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nbd/client: Fix error messages during NBD_INFO_BLOCK_SIZE 

A missing space makes for poor error messages, and sizes can't
go negative.  Also, we missed diagnosing a server that sends
a maximum block size less than the minimum.

Fixes: 081dd1fe
CC: qemu-stable@nongnu.org
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180501154654.943782-1-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
This commit is contained in:
Eric Blake 2018-05-01 10:46:53 -05:00
parent 16a2227893
commit e475d108f1
1 changed files with 10 additions and 4 deletions
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14
nbd/client.c
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@ -435,8 +435,8 @@ static int nbd_opt_go(QIOChannel *ioc, const char *wantname,
}
be32_to_cpus(&info->min_block);
if (!is_power_of_2(info->min_block)) {
error_setg(errp, "server minimum block size %" PRId32
"is not a power of two", info->min_block);
error_setg(errp, "server minimum block size %" PRIu32
" is not a power of two", info->min_block);
nbd_send_opt_abort(ioc);
return -1;
}
@ -450,8 +450,8 @@ static int nbd_opt_go(QIOChannel *ioc, const char *wantname,
be32_to_cpus(&info->opt_block);
if (!is_power_of_2(info->opt_block) ||
info->opt_block < info->min_block) {
error_setg(errp, "server preferred block size %" PRId32
"is not valid", info->opt_block);
error_setg(errp, "server preferred block size %" PRIu32
" is not valid", info->opt_block);
nbd_send_opt_abort(ioc);
return -1;
}
@ -462,6 +462,12 @@ static int nbd_opt_go(QIOChannel *ioc, const char *wantname,
return -1;
}
be32_to_cpus(&info->max_block);
if (info->max_block < info->min_block) {
error_setg(errp, "server maximum block size %" PRIu32
" is not valid", info->max_block);
nbd_send_opt_abort(ioc);
return -1;
}
trace_nbd_opt_go_info_block_size(info->min_block, info->opt_block,
info->max_block);
break;