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authorMiklos Szeredi <mszeredi@redhat.com>2019-10-15 17:11:41 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2019-10-15 17:11:41 +0300
commit3f22c7467136adfa6d2a7baf7cd5c573f0641bd1 (patch)
treef5b1f84e894ec982e4d554b7169fed2d8cd698e5 /fs
parent112e72373d1f60f1e4558d0a7f0de5da39a1224d (diff)
downloadlinux-3f22c7467136adfa6d2a7baf7cd5c573f0641bd1.tar.xz
virtio-fs: don't show mount options
Virtio-fs does not accept any mount options, so it's confusing and wrong to show any in /proc/mounts. Reported-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/fuse/fuse_i.h4
-rw-r--r--fs/fuse/inode.c4
-rw-r--r--fs/fuse/virtio_fs.c1
3 files changed, 9 insertions, 0 deletions
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 956aeaf961ae..d148188cfca4 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -479,6 +479,7 @@ struct fuse_fs_context {
bool destroy:1;
bool no_control:1;
bool no_force_umount:1;
+ bool no_mount_options:1;
unsigned int max_read;
unsigned int blksize;
const char *subtype;
@@ -713,6 +714,9 @@ struct fuse_conn {
/** Do not allow MNT_FORCE umount */
unsigned int no_force_umount:1;
+ /* Do not show mount options */
+ unsigned int no_mount_options:1;
+
/** The number of requests waiting for completion */
atomic_t num_waiting;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index e040e2a2b621..16aec32f7f3d 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -558,6 +558,9 @@ static int fuse_show_options(struct seq_file *m, struct dentry *root)
struct super_block *sb = root->d_sb;
struct fuse_conn *fc = get_fuse_conn_super(sb);
+ if (fc->no_mount_options)
+ return 0;
+
seq_printf(m, ",user_id=%u", from_kuid_munged(fc->user_ns, fc->user_id));
seq_printf(m, ",group_id=%u", from_kgid_munged(fc->user_ns, fc->group_id));
if (fc->default_permissions)
@@ -1180,6 +1183,7 @@ int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx)
fc->destroy = ctx->destroy;
fc->no_control = ctx->no_control;
fc->no_force_umount = ctx->no_force_umount;
+ fc->no_mount_options = ctx->no_mount_options;
err = -ENOMEM;
root = fuse_get_root_inode(sb, ctx->rootmode);
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 6af3f131e468..e22a0c003c3d 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -992,6 +992,7 @@ static int virtio_fs_fill_super(struct super_block *sb)
.destroy = true,
.no_control = true,
.no_force_umount = true,
+ .no_mount_options = true,
};
mutex_lock(&virtio_fs_mutex);