diff options
Diffstat (limited to 'sound/core')
-rw-r--r-- | sound/core/control.c | 5 | ||||
-rw-r--r-- | sound/core/info.c | 74 | ||||
-rw-r--r-- | sound/core/oss/mixer_oss.c | 5 | ||||
-rw-r--r-- | sound/core/oss/pcm_oss.c | 5 | ||||
-rw-r--r-- | sound/core/pcm_native.c | 19 | ||||
-rw-r--r-- | sound/core/rawmidi.c | 5 | ||||
-rw-r--r-- | sound/core/seq/seq_clientmgr.c | 6 | ||||
-rw-r--r-- | sound/core/sound.c | 73 | ||||
-rw-r--r-- | sound/core/timer.c | 6 |
9 files changed, 123 insertions, 75 deletions
diff --git a/sound/core/control.c b/sound/core/control.c index 439ce64..070aab4 100644 --- a/sound/core/control.c +++ b/sound/core/control.c @@ -50,6 +50,10 @@ static int snd_ctl_open(struct inode *inode, struct file *file) struct snd_ctl_file *ctl; int err; + err = nonseekable_open(inode, file); + if (err < 0) + return err; + card = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_CONTROL); if (!card) { err = -ENODEV; @@ -1388,6 +1392,7 @@ static const struct file_operations snd_ctl_f_ops = .read = snd_ctl_read, .open = snd_ctl_open, .release = snd_ctl_release, + .llseek = no_llseek, .poll = snd_ctl_poll, .unlocked_ioctl = snd_ctl_ioctl, .compat_ioctl = snd_ctl_ioctl_compat, diff --git a/sound/core/info.c b/sound/core/info.c index cc4a53d..b70564e 100644 --- a/sound/core/info.c +++ b/sound/core/info.c @@ -164,40 +164,44 @@ static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig) { struct snd_info_private_data *data; struct snd_info_entry *entry; - loff_t ret; + loff_t ret = -EINVAL, size; data = file->private_data; entry = data->entry; - lock_kernel(); - switch (entry->content) { - case SNDRV_INFO_CONTENT_TEXT: - switch (orig) { - case SEEK_SET: - file->f_pos = offset; - ret = file->f_pos; - goto out; - case SEEK_CUR: - file->f_pos += offset; - ret = file->f_pos; - goto out; - case SEEK_END: - default: - ret = -EINVAL; - goto out; - } + mutex_lock(&entry->access); + if (entry->content == SNDRV_INFO_CONTENT_DATA && + entry->c.ops->llseek) { + offset = entry->c.ops->llseek(entry, + data->file_private_data, + file, offset, orig); + goto out; + } + if (entry->content == SNDRV_INFO_CONTENT_DATA) + size = entry->size; + else + size = 0; + switch (orig) { + case SEEK_SET: break; - case SNDRV_INFO_CONTENT_DATA: - if (entry->c.ops->llseek) { - ret = entry->c.ops->llseek(entry, - data->file_private_data, - file, offset, orig); + case SEEK_CUR: + offset += file->f_pos; + break; + case SEEK_END: + if (!size) goto out; - } + offset += size; break; - } - ret = -ENXIO; -out: - unlock_kernel(); + default: + goto out; + } + if (offset < 0) + goto out; + if (size && offset > size) + offset = size; + file->f_pos = offset; + ret = offset; + out: + mutex_unlock(&entry->access); return ret; } @@ -232,10 +236,15 @@ static ssize_t snd_info_entry_read(struct file *file, char __user *buffer, return -EFAULT; break; case SNDRV_INFO_CONTENT_DATA: - if (entry->c.ops->read) + if (pos >= entry->size) + return 0; + if (entry->c.ops->read) { + size = entry->size - pos; + size = min(count, size); size = entry->c.ops->read(entry, data->file_private_data, - file, buffer, count, pos); + file, buffer, size, pos); + } break; } if ((ssize_t) size > 0) @@ -282,10 +291,13 @@ static ssize_t snd_info_entry_write(struct file *file, const char __user *buffer size = count; break; case SNDRV_INFO_CONTENT_DATA: - if (entry->c.ops->write) + if (entry->c.ops->write && count > 0) { + size_t maxsize = entry->size - pos; + count = min(count, maxsize); size = entry->c.ops->write(entry, data->file_private_data, file, buffer, count, pos); + } break; } if ((ssize_t) size > 0) diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c index 54e2eb5..f50ebf2 100644 --- a/sound/core/oss/mixer_oss.c +++ b/sound/core/oss/mixer_oss.c @@ -43,6 +43,10 @@ static int snd_mixer_oss_open(struct inode *inode, struct