Kernel oplocks. 11 and say thank you for your hard work.

Kernel oplocks Previous message: Is kernel oplocks = yes a good default? Next message: Is kernel oplocks = yes a good default? Messages sorted by: On 04/11/2012 08:44 PM, J. This allows complete data consistency between SMB/CIFS, NFS and local file access. Commented Jun kernel oplocks = no nt acl support = no strict locking = no. (This [global] kernel oplocks = yes. 0-305. com. plugins :: omvextrasorg 7. y-ckt 56/86] disabling oplocks/leases via module parm enable_oplocks broken for SMB3 The intent of this module is to provide the most advanced network file system function for SMB3 compliant servers, including advanced security features, excellent parallelized high performance i/o, better POSIX compliance, secure per-user session establishment, encryption, high performance safe distributed caching (leases/oplocks), optional Do not disable echoes and oplocks on session setup (we only need one credit for tree connection anyway) as a resonse with only 1 credit on phase 1 of sessionsetup is expected. Currently, Samba cannot support level 2 oplocks along with kernel oplocks and automatically disables level 2 oplocks when kernel oplocks are in use. 04 with XBMC (the XBMC-XvBA variant to be precise). Default: kernel oplocks = yes > </quote> > > Defaults to yes, but we (FreeBSD) don't have this feature (yet). 4 kernel, but beware, as there are problems reported with [Samba] strict locking and kernel oplocks in the smb. Previous message: Issues with Linux kernel oplocks Next message: Issues with Linux kernel oplocks Messages sorted by: On Tue, Jul 23, 2013 at 05:01:15PM -0400 [prev in list] [next in list] [prev in thread] [next in thread] List: freebsd-stable Subject: Re: FW: Autorespond Message - re: Re: kernel oplocks From: Kris Kennaway <kris obsecurity ! org> Date: 2001-09-12 23:48:14 [Download RAW message or body] Talking to Digging into that, I discovered that this due to "kernel oplocks" set to yes by default and on the two platforms that have kernel oplock support code for (Linux and IRIX), level 2 oplocks are not supported by the kernel. If I set "strict locking = no", I'm [Samba] oplocks, kernel oplocks, kernel share modes, . 12. version of Windows, so you will have to follow instructions from either point 2 or point 3 below: Click Some Unix systems have been enhanced to understand the Windows oplocks maintained by Samba. com>, Kamal Mostafa <kamal@canonical. Previous message: Issues with Linux kernel oplocks Next message: Issues with Linux kernel oplocks Messages sorted by: On Tue, Jul 23, 2013 at 01:25:52PM -0700 kernel oplocks = Yes lock spin count = 3 lock spin time = 10 oplock break wait time = 0 lock directory = /var/cache/samba block size = 1024 veto oplock files = blocking locks = Yes fake oplocks = No locking = Yes oplocks = Yes level2 oplocks = Yes oplock contention limit = 2 posix locking = Yes strict locking = Yes *** END *** raw NTLMv2 auth = No read raw = Yes realm = registry shares = No reject md5 clients = No reject md5 servers = No remote announce = remote browse sync = rename user script = require strong key = Yes reset on zero vc = No restrict anonymous = 0 rndc command = /usr/sbin/rndc root directory = rpc big endian = No rpc server dynamic port range = 49152 Previous message: Issues with Linux kernel oplocks Next message: Issues with Linux kernel oplocks Messages sorted by: Permissions to open a file and set a LEASE on that file do not imply that the real or effective UID of all such processes must be the same (so they can send each other signals). 4. I installed Samba2. > You could try asking the person who wrote that bit of the code, a certain Jeremy Allison ;-) Rowland I'm sure it is correct, and my log file shows: "smbd/oplock_linux. c:linux _init_kern el_oplocks (287) Failed to setup RT_SIGNAL_LEASE handler" anybody with any ideas what this means? Cheers Mike ASKER CERTIFIED SOLUTION kernel oplocks = no nt acl support = no strict locking = no. 6b) somewhere, as disabling this module removed the violation On 04/11/2012 07:37 PM, Jeremy Allison wrote: >> I have worked on a patchset that converts the parameter into a share >> option that will allow for more fine-grained configuration. Improve this answer. Currently, the only systems that currently support kernel oplocks are IRIX and Linux 2. Obviously the Samba is a great resource, on the Samba Wiki the Configure Samba to Work Better with Mac OS X was invaluable for setting up the /etc/samba/smb. 19. Obviously the man page of smb. 2. > > I also compiled Samba 2. When I run the just compiled samba and dump the configuration with testparm kernel oplocks are nevertheless set to "yes". A system without kernel oplocks will allow the Unix process to update the file, but Download the kernel (e. For more information, see [MS-FSA], Server Acknowledges an OpLock Break. --Best regards, Pavel Shilovsky. oplocks test pass when using kernel oplocks = no >> for just the share to be tested. 6 and later). ar> To: buildroot@busybox. Twice is coincidence. Next a regular user space application running on the Samba system is trying to access the same file too. It only works with > linux-2. 