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Replace the remaining KAUTH_GENERIC_ISSUSER authorization calls with
something meaningful. All relevant documentation has been updated or
written.
Most of these changes were brought up in the following messages:
http://mail-index.netbsd.org/tech-kern/2012/01/18/msg012490.html
http://mail-index.netbsd.org/tech-kern/2012/01/19/msg012502.html
http://mail-index.netbsd.org/tech-kern/2012/02/17/msg012728.html
Thanks to christos, manu, njoly, and jmmv for input.
Huge thanks to pgoyette for spinning these changes through some build
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| .\" $NetBSD: genfs.9,v 1.1 2012/03/13 18:40:27 elad Exp $ | ||
| .\" | ||
| .\" Copyright 2012 Elad Efrat <[email protected]> | ||
| .\" All rights reserved. | ||
| .\" | ||
| .\" Redistribution and use in source and binary forms, with or without | ||
| .\" modification, are permitted provided that the following conditions | ||
| .\" are met: | ||
| .\" 1. Redistributions of source code must retain the above copyright | ||
| .\" notice, this list of conditions and the following disclaimer. | ||
| .\" 2. Redistributions in binary form must reproduce the above copyright | ||
| .\" notice, this list of conditions and the following disclaimer in the | ||
| .\" documentation and/or other materials provided with the distribution. | ||
| .\" 3. The name of the author may not be used to endorse or promote products | ||
| .\" derived from this software without specific prior written permission. | ||
| .\" | ||
| .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | ||
| .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | ||
| .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | ||
| .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | ||
| .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
| .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
| .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
| .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
| .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| .\" POSSIBILITY OF SUCH DAMAGE. | ||
| .\" | ||
| .Dd March 1, 2012 | ||
| .Dt GENFS 9 | ||
| .Os | ||
| .Sh NAME | ||
| .Nm genfs | ||
| .Nd genfs routines | ||
| .Sh SYNOPSIS | ||
| .In miscfs/genfs/genfs.h | ||
| .Ft int | ||
| .Fn genfs_can_access "enum vtype type" "mode_t file_mode" "uid_t uid" \ | ||
| "gid_t gid" "mode_t acc_mode" "kauth_cred_t cred" | ||
| .Ft int | ||
| .Fn genfs_can_chmod "enum vtype type" "kauth_cred_t cred" "uid_t cur_uid" \ | ||
| "gid_t cur_gid" "mode_t new_mode" | ||
| .Ft int | ||
| .Fn genfs_can_chown "kauth_cred_t cred" "uid_t cur_uid" "gid_t cur_gid" \ | ||
| "uid_t new_uid" "gid_t new_gid" | ||
| .Ft int | ||
| .Fn genfs_can_chtimes "vnode_t *vp" "u_int vaflags" "uid_t owner_uid" \ | ||
| "kauth_cred_t cred" | ||
| .Ft int | ||
| .Fn genfs_can_chflags "kauth_cred_t cred" "enum vtype type" "uid_t owner_uid" \ | ||
| "bool changing_sysflags" | ||
| .Ft int | ||
| .Fn genfs_can_sticky "kauth_cred_t cred" "uid_t dir_uid" "uid_t file_uid" | ||
| .Ft int | ||
| .Fn genfs_can_extattr "kauth_cred_t cred" "int access_mode" "vnode_t *vp" \ | ||
| "const char *attr" | ||
| .Sh DESCRIPTION | ||
| The functions documented here are general routines for internal use in | ||
| file-systems to implement common policies for performing various operations. | ||
| 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. | ||
| .Pp | ||
| In other words, these functions are not meant to be called direcly. | ||
| They are intended to be used in | ||
| .Xr kauth 9 | ||
| vnode scope authorization calls, for providing the fall-back file-system | ||
| decision. | ||
| .Pp | ||
| As a rule of thumb, code that looks like this is wrong: | ||
| .Bd -literal -offset indent | ||
| error = genfs_can_foo(...); /* WRONG */ | ||
| .Ed | ||
| .Pp | ||
| While code that looks like this is right: | ||
| .Bd -literal -offset indent | ||
| error = kauth_authorize_vnode(..., genfs_can_foo(...)); | ||
| .Ed | ||
| .Sh FUNCTIONS | ||
| .Bl -tag -width compact | ||
| .It Fn genfs_can_access "enum vtype type" "mode_t file_mode" "uid_t uid" \ | ||
| "gid_t gid" "mode_t acc_mode" "kauth_cred_t cred" | ||
| Implements file access checking based on traditional Unix permissions. | ||
| .It Fn genfs_can_chmod "enum vtype type" "kauth_cred_t cred" "uid_t cur_uid" \ | ||
| "gid_t cur_gid" "mode_t new_mode" | ||
| Implements | ||
| .Xr chmod 2 | ||
| policy. | ||
| .It Fn genfs_can_chown "kauth_cred_t cred" "uid_t cur_uid" "gid_t cur_gid" \ | ||
| "uid_t new_uid" "gid_t new_gid" | ||
| Implements | ||
| .Xr chown 2 | ||
| policy. | ||
| .It Fn genfs_can_chtimes "vnode_t *vp" "u_int vaflags" "uid_t owner_uid" \ | ||
| "kauth_cred_t cred" | ||
| Implements | ||
| .Xr utimes 2 | ||
| policy. | ||
| .It Fn genfs_can_chflags "kauth_cred_t cred" "enum vtype type" \ | ||
| "uid_t owner_uid" "bool changing_sysflags" | ||
| Implements | ||
| .Xr chflags 2 | ||
| policy. | ||
| .It Fn genfs_can_sticky "kauth_cred_t cred" "uid_t dir_uid" "uid_t file_uid" | ||
| Implements rename and delete policy from sticky directories. | ||
| .It Fn genfs_can_extattr "kauth_cred_t cred" "int access_mode" "vnode_t *vp" \ | ||
| "const char *attr" | ||
| Implements extended attributes access policy. | ||
| .El | ||
| .Sh SEE ALSO | ||
| .Xr kauth 9 | ||
| .Sh AUTHORS | ||
| .An Elad Efrat Aq [email protected] | ||
| wrote this manual page. |
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