cregit-Linux how code gets into the kernel

Release 4.11 sound/core/seq/seq_clientmgr.c

Directory: sound/core/seq
/*
 *  ALSA sequencer Client Manager
 *  Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl>
 *                             Jaroslav Kysela <perex@perex.cz>
 *                             Takashi Iwai <tiwai@suse.de>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/init.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <linux/kmod.h>

#include <sound/seq_kernel.h>
#include "seq_clientmgr.h"
#include "seq_memory.h"
#include "seq_queue.h"
#include "seq_timer.h"
#include "seq_info.h"
#include "seq_system.h"
#include <sound/seq_device.h>
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
#endif

/* Client Manager

 * this module handles the connections of userland and kernel clients
 * 
 */

/*
 * There are four ranges of client numbers (last two shared):
 * 0..15: global clients
 * 16..127: statically allocated client numbers for cards 0..27
 * 128..191: dynamically allocated client numbers for cards 28..31
 * 128..191: dynamically allocated client numbers for applications
 */

/* number of kernel non-card clients */

#define SNDRV_SEQ_GLOBAL_CLIENTS	16
/* clients per cards, for static clients */

#define SNDRV_SEQ_CLIENTS_PER_CARD	4
/* dynamically allocated client numbers (both kernel drivers and user space) */

#define SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN	128


#define SNDRV_SEQ_LFLG_INPUT	0x0001

#define SNDRV_SEQ_LFLG_OUTPUT	0x0002

#define SNDRV_SEQ_LFLG_OPEN	(SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT)

static DEFINE_SPINLOCK(clients_lock);
static DEFINE_MUTEX(register_mutex);

/*
 * client table
 */

static char clienttablock[SNDRV_SEQ_MAX_CLIENTS];

static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS];

static struct snd_seq_usage client_usage;

/*
 * prototypes
 */
static int bounce_error_event(struct snd_seq_client *client,
			      struct snd_seq_event *event,
			      int err, int atomic, int hop);
static int snd_seq_deliver_single_event(struct snd_seq_client *client,
					struct snd_seq_event *event,
					int filter, int atomic, int hop);

/*
 */

static inline unsigned short snd_seq_file_flags(struct file *file) { switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { case FMODE_WRITE: return SNDRV_SEQ_LFLG_OUTPUT; case FMODE_READ: return SNDRV_SEQ_LFLG_INPUT; default: return SNDRV_SEQ_LFLG_OPEN; } }

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static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client) { return snd_seq_total_cells(client->pool) > 0; }

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Jaroslav Kysela2090.91%150.00%
Takashi Iwai29.09%150.00%
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/* return pointer to client structure for specified id */
static struct snd_seq_client *clientptr(int clientid) { if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n", clientid); return NULL; } return clienttab[clientid]; }

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Jaroslav Kysela3589.74%133.33%
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struct snd_seq_client *snd_seq_client_use_ptr(int clientid) { unsigned long flags; struct snd_seq_client *client; if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) { pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n", clientid); return NULL; } spin_lock_irqsave(&clients_lock, flags); client = clientptr(clientid); if (client) goto __lock; if (clienttablock[clientid]) { spin_unlock_irqrestore(&clients_lock, flags); return NULL; } spin_unlock_irqrestore(&clients_lock, flags); #ifdef CONFIG_MODULES if (!in_interrupt()) { static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS]; static char card_requested[SNDRV_CARDS]; if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) { int idx; if (!client_requested[clientid]) { client_requested[clientid] = 1; for (idx = 0; idx < 15; idx++) { if (seq_client_load[idx] < 0) break; if (seq_client_load[idx] == clientid) { request_module("snd-seq-client-%i", clientid); break; } } } } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) { int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) / SNDRV_SEQ_CLIENTS_PER_CARD; if (card < snd_ecards_limit) { if (! card_requested[card]) { card_requested[card] = 1; snd_request_card(card); } snd_seq_device_load_drivers(); } } spin_lock_irqsave(&clients_lock, flags); client = clientptr(clientid); if (client) goto __lock; spin_unlock_irqrestore(&clients_lock, flags); } #endif return NULL; __lock: snd_use_lock_use(&client->use_lock); spin_unlock_irqrestore(&clients_lock, flags); return client; }

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Johannes Berg10.34%110.00%
Linus Torvalds10.34%110.00%
Total297100.00%10100.00%


static void usage_alloc(struct snd_seq_usage *res, int num) { res->cur += num; if (res->cur > res->peak) res->peak = res->cur; }

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static void usage_free(struct snd_seq_usage *res, int num) { res->cur -= num; }

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Jaroslav Kysela1890.00%150.00%
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/* initialise data structures */
int __init client_init_data(void) { /* zap out the client table */ memset(&clienttablock, 0, sizeof(clienttablock)); memset(&clienttab, 0, sizeof(clienttab)); return 0; }

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static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) { unsigned long flags; int c; struct snd_seq_client *client; /* init client data */ client = kzalloc(sizeof(*client), GFP_KERNEL); if (client == NULL) return NULL; client->pool = snd_seq_pool_new(poolsize); if (client->pool == NULL) { kfree(client); return NULL; } client->type = NO_CLIENT; snd_use_lock_init(&client->use_lock); rwlock_init(&client->ports_lock); mutex_init(&client->ports_mutex); INIT_LIST_HEAD(&client->ports_list_head); /* find free slot in the client table */ spin_lock_irqsave(&clients_lock, flags); if (client_index < 0) { for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN; c < SNDRV_SEQ_MAX_CLIENTS; c++) { if (clienttab[c] || clienttablock[c]) continue; clienttab[client->number = c] = client; spin_unlock_irqrestore(&clients_lock, flags); return client; } } else { if (clienttab[client_index] == NULL && !clienttablock[client_index]) { clienttab[client->number = client_index] = client; spin_unlock_irqrestore(&clients_lock, flags); return client; } } spin_unlock_irqrestore(&clients_lock, flags); snd_seq_pool_delete(&client->pool); kfree(client); return NULL; /* no free slot found or busy, return failure code */ }

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Total248100.00%6100.00%


static int seq_free_client1(struct snd_seq_client *client) { unsigned long flags; if (!client) return 0; snd_seq_delete_all_ports(client); snd_seq_queue_client_leave(client->number); spin_lock_irqsave(&clients_lock, flags); clienttablock[client->number] = 1; clienttab[client->number] = NULL; spin_unlock_irqrestore(&clients_lock, flags); snd_use_lock_sync(&client->use_lock); snd_seq_queue_client_termination(client->number); if (client->pool) snd_seq_pool_delete(&client->pool); spin_lock_irqsave(&clients_lock, flags); clienttablock[client->number] = 0; spin_unlock_irqrestore(&clients_lock, flags); return 0; }

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Jaroslav Kysela11692.06%133.33%
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static void seq_free_client(struct snd_seq_client * client) { mutex_lock(&register_mutex); switch (client->type) { case NO_CLIENT: pr_warn("ALSA: seq: Trying to free unused client %d\n", client->number); break; case USER_CLIENT: case KERNEL_CLIENT: seq_free_client1(client); usage_free(&client_usage, 1); break; default: pr_err("ALSA: seq: Trying to free client %d with undefined type = %d\n", client->number, client->type); } mutex_unlock(&register_mutex); snd_seq_system_client_ev_client_exit(client->number); }

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/* -------------------------------------------------------- */ /* create a user client */
static int snd_seq_open(struct inode *inode, struct file *file) { int c, mode; /* client id */ struct snd_seq_client *client; struct snd_seq_user_client *user; int err; err = nonseekable_open(inode, file); if (err < 0) return err; if (mutex_lock_interruptible(&register_mutex)) return -ERESTARTSYS; client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS); if (client == NULL) { mutex_unlock(&register_mutex); return -ENOMEM; /* failure code */ } mode = snd_seq_file_flags(file); if (mode & SNDRV_SEQ_LFLG_INPUT) client->accept_input = 1; if (mode & SNDRV_SEQ_LFLG_OUTPUT) client->accept_output = 1; user = &client->data.user; user->fifo = NULL; user->fifo_pool_size = 0; if (mode & SNDRV_SEQ_LFLG_INPUT) { user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS; user->fifo = snd_seq_fifo_new(user->fifo_pool_size); if (user->fifo == NULL) { seq_free_client1(client); kfree(client); mutex_unlock(&register_mutex); return -ENOMEM; } } usage_alloc(&client_usage, 1); client->type = USER_CLIENT; mutex_unlock(&register_mutex); c = client->number; file->private_data = client; /* fill client data */ user->file = file; sprintf(client->name, "Client-%d", c); client->data.user.owner = get_pid(task_pid(current)); /* make others aware this new client */ snd_seq_system_client_ev_client_start(c); return 0; }

