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Commit 8f8ae8e2 authored by Stefan Behrens's avatar Stefan Behrens Committed by Chris Mason
Browse files

Btrfs: support printing UUID tree elements 



This commit adds support to print UUID tree elements to print-tree.c.

Signed-off-by: default avatarStefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
parent 07b30a49

fs/btrfs/print-tree.c

+24 −0
Original line number Diff line number Diff line
@@ -155,6 +155,25 @@ static void print_extent_ref_v0(struct extent_buffer *eb, int slot) 
}

#endif



static void print_uuid_item(struct extent_buffer *l, unsigned long offset,

			    u32 item_size)

{

	if (!IS_ALIGNED(item_size, sizeof(u64))) {

		pr_warn("btrfs: uuid item with illegal size %lu!\n",

			(unsigned long)item_size);

		return;

	}

	while (item_size) {

		__le64 subvol_id;



		read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));

		printk(KERN_INFO "\t\tsubvol_id %llu\n",

		       (unsigned long long)le64_to_cpu(subvol_id));

		item_size -= sizeof(u64);

		offset += sizeof(u64);

	}

}



void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)

{

	int i;
@@ -301,6 +320,11 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) 
		case BTRFS_DEV_REPLACE_KEY:

			printk(KERN_INFO "\t\tdev replace\n");

			break;

		case BTRFS_UUID_KEY_SUBVOL:

		case BTRFS_UUID_KEY_RECEIVED_SUBVOL:

			print_uuid_item(l, btrfs_item_ptr_offset(l, i),

					btrfs_item_size_nr(l, i));

			break;

		};

	}

}