Commit edde81f1 authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by David Sterba
Browse files

btrfs: add raid stripe tree pretty printer 



Decode raid-stripe-tree entries on btrfs_print_tree().

Signed-off-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 568220fa

fs/btrfs/print-tree.c

+23 −0
Original line number Diff line number Diff line
@@ -9,6 +9,8 @@ 
#include "print-tree.h"

#include "accessors.h"

#include "tree-checker.h"

#include "volumes.h"

#include "raid-stripe-tree.h"



struct root_name_map {

	u64 id;
@@ -28,6 +30,7 @@ static const struct root_name_map root_map[] = { 
	{ BTRFS_FREE_SPACE_TREE_OBJECTID,	"FREE_SPACE_TREE"	},

	{ BTRFS_BLOCK_GROUP_TREE_OBJECTID,	"BLOCK_GROUP_TREE"	},

	{ BTRFS_DATA_RELOC_TREE_OBJECTID,	"DATA_RELOC_TREE"	},

	{ BTRFS_RAID_STRIPE_TREE_OBJECTID,	"RAID_STRIPE_TREE"	},

};



const char *btrfs_root_name(const struct btrfs_key *key, char *buf)
@@ -189,6 +192,22 @@ static void print_uuid_item(const struct extent_buffer *l, unsigned long offset, 
	}

}



static void print_raid_stripe_key(const struct extent_buffer *eb, u32 item_size,

				  struct btrfs_stripe_extent *stripe)

{

	const int num_stripes = btrfs_num_raid_stripes(item_size);

	const u8 encoding = btrfs_stripe_extent_encoding(eb, stripe);



	pr_info("\t\t\tencoding: %s\n",

		(encoding && encoding < BTRFS_NR_RAID_TYPES) ?

		btrfs_raid_array[encoding].raid_name : "unknown");



	for (int i = 0; i < num_stripes; i++)

		pr_info("\t\t\tstride %d devid %llu physical %llu\n",

			i, btrfs_raid_stride_devid(eb, &stripe->strides[i]),

			btrfs_raid_stride_physical(eb, &stripe->strides[i]));

}



/*

 * Helper to output refs and locking status of extent buffer.  Useful to debug

 * race condition related problems.
@@ -349,6 +368,10 @@ void btrfs_print_leaf(const struct extent_buffer *l) 
			print_uuid_item(l, btrfs_item_ptr_offset(l, i),

					btrfs_item_size(l, i));

			break;

		case BTRFS_RAID_STRIPE_KEY:

			print_raid_stripe_key(l, btrfs_item_size(l, i),

				btrfs_item_ptr(l, i, struct btrfs_stripe_extent));

			break;

		}

	}

}