f2fs_io: add pin_file control command

This requires a kernel patch "f2fs: export pin_file flag to user".

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 9c3863d..c39273e 100644 (file)
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -75,6 +75,58 @@ static void do_shutdown(int argc, char **argv, const struct cmd_desc *cmd)
        exit(0);
 }
 
+#define pinfile_desc "pin file control"
+#define pinfile_help                                           \
+"f2fs_io pinfile [get|set] [file]\n\n"                 \
+"get/set pinning given the file\n"                             \
+
+static void do_pinfile(int argc, char **argv, const struct cmd_desc *cmd)
+{
+       u32 pin;
+       int ret, fd;
+
+       if (argc != 3) {
+               fputs("Excess arguments\n\n", stderr);
+               fputs(cmd->cmd_help, stderr);
+               exit(1);
+       }
+
+       fd = open(argv[2], O_RDWR);
+       if (fd == -1) {
+               fputs("Open failed\n\n", stderr);
+               fputs(cmd->cmd_help, stderr);
+               exit(1);
+       }
+
+       ret = -1;
+       if (!strcmp(argv[1], "set")) {
+               pin = 1;
+               ret = ioctl(fd, F2FS_IOC_SET_PIN_FILE, &pin);
+               if (ret != 0) {
+                       perror("set_pin_file failed");
+                       exit(1);
+               }
+               printf("set_pin_file: %u blocks moved in %s\n", ret, argv[2]);
+       } else if (!strcmp(argv[1], "get")) {
+               unsigned int flags;
+
+               ret = ioctl(fd, F2FS_IOC_GET_PIN_FILE, &pin);
+               if (ret < 0) {
+                       perror("pin_file failed");
+                       exit(1);
+               }
+               ret = ioctl(fd, F2FS_IOC_GETFLAGS, &flags);
+               if (ret < 0) {
+                       perror("get flags failed");
+                       exit(1);
+               }
+               printf("get_pin_file: %s with %u blocks moved in %s\n",
+                               (flags & F2FS_NOCOW_FL) ? "pinned" : "un-pinned",
+                               pin, argv[2]);
+       }
+       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 }
@@ -83,6 +135,7 @@ static void do_help(int argc, char **argv, const struct cmd_desc *cmd);
 const struct cmd_desc cmd_list[] = {
        _CMD(help),
        CMD(shutdown),
+       CMD(pinfile),
        { NULL, NULL, NULL, NULL, 0 }
 };
 

diff --git a/tools/f2fs_io/f2fs_io.h b/tools/f2fs_io/f2fs_io.h
index a02ff2d..6b619bd 100644 (file)
--- a/tools/f2fs_io/f2fs_io.h
+++ b/tools/f2fs_io/f2fs_io.h
@@ -36,7 +36,13 @@ typedef u16  __be16;
 typedef u32    __be32;
 #endif
 
+#ifndef FS_IOC_GETFLAGS
+#define FS_IOC_GETFLAGS                        _IOR('f', 1, long)
+#endif
+
 #define F2FS_IOCTL_MAGIC               0xf5
+#define F2FS_IOC_GETFLAGS              FS_IOC_GETFLAGS
+
 #define F2FS_IOC_START_ATOMIC_WRITE    _IO(F2FS_IOCTL_MAGIC, 1)
 #define F2FS_IOC_COMMIT_ATOMIC_WRITE   _IO(F2FS_IOCTL_MAGIC, 2)
 #define F2FS_IOC_START_VOLATILE_WRITE  _IO(F2FS_IOCTL_MAGIC, 3)
@@ -62,6 +68,11 @@ typedef u32  __be32;
 #define F2FS_IOC_GET_ENCRYPTION_PWSALT FS_IOC_GET_ENCRYPTION_PWSALT
 
 /*
+ * Inode flags
+ */
+#define F2FS_NOCOW_FL                  0x00800000 /* Do not cow file */
+
+/*
  * should be same as XFS_IOC_GOINGDOWN.
  * Flags for going down operation used by FS_IOC_GOINGDOWN
  */