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d8d015cddc
This is necessary for two reasons:
1) In order to avoid collisions with the use of a BIOs flags set by a consumer
or a provider
2) Because GV_BIO_DONE was used to mark a BIO as done, not enough flags was
available, so the consumer flags of a BIO had to be misused in order to
support enough flags. The new queue makes it possible to recycle the
GV_BIO_DONE flag into GV_BIO_GROW.
As a consequence, gvinum will now work with any other GEOM class under it or
on top of it.
- Use bio_pflags for storing internal flags on downgoing BIOs, as the requests
appear to come from a consumer of a gvinum volume. Use bio_cflags only for
cloned BIOs.
- Move gv_post_bio to be used internally for maintenance requests.
- Remove some cases where flags where set without need.
PR: kern/133604
395 lines
14 KiB
C
395 lines
14 KiB
C
/*-
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* Copyright (c) 2004, 2007 Lukas Ertl
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* Copyright (c) 1997, 1998, 1999
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* Nan Yang Computer Services Limited. All rights reserved.
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*
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* Parts copyright (c) 1997, 1998 Cybernet Corporation, NetMAX project.
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* Parts written by Greg Lehey.
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*
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* This software is distributed under the so-called ``Berkeley
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* License'': *
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Nan Yang Computer
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* Services Limited.
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* 4. Neither the name of the Company nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* This software is provided ``as is'', and any express or implied
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* warranties, including, but not limited to, the implied warranties of
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* merchantability and fitness for a particular purpose are disclaimed.
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* In no event shall the company or contributors be liable for any * direct, indirect, incidental, special, exemplary, or consequential
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* damages (including, but not limited to, procurement of substitute
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* goods or services; loss of use, data, or profits; or business
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* interruption) however caused and on any theory of liability, whether
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* in contract, strict liability, or tort (including negligence or
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* otherwise) arising in any way out of the use of this software, even if
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* advised of the possibility of such damage.
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*
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* $FreeBSD$
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*/
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#ifndef _GEOM_VINUM_VAR_H_
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#define _GEOM_VINUM_VAR_H_
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/*
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* Slice header
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*
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* Vinum drives start with this structure:
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*
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*\ Sector
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* |--------------------------------------|
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* | PDP-11 memorial boot block | 0
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* |--------------------------------------|
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* | Disk label, maybe | 1
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* |--------------------------------------|
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* | Slice definition (vinum_hdr) | 8
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* |--------------------------------------|
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* | |
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* | Configuration info, first copy | 9
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* | |
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* |--------------------------------------|
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* | |
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* | Configuration info, second copy | 9 + size of config
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* | |
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* |--------------------------------------|
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*/
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/* Sizes and offsets of our information. */
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#define GV_HDR_OFFSET 4096 /* Offset of vinum header. */
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#define GV_HDR_LEN 512 /* Size of vinum header. */
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#define GV_CFG_OFFSET 4608 /* Offset of first config copy. */
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#define GV_CFG_LEN 65536 /* Size of config copy. */
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/* This is where the actual data starts. */
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#define GV_DATA_START (GV_CFG_LEN * 2 + GV_CFG_OFFSET)
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/* #define GV_DATA_START (GV_CFG_LEN * 2 + GV_HDR_LEN) */
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#define GV_MAXDRIVENAME 32 /* Maximum length of a device name. */
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#define GV_MAXSDNAME 64 /* Maximum length of a subdisk name. */
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#define GV_MAXPLEXNAME 64 /* Maximum length of a plex name. */
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#define GV_MAXVOLNAME 64 /* Maximum length of a volume name. */
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/* Command line flags. */
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#define GV_FLAG_R 0x01
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#define GV_FLAG_S 0x02
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#define GV_FLAG_V 0x04
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#define GV_FLAG_VV 0x08
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#define GV_FLAG_F 0x10
