From patchwork Thu Nov 3 16:16:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Wysochanski X-Patchwork-Id: 13030529 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 E98ECC4332F for ; Thu, 3 Nov 2022 16:17:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231922AbiKCQRk (ORCPT ); Thu, 3 Nov 2022 12:17:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231336AbiKCQRh (ORCPT ); Thu, 3 Nov 2022 12:17:37 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CF0EE178B8 for ; Thu, 3 Nov 2022 09:16:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1667492202; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=biF2wPuboYbeVl11E7Od6SkCaSbKavsbqQv85n0v5c8=; b=CtCMV8Gsv5gnPdBHThnq2CJHDVJoqX6joO9GFrcPvr+9jmPOU2KIoTG6AosavTN7Tt3pgd 8UQerxcW/s58S1FKfmBp6WGYROJDRpkZwLSFOyjvj93mXZXpXUyaqBIkEoSQN/rgT1zVkU HWHVhvVOwlJCNLFQSDv2WRouNDXSa94= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-1-zQZ3uCdPOTWLR47YZpmG5A-1; Thu, 03 Nov 2022 12:16:41 -0400 X-MC-Unique: zQZ3uCdPOTWLR47YZpmG5A-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 8BF2A1C05AE9; Thu, 3 Nov 2022 16:16:40 +0000 (UTC) Received: from dwysocha.rdu.csb (unknown [10.22.10.74]) by smtp.corp.redhat.com (Postfix) with ESMTPS id F0CD41402BDA; Thu, 3 Nov 2022 16:16:39 +0000 (UTC) From: Dave Wysochanski To: Anna Schumaker , Trond Myklebust , David Howells Cc: linux-nfs@vger.kernel.org, linux-cachefs@redhat.com, Benjamin Maynard , Daire Byrne Subject: [PATCH v10 1/6] NFS: Rename readpage_async_filler to nfs_read_add_page Date: Thu, 3 Nov 2022 12:16:32 -0400 Message-Id: <20221103161637.1725471-2-dwysocha@redhat.com> In-Reply-To: <20221103161637.1725471-1-dwysocha@redhat.com> References: <20221103161637.1725471-1-dwysocha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Rename readpage_async_filler to nfs_read_add_page to better reflect what this function does (add a page to the nfs_pageio_descriptor), and simplify arguments to this function by removing struct nfs_readdesc. Signed-off-by: Dave Wysochanski --- fs/nfs/read.c | 58 +++++++++++++++++++++++++-------------------------- 1 file changed, 29 insertions(+), 29 deletions(-) diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 8ae2c8d1219d..71267a3174f1 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -127,11 +127,6 @@ static void nfs_readpage_release(struct nfs_page *req, int error) nfs_release_request(req); } -struct nfs_readdesc { - struct nfs_pageio_descriptor pgio; - struct nfs_open_context *ctx; -}; - static void nfs_page_group_set_uptodate(struct nfs_page *req) { if (nfs_page_group_sync_on_bit(req, PG_UPTODATE)) @@ -153,7 +148,8 @@ static void nfs_read_completion(struct nfs_pgio_header *hdr) if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) { /* note: regions of the page not covered by a - * request are zeroed in readpage_async_filler */ + * request are zeroed in nfs_read_add_page + */ if (bytes > hdr->good_bytes) { /* nothing in this request was good, so zero * the full extent of the request */ @@ -282,7 +278,9 @@ static void nfs_readpage_result(struct rpc_task *task, } static int -readpage_async_filler(struct nfs_readdesc *desc, struct page *page) +nfs_read_add_page(struct nfs_pageio_descriptor *pgio, + struct nfs_open_context *ctx, + struct page *page) { struct inode *inode = page_file_mapping(page)->host; unsigned int rsize = NFS_SERVER(inode)->rsize; @@ -302,15 +300,15 @@ readpage_async_filler(struct nfs_readdesc *desc, struct page *page) goto out_unlock; } - new = nfs_create_request(desc->ctx, page, 0, aligned_len); + new = nfs_create_request(ctx, page, 0, aligned_len); if (IS_ERR(new)) goto out_error; if (len < PAGE_SIZE) zero_user_segment(page, len, PAGE_SIZE); - if (!nfs_pageio_add_request(&desc->pgio, new)) { + if (!nfs_pageio_add_request(pgio, new)) { nfs_list_remove_request(new); - error = desc->pgio.pg_error; + error = pgio->pg_error; nfs_readpage_release(new, error); goto out; } @@ -332,7 +330,8 @@ readpage_async_filler(struct nfs_readdesc *desc, struct page *page) int nfs_read_folio(struct file *file, struct folio *folio) { struct page *page = &folio->page; - struct nfs_readdesc desc; + struct nfs_pageio_descriptor pgio; + struct nfs_open_context *ctx; struct inode *inode = page_file_mapping(page)->host; int ret; @@ -358,29 +357,29 @@ int nfs_read_folio(struct file *file, struct folio *folio) if (file == NULL) { ret = -EBADF; - desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ); - if (desc.ctx == NULL) + ctx = nfs_find_open_context(inode, NULL, FMODE_READ); + if (ctx == NULL) goto out_unlock; } else - desc.ctx = get_nfs_open_context(nfs_file_open_context(file)); + ctx = get_nfs_open_context(nfs_file_open_context(file)); - xchg(&desc.ctx->error, 0); - nfs_pageio_init_read(&desc.pgio, inode, false, + xchg(&ctx->error, 0); + nfs_pageio_init_read(&pgio, inode, false, &nfs_async_read_completion_ops); - ret = readpage_async_filler(&desc, page); + ret = nfs_read_add_page(&pgio, ctx, page); if (ret) goto out; - nfs_pageio_complete_read(&desc.pgio); - ret = desc.pgio.pg_error < 0 ? desc.pgio.pg_error : 0; + nfs_pageio_complete_read(&pgio); + ret = pgio.pg_error < 0 ? pgio.pg_error : 0; if (!ret) { ret = wait_on_page_locked_killable(page); if (!PageUptodate(page) && !ret) - ret = xchg(&desc.ctx->error, 0); + ret = xchg(&ctx->error, 0); } out: - put_nfs_open_context(desc.ctx); + put_nfs_open_context(ctx); trace_nfs_aop_readpage_done(inode, page, ret); return ret; out_unlock: @@ -391,9 +390,10 @@ int nfs_read_folio(struct file *file, struct folio *folio) void nfs_readahead(struct readahead_control *ractl) { + struct nfs_pageio_descriptor pgio; + struct nfs_open_context *ctx; unsigned int nr_pages = readahead_count(ractl); struct file *file = ractl->file; - struct nfs_readdesc desc; struct inode *inode = ractl->mapping->host; struct page *page; int ret; @@ -407,25 +407,25 @@ void nfs_readahead(struct readahead_control *ractl) if (file == NULL) { ret = -EBADF; - desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ); - if (desc.ctx == NULL) + ctx = nfs_find_open_context(inode, NULL, FMODE_READ); + if (ctx == NULL) goto out; } else - desc.ctx = get_nfs_open_context(nfs_file_open_context(file)); + ctx = get_nfs_open_context(nfs_file_open_context(file)); - nfs_pageio_init_read(&desc.pgio, inode, false, + nfs_pageio_init_read(&pgio, inode, false, &nfs_async_read_completion_ops); while ((page = readahead_page(ractl)) != NULL) { - ret = readpage_async_filler(&desc, page); + ret = nfs_read_add_page(&pgio, ctx, page); put_page(page); if (ret) break; } - nfs_pageio_complete_read(&desc.pgio); + nfs_pageio_complete_read(&pgio); - put_nfs_open_context(desc.ctx); + put_nfs_open_context(ctx); out: trace_nfs_aop_readahead_done(inode, nr_pages, ret); } From patchwork Thu Nov 3 16:16:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Wysochanski X-Patchwork-Id: 13030532 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 45B6AC43217 for ; Thu, 3 Nov 2022 16:17:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231873AbiKCQRn (ORCPT ); Thu, 3 Nov 2022 12:17:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45596 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232027AbiKCQRm (ORCPT ); Thu, 3 Nov 2022 12:17:42 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 55352183AE for ; Thu, 3 Nov 2022 09:16:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1667492204; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=B+sfmuXq1kfHM8ElfdtLEouKFvQIlK3uznTIjlG9THY=; b=jNlk+jJ1FwQmNlQlBxKegW3rb2OUgysc3SeQJHkjqHMwAiLykCzIzmV78ZUligLtYrEvAz rl8OgHzt6XaW3/SpbK/CDOmmJ+NOd4kgxcSSSKDL/86oIZoUN64qzfOSP/5u6rivLHaoFk RqTUbX896hx6lOIZbQTmy+lamfuZrMc= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-629-eQ3eTI3wN2CB7CF4O0HVgA-1; Thu, 03 Nov 2022 12:16:41 -0400 X-MC-Unique: eQ3eTI3wN2CB7CF4O0HVgA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E527B811E75; Thu, 3 Nov 2022 16:16:40 +0000 (UTC) Received: from dwysocha.rdu.csb (unknown [10.22.10.74]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 9FB4F1415307; Thu, 3 Nov 2022 16:16:40 +0000 (UTC) From: Dave Wysochanski To: Anna Schumaker , Trond Myklebust , David Howells Cc: linux-nfs@vger.kernel.org, linux-cachefs@redhat.com, Benjamin Maynard , Daire Byrne Subject: [PATCH v10 2/6] NFS: Configure support for netfs when NFS fscache is configured Date: Thu, 3 Nov 2022 12:16:33 -0400 Message-Id: <20221103161637.1725471-3-dwysocha@redhat.com> In-Reply-To: <20221103161637.1725471-1-dwysocha@redhat.com> References: <20221103161637.1725471-1-dwysocha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org As first steps for support of the netfs library when NFS_FSCACHE is configured, add NETFS_SUPPORT to Kconfig and add the required netfs_inode into struct nfs_inode. Using netfs requires we move the VFS inode structure to be stored inside struct netfs_inode, along with the fscache_cookie. Thus, create a new helper, VFS_I(), which is defined differently depending on whether NFS_FSCACHE is configured. In addition, use the netfs_inode() and netfs_i_cookie() helpers, and remove our own helper, nfs_i_fscache(). Later patches will convert NFS fscache to fully use netfs. Signed-off-by: