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ZTS: Fix create-o_ashift test case 

The function that fills the uberblock ring buffer on every device label
has been reworked to avoid occasional failures caused by a race
condition that prevents 'zpool sync' from writing some uberblock
sequentially: this happens when the pool sync ioctl dispatch code calls
txg_wait_synced() while we're already waiting for a TXG to sync.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #6924 
Closes #6977
This commit is contained in:
LOLi 2017-12-19 19:49:33 +01:00 committed by Brian Behlendorf
parent bbffb59efc
commit c30e34faa1
2 changed files with 26 additions and 34 deletions
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8
cmd/zdb/zdb.c
View File

@ -2788,10 +2788,6 @@ dump_label(const char *dev)
exit(1);
}
if (ioctl(fd, BLKFLSBUF) != 0)
(void) printf("failed to invalidate cache '%s' : %s\n", path,
strerror(errno));
if (fstat64_blk(fd, &statbuf) != 0) {
(void) printf("failed to stat '%s': %s\n", path,
strerror(errno));
@ -2799,6 +2795,10 @@ dump_label(const char *dev)
exit(1);
}
if (S_ISBLK(statbuf.st_mode) && ioctl(fd, BLKFLSBUF) != 0)
(void) printf("failed to invalidate cache '%s' : %s\n", path,
strerror(errno));
avl_create(&config_tree, cksum_record_compare,
sizeof (cksum_record_t), offsetof(cksum_record_t, link));
avl_create(&uberblock_tree, cksum_record_compare,

48
tests/zfs-tests/tests/functional/cli_root/zpool_create/create-o_ashift.ksh
View File

@ -42,54 +42,47 @@
verify_runnable "global"
# See issue: https://github.com/zfsonlinux/zfs/issues/6924
if is_linux; then
log_unsupported "Test case occasionally fails"
fi
function cleanup
{
poolexists $TESTPOOL && destroy_pool $TESTPOOL
destroy_pool $TESTPOOL
log_must rm -f $disk
}
#
# Commit the specified number of TXGs to the provided pool
# We use 'zpool sync' here because we can't force it via sync(1) like on illumos
# $1 pool name
# $2 number of txg syncs
# Fill the uberblock ring in every <device> label: we do this by committing
# TXGs to the provided <pool> until every slot contains a valid uberblock.
# NOTE: We use 'zpool sync' here because we can't force it via sync(1) like on
# illumos
#
function txg_sync
function write_device_uberblocks # <device> <pool>
{
typeset pool=$1
typeset -i count=$2
typeset -i i=0;
typeset device=$1
typeset pool=$2
while [ $i -lt $count ]
while [ "$(zdb -quuul $device | grep -c 'invalid')" -ne 0 ]
do
log_must sync_pool $pool true
((i = i + 1))
sync_pool $pool true
done
}
#
# Verify device $1 labels contains $2 valid uberblocks in every label
# $1 device
# $2 uberblocks count
# Verify every label on <device> contains <count> (valid) uberblocks
#
function verify_device_uberblocks
function verify_device_uberblocks # <device> <count>
{
typeset device=$1
typeset ubcount=$2
zdb -quuul $device | egrep '^(\s+)?Uberblock' |
egrep -v 'invalid$' | awk \
-v ubcount=$ubcount '{ uberblocks[$0]++; }
END { for (i in uberblocks) {
count++;
awk -v ubcount=$ubcount 'BEGIN { count=0 } { uberblocks[$0]++; }
END {
for (i in uberblocks) {
if (i ~ /invalid/) { continue; }
if (uberblocks[i] != 4) { exit 1; }
count++;
}
if (count != ubcount) { exit 1; } }'
if (count != ubcount) { exit 1; }
}'
return $?
}
@ -115,8 +108,7 @@ do
log_fail "Pool was created without setting ashift value to "\
"$ashift (current = $pprop)"
fi
# force 128 txg sync to fill the uberblock ring
txg_sync $TESTPOOL 128
write_device_uberblocks $disk $TESTPOOL
verify_device_uberblocks $disk ${ubcount[$i]}
if [[ $? -ne 0 ]]
then