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 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/include/lustre_lib.h
38 * Basic Lustre library routines.
49 #include <libcfs/libcfs.h>
50 #include <lustre/lustre_idl.h>
51 #include <lustre_ver.h>
52 #include <lustre_cfg.h>
53 #if defined(__linux__)
54 #include <linux/lustre_lib.h>
55 #elif defined(__APPLE__)
56 #include <darwin/lustre_lib.h>
57 #elif defined(__WINNT__)
58 #include <winnt/lustre_lib.h>
60 #error Unsupported operating system.
64 struct ptlrpc_request;
67 #include <lustre_ha.h>
68 #include <lustre_net.h>
71 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
73 int target_handle_connect(struct ptlrpc_request *req);
74 int target_handle_disconnect(struct ptlrpc_request *req);
75 void target_destroy_export(struct obd_export *exp);
76 int target_pack_pool_reply(struct ptlrpc_request *req);
77 int target_handle_ping(struct ptlrpc_request *req);
78 void target_committed_to_req(struct ptlrpc_request *req);
79 int do_set_info_async(struct obd_import *imp,
80 int opcode, int version,
81 obd_count keylen, void *key,
82 obd_count vallen, void *val,
83 struct ptlrpc_request_set *set);
85 /* quotacheck callback, dqacq/dqrel callback handler */
86 int target_handle_qc_callback(struct ptlrpc_request *req);
87 #ifdef HAVE_QUOTA_SUPPORT
88 int target_handle_dqacq_callback(struct ptlrpc_request *req);
90 #define target_handle_dqacq_callback(req) ldlm_callback_reply(req, -ENOTSUPP)
93 #define OBD_RECOVERY_MAX_TIME (obd_timeout * 18) /* b13079 */
95 void target_cancel_recovery_timer(struct obd_device *obd);
96 void target_stop_recovery_thread(struct obd_device *obd);
97 void target_cleanup_recovery(struct obd_device *obd);
98 int target_queue_recovery_request(struct ptlrpc_request *req,
99 struct obd_device *obd);
100 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id);
104 int client_sanobd_setup(struct obd_device *obddev, struct lustre_cfg* lcfg);
105 struct client_obd *client_conn2cli(struct lustre_handle *conn);
108 struct obd_client_handle {
109 struct lustre_handle och_fh;
110 struct lu_fid och_fid;
111 struct md_open_data *och_mod;
115 #define OBD_CLIENT_HANDLE_MAGIC 0xd15ea5ed
118 void statfs_pack(struct obd_statfs *osfs, cfs_kstatfs_t *sfs);
119 void statfs_unpack(cfs_kstatfs_t *sfs, struct obd_statfs *osfs);
125 cfs_semaphore_t l_sem;
126 cfs_spinlock_t l_spin;
129 void l_lock_init(struct lustre_lock *);
130 void l_lock(struct lustre_lock *);
131 void l_unlock(struct lustre_lock *);
132 int l_has_lock(struct lustre_lock *);
137 #define OBD_IOCTL_VERSION 0x00010004
139 struct obd_ioctl_data {
156 struct obdo ioc_obdo1;
157 struct obdo ioc_obdo2;
168 /* buffers the kernel will treat as user pointers */
174 /* inline buffers for various arguments */
187 struct obd_ioctl_hdr {
192 static inline int obd_ioctl_packlen(struct obd_ioctl_data *data)
194 int len = cfs_size_round(sizeof(struct obd_ioctl_data));
