g_part.h

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    1 /*-
    2  * Copyright (c) 2006-2008 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/10.0/sys/geom/part/g_part.h 247961 2013-03-07 22:32:41Z gavin $
   27  */
   28 
   29 #ifndef _GEOM_PART_H_
   30 #define _GEOM_PART_H_
   31 
   32 #define G_PART_TRACE(args)      g_trace args
   33 
   34 #define G_PART_PROBE_PRI_LOW    -10
   35 #define G_PART_PROBE_PRI_NORM   -5
   36 #define G_PART_PROBE_PRI_HIGH   0
   37 
   38 enum g_part_alias {
   39         G_PART_ALIAS_APPLE_BOOT,        /* An Apple boot partition entry. */
   40         G_PART_ALIAS_APPLE_HFS,         /* An HFS+ file system entry. */
   41         G_PART_ALIAS_APPLE_LABEL,       /* An Apple label partition entry. */
   42         G_PART_ALIAS_APPLE_RAID,        /* An Apple RAID partition entry. */
   43         G_PART_ALIAS_APPLE_RAID_OFFLINE,/* An Apple RAID (offline) part entry.*/
   44         G_PART_ALIAS_APPLE_TV_RECOVERY, /* An Apple TV recovery part entry. */
   45         G_PART_ALIAS_APPLE_UFS,         /* An Apple UFS partition entry. */
   46         G_PART_ALIAS_EFI,               /* A EFI system partition entry. */
   47         G_PART_ALIAS_FREEBSD,           /* A BSD labeled partition entry. */
   48         G_PART_ALIAS_FREEBSD_BOOT,      /* A FreeBSD boot partition entry. */
   49         G_PART_ALIAS_FREEBSD_NANDFS,    /* A FreeBSD nandfs partition entry. */
   50         G_PART_ALIAS_FREEBSD_SWAP,      /* A swap partition entry. */
   51         G_PART_ALIAS_FREEBSD_UFS,       /* A UFS/UFS2 file system entry. */
   52         G_PART_ALIAS_FREEBSD_VINUM,     /* A Vinum partition entry. */
   53         G_PART_ALIAS_FREEBSD_ZFS,       /* A ZFS file system entry. */
   54         G_PART_ALIAS_MBR,               /* A MBR (extended) partition entry. */
   55         G_PART_ALIAS_LINUX_DATA,        /* A Linux data partition entry. */
   56         G_PART_ALIAS_LINUX_LVM,         /* A Linux LVM partition entry. */
   57         G_PART_ALIAS_LINUX_RAID,        /* A Linux RAID partition entry. */
   58         G_PART_ALIAS_LINUX_SWAP,        /* A Linux swap partition entry. */
   59         G_PART_ALIAS_MS_BASIC_DATA,     /* A Microsoft Data part. entry. */
   60         G_PART_ALIAS_MS_LDM_DATA,       /* A Microsoft LDM Data part. entry. */
   61         G_PART_ALIAS_MS_LDM_METADATA,   /* A Microsoft LDM Metadata entry. */
   62         G_PART_ALIAS_MS_RESERVED,       /* A Microsoft Reserved part. entry. */
   63         G_PART_ALIAS_MS_NTFS,           /* A Microsoft NTFS partition entry */
   64         G_PART_ALIAS_NETBSD_CCD,        /* A NetBSD CCD partition entry. */
   65         G_PART_ALIAS_NETBSD_CGD,        /* A NetBSD CGD partition entry. */
   66         G_PART_ALIAS_NETBSD_FFS,        /* A NetBSD FFS partition entry. */
   67         G_PART_ALIAS_NETBSD_RAID,       /* A NetBSD RAID partition entry. */
   68         G_PART_ALIAS_NETBSD_SWAP,       /* A NetBSD swap partition entry. */
   69         G_PART_ALIAS_NETBSD_LFS,        /* A NetBSD LFS partition entry. */
   70         G_PART_ALIAS_EBR,               /* A EBR partition entry. */
   71         G_PART_ALIAS_MS_FAT16,          /* A Microsoft FAT16 partition entry. */
   72         G_PART_ALIAS_MS_FAT32,          /* A Microsoft FAT32 partition entry. */
   73         G_PART_ALIAS_BIOS_BOOT,         /* A GRUB 2 boot partition entry. */
   74         G_PART_ALIAS_VMFS,              /* A VMware VMFS partition entry */
   75         G_PART_ALIAS_VMKDIAG,           /* A VMware vmkDiagnostic partition entry */
   76         G_PART_ALIAS_VMRESERVED,        /* A VMware reserved partition entry */
   77         /* Keep the following last */
   78         G_PART_ALIAS_COUNT
   79 };
   80 
   81 const char *g_part_alias_name(enum g_part_alias);
   82 
   83 /* G_PART scheme (KOBJ class). */
   84 struct g_part_scheme {
   85         KOBJ_CLASS_FIELDS;
   86         size_t          gps_entrysz;
   87         int             gps_minent;
   88         int             gps_maxent;
   89         int             gps_bootcodesz;
   90         TAILQ_ENTRY(g_part_scheme) scheme_list;
   91 };
   92 
   93 struct g_part_entry {
   94         LIST_ENTRY(g_part_entry) gpe_entry;
   95         struct g_provider *gpe_pp;      /* Corresponding provider. */
   96         off_t           gpe_offset;     /* Byte offset. */
   97         quad_t          gpe_start;      /* First LBA of partition. */
   98         quad_t          gpe_end;        /* Last LBA of partition. */
   99         int             gpe_index;
  100         int             gpe_created:1;  /* Entry is newly created. */
  101         int             gpe_deleted:1;  /* Entry has been deleted. */
  102         int             gpe_modified:1; /* Entry has been modified. */
  103         int             gpe_internal:1; /* Entry is not a used entry. */
  104 };
  105 
  106 /* G_PART table (KOBJ instance). */
  107 struct g_part_table {
  108         KOBJ_FIELDS;
  109         struct g_part_scheme *gpt_scheme;
  110         struct g_geom   *gpt_gp;
  111         LIST_HEAD(, g_part_entry) gpt_entry;
  112         quad_t          gpt_first;      /* First allocatable LBA */
  113         quad_t          gpt_last;       /* Last allocatable LBA */
  114         int             gpt_entries;
  115         /*
  116          * gpt_smhead and gpt_smtail are bitmaps representing the first
  117          * 32 sectors on the disk (gpt_smhead) and the last 32 sectors
  118          * on the disk (gpt_smtail). These maps are used by the commit
  119          * verb to clear sectors previously used by a scheme after the
  120          * partitioning scheme has been destroyed.
