Re: [PATCH v4] Add ioctls to get/set the ext4 superblock uuid.
flat view
From: Matthew Wilcox <willy@infradead.org>
Date: 2022-07-20 03:19:19
Also in:
linux-ext4, linux-fsdevel
On Tue, Jul 19, 2022 at 04:41:31PM -0700, Jeremy Bongio wrote:
quoted hunk ↗ jump to hunk
+/* + * Structure for EXT4_IOC_GETFSUUID/EXT4_IOC_SETFSUUID + */ +struct fsuuid { + __u32 fsu_len; + __u32 fsu_flags; + __u8 fsu_uuid[]; +};
A UUID has a defined size (128 bits): https://en.wikipedia.org/wiki/Universally_unique_identifier Why are we defining flags and len?