On Tue, Nov 22, 2005 at 06:47:50PM +0800, Hawk Xu wrote: > Hi! > > After removing the xattr of an inode by system call removexattr(), how > do I update the i_security field of the inode? (e.g. release the space > and set it to NULL.) Is there a inode_post_removexattr() hook or > something like that? > > Thanks! I can only suggest reading include/linux/security.h. Assign module specific data to i_security in your 'inode_alloc_security' hook. Release it in your 'inode_free_security' hook. Most of the security labels on kernel objects have distinct alloc/free hooks for a reason. In the freeing case the kernel usually calls the hook when usage falls to zero and the kernel object is about to be released. Attempting to zero *_security outside of this situation is asking for problems unless you absolutely know what you're doing (locking wise) and even then I wouldn't recommend it. Tony
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