45 lines
1.8 KiB
C
45 lines
1.8 KiB
C
#ifndef __MFS_TYPE_H__
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#define __MFS_TYPE_H__
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/* Declaration of the V1 inode as it is on the disk (not in core). */
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typedef struct { /* V1.x disk inode */
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uint16_t d1_mode; /* file type, protection, etc. */
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int16_t d1_uid; /* user id of the file's owner */
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int32_t d1_size; /* current file size in bytes */
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int32_t d1_mtime; /* when was file data last changed */
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uint8_t d1_gid; /* group number */
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uint8_t d1_nlinks; /* how many links to this file */
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uint16_t d1_zone[V1_NR_TZONES];/* block nums for direct, ind, and dbl ind */
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} d1_inode;
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/* Declaration of the V2 inode as it is on the disk (not in core). */
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typedef struct { /* V2.x disk inode */
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uint16_t d2_mode; /* file type, protection, etc. */
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uint16_t d2_nlinks; /* how many links to this file. HACK! */
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int16_t d2_uid; /* user id of the file's owner. */
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uint16_t d2_gid; /* group number HACK! */
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int32_t d2_size; /* current file size in bytes */
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int32_t d2_atime; /* when was file data last accessed */
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int32_t d2_mtime; /* when was file data last changed */
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int32_t d2_ctime; /* when was inode data last changed */
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uint32_t d2_zone[V2_NR_TZONES];/* block nums for direct, ind, and dbl ind */
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} d2_inode;
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struct buf {
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/* Data portion of the buffer. */
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union fsdata_u *bp;
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/* Header portion of the buffer. */
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struct buf *b_next; /* used to link all free bufs in a chain */
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struct buf *b_prev; /* used to link all free bufs the other way */
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struct buf *b_hash; /* used to link bufs on hash chains */
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uint32_t b_blocknr; /* block number of its (minor) device */
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dev_t b_dev; /* major | minor device where block resides */
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char b_dirt; /* BP_CLEAN or BP_DIRTY */
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char b_count; /* number of users of this buffer */
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unsigned int b_bytes; /* Number of bytes allocated in bp */
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};
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#endif
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