Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ALSA sequencer Client Manager |
| 3 | * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl> |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 4 | * Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Takashi Iwai <tiwai@suse.de> |
| 6 | * |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/init.h> |
Paul Gortmaker | d81a6d7 | 2011-09-22 09:34:58 -0400 | [diff] [blame] | 25 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/slab.h> |
| 27 | #include <sound/core.h> |
| 28 | #include <sound/minors.h> |
| 29 | #include <linux/kmod.h> |
| 30 | |
| 31 | #include <sound/seq_kernel.h> |
| 32 | #include "seq_clientmgr.h" |
| 33 | #include "seq_memory.h" |
| 34 | #include "seq_queue.h" |
| 35 | #include "seq_timer.h" |
| 36 | #include "seq_info.h" |
| 37 | #include "seq_system.h" |
| 38 | #include <sound/seq_device.h> |
| 39 | #ifdef CONFIG_COMPAT |
| 40 | #include <linux/compat.h> |
| 41 | #endif |
| 42 | |
| 43 | /* Client Manager |
| 44 | |
| 45 | * this module handles the connections of userland and kernel clients |
| 46 | * |
| 47 | */ |
| 48 | |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 49 | /* |
| 50 | * There are four ranges of client numbers (last two shared): |
| 51 | * 0..15: global clients |
| 52 | * 16..127: statically allocated client numbers for cards 0..27 |
| 53 | * 128..191: dynamically allocated client numbers for cards 28..31 |
| 54 | * 128..191: dynamically allocated client numbers for applications |
| 55 | */ |
| 56 | |
| 57 | /* number of kernel non-card clients */ |
| 58 | #define SNDRV_SEQ_GLOBAL_CLIENTS 16 |
| 59 | /* clients per cards, for static clients */ |
| 60 | #define SNDRV_SEQ_CLIENTS_PER_CARD 4 |
| 61 | /* dynamically allocated client numbers (both kernel drivers and user space) */ |
| 62 | #define SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN 128 |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #define SNDRV_SEQ_LFLG_INPUT 0x0001 |
| 65 | #define SNDRV_SEQ_LFLG_OUTPUT 0x0002 |
| 66 | #define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT) |
| 67 | |
| 68 | static DEFINE_SPINLOCK(clients_lock); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 69 | static DEFINE_MUTEX(register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | /* |
| 72 | * client table |
| 73 | */ |
| 74 | static char clienttablock[SNDRV_SEQ_MAX_CLIENTS]; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 75 | static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS]; |
| 76 | static struct snd_seq_usage client_usage; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | /* |
| 79 | * prototypes |
| 80 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 81 | static int bounce_error_event(struct snd_seq_client *client, |
| 82 | struct snd_seq_event *event, |
| 83 | int err, int atomic, int hop); |
| 84 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
| 85 | struct snd_seq_event *event, |
| 86 | int filter, int atomic, int hop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* |
| 89 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | static inline unsigned short snd_seq_file_flags(struct file *file) |
| 91 | { |
| 92 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { |
| 93 | case FMODE_WRITE: |
| 94 | return SNDRV_SEQ_LFLG_OUTPUT; |
| 95 | case FMODE_READ: |
| 96 | return SNDRV_SEQ_LFLG_INPUT; |
| 97 | default: |
| 98 | return SNDRV_SEQ_LFLG_OPEN; |
| 99 | } |
| 100 | } |
| 101 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 102 | static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | { |
| 104 | return snd_seq_total_cells(client->pool) > 0; |
| 105 | } |
| 106 | |
| 107 | /* return pointer to client structure for specified id */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 108 | static struct snd_seq_client *clientptr(int clientid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
| 110 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { |
Takashi Iwai | 04cc79a | 2014-02-04 18:24:34 +0100 | [diff] [blame] | 111 | pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n", |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 112 | clientid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | return NULL; |
| 114 | } |
| 115 | return clienttab[clientid]; |
| 116 | } |
| 117 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 118 | struct snd_seq_client *snd_seq_client_use_ptr(int clientid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | { |
| 120 | unsigned long flags; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 121 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
| 123 | if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { |
Takashi Iwai | 04cc79a | 2014-02-04 18:24:34 +0100 | [diff] [blame] | 124 | pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n", |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 125 | clientid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | return NULL; |
| 127 | } |
| 128 | spin_lock_irqsave(&clients_lock, flags); |
| 129 | client = clientptr(clientid); |
| 130 | if (client) |
| 131 | goto __lock; |
| 132 | if (clienttablock[clientid]) { |
| 133 | spin_unlock_irqrestore(&clients_lock, flags); |
| 134 | return NULL; |
| 135 | } |
| 136 | spin_unlock_irqrestore(&clients_lock, flags); |
Johannes Berg | ee2da99 | 2008-07-09 10:28:41 +0200 | [diff] [blame] | 137 | #ifdef CONFIG_MODULES |
Jan Blunck | 0d63e4f | 2008-02-14 19:34:28 -0800 | [diff] [blame] | 138 | if (!in_interrupt()) { |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 139 | static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | static char card_requested[SNDRV_CARDS]; |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 141 | if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | int idx; |
| 143 | |
Jan Blunck | 0d63e4f | 2008-02-14 19:34:28 -0800 | [diff] [blame] | 144 | if (!client_requested[clientid]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | client_requested[clientid] = 1; |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 146 | for (idx = 0; idx < 15; idx++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | if (seq_client_load[idx] < 0) |
| 148 | break; |
| 149 | if (seq_client_load[idx] == clientid) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 150 | request_module("snd-seq-client-%i", |
| 151 | clientid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | break; |
| 153 | } |
| 154 | } |
| 155 | } |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 156 | } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) { |
| 157 | int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) / |
| 158 | SNDRV_SEQ_CLIENTS_PER_CARD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | if (card < snd_ecards_limit) { |
| 160 | if (! card_requested[card]) { |
| 161 | card_requested[card] = 1; |
| 162 | snd_request_card(card); |
| 163 | } |
| 164 | snd_seq_device_load_drivers(); |
| 165 | } |
| 166 | } |
| 167 | spin_lock_irqsave(&clients_lock, flags); |
| 168 | client = clientptr(clientid); |
| 169 | if (client) |
| 170 | goto __lock; |
| 171 | spin_unlock_irqrestore(&clients_lock, flags); |
| 172 | } |
| 173 | #endif |
| 174 | return NULL; |
| 175 | |
| 176 | __lock: |
| 177 | snd_use_lock_use(&client->use_lock); |
| 178 | spin_unlock_irqrestore(&clients_lock, flags); |
| 179 | return client; |
| 180 | } |
| 181 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 182 | static void usage_alloc(struct snd_seq_usage *res, int num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | { |
| 184 | res->cur += num; |
| 185 | if (res->cur > res->peak) |
| 186 | res->peak = res->cur; |
| 187 | } |
| 188 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 189 | static void usage_free(struct snd_seq_usage *res, int num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
| 191 | res->cur -= num; |
| 192 | } |
| 193 | |
| 194 | /* initialise data structures */ |
| 195 | int __init client_init_data(void) |
| 196 | { |
| 197 | /* zap out the client table */ |
| 198 | memset(&clienttablock, 0, sizeof(clienttablock)); |
| 199 | memset(&clienttab, 0, sizeof(clienttab)); |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 204 | static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | { |
| 206 | unsigned long flags; |
| 207 | int c; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 208 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
| 210 | /* init client data */ |
Takashi Iwai | ecca82b | 2005-09-09 14:20:49 +0200 | [diff] [blame] | 211 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | if (client == NULL) |
| 213 | return NULL; |
| 214 | client->pool = snd_seq_pool_new(poolsize); |
| 215 | if (client->pool == NULL) { |
| 216 | kfree(client); |
| 217 | return NULL; |
| 218 | } |
| 219 | client->type = NO_CLIENT; |
| 220 | snd_use_lock_init(&client->use_lock); |
| 221 | rwlock_init(&client->ports_lock); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 222 | mutex_init(&client->ports_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | INIT_LIST_HEAD(&client->ports_list_head); |
Takashi Iwai | e4ff9f2 | 2018-01-09 23:11:03 +0100 | [diff] [blame] | 224 | mutex_init(&client->ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | /* find free slot in the client table */ |
| 227 | spin_lock_irqsave(&clients_lock, flags); |
| 228 | if (client_index < 0) { |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 229 | for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN; |
| 230 | c < SNDRV_SEQ_MAX_CLIENTS; |
| 231 | c++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | if (clienttab[c] || clienttablock[c]) |
| 233 | continue; |
| 234 | clienttab[client->number = c] = client; |
| 235 | spin_unlock_irqrestore(&clients_lock, flags); |
| 236 | return client; |
| 237 | } |
| 238 | } else { |
| 239 | if (clienttab[client_index] == NULL && !clienttablock[client_index]) { |
| 240 | clienttab[client->number = client_index] = client; |
| 241 | spin_unlock_irqrestore(&clients_lock, flags); |
| 242 | return client; |
| 243 | } |
| 244 | } |
| 245 | spin_unlock_irqrestore(&clients_lock, flags); |
| 246 | snd_seq_pool_delete(&client->pool); |
| 247 | kfree(client); |
| 248 | return NULL; /* no free slot found or busy, return failure code */ |
| 249 | } |
| 250 | |
| 251 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 252 | static int seq_free_client1(struct snd_seq_client *client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | { |
| 254 | unsigned long flags; |
| 255 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 256 | if (!client) |
| 257 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | spin_lock_irqsave(&clients_lock, flags); |
| 259 | clienttablock[client->number] = 1; |
| 260 | clienttab[client->number] = NULL; |
| 261 | spin_unlock_irqrestore(&clients_lock, flags); |
Takashi Iwai | c706def | 2018-03-09 22:23:31 +0100 | [diff] [blame] | 262 | snd_seq_delete_all_ports(client); |
| 263 | snd_seq_queue_client_leave(client->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | snd_use_lock_sync(&client->use_lock); |
| 265 | snd_seq_queue_client_termination(client->number); |
| 266 | if (client->pool) |
| 267 | snd_seq_pool_delete(&client->pool); |
| 268 | spin_lock_irqsave(&clients_lock, flags); |
| 269 | clienttablock[client->number] = 0; |
| 270 | spin_unlock_irqrestore(&clients_lock, flags); |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 275 | static void seq_free_client(struct snd_seq_client * client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 277 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | switch (client->type) { |
| 279 | case NO_CLIENT: |
Takashi Iwai | 04cc79a | 2014-02-04 18:24:34 +0100 | [diff] [blame] | 280 | pr_warn("ALSA: seq: Trying to free unused client %d\n", |
| 281 | client->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | break; |
| 283 | case USER_CLIENT: |
| 284 | case KERNEL_CLIENT: |
| 285 | seq_free_client1(client); |
| 286 | usage_free(&client_usage, 1); |
| 287 | break; |
| 288 | |
| 289 | default: |
Takashi Iwai | 04cc79a | 2014-02-04 18:24:34 +0100 | [diff] [blame] | 290 | pr_err("ALSA: seq: Trying to free client %d with undefined type = %d\n", |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 291 | client->number, client->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 293 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
| 295 | snd_seq_system_client_ev_client_exit(client->number); |
| 296 | } |
| 297 | |
| 298 | |
| 299 | |
| 300 | /* -------------------------------------------------------- */ |
| 301 | |
| 302 | /* create a user client */ |
| 303 | static int snd_seq_open(struct inode *inode, struct file *file) |
| 304 | { |
| 305 | int c, mode; /* client id */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 306 | struct snd_seq_client *client; |
| 307 | struct snd_seq_user_client *user; |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 308 | int err; |
| 309 | |
| 310 | err = nonseekable_open(inode, file); |
| 311 | if (err < 0) |
| 312 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 314 | if (mutex_lock_interruptible(®ister_mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | return -ERESTARTSYS; |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 316 | client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | if (client == NULL) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 318 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | return -ENOMEM; /* failure code */ |
| 320 | } |
| 321 | |
| 322 | mode = snd_seq_file_flags(file); |
| 323 | if (mode & SNDRV_SEQ_LFLG_INPUT) |
| 324 | client->accept_input = 1; |
| 325 | if (mode & SNDRV_SEQ_LFLG_OUTPUT) |
| 326 | client->accept_output = 1; |
| 327 | |
| 328 | user = &client->data.user; |
| 329 | user->fifo = NULL; |
| 330 | user->fifo_pool_size = 0; |
| 331 | |
| 332 | if (mode & SNDRV_SEQ_LFLG_INPUT) { |
| 333 | user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS; |
| 334 | user->fifo = snd_seq_fifo_new(user->fifo_pool_size); |
| 335 | if (user->fifo == NULL) { |
| 336 | seq_free_client1(client); |
| 337 | kfree(client); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 338 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | return -ENOMEM; |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | usage_alloc(&client_usage, 1); |
| 344 | client->type = USER_CLIENT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 345 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
| 347 | c = client->number; |
| 348 | file->private_data = client; |
| 349 | |
| 350 | /* fill client data */ |
