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77 lines
3.6 KiB
C
77 lines
3.6 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS File System Recognizer
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* FILE: drivers/filesystems/fs_rec/btrfs.h
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* PURPOSE: BTRFS Header File
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* PROGRAMMER: Peter Hater
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* Pierre Schweitzer (pierre@reactos.org)
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*/
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#include <pshpack1.h>
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struct journal_params {
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// Block number of the block containing the first journal node.
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UINT32 jp_journal_1st_block; /* where does journal start from on its device */
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// Journal device number (?? for if the journal is on a separate drive ??)
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UINT32 jp_journal_dev; /* journal device st_rdev */
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// Original journal size. (Needed when using partition on systems w/ different default journal sizes).
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UINT32 jp_journal_size; /* size of the journal */
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UINT32 jp_journal_trans_max; /* max number of blocks in a transaction. */
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UINT32 jp_journal_magic; /* random value made on fs creation (this was sb_journal_block_count) */
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UINT32 jp_journal_max_batch; /* max number of blocks to batch into a trans */
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UINT32 jp_journal_max_commit_age; /* in seconds, how old can an async commit be */
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UINT32 jp_journal_max_trans_age; /* in seconds, how old can a transaction be */
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};
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typedef struct _RFSD_SUPER_BLOCK
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{
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// The number of blocks in the partition
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UINT32 s_blocks_count; /* blocks count */ //[mark] was _s_blocks_count
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// The number of free blocks in the partition
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UINT32 s_free_blocks_count; /* free blocks count */ //[mark] was _s_free_blocks
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// Block number of the block containing the root node
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UINT32 s_root_block; /* root block number */
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struct journal_params s_journal;
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// The size (in bytes) of a block
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UINT16 s_blocksize; /* block size */
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UINT16 s_oid_maxsize; /* max size of object id array, see get_objectid() commentary */
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UINT16 s_oid_cursize; /* current size of object id array */
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UINT16 s_umount_state; /* this is set to 1 when filesystem was umounted, to 2 - when not */
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char s_magic[10]; /* reiserfs magic string indicates that
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* file system is reiserfs:
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* "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" */
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// State of the partition: valid(1), error (2)
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UINT16 s_fs_state; /* it is set to used by fsck to mark which phase of rebuilding is done */
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UINT32 s_hash_function_code; /* indicate, what hash function is being use
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* to sort names in a directory*/
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UINT16 s_tree_height; /* height of disk tree */
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UINT16 s_bmap_nr; /* amount of bitmap blocks needed to address
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* each block of file system */
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// The reiserfs version number
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UINT16 s_version; /* this field is only reliable on filesystem
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* with non-standard journal */
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UINT16 s_reserved_for_journal; /* size in blocks of journal area on main
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* device, we need to keep after
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* making fs with non-standard journal */
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} RFSD_SUPER_BLOCK, *PRFSD_SUPER_BLOCK;
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#include <poppack.h>
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C_ASSERT(FIELD_OFFSET(RFSD_SUPER_BLOCK, s_blocksize) == 44);
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C_ASSERT(FIELD_OFFSET(RFSD_SUPER_BLOCK, s_magic) == 52);
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#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
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#define REISERFS_SUPER_MAGIC_STRING "ReIsErFs"
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#define REISER2FS_SUPER_MAGIC_STRING "ReIsEr2Fs"
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#define REISER2FS_JR_SUPER_MAGIC_STRING "ReIsEr3Fs"
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#define MAGIC_KEY_LENGTH 9
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