file *file) struct snd_mixer_oss_file *fmixer; int err; + err = nonseekable_open(inode, file); + if (err < 0) + return err; + card = snd_lookup_oss_minor_data(iminor(inode), SNDRV_OSS_DEVICE_TYPE_MIXER); if (card == NULL) @@ -397,6 +401,7 @@ static const struct file_operations snd_mixer_oss_f_ops = .owner = THIS_MODULE, .open = snd_mixer_oss_open, .release = snd_mixer_oss_release, + .llseek = no_llseek, .unlocked_ioctl = snd_mixer_oss_ioctl, .compat_ioctl = snd_mixer_oss_ioctl_compat, }; diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index 82d4e33..5c8c7df 100644 --- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -2379,6 +2379,10 @@ static int snd_pcm_oss_open(struct inode *inode, struct file *file) int nonblock; wait_queue_t wait; + err = nonseekable_open(inode, file); + if (err < 0) + return err; + pcm = snd_lookup_oss_minor_data(iminor(inode), SNDRV_OSS_DEVICE_TYPE_PCM); if (pcm == NULL) { @@ -2977,6 +2981,7 @@ static const struct file_operations snd_pcm_oss_f_reg = .write = snd_pcm_oss_write, .open = snd_pcm_oss_open, .release = snd_pcm_oss_release, + .llseek = no_llseek, .poll = snd_pcm_oss_poll, .unlocked_ioctl = snd_pcm_oss_ioctl, .compat_ioctl = snd_pcm_oss_ioctl_compat, diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 20b5982..b9517f3 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -2110,7 +2110,9 @@ static int snd_pcm_open_file(struct file *file, static int snd_pcm_playback_open(struct inode *inode, struct file *file) { struct snd_pcm *pcm; - + int err = nonseekable_open(inode, file); + if (err < 0) + return err; pcm = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_PCM_PLAYBACK); return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); @@ -2119,7 +2121,9 @@ static int snd_pcm_playback_open(struct inode *inode, struct file *file) static int snd_pcm_capture_open(struct inode *inode, struct file *file) { struct snd_pcm *pcm; - + int err = nonseekable_open(inode, file); + if (err < 0) + return err; pcm = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_PCM_CAPTURE); return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); @@ -3310,18 +3314,13 @@ static int snd_pcm_fasync(int fd, struct file * file, int on) struct snd_pcm_file * pcm_file; struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; - int err = -ENXIO; - lock_kernel(); pcm_file = file->private_data; substream = pcm_file->substream; if (PCM_RUNTIME_CHECK(substream)) - goto out; + return -ENXIO; runtime = substream->runtime; - err = fasync_helper(fd, file, on, &runtime->fasync); -out: - unlock_kernel(); - return err; + return fasync_helper(fd, file, on, &runtime->fasync); } /* @@ -3462,6 +3461,7 @@ const struct file_operations snd_pcm_f_ops[2] = { .aio_write = snd_pcm_aio_write, .open = snd_pcm_playback_open, .release = snd_pcm_release, + .llseek = no_llseek, .poll = snd_pcm_playback_poll, .unlocked_ioctl = snd_pcm_playback_ioctl, .compat_ioctl = snd_pcm_ioctl_compat, @@ -3475,6 +3475,7 @@ const struct file_operations snd_pcm_f_ops[2] = { .aio_read = snd_pcm_aio_read, .open = snd_pcm_capture_open, .release = snd_pcm_release, + .llseek = no_llseek, .poll = snd_pcm_capture_poll, .unlocked_ioctl = snd_pcm_capture_ioctl, .compat_ioctl = snd_pcm_ioctl_compat, diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 0f5a194..eb68326 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -376,6 +376,10 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file) if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) return -EINVAL; /* invalid combination */ + err = nonseekable_open(inode, file); + if (err < 0) + return err; + if (maj == snd_major) { rmidi = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_RAWMIDI); @@ -1391,6 +1395,7 @@ static const struct file_operations snd_rawmidi_f_ops = .write = snd_rawmidi_write, .open = snd_rawmidi_open, .release = snd_rawmidi_release, + .llseek = no_llseek, .poll = snd_rawmidi_poll, .unlocked_ioctl = snd_rawmidi_ioctl, .compat_ioctl = snd_rawmidi_ioctl_compat, diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 48eca9f..99a485f 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -318,6 +318,11 @@ 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(®ister_mutex)) return -ERESTARTSYS; @@ -2550,6 +2555,7 @@ static const struct file_operations snd_seq_f_ops = .