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Add to GEOM RAID class module for reading non-degraded RAID5 volumes and

Browse source 
some environment to differentiate 4 possible RAID5 on-disk layouts.

Tested with Intel and AMD RAID BIOSes.

MFC after:	2 weeks
This commit is contained in:
Alexander Motin 2012-04-19 12:30:12 +00:00
parent a47f39da1f
commit fc1de96060
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=234458
11 changed files with 473 additions and 32 deletions
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5
sbin/geom/class/raid/graid.8
View file

@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd October 26, 2011
.Dd April 19, 2012
.Dt GRAID 8
.Os
.Sh NAME
@ -242,7 +242,8 @@ own risk: RAID1 (3+ disks), RAID10 (6+ disks).
The GEOM RAID class follows a modular design, allowing different RAID levels
to be used.
Support for the following RAID levels is currently implemented: RAID0, RAID1,
RAID1E, RAID10, SINGLE, CONCAT.
RAID1E, RAID5, RAID10, SINGLE, CONCAT.
RAID5 support is read-only and only for volumes in optimal state.
.Sh RAID LEVEL MIGRATION
The GEOM RAID class has no support for RAID level migration, allowed by some
metadata formats.

1
sys/conf/files
View file

@ -2405,6 +2405,7 @@ geom/raid/tr_concat.c optional geom_raid
geom/raid/tr_raid0.c optional geom_raid
geom/raid/tr_raid1.c optional geom_raid
geom/raid/tr_raid1e.c optional geom_raid
geom/raid/tr_raid5.c optional geom_raid
geom/raid3/g_raid3.c optional geom_raid3
geom/raid3/g_raid3_ctl.c optional geom_raid3
geom/shsec/g_shsec.c optional geom_shsec

23
sys/geom/raid/g_raid.c
View file

@ -281,6 +281,14 @@ g_raid_volume_level2str(int level, int qual)
case G_RAID_VOLUME_RL_RAID4:
return ("RAID4");
case G_RAID_VOLUME_RL_RAID5:
if (qual == G_RAID_VOLUME_RLQ_R5RA)
return ("RAID5RA");
if (qual == G_RAID_VOLUME_RLQ_R5RS)
return ("RAID5RS");
if (qual == G_RAID_VOLUME_RLQ_R5LA)
return ("RAID5LA");
if (qual == G_RAID_VOLUME_RLQ_R5LS)
return ("RAID5LS");
return ("RAID5");
case G_RAID_VOLUME_RL_RAID6:
return ("RAID6");
@ -313,9 +321,20 @@ g_raid_volume_str2level(const char *str, int *level, int *qual)
*level = G_RAID_VOLUME_RL_RAID3;
else if (strcasecmp(str, "RAID4") == 0)
*level = G_RAID_VOLUME_RL_RAID4;
else if (strcasecmp(str, "RAID5") == 0)
else if (strcasecmp(str, "RAID5RA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5;
else if (strcasecmp(str, "RAID6") == 0)
*qual = G_RAID_VOLUME_RLQ_R5RA;
} else if (strcasecmp(str, "RAID5RS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5;
*qual = G_RAID_VOLUME_RLQ_R5RS;
} else if (strcasecmp(str, "RAID5") == 0 ||
strcasecmp(str, "RAID5LA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5;
*qual = G_RAID_VOLUME_RLQ_R5LA;
} else if (strcasecmp(str, "RAID5LS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5;
*qual = G_RAID_VOLUME_RLQ_R5LS;
} else if (strcasecmp(str, "RAID6") == 0)
*level = G_RAID_VOLUME_RL_RAID6;
else if (strcasecmp(str, "RAID10") == 0 ||
strcasecmp(str, "RAID1E") == 0)

4
sys/geom/raid/g_raid.h
View file

@ -227,6 +227,10 @@ struct g_raid_subdisk {
#define G_RAID_VOLUME_RL_UNKNOWN 0xff
#define G_RAID_VOLUME_RLQ_NONE 0x00
#define G_RAID_VOLUME_RLQ_R5RA 0x00
#define G_RAID_VOLUME_RLQ_R5RS 0x01
#define G_RAID_VOLUME_RLQ_R5LA 0x02
#define G_RAID_VOLUME_RLQ_R5LS 0x03
#define G_RAID_VOLUME_RLQ_UNKNOWN 0xff
struct g_raid_volume;

