net/sched: Load modules via their alias

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The cls_,sch_,act_ modules may be loaded lazily during network
configuration but without user's awareness and control.

Switch the lazy loading from canonical module names to a module alias.
This allows finer control over lazy loading, the precedent from
commit 7f78e03513 ("fs: Limit sys_mount to only request filesystem
modules.") explains it already:

	Using aliases means user space can control the policy of which
	filesystem^W net/sched modules are auto-loaded by editing
	/etc/modprobe.d/*.conf with blacklist and alias directives.
	Allowing simple, safe, well understood work-arounds to known
	problematic software.

By default, nothing changes. However, if a specific module is
blacklisted (its canonical name), it won't be modprobe'd when requested
under its alias (i.e. kernel auto-loading). It would appear as if the
given module was unknown.

The module can still be loaded under its canonical name, which is an
explicit (privileged) user action.

Signed-off-by: Michal Koutný <mkoutny@suse.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240201130943.19536-4-mkoutny@suse.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Michal Koutný 2024-02-01 14:09:42 +01:00 • committed by Jakub Kicinski

parent 241a94abcf

commit 2c15a5aee2

3 changed files with 4 additions and 4 deletions

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2

net/sched/act_api.c

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2

net/sched/cls_api.c

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4

net/sched/sch_api.c

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