diff options
Diffstat (limited to 'net/nbd-server/files/nbd.h')
| -rw-r--r-- | net/nbd-server/files/nbd.h | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/net/nbd-server/files/nbd.h b/net/nbd-server/files/nbd.h index dcb0228efcae..090e210e98f0 100644 --- a/net/nbd-server/files/nbd.h +++ b/net/nbd-server/files/nbd.h @@ -8,6 +8,8 @@ * 2003/06/24 Louis D. Langholtz <ldl@aros.net> * Removed unneeded blksize_bits field from nbd_device struct. * Cleanup PARANOIA usage & code. + * 2004/02/19 Paul Clements + * Removed PARANOIA, plus various cleanup and comments */ #ifndef LINUX_NBD_H @@ -32,22 +34,19 @@ enum { #define nbd_cmd(req) ((req)->cmd[0]) #define MAX_NBD 128 -/* Define PARANOIA to include extra sanity checking code in here & driver */ -#define PARANOIA - /* userspace doesn't need the nbd_device structure */ #ifdef __KERNEL__ +/* values for flags field */ +#define NBD_READ_ONLY 0x0001 +#define NBD_WRITE_NOCHK 0x0002 + struct nbd_device { int flags; int harderror; /* Code of hard error */ -#define NBD_READ_ONLY 0x0001 -#define NBD_WRITE_NOCHK 0x0002 struct socket * sock; struct file * file; /* If == NULL, device is not ready, yet */ -#ifdef PARANOIA - int magic; /* FIXME: not if debugging is off */ -#endif + int magic; spinlock_t queue_lock; struct list_head queue_head;/* Requests are added here... */ struct semaphore tx_lock; @@ -58,16 +57,14 @@ struct nbd_device { #endif -/* This now IS in some kind of include file... */ - -/* These are send over network in request/reply magic field */ +/* These are sent over the network in the request/reply magic fields */ #define NBD_REQUEST_MAGIC 0x25609513 #define NBD_REPLY_MAGIC 0x67446698 /* Do *not* use magics: 0x12560953 0x96744668. */ /* - * This is packet used for communication between client and + * This is the packet used for communication between client and * server. All data are in network byte order. */ struct nbd_request { @@ -82,6 +79,10 @@ struct nbd_request { #endif ; +/* + * This is the reply packet that nbd-server sends back to the client after + * it has completed an I/O request (or an error occurs). + */ struct nbd_reply { u32 magic; u32 error; /* 0 = ok, else error */ |