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authorGleb Natapov <glebn@voltaire.com>2005-07-27 14:40:00 -0700
committerRoland Dreier <roland@eddore.topspincom.com>2005-07-27 14:40:00 -0700
commitabdf119b4dad015803819c3d046d20cfbd393e87 (patch)
tree9d0372a7f4a71886696a5d7b6f7583790e1c8d22 /drivers/infiniband/core
parent42b1806d5cfc93bf8c3d7fa6e9e79e4ec860c678 (diff)
[IB/uverbs]: Add O_ASYNC support
Add support for O_ASYNC notifications on userspace verbs completion and asynchronous event file descriptors. Signed-off-by: Gleb Natapov <glebn@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/core')
-rw-r--r--drivers/infiniband/core/uverbs.h1
-rw-r--r--drivers/infiniband/core/uverbs_main.c14
2 files changed, 14 insertions, 1 deletions
diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h
index 57347f1e82c..7696022f9a4 100644
--- a/drivers/infiniband/core/uverbs.h
+++ b/drivers/infiniband/core/uverbs.h
@@ -61,6 +61,7 @@ struct ib_uverbs_event_file {
int fd;
int is_async;
wait_queue_head_t poll_wait;
+ struct fasync_struct *async_queue;
struct list_head event_list;
};
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index fbbe03d8c90..eb99e693dec 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -257,11 +257,19 @@ static void ib_uverbs_event_release(struct ib_uverbs_event_file *file)
spin_unlock_irq(&file->lock);
}
+static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
+{
+ struct ib_uverbs_event_file *file = filp->private_data;
+
+ return fasync_helper(fd, filp, on, &file->async_queue);
+}
+
static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
{
struct ib_uverbs_event_file *file = filp->private_data;
ib_uverbs_event_release(file);
+ ib_uverbs_event_fasync(-1, filp, 0);
kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
return 0;
@@ -276,7 +284,8 @@ static struct file_operations uverbs_event_fops = {
*/
.read = ib_uverbs_event_read,
.poll = ib_uverbs_event_poll,
- .release = ib_uverbs_event_close
+ .release = ib_uverbs_event_close,
+ .fasync = ib_uverbs_event_fasync
};
void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
@@ -296,6 +305,7 @@ void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
spin_unlock_irqrestore(&file->comp_file[0].lock, flags);
wake_up_interruptible(&file->comp_file[0].poll_wait);
+ kill_fasync(&file->comp_file[0].async_queue, SIGIO, POLL_IN);
}
static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
@@ -316,6 +326,7 @@ static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
spin_unlock_irqrestore(&file->async_file.lock, flags);
wake_up_interruptible(&file->async_file.poll_wait);
+ kill_fasync(&file->async_file.async_queue, SIGIO, POLL_IN);
}
void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
@@ -350,6 +361,7 @@ static int ib_uverbs_event_init(struct ib_uverbs_event_file *file,
INIT_LIST_HEAD(&file->event_list);
init_waitqueue_head(&file->poll_wait);
file->uverbs_file = uverbs_file;
+ file->async_queue = NULL;
file->fd = get_unused_fd();
if (file->fd < 0)