fsck.f2fs: trigger fsck.f2fs when new change was made

This patch remains user specified triggering information in superblock.
Then, if the information was changed, fsck.f2fs is triggered.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 30 insertions, 1 deletions

diff --git a/fsck/mount.c b/fsck/mount.c
index 9a9c842..37bd8c7 100644
--- a/fsck/mount.c
+++ b/fsck/mount.c
@@ -133,6 +133,7 @@ void print_raw_sb_info(struct f2fs_sb_info *sbi)
 	DISP_u32(sb, node_ino);
 	DISP_u32(sb, meta_ino);
 	DISP_u32(sb, cp_payload);
+	DISP("%s", sb, version);
 	printf("\n");
 }
 
@@ -225,6 +226,7 @@ int sanity_check_raw_super(struct f2fs_super_block *raw_super)
 int validate_super_block(struct f2fs_sb_info *sbi, int block)
 {
 	u64 offset;
+
 	sbi->raw_super = malloc(sizeof(struct f2fs_super_block));
 
 	if (block == 0)
@@ -235,8 +237,35 @@ int validate_super_block(struct f2fs_sb_info *sbi, int block)
 	if (dev_read(sbi->raw_super, offset, sizeof(struct f2fs_super_block)))
 		return -1;
 
-	if (!sanity_check_raw_super(sbi->raw_super))
+	if (!sanity_check_raw_super(sbi->raw_super)) {
+		/* get kernel version */
+		if (config.kd >= 0) {
+			dev_read_version(config.version, 0, VERSION_LEN);
+			get_kernel_version(config.version);
+		} else {
+			memset(config.version, 0, VERSION_LEN);
+		}
+
+		/* build sb version */
+		memcpy(config.sb_version, sbi->raw_super->version, VERSION_LEN);
+		get_kernel_version(config.sb_version);
+
+		MSG(0, "Info: FSCK version\n  from \"%s\"\n    to \"%s\"\n",
+					config.sb_version, config.version);
+		if (memcmp(config.sb_version, config.version, VERSION_LEN)) {
+			int ret;
+
+			memcpy(sbi->raw_super->version,
+						config.version, VERSION_LEN);
+			ret = dev_write(sbi->raw_super, offset,
+					sizeof(struct f2fs_super_block));
+			ASSERT(ret >= 0);
+
+			config.auto_fix = 0;
+			config.fix_on = 1;
+		}
 		return 0;
+	}
 
 	free(sbi->raw_super);
 	MSG(0, "\tCan't find a valid F2FS superblock at 0x%x\n", block);