https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-10028 Lustre <p>Some users need the information about Lustre mount. But the information exported by <em>/proc/mounts</em> is not enough especially for some Lustre special mount options and flags such as abort_recov, noir, etc.</p> <p>This patch can export some Lustre special mount information. i.e.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">[root@QYJ tests]# cat /sys/kernel/debug/lustre/mounts profile: lustre-MDT0000 device: /dev/loop0 flags: 3200 options: user_xattr,errors=remount-ro profile: lustre-OST0000 device: /dev/loop1 flags: 3000 options: ,errors=remount-ro profile: lustre-OST0001 device: /dev/loop2 flags: 3000 options: ,errors=remount-ro profile: lustre-client device: 192.168.59.129@tcp:/lustre flags: 2 options: user_xattr,flock </pre> </div></div> LU-10028

Export the information about Lustre special mount flags and options

New Feature Minor Resolved Fixed Qian Yingjin Qian Yingjin patch Mon, 25 Sep 2017 07:04:11 +0000 Thu, 12 Apr 2018 16:36:20 +0000 Wed, 22 Nov 2017 14:56:37 +0000 Lustre 2.11.0 0 4 <p>Yingjin Qian (qian@ddn.com) uploaded a new patch: <a href="https://review.whamcloud.com/29187" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/29187</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10028" title="Export the information about Lustre special mount flags and options" class="issue-link" data-issue-key="LU-10028"><del>LU-10028</del></a> obdclass: Export Lustre special mount infomation<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: f03191a4f47a355043c47308632a448794e295f1</p> <p>It would be better to export this information from /proc/mounts directly rather than adding a special <tt>/sys/kernel/debug/lustre/mounts</tt> file, so that "<tt>mount</tt>" returns the right information?</p> <p>The patch <a href="https://review.whamcloud.com/20161" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/20161</a> is a step in the right direction for this. Creating a proper linkage between the superblock of the mountpoint and the superblock of the underlying filesystem, even if only for ldiskfs, would help with <a href="https://jira.whamcloud.com/browse/LU-137" title="ioctl passthrough mechanism for Lustre OST/MDT mountpoints" class="issue-link" data-issue-key="LU-137"><del>LU-137</del></a> to be able to pass superblock ioctls down to the underlying filesystems for e.g. <tt>resize2fs</tt> and similar.</p> <p>Hi Andreas,<br/> I tried to export the information frome /proc/mounts directly, but I could not find a better solution except patching the kernel proc system.</p> <p>The submitted patch <a href="https://review.whamcloud.com/29187" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/29187</a> can be used not only for server mountpoint information, but also for exporting client side mountpoint information (i.e. abort_recov).</p> <p>Thanks,<br/> Qian</p> <p>Sorry, I just found that super_block has 'show_options', which can export Lustre special options via /proc/mounts. I will make a patch sooner.</p> <p>Yingjin Qian (qian@ddn.com) uploaded a new patch: <a href="https://review.whamcloud.com/29228" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/29228</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10028" title="Export the information about Lustre special mount flags and options" class="issue-link" data-issue-key="LU-10028"><del>LU-10028</del></a> obdclass: Export Lustre mount flags and options<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 3ba3b15304d9f71173b52a667665c2ab60a4dba9</p> <p>The output of '/proc/mounts' for Lustre is:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">[root@QYJ tests]# cat /proc/mounts | grep lustre /dev/sda1 /usr/sbin/mount.lustre xfs rw,relatime,attr2,inode64,noquota 0 0 /dev/loop0 /mnt/lustre-mds1 lustre ro,svname=lustre-MDT0000,mgs,osd=osd-ldiskfs,user_xattr,errors=remount-ro 0 0 /dev/loop1 /mnt/lustre-ost1 lustre ro,svname=lustre-OST0000,mgsnode=192.168.59.129@tcp,osd=osd-ldiskfs,errors=remount-ro 0 0 /dev/loop2 /mnt/lustre-ost2 lustre ro,svname=lustre-OST0001,mgsnode=192.168.59.129@tcp,osd=osd-ldiskfs,errors=remount-ro 0 0 192.168.59.129@tcp:/lustre /mnt/lustre lustre rw,flock,user_xattr,lazystatfs 0 0 </pre> </div></div> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="https://review.whamcloud.com/29228/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/29228/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10028" title="Export the information about Lustre special mount flags and options" class="issue-link" data-issue-key="LU-10028"><del>LU-10028</del></a> obdclass: Export Lustre mount flags and options<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 6ee90b7586d58b0df27a511472e38792baba4745</p> <p>Landed for 2.11</p> Related LU-10087 LU-8066 LU-10677 LU-10887 Development Rank 1|hzzkr3: Rank (Obsolete) 9223372036854775807