From patchwork Wed Dec 11 10:42:54 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 3324381 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0F3749F37A for ; Wed, 11 Dec 2013 10:46:03 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8A3A920138 for ; Wed, 11 Dec 2013 10:46:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 08ACD201B3 for ; Wed, 11 Dec 2013 10:46:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751629Ab3LKKpo (ORCPT ); Wed, 11 Dec 2013 05:45:44 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:43362 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751400Ab3LKKpe (ORCPT ); Wed, 11 Dec 2013 05:45:34 -0500 Received: from hch by bombadil.infradead.org with local (Exim 4.80.1 #2 (Red Hat Linux)) id 1VqhIG-0008NU-DN; Wed, 11 Dec 2013 10:45:28 +0000 Message-Id: <20131211104528.300317604@bombadil.infradead.org> User-Agent: quilt/0.60-1 Date: Wed, 11 Dec 2013 02:42:54 -0800 From: Christoph Hellwig To: viro@zeniv.linux.org.uk Cc: linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org, Mark Fasheh , Joel Becker , reiserfs-devel@vger.kernel.org, xfs@oss.sgi.com, jfs-discussion@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, Andreas Gruenbacher Subject: [PATCH 11/18] jffs2: use generic posix ACL infrastructure References: <20131211104243.148113893@bombadil.infradead.org> Content-Disposition: inline; filename=0011-jffs2-use-generic-posix-ACL-infrastructure.patch X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Also don't bother to set up a .get_acl method for symlinks as we do not support access control (ACLs or even mode bits) for symlinks in Linux. Signed-off-by: Christoph Hellwig --- fs/jffs2/acl.c | 141 ++++------------------------------------------------ fs/jffs2/acl.h | 7 +-- fs/jffs2/dir.c | 1 + fs/jffs2/file.c | 1 + fs/jffs2/fs.c | 7 +-- fs/jffs2/symlink.c | 1 - fs/jffs2/xattr.c | 9 ++-- 7 files changed, 24 insertions(+), 143 deletions(-) diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c index 4d6e31b..009ec0b 100644 --- a/fs/jffs2/acl.c +++ b/fs/jffs2/acl.c @@ -178,10 +178,6 @@ struct posix_acl *jffs2_get_acl(struct inode *inode, int type) char *value = NULL; int rc, xprefix; - acl = get_cached_acl(inode, type); - if (acl != ACL_NOT_CACHED) - return acl; - switch (type) { case ACL_TYPE_ACCESS: xprefix = JFFS2_XPREFIX_ACL_ACCESS; @@ -232,13 +228,10 @@ static int __jffs2_set_acl(struct inode *inode, int xprefix, struct posix_acl *a return rc; } -static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl) +int jffs2_set_acl(struct inode *inode, struct posix_acl *acl, int type) { int rc, xprefix; - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - switch (type) { case ACL_TYPE_ACCESS: xprefix = JFFS2_XPREFIX_ACL_ACCESS; @@ -277,30 +270,21 @@ static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl) int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, umode_t *i_mode) { - struct posix_acl *acl; + struct posix_acl *default_acl, *acl; int rc; cache_no_acl(inode); - if (S_ISLNK(*i_mode)) - return 0; /* Symlink always has no-ACL */ - - acl = jffs2_get_acl(dir_i, ACL_TYPE_DEFAULT); - if (IS_ERR(acl)) - return PTR_ERR(acl); - - if (!acl) { - *i_mode &= ~current_umask(); - } else { - if (S_ISDIR(*i_mode)) - set_cached_acl(inode, ACL_TYPE_DEFAULT, acl); - - rc = __posix_acl_create(&acl, GFP_KERNEL, i_mode); - if (rc < 0) - return rc; - if (rc > 0) - set_cached_acl(inode, ACL_TYPE_ACCESS, acl); + rc = posix_acl_create(dir_i, i_mode, &default_acl, &acl); + if (rc) + return rc; + if (default_acl) { + set_cached_acl(inode, ACL_TYPE_DEFAULT, default_acl); + posix_acl_release(default_acl); + } + if (acl) { + set_cached_acl(inode, ACL_TYPE_ACCESS, acl); posix_acl_release(acl); } return 0; @@ -324,106 +308,3 @@ int jffs2_init_acl_post(struct inode *inode) return 0; } - -int jffs2_acl_chmod(struct inode *inode) -{ - struct posix_acl *acl; - int rc; - - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - acl = jffs2_get_acl(inode, ACL_TYPE_ACCESS); - if (IS_ERR(acl) || !acl) - return PTR_ERR(acl); - rc = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode); - if (rc) - return rc; - rc = jffs2_set_acl(inode, ACL_TYPE_ACCESS, acl); - posix_acl_release(acl); - return rc; -} - -static size_t jffs2_acl_access_listxattr(struct dentry *dentry, char *list, - size_t list_size, const char *name, size_t name_len, int type) -{ - const int retlen = sizeof(POSIX_ACL_XATTR_ACCESS); - - if (list && retlen <= list_size) - strcpy(list, POSIX_ACL_XATTR_ACCESS); - return retlen; -} - -static size_t jffs2_acl_default_listxattr(struct dentry *dentry, char *list, - size_t list_size, const char *name, size_t name_len, int type) -{ - const int retlen = sizeof(POSIX_ACL_XATTR_DEFAULT); - - if (list && retlen <= list_size) - strcpy(list, POSIX_ACL_XATTR_DEFAULT); - return retlen; -} - -static int jffs2_acl_getxattr(struct dentry *dentry, const char *name, - void *buffer, size_t size, int type) -{ - struct posix_acl *acl; - int rc; - - if (name[0] != '\0') - return -EINVAL; - - acl = jffs2_get_acl(dentry->d_inode, type); - if (IS_ERR(acl)) - return PTR_ERR(acl); - if (!acl) - return -ENODATA; - rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size); - posix_acl_release(acl); - - return rc; -} - -static int jffs2_acl_setxattr(struct dentry *dentry, const char *name, - const void *value, size_t size, int flags, int type) -{ - struct posix_acl *acl; - int rc; - - if (name[0] != '\0') - return -EINVAL; - if (!inode_owner_or_capable(dentry->d_inode)) - return -EPERM; - - if (value) { - acl = posix_acl_from_xattr(&init_user_ns, value, size); - if (IS_ERR(acl)) - return PTR_ERR(acl); - if (acl) { - rc = posix_acl_valid(acl); - if (rc) - goto out; - } - } else { - acl = NULL; - } - rc = jffs2_set_acl(dentry->d_inode, type, acl); - out: - posix_acl_release(acl); - return rc; -} - -const struct xattr_handler jffs2_acl_access_xattr_handler = { - .prefix = POSIX_ACL_XATTR_ACCESS, - .flags = ACL_TYPE_DEFAULT, - .list = jffs2_acl_access_listxattr, - .get = jffs2_acl_getxattr, - .set = jffs2_acl_setxattr, -}; - -const struct xattr_handler jffs2_acl_default_xattr_handler = { - .prefix = POSIX_ACL_XATTR_DEFAULT, - .flags = ACL_TYPE_DEFAULT, - .list = jffs2_acl_default_listxattr, - .get = jffs2_acl_getxattr, - .set = jffs2_acl_setxattr, -}; diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h index 9b47724..2e2b574 100644 --- a/fs/jffs2/acl.h +++ b/fs/jffs2/acl.h @@ -27,17 +27,14 @@ struct jffs2_acl_header { #ifdef CONFIG_JFFS2_FS_POSIX_ACL struct posix_acl *jffs2_get_acl(struct inode *inode, int type); -extern int jffs2_acl_chmod(struct inode *); +int jffs2_set_acl(struct