| 351 | user->file = file; |
| 352 | sprintf(client->name, "Client-%d", c); |
Martin Koegler | a1ce94d | 2016-03-02 19:26:28 +0100 | [diff] [blame] | 353 | client->data.user.owner = get_pid(task_pid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
| 355 | /* make others aware this new client */ |
| 356 | snd_seq_system_client_ev_client_start(c); |
| 357 | |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | /* delete a user client */ |
| 362 | static int snd_seq_release(struct inode *inode, struct file *file) |
| 363 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 364 | struct snd_seq_client *client = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
| 366 | if (client) { |
| 367 | seq_free_client(client); |
| 368 | if (client->data.user.fifo) |
| 369 | snd_seq_fifo_delete(&client->data.user.fifo); |
Martin Koegler | a1ce94d | 2016-03-02 19:26:28 +0100 | [diff] [blame] | 370 | put_pid(client->data.user.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | kfree(client); |
| 372 | } |
| 373 | |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | |
| 378 | /* handle client read() */ |
| 379 | /* possible error values: |
| 380 | * -ENXIO invalid client or file open mode |
| 381 | * -ENOSPC FIFO overflow (the flag is cleared after this error report) |
| 382 | * -EINVAL no enough user-space buffer to write the whole event |
| 383 | * -EFAULT seg. fault during copy to user space |
| 384 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 385 | static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count, |
| 386 | loff_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 388 | struct snd_seq_client *client = file->private_data; |
| 389 | struct snd_seq_fifo *fifo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | int err; |
| 391 | long result = 0; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 392 | struct snd_seq_event_cell *cell; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
| 394 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT)) |
| 395 | return -ENXIO; |
| 396 | |
| 397 | if (!access_ok(VERIFY_WRITE, buf, count)) |
| 398 | return -EFAULT; |
| 399 | |
| 400 | /* check client structures are in place */ |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 401 | if (snd_BUG_ON(!client)) |
| 402 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
| 404 | if (!client->accept_input || (fifo = client->data.user.fifo) == NULL) |
| 405 | return -ENXIO; |
| 406 | |
| 407 | if (atomic_read(&fifo->overflow) > 0) { |
| 408 | /* buffer overflow is detected */ |
| 409 | snd_seq_fifo_clear(fifo); |
| 410 | /* return error code */ |
| 411 | return -ENOSPC; |
| 412 | } |
| 413 | |
| 414 | cell = NULL; |
| 415 | err = 0; |
| 416 | snd_seq_fifo_lock(fifo); |
| 417 | |
| 418 | /* while data available in queue */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 419 | while (count >= sizeof(struct snd_seq_event)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | int nonblock; |
| 421 | |
| 422 | nonblock = (file->f_flags & O_NONBLOCK) || result > 0; |
| 423 | if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) { |
| 424 | break; |
| 425 | } |
| 426 | if (snd_seq_ev_is_variable(&cell->event)) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 427 | struct snd_seq_event tmpev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | tmpev = cell->event; |
| 429 | tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 430 | if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | err = -EFAULT; |
| 432 | break; |
| 433 | } |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 434 | count -= sizeof(struct snd_seq_event); |
| 435 | buf += sizeof(struct snd_seq_event); |
Clemens Ladisch | 4d23359 | 2005-09-05 10:35:20 +0200 | [diff] [blame] | 436 | err = snd_seq_expand_var_event(&cell->event, count, |
| 437 | (char __force *)buf, 0, |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 438 | sizeof(struct snd_seq_event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | if (err < 0) |
| 440 | break; |
| 441 | result += err; |
| 442 | count -= err; |
| 443 | buf += err; |
| 444 | } else { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 445 | if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | err = -EFAULT; |
| 447 | break; |
| 448 | } |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 449 | count -= sizeof(struct snd_seq_event); |
| 450 | buf += sizeof(struct snd_seq_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | snd_seq_cell_free(cell); |
| 453 | cell = NULL; /* to be sure */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 454 | result += sizeof(struct snd_seq_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | } |
| 456 | |
| 457 | if (err < 0) { |
| 458 | if (cell) |
| 459 | snd_seq_fifo_cell_putback(fifo, cell); |
| 460 | if (err == -EAGAIN && result > 0) |
| 461 | err = 0; |
| 462 | } |
| 463 | snd_seq_fifo_unlock(fifo); |
| 464 | |
| 465 | return (err < 0) ? err : result; |
| 466 | } |
| 467 | |
| 468 | |
| 469 | /* |
| 470 | * check access permission to the port |
| 471 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 472 | static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | { |
| 474 | if ((port->capability & flags) != flags) |
| 475 | return 0; |
| 476 | return flags; |
| 477 | } |
| 478 | |
| 479 | /* |
| 480 | * check if the destination client is available, and return the pointer |
| 481 | * if filter is non-zero, client filter bitmap is tested. |
| 482 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 483 | static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event, |
| 484 | int filter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 486 | struct snd_seq_client *dest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
| 488 | dest = snd_seq_client_use_ptr(event->dest.client); |
| 489 | if (dest == NULL) |
| 490 | return NULL; |
| 491 | if (! dest->accept_input) |
| 492 | goto __not_avail; |
| 493 | if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) && |
| 494 | ! test_bit(event->type, dest->event_filter)) |
| 495 | goto __not_avail; |
| 496 | if (filter && !(dest->filter & filter)) |
| 497 | goto __not_avail; |
| 498 | |
| 499 | return dest; /* ok - accessible */ |
| 500 | __not_avail: |
| 501 | snd_seq_client_unlock(dest); |
| 502 | return NULL; |
| 503 | } |
| 504 | |
| 505 | |
| 506 | /* |
| 507 | * Return the error event. |
| 508 | * |
| 509 | * If the receiver client is a user client, the original event is |
| 510 | * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If |
| 511 | * the original event is also variable length, the external data is |
| 512 | * copied after the event record. |
| 513 | * If the receiver client is a kernel client, the original event is |
| 514 | * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra |
| 515 | * kmalloc. |
| 516 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 517 | static int bounce_error_event(struct snd_seq_client *client, |
| 518 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | int err, int atomic, int hop) |
| 520 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 521 | struct snd_seq_event bounce_ev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | int result; |
| 523 | |
| 524 | if (client == NULL || |
| 525 | ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) || |
| 526 | ! client->accept_input) |
| 527 | return 0; /* ignored */ |
| 528 | |
| 529 | /* set up quoted error */ |
| 530 | memset(&bounce_ev, 0, sizeof(bounce_ev)); |
| 531 | bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR; |
| 532 | bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED; |
| 533 | bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT; |
| 534 | bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; |
| 535 | bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE; |
| 536 | bounce_ev.dest.client = client->number; |
| 537 | bounce_ev.dest.port = event->source.port; |
| 538 | bounce_ev.data.quote.origin = event->dest; |
| 539 | bounce_ev.data.quote.event = event; |
| 540 | bounce_ev.data.quote.value = -err; /* use positive value */ |
| 541 | result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1); |
| 542 | if (result < 0) { |
| 543 | client->event_lost++; |
| 544 | return result; |
| 545 | } |
| 546 | |
| 547 | return result; |
| 548 | } |
| 549 | |
| 550 | |
| 551 | /* |
| 552 | * rewrite the time-stamp of the event record with the curren time |
| 553 | * of the given queue. |
| 554 | * return non-zero if updated. |
| 555 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 556 | static int update_timestamp_of_queue(struct snd_seq_event *event, |
| 557 | int queue, int real_time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 559 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | |
| 561 | q = queueptr(queue); |
| 562 | if (! q) |
| 563 | return 0; |
| 564 | event->queue = queue; |
| 565 | event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK; |
| 566 | if (real_time) { |
| 567 | event->time.time = snd_seq_timer_get_cur_time(q->timer); |
| 568 | event->flags |= SNDRV_SEQ_TIME_STAMP_REAL; |
| 569 | } else { |
| 570 | event->time.tick = snd_seq_timer_get_cur_tick(q->timer); |
| 571 | event->flags |= SNDRV_SEQ_TIME_STAMP_TICK; |
| 572 | } |
| 573 | queuefree(q); |
| 574 | return 1; |
| 575 | } |
| 576 | |
| 577 | |
| 578 | /* |
| 579 | * deliver an event to the specified destination. |
| 580 | * if filter is non-zero, client filter bitmap is tested. |
| 581 | * |
| 582 | * RETURN VALUE: 0 : if succeeded |
| 583 | * <0 : error |
| 584 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 585 | static int snd_seq_deliver_single_event(struct snd_seq_client *client, |
| 586 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | int filter, int atomic, int hop) |
| 588 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 589 | struct snd_seq_client *dest = NULL; |
| 590 | struct snd_seq_client_port *dest_port = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | int result = -ENOENT; |
| 592 | int direct; |
| 593 | |
| 594 | direct = snd_seq_ev_is_direct(event); |
| 595 | |
| 596 | dest = get_event_dest_client(event, filter); |
| 597 | if (dest == NULL) |
| 598 | goto __skip; |
| 599 | dest_port = snd_seq_port_use_ptr(dest, event->dest.port); |
| 600 | if (dest_port == NULL) |
| 601 | goto __skip; |
| 602 | |
| 603 | /* check permission */ |
| 604 | if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) { |
| 605 | result = -EPERM; |
| 606 | goto __skip; |
| 607 | } |
| 608 | |
| 609 | if (dest_port->timestamping) |
| 610 | update_timestamp_of_queue(event, dest_port->time_queue, |
| 611 | dest_port->time_real); |
| 612 | |
| 613 | switch (dest->type) { |
| 614 | case USER_CLIENT: |
| 615 | if (dest->data.user.fifo) |
| 616 | result = snd_seq_fifo_event_in(dest->data.user.fifo, event); |
| 617 | break; |
| 618 | |
| 619 | case KERNEL_CLIENT: |
| 620 | if (dest_port->event_input == NULL) |
| 621 | break; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 622 | result = dest_port->event_input(event, direct, |
| 623 | dest_port->private_data, |
| 624 | atomic, hop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | break; |
| 626 | default: |
| 627 | break; |
| 628 | } |
| 629 | |
| 630 | __skip: |
| 631 | if (dest_port) |
| 632 | snd_seq_port_unlock(dest_port); |
| 633 | if (dest) |
| 634 | snd_seq_client_unlock(dest); |
| 635 | |
| 636 | if (result < 0 && !direct) { |
| 637 | result = bounce_error_event(client, event, result, atomic, hop); |
| 638 | } |
| 639 | return result; |
| 640 | } |
| 641 | |
| 642 | |
| 643 | /* |
| 644 | * send the event to all subscribers: |
| 645 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 646 | static int deliver_to_subscribers(struct snd_seq_client *client, |
| 647 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | int atomic, int hop) |
| 649 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 650 | struct snd_seq_subscribers *subs; |
Adam Goode | 2742325 | 2014-06-04 11:20:55 -0400 | [diff] [blame] | 651 | int err, result = 0, num_ev = 0; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 652 | struct snd_seq_event event_saved; |
| 653 | struct snd_seq_client_port *src_port; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 654 | struct snd_seq_port_subs_info *grp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
| 656 | src_port = snd_seq_port_use_ptr(client, event->source.port); |
| 657 | if (src_port == NULL) |
| 658 | return -EINVAL; /* invalid source port */ |
| 659 | /* save original event record */ |
| 660 | event_saved = *event; |
| 661 | grp = &src_port->c_src; |
| 662 | |
| 663 | /* lock list */ |
| 664 | if (atomic) |
| 665 | read_lock(&grp->list_lock); |
| 666 | else |
Takashi Iwai | ffb76bb | 2017-10-29 11:10:43 +0100 | [diff] [blame] | 667 | down_read_nested(&grp->list_mutex, hop); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 668 | list_for_each_entry(subs, &grp->list_head, src_list) { |
Takashi Iwai | 7f0973e | 2016-02-03 08:32:44 +0100 | [diff] [blame] | 669 | /* both ports ready? */ |
| 670 | if (atomic_read(&subs->ref_count) != 2) |
| 671 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | event->dest = subs->info.dest; |
| 673 | if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) |
| 674 | /* convert time according to flag with subscription */ |
| 675 | update_timestamp_of_queue(event, subs->info.queue, |
| 676 | subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL); |
| 677 | err = snd_seq_deliver_single_event(client, event, |
| 678 | 0, atomic, hop); |
Adam Goode | 2742325 | 2014-06-04 11:20:55 -0400 | [diff] [blame] | 679 | if (err < 0) { |
| 680 | /* save first error that occurs and continue */ |
| 681 | if (!result) |
| 682 | result = err; |
| 683 | continue; |
| 684 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | num_ev++; |
| 686 | /* restore original event record */ |
| 687 | *event = event_saved; |
| 688 | } |
| 689 | if (atomic) |
| 690 | read_unlock(&grp->list_lock); |
| 691 | else |
| 692 | up_read(&grp->list_mutex); |
| 693 | *event = event_saved; /* restore */ |
| 694 | snd_seq_port_unlock(src_port); |
Adam Goode | 2742325 | 2014-06-04 11:20:55 -0400 | [diff] [blame] | 695 | return (result < 0) ? result : num_ev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | } |
| 697 | |
| 698 | |
| 699 | #ifdef SUPPORT_BROADCAST |
| 700 | /* |
| 701 | * broadcast to all ports: |
| 702 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 703 | static int port_broadcast_event(struct snd_seq_client *client, |
| 704 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | int atomic, int hop) |
