Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ALSA sequencer Client Manager | |
3 | * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl> | |
4 | * Jaroslav Kysela <perex@suse.cz> | |
5 | * Takashi Iwai <tiwai@suse.de> | |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <sound/driver.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/smp_lock.h> | |
27 | #include <linux/slab.h> | |
28 | #include <sound/core.h> | |
29 | #include <sound/minors.h> | |
30 | #include <linux/kmod.h> | |
31 | ||
32 | #include <sound/seq_kernel.h> | |
33 | #include "seq_clientmgr.h" | |
34 | #include "seq_memory.h" | |
35 | #include "seq_queue.h" | |
36 | #include "seq_timer.h" | |
37 | #include "seq_info.h" | |
38 | #include "seq_system.h" | |
39 | #include <sound/seq_device.h> | |
40 | #ifdef CONFIG_COMPAT | |
41 | #include <linux/compat.h> | |
42 | #endif | |
43 | ||
44 | /* Client Manager | |
45 | ||
46 | * this module handles the connections of userland and kernel clients | |
47 | * | |
48 | */ | |
49 | ||
aa1e77e6 CL |
50 | /* |
51 | * There are four ranges of client numbers (last two shared): | |
52 | * 0..15: global clients | |
53 | * 16..127: statically allocated client numbers for cards 0..27 | |
54 | * 128..191: dynamically allocated client numbers for cards 28..31 | |
55 | * 128..191: dynamically allocated client numbers for applications | |
56 | */ | |
57 | ||
58 | /* number of kernel non-card clients */ | |
59 | #define SNDRV_SEQ_GLOBAL_CLIENTS 16 | |
60 | /* clients per cards, for static clients */ | |
61 | #define SNDRV_SEQ_CLIENTS_PER_CARD 4 | |
62 | /* dynamically allocated client numbers (both kernel drivers and user space) */ | |
63 | #define SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN 128 | |
d001544d | 64 | |
1da177e4 LT |
65 | #define SNDRV_SEQ_LFLG_INPUT 0x0001 |
66 | #define SNDRV_SEQ_LFLG_OUTPUT 0x0002 | |
67 | #define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT) | |
68 | ||
69 | static DEFINE_SPINLOCK(clients_lock); | |
1a60d4c5 | 70 | static DEFINE_MUTEX(register_mutex); |
1da177e4 LT |
71 | |
72 | /* | |
73 | * client table | |
74 | */ | |
75 | static char clienttablock[SNDRV_SEQ_MAX_CLIENTS]; | |
c7e0b5bf TI |
76 | static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS]; |
77 | static struct snd_seq_usage client_usage; | |
1da177e4 LT |
78 | |
79 | /* | |
80 | * prototypes | |
81 | */ | |
c7e0b5bf TI |
82 | static int bounce_error_event(struct snd_seq_client *client, |
83 | struct snd_seq_event *event, | |
84 | int err, int atomic, int hop); | |
85 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, | |
86 | struct snd_seq_event *event, | |
87 | int filter, int atomic, int hop); | |
1da177e4 LT |
88 | |
89 | /* | |
90 | */ | |
91 | ||
92 | static inline mm_segment_t snd_enter_user(void) | |
93 | { | |
94 | mm_segment_t fs = get_fs(); | |
95 | set_fs(get_ds()); | |
96 | return fs; | |
97 | } | |
98 | ||
99 | static inline void snd_leave_user(mm_segment_t fs) | |
100 | { | |
101 | set_fs(fs); | |
102 | } | |
103 | ||
104 | /* | |
105 | */ | |
106 | static inline unsigned short snd_seq_file_flags(struct file *file) | |
107 | { | |
108 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
109 | case FMODE_WRITE: | |
110 | return SNDRV_SEQ_LFLG_OUTPUT; | |
111 | case FMODE_READ: | |
112 | return SNDRV_SEQ_LFLG_INPUT; | |
113 | default: | |
114 | return SNDRV_SEQ_LFLG_OPEN; | |
115 | } | |
116 | } | |
117 | ||
c7e0b5bf | 118 | static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client) |
1da177e4 LT |
119 | { |
120 | return snd_seq_total_cells(client->pool) > 0; | |
121 | } | |
122 | ||
123 | /* return pointer to client structure for specified id */ | |
c7e0b5bf | 124 | static struct snd_seq_client *clientptr(int clientid) |
1da177e4 LT |
125 | { |
126 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { | |
c7e0b5bf TI |
127 | snd_printd("Seq: oops. Trying to get pointer to client %d\n", |
128 | clientid); | |
1da177e4 LT |
129 | return NULL; |
130 | } | |
131 | return clienttab[clientid]; | |
132 | } | |
133 | ||
134 | extern int seq_client_load[]; | |
135 | ||
c7e0b5bf | 136 | struct snd_seq_client *snd_seq_client_use_ptr(int clientid) |
1da177e4 LT |
137 | { |
138 | unsigned long flags; | |
c7e0b5bf | 139 | struct snd_seq_client *client; |
1da177e4 LT |
140 | |
141 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { | |
c7e0b5bf TI |
142 | snd_printd("Seq: oops. Trying to get pointer to client %d\n", |
143 | clientid); | |
1da177e4 LT |
144 | return NULL; |
145 | } | |
146 | spin_lock_irqsave(&clients_lock, flags); | |
147 | client = clientptr(clientid); | |
148 | if (client) | |
149 | goto __lock; | |
150 | if (clienttablock[clientid]) { | |
151 | spin_unlock_irqrestore(&clients_lock, flags); | |
152 | return NULL; | |
153 | } | |
154 | spin_unlock_irqrestore(&clients_lock, flags); | |
155 | #ifdef CONFIG_KMOD | |
156 | if (!in_interrupt() && current->fs->root) { | |
aa1e77e6 | 157 | static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS]; |
1da177e4 | 158 | static char card_requested[SNDRV_CARDS]; |
aa1e77e6 | 159 | if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) { |
1da177e4 LT |
160 | int idx; |
161 | ||
162 | if (! client_requested[clientid] && current->fs->root) { | |
163 | client_requested[clientid] = 1; | |
aa1e77e6 | 164 | for (idx = 0; idx < 15; idx++) { |
1da177e4 LT |
165 | if (seq_client_load[idx] < 0) |
166 | break; | |
167 | if (seq_client_load[idx] == clientid) { | |
c7e0b5bf TI |
168 | request_module("snd-seq-client-%i", |
169 | clientid); | |
1da177e4 LT |
170 | break; |
171 | } | |
172 | } | |
173 | } | |
aa1e77e6 CL |
174 | } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) { |
175 | int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) / | |
176 | SNDRV_SEQ_CLIENTS_PER_CARD; | |
1da177e4 LT |
177 | if (card < snd_ecards_limit) { |
178 | if (! card_requested[card]) { | |
179 | card_requested[card] = 1; | |
180 | snd_request_card(card); | |
181 | } | |
182 | snd_seq_device_load_drivers(); | |
183 | } | |
184 | } | |
185 | spin_lock_irqsave(&clients_lock, flags); | |
186 | client = clientptr(clientid); | |
187 | if (client) | |
188 | goto __lock; | |
189 | spin_unlock_irqrestore(&clients_lock, flags); | |
190 | } | |
191 | #endif | |
192 | return NULL; | |
193 | ||
194 | __lock: | |
195 | snd_use_lock_use(&client->use_lock); | |
196 | spin_unlock_irqrestore(&clients_lock, flags); | |
197 | return client; | |
198 | } | |
199 | ||
c7e0b5bf | 200 | static void usage_alloc(struct snd_seq_usage *res, int num) |
1da177e4 LT |
201 | { |
202 | res->cur += num; | |
203 | if (res->cur > res->peak) | |
204 | res->peak = res->cur; | |
205 | } | |
206 | ||
c7e0b5bf | 207 | static void usage_free(struct snd_seq_usage *res, int num) |
1da177e4 LT |
208 | { |
209 | res->cur -= num; | |
210 | } | |
211 | ||
212 | /* initialise data structures */ | |
213 | int __init client_init_data(void) | |
214 | { | |
215 | /* zap out the client table */ | |
216 | memset(&clienttablock, 0, sizeof(clienttablock)); | |
217 | memset(&clienttab, 0, sizeof(clienttab)); | |
218 | return 0; | |
219 | } | |
220 | ||
221 | ||
aa1e77e6 | 222 | static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) |
1da177e4 LT |
223 | { |
224 | unsigned long flags; | |
225 | int c; | |
c7e0b5bf | 226 | struct snd_seq_client *client; |
1da177e4 LT |
227 | |
228 | /* init client data */ | |
ecca82b4 | 229 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
1da177e4 LT |
230 | if (client == NULL) |
231 | return NULL; | |
232 | client->pool = snd_seq_pool_new(poolsize); | |
233 | if (client->pool == NULL) { | |
234 | kfree(client); | |
235 | return NULL; | |
236 | } | |
237 | client->type = NO_CLIENT; | |
238 | snd_use_lock_init(&client->use_lock); | |
239 | rwlock_init(&client->ports_lock); | |
1a60d4c5 | 240 | mutex_init(&client->ports_mutex); |
1da177e4 LT |
241 | INIT_LIST_HEAD(&client->ports_list_head); |
242 | ||
243 | /* find free slot in the client table */ | |
244 | spin_lock_irqsave(&clients_lock, flags); | |
245 | if (client_index < 0) { | |
aa1e77e6 CL |
246 | for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN; |
247 | c < SNDRV_SEQ_MAX_CLIENTS; | |
248 | c++) { | |
1da177e4 LT |
249 | if (clienttab[c] || clienttablock[c]) |
250 | continue; | |
251 | clienttab[client->number = c] = client; | |
252 | spin_unlock_irqrestore(&clients_lock, flags); | |
253 | return client; | |
254 | } | |
255 | } else { | |
256 | if (clienttab[client_index] == NULL && !clienttablock[client_index]) { | |
257 | clienttab[client->number = client_index] = client; | |
258 | spin_unlock_irqrestore(&clients_lock, flags); | |
259 | return client; | |
260 | } | |
261 | } | |
262 | spin_unlock_irqrestore(&clients_lock, flags); | |
263 | snd_seq_pool_delete(&client->pool); | |
264 | kfree(client); | |
265 | return NULL; /* no free slot found or busy, return failure code */ | |
266 | } | |
267 | ||
268 | ||
c7e0b5bf | 269 | static int seq_free_client1(struct snd_seq_client *client) |
1da177e4 LT |
270 | { |
271 | unsigned long flags; | |
272 | ||
273 | snd_assert(client != NULL, return -EINVAL); | |
274 | snd_seq_delete_all_ports(client); | |
275 | snd_seq_queue_client_leave(client->number); | |
276 | spin_lock_irqsave(&clients_lock, flags); | |
277 | clienttablock[client->number] = 1; | |
278 | clienttab[client->number] = NULL; | |
279 | spin_unlock_irqrestore(&clients_lock, flags); | |
280 | snd_use_lock_sync(&client->use_lock); | |
281 | snd_seq_queue_client_termination(client->number); | |
282 | if (client->pool) | |
283 | snd_seq_pool_delete(&client->pool); | |
284 | spin_lock_irqsave(&clients_lock, flags); | |
285 | clienttablock[client->number] = 0; | |
286 | spin_unlock_irqrestore(&clients_lock, flags); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | ||
c7e0b5bf | 291 | static void seq_free_client(struct snd_seq_client * client) |
1da177e4 | 292 | { |
1a60d4c5 | 293 | mutex_lock(®ister_mutex); |
1da177e4 LT |
294 | switch (client->type) { |
295 | case NO_CLIENT: | |
c7e0b5bf TI |
296 | snd_printk(KERN_WARNING "Seq: Trying to free unused client %d\n", |
297 | client->number); | |
1da177e4 LT |
298 | break; |
299 | case USER_CLIENT: | |
300 | case KERNEL_CLIENT: | |
301 | seq_free_client1(client); | |
302 | usage_free(&client_usage, 1); | |
303 | break; | |
304 | ||
305 | default: | |
c7e0b5bf TI |
306 | snd_printk(KERN_ERR "Seq: Trying to free client %d with undefined type = %d\n", |
307 | client->number, client->type); | |
1da177e4 | 308 | } |
1a60d4c5 | 309 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
310 | |
311 | snd_seq_system_client_ev_client_exit(client->number); | |
312 | } | |
313 | ||
314 | ||
315 | ||
316 | /* -------------------------------------------------------- */ | |
317 | ||
318 | /* create a user client */ | |
319 | static int snd_seq_open(struct inode *inode, struct file *file) | |
320 | { | |
321 | int c, mode; /* client id */ | |
c7e0b5bf TI |
322 | struct snd_seq_client *client; |
323 | struct snd_seq_user_client *user; | |
1da177e4 | 324 | |
1a60d4c5 | 325 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 | 326 | return -ERESTARTSYS; |
aa1e77e6 | 327 | client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS); |
1da177e4 | 328 | if (client == NULL) { |
1a60d4c5 | 329 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
330 | return -ENOMEM; /* failure code */ |
331 | } | |
332 | ||
333 | mode = snd_seq_file_flags(file); | |
334 | if (mode & SNDRV_SEQ_LFLG_INPUT) | |
335 | client->accept_input = 1; | |
336 | if (mode & SNDRV_SEQ_LFLG_OUTPUT) | |
