Btrfs: allow superblock mismatch from older mkfs
We've added new checks to make sure the super block crc is correct during mount. A fresh filesystem from an older mkfs won't have the crc set. This adds a warning when it finds a newly created filesystem but doesn't fail the mount. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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@ -383,6 +383,11 @@ static int btrfs_check_super_csum(char *raw_disk_sb)
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if (memcmp(raw_disk_sb, result, csum_size))
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ret = 1;
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if (ret && btrfs_super_generation(disk_sb) < 10) {
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printk(KERN_WARNING "btrfs: super block crcs don't match, older mkfs detected\n");
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ret = 0;
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}
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}
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if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
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