* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
+#include "qemu/osdep.h"
+#include "qapi/error.h"
#include "qemu-common.h"
+#include "qemu/cutils.h"
#include "sysemu/block-backend.h"
#include "block/block_int.h"
#include "block/nbd.h"
#include "qemu/main-loop.h"
-#include "qemu/sockets.h"
#include "qemu/error-report.h"
+#include "qemu/config-file.h"
+#include "qemu/bswap.h"
+#include "qemu/log.h"
#include "block/snapshot.h"
#include "qapi/util.h"
#include "qapi/qmp/qstring.h"
+#include "qom/object_interfaces.h"
+#include "io/channel-socket.h"
+#include "crypto/init.h"
+#include "trace/control.h"
-#include <stdarg.h>
-#include <stdio.h>
#include <getopt.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#include <signal.h>
#include <libgen.h>
#include <pthread.h>
#define SOCKET_PATH "/var/lock/qemu-nbd-%s"
-#define QEMU_NBD_OPT_CACHE 1
-#define QEMU_NBD_OPT_AIO 2
-#define QEMU_NBD_OPT_DISCARD 3
-#define QEMU_NBD_OPT_DETECT_ZEROES 4
+#define QEMU_NBD_OPT_CACHE 256
+#define QEMU_NBD_OPT_AIO 257
+#define QEMU_NBD_OPT_DISCARD 258
+#define QEMU_NBD_OPT_DETECT_ZEROES 259
+#define QEMU_NBD_OPT_OBJECT 260
+#define QEMU_NBD_OPT_TLSCREDS 261
+#define QEMU_NBD_OPT_IMAGE_OPTS 262
+
+#define MBR_SIZE 512
static NBDExport *exp;
+static bool newproto;
static int verbose;
static char *srcpath;
static SocketAddress *saddr;
static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state;
static int shared = 1;
static int nb_fds;
-static int server_fd;
+static QIOChannelSocket *server_ioc;
+static int server_watch = -1;
+static QCryptoTLSCreds *tlscreds;
static void usage(const char *name)
{
" -e, --shared=NUM device can be shared by NUM clients (default '1')\n"
" -t, --persistent don't exit on the last connection\n"
" -v, --verbose display extra debugging information\n"
+" -x, --export-name=NAME expose export by name\n"
"\n"
"Exposing part of the image:\n"
" -o, --offset=OFFSET offset into the image\n"
" -P, --partition=NUM only expose partition NUM\n"
"\n"
+"General purpose options:\n"
+" --object type,id=ID,... define an object such as 'secret' for providing\n"
+" passwords and/or encryption keys\n"
+" -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
+" specify tracing options\n"
#ifdef __linux__
"Kernel NBD client support:\n"
" -c, --connect=DEV connect FILE to the local NBD device DEV\n"
" --aio=MODE set AIO mode (native or threads)\n"
" --discard=MODE set discard mode (ignore, unmap)\n"
" --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n"
+" --image-opts treat FILE as a full set of image options\n"
"\n"
"Report bugs to <qemu-devel@nongnu.org>\n"
, name, NBD_DEFAULT_PORT, "DEVICE");
r->end_cylinder = p[7] | ((p[6] << 2) & 0x300);
r->end_sector = p[6] & 0x3f;
- r->start_sector_abs = le32_to_cpup((uint32_t *)(p + 8));
- r->nb_sectors_abs = le32_to_cpup((uint32_t *)(p + 12));
+ r->start_sector_abs = ldl_le_p(p + 8);
+ r->nb_sectors_abs = ldl_le_p(p + 12);
}
static int find_partition(BlockBackend *blk, int partition,
off_t *offset, off_t *size)
{
struct partition_record mbr[4];
- uint8_t data[512];
+ uint8_t data[MBR_SIZE];
int i;
int ext_partnum = 4;
int ret;
- if ((ret = blk_read(blk, 0, data, 1)) < 0) {
- errno = -ret;
- error_report("error while reading: %s", strerror(errno));
+ ret = blk_pread(blk, 0, data, sizeof(data));
+ if (ret < 0) {
+ error_report("error while reading: %s", strerror(-ret));
exit(EXIT_FAILURE);
}
if (mbr[i].system == 0xF || mbr[i].system == 0x5) {
struct partition_record ext[4];
