1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * Basic Lustre library routines.
31 # include <asm/semaphore.h>
33 #include <linux/types.h>
34 #include <linux/portals_lib.h>
35 #include <linux/kp30.h> /* XXX just for LASSERT! */
36 #include <linux/lustre_idl.h>
39 #if BITS_PER_LONG > 32
52 struct ptlrpc_request;
57 #include <linux/lustre_ha.h>
59 int target_handle_connect(struct ptlrpc_request *req);
60 int target_handle_disconnect(struct ptlrpc_request *req);
61 int target_handle_reconnect(struct lustre_handle *conn, struct obd_export *exp,
63 int client_obd_connect(struct lustre_handle *conn, struct obd_device *obd,
64 obd_uuid_t cluuid, struct recovd_obd *recovd,
65 ptlrpc_recovery_cb_t recover);
66 int client_obd_disconnect(struct lustre_handle *conn);
67 int client_obd_setup(struct obd_device *obddev, obd_count len, void *buf);
68 int client_obd_cleanup(struct obd_device * obddev);
69 struct client_obd *client_conn2cli(struct lustre_handle *conn);
70 struct obd_device *client_tgtuuid2obd(char *tgtuuid);
72 int target_revoke_connection(struct recovd_data *rd, int phase);
77 struct task_struct *l_owner;
78 struct semaphore l_sem;
82 void l_lock_init(struct lustre_lock *);
83 void l_lock(struct lustre_lock *);
84 void l_unlock(struct lustre_lock *);
85 int l_has_lock(struct lustre_lock *);
87 #define CB_PHASE_START 12
88 #define CB_PHASE_FINISH 13
90 /* This list head doesn't need to be locked, because it's only manipulated by
91 * one thread at a time. */
93 struct list_head brw_desc_head; /* list of ptlrpc_bulk_desc */
94 wait_queue_head_t brw_waitq;
95 atomic_t brw_refcount;
98 int (*brw_callback)(struct obd_brw_set *, int phase);
104 void push_ctxt(struct obd_run_ctxt *save, struct obd_run_ctxt *new_ctx,
105 struct obd_ucred *cred);
106 void pop_ctxt(struct obd_run_ctxt *saved, struct obd_run_ctxt *new_ctx,
107 struct obd_ucred *cred);
108 struct dentry *simple_mkdir(struct dentry *dir, char *name, int mode);
109 struct dentry *simple_mknod(struct dentry *dir, char *name, int mode);
110 int lustre_fread(struct file *file, char *str, int len, loff_t *off);
111 int lustre_fwrite(struct file *file, const char *str, int len, loff_t *off);
112 int lustre_fsync(struct file *file);
114 static inline void l_dput(struct dentry *de)
116 if (!de || IS_ERR(de))
118 shrink_dcache_parent(de);
119 LASSERT(atomic_read(&de->d_count) > 0);
123 static inline void ll_sleep(int t)
125 set_current_state(TASK_INTERRUPTIBLE);
126 schedule_timeout(t * HZ);
127 set_current_state(TASK_RUNNING);
131 /* FIXME: This needs to validate pointers and cookies */
132 static inline void *lustre_handle2object(struct lustre_handle *handle)
135 return (void *)(unsigned long)(handle->addr);
139 static inline void ldlm_object2handle(void *object, struct lustre_handle *handle)
141 handle->addr = (__u64)(unsigned long)object;
144 #include <linux/portals_lib.h>
149 #define OBD_IOCTL_VERSION 0x00010001
151 struct obd_ioctl_data {
153 uint32_t ioc_version;
160 struct obdo ioc_obdo1;
161 struct obdo ioc_obdo2;
166 uint32_t ____padding;
168 /* buffers the kernel will treat as user pointers */
174 /* two inline buffers */
175 uint32_t ioc_inllen1;
177 uint32_t ioc_inllen2;
179 uint32_t ioc_inllen3;
185 struct obd_ioctl_hdr {
187 uint32_t ioc_version;
190 static inline int obd_ioctl_packlen(struct obd_ioctl_data *data)
192 int len = size_round(sizeof(struct obd_ioctl_data));
193 len += size_round(data->ioc_inllen1);
