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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * ALSA sequencer Client Manager | |
4 | * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl> | |
c1017a4c | 5 | * Jaroslav Kysela <perex@perex.cz> |
1da177e4 | 6 | * Takashi Iwai <tiwai@suse.de> |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 | 9 | #include <linux/init.h> |
d81a6d71 | 10 | #include <linux/export.h> |
1da177e4 LT |
11 | #include <linux/slab.h> |
12 | #include <sound/core.h> | |
13 | #include <sound/minors.h> | |
14 | #include <linux/kmod.h> | |
15 | ||
16 | #include <sound/seq_kernel.h> | |
17 | #include "seq_clientmgr.h" | |
18 | #include "seq_memory.h" | |
19 | #include "seq_queue.h" | |
20 | #include "seq_timer.h" | |
21 | #include "seq_info.h" | |
22 | #include "seq_system.h" | |
23 | #include <sound/seq_device.h> | |
24 | #ifdef CONFIG_COMPAT | |
25 | #include <linux/compat.h> | |
26 | #endif | |
27 | ||
28 | /* Client Manager | |
29 | ||
30 | * this module handles the connections of userland and kernel clients | |
31 | * | |
32 | */ | |
33 | ||
aa1e77e6 CL |
34 | /* |
35 | * There are four ranges of client numbers (last two shared): | |
36 | * 0..15: global clients | |
37 | * 16..127: statically allocated client numbers for cards 0..27 | |
38 | * 128..191: dynamically allocated client numbers for cards 28..31 | |
39 | * 128..191: dynamically allocated client numbers for applications | |
40 | */ | |
41 | ||
42 | /* number of kernel non-card clients */ | |
43 | #define SNDRV_SEQ_GLOBAL_CLIENTS 16 | |
44 | /* clients per cards, for static clients */ | |
45 | #define SNDRV_SEQ_CLIENTS_PER_CARD 4 | |
46 | /* dynamically allocated client numbers (both kernel drivers and user space) */ | |
47 | #define SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN 128 | |
d001544d | 48 | |
1da177e4 LT |
49 | #define SNDRV_SEQ_LFLG_INPUT 0x0001 |
50 | #define SNDRV_SEQ_LFLG_OUTPUT 0x0002 | |
51 | #define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT) | |
52 | ||
53 | static DEFINE_SPINLOCK(clients_lock); | |
1a60d4c5 | 54 | static DEFINE_MUTEX(register_mutex); |
1da177e4 LT |
55 | |
56 | /* | |
57 | * client table | |
58 | */ | |
59 | static char clienttablock[SNDRV_SEQ_MAX_CLIENTS]; | |
c7e0b5bf TI |
60 | static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS]; |
61 | static struct snd_seq_usage client_usage; | |
1da177e4 LT |
62 | |
63 | /* | |
64 | * prototypes | |
65 | */ | |
c7e0b5bf TI |
66 | static int bounce_error_event(struct snd_seq_client *client, |
67 | struct snd_seq_event *event, | |
68 | int err, int atomic, int hop); | |
69 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, | |
70 | struct snd_seq_event *event, | |
71 | int filter, int atomic, int hop); | |
1da177e4 | 72 | |
1da177e4 LT |
73 | /* |
74 | */ | |
75 | static inline unsigned short snd_seq_file_flags(struct file *file) | |
76 | { | |
77 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
78 | case FMODE_WRITE: | |
79 | return SNDRV_SEQ_LFLG_OUTPUT; | |
80 | case FMODE_READ: | |
81 | return SNDRV_SEQ_LFLG_INPUT; | |
82 | default: | |
83 | return SNDRV_SEQ_LFLG_OPEN; | |
84 | } | |
85 | } | |
86 | ||
c7e0b5bf | 87 | static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client) |
1da177e4 LT |
88 | { |
89 | return snd_seq_total_cells(client->pool) > 0; | |
90 | } | |
91 | ||
92 | /* return pointer to client structure for specified id */ | |
c7e0b5bf | 93 | static struct snd_seq_client *clientptr(int clientid) |
1da177e4 LT |
94 | { |
95 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { | |
04cc79a0 | 96 | pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n", |
c7e0b5bf | 97 | clientid); |
1da177e4 LT |
98 | return NULL; |
99 | } | |
100 | return clienttab[clientid]; | |
101 | } | |
102 | ||
c7e0b5bf | 103 | struct snd_seq_client *snd_seq_client_use_ptr(int clientid) |
1da177e4 LT |
104 | { |
105 | unsigned long flags; | |
c7e0b5bf | 106 | struct snd_seq_client *client; |
1da177e4 LT |
107 | |
108 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { | |
04cc79a0 | 109 | pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n", |
c7e0b5bf | 110 | clientid); |
1da177e4 LT |
111 | return NULL; |
112 | } | |
113 | spin_lock_irqsave(&clients_lock, flags); | |
114 | client = clientptr(clientid); | |
115 | if (client) | |
116 | goto __lock; | |
117 | if (clienttablock[clientid]) { | |
118 | spin_unlock_irqrestore(&clients_lock, flags); | |
119 | return NULL; | |
120 | } | |
121 | spin_unlock_irqrestore(&clients_lock, flags); | |
ee2da997 | 122 | #ifdef CONFIG_MODULES |
0d63e4f9 | 123 | if (!in_interrupt()) { |
aa1e77e6 | 124 | static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS]; |
1da177e4 | 125 | static char card_requested[SNDRV_CARDS]; |
aa1e77e6 | 126 | if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) { |
1da177e4 LT |
127 | int idx; |
128 | ||
0d63e4f9 | 129 | if (!client_requested[clientid]) { |
1da177e4 | 130 | client_requested[clientid] = 1; |
aa1e77e6 | 131 | for (idx = 0; idx < 15; idx++) { |
1da177e4 LT |
132 | if (seq_client_load[idx] < 0) |
133 | break; | |
134 | if (seq_client_load[idx] == clientid) { | |
c7e0b5bf TI |
135 | request_module("snd-seq-client-%i", |
136 | clientid); | |
1da177e4 LT |
137 | break; |
138 | } | |
139 | } | |
140 | } | |
aa1e77e6 CL |
141 | } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) { |
142 | int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) / | |
143 | SNDRV_SEQ_CLIENTS_PER_CARD; | |
1da177e4 LT |
144 | if (card < snd_ecards_limit) { |
145 | if (! card_requested[card]) { | |
146 | card_requested[card] = 1; | |
147 | snd_request_card(card); | |
148 | } | |
149 | snd_seq_device_load_drivers(); | |
150 | } | |
151 | } | |
152 | spin_lock_irqsave(&clients_lock, flags); | |
153 | client = clientptr(clientid); | |
154 | if (client) | |
155 | goto __lock; | |
156 | spin_unlock_irqrestore(&clients_lock, flags); | |
157 | } | |
158 | #endif | |
159 | return NULL; | |
160 | ||
161 | __lock: | |
162 | snd_use_lock_use(&client->use_lock); | |
163 | spin_unlock_irqrestore(&clients_lock, flags); | |
164 | return client; | |
165 | } | |
166 | ||
6b580f52 TI |
167 | /* Take refcount and perform ioctl_mutex lock on the given client; |
168 | * used only for OSS sequencer | |
169 | * Unlock via snd_seq_client_ioctl_unlock() below | |
170 | */ | |
171 | bool snd_seq_client_ioctl_lock(int clientid) | |
172 | { | |
173 | struct snd_seq_client *client; | |
174 | ||
175 | client = snd_seq_client_use_ptr(clientid); | |
176 | if (!client) | |
177 | return false; | |
178 | mutex_lock(&client->ioctl_mutex); | |
b5fd12d6 | 179 | /* The client isn't unrefed here; see snd_seq_client_ioctl_unlock() */ |
6b580f52 TI |
180 | return true; |
181 | } | |
182 | EXPORT_SYMBOL_GPL(snd_seq_client_ioctl_lock); | |
183 | ||
184 | /* Unlock and unref the given client; for OSS sequencer use only */ | |
185 | void snd_seq_client_ioctl_unlock(int clientid) | |
186 | { | |
187 | struct snd_seq_client *client; | |
188 | ||
189 | client = snd_seq_client_use_ptr(clientid); | |
190 | if (WARN_ON(!client)) | |
191 | return; | |
192 | mutex_unlock(&client->ioctl_mutex); | |
b5fd12d6 TI |
193 | /* The doubly unrefs below are intentional; the first one releases the |
194 | * leftover from snd_seq_client_ioctl_lock() above, and the second one | |
195 | * is for releasing snd_seq_client_use_ptr() in this function | |
196 | */ | |
197 | snd_seq_client_unlock(client); | |
6b580f52 TI |
198 | snd_seq_client_unlock(client); |
199 | } | |
200 | EXPORT_SYMBOL_GPL(snd_seq_client_ioctl_unlock); | |
201 | ||
c7e0b5bf | 202 | static void usage_alloc(struct snd_seq_usage *res, int num) |
1da177e4 LT |
203 | { |
204 | res->cur += num; | |
205 | if (res->cur > res->peak) | |
206 | res->peak = res->cur; | |
207 | } | |
208 | ||
c7e0b5bf | 209 | static void usage_free(struct snd_seq_usage *res, int num) |
1da177e4 LT |
210 | { |
211 | res->cur -= num; | |
212 | } | |
213 | ||
214 | /* initialise data structures */ | |
215 | int __init client_init_data(void) | |
216 | { | |
217 | /* zap out the client table */ | |
218 | memset(&clienttablock, 0, sizeof(clienttablock)); | |
219 | memset(&clienttab, 0, sizeof(clienttab)); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | ||
aa1e77e6 | 224 | static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) |
1da177e4 | 225 | { |
1da177e4 | 226 | int c; |
c7e0b5bf | 227 | struct snd_seq_client *client; |
1da177e4 LT |
228 | |
229 | /* init client data */ | |
ecca82b4 | 230 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
1da177e4 LT |
231 | if (client == NULL) |
232 | return NULL; | |
233 | client->pool = snd_seq_pool_new(poolsize); | |
234 | if (client->pool == NULL) { | |
235 | kfree(client); | |
236 | return NULL; | |
237 | } | |
238 | client->type = NO_CLIENT; | |
239 | snd_use_lock_init(&client->use_lock); | |
240 | rwlock_init(&client->ports_lock); | |
1a60d4c5 | 241 | mutex_init(&client->ports_mutex); |
1da177e4 | 242 | INIT_LIST_HEAD(&client->ports_list_head); |
b3defb79 | 243 | mutex_init(&client->ioctl_mutex); |
1da177e4 LT |
244 | |
245 | /* find free slot in the client table */ | |
f823b8a7 | 246 | spin_lock_irq(&clients_lock); |
1da177e4 | 247 | if (client_index < 0) { |
aa1e77e6 CL |
248 | for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN; |
249 | c < SNDRV_SEQ_MAX_CLIENTS; | |
250 | c++) { | |
1da177e4 LT |
251 | if (clienttab[c] || clienttablock[c]) |
252 | continue; | |
253 | clienttab[client->number = c] = client; | |
f823b8a7 | 254 | spin_unlock_irq(&clients_lock); |
1da177e4 LT |
255 | return client; |
256 | } | |
257 | } else { | |
258 | if (clienttab[client_index] == NULL && !clienttablock[client_index]) { | |
259 | clienttab[client->number = client_index] = client; | |
f823b8a7 | 260 | spin_unlock_irq(&clients_lock); |
1da177e4 LT |
261 | return client; |
262 | } | |
263 | } | |
f823b8a7 | 264 | spin_unlock_irq(&clients_lock); |
1da177e4 LT |
265 | snd_seq_pool_delete(&client->pool); |
266 | kfree(client); | |
267 | return NULL; /* no free slot found or busy, return failure code */ | |
268 | } | |
269 | ||
270 | ||
c7e0b5bf | 271 | static int seq_free_client1(struct snd_seq_client *client) |
1da177e4 | 272 | { |
7eaa943c TI |
273 | if (!client) |
274 | return 0; | |
f823b8a7 | 275 | spin_lock_irq(&clients_lock); |
1da177e4 LT |
276 | clienttablock[client->number] = 1; |
277 | clienttab[client->number] = NULL; | |
f823b8a7 | 278 | spin_unlock_irq(&clients_lock); |
a2ff19f7 TI |
279 | snd_seq_delete_all_ports(client); |
280 | snd_seq_queue_client_leave(client->number); | |
1da177e4 LT |
281 | snd_use_lock_sync(&client->use_lock); |
282 | snd_seq_queue_client_termination(client->number); | |
283 | if (client->pool) | |
284 | snd_seq_pool_delete(&client->pool); | |
f823b8a7 | 285 | spin_lock_irq(&clients_lock); |
1da177e4 | 286 | clienttablock[client->number] = 0; |
f823b8a7 | 287 | spin_unlock_irq(&clients_lock); |
1da177e4 LT |
288 | return 0; |
289 | } | |
290 | ||
291 | ||
c7e0b5bf | 292 | static void seq_free_client(struct snd_seq_client * client) |
1da177e4 | 293 | { |
1a60d4c5 | 294 | mutex_lock(®ister_mutex); |
1da177e4 LT |
295 | switch (client->type) { |
296 | case NO_CLIENT: | |
04cc79a0 TI |
297 | pr_warn("ALSA: seq: Trying to free unused client %d\n", |
298 | client->number); | |
1da177e4 LT |
299 | break; |
300 | case USER_CLIENT: | |
301 | case KERNEL_CLIENT: | |
302 | seq_free_client1(client); | |
303 | usage_free(&client_usage, 1); | |
304 | break; | |
305 | ||
306 | default: | |
04cc79a0 | 307 | pr_err("ALSA: seq: Trying to free client %d with undefined type = %d\n", |
c7e0b5bf | 308 | client->number, client->type); |
1da177e4 | 309 | } |
1a60d4c5 | 310 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
311 | |
312 | snd_seq_system_client_ev_client_exit(client->number); | |
313 | } | |
314 | ||
315 | ||
316 | ||
317 | /* -------------------------------------------------------- */ | |
318 | ||
319 | /* create a user client */ | |
320 | static int snd_seq_open(struct inode *inode, struct file *file) | |
321 | { | |
