From 627182ea9d0f157f7280aa650dd4c06461b20c3e Mon Sep 17 00:00:00 2001 From: Donggeun Kim Date: Tue, 20 Dec 2011 18:34:27 +0000 Subject: [PATCH] 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 Signed-off-by: Kyungmin Park --- fs/fat/fat_write.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c index 3542b0bcbd..3bfc1c4b32 100644 --- a/fs/fat/fat_write.c +++ b/fs/fat/fat_write.c @@ -112,6 +112,7 @@ static void set_name(dir_entry *dirent, const char *filename) debug("ext : %s\n", dirent->ext); } +static __u8 num_of_fats; /* * Write fat buffer into block device */ @@ -134,6 +135,15 @@ static int flush_fat_buffer(fsdata *mydata) 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 @@ static int do_fat_write(const char *filename, void *buffer, 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; -- 2.25.1