337 | client->accept_output = 1; | |
338 | ||
339 | user = &client->data.user; | |
340 | user->fifo = NULL; | |
341 | user->fifo_pool_size = 0; | |
342 | ||
343 | if (mode & SNDRV_SEQ_LFLG_INPUT) { | |
344 | user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS; | |
345 | user->fifo = snd_seq_fifo_new(user->fifo_pool_size); | |
346 | if (user->fifo == NULL) { | |
347 | seq_free_client1(client); | |
348 | kfree(client); | |
1a60d4c5 | 349 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
350 | return -ENOMEM; |
351 | } | |
352 | } | |
353 | ||
354 | usage_alloc(&client_usage, 1); | |
355 | client->type = USER_CLIENT; | |
1a60d4c5 | 356 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
357 | |
358 | c = client->number; | |
359 | file->private_data = client; | |
360 | ||
361 | /* fill client data */ | |
362 | user->file = file; | |
363 | sprintf(client->name, "Client-%d", c); | |
364 | ||
365 | /* make others aware this new client */ | |
366 | snd_seq_system_client_ev_client_start(c); | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | /* delete a user client */ | |
372 | static int snd_seq_release(struct inode *inode, struct file *file) | |
373 | { | |
c7e0b5bf | 374 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
375 | |
376 | if (client) { | |
377 | seq_free_client(client); | |
378 | if (client->data.user.fifo) | |
379 | snd_seq_fifo_delete(&client->data.user.fifo); | |
380 | kfree(client); | |
381 | } | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
386 | ||
387 | /* handle client read() */ | |
388 | /* possible error values: | |
389 | * -ENXIO invalid client or file open mode | |
390 | * -ENOSPC FIFO overflow (the flag is cleared after this error report) | |
391 | * -EINVAL no enough user-space buffer to write the whole event | |
392 | * -EFAULT seg. fault during copy to user space | |
393 | */ | |
c7e0b5bf TI |
394 | static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count, |
395 | loff_t *offset) | |
1da177e4 | 396 | { |
c7e0b5bf TI |
397 | struct snd_seq_client *client = file->private_data; |
398 | struct snd_seq_fifo *fifo; | |
1da177e4 LT |
399 | int err; |
400 | long result = 0; | |
c7e0b5bf | 401 | struct snd_seq_event_cell *cell; |
1da177e4 LT |
402 | |
403 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT)) | |
404 | return -ENXIO; | |
405 | ||
406 | if (!access_ok(VERIFY_WRITE, buf, count)) | |
407 | return -EFAULT; | |
408 | ||
409 | /* check client structures are in place */ | |
410 | snd_assert(client != NULL, return -ENXIO); | |
411 | ||
412 | if (!client->accept_input || (fifo = client->data.user.fifo) == NULL) | |
413 | return -ENXIO; | |
414 | ||
415 | if (atomic_read(&fifo->overflow) > 0) { | |
416 | /* buffer overflow is detected */ | |
417 | snd_seq_fifo_clear(fifo); | |
418 | /* return error code */ | |
419 | return -ENOSPC; | |
420 | } | |
421 | ||
422 | cell = NULL; | |
423 | err = 0; | |
424 | snd_seq_fifo_lock(fifo); | |
425 | ||
426 | /* while data available in queue */ | |
c7e0b5bf | 427 | while (count >= sizeof(struct snd_seq_event)) { |
1da177e4 LT |
428 | int nonblock; |
429 | ||
430 | nonblock = (file->f_flags & O_NONBLOCK) || result > 0; | |
431 | if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) { | |
432 | break; | |
433 | } | |
434 | if (snd_seq_ev_is_variable(&cell->event)) { | |
c7e0b5bf | 435 | struct snd_seq_event tmpev; |
1da177e4 LT |
436 | tmpev = cell->event; |
437 | tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK; | |
c7e0b5bf | 438 | if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) { |
1da177e4 LT |
439 | err = -EFAULT; |
440 | break; | |
441 | } | |
c7e0b5bf TI |
442 | count -= sizeof(struct snd_seq_event); |
443 | buf += sizeof(struct snd_seq_event); | |
4d23359b CL |
444 | err = snd_seq_expand_var_event(&cell->event, count, |
445 | (char __force *)buf, 0, | |
c7e0b5bf | 446 | sizeof(struct snd_seq_event)); |
1da177e4 LT |
447 | if (err < 0) |
448 | break; | |
449 | result += err; | |
450 | count -= err; | |
451 | buf += err; | |
452 | } else { | |
c7e0b5bf | 453 | if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) { |
1da177e4 LT |
454 | err = -EFAULT; |
455 | break; | |
456 | } | |
c7e0b5bf TI |
457 | count -= sizeof(struct snd_seq_event); |
458 | buf += sizeof(struct snd_seq_event); | |
1da177e4 LT |
459 | } |
460 | snd_seq_cell_free(cell); | |
461 | cell = NULL; /* to be sure */ | |
c7e0b5bf | 462 | result += sizeof(struct snd_seq_event); |
1da177e4 LT |
463 | } |
464 | ||
465 | if (err < 0) { | |
466 | if (cell) | |
467 | snd_seq_fifo_cell_putback(fifo, cell); | |
468 | if (err == -EAGAIN && result > 0) | |
469 | err = 0; | |
470 | } | |
471 | snd_seq_fifo_unlock(fifo); | |
472 | ||
473 | return (err < 0) ? err : result; | |
474 | } | |
475 | ||
476 | ||
477 | /* | |
478 | * check access permission to the port | |
479 | */ | |
c7e0b5bf | 480 | static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags) |
1da177e4 LT |
481 | { |
482 | if ((port->capability & flags) != flags) | |
483 | return 0; | |
484 | return flags; | |
485 | } | |
486 | ||
487 | /* | |
488 | * check if the destination client is available, and return the pointer | |
489 | * if filter is non-zero, client filter bitmap is tested. | |
490 | */ | |
c7e0b5bf TI |
491 | static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event, |
492 | int filter) | |
1da177e4 | 493 | { |
c7e0b5bf | 494 | struct snd_seq_client *dest; |
1da177e4 LT |
495 | |
496 | dest = snd_seq_client_use_ptr(event->dest.client); | |
497 | if (dest == NULL) | |
498 | return NULL; | |
499 | if (! dest->accept_input) | |
500 | goto __not_avail; | |
501 | if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) && | |
502 | ! test_bit(event->type, dest->event_filter)) | |
503 | goto __not_avail; | |
504 | if (filter && !(dest->filter & filter)) | |
505 | goto __not_avail; | |
506 | ||
507 | return dest; /* ok - accessible */ | |
508 | __not_avail: | |
509 | snd_seq_client_unlock(dest); | |
510 | return NULL; | |
511 | } | |
512 | ||
513 | ||
514 | /* | |
515 | * Return the error event. | |
516 | * | |
517 | * If the receiver client is a user client, the original event is | |
518 | * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If | |
519 | * the original event is also variable length, the external data is | |
520 | * copied after the event record. | |
521 | * If the receiver client is a kernel client, the original event is | |
522 | * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra | |
523 | * kmalloc. | |
524 | */ | |
c7e0b5bf TI |
525 | static int bounce_error_event(struct snd_seq_client *client, |
526 | struct snd_seq_event *event, | |
1da177e4 LT |
527 | int err, int atomic, int hop) |
528 | { | |
c7e0b5bf | 529 | struct snd_seq_event bounce_ev; |
1da177e4 LT |
530 | int result; |
531 | ||
532 | if (client == NULL || | |
533 | ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) || | |
534 | ! client->accept_input) | |
535 | return 0; /* ignored */ | |
536 | ||
537 | /* set up quoted error */ | |
538 | memset(&bounce_ev, 0, sizeof(bounce_ev)); | |
539 | bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR; | |
540 | bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED; | |
541 | bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT; | |
542 | bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; | |
543 | bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE; | |
544 | bounce_ev.dest.client = client->number; | |
545 | bounce_ev.dest.port = event->source.port; | |
546 | bounce_ev.data.quote.origin = event->dest; | |
547 | bounce_ev.data.quote.event = event; | |
548 | bounce_ev.data.quote.value = -err; /* use positive value */ | |
549 | result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1); | |
550 | if (result < 0) { | |
551 | client->event_lost++; | |
552 | return result; | |
553 | } | |
554 | ||
555 | return result; | |
556 | } | |
557 | ||
558 | ||
559 | /* | |
560 | * rewrite the time-stamp of the event record with the curren time | |
561 | * of the given queue. | |
562 | * return non-zero if updated. | |
563 | */ | |
c7e0b5bf TI |
564 | static int update_timestamp_of_queue(struct snd_seq_event *event, |
565 | int queue, int real_time) | |
1da177e4 | 566 | { |
c7e0b5bf | 567 | struct snd_seq_queue *q; |
1da177e4 LT |
568 | |
569 | q = queueptr(queue); | |
570 | if (! q) | |
571 | return 0; | |
572 | event->queue = queue; | |
573 | event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK; | |
574 | if (real_time) { | |
575 | event->time.time = snd_seq_timer_get_cur_time(q->timer); | |
576 | event->flags |= SNDRV_SEQ_TIME_STAMP_REAL; | |
577 | } else { | |
578 | event->time.tick = snd_seq_timer_get_cur_tick(q->timer); | |
579 | event->flags |= SNDRV_SEQ_TIME_STAMP_TICK; | |
580 | } | |
581 | queuefree(q); | |
582 | return 1; | |
583 | } | |
584 | ||
585 | ||
586 | /* | |
587 | * deliver an event to the specified destination. | |
588 | * if filter is non-zero, client filter bitmap is tested. | |
589 | * | |
590 | * RETURN VALUE: 0 : if succeeded | |
591 | * <0 : error | |
592 | */ | |
c7e0b5bf TI |
593 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
594 | struct snd_seq_event *event, | |
1da177e4 LT |
595 | int filter, int atomic, int hop) |
596 | { | |
c7e0b5bf TI |
597 | struct snd_seq_client *dest = NULL; |
598 | struct snd_seq_client_port *dest_port = NULL; | |
1da177e4 LT |
599 | int result = -ENOENT; |
600 | int direct; | |
601 | ||
602 | direct = snd_seq_ev_is_direct(event); | |
603 | ||
604 | dest = get_event_dest_client(event, filter); | |
605 | if (dest == NULL) | |
606 | goto __skip; | |
607 | dest_port = snd_seq_port_use_ptr(dest, event->dest.port); | |
608 | if (dest_port == NULL) | |
609 | goto __skip; | |
610 | ||
611 | /* check permission */ | |
612 | if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) { | |
613 | result = -EPERM; | |
614 | goto __skip; | |
615 | } | |
616 | ||
617 | if (dest_port->timestamping) | |
618 | update_timestamp_of_queue(event, dest_port->time_queue, | |
619 | dest_port->time_real); | |
620 | ||
621 | switch (dest->type) { | |
622 | case USER_CLIENT: | |
623 | if (dest->data.user.fifo) | |
624 | result = snd_seq_fifo_event_in(dest->data.user.fifo, event); | |
625 | break; | |
626 | ||
627 | case KERNEL_CLIENT: | |
628 | if (dest_port->event_input == NULL) | |
629 | break; | |
c7e0b5bf TI |
630 | result = dest_port->event_input(event, direct, |
631 | dest_port->private_data, | |
632 | atomic, hop); | |
1da177e4 LT |
633 | break; |
634 | default: | |
635 | break; | |
636 | } | |
637 | ||
638 | __skip: | |
639 | if (dest_port) | |
640 | snd_seq_port_unlock(dest_port); | |
641 | if (dest) | |
642 | snd_seq_client_unlock(dest); | |
643 | ||
644 | if (result < 0 && !direct) { | |
645 | result = bounce_error_event(client, event, result, atomic, hop); | |
646 | } | |
647 | return result; | |
648 | } | |
649 | ||
650 | ||
651 | /* | |
652 | * send the event to all subscribers: | |
653 | */ | |
c7e0b5bf TI |
654 | static int deliver_to_subscribers(struct snd_seq_client *client, |
655 | struct snd_seq_event *event, | |
1da177e4 LT |
656 | int atomic, int hop) |
657 | { | |
c7e0b5bf | 658 | struct snd_seq_subscribers *subs; |
1da177e4 | 659 | int err = 0, num_ev = 0; |
c7e0b5bf TI |
660 | struct snd_seq_event event_saved; |
661 | struct snd_seq_client_port *src_port; | |
1da177e4 | 662 | struct list_head *p; |
c7e0b5bf | 663 | struct snd_seq_port_subs_info *grp; |
1da177e4 LT |
664 | |
665 | src_port = snd_seq_port_use_ptr(client, event->source.port); | |
666 | if (src_port == NULL) | |
667 | return -EINVAL; /* invalid source port */ | |
