|
| 1 | +// SPDX-License-Identifier: CDDL-1.0 |
| 2 | + |
| 3 | +#include <errno.h> |
| 4 | +#include <fcntl.h> |
| 5 | +#include <limits.h> |
| 6 | +#include <pthread.h> |
| 7 | +#include <string.h> |
| 8 | +#include <stdio.h> |
| 9 | +#include <stdlib.h> |
| 10 | +#include <unistd.h> |
| 11 | +#include <sys/stat.h> |
| 12 | + |
| 13 | +#if defined(_GNU_SOURCE) && defined(__linux__) |
| 14 | +_Static_assert(sizeof (loff_t) == sizeof (off_t), |
| 15 | + "loff_t and off_t must be the same size"); |
| 16 | +#endif |
| 17 | + |
| 18 | +ssize_t |
| 19 | +copy_file_range(int, off_t *, int, off_t *, size_t, unsigned int) |
| 20 | + __attribute__((weak)); |
| 21 | + |
| 22 | +#define FILE_SIZE (1024 * 1024) |
| 23 | +#define RECORD_SIZE (128 * 1024) |
| 24 | +#define NUM_THREADS 64 |
| 25 | + |
| 26 | +const char *dir; |
| 27 | +volatile int failed; |
| 28 | + |
| 29 | +static void * |
| 30 | +run_test(void *arg) |
| 31 | +{ |
| 32 | + int thread_id = (int)(long)arg; |
| 33 | + |
| 34 | + char src_path[PATH_MAX], dst_path[PATH_MAX]; |
| 35 | + snprintf(src_path, PATH_MAX, "%s/src-%d", dir, thread_id); |
| 36 | + snprintf(dst_path, PATH_MAX, "%s/dst-%d", dir, thread_id); |
| 37 | + |
| 38 | + unsigned char *write_buf = malloc(FILE_SIZE); |
| 39 | + unsigned char *read_buf = malloc(FILE_SIZE); |
| 40 | + |
| 41 | + // Write out expected data. |
| 42 | + memset(write_buf, 0xAA, FILE_SIZE); |
| 43 | + int src = open(src_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| 44 | + if (write(src, write_buf, FILE_SIZE) != FILE_SIZE) |
| 45 | + perror("write"); |
| 46 | + close(src); |
| 47 | + |
| 48 | + // Create destination file so we exercise O_TRUNC. |
| 49 | + int dst = open(dst_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| 50 | + if (write(dst, write_buf, FILE_SIZE) != FILE_SIZE) |
| 51 | + perror("write"); |
| 52 | + fsync(dst); |
| 53 | + close(dst); |
| 54 | + |
| 55 | + // Open file with O_TRUNC and perform copy. |
| 56 | + src = open(src_path, O_RDONLY); |
| 57 | + dst = open(dst_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| 58 | + |
| 59 | + off_t off_in = 0, off_out = 0; |
| 60 | + ssize_t ret = |
| 61 | + copy_file_range(src, &off_in, dst, &off_out, FILE_SIZE, 0); |
| 62 | + if (ret != FILE_SIZE) |
| 63 | + perror("copy_file_range"); |
| 64 | + close(src); |
| 65 | + close(dst); |
| 66 | + |
| 67 | + // Read back |
| 68 | + dst = open(dst_path, O_RDONLY); |
| 69 | + if (read(dst, read_buf, FILE_SIZE) != FILE_SIZE) |
| 70 | + perror("read"); |
| 71 | + close(dst); |
| 72 | + |
| 73 | + // Bug check |
| 74 | + if (memcmp(write_buf, read_buf, FILE_SIZE) != 0) { |
| 75 | + failed = 1; |
| 76 | + fprintf(stderr, "[%d]: FAIL\n", thread_id); |
| 77 | + |
| 78 | + int all_zeros = 1; |
| 79 | + for (int i = 0; i < RECORD_SIZE; i++) { |
| 80 | + if (read_buf[i] != 0) { |
| 81 | + all_zeros = 0; |
| 82 | + break; |
| 83 | + } |
| 84 | + } |
| 85 | + |
| 86 | + if (all_zeros) { |
| 87 | + fprintf(stderr, "[%d]: ALL ZERO\n", thread_id); |
| 88 | + } |
| 89 | + } |
| 90 | + |
| 91 | + unlink(src_path); |
| 92 | + unlink(dst_path); |
| 93 | + free(write_buf); |
| 94 | + free(read_buf); |
| 95 | + return (NULL); |
| 96 | +} |
| 97 | + |
| 98 | +int |
| 99 | +main(int argc, const char **argv) |
| 100 | +{ |
| 101 | + if (argc < 2) { |
| 102 | + fprintf(stderr, "usage: %s <dir>\n", argv[0]); |
| 103 | + return (1); |
| 104 | + } |
| 105 | + dir = argv[1]; |
| 106 | + |
| 107 | + pthread_t threads[NUM_THREADS]; |
| 108 | + |
| 109 | + for (int i = 0; i < NUM_THREADS; i++) { |
| 110 | + pthread_create(&threads[i], NULL, run_test, (void *)(long)i); |
| 111 | + } |
| 112 | + for (int i = 0; i < NUM_THREADS; i++) { |
| 113 | + pthread_join(threads[i], NULL); |
| 114 | + } |
| 115 | + |
| 116 | + return (failed); |
| 117 | +} |
0 commit comments