1997-03-11 11:29:42 +00:00
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.\" Copyright (c) 1995
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)kvm_getvfsbyname.3 8.3 (Berkeley) 5/4/95
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1999-08-28 00:22:10 +00:00
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.\" $FreeBSD$
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1997-03-11 11:29:42 +00:00
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.\"
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.Dd May 4, 1995
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.Dt GETVFSBYNAME 3
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.Os
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.Sh NAME
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.Nm getvfsbyname
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.Nd get information about a filesystem
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2000-04-21 09:42:15 +00:00
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.Sh LIBRARY
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.Lb libc
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1997-03-11 11:29:42 +00:00
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.Sh SYNOPSIS
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2001-10-01 16:09:29 +00:00
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.In sys/param.h
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.In sys/mount.h
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1997-03-11 11:29:42 +00:00
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.Ft int
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- Introduce a new struct xvfsconf, the userland version of struct vfsconf.
- Make getvfsbyname() take a struct xvfsconf *.
- Convert several consumers of getvfsbyname() to use struct xvfsconf.
- Correct the getvfsbyname.3 manpage.
- Create a new vfs.conflist sysctl to dump all the struct xvfsconf in the
kernel, and rewrite getvfsbyname() to use this instead of the weird
existing API.
- Convert some {set,get,end}vfsent() consumers to use the new vfs.conflist
sysctl.
- Convert a vfsload() call in nfsiod.c to kldload() and remove the useless
vfsisloadable() and endvfsent() calls.
- Add a warning printf() in vfs_sysctl() to tell people they are using
an old userland.
After these changes, it's possible to modify struct vfsconf without
breaking the binary compatibility. Please note that these changes don't
break this compatibility either.
When bp will have updated mount_smbfs(8) with the patch I sent him, there
will be no more consumers of the {set,get,end}vfsent(), vfsisloadable()
and vfsload() API, and I will promptly delete it.
2002-08-10 20:19:04 +00:00
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.Fn getvfsbyname "const char *name" "struct xvfsconf *vfc"
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1997-03-11 11:29:42 +00:00
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.Sh DESCRIPTION
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The
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.Fn getvfsbyname
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function provides access to information about a
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filesystem module that is configured in the kernel.
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If successful,
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the requested filesystem
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- Introduce a new struct xvfsconf, the userland version of struct vfsconf.
- Make getvfsbyname() take a struct xvfsconf *.
- Convert several consumers of getvfsbyname() to use struct xvfsconf.
- Correct the getvfsbyname.3 manpage.
- Create a new vfs.conflist sysctl to dump all the struct xvfsconf in the
kernel, and rewrite getvfsbyname() to use this instead of the weird
existing API.
- Convert some {set,get,end}vfsent() consumers to use the new vfs.conflist
sysctl.
- Convert a vfsload() call in nfsiod.c to kldload() and remove the useless
vfsisloadable() and endvfsent() calls.
- Add a warning printf() in vfs_sysctl() to tell people they are using
an old userland.
After these changes, it's possible to modify struct vfsconf without
breaking the binary compatibility. Please note that these changes don't
break this compatibility either.
When bp will have updated mount_smbfs(8) with the patch I sent him, there
will be no more consumers of the {set,get,end}vfsent(), vfsisloadable()
and vfsload() API, and I will promptly delete it.
2002-08-10 20:19:04 +00:00
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.Fa xvfsconf
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1997-03-11 11:29:42 +00:00
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is returned in the location pointed to by
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1997-03-12 15:21:57 +00:00
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.Fa vfc .
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1997-03-11 11:29:42 +00:00
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The fields in a
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- Introduce a new struct xvfsconf, the userland version of struct vfsconf.
- Make getvfsbyname() take a struct xvfsconf *.
- Convert several consumers of getvfsbyname() to use struct xvfsconf.
- Correct the getvfsbyname.3 manpage.
