[PATCH 10/18] hfsplus: use generic posix ACL infrastructure

Christoph Hellwig
2013-12-01T12:07:12Z

[-- Attachment #1: 0010-hfsplus-use-generic-posix-ACL-infrastructure.patch --]
[-- Type: text/plain, Size: 8090 bytes --]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/hfsplus/acl.h | 9 +--
fs/hfsplus/dir.c | 1 +
fs/hfsplus/inode.c | 3 +-
fs/hfsplus/posix_acl.c | 161 +++++-------------------------------------------
fs/hfsplus/xattr.c | 5 +-
fs/hfsplus/xattr.h | 2 -
6 files changed, 24 insertions(+), 157 deletions(-)

diff --git a/fs/hfsplus/acl.h b/fs/hfsplus/acl.h
index 07c0d49..95c8ed9 100644
--- a/fs/hfsplus/acl.h
+++ b/fs/hfsplus/acl.h
@@ -12,16 +12,13 @@

/* posix_acl.c */
struct posix_acl *hfsplus_get_posix_acl(struct inode *inode, int type);
-extern int hfsplus_posix_acl_chmod(struct inode *);
+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
-
-static inline int hfsplus_posix_acl_chmod(struct inode *inode)
-{
- return 0;
-}
+#define hfsplus_set_posix_acl NULL

static inline int hfsplus_init_posix_acl(struct inode *inode, struct inode *dir)
{
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 4a4fea0..9ee6298 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -532,6 +532,7 @@ const struct inode_operations hfsplus_dir_inode_operations = {
.removexattr = hfsplus_removexattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl,
+ .set_acl = hfsplus_set_posix_acl,
#endif
};

diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 37213d0..0034328 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -319,7 +319,7 @@ static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
mark_inode_dirty(inode);

if (attr->ia_valid & ATTR_MODE) {
- error = hfsplus_posix_acl_chmod(inode);
+ error = posix_acl_chmod(inode);
if (unlikely(error))
return error;
}
@@ -393,6 +393,7 @@ static const struct inode_operations hfsplus_file_inode_operations = {
.removexattr = hfsplus_removexattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl,
+ .set_acl = hfsplus_set_posix_acl,
#endif
};

diff --git a/fs/hfsplus/posix_acl.c b/fs/hfsplus/posix_acl.c
index 277942f..c629592 100644
--- a/fs/hfsplus/posix_acl.c
+++ b/fs/hfsplus/posix_acl.c
@@ -56,9 +56,8 @@ struct posix_acl *hfsplus_get_posix_acl(struct inode *inode, int type)
return acl;
}

-static int hfsplus_set_posix_acl(struct inode *inode,
- int type,
- struct posix_acl *acl)
+int hfsplus_set_posix_acl(struct inode *inode, struct posix_acl *acl,
+ int type)
{
int err;
char *xattr_name;
@@ -115,7 +114,7 @@ end_set_acl:
int hfsplus_init_posix_acl(struct inode *inode, struct inode *dir)
{
int err = 0;
- struct posix_acl *acl = NULL;
+ struct posix_acl *default_acl, *acl;

hfs_dbg(ACL_MOD,
"[%s]: ino %lu, dir->ino %lu\n",
@@ -124,151 +123,21 @@ int hfsplus_init_posix_acl(struct inode *inode, struct inode *dir)
if (S_ISLNK(inode->i_mode))
return 0;

- acl = hfsplus_get_posix_acl(dir, ACL_TYPE_DEFAULT);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
-
- if (acl) {
- if (S_ISDIR(inode->i_mode)) {
- err = hfsplus_set_posix_acl(inode,
- ACL_TYPE_DEFAULT,
- acl);
- if (unlikely(err))
- goto init_acl_cleanup;
- }
-
- err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
- if (unlikely(err < 0))
- return err;
-
- if (err > 0)
- err = hfsplus_set_posix_acl(inode,
- ACL_TYPE_ACCESS,
- acl);
- } else
- inode->i_mode &= ~current_umask();
-
-init_acl_cleanup:
- posix_acl_release(acl);
- return err;
-}
-
-int hfsplus_posix_acl_chmod(struct inode *inode)
-{
- int err;
- struct posix_acl *acl;
-
- hfs_dbg(ACL_MOD, "[%s]: ino %lu\n", __func__, inode->i_ino);
-
- if (S_ISLNK(inode->i_mode))
- return -EOPNOTSUPP;
-
- acl = hfsplus_get_posix_acl(inode, ACL_TYPE_ACCESS);
- if (IS_ERR(acl) || !acl)
- return PTR_ERR(acl);
-
- err = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
- if (unlikely(err))
+ err = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
+ if (err)
return err;

