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posix_acl_xattr.h
/* SPDX-License-Identifier: GPL-2.0 */ /* File: linux/posix_acl_xattr.h Extended attribute system call representation of Access Control Lists. Copyright (C) 2000 by Andreas Gruenbacher <a.gruenbacher@computer.org> Copyright (C) 2002 SGI - Silicon Graphics, Inc <linux-xfs@oss.sgi.com> */ #ifndef _POSIX_ACL_XATTR_H #define _POSIX_ACL_XATTR_H #include <uapi/linux/xattr.h> #include <uapi/linux/posix_acl_xattr.h> #include <linux/posix_acl.h> static inline size_t posix_acl_xattr_size(int count) { return (sizeof(struct posix_acl_xattr_header) + (count * sizeof(struct posix_acl_xattr_entry))); } static inline int posix_acl_xattr_count(size_t size) { if (size < sizeof(struct posix_acl_xattr_header)) return -1; size -= sizeof(struct posix_acl_xattr_header); if (size % sizeof(struct posix_acl_xattr_entry)) return -1; return size / sizeof(struct posix_acl_xattr_entry); } #ifdef CONFIG_FS_POSIX_ACL void posix_acl_fix_xattr_from_user(struct user_namespace *mnt_userns, void *value, size_t size); void posix_acl_fix_xattr_to_user(struct user_namespace *mnt_userns, void *value, size_t size); #else static inline void posix_acl_fix_xattr_from_user(struct user_namespace *mnt_userns, void *value, size_t size) { } static inline void posix_acl_fix_xattr_to_user(struct user_namespace *mnt_userns, void *value, size_t size) { } #endif struct posix_acl *posix_acl_from_xattr(struct user_namespace *user_ns, const void *value, size_t size); int posix_acl_to_xattr(struct user_namespace *user_ns, const struct posix_acl *acl, void *buffer, size_t size); extern const struct xattr_handler posix_acl_access_xattr_handler; extern const struct xattr_handler posix_acl_default_xattr_handler; #endif /* _POSIX_ACL_XATTR_H */