From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 47CC8C4332F for ; Tue, 30 Nov 2021 14:49:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=5G7H1sc6qK1T6xVw4eSbljSFc/XEykRPArWUwxgEeKE=; b=MzSc9Trc2YQJBwil5QSUXCFHvZ RZVpBjldbHPIPwKR02mghw8KYF2DeZIMTcn1EWNqGQqQW+JunapISpMXs/94evjPlaN/qmk5RqXuE Wds8ebeSzv2vNgxXjqlaejvEg/RJ7CJn8IP0y7Kv9bFQBE2gbzUrA3raIG9ghszmBiW2VTtONMrla i8Yz42QltUx+9gF5q5j3ahuykmKDIFhr55u5wOBxV/ZAwkmknvd5nncUSaBAr3FBnK5YzgUFwx8zw QnSRXoKmO9ILxd4mfgo2uU1QrGMTzOdt5PoeM5W3al9X72Nua+4M/jUrCc0B40znmso7+rqKnZvl6 ipR8/siA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ms4Rl-005gWm-Jq; Tue, 30 Nov 2021 14:49:29 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ms4RF-005gAp-34 for linux-nvme@lists.infradead.org; Tue, 30 Nov 2021 14:49:00 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id C1E14B817FA; Tue, 30 Nov 2021 14:48:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 68415C53FD1; Tue, 30 Nov 2021 14:48:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638283735; bh=IGj8oNcj1GOKAcY82z+nicBO12BRUez9IwNwAVF24Dk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T7vPBzOUBjLco+0v9j4NIKpEUxAIRFaU86jXIHoPbKWbh5NmWKkpJX3EuCTqpWipL r/8KlGS9zu/jm03N9+OT2Ciun0ifQA7jUYIvk0z7Z/WmMIKDz5LHwfg2fyLFZ1405V OQ1YouCPSzAW2kJehhhwzIhcIJHcQxB8oiGQq4PgpY9OKeJ5B8NNH/WQN4yZTjzdqH wLlxHjrL4Wfo10mEqi3OTaIt4/0a8lSsN6VJjwlT5BaNSKZeb/40sTK/0tVSnTz8G4 pRTL00TYUWL8Bvuguis6EWUXLxtMCckUl6rKNh0+4UcokmOMPpbMoqYbBIfLL2N4OD 69h7GoqQP/N8A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Maurizio Lombardi , Keith Busch , Sagi Grimberg , John Meneghini , Christoph Hellwig , Sasha Levin , kch@nvidia.com, linux-nvme@lists.infradead.org Subject: [PATCH AUTOSEL 5.15 41/68] nvmet-tcp: add an helper to free the cmd buffers Date: Tue, 30 Nov 2021 09:46:37 -0500 Message-Id: <20211130144707.944580-41-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211130144707.944580-1-sashal@kernel.org> References: <20211130144707.944580-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211130_064857_467849_DB290DFF X-CRM114-Status: GOOD ( 16.96 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Maurizio Lombardi [ Upstream commit 69b85e1f1d1d1e49601ec3e85d2031188657cca2 ] Makes the code easier to read and to debug. Sets the freed pointers to NULL, it will be useful when destroying the queues to understand if the commands' buffers have been released already or not. Signed-off-by: Maurizio Lombardi Reviewed-by: Keith Busch Reviewed-by: Sagi Grimberg Reviewed-by: John Meneghini Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin --- drivers/nvme/target/tcp.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 18f36256095f6..786b1440a9af4 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -166,6 +166,8 @@ static struct workqueue_struct *nvmet_tcp_wq; static const struct nvmet_fabrics_ops nvmet_tcp_ops; static void nvmet_tcp_free_cmd(struct nvmet_tcp_cmd *c); static void nvmet_tcp_finish_cmd(struct nvmet_tcp_cmd *cmd); +static void nvmet_tcp_free_cmd_buffers(struct nvmet_tcp_cmd *cmd); +static void nvmet_tcp_unmap_pdu_iovec(struct nvmet_tcp_cmd *cmd); static inline u16 nvmet_tcp_cmd_tag(struct nvmet_tcp_queue *queue, struct nvmet_tcp_cmd *cmd) @@ -297,6 +299,16 @@ static int nvmet_tcp_check_ddgst(struct nvmet_tcp_queue *queue, void *pdu) return 0; } +static void nvmet_tcp_free_cmd_buffers(struct nvmet_tcp_cmd *cmd) +{ + WARN_ON(unlikely(cmd->nr_mapped > 0)); + + kfree(cmd->iov); + sgl_free(cmd->req.sg); + cmd->iov = NULL; + cmd->req.sg = NULL; +} + static void nvmet_tcp_unmap_pdu_iovec(struct nvmet_tcp_cmd *cmd) { struct scatterlist *sg; @@ -306,6 +318,8 @@ static void nvmet_tcp_unmap_pdu_iovec(struct nvmet_tcp_cmd *cmd) for (i = 0; i < cmd->nr_mapped; i++) kunmap(sg_page(&sg[i])); + + cmd->nr_mapped = 0; } static void nvmet_tcp_map_pdu_iovec(struct nvmet_tcp_cmd *cmd) @@ -387,7 +401,7 @@ static int nvmet_tcp_map_data(struct nvmet_tcp_cmd *cmd) return 0; err: - sgl_free(cmd->req.sg); + nvmet_tcp_free_cmd_buffers(cmd); return NVME_SC_INTERNAL; } @@ -632,10 +646,8 @@ static int nvmet_try_send_data(struct nvmet_tcp_cmd *cmd, bool last_in_batch) } } - if (queue->nvme_sq.sqhd_disabled) { - kfree(cmd->iov); - sgl_free(cmd->req.sg); - } + if (queue->nvme_sq.sqhd_disabled) + nvmet_tcp_free_cmd_buffers(cmd); return 1; @@ -664,8 +676,7 @@ static int nvmet_try_send_response(struct nvmet_tcp_cmd *cmd, if (left) return -EAGAIN; - kfree(cmd->iov); - sgl_free(cmd->req.sg); + nvmet_tcp_free_cmd_buffers(cmd); cmd->queue->snd_cmd = NULL; nvmet_tcp_put_cmd(cmd); return 1; @@ -1406,8 +1417,7 @@ static void nvmet_tcp_finish_cmd(struct nvmet_tcp_cmd *cmd) { nvmet_req_uninit(&cmd->req); nvmet_tcp_unmap_pdu_iovec(cmd); - kfree(cmd->iov); - sgl_free(cmd->req.sg); + nvmet_tcp_free_cmd_buffers(cmd); } static void nvmet_tcp_uninit_data_in_cmds(struct nvmet_tcp_queue *queue) -- 2.33.0