mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
651 lines
25 KiB
C
651 lines
25 KiB
C
/*-
|
|
* 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 1.36 2001/01/14 06:34:57 grog Exp $
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/time.h>
|
|
#include <dev/vinum/vinumstate.h>
|
|
#include <sys/mutex.h>
|
|
|
|
/*
|
|
* 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 {
|
|
VINUM_HEADER = 512, /* size of header on disk */
|
|
MAXCONFIGLINE = 1024, /* maximum size of a single config line */
|
|
MINVINUMSLICE = 1048576, /* minimum size of a slice */
|
|
|
|
VINUM_CDEV_MAJOR = 91, /* major number for character device */
|
|
|
|
ROUND_ROBIN_READPOL = -1, /* round robin read policy */
|
|
|
|
/* type field in minor number */
|
|
VINUM_VOLUME_TYPE = 0,
|
|
VINUM_PLEX_TYPE = 1,
|
|
VINUM_SD_TYPE = 2,
|
|
VINUM_DRIVE_TYPE = 3,
|
|
VINUM_SUPERDEV_TYPE = 4, /* super device. */
|
|
VINUM_RAWPLEX_TYPE = 5, /* anonymous plex */
|
|
VINUM_RAWSD_TYPE = 6, /* anonymous subdisk */
|
|
|
|
/* Shifts for the individual fields in the device */
|
|
VINUM_TYPE_SHIFT = 28,
|
|
VINUM_VOL_SHIFT = 0,
|
|
VINUM_PLEX_SHIFT = 16,
|
|
VINUM_SD_SHIFT = 20,
|
|
VINUM_VOL_WIDTH = 8,
|
|
VINUM_PLEX_WIDTH = 3,
|
|
VINUM_SD_WIDTH = 8,
|
|
|
|
/*
|
|
* Shifts for the second half of raw plex and
|
|
* subdisk numbers
|
|
*/
|
|
VINUM_RAWPLEX_SHIFT = 8, /* shift the second half this much */
|
|
VINUM_RAWPLEX_WIDTH = 12, /* width of second half */
|
|
|
|
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 a minor device number.
|
|
* This is not used directly; instead, it's
|
|
* called by the other macros.
|
|
*/
|
|
#define VINUMMINOR(v,p,s,t) ( (v << VINUM_VOL_SHIFT) \
|
|
| (p << VINUM_PLEX_SHIFT) \
|
|
| (s << VINUM_SD_SHIFT) \
|
|
| (t << VINUM_TYPE_SHIFT) )
|
|
|
|
/* Create device minor numbers */
|
|
#define VINUMDEV(v,p,s,t) makedev (VINUM_CDEV_MAJOR, VINUMMINOR (v, p, s, t))
|
|
|
|
#define VINUM_PLEX(p) makedev (VINUM_CDEV_MAJOR, \
|
|
(VINUM_RAWPLEX_TYPE << VINUM_TYPE_SHIFT) \
|
|
| (p & 0xff) \
|
|
| ((p & ~0xff) << 8) )
|
|
|
|
#define VINUM_SD(s) makedev (VINUM_CDEV_MAJOR, \
|
|
(VINUM_RAWSD_TYPE << VINUM_TYPE_SHIFT) \
|
|
| (s & 0xff) \
|
|
| ((s & ~0xff) << 8) )
|
|
|
|
/* Create a bit mask for x bits */
|
|
#define MASK(x) ((1 << (x)) - 1)
|
|
|
|
/* Create a raw block device minor number */
|
|
#define VINUMRMINOR(d,t) ( ((d & MASK (VINUM_VOL_WIDTH)) << VINUM_VOL_SHIFT) \
|
|
| ((d & ~MASK (VINUM_VOL_WIDTH)) \
|
|
<< (VINUM_PLEX_SHIFT + VINUM_VOL_WIDTH)) \
|
|
| (t << VINUM_TYPE_SHIFT) )
|
|
|
|
/* extract device type */
|
|
#define DEVTYPE(x) ((minor (x) >> VINUM_TYPE_SHIFT) & 7)
|
|
|
|
/*
|
|
* This mess is used to catch people who compile
|
|
* a debug vinum(8) and non-debug kernel module,
|
|
* or the other way round.