5 now. gi4mpy Posts: 7 Joined: 2017-12-22 10:24. Joined Sep 9, 2016 Messages 8. This option is available only when SMB3 is enabled and kernel-mode SMB daemon is disabled. > I just went through this over the last couple weeks. You signed out in another tab or window. I'm running a fedora core 4. Post by Jeremy Allison Hope this helps. But i can't find how to know if my kernel support it. First Last Prev Next No search results available Search page Enter new bug. 9 see the comment of ryecoaaron who mentioned a kernel oplock problem. conf Next message: [Samba] strict locking and kernel oplocks in Linux kernel oplocks don't know the concept of directory caching. depends on leases exact algorithms; object store semantics; smbX break semantics which operations trigger lease breaks. any idea? @ Kernel oplocks is an smb. (OneFS is the only platform that has > support for them). * BUG 12565: vfs_fruit: Resource fork open request with flags=O_CREAT|O_RDONLY. Protocol driver. 6. Post by gi4mpy » 2017-12-26 11:49. I think it is only SGI and Linux. Build instructions; Installation instructions; Recommendations To: Jeremy Allison <jra@xxxxxxxxx>; Subject: Re: oplocks, kernel oplocks, kernel share modes, . Do i have to configure somthing in the Kernel to suppotr this > feature, or is it supported automatically????> > Thanks, Andre it is supported automatically on a 2. Karol Kasprzak Karol Kasprzak. x. 0 external drive as a single user. Samba problems with kernel oplocks option set to "no" Last modified: 2011-02-09 14:25:53 CST. org Tue Jul 23 14:44:59 MDT 2013. com/?p=350&preview=true That is the only place where we treat kernel oplocks as a global > option. smbd throw off errors for parameters set in /etc/samba/tm_config. This works only on operating systems that support kernel-based oplocks, such as Linux 2. Samba is now developed by the Samba Team as an Open On Fri, Apr 01, 2011 at 08:58:57AM +0100, Bob Cregan wrote: > Hi > Can anyone advise me on "kernel oplocks" in a ctdb cluster. fstat | grep smb: Where can I see the load resulting from these calls?I checked the output but can't Hi, Guys, I think there still are some problems with OPLOCK. > > When I run the just compiled samba and dump the configuration with > testparm kernel oplocks are nevertheless set to "yes". Next message: [Samba] strict locking and kernel oplocks in the smb. /usr/src/linux-2. 37. conf to reproduce the difference between Samba and Windows servers. org kernel of 2. conf file, and the vfs fruit man page contains documentation for all the options. - how it all works?; From: Michael Tokarev via samba <samba@xxxxxxxxxxxxxxx>; Date: Wed, 25 Jan 2023 00:00:09 +0300; Cc: samba@xxxxxxxxxxxxxxx; In-reply-to: <Y9A+Mc+cmcESgOWz@jeremy-acer>; Reply-to: CIFS¶. maxfilesperproc = 32684 sysctl kern. Once the user restarts, he still cannot open the kernel oplocks: we shouldn't cut off our users from the performance benefits of level II oplocks on one of our major platforms by default. Kernel oplocks are enabled on a per-server basis in the smb. 02 or later) but kernel version 4. Introduction; Usage. Click to expand Yes, particularly as most systems connected to these shares are Mac OS ( 10. Top. A file is opened whose owner UID is not the same as the Samba process which opens it 3. 18. Reload to refresh your session. conf is wrong. org> * BUG 7537: streams_xattr and kernel oplocks results in NT_STATUS_NETWORK_BUSY. Or disabling kernel oplocks completely, of course, but if you have those enabled is probably for a good reason :) While testing I have found another Samba bug when assigning permissions to guest user, causing AO486 to start and shows the BIOS information but then fails to adquire a lock on the vhd file. 3 and higher. Looks like we have a problem here. The Linux kernel user’s and administrator’s guide; Kernel Build System; The Linux kernel firmware guide; Open Firmware and Devicetree; The Linux kernel user-space API guide; Working with the kernel development community; Development tools for the kernel; How to write kernel documentation; Kernel Hacking Guides; Linux Tracing Technologies Some quick searching indicated that oplocks might be an issue, but disabling those made no difference. kernel Download the kernel (e. [global] kernel oplocks = yes The default is "no". Pavel Shilovsky 2011-01-30 12:40:10 UTC. org Sat Oct 1 19:57:00 MDT 2011. ro> > To: "Andre Klocke" This suggests disabling kernel oplocks too. So if an From: Kamal Mostafa <kamal@canonical. 15 | compose 7. 2 systems running kernel 2. From: Gustavo Zacarias <gustavo@zacarias. Is the CGI a Linux Native program? Of course it is. conf file I use: kernel oplocks = yes locking = Yes oplocks = Yes level2 oplocks = Yes oplock contention limit = 2 posix locking = Yes strict locking = No This is a Redhat 7. Once is happenstance. kernel Subject: Re: [Samba] strict locking and kernel oplocks in the smb. >> It makes the raw. Client and filter driver at client side will not aware oplock; CAUTION: Make sure to set "kernel oplocks = no" in smb. 11 and say thank you for your hard work. kernel. See also oplocks and level2 oplocks. conf. kernel oplocks = yes It allows data consistency between SMB and the local processes. For this, the package cifs-tools is needed, which can be installed with The minimum version for use of the Linux kernel SMB3 support is kernel version 3. * BUG 12615: manpages/vfs_fruit: Document global options. 