freebsd-nq/sys/miscfs/specfs
Poul-Henning Kamp 0375c9f2b8 Add a new vnode op, VOP_FREEBLKS(), which filesystems can use to inform
device drivers about sectors no longer in use.

Device-drivers receive the call through d_strategy, if they have
D_CANFREE in d_flags.

This allows flash based devices to erase the sectors and avoid
pointlessly carrying them around in compactions.

Reviewed by:	Kirk Mckusick, bde
Sponsored by:	M-Systems (www.m-sys.com)
1998-09-05 14:13:12 +00:00
..
spec_vnops.c Add a new vnode op, VOP_FREEBLKS(), which filesystems can use to inform 1998-09-05 14:13:12 +00:00
specdev.h Add changes and code to implement a functional DEVFS. 1998-04-19 23:32:49 +00:00