Boyang Xue | cd51b34 | 2017-05-27 10:48:28 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2017 Red Hat, Inc. |
| 3 | * |
| 4 | * This program is free software: you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation, either version 3 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | * |
| 17 | * Author: Boyang Xue <bxue@redhat.com> |
| 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * Functional test for splice(2): pipe to pipe |
| 22 | * |
| 23 | * This test case tests splice(2) from a pipe to another |
| 24 | */ |
| 25 | |
| 26 | #define _GNU_SOURCE |
| 27 | #include <fcntl.h> |
| 28 | #include <stdlib.h> |
| 29 | #include "tst_test.h" |
| 30 | |
| 31 | #define PIPE_MAX (64*1024) |
| 32 | |
| 33 | static char *str_len_data; |
| 34 | static int num_len_data = PIPE_MAX; |
| 35 | static char *arr_in, *arr_out; |
| 36 | |
| 37 | static struct tst_option options[] = { |
| 38 | {"l:", &str_len_data, "-l <num> Length of test data (in bytes)"}, |
| 39 | {NULL, NULL, NULL}, |
| 40 | }; |
| 41 | |
| 42 | static void setup(void) |
| 43 | { |
| 44 | int i, pipe_max_unpriv, pipe_limit; |
| 45 | |
| 46 | SAFE_FILE_SCANF("/proc/sys/fs/pipe-max-size", "%d", &pipe_max_unpriv); |
| 47 | pipe_limit = MIN(pipe_max_unpriv, num_len_data); |
| 48 | num_len_data = pipe_limit; |
| 49 | |
| 50 | if (tst_parse_int(str_len_data, &num_len_data, 1, pipe_limit)) { |
| 51 | tst_brk(TBROK, "Invalid length of data: '%s', " |
| 52 | "valid value: [1, %d]", str_len_data, pipe_limit); |
| 53 | } |
| 54 | tst_res(TINFO, "splice size = %d", num_len_data); |
| 55 | arr_in = SAFE_MALLOC(num_len_data); |
| 56 | arr_out = SAFE_MALLOC(num_len_data); |
| 57 | for (i = 0; i < num_len_data; i++) |
| 58 | arr_in[i] = i & 0xff; |
| 59 | } |
| 60 | |
| 61 | static void cleanup(void) |
| 62 | { |
| 63 | free(arr_in); |
| 64 | free(arr_out); |
| 65 | } |
| 66 | |
| 67 | static void pipe_pipe(void) |
| 68 | { |
| 69 | int pp1[2], pp2[2], i, ret; |
| 70 | |
| 71 | SAFE_PIPE(pp1); |
| 72 | SAFE_PIPE(pp2); |
| 73 | SAFE_WRITE(1, pp1[1], arr_in, num_len_data); |
| 74 | for (i = num_len_data; i > 0; i = i - ret) { |
| 75 | ret = splice(pp1[0], NULL, pp2[1], NULL, i, 0); |
| 76 | if (ret == -1) { |
| 77 | tst_res(TFAIL | TERRNO, "splice error"); |
| 78 | goto exit; |
| 79 | } |
| 80 | SAFE_READ(1, pp2[0], arr_out + num_len_data - i, ret); |
| 81 | } |
| 82 | |
| 83 | for (i = 0; i < num_len_data; i++) { |
| 84 | if (arr_in[i] != arr_out[i]) { |
| 85 | tst_res(TFAIL, "wrong data at %d: expected: %d, " |
| 86 | "actual: %d", i, arr_in[i], arr_out[i]); |
| 87 | goto exit; |
| 88 | } |
| 89 | } |
| 90 | tst_res(TPASS, "splice(2) from pipe to pipe run pass."); |
| 91 | |
| 92 | exit: |
| 93 | SAFE_CLOSE(pp1[1]); |
| 94 | SAFE_CLOSE(pp1[0]); |
| 95 | SAFE_CLOSE(pp2[1]); |
| 96 | SAFE_CLOSE(pp2[0]); |
| 97 | } |
| 98 | |
| 99 | static struct tst_test test = { |
| 100 | .tid = "splice04", |
| 101 | .test_all = pipe_pipe, |
| 102 | .setup = setup, |
| 103 | .cleanup = cleanup, |
| 104 | .options = options, |
| 105 | .min_kver = "2.6.31" |
| 106 | }; |