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author | Christoph Hellwig <hch@lst.de> | 2020-01-24 01:01:27 +0800 |
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committer | Jens Axboe <axboe@kernel.dk> | 2020-01-23 11:40:00 -0700 |
commit | a702a692cd7559053ea573f4e2c84828f0e62824 (patch) | |
tree | 8a50b865f2ebfc18ce83e99ba217195dd591ceb7 /include/uapi/linux/bcache.h | |
parent | e8547d42095e58bee658f00fef8e33d2a185c927 (diff) | |
download | linux-stable-a702a692cd7559053ea573f4e2c84828f0e62824.tar.gz linux-stable-a702a692cd7559053ea573f4e2c84828f0e62824.tar.bz2 linux-stable-a702a692cd7559053ea573f4e2c84828f0e62824.zip |
bcache: use a separate data structure for the on-disk super block
Split out an on-disk version struct cache_sb with the proper endianness
annotations. This fixes a fair chunk of sparse warnings, but there are
some left due to the way the checksum is defined.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi/linux/bcache.h')
-rw-r--r-- | include/uapi/linux/bcache.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/uapi/linux/bcache.h b/include/uapi/linux/bcache.h index 5d4f58e059fd..1d8b3a9fc080 100644 --- a/include/uapi/linux/bcache.h +++ b/include/uapi/linux/bcache.h @@ -156,6 +156,57 @@ static inline struct bkey *bkey_idx(const struct bkey *k, unsigned int nr_keys) #define BDEV_DATA_START_DEFAULT 16 /* sectors */ +struct cache_sb_disk { + __le64 csum; + __le64 offset; /* sector where this sb was written */ + __le64 version; + + __u8 magic[16]; + + __u8 uuid[16]; + union { + __u8 set_uuid[16]; + __le64 set_magic; + }; + __u8 label[SB_LABEL_SIZE]; + + __le64 flags; + __le64 seq; + __le64 pad[8]; + + union { + struct { + /* Cache devices */ + __le64 nbuckets; /* device size */ + + __le16 block_size; /* sectors */ + __le16 bucket_size; /* sectors */ + + __le16 nr_in_set; + __le16 nr_this_dev; + }; + struct { + /* Backing devices */ + __le64 data_offset; + + /* + * block_size from the cache device section is still used by + * backing devices, so don't add anything here until we fix + * things to not need it for backing devices anymore + */ + }; + }; + + __le32 last_mount; /* time overflow in y2106 */ + + __le16 first_bucket; + union { + __le16 njournal_buckets; + __le16 keys; + }; + __le64 d[SB_JOURNAL_BUCKETS]; /* journal buckets */ +}; + struct cache_sb { __u64 csum; __u64 offset; /* sector where this sb was written */ |