LXR qemu/block/nbd-client.h

   1#ifndef NBD_CLIENT_H
   2#define NBD_CLIENT_H
   3
   4#include "qemu-common.h"
   5#include "block/nbd.h"
   6#include "block/block_int.h"
   7#include "io/channel-socket.h"
   8
   9/* #define DEBUG_NBD */
  10
  11#if defined(DEBUG_NBD)
  12#define logout(fmt, ...) \
  13    fprintf(stderr, "nbd\t%-24s" fmt, __func__, ##__VA_ARGS__)
  14#else
  15#define logout(fmt, ...) ((void)0)
  16#endif
  17
  18#define MAX_NBD_REQUESTS    16
  19
  20typedef struct NbdClientSession {
  21    QIOChannelSocket *sioc; /* The master data channel */
  22    QIOChannel *ioc; /* The current I/O channel which may differ (eg TLS) */
  23    uint16_t nbdflags;
  24    off_t size;
  25
  26    CoMutex send_mutex;
  27    CoMutex free_sema;
  28    Coroutine *send_coroutine;
  29    int in_flight;
  30
  31    Coroutine *recv_coroutine[MAX_NBD_REQUESTS];
  32    struct nbd_reply reply;
  33
  34    bool is_unix;
  35} NbdClientSession;
  36
  37NbdClientSession *nbd_get_client_session(BlockDriverState *bs);
  38
  39int nbd_client_init(BlockDriverState *bs,
  40                    QIOChannelSocket *sock,
  41                    const char *export_name,
  42                    QCryptoTLSCreds *tlscreds,
  43                    const char *hostname,
  44                    Error **errp);
  45void nbd_client_close(BlockDriverState *bs);
  46
  47int nbd_client_co_pdiscard(BlockDriverState *bs, int64_t offset, int count);
  48int nbd_client_co_flush(BlockDriverState *bs);
  49int nbd_client_co_pwritev(BlockDriverState *bs, uint64_t offset,
  50                          uint64_t bytes, QEMUIOVector *qiov, int flags);
  51int nbd_client_co_preadv(BlockDriverState *bs, uint64_t offset,
  52                         uint64_t bytes, QEMUIOVector *qiov, int flags);
  53
  54void nbd_client_detach_aio_context(BlockDriverState *bs);
  55void nbd_client_attach_aio_context(BlockDriverState *bs,
  56                                   AioContext *new_context);
  57
  58#endif /* NBD_CLIENT_H */
  59