195 len += cfs_size_round(data->ioc_inllen1);
196 len += cfs_size_round(data->ioc_inllen2);
197 len += cfs_size_round(data->ioc_inllen3);
198 len += cfs_size_round(data->ioc_inllen4);
203 static inline int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
205 if (data->ioc_len > (1<<30)) {
206 CERROR("OBD ioctl: ioc_len larger than 1<<30\n");
209 if (data->ioc_inllen1 > (1<<30)) {
210 CERROR("OBD ioctl: ioc_inllen1 larger than 1<<30\n");
213 if (data->ioc_inllen2 > (1<<30)) {
214 CERROR("OBD ioctl: ioc_inllen2 larger than 1<<30\n");
217 if (data->ioc_inllen3 > (1<<30)) {
218 CERROR("OBD ioctl: ioc_inllen3 larger than 1<<30\n");
221 if (data->ioc_inllen4 > (1<<30)) {
222 CERROR("OBD ioctl: ioc_inllen4 larger than 1<<30\n");
225 if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
226 CERROR("OBD ioctl: inlbuf1 pointer but 0 length\n");
229 if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
230 CERROR("OBD ioctl: inlbuf2 pointer but 0 length\n");
233 if (data->ioc_inlbuf3 && !data->ioc_inllen3) {
234 CERROR("OBD ioctl: inlbuf3 pointer but 0 length\n");
237 if (data->ioc_inlbuf4 && !data->ioc_inllen4) {
238 CERROR("OBD ioctl: inlbuf4 pointer but 0 length\n");
241 if (data->ioc_pbuf1 && !data->ioc_plen1) {
242 CERROR("OBD ioctl: pbuf1 pointer but 0 length\n");
245 if (data->ioc_pbuf2 && !data->ioc_plen2) {
246 CERROR("OBD ioctl: pbuf2 pointer but 0 length\n");
249 if (data->ioc_plen1 && !data->ioc_pbuf1) {
250 CERROR("OBD ioctl: plen1 set but NULL pointer\n");
253 if (data->ioc_plen2 && !data->ioc_pbuf2) {
254 CERROR("OBD ioctl: plen2 set but NULL pointer\n");
257 if (obd_ioctl_packlen(data) > data->ioc_len) {
258 CERROR("OBD ioctl: packlen exceeds ioc_len (%d > %d)\n",
259 obd_ioctl_packlen(data), data->ioc_len);
266 static inline int obd_ioctl_pack(struct obd_ioctl_data *data, char **pbuf,
270 struct obd_ioctl_data *overlay;
271 data->ioc_len = obd_ioctl_packlen(data);
272 data->ioc_version = OBD_IOCTL_VERSION;
274 if (*pbuf && data->ioc_len > max)
277 *pbuf = malloc(data->ioc_len);
281 overlay = (struct obd_ioctl_data *)*pbuf;
282 memcpy(*pbuf, data, sizeof(*data));
284 ptr = overlay->ioc_bulk;
285 if (data->ioc_inlbuf1)
286 LOGL(data->ioc_inlbuf1, data->ioc_inllen1, ptr);
287 if (data->ioc_inlbuf2)
288 LOGL(data->ioc_inlbuf2, data->ioc_inllen2, ptr);
289 if (data->ioc_inlbuf3)
290 LOGL(data->ioc_inlbuf3, data->ioc_inllen3, ptr);
291 if (data->ioc_inlbuf4)
292 LOGL(data->ioc_inlbuf4, data->ioc_inllen4, ptr);
293 if (obd_ioctl_is_invalid(overlay))
299 static inline int obd_ioctl_unpack(struct obd_ioctl_data *data, char *pbuf,
303 struct obd_ioctl_data *overlay;
307 overlay = (struct obd_ioctl_data *)pbuf;
309 /* Preserve the caller's buffer pointers */
310 overlay->ioc_inlbuf1 = data->ioc_inlbuf1;
311 overlay->ioc_inlbuf2 = data->ioc_inlbuf2;
312 overlay->ioc_inlbuf3 = data->ioc_inlbuf3;
313 overlay->ioc_inlbuf4 = data->ioc_inlbuf4;
315 memcpy(data, pbuf, sizeof(*data));
