diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/posix_acl.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/posix_acl.h | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/ANDROID_3.4.5/include/linux/posix_acl.h b/ANDROID_3.4.5/include/linux/posix_acl.h deleted file mode 100644 index 11bad91c..00000000 --- a/ANDROID_3.4.5/include/linux/posix_acl.h +++ /dev/null @@ -1,172 +0,0 @@ -/* - 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> - -#define ACL_UNDEFINED_ID (-1) - -/* a_type field in acl_user_posix_entry_t */ -#define ACL_TYPE_ACCESS (0x8000) -#define ACL_TYPE_DEFAULT (0x4000) - -/* e_tag entry in struct posix_acl_entry */ -#define ACL_USER_OBJ (0x01) -#define ACL_USER (0x02) -#define ACL_GROUP_OBJ (0x04) -#define ACL_GROUP (0x08) -#define ACL_MASK (0x10) -#define ACL_OTHER (0x20) - -/* permissions in the e_perm field */ -#define ACL_READ (0x04) -#define ACL_WRITE (0x02) -#define ACL_EXECUTE (0x01) -//#define ACL_ADD (0x08) -//#define ACL_DELETE (0x10) - -struct posix_acl_entry { - short e_tag; - unsigned short e_perm; - unsigned int e_id; -}; - -struct posix_acl { - union { - atomic_t a_refcount; - struct rcu_head a_rcu; - }; - unsigned int a_count; - struct posix_acl_entry a_entries[0]; -}; - -#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) - atomic_inc(&acl->a_refcount); - return acl; -} - -/* - * Free an ACL handle. - */ -static inline void -posix_acl_release(struct posix_acl *acl) -{ - if (acl && atomic_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 int posix_acl_valid(const struct posix_acl *); -extern int posix_acl_permission(struct inode *, const struct posix_acl *, int); -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 inode *, int, struct posix_acl *); - -#ifdef CONFIG_FS_POSIX_ACL -static inline struct posix_acl **acl_by_type(struct inode *inode, int type) -{ - switch (type) { - case ACL_TYPE_ACCESS: - return &inode->i_acl; - case ACL_TYPE_DEFAULT: - return &inode->i_default_acl; - default: - BUG(); - } -} - -static inline struct posix_acl *get_cached_acl(struct inode *inode, int type) -{ - struct posix_acl **p = acl_by_type(inode, type); - struct posix_acl *acl = ACCESS_ONCE(*p); - if (acl) { - spin_lock(&inode->i_lock); - acl = *p; - if (acl != ACL_NOT_CACHED) - acl = posix_acl_dup(acl); - spin_unlock(&inode->i_lock); - } - return acl; -} - -static inline struct posix_acl *get_cached_acl_rcu(struct inode *inode, int type) -{ - return rcu_dereference(*acl_by_type(inode, type)); -} - -static inline void set_cached_acl(struct inode *inode, - int type, - struct posix_acl *acl) -{ - struct posix_acl **p = acl_by_type(inode, type); - struct posix_acl *old; - spin_lock(&inode->i_lock); - old = *p; - rcu_assign_pointer(*p, posix_acl_dup(acl)); - spin_unlock(&inode->i_lock); - if (old != ACL_NOT_CACHED) - posix_acl_release(old); -} - -static inline void forget_cached_acl(struct inode *inode, int type) -{ - struct posix_acl **p = acl_by_type(inode, type); - struct posix_acl *old; - spin_lock(&inode->i_lock); - old = *p; - *p = ACL_NOT_CACHED; - spin_unlock(&inode->i_lock); - if (old != ACL_NOT_CACHED) - posix_acl_release(old); -} - -static inline void forget_all_cached_acls(struct inode *inode) -{ - struct posix_acl *old_access, *old_default; - spin_lock(&inode->i_lock); - old_access = inode->i_acl; - old_default = inode->i_default_acl; - inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED; - spin_unlock(&inode->i_lock); - if (old_access != ACL_NOT_CACHED) - posix_acl_release(old_access); - if (old_default != ACL_NOT_CACHED) - posix_acl_release(old_default); -} -#endif - -static inline void cache_no_acl(struct inode *inode) -{ -#ifdef CONFIG_FS_POSIX_ACL - inode->i_acl = NULL; - inode->i_default_acl = NULL; -#endif -} - -#endif /* __LINUX_POSIX_ACL_H */ |