diff options
Diffstat (limited to 'e2fsprogs/old_e2fsprogs/ext2fs/kernel-jbd.h')
| -rw-r--r-- | e2fsprogs/old_e2fsprogs/ext2fs/kernel-jbd.h | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/kernel-jbd.h b/e2fsprogs/old_e2fsprogs/ext2fs/kernel-jbd.h deleted file mode 100644 index 853d97ac7..000000000 --- a/e2fsprogs/old_e2fsprogs/ext2fs/kernel-jbd.h +++ /dev/null @@ -1,235 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * linux/include/linux/jbd.h - * - * Written by Stephen C. Tweedie <sct@redhat.com> - * - * Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved - * - * This file is part of the Linux kernel and is made available under - * the terms of the GNU General Public License, version 2, or at your - * option, any later version, incorporated herein by reference. - * - * Definitions for transaction data structures for the buffer cache - * filesystem journaling support. - */ -#ifndef LINUX_JBD_H -#define LINUX_JBD_H 1 - -#include <sys/types.h> -#include <linux/types.h> -#include "ext2fs.h" - -/* - * Standard header for all descriptor blocks: - */ - -typedef struct journal_header_s -{ - __u32 h_magic; - __u32 h_blocktype; - __u32 h_sequence; -} journal_header_t; - -/* - * This is the global e2fsck structure. - */ -typedef struct e2fsck_struct *e2fsck_t; - - -struct inode { - e2fsck_t i_ctx; - ext2_ino_t i_ino; - struct ext2_inode i_ext2; -}; - - -/* - * The journal superblock. All fields are in big-endian byte order. - */ -typedef struct journal_superblock_s -{ -/* 0x0000 */ - journal_header_t s_header; - -/* 0x000C */ - /* 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 */ - -/* 0x0018 */ - /* 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 */ - -/* 0x0020 */ - /* Error value, as set by journal_abort(). */ - __s32 s_errno; - -/* 0x0024 */ - /* 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 */ -} journal_superblock_t; - - -extern int journal_blocks_per_page(struct inode *inode); -extern int jbd_blocks_per_page(struct inode *inode); - -#define JFS_MIN_JOURNAL_BLOCKS 1024 - - -/* - * Internal structures used by the logging mechanism: - */ - -#define JFS_MAGIC_NUMBER 0xc03b3998U /* The first 4 bytes of /dev/random! */ - -/* - * Descriptor block types: - */ - -#define JFS_DESCRIPTOR_BLOCK 1 -#define JFS_COMMIT_BLOCK 2 -#define JFS_SUPERBLOCK_V1 3 -#define JFS_SUPERBLOCK_V2 4 -#define JFS_REVOKE_BLOCK 5 - -/* - * The block tag: used to describe a single buffer in the journal - */ -typedef struct journal_block_tag_s -{ - __u32 t_blocknr; /* The on-disk block number */ - __u32 t_flags; /* See below */ -} journal_block_tag_t; - -/* - * The revoke descriptor: used on disk to describe a series of blocks to - * be revoked from the log - */ -typedef struct journal_revoke_header_s -{ - journal_header_t r_header; - int r_count; /* Count of bytes used in the block */ -} journal_revoke_header_t; - - -/* Definitions for the journal tag flags word: */ -#define JFS_FLAG_ESCAPE 1 /* on-disk block is escaped */ -#define JFS_FLAG_SAME_UUID 2 /* block has same uuid as previous */ -#define JFS_FLAG_DELETED 4 /* block deleted by this transaction */ -#define JFS_FLAG_LAST_TAG 8 /* last tag in this descriptor block */ - - - - -#define JFS_HAS_COMPAT_FEATURE(j,mask) \ - ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask)))) -#define JFS_HAS_RO_COMPAT_FEATURE(j,mask) \ - ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask)))) -#define JFS_HAS_INCOMPAT_FEATURE(j,mask) \ - ((j)->j_format_version >= 2 && \ - ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask)))) - -#define JFS_FEATURE_INCOMPAT_REVOKE 0x00000001 - -/* Features known to this kernel version: */ -#define JFS_KNOWN_COMPAT_FEATURES 0 -#define JFS_KNOWN_ROCOMPAT_FEATURES 0 -#define JFS_KNOWN_INCOMPAT_FEATURES JFS_FEATURE_INCOMPAT_REVOKE - -/* Comparison functions for transaction IDs: perform comparisons using - * modulo arithmetic so that they work over sequence number wraps. */ - - -/* - * Definitions which augment the buffer_head layer - */ - -/* journaling buffer types */ -#define BJ_None 0 /* Not journaled */ -#define BJ_SyncData 1 /* Normal data: flush before commit */ -#define BJ_AsyncData 2 /* writepage data: wait on it before commit */ -#define BJ_Metadata 3 /* Normal journaled metadata */ -#define BJ_Forget 4 /* Buffer superceded by this transaction */ -#define BJ_IO 5 /* Buffer is for temporary IO use */ -#define BJ_Shadow 6 /* Buffer contents being shadowed to the log */ -#define BJ_LogCtl 7 /* Buffer contains log descriptors */ -#define BJ_Reserved 8 /* Buffer is reserved for access by journal */ -#define BJ_Types 9 - - -struct kdev_s { - e2fsck_t k_ctx; - int k_dev; -}; - -typedef struct kdev_s *kdev_t; -typedef unsigned int tid_t; - -struct journal_s -{ - unsigned long j_flags; - int j_errno; - struct buffer_head * j_sb_buffer; - struct journal_superblock_s *j_superblock; - int j_format_version; - unsigned long j_head; - unsigned long j_tail; - unsigned long j_free; - unsigned long j_first, j_last; - kdev_t j_dev; - kdev_t j_fs_dev; - int j_blocksize; - unsigned int j_blk_offset; - unsigned int j_maxlen; - struct inode * j_inode; - tid_t j_tail_sequence; - tid_t j_transaction_sequence; - __u8 j_uuid[16]; - struct jbd_revoke_table_s *j_revoke; -}; - -typedef struct journal_s journal_t; - -extern int journal_recover (journal_t *journal); -extern int journal_skip_recovery (journal_t *); - -/* Primary revoke support */ -extern int journal_init_revoke(journal_t *, int); -extern void journal_destroy_revoke_caches(void); -extern int journal_init_revoke_caches(void); - -/* Recovery revoke support */ -extern int journal_set_revoke(journal_t *, unsigned long, tid_t); -extern int journal_test_revoke(journal_t *, unsigned long, tid_t); -extern void journal_clear_revoke(journal_t *); -extern void journal_brelse_array(struct buffer_head *b[], int n); - -extern void journal_destroy_revoke(journal_t *); - - -#endif |