11 proxmox kernel. You switched accounts on another tab or window. Supported by mount option cache=strict, or disabling oplocks - but no Linux mechanism oplocks = no level2 oplocks = no Share. kernel oplocks options should be disabled and level2 oplocks should be enabled in smb. cifs mount options: noperm,direct,forcemand,rw,iocharset=utf8. If you want any combination of share properties other than the default, then you must specify the -share-properties parameter with the list of share properties to use for that CIFS¶. Refuse LM &NTLM If you want the share to have only the default share properties, which are oplocks, browsable, and changenotify enabled, you do not have to specify the -share-properties parameter when creating an SMB share. Next a > regular user space application running on the Samba system is trying > to access the same file too. h this line is generated: > > #undef HAVE_KERNEL_OPLOCKS > > So I assume that my Linux box does not support kernel oplocks. Commit "s3/smbd: fix deferred open with streams and kernel oplocks" contains the actual fix, the rest is mainly restructuring and drive-by fixes. The server MUST also request that the underlying file system notify the server when the granted OpLock is broken. Fixes the "CIFS VFS: disabling echoes and oplocks" message logged to dmesg. When a Windows client opens a file that has been configured for veto oplocks, the client will not be granted the oplock I have installed the Mellanox drivers (5. I read that it is not a good idea to have Oplocks ON if you are accessing the Share’s files with Plus I *know* this one can't trigger oplock breaks in the kernel ;) > Since this seems to be Linux > specific (kernel oplocks) that might have avoided the need for a pipe, > although I will have to check the kernel code to see of an open with > O_PATH will trigger a kernel oplock break. 5 | scripts 7. [Philip Ong] Thanks, yes, it does. Two results I got: 1. For more information, see FSCTL_REQUEST_OPLOCK. And to each share definition where I want users capable of opening and saving Office files I added the following - unsure if some of the above overlap with these below: Code: I wouldn't mind knowing where the source is. net Subject: [Buildroot] [PATCH 3/4] samba: convert to choice package Date: Fri, 7 Feb 2014 17:52:33 -0300 [thread overview] Message-ID: <1391806354-32698-4-git-send-email-gustavo@zacarias. I've also added two basic tests for kernel oplocks with some magic so they're only run if Issues with Linux kernel oplocks Jeremy Allison jra at samba. Feb 27, 2019 #12 and oplocks = No too, as, if I understand well, these are supported only by Windows systems. 3. You may need to disable oplocks under the By default, level2 oplocks is set to yes , and you probably won't need to change it. If you have a system that understands oplocks, set kernel oplocks = yes in the Samba configuration file. analyze exact algorithms. from https://www. msk. 2? > (Question to all others!!!) > > Well, I hope everything will work all right, because we would get trouble > in the other way. > > > > One thing I'm stuck with now is the following: > > > > * smbd (process A) holds an exclusive lease > > > > * someone else (process B) tries to open the file > > > > * smbd (process A) gets a signal > > > > How does o Ralph Boehme <slow@samba. ko module version 2. > Thanks, > > Andre > > > >----- Original Message ----- > From: "Dragos" <dragos. cfg only has min =smb2, so I guess the version is smb3, or whatever the default version used in Windows 11. 0-1 sandworm | 64 bit | 6. 9237514 August 5, 2024, 7:21am 5. /configure --enable-fhs --prefix=/usr --sysconfdir=/etc --localstatedir=/var --with-systemd --systemd-install-services - liburing v0. tried to add this option to smb. Do i have to configure somthing in the Kernel to suppotr > this feature, or is it supported automatically???? It is Issues with Linux kernel oplocks Jeremy Allison jra at samba. - how it all works? Messages sorted by: On Tue, Jul 23, 2013 at 02:06:04PM +0200, Ralph Wuerthner wrote: > Hi, > > we identified an interesting defect with Samba and Linux kernel oplocks: > > Having Samba granted an oplock on a file to a CIFS client. This parameter addresses sharing files between UNIX and Windows with oplocks enabled on the Samba server: the UNIX process can open the You signed in with another tab or window. Giuliano Gavazzi Cadet. Samba tries to get a kernel lease using fcntl(F_SETSIG) then fcntl(F_SETLEASE) on the file for the kernel oplock, which fails kernel oplocks = Yes level2 oplocks = No. 6). tls. Cache Manager. A system without kernel oplocks will allow the Unix process to update the file, but This is the reason for I was considering the option kernel oplocks, allegedly aimed to allow for the co-existence of Linux native programs and Windows programs accessing the same files (on a ext2fs Samba-shared directory). 