search for: idmap_hash

Is it possible for the uid/gid numbers that are generated by the idmap_rid and idmap_hash to collide if there are a large number of users or groups? I cannot seem to find any documentation on the limitations of these plugins. Before using I want to make absolutely sure that there won't be any collisions. In doing some research about Likewise Open, I see it's hashing routine c...

I was looking through the change log of 3.3.0 and noticed that a new idmap_hash was introduced that seems to play well with trusted domains. What means are available to convert all my rids to this new hash so I can update file permissions? Thanks, Robert LeBlanc Life Sciences & Undergraduate Education Computer Support Brigham Young University

Hello. hash_rid() in idmap_hash.c[0] has a comment saying the rid is hashed to 20 bit for supporting 100K SIDs: 66 static uint32_t hash_rid(uint32_t rid) 67 { 68 /* 20 bits for the rid which allows us to support 69 the first 100K users/groups in a domain */ 70 71 return (rid & 0x0007FFFF...

I just got an INTERNAL ERROR: Signal 11 in smbd (4.12.10) in something that sids_to_unixids() in source3/winbindd/idmap_hash/idmap_has.c calls and 3 levels down - unfortunately the stack trace doesn?t say what it is - probably optimised into inline code or something. Recently upgraded from Samba 4.12.5 to 4.12.10 (self-compiled). FreeBSD 12.2 It happened right after 10 hours since that smbd processes started so the 10...

...n = Yes > workgroup = TESTLAB > fruit:nfs_aces = No > idmap config * : range = 10000-4000000000 > idmap config * : backend = hash That is what I was looking for, the default 'idmap config' is set to 'hash', which shouldn't be used. Especially as it says 'idmap_hash - DO NOT USE THIS BACKEND' at the top of 'man idmap_hash'. I can understand using it for existing systems, but not for new ones. Lets get this right (and I got it wrong last time, what do you expect, I would never use idmap_hash, it has problems and the rid backend works better), the i...

...ocess better. > > Thank You, > > Is winbind running ? Are you using sssd ? To be honest, your 'idmap config' block isn't correct, you have: idmap config * : range = 10000-4000000000 idmap config * : backend = hash Lets start with the idmap backend. If you run 'man idmap_hash', the very top of that file has this: IDMAP_HASH(8) System Administration tools IDMAP_HASH(8) NAME idmap_hash - DO NOT USE THIS BACKEND Never mind that you should really only use the 'tdb' backend with the default (*) domain, the manpage itself tells you not to use...

On 10/11/2020 21:42, Peter Eriksson via samba wrote: > I just got an INTERNAL ERROR: Signal 11 in smbd (4.12.10) in something that sids_to_unixids() in source3/winbindd/idmap_hash/idmap_has.c calls and 3 levels down - unfortunately the stack trace doesn?t say what it is - probably optimised into inline code or something. > > Recently upgraded from Samba 4.12.5 to 4.12.10 (self-compiled). FreeBSD 12.2 > > It happened right after 10 hours since that smbd processes...

...nd the first match when grepping? My bad. Then it?s probably the variant found in source3/passdb/lookup_sid.c or perhaps something in source3/winbbind/idmap_ad or source3/winbindd/idmap_tdb that is causing the signal 11.. (We use idmap backends tdb & ad) - Peter > Have you read 'man idmap_hash' ? > > If you did, did you miss this at the top: > > idmap_hash - DO NOT USE THIS BACKEND > > > Please do not use idmap_hash > > Rowland > > > > -- > To unsubscribe from this list go to the following URL and read the > instructions: https:/...

...mba properly do the reverse id resolution for the sids to the name on the new domain, that is problematic for us since we are using idmap_rid which would allow some id collisions due to the fact that there are multiple domains involved. There are a huge number of objects so I don't want to use idmap_hash or divide up the id pool within idmap_rid. Just for testing I tried using idmap_hash and it does not get rid of the errors. I'm assuming that setting 'allow trusted domains = yes' would allow resolution of those groups as long as the old domains were still available, however I cannot...

On Wednesday, 24 January 2024 at 10:51, Rowland Penny via samba <samba at lists.samba.org> wrote: > I rearranged the smb.conf above and added comments: > > [global] > netbios name = Tower > server string = Media server > security = USER > workgroup = WORKGROUP > bind interfaces only = yes > interfaces = 192.168.66.10/24 127.0.0.1 > > # we don't do

...ualified name. While the new "hash" module utilizes a local file to map "short_name = QUALIFIED\name". Both user and group name mapping is supported. Please refer to the "winbind nss info" option in smb.conf(5) and to individual plugin man pages for further details. idmap_hash ========== The idmap_hash plugin provides similar support as the idmap_rid module. However, uids and gids are generated from the full domain SID using a hashing algorithm that maps the lower 19 bits from the user or group RID to bits 0 - 19 in the Unix id and hashes 96 bits from the domain SID to...

