From patchwork Sun Feb 27 23:12:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Trond Myklebust X-Patchwork-Id: 12762218 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 617F2C433F5 for ; Sun, 27 Feb 2022 23:18:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232210AbiB0XTZ (ORCPT ); Sun, 27 Feb 2022 18:19:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232214AbiB0XTY (ORCPT ); Sun, 27 Feb 2022 18:19:24 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E899D22502 for ; Sun, 27 Feb 2022 15:18:46 -0800 (PST) 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 9FA4DB80B9D for ; Sun, 27 Feb 2022 23:18:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26834C340E9 for ; Sun, 27 Feb 2022 23:18:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1646003924; bh=x1tD1yPfDJ0zpUOPWu1s4QVZ2XujnA+MjnbafFTQi/E=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Z/UEnuIi+5L+r0EYhIgJt5QNi85MQmIkmYaEq4tcQ3vIhv6jQO2MjtOlSTS2qQam8 o4qvJOrr5puG0JS5BZbj/BK41nfhgd+aMQRUDrrlkotx8/5m+TSAV86s4pSJN2RUVc JrbSC77LDw//elD7ZCQp32WWLyqWD90i/tSsoFFbh/y7biPXW0/AsI6qOITJBdzweW aVvQsxwi3P84PXhyxaptgHx3kRadKEIU0Ro3/4Rv0JQxQBxX7rCuvtPm+Fov1uJpbX koWkpZSiclQB+OnOevv6KhaxnljGMP3G4Q9k81p8665kjQPna4tCIeIGlpbpZOfs0Y XaF/Fl+xROXIA== From: trondmy@kernel.org To: linux-nfs@vger.kernel.org Subject: [PATCH v9 26/27] NFS: Optimise away the previous cookie field Date: Sun, 27 Feb 2022 18:12:26 -0500 Message-Id: <20220227231227.9038-27-trondmy@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220227231227.9038-26-trondmy@kernel.org> References: <20220227231227.9038-1-trondmy@kernel.org> <20220227231227.9038-2-trondmy@kernel.org> <20220227231227.9038-3-trondmy@kernel.org> <20220227231227.9038-4-trondmy@kernel.org> <20220227231227.9038-5-trondmy@kernel.org> <20220227231227.9038-6-trondmy@kernel.org> <20220227231227.9038-7-trondmy@kernel.org> <20220227231227.9038-8-trondmy@kernel.org> <20220227231227.9038-9-trondmy@kernel.org> <20220227231227.9038-10-trondmy@kernel.org> <20220227231227.9038-11-trondmy@kernel.org> <20220227231227.9038-12-trondmy@kernel.org> <20220227231227.9038-13-trondmy@kernel.org> <20220227231227.9038-14-trondmy@kernel.org> <20220227231227.9038-15-trondmy@kernel.org> <20220227231227.9038-16-trondmy@kernel.org> <20220227231227.9038-17-trondmy@kernel.org> <20220227231227.9038-18-trondmy@kernel.org> <20220227231227.9038-19-trondmy@kernel.org> <20220227231227.9038-20-trondmy@kernel.org> <20220227231227.9038-21-trondmy@kernel.org> <20220227231227.9038-22-trondmy@kernel.org> <20220227231227.9038-23-trondmy@kernel.org> <20220227231227.9038-24-trondmy@kernel.org> <20220227231227.9038-25-trondmy@kernel.org> <20220227231227.9038-26-trondmy@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Trond Myklebust Replace the 'previous cookie' field in struct nfs_entry with the array->last_cookie. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 26 ++++++++++++++------------ fs/nfs/nfs2xdr.c | 1 - fs/nfs/nfs3xdr.c | 1 - fs/nfs/nfs4xdr.c | 1 - include/linux/nfs_xdr.h | 3 +-- 5 files changed, 15 insertions(+), 17 deletions(-) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 5a2c98b2cc15..c2c847845464 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -296,19 +296,20 @@ static int nfs_readdir_array_can_expand(struct nfs_cache_array *array) return 0; } -static -int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) +static int nfs_readdir_page_array_append(struct page *page, + const struct nfs_entry *entry, + u64 *cookie) { struct nfs_cache_array *array; struct nfs_cache_array_entry *cache_entry; const char *name; - int ret; + int ret = -ENOMEM; name = nfs_readdir_copy_name(entry->name, entry->len); - if (!name) - return -ENOMEM; array = kmap_atomic(page); + if (!name) + goto out; ret = nfs_readdir_array_can_expand(array); if (ret) { kfree(name); @@ -316,7 +317,7 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) } cache_entry = &array->array[array->size]; - cache_entry->cookie = entry->prev_cookie; + cache_entry->cookie = array->last_cookie; cache_entry->ino = entry->ino; cache_entry->d_type = entry->d_type; cache_entry->name_len = entry->len; @@ -328,6 +329,7 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (entry->eof != 0) nfs_readdir_array_set_eof(array); out: + *cookie = array->last_cookie; kunmap_atomic(array); return ret; } @@ -791,6 +793,7 @@ static int nfs_readdir_page_filler(struct nfs_readdir_descriptor *desc, struct xdr_stream stream; struct xdr_buf buf; struct page *scratch, *new, *page = *arrays; + u64 cookie; int status; scratch = alloc_page(GFP_KERNEL); @@ -812,22 +815,21 @@ static int nfs_readdir_page_filler(struct nfs_readdir_descriptor *desc, nfs_prime_dcache(file_dentry(desc->file), entry, desc->dir_verifier); - status = nfs_readdir_add_to_array(entry, page); + status = nfs_readdir_page_array_append(page, entry, &cookie); if (status != -ENOSPC) continue; if (page->mapping != mapping) { if (!--narrays) break; - new = nfs_readdir_page_array_alloc(entry->prev_cookie, - GFP_KERNEL); + new = nfs_readdir_page_array_alloc(cookie, GFP_KERNEL); if (!new) break; arrays++; *arrays = page = new; } else { - new = nfs_readdir_page_get_next( - mapping, entry->prev_cookie, change_attr); + new = nfs_readdir_page_get_next(mapping, cookie, + change_attr); if (!new) break; if (page != *arrays) @@ -835,7 +837,7 @@ static int nfs_readdir_page_filler(struct nfs_readdir_descriptor *desc, page = new; } desc->page_index_max++; - status = nfs_readdir_add_to_array(entry, page); + status = nfs_readdir_page_array_append(page, entry, &cookie); } while (!status && !entry->eof); switch (status) { diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index 3d5ba43f44bb..05c3b4b2b3dd 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -955,7 +955,6 @@ int nfs2_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, * The type (size and byte order) of nfscookie isn't defined in * RFC 1094. This implementation assumes that it's an XDR uint32. */ - entry->prev_cookie = entry->cookie; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) return -EAGAIN; diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index d6779ceeb39e..3b0b650c9c5a 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -2024,7 +2024,6 @@ int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, zero_nfs_fh3(entry->fh); } - entry->prev_cookie = entry->cookie; entry->cookie = new_cookie; return 0; diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index b7780b97dc4d..86a5f6516928 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -7508,7 +7508,6 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE) entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); - entry->prev_cookie = entry->cookie; entry->cookie = new_cookie; return 0; diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 728cb0c1f0b6..82f7c2730b9a 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -745,8 +745,7 @@ struct nfs_auth_info { */ struct nfs_entry { __u64 ino; - __u64 cookie, - prev_cookie; + __u64 cookie; const char * name; unsigned int len; int eof;