Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2018 Chelsio Communications, Inc. |
| 4 | * |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 5 | * Written by: Atul Gupta (atul.gupta@chelsio.com) |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/list.h> |
| 10 | #include <linux/workqueue.h> |
| 11 | #include <linux/skbuff.h> |
| 12 | #include <linux/timer.h> |
| 13 | #include <linux/notifier.h> |
| 14 | #include <linux/inetdevice.h> |
| 15 | #include <linux/ip.h> |
| 16 | #include <linux/tcp.h> |
| 17 | #include <linux/sched/signal.h> |
| 18 | #include <net/tcp.h> |
| 19 | #include <net/busy_poll.h> |
| 20 | #include <crypto/aes.h> |
| 21 | |
| 22 | #include "chtls.h" |
| 23 | #include "chtls_cm.h" |
| 24 | |
| 25 | static bool is_tls_tx(struct chtls_sock *csk) |
| 26 | { |
| 27 | return csk->tlshws.txkey >= 0; |
| 28 | } |
| 29 | |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 30 | static bool is_tls_rx(struct chtls_sock *csk) |
| 31 | { |
| 32 | return csk->tlshws.rxkey >= 0; |
| 33 | } |
| 34 | |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 35 | static int data_sgl_len(const struct sk_buff *skb) |
| 36 | { |
| 37 | unsigned int cnt; |
| 38 | |
| 39 | cnt = skb_shinfo(skb)->nr_frags; |
| 40 | return sgl_len(cnt) * 8; |
| 41 | } |
| 42 | |
| 43 | static int nos_ivs(struct sock *sk, unsigned int size) |
| 44 | { |
| 45 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 46 | |
| 47 | return DIV_ROUND_UP(size, csk->tlshws.mfs); |
| 48 | } |
| 49 | |
| 50 | static int set_ivs_imm(struct sock *sk, const struct sk_buff *skb) |
| 51 | { |
| 52 | int ivs_size = nos_ivs(sk, skb->len) * CIPHER_BLOCK_SIZE; |
| 53 | int hlen = TLS_WR_CPL_LEN + data_sgl_len(skb); |
| 54 | |
| 55 | if ((hlen + KEY_ON_MEM_SZ + ivs_size) < |
| 56 | MAX_IMM_OFLD_TX_DATA_WR_LEN) { |
| 57 | ULP_SKB_CB(skb)->ulp.tls.iv = 1; |
| 58 | return 1; |
| 59 | } |
| 60 | ULP_SKB_CB(skb)->ulp.tls.iv = 0; |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | static int max_ivs_size(struct sock *sk, int size) |
| 65 | { |
| 66 | return nos_ivs(sk, size) * CIPHER_BLOCK_SIZE; |
| 67 | } |
| 68 | |
| 69 | static int ivs_size(struct sock *sk, const struct sk_buff *skb) |
| 70 | { |
| 71 | return set_ivs_imm(sk, skb) ? (nos_ivs(sk, skb->len) * |
| 72 | CIPHER_BLOCK_SIZE) : 0; |
| 73 | } |
| 74 | |
| 75 | static int flowc_wr_credits(int nparams, int *flowclenp) |
| 76 | { |
| 77 | int flowclen16, flowclen; |
| 78 | |
| 79 | flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); |
| 80 | flowclen16 = DIV_ROUND_UP(flowclen, 16); |
| 81 | flowclen = flowclen16 * 16; |
| 82 | |
| 83 | if (flowclenp) |
| 84 | *flowclenp = flowclen; |
| 85 | |
