/*- * Copyright (c) 2004 Lukas Ertl * Copyright (c) 1997, 1998, 1999 * Nan Yang Computer Services Limited. All rights reserved. * * Parts copyright (c) 1997, 1998 Cybernet Corporation, NetMAX project. * Parts 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. * * $FreeBSD$ */ #ifndef _GEOM_VINUM_VAR_H_ #define _GEOM_VINUM_VAR_H_ /* * 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. */ #define GV_HDR_OFFSET 4096 /* Offset of vinum header. */ #define GV_HDR_LEN 512 /* Size of vinum header. */ #define GV_CFG_OFFSET 4608 /* Offset of first config copy. */ #define GV_CFG_LEN 65536 /* Size of config copy. */ /* This is where the actual data starts. */ #define GV_DATA_START (GV_CFG_LEN * 2 + GV_CFG_OFFSET) /* #define GV_DATA_START (GV_CFG_LEN * 2 + GV_HDR_LEN) */ #define GV_MAXDRIVENAME 32 /* Maximum length of a device name. */ #define GV_MAXSDNAME 64 /* Maximum length of a subdisk name. */ #define GV_MAXPLEXNAME 64 /* Maximum length of a plex name. */ #define GV_MAXVOLNAME 64 /* Maximum length of a volume name. */ /* Command line flags. */ #define GV_FLAG_R 0x01 #define GV_FLAG_S 0x02 #define GV_FLAG_V 0x04 #define GV_FLAG_VV 0x08 #define GV_FLAG_F 0x10 /* Object types. */ #define GV_TYPE_VOL 1 #define GV_TYPE_PLEX 2 #define GV_TYPE_SD 3 #define GV_TYPE_DRIVE 4 /* State changing flags. */ #define GV_SETSTATE_FORCE 0x1 #define GV_SETSTATE_CONFIG 0x2 /* Subdisk state bitmaps for plexes. */ #define GV_SD_DOWNSTATE 0x01 /* Subdisk is down. */ #define GV_SD_STALESTATE 0x02 /* Subdisk is stale. */ #define GV_SD_INITSTATE 0x04 /* Subdisk is initializing. */ #define GV_SD_UPSTATE 0x08 /* Subdisk is up. */ /* Synchronization/initialization request sizes. */ #define GV_MIN_SYNCSIZE 512 #define GV_MAX_SYNCSIZE MAXPHYS #define GV_DFLT_SYNCSIZE 65536 /* Flags for BIOs, as they are processed within vinum. */ #define GV_BIO_DONE 0x01 #define GV_BIO_MALLOC 0x02 #define GV_BIO_ONHOLD 0x04 #define GV_BIO_SYNCREQ 0x08 #define GV_BIO_SUCCEED 0x10 #define GV_BIO_REBUILD 0x20 #define GV_BIO_CHECK 0x40 #define GV_BIO_PARITY 0x80 /* * 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. */ #define GV_HOSTNAME_LEN 32 struct gv_label { char sysname[GV_HOSTNAME_LEN]; /* System name at creation time. */ char name[GV_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. */ off_t drive_size; /* Total size incl. headers. */ }; /* The 'header' of each valid vinum drive. */ struct gv_hdr { uint64_t magic; #define GV_MAGIC 22322600044678729LL #define GV_NOMAGIC 22322600044678990LL int config_length; struct gv_label label; }; /* A single freelist entry of a drive. */ struct gv_freelist { off_t size; /* Size of this free slot. */ off_t offset; /* Offset on the drive. */ LIST_ENTRY(gv_freelist) freelist; }; /* * Since we share structures between userland and kernel, we need this helper * struct instead of struct bio_queue_head and friends. Maybe I find a proper * solution some day. */ struct gv_bioq { struct bio *bp; TAILQ_ENTRY(gv_bioq) queue; }; /* This struct contains the main vinum config. */ struct gv_softc { /*struct mtx config_mtx; XXX not yet */ /* Linked lists of all objects in our setup. */ LIST_HEAD(,gv_drive) drives; /* All drives. */ LIST_HEAD(,gv_plex) plexes; /* All plexes. */ LIST_HEAD(,gv_sd) subdisks; /* All subdisks. */ LIST_HEAD(,gv_volume) volumes; /* All volumes. */ struct g_geom *geom; /* Pointer to our VINUM geom. */ }; /* softc for a drive. */ struct gv_drive { char name[GV_MAXDRIVENAME]; /* The name of this drive. */ char device[GV_MAXDRIVENAME]; /* Associated device. */ int state; /* The state of this drive. */ #define GV_DRIVE_DOWN 0 #define GV_DRIVE_UP 1 off_t size; /* Size of this drive. */ off_t avail; /* Available space. */ int sdcount; /* Number of subdisks. */ int flags; #define GV_DRIVE_THREAD_ACTIVE 0x01 /* Drive has an active worker thread. */ #define GV_DRIVE_THREAD_DIE 0x02 /* Signal the worker thread to die. */ #define GV_DRIVE_THREAD_DEAD 0x04 /* The worker thread has died. */ struct gv_hdr *hdr; /* The drive header. */ int freelist_entries; /* Count of freelist entries. */ LIST_HEAD(,gv_freelist) freelist; /* List of freelist entries. */ LIST_HEAD(,gv_sd) subdisks; /* Subdisks on this drive. */ LIST_ENTRY(gv_drive) drive; /* Entry in the vinum