f2fs_io: support precache_extents command

This patch supports a new sub-command 'precache_extents' in f2fs_io
to trigger precache extents via F2FS_IOC_PRECACHE_EXTENTS ioctl.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/man/f2fs_io.8 b/man/f2fs_io.8
index f1a48ca..13d4bf3 100644 (file)
--- a/man/f2fs_io.8
+++ b/man/f2fs_io.8
@@ -138,6 +138,8 @@ Trigger filesystem GC
 .TP
 \fBcheckpoint\fR \fI[file]\fR
 Trigger filesystem checkpoint
+\fBprecache_extents\fR \fI[file]\fR
+Trigger precache extents
 .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 8378bb5..ac7b588 100644 (file)
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -1334,6 +1334,28 @@ static void do_checkpoint(int argc, char **argv, const struct cmd_desc *cmd)
        exit(0);
 }
 
+#define precache_extents_desc "trigger precache extents"
+#define precache_extents_help "f2fs_io precache_extents [file_path]\n\n"
+
+static void do_precache_extents(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_PRECACHE_EXTENTS);
+       if (ret < 0)
+               die_errno("F2FS_IOC_PRECACHE_EXTENTS failed");
+
+       printf("trigger precache extents ret=%d\n", ret);
+       exit(0);
+}
 
 #define CMD_HIDDEN     0x0001
 #define CMD(name) { #name, do_##name, name##_desc, name##_help, 0 }
@@ -1368,6 +1390,7 @@ const struct cmd_desc cmd_list[] = {
        CMD(rename),
        CMD(gc),
        CMD(checkpoint),
+       CMD(precache_extents),
        { NULL, NULL, NULL, NULL, 0 }
 };