41
sys/geom/raid/md_intel.c
View file

@ -682,11 +682,13 @@ g_raid_md_intel_supported(int level, int qual, int disks, int force)
return (0);
if (!force && disks > 6)
return (0);
if (qual != G_RAID_VOLUME_RLQ_R5LA)
return (0);
break;
default:
return (0);
}
if (qual != G_RAID_VOLUME_RLQ_NONE)
if (level != G_RAID_VOLUME_RL_RAID5 && qual != G_RAID_VOLUME_RLQ_NONE)
return (0);
return (1);
}
@ -1029,6 +1031,7 @@ g_raid_md_intel_start(struct g_raid_softc *sc)
mmap = intel_get_map(mvol, 0);
vol = g_raid_create_volume(sc, mvol->name, -1);
vol->v_md_data = (void *)(intptr_t)i;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
if (mmap->type == INTEL_T_RAID0)
vol->v_raid_level = G_RAID_VOLUME_RL_RAID0;
else if (mmap->type == INTEL_T_RAID1 &&
@ -1045,11 +1048,11 @@ g_raid_md_intel_start(struct g_raid_softc *sc)
vol->v_raid_level = G_RAID_VOLUME_RL_RAID1;
else
vol->v_raid_level = G_RAID_VOLUME_RL_RAID1E;
} else if (mmap->type == INTEL_T_RAID5)
} else if (mmap->type == INTEL_T_RAID5) {
vol->v_raid_level = G_RAID_VOLUME_RL_RAID5;
else
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_R5LA;
} else
vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_strip_size = (u_int)mmap->strip_sectors * 512; //ZZZ
vol->v_disks_count = mmap->total_disks;
vol->v_mediasize = (off_t)mvol->total_sectors * 512; //ZZZ
@ -1485,6 +1488,8 @@ g_raid_md_ctl_intel(struct g_raid_md_object *md,
gctl_error(req, "No RAID level.");
return (-3);
}
if (strcasecmp(levelname, "RAID5") == 0)
levelname = "RAID5LA";
if (g_raid_volume_str2level(levelname, &level, &qual)) {
gctl_error(req, "Unknown RAID level '%s'.", levelname);
return (-4);
@ -1631,7 +1636,7 @@ g_raid_md_ctl_intel(struct g_raid_md_object *md,
vol = g_raid_create_volume(sc, volname, -1);
vol->v_md_data = (void *)(intptr_t)0;
vol->v_raid_level = level;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_raid_level_qualifier = qual;
vol->v_strip_size = strip;
vol->v_disks_count = numdisks;
if (level == G_RAID_VOLUME_RL_RAID0)
@ -1658,8 +1663,12 @@ g_raid_md_ctl_intel(struct g_raid_md_object *md,
if (sd->sd_disk->d_consumer != NULL) {
g_raid_change_disk_state(disk,
G_RAID_DISK_S_ACTIVE);
g_raid_change_subdisk_state(sd,
G_RAID_SUBDISK_S_ACTIVE);
if (level == G_RAID_VOLUME_RL_RAID5)
g_raid_change_subdisk_state(sd,
G_RAID_SUBDISK_S_UNINITIALIZED);
else
g_raid_change_subdisk_state(sd,
G_RAID_SUBDISK_S_ACTIVE);
g_raid_event_send(sd, G_RAID_SUBDISK_E_NEW,
G_RAID_EVENT_SUBDISK);
} else {
@ -1694,6 +1703,8 @@ g_raid_md_ctl_intel(struct g_raid_md_object *md,
gctl_error(req, "No RAID level.");
return (-3);
}
if (strcasecmp(levelname, "RAID5") == 0)
levelname = "RAID5LA";
if (g_raid_volume_str2level(levelname, &level, &qual)) {
gctl_error(req, "Unknown RAID level '%s'.", levelname);
return (-4);
@ -1818,7 +1829,7 @@ g_raid_md_ctl_intel(struct g_raid_md_object *md,
vol = g_raid_create_volume(sc, volname, -1);
vol->v_md_data = (void *)(intptr_t)i;
vol->v_raid_level = level;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_raid_level_qualifier = qual;
vol->v_strip_size = strip;
vol->v_disks_count = numdisks;
if (level == G_RAID_VOLUME_RL_RAID0)
@ -1843,8 +1854,12 @@ g_raid_md_ctl_intel(struct g_raid_md_object *md,
sd->sd_size = size;
TAILQ_INSERT_TAIL(&disk->d_subdisks, sd, sd_next);
if (disk->d_state == G_RAID_DISK_S_ACTIVE) {
g_raid_change_subdisk_state(sd,
G_RAID_SUBDISK_S_ACTIVE);
if (level == G_RAID_VOLUME_RL_RAID5)
g_raid_change_subdisk_state(sd,
G_RAID_SUBDISK_S_UNINITIALIZED);
else
g_raid_change_subdisk_state(sd,
G_RAID_SUBDISK_S_ACTIVE);
g_raid_event_send(sd, G_RAID_SUBDISK_E_NEW,
G_RAID_EVENT_SUBDISK);
}
@ -2245,6 +2260,9 @@ g_raid_md_write_intel(struct g_raid_md_object *md, struct g_raid_volume *tvol,
mmap0->status = INTEL_S_FAILURE;
else if (vol->v_state == G_RAID_VOLUME_S_DEGRADED)
mmap0->status = INTEL_S_DEGRADED;
else if (g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_UNINITIALIZED)
== g_raid_nsubdisks(vol, -1))
mmap0->status = INTEL_S_UNINITIALIZED;
else
mmap0->status = INTEL_S_READY;
if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID0)
@ -2288,7 +2306,8 @@ g_raid_md_write_intel(struct g_raid_md_object *md, struct g_raid_volume *tvol,
sd->sd_state == G_RAID_SUBDISK_S_RESYNC) {
mmap1->disk_idx[sdi] |= INTEL_DI_RBLD;
} else if (sd->sd_state != G_RAID_SUBDISK_S_ACTIVE &&
sd->sd_state != G_RAID_SUBDISK_S_STALE) {
sd->sd_state != G_RAID_SUBDISK_S_STALE &&
sd->sd_state != G_RAID_SUBDISK_S_UNINITIALIZED) {
mmap0->disk_idx[sdi] |= INTEL_DI_RBLD;
if (mvol->migr_state)
mmap1->disk_idx[sdi] |= INTEL_DI_RBLD;

