kernel/linux.git/net/core/selftests.c, branch v6.19.11

net: selftests: export packet creation helpers for driver use

2025-11-06T12:38:11+00:00

Export the network selftest packet creation infrastructure to allow network drivers to reuse the existing selftest framework instead of duplicating packet creation code. Signed-off-by: Raju Rangoju Reviewed-by: Maxime Chevallier Link: https://patch.msgid.link/20251031111811.775434-1-Raju.Rangoju@amd.com Signed-off-by: Paolo Abeni

net: selftests: add PHY-loopback test for bad TCP checksums

2025-07-19T00:19:46+00:00

Detect NICs and drivers that either drop frames with a corrupted TCP checksum or, worse, pass them up as valid. The test flips one bit in the checksum, transmits the packet in internal loopback, and fails when the driver reports CHECKSUM_UNNECESSARY. Discussed at: https://lore.kernel.org/all/20250625132117.1b3264e8@kernel.org/ Signed-off-by: Oleksij Rempel Reviewed-by: Simon Horman Link: https://patch.msgid.link/20250717083524.1645069-1-o.rempel@pengutronix.de Signed-off-by: Jakub Kicinski

net: selftests: fix TCP packet checksum

2025-06-26T08:50:49+00:00

The length in the pseudo header should be the length of the L3 payload AKA the L4 header+payload. The selftest code builds the packet from the lower layers up, so all the headers are pushed already when it constructs L4. We need to subtract the lower layer headers from skb->len. Fixes: 3e1e58d64c3d ("net: add generic selftest support") Signed-off-by: Jakub Kicinski Reviewed-by: Gerhard Engleder Reported-by: Oleksij Rempel Tested-by: Oleksij Rempel Reviewed-by: Oleksij Rempel Link: https://patch.msgid.link/20250624183258.3377740-1-kuba@kernel.org Signed-off-by: Paolo Abeni

net: selftests: initialize TCP header and skb payload with zero

2025-04-22T13:30:35+00:00

Zero-initialize TCP header via memset() to avoid garbage values that may affect checksum or behavior during test transmission. Also zero-fill allocated payload and padding regions using memset() after skb_put(), ensuring deterministic content for all outgoing test packets. Fixes: 3e1e58d64c3d ("net: add generic selftest support") Signed-off-by: Oleksij Rempel Cc: stable@vger.kernel.org Reviewed-by: Simon Horman Link: https://patch.msgid.link/20250416160125.2914724-1-o.rempel@pengutronix.de Signed-off-by: Paolo Abeni

net: phy: Support speed selection for PHY loopback

2025-03-20T07:45:08+00:00

phy_loopback() leaves it to the PHY driver to select the speed of the loopback mode. Thus, the speed of the loopback mode depends on the PHY driver in use. Add support for speed selection to phy_loopback() to enable loopback with defined speeds. Ensure that link up is signaled if speed changes as speed is not allowed to change during link up. Link down and up is necessary for a new speed. Signed-off-by: Gerhard Engleder Link: https://patch.msgid.link/20250312203010.47429-3-gerhard@engleder-embedded.com Signed-off-by: Paolo Abeni

net: fill in MODULE_DESCRIPTION()s under net/core

2023-10-28T10:29:27+00:00

W=1 builds now warn if module is built without a MODULE_DESCRIPTION(). Reviewed-by: Oleksij Rempel Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller

net: selftests: use ethtool_sprintf()

2023-10-27T15:09:26+00:00

During a W=1 build GCC 13.2 says: net/core/selftests.c: In function ‘net_selftest_get_strings’: net/core/selftests.c:404:52: error: ‘%s’ directive output may be truncated writing up to 279 bytes into a region of size 28 [-Werror=format-truncation=] 404 | snprintf(p, ETH_GSTRING_LEN, "%2d. %s", i + 1, | ^~ net/core/selftests.c:404:17: note: ‘snprintf’ output between 5 and 284 bytes into a destination of size 32 404 | snprintf(p, ETH_GSTRING_LEN, "%2d. %s", i + 1, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 405 | net_selftests[i].name); | ~~~~~~~~~~~~~~~~~~~~~~ avoid it by using ethtool_sprintf(). Reviewed-by: Oleksij Rempel Tested-by: Oleksij Rempel Link: https://lore.kernel.org/r/20231026022916.566661-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

net: core: constify mac addrs in selftests

2021-10-24T12:59:44+00:00

Get it ready for constant netdev->dev_addr. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller

net: selftests: add MTU test

2021-07-22T07:52:04+00:00

Test if we actually can send/receive packets with MTU size. This kind of issue was detected on ASIX HW with bogus EEPROM. Signed-off-by: Oleksij Rempel Signed-off-by: David S. Miller

net: add generic selftest support

2021-04-20T23:08:02+00:00

Port some parts of the stmmac selftest and reuse it as basic generic selftest library. This patch was tested with following combinations: - iMX6DL FEC -> AT8035 - iMX6DL FEC -> SJA1105Q switch -> KSZ8081 - iMX6DL FEC -> SJA1105Q switch -> KSZ9031 - AR9331 ag71xx -> AR9331 PHY - AR9331 ag71xx -> AR9331 switch -> AR9331 PHY Signed-off-by: Oleksij Rempel Signed-off-by: David S. Miller