| 706 | { |
Adam Goode | 2742325 | 2014-06-04 11:20:55 -0400 | [diff] [blame] | 707 | int num_ev = 0, err, result = 0; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 708 | struct snd_seq_client *dest_client; |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 709 | struct snd_seq_client_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | |
| 711 | dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST); |
| 712 | if (dest_client == NULL) |
| 713 | return 0; /* no matching destination */ |
| 714 | |
| 715 | read_lock(&dest_client->ports_lock); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 716 | list_for_each_entry(port, &dest_client->ports_list_head, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | event->dest.port = port->addr.port; |
| 718 | /* pass NULL as source client to avoid error bounce */ |
| 719 | err = snd_seq_deliver_single_event(NULL, event, |
| 720 | SNDRV_SEQ_FILTER_BROADCAST, |
| 721 | atomic, hop); |
Adam Goode | 2742325 | 2014-06-04 11:20:55 -0400 | [diff] [blame] | 722 | if (err < 0) { |
| 723 | /* save first error that occurs and continue */ |
| 724 | if (!result) |
| 725 | result = err; |
| 726 | continue; |
| 727 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | num_ev++; |
| 729 | } |
| 730 | read_unlock(&dest_client->ports_lock); |
| 731 | snd_seq_client_unlock(dest_client); |
| 732 | event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */ |
Adam Goode | 2742325 | 2014-06-04 11:20:55 -0400 | [diff] [blame] | 733 | return (result < 0) ? result : num_ev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | } |
| 735 | |
| 736 | /* |
| 737 | * send the event to all clients: |
| 738 | * if destination port is also ADDRESS_BROADCAST, deliver to all ports. |
| 739 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 740 | static int broadcast_event(struct snd_seq_client *client, |
| 741 | struct snd_seq_event *event, int atomic, int hop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | { |
Adam Goode | 2742325 | 2014-06-04 11:20:55 -0400 | [diff] [blame] | 743 | int err, result = 0, num_ev = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | int dest; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 745 | struct snd_seq_addr addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
| 747 | addr = event->dest; /* save */ |
| 748 | |
| 749 | for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) { |
| 750 | /* don't send to itself */ |
| 751 | if (dest == client->number) |
| 752 | continue; |
| 753 | event->dest.client = dest; |
| 754 | event->dest.port = addr.port; |
| 755 | if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST) |
| 756 | err = port_broadcast_event(client, event, atomic, hop); |
| 757 | else |
| 758 | /* pass NULL as source client to avoid error bounce */ |
| 759 | err = snd_seq_deliver_single_event(NULL, event, |
| 760 | SNDRV_SEQ_FILTER_BROADCAST, |
| 761 | atomic, hop); |
Adam Goode | 2742325 | 2014-06-04 11:20:55 -0400 | [diff] [blame] | 762 | if (err < 0) { |
| 763 | /* save first error that occurs and continue */ |
| 764 | if (!result) |
| 765 | result = err; |
| 766 | continue; |
| 767 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | num_ev += err; |
| 769 | } |
| 770 | event->dest = addr; /* restore */ |
Adam Goode | 2742325 | 2014-06-04 11:20:55 -0400 | [diff] [blame] | 771 | return (result < 0) ? result : num_ev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | } |
| 773 | |
| 774 | |
| 775 | /* multicast - not supported yet */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 776 | static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | int atomic, int hop) |
| 778 | { |
Takashi Iwai | 04cc79a | 2014-02-04 18:24:34 +0100 | [diff] [blame] | 779 | pr_debug("ALSA: seq: multicast not supported yet.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | return 0; /* ignored */ |
| 781 | } |
| 782 | #endif /* SUPPORT_BROADCAST */ |
| 783 | |
| 784 | |
| 785 | /* deliver an event to the destination port(s). |
| 786 | * if the event is to subscribers or broadcast, the event is dispatched |
| 787 | * to multiple targets. |
| 788 | * |
| 789 | * RETURN VALUE: n > 0 : the number of delivered events. |
| 790 | * n == 0 : the event was not passed to any client. |
| 791 | * n < 0 : error - event was not processed. |
| 792 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 793 | static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | int atomic, int hop) |
| 795 | { |
| 796 | int result; |
| 797 | |
| 798 | hop++; |
| 799 | if (hop >= SNDRV_SEQ_MAX_HOPS) { |
Takashi Iwai | 04cc79a | 2014-02-04 18:24:34 +0100 | [diff] [blame] | 800 | pr_debug("ALSA: seq: too long delivery path (%d:%d->%d:%d)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | event->source.client, event->source.port, |
| 802 | event->dest.client, event->dest.port); |
| 803 | return -EMLINK; |
| 804 | } |
| 805 | |
| 806 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS || |
| 807 | event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) |
| 808 | result = deliver_to_subscribers(client, event, atomic, hop); |
| 809 | #ifdef SUPPORT_BROADCAST |
| 810 | else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST || |
| 811 | event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST) |
| 812 | result = broadcast_event(client, event, atomic, hop); |
| 813 | else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS) |
| 814 | result = multicast_event(client, event, atomic, hop); |
| 815 | else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST) |
| 816 | result = port_broadcast_event(client, event, atomic, hop); |
| 817 | #endif |
| 818 | else |
| 819 | result = snd_seq_deliver_single_event(client, event, 0, atomic, hop); |
| 820 | |
| 821 | return result; |
| 822 | } |
| 823 | |
| 824 | /* |
| 825 | * dispatch an event cell: |
| 826 | * This function is called only from queue check routines in timer |
| 827 | * interrupts or after enqueued. |
| 828 | * The event cell shall be released or re-queued in this function. |
| 829 | * |
| 830 | * RETURN VALUE: n > 0 : the number of delivered events. |
| 831 | * n == 0 : the event was not passed to any client. |
| 832 | * n < 0 : error - event was not processed. |
| 833 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 834 | int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 836 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | int result; |
| 838 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 839 | if (snd_BUG_ON(!cell)) |
| 840 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | |
| 842 | client = snd_seq_client_use_ptr(cell->event.source.client); |
| 843 | if (client == NULL) { |
| 844 | snd_seq_cell_free(cell); /* release this cell */ |
| 845 | return -EINVAL; |
| 846 | } |
| 847 | |
| 848 | if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) { |
| 849 | /* NOTE event: |
| 850 | * the event cell is re-used as a NOTE-OFF event and |
| 851 | * enqueued again. |
| 852 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 853 | struct snd_seq_event tmpev, *ev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | |
| 855 | /* reserve this event to enqueue note-off later */ |
| 856 | tmpev = cell->event; |
| 857 | tmpev.type = SNDRV_SEQ_EVENT_NOTEON; |
| 858 | result = snd_seq_deliver_event(client, &tmpev, atomic, hop); |
| 859 | |
| 860 | /* |
| 861 | * This was originally a note event. We now re-use the |
| 862 | * cell for the note-off event. |
| 863 | */ |
| 864 | |
| 865 | ev = &cell->event; |
| 866 | ev->type = SNDRV_SEQ_EVENT_NOTEOFF; |
| 867 | ev->flags |= SNDRV_SEQ_PRIORITY_HIGH; |
| 868 | |
| 869 | /* add the duration time */ |
| 870 | switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) { |
| 871 | case SNDRV_SEQ_TIME_STAMP_TICK: |
| 872 | ev->time.tick += ev->data.note.duration; |
| 873 | break; |
| 874 | case SNDRV_SEQ_TIME_STAMP_REAL: |
| 875 | /* unit for duration is ms */ |
| 876 | ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000); |
| 877 | ev->time.time.tv_sec += ev->data.note.duration / 1000 + |
| 878 | ev->time.time.tv_nsec / 1000000000; |
| 879 | ev->time.time.tv_nsec %= 1000000000; |
| 880 | break; |
| 881 | } |
| 882 | ev->data.note.velocity = ev->data.note.off_velocity; |
| 883 | |
| 884 | /* Now queue this cell as the note off event */ |
| 885 | if (snd_seq_enqueue_event(cell, atomic, hop) < 0) |
| 886 | snd_seq_cell_free(cell); /* release this cell */ |
| 887 | |
| 888 | } else { |
| 889 | /* Normal events: |
| 890 | * event cell is freed after processing the event |
| 891 | */ |
| 892 | |
| 893 | result = snd_seq_deliver_event(client, &cell->event, atomic, hop); |
| 894 | snd_seq_cell_free(cell); |
| 895 | } |
| 896 | |
| 897 | snd_seq_client_unlock(client); |
| 898 | return result; |
| 899 | } |
| 900 | |
| 901 | |
| 902 | /* Allocate a cell from client pool and enqueue it to queue: |
| 903 | * if pool is empty and blocking is TRUE, sleep until a new cell is |
| 904 | * available. |
| 905 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 906 | static int snd_seq_client_enqueue_event(struct snd_seq_client *client, |
| 907 | struct snd_seq_event *event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | struct file *file, int blocking, |
Takashi Iwai | ec00116 | 2018-03-05 22:06:09 +0100 | [diff] [blame] | 909 | int atomic, int hop, |
| 910 | struct mutex *mutexp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 912 | struct snd_seq_event_cell *cell; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | int err; |
| 914 | |
| 915 | /* special queue values - force direct passing */ |
| 916 | if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { |
| 917 | event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; |
| 918 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; |
| 919 | } else |
| 920 | #ifdef SUPPORT_BROADCAST |
| 921 | if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) { |
| 922 | event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST; |
| 923 | event->queue = SNDRV_SEQ_QUEUE_DIRECT; |
| 924 | } |
| 925 | #endif |
| 926 | if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { |
| 927 | /* check presence of source port */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 928 | struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | if (src_port == NULL) |
| 930 | return -EINVAL; |
| 931 | snd_seq_port_unlock(src_port); |
| 932 | } |
| 933 | |
| 934 | /* direct event processing without enqueued */ |
| 935 | if (snd_seq_ev_is_direct(event)) { |
| 936 | if (event->type == SNDRV_SEQ_EVENT_NOTE) |
| 937 | return -EINVAL; /* this event must be enqueued! */ |
| 938 | return snd_seq_deliver_event(client, event, atomic, hop); |
| 939 | } |
| 940 | |
| 941 | /* Not direct, normal queuing */ |
| 942 | if (snd_seq_queue_is_used(event->queue, client->number) <= 0) |
| 943 | return -EINVAL; /* invalid queue */ |
| 944 | if (! snd_seq_write_pool_allocated(client)) |
| 945 | return -ENXIO; /* queue is not allocated */ |
| 946 | |
| 947 | /* allocate an event cell */ |
Takashi Iwai | ec00116 | 2018-03-05 22:06:09 +0100 | [diff] [blame] | 948 | err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, |
| 949 | file, mutexp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | if (err < 0) |
| 951 | return err; |
| 952 | |
| 953 | /* we got a cell. enqueue it. */ |
| 954 | if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) { |
| 955 | snd_seq_cell_free(cell); |
| 956 | return err; |
| 957 | } |
| 958 | |
| 959 | return 0; |
| 960 | } |
| 961 | |
| 962 | |
| 963 | /* |
| 964 | * check validity of event type and data length. |
| 965 | * return non-zero if invalid. |
| 966 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 967 | static int check_event_type_and_length(struct snd_seq_event *ev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | { |
| 969 | switch (snd_seq_ev_length_type(ev)) { |
| 970 | case SNDRV_SEQ_EVENT_LENGTH_FIXED: |
| 971 | if (snd_seq_ev_is_variable_type(ev)) |
| 972 | return -EINVAL; |
| 973 | break; |
| 974 | case SNDRV_SEQ_EVENT_LENGTH_VARIABLE: |
| 975 | if (! snd_seq_ev_is_variable_type(ev) || |
| 976 | (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN) |
| 977 | return -EINVAL; |
| 978 | break; |
| 979 | case SNDRV_SEQ_EVENT_LENGTH_VARUSR: |
Takashi Iwai | e5723b4 | 2007-10-30 12:17:17 +0100 | [diff] [blame] | 980 | if (! snd_seq_ev_is_direct(ev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | return -EINVAL; |
| 982 | break; |
| 983 | } |
| 984 | return 0; |
| 985 | } |
| 986 | |
| 987 | |
| 988 | /* handle write() */ |
| 989 | /* possible error values: |
| 990 | * -ENXIO invalid client or file open mode |
| 991 | * -ENOMEM malloc failed |
| 992 | * -EFAULT seg. fault during copy from user space |
| 993 | * -EINVAL invalid event |
| 994 | * -EAGAIN no space in output pool |
| 995 | * -EINTR interrupts while sleep |
| 996 | * -EMLINK too many hops |
| 997 | * others depends on return value from driver callback |
| 998 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 999 | static ssize_t snd_seq_write(struct file *file, const char __user *buf, |
| 1000 | size_t count, loff_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1002 | struct snd_seq_client *client = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | int written = 0, len; |
Takashi Iwai | 869182f | 2018-02-12 15:20:51 +0100 | [diff] [blame] | 1004 | int err; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1005 | struct snd_seq_event event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | |
| 1007 | if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT)) |
| 1008 | return -ENXIO; |
| 1009 | |
| 1010 | /* check client structures are in place */ |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1011 | if (snd_BUG_ON(!client)) |
| 1012 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | |
| 1014 | if (!client->accept_output || client->pool == NULL) |
| 1015 | return -ENXIO; |
| 1016 | |
| 1017 | /* allocate the pool now if the pool is not allocated yet */ |
Takashi Iwai | ec00116 | 2018-03-05 22:06:09 +0100 | [diff] [blame] | 1018 | mutex_lock(&client->ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) { |
Takashi Iwai | 869182f | 2018-02-12 15:20:51 +0100 | [diff] [blame] | 1020 | err = snd_seq_pool_init(client->pool); |
Takashi Iwai | 869182f | 2018-02-12 15:20:51 +0100 | [diff] [blame] | 1021 | if (err < 0) |
Takashi Iwai | ec00116 | 2018-03-05 22:06:09 +0100 | [diff] [blame] | 1022 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | } |
| 1024 | |
| 1025 | /* only process whole events */ |
