linux-kernel - [PATCH] aoe: ensure that AoE minor address is supported

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Message-Id: <1249650319-1646-1-git-send-email-ecashin@coraid.com>
Date:	Fri,  7 Aug 2009 09:05:19 -0400
From:	Ed Cashin <ecashin@...aid.com>
To:	linux-kernel@...r.kernel.org
Cc:	Ed Cashin <ecashin@...aid.com>
Subject: [PATCH] aoe: ensure that AoE minor address is supported

This aoe driver only supports a fixed number of AoE minor ("slot")
addresses per major ("shelf") address.  This check ensures that the
minor address is supported and clarifies the diagnostic message.

Signed-off-by: Ed Cashin <ecashin@...aid.com>
---

I plan to put this patch in the aoe quilt tree for linux-next.

 drivers/block/aoe/aoecmd.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 965ece2..437b95b 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -982,8 +982,12 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
 	}
 
 	sysminor = SYSMINOR(aoemajor, h->minor);
-	if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) {
-		printk(KERN_INFO "aoe: e%ld.%d: minor number too large\n",
+	if (h->minor >= NPERSHELF) {
+		printk(KERN_INFO "aoe: e%ld.%d: AoE minor address too large\n",
+			aoemajor, (int) h->minor);
+		return;
+	} else if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) {
+		printk(KERN_INFO "aoe: e%ld.%d: AoE major address too large\n",
 			aoemajor, (int) h->minor);
 		return;
 	}
-- 
1.5.6.5

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