Hi,
This patch adds all necessary on-disk layout declarations related to attributes file.
With the best regards,
Vyacheslav Dubeyko.
---
From: Vyacheslav Dubeyko <slava@xxxxxxxxxxx>
Subject: [PATCH v3 2/5] hfsplus: add on-disk layout declarations related to attributes tree
This patch adds all necessary on-disk layout declarations related to attributes file.
Reported-by: Hin-Tak Leung <htl10@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Vyacheslav Dubeyko <slava@xxxxxxxxxxx>
---
fs/hfsplus/hfsplus_raw.h | 68 ++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 66 insertions(+), 2 deletions(-)
diff --git a/fs/hfsplus/hfsplus_raw.h b/fs/hfsplus/hfsplus_raw.h
index 921967e..452ede0 100644
--- a/fs/hfsplus/hfsplus_raw.h
+++ b/fs/hfsplus/hfsplus_raw.h
@@ -52,13 +52,23 @@
typedef __be32 hfsplus_cnid;
typedef __be16 hfsplus_unichr;
+#define HFSPLUS_MAX_STRLEN 255
+#define HFSPLUS_ATTR_MAX_STRLEN 127
+
/* A "string" as used in filenames, etc. */
struct hfsplus_unistr {
__be16 length;
- hfsplus_unichr unicode[255];
+ hfsplus_unichr unicode[HFSPLUS_MAX_STRLEN];
} __packed;
-#define HFSPLUS_MAX_STRLEN 255
+/*
+ * A "string" is used in attributes file
+ * for name of extended attribute
+ */
+struct hfsplus_attr_unistr {
+ __be16 length;
+ hfsplus_unichr unicode[HFSPLUS_ATTR_MAX_STRLEN];
+} __packed;
/* POSIX permissions */
struct hfsplus_perm {
@@ -291,6 +301,8 @@ struct hfsplus_cat_file {
/* File attribute bits */
#define HFSPLUS_FILE_LOCKED 0x0001
#define HFSPLUS_FILE_THREAD_EXISTS 0x0002
+#define HFSPLUS_XATTR_EXISTS 0x0004
+#define HFSPLUS_ACL_EXISTS 0x0008
/* HFS+ catalog thread (part of a cat_entry) */
struct hfsplus_cat_thread {
@@ -327,11 +339,63 @@ struct hfsplus_ext_key {
#define HFSPLUS_EXT_KEYLEN sizeof(struct hfsplus_ext_key)
+#define HFSPLUS_XATTR_FINDER_INFO_NAME "com.apple.FinderInfo"
+#define HFSPLUS_XATTR_ACL_NAME "com.apple.system.Security"
+
+#define HFSPLUS_ATTR_INLINE_DATA 0x10
+#define HFSPLUS_ATTR_FORK_DATA 0x20
+#define HFSPLUS_ATTR_EXTENTS 0x30
+
+/* HFS+ attributes tree key */
+struct hfsplus_attr_key {
+ __be16 key_len;
+ __be16 pad;
+ hfsplus_cnid cnid;
+ __be32 start_block;
+ struct hfsplus_attr_unistr key_name;
+} __packed;
+
+#define HFSPLUS_ATTR_KEYLEN sizeof(struct hfsplus_attr_key)
+
+/* HFS+ fork data attribute */
+struct hfsplus_attr_fork_data {
+ __be32 record_type;
+ __be32 reserved;
+ struct hfsplus_fork_raw the_fork;
+} __packed;
+
+/* HFS+ extension attribute */
+struct hfsplus_attr_extents {
+ __be32 record_type;
+ __be32 reserved;
+ struct hfsplus_extent extents;
+} __packed;
+
+#define HFSPLUS_MAX_INLINE_DATA_SIZE 3802
+
+/* HFS+ attribute inline data */
+struct hfsplus_attr_inline_data {
+ __be32 record_type;
+ __be32 reserved1;
+ u8 reserved2[6];
+ __be16 length;
+ u8 raw_bytes[HFSPLUS_MAX_INLINE_DATA_SIZE];
+} __packed;
+
+/* A data record in the attributes tree */
+typedef union {
+ __be32 record_type;
+ struct hfsplus_attr_fork_data fork_data;
+ struct hfsplus_attr_extents extents;
+ struct hfsplus_attr_inline_data inline_data;
+} __packed hfsplus_attr_entry;
+
/* HFS+ generic BTree key */
typedef union {
__be16 key_len;
struct hfsplus_cat_key cat;
struct hfsplus_ext_key ext;
+ struct hfsplus_attr_key attr;
} __packed hfsplus_btree_key;
#endif
--
1.7.9.5
--
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