From patchwork Mon Jan 25 21:33:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 370684 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D3A93C433E0 for ; Mon, 25 Jan 2021 22:42:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9720620756 for ; Mon, 25 Jan 2021 22:42:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732671AbhAYWmm (ORCPT ); Mon, 25 Jan 2021 17:42:42 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:60533 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732845AbhAYVfc (ORCPT ); Mon, 25 Jan 2021 16:35:32 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611610444; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LnEtYBUhzI3CX1vikJ0e0ojAT0Lczz7YWxs9VcDeUYY=; b=ZwEgQNGP6CRY4E9rWMMolMKKlyiXRyTyqaUVN1SgSvbRgPKl7sUHFPYZyjA9K3yW08rAL9 1S9k07hUX13Fa6fsxMt29Sg7/Q59syV/8w0pl9CLsYhz4iZASM9JjEuJA1Ye2gmzVijaLl rQt4+fsXaPCkugglCk0RRpx2U1Bb5NU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-378-abmkHp3HOgmS_FnGCNOCQg-1; Mon, 25 Jan 2021 16:34:02 -0500 X-MC-Unique: abmkHp3HOgmS_FnGCNOCQg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DC44218C89C4; Mon, 25 Jan 2021 21:34:00 +0000 (UTC) Received: from warthog.procyon.org.uk (ovpn-115-23.rdu2.redhat.com [10.10.115.23]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3289E60C47; Mon, 25 Jan 2021 21:33:54 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 15/32] afs: Move key to afs_read struct From: David Howells To: Trond Myklebust , Anna Schumaker , Steve French , Dominique Martinet Cc: dhowells@redhat.com, Jeff Layton , David Wysochanski , Matthew Wilcox , Alexander Viro , linux-cachefs@redhat.com, linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Mon, 25 Jan 2021 21:33:53 +0000 Message-ID: <161161043340.2537118.511899217704140722.stgit@warthog.procyon.org.uk> In-Reply-To: <161161025063.2537118.2009249444682241405.stgit@warthog.procyon.org.uk> References: <161161025063.2537118.2009249444682241405.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Stash the key used to authenticate read operations in the afs_read struct. This will be necessary to reissue the operation against the server if a read from the cache fails in upcoming cache changes. Signed-off-by: David Howells --- fs/afs/dir.c | 3 ++- fs/afs/file.c | 16 +++++++++------- fs/afs/internal.h | 3 ++- fs/afs/write.c | 12 ++++++------ 4 files changed, 19 insertions(+), 15 deletions(-) diff --git a/fs/afs/dir.c b/fs/afs/dir.c index 7bd659ad959e..96e9e2e60d97 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -241,6 +241,7 @@ static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key) return ERR_PTR(-ENOMEM); refcount_set(&req->usage, 1); + req->key = key_get(key); req->nr_pages = nr_pages; req->actual_len = i_size; /* May change */ req->len = nr_pages * PAGE_SIZE; /* We can ask for more than there is */ @@ -305,7 +306,7 @@ static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key) if (!test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { trace_afs_reload_dir(dvnode); - ret = afs_fetch_data(dvnode, key, req); + ret = afs_fetch_data(dvnode, req); if (ret < 0) goto error_unlock; diff --git a/fs/afs/file.c b/fs/afs/file.c index 21868bfc3a44..d23192b3b933 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -199,6 +199,7 @@ void afs_put_read(struct afs_read *req) if (req->pages != req->array) kfree(req->pages); } + key_put(req->key); kfree(req); } } @@ -229,7 +230,7 @@ static const struct afs_operation_ops afs_fetch_data_operation = { /* * Fetch file data from the volume. */ -int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *req) +int afs_fetch_data(struct afs_vnode *vnode, struct afs_read *req) { struct afs_operation *op; @@ -238,9 +239,9 @@ int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *re vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique, - key_serial(key)); + key_serial(req->key)); - op = afs_alloc_operation(key, vnode->volume); + op = afs_alloc_operation(req->key, vnode->volume); if (IS_ERR(op)) return PTR_ERR(op); @@ -279,6 +280,7 @@ int afs_page_filler(void *data, struct page *page) * unmarshalling code will clear the unfilled space. */ refcount_set(&req->usage, 1); + req->key = key_get(key); req->pos = (loff_t)page->index << PAGE_SHIFT; req->len = PAGE_SIZE; req->nr_pages = 1; @@ -288,7 +290,7 @@ int afs_page_filler(void *data, struct page *page) /* read the contents of the file from the server into the * page */ - ret = afs_fetch_data(vnode, key, req); + ret = afs_fetch_data(vnode, req); afs_put_read(req); if (ret < 0) { @@ -373,7 +375,6 @@ static int afs_readpages_one(struct file *file, struct address_space *mapping, struct afs_read *req; struct list_head *p; struct page *first, *page; - struct key *key = afs_file_key(file); pgoff_t index; int ret, n, i; @@ -397,6 +398,7 @@ static int afs_readpages_one(struct file *file, struct address_space *mapping, refcount_set(&req->usage, 1); req->vnode = vnode; + req->key = key_get(afs_file_key(file)); req->page_done = afs_readpages_page_done; req->pos = first->index; req->pos <<= PAGE_SHIFT; @@ -426,11 +428,11 @@ static int afs_readpages_one(struct file *file, struct address_space *mapping, } while (req->nr_pages < n); if (req->nr_pages == 0) { - kfree(req); + afs_put_read(req); return 0; } - ret = afs_fetch_data(vnode, key, req); + ret = afs_fetch_data(vnode, req); if (ret < 0) goto error; diff --git a/fs/afs/internal.h b/fs/afs/internal.h index cd545e7dbfb8..4b255d10f726 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -204,6 +204,7 @@ struct afs_read { loff_t actual_len; /* How much we're actually getting */ loff_t remain; /* Amount remaining */ loff_t file_size; /* File size returned by server */ + struct key *key; /* The key to use to reissue the read */ afs_dataversion_t data_version; /* Version number returned by server */ refcount_t usage; unsigned int index; /* Which page we're reading into */ @@ -1045,7 +1046,7 @@ extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); extern void afs_put_wb_key(struct afs_wb_key *); extern int afs_open(struct inode *, struct file *); extern int afs_release(struct inode *, struct file *); -extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); +extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); extern int afs_page_filler(void *, struct page *); extern void afs_put_read(struct afs_read *); diff --git a/fs/afs/write.c b/fs/afs/write.c index 9d0cef35ecba..7eba0d3201ba 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -25,9 +25,10 @@ int afs_set_page_dirty(struct page *page) /* * partly or wholly fill a page that's under preparation for writing */ -static int afs_fill_page(struct afs_vnode *vnode, struct key *key, +static int afs_fill_page(struct file *file, loff_t pos, unsigned int len, struct page *page) { + struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); struct afs_read *req; size_t p; void *data; @@ -49,6 +50,7 @@ static int afs_fill_page(struct afs_vnode *vnode, struct key *key, return -ENOMEM; refcount_set(&req->usage, 1); + req->key = key_get(afs_file_key(file)); req->pos = pos; req->len = len; req->nr_pages = 1; @@ -56,7 +58,7 @@ static int afs_fill_page(struct afs_vnode *vnode, struct key *key, req->pages[0] = page; get_page(page); - ret = afs_fetch_data(vnode, key, req); + ret = afs_fetch_data(vnode, req); afs_put_read(req); if (ret < 0) { if (ret == -ENOENT) { @@ -80,7 +82,6 @@ int afs_write_begin(struct file *file, struct address_space *mapping, { struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); struct page *page; - struct key *key = afs_file_key(file); unsigned long priv; unsigned f, from = pos & (PAGE_SIZE - 1); unsigned t, to = from + len; @@ -95,7 +96,7 @@ int afs_write_begin(struct file *file, struct address_space *mapping, return -ENOMEM; if (!PageUptodate(page) && len != PAGE_SIZE) { - ret = afs_fill_page(vnode, key, pos & PAGE_MASK, PAGE_SIZE, page); + ret = afs_fill_page(file, pos & PAGE_MASK, PAGE_SIZE, page); if (ret < 0) { unlock_page(page); put_page(page); @@ -163,7 +164,6 @@ int afs_write_end(struct file *file, struct address_space *mapping, struct page *page, void *fsdata) { struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); - struct key *key = afs_file_key(file); unsigned long priv; unsigned int f, from = pos & (PAGE_SIZE - 1); unsigned int t, to = from + copied; @@ -193,7 +193,7 @@ int afs_write_end(struct file *file, struct address_space *mapping, * unmarshalling routine will take care of clearing any * bits that are beyond the EOF. */ - ret = afs_fill_page(vnode, key, pos + copied, + ret = afs_fill_page(file, pos + copied, len - copied, page); if (ret < 0) goto out;