| 86 | return flowclen16; |
| 87 | } |
| 88 | |
| 89 | static struct sk_buff *create_flowc_wr_skb(struct sock *sk, |
| 90 | struct fw_flowc_wr *flowc, |
| 91 | int flowclen) |
| 92 | { |
| 93 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 94 | struct sk_buff *skb; |
| 95 | |
| 96 | skb = alloc_skb(flowclen, GFP_ATOMIC); |
| 97 | if (!skb) |
| 98 | return NULL; |
| 99 | |
| 100 | memcpy(__skb_put(skb, flowclen), flowc, flowclen); |
| 101 | skb_set_queue_mapping(skb, (csk->txq_idx << 1) | CPL_PRIORITY_DATA); |
| 102 | |
| 103 | return skb; |
| 104 | } |
| 105 | |
| 106 | static int send_flowc_wr(struct sock *sk, struct fw_flowc_wr *flowc, |
| 107 | int flowclen) |
| 108 | { |
| 109 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 110 | struct tcp_sock *tp = tcp_sk(sk); |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 111 | struct sk_buff *skb; |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 112 | int flowclen16; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 113 | int ret; |
| 114 | |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 115 | flowclen16 = flowclen / 16; |
| 116 | |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 117 | if (csk_flag(sk, CSK_TX_DATA_SENT)) { |
| 118 | skb = create_flowc_wr_skb(sk, flowc, flowclen); |
| 119 | if (!skb) |
| 120 | return -ENOMEM; |
| 121 | |
| 122 | skb_entail(sk, skb, |
| 123 | ULPCB_FLAG_NO_HDR | ULPCB_FLAG_NO_APPEND); |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | ret = cxgb4_immdata_send(csk->egress_dev, |
| 128 | csk->txq_idx, |
| 129 | flowc, flowclen); |
| 130 | if (!ret) |
| 131 | return flowclen16; |
| 132 | skb = create_flowc_wr_skb(sk, flowc, flowclen); |
| 133 | if (!skb) |
| 134 | return -ENOMEM; |
| 135 | send_or_defer(sk, tp, skb, 0); |
| 136 | return flowclen16; |
| 137 | } |
| 138 | |
| 139 | static u8 tcp_state_to_flowc_state(u8 state) |
| 140 | { |
| 141 | switch (state) { |
| 142 | case TCP_ESTABLISHED: |
| 143 | return FW_FLOWC_MNEM_TCPSTATE_ESTABLISHED; |
| 144 | case TCP_CLOSE_WAIT: |
| 145 | return FW_FLOWC_MNEM_TCPSTATE_CLOSEWAIT; |
| 146 | case TCP_FIN_WAIT1: |
| 147 | return FW_FLOWC_MNEM_TCPSTATE_FINWAIT1; |
| 148 | case TCP_CLOSING: |
| 149 | return FW_FLOWC_MNEM_TCPSTATE_CLOSING; |
| 150 | case TCP_LAST_ACK: |
| 151 | return FW_FLOWC_MNEM_TCPSTATE_LASTACK; |
| 152 | case TCP_FIN_WAIT2: |
| 153 | return FW_FLOWC_MNEM_TCPSTATE_FINWAIT2; |
| 154 | } |
| 155 | |
| 156 | return FW_FLOWC_MNEM_TCPSTATE_ESTABLISHED; |
| 157 | } |
| 158 | |
| 159 | int send_tx_flowc_wr(struct sock *sk, int compl, |
| 160 | u32 snd_nxt, u32 rcv_nxt) |
| 161 | { |
| 162 | struct flowc_packed { |
| 163 | struct fw_flowc_wr fc; |
