diff options
author | grog <grog@FreeBSD.org> | 2001-05-22 02:37:28 +0000 |
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committer | grog <grog@FreeBSD.org> | 2001-05-22 02:37:28 +0000 |
commit | 32e728a5c961f3d44bf93e52a8c7b01023b8ff09 (patch) | |
tree | 00068d67be6317798945fda0d2aa12440ee3a74f /sys/dev/vinum/vinumvar.h | |
parent | 9fadf0687c2d363b33a199a6e5929f61b99cda0b (diff) | |
download | FreeBSD-src-32e728a5c961f3d44bf93e52a8c7b01023b8ff09.zip FreeBSD-src-32e728a5c961f3d44bf93e52a8c7b01023b8ff09.tar.gz |
Add a field 'version' to vinum_conf. This field is a constant which
gets incremented every time the kernel-userland interface changes.
This enables vinum(8) to check for the correct kernel version and to
produce a useful message if it doesn't match.
Requested by: Too many to count.
Move the definitions of struct drive, sd, plex and volume to
vinumobj.h.
Add a new debug flag, DEBUG_LOCKREQS, which logs only lock requests.
Diffstat (limited to 'sys/dev/vinum/vinumvar.h')
-rw-r--r-- | sys/dev/vinum/vinumvar.h | 221 |
1 files changed, 30 insertions, 191 deletions
diff --git a/sys/dev/vinum/vinumvar.h b/sys/dev/vinum/vinumvar.h index eb3e4c2..65e49d0 100644 --- a/sys/dev/vinum/vinumvar.h +++ b/sys/dev/vinum/vinumvar.h @@ -37,7 +37,7 @@ * 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 $ + * $Id: vinumvar.h,v 1.24 2000/03/01 02:34:57 grog Exp grog $ * $FreeBSD$ */ @@ -54,6 +54,12 @@ #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 */ @@ -130,6 +136,7 @@ enum constants { << (VINUM_PLEX_SHIFT + VINUM_VOL_WIDTH)) \ | (t << VINUM_TYPE_SHIFT) ) + /* extract device type */ #define DEVTYPE(x) ((minor (x) >> VINUM_TYPE_SHIFT) & 7) @@ -229,9 +236,9 @@ struct devcode { #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. + * Flags for all objects. Most of them only apply + * to specific objects, but we currently have + * space for all in any 32 bit flags word. */ enum objflags { VF_LOCKED = 1, /* somebody has locked access to this object */ @@ -256,46 +263,9 @@ enum objflags { 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 */ + VF_RETRYERRORS = 0x400000, /* don't down subdisks on I/O errors */ }; -/* 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 * @@ -369,90 +339,6 @@ enum drive_label_info { 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 */ @@ -466,80 +352,32 @@ enum plexorg { #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; +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 @@ -637,6 +475,7 @@ enum debugflags { 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 |