| Message ID | 20210412154130.20742-6-boon.leong.ong@intel.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | stmmac: add XDP ZC support | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Link |
| netdev/fixes_present | success | Link |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Clearly marked for net-next |
| netdev/subject_prefix | success | Link |
| netdev/cc_maintainers | warning | 1 maintainers not CCed: alexandre.torgue@foss.st.com |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Link |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | Link |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 49 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/header_inline | success | Link |
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 0804674e628e..329a3abbac76 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -4408,20 +4408,13 @@ static int stmmac_xdp_xmit_back(struct stmmac_priv *priv, return res; } -static struct sk_buff *stmmac_xdp_run_prog(struct stmmac_priv *priv, - struct xdp_buff *xdp) +/* This function assumes rcu_read_lock() is held by the caller. */ +static int __stmmac_xdp_run_prog(struct stmmac_priv *priv, + struct bpf_prog *prog, + struct xdp_buff *xdp) { - struct bpf_prog *prog; - int res; u32 act; - - rcu_read_lock(); - - prog = READ_ONCE(priv->xdp_prog); - if (!prog) { - res = STMMAC_XDP_PASS; - goto unlock; - } + int res; act = bpf_prog_run_xdp(prog, xdp); switch (act) { @@ -4448,6 +4441,24 @@ static struct sk_buff *stmmac_xdp_run_prog(struct stmmac_priv *priv, break; } + return res; +} + +static struct sk_buff *stmmac_xdp_run_prog(struct stmmac_priv *priv, + struct xdp_buff *xdp) +{ + struct bpf_prog *prog; + int res; + + rcu_read_lock(); + + prog = READ_ONCE(priv->xdp_prog); + if (!prog) { + res = STMMAC_XDP_PASS; + goto unlock; + } + + res = __stmmac_xdp_run_prog(priv, prog, xdp); unlock: rcu_read_unlock(); return ERR_PTR(-res);
Prepare stmmac_xdp_run_prog() for AF_XDP zero-copy support which will be added by upcoming patches by splitting out the XDP verdict processing into __stmmac_xdp_run_prog() and it callable for XDP ZC path which does not need to verify bpf_prog is not NULL. The stmmac_xdp_run_prog() is used for regular XDP Rx path which requires bpf_prog to be verified. Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com> --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 35 ++++++++++++------- 1 file changed, 23 insertions(+), 12 deletions(-)