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/* Object types. */
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#define GV_TYPE_VOL 1
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#define GV_TYPE_PLEX 2
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#define GV_TYPE_SD 3
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#define GV_TYPE_DRIVE 4
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/* State changing flags. */
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#define GV_SETSTATE_FORCE 0x1
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#define GV_SETSTATE_CONFIG 0x2
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/* Subdisk state bitmaps for plexes. */
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#define GV_SD_DOWNSTATE 0x01 /* Subdisk is down. */
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#define GV_SD_STALESTATE 0x02 /* Subdisk is stale. */
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#define GV_SD_INITSTATE 0x04 /* Subdisk is initializing. */
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#define GV_SD_UPSTATE 0x08 /* Subdisk is up. */
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/* Synchronization/initialization request sizes. */
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#define GV_MIN_SYNCSIZE 512
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#define GV_MAX_SYNCSIZE MAXPHYS
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#define GV_DFLT_SYNCSIZE 65536
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/* Flags for BIOs, as they are processed within vinum. */
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#define GV_BIO_GROW 0x01
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#define GV_BIO_MALLOC 0x02
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#define GV_BIO_ONHOLD 0x04
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#define GV_BIO_SYNCREQ 0x08
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#define GV_BIO_INIT 0x10
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#define GV_BIO_REBUILD 0x20
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#define GV_BIO_CHECK 0x40
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#define GV_BIO_PARITY 0x80
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#define GV_BIO_INTERNAL \
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(GV_BIO_SYNCREQ | GV_BIO_INIT | GV_BIO_REBUILD | GV_BIO_CHECK | GV_BIO_GROW)
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/* Error codes to be used within gvinum. */
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#define GV_ERR_SETSTATE (-1) /* Error setting state. */
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#define GV_ERR_BADSIZE (-2) /* Object has wrong size. */
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#define GV_ERR_INVTYPE (-3) /* Invalid object type. */
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#define GV_ERR_CREATE (-4) /* Error creating gvinum object. */
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#define GV_ERR_ISBUSY (-5) /* Object is busy. */
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#define GV_ERR_ISATTACHED (-6) /* Object is attached to another. */
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#define GV_ERR_INVFLAG (-7) /* Invalid flag passed. */
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#define GV_ERR_INVSTATE (-8) /* Invalid state. */
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#define GV_ERR_NOTFOUND (-9) /* Object not found. */
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#define GV_ERR_NAMETAKEN (-10) /* Object name is taken. */
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#define GV_ERR_NOSPACE (-11) /* No space left on drive/subdisk. */
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#define GV_ERR_BADOFFSET (-12) /* Invalid offset specified. */
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#define GV_ERR_INVNAME (-13) /* Invalid object name. */
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#define GV_ERR_PLEXORG (-14) /* Invalid plex organization. */
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/*
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* hostname is 256 bytes long, but we don't need to shlep multiple copies in
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* vinum. We use the host name just to identify this system, and 32 bytes
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* should be ample for that purpose.
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*/
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#define GV_HOSTNAME_LEN 32
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struct gv_label {
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char sysname[GV_HOSTNAME_LEN]; /* System name at creation time. */
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char name[GV_MAXDRIVENAME]; /* Our name of the drive. */
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struct timeval date_of_birth; /* The time it was created ... */
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struct timeval last_update; /* ... and the time of last update. */
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off_t drive_size; /* Total size incl. headers. */
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};
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/* The 'header' of each valid vinum drive. */
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struct gv_hdr {
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uint64_t magic;
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#define GV_OLD_MAGIC 0x494E2056494E4F00LL
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#define GV_OLD_NOMAGIC 0x4E4F2056494E4F00LL
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#define GV_MAGIC 0x56494E554D2D3100LL
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#define GV_NOMAGIC 0x56494E554D2D2D00LL
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uint64_t config_length;
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struct gv_label label;
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};
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/* A single freelist entry of a drive. */
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struct gv_freelist {
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off_t size; /* Size of this free slot. */
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off_t offset; /* Offset on the drive. */
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LIST_ENTRY(gv_freelist) freelist;
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};
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/*
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* Since we share structures between userland and kernel, we need this helper
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* struct instead of struct bio_queue_head and friends. Maybe I find a proper
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* solution some day.
