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-14286 Lustre <p>The ldiskfs <tt>osd_fallocate()</tt> does not correctly zero the allocated blocks. This is not noticed during autotest and local developer testing because the underlying storage is zero-filled due to using a sparse backing file and will usually read back as zero. Also, the fsx data correctness test was not properly detecting <tt>fallocate()</tt> support, and as a result this behavior was not detected until after <tt>fsx</tt> was fixed.</p> <p><tt>fsx</tt> uses <tt>test_fallocate()</tt> to determine if <tt>fallocate()</tt> along with its various FLAGS is enabled and could be called. This was discovered while working on <a href="https://jira.whamcloud.com/browse/LU-14160" title="Implement fallocate FALLOCATE_FL_PUNCH_HOLE support" class="issue-link" data-issue-key="LU-14160"><del>LU-14160</del></a> that <tt>test_fallocate()</tt> always returned false as a bug. Resulting is <tt>fallocate()</tt> being skipped always for <tt>fsx</tt> runs.</p> LU-14286

fallocate() does not zero on-disk data

Bug Blocker Resolved Fixed Arshad Hussain Arshad Hussain Fri, 1 Jan 2021 07:50:25 +0000 Sat, 30 Jan 2021 17:39:06 +0000 Wed, 27 Jan 2021 13:05:46 +0000 Lustre 2.14.0 Lustre 2.14.0 0 4 <p>Arshad Hussain (arshad.hussain@aeoncomputing.com) uploaded a new patch: <a href="https://review.whamcloud.com/41119" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41119</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> fsx: 'fsx' calling test_fallocate() always returns false<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 80f2acf55464ebc52f15872223d49481810ffdb0</p> <p>Arshad, I've recharacterized this ticket to be more about the <tt>osd_fallocate()</tt> bug rather than the fsx bug, since it is essentially a data corruption issue that needs to be fixed as part of 2.14.0, and since this patch was already fixing the problem. Rather than spin up a new patch with the same fix, I instead changed the commit message to make it clear the importance of the patch and the reason that it is being included in 2.14.0 at this late date.</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/41119/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41119/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> osd-ldiskfs: fallocate() should zero new blocks<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 72617588ac8cb2e3e5a7b8e5ebc201cab524d938</p> <p>Landed for 2.14</p> <p>Andreas Dilger (adilger@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/41204" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41204</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> osd-ldiskfs: fallocate with unwritten extents<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 44c56a496d80a8607d29681ade498fe4fbf85a59</p> <p>Still not fixed. </p> <p>James Nunez (jnunez@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/41211" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41211</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> tests: reduce fallocate space sanity 150e<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 4be24e98c0d1f1a08c9ca03444a3cb682017303c</p> <p>Andreas Dilger (adilger@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/41211/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41211/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> tests: reduce fallocate space sanity 150e<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: b9274179adf0939909ff2dd78d077515a64fd25f</p> <p>Alex Zhuravlev (bzzz@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/41216" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41216</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> osd: don't read unwritten blocks<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 065e10770fc082ba8ec80aed21a797a34faaaab4</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/41216/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41216/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> osd-ldiskfs: don't read unwritten blocks<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 42c52069cada6837df34a02638717dff709e5a0e</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/41204/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41204/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> osd-ldiskfs: fallocate with unwritten extents<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 4f18e08099e51b682f6acb1cf9fea6d7d45f5fd7</p> <p>Andreas Dilger (adilger@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/41315" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41315</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> osd-ldiskfs: enable fallocate by default<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 0ba7b99f41593cdedcf6b1340b73932edd3fa3e0</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/41315/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41315/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-14286" title="fallocate() does not zero on-disk data" class="issue-link" data-issue-key="LU-14286"><del>LU-14286</del></a> osd-ldiskfs: enable fallocate by default<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 51d2a79ac93d31f969baaa5f10da707762acf3f2</p> <p>Finally I think that everything tracked here has landed</p> Related LU-14326 LU-14333 LU-14324 LUDOC-487 Development Rank 1|i01idz: Rank (Obsolete) 9223372036854775807 Severity