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
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@ -2788,10 +2788,6 @@ dump_label(const char *dev)
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exit(1);
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}
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if (ioctl(fd, BLKFLSBUF) != 0)
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(void) printf("failed to invalidate cache '%s' : %s\n", path,
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strerror(errno));
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if (fstat64_blk(fd, &statbuf) != 0) {
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(void) printf("failed to stat '%s': %s\n", path,
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strerror(errno));
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@ -2799,6 +2795,10 @@ dump_label(const char *dev)
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exit(1);
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}
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if (S_ISBLK(statbuf.st_mode) && ioctl(fd, BLKFLSBUF) != 0)
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(void) printf("failed to invalidate cache '%s' : %s\n", path,
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strerror(errno));
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avl_create(&config_tree, cksum_record_compare,
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sizeof (cksum_record_t), offsetof(cksum_record_t, link));
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avl_create(&uberblock_tree, cksum_record_compare,
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@ -42,54 +42,47 @@
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verify_runnable "global"
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# See issue: https://github.com/zfsonlinux/zfs/issues/6924
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if is_linux; then
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log_unsupported "Test case occasionally fails"
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fi
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function cleanup
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{
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poolexists $TESTPOOL && destroy_pool $TESTPOOL
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destroy_pool $TESTPOOL
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log_must rm -f $disk
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}
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#
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# Commit the specified number of TXGs to the provided pool
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# We use 'zpool sync' here because we can't force it via sync(1) like on illumos
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# $1 pool name
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# $2 number of txg syncs
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# Fill the uberblock ring in every <device> label: we do this by committing
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# TXGs to the provided <pool> until every slot contains a valid uberblock.
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# NOTE: We use 'zpool sync' here because we can't force it via sync(1) like on
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# illumos
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#
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function txg_sync
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function write_device_uberblocks # <device> <pool>
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{
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typeset pool=$1
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typeset -i count=$2
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typeset -i i=0;
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typeset device=$1
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typeset pool=$2
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while [ $i -lt $count ]
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while [ "$(zdb -quuul $device | grep -c 'invalid')" -ne 0 ]
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do
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log_must sync_pool $pool true
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((i = i + 1))
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sync_pool $pool true
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done
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}
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#
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# Verify device $1 labels contains $2 valid uberblocks in every label
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# $1 device
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# $2 uberblocks count
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# Verify every label on <device> contains <count> (valid) uberblocks
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#
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function verify_device_uberblocks
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function verify_device_uberblocks # <device> <count>
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{
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typeset device=$1
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typeset ubcount=$2
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zdb -quuul $device | egrep '^(\s+)?Uberblock' |
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egrep -v 'invalid$' | awk \
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-v ubcount=$ubcount '{ uberblocks[$0]++; }
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END { for (i in uberblocks) {
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count++;
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if (uberblocks[i] != 4) { exit 1; }
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}
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if (count != ubcount) { exit 1; } }'
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awk -v ubcount=$ubcount 'BEGIN { count=0 } { uberblocks[$0]++; }
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END {
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for (i in uberblocks) {
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if (i ~ /invalid/) { continue; }
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if (uberblocks[i] != 4) { exit 1; }
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count++;
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}
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if (count != ubcount) { exit 1; }
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}'
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return $?
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}
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@ -115,8 +108,7 @@ do
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log_fail "Pool was created without setting ashift value to "\
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"$ashift (current = $pprop)"
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fi
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# force 128 txg sync to fill the uberblock ring
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txg_sync $TESTPOOL 128
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write_device_uberblocks $disk $TESTPOOL
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verify_device_uberblocks $disk ${ubcount[$i]}
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if [[ $? -ne 0 ]]
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then
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