322 | int c, mode; /* client id */ | |
c7e0b5bf TI |
323 | struct snd_seq_client *client; |
324 | struct snd_seq_user_client *user; | |
02f4865f TI |
325 | int err; |
326 | ||
c5bf68fe | 327 | err = stream_open(inode, file); |
02f4865f TI |
328 | if (err < 0) |
329 | return err; | |
1da177e4 | 330 | |
04702e8d | 331 | mutex_lock(®ister_mutex); |
aa1e77e6 | 332 | client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS); |
04702e8d | 333 | if (!client) { |
1a60d4c5 | 334 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
335 | return -ENOMEM; /* failure code */ |
336 | } | |
337 | ||
338 | mode = snd_seq_file_flags(file); | |
339 | if (mode & SNDRV_SEQ_LFLG_INPUT) | |
340 | client->accept_input = 1; | |
341 | if (mode & SNDRV_SEQ_LFLG_OUTPUT) | |
342 | client->accept_output = 1; | |
343 | ||
344 | user = &client->data.user; | |
345 | user->fifo = NULL; | |
346 | user->fifo_pool_size = 0; | |
347 | ||
348 | if (mode & SNDRV_SEQ_LFLG_INPUT) { | |
349 | user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS; | |
350 | user->fifo = snd_seq_fifo_new(user->fifo_pool_size); | |
351 | if (user->fifo == NULL) { | |
352 | seq_free_client1(client); | |
353 | kfree(client); | |
1a60d4c5 | 354 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
355 | return -ENOMEM; |
356 | } | |
357 | } | |
358 | ||
359 | usage_alloc(&client_usage, 1); | |
360 | client->type = USER_CLIENT; | |
1a60d4c5 | 361 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
362 | |
363 | c = client->number; | |
364 | file->private_data = client; | |
365 | ||
366 | /* fill client data */ | |
367 | user->file = file; | |
368 | sprintf(client->name, "Client-%d", c); | |
a1ce94d0 | 369 | client->data.user.owner = get_pid(task_pid(current)); |
1da177e4 LT |
370 | |
371 | /* make others aware this new client */ | |
372 | snd_seq_system_client_ev_client_start(c); | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | /* delete a user client */ | |
378 | static int snd_seq_release(struct inode *inode, struct file *file) | |
379 | { | |
c7e0b5bf | 380 | struct snd_seq_client *client = file->private_data; |
1da177e4 LT |
381 | |
382 | if (client) { | |
383 | seq_free_client(client); | |
384 | if (client->data.user.fifo) | |
385 | snd_seq_fifo_delete(&client->data.user.fifo); | |
a1ce94d0 | 386 | put_pid(client->data.user.owner); |
1da177e4 LT |
387 | kfree(client); |
388 | } | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
393 | ||
394 | /* handle client read() */ | |
395 | /* possible error values: | |
396 | * -ENXIO invalid client or file open mode | |
397 | * -ENOSPC FIFO overflow (the flag is cleared after this error report) | |
398 | * -EINVAL no enough user-space buffer to write the whole event | |
399 | * -EFAULT seg. fault during copy to user space | |
400 | */ | |
c7e0b5bf TI |
401 | static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count, |
402 | loff_t *offset) | |
1da177e4 | 403 | { |
c7e0b5bf TI |
404 | struct snd_seq_client *client = file->private_data; |
405 | struct snd_seq_fifo *fifo; | |
1da177e4 LT |
406 | int err; |
407 | long result = 0; | |
c7e0b5bf | 408 | struct snd_seq_event_cell *cell; |
1da177e4 LT |
409 | |
410 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT)) | |
411 | return -ENXIO; | |
412 | ||
96d4f267 | 413 | if (!access_ok(buf, count)) |
1da177e4 LT |
414 | return -EFAULT; |
415 | ||
416 | /* check client structures are in place */ | |
7eaa943c TI |
417 | if (snd_BUG_ON(!client)) |
418 | return -ENXIO; | |
1da177e4 LT |
419 | |
420 | if (!client->accept_input || (fifo = client->data.user.fifo) == NULL) | |
421 | return -ENXIO; | |
422 | ||
423 | if (atomic_read(&fifo->overflow) > 0) { | |
424 | /* buffer overflow is detected */ | |
425 | snd_seq_fifo_clear(fifo); | |
426 | /* return error code */ | |
427 | return -ENOSPC; | |
428 | } | |
429 | ||
430 | cell = NULL; | |
431 | err = 0; | |
432 | snd_seq_fifo_lock(fifo); | |
433 | ||
434 | /* while data available in queue */ | |
c7e0b5bf | 435 | while (count >= sizeof(struct snd_seq_event)) { |
1da177e4 LT |
436 | int nonblock; |
437 | ||
438 | nonblock = (file->f_flags & O_NONBLOCK) || result > 0; | |
439 | if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) { | |
440 | break; | |
441 | } | |
442 | if (snd_seq_ev_is_variable(&cell->event)) { | |
c7e0b5bf | 443 | struct snd_seq_event tmpev; |
1da177e4 LT |
444 | tmpev = cell->event; |
445 | tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK; | |
c7e0b5bf | 446 | if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) { |
1da177e4 LT |
447 | err = -EFAULT; |
448 | break; | |
449 | } | |
c7e0b5bf TI |
450 | count -= sizeof(struct snd_seq_event); |
451 | buf += sizeof(struct snd_seq_event); | |
4d23359b CL |
452 | err = snd_seq_expand_var_event(&cell->event, count, |
453 | (char __force *)buf, 0, | |
c7e0b5bf | 454 | sizeof(struct snd_seq_event)); |
1da177e4 LT |
455 | if (err < 0) |
456 | break; | |
457 | result += err; | |
458 | count -= err; | |
459 | buf += err; | |
460 | } else { | |
c7e0b5bf | 461 | if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) { |
1da177e4 LT |
462 | err = -EFAULT; |
463 | break; | |
464 | } | |
c7e0b5bf TI |
465 | count -= sizeof(struct snd_seq_event); |
466 | buf += sizeof(struct snd_seq_event); | |
1da177e4 LT |
467 | } |
468 | snd_seq_cell_free(cell); | |
469 | cell = NULL; /* to be sure */ | |
c7e0b5bf | 470 | result += sizeof(struct snd_seq_event); |
1da177e4 LT |
471 | } |
472 | ||
473 | if (err < 0) { | |
474 | if (cell) | |
475 | snd_seq_fifo_cell_putback(fifo, cell); | |
476 | if (err == -EAGAIN && result > 0) | |
477 | err = 0; | |
478 | } | |
479 | snd_seq_fifo_unlock(fifo); | |
480 | ||
481 | return (err < 0) ? err : result; | |
482 | } | |
483 | ||
484 | ||
485 | /* | |
486 | * check access permission to the port | |
487 | */ | |
c7e0b5bf | 488 | static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags) |
1da177e4 LT |
489 | { |
490 | if ((port->capability & flags) != flags) | |
491 | return 0; | |
492 | return flags; | |
493 | } | |
494 | ||
495 | /* | |
496 | * check if the destination client is available, and return the pointer | |
497 | * if filter is non-zero, client filter bitmap is tested. | |
498 | */ | |
c7e0b5bf TI |
499 | static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event, |
500 | int filter) | |
1da177e4 | 501 | { |
c7e0b5bf | 502 | struct snd_seq_client *dest; |
1da177e4 LT |
503 | |
504 | dest = snd_seq_client_use_ptr(event->dest.client); | |
505 | if (dest == NULL) | |
506 | return NULL; | |
507 | if (! dest->accept_input) | |
508 | goto __not_avail; | |
509 | if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) && | |
510 | ! test_bit(event->type, dest->event_filter)) | |
511 | goto __not_avail; | |
512 | if (filter && !(dest->filter & filter)) | |
513 | goto __not_avail; | |
514 | ||
515 | return dest; /* ok - accessible */ | |
516 | __not_avail: | |
517 | snd_seq_client_unlock(dest); | |
518 | return NULL; | |
519 | } | |
520 | ||
521 | ||
522 | /* | |
523 | * Return the error event. | |
524 | * | |
525 | * If the receiver client is a user client, the original event is | |
526 | * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If | |
527 | * the original event is also variable length, the external data is | |
528 | * copied after the event record. | |
529 | * If the receiver client is a kernel client, the original event is | |
530 | * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra | |
531 | * kmalloc. | |
532 | */ | |
c7e0b5bf TI |
533 | static int bounce_error_event(struct snd_seq_client *client, |
534 | struct snd_seq_event *event, | |
1da177e4 LT |
535 | int err, int atomic, int hop) |
536 | { | |
c7e0b5bf | 537 | struct snd_seq_event bounce_ev; |
1da177e4 LT |
538 | int result; |
539 | ||
540 | if (client == NULL || | |
541 | ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) || | |
542 | ! client->accept_input) | |
543 | return 0; /* ignored */ | |
544 | ||
545 | /* set up quoted error */ | |
546 | memset(&bounce_ev, 0, sizeof(bounce_ev)); | |
547 | bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR; | |
548 | bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED; | |
549 | bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT; | |
550 | bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; | |
551 | bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE; | |
552 | bounce_ev.dest.client = client->number; | |
553 | bounce_ev.dest.port = event->source.port; | |
554 | bounce_ev.data.quote.origin = event->dest; | |
555 | bounce_ev.data.quote.event = event; | |
556 | bounce_ev.data.quote.value = -err; /* use positive value */ | |
557 | result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1); | |
558 | if (result < 0) { | |
559 | client->event_lost++; | |
560 | return result; | |
561 | } | |
562 | ||
563 | return result; | |
564 | } | |
565 | ||
566 | ||
567 | /* | |
568 | * rewrite the time-stamp of the event record with the curren time | |
569 | * of the given queue. | |
570 | * return non-zero if updated. | |
571 | */ | |
c7e0b5bf TI |
572 | static int update_timestamp_of_queue(struct snd_seq_event *event, |
573 | int queue, int real_time) | |
1da177e4 | 574 | { |
c7e0b5bf | 575 | struct snd_seq_queue *q; |
1da177e4 LT |
576 | |
577 | q = queueptr(queue); | |
578 | if (! q) | |
579 | return 0; | |
580 | event->queue = queue; | |
581 | event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK; | |
582 | if (real_time) { | |
583 | event->time.time = snd_seq_timer_get_cur_time(q->timer); | |
584 | event->flags |= SNDRV_SEQ_TIME_STAMP_REAL; | |
585 | } else { | |
586 | event->time.tick = snd_seq_timer_get_cur_tick(q->timer); | |
587 | event->flags |= SNDRV_SEQ_TIME_STAMP_TICK; | |
588 | } | |
589 | queuefree(q); | |
590 | return 1; | |
591 | } | |
592 | ||
593 | ||
594 | /* | |
595 | * deliver an event to the specified destination. | |
596 | * if filter is non-zero, client filter bitmap is tested. | |
597 | * | |
598 | * RETURN VALUE: 0 : if succeeded | |
599 | * <0 : error | |
600 | */ | |
c7e0b5bf TI |
601 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
602 | struct snd_seq_event *event, | |
1da177e4 LT |
603 | int filter, int atomic, int hop) |
604 | { | |
c7e0b5bf TI |
605 | struct snd_seq_client *dest = NULL; |
606 | struct snd_seq_client_port *dest_port = NULL; | |
1da177e4 LT |
607 | int result = -ENOENT; |
608 | int direct; | |
609 | ||
610 | direct = snd_seq_ev_is_direct(event); | |
611 | ||
612 | dest = get_event_dest_client(event, filter); | |
613 | if (dest == NULL) | |
614 | goto __skip; | |
615 | dest_port = snd_seq_port_use_ptr(dest, event->dest.port); | |
616 | if (dest_port == NULL) | |
617 | goto __skip; | |
618 | ||
619 | /* check permission */ | |
620 | if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) { | |
621 | result = -EPERM; | |
622 | goto __skip; | |
623 | } | |
624 | ||
625 | if (dest_port->timestamping) | |
626 | update_timestamp_of_queue(event, dest_port->time_queue, | |
627 | dest_port->time_real); | |
628 | ||
629 | switch (dest->type) { | |
630 | case USER_CLIENT: | |
631 | if (dest->data.user.fifo) | |
632 | result = snd_seq_fifo_event_in(dest->data.user.fifo, event); | |
633 | break; | |
634 | ||
635 | case KERNEL_CLIENT: | |
636 | if (dest_port->event_input == NULL) | |
637 | break; | |
c7e0b5bf TI |
638 | result = dest_port->event_input(event, direct, |
639 | dest_port->private_data, | |
640 | atomic, hop); | |
1da177e4 LT |
641 | break; |
642 | default: | |
643 | break; | |
644 | } | |
645 | ||
646 | __skip: | |
647 | if (dest_port) | |
648 | snd_seq_port_unlock(dest_port); | |
649 | if (dest) | |
650 | snd_seq_client_unlock(dest); | |
651 | ||
652 | if (result < 0 && !direct) { | |
653 | result = bounce_error_event(client, event, result, atomic, hop); | |
654 | } | |
655 | return result; | |
656 | } | |
657 | ||
658 | ||
659 | /* | |
660 | * send the event to all subscribers: | |
661 | */ | |
c7e0b5bf TI |
662 | static int deliver_to_subscribers(struct snd_seq_client *client, |
663 | struct snd_seq_event *event, | |
1da177e4 LT |
664 | int atomic, int hop) |
665 | { | |
