From 0677519ab94d2cf03c13e6e8cd6450d84bb09320 Mon Sep 17 00:00:00 2001 From: Harald Freudenberger Date: Tue, 11 May 2021 15:01:18 +0200 Subject: [PATCH] s390/ap: extend AP change bindings-complete uevent with counter Userspace udev rules need an indication about the very first AP change BINDINGS=complete uevent. So now this uevent is extend with an additional key-value entry COMPLETECOUNT=. The very first uevent will show counter=1 and the following BINDINGS=complete uevents increase this counter by 1. Here is an example how the very first BINDINGS=complete uevent looks like: KERNEL[106.079510] change /devices/ap (ap) ACTION=change DEVPATH=/devices/ap SUBSYSTEM=ap BINDINGS=complete COMPLETECOUNT=1 SEQNUM=10686 Signed-off-by: Harald Freudenberger Signed-off-by: Vasily Gorbik --- drivers/s390/crypto/ap_bus.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index 868ff02e92e7..0f088e335397 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0+ /* - * Copyright IBM Corp. 2006, 2020 + * Copyright IBM Corp. 2006, 2021 * Author(s): Cornelia Huck * Martin Schwidefsky * Ralph Wuerthner @@ -77,6 +77,9 @@ EXPORT_SYMBOL(ap_perms_mutex); /* # of bus scans since init */ static atomic64_t ap_scan_bus_count; +/* # of bindings complete since init */ +static atomic64_t ap_bindings_complete_count = ATOMIC64_INIT(0); + /* completion for initial APQN bindings complete */ static DECLARE_COMPLETION(ap_init_apqn_bindings_complete); @@ -613,8 +616,11 @@ static void ap_send_init_scan_done_uevent(void) static void ap_send_bindings_complete_uevent(void) { - char *envp[] = { "BINDINGS=complete", NULL }; + char buf[32]; + char *envp[] = { "BINDINGS=complete", buf, NULL }; + snprintf(buf, sizeof(buf), "COMPLETECOUNT=%llu", + atomic64_inc_return(&ap_bindings_complete_count)); kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); }