11
sys/geom/raid/md_jmicron.c
View file

@ -400,13 +400,15 @@ g_raid_md_jmicron_supported(int level, int qual, int disks, int force)
case G_RAID_VOLUME_RL_RAID5:
if (disks < 3)
return (0);
if (qual != G_RAID_VOLUME_RLQ_R5LA)
return (0);
if (!force)
return (0);
break;
default:
return (0);
}
if (qual != G_RAID_VOLUME_RLQ_NONE)
if (level != G_RAID_VOLUME_RL_RAID5 && qual != G_RAID_VOLUME_RLQ_NONE)
return (0);
return (1);
}
@ -657,6 +659,7 @@ g_raid_md_jmicron_start(struct g_raid_softc *sc)
vol = g_raid_create_volume(sc, buf, -1);
size = ((off_t)meta->disk_sectors_high << 16) + meta->disk_sectors_low;
size *= 512; //ZZZ
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
if (meta->type == JMICRON_T_RAID0) {
vol->v_raid_level = G_RAID_VOLUME_RL_RAID0;
vol->v_mediasize = size * mdi->mdio_total_disks;
@ -674,12 +677,12 @@ g_raid_md_jmicron_start(struct g_raid_softc *sc)
vol->v_mediasize = 0;
} else if (meta->type == JMICRON_T_RAID5) {
vol->v_raid_level = G_RAID_VOLUME_RL_RAID5;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_R5LA;
vol->v_mediasize = size * (mdi->mdio_total_disks - 1);
} else {
vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN;
vol->v_mediasize = 0;
}
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_strip_size = 1024 << meta->stripe_shift; //ZZZ
vol->v_disks_count = mdi->mdio_total_disks;
vol->v_sectorsize = 512; //ZZZ
@ -1057,6 +1060,8 @@ g_raid_md_ctl_jmicron(struct g_raid_md_object *md,
gctl_error(req, "No RAID level.");
return (-3);
}
if (strcasecmp(levelname, "RAID5") == 0)
levelname = "RAID5LA";
if (g_raid_volume_str2level(levelname, &level, &qual)) {
gctl_error(req, "Unknown RAID level '%s'.", levelname);
return (-4);
@ -1192,7 +1197,7 @@ g_raid_md_ctl_jmicron(struct g_raid_md_object *md,
vol = g_raid_create_volume(sc, volname, -1);
vol->v_md_data = (void *)(intptr_t)0;
vol->v_raid_level = level;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_raid_level_qualifier = qual;
vol->v_strip_size = strip;
vol->v_disks_count = numdisks;
if (level == G_RAID_VOLUME_RL_RAID0 ||