Dave Wysochanski Reviewed-by: Jeff Layton --- fs/nfs/Kconfig | 1 + fs/nfs/delegation.c | 2 +- fs/nfs/dir.c | 2 +- fs/nfs/fscache.c | 20 +++++++++----------- fs/nfs/fscache.h | 15 ++++++--------- fs/nfs/inode.c | 6 +++--- fs/nfs/internal.h | 2 +- fs/nfs/pnfs.c | 12 ++++++------ fs/nfs/write.c | 2 +- include/linux/nfs_fs.h | 34 +++++++++++++++++++++++----------- 10 files changed, 52 insertions(+), 44 deletions(-) diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig index 14a72224b657..8fbb6caf3481 100644 --- a/fs/nfs/Kconfig +++ b/fs/nfs/Kconfig @@ -171,6 +171,7 @@ config ROOT_NFS config NFS_FSCACHE bool "Provide NFS client caching support" depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y + select NETFS_SUPPORT help Say Y here if you want NFS data to be cached locally on disc through the general filesystem cache manager diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 5c97cad741a7..b5c492d40367 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -306,7 +306,7 @@ nfs_start_delegation_return_locked(struct nfs_inode *nfsi) } spin_unlock(&delegation->lock); if (ret) - nfs_clear_verifier_delegated(&nfsi->vfs_inode); + nfs_clear_verifier_delegated(VFS_I(nfsi)); out: return ret; } diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 58036f657126..36315ee2a248 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -2799,7 +2799,7 @@ nfs_do_access_cache_scan(unsigned int nr_to_scan) if (nr_to_scan-- == 0) break; - inode = &nfsi->vfs_inode; + inode = VFS_I(nfsi); spin_lock(&inode->i_lock); if (list_empty(&nfsi->access_cache_entry_lru)) goto remove_lru_entry; diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index e861d7bae305..a6fc1c8b6644 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -163,13 +163,14 @@ void nfs_fscache_init_inode(struct inode *inode) struct nfs_server *nfss = NFS_SERVER(inode); struct nfs_inode *nfsi = NFS_I(inode); - nfsi->fscache = NULL; + netfs_inode(inode)->cache = NULL; if (!(nfss->fscache && S_ISREG(inode->i_mode))) return; nfs_fscache_update_auxdata(&auxdata, inode); - nfsi->fscache = fscache_acquire_cookie(NFS_SB(inode->i_sb)->fscache, + netfs_inode(inode)->cache = fscache_acquire_cookie( + nfss->fscache, 0, nfsi->fh.data, /* index_key */ nfsi->fh.size, @@ -183,11 +184,8 @@ void nfs_fscache_init_inode(struct inode *inode) */ void nfs_fscache_clear_inode(struct inode *inode) { - struct nfs_inode *nfsi = NFS_I(inode); - struct fscache_cookie *cookie = nfs_i_fscache(inode); - - fscache_relinquish_cookie(cookie, false); - nfsi->fscache = NULL; + fscache_relinquish_cookie(netfs_i_cookie(&NFS_I(inode)->netfs), false); + netfs_inode(inode)->cache = NULL; } /* @@ -212,7 +210,7 @@ void nfs_fscache_clear_inode(struct inode *inode) void nfs_fscache_open_file(struct inode *inode, struct file *filp) { struct nfs_fscache_inode_auxdata auxdata; - struct fscache_cookie *cookie = nfs_i_fscache(inode); + struct fscache_cookie *cookie = netfs_i_cookie(&NFS_I(inode)->netfs); bool open_for_write = inode_is_open_for_write(inode); if (!fscache_cookie_valid(cookie)) @@ -230,7 +228,7 @@ EXPORT_SYMBOL_GPL(nfs_fscache_open_file); void nfs_fscache_release_file(struct inode *inode, struct file *filp) { struct nfs_fscache_inode_auxdata auxdata; - struct fscache_cookie *cookie = nfs_i_fscache(inode); + struct fscache_cookie *cookie = netfs_i_cookie(&NFS_I(inode)->netfs); loff_t i_size = i_size_read(inode); nfs_fscache_update_auxdata(&auxdata, inode); @@ -243,7 +241,7 @@ void nfs_fscache_release_file(struct inode *inode, struct file *filp) static int fscache_fallback_read_page(struct inode *inode, struct page *page) { struct netfs_cache_resources cres; - struct fscache_cookie *cookie = nfs_i_fscache(inode); + struct fscache_cookie *cookie = netfs_i_cookie(&NFS_I(inode)->netfs); struct iov_iter iter; struct bio_vec bvec[1]; int ret; @@ -271,7 +269,7 @@ static int fscache_fallback_write_page(struct inode *inode, struct page *page, bool no_space_allocated_yet) { struct netfs_cache_resources cres; - struct fscache_cookie *cookie = nfs_i_fscache(inode); + struct fscache_cookie *cookie = netfs_i_cookie(&NFS_I(inode)->netfs); struct iov_iter iter; struct bio_vec bvec[1]; loff_t start = page_offset(page); diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index 2a37af880978..38614ed8f951 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -54,7 +54,7 @@ static inline bool nfs_fscache_release_folio(struct folio *folio, gfp_t gfp) if (current_is_kswapd() || !(gfp & __GFP_FS)) return false; folio_wait_fscache(folio); - fscache_note_page_release(nfs_i_fscache(folio->mapping->host)); + fscache_note_page_release(netfs_i_cookie(&NFS_I(folio->mapping->host)->netfs)); nfs_inc_fscache_stats(folio->mapping->host, NFSIOS_FSCACHE_PAGES_UNCACHED); } @@ -66,7 +66,7 @@ static inline bool nfs_fscache_release_folio(struct folio *folio, gfp_t gfp) */ static inline int nfs_fscache_read_page(struct inode *inode, struct page *page) { - if (nfs_i_fscache(inode)) + if (netfs_inode(inode)->cache) return __nfs_fscache_read_page(inode, page); return -ENOBUFS; } @@ -78,7 +78,7 @@ static inline int nfs_fscache_read_page(struct inode *inode, struct page *page) static inline void nfs_fscache_write_page(struct inode *inode, struct page *page) { - if (nfs_i_fscache(inode)) + if (netfs_inode(inode)->cache) __nfs_fscache_write_page(inode, page); } @@ -101,13 +101,10 @@ static inline void nfs_fscache_update_auxdata(struct nfs_fscache_inode_auxdata * static inline void nfs_fscache_invalidate(struct inode *inode, int flags) { struct nfs_fscache_inode_auxdata auxdata; - struct nfs_inode *nfsi = NFS_I(inode); + struct fscache_cookie *cookie = netfs_i_cookie(&NFS_I(inode)->netfs); - if (nfsi->fscache) { - nfs_fscache_update_auxdata(&auxdata, inode); - fscache_invalidate(nfsi->fscache, &auxdata, - i_size_read(inode), flags); - } + nfs_fscache_update_auxdata(&auxdata, inode); + fscache_invalidate(cookie, &auxdata, i_size_read(inode), flags); } /* diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 6b2cfa59a1a2..acc0f5899577 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1407,7 +1407,7 @@ int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) static bool nfs_file_has_writers(struct nfs_inode *nfsi) { - struct inode *inode = &nfsi->vfs_inode; + struct inode *inode = VFS_I(nfsi); if (!S_ISREG(inode->i_mode)) return false; @@ -2245,7 +2245,7 @@ struct inode *nfs_alloc_inode(struct super_block *sb) #ifdef CONFIG_NFS_V4_2 nfsi->xattr_cache = NULL; #endif - return &nfsi->vfs_inode; + return VFS_I(nfsi); } EXPORT_SYMBOL_GPL(nfs_alloc_inode); @@ -2269,7 +2269,7 @@ static void init_once(void *foo) { struct nfs_inode *nfsi = foo; - inode_init_once(&nfsi->vfs_inode); + inode_init_once(VFS_I(nfsi)); INIT_LIST_HEAD(&nfsi->open_files); INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index d914d609b85b..13ea6d42d26f 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -355,7 +355,7 @@ nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) { - if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) + if (nfs_server_capable(VFS_I(nfsi), NFS_CAP_SECURITY_LABEL)) nfsi->cache_validity |= NFS_INO_INVALID_LABEL; } #else diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index a5db5158c634..d55648ae5101 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -766,19 +766,19 @@ static struct pnfs_layout_hdr *__pnfs_destroy_layout(struct nfs_inode *nfsi) struct pnfs_layout_hdr *lo; LIST_HEAD(tmp_list); - spin_lock(&nfsi->vfs_inode.i_lock); + spin_lock(&VFS_I(nfsi)->i_lock); lo = nfsi->layout; if (lo) { pnfs_get_layout_hdr(lo); pnfs_mark_layout_stateid_invalid(lo, &tmp_list); pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); - spin_unlock(&nfsi->vfs_inode.i_lock); + spin_unlock(&VFS_I(nfsi)->i_lock); pnfs_free_lseg_list(&tmp_list); - nfs_commit_inode(&nfsi->vfs_inode, 0); + nfs_commit_inode(VFS_I(nfsi), 0); pnfs_put_layout_hdr(lo); } else - spin_unlock(&nfsi->vfs_inode.i_lock); + spin_unlock(&VFS_I(nfsi)->i_lock); return lo; } @@ -793,9 +793,9 @@ static bool pnfs_layout_removed(struct nfs_inode *nfsi, { bool ret; - spin_lock(&nfsi->vfs_inode.i_lock); + spin_lock(&VFS_I(nfsi)->i_lock); ret = nfsi->layout != lo; - spin_unlock(&nfsi->vfs_inode.i_lock); + spin_unlock(&VFS_I(nfsi)->i_lock); return ret; } diff --git a/fs/nfs/write.c b/fs/nfs/write.c index f41d24b54fd1..911569022036 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -828,7 +828,7 @@ nfs_page_search_commits_for_head_request_locked(struct nfs_inode *nfsi, { struct nfs_page *freq, *t; struct nfs_commit_info cinfo; - struct inode *inode = &nfsi->vfs_inode; + struct inode *inode = VFS_I(nfsi); nfs_init_cinfo_from_inode(&cinfo, inode); diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index 7931fa472561..a1c402e26abf 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -31,6 +31,10 @@ #include #include +#ifdef CONFIG_NFS_FSCACHE +#include +#endif + #include #include #include @@ -204,9 +208,11 @@ struct nfs_inode { __u64 write_io; __u64 read_io; #ifdef CONFIG_NFS_FSCACHE - struct fscache_cookie *fscache; -#endif + struct netfs_inode netfs; /* netfs context and VFS inode */ +#else struct inode vfs_inode; +#endif + #ifdef