1 files changed, 222 insertions, 34 deletions

diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 74e38da9bd39..62b993fae54f 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -6,12 +6,19 @@
 #include "messages.h"
 #include "ctree.h"
 #include "disk-io.h"
+#include "file-item.h"
 #include "print-tree.h"
 #include "accessors.h"
 #include "tree-checker.h"
 #include "volumes.h"
 #include "raid-stripe-tree.h"
 
+/*
+ * Large enough buffer size for the stringification of any key type yet short
+ * enough to use the stack and avoid allocations.
+ */
+#define KEY_TYPE_BUF_SIZE 32
+
 struct root_name_map {
 	u64 id;
 	const char *name;
@@ -227,21 +234,209 @@ static void print_eb_refs_lock(const struct extent_buffer *eb)
 #endif
 }
 
+static void print_timespec(const struct extent_buffer *eb,
+			   struct btrfs_timespec *timespec,
+			   const char *prefix, const char *suffix)
+{
+	const u64 secs = btrfs_timespec_sec(eb, timespec);
+	const u32 nsecs = btrfs_timespec_nsec(eb, timespec);
+
+	pr_info("%s%llu.%u%s", prefix, secs, nsecs, suffix);
+}
+
+static void print_inode_item(const struct extent_buffer *eb, int i)
+{
+	struct btrfs_inode_item *ii = btrfs_item_ptr(eb, i, struct btrfs_inode_item);
+
+	pr_info("\t\tinode generation %llu transid %llu size %llu nbytes %llu\n",
+		btrfs_inode_generation(eb, ii), btrfs_inode_transid(eb, ii),
+		btrfs_inode_size(eb, ii), btrfs_inode_nbytes(eb, ii));
+	pr_info("\t\tblock group %llu mode %o links %u uid %u gid %u\n",
+		btrfs_inode_block_group(eb, ii), btrfs_inode_mode(eb, ii),
+		btrfs_inode_nlink(eb, ii), btrfs_inode_uid(eb, ii),
+		btrfs_inode_gid(eb, ii));
+	pr_info("\t\trdev %llu sequence %llu flags 0x%llx\n",
+		btrfs_inode_rdev(eb, ii), btrfs_inode_sequence(eb, ii),
+		btrfs_inode_flags(eb, ii));
+	print_timespec(eb, &ii->atime, "\t\tatime ", "\n");
+	print_timespec(eb, &ii->ctime, "\t\tctime ", "\n");
+	print_timespec(eb, &ii->mtime, "\t\tmtime ", "\n");
+	print_timespec(eb, &ii->otime, "\t\totime ", "\n");
+}
+
+static void print_dir_item(const struct extent_buffer *eb, int i)
+{
+	const u32 size = btrfs_item_size(eb, i);
+	struct btrfs_dir_item *di = btrfs_item_ptr(eb, i, struct btrfs_dir_item);
+	u32 cur = 0;
+
+	while (cur < size) {
+		const u32 name_len = btrfs_dir_name_len(eb, di);
+		const u32 data_len = btrfs_dir_data_len(eb, di);
+		const u32 len = sizeof(*di) + name_len + data_len;
+		struct btrfs_key location;
+
+		btrfs_dir_item_key_to_cpu(eb, di, &location);
+		pr_info("\t\tlocation key (%llu %u %llu) type %d\n",
+			location.objectid, location.type, location.offset,
+			btrfs_dir_ftype(eb, di));
+		pr_info("\t\ttransid %llu data_len %u name_len %u\n",
+			btrfs_dir_transid(eb, di), data_len, name_len);
+		di = (struct btrfs_dir_item *)((char *)di + len);
+		cur += len;
+	}
+}
+
