diff options
Diffstat (limited to 'nbd.h')
| -rw-r--r-- | nbd.h | 20 |
1 files changed, 16 insertions, 4 deletions
@@ -37,10 +37,22 @@ struct nbd_reply { uint64_t handle; } QEMU_PACKED; +#define NBD_FLAG_HAS_FLAGS (1 << 0) /* Flags are there */ +#define NBD_FLAG_READ_ONLY (1 << 1) /* Device is read-only */ +#define NBD_FLAG_SEND_FLUSH (1 << 2) /* Send FLUSH */ +#define NBD_FLAG_SEND_FUA (1 << 3) /* Send FUA (Force Unit Access) */ +#define NBD_FLAG_ROTATIONAL (1 << 4) /* Use elevator algorithm - rotational media */ +#define NBD_FLAG_SEND_TRIM (1 << 5) /* Send TRIM (discard) */ + +#define NBD_CMD_MASK_COMMAND 0x0000ffff +#define NBD_CMD_FLAG_FUA (1 << 16) + enum { NBD_CMD_READ = 0, NBD_CMD_WRITE = 1, - NBD_CMD_DISC = 2 + NBD_CMD_DISC = 2, + NBD_CMD_FLUSH = 3, + NBD_CMD_TRIM = 4 }; #define NBD_DEFAULT_PORT 10809 @@ -53,14 +65,14 @@ int tcp_socket_incoming_spec(const char *address_and_port); int unix_socket_outgoing(const char *path); int unix_socket_incoming(const char *path); -int nbd_negotiate(int csock, off_t size); +int nbd_negotiate(int csock, off_t size, uint32_t flags); int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags, off_t *size, size_t *blocksize); -int nbd_init(int fd, int csock, off_t size, size_t blocksize); +int nbd_init(int fd, int csock, uint32_t flags, off_t size, size_t blocksize); int nbd_send_request(int csock, struct nbd_request *request); int nbd_receive_reply(int csock, struct nbd_reply *reply); int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset, - off_t *offset, bool readonly, uint8_t *data, int data_size); + off_t *offset, uint32_t nbdflags, uint8_t *data, int data_size); int nbd_client(int fd); int nbd_disconnect(int fd); |