2009-11-06 Felix Zielcke <fzielcke@z-51.de>
* disk/dmraid_nvidia.c (grub_dmraid_nv_detect): Set array->name to NULL. * disk/mdraid_linux.c (grub_raid_super_1x): New structure. (WriteMostly1): New macro. Set array->name to NULL for metadata format 0.90. Add support for metadata 1.x. Fix some comments. * disk/raid.c (): Add support for name based RAID arrays. Fix a few comments. * util/getroot.c (grub_util_get_grub_dev): Add support for /dev/md/name style devices.
This commit is contained in:
Felix Zielcke
parent
c926e1d585
commit
c8ec30a0a4
5 changed files with 252 additions and 43 deletions
11
ChangeLog.raid
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11
ChangeLog.raid
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@ -0,0 +1,11 @@
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2009-11-06 Felix Zielcke <fzielcke@z-51.de>
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* disk/dmraid_nvidia.c (grub_dmraid_nv_detect): Set array->name to NULL.
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* disk/mdraid_linux.c (grub_raid_super_1x): New structure.
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(WriteMostly1): New macro.
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Set array->name to NULL for metadata format 0.90. Add support for
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metadata 1.x. Fix some comments.
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* disk/raid.c (): Add support for name based RAID arrays. Fix a
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few comments.
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* util/getroot.c (grub_util_get_grub_dev): Add support for
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/dev/md/name style devices.
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@ -1,7 +1,7 @@
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/* dmraid_nvidia.c - module to handle Nvidia fakeraid. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008 Free Software Foundation, Inc.
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* Copyright (C) 2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -132,6 +132,7 @@ grub_dmraid_nv_detect (grub_disk_t disk, struct grub_raid_array *array)
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"Unsupported RAID level: %d", sb.array.raid_level);
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}
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array->name = NULL;
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array->number = 0;
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array->total_devs = sb.array.total_volumes;
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array->chunk_size = sb.array.stripe_block_size;
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@ -1,7 +1,7 @@
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/* mdraid_linux.c - module to handle linux softraid. */
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/* mdraid_linux.c - module to handle Linux Software RAID. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008 Free Software Foundation, Inc.
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* Copyright (C) 2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -159,32 +159,146 @@ struct grub_raid_super_09
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struct grub_raid_disk_09 this_disk;
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} __attribute__ ((packed));
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/*
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* The version-1 superblock :
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* All numeric fields are little-endian.
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*
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* Total size: 256 bytes plus 2 per device.
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* 1K allows 384 devices.
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*/
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struct grub_raid_super_1x
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{
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/* Constant array information - 128 bytes. */
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grub_uint32_t magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian. */
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grub_uint32_t major_version; /* 1. */
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grub_uint32_t feature_map; /* Bit 0 set if 'bitmap_offset' is meaningful. */
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grub_uint32_t pad0; /* Always set to 0 when writing. */
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grub_uint8_t set_uuid[16]; /* User-space generated. */
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char set_name[32]; /* Set and interpreted by user-space. */
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grub_uint64_t ctime; /* Lo 40 bits are seconds, top 24 are microseconds or 0. */
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grub_uint32_t level; /* -4 (multipath), -1 (linear), 0,1,4,5. */
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grub_uint32_t layout; /* only for raid5 and raid10 currently. */
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grub_uint64_t size; /* Used size of component devices, in 512byte sectors. */
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grub_uint32_t chunksize; /* In 512byte sectors. */
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grub_uint32_t raid_disks;
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grub_uint32_t bitmap_offset; /* Sectors after start of superblock that bitmap starts
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* NOTE: signed, so bitmap can be before superblock
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* only meaningful of feature_map[0] is set.
