add ax88772_rst

hc

2024-05-10 9999e48639b3cecb08ffb37358bcba3b48161b29

 kernel/fs/btrfs/block-group.c
..
..
@@ -77,14 +77,21 @@
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 	}
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 	allowed &= flags;
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-	if (allowed & BTRFS_BLOCK_GROUP_RAID6)
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+	/* Select the highest-redundancy RAID level. */
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+	if (allowed & BTRFS_BLOCK_GROUP_RAID1C4)
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+		allowed = BTRFS_BLOCK_GROUP_RAID1C4;
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+	else if (allowed & BTRFS_BLOCK_GROUP_RAID6)
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 		allowed = BTRFS_BLOCK_GROUP_RAID6;
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+	else if (allowed & BTRFS_BLOCK_GROUP_RAID1C3)
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+		allowed = BTRFS_BLOCK_GROUP_RAID1C3;
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 	else if (allowed & BTRFS_BLOCK_GROUP_RAID5)
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 		allowed = BTRFS_BLOCK_GROUP_RAID5;
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 	else if (allowed & BTRFS_BLOCK_GROUP_RAID10)
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 		allowed = BTRFS_BLOCK_GROUP_RAID10;
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 	else if (allowed & BTRFS_BLOCK_GROUP_RAID1)
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 		allowed = BTRFS_BLOCK_GROUP_RAID1;
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+	else if (allowed & BTRFS_BLOCK_GROUP_DUP)
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+		allowed = BTRFS_BLOCK_GROUP_DUP;
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 	else if (allowed & BTRFS_BLOCK_GROUP_RAID0)
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 		allowed = BTRFS_BLOCK_GROUP_RAID0;
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..
..
@@ -2279,10 +2286,20 @@
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 	}
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 	ret = inc_block_group_ro(cache, 0);
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-	if (!do_chunk_alloc || ret == -ETXTBSY)
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-		goto unlock_out;
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 	if (!ret)
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 		goto out;
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+	if (ret == -ETXTBSY)
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+		goto unlock_out;
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+
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+	/*
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+	 * Skip chunk alloction if the bg is SYSTEM, this is to avoid system
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+	 * chunk allocation storm to exhaust the system chunk array.  Otherwise
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+	 * we still want to try our best to mark the block group read-only.
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+	 */
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+	if (!do_chunk_alloc && ret == -ENOSPC &&
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+	    (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM))
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+		goto unlock_out;
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+
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 	alloc_flags = btrfs_get_alloc_profile(fs_info, cache->space_info->flags);
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 	ret = btrfs_chunk_alloc(trans, alloc_flags, CHUNK_ALLOC_FORCE);
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 	if (ret < 0)