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| author |   Harald Freudenberger <freude@linux.ibm.com> | 2021-05-11 15:01:18 +0200 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2021-06-07 17:07:00 +0200 |
| commit | 0677519ab94d2cf03c13e6e8cd6450d84bb09320 (patch) | |
| tree | 8a8eed9413fd756475e30e5f431e8b4ea57d5e0b /drivers/s390/crypto/ap_bus.c | |
| parent | s390/smp: remove redundant pcpu::lowcore member (diff) | |
| download | linux-dev-0677519ab94d2cf03c13e6e8cd6450d84bb09320.tar.xz linux-dev-0677519ab94d2cf03c13e6e8cd6450d84bb09320.zip | |
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=<counter>. 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 <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/s390/crypto/ap_bus.c')
| -rw-r--r-- | drivers/s390/crypto/ap_bus.c | 10 |
1 files 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 <cornelia.huck@de.ibm.com> * Martin Schwidefsky <schwidefsky@de.ibm.com> * Ralph Wuerthner <rwuerthn@de.ibm.com> @@ -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); } |