317 ptr = overlay->ioc_bulk;
318 if (data->ioc_inlbuf1)
319 LOGU(data->ioc_inlbuf1, data->ioc_inllen1, ptr);
320 if (data->ioc_inlbuf2)
321 LOGU(data->ioc_inlbuf2, data->ioc_inllen2, ptr);
322 if (data->ioc_inlbuf3)
323 LOGU(data->ioc_inlbuf3, data->ioc_inllen3, ptr);
324 if (data->ioc_inlbuf4)
325 LOGU(data->ioc_inlbuf4, data->ioc_inllen4, ptr);
331 #include <obd_support.h>
334 /* function defined in lustre/obdclass/<platform>/<platform>-module.c */
335 int obd_ioctl_getdata(char **buf, int *len, void *arg);
336 int obd_ioctl_popdata(void *arg, void *data, int len);
338 /* buffer MUST be at least the size of obd_ioctl_hdr */
339 static inline int obd_ioctl_getdata(char **buf, int *len, void *arg)
341 struct obd_ioctl_hdr hdr;
342 struct obd_ioctl_data *data;
347 err = cfs_copy_from_user(&hdr, (void *)arg, sizeof(hdr));
351 if (hdr.ioc_version != OBD_IOCTL_VERSION) {
352 CERROR("Version mismatch kernel vs application\n");
356 if (hdr.ioc_len > OBD_MAX_IOCTL_BUFFER) {
357 CERROR("User buffer len %d exceeds %d max buffer\n",
358 hdr.ioc_len, OBD_MAX_IOCTL_BUFFER);
362 if (hdr.ioc_len < sizeof(struct obd_ioctl_data)) {
363 CERROR("User buffer too small for ioctl (%d)\n", hdr.ioc_len);
367 /* XXX allocate this more intelligently, using kmalloc when
369 OBD_VMALLOC(*buf, hdr.ioc_len);
371 CERROR("Cannot allocate control buffer of len %d\n",
376 data = (struct obd_ioctl_data *)*buf;
378 err = cfs_copy_from_user(*buf, (void *)arg, hdr.ioc_len);
380 OBD_VFREE(*buf, hdr.ioc_len);
384 if (obd_ioctl_is_invalid(data)) {
385 CERROR("ioctl not correctly formatted\n");
386 OBD_VFREE(*buf, hdr.ioc_len);
390 if (data->ioc_inllen1) {
391 data->ioc_inlbuf1 = &data->ioc_bulk[0];
392 offset += cfs_size_round(data->ioc_inllen1);
395 if (data->ioc_inllen2) {
396 data->ioc_inlbuf2 = &data->ioc_bulk[0] + offset;
397 offset += cfs_size_round(data->ioc_inllen2);
400 if (data->ioc_inllen3) {
401 data->ioc_inlbuf3 = &data->ioc_bulk[0] + offset;
402 offset += cfs_size_round(data->ioc_inllen3);
405 if (data->ioc_inllen4) {
406 data->ioc_inlbuf4 = &data->ioc_bulk[0] + offset;
412 static inline int obd_ioctl_popdata(void *arg, void *data, int len)
414 int err = cfs_copy_to_user(arg, data, len);
421 static inline void obd_ioctl_freedata(char *buf, int len)
431 * BSD ioctl description:
432 * #define IOC_V1 _IOR(g, n1, long)
433 * #define IOC_V2 _IOW(g, n2, long)
435 * ioctl(f, IOC_V1, arg);
436 * arg will be treated as a long value,
438 * ioctl(f, IOC_V2, arg)
439 * arg will be treated as a pointer, bsd will call
440 * copyin(buf, arg, sizeof(long))
442 * To make BSD ioctl handles argument correctly and simplely,
443 * we change _IOR to _IOWR so BSD will copyin obd_ioctl_data
444 * for us. Does this change affect Linux? (XXX Liang)
446 #define OBD_IOC_CREATE _IOWR('f', 101, OBD_IOC_DATA_TYPE)
447 #define OBD_IOC_DESTROY _IOW ('f', 104, OBD_IOC_DATA_TYPE)
