1/**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12#ifndef _LINUX_JBD2_H 13#define _LINUX_JBD2_H 14 15#define JBD2_DEBUG 16#define jfs_debug jbd_debug 17 18#define journal_oom_retry 1 19 20#undef JBD2_PARANOID_IOFAIL 21 22#define JBD2_DEFAULT_MAX_COMMIT_AGE 5 23 24#define jbd_debug(f, a...) 25 26#define JBD2_MIN_JOURNAL_BLOCKS 1024 27 28#define JBD2_MAGIC_NUMBER 0xc03b3998U 29 30#define JBD2_DESCRIPTOR_BLOCK 1 31#define JBD2_COMMIT_BLOCK 2 32#define JBD2_SUPERBLOCK_V1 3 33#define JBD2_SUPERBLOCK_V2 4 34#define JBD2_REVOKE_BLOCK 5 35 36typedef struct journal_header_s 37{ 38 __be32 h_magic; 39 __be32 h_blocktype; 40 __be32 h_sequence; 41} journal_header_t; 42 43#define JBD2_CRC32_CHKSUM 1 44#define JBD2_MD5_CHKSUM 2 45#define JBD2_SHA1_CHKSUM 3 46 47#define JBD2_CRC32_CHKSUM_SIZE 4 48 49#define JBD2_CHECKSUM_BYTES (32 / sizeof(u32)) 50 51struct commit_header { 52 __be32 h_magic; 53 __be32 h_blocktype; 54 __be32 h_sequence; 55 unsigned char h_chksum_type; 56 unsigned char h_chksum_size; 57 unsigned char h_padding[2]; 58 __be32 h_chksum[JBD2_CHECKSUM_BYTES]; 59 __be64 h_commit_sec; 60 __be32 h_commit_nsec; 61}; 62 63typedef struct journal_block_tag_s 64{ 65 __be32 t_blocknr; 66 __be32 t_flags; 67 __be32 t_blocknr_high; 68} journal_block_tag_t; 69 70#define JBD2_TAG_SIZE32 (offsetof(journal_block_tag_t, t_blocknr_high)) 71#define JBD2_TAG_SIZE64 (sizeof(journal_block_tag_t)) 72 73typedef struct jbd2_journal_revoke_header_s 74{ 75 journal_header_t r_header; 76 __be32 r_count; 77} jbd2_journal_revoke_header_t; 78 79#define JBD2_FLAG_ESCAPE 1 80#define JBD2_FLAG_SAME_UUID 2 81#define JBD2_FLAG_DELETED 4 82#define JBD2_FLAG_LAST_TAG 8 83 84typedef struct journal_superblock_s 85{ 86 87 journal_header_t s_header; 88 89 __be32 s_blocksize; 90 __be32 s_maxlen; 91 __be32 s_first; 92 93 __be32 s_sequence; 94 __be32 s_start; 95 96 __be32 s_errno; 97 98 __be32 s_feature_compat; 99 __be32 s_feature_incompat; 100 __be32 s_feature_ro_compat; 101 102 __u8 s_uuid[16]; 103 104 __be32 s_nr_users; 105 106 __be32 s_dynsuper; 107 108 __be32 s_max_transaction; 109 __be32 s_max_trans_data; 110 111 __u32 s_padding[44]; 112 113 __u8 s_users[16*48]; 114 115} journal_superblock_t; 116 117#define JBD2_HAS_COMPAT_FEATURE(j,mask) ((j)->j_format_version >= 2 && ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask)))) 118#define JBD2_HAS_RO_COMPAT_FEATURE(j,mask) ((j)->j_format_version >= 2 && ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask)))) 119#define JBD2_HAS_INCOMPAT_FEATURE(j,mask) ((j)->j_format_version >= 2 && ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask)))) 120 121#define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001 122 123#define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001 124#define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002 125#define JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT 0x00000004 126 127#define JBD2_KNOWN_COMPAT_FEATURES JBD2_FEATURE_COMPAT_CHECKSUM 128#define JBD2_KNOWN_ROCOMPAT_FEATURES 0 129#define JBD2_KNOWN_INCOMPAT_FEATURES (JBD2_FEATURE_INCOMPAT_REVOKE | JBD2_FEATURE_INCOMPAT_64BIT | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT) 130 131#define BJ_None 0 132#define BJ_Metadata 1 133#define BJ_Forget 2 134#define BJ_IO 3 135#define BJ_Shadow 4 136#define BJ_LogCtl 5 137#define BJ_Reserved 6 138#define BJ_Types 7 139 140#endif 141 142