FreeBSD-5.3/sys/dev/vinum/vinumvar.h
/*-
* Copyright (c) 1997, 1998, 1999
* Nan Yang Computer Services Limited. All rights reserved.
*
* Parts copyright (c) 1997, 1998 Cybernet Corporation, NetMAX project.
*
* Written by Greg Lehey
*
* This software is distributed under the so-called ``Berkeley
* License'':
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Nan Yang Computer
* Services Limited.
* 4. Neither the name of the Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided ``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 company 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.
*
* $Id: vinumvar.h,v 1.33 2003/05/23 01:09:23 grog Exp grog $
* $FreeBSD: src/sys/dev/vinum/vinumvar.h,v 1.49 2004/03/19 10:28:34 le Exp $
*/
#include <sys/time.h>
#include <dev/vinum/vinumstate.h>
#include <sys/mutex.h>
/* Directory for device nodes. */
#define VINUM_DIR "/dev/vinum"
/*
* Some configuration maxima. They're an enum because
* we can't define global constants. Sorry about that.
*
* These aren't as bad as they look: most of them are soft limits.
*/
#define VINUMROOT
enum constants {
/*
* Current version of the data structures. This
* is used to ensure synchronization between
* kernel module and userland vinum(8).
*/
VINUMVERSION = 1,
VINUM_HEADER = 512, /* size of header on disk */
MAXCONFIGLINE = 1024, /* maximum size of a single config line */
MINVINUMSLICE = 1048576, /* minimum size of a slice */
ROUND_ROBIN_READPOL = -1, /* round robin read policy */
/*
* Type field in high-order two bits of minor
* number. Subdisks are in fact both type 2 and
* type 3, giving twice the number of subdisks.
* This causes some ugliness in the code.
*/
VINUM_VOLUME_TYPE = 0,
VINUM_PLEX_TYPE = 1,
VINUM_SD_TYPE = 2,
VINUM_SD2_TYPE = 3,
/*
* Define a minor device number.
* This is not used directly; instead, it's
* called by the other macros.
*/
#define VINUMMINOR(o,t) ((o & 0xff) | ((o & 0x3fff00) << 8) | (t << VINUM_TYPE_SHIFT))
VINUM_TYPE_SHIFT = 30,
VINUM_MAXVOL = 0x3ffffd, /* highest numbered volume */
/*
* The super device and the daemon device are
* magic: they're the two highest-numbered
* volumes.
*/
VINUM_SUPERDEV_VOL = 0x3ffffe,
VINUM_DAEMON_VOL = 0x3fffff,
VINUM_MAXPLEX = 0x3fffff,
VINUM_MAXSD = 0x7fffff,
#define VINUM_SUPERDEV_MINOR VINUMMINOR (VINUM_SUPERDEV_VOL, VINUM_VOLUME_TYPE)
#define VINUM_DAEMON_MINOR VINUMMINOR (VINUM_DAEMON_VOL, VINUM_VOLUME_TYPE)
/*
* Mask for the number part of each object.
* Plexes and volumes are the same, subdisks use
* the low-order bit of the type field and thus
* have twice the number.
*/
MAJORDEV_SHIFT = 8,
MAXPLEX = 8, /* maximum number of plexes in a volume */
MAXSD = 256, /* maximum number of subdisks in a plex */
MAXDRIVENAME = 32, /* maximum length of a device name */
MAXSDNAME = 64, /* maximum length of a subdisk name */
MAXPLEXNAME = 64, /* maximum length of a plex name */
MAXVOLNAME = 64, /* maximum length of a volume name */
MAXNAME = 64, /* maximum length of any name */
#define OBJTYPE(x) ((minor(x) >> VINUM_TYPE_SHIFT) & 3)
/* extract device type */
#define DEVTYPE(x) ((minor (x) >> VINUM_TYPE_SHIFT) & 3)
#define VINUM_SUPERDEV_NAME VINUM_DIR"/control" /* normal super device */
#define VINUM_DAEMON_DEV_NAME VINUM_DIR"/controld" /* super device for daemon only */
/*
* the number of object entries to cater for initially, and also the
* value by which they are incremented. It doesn't take long
* to extend them, so theoretically we could start with 1 of each, but
* it's untidy to allocate such small areas. These values are
* probably too small.