c7e0b5bf | 666 | struct snd_seq_subscribers *subs; |
27423257 | 667 | int err, result = 0, num_ev = 0; |
c7e0b5bf TI |
668 | struct snd_seq_event event_saved; |
669 | struct snd_seq_client_port *src_port; | |
c7e0b5bf | 670 | struct snd_seq_port_subs_info *grp; |
1da177e4 LT |
671 | |
672 | src_port = snd_seq_port_use_ptr(client, event->source.port); | |
673 | if (src_port == NULL) | |
674 | return -EINVAL; /* invalid source port */ | |
675 | /* save original event record */ | |
676 | event_saved = *event; | |
677 | grp = &src_port->c_src; | |
678 | ||
679 | /* lock list */ | |
680 | if (atomic) | |
681 | read_lock(&grp->list_lock); | |
682 | else | |
1f20f9ff | 683 | down_read_nested(&grp->list_mutex, hop); |
9244b2c3 | 684 | list_for_each_entry(subs, &grp->list_head, src_list) { |
7f0973e9 TI |
685 | /* both ports ready? */ |
686 | if (atomic_read(&subs->ref_count) != 2) | |
687 | continue; | |
1da177e4 LT |
688 | event->dest = subs->info.dest; |
689 | if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) | |
690 | /* convert time according to flag with subscription */ | |
691 | update_timestamp_of_queue(event, subs->info.queue, | |
692 | subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL); | |
693 | err = snd_seq_deliver_single_event(client, event, | |
694 | 0, atomic, hop); | |
27423257 AG |
695 | if (err < 0) { |
696 | /* save first error that occurs and continue */ | |
697 | if (!result) | |
698 | result = err; | |
699 | continue; | |
700 | } | |
1da177e4 LT |
701 | num_ev++; |
702 | /* restore original event record */ | |
703 | *event = event_saved; | |
704 | } | |
705 | if (atomic) | |
706 | read_unlock(&grp->list_lock); | |
707 | else | |
708 | up_read(&grp->list_mutex); | |
709 | *event = event_saved; /* restore */ | |
710 | snd_seq_port_unlock(src_port); | |
27423257 | 711 | return (result < 0) ? result : num_ev; |
1da177e4 LT |
712 | } |
713 | ||
714 | ||
715 | #ifdef SUPPORT_BROADCAST | |
716 | /* | |
717 | * broadcast to all ports: | |
718 | */ | |
c7e0b5bf TI |
719 | static int port_broadcast_event(struct snd_seq_client *client, |
720 | struct snd_seq_event *event, | |
1da177e4 LT |
721 | int atomic, int hop) |
722 | { | |
27423257 | 723 | int num_ev = 0, err, result = 0; |
c7e0b5bf | 724 | struct snd_seq_client *dest_client; |
9244b2c3 | 725 | struct snd_seq_client_port *port; |
1da177e4 LT |
726 | |
727 | dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST); | |
728 | if (dest_client == NULL) | |
729 | return 0; /* no matching destination */ | |
730 | ||
731 | read_lock(&dest_client->ports_lock); | |
9244b2c3 | 732 | list_for_each_entry(port, &dest_client->ports_list_head, list) { |
1da177e4 LT |
733 | event->dest.port = port->addr.port; |
734 | /* pass NULL as source client to avoid error bounce */ | |
735 | err = snd_seq_deliver_single_event(NULL, event, | |
736 | SNDRV_SEQ_FILTER_BROADCAST, | |
737 | atomic, hop); | |
27423257 AG |
738 | if (err < 0) { |
739 | /* save first error that occurs and continue */ | |
740 | if (!result) | |
741 | result = err; | |
742 | continue; | |
743 | } | |
1da177e4 LT |
744 | num_ev++; |
745 | } | |
746 | read_unlock(&dest_client->ports_lock); | |
747 | snd_seq_client_unlock(dest_client); | |
748 | event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */ | |
27423257 | 749 | return (result < 0) ? result : num_ev; |
1da177e4 LT |
750 | } |
751 | ||
752 | /* | |
753 | * send the event to all clients: | |
754 | * if destination port is also ADDRESS_BROADCAST, deliver to all ports. | |
755 | */ | |
c7e0b5bf TI |
756 | static int broadcast_event(struct snd_seq_client *client, |
757 | struct snd_seq_event *event, int atomic, int hop) | |
1da177e4 | 758 | { |
27423257 | 759 | int err, result = 0, num_ev = 0; |
1da177e4 | 760 | int dest; |
c7e0b5bf | 761 | struct snd_seq_addr addr; |
1da177e4 LT |
762 | |
763 | addr = event->dest; /* save */ | |
764 | ||
765 | for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) { | |
766 | /* don't send to itself */ | |
767 | if (dest == client->number) | |
768 | continue; | |
769 | event->dest.client = dest; | |
770 | event->dest.port = addr.port; | |
771 | if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST) | |
772 | err = port_broadcast_event(client, event, atomic, hop); | |
773 | else | |
774 | /* pass NULL as source client to avoid error bounce */ | |
775 | err = snd_seq_deliver_single_event(NULL, event, | |
776 | SNDRV_SEQ_FILTER_BROADCAST, | |
777 | atomic, hop); | |
27423257 AG |
778 | if (err < 0) { |
779 | /* save first error that occurs and continue */ | |
780 | if (!result) | |
781 | result = err; | |
782 | continue; | |
783 | } | |
1da177e4 LT |
784 | num_ev += err; |
785 | } | |
786 | event->dest = addr; /* restore */ | |
27423257 | 787 | return (result < 0) ? result : num_ev; |
1da177e4 LT |
788 | } |
789 | ||
790 | ||
791 | /* multicast - not supported yet */ | |
c7e0b5bf | 792 | static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event, |
1da177e4 LT |
793 | int atomic, int hop) |
794 | { | |
04cc79a0 | 795 | pr_debug("ALSA: seq: multicast not supported yet.\n"); |
1da177e4 LT |
796 | return 0; /* ignored */ |
797 | } | |
798 | #endif /* SUPPORT_BROADCAST */ | |
799 | ||
800 | ||
801 | /* deliver an event to the destination port(s). | |
802 | * if the event is to subscribers or broadcast, the event is dispatched | |
803 | * to multiple targets. | |
804 | * | |
805 | * RETURN VALUE: n > 0 : the number of delivered events. | |
806 | * n == 0 : the event was not passed to any client. | |
807 | * n < 0 : error - event was not processed. | |
808 | */ | |
c7e0b5bf | 809 | static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event, |
1da177e4 LT |
810 | int atomic, int hop) |
811 | { | |
812 | int result; | |
813 | ||
814 | hop++; | |
815 | if (hop >= SNDRV_SEQ_MAX_HOPS) { | |
04cc79a0 | 816 | pr_debug("ALSA: seq: too long delivery path (%d:%d->%d:%d)\n", |
1da177e4 LT |
817 | event->source.client, event->source.port, |
818 | event->dest.client, event->dest.port); | |
819 | return -EMLINK; | |
820 | } | |
821 | ||
19b592da TI |
822 | if (snd_seq_ev_is_variable(event) && |
823 | snd_BUG_ON(atomic && (event->data.ext.len & SNDRV_SEQ_EXT_USRPTR))) | |
824 | return -EINVAL; | |
825 | ||
1da177e4 LT |
826 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS || |
827 | event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) | |
828 | result = deliver_to_subscribers(client, event, atomic, hop); | |
829 | #ifdef SUPPORT_BROADCAST | |
830 | else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST || | |
831 | event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST) | |
832 | result = broadcast_event(client, event, atomic, hop); | |
833 | else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS) | |
834 | result = multicast_event(client, event, atomic, hop); | |
835 | else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST) | |
836 | result = port_broadcast_event(client, event, atomic, hop); | |
837 | #endif | |
838 | else | |
839 | result = snd_seq_deliver_single_event(client, event, 0, atomic, hop); | |
840 | ||
841 | return result; | |
842 | } | |
843 | ||
844 | /* | |
845 | * dispatch an event cell: | |
846 | * This function is called only from queue check routines in timer | |
847 | * interrupts or after enqueued. | |
848 | * The event cell shall be released or re-queued in this function. | |
849 | * | |
850 | * RETURN VALUE: n > 0 : the number of delivered events. | |
851 | * n == 0 : the event was not passed to any client. | |
852 | * n < 0 : error - event was not processed. | |
853 | */ | |
c7e0b5bf | 854 | int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop) |
1da177e4 | 855 | { |
c7e0b5bf | 856 | struct snd_seq_client *client; |
1da177e4 LT |
857 | int result; |
858 | ||
7eaa943c TI |
859 | if (snd_BUG_ON(!cell)) |
860 | return -EINVAL; | |
1da177e4 LT |
861 | |
862 | client = snd_seq_client_use_ptr(cell->event.source.client); | |
863 | if (client == NULL) { | |
864 | snd_seq_cell_free(cell); /* release this cell */ | |
865 | return -EINVAL; | |
866 | } | |
867 | ||
868 | if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) { | |
869 | /* NOTE event: | |
870 | * the event cell is re-used as a NOTE-OFF event and | |
871 | * enqueued again. | |
872 | */ | |
c7e0b5bf | 873 | struct snd_seq_event tmpev, *ev; |
1da177e4 LT |
874 | |
875 | /* reserve this event to enqueue note-off later */ | |
876 | tmpev = cell->event; | |
877 | tmpev.type = SNDRV_SEQ_EVENT_NOTEON; | |
878 | result = snd_seq_deliver_event(client, &tmpev, atomic, hop); | |
879 | ||
880 | /* | |
881 | * This was originally a note event. We now re-use the | |
882 | * cell for the note-off event. | |
883 | */ | |
884 | ||
885 | ev = &cell->event; | |
886 | ev->type = SNDRV_SEQ_EVENT_NOTEOFF; | |
887 | ev->flags |= SNDRV_SEQ_PRIORITY_HIGH; | |
888 | ||
889 | /* add the duration time */ | |
890 | switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) { | |
891 | case SNDRV_SEQ_TIME_STAMP_TICK: | |
892 | ev->time.tick += ev->data.note.duration; | |
893 | break; | |
894 | case SNDRV_SEQ_TIME_STAMP_REAL: | |
895 | /* unit for duration is ms */ | |
896 | ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000); | |
897 | ev->time.time.tv_sec += ev->data.note.duration / 1000 + | |
898 | ev->time.time.tv_nsec / 1000000000; | |
899 | ev->time.time.tv_nsec %= 1000000000; | |
900 | break; | |
901 | } | |
902 | ev->data.note.velocity = ev->data.note.off_velocity; | |
903 | ||
904 | /* Now queue this cell as the note off event */ | |
905 | if (snd_seq_enqueue_event(cell, atomic, hop) < 0) | |
906 | snd_seq_cell_free(cell); /* release this cell */ | |
907 | ||
908 | } else { | |
909 | /* Normal events: | |
910 | * event cell is freed after processing the event | |
911 | */ | |
912 | ||
913 | result = snd_seq_deliver_event(client, &cell->event, atomic, hop); | |
914 | snd_seq_cell_free(cell); | |
915 | } | |
916 | ||
917 | snd_seq_client_unlock(client); | |
918 | return result; | |
919 | } | |
920 | ||
921 | ||
922 | /* Allocate a cell from client pool and enqueue it to queue: | |
923 | * if pool is empty and blocking is TRUE, sleep until a new cell is | |
924 | * available. | |
925 | */ | |
c7e0b5bf TI |
926 | static int snd_seq_client_enqueue_event(struct snd_seq_client *client, |
927 | struct snd_seq_event *event, | |
1da177e4 | 928 | struct file *file, int blocking, |
7bd80091 TI |
929 | int atomic, int hop, |
930 | struct mutex *mutexp) | |
1da177e4 | 931 | { |
c7e0b5bf | 932 | struct snd_seq_event_cell *cell; |
1da177e4 LT |
933 | int err; |
934 | ||
935 | /* special queue values - force direct passing */ | |
936 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
937 | event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; | |
938 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
939 | } else | |
940 | #ifdef SUPPORT_BROADCAST | |
941 | if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) { | |
942 | event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST; | |
943 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
944 | } | |
945 | #endif | |
946 | if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { | |
947 | /* check presence of source port */ | |
c7e0b5bf | 948 | struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port); |
1da177e4 LT |
949 | if (src_port == NULL) |
950 | return -EINVAL; | |
951 | snd_seq_port_unlock(src_port); | |
952 | } | |
953 | ||
954 | /* direct event processing without enqueued */ | |
955 | if (snd_seq_ev_is_direct(event)) { | |
956 | if (event->type == SNDRV_SEQ_EVENT_NOTE) | |
957 | return -EINVAL; /* this event must be enqueued! */ | |
958 | return snd_seq_deliver_event(client, event, atomic, hop); | |
959 | } | |
960 | ||
961 | /* Not direct, normal queuing */ | |
962 | if (snd_seq_queue_is_used(event->queue, client->number) <= 0) | |
963 | return -EINVAL; /* invalid queue */ | |
964 | if (! snd_seq_write_pool_allocated(client)) | |
965 | return -ENXIO; /* queue is not allocated */ | |
966 | ||
967 | /* allocate an event cell */ | |
7bd80091 TI |
968 | err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, |
