Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / posix_acl.h

diff --git a/kernel/include/linux/posix_acl.h b/kernel/include/linux/posix_acl.h
new file mode 100644 (file)
index 0000000..3e96a6a
--- /dev/null
+++ b/kernel/include/linux/posix_acl.h
@@ -0,0 +1,144 @@
+/*
+  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;
+       union {
+               kuid_t          e_uid;
+               kgid_t          e_gid;
+       };
+};
+
+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
+extern int posix_acl_chmod(struct inode *, umode_t);
+extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **,
+               struct posix_acl **);
+
+extern int simple_set_acl(struct inode *, struct posix_acl *, int);
+extern int simple_acl_create(struct inode *, struct inode *);
+
+struct posix_acl **acl_by_type(struct inode *inode, int type);
+struct posix_acl *get_cached_acl(struct inode *inode, int type);
+struct posix_acl *get_cached_acl_rcu(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);
+
+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 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 */