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non-obvious, its time to simplify :-)
o Moving towards a simpler and more obviously correct interface
o Removed some fs operations in directories representing volumes
o Changed some file names
o Made things cleaner
more changes to follow...
o Changed dm_remove() to accept a struct mapped_device argument rather than
a name
o We no longer have to look up devices by name, the dcache handles that
nicely for us
o Fixed a bug where we were freeing a structure before we'd finished with
it.
o The name field in struct mapped_device is now only used in a very few
places in dm.c and will be replaced in future with a back reference to
the dentry rather than keeping the name in two places.
o dmfs-dir.c becomes dmfs-lv.c
o dmfs-file.c becomes dmfs-table.c
o A few tweeks and updates
The main reason for the slow progress on these files (which are not yet used
by the device mapper) is that we are working out what this interface should
look like as we go along.
Once this has evolved a bit further and in a state where it can be used we'll
announce it on the lists for further comment.
o Only one list of block devices for all tables
o Locking to ensure that block devices only get opened once
o Block device handling is now in dm-blkdev.c
o We open block devices when we create the tables and hold them open until
the table is destroyed (this prevents the module for the device being
unloaded after table parsing and before the table is used)
o We compute the hardsect size when the table is created rather than when
someone requests it.
Still to fix/change:
o Probably want to hash the device lists in dm-blkdev.c and also remove refs
to struct dm_bdev outside this file.
o Need to ensure that hardsect_size doesn't change when new tables are
swapped in (maybe this ought to be a per volume parameter and the tables
will only parse if they match the value for the volume?).
Things are changing fast here, so if you want a stable version of thic code
try checking out yesterdays.
o Moved the linear target into its own module (not really because it needs to
be there, but because its useful to have a simple example so people can see
what we are doing)
Btw, this needs testing properly.
