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Install each module from its real build directory, propagate staged install roots, and fail when kbuild modules_install fails. Add a rootless CTest and CI regression for successful and failed installs.
Best practices followed:
Use the standard CMake DESTDIR and kbuild INSTALL_MOD_PATH staging interfaces:
https://cmake.org/cmake/help/latest/envvar/DESTDIR.html
https://docs.kernel.org/kbuild/modules.html#install-mod-path
Check child command status with execute_process RESULT_VARIABLE:
https://cmake.org/cmake/help/latest/command/execute_process.html
Register repeatable tests with CTest add_test:
https://cmake.org/cmake/help/latest/command/add_test.html
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The vlan_mon driver registers a global packet_type with type=ETH_P_ALL
to intercept PADI/IP/ARP frames before they reach the protocol stack.
Since Linux 6.6 the per-net-namespace ptype_all conversion (commit
"net: af_packet: switch ptype_all to per-net-namespace lists") requires
every ETH_P_ALL packet_type to have either ->dev or ->af_packet_net
set; ptype_head() now does:
WARN_ON_ONCE(!pt->af_packet_net && !pt->dev);
return pt->dev ? &pt->dev->ptype_all
: &pt->af_packet_net->ptype_all;
With both fields NULL on our static vlan_pt, dev_add_pack() trips the
WARN at module load and the handler is never linked into any usable
list, so vlan_pt_recv() is never invoked. Userspace sets up the
genetlink subscription correctly and gets a clean ACK from
VLAN_MON_CMD_ADD, but no notifications ever arrive because the kernel
side never sees the PADI. PPPoE-over-VLAN tests time out waiting for
PADO.
This was visible on Ubuntu's 6.17 azure kernel as a backtrace from
vlan_mon_init -> dev_add_pack at net/core/dev.c:609 in dmesg, and as
a silent failure of tests/accel-pppd/pppoe/test_pppoe_vlan_mon.
Set vlan_pt.af_packet_net = &init_net before dev_add_pack() on kernels
new enough to require it. The driver only operates in init_net anyway
(all dev_get_by_index() calls are against &init_net), so this matches
existing behaviour.
Signed-off-by: Denys Fedoryshchenko <denys.f@collabora.com>
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Signed-off-by: Sergey V. Lobanov <sergey@lobanov.in>
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Signed-off-by: Denys Fedoryshchenko <denys.f@collabora.com>
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Co-authored-by: Martin Zaharinov <micron@bngsoft.net>
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This reverts commit f67292499b20f599f2bd744d2dcf0f6779581787.
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if autoclean=1 then vlan_mon will delete all vlan interfaces created by previous accel-pppd run
f.e. vlan_mon cleans created interfaces if accel-pppd restarts
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on same interfaces (started by vlan_mon)
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introduced new module "vlan-mon"
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