969 | file, mutexp); | |
1da177e4 LT |
970 | if (err < 0) |
971 | return err; | |
972 | ||
973 | /* we got a cell. enqueue it. */ | |
974 | if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) { | |
975 | snd_seq_cell_free(cell); | |
976 | return err; | |
977 | } | |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
982 | ||
983 | /* | |
984 | * check validity of event type and data length. | |
985 | * return non-zero if invalid. | |
986 | */ | |
c7e0b5bf | 987 | static int check_event_type_and_length(struct snd_seq_event *ev) |
1da177e4 LT |
988 | { |
989 | switch (snd_seq_ev_length_type(ev)) { | |
990 | case SNDRV_SEQ_EVENT_LENGTH_FIXED: | |
991 | if (snd_seq_ev_is_variable_type(ev)) | |
992 | return -EINVAL; | |
993 | break; | |
994 | case SNDRV_SEQ_EVENT_LENGTH_VARIABLE: | |
995 | if (! snd_seq_ev_is_variable_type(ev) || | |
996 | (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN) | |
997 | return -EINVAL; | |
998 | break; | |
999 | case SNDRV_SEQ_EVENT_LENGTH_VARUSR: | |
e5723b41 | 1000 | if (! snd_seq_ev_is_direct(ev)) |
1da177e4 LT |
1001 | return -EINVAL; |
1002 | break; | |
1003 | } | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | ||
1008 | /* handle write() */ | |
1009 | /* possible error values: | |
1010 | * -ENXIO invalid client or file open mode | |
1011 | * -ENOMEM malloc failed | |
1012 | * -EFAULT seg. fault during copy from user space | |
1013 | * -EINVAL invalid event | |
1014 | * -EAGAIN no space in output pool | |
1015 | * -EINTR interrupts while sleep | |
1016 | * -EMLINK too many hops | |
1017 | * others depends on return value from driver callback | |
1018 | */ | |
c7e0b5bf TI |
1019 | static ssize_t snd_seq_write(struct file *file, const char __user *buf, |
1020 | size_t count, loff_t *offset) | |
1da177e4 | 1021 | { |
c7e0b5bf | 1022 | struct snd_seq_client *client = file->private_data; |
1da177e4 | 1023 | int written = 0, len; |
d15d662e | 1024 | int err; |
c7e0b5bf | 1025 | struct snd_seq_event event; |
1da177e4 LT |
1026 | |
1027 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT)) | |
1028 | return -ENXIO; | |
1029 | ||
1030 | /* check client structures are in place */ | |
7eaa943c TI |
1031 | if (snd_BUG_ON(!client)) |
1032 | return -ENXIO; | |
1da177e4 LT |
1033 | |
1034 | if (!client->accept_output || client->pool == NULL) | |
1035 | return -ENXIO; | |
1036 | ||
1037 | /* allocate the pool now if the pool is not allocated yet */ | |
7bd80091 | 1038 | mutex_lock(&client->ioctl_mutex); |
1da177e4 | 1039 | if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) { |
d15d662e | 1040 | err = snd_seq_pool_init(client->pool); |
d15d662e | 1041 | if (err < 0) |
7bd80091 | 1042 | goto out; |
1da177e4 LT |
1043 | } |
1044 | ||
1045 | /* only process whole events */ | |
d15d662e | 1046 | err = -EINVAL; |
c7e0b5bf | 1047 | while (count >= sizeof(struct snd_seq_event)) { |
1da177e4 LT |
1048 | /* Read in the event header from the user */ |
1049 | len = sizeof(event); | |
1050 | if (copy_from_user(&event, buf, len)) { | |
1051 | err = -EFAULT; | |
1052 | break; | |
1053 | } | |
1054 | event.source.client = client->number; /* fill in client number */ | |
1055 | /* Check for extension data length */ | |
1056 | if (check_event_type_and_length(&event)) { | |
1057 | err = -EINVAL; | |
1058 | break; | |
1059 | } | |
1060 | ||
1061 | /* check for special events */ | |
1062 | if (event.type == SNDRV_SEQ_EVENT_NONE) | |
1063 | goto __skip_event; | |
1064 | else if (snd_seq_ev_is_reserved(&event)) { | |
1065 | err = -EINVAL; | |
1066 | break; | |
1067 | } | |
1068 | ||
1069 | if (snd_seq_ev_is_variable(&event)) { | |
1070 | int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK; | |
1071 | if ((size_t)(extlen + len) > count) { | |
1072 | /* back out, will get an error this time or next */ | |
1073 | err = -EINVAL; | |
1074 | break; | |
1075 | } | |
1076 | /* set user space pointer */ | |
1077 | event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR; | |
4d23359b | 1078 | event.data.ext.ptr = (char __force *)buf |
c7e0b5bf | 1079 | + sizeof(struct snd_seq_event); |
1da177e4 LT |
1080 | len += extlen; /* increment data length */ |
1081 | } else { | |
1082 | #ifdef CONFIG_COMPAT | |
1083 | if (client->convert32 && snd_seq_ev_is_varusr(&event)) { | |
fea952e5 | 1084 | void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]); |
1da177e4 LT |
1085 | event.data.ext.ptr = ptr; |
1086 | } | |
1087 | #endif | |
1088 | } | |
1089 | ||
1090 | /* ok, enqueue it */ | |
1091 | err = snd_seq_client_enqueue_event(client, &event, file, | |
1092 | !(file->f_flags & O_NONBLOCK), | |
7bd80091 | 1093 | 0, 0, &client->ioctl_mutex); |
1da177e4 LT |
1094 | if (err < 0) |
1095 | break; | |
1096 | ||
1097 | __skip_event: | |
1098 | /* Update pointers and counts */ | |
1099 | count -= len; | |
1100 | buf += len; | |
1101 | written += len; | |
1102 | } | |
1103 | ||
7bd80091 TI |
1104 | out: |
1105 | mutex_unlock(&client->ioctl_mutex); | |
1da177e4 LT |
1106 | return written ? written : err; |
1107 | } | |
1108 | ||
1109 | ||
1110 | /* | |
1111 | * handle polling | |
1112 | */ | |
680ef72a | 1113 | static __poll_t snd_seq_poll(struct file *file, poll_table * wait) |
1da177e4 | 1114 | { |
c7e0b5bf | 1115 | struct snd_seq_client *client = file->private_data; |
680ef72a | 1116 | __poll_t mask = 0; |
1da177e4 LT |
1117 | |
1118 | /* check client structures are in place */ | |
7eaa943c | 1119 | if (snd_BUG_ON(!client)) |
a49a71f6 | 1120 | return EPOLLERR; |
1da177e4 LT |
1121 | |
1122 | if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) && | |
1123 | client->data.user.fifo) { | |
1124 | ||
1125 | /* check if data is available in the outqueue */ | |
1126 | if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait)) | |
a9a08845 | 1127 | mask |= EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
1128 | } |
1129 | ||
1130 | if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) { | |
1131 | ||
1132 | /* check if data is available in the pool */ | |
1133 | if (!snd_seq_write_pool_allocated(client) || | |
1134 | snd_seq_pool_poll_wait(client->pool, file, wait)) | |
a9a08845 | 1135 | mask |= EPOLLOUT | EPOLLWRNORM; |
1da177e4 LT |
1136 | } |
1137 | ||
1138 | return mask; | |
1139 | } | |
1140 | ||
1141 | ||
1142 | /*-----------------------------------------------------*/ | |
1143 | ||
04a56dd8 TS |
1144 | static int snd_seq_ioctl_pversion(struct snd_seq_client *client, void *arg) |
1145 | { | |
1146 | int *pversion = arg; | |
1147 | ||
1148 | *pversion = SNDRV_SEQ_VERSION; | |
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | static int snd_seq_ioctl_client_id(struct snd_seq_client *client, void *arg) | |
1153 | { | |
1154 | int *client_id = arg; | |
1155 | ||
1156 | *client_id = client->number; | |
1157 | return 0; | |
1158 | } | |
1da177e4 LT |
1159 | |
1160 | /* SYSTEM_INFO ioctl() */ | |
04a56dd8 | 1161 | static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void *arg) |
1da177e4 | 1162 | { |
04a56dd8 | 1163 | struct snd_seq_system_info *info = arg; |
1da177e4 | 1164 | |
04a56dd8 | 1165 | memset(info, 0, sizeof(*info)); |
1da177e4 | 1166 | /* fill the info fields */ |
04a56dd8 TS |
1167 | info->queues = SNDRV_SEQ_MAX_QUEUES; |
1168 | info->clients = SNDRV_SEQ_MAX_CLIENTS; | |
1169 | info->ports = SNDRV_SEQ_MAX_PORTS; | |
1170 | info->channels = 256; /* fixed limit */ | |
1171 | info->cur_clients = client_usage.cur; | |
1172 | info->cur_queues = snd_seq_queue_get_cur_queues(); | |
1173 | ||
1da177e4 LT |
1174 | return 0; |
1175 | } | |
1176 | ||
1177 | ||
1178 | /* RUNNING_MODE ioctl() */ | |
04a56dd8 | 1179 | static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void *arg) |
1da177e4 | 1180 | { |
04a56dd8 | 1181 | struct snd_seq_running_info *info = arg; |
c7e0b5bf | 1182 | struct snd_seq_client *cptr; |
1da177e4 LT |
1183 | int err = 0; |
1184 | ||
1da177e4 | 1185 | /* requested client number */ |
04a56dd8 | 1186 | cptr = snd_seq_client_use_ptr(info->client); |
1da177e4 LT |
1187 | if (cptr == NULL) |
1188 | return -ENOENT; /* don't change !!! */ | |
1189 | ||
1190 | #ifdef SNDRV_BIG_ENDIAN | |
04a56dd8 | 1191 | if (!info->big_endian) { |
1da177e4 LT |
1192 | err = -EINVAL; |
1193 | goto __err; | |
1194 | } | |
1195 | #else | |
04a56dd8 | 1196 | if (info->big_endian) { |
1da177e4 LT |
1197 | err = -EINVAL; |
1198 | goto __err; | |
1199 | } | |
1200 | ||
1201 | #endif | |
04a56dd8 | 1202 | if (info->cpu_mode > sizeof(long)) { |
1da177e4 LT |
1203 | err = -EINVAL; |
1204 | goto __err; | |
1205 | } | |
04a56dd8 | 1206 | cptr->convert32 = (info->cpu_mode < sizeof(long)); |
1da177e4 LT |
1207 | __err: |
1208 | snd_seq_client_unlock(cptr); | |
1209 | return err; | |
1210 | } | |
1211 | ||
1212 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf TI |
1213 | static void get_client_info(struct snd_seq_client *cptr, |
1214 | struct snd_seq_client_info *info) | |
1da177e4 LT |
1215 | { |
1216 | info->client = cptr->number; | |
1217 | ||
1218 | /* fill the info fields */ | |
1219 | info->type = cptr->type; | |
1220 | strcpy(info->name, cptr->name); | |
1221 | info->filter = cptr->filter; | |
1222 | info->event_lost = cptr->event_lost; | |
1223 | memcpy(info->event_filter, cptr->event_filter, 32); | |
1224 | info->num_ports = cptr->num_ports; | |
a1ce94d0 MK |
1225 | |
1226 | if (cptr->type == USER_CLIENT) | |
1227 | info->pid = pid_vnr(cptr->data.user.owner); | |
1228 | else | |
1229 | info->pid = -1; | |
1230 | ||
1231 | if (cptr->type == KERNEL_CLIENT) | |
1232 | info->card = cptr->data.kernel.card ? cptr->data.kernel.card->number : -1; | |
1233 | else | |
1234 | info->card = -1; | |
1235 | ||
1da177e4 LT |
1236 | memset(info->reserved, 0, sizeof(info->reserved)); |
1237 | } | |
1238 | ||
c7e0b5bf | 1239 | static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client, |
04a56dd8 | 1240 | void *arg) |
1da177e4 | 1241 | { |
04a56dd8 | 1242 | struct snd_seq_client_info *client_info = arg; |
c7e0b5bf | 1243 | struct snd_seq_client *cptr; |
1da177e4 LT |
1244 | |
1245 | /* requested client number */ | |
04a56dd8 | 1246 | cptr = snd_seq_client_use_ptr(client_info->client); |
1da177e4 LT |
1247 | if (cptr == NULL) |
1248 | return -ENOENT; /* don't change !!! */ | |
1249 | ||
04a56dd8 | 1250 | get_client_info(cptr, client_info); |
1da177e4 LT |
1251 | snd_seq_client_unlock(cptr); |
1252 | ||
1da177e4 LT |
1253 | return 0; |
1254 | } | |
1255 | ||
1256 | ||
1257 | /* CLIENT_INFO ioctl() */ | |
c7e0b5bf | 1258 | static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, |
04a56dd8 | 1259 | void *arg) |
1da177e4 | 1260 | { |
04a56dd8 | 1261 | struct snd_seq_client_info *client_info = arg; |
1da177e4 LT |
1262 | |
1263 | /* it is not allowed to set the info fields for an another client */ | |
04a56dd8 | 1264 | if (client->number != client_info->client) |
1da177e4 LT |
1265 | return -EPERM; |
1266 | /* also client type must be set now */ | |
04a56dd8 | 1267 | if (client->type != client_info->type) |
1da177e4 LT |
1268 | return -EINVAL; |
1269 | ||
1270 | /* fill the info fields */ | |
04a56dd8 | 1271 | if (client_info->name[0]) |
212ac181 | 1272 | strscpy(client->name, client_info->name, sizeof(client->name)); |
1da177e4 | 1273 | |
04a56dd8 TS |
1274 | client->filter = client_info->filter; |
1275 | client->event_lost = client_info->event_lost; | |
1276 | memcpy(client->event_filter, client_info->event_filter, 32); | |
1da177e4 LT |
1277 | |
1278 | return 0; | |
1279 | } | |
1280 | ||
1281 | ||
1282 | /* | |
1283 | * CREATE PORT ioctl() | |
1284 | */ | |
04a56dd8 | 1285 | static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) |
1da177e4 | 1286 | { |
04a56dd8 | 1287 | struct snd_seq_port_info *info = arg; |
c7e0b5bf | 1288 | struct snd_seq_client_port *port; |
c7e0b5bf | 1289 | struct snd_seq_port_callback *callback; |
71105998 | 1290 | int port_idx; |
1da177e4 | 1291 | |
1da177e4 | 1292 | /* it is not allowed to create the port for an another client */ |
04a56dd8 | 1293 | if (info->addr.client != client->number) |
1da177e4 LT |
1294 | return -EPERM; |
1295 | ||
