#ifndef LINUX_NBD_H
#define LINUX_NBD_H
+#include <linux/types.h>
+
#define NBD_SET_SOCK _IO( 0xab, 0 )
#define NBD_SET_BLKSIZE _IO( 0xab, 1 )
#define NBD_SET_SIZE _IO( 0xab, 2 )
#define NBD_PRINT_DEBUG _IO( 0xab, 6 )
#define NBD_SET_SIZE_BLOCKS _IO( 0xab, 7 )
#define NBD_DISCONNECT _IO( 0xab, 8 )
+#define NBD_SET_TIMEOUT _IO( 0xab, 9 )
enum {
NBD_CMD_READ = 0,
/* userspace doesn't need the nbd_device structure */
#ifdef __KERNEL__
+#include <linux/wait.h>
+#include <linux/mutex.h>
+
/* values for flags field */
#define NBD_READ_ONLY 0x0001
#define NBD_WRITE_NOCHK 0x0002
+struct request;
+
struct nbd_device {
int flags;
int harderror; /* Code of hard error */
struct socket * sock;
struct file * file; /* If == NULL, device is not ready, yet */
int magic;
+
spinlock_t queue_lock;
struct list_head queue_head;/* Requests are added here... */
- struct semaphore tx_lock;
+ struct request *active_req;
+ wait_queue_head_t active_wq;
+
+ struct mutex tx_lock;
struct gendisk *disk;
int blksize;
u64 bytesize;
+ pid_t pid; /* pid of nbd-client, if attached */
+ int xmit_timeout;
};
#endif
* server. All data are in network byte order.
*/
struct nbd_request {
- u32 magic;
- u32 type; /* == READ || == WRITE */
+ __be32 magic;
+ __be32 type; /* == READ || == WRITE */
char handle[8];
- u64 from;
- u32 len;
+ __be64 from;
+ __be32 len;
}
#ifdef __GNUC__
__attribute__ ((packed))
* it has completed an I/O request (or an error occurs).
*/
struct nbd_reply {
- u32 magic;
- u32 error; /* 0 = ok, else error */
+ __be32 magic;
+ __be32 error; /* 0 = ok, else error */
char handle[8]; /* handle you got from request */
};
#endif