Takashi Iwai | 869182f | 2018-02-12 15:20:51 +0100 | [diff] [blame] | 1026 | err = -EINVAL; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1027 | while (count >= sizeof(struct snd_seq_event)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | /* Read in the event header from the user */ |
| 1029 | len = sizeof(event); |
| 1030 | if (copy_from_user(&event, buf, len)) { |
| 1031 | err = -EFAULT; |
| 1032 | break; |
| 1033 | } |
| 1034 | event.source.client = client->number; /* fill in client number */ |
| 1035 | /* Check for extension data length */ |
| 1036 | if (check_event_type_and_length(&event)) { |
| 1037 | err = -EINVAL; |
| 1038 | break; |
| 1039 | } |
| 1040 | |
| 1041 | /* check for special events */ |
| 1042 | if (event.type == SNDRV_SEQ_EVENT_NONE) |
| 1043 | goto __skip_event; |
| 1044 | else if (snd_seq_ev_is_reserved(&event)) { |
| 1045 | err = -EINVAL; |
| 1046 | break; |
| 1047 | } |
| 1048 | |
| 1049 | if (snd_seq_ev_is_variable(&event)) { |
| 1050 | int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK; |
| 1051 | if ((size_t)(extlen + len) > count) { |
| 1052 | /* back out, will get an error this time or next */ |
| 1053 | err = -EINVAL; |
| 1054 | break; |
| 1055 | } |
| 1056 | /* set user space pointer */ |
| 1057 | event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR; |
Clemens Ladisch | 4d23359 | 2005-09-05 10:35:20 +0200 | [diff] [blame] | 1058 | event.data.ext.ptr = (char __force *)buf |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1059 | + sizeof(struct snd_seq_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | len += extlen; /* increment data length */ |
| 1061 | } else { |
| 1062 | #ifdef CONFIG_COMPAT |
| 1063 | if (client->convert32 && snd_seq_ev_is_varusr(&event)) { |
Clemens Ladisch | fea952e | 2011-02-14 11:00:47 +0100 | [diff] [blame] | 1064 | void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | event.data.ext.ptr = ptr; |
| 1066 | } |
| 1067 | #endif |
| 1068 | } |
| 1069 | |
| 1070 | /* ok, enqueue it */ |
| 1071 | err = snd_seq_client_enqueue_event(client, &event, file, |
| 1072 | !(file->f_flags & O_NONBLOCK), |
Takashi Iwai | ec00116 | 2018-03-05 22:06:09 +0100 | [diff] [blame] | 1073 | 0, 0, &client->ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | if (err < 0) |
| 1075 | break; |
| 1076 | |
| 1077 | __skip_event: |
| 1078 | /* Update pointers and counts */ |
| 1079 | count -= len; |
| 1080 | buf += len; |
| 1081 | written += len; |
| 1082 | } |
| 1083 | |
Takashi Iwai | ec00116 | 2018-03-05 22:06:09 +0100 | [diff] [blame] | 1084 | out: |
| 1085 | mutex_unlock(&client->ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | return written ? written : err; |
| 1087 | } |
| 1088 | |
| 1089 | |
| 1090 | /* |
| 1091 | * handle polling |
| 1092 | */ |
| 1093 | static unsigned int snd_seq_poll(struct file *file, poll_table * wait) |
| 1094 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1095 | struct snd_seq_client *client = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | unsigned int mask = 0; |
| 1097 | |
| 1098 | /* check client structures are in place */ |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1099 | if (snd_BUG_ON(!client)) |
| 1100 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
| 1102 | if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) && |
| 1103 | client->data.user.fifo) { |
| 1104 | |
| 1105 | /* check if data is available in the outqueue */ |
| 1106 | if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait)) |
| 1107 | mask |= POLLIN | POLLRDNORM; |
| 1108 | } |
| 1109 | |
| 1110 | if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) { |
| 1111 | |
| 1112 | /* check if data is available in the pool */ |
| 1113 | if (!snd_seq_write_pool_allocated(client) || |
| 1114 | snd_seq_pool_poll_wait(client->pool, file, wait)) |
| 1115 | mask |= POLLOUT | POLLWRNORM; |
| 1116 | } |
| 1117 | |
| 1118 | return mask; |
| 1119 | } |
| 1120 | |
| 1121 | |
| 1122 | /*-----------------------------------------------------*/ |
| 1123 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1124 | static int snd_seq_ioctl_pversion(struct snd_seq_client *client, void *arg) |
| 1125 | { |
| 1126 | int *pversion = arg; |
| 1127 | |
| 1128 | *pversion = SNDRV_SEQ_VERSION; |
| 1129 | return 0; |
| 1130 | } |
| 1131 | |
| 1132 | static int snd_seq_ioctl_client_id(struct snd_seq_client *client, void *arg) |
| 1133 | { |
| 1134 | int *client_id = arg; |
| 1135 | |
| 1136 | *client_id = client->number; |
| 1137 | return 0; |
| 1138 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
| 1140 | /* SYSTEM_INFO ioctl() */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1141 | static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1143 | struct snd_seq_system_info *info = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1145 | memset(info, 0, sizeof(*info)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | /* fill the info fields */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1147 | info->queues = SNDRV_SEQ_MAX_QUEUES; |
| 1148 | info->clients = SNDRV_SEQ_MAX_CLIENTS; |
| 1149 | info->ports = SNDRV_SEQ_MAX_PORTS; |
| 1150 | info->channels = 256; /* fixed limit */ |
| 1151 | info->cur_clients = client_usage.cur; |
| 1152 | info->cur_queues = snd_seq_queue_get_cur_queues(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | return 0; |
| 1155 | } |
| 1156 | |
| 1157 | |
| 1158 | /* RUNNING_MODE ioctl() */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1159 | static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1161 | struct snd_seq_running_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1162 | struct snd_seq_client *cptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | int err = 0; |
| 1164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | /* requested client number */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1166 | cptr = snd_seq_client_use_ptr(info->client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | if (cptr == NULL) |
| 1168 | return -ENOENT; /* don't change !!! */ |
| 1169 | |
| 1170 | #ifdef SNDRV_BIG_ENDIAN |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1171 | if (!info->big_endian) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | err = -EINVAL; |
| 1173 | goto __err; |
| 1174 | } |
| 1175 | #else |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1176 | if (info->big_endian) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | err = -EINVAL; |
| 1178 | goto __err; |
| 1179 | } |
| 1180 | |
| 1181 | #endif |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1182 | if (info->cpu_mode > sizeof(long)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | err = -EINVAL; |
| 1184 | goto __err; |
| 1185 | } |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1186 | cptr->convert32 = (info->cpu_mode < sizeof(long)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | __err: |
| 1188 | snd_seq_client_unlock(cptr); |
| 1189 | return err; |
| 1190 | } |
| 1191 | |
| 1192 | /* CLIENT_INFO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1193 | static void get_client_info(struct snd_seq_client *cptr, |
| 1194 | struct snd_seq_client_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | { |
| 1196 | info->client = cptr->number; |
| 1197 | |
| 1198 | /* fill the info fields */ |
| 1199 | info->type = cptr->type; |
| 1200 | strcpy(info->name, cptr->name); |
| 1201 | info->filter = cptr->filter; |
| 1202 | info->event_lost = cptr->event_lost; |
| 1203 | memcpy(info->event_filter, cptr->event_filter, 32); |
| 1204 | info->num_ports = cptr->num_ports; |
Martin Koegler | a1ce94d | 2016-03-02 19:26:28 +0100 | [diff] [blame] | 1205 | |
| 1206 | if (cptr->type == USER_CLIENT) |
| 1207 | info->pid = pid_vnr(cptr->data.user.owner); |
| 1208 | else |
| 1209 | info->pid = -1; |
| 1210 | |
| 1211 | if (cptr->type == KERNEL_CLIENT) |
| 1212 | info->card = cptr->data.kernel.card ? cptr->data.kernel.card->number : -1; |
| 1213 | else |
| 1214 | info->card = -1; |
| 1215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | memset(info->reserved, 0, sizeof(info->reserved)); |
| 1217 | } |
| 1218 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1219 | static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1220 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1222 | struct snd_seq_client_info *client_info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1223 | struct snd_seq_client *cptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | |
| 1225 | /* requested client number */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1226 | cptr = snd_seq_client_use_ptr(client_info->client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | if (cptr == NULL) |
| 1228 | return -ENOENT; /* don't change !!! */ |
| 1229 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1230 | get_client_info(cptr, client_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | snd_seq_client_unlock(cptr); |
| 1232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | return 0; |
| 1234 | } |
| 1235 | |
| 1236 | |
| 1237 | /* CLIENT_INFO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1238 | static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1239 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1241 | struct snd_seq_client_info *client_info = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | |
| 1243 | /* it is not allowed to set the info fields for an another client */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1244 | if (client->number != client_info->client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | return -EPERM; |
| 1246 | /* also client type must be set now */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1247 | if (client->type != client_info->type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | return -EINVAL; |
| 1249 | |
| 1250 | /* fill the info fields */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1251 | if (client_info->name[0]) |
Zubin Mithra | c35bf96 | 2019-04-04 14:33:55 -0700 | [diff] [blame] | 1252 | strscpy(client->name, client_info->name, sizeof(client->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1254 | client->filter = client_info->filter; |
| 1255 | client->event_lost = client_info->event_lost; |
| 1256 | memcpy(client->event_filter, client_info->event_filter, 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | |
| 1258 | return 0; |
| 1259 | } |
| 1260 | |
| 1261 | |
| 1262 | /* |
| 1263 | * CREATE PORT ioctl() |
| 1264 | */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1265 | static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1267 | struct snd_seq_port_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1268 | struct snd_seq_client_port *port; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1269 | struct snd_seq_port_callback *callback; |
Takashi Iwai | 35b8486 | 2017-10-09 11:09:20 +0200 | [diff] [blame] | 1270 | int port_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | /* it is not allowed to create the port for an another client */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1273 | if (info->addr.client != client->number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | return -EPERM; |
| 1275 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1276 | port = snd_seq_create_port(client, (info->flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info->addr.port : -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | if (port == NULL) |
| 1278 | return -ENOMEM; |
| 1279 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1280 | if (client->type == USER_CLIENT && info->kernel) { |
Takashi Iwai | 35b8486 | 2017-10-09 11:09:20 +0200 | [diff] [blame] | 1281 | port_idx = port->addr.port; |
| 1282 | snd_seq_port_unlock(port); |
| 1283 | snd_seq_delete_port(client, port_idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | return -EINVAL; |
| 1285 | } |
| 1286 | if (client->type == KERNEL_CLIENT) { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1287 | if ((callback = info->kernel) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | if (callback->owner) |
| 1289 | port->owner = callback->owner; |
| 1290 | port->private_data = callback->private_data; |
| 1291 | port->private_free = callback->private_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | port->event_input = callback->event_input; |
| 1293 | port->c_src.open = callback->subscribe; |
| 1294 | port->c_src.close = callback->unsubscribe; |
| 1295 | port->c_dest.open = callback->use; |
| 1296 | port->c_dest.close = callback->unuse; |
| 1297 | } |
| 1298 | } |
| 1299 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1300 | info->addr = port->addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1302 | snd_seq_set_port_info(port, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); |
Takashi Iwai | 35b8486 | 2017-10-09 11:09:20 +0200 | [diff] [blame] | 1304 | snd_seq_port_unlock(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | return 0; |
| 1307 | } |
| 1308 | |
| 1309 | /* |
| 1310 | * DELETE PORT ioctl() |
| 1311 | */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1312 | static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1314 | struct snd_seq_port_info *info = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | int err; |
| 1316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | /* it is not allowed to remove the port for an another client */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1318 | if (info->addr.client != client->number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | return -EPERM; |
| 1320 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1321 | err = snd_seq_delete_port(client, info->addr.port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | if (err >= 0) |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1323 | snd_seq_system_client_ev_port_exit(client->number, info->addr.port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | return err; |
| 1325 | } |
| 1326 | |
| 1327 | |
| 1328 | /* |
| 1329 | * GET_PORT_INFO ioctl() (on any client) |
| 1330 | */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1331 | static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1333 | struct snd_seq_port_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1334 | struct snd_seq_client *cptr; |
| 1335 | struct snd_seq_client_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1337 | cptr = snd_seq_client_use_ptr(info->addr.client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | if (cptr == NULL) |
| 1339 | return -ENXIO; |