| 164 | struct fw_flowc_mnemval mnemval[FW_FLOWC_MNEM_MAX]; |
| 165 | } __packed sflowc; |
| 166 | int nparams, paramidx, flowclen16, flowclen; |
| 167 | struct fw_flowc_wr *flowc; |
| 168 | struct chtls_sock *csk; |
| 169 | struct tcp_sock *tp; |
| 170 | |
| 171 | csk = rcu_dereference_sk_user_data(sk); |
| 172 | tp = tcp_sk(sk); |
| 173 | memset(&sflowc, 0, sizeof(sflowc)); |
| 174 | flowc = &sflowc.fc; |
| 175 | |
| 176 | #define FLOWC_PARAM(__m, __v) \ |
| 177 | do { \ |
| 178 | flowc->mnemval[paramidx].mnemonic = FW_FLOWC_MNEM_##__m; \ |
| 179 | flowc->mnemval[paramidx].val = cpu_to_be32(__v); \ |
| 180 | paramidx++; \ |
| 181 | } while (0) |
| 182 | |
| 183 | paramidx = 0; |
| 184 | |
| 185 | FLOWC_PARAM(PFNVFN, FW_PFVF_CMD_PFN_V(csk->cdev->lldi->pf)); |
| 186 | FLOWC_PARAM(CH, csk->tx_chan); |
| 187 | FLOWC_PARAM(PORT, csk->tx_chan); |
| 188 | FLOWC_PARAM(IQID, csk->rss_qid); |
| 189 | FLOWC_PARAM(SNDNXT, tp->snd_nxt); |
| 190 | FLOWC_PARAM(RCVNXT, tp->rcv_nxt); |
| 191 | FLOWC_PARAM(SNDBUF, csk->sndbuf); |
| 192 | FLOWC_PARAM(MSS, tp->mss_cache); |
| 193 | FLOWC_PARAM(TCPSTATE, tcp_state_to_flowc_state(sk->sk_state)); |
| 194 | |
| 195 | if (SND_WSCALE(tp)) |
| 196 | FLOWC_PARAM(RCV_SCALE, SND_WSCALE(tp)); |
| 197 | |
| 198 | if (csk->ulp_mode == ULP_MODE_TLS) |
| 199 | FLOWC_PARAM(ULD_MODE, ULP_MODE_TLS); |
| 200 | |
| 201 | if (csk->tlshws.fcplenmax) |
| 202 | FLOWC_PARAM(TXDATAPLEN_MAX, csk->tlshws.fcplenmax); |
| 203 | |
| 204 | nparams = paramidx; |
| 205 | #undef FLOWC_PARAM |
| 206 | |
| 207 | flowclen16 = flowc_wr_credits(nparams, &flowclen); |
| 208 | flowc->op_to_nparams = |
| 209 | cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) | |
| 210 | FW_WR_COMPL_V(compl) | |
| 211 | FW_FLOWC_WR_NPARAMS_V(nparams)); |
| 212 | flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) | |
| 213 | FW_WR_FLOWID_V(csk->tid)); |
| 214 | |
| 215 | return send_flowc_wr(sk, flowc, flowclen); |
| 216 | } |
| 217 | |
| 218 | /* Copy IVs to WR */ |
| 219 | static int tls_copy_ivs(struct sock *sk, struct sk_buff *skb) |
| 220 | |
| 221 | { |
| 222 | struct chtls_sock *csk; |
| 223 | unsigned char *iv_loc; |
| 224 | struct chtls_hws *hws; |
| 225 | unsigned char *ivs; |
| 226 | u16 number_of_ivs; |
| 227 | struct page *page; |
| 228 | int err = 0; |
| 229 | |
| 230 | csk = rcu_dereference_sk_user_data(sk); |
| 231 | hws = &csk->tlshws; |
| 232 | number_of_ivs = nos_ivs(sk, skb->len); |
| 233 | |
| 234 | if (number_of_ivs > MAX_IVS_PAGE) { |
| 235 | pr_warn("MAX IVs in PAGE exceeded %d\n", number_of_ivs); |
| 236 | return -ENOMEM; |
| 237 | } |
| 238 | |
| 239 | /* generate the IVs */ |
Kees Cook | 6da2ec5 | 2018-06-12 13:55:00 -0700 | [diff] [blame] | 240 | ivs = kmalloc_array(CIPHER_BLOCK_SIZE, number_of_ivs, GFP_ATOMIC); |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 241 | if (!ivs) |
| 242 | return -ENOMEM; |
| 243 | get_random_bytes(ivs, number_of_ivs * CIPHER_BLOCK_SIZE); |
| 244 | |
| 245 | if (skb_ulp_tls_iv_imm(skb)) { |
| 246 | /* send the IVs as immediate data in the WR */ |
| 247 | iv_loc = (unsigned char *)__skb_push(skb, number_of_ivs * |
| 248 | CIPHER_BLOCK_SIZE); |
| 249 | if (iv_loc) |
| 250 | memcpy(iv_loc, ivs, number_of_ivs * CIPHER_BLOCK_SIZE); |
| 251 | |
| 252 | hws->ivsize = number_of_ivs * CIPHER_BLOCK_SIZE; |
| 253 | } else { |
| 254 | /* Send the IVs as sgls */ |
| 255 | /* Already accounted IV DSGL for credits */ |
| 256 | skb_shinfo(skb)->nr_frags--; |
| 257 | page = alloc_pages(sk->sk_allocation | __GFP_COMP, 0); |
| 258 | if (!page) { |
| 259 | pr_info("%s : Page allocation for IVs failed\n", |
| 260 | __func__); |
| 261 | err = -ENOMEM; |
| 262 | goto out; |
| 263 | } |
| 264 | memcpy(page_address(page), ivs, number_of_ivs * |
| 265 | CIPHER_BLOCK_SIZE); |
| 266 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, 0, |
| 267 | number_of_ivs * CIPHER_BLOCK_SIZE); |
| 268 | hws->ivsize = 0; |
| 269 | } |
| 270 | out: |
| 271 | kfree(ivs); |
| 272 | return err; |
| 273 | } |
| 274 | |
| 275 | /* Copy Key to WR */ |
| 276 | static void tls_copy_tx_key(struct sock *sk, struct sk_buff *skb) |
| 277 | { |
| 278 | struct ulptx_sc_memrd *sc_memrd; |
| 279 | struct chtls_sock *csk; |
| 280 | struct chtls_dev *cdev; |
| 281 | struct ulptx_idata *sc; |
| 282 | struct chtls_hws *hws; |
| 283 | u32 immdlen; |
| 284 | int kaddr; |
| 285 | |
| 286 | csk = rcu_dereference_sk_user_data(sk); |
| 287 | hws = &csk->tlshws; |
| 288 | cdev = csk->cdev; |
| 289 | |
| 290 | immdlen = sizeof(*sc) + sizeof(*sc_memrd); |
| 291 | kaddr = keyid_to_addr(cdev->kmap.start, hws->txkey); |
| 292 | sc = (struct ulptx_idata *)__skb_push(skb, immdlen); |
| 293 | if (sc) { |
| 294 | sc->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_NOOP)); |
| 295 | sc->len = htonl(0); |
| 296 | sc_memrd = (struct ulptx_sc_memrd *)(sc + 1); |
| 297 | sc_memrd->cmd_to_len = |
| 298 | htonl(ULPTX_CMD_V(ULP_TX_SC_MEMRD) | |
| 299 | ULP_TX_SC_MORE_V(1) | |
| 300 | ULPTX_LEN16_V(hws->keylen >> 4)); |
| 301 | sc_memrd->addr = htonl(kaddr); |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | static u64 tlstx_incr_seqnum(struct chtls_hws *hws) |
| 306 | { |
| 307 | return hws->tx_seq_no++; |
| 308 | } |
| 309 | |
| 310 | static bool is_sg_request(const struct sk_buff *skb) |
| 311 | { |
| 312 | return skb->peeked || |
| 313 | (skb->len > MAX_IMM_ULPTX_WR_LEN); |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * Returns true if an sk_buff carries urgent data. |
| 318 | */ |
| 319 | static bool skb_urgent(struct sk_buff *skb) |
| 320 | { |
| 321 | return ULP_SKB_CB(skb)->flags & ULPCB_FLAG_URG; |
| 322 | } |
| 323 | |
| 324 | /* TLS content type for CPL SFO */ |
| 325 | static unsigned char tls_content_type(unsigned char content_type) |
| 326 | { |
| 327 | switch (content_type) { |
| 328 | case TLS_HDR_TYPE_CCS: |
| 329 | return CPL_TX_TLS_SFO_TYPE_CCS; |
| 330 | case TLS_HDR_TYPE_ALERT: |
| 331 | return CPL_TX_TLS_SFO_TYPE_ALERT; |
| 332 | case TLS_HDR_TYPE_HANDSHAKE: |
| 333 | return CPL_TX_TLS_SFO_TYPE_HANDSHAKE; |
| 334 | case TLS_HDR_TYPE_HEARTBEAT: |
| 335 | return CPL_TX_TLS_SFO_TYPE_HEARTBEAT; |
| 336 | } |
| 337 | return CPL_TX_TLS_SFO_TYPE_DATA; |
| 338 | } |
| 339 | |
| 340 | static void tls_tx_data_wr(struct sock *sk, struct sk_buff *skb, |
| 341 | int dlen, int tls_immd, u32 credits, |
| 342 | int expn, int pdus) |
| 343 | { |
| 344 | struct fw_tlstx_data_wr *req_wr; |
| 345 | struct cpl_tx_tls_sfo *req_cpl; |
| 346 | unsigned int wr_ulp_mode_force; |
| 347 | struct tls_scmd *updated_scmd; |
| 348 | unsigned char data_type; |
| 349 | struct chtls_sock *csk; |
| 350 | struct net_device *dev; |
| 351 | struct chtls_hws *hws; |
| 352 | struct tls_scmd *scmd; |
| 353 | struct adapter *adap; |
| 354 | unsigned char *req; |
| 355 | int immd_len; |
| 356 | int iv_imm; |
| 357 | int len; |
| 358 | |
| 359 | csk = rcu_dereference_sk_user_data(sk); |
| 360 | iv_imm = skb_ulp_tls_iv_imm(skb); |
| 361 | dev = csk->egress_dev; |
| 362 | adap = netdev2adap(dev); |
| 363 | hws = &csk->tlshws; |
| 364 | scmd = &hws->scmd; |
| 365 | len = dlen + expn; |
| 366 | |
| 367 | dlen = (dlen < hws->mfs) ? dlen : hws->mfs; |
| 368 | atomic_inc(&adap->chcr_stats.tls_pdu_tx); |
| 369 | |
| 370 | updated_scmd = scmd; |
| 371 | updated_scmd->seqno_numivs &= 0xffffff80; |
| 372 | updated_scmd->seqno_numivs |= SCMD_NUM_IVS_V(pdus); |
| 373 | hws->scmd = *updated_scmd; |
| 374 | |
| 375 | req = (unsigned char *)__skb_push(skb, sizeof(struct cpl_tx_tls_sfo)); |
| 376 | req_cpl = (struct cpl_tx_tls_sfo *)req; |
| 377 | req = (unsigned char *)__skb_push(skb, (sizeof(struct |
| 378 | fw_tlstx_data_wr))); |
| 379 | |
| 380 | req_wr = (struct fw_tlstx_data_wr *)req; |
| 381 | immd_len = (tls_immd ? dlen : 0); |
| 382 | req_wr->op_to_immdlen = |
| 383 | htonl(FW_WR_OP_V(FW_TLSTX_DATA_WR) | |
| 384 | FW_TLSTX_DATA_WR_COMPL_V(1) | |
| 385 | FW_TLSTX_DATA_WR_IMMDLEN_V(immd_len)); |
| 386 | req_wr->flowid_len16 = htonl(FW_TLSTX_DATA_WR_FLOWID_V(csk->tid) | |
| 387 | FW_TLSTX_DATA_WR_LEN16_V(credits)); |
| 388 | wr_ulp_mode_force = TX_ULP_MODE_V(ULP_MODE_TLS); |