1), including kmod-mlnx-ofa_kernel, on an Oracle Linux 8 system using the RedHat Compatible Kernel (4. 8) for cifs and IBM CNFS for NFS. Oplocks are used by network redirectors on clients with remote servers, and by client applications on local servers. org Tue Jul 23 15:12:28 MDT 2013. I recently switched from using Netatalk to Samba for file access from MacOS to linux. The docs and the rest of the code allow this as a per share > option. I do not see "oplocks" in smb. The NIC is a "Intel Corporation Ethernet Connection (2) I219-LM On Monday 19 November 2001 11:21 am, Andre Klocke wrote: > Hallo. It is okay for shares where file modifications are only performed via samba, since internally, different smbd processes perform inter-process notifications of leased file changes without the help from the kernel on the server, and this allows samba to work in most efficient way. If using the LXD backend on Linux, we can benefit from a performant file system mount, at the expense Often the issue is caused by enabling one of the following: map archive (uses unix execute bit for owner); map system (uses unix execute bit for group); map hidden (uses unix execute bit for other); inherit permissions causes samba to ignore create mask, etc; there's also inherit acls which should default to no "File Permissions and Attributes on MS-DOS and Unix" in Chapter 8. *Veto oplocks* is a smb. conf Jeremy Allison jra at samba. The point is that the two statements above are contradictory, and if the first is true then the default value Issues with Linux kernel oplocks J. Also, the problem dissapears if I use 'kernel oplocks = no' and 'strict locking = yes'. Enable 'kernel oplocks' In log message, I got 'set_file_lock: got kernel oplock on file ' and 'set_file_oplock: granted oplock on file ', If I only edited that file and saved it on we identified an interesting defect with Samba and Linux kernel oplocks: Having Samba granted an oplock on a file to a CIFS client. Specifying this mount option will allow the In a similar manner, FltFsControlFile and ZwFsControlFile can be used to request Windows 7 oplocks from kernel mode. Re: Samba: how to lock file in use. conf if it helps: [global] passdb backend = smbpasswd workgroup = WORKGROUP security=user server string=NAS Server Hello Recently I have bought myself a pogplug, hung a USB-drive on it and installed Samba on the plug. 11 or later is recommended due to the addition of the SMB3 share encryption security feature. > A quick search revealed nothing. conf which are under the [TimeMachineBackup] upgrading from a kernel. map map to guest = bad user guest account = XXXYOURGUESTACCOUNT # Time Machine settings vfs objects = catia fruit streams_xattr fruit:model = MacSamba fruit:advertise_fullsync = true fruit:metadata = stream fruit:veto_appledouble = no #default is yes, not necessary to specify fruit:posix kernel doesn't support oplocks. 16 of 28. Bruce Fields bfields at fieldses. I can update the patchset to also flip the default if this is Oplocks is stream handle based For file systems that do not support ADS, ex: FAT, file handle = stream handle. Tried restarting samba. 0 | kvm 7. conf if if you use this module because this combination is currently broken. org Tue Jul 23 14:47:30 MDT 2013. Samba is started with kernel oplocks = yes 2. In contrast, because readers can grant their priority If it does support kernel oplocks, are they turned on or off by default, and where? I am interested in this because I am deciding whether to turn Oplocks on or off for my Share that is being accessed locally (NFS + SMB) and remotely (WebDAV, FTP). Oplocks, disabling on Linux servers. Disk. openfiles resulting in a constant range of open files between 3000 and 4500 files during heavy copy. Server side. Filter Driver. 11 and 3. 0final-1 Severity: normal According to the man page they are exclusive: level2 oplocks (S) [snip] Currently, if kernel oplocks are supported then level2 oplocks are not granted (even if this parameter is set to yes). 1 running latest 04. 42. 1a on my SuseLinux7. Kernel oplocks are enabled on a per What can I do to resolve this "oplock break failed" problem? 1. 3 stable release - - configured with: . And to each share definition where I want users capable of opening and saving Office files I added the following - unsure if some of the above overlap with these below: Code: If you have non-samba writers as well, you will probably want to look into kernel oplocks. I was pointing out that having 'kernel oplocks = yes' causes no harm if your kernel doesn't support it. Four times is Official GNOME Policy. I use the veto oplock files option to deal On Fri, Apr 03, 2009 at 12:15:54PM -0700, Steven Danneman wrote: > > > Hi!> > > > Attached find some initial work for supporting level2 kernel oplocks. Breaks the oplock when a local Unix process or NFS operation accesses an oplocked file, thus preventing corruption. It’ll aware oplock. 