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1b7e8828d6
Fix and unifying the stat() syscall in the VFS. Fix the ftruncate() syscalls in the FAT and VFS. Signed-off-by: Lucjan Bryndza <lucjan.bryndza@mudita.com>
Virtual File System for PurePhone
What does this module provide?
We use POSIX calls wrapper to have proper filesystem experience and it supports C++17 filesystem library.
File systems in use
Right now we are able to use 3 file systems:
- FAT-FS
- Ext4 with 32 bit inodes.
- LittleFS
Curently only the FAT and EXT4 filesystems are used on the mass storage media.
PurePhone partitions
PurePhone uses old MBR partitioning scheme and it has 3 flash partitions:
- FAT for the phone firmware (ReadOnly)
- EXT4 for the backup data
- EXT4 for the user data
EXT4 partition is needed to assert minimal to possibly no data loss in unexpected shutdown LFS can be used as an alternative user partition. Currently it is not used by the MuditaOS except internal EEPROM memory.
how to use PurePhone partitions
Pure phone on reboot on option 9 will present itself with 3 partitions via USB, all partitions should be automount.
mounting FAT-FS and EXT4 partitions
- check which devices are PurePhone block devices ie with:
dmesgorlsblk - mount them with i.e
udisksctl mount -b /dev/sdbXwhere X is number of block device
mounting LittleFS partitions
For LittleFS you will have to use fuse to mount partition. Tool is already build with release and is ready to use:
- Prepare mount point i.e. create catalog
mkdir mymount - Mount:
./lfsfuse --block_size=32768 /dev/sdX mymountwhere sdbx is device where you expect LFS partition - Enter here and play with data
- Umount and eject the device i.e. with:
udisksctl power-off -b /dev/sdb