[PATCH] btrfs: add remap tree definitions for print-tree

[PATCH] btrfs: add remap tree definitions for print-tree

[Mark Harmstone]

Add the definitions for the remap tree to print-tree.c, so that we get
more useful information if a tree is dumped to dmesg.

Signed-off-by: Mark Harmstone <mark@harmstone.com>
---
 fs/btrfs/print-tree.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index f189bf09ce6a..b7dfe877cf8d 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -38,6 +38,7 @@ static const struct root_name_map root_map[] = {
 	{ BTRFS_BLOCK_GROUP_TREE_OBJECTID,	"BLOCK_GROUP_TREE"	},
 	{ BTRFS_DATA_RELOC_TREE_OBJECTID,	"DATA_RELOC_TREE"	},
 	{ BTRFS_RAID_STRIPE_TREE_OBJECTID,	"RAID_STRIPE_TREE"	},
+	{ BTRFS_REMAP_TREE_OBJECTID,		"REMAP_TREE"		},
 };
 
 const char *btrfs_root_name(const struct btrfs_key *key, char *buf)
@@ -415,6 +416,9 @@ static void key_type_string(const struct btrfs_key *key, char *buf, int buf_size
 		[BTRFS_UUID_KEY_SUBVOL]			= "UUID_KEY_SUBVOL",
 		[BTRFS_UUID_KEY_RECEIVED_SUBVOL]	= "UUID_KEY_RECEIVED_SUBVOL",
 		[BTRFS_RAID_STRIPE_KEY]			= "RAID_STRIPE",
+		[BTRFS_IDENTITY_REMAP_KEY]		= "IDENTITY_REMAP",
+		[BTRFS_REMAP_KEY]			= "REMAP",
+		[BTRFS_REMAP_BACKREF_KEY]		= "REMAP_BACKREF",
 	};
 
 	if (key->type == 0 && key->objectid == BTRFS_FREE_SPACE_OBJECTID)
@@ -435,6 +439,7 @@ void btrfs_print_leaf(const struct extent_buffer *l)
 	struct btrfs_extent_data_ref *dref;
 	struct btrfs_shared_data_ref *sref;
 	struct btrfs_dev_extent *dev_extent;
+	struct btrfs_remap_item *remap;
 	struct btrfs_key key;
 
 	if (!l)
@@ -569,6 +574,11 @@ void btrfs_print_leaf(const struct extent_buffer *l)
 			print_raid_stripe_key(l, btrfs_item_size(l, i),
 				btrfs_item_ptr(l, i, struct btrfs_stripe_extent));
 			break;
+		case BTRFS_REMAP_KEY:
+		case BTRFS_REMAP_BACKREF_KEY:
+			remap = btrfs_item_ptr(l, i, struct btrfs_remap_item);
+			pr_info("\t\taddress %llu\n", btrfs_remap_address(l, remap));
+			break;
 		}
 	}
 }
-- 
2.52.0

Re: [PATCH] btrfs: add remap tree definitions for print-tree

[Johannes Thumshirn]

Looks good,

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Re: [PATCH] btrfs: add remap tree definitions for print-tree

[Qu Wenruo]

在 2026/2/10 04:40, Mark Harmstone 写道:
> Add the definitions for the remap tree to print-tree.c, so that we get
> more useful information if a tree is dumped to dmesg.
> 
> Signed-off-by: Mark Harmstone <mark@harmstone.com>

Reviewed-by: Qu Wenruo <wqu@suse.com>

Thanks,
Qu

> ---
>   fs/btrfs/print-tree.c | 10 ++++++++++
>   1 file changed, 10 insertions(+)
> 
> diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
> index f189bf09ce6a..b7dfe877cf8d 100644
> --- a/fs/btrfs/print-tree.c
> +++ b/fs/btrfs/print-tree.c
> @@ -38,6 +38,7 @@ static const struct root_name_map root_map[] = {
>   	{ BTRFS_BLOCK_GROUP_TREE_OBJECTID,	"BLOCK_GROUP_TREE"	},
>   	{ BTRFS_DATA_RELOC_TREE_OBJECTID,	"DATA_RELOC_TREE"	},
>   	{ BTRFS_RAID_STRIPE_TREE_OBJECTID,	"RAID_STRIPE_TREE"	},
> +	{ BTRFS_REMAP_TREE_OBJECTID,		"REMAP_TREE"		},
>   };
>   
>   const char *btrfs_root_name(const struct btrfs_key *key, char *buf)
> @@ -415,6 +416,9 @@ static void key_type_string(const struct btrfs_key *key, char *buf, int buf_size
>   		[BTRFS_UUID_KEY_SUBVOL]			= "UUID_KEY_SUBVOL",
>   		[BTRFS_UUID_KEY_RECEIVED_SUBVOL]	= "UUID_KEY_RECEIVED_SUBVOL",
>   		[BTRFS_RAID_STRIPE_KEY]			= "RAID_STRIPE",
> +		[BTRFS_IDENTITY_REMAP_KEY]		= "IDENTITY_REMAP",
> +		[BTRFS_REMAP_KEY]			= "REMAP",
> +		[BTRFS_REMAP_BACKREF_KEY]		= "REMAP_BACKREF",
>   	};
>   
>   	if (key->type == 0 && key->objectid == BTRFS_FREE_SPACE_OBJECTID)
> @@ -435,6 +439,7 @@ void btrfs_print_leaf(const struct extent_buffer *l)
>   	struct btrfs_extent_data_ref *dref;
>   	struct btrfs_shared_data_ref *sref;
>   	struct btrfs_dev_extent *dev_extent;
> +	struct btrfs_remap_item *remap;
>   	struct btrfs_key key;
>   
>   	if (!l)
> @@ -569,6 +574,11 @@ void btrfs_print_leaf(const struct extent_buffer *l)
>   			print_raid_stripe_key(l, btrfs_item_size(l, i),
>   				btrfs_item_ptr(l, i, struct btrfs_stripe_extent));
>   			break;
> +		case BTRFS_REMAP_KEY:
> +		case BTRFS_REMAP_BACKREF_KEY:
> +			remap = btrfs_item_ptr(l, i, struct btrfs_remap_item);
> +			pr_info("\t\taddress %llu\n", btrfs_remap_address(l, remap));
> +			break;
>   		}
>   	}
>   }