linux-kernel - [PATCH 08/13] only install new AoE device once

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri,  7 Dec 2007 12:48:06 -0500
From:	"Ed L. Cashin" <ecashin@...aid.com>
To:	linux-kernel@...r.kernel.org
Cc:	"Ed L. Cashin" <ecashin@...aid.com>, Greg KH <greg@...ah.com>
Subject: [PATCH 08/13] only install new AoE device once

An aoe driver user who had about 70 AoE targets found that he was
hitting a BUG in sysfs_create_file because the aoe driver was trying
to tell the kernel about an AoE device more than once.  Each AoE
device was reachable by several local network interfaces, and multiple
ATA device indentify responses were returning from that single device.

This patch eliminates a race condition so that aoe always informs the
block layer of a new AoE device once in the presence of multiple
incoming ATA device identify responses.

Signed-off-by: Ed L. Cashin <ecashin@...aid.com>
---
 drivers/block/aoe/aoecmd.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index b49e06e..7a96183 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -698,6 +698,8 @@ ataid_complete(struct aoedev *d, struct aoetgt *t, unsigned char *id)
 			d->fw_ver, (long long)ssize);
 	d->ssize = ssize;
 	d->geo.start = 0;
+	if (d->flags & (DEVFL_GDALLOC|DEVFL_NEWSIZE))
+		return;
 	if (d->gd != NULL) {
 		d->gd->capacity = ssize;
 		d->flags |= DEVFL_NEWSIZE;
-- 
1.5.3.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/