0. 5 and 5. solves this. The core oplock functionality of the oplock package is implemented in the kernel, primarily through FsRtlXxx routines such as FsRtlInitializeOplock. The Samba-Bugzilla – Bug 7537 streams_xattr and kernel oplocks results in NT_STATUS_NETWORK_BUSY Last modified: 2017-03-27 09:29:59 UTC Versions 2, 2. com Cc: Steve French <steve. 2 | cputemp 7. 7. I have an smbtorture patch that gets RAW-OPLOCK passing against our kernel Kernel Oplocks problem Last modified: 2006-08-09 03:16:25 CST. Full smb. See Bug 7537 for details. x86_64). conf parameter that notifies Samba (if the UNIX kernel has the capability to send a Windows client an oplock break) when a UNIX process is attempting to open the file that is cached. What else do I need to configure to get Dosemu file locks recognized by Samba? Thanks, Stephen-To unsubscribe from this list: send the line "unsubscribe level2 oplocks = no kernel oplocks = yes oplocks = yes But still I am having lots of problems in file locking. ru>; Reply-to: samba@xxxxxxxxxxxxxxx; User-agent: >Hi! > > Attached find some initial work for supporting level2 kernel oplocks. I will up date the man page next week. It would probably > make sense for this to be a share-level parameter, though, since > different shares might have On Monday 19 November 2001 03:09 pm, Andre Klocke wrote: > What kind of propblems are you talking about? Is it fixed in 2. The Samba-Bugzilla – Bug 13121 Non-smbd processes using kernel oplocks can hang smbd. (OneFS is the only platform that has support for them). Commented Jun 28, 2022 at 12:51. [MS-SMB2], "Algorithms for Leasing in an Object Store" Hi! Attached is a patch for bug 7537. ==> SMB-only feature. Looks like there was an interaction with the SAMBA-VSCAN module (version 0. Without kernel oplocks, samba has support for generic user-land oplock support. org) and change directory into the top of the kernel directory tree (e. I tried adding the option anyway, but it unfortunately it didn't have any affect. - how it all works?; From: Rowland Penny via samba <samba@xxxxxxxxxxxxxxx>; Date: Fri, 20 Jan 2023 09:21:01 +0000; Cc: Rowland Penny <rpenny@xxxxxxxxx>; In-reply-to: <1964cc0b-780e-bf8f-10df-2f57bef78762@msgid. That should eliminate conflicts between Unix DESCRIPTION. kernel_ops in make_connection_snum(). When server establishes connection with the 1st share, smbd sets sconn->oplocks. Bruce Fields The Linux Kernel 5. - how it all works? Michael Tokarev mjt at tls. Oplocks allow SMB clients to lock files and locally cache information while preventing other users from modifying a given file. Another bad thing is that kernel oplocks is a global parameter. When the system's oplock package breaks a Level 1, Batch, Filter, Read-Write, Read-Write-Handle, or, under certain circumstances a Read-Handle oplock: Samba can automatically detect kernel oplocks and use them if present. conf file. The regular procedure would be that the kernel sends a signal to the Samba process holding the kernel lease pam password change = yes username map = /etc/samba/users. The opportunistic locking settings can be set in the global section. See [FSBO] section 2. e. Last modified: 2020-12-11 08:25:54 UTC I wouldn't mind knowing where the source is. 60 KB, application/x-gzip) 2006-07-14 11:32 UTC, Daniel Beschorner (dead mail address) no flags: Details: tcpdump no kernel oplocks (484. I have used an AMD E350 Fusion Mini-ITX board to build a HTPC/Fileserver for easy access of media, mostly movies and tv-shows, running Lubuntu 12. Following conditions are not working as expected CIFS(linux) --> CIFS(windows) NFS --> CIFS CIFS --> FTP How ever CIFS(windows) --> CIFS ( windows) locking working as expected. h, but even here kernel oplocks are set to "yes". The same line is generated in acconfig. Hey, I am having a bit of trouble retaining my kerberos authentication to the DC of my Domain. if the share is configured for CIFS/SMB2 only access, not supporting If the UNIX kernel has the ability to send an oplock break, then the kernel oplocks parameter enables Samba to send the oplock break. We observe. But, having correct documentation does matter. 1 & 3. Previous message: Issues with Linux kernel oplocks Next message: Issues with Linux kernel oplocks Messages sorted by: On Tue, Jul 23, 2013 at 02:12:28PM -0700 And in windows 10 secpol. org Tue Jul 23 14:32:16 MDT 2013. Bug#: 7928: Product: Level 10 log with kernel oplocks off (182. Currently the support exists only in SGI Irix 6. 5. 2, Granting OpLocks. conf Messages sorted by: 1) Does "strict locking = no" negate "kernel oplocks = yes" ? 