Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752020AbeAENVq (ORCPT + 1 other); Fri, 5 Jan 2018 08:21:46 -0500 Received: from mail-wm0-f66.google.com ([74.125.82.66]:35039 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751501AbeAENQt (ORCPT ); Fri, 5 Jan 2018 08:16:49 -0500 X-Google-Smtp-Source: ACJfBosAUDg6c+IzYdpRkV6TPyvqpuoJnx2d075vKjL0S/5p44+q6ZzS+O+0q1UKzcL6uIqRmNB7ag== From: =?UTF-8?q?Matias=20Bj=C3=B8rling?= To: axboe@fb.com Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Javier=20Gonz=C3=A1lez?= , =?UTF-8?q?Matias=20Bj=C3=B8rling?= Subject: [GIT PULL 09/25] lightnvm: guarantee target unique name across devs. Date: Fri, 5 Jan 2018 14:16:05 +0100 Message-Id: <20180105131621.20808-10-m@bjorling.me> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20180105131621.20808-1-m@bjorling.me> References: <20180105131621.20808-1-m@bjorling.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: From: Javier González Until now, target unique naming is only guaranteed per device. This is ok from a lightnvm perspective, but not from a sysfs one, since groups will collide regardless of the underlying device. Check that names are unique across all lightnvm-capable devices. Signed-off-by: Javier González Signed-off-by: Matias Bjørling --- drivers/lightnvm/core.c | 33 +++++++++++++++++++++++++++------ 1 file changed, 27 insertions(+), 6 deletions(-) diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index 5c2d0f3..d5f231c 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -56,6 +56,30 @@ static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name) return NULL; } +static bool nvm_target_exists(const char *name) +{ + struct nvm_dev *dev; + struct nvm_target *tgt; + bool ret = false; + + down_write(&nvm_lock); + list_for_each_entry(dev, &nvm_devices, devices) { + mutex_lock(&dev->mlock); + list_for_each_entry(tgt, &dev->targets, list) { + if (!strcmp(name, tgt->disk->disk_name)) { + ret = true; + mutex_unlock(&dev->mlock); + goto out; + } + } + mutex_unlock(&dev->mlock); + } + +out: + up_write(&nvm_lock); + return ret; +} + static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end) { int i; @@ -259,14 +283,11 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) return -EINVAL; } - mutex_lock(&dev->mlock); - t = nvm_find_target(dev, create->tgtname); - if (t) { - pr_err("nvm: target name already exists.\n"); - mutex_unlock(&dev->mlock); + if (nvm_target_exists(create->tgtname)) { + pr_err("nvm: target name already exists (%s)\n", + create->tgtname); return -EINVAL; } - mutex_unlock(&dev->mlock); ret = nvm_reserve_luns(dev, s->lun_begin, s->lun_end); if (ret) -- 2.9.3