FAT: update the second FAT when writing a file
After susccessful write to the FAT partition,
fsck program may print warning message due to different FAT,
provided that the filesystem supports two FATs.
This patch makes the second FAT to be same with the first one
when writing a file.
Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c
index 3542b0b..3bfc1c4 100644
--- a/fs/fat/fat_write.c
+++ b/fs/fat/fat_write.c
@@ -112,6 +112,7 @@
debug("ext : %s\n", dirent->ext);
}
+static __u8 num_of_fats;
/*
* Write fat buffer into block device
*/
@@ -134,6 +135,15 @@
return -1;
}
+ if (num_of_fats == 2) {
+ /* Update corresponding second FAT blocks */
+ startblock += mydata->fatlength;
+ if (disk_write(startblock, getsize, bufptr) < 0) {
+ debug("error: writing second FAT blocks\n");
+ return -1;
+ }
+ }
+
return 0;
}
@@ -950,6 +960,7 @@
cursect = mydata->rootdir_sect
= mydata->fat_sect + mydata->fatlength * bs.fats;
+ num_of_fats = bs.fats;
mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];
mydata->clust_size = bs.cluster_size;