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 --- fs/fat/fat.c | 7 +++++++ include/fat.h | 2 ++ 2 files changed, 9 insertions(+)
diff --git a/fs/fat/fat.c b/fs/fat/fat.c index 4efe8a3edaf1..0576658dde09 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -558,10 +558,17 @@ static int get_fs_info(fsdata *mydata)
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 c02839dcb040..127e6622a9b0 100644 --- a/include/fat.h +++ b/include/fat.h @@ -175,6 +175,8 @@ typedef struct { 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)