diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /include/linux/posix_acl.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/linux/posix_acl.h')
-rw-r--r-- | include/linux/posix_acl.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h new file mode 100644 index 000000000..7d1e604c1 --- /dev/null +++ b/include/linux/posix_acl.h @@ -0,0 +1,133 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + File: linux/posix_acl.h + + (C) 2002 Andreas Gruenbacher, <a.gruenbacher@computer.org> +*/ + + +#ifndef __LINUX_POSIX_ACL_H +#define __LINUX_POSIX_ACL_H + +#include <linux/bug.h> +#include <linux/slab.h> +#include <linux/rcupdate.h> +#include <linux/refcount.h> +#include <uapi/linux/posix_acl.h> + +struct user_namespace; + +struct posix_acl_entry { + short e_tag; + unsigned short e_perm; + union { + kuid_t e_uid; + kgid_t e_gid; + }; +}; + +struct posix_acl { + refcount_t a_refcount; + struct rcu_head a_rcu; + unsigned int a_count; + struct posix_acl_entry a_entries[]; +}; + +#define FOREACH_ACL_ENTRY(pa, acl, pe) \ + for(pa=(acl)->a_entries, pe=pa+(acl)->a_count; pa<pe; pa++) + + +/* + * Duplicate an ACL handle. + */ +static inline struct posix_acl * +posix_acl_dup(struct posix_acl *acl) +{ + if (acl) + refcount_inc(&acl->a_refcount); + return acl; +} + +/* + * Free an ACL handle. + */ +static inline void +posix_acl_release(struct posix_acl *acl) +{ + if (acl && refcount_dec_and_test(&acl->a_refcount)) + kfree_rcu(acl, a_rcu); +} + + +/* posix_acl.c */ + +extern void posix_acl_init(struct posix_acl *, int); +extern struct posix_acl *posix_acl_alloc(int, gfp_t); +extern struct posix_acl *posix_acl_from_mode(umode_t, gfp_t); +extern int posix_acl_equiv_mode(const struct posix_acl *, umode_t *); +extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *); +extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t); + +extern struct posix_acl *get_posix_acl(struct inode *, int); +extern int set_posix_acl(struct user_namespace *, struct inode *, int, + struct posix_acl *); + +struct posix_acl *get_cached_acl_rcu(struct inode *inode, int type); +struct posix_acl *posix_acl_clone(const struct posix_acl *acl, gfp_t flags); + +#ifdef CONFIG_FS_POSIX_ACL +int posix_acl_chmod(struct user_namespace *, struct inode *, umode_t); +extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **, + struct posix_acl **); +int posix_acl_update_mode(struct user_namespace *, struct inode *, umode_t *, + struct posix_acl **); + +extern int simple_set_acl(struct user_namespace *, struct inode *, + struct posix_acl *, int); +extern int simple_acl_create(struct inode *, struct inode *); + +struct posix_acl *get_cached_acl(struct inode *inode, int type); +void set_cached_acl(struct inode *inode, int type, struct posix_acl *acl); +void forget_cached_acl(struct inode *inode, int type); +void forget_all_cached_acls(struct inode *inode); +int posix_acl_valid(struct user_namespace *, const struct posix_acl *); +int posix_acl_permission(struct user_namespace *, struct inode *, + const struct posix_acl *, int); + +static inline void cache_no_acl(struct inode *inode) +{ + inode->i_acl = NULL; + inode->i_default_acl = NULL; +} +#else +static inline int posix_acl_chmod(struct user_namespace *mnt_userns, + struct inode *inode, umode_t mode) +{ + return 0; +} + +#define simple_set_acl NULL + +static inline int simple_acl_create(struct inode *dir, struct inode *inode) +{ + return 0; +} +static inline void cache_no_acl(struct inode *inode) +{ +} + +static inline int posix_acl_create(struct inode *inode, umode_t *mode, + struct posix_acl **default_acl, struct posix_acl **acl) +{ + *default_acl = *acl = NULL; + return 0; +} + +static inline void forget_all_cached_acls(struct inode *inode) +{ +} +#endif /* CONFIG_FS_POSIX_ACL */ + +struct posix_acl *get_acl(struct inode *inode, int type); + +#endif /* __LINUX_POSIX_ACL_H */ |