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| author | Stefan Hajnoczi | 2019-08-27 11:54:35 +0200 |
|---|---|---|
| committer | Dr. David Alan Gilbert | 2020-01-23 17:41:36 +0100 |
| commit | 45018fbb0a73ce66fd3dd87ecd2872b45658add4 (patch) | |
| tree | d50b46e57f222fbae268ffe6245917357aafa3b4 | |
| parent | virtiofsd: add vhost-user.json file (diff) | |
| download | qemu-45018fbb0a73ce66fd3dd87ecd2872b45658add4.tar.gz qemu-45018fbb0a73ce66fd3dd87ecd2872b45658add4.tar.xz qemu-45018fbb0a73ce66fd3dd87ecd2872b45658add4.zip | |
virtiofsd: add --print-capabilities option
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>
| -rw-r--r-- | docs/interop/vhost-user.json | 4 | ||||
| -rw-r--r-- | tools/virtiofsd/fuse_lowlevel.h | 1 | ||||
| -rw-r--r-- | tools/virtiofsd/helper.c | 2 | ||||
| -rw-r--r-- | tools/virtiofsd/passthrough_ll.c | 12 |
4 files changed, 18 insertions, 1 deletions
diff --git a/docs/interop/vhost-user.json b/docs/interop/vhost-user.json index ce0ef74db5..ef8ac5941f 100644 --- a/docs/interop/vhost-user.json +++ b/docs/interop/vhost-user.json @@ -31,6 +31,7 @@ # @rproc-serial: virtio remoteproc serial link # @scsi: virtio scsi # @vsock: virtio vsock transport +# @fs: virtio fs (since 4.2) # # Since: 4.0 ## @@ -50,7 +51,8 @@ 'rpmsg', 'rproc-serial', 'scsi', - 'vsock' + 'vsock', + 'fs' ] } diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowlevel.h index f6b34700af..0d61df8110 100644 --- a/tools/virtiofsd/fuse_lowlevel.h +++ b/tools/virtiofsd/fuse_lowlevel.h @@ -1794,6 +1794,7 @@ struct fuse_cmdline_opts { int nodefault_subtype; int show_version; int show_help; + int print_capabilities; unsigned int max_idle_threads; }; diff --git a/tools/virtiofsd/helper.c b/tools/virtiofsd/helper.c index a3645fc807..b8ec5ac8dc 100644 --- a/tools/virtiofsd/helper.c +++ b/tools/virtiofsd/helper.c @@ -40,6 +40,7 @@ static const struct fuse_opt fuse_helper_opts[] = { FUSE_HELPER_OPT("--help", show_help), FUSE_HELPER_OPT("-V", show_version), FUSE_HELPER_OPT("--version", show_version), + FUSE_HELPER_OPT("--print-capabilities", print_capabilities), FUSE_HELPER_OPT("-d", debug), FUSE_HELPER_OPT("debug", debug), FUSE_HELPER_OPT("-d", foreground), @@ -135,6 +136,7 @@ void fuse_cmdline_help(void) { printf(" -h --help print help\n" " -V --version print version\n" + " --print-capabilities print vhost-user.json\n" " -d -o debug enable debug output (implies -f)\n" " -f foreground operation\n" " --daemonize run in background\n" diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c index 037c5d7b26..cd27c09f59 100644 --- a/tools/virtiofsd/passthrough_ll.c +++ b/tools/virtiofsd/passthrough_ll.c @@ -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) { |