ptlrpc_client_recv(struct ptlrpc_request *req)
2430 if (req->rq_reply_deadline > ktime_get_real_seconds())
2432 return req->rq_receiving_reply;
2435 #define ptlrpc_cli_wait_unlink(req) __ptlrpc_cli_wait_unlink(req, NULL)
2438 __ptlrpc_cli_wait_unlink(struct ptlrpc_request *req, bool *discard)
2442 spin_lock(&req->rq_lock);
2443 if (req->rq_reply_deadline > ktime_get_real_seconds()) {
2444 spin_unlock(&req->rq_lock);
2447 if (req->rq_req_deadline > ktime_get_real_seconds()) {
2448 spin_unlock(&req->rq_lock);
2454 if (req->rq_reply_unlinked && req->rq_req_unlinked == 0) {
2456 spin_unlock(&req->rq_lock);
2457 return 1; /* Should call again after LNetMDUnlink */
2461 rc = !req->rq_req_unlinked || !req->rq_reply_unlinked ||
2462 req->rq_receiving_reply;
2463 spin_unlock(&req->rq_lock);
2468 ptlrpc_client_wake_req(struct ptlrpc_request *req)
2471 if (req->rq_set == NULL)
2472 wake_up(&req->rq_reply_waitq);
2474 wake_up(&req->rq_set->set_waitq);
2478 ptlrpc_rs_addref(struct ptlrpc_reply_state *rs)
2480 LASSERT(atomic_read(&rs->rs_refcount) > 0);
2481 atomic_inc(&rs->rs_refcount);
2485 ptlrpc_rs_decref(struct ptlrpc_reply_state *rs)
2487 LASSERT(atomic_read(&rs->rs_refcount) > 0);
2488 if (atomic_dec_and_test(&rs->rs_refcount))
2489 lustre_free_reply_state(rs);
2492 /* Should only be called once per req */
2493 static inline void ptlrpc_req_drop_rs(struct ptlrpc_request *req)
2495 if (req->rq_reply_state == NULL)
2496 return; /* shouldn't occur */
2497 ptlrpc_rs_decref(req->rq_reply_state);
2498 req->rq_reply_state = NULL;
2499 req->rq_repmsg = NULL;
2502 static inline __u32 lustre_request_magic(struct ptlrpc_request *req)
2504 return lustre_msg_get_magic(req->rq_reqmsg);
2507 static inline int ptlrpc_req_get_repsize(struct ptlrpc_request *req)
2509 switch (req->rq_reqmsg->lm_magic) {
2510 case LUSTRE_MSG_MAGIC_V2:
2511 return req->rq_reqmsg->lm_repsize;
2513 LASSERTF(0, "incorrect message magic: %08x\n",
2514 req->rq_reqmsg->lm_magic);
2519 static inline int ptlrpc_send_limit_expired(struct ptlrpc_request *req)
2521 if (req->rq_delay_limit != 0 &&
2522 req->rq_queued_time + req->rq_delay_limit < ktime_get_seconds())
2527 static inline int ptlrpc_no_resend(struct ptlrpc_request *req)
2529 if (!req->rq_no_resend && ptlrpc_send_limit_expired(req)) {
2530 spin_lock(&req->rq_lock);
2531 req->rq_no_resend = 1;
2532 spin_unlock(&req->rq_lock);
2534 return req->rq_no_resend;
2538 ptlrpc_server_get_timeout(struct ptlrpc_service_part *svcpt)
2540 int at = AT_OFF ? 0 : at_get(&svcpt->scp_at_estimate);
2542 return svcpt->scp_service->srv_watchdog_factor *
2543 max_t(int, at, obd_timeout);
2547 * Calculate the amount of time for lock prolongation.
2549 * This is helper function to get the timeout extra time.