448 #define OBD_IOC_PREALLOCATE _IOWR('f', 105, OBD_IOC_DATA_TYPE)
450 #define OBD_IOC_SETATTR _IOW ('f', 107, OBD_IOC_DATA_TYPE)
451 #define OBD_IOC_GETATTR _IOWR ('f', 108, OBD_IOC_DATA_TYPE)
452 #define OBD_IOC_READ _IOWR('f', 109, OBD_IOC_DATA_TYPE)
453 #define OBD_IOC_WRITE _IOWR('f', 110, OBD_IOC_DATA_TYPE)
456 #define OBD_IOC_STATFS _IOWR('f', 113, OBD_IOC_DATA_TYPE)
457 #define OBD_IOC_SYNC _IOW ('f', 114, OBD_IOC_DATA_TYPE)
458 #define OBD_IOC_READ2 _IOWR('f', 115, OBD_IOC_DATA_TYPE)
459 #define OBD_IOC_FORMAT _IOWR('f', 116, OBD_IOC_DATA_TYPE)
460 #define OBD_IOC_PARTITION _IOWR('f', 117, OBD_IOC_DATA_TYPE)
461 #define OBD_IOC_COPY _IOWR('f', 120, OBD_IOC_DATA_TYPE)
462 #define OBD_IOC_MIGR _IOWR('f', 121, OBD_IOC_DATA_TYPE)
463 #define OBD_IOC_PUNCH _IOWR('f', 122, OBD_IOC_DATA_TYPE)
465 #define OBD_IOC_MODULE_DEBUG _IOWR('f', 124, OBD_IOC_DATA_TYPE)
466 #define OBD_IOC_BRW_READ _IOWR('f', 125, OBD_IOC_DATA_TYPE)
467 #define OBD_IOC_BRW_WRITE _IOWR('f', 126, OBD_IOC_DATA_TYPE)
468 #define OBD_IOC_NAME2DEV _IOWR('f', 127, OBD_IOC_DATA_TYPE)
469 #define OBD_IOC_UUID2DEV _IOWR('f', 130, OBD_IOC_DATA_TYPE)
470 #define OBD_IOC_GETNAME _IOWR('f', 131, OBD_IOC_DATA_TYPE)
472 #define OBD_IOC_LOV_GET_CONFIG _IOWR('f', 132, OBD_IOC_DATA_TYPE)
473 #define OBD_IOC_CLIENT_RECOVER _IOW ('f', 133, OBD_IOC_DATA_TYPE)
474 #define OBD_IOC_PING_TARGET _IOW ('f', 136, OBD_IOC_DATA_TYPE)
476 #define OBD_IOC_DEC_FS_USE_COUNT _IO ('f', 139 )
477 #define OBD_IOC_NO_TRANSNO _IOW ('f', 140, OBD_IOC_DATA_TYPE)
478 #define OBD_IOC_SET_READONLY _IOW ('f', 141, OBD_IOC_DATA_TYPE)
479 #define OBD_IOC_ABORT_RECOVERY _IOR ('f', 142, OBD_IOC_DATA_TYPE)
481 #define OBD_IOC_ROOT_SQUASH _IOWR('f', 143, OBD_IOC_DATA_TYPE)
483 #define OBD_GET_VERSION _IOWR ('f', 144, OBD_IOC_DATA_TYPE)
485 #define OBD_IOC_GSS_SUPPORT _IOWR('f', 145, OBD_IOC_DATA_TYPE)
487 #define OBD_IOC_CLOSE_UUID _IOWR ('f', 147, OBD_IOC_DATA_TYPE)
489 #define OBD_IOC_CHANGELOG_SEND _IOW ('f', 148, OBD_IOC_DATA_TYPE)
490 #define OBD_IOC_GETDEVICE _IOWR ('f', 149, OBD_IOC_DATA_TYPE)
491 #define OBD_IOC_FID2PATH _IOWR ('f', 150, OBD_IOC_DATA_TYPE)
492 /* see <lustre/lustre_user.h> for ioctls 151-153 */
493 #define OBD_IOC_LOV_SETSTRIPE _IOW ('f', 154, OBD_IOC_DATA_TYPE)
494 #define OBD_IOC_LOV_GETSTRIPE _IOW ('f', 155, OBD_IOC_DATA_TYPE)
495 #define OBD_IOC_LOV_SETEA _IOW ('f', 156, OBD_IOC_DATA_TYPE)
496 /* see <lustre/lustre_user.h> for ioctls 157-159 */
497 #define OBD_IOC_QUOTACHECK _IOW ('f', 160, int)
498 #define OBD_IOC_POLL_QUOTACHECK _IOR ('f', 161, struct if_quotacheck *)
499 #define OBD_IOC_QUOTACTL _IOWR('f', 162, struct if_quotactl *)
500 /* see <lustre/lustre_user.h> for ioctls 163-175 */
501 #define OBD_IOC_CHANGELOG_REG _IOW ('f', 177, struct obd_ioctl_data)
502 #define OBD_IOC_CHANGELOG_DEREG _IOW ('f', 178, struct obd_ioctl_data)
503 #define OBD_IOC_CHANGELOG_CLEAR _IOW ('f', 179, struct obd_ioctl_data)
504 #define OBD_IOC_RECORD _IOWR('f', 180, OBD_IOC_DATA_TYPE)
