13 lines
311 B
C
13 lines
311 B
C
struct buf {
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int flags;
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uint dev;
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uint blockno;
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struct sleeplock lock;
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struct buf *prev; // LRU cache list
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struct buf *next;
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struct buf *qnext; // disk queue
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uchar data[BSIZE];
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};
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#define B_VALID 0x2 // buffer has been read from disk
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#define B_DIRTY 0x4 // buffer needs to be written to disk
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