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 (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * Copyright (c) 2011 Whamcloud, Inc.
36 * This file is part of Lustre, http://www.lustre.org/
37 * Lustre is a trademark of Sun Microsystems, Inc.
39 * lustre/include/lustre_lib.h
41 * Basic Lustre library routines.
52 #include <libcfs/libcfs.h>
53 #include <lustre/lustre_idl.h>
54 #include <lustre_ver.h>
55 #include <lustre_cfg.h>
56 #if defined(__linux__)
57 #include <linux/lustre_lib.h>
58 #elif defined(__APPLE__)
59 #include <darwin/lustre_lib.h>
60 #elif defined(__WINNT__)
61 #include <winnt/lustre_lib.h>
63 #error Unsupported operating system.
67 struct ptlrpc_request;
70 #include <lustre_ha.h>
71 #include <lustre_net.h>
74 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
76 int target_handle_connect(struct ptlrpc_request *req);
77 int target_handle_disconnect(struct ptlrpc_request *req);
78 void target_destroy_export(struct obd_export *exp);
79 int target_pack_pool_reply(struct ptlrpc_request *req);
80 int target_handle_ping(struct ptlrpc_request *req);
81 void target_committed_to_req(struct ptlrpc_request *req);
82 int do_set_info_async(struct obd_import *imp,
83 int opcode, int version,
84 obd_count keylen, void *key,
85 obd_count vallen, void *val,
86 struct ptlrpc_request_set *set);
88 /* quotacheck callback, dqacq/dqrel callback handler */
89 int target_handle_qc_callback(struct ptlrpc_request *req);
90 #ifdef HAVE_QUOTA_SUPPORT
91 int target_handle_dqacq_callback(struct ptlrpc_request *req);
93 #define target_handle_dqacq_callback(req) ldlm_callback_reply(req, -ENOTSUPP)
96 #define OBD_RECOVERY_MAX_TIME (obd_timeout * 18) /* b13079 */
100 void target_cancel_recovery_timer(struct obd_device *obd);
101 void target_stop_recovery_thread(struct obd_device *obd);
102 void target_cleanup_recovery(struct obd_device *obd);
103 int target_queue_recovery_request(struct ptlrpc_request *req,
104 struct obd_device *obd);
105 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id);
106 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
107 struct l_wait_info *lwi);
111 int client_sanobd_setup(struct obd_device *obddev, struct lustre_cfg* lcfg);
112 struct client_obd *client_conn2cli(struct lustre_handle *conn);
115 struct obd_client_handle {
116 struct lustre_handle och_fh;
117 struct lu_fid och_fid;
118 struct md_open_data *och_mod;
122 #define OBD_CLIENT_HANDLE_MAGIC 0xd15ea5ed
125 void statfs_pack(struct obd_statfs *osfs, cfs_kstatfs_t *sfs);
126 void statfs_unpack(cfs_kstatfs_t *sfs, struct obd_statfs *osfs);
132 cfs_semaphore_t l_sem;
133 cfs_spinlock_t l_spin;
136 void l_lock_init(struct lustre_lock *);
137 void l_lock(struct lustre_lock *);
138 void l_unlock(struct lustre_lock *);
139 int l_has_lock(struct lustre_lock *);
144 #define OBD_IOCTL_VERSION 0x00010004
146 struct obd_ioctl_data {
163 struct obdo ioc_obdo1;
164 struct obdo ioc_obdo2;
175 /* buffers the kernel will treat as user pointers */
181 /* inline buffers for various arguments */
