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f2fs_io: add erase option

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f2fs_io erase [block_device_path]

Signed-off-by: Ocean Chen <oceanchen@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Ocean Chen 2020-10-14 01:22:40 +08:00 committed by Jaegeuk Kim
parent e59bb175ac
commit 1bfc17340d
1 changed files with 52 additions and 1 deletions
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53
tools/f2fs_io/f2fs_io.c
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@ -24,13 +24,13 @@
#include <getopt.h>
#include <inttypes.h>
#include <limits.h>
#include <linux/fs.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/sendfile.h>
#include <sys/stat.h>
@ -434,6 +434,56 @@ static void do_fallocate(int argc, char **argv, const struct cmd_desc *cmd)
exit(0);
}
#define erase_desc "erase a block device"
#define erase_help \
"f2fs_io erase [block_device_path]\n\n" \
"Send DISCARD | BLKSECDISCARD comamnd to" \
"block device in block_device_path\n" \
static void do_erase(int argc, char **argv, const struct cmd_desc *cmd)
{
int fd, ret;
struct stat st;
u64 range[2];
if (argc != 2) {
fputs("Excess arguments\n\n", stderr);
fputs(cmd->cmd_help, stderr);
exit(1);
}
if (stat(argv[1], &st) != 0) {
fputs("stat error\n", stderr);
exit(1);
}
if (!S_ISBLK(st.st_mode)) {
fputs(argv[1], stderr);
fputs(" is not a block device\n", stderr);
exit(1);
}
fd = xopen(argv[1], O_WRONLY, 0);
range[0] = 0;
ret = ioctl(fd, BLKGETSIZE64, &range[1]);
if (ret < 0) {
fputs("get size failed\n", stderr);
exit(1);
}
ret = ioctl(fd, BLKSECDISCARD, &range);
if (ret < 0) {
ret = ioctl(fd, BLKDISCARD, &range);
if (ret < 0) {
fputs("Discard failed\n", stderr);
exit(1);
}
}
exit(0);
}
#define write_desc "write data into file"
#define write_help \
"f2fs_io write [chunk_size in 4kb] [offset in chunk_size] [count] [pattern] [IO] [file_path]\n\n" \
@ -957,6 +1007,7 @@ const struct cmd_desc cmd_list[] = {
CMD(shutdown),
CMD(pinfile),
CMD(fallocate),
CMD(erase),
CMD(write),
CMD(read),
CMD(randread),