From: Vyacheslav Dubeyko <slava@xxxxxxxxxxx>
Subject: [PATCH 3/3] hfsplus: integrate POSIX ACLs support into driver
This patch integrates implemented POSIX ACLs support into
hfsplus driver.
Signed-off-by: Vyacheslav Dubeyko <slava@xxxxxxxxxxx>
CC: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
CC: Christoph Hellwig <hch@xxxxxxxxxxxxx>
CC: Hin-Tak Leung <htl10@xxxxxxxxxxxxxxxxxxxxx>
---
fs/hfsplus/Makefile | 2 ++
fs/hfsplus/dir.c | 4 +++
fs/hfsplus/inode.c | 11 ++++++++
fs/hfsplus/xattr.c | 62 ++++++++++++++++++++++++++++++++++++++-----
fs/hfsplus/xattr.h | 33 +++++++++--------------
fs/hfsplus/xattr_security.c | 13 +++++++++
6 files changed, 99 insertions(+), 26 deletions(-)
diff --git a/fs/hfsplus/Makefile b/fs/hfsplus/Makefile
index 09d278b..683fca2 100644
--- a/fs/hfsplus/Makefile
+++ b/fs/hfsplus/Makefile
@@ -7,3 +7,5 @@ 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
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index a37ac93..b4d6d74 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -16,6 +16,7 @@
#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)
@@ -533,6 +534,9 @@ const struct inode_operations hfsplus_dir_inode_operations = {
.getxattr = generic_getxattr,
.listxattr = hfsplus_listxattr,
.removexattr = hfsplus_removexattr,
+#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
+ .get_acl = hfsplus_get_posix_acl,
+#endif
};
const struct file_operations hfsplus_dir_operations = {
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index f833d35..4d2edae 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -19,6 +19,7 @@
#include "hfsplus_fs.h"
#include "hfsplus_raw.h"
#include "xattr.h"
+#include "acl.h"
static int hfsplus_readpage(struct file *file, struct page *page)
{
@@ -316,6 +317,13 @@ 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 = hfsplus_posix_acl_chmod(inode);
+ if (unlikely(error))
+ return error;
+ }
+
return 0;
}
@@ -383,6 +391,9 @@ static const struct inode_operations hfsplus_file_inode_operations = {
.getxattr = generic_getxattr,
.listxattr = hfsplus_listxattr,
.removexattr = hfsplus_removexattr,
+#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
+ .get_acl = hfsplus_get_posix_acl,
+#endif
};
static const struct file_operations hfsplus_file_operations = {
diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c
index f663461..bd8471f 100644
--- a/fs/hfsplus/xattr.c
+++ b/fs/hfsplus/xattr.c
@@ -8,11 +8,16 @@
#include "hfsplus_fs.h"
#include "xattr.h"
+#include "acl.h"
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
+ &hfsplus_xattr_acl_access_handler,
+ &hfsplus_xattr_acl_default_handler,
+#endif
&hfsplus_xattr_security_handler,
NULL
};
@@ -46,11 +51,58 @@ static inline int is_known_namespace(const char *name)
return true;
}
+static int can_set_system_xattr(struct inode *inode, const char *name,
+ const void *value, size_t size)
+{
+#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
+ struct posix_acl *acl;
+ int err;
+
+ if (!inode_owner_or_capable(inode))
+ return -EPERM;
+
+ /*
+ * POSIX_ACL_XATTR_ACCESS is tied to i_mode
+ */
+ if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0) {
+ acl = posix_acl_from_xattr(&init_user_ns, value, size);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ if (acl) {
+ err = posix_acl_equiv_mode(acl, &inode->i_mode);
+ posix_acl_release(acl);
+ if (err < 0)
+ return err;
+ mark_inode_dirty(inode);
+ }
+ /*
+ * We're changing the ACL. Get rid of the cached one
+ */
+ forget_cached_acl(inode, ACL_TYPE_ACCESS);
+
+ return 0;
+ } else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) {
+ acl = posix_acl_from_xattr(&init_user_ns, value, size);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ posix_acl_release(acl);
+
+ /*
+ * We're changing the default ACL. Get rid of the cached one
+ */
+ forget_cached_acl(inode, ACL_TYPE_DEFAULT);
+
+ return 0;
+ }
+#endif /* CONFIG_HFSPLUS_FS_POSIX_ACL */
+ return -EOPNOTSUPP;
+}
+
static int can_set_xattr(struct inode *inode, const char *name,
