diff mbox series

[net-next,RFC,05/20] net/sched: act_api: introduce tc_lookup_action_byid()

Message ID 20230124170510.316970-5-jhs@mojatatu.com (mailing list archive)
State RFC
Delegated to: Netdev Maintainers
Headers show
Series Introducing P4TC | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 64 this patch: 64
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 82 this patch: 82
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 33 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Jamal Hadi Salim Jan. 24, 2023, 5:04 p.m. UTC 
Introduce a lookup helper to retrieve the tc_action_ops
instance given its action id.

Co-developed-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: Victor Nogueira <victor@mojatatu.com>
Co-developed-by: Pedro Tammela <pctammela@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
---
 include/net/act_api.h |  1 +
 net/sched/act_api.c   | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)
diff mbox series

Patch

diff --git a/include/net/act_api.h b/include/net/act_api.h
index 64dc75ba6..083557e51 100644
--- a/include/net/act_api.h
+++ b/include/net/act_api.h
@@ -204,6 +204,7 @@  int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
 int tcf_idr_release(struct tc_action *a, bool bind);
 
 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
+struct tc_action_ops *tc_lookup_action_byid(u32 act_id);
 int tcf_unregister_action(struct tc_action_ops *a,
 			  struct pernet_operations *ops);
 int tcf_action_destroy(struct tc_action *actions[], int bind);
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 622b8d3c5..c5dca2085 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1020,6 +1020,26 @@  int tcf_unregister_action(struct tc_action_ops *act,
 }
 EXPORT_SYMBOL(tcf_unregister_action);
 
+/* lookup by ID */
+struct tc_action_ops *tc_lookup_action_byid(u32 act_id)
+{
+	struct tc_action_ops *a, *res = NULL;
+
+	if (!act_id)
+		return NULL;
+
+	read_lock(&act_mod_lock);
+
+	a = idr_find(&act_base, act_id);
+	if (a && try_module_get(a->owner))
+		res = a;
+
+	read_unlock(&act_mod_lock);
+
+	return res;
+}
+EXPORT_SYMBOL(tc_lookup_action_byid);
+
 /* lookup by name */
 static struct tc_action_ops *tc_lookup_action_n(char *kind)
 {