16
sys/geom/raid/md_nvidia.c
View file

@ -407,11 +407,14 @@ g_raid_md_nvidia_supported(int level, int qual, int disks, int force)
case G_RAID_VOLUME_RL_RAID5:
if (disks < 3)
return (0);
if (qual != G_RAID_VOLUME_RLQ_R5LA &&
qual != G_RAID_VOLUME_RLQ_R5LS)
return (0);
break;
default:
return (0);
}
if (qual != G_RAID_VOLUME_RLQ_NONE)
if (level != G_RAID_VOLUME_RL_RAID5 && qual != G_RAID_VOLUME_RLQ_NONE)
return (0);
return (1);
}
@ -679,10 +682,11 @@ g_raid_md_nvidia_start(struct g_raid_softc *sc)
size = 0;
} else if (meta->type == NVIDIA_T_RAID5) {
vol->v_raid_level = G_RAID_VOLUME_RL_RAID5;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_R5LA;
size = vol->v_mediasize / (mdi->mdio_total_disks - 1);
} else if (meta->type == NVIDIA_T_RAID5_SYM) {
vol->v_raid_level = G_RAID_VOLUME_RL_RAID5;
// vol->v_raid_level_qualifier = 0x03;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_R5LS;
size = vol->v_mediasize / (mdi->mdio_total_disks - 1);
} else {
vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN;
@ -1059,6 +1063,8 @@ g_raid_md_ctl_nvidia(struct g_raid_md_object *md,
gctl_error(req, "No RAID level.");
return (-3);
}
if (strcasecmp(levelname, "RAID5") == 0)
levelname = "RAID5LS";
if (g_raid_volume_str2level(levelname, &level, &qual)) {
gctl_error(req, "Unknown RAID level '%s'.", levelname);
return (-4);
@ -1206,7 +1212,7 @@ g_raid_md_ctl_nvidia(struct g_raid_md_object *md,
vol = g_raid_create_volume(sc, volname, -1);
vol->v_md_data = (void *)(intptr_t)0;
vol->v_raid_level = level;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_raid_level_qualifier = qual;
vol->v_strip_size = strip;
vol->v_disks_count = numdisks;
vol->v_mediasize = volsize;
@ -1454,8 +1460,8 @@ g_raid_md_write_nvidia(struct g_raid_md_object *md, struct g_raid_volume *tvol,
else if (vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT ||
vol->v_raid_level == G_RAID_VOLUME_RL_SINGLE)
meta->type = NVIDIA_T_CONCAT;
// else if (vol->v_raid_level_qualifier == 0)
// meta->type = NVIDIA_T_RAID5;
else if (vol->v_raid_level_qualifier == G_RAID_VOLUME_RLQ_R5LA)
meta->type = NVIDIA_T_RAID5;
else
meta->type = NVIDIA_T_RAID5_SYM;
meta->strip_sectors = vol->v_strip_size / vol->v_sectorsize;