668 | /* save original event record */ | |
669 | event_saved = *event; | |
670 | grp = &src_port->c_src; | |
671 | ||
672 | /* lock list */ | |
673 | if (atomic) | |
674 | read_lock(&grp->list_lock); | |
675 | else | |
676 | down_read(&grp->list_mutex); | |
677 | list_for_each(p, &grp->list_head) { | |
c7e0b5bf | 678 | subs = list_entry(p, struct snd_seq_subscribers, src_list); |
1da177e4 LT |
679 | event->dest = subs->info.dest; |
680 | if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) | |
681 | /* convert time according to flag with subscription */ | |
682 | update_timestamp_of_queue(event, subs->info.queue, | |
683 | subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL); | |
684 | err = snd_seq_deliver_single_event(client, event, | |
685 | 0, atomic, hop); | |
686 | if (err < 0) | |
687 | break; | |
688 | num_ev++; | |
689 | /* restore original event record */ | |
690 | *event = event_saved; | |
691 | } | |
692 | if (atomic) | |
693 | read_unlock(&grp->list_lock); | |
694 | else | |
695 | up_read(&grp->list_mutex); | |
696 | *event = event_saved; /* restore */ | |
697 | snd_seq_port_unlock(src_port); | |
698 | return (err < 0) ? err : num_ev; | |
699 | } | |
700 | ||
701 | ||
702 | #ifdef SUPPORT_BROADCAST | |
703 | /* | |
704 | * broadcast to all ports: | |
705 | */ | |
c7e0b5bf TI |
706 | static int port_broadcast_event(struct snd_seq_client *client, |
707 | struct snd_seq_event *event, | |
1da177e4 LT |
708 | int atomic, int hop) |
709 | { | |
710 | int num_ev = 0, err = 0; | |
c7e0b5bf | 711 | struct snd_seq_client *dest_client; |
1da177e4 LT |
712 | struct list_head *p; |
713 | ||
714 | dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST); | |
715 | if (dest_client == NULL) | |
716 | return 0; /* no matching destination */ | |
717 | ||
718 | read_lock(&dest_client->ports_lock); | |
719 | list_for_each(p, &dest_client->ports_list_head) { | |
c7e0b5bf | 720 | struct snd_seq_client_port *port = list_entry(p, struct snd_seq_client_port, list); |
1da177e4 LT |
721 | event->dest.port = port->addr.port; |
722 | /* pass NULL as source client to avoid error bounce */ | |
723 | err = snd_seq_deliver_single_event(NULL, event, | |
724 | SNDRV_SEQ_FILTER_BROADCAST, | |
725 | atomic, hop); | |
726 | if (err < 0) | |
727 | break; | |
728 | num_ev++; | |
729 | } | |
730 | read_unlock(&dest_client->ports_lock); | |
731 | snd_seq_client_unlock(dest_client); | |
732 | event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */ | |
733 | return (err < 0) ? err : num_ev; | |
734 | } | |
735 | ||
736 | /* | |
737 | * send the event to all clients: | |
738 | * if destination port is also ADDRESS_BROADCAST, deliver to all ports. | |
739 | */ | |
c7e0b5bf TI |
740 | static int broadcast_event(struct snd_seq_client *client, |
741 | struct snd_seq_event *event, int atomic, int hop) | |
1da177e4 LT |
742 | { |
743 | int err = 0, num_ev = 0; | |
744 | int dest; | |
c7e0b5bf | 745 | struct snd_seq_addr addr; |
1da177e4 LT |
746 | |
747 | addr = event->dest; /* save */ | |
748 | ||
749 | for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) { | |
750 | /* don't send to itself */ | |
751 | if (dest == client->number) | |
752 | continue; | |
753 | event->dest.client = dest; | |
754 | event->dest.port = addr.port; | |
755 | if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST) | |
756 | err = port_broadcast_event(client, event, atomic, hop); | |
757 | else | |
758 | /* pass NULL as source client to avoid error bounce */ | |
759 | err = snd_seq_deliver_single_event(NULL, event, | |
760 | SNDRV_SEQ_FILTER_BROADCAST, | |
761 | atomic, hop); | |
762 | if (err < 0) | |
763 | break; | |
764 | num_ev += err; | |
765 | } | |
766 | event->dest = addr; /* restore */ | |
767 | return (err < 0) ? err : num_ev; | |
768 | } | |
769 | ||
770 | ||
771 | /* multicast - not supported yet */ | |
c7e0b5bf | 772 | static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event, |
1da177e4 LT |
773 | int atomic, int hop) |
774 | { | |
775 | snd_printd("seq: multicast not supported yet.\n"); | |
776 | return 0; /* ignored */ | |
777 | } | |
778 | #endif /* SUPPORT_BROADCAST */ | |
779 | ||
780 | ||
781 | /* deliver an event to the destination port(s). | |
782 | * if the event is to subscribers or broadcast, the event is dispatched | |
783 | * to multiple targets. | |
784 | * | |
785 | * RETURN VALUE: n > 0 : the number of delivered events. | |
786 | * n == 0 : the event was not passed to any client. | |
787 | * n < 0 : error - event was not processed. | |
788 | */ | |
c7e0b5bf | 789 | static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event, |
1da177e4 LT |
790 | int atomic, int hop) |
791 | { | |
792 | int result; | |
793 | ||
794 | hop++; | |
795 | if (hop >= SNDRV_SEQ_MAX_HOPS) { | |
796 | snd_printd("too long delivery path (%d:%d->%d:%d)\n", | |
797 | event->source.client, event->source.port, | |
798 | event->dest.client, event->dest.port); | |
799 | return -EMLINK; | |
800 | } | |
801 | ||
802 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS || | |
803 | event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) | |
804 | result = deliver_to_subscribers(client, event, atomic, hop); | |
805 | #ifdef SUPPORT_BROADCAST | |
806 | else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST || | |
807 | event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST) | |
808 | result = broadcast_event(client, event, atomic, hop); | |
809 | else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS) | |
810 | result = multicast_event(client, event, atomic, hop); | |
811 | else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST) | |
812 | result = port_broadcast_event(client, event, atomic, hop); | |
813 | #endif | |
814 | else | |
815 | result = snd_seq_deliver_single_event(client, event, 0, atomic, hop); | |
816 | ||
817 | return result; | |
818 | } | |
819 | ||
820 | /* | |
821 | * dispatch an event cell: | |
822 | * This function is called only from queue check routines in timer | |
823 | * interrupts or after enqueued. | |
824 | * The event cell shall be released or re-queued in this function. | |
825 | * | |
826 | * RETURN VALUE: n > 0 : the number of delivered events. | |
827 | * n == 0 : the event was not passed to any client. | |
828 | * n < 0 : error - event was not processed. | |
829 | */ | |
c7e0b5bf | 830 | int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop) |
1da177e4 | 831 | { |
c7e0b5bf | 832 | struct snd_seq_client *client; |
1da177e4 LT |
833 | int result; |
834 | ||
835 | snd_assert(cell != NULL, return -EINVAL); | |
836 | ||
837 | client = snd_seq_client_use_ptr(cell->event.source.client); | |
838 | if (client == NULL) { | |
839 | snd_seq_cell_free(cell); /* release this cell */ | |
840 | return -EINVAL; | |
841 | } | |
842 | ||
843 | if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) { | |
844 | /* NOTE event: | |
845 | * the event cell is re-used as a NOTE-OFF event and | |
846 | * enqueued again. | |
847 | */ | |
c7e0b5bf | 848 | struct snd_seq_event tmpev, *ev; |
1da177e4 LT |
849 | |
850 | /* reserve this event to enqueue note-off later */ | |
851 | tmpev = cell->event; | |
852 | tmpev.type = SNDRV_SEQ_EVENT_NOTEON; | |
853 | result = snd_seq_deliver_event(client, &tmpev, atomic, hop); | |
854 | ||
855 | /* | |
856 | * This was originally a note event. We now re-use the | |
857 | * cell for the note-off event. | |
858 | */ | |
859 | ||
860 | ev = &cell->event; | |
861 | ev->type = SNDRV_SEQ_EVENT_NOTEOFF; | |
862 | ev->flags |= SNDRV_SEQ_PRIORITY_HIGH; | |
863 | ||
864 | /* add the duration time */ | |
865 | switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) { | |
866 | case SNDRV_SEQ_TIME_STAMP_TICK: | |
867 | ev->time.tick += ev->data.note.duration; | |
868 | break; | |
869 | case SNDRV_SEQ_TIME_STAMP_REAL: | |
870 | /* unit for duration is ms */ | |
871 | ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000); | |
872 | ev->time.time.tv_sec += ev->data.note.duration / 1000 + | |
873 | ev->time.time.tv_nsec / 1000000000; | |
874 | ev->time.time.tv_nsec %= 1000000000; | |
875 | break; | |
876 | } | |
877 | ev->data.note.velocity = ev->data.note.off_velocity; | |
878 | ||
879 | /* Now queue this cell as the note off event */ | |
880 | if (snd_seq_enqueue_event(cell, atomic, hop) < 0) | |
881 | snd_seq_cell_free(cell); /* release this cell */ | |
882 | ||
883 | } else { | |
884 | /* Normal events: | |
885 | * event cell is freed after processing the event | |
886 | */ | |
887 | ||
888 | result = snd_seq_deliver_event(client, &cell->event, atomic, hop); | |
889 | snd_seq_cell_free(cell); | |
890 | } | |
891 | ||
892 | snd_seq_client_unlock(client); | |
893 | return result; | |
894 | } | |
895 | ||
896 | ||
897 | /* Allocate a cell from client pool and enqueue it to queue: | |
898 | * if pool is empty and blocking is TRUE, sleep until a new cell is | |
899 | * available. | |
900 | */ | |
c7e0b5bf TI |
901 | static int snd_seq_client_enqueue_event(struct snd_seq_client *client, |
902 | struct snd_seq_event *event, | |
1da177e4 LT |
903 | struct file *file, int blocking, |
904 | int atomic, int hop) | |
905 | { | |
c7e0b5bf | 906 | struct snd_seq_event_cell *cell; |
1da177e4 LT |
907 | int err; |
908 | ||
909 | /* special queue values - force direct passing */ | |
910 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
911 | event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; | |
912 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
913 | } else | |
914 | #ifdef SUPPORT_BROADCAST | |
915 | if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) { | |
916 | event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST; | |
917 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
918 | } | |
919 | #endif | |
920 | if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
921 | /* check presence of source port */ | |
c7e0b5bf | 922 | struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port); |
1da177e4 LT |
923 | if (src_port == NULL) |
924 | return -EINVAL; | |
925 | snd_seq_port_unlock(src_port); | |
926 | } | |
927 | ||
928 | /* direct event processing without enqueued */ | |
929 | if (snd_seq_ev_is_direct(event)) { | |
930 | if (event->type == SNDRV_SEQ_EVENT_NOTE) | |
931 | return -EINVAL; /* this event must be enqueued! */ | |
932 | return snd_seq_deliver_event(client, event, atomic, hop); | |
933 | } | |
934 | ||
935 | /* Not direct, normal queuing */ | |
936 | if (snd_seq_queue_is_used(event->queue, client->number) <= 0) | |
937 | return -EINVAL; /* invalid queue */ | |
938 | if (! snd_seq_write_pool_allocated(client)) | |
939 | return -ENXIO; /* queue is not allocated */ | |
940 | ||
941 | /* allocate an event cell */ | |
942 | err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file); | |
943 | if (err < 0) | |
944 | return err; | |
945 | ||
946 | /* we got a cell. enqueue it. */ | |
947 | if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) { | |
948 | snd_seq_cell_free(cell); | |
949 | return err; | |
950 | } | |
951 | ||
952 | return 0; | |
953 | } | |
954 | ||
955 | ||
956 | /* | |
957 | * check validity of event type and data length. | |
958 | * return non-zero if invalid. | |
959 | */ | |
c7e0b5bf | 960 | static int check_event_type_and_length(struct snd_seq_event *ev) |
1da177e4 LT |
961 | { |
962 | switch (snd_seq_ev_length_type(ev)) { | |
963 | case SNDRV_SEQ_EVENT_LENGTH_FIXED: | |
964 | if (snd_seq_ev_is_variable_type(ev)) | |
965 | return -EINVAL; | |
966 | break; | |
967 | case SNDRV_SEQ_EVENT_LENGTH_VARIABLE: | |
968 | if (! snd_seq_ev_is_variable_type(ev) || | |
