>From 5b0cfc37b45670a35228c96cbaee2b99cd3d447c Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Tue, 16 May 2017 12:22:22 +0200 Subject: [PATCH] fuseblk: Fix warning in super_setup_bdi_name() Commit 5f7f7543f52e "fuse: Convert to separately allocated bdi" didn't properly handle fuseblk filesystem. When fuse_bdi_init() is called for that filesystem type, sb->s_bdi is already initialized (by set_bdev_super()) to point to block device's bdi and consequently super_setup_bdi_name() complains about this fact when reseting bdi to the private one. Fix the problem by properly dropping bdi reference in fuse_bdi_init() before creating a private bdi in super_setup_bdi_name(). Fixes: 5f7f7543f52eee03ed35c9d671fbb1cdbd4bc9b5 Reported-by: Rakesh Pandit Signed-off-by: Jan Kara --- fs/fuse/inode.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 5a1b58f8fef4..65c88379a3a1 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -975,8 +975,15 @@ static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb) int err; char *suffix = ""; - if (sb->s_bdev) + if (sb->s_bdev) { suffix = "-fuseblk"; + /* + * sb->s_bdi points to blkdev's bdi however we want to redirect + * it to our private bdi... + */ + bdi_put(sb->s_bdi); + sb->s_bdi = &noop_backing_dev_info; + } err = super_setup_bdi_name(sb, "%u:%u%s", MAJOR(fc->dev), MINOR(fc->dev), suffix); if (err) -- 2.12.0