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nbd: convert to using I/O channels for actual socket I/O

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Now that all callers are converted to use I/O channels for
initial connection setup, it is possible to switch the core
NBD protocol handling core over to use QIOChannel APIs for
actual sockets I/O.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1455129674-17255-7-git-send-email-berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Daniel P. Berrange 2016-02-10 18:41:04 +00:00 • committed by Paolo Bonzini
parent ae39827802
commit 1c778ef729
8 changed files with 180 additions and 151 deletions
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20
include/block/nbd.h
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@ -23,6 +23,7 @@
#include "qemu-common.h"
#include "qemu/option.h"
#include "io/channel-socket.h"
struct nbd_request {
uint32_t magic;
@ -73,12 +74,17 @@ enum {
/* Maximum size of a single READ/WRITE data buffer */
#define NBD_MAX_BUFFER_SIZE (32 * 1024 * 1024)
ssize_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read);
int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags,
ssize_t nbd_wr_syncv(QIOChannel *ioc,
struct iovec *iov,
size_t niov,
size_t offset,
size_t length,
bool do_read);
int nbd_receive_negotiate(QIOChannel *ioc, const char *name, uint32_t *flags,
off_t *size, Error **errp);
int nbd_init(int fd, int csock, uint32_t flags, off_t size);
ssize_t nbd_send_request(int csock, struct nbd_request *request);
ssize_t nbd_receive_reply(int csock, struct nbd_reply *reply);
int nbd_init(int fd, QIOChannelSocket *sioc, uint32_t flags, off_t size);
ssize_t nbd_send_request(QIOChannel *ioc, struct nbd_request *request);
ssize_t nbd_receive_reply(QIOChannel *ioc, struct nbd_reply *reply);
int nbd_client(int fd);
int nbd_disconnect(int fd);
@ -98,7 +104,9 @@ NBDExport *nbd_export_find(const char *name);
void nbd_export_set_name(NBDExport *exp, const char *name);
void nbd_export_close_all(void);
void nbd_client_new(NBDExport *exp, int csock, void (*close_fn)(NBDClient *));
void nbd_client_new(NBDExport *exp,
QIOChannelSocket *sioc,
void (*close)(NBDClient *));
void nbd_client_get(NBDClient *client);
void nbd_client_put(NBDClient *client);