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[v2,bpf-next,11/17] bpf: Add bpf_local_storage_free()

Message ID 20230308065936.1550103-12-martin.lau@linux.dev (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series bpf: Use bpf_mem_cache_alloc/free in bpf_local_storage | expand

Checks

Context Check Description
netdev/series_format fail Series longer than 15 patches (and no cover letter)
netdev/tree_selection success Clearly marked for bpf-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 20 this patch: 20
netdev/cc_maintainers warning 7 maintainers not CCed: song@kernel.org sdf@google.com haoluo@google.com yhs@fb.com john.fastabend@gmail.com kpsingh@kernel.org jolsa@kernel.org
netdev/build_clang success Errors and warnings before: 18 this patch: 18
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netdev/deprecated_api success None detected
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: 20 this patch: 20
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 47 lines checked
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Commit Message

Martin KaFai Lau March 8, 2023, 6:59 a.m. UTC 
From: Martin KaFai Lau <martin.lau@kernel.org>

This patch refactors local_storage freeing logic into
bpf_local_storage_free(). It is a preparation work for a later
patch that uses bpf_mem_cache_alloc/free. The other kfree(local_storage)
cases are also changed to bpf_local_storage_free(..., reuse_now = true).

Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
---
 kernel/bpf/bpf_local_storage.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/kernel/bpf/bpf_local_storage.c b/kernel/bpf/bpf_local_storage.c
index 0fbc477c8b27..351d991694cb 100644
--- a/kernel/bpf/bpf_local_storage.c
+++ b/kernel/bpf/bpf_local_storage.c
@@ -114,6 +114,16 @@  static void bpf_local_storage_free_trace_rcu(struct rcu_head *rcu)
 		call_rcu(rcu, bpf_local_storage_free_rcu);
 }
 
+static void bpf_local_storage_free(struct bpf_local_storage *local_storage,
+				   bool reuse_now)
+{
+	if (!reuse_now)
+		call_rcu_tasks_trace(&local_storage->rcu,
+				     bpf_local_storage_free_trace_rcu);
+	else
+		call_rcu(&local_storage->rcu, bpf_local_storage_free_rcu);
+}
+
 static void bpf_selem_free_rcu(struct rcu_head *rcu)
 {
 	struct bpf_local_storage_elem *selem;
@@ -218,13 +228,8 @@  static void bpf_selem_unlink_storage(struct bpf_local_storage_elem *selem,
 			local_storage, selem, true, reuse_now);
 	raw_spin_unlock_irqrestore(&local_storage->lock, flags);
 
-	if (free_local_storage) {
-		if (!reuse_now)
-			call_rcu_tasks_trace(&local_storage->rcu,
-				     bpf_local_storage_free_trace_rcu);
-		else
-			call_rcu(&local_storage->rcu, bpf_local_storage_free_rcu);
-	}
+	if (free_local_storage)
+		bpf_local_storage_free(local_storage, reuse_now);
 }
 
 void bpf_selem_link_storage_nolock(struct bpf_local_storage *local_storage,
@@ -391,7 +396,7 @@  int bpf_local_storage_alloc(void *owner,
 	return 0;
 
 uncharge:
-	kfree(storage);
+	bpf_local_storage_free(storage, true);
 	mem_uncharge(smap, owner, sizeof(*storage));
 	return err;
 }
@@ -636,7 +641,7 @@  void bpf_local_storage_destroy(struct bpf_local_storage *local_storage)
 	raw_spin_unlock_irqrestore(&local_storage->lock, flags);
 
 	if (free_storage)
-		call_rcu(&local_storage->rcu, bpf_local_storage_free_rcu);
+		bpf_local_storage_free(local_storage, true);
 }
 
 u64 bpf_local_storage_map_mem_usage(const struct bpf_map *map)