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mirror_qemu
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Merge remote-tracking branch 'bonzini/nbd-for-anthony' into staging 

* bonzini/nbd-for-anthony:
  nbd: add git tree to MAINTAINERS
  open /dev/nbd in nbd_client_thread
  do not chdir(/) in qemu-nbd before opening all files
master
Anthony Liguori 2012-02-17 06:50:58 -06:00
parent 3d7f572140 e5950790cb
commit c77de088b1
2 changed files with 24 additions and 19 deletions
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1
MAINTAINERS
View File

@ -524,6 +524,7 @@ S: Odd Fixes
F: block/nbd.c
F: nbd.*
F: qemu-nbd.c
T: git://github.com/bonzini/qemu.git nbd-next
SLIRP
M: Jan Kiszka <jan.kiszka@siemens.com>

42
qemu-nbd.c
View File

@ -37,7 +37,6 @@
static NBDExport *exp;
static int verbose;
static char *device;
static char *srcpath;
static char *sockpath;
static bool sigterm_reported;
@ -178,6 +177,7 @@ static void termsig_handler(int signum)
static void *show_parts(void *arg)
{
char *device = arg;
int nbd;
/* linux just needs an open() to trigger
@ -194,11 +194,11 @@ static void *show_parts(void *arg)
static void *nbd_client_thread(void *arg)
{
int fd = *(int *)arg;
char *device = arg;
off_t size;
size_t blocksize;
uint32_t nbdflags;
int sock;
int fd, sock;
int ret;
pthread_t show_parts_thread;
@ -213,13 +213,20 @@ static void *nbd_client_thread(void *arg)
goto out;
}
fd = open(device, O_RDWR);
if (fd == -1) {
/* Linux-only, we can use %m in printf. */
fprintf(stderr, "Failed to open %s: %m", device);
goto out;
}
ret = nbd_init(fd, sock, nbdflags, size, blocksize);
if (ret == -1) {
goto out;
}
/* update partition table */
pthread_create(&show_parts_thread, NULL, show_parts, NULL);
pthread_create(&show_parts_thread, NULL, show_parts, device);
if (verbose) {
fprintf(stderr, "NBD device %s is now connected to %s\n",
@ -273,6 +280,7 @@ int main(int argc, char **argv)
uint32_t nbdflags = 0;
bool disconnect = false;
const char *bindto = "0.0.0.0";
char *device = NULL;
int port = NBD_DEFAULT_PORT;
off_t fd_size;
const char *sopt = "hVb:o:p:rsnP:c:dvk:e:t";
@ -429,7 +437,7 @@ int main(int argc, char **argv)
pid = fork();
if (pid == 0) {
close(stderr_fd[0]);
ret = qemu_daemon(0, 0);
ret = qemu_daemon(1, 0);
/* Temporarily redirect stderr to the parent's pipe... */
dup2(stderr_fd[1], STDERR_FILENO);
@ -466,19 +474,9 @@ int main(int argc, char **argv)
}
}
if (device) {
/* Open before spawning new threads. In the future, we may
* drop privileges after opening.
*/
fd = open(device, O_RDWR);
if (fd == -1) {
err(EXIT_FAILURE, "Failed to open %s", device);
}
if (sockpath == NULL) {
sockpath = g_malloc(128);
snprintf(sockpath, 128, SOCKET_PATH, basename(device));
}
if (device != NULL && sockpath == NULL) {
sockpath = g_malloc(128);
snprintf(sockpath, 128, SOCKET_PATH, basename(device));
}
bdrv_init();
@ -513,7 +511,7 @@ int main(int argc, char **argv)
if (device) {
int ret;
ret = pthread_create(&client_thread, NULL, nbd_client_thread, &fd);
ret = pthread_create(&client_thread, NULL, nbd_client_thread, device);
if (ret != 0) {
errx(EXIT_FAILURE, "Failed to create client thread: %s",
strerror(ret));
@ -527,6 +525,12 @@ int main(int argc, char **argv)
qemu_set_fd_handler2(fd, nbd_can_accept, nbd_accept, NULL,
(void *)(uintptr_t)fd);
/* now when the initialization is (almost) complete, chdir("/")
* to free any busy filesystems */
if (chdir("/") < 0) {
err(EXIT_FAILURE, "Could not chdir to root directory");
}
do {
main_loop_wait(false);
} while (!sigterm_reported && (persistent || !nbd_started || nb_fds > 0));