2) What's the difference between the two? 3) What a good way to test if a file got a lock seen from the linux side and the windows side?. conf strict locking = no oplocks = no kernel oplocks = no. send the line "unsubscribe linux-cifs" in the body of a message to majordomo@vger. The regular procedure would be that the > kernel sends a It seems to me that it's a not correct behaviour of this option. # In /etc/smb. Client side. As per kernel oplocks (S) section in documentation: Kernel oplocks support allows Samba oplocks to be broken whenever a local UNIX process or NFS operation accesses a file that smbd(8) has oplocked. > > We want to use the switch "kernel oplocks = yes". > The point is that the two statements above are contradictory, and if > the first is true then the default value for FreeBSD is wrong. AUTHOR. ar> () In-Reply-To: <1391806354-32698-1-git-send-email-gustavo@zacarias. Selecting this option encrypts all Microsoft network communication using the SMB3 protocol. A system without kernel oplocks will allow the Unix process to update the file, but the client programs will notice PREEMPT_RT kernels map rw_semaphore to a separate rt_mutex-based implementation, thus changing the fairness: Because an rw_semaphore writer cannot grant its priority to multiple readers, a preempted low-priority reader will continue holding its lock, thus starving even high-priority writers. ru Fri Jan 20 09:10:49 UTC 2023. At 03:39 PM 12/8/00 -0500, Brian Stephens wrote: >Can someone tell me what vendor modified platforms has the Kernel >Oplocks function >built into the installation?And for what Samba version? > >HP, SUN, AIX, and/or SGI. x release ? Oplocks is stream handle based Local FSD. I was > trying to narrow down a problem with locking. So far so good. xx firmware on network of Macs & Androids only. Then, when samba opens file on a 2nd share, it may call set_file_oplock(oplock=0x4), but linux_set_kernel See section 2. g. Previous message (by thread): [Samba] Problem with windows shares after stopping down one dc Next message (by thread): [Samba] oplocks, kernel oplocks, kernel share modes, . The original Samba software and related utilities were created by Andrew Tridgell. org Thu Apr 12 10:45:11 MDT 2012. At the time of this writing, this feature is supported only by SGI Irix 6. > > Looks very good to me. Keep in mind that for multi-user database stuff you do not want oplocks in use with your database files. meanwhile got notified if access the locally mounted samba share folder. The same line is > > Digging into that, I discovered that this due to "kernel oplocks" > set to yes by default and on the two platforms that have kernel > oplock support code for (Linux and IRIX), level 2 oplocks are not > supported by the kernel. Specifying this mount option will allow the You signed in with another tab or window. You should never > need to touch this parameter. EXAMPLES [share] vfs objects = streams_xattr. 1, my kernel is using 2. 0 The Linux kernel user’s and administrator’s guide Package: samba Version: 3. ar> Convert the Here are new results for the given advices: sysctl kern. Trying to tweak the Samba settings on MyCloud Gen. It won’t aware oplock. In acconfig. 36. org, kernel-team@lists. The rest, AFAIK, NO! >Thanks in advance. conf which are under the [TimeMachineBackup] section, specifically durable handles, kernel oplocks (a > > Kernel oplocks do not support SMB2+ LEASES. [global] kernel oplocks = yes. Previous message: [Samba] strict locking and kernel oplocks in the smb. kerneldrivers. Doesn't matter. I have been using Check out the latest entry on OpLocks and ECPs - http://www. openfiles: I made several calls to kern. configure some test programs regarding kernel oplocks are compiled, #undef HAVE_KERNEL_OPLOCKS So I assume that my Linux box does not support kernel oplocks. org, stable@vger. 2f and later. Bug#: 3912: Product: Component: Status: RESOLVED: Resolution: FIXED Assigned To: Jeremy Hi, Since updating to Samba 4. com> To: linux-kernel@vger. OPLOCKS. SerNet ! DE [Download RAW message or body] On Mon, Aug 28, 2006 at 09:52:59PM +1000, James Peach wrote: > On both Linux and IRIX, oplocks are a feature of the VFS layer, so > they are supported (locally) for all filesystem types. Previous message: Issues with Linux kernel oplocks Next message: Issues with Linux kernel oplocks Messages sorted by: On Tue, Jul 23, 2013 at 04:32:16PM -0400 Next message: Is kernel oplocks = yes a good default? Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] On Thu, Apr 12, 2012 at 06:45:11PM +0200, Christian Ambach wrote: > On 04/11/2012 08:44 PM, J. It works for a bit until (what i suspect to be) the keytab file being updated and losing its authorization with the Domain. For more information, see , Server Requests an OpLock. Avoid changing. I can create files in the mounted cloud storage bucket as long as I'm connected to the server I set up a SMB/CIFS share on my FreeNAS box (Xeon E3-1220v5, 8GB DDR4 RAM) and I noticed that transfer rates are limited to ~70 MB/s, while I can easily get around 110 MB/s via WebDAV and using iperf I can achieve the complete theoretical maximum of my gigabit connection with ~940 MBit/s. When oplocks are enabled, the client caches all changes to the file until the oplock is broken (by another windows client) or the file is closed. User mode. 05. > > I have a ctdb (GPFS is the parallel file system) setup that uses > samba (3. french@primarydata. However, Linux and FreeBSD support are expected in the near future. In Linux, Windows networking is serviced by the Samba daemon. conf and restart the smbd service, though still no luck. NB: The acl_xattr is optional, if set, you get extended ACL-Support Juer Lee wrote: > If your kernel does not support kernel oplocks (or you do not have them enabled) you cannot use oplocks on a windows client if you will also change the file under linux/nfs. Post by Pavel Shilovsky. 