194 len += size_round(data->ioc_inllen2);
195 len += size_round(data->ioc_inllen3);
200 static inline int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
202 if (data->ioc_len > (1<<30)) {
203 printk("OBD ioctl: ioc_len larger than 1<<30\n");
206 if (data->ioc_inllen1 > (1<<30)) {
207 printk("OBD ioctl: ioc_inllen1 larger than 1<<30\n");
210 if (data->ioc_inllen2 > (1<<30)) {
211 printk("OBD ioctl: ioc_inllen2 larger than 1<<30\n");
215 if (data->ioc_inllen3 > (1<<30)) {
216 printk("OBD ioctl: ioc_inllen3 larger than 1<<30\n");
219 if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
220 printk("OBD ioctl: inlbuf1 pointer but 0 length\n");
223 if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
224 printk("OBD ioctl: inlbuf2 pointer but 0 length\n");
227 if (data->ioc_inlbuf3 && !data->ioc_inllen3) {
228 printk("OBD ioctl: inlbuf3 pointer but 0 length\n");
231 if (data->ioc_pbuf1 && !data->ioc_plen1) {
232 printk("OBD ioctl: pbuf1 pointer but 0 length\n");
235 if (data->ioc_pbuf2 && !data->ioc_plen2) {
236 printk("OBD ioctl: pbuf2 pointer but 0 length\n");
240 if (data->ioc_inllen1 && !data->ioc_inlbuf1) {
241 printk("OBD ioctl: inllen1 set but NULL pointer\n");
244 if (data->ioc_inllen2 && !data->ioc_inlbuf2) {
245 printk("OBD ioctl: inllen2 set but NULL pointer\n");
248 if (data->ioc_inllen3 && !data->ioc_inlbuf3) {
249 printk("OBD ioctl: inllen3 set but NULL pointer\n");
253 if (data->ioc_plen1 && !data->ioc_pbuf1) {
254 printk("OBD ioctl: plen1 set but NULL pointer\n");
257 if (data->ioc_plen2 && !data->ioc_pbuf2) {
258 printk("OBD ioctl: plen2 set but NULL pointer\n");
261 if (obd_ioctl_packlen(data) != data->ioc_len ) {
262 printk("OBD ioctl: packlen exceeds ioc_len\n");
266 if (data->ioc_inllen1 &&
267 data->ioc_bulk[data->ioc_inllen1 - 1] != '\0') {
268 printk("OBD ioctl: inlbuf1 not 0 terminated\n");
271 if (data->ioc_inllen2 &&
272 data->ioc_bulk[size_round(data->ioc_inllen1) + data->ioc_inllen2 - 1] != '\0') {
273 printk("OBD ioctl: inlbuf2 not 0 terminated\n");
276 if (data->ioc_inllen3 &&
277 data->ioc_bulk[size_round(data->ioc_inllen1) + size_round(data->ioc_inllen2)
278 + data->ioc_inllen3 - 1] != '\0') {
279 printk("OBD ioctl: inlbuf3 not 0 terminated\n");
287 static inline int obd_ioctl_pack(struct obd_ioctl_data *data, char **pbuf,
291 struct obd_ioctl_data *overlay;
292 data->ioc_len = obd_ioctl_packlen(data);
293 data->ioc_version = OBD_IOCTL_VERSION;
295 if (*pbuf && data->ioc_len > max)
298 *pbuf = malloc(data->ioc_len);
302 overlay = (struct obd_ioctl_data *)*pbuf;
303 memcpy(*pbuf, data, sizeof(*data));
305 ptr = overlay->ioc_bulk;
306 if (data->ioc_inlbuf1)
307 LOGL(data->ioc_inlbuf1, data->ioc_inllen1, ptr);
308 if (data->ioc_inlbuf2)
309 LOGL(data->ioc_inlbuf2, data->ioc_inllen2, ptr);
310 if (data->ioc_inlbuf3)
311 LOGL(data->ioc_inlbuf3, data->ioc_inllen3, ptr);
312 if (obd_ioctl_is_invalid(overlay))
318 static inline int obd_ioctl_unpack(struct obd_ioctl_data *data, char *pbuf,
322 struct obd_ioctl_data *overlay;
326 overlay = (struct obd_ioctl_data *)pbuf;
328 /* Preserve the caller's buffer pointers */
329 overlay->ioc_inlbuf1 = data->ioc_inlbuf1;
330 overlay->ioc_inlbuf2 = data->ioc_inlbuf2;
331 overlay->ioc_inlbuf3 = data->ioc_inlbuf3;
333 memcpy(data, pbuf, sizeof(*data));
335 ptr = overlay->ioc_bulk;
336 if (data->ioc_inlbuf1)
337 LOGU(data->ioc_inlbuf1, data->ioc_inllen1, ptr);
338 if (data->ioc_inlbuf2)
