Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268253AbUIWEEe (ORCPT ); Thu, 23 Sep 2004 00:04:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268257AbUIWEEe (ORCPT ); Thu, 23 Sep 2004 00:04:34 -0400 Received: from mx1.redhat.com ([66.187.233.31]:28358 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S268253AbUIWD6n (ORCPT ); Wed, 22 Sep 2004 23:58:43 -0400 Date: Wed, 22 Sep 2004 23:58:31 -0400 (EDT) From: James Morris X-X-Sender: jmorris@thoron.boston.redhat.com To: Andrew Morton , cc: Stephen Smalley , Christoph Hellwig , Andreas Gruenbacher , Subject: [PATCH 5/6] xattr consolidation v3 - devpts In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 12705 Lines: 447 This patch updates the devpts xattr handler code to the generic xattr API, also adds a GPL notice, author and copyright details. fs/devpts/Makefile | 1 fs/devpts/inode.c | 34 ++++--- fs/devpts/xattr.c | 214 --------------------------------------------- fs/devpts/xattr.h | 59 ------------ fs/devpts/xattr_security.c | 29 +++--- 5 files changed, 39 insertions(+), 298 deletions(-) Signed-off-by: James Morris Signed-off-by: Stephen Smalley diff -purN -X dontdiff linux-2.6.9-rc2-mm2.p/fs/devpts/inode.c linux-2.6.9-rc2-mm2.w/fs/devpts/inode.c --- linux-2.6.9-rc2-mm2.p/fs/devpts/inode.c 2004-09-13 01:31:57.000000000 -0400 +++ linux-2.6.9-rc2-mm2.w/fs/devpts/inode.c 2004-09-22 19:33:38.703409560 -0400 @@ -18,10 +18,28 @@ #include #include #include -#include "xattr.h" +#include #define DEVPTS_SUPER_MAGIC 0x1cd1 +extern struct xattr_handler devpts_xattr_security_handler; + +static struct xattr_handler *devpts_xattr_handlers[] = { +#ifdef CONFIG_DEVPTS_FS_SECURITY + &devpts_xattr_security_handler, +#endif + NULL +}; + +struct inode_operations devpts_file_inode_operations = { +#ifdef CONFIG_DEVPTS_FS_XATTR + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = generic_listxattr, + .removexattr = generic_removexattr, +#endif +}; + static struct vfsmount *devpts_mnt; static struct dentry *devpts_root; @@ -84,6 +102,7 @@ devpts_fill_super(struct super_block *s, s->s_blocksize_bits = 10; s->s_magic = DEVPTS_SUPER_MAGIC; s->s_op = &devpts_sops; + s->s_xattr = devpts_xattr_handlers; inode = new_inode(s); if (!inode) @@ -134,13 +153,6 @@ static struct dentry *get_node(int num) return lookup_one_len(s, root, sprintf(s, "%d", num)); } -static struct inode_operations devpts_file_inode_operations = { - .setxattr = devpts_setxattr, - .getxattr = devpts_getxattr, - .listxattr = devpts_listxattr, - .removexattr = devpts_removexattr, -}; - int devpts_pty_new(struct tty_struct *tty) { int number = tty->index; @@ -209,10 +221,7 @@ void devpts_pty_kill(int number) static int __init init_devpts_fs(void) { - int err = init_devpts_xattr(); - if (err) - return err; - err = register_filesystem(&devpts_fs_type); + int err = register_filesystem(&devpts_fs_type); if (!err) { devpts_mnt = kern_mount(&devpts_fs_type); if (IS_ERR(devpts_mnt)) @@ -225,7 +234,6 @@ static void __exit exit_devpts_fs(void) { unregister_filesystem(&devpts_fs_type); mntput(devpts_mnt); - exit_devpts_xattr(); } module_init(init_devpts_fs) diff -purN -X dontdiff linux-2.6.9-rc2-mm2.p/fs/devpts/Makefile linux-2.6.9-rc2-mm2.w/fs/devpts/Makefile --- linux-2.6.9-rc2-mm2.p/fs/devpts/Makefile 2004-09-13 01:32:55.000000000 -0400 +++ linux-2.6.9-rc2-mm2.w/fs/devpts/Makefile 2004-09-22 19:33:38.704409408 -0400 @@ -5,5 +5,4 @@ obj-$(CONFIG_UNIX98_PTYS) += devpts.o devpts-$(CONFIG_UNIX98_PTYS) := inode.o -devpts-$(CONFIG_DEVPTS_FS_XATTR) += xattr.o devpts-$(CONFIG_DEVPTS_FS_SECURITY) += xattr_security.o diff -purN -X dontdiff linux-2.6.9-rc2-mm2.p/fs/devpts/xattr.c linux-2.6.9-rc2-mm2.w/fs/devpts/xattr.c --- linux-2.6.9-rc2-mm2.p/fs/devpts/xattr.c 2004-09-13 01:33:23.000000000 -0400 +++ linux-2.6.9-rc2-mm2.w/fs/devpts/xattr.c 1969-12-31 19:00:00.000000000 -0500 @@ -1,214 +0,0 @@ -/* - File: fs/devpts/xattr.c - - Derived from fs/ext3/xattr.c, changed in the following ways: - drop everything related to persistent