[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/hfsplus/posix_acl.c b/src/kernel/linux/v4.14/fs/hfsplus/posix_acl.c
new file mode 100644
index 0000000..066114d
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/hfsplus/posix_acl.c
@@ -0,0 +1,144 @@
+// 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;
+}