15
sys/geom/raid/md_promise.c
View file

@ -595,11 +595,13 @@ g_raid_md_promise_supported(int level, int qual, int disks, int force)
case G_RAID_VOLUME_RL_RAID5:
if (disks < 3)
return (0);
if (qual != G_RAID_VOLUME_RLQ_R5LA)
return (0);
break;
default:
return (0);
}
if (qual != G_RAID_VOLUME_RLQ_NONE)
if (level != G_RAID_VOLUME_RL_RAID5 && qual != G_RAID_VOLUME_RLQ_NONE)
return (0);
return (1);
}
@ -848,6 +850,7 @@ g_raid_md_promise_start(struct g_raid_volume *vol)
pv = vol->v_md_data;
meta = pv->pv_meta;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
if (meta->type == PROMISE_T_RAID0)
vol->v_raid_level = G_RAID_VOLUME_RL_RAID0;
else if (meta->type == PROMISE_T_RAID1) {
@ -857,15 +860,15 @@ g_raid_md_promise_start(struct g_raid_volume *vol)
vol->v_raid_level = G_RAID_VOLUME_RL_RAID1E;
} else if (meta->type == PROMISE_T_RAID3)
vol->v_raid_level = G_RAID_VOLUME_RL_RAID3;
else if (meta->type == PROMISE_T_RAID5)
else if (meta->type == PROMISE_T_RAID5) {
vol->v_raid_level = G_RAID_VOLUME_RL_RAID5;
else if (meta->type == PROMISE_T_SPAN)
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_R5LA;
} else if (meta->type == PROMISE_T_SPAN)
vol->v_raid_level = G_RAID_VOLUME_RL_CONCAT;
else if (meta->type == PROMISE_T_JBOD)
vol->v_raid_level = G_RAID_VOLUME_RL_SINGLE;
else
vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_strip_size = 512 << meta->stripe_shift; //ZZZ
vol->v_disks_count = meta->total_disks;
vol->v_mediasize = (off_t)meta->total_sectors * 512; //ZZZ
@ -1241,6 +1244,8 @@ g_raid_md_ctl_promise(struct g_raid_md_object *md,
gctl_error(req, "No RAID level.");
return (-3);
}
if (strcasecmp(levelname, "RAID5") == 0)
levelname = "RAID5LA";
if (g_raid_volume_str2level(levelname, &level, &qual)) {
gctl_error(req, "Unknown RAID level '%s'.", levelname);
return (-4);
@ -1415,7 +1420,7 @@ g_raid_md_ctl_promise(struct g_raid_md_object *md,
vol = g_raid_create_volume(sc, volname, -1);
vol->v_md_data = pv;
vol->v_raid_level = level;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_raid_level_qualifier = qual;
vol->v_strip_size = strip;
vol->v_disks_count = numdisks;
if (level == G_RAID_VOLUME_RL_RAID0 ||

11
sys/geom/raid/md_sii.c
View file

@ -456,11 +456,13 @@ g_raid_md_sii_supported(int level, int qual, int disks, int force)
case G_RAID_VOLUME_RL_RAID5:
if (disks < 3)
return (0);
if (qual != G_RAID_VOLUME_RLQ_R5LS)
return (0);
break;
default:
return (0);
}
if (qual != G_RAID_VOLUME_RLQ_NONE)
if (level != G_RAID_VOLUME_RL_RAID5 && qual != G_RAID_VOLUME_RLQ_NONE)
return (0);
return (1);
}
@ -719,6 +721,7 @@ g_raid_md_sii_start(struct g_raid_softc *sc)
sii_meta_get_name(meta, buf);
vol = g_raid_create_volume(sc, buf, -1);
vol->v_mediasize = (off_t)meta->total_sectors * 512;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
if (meta->type == SII_T_RAID0) {
vol->v_raid_level = G_RAID_VOLUME_RL_RAID0;
size = vol->v_mediasize / mdi->mdio_total_disks;
@ -736,6 +739,7 @@ g_raid_md_sii_start(struct g_raid_softc *sc)
size = 0;
} else if (meta->type == SII_T_RAID5) {
vol->v_raid_level = G_RAID_VOLUME_RL_RAID5;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_R5LS;
size = vol->v_mediasize / (mdi->mdio_total_disks - 1);
} else if (meta->type == SII_T_JBOD) {
vol->v_raid_level = G_RAID_VOLUME_RL_SINGLE;
@ -744,7 +748,6 @@ g_raid_md_sii_start(struct g_raid_softc *sc)
vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN;
size = 0;
}
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_strip_size = meta->strip_sectors * 512; //ZZZ
vol->v_disks_count = mdi->mdio_total_disks;
vol->v_sectorsize = 512; //ZZZ
@ -1144,6 +1147,8 @@ g_raid_md_ctl_sii(struct g_raid_md_object *md,
gctl_error(req, "No RAID level.");
return (-3);
}
if (strcasecmp(levelname, "RAID5") == 0)
levelname = "RAID5LS";
if (g_raid_volume_str2level(levelname, &level, &qual)) {
gctl_error(req, "Unknown RAID level '%s'.", levelname);
return (-4);
@ -1278,7 +1283,7 @@ g_raid_md_ctl_sii(struct g_raid_md_object *md,
vol = g_raid_create_volume(sc, volname, -1);
vol->v_md_data = (void *)(intptr_t)0;
vol->v_raid_level = level;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_NONE;
vol->v_raid_level_qualifier = qual;
vol->v_strip_size = strip;
vol->v_disks_count = numdisks;
if (level == G_RAID_VOLUME_RL_RAID0 ||

