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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 09:25:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 09:25:10 +0000 |
commit | 5dced3d1b3deca80e01415a2e35dc7972dcbfae7 (patch) | |
tree | 6a403684e0978f0287d7f0ec0e5aab1fd31a59e1 /tests/progs/random_exercise.c | |
parent | Initial commit. (diff) | |
download | e2fsprogs-5dced3d1b3deca80e01415a2e35dc7972dcbfae7.tar.xz e2fsprogs-5dced3d1b3deca80e01415a2e35dc7972dcbfae7.zip |
Adding upstream version 1.47.0.upstream/1.47.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/progs/random_exercise.c')
-rw-r--r-- | tests/progs/random_exercise.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/tests/progs/random_exercise.c b/tests/progs/random_exercise.c new file mode 100644 index 0000000..38217ab --- /dev/null +++ b/tests/progs/random_exercise.c @@ -0,0 +1,171 @@ +/* + * random_exercise.c --- Test program which exercises an ext2 + * filesystem. It creates a lot of random files in the current + * directory, while holding some files open while they are being + * deleted. This exercises the orphan list code, as well as + * creating lots of fodder for the ext3 journal. + * + * Copyright (C) 2000 Theodore Ts'o. + * + * %Begin-Header% + * This file may be redistributed under the terms of the GNU Public + * License. + * %End-Header% + */ + +#include "config.h" +#include <unistd.h> +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> + +#define MAXFDS 128 + +struct state { + char name[16]; + int state; + int isdir; +}; + +#define STATE_CLEAR 0 +#define STATE_CREATED 1 +#define STATE_DELETED 2 + +struct state state_array[MAXFDS]; + +#define DATA_SIZE 65536 + +char data_buffer[DATA_SIZE]; + +void clear_state_array() +{ + int i; + + for (i = 0; i < MAXFDS; i++) + state_array[i].state = STATE_CLEAR; +} + +int get_random_fd() +{ + int fd; + + while (1) { + fd = ((int) random()) % MAXFDS; + if (fd > 2) + return fd; + } +} + +unsigned int get_inode_num(int fd) +{ + struct stat st; + + if (fstat(fd, &st) < 0) { + perror("fstat"); + return 0; + } + return st.st_ino; +} + + +void create_random_file() +{ + char template[16] = "EX.XXXXXX"; + int fd; + int isdir = 0; + int size; + + mktemp(template); + isdir = random() & 1; + if (isdir) { + if (mkdir(template, 0700) < 0) + return; + fd = open(template, O_RDONLY, 0600); + printf("Created temp directory %s, fd = %d\n", + template, fd); + } else { + size = random() & (DATA_SIZE-1); + fd = open(template, O_CREAT|O_RDWR, 0600); + write(fd, data_buffer, size); + printf("Created temp file %s, fd = %d, size=%d\n", + template, fd, size); + } + state_array[fd].isdir = isdir; + if (fd < 0) + return; + state_array[fd].isdir = isdir; + state_array[fd].state = STATE_CREATED; + strcpy(state_array[fd].name, template); +} + +void truncate_file(int fd) +{ + int size; + + size = random() & (DATA_SIZE-1); + + if (state_array[fd].isdir) + return; + + ftruncate(fd, size); + printf("Truncating temp file %s, fd = %d, ino=%u, size=%d\n", + state_array[fd].name, fd, get_inode_num(fd), size); +} + + +void unlink_file(int fd) +{ + char *filename = state_array[fd].name; + + printf("Deleting %s, fd = %d, ino = %u\n", filename, fd, + get_inode_num(fd)); + + if (state_array[fd].isdir) + rmdir(filename); + else + unlink(filename); + state_array[fd].state = STATE_DELETED; +} + +void close_file(int fd) +{ + char *filename = state_array[fd].name; + + printf("Closing %s, fd = %d, ino = %u\n", filename, fd, + get_inode_num(fd)); + + close(fd); + state_array[fd].state = STATE_CLEAR; +} + + +main(int argc, char **argv) +{ + int i, fd; + + memset(data_buffer, 0, sizeof(data_buffer)); + sprintf(data_buffer, "This is a test file created by the " + "random_exerciser program\n"); + + for (i=0; i < 100000; i++) { + fd = get_random_fd(); + switch (state_array[fd].state) { + case STATE_CLEAR: + create_random_file(); + break; + case STATE_CREATED: + if ((state_array[fd].isdir == 0) && + (random() & 2)) + truncate_file(fd); + else + unlink_file(fd); + break; + case STATE_DELETED: + close_file(fd); + break; + } + } +} + + |