+static void print_inode_ref_item(const struct extent_buffer *eb, int i)
+{
+	const u32 size = btrfs_item_size(eb, i);
+	struct btrfs_inode_ref *ref = btrfs_item_ptr(eb, i, struct btrfs_inode_ref);
+	u32 cur = 0;
+
+	while (cur < size) {
+		const u64 index = btrfs_inode_ref_index(eb, ref);
+		const u32 name_len = btrfs_inode_ref_name_len(eb, ref);
+		const u32 len = sizeof(*ref) + name_len;
+
+		pr_info("\t\tindex %llu name_len %u\n", index, name_len);
+		ref = (struct btrfs_inode_ref *)((char *)ref + len);
+		cur += len;
+	}
+}
+
+static void print_inode_extref_item(const struct extent_buffer *eb, int i)
+{
+	const u32 size = btrfs_item_size(eb, i);
+	struct btrfs_inode_extref *extref;
+	u32 cur = 0;
+
+	extref = btrfs_item_ptr(eb, i, struct btrfs_inode_extref);
+	while (cur < size) {
+		const u64 index = btrfs_inode_extref_index(eb, extref);
+		const u32 name_len = btrfs_inode_extref_name_len(eb, extref);
+		const u64 parent = btrfs_inode_extref_parent(eb, extref);
+		const u32 len = sizeof(*extref) + name_len;
+
+		pr_info("\t\tindex %llu parent %llu name_len %u\n",
+			index, parent, name_len);
+		extref = (struct btrfs_inode_extref *)((char *)extref + len);
+		cur += len;
+	}
+}
+
+static void print_dir_log_index_item(const struct extent_buffer *eb, int i)
+{
+	struct btrfs_dir_log_item *dlog;
+
+	dlog = btrfs_item_ptr(eb, i, struct btrfs_dir_log_item);
+	pr_info("\t\tdir log end %llu\n", btrfs_dir_log_end(eb, dlog));
+}
+
+static void print_extent_csum(const struct extent_buffer *eb, int i)
+{
+	const struct btrfs_fs_info *fs_info = eb->fs_info;
+	const u32 size = btrfs_item_size(eb, i);
+	const u32 csum_bytes = (size / fs_info->csum_size) * fs_info->sectorsize;
+	struct btrfs_key key;
+
+	btrfs_item_key_to_cpu(eb, &key, i);
+	pr_info("\t\trange start %llu end %llu length %u\n",
+		key.offset, key.offset + csum_bytes, csum_bytes);
+}
+
+static void print_file_extent_item(const struct extent_buffer *eb, int i)
+{
+	struct btrfs_file_extent_item *fi;
+
+	fi = btrfs_item_ptr(eb, i, struct btrfs_file_extent_item);
+	pr_info("\t\tgeneration %llu type %hhu\n",
+		btrfs_file_extent_generation(eb, fi),
+		btrfs_file_extent_type(eb, fi));
+
+	if (btrfs_file_extent_type(eb, fi) == BTRFS_FILE_EXTENT_INLINE) {
+		pr_info("\t\tinline extent data size %u ram_bytes %llu compression %hhu\n",
+			btrfs_file_extent_inline_item_len(eb, i),
+			btrfs_file_extent_ram_bytes(eb, fi),
+			btrfs_file_extent_compression(eb, fi));
+		return;
+	}
+
+	pr_info("\t\textent data disk bytenr %llu nr %llu\n",
+		btrfs_file_extent_disk_bytenr(eb, fi),
+		btrfs_file_extent_disk_num_bytes(eb, fi));
+	pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
+		btrfs_file_extent_offset(eb, fi),
+		btrfs_file_extent_num_bytes(eb, fi),
+		btrfs_file_extent_ram_bytes(eb, fi));
+	pr_info("\t\textent compression %hhu\n",
