f53a829bb9
Before this patch, the "opaque" pointer in an NBD BDS points to a BDRVNBDState, which contains an NbdClientSession object, which in turn contains a pointer to the BDS. This pointer may become invalid due to bdrv_swap(), so drop it, and instead pass the BDS directly to the nbd-client.c functions which then retrieve the NbdClientSession object from there. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1423256778-3340-2-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#ifndef NBD_CLIENT_H
|
|
#define NBD_CLIENT_H
|
|
|
|
#include "qemu-common.h"
|
|
#include "block/nbd.h"
|
|
#include "block/block_int.h"
|
|
|
|
/* #define DEBUG_NBD */
|
|
|
|
#if defined(DEBUG_NBD)
|
|
#define logout(fmt, ...) \
|
|
fprintf(stderr, "nbd\t%-24s" fmt, __func__, ##__VA_ARGS__)
|
|
#else
|
|
#define logout(fmt, ...) ((void)0)
|
|
#endif
|
|
|
|
#define MAX_NBD_REQUESTS 16
|
|
|
|
typedef struct NbdClientSession {
|
|
int sock;
|
|
uint32_t nbdflags;
|
|
off_t size;
|
|
size_t blocksize;
|
|
|
|
CoMutex send_mutex;
|
|
CoMutex free_sema;
|
|
Coroutine *send_coroutine;
|
|
int in_flight;
|
|
|
|
Coroutine *recv_coroutine[MAX_NBD_REQUESTS];
|
|
struct nbd_reply reply;
|
|
|
|
bool is_unix;
|
|
} NbdClientSession;
|
|
|
|
NbdClientSession *nbd_get_client_session(BlockDriverState *bs);
|
|
|
|
int nbd_client_init(BlockDriverState *bs, int sock, const char *export_name,
|
|
Error **errp);
|
|
void nbd_client_close(BlockDriverState *bs);
|
|
|
|
int nbd_client_co_discard(BlockDriverState *bs, int64_t sector_num,
|
|
int nb_sectors);
|
|
int nbd_client_co_flush(BlockDriverState *bs);
|
|
int nbd_client_co_writev(BlockDriverState *bs, int64_t sector_num,
|
|
int nb_sectors, QEMUIOVector *qiov);
|
|
int nbd_client_co_readv(BlockDriverState *bs, int64_t sector_num,
|
|
int nb_sectors, QEMUIOVector *qiov);
|
|
|
|
void nbd_client_detach_aio_context(BlockDriverState *bs);
|
|
void nbd_client_attach_aio_context(BlockDriverState *bs,
|
|
AioContext *new_context);
|
|
|
|
#endif /* NBD_CLIENT_H */
|