Hello,
this is a proposal async I/O notification support for the inotify.
Dmitry
--- .orig-2.6.20-rc4/fs/inotify_user.c 2007-01-12 08:27:10.000000000 +0300
+++ 2.6.20-rc4/fs/inotify_user.c 2007-01-12 09:53:12.000000000 +0300
@@ -72,6 +72,7 @@
*/
struct inotify_device {
wait_queue_head_t wq; /* wait queue for i/o */
+ struct fasync_struct *fasync; /* async i/o notification */
struct mutex ev_mutex; /* protects event queue */
struct mutex up_mutex; /* synchronizes watch updates */
struct list_head events; /* list of queued events */
@@ -301,6 +302,7 @@
dev->queue_size += sizeof(struct inotify_event) + kevent->event.len;
list_add_tail(&kevent->list, &dev->events);
wake_up_interruptible(&dev->wq);
+ kill_fasync(&dev->fasync, SIGIO, POLL_IN);
out:
mutex_unlock(&dev->ev_mutex);
@@ -485,6 +487,7 @@
{
struct inotify_device *dev = file->private_data;
+ fasync_helper(-1, file, 0, &dev->fasync);
inotify_destroy(dev->ih);
/* destroy all of the events on this device */
@@ -518,12 +521,19 @@
return ret;
}
+static int inotify_fasync(int fd, struct file *file, int on)
+{
+ struct inotify_device *dev = file->private_data;
+ return fasync_helper(fd, file, on, &dev->fasync);
+}
+
static const struct file_operations inotify_fops = {
.poll = inotify_poll,
.read = inotify_read,
.release = inotify_release,
.unlocked_ioctl = inotify_ioctl,
.compat_ioctl = inotify_ioctl,
+ .fasync = inotify_fasync,
};
static const struct inotify_operations inotify_user_ops = {
-
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