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@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/man/f2fs_io.8 b/man/f2fs_io.8
index 13d4bf3..b25f807 100644 (file)
--- 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..126e1f9 100644 (file)
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -1357,6 +1357,41 @@ 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 +1426,7 @@ const struct cmd_desc cmd_list[] = {
        CMD(gc),
        CMD(checkpoint),
        CMD(precache_extents),
+       CMD(move_range),
        { NULL, NULL, NULL, NULL, 0 }
 };