| 1340 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1341 | port = snd_seq_port_use_ptr(cptr, info->addr.port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | if (port == NULL) { |
| 1343 | snd_seq_client_unlock(cptr); |
| 1344 | return -ENOENT; /* don't change */ |
| 1345 | } |
| 1346 | |
| 1347 | /* get port info */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1348 | snd_seq_get_port_info(port, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | snd_seq_port_unlock(port); |
| 1350 | snd_seq_client_unlock(cptr); |
| 1351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | return 0; |
| 1353 | } |
| 1354 | |
| 1355 | |
| 1356 | /* |
| 1357 | * SET_PORT_INFO ioctl() (only ports on this/own client) |
| 1358 | */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1359 | static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1361 | struct snd_seq_port_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1362 | struct snd_seq_client_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1364 | if (info->addr.client != client->number) /* only set our own ports ! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | return -EPERM; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1366 | port = snd_seq_port_use_ptr(client, info->addr.port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | if (port) { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1368 | snd_seq_set_port_info(port, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | snd_seq_port_unlock(port); |
| 1370 | } |
| 1371 | return 0; |
| 1372 | } |
| 1373 | |
| 1374 | |
| 1375 | /* |
| 1376 | * port subscription (connection) |
| 1377 | */ |
| 1378 | #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ) |
| 1379 | #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE) |
| 1380 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1381 | static int check_subscription_permission(struct snd_seq_client *client, |
| 1382 | struct snd_seq_client_port *sport, |
| 1383 | struct snd_seq_client_port *dport, |
| 1384 | struct snd_seq_port_subscribe *subs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | { |
| 1386 | if (client->number != subs->sender.client && |
| 1387 | client->number != subs->dest.client) { |
| 1388 | /* connection by third client - check export permission */ |
| 1389 | if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) |
| 1390 | return -EPERM; |
| 1391 | if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) |
| 1392 | return -EPERM; |
| 1393 | } |
| 1394 | |
| 1395 | /* check read permission */ |
| 1396 | /* if sender or receiver is the subscribing client itself, |
| 1397 | * no permission check is necessary |
| 1398 | */ |
| 1399 | if (client->number != subs->sender.client) { |
| 1400 | if (! check_port_perm(sport, PERM_RD)) |
| 1401 | return -EPERM; |
| 1402 | } |
| 1403 | /* check write permission */ |
| 1404 | if (client->number != subs->dest.client) { |
| 1405 | if (! check_port_perm(dport, PERM_WR)) |
| 1406 | return -EPERM; |
| 1407 | } |
| 1408 | return 0; |
| 1409 | } |
| 1410 | |
| 1411 | /* |
| 1412 | * send an subscription notify event to user client: |
| 1413 | * client must be user client. |
| 1414 | */ |
| 1415 | int snd_seq_client_notify_subscription(int client, int port, |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1416 | struct snd_seq_port_subscribe *info, |
| 1417 | int evtype) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1419 | struct snd_seq_event event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | |
| 1421 | memset(&event, 0, sizeof(event)); |
| 1422 | event.type = evtype; |
| 1423 | event.data.connect.dest = info->dest; |
| 1424 | event.data.connect.sender = info->sender; |
| 1425 | |
| 1426 | return snd_seq_system_notify(client, port, &event); /* non-atomic */ |
| 1427 | } |
| 1428 | |
| 1429 | |
| 1430 | /* |
| 1431 | * add to port's subscription list IOCTL interface |
| 1432 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1433 | static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1434 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1436 | struct snd_seq_port_subscribe *subs = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | int result = -EINVAL; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1438 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
| 1439 | struct snd_seq_client_port *sport = NULL, *dport = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1441 | if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | goto __end; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1443 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | goto __end; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1445 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | goto __end; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1447 | if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | goto __end; |
| 1449 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1450 | result = check_subscription_permission(client, sport, dport, subs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | if (result < 0) |
| 1452 | goto __end; |
| 1453 | |
| 1454 | /* connect them */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1455 | result = snd_seq_port_connect(client, sender, sport, receiver, dport, subs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | if (! result) /* broadcast announce */ |
| 1457 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1458 | subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | __end: |
| 1460 | if (sport) |
| 1461 | snd_seq_port_unlock(sport); |
| 1462 | if (dport) |
| 1463 | snd_seq_port_unlock(dport); |
| 1464 | if (sender) |
| 1465 | snd_seq_client_unlock(sender); |
| 1466 | if (receiver) |
| 1467 | snd_seq_client_unlock(receiver); |
| 1468 | return result; |
| 1469 | } |
| 1470 | |
| 1471 | |
| 1472 | /* |
| 1473 | * remove from port's subscription list |
| 1474 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1475 | static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1476 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1478 | struct snd_seq_port_subscribe *subs = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | int result = -ENXIO; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1480 | struct snd_seq_client *receiver = NULL, *sender = NULL; |
| 1481 | struct snd_seq_client_port *sport = NULL, *dport = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1483 | if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | goto __end; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1485 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | goto __end; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1487 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | goto __end; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1489 | if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | goto __end; |
| 1491 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1492 | result = check_subscription_permission(client, sport, dport, subs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | if (result < 0) |
| 1494 | goto __end; |
| 1495 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1496 | result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, subs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | if (! result) /* broadcast announce */ |
| 1498 | snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1499 | subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | __end: |
| 1501 | if (sport) |
| 1502 | snd_seq_port_unlock(sport); |
| 1503 | if (dport) |
| 1504 | snd_seq_port_unlock(dport); |
| 1505 | if (sender) |
| 1506 | snd_seq_client_unlock(sender); |
| 1507 | if (receiver) |
| 1508 | snd_seq_client_unlock(receiver); |
| 1509 | return result; |
| 1510 | } |
| 1511 | |
| 1512 | |
| 1513 | /* CREATE_QUEUE ioctl() */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1514 | static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1516 | struct snd_seq_queue_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1517 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | |
Daniel Mentz | bafb25c | 2017-08-14 14:46:01 -0700 | [diff] [blame] | 1519 | q = snd_seq_queue_alloc(client->number, info->locked, info->flags); |
| 1520 | if (IS_ERR(q)) |
| 1521 | return PTR_ERR(q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1523 | info->queue = q->queue; |
| 1524 | info->locked = q->locked; |
| 1525 | info->owner = q->owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | |
| 1527 | /* set queue name */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1528 | if (!info->name[0]) |
| 1529 | snprintf(info->name, sizeof(info->name), "Queue-%d", q->queue); |
Zubin Mithra | c35bf96 | 2019-04-04 14:33:55 -0700 | [diff] [blame] | 1530 | strscpy(q->name, info->name, sizeof(q->name)); |
Daniel Mentz | bafb25c | 2017-08-14 14:46:01 -0700 | [diff] [blame] | 1531 | snd_use_lock_free(&q->use_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | return 0; |
| 1534 | } |
| 1535 | |
| 1536 | /* DELETE_QUEUE ioctl() */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1537 | static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1539 | struct snd_seq_queue_info *info = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1541 | return snd_seq_queue_delete(client->number, info->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | } |
| 1543 | |
| 1544 | /* GET_QUEUE_INFO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1545 | static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1546 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1548 | struct snd_seq_queue_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1549 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1551 | q = queueptr(info->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | if (q == NULL) |
| 1553 | return -EINVAL; |
| 1554 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1555 | memset(info, 0, sizeof(*info)); |
| 1556 | info->queue = q->queue; |
| 1557 | info->owner = q->owner; |
| 1558 | info->locked = q->locked; |
| 1559 | strlcpy(info->name, q->name, sizeof(info->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | queuefree(q); |
| 1561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | return 0; |
| 1563 | } |
| 1564 | |
| 1565 | /* SET_QUEUE_INFO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1566 | static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1567 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1569 | struct snd_seq_queue_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1570 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1572 | if (info->owner != client->number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | return -EINVAL; |
| 1574 | |
| 1575 | /* change owner/locked permission */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1576 | if (snd_seq_queue_check_access(info->queue, client->number)) { |
| 1577 | if (snd_seq_queue_set_owner(info->queue, client->number, info->locked) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | return -EPERM; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1579 | if (info->locked) |
| 1580 | snd_seq_queue_use(info->queue, client->number, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | } else { |
| 1582 | return -EPERM; |
| 1583 | } |
| 1584 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1585 | q = queueptr(info->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | if (! q) |
| 1587 | return -EINVAL; |
| 1588 | if (q->owner != client->number) { |
| 1589 | queuefree(q); |
| 1590 | return -EPERM; |
| 1591 | } |
Zubin Mithra | c35bf96 | 2019-04-04 14:33:55 -0700 | [diff] [blame] | 1592 | strscpy(q->name, info->name, sizeof(q->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | queuefree(q); |
| 1594 | |
| 1595 | return 0; |
| 1596 | } |
| 1597 | |
| 1598 | /* GET_NAMED_QUEUE ioctl() */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1599 | static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, |
| 1600 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1602 | struct snd_seq_queue_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1603 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1605 | q = snd_seq_queue_find_name(info->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | if (q == NULL) |
| 1607 | return -EINVAL; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1608 | info->queue = q->queue; |
| 1609 | info->owner = q->owner; |
| 1610 | info->locked = q->locked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | queuefree(q); |
| 1612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | return 0; |
| 1614 | } |
| 1615 | |
| 1616 | /* GET_QUEUE_STATUS ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1617 | static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1618 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1620 | struct snd_seq_queue_status *status = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1621 | struct snd_seq_queue *queue; |
| 1622 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1624 | queue = queueptr(status->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | if (queue == NULL) |
| 1626 | return -EINVAL; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1627 | memset(status, 0, sizeof(*status)); |
| 1628 | status->queue = queue->queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | |
| 1630 | tmr = queue->timer; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1631 | status->events = queue->tickq->cells + queue->timeq->cells; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1633 | status->time = snd_seq_timer_get_cur_time(tmr); |
| 1634 | status->tick = snd_seq_timer_get_cur_tick(tmr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1636 | status->running = tmr->running; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1638 | status->flags = queue->flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | queuefree(queue); |
| 1640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | return 0; |
| 1642 | } |
| 1643 | |
| 1644 | |
| 1645 | /* GET_QUEUE_TEMPO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1646 | static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1647 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1649 | struct snd_seq_queue_tempo *tempo = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1650 | struct snd_seq_queue *queue; |
| 1651 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1653 | queue = queueptr(tempo->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | if (queue == NULL) |
