Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
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.\"
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.\" Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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.\" 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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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2020-10-18 16:24:08 +00:00
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.Dd October 10, 2020
|
2004-07-06 08:21:12 +00:00
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|
.Dt G_ATTACH 9
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.Os
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|
|
.Sh NAME
|
|
|
|
.Nm g_attach ,
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|
|
.Nm g_detach
|
2004-05-18 11:33:37 +00:00
|
|
|
.Nd "attach/detach GEOM consumers to/from providers"
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.Sh SYNOPSIS
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|
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|
.In geom/geom.h
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.Ft int
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|
|
.Fn g_attach "struct g_consumer *cp" "struct g_provider *pp"
|
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|
|
.Ft void
|
|
|
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.Fn g_detach "struct g_consumer *cp"
|
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|
|
.Sh DESCRIPTION
|
|
|
|
The
|
|
|
|
.Fn g_attach
|
2004-05-18 11:33:37 +00:00
|
|
|
function attaches given consumer
|
|
|
|
.Fa cp
|
|
|
|
to given provider
|
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|
|
.Fa pp ,
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|
|
|
thus establishing a communication channel between the consumer and the
|
2004-05-18 12:37:47 +00:00
|
|
|
provider that allows to change access counts and perform I/O operations.
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.Pp
|
|
|
|
The
|
|
|
|
.Fn g_detach
|
2004-05-18 11:33:37 +00:00
|
|
|
function detaches given consumer
|
|
|
|
.Fa cp
|
|
|
|
from its corresponding provider, tearing down the communication channel
|
|
|
|
between them.
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.Sh RESTRICTIONS/CONDITIONS
|
|
|
|
.Fn g_attach :
|
|
|
|
.Bl -item -offset indent
|
|
|
|
.It
|
2004-05-18 11:33:37 +00:00
|
|
|
The consumer must not be attached to a provider.
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.It
|
2004-05-18 11:33:37 +00:00
|
|
|
The operation must not create a topology loop.
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.It
|
|
|
|
The topology lock has to be held.
|
|
|
|
.El
|
|
|
|
.Pp
|
|
|
|
.Fn g_detach :
|
|
|
|
.Bl -item -offset indent
|
|
|
|
.It
|
|
|
|
The consumer has to be attached.
|
|
|
|
.It
|
|
|
|
The access count has to be 0.
|
|
|
|
.It
|
|
|
|
There must be no active requests.
|
|
|
|
.It
|
|
|
|
The topology lock has to be held.
|
|
|
|
.El
|
|
|
|
.Sh RETURN VALUES
|
2004-05-18 11:33:37 +00:00
|
|
|
The
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.Fn g_attach
|
2004-05-18 11:33:37 +00:00
|
|
|
function returns 0 if successful; otherwise an error code is returned.
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.Sh EXAMPLES
|
2004-05-18 11:33:37 +00:00
|
|
|
Create a consumer, attach it to a given provider, gain read access and clean up.
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.Bd -literal -offset indent
|
|
|
|
void
|
|
|
|
some_function(struct g_geom *mygeom, struct g_provider *pp)
|
|
|
|
{
|
|
|
|
struct g_consumer *cp;
|
|
|
|
|
|
|
|
g_topology_assert();
|
|
|
|
|
|
|
|
/* Create new consumer on 'mygeom' geom. */
|
|
|
|
cp = g_new_consumer(mygeom);
|
|
|
|
/* Attach newly created consumer to given provider. */
|
|
|
|
if (g_attach(cp, pp) != 0) {
|
|
|
|
g_destroy_consumer(cp);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/* Open provider for reading through our consumer. */
|
2004-02-13 08:42:10 +00:00
|
|
|
if (g_access(cp, 1, 0, 0) != 0) {
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
g_detach(cp);
|
|
|
|
g_destroy_consumer(cp);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
g_topology_unlock();
|
|
|
|
/*
|
|
|
|
* Read data from provider.
|
|
|
|
*/
|
|
|
|
g_topology_lock();
|
|
|
|
|
|
|
|
/* Disconnect from provider (release access count). */
|
2004-02-13 08:42:10 +00:00
|
|
|
g_access(cp, -1, 0, 0);
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
/* Detach from provider. */
|
|
|
|
g_detach(cp);
|
|
|
|
/* Destroy consumer. */
|
|
|
|
g_destroy_consumer(cp);
|
|
|
|
}
|
|
|
|
.Ed
|
2005-01-21 08:36:40 +00:00
|
|
|
.Sh ERRORS
|
|
|
|
Possible errors:
|
|
|
|
.Bl -tag -width Er
|
|
|
|
.It Bq Er ELOOP
|
|
|
|
The operation creates a topology loop.
|
2020-10-18 16:24:08 +00:00
|
|
|
.It Bq Er ENXIO
|
|
|
|
Provider got orphaned.
|
2005-01-21 08:36:40 +00:00
|
|
|
.El
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.Sh SEE ALSO
|
|
|
|
.Xr geom 4 ,
|
2004-07-04 20:55:50 +00:00
|
|
|
.Xr DECLARE_GEOM_CLASS 9 ,
|
2004-03-11 19:53:22 +00:00
|
|
|
.Xr g_access 9 ,
|
Added first part of GEOM kernel API manuals pages.
Documented function and macros are:
- DECLARE_GEOM_CLASS(),
- g_attach(),
- g_detach(),
- g_new_bio(),
- g_clone_bio(),
- g_destroy_bio(),
- g_new_consumer(),
- g_destroy_consumer(),
- g_read_data(),
- g_write_data(),
- g_post_event(),
- g_waitfor_event(),
- g_cancel_event(),
- g_new_geomf(),
- g_destroy_geom(),
- g_new_providerf(),
- g_destroy_provider(),
- g_error_provider(),
- g_provider_by_name(),
- g_wither_geom().
and more to come.
I want to thanks following people for help with those documents:
Slawek Zak <zaks@prioris.mini.pw.edu.pl>
Simon L. Nielsen <simon@FreeBSD.org>
Pieter de Boer <g.p.de.boer@st.hanze.nl>
and of course
Poul-Henning Kamp <phk@FreeBSD.org>
Reviewed by: phk, scottl
Approved by: phk, scottl (mentor)
2004-02-11 10:06:18 +00:00
|
|
|
.Xr g_bio 9 ,
|
|
|
|
.Xr g_consumer 9 ,
|
|
|
|
.Xr g_data 9 ,
|
|
|
|
.Xr g_event 9 ,
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.Xr g_geom 9 ,
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.Xr g_provider 9 ,
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.Xr g_provider_by_name 9 ,
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.Xr g_wither_geom 9
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.Sh AUTHORS
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.An -nosplit
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This manual page was written by
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2014-06-26 21:44:30 +00:00
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.An Pawel Jakub Dawidek Aq Mt pjd@FreeBSD.org .
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