From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47313) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dxyZr-00029X-K3 for qemu-devel@nongnu.org; Fri, 29 Sep 2017 12:55:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dxyZq-00045Z-OF for qemu-devel@nongnu.org; Fri, 29 Sep 2017 12:55:51 -0400 From: Max Reitz Date: Fri, 29 Sep 2017 18:53:36 +0200 Message-Id: <20170929165347.29658-15-mreitz@redhat.com> In-Reply-To: <20170929165347.29658-1-mreitz@redhat.com> References: <20170929165347.29658-1-mreitz@redhat.com> Subject: [Qemu-devel] [PATCH v6 14/25] block/nfs: Implement bdrv_dirname() List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, Max Reitz , Kevin Wolf , Alberto Garcia , Eric Blake , John Snow List-ID: While the basic idea is obvious and could be handled by the default bdrv_dirname() implementation, we cannot generate a directory name if the gid or uid are set, so we have to explicitly return NULL in those cases. Signed-off-by: Max Reitz --- block/nfs.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/block/nfs.c b/block/nfs.c index 337fcd9c84..0152a9bd32 100644 --- a/block/nfs.c +++ b/block/nfs.c @@ -875,6 +875,19 @@ static void nfs_refresh_filename(BlockDriverState *bs, QDict *options) bs->full_open_options = opts; } +static char *nfs_dirname(BlockDriverState *bs, Error **errp) +{ + NFSClient *client = bs->opaque; + + if (client->uid || client->gid) { + error_setg(errp, "Cannot generate a base directory for NBD node '%s'", + bs->filename); + return NULL; + } + + return g_strdup_printf("nfs://%s%s/", client->server->host, client->path); +} + #ifdef LIBNFS_FEATURE_PAGECACHE static void nfs_invalidate_cache(BlockDriverState *bs, Error **errp) @@ -908,6 +921,7 @@ static BlockDriver bdrv_nfs = { .bdrv_detach_aio_context = nfs_detach_aio_context, .bdrv_attach_aio_context = nfs_attach_aio_context, .bdrv_refresh_filename = nfs_refresh_filename, + .bdrv_dirname = nfs_dirname, #ifdef LIBNFS_FEATURE_PAGECACHE .bdrv_invalidate_cache = nfs_invalidate_cache, -- 2.13.6