[f2fs-dev] [PATCH] f2fs_io: support checkpoint command

[Chao Yu <chao@kernel.org>]

This patch supports a new sub-command 'checkpoint' in f2fs_io to
trigger filesystem checkpoint via F2FS_IOC_WRITE_CHECKPOINT ioctl.

Signed-off-by: Chao Yu <chao@kernel.org>
---
 man/f2fs_io.8           |  3 +++
 tools/f2fs_io/f2fs_io.c | 25 +++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/man/f2fs_io.8 b/man/f2fs_io.8
index 33789c2..f1a48ca 100644
--- a/man/f2fs_io.8
+++ b/man/f2fs_io.8
@@ -135,6 +135,9 @@ Reserve free blocks to prepare decompressing blocks in the file.
 .TP
 \fBgc\fR \fI[sync_mode] [file]\fR
 Trigger filesystem GC
+.TP
+\fBcheckpoint\fR \fI[file]\fR
+Trigger filesystem checkpoint
 .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 6dcd840..9cfca71 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -1310,6 +1310,30 @@ static void do_gc(int argc, char **argv, const struct cmd_desc *cmd)
 	exit(0);
 }
 
+#define checkpoint_desc "trigger filesystem checkpoint"
+#define checkpoint_help "f2fs_io checkpoint [file_path]\n\n"
+
+static void do_checkpoint(int argc, char **argv, const struct cmd_desc *cmd)
+{
+	int ret, fd;
+
+	if (argc != 2) {
+		fputs("Excess arguments\n\n", stderr);
+		fputs(cmd->cmd_help, stderr);
+		exit(1);
+	}
+
+	fd = xopen(argv[1], O_WRONLY, 0);
+
+	ret = ioctl(fd, F2FS_IOC_WRITE_CHECKPOINT);
+	if (ret < 0)
+		die_errno("F2FS_IOC_WRITE_CHECKPOINT failed");
+
+	printf("trigger filesystem checkpoint 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 }
@@ -1342,6 +1366,7 @@ const struct cmd_desc cmd_list[] = {
 	CMD(get_filename_encrypt_mode),
 	CMD(rename),
 	CMD(gc),
+	CMD(checkpoint),
 	{ NULL, NULL, NULL, NULL, 0 }
 };
 
-- 
2.25.1



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