194 struct obd_ioctl_hdr {
199 static inline int obd_ioctl_packlen(struct obd_ioctl_data *data)
201 int len = cfs_size_round(sizeof(struct obd_ioctl_data));
202 len += cfs_size_round(data->ioc_inllen1);
203 len += cfs_size_round(data->ioc_inllen2);
204 len += cfs_size_round(data->ioc_inllen3);
205 len += cfs_size_round(data->ioc_inllen4);
210 static inline int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
212 if (data->ioc_len > (1<<30)) {
213 CERROR("OBD ioctl: ioc_len larger than 1<<30\n");
216 if (data->ioc_inllen1 > (1<<30)) {
217 CERROR("OBD ioctl: ioc_inllen1 larger than 1<<30\n");
220 if (data->ioc_inllen2 > (1<<30)) {
221 CERROR("OBD ioctl: ioc_inllen2 larger than 1<<30\n");
224 if (data->ioc_inllen3 > (1<<30)) {
225 CERROR("OBD ioctl: ioc_inllen3 larger than 1<<30\n");
228 if (data->ioc_inllen4 > (1<<30)) {
229 CERROR("OBD ioctl: ioc_inllen4 larger than 1<<30\n");
232 if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
233 CERROR("OBD ioctl: inlbuf1 pointer but 0 length\n");
236 if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
237 CERROR("OBD ioctl: inlbuf2 pointer but 0 length\n");
240 if (data->ioc_inlbuf3 && !data->ioc_inllen3) {
241 CERROR("OBD ioctl: inlbuf3 pointer but 0 length\n");
244 if (data->ioc_inlbuf4 && !data->ioc_inllen4) {
245 CERROR("OBD ioctl: inlbuf4 pointer but 0 length\n");
248 if (data->ioc_pbuf1 && !data->ioc_plen1) {
249 CERROR("OBD ioctl: pbuf1 pointer but 0 length\n");
252 if (data->ioc_pbuf2 && !data->ioc_plen2) {
253 CERROR("OBD ioctl: pbuf2 pointer but 0 length\n");
256 if (data->ioc_plen1 && !data->ioc_pbuf1) {
257 CERROR("OBD ioctl: plen1 set but NULL pointer\n");
260 if (data->ioc_plen2 && !data->ioc_pbuf2) {
261 CERROR("OBD ioctl: plen2 set but NULL pointer\n");
264 if (obd_ioctl_packlen(data) > data->ioc_len) {
265 CERROR("OBD ioctl: packlen exceeds ioc_len (%d > %d)\n",
266 obd_ioctl_packlen(data), data->ioc_len);
273 static inline int obd_ioctl_pack(struct obd_ioctl_data *data, char **pbuf,
277 struct obd_ioctl_data *overlay;
278 data->ioc_len = obd_ioctl_packlen(data);
279 data->ioc_version = OBD_IOCTL_VERSION;
281 if (*pbuf && data->ioc_len > max)
284 *pbuf = malloc(data->ioc_len);
288 overlay = (struct obd_ioctl_data *)*pbuf;
289 memcpy(*pbuf, data, sizeof(*data));
291 ptr = overlay->ioc_bulk;
292 if (data->ioc_inlbuf1)
293 LOGL(data->ioc_inlbuf1, data->ioc_inllen1, ptr);
294 if (data->ioc_inlbuf2)
295 LOGL(data->ioc_inlbuf2, data->ioc_inllen2, ptr);
296 if (data->ioc_inlbuf3)
297 LOGL(data->ioc_inlbuf3, data->ioc_inllen3, ptr);
298 if (data->ioc_inlbuf4)
299 LOGL(data->ioc_inlbuf4, data->ioc_inllen4, ptr);
300 if (obd_ioctl_is_invalid(overlay))
306 static inline int obd_ioctl_unpack(struct obd_ioctl_data *data, char *pbuf,
310 struct obd_ioctl_data *overlay;
314 overlay = (struct obd_ioctl_data *)pbuf;
316 /* Preserve the caller's buffer pointers */
317 overlay->ioc_inlbuf1 = data->ioc_inlbuf1;
318 overlay->ioc_inlbuf2 = data->ioc_inlbuf2;
319 overlay->ioc_inlbuf3 = data->ioc_inlbuf3;