969 | (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN) | |
970 | return -EINVAL; | |
971 | break; | |
972 | case SNDRV_SEQ_EVENT_LENGTH_VARUSR: | |
973 | if (! snd_seq_ev_is_instr_type(ev) || | |
974 | ! snd_seq_ev_is_direct(ev)) | |
975 | return -EINVAL; | |
976 | break; | |
977 | } | |
978 | return 0; | |
979 | } | |
980 | ||
981 | ||
982 | /* handle write() */ | |
983 | /* possible error values: | |
984 | * -ENXIO invalid client or file open mode | |
985 | * -ENOMEM malloc failed | |
986 | * -EFAULT seg. fault during copy from user space | |
987 | * -EINVAL invalid event | |
988 | * -EAGAIN no space in output pool | |
989 | * -EINTR interrupts while sleep | |
990 | * -EMLINK too many hops | |
991 | * others depends on return value from driver callback | |
992 | */ | |
c7e0b5bf TI |
993 | static ssize_t snd_seq_write(struct file *file, const char __user *buf, |
994 | size_t count, loff_t *offset) | |
1da177e4 | 995 | { |
c7e0b5bf | 996 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
997 | int written = 0, len; |
998 | int err = -EINVAL; | |
c7e0b5bf | 999 | struct snd_seq_event event; |
1da177e4 LT |
1000 | |
1001 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT)) | |
1002 | return -ENXIO; | |
1003 | ||
1004 | /* check client structures are in place */ | |
1005 | snd_assert(client != NULL, return -ENXIO); | |
1006 | ||
1007 | if (!client->accept_output || client->pool == NULL) | |
1008 | return -ENXIO; | |
1009 | ||
1010 | /* allocate the pool now if the pool is not allocated yet */ | |
1011 | if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) { | |
1012 | if (snd_seq_pool_init(client->pool) < 0) | |
1013 | return -ENOMEM; | |
1014 | } | |
1015 | ||
1016 | /* only process whole events */ | |
c7e0b5bf | 1017 | while (count >= sizeof(struct snd_seq_event)) { |
1da177e4 LT |
1018 | /* Read in the event header from the user */ |
1019 | len = sizeof(event); | |
1020 | if (copy_from_user(&event, buf, len)) { | |
1021 | err = -EFAULT; | |
1022 | break; | |
1023 | } | |
1024 | event.source.client = client->number; /* fill in client number */ | |
1025 | /* Check for extension data length */ | |
1026 | if (check_event_type_and_length(&event)) { | |
1027 | err = -EINVAL; | |
1028 | break; | |
1029 | } | |
1030 | ||
1031 | /* check for special events */ | |
1032 | if (event.type == SNDRV_SEQ_EVENT_NONE) | |
1033 | goto __skip_event; | |
1034 | else if (snd_seq_ev_is_reserved(&event)) { | |
1035 | err = -EINVAL; | |
1036 | break; | |
1037 | } | |
1038 | ||
1039 | if (snd_seq_ev_is_variable(&event)) { | |
1040 | int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK; | |
1041 | if ((size_t)(extlen + len) > count) { | |
1042 | /* back out, will get an error this time or next */ | |
1043 | err = -EINVAL; | |
1044 | break; | |
1045 | } | |
1046 | /* set user space pointer */ | |
1047 | event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR; | |
4d23359b | 1048 | event.data.ext.ptr = (char __force *)buf |
c7e0b5bf | 1049 | + sizeof(struct snd_seq_event); |
1da177e4 LT |
1050 | len += extlen; /* increment data length */ |
1051 | } else { | |
1052 | #ifdef CONFIG_COMPAT | |
1053 | if (client->convert32 && snd_seq_ev_is_varusr(&event)) { | |
1054 | void *ptr = compat_ptr(event.data.raw32.d[1]); | |
1055 | event.data.ext.ptr = ptr; | |
1056 | } | |
1057 | #endif | |
1058 | } | |
1059 | ||
1060 | /* ok, enqueue it */ | |
1061 | err = snd_seq_client_enqueue_event(client, &event, file, | |
1062 | !(file->f_flags & O_NONBLOCK), | |
1063 | 0, 0); | |
1064 | if (err < 0) | |
1065 | break; | |
1066 | ||
1067 | __skip_event: | |
1068 | /* Update pointers and counts */ | |
1069 | count -= len; | |
1070 | buf += len; | |
1071 | written += len; | |
1072 | } | |
1073 | ||
1074 | return written ? written : err; | |
1075 | } | |
1076 | ||
1077 | ||
1078 | /* | |
1079 | * handle polling | |
1080 | */ | |
1081 | static unsigned int snd_seq_poll(struct file *file, poll_table * wait) | |
1082 | { | |
c7e0b5bf | 1083 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
1084 | unsigned int mask = 0; |
1085 | ||
1086 | /* check client structures are in place */ | |
1087 | snd_assert(client != NULL, return -ENXIO); | |
1088 | ||
1089 | if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) && | |
1090 | client->data.user.fifo) { | |
1091 | ||
1092 | /* check if data is available in the outqueue */ | |
1093 | if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait)) | |
1094 | mask |= POLLIN | POLLRDNORM; | |
1095 | } | |
1096 | ||
1097 | if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) { | |
1098 | ||
1099 | /* check if data is available in the pool */ | |
1100 | if (!snd_seq_write_pool_allocated(client) || | |
1101 | snd_seq_pool_poll_wait(client->pool, file, wait)) | |
1102 | mask |= POLLOUT | POLLWRNORM; | |
1103 | } | |
1104 | ||
1105 | return mask; | |
1106 | } | |
1107 | ||
1108 | ||
1109 | /*-----------------------------------------------------*/ | |
1110 | ||
1111 | ||
1112 | /* SYSTEM_INFO ioctl() */ | |
c7e0b5bf | 1113 | static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void __user *arg) |
1da177e4 | 1114 | { |
c7e0b5bf | 1115 | struct snd_seq_system_info info; |
1da177e4 LT |
1116 | |
1117 | memset(&info, 0, sizeof(info)); | |
1118 | /* fill the info fields */ | |
1119 | info.queues = SNDRV_SEQ_MAX_QUEUES; | |
1120 | info.clients = SNDRV_SEQ_MAX_CLIENTS; | |
1121 | info.ports = 256; /* fixed limit */ | |
1122 | info.channels = 256; /* fixed limit */ | |
1123 | info.cur_clients = client_usage.cur; | |
1124 | info.cur_queues = snd_seq_queue_get_cur_queues(); | |
1125 | ||
1126 | if (copy_to_user(arg, &info, sizeof(info))) | |
1127 | return -EFAULT; | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | ||
1132 | /* RUNNING_MODE ioctl() */ | |
c7e0b5bf | 1133 | static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void __user *arg) |
1da177e4 | 1134 | { |
c7e0b5bf TI |
1135 | struct snd_seq_running_info info; |
1136 | struct snd_seq_client *cptr; | |
1da177e4 LT |
1137 | int err = 0; |
1138 | ||
1139 | if (copy_from_user(&info, arg, sizeof(info))) | |
1140 | return -EFAULT; | |
1141 | ||
1142 | /* requested client number */ | |
1143 | cptr = snd_seq_client_use_ptr(info.client); | |
1144 | if (cptr == NULL) | |
1145 | return -ENOENT; /* don't change !!! */ | |
1146 | ||
1147 | #ifdef SNDRV_BIG_ENDIAN | |
1148 | if (! info.big_endian) { | |
1149 | err = -EINVAL; | |
1150 | goto __err; | |
1151 | } | |
1152 | #else | |
1153 | if (info.big_endian) { | |
1154 | err = -EINVAL; | |
1155 | goto __err; | |
1156 | } | |
1157 | ||
1158 | #endif | |
1159 | if (info.cpu_mode > sizeof(long)) { | |
1160 | err = -EINVAL; | |
1161 | goto __err; | |
1162 | } | |
1163 | cptr->convert32 = (info.cpu_mode < sizeof(long)); | |
1164 | __err: | |
1165 | snd_seq_client_unlock(cptr); | |
1166 | return err; | |
1167 | } | |
1168 | ||
1169 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf TI |
1170 | static void get_client_info(struct snd_seq_client *cptr, |
1171 | struct snd_seq_client_info *info) | |
1da177e4 LT |
1172 | { |
1173 | info->client = cptr->number; | |
1174 | ||
1175 | /* fill the info fields */ | |
1176 | info->type = cptr->type; | |
1177 | strcpy(info->name, cptr->name); | |
1178 | info->filter = cptr->filter; | |
1179 | info->event_lost = cptr->event_lost; | |
1180 | memcpy(info->event_filter, cptr->event_filter, 32); | |
1181 | info->num_ports = cptr->num_ports; | |
1182 | memset(info->reserved, 0, sizeof(info->reserved)); | |
1183 | } | |
1184 | ||
c7e0b5bf TI |
1185 | static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client, |
1186 | void __user *arg) | |
1da177e4 | 1187 | { |
c7e0b5bf TI |
1188 | struct snd_seq_client *cptr; |
1189 | struct snd_seq_client_info client_info; | |
1da177e4 LT |
1190 | |
1191 | if (copy_from_user(&client_info, arg, sizeof(client_info))) | |
1192 | return -EFAULT; | |
1193 | ||
1194 | /* requested client number */ | |
1195 | cptr = snd_seq_client_use_ptr(client_info.client); | |
1196 | if (cptr == NULL) | |
1197 | return -ENOENT; /* don't change !!! */ | |
1198 | ||
1199 | get_client_info(cptr, &client_info); | |
1200 | snd_seq_client_unlock(cptr); | |
1201 | ||
1202 | if (copy_to_user(arg, &client_info, sizeof(client_info))) | |
1203 | return -EFAULT; | |
1204 | return 0; | |
1205 | } | |
1206 | ||
1207 | ||
1208 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf TI |
1209 | static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, |
1210 | void __user *arg) | |
1da177e4 | 1211 | { |
c7e0b5bf | 1212 | struct snd_seq_client_info client_info; |
1da177e4 LT |
1213 | |
1214 | if (copy_from_user(&client_info, arg, sizeof(client_info))) | |
1215 | return -EFAULT; | |
1216 | ||
1217 | /* it is not allowed to set the info fields for an another client */ | |
1218 | if (client->number != client_info.client) | |
1219 | return -EPERM; | |
1220 | /* also client type must be set now */ | |
1221 | if (client->type != client_info.type) | |
1222 | return -EINVAL; | |
1223 | ||
1224 | /* fill the info fields */ | |
1225 | if (client_info.name[0]) | |
1226 | strlcpy(client->name, client_info.name, sizeof(client->name)); | |
1227 | ||
1228 | client->filter = client_info.filter; | |
1229 | client->event_lost = client_info.event_lost; | |
1230 | memcpy(client->event_filter, client_info.event_filter, 32); | |
1231 | ||
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | ||
1236 | /* | |
1237 | * CREATE PORT ioctl() | |
1238 | */ | |
c7e0b5bf TI |
1239 | static int snd_seq_ioctl_create_port(struct snd_seq_client *client, |
1240 | void __user *arg) | |
1da177e4 | 1241 | { |
c7e0b5bf TI |
1242 | struct snd_seq_client_port *port; |
1243 | struct snd_seq_port_info info; | |
1244 | struct snd_seq_port_callback *callback; | |
1da177e4 LT |
1245 | |
1246 | if (copy_from_user(&info, arg, sizeof(info))) | |
1247 | return -EFAULT; | |
1248 | ||
1249 | /* it is not allowed to create the port for an another client */ | |
1250 | if (info.addr.client != client->number) | |
1251 | return -EPERM; | |
1252 | ||
1253 | port = snd_seq_create_port(client, (info.flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info.addr.port : -1); | |
1254 | if (port == NULL) | |
1255 | return -ENOMEM; | |
1256 | ||
1257 | if (client->type == USER_CLIENT && info.kernel) { | |
1258 | snd_seq_delete_port(client, port->addr.port); | |
1259 | return -EINVAL; | |
1260 | } | |
1261 | if (client->type == KERNEL_CLIENT) { | |
1262 | if ((callback = info.kernel) != NULL) { | |
1263 | if (callback->owner) | |
1264 | port->owner = callback->owner; | |
1265 | port->private_data = callback->private_data; | |
1266 | port->private_free = callback->private_free; | |
1267 | port->callback_all = callback->callback_all; | |
1268 | port->event_input = callback->event_input; | |
1269 | port->c_src.open = callback->subscribe; | |
1270 | port->c_src.close = callback->unsubscribe; | |
1271 | port->c_dest.open = callback->use; | |
1272 | port->c_dest.close = callback->unuse; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | info.addr = port->addr; | |
1277 | ||
1278 | snd_seq_set_port_info(port, &info); | |
1279 | snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); | |
1280 | ||
1281 | if (copy_to_user(arg, &info, sizeof(info))) | |
1282 | return -EFAULT; | |
1283 | ||
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | * DELETE PORT ioctl() | |
1289 | */ | |
c7e0b5bf TI |
1290 | static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, |
1291 | void __user *arg) | |
1da177e4 | 1292 | { |
c7e0b5bf | 1293 | struct snd_seq_port_info info; |
