Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 | // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2024 Benjamin Tissoires */ #include "bpf_experimental.h" #include <bpf/bpf_helpers.h> #include "bpf_misc.h" #include "../bpf_testmod/bpf_testmod_kfunc.h" char _license[] SEC("license") = "GPL"; struct elem { struct bpf_wq w; }; struct { __uint(type, BPF_MAP_TYPE_ARRAY); __uint(max_entries, 2); __type(key, int); __type(value, struct elem); } array SEC(".maps"); struct { __uint(type, BPF_MAP_TYPE_LRU_HASH); __uint(max_entries, 4); __type(key, int); __type(value, struct elem); } lru SEC(".maps"); /* callback for non sleepable workqueue */ static int wq_callback(void *map, int *key, struct bpf_wq *work) { bpf_kfunc_common_test(); return 0; } /* callback for sleepable workqueue */ static int wq_cb_sleepable(void *map, int *key, struct bpf_wq *work) { bpf_kfunc_call_test_sleepable(); return 0; } SEC("tc") /* test that bpf_wq_init takes a map as a second argument */ __log_level(2) __flag(BPF_F_TEST_STATE_FREQ) __failure __msg(": (85) call bpf_wq_init#") /* anchor message */ __msg("pointer in R2 isn't map pointer") long test_wq_init_nomap(void *ctx) { struct bpf_wq *wq; struct elem *val; int key = 0; val = bpf_map_lookup_elem(&array, &key); if (!val) return -1; wq = &val->w; if (bpf_wq_init(wq, &key, 0) != 0) return -3; return 0; } SEC("tc") /* test that the workqueue is part of the map in bpf_wq_init */ __log_level(2) __flag(BPF_F_TEST_STATE_FREQ) __failure __msg(": (85) call bpf_wq_init#") /* anchor message */ __msg("workqueue pointer in R1 map_uid=0 doesn't match map pointer in R2 map_uid=0") long test_wq_init_wrong_map(void *ctx) { struct bpf_wq *wq; struct elem *val; int key = 0; val = bpf_map_lookup_elem(&array, &key); if (!val) return -1; wq = &val->w; if (bpf_wq_init(wq, &lru, 0) != 0) return -3; return 0; } SEC("?tc") __log_level(2) __failure /* check that the first argument of bpf_wq_set_callback() * is a correct bpf_wq pointer. */ __msg(": (85) call bpf_wq_set_callback_impl#") /* anchor message */ __msg("arg#0 doesn't point to a map value") long test_wrong_wq_pointer(void *ctx) { int key = 0; struct bpf_wq *wq; wq = bpf_map_lookup_elem(&array, &key); if (!wq) return 1; if (bpf_wq_init(wq, &array, 0)) return 2; if (bpf_wq_set_callback((void *)&wq, wq_callback, 0)) return 3; return -22; } SEC("?tc") __log_level(2) __failure /* check that the first argument of bpf_wq_set_callback() * is a correct bpf_wq pointer. */ __msg(": (85) call bpf_wq_set_callback_impl#") /* anchor message */ __msg("off 1 doesn't point to 'struct bpf_wq' that is at 0") long test_wrong_wq_pointer_offset(void *ctx) { int key = 0; struct bpf_wq *wq; wq = bpf_map_lookup_elem(&array, &key); if (!wq) return 1; if (bpf_wq_init(wq, &array, 0)) return 2; if (bpf_wq_set_callback((void *)wq + 1, wq_cb_sleepable, 0)) return 3; return -22; } |