ext2_io.h (io_channel_write_byte): Add new interface to allow callers
to write specific byte ranges. This is an optional interface, which
not all IO channels may implement.
unix_io.c (unix_write_byte): test_io.c (test_write_byte): Add
implementation of the write_byte function.
closefs.c (write_primary_superblock, ext2fs_flush): Add a new function
which writes the primary superblock. If the IO channel supports
writing raw bytes directly, only fields which were modified are
written to the disk. This makes it safe(r) to use utilities like
tune2fs on a mounted filesystem.
freefs.c (ext2fs_free): Free the original superblock if it is available.
openfs.c (ext2fs_open): Store a copy of the original superblock when
opening it.
ext2fs.h: Add a field to store the original superblock in the ext2
context structure.
ext2_io.h, ext2fs.h: Protect against being included multiple times.
bmove.c: #include ext2fsP.h instead of "ext2fs/ext2fs.h"
test_io.c (test_flush): Add a debugging printf when the flush method
is called.
rw_bitmaps.c (ext2fs_read_bitmaps): If the bitmaps are already read
in, return right away.
Theodore Ts'o