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By popular demand, implement support for automatically detecting the sector count and sector size at run-time, as an alternative to specifying those values at compile-time.
This change is backward compatible with old redconf.c/redconf.h configuration files, which will continue to work as before. The configuration files only need to be updated if enabling this new feature is desired. To enable the feature, download the v2.5 version of the Reliance Edge Configuration Utility and select the "Auto" checkbox for the sector count or sector size.
Related to this change, a new file has been added to Reliance Edge: bdev/bdev.c. If you have your own build system or project which lists all the Reliance Edge source files, please update it to include this new file.
The block device OS service (osbdev.c) has a new API to query the sector count and sector size: RedOsBDevGetGeometry(). If you implemented your own version of osbdev.c for a previous version of Reliance Edge, to update to v2.5 you must add an implemention of this new API. See os/stub/services/osbdev.c for a template. If you do not need the new feature, the API can be stubbed to return -RED_ENOTSUPP.
Implement a block allocation optimization that improves write performance in some circumstances.
Add red_umount2() to the POSIX-like API. It is similar to red_umount() except that unmount flags can be specified. A flag is provided to force an unmount even if there are open handles.
FreeRTOS Port Changes
Remove the F_DRIVER example implementation of the block device service, which was deemed obsolete because support for FAT SL was removed in FreeRTOS v10.
INTEGRITY Port Changes
Implement support for the MNT_RDONLY and MNT_NOTRIM flags, used with the mount() system call.
Implement support for the MNT_FORCE flag in the unmount() system call, which has the effect of forcing an unmount even if there are open handles.
Calling mount() when Reliance Edge is already mounted now fails and sets errno to EBUSY; whereas previously it did nothing and returned success. The new behavior is consistent with the behavior of the native file systems.
If mount() or unmount() is passed a mount point with extraneous trailing path separators, they now fail and set errno to EINVAL. This fixes a bug where using trailing path separators would seem to succeed, but the VFS would fail to update the mount point array correctly, which could cause problems for subsequent operations.