CONFIG_NFS_V4_2 struct nfs4_xattr_cache *xattr_cache; @@ -281,10 +287,25 @@ struct nfs4_copy_state { #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ #define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ +#ifdef CONFIG_NFS_FSCACHE +static inline struct inode *VFS_I(struct nfs_inode *nfsi) +{ + return &nfsi->netfs.inode; +} +static inline struct nfs_inode *NFS_I(const struct inode *inode) +{ + return container_of(inode, struct nfs_inode, netfs.inode); +} +#else +static inline struct inode *VFS_I(struct nfs_inode *nfsi) +{ + return &nfsi->vfs_inode; +} static inline struct nfs_inode *NFS_I(const struct inode *inode) { return container_of(inode, struct nfs_inode, vfs_inode); } +#endif static inline struct nfs_server *NFS_SB(const struct super_block *s) { @@ -328,15 +349,6 @@ static inline int NFS_STALE(const struct inode *inode) return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); } -static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) -{ -#ifdef CONFIG_NFS_FSCACHE - return NFS_I(inode)->fscache; -#else - return NULL; -#endif -} - static inline __u64 NFS_FILEID(const struct inode *inode) { return NFS_I(inode)->fileid; From patchwork Thu Nov 3 16:16:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Wysochanski X-Patchwork-Id: 13030530 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 2A75FC433FE for ; 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Thu, 03 Nov 2022 12:16:41 -0400 X-MC-Unique: MxLI7KYwM0qcfpseng2L5g-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 4312E85A5B6; Thu, 3 Nov 2022 16:16:41 +0000 (UTC) Received: from dwysocha.rdu.csb (unknown [10.22.10.74]) by smtp.corp.redhat.com (Postfix) with ESMTPS id F17B21415139; Thu, 3 Nov 2022 16:16:40 +0000 (UTC) From: Dave Wysochanski To: Anna Schumaker , Trond Myklebust , David Howells Cc: linux-nfs@vger.kernel.org, linux-cachefs@redhat.com, Benjamin Maynard , Daire Byrne Subject: [PATCH v10 3/6] NFS: Convert buffered read paths to use netfs when fscache is enabled Date: Thu, 3 Nov 2022 12:16:34 -0400 Message-Id: <20221103161637.1725471-4-dwysocha@redhat.com> In-Reply-To: <20221103161637.1725471-1-dwysocha@redhat.com> References: <20221103161637.1725471-1-dwysocha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Convert the NFS buffered read code paths to corresponding netfs APIs, but only when fscache is configured and enabled. The netfs API defines struct netfs_request_ops which must be filled in by the network filesystem. For NFS, we only need to define 5 of the functions, the main one being the issue_read() function. The issue_read() function is called by the netfs layer when a read cannot be fulfilled locally, and must be sent to the server (either the cache is not active, or it is active but the data is not available). Once the read from the server is complete, netfs requires a call to netfs_subreq_terminated() which conveys either how many bytes were read successfully, or an error. Note that issue_read() is called with a structure, netfs_io_subrequest, which defines the IO requested, and contains a start and a length (both in bytes), and assumes the underlying netfs will return a either an error on the whole region, or the number of bytes successfully read. The NFS IO path is page based and the main APIs are the pgio APIs defined in pagelist.c. For the pgio APIs, there is no way for the caller to know how many RPCs will be sent and how the pages will be broken up into underlying RPCs, each of which will have their own completion and return code. In contrast, netfs is subrequest based, a single subrequest may contain multiple pages, and a single subrequest is initiated with issue_read() and terminated with netfs_subreq_terminated(). Thus, to utilze the netfs APIs, NFS needs some way to accommodate the netfs API requirement on the single response to the whole subrequest, while also minimizing disruptive changes to the NFS pgio layer. The approach taken with this patch is to allocate a small structure for each nfs_netfs_issue_read() call, store the final error and number of bytes successfully transferred in the structure, and update these values as each RPC completes. The refcount on the structure is used as a marker for the last RPC completion, is incremented in nfs_netfs_read_initiate(), and decremented inside nfs_netfs_read_completion(), when a nfs_pgio_header contains a valid pointer to the data. On the final put (which signals the final outstanding RPC is complete) in nfs_netfs_read_completion(), call netfs_subreq_terminated() with either the final error value (if one or more READs complete with an error) or the number of bytes successfully transferred (if all RPCs complete successfully). Note that when all RPCs complete successfully, the number of bytes transferred is capped to the length of the subrequest. Capping the transferred length to the subrequest length prevents "Subreq overread" warnings from netfs. This is due to the "aligned_len" in nfs_pageio_add_page(), and the corner case where NFS requests a full page at the end of the file, even when i_size reflects only a partial page (NFS overread). Signed-off-by: Dave Wysochanski --- fs/nfs/fscache.c | 232 +++++++++++++++++++++++---------------- fs/nfs/fscache.h | 122 ++++++++++++++------ fs/nfs/inode.c | 2 + fs/nfs/internal.h | 9 ++ fs/nfs/pagelist.c | 4 + fs/nfs/read.c | 52 +++++---- include/linux/nfs_page.h | 3 + include/linux/nfs_xdr.h | 3 + 8 files changed, 273 insertions(+), 154 deletions(-) diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index a6fc1c8b6644..8dac02d05f70 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -15,6 +15,9 @@ #include #include #include +#include +#include +#include #include "internal.h" #include "iostat.h" @@ -184,7 +187,7 @@ void nfs_fscache_init_inode(struct inode *inode) */ void nfs_fscache_clear_inode(struct inode *inode) { - fscache_relinquish_cookie(netfs_i_cookie(&NFS_I(inode)->netfs), false); + fscache_relinquish_cookie(netfs_i_cookie(netfs_inode(inode)), false); netfs_inode(inode)->cache = NULL; } @@ -210,7 +213,7 @@ void nfs_fscache_clear_inode(struct inode *inode) void nfs_fscache_open_file(struct inode *inode, struct file *filp) { struct nfs_fscache_inode_auxdata auxdata; - struct fscache_cookie *cookie = netfs_i_cookie(&NFS_I(inode)->netfs); + struct fscache_cookie *cookie = netfs_i_cookie(netfs_inode(inode)); bool open_for_write = inode_is_open_for_write(inode); if (!fscache_cookie_valid(cookie)) @@ -228,119 +231,160 @@ EXPORT_SYMBOL_GPL(nfs_fscache_open_file); void nfs_fscache_release_file(struct inode *inode, struct file *filp) { struct nfs_fscache_inode_auxdata auxdata; - struct fscache_cookie *cookie = netfs_i_cookie(&NFS_I(inode)->netfs); + struct fscache_cookie *cookie = netfs_i_cookie(netfs_inode(inode)); loff_t i_size = i_size_read(inode); nfs_fscache_update_auxdata(&auxdata, inode); fscache_unuse_cookie(cookie, &auxdata, &i_size); } -/* - * Fallback page reading interface. - */ -static int fscache_fallback_read_page(struct inode *inode, struct page *page) +int nfs_netfs_read_folio(struct file *file, struct folio *folio) { - struct netfs_cache_resources cres; - struct fscache_cookie *cookie = netfs_i_cookie(&NFS_I(inode)->netfs); - struct iov_iter iter; - struct bio_vec bvec[1]; - int ret; - - memset(&cres, 0, sizeof(cres)); - bvec[0].bv_page = page; - bvec[0].bv_offset = 0; - bvec[0].bv_len = PAGE_SIZE; - iov_iter_bvec(&iter, READ, bvec, ARRAY_SIZE(bvec), PAGE_SIZE); - - ret = fscache_begin_read_operation(&cres, cookie); - if (ret < 0) - return ret; - - ret = fscache_read(&cres, page_offset(page), &iter, NETFS_READ_HOLE_FAIL, - NULL, NULL); - fscache_end_operation(&cres); - return ret; + if (!netfs_inode(folio_inode(folio))->cache) + return -ENOBUFS; + + return netfs_read_folio(file, folio); } -/* - * Fallback page writing interface. - */ -static int fscache_fallback_write_page(struct inode *inode, struct page *page, - bool no_space_allocated_yet) +int nfs_netfs_readahead(struct readahead_control *ractl) { - struct netfs_cache_resources cres; - struct fscache_cookie *cookie = netfs_i_cookie(&NFS_I(inode)->netfs); - struct iov_iter iter; - struct bio_vec bvec[1]; - loff_t start = page_offset(page); - size_t len = PAGE_SIZE; - int ret; - - memset(&cres, 0, sizeof(cres)); - bvec[0].bv_page = page; - bvec[0].bv_offset = 0; - bvec[0].bv_len = PAGE_SIZE; - iov_iter_bvec(&iter, WRITE, bvec, ARRAY_SIZE(bvec), PAGE_SIZE); - - ret = fscache_begin_write_operation(&cres, cookie); - if (ret < 0) - return ret; - - ret = cres.ops->prepare_write(&cres, &start, &len, i_size_read(inode), - no_space_allocated_yet); - if (ret == 0) - ret = fscache_write(&cres, page_offset(page), &iter, NULL, NULL); - fscache_end_operation(&cres); - return ret; + struct inode *inode = ractl->mapping->host; + + if (!netfs_inode(inode)->cache) + return -ENOBUFS; + + netfs_readahead(ractl); + return 0; } -/* - * Retrieve a page from fscache - */ -int __nfs_fscache_read_page(struct inode *inode, struct page *page) +atomic_t nfs_netfs_debug_id; +static int nfs_netfs_init_request(struct netfs_io_request *rreq, struct file *file) { - int ret; + rreq->netfs_priv = get_nfs_open_context(nfs_file_open_context(file)); + rreq->debug_id = atomic_inc_return(&nfs_netfs_debug_id); - trace_nfs_fscache_read_page(inode, page); - if (PageChecked(page)) { - ClearPageChecked(page); - ret = 1; - goto out; - } + return 0; +} - ret = fscache_fallback_read_page(inode, page); - if (ret < 0) { - nfs_inc_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_READ_FAIL); - SetPageChecked(page); - goto out; - } +static void nfs_netfs_free_request(struct netfs_io_request *rreq) +{ + put_nfs_open_context(rreq->netfs_priv); +} - /* Read completed synchronously */ - nfs_inc_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_READ_OK); - SetPageUptodate(page); - ret = 0; -out: - trace_nfs_fscache_read_page_exit(inode, page, ret); - return ret; +static inline int nfs_netfs_begin_cache_operation(struct netfs_io_request *rreq) +{ + return fscache_begin_read_operation(&rreq->cache_resources, + netfs_i_cookie(netfs_inode(rreq->inode))); } -/* - * Store a newly fetched page in fscache. We can be certain there's no page - * stored in the cache as yet otherwise we would've read it from there. - */ -void __nfs_fscache_write_page(struct inode *inode, struct page *page) +static struct nfs_netfs_io_data *nfs_netfs_alloc(struct netfs_io_subrequest *sreq) { - int ret; + struct nfs_netfs_io_data *netfs; + + netfs = kzalloc(sizeof(*netfs), GFP_KERNEL_ACCOUNT); + if (!netfs) + return NULL; + netfs->sreq = sreq; + refcount_set(&netfs->refcount, 1); + return netfs; +} - trace_nfs_fscache_write_page(inode, page); +static bool nfs_netfs_clamp_length(struct netfs_io_subrequest *sreq) +{ + size_t rsize = NFS_SB(sreq->rreq->inode->i_sb)->rsize; - ret = fscache_fallback_write_page(inode, page, true); + sreq->len = min(sreq->len, rsize); + return true; +} - if (ret != 0) { - nfs_inc_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_WRITTEN_FAIL); - nfs_inc_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_UNCACHED); - } else { - nfs_inc_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_WRITTEN_OK); +static void nfs_netfs_issue_read(struct netfs_io_subrequest *sreq) +{ + struct nfs_netfs_io_data *netfs; + struct nfs_pageio_descriptor pgio; + struct inode *inode = sreq->rreq->inode; + struct nfs_open_context *ctx = sreq->rreq->netfs_priv; + struct page *page; + int err; + pgoff_t start = (sreq->start + sreq->transferred) >> PAGE_SHIFT; + pgoff_t last = ((sreq->start + sreq->len - + sreq->transferred - 1) >> PAGE_SHIFT); + XA_STATE(xas, &sreq->rreq->mapping->i_pages, start); + + nfs_pageio_init_read(&pgio, inode, false, + &nfs_async_read_completion_ops); + + netfs = nfs_netfs_alloc(sreq); + if (!netfs) + return netfs_subreq_terminated(sreq, -ENOMEM, false); + + pgio.pg_netfs = netfs; /* used in completion */ + + xas_lock(&xas); + xas_for_each(&xas, page, last) { + /* nfs_read_add_page() may schedule() due to pNFS layout and other RPCs */ + xas_pause(&xas); + xas_unlock(&xas); + err = nfs_read_add_page(&pgio, ctx, page); + if (err < 0) { + netfs->error = err; + goto out; + } + xas_lock(&xas); } - trace_nfs_fscache_write_page_exit(inode, page, ret); + xas_unlock(&xas); +out: + nfs_pageio_complete_read(&pgio); + nfs_netfs_put(netfs); +} + +void nfs_netfs_initiate_read(struct nfs_pgio_header *hdr) +{ + struct nfs_netfs_io_data *netfs = hdr->netfs; + + if (!netfs) + return; + + nfs_netfs_get(netfs); +} + +void nfs_netfs_readpage_release(struct nfs_page *req) +{ + struct inode *inode = d_inode(nfs_req_openctx(req)->dentry); + + /* + * If fscache is enabled, netfs will unlock pages. + */ + if (netfs_inode(inode)->cache) + return; + + unlock_page(req->wb_page); } + +void nfs_netfs_read_completion(struct nfs_pgio_header *hdr) +{ + struct nfs_netfs_io_data *netfs = hdr->netfs; + struct netfs_io_subrequest *sreq; + + if (!netfs) + return; + + sreq = netfs->sreq; + if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) + __set_bit(NETFS_SREQ_CLEAR_TAIL, &sreq->flags); + + if (hdr->error) + netfs->error = hdr->error; + else + atomic64_add(hdr->res.count, &netfs->transferred); + + nfs_netfs_put(netfs); + hdr->netfs = NULL; +} + +const struct netfs_request_ops nfs_netfs_ops = { + .init_request = nfs_netfs_init_request, + .free_request = nfs_netfs_free_request, + .begin_cache_operation = nfs_netfs_begin_cache_operation, + .issue_read = nfs_netfs_issue_read, + .clamp_length = nfs_netfs_clamp_length +}; diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index 38614ed8f951..18da26157fda 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -34,6 +34,58 @@ struct nfs_fscache_inode_auxdata { u64 change_attr; }; +struct nfs_netfs_io_data { + /* + * NFS may split a netfs_io_subrequest into multiple RPCs, each + * with their own read completion. In netfs, we can only call + * netfs_subreq_terminated() once for each subrequest. Use the + * refcount here to double as a marker of the last RPC completion, + * and only call netfs via netfs_subreq_terminated() once. + */ + refcount_t refcount; + struct netfs_io_subrequest *sreq; + + /* + * Final disposition of the netfs_io_subrequest, sent in + * netfs_subreq_terminated() + */ + atomic64_t transferred; + int error; +}; + +static inline void nfs_netfs_get(struct nfs_netfs_io_data *netfs) +{ + refcount_inc(&netfs->refcount); +} + +static inline void nfs_netfs_put(struct nfs_netfs_io_data *netfs) +{ + ssize_t final_len; + + /* Only the last RPC completion should call netfs_subreq_terminated() */ + if (!refcount_dec_and_test(&netfs->refcount)) + return; + + /* + * The NFS pageio interface may read a complete page, even when netfs + * only asked for a partial page. Specifically, this may be seen when + * one thread is truncating a file while another one is reading the last + * page of the file. + * Correct the final length here to be no larger than the netfs subrequest + * length, and prevent netfs from complain throwing "Subreq overread". + */ + final_len = min_t(s64, netfs->sreq->len, atomic64_read(&netfs->transferred)); + netfs_subreq_terminated(netfs->sreq, netfs->error ?: final_len, false); + kfree(netfs); +} +static inline void nfs_netfs_inode_init(struct nfs_inode *nfsi) +{ + netfs_inode_init(&nfsi->netfs, &nfs_netfs_ops); +} +extern void nfs_netfs_initiate_read(struct nfs_pgio_header *hdr); +extern void nfs_netfs_read_completion(struct nfs_pgio_header *hdr); +extern void nfs_netfs_readpage_release(struct nfs_page *req); + /* * fscache.c */ @@ -44,9 +96,8 @@ extern void nfs_fscache_init_inode(struct inode *); extern void nfs_fscache_clear_inode(struct inode *); extern void nfs_fscache_open_file(struct inode *, struct file *); extern void nfs_fscache_release_file(struct inode *, struct file *); - -extern int __nfs_fscache_read_page(struct inode *, struct page *); -extern void __nfs_fscache_write_page(struct inode *, struct page *); +extern int nfs_netfs_readahead(struct readahead_control *ractl); +extern int nfs_netfs_read_folio(struct file *file, struct folio *folio); static inline bool nfs_fscache_release_folio(struct folio *folio, gfp_t gfp) { @@ -54,34 +105,11 @@ static inline bool nfs_fscache_release_folio(struct folio *folio, gfp_t gfp) if (current_is_kswapd() || !(gfp & __GFP_FS)) return false; folio_wait_fscache(folio); - fscache_note_page_release(netfs_i_cookie(&NFS_I(folio->mapping->host)->netfs)); - nfs_inc_fscache_stats(folio->mapping->host, - NFSIOS_FSCACHE_PAGES_UNCACHED); } + fscache_note_page_release(netfs_i_cookie(&NFS_I(folio->mapping->host)->netfs)); return true; } -/* - * Retrieve a page from an inode data storage object. - */ -static inline int nfs_fscache_read_page(struct inode *inode, struct page *page) -{ - if (netfs_inode(inode)->cache) - return __nfs_fscache_read_page(inode, page); - return -ENOBUFS; -} - -/* - * Store a page newly fetched from the server in an inode data storage object - * in the cache. - */ -static inline void nfs_fscache_write_page(struct inode *inode, - struct page *page) -{ - if (netfs_inode(inode)->cache) - __nfs_fscache_write_page(inode, page); -} - static inline void nfs_fscache_update_auxdata(struct nfs_fscache_inode_auxdata *auxdata, struct inode *inode) { @@ -117,7 +145,28 @@ static inline const char *nfs_server_fscache_state(struct nfs_server *server) return "no "; } +static inline void nfs_netfs_set_pgio_header(struct nfs_pgio_header *hdr, + struct nfs_pageio_descriptor *desc) +{ + hdr->netfs = desc->pg_netfs; +} +static inline void nfs_netfs_set_pageio_descriptor(struct nfs_pageio_descriptor *desc, + struct nfs_pgio_header *hdr) +{ + desc->pg_netfs = hdr->netfs; +} +static inline void nfs_netfs_reset_pageio_descriptor(struct nfs_pageio_descriptor *desc) +{ + desc->pg_netfs = NULL; +} #else /* CONFIG_NFS_FSCACHE */ +static inline void nfs_netfs_inode_init(struct nfs_inode *nfsi) {} +static inline void nfs_netfs_initiate_read(struct nfs_pgio_header *hdr) {} +static inline void nfs_netfs_read_completion(struct nfs_pgio_header *hdr) {} +static inline void nfs_netfs_readpage_release(struct nfs_page *req) +{ + unlock_page(req->wb_page); +} static inline void nfs_fscache_release_super_cookie(struct super_block *sb) {} static inline void nfs_fscache_init_inode(struct inode *inode) {} @@ -125,22 +174,29 @@ static inline void nfs_fscache_clear_inode(struct inode *inode) {} static inline void nfs_fscache_open_file(struct inode *inode, struct file *filp) {} static inline void nfs_fscache_release_file(struct inode *inode, struct file *file) {} - -static inline bool nfs_fscache_release_folio(struct folio *folio, gfp_t gfp) +static inline int nfs_netfs_readahead(struct readahead_control *ractl) { - return true; /* may release folio */ + return -ENOBUFS; } -static inline int nfs_fscache_read_page(struct inode *inode, struct page *page) +static inline int nfs_netfs_read_folio(struct file *file, struct folio *folio) { return -ENOBUFS; } -static inline void nfs_fscache_write_page(struct inode *inode, struct page *page) {} + +static inline bool nfs_fscache_release_folio(struct folio *folio, gfp_t gfp) +{ + return true; /* may release folio */ +} static inline void nfs_fscache_invalidate(struct inode *inode, int flags) {} static inline const char *nfs_server_fscache_state(struct nfs_server *server) { return "no "; } - +static inline void nfs_netfs_set_pgio_header(struct nfs_pgio_header *hdr, + struct nfs_pageio_descriptor *desc) {} +static inline void nfs_netfs_set_pageio_descriptor(struct nfs_pageio_descriptor *desc, + struct nfs_pgio_header *hdr) {} +static inline void nfs_netfs_reset_pageio_descriptor(struct nfs_pageio_descriptor *desc) {} #endif /* CONFIG_NFS_FSCACHE */ #endif /* _NFS_FSCACHE_H */ diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index acc0f5899577..116ae689a490 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -2245,6 +2245,8 @@ struct inode *nfs_alloc_inode(struct super_block *sb) #ifdef CONFIG_NFS_V4_2 nfsi->xattr_cache = NULL; #endif + nfs_netfs_inode_init(nfsi); + return VFS_I(nfsi); } EXPORT_SYMBOL_GPL(nfs_alloc_inode); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 13ea6d42d26f..6dd6d114406b 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -452,6 +452,10 @@ extern void nfs_sb_deactive(struct super_block *sb); extern int nfs_client_for_each_server(struct nfs_client *clp, int (*fn)(struct nfs_server *, void *), void *data); +#ifdef CONFIG_NFS_FSCACHE +extern const struct netfs_request_ops nfs_netfs_ops; +#endif + /* io.c */ extern void nfs_start_io_read(struct inode *inode); extern void nfs_end_io_read(struct inode *inode); @@ -481,9 +485,14 @@ extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool struct nfs_pgio_completion_ops; /* read.c */ +extern const struct nfs_pgio_completion_ops nfs_async_read_completion_ops; extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode, bool force_mds, const struct nfs_pgio_completion_ops *compl_ops); +extern int nfs_read_add_page(struct nfs_pageio_descriptor *pgio, + struct nfs_open_context *ctx, + struct page *page); +extern void nfs_pageio_complete_read(struct nfs_pageio_descriptor *pgio); extern void nfs_read_prepare(struct rpc_task *task, void *calldata); extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 317cedfa52bf..870a7a8f299e 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -25,6 +25,7 @@ #include "internal.h" #include "pnfs.h" #include "nfstrace.h" +#include "fscache.h" #define NFSDBG_FACILITY NFSDBG_PAGECACHE @@ -68,6 +69,7 @@ void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, hdr->good_bytes = mirror->pg_count; hdr->io_completion = desc->pg_io_completion; hdr->dreq = desc->pg_dreq; + nfs_netfs_set_pgio_header(hdr, desc); hdr->release = release; hdr->completion_ops = desc->pg_completion_ops; if (hdr->completion_ops->init_hdr) @@ -846,6 +848,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc, desc->pg_lseg = NULL; desc->pg_io_completion = NULL; desc->pg_dreq = NULL; + nfs_netfs_reset_pageio_descriptor(desc); desc->pg_bsize = bsize; desc->pg_mirror_count = 1; @@ -1360,6 +1363,7 @@ int nfs_pageio_resend(struct nfs_pageio_descriptor *desc, desc->pg_io_completion = hdr->io_completion; desc->pg_dreq = hdr->dreq; + nfs_netfs_set_pageio_descriptor(desc, hdr); list_splice_init(&hdr->pages, &pages); while (!list_empty(&pages)) { struct nfs_page *req = nfs_list_entry(pages.next); diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 71267a3174f1..bede5dea0671 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -30,7 +30,7 @@ #define NFSDBG_FACILITY NFSDBG_PAGECACHE -static const struct nfs_pgio_completion_ops nfs_async_read_completion_ops; +const struct nfs_pgio_completion_ops nfs_async_read_completion_ops; static const struct nfs_rw_ops nfs_rw_read_ops; static struct kmem_cache *nfs_rdata_cachep; @@ -74,7 +74,7 @@ void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, } EXPORT_SYMBOL_GPL(nfs_pageio_init_read); -static void nfs_pageio_complete_read(struct nfs_pageio_descriptor *pgio) +void nfs_pageio_complete_read(struct nfs_pageio_descriptor *pgio) { struct nfs_pgio_mirror *pgm; unsigned long npages; @@ -110,20 +110,13 @@ EXPORT_SYMBOL_GPL(nfs_pageio_reset_read_mds); static void nfs_readpage_release(struct nfs_page *req, int error) { - struct inode *inode = d_inode(nfs_req_openctx(req)->dentry); struct page *page = req->wb_page; - dprintk("NFS: read done (%s/%llu %d@%lld)\n", inode->i_sb->s_id, - (unsigned long long)NFS_FILEID(inode), req->wb_bytes, - (long long)req_offset(req)); - if (nfs_error_is_fatal_on_server(error) && error != -ETIMEDOUT) SetPageError(page); - if (nfs_page_group_sync_on_bit(req, PG_UNLOCKPAGE)) { - if (PageUptodate(page)) - nfs_fscache_write_page(inode, page); - unlock_page(page); - } + if (nfs_page_group_sync_on_bit(req, PG_UNLOCKPAGE)) + nfs_netfs_readpage_release(req); + nfs_release_request(req); } @@ -177,6 +170,8 @@ static void nfs_read_completion(struct nfs_pgio_header *hdr) nfs_list_remove_request(req); nfs_readpage_release(req, error); } + nfs_netfs_read_completion(hdr); + out: hdr->release(hdr); } @@ -187,6 +182,7 @@ static void nfs_initiate_read(struct nfs_pgio_header *hdr, struct rpc_task_setup *task_setup_data, int how) { rpc_ops->read_setup(hdr, msg); + nfs_netfs_initiate_read(hdr); trace_nfs_initiate_read(hdr); } @@ -202,7 +198,7 @@ nfs_async_read_error(struct list_head *head, int error) } } -static const struct nfs_pgio_completion_ops nfs_async_read_completion_ops = { +const struct nfs_pgio_completion_ops nfs_async_read_completion_ops = { .error_cleanup = nfs_async_read_error, .completion = nfs_read_completion, }; @@ -277,7 +273,7 @@ static void nfs_readpage_result(struct rpc_task *task, nfs_readpage_retry(task, hdr); } -static int +int nfs_read_add_page(struct nfs_pageio_descriptor *pgio, struct nfs_open_context *ctx, struct page *page) @@ -294,12 +290,6 @@ nfs_read_add_page(struct nfs_pageio_descriptor *pgio, aligned_len = min_t(unsigned int, ALIGN(len, rsize), PAGE_SIZE); - if (!IS_SYNC(page->mapping->host)) { - error = nfs_fscache_read_page(page->mapping->host, page); - if (error == 0) - goto out_unlock; - } - new = nfs_create_request(ctx, page, 0, aligned_len); if (IS_ERR(new)) goto out_error; @@ -315,8 +305,6 @@ nfs_read_add_page(struct nfs_pageio_descriptor *pgio, return 0; out_error: error = PTR_ERR(new); -out_unlock: - unlock_page(page); out: return error; } @@ -355,6 +343,10 @@ int nfs_read_folio(struct file *file, struct folio *folio) if (NFS_STALE(inode)) goto out_unlock; + ret = nfs_netfs_read_folio(file, folio); + if (!ret) + goto out; + if (file == NULL) { ret = -EBADF; ctx = nfs_find_open_context(inode, NULL, FMODE_READ); @@ -368,8 +360,10 @@ int nfs_read_folio(struct file *file, struct folio *folio) &nfs_async_read_completion_ops); ret = nfs_read_add_page(&pgio, ctx, page); - if (ret) - goto out; + if (ret) { + put_nfs_open_context(ctx); + goto out_unlock; + } nfs_pageio_complete_read(&pgio); ret = pgio.pg_error < 0 ? pgio.pg_error : 0; @@ -378,12 +372,12 @@ int nfs_read_folio(struct file *file, struct folio *folio) if (!PageUptodate(page) && !ret) ret = xchg(&ctx->error, 0); } -out: put_nfs_open_context(ctx); - trace_nfs_aop_readpage_done(inode, page, ret); - return ret; + goto out; + out_unlock: unlock_page(page); +out: trace_nfs_aop_readpage_done(inode, page, ret); return ret; } @@ -405,6 +399,10 @@ void nfs_readahead(struct readahead_control *ractl) if (NFS_STALE(inode)) goto out; + ret = nfs_netfs_readahead(ractl); + if (!ret) + goto out; + if (file == NULL) { ret = -EBADF; ctx = nfs_find_open_context(inode, NULL, FMODE_READ); diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h index ba7e2e4b0926..8eeb16d9bacd 100644 --- a/include/linux/nfs_page.h +++ b/include/linux/nfs_page.h @@ -101,6 +101,9 @@ struct nfs_pageio_descriptor { struct pnfs_layout_segment *pg_lseg; struct nfs_io_completion *pg_io_completion; struct nfs_direct_req *pg_dreq; +#ifdef CONFIG_NFS_FSCACHE + void *pg_netfs; +#endif unsigned int pg_bsize; /* default bsize for mirrors */ u32 pg_mirror_count; diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index e86cf6642d21..e196ef595908 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1619,6 +1619,9 @@ struct nfs_pgio_header { const struct nfs_rw_ops *rw_ops; struct nfs_io_completion *io_completion; struct nfs_direct_req *dreq; +#ifdef CONFIG_NFS_FSCACHE + void *netfs; +#endif int pnfs_error; int error; /* merge with pnfs_error */ From patchwork Thu Nov 3 