04a56dd8 | 1296 | port = snd_seq_create_port(client, (info->flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info->addr.port : -1); |
1da177e4 LT |
1297 | if (port == NULL) |
1298 | return -ENOMEM; | |
1299 | ||
04a56dd8 | 1300 | if (client->type == USER_CLIENT && info->kernel) { |
71105998 TI |
1301 | port_idx = port->addr.port; |
1302 | snd_seq_port_unlock(port); | |
1303 | snd_seq_delete_port(client, port_idx); | |
1da177e4 LT |
1304 | return -EINVAL; |
1305 | } | |
1306 | if (client->type == KERNEL_CLIENT) { | |
04a56dd8 | 1307 | if ((callback = info->kernel) != NULL) { |
1da177e4 LT |
1308 | if (callback->owner) |
1309 | port->owner = callback->owner; | |
1310 | port->private_data = callback->private_data; | |
1311 | port->private_free = callback->private_free; | |
1da177e4 LT |
1312 | port->event_input = callback->event_input; |
1313 | port->c_src.open = callback->subscribe; | |
1314 | port->c_src.close = callback->unsubscribe; | |
1315 | port->c_dest.open = callback->use; | |
1316 | port->c_dest.close = callback->unuse; | |
1317 | } | |
1318 | } | |
1319 | ||
04a56dd8 | 1320 | info->addr = port->addr; |
1da177e4 | 1321 | |
04a56dd8 | 1322 | snd_seq_set_port_info(port, info); |
1da177e4 | 1323 | snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); |
71105998 | 1324 | snd_seq_port_unlock(port); |
1da177e4 | 1325 | |
1da177e4 LT |
1326 | return 0; |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | * DELETE PORT ioctl() | |
1331 | */ | |
04a56dd8 | 1332 | static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, void *arg) |
1da177e4 | 1333 | { |
04a56dd8 | 1334 | struct snd_seq_port_info *info = arg; |
1da177e4 LT |
1335 | int err; |
1336 | ||
1da177e4 | 1337 | /* it is not allowed to remove the port for an another client */ |
04a56dd8 | 1338 | if (info->addr.client != client->number) |
1da177e4 LT |
1339 | return -EPERM; |
1340 | ||
04a56dd8 | 1341 | err = snd_seq_delete_port(client, info->addr.port); |
1da177e4 | 1342 | if (err >= 0) |
04a56dd8 | 1343 | snd_seq_system_client_ev_port_exit(client->number, info->addr.port); |
1da177e4 LT |
1344 | return err; |
1345 | } | |
1346 | ||
1347 | ||
1348 | /* | |
1349 | * GET_PORT_INFO ioctl() (on any client) | |
1350 | */ | |
04a56dd8 | 1351 | static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, void *arg) |
1da177e4 | 1352 | { |
04a56dd8 | 1353 | struct snd_seq_port_info *info = arg; |
c7e0b5bf TI |
1354 | struct snd_seq_client *cptr; |
1355 | struct snd_seq_client_port *port; | |
1da177e4 | 1356 | |
04a56dd8 | 1357 | cptr = snd_seq_client_use_ptr(info->addr.client); |
1da177e4 LT |
1358 | if (cptr == NULL) |
1359 | return -ENXIO; | |
1360 | ||
04a56dd8 | 1361 | port = snd_seq_port_use_ptr(cptr, info->addr.port); |
1da177e4 LT |
1362 | if (port == NULL) { |
1363 | snd_seq_client_unlock(cptr); | |
1364 | return -ENOENT; /* don't change */ | |
1365 | } | |
1366 | ||
1367 | /* get port info */ | |
04a56dd8 | 1368 | snd_seq_get_port_info(port, info); |
1da177e4 LT |
1369 | snd_seq_port_unlock(port); |
1370 | snd_seq_client_unlock(cptr); | |
1371 | ||
1da177e4 LT |
1372 | return 0; |
1373 | } | |
1374 | ||
1375 | ||
1376 | /* | |
1377 | * SET_PORT_INFO ioctl() (only ports on this/own client) | |
1378 | */ | |
04a56dd8 | 1379 | static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, void *arg) |
1da177e4 | 1380 | { |
04a56dd8 | 1381 | struct snd_seq_port_info *info = arg; |
c7e0b5bf | 1382 | struct snd_seq_client_port *port; |
1da177e4 | 1383 | |
04a56dd8 | 1384 | if (info->addr.client != client->number) /* only set our own ports ! */ |
1da177e4 | 1385 | return -EPERM; |
04a56dd8 | 1386 | port = snd_seq_port_use_ptr(client, info->addr.port); |
1da177e4 | 1387 | if (port) { |
04a56dd8 | 1388 | snd_seq_set_port_info(port, info); |
1da177e4 LT |
1389 | snd_seq_port_unlock(port); |
1390 | } | |
1391 | return 0; | |
1392 | } | |
1393 | ||
1394 | ||
1395 | /* | |
1396 | * port subscription (connection) | |
1397 | */ | |
1398 | #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ) | |
1399 | #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE) | |
1400 | ||
c7e0b5bf TI |
1401 | static int check_subscription_permission(struct snd_seq_client *client, |
1402 | struct snd_seq_client_port *sport, | |
1403 | struct snd_seq_client_port *dport, | |
1404 | struct snd_seq_port_subscribe *subs) | |
1da177e4 LT |
1405 | { |
1406 | if (client->number != subs->sender.client && | |
1407 | client->number != subs->dest.client) { | |
1408 | /* connection by third client - check export permission */ | |
1409 | if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1410 | return -EPERM; | |
1411 | if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) | |
1412 | return -EPERM; | |
1413 | } | |
1414 | ||
1415 | /* check read permission */ | |
1416 | /* if sender or receiver is the subscribing client itself, | |
1417 | * no permission check is necessary | |
1418 | */ | |
1419 | if (client->number != subs->sender.client) { | |
1420 | if (! check_port_perm(sport, PERM_RD)) | |
1421 | return -EPERM; | |
1422 | } | |
1423 | /* check write permission */ | |
1424 | if (client->number != subs->dest.client) { | |
1425 | if (! check_port_perm(dport, PERM_WR)) | |
1426 | return -EPERM; | |
1427 | } | |
1428 | return 0; | |
1429 | } | |
1430 | ||
1431 | /* | |
1432 | * send an subscription notify event to user client: | |
1433 | * client must be user client. | |
1434 | */ | |
1435 | int snd_seq_client_notify_subscription(int client, int port, | |
c7e0b5bf TI |
1436 | struct snd_seq_port_subscribe *info, |
1437 | int evtype) | |
1da177e4 | 1438 | { |
c7e0b5bf | 1439 | struct snd_seq_event event; |
1da177e4 LT |
1440 | |
1441 | memset(&event, 0, sizeof(event)); | |
1442 | event.type = evtype; | |
1443 | event.data.connect.dest = info->dest; | |
1444 | event.data.connect.sender = info->sender; | |
1445 | ||
1446 | return snd_seq_system_notify(client, port, &event); /* non-atomic */ | |
1447 | } | |
1448 | ||
1449 | ||
1450 | /* | |
1451 | * add to port's subscription list IOCTL interface | |
1452 | */ | |
c7e0b5bf | 1453 | static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client, |
04a56dd8 | 1454 | void *arg) |
1da177e4 | 1455 | { |
04a56dd8 | 1456 | struct snd_seq_port_subscribe *subs = arg; |
1da177e4 | 1457 | int result = -EINVAL; |
c7e0b5bf TI |
1458 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1459 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1da177e4 | 1460 | |
04a56dd8 | 1461 | if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) |
1da177e4 | 1462 | goto __end; |
04a56dd8 | 1463 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
1da177e4 | 1464 | goto __end; |
04a56dd8 | 1465 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
1da177e4 | 1466 | goto __end; |
04a56dd8 | 1467 | if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) |
1da177e4 LT |
1468 | goto __end; |
1469 | ||
04a56dd8 | 1470 | result = check_subscription_permission(client, sport, dport, subs); |
1da177e4 LT |
1471 | if (result < 0) |
1472 | goto __end; | |
1473 | ||
1474 | /* connect them */ | |
04a56dd8 | 1475 | result = snd_seq_port_connect(client, sender, sport, receiver, dport, subs); |
1da177e4 LT |
1476 | if (! result) /* broadcast announce */ |
1477 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
04a56dd8 | 1478 | subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED); |
1da177e4 LT |
1479 | __end: |
1480 | if (sport) | |
1481 | snd_seq_port_unlock(sport); | |
1482 | if (dport) | |
1483 | snd_seq_port_unlock(dport); | |
1484 | if (sender) | |
1485 | snd_seq_client_unlock(sender); | |
1486 | if (receiver) | |
1487 | snd_seq_client_unlock(receiver); | |
1488 | return result; | |
1489 | } | |
1490 | ||
1491 | ||
1492 | /* | |
1493 | * remove from port's subscription list | |
1494 | */ | |
c7e0b5bf | 1495 | static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client, |
04a56dd8 | 1496 | void *arg) |
1da177e4 | 1497 | { |
04a56dd8 | 1498 | struct snd_seq_port_subscribe *subs = arg; |
1da177e4 | 1499 | int result = -ENXIO; |
c7e0b5bf TI |
1500 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
1501 | struct snd_seq_client_port *sport = NULL, *dport = NULL; | |
1da177e4 | 1502 | |
04a56dd8 | 1503 | if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) |
1da177e4 | 1504 | goto __end; |
04a56dd8 | 1505 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
1da177e4 | 1506 | goto __end; |
04a56dd8 | 1507 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
1da177e4 | 1508 | goto __end; |
04a56dd8 | 1509 | if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) |
1da177e4 LT |
1510 | goto __end; |
1511 | ||
04a56dd8 | 1512 | result = check_subscription_permission(client, sport, dport, subs); |
1da177e4 LT |
1513 | if (result < 0) |
1514 | goto __end; | |
1515 | ||
04a56dd8 | 1516 | result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, subs); |
1da177e4 LT |
1517 | if (! result) /* broadcast announce */ |
1518 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, | |
04a56dd8 | 1519 | subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED); |
1da177e4 LT |
1520 | __end: |
1521 | if (sport) | |
1522 | snd_seq_port_unlock(sport); | |
1523 | if (dport) | |
1524 | snd_seq_port_unlock(dport); | |
1525 | if (sender) | |
1526 | snd_seq_client_unlock(sender); | |
1527 | if (receiver) | |
1528 | snd_seq_client_unlock(receiver); | |
1529 | return result; | |
1530 | } | |
1531 | ||
1532 | ||
1533 | /* CREATE_QUEUE ioctl() */ | |
04a56dd8 | 1534 | static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, void *arg) |
1da177e4 | 1535 | { |
04a56dd8 | 1536 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1537 | struct snd_seq_queue *q; |
1da177e4 | 1538 | |
7e1d90f6 DM |
1539 | q = snd_seq_queue_alloc(client->number, info->locked, info->flags); |
1540 | if (IS_ERR(q)) | |
1541 | return PTR_ERR(q); | |
1da177e4 | 1542 | |
04a56dd8 TS |
1543 | info->queue = q->queue; |
1544 | info->locked = q->locked; | |
1545 | info->owner = q->owner; | |
1da177e4 LT |
1546 | |
1547 | /* set queue name */ | |
04a56dd8 TS |
1548 | if (!info->name[0]) |
1549 | snprintf(info->name, sizeof(info->name), "Queue-%d", q->queue); | |
212ac181 | 1550 | strscpy(q->name, info->name, sizeof(q->name)); |
7e1d90f6 | 1551 | snd_use_lock_free(&q->use_lock); |
1da177e4 | 1552 | |
1da177e4 LT |
1553 | return 0; |
1554 | } | |
1555 | ||
1556 | /* DELETE_QUEUE ioctl() */ | |
04a56dd8 | 1557 | static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, void *arg) |
1da177e4 | 1558 | { |
04a56dd8 | 1559 | struct snd_seq_queue_info *info = arg; |
1da177e4 | 1560 | |
04a56dd8 | 1561 | return snd_seq_queue_delete(client->number, info->queue); |
1da177e4 LT |
1562 | } |
1563 | ||
1564 | /* GET_QUEUE_INFO ioctl() */ | |
c7e0b5bf | 1565 | static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client, |
04a56dd8 | 1566 | void *arg) |
1da177e4 | 1567 | { |
04a56dd8 | 1568 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1569 | struct snd_seq_queue *q; |
1da177e4 | 1570 | |
04a56dd8 | 1571 | q = queueptr(info->queue); |
1da177e4 LT |
1572 | if (q == NULL) |
1573 | return -EINVAL; | |
1574 | ||
04a56dd8 TS |
1575 | memset(info, 0, sizeof(*info)); |
1576 | info->queue = q->queue; | |
1577 | info->owner = q->owner; | |
1578 | info->locked = q->locked; | |
1579 | strlcpy(info->name, q->name, sizeof(info->name)); | |
1da177e4 LT |
1580 | queuefree(q); |
1581 | ||
1da177e4 LT |
1582 | return 0; |
1583 | } | |
1584 | ||
1585 | /* SET_QUEUE_INFO ioctl() */ | |
c7e0b5bf | 1586 | static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client, |
04a56dd8 | 1587 | void *arg) |
1da177e4 | 1588 | { |
04a56dd8 | 1589 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1590 | struct snd_seq_queue *q; |
1da177e4 | 1591 | |
04a56dd8 | 1592 | if (info->owner != client->number) |
1da177e4 LT |
1593 | return -EINVAL; |
1594 | ||
1595 | /* change owner/locked permission */ | |
04a56dd8 TS |
1596 | if (snd_seq_queue_check_access(info->queue, client->number)) { |
1597 | if (snd_seq_queue_set_owner(info->queue, client->number, info->locked) < 0) | |
1da177e4 | 1598 | return -EPERM; |
