From 868fec1f8eca7c344fc9ac057b7418331299d9ce Mon Sep 17 00:00:00 2001 From: Lars Müller Date: Sat, 1 Mar 2008 18:30:38 +0000 Subject: Import dnbd* from the former openslx-contrib repo as of revision 92. openslx-contrib is currently read only and will get removed in some days. git-svn-id: http://svn.openslx.org/svn/openslx/contrib/dnbd/trunk@1592 95ad53e4-c205-0410-b2fa-d234c58c8868 --- kernel/queue.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 kernel/queue.h (limited to 'kernel/queue.h') diff --git a/kernel/queue.h b/kernel/queue.h new file mode 100644 index 0000000..f349637 --- /dev/null +++ b/kernel/queue.h @@ -0,0 +1,29 @@ +#ifndef LINUX_DNBD_QUEUE_H +#define LINUX_DNBD_QUEUE_H 1 + +#include +#include +#include +#include + +/* queue structure used for rx_queue and tx_queue */ +struct dnbd_queue { + spinlock_t lock; + struct semaphore sema; + struct list_head head; + wait_queue_head_t waiters; +}; + +typedef struct dnbd_queue dnbd_queue_t; + +/* functions */ +void dnbd_enq_request(dnbd_queue_t * q, struct request *req, int wakeup); +struct request *dnbd_deq_request(dnbd_queue_t * q); +struct request *dnbd_deq_request_handle(dnbd_queue_t * q, uint64_t pos); +struct request *dnbd_try_deq_request(dnbd_queue_t * q); +void dnbd_mark_old_requests(dnbd_queue_t * q); +int dnbd_requeue_requests(dnbd_queue_t * to, dnbd_queue_t * from, unsigned long timeout); +void dnbd_error_old_requests(dnbd_queue_t * q); + + +#endif /* LINUX_QUEUE_H */ -- cgit v1.2.3-55-g7522