| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * 1999 Copyright (C) Pavel Machek, [email protected]. This code is GPL. |
| * 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne) |
| * Made nbd_end_request() use the io_request_lock |
| * 2001 Copyright (C) Steven Whitehouse |
| * New nbd_end_request() for compatibility with new linux block |
| * layer code. |
| * 2003/06/24 Louis D. Langholtz <[email protected]> |
| * 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 |
| #define LINUX_NBD_H |
| |
| #include <stdbool.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| //#include <linux/types.h> |
| |
| #if 0 |
| #define NBD_SET_SOCK _IO( 0xab, 0 ) |
| #define NBD_SET_BLKSIZE _IO( 0xab, 1 ) |
| #define NBD_SET_SIZE _IO( 0xab, 2 ) |
| #define NBD_DO_IT _IO( 0xab, 3 ) |
| #define NBD_CLEAR_SOCK _IO( 0xab, 4 ) |
| #define NBD_CLEAR_QUE _IO( 0xab, 5 ) |
| #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 ) |
| #define NBD_SET_FLAGS _IO( 0xab, 10 ) |
| #endif |
| |
| enum { |
| NBD_CMD_READ = 0, |
| NBD_CMD_WRITE = 1, |
| NBD_CMD_DISC = 2, |
| NBD_CMD_FLUSH = 3, |
| NBD_CMD_TRIM = 4, |
| NBD_CMD_CACHE = 5, |
| NBD_CMD_WRITE_ZEROES = 6, |
| NBD_CMD_BLOCK_STATUS = 7, |
| NBD_CMD_RESIZE = 8 |
| }; |
| |
| #define NBD_CMD_MASK_COMMAND 0x0000ffff |
| #define NBD_CMD_SHIFT (16) |
| #define NBD_CMD_FLAG_FUA ((1 << 0) << NBD_CMD_SHIFT) |
| #define NBD_CMD_FLAG_NO_HOLE ((1 << 1) << NBD_CMD_SHIFT) |
| |
| /* values for flags field */ |
| #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_FLAG_SEND_WRITE_ZEROES (1 << 6) /* Send NBD_CMD_WRITE_ZEROES */ |
| #define NBD_FLAG_CAN_MULTI_CONN (1 << 8) /* multiple connections are okay */ |
| |
| /* from libnbd/lib/nbd-protocol.h */ |
| #define NBD_FLAG_SEND_DF (1 << 7) |
| #define NBD_FLAG_SEND_CACHE (1 << 10) |
| #define NBD_FLAG_SEND_FAST_ZERO (1 << 11) |
| |
| #define nbd_cmd(req) ((req)->cmd[0]) |
| |
| /* userspace doesn't need the nbd_device structure */ |
| |
| /* These are sent over the network in the request/reply magic fields */ |
| |
| #define NBD_REQUEST_MAGIC 0x25609513 |
| #define NBD_REPLY_MAGIC 0x67446698 |
| #define NBD_STRUCTURED_REPLY_MAGIC 0x668e33ef |
| |
| /* for the trace log, not part of the protocol, not sent over the wire */ |
| #define NBD_TRACELOG_MAGIC 0x25609514 |
| |
| #define NBD_OPT_REPLY_MAGIC 0x3e889045565a9LL |
| |
| /* |
| * This is the packet used for communication between client and |
| * server. All data are in network byte order. |
| */ |
| struct nbd_request { |
| uint32_t magic; |
| uint32_t type; /* == READ || == WRITE */ |
| char handle[8]; |
| uint64_t from; |
| uint32_t len; |
| } __attribute__ ((packed)); |
| |
| /* |
| * 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 { |
| uint32_t magic; |
| uint32_t error; /* 0 = ok, else error */ |
| char handle[8]; /* handle you got from request */ |
| }; |
| |
| extern int opennet(const char *name, const char* portstr, int sdp); |
| extern int openunix(const char *path); |
| extern void negotiate(int *sockp, u64 *rsize64, uint16_t *flags, char* name, |
| uint32_t needed_flags, uint32_t client_flags, uint32_t do_opts, |
| char *certfile, char *keyfile, char *cacertfile, |
| char *tlshostname, bool tls, bool can_opt_go); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| #endif |