inode *inode, struct posix_acl *acl, int type); extern int jffs2_init_acl_pre(struct inode *, struct inode *, umode_t *); extern int jffs2_init_acl_post(struct inode *); -extern const struct xattr_handler jffs2_acl_access_xattr_handler; -extern const struct xattr_handler jffs2_acl_default_xattr_handler; - #else #define jffs2_get_acl (NULL) -#define jffs2_acl_chmod(inode) (0) +#define jffs2_set_acl (NULL) #define jffs2_init_acl_pre(dir_i,inode,mode) (0) #define jffs2_init_acl_post(inode) (0) diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c index e3aac22..9385560 100644 --- a/fs/jffs2/dir.c +++ b/fs/jffs2/dir.c @@ -59,6 +59,7 @@ const struct inode_operations jffs2_dir_inode_operations = .mknod = jffs2_mknod, .rename = jffs2_rename, .get_acl = jffs2_get_acl, + .set_acl = jffs2_set_acl, .setattr = jffs2_setattr, .setxattr = jffs2_setxattr, .getxattr = jffs2_getxattr, diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c index 1506673..256cd19 100644 --- a/fs/jffs2/file.c +++ b/fs/jffs2/file.c @@ -66,6 +66,7 @@ const struct file_operations jffs2_file_operations = const struct inode_operations jffs2_file_inode_operations = { .get_acl = jffs2_get_acl, + .set_acl = jffs2_set_acl, .setattr = jffs2_setattr, .setxattr = jffs2_setxattr, .getxattr = jffs2_getxattr, diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c index 09b3ed4..a69e426 100644 --- a/fs/jffs2/fs.c +++ b/fs/jffs2/fs.c @@ -190,15 +190,16 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr) int jffs2_setattr(struct dentry *dentry, struct iattr *iattr) { + struct inode *inode = dentry->d_inode; int rc; - rc = inode_change_ok(dentry->d_inode, iattr); + rc = inode_change_ok(inode, iattr); if (rc) return rc; - rc = jffs2_do_setattr(dentry->d_inode, iattr); + rc = jffs2_do_setattr(inode, iattr); if (!rc && (iattr->ia_valid & ATTR_MODE)) - rc = jffs2_acl_chmod(dentry->d_inode); + rc = posix_acl_chmod(inode, inode->i_mode); return rc; } diff --git a/fs/jffs2/symlink.c b/fs/jffs2/symlink.c index 6e56333..c7c77b0 100644 --- a/fs/jffs2/symlink.c +++ b/fs/jffs2/symlink.c @@ -22,7 +22,6 @@ const struct inode_operations jffs2_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = jffs2_follow_link, - .get_acl = jffs2_get_acl, .setattr = jffs2_setattr, .setxattr = jffs2_setxattr, .getxattr = jffs2_getxattr, diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c index 3034e97..ad0f2e2 100644 --- a/fs/jffs2/xattr.c +++ b/fs/jffs2/xattr.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include "nodelist.h" /* -------- xdatum related functions ---------------- @@ -921,8 +922,8 @@ const struct xattr_handler *jffs2_xattr_handlers[] = { &jffs2_security_xattr_handler, #endif #ifdef CONFIG_JFFS2_FS_POSIX_ACL - &jffs2_acl_access_xattr_handler, - &jffs2_acl_default_xattr_handler, + &posix_acl_access_xattr_handler, + &posix_acl_default_xattr_handler, #endif &jffs2_trusted_xattr_handler, NULL @@ -942,10 +943,10 @@ static const struct xattr_handler *xprefix_to_handler(int xprefix) { #endif #ifdef CONFIG_JFFS2_FS_POSIX_ACL case JFFS2_XPREFIX_ACL_ACCESS: - ret = &jffs2_acl_access_xattr_handler; + ret = &posix_acl_access_xattr_handler; break; case JFFS2_XPREFIX_ACL_DEFAULT: - ret = &jffs2_acl_default_xattr_handler; + ret = &posix_acl_default_xattr_handler; break; #endif case JFFS2_XPREFIX_TRUSTED: