189dd63981
Backport patches for supporting intel vroc raid device. Commit 23774f997ea077f2cbe8a32bd8bccdd7f4560cca (devices: detect md ddf and imsm superblocks) Commit 00c9a788cc617e5e40746dee2e17287d61ee5c81 (devices: simplify md superblock checking code) Commit 7880896f0dbe730e7b47aa8040544434813eacc4 (gcc: calc size in compile time) Commit 12667e9897ad54f5723463b4c864c8259ba0be2a (fix check for md raid imsm signature on 4k devices) Commit 6a099707c433f0b3f2644c52f7773751832693a4 (clang: remove unused assignment) Otherwise, create vg on a intel vroc raid will produce below error: /* command begin */ $ pvcreate /dev/md0 $ vgcreate testvg /dev/md0 Cannot use device /dev/md0 with duplicates. /* command end */ Signed-off-by: Xiaole He <hexiaole@kylinos.cn>
160 lines
4.3 KiB
Diff
160 lines
4.3 KiB
Diff
From a957fa33e99bfb7da4eee4a4c0ab95ee61928b73 Mon Sep 17 00:00:00 2001
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From: David Teigland <teigland@redhat.com>
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Date: Thu, 19 Sep 2019 11:33:59 -0500
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Subject: [PATCH 18/22] devices: detect md ddf and imsm superblocks
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---
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lib/device/dev-md.c | 105 +++++++++++++++++++++++++++++++++++++++++++-
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1 file changed, 104 insertions(+), 1 deletion(-)
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diff --git a/lib/device/dev-md.c b/lib/device/dev-md.c
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index 9d0a363..13a3c16 100644
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--- a/lib/device/dev-md.c
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+++ b/lib/device/dev-md.c
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@@ -16,6 +16,7 @@
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#include "lib/misc/lib.h"
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#include "lib/device/dev-type.h"
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#include "lib/mm/xlate.h"
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+#include "lib/misc/crc.h"
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#ifdef UDEV_SYNC_SUPPORT
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#include <libudev.h> /* for MD detection using udev db records */
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#include "lib/device/dev-ext-udev-constants.h"
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@@ -48,6 +49,93 @@ static int _dev_has_md_magic(struct device *dev, uint64_t sb_offset)
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return 0;
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}
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+#define IMSM_SIGNATURE "Intel Raid ISM Cfg Sig. "
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+#define IMSM_SIG_LEN (strlen(IMSM_SIGNATURE))
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+
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+static int _dev_has_imsm_magic(struct device *dev, uint64_t devsize_sectors)
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+{
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+ char imsm_signature[IMSM_SIG_LEN];
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+ uint64_t off = (devsize_sectors * 512) - 1024;
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+
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+ if (!dev_read_bytes(dev, off, IMSM_SIG_LEN, imsm_signature))
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+ return_0;
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+
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+ if (!memcmp(imsm_signature, IMSM_SIGNATURE, IMSM_SIG_LEN))
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+ return 1;
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+
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+ return 0;
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+}
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+
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+#define DDF_MAGIC 0xDE11DE11
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+struct ddf_header {
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+ uint32_t magic;
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+ uint32_t crc;
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+ char guid[24];
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+ char revision[8];
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+ char padding[472];
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+};
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+
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+static int _dev_has_ddf_magic(struct device *dev, uint64_t devsize_sectors)
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+{
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+ struct ddf_header hdr;
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+ uint32_t crc, our_crc;
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+ uint64_t off;
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+ uint64_t devsize_bytes = devsize_sectors * 512;
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+
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+ if (devsize_bytes < 0x30000)
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+ return 0;
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+
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+ /* 512 bytes before the end of device (from libblkid) */
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+ off = ((devsize_bytes / 0x200) - 1) * 0x200;
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+
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+ if (!dev_read_bytes(dev, off, 512, &hdr))
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+ return_0;
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+
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+ if ((hdr.magic == cpu_to_be32(DDF_MAGIC)) ||
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+ (hdr.magic == cpu_to_le32(DDF_MAGIC))) {
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+ crc = hdr.crc;
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+ hdr.crc = 0xffffffff;
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+ our_crc = calc_crc(0, (const uint8_t *)&hdr, 512);
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+
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+ if ((cpu_to_be32(our_crc) == crc) ||
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+ (cpu_to_le32(our_crc) == crc)) {
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+ log_debug_devs("Found md ddf magic at %llu crc %x %s",
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+ (unsigned long long)off, crc, dev_name(dev));
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+ return 1;
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+ } else {
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+ log_debug_devs("Found md ddf magic at %llu wrong crc %x disk %x %s",
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+ (unsigned long long)off, our_crc, crc, dev_name(dev));
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+ return 0;
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+ }
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+ }
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+
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+ /* 128KB before the end of device (from libblkid) */
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+ off = ((devsize_bytes / 0x200) - 257) * 0x200;
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+
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+ if (!dev_read_bytes(dev, off, 512, &hdr))
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+ return_0;
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+
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+ if ((hdr.magic == cpu_to_be32(DDF_MAGIC)) ||
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+ (hdr.magic == cpu_to_le32(DDF_MAGIC))) {
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+ crc = hdr.crc;
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+ hdr.crc = 0xffffffff;
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+ our_crc = calc_crc(0, (const uint8_t *)&hdr, 512);
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+
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+ if ((cpu_to_be32(our_crc) == crc) ||
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+ (cpu_to_le32(our_crc) == crc)) {
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+ log_debug_devs("Found md ddf magic at %llu crc %x %s",
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+ (unsigned long long)off, crc, dev_name(dev));
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+ return 1;
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+ } else {
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+ log_debug_devs("Found md ddf magic at %llu wrong crc %x disk %x %s",
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+ (unsigned long long)off, our_crc, crc, dev_name(dev));
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+ return 0;
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+ }
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+ }
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+
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+ return 0;
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+}
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+
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/*
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* Calculate the position of the superblock.
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* It is always aligned to a 4K boundary and
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@@ -178,8 +266,8 @@ static int _native_dev_is_md_component(struct device *dev, uint64_t *offset_foun
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goto out;
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}
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- /* Check if it is an md component device. */
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/* Version 0.90.0 */
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+ /* superblock at 64KB from end of device */
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sb_offset = MD_NEW_SIZE_SECTORS(size) << SECTOR_SHIFT;
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if (_dev_has_md_magic(dev, sb_offset)) {
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ret = 1;
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@@ -187,8 +275,11 @@ static int _native_dev_is_md_component(struct device *dev, uint64_t *offset_foun
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}
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minor = MD_MINOR_VERSION_MIN;
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+
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/* Version 1, try v1.0 -> v1.2 */
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+
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do {
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+ /* superblock at start or 4K from start */
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sb_offset = _v1_sb_offset(size, minor);
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if (_dev_has_md_magic(dev, sb_offset)) {
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ret = 1;
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@@ -196,6 +287,18 @@ static int _native_dev_is_md_component(struct device *dev, uint64_t *offset_foun
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}
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} while (++minor <= MD_MINOR_VERSION_MAX);
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+ /* superblock 1K from end of device */
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+ if (_dev_has_imsm_magic(dev, size)) {
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+ ret = 1;
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+ goto out;
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+ }
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+
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+ /* superblock 512 bytes from end, or 128KB from end */
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+ if (_dev_has_ddf_magic(dev, size)) {
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+ ret = 1;
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+ goto out;
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+ }
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+
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ret = 0;
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out:
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if (ret && offset_found)
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--
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2.27.0
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