genfs(9) - NetBSD Manual Pages

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GENFS(9)               NetBSD Kernel Developer's Manual               GENFS(9)


NAME
genfs -- genfs routines
SYNOPSIS
#include <miscfs/genfs/genfs.h> int genfs_can_access(vnode_t *vp, kauth_cred_t cred, uid_t uid, gid_t gid, mode_t file_mode, struct acl *acl, accmode_t accmode); int genfs_can_chflags(vnode_t *vp, kauth_cred_t, cred", uid_t owner_uid, bool changing_sysflags); int genfs_can_chmod(vnode_t *vp, kauth_cred_t cred, uid_t cur_uid, gid_t cur_gid, mode_t new_mode); int genfs_can_chown(vnode_t *vp, kauth_cred_t cred, uid_t cur_uid, gid_t cur_gid, uid_t new_uid, gid_t new_gid); int genfs_can_chtimes(vnode_t *vp, kauth_cred_t cred, uid_t owner_uid, u_int vaflags); int genfs_can_extattr(vnode_t *vp, kauth_cred_t cred, accmode_t accmode, int attrnamespace); int genfs_can_sticky(vnode_t *vp, kauth_cred_t cred, uid_t dir_uid, uid_t file_uid);
DESCRIPTION
The functions documented here are general routines for internal use in file systems to implement common policies for performing various opera- tions. The developer must understand that these routines implement no system-wide policies and only take into account the object being accessed and the nominal values of the credentials accessing it. In other words, these functions are not meant to be called directly. They are intended to be used in kauth(9) vnode scope authorization calls, for providing the fall-back file system decision. As a rule of thumb, code that looks like this is wrong: error = genfs_can_foo(...); /* WRONG */ While code that looks like this is right: error = kauth_authorize_vnode(..., genfs_can_foo(...));
FUNCTIONS
genfs_can_access(vnode_t *vp, kauth_cred_t cred, uid_t uid, gid_t gid, mode_t file_mode, struct acl *, accmode_t accmode) Implements file access checking based on traditional Unix per- missions. genfs_can_chflags(vnode_t *vp, kauth_cred_t cred) "uid_t owner_uid" "bool changing_sysflags" Implements chflags(2) policy. genfs_can_chmod(vnode_t *vp, kauth_cred_t cred, uid_t cur_uid, gid_t cur_gid, mode_t new_mode) Implements chmod(2) policy. genfs_can_chown(vnode_t *vp, kauth_cred_t cred, uid_t cur_uid, gid_t cur_gid, uid_t new_uid, gid_t new_gid) Implements chown(2) policy. genfs_can_chtimes(vnode_t *vp, kauth_cred_t cred, uid_t owner_uid, u_int vaflags) Implements utimes(2) policy. genfs_can_extattr(vnode_t *vp, kauth_cred_t cred, accmode_t accmode, int attrnamespace) Implements extended attributes access policy. genfs_can_sticky(vnode_t *vp, kauth_cred_t cred, uid_t dir_uid, uid_t file_uid) Implements rename and delete policy from sticky directories.
SEE ALSO
kauth(9)
AUTHORS
Elad Efrat <elad@NetBSD.org> wrote this manual page. NetBSD 9.99 August 7, 2020 NetBSD 9.99
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