forked from pool/bcache-tools
94 lines
2.3 KiB
Diff
94 lines
2.3 KiB
Diff
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From e46282f62364379a6c79b88afd5ed3b78c9781b7 Mon Sep 17 00:00:00 2001
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From: Coly Li <colyli@suse.de>
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Date: Sun, 16 Aug 2020 21:45:28 +0800
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Subject: [PATCH 04/17] bcache-tools: add struct cache_sb_disk into bcache.h
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Git-commit: e46282f62364379a6c79b88afd5ed3b78c9781b7
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Patch-mainline: bcache-tools-1.1
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References: jsc#SLE-9807
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This is to sync the data structure from bcache kernel code uapi header.
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The new added struct cache_sb_disk is used to define the on-disk format
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bcache super block. Later struct cache_sb will be used for the in-memory
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format bcache super block.
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Signed-off-by: Coly Li <colyli@suse.de>
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---
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bcache.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 54 insertions(+)
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diff --git a/bcache.h b/bcache.h
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index c83f838..82fe580 100644
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--- a/bcache.h
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+++ b/bcache.h
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@@ -7,6 +7,8 @@
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#ifndef _BCACHE_H
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#define _BCACHE_H
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+#include <linux/types.h>
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+
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#define BITMASK(name, type, field, offset, size) \
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static inline uint64_t name(const type *k) \
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{ return (k->field >> offset) & ~(((uint64_t) ~0) << size); } \
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@@ -40,6 +42,58 @@ static const char bcache_magic[] = {
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#define BDEV_DATA_START_DEFAULT 16 /* sectors */
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#define SB_START (SB_SECTOR * 512)
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+struct cache_sb_disk {
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+ __le64 csum;
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+ __le64 offset; /* sector where this sb was written */
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+ __le64 version;
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+
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+ __u8 magic[16];
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+
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+ __u8 uuid[16];
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+ union {
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+ __u8 set_uuid[16];
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+ __le64 set_magic;
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+ };
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+ __u8 label[SB_LABEL_SIZE];
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+
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+ __le64 flags;
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+ __le64 seq;
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+
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+ __le64 pad[8];
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+
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+ union {
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+ struct {
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+ /* Cache devices */
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+ __le64 nbuckets; /* device size */
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+
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+ __le16 block_size; /* sectors */
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+ __le16 bucket_size; /* sectors */
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+
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+ __le16 nr_in_set;
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+ __le16 nr_this_dev;
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+ };
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+ struct {
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+ /* Backing devices */
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+ __le64 data_offset;
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+
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+ /*
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+ * block_size from the cache device section is still used by
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+ * backing devices, so don't add anything here until we fix
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+ * things to not need it for backing devices anymore
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+ */
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+ };
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+ };
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+
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+ __le32 last_mount; /* time overflow in y2106 */
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+
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+ __le16 first_bucket;
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+ union {
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+ __le16 njournal_buckets;
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+ __le16 keys;
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+ };
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+ __le64 d[SB_JOURNAL_BUCKETS]; /* journal buckets */
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+};
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+
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struct cache_sb {
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uint64_t csum;
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uint64_t offset; /* sector where this sb was written */
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--
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2.26.2
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