48  * Get the key quota record for a user, allocating a new record if one doesn't
53 	struct key_user *candidate = NULL, *user;  in key_user_lookup()  local
61 	/* search the tree for a user record with a matching UID */  in key_user_lookup()
64 		user = rb_entry(parent, struct key_user, node);  in key_user_lookup()
66 		if (uid_lt(uid, user->uid))  in key_user_lookup()
68 		else if (uid_gt(uid, user->uid))  in key_user_lookup()
76 		/* allocate a candidate user record if we don't already have  in key_user_lookup()
80 		user = NULL;  in key_user_lookup()
91 	/* if we get here, then the user record still hadn't appeared on the  in key_user_lookup()
105 	user = candidate;  in key_user_lookup()
108 	/* okay - we found a user record for this UID */  in key_user_lookup()
110 	refcount_inc(&user->usage);  in key_user_lookup()
114 	return user;  in key_user_lookup()
118  * Dispose of a user structure
120 void key_user_put(struct key_user *user)  in key_user_put()  argument
122 	if (refcount_dec_and_lock(&user->usage, &key_user_lock)) {  in key_user_put()
123 		rb_erase(&user->node, &key_user_tree);  in key_user_put()
126 		kfree(user);  in key_user_put()
210  * The user's key count quota is updated to reflect the creation of the key and
211  * the user's key data quota has the default for the key type reserved.  The
230 	struct key_user *user = NULL;  in key_alloc()  local
250 	/* get hold of the key tracking for this user */  in key_alloc()
251 	user = key_user_lookup(uid);  in key_alloc()
252 	if (!user)  in key_alloc()
255 	/* check that the user's quota permits allocation of another key and  in key_alloc()
263 		spin_lock(&user->lock);  in key_alloc()
265 			if (user->qnkeys + 1 > maxkeys ||  in key_alloc()
266 			    user->qnbytes + quotalen > maxbytes ||  in key_alloc()
267 			    user->qnbytes + quotalen < user->qnbytes)  in key_alloc()
271 		user->qnkeys++;  in key_alloc()
272 		user->qnbytes += quotalen;  in key_alloc()
273 		spin_unlock(&user->lock);  in key_alloc()
291 	key->user = user;  in key_alloc()
320 	atomic_inc(&user->nkeys);  in key_alloc()
330 		spin_lock(&user->lock);  in key_alloc()
331 		user->qnkeys--;  in key_alloc()
332 		user->qnbytes -= quotalen;  in key_alloc()
333 		spin_unlock(&user->lock);  in key_alloc()
335 	key_user_put(user);  in key_alloc()
343 		spin_lock(&user->lock);  in key_alloc()
344 		user->qnkeys--;  in key_alloc()
345 		user->qnbytes -= quotalen;  in key_alloc()
346 		spin_unlock(&user->lock);  in key_alloc()
348 	key_user_put(user);  in key_alloc()
354 	spin_unlock(&user->lock);  in key_alloc()
355 	key_user_put(user);  in key_alloc()
366  * Adjust the amount of the owning user's key data quota that a key reserves.
381 		unsigned maxbytes = uid_eq(key->user->uid, GLOBAL_ROOT_UID) ?  in key_payload_reserve()
384 		spin_lock(&key->user->lock);  in key_payload_reserve()
387 		    (key->user->qnbytes + delta > maxbytes ||  in key_payload_reserve()
388 		     key->user->qnbytes + delta < key->user->qnbytes)) {  in key_payload_reserve()
392 			key->user->qnbytes += delta;  in key_payload_reserve()
395 		spin_unlock(&key->user->lock);  in key_payload_reserve()
447 			atomic_inc(&key->user->nikeys);  in __key_instantiate_and_link()
606 		atomic_inc(&key->user->nikeys);  in key_reject_and_link()
1213 	/* record the root user tracking */  in key_init()