339 LOGU(data->ioc_inlbuf2, data->ioc_inllen2, ptr);
340 if (data->ioc_inlbuf3)
341 LOGU(data->ioc_inlbuf3, data->ioc_inllen3, ptr);
347 #include <linux/obd_support.h>
349 /* buffer MUST be at least the size of obd_ioctl_hdr */
350 static inline int obd_ioctl_getdata(char **buf, int *len, void *arg)
352 struct obd_ioctl_hdr hdr;
353 struct obd_ioctl_data *data;
357 err = copy_from_user(&hdr, (void *)arg, sizeof(hdr));
363 if (hdr.ioc_version != OBD_IOCTL_VERSION) {
364 printk("OBD: version mismatch kernel vs application\n");
368 if (hdr.ioc_len > 8192) {
369 printk("OBD: user buffer exceeds 8192 max buffer\n");
373 if (hdr.ioc_len < sizeof(struct obd_ioctl_data)) {
374 printk("OBD: user buffer too small for ioctl\n");
378 OBD_ALLOC(*buf, hdr.ioc_len);
380 CERROR("Cannot allocate control buffer of len %d\n",
385 data = (struct obd_ioctl_data *)*buf;
387 err = copy_from_user(*buf, (void *)arg, hdr.ioc_len);
393 if (obd_ioctl_is_invalid(data)) {
394 printk("OBD: ioctl not correctly formatted\n");
398 if (data->ioc_inllen1) {
399 data->ioc_inlbuf1 = &data->ioc_bulk[0];
402 if (data->ioc_inllen2) {
403 data->ioc_inlbuf2 = &data->ioc_bulk[0] +
404 size_round(data->ioc_inllen1);
407 if (data->ioc_inllen3) {
408 data->ioc_inlbuf3 = &data->ioc_bulk[0] +
409 size_round(data->ioc_inllen1) +
410 size_round(data->ioc_inllen2);
418 #define OBD_IOC_CREATE _IOR ('f', 101, long)
419 #define OBD_IOC_SETUP _IOW ('f', 102, long)
420 #define OBD_IOC_CLEANUP _IO ('f', 103 )
421 #define OBD_IOC_DESTROY _IOW ('f', 104, long)
422 #define OBD_IOC_PREALLOCATE _IOWR('f', 105, long)
424 #define OBD_IOC_SETATTR _IOW ('f', 107, long)
425 #define OBD_IOC_GETATTR _IOR ('f', 108, long)
426 #define OBD_IOC_READ _IOWR('f', 109, long)
427 #define OBD_IOC_WRITE _IOWR('f', 110, long)
428 #define OBD_IOC_CONNECT _IOR ('f', 111, long)
429 #define OBD_IOC_DISCONNECT _IOW ('f', 112, long)
430 #define OBD_IOC_STATFS _IOWR('f', 113, long)
431 #define OBD_IOC_SYNC _IOR ('f', 114, long)
432 #define OBD_IOC_READ2 _IOWR('f', 115, long)
433 #define OBD_IOC_FORMAT _IOWR('f', 116, long)
434 #define OBD_IOC_PARTITION _IOWR('f', 117, long)
435 #define OBD_IOC_ATTACH _IOWR('f', 118, long)
436 #define OBD_IOC_DETACH _IOWR('f', 119, long)
437 #define OBD_IOC_COPY _IOWR('f', 120, long)
438 #define OBD_IOC_MIGR _IOWR('f', 121, long)
439 #define OBD_IOC_PUNCH _IOWR('f', 122, long)
440 #define OBD_IOC_DEVICE _IOWR('f', 123, long)
441 #define OBD_IOC_MODULE_DEBUG _IOWR('f', 124, long)
442 #define OBD_IOC_BRW_READ _IOWR('f', 125, long)
443 #define OBD_IOC_BRW_WRITE _IOWR('f', 126, long)
444 #define OBD_IOC_NAME2DEV _IOWR('f', 127, long)
445 #define OBD_IOC_NEWDEV _IOWR('f', 128, long)
446 #define OBD_IOC_LIST _IOWR('f', 129, long)
447 #define OBD_IOC_UUID2DEV _IOWR('f', 130, long)
449 #define OBD_IOC_RECOVD_NEWCONN _IOWR('f', 131, long)
450 #define OBD_IOC_LOV_SET_CONFIG _IOWR('f', 132, long)
451 #define OBD_IOC_LOV_GET_CONFIG _IOWR('f', 133, long)
452 #define OBD_IOC_LOV_CONFIG OBD_IOC_LOV_SET_CONFIG
454 #define OBD_IOC_OPEN _IOWR('f', 134, long)
455 #define OBD_IOC_CLOSE _IOWR('f', 135, long)
457 #define OBD_IOC_RECOVD_FAILCONN _IOWR('f', 136, long)
459 #define OBD_IOC_DEC_FS_USE_COUNT _IO ('f', 139 )
461 #define OBD_GET_VERSION _IOWR ('f', 144, long)
464 * l_wait_event is a flexible sleeping function, permitting simple caller
465 * configuration of interrupt and timeout sensitivity along with actions to
466 * be performed in the event of either exception.