1da177e4 LT |
1294 | int err; |
1295 | ||
1296 | /* set passed parameters */ | |
1297 | if (copy_from_user(&info, arg, sizeof(info))) | |
1298 | return -EFAULT; | |
1299 | ||
1300 | /* it is not allowed to remove the port for an another client */ | |
1301 | if (info.addr.client != client->number) | |
1302 | return -EPERM; | |
1303 | ||
1304 | err = snd_seq_delete_port(client, info.addr.port); | |
1305 | if (err >= 0) | |
1306 | snd_seq_system_client_ev_port_exit(client->number, info.addr.port); | |
1307 | return err; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | /* | |
1312 | * GET_PORT_INFO ioctl() (on any client) | |
1313 | */ | |
c7e0b5bf TI |
1314 | static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, |
1315 | void __user *arg) | |
1da177e4 | 1316 | { |
c7e0b5bf TI |
1317 | struct snd_seq_client *cptr; |
1318 | struct snd_seq_client_port *port; | |
1319 | struct snd_seq_port_info info; | |
1da177e4 LT |
1320 | |
1321 | if (copy_from_user(&info, arg, sizeof(info))) | |
1322 | return -EFAULT; | |
1323 | cptr = snd_seq_client_use_ptr(info.addr.client); | |
1324 | if (cptr == NULL) | |
1325 | return -ENXIO; | |
1326 | ||
1327 | port = snd_seq_port_use_ptr(cptr, info.addr.port); | |
1328 | if (port == NULL) { | |
1329 | snd_seq_client_unlock(cptr); | |
1330 | return -ENOENT; /* don't change */ | |
1331 | } | |
1332 | ||
1333 | /* get port info */ | |
1334 | snd_seq_get_port_info(port, &info); | |
1335 | snd_seq_port_unlock(port); | |
1336 | snd_seq_client_unlock(cptr); | |
1337 | ||
1338 | if (copy_to_user(arg, &info, sizeof(info))) | |
1339 | return -EFAULT; | |
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | ||
1344 | /* | |
1345 | * SET_PORT_INFO ioctl() (only ports on this/own client) | |
1346 | */ | |
c7e0b5bf TI |
1347 | static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, |
1348 | void __user *arg) | |
1da177e4 | 1349 | { |
c7e0b5bf TI |
1350 | struct snd_seq_client_port *port; |
1351 | struct snd_seq_port_info info; | |
1da177e4 LT |
1352 | |
1353 | if (copy_from_user(&info, arg, sizeof(info))) | |
1354 | return -EFAULT; | |
1355 | ||
1356 | if (info.addr.client != client->number) /* only set our own ports ! */ | |
1357 | return -EPERM; | |
1358 | port = snd_seq_port_use_ptr(client, info.addr.port); | |
1359 | if (port) { | |
1360 | snd_seq_set_port_info(port, &info); | |
1361 | snd_seq_port_unlock(port); | |
1362 | } | |
1363 | return 0; | |
1364 | } | |
1365 | ||
1366 | ||
1367 | /* | |
1368 | * port subscription (connection) | |
1369 | */ | |
1370 | #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ) | |
1371 | #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE) | |
1372 | ||
c7e0b5bf TI |
1373 | static int check_subscription_permission(struct snd_seq_client *client, |
1374 | struct snd_seq_client_port *sport, | |
1375 | struct snd_seq_client_port *dport, | |
1376 | struct snd_seq_port_subscribe *subs) | |
1da177e4 LT |
1377 | { |
1378 | if (client->number != subs->sender.client && | |
1379 | client->number != subs->dest.client) { | |
1380 | /* connection by third client - check export permission */ | |
1381 | if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1382 | return -EPERM; | |
1383 | if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1384 | return -EPERM; | |
1385 | } | |
1386 | ||
1387 | /* check read permission */ | |
1388 | /* if sender or receiver is the subscribing client itself, | |
1389 | * no permission check is necessary | |
1390 | */ | |
1391 | if (client->number != subs->sender.client) { | |
1392 | if (! check_port_perm(sport, PERM_RD)) | |
1393 | return -EPERM; | |
1394 | } | |
1395 | /* check write permission */ | |
1396 | if (client->number != subs->dest.client) { | |
1397 | if (! check_port_perm(dport, PERM_WR)) | |
1398 | return -EPERM; | |
1399 | } | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * send an subscription notify event to user client: | |
1405 | * client must be user client. | |
1406 | */ | |
1407 | int snd_seq_client_notify_subscription(int client, int port, | |
c7e0b5bf TI |
1408 | struct snd_seq_port_subscribe *info, |
1409 | int evtype) | |
1da177e4 | 1410 | { |
c7e0b5bf | 1411 | struct snd_seq_event event; |
1da177e4 LT |
1412 | |
1413 | memset(&event, 0, sizeof(event)); | |
1414 | event.type = evtype; | |
1415 | event.data.connect.dest = info->dest; | |
1416 | event.data.connect.sender = info->sender; | |
1417 | ||
1418 | return snd_seq_system_notify(client, port, &event); /* non-atomic */ | |
1419 | } | |
1420 | ||
1421 | ||
1422 | /* | |
1423 | * add to port's subscription list IOCTL interface | |
1424 | */ | |
c7e0b5bf TI |
1425 | static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client, |
1426 | void __user *arg) | |
1da177e4 LT |
1427 | { |
1428 | int result = -EINVAL; | |
c7e0b5bf TI |
1429 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1430 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1431 | struct snd_seq_port_subscribe subs; | |
1da177e4 LT |
1432 | |
1433 | if (copy_from_user(&subs, arg, sizeof(subs))) | |
1434 | return -EFAULT; | |
1435 | ||
1436 | if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL) | |
1437 | goto __end; | |
1438 | if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) | |
1439 | goto __end; | |
1440 | if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) | |
1441 | goto __end; | |
1442 | if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL) | |
1443 | goto __end; | |
1444 | ||
1445 | result = check_subscription_permission(client, sport, dport, &subs); | |
1446 | if (result < 0) | |
1447 | goto __end; | |
1448 | ||
1449 | /* connect them */ | |
1450 | result = snd_seq_port_connect(client, sender, sport, receiver, dport, &subs); | |
1451 | if (! result) /* broadcast announce */ | |
1452 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
1453 | &subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED); | |
1454 | __end: | |
1455 | if (sport) | |
1456 | snd_seq_port_unlock(sport); | |
1457 | if (dport) | |
1458 | snd_seq_port_unlock(dport); | |
1459 | if (sender) | |
1460 | snd_seq_client_unlock(sender); | |
1461 | if (receiver) | |
1462 | snd_seq_client_unlock(receiver); | |
1463 | return result; | |
1464 | } | |
1465 | ||
1466 | ||
1467 | /* | |
1468 | * remove from port's subscription list | |
1469 | */ | |
c7e0b5bf TI |
1470 | static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client, |
1471 | void __user *arg) | |
1da177e4 LT |
1472 | { |
1473 | int result = -ENXIO; | |
c7e0b5bf TI |
1474 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1475 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1476 | struct snd_seq_port_subscribe subs; | |
1da177e4 LT |
1477 | |
1478 | if (copy_from_user(&subs, arg, sizeof(subs))) | |
1479 | return -EFAULT; | |
1480 | ||
1481 | if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL) | |
1482 | goto __end; | |
1483 | if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) | |
1484 | goto __end; | |
1485 | if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) | |
1486 | goto __end; | |
1487 | if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL) | |
1488 | goto __end; | |
1489 | ||
1490 | result = check_subscription_permission(client, sport, dport, &subs); | |
1491 | if (result < 0) | |
1492 | goto __end; | |
1493 | ||
1494 | result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, &subs); | |
1495 | if (! result) /* broadcast announce */ | |
1496 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
1497 | &subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED); | |
1498 | __end: | |
1499 | if (sport) | |
1500 | snd_seq_port_unlock(sport); | |
1501 | if (dport) | |
1502 | snd_seq_port_unlock(dport); | |
1503 | if (sender) | |
1504 | snd_seq_client_unlock(sender); | |
1505 | if (receiver) | |
1506 | snd_seq_client_unlock(receiver); | |
1507 | return result; | |
1508 | } | |
1509 | ||
1510 | ||
1511 | /* CREATE_QUEUE ioctl() */ | |
c7e0b5bf TI |
1512 | static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, |
1513 | void __user *arg) | |
1da177e4 | 1514 | { |
c7e0b5bf | 1515 | struct snd_seq_queue_info info; |
1da177e4 | 1516 | int result; |
c7e0b5bf | 1517 | struct snd_seq_queue *q; |
1da177e4 LT |
1518 | |
1519 | if (copy_from_user(&info, arg, sizeof(info))) | |
1520 | return -EFAULT; | |
1521 | ||
1522 | result = snd_seq_queue_alloc(client->number, info.locked, info.flags); | |
1523 | if (result < 0) | |
1524 | return result; | |
1525 | ||
1526 | q = queueptr(result); | |
1527 | if (q == NULL) | |
1528 | return -EINVAL; | |
1529 | ||
1530 | info.queue = q->queue; | |
1531 | info.locked = q->locked; | |
1532 | info.owner = q->owner; | |
1533 | ||
1534 | /* set queue name */ | |
1535 | if (! info.name[0]) | |
1536 | snprintf(info.name, sizeof(info.name), "Queue-%d", q->queue); | |
1537 | strlcpy(q->name, info.name, sizeof(q->name)); | |
1538 | queuefree(q); | |
1539 | ||
1540 | if (copy_to_user(arg, &info, sizeof(info))) | |
1541 | return -EFAULT; | |
1542 | ||
1543 | return 0; | |
1544 | } | |
1545 | ||
1546 | /* DELETE_QUEUE ioctl() */ | |
c7e0b5bf TI |
1547 | static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, |
1548 | void __user *arg) | |
1da177e4 | 1549 | { |
c7e0b5bf | 1550 | struct snd_seq_queue_info info; |
1da177e4 LT |
1551 | |
1552 | if (copy_from_user(&info, arg, sizeof(info))) | |
1553 | return -EFAULT; | |
1554 | ||
1555 | return snd_seq_queue_delete(client->number, info.queue); | |
1556 | } | |
1557 | ||
1558 | /* GET_QUEUE_INFO ioctl() */ | |
c7e0b5bf TI |
1559 | static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client, |
1560 | void __user *arg) | |
1da177e4 | 1561 | { |
c7e0b5bf TI |
1562 | struct snd_seq_queue_info info; |
1563 | struct snd_seq_queue *q; | |
1da177e4 LT |
1564 | |
1565 | if (copy_from_user(&info, arg, sizeof(info))) | |
1566 | return -EFAULT; | |
1567 | ||
1568 | q = queueptr(info.queue); | |
1569 | if (q == NULL) | |
1570 | return -EINVAL; | |
1571 | ||
1572 | memset(&info, 0, sizeof(info)); | |
1573 | info.queue = q->queue; | |
1574 | info.owner = q->owner; | |
1575 | info.locked = q->locked; | |
1576 | strlcpy(info.name, q->name, sizeof(info.name)); | |
1577 | queuefree(q); | |
1578 | ||
1579 | if (copy_to_user(arg, &info, sizeof(info))) | |
1580 | return -EFAULT; | |
1581 | ||
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | /* SET_QUEUE_INFO ioctl() */ | |
c7e0b5bf TI |
1586 | static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client, |
1587 | void __user *arg) | |
1da177e4 | 1588 | { |
c7e0b5bf TI |
1589 | struct snd_seq_queue_info info; |
1590 | struct snd_seq_queue *q; | |
1da177e4 LT |
1591 | |
1592 | if (copy_from_user(&info, arg, sizeof(info))) | |
1593 | return -EFAULT; | |
1594 | ||
1595 | if (info.owner != client->number) | |
1596 | return -EINVAL; | |
1597 | ||
1598 | /* change owner/locked permission */ | |
1599 | if (snd_seq_queue_check_access(info.queue, client->number)) { | |
1600 | if (snd_seq_queue_set_owner(info.queue, client->number, info.locked) < 0) | |
1601 | return -EPERM; | |
1602 | if (info.locked) | |
1603 | snd_seq_queue_use(info.queue, client->number, 1); | |
1604 | } else { | |
1605 | return -EPERM; | |
1606 | } | |
1607 | ||
1608 | q = queueptr(info.queue); | |
1609 | if (! q) | |
1610 | return -EINVAL; | |
1611 | if (q->owner != client->number) { | |
1612 | queuefree(q); | |
1613 | return -EPERM; | |
1614 | } | |
1615 | strlcpy(q->name, info.name, sizeof(q->name)); | |
1616 | queuefree(q); | |
1617 | ||
1618 | return 0; | |
1619 | } | |
1620 | ||
1621 | /* GET_NAMED_QUEUE ioctl() */ | |
