Re: [PATCH 00/52] Introduce credential record

[David Howells]

Theodore Tso <tytso@xxxxxxx> wrote:

>    I'm going to ask a stupid question, and I probably missed something
> in the 52 patches, but....  I see how the credential is used to do
> access checks, but why does the credentials record need to passed all
> the way into block allocator?  What is it used for there?

Ext2, 3 & 4 use it to determine whether someone has the right to use the
reserved space according to whether their UID/GID match those in the
superblock.

See ext3_has_free_blocks() for an example.

David
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