mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-30 12:04:07 +00:00
1ba4a712dd
This bring huge amount of changes, I'll enumerate only user-visible changes: - Delegated Administration Allows regular users to perform ZFS operations, like file system creation, snapshot creation, etc. - L2ARC Level 2 cache for ZFS - allows to use additional disks for cache. Huge performance improvements mostly for random read of mostly static content. - slog Allow to use additional disks for ZFS Intent Log to speed up operations like fsync(2). - vfs.zfs.super_owner Allows regular users to perform privileged operations on files stored on ZFS file systems owned by him. Very careful with this one. - chflags(2) Not all the flags are supported. This still needs work. - ZFSBoot Support to boot off of ZFS pool. Not finished, AFAIK. Submitted by: dfr - Snapshot properties - New failure modes Before if write requested failed, system paniced. Now one can select from one of three failure modes: - panic - panic on write error - wait - wait for disk to reappear - continue - serve read requests if possible, block write requests - Refquota, refreservation properties Just quota and reservation properties, but don't count space consumed by children file systems, clones and snapshots. - Sparse volumes ZVOLs that don't reserve space in the pool. - External attributes Compatible with extattr(2). - NFSv4-ACLs Not sure about the status, might not be complete yet. Submitted by: trasz - Creation-time properties - Regression tests for zpool(8) command. Obtained from: OpenSolaris
123 lines
3.5 KiB
Groff
123 lines
3.5 KiB
Groff
.\" Copyright (c) 1995
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)kvm_getvfsbyname.3 8.3 (Berkeley) 5/4/95
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 5, 2007
|
|
.Dt GETVFSBYNAME 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm getvfsbyname
|
|
.Nd get information about a file system
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In sys/mount.h
|
|
.Ft int
|
|
.Fn getvfsbyname "const char *name" "struct xvfsconf *vfc"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn getvfsbyname
|
|
function provides access to information about a
|
|
file system module that is configured in the kernel.
|
|
If successful,
|
|
the requested file system
|
|
.Fa xvfsconf
|
|
is returned in the location pointed to by
|
|
.Fa vfc .
|
|
The fields in a
|
|
.Dq Li struct xvfsconf
|
|
are defined as follows:
|
|
.Pp
|
|
.Bl -tag -compact -width vfc_refcount
|
|
.It vfc_name
|
|
the name of the file system
|
|
.It vfc_typenum
|
|
the file system type number assigned by the kernel
|
|
.It vfc_refcount
|
|
the number of active mount points using the file system
|
|
.It vfc_flags
|
|
flag bits, as described below
|
|
.El
|
|
.Pp
|
|
The flags are defined as follows:
|
|
.Pp
|
|
.Bl -tag -width VFCF_DELEGADMIN -compact
|
|
.It Dv VFCF_STATIC
|
|
statically compiled into kernel
|
|
.It Dv VFCF_NETWORK
|
|
may get data over the network
|
|
.It Dv VFCF_READONLY
|
|
writes are not implemented
|
|
.It Dv VFCF_SYNTHETIC
|
|
data does not represent real files
|
|
.It Dv VFCF_LOOPBACK
|
|
aliases some other mounted FS
|
|
.It Dv VFCF_UNICODE
|
|
stores file names as Unicode
|
|
.It Dv VFCF_JAIL
|
|
can be mounted from within a jail if
|
|
.Va security.jail.mount_allowed
|
|
sysctl is set to
|
|
.Dv 1
|
|
.It Dv VFCF_DELEGADMIN
|
|
supports delegated administration if
|
|
.Va vfs.usermount
|
|
sysctl is set to
|
|
.Dv 1
|
|
.El
|
|
.Sh RETURN VALUES
|
|
.Rv -std getvfsbyname
|
|
.Sh ERRORS
|
|
The following errors may be reported:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EFAULT
|
|
The
|
|
.Fa vfc
|
|
argument
|
|
points to an invalid address.
|
|
.It Bq Er ENOENT
|
|
The
|
|
.Fa name
|
|
argument
|
|
specifies a file system that is unknown or not configured in the kernel.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr jail 2 ,
|
|
.Xr mount 2 ,
|
|
.Xr sysctl 3 ,
|
|
.Xr jail 8 ,
|
|
.Xr mount 8 ,
|
|
.Xr sysctl 8
|
|
.Sh HISTORY
|
|
A variant of the
|
|
.Fn getvfsbyname
|
|
function first appeared in
|
|
.Fx 2.0 .
|