376
sys/geom/raid/tr_raid5.c Normal file
View file

@ -0,0 +1,376 @@
/*-
* Copyright (c) 2012 Alexander Motin <mav@FreeBSD.org>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``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 AUTHORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bio.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/kobj.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <geom/geom.h>
#include "geom/raid/g_raid.h"
#include "g_raid_tr_if.h"
SYSCTL_DECL(_kern_geom_raid);
static MALLOC_DEFINE(M_TR_RAID5, "tr_raid5_data", "GEOM_RAID RAID5 data");
#define TR_RAID5_NONE 0
#define TR_RAID5_REBUILD 1
#define TR_RAID5_RESYNC 2
#define TR_RAID5_F_DOING_SOME 0x1
#define TR_RAID5_F_LOCKED 0x2
#define TR_RAID5_F_ABORT 0x4
struct g_raid_tr_raid5_object {
struct g_raid_tr_object trso_base;
int trso_starting;
int trso_stopping;
int trso_type;
int trso_recover_slabs; /* slabs before rest */
int trso_fair_io;
int trso_meta_update;
int trso_flags;
struct g_raid_subdisk *trso_failed_sd; /* like per volume */
void *trso_buffer; /* Buffer space */
struct bio trso_bio;
};
static g_raid_tr_taste_t g_raid_tr_taste_raid5;
static g_raid_tr_event_t g_raid_tr_event_raid5;
static g_raid_tr_start_t g_raid_tr_start_raid5;
static g_raid_tr_stop_t g_raid_tr_stop_raid5;
static g_raid_tr_iostart_t g_raid_tr_iostart_raid5;
static g_raid_tr_iodone_t g_raid_tr_iodone_raid5;
static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_raid5;
static g_raid_tr_locked_t g_raid_tr_locked_raid5;
static g_raid_tr_free_t g_raid_tr_free_raid5;
static kobj_method_t g_raid_tr_raid5_methods[] = {
KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_raid5),
KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_raid5),
KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_raid5),
KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_raid5),
KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_raid5),
KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_raid5),
KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_raid5),
KOBJMETHOD(g_raid_tr_locked, g_raid_tr_locked_raid5),
KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_raid5),
{ 0, 0 }
};
static struct g_raid_tr_class g_raid_tr_raid5_class = {
"RAID5",
g_raid_tr_raid5_methods,
sizeof(struct g_raid_tr_raid5_object),
.trc_priority = 100
};
static int
g_raid_tr_taste_raid5(struct g_raid_tr_object *tr, struct g_raid_volume *vol)
{
struct g_raid_tr_raid5_object *trs;
u_int qual;
trs = (struct g_raid_tr_raid5_object *)tr;
qual = tr->tro_volume->v_raid_level_qualifier;
if (tr->tro_volume->v_raid_level == G_RAID_VOLUME_RL_RAID5 &&
qual >= 0 && qual <= 3) {
/* RAID5 */
} else
return (G_RAID_TR_TASTE_FAIL);
trs->trso_starting = 1;
return (G_RAID_TR_TASTE_SUCCEED);
}
static int
g_raid_tr_update_state_raid5(struct g_raid_volume *vol,
struct g_raid_subdisk *sd)
{
struct g_raid_tr_raid5_object *trs;
struct g_raid_softc *sc;
u_int s;
int na, ns, nu;
sc = vol->v_softc;
trs = (struct g_raid_tr_raid5_object *)vol->v_tr;
