0dc332bff2
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 |
||
|---|---|---|
| .. | ||
| audit | ||
| mac | ||
| 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 | ||
| mac_veriexec_parser | ||