diff mbox series

[v4,bpf-next,1/6] bpf: udp: Make mem flags configurable through bpf_iter_udp_realloc_batch

Message ID 20250419155804.2337261-2-jordan@jrife.io (mailing list archive)
State New
Delegated to: BPF
Headers show
Series bpf: udp: Exactly-once socket iteration | expand

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netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
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: 0 this patch: 0
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 5 maintainers not CCed: dsahern@kernel.org edumazet@google.com kuba@kernel.org pabeni@redhat.com horms@kernel.org
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Commit Message

Jordan Rife April 19, 2025, 3:57 p.m. UTC 
Prepare for the next two patches which need to be able to choose either
GFP_USER or GFP_ATOMIC for calls to bpf_iter_udp_realloc_batch by making
memory flags configurable.

Signed-off-by: Jordan Rife <jordan@jrife.io>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 net/ipv4/udp.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index d0bffcfa56d8..0ac31dec339a 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -3395,7 +3395,7 @@  struct bpf_udp_iter_state {
 };
 
 static int bpf_iter_udp_realloc_batch(struct bpf_udp_iter_state *iter,
-				      unsigned int new_batch_sz);
+				      unsigned int new_batch_sz, int flags);
 static struct sock *bpf_iter_udp_batch(struct seq_file *seq)
 {
 	struct bpf_udp_iter_state *iter = seq->private;
@@ -3471,7 +3471,8 @@  static struct sock *bpf_iter_udp_batch(struct seq_file *seq)
 		iter->st_bucket_done = true;
 		goto done;
 	}
-	if (!resized && !bpf_iter_udp_realloc_batch(iter, batch_sks * 3 / 2)) {
+	if (!resized && !bpf_iter_udp_realloc_batch(iter, batch_sks * 3 / 2,
+						    GFP_USER)) {
 		resized = true;
 		/* After allocating a larger batch, retry one more time to grab
 		 * the whole bucket.
@@ -3825,12 +3826,12 @@  DEFINE_BPF_ITER_FUNC(udp, struct bpf_iter_meta *meta,
 		     struct udp_sock *udp_sk, uid_t uid, int bucket)
 
 static int bpf_iter_udp_realloc_batch(struct bpf_udp_iter_state *iter,
-				      unsigned int new_batch_sz)
+				      unsigned int new_batch_sz, int flags)
 {
 	struct sock **new_batch;
 
 	new_batch = kvmalloc_array(new_batch_sz, sizeof(*new_batch),
-				   GFP_USER | __GFP_NOWARN);
+				   flags | __GFP_NOWARN);
 	if (!new_batch)
 		return -ENOMEM;
 
@@ -3853,7 +3854,7 @@  static int bpf_iter_init_udp(void *priv_data, struct bpf_iter_aux_info *aux)
 	if (ret)
 		return ret;
 
-	ret = bpf_iter_udp_realloc_batch(iter, INIT_BATCH_SZ);
+	ret = bpf_iter_udp_realloc_batch(iter, INIT_BATCH_SZ, GFP_USER);
 	if (ret)
 		bpf_iter_fini_seq_net(priv_data);