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Martin Koegler165.80%120.00%
Ingo Molnar41.45%120.00%
Total276100.00%5100.00%

/* delete a user client */
static int snd_seq_release(struct inode *inode, struct file *file) { struct snd_seq_client *client = file->private_data; if (client) { seq_free_client(client); if (client->data.user.fifo) snd_seq_fifo_delete(&client->data.user.fifo); put_pid(client->data.user.owner); kfree(client); } return 0; }

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/* handle client read() */ /* possible error values: * -ENXIO invalid client or file open mode * -ENOSPC FIFO overflow (the flag is cleared after this error report) * -EINVAL no enough user-space buffer to write the whole event * -EFAULT seg. fault during copy to user space */
static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count, loff_t *offset) { struct snd_seq_client *client = file->private_data; struct snd_seq_fifo *fifo; int err; long result = 0; struct snd_seq_event_cell *cell; if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT)) return -ENXIO; if (!access_ok(VERIFY_WRITE, buf, count)) return -EFAULT; /* check client structures are in place */ if (snd_BUG_ON(!client)) return -ENXIO; if (!client->accept_input || (fifo = client->data.user.fifo) == NULL) return -ENXIO; if (atomic_read(&fifo->overflow) > 0) { /* buffer overflow is detected */ snd_seq_fifo_clear(fifo); /* return error code */ return -ENOSPC; } cell = NULL; err = 0; snd_seq_fifo_lock(fifo); /* while data available in queue */ while (count >= sizeof(struct snd_seq_event)) { int nonblock; nonblock = (file->f_flags & O_NONBLOCK) || result > 0; if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) { break; } if (snd_seq_ev_is_variable(&cell->event)) { struct snd_seq_event tmpev; tmpev = cell->event; tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK; if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) { err = -EFAULT; break; } count -= sizeof(struct snd_seq_event); buf += sizeof(struct snd_seq_event); err = snd_seq_expand_var_event(&cell->event, count, (char __force *)buf, 0, sizeof(struct snd_seq_event)); if (err < 0) break; result += err; count -= err; buf += err; } else { if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) { err = -EFAULT; break; } count -= sizeof(struct snd_seq_event); buf += sizeof(struct snd_seq_event); } snd_seq_cell_free(cell); cell = NULL; /* to be sure */ result += sizeof(struct snd_seq_event); } if (err < 0) { if (cell) snd_seq_fifo_cell_putback(fifo, cell); if (err == -EAGAIN && result > 0) err = 0; } snd_seq_fifo_unlock(fifo); return (err < 0) ? err : result; }

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Jaroslav Kysela40190.93%337.50%
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Clemens Ladisch10.23%112.50%
Total441100.00%8100.00%

/* * check access permission to the port */
static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags) { if ((port->capability & flags) != flags) return 0; return flags; }

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/* * check if the destination client is available, and return the pointer * if filter is non-zero, client filter bitmap is tested. */
static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event, int filter) { struct snd_seq_client *dest; dest = snd_seq_client_use_ptr(event->dest.client); if (dest == NULL) return NULL; if (! dest->accept_input) goto __not_avail; if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) && ! test_bit(event->type, dest->event_filter)) goto __not_avail; if (filter && !(dest->filter & filter)) goto __not_avail; return dest; /* ok - accessible */ __not_avail: snd_seq_client_unlock(dest); return NULL; }

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Jaroslav Kysela10094.34%150.00%
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/* * Return the error event. * * If the receiver client is a user client, the original event is * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If * the original event is also variable length, the external data is * copied after the event record. * If the receiver client is a kernel client, the original event is * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra * kmalloc. */
static int bounce_error_event(struct snd_seq_client *client, struct snd_seq_event *event, int err, int atomic, int hop) { struct snd_seq_event bounce_ev; int result; if (client == NULL || ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) || ! client->accept_input) return 0; /* ignored */ /* set up quoted error */ memset(&bounce_ev, 0, sizeof(bounce_ev)); bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR; bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED; bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT; bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE; bounce_ev.dest.client = client->number; bounce_ev.dest.port = event->source.port; bounce_ev.data.quote.origin = event->dest; bounce_ev.data.quote.event = event; bounce_ev.data.quote.value = -err; /* use positive value */ result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1); if (result < 0) { client->event_lost++; return result; } return result; }

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/* * rewrite the time-stamp of the event record with the curren time * of the given queue. * return non-zero if updated. */
static int update_timestamp_of_queue(struct snd_seq_event *event, int queue, int real_time) { struct snd_seq_queue *q; q = queueptr(queue); if (! q) return 0; event->queue = queue; event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK; if (real_time) { event->time.time = snd_seq_timer_get_cur_time(q->timer); event->flags |= SNDRV_SEQ_TIME_STAMP_REAL; } else { event->time.tick = snd_seq_timer_get_cur_tick(q->timer); event->flags |= SNDRV_SEQ_TIME_STAMP_TICK; } queuefree(q); return 1; }

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/* * deliver an event to the specified destination. * if filter is non-zero, client filter bitmap is tested. * * RETURN VALUE: 0 : if succeeded * <0 : error */
static int snd_seq_deliver_single_event(struct snd_seq_client *client, struct snd_seq_event *event, int filter, int atomic, int hop) { struct snd_seq_client *dest = NULL; struct snd_seq_client_port *dest_port = NULL; int result = -ENOENT; int direct; direct = snd_seq_ev_is_direct(event); dest = get_event_dest_client(event, filter); if (dest == NULL) goto __skip; dest_port = snd_seq_port_use_ptr(dest, event->dest.port); if (dest_port == NULL) goto __skip; /* check permission */ if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) { result = -EPERM; goto __skip; } if (dest_port->timestamping) update_timestamp_of_queue(event, dest_port->time_queue, dest_port->time_real); switch (dest->type) { case USER_CLIENT: if (dest->data.user.fifo) result = snd_seq_fifo_event_in(dest->data.user.fifo, event); break; case KERNEL_CLIENT: if (dest_port->event_input == NULL) break; result = dest_port->event_input(event, direct, dest_port->private_data, atomic, hop); break; default: break; } __skip: if (dest_port) snd_seq_port_unlock(dest_port); if (dest) snd_seq_client_unlock(dest); if (result < 0 && !direct) { result = bounce_error_event(client, event, result, atomic, hop); } return result; }

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/* * send the event to all subscribers: */
static int deliver_to_subscribers(struct snd_seq_client *client, struct snd_seq_event *event, int atomic, int hop) { struct snd_seq_subscribers *subs; int err, result = 0, num_ev = 0; struct snd_seq_event event_saved; struct snd_seq_client_port *src_port; struct snd_seq_port_subs_info *grp; src_port = snd_seq_port_use_ptr(client, event->source.port); if (src_port == NULL) return -EINVAL; /* invalid source port */ /* save original event record */ event_saved = *event; grp = &src_port->c_src; /* lock list */ if (atomic) read_lock(&grp->list_lock); else down_read(&grp->list_mutex); list_for_each_entry(subs, &grp->list_head, src_list) { /* both ports ready? */ if (atomic_read(&subs->ref_count) != 2) continue; event->dest = subs->info.dest; if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) /* convert time according to flag with subscription */ update_timestamp_of_queue(event, subs->info.queue, subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL); err = snd_seq_deliver_single_event(client, event, 0, atomic, hop); if (err < 0) { /* save first error that occurs and continue */ if (!result) result = err; continue; } num_ev++; /* restore original event record */ *event = event_saved; } if (atomic) read_unlock(&grp->list_lock); else up_read(&grp->list_mutex); *event = event_saved; /* restore */ snd_seq_port_unlock(src_port); return (result < 0) ? result : num_ev; }

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Total261100.00%6100.00%

#ifdef SUPPORT_BROADCAST /* * broadcast to all ports: */
static int port_broadcast_event(struct snd_seq_client *client, struct snd_seq_event *event, int atomic, int hop) { int num_ev = 0, err, result = 0; struct snd_seq_client *dest_client; struct snd_seq_client_port *port; dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST); if (dest_client == NULL) return 0; /* no matching destination */ read_lock(&dest_client->ports_lock); list_for_each_entry(port, &dest_client->ports_list_head, list) { event->dest.port = port->addr.port; /* pass NULL as source client to avoid error bounce */ err = snd_seq_deliver_single_event(NULL, event, SNDRV_SEQ_FILTER_BROADCAST, atomic, hop); if (err < 0) { /* save first error that occurs and continue */ if (!result) result = err; continue; } num_ev++; } read_unlock(&dest_client->ports_lock); snd_seq_client_unlock(dest_client); event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */ return (result < 0) ? result : num_ev; }

