Hi Sridhar, I love your patch! Yet something to improve: [auto build test ERROR on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Sridhar-Samudrala/xsk-Convert-bool-zc-field-in-struct-xdp_umem-to-a-u32-bitmap/20190816-144642 base: https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: x86_64-lkp (attached as .config) compiler: gcc-7 (Debian 7.4.0-10) 7.4.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/net/ethernet/intel/i40e/i40e_txrx.c: In function 'i40e_run_xdp': >> drivers/net/ethernet/intel/i40e/i40e_txrx.c:2215:9: error: implicit declaration of function 'xsk_umem_rcv'; did you mean 'xsk_rcv'? [-Werror=implicit-function-declaration] err = xsk_umem_rcv(umem, xdp); ^~~~~~~~~~~~ xsk_rcv drivers/net/ethernet/intel/i40e/i40e_txrx.c: In function 'i40e_finalize_xdp_rx': >> drivers/net/ethernet/intel/i40e/i40e_txrx.c:2322:4: error: implicit declaration of function 'xsk_umem_flush'; did you mean 'xsk_umem_fq_reuse'? [-Werror=implicit-function-declaration] xsk_umem_flush(umem); ^~~~~~~~~~~~~~ xsk_umem_fq_reuse cc1: some warnings being treated as errors -- drivers/net/ethernet/intel/i40e/i40e_xsk.c: In function 'i40e_run_xdp_zc': >> drivers/net/ethernet/intel/i40e/i40e_xsk.c:199:9: error: implicit declaration of function 'xsk_umem_rcv'; did you mean 'xsk_rcv'? [-Werror=implicit-function-declaration] err = xsk_umem_rcv(rx_ring->xsk_umem, xdp); ^~~~~~~~~~~~ xsk_rcv cc1: some warnings being treated as errors vim +2215 drivers/net/ethernet/intel/i40e/i40e_txrx.c 2190 2191 /** 2192 * i40e_run_xdp - run an XDP program 2193 * @rx_ring: Rx ring being processed 2194 * @xdp: XDP buffer containing the frame 2195 **/ 2196 static struct sk_buff *i40e_run_xdp(struct i40e_ring *rx_ring, 2197 struct xdp_buff *xdp) 2198 { 2199 int err, result = I40E_XDP_PASS; 2200 struct i40e_ring *xdp_ring; 2201 struct bpf_prog *xdp_prog; 2202 struct xdp_umem *umem; 2203 u32 act; 2204 2205 rcu_read_lock(); 2206 xdp_prog = READ_ONCE(rx_ring->xdp_prog); 2207 2208 if (!xdp_prog) 2209 goto xdp_out; 2210 2211 prefetchw(xdp->data_hard_start); /* xdp_frame write */ 2212 2213 umem = xdp_get_umem_from_qid(rx_ring->netdev, rx_ring->queue_index); 2214 if (xsk_umem_skip_bpf(umem)) { > 2215 err = xsk_umem_rcv(umem, xdp); 2216 result = !err ? I40E_XDP_REDIR : I40E_XDP_CONSUMED; 2217 goto xdp_out; 2218 } 2219 2220 act = bpf_prog_run_xdp(xdp_prog, xdp); 2221 switch (act) { 2222 case XDP_PASS: 2223 break; 2224 case XDP_TX: 2225 xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->queue_index]; 2226 result = i40e_xmit_xdp_tx_ring(xdp, xdp_ring); 2227 break; 2228 case XDP_REDIRECT: 2229 err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); 2230 result = !err ? I40E_XDP_REDIR : I40E_XDP_CONSUMED; 2231 break; 2232 default: 2233 bpf_warn_invalid_xdp_action(act); 2234 /* fall through */ 2235 case XDP_ABORTED: 2236 trace_xdp_exception(rx_ring->netdev, xdp_prog, act); 2237 /* fall through -- handle aborts by dropping packet */ 2238 case