config. */ TAILQ_HEAD(,gv_bioq) bqueue; /* BIO queue of this drive. */ struct mtx bqueue_mtx; /* Mtx. to protect the queue. */ struct g_geom *geom; /* The geom of this drive. */ struct gv_softc *vinumconf; /* Pointer to the vinum conf. */ }; /* softc for a subdisk. */ struct gv_sd { char name[GV_MAXSDNAME]; /* The name of this subdisk. */ off_t size; /* The size of this subdisk. */ off_t drive_offset; /* Offset in the underlying drive. */ off_t plex_offset; /* Offset in the associated plex. */ int state; /* The state of this subdisk. */ #define GV_SD_DOWN 0 #define GV_SD_STALE 1 #define GV_SD_INITIALIZING 2 #define GV_SD_REVIVING 3 #define GV_SD_UP 4 off_t initialized; /* Count of initialized bytes. */ int init_size; /* Initialization read/write size. */ int init_error; /* Flag error on initialization. */ int flags; #define GV_SD_NEWBORN 0x01 /* Subdisk was just created. */ #define GV_SD_INITCANCEL 0x02 /* Cancel initialization process. */ char drive[GV_MAXDRIVENAME]; /* Name of underlying drive. */ char plex[GV_MAXPLEXNAME]; /* Name of associated plex. */ struct gv_drive *drive_sc; /* Pointer to underlying drive. */ struct gv_plex *plex_sc; /* Pointer to associated plex. */ struct g_provider *provider; /* The provider this sd represents. */ struct g_consumer *consumer; /* Consumer attached to our provider. */ LIST_ENTRY(gv_sd) from_drive; /* Subdisk list of underlying drive. */ LIST_ENTRY(gv_sd) in_plex; /* Subdisk list of associated plex. */ LIST_ENTRY(gv_sd) sd; /* Entry in the vinum config. */ struct gv_softc *vinumconf; /* Pointer to the vinum config. */ }; /* softc for a plex. */ struct gv_plex { char name[GV_MAXPLEXNAME]; /* The name of the plex. */ off_t size; /* The size of the plex. */ int state; /* The plex state. */ #define GV_PLEX_DOWN 0 #define GV_PLEX_INITIALIZING 1 #define GV_PLEX_DEGRADED 2 #define GV_PLEX_UP 3 int org; /* The plex organisation. */ #define GV_PLEX_DISORG 0 #define GV_PLEX_CONCAT 1 #define GV_PLEX_STRIPED 2 #define GV_PLEX_RAID5 4 int stripesize; /* The stripe size of the plex. */ char volume[GV_MAXVOLNAME]; /* Name of associated volume. */ struct gv_volume *vol_sc; /* Pointer to associated volume. */ int sdcount; /* Number of subdisks in this plex. */ int sddown; /* Number of subdisks that are down. */ int flags; #define GV_PLEX_ADDED 0x01 /* Added to an existing volume. */ #define GV_PLEX_SYNCING 0x02 /* Plex is syncing from another plex. */ #define GV_PLEX_THREAD_ACTIVE 0x04 /* Plex has an active RAID5 thread. */ #define GV_PLEX_THREAD_DIE 0x08 /* Signal the RAID5 thread to die. */ #define GV_PLEX_THREAD_DEAD 0x10 /* The RAID5 thread has died. */ #define GV_PLEX_NEWBORN 0x20 /* The plex was just created. */ off_t synced; /* Count of synced bytes. */ struct mtx bqueue_mtx; /* Lock for the BIO queue. */ TAILQ_HEAD(,gv_bioq) bqueue; /* BIO queue. */ TAILQ_HEAD(,gv_bioq) wqueue; /* Waiting BIO queue. */ TAILQ_HEAD(,gv_raid5_packet) packets; /* RAID5 sub-requests. */ LIST_HEAD(,gv_sd) subdisks; /* List of attached subdisks. */ LIST_ENTRY(gv_plex) in_volume; /* Plex list of associated volume. */ LIST_ENTRY(gv_plex) plex; /* Entry in the vinum config. */ struct g_provider *provider; /* The provider this plex represents. */ struct g_consumer *consumer; /* Consumer attached to our provider. */ struct g_geom *geom; /* The geom of this plex. */ struct gv_softc *vinumconf; /* Pointer to the vinum config. */ }; /* softc for a volume. */ struct gv_volume { char name[GV_MAXVOLNAME]; /* The name of the volume. */ off_t size; /* The size of the volume. */ int plexcount; /* Number of plexes. */ int state; /* The state of the volume. */ #define GV_VOL_DOWN 0 #define GV_VOL_UP 1 int flags; #define GV_VOL_THREAD_ACTIVE 0x01 /* Volume has an active thread. */ #define GV_VOL_THREAD_DIE 0x02 /* Signal the thread to die. */ #define GV_VOL_THREAD_DEAD 0x04 /* The thread has died. */ struct mtx bqueue_mtx; /* Lock for the BIO queue. */ TAILQ_HEAD(,gv_bioq) bqueue; /* BIO queue. */ LIST_HEAD(,gv_plex) plexes; /* List of attached plexes. */ LIST_ENTRY(gv_volume) volume; /* Entry in vinum config. */ struct g_geom *geom; /* The geom of this volume. */ struct gv_softc *vinumconf; /* Pointer to the vinum config. */ }; #endif /* !_GEOM_VINUM_VAR_H */