d575e81fbc
Implement the "gconcat append" command which can be used to append a disk to the end of an existing gconcat device without unmounting. If the gconcat device is using the "automatic" method, i.e., stores metadata on the devices, new metadata is written to all existing components, as well as to the newly added one. Pull Request: https://github.com/freebsd/freebsd-src/pull/472 Reviewed by: imp@
120 lines
4.0 KiB
C
120 lines
4.0 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
|
|
* 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 AUTHORS 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 AUTHORS 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _G_CONCAT_H_
|
|
#define _G_CONCAT_H_
|
|
|
|
#include <sys/endian.h>
|
|
|
|
#define G_CONCAT_CLASS_NAME "CONCAT"
|
|
|
|
#define G_CONCAT_MAGIC "GEOM::CONCAT"
|
|
/*
|
|
* Version history:
|
|
* 1 - Initial version number.
|
|
* 2 - Added 'stop' command to gconcat(8).
|
|
* 3 - Added md_provider field to metadata and '-h' option to gconcat(8).
|
|
* 4 - Added md_provsize field to metadata.
|
|
*/
|
|
#define G_CONCAT_VERSION 4
|
|
|
|
#ifdef _KERNEL
|
|
#define G_CONCAT_TYPE_MANUAL 0
|
|
#define G_CONCAT_TYPE_AUTOMATIC 1
|
|
|
|
#define G_CONCAT_DEBUG(lvl, ...) \
|
|
_GEOM_DEBUG("GEOM_CONCAT", g_concat_debug, (lvl), NULL, __VA_ARGS__)
|
|
#define G_CONCAT_LOGREQ(bp, ...) \
|
|
_GEOM_DEBUG("GEOM_CONCAT", g_concat_debug, 2, (bp), __VA_ARGS__)
|
|
|
|
struct g_concat_disk {
|
|
TAILQ_ENTRY(g_concat_disk) d_next;
|
|
struct g_consumer *d_consumer;
|
|
struct g_concat_softc *d_softc;
|
|
off_t d_start;
|
|
off_t d_end;
|
|
int d_candelete;
|
|
int d_removed;
|
|
bool d_hardcoded;
|
|
};
|
|
|
|
struct g_concat_softc {
|
|
u_int sc_type; /* provider type */
|
|
struct g_geom *sc_geom;
|
|
struct g_provider *sc_provider;
|
|
uint32_t sc_id; /* concat unique ID */
|
|
|
|
uint16_t sc_ndisks;
|
|
TAILQ_HEAD(g_concat_disks, g_concat_disk) sc_disks;
|
|
|
|
struct mtx sc_completion_lock; /* synchronizes cross-boundary IOs */
|
|
struct sx sc_disks_lock; /* synchronizes modification of sc_disks */
|
|
};
|
|
#define sc_name sc_geom->name
|
|
#endif /* _KERNEL */
|
|
|
|
struct g_concat_metadata {
|
|
char md_magic[16]; /* Magic value. */
|
|
uint32_t md_version; /* Version number. */
|
|
char md_name[16]; /* Concat name. */
|
|
uint32_t md_id; /* Unique ID. */
|
|
uint16_t md_no; /* Disk number. */
|
|
uint16_t md_all; /* Number of all disks. */
|
|
char md_provider[16]; /* Hardcoded provider. */
|
|
uint64_t md_provsize; /* Provider's size. */
|
|
};
|
|
static __inline void
|
|
concat_metadata_encode(const struct g_concat_metadata *md, u_char *data)
|
|
{
|
|
|
|
bcopy(md->md_magic, data, sizeof(md->md_magic));
|
|
le32enc(data + 16, md->md_version);
|
|
bcopy(md->md_name, data + 20, sizeof(md->md_name));
|
|
le32enc(data + 36, md->md_id);
|
|
le16enc(data + 40, md->md_no);
|
|
le16enc(data + 42, md->md_all);
|
|
bcopy(md->md_provider, data + 44, sizeof(md->md_provider));
|
|
le64enc(data + 60, md->md_provsize);
|
|
}
|
|
static __inline void
|
|
concat_metadata_decode(const u_char *data, struct g_concat_metadata *md)
|
|
{
|
|
|
|
bcopy(data, md->md_magic, sizeof(md->md_magic));
|
|
md->md_version = le32dec(data + 16);
|
|
bcopy(data + 20, md->md_name, sizeof(md->md_name));
|
|
md->md_id = le32dec(data + 36);
|
|
md->md_no = le16dec(data + 40);
|
|
md->md_all = le16dec(data + 42);
|
|
bcopy(data + 44, md->md_provider, sizeof(md->md_provider));
|
|
md->md_provsize = le64dec(data + 60);
|
|
}
|
|
#endif /* _G_CONCAT_H_ */
|