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-3557 Lustre <p>Currently with a read only mount, open(2) with O_RDONLY|O_CREAT will fail with -EROFS, no matter the file exists or not.<br/> If the file is already there and we don't need to create the file, we should make the open work.<br/> The gcc-fortran runtime tends to add O_CREAT flag when it's trying to open a file, this prevents us from using the fortran based apps.</p> LU-3557

open(2) an existing file with O_RDONLY|O_CREAT fails with -EROFS, ro mounted client

Bug Minor Resolved Fixed Emoly Liu Li Dongyang patch Thu, 4 Jul 2013 04:25:15 +0000 Wed, 4 Sep 2013 17:16:12 +0000 Sat, 17 Aug 2013 14:35:22 +0000 Lustre 2.4.0 Lustre 2.5.0 0 6 <p>patch for master <a href="http://review.whamcloud.com/6893" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/6893</a></p> <p>Emoly,<br/> Could you have a look at this one?<br/> Thank you!</p> <p>FYI, when opening a existed file on readonly ext3 file system, we will get following results.</p> <p>open(existed_file, O_RDWR | O_CREAT) -&gt; -EROFS<br/> open(existed_file, O_CREAT) -&gt; 0<br/> open(existed_file, O_WRONLY | O_CREAT) -&gt; -EROFS<br/> open(existed_file, O_RDONLY | O_CREAT) -&gt; 0</p> <p>Obviously, opening a non-exist file will return EROFS no matter what the flag is.</p> <p>patch landed for 2.5</p> <p>backport patches <a href="http://review.whamcloud.com/#/c/7550/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/7550/</a> for b2_1</p> Development Rank 1|hzvunb: Rank (Obsolete) 8959 Severity