/* * NBD Internal Declarations * * Copyright (C) 2016 Red Hat, Inc. * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #ifndef NBD_INTERNAL_H #define NBD_INTERNAL_H #include "block/nbd.h" #include "sysemu/block-backend.h" #include "io/channel-tls.h" #include "qemu/coroutine.h" #include "qemu/iov.h" #ifndef _WIN32 #include <sys/ioctl.h> #endif #if defined(__sun__) || defined(__HAIKU__) #include <sys/ioccom.h> #endif #ifdef __linux__ #include <linux/fs.h> #endif #include "qemu/bswap.h" #include "qemu/queue.h" #include "qemu/main-loop.h" /* This is all part of the "official" NBD API. * * The most up-to-date documentation is available at: * https://github.com/yoe/nbd/blob/master/doc/proto.md */ /* Size of all NBD_OPT_*, without payload */ #define NBD_REQUEST_SIZE (4 + 2 + 2 + 8 + 8 + 4) /* Size of all NBD_REP_* sent in answer to most NBD_OPT_*, without payload */ #define NBD_REPLY_SIZE (4 + 4 + 8) /* Size of reply to NBD_OPT_EXPORT_NAME */ #define NBD_REPLY_EXPORT_NAME_SIZE (8 + 2 + 124) /* Size of oldstyle negotiation */ #define NBD_OLDSTYLE_NEGOTIATE_SIZE (8 + 8 + 8 + 4 + 124) #define NBD_INIT_MAGIC 0x4e42444d41474943LL /* ASCII "NBDMAGIC" */ #define NBD_REQUEST_MAGIC 0x25609513 #define NBD_OPTS_MAGIC 0x49484156454F5054LL /* ASCII "IHAVEOPT" */ #define NBD_CLIENT_MAGIC 0x0000420281861253LL #define NBD_REP_MAGIC 0x0003e889045565a9LL #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) /* nbd_write * Writes @size bytes to @ioc. Returns 0 on success. */ static inline int nbd_write(QIOChannel *ioc, const void *buffer, size_t size, Error **errp) { return qio_channel_write_all(ioc, buffer, size, errp) < 0 ? -EIO : 0; } struct NBDTLSHandshakeData { GMainLoop *loop; bool complete; Error *error; }; void nbd_tls_handshake(QIOTask *task, void *opaque); int nbd_drop(QIOChannel *ioc, size_t size, Error **errp); #endif