To test read/write between a mmap area of one file and another file directly, with different size.
Signed-off-by: Xiong Zhou <[email protected]> --- .gitignore | 1 + src/Makefile | 2 +- src/t_mmap_dio.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 83 insertions(+), 1 deletion(-) create mode 100644 src/t_mmap_dio.c diff --git a/.gitignore b/.gitignore index 7dcea14..48a40a0 100644 --- a/.gitignore +++ b/.gitignore @@ -129,6 +129,7 @@ /src/cloner /src/renameat2 /src/t_rename_overwrite +/src/t_mmap_dio # dmapi/ binaries /dmapi/src/common/cmd/read_invis diff --git a/src/Makefile b/src/Makefile index 94d74aa..eb5a56c 100644 --- a/src/Makefile +++ b/src/Makefile @@ -12,7 +12,7 @@ TARGETS = dirstress fill fill2 getpagesize holes lstat64 \ godown resvtest writemod makeextents itrash rename \ multi_open_unlink dmiperf unwritten_sync genhashnames t_holes \ t_mmap_writev t_truncate_cmtime dirhash_collide t_rename_overwrite \ - holetest t_truncate_self + holetest t_truncate_self t_mmap_dio LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ diff --git a/src/t_mmap_dio.c b/src/t_mmap_dio.c new file mode 100644 index 0000000..545e900 --- /dev/null +++ b/src/t_mmap_dio.c @@ -0,0 +1,81 @@ +/* + * This programme was originally written by + * Jeff Moyer <[email protected]> + */ +#define _GNU_SOURCE 1 +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/mman.h> +#include <libaio.h> +#include <errno.h> +#include <sys/time.h> + +void usage(char *prog) +{ + fprintf(stderr, + "usage: %s <source file> <dest file> <test size>\n", + prog); + exit(1); +} + +void err_exit(char *op, unsigned long len) +{ + fprintf(stderr, "%s(%s) len %lu\n", + op, strerror(errno), len); + exit(1); +} + +int main(int argc, char **argv) +{ + int fd, fd2, ret; + char *map; + unsigned long len; + + if (argc < 3) + usage(basename(argv[0])); + + len = strtoul(argv[3], NULL, 10); + if (errno == ERANGE) + err_exit("strtoul", 0); + + /* Open source file and mmap*/ + fd = open(argv[1], O_RDWR, 0644); + if (fd < 0) + err_exit("open s", len); + + map = (char *)mmap(NULL, len, + PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); + if (map == MAP_FAILED) + err_exit("mmap", len); + + /* Open dest file with O_DIRECT */ + fd2 = open(argv[2], O_RDWR|O_DIRECT, 0644); + if (fd2 < 0) + err_exit("open d", len); + + /* First, test storing to dest file from source mapping */ + ret = write(fd2, map, len); + if (ret != len) + err_exit("write", len); + + ret = (int)lseek(fd2, 0, SEEK_SET); + if (ret == -1) + err_exit("lseek", len); + + /* Next, test reading from dest file into source mapping */ + ret = read(fd2, map, len); + if (ret != len) + err_exit("read", len); + ret = msync(map, len, MS_SYNC); + if (ret < 0) + err_exit("msync", len); + + ret = munmap(map, len); + if (ret < 0) + err_exit("munmap", len); + + exit(0); +} -- 1.8.3.1 _______________________________________________ Linux-nvdimm mailing list [email protected] https://lists.01.org/mailman/listinfo/linux-nvdimm