const void *value, size_t value_len)
{
if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return -EOPNOTSUPP; /* TODO: implement ACL support */
+ return can_set_system_xattr(inode, name, value, value_len);
if (!strncmp(name, XATTR_MAC_OSX_PREFIX, XATTR_MAC_OSX_PREFIX_LEN)) {
/*
@@ -253,11 +305,10 @@ static int copy_name(char *buffer, const char *xattr_name, int name_len)
return len;
}
-static ssize_t hfsplus_getxattr_finder_info(struct dentry *dentry,
+static ssize_t hfsplus_getxattr_finder_info(struct inode *inode,
void *value, size_t size)
{
ssize_t res = 0;
- struct inode *inode = dentry->d_inode;
struct hfs_find_data fd;
u16 entry_type;
u16 folder_rec_len = sizeof(struct DInfo) + sizeof(struct DXInfo);
@@ -304,10 +355,9 @@ end_getxattr_finder_info:
return res;
}
-ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
+ssize_t __hfsplus_getxattr(struct inode *inode, const char *name,
void *value, size_t size)
{
- struct inode *inode = dentry->d_inode;
struct hfs_find_data fd;
hfsplus_attr_entry *entry;
__be32 xattr_record_type;
@@ -333,7 +383,7 @@ ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
}
if (!strcmp_xattr_finder_info(name))
- return hfsplus_getxattr_finder_info(dentry, value, size);
+ return hfsplus_getxattr_finder_info(inode, value, size);
if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
return -EOPNOTSUPP;
diff --git a/fs/hfsplus/xattr.h b/fs/hfsplus/xattr.h
index 847b695..841b569 100644
--- a/fs/hfsplus/xattr.h
+++ b/fs/hfsplus/xattr.h
@@ -14,8 +14,8 @@
extern const struct xattr_handler hfsplus_xattr_osx_handler;
extern const struct xattr_handler hfsplus_xattr_user_handler;
extern const struct xattr_handler hfsplus_xattr_trusted_handler;
-/*extern const struct xattr_handler hfsplus_xattr_acl_access_handler;*/
-/*extern const struct xattr_handler hfsplus_xattr_acl_default_handler;*/
+extern const struct xattr_handler hfsplus_xattr_acl_access_handler;
+extern const struct xattr_handler hfsplus_xattr_acl_default_handler;
extern const struct xattr_handler hfsplus_xattr_security_handler;
extern const struct xattr_handler *hfsplus_xattr_handlers[];
@@ -29,9 +29,17 @@ static inline int hfsplus_setxattr(struct dentry *dentry, const char *name,
return __hfsplus_setxattr(dentry->d_inode, name, value, size, flags);
}
-ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
+ssize_t __hfsplus_getxattr(struct inode *inode, const char *name,
void *value, size_t size);
+static inline ssize_t hfsplus_getxattr(struct dentry *dentry,
+ const char *name,
+ void *value,
+ size_t size)
+{
+ return __hfsplus_getxattr(dentry->d_inode, name, value, size);
+}
+
ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
int hfsplus_removexattr(struct dentry *dentry, const char *name);
@@ -39,22 +47,7 @@ int hfsplus_removexattr(struct dentry *dentry, const char *name);
int hfsplus_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr);
-static inline int hfsplus_init_acl(struct inode *inode, struct inode *dir)
-{
- /*TODO: implement*/
- return 0;
-}
-
-static inline int hfsplus_init_inode_security(struct inode *inode,
- struct inode *dir,
- const struct qstr *qstr)
-{
- int err;
-
- err = hfsplus_init_acl(inode, dir);
- if (!err)
- err = hfsplus_init_security(inode, dir, qstr);
- return err;
-}
+int hfsplus_init_inode_security(struct inode *inode, struct inode *dir,
+ const struct qstr *qstr);
#endif
diff --git a/fs/hfsplus/xattr_security.c b/fs/hfsplus/xattr_security.c
index 83b842f..0072276 100644
--- a/fs/hfsplus/xattr_security.c
+++ b/fs/hfsplus/xattr_security.c
@@ -9,6 +9,7 @@
#include <linux/security.h>
#include "hfsplus_fs.h"
#include "xattr.h"
+#include "acl.h"
static int hfsplus_security_getxattr(struct dentry *dentry, const char *name,
void *buffer, size_t size, int type)
@@ -96,6 +97,18 @@ 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,
.list = hfsplus_security_listxattr,
--
1.7.9.5
--
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