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nbd: pass NBDClient to nbd_send_negotiate 

We will need the NBDClient in nbd_send_negotiate to store the
export requested by the client.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-08-22 15:30:31 +02:00
parent fa26c26b07
commit 9a304d29a7
1 changed files with 41 additions and 37 deletions
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78
nbd.c
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@ -78,6 +78,39 @@
#define NBD_OPT_EXPORT_NAME (1 << 0)
/* Definitions for opaque data types */
typedef struct NBDRequest NBDRequest;
struct NBDRequest {
QSIMPLEQ_ENTRY(NBDRequest) entry;
NBDClient *client;
uint8_t *data;
};
struct NBDExport {
BlockDriverState *bs;
off_t dev_offset;
off_t size;
uint32_t nbdflags;
QSIMPLEQ_HEAD(, NBDRequest) requests;
};
struct NBDClient {
int refcount;
void (*close)(NBDClient *client);
NBDExport *exp;
int sock;
Coroutine *recv_coroutine;
CoMutex send_lock;
Coroutine *send_coroutine;
int nb_requests;
};
/* That's all folks */
ssize_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read)
@ -209,8 +242,9 @@ int unix_socket_outgoing(const char *path)
Request (type == 2)
*/
static int nbd_send_negotiate(int csock, off_t size, uint32_t flags)
static int nbd_send_negotiate(NBDClient *client)
{
int csock = client->sock;
char buf[8 + 8 + 8 + 128];
int rc;
@ -228,9 +262,9 @@ static int nbd_send_negotiate(int csock, off_t size, uint32_t flags)
TRACE("Beginning negotiation.");
memcpy(buf, "NBDMAGIC", 8);
cpu_to_be64w((uint64_t*)(buf + 8), NBD_CLIENT_MAGIC);
cpu_to_be64w((uint64_t*)(buf + 16), size);
cpu_to_be64w((uint64_t*)(buf + 16), client->exp->size);
cpu_to_be32w((uint32_t*)(buf + 24),
flags | NBD_FLAG_HAS_FLAGS | NBD_FLAG_SEND_TRIM |
client->exp->nbdflags | NBD_FLAG_HAS_FLAGS | NBD_FLAG_SEND_TRIM |
NBD_FLAG_SEND_FLUSH | NBD_FLAG_SEND_FUA);
memset(buf + 28, 0, 124);
@ -613,37 +647,6 @@ static ssize_t nbd_send_reply(int csock, struct nbd_reply *reply)
#define MAX_NBD_REQUESTS 16
typedef struct NBDRequest NBDRequest;
struct NBDRequest {
QSIMPLEQ_ENTRY(NBDRequest) entry;
NBDClient *client;
uint8_t *data;
};
struct NBDExport {
BlockDriverState *bs;
off_t dev_offset;
off_t size;
uint32_t nbdflags;
QSIMPLEQ_HEAD(, NBDRequest) requests;
};
struct NBDClient {
int refcount;
void (*close)(NBDClient *client);
NBDExport *exp;
int sock;
Coroutine *recv_coroutine;
CoMutex send_lock;
Coroutine *send_coroutine;
int nb_requests;
};
static void nbd_client_get(NBDClient *client)
{
client->refcount++;
@ -977,13 +980,14 @@ NBDClient *nbd_client_new(NBDExport *exp, int csock,
void (*close)(NBDClient *))
{
NBDClient *client;
if (nbd_send_negotiate(csock, exp->size, exp->nbdflags) < 0) {
return NULL;
}
client = g_malloc0(sizeof(NBDClient));
client->refcount = 1;
client->exp = exp;
client->sock = csock;
if (nbd_send_negotiate(client) < 0) {
g_free(client);
return NULL;
}
client->close = close;
qemu_co_mutex_init(&client->send_lock);
qemu_set_fd_handler2(csock, nbd_can_read, nbd_read, NULL, client);