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qemu-nbd: introduce NBDExport

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Wrap the common parameters of nbd_trip and nbd_negotiate in a
single opaque struct.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-09-19 14:03:37 +02:00
parent a030b347aa
commit af49bbbe78
3 changed files with 61 additions and 29 deletions
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15
qemu-nbd.c
View file

@ -36,6 +36,7 @@
#define SOCKET_PATH "/var/lock/qemu-nbd-%s"
static int sigterm_wfd;
static NBDExport *exp;
static int verbose;
static char *device;
static char *srcpath;
@ -280,7 +281,6 @@ int main(int argc, char **argv)
int partition = -1;
int ret;
int shared = 1;
uint8_t *data;
fd_set fds;
int *sharing_fds;
int fd;
@ -489,6 +489,7 @@ int main(int argc, char **argv)
err(EXIT_FAILURE, "Could not find partition %d", partition);
}
exp = nbd_export_new(bs, dev_offset, fd_size, nbdflags);
sharing_fds = g_malloc((shared + 1) * sizeof(int));
if (sockpath) {
@ -516,11 +517,6 @@ int main(int argc, char **argv)
max_fd = sharing_fds[0];
nb_fds++;
data = qemu_blockalign(bs, NBD_BUFFER_SIZE);
if (data == NULL) {
errx(EXIT_FAILURE, "Cannot allocate data buffer");
}
do {
FD_ZERO(&fds);
FD_SET(sigterm_fd[0], &fds);
@ -538,8 +534,7 @@ int main(int argc, char **argv)
ret--;
for (i = 1; i < nb_fds && ret; i++) {
if (FD_ISSET(sharing_fds[i], &fds)) {
if (nbd_trip(bs, sharing_fds[i], fd_size, dev_offset,
nbdflags, data) != 0) {
if (nbd_trip(exp, sharing_fds[i]) != 0) {
close(sharing_fds[i]);
nb_fds--;
sharing_fds[i] = sharing_fds[nb_fds];
@ -555,7 +550,7 @@ int main(int argc, char **argv)
(struct sockaddr *)&addr,
&addr_len);
if (sharing_fds[nb_fds] != -1 &&
nbd_negotiate(sharing_fds[nb_fds], fd_size, nbdflags) != -1) {
nbd_negotiate(exp, sharing_fds[nb_fds]) != -1) {
if (sharing_fds[nb_fds] > max_fd)
max_fd = sharing_fds[nb_fds];
nb_fds++;
@ -563,9 +558,9 @@ int main(int argc, char **argv)
}
}
} while (persistent || nb_fds > 1);
qemu_vfree(data);
close(sharing_fds[0]);
nbd_export_close(exp);
g_free(sharing_fds);
if (sockpath) {
unlink(sockpath);