From patchwork Tue Dec 16 19:01:44 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Haynes X-Patchwork-Id: 5503151 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 084F79F326 for ; Tue, 16 Dec 2014 19:03:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0E9C4209BD for ; Tue, 16 Dec 2014 19:03:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C609209C1 for ; Tue, 16 Dec 2014 19:03:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751312AbaLPTDZ (ORCPT ); Tue, 16 Dec 2014 14:03:25 -0500 Received: from mail-pa0-f48.google.com ([209.85.220.48]:35452 "EHLO mail-pa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751155AbaLPTDZ (ORCPT ); Tue, 16 Dec 2014 14:03:25 -0500 Received: by mail-pa0-f48.google.com with SMTP id rd3so14655313pab.21 for ; Tue, 16 Dec 2014 11:03:24 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=rVHz4J9/5NAX+/plziYyndl7C7rF+MeO8Q/D7/+9C9c=; b=dpoMFX2wjFZTPkXny+f0JoqL3hpB46ZamxuVAlUpqR6hVFZOrwSZR+qfcg+7ibZcWT F7tMRfn0HKAOHR4wDIdppeQw8xdKij7yQBklEhaoxAYy5HwGQTFtL1OH8kMxh15nLtCk bmBeH1WIcGVEP8ixH9Sl1XrwwJh3EaRkm/EgB4CLzIxKvslyAFIy3zxuuReVoJX/3igk BO+3Me6rLEiGmqWlXL5u5dwqE/FNhyOkWsbrpmxhCWhv1EpcpQfoBlfD2If5hiUVPjjY zCjfgzf/AUkwaYD0m8gsmyFwtL0GtOIz6DmY/S4qymiCmNAPnGO6Vy3Qja/XGJDhpIi9 +vlw== X-Gm-Message-State: ALoCoQke9Svr4O3BpUzA5OPhp3PlaHCjJkm26cvtg9F97AtfJ/bdcxvXXmXHebHrHBTFo+AxmGXw X-Received: by 10.68.170.130 with SMTP id am2mr62445112pbc.156.1418756604241; Tue, 16 Dec 2014 11:03:24 -0800 (PST) Received: from localhost.localdomain ([50.242.95.105]) by mx.google.com with ESMTPSA id q4sm1620669pdh.79.2014.12.16.11.03.23 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 16 Dec 2014 11:03:23 -0800 (PST) From: Tom Haynes X-Google-Original-From: Tom Haynes To: Trond Myklebust Cc: Linux NFS Mailing List Subject: [PATCH 41/50] nfs: add nfs_pgio_current_mirror helper Date: Tue, 16 Dec 2014 11:01:44 -0800 Message-Id: <1418756513-95187-42-git-send-email-loghyr@primarydata.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1418756513-95187-1-git-send-email-loghyr@primarydata.com> References: <1418756513-95187-1-git-send-email-loghyr@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Peng Tao Let it return current nfs_pgio_mirror in use depending on pg_mirror_count. For read, we always use pg_mirrors[0], so this effectively gives us freedom to use pg_mirror_idx to track the actual mirror to read from through out the IO stack. Signed-off-by: Peng Tao Signed-off-by: Tom Haynes --- fs/nfs/internal.h | 2 ++ fs/nfs/objlayout/objio_osd.c | 2 +- fs/nfs/pagelist.c | 25 +++++++++++++++++-------- fs/nfs/pnfs.c | 9 ++++----- 4 files changed, 24 insertions(+), 14 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index f7a6387..c08c09f 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -255,6 +255,8 @@ int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops, const struct rpc_call_ops *call_ops, int how, int flags); void nfs_free_request(struct nfs_page *req); +struct nfs_pgio_mirror * +nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); static inline void nfs_iocounter_init(struct nfs_io_counter *c) { diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c index 9a5f2ee..24e1d74 100644 --- a/fs/nfs/objlayout/objio_osd.c +++ b/fs/nfs/objlayout/objio_osd.c @@ -537,7 +537,7 @@ int objio_write_pagelist(struct nfs_pgio_header *hdr, int how) static size_t objio_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req) { - struct nfs_pgio_mirror *mirror = &pgio->pg_mirrors[pgio->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(pgio); unsigned int size; size = pnfs_generic_pg_test(pgio, prev, req); diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index f9d8c46..960c99f 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -42,11 +42,20 @@ static bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount) return p->pagevec != NULL; } +struct nfs_pgio_mirror * +nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc) +{ + return nfs_pgio_has_mirroring(desc) ? + &desc->pg_mirrors[desc->pg_mirror_idx] : + &desc->pg_mirrors[0]; +} +EXPORT_SYMBOL_GPL(nfs_pgio_current_mirror); + void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr, void (*release)(struct nfs_pgio_header *hdr)) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); hdr->req = nfs_list_entry(mirror->pg_list.next); @@ -485,7 +494,7 @@ nfs_wait_on_request(struct nfs_page *req) size_t nfs_generic_pg_test(struct nfs_pageio_descriptor *desc, struct nfs_page *prev, struct nfs_page *req) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); if (mirror->pg_count > mirror->pg_bsize) { @@ -782,7 +791,7 @@ static void nfs_pgio_result(struct rpc_task *task, void *calldata) int nfs_generic_pgio(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); struct nfs_page *req; struct page **pages, @@ -831,7 +840,7 @@ static int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc) struct nfs_pgio_header *hdr; int ret; - mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + mirror = nfs_pgio_current_mirror(desc); hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); if (!hdr) { @@ -961,7 +970,7 @@ static bool nfs_can_coalesce_requests(struct nfs_page *prev, static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc, struct nfs_page *req) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); struct nfs_page *prev = NULL; @@ -985,7 +994,7 @@ static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc, */ static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); if (!list_empty(&mirror->pg_list)) { @@ -1015,7 +1024,7 @@ static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc) static int __nfs_pageio_add_request(struct nfs_pageio_descriptor *desc, struct nfs_page *req) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); struct nfs_page *subreq; unsigned int bytes_left = 0; @@ -1078,7 +1087,7 @@ err_ptr: static int nfs_do_recoalesce(struct nfs_pageio_descriptor *desc) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); LIST_HEAD(head); do { diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 35465cb..732ab7a 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1738,7 +1738,7 @@ static void pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { list_splice_tail_init(&hdr->pages, &mirror->pg_list); @@ -1792,7 +1792,7 @@ EXPORT_SYMBOL_GPL(pnfs_writehdr_free); int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); struct nfs_pgio_header *hdr; int ret; @@ -1853,8 +1853,7 @@ static void pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; - + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { list_splice_tail_init(&hdr->pages, &mirror->pg_list); @@ -1910,7 +1909,7 @@ EXPORT_SYMBOL_GPL(pnfs_readhdr_free); int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) { - struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx]; + struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); struct nfs_pgio_header *hdr; int ret;