47  * Get the key quota record for a user, allocating a new record if one doesn't
52 	struct key_user *candidate = NULL, *user;  in key_user_lookup()  local
60 	/* search the tree for a user record with a matching UID */  in key_user_lookup()
63 		user = rb_entry(parent, struct key_user, node);  in key_user_lookup()
65 		if (uid_lt(uid, user->uid))  in key_user_lookup()
67 		else if (uid_gt(uid, user->uid))  in key_user_lookup()
75 		/* allocate a candidate user record if we don't already have  in key_user_lookup()
79 		user = NULL;  in key_user_lookup()
90 	/* if we get here, then the user record still hadn't appeared on the  in key_user_lookup()
104 	user = candidate;  in key_user_lookup()
107 	/* okay - we found a user record for this UID */  in key_user_lookup()
109 	refcount_inc(&user->usage);  in key_user_lookup()
113 	return user;  in key_user_lookup()
117  * Dispose of a user structure
119 void key_user_put(struct key_user *user)  in key_user_put()  argument
121 	if (refcount_dec_and_lock(&user->usage, &key_user_lock)) {  in key_user_put()
122 		rb_erase(&user->node, &key_user_tree);  in key_user_put()
125 		kfree(user);  in key_user_put()
209  * The user's key count quota is updated to reflect the creation of the key and
210  * the user's key data quota has the default for the key type reserved.  The
229 	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_irqsave(&user->lock, irqflags);  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_irqrestore(&user->lock, irqflags);  in key_alloc()
291 	key->user = user;  in key_alloc()
321 	atomic_inc(&user->nkeys);  in key_alloc()
331 		spin_lock_irqsave(&user->lock, irqflags);  in key_alloc()
332 		user->qnkeys--;  in key_alloc()
333 		user->qnbytes -= quotalen;  in key_alloc()
334 		spin_unlock_irqrestore(&user->lock, irqflags);  in key_alloc()
336 	key_user_put(user);  in key_alloc()
344 		spin_lock_irqsave(&user->lock, irqflags);  in key_alloc()
345 		user->qnkeys--;  in key_alloc()
346 		user->qnbytes -= quotalen;  in key_alloc()
347 		spin_unlock_irqrestore(&user->lock, irqflags);  in key_alloc()
349 	key_user_put(user);  in key_alloc()
355 	spin_unlock_irqrestore(&user->lock, irqflags);  in key_alloc()
356 	key_user_put(user);  in key_alloc()
367  * Adjust the amount of the owning user's key data quota that a key reserves.
382 		unsigned maxbytes = uid_eq(key->user->uid, GLOBAL_ROOT_UID) ?  in key_payload_reserve()
386 		spin_lock_irqsave(&key->user->lock, flags);  in key_payload_reserve()
389 		    (key->user->qnbytes + delta > maxbytes ||  in key_payload_reserve()
390 		     key->user->qnbytes + delta < key->user->qnbytes)) {  in key_payload_reserve()
394 			key->user->qnbytes += delta;  in key_payload_reserve()
397 		spin_unlock_irqrestore(&key->user->lock, flags);  in key_payload_reserve()
449 			atomic_inc(&key->user->nikeys);  in __key_instantiate_and_link()
606 		atomic_inc(&key->user->nikeys);  in key_reject_and_link()
654 			/* deal with the user's key tracking and quota */  in key_put()
656 				spin_lock_irqsave(&key->user->lock, flags);  in key_put()
657 				key->user->qnkeys--;  in key_put()
658 				key->user->qnbytes -= key->quotalen;  in key_put()
659 				spin_unlock_irqrestore(&key->user->lock, flags);  in key_put()
661 			smp_mb(); /* key->user before FINAL_PUT set. */  in key_put()
1285 	/* record the root user tracking */  in key_init()