10-08-2010
GID mappings cached?
We had a mapping to one UNIX box just fine, the server was changed to another UNIX box and now when mapping drives from Windows box to new UNIX box, we get the old GID associated with our Windows user. When checking on new UNIX box, we see GID of 108, which is what we want, but when we map the drive (successfully), and create a directory, it is permissioned to the correct UID, but the GID is 109(the old GID on the old UNIX box). Is this caching somewhere? We restarted NFSD. We can create a directory, and delete it, but can't rename it even though it is owned by the right UID even though GID is off? Thanks for any advice....
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----------------------------------
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LEARN ABOUT SUSE
idmap_rid
IDMAP_RID(8) System Administration tools IDMAP_RID(8)
NAME
idmap_rid - Samba's idmap_rid Backend for Winbind
DESCRIPTION
The idmap_rid backend provides a way to use an algorithmic mapping scheme to map UIDs/GIDs and SIDs. No database is required in this case
as the mapping is deterministic.
IDMAP OPTIONS
range = low - high
Defines the available matching uid and gid range for which the backend is authoritative. Note that the range acts as a filter. If
algorithmically determined UID or GID fall outside the range, they are ignored and the corresponding map is discarded. It is intended
as a way to avoid accidental UID/GID overlaps between local and remotely defined IDs.
base_rid = INTEGER
Defines the base integer used to build SIDs out of a UID or a GID, and to rebase the UID or GID to be obtained from a SID. This means
SIDs with a RID less than the base rid are filtered. The default is not to restrict the allowed rids at all, i.e. a base_rid value of
0. A good value for the base_rid can be 1000, since user RIDs by default start at 1000 (512 hexadecimal).
Use of this parameter is deprecated.
THE MAPPING FORMULAS
The Unix ID for a RID is calculated this way:
ID = RID - BASE_RID + LOW_RANGE_ID.
Correspondingly, the formula for calculating the RID for a given Unix ID is this:
RID = ID + BASE_RID - LOW_RANGE_ID.
EXAMPLES
This example shows how to configure two domains with idmap_rid, the principal domain and a trusted domain, leaving the default id mapping
scheme at tdb. The example also demonstrates the use of the base_rid parameter for the trusted domain.
[global]
security = domain
workgroup = MAIN
idmap backend = tdb
idmap uid = 1000000-1999999
idmap gid = 1000000-1999999
idmap config MAIN : backend = rid
idmap config MAIN : range = 10000 - 49999
idmap config TRUSTED : backend = rid
idmap config TRUSTED : range = 50000 - 99999
idmap config TRUSTED : base_rid = 1000
AUTHOR
The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by the Samba Team as an Open
Source project similar to the way the Linux kernel is developed.
Samba 3.5 06/18/2010 IDMAP_RID(8)