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Jaroslav Kysela13482.21%240.00%
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Johannes Berg63.68%120.00%
Total163100.00%5100.00%

/* * send the event to all clients: * if destination port is also ADDRESS_BROADCAST, deliver to all ports. */
static int broadcast_event(struct snd_seq_client *client, struct snd_seq_event *event, int atomic, int hop) { int err, result = 0, num_ev = 0; int dest; struct snd_seq_addr addr; addr = event->dest; /* save */ for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) { /* don't send to itself */ if (dest == client->number) continue; event->dest.client = dest; event->dest.port = addr.port; if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST) err = port_broadcast_event(client, event, atomic, hop); else /* pass NULL as source client to avoid error bounce */ err = snd_seq_deliver_single_event(NULL, event, SNDRV_SEQ_FILTER_BROADCAST, atomic, hop); if (err < 0) { /* save first error that occurs and continue */ if (!result) result = err; continue; } num_ev += err; } event->dest = addr; /* restore */ return (result < 0) ? result : num_ev; }

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/* multicast - not supported yet */
static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event, int atomic, int hop) { pr_debug("ALSA: seq: multicast not supported yet.\n"); return 0; /* ignored */ }

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Total31100.00%3100.00%

#endif /* SUPPORT_BROADCAST */ /* deliver an event to the destination port(s). * if the event is to subscribers or broadcast, the event is dispatched * to multiple targets. * * RETURN VALUE: n > 0 : the number of delivered events. * n == 0 : the event was not passed to any client. * n < 0 : error - event was not processed. */
static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event, int atomic, int hop) { int result; hop++; if (hop >= SNDRV_SEQ_MAX_HOPS) { pr_debug("ALSA: seq: too long delivery path (%d:%d->%d:%d)\n", event->source.client, event->source.port, event->dest.client, event->dest.port); return -EMLINK; } if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS || event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) result = deliver_to_subscribers(client, event, atomic, hop); #ifdef SUPPORT_BROADCAST else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST || event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST) result = broadcast_event(client, event, atomic, hop); else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS) result = multicast_event(client, event, atomic, hop); else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST) result = port_broadcast_event(client, event, atomic, hop); #endif else result = snd_seq_deliver_single_event(client, event, 0, atomic, hop); return result; }

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Jaroslav Kysela19497.00%250.00%
Takashi Iwai63.00%250.00%
Total200100.00%4100.00%

/* * dispatch an event cell: * This function is called only from queue check routines in timer * interrupts or after enqueued. * The event cell shall be released or re-queued in this function. * * RETURN VALUE: n > 0 : the number of delivered events. * n == 0 : the event was not passed to any client. * n < 0 : error - event was not processed. */
int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop) { struct snd_seq_client *client; int result; if (snd_BUG_ON(!cell)) return -EINVAL; client = snd_seq_client_use_ptr(cell->event.source.client); if (client == NULL) { snd_seq_cell_free(cell); /* release this cell */ return -EINVAL; } if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) { /* NOTE event: * the event cell is re-used as a NOTE-OFF event and * enqueued again. */ struct snd_seq_event tmpev, *ev; /* reserve this event to enqueue note-off later */ tmpev = cell->event; tmpev.type = SNDRV_SEQ_EVENT_NOTEON; result = snd_seq_deliver_event(client, &tmpev, atomic, hop); /* * This was originally a note event. We now re-use the * cell for the note-off event. */ ev = &cell->event; ev->type = SNDRV_SEQ_EVENT_NOTEOFF; ev->flags |= SNDRV_SEQ_PRIORITY_HIGH; /* add the duration time */ switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) { case SNDRV_SEQ_TIME_STAMP_TICK: ev->time.tick += ev->data.note.duration; break; case SNDRV_SEQ_TIME_STAMP_REAL: /* unit for duration is ms */ ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000); ev->time.time.tv_sec += ev->data.note.duration / 1000 + ev->time.time.tv_nsec / 1000000000; ev->time.time.tv_nsec %= 1000000000; break; } ev->data.note.velocity = ev->data.note.off_velocity; /* Now queue this cell as the note off event */ if (snd_seq_enqueue_event(cell, atomic, hop) < 0) snd_seq_cell_free(cell); /* release this cell */ } else { /* Normal events: * event cell is freed after processing the event */ result = snd_seq_deliver_event(client, &cell->event, atomic, hop); snd_seq_cell_free(cell); } snd_seq_client_unlock(client); return result; }

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Jaroslav Kysela28194.61%133.33%
Takashi Iwai165.39%266.67%
Total297100.00%3100.00%

/* Allocate a cell from client pool and enqueue it to queue: * if pool is empty and blocking is TRUE, sleep until a new cell is * available. */
static int snd_seq_client_enqueue_event(struct snd_seq_client *client, struct snd_seq_event *event, struct file *file, int blocking, int atomic, int hop) { struct snd_seq_event_cell *cell; int err; /* special queue values - force direct passing */ if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; event->queue = SNDRV_SEQ_QUEUE_DIRECT; } else #ifdef SUPPORT_BROADCAST if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) { event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST; event->queue = SNDRV_SEQ_QUEUE_DIRECT; } #endif if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) { /* check presence of source port */ struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port); if (src_port == NULL) return -EINVAL; snd_seq_port_unlock(src_port); } /* direct event processing without enqueued */ if (snd_seq_ev_is_direct(event)) { if (event->type == SNDRV_SEQ_EVENT_NOTE) return -EINVAL; /* this event must be enqueued! */ return snd_seq_deliver_event(client, event, atomic, hop); } /* Not direct, normal queuing */ if (snd_seq_queue_is_used(event->queue, client->number) <= 0) return -EINVAL; /* invalid queue */ if (! snd_seq_write_pool_allocated(client)) return -ENXIO; /* queue is not allocated */ /* allocate an event cell */ err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file); if (err < 0) return err; /* we got a cell. enqueue it. */ if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) { snd_seq_cell_free(cell); return err; } return 0; }

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Jaroslav Kysela26097.01%266.67%
Takashi Iwai82.99%133.33%
Total268100.00%3100.00%

/* * check validity of event type and data length. * return non-zero if invalid. */
static int check_event_type_and_length(struct snd_seq_event *ev) { switch (snd_seq_ev_length_type(ev)) { case SNDRV_SEQ_EVENT_LENGTH_FIXED: if (snd_seq_ev_is_variable_type(ev)) return -EINVAL; break; case SNDRV_SEQ_EVENT_LENGTH_VARIABLE: if (! snd_seq_ev_is_variable_type(ev) || (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN) return -EINVAL; break; case SNDRV_SEQ_EVENT_LENGTH_VARUSR: if (! snd_seq_ev_is_direct(ev)) return -EINVAL; break; } return 0; }

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Jaroslav Kysela8397.65%150.00%
Takashi Iwai22.35%150.00%
Total85100.00%2100.00%

/* handle write() */ /* possible error values: * -ENXIO invalid client or file open mode * -ENOMEM malloc failed * -EFAULT seg. fault during copy from user space * -EINVAL invalid event * -EAGAIN no space in output pool * -EINTR interrupts while sleep * -EMLINK too many hops * others depends on return value from driver callback */
static ssize_t snd_seq_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) { struct snd_seq_client *client = file->private_data; int written = 0, len; int err = -EINVAL; struct snd_seq_event event; if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT)) return -ENXIO; /* check client structures are in place */ if (snd_BUG_ON(!client)) return -ENXIO; if (!client->accept_output || client->pool == NULL) return -ENXIO; /* allocate the pool now if the pool is not allocated yet */ if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) { if (snd_seq_pool_init(client->pool) < 0) return -ENOMEM; } /* only process whole events */ while (count >= sizeof(struct snd_seq_event)) { /* Read in the event header from the user */ len = sizeof(event); if (copy_from_user(&event, buf, len)) { err = -EFAULT; break; } event.source.client = client->number; /* fill in client number */ /* Check for extension data length */ if (check_event_type_and_length(&event)) { err = -EINVAL; break; } /* check for special events */ if (event.type == SNDRV_SEQ_EVENT_NONE) goto __skip_event; else if (snd_seq_ev_is_reserved(&event)) { err = -EINVAL; break; } if (snd_seq_ev_is_variable(&event)) { int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK; if ((size_t)(extlen + len) > count) { /* back out, will get an error this time or next */ err = -EINVAL; break; } /* set user space pointer */ event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR; event.data.ext.ptr = (char __force *)buf + sizeof(struct snd_seq_event); len += extlen; /* increment data length */ } else { #ifdef CONFIG_COMPAT if (client->convert32 && snd_seq_ev_is_varusr(&event)) { void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]); event.data.ext.ptr = ptr; } #endif } /* ok, enqueue it */ err = snd_seq_client_enqueue_event(client, &event, file, !(file->f_flags & O_NONBLOCK), 0, 0); if (err < 0) break; __skip_event: /* Update pointers and counts */ count -= len; buf += len; written += len; } return written ? written : err; }

