/*
* Get scheduler in the scheduler list by name
*/
static struct ip_vs_scheduler *ip_vs_sched_getbyname(const char *sched_name)
{
struct ip_vs_scheduler *sched;
struct list_head *l, *e;
IP_VS_DBG(2, "ip_vs_sched_getbyname(): sched_name \"%s\"\n",
sched_name);
l = &ip_vs_schedulers;
read_lock_bh(&__ip_vs_sched_lock);
for (e=l->next; e!=l; e=e->next) {
sched = list_entry(e, struct ip_vs_scheduler, n_list);
/*
* Test and MOD_INC_USE_COUNT atomically
*/
if (sched->module && !try_inc_mod_count(sched->module)) {
/*
* This scheduler is just deleted
*/
continue;
}
if (strcmp(sched_name, sched->name)==0) {
/* HIT */
read_unlock_bh(&__ip_vs_sched_lock);
return sched;
}
if (sched->module)
__MOD_DEC_USE_COUNT(sched->module);
}
read_unlock_bh(&__ip_vs_sched_lock);
return NULL;
}
static int new_user(void *send_info)
{
if (!try_inc_mod_count(THIS_MODULE))
return -EBUSY;
return 0;
}
static int snd_info_entry_open(struct inode *inode, struct file *file)
{
snd_info_entry_t *entry;
snd_info_private_data_t *data;
snd_info_buffer_t *buffer;
struct proc_dir_entry *p;
int mode, err;
down(&info_mutex);
p = (struct proc_dir_entry *) inode->u.generic_ip;
entry = p == NULL ? NULL : (snd_info_entry_t *)p->data;
if (entry == NULL) {
up(&info_mutex);
return -ENODEV;
}
#ifndef LINUX_2_3
MOD_INC_USE_COUNT;
#endif
if (entry->module && !try_inc_mod_count(entry->module)) {
err = -EFAULT;
goto __error1;
}
mode = file->f_flags & O_ACCMODE;
if (mode == O_RDONLY || mode == O_RDWR) {
if ((entry->content == SNDRV_INFO_CONTENT_TEXT &&
!entry->c.text.read_size) ||
(entry->content == SNDRV_INFO_CONTENT_DATA &&
entry->c.ops->read == NULL) ||
entry->content == SNDRV_INFO_CONTENT_DEVICE) {
err = -ENODEV;
goto __error;
}
}
if (mode == O_WRONLY || mode == O_RDWR) {
if ((entry->content == SNDRV_INFO_CONTENT_TEXT &&
!entry->c.text.write_size) ||
(entry->content == SNDRV_INFO_CONTENT_DATA &&
entry->c.ops->write == NULL) ||
entry->content == SNDRV_INFO_CONTENT_DEVICE) {
err = -ENODEV;
goto __error;
}
}
data = snd_magic_kcalloc(snd_info_private_data_t, 0, GFP_KERNEL);
if (data == NULL) {
err = -ENOMEM;
goto __error;
}
data->entry = entry;
switch (entry->content) {
case SNDRV_INFO_CONTENT_TEXT:
if (mode == O_RDONLY || mode == O_RDWR) {
buffer = (snd_info_buffer_t *)
snd_kcalloc(sizeof(snd_info_buffer_t), GFP_KERNEL);
if (buffer == NULL) {
snd_magic_kfree(data);
err = -ENOMEM;
goto __error;
}
buffer->len = (entry->c.text.read_size +
(PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
buffer->buffer = vmalloc(buffer->len);
if (buffer->buffer == NULL) {
kfree(buffer);
snd_magic_kfree(data);
err = -ENOMEM;
goto __error;
}
buffer->curr = buffer->buffer;
data->rbuffer = buffer;
}
if (mode == O_WRONLY || mode == O_RDWR) {
buffer = (snd_info_buffer_t *)
snd_kcalloc(sizeof(snd_info_buffer_t), GFP_KERNEL);
if (buffer == NULL) {
if (mode == O_RDWR) {
vfree(data->rbuffer->buffer);
kfree(data->rbuffer);
}
snd_magic_kfree(data);
err = -ENOMEM;
goto __error;
}
buffer->len = (entry->c.text.write_size +
(PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
buffer->buffer = vmalloc(buffer->len);
if (buffer->buffer == NULL) {
if (mode == O_RDWR) {
vfree(data->rbuffer->buffer);
kfree(data->rbuffer);
}
kfree(buffer);
snd_magic_kfree(data);
err = -ENOMEM;
goto __error;
}
buffer->curr = buffer->buffer;
data->wbuffer = buffer;
}
break;
case SNDRV_INFO_CONTENT_DATA: /* data */
if (entry->c.ops->open) {
if ((err = entry->c.ops->open(entry, mode,
&data->file_private_data)) < 0) {
snd_magic_kfree(data);
goto __error;
}
}
break;
}
file->private_data = data;
up(&info_mutex);
if (entry->content == SNDRV_INFO_CONTENT_TEXT &&
(mode == O_RDONLY || mode == O_RDWR)) {
if (entry->c.text.read) {
down(&entry->access);
entry->c.text.read(entry, data->rbuffer);
up(&entry->access);
}
}
return 0;
__error:
dec_mod_count(entry->module);
__error1:
#ifndef LINUX_2_3
MOD_DEC_USE_COUNT;
#endif
up(&info_mutex);
return err;
}
