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hfsplus: drop ACL support

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The HFS+ Access Control Lists have not worked at all for the past five
years, and nobody seems to have noticed.  Besides, POSIX draft ACLs are
not compatible with MacOS.  Drop the feature entirely.

Link: http://lkml.kernel.org/r/20180714190608.wtnmmtjqeyladkut@eaf
Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Viacheslav Dubeyko <slava@dubeyko.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ernesto A. Fernández 2018-08-21 21:59:23 -07:00 committed by Linus Torvalds
parent afd6c9e1f5
commit f168d9fd63
11 changed files with 4 additions and 232 deletions
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15
fs/hfsplus/Kconfig
View file

@ -11,18 +11,3 @@ config HFSPLUS_FS
MacOS 8. It includes all Mac specific filesystem data such as
data forks and creator codes, but it also has several UNIX
style features such as file ownership and permissions.
config HFSPLUS_FS_POSIX_ACL
bool "HFS+ POSIX Access Control Lists"
depends on HFSPLUS_FS
select FS_POSIX_ACL
help
POSIX Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
It needs to understand that POSIX ACLs are treated only under
Linux. POSIX ACLs doesn't mean something under Mac OS X.
Mac OS X beginning with version 10.4 ("Tiger") support NFSv4 ACLs,
which are part of the NFSv4 standard.
If you don't know what Access Control Lists are, say N

2
fs/hfsplus/Makefile
View file

@ -8,5 +8,3 @@ obj-$(CONFIG_HFSPLUS_FS) += hfsplus.o
hfsplus-objs := super.o options.o inode.o ioctl.o extents.o catalog.o dir.o btree.o \
bnode.o brec.o bfind.o tables.o unicode.o wrapper.o bitmap.o part_tbl.o \
attributes.o xattr.o xattr_user.o xattr_security.o xattr_trusted.o
hfsplus-$(CONFIG_HFSPLUS_FS_POSIX_ACL) += posix_acl.o

28
fs/hfsplus/acl.h
View file

@ -1,28 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/fs/hfsplus/acl.h
*
* Vyacheslav Dubeyko <slava@dubeyko.com>
*
* Handler for Posix Access Control Lists (ACLs) support.
*/
#include <linux/posix_acl_xattr.h>
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
/* posix_acl.c */
struct posix_acl *hfsplus_get_posix_acl(struct inode *inode, int type);
int hfsplus_set_posix_acl(struct inode *inode, struct posix_acl *acl,
int type);
extern int hfsplus_init_posix_acl(struct inode *, struct inode *);
#else /* CONFIG_HFSPLUS_FS_POSIX_ACL */
#define hfsplus_get_posix_acl NULL
#define hfsplus_set_posix_acl NULL
static inline int hfsplus_init_posix_acl(struct inode *inode, struct inode *dir)
{
return 0;
}
#endif /* CONFIG_HFSPLUS_FS_POSIX_ACL */

9
fs/hfsplus/dir.c
View file

@ -18,7 +18,6 @@
#include "hfsplus_fs.h"
#include "hfsplus_raw.h"
#include "xattr.h"
#include "acl.h"
static inline void hfsplus_instantiate(struct dentry *dentry,
struct inode *inode, u32 cnid)
@ -455,7 +454,7 @@ static int hfsplus_symlink(struct inode *dir, struct dentry *dentry,
if (res)
goto out_err;
res = hfsplus_init_inode_security(inode, dir, &dentry->d_name);
res = hfsplus_init_security(inode, dir, &dentry->d_name);
if (res == -EOPNOTSUPP)
res = 0; /* Operation is not supported. */
else if (res) {
@ -496,7 +495,7 @@ static int hfsplus_mknod(struct inode *dir, struct dentry *dentry,
if (res)
goto failed_mknod;
res = hfsplus_init_inode_security(inode, dir, &dentry->d_name);
res = hfsplus_init_security(inode, dir, &dentry->d_name);
if (res == -EOPNOTSUPP)
res = 0; /* Operation is not supported. */
else if (res) {
@ -567,10 +566,6 @@ const struct inode_operations hfsplus_dir_inode_operations = {
.mknod = hfsplus_mknod,
.rename = hfsplus_rename,
.listxattr = hfsplus_listxattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl,
.set_acl = hfsplus_set_posix_acl,
#endif
};
const struct file_operations hfsplus_dir_operations = {

1
fs/hfsplus/hfsplus_fs.h
View file

@ -31,7 +31,6 @@
#define DBG_EXTENT 0x00000020
#define DBG_BITMAP 0x00000040
#define DBG_ATTR_MOD 0x00000080
#define DBG_ACL_MOD 0x00000100
#if 0
#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)

11
fs/hfsplus/inode.c
View file

@ -21,7 +21,6 @@
#include "hfsplus_fs.h"
#include "hfsplus_raw.h"
#include "xattr.h"
#include "acl.h"
static int hfsplus_readpage(struct file *file, struct page *page)
{
@ -267,12 +266,6 @@ static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
setattr_copy(inode, attr);
mark_inode_dirty(inode);
if (attr->ia_valid & ATTR_MODE) {
error = posix_acl_chmod(inode, inode->i_mode);
if (unlikely(error))
return error;
}
return 0;
}
@ -336,10 +329,6 @@ int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
static const struct inode_operations hfsplus_file_inode_operations = {
.setattr = hfsplus_setattr,
.listxattr = hfsplus_listxattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl,
.set_acl = hfsplus_set_posix_acl,
#endif
};
static const struct file_operations hfsplus_file_operations = {