if (trs->trso_stopping &&
(trs->trso_flags & TR_RAID5_F_DOING_SOME) == 0)
s = G_RAID_VOLUME_S_STOPPED;
else if (trs->trso_starting)
s = G_RAID_VOLUME_S_STARTING;
else {
na = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE);
ns = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_STALE) +
g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_RESYNC);
nu = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_UNINITIALIZED);
if (na == vol->v_disks_count)
s = G_RAID_VOLUME_S_OPTIMAL;
else if (na + ns == vol->v_disks_count ||
na + ns + nu == vol->v_disks_count /* XXX: Temporary. */)
s = G_RAID_VOLUME_S_SUBOPTIMAL;
else if (na == vol->v_disks_count - 1 ||
na + ns + nu == vol->v_disks_count)
s = G_RAID_VOLUME_S_DEGRADED;
else
s = G_RAID_VOLUME_S_BROKEN;
}
if (s != vol->v_state) {
g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ?
G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN,
G_RAID_EVENT_VOLUME);
g_raid_change_volume_state(vol, s);
if (!trs->trso_starting && !trs->trso_stopping)
g_raid_write_metadata(sc, vol, NULL, NULL);
}
return (0);
}
static int
g_raid_tr_event_raid5(struct g_raid_tr_object *tr,
struct g_raid_subdisk *sd, u_int event)
{
g_raid_tr_update_state_raid5(tr->tro_volume, sd);
return (0);
}
static int
g_raid_tr_start_raid5(struct g_raid_tr_object *tr)
{
struct g_raid_tr_raid5_object *trs;
struct g_raid_volume *vol;
trs = (struct g_raid_tr_raid5_object *)tr;
vol = tr->tro_volume;
trs->trso_starting = 0;
g_raid_tr_update_state_raid5(vol, NULL);
return (0);
}
static int
g_raid_tr_stop_raid5(struct g_raid_tr_object *tr)
{
struct g_raid_tr_raid5_object *trs;
struct g_raid_volume *vol;
trs = (struct g_raid_tr_raid5_object *)tr;
vol = tr->tro_volume;
trs->trso_starting = 0;
trs->trso_stopping = 1;
g_raid_tr_update_state_raid5(vol, NULL);
return (0);
}
static void
g_raid_tr_iostart_raid5_read(struct g_raid_tr_object *tr, struct bio *bp)
{
struct g_raid_volume *vol;
struct g_raid_subdisk *sd;
struct bio_queue_head queue;
struct bio *cbp;
char *addr;
off_t offset, start, length, nstripe, remain;
int no, pno;
u_int strip_size, qual;
vol = tr->tro_volume;
addr = bp->bio_data;
strip_size = vol->v_strip_size;
qual = tr->tro_volume->v_raid_level_qualifier;
/* Stripe number. */
nstripe = bp->bio_offset / strip_size;
/* Start position in stripe. */
start = bp->bio_offset % strip_size;
/* Parity disk number. */
pno = nstripe / (vol->v_disks_count - 1) % vol->v_disks_count;
if (qual >= 2)
pno = (vol->v_disks_count - 1) - pno;
/* Disk number. */
no = nstripe % (vol->v_disks_count - 1);
if (qual & 1) {
no = (pno + no + 1) % vol->v_disks_count;
} else if (no >= pno)
no++;
/* Stripe start position in disk. */
offset = (nstripe / (vol->v_disks_count - 1)) * strip_size;
/* Length of data to operate. */
remain = bp->bio_length;
bioq_init(&queue);
do {
length = MIN(strip_size - start, remain);
cbp = g_clone_bio(bp);
if (cbp == NULL)
goto failure;
cbp->bio_offset = offset + start;
cbp->bio_data = addr;
cbp->bio_length = length;