+		btrfs_file_extent_compression(eb, fi));
+}
+
+static void key_type_string(const struct btrfs_key *key, char *buf, int buf_size)
+{
+	static const char *key_to_str[256] = {
+		[BTRFS_INODE_ITEM_KEY]			= "INODE_ITEM",
+		[BTRFS_INODE_REF_KEY]			= "INODE_REF",
+		[BTRFS_INODE_EXTREF_KEY]		= "INODE_EXTREF",
+		[BTRFS_DIR_ITEM_KEY]			= "DIR_ITEM",
+		[BTRFS_DIR_INDEX_KEY]			= "DIR_INDEX",
+		[BTRFS_DIR_LOG_ITEM_KEY]		= "DIR_LOG_ITEM",
+		[BTRFS_DIR_LOG_INDEX_KEY]		= "DIR_LOG_INDEX",
+		[BTRFS_XATTR_ITEM_KEY]			= "XATTR_ITEM",
+		[BTRFS_VERITY_DESC_ITEM_KEY]		= "VERITY_DESC_ITEM",
+		[BTRFS_VERITY_MERKLE_ITEM_KEY]		= "VERITY_MERKLE_ITEM",
+		[BTRFS_ORPHAN_ITEM_KEY]			= "ORPHAN_ITEM",
+		[BTRFS_ROOT_ITEM_KEY]			= "ROOT_ITEM",
+		[BTRFS_ROOT_REF_KEY]			= "ROOT_REF",
+		[BTRFS_ROOT_BACKREF_KEY]		= "ROOT_BACKREF",
+		[BTRFS_EXTENT_ITEM_KEY]			= "EXTENT_ITEM",
+		[BTRFS_METADATA_ITEM_KEY]		= "METADATA_ITEM",
+		[BTRFS_TREE_BLOCK_REF_KEY]		= "TREE_BLOCK_REF",
+		[BTRFS_SHARED_BLOCK_REF_KEY]		= "SHARED_BLOCK_REF",
+		[BTRFS_EXTENT_DATA_REF_KEY]		= "EXTENT_DATA_REF",
+		[BTRFS_SHARED_DATA_REF_KEY]		= "SHARED_DATA_REF",
+		[BTRFS_EXTENT_OWNER_REF_KEY]		= "EXTENT_OWNER_REF",
+		[BTRFS_EXTENT_CSUM_KEY]			= "EXTENT_CSUM",
+		[BTRFS_EXTENT_DATA_KEY]			= "EXTENT_DATA",
+		[BTRFS_BLOCK_GROUP_ITEM_KEY]		= "BLOCK_GROUP_ITEM",
+		[BTRFS_FREE_SPACE_INFO_KEY]		= "FREE_SPACE_INFO",
+		[BTRFS_FREE_SPACE_EXTENT_KEY]		= "FREE_SPACE_EXTENT",
+		[BTRFS_FREE_SPACE_BITMAP_KEY]		= "FREE_SPACE_BITMAP",
+		[BTRFS_CHUNK_ITEM_KEY]			= "CHUNK_ITEM",
+		[BTRFS_DEV_ITEM_KEY]			= "DEV_ITEM",
+		[BTRFS_DEV_EXTENT_KEY]			= "DEV_EXTENT",
+		[BTRFS_TEMPORARY_ITEM_KEY]		= "TEMPORARY_ITEM",
+		[BTRFS_DEV_REPLACE_KEY]			= "DEV_REPLACE",
+		[BTRFS_STRING_ITEM_KEY]			= "STRING_ITEM",
+		[BTRFS_QGROUP_STATUS_KEY]		= "QGROUP_STATUS",
+		[BTRFS_QGROUP_RELATION_KEY]		= "QGROUP_RELATION",
+		[BTRFS_QGROUP_INFO_KEY]			= "QGROUP_INFO",
+		[BTRFS_QGROUP_LIMIT_KEY]		= "QGROUP_LIMIT",
+		[BTRFS_PERSISTENT_ITEM_KEY]		= "PERSISTENT_ITEM",
+		[BTRFS_UUID_KEY_SUBVOL]			= "UUID_KEY_SUBVOL",
+		[BTRFS_UUID_KEY_RECEIVED_SUBVOL]	= "UUID_KEY_RECEIVED_SUBVOL",
+		[BTRFS_RAID_STRIPE_KEY]			= "RAID_STRIPE",
+	};
+
+	if (key->type == 0 && key->objectid == BTRFS_FREE_SPACE_OBJECTID)
+		scnprintf(buf, buf_size, "UNTYPED");
+	else if (key_to_str[key->type])
+		scnprintf(buf, buf_size, key_to_str[key->type]);
+	else
+		scnprintf(buf, buf_size, "UNKNOWN.%d", key->type);
+}
+
 void btrfs_print_leaf(const struct extent_buffer *l)
 {
 	struct btrfs_fs_info *fs_info;
 	int i;
 	u32 type, nr;
 	struct btrfs_root_item *ri;
-	struct btrfs_dir_item *di;
-	struct btrfs_inode_item *ii;
 	struct btrfs_block_group_item *bi;
-	struct btrfs_file_extent_item *fi;
 	struct btrfs_extent_data_ref *dref;
 	struct btrfs_shared_data_ref *sref;