storage of EAs - pass dentry rather than inode to internal methods - only presently define a handler for security modules -*/ - -#include -#include -#include -#include -#include -#include "xattr.h" - -static struct devpts_xattr_handler *devpts_xattr_handlers[DEVPTS_XATTR_INDEX_MAX]; -static rwlock_t devpts_handler_lock = RW_LOCK_UNLOCKED; - -int -devpts_xattr_register(int name_index, struct devpts_xattr_handler *handler) -{ - int error = -EINVAL; - - if (name_index > 0 && name_index <= DEVPTS_XATTR_INDEX_MAX) { - write_lock(&devpts_handler_lock); - if (!devpts_xattr_handlers[name_index-1]) { - devpts_xattr_handlers[name_index-1] = handler; - error = 0; - } - write_unlock(&devpts_handler_lock); - } - return error; -} - -void -devpts_xattr_unregister(int name_index, struct devpts_xattr_handler *handler) -{ - if (name_index > 0 || name_index <= DEVPTS_XATTR_INDEX_MAX) { - write_lock(&devpts_handler_lock); - devpts_xattr_handlers[name_index-1] = NULL; - write_unlock(&devpts_handler_lock); - } -} - -static inline const char * -strcmp_prefix(const char *a, const char *a_prefix) -{ - while (*a_prefix && *a == *a_prefix) { - a++; - a_prefix++; - } - return *a_prefix ? NULL : a; -} - -/* - * Decode the extended attribute name, and translate it into - * the name_index and name suffix. - */ -static inline struct devpts_xattr_handler * -devpts_xattr_resolve_name(const char **name) -{ - struct devpts_xattr_handler *handler = NULL; - int i; - - if (!*name) - return NULL; - read_lock(&devpts_handler_lock); - for (i=0; iprefix); - if (n) { - handler = devpts_xattr_handlers[i]; - *name = n; - break; - } - } - } - read_unlock(&devpts_handler_lock); - return handler; -} - -static inline struct devpts_xattr_handler * -devpts_xattr_handler(int name_index) -{ - struct devpts_xattr_handler *handler = NULL; - if (name_index > 0 && name_index <= DEVPTS_XATTR_INDEX_MAX) { - read_lock(&devpts_handler_lock); - handler = devpts_xattr_handlers[name_index-1]; - read_unlock(&devpts_handler_lock); - } - return handler; -} - -/* - * Inode operation getxattr() - * - * dentry->d_inode->i_sem down - */ -ssize_t -devpts_getxattr(struct dentry *dentry, const char *name, - void *buffer, size_t size) -{ - struct devpts_xattr_handler *handler; - - handler = devpts_xattr_resolve_name(&name); - if (!handler) - return -EOPNOTSUPP; - return handler->get(dentry, name, buffer, size); -} - -/* - * Inode operation listxattr() - * - * dentry->d_inode->i_sem down - */ -ssize_t -devpts_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) -{ - struct devpts_xattr_handler *handler = NULL; - int i, error = 0; - unsigned int size = 0; - char *buf; - - read_lock(&devpts_handler_lock); - - for (i=0; ilist(dentry, NULL); - } - - if (!buffer) { - error = size; - goto out; - } else { - error = -ERANGE; - if (size > buffer_size) - goto out; - } - - buf = buffer; - for (i=0; ilist(dentry, buf); - } - error = size; - -out: - read_unlock(&devpts_handler_lock); - return size; -} - -/* - * Inode operation setxattr() - * - * dentry->d_inode->i_sem down - */ -int -devpts_setxattr(struct dentry *dentry, const char *name, - const void *value, size_t size, int flags) -{ - struct devpts_xattr_handler *handler; - - if (size == 0) - value = ""; /* empty EA, do not remove */ - handler = devpts_xattr_resolve_name(&name); - if (!handler) - return -EOPNOTSUPP; - return handler->set(dentry, name, value, size, flags); -} - -/* - * Inode operation removexattr() - * - * dentry->d_inode->i_sem down - */ -int -devpts_removexattr(struct dentry *dentry, const char *name) -{ - struct devpts_xattr_handler *handler; - - handler = devpts_xattr_resolve_name(&name); - if (!handler) - return -EOPNOTSUPP; - return handler->set(dentry, name, NULL, 0, XATTR_REPLACE); -} - -int __init -init_devpts_xattr(void) -{ -#ifdef CONFIG_DEVPTS_FS_SECURITY - int err; - - err = devpts_xattr_register(DEVPTS_XATTR_INDEX_SECURITY, - &devpts_xattr_security_handler); - if (err) - return err; -#endif - - return 0; -} - -void -exit_devpts_xattr(void) -{ -#ifdef CONFIG_DEVPTS_FS_SECURITY - devpts_xattr_unregister(DEVPTS_XATTR_INDEX_SECURITY, - &devpts_xattr_security_handler); -#endif - -} diff -purN -X dontdiff linux-2.6.9-rc2-mm2.p/fs/devpts/xattr.h linux-2.6.9-rc2-mm2.w/fs/devpts/xattr.h --- linux-2.6.9-rc2-mm2.p/fs/devpts/xattr.h 2004-09-13 01:32:48.000000000 -0400 +++ linux-2.6.9-rc2-mm2.w/fs/devpts/xattr.h 1969-12-31 19:00:00.000000000 -0500 @@ -1,59 +0,0 @@ -/* - File: fs/devpts/xattr.h - - Derived from fs/ext3/xattr.h, changed in the following ways: - drop everything related to persistent storage of EAs - pass dentry rather than inode to internal methods - only presently define a handler for security modules -*/ - -#include -#include - -/* Name indexes */ -#define DEVPTS_XATTR_INDEX_MAX 10 -#define DEVPTS_XATTR_INDEX_SECURITY 1 - -# ifdef CONFIG_DEVPTS_FS_XATTR - -struct devpts_xattr_handler { - char *prefix; - size_t (*list)(struct dentry *dentry, char *buffer); - int (*get)(struct dentry *dentry, const char *name, void *buffer, - size_t size); - int (*set)(struct dentry *dentry, const char *name, const void *buffer, - size_t size, int flags); -}; - -extern int devpts_xattr_register(int, struct devpts_xattr_handler *); -extern void devpts_xattr_unregister(int, struct devpts_xattr_handler *); - -extern int devpts_setxattr(struct dentry *, const char *, const void *, size_t, int); -extern ssize_t devpts_getxattr(struct dentry *, const char *, void *, size_t); -extern ssize_t devpts_listxattr(struct dentry *, char *, size_t); -extern int devpts_removexattr(struct dentry *, const char *); - -extern int init_devpts_xattr(void); -extern void exit_devpts_xattr(void); - -# else /* CONFIG_DEVPTS_FS_XATTR */ -# define devpts_setxattr NULL -# define devpts_getxattr NULL -# define devpts_listxattr NULL -# define devpts_removexattr NULL - -static inline int -init_devpts_xattr(void) -{ - return 0; -} - -static inline void -exit_devpts_xattr(void) -{ -} - -# endif /* CONFIG_DEVPTS_FS_XATTR */ - -extern struct devpts_xattr_handler devpts_xattr_security_handler; - diff -purN -X dontdiff linux-2.6.9-rc2-mm2.p/fs/devpts/xattr_security.c linux-2.6.9-rc2-mm2.w/fs/devpts/xattr_security.c --- linux-2.6.9-rc2-mm2.p/fs/devpts/xattr_security.c 2004-09-13 01:32:27.000000000 -0400 +++ linux-2.6.9-rc2-mm2.w/fs/devpts/xattr_security.c 2004-09-22 19:33:38.709408648 -0400 @@ -1,38 +1,45 @@ /* - * File: fs/devpts/xattr_security.c + * Security xattr support for devpts. + * + * Author: Stephen Smalley + * Copyright (c) 2004 Red Hat, Inc., James Morris + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. */ - -#include #include #include #include -#include "xattr.h" +#include static size_t -devpts_xattr_security_list(struct dentry *dentry, char *buffer) +devpts_xattr_security_list(struct inode *inode, char *list, size_t list_len, + const char *name, size_t name_len) { - return security_inode_listsecurity(dentry, buffer); + return security_inode_listsecurity(inode, list, list_len); } static int -devpts_xattr_security_get(struct dentry *dentry, const char *name, +devpts_xattr_security_get(struct inode *inode, const char *name, void *buffer, size_t size) { if (strcmp(name, "") == 0) return -EINVAL; - return security_inode_getsecurity(dentry, name, buffer, size); + return security_inode_getsecurity(inode, name, buffer, size); } static int -devpts_xattr_security_set(struct dentry *dentry, const char *name, +devpts_xattr_security_set(struct inode *inode, const char *name, const void *value, size_t size, int flags) { if (strcmp(name, "") == 0) return -EINVAL; - return security_inode_setsecurity(dentry, name, value, size, flags); + return security_inode_setsecurity(inode, name, value, size, flags); } -struct devpts_xattr_handler devpts_xattr_security_handler = { +struct xattr_handler devpts_xattr_security_handler = { .prefix = XATTR_SECURITY_PREFIX, .list = devpts_xattr_security_list, .get = devpts_xattr_security_get, - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/