04a56dd8 TS |
1599 | if (info->locked) |
1600 | snd_seq_queue_use(info->queue, client->number, 1); | |
1da177e4 LT |
1601 | } else { |
1602 | return -EPERM; | |
1603 | } | |
1604 | ||
04a56dd8 | 1605 | q = queueptr(info->queue); |
1da177e4 LT |
1606 | if (! q) |
1607 | return -EINVAL; | |
1608 | if (q->owner != client->number) { | |
1609 | queuefree(q); | |
1610 | return -EPERM; | |
1611 | } | |
212ac181 | 1612 | strscpy(q->name, info->name, sizeof(q->name)); |
1da177e4 LT |
1613 | queuefree(q); |
1614 | ||
1615 | return 0; | |
1616 | } | |
1617 | ||
1618 | /* GET_NAMED_QUEUE ioctl() */ | |
04a56dd8 TS |
1619 | static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, |
1620 | void *arg) | |
1da177e4 | 1621 | { |
04a56dd8 | 1622 | struct snd_seq_queue_info *info = arg; |
c7e0b5bf | 1623 | struct snd_seq_queue *q; |
1da177e4 | 1624 | |
04a56dd8 | 1625 | q = snd_seq_queue_find_name(info->name); |
1da177e4 LT |
1626 | if (q == NULL) |
1627 | return -EINVAL; | |
04a56dd8 TS |
1628 | info->queue = q->queue; |
1629 | info->owner = q->owner; | |
1630 | info->locked = q->locked; | |
1da177e4 LT |
1631 | queuefree(q); |
1632 | ||
1da177e4 LT |
1633 | return 0; |
1634 | } | |
1635 | ||
1636 | /* GET_QUEUE_STATUS ioctl() */ | |
c7e0b5bf | 1637 | static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client, |
04a56dd8 | 1638 | void *arg) |
1da177e4 | 1639 | { |
04a56dd8 | 1640 | struct snd_seq_queue_status *status = arg; |
c7e0b5bf TI |
1641 | struct snd_seq_queue *queue; |
1642 | struct snd_seq_timer *tmr; | |
1da177e4 | 1643 | |
04a56dd8 | 1644 | queue = queueptr(status->queue); |
1da177e4 LT |
1645 | if (queue == NULL) |
1646 | return -EINVAL; | |
04a56dd8 TS |
1647 | memset(status, 0, sizeof(*status)); |
1648 | status->queue = queue->queue; | |
1da177e4 LT |
1649 | |
1650 | tmr = queue->timer; | |
04a56dd8 | 1651 | status->events = queue->tickq->cells + queue->timeq->cells; |
1da177e4 | 1652 | |
04a56dd8 TS |
1653 | status->time = snd_seq_timer_get_cur_time(tmr); |
1654 | status->tick = snd_seq_timer_get_cur_tick(tmr); | |
1da177e4 | 1655 | |
04a56dd8 | 1656 | status->running = tmr->running; |
1da177e4 | 1657 | |
04a56dd8 | 1658 | status->flags = queue->flags; |
1da177e4 LT |
1659 | queuefree(queue); |
1660 | ||
1da177e4 LT |
1661 | return 0; |
1662 | } | |
1663 | ||
1664 | ||
1665 | /* GET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf | 1666 | static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, |
04a56dd8 | 1667 | void *arg) |
1da177e4 | 1668 | { |
04a56dd8 | 1669 | struct snd_seq_queue_tempo *tempo = arg; |
c7e0b5bf TI |
1670 | struct snd_seq_queue *queue; |
1671 | struct snd_seq_timer *tmr; | |
1da177e4 | 1672 | |
04a56dd8 | 1673 | queue = queueptr(tempo->queue); |
1da177e4 LT |
1674 | if (queue == NULL) |
1675 | return -EINVAL; | |
04a56dd8 TS |
1676 | memset(tempo, 0, sizeof(*tempo)); |
1677 | tempo->queue = queue->queue; | |
1da177e4 LT |
1678 | |
1679 | tmr = queue->timer; | |
1680 | ||
04a56dd8 TS |
1681 | tempo->tempo = tmr->tempo; |
1682 | tempo->ppq = tmr->ppq; | |
1683 | tempo->skew_value = tmr->skew; | |
1684 | tempo->skew_base = tmr->skew_base; | |
1da177e4 LT |
1685 | queuefree(queue); |
1686 | ||
1da177e4 LT |
1687 | return 0; |
1688 | } | |
1689 | ||
1690 | ||
1691 | /* SET_QUEUE_TEMPO ioctl() */ | |
c7e0b5bf | 1692 | int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo) |
1da177e4 LT |
1693 | { |
1694 | if (!snd_seq_queue_check_access(tempo->queue, client)) | |
1695 | return -EPERM; | |
1696 | return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo); | |
1697 | } | |
91715ed9 TI |
1698 | EXPORT_SYMBOL(snd_seq_set_queue_tempo); |
1699 | ||
c7e0b5bf | 1700 | static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, |
04a56dd8 | 1701 | void *arg) |
1da177e4 | 1702 | { |
04a56dd8 | 1703 | struct snd_seq_queue_tempo *tempo = arg; |
1da177e4 | 1704 | int result; |
1da177e4 | 1705 | |
04a56dd8 | 1706 | result = snd_seq_set_queue_tempo(client->number, tempo); |
1da177e4 LT |
1707 | return result < 0 ? result : 0; |
1708 | } | |
1709 | ||
1710 | ||
1711 | /* GET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf | 1712 | static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client, |
04a56dd8 | 1713 | void *arg) |
1da177e4 | 1714 | { |
04a56dd8 | 1715 | struct snd_seq_queue_timer *timer = arg; |
c7e0b5bf TI |
1716 | struct snd_seq_queue *queue; |
1717 | struct snd_seq_timer *tmr; | |
1da177e4 | 1718 | |
04a56dd8 | 1719 | queue = queueptr(timer->queue); |
1da177e4 LT |
1720 | if (queue == NULL) |
1721 | return -EINVAL; | |
1722 | ||
04702e8d | 1723 | mutex_lock(&queue->timer_mutex); |
1da177e4 | 1724 | tmr = queue->timer; |
04a56dd8 TS |
1725 | memset(timer, 0, sizeof(*timer)); |
1726 | timer->queue = queue->queue; | |
1da177e4 | 1727 | |
04a56dd8 | 1728 | timer->type = tmr->type; |
1da177e4 | 1729 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
04a56dd8 TS |
1730 | timer->u.alsa.id = tmr->alsa_id; |
1731 | timer->u.alsa.resolution = tmr->preferred_resolution; | |
1da177e4 | 1732 | } |
1a60d4c5 | 1733 | mutex_unlock(&queue->timer_mutex); |
1da177e4 LT |
1734 | queuefree(queue); |
1735 | ||
1da177e4 LT |
1736 | return 0; |
1737 | } | |
1738 | ||
1739 | ||
1740 | /* SET_QUEUE_TIMER ioctl() */ | |
c7e0b5bf | 1741 | static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client, |
04a56dd8 | 1742 | void *arg) |
1da177e4 | 1743 | { |
04a56dd8 | 1744 | struct snd_seq_queue_timer *timer = arg; |
1da177e4 | 1745 | int result = 0; |
1da177e4 | 1746 | |
04a56dd8 | 1747 | if (timer->type != SNDRV_SEQ_TIMER_ALSA) |
1da177e4 LT |
1748 | return -EINVAL; |
1749 | ||
04a56dd8 | 1750 | if (snd_seq_queue_check_access(timer->queue, client->number)) { |
c7e0b5bf TI |
1751 | struct snd_seq_queue *q; |
1752 | struct snd_seq_timer *tmr; | |
1da177e4 | 1753 | |
04a56dd8 | 1754 | q = queueptr(timer->queue); |
1da177e4 LT |
1755 | if (q == NULL) |
1756 | return -ENXIO; | |
04702e8d | 1757 | mutex_lock(&q->timer_mutex); |
1da177e4 | 1758 | tmr = q->timer; |
04a56dd8 TS |
1759 | snd_seq_queue_timer_close(timer->queue); |
1760 | tmr->type = timer->type; | |
1da177e4 | 1761 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
04a56dd8 TS |
1762 | tmr->alsa_id = timer->u.alsa.id; |
1763 | tmr->preferred_resolution = timer->u.alsa.resolution; | |
1da177e4 | 1764 | } |
04a56dd8 | 1765 | result = snd_seq_queue_timer_open(timer->queue); |
1a60d4c5 | 1766 | mutex_unlock(&q->timer_mutex); |
1da177e4 LT |
1767 | queuefree(q); |
1768 | } else { | |
1769 | return -EPERM; | |
1770 | } | |
1771 | ||
1772 | return result; | |
1773 | } | |
1774 | ||
1775 | ||
1776 | /* GET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf | 1777 | static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client, |
04a56dd8 | 1778 | void *arg) |
1da177e4 | 1779 | { |
04a56dd8 | 1780 | struct snd_seq_queue_client *info = arg; |
1da177e4 LT |
1781 | int used; |
1782 | ||
04a56dd8 | 1783 | used = snd_seq_queue_is_used(info->queue, client->number); |
1da177e4 LT |
1784 | if (used < 0) |
1785 | return -EINVAL; | |
04a56dd8 TS |
1786 | info->used = used; |
1787 | info->client = client->number; | |
1da177e4 | 1788 | |
1da177e4 LT |
1789 | return 0; |
1790 | } | |
1791 | ||
1792 | ||
1793 | /* SET_QUEUE_CLIENT ioctl() */ | |
c7e0b5bf | 1794 | static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client, |
04a56dd8 | 1795 | void *arg) |
1da177e4 | 1796 | { |
04a56dd8 | 1797 | struct snd_seq_queue_client *info = arg; |
1da177e4 | 1798 | int err; |
1da177e4 | 1799 | |
04a56dd8 TS |
1800 | if (info->used >= 0) { |
1801 | err = snd_seq_queue_use(info->queue, client->number, info->used); | |
1da177e4 LT |
1802 | if (err < 0) |
1803 | return err; | |
1804 | } | |
1805 | ||
1806 | return snd_seq_ioctl_get_queue_client(client, arg); | |
1807 | } | |
1808 | ||
1809 | ||
1810 | /* GET_CLIENT_POOL ioctl() */ | |
c7e0b5bf | 1811 | static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, |
04a56dd8 | 1812 | void *arg) |
1da177e4 | 1813 | { |
04a56dd8 | 1814 | struct snd_seq_client_pool *info = arg; |
c7e0b5bf | 1815 | struct snd_seq_client *cptr; |
1da177e4 | 1816 | |
04a56dd8 | 1817 | cptr = snd_seq_client_use_ptr(info->client); |
1da177e4 LT |
1818 | if (cptr == NULL) |
1819 | return -ENOENT; | |
04a56dd8 TS |
1820 | memset(info, 0, sizeof(*info)); |
1821 | info->client = cptr->number; | |
1822 | info->output_pool = cptr->pool->size; | |
1823 | info->output_room = cptr->pool->room; | |
1824 | info->output_free = info->output_pool; | |
1825 | info->output_free = snd_seq_unused_cells(cptr->pool); | |
1da177e4 | 1826 | if (cptr->type == USER_CLIENT) { |
04a56dd8 TS |
1827 | info->input_pool = cptr->data.user.fifo_pool_size; |
1828 | info->input_free = info->input_pool; | |
1da177e4 | 1829 | if (cptr->data.user.fifo) |
04a56dd8 | 1830 | info->input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); |
1da177e4 | 1831 | } else { |
04a56dd8 TS |
1832 | info->input_pool = 0; |
1833 | info->input_free = 0; | |
1da177e4 LT |
1834 | } |
1835 | snd_seq_client_unlock(cptr); | |
1836 | ||
1da177e4 LT |
1837 | return 0; |
1838 | } | |
1839 | ||
1840 | /* SET_CLIENT_POOL ioctl() */ | |
c7e0b5bf | 1841 | static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, |
04a56dd8 | 1842 | void *arg) |
1da177e4 | 1843 | { |
04a56dd8 | 1844 | struct snd_seq_client_pool *info = arg; |
1da177e4 LT |
1845 | int rc; |
1846 | ||
04a56dd8 | 1847 | if (client->number != info->client) |
1da177e4 LT |
1848 | return -EINVAL; /* can't change other clients */ |
1849 | ||
04a56dd8 | 1850 | if (info->output_pool >= 1 && info->output_pool <= SNDRV_SEQ_MAX_EVENTS && |
1da177e4 | 1851 | (! snd_seq_write_pool_allocated(client) || |
04a56dd8 | 1852 | info->output_pool != client->pool->size)) { |
1da177e4 | 1853 | if (snd_seq_write_pool_allocated(client)) { |
d8573936 TI |
1854 | /* is the pool in use? */ |
1855 | if (atomic_read(&client->pool->counter)) | |
1856 | return -EBUSY; | |
1da177e4 | 1857 | /* remove all existing cells */ |
c520ff3d | 1858 | snd_seq_pool_mark_closing(client->pool); |
1da177e4 LT |
1859 | snd_seq_pool_done(client->pool); |
1860 | } | |
04a56dd8 | 1861 | client->pool->size = info->output_pool; |
1da177e4 LT |
1862 | rc = snd_seq_pool_init(client->pool); |
1863 | if (rc < 0) | |
1864 | return rc; | |
1865 | } | |
1866 | if (client->type == USER_CLIENT && client->data.user.fifo != NULL && | |
04a56dd8 TS |
1867 | info->input_pool >= 1 && |
1868 | info->input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && | |
1869 | info->input_pool != client->data.user.fifo_pool_size) { | |
1da177e4 | 1870 | /* change pool size */ |
04a56dd8 | 1871 | rc = snd_seq_fifo_resize(client->data.user.fifo, info->input_pool); |
1da177e4 LT |
1872 | if (rc < 0) |
1873 | return rc; | |
04a56dd8 | 1874 | client->data.user.fifo_pool_size = info->input_pool; |
1da177e4 | 1875 | } |
04a56dd8 TS |
1876 | if (info->output_room >= 1 && |
1877 | info->output_room <= client->pool->size) { | |
1878 | client->pool->room = info->output_room; | |
1da177e4 LT |
1879 | } |
1880 | ||
1881 | return snd_seq_ioctl_get_client_pool(client, arg); | |
1882 | } | |
1883 | ||
1884 | ||
1885 | /* REMOVE_EVENTS ioctl() */ | |
c7e0b5bf | 1886 | static int snd_seq_ioctl_remove_events(struct snd_seq_client *client, |
04a56dd8 | 1887 | void *arg) |
1da177e4 | 1888 | { |
04a56dd8 | 1889 | struct snd_seq_remove_events *info = arg; |
1da177e4 LT |
1890 | |
1891 | /* | |
1892 | * Input mostly not implemented XXX. | |
1893 | */ | |
04a56dd8 | 1894 | if (info->remove_mode & SNDRV_SEQ_REMOVE_INPUT) { |
1da177e4 LT |
1895 | /* |
1896 | * No restrictions so for a user client we can clear | |
1897 | * the whole fifo | |
1898 | */ | |
030e2c78 | 1899 | if (client->type == USER_CLIENT && client->data.user.fifo) |
1da177e4 LT |
1900 | snd_seq_fifo_clear(client->data.user.fifo); |
1901 | } | |
1902 | ||
04a56dd8 TS |
1903 | if (info->remove_mode & SNDRV_SEQ_REMOVE_OUTPUT) |
1904 | snd_seq_queue_remove_cells(client->number, info); | |
1da177e4 LT |
1905 | |
1906 | return 0; | |
1907 | } | |
1908 | ||
1909 | ||
1910 | /* | |
1911 | * get subscription info | |