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*/
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/* These are only valid with feature bit '4'. */
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grub_uint32_t new_level; /* New level we are reshaping to. */
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grub_uint64_t reshape_position; /* Next address in array-space for reshape. */
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grub_uint32_t delta_disks; /* Change in number of raid_disks. */
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grub_uint32_t new_layout; /* New layout. */
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grub_uint32_t new_chunk; /* New chunk size (512byte sectors). */
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grub_uint8_t pad1[128 - 124]; /* Set to 0 when written. */
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/* Constant this-device information - 64 bytes. */
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grub_uint64_t data_offset; /* Sector start of data, often 0. */
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grub_uint64_t data_size; /* Sectors in this device that can be used for data. */
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grub_uint64_t super_offset; /* Sector start of this superblock. */
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grub_uint64_t recovery_offset; /* Sectors before this offset (from data_offset) have been recovered. */
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grub_uint32_t dev_number; /* Permanent identifier of this device - not role in raid. */
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grub_uint32_t cnt_corrected_read; /* Number of read errors that were corrected by re-writing. */
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grub_uint8_t device_uuid[16]; /* User-space setable, ignored by kernel. */
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grub_uint8_t devflags; /* Per-device flags. Only one defined... */
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grub_uint8_t pad2[64 - 57]; /* Set to 0 when writing. */
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/* Array state information - 64 bytes. */
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grub_uint64_t utime; /* 40 bits second, 24 btes microseconds. */
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grub_uint64_t events; /* Incremented when superblock updated. */
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grub_uint64_t resync_offset; /* Data before this offset (from data_offset) known to be in sync. */
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grub_uint32_t sb_csum; /* Checksum upto devs[max_dev]. */
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grub_uint32_t max_dev; /* Size of devs[] array to consider. */
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grub_uint8_t pad3[64 - 32]; /* Set to 0 when writing. */
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/* Device state information. Indexed by dev_number.
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* 2 bytes per device.
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* Note there are no per-device state flags. State information is rolled
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* into the 'roles' value. If a device is spare or faulty, then it doesn't
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* have a meaningful role.
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*/
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grub_uint16_t dev_roles[0]; /* Role in array, or 0xffff for a spare, or 0xfffe for faulty. */
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} __attribute__ ((packed));
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#define WriteMostly1 1 /* Mask for writemostly flag in above devflags. */
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static grub_err_t
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grub_mdraid_detect (grub_disk_t disk, struct grub_raid_array *array)
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{
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grub_disk_addr_t sector;
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grub_uint64_t size;
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grub_uint64_t size, sb_size;
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struct grub_raid_super_09 sb;
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struct grub_raid_super_1x *sb_1x;
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grub_uint32_t *uuid;
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grub_uint8_t minor_version;
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/* The sector where the RAID superblock is stored, if available. */
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/* The sector where the mdraid 0.90 superblock is stored, if available. */
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size = grub_disk_get_size (disk);
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sector = NEW_SIZE_SECTORS (size);
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if (grub_disk_read (disk, sector, 0, SB_BYTES, &sb))
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return grub_errno;
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/* Look whether there is a RAID superblock. */
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if (sb.md_magic != SB_MAGIC)
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/* Look whether there is a mdraid 0.90 superblock. */
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if (sb.md_magic == SB_MAGIC)
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goto superblock_0_90;
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/* Check for an 1.x superblock.
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* It's always aligned to a 4K boundary
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* and depending on the minor version it can be:
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* 0: At least 8K, but less than 12K, from end of device
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* 1: At start of device
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* 2: 4K from start of device.
