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Fwd: (ITS#7994) [LMDB] Feature Request: Access to current transaction ID.
by dmbarbour＠gmail.com 05 Dec '14

05 Dec '14

--f46d0434c0ba9e39c905097be220 Content-Type: text/plain; charset=UTF-8 I typedef'd MDB_txnid_t at the top of lmdb.h. The patch also tweaks MDB_envinfo. On Fri, Dec 5, 2014 at 11:58 AM, Howard Chu <hyc(a)symas.com> wrote: > > Thanks. There's a slight problem with the patch, your function returns > MDB_txnid_t but that is a private typedef in mdb.c. It is not defined in > lmdb.h, so no one will be able to compile and use this code. > > Easiest change would be to just return size_t, like MDB_envinfo uses. > --f46d0434c0ba9e39c905097be220 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div class=3D"gmail_quote"><br><div dir=3D"ltr">I typedef&= #39;d MDB_txnid_t at the top of lmdb.h. The patch also tweaks MDB_envinfo.<= span class=3D""><div><br></div><div><div class=3D"gmail_extra"><div class= =3D"gmail_quote">On Fri, Dec 5, 2014 at 11:58 AM, Howard Chu <span dir=3D"l= tr"><<a href=3D"mailto:hyc@symas.com" target=3D"_blank">hyc(a)symas.com</a= >></span> wrote:<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 = .8ex;border-left:1px #ccc solid;padding-left:1ex"> Thanks. There's a slight problem with the patch, your function returns = MDB_txnid_t but that is a private typedef in mdb.c. It is not defined in lm= db.h, so no one will be able to compile and use this code.<br> <br> Easiest change would be to just return size_t, like MDB_envinfo uses.<span>= <font color=3D"#888888"><br></font></span></blockquote></div></div></div></= span></div> </div><br></div> --f46d0434c0ba9e39c905097be220--

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Re: (ITS#7994) [LMDB] Feature Request: Access to current transaction ID.
by hyc＠symas.com 05 Dec '14

05 Dec '14

dmbarbour(a)gmail.com wrote: > Full_Name: David Barbour > Version: LMDB 0.9.10 > OS: Ubuntu > URL: ftp://ftp.openldap.org/incoming/ > Submission from: (NULL) (2602:306:80bb:160:d913:da7:da0f:76b3) > > > As discussed on the list [1], I believe access to the current transaction ID > could be very useful for layering features above LMDB, such as concurrent > writers, read-only to read-write promotion, or serving as an e-tag for polling. > > A patch David-Barbour-141205.patch has been uploaded and includes a disclaimer > to public-domain. > > [1] http://www.openldap.org/lists/openldap-devel/201412/msg00000.html > > Thanks. There's a slight problem with the patch, your function returns MDB_txnid_t but that is a private typedef in mdb.c. It is not defined in lmdb.h, so no one will be able to compile and use this code. Easiest change would be to just return size_t, like MDB_envinfo uses. -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/

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(ITS#7994) [LMDB] Feature Request: Access to current transaction ID.
by dmbarbour＠gmail.com 05 Dec '14

05 Dec '14

Full_Name: David Barbour Version: LMDB 0.9.10 OS: Ubuntu URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (2602:306:80bb:160:d913:da7:da0f:76b3) As discussed on the list [1], I believe access to the current transaction ID could be very useful for layering features above LMDB, such as concurrent writers, read-only to read-write promotion, or serving as an e-tag for polling. A patch David-Barbour-141205.patch has been uploaded and includes a disclaimer to public-domain. [1] http://www.openldap.org/lists/openldap-devel/201412/msg00000.html

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Re: (ITS#7993) proxyauth with saslmech EXTERNAL not working
by hyc＠symas.com 05 Dec '14

