From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53619) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bz1WN-0003m2-Rs for qemu-devel@nongnu.org; Tue, 25 Oct 2016 09:12:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bz1WJ-00036P-QF for qemu-devel@nongnu.org; Tue, 25 Oct 2016 09:12:03 -0400 From: Max Reitz Date: Tue, 25 Oct 2016 15:11:33 +0200 Message-Id: <20161025131141.24762-6-mreitz@redhat.com> In-Reply-To: <20161025131141.24762-1-mreitz@redhat.com> References: <20161025131141.24762-1-mreitz@redhat.com> Subject: [Qemu-devel] [PATCH v5 05/13] block/nbd: Add nbd_has_filename_options_conflict() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, Max Reitz , Kevin Wolf , Eric Blake , Paolo Bonzini , Markus Armbruster Right now, we have four possible options that conflict with specifying an NBD filename, and a future patch will add another one ("address"). This future option is a nested QDict that is flattened at this point, requiring us to test each option whether its key has an "address." prefix. Therefore, we will then need to iterate through all options (including the "export" option which was not covered so far). Adding this iteration logic now will simplify adding the new option later. A nice side effect is that the user will not receive a long list of five options which are not supposed to be specified with a filename, but we can actually print the problematic option. Reviewed-by: Kevin Wolf Signed-off-by: Max Reitz --- block/nbd.c | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-) diff --git a/block/nbd.c b/block/nbd.c index c539fb5..cdab20f 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -123,6 +123,25 @@ out: return ret; } +static bool nbd_has_filename_options_conflict(QDict *options, Error **errp) +{ + const QDictEntry *e; + + for (e = qdict_first(options); e; e = qdict_next(options, e)) { + if (!strcmp(e->key, "host") || + !strcmp(e->key, "port") || + !strcmp(e->key, "path") || + !strcmp(e->key, "export")) + { + error_setg(errp, "Option '%s' cannot be used with a file name", + e->key); + return true; + } + } + + return false; +} + static void nbd_parse_filename(const char *filename, QDict *options, Error **errp) { @@ -131,12 +150,7 @@ static void nbd_parse_filename(const char *filename, QDict *options, const char *host_spec; const char *unixpath; - if (qdict_haskey(options, "host") - || qdict_haskey(options, "port") - || qdict_haskey(options, "path")) - { - error_setg(errp, "host/port/path and a file name may not be specified " - "at the same time"); + if (nbd_has_filename_options_conflict(options, errp)) { return; } -- 2.10.1