*/
INITIAL_DRIVES = 4,
INITIAL_VOLUMES = 4,
INITIAL_PLEXES = 8,
INITIAL_SUBDISKS = 16,
INITIAL_SUBDISKS_IN_PLEX = 4, /* number of subdisks to allocate to a plex */
INITIAL_SUBDISKS_IN_DRIVE = 4, /* number of subdisks to allocate to a drive */
INITIAL_DRIVE_FREELIST = 16, /* number of entries in drive freelist */
PLEX_REGION_TABLE_SIZE = 8, /* number of entries in plex region tables */
PLEX_LOCKS = 256, /* number of locks to allocate to a plex */
PLEXMUTEXES = 32,
MAX_REVIVE_BLOCKSIZE = MAXPHYS, /* maximum revive block size */
DEFAULT_REVIVE_BLOCKSIZE = 65536, /* default revive block size */
VINUMHOSTNAMELEN = 32, /* host name field in label */
};
/*
* Slice header
*
* Vinum drives start with this structure:
*
*\ Sector
* |--------------------------------------|
* | PDP-11 memorial boot block | 0
* |--------------------------------------|
* | Disk label, maybe | 1
* |--------------------------------------|
* | Slice definition (vinum_hdr) | 8
* |--------------------------------------|
* | |
* | Configuration info, first copy | 9
* | |
* |--------------------------------------|
* | |
* | Configuration info, second copy | 9 + size of config
* | |
* |--------------------------------------|
*/
/* Sizes and offsets of our information */
enum {
VINUM_LABEL_OFFSET = 4096, /* offset of vinum label */
VINUMHEADERLEN = 512, /* size of vinum label */
VINUM_CONFIG_OFFSET = 4608, /* offset of first config copy */
MAXCONFIG = 65536, /* and size of config copy */
DATASTART = (MAXCONFIG * 2 + VINUM_CONFIG_OFFSET) / DEV_BSIZE /* this is where the data starts */
};
/*
* hostname is 256 bytes long, but we don't need to shlep
* multiple copies in vinum. We use the host name just
* to identify this system, and 32 bytes should be ample
* for that purpose
*/
struct vinum_label {
char sysname[VINUMHOSTNAMELEN]; /* system name at time of creation */
char name[MAXDRIVENAME]; /* our name of the drive */
struct timeval date_of_birth; /* the time it was created */
struct timeval last_update; /* and the time of last update */
/*
* total size in bytes of the drive. This value
* includes the headers.
*/
off_t drive_size;
};
struct vinum_hdr {
uint64_t magic; /* we're long on magic numbers */
#define VINUM_MAGIC 22322600044678729LL /* should be this */
#define VINUM_NOMAGIC 22322600044678990LL /* becomes this after obliteration */
/*
* Size in bytes of each copy of the
* configuration info. This must be a multiple
* of the sector size.
*/
int config_length;
struct vinum_label label; /* unique label */
};
/* Information returned from read_drive_label */
enum drive_label_info {
DL_CANT_OPEN, /* invalid partition */
DL_NOT_OURS, /* valid partition, but no vinum label */
DL_DELETED_LABEL, /* valid partition, deleted label found */
DL_WRONG_DRIVE, /* drive name doesn't match */
DL_OURS /* valid partition and label found */
};
/* kinds of plex organization */
enum plexorg {
plex_disorg, /* disorganized */
plex_concat, /* concatenated plex */
plex_striped, /* striped plex */
plex_raid4, /* RAID4 plex */
plex_raid5 /* RAID5 plex */
};
/* Recognize plex organizations */
#define isstriped(p) (p->organization >= plex_striped) /* RAID 1, 4 or 5 */
#define isparity(p) (p->organization >= plex_raid4) /* RAID 4 or 5 */
/* Address range definitions, for locking volumes */
struct rangelock {
daddr_t stripe; /* address + 1 of the range being locked */
struct buf *bp; /* user's buffer pointer */
};
struct drive_freelist { /* sorted list of free space on drive */
u_int64_t offset; /* offset of entry */
u_int64_t sectors; /* and length in sectors */
};
/*
* Include the structure definitions shared
* between userland and kernel.
