diff mbox series

[4/6] btrfs-progs: handle fscrypt context items

Message ID b36f6c110fdf443495bba1fd6cbb1fbad8466192.1662417859.git.sweettea-kernel@dorminy.me (mailing list archive)
State New, archived
Headers show
Series btrfs-progs: add encryption support | expand

Commit Message

Sweet Tea Dorminy Sept. 6, 2022, 12:01 a.m. UTC 
Encrypted inodes have a new associated item, the fscrypt context, which
can be printed as a pure hex string in dump-tree.

Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
---
 kernel-shared/ctree.h      |  2 ++
 kernel-shared/print-tree.c | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)
diff mbox series

Patch

diff --git a/kernel-shared/ctree.h b/kernel-shared/ctree.h
index 4392393d..2541a102 100644
--- a/kernel-shared/ctree.h
+++ b/kernel-shared/ctree.h
@@ -1397,6 +1397,8 @@  static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
 #define BTRFS_VERITY_DESC_ITEM_KEY	36
 #define BTRFS_VERITY_MERKLE_ITEM_KEY	37
 
+#define BTRFS_FSCRYPT_CTXT_ITEM_KEY	41
+
 #define BTRFS_ORPHAN_ITEM_KEY		48
 
 #define BTRFS_DIR_LOG_ITEM_KEY  60
diff --git a/kernel-shared/print-tree.c b/kernel-shared/print-tree.c
index bb8db45c..2163f833 100644
--- a/kernel-shared/print-tree.c
+++ b/kernel-shared/print-tree.c
@@ -97,6 +97,20 @@  static void print_dir_item(struct extent_buffer *eb, u32 size,
 	}
 }
 
+static void print_fscrypt_context(struct extent_buffer *eb, int slot)
+{
+	int i;
+	unsigned long ptr = btrfs_item_ptr_offset(eb, slot);
+	u32 item_size = btrfs_item_size(eb, slot);
+	u8 ctx_buf[item_size];
+
+	read_extent_buffer(eb, ctx_buf, ptr, item_size);
+	printf("\t\tvalue: ");
+	for(i = 0; i < item_size; i++)
+		printf("%02x", ctx_buf[i]);
+	printf("\n");
+}
+
 static void print_inode_extref_item(struct extent_buffer *eb, u32 size,
 		struct btrfs_inode_extref *extref)
 {
@@ -671,6 +685,7 @@  void print_key_type(FILE *stream, u64 objectid, u8 type)
 		[BTRFS_DIR_LOG_ITEM_KEY]	= "DIR_LOG_ITEM",
 		[BTRFS_DIR_LOG_INDEX_KEY]	= "DIR_LOG_INDEX",
 		[BTRFS_XATTR_ITEM_KEY]		= "XATTR_ITEM",
+		[BTRFS_FSCRYPT_CTXT_ITEM_KEY]   = "FSCRYPT_CTXT_ITEM",
 		[BTRFS_VERITY_DESC_ITEM_KEY]	= "VERITY_DESC_ITEM",
 		[BTRFS_VERITY_MERKLE_ITEM_KEY]	= "VERITY_MERKLE_ITEM",
 		[BTRFS_ORPHAN_ITEM_KEY]		= "ORPHAN_ITEM",
@@ -1378,6 +1393,9 @@  void btrfs_print_leaf(struct extent_buffer *eb, unsigned int mode)
 		case BTRFS_XATTR_ITEM_KEY:
 			print_dir_item(eb, item_size, ptr);
 			break;
+		case BTRFS_FSCRYPT_CTXT_ITEM_KEY:
+			print_fscrypt_context(eb, i);
+			break;
 		case BTRFS_DIR_LOG_INDEX_KEY:
 		case BTRFS_DIR_LOG_ITEM_KEY: {
 			struct btrfs_dir_log_item *dlog;