c7e0b5bf | 1622 | static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, void __user *arg) |
1da177e4 | 1623 | { |
c7e0b5bf TI |
1624 | struct snd_seq_queue_info info; |
1625 | struct snd_seq_queue *q; | |
1da177e4 LT |
1626 | |
1627 | if (copy_from_user(&info, arg, sizeof(info))) | |
1628 | return -EFAULT; | |
1629 | ||
1630 | q = snd_seq_queue_find_name(info.name); | |
1631 | if (q == NULL) | |
1632 | return -EINVAL; | |
1633 | info.queue = q->queue; | |
1634 | info.owner = q->owner; | |
1635 | info.locked = q->locked; | |
1636 | queuefree(q); | |
1637 | ||
1638 | if (copy_to_user(arg, &info, sizeof(info))) | |
1639 | return -EFAULT; | |
1640 | ||
1641 | return 0; | |
1642 | } | |
1643 | ||
1644 | /* GET_QUEUE_STATUS ioctl() */ | |
c7e0b5bf TI |
1645 | static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client, |
1646 | void __user *arg) | |
1da177e4 | 1647 | { |
c7e0b5bf TI |
1648 | struct snd_seq_queue_status status; |
1649 | struct snd_seq_queue *queue; | |
1650 | struct snd_seq_timer *tmr; | |
1da177e4 LT |
1651 | |
1652 | if (copy_from_user(&status, arg, sizeof(status))) | |
1653 | return -EFAULT; | |
1654 | ||
1655 | queue = queueptr(status.queue); | |
1656 | if (queue == NULL) | |
1657 | return -EINVAL; | |
1658 | memset(&status, 0, sizeof(status)); | |
1659 | status.queue = queue->queue; | |
1660 | ||
1661 | tmr = queue->timer; | |
1662 | status.events = queue->tickq->cells + queue->timeq->cells; | |
1663 | ||
1664 | status.time = snd_seq_timer_get_cur_time(tmr); | |
1665 | status.tick = snd_seq_timer_get_cur_tick(tmr); | |
1666 | ||
1667 | status.running = tmr->running; | |
1668 | ||
1669 | status.flags = queue->flags; | |
1670 | queuefree(queue); | |
1671 | ||
1672 | if (copy_to_user(arg, &status, sizeof(status))) | |
1673 | return -EFAULT; | |
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | ||
1678 | /* GET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf TI |
1679 | static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, |
1680 | void __user *arg) | |
1da177e4 | 1681 | { |
c7e0b5bf TI |
1682 | struct snd_seq_queue_tempo tempo; |
1683 | struct snd_seq_queue *queue; | |
1684 | struct snd_seq_timer *tmr; | |
1da177e4 LT |
1685 | |
1686 | if (copy_from_user(&tempo, arg, sizeof(tempo))) | |
1687 | return -EFAULT; | |
1688 | ||
1689 | queue = queueptr(tempo.queue); | |
1690 | if (queue == NULL) | |
1691 | return -EINVAL; | |
1692 | memset(&tempo, 0, sizeof(tempo)); | |
1693 | tempo.queue = queue->queue; | |
1694 | ||
1695 | tmr = queue->timer; | |
1696 | ||
1697 | tempo.tempo = tmr->tempo; | |
1698 | tempo.ppq = tmr->ppq; | |
1699 | tempo.skew_value = tmr->skew; | |
1700 | tempo.skew_base = tmr->skew_base; | |
1701 | queuefree(queue); | |
1702 | ||
1703 | if (copy_to_user(arg, &tempo, sizeof(tempo))) | |
1704 | return -EFAULT; | |
1705 | return 0; | |
1706 | } | |
1707 | ||
1708 | ||
1709 | /* SET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf | 1710 | int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo) |
1da177e4 LT |
1711 | { |
1712 | if (!snd_seq_queue_check_access(tempo->queue, client)) | |
1713 | return -EPERM; | |
1714 | return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo); | |
1715 | } | |
1716 | ||
c7e0b5bf TI |
1717 | static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, |
1718 | void __user *arg) | |
1da177e4 LT |
1719 | { |
1720 | int result; | |
c7e0b5bf | 1721 | struct snd_seq_queue_tempo tempo; |
1da177e4 LT |
1722 | |
1723 | if (copy_from_user(&tempo, arg, sizeof(tempo))) | |
1724 | return -EFAULT; | |
1725 | ||
1726 | result = snd_seq_set_queue_tempo(client->number, &tempo); | |
1727 | return result < 0 ? result : 0; | |
1728 | } | |
1729 | ||
1730 | ||
1731 | /* GET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf TI |
1732 | static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client, |
1733 | void __user *arg) | |
1da177e4 | 1734 | { |
c7e0b5bf TI |
1735 | struct snd_seq_queue_timer timer; |
1736 | struct snd_seq_queue *queue; | |
1737 | struct snd_seq_timer *tmr; | |
1da177e4 LT |
1738 | |
1739 | if (copy_from_user(&timer, arg, sizeof(timer))) | |
1740 | return -EFAULT; | |
1741 | ||
1742 | queue = queueptr(timer.queue); | |
1743 | if (queue == NULL) | |
1744 | return -EINVAL; | |
1745 | ||
1a60d4c5 | 1746 | if (mutex_lock_interruptible(&queue->timer_mutex)) { |
1da177e4 LT |
1747 | queuefree(queue); |
1748 | return -ERESTARTSYS; | |
1749 | } | |
1750 | tmr = queue->timer; | |
1751 | memset(&timer, 0, sizeof(timer)); | |
1752 | timer.queue = queue->queue; | |
1753 | ||
1754 | timer.type = tmr->type; | |
1755 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { | |
1756 | timer.u.alsa.id = tmr->alsa_id; | |
1757 | timer.u.alsa.resolution = tmr->preferred_resolution; | |
1758 | } | |
1a60d4c5 | 1759 | mutex_unlock(&queue->timer_mutex); |
1da177e4 LT |
1760 | queuefree(queue); |
1761 | ||
1762 | if (copy_to_user(arg, &timer, sizeof(timer))) | |
1763 | return -EFAULT; | |
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | ||
1768 | /* SET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf TI |
1769 | static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client, |
1770 | void __user *arg) | |
1da177e4 LT |
1771 | { |
1772 | int result = 0; | |
c7e0b5bf | 1773 | struct snd_seq_queue_timer timer; |
1da177e4 LT |
1774 | |
1775 | if (copy_from_user(&timer, arg, sizeof(timer))) | |
1776 | return -EFAULT; | |
1777 | ||
1778 | if (timer.type != SNDRV_SEQ_TIMER_ALSA) | |
1779 | return -EINVAL; | |
1780 | ||
1781 | if (snd_seq_queue_check_access(timer.queue, client->number)) { | |
c7e0b5bf TI |
1782 | struct snd_seq_queue *q; |
1783 | struct snd_seq_timer *tmr; | |
1da177e4 LT |
1784 | |
1785 | q = queueptr(timer.queue); | |
1786 | if (q == NULL) | |
1787 | return -ENXIO; | |
1a60d4c5 | 1788 | if (mutex_lock_interruptible(&q->timer_mutex)) { |
1da177e4 LT |
1789 | queuefree(q); |
1790 | return -ERESTARTSYS; | |
1791 | } | |
1792 | tmr = q->timer; | |
1793 | snd_seq_queue_timer_close(timer.queue); | |
1794 | tmr->type = timer.type; | |
1795 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { | |
1796 | tmr->alsa_id = timer.u.alsa.id; | |
1797 | tmr->preferred_resolution = timer.u.alsa.resolution; | |
1798 | } | |
1799 | result = snd_seq_queue_timer_open(timer.queue); | |
1a60d4c5 | 1800 | mutex_unlock(&q->timer_mutex); |
1da177e4 LT |
1801 | queuefree(q); |
1802 | } else { | |
1803 | return -EPERM; | |
1804 | } | |
1805 | ||
1806 | return result; | |
1807 | } | |
1808 | ||
1809 | ||
1810 | /* GET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf TI |
1811 | static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client, |
1812 | void __user *arg) | |
1da177e4 | 1813 | { |
c7e0b5bf | 1814 | struct snd_seq_queue_client info; |
1da177e4 LT |
1815 | int used; |
1816 | ||
1817 | if (copy_from_user(&info, arg, sizeof(info))) | |
1818 | return -EFAULT; | |
1819 | ||
1820 | used = snd_seq_queue_is_used(info.queue, client->number); | |
1821 | if (used < 0) | |
1822 | return -EINVAL; | |
1823 | info.used = used; | |
1824 | info.client = client->number; | |
1825 | ||
1826 | if (copy_to_user(arg, &info, sizeof(info))) | |
1827 | return -EFAULT; | |
1828 | return 0; | |
1829 | } | |
1830 | ||
1831 | ||
1832 | /* SET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf TI |
1833 | static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client, |
1834 | void __user *arg) | |
1da177e4 LT |
1835 | { |
1836 | int err; | |
c7e0b5bf | 1837 | struct snd_seq_queue_client info; |
1da177e4 LT |
1838 | |
1839 | if (copy_from_user(&info, arg, sizeof(info))) | |
1840 | return -EFAULT; | |
1841 | ||
1842 | if (info.used >= 0) { | |
1843 | err = snd_seq_queue_use(info.queue, client->number, info.used); | |
1844 | if (err < 0) | |
1845 | return err; | |
1846 | } | |
1847 | ||
1848 | return snd_seq_ioctl_get_queue_client(client, arg); | |
1849 | } | |
1850 | ||
1851 | ||
1852 | /* GET_CLIENT_POOL ioctl() */ | |
c7e0b5bf TI |
1853 | static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, |
1854 | void __user *arg) | |
1da177e4 | 1855 | { |
c7e0b5bf TI |
1856 | struct snd_seq_client_pool info; |
1857 | struct snd_seq_client *cptr; | |
1da177e4 LT |
1858 | |
1859 | if (copy_from_user(&info, arg, sizeof(info))) | |
1860 | return -EFAULT; | |
1861 | ||
1862 | cptr = snd_seq_client_use_ptr(info.client); | |
1863 | if (cptr == NULL) | |
1864 | return -ENOENT; | |
1865 | memset(&info, 0, sizeof(info)); | |
1866 | info.output_pool = cptr->pool->size; | |
1867 | info.output_room = cptr->pool->room; | |
1868 | info.output_free = info.output_pool; | |
1869 | if (cptr->pool) | |
1870 | info.output_free = snd_seq_unused_cells(cptr->pool); | |
1871 | if (cptr->type == USER_CLIENT) { | |
1872 | info.input_pool = cptr->data.user.fifo_pool_size; | |
1873 | info.input_free = info.input_pool; | |
1874 | if (cptr->data.user.fifo) | |
1875 | info.input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); | |
1876 | } else { | |
1877 | info.input_pool = 0; | |
1878 | info.input_free = 0; | |
1879 | } | |
1880 | snd_seq_client_unlock(cptr); | |
1881 | ||
1882 | if (copy_to_user(arg, &info, sizeof(info))) | |
1883 | return -EFAULT; | |
1884 | return 0; | |
1885 | } | |
1886 | ||
1887 | /* SET_CLIENT_POOL ioctl() */ | |
c7e0b5bf TI |
1888 | static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, |
1889 | void __user *arg) | |
1da177e4 | 1890 | { |
c7e0b5bf | 1891 | struct snd_seq_client_pool info; |
1da177e4 LT |
1892 | int rc; |
1893 | ||
1894 | if (copy_from_user(&info, arg, sizeof(info))) | |
1895 | return -EFAULT; | |
1896 | ||
1897 | if (client->number != info.client) | |
1898 | return -EINVAL; /* can't change other clients */ | |
1899 | ||
1900 | if (info.output_pool >= 1 && info.output_pool <= SNDRV_SEQ_MAX_EVENTS && | |
1901 | (! snd_seq_write_pool_allocated(client) || | |
1902 | info.output_pool != client->pool->size)) { | |
1903 | if (snd_seq_write_pool_allocated(client)) { | |
1904 | /* remove all existing cells */ | |
1905 | snd_seq_queue_client_leave_cells(client->number); | |
1906 | snd_seq_pool_done(client->pool); | |
1907 | } | |
1908 | client->pool->size = info.output_pool; | |
1909 | rc = snd_seq_pool_init(client->pool); | |
1910 | if (rc < 0) | |
1911 | return rc; | |
1912 | } | |
1913 | if (client->type == USER_CLIENT && client->data.user.fifo != NULL && | |
1914 | info.input_pool >= 1 && | |
1915 | info.input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && | |
1916 | info.input_pool != client->data.user.fifo_pool_size) { | |
1917 | /* change pool size */ | |
1918 | rc = snd_seq_fifo_resize(client->data.user.fifo, info.input_pool); | |
1919 | if (rc < 0) | |
1920 | return rc; | |
1921 | client->data.user.fifo_pool_size = info.input_pool; | |
1922 | } | |
1923 | if (info.output_room >= 1 && | |
1924 | info.output_room <= client->pool->size) { | |
1925 | client->pool->room = info.output_room; | |
1926 | } | |
1927 | ||
1928 | return snd_seq_ioctl_get_client_pool(client, arg); | |
1929 | } | |
1930 | ||
1931 | ||
1932 | /* REMOVE_EVENTS ioctl() */ | |
c7e0b5bf TI |
1933 | static int snd_seq_ioctl_remove_events(struct snd_seq_client *client, |
1934 | void __user *arg) | |
1da177e4 | 1935 | { |
c7e0b5bf | 1936 | struct snd_seq_remove_events info; |
1da177e4 LT |
1937 | |
1938 | if (copy_from_user(&info, arg, sizeof(info))) | |
1939 | return -EFAULT; | |
1940 | ||
1941 | /* | |
1942 | * Input mostly not implemented XXX. | |
1943 | */ | |
1944 | if (info.remove_mode & SNDRV_SEQ_REMOVE_INPUT) { | |
1945 | /* | |
1946 | * No restrictions so for a user client we can clear | |