505 #define OBD_IOC_ENDRECORD _IOWR('f', 181, OBD_IOC_DATA_TYPE)
506 #define OBD_IOC_PARSE _IOWR('f', 182, OBD_IOC_DATA_TYPE)
507 #define OBD_IOC_DORECORD _IOWR('f', 183, OBD_IOC_DATA_TYPE)
508 #define OBD_IOC_PROCESS_CFG _IOWR('f', 184, OBD_IOC_DATA_TYPE)
509 #define OBD_IOC_DUMP_LOG _IOWR('f', 185, OBD_IOC_DATA_TYPE)
510 #define OBD_IOC_CLEAR_LOG _IOWR('f', 186, OBD_IOC_DATA_TYPE)
511 #define OBD_IOC_PARAM _IOW ('f', 187, OBD_IOC_DATA_TYPE)
512 #define OBD_IOC_POOL _IOWR('f', 188, OBD_IOC_DATA_TYPE)
514 #define OBD_IOC_CATLOGLIST _IOWR('f', 190, OBD_IOC_DATA_TYPE)
515 #define OBD_IOC_LLOG_INFO _IOWR('f', 191, OBD_IOC_DATA_TYPE)
516 #define OBD_IOC_LLOG_PRINT _IOWR('f', 192, OBD_IOC_DATA_TYPE)
517 #define OBD_IOC_LLOG_CANCEL _IOWR('f', 193, OBD_IOC_DATA_TYPE)
518 #define OBD_IOC_LLOG_REMOVE _IOWR('f', 194, OBD_IOC_DATA_TYPE)
519 #define OBD_IOC_LLOG_CHECK _IOWR('f', 195, OBD_IOC_DATA_TYPE)
520 #define OBD_IOC_LLOG_CATINFO _IOWR('f', 196, OBD_IOC_DATA_TYPE)
522 #define ECHO_IOC_GET_STRIPE _IOWR('f', 200, OBD_IOC_DATA_TYPE)
523 #define ECHO_IOC_SET_STRIPE _IOWR('f', 201, OBD_IOC_DATA_TYPE)
524 #define ECHO_IOC_ENQUEUE _IOWR('f', 202, OBD_IOC_DATA_TYPE)
525 #define ECHO_IOC_CANCEL _IOWR('f', 203, OBD_IOC_DATA_TYPE)
527 #define OBD_IOC_GET_OBJ_VERSION _IOR('f', 210, OBD_IOC_DATA_TYPE)
529 /* XXX _IOWR('f', 250, long) has been defined in
530 * libcfs/include/libcfs/libcfs_private.h for debug, don't use it
533 /* Until such time as we get_info the per-stripe maximum from the OST,
534 * we define this to be 2T - 4k, which is the ext3 maxbytes. */
535 #define LUSTRE_STRIPE_MAXBYTES 0x1fffffff000ULL
537 /* Special values for remove LOV EA from disk */
538 #define LOVEA_DELETE_VALUES(size, count, offset) (size == 0 && count == 0 && \
539 offset == (typeof(offset))(-1))
541 /* #define POISON_BULK 0 */
544 * l_wait_event is a flexible sleeping function, permitting simple caller
545 * configuration of interrupt and timeout sensitivity along with actions to
546 * be performed in the event of either exception.
548 * The first form of usage looks like this:
550 * struct l_wait_info lwi = LWI_TIMEOUT_INTR(timeout, timeout_handler,
551 * intr_handler, callback_data);
552 * rc = l_wait_event(waitq, condition, &lwi);
554 * l_wait_event() makes the current process wait on 'waitq' until 'condition'
555 * is TRUE or a "killable" signal (SIGTERM, SIKGILL, SIGINT) is pending. It
556 * returns 0 to signify 'condition' is TRUE, but if a signal wakes it before
557 * 'condition' becomes true, it optionally calls the specified 'intr_handler'
558 * if not NULL, and returns -EINTR.
560 * If a non-zero timeout is specified, signals are ignored until the timeout
561 * has expired. At this time, if 'timeout_handler' is not NULL it is called.
562 * If it returns FALSE l_wait_event() continues to wait as described above with
563 * signals enabled. Otherwise it returns -ETIMEDOUT.