| 1655 | return -EINVAL; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1656 | memset(tempo, 0, sizeof(*tempo)); |
| 1657 | tempo->queue = queue->queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | |
| 1659 | tmr = queue->timer; |
| 1660 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1661 | tempo->tempo = tmr->tempo; |
| 1662 | tempo->ppq = tmr->ppq; |
| 1663 | tempo->skew_value = tmr->skew; |
| 1664 | tempo->skew_base = tmr->skew_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | queuefree(queue); |
| 1666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | return 0; |
| 1668 | } |
| 1669 | |
| 1670 | |
| 1671 | /* SET_QUEUE_TEMPO ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1672 | int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | { |
| 1674 | if (!snd_seq_queue_check_access(tempo->queue, client)) |
| 1675 | return -EPERM; |
| 1676 | return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo); |
| 1677 | } |
| 1678 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 1679 | EXPORT_SYMBOL(snd_seq_set_queue_tempo); |
| 1680 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1681 | static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1682 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1684 | struct snd_seq_queue_tempo *tempo = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1687 | result = snd_seq_set_queue_tempo(client->number, tempo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | return result < 0 ? result : 0; |
| 1689 | } |
| 1690 | |
| 1691 | |
| 1692 | /* GET_QUEUE_TIMER ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1693 | static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1694 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1696 | struct snd_seq_queue_timer *timer = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1697 | struct snd_seq_queue *queue; |
| 1698 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1700 | queue = queueptr(timer->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | if (queue == NULL) |
| 1702 | return -EINVAL; |
| 1703 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1704 | if (mutex_lock_interruptible(&queue->timer_mutex)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | queuefree(queue); |
| 1706 | return -ERESTARTSYS; |
| 1707 | } |
| 1708 | tmr = queue->timer; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1709 | memset(timer, 0, sizeof(*timer)); |
| 1710 | timer->queue = queue->queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1712 | timer->type = tmr->type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1714 | timer->u.alsa.id = tmr->alsa_id; |
| 1715 | timer->u.alsa.resolution = tmr->preferred_resolution; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1717 | mutex_unlock(&queue->timer_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | queuefree(queue); |
| 1719 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | return 0; |
| 1721 | } |
| 1722 | |
| 1723 | |
| 1724 | /* SET_QUEUE_TIMER ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1725 | static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1726 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1728 | struct snd_seq_queue_timer *timer = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1731 | if (timer->type != SNDRV_SEQ_TIMER_ALSA) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | return -EINVAL; |
| 1733 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1734 | if (snd_seq_queue_check_access(timer->queue, client->number)) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1735 | struct snd_seq_queue *q; |
| 1736 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1738 | q = queueptr(timer->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | if (q == NULL) |
| 1740 | return -ENXIO; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1741 | if (mutex_lock_interruptible(&q->timer_mutex)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | queuefree(q); |
| 1743 | return -ERESTARTSYS; |
| 1744 | } |
| 1745 | tmr = q->timer; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1746 | snd_seq_queue_timer_close(timer->queue); |
| 1747 | tmr->type = timer->type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1749 | tmr->alsa_id = timer->u.alsa.id; |
| 1750 | tmr->preferred_resolution = timer->u.alsa.resolution; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | } |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1752 | result = snd_seq_queue_timer_open(timer->queue); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1753 | mutex_unlock(&q->timer_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | queuefree(q); |
| 1755 | } else { |
| 1756 | return -EPERM; |
| 1757 | } |
| 1758 | |
| 1759 | return result; |
| 1760 | } |
| 1761 | |
| 1762 | |
| 1763 | /* GET_QUEUE_CLIENT ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1764 | static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1765 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1767 | struct snd_seq_queue_client *info = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | int used; |
| 1769 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1770 | used = snd_seq_queue_is_used(info->queue, client->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | if (used < 0) |
| 1772 | return -EINVAL; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1773 | info->used = used; |
| 1774 | info->client = client->number; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | return 0; |
| 1777 | } |
| 1778 | |
| 1779 | |
| 1780 | /* SET_QUEUE_CLIENT ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1781 | static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1782 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1784 | struct snd_seq_queue_client *info = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1787 | if (info->used >= 0) { |
| 1788 | err = snd_seq_queue_use(info->queue, client->number, info->used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | if (err < 0) |
| 1790 | return err; |
| 1791 | } |
| 1792 | |
| 1793 | return snd_seq_ioctl_get_queue_client(client, arg); |
| 1794 | } |
| 1795 | |
| 1796 | |
| 1797 | /* GET_CLIENT_POOL ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1798 | static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1799 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1801 | struct snd_seq_client_pool *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1802 | struct snd_seq_client *cptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1804 | cptr = snd_seq_client_use_ptr(info->client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | if (cptr == NULL) |
| 1806 | return -ENOENT; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1807 | memset(info, 0, sizeof(*info)); |
| 1808 | info->client = cptr->number; |
| 1809 | info->output_pool = cptr->pool->size; |
| 1810 | info->output_room = cptr->pool->room; |
| 1811 | info->output_free = info->output_pool; |
| 1812 | info->output_free = snd_seq_unused_cells(cptr->pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | if (cptr->type == USER_CLIENT) { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1814 | info->input_pool = cptr->data.user.fifo_pool_size; |
| 1815 | info->input_free = info->input_pool; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | if (cptr->data.user.fifo) |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1817 | info->input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | } else { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1819 | info->input_pool = 0; |
| 1820 | info->input_free = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | } |
| 1822 | snd_seq_client_unlock(cptr); |
| 1823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | return 0; |
| 1825 | } |
| 1826 | |
| 1827 | /* SET_CLIENT_POOL ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1828 | static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1829 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1831 | struct snd_seq_client_pool *info = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | int rc; |
| 1833 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1834 | if (client->number != info->client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | return -EINVAL; /* can't change other clients */ |
| 1836 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1837 | if (info->output_pool >= 1 && info->output_pool <= SNDRV_SEQ_MAX_EVENTS && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | (! snd_seq_write_pool_allocated(client) || |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1839 | info->output_pool != client->pool->size)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | if (snd_seq_write_pool_allocated(client)) { |
Takashi Iwai | 0d7252d3 | 2018-03-05 22:00:55 +0100 | [diff] [blame] | 1841 | /* is the pool in use? */ |
| 1842 | if (atomic_read(&client->pool->counter)) |
| 1843 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | /* remove all existing cells */ |
Takashi Iwai | ca79952 | 2017-03-21 13:56:04 +0100 | [diff] [blame] | 1845 | snd_seq_pool_mark_closing(client->pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | snd_seq_queue_client_leave_cells(client->number); |
| 1847 | snd_seq_pool_done(client->pool); |
| 1848 | } |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1849 | client->pool->size = info->output_pool; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | rc = snd_seq_pool_init(client->pool); |
| 1851 | if (rc < 0) |
| 1852 | return rc; |
| 1853 | } |
| 1854 | if (client->type == USER_CLIENT && client->data.user.fifo != NULL && |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1855 | info->input_pool >= 1 && |
| 1856 | info->input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && |
| 1857 | info->input_pool != client->data.user.fifo_pool_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | /* change pool size */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1859 | rc = snd_seq_fifo_resize(client->data.user.fifo, info->input_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | if (rc < 0) |
| 1861 | return rc; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1862 | client->data.user.fifo_pool_size = info->input_pool; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | } |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1864 | if (info->output_room >= 1 && |
| 1865 | info->output_room <= client->pool->size) { |
| 1866 | client->pool->room = info->output_room; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | } |
| 1868 | |
| 1869 | return snd_seq_ioctl_get_client_pool(client, arg); |
| 1870 | } |
| 1871 | |
| 1872 | |
| 1873 | /* REMOVE_EVENTS ioctl() */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1874 | static int snd_seq_ioctl_remove_events(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1875 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1877 | struct snd_seq_remove_events *info = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
| 1879 | /* |
| 1880 | * Input mostly not implemented XXX. |
| 1881 | */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1882 | if (info->remove_mode & SNDRV_SEQ_REMOVE_INPUT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | /* |
| 1884 | * No restrictions so for a user client we can clear |
| 1885 | * the whole fifo |
| 1886 | */ |
Takashi Iwai | 030e2c7 | 2016-01-12 12:38:02 +0100 | [diff] [blame] | 1887 | if (client->type == USER_CLIENT && client->data.user.fifo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | snd_seq_fifo_clear(client->data.user.fifo); |
| 1889 | } |
| 1890 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1891 | if (info->remove_mode & SNDRV_SEQ_REMOVE_OUTPUT) |
| 1892 | snd_seq_queue_remove_cells(client->number, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | |
| 1894 | return 0; |
| 1895 | } |
| 1896 | |
| 1897 | |
| 1898 | /* |
| 1899 | * get subscription info |
| 1900 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1901 | static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1902 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1904 | struct snd_seq_port_subscribe *subs = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | int result; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1906 | struct snd_seq_client *sender = NULL; |
| 1907 | struct snd_seq_client_port *sport = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | result = -EINVAL; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1910 | if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | goto __end; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1912 | if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | goto __end; |
Takashi Iwai | 8763ac7 | 2019-04-09 18:04:17 +0200 | [diff] [blame] | 1914 | result = snd_seq_port_get_subscription(&sport->c_src, &subs->dest, |
| 1915 | subs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | __end: |
| 1917 | if (sport) |
| 1918 | snd_seq_port_unlock(sport); |
| 1919 | if (sender) |
| 1920 | snd_seq_client_unlock(sender); |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1921 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | return result; |
| 1923 | } |
| 1924 | |
| 1925 | |
| 1926 | /* |
| 1927 | * get subscription info - check only its presence |
| 1928 | */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1929 | static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1931 | struct snd_seq_query_subs *subs = arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | int result = -ENXIO; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1933 | struct snd_seq_client *cptr = NULL; |
| 1934 | struct snd_seq_client_port *port = NULL; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1935 | struct snd_seq_port_subs_info *group; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | struct list_head *p; |
| 1937 | int i; |
| 1938 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1939 | if ((cptr = snd_seq_client_use_ptr(subs->root.client)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | goto __end; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1941 | if ((port = snd_seq_port_use_ptr(cptr, subs->root.port)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | goto __end; |
| 1943 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1944 | switch (subs->type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | case SNDRV_SEQ_QUERY_SUBS_READ: |
| 1946 | group = &port->c_src; |
| 1947 | break; |
| 1948 | case SNDRV_SEQ_QUERY_SUBS_WRITE: |
| 1949 | group = &port->c_dest; |
| 1950 | break; |
| 1951 | default: |
| 1952 | goto __end; |
