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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 |
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| .. | ||
| audit.c | ||
| audit.h | ||
| audit_arg.c | ||
| audit_bsm.c | ||
| audit_bsm_db.c | ||
| audit_bsm_klib.c | ||
| audit_dtrace.c | ||
| audit_ioctl.h | ||
| audit_pipe.c | ||
| audit_private.h | ||
| audit_syscalls.c | ||
| audit_trigger.c | ||
| audit_worker.c | ||
| bsm_domain.c | ||
| bsm_errno.c | ||
| bsm_fcntl.c | ||
| bsm_socket_type.c | ||
| bsm_token.c | ||