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*/
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struct gv_bioq {
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struct bio *bp;
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TAILQ_ENTRY(gv_bioq) queue;
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};
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#define GV_EVENT_DRIVE_TASTED 1
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#define GV_EVENT_DRIVE_LOST 2
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#define GV_EVENT_THREAD_EXIT 3
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#define GV_EVENT_CREATE_DRIVE 4
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#define GV_EVENT_CREATE_VOLUME 5
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#define GV_EVENT_CREATE_PLEX 6
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#define GV_EVENT_CREATE_SD 7
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#define GV_EVENT_SAVE_CONFIG 8
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#define GV_EVENT_RM_VOLUME 9
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#define GV_EVENT_RM_PLEX 10
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#define GV_EVENT_RM_SD 11
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#define GV_EVENT_RM_DRIVE 12
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#define GV_EVENT_SET_SD_STATE 13
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#define GV_EVENT_SET_DRIVE_STATE 14
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#define GV_EVENT_SET_VOL_STATE 15
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#define GV_EVENT_SET_PLEX_STATE 16
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#define GV_EVENT_RESET_CONFIG 17
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#define GV_EVENT_PARITY_REBUILD 18
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#define GV_EVENT_PARITY_CHECK 19
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#define GV_EVENT_START_PLEX 20
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#define GV_EVENT_START_VOLUME 21
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#define GV_EVENT_ATTACH_PLEX 22
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#define GV_EVENT_ATTACH_SD 23
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#define GV_EVENT_DETACH_PLEX 24
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#define GV_EVENT_DETACH_SD 25
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#define GV_EVENT_RENAME_VOL 26
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#define GV_EVENT_RENAME_PLEX 27
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#define GV_EVENT_RENAME_SD 28
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#define GV_EVENT_RENAME_DRIVE 29
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#define GV_EVENT_MOVE_SD 30
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#define GV_EVENT_SETUP_OBJECTS 31
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#ifdef _KERNEL
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struct gv_event {
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int type;
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void *arg1;
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void *arg2;
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intmax_t arg3;
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intmax_t arg4;
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TAILQ_ENTRY(gv_event) events;
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};
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/* This struct contains the main vinum config. */
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struct gv_softc {
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/* Linked lists of all objects in our setup. */
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LIST_HEAD(,gv_drive) drives; /* All drives. */
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LIST_HEAD(,gv_plex) plexes; /* All plexes. */
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LIST_HEAD(,gv_sd) subdisks; /* All subdisks. */
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LIST_HEAD(,gv_volume) volumes; /* All volumes. */
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TAILQ_HEAD(,gv_event) equeue; /* Event queue. */
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struct mtx equeue_mtx; /* Event queue lock. */
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struct mtx bqueue_mtx; /* BIO queue lock. */
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struct mtx config_mtx; /* Configuration lock. */
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struct bio_queue_head *bqueue_down; /* BIO queue incoming
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requests. */
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struct bio_queue_head *bqueue_up; /* BIO queue for completed
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requests. */
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struct g_geom *geom; /* Pointer to our VINUM geom. */
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};
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#endif
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/* softc for a drive. */
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struct gv_drive {
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char name[GV_MAXDRIVENAME]; /* The name of this drive. */
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char device[GV_MAXDRIVENAME]; /* Associated device. */
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int state; /* The state of this drive. */
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#define GV_DRIVE_DOWN 0
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#define GV_DRIVE_UP 1
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off_t size; /* Size of this drive. */
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off_t avail; /* Available space. */
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int sdcount; /* Number of subdisks. */
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int flags;
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#define GV_DRIVE_REFERENCED 0x01 /* The drive isn't really existing,
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but was referenced by a subdisk
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during taste. */
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struct gv_hdr *hdr; /* The drive header. */
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struct g_consumer *consumer; /* Consumer attached to this drive. */
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int freelist_entries; /* Count of freelist entries. */
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LIST_HEAD(,gv_freelist) freelist; /* List of freelist entries. */
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LIST_HEAD(,gv_sd) subdisks; /* Subdisks on this drive. */
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LIST_ENTRY(gv_drive) drive; /* Entry in the vinum config. */
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struct gv_softc *vinumconf; /* Pointer to the vinum conf. */
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};
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/* softc for a subdisk. */
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struct gv_sd {
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char name[GV_MAXSDNAME]; /* The name of this subdisk. */
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off_t size; /* The size of this subdisk. */
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off_t drive_offset; /* Offset in the underlying drive. */
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off_t plex_offset; /* Offset in the associated plex. */
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int state; /* The state of this subdisk. */
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#define GV_SD_DOWN 0
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#define GV_SD_STALE 1
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#define GV_SD_INITIALIZING 2
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#define GV_SD_REVIVING 3
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#define GV_SD_UP 4
