Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / fs / ext4 / ext4_journal.h

diff --git a/qemu/roms/u-boot/fs/ext4/ext4_journal.h b/qemu/roms/u-boot/fs/ext4/ext4_journal.h
new file mode 100644 (file)
index 0000000..d926094
--- /dev/null
+++ b/qemu/roms/u-boot/fs/ext4/ext4_journal.h
@@ -0,0 +1,125 @@
+/*
+ * (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
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef __EXT4_JRNL__
+#define __EXT4_JRNL__
+
+#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 {
+       __u32 h_magic;
+       __u32 h_blocktype;
+       __u32 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 */
+       __u32 s_blocksize;      /* journal device blocksize */
+       __u32 s_maxlen;         /* total blocks in journal file */
+       __u32 s_first;          /* first block of log information */
+
+       /* Dynamic information describing the current state of the log */
+       __u32 s_sequence;       /* first commit ID expected in log */
+       __u32 s_start;          /* blocknr of start of log */
+
+       /* Error value, as set by journal_abort(). */
+       __s32 s_errno;
+
+       /* Remaining fields are only valid in a version-2 superblock */
+       __u32 s_feature_compat; /* compatible feature set */
+       __u32 s_feature_incompat;       /* incompatible feature set */
+       __u32 s_feature_ro_compat;      /* readonly-compatible feature set */
+       /* 0x0030 */
+       __u8 s_uuid[16];        /* 128-bit uuid for journal */
+
+       /* 0x0040 */
+       __u32 s_nr_users;       /* Nr of filesystems sharing log */
+
+       __u32 s_dynsuper;       /* Blocknr of dynamic superblock copy */
+
+       /* 0x0048 */
+       __u32 s_max_transaction;        /* Limit of journal blocks per trans. */
+       __u32 s_max_trans_data; /* Limit of data blocks per trans. */
+
+       /* 0x0050 */
+       __u32 s_padding[44];
+
+       /* 0x0100 */
+       __u8 s_users[16 * 48];  /* ids of all fs'es sharing the log */
+       /* 0x0400 */
+} ;
+
+struct ext3_journal_block_tag {
+       uint32_t block;
+       uint32_t flags;
+};
+
+struct journal_revoke_header_t {
+       struct journal_header_t r_header;
+       int 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, long int blknr);
+int ext4fs_put_metadata(char *metadata_buffer, long int 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