ether82563: support for i211 with iNVM. (thanks mfny and brennan for testing)

[plan9front.git] / sys / src / libbio / binit.c

diff --git a/sys/src/libbio/binit.c b/sys/src/libbio/binit.c
index 9afae5b34ad4017bf4442f363534b31f7708a5e0..13fd0f4ceb84916ec0f8ecd3ff32c45bd3a316c0 100644 (file)
--- a/sys/src/libbio/binit.c
+++ b/sys/src/libbio/binit.c
@@ -50,6 +50,18 @@ install(Biobufhdr *bp)
        }
 }
 
+static int
+bioread(Biobufhdr *bp, void *v, long n)
+{
+       return read(bp->fid, v, n);
+}
+
+static int
+biowrite(Biobufhdr *bp, void *v, long n)
+{
+       return write(bp->fid, v, n);
+}
+
 int
 Binits(Biobufhdr *bp, int f, int mode, uchar *p, int size)
 {
@@ -64,12 +76,14 @@ Binits(Biobufhdr *bp, int f, int mode, uchar *p, int size)
        case OREAD:
                bp->state = Bractive;
                bp->ocount = 0;
+               bp->iof = bioread;
                break;
 
        case OWRITE:
                install(bp);
                bp->state = Bwactive;
                bp->ocount = -size;
+               bp->iof = biowrite;
                break;
        }
        bp->bbuf = p;
@@ -154,3 +168,15 @@ Bterm(Biobufhdr *bp)
        /* otherwise opened with Binit(s) */
        return r;
 }
+
+void
+Biofn(Biobufhdr *bp, int (*f)(Biobufhdr *, void *, long))
+{
+       if(f == nil)
+               if(bp->state == Bwactive)
+                       bp->iof = biowrite;
+               else
+                       bp->iof = bioread;
+       else
+               bp->iof = f;
+}