144
fs/hfsplus/posix_acl.c
View file

@ -1,144 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* linux/fs/hfsplus/posix_acl.c
*
* Vyacheslav Dubeyko <slava@dubeyko.com>
*
* Handler for Posix Access Control Lists (ACLs) support.
*/
#include "hfsplus_fs.h"
#include "xattr.h"
#include "acl.h"
struct posix_acl *hfsplus_get_posix_acl(struct inode *inode, int type)
{
struct posix_acl *acl;
char *xattr_name;
char *value = NULL;
ssize_t size;
hfs_dbg(ACL_MOD, "[%s]: ino %lu\n", __func__, inode->i_ino);
switch (type) {
case ACL_TYPE_ACCESS:
xattr_name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
xattr_name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
return ERR_PTR(-EINVAL);
}
size = __hfsplus_getxattr(inode, xattr_name, NULL, 0);
if (size > 0) {
value = (char *)hfsplus_alloc_attr_entry();
if (unlikely(!value))
return ERR_PTR(-ENOMEM);
size = __hfsplus_getxattr(inode, xattr_name, value, size);
}
if (size > 0)
acl = posix_acl_from_xattr(&init_user_ns, value, size);
else if (size == -ENODATA)
acl = NULL;
else
acl = ERR_PTR(size);
hfsplus_destroy_attr_entry((hfsplus_attr_entry *)value);
return acl;
}
static int __hfsplus_set_posix_acl(struct inode *inode, struct posix_acl *acl,
int type)
{
int err;
char *xattr_name;
size_t size = 0;
char *value = NULL;
hfs_dbg(ACL_MOD, "[%s]: ino %lu\n", __func__, inode->i_ino);
switch (type) {
case ACL_TYPE_ACCESS:
xattr_name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
xattr_name = XATTR_NAME_POSIX_ACL_DEFAULT;
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
break;
default:
return -EINVAL;
}
if (acl) {
size = posix_acl_xattr_size(acl->a_count);
if (unlikely(size > HFSPLUS_MAX_INLINE_DATA_SIZE))
return -ENOMEM;
value = (char *)hfsplus_alloc_attr_entry();
if (unlikely(!value))
return -ENOMEM;
err = posix_acl_to_xattr(&init_user_ns, acl, value, size);
if (unlikely(err < 0))
goto end_set_acl;
}
err = __hfsplus_setxattr(inode, xattr_name, value, size, 0);
end_set_acl:
hfsplus_destroy_attr_entry((hfsplus_attr_entry *)value);
if (!err)
set_cached_acl(inode, type, acl);
return err;
}
int hfsplus_set_posix_acl(struct inode *inode, struct posix_acl *acl, int type)
{
int err;
if (type == ACL_TYPE_ACCESS && acl) {
err = posix_acl_update_mode(inode, &inode->i_mode, &acl);
if (err)
return err;
}
return __hfsplus_set_posix_acl(inode, acl, type);
}
int hfsplus_init_posix_acl(struct inode *inode, struct inode *dir)
{
int err = 0;
struct posix_acl *default_acl, *acl;
hfs_dbg(ACL_MOD,
"[%s]: ino %lu, dir->ino %lu\n",
__func__, inode->i_ino, dir->i_ino);
if (S_ISLNK(inode->i_mode))
return 0;
err = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
if (err)
return err;
if (default_acl) {
err = __hfsplus_set_posix_acl(inode, default_acl,
ACL_TYPE_DEFAULT);
posix_acl_release(default_acl);
}
if (acl) {
if (!err)
err = __hfsplus_set_posix_acl(inode, acl,
ACL_TYPE_ACCESS);
posix_acl_release(acl);
}
return err;
}

4
fs/hfsplus/super.c
View file

@ -564,8 +564,8 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
goto out_put_hidden_dir;
}
err = hfsplus_init_inode_security(sbi->hidden_dir,
root, &str);
err = hfsplus_init_security(sbi->hidden_dir,
root, &str);
if (err == -EOPNOTSUPP)
err = 0; /* Operation is not supported. */
else if (err) {

6
fs/hfsplus/xattr.c
View file

@ -8,10 +8,8 @@
*/
#include "hfsplus_fs.h"
#include <linux/posix_acl_xattr.h>
#include <linux/nls.h>
#include "xattr.h"
#include "acl.h"
static int hfsplus_removexattr(struct inode *inode, const char *name);
@ -19,10 +17,6 @@ const struct xattr_handler *hfsplus_xattr_handlers[] = {
&hfsplus_xattr_osx_handler,
&hfsplus_xattr_user_handler,
&hfsplus_xattr_trusted_handler,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
&posix_acl_access_xattr_handler,
&posix_acl_default_xattr_handler,
#endif
&hfsplus_xattr_security_handler,
NULL
};

3
fs/hfsplus/xattr.h
View file

@ -38,7 +38,4 @@ ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
int hfsplus_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr);
int hfsplus_init_inode_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr);
#endif

13
fs/hfsplus/xattr_security.c
View file

@ -12,7 +12,6 @@
#include "hfsplus_fs.h"
#include "xattr.h"
#include "acl.h"
static int hfsplus_security_getxattr(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
@ -72,18 +71,6 @@ int hfsplus_init_security(struct inode *inode, struct inode *dir,
&hfsplus_initxattrs, NULL);
}
int hfsplus_init_inode_security(struct inode *inode,
struct inode *dir,
const struct qstr *qstr)
{
int err;
err = hfsplus_init_posix_acl(inode, dir);
if (!err)
err = hfsplus_init_security(inode, dir, qstr);
return err;
}
const struct xattr_handler hfsplus_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.get = hfsplus_security_getxattr,