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 <Chaitanya.Kulkarni@xxxxxxx>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>
---
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
