doc/Host-tools-overview: tiffs-mkfs description updated The first version of tiffs-mkfs did not include a journal file in the created FFS, expecting the firmware to create it on first boot. All historical firmwares prior to a recent FC fix (2020-05) contain a bug in that code path, thus images made with the first version of tiffs-mkfs were only acceptable to very recent FC firmwares. tiffs-mkfs has now been extended to include an empty journal in the created FFS, thus the restriction of working with recent fw only has been lifted.

/*
 * extern declarations of global variables
 */

extern char *imgfile;
extern off_t imgfile_offset;
extern u32 eraseblk_size;
extern int total_blocks;
extern u32 total_ffs_size;
extern int index_blk_num, root_inode;
extern int inode_limit;
extern int verbose, verbose2;
extern int old_16bit_location;

extern u8 *image, *inode_block;
extern struct inode_info **inode_info;