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Jaroslav Kysela39793.85%440.00%
Takashi Iwai184.26%220.00%
Clemens Ladisch61.42%220.00%
Linus Torvalds10.24%110.00%
Al Viro10.24%110.00%
Total423100.00%10100.00%

/* * handle polling */
static unsigned int snd_seq_poll(struct file *file, poll_table * wait) { struct snd_seq_client *client = file->private_data; unsigned int mask = 0; /* check client structures are in place */ if (snd_BUG_ON(!client)) return -ENXIO; if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) && client->data.user.fifo) { /* check if data is available in the outqueue */ if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait)) mask |= POLLIN | POLLRDNORM; } if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) { /* check if data is available in the pool */ if (!snd_seq_write_pool_allocated(client) || snd_seq_pool_poll_wait(client->pool, file, wait)) mask |= POLLOUT | POLLWRNORM; } return mask; }

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Jaroslav Kysela11790.70%133.33%
Takashi Iwai129.30%266.67%
Total129100.00%3100.00%

/*-----------------------------------------------------*/
static int snd_seq_ioctl_pversion(struct snd_seq_client *client, void *arg) { int *pversion = arg; *pversion = SNDRV_SEQ_VERSION; return 0; }

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Takashi Sakamoto29100.00%1100.00%
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static int snd_seq_ioctl_client_id(struct snd_seq_client *client, void *arg) { int *client_id = arg; *client_id = client->number; return 0; }

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Takashi Sakamoto31100.00%1100.00%
Total31100.00%1100.00%

/* SYSTEM_INFO ioctl() */
static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void *arg) { struct snd_seq_system_info *info = arg; memset(info, 0, sizeof(*info)); /* fill the info fields */ info->queues = SNDRV_SEQ_MAX_QUEUES; info->clients = SNDRV_SEQ_MAX_CLIENTS; info->ports = SNDRV_SEQ_MAX_PORTS; info->channels = 256; /* fixed limit */ info->cur_clients = client_usage.cur; info->cur_queues = snd_seq_queue_get_cur_queues(); return 0; }

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Jaroslav Kysela6278.48%120.00%
Takashi Sakamoto1012.66%120.00%
Takashi Iwai45.06%120.00%
Linus Torvalds22.53%120.00%
Clemens Ladisch11.27%120.00%
Total79100.00%5100.00%

/* RUNNING_MODE ioctl() */
static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void *arg) { struct snd_seq_running_info *info = arg; struct snd_seq_client *cptr; int err = 0; /* requested client number */ cptr = snd_seq_client_use_ptr(info->client); if (cptr == NULL) return -ENOENT; /* don't change !!! */ #ifdef SNDRV_BIG_ENDIAN if (!info->big_endian) { err = -EINVAL; goto __err; } #else if (info->big_endian) { err = -EINVAL; goto __err; } #endif if (info->cpu_mode > sizeof(long)) { err = -EINVAL; goto __err; } cptr->convert32 = (info->cpu_mode < sizeof(long)); __err: snd_seq_client_unlock(cptr); return err; }

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Jaroslav Kysela12489.21%125.00%
Takashi Sakamoto85.76%125.00%
Takashi Iwai53.60%125.00%
Linus Torvalds21.44%125.00%
Total139100.00%4100.00%

/* CLIENT_INFO ioctl() */
static void get_client_info(struct snd_seq_client *cptr, struct snd_seq_client_info *info) { info->client = cptr->number; /* fill the info fields */ info->type = cptr->type; strcpy(info->name, cptr->name); info->filter = cptr->filter; info->event_lost = cptr->event_lost; memcpy(info->event_filter, cptr->event_filter, 32); info->num_ports = cptr->num_ports; if (cptr->type == USER_CLIENT) info->pid = pid_vnr(cptr->data.user.owner); else info->pid = -1; if (cptr->type == KERNEL_CLIENT) info->card = cptr->data.kernel.card ? cptr->data.kernel.card->number : -1; else info->card = -1; memset(info->reserved, 0, sizeof(info->reserved)); }

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Jaroslav Kysela9355.03%250.00%
Martin Koegler7242.60%125.00%
Takashi Iwai42.37%125.00%
Total169100.00%4100.00%


static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client, void *arg) { struct snd_seq_client_info *client_info = arg; struct snd_seq_client *cptr; /* requested client number */ cptr = snd_seq_client_use_ptr(client_info->client); if (cptr == NULL) return -ENOENT; /* don't change !!! */ get_client_info(cptr, client_info); snd_seq_client_unlock(cptr); return 0; }

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Jaroslav Kysela4977.78%125.00%
Takashi Sakamoto812.70%125.00%
Takashi Iwai46.35%125.00%
Linus Torvalds23.17%125.00%
Total63100.00%4100.00%

/* CLIENT_INFO ioctl() */
static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, void *arg) { struct snd_seq_client_info *client_info = arg; /* it is not allowed to set the info fields for an another client */ if (client->number != client_info->client) return -EPERM; /* also client type must be set now */ if (client->type != client_info->type) return -EINVAL; /* fill the info fields */ if (client_info->name[0]) strlcpy(client->name, client_info->name, sizeof(client->name)); client->filter = client_info->filter; client->event_lost = client_info->event_lost; memcpy(client->event_filter, client_info->event_filter, 32); return 0; }

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Jaroslav Kysela9584.82%233.33%
Takashi Sakamoto108.93%116.67%
Takashi Iwai43.57%116.67%
Linus Torvalds21.79%116.67%
Benjamin Collins10.89%116.67%
Total112100.00%6100.00%

/* * CREATE PORT ioctl() */
static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) { struct snd_seq_port_info *info = arg; struct snd_seq_client_port *port; struct snd_seq_port_callback *callback; /* it is not allowed to create the port for an another client */ if (info->addr.client != client->number) return -EPERM; port = snd_seq_create_port(client, (info->flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info->addr.port : -1); if (port == NULL) return -ENOMEM; if (client->type == USER_CLIENT && info->kernel) { snd_seq_delete_port(client, port->addr.port); return -EINVAL; } if (client->type == KERNEL_CLIENT) { if ((callback = info->kernel) != NULL) { if (callback->owner) port->owner = callback->owner; port->private_data = callback->private_data; port->private_free = callback->private_free; port->event_input = callback->event_input; port->c_src.open = callback->subscribe; port->c_src.close = callback->unsubscribe; port->c_dest.open = callback->use; port->c_dest.close = callback->unuse; } } info->addr = port->addr; snd_seq_set_port_info(port, info); snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); return 0; }

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Jaroslav Kysela22691.50%125.00%
Takashi Sakamoto135.26%125.00%
Takashi Iwai62.43%125.00%
Linus Torvalds20.81%125.00%
Total247100.00%4100.00%

/* * DELETE PORT ioctl() */
static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, void *arg) { struct snd_seq_port_info *info = arg; int err; /* it is not allowed to remove the port for an another client */ if (info->addr.client != client->number) return -EPERM; err = snd_seq_delete_port(client, info->addr.port); if (err >= 0) snd_seq_system_client_ev_port_exit(client->number, info->addr.port); return err; }

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Jaroslav Kysela6584.42%125.00%
Takashi Sakamoto67.79%125.00%
Takashi Iwai45.19%125.00%
Linus Torvalds22.60%125.00%
Total77100.00%4100.00%

/* * GET_PORT_INFO ioctl() (on any client) */
static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, void *arg) { struct snd_seq_port_info *info = arg; struct snd_seq_client *cptr; struct snd_seq_client_port *port; cptr = snd_seq_client_use_ptr(info->addr.client); if (cptr == NULL) return -ENXIO; port = snd_seq_port_use_ptr(cptr, info->addr.port); if (port == NULL) { snd_seq_client_unlock(cptr); return -ENOENT; /* don't change */ } /* get port info */ snd_seq_get_port_info(port, info); snd_seq_port_unlock(port); snd_seq_client_unlock(cptr); return 0; }

