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authorEd Cashin <ecashin@coraid.com>2012-10-04 17:16:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-06 03:05:26 +0900
commit6583303c5e324a918ee1d57201acd9869f3be6da (patch)
tree10e35ca5e16875475a7b721acd4a527a663a6647 /drivers/block/aoe
parent25f4d75ea45cdcc59158bfd1ae162a6ff2071124 (diff)
aoe: disallow unsupported AoE minor addresses
A guard is inserted to prevent AoE minor addresses (slot addresses) higher than 15 to be used, as they are not yet supported by the driver. There is a change coming that will allow the aoe driver to overcome this limit by using system device minor numbers dynamically, but until then, this guard prevents unexpected targets from being used by the driver when AoE targets with high minor numbers are on the AoE network. Signed-off-by: Ed Cashin <ecashin@coraid.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block/aoe')
-rw-r--r--drivers/block/aoe/aoecmd.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index e3291dfa7607..2a6a4316db00 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -1359,6 +1359,13 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
"Check shelf dip switches.\n");
return;
}
+ if (h->minor >= NPERSHELF) {
+ pr_err("aoe: e%ld.%d %s, %d\n",
+ aoemajor, h->minor,
+ "slot number larger than the maximum",
+ NPERSHELF-1);
+ return;
+ }
sysminor = SYSMINOR(aoemajor, h->minor);
if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) {