zbdioctl implements calls to zoned block devices ioctls that are not supported currently by sys-utils blkzone utility, namely BLKGETZONESZ and BLKGETNRZONES.
Reviewed-by: Chaitanya Kulkarni <[email protected]> Signed-off-by: Shin'ichiro Kawasaki <[email protected]> --- src/.gitignore | 1 + src/Makefile | 3 +- src/zbdioctl.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 86 insertions(+), 1 deletion(-) create mode 100644 src/zbdioctl.c diff --git a/src/.gitignore b/src/.gitignore index 8c95785..2108f56 100644 --- a/src/.gitignore +++ b/src/.gitignore @@ -6,3 +6,4 @@ /nbdsetsize /sg/dxfer-from-dev /sg/syzkaller1 +/zbdioctl diff --git a/src/Makefile b/src/Makefile index c4094b4..5a0556f 100644 --- a/src/Makefile +++ b/src/Makefile @@ -5,7 +5,8 @@ C_TARGETS := \ sg/dxfer-from-dev \ sg/syzkaller1 \ nbdsetsize \ - loop_change_fd + loop_change_fd \ + zbdioctl CXX_TARGETS := \ discontiguous-io diff --git a/src/zbdioctl.c b/src/zbdioctl.c new file mode 100644 index 0000000..1ea72e8 --- /dev/null +++ b/src/zbdioctl.c @@ -0,0 +1,83 @@ +// SPDX-License-Identifier: GPL-3.0+ +// Copyright (C) 2018 Western Digital Corporation or its affiliates. +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <fcntl.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <linux/blkzoned.h> +#include <linux/types.h> + +#if !defined(BLKGETZONESZ) || !defined(BLKGETNRZONES) + +int main(int argc, char **argv) +{ + return EXIT_FAILURE; +} + +#else + +struct request { + const char *name; + unsigned long code; +} requests[] = { + { "-s", BLKGETZONESZ}, + { "-n", BLKGETNRZONES}, + { NULL, 0}, +}; + +void usage(const char *progname) +{ + int i = 0; + + fprintf(stderr, "usage: %s <request> <device file>\n", progname); + fprintf(stderr, "<request> can be:\n"); + while (requests[i].name) { + fprintf(stderr, "\t%s\n", requests[i].name); + i++; + } + exit(EXIT_FAILURE); +} + +int main(int argc, char **argv) +{ + int i = 0, fd, ret; + unsigned int val; + unsigned long code = 0; + + if (argc != 3) + usage(argv[0]); + + while (requests[i].name) { + if (strcmp(argv[1], requests[i].name) == 0) { + code = requests[i].code; + break; + } + i++; + } + if (code == 0) + usage(argv[0]); + + fd = open(argv[2], O_RDWR); + if (fd < 0) { + perror("open"); + return EXIT_FAILURE; + } + + ret = ioctl(fd, code, &val); + if (ret < 0) { + perror("ioctl"); + close(fd); + return EXIT_FAILURE; + } + + printf("%u\n", val); + + close(fd); + + return EXIT_SUCCESS; +} + +#endif + -- 2.20.1
