14 lines
362 B
C
14 lines
362 B
C
struct buf {
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int flags;
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uint dev;
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uint sector;
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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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int done;
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uchar data[512];
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};
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#define B_BUSY 0x1 // buffer is locked by some process
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#define B_VALID 0x2 // buffer contains the data of the sector
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#define B_WRITE 0x4 // asking device driver to write, else read
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