Messages in this thread | | | Date | Wed, 2 Sep 2015 21:06:32 +0200 | Subject | Re: [RFC v6 02/40] vfs: Add MAY_CREATE_FILE and MAY_CREATE_DIR permission flags | From | Andreas Gruenbacher <> |
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2015-09-02 20:53 GMT+02:00 J. Bruce Fields <bfields@fieldses.org>: >> @@ -453,7 +453,8 @@ static int sb_permission(struct super_block *sb, struct inode *inode, int mask) >> * this, letting us set arbitrary permissions for filesystem access without >> * changing the "normal" UIDs which are used for other things. >> * >> - * When checking for MAY_APPEND, MAY_WRITE must also be set in @mask. >> + * When checking for MAY_APPEND, MAY_CREATE_FILE, MAY_CREATE_DIR, >> + * MAY_WRITE must also be set in @mask. > > Why?
So that file systems that don't support MAY_APPEND can ignore the flag and will then automatically check for MAY_WRITE instead.
> (Also: written as a simple list like that, it's a ambiguous how to > parse that comment: I think you mean that MAY_WRITE must be set whenever > MAY_APPEND, MAY_CREATE_FILE, or MAY_CREATE_DIR are set.)
Yes, that's better.
Thanks, Andreas
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