On 02/15, Daeho Jeong wrote:
> From: Daeho Jeong <daehoje...@google.com>
>
> Added lseek command to support lseek() for SEEK_DATA and SEEK_HOLE.
>
> Signed-off-by: Daeho Jeong <daehoje...@google.com>
> ---
> tools/f2fs_io/f2fs_io.c | 38 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 38 insertions(+)
>
> diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
> index e7d286a..b5c5b97 100644
> --- a/tools/f2fs_io/f2fs_io.c
> +++ b/tools/f2fs_io/f2fs_io.c
> @@ -1630,6 +1630,43 @@ static void do_removexattr(int argc, char **argv,
> const struct cmd_desc *cmd)
> exit(0);
> }
>
> +#define lseek_desc "do lseek for SEEK_DATA or SEEK_HOLE for a file"
> +#define lseek_help \
> +"f2fs_io lseek [whence] [offset] [file_path]\n\n" \
> +"Do lseek file data in file_path\n" \
> +"whence can be\n" \
Can we also have all the other options as well?
> +" data : SEEK_DATA, return the file offset to the next data location
> from offset\n"\
> +" hole : SEEK_HOLE, return the file offset to the next hole from
> offset\n"
> +
> +static void do_lseek(int argc, char **argv, const struct cmd_desc *cmd)
> +{
> + int fd, whence;
> + off_t offset, ret;
> +
> + if (argc != 4) {
> + fputs("Excess arguments\n\n", stderr);
> + fputs(cmd->cmd_help, stderr);
> + exit(1);
> + }
> +
> + offset = atoi(argv[2]);
> +
> + if (!strcmp(argv[1], "data"))
> + whence = SEEK_DATA;
> + else if (!strcmp(argv[1], "hole"))
> + whence = SEEK_HOLE;
> + else
> + die("Wrong whence type");
> +
> + fd = xopen(argv[3], O_RDONLY, 0);
> +
> + ret = lseek(fd, offset, whence);
> + if (ret < 0)
> + die_errno("lseek failed");
> + printf("returned offset=%ld\n", ret);
> + exit(0);
> +}
> +
> #define CMD_HIDDEN 0x0001
> #define CMD(name) { #name, do_##name, name##_desc, name##_help, 0 }
> #define _CMD(name) { #name, do_##name, NULL, NULL, CMD_HIDDEN }
> @@ -1671,6 +1708,7 @@ const struct cmd_desc cmd_list[] = {
> CMD(listxattr),
> CMD(setxattr),
> CMD(removexattr),
> + CMD(lseek),
> { NULL, NULL, NULL, NULL, 0 }
> };
>
> --
> 2.43.0.687.g38aa6559b0-goog
>
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
