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| author | Michal Koutný <mkoutny@suse.com> | 2024-02-01 14:09:42 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-02-02 10:57:55 -0800 |
| commit | 2c15a5aee2f32e341d1585fa1867eece76a1edb8 (patch) | |
| tree | 2bd5ff1f5cc96cc16cf7454dccd16284676a7a72 /net/sched/sch_api.c | |
| parent | 241a94abcf465ba9363d93168da5ddd47002930f (diff) | |
| download | linux-2c15a5aee2f32e341d1585fa1867eece76a1edb8.tar.gz linux-2c15a5aee2f32e341d1585fa1867eece76a1edb8.tar.bz2 linux-2c15a5aee2f32e341d1585fa1867eece76a1edb8.zip | |
net/sched: Load modules via their alias
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 7f78e0351394 ("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>
Diffstat (limited to 'net/sched/sch_api.c')
| -rw-r--r-- | net/sched/sch_api.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index 36b025cc4fd2..9d928f6a473a 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -228,7 +228,7 @@ int qdisc_set_default(const char *name) if (!ops) { /* Not found, drop lock and try to load module */ write_unlock(&qdisc_mod_lock); - request_module("sch_%s", name); + request_module(NET_SCH_ALIAS_PREFIX "%s", name); write_lock(&qdisc_mod_lock); ops = qdisc_lookup_default(name); @@ -1275,7 +1275,7 @@ static struct Qdisc *qdisc_create(struct net_device *dev, * go away in the mean time. */ rtnl_unlock(); - request_module("sch_%s", name); + request_module(NET_SCH_ALIAS_PREFIX "%s", name); rtnl_lock(); ops = qdisc_lookup_ops(kind); if (ops != NULL) { |