1912 | */ | |
c7e0b5bf | 1913 | static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client, |
04a56dd8 | 1914 | void *arg) |
1da177e4 | 1915 | { |
04a56dd8 | 1916 | struct snd_seq_port_subscribe *subs = arg; |
1da177e4 | 1917 | int result; |
c7e0b5bf TI |
1918 | struct snd_seq_client *sender = NULL; |
1919 | struct snd_seq_client_port *sport = NULL; | |
1da177e4 | 1920 | |
1da177e4 | 1921 | result = -EINVAL; |
04a56dd8 | 1922 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
1da177e4 | 1923 | goto __end; |
04a56dd8 | 1924 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
1da177e4 | 1925 | goto __end; |
2eabc5ec TI |
1926 | result = snd_seq_port_get_subscription(&sport->c_src, &subs->dest, |
1927 | subs); | |
1da177e4 LT |
1928 | __end: |
1929 | if (sport) | |
1930 | snd_seq_port_unlock(sport); | |
1931 | if (sender) | |
1932 | snd_seq_client_unlock(sender); | |
04a56dd8 | 1933 | |
1da177e4 LT |
1934 | return result; |
1935 | } | |
1936 | ||
1937 | ||
1938 | /* | |
1939 | * get subscription info - check only its presence | |
1940 | */ | |
04a56dd8 | 1941 | static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, void *arg) |
1da177e4 | 1942 | { |
04a56dd8 | 1943 | struct snd_seq_query_subs *subs = arg; |
1da177e4 | 1944 | int result = -ENXIO; |
c7e0b5bf TI |
1945 | struct snd_seq_client *cptr = NULL; |
1946 | struct snd_seq_client_port *port = NULL; | |
c7e0b5bf | 1947 | struct snd_seq_port_subs_info *group; |
1da177e4 LT |
1948 | struct list_head *p; |
1949 | int i; | |
1950 | ||
04a56dd8 | 1951 | if ((cptr = snd_seq_client_use_ptr(subs->root.client)) == NULL) |
1da177e4 | 1952 | goto __end; |
04a56dd8 | 1953 | if ((port = snd_seq_port_use_ptr(cptr, subs->root.port)) == NULL) |
1da177e4 LT |
1954 | goto __end; |
1955 | ||
04a56dd8 | 1956 | switch (subs->type) { |
1da177e4 LT |
1957 | case SNDRV_SEQ_QUERY_SUBS_READ: |
1958 | group = &port->c_src; | |
1959 | break; | |
1960 | case SNDRV_SEQ_QUERY_SUBS_WRITE: | |
1961 | group = &port->c_dest; | |
1962 | break; | |
1963 | default: | |
1964 | goto __end; | |
1965 | } | |
1966 | ||
1967 | down_read(&group->list_mutex); | |
1968 | /* search for the subscriber */ | |
04a56dd8 | 1969 | subs->num_subs = group->count; |
1da177e4 LT |
1970 | i = 0; |
1971 | result = -ENOENT; | |
1972 | list_for_each(p, &group->list_head) { | |
04a56dd8 | 1973 | if (i++ == subs->index) { |
1da177e4 | 1974 | /* found! */ |
c7e0b5bf | 1975 | struct snd_seq_subscribers *s; |
04a56dd8 | 1976 | if (subs->type == SNDRV_SEQ_QUERY_SUBS_READ) { |
c7e0b5bf | 1977 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
04a56dd8 | 1978 | subs->addr = s->info.dest; |
1da177e4 | 1979 | } else { |
c7e0b5bf | 1980 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
04a56dd8 | 1981 | subs->addr = s->info.sender; |
1da177e4 | 1982 | } |
04a56dd8 TS |
1983 | subs->flags = s->info.flags; |
1984 | subs->queue = s->info.queue; | |
1da177e4 LT |
1985 | result = 0; |
1986 | break; | |
1987 | } | |
1988 | } | |
1989 | up_read(&group->list_mutex); | |
1990 | ||
1991 | __end: | |
1992 | if (port) | |
1993 | snd_seq_port_unlock(port); | |
1994 | if (cptr) | |
1995 | snd_seq_client_unlock(cptr); | |
04a56dd8 | 1996 | |
1da177e4 LT |
1997 | return result; |
1998 | } | |
1999 | ||
2000 | ||
2001 | /* | |
2002 | * query next client | |
2003 | */ | |
c7e0b5bf | 2004 | static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client, |
04a56dd8 | 2005 | void *arg) |
1da177e4 | 2006 | { |
04a56dd8 | 2007 | struct snd_seq_client_info *info = arg; |
c7e0b5bf | 2008 | struct snd_seq_client *cptr = NULL; |
1da177e4 LT |
2009 | |
2010 | /* search for next client */ | |
c9a4c638 TI |
2011 | if (info->client < INT_MAX) |
2012 | info->client++; | |
04a56dd8 TS |
2013 | if (info->client < 0) |
2014 | info->client = 0; | |
2015 | for (; info->client < SNDRV_SEQ_MAX_CLIENTS; info->client++) { | |
2016 | cptr = snd_seq_client_use_ptr(info->client); | |
1da177e4 LT |
2017 | if (cptr) |
2018 | break; /* found */ | |
2019 | } | |
2020 | if (cptr == NULL) | |
2021 | return -ENOENT; | |
2022 | ||
04a56dd8 | 2023 | get_client_info(cptr, info); |
1da177e4 LT |
2024 | snd_seq_client_unlock(cptr); |
2025 | ||
1da177e4 LT |
2026 | return 0; |
2027 | } | |
2028 | ||
2029 | /* | |
2030 | * query next port | |
2031 | */ | |
c7e0b5bf | 2032 | static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client, |
04a56dd8 | 2033 | void *arg) |
1da177e4 | 2034 | { |
04a56dd8 | 2035 | struct snd_seq_port_info *info = arg; |
c7e0b5bf TI |
2036 | struct snd_seq_client *cptr; |
2037 | struct snd_seq_client_port *port = NULL; | |
1da177e4 | 2038 | |
04a56dd8 | 2039 | cptr = snd_seq_client_use_ptr(info->addr.client); |
1da177e4 LT |
2040 | if (cptr == NULL) |
2041 | return -ENXIO; | |
2042 | ||
2043 | /* search for next port */ | |
04a56dd8 TS |
2044 | info->addr.port++; |
2045 | port = snd_seq_port_query_nearest(cptr, info); | |
1da177e4 LT |
2046 | if (port == NULL) { |
2047 | snd_seq_client_unlock(cptr); | |
2048 | return -ENOENT; | |
2049 | } | |
2050 | ||
2051 | /* get port info */ | |
04a56dd8 TS |
2052 | info->addr = port->addr; |
2053 | snd_seq_get_port_info(port, info); | |
1da177e4 LT |
2054 | snd_seq_port_unlock(port); |
2055 | snd_seq_client_unlock(cptr); | |
2056 | ||
1da177e4 LT |
2057 | return 0; |
2058 | } | |
2059 | ||
2060 | /* -------------------------------------------------------- */ | |
2061 | ||
8ce8eb60 TS |
2062 | static const struct ioctl_handler { |
2063 | unsigned int cmd; | |
2064 | int (*func)(struct snd_seq_client *client, void *arg); | |
2065 | } ioctl_handlers[] = { | |
04a56dd8 TS |
2066 | { SNDRV_SEQ_IOCTL_PVERSION, snd_seq_ioctl_pversion }, |
2067 | { SNDRV_SEQ_IOCTL_CLIENT_ID, snd_seq_ioctl_client_id }, | |
1da177e4 LT |
2068 | { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info }, |
2069 | { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode }, | |
2070 | { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info }, | |
2071 | { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info }, | |
2072 | { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port }, | |
2073 | { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port }, | |
2074 | { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info }, | |
2075 | { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info }, | |
2076 | { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port }, | |
2077 | { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port }, | |
2078 | { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue }, | |
2079 | { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue }, | |
2080 | { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info }, | |
2081 | { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info }, | |
2082 | { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue }, | |
2083 | { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status }, | |
2084 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo }, | |
2085 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo }, | |
2086 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer }, | |
2087 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer }, | |
2088 | { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client }, | |
2089 | { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client }, | |
2090 | { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool }, | |
2091 | { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool }, | |
2092 | { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription }, | |
2093 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client }, | |
2094 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port }, | |
2095 | { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events }, | |
2096 | { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs }, | |
2097 | { 0, NULL }, | |
2098 | }; | |
2099 | ||
e12ec251 TS |
2100 | static long snd_seq_ioctl(struct file *file, unsigned int cmd, |
2101 | unsigned long arg) | |
8ce8eb60 TS |
2102 | { |
2103 | struct snd_seq_client *client = file->private_data; | |
2104 | /* To use kernel stack for ioctl data. */ | |
4127e80a | 2105 | union { |
8ce8eb60 TS |
2106 | int pversion; |
2107 | int client_id; | |
2108 | struct snd_seq_system_info system_info; | |
2109 | struct snd_seq_running_info running_info; | |
2110 | struct snd_seq_client_info client_info; | |
2111 | struct snd_seq_port_info port_info; | |
2112 | struct snd_seq_port_subscribe port_subscribe; | |
2113 | struct snd_seq_queue_info queue_info; | |
2114 | struct snd_seq_queue_status queue_status; | |
2115 | struct snd_seq_queue_tempo tempo; | |
2116 | struct snd_seq_queue_timer queue_timer; | |
2117 | struct snd_seq_queue_client queue_client; | |
2118 | struct snd_seq_client_pool client_pool; | |
2119 | struct snd_seq_remove_events remove_events; | |
2120 | struct snd_seq_query_subs query_subs; | |
4127e80a | 2121 | } buf; |
8ce8eb60 TS |
2122 | const struct ioctl_handler *handler; |
2123 | unsigned long size; | |
2124 | int err; | |
2125 | ||
2126 | if (snd_BUG_ON(!client)) | |
2127 | return -ENXIO; | |
2128 | ||
2129 | for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { | |
2130 | if (handler->cmd == cmd) | |
2131 | break; | |
2132 | } | |
2133 | if (handler->cmd == 0) | |
2134 | return -ENOTTY; | |
4127e80a TS |
2135 | |
2136 | memset(&buf, 0, sizeof(buf)); | |
2137 | ||
8ce8eb60 TS |
2138 | /* |
2139 | * All of ioctl commands for ALSA sequencer get an argument of size | |
2140 | * within 13 bits. We can safely pick up the size from the command. | |
2141 | */ | |
2142 | size = _IOC_SIZE(handler->cmd); | |
69b05825 | 2143 | if (handler->cmd & IOC_IN) { |
8ce8eb60 TS |
2144 | if (copy_from_user(&buf, (const void __user *)arg, size)) |
2145 | return -EFAULT; | |
2146 | } | |
2147 | ||
b3defb79 | 2148 | mutex_lock(&client->ioctl_mutex); |
8ce8eb60 | 2149 | err = handler->func(client, &buf); |
b3defb79 | 2150 | mutex_unlock(&client->ioctl_mutex); |
8ce8eb60 TS |
2151 | if (err >= 0) { |
2152 | /* Some commands includes a bug in 'dir' field. */ | |
2153 | if (handler->cmd == SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT || | |
2154 | handler->cmd == SNDRV_SEQ_IOCTL_SET_CLIENT_POOL || | |
69b05825 | 2155 | (handler->cmd & IOC_OUT)) |
8ce8eb60 TS |
2156 | if (copy_to_user((void __user *)arg, &buf, size)) |
2157 | return -EFAULT; | |
2158 | } | |
2159 | ||
2160 | return err; | |
2161 | } | |
2162 | ||
1da177e4 LT |
2163 | #ifdef CONFIG_COMPAT |
2164 | #include "seq_compat.c" | |
2165 | #else | |
2166 | #define snd_seq_ioctl_compat NULL | |
2167 | #endif | |
2168 | ||
2169 | /* -------------------------------------------------------- */ | |
2170 | ||
2171 | ||
2172 | /* exported to kernel modules */ | |
7b6d9245 CL |
2173 | int snd_seq_create_kernel_client(struct snd_card *card, int client_index, |
2174 | const char *name_fmt, ...) | |
1da177e4 | 2175 | { |
c7e0b5bf | 2176 | struct snd_seq_client *client; |
7b6d9245 | 2177 | va_list args; |
1da177e4 | 2178 | |
7eaa943c TI |
2179 | if (snd_BUG_ON(in_interrupt())) |
2180 | return -EBUSY; | |
1da177e4 | 2181 | |
aa1e77e6 | 2182 | if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD) |
1da177e4 | 2183 | return -EINVAL; |
aa1e77e6 | 2184 | if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS) |
1da177e4 | 2185 | return -EINVAL; |
1da177e4 | 2186 | |
04702e8d | 2187 | mutex_lock(®ister_mutex); |
d001544d CL |
2188 | |
2189 | if (card) { | |
aa1e77e6 CL |
2190 | client_index += SNDRV_SEQ_GLOBAL_CLIENTS |
2191 | + card->number * SNDRV_SEQ_CLIENTS_PER_CARD; | |
2192 | if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) | |
d001544d CL |
2193 | client_index = -1; |
2194 | } | |
2195 | ||
1da177e4 | 2196 | /* empty write queue as default */ |
aa1e77e6 | 2197 | client = seq_create_client1(client_index, 0); |
1da177e4 | 2198 | if (client == NULL) { |
1a60d4c5 | 2199 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2200 | return -EBUSY; /* failure code */ |
2201 | } | |
2202 | usage_alloc(&client_usage, 1); | |
2203 | ||
83e8ad69 CL |
2204 | client->accept_input = 1; |
