From bbc6090ba98c3b77572586107023420f2606027d Mon Sep 17 00:00:00 2001
From: mmex <mmex>
Date: Wed, 9 Apr 2003 17:55:41 +0000
Subject: [PATCH] Added a hp-pnnl-2.4.20 series to the kernel patchs and fixed
 up the patch files to work correctly.

---
 .../patches/dev_read_only_hp_2.4.20.patch          | 69 ++++++++++++++++++++++
 .../kernel_patches/pc/dev_read_only_hp_2.4.20.pc   |  3 +
 2 files changed, 72 insertions(+)
 create mode 100644 lustre/kernel_patches/patches/dev_read_only_hp_2.4.20.patch
 create mode 100644 lustre/kernel_patches/pc/dev_read_only_hp_2.4.20.pc

diff --git a/lustre/kernel_patches/patches/dev_read_only_hp_2.4.20.patch b/lustre/kernel_patches/patches/dev_read_only_hp_2.4.20.patch
new file mode 100644
index 0000000..e010402
--- /dev/null
+++ b/lustre/kernel_patches/patches/dev_read_only_hp_2.4.20.patch
@@ -0,0 +1,69 @@
+diff -u -r kernel-2.4.20/drivers/block/blkpg.c kernel-2.4.20-l15/drivers/block/blkpg.c
+--- kernel-2.4.20/drivers/block/blkpg.c	Fri Aug  2 17:39:43 2002
++++ kernel-2.4.20-l15drivers/block/blkpg.c	Tue Apr  8 19:40:22 2003
+@@ -296,3 +296,38 @@
+ }
+ 
+ EXPORT_SYMBOL(blk_ioctl);
++
++#define NUM_DEV_NO_WRITE 16
++static int dev_no_write[NUM_DEV_NO_WRITE];
++
++/*
++ * Debug code for turning block devices "read-only" (will discard writes
++ * silently).  This is for filesystem crash/recovery testing.
++ */
++void dev_set_rdonly(kdev_t dev, int no_write)
++{
++	if (dev) {
++		printk(KERN_WARNING "Turning device %s read-only\n",
++		       bdevname(dev));
++		dev_no_write[no_write] = 0xdead0000 + dev;
++	}
++}
++
++int dev_check_rdonly(kdev_t dev) {
++	int i;
++
++	for (i = 0; i < NUM_DEV_NO_WRITE; i++) {
++		if ((dev_no_write[i] & 0xffff0000) == 0xdead0000 &&
++		    dev == (dev_no_write[i] & 0xffff))
++			return 1;
++	}
++	return 0;
++}
++
++void dev_clear_rdonly(int no_write) {
++	dev_no_write[no_write] = 0;
++}
++
++EXPORT_SYMBOL(dev_set_rdonly);
++EXPORT_SYMBOL(dev_check_rdonly);
++EXPORT_SYMBOL(dev_clear_rdonly);
+diff -u -r kernel-2.4.20/drivers/block/loop.c kernel-2.4.20-l15/drivers/block/loop.c
+--- kernel-2.4.20/drivers/block/loop.c	Thu Nov 28 15:53:12 2002
++++ kernel-2.4.20-l15/drivers/block/loop.c	Tue Apr  8 19:40:22 2003
+@@ -474,6 +474,9 @@
+ 	spin_unlock_irq(&lo->lo_lock);
+ 
+ 	if (rw == WRITE) {
++		if (dev_check_rdonly(rbh->b_rdev))
++			goto err;
++
+ 		if (lo->lo_flags & LO_FLAGS_READ_ONLY)
+ 			goto err;
+ 	} else if (rw == READA) {
+diff -u -r kernel-2.4.20/drivers/ide/ide-disk.c kernel-2.4.20-l15/drivers/ide/ide-disk.c
+--- kernel-2.4.20/drivers/ide/ide-disk.c	Thu Nov 28 15:53:13 2002
++++ kernel-2.4.20-l15/drivers/ide/ide-disk.c	Tue Apr  8 19:42:09 2003
+@@ -558,6 +558,10 @@
+  */
+ static ide_startstop_t do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
+ {
++	if (rq->cmd == WRITE && dev_check_rdonly(rq->rq_dev)) {
++ 		ide_end_request(1, HWGROUP(drive));
++		return ide_stopped;
++	} 
+ 	if (IDE_CONTROL_REG)
+ 		OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
+ 
diff --git a/lustre/kernel_patches/pc/dev_read_only_hp_2.4.20.pc b/lustre/kernel_patches/pc/dev_read_only_hp_2.4.20.pc
new file mode 100644
index 0000000..4760ad1
--- /dev/null
+++ b/lustre/kernel_patches/pc/dev_read_only_hp_2.4.20.pc
@@ -0,0 +1,3 @@
+drivers/block/blkpg.c
+drivers/block/loop.c
+drivers/ide/ide-disk.c
-- 
1.8.3.1