linux-kernel - [PATCH] f2fs_io: support move

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Date:   Thu,  4 May 2023 22:44:06 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     jaegeuk@...nel.org
Cc:     chao@...nel.org, linux-f2fs-devel@...ts.sourceforge.net,
        Yangtao Li <frank.li@...o.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] f2fs_io: support move_range command

This patch supports a new sub-command 'move_range' in f2fs_io
to move a range of data blocks from source file to destination
file via F2FS_IOC_MOVE_RANGE ioctl.

Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 man/f2fs_io.8           |  4 ++++
 tools/f2fs_io/f2fs_io.c | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/man/f2fs_io.8 b/man/f2fs_io.8
index 13d4bf3..b25f807 100644
--- a/man/f2fs_io.8
+++ b/man/f2fs_io.8
@@ -138,8 +138,12 @@ Trigger filesystem GC
 .TP
 \fBcheckpoint\fR \fI[file]\fR
 Trigger filesystem checkpoint
+.TP
 \fBprecache_extents\fR \fI[file]\fR
 Trigger precache extents
+.TP
+\fBmove_range\fR \fI[src_path] [dst_path] [src_start] [dst_start] [length]\fR
+Move a range of data blocks from source file to destination file
 .SH AUTHOR
 This version of
 .B f2fs_io
diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index ac7b588..d545d8e 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -1357,6 +1357,40 @@ static void do_precache_extents(int argc, char **argv, const struct cmd_desc *cm
 	exit(0);
 }
 
+#define move_range_desc "moving a range of data blocks from source file to destination file"
+#define move_range_help						\
+"f2fs_io move_range [src_path] [dst_path] [src_start] [dst_start] [length]\n\n"		\
+"  src_path  : path to source file\n"					\
+"  dst_path  : path to destination file\n"				\
+"  src_start : start offset of src file move region, unit: bytes\n"	\
+"  dst_start : start offset of dst file move region, unit: bytes\n"	\
+"  length    : size to move\n"						\
+
+static void do_move_range(int argc, char **argv, const struct cmd_desc *cmd)
+{
+	struct f2fs_move_range range;
+	int ret, fd;
+
+	if (argc != 6) {
+		fputs("Excess arguments\n\n", stderr);
+		fputs(cmd->cmd_help, stderr);
+		exit(1);
+	}
+
+	fd = xopen(argv[1], O_RDWR, 0);
+	range.dst_fd = xopen(argv[2], O_RDWR | O_CREAT, 0644);
+	range.pos_in = atoi(argv[3]);
+	range.pos_out = atoi(argv[4]);
+	range.len = atoi(argv[5]);
+
+	ret = ioctl(fd, F2FS_IOC_MOVE_RANGE, &range);
+	if (ret < 0)
+		die_errno("F2FS_IOC_MOVE_RANGE failed");
+
+	printf("move range ret=%d\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 }
@@ -1391,6 +1425,7 @@ const struct cmd_desc cmd_list[] = {
 	CMD(gc),
 	CMD(checkpoint),
 	CMD(precache_extents),
+	CMD(move_range),
 	{ NULL, NULL, NULL, NULL, 0 }
 };
 
-- 
2.39.0