From patchwork Thu Feb 21 00:21:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matthew Wilcox (Oracle)" X-Patchwork-Id: 10822911 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 26E551805 for ; Thu, 21 Feb 2019 00:21:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 157152FC4D for ; Thu, 21 Feb 2019 00:21:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 09CF32FC81; Thu, 21 Feb 2019 00:21:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A0CB22FC7C for ; Thu, 21 Feb 2019 00:21:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726953AbfBUAVQ (ORCPT ); Wed, 20 Feb 2019 19:21:16 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:52516 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726937AbfBUAVO (ORCPT ); Wed, 20 Feb 2019 19:21:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=aDuiHe9aWCn+0nL22jaN9ScdaaLMiWNSihu/j7khyQ0=; b=RsVfUW6kbOxehUkGlAUKIZ7f3 Q02LU81sxiY9nRXdJGE8EbTDLp7mGV35Q2FGYyNLJywz0uO96pcjarXcbtZ/uTD4s3wscj8wVKoOj 9Kun4EA+evhnXDkfV1rPIKYnu1oxi4LXg3qGVUEHMWIeouiD4T5xCJqDs+e8HS8DrWRe8pxs8lRGm XczInqmhLipy4MpTbUrUZAnnASzPolnLVm0lmRXBw0+pwnapBwLy+vv73+psp3dByyDwNJ7T4x8kK x+He5snqXis4/zWL8jlfzYiE3iw/+l2QGxLjGt+KMbBNKIBPtqp5K+ZPfdDXp78HTh/lVzvRxFaFR 9IcOC23kQ==; Received: from willy by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1gwc70-0005xo-0Z; Thu, 21 Feb 2019 00:21:14 +0000 From: Matthew Wilcox To: Jason Gunthorpe Cc: Matthew Wilcox , linux-rdma@vger.kernel.org Subject: [PATCH 29/32] ucma: Convert multicast_idr to XArray Date: Wed, 20 Feb 2019 16:21:04 -0800 Message-Id: <20190221002107.22625-30-willy@infradead.org> X-Mailer: git-send-email 2.14.5 In-Reply-To: <20190221002107.22625-1-willy@infradead.org> References: <20190221002107.22625-1-willy@infradead.org> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Matthew Wilcox --- drivers/infiniband/core/ucma.c | 26 +++++++++----------------- 1 file changed, 9 insertions(+), 17 deletions(-) diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c index 01d68ed46c1b..9a30068d4c1d 100644 --- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -124,7 +124,7 @@ struct ucma_event { static DEFINE_MUTEX(mut); static DEFINE_IDR(ctx_idr); -static DEFINE_IDR(multicast_idr); +static DEFINE_XARRAY_ALLOC(multicast_table); static const struct file_operations ucma_fops; @@ -238,10 +238,7 @@ static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) if (!mc) return NULL; - mutex_lock(&mut); - mc->id = idr_alloc(&multicast_idr, NULL, 0, 0, GFP_KERNEL); - mutex_unlock(&mut); - if (mc->id < 0) + if (xa_alloc(&multicast_table, &mc->id, NULL, xa_limit_32b, GFP_KERNEL)) goto error; mc->ctx = ctx; @@ -540,7 +537,7 @@ static void ucma_cleanup_multicast(struct ucma_context *ctx) mutex_lock(&mut); list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { list_del(&mc->list); - idr_remove(&multicast_idr, mc->id); + xa_erase(&multicast_table, mc->id); kfree(mc); } mutex_unlock(&mut); @@ -1425,9 +1422,7 @@ static ssize_t ucma_process_join(struct ucma_file *file, goto err3; } - mutex_lock(&mut); - idr_replace(&multicast_idr, mc, mc->id); - mutex_unlock(&mut); + xa_store(&multicast_table, mc->id, mc, 0); mutex_unlock(&file->mut); ucma_put_ctx(ctx); @@ -1437,9 +1432,7 @@ static ssize_t ucma_process_join(struct ucma_file *file, rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); ucma_cleanup_mc_events(mc); err2: - mutex_lock(&mut); - idr_remove(&multicast_idr, mc->id); - mutex_unlock(&mut); + xa_erase(&multicast_table, mc->id); list_del(&mc->list); kfree(mc); err1: @@ -1501,8 +1494,8 @@ static ssize_t ucma_leave_multicast(struct ucma_file *file, if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT; - mutex_lock(&mut); - mc = idr_find(&multicast_idr, cmd.id); + xa_lock(&multicast_table); + mc = xa_load(&multicast_table, cmd.id); if (!mc) mc = ERR_PTR(-ENOENT); else if (mc->ctx->file != file) @@ -1510,8 +1503,8 @@ static ssize_t ucma_leave_multicast(struct ucma_file *file, else if (!atomic_inc_not_zero(&mc->ctx->ref)) mc = ERR_PTR(-ENXIO); else - idr_remove(&multicast_idr, mc->id); - mutex_unlock(&mut); + __xa_erase(&multicast_table, mc->id); + xa_unlock(&multicast_table); if (IS_ERR(mc)) { ret = PTR_ERR(mc); @@ -1840,7 +1833,6 @@ static void __exit ucma_cleanup(void) device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); misc_deregister(&ucma_misc); idr_destroy(&ctx_idr); - idr_destroy(&multicast_idr); } module_init(ucma_init);