|
|
*/
|
|
|
|
#ifdef VINUMDEBUG
|
|
#define VINUM_SUPERDEV VINUMMINOR (1, 0, 0, VINUM_SUPERDEV_TYPE) /* superdevice number */
|
|
#define VINUM_WRONGSUPERDEV VINUMMINOR (2, 0, 0, VINUM_SUPERDEV_TYPE) /* non-debug superdevice number */
|
|
#else
|
|
#define VINUM_SUPERDEV VINUMMINOR (2, 0, 0, VINUM_SUPERDEV_TYPE) /* superdevice number */
|
|
#define VINUM_WRONGSUPERDEV VINUMMINOR (1, 0, 0, VINUM_SUPERDEV_TYPE) /* debug superdevice number */
|
|
#endif
|
|
|
|
#define VINUM_DAEMON_DEV VINUMMINOR (0, 0, 0, VINUM_SUPERDEV_TYPE) /* daemon superdevice number */
|
|
|
|
/*
|
|
* 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 */
|
|
MAX_REVIVE_BLOCKSIZE = MAXPHYS, /* maximum revive block size */
|
|
DEFAULT_REVIVE_BLOCKSIZE = 65536, /* default revive block size */
|
|
VINUMHOSTNAMELEN = 32, /* host name field in label */
|
|
};
|
|
|
|
/* device numbers */
|
|
|
|
/*
|
|
* 31 30 28 27 20 19 18 16 15 8 7 0
|
|
* |-----------------------------------------------------------------------------------------------|
|
|
* |X | Type | Subdisk number | X| Plex | Major number | volume number |
|
|
* |-----------------------------------------------------------------------------------------------|
|
|
*
|
|
* 0x2 03 1 19 06
|
|
*
|
|
* The fields in the minor number are interpreted as follows:
|
|
*
|
|
* Volume: Only type and volume number are relevant
|
|
* Plex in volume: type, plex number in volume and volume number are relevant
|
|
* raw plex: type, plex number is made of bits 27-16 and 7-0
|
|
* raw subdisk: type, subdisk number is made of bits 27-16 and 7-0
|
|
*/
|
|
|
|
/* This doesn't get used. Consider removing it. */
|
|
struct devcode {
|
|
/*
|
|
* CARE. These fields assume a big-endian word. On a
|
|
* little-endian system, they're the wrong way around
|
|
*/
|
|
unsigned volume:8; /* up to 256 volumes */
|
|
unsigned major:8; /* this is where the major number fits */
|
|
unsigned plex:3; /* up to 8 plexes per volume */
|
|
unsigned unused:1; /* up for grabs */
|
|
unsigned sd:8; /* up to 256 subdisks per plex */
|
|
unsigned type:3; /* type of object */
|
|
/*
|
|
* type field
|
|
VINUM_VOLUME = 0,
|
|
VINUM_PLEX = 1,
|
|
VINUM_SUBDISK = 2,
|
|
VINUM_DRIVE = 3,
|
|
VINUM_SUPERDEV = 4,
|
|
VINUM_RAWPLEX = 5,
|
|
VINUM_RAWSD = 6 */
|
|
unsigned signbit:1; /* to make 32 bits */
|
|
};
|
|
|
|
#define VINUM_DIR "/dev/vinum"
|
|
|
|
/*
|
|
* These definitions help catch
|
|
* userland/kernel mismatches.
