From patchwork Tue Oct 18 11:56:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Brauner X-Patchwork-Id: 13010389 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 14F26C46467 for ; Tue, 18 Oct 2022 12:00:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230335AbiJRMAi (ORCPT ); Tue, 18 Oct 2022 08:00:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230083AbiJRL7i (ORCPT ); Tue, 18 Oct 2022 07:59:38 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0310DBE2EB; Tue, 18 Oct 2022 04:58:37 -0700 (PDT) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 9435B61525; Tue, 18 Oct 2022 11:58:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65255C4347C; Tue, 18 Oct 2022 11:58:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1666094316; bh=iwd2iQRd20Wfq9FpRkV1rvyg0up9vB32Itp3gbQykUs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OYrn/a7utTcF2H46SlHhaPmJqK/Lgq1d9IYHf/YOv2k+I7Si4/zth42oH67cJtq2U +UibA/iBOhWwOIsKbcglyB3pQQiXWOTiuG6L1moaRB0xkQ9yxQHoE2hEsyVMFTsdWS WNQY5vkNLb4q7J+MCXEPDB9agXp0pow3hsMaH5eRkuuMnfBywr2+pfpE9JbrJlbSOY 66zaSZA7ZjMRbGtqYIGsYwcE4KzHO0ICr0O5R1uvlli3AceO6GmcU95VFOwrlQQTV7 fxNmgcpNr3F3fzTT4kzBxBwecNyz6/XuhzqBQI9/GbWOshJh9L9aFGRHAk3gq98/Lh vmjSn3HBF/9yQ== From: Christian Brauner To: linux-fsdevel@vger.kernel.org Cc: Christian Brauner , Seth Forshee , Christoph Hellwig , Al Viro , Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , v9fs-developer@lists.sourceforge.net, linux-security-module@vger.kernel.org Subject: [PATCH v5 29/30] 9p: use stub posix acl handlers Date: Tue, 18 Oct 2022 13:56:59 +0200 Message-Id: <20221018115700.166010-30-brauner@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221018115700.166010-1-brauner@kernel.org> References: <20221018115700.166010-1-brauner@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=5489; i=brauner@kernel.org; h=from:subject; bh=iwd2iQRd20Wfq9FpRkV1rvyg0up9vB32Itp3gbQykUs=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMST7TdHa16qXfC4soppp0eHjR1nsNvRoNPfqm03ctUDUwzp3 el16RykLgxgXg6yYIotDu0m43HKeis1GmRowc1iZQIYwcHEKwESqoxn+F+44eVyT3WGui8eZRNX1z/ 7aqU/de/cc10ytJfN95k/mu83IsEutTqL93YPW9m3fel7v3PnqX0IH982HB/VFT3tOf6V/lhUA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Precedence: bulk List-ID: Now that 9p supports the get and set acl inode operations and the vfs has been switched to the new posi api, 9p can simply rely on the stub posix acl handlers. The custom xattr handlers and associated unused helpers can be removed. Signed-off-by: Christian Brauner (Microsoft) --- Notes: /* v2 */ unchanged /* v3 */ unchanged /* v4 */ unchanged /* v5 */ unchanged fs/9p/acl.c | 121 -------------------------------------------------- fs/9p/xattr.c | 7 +-- fs/9p/xattr.h | 2 - 3 files changed, 4 insertions(+), 126 deletions(-) diff --git a/fs/9p/acl.c b/fs/9p/acl.c index 135b26cee63a..c397c51f80d9 100644 --- a/fs/9p/acl.c +++ b/fs/9p/acl.c @@ -343,124 +343,3 @@ int v9fs_acl_mode(struct inode *dir, umode_t *modep, *modep = mode; return 0; } - -static int v9fs_xattr_get_acl(const struct xattr_handler *handler, - struct dentry *dentry, struct inode *inode, - const char *name, void *buffer, size_t size) -{ - struct v9fs_session_info *v9ses; - struct posix_acl *acl; - int error; - - v9ses = v9fs_dentry2v9ses(dentry); - /* - * We allow set/get/list of acl when access=client is not specified - */ - if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) - return v9fs_xattr_get(dentry, handler->name, buffer, size); - - acl = v9fs_get_cached_acl(inode, handler->flags); - if (IS_ERR(acl)) - return PTR_ERR(acl); - if (acl == NULL) - return -ENODATA; - error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size); - posix_acl_release(acl); - - return error; -} - -static int v9fs_xattr_set_acl(const struct xattr_handler *handler, - struct user_namespace *mnt_userns, - struct dentry *dentry, struct inode *inode, - const char *name, const void *value, - size_t size, int flags) -{ - int retval; - struct posix_acl *acl; - struct v9fs_session_info *v9ses; - - v9ses = v9fs_dentry2v9ses(dentry); - /* - * set the attribute on the remote. Without even looking at the - * xattr value. We leave it to the server to validate - */ - if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) - return v9fs_xattr_set(dentry, handler->name, value, size, - flags); - - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - if (!inode_owner_or_capable(&init_user_ns, inode)) - return -EPERM; - if (value) { - /* update the cached acl value */ - acl = posix_acl_from_xattr(&init_user_ns, value, size); - if (IS_ERR(acl)) - return PTR_ERR(acl); - else if (acl) { - retval = posix_acl_valid(inode->i_sb->s_user_ns, acl); - if (retval) - goto err_out; - } - } else - acl = NULL; - - switch (handler->flags) { - case ACL_TYPE_ACCESS: - if (acl) { - struct iattr iattr = { 0 }; - struct posix_acl *old_acl = acl; - - retval = posix_acl_update_mode(&init_user_ns, inode, - &iattr.ia_mode, &acl); - if (retval) - goto err_out; - if (!acl) { - /* - * ACL can be represented - * by the mode bits. So don't - * update ACL. - */ - posix_acl_release(old_acl); - value = NULL; - size = 0; - } - iattr.ia_valid = ATTR_MODE; - /* FIXME should we update ctime ? - * What is the following setxattr update the - * mode ? - */ - v9fs_vfs_setattr_dotl(&init_user_ns, dentry, &iattr); - } - break; - case ACL_TYPE_DEFAULT: - if (!S_ISDIR(inode->i_mode)) { - retval = acl ? -EINVAL : 0; - goto err_out; - } - break; - default: - BUG(); - } - retval = v9fs_xattr_set(dentry, handler->name, value, size, flags); - if (!retval) - set_cached_acl(inode, handler->flags, acl); -err_out: - posix_acl_release(acl); - return retval; -} - -const struct xattr_handler v9fs_xattr_acl_access_handler = { - .name = XATTR_NAME_POSIX_ACL_ACCESS, - .flags = ACL_TYPE_ACCESS, - .get = v9fs_xattr_get_acl, - .set = v9fs_xattr_set_acl, -}; - -const struct xattr_handler v9fs_xattr_acl_default_handler = { - .name = XATTR_NAME_POSIX_ACL_DEFAULT, - .flags = ACL_TYPE_DEFAULT, - .get = v9fs_xattr_get_acl, - .set = v9fs_xattr_set_acl, -}; diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c index 1f9298a4bd42..ae6a93871338 100644 --- a/fs/9p/xattr.c +++ b/fs/9p/xattr.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include @@ -182,9 +183,9 @@ static struct xattr_handler v9fs_xattr_security_handler = { const struct xattr_handler *v9fs_xattr_handlers[] = { &v9fs_xattr_user_handler, &v9fs_xattr_trusted_handler, -#ifdef CONFIG_9P_FS_POSIX_ACL - &v9fs_xattr_acl_access_handler, - &v9fs_xattr_acl_default_handler, +#ifdef CONFIG_FS_POSIX_ACL + &posix_acl_access_xattr_handler, + &posix_acl_default_xattr_handler, #endif #ifdef CONFIG_9P_FS_SECURITY &v9fs_xattr_security_handler, diff --git a/fs/9p/xattr.h b/fs/9p/xattr.h index 3e11fc3331eb..b5636e544c8a 100644 --- a/fs/9p/xattr.h +++ b/fs/9p/xattr.h @@ -11,8 +11,6 @@ #include extern const struct xattr_handler *v9fs_xattr_handlers[]; -extern const struct xattr_handler v9fs_xattr_acl_access_handler; -extern const struct xattr_handler v9fs_xattr_acl_default_handler; ssize_t v9fs_fid_xattr_get(struct p9_fid *fid, const char *name, void *buffer, size_t buffer_size);