XDP_DROP: 2239 result = I40E_XDP_CONSUMED; 2240 break; 2241 } 2242 xdp_out: 2243 rcu_read_unlock(); 2244 return ERR_PTR(-result); 2245 } 2246 2247 /** 2248 * i40e_rx_buffer_flip - adjusted rx_buffer to point to an unused region 2249 * @rx_ring: Rx ring 2250 * @rx_buffer: Rx buffer to adjust 2251 * @size: Size of adjustment 2252 **/ 2253 static void i40e_rx_buffer_flip(struct i40e_ring *rx_ring, 2254 struct i40e_rx_buffer *rx_buffer, 2255 unsigned int size) 2256 { 2257 #if (PAGE_SIZE < 8192) 2258 unsigned int truesize = i40e_rx_pg_size(rx_ring) / 2; 2259 2260 rx_buffer->page_offset ^= truesize; 2261 #else 2262 unsigned int truesize = SKB_DATA_ALIGN(i40e_rx_offset(rx_ring) + size); 2263 2264 rx_buffer->page_offset += truesize; 2265 #endif 2266 } 2267 2268 /** 2269 * i40e_xdp_ring_update_tail - Updates the XDP Tx ring tail register 2270 * @xdp_ring: XDP Tx ring 2271 * 2272 * This function updates the XDP Tx ring tail register. 2273 **/ 2274 void i40e_xdp_ring_update_tail(struct i40e_ring *xdp_ring) 2275 { 2276 /* Force memory writes to complete before letting h/w 2277 * know there are new descriptors to fetch. 2278 */ 2279 wmb(); 2280 writel_relaxed(xdp_ring->next_to_use, xdp_ring->tail); 2281 } 2282 2283 /** 2284 * i40e_update_rx_stats - Update Rx ring statistics 2285 * @rx_ring: rx descriptor ring 2286 * @total_rx_bytes: number of bytes received 2287 * @total_rx_packets: number of packets received 2288 * 2289 * This function updates the Rx ring statistics. 2290 **/ 2291 void i40e_update_rx_stats(struct i40e_ring *rx_ring, 2292 unsigned int total_rx_bytes, 2293 unsigned int total_rx_packets) 2294 { 2295 u64_stats_update_begin(&rx_ring->syncp); 2296 rx_ring->stats.packets += total_rx_packets; 2297 rx_ring->stats.bytes += total_rx_bytes; 2298 u64_stats_update_end(&rx_ring->syncp); 2299 rx_ring->q_vector->rx.total_packets += total_rx_packets; 2300 rx_ring->q_vector->rx.total_bytes += total_rx_bytes; 2301 } 2302 2303 /** 2304 * i40e_finalize_xdp_rx - Bump XDP Tx tail and/or flush redirect map 2305 * @rx_ring: Rx ring 2306 * @xdp_res: Result of the receive batch 2307 * 2308 * This function bumps XDP Tx tail and/or flush redirect map, and 2309 * should be called when a batch of packets has been processed in the 2310 * napi loop. 2311 **/ 2312 void i40e_finalize_xdp_rx(struct i40e_ring *rx_ring, unsigned int xdp_res) 2313 { 2314 if (xdp_res & I40E_XDP_REDIR) { 2315 struct xdp_umem *umem; 2316 2317 umem = rx_ring->xsk_umem; 2318 if (!umem) 2319 umem = xdp_get_umem_from_qid(rx_ring->netdev, 2320 rx_ring->queue_index); 2321 if (xsk_umem_skip_bpf(umem)) > 2322 xsk_umem_flush(umem); 2323 else 2324 xdp_do_flush_map(); 2325 } 2326 2327 if (xdp_res & I40E_XDP_TX) { 2328 struct i40e_ring *xdp_ring = 2329 rx_ring->vsi->xdp_rings[rx_ring->queue_index]; 2330 2331 i40e_xdp_ring_update_tail(xdp_ring); 2332 } 2333 } 2334 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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