cbp->bio_caller1 = &vol->v_subdisks[no];
bioq_insert_tail(&queue, cbp);
no++;
if (qual & 1) {
no %= vol->v_disks_count;
if (no == pno) {
if (qual < 2) {
pno = (pno + 1) % vol->v_disks_count;
no = (no + 2) % vol->v_disks_count;
} else if (pno == 0)
pno = vol->v_disks_count - 1;
else
pno--;
offset += strip_size;
}
} else {
if (no == pno)
no++;
if (no >= vol->v_disks_count) {
no %= vol->v_disks_count;
if (qual < 2)
pno = (pno + 1) % vol->v_disks_count;
else if (pno == 0)
pno = vol->v_disks_count - 1;
else
pno--;
offset += strip_size;
}
if (no == pno)
no++;
}
remain -= length;
addr += length;
start = 0;
} while (remain > 0);
for (cbp = bioq_first(&queue); cbp != NULL;
cbp = bioq_first(&queue)) {
bioq_remove(&queue, cbp);
sd = cbp->bio_caller1;
cbp->bio_caller1 = NULL;
g_raid_subdisk_iostart(sd, cbp);
}
return;
failure:
for (cbp = bioq_first(&queue); cbp != NULL;
cbp = bioq_first(&queue)) {
bioq_remove(&queue, cbp);
g_destroy_bio(cbp);
}
if (bp->bio_error == 0)
bp->bio_error = ENOMEM;
g_raid_iodone(bp, bp->bio_error);
}
static void
g_raid_tr_iostart_raid5(struct g_raid_tr_object *tr, struct bio *bp)
{
struct g_raid_volume *vol;
struct g_raid_tr_raid5_object *trs;
vol = tr->tro_volume;
trs = (struct g_raid_tr_raid5_object *)tr;
if (vol->v_state < G_RAID_VOLUME_S_SUBOPTIMAL) {
g_raid_iodone(bp, EIO);
return;
}
switch (bp->bio_cmd) {
case BIO_READ:
g_raid_tr_iostart_raid5_read(tr, bp);
break;
case BIO_WRITE:
case BIO_DELETE:
case BIO_FLUSH:
g_raid_iodone(bp, ENODEV);
break;
default:
KASSERT(1 == 0, ("Invalid command here: %u (volume=%s)",
bp->bio_cmd, vol->v_name));
break;
}
}
static void
g_raid_tr_iodone_raid5(struct g_raid_tr_object *tr,
struct g_raid_subdisk *sd, struct bio *bp)
{
struct bio *pbp;
int error;
pbp = bp->bio_parent;
pbp->bio_inbed++;
error = bp->bio_error;
g_destroy_bio(bp);
if (pbp->bio_children == pbp->bio_inbed) {
pbp->bio_completed = pbp->bio_length;
g_raid_iodone(pbp, error);
}
}
static int
g_raid_tr_kerneldump_raid5(struct g_raid_tr_object *tr,
void *virtual, vm_offset_t physical, off_t offset, size_t length)
{
return (ENODEV);
}
static int
g_raid_tr_locked_raid5(struct g_raid_tr_object *tr, void *argp)
{
struct bio *bp;
struct g_raid_subdisk *sd;
bp = (struct bio *)argp;
sd = (struct g_raid_subdisk *)bp->bio_caller1;
g_raid_subdisk_iostart(sd, bp);
return (0);
}
static int
g_raid_tr_free_raid5(struct g_raid_tr_object *tr)
{
struct g_raid_tr_raid5_object *trs;
trs = (struct g_raid_tr_raid5_object *)tr;
if (trs->trso_buffer != NULL) {
free(trs->trso_buffer, M_TR_RAID5);
trs->trso_buffer = NULL;
}
return (0);
}
G_RAID_TR_DECLARE(g_raid_tr_raid5);

2
sys/modules/geom/geom_raid/Makefile
View file

@ -11,7 +11,7 @@ SRCS+= g_raid_tr_if.h g_raid_tr_if.c
SRCS+= md_intel.c md_jmicron.c md_nvidia.c md_promise.c md_sii.c
SRCS+= tr_concat.c tr_raid0.c tr_raid1.c tr_raid1e.c
SRCS+= tr_concat.c tr_raid0.c tr_raid1.c tr_raid1e.c tr_raid5.c
MFILES= kern/bus_if.m kern/device_if.m
MFILES+= geom/raid/g_raid_md_if.m geom/raid/g_raid_tr_if.m