Thank you so much. I created a file dns_resolver.conf in /etc/request-key.d with the following content. create dns_resolver * * /usr/sbin/cifs.upcall %k After that I was able to enter the shared folders but I would get "Resource temporarily unavailable" for folders other than the first one I attempted. After adding "actimeo=0" that problem was fixed as well.
Regards, Doug On Jun 13, 2013, at 2:51 PM, Steve French <[email protected]> wrote: > Well - that is good news. Your problem is probably much easier .... > > Have you ever been able to connect to a DFS referral - even with ip > address (with hostname in dfs referral you have to have a dfs upcall > helper to resolve hostnames instead of ip address). > > On Thu, Jun 13, 2013 at 4:47 PM, Doug Clow <[email protected]> wrote: >> Hi Steve, >> >> Thanks for the in depth response. I tried your suggestion with setting >> actimeo=0, but didn't get any change on my end. I may be experiencing a >> different issue as I've never been able to list the contents of or enter a >> shared folder from dfs using any order of commands. I can mount the >> namespace and list the folders within, just not go inside the referrals. >> >> Here's what I'm working with: the system configuration is two Windows 2012 >> machines that host standalone DFS in a failover cluster. The targets of the >> referrals are those same two servers, where each folder has both servers >> assigned as targets. I have disabled SMB2/3 on both and set DFS to use DNS >> based referrals rather than Netbios in order to maximize Linux >> compatibility. It didn't make a difference with default Netbios referrals >> or DNS based. >> >> My mount command is: >> >> mount.cifs //dfs.domain.com/namespace test -o sec=krb5,cruid=0,actimeo=0 >> >> I've also tried using standard ntlm authentication but it doesn't seem to >> make a difference. >> >> Regards, >> Doug >> >> >> On Jun 13, 2013, at 2:14 PM, Steve French <[email protected]> wrote: >> >>> This is a tough issue - if you are doing an ls immediately followed by >>> a cd into the dfs link. We plan to ask Microsoft next week if they >>> have any ideas how to detect the following sequence - ls of directory >>> which contains dfs link (client caches the dfs link for one second >>> thinking it is a directory), client cd into directory. The problem >>> we have is that many variants of "ls" can potentially cause 1000s of >>> stat calls to be sent over the network for one ls (queyrpathinfo or >>> open/query/close) if we don't cache the output of readdir (SMB >>> FindFirst/FindNext), but if we do cache then we can mistake a >>> directory for a dfs link. If that is the problem that you are running >>> into - the obvious solution is to turn off metadata attribute caching >>> (set actimeo=0 on mount). Jeff suggested a patch which would prevent >>> us from caching information on directories which is returned from >>> FindFirst but that could cause a substantial degradation in >>> performance - and we have not researched the alternatives (higher >>> levels of FindFirst and QueryDir that may return hints we can use to >>> decide whether to cache such as different "LinkCount" or EA size or >>> some such). >>> >>> On Thu, Jun 13, 2013 at 4:04 PM, Doug Clow <[email protected]> wrote: >>>> Hello, >>>> >>>> I am in need to mount a DFS share on CentOS 6.4. My kernel is 2.6.32-358. >>>> I am having the trouble where if I mount a DFS root namespace, I cannot >>>> enter or ls the shared folders. If I immediately try to ls the shared >>>> folder, I receive the error, "Object is remote". If I first ls the root >>>> of the namespace and then subsequently ls the shared folder I get the >>>> error, "Invalid argument" or one time "Resource temporarily unavailable". >>>> >>>> I have searched the list archives and I see several mentions of this >>>> issue. Is there a known workaround or a patch at this time? >>>> >>>> Thank you, >>>> Doug Clow >>>> >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe linux-cifs" in >>>> the body of a message to [email protected] >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >>> >>> >>> -- >>> Thanks, >>> >>> Steve >> > > > > -- > Thanks, > > Steve -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