2551 * @req current request
2553 * Return: amount of time to extend the timeout with
2555 static inline timeout_t prolong_timeout(struct ptlrpc_request *req)
2557 struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
2558 timeout_t req_timeout = 0;
2561 return obd_timeout / 2;
2563 if (req->rq_deadline > req->rq_arrival_time.tv_sec)
2564 req_timeout = req->rq_deadline - req->rq_arrival_time.tv_sec;
2566 return max(req_timeout,
2567 at_est2timeout(at_get(&svcpt->scp_at_estimate)));
2570 static inline struct ptlrpc_service *
2571 ptlrpc_req2svc(struct ptlrpc_request *req)
2573 LASSERT(req->rq_rqbd != NULL);
2574 return req->rq_rqbd->rqbd_svcpt->scp_service;
2577 /* ldlm/ldlm_lib.c */
2579 * Target client logic
2582 int client_obd_setup(struct obd_device *obd, struct lustre_cfg *lcfg);
2583 int client_obd_cleanup(struct obd_device *obd);
2584 int client_connect_import(const struct lu_env *env,
2585 struct obd_export **exp, struct obd_device *obd,
2586 struct obd_uuid *cluuid, struct obd_connect_data *,
2588 int client_disconnect_export(struct obd_export *exp);
2589 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
2591 int client_import_dyn_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
2592 lnet_nid_t prim_nid, int priority);
2593 int client_import_add_nids_to_conn(struct obd_import *imp, lnet_nid_t *nids,
2594 int nid_count, struct obd_uuid *uuid);
2595 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid);
2596 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
2597 struct obd_uuid *uuid);
2598 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid);
2599 void client_destroy_import(struct obd_import *imp);
2602 #ifdef HAVE_SERVER_SUPPORT
2603 int server_disconnect_export(struct obd_export *exp);
2606 /* ptlrpc/pinger.c */
2608 * Pinger API (client side only)
2611 enum timeout_event {
2614 struct timeout_item;
2615 typedef int (*timeout_cb_t)(struct timeout_item *, void *);
2616 int ptlrpc_pinger_add_import(struct obd_import *imp);
2617 int ptlrpc_pinger_del_import(struct obd_import *imp);
2618 struct ptlrpc_request * ptlrpc_prep_ping(struct obd_import *imp);
2619 int ptlrpc_obd_ping(struct obd_device *obd);
2620 void ping_evictor_start(void);
2621 void ping_evictor_stop(void);
2622 void ptlrpc_pinger_ir_up(void);
2623 void ptlrpc_pinger_ir_down(void);
2625 int ptlrpc_pinger_suppress_pings(void);
2627 /* ptlrpc/ptlrpcd.c */
2628 void ptlrpcd_stop(struct ptlrpcd_ctl *pc, int force);
2629 void ptlrpcd_free(struct ptlrpcd_ctl *pc);
2630 void ptlrpcd_wake(struct ptlrpc_request *req);
2631 void ptlrpcd_add_req(struct ptlrpc_request *req);
2632 void ptlrpcd_add_rqset(struct ptlrpc_request_set *set);
2633 int ptlrpcd_addref(void);
2634 void ptlrpcd_decref(void);
2636 /* ptlrpc/lproc_ptlrpc.c */
2638 * procfs output related functions
2641 const char* ll_opcode2str(__u32 opcode);
2642 const int ll_str2opcode(const char *ops);
2643 #ifdef CONFIG_PROC_FS
2644 void ptlrpc_lprocfs_register_obd(struct obd_device *obd);
2645 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd);
2646 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes);
2648 static inline void ptlrpc_lprocfs_register_obd(struct obd_device *obd) {}
2649 static inline void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd) {}
2650 static inline void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes) {}
2654 /* ptlrpc/llog_server.c */
2655 int llog_origin_handle_open(struct ptlrpc_request *req);
2656 int llog_origin_handle_prev_block(struct ptlrpc_request *req);
2657 int llog_origin_handle_next_block(struct ptlrpc_request *req);
2658 int llog_origin_handle_read_header(struct ptlrpc_request *req);
2660 /* ptlrpc/llog_client.c */
2661 extern const struct llog_operations llog_client_ops;