diff mbox series

[v2,bpf-next,4/6] xsk: carry a copy of xdp_zc_max_segs within xsk_buff_pool

Message ID 20241007122458.282590-5-maciej.fijalkowski@intel.com (mailing list archive)
State Accepted
Commit 6e126872191df946a6fe01b79273119d32d96711
Delegated to: BPF
Headers show
Series xsk: struct diet and cleanups | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next
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: 6 this patch: 6
netdev/build_tools success Errors and warnings before: 0 (+1) this patch: 0 (+1)
netdev/cc_maintainers warning 6 maintainers not CCed: edumazet@google.com john.fastabend@gmail.com kuba@kernel.org jonathan.lemon@gmail.com pabeni@redhat.com hawk@kernel.org
netdev/build_clang success Errors and warnings before: 6 this patch: 6
netdev/verify_signedoff success Signed-off-by tag matches author and committer
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: 36 this patch: 36
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 22 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
bpf/vmtest-bpf-next-PR success PR summary
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Commit Message

Maciej Fijalkowski Oct. 7, 2024, 12:24 p.m. UTC 
This so we avoid dereferencing struct net_device within hot path.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
---
 include/net/xsk_buff_pool.h | 1 +
 net/xdp/xsk_buff_pool.c     | 1 +
 net/xdp/xsk_queue.h         | 2 +-
 3 files changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/net/xsk_buff_pool.h b/include/net/xsk_buff_pool.h
index 468a23b1b4c5..bb03cee716b3 100644
--- a/include/net/xsk_buff_pool.h
+++ b/include/net/xsk_buff_pool.h
@@ -76,6 +76,7 @@  struct xsk_buff_pool {
 	u32 chunk_size;
 	u32 chunk_shift;
 	u32 frame_len;
+	u32 xdp_zc_max_segs;
 	u8 tx_metadata_len; /* inherited from umem */
 	u8 cached_need_wakeup;
 	bool uses_need_wakeup;
diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index 7ecd4ccd2473..e946ba4a5ccf 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -229,6 +229,7 @@  int xp_assign_dev(struct xsk_buff_pool *pool,
 		goto err_unreg_xsk;
 	}
 	pool->umem->zc = true;
+	pool->xdp_zc_max_segs = netdev->xdp_zc_max_segs;
 	return 0;
 
 err_unreg_xsk:
diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
index 406b20dfee8d..46d87e961ad6 100644
--- a/net/xdp/xsk_queue.h
+++ b/net/xdp/xsk_queue.h
@@ -260,7 +260,7 @@  u32 xskq_cons_read_desc_batch(struct xsk_queue *q, struct xsk_buff_pool *pool,
 			nr_frags = 0;
 		} else {
 			nr_frags++;
-			if (nr_frags == pool->netdev->xdp_zc_max_segs) {
+			if (nr_frags == pool->xdp_zc_max_segs) {
 				nr_frags = 0;
 				break;
 			}