diff options
Diffstat (limited to 'qemu-nbd.c')
| -rw-r--r-- | qemu-nbd.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/qemu-nbd.c b/qemu-nbd.c index 7e690fff7e..5af6d11e33 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -53,6 +53,7 @@ static int persistent = 0; static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; static int shared = 1; static int nb_fds; +static int server_fd; static void usage(const char *name) { @@ -340,7 +341,7 @@ out: return (void *) EXIT_FAILURE; } -static int nbd_can_accept(void *opaque) +static int nbd_can_accept(void) { return nb_fds < shared; } @@ -351,19 +352,21 @@ static void nbd_export_closed(NBDExport *exp) state = TERMINATED; } +static void nbd_update_server_fd_handler(int fd); + static void nbd_client_closed(NBDClient *client) { nb_fds--; if (nb_fds == 0 && !persistent && state == RUNNING) { state = TERMINATE; } + nbd_update_server_fd_handler(server_fd); qemu_notify_event(); nbd_client_put(client); } static void nbd_accept(void *opaque) { - int server_fd = (uintptr_t) opaque; struct sockaddr_in addr; socklen_t addr_len = sizeof(addr); @@ -380,12 +383,22 @@ static void nbd_accept(void *opaque) if (nbd_client_new(exp, fd, nbd_client_closed)) { nb_fds++; + nbd_update_server_fd_handler(server_fd); } else { shutdown(fd, 2); close(fd); } } +static void nbd_update_server_fd_handler(int fd) +{ + if (nbd_can_accept()) { + qemu_set_fd_handler(fd, nbd_accept, NULL, (void *)(uintptr_t)fd); + } else { + qemu_set_fd_handler(fd, NULL, NULL, NULL); + } +} + int main(int argc, char **argv) { BlockBackend *blk; @@ -761,8 +774,8 @@ int main(int argc, char **argv) memset(&client_thread, 0, sizeof(client_thread)); } - qemu_set_fd_handler2(fd, nbd_can_accept, nbd_accept, NULL, - (void *)(uintptr_t)fd); + server_fd = fd; + nbd_update_server_fd_handler(fd); /* now when the initialization is (almost) complete, chdir("/") * to free any busy filesystems */ |