- err = hfsplus_set_posix_acl(inode, ACL_TYPE_ACCESS, acl);
- posix_acl_release(acl);
- return err;
-}
-
-static int hfsplus_xattr_get_posix_acl(struct dentry *dentry,
- const char *name,
- void *buffer,
- size_t size,
- int type)
-{
- int err = 0;
- struct posix_acl *acl;
-
- hfs_dbg(ACL_MOD,
- "[%s]: ino %lu, buffer %p, size %zu, type %#x\n",
- __func__, dentry->d_inode->i_ino, buffer, size, type);
-
- if (strcmp(name, "") != 0)
- return -EINVAL;
-
- acl = hfsplus_get_posix_acl(dentry->d_inode, type);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (acl == NULL)
- return -ENODATA;
-
- err = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
- posix_acl_release(acl);
-
- return err;
-}
-
-static int hfsplus_xattr_set_posix_acl(struct dentry *dentry,
- const char *name,
- const void *value,
- size_t size,
- int flags,
- int type)
-{
- int err = 0;
- struct inode *inode = dentry->d_inode;
- struct posix_acl *acl = NULL;
-
- hfs_dbg(ACL_MOD,
- "[%s]: ino %lu, value %p, size %zu, flags %#x, type %#x\n",
- __func__, inode->i_ino, value, size, flags, type);
-
- if (strcmp(name, "") != 0)
- return -EINVAL;
-
- if (!inode_owner_or_capable(inode))
- return -EPERM;
-
- if (value) {
- acl = posix_acl_from_xattr(&init_user_ns, value, size);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- else if (acl) {
- err = posix_acl_valid(acl);
- if (err)
- goto end_xattr_set_acl;
- }
+ if (default_acl) {
+ err = hfsplus_set_posix_acl(inode, default_acl,
+ ACL_TYPE_DEFAULT);
+ posix_acl_release(default_acl);
}

- err = hfsplus_set_posix_acl(inode, type, acl);
-
-end_xattr_set_acl:
- posix_acl_release(acl);
+ if (acl) {
+ if (!err)
+ err = hfsplus_set_posix_acl(inode, acl,
+ ACL_TYPE_ACCESS);
+ posix_acl_release(acl);
+ }
return err;
}
-
-static size_t hfsplus_xattr_list_posix_acl(struct dentry *dentry,
- char *list,
- size_t list_size,
- const char *name,
- size_t name_len,
- int type)
-{
- /*
- * This method is not used.
- * It is used hfsplus_listxattr() instead of generic_listxattr().
- */
- return -EOPNOTSUPP;
-}
-
-const struct xattr_handler hfsplus_xattr_acl_access_handler = {
- .prefix = POSIX_ACL_XATTR_ACCESS,
- .flags = ACL_TYPE_ACCESS,
- .list = hfsplus_xattr_list_posix_acl,
- .get = hfsplus_xattr_get_posix_acl,
- .set = hfsplus_xattr_set_posix_acl,
-};
-
-const struct xattr_handler hfsplus_xattr_acl_default_handler = {
- .prefix = POSIX_ACL_XATTR_DEFAULT,
- .flags = ACL_TYPE_DEFAULT,
- .list = hfsplus_xattr_list_posix_acl,
- .get = hfsplus_xattr_get_posix_acl,
- .set = hfsplus_xattr_set_posix_acl,
-};
diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c
index 3c6136f..bf88baa 100644
--- a/fs/hfsplus/xattr.c
+++ b/fs/hfsplus/xattr.c
@@ -7,6 +7,7 @@
*/

#include "hfsplus_fs.h"
+#include <linux/posix_acl_xattr.h>
#include "xattr.h"
#include "acl.h"

@@ -15,8 +16,8 @@ const struct xattr_handler *hfsplus_xattr_handlers[] = {
&hfsplus_xattr_user_handler,
&hfsplus_xattr_trusted_handler,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
- &hfsplus_xattr_acl_access_handler,
- &hfsplus_xattr_acl_default_handler,
+ &posix_acl_access_xattr_handler,
+ &posix_acl_default_xattr_handler,
#endif
&hfsplus_xattr_security_handler,
NULL
diff --git a/fs/hfsplus/xattr.h b/fs/hfsplus/xattr.h
index 841b569..9e21449 100644
--- a/fs/hfsplus/xattr.h
+++ b/fs/hfsplus/xattr.h
@@ -14,8 +14,6 @@
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_security_handler;

extern const struct xattr_handler *hfsplus_xattr_handlers[];
--
1.7.10.4