projects / mirror_ubuntu-eoan-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | /* |
| 3 | File: linux/posix_acl.h | |
| 4 | ||
| 5 | (C) 2002 Andreas Gruenbacher, <a.gruenbacher@computer.org> | |
| 6 | */ | |
| 7 | ||
| 8 | ||
| 9 | #ifndef __LINUX_POSIX_ACL_H | |
| 10 | #define __LINUX_POSIX_ACL_H | |
| 11 | ||
| 187f1882 | 12 | #include <linux/bug.h> |
| 1da177e4 | 13 | #include <linux/slab.h> |
| 3567866b | 14 | #include <linux/rcupdate.h> |
| 66717260 | 15 | #include <linux/refcount.h> |
| bc8bcf3b | 16 | #include <uapi/linux/posix_acl.h> |
| 1da177e4 LT |
17 | |
| 18 | struct posix_acl_entry { | |
| 19 | short e_tag; | |
| 20 | unsigned short e_perm; | |
| 2f6f0654 EB |
21 | union { |
| 22 | kuid_t e_uid; | |
| 23 | kgid_t e_gid; | |
| 2f6f0654 | 24 | }; |
| 1da177e4 LT |
25 | }; |
| 26 | ||
| 27 | struct posix_acl { | |
| 66717260 | 28 | refcount_t a_refcount; |
| 6d4e56ce | 29 | struct rcu_head a_rcu; |
| 1da177e4 LT |
30 | unsigned int a_count; |
| 31 | struct posix_acl_entry a_entries[0]; | |
| 32 | }; | |
| 33 | ||
| 34 | #define FOREACH_ACL_ENTRY(pa, acl, pe) \ | |
| 35 | for(pa=(acl)->a_entries, pe=pa+(acl)->a_count; pa<pe; pa++) | |
| 36 | ||
| 37 | ||
| 38 | /* | |
| 39 | * Duplicate an ACL handle. | |
| 40 | */ | |
| 41 | static inline struct posix_acl * | |
| 42 | posix_acl_dup(struct posix_acl *acl) | |
| 43 | { | |
| 44 | if (acl) | |
| 66717260 | 45 | refcount_inc(&acl->a_refcount); |
| 1da177e4 LT |
46 | return acl; |
| 47 | } | |
| 48 | ||
| 49 | /* | |
| 50 | * Free an ACL handle. | |
| 51 | */ | |
| 52 | static inline void | |
| 53 | posix_acl_release(struct posix_acl *acl) | |
| 54 | { | |
| 66717260 | 55 | if (acl && refcount_dec_and_test(&acl->a_refcount)) |
| 3567866b | 56 | kfree_rcu(acl, a_rcu); |
| 1da177e4 LT |
57 | } |
| 58 | ||
| 59 | ||
| 60 | /* posix_acl.c */ | |
| 61 | ||
| f61f6da0 | 62 | extern void posix_acl_init(struct posix_acl *, int); |
| dd0fc66f | 63 | extern struct posix_acl *posix_acl_alloc(int, gfp_t); |
| 0d4d717f | 64 | extern int posix_acl_valid(struct user_namespace *, const struct posix_acl *); |
| 1da177e4 | 65 | extern int posix_acl_permission(struct inode *, const struct posix_acl *, int); |
| 3a5fba19 | 66 | extern struct posix_acl *posix_acl_from_mode(umode_t, gfp_t); |
| d6952123 | 67 | extern int posix_acl_equiv_mode(const struct posix_acl *, umode_t *); |
| 37bc1539 | 68 | extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *); |
| 5bf3258f | 69 | extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t); |
| 1da177e4 LT |
70 | |
| 71 | extern struct posix_acl *get_posix_acl(struct inode *, int); | |
| 72 | extern int set_posix_acl(struct inode *, int, struct posix_acl *); | |
| 73 | ||
| 641cf4a6 | 74 | #ifdef CONFIG_FS_POSIX_ACL |
| 37bc1539 CH |
75 | extern int posix_acl_chmod(struct inode *, umode_t); |
| 76 | extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **, | |
| 77 | struct posix_acl **); | |
| 07393101 | 78 | extern int posix_acl_update_mode(struct inode *, umode_t *, struct posix_acl **); |
| 5bf3258f | 79 | |
| feda821e CH |
80 | extern int simple_set_acl(struct inode *, struct posix_acl *, int); |
| 81 | extern int simple_acl_create(struct inode *, struct inode *); | |
| 82 | ||
| 0afaa120 AM |
83 | struct posix_acl *get_cached_acl(struct inode *inode, int type); |
| 84 | struct posix_acl *get_cached_acl_rcu(struct inode *inode, int type); | |
| 85 | void set_cached_acl(struct inode *inode, int type, struct posix_acl *acl); | |
| 86 | void forget_cached_acl(struct inode *inode, int type); | |
| 87 | void forget_all_cached_acls(struct inode *inode); | |
| 72c04902 AV |
88 | |
| 89 | static inline void cache_no_acl(struct inode *inode) | |
| 90 | { | |
| 72c04902 AV |
91 | inode->i_acl = NULL; |
| 92 | inode->i_default_acl = NULL; | |
| 72c04902 | 93 | } |
| 5bf3258f | 94 | #else |
| 37bc1539 | 95 | static inline int posix_acl_chmod(struct inode *inode, umode_t mode) |
| 5bf3258f CH |
96 | { |
| 97 | return 0; | |
| 98 | } | |
| 99 | ||
| feda821e CH |
100 | #define simple_set_acl NULL |
| 101 | ||
| 102 | static inline int simple_acl_create(struct inode *dir, struct inode *inode) | |
| 103 | { | |
| 104 | return 0; | |
| 105 | } | |
| 5bf3258f CH |
106 | static inline void cache_no_acl(struct inode *inode) |
| 107 | { | |
| 108 | } | |
| 37bc1539 CH |
109 | |
| 110 | static inline int posix_acl_create(struct inode *inode, umode_t *mode, | |
| 111 | struct posix_acl **default_acl, struct posix_acl **acl) | |
| 112 | { | |
| 113 | *default_acl = *acl = NULL; | |
| 114 | return 0; | |
| 115 | } | |
| 013cdf10 CH |
116 | |
| 117 | static inline void forget_all_cached_acls(struct inode *inode) | |
| 118 | { | |
| 119 | } | |
| 5bf3258f | 120 | #endif /* CONFIG_FS_POSIX_ACL */ |
| 72c04902 | 121 | |
| 2982baa2 | 122 | struct posix_acl *get_acl(struct inode *inode, int type); |
| 72c04902 | 123 | |
| 1da177e4 | 124 | #endif /* __LINUX_POSIX_ACL_H */ |