Initial commit of ext4_utils

Change-Id: I911d5b7fd7170ec81d544850717d8e69976e272b

1 files changed, 141 insertions, 0 deletions

diff --git a/ext4_utils/jbd2.h b/ext4_utils/jbd2.h
new file mode 100644
index 00000000..1c816417
--- /dev/null
+++ b/ext4_utils/jbd2.h
@@ -0,0 +1,141 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _LINUX_JBD2_H
+#define _LINUX_JBD2_H
+
+#define JBD2_DEBUG
+#define jfs_debug jbd_debug
+
+#define journal_oom_retry 1
+
+#undef JBD2_PARANOID_IOFAIL
+
+#define JBD2_DEFAULT_MAX_COMMIT_AGE 5
+
+#define jbd_debug(f, a...)  
+
+#define JBD2_MIN_JOURNAL_BLOCKS 1024
+
+#define JBD2_MAGIC_NUMBER 0xc03b3998U  
+
+#define JBD2_DESCRIPTOR_BLOCK 1
+#define JBD2_COMMIT_BLOCK 2
+#define JBD2_SUPERBLOCK_V1 3
+#define JBD2_SUPERBLOCK_V2 4
+#define JBD2_REVOKE_BLOCK 5
+
+typedef struct journal_header_s
+{
+ __be32 h_magic;
+ __be32 h_blocktype;
+ __be32 h_sequence;
+} journal_header_t;
+
+#define JBD2_CRC32_CHKSUM 1
+#define JBD2_MD5_CHKSUM 2
+#define JBD2_SHA1_CHKSUM 3
+
+#define JBD2_CRC32_CHKSUM_SIZE 4
+
+#define JBD2_CHECKSUM_BYTES (32 / sizeof(u32))
+
+struct commit_header {
+ __be32 h_magic;
+ __be32 h_blocktype;
+ __be32 h_sequence;
+ unsigned char h_chksum_type;
+ unsigned char h_chksum_size;
+ unsigned char h_padding[2];
+ __be32 h_chksum[JBD2_CHECKSUM_BYTES];
+ __be64 h_commit_sec;
+ __be32 h_commit_nsec;
+};
+
+typedef struct journal_block_tag_s
+{
+ __be32 t_blocknr;
+ __be32 t_flags;
+ __be32 t_blocknr_high;
+} journal_block_tag_t;
+
+#define JBD2_TAG_SIZE32 (offsetof(journal_block_tag_t, t_blocknr_high))
+#define JBD2_TAG_SIZE64 (sizeof(journal_block_tag_t))
+
+typedef struct jbd2_journal_revoke_header_s
+{
+ journal_header_t r_header;
+ __be32 r_count;
+} jbd2_journal_revoke_header_t;
+
+#define JBD2_FLAG_ESCAPE 1  
+#define JBD2_FLAG_SAME_UUID 2  
+#define JBD2_FLAG_DELETED 4  
+#define JBD2_FLAG_LAST_TAG 8  
+
+typedef struct journal_superblock_s
+{
+
+ journal_header_t s_header;
+
+ __be32 s_blocksize;
+ __be32 s_maxlen;
+ __be32 s_first;
+
+ __be32 s_sequence;
+ __be32 s_start;
+
+ __be32 s_errno;
+
+ __be32 s_feature_compat;
+ __be32 s_feature_incompat;
+ __be32 s_feature_ro_compat;
+
+ __u8 s_uuid[16];
+
+ __be32 s_nr_users;
+
+ __be32 s_dynsuper;
+
+ __be32 s_max_transaction;
+ __be32 s_max_trans_data;
+
+ __u32 s_padding[44];
+
+ __u8 s_users[16*48];
+
+} journal_superblock_t;
+
+#define JBD2_HAS_COMPAT_FEATURE(j,mask)   ((j)->j_format_version >= 2 &&   ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask))))
+#define JBD2_HAS_RO_COMPAT_FEATURE(j,mask)   ((j)->j_format_version >= 2 &&   ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask))))
+#define JBD2_HAS_INCOMPAT_FEATURE(j,mask)   ((j)->j_format_version >= 2 &&   ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask))))
+
+#define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001
+
+#define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001
+#define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002
+#define JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT 0x00000004
+
+#define JBD2_KNOWN_COMPAT_FEATURES JBD2_FEATURE_COMPAT_CHECKSUM
+#define JBD2_KNOWN_ROCOMPAT_FEATURES 0
+#define JBD2_KNOWN_INCOMPAT_FEATURES (JBD2_FEATURE_INCOMPAT_REVOKE |   JBD2_FEATURE_INCOMPAT_64BIT |   JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)
+
+#define BJ_None 0  
+#define BJ_Metadata 1  
+#define BJ_Forget 2  
+#define BJ_IO 3  
+#define BJ_Shadow 4  
+#define BJ_LogCtl 5  
+#define BJ_Reserved 6  
+#define BJ_Types 7
+
+#endif
+