HardenedBSD/sys/security
Ka Ho Ng 0dc332bff2 Add fspacectl(2), vn_deallocate(9) and VOP_DEALLOCATE(9).
fspacectl(2) is a system call to provide space management support to
userspace applications. VOP_DEALLOCATE(9) is a VOP call to perform the
deallocation. vn_deallocate(9) is a public KPI for kmods' use.

The purpose of proposing a new system call, a KPI and a VOP call is to
allow bhyve or other hypervisor monitors to emulate the behavior of SCSI
UNMAP/NVMe DEALLOCATE on a plain file.

fspacectl(2) comprises of cmd and flags parameters to specify the
space management operation to be performed. Currently cmd has to be
SPACECTL_DEALLOC, and flags has to be 0.

fo_fspacectl is added to fileops.
VOP_DEALLOCATE(9) is added as a new VOP call. A trivial implementation
of VOP_DEALLOCATE(9) is provided.

Sponsored by:	The FreeBSD Foundation
Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D28347
2021-08-05 23:20:42 +08:00
..
audit Add fspacectl(2), vn_deallocate(9) and VOP_DEALLOCATE(9). 2021-08-05 23:20:42 +08:00
mac mac: cheaper check for ifnet_create_mbuf and ifnet_check_transmit 2021-06-29 15:06:45 +02:00
mac_biba
mac_bsdextended
mac_ifoff
mac_lomac
mac_mls
mac_none
mac_ntpd
mac_partition
mac_portacl
mac_seeotheruids
mac_stub
mac_test
mac_veriexec Fix mac_veriexec version mismatch 2021-07-29 11:05:13 +02:00
mac_veriexec_parser