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Jaroslav Kysela8883.81%125.00%
Takashi Sakamoto98.57%125.00%
Takashi Iwai65.71%125.00%
Linus Torvalds21.90%125.00%
Total105100.00%4100.00%

/* * SET_PORT_INFO ioctl() (only ports on this/own client) */
static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, void *arg) { struct snd_seq_port_info *info = arg; struct snd_seq_client_port *port; if (info->addr.client != client->number) /* only set our own ports ! */ return -EPERM; port = snd_seq_port_use_ptr(client, info->addr.port); if (port) { snd_seq_set_port_info(port, info); snd_seq_port_unlock(port); } return 0; }

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Jaroslav Kysela6380.77%125.00%
Takashi Sakamoto911.54%125.00%
Takashi Iwai45.13%125.00%
Linus Torvalds22.56%125.00%
Total78100.00%4100.00%

/* * port subscription (connection) */ #define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ) #define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
static int check_subscription_permission(struct snd_seq_client *client, struct snd_seq_client_port *sport, struct snd_seq_client_port *dport, struct snd_seq_port_subscribe *subs) { if (client->number != subs->sender.client && client->number != subs->dest.client) { /* connection by third client - check export permission */ if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) return -EPERM; if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT)) return -EPERM; } /* check read permission */ /* if sender or receiver is the subscribing client itself, * no permission check is necessary */ if (client->number != subs->sender.client) { if (! check_port_perm(sport, PERM_RD)) return -EPERM; } /* check write permission */ if (client->number != subs->dest.client) { if (! check_port_perm(dport, PERM_WR)) return -EPERM; } return 0; }

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Jaroslav Kysela13194.24%150.00%
Takashi Iwai85.76%150.00%
Total139100.00%2100.00%

/* * send an subscription notify event to user client: * client must be user client. */
int snd_seq_client_notify_subscription(int client, int port, struct snd_seq_port_subscribe *info, int evtype) { struct snd_seq_event event; memset(&event, 0, sizeof(event)); event.type = evtype; event.data.connect.dest = info->dest; event.data.connect.sender = info->sender; return snd_seq_system_notify(client, port, &event); /* non-atomic */ }

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Jaroslav Kysela7494.87%150.00%
Takashi Iwai45.13%150.00%
Total78100.00%2100.00%

/* * add to port's subscription list IOCTL interface */
static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client, void *arg) { struct snd_seq_port_subscribe *subs = arg; int result = -EINVAL; struct snd_seq_client *receiver = NULL, *sender = NULL; struct snd_seq_client_port *sport = NULL, *dport = NULL; if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) goto __end; if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) goto __end; if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) goto __end; if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) goto __end; result = check_subscription_permission(client, sport, dport, subs); if (result < 0) goto __end; /* connect them */ result = snd_seq_port_connect(client, sender, sport, receiver, dport, subs); if (! result) /* broadcast announce */ snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED); __end: if (sport) snd_seq_port_unlock(sport); if (dport) snd_seq_port_unlock(dport); if (sender) snd_seq_client_unlock(sender); if (receiver) snd_seq_client_unlock(receiver); return result; }

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Jaroslav Kysela21591.88%125.00%
Takashi Sakamoto114.70%125.00%
Takashi Iwai62.56%125.00%
Linus Torvalds20.85%125.00%
Total234100.00%4100.00%

/* * remove from port's subscription list */
static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client, void *arg) { struct snd_seq_port_subscribe *subs = arg; int result = -ENXIO; struct snd_seq_client *receiver = NULL, *sender = NULL; struct snd_seq_client_port *sport = NULL, *dport = NULL; if ((receiver = snd_seq_client_use_ptr(subs->dest.client)) == NULL) goto __end; if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) goto __end; if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) goto __end; if ((dport = snd_seq_port_use_ptr(receiver, subs->dest.port)) == NULL) goto __end; result = check_subscription_permission(client, sport, dport, subs); if (result < 0) goto __end; result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, subs); if (! result) /* broadcast announce */ snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0, subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED); __end: if (sport) snd_seq_port_unlock(sport); if (dport) snd_seq_port_unlock(dport); if (sender) snd_seq_client_unlock(sender); if (receiver) snd_seq_client_unlock(receiver); return result; }

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Jaroslav Kysela21491.85%125.00%
Takashi Sakamoto114.72%125.00%
Takashi Iwai62.58%125.00%
Linus Torvalds20.86%125.00%
Total233100.00%4100.00%

/* CREATE_QUEUE ioctl() */
static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_info *info = arg; int result; struct snd_seq_queue *q; result = snd_seq_queue_alloc(client->number, info->locked, info->flags); if (result < 0) return result; q = queueptr(result); if (q == NULL) return -EINVAL; info->queue = q->queue; info->locked = q->locked; info->owner = q->owner; /* set queue name */ if (!info->name[0]) snprintf(info->name, sizeof(info->name), "Queue-%d", q->queue); strlcpy(q->name, info->name, sizeof(q->name)); queuefree(q); return 0; }

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Jaroslav Kysela12681.82%120.00%
Takashi Sakamoto127.79%120.00%
Benjamin Collins85.19%120.00%
Takashi Iwai63.90%120.00%
Linus Torvalds21.30%120.00%
Total154100.00%5100.00%

/* DELETE_QUEUE ioctl() */
static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_info *info = arg; return snd_seq_queue_delete(client->number, info->queue); }

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Jaroslav Kysela2470.59%125.00%
Takashi Sakamoto411.76%125.00%
Takashi Iwai411.76%125.00%
Linus Torvalds25.88%125.00%
Total34100.00%4100.00%

/* GET_QUEUE_INFO ioctl() */
static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_info *info = arg; struct snd_seq_queue *q; q = queueptr(info->queue); if (q == NULL) return -EINVAL; memset(info, 0, sizeof(*info)); info->queue = q->queue; info->owner = q->owner; info->locked = q->locked; strlcpy(info->name, q->name, sizeof(info->name)); queuefree(q); return 0; }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela9082.57%120.00%
Takashi Sakamoto109.17%120.00%
Takashi Iwai65.50%120.00%
Linus Torvalds21.83%120.00%
Benjamin Collins10.92%120.00%
Total109100.00%5100.00%

/* SET_QUEUE_INFO ioctl() */
static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_info *info = arg; struct snd_seq_queue *q; if (info->owner != client->number) return -EINVAL; /* change owner/locked permission */ if (snd_seq_queue_check_access(info->queue, client->number)) { if (snd_seq_queue_set_owner(info->queue, client->number, info->locked) < 0) return -EPERM; if (info->locked) snd_seq_queue_use(info->queue, client->number, 1); } else { return -EPERM; } q = queueptr(info->queue); if (! q) return -EINVAL; if (q->owner != client->number) { queuefree(q); return -EPERM; } strlcpy(q->name, info->name, sizeof(q->name)); queuefree(q); return 0; }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela15188.30%120.00%
Takashi Sakamoto116.43%120.00%
Takashi Iwai63.51%120.00%
Linus Torvalds21.17%120.00%
Benjamin Collins10.58%120.00%
Total171100.00%5100.00%

/* GET_NAMED_QUEUE ioctl() */
static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_info *info = arg; struct snd_seq_queue *q; q = snd_seq_queue_find_name(info->name); if (q == NULL) return -EINVAL; info->queue = q->queue; info->owner = q->owner; info->locked = q->locked; queuefree(q); return 0; }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela6380.77%125.00%
Takashi Sakamoto78.97%125.00%
Takashi Iwai67.69%125.00%
Linus Torvalds22.56%125.00%
Total78100.00%4100.00%

/* GET_QUEUE_STATUS ioctl() */
static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_status *status = arg; struct snd_seq_queue *queue; struct snd_seq_timer *tmr; queue = queueptr(status->queue); if (queue == NULL) return -EINVAL; memset(status, 0, sizeof(*status)); status->queue = queue->queue; tmr = queue->timer; status->events = queue->tickq->cells + queue->timeq->cells; status->time = snd_seq_timer_get_cur_time(tmr); status->tick = snd_seq_timer_get_cur_tick(tmr); status->running = tmr->running; status->flags = queue->flags; queuefree(queue); return 0; }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela11584.56%125.00%
Takashi Sakamoto118.09%125.00%
Takashi Iwai85.88%125.00%
Linus Torvalds21.47%125.00%
Total136100.00%4100.00%