|
|
*/
|
|
#if VINUMDEBUG
|
|
#define VINUM_WRONGSUPERDEV_NAME VINUM_DIR"/control" /* normal super device */
|
|
#define VINUM_SUPERDEV_NAME VINUM_DIR"/Control" /* debug super device */
|
|
#else
|
|
#define VINUM_WRONGSUPERDEV_NAME VINUM_DIR"/Control" /* debug super device */
|
|
#define VINUM_SUPERDEV_NAME VINUM_DIR"/control" /* normal super device */
|
|
#endif
|
|
#define VINUM_DAEMON_DEV_NAME VINUM_DIR"/controld" /* super device for daemon only */
|
|
|
|
/*
|
|
* Flags for all objects. Most of them only apply to
|
|
* specific objects, but we have space for all in any
|
|
* 32 bit flags word.
|
|
*/
|
|
enum objflags {
|
|
VF_LOCKED = 1, /* somebody has locked access to this object */
|
|
VF_LOCKING = 2, /* we want access to this object */
|
|
VF_OPEN = 4, /* object has openers */
|
|
VF_WRITETHROUGH = 8, /* volume: write through */
|
|
VF_INITED = 0x10, /* unit has been initialized */
|
|
VF_WLABEL = 0x20, /* label area is writable */
|
|
VF_LABELLING = 0x40, /* unit is currently being labelled */
|
|
VF_WANTED = 0x80, /* someone is waiting to obtain a lock */
|
|
VF_RAW = 0x100, /* raw volume (no file system) */
|
|
VF_LOADED = 0x200, /* module is loaded */
|
|
VF_CONFIGURING = 0x400, /* somebody is changing the config */
|
|
VF_WILL_CONFIGURE = 0x800, /* somebody wants to change the config */
|
|
VF_CONFIG_INCOMPLETE = 0x1000, /* haven't finished changing the config */
|
|
VF_CONFIG_SETUPSTATE = 0x2000, /* set a volume up if all plexes are empty */
|
|
VF_READING_CONFIG = 0x4000, /* we're reading config database from disk */
|
|
VF_FORCECONFIG = 0x8000, /* configure drives even with different names */
|
|
VF_NEWBORN = 0x10000, /* for objects: we've just created it */
|
|
VF_CONFIGURED = 0x20000, /* for drives: we read the config */
|
|
VF_STOPPING = 0x40000, /* for vinum_conf: stop on last close */
|
|
VF_DAEMONOPEN = 0x80000, /* the daemon has us open (only superdev) */
|
|
VF_CREATED = 0x100000, /* for volumes: freshly created, more then new */
|
|
VF_HOTSPARE = 0x200000, /* for drives: use as hot spare */
|
|
};
|
|
|
|
/* Global configuration information for the vinum subsystem */
|
|
struct _vinum_conf {
|
|
/* Pointers to vinum structures */
|
|
struct drive *drive;
|
|
struct sd *sd;
|
|
struct plex *plex;
|
|
struct volume *volume;
|
|
|
|
/* the number allocated */
|
|
int drives_allocated;
|
|
int subdisks_allocated;
|
|
int plexes_allocated;
|
|
int volumes_allocated;
|
|
|
|
/* and the number currently in use */
|
|
int drives_used;
|
|
int subdisks_used;
|
|
int plexes_used;
|
|
int volumes_used;
|
|
|
|
int flags;
|
|
|
|
#define VINUM_MAXACTIVE 30000 /* maximum number of active requests */
|
|
int active; /* current number of requests outstanding */
|
|
int maxactive; /* maximum number of requests ever outstanding */
|
|
#if VINUMDEBUG
|
|
struct request *lastrq;
|
|
struct buf *lastbuf;
|
|
#endif
|
|
};
|
|
|
|
/* Use these defines to simplify code */
|
|
#define DRIVE vinum_conf.drive
|
|
#define SD vinum_conf.sd
|
|
#define PLEX vinum_conf.plex
|
|
#define VOL vinum_conf.volume
|
|
#define VFLAGS vinum_conf.flags
|
|
|
|
/*
|
|
* 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 */
|
|
};
|
|
|
|
/*** Drive definitions ***/
|
|
/*
|
|
* A drive corresponds to a disk slice. We use a different term to show
|
|
* the difference in usage: it doesn't have to be a slice, and could
|
|
* theoretically be a complete, unpartitioned disk
|
|
*/
|
|
|
|
struct drive {
