From 6821bbce5f04723595ccbf68bf46252e6c252a4b Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sun, 18 Jun 2000 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2000-06-18

---
 alphapc/random.c |  4 ++--
 alphapc/sd.h     |  8 +++-----
 alphapc/sdscsi.c | 19 ++++++++++++++-----
 carrera/random.c |  4 ++--
 4 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/alphapc/random.c b/alphapc/random.c
index cf9eb1d054608a5a63c47eb48ed459b739b8a6d3..4954367f8ad4a996b0d9ee49e775103f92beb9b8 100644
--- a/alphapc/random.c
+++ b/alphapc/random.c
@@ -81,7 +81,7 @@ randomclock(void)
 		wakeup(&rb.consumer);
 }
 
-static void
+void
 randominit(void)
 {
 	addclock0link(randomclock);
@@ -93,7 +93,7 @@ randominit(void)
 /*
  *  consume random bytes from a circular buffer
  */
-static ulong
+ulong
 randomread(void *xp, ulong n)
 {
 	uchar *e, *p;
diff --git a/alphapc/sd.h b/alphapc/sd.h
index f756adcdd0fa5747d56976988709f7fcdeb3f1b0..9093a20cbfcf3d7ec945ebedfa14bd3ad6f310f1 100644
--- a/alphapc/sd.h
+++ b/alphapc/sd.h
@@ -14,7 +14,7 @@ typedef struct SDpart {
 	char	user[NAMELEN];
 	ulong	perm;
 	int	valid;
-	int	nopen;			/* of this partition */
+	ulong	vers;
 } SDpart;
 
 typedef struct SDunit {
@@ -27,10 +27,8 @@ typedef struct SDunit {
 	QLock	ctl;
 	ulong	sectors;
 	ulong	secsize;
-	SDpart*	part;
-	int	npart;			/* of valid partitions */
-	int	nopen;			/* of partitions on this unit */
-	int	changed;
+	SDpart*	part;		/* either nil or points at array of size SDnpart */
+	ulong	vers;
 
 	Lock	rawinuse;		/* really just a test-and-set */
 	int	state;
diff --git a/alphapc/sdscsi.c b/alphapc/sdscsi.c
index 1f95bb10660257e347a7f19c4a58383295290843..1a08c5428aef938d0ab297b703d5396d923d5863 100644
--- a/alphapc/sdscsi.c
+++ b/alphapc/sdscsi.c
@@ -217,6 +217,14 @@ scsionline(SDunit* unit)
 			 */
 			unit->sectors++;
 			unit->secsize = (p[4]<<24)|(p[5]<<16)|(p[6]<<8)|p[7];
+
+			/*
+			 * Some ATAPI CD readers lie about the block size.
+			 * Since we don't read audio via this interface
+			 * it's okay to always fudge this.
+			 */
+			if((unit->inquiry[0] & 0x1F) == 0x05 && unit->secsize == 2352)
+				unit->secsize = 2048;
 			ok = 1;
 			break;
 		case 1:
@@ -230,7 +238,10 @@ scsionline(SDunit* unit)
 	free(p);
 	free(r);
 
-	return ok;
+	if(ok)
+		return ok+retries;
+	else
+		return 0;
 }
 
 int
@@ -331,15 +342,13 @@ again:
 		case 0x06:		/* check condition */
 			/*
 			 * Check for a removeable media change.
-			 * If so, mark it and zap the geometry info
+			 * If so, mark it by zapping the geometry info
 			 * to force an online request.
 			 */
 			if(r->sense[12] != 0x28 || r->sense[13] != 0)
 				break;
-			if(unit->inquiry[1] & 0x80){
-				unit->changed = 1;
+			if(unit->inquiry[1] & 0x80)
 				unit->sectors = 0;
-			}
 			break;
 		case 0x02:		/* not ready */
 			/*
diff --git a/carrera/random.c b/carrera/random.c
index cf9eb1d054608a5a63c47eb48ed459b739b8a6d3..4954367f8ad4a996b0d9ee49e775103f92beb9b8 100644
--- a/carrera/random.c
+++ b/carrera/random.c
@@ -81,7 +81,7 @@ randomclock(void)
 		wakeup(&rb.consumer);
 }
 
-static void
+void
 randominit(void)
 {
 	addclock0link(randomclock);
@@ -93,7 +93,7 @@ randominit(void)
 /*
  *  consume random bytes from a circular buffer
  */
-static ulong
+ulong
 randomread(void *xp, ulong n)
 {
 	uchar *e, *p;