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131 lines
3.3 KiB
131 lines
3.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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File: linux/posix_acl.h |
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(C) 2002 Andreas Gruenbacher, <[email protected]> |
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*/ |
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#ifndef __LINUX_POSIX_ACL_H |
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#define __LINUX_POSIX_ACL_H |
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#include <linux/bug.h> |
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#include <linux/slab.h> |
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#include <linux/rcupdate.h> |
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#include <linux/refcount.h> |
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#include <uapi/linux/posix_acl.h> |
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struct user_namespace; |
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struct posix_acl_entry { |
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short e_tag; |
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unsigned short e_perm; |
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union { |
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kuid_t e_uid; |
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kgid_t e_gid; |
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}; |
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}; |
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struct posix_acl { |
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refcount_t a_refcount; |
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struct rcu_head a_rcu; |
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unsigned int a_count; |
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struct posix_acl_entry a_entries[]; |
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}; |
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#define FOREACH_ACL_ENTRY(pa, acl, pe) \ |
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for(pa=(acl)->a_entries, pe=pa+(acl)->a_count; pa<pe; pa++) |
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/* |
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* Duplicate an ACL handle. |
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*/ |
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static inline struct posix_acl * |
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posix_acl_dup(struct posix_acl *acl) |
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{ |
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if (acl) |
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refcount_inc(&acl->a_refcount); |
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return acl; |
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} |
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/* |
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* Free an ACL handle. |
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*/ |
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static inline void |
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posix_acl_release(struct posix_acl *acl) |
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{ |
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if (acl && refcount_dec_and_test(&acl->a_refcount)) |
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kfree_rcu(acl, a_rcu); |
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} |
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/* posix_acl.c */ |
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extern void posix_acl_init(struct posix_acl *, int); |
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extern struct posix_acl *posix_acl_alloc(int, gfp_t); |
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extern struct posix_acl *posix_acl_from_mode(umode_t, gfp_t); |
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extern int posix_acl_equiv_mode(const struct posix_acl *, umode_t *); |
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extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *); |
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extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t); |
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extern struct posix_acl *get_posix_acl(struct inode *, int); |
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extern int set_posix_acl(struct user_namespace *, struct inode *, int, |
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struct posix_acl *); |
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#ifdef CONFIG_FS_POSIX_ACL |
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int posix_acl_chmod(struct user_namespace *, struct inode *, umode_t); |
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extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **, |
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struct posix_acl **); |
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int posix_acl_update_mode(struct user_namespace *, struct inode *, umode_t *, |
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struct posix_acl **); |
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extern int simple_set_acl(struct user_namespace *, struct inode *, |
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struct posix_acl *, int); |
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extern int simple_acl_create(struct inode *, struct inode *); |
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struct posix_acl *get_cached_acl(struct inode *inode, int type); |
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struct posix_acl *get_cached_acl_rcu(struct inode *inode, int type); |
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void set_cached_acl(struct inode *inode, int type, struct posix_acl *acl); |
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void forget_cached_acl(struct inode *inode, int type); |
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void forget_all_cached_acls(struct inode *inode); |
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int posix_acl_valid(struct user_namespace *, const struct posix_acl *); |
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int posix_acl_permission(struct user_namespace *, struct inode *, |
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const struct posix_acl *, int); |
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static inline void cache_no_acl(struct inode *inode) |
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{ |
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inode->i_acl = NULL; |
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inode->i_default_acl = NULL; |
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} |
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#else |
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static inline int posix_acl_chmod(struct user_namespace *mnt_userns, |
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struct inode *inode, umode_t mode) |
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{ |
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return 0; |
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} |
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#define simple_set_acl NULL |
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static inline int simple_acl_create(struct inode *dir, struct inode *inode) |
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{ |
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return 0; |
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} |
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static inline void cache_no_acl(struct inode *inode) |
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{ |
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} |
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static inline int posix_acl_create(struct inode *inode, umode_t *mode, |
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struct posix_acl **default_acl, struct posix_acl **acl) |
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{ |
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*default_acl = *acl = NULL; |
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return 0; |
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} |
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static inline void forget_all_cached_acls(struct inode *inode) |
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{ |
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} |
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#endif /* CONFIG_FS_POSIX_ACL */ |
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struct posix_acl *get_acl(struct inode *inode, int type); |
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#endif /* __LINUX_POSIX_ACL_H */
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