1947 | * the whole fifo | |
1948 | */ | |
1949 | if (client->type == USER_CLIENT) | |
1950 | snd_seq_fifo_clear(client->data.user.fifo); | |
1951 | } | |
1952 | ||
1953 | if (info.remove_mode & SNDRV_SEQ_REMOVE_OUTPUT) | |
1954 | snd_seq_queue_remove_cells(client->number, &info); | |
1955 | ||
1956 | return 0; | |
1957 | } | |
1958 | ||
1959 | ||
1960 | /* | |
1961 | * get subscription info | |
1962 | */ | |
c7e0b5bf TI |
1963 | static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client, |
1964 | void __user *arg) | |
1da177e4 LT |
1965 | { |
1966 | int result; | |
c7e0b5bf TI |
1967 | struct snd_seq_client *sender = NULL; |
1968 | struct snd_seq_client_port *sport = NULL; | |
1969 | struct snd_seq_port_subscribe subs; | |
1970 | struct snd_seq_subscribers *p; | |
1da177e4 LT |
1971 | |
1972 | if (copy_from_user(&subs, arg, sizeof(subs))) | |
1973 | return -EFAULT; | |
1974 | ||
1975 | result = -EINVAL; | |
1976 | if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL) | |
1977 | goto __end; | |
1978 | if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL) | |
1979 | goto __end; | |
1980 | p = snd_seq_port_get_subscription(&sport->c_src, &subs.dest); | |
1981 | if (p) { | |
1982 | result = 0; | |
1983 | subs = p->info; | |
1984 | } else | |
1985 | result = -ENOENT; | |
1986 | ||
1987 | __end: | |
1988 | if (sport) | |
1989 | snd_seq_port_unlock(sport); | |
1990 | if (sender) | |
1991 | snd_seq_client_unlock(sender); | |
1992 | if (result >= 0) { | |
1993 | if (copy_to_user(arg, &subs, sizeof(subs))) | |
1994 | return -EFAULT; | |
1995 | } | |
1996 | return result; | |
1997 | } | |
1998 | ||
1999 | ||
2000 | /* | |
2001 | * get subscription info - check only its presence | |
2002 | */ | |
c7e0b5bf TI |
2003 | static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, |
2004 | void __user *arg) | |
1da177e4 LT |
2005 | { |
2006 | int result = -ENXIO; | |
c7e0b5bf TI |
2007 | struct snd_seq_client *cptr = NULL; |
2008 | struct snd_seq_client_port *port = NULL; | |
2009 | struct snd_seq_query_subs subs; | |
2010 | struct snd_seq_port_subs_info *group; | |
1da177e4 LT |
2011 | struct list_head *p; |
2012 | int i; | |
2013 | ||
2014 | if (copy_from_user(&subs, arg, sizeof(subs))) | |
2015 | return -EFAULT; | |
2016 | ||
2017 | if ((cptr = snd_seq_client_use_ptr(subs.root.client)) == NULL) | |
2018 | goto __end; | |
2019 | if ((port = snd_seq_port_use_ptr(cptr, subs.root.port)) == NULL) | |
2020 | goto __end; | |
2021 | ||
2022 | switch (subs.type) { | |
2023 | case SNDRV_SEQ_QUERY_SUBS_READ: | |
2024 | group = &port->c_src; | |
2025 | break; | |
2026 | case SNDRV_SEQ_QUERY_SUBS_WRITE: | |
2027 | group = &port->c_dest; | |
2028 | break; | |
2029 | default: | |
2030 | goto __end; | |
2031 | } | |
2032 | ||
2033 | down_read(&group->list_mutex); | |
2034 | /* search for the subscriber */ | |
2035 | subs.num_subs = group->count; | |
2036 | i = 0; | |
2037 | result = -ENOENT; | |
2038 | list_for_each(p, &group->list_head) { | |
2039 | if (i++ == subs.index) { | |
2040 | /* found! */ | |
c7e0b5bf | 2041 | struct snd_seq_subscribers *s; |
1da177e4 | 2042 | if (subs.type == SNDRV_SEQ_QUERY_SUBS_READ) { |
c7e0b5bf | 2043 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
1da177e4 LT |
2044 | subs.addr = s->info.dest; |
2045 | } else { | |
c7e0b5bf | 2046 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
1da177e4 LT |
2047 | subs.addr = s->info.sender; |
2048 | } | |
2049 | subs.flags = s->info.flags; | |
2050 | subs.queue = s->info.queue; | |
2051 | result = 0; | |
2052 | break; | |
2053 | } | |
2054 | } | |
2055 | up_read(&group->list_mutex); | |
2056 | ||
2057 | __end: | |
2058 | if (port) | |
2059 | snd_seq_port_unlock(port); | |
2060 | if (cptr) | |
2061 | snd_seq_client_unlock(cptr); | |
2062 | if (result >= 0) { | |
2063 | if (copy_to_user(arg, &subs, sizeof(subs))) | |
2064 | return -EFAULT; | |
2065 | } | |
2066 | return result; | |
2067 | } | |
2068 | ||
2069 | ||
2070 | /* | |
2071 | * query next client | |
2072 | */ | |
c7e0b5bf TI |
2073 | static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client, |
2074 | void __user *arg) | |
1da177e4 | 2075 | { |
c7e0b5bf TI |
2076 | struct snd_seq_client *cptr = NULL; |
2077 | struct snd_seq_client_info info; | |
1da177e4 LT |
2078 | |
2079 | if (copy_from_user(&info, arg, sizeof(info))) | |
2080 | return -EFAULT; | |
2081 | ||
2082 | /* search for next client */ | |
2083 | info.client++; | |
2084 | if (info.client < 0) | |
2085 | info.client = 0; | |
2086 | for (; info.client < SNDRV_SEQ_MAX_CLIENTS; info.client++) { | |
2087 | cptr = snd_seq_client_use_ptr(info.client); | |
2088 | if (cptr) | |
2089 | break; /* found */ | |
2090 | } | |
2091 | if (cptr == NULL) | |
2092 | return -ENOENT; | |
2093 | ||
2094 | get_client_info(cptr, &info); | |
2095 | snd_seq_client_unlock(cptr); | |
2096 | ||
2097 | if (copy_to_user(arg, &info, sizeof(info))) | |
2098 | return -EFAULT; | |
2099 | return 0; | |
2100 | } | |
2101 | ||
2102 | /* | |
2103 | * query next port | |
2104 | */ | |
c7e0b5bf TI |
2105 | static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client, |
2106 | void __user *arg) | |
1da177e4 | 2107 | { |
c7e0b5bf TI |
2108 | struct snd_seq_client *cptr; |
2109 | struct snd_seq_client_port *port = NULL; | |
2110 | struct snd_seq_port_info info; | |
1da177e4 LT |
2111 | |
2112 | if (copy_from_user(&info, arg, sizeof(info))) | |
2113 | return -EFAULT; | |
2114 | cptr = snd_seq_client_use_ptr(info.addr.client); | |
2115 | if (cptr == NULL) | |
2116 | return -ENXIO; | |
2117 | ||
2118 | /* search for next port */ | |
2119 | info.addr.port++; | |
2120 | port = snd_seq_port_query_nearest(cptr, &info); | |
2121 | if (port == NULL) { | |
2122 | snd_seq_client_unlock(cptr); | |
2123 | return -ENOENT; | |
2124 | } | |
2125 | ||
2126 | /* get port info */ | |
2127 | info.addr = port->addr; | |
2128 | snd_seq_get_port_info(port, &info); | |
2129 | snd_seq_port_unlock(port); | |
2130 | snd_seq_client_unlock(cptr); | |
2131 | ||
2132 | if (copy_to_user(arg, &info, sizeof(info))) | |
2133 | return -EFAULT; | |
2134 | return 0; | |
2135 | } | |
2136 | ||
2137 | /* -------------------------------------------------------- */ | |
2138 | ||
2139 | static struct seq_ioctl_table { | |
2140 | unsigned int cmd; | |
c7e0b5bf | 2141 | int (*func)(struct snd_seq_client *client, void __user * arg); |
1da177e4 LT |
2142 | } ioctl_tables[] = { |
2143 | { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info }, | |
2144 | { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode }, | |
2145 | { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info }, | |
2146 | { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info }, | |
2147 | { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port }, | |
2148 | { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port }, | |
2149 | { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info }, | |
2150 | { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info }, | |
2151 | { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port }, | |
2152 | { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port }, | |
2153 | { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue }, | |
2154 | { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue }, | |
2155 | { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info }, | |
2156 | { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info }, | |
2157 | { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue }, | |
2158 | { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status }, | |
2159 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo }, | |
2160 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo }, | |
2161 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer }, | |
2162 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer }, | |
2163 | { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client }, | |
2164 | { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client }, | |
2165 | { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool }, | |
2166 | { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool }, | |
2167 | { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription }, | |
2168 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client }, | |
2169 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port }, | |
2170 | { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events }, | |
2171 | { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs }, | |
2172 | { 0, NULL }, | |
2173 | }; | |
2174 | ||
c7e0b5bf TI |
2175 | static int snd_seq_do_ioctl(struct snd_seq_client *client, unsigned int cmd, |
2176 | void __user *arg) | |
1da177e4 LT |
2177 | { |
2178 | struct seq_ioctl_table *p; | |
2179 | ||
2180 | switch (cmd) { | |
2181 | case SNDRV_SEQ_IOCTL_PVERSION: | |
2182 | /* return sequencer version number */ | |
2183 | return put_user(SNDRV_SEQ_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2184 | case SNDRV_SEQ_IOCTL_CLIENT_ID: | |
2185 | /* return the id of this client */ | |
2186 | return put_user(client->number, (int __user *)arg) ? -EFAULT : 0; | |
2187 | } | |
2188 | ||
2189 | if (! arg) | |
2190 | return -EFAULT; | |
2191 | for (p = ioctl_tables; p->cmd; p++) { | |
2192 | if (p->cmd == cmd) | |
2193 | return p->func(client, arg); | |
2194 | } | |
2195 | snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%2x)\n", | |
2196 | cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); | |
2197 | return -ENOTTY; | |
2198 | } | |
2199 | ||
2200 | ||
2201 | static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
2202 | { | |
c7e0b5bf | 2203 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
2204 | |
2205 | snd_assert(client != NULL, return -ENXIO); | |
2206 | ||
2207 | return snd_seq_do_ioctl(client, cmd, (void __user *) arg); | |
2208 | } | |
2209 | ||
2210 | #ifdef CONFIG_COMPAT | |
2211 | #include "seq_compat.c" | |
2212 | #else | |
2213 | #define snd_seq_ioctl_compat NULL | |
2214 | #endif | |
2215 | ||
2216 | /* -------------------------------------------------------- */ | |
2217 | ||
2218 | ||
2219 | /* exported to kernel modules */ | |
7b6d9245 CL |
2220 | int snd_seq_create_kernel_client(struct snd_card *card, int client_index, |
2221 | const char *name_fmt, ...) | |
1da177e4 | 2222 | { |
c7e0b5bf | 2223 | struct snd_seq_client *client; |
7b6d9245 | 2224 | va_list args; |
1da177e4 LT |
2225 | |
2226 | snd_assert(! in_interrupt(), return -EBUSY); | |
2227 | ||
aa1e77e6 | 2228 | if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD) |
1da177e4 | 2229 | return -EINVAL; |
aa1e77e6 | 2230 | if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS) |
1da177e4 | 2231 | return -EINVAL; |
1da177e4 | 2232 | |
1a60d4c5 | 2233 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 | 2234 | return -ERESTARTSYS; |
d001544d CL |
2235 | |
2236 | if (card) { | |
aa1e77e6 CL |
2237 | client_index += SNDRV_SEQ_GLOBAL_CLIENTS |
2238 | + card->number * SNDRV_SEQ_CLIENTS_PER_CARD; | |
2239 | if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) | |
d001544d CL |
2240 | client_index = -1; |
2241 | } | |
2242 | ||
1da177e4 | 2243 | /* empty write queue as default */ |
aa1e77e6 | 2244 | client = seq_create_client1(client_index, 0); |
1da177e4 | 2245 | if (client == NULL) { |
1a60d4c5 | 2246 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2247 | return -EBUSY; /* failure code */ |
2248 | } | |
2249 | usage_alloc(&client_usage, 1); | |
2250 | ||
83e8ad69 CL |
2251 | client->accept_input = 1; |
2252 | client->accept_output = 1; | |
1da177e4 | 2253 | |
7b6d9245 CL |
