From 719b1e6fae33be7cf88a57864ca7a17ca96a7dc1 Mon Sep 17 00:00:00 2001 From: Akash B Date: Mon, 25 Sep 2023 07:05:19 -0700 Subject: [PATCH] Fix ENOSPC for extended quota When unlinking multiple files from a pool at 100% capacity, it was possible for ENOSPC to be returned after the first few unlinks. This issue was fixed previously by PR #13172 but then this was again introduced by PR #13839. This is resolved using the existing mechanism of returning ERESTART when over quota as long as we know enough space will shortly be available after processing the pending deferred frees. Also, updated the existing testcase which reliably reproduced the issue without this patch. Reviewed-by: Dipak Ghosh Signed-off-by: Akash B --- module/zfs/dsl_dir.c | 22 +++++++------------ .../tests/functional/no_space/enospc_rm.ksh | 12 +++++++++- 2 files changed, 19 insertions(+), 15 deletions(-) diff --git a/module/zfs/dsl_dir.c b/module/zfs/dsl_dir.c index bbe6a03d620f..baf970121a61 100644 --- a/module/zfs/dsl_dir.c +++ b/module/zfs/dsl_dir.c @@ -26,6 +26,7 @@ * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. * Copyright (c) 2016 Actifio, Inc. All rights reserved. * Copyright (c) 2018, loli10K . All rights reserved. + * Copyright (c) 2023 Hewlett Packard Enterprise Development LP. */ #include @@ -1358,30 +1359,23 @@ dsl_dir_tempreserve_impl(dsl_dir_t *dd, uint64_t asize, boolean_t netfree, ext_quota = 0; if (used_on_disk >= quota) { + if (retval == ENOSPC && (used_on_disk - quota) < + dsl_pool_deferred_space(dd->dd_pool)) { + retval = SET_ERROR(ERESTART); + } /* Quota exceeded */ mutex_exit(&dd->dd_lock); DMU_TX_STAT_BUMP(dmu_tx_quota); return (retval); } else if (used_on_disk + est_inflight >= quota + ext_quota) { - if (est_inflight > 0 || used_on_disk < quota) { - retval = SET_ERROR(ERESTART); - } else { - ASSERT3U(used_on_disk, >=, quota); - - if (retval == ENOSPC && (used_on_disk - quota) < - dsl_pool_deferred_space(dd->dd_pool)) { - retval = SET_ERROR(ERESTART); - } - } - dprintf_dd(dd, "failing: used=%lluK inflight = %lluK " - "quota=%lluK tr=%lluK err=%d\n", + "quota=%lluK tr=%lluK\n", (u_longlong_t)used_on_disk>>10, (u_longlong_t)est_inflight>>10, - (u_longlong_t)quota>>10, (u_longlong_t)asize>>10, retval); + (u_longlong_t)quota>>10, (u_longlong_t)asize>>10); mutex_exit(&dd->dd_lock); DMU_TX_STAT_BUMP(dmu_tx_quota); - return (retval); + return (SET_ERROR(ERESTART)); } /* We need to up our estimated delta before dropping dd_lock */ diff --git a/tests/zfs-tests/tests/functional/no_space/enospc_rm.ksh b/tests/zfs-tests/tests/functional/no_space/enospc_rm.ksh index d0f4ff4a08fe..d9582fbe2a76 100755 --- a/tests/zfs-tests/tests/functional/no_space/enospc_rm.ksh +++ b/tests/zfs-tests/tests/functional/no_space/enospc_rm.ksh @@ -17,6 +17,7 @@ # # Copyright (c) 2014, 2016 by Delphix. All rights reserved. # Copyright (c) 2022 by Lawrence Livermore National Security, LLC. +# Copyright (c) 2023 Hewlett Packard Enterprise Development LP. # . $STF_SUITE/include/libtest.shlib @@ -51,11 +52,20 @@ log_must zfs create $TESTPOOL/$TESTFS log_must zfs set mountpoint=$TESTDIR $TESTPOOL/$TESTFS log_must zfs set compression=off $TESTPOOL/$TESTFS -log_note "Writing files until ENOSPC." +log_note "Writing Big(1G) files until ENOSPC." log_mustnot_expect "No space left on device" fio --name=test \ --fallocate=none --rw=write --bs=1M --size=1G --numjobs=4 \ --sync=1 --directory=$TESTDIR/ --group_reporting +log_must rm $TESTDIR/test.* +log_must test -z "$(ls -A $TESTDIR)" +sync_pool $TESTPOOL true + +log_note "Writing small(10M) files until ENOSPC." +log_mustnot_expect "No space left on device" fio --name=test \ + --fallocate=none --rw=write --bs=1M --size=10M --numjobs=200 \ + --sync=1 --directory=$TESTDIR/ --group_reporting + log_must rm $TESTDIR/test.* log_must test -z "$(ls -A $TESTDIR)"