05 Dec '14

dkastens(a)uos.de wrote: > Full_Name: Dirk Kastens > Version: 2.4.39 > OS: RedHat SL 6.6 > URL: ftp://ftp.openldap.org/incoming/ > Submission from: (NULL) (2001:638:508:3d0:12a:32c6:740c:8971) > > > We installed an ldap cluster with a mirrored master and several replicas on > RedHat SL 6.5 with openldap 2.4.23-34.el6_5.1.x86_64. Write requests to the > replicas are referred to the master server. The chain overlay follows the > referral. It connects with the saslmech EXTERNAL to the master. The master maps > the DN of the certificate to the replica admin. The replica admin has its > authzTo attribute set to the write admin. This way the writing perfectly worked > on our replica servers for all admins that are listed in the authzTo attribute. > Shortly the machines were updated to SL 6.6 with openldap 2.4.39-8.el6.x86_64. > The proxyauth stopped working. Write requests to the replica servers end with > the error > "ldap_modify: Other (e.g., implementationpepecific) error (80)". Without debug output from slapd there's no evidence of an OpenLDAP software bug here. Most likely the TLS library changed between your two versions and you're missing a TLS option now. Regardless, you're using a Red Hat build which contains their own unknown patches to the code. The OpenLDAP Project cannot support these builds since we don't know exactly what they are, but they are known to break OpenLDAP functionality on a routine basis. e.g. https://bugzilla.redhat.com/show_bug.cgi?id=1095976 Ask Red Hat for support on their build. Closing this ITS. -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/

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(ITS#7993) proxyauth with saslmech EXTERNAL not working
by dkastens＠uos.de 05 Dec '14

05 Dec '14

Full_Name: Dirk Kastens Version: 2.4.39 OS: RedHat SL 6.6 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (2001:638:508:3d0:12a:32c6:740c:8971) We installed an ldap cluster with a mirrored master and several replicas on RedHat SL 6.5 with openldap 2.4.23-34.el6_5.1.x86_64. Write requests to the replicas are referred to the master server. The chain overlay follows the referral. It connects with the saslmech EXTERNAL to the master. The master maps the DN of the certificate to the replica admin. The replica admin has its authzTo attribute set to the write admin. This way the writing perfectly worked on our replica servers for all admins that are listed in the authzTo attribute. Shortly the machines were updated to SL 6.6 with openldap 2.4.39-8.el6.x86_64. The proxyauth stopped working. Write requests to the replica servers end with the error "ldap_modify: Other (e.g., implementationpepecific) error (80)". I installed another replica under SL 7.0 with openldap-2.4.39-3.el7.x86_64: same result. When I configure the idassertbind attribute to use simple bind with a binddn and credentials, the proxyauth works. This is the chain configuration that doesn't work any longer: olcDbURI: "ldap://ldap-master" olcDbStartTLS: none starttls=no olcDbIDAssertAuthzFrom: {0}* olcDbIDAssertBind: mode=self bindmethod=sasl saslmech=EXTERNAL starttls=yes tls_cert="/etc/openldap/certs/ldap-replica.pem" tls_key="/etc/openldap/certs/ldap-replica.key" tls_cacert="/etc/openldap/cacerts/cacerts.pem" tls_cacertdir="/etc/openldap/cacerts" tls_reqcert=demand This is the configuration that works now: olcDbStartTLS: none starttls=no olcDbURI: "ldap://ldap-master" olcDbIDAssertAuthzFrom: {0}* olcDbIDAssertBind: mode=self bindmethod=simple binddn="cn=proxyuser" credentials="secret" starttls=yes tls_cert="/etc/openldap/certs/ldap-replica.pem" tls_key="/etc/openldap/certs/ldap-replica.key" tls_cacert="/etc/openldap/cacerts/cacerts.pem" tls_cacertdir="/etc/openldap/cacerts" tls_reqcert=demand I looked through the manual pages, but I didn't find a difference between 2.4.23 and 2.4.39. In 2.4.23 we had to load the chain module and now we load the back_ldap module. But that's all. Dirk

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(ITS#7992) lmdb: Windows: assume file paths are UTF-8, encode to UTF-16 for WinAPI and enable compiling when UNICODE is defined
by oskari.timperi＠iki.fi 05 Dec '14

05 Dec '14

Full_Name: Oskari Timperi Version: OS: Windows 7 URL: ftp://ftp.openldap.org/incoming/oskari-timperi-141205.zip Submission from: (NULL) (109.204.204.106) The patches make some changes so that compiling lmdb when UNICODE is defined is possible. This is achieved by using the A-versions of WinApi functions where they are needed. Also use CreateFileW to open files so that one can use exotic characters in paths. The library interface is not modified, but the code makes an assumption that paths passed to lmdb functions are encoded as UTF-8. The UTF-8 encoded paths are encoded to UTF-16 which is then passed to CreateFileW.