| 1953 | } |
| 1954 | |
| 1955 | down_read(&group->list_mutex); |
| 1956 | /* search for the subscriber */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1957 | subs->num_subs = group->count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | i = 0; |
| 1959 | result = -ENOENT; |
| 1960 | list_for_each(p, &group->list_head) { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1961 | if (i++ == subs->index) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | /* found! */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1963 | struct snd_seq_subscribers *s; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1964 | if (subs->type == SNDRV_SEQ_QUERY_SUBS_READ) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1965 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1966 | subs->addr = s->info.dest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | } else { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1968 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1969 | subs->addr = s->info.sender; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | } |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1971 | subs->flags = s->info.flags; |
| 1972 | subs->queue = s->info.queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | result = 0; |
| 1974 | break; |
| 1975 | } |
| 1976 | } |
| 1977 | up_read(&group->list_mutex); |
| 1978 | |
| 1979 | __end: |
| 1980 | if (port) |
| 1981 | snd_seq_port_unlock(port); |
| 1982 | if (cptr) |
| 1983 | snd_seq_client_unlock(cptr); |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1984 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1985 | return result; |
| 1986 | } |
| 1987 | |
| 1988 | |
| 1989 | /* |
| 1990 | * query next client |
| 1991 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1992 | static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1993 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 1995 | struct snd_seq_client_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 1996 | struct snd_seq_client *cptr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | |
| 1998 | /* search for next client */ |
Takashi Iwai | 2f483f9 | 2018-06-25 11:13:59 +0200 | [diff] [blame] | 1999 | if (info->client < INT_MAX) |
| 2000 | info->client++; |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 2001 | if (info->client < 0) |
| 2002 | info->client = 0; |
| 2003 | for (; info->client < SNDRV_SEQ_MAX_CLIENTS; info->client++) { |
| 2004 | cptr = snd_seq_client_use_ptr(info->client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | if (cptr) |
| 2006 | break; /* found */ |
| 2007 | } |
| 2008 | if (cptr == NULL) |
| 2009 | return -ENOENT; |
| 2010 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 2011 | get_client_info(cptr, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2012 | snd_seq_client_unlock(cptr); |
| 2013 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | return 0; |
| 2015 | } |
| 2016 | |
| 2017 | /* |
| 2018 | * query next port |
| 2019 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2020 | static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client, |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 2021 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 2023 | struct snd_seq_port_info *info = arg; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2024 | struct snd_seq_client *cptr; |
| 2025 | struct snd_seq_client_port *port = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 2027 | cptr = snd_seq_client_use_ptr(info->addr.client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | if (cptr == NULL) |
| 2029 | return -ENXIO; |
| 2030 | |
| 2031 | /* search for next port */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 2032 | info->addr.port++; |
| 2033 | port = snd_seq_port_query_nearest(cptr, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | if (port == NULL) { |
| 2035 | snd_seq_client_unlock(cptr); |
| 2036 | return -ENOENT; |
| 2037 | } |
| 2038 | |
| 2039 | /* get port info */ |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 2040 | info->addr = port->addr; |
| 2041 | snd_seq_get_port_info(port, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | snd_seq_port_unlock(port); |
| 2043 | snd_seq_client_unlock(cptr); |
| 2044 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | return 0; |
| 2046 | } |
| 2047 | |
| 2048 | /* -------------------------------------------------------- */ |
| 2049 | |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2050 | static const struct ioctl_handler { |
| 2051 | unsigned int cmd; |
| 2052 | int (*func)(struct snd_seq_client *client, void *arg); |
| 2053 | } ioctl_handlers[] = { |
Takashi Sakamoto | 04a56dd | 2016-08-13 10:13:35 +0900 | [diff] [blame] | 2054 | { SNDRV_SEQ_IOCTL_PVERSION, snd_seq_ioctl_pversion }, |
| 2055 | { SNDRV_SEQ_IOCTL_CLIENT_ID, snd_seq_ioctl_client_id }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info }, |
| 2057 | { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode }, |
| 2058 | { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info }, |
| 2059 | { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info }, |
| 2060 | { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port }, |
| 2061 | { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port }, |
| 2062 | { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info }, |
| 2063 | { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info }, |
| 2064 | { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port }, |
| 2065 | { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port }, |
| 2066 | { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue }, |
| 2067 | { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue }, |
| 2068 | { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info }, |
| 2069 | { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info }, |
| 2070 | { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue }, |
| 2071 | { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status }, |
| 2072 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo }, |
| 2073 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo }, |
| 2074 | { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer }, |
| 2075 | { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer }, |
| 2076 | { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client }, |
| 2077 | { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client }, |
| 2078 | { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool }, |
| 2079 | { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool }, |
| 2080 | { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription }, |
| 2081 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client }, |
| 2082 | { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port }, |
| 2083 | { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events }, |
| 2084 | { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs }, |
| 2085 | { 0, NULL }, |
| 2086 | }; |
| 2087 | |
Takashi Sakamoto | e12ec25 | 2016-08-13 10:13:36 +0900 | [diff] [blame] | 2088 | static long snd_seq_ioctl(struct file *file, unsigned int cmd, |
| 2089 | unsigned long arg) |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2090 | { |
| 2091 | struct snd_seq_client *client = file->private_data; |
| 2092 | /* To use kernel stack for ioctl data. */ |
Takashi Sakamoto | 4127e80 | 2016-08-31 21:02:13 +0900 | [diff] [blame] | 2093 | union { |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2094 | int pversion; |
| 2095 | int client_id; |
| 2096 | struct snd_seq_system_info system_info; |
| 2097 | struct snd_seq_running_info running_info; |
| 2098 | struct snd_seq_client_info client_info; |
| 2099 | struct snd_seq_port_info port_info; |
| 2100 | struct snd_seq_port_subscribe port_subscribe; |
| 2101 | struct snd_seq_queue_info queue_info; |
| 2102 | struct snd_seq_queue_status queue_status; |
| 2103 | struct snd_seq_queue_tempo tempo; |
| 2104 | struct snd_seq_queue_timer queue_timer; |
| 2105 | struct snd_seq_queue_client queue_client; |
| 2106 | struct snd_seq_client_pool client_pool; |
| 2107 | struct snd_seq_remove_events remove_events; |
| 2108 | struct snd_seq_query_subs query_subs; |
Takashi Sakamoto | 4127e80 | 2016-08-31 21:02:13 +0900 | [diff] [blame] | 2109 | } buf; |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2110 | const struct ioctl_handler *handler; |
| 2111 | unsigned long size; |
| 2112 | int err; |
| 2113 | |
| 2114 | if (snd_BUG_ON(!client)) |
| 2115 | return -ENXIO; |
| 2116 | |
| 2117 | for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { |
| 2118 | if (handler->cmd == cmd) |
| 2119 | break; |
| 2120 | } |
| 2121 | if (handler->cmd == 0) |
| 2122 | return -ENOTTY; |
Takashi Sakamoto | 4127e80 | 2016-08-31 21:02:13 +0900 | [diff] [blame] | 2123 | |
| 2124 | memset(&buf, 0, sizeof(buf)); |
| 2125 | |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2126 | /* |
| 2127 | * All of ioctl commands for ALSA sequencer get an argument of size |
| 2128 | * within 13 bits. We can safely pick up the size from the command. |
| 2129 | */ |
| 2130 | size = _IOC_SIZE(handler->cmd); |
Takashi Sakamoto | 69b0582 | 2016-09-13 19:37:53 +0900 | [diff] [blame] | 2131 | if (handler->cmd & IOC_IN) { |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2132 | if (copy_from_user(&buf, (const void __user *)arg, size)) |
| 2133 | return -EFAULT; |
| 2134 | } |
| 2135 | |
Takashi Iwai | e4ff9f2 | 2018-01-09 23:11:03 +0100 | [diff] [blame] | 2136 | mutex_lock(&client->ioctl_mutex); |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2137 | err = handler->func(client, &buf); |
Takashi Iwai | e4ff9f2 | 2018-01-09 23:11:03 +0100 | [diff] [blame] | 2138 | mutex_unlock(&client->ioctl_mutex); |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2139 | if (err >= 0) { |
| 2140 | /* Some commands includes a bug in 'dir' field. */ |
| 2141 | if (handler->cmd == SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT || |
| 2142 | handler->cmd == SNDRV_SEQ_IOCTL_SET_CLIENT_POOL || |
Takashi Sakamoto | 69b0582 | 2016-09-13 19:37:53 +0900 | [diff] [blame] | 2143 | (handler->cmd & IOC_OUT)) |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2144 | if (copy_to_user((void __user *)arg, &buf, size)) |
| 2145 | return -EFAULT; |
| 2146 | } |
| 2147 | |
| 2148 | return err; |
| 2149 | } |
| 2150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2151 | #ifdef CONFIG_COMPAT |
| 2152 | #include "seq_compat.c" |
| 2153 | #else |
| 2154 | #define snd_seq_ioctl_compat NULL |
| 2155 | #endif |
| 2156 | |
| 2157 | /* -------------------------------------------------------- */ |
| 2158 | |
| 2159 | |
| 2160 | /* exported to kernel modules */ |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 2161 | int snd_seq_create_kernel_client(struct snd_card *card, int client_index, |
| 2162 | const char *name_fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2164 | struct snd_seq_client *client; |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 2165 | va_list args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2166 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2167 | if (snd_BUG_ON(in_interrupt())) |
| 2168 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 2170 | if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | return -EINVAL; |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 2172 | if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2175 | if (mutex_lock_interruptible(®ister_mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | return -ERESTARTSYS; |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 2177 | |
| 2178 | if (card) { |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 2179 | client_index += SNDRV_SEQ_GLOBAL_CLIENTS |
| 2180 | + card->number * SNDRV_SEQ_CLIENTS_PER_CARD; |
| 2181 | if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) |
Clemens Ladisch | d001544 | 2005-11-20 14:09:05 +0100 | [diff] [blame] | 2182 | client_index = -1; |
| 2183 | } |
| 2184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | /* empty write queue as default */ |
Clemens Ladisch | aa1e77e | 2005-12-12 09:36:01 +0100 | [diff] [blame] | 2186 | client = seq_create_client1(client_index, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | if (client == NULL) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2188 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | return -EBUSY; /* failure code */ |
| 2190 | } |
| 2191 | usage_alloc(&client_usage, 1); |
| 2192 | |
Clemens Ladisch | 83e8ad6 | 2005-12-12 09:30:43 +0100 | [diff] [blame] | 2193 | client->accept_input = 1; |
| 2194 | client->accept_output = 1; |
Martin Koegler | a1ce94d | 2016-03-02 19:26:28 +0100 | [diff] [blame] | 2195 | client->data.kernel.card = card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 2197 | va_start(args, name_fmt); |
| 2198 | vsnprintf(client->name, sizeof(client->name), name_fmt, args); |
| 2199 | va_end(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | |
| 2201 | client->type = KERNEL_CLIENT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2202 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | |
| 2204 | /* make others aware this new client */ |
| 2205 | snd_seq_system_client_ev_client_start(client->number); |
| 2206 | |
| 2207 | /* return client number to caller */ |
| 2208 | return client->number; |
| 2209 | } |
| 2210 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2211 | EXPORT_SYMBOL(snd_seq_create_kernel_client); |
| 2212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2213 | /* exported to kernel modules */ |
| 2214 | int snd_seq_delete_kernel_client(int client) |
| 2215 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2216 | struct snd_seq_client *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2217 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2218 | if (snd_BUG_ON(in_interrupt())) |
| 2219 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | |
| 2221 | ptr = clientptr(client); |
| 2222 | if (ptr == NULL) |
| 2223 | return -EINVAL; |
| 2224 | |
| 2225 | seq_free_client(ptr); |
| 2226 | kfree(ptr); |
| 2227 | return 0; |
| 2228 | } |
| 2229 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2230 | EXPORT_SYMBOL(snd_seq_delete_kernel_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | |
| 2232 | /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue |
| 2233 | * and snd_seq_kernel_client_enqueue_blocking |
| 2234 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2235 | static int kernel_client_enqueue(int client, struct snd_seq_event *ev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | struct file *file, int blocking, |