...ualified name. While the new "hash" module utilizes a local file to map "short_name = QUALIFIED\name". Both user and group name mapping is supported. Please refer to the "winbind nss info" option in smb.conf(5) and to individual plugin man pages for further details. idmap_hash ========== The idmap_hash plugin provides similar support as the idmap_rid module. However, uids and gids are generated from the full domain SID using a hashing algorithm that maps the lower 19 bits from the user or group RID to bits 0 - 19 in the Unix id and hashes 96 bits from the domain SID to...

...--localstatedir=/var \ --with-rootsbindir=/sbin \ --with-syslog \ --with-utmp \ --with-readline \ --with-libsmbclient \ --with-winbind \ --with-shared-modules=idmap_rid,idmap_ad,idmap_adex,idmap_hash \ --without-automount \ --with-ldap \ --with-ads \ --without-smbmount \ --without-dnsupdate \ --without-libtalloc \ --without-libtdb \ --without-libnetapi \...

On Wednesday, 24 January 2024 at 20:45, Rowland Penny via samba <samba at lists.samba.org> wrote: > That is what I was looking for, the default 'idmap config' is set to > 'hash', which shouldn't be used. Especially as it says 'idmap_hash - DO > NOT USE THIS BACKEND' at the top of 'man idmap_hash'. I can understand > using it for existing systems, but not for new ones. > > Lets get this right (and I got it wrong last time, what do you expect, > I would never use idmap_hash, it has problems and the rid back...

...ualified name. While the new "hash" module utilizes a local file to map "short_name = QUALIFIED\name". Both user and group name mapping is supported. Please refer to the "winbind nss info" option in smb.conf(5) and to individual plugin man pages for further details. idmap_hash ========== The idmap_hash plugin provides similar support as the idmap_rid module. However, uids and gids are generated from the full domain SID using a hashing algorithm that maps the lower 19 bits from the user or group RID to bits 0 - 19 in the Unix id and hashes 96 bits from the domain SID to...

...ualified name. While the new "hash" module utilizes a local file to map "short_name = QUALIFIED\name". Both user and group name mapping is supported. Please refer to the "winbind nss info" option in smb.conf(5) and to individual plugin man pages for further details. idmap_hash ========== The idmap_hash plugin provides similar support as the idmap_rid module. However, uids and gids are generated from the full domain SID using a hashing algorithm that maps the lower 19 bits from the user or group RID to bits 0 - 19 in the Unix id and hashes 96 bits from the domain SID to...

Hello, I'm unable to update my Samba from 4.1.17 to 4.4.2. I'm looking to build from tar instead. From what I gather the following should be the steps taken. ./configure --without-ad-dc -- sbindir= /usr/sbin --sysconfdir=/etc/samba/ --/usr/share/man/ make make install Am I missing something else? Thanks. -- -James

...ualified name. While the new "hash" module utilizes a local file to map "short_name = QUALIFIED\name". Both user and group name mapping is supported. Please refer to the "winbind nss info" option in smb.conf(5) and to individual plugin man pages for further details. idmap_hash ========== The idmap_hash plugin provides similar support as the idmap_rid module. However, uids and gids are generated from the full domain SID using a hashing algorithm that maps the lower 19 bits from the user or group RID to bits 0 - 19 in the Unix id and hashes 96 bits from the domain SID to...

...ualified name. While the new "hash" module utilizes a local file to map "short_name = QUALIFIED\name". Both user and group name mapping is supported. Please refer to the "winbind nss info" option in smb.conf(5) and to individual plugin man pages for further details. idmap_hash ========== The idmap_hash plugin provides similar support as the idmap_rid module. However, uids and gids are generated from the full domain SID using a hashing algorithm that maps the lower 19 bits from the user or group RID to bits 0 - 19 in the Unix id and hashes 96 bits from the domain SID to...

...swd \ --with-piddir=/var/run/samba \ --with-pammodulesdir=/lib/x86_64-linux-gnu/security \ --with-pam \ --with-syslog \ --with-utmp \ --with-winbind \ --with-shared-modules=idmap_rid,idmap_ad,idmap_adex,idmap_hash,idmap_ldap,idmap_tdb2,vfs_dfs_samba4,auth_samba4 \ --with-automount \ --with-ldap \ --with-ads \ --with-dnsupdate \ --with-gpgme \ --libdir=/usr/lib/x86_64-linux-gnu \ --with-modulesdir=/...