2205 | client->accept_output = 1; | |
a1ce94d0 | 2206 | client->data.kernel.card = card; |
1da177e4 | 2207 | |
7b6d9245 CL |
2208 | va_start(args, name_fmt); |
2209 | vsnprintf(client->name, sizeof(client->name), name_fmt, args); | |
2210 | va_end(args); | |
1da177e4 LT |
2211 | |
2212 | client->type = KERNEL_CLIENT; | |
1a60d4c5 | 2213 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
2214 | |
2215 | /* make others aware this new client */ | |
2216 | snd_seq_system_client_ev_client_start(client->number); | |
2217 | ||
2218 | /* return client number to caller */ | |
2219 | return client->number; | |
2220 | } | |
91715ed9 TI |
2221 | EXPORT_SYMBOL(snd_seq_create_kernel_client); |
2222 | ||
1da177e4 LT |
2223 | /* exported to kernel modules */ |
2224 | int snd_seq_delete_kernel_client(int client) | |
2225 | { | |
c7e0b5bf | 2226 | struct snd_seq_client *ptr; |
1da177e4 | 2227 | |
7eaa943c TI |
2228 | if (snd_BUG_ON(in_interrupt())) |
2229 | return -EBUSY; | |
1da177e4 LT |
2230 | |
2231 | ptr = clientptr(client); | |
2232 | if (ptr == NULL) | |
2233 | return -EINVAL; | |
2234 | ||
2235 | seq_free_client(ptr); | |
2236 | kfree(ptr); | |
2237 | return 0; | |
2238 | } | |
91715ed9 | 2239 | EXPORT_SYMBOL(snd_seq_delete_kernel_client); |
1da177e4 | 2240 | |
6740ea67 TI |
2241 | /* |
2242 | * exported, called by kernel clients to enqueue events (w/o blocking) | |
2243 | * | |
2244 | * RETURN VALUE: zero if succeed, negative if error | |
1da177e4 | 2245 | */ |
6740ea67 TI |
2246 | int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, |
2247 | struct file *file, bool blocking) | |
1da177e4 | 2248 | { |
c7e0b5bf | 2249 | struct snd_seq_client *cptr; |
1da177e4 LT |
2250 | int result; |
2251 | ||
7eaa943c TI |
2252 | if (snd_BUG_ON(!ev)) |
2253 | return -EINVAL; | |
1da177e4 LT |
2254 | |
2255 | if (ev->type == SNDRV_SEQ_EVENT_NONE) | |
2256 | return 0; /* ignore this */ | |
2257 | if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR) | |
2258 | return -EINVAL; /* quoted events can't be enqueued */ | |
2259 | ||
2260 | /* fill in client number */ | |
2261 | ev->source.client = client; | |
2262 | ||
2263 | if (check_event_type_and_length(ev)) | |
2264 | return -EINVAL; | |
2265 | ||
2266 | cptr = snd_seq_client_use_ptr(client); | |
2267 | if (cptr == NULL) | |
2268 | return -EINVAL; | |
2269 | ||
6b580f52 | 2270 | if (!cptr->accept_output) { |
1da177e4 | 2271 | result = -EPERM; |
6b580f52 TI |
2272 | } else { /* send it */ |
2273 | mutex_lock(&cptr->ioctl_mutex); | |
7bd80091 | 2274 | result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, |
6b580f52 TI |
2275 | false, 0, |
2276 | &cptr->ioctl_mutex); | |
2277 | mutex_unlock(&cptr->ioctl_mutex); | |
2278 | } | |
1da177e4 LT |
2279 | |
2280 | snd_seq_client_unlock(cptr); | |
2281 | return result; | |
2282 | } | |
91715ed9 TI |
2283 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue); |
2284 | ||
1da177e4 LT |
2285 | /* |
2286 | * exported, called by kernel clients to dispatch events directly to other | |
2287 | * clients, bypassing the queues. Event time-stamp will be updated. | |
2288 | * | |
2289 | * RETURN VALUE: negative = delivery failed, | |
2290 | * zero, or positive: the number of delivered events | |
2291 | */ | |
c7e0b5bf | 2292 | int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev, |
1da177e4 LT |
2293 | int atomic, int hop) |
2294 | { | |
c7e0b5bf | 2295 | struct snd_seq_client *cptr; |
1da177e4 LT |
2296 | int result; |
2297 | ||
7eaa943c TI |
2298 | if (snd_BUG_ON(!ev)) |
2299 | return -EINVAL; | |
1da177e4 LT |
2300 | |
2301 | /* fill in client number */ | |
2302 | ev->queue = SNDRV_SEQ_QUEUE_DIRECT; | |
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 | |
2315 | result = snd_seq_deliver_event(cptr, ev, atomic, hop); | |
2316 | ||
2317 | snd_seq_client_unlock(cptr); | |
2318 | return result; | |
2319 | } | |
91715ed9 | 2320 | EXPORT_SYMBOL(snd_seq_kernel_client_dispatch); |
1da177e4 | 2321 | |
77dfa8d3 TS |
2322 | /** |
2323 | * snd_seq_kernel_client_ctl - operate a command for a client with data in | |
2324 | * kernel space. | |
2325 | * @clientid: A numerical ID for a client. | |
2326 | * @cmd: An ioctl(2) command for ALSA sequencer operation. | |
2327 | * @arg: A pointer to data in kernel space. | |
2328 | * | |
2329 | * Against its name, both kernel/application client can be handled by this | |
2330 | * kernel API. A pointer of 'arg' argument should be in kernel space. | |
2331 | * | |
2332 | * Return: 0 at success. Negative error code at failure. | |
1da177e4 LT |
2333 | */ |
2334 | int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) | |
2335 | { | |
8ce8eb60 | 2336 | const struct ioctl_handler *handler; |
c7e0b5bf | 2337 | struct snd_seq_client *client; |
1da177e4 LT |
2338 | |
2339 | client = clientptr(clientid); | |
2340 | if (client == NULL) | |
2341 | return -ENXIO; | |
8ce8eb60 TS |
2342 | |
2343 | for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { | |
2344 | if (handler->cmd == cmd) | |
2345 | return handler->func(client, arg); | |
2346 | } | |
2347 | ||
e12ec251 TS |
2348 | pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n", |
2349 | cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); | |
2350 | return -ENOTTY; | |
1da177e4 | 2351 | } |
91715ed9 | 2352 | EXPORT_SYMBOL(snd_seq_kernel_client_ctl); |
1da177e4 LT |
2353 | |
2354 | /* exported (for OSS emulator) */ | |
2355 | int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait) | |
2356 | { | |
c7e0b5bf | 2357 | struct snd_seq_client *client; |
1da177e4 LT |
2358 | |
2359 | client = clientptr(clientid); | |
2360 | if (client == NULL) | |
2361 | return -ENXIO; | |
2362 | ||
2363 | if (! snd_seq_write_pool_allocated(client)) | |
2364 | return 1; | |
2365 | if (snd_seq_pool_poll_wait(client->pool, file, wait)) | |
2366 | return 1; | |
2367 | return 0; | |
2368 | } | |
91715ed9 TI |
2369 | EXPORT_SYMBOL(snd_seq_kernel_client_write_poll); |
2370 | ||
1da177e4 LT |
2371 | /*---------------------------------------------------------------------------*/ |
2372 | ||
cd6a6503 | 2373 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
2374 | /* |
2375 | * /proc interface | |
2376 | */ | |
c7e0b5bf TI |
2377 | static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, |
2378 | struct snd_seq_port_subs_info *group, | |
2379 | int is_src, char *msg) | |
1da177e4 LT |
2380 | { |
2381 | struct list_head *p; | |
c7e0b5bf | 2382 | struct snd_seq_subscribers *s; |
1da177e4 LT |
2383 | int count = 0; |
2384 | ||
2385 | down_read(&group->list_mutex); | |
2386 | if (list_empty(&group->list_head)) { | |
2387 | up_read(&group->list_mutex); | |
2388 | return; | |
2389 | } | |
2390 | snd_iprintf(buffer, msg); | |
2391 | list_for_each(p, &group->list_head) { | |
2392 | if (is_src) | |
c7e0b5bf | 2393 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
1da177e4 | 2394 | else |
c7e0b5bf | 2395 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
1da177e4 LT |
2396 | if (count++) |
2397 | snd_iprintf(buffer, ", "); | |
2398 | snd_iprintf(buffer, "%d:%d", | |
2399 | is_src ? s->info.dest.client : s->info.sender.client, | |
2400 | is_src ? s->info.dest.port : s->info.sender.port); | |
2401 | if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) | |
2402 | snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue); | |
2403 | if (group->exclusive) | |
2404 | snd_iprintf(buffer, "[ex]"); | |
2405 | } | |
2406 | up_read(&group->list_mutex); | |
2407 | snd_iprintf(buffer, "\n"); | |
2408 | } | |
2409 | ||
2410 | #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-') | |
2411 | #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-') | |
2412 | #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e') | |
2413 | ||
2414 | #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-') | |
2415 | ||
c7e0b5bf TI |
2416 | static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, |
2417 | struct snd_seq_client *client) | |
1da177e4 | 2418 | { |
9244b2c3 | 2419 | struct snd_seq_client_port *p; |
1da177e4 | 2420 | |
1a60d4c5 | 2421 | mutex_lock(&client->ports_mutex); |
9244b2c3 | 2422 | list_for_each_entry(p, &client->ports_list_head, list) { |
1da177e4 LT |
2423 | snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", |
2424 | p->addr.port, p->name, | |
2425 | FLAG_PERM_RD(p->capability), | |
2426 | FLAG_PERM_WR(p->capability), | |
2427 | FLAG_PERM_EX(p->capability), | |
2428 | FLAG_PERM_DUPLEX(p->capability)); | |
2429 | snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); | |
2430 | snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); | |
2431 | } | |
1a60d4c5 | 2432 | mutex_unlock(&client->ports_mutex); |
1da177e4 LT |
2433 | } |
2434 | ||
2435 | ||
2436 | /* exported to seq_info.c */ | |
c7e0b5bf TI |
2437 | void snd_seq_info_clients_read(struct snd_info_entry *entry, |
2438 | struct snd_info_buffer *buffer) | |
1da177e4 | 2439 | { |
1da177e4 | 2440 | int c; |
c7e0b5bf | 2441 | struct snd_seq_client *client; |
1da177e4 LT |
2442 | |
2443 | snd_iprintf(buffer, "Client info\n"); | |
2444 | snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur); | |
2445 | snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak); | |
2446 | snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS); | |
2447 | snd_iprintf(buffer, "\n"); | |
2448 | ||
2449 | /* list the client table */ | |
2450 | for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) { | |
2451 | client = snd_seq_client_use_ptr(c); | |
2452 | if (client == NULL) | |
2453 | continue; | |
2454 | if (client->type == NO_CLIENT) { | |
2455 | snd_seq_client_unlock(client); | |
2456 | continue; | |
2457 | } | |
2458 | ||
2459 | snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n", | |
2460 | c, client->name, | |
2461 | client->type == USER_CLIENT ? "User" : "Kernel"); | |
2462 | snd_seq_info_dump_ports(buffer, client); | |
2463 | if (snd_seq_write_pool_allocated(client)) { | |
2464 | snd_iprintf(buffer, " Output pool :\n"); | |
2465 | snd_seq_info_pool(buffer, client->pool, " "); | |
2466 | } | |
2467 | if (client->type == USER_CLIENT && client->data.user.fifo && | |
2468 | client->data.user.fifo->pool) { | |
2469 | snd_iprintf(buffer, " Input pool :\n"); | |
2470 | snd_seq_info_pool(buffer, client->data.user.fifo->pool, " "); | |
2471 | } | |
2472 | snd_seq_client_unlock(client); | |
2473 | } | |
2474 | } | |
cd6a6503 | 2475 | #endif /* CONFIG_SND_PROC_FS */ |
1da177e4 LT |
2476 | |
2477 | /*---------------------------------------------------------------------------*/ | |
2478 | ||
2479 | ||
2480 | /* | |
2481 | * REGISTRATION PART | |
2482 | */ | |
2483 | ||
9c2e08c5 | 2484 | static const struct file_operations snd_seq_f_ops = |
1da177e4 LT |
2485 | { |
2486 | .owner = THIS_MODULE, | |
2487 | .read = snd_seq_read, | |
2488 | .write = snd_seq_write, | |
2489 | .open = snd_seq_open, | |
2490 | .release = snd_seq_release, | |
02f4865f | 2491 | .llseek = no_llseek, |
1da177e4 LT |
2492 | .poll = snd_seq_poll, |
2493 | .unlocked_ioctl = snd_seq_ioctl, | |
2494 | .compat_ioctl = snd_seq_ioctl_compat, | |
2495 | }; | |
2496 | ||
5205388d TI |
2497 | static struct device seq_dev; |
2498 | ||
1da177e4 LT |
2499 | /* |
2500 | * register sequencer device | |
2501 | */ | |
2502 | int __init snd_sequencer_device_init(void) | |
2503 | { | |
2504 | int err; | |
2505 | ||
5205388d TI |
2506 | snd_device_initialize(&seq_dev, NULL); |
2507 | dev_set_name(&seq_dev, "seq"); | |
2508 | ||
04702e8d | 2509 | mutex_lock(®ister_mutex); |
40a4b263 TI |
2510 | err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, |
2511 | &snd_seq_f_ops, NULL, &seq_dev); | |
04702e8d | 2512 | mutex_unlock(®ister_mutex); |
5205388d | 2513 | if (err < 0) { |
5205388d | 2514 | put_device(&seq_dev); |
1da177e4 LT |
2515 | return err; |
2516 | } | |
2517 | ||
1da177e4 LT |
2518 | return 0; |
2519 | } | |
2520 | ||
2521 | ||
2522 | ||
2523 | /* | |
2524 | * unregister sequencer device | |
2525 | */ | |
00976ad5 | 2526 | void snd_sequencer_device_done(void) |
1da177e4 | 2527 | { |
40a4b263 | 2528 | snd_unregister_device(&seq_dev); |
5205388d | 2529 | put_device(&seq_dev); |
1da177e4 | 2530 | } |