320 overlay->ioc_inlbuf4 = data->ioc_inlbuf4;
322 memcpy(data, pbuf, sizeof(*data));
324 ptr = overlay->ioc_bulk;
325 if (data->ioc_inlbuf1)
326 LOGU(data->ioc_inlbuf1, data->ioc_inllen1, ptr);
327 if (data->ioc_inlbuf2)
328 LOGU(data->ioc_inlbuf2, data->ioc_inllen2, ptr);
329 if (data->ioc_inlbuf3)
330 LOGU(data->ioc_inlbuf3, data->ioc_inllen3, ptr);
331 if (data->ioc_inlbuf4)
332 LOGU(data->ioc_inlbuf4, data->ioc_inllen4, ptr);
338 #include <obd_support.h>
341 /* function defined in lustre/obdclass/<platform>/<platform>-module.c */
342 int obd_ioctl_getdata(char **buf, int *len, void *arg);
343 int obd_ioctl_popdata(void *arg, void *data, int len);
345 /* buffer MUST be at least the size of obd_ioctl_hdr */
346 static inline int obd_ioctl_getdata(char **buf, int *len, void *arg)
348 struct obd_ioctl_hdr hdr;
349 struct obd_ioctl_data *data;
354 err = cfs_copy_from_user(&hdr, (void *)arg, sizeof(hdr));
358 if (hdr.ioc_version != OBD_IOCTL_VERSION) {
359 CERROR("Version mismatch kernel vs application\n");
363 if (hdr.ioc_len > OBD_MAX_IOCTL_BUFFER) {
364 CERROR("User buffer len %d exceeds %d max buffer\n",
365 hdr.ioc_len, OBD_MAX_IOCTL_BUFFER);
369 if (hdr.ioc_len < sizeof(struct obd_ioctl_data)) {
370 CERROR("User buffer too small for ioctl (%d)\n", hdr.ioc_len);
374 OBD_ALLOC_LARGE(*buf, hdr.ioc_len);
376 CERROR("Cannot allocate control buffer of len %d\n",
381 data = (struct obd_ioctl_data *)*buf;
383 err = cfs_copy_from_user(*buf, (void *)arg, hdr.ioc_len);
385 OBD_FREE_LARGE(*buf, hdr.ioc_len);
389 if (obd_ioctl_is_invalid(data)) {
390 CERROR("ioctl not correctly formatted\n");
391 OBD_FREE_LARGE(*buf, hdr.ioc_len);
395 if (data->ioc_inllen1) {
396 data->ioc_inlbuf1 = &data->ioc_bulk[0];
397 offset += cfs_size_round(data->ioc_inllen1);
400 if (data->ioc_inllen2) {
401 data->ioc_inlbuf2 = &data->ioc_bulk[0] + offset;
402 offset += cfs_size_round(data->ioc_inllen2);
405 if (data->ioc_inllen3) {
406 data->ioc_inlbuf3 = &data->ioc_bulk[0] + offset;
407 offset += cfs_size_round(data->ioc_inllen3);
410 if (data->ioc_inllen4) {
411 data->ioc_inlbuf4 = &data->ioc_bulk[0] + offset;
417 static inline int obd_ioctl_popdata(void *arg, void *data, int len)
419 int err = cfs_copy_to_user(arg, data, len);
426 static inline void obd_ioctl_freedata(char *buf, int len)
430 OBD_FREE_LARGE(buf, len);
436 * BSD ioctl description:
437 * #define IOC_V1 _IOR(g, n1, long)
438 * #define IOC_V2 _IOW(g, n2, long)
440 * ioctl(f, IOC_V1, arg);
441 * arg will be treated as a long value,
443 * ioctl(f, IOC_V2, arg)
444 * arg will be treated as a pointer, bsd will call
445 * copyin(buf, arg, sizeof(long))
447 * To make BSD ioctl handles argument correctly and simplely,
448 * we change _IOR to _IOWR so BSD will copyin obd_ioctl_data
449 * for us. Does this change affect Linux? (XXX Liang)
451 #define OBD_IOC_CREATE _IOWR('f', 101, OBD_IOC_DATA_TYPE)
452 #define OBD_IOC_DESTROY _IOW ('f', 104, OBD_IOC_DATA_TYPE)
453 #define OBD_IOC_PREALLOCATE _IOWR('f', 105, OBD_IOC_DATA_TYPE)
