From: yangerkun <yangerkun@xxxxxxxxxx> Subject: ramfs: fix mount source show for ramfs ramfs_parse_param does not parse key "source", and will convert -ENOPARAM to 0. This will skip vfs_parse_fs_param_source in vfs_parse_fs_param, which lead always "none" mount source for ramfs. Fix it by parse "source" in ramfs_parse_param like cgroup1_parse_param has do. Link: https://lkml.kernel.org/r/20210924091756.1906118-1-yangerkun@xxxxxxxxxx Signed-off-by: yangerkun <yangerkun@xxxxxxxxxx> Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/ramfs/inode.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) --- a/fs/ramfs/inode.c~ramfs-fix-mount-source-show-for-ramfs +++ a/fs/ramfs/inode.c @@ -203,17 +203,20 @@ static int ramfs_parse_param(struct fs_c int opt; opt = fs_parse(fc, ramfs_fs_parameters, param, &result); - if (opt < 0) { + if (opt == -ENOPARAM) { + opt = vfs_parse_fs_param_source(fc, param); + if (opt != -ENOPARAM) + return opt; /* * We might like to report bad mount options here; * but traditionally ramfs has ignored all mount options, * and as it is used as a !CONFIG_SHMEM simple substitute * for tmpfs, better continue to ignore other mount options. */ - if (opt == -ENOPARAM) - opt = 0; - return opt; + return 0; } + if (opt < 0) + return opt; switch (opt) { case Opt_mode: _