- Create a new vfs.conflist sysctl to dump all the struct xvfsconf in the
kernel, and rewrite getvfsbyname() to use this instead of the weird
existing API.
- Convert some {set,get,end}vfsent() consumers to use the new vfs.conflist
sysctl.
- Convert a vfsload() call in nfsiod.c to kldload() and remove the useless
vfsisloadable() and endvfsent() calls.
- Add a warning printf() in vfs_sysctl() to tell people they are using
an old userland.
After these changes, it's possible to modify struct vfsconf without
breaking the binary compatibility. Please note that these changes don't
break this compatibility either.
When bp will have updated mount_smbfs(8) with the patch I sent him, there
will be no more consumers of the {set,get,end}vfsent(), vfsisloadable()
and vfsload() API, and I will promptly delete it.
2002-08-10 20:19:04 +00:00
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.Dq Li struct xvfsconf
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1997-03-11 11:29:42 +00:00
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are defined as follows:
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.Pp
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.Bl -tag -compact -width vfc_refcount
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.It vfc_name
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the name of the filesystem
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.It vfc_typenum
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the filesystem type number assigned by the kernel
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.It vfc_refcount
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the number of active mount points using the filesystem
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.It vfc_flags
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- Introduce a new struct xvfsconf, the userland version of struct vfsconf.
- Make getvfsbyname() take a struct xvfsconf *.
- Convert several consumers of getvfsbyname() to use struct xvfsconf.
- Correct the getvfsbyname.3 manpage.
- Create a new vfs.conflist sysctl to dump all the struct xvfsconf in the
kernel, and rewrite getvfsbyname() to use this instead of the weird
existing API.
- Convert some {set,get,end}vfsent() consumers to use the new vfs.conflist
sysctl.
- Convert a vfsload() call in nfsiod.c to kldload() and remove the useless
vfsisloadable() and endvfsent() calls.
- Add a warning printf() in vfs_sysctl() to tell people they are using
an old userland.
After these changes, it's possible to modify struct vfsconf without
breaking the binary compatibility. Please note that these changes don't
break this compatibility either.
When bp will have updated mount_smbfs(8) with the patch I sent him, there
will be no more consumers of the {set,get,end}vfsent(), vfsisloadable()
and vfsload() API, and I will promptly delete it.
2002-08-10 20:19:04 +00:00
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flag bits, as described below
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.El
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.Pp
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The flags are defined as follows:
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.Pp
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.Bl -tag -width VFCF_SYNTHETIC -compact
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.It Dv VFCF_STATIC
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statically compiled into kernel
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.It Dv VFCF_NETWORK
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may get data over the network
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.It Dv VFCF_READONLY
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writes are not implemented
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.It Dv VFCF_SYNTHETIC
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data does not represent real files
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.It Dv VFCF_LOOPBACK
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aliases some other mounted FS
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.It Dv VFCF_UNICODE
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stores file names as Unicode
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1997-03-11 11:29:42 +00:00
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.El
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.Sh RETURN VALUES
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2000-11-20 14:11:46 +00:00
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.Rv -std getvfsbyname
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1997-03-11 11:29:42 +00:00
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.Sh ERRORS
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The following errors may be reported:
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.Bl -tag -width Er
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.It Bq Er EFAULT
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The
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.Fa vfc
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pointer contains an invalid address.
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.It Bq Er ENOENT
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The
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.Fa name
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specifies a filesystem that is unknown or not configured in the kernel.
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2000-12-29 14:08:20 +00:00
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.El
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1997-03-11 11:29:42 +00:00
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.Sh SEE ALSO
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.Xr mount 2 ,
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.Xr sysctl 3 ,
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1999-08-14 07:46:50 +00:00
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.Xr mount 8 ,
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.Xr sysctl 8
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1997-03-11 11:29:42 +00:00
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.Sh HISTORY
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A variant of the
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.Fn getvfsbyname
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1997-03-12 15:21:57 +00:00
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function first appeared in
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.Fx 2.0 .
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