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freebsd-skq/ebr.c

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Use linker sets to provide build-time selection of the schemes that need to be supported. Each scheme provides data and callbacks for handling the scheme-specifics. To this end, put each scheme in its own source file.
2014-03-20 00:38:17 +00:00
/*-
* Copyright (c) 2014 Juniper Networks, Inc.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
Add a scheme-specific write callback to write the metadata. While here: 1. Move FreeBSD-specific headers to a more centralized place, so that it's easier to port mkimg. 2. Remove inclusion of <uuid.h> where we don't need it (copy-pasted). 3. Check the partition data given on the command line before we do any I/O. 4. Add scheme_round() for rounding the partition size. 5. Have scheme_write call the scheme-specific write callback and have it propagate errors back to the caller.
2014-03-20 20:14:26 +00:00
#include <sys/diskmbr.h>
#include <sys/errno.h>
Use linker sets to provide build-time selection of the schemes that need to be supported. Each scheme provides data and callbacks for handling the scheme-specifics. To this end, put each scheme in its own source file.
2014-03-20 00:38:17 +00:00
#include <stdlib.h>
#include "mkimg.h"
#include "scheme.h"
static struct mkimg_alias ebr_aliases[] = {
Add more partition types (mostly just the FreeBSD ones) to GPT. Avoid having schemes use literal strings by introducing an enum as the intermediate representation (see geom_part).
2014-03-21 16:11:49 +00:00
{ ALIAS_NONE, 0 }
Use linker sets to provide build-time selection of the schemes that need to be supported. Each scheme provides data and callbacks for handling the scheme-specifics. To this end, put each scheme in its own source file.
2014-03-20 00:38:17 +00:00
};
Replace *_get_leader() and *_get_trailer() with a single *_metadata(). This single function takes a where argument to indicate the kind of metadata to "size". This way we can also get rid of the "padding" field in the scheme structure. This should make it a little more understandable what's going on.
2014-03-20 19:37:30 +00:00
static u_int
ebr_metadata(u_int where, u_int parts __unused, u_int secsz __unused)
Use linker sets to provide build-time selection of the schemes that need to be supported. Each scheme provides data and callbacks for handling the scheme-specifics. To this end, put each scheme in its own source file.
2014-03-20 00:38:17 +00:00
{
Replace *_get_leader() and *_get_trailer() with a single *_metadata(). This single function takes a where argument to indicate the kind of metadata to "size". This way we can also get rid of the "padding" field in the scheme structure. This should make it a little more understandable what's going on.
2014-03-20 19:37:30 +00:00
u_int secs;
Use linker sets to provide build-time selection of the schemes that need to be supported. Each scheme provides data and callbacks for handling the scheme-specifics. To this end, put each scheme in its own source file.
2014-03-20 00:38:17 +00:00
Replace *_get_leader() and *_get_trailer() with a single *_metadata(). This single function takes a where argument to indicate the kind of metadata to "size". This way we can also get rid of the "padding" field in the scheme structure. This should make it a little more understandable what's going on.
2014-03-20 19:37:30 +00:00
secs = (where == SCHEME_META_PART_BEFORE) ? 1 : 0;
return (secs);
Use linker sets to provide build-time selection of the schemes that need to be supported. Each scheme provides data and callbacks for handling the scheme-specifics. To this end, put each scheme in its own source file.
2014-03-20 00:38:17 +00:00
}
Add a scheme-specific write callback to write the metadata. While here: 1. Move FreeBSD-specific headers to a more centralized place, so that it's easier to port mkimg. 2. Remove inclusion of <uuid.h> where we don't need it (copy-pasted). 3. Check the partition data given on the command line before we do any I/O. 4. Add scheme_round() for rounding the partition size. 5. Have scheme_write call the scheme-specific write callback and have it propagate errors back to the caller.
2014-03-20 20:14:26 +00:00
static int
ebr_write(int fd __unused, off_t imgsz __unused, u_int parts __unused,
Handle the -b option for specifying boot code that lives in the partitioning scheme's meta data. Implement it for GPT.
2014-03-21 19:40:05 +00:00
u_int secsz __unused, void *bootcode __unused)
Add a scheme-specific write callback to write the metadata. While here: 1. Move FreeBSD-specific headers to a more centralized place, so that it's easier to port mkimg. 2. Remove inclusion of <uuid.h> where we don't need it (copy-pasted). 3. Check the partition data given on the command line before we do any I/O. 4. Add scheme_round() for rounding the partition size. 5. Have scheme_write call the scheme-specific write callback and have it propagate errors back to the caller.
2014-03-20 20:14:26 +00:00
{
return (ENOSYS);
}
Use linker sets to provide build-time selection of the schemes that need to be supported. Each scheme provides data and callbacks for handling the scheme-specifics. To this end, put each scheme in its own source file.
2014-03-20 00:38:17 +00:00
static struct mkimg_scheme ebr_scheme = {
.name = "ebr",
.description = "Extended Boot Record",
.aliases = ebr_aliases,
Replace *_get_leader() and *_get_trailer() with a single *_metadata(). This single function takes a where argument to indicate the kind of metadata to "size". This way we can also get rid of the "padding" field in the scheme structure. This should make it a little more understandable what's going on.
2014-03-20 19:37:30 +00:00
.metadata = ebr_metadata,
Add a scheme-specific write callback to write the metadata. While here: 1. Move FreeBSD-specific headers to a more centralized place, so that it's easier to port mkimg. 2. Remove inclusion of <uuid.h> where we don't need it (copy-pasted). 3. Check the partition data given on the command line before we do any I/O. 4. Add scheme_round() for rounding the partition size. 5. Have scheme_write call the scheme-specific write callback and have it propagate errors back to the caller.
2014-03-20 20:14:26 +00:00
.write = ebr_write,
Replace *_get_leader() and *_get_trailer() with a single *_metadata(). This single function takes a where argument to indicate the kind of metadata to "size". This way we can also get rid of the "padding" field in the scheme structure. This should make it a little more understandable what's going on.
2014-03-20 19:37:30 +00:00
.nparts = 4096
Use linker sets to provide build-time selection of the schemes that need to be supported. Each scheme provides data and callbacks for handling the scheme-specifics. To this end, put each scheme in its own source file.
2014-03-20 00:38:17 +00:00
};
SCHEME_DEFINE(ebr_scheme);
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