455 #define OBD_IOC_SETATTR _IOW ('f', 107, OBD_IOC_DATA_TYPE)
456 #define OBD_IOC_GETATTR _IOWR ('f', 108, OBD_IOC_DATA_TYPE)
457 #define OBD_IOC_READ _IOWR('f', 109, OBD_IOC_DATA_TYPE)
458 #define OBD_IOC_WRITE _IOWR('f', 110, OBD_IOC_DATA_TYPE)
461 #define OBD_IOC_STATFS _IOWR('f', 113, OBD_IOC_DATA_TYPE)
462 #define OBD_IOC_SYNC _IOW ('f', 114, OBD_IOC_DATA_TYPE)
463 #define OBD_IOC_READ2 _IOWR('f', 115, OBD_IOC_DATA_TYPE)
464 #define OBD_IOC_FORMAT _IOWR('f', 116, OBD_IOC_DATA_TYPE)
465 #define OBD_IOC_PARTITION _IOWR('f', 117, OBD_IOC_DATA_TYPE)
466 #define OBD_IOC_COPY _IOWR('f', 120, OBD_IOC_DATA_TYPE)
467 #define OBD_IOC_MIGR _IOWR('f', 121, OBD_IOC_DATA_TYPE)
468 #define OBD_IOC_PUNCH _IOWR('f', 122, OBD_IOC_DATA_TYPE)
470 #define OBD_IOC_MODULE_DEBUG _IOWR('f', 124, OBD_IOC_DATA_TYPE)
471 #define OBD_IOC_BRW_READ _IOWR('f', 125, OBD_IOC_DATA_TYPE)
472 #define OBD_IOC_BRW_WRITE _IOWR('f', 126, OBD_IOC_DATA_TYPE)
473 #define OBD_IOC_NAME2DEV _IOWR('f', 127, OBD_IOC_DATA_TYPE)
474 #define OBD_IOC_UUID2DEV _IOWR('f', 130, OBD_IOC_DATA_TYPE)
475 #define OBD_IOC_GETNAME _IOWR('f', 131, OBD_IOC_DATA_TYPE)
477 #define OBD_IOC_LOV_GET_CONFIG _IOWR('f', 132, OBD_IOC_DATA_TYPE)
478 #define OBD_IOC_CLIENT_RECOVER _IOW ('f', 133, OBD_IOC_DATA_TYPE)
479 #define OBD_IOC_PING_TARGET _IOW ('f', 136, OBD_IOC_DATA_TYPE)
481 #define OBD_IOC_DEC_FS_USE_COUNT _IO ('f', 139 )
482 #define OBD_IOC_NO_TRANSNO _IOW ('f', 140, OBD_IOC_DATA_TYPE)
483 #define OBD_IOC_SET_READONLY _IOW ('f', 141, OBD_IOC_DATA_TYPE)
484 #define OBD_IOC_ABORT_RECOVERY _IOR ('f', 142, OBD_IOC_DATA_TYPE)
486 #define OBD_IOC_ROOT_SQUASH _IOWR('f', 143, OBD_IOC_DATA_TYPE)
488 #define OBD_GET_VERSION _IOWR ('f', 144, OBD_IOC_DATA_TYPE)
490 #define OBD_IOC_GSS_SUPPORT _IOWR('f', 145, OBD_IOC_DATA_TYPE)
492 #define OBD_IOC_CLOSE_UUID _IOWR ('f', 147, OBD_IOC_DATA_TYPE)
494 #define OBD_IOC_CHANGELOG_SEND _IOW ('f', 148, OBD_IOC_DATA_TYPE)
495 #define OBD_IOC_GETDEVICE _IOWR ('f', 149, OBD_IOC_DATA_TYPE)
496 #define OBD_IOC_FID2PATH _IOWR ('f', 150, OBD_IOC_DATA_TYPE)
497 /* see also <lustre/lustre_user.h> for ioctls 151-153 */
498 /* OBD_IOC_LOV_SETSTRIPE: See also LL_IOC_LOV_SETSTRIPE */
499 #define OBD_IOC_LOV_SETSTRIPE _IOW ('f', 154, OBD_IOC_DATA_TYPE)
500 /* OBD_IOC_LOV_GETSTRIPE: See also LL_IOC_LOV_GETSTRIPE */
501 #define OBD_IOC_LOV_GETSTRIPE _IOW ('f', 155, OBD_IOC_DATA_TYPE)
502 /* OBD_IOC_LOV_SETEA: See also LL_IOC_LOV_SETEA */
503 #define OBD_IOC_LOV_SETEA _IOW ('f', 156, OBD_IOC_DATA_TYPE)
504 /* see <lustre/lustre_user.h> for ioctls 157-159 */
505 /* OBD_IOC_QUOTACHECK: See also LL_IOC_QUOTACHECK */
506 #define OBD_IOC_QUOTACHECK _IOW ('f', 160, int)
507 /* OBD_IOC_POLL_QUOTACHECK: See also LL_IOC_POLL_QUOTACHECK */
508 #define OBD_IOC_POLL_QUOTACHECK _IOR ('f', 161, struct if_quotacheck *)
509 /* OBD_IOC_QUOTACTL: See also LL_IOC_QUOTACTL */
510 #define OBD_IOC_QUOTACTL _IOWR('f', 162, struct if_quotactl)
511 /* see also <lustre/lustre_user.h> for ioctls 163-176 */