| 2237 | int atomic, int hop) |
| 2238 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2239 | struct snd_seq_client *cptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | int result; |
| 2241 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2242 | if (snd_BUG_ON(!ev)) |
| 2243 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2244 | |
| 2245 | if (ev->type == SNDRV_SEQ_EVENT_NONE) |
| 2246 | return 0; /* ignore this */ |
| 2247 | if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR) |
| 2248 | return -EINVAL; /* quoted events can't be enqueued */ |
| 2249 | |
| 2250 | /* fill in client number */ |
| 2251 | ev->source.client = client; |
| 2252 | |
| 2253 | if (check_event_type_and_length(ev)) |
| 2254 | return -EINVAL; |
| 2255 | |
| 2256 | cptr = snd_seq_client_use_ptr(client); |
| 2257 | if (cptr == NULL) |
| 2258 | return -EINVAL; |
| 2259 | |
| 2260 | if (! cptr->accept_output) |
| 2261 | result = -EPERM; |
| 2262 | else /* send it */ |
Takashi Iwai | ec00116 | 2018-03-05 22:06:09 +0100 | [diff] [blame] | 2263 | result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, |
| 2264 | atomic, hop, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | |
| 2266 | snd_seq_client_unlock(cptr); |
| 2267 | return result; |
| 2268 | } |
| 2269 | |
| 2270 | /* |
| 2271 | * exported, called by kernel clients to enqueue events (w/o blocking) |
| 2272 | * |
| 2273 | * RETURN VALUE: zero if succeed, negative if error |
| 2274 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2275 | int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | int atomic, int hop) |
| 2277 | { |
| 2278 | return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop); |
| 2279 | } |
| 2280 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2281 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue); |
| 2282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | /* |
| 2284 | * exported, called by kernel clients to enqueue events (with blocking) |
| 2285 | * |
| 2286 | * RETURN VALUE: zero if succeed, negative if error |
| 2287 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2288 | int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | struct file *file, |
| 2290 | int atomic, int hop) |
| 2291 | { |
| 2292 | return kernel_client_enqueue(client, ev, file, 1, atomic, hop); |
| 2293 | } |
| 2294 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2295 | EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2296 | |
| 2297 | /* |
| 2298 | * exported, called by kernel clients to dispatch events directly to other |
| 2299 | * clients, bypassing the queues. Event time-stamp will be updated. |
| 2300 | * |
| 2301 | * RETURN VALUE: negative = delivery failed, |
| 2302 | * zero, or positive: the number of delivered events |
| 2303 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2304 | int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | int atomic, int hop) |
| 2306 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2307 | struct snd_seq_client *cptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | int result; |
| 2309 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2310 | if (snd_BUG_ON(!ev)) |
| 2311 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | |
| 2313 | /* fill in client number */ |
| 2314 | ev->queue = SNDRV_SEQ_QUEUE_DIRECT; |
| 2315 | ev->source.client = client; |
| 2316 | |
| 2317 | if (check_event_type_and_length(ev)) |
| 2318 | return -EINVAL; |
| 2319 | |
| 2320 | cptr = snd_seq_client_use_ptr(client); |
| 2321 | if (cptr == NULL) |
| 2322 | return -EINVAL; |
| 2323 | |
| 2324 | if (!cptr->accept_output) |
| 2325 | result = -EPERM; |
| 2326 | else |
| 2327 | result = snd_seq_deliver_event(cptr, ev, atomic, hop); |
| 2328 | |
| 2329 | snd_seq_client_unlock(cptr); |
| 2330 | return result; |
| 2331 | } |
| 2332 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2333 | EXPORT_SYMBOL(snd_seq_kernel_client_dispatch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | |
Takashi Sakamoto | 77dfa8d | 2016-08-13 10:13:33 +0900 | [diff] [blame] | 2335 | /** |
| 2336 | * snd_seq_kernel_client_ctl - operate a command for a client with data in |
| 2337 | * kernel space. |
| 2338 | * @clientid: A numerical ID for a client. |
| 2339 | * @cmd: An ioctl(2) command for ALSA sequencer operation. |
| 2340 | * @arg: A pointer to data in kernel space. |
| 2341 | * |
| 2342 | * Against its name, both kernel/application client can be handled by this |
| 2343 | * kernel API. A pointer of 'arg' argument should be in kernel space. |
| 2344 | * |
| 2345 | * Return: 0 at success. Negative error code at failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | */ |
| 2347 | int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) |
| 2348 | { |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2349 | const struct ioctl_handler *handler; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2350 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | |
| 2352 | client = clientptr(clientid); |
| 2353 | if (client == NULL) |
| 2354 | return -ENXIO; |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2355 | |
| 2356 | for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { |
Takashi Iwai | 881a09f | 2019-04-11 19:58:32 +0200 | [diff] [blame] | 2357 | if (handler->cmd == cmd) |
| 2358 | return handler->func(client, arg); |
Takashi Sakamoto | 8ce8eb6 | 2016-08-13 10:13:34 +0900 | [diff] [blame] | 2359 | } |
| 2360 | |
Takashi Sakamoto | e12ec25 | 2016-08-13 10:13:36 +0900 | [diff] [blame] | 2361 | pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n", |
| 2362 | cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); |
| 2363 | return -ENOTTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | } |
| 2365 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2366 | EXPORT_SYMBOL(snd_seq_kernel_client_ctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | |
| 2368 | /* exported (for OSS emulator) */ |
| 2369 | int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait) |
| 2370 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2371 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2372 | |
| 2373 | client = clientptr(clientid); |
| 2374 | if (client == NULL) |
| 2375 | return -ENXIO; |
| 2376 | |
| 2377 | if (! snd_seq_write_pool_allocated(client)) |
| 2378 | return 1; |
| 2379 | if (snd_seq_pool_poll_wait(client->pool, file, wait)) |
| 2380 | return 1; |
| 2381 | return 0; |
| 2382 | } |
| 2383 | |
Takashi Iwai | 91715ed | 2006-04-28 15:13:39 +0200 | [diff] [blame] | 2384 | EXPORT_SYMBOL(snd_seq_kernel_client_write_poll); |
| 2385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | /*---------------------------------------------------------------------------*/ |
| 2387 | |
Jie Yang | cd6a650 | 2015-05-27 19:45:45 +0800 | [diff] [blame] | 2388 | #ifdef CONFIG_SND_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2389 | /* |
| 2390 | * /proc interface |
| 2391 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2392 | static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, |
| 2393 | struct snd_seq_port_subs_info *group, |
| 2394 | int is_src, char *msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | { |
| 2396 | struct list_head *p; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2397 | struct snd_seq_subscribers *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2398 | int count = 0; |
| 2399 | |
| 2400 | down_read(&group->list_mutex); |
| 2401 | if (list_empty(&group->list_head)) { |
| 2402 | up_read(&group->list_mutex); |
| 2403 | return; |
| 2404 | } |
| 2405 | snd_iprintf(buffer, msg); |
| 2406 | list_for_each(p, &group->list_head) { |
| 2407 | if (is_src) |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2408 | s = list_entry(p, struct snd_seq_subscribers, src_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | else |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2410 | s = list_entry(p, struct snd_seq_subscribers, dest_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | if (count++) |
| 2412 | snd_iprintf(buffer, ", "); |
| 2413 | snd_iprintf(buffer, "%d:%d", |
| 2414 | is_src ? s->info.dest.client : s->info.sender.client, |
| 2415 | is_src ? s->info.dest.port : s->info.sender.port); |
| 2416 | if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) |
| 2417 | snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue); |
| 2418 | if (group->exclusive) |
| 2419 | snd_iprintf(buffer, "[ex]"); |
| 2420 | } |
| 2421 | up_read(&group->list_mutex); |
| 2422 | snd_iprintf(buffer, "\n"); |
| 2423 | } |
| 2424 | |
| 2425 | #define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-') |
| 2426 | #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-') |
| 2427 | #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e') |
| 2428 | |
| 2429 | #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-') |
| 2430 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2431 | static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, |
| 2432 | struct snd_seq_client *client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2433 | { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 2434 | struct snd_seq_client_port *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2436 | mutex_lock(&client->ports_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 2437 | list_for_each_entry(p, &client->ports_list_head, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", |
| 2439 | p->addr.port, p->name, |
| 2440 | FLAG_PERM_RD(p->capability), |
| 2441 | FLAG_PERM_WR(p->capability), |
| 2442 | FLAG_PERM_EX(p->capability), |
| 2443 | FLAG_PERM_DUPLEX(p->capability)); |
| 2444 | snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); |
| 2445 | snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); |
| 2446 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2447 | mutex_unlock(&client->ports_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | } |
| 2449 | |
| 2450 | |
| 2451 | /* exported to seq_info.c */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2452 | void snd_seq_info_clients_read(struct snd_info_entry *entry, |
| 2453 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2454 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2455 | int c; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 2456 | struct snd_seq_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2457 | |
| 2458 | snd_iprintf(buffer, "Client info\n"); |
| 2459 | snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur); |
| 2460 | snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak); |
| 2461 | snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS); |
| 2462 | snd_iprintf(buffer, "\n"); |
| 2463 | |
| 2464 | /* list the client table */ |
| 2465 | for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) { |
| 2466 | client = snd_seq_client_use_ptr(c); |
| 2467 | if (client == NULL) |
| 2468 | continue; |
| 2469 | if (client->type == NO_CLIENT) { |
| 2470 | snd_seq_client_unlock(client); |
| 2471 | continue; |
| 2472 | } |
| 2473 | |
| 2474 | snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n", |
| 2475 | c, client->name, |
| 2476 | client->type == USER_CLIENT ? "User" : "Kernel"); |
| 2477 | snd_seq_info_dump_ports(buffer, client); |
| 2478 | if (snd_seq_write_pool_allocated(client)) { |
| 2479 | snd_iprintf(buffer, " Output pool :\n"); |
| 2480 | snd_seq_info_pool(buffer, client->pool, " "); |
| 2481 | } |
| 2482 | if (client->type == USER_CLIENT && client->data.user.fifo && |
| 2483 | client->data.user.fifo->pool) { |
| 2484 | snd_iprintf(buffer, " Input pool :\n"); |
| 2485 | snd_seq_info_pool(buffer, client->data.user.fifo->pool, " "); |
| 2486 | } |
| 2487 | snd_seq_client_unlock(client); |
| 2488 | } |
| 2489 | } |
Jie Yang | cd6a650 | 2015-05-27 19:45:45 +0800 | [diff] [blame] | 2490 | #endif /* CONFIG_SND_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2491 | |
| 2492 | /*---------------------------------------------------------------------------*/ |
| 2493 | |
| 2494 | |
| 2495 | /* |
| 2496 | * REGISTRATION PART |
| 2497 | */ |
| 2498 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 2499 | static const struct file_operations snd_seq_f_ops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2500 | { |
| 2501 | .owner = THIS_MODULE, |
| 2502 | .read = snd_seq_read, |
| 2503 | .write = snd_seq_write, |
| 2504 | .open = snd_seq_open, |
| 2505 | .release = snd_seq_release, |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 2506 | .llseek = no_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | .poll = snd_seq_poll, |
| 2508 | .unlocked_ioctl = snd_seq_ioctl, |
| 2509 | .compat_ioctl = snd_seq_ioctl_compat, |
| 2510 | }; |
| 2511 | |
Takashi Iwai | 5205388 | 2015-01-30 08:04:21 +0100 | [diff] [blame] | 2512 | static struct device seq_dev; |
| 2513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | /* |
| 2515 | * register sequencer device |
| 2516 | */ |
| 2517 | int __init snd_sequencer_device_init(void) |
| 2518 | { |
| 2519 | int err; |
| 2520 | |
Takashi Iwai | 5205388 | 2015-01-30 08:04:21 +0100 | [diff] [blame] | 2521 | snd_device_initialize(&seq_dev, NULL); |
| 2522 | dev_set_name(&seq_dev, "seq"); |
| 2523 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2524 | if (mutex_lock_interruptible(®ister_mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2525 | return -ERESTARTSYS; |
| 2526 | |
Takashi Iwai | 40a4b26 | 2015-01-30 08:34:58 +0100 | [diff] [blame] | 2527 | err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, |
| 2528 | &snd_seq_f_ops, NULL, &seq_dev); |
Takashi Iwai | 5205388 | 2015-01-30 08:04:21 +0100 | [diff] [blame] | 2529 | if (err < 0) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2530 | mutex_unlock(®ister_mutex); |
Takashi Iwai | 5205388 | 2015-01-30 08:04:21 +0100 | [diff] [blame] | 2531 | put_device(&seq_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2532 | return err; |
| 2533 | } |
| 2534 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2535 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | |
| 2537 | return 0; |
| 2538 | } |
| 2539 | |
| 2540 | |
| 2541 | |
| 2542 | /* |
| 2543 | * unregister sequencer device |
| 2544 | */ |
| 2545 | void __exit snd_sequencer_device_done(void) |
| 2546 | { |
Takashi Iwai | 40a4b26 | 2015-01-30 08:34:58 +0100 | [diff] [blame] | 2547 | snd_unregister_device(&seq_dev); |
Takashi Iwai | 5205388 | 2015-01-30 08:04:21 +0100 | [diff] [blame] | 2548 | put_device(&seq_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2549 | } |