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*/
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sb_1x = grub_malloc (sizeof (struct grub_raid_super_1x));
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if (!sb_1x)
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return grub_errno;
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for (minor_version = 0; minor_version < 3; ++minor_version)
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{
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switch (minor_version)
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{
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case 0:
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sector = (size - 8 * 2) & ~(4 * 2 - 1);
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break;
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case 1:
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sector = 0;
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break;
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case 2:
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sector = 4 * 2;
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break;
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}
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if (grub_disk_read
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(disk, sector, 0, sizeof (struct grub_raid_super_1x), sb_1x))
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{
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grub_free (sb_1x);
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return grub_errno;
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}
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if (sb_1x->magic == SB_MAGIC)
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goto superblock_1_x;
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}
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/* Neither 0.90 nor 1.x. */
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if (grub_le_to_cpu32 (sb_1x->magic) != SB_MAGIC)
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return grub_error (GRUB_ERR_OUT_OF_RANGE, "not raid");
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/* FIXME: Also support version 1.0. */
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superblock_0_90:
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if (sb.major_version != 0 || sb.minor_version != 90)
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return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"Unsupported RAID version: %d.%d",
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sb.major_version, sb.minor_version);
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/* FIXME: Check the checksum. */
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/* FIXME: Check the checksum. */
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/* Multipath. */
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if ((int) sb.level == -4)
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@ -195,6 +309,7 @@ grub_mdraid_detect (grub_disk_t disk, struct grub_raid_array *array)
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return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"Unsupported RAID level: %d", sb.level);
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array->name = NULL;
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array->number = sb.md_minor;
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array->level = sb.level;
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array->layout = sb.layout;
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@ -205,7 +320,10 @@ grub_mdraid_detect (grub_disk_t disk, struct grub_raid_array *array)
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array->uuid_len = 16;
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array->uuid = grub_malloc (16);
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if (!array->uuid)
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return grub_errno;
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{
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grub_free (sb_1x);
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return grub_errno;
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}
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uuid = (grub_uint32_t *) array->uuid;
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uuid[0] = sb.set_uuid0;
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@ -214,6 +332,63 @@ grub_mdraid_detect (grub_disk_t disk, struct grub_raid_array *array)
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uuid[3] = sb.set_uuid3;
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return 0;
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superblock_1_x:
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if (sb_1x->major_version != 1)
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return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"Unsupported RAID version: %d",
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sb_1x->major_version);
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/* Multipath. */
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if ((int) sb_1x->level == -4)
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sb_1x->level = 1;
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if (sb_1x->level != 0 && sb_1x->level != 1 && sb_1x->level != 4 &&
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sb_1x->level != 5 && sb_1x->level != 6 && sb_1x->level != 10)
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{
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grub_free (sb_1x);
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return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"Unsupported RAID level: %d", sb.level);
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}
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/* 1.x superblocks don't have a fixed size on disk. So we have to
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read it again now that we now the max device count. */
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sb_size = sizeof (struct grub_raid_super_1x) + 2 * grub_le_to_cpu32 (sb_1x->max_dev);
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sb_1x = grub_realloc (sb_1x, sb_size);
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if (! sb_1x)
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return grub_errno;
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if (grub_disk_read (disk, sector, 0, sb_size, sb_1x))
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{
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grub_free (sb_1x);
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return grub_errno;
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}
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array->name = grub_strdup (sb_1x->set_name);
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if (! array->name)
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{
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grub_free (sb_1x);
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return grub_errno;
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}
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array->number = 0;
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array->level = grub_le_to_cpu32 (sb_1x->level);
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array->layout = grub_le_to_cpu32 (sb_1x->layout);
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array->total_devs = grub_le_to_cpu32 (sb_1x->raid_disks);
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array->disk_size = grub_le_to_cpu64 (sb_1x->size) * 2;
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array->chunk_size = grub_le_to_cpu32 (sb_1x->chunksize) >> 9;
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array->index = grub_le_to_cpu32 (sb_1x->dev_number);
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array->uuid_len = 16;
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array->uuid = grub_malloc (16);
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if (!array->uuid)
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{
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grub_free (sb_1x);
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return grub_errno;
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}
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grub_memcpy (array->uuid, sb_1x->set_uuid, 16);
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grub_free (sb_1x);
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return 0;
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}
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static struct grub_raid grub_mdraid_dev = {
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72
disk/raid.c
72
disk/raid.c
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@ -1,7 +1,7 @@
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/* raid.c - module to read RAID arrays. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008 Free Software Foundation, Inc.
