linux-kernel - [PATCH v9 08/11] btrfs: add raid stripe tree pretty printer

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230914-raid-stripe-tree-v9-8-15d423829637@wdc.com>
Date:   Thu, 14 Sep 2023 09:07:03 -0700
From:   Johannes Thumshirn <johannes.thumshirn@....com>
To:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>
Cc:     Christoph Hellwig <hch@....de>,
        Naohiro Aota <naohiro.aota@....com>, Qu Wenruo <wqu@...e.com>,
        Damien Le Moal <dlemoal@...nel.org>,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH v9 08/11] btrfs: add raid stripe tree pretty printer

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

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
---
 fs/btrfs/print-tree.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 0c93439e929f..f3f487fc6400 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -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 +192,24 @@ 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);
+	int i;
+
+	pr_info("\t\t\tencoding: %s\n",
+		(encoding && encoding < BTRFS_NR_RAID_TYPES) ?
+			btrfs_raid_array[encoding].raid_name : "unknown");
+
+	for (i = 0; i < num_stripes; i++)
+		pr_info("\t\t\tstride %d devid %llu physical %llu length %llu\n",
+			i, btrfs_raid_stride_devid(eb, &stripe->strides[i]),
+			btrfs_raid_stride_physical(eb, &stripe->strides[i]),
+			btrfs_raid_stride_length(eb, &stripe->strides[i]));
+}
+
 /*
  * Helper to output refs and locking status of extent buffer.  Useful to debug
  * race condition related problems.
@@ -349,6 +370,11 @@ 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;
 		}
 	}
 }

-- 
2.41.0