/* GET_QUEUE_TEMPO ioctl() */
static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_tempo *tempo = arg; struct snd_seq_queue *queue; struct snd_seq_timer *tmr; queue = queueptr(tempo->queue); if (queue == NULL) return -EINVAL; memset(tempo, 0, sizeof(*tempo)); tempo->queue = queue->queue; tmr = queue->timer; tempo->tempo = tmr->tempo; tempo->ppq = tmr->ppq; tempo->skew_value = tmr->skew; tempo->skew_base = tmr->skew_base; queuefree(queue); return 0; }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela9883.05%125.00%
Takashi Sakamoto108.47%125.00%
Takashi Iwai86.78%125.00%
Linus Torvalds21.69%125.00%
Total118100.00%4100.00%

/* SET_QUEUE_TEMPO ioctl() */
int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo) { if (!snd_seq_queue_check_access(tempo->queue, client)) return -EPERM; return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo); }

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Jaroslav Kysela3995.12%150.00%
Takashi Iwai24.88%150.00%
Total41100.00%2100.00%

EXPORT_SYMBOL(snd_seq_set_queue_tempo);
static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_tempo *tempo = arg; int result; result = snd_seq_set_queue_tempo(client->number, tempo); return result < 0 ? result : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jaroslav Kysela3373.33%240.00%
Takashi Sakamoto613.33%120.00%
Takashi Iwai48.89%120.00%
Linus Torvalds24.44%120.00%
Total45100.00%5100.00%

/* GET_QUEUE_TIMER ioctl() */
static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_timer *timer = arg; struct snd_seq_queue *queue; struct snd_seq_timer *tmr; queue = queueptr(timer->queue); if (queue == NULL) return -EINVAL; if (mutex_lock_interruptible(&queue->timer_mutex)) { queuefree(queue); return -ERESTARTSYS; } tmr = queue->timer; memset(timer, 0, sizeof(*timer)); timer->queue = queue->queue; timer->type = tmr->type; if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { timer->u.alsa.id = tmr->alsa_id; timer->u.alsa.resolution = tmr->preferred_resolution; } mutex_unlock(&queue->timer_mutex); queuefree(queue); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jaroslav Kysela13686.62%120.00%
Takashi Sakamoto95.73%120.00%
Takashi Iwai85.10%120.00%
Linus Torvalds21.27%120.00%
Ingo Molnar21.27%120.00%
Total157100.00%5100.00%

/* SET_QUEUE_TIMER ioctl() */
static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_timer *timer = arg; int result = 0; if (timer->type != SNDRV_SEQ_TIMER_ALSA) return -EINVAL; if (snd_seq_queue_check_access(timer->queue, client->number)) { struct snd_seq_queue *q; struct snd_seq_timer *tmr; q = queueptr(timer->queue); if (q == NULL) return -ENXIO; if (mutex_lock_interruptible(&q->timer_mutex)) { queuefree(q); return -ERESTARTSYS; } tmr = q->timer; snd_seq_queue_timer_close(timer->queue); tmr->type = timer->type; if (tmr->type == SNDRV_SEQ_TIMER_ALSA) { tmr->alsa_id = timer->u.alsa.id; tmr->preferred_resolution = timer->u.alsa.resolution; } result = snd_seq_queue_timer_open(timer->queue); mutex_unlock(&q->timer_mutex); queuefree(q); } else { return -EPERM; } return result; }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela16686.91%120.00%
Takashi Sakamoto157.85%120.00%
Takashi Iwai63.14%120.00%
Linus Torvalds21.05%120.00%
Ingo Molnar21.05%120.00%
Total191100.00%5100.00%

/* GET_QUEUE_CLIENT ioctl() */
static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_client *info = arg; int used; used = snd_seq_queue_is_used(info->queue, client->number); if (used < 0) return -EINVAL; info->used = used; info->client = client->number; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jaroslav Kysela5381.54%125.00%
Takashi Sakamoto69.23%125.00%
Takashi Iwai46.15%125.00%
Linus Torvalds23.08%125.00%
Total65100.00%4100.00%

/* SET_QUEUE_CLIENT ioctl() */
static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client, void *arg) { struct snd_seq_queue_client *info = arg; int err; if (info->used >= 0) { err = snd_seq_queue_use(info->queue, client->number, info->used); if (err < 0) return err; } return snd_seq_ioctl_get_queue_client(client, arg); }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela5478.26%125.00%
Takashi Sakamoto913.04%125.00%
Takashi Iwai45.80%125.00%
Linus Torvalds22.90%125.00%
Total69100.00%4100.00%

/* GET_CLIENT_POOL ioctl() */
static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, void *arg) { struct snd_seq_client_pool *info = arg; struct snd_seq_client *cptr; cptr = snd_seq_client_use_ptr(info->client); if (cptr == NULL) return -ENOENT; memset(info, 0, sizeof(*info)); info->client = cptr->number; info->output_pool = cptr->pool->size; info->output_room = cptr->pool->room; info->output_free = info->output_pool; info->output_free = snd_seq_unused_cells(cptr->pool); if (cptr->type == USER_CLIENT) { info->input_pool = cptr->data.user.fifo_pool_size; info->input_free = info->input_pool; if (cptr->data.user.fifo) info->input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); } else { info->input_pool = 0; info->input_free = 0; } snd_seq_client_unlock(cptr); return 0; }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela15482.80%120.00%
Takashi Sakamoto2412.90%240.00%
Takashi Iwai63.23%120.00%
Linus Torvalds21.08%120.00%
Total186100.00%5100.00%

/* SET_CLIENT_POOL ioctl() */
static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, void *arg) { struct snd_seq_client_pool *info = arg; int rc; if (client->number != info->client) return -EINVAL; /* can't change other clients */ if (info->output_pool >= 1 && info->output_pool <= SNDRV_SEQ_MAX_EVENTS && (! snd_seq_write_pool_allocated(client) || info->output_pool != client->pool->size)) { if (snd_seq_write_pool_allocated(client)) { /* remove all existing cells */ snd_seq_pool_mark_closing(client->pool); snd_seq_queue_client_leave_cells(client->number); snd_seq_pool_done(client->pool); } client->pool->size = info->output_pool; rc = snd_seq_pool_init(client->pool); if (rc < 0) return rc; } if (client->type == USER_CLIENT && client->data.user.fifo != NULL && info->input_pool >= 1 && info->input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && info->input_pool != client->data.user.fifo_pool_size) { /* change pool size */ rc = snd_seq_fifo_resize(client->data.user.fifo, info->input_pool); if (rc < 0) return rc; client->data.user.fifo_pool_size = info->input_pool; } if (info->output_room >= 1 && info->output_room <= client->pool->size) { client->pool->room = info->output_room; } return snd_seq_ioctl_get_client_pool(client, arg); }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela22588.58%120.00%
Takashi Sakamoto166.30%120.00%
Takashi Iwai114.33%240.00%
Linus Torvalds20.79%120.00%
Total254100.00%5100.00%

/* REMOVE_EVENTS ioctl() */
static int snd_seq_ioctl_remove_events(struct snd_seq_client *client, void *arg) { struct snd_seq_remove_events *info = arg; /* * Input mostly not implemented XXX. */ if (info->remove_mode & SNDRV_SEQ_REMOVE_INPUT) { /* * No restrictions so for a user client we can clear * the whole fifo */ if (client->type == USER_CLIENT && client->data.user.fifo) snd_seq_fifo_clear(client->data.user.fifo); } if (info->remove_mode & SNDRV_SEQ_REMOVE_OUTPUT) snd_seq_queue_remove_cells(client->number, info); return 0; }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela6276.54%120.00%
Takashi Iwai1214.81%240.00%
Takashi Sakamoto56.17%120.00%
Linus Torvalds22.47%120.00%
Total81100.00%5100.00%

/* * get subscription info */
static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client, void *arg) { struct snd_seq_port_subscribe *subs = arg; int result; struct snd_seq_client *sender = NULL; struct snd_seq_client_port *sport = NULL; struct snd_seq_subscribers *p; result = -EINVAL; if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL) goto __end; if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL) goto __end; p = snd_seq_port_get_subscription(&sport->c_src, &subs->dest); if (p) { result = 0; *subs = p->info; } else result = -ENOENT; __end: if (sport) snd_seq_port_unlock(sport); if (sender) snd_seq_client_unlock(sender); return result; }

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PersonTokensPropCommitsCommitProp
Jaroslav Kysela13186.18%125.00%
Takashi Sakamoto117.24%125.00%
Takashi Iwai85.26%125.00%
Linus Torvalds21.32%125.00%
Total152100.00%4100.00%

