/*- * 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 $ * $FreeBSD$ */ #include #include #include /* 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 #undef _KERNEL #include #define _KERNEL #else #include #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__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: */