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-rw-r--r--fs/Kconfig43
-rw-r--r--fs/devpts/Makefile1
-rw-r--r--fs/devpts/inode.c21
-rw-r--r--fs/devpts/xattr_security.c47
-rw-r--r--fs/xattr.c80
5 files changed, 49 insertions, 143 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index e54be705835..ed78d24ee42 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -783,28 +783,6 @@ config SYSFS
Designers of embedded systems may wish to say N here to conserve space.
-config DEVPTS_FS_XATTR
- bool "/dev/pts Extended Attributes"
- depends on UNIX98_PTYS
- help
- Extended attributes are name:value pairs associated with inodes by
- the kernel or by users (see the attr(5) manual page, or visit
- <http://acl.bestbits.at/> for details).
-
- If unsure, say N.
-
-config DEVPTS_FS_SECURITY
- bool "/dev/pts Security Labels"
- depends on DEVPTS_FS_XATTR
- help
- Security labels support alternative access control models
- implemented by security modules like SELinux. This option
- enables an extended attribute handler for file security
- labels in the /dev/pts filesystem.
-
- If you are not using a security module that requires using
- extended attributes for file security labels, say N.
-
config TMPFS
bool "Virtual memory file system support (former shm fs)"
help
@@ -817,27 +795,6 @@ config TMPFS
See <file:Documentation/filesystems/tmpfs.txt> for details.
-config TMPFS_XATTR
- bool "tmpfs Extended Attributes"
- depends on TMPFS
- help
- Extended attributes are name:value pairs associated with inodes by
- the kernel or by users (see the attr(5) manual page, or visit
- <http://acl.bestbits.at/> for details).
-
- If unsure, say N.
-
-config TMPFS_SECURITY
- bool "tmpfs Security Labels"
- depends on TMPFS_XATTR
- help
- Security labels support alternative access control models
- implemented by security modules like SELinux. This option
- enables an extended attribute handler for file security
- labels in the tmpfs filesystem.
- If you are not using a security module that requires using
- extended attributes for file security labels, say N.
-
config HUGETLBFS
bool "HugeTLB file system support"
depends X86 || IA64 || PPC64 || SPARC64 || SUPERH || X86_64 || BROKEN
diff --git a/fs/devpts/Makefile b/fs/devpts/Makefile
index 5800df2e50c..236696efcba 100644
--- a/fs/devpts/Makefile
+++ b/fs/devpts/Makefile
@@ -5,4 +5,3 @@
obj-$(CONFIG_UNIX98_PTYS) += devpts.o
devpts-$(CONFIG_UNIX98_PTYS) := inode.o
-devpts-$(CONFIG_DEVPTS_FS_SECURITY) += xattr_security.o
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 1571c8d6c23..f2be44d4491 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -18,28 +18,9 @@
#include <linux/mount.h>
#include <linux/tty.h>
#include <linux/devpts_fs.h>
-#include <linux/xattr.h>
#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
-};
-
-static 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;
@@ -102,7 +83,6 @@ devpts_fill_super(struct super_block *s, void *data, int silent)
s->s_blocksize_bits = 10;
s->s_magic = DEVPTS_SUPER_MAGIC;
s->s_op = &devpts_sops;
- s->s_xattr = devpts_xattr_handlers;
s->s_time_gran = 1;
inode = new_inode(s);
@@ -175,7 +155,6 @@ int devpts_pty_new(struct tty_struct *tty)
inode->i_gid = config.setgid ? config.gid : current->fsgid;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
init_special_inode(inode, S_IFCHR|config.mode, device);
- inode->i_op = &devpts_file_inode_operations;
inode->u.generic_ip = tty;
dentry = get_node(number);
diff --git a/fs/devpts/xattr_security.c b/fs/devpts/xattr_security.c
deleted file mode 100644
index 864cb5c79ba..00000000000
--- a/fs/devpts/xattr_security.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Security xattr support for devpts.
