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| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2017-07-07 18:29:09 +0300 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2017-07-10 09:57:24 -0500 |
| commit | 1e120ffead85d08d41160065e0d8cf86400b1c9e (patch) | |
| tree | fe44c8769b0005c8c3ea3a14ca90ea56dd4a5d2c | |
| parent | 99c62e70aaa9a3ad843ab1a58129104f83f366db (diff) | |
| download | qemu-1e120ffead85d08d41160065e0d8cf86400b1c9e.zip qemu-1e120ffead85d08d41160065e0d8cf86400b1c9e.tar.gz qemu-1e120ffead85d08d41160065e0d8cf86400b1c9e.tar.bz2 | |
nbd/server: nbd_negotiate: return 1 on NBD_OPT_ABORT
Separate the case when a client sends NBD_OPT_ABORT from all other
errors. It will be needed for the following patch, where errors will be
reported.
This particular case is not actually an error - it honestly follows the
NBD protocol. Therefore it should not be reported like an error.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20170707152918.23086-2-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
| -rw-r--r-- | nbd/server.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/nbd/server.c b/nbd/server.c index 8a70c05..3963972 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -349,9 +349,13 @@ static QIOChannel *nbd_negotiate_handle_starttls(NBDClient *client, return QIO_CHANNEL(tioc); } - -/* Process all NBD_OPT_* client option commands. - * Return -errno on error, 0 on success. */ +/* nbd_negotiate_options + * Process all NBD_OPT_* client option commands. + * Return: + * -errno on error + * 0 on successful negotiation + * 1 if client sent NBD_OPT_ABORT, i.e. on valid disconnect + */ static int nbd_negotiate_options(NBDClient *client) { uint32_t flags; @@ -459,7 +463,7 @@ static int nbd_negotiate_options(NBDClient *client) } /* Let the client keep trying, unless they asked to quit */ if (clientflags == NBD_OPT_ABORT) { - return -EINVAL; + return 1; } break; } @@ -477,7 +481,7 @@ static int nbd_negotiate_options(NBDClient *client) * disconnecting, but that we must also tolerate * guests that don't wait for our reply. */ nbd_negotiate_send_rep(client->ioc, NBD_REP_ACK, clientflags); - return -EINVAL; + return 1; case NBD_OPT_EXPORT_NAME: return nbd_negotiate_handle_export_name(client, length); @@ -533,6 +537,12 @@ static int nbd_negotiate_options(NBDClient *client) } } +/* nbd_negotiate + * Return: + * -errno on error + * 0 on successful negotiation + * 1 if client sent NBD_OPT_ABORT, i.e. on valid disconnect + */ static coroutine_fn int nbd_negotiate(NBDClient *client) { char buf[8 + 8 + 8 + 128]; |