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off_t initialized; /* Count of initialized bytes. */
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int init_size; /* Initialization read/write size. */
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int init_error; /* Flag error on initialization. */
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int flags;
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#define GV_SD_NEWBORN 0x01 /* Subdisk is created by user. */
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#define GV_SD_TASTED 0x02 /* Subdisk is created during taste. */
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#define GV_SD_CANGOUP 0x04 /* Subdisk can go up immediately. */
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#define GV_SD_GROW 0x08 /* Subdisk is added to striped plex. */
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char drive[GV_MAXDRIVENAME]; /* Name of underlying drive. */
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char plex[GV_MAXPLEXNAME]; /* Name of associated plex. */
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struct gv_drive *drive_sc; /* Pointer to underlying drive. */
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struct gv_plex *plex_sc; /* Pointer to associated plex. */
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LIST_ENTRY(gv_sd) from_drive; /* Subdisk list of underlying drive. */
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LIST_ENTRY(gv_sd) in_plex; /* Subdisk list of associated plex. */
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LIST_ENTRY(gv_sd) sd; /* Entry in the vinum config. */
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struct gv_softc *vinumconf; /* Pointer to the vinum config. */
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};
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/* softc for a plex. */
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struct gv_plex {
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char name[GV_MAXPLEXNAME]; /* The name of the plex. */
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off_t size; /* The size of the plex. */
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int state; /* The plex state. */
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#define GV_PLEX_DOWN 0
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#define GV_PLEX_INITIALIZING 1
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#define GV_PLEX_DEGRADED 2
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#define GV_PLEX_GROWABLE 3
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#define GV_PLEX_UP 4
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int org; /* The plex organisation. */
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#define GV_PLEX_DISORG 0
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#define GV_PLEX_CONCAT 1
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#define GV_PLEX_STRIPED 2
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#define GV_PLEX_RAID5 4
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int stripesize; /* The stripe size of the plex. */
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char volume[GV_MAXVOLNAME]; /* Name of associated volume. */
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struct gv_volume *vol_sc; /* Pointer to associated volume. */
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int sddetached; /* Number of detached subdisks. */
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int sdcount; /* Number of subdisks in this plex. */
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int sddown; /* Number of subdisks that are down. */
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int flags;
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#define GV_PLEX_ADDED 0x01 /* Added to an existing volume. */
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#define GV_PLEX_SYNCING 0x02 /* Plex is syncing from another plex. */
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#define GV_PLEX_THREAD_ACTIVE 0x04 /* Plex has an active RAID5 thread. */
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#define GV_PLEX_THREAD_DIE 0x08 /* Signal the RAID5 thread to die. */
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#define GV_PLEX_THREAD_DEAD 0x10 /* The RAID5 thread has died. */
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#define GV_PLEX_NEWBORN 0x20 /* The plex was just created. */
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#define GV_PLEX_REBUILDING 0x40 /* The plex is rebuilding. */
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#define GV_PLEX_GROWING 0x80 /* The plex is growing. */
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off_t synced; /* Count of synced bytes. */
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TAILQ_HEAD(,gv_raid5_packet) packets; /* RAID5 sub-requests. */
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LIST_HEAD(,gv_sd) subdisks; /* List of attached subdisks. */
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LIST_ENTRY(gv_plex) in_volume; /* Plex list of associated volume. */
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LIST_ENTRY(gv_plex) plex; /* Entry in the vinum config. */
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#ifdef _KERNEL
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struct bio_queue_head *bqueue; /* BIO queue. */
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struct bio_queue_head *wqueue; /* Waiting BIO queue. */
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struct bio_queue_head *rqueue; /* Rebuild waiting BIO queue. */
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#else
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char *bpad, *wpad, *rpad; /* Padding for userland. */
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#endif
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struct gv_softc *vinumconf; /* Pointer to the vinum config. */
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};
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/* softc for a volume. */
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struct gv_volume {
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char name[GV_MAXVOLNAME]; /* The name of the volume. */
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off_t size; /* The size of the volume. */
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int plexcount; /* Number of plexes. */
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int state; /* The state of the volume. */
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#define GV_VOL_DOWN 0
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#define GV_VOL_UP 1
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int flags;
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#define GV_VOL_THREAD_ACTIVE 0x01 /* Volume has an active thread. */
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#define GV_VOL_THREAD_DIE 0x02 /* Signal the thread to die. */
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#define GV_VOL_THREAD_DEAD 0x04 /* The thread has died. */
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#define GV_VOL_NEWBORN 0x08 /* The volume was just created. */
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LIST_HEAD(,gv_plex) plexes; /* List of attached plexes. */
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LIST_ENTRY(gv_volume) volume; /* Entry in vinum config. */
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struct g_provider *provider; /* Provider of this volume. */
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#ifdef _KERNEL
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struct bio_queue_head *wqueue; /* BIO delayed request queue. */
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#else
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char *wpad; /* Padding for userland. */
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#endif
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struct gv_plex *last_read_plex;
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struct gv_softc *vinumconf; /* Pointer to the vinum config. */
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};
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#endif /* !_GEOM_VINUM_VAR_H */
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