- uint8_t data1[512];
+ uint8_t data1[MBR_SIZE];
int j;
- if ((ret = blk_read(blk, mbr[i].start_sector_abs, data1, 1)) < 0) {
- errno = -ret;
- error_report("error while reading: %s", strerror(errno));
+ ret = blk_pread(blk, mbr[i].start_sector_abs * MBR_SIZE,
+ data1, sizeof(data1));
+ if (ret < 0) {
+ error_report("error while reading: %s", strerror(-ret));
exit(EXIT_FAILURE);
}
static void termsig_handler(int signum)
{
- state = TERMINATE;
+ atomic_cmpxchg(&state, RUNNING, TERMINATE);
qemu_notify_event();
}
{
char *device = arg;
off_t size;
- uint32_t nbdflags;
- int fd, sock;
+ uint16_t nbdflags;
+ QIOChannelSocket *sioc;
+ int fd;
int ret;
pthread_t show_parts_thread;
Error *local_error = NULL;
-
- sock = socket_connect(saddr, &local_error, NULL, NULL);
- if (sock < 0) {
+ sioc = qio_channel_socket_new();
+ if (qio_channel_socket_connect_sync(sioc,
+ saddr,
+ &local_error) < 0) {
error_report_err(local_error);
goto out;
}
- ret = nbd_receive_negotiate(sock, NULL, &nbdflags,
+ ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), NULL, &nbdflags,
+ NULL, NULL, NULL,
&size, &local_error);
if (ret < 0) {
if (local_error) {
fd = open(device, O_RDWR);
if (fd < 0) {
/* Linux-only, we can use %m in printf. */
- fprintf(stderr, "Failed to open %s: %m\n", device);
+ error_report("Failed to open %s: %m", device);
goto out_socket;
}
- ret = nbd_init(fd, sock, nbdflags, size);
+ ret = nbd_init(fd, sioc, nbdflags, size);
if (ret < 0) {
goto out_fd;
}
goto out_fd;
}
close(fd);
+ object_unref(OBJECT(sioc));
kill(getpid(), SIGTERM);
return (void *) EXIT_SUCCESS;
out_fd:
close(fd);
out_socket:
- closesocket(sock);
+ object_unref(OBJECT(sioc));
out:
kill(getpid(), SIGTERM);
return (void *) EXIT_FAILURE;
state = TERMINATED;
}
-static void nbd_update_server_fd_handler(int fd);
+static void nbd_update_server_watch(void);
static void nbd_client_closed(NBDClient *client)
{
if (nb_fds == 0 && !persistent && state == RUNNING) {
state = TERMINATE;
}
- nbd_update_server_fd_handler(server_fd);
+ nbd_update_server_watch();
nbd_client_put(client);
}
-static void nbd_accept(void *opaque)
+static gboolean nbd_accept(QIOChannel *ioc, GIOCondition cond, gpointer opaque)
{
- struct sockaddr_in addr;
- socklen_t addr_len = sizeof(addr);
+ QIOChannelSocket *cioc;
- int fd = accept(server_fd, (struct sockaddr *)&addr, &addr_len);
- if (fd < 0) {
- perror("accept");
- return;
+ cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc),
+ NULL);
+ if (!cioc) {
+ return TRUE;
}
if (state >= TERMINATE) {
- close(fd);
- return;
+ object_unref(OBJECT(cioc));
+ return TRUE;
}
- if (nbd_client_new(exp, fd, nbd_client_closed)) {
- nb_fds++;
- nbd_update_server_fd_handler(server_fd);
- } else {
- shutdown(fd, 2);
- close(fd);
- }
+ nb_fds++;
+ nbd_update_server_watch();
+ nbd_client_new(newproto ? NULL : exp, cioc,
+ tlscreds, NULL, nbd_client_closed);
+ object_unref(OBJECT(cioc));
+
+ return TRUE;
}
-static void nbd_update_server_fd_handler(int fd)
+static void nbd_update_server_watch(void)
{
if (nbd_can_accept()) {
- qemu_set_fd_handler(fd, nbd_accept, NULL, (void *)(uintptr_t)fd);
+ if (server_watch == -1) {
+ server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc),
+ G_IO_IN,
+ nbd_accept,
+ NULL, NULL);
+ }
} else {
- qemu_set_fd_handler(fd, NULL, NULL, NULL);
+ if (server_watch != -1) {
+ g_source_remove(server_watch);
+ server_watch = -1;
+ }
}
}
saddr = g_new0(SocketAddress, 1);
if (sockpath) {
saddr->type = SOCKET_ADDRESS_KIND_UNIX;