|
|
enum drivestate state; /* current state */
|
|
int flags; /* flags */
|
|
int subdisks_allocated; /* number of entries in sd */
|
|
int subdisks_used; /* and the number used */
|
|
int blocksize; /* size of fs blocks */
|
|
int pid; /* of locker */
|
|
u_int64_t sectors_available; /* number of sectors still available */
|
|
int secsperblock;
|
|
int lasterror; /* last error on drive */
|
|
int driveno; /* index of drive in vinum_conf */
|
|
int opencount; /* number of up subdisks */
|
|
u_int64_t reads; /* number of reads on this drive */
|
|
u_int64_t writes; /* number of writes on this drive */
|
|
u_int64_t bytes_read; /* number of bytes read */
|
|
u_int64_t bytes_written; /* number of bytes written */
|
|
char devicename[MAXDRIVENAME]; /* name of the slice it's on */
|
|
dev_t dev; /* device information */
|
|
struct vinum_label label; /* and the label information */
|
|
struct partinfo partinfo; /* partition information */
|
|
int freelist_size; /* number of entries alloced in free list */
|
|
int freelist_entries; /* number of entries used in free list */
|
|
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 */
|
|
} *freelist;
|
|
#define DRIVE_MAXACTIVE 30000 /* maximum number of active requests */
|
|
int active; /* current number of requests outstanding */
|
|
int maxactive; /* maximum number of requests ever outstanding */
|
|
#ifdef VINUMDEBUG
|
|
char lockfilename[16]; /* name of file from which we were locked */
|
|
int lockline; /* and the line number */
|
|
#endif
|
|
};
|
|
|
|
/*** Subdisk definitions ***/
|
|
|
|
struct sd {
|
|
enum sdstate state; /* state */
|
|
int flags;
|
|
int lasterror; /* last error occurred */
|
|
/* offsets in blocks */
|
|
int64_t driveoffset; /* offset on drive */
|
|
/*
|
|
* plexoffset is the offset from the beginning
|
|
* of the plex to the very first part of the
|
|
* subdisk, in sectors. For striped, RAID-4 and
|
|
* RAID-5 plexes, only the first stripe is
|
|
* located at this offset
|
|
*/
|
|
int64_t plexoffset; /* offset in plex */
|
|
u_int64_t sectors; /* and length in sectors */
|
|
int plexno; /* index of plex, if it belongs */
|
|
int driveno; /* index of the drive on which it is located */
|
|
int sdno; /* our index in vinum_conf */
|
|
int plexsdno; /* and our number in our plex */
|
|
/* (undefined if no plex) */
|
|
u_int64_t reads; /* number of reads on this subdisk */
|
|
u_int64_t writes; /* number of writes on this subdisk */
|
|
u_int64_t bytes_read; /* number of bytes read */
|
|
u_int64_t bytes_written; /* number of bytes written */
|
|
/* revive parameters */
|
|
u_int64_t revived; /* block number of current revive request */
|
|
int revive_blocksize; /* revive block size (bytes) */
|
|
int revive_interval; /* and time to wait between transfers */
|
|
pid_t reviver; /* PID of reviving process */
|
|
struct request *waitlist; /* list of requests waiting on revive op */
|
|
/* init parameters */
|
|
u_int64_t initialized; /* block number of current init request */
|
|
int init_blocksize; /* init block size (bytes) */
|
|
int init_interval; /* and time to wait between transfers */
|
|
char name[MAXSDNAME]; /* name of subdisk */
|
|
dev_t dev;
|
|
};
|
|
|
|
/*** Plex definitions ***/
|
|
|
|
/* 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 */
|
|
|
|
struct plex {
|
|
enum plexorg organization; /* Plex organization */
|
|
enum plexstate state; /* and current state */
|
|
u_int64_t length; /* total length of plex (sectors) */
