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- #ifndef __KERN_FS_IOBUF_H__
- #define __KERN_FS_IOBUF_H__
-
- #include <defs.h>
-
- /*
- * iobuf is a buffer Rd/Wr status record
- */
- struct iobuf {
- void *io_base; // the base addr of buffer (used for Rd/Wr)
- off_t io_offset; // current Rd/Wr position in buffer, will have been incremented by the amount transferred
- size_t io_len; // the length of buffer (used for Rd/Wr)
- size_t io_resid; // current resident length need to Rd/Wr, will have been decremented by the amount transferred.
- };
-
- #define iobuf_used(iob) ((size_t)((iob)->io_len - (iob)->io_resid))
-
- struct iobuf *iobuf_init(struct iobuf *iob, void *base, size_t len, off_t offset);
- int iobuf_move(struct iobuf *iob, void *data, size_t len, bool m2b, size_t *copiedp);
- int iobuf_move_zeros(struct iobuf *iob, size_t len, size_t *copiedp);
- void iobuf_skip(struct iobuf *iob, size_t n);
-
- #endif /* !__KERN_FS_IOBUF_H__ */
-
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