512 #define OBD_IOC_CHANGELOG_REG _IOW ('f', 177, struct obd_ioctl_data)
513 #define OBD_IOC_CHANGELOG_DEREG _IOW ('f', 178, struct obd_ioctl_data)
514 #define OBD_IOC_CHANGELOG_CLEAR _IOW ('f', 179, struct obd_ioctl_data)
515 #define OBD_IOC_RECORD _IOWR('f', 180, OBD_IOC_DATA_TYPE)
516 #define OBD_IOC_ENDRECORD _IOWR('f', 181, OBD_IOC_DATA_TYPE)
517 #define OBD_IOC_PARSE _IOWR('f', 182, OBD_IOC_DATA_TYPE)
518 #define OBD_IOC_DORECORD _IOWR('f', 183, OBD_IOC_DATA_TYPE)
519 #define OBD_IOC_PROCESS_CFG _IOWR('f', 184, OBD_IOC_DATA_TYPE)
520 #define OBD_IOC_DUMP_LOG _IOWR('f', 185, OBD_IOC_DATA_TYPE)
521 #define OBD_IOC_CLEAR_LOG _IOWR('f', 186, OBD_IOC_DATA_TYPE)
522 #define OBD_IOC_PARAM _IOW ('f', 187, OBD_IOC_DATA_TYPE)
523 #define OBD_IOC_POOL _IOWR('f', 188, OBD_IOC_DATA_TYPE)
525 #define OBD_IOC_CATLOGLIST _IOWR('f', 190, OBD_IOC_DATA_TYPE)
526 #define OBD_IOC_LLOG_INFO _IOWR('f', 191, OBD_IOC_DATA_TYPE)
527 #define OBD_IOC_LLOG_PRINT _IOWR('f', 192, OBD_IOC_DATA_TYPE)
528 #define OBD_IOC_LLOG_CANCEL _IOWR('f', 193, OBD_IOC_DATA_TYPE)
529 #define OBD_IOC_LLOG_REMOVE _IOWR('f', 194, OBD_IOC_DATA_TYPE)
530 #define OBD_IOC_LLOG_CHECK _IOWR('f', 195, OBD_IOC_DATA_TYPE)
531 #define OBD_IOC_LLOG_CATINFO _IOWR('f', 196, OBD_IOC_DATA_TYPE)
533 #define ECHO_IOC_GET_STRIPE _IOWR('f', 200, OBD_IOC_DATA_TYPE)
534 #define ECHO_IOC_SET_STRIPE _IOWR('f', 201, OBD_IOC_DATA_TYPE)
535 #define ECHO_IOC_ENQUEUE _IOWR('f', 202, OBD_IOC_DATA_TYPE)
536 #define ECHO_IOC_CANCEL _IOWR('f', 203, OBD_IOC_DATA_TYPE)
538 #define OBD_IOC_GET_OBJ_VERSION _IOR('f', 210, OBD_IOC_DATA_TYPE)
540 /* XXX _IOWR('f', 250, long) has been defined in
541 * libcfs/include/libcfs/libcfs_private.h for debug, don't use it
544 /* Until such time as we get_info the per-stripe maximum from the OST,
545 * we define this to be 2T - 4k, which is the ext3 maxbytes. */
546 #define LUSTRE_STRIPE_MAXBYTES 0x1fffffff000ULL
548 /* Special values for remove LOV EA from disk */
549 #define LOVEA_DELETE_VALUES(size, count, offset) (size == 0 && count == 0 && \
550 offset == (typeof(offset))(-1))
552 /* #define POISON_BULK 0 */
555 * l_wait_event is a flexible sleeping function, permitting simple caller
556 * configuration of interrupt and timeout sensitivity along with actions to
557 * be performed in the event of either exception.
559 * The first form of usage looks like this:
561 * struct l_wait_info lwi = LWI_TIMEOUT_INTR(timeout, timeout_handler,
562 * intr_handler, callback_data);
563 * rc = l_wait_event(waitq, condition, &lwi);
565 * l_wait_event() makes the current process wait on 'waitq' until 'condition'
566 * is TRUE or a "killable" signal (SIGTERM, SIKGILL, SIGINT) is pending. It
567 * returns 0 to signify 'condition' is TRUE, but if a signal wakes it before
568 * 'condition' becomes true, it optionally calls the specified 'intr_handler'
569 * if not NULL, and returns -EINTR.
571 * If a non-zero timeout is specified, signals are ignored until the timeout
572 * has expired. At this time, if 'timeout_handler' is not NULL it is called.
