btrfs: make block group flags in balance printks human-readable (ebce0e01) · Commits · 戴 / test

fs/btrfs/relocation.c

+40 −3

Original line number	Diff line number	Diff line
		@@ -4332,6 +4332,45 @@ static struct reloc_control alloc_reloc_control(struct btrfs_fs_info fs_info)
		return rc;
		}

		/*
		* Print the block group being relocated
		*/
		static void describe_relocation(struct btrfs_fs_info *fs_info,
		struct btrfs_block_group_cache *block_group)
		{
		char buf[128]; /* prefixed by a '\|' that'll be dropped */
		u64 flags = block_group->flags;

		/* Shouldn't happen */
		if (!flags) {
		strcpy(buf, "\|NONE");
		} else {
		char *bp = buf;

		#define DESCRIBE_FLAG(f, d) \
		if (flags & BTRFS_BLOCK_GROUP_##f) { \
		bp += snprintf(bp, buf - bp + sizeof(buf), "\|%s", d); \
		flags &= ~BTRFS_BLOCK_GROUP_##f; \
		}
		DESCRIBE_FLAG(DATA, "data");
		DESCRIBE_FLAG(SYSTEM, "system");
		DESCRIBE_FLAG(METADATA, "metadata");
		DESCRIBE_FLAG(RAID0, "raid0");
		DESCRIBE_FLAG(RAID1, "raid1");
		DESCRIBE_FLAG(DUP, "dup");
		DESCRIBE_FLAG(RAID10, "raid10");
		DESCRIBE_FLAG(RAID5, "raid5");
		DESCRIBE_FLAG(RAID6, "raid6");
		if (flags)
		snprintf(buf, buf - bp + sizeof(buf), "\|0x%llx", flags);
		#undef DESCRIBE_FLAG
		}

		btrfs_info(fs_info,
		"relocating block group %llu flags %s",
		block_group->key.objectid, buf + 1);
		}

		/*
		* function to relocate all extents in a block group.
		*/
		@@ -4388,9 +4427,7 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
		goto out;
		}

		btrfs_info(extent_root->fs_info,
		"relocating block group %llu flags %llu",
		rc->block_group->key.objectid, rc->block_group->flags);
		describe_relocation(extent_root->fs_info, rc->block_group);

		btrfs_wait_block_group_reservations(rc->block_group);
		btrfs_wait_nocow_writers(rc->block_group);

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