565 * LWI_INTR(intr_handler, callback_data) is shorthand for
566 * LWI_TIMEOUT_INTR(0, NULL, intr_handler, callback_data)
568 * The second form of usage looks like this:
570 * struct l_wait_info lwi = LWI_TIMEOUT(timeout, timeout_handler);
571 * rc = l_wait_event(waitq, condition, &lwi);
573 * This form is the same as the first except that it COMPLETELY IGNORES
574 * SIGNALS. The caller must therefore beware that if 'timeout' is zero, or if
575 * 'timeout_handler' is not NULL and returns FALSE, then the ONLY thing that
576 * can unblock the current process is 'condition' becoming TRUE.
578 * Another form of usage is:
579 * struct l_wait_info lwi = LWI_TIMEOUT_INTERVAL(timeout, interval,
581 * rc = l_wait_event(waitq, condition, &lwi);
582 * This is the same as previous case, but condition is checked once every
583 * 'interval' jiffies (if non-zero).
585 * Subtle synchronization point: this macro does *not* necessary takes
586 * wait-queue spin-lock before returning, and, hence, following idiom is safe
587 * ONLY when caller provides some external locking:
591 * l_wait_event(&obj->wq, ....); (1)
593 * wake_up(&obj->wq): (2)
594 * spin_lock(&q->lock); (2.1)
595 * __wake_up_common(q, ...); (2.2)
596 * spin_unlock(&q->lock, flags); (2.3)
598 * OBD_FREE_PTR(obj); (3)
600 * As l_wait_event() may "short-cut" execution and return without taking
601 * wait-queue spin-lock, some additional synchronization is necessary to
602 * guarantee that step (3) can begin only after (2.3) finishes.
604 * XXX nikita: some ptlrpc daemon threads have races of that sort.
607 static inline int back_to_sleep(void *arg)
612 #define LWI_ON_SIGNAL_NOOP ((void (*)(void *))(-1))
615 cfs_duration_t lwi_timeout;
616 cfs_duration_t lwi_interval;
618 int (*lwi_on_timeout)(void *);
619 void (*lwi_on_signal)(void *);
623 /* NB: LWI_TIMEOUT ignores signals completely */
624 #define LWI_TIMEOUT(time, cb, data) \
625 ((struct l_wait_info) { \
626 .lwi_timeout = time, \
627 .lwi_on_timeout = cb, \
628 .lwi_cb_data = data, \
630 .lwi_allow_intr = 0 \
633 #define LWI_TIMEOUT_INTERVAL(time, interval, cb, data) \
634 ((struct l_wait_info) { \
635 .lwi_timeout = time, \
636 .lwi_on_timeout = cb, \
637 .lwi_cb_data = data, \
638 .lwi_interval = interval, \
639 .lwi_allow_intr = 0 \
642 #define LWI_TIMEOUT_INTR(time, time_cb, sig_cb, data) \
643 ((struct l_wait_info) { \
644 .lwi_timeout = time, \
645 .lwi_on_timeout = time_cb, \
646 .lwi_on_signal = sig_cb, \
647 .lwi_cb_data = data, \
649 .lwi_allow_intr = 0 \
652 #define LWI_TIMEOUT_INTR_ALL(time, time_cb, sig_cb, data) \
653 ((struct l_wait_info) { \
654 .lwi_timeout = time, \
655 .lwi_on_timeout = time_cb, \
656 .lwi_on_signal = sig_cb, \
657 .lwi_cb_data = data, \
659 .lwi_allow_intr = 1 \
662 #define LWI_INTR(cb, data) LWI_TIMEOUT_INTR(0, NULL, cb, data)
667 * wait for @condition to become true, but no longer than timeout, specified
670 #define __l_wait_event(wq, condition, info, ret, l_add_wait) \
672 cfs_waitlink_t __wait; \
673 cfs_duration_t __timeout = info->lwi_timeout; \
674 cfs_sigset_t __blocked; \
675 int __allow_intr = info->lwi_allow_intr; \
681 cfs_waitlink_init(&__wait); \
682 l_add_wait(&wq, &__wait); \
684 /* Block all signals (just the non-fatal ones if no timeout). */ \
685 if (info->lwi_on_signal != NULL && (__timeout == 0 || __allow_intr)) \
686 __blocked = l_w_e_set_sigs(LUSTRE_FATAL_SIGS); \