*/
#ifdef _KERNEL
#include <dev/vinum/vinumobj.h>
#undef _KERNEL
#include <dev/vinum/vinumobj.h>
#define _KERNEL
#else
#include <dev/vinum/vinumobj.h>
#endif
/*
* Table expansion. Expand table, which contains oldcount
* entries of type element, by increment entries, and change
* oldcount accordingly
*/
#ifdef VINUMDEBUG
#define EXPAND(table, element, oldcount, increment) \
{ \
expand_table ((void **) &table, \
oldcount * sizeof (element), \
(oldcount + increment) * sizeof (element), \
__FILE__, \
__LINE__ ); \
oldcount += increment; \
}
#else
#define EXPAND(table, element, oldcount, increment) \
{ \
expand_table ((void **) &table, \
oldcount * sizeof (element), \
(oldcount + increment) * sizeof (element)); \
oldcount += increment; \
}
#endif
/* Information on vinum's memory usage */
struct meminfo {
int mallocs; /* number of malloced blocks */
int total_malloced; /* total amount malloced */
int highwater; /* maximum number of mallocs */
struct mc *malloced; /* pointer to kernel table */
};
#define MCFILENAMELEN 16
struct mc {
struct timeval time;
int seq;
int size;
short line;
caddr_t address;
char file[MCFILENAMELEN];
};
/*
* These enums are used by the state transition
* routines. They're in bit map format:
*
* Bit 0: Other plexes in the volume are down
* Bit 1: Other plexes in the volume are up
* Bit 2: The current plex is up
* Maybe they should be local to
* state.c
*/
enum volplexstate {
volplex_onlyusdown = 0, /* 0: we're the only plex, and we're down */
volplex_alldown, /* 1: another plex is down, and so are we */
volplex_otherup, /* 2: another plex is up */
volplex_otherupdown, /* 3: other plexes are up and down */
volplex_onlyus, /* 4: we're up and alone */
volplex_onlyusup, /* 5: only we are up, others are down */
volplex_allup, /* 6: all plexes are up */
volplex_someup /* 7: some plexes are up, including us */
};
/* state map for plex */
enum sdstates {
sd_emptystate = 1,
sd_downstate = 2, /* SD is down */
sd_crashedstate = 4, /* SD is crashed */
sd_obsoletestate = 8, /* SD is obsolete */
sd_stalestate = 16, /* SD is stale */
sd_rebornstate = 32, /* SD is reborn */
sd_upstate = 64, /* SD is up */
sd_initstate = 128, /* SD is initializing */
sd_initializedstate = 256, /* SD is initialized */
sd_otherstate = 512, /* SD is in some other state */
};
/*
* This is really just a parameter to pass to
* set_<foo>_state, but since it needs to be known
* in the external definitions, we need to define
* it here
*/
enum setstateflags {
setstate_none = 0, /* no flags */
setstate_force = 1, /* force the state change */
setstate_configuring = 2, /* we're currently configuring, don't save */
};
/* Operations for parityops to perform. */
enum parityop {
checkparity,
rebuildparity,
rebuildandcheckparity, /* rebuildparity with the -v option */
};
/*
* When doing round-robin reads from a multi-plex volume, switch to the
* next plex if the difference of the last read sector and the next sector
* to be read is this many sectors.
*/
#define ROUNDROBIN_SWITCH 128 /* 64k */
#ifdef VINUMDEBUG
/* Debugging stuff */
enum debugflags {
DEBUG_ADDRESSES = 1, /* show buffer information during requests */
DEBUG_NUMOUTPUT = 2, /* show the value of vp->v_numoutput */
DEBUG_RESID = 4, /* go into debugger in complete_rqe */
DEBUG_LASTREQS = 8, /* keep a circular buffer of last requests */
DEBUG_REVIVECONFLICT = 16, /* print info about revive conflicts */
DEBUG_EOFINFO = 32, /* print info about EOF detection */
DEBUG_MEMFREE = 64, /* keep info about Frees */
DEBUG_BIGDRIVE = 128, /* pretend our drives are 100 times the size */
DEBUG_REMOTEGDB = 256, /* go into remote gdb */
DEBUG_WARNINGS = 512, /* log various relatively harmless warnings */
DEBUG_LOCKREQS = 1024, /* log locking requests */
};
#ifdef _KERNEL
#ifdef __i386__
#define longjmp LongJmp /* test our longjmps */
#endif
#endif
#endif
/* Local Variables: */
/* fill-column: 50 */
/* End: */