5443a03210
The logical disks will appear as /dev/lvm/<vol group>-<logical vol>, for instance /dev/lvm/vg0-home. G_LINUX_LVM currently supports linear stripes with segments on multiple physical disks. The metadata is read only, logical volumes can not be allocated or resized. Reviewed by: Ivan Voras Previously known as geom_lvm(4), rename requested by des, phk.
114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/*-
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* Copyright (c) 2008 Andrew Thompson <thompsa@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 AUTHORS 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 AUTHORS 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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* $FreeBSD$
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*/
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#define G_LLVM_DEBUG(lvl, ...) do { \
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if (g_llvm_debug >= (lvl)) { \
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printf("GEOM_LINUX_LVM"); \
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if (g_llvm_debug > 0) \
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printf("[%u]", lvl); \
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printf(": "); \
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printf(__VA_ARGS__); \
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printf("\n"); \
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} \
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} while (0)
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#define G_LLVM_CLASS_NAME "LINUX_LVM"
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#define G_LLVM_NAMELEN 128
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#define G_LLVM_UUIDLEN 40
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#define G_LLVM_MAGIC "\040\114\126\115\062\040\170\133" \
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"\065\101\045\162\060\116\052\076"
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struct g_llvm_label {
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uint64_t ll_sector;
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uint32_t ll_crc;
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uint32_t ll_offset;
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char ll_uuid[G_LLVM_UUIDLEN];
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uint64_t ll_size;
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uint64_t ll_pestart;
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uint64_t ll_md_offset;
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uint64_t ll_md_size;
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};
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struct g_llvm_metadata {
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uint32_t md_csum;
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uint32_t md_version;
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uint64_t md_start;
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uint64_t md_size;
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uint64_t md_reloffset;
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uint64_t md_relsize;
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struct g_llvm_vg *md_vg;
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};
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struct g_llvm_lv {
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LIST_ENTRY(g_llvm_lv) lv_next;
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struct g_llvm_vg *lv_vg;
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char lv_name[G_LLVM_NAMELEN];
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char lv_uuid[G_LLVM_UUIDLEN];
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int lv_sgcount;
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int lv_sgactive;
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struct g_provider *lv_gprov;
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int lv_extentcount;
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LIST_HEAD(, g_llvm_segment) lv_segs;
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int lv_numsegs;
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struct g_llvm_segment *lv_firstsg;
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};
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struct g_llvm_pv {
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LIST_ENTRY(g_llvm_pv) pv_next;
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struct g_llvm_vg *pv_vg;
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char pv_name[G_LLVM_NAMELEN];
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char pv_uuid[G_LLVM_UUIDLEN];
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size_t pv_size;
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off_t pv_start;
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int pv_count;
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struct g_provider *pv_gprov;
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struct g_consumer *pv_gcons;
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};
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struct g_llvm_segment {
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LIST_ENTRY(g_llvm_segment) sg_next;
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int sg_start;
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int sg_end;
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int sg_count;
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char sg_pvname[G_LLVM_NAMELEN];
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struct g_llvm_pv *sg_pv;
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int sg_pvstart;
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off_t sg_pvoffset;
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};
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struct g_llvm_vg {
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LIST_ENTRY(g_llvm_vg) vg_next;
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char vg_name[G_LLVM_NAMELEN];
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char vg_uuid[G_LLVM_UUIDLEN];
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size_t vg_extentsize;
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int vg_sectorsize;
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struct g_geom *vg_geom;
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LIST_HEAD(, g_llvm_pv) vg_pvs;
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LIST_HEAD(, g_llvm_lv) vg_lvs;
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};
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