f2fs_io: support defrag_file

Support 'defrag_file' sub command to trigger file based defragment via
ioctl in f2fs.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index f087da4..a5a9836 100644 (file)
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -442,6 +442,45 @@ static void do_gc_urgent(int argc, char **argv, const struct cmd_desc *cmd)
        }
 }
 
+#define defrag_file_desc "do defragment on file"
+#define defrag_file_help                                               \
+"f2fs_io defrag_file [start] [length] [file_path]\n\n"         \
+"  start     : start offset of defragment region, unit: bytes\n"       \
+"  length    : bytes number of defragment region\n"                    \
+
+static void do_defrag_file(int argc, char **argv, const struct cmd_desc *cmd)
+{
+       struct f2fs_defragment df;
+       u64 len;
+       int ret, fd;
+
+       if (argc != 4) {
+               fputs("Excess arguments\n\n", stderr);
+               fputs(cmd->cmd_help, stderr);
+               exit(1);
+       }
+
+       df.start = atoll(argv[1]);
+       df.len = len = atoll(argv[2]);
+
+       fd = open(argv[3], O_RDWR);
+       if (fd == -1) {
+               fputs("Open failed\n\n", stderr);
+               fputs(cmd->cmd_help, stderr);
+               exit(1);
+       }
+
+       ret = ioctl(fd, F2FS_IOC_DEFRAGMENT, &df);
+       if (ret < 0) {
+               perror("F2FS_IOC_DEFRAGMENT");
+               exit(1);
+       }
+       printf("defrag %s in region[%"PRIu64", %"PRIu64"]\n",
+                       argv[3], df.start, df.start + len);
+       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 }
@@ -456,6 +495,7 @@ const struct cmd_desc cmd_list[] = {
        CMD(read),
        CMD(fiemap),
        CMD(gc_urgent),
+       CMD(defrag_file),
        { NULL, NULL, NULL, NULL, 0 }
 };