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Registered in England and Wales under Company Registration No. 3798903 Subject: [RFC PATCH 57/61] afs: Invoke fscache_resize_cookie() when handling ATTR_SIZE for setattr From: David Howells To: Trond Myklebust , Anna Schumaker , Steve French , Jeff Layton Cc: dhowells@redhat.com, Matthew Wilcox , Alexander Viro , 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, 04 May 2020 18:16:07 +0100 Message-ID: <158861256762.340223.10583346645344676649.stgit@warthog.procyon.org.uk> In-Reply-To: <158861203563.340223.7585359869938129395.stgit@warthog.procyon.org.uk> References: <158861203563.340223.7585359869938129395.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.21 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Invoke fscache_resize_cookie() to adjust the size of the backing cache object when setattr is called with ATTR_SIZE. This discards any data that then lies beyond the revised EOF and frees up space. Signed-off-by: David Howells --- fs/afs/inode.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 59dc179b40cb..21a48ab74d2b 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -838,6 +838,8 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr) if (!scb) goto error; + fscache_use_cookie(afs_vnode_cache(vnode), true); + /* flush any dirty data outstanding on a regular file */ if (S_ISREG(vnode->vfs_inode.i_mode)) filemap_write_and_wait(vnode->vfs_inode.i_mapping); @@ -848,7 +850,7 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr) key = afs_request_key(vnode->volume->cell); if (IS_ERR(key)) { ret = PTR_ERR(key); - goto error_scb; + goto error_unuse; } } @@ -873,7 +875,11 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr) if (!(attr->ia_valid & ATTR_FILE)) key_put(key); -error_scb: + if ((attr->ia_valid & ATTR_SIZE) && ret == 0) + fscache_resize_cookie(afs_vnode_cache(vnode), scb->status.size); + +error_unuse: + fscache_unuse_cookie(afs_vnode_cache(vnode), NULL, NULL); kfree(scb); error: _leave(" = %d", ret);