 	struct btrfs_dev_extent *dev_extent;
 	struct btrfs_key key;
-	struct btrfs_key found_key;
 
 	if (!l)
 		return;
@@ -255,25 +450,35 @@ void btrfs_print_leaf(const struct extent_buffer *l)
 		   btrfs_leaf_free_space(l), btrfs_header_owner(l));
 	print_eb_refs_lock(l);
 	for (i = 0 ; i < nr ; i++) {
+		char key_buf[KEY_TYPE_BUF_SIZE];
+
 		btrfs_item_key_to_cpu(l, &key, i);
 		type = key.type;
-		pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
-			i, key.objectid, type, key.offset,
+		key_type_string(&key, key_buf, KEY_TYPE_BUF_SIZE);
+
+		pr_info("\titem %d key (%llu %s %llu) itemoff %d itemsize %d\n",
+			i, key.objectid, key_buf, key.offset,
 			btrfs_item_offset(l, i), btrfs_item_size(l, i));
 		switch (type) {
 		case BTRFS_INODE_ITEM_KEY:
-			ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
-			pr_info("\t\tinode generation %llu size %llu mode %o\n",
-			       btrfs_inode_generation(l, ii),
-			       btrfs_inode_size(l, ii),
-			       btrfs_inode_mode(l, ii));
+			print_inode_item(l, i);
+			break;
+		case BTRFS_INODE_REF_KEY:
+			print_inode_ref_item(l, i);
+			break;
+		case BTRFS_INODE_EXTREF_KEY:
+			print_inode_extref_item(l, i);
 			break;
 		case BTRFS_DIR_ITEM_KEY:
-			di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
-			btrfs_dir_item_key_to_cpu(l, di, &found_key);
-			pr_info("\t\tdir oid %llu flags %u\n",
-				found_key.objectid,
-				btrfs_dir_flags(l, di));
+		case BTRFS_DIR_INDEX_KEY:
+		case BTRFS_XATTR_ITEM_KEY:
+			print_dir_item(l, i);
+			break;
+		case BTRFS_DIR_LOG_INDEX_KEY:
+			print_dir_log_index_item(l, i);
+			break;
+		case BTRFS_EXTENT_CSUM_KEY:
+			print_extent_csum(l, i);
 			break;
 		case BTRFS_ROOT_ITEM_KEY:
 			ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
@@ -303,24 +508,7 @@ void btrfs_print_leaf(const struct extent_buffer *l)
 			       btrfs_shared_data_ref_count(l, sref));
 			break;
 		case BTRFS_EXTENT_DATA_KEY:
-			fi = btrfs_item_ptr(l, i,
-					    struct btrfs_file_extent_item);
-			pr_info("\t\tgeneration %llu type %hhu\n",
-				btrfs_file_extent_generation(l, fi),
-				btrfs_file_extent_type(l, fi));
-			if (btrfs_file_extent_type(l, fi) ==
-			    BTRFS_FILE_EXTENT_INLINE) {
-				pr_info("\t\tinline extent data size %llu\n",
-				       btrfs_file_extent_ram_bytes(l, fi));
-				break;
-			}
-			pr_info("\t\textent data disk bytenr %llu nr %llu\n",
-			       btrfs_file_extent_disk_bytenr(l, fi),
-			       btrfs_file_extent_disk_num_bytes(l, fi));
-			pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
-			       btrfs_file_extent_offset(l, fi),
-			       btrfs_file_extent_num_bytes(l, fi),
-			       btrfs_file_extent_ram_bytes(l, fi));
+			print_file_extent_item(l, i);
 			break;
 		case BTRFS_BLOCK_GROUP_ITEM_KEY:
 			bi = btrfs_item_ptr(l, i,