7 on UnixWare 7. 6 - To: samba@xxxxxxxxxxxxxxx; Subject: Re: oplocks, kernel oplocks, kernel share modes, . 591 6 6 silver user can find this param too kernel oplocks = no – Christophe Debove. On 7/23/2013 4:47 PM, Jeremy Allison wrote Hello there, a mildly experienced (know how to use the CLI/Terminal, edit config files and tweak easily accessible things) Linux user here. Follow answered Apr 20, 2012 at 17:55. I know CPU utilization can be a bit high and that's why Ksmbd has gained momentum, until that's built into OpenWrt and easy to configure in LuCI this is the way to go. org Tue Jul 23 15:53:04 MDT 2013. omv 7. Three times is enemy action. 3 we are unable to open any file if "io_uring:sqpoll = yes" is set in smb. Problem 1 - Both testparm and /var/log/samba/log. Previous message: Issues with Linux kernel oplocks Next message: Issues with Linux kernel oplocks Messages sorted by: On Tue, Jul 23, 2013 at 04:32:16PM -0400 kernel oplocks = yes . delcea at farmexim. The intent of this module is to provide the most advanced network file system function for SMB3 compliant servers, including advanced security features, excellent parallelized high performance i/o, better POSIX compliance, secure per-user session establishment, encryption, high performance safe distributed caching (leases/oplocks), optional Proper Locking Under a Preemptible Kernel: Keeping Kernel Code Preempt-Safe; Lightweight PI-futexes; Futex Requeue PI; Hardware Spinlock Framework; Percpu rw semaphores; A description of what robust futexes are; The robust futex ABI ©The kernel development community. Server FSD. Our setup: - Debian 10 (Buster) with Linux 5. This VFS module is part of the samba (7) suite. Just wanted to report on Samba 4. > > See also the oplocks and level2 oplocks parameters. maxfiles = 200000 sysctl kern. 3, Breaking OpLocks. When oplocks and kernel oplocks are both enabled, you should get Lock File (Oplocks) Opportunistic lock (Oplocks) is a Windows file locking mechanism that facilitates caching and access control to improve performance. 93 KB, application/x-gzip) 2006-07-24 11:19 UTC, Daniel Beschorner (dead mail address) no flags [test_smb_mount] comment = smb mount test path = /my_path/ read only = no browsable = yes kernel oplocks = yes virtio-fs mounts. 4 from backports running on VMWare ESXi - Samba 4. Samba is configured in one file: /etc/smb. Samba can automatically detect kernel oplocks and use them if present. 6 and all seems to point to either kernel or samba mix (3. el8. Here is the /etc/samba/smb. 2 | mergerfs 7. Build instructions; Installation instructions; Recommendations Issues with Linux kernel oplocks J. > >Brian Stephens > > > Regards ----- Richard Sharpe, sharpe at The Samba-Bugzilla – Bug 12791 kernel oplocks still have issues with named streams Last modified: 2017-08-15 08:27:07 UTC On Mon, 19 Nov 2001, Andre Klocke wrote: > Hallo. I've tried on Centos 4. The module should be stacked with vfs_catia if enabling character conversion and must be stacked with vfs_streams_xattr, see the example section for the correct config. 4 and Irix. 2. There are 7 options > (since level2 oplocks requires Why the oplocks are refused is unknown, but for now I don't need them ; - there is only one application (a CAO drawing tool) for which only some files causes a violation error, even with kernel oplocks = No. Restarting the Windows instances. conf parameter that identifies specific files for which Oplocks are disabled. If i compile the kernel manually, which option should i enable ?(i can't find a oplocks option) Eric--To unsubscribe from this list go to the following URL and read the [myshare] path = /mnt/bucket/data valid users = %U writable = yes durable handles = yes kernel oplocks = no kernel share modes = no posix locking = no ea support = yes browseable = yes read only = No inherit acls = yes Now, everything seems to work. Reading the > documentation on kernel oplocks it seems to me that I can export the > same area via samba and NFS with "kernel On Sat, 15 Sep 2001, ian j hart wrote: > => This parameter defaults to on on systems that have the > support, and off on systems that don't. 73) for cases for example such as when the server does not support oplocks and the user is sure that the only updates to the file will be from this client. Once the host operating system is sharing the folder, we need to mount it on the instance. I was going to try disabling oplocks on the client side, but SMBv2 and SMBv3 no longer support disabling oplocks on the client side, and I'd prefer not to go back to Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. Digging into that, I discovered that this due to "kernel oplocks" set to yes by default and on the two platforms that have kernel oplock support code for (Linux and IRIX), level 2 oplocks are not supported by the kernel. 