Amit Cohen cad797ceee selftests: forwarding: devlink_lib: Wait for udev events after reloading ... [ Upstream commit f67a90a0c8 ] Lately, an additional locking was added by commit c0a40097f0 ("drivers: core: synchronize really_probe() and dev_uevent()"). The locking protects dev_uevent() calling. This function is used to send messages from the kernel to user space. Uevent messages notify user space about changes in device states, such as when a device is added, removed, or changed. These messages are used by udev (or other similar user-space tools) to apply device-specific rules. After reloading devlink instance, udev events should be processed. This locking causes a short delay of udev events handling. One example for useful udev rule is renaming ports. 'forwading.config' can be configured to use names after udev rules are applied. Some tests run devlink_reload() and immediately use the updated names. This worked before the above mentioned commit was pushed, but now the delay of uevent messages causes that devlink_reload() returns before udev events are handled and tests fail. Adjust devlink_reload() to not assume that udev events are already processed when devlink reload is done, instead, wait for udev events to ensure they are processed before returning from the function. Without this patch: TESTS='rif_mac_profile' ./resource_scale.sh TEST: 'rif_mac_profile' 4 [ OK ] sysctl: cannot stat /proc/sys/net/ipv6/conf/swp1/disable_ipv6: No such file or directory sysctl: cannot stat /proc/sys/net/ipv6/conf/swp1/disable_ipv6: No such file or directory sysctl: cannot stat /proc/sys/net/ipv6/conf/swp2/disable_ipv6: No such file or directory sysctl: cannot stat /proc/sys/net/ipv6/conf/swp2/disable_ipv6: No such file or directory Cannot find device "swp1" Cannot find device "swp2" TEST: setup_wait_dev (: Interface swp1 does not come up.) [FAIL] With this patch: $ TESTS='rif_mac_profile' ./resource_scale.sh TEST: 'rif_mac_profile' 4 [ OK ] TEST: 'rif_mac_profile' overflow 5 [ OK ] This is relevant not only for this test. Fixes: bc7cbb1e9f ("selftests: forwarding: Add devlink_lib.sh") Signed-off-by: Amit Cohen <amcohen@nvidia.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: Petr Machata <petrm@nvidia.com> Link: https://patch.msgid.link/89367666e04b38a8993027f1526801ca327ab96a.1720709333.git.petrm@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-08-03 08:59:47 +02:00
..
crypto/chacha20-s390
cxl	cxl/region: check interleave capability	2024-06-25 14:45:27 -07:00
fault-injection
ktest	ktest: force $buildonly = 1 for 'make_warnings_file' test type	2024-03-15 12:36:19 -04:00
kunit	RISC-V SoC Kconfig Updates for v6.10	2024-05-07 11:02:56 +02:00
memblock	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
nvdimm	ndtest: Convert to platform remove callback returning void	2024-04-25 12:37:12 -07:00
radix-tree	tools: fix userspace compilation with new test_xarray changes	2024-05-05 17:28:05 -07:00
scatterlist
selftests	selftests: forwarding: devlink_lib: Wait for udev events after reloading	2024-08-03 08:59:47 +02:00
vsock	vsock/test: print type for SOCK_SEQPACKET	2024-01-25 16:39:21 -08:00