- saddr->u.q_unix = g_new0(UnixSocketAddress, 1);
- saddr->u.q_unix->path = g_strdup(sockpath);
+ saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
+ saddr->u.q_unix.data->path = g_strdup(sockpath);
} else {
+ InetSocketAddress *inet;
saddr->type = SOCKET_ADDRESS_KIND_INET;
- saddr->u.inet = g_new0(InetSocketAddress, 1);
- saddr->u.inet->host = g_strdup(bindto);
+ inet = saddr->u.inet.data = g_new0(InetSocketAddress, 1);
+ inet->host = g_strdup(bindto);
if (port) {
- saddr->u.inet->port = g_strdup(port);
+ inet->port = g_strdup(port);
} else {
- saddr->u.inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT);
+ inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT);
}
}
}
+static QemuOptsList file_opts = {
+ .name = "file",
+ .implied_opt_name = "file",
+ .head = QTAILQ_HEAD_INITIALIZER(file_opts.head),
+ .desc = {
+ /* no elements => accept any params */
+ { /* end of list */ }
+ },
+};
+
+static QemuOptsList qemu_object_opts = {
+ .name = "object",
+ .implied_opt_name = "qom-type",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head),
+ .desc = {
+ { }
+ },
+};
+
+
+
+static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp)
+{
+ Object *obj;
+ QCryptoTLSCreds *creds;
+
+ obj = object_resolve_path_component(
+ object_get_objects_root(), id);
+ if (!obj) {
+ error_setg(errp, "No TLS credentials with id '%s'",
+ id);
+ return NULL;
+ }
+ creds = (QCryptoTLSCreds *)
+ object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS);
+ if (!creds) {
+ error_setg(errp, "Object with id '%s' is not TLS credentials",
+ id);
+ return NULL;
+ }
+
+ if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
+ error_setg(errp,
+ "Expecting TLS credentials with a server endpoint");
+ return NULL;
+ }
+ object_ref(obj);
+ return creds;
+}
+
+
int main(int argc, char **argv)
{
BlockBackend *blk;
BlockDriverState *bs;
off_t dev_offset = 0;
- uint32_t nbdflags = 0;
+ uint16_t nbdflags = 0;
bool disconnect = false;
const char *bindto = "0.0.0.0";
const char *port = NULL;
off_t fd_size;
QemuOpts *sn_opts = NULL;
const char *sn_id_or_name = NULL;
- const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:";
+ const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:";
struct option lopt[] = {
- { "help", 0, NULL, 'h' },
- { "version", 0, NULL, 'V' },
- { "bind", 1, NULL, 'b' },
- { "port", 1, NULL, 'p' },
- { "socket", 1, NULL, 'k' },
- { "offset", 1, NULL, 'o' },
- { "read-only", 0, NULL, 'r' },
- { "partition", 1, NULL, 'P' },
- { "connect", 1, NULL, 'c' },
- { "disconnect", 0, NULL, 'd' },
- { "snapshot", 0, NULL, 's' },
- { "load-snapshot", 1, NULL, 'l' },
- { "nocache", 0, NULL, 'n' },
- { "cache", 1, NULL, QEMU_NBD_OPT_CACHE },
- { "aio", 1, NULL, QEMU_NBD_OPT_AIO },
- { "discard", 1, NULL, QEMU_NBD_OPT_DISCARD },
- { "detect-zeroes", 1, NULL, QEMU_NBD_OPT_DETECT_ZEROES },
- { "shared", 1, NULL, 'e' },
- { "format", 1, NULL, 'f' },
- { "persistent", 0, NULL, 't' },
- { "verbose", 0, NULL, 'v' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'V' },
+ { "bind", required_argument, NULL, 'b' },
+ { "port", required_argument, NULL, 'p' },
+ { "socket", required_argument, NULL, 'k' },
+ { "offset", required_argument, NULL, 'o' },
+ { "read-only", no_argument, NULL, 'r' },
+ { "partition", required_argument, NULL, 'P' },
+ { "connect", required_argument, NULL, 'c' },
+ { "disconnect", no_argument, NULL, 'd' },
+ { "snapshot", no_argument, NULL, 's' },
+ { "load-snapshot", required_argument, NULL, 'l' },