16:16:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Wysochanski X-Patchwork-Id: 13030535 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 AC382C43217 for ; Thu, 3 Nov 2022 16:17:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230072AbiKCQRv (ORCPT ); Thu, 3 Nov 2022 12:17:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45606 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231625AbiKCQRt (ORCPT ); Thu, 3 Nov 2022 12:17:49 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 223AC636A for ; 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Thu, 3 Nov 2022 16:16:41 +0000 (UTC) Received: from dwysocha.rdu.csb (unknown [10.22.10.74]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4DC801402BDA; Thu, 3 Nov 2022 16:16:41 +0000 (UTC) From: Dave Wysochanski To: Anna Schumaker , Trond Myklebust , David Howells Cc: linux-nfs@vger.kernel.org, linux-cachefs@redhat.com, Benjamin Maynard , Daire Byrne Subject: [PATCH v10 4/6] NFS: Remove all NFSIOS_FSCACHE counters due to conversion to netfs API Date: Thu, 3 Nov 2022 12:16:35 -0400 Message-Id: <20221103161637.1725471-5-dwysocha@redhat.com> In-Reply-To: <20221103161637.1725471-1-dwysocha@redhat.com> References: <20221103161637.1725471-1-dwysocha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org The old NFSIOS_FSCACHE counters are no longer accurate or useful with the conversion to the new netfs API. The new API does not have a page based interface, and so the counters in nfs_stat_fscachecounters are no longer obtainable. The new netfs the API has extensive statistics inside /proc/fs/fscache/stats so we no longer need NFS specific fscache stats. Note this also removes the 'fsc:' line from /proc/self/mountstats so it will be a user-visible change. Signed-off-by: Dave Wysochanski Reviewed-by: Jeff Layton --- fs/nfs/iostat.h | 17 ----------------- fs/nfs/super.c | 11 ----------- include/linux/nfs_iostat.h | 12 ------------ 3 files changed, 40 deletions(-) diff --git a/fs/nfs/iostat.h b/fs/nfs/iostat.h index 2ddaab1ac653..5aa776b5a3e7 100644 --- a/fs/nfs/iostat.h +++ b/fs/nfs/iostat.h @@ -17,9 +17,6 @@ struct nfs_iostats { unsigned long long bytes[__NFSIOS_BYTESMAX]; -#ifdef CONFIG_NFS_FSCACHE - unsigned long long fscache[__NFSIOS_FSCACHEMAX]; -#endif unsigned long events[__NFSIOS_COUNTSMAX]; } ____cacheline_aligned; @@ -49,20 +46,6 @@ static inline void nfs_add_stats(const struct inode *inode, nfs_add_server_stats(NFS_SERVER(inode), stat, addend); } -#ifdef CONFIG_NFS_FSCACHE -static inline void nfs_add_fscache_stats(struct inode *inode, - enum nfs_stat_fscachecounters stat, - long addend) -{ - this_cpu_add(NFS_SERVER(inode)->io_stats->fscache[stat], addend); -} -static inline void nfs_inc_fscache_stats(struct inode *inode, - enum nfs_stat_fscachecounters stat) -{ - this_cpu_inc(NFS_SERVER(inode)->io_stats->fscache[stat]); -} -#endif - static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void) { return alloc_percpu(struct nfs_iostats); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index ee66ffdb985e..302148258ff1 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -692,10 +692,6 @@ int nfs_show_stats(struct seq_file *m, struct dentry *root) totals.events[i] += stats->events[i]; for (i = 0; i < __NFSIOS_BYTESMAX; i++) totals.bytes[i] += stats->bytes[i]; -#ifdef CONFIG_NFS_FSCACHE - for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) - totals.fscache[i] += stats->fscache[i]; -#endif preempt_enable(); } @@ -706,13 +702,6 @@ int nfs_show_stats(struct seq_file *m, struct dentry *root) seq_puts(m, "\n\tbytes:\t"); for (i = 0; i < __NFSIOS_BYTESMAX; i++) seq_printf(m, "%Lu ", totals.bytes[i]); -#ifdef CONFIG_NFS_FSCACHE - if (nfss->options & NFS_OPTION_FSCACHE) { - seq_puts(m, "\n\tfsc:\t"); - for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) - seq_printf(m, "%Lu ", totals.fscache[i]); - } -#endif seq_putc(m, '\n'); rpc_clnt_show_stats(m, nfss->client); diff --git a/include/linux/nfs_iostat.h b/include/linux/nfs_iostat.h index 027874c36c88..8d946089d151 100644 --- a/include/linux/nfs_iostat.h +++ b/include/linux/nfs_iostat.h @@ -119,16 +119,4 @@ enum nfs_stat_eventcounters { __NFSIOS_COUNTSMAX, }; -/* - * NFS local caching servicing counters - */ -enum nfs_stat_fscachecounters { - NFSIOS_FSCACHE_PAGES_READ_OK, - NFSIOS_FSCACHE_PAGES_READ_FAIL, - NFSIOS_FSCACHE_PAGES_WRITTEN_OK, - NFSIOS_FSCACHE_PAGES_WRITTEN_FAIL, - NFSIOS_FSCACHE_PAGES_UNCACHED, - __NFSIOS_FSCACHEMAX, -}; - #endif /* _LINUX_NFS_IOSTAT */ From patchwork Thu Nov 3 16:16:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Wysochanski X-Patchwork-Id: 13030533 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 7AC89C433FE for ; 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Thu, 03 Nov 2022 12:16:42 -0400 X-MC-Unique: SjEvcLOxO_aCh_5fx9Tv9w-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id D7D67101A528; Thu, 3 Nov 2022 16:16:41 +0000 (UTC) Received: from dwysocha.rdu.csb (unknown [10.22.10.74]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 98C561402BDA; Thu, 3 Nov 2022 16:16:41 +0000 (UTC) From: Dave Wysochanski To: Anna Schumaker , Trond Myklebust , David Howells Cc: linux-nfs@vger.kernel.org, linux-cachefs@redhat.com, Benjamin Maynard , Daire Byrne Subject: [PATCH v10 5/6] NFS: Remove fscache specific trace points and NFS_INO_FSCACHE bit Date: Thu, 3 Nov 2022 12:16:36 -0400 Message-Id: <20221103161637.1725471-6-dwysocha@redhat.com> In-Reply-To: <20221103161637.1725471-1-dwysocha@redhat.com> References: <20221103161637.1725471-1-dwysocha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org The NFS specific trace points are no longer needed as tracing is well covered by netfs and fscache. Signed-off-by: Dave Wysochanski Reviewed-by: Jeff Layton --- fs/nfs/nfstrace.h | 91 ------------------------------------------ include/linux/nfs_fs.h | 1 - 2 files changed, 92 deletions(-) diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h index 8c6cc58679ff..6b56abe49ec2 100644 --- a/fs/nfs/nfstrace.h +++ b/fs/nfs/nfstrace.h @@ -39,7 +39,6 @@ { BIT(NFS_INO_STALE), "STALE" }, \ { BIT(NFS_INO_ACL_LRU_SET), "ACL_LRU_SET" }, \ { BIT(NFS_INO_INVALIDATING), "INVALIDATING" }, \ - { BIT(NFS_INO_FSCACHE), "FSCACHE" }, \ { BIT(NFS_INO_LAYOUTCOMMIT), "NEED_LAYOUTCOMMIT" }, \ { BIT(NFS_INO_LAYOUTCOMMITTING), "LAYOUTCOMMIT" }, \ { BIT(NFS_INO_LAYOUTSTATS), "LAYOUTSTATS" }, \ @@ -1213,96 +1212,6 @@ TRACE_EVENT(nfs_readpage_short, ) ); -DECLARE_EVENT_CLASS(nfs_fscache_page_event, - TP_PROTO( - const struct inode *inode, - struct page *page - ), - - TP_ARGS(inode, page), - - TP_STRUCT__entry( - __field(dev_t, dev) - __field(u32, fhandle) - __field(u64, fileid) - __field(loff_t, offset) - ), - - TP_fast_assign( - const struct nfs_inode *nfsi = NFS_I(inode); - const struct nfs_fh *fh = &nfsi->fh; - - __entry->offset = page_index(page) << PAGE_SHIFT; - __entry->dev = inode->i_sb->s_dev; - __entry->fileid = nfsi->fileid; - __entry->fhandle = nfs_fhandle_hash(fh); - ), - - TP_printk( - "fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld", - MAJOR(__entry->dev), MINOR(__entry->dev), - (unsigned long long)__entry->fileid, - __entry->fhandle, - (long long)__entry->offset - ) -); -DECLARE_EVENT_CLASS(nfs_fscache_page_event_done, - TP_PROTO( - const struct inode *inode, - struct page *page, - int error - ), - - TP_ARGS(inode, page, error), - - TP_STRUCT__entry( - __field(int, error) - __field(dev_t, dev) - __field(u32, fhandle) - __field(u64, fileid) - __field(loff_t, offset) - ), - - TP_fast_assign( - const struct nfs_inode *nfsi = NFS_I(inode); - const struct nfs_fh *fh = &nfsi->fh; - - __entry->offset = page_index(page) << PAGE_SHIFT; - __entry->dev = inode->i_sb->s_dev; - __entry->fileid = nfsi->fileid; - __entry->fhandle = nfs_fhandle_hash(fh); - __entry->error = error; - ), - - TP_printk( - "fileid=%02x:%02x:%llu fhandle=0x%08x " - "offset=%lld error=%d", - MAJOR(__entry->dev), MINOR(__entry->dev), - (unsigned long long)__entry->fileid, - __entry->fhandle, - (long long)__entry->offset, __entry->error - ) -); -#define DEFINE_NFS_FSCACHE_PAGE_EVENT(name) \ - DEFINE_EVENT(nfs_fscache_page_event, name, \ - TP_PROTO( \ - const struct inode *inode, \ - struct page *page \ - ), \ - TP_ARGS(inode, page)) -#define DEFINE_NFS_FSCACHE_PAGE_EVENT_DONE(name) \ - DEFINE_EVENT(nfs_fscache_page_event_done, name, \ - TP_PROTO( \ - const struct inode *inode, \ - struct page *page, \ - int error \ - ), \ - TP_ARGS(inode, page, error)) -DEFINE_NFS_FSCACHE_PAGE_EVENT(nfs_fscache_read_page); -DEFINE_NFS_FSCACHE_PAGE_EVENT_DONE(nfs_fscache_read_page_exit); -DEFINE_NFS_FSCACHE_PAGE_EVENT(nfs_fscache_write_page); -DEFINE_NFS_FSCACHE_PAGE_EVENT_DONE(nfs_fscache_write_page_exit); TRACE_EVENT(nfs_pgio_error, TP_PROTO( diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index a1c402e26abf..0150a5673419 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -281,7 +281,6 @@ struct nfs4_copy_state { #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ #define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ #define NFS_INO_PRESERVE_UNLINKED (4) /* preserve file if removed while open */ -#define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ From patchwork Thu Nov 3 16:16:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Wysochanski X-Patchwork-Id: 13030534 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 0522BC433FE for ; Thu, 3 Nov 2022 16:17:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230348AbiKCQRt (ORCPT ); Thu, 3 Nov 2022 12:17:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230513AbiKCQRs (ORCPT ); Thu, 3 Nov 2022 12:17:48 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3487418B32 for ; Thu, 3 Nov 2022 09:16:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; 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Thu, 3 Nov 2022 16:16:42 +0000 (UTC) Received: from dwysocha.rdu.csb (unknown [10.22.10.74]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E38F61402BDA; Thu, 3 Nov 2022 16:16:41 +0000 (UTC) From: Dave Wysochanski To: Anna Schumaker , Trond Myklebust , David Howells Cc: linux-nfs@vger.kernel.org, linux-cachefs@redhat.com, Benjamin Maynard , Daire Byrne Subject: [RFC PATCH v10 6/6] netfs: Change netfs_inode_init to allocate memory to allow opt-in Date: Thu, 3 Nov 2022 12:16:37 -0400 Message-Id: <20221103161637.1725471-7-dwysocha@redhat.com> In-Reply-To: <20221103161637.1725471-1-dwysocha@redhat.com> References: <20221103161637.1725471-1-dwysocha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Reduce the memory footprint for non-netfs enabled mounts by changing the netfs_inode structure to contain a "struct inode" and a pointer to the rest of the netfs data, which is now inside a new structure "netfs_info". This keeps the memory footprint equal to the previous footprint inside a network filesystems inode structure when fscache was enabled (a struct inode, plus a pointer). This saves memory for network filesystems inode that would build in netfs support, but like to opt-in to netfs on some mounts while opting-out of netfs on other mounts. FIXME: call netfs_inode_free() as needed (afs, ceph, etc) FIXME: Check setting of remote_i_size Signed-off-by: Dave Wysochanski --- fs/9p/cache.c | 2 +- fs/9p/vfs_inode.c | 17 +++++++---------- fs/afs/dynroot.c | 7 ++++++- fs/afs/inode.c | 14 ++------------ fs/afs/internal.h | 2 +- fs/afs/super.c | 7 +++++++ fs/afs/write.c | 2 +- fs/ceph/inode.c | 6 +++++- fs/netfs/buffered_read.c | 16 ++++++++-------- fs/netfs/internal.h | 2 +- fs/netfs/objects.c | 2 +- fs/nfs/fscache.c | 12 ++++++------ fs/nfs/fscache.h | 11 ++++++++--- fs/nfs/inode.c | 9 ++++++++- include/linux/netfs.h | 41 +++++++++++++++++++++++++++++----------- 15 files changed, 92 insertions(+), 58 deletions(-) diff --git a/fs/9p/cache.c b/fs/9p/cache.c index cebba4eaa0b5..9940ab8383c9 100644 --- a/fs/9p/cache.c +++ b/fs/9p/cache.c @@ -62,7 +62,7 @@ void v9fs_cache_inode_get_cookie(struct inode *inode) version = cpu_to_le32(v9inode->qid.version); path = cpu_to_le64(v9inode->qid.path); v9ses = v9fs_inode2v9ses(inode); - v9inode->netfs.cache = + v9inode->netfs.info->cache = fscache_acquire_cookie(v9fs_session_cache(v9ses), 0, &path, sizeof(path), diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 4d1a4a8d9277..4219882d58eb 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -227,10 +227,16 @@ v9fs_blank_wstat(struct p9_wstat *wstat) struct inode *v9fs_alloc_inode(struct super_block *sb) { struct v9fs_inode *v9inode; + int ret; v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); if (!v9inode) return NULL; + ret = netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); + if (ret) { + kmem_cache_free(v9fs_inode_cache, v9inode); + return NULL; + } v9inode->writeback_fid = NULL; v9inode->cache_validity = 0; mutex_init(&v9inode->v_mutex); @@ -244,18 +250,10 @@ struct inode *v9fs_alloc_inode(struct super_block *sb) void v9fs_free_inode(struct inode *inode) { + netfs_inode_free(&V9FS_I(inode)->netfs); kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); } -/* - * Set parameters for the netfs library - */ -static void v9fs_set_netfs_context(struct inode *inode) -{ - struct v9fs_inode *v9inode = V9FS_I(inode); - netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); -} - int v9fs_init_inode(struct v9fs_session_info *v9ses, struct inode *inode, umode_t mode, dev_t rdev) { @@ -345,7 +343,6 @@ int v9fs_init_inode(struct v9fs_session_info *v9ses, goto error; } - v9fs_set_netfs_context(inode); error: return err; diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c index d7d9402ff718..6006c1210d47 100644 --- a/fs/afs/dynroot.c +++ b/fs/afs/dynroot.c @@ -48,6 +48,7 @@ struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root) struct afs_vnode *vnode; struct inode *inode; struct afs_fid fid = {}; + int ret; _enter(""); @@ -76,7 +77,11 @@ struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root) /* there shouldn't be an existing inode */ BUG_ON(!(inode->i_state & I_NEW)); - netfs_inode_init(&vnode->netfs, NULL); + ret = netfs_inode_init(&vnode->netfs, NULL); + if (ret) { + _leave("= %d", ret); + return ERR_PTR(ret); + } inode->i_size = 0; inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; if (root) { diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 6d3a3dbe4928..a69683f1c213 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -53,14 +53,6 @@ static noinline void dump_vnode(struct afs_vnode *vnode, struct afs_vnode *paren dump_stack(); } -/* - * Set parameters for the netfs library - */ -static void afs_set_netfs_context(struct afs_vnode *vnode) -{ - netfs_inode_init(&vnode->netfs, &afs_req_ops); -} - /* * Initialise an inode from the vnode status. */ @@ -138,7 +130,6 @@ static int afs_inode_init_from_status(struct afs_operation *op, } afs_set_i_size(vnode, status->size); - afs_set_netfs_context(vnode); vnode->invalid_before = status->data_version; inode_set_iversion_raw(&vnode->netfs.inode, status->data_version); @@ -248,7 +239,7 @@ static void afs_apply_status(struct afs_operation *op, * idea of what the size should be that's not the same as * what's on the server. */ - vnode->netfs.remote_i_size = status->size; + vnode->netfs.info->remote_i_size = status->size; if (change_size) { afs_set_i_size(vnode, status->size); inode->i_ctime = t; @@ -432,7 +423,7 @@ static void afs_get_inode_cache(struct afs_vnode *vnode) struct afs_vnode_cache_aux aux; if (vnode->status.type != AFS_FTYPE_FILE) { - vnode->netfs.cache = NULL; + vnode->netfs.info->cache = NULL; return; } @@ -542,7 +533,6 @@ struct inode *afs_root_iget(struct super_block *sb, struct key *key) vnode = AFS_FS_I(inode); vnode->cb_v_break = as->volume->cb_v_break, - afs_set_netfs_context(vnode); op = afs_alloc_operation(key, as->volume); if (IS_ERR(op)) { diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 723d162078a3..141b8458d989 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -679,7 +679,7 @@ static inline void afs_vnode_set_cache(struct afs_vnode *vnode, struct fscache_cookie *cookie) { #ifdef CONFIG_AFS_FSCACHE - vnode->netfs.cache = cookie; + vnode->netfs.info->cache = cookie; #endif } diff --git a/fs/afs/super.c b/fs/afs/super.c index 95d713074dc8..d0ff1349a17e 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -678,11 +678,17 @@ static void afs_i_init_once(void *_vnode) static struct inode *afs_alloc_inode(struct super_block *sb) { struct afs_vnode *vnode; + int ret; vnode = alloc_inode_sb(sb, afs_inode_cachep, GFP_KERNEL); if (!vnode) return NULL; + ret = netfs_inode_init(&vnode->netfs, &afs_req_ops); + if (ret) { + afs_free_inode(AFS_VNODE_TO_I(vnode)); + return NULL; + } atomic_inc(&afs_count_active_inodes); /* Reset anything that shouldn't leak from one inode to the next. */ @@ -706,6 +712,7 @@ static struct inode *afs_alloc_inode(struct super_block *sb) static void afs_free_inode(struct inode *inode) { + netfs_inode_free(&AFS_FS_I(inode)->netfs); kmem_cache_free(afs_inode_cachep, AFS_FS_I(inode)); } diff --git a/fs/afs/write.c b/fs/afs/write.c index 9ebdd36eaf2f..983924427edf 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -384,7 +384,7 @@ static int afs_store_data(struct afs_vnode *vnode, struct iov_iter *iter, loff_t op->store.write_iter = iter; op->store.pos = pos; op->store.size = size; - op->store.i_size = max(pos + size, vnode->netfs.remote_i_size); + op->store.i_size = max(pos + size, vnode->netfs.info->remote_i_size); op->store.laundering = laundering; op->mtime = vnode->netfs.inode.i_mtime; op->flags |= AFS_OPERATION_UNINTR; diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 4af5e55abc15..a6ca69591c93 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -452,6 +452,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb) { struct ceph_inode_info *ci; int i; + int ret; ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS); if (!ci) @@ -460,7 +461,9 @@ struct inode *ceph_alloc_inode(struct super_block *sb) dout("alloc_inode %p\n", &ci->netfs.inode); /* Set parameters for the netfs library */ - netfs_inode_init(&ci->netfs, &ceph_netfs_ops); + ret = netfs_inode_init(&ci->netfs, &ceph_netfs_ops); + if (ret) + return NULL; spin_lock_init(&ci->i_ceph_lock); @@ -554,6 +557,7 @@ void ceph_free_inode(struct inode *inode) { struct ceph_inode_info *ci = ceph_inode(inode); + netfs_inode_free(&ceph_inode(inode)->netfs); kfree(ci->i_symlink); kmem_cache_free(ceph_inode_cachep, ci); } diff --git a/fs/netfs/buffered_read.c b/fs/netfs/buffered_read.c index 0ce535852151..3a75d3784adc 100644 --- a/fs/netfs/buffered_read.c +++ b/fs/netfs/buffered_read.c @@ -170,8 +170,8 @@ void netfs_readahead(struct readahead_control *ractl) if (IS_ERR(rreq)) return; - if (ctx->ops->begin_cache_operation) { - ret = ctx->ops->begin_cache_operation(rreq); + if (ctx->info->ops->begin_cache_operation) { + ret = ctx->info->ops->begin_cache_operation(rreq); if (ret == -ENOMEM || ret == -EINTR || ret == -ERESTARTSYS) goto cleanup_free; } @@ -228,8 +228,8 @@ int netfs_read_folio(struct file *file, struct folio *folio) goto alloc_error; } - if (ctx->ops->begin_cache_operation) { - ret = ctx->ops->begin_cache_operation(rreq); + if (ctx->info->ops->begin_cache_operation) { + ret = ctx->info->ops->begin_cache_operation(rreq); if (ret == -ENOMEM || ret == -EINTR || ret == -ERESTARTSYS) goto discard; } @@ -347,9 +347,9 @@ int netfs_write_begin(struct netfs_inode *ctx, if (!folio) return -ENOMEM; - if (ctx->ops->check_write_begin) { + if (ctx->info->ops->check_write_begin) { /* Allow the netfs (eg. ceph) to flush conflicts. */ - ret = ctx->ops->check_write_begin(file, pos, len, &folio, _fsdata); + ret = ctx->info->ops->check_write_begin(file, pos, len, &folio, _fsdata); if (ret < 0) { trace_netfs_failure(NULL, NULL, ret, netfs_fail_check_write_begin); goto error; @@ -381,8 +381,8 @@ int netfs_write_begin(struct netfs_inode *ctx, rreq->no_unlock_folio = folio_index(folio); __set_bit(NETFS_RREQ_NO_UNLOCK_FOLIO, &rreq->flags); - if (ctx->ops->begin_cache_operation) { - ret = ctx->ops->begin_cache_operation(rreq); + if (ctx->info->ops->begin_cache_operation) { + ret = ctx->info->ops->begin_cache_operation(rreq); if (ret == -ENOMEM || ret == -EINTR || ret == -ERESTARTSYS) goto error_put; } diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h index 43fac1b14e40..be3c8388812d 100644 --- a/fs/netfs/internal.h +++ b/fs/netfs/internal.h @@ -94,7 +94,7 @@ static inline void netfs_stat_d(atomic_t *stat) static inline bool netfs_is_cache_enabled(struct netfs_inode *ctx) { #if IS_ENABLED(CONFIG_FSCACHE) - struct fscache_cookie *cookie = ctx->cache; + struct fscache_cookie *cookie = ctx->info->cache; return fscache_cookie_valid(cookie) && cookie->cache_priv && fscache_cookie_enabled(cookie); diff --git a/fs/netfs/objects.c b/fs/netfs/objects.c index e17cdf53f6a7..a1bcec71686f 100644 --- a/fs/netfs/objects.c +++ b/fs/netfs/objects.c @@ -29,7 +29,7 @@ struct netfs_io_request *netfs_alloc_request(struct address_space *mapping, rreq->start = start; rreq->len = len; rreq->origin = origin; - rreq->netfs_ops = ctx->ops; + rreq->netfs_ops = ctx->info->ops; rreq->mapping = mapping; rreq->inode = inode; rreq->i_size = i_size_read(inode); diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index 8dac02d05f70..e873332a9e43 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -166,13 +166,13 @@ void nfs_fscache_init_inode(struct inode *inode) struct nfs_server *nfss = NFS_SERVER(inode); struct nfs_inode *nfsi = NFS_I(inode); - netfs_inode(inode)->cache = NULL; + netfs_inode(inode)->info->cache = NULL; if (!(nfss->fscache && S_ISREG(inode->i_mode))) return; nfs_fscache_update_auxdata(&auxdata, inode); - netfs_inode(inode)->cache = fscache_acquire_cookie( + netfs_inode(inode)->info->cache = fscache_acquire_cookie( nfss->fscache, 0, nfsi->fh.data, /* index_key */ @@ -188,7 +188,7 @@ void nfs_fscache_init_inode(struct inode *inode) void nfs_fscache_clear_inode(struct inode *inode) { fscache_relinquish_cookie(netfs_i_cookie(netfs_inode(inode)), false); - netfs_inode(inode)->cache = NULL; + netfs_inode(inode)->info->cache = NULL; } /* @@ -240,7 +240,7 @@ void nfs_fscache_release_file(struct inode *inode, struct file *filp) int nfs_netfs_read_folio(struct file *file, struct folio *folio) { - if (!netfs_inode(folio_inode(folio))->cache) + if (!netfs_inode(folio_inode(folio))->info->cache) return -ENOBUFS; return netfs_read_folio(file, folio); @@ -250,7 +250,7 @@ int nfs_netfs_readahead(struct readahead_control *ractl) { struct inode *inode = ractl->mapping->host; - if (!netfs_inode(inode)->cache) + if (!netfs_inode(inode)->info->cache) return -ENOBUFS; netfs_readahead(ractl); @@ -354,7 +354,7 @@ void nfs_netfs_readpage_release(struct nfs_page *req) /* * If fscache is enabled, netfs will unlock pages. */ - if (netfs_inode(inode)->cache) + if (netfs_inode(inode)->info->cache) return; unlock_page(req->wb_page); diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index 18da26157fda..23c9412a671e 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -78,9 +78,13 @@ static inline void nfs_netfs_put(struct nfs_netfs_io_data *netfs) netfs_subreq_terminated(netfs->sreq, netfs->error ?: final_len, false); kfree(netfs); } -static inline void nfs_netfs_inode_init(struct nfs_inode *nfsi) +static inline int nfs_netfs_inode_init(struct nfs_inode *nfsi) { - netfs_inode_init(&nfsi->netfs, &nfs_netfs_ops); + return netfs_inode_init(&nfsi->netfs, &nfs_netfs_ops); +} +static inline void nfs_netfs_inode_free(struct nfs_inode *nfsi) +{ + netfs_inode_free(&nfsi->netfs); } extern void nfs_netfs_initiate_read(struct nfs_pgio_header *hdr); extern void nfs_netfs_read_completion(struct nfs_pgio_header *hdr); @@ -160,7 +164,8 @@ static inline void nfs_netfs_reset_pageio_descriptor(struct nfs_pageio_descripto desc->pg_netfs = NULL; } #else /* CONFIG_NFS_FSCACHE */ -static inline void nfs_netfs_inode_init(struct nfs_inode *nfsi) {} +static inline int nfs_netfs_inode_init(struct nfs_inode *nfsi) { return 0; } +static inline void nfs_netfs_inode_free(struct nfs_inode *nfsi) { } static inline void nfs_netfs_initiate_read(struct nfs_pgio_header *hdr) {} static inline void nfs_netfs_read_completion(struct nfs_pgio_header *hdr) {} static inline void nfs_netfs_readpage_release(struct nfs_page *req) diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 116ae689a490..ba7a0f3167b6 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -2234,6 +2234,8 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) struct inode *nfs_alloc_inode(struct super_block *sb) { struct nfs_inode *nfsi; + int ret; + nfsi = alloc_inode_sb(sb, nfs_inode_cachep, GFP_KERNEL); if (!nfsi) return NULL; @@ -2245,7 +2247,11 @@ struct inode *nfs_alloc_inode(struct super_block *sb) #ifdef CONFIG_NFS_V4_2 nfsi->xattr_cache = NULL; #endif - nfs_netfs_inode_init(nfsi); + ret = nfs_netfs_inode_init(nfsi); + if (ret) { + kmem_cache_free(nfs_inode_cachep, nfsi); + return NULL; + } return VFS_I(nfsi); } @@ -2253,6 +2259,7 @@ EXPORT_SYMBOL_GPL(nfs_alloc_inode); void nfs_free_inode(struct inode *inode) { + nfs_netfs_inode_free(NFS_I(inode)); kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); } EXPORT_SYMBOL_GPL(nfs_free_inode); diff --git a/include/linux/netfs.h b/include/linux/netfs.h index f2402ddeafbf..4b4ddafab5e3 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -118,11 +118,7 @@ enum netfs_io_source { typedef void (*netfs_io_terminated_t)(void *priv, ssize_t transferred_or_error, bool was_async); -/* - * Per-inode context. This wraps the VFS inode. - */ -struct netfs_inode { - struct inode inode; /* The VFS inode */ +struct netfs_info { const struct netfs_request_ops *ops; #if IS_ENABLED(CONFIG_FSCACHE) struct fscache_cookie *cache; @@ -130,6 +126,14 @@ struct netfs_inode { loff_t remote_i_size; /* Size of the remote file */ }; +/* + * Per-inode context. This wraps the VFS inode. + */ +struct netfs_inode { + struct inode inode; /* The VFS inode */ + struct netfs_info *info; /* Rest of netfs data */ +}; + /* * Resources required to do operations on a cache. */ @@ -309,14 +313,29 @@ static inline struct netfs_inode *netfs_inode(struct inode *inode) * Initialise the netfs library context struct. This is expected to follow on * directly from the VFS inode struct. */ -static inline void netfs_inode_init(struct netfs_inode *ctx, +static inline int netfs_inode_init(struct netfs_inode *ctx, const struct netfs_request_ops *ops) { - ctx->ops = ops; - ctx->remote_i_size = i_size_read(&ctx->inode); + ctx->info = kzalloc(sizeof(struct netfs_info), GFP_KERNEL); + if (!ctx->info ) + return -ENOMEM; + ctx->info->ops = ops; + ctx->info->remote_i_size = i_size_read(&ctx->inode); #if IS_ENABLED(CONFIG_FSCACHE) - ctx->cache = NULL; + ctx->info->cache = NULL; #endif + return 0; +} + +/** + * netfs_inode_free - Free a netfslib inode context + * @ctx: The netfs inode to free + * + * Free the netfs library info struct. + */ +static inline void netfs_inode_free(struct netfs_inode *ctx) +{ + kfree(ctx->info); } /** @@ -328,7 +347,7 @@ static inline void netfs_inode_init(struct netfs_inode *ctx, */ static inline void netfs_resize_file(struct netfs_inode *ctx, loff_t new_i_size) { - ctx->remote_i_size = new_i_size; + ctx->info->remote_i_size = new_i_size; } /** @@ -340,7 +359,7 @@ static inline void netfs_resize_file(struct netfs_inode *ctx, loff_t new_i_size) static inline struct fscache_cookie *netfs_i_cookie(struct netfs_inode *ctx) { #if IS_ENABLED(CONFIG_FSCACHE) - return ctx->cache; + return ctx->info->cache; #else return NULL; #endif