/* * get subscription info - check only its presence */
static int snd_seq_ioctl_query_subs(struct snd_seq_client *client, void *arg) { struct snd_seq_query_subs *subs = arg; int result = -ENXIO; struct snd_seq_client *cptr = NULL; struct snd_seq_client_port *port = NULL; struct snd_seq_port_subs_info *group; struct list_head *p; int i; if ((cptr = snd_seq_client_use_ptr(subs->root.client)) == NULL) goto __end; if ((port = snd_seq_port_use_ptr(cptr, subs->root.port)) == NULL) goto __end; switch (subs->type) { case SNDRV_SEQ_QUERY_SUBS_READ: group = &port->c_src; break; case SNDRV_SEQ_QUERY_SUBS_WRITE: group = &port->c_dest; break; default: goto __end; } down_read(&group->list_mutex); /* search for the subscriber */ subs->num_subs = group->count; i = 0; result = -ENOENT; list_for_each(p, &group->list_head) { if (i++ == subs->index) { /* found! */ struct snd_seq_subscribers *s; if (subs->type == SNDRV_SEQ_QUERY_SUBS_READ) { s = list_entry(p, struct snd_seq_subscribers, src_list); subs->addr = s->info.dest; } else { s = list_entry(p, struct snd_seq_subscribers, dest_list); subs->addr = s->info.sender; } subs->flags = s->info.flags; subs->queue = s->info.queue; result = 0; break; } } up_read(&group->list_mutex); __end: if (port) snd_seq_port_unlock(port); if (cptr) snd_seq_client_unlock(cptr); return result; }

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Jaroslav Kysela25887.46%125.00%
Takashi Sakamoto217.12%125.00%
Takashi Iwai144.75%125.00%
Linus Torvalds20.68%125.00%
Total295100.00%4100.00%

/* * query next client */
static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client, void *arg) { struct snd_seq_client_info *info = arg; struct snd_seq_client *cptr = NULL; /* search for next client */ info->client++; if (info->client < 0) info->client = 0; for (; info->client < SNDRV_SEQ_MAX_CLIENTS; info->client++) { cptr = snd_seq_client_use_ptr(info->client); if (cptr) break; /* found */ } if (cptr == NULL) return -ENOENT; get_client_info(cptr, info); snd_seq_client_unlock(cptr); return 0; }

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Jaroslav Kysela8681.90%125.00%
Takashi Sakamoto1312.38%125.00%
Takashi Iwai43.81%125.00%
Linus Torvalds21.90%125.00%
Total105100.00%4100.00%

/* * query next port */
static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client, void *arg) { struct snd_seq_port_info *info = arg; struct snd_seq_client *cptr; struct snd_seq_client_port *port = NULL; cptr = snd_seq_client_use_ptr(info->addr.client); if (cptr == NULL) return -ENXIO; /* search for next port */ info->addr.port++; port = snd_seq_port_query_nearest(cptr, info); if (port == NULL) { snd_seq_client_unlock(cptr); return -ENOENT; } /* get port info */ info->addr = port->addr; snd_seq_get_port_info(port, info); snd_seq_port_unlock(port); snd_seq_client_unlock(cptr); return 0; }

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Jaroslav Kysela10084.75%125.00%
Takashi Sakamoto108.47%125.00%
Takashi Iwai65.08%125.00%
Linus Torvalds21.69%125.00%
Total118100.00%4100.00%

/* -------------------------------------------------------- */ static const struct ioctl_handler { unsigned int cmd; int (*func)(struct snd_seq_client *client, void *arg); } ioctl_handlers[] = { { SNDRV_SEQ_IOCTL_PVERSION, snd_seq_ioctl_pversion }, { SNDRV_SEQ_IOCTL_CLIENT_ID, snd_seq_ioctl_client_id }, { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info }, { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode }, { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info }, { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info }, { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port }, { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port }, { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info }, { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info }, { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port }, { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port }, { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue }, { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue }, { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info }, { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info }, { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue }, { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status }, { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo }, { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo }, { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer }, { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer }, { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client }, { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client }, { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool }, { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool }, { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription }, { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client }, { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port }, { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events }, { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs }, { 0, NULL }, };
static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct snd_seq_client *client = file->private_data; /* To use kernel stack for ioctl data. */ union { int pversion; int client_id; struct snd_seq_system_info system_info; struct snd_seq_running_info running_info; struct snd_seq_client_info client_info; struct snd_seq_port_info port_info; struct snd_seq_port_subscribe port_subscribe; struct snd_seq_queue_info queue_info; struct snd_seq_queue_status queue_status; struct snd_seq_queue_tempo tempo; struct snd_seq_queue_timer queue_timer; struct snd_seq_queue_client queue_client; struct snd_seq_client_pool client_pool; struct snd_seq_remove_events remove_events; struct snd_seq_query_subs query_subs; } buf; const struct ioctl_handler *handler; unsigned long size; int err; if (snd_BUG_ON(!client)) return -ENXIO; for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { if (handler->cmd == cmd) break; } if (handler->cmd == 0) return -ENOTTY; memset(&buf, 0, sizeof(buf)); /* * All of ioctl commands for ALSA sequencer get an argument of size * within 13 bits. We can safely pick up the size from the command. */ size = _IOC_SIZE(handler->cmd); if (handler->cmd & IOC_IN) { if (copy_from_user(&buf, (const void __user *)arg, size)) return -EFAULT; } err = handler->func(client, &buf); if (err >= 0) { /* Some commands includes a bug in 'dir' field. */ if (handler->cmd == SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT || handler->cmd == SNDRV_SEQ_IOCTL_SET_CLIENT_POOL || (handler->cmd & IOC_OUT)) if (copy_to_user((void __user *)arg, &buf, size)) return -EFAULT; } return err; }

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Takashi Sakamoto277100.00%3100.00%
Total277100.00%3100.00%

#ifdef CONFIG_COMPAT #include "seq_compat.c" #else #define snd_seq_ioctl_compat NULL #endif /* -------------------------------------------------------- */ /* exported to kernel modules */
int snd_seq_create_kernel_client(struct snd_card *card, int client_index, const char *name_fmt, ...) { struct snd_seq_client *client; va_list args; if (snd_BUG_ON(in_interrupt())) return -EBUSY; if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD) return -EINVAL; if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS) return -EINVAL; if (mutex_lock_interruptible(&register_mutex)) return -ERESTARTSYS; if (card) { client_index += SNDRV_SEQ_GLOBAL_CLIENTS + card->number * SNDRV_SEQ_CLIENTS_PER_CARD; if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) client_index = -1; } /* empty write queue as default */ client = seq_create_client1(client_index, 0); if (client == NULL) { mutex_unlock(&register_mutex); return -EBUSY; /* failure code */ } usage_alloc(&client_usage, 1); client->accept_input = 1; client->accept_output = 1; client->data.kernel.card = card; va_start(args, name_fmt); vsnprintf(client->name, sizeof(client->name), name_fmt, args); va_end(args); client->type = KERNEL_CLIENT; mutex_unlock(&register_mutex); /* make others aware this new client */ snd_seq_system_client_ev_client_start(client->number); /* return client number to caller */ return client->number; }

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Jaroslav Kysela13059.09%111.11%
Clemens Ladisch6328.64%444.44%
Takashi Iwai146.36%222.22%
Martin Koegler104.55%111.11%
Ingo Molnar31.36%111.11%
Total220100.00%9100.00%

EXPORT_SYMBOL(snd_seq_create_kernel_client); /* exported to kernel modules */
int snd_seq_delete_kernel_client(int client) { struct snd_seq_client *ptr; if (snd_BUG_ON(in_interrupt())) return -EBUSY; ptr = clientptr(client); if (ptr == NULL) return -EINVAL; seq_free_client(ptr); kfree(ptr); return 0; }

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Jaroslav Kysela4378.18%133.33%
Takashi Iwai1221.82%266.67%
Total55100.00%3100.00%

EXPORT_SYMBOL(snd_seq_delete_kernel_client); /* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue * and snd_seq_kernel_client_enqueue_blocking */
static int kernel_client_enqueue(int client, struct snd_seq_event *ev, struct file *file, int blocking, int atomic, int hop) { struct snd_seq_client *cptr; int result; if (snd_BUG_ON(!ev)) return -EINVAL; if (ev->type == SNDRV_SEQ_EVENT_NONE) return 0; /* ignore this */ if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR) return -EINVAL; /* quoted events can't be enqueued */ /* fill in client number */ ev->source.client = client; if (check_event_type_and_length(ev)) return -EINVAL; cptr = snd_seq_client_use_ptr(client); if (cptr == NULL) return -EINVAL; if (! cptr->accept_output) result = -EPERM; else /* send it */ result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop); snd_seq_client_unlock(cptr); return result; }

