import the U-Boot code and make it compile

1 files changed, 127 insertions, 0 deletions

diff --git a/ext4_journal.h b/ext4_journal.h
new file mode 100644
index 0000000..43fb8e7
--- /dev/null
+++ b/ext4_journal.h
@@ -0,0 +1,127 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2011 - 2012 Samsung Electronics
+ * EXT4 filesystem implementation in Uboot by
+ * Uma Shankar <uma.shankar@samsung.com>
+ * Manjunatha C Achar <a.manjunatha@samsung.com>
+ *
+ * Journal data structures and headers for Journaling feature of ext4
+ * have been referred from JBD2 (Journaling Block device 2)
+ * implementation in Linux Kernel.
+ *
+ * Written by Stephen C. Tweedie <sct@redhat.com>
+ *
+ * Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved
+ */
+
+#ifndef __EXT4_JRNL__
+#define __EXT4_JRNL__
+
+#define EXT4_FEATURE_COMPAT_HAS_JOURNAL		0x0004
+
+#define EXT2_JOURNAL_INO		8	/* Journal inode */
+#define EXT2_JOURNAL_SUPERBLOCK	0	/* Journal  Superblock number */
+
+#define JBD2_FEATURE_COMPAT_CHECKSUM	0x00000001
+#define EXT3_JOURNAL_MAGIC_NUMBER	0xc03b3998U
+#define TRANSACTION_RUNNING		1
+#define TRANSACTION_COMPLETE		0
+#define EXT3_FEATURE_INCOMPAT_RECOVER	0x0004	/* Needs recovery */
+#define EXT3_JOURNAL_DESCRIPTOR_BLOCK	1
+#define EXT3_JOURNAL_COMMIT_BLOCK	2
+#define EXT3_JOURNAL_SUPERBLOCK_V1	3
+#define EXT3_JOURNAL_SUPERBLOCK_V2	4
+#define EXT3_JOURNAL_REVOKE_BLOCK	5
+#define EXT3_JOURNAL_FLAG_ESCAPE	1
+#define EXT3_JOURNAL_FLAG_SAME_UUID	2
+#define EXT3_JOURNAL_FLAG_DELETED	4
+#define EXT3_JOURNAL_FLAG_LAST_TAG	8
+
+/* Maximum entries in 1 journal transaction */
+#define MAX_JOURNAL_ENTRIES 100
+struct journal_log {
+	char *buf;
+	int blknr;
+};
+
+struct dirty_blocks {
+	char *buf;
+	int blknr;
+};
+
+/* Standard header for all descriptor blocks: */
+struct journal_header_t {
+	__be32 h_magic;
+	__be32 h_blocktype;
+	__be32 h_sequence;
+};
+
+/* The journal superblock.  All fields are in big-endian byte order. */
+struct journal_superblock_t {
+	/* 0x0000 */
+	struct journal_header_t s_header;
+
+	/* Static information describing the journal */
+	__be32 s_blocksize;	/* journal device blocksize */
+	__be32 s_maxlen;		/* total blocks in journal file */
+	__be32 s_first;		/* first block of log information */
+
+	/* Dynamic information describing the current state of the log */
+	__be32 s_sequence;	/* first commit ID expected in log */
+	__be32 s_start;		/* blocknr of start of log */
+
+	/* Error value, as set by journal_abort(). */
+	__be32 s_errno;
+
+	/* Remaining fields are only valid in a version-2 superblock */
+	__be32 s_feature_compat;	/* compatible feature set */
+	__be32 s_feature_incompat;	/* incompatible feature set */
+	__be32 s_feature_ro_compat;	/* readonly-compatible feature set */
+	/* 0x0030 */
+	__u8 s_uuid[16];	/* 128-bit uuid for journal */
+
+	/* 0x0040 */
+	__be32 s_nr_users;	/* Nr of filesystems sharing log */
+
+	__be32 s_dynsuper;	/* Blocknr of dynamic superblock copy */
+
+	/* 0x0048 */
+	__be32 s_max_transaction;	/* Limit of journal blocks per trans. */
+	__be32 s_max_trans_data;	/* Limit of data blocks per trans. */
+
+	/* 0x0050 */
+	__be32 s_padding[44];
+
+	/* 0x0100 */
+	__u8 s_users[16 * 48];	/* ids of all fs'es sharing the log */
+	/* 0x0400 */
+} ;
+
+struct ext3_journal_block_tag {
+	__be32 block;
+	__be32 flags;
+};
+
+struct journal_revoke_header_t {
+	struct journal_header_t r_header;
+	__be32 r_count;		/* Count of bytes used in the block */
+};
+
+struct revoke_blk_list {
+	char *content;		/* revoke block itself */
+	struct revoke_blk_list *next;
+};
+
+extern struct ext2_data *ext4fs_root;
+
+int ext4fs_init_journal(void);
+int ext4fs_log_gdt(char *gd_table);
+int ext4fs_check_journal_state(int recovery_flag);
+int ext4fs_log_journal(char *journal_buffer, uint32_t blknr);
+int ext4fs_put_metadata(char *metadata_buffer, uint32_t blknr);
+void ext4fs_update_journal(void);
+void ext4fs_dump_metadata(void);
+void ext4fs_push_revoke_blk(char *buffer);
+void ext4fs_free_journal(void);
+void ext4fs_free_revoke_blks(void);
+#endif