+ { "nocache", no_argument, NULL, 'n' },
+ { "cache", required_argument, NULL, QEMU_NBD_OPT_CACHE },
+ { "aio", required_argument, NULL, QEMU_NBD_OPT_AIO },
+ { "discard", required_argument, NULL, QEMU_NBD_OPT_DISCARD },
+ { "detect-zeroes", required_argument, NULL,
+ QEMU_NBD_OPT_DETECT_ZEROES },
+ { "shared", required_argument, NULL, 'e' },
+ { "format", required_argument, NULL, 'f' },
+ { "persistent", no_argument, NULL, 't' },
+ { "verbose", no_argument, NULL, 'v' },
+ { "object", required_argument, NULL, QEMU_NBD_OPT_OBJECT },
+ { "export-name", required_argument, NULL, 'x' },
+ { "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS },
+ { "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS },
+ { "trace", required_argument, NULL, 'T' },
{ NULL, 0, NULL, 0 }
};
int ch;
int flags = BDRV_O_RDWR;
int partition = -1;
int ret = 0;
- int fd;
bool seen_cache = false;
bool seen_discard = false;
bool seen_aio = false;
Error *local_err = NULL;
BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
QDict *options = NULL;
+ const char *export_name = NULL;
+ const char *tlscredsid = NULL;
+ bool imageOpts = false;
+ bool writethrough = true;
+ char *trace_file = NULL;
/* The client thread uses SIGTERM to interrupt the server. A signal
* handler ensures that "qemu-nbd -v -c" exits with a nice status code.
memset(&sa_sigterm, 0, sizeof(sa_sigterm));
sa_sigterm.sa_handler = termsig_handler;
sigaction(SIGTERM, &sa_sigterm, NULL);
+
+ qcrypto_init(&error_fatal);
+
+ module_call_init(MODULE_INIT_QOM);
+ qemu_add_opts(&qemu_object_opts);
+ qemu_add_opts(&qemu_trace_opts);
qemu_init_exec_dir(argv[0]);
while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
exit(EXIT_FAILURE);
}
seen_cache = true;
- if (bdrv_parse_cache_flags(optarg, &flags) == -1) {
+ if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) == -1) {
error_report("Invalid cache mode `%s'", optarg);
exit(EXIT_FAILURE);
}
BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
&local_err);
if (local_err) {
- error_report("Failed to parse detect_zeroes mode: %s",
- error_get_pretty(local_err));
+ error_reportf_err(local_err,
+ "Failed to parse detect_zeroes mode: ");
exit(EXIT_FAILURE);
}
if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
case 'k':
sockpath = optarg;
if (sockpath[0] != '/') {
- error_report("socket path must be absolute\n");
+ error_report("socket path must be absolute");
exit(EXIT_FAILURE);
}
break;
exit(EXIT_FAILURE);
}
if (shared < 1) {
- error_report("Shared device number must be greater than 0\n");
+ error_report("Shared device number must be greater than 0");
exit(EXIT_FAILURE);
}
break;
case 't':
persistent = 1;
break;
+ case 'x':
+ export_name = optarg;
+ break;
case 'v':
verbose = 1;
break;
case '?':
error_report("Try `%s --help' for more information.", argv[0]);
exit(EXIT_FAILURE);
+ case QEMU_NBD_OPT_OBJECT: {
+ QemuOpts *opts;
+ opts = qemu_opts_parse_noisily(&qemu_object_opts,
+ optarg, true);
+ if (!opts) {
+ exit(EXIT_FAILURE);
+ }
+ } break;
+ case QEMU_NBD_OPT_TLSCREDS:
+ tlscredsid = optarg;
+ break;
+ case QEMU_NBD_OPT_IMAGE_OPTS:
+ imageOpts = true;
+ break;
+ case 'T':
+ g_free(trace_file);
+ trace_file = trace_opt_parse(optarg);
+ break;
}
}
if ((argc - optind) != 1) {
- error_report("Invalid number of argument.\n"
- "Try `%s --help' for more information.",
- argv[0]);
+ error_report("Invalid number of arguments");
+ error_printf("Try `%s --help' for more information.\n", argv[0]);