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Re: (ITS#7974) LDBM's "laggard reader" flaw still present, in continue of ITS#7904
by h.b.furuseth＠usit.uio.no 04 Dec '14

04 Dec '14

On 12/04/2014 11:31 AM, leo(a)yuriev.ru wrote: > Could you suggest something other instead of "oomkiller"? Don't have a particularly good idea. oom_func, maybe. >> This feature could make it interesting to let readers and writers >> tell each other things: Reserve some unused space in the reader >> table slots for stuff the reader's caller could put there, and >> some space for an impatient writer to leave a note. Could go >> in an independent commit if there is any demand for it though. > > Communications between readers and writers may be interesting, but I > think it is over-engineering in the LMDB context. Yes... I guess I was thinking mostly of the prototype, in case we want to add something like it later. Might be useful to add a void* argument which would be NULL now but could be used later, if needed. -- Hallvard

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Re: (ITS#7974) LDBM's "laggard reader" flaw still present, in continue of ITS#7904
by leo＠yuriev.ru 04 Dec '14

04 Dec '14

Hallvard, thank for your comments. 2014-12-02 14:20 GMT+03:00 Hallvard Breien Furuseth <h.b.furuseth(a)usit.uio.no>: > On 10/23/2014 07:13 AM, leo(a)yuriev.ru wrote: >> >> Subject: [PATCH 1/2] lmdb: ITS#7974 oomkiller feature. >> (...) >> +typedef int (MDB_oomkiller_func)(MDB_env *env, int pid, void* thread_id, >> size_t txn); > > > Some thoughts about this: > > Instead of trusting the return value, it seems safer to re-check > with mdb_reader_pid(). Like mdb_reader_check0() does. Maybe > except on Windows, where file locks from dead processes may > linger for a while until the OS reclaims them. I agree that usign mdb_reader_pid() is a better way. > Don't call it OOMkiller just because that's how you use it. > Others might do something else, like sending a reader a signal > which it interprets as "please wake up and finish your txn". > Or it might decide this process is the one which should give up. Could you suggest something other instead of "oomkiller"? Be noted, the "dreamcatcher" feature has a critical bug, which I has found and made fix while work on ITS#7968 & ITS#7987. Currently we hard testing a new code. So, in a week I plan to update both of the patches. > This feature could make it interesting to let readers and writers > tell each other things: Reserve some unused space in the reader > table slots for stuff the reader's caller could put there, and > some space for an impatient writer to leave a note. Could go > in an independent commit if there is any demand for it though. Communications between readers and writers may be interesting, but I think it is over-engineering in the LMDB context. IMHO the LMDB's code has a lot of technical debt, so it is more usefull to re-implement all of from a scratch, under a rules of perfectly-clean codestyle. May be I will do this, but on a basis and after a release of 1Hippeus - it is a extreme performance engine for zero-copy mesaging in a shared memory, partially like Intel DPDK. Leonid.

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(ITS#7991) problem trying to call ldap_set_option
by shupilov＠tut.by 03 Dec '14

03 Dec '14

Full_Name: Dmitry Shupilov Version: 2.4.39 OS: RHEL 6.5 x86_64 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (86.57.254.70) Hello all! It's my first time to post here, so sorry if I will do something wrong :) I have to write shared library which task is to check if the user is correct LDAP user. First of all I prepare env and call ldap_initialize - nothing special here. The ldap_create function sets ld properly (e.g. ld = '0x7fffe40837d0') and in gdb I can read it by (p *ld) or even deeper (p *ld.ldc). But the next function cannot do its job - ldap_set_option failed with "-1" status. I tried to create separate binary which use my shared *.so to do the same job - check a user in LDAP and it works fine: ldap_create assigns "short" address (e.g. 0x602a30). In this case ldap_set_option do what it needs to do. My question is: is the problem of ldap_set_option in that "very long value of address" or is something else? How can I catch the reason of this problem and solve it? BR, Dmitry

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(ITS#7990) (docs) Admin guide: bad link in password policy overlay section
by frederic.poisson＠admin.gmessaging.net 02 Dec '14

02 Dec '14

Full_Name: Frederic POISSON Version: 2.4.40 OS: Linux URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (194.51.12.20) Hello, I'm looking to Password Policy overlay and admin guide 2.4, and i see that Howard CHU has corrected a link (ITS#6264) about "Password Management Issues". But on that link on Symas blog i do not see anything on that subject ? I have also another question about Password policy draft. Does OpenLDAP project already receive a feature request to support the draft in release 10 ? Thanks, Regards,

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