  121          */
  122         uint32_t        gpt_smhead;
  123         uint32_t        gpt_smtail;
  124         /*
  125          * gpt_sectors and gpt_heads are the fixed or synchesized number
  126          * of sectors per track and heads (resp) that make up a disks
  127          * geometry. This is to support partitioning schemes as well as
  128          * file systems that work on a geometry. The MBR scheme and the
  129          * MS-DOS (FAT) file system come to mind.
  130          * We keep track of whether the geometry is fixed or synchesized
  131          * so that a partitioning scheme can correct the synthesized
  132          * geometry, based on the on-disk metadata.
  133          */
  134         uint32_t        gpt_sectors;
  135         uint32_t        gpt_heads;
  136 
  137         int             gpt_depth;      /* Sub-partitioning level. */
  138         int             gpt_isleaf:1;   /* Cannot be sub-partitioned. */
  139         int             gpt_created:1;  /* Newly created. */
  140         int             gpt_modified:1; /* Table changes have been made. */
  141         int             gpt_opened:1;   /* Permissions obtained. */
  142         int             gpt_fixgeom:1;  /* Geometry is fixed. */
  143         int             gpt_corrupt:1;  /* Table is corrupt. */
  144 };
  145 
  146 struct g_part_entry *g_part_new_entry(struct g_part_table *, int, quad_t,
  147     quad_t);
  148 
  149 enum g_part_ctl {
  150         G_PART_CTL_NONE,
  151         G_PART_CTL_ADD,
  152         G_PART_CTL_BOOTCODE,
  153         G_PART_CTL_COMMIT,
  154         G_PART_CTL_CREATE,
  155         G_PART_CTL_DELETE,
  156         G_PART_CTL_DESTROY,
  157         G_PART_CTL_MODIFY,
  158         G_PART_CTL_MOVE,
  159         G_PART_CTL_RECOVER,
  160         G_PART_CTL_RESIZE,
  161         G_PART_CTL_SET,
  162         G_PART_CTL_UNDO,
  163         G_PART_CTL_UNSET
  164 };
  165 
  166 /* G_PART ctlreq parameters. */
  167 #define G_PART_PARM_ENTRIES     0x0001
  168 #define G_PART_PARM_FLAGS       0x0002
  169 #define G_PART_PARM_GEOM        0x0004
  170 #define G_PART_PARM_INDEX       0x0008
  171 #define G_PART_PARM_LABEL       0x0010
  172 #define G_PART_PARM_OUTPUT      0x0020
  173 #define G_PART_PARM_PROVIDER    0x0040
  174 #define G_PART_PARM_SCHEME      0x0080
  175 #define G_PART_PARM_SIZE        0x0100
  176 #define G_PART_PARM_START       0x0200
  177 #define G_PART_PARM_TYPE        0x0400
  178 #define G_PART_PARM_VERSION     0x0800
  179 #define G_PART_PARM_BOOTCODE    0x1000
  180 #define G_PART_PARM_ATTRIB      0x2000
  181 #define G_PART_PARM_FORCE       0x4000
  182 
  183 struct g_part_parms {
  184         unsigned int    gpp_parms;
  185         unsigned int    gpp_entries;
  186         const char      *gpp_flags;
  187         struct g_geom   *gpp_geom;
  188         unsigned int    gpp_index;
  189         const char      *gpp_label;
  190         struct g_provider *gpp_provider;
  191         struct g_part_scheme *gpp_scheme;
  192         quad_t          gpp_size;
  193         quad_t          gpp_start;
  194         const char      *gpp_type;
  195         unsigned int    gpp_version;
  196         const void      *gpp_codeptr;
  197         unsigned int    gpp_codesize;
  198         const char      *gpp_attrib;
  199         unsigned int    gpp_force;
  200 };
  201 
  202 void g_part_geometry_heads(off_t, u_int, off_t *, u_int *);
  203 
  204 int g_part_modevent(module_t, int, struct g_part_scheme *);
  205 
  206 #define G_PART_SCHEME_DECLARE(name)                             \
  207     static int name##_modevent(module_t mod, int tp, void *d)   \
  208     {                                                           \
  209         return (g_part_modevent(mod, tp, d));                   \
  210     }                                                           \
  211     static moduledata_t name##_mod = {                          \
  212         #name,                                                  \
  213         name##_modevent,                                        \
  214         &name##_scheme                                          \
  215     };                                                          \
  216     DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_ANY); \
  217     MODULE_DEPEND(name, g_part, 0, 0, 0)
  218 
  219 #endif /* !_GEOM_PART_H_ */
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FreeBSD/Linux Kernel Cross Reference sys/geom/part/g_part.h

FreeBSD/Linux Kernel Cross Reference
sys/geom/part/g_part.h