573 * If it returns FALSE l_wait_event() continues to wait as described above with
574 * signals enabled. Otherwise it returns -ETIMEDOUT.
576 * LWI_INTR(intr_handler, callback_data) is shorthand for
577 * LWI_TIMEOUT_INTR(0, NULL, intr_handler, callback_data)
579 * The second form of usage looks like this:
581 * struct l_wait_info lwi = LWI_TIMEOUT(timeout, timeout_handler);
582 * rc = l_wait_event(waitq, condition, &lwi);
584 * This form is the same as the first except that it COMPLETELY IGNORES
585 * SIGNALS. The caller must therefore beware that if 'timeout' is zero, or if
586 * 'timeout_handler' is not NULL and returns FALSE, then the ONLY thing that
587 * can unblock the current process is 'condition' becoming TRUE.
589 * Another form of usage is:
590 * struct l_wait_info lwi = LWI_TIMEOUT_INTERVAL(timeout, interval,
592 * rc = l_wait_event(waitq, condition, &lwi);
593 * This is the same as previous case, but condition is checked once every
594 * 'interval' jiffies (if non-zero).
596 * Subtle synchronization point: this macro does *not* necessary takes
597 * wait-queue spin-lock before returning, and, hence, following idiom is safe
598 * ONLY when caller provides some external locking:
602 * l_wait_event(&obj->wq, ....); (1)
604 * wake_up(&obj->wq): (2)
605 * spin_lock(&q->lock); (2.1)
606 * __wake_up_common(q, ...); (2.2)
607 * spin_unlock(&q->lock, flags); (2.3)
609 * OBD_FREE_PTR(obj); (3)
611 * As l_wait_event() may "short-cut" execution and return without taking
612 * wait-queue spin-lock, some additional synchronization is necessary to
613 * guarantee that step (3) can begin only after (2.3) finishes.
615 * XXX nikita: some ptlrpc daemon threads have races of that sort.
618 static inline int back_to_sleep(void *arg)
623 #define LWI_ON_SIGNAL_NOOP ((void (*)(void *))(-1))
626 cfs_duration_t lwi_timeout;
627 cfs_duration_t lwi_interval;
629 int (*lwi_on_timeout)(void *);
630 void (*lwi_on_signal)(void *);
634 /* NB: LWI_TIMEOUT ignores signals completely */
635 #define LWI_TIMEOUT(time, cb, data) \
636 ((struct l_wait_info) { \
637 .lwi_timeout = time, \
638 .lwi_on_timeout = cb, \
639 .lwi_cb_data = data, \
641 .lwi_allow_intr = 0 \
644 #define LWI_TIMEOUT_INTERVAL(time, interval, cb, data) \
645 ((struct l_wait_info) { \
646 .lwi_timeout = time, \
647 .lwi_on_timeout = cb, \
648 .lwi_cb_data = data, \
649 .lwi_interval = interval, \
650 .lwi_allow_intr = 0 \
653 #define LWI_TIMEOUT_INTR(time, time_cb, sig_cb, data) \
654 ((struct l_wait_info) { \
655 .lwi_timeout = time, \
656 .lwi_on_timeout = time_cb, \
657 .lwi_on_signal = sig_cb, \
658 .lwi_cb_data = data, \
660 .lwi_allow_intr = 0 \
663 #define LWI_TIMEOUT_INTR_ALL(time, time_cb, sig_cb, data) \
664 ((struct l_wait_info) { \
665 .lwi_timeout = time, \
666 .lwi_on_timeout = time_cb, \
667 .lwi_on_signal = sig_cb, \
668 .lwi_cb_data = data, \
670 .lwi_allow_intr = 1 \
673 #define LWI_INTR(cb, data) LWI_TIMEOUT_INTR(0, NULL, cb, data)
678 * wait for @condition to become true, but no longer than timeout, specified
681 #define __l_wait_event(wq, condition, info, ret, l_add_wait) \
683 cfs_waitlink_t __wait; \
684 cfs_duration_t __timeout = info->lwi_timeout; \
685 cfs_sigset_t __blocked; \
686 int __allow_intr = info->lwi_allow_intr; \
692 cfs_waitlink_init(&__wait); \
693 l_add_wait(&wq, &__wait); \
695 /* Block all signals (just the non-fatal ones if no timeout). */ \
696 if (info->lwi_on_signal != NULL && (__timeout == 0 || __allow_intr)) \