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* Copyright (C) 2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -480,7 +480,7 @@ insert_array (grub_disk_t disk, struct grub_raid_array *new_array,
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struct grub_raid_array *array = 0, *p;
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/* See whether the device is part of an array we have already seen a
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device from. */
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device from. */
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for (p = array_list; p != NULL; p = p->next)
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if ((p->uuid_len == new_array->uuid_len) &&
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(! grub_memcmp (p->uuid, new_array->uuid, p->uuid_len)))
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@ -491,7 +491,7 @@ insert_array (grub_disk_t disk, struct grub_raid_array *new_array,
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/* Do some checks before adding the device to the array. */
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/* FIXME: Check whether the update time of the superblocks are
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the same. */
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the same. */
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if (array->total_devs == array->nr_devs)
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/* We found more members of the array than the array
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@ -502,7 +502,7 @@ insert_array (grub_disk_t disk, struct grub_raid_array *new_array,
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if (array->device[new_array->index] != NULL)
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/* We found multiple devices with the same number. Again,
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this shouldn't happen.*/
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this shouldn't happen. */
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grub_dprintf ("raid", "Found two disks with the number %d?!?",
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new_array->number);
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@ -525,47 +525,55 @@ insert_array (grub_disk_t disk, struct grub_raid_array *new_array,
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array->nr_devs = 0;
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grub_memset (&array->device, 0, sizeof (array->device));
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/* Check whether we don't have multiple arrays with the same number. */
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if (array->name)
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goto skip_duplicate_check;
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/* Check whether we don't have multiple arrays with the same number. */
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for (p = array_list; p != NULL; p = p->next)
|
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{
|
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if (p->number == array->number)
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break;
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break;
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}
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|
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if (p)
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{
|
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/* The number is already in use, so we need to find an new number. */
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/* The number is already in use, so we need to find a new one. */
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int i = 0;
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|
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while (1)
|
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{
|
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for (p = array_list; p != NULL; p = p->next)
|
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{
|
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if (p->number == i)
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break;
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}
|
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while (1)
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{
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for (p = array_list; p != NULL; p = p->next)
|
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{
|
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if (p->number == i)
|
||||
break;
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||||
}
|
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|
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if (!p)
|
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{
|
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/* We found an unused number. */
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array->number = i;
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break;
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}
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if (! p)
|
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{
|
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/* We found an unused number. */
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array->number = i;
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break;
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}
|
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i++;
|
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}
|
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}
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|
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array->name = grub_malloc (13);
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i++;
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}
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}
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skip_duplicate_check:
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/* mdraid 1.x superblocks have only a name stored not a number.
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Use it directly as GRUB device. */
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if (! array->name)
|
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{
|
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grub_free (array->uuid);
|
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grub_free (array);
|
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{
|
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array->name = grub_malloc (13);
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if (! array->name)
|
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{
|
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grub_free (array->uuid);
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grub_free (array);
|
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|
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return grub_errno;
|
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}
|
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|
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grub_sprintf (array->name, "md%d", array->number);
|
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return grub_errno;
|
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}
|
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grub_sprintf (array->name, "md%d", array->number);
|
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}
|
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else
|
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grub_sprintf (array->name, "%s", array->name);
|
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|
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grub_dprintf ("raid", "Found array %s (%s)\n", array->name,
|
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scanner_name);
|
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|
|
|
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|
|
@ -498,6 +498,20 @@ grub_util_get_grub_dev (const char *os_dev)
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asprintf (&grub_dev, "md%s", p);
|
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free (p);
|
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}
|
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else if (os_dev[7] == '/')
|
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{
|
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/* mdraid 1.x with a free name. */
|
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char *p , *q;
|
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|
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p = strdup (os_dev + sizeof ("/dev/md/") - 1);
|
||||
|
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q = strchr (p, 'p');
|
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if (q)
|
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*q = ',';
|
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|
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asprintf (&grub_dev, "%s", p);
|
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free (p);
|
||||
}
|
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else
|
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grub_util_error ("Unknown kind of RAID device `%s'", os_dev);
|
||||
|
||||
|
|
|
|||
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Reference in a new issue