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, diff --git a/sound/core/sound.c b/sound/core/sound.c index 563d196..ac42af4 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -120,7 +120,29 @@ void *snd_lookup_minor_data(unsigned int minor, int type) EXPORT_SYMBOL(snd_lookup_minor_data); -static int __snd_open(struct inode *inode, struct file *file) +#ifdef CONFIG_MODULES +static struct snd_minor *autoload_device(unsigned int minor) +{ + int dev; + mutex_unlock(&sound_mutex); /* release lock temporarily */ + dev = SNDRV_MINOR_DEVICE(minor); + if (dev == SNDRV_MINOR_CONTROL) { + /* /dev/aloadC? */ + int card = SNDRV_MINOR_CARD(minor); + if (snd_cards[card] == NULL) + snd_request_card(card); + } else if (dev == SNDRV_MINOR_GLOBAL) { + /* /dev/aloadSEQ */ + snd_request_other(minor); + } + mutex_lock(&sound_mutex); /* reacuire lock */ + return snd_minors[minor]; +} +#else /* !CONFIG_MODULES */ +#define autoload_device(minor) NULL +#endif /* CONFIG_MODULES */ + +static int snd_open(struct inode *inode, struct file *file) { unsigned int minor = iminor(inode); struct snd_minor *mptr = NULL; @@ -129,55 +151,36 @@ static int __snd_open(struct inode *inode, struct file *file) if (minor >= ARRAY_SIZE(snd_minors)) return -ENODEV; + mutex_lock(&sound_mutex); mptr = snd_minors[minor]; if (mptr == NULL) { -#ifdef CONFIG_MODULES - int dev = SNDRV_MINOR_DEVICE(minor); - if (dev == SNDRV_MINOR_CONTROL) { - /* /dev/aloadC? */ - int card = SNDRV_MINOR_CARD(minor); - if (snd_cards[card] == NULL) - snd_request_card(card); - } else if (dev == SNDRV_MINOR_GLOBAL) { - /* /dev/aloadSEQ */ - snd_request_other(minor); - } -#ifndef CONFIG_SND_DYNAMIC_MINORS - /* /dev/snd/{controlC?,seq} */ - mptr = snd_minors[minor]; - if (mptr == NULL) -#endif -#endif + mptr = autoload_device(minor); + if (!mptr) { + mutex_unlock(&sound_mutex); return -ENODEV; + } } old_fops = file->f_op; file->f_op = fops_get(mptr->f_ops); if (file->f_op == NULL) { file->f_op = old_fops; - return -ENODEV; + err = -ENODEV; } - if (file->f_op->open) + mutex_unlock(&sound_mutex); + if (err < 0) + return err; + + if (file->f_op->open) { err = file->f_op->open(inode, file); - if (err) { - fops_put(file->f_op); - file->f_op = fops_get(old_fops); + if (err) { + fops_put(file->f_op); + file->f_op = fops_get(old_fops); + } } fops_put(old_fops); return err; } - -/* BKL pushdown: nasty #ifdef avoidance wrapper */ -static int snd_open(struct inode *inode, struct file *file) -{ - int ret; - - lock_kernel(); - ret = __snd_open(inode, file); - unlock_kernel(); - return ret; -} - static const struct file_operations snd_fops = { .owner = THIS_MODULE, diff --git a/sound/core/timer.c b/sound/core/timer.c index 5040c7b..13afb60 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -1238,6 +1238,11 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, static int snd_timer_user_open(struct inode *inode, struct file *file) { struct snd_timer_user *tu; + int err; + + err = nonseekable_open(inode, file); + if (err < 0) + return err; tu = kzalloc(sizeof(*tu), GFP_KERNEL); if (tu == NULL) @@ -1922,6 +1927,7 @@ static const struct file_operations snd_timer_f_ops = .read = snd_timer_user_read, .open = snd_timer_user_open, .release = snd_timer_user_release, + .llseek = no_llseek, .poll = snd_timer_user_poll, .unlocked_ioctl = snd_timer_user_ioctl, .compat_ioctl = snd_timer_user_ioctl_compat, |