📄 buf.h
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struct buf { int flags; uint dev; uint sector; struct buf *prev; // LRU cache list struct buf *next; struct buf *qnext; // disk queue uchar data[512];};#define B_BUSY 0x1 // buffer is locked by some process#define B_VALID 0x2 // buffer has been read from disk#define B_DIRTY 0x4 // buffer needs to be written to disk
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