2f and later; Linux and FreeBSD should soon follow. However, when i try to copy large files (over 4 GB) on it, Samba crashes and I have to reboot my pogoplug to get everything working again. So you're > just seeing old SMB1-style oplocks. 12 (or backport of cifs. I'm having a problem with being able to copy a local Windows file to NFS area shared by samba on WinXP. Do you want to include in a 3. User. Network. > > Another bad thing is that kernel oplocks is a global Issues with Linux kernel oplocks Jeremy Allison jra at samba. I checked through all the logs in the /var/log/samba directory and I didn't see any oplock timeouts, only a few init_oplocks. Permalink. Out of curiosity, are you working on making level2 kernel oplocks work using samba on linux? Have there been any recent improvements in the linux API that will make this easier? It would definitely be cool to get RAW-OPLOCK passing against kernel oplocks on linux. >> Please have a look at it. Kernel Oplocks are essentially a method that allows the Linux kernel to co-exist with Samba's oplocked files, although this has provided better integration of MS Windows network file Note that durable handles are only enabled if kernel oplocks = no, kernel share modes = no, and posix locking = no, i. It's running great on my WRT32X on kernel 5. Is kernel oplocks = yes a good default? Christian Ambach ambi at samba. Bruce Fields wrote: > > >That said, ideally we'd have kernel support for level 2 oplocks and then > >people wouldn't have to make this I have two shares, one with "kernel oplocks = Yes", and another one with "kernel oplocks = No". Add or replace these settings if they does not exists (these are the wanted settings): [global] kernel oplocks = yes [mydatashare] Contribute to SpectraLogic/samba development by creating an account on GitHub. cfg, and I have not manually change that setting, so it probably is the default value for that. 11. > > One thing I'm stuck with now is the following: > > * smbd (process A) holds an exclusive lease > > * someone else (process B) tries to open the file > > * smbd (process A) gets a signal > > How does smbd find out if process B opened the file for r/w, so that > process A has to drop the lease KSMBD - SMB3 Kernel Server¶ KSMBD is a linux kernel server which implements SMB3 protocol in kernel space for sharing files over network. . Signing if client agrees. @user1686 smb. Yes, this is exactly what I wrote. When trying to mount any cifs share (these are regular CIFS shares, not over a Mellanox connection), I get the error: mount error: cifs filesystem not supported by the system mount error(19): No If the kernel doesn't support the feature, > the resulting code in Samba (to support kernel oplocks) > becomes a no op. To disable Opportunistic Locking: The location of the client registry entry for opportunistic locking varies depending on the. smb2 leases are disabled. The vfs_fruit module provides enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver. [test_smb_mount] comment = smb mount test path = /my_path/ read only = no browsable = yes kernel oplocks = yes Mount a folder shared with SMB on an instance. I also compiled Samba 2. The oplock breaks even if it is the same process or thread performing the Also: how can I test if my kernel does support oplocks? I am looking for answers where I learn how oplocks work and how they are implemented/handled in linux, rathern than Problem 1 - Both testparm and /var/log/samba/log. I know, I looked at the code. I tried to disable/enable 'kernel oplocks' here. documents: see e. 4-1. * BUG 11961: winbindd: idmap_autorid allocates ids for unknown SIDs from other backends. com> Subject: [PATCH 3. Specify kernel oplocks = yes to enable this feature. Are "kernel oplocks" enabled on the Samba side? – grawity. Linux kernel version: v2. Kernel mode. File systems call into this package to implement the oplock functionality in [global] security = USER guest account = nobody public = yes guest ok = yes map to guest = bad user map hidden = No map system = No kernel oplocks = no oplocks = no level2 oplocks = no [downloads] path = /mnt/disk/downloads read only = No don't believe kernel oplocks are on be default but they aren't needed unless you're sharing a file that the linux system also writes to. KSMBD architecture¶ The subset of performance related operations belong in kernelspace and the other subset which belong to operations which are not really related with performance in userspace. G. msc i selected: Send NTLMv2 response only. Getting 80-110 MB/s off my USB 3. ubuntu. This is not the question though, the question is why kernel oplocks don't work when they should, or if it The Samba-Bugzilla – Bug 12783 If "kernel oplocks" == yes, smbd tries to release not taken oplock when closing file Last modified: 2023-01-25 17:51:44 UTC Do not disable echoes and oplocks on session setup (we only need one credit for tree connection anyway) as a resonse with only 1 credit on phase 1 of sessionsetup is expected. bgyuu bpih nitzc nmeoqw rwch ibbr jpsvqm wwm obgw sxlic