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From a8a1835a82510be7d2d6edcc28a60e506a2cedad Mon Sep 17 00:00:00 2001
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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Date: Mon, 27 Jan 2020 19:00:46 +0100
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Subject: [PATCH 015/116] virtiofsd: remove mountpoint dummy argument
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Message-id: <20200127190227.40942-12-dgilbert@redhat.com>
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Patchwork-id: 93466
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O-Subject: [RHEL-AV-8.2 qemu-kvm PATCH 011/112] virtiofsd: remove mountpoint dummy argument
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Bugzilla: 1694164
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RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Sergio Lopez Pascual <slp@redhat.com>
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From: Stefan Hajnoczi <stefanha@redhat.com>
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Classic FUSE file system daemons take a mountpoint argument but
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virtiofsd exposes a vhost-user UNIX domain socket instead.  The
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mountpoint argument is not used by virtiofsd but the user is still
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required to pass a dummy argument on the command-line.
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Remove the mountpoint argument to clean up the command-line.
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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(cherry picked from commit 67aab02272f6cb47c56420f60b370c184961b5ca)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 tools/virtiofsd/fuse_lowlevel.c  |  2 +-
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 tools/virtiofsd/fuse_lowlevel.h  |  4 +---
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 tools/virtiofsd/helper.c         | 20 +++-----------------
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 tools/virtiofsd/passthrough_ll.c | 12 ++----------
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 4 files changed, 7 insertions(+), 31 deletions(-)
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diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
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index 5c9cb52..2f32c68 100644
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--- a/tools/virtiofsd/fuse_lowlevel.c
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+++ b/tools/virtiofsd/fuse_lowlevel.c
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@@ -2455,7 +2455,7 @@ out1:
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     return NULL;
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 }
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-int fuse_session_mount(struct fuse_session *se, const char *mountpoint)
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+int fuse_session_mount(struct fuse_session *se)
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 {
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     int fd;
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diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowlevel.h
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index adb9054..8d8909b 100644
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--- a/tools/virtiofsd/fuse_lowlevel.h
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+++ b/tools/virtiofsd/fuse_lowlevel.h
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@@ -1863,7 +1863,6 @@ struct fuse_cmdline_opts {
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     int foreground;
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     int debug;
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     int nodefault_subtype;
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-    char *mountpoint;
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     int show_version;
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     int show_help;
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     unsigned int max_idle_threads;
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@@ -1924,12 +1923,11 @@ struct fuse_session *fuse_session_new(struct fuse_args *args,
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 /**
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  * Mount a FUSE file system.
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  *
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- * @param mountpoint the mount point path
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  * @param se session object
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  *
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  * @return 0 on success, -1 on failure.
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  **/
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-int fuse_session_mount(struct fuse_session *se, const char *mountpoint);
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+int fuse_session_mount(struct fuse_session *se);
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 /**
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  * Enter a single threaded, blocking event loop.
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diff --git a/tools/virtiofsd/helper.c b/tools/virtiofsd/helper.c
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index 5711dd2..5e6f205 100644
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--- a/tools/virtiofsd/helper.c
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+++ b/tools/virtiofsd/helper.c
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@@ -140,27 +140,13 @@ void fuse_cmdline_help(void)
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 static int fuse_helper_opt_proc(void *data, const char *arg, int key,
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                                 struct fuse_args *outargs)
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 {
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+    (void)data;
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     (void)outargs;
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-    struct fuse_cmdline_opts *opts = data;
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     switch (key) {
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     case FUSE_OPT_KEY_NONOPT:
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-        if (!opts->mountpoint) {
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-            if (fuse_mnt_parse_fuse_fd(arg) != -1) {
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-                return fuse_opt_add_opt(&opts->mountpoint, arg);
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-            }
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-
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-            char mountpoint[PATH_MAX] = "";
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-            if (realpath(arg, mountpoint) == NULL) {
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-                fuse_log(FUSE_LOG_ERR, "fuse: bad mount point `%s': %s\n", arg,
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-                         strerror(errno));
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-                return -1;
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-            }
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-            return fuse_opt_add_opt(&opts->mountpoint, mountpoint);
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-        } else {
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-            fuse_log(FUSE_LOG_ERR, "fuse: invalid argument `%s'\n", arg);
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-            return -1;
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-        }
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+        fuse_log(FUSE_LOG_ERR, "fuse: invalid argument `%s'\n", arg);
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+        return -1;
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     default:
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         /* Pass through unknown options */
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diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
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index c5850ef..9377718 100644
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--- a/tools/virtiofsd/passthrough_ll.c
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+++ b/tools/virtiofsd/passthrough_ll.c
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@@ -1297,7 +1297,7 @@ int main(int argc, char *argv[])
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         return 1;
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     }
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     if (opts.show_help) {
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-        printf("usage: %s [options] <mountpoint>\n\n", argv[0]);
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+        printf("usage: %s [options]\n\n", argv[0]);
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         fuse_cmdline_help();
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         fuse_lowlevel_help();
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         ret = 0;
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@@ -1308,13 +1308,6 @@ int main(int argc, char *argv[])
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         goto err_out1;
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     }
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-    if (opts.mountpoint == NULL) {
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-        printf("usage: %s [options] <mountpoint>\n", argv[0]);
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-        printf("       %s --help\n", argv[0]);
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-        ret = 1;
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-        goto err_out1;
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-    }
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-
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     if (fuse_opt_parse(&args, &lo, lo_opts, NULL) == -1) {
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         return 1;
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     }
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@@ -1374,7 +1367,7 @@ int main(int argc, char *argv[])
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         goto err_out2;
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     }
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-    if (fuse_session_mount(se, opts.mountpoint) != 0) {
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+    if (fuse_session_mount(se) != 0) {
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         goto err_out3;
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     }
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@@ -1393,7 +1386,6 @@ err_out3:
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 err_out2:
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     fuse_session_destroy(se);
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 err_out1:
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-    free(opts.mountpoint);
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     fuse_opt_free_args(&args);
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     if (lo.root.fd >= 0) {
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-- 
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1.8.3.1
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