fs: fat: extend get_fs_info() for write use
get_fs_info() was introduced in major re-work of read operation by Rob.
We want to reuse this function in write operation by extending it with
additional members in fsdata structure.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 4b722fc..5f921e8 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -558,10 +558,17 @@
if (mydata->fatsize == 32) {
mydata->fatlength = bs.fat32_length;
+ mydata->total_sect = bs.total_sect;
} else {
mydata->fatlength = bs.fat_length;
+ mydata->total_sect = (bs.sectors[1] << 8) + bs.sectors[0];
+ if (!mydata->total_sect)
+ mydata->total_sect = bs.total_sect;
}
+ if (!mydata->total_sect) /* unlikely */
+ mydata->total_sect = (u32)cur_part_info.size;
+ mydata->fats = bs.fats;
mydata->fat_sect = bs.reserved;
mydata->rootdir_sect = mydata->fat_sect + mydata->fatlength * bs.fats;
diff --git a/include/fat.h b/include/fat.h
index 09e1423..a236451 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -173,6 +173,8 @@
int fatbufnum; /* Used by get_fatent, init to -1 */
int rootdir_size; /* Size of root dir for non-FAT32 */
__u32 root_cluster; /* First cluster of root dir for FAT32 */
+ u32 total_sect; /* Number of sectors */
+ int fats; /* Number of FATs */
} fsdata;
static inline u32 clust_to_sect(fsdata *fsdata, u32 clust)