697 __blocked = cfs_block_sigsinv(LUSTRE_FATAL_SIGS); \
699 __blocked = cfs_block_sigsinv(0); \
704 __wstate = info->lwi_on_signal != NULL && \
705 (__timeout == 0 || __allow_intr) ? \
706 CFS_TASK_INTERRUPTIBLE : CFS_TASK_UNINT; \
708 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE); \
713 if (__timeout == 0) { \
714 cfs_waitq_wait(&__wait, __wstate); \
716 cfs_duration_t interval = info->lwi_interval? \
717 min_t(cfs_duration_t, \
718 info->lwi_interval,__timeout):\
720 cfs_duration_t remaining = cfs_waitq_timedwait(&__wait,\
723 __timeout = cfs_time_sub(__timeout, \
724 cfs_time_sub(interval, remaining));\
725 if (__timeout == 0) { \
726 if (info->lwi_on_timeout == NULL || \
727 info->lwi_on_timeout(info->lwi_cb_data)) { \
731 /* Take signals after the timeout expires. */ \
732 if (info->lwi_on_signal != NULL) \
733 (void)cfs_block_sigsinv(LUSTRE_FATAL_SIGS);\
739 if (cfs_signal_pending()) { \
740 if (info->lwi_on_signal != NULL && \
741 (__timeout == 0 || __allow_intr)) { \
742 if (info->lwi_on_signal != LWI_ON_SIGNAL_NOOP) \
743 info->lwi_on_signal(info->lwi_cb_data);\
747 /* We have to do this here because some signals */ \
748 /* are not blockable - ie from strace(1). */ \
749 /* In these cases we want to schedule_timeout() */ \
750 /* again, because we don't want that to return */ \
751 /* -EINTR when the RPC actually succeeded. */ \
752 /* the RECALC_SIGPENDING below will deliver the */ \
753 /* signal properly. */ \
754 cfs_clear_sigpending(); \
758 cfs_block_sigs(__blocked); \
760 cfs_set_current_state(CFS_TASK_RUNNING); \
761 cfs_waitq_del(&wq, &__wait); \
764 #else /* !__KERNEL__ */
765 #define __l_wait_event(wq, condition, info, ret, l_add_wait) \
767 long __timeout = info->lwi_timeout; \
770 int __timed_out = 0; \
771 int __interval = obd_timeout; \
777 if (__timeout != 0) \
778 __then = time(NULL); \
780 if (__timeout && __timeout < __interval) \
781 __interval = __timeout; \
782 if (info->lwi_interval && info->lwi_interval < __interval) \
783 __interval = info->lwi_interval; \
785 while (!(condition)) { \
786 liblustre_wait_event(__interval); \
790 if (!__timed_out && info->lwi_timeout != 0) { \
791 __now = time(NULL); \
792 __timeout -= __now - __then; \
800 if (info->lwi_on_timeout == NULL || \
801 info->lwi_on_timeout(info->lwi_cb_data)) { \
809 #endif /* __KERNEL__ */
812 #define l_wait_event(wq, condition, info) \
815 struct l_wait_info *__info = (info); \
817 __l_wait_event(wq, condition, __info, \
818 __ret, cfs_waitq_add); \
822 #define l_wait_event_exclusive(wq, condition, info) \
825 struct l_wait_info *__info = (info); \
827 __l_wait_event(wq, condition, __info, \
828 __ret, cfs_waitq_add_exclusive); \
832 #define l_wait_event_exclusive_head(wq, condition, info) \
835 struct l_wait_info *__info = (info); \
837 __l_wait_event(wq, condition, __info, \
838 __ret, cfs_waitq_add_exclusive_head); \
842 #define l_wait_condition(wq, condition) \
844 struct l_wait_info lwi = { 0 }; \
845 l_wait_event(wq, condition, &lwi); \
848 #define l_wait_condition_exclusive(wq, condition) \
850 struct l_wait_info lwi = { 0 }; \
851 l_wait_event_exclusive(wq, condition, &lwi); \
854 #define l_wait_condition_exclusive_head(wq, condition) \
856 struct l_wait_info lwi = { 0 }; \
857 l_wait_event_exclusive_head(wq, condition, &lwi); \
861 #define LIBLUSTRE_CLIENT (0)
863 #define LIBLUSTRE_CLIENT (1)
868 #endif /* _LUSTRE_LIB_H */