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Open Source and information security mailing list archives
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Date: Wed, 20 Jul 2022 04:18:51 +0100 From: Matthew Wilcox <willy@...radead.org> To: Jeremy Bongio <bongiojp@...il.com> Cc: Ted Tso <tytso@....edu>, linux-ext4@...r.kernel.org, linux-api@...r.kernel.org, linux-fsdevel@...r.kernel.org Subject: Re: [PATCH v4] Add ioctls to get/set the ext4 superblock uuid. On Tue, Jul 19, 2022 at 04:41:31PM -0700, Jeremy Bongio wrote: > +/* > + * 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?
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