688 __blocked = l_w_e_set_sigs(0); \
693 __wstate = info->lwi_on_signal != NULL && \
694 (__timeout == 0 || __allow_intr) ? \
695 CFS_TASK_INTERRUPTIBLE : CFS_TASK_UNINT; \
697 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE); \
702 if (__timeout == 0) { \
703 cfs_waitq_wait(&__wait, __wstate); \
705 cfs_duration_t interval = info->lwi_interval? \
706 min_t(cfs_duration_t, \
707 info->lwi_interval,__timeout):\
709 cfs_duration_t remaining = cfs_waitq_timedwait(&__wait,\
712 __timeout = cfs_time_sub(__timeout, \
713 cfs_time_sub(interval, remaining));\
714 if (__timeout == 0) { \
715 if (info->lwi_on_timeout == NULL || \
716 info->lwi_on_timeout(info->lwi_cb_data)) { \
720 /* Take signals after the timeout expires. */ \
721 if (info->lwi_on_signal != NULL) \
722 (void)l_w_e_set_sigs(LUSTRE_FATAL_SIGS); \
728 if (cfs_signal_pending()) { \
729 if (info->lwi_on_signal != NULL && \
730 (__timeout == 0 || __allow_intr)) { \
731 if (info->lwi_on_signal != LWI_ON_SIGNAL_NOOP) \
732 info->lwi_on_signal(info->lwi_cb_data);\
736 /* We have to do this here because some signals */ \
737 /* are not blockable - ie from strace(1). */ \
738 /* In these cases we want to schedule_timeout() */ \
739 /* again, because we don't want that to return */ \
740 /* -EINTR when the RPC actually succeeded. */ \
741 /* the RECALC_SIGPENDING below will deliver the */ \
742 /* signal properly. */ \
743 cfs_clear_sigpending(); \
747 cfs_block_sigs(__blocked); \
749 cfs_set_current_state(CFS_TASK_RUNNING); \
750 cfs_waitq_del(&wq, &__wait); \
753 #else /* !__KERNEL__ */
754 #define __l_wait_event(wq, condition, info, ret, l_add_wait) \
756 long __timeout = info->lwi_timeout; \
759 int __timed_out = 0; \
760 int __interval = obd_timeout; \
766 if (__timeout != 0) \
767 __then = time(NULL); \
769 if (__timeout && __timeout < __interval) \
770 __interval = __timeout; \
771 if (info->lwi_interval && info->lwi_interval < __interval) \
772 __interval = info->lwi_interval; \
774 while (!(condition)) { \
775 liblustre_wait_event(__interval); \
779 if (!__timed_out && info->lwi_timeout != 0) { \
780 __now = time(NULL); \
781 __timeout -= __now - __then; \
789 if (info->lwi_on_timeout == NULL || \
790 info->lwi_on_timeout(info->lwi_cb_data)) { \
798 #endif /* __KERNEL__ */
801 #define l_wait_event(wq, condition, info) \
804 struct l_wait_info *__info = (info); \
806 __l_wait_event(wq, condition, __info, \
807 __ret, cfs_waitq_add); \
811 #define l_wait_event_exclusive(wq, condition, info) \
814 struct l_wait_info *__info = (info); \
816 __l_wait_event(wq, condition, __info, \
817 __ret, cfs_waitq_add_exclusive); \
821 #define l_wait_event_exclusive_head(wq, condition, info) \
824 struct l_wait_info *__info = (info); \
826 __l_wait_event(wq, condition, __info, \
827 __ret, cfs_waitq_add_exclusive_head); \
831 #define l_wait_condition(wq, condition) \
833 struct l_wait_info lwi = { 0 }; \
834 l_wait_event(wq, condition, &lwi); \
837 #define l_wait_condition_exclusive(wq, condition) \
839 struct l_wait_info lwi = { 0 }; \
840 l_wait_event_exclusive(wq, condition, &lwi); \
843 #define l_wait_condition_exclusive_head(wq, condition) \
845 struct l_wait_info lwi = { 0 }; \
846 l_wait_event_exclusive_head(wq, condition, &lwi); \
850 #define LIBLUSTRE_CLIENT (0)
852 #define LIBLUSTRE_CLIENT (1)
857 #endif /* _LUSTRE_LIB_H */