468 * Common usage looks like this:
470 * struct l_wait_info lwi = LWI_TIMEOUT_INTR(timeout, timeout_handler,
471 * intr_handler, callback_data);
472 * rc = l_wait_event(waitq, condition, &lwi);
474 * (LWI_TIMEOUT and LWI_INTR macros are available for timeout- and
475 * interrupt-only variants, respectively.)
477 * If a timeout is specified, the timeout_handler will be invoked in the event
478 * that the timeout expires before the process is awakened. (Note that any
479 * waking of the process will restart the timeout, even if the condition is
480 * not satisfied and the process immediately returns to sleep. This might be
481 * considered a bug.) If the timeout_handler returns non-zero, l_wait_event
482 * will return -ETIMEDOUT and the caller will continue. If the handler returns
483 * zero instead, the process will go back to sleep until it is awakened by the
484 * waitq or some similar mechanism, or an interrupt occurs (if the caller has
485 * asked for interrupts to be detected). The timeout will only fire once, so
486 * callers should take care that a timeout_handler which returns zero will take
487 * future steps to awaken the process. N.B. that these steps must include
488 * making the provided condition become true.
490 * If the interrupt flag (lwi_signals) is non-zero, then the process will be
491 * interruptible, and will be awakened by any "killable" signal (SIGTERM,
492 * SIGKILL or SIGINT). If a timeout is also specified, then the process will
493 * only become interruptible _after_ the timeout has expired, though it can be
494 * awakened by a signal that was delivered before the timeout and is still
495 * pending when the timeout expires. If a timeout is not specified, the process
496 * will be interruptible at all times during l_wait_event.
501 int (*lwi_on_timeout)(void *);
503 int (*lwi_on_signal)(void *); /* XXX return is ignored for now */
507 #define LWI_TIMEOUT(time, cb, data) \
508 ((struct l_wait_info) { \
510 lwi_on_timeout: cb, \
514 #define LWI_INTR(cb, data) \
515 ((struct l_wait_info) { \
521 #define LWI_TIMEOUT_INTR(time, time_cb, sig_cb, data) \
522 ((struct l_wait_info) { \
524 lwi_on_timeout: time_cb, \
526 lwi_on_signal: sig_cb, \
530 /* XXX this should be one mask-check */
531 #define l_killable_pending(task) \
532 (sigismember(&(task->pending.signal), SIGKILL) || \
533 sigismember(&(task->pending.signal), SIGINT) || \
534 sigismember(&(task->pending.signal), SIGTERM))
536 #define __l_wait_event(wq, condition, info, ret) \
538 wait_queue_t __wait; \
540 int __timed_out = 0; \
541 init_waitqueue_entry(&__wait, current); \
543 add_wait_queue(&wq, &__wait); \
544 if (info->lwi_signals && !info->lwi_timeout) \
545 __state = TASK_INTERRUPTIBLE; \
547 __state = TASK_UNINTERRUPTIBLE; \
549 set_current_state(__state); \
552 if (__state == TASK_INTERRUPTIBLE && l_killable_pending(current)) {\
553 if (info->lwi_on_signal) \
554 info->lwi_on_signal(info->lwi_cb_data); \
558 if (info->lwi_timeout && !__timed_out) { \
559 if (schedule_timeout(info->lwi_timeout) == 0) { \
561 if (!info->lwi_on_timeout || \
562 info->lwi_on_timeout(info->lwi_cb_data)) { \
566 /* We'll take signals after a timeout. */ \
567 if (info->lwi_signals) { \
568 __state = TASK_INTERRUPTIBLE; \
569 /* Check for a pending interrupt. */ \
570 if (info->lwi_signals && l_killable_pending(current)) {\
571 if (info->lwi_on_signal) \
572 info->lwi_on_signal(info->lwi_cb_data); \
582 current->state = TASK_RUNNING; \
583 remove_wait_queue(&wq, &__wait); \
586 #define l_wait_event(wq, condition, info) \
589 struct l_wait_info *__info = (info); \
591 __l_wait_event(wq, condition, __info, __ret); \
595 #endif /* _LUSTRE_LIB_H */