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virtiofsd: add --print-capabilities option

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Add the --print-capabilities option as per vhost-user.rst "Backend
programs conventions".  Currently there are no advertised features.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2019-08-27 10:54:35 +01:00 • committed by Dr. David Alan Gilbert
parent 315616ed50
commit 45018fbb0a
4 changed files with 18 additions and 1 deletions
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12
tools/virtiofsd/passthrough_ll.c
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@ -1298,6 +1298,14 @@ static struct fuse_lowlevel_ops lo_oper = {
.lseek = lo_lseek,
};
/* Print vhost-user.json backend program capabilities */
static void print_capabilities(void)
{
printf("{\n");
printf(" \"type\": \"fs\"\n");
printf("}\n");
}
int main(int argc, char *argv[])
{
struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
@ -1328,6 +1336,10 @@ int main(int argc, char *argv[])
fuse_lowlevel_version();
ret = 0;
goto err_out1;
} else if (opts.print_capabilities) {
print_capabilities();
ret = 0;
goto err_out1;
}
if (fuse_opt_parse(&args, &lo, lo_opts, NULL) == -1) {