- *
- * Author: Stephen Smalley <sds@epoch.ncsc.mil>
- * Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
- *
- * 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 <linux/string.h>
-#include <linux/fs.h>
-#include <linux/security.h>
-#include <linux/xattr.h>
-
-static size_t
-devpts_xattr_security_list(struct inode *inode, char *list, size_t list_len,
- const char *name, size_t name_len)
-{
- return security_inode_listsecurity(inode, list, list_len);
-}
-
-static int
-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(inode, name, buffer, size);
-}
-
-static int
-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(inode, name, value, size, flags);
-}
-
-struct xattr_handler devpts_xattr_security_handler = {
- .prefix = XATTR_SECURITY_PREFIX,
- .list = devpts_xattr_security_list,
- .get = devpts_xattr_security_get,
- .set = devpts_xattr_security_set,
-};
diff --git a/fs/xattr.c b/fs/xattr.c
index 6acd5c63da9..dc8bc7624f2 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -51,20 +51,29 @@ setxattr(struct dentry *d, char __user *name, void __user *value,
}
}
+ down(&d->d_inode->i_sem);
+ error = security_inode_setxattr(d, kname, kvalue, size, flags);
+ if (error)
+ goto out;
error = -EOPNOTSUPP;
if (d->d_inode->i_op && d->d_inode->i_op->setxattr) {
- down(&d->d_inode->i_sem);
- error = security_inode_setxattr(d, kname, kvalue, size, flags);
- if (error)
- goto out;
- error = d->d_inode->i_op->setxattr(d, kname, kvalue, size, flags);
+ error = d->d_inode->i_op->setxattr(d, kname, kvalue,
+ size, flags);
if (!error) {
fsnotify_xattr(d);
- security_inode_post_setxattr(d, kname, kvalue, size, flags);
+ security_inode_post_setxattr(d, kname, kvalue,
+ size, flags);
}
-out:
- up(&d->d_inode->i_sem);
+ } else if (!strncmp(kname, XATTR_SECURITY_PREFIX,
+ sizeof XATTR_SECURITY_PREFIX - 1)) {
+ const char *suffix = kname + sizeof XATTR_SECURITY_PREFIX - 1;
+ error = security_inode_setsecurity(d->d_inode, suffix, kvalue,
+ size, flags);
+ if (!error)
+ fsnotify_xattr(d);
}
+out:
+ up(&d->d_inode->i_sem);
if (kvalue)
kfree(kvalue);
return error;
@@ -139,20 +148,25 @@ getxattr(struct dentry *d, char __user *name, void __user *value, size_t size)
return -ENOMEM;
}
+ error = security_inode_getxattr(d, kname);
+ if (error)
+ goto out;
error = -EOPNOTSUPP;
- if (d->d_inode->i_op && d->d_inode->i_op->getxattr) {
- error = security_inode_getxattr(d, kname);
- if (error)
- goto out;
+ if (d->d_inode->i_op && d->d_inode->i_op->getxattr)
error = d->d_inode->i_op->getxattr(d, kname, kvalue, size);
- if (error > 0) {
- if (size && copy_to_user(value, kvalue, error))
- error = -EFAULT;
- } else if (error == -ERANGE && size >= XATTR_SIZE_MAX) {
- /* The file system tried to returned a value bigger
- than XATTR_SIZE_MAX bytes. Not possible. */
- error = -E2BIG;
- }
+ else if (!strncmp(kname, XATTR_SECURITY_PREFIX,
+ sizeof XATTR_SECURITY_PREFIX - 1)) {
+ const char *suffix = kname + sizeof XATTR_SECURITY_PREFIX - 1;
+ error = security_inode_getsecurity(d->d_inode, suffix, kvalue,
+ size);
+ }
+ if (error > 0) {
+ if (size && copy_to_user(value, kvalue, error))
+ error = -EFAULT;
+ } else if (error == -ERANGE && size >= XATTR_SIZE_MAX) {
+ /* The file system tried to returned a value bigger
+ than XATTR_SIZE_MAX bytes. Not possible. */
+ error = -E2BIG;
}
out:
if (kvalue)
@@ -221,20 +235,24 @@ listxattr(struct dentry *d, char __user *list, size_t size)
return -ENOMEM;
}
+ error = security_inode_listxattr(d);
+ if (error)
+ goto out;
error = -EOPNOTSUPP;
if (d->d_inode->i_op && d->d_inode->i_op->listxattr) {
- error = security_inode_listxattr(d);
- if (error)
- goto out;
error = d->d_inode->i_op->listxattr(d, klist, size);
- if (error > 0) {
- if (size && copy_to_user(list, klist, error))
- error = -EFAULT;
- } else if (error == -ERANGE && size >= XATTR_LIST_MAX) {
- /* The file system tried to returned a list bigger
- than XATTR_LIST_MAX bytes. Not possible. */
- error = -E2BIG;
- }
+ } else {
+ error = security_inode_listsecurity(d->d_inode, klist, size);
+ if (size && error >= size)
+ error = -ERANGE;
+ }
+ if (error > 0) {
+ if (size && copy_to_user(list, klist, error))
+ error = -EFAULT;
+ } else if (error == -ERANGE && size >= XATTR_LIST_MAX) {
+ /* The file system tried to returned a list bigger
+ than XATTR_LIST_MAX bytes. Not possible. */
+ error = -E2BIG;
}
out:
if (klist)
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-21 14:54:10 +0000