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Jaroslav Kysela13590.60%133.33%
Takashi Iwai149.40%266.67%
Total149100.00%3100.00%

/* * exported, called by kernel clients to enqueue events (w/o blocking) * * RETURN VALUE: zero if succeed, negative if error */
int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev, int atomic, int hop) { return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop); }

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Jaroslav Kysela3394.29%150.00%
Takashi Iwai25.71%150.00%
Total35100.00%2100.00%

EXPORT_SYMBOL(snd_seq_kernel_client_enqueue); /* * exported, called by kernel clients to enqueue events (with blocking) * * RETURN VALUE: zero if succeed, negative if error */
int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev, struct file *file, int atomic, int hop) { return kernel_client_enqueue(client, ev, file, 1, atomic, hop); }

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Jaroslav Kysela3895.00%150.00%
Takashi Iwai25.00%150.00%
Total40100.00%2100.00%

EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking); /* * exported, called by kernel clients to dispatch events directly to other * clients, bypassing the queues. Event time-stamp will be updated. * * RETURN VALUE: negative = delivery failed, * zero, or positive: the number of delivered events */
int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev, int atomic, int hop) { struct snd_seq_client *cptr; int result; if (snd_BUG_ON(!ev)) return -EINVAL; /* fill in client number */ ev->queue = SNDRV_SEQ_QUEUE_DIRECT; ev->source.client = client; if (check_event_type_and_length(ev)) return -EINVAL; cptr = snd_seq_client_use_ptr(client); if (cptr == NULL) return -EINVAL; if (!cptr->accept_output) result = -EPERM; else result = snd_seq_deliver_event(cptr, ev, atomic, hop); snd_seq_client_unlock(cptr); return result; }

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Jaroslav Kysela10287.93%133.33%
Takashi Iwai1412.07%266.67%
Total116100.00%3100.00%

EXPORT_SYMBOL(snd_seq_kernel_client_dispatch); /** * snd_seq_kernel_client_ctl - operate a command for a client with data in * kernel space. * @clientid: A numerical ID for a client. * @cmd: An ioctl(2) command for ALSA sequencer operation. * @arg: A pointer to data in kernel space. * * Against its name, both kernel/application client can be handled by this * kernel API. A pointer of 'arg' argument should be in kernel space. * * Return: 0 at success. Negative error code at failure. */
int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) { const struct ioctl_handler *handler; struct snd_seq_client *client; client = clientptr(clientid); if (client == NULL) return -ENXIO; for (handler = ioctl_handlers; handler->cmd > 0; ++handler) { if (handler->cmd == cmd) return handler->func(client, arg); } pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n", cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); return -ENOTTY; }

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Takashi Sakamoto5252.00%250.00%
Jaroslav Kysela4646.00%125.00%
Takashi Iwai22.00%125.00%
Total100100.00%4100.00%

EXPORT_SYMBOL(snd_seq_kernel_client_ctl); /* exported (for OSS emulator) */
int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait) { struct snd_seq_client *client; client = clientptr(clientid); if (client == NULL) return -ENXIO; if (! snd_seq_write_pool_allocated(client)) return 1; if (snd_seq_pool_poll_wait(client->pool, file, wait)) return 1; return 0; }

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Jaroslav Kysela6797.10%150.00%
Takashi Iwai22.90%150.00%
Total69100.00%2100.00%

EXPORT_SYMBOL(snd_seq_kernel_client_write_poll); /*---------------------------------------------------------------------------*/ #ifdef CONFIG_SND_PROC_FS /* * /proc interface */
static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, struct snd_seq_port_subs_info *group, int is_src, char *msg) { struct list_head *p; struct snd_seq_subscribers *s; int count = 0; down_read(&group->list_mutex); if (list_empty(&group->list_head)) { up_read(&group->list_mutex); return; } snd_iprintf(buffer, msg); list_for_each(p, &group->list_head) { if (is_src) s = list_entry(p, struct snd_seq_subscribers, src_list); else s = list_entry(p, struct snd_seq_subscribers, dest_list); if (count++) snd_iprintf(buffer, ", "); snd_iprintf(buffer, "%d:%d", is_src ? s->info.dest.client : s->info.sender.client, is_src ? s->info.dest.port : s->info.sender.port); if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP) snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue); if (group->exclusive) snd_iprintf(buffer, "[ex]"); } up_read(&group->list_mutex); snd_iprintf(buffer, "\n"); }

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Jaroslav Kysela22395.71%150.00%
Takashi Iwai104.29%150.00%
Total233100.00%2100.00%

#define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-') #define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-') #define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e') #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-')
static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, struct snd_seq_client *client) { struct snd_seq_client_port *p; mutex_lock(&client->ports_mutex); list_for_each_entry(p, &client->ports_list_head, list) { snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", p->addr.port, p->name, FLAG_PERM_RD(p->capability), FLAG_PERM_WR(p->capability), FLAG_PERM_EX(p->capability), FLAG_PERM_DUPLEX(p->capability)); snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); } mutex_unlock(&client->ports_mutex); }

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Jaroslav Kysela10890.00%125.00%
Johannes Berg65.00%125.00%
Takashi Iwai43.33%125.00%
Ingo Molnar21.67%125.00%
Total120100.00%4100.00%

/* exported to seq_info.c */
void snd_seq_info_clients_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { int c; struct snd_seq_client *client; snd_iprintf(buffer, "Client info\n"); snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur); snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak); snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS); snd_iprintf(buffer, "\n"); /* list the client table */ for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) { client = snd_seq_client_use_ptr(c); if (client == NULL) continue; if (client->type == NO_CLIENT) { snd_seq_client_unlock(client); continue; } snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n", c, client->name, client->type == USER_CLIENT ? "User" : "Kernel"); snd_seq_info_dump_ports(buffer, client); if (snd_seq_write_pool_allocated(client)) { snd_iprintf(buffer, " Output pool :\n"); snd_seq_info_pool(buffer, client->pool, " "); } if (client->type == USER_CLIENT && client->data.user.fifo && client->data.user.fifo->pool) { snd_iprintf(buffer, " Input pool :\n"); snd_seq_info_pool(buffer, client->data.user.fifo->pool, " "); } snd_seq_client_unlock(client); } }

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Jaroslav Kysela22297.37%266.67%
Takashi Iwai62.63%133.33%
Total228100.00%3100.00%

#endif /* CONFIG_SND_PROC_FS */ /*---------------------------------------------------------------------------*/ /* * REGISTRATION PART */ static const struct file_operations snd_seq_f_ops = { .owner = THIS_MODULE, .read = snd_seq_read, .write = snd_seq_write, .open = snd_seq_open, .release = snd_seq_release, .llseek = no_llseek, .poll = snd_seq_poll, .unlocked_ioctl = snd_seq_ioctl, .compat_ioctl = snd_seq_ioctl_compat, }; static struct device seq_dev; /* * register sequencer device */
int __init snd_sequencer_device_init(void) { int err; snd_device_initialize(&seq_dev, NULL); dev_set_name(&seq_dev, "seq"); if (mutex_lock_interruptible(&register_mutex)) return -ERESTARTSYS; err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, &snd_seq_f_ops, NULL, &seq_dev); if (err < 0) { mutex_unlock(&register_mutex); put_device(&seq_dev); return err; } mutex_unlock(&register_mutex); return 0; }

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Jaroslav Kysela5662.22%120.00%
Takashi Iwai2831.11%120.00%
Clemens Ladisch33.33%240.00%
Ingo Molnar33.33%120.00%
Total90100.00%5100.00%

/* * unregister sequencer device */
void __exit snd_sequencer_device_done(void) { snd_unregister_device(&seq_dev); put_device(&seq_dev); }

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Jaroslav Kysela1470.00%133.33%
Takashi Iwai630.00%266.67%
Total20100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Jaroslav Kysela949384.65%2235.48%
Takashi Sakamoto7356.55%69.68%
Takashi Iwai6115.45%1219.35%
Martin Koegler1090.97%11.61%
Clemens Ladisch980.87%914.52%
Linus Torvalds610.54%23.23%
Adam Goode510.45%11.61%
Ingo Molnar200.18%11.61%
Johannes Berg170.15%23.23%
Benjamin Collins110.10%11.61%
Paul Gortmaker30.03%11.61%
Jie Yang20.02%11.61%
Jesper Juhl20.02%11.61%
Al Viro10.01%11.61%
Arjan van de Ven10.01%11.61%
Total11215100.00%62100.00%
Directory: sound/core/seq
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