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12 Commits

Author SHA1 Message Date
Robert Watson
46157a65d7 o As part of the move to not maintaining copies of the vnode owning uid
and gid in the ACL, vaccess_acl_posix1e() was changed to accept
  explicit file_uid and file_gid as arguments.  However, in making the
  change, I explicitly checked file_gid against cr->cr_groups[0], rather
  than using groupmember, resulting in ACL_GROUP_OBJ entries being
  compared to the caller's effective gid only, not the remainder of
  its groups.  This was recently corrected for the version of the
  group call without privilege, but the second test (when privilege is
  added) was missed.  This change replaces an additiona cr->cr_groups[0]
  check with groupmember().

Pointed out by:	jedgar
Reviewed by:	jedgar
Obtained from:	TrustedBSD Project
2001-04-29 19:53:50 +00:00
Thomas Moestl
e15480f8dd Fix a bug introduced in the last commit: vaccess_acl_posix1 only checked
the file gid gainst the egid of the accessing process for the
ACL_GROUP_OBJ case, and ignored supplementary groups.

Approved by:	rwatson
2001-04-23 22:52:26 +00:00
Robert Watson
b114e127e6 In my first reading of POSIX.1e, I misinterpreted handling of the
ACL_USER_OBJ and ACL_GROUP_OBJ fields, believing that modification of the
access ACL could be used by privileged processes to change file/directory
ownership.  In fact, this is incorrect; ACL_*_OBJ (+ ACL_MASK and
ACL_OTHER) should have undefined ae_id fields; this commit attempts
to correct that misunderstanding.

o Modify arguments to vaccess_acl_posix1e() to accept the uid and gid
  associated with the vnode, as those can no longer be extracted from
  the ACL passed as an argument.  Perform all comparisons against
  the passed arguments.  This actually has the effect of simplifying
  a number of components of this call, as well as reducing the indent
  level, but now seperates handling of ACL_GROUP_OBJ from ACL_GROUP.

o Modify acl_posix1e_check() to return EINVAL if the ae_id field of
  any of the ACL_{USER_OBJ,GROUP_OBJ,MASK,OTHER} entries is a value
  other than ACL_UNDEFINED_ID.  As a temporary work-around to allow
  clean upgrades, set the ae_id field to ACL_UNDEFINED_ID before
  each check so that this cannot cause a failure in the short term
  (this work-around will be removed when the userland libraries and
  utilities are updated to take this change into account).

o Modify ufs_sync_acl_from_inode() so that it forces
  ACL_{USER_OBJ,GROUP_OBJ,MASK,OTHER} ae_id fields to ACL_UNDEFINED_ID
  when synchronizing the ACL from the inode.

o Modify ufs_sync_inode_from_acl to not propagate uid and gid
  information to the inode from the ACL during ACL update.  Also
  modify the masking of permission bits that may be set from
  ALLPERMS to (S_IRWXU|S_IRWXG|S_IRWXO), as ACLs currently do not
  carry none-ACCESSPERMS (S_ISUID, S_ISGID, S_ISTXT).

o Modify ufs_getacl() so that when it emulates an access ACL from
  the inode, it initializes the ae_id fields to ACL_UNDEFINED_ID.

o Clean up ufs_setacl() substantially since it is no longer possible
  to perform chown/chgrp operations using vop_setacl(), so all the
  access control for that can be eliminated.

o Modify ufs_access() so that it passes owner uid and gid information
  into vaccess_acl_posix1e().

Pointed out by:	jedger
Obtained from:	TrustedBSD Project
2001-04-17 04:33:34 +00:00
Chris D. Faulhaber
fb1af1f2bf Correct the following defines to match the POSIX.1e spec:
ACL_PERM_EXEC  -> ACL_EXECUTE
  ACL_PERM_READ  -> ACL_READ
  ACL_PERM_WRITE -> ACL_WRITE

Obtained from:	TrustedBSD
2001-04-11 02:19:01 +00:00
Robert Watson
5293465fef o Introduce filesystem-independent POSIX.1e ACL utility routines to
support implementations of ACLs in file systems.  Introduce the
  following new functions:

      vaccess_acl_posix1e()          vaccess() that accepts an ACL
      acl_posix1e_mode_to_perm()     Convert mode bits to ACL rights
      acl_posix1e_mode_to_entry()    Build ACL entry from mode/uid/gid
      acl_posix1e_perms_to_mode()    Generate file mode from ACL
      acl_posix1e_check()            Syntax verification for ACL

  These functions allow a file system to rely on central ACL evaluation
  and syntax checking, as well as providing useful utilities to
  allow ACL-based file systems to generate mode/owner/etc information
  to return via VOP_GETATTR(), and to support file systems that split
  their ACL information over their existing inode storage (mode, uid,
  gid) and extended ACL into extended attributes (additional users,
  groups, ACL mask).

o Add prototypes for exported functions to sys/acl.h, sys/vnode.h

Reviewed by:	trustedbsd-discuss, freebsd-arch
Obtained from:	TrustedBSD Project
2001-03-06 17:28:24 +00:00
John Baldwin
ba88dfc733 Back out proc locking to protect p_ucred for obtaining additional
references along with the actual obtaining of additional references.
2001-01-27 00:01:31 +00:00
John Baldwin
e5690aadaa Proc locking. 2001-01-24 00:35:12 +00:00
Poul-Henning Kamp
959b7375ed Staticize some malloc M_ instances. 2000-12-08 20:09:00 +00:00
Robert Watson
988ee790d4 o Change locking rules for VOP_GETACL() to indicate that vnode locks
must be held when retrieving ACLs from vnodes.  This is required for
  EA-based UFS ACL implementations.
o Update vacl_get_acl() so that it does appropriate vnode locking.
o Remove static from M_ACL malloc define so that it is accessible for
  consumers of ACLs other than in kern_acl.c

Obtained from:	TrustedBSD Project
2000-09-21 18:43:32 +00:00
Poul-Henning Kamp
2c9b67a8df Remove unneeded #include <vm/vm_zone.h>
Generated by:	src/tools/tools/kerninclude
2000-04-30 18:52:11 +00:00
Robert Watson
8f0738756c Fix bde'isms in acl/extattr syscall interface, renaming syscalls to
prettier (?) names, adding some const's around here, et al.

Reviewed by:	bde
2000-01-19 06:07:34 +00:00
Robert Watson
91f37dcba1 Second pass commit to introduce new ACL and Extended Attribute system
calls, vnops, vfsops, both in /kern, and to individual file systems that
require a vfsop_ array entry.

Reviewed by:	eivind
1999-12-19 06:08:07 +00:00