xref: /linux/fs/efivarfs/internal.h (revision 2c1ed907520c50326b8f604907a8478b27881a2e)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2012 Red Hat, Inc.
4  * Copyright (C) 2012 Jeremy Kerr <jeremy.kerr@canonical.com>
5  */
6 #ifndef EFIVAR_FS_INTERNAL_H
7 #define EFIVAR_FS_INTERNAL_H
8 
9 #include <linux/efi.h>
10 
11 struct efivarfs_mount_opts {
12 	kuid_t uid;
13 	kgid_t gid;
14 };
15 
16 struct efivarfs_fs_info {
17 	struct efivarfs_mount_opts mount_opts;
18 	struct super_block *sb;
19 	struct notifier_block nb;
20 	struct notifier_block pm_nb;
21 };
22 
23 struct efi_variable {
24 	efi_char16_t  VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
25 	efi_guid_t    VendorGuid;
26 };
27 
28 struct efivar_entry {
29 	struct efi_variable var;
30 	struct inode vfs_inode;
31 	unsigned long open_count;
32 	bool removed;
33 };
34 
efivar_entry(struct inode * inode)35 static inline struct efivar_entry *efivar_entry(struct inode *inode)
36 {
37 	return container_of(inode, struct efivar_entry, vfs_inode);
38 }
39 
40 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
41 		void *data, bool duplicate_check);
42 
43 int efivar_entry_delete(struct efivar_entry *entry);
44 
45 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
46 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
47 		       unsigned long *size, void *data);
48 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
49 		     unsigned long *size, void *data);
50 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
51 			      unsigned long *size, void *data, bool *set);
52 
53 
54 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
55 		     unsigned long data_size);
56 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
57 				  size_t len);
58 char *efivar_get_utf8name(const efi_char16_t *name16, efi_guid_t *vendor);
59 bool efivarfs_variable_is_present(efi_char16_t *variable_name,
60 				  efi_guid_t *vendor, void *data);
61 
62 extern const struct file_operations efivarfs_file_operations;
63 extern const struct inode_operations efivarfs_dir_inode_operations;
64 extern struct inode *efivarfs_get_inode(struct super_block *sb,
65 			const struct inode *dir, int mode, dev_t dev,
66 			bool is_removable);
67 
68 #endif /* EFIVAR_FS_INTERNAL_H */
69