Re: [PATCH 5/7] smb: client: allow creating special files via reparse points

[Paulo Alcantara <pc@manguebit.com>]

Paulo Alcantara <pc@manguebit.com> writes:

> +static int create_nfs_reparse(const unsigned int xid,
> +			      struct cifs_tcon *tcon,
> +			      struct cifs_sb_info *cifs_sb,
> +			      const char *full_path, mode_t mode,
> +			      struct reparse_posix_data *buf)
> +{
> +	u64 type;
> +	u16 len, dlen;
> +
> +	len = sizeof(*buf);
> +
> +	switch ((type = mode_nfs_type(mode))) {
> +	case NFS_SPECFILE_BLK:
> +	case NFS_SPECFILE_CHR:
> +		dlen = sizeof(__le64);
> +		break;
> +	case NFS_SPECFILE_FIFO:
> +	case NFS_SPECFILE_SOCK:
> +		dlen = 0;
> +		break;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
> +
> +	buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS);
> +	buf->InodeType = cpu_to_le64(type);
> +	buf->ReparseDataLength = cpu_to_le16(len + dlen -
> +					     sizeof(struct reparse_data_buffer));

Err, forgot having @buf->Reserved set to 0 here, sorry.  MS-FSCC
doesnt't say we _must_ to, however it's better not sending garbage over
the wire.

Let me know if you'd need v2 for the above.