2254 | va_start(args, name_fmt); |
2255 | vsnprintf(client->name, sizeof(client->name), name_fmt, args); | |
2256 | va_end(args); | |
1da177e4 LT |
2257 | |
2258 | client->type = KERNEL_CLIENT; | |
1a60d4c5 | 2259 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2260 | |
2261 | /* make others aware this new client */ | |
2262 | snd_seq_system_client_ev_client_start(client->number); | |
2263 | ||
2264 | /* return client number to caller */ | |
2265 | return client->number; | |
2266 | } | |
2267 | ||
2268 | /* exported to kernel modules */ | |
2269 | int snd_seq_delete_kernel_client(int client) | |
2270 | { | |
c7e0b5bf | 2271 | struct snd_seq_client *ptr; |
1da177e4 LT |
2272 | |
2273 | snd_assert(! in_interrupt(), return -EBUSY); | |
2274 | ||
2275 | ptr = clientptr(client); | |
2276 | if (ptr == NULL) | |
2277 | return -EINVAL; | |
2278 | ||
2279 | seq_free_client(ptr); | |
2280 | kfree(ptr); | |
2281 | return 0; | |
2282 | } | |
2283 | ||
2284 | ||
2285 | /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue | |
2286 | * and snd_seq_kernel_client_enqueue_blocking | |
2287 | */ | |
c7e0b5bf | 2288 | static int kernel_client_enqueue(int client, struct snd_seq_event *ev, |
1da177e4 LT |
2289 | struct file *file, int blocking, |
2290 | int atomic, int hop) | |
2291 | { | |
c7e0b5bf | 2292 | struct snd_seq_client *cptr; |
1da177e4 LT |
2293 | int result; |
2294 | ||
2295 | snd_assert(ev != NULL, return -EINVAL); | |
2296 | ||
2297 | if (ev->type == SNDRV_SEQ_EVENT_NONE) | |
2298 | return 0; /* ignore this */ | |
2299 | if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR) | |
2300 | return -EINVAL; /* quoted events can't be enqueued */ | |
2301 | ||
2302 | /* fill in client number */ | |
2303 | ev->source.client = client; | |
2304 | ||
2305 | if (check_event_type_and_length(ev)) | |
2306 | return -EINVAL; | |
2307 | ||
2308 | cptr = snd_seq_client_use_ptr(client); | |
2309 | if (cptr == NULL) | |
2310 | return -EINVAL; | |
2311 | ||
2312 | if (! cptr->accept_output) | |
2313 | result = -EPERM; | |
2314 | else /* send it */ | |
2315 | result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop); | |
2316 | ||
2317 | snd_seq_client_unlock(cptr); | |
2318 | return result; | |
2319 | } | |
2320 | ||
2321 | /* | |
2322 | * exported, called by kernel clients to enqueue events (w/o blocking) | |
2323 | * | |
2324 | * RETURN VALUE: zero if succeed, negative if error | |
2325 | */ | |
c7e0b5bf | 2326 | int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2327 | int atomic, int hop) |
2328 | { | |
2329 | return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop); | |
2330 | } | |
2331 | ||
2332 | /* | |
2333 | * exported, called by kernel clients to enqueue events (with blocking) | |
2334 | * | |
2335 | * RETURN VALUE: zero if succeed, negative if error | |
2336 | */ | |
c7e0b5bf | 2337 | int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2338 | struct file *file, |
2339 | int atomic, int hop) | |
2340 | { | |
2341 | return kernel_client_enqueue(client, ev, file, 1, atomic, hop); | |
2342 | } | |
2343 | ||
2344 | ||
2345 | /* | |
2346 | * exported, called by kernel clients to dispatch events directly to other | |
2347 | * clients, bypassing the queues. Event time-stamp will be updated. | |
2348 | * | |
2349 | * RETURN VALUE: negative = delivery failed, | |
2350 | * zero, or positive: the number of delivered events | |
2351 | */ | |
c7e0b5bf | 2352 | int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2353 | int atomic, int hop) |
2354 | { | |
c7e0b5bf | 2355 | struct snd_seq_client *cptr; |
1da177e4 LT |
2356 | int result; |
2357 | ||
2358 | snd_assert(ev != NULL, return -EINVAL); | |
2359 | ||
2360 | /* fill in client number */ | |
2361 | ev->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
2362 | ev->source.client = client; | |
2363 | ||
2364 | if (check_event_type_and_length(ev)) | |
2365 | return -EINVAL; | |
2366 | ||
2367 | cptr = snd_seq_client_use_ptr(client); | |
2368 | if (cptr == NULL) | |
2369 | return -EINVAL; | |
2370 | ||
2371 | if (!cptr->accept_output) | |
2372 | result = -EPERM; | |
2373 | else | |
2374 | result = snd_seq_deliver_event(cptr, ev, atomic, hop); | |
2375 | ||
2376 | snd_seq_client_unlock(cptr); | |
2377 | return result; | |
2378 | } | |
2379 | ||
2380 | ||
2381 | /* | |
2382 | * exported, called by kernel clients to perform same functions as with | |
2383 | * userland ioctl() | |
2384 | */ | |
2385 | int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) | |
2386 | { | |
c7e0b5bf | 2387 | struct snd_seq_client *client; |
1da177e4 LT |
2388 | mm_segment_t fs; |
2389 | int result; | |
2390 | ||
2391 | client = clientptr(clientid); | |
2392 | if (client == NULL) | |
2393 | return -ENXIO; | |
2394 | fs = snd_enter_user(); | |
2395 | result = snd_seq_do_ioctl(client, cmd, (void __user *)arg); | |
2396 | snd_leave_user(fs); | |
2397 | return result; | |
2398 | } | |
2399 | ||
2400 | ||
2401 | /* exported (for OSS emulator) */ | |
2402 | int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait) | |
2403 | { | |
c7e0b5bf | 2404 | struct snd_seq_client *client; |
1da177e4 LT |
2405 | |
2406 | client = clientptr(clientid); | |
2407 | if (client == NULL) | |
2408 | return -ENXIO; | |
2409 | ||
2410 | if (! snd_seq_write_pool_allocated(client)) | |
2411 | return 1; | |
2412 | if (snd_seq_pool_poll_wait(client->pool, file, wait)) | |
2413 | return 1; | |
2414 | return 0; | |
2415 | } | |
2416 | ||
2417 | /*---------------------------------------------------------------------------*/ | |
2418 | ||
04f141a8 | 2419 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2420 | /* |
2421 | * /proc interface | |
2422 | */ | |
c7e0b5bf TI |
2423 | static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, |
2424 | struct snd_seq_port_subs_info *group, | |
2425 | int is_src, char *msg) | |
1da177e4 LT |
2426 | { |
2427 | struct list_head *p; | |
c7e0b5bf | 2428 | struct snd_seq_subscribers *s; |
1da177e4 LT |
2429 | int count = 0; |
2430 | ||
2431 | down_read(&group->list_mutex); | |
2432 | if (list_empty(&group->list_head)) { | |
2433 | up_read(&group->list_mutex); | |
2434 | return; | |
2435 | } | |
2436 | snd_iprintf(buffer, msg); | |
2437 | list_for_each(p, &group->list_head) { | |
2438 | if (is_src) | |
c7e0b5bf | 2439 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
1da177e4 | 2440 | else |
c7e0b5bf | 2441 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
1da177e4 LT |
2442 | if (count++) |
2443 | snd_iprintf(buffer, ", "); | |
2444 | snd_iprintf(buffer, "%d:%d", | |
2445 | is_src ? s->info.dest.client : s->info.sender.client, | |
2446 | is_src ? s->info.dest.port : s->info.sender.port); | |
2447 | if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) | |
2448 | snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue); | |
2449 | if (group->exclusive) | |
2450 | snd_iprintf(buffer, "[ex]"); | |
2451 | } | |
2452 | up_read(&group->list_mutex); | |
2453 | snd_iprintf(buffer, "\n"); | |
2454 | } | |
2455 | ||
2456 | #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-') | |
2457 | #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-') | |
2458 | #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e') | |
2459 | ||
2460 | #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-') | |
2461 | ||
c7e0b5bf TI |
2462 | static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, |
2463 | struct snd_seq_client *client) | |
1da177e4 LT |
2464 | { |
2465 | struct list_head *l; | |
2466 | ||
1a60d4c5 | 2467 | mutex_lock(&client->ports_mutex); |
1da177e4 | 2468 | list_for_each(l, &client->ports_list_head) { |
c7e0b5bf | 2469 | struct snd_seq_client_port *p = list_entry(l, struct snd_seq_client_port, list); |
1da177e4 LT |
2470 | snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", |
2471 | p->addr.port, p->name, | |
2472 | FLAG_PERM_RD(p->capability), | |
2473 | FLAG_PERM_WR(p->capability), | |
2474 | FLAG_PERM_EX(p->capability), | |
2475 | FLAG_PERM_DUPLEX(p->capability)); | |
2476 | snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); | |
2477 | snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); | |
2478 | } | |
1a60d4c5 | 2479 | mutex_unlock(&client->ports_mutex); |
1da177e4 LT |
2480 | } |
2481 | ||
2482 | ||
c7e0b5bf TI |
2483 | void snd_seq_info_pool(struct snd_info_buffer *buffer, |
2484 | struct snd_seq_pool *pool, char *space); | |
2485 | ||
1da177e4 | 2486 | /* exported to seq_info.c */ |
c7e0b5bf TI |
2487 | void snd_seq_info_clients_read(struct snd_info_entry *entry, |
2488 | struct snd_info_buffer *buffer) | |
1da177e4 | 2489 | { |
1da177e4 | 2490 | int c; |
c7e0b5bf | 2491 | struct snd_seq_client *client; |
1da177e4 LT |
2492 | |
2493 | snd_iprintf(buffer, "Client info\n"); | |
2494 | snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur); | |
2495 | snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak); | |
2496 | snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS); | |
2497 | snd_iprintf(buffer, "\n"); | |
2498 | ||
2499 | /* list the client table */ | |
2500 | for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) { | |
2501 | client = snd_seq_client_use_ptr(c); | |
2502 | if (client == NULL) | |
2503 | continue; | |
2504 | if (client->type == NO_CLIENT) { | |
2505 | snd_seq_client_unlock(client); | |
2506 | continue; | |
2507 | } | |
2508 | ||
2509 | snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n", | |
2510 | c, client->name, | |
2511 | client->type == USER_CLIENT ? "User" : "Kernel"); | |
2512 | snd_seq_info_dump_ports(buffer, client); | |
2513 | if (snd_seq_write_pool_allocated(client)) { | |
2514 | snd_iprintf(buffer, " Output pool :\n"); | |
2515 | snd_seq_info_pool(buffer, client->pool, " "); | |
2516 | } | |
2517 | if (client->type == USER_CLIENT && client->data.user.fifo && | |
2518 | client->data.user.fifo->pool) { | |
2519 | snd_iprintf(buffer, " Input pool :\n"); | |
2520 | snd_seq_info_pool(buffer, client->data.user.fifo->pool, " "); | |
2521 | } | |
2522 | snd_seq_client_unlock(client); | |
2523 | } | |
2524 | } | |
04f141a8 | 2525 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2526 | |
2527 | /*---------------------------------------------------------------------------*/ | |
2528 | ||
2529 | ||
2530 | /* | |
2531 | * REGISTRATION PART | |
2532 | */ | |
2533 | ||
2534 | static struct file_operations snd_seq_f_ops = | |
2535 | { | |
2536 | .owner = THIS_MODULE, | |
2537 | .read = snd_seq_read, | |
2538 | .write = snd_seq_write, | |
2539 | .open = snd_seq_open, | |
2540 | .release = snd_seq_release, | |
2541 | .poll = snd_seq_poll, | |
2542 | .unlocked_ioctl = snd_seq_ioctl, | |
2543 | .compat_ioctl = snd_seq_ioctl_compat, | |
2544 | }; | |
2545 | ||
1da177e4 LT |
2546 | /* |
2547 | * register sequencer device | |
2548 | */ | |
2549 | int __init snd_sequencer_device_init(void) | |
2550 | { | |
2551 | int err; | |
2552 | ||
1a60d4c5 | 2553 | if (mutex_lock_interruptible(®ister_mutex)) |
1da177e4 LT |
2554 | return -ERESTARTSYS; |
2555 | ||
2af677fc | 2556 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, |
f87135f5 | 2557 | &snd_seq_f_ops, NULL, "seq")) < 0) { |
1a60d4c5 | 2558 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2559 | return err; |
2560 | } | |
2561 | ||
1a60d4c5 | 2562 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2563 | |
2564 | return 0; | |
2565 | } | |
2566 | ||
2567 | ||
2568 | ||
2569 | /* | |
2570 | * unregister sequencer device | |
2571 | */ | |
2572 | void __exit snd_sequencer_device_done(void) | |
2573 | { | |
2574 | snd_unregister_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0); | |
2575 | } |