|
|
int flags;
|
|
int stripesize; /* size of stripe or raid band, in sectors */
|
|
int subdisks; /* number of associated subdisks */
|
|
int subdisks_allocated; /* number of subdisks allocated space for */
|
|
int *sdnos; /* list of component subdisks */
|
|
int plexno; /* index of plex in vinum_conf */
|
|
int volno; /* index of volume */
|
|
int volplexno; /* number of plex in volume */
|
|
/* Lock information */
|
|
struct mtx lockmtx;
|
|
int usedlocks; /* number currently in use */
|
|
int lockwaits; /* and number of waits for locks */
|
|
struct rangelock *lock; /* ranges of locked addresses */
|
|
off_t checkblock; /* block number for parity op */
|
|
/* Statistics */
|
|
u_int64_t reads; /* number of reads on this plex */
|
|
u_int64_t writes; /* number of writes on this plex */
|
|
u_int64_t bytes_read; /* number of bytes read */
|
|
u_int64_t bytes_written; /* number of bytes written */
|
|
u_int64_t recovered_reads; /* number of recovered read operations */
|
|
u_int64_t degraded_writes; /* number of degraded writes */
|
|
u_int64_t parityless_writes; /* number of parityless writes */
|
|
u_int64_t multiblock; /* requests that needed more than one block */
|
|
u_int64_t multistripe; /* requests that needed more than one stripe */
|
|
int sddowncount; /* number of subdisks down */
|
|
char name[MAXPLEXNAME]; /* name of plex */
|
|
dev_t dev;
|
|
};
|
|
|
|
/*** Volume definitions ***/
|
|
|
|
/* 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 volume {
|
|
enum volumestate state; /* current state */
|
|
int plexes; /* number of plexes */
|
|
int preferred_plex; /* plex to read from, -1 for round-robin */
|
|
/*
|
|
* index of plex used for last read, for
|
|
* round-robin.
|
|
*/
|
|
int last_plex_read;
|
|
int volno; /* volume number */
|
|
int flags; /* status and configuration flags */
|
|
int openflags; /* flags supplied to last open(2) */
|
|
u_int64_t size; /* size of volume */
|
|
int blocksize; /* logical block size */
|
|
int active; /* number of outstanding requests active */
|
|
int subops; /* and the number of suboperations */
|
|
/* Statistics */
|
|
u_int64_t bytes_read; /* number of bytes read */
|
|
u_int64_t bytes_written; /* number of bytes written */
|
|
u_int64_t reads; /* number of reads on this volume */
|
|
u_int64_t writes; /* number of writes on this volume */
|
|
u_int64_t recovered_reads; /* reads recovered from another plex */
|
|
/*
|
|
* Unlike subdisks in the plex, space for the
|
|
* plex pointers is static.
|
|
*/
|
|
int plex[MAXPLEX]; /* index of plexes */
|
|
char name[MAXVOLNAME]; /* name of volume */
|
|
struct disklabel label; /* for DIOCGPART */
|
|
dev_t dev;
|
|
};
|
|
|
|
/*
|
|
* Table expansion. Expand table, which contains oldcount
|
|
* entries of type element, by increment entries, and change
|
|
* oldcount accordingly
|
|
*/
|
|
#define EXPAND(table, element, oldcount, increment) \
|
|
{ \
|
|
expand_table ((void **) &table, \
|
|
oldcount * sizeof (element), \
|
|
(oldcount + increment) * sizeof (element) ); \
|
|
oldcount += increment; \
|
|
}
|
|
|
|
/* 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 */
|
|
};
|
|
|
|
#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 */
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
#ifdef __i386__
|
|
#define longjmp LongJmp /* test our longjmps */
|
|
#endif
|
|
#endif
|
|
#endif
|
|
/* Local Variables: */
|
|
/* fill-column: 50 */
|
|
/* End: */
|