1 // SPDX-License-Identifier: GPL-2.0
68 	/* *key == 0 - the callback was called for array timer.  in timer_cb1()
69 	 * *key == 4 - the callback was called from lru timer.  in timer_cb1()
86 		int lru_key, i;  in timer_cb1()  local
88 		for (i = LRU + 1;  in timer_cb1()
89 		     i <= 100  /* for current LRU eviction algorithm this number  in timer_cb1()
90 				* should be larger than ~ lru->max_entries * 2  in timer_cb1()
92 		     i++) {  in timer_cb1()
98 			lru_key = i;  in timer_cb1()
100 			/* add more elements into lru map to push out current  in timer_cb1()
115 		if (bpf_timer_cancel(timer) != -EINVAL)  in timer_cb1()
145 	 * doesn't leak timer memory.  in BPF_PROG()
155 /* callback for prealloc and non-prealloca hashtab timers */
159 		callback_check--;  in timer_cb2()
161 		callback2_check--;  in timer_cb2()
162 	if (val->counter > 0 && --val->counter) {  in timer_cb2()
163 		/* re-arm the timer again to execute after 1 usec */  in timer_cb2()
164 		bpf_timer_start(&val->timer, 1000, 0);  in timer_cb2()
182 		if (bpf_timer_cancel(&val->timer) != -EDEADLK)  in timer_cb2()
193 		 * It's not a use-after-free. The memory is owned by the map.  in timer_cb2()
195 		if (bpf_timer_start(&val->timer, 1000, 0) != -EINVAL)  in timer_cb2()
203 		if (bpf_timer_cancel(&val->timer) != -EDEADLK)  in timer_cb2()
211 		/* in non-preallocated hashmap both 'key' and 'val' are RCU  in timer_cb2()
220 		if (bpf_timer_start(&val->timer, 1ull << 35, 0) != 0)  in timer_cb2()
234 		if (bpf_timer_init(&val->timer, &hmap, CLOCK_BOOTTIME) != 0)  in bpf_timer_test()
236 		bpf_timer_set_callback(&val->timer, timer_cb2);  in bpf_timer_test()
237 		bpf_timer_start(&val->timer, 1000, 0);  in bpf_timer_test()
241 		if (bpf_timer_init(&val->timer, &hmap_malloc, CLOCK_BOOTTIME) != 0)  in bpf_timer_test()
243 		bpf_timer_set_callback(&val->timer, timer_cb2);  in bpf_timer_test()
244 		bpf_timer_start(&val->timer, 1000, 0);  in bpf_timer_test()
259 		bpf_timer_init(&val->timer, &hmap, CLOCK_BOOTTIME);  in BPF_PROG()
266 		bpf_timer_init(&val->timer, &hmap_malloc, CLOCK_BOOTTIME);  in BPF_PROG()
271 	 * don't leak timer memory.  in BPF_PROG()
277 		bpf_timer_init(&val->timer, &hmap, CLOCK_BOOTTIME);  in BPF_PROG()
282 		bpf_timer_init(&val->timer, &hmap, CLOCK_BOOTTIME);  in BPF_PROG()
284 	/* and with non-prealloc htab */  in BPF_PROG()
289 		bpf_timer_init(&val->timer, &hmap_malloc, CLOCK_BOOTTIME);  in BPF_PROG()
294 		bpf_timer_init(&val->timer, &hmap_malloc, CLOCK_BOOTTIME);  in BPF_PROG()