exit(EXIT_FAILURE);
}
+ if (qemu_opts_foreach(&qemu_object_opts,
+ user_creatable_add_opts_foreach,
+ NULL, NULL)) {
+ exit(EXIT_FAILURE);
+ }
+
+ if (!trace_init_backends()) {
+ exit(1);
+ }
+ trace_init_file(trace_file);
+ qemu_set_log(LOG_TRACE);
+
+ if (tlscredsid) {
+ if (sockpath) {
+ error_report("TLS is only supported with IPv4/IPv6");
+ exit(EXIT_FAILURE);
+ }
+ if (device) {
+ error_report("TLS is not supported with a host device");
+ exit(EXIT_FAILURE);
+ }
+ if (!export_name) {
+ /* Set the default NBD protocol export name, since
+ * we *must* use new style protocol for TLS */
+ export_name = "";
+ }
+ tlscreds = nbd_get_tls_creds(tlscredsid, &local_err);
+ if (local_err) {
+ error_report("Failed to get TLS creds %s",
+ error_get_pretty(local_err));
+ exit(EXIT_FAILURE);
+ }
+ }
+
if (disconnect) {
- fd = open(argv[optind], O_RDWR);
- if (fd < 0) {
+ int nbdfd = open(argv[optind], O_RDWR);
+ if (nbdfd < 0) {
error_report("Cannot open %s: %s", argv[optind],
strerror(errno));
exit(EXIT_FAILURE);
}
- nbd_disconnect(fd);
+ nbd_disconnect(nbdfd);
- close(fd);
+ close(nbdfd);
printf("%s disconnected\n", argv[optind]);
bdrv_init();
atexit(bdrv_close_all);
- if (fmt) {
- options = qdict_new();
- qdict_put(options, "driver", qstring_from_str(fmt));
+ srcpath = argv[optind];
+ if (imageOpts) {
+ QemuOpts *opts;
+ if (fmt) {
+ error_report("--image-opts and -f are mutually exclusive");
+ exit(EXIT_FAILURE);
+ }
+ opts = qemu_opts_parse_noisily(&file_opts, srcpath, true);
+ if (!opts) {
+ qemu_opts_reset(&file_opts);
+ exit(EXIT_FAILURE);
+ }
+ options = qemu_opts_to_qdict(opts, NULL);
+ qemu_opts_reset(&file_opts);
+ blk = blk_new_open(NULL, NULL, options, flags, &local_err);
+ } else {
+ if (fmt) {
+ options = qdict_new();
+ qdict_put(options, "driver", qstring_from_str(fmt));
+ }
+ blk = blk_new_open(srcpath, NULL, options, flags, &local_err);
}
- srcpath = argv[optind];
- blk = blk_new_open("hda", srcpath, NULL, options, flags, &local_err);
if (!blk) {
- error_report("Failed to blk_new_open '%s': %s", argv[optind],
- error_get_pretty(local_err));
+ error_reportf_err(local_err, "Failed to blk_new_open '%s': ",
+ argv[optind]);
exit(EXIT_FAILURE);
}
bs = blk_bs(blk);
+ blk_set_enable_write_cache(blk, !writethrough);
+
if (sn_opts) {
ret = bdrv_snapshot_load_tmp(bs,
qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID),
&local_err);
}
if (ret < 0) {
- errno = -ret;
- error_report("Failed to load snapshot: %s: %s",
- error_get_pretty(local_err), strerror(errno));
+ error_reportf_err(local_err, "Failed to load snapshot: ");
exit(EXIT_FAILURE);
}
if (partition != -1) {
ret = find_partition(blk, partition, &dev_offset, &fd_size);
if (ret < 0) {
- errno = -ret;
error_report("Could not find partition %d: %s", partition,
- strerror(errno));
+ strerror(-ret));
exit(EXIT_FAILURE);
}
}
error_report_err(local_err);
exit(EXIT_FAILURE);
}
+ if (export_name) {
+ nbd_export_set_name(exp, export_name);
+ newproto = true;
+ }
- fd = socket_listen(saddr, &local_err);
- if (fd < 0) {
+ server_ioc = qio_channel_socket_new();
+ if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) {
+ object_unref(OBJECT(server_ioc));
error_report_err(local_err);
return 1;
}
memset(&client_thread, 0, sizeof(client_thread));
}
- server_fd = fd;
- nbd_update_server_fd_handler(fd);
+ nbd_update_server_watch();
/* now when the initialization is (almost) complete, chdir("/")
* to free any busy filesystems */
projects / mirror_qemu.git / blobdiff