diff options
| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2018-10-03 20:02:27 +0300 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2018-10-03 15:48:31 -0500 |
| commit | f5cd0bb5174dcd6e8c160d7992fb89f09f264ef0 (patch) | |
| tree | 4aa9a594c771a186c45ec7e8ebe1f5b64f3aaecc /qemu-nbd.c | |
| parent | f7812df77d7830c6b375066a4e656f3b79232c13 (diff) | |
qemu-nbd: drop old-style negotiation
Use new-style negotiation always, with default "" (empty) export name
if it is not specified with '-x' option.
qemu as client can manage either style since 2.6.0, commit 69b49502d8
For comparison:
nbd 3.10 dropped oldstyle long ago (Mar 2015):
https://github.com/NetworkBlockDevice/nbd/commit/36940193
nbdkit 1.3 switched its default to newstyle (Jan 2018):
https://github.com/libguestfs/nbdkit/commit/b2a8aecc
https://github.com/libguestfs/nbdkit/commit/8158e773
Furthermore, if a client that only speaks oldstyle still needs to
communicate to qemu, nbdkit remains available to perform the
translation between the two protocols.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20181003170228.95973-2-vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: enhance commit message]
Signed-off-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'qemu-nbd.c')
| -rw-r--r-- | qemu-nbd.c | 25 |
1 files changed, 6 insertions, 19 deletions
diff --git a/qemu-nbd.c b/qemu-nbd.c index 66e023f7fa..6aaebe7d93 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -56,7 +56,6 @@ #define MBR_SIZE 512 static NBDExport *exp; -static bool newproto; static int verbose; static char *srcpath; static SocketAddress *saddr; @@ -84,8 +83,8 @@ 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" -" -D, --description=TEXT with -x, also export a human-readable description\n" +" -x, --export-name=NAME expose export by name (default is empty string)\n" +" -D, --description=TEXT export a human-readable description\n" "\n" "Exposing part of the image:\n" " -o, --offset=OFFSET offset into the image\n" @@ -355,8 +354,7 @@ static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc, nb_fds++; nbd_update_server_watch(); - nbd_client_new(newproto ? NULL : exp, cioc, - tlscreds, NULL, nbd_client_closed); + nbd_client_new(NULL, cioc, tlscreds, NULL, nbd_client_closed); } static void nbd_update_server_watch(void) @@ -550,7 +548,7 @@ int main(int argc, char **argv) Error *local_err = NULL; BlockdevDetectZeroesOptions detect_zeroes = BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; QDict *options = NULL; - const char *export_name = NULL; + const char *export_name = ""; /* Default export name */ const char *export_description = NULL; const char *tlscredsid = NULL; bool imageOpts = false; @@ -809,11 +807,6 @@ int main(int argc, char **argv) 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", @@ -1014,14 +1007,8 @@ int main(int argc, char **argv) error_report_err(local_err); exit(EXIT_FAILURE); } - if (export_name) { - nbd_export_set_name(exp, export_name); - nbd_export_set_description(exp, export_description); - newproto = true; - } else if (export_description) { - error_report("Export description requires an export name"); - exit(EXIT_FAILURE); - } + nbd_export_set_name(exp, export_name); + nbd_export_set_description(exp, export_description); if (device) { int ret; |