| 389 | |
| 390 | if (is_sg_request(skb)) |
| 391 | wr_ulp_mode_force |= FW_OFLD_TX_DATA_WR_ALIGNPLD_F | |
| 392 | ((tcp_sk(sk)->nonagle & TCP_NAGLE_OFF) ? 0 : |
| 393 | FW_OFLD_TX_DATA_WR_SHOVE_F); |
| 394 | |
| 395 | req_wr->lsodisable_to_flags = |
| 396 | htonl(TX_ULP_MODE_V(ULP_MODE_TLS) | |
Atul Gupta | 848dd1c | 2018-12-11 02:20:40 -0800 | [diff] [blame] | 397 | TX_URG_V(skb_urgent(skb)) | |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 398 | T6_TX_FORCE_F | wr_ulp_mode_force | |
| 399 | TX_SHOVE_V((!csk_flag(sk, CSK_TX_MORE_DATA)) && |
| 400 | skb_queue_empty(&csk->txq))); |
| 401 | |
| 402 | req_wr->ctxloc_to_exp = |
| 403 | htonl(FW_TLSTX_DATA_WR_NUMIVS_V(pdus) | |
| 404 | FW_TLSTX_DATA_WR_EXP_V(expn) | |
| 405 | FW_TLSTX_DATA_WR_CTXLOC_V(CHTLS_KEY_CONTEXT_DDR) | |
| 406 | FW_TLSTX_DATA_WR_IVDSGL_V(!iv_imm) | |
| 407 | FW_TLSTX_DATA_WR_KEYSIZE_V(hws->keylen >> 4)); |
| 408 | |
| 409 | /* Fill in the length */ |
| 410 | req_wr->plen = htonl(len); |
| 411 | req_wr->mfs = htons(hws->mfs); |
| 412 | req_wr->adjustedplen_pkd = |
| 413 | htons(FW_TLSTX_DATA_WR_ADJUSTEDPLEN_V(hws->adjustlen)); |
| 414 | req_wr->expinplenmax_pkd = |
| 415 | htons(FW_TLSTX_DATA_WR_EXPINPLENMAX_V(hws->expansion)); |
| 416 | req_wr->pdusinplenmax_pkd = |
| 417 | FW_TLSTX_DATA_WR_PDUSINPLENMAX_V(hws->pdus); |
| 418 | req_wr->r10 = 0; |
| 419 | |
| 420 | data_type = tls_content_type(ULP_SKB_CB(skb)->ulp.tls.type); |
| 421 | req_cpl->op_to_seg_len = htonl(CPL_TX_TLS_SFO_OPCODE_V(CPL_TX_TLS_SFO) | |
| 422 | CPL_TX_TLS_SFO_DATA_TYPE_V(data_type) | |
| 423 | CPL_TX_TLS_SFO_CPL_LEN_V(2) | |
| 424 | CPL_TX_TLS_SFO_SEG_LEN_V(dlen)); |
| 425 | req_cpl->pld_len = htonl(len - expn); |
| 426 | |
| 427 | req_cpl->type_protover = htonl(CPL_TX_TLS_SFO_TYPE_V |
| 428 | ((data_type == CPL_TX_TLS_SFO_TYPE_HEARTBEAT) ? |
| 429 | TLS_HDR_TYPE_HEARTBEAT : 0) | |
| 430 | CPL_TX_TLS_SFO_PROTOVER_V(0)); |
| 431 | |
| 432 | /* create the s-command */ |
| 433 | req_cpl->r1_lo = 0; |
| 434 | req_cpl->seqno_numivs = cpu_to_be32(hws->scmd.seqno_numivs); |
| 435 | req_cpl->ivgen_hdrlen = cpu_to_be32(hws->scmd.ivgen_hdrlen); |
| 436 | req_cpl->scmd1 = cpu_to_be64(tlstx_incr_seqnum(hws)); |
| 437 | } |
| 438 | |
| 439 | /* |
| 440 | * Calculate the TLS data expansion size |
| 441 | */ |
| 442 | static int chtls_expansion_size(struct sock *sk, int data_len, |
| 443 | int fullpdu, |
| 444 | unsigned short *pducnt) |
| 445 | { |
| 446 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 447 | struct chtls_hws *hws = &csk->tlshws; |
| 448 | struct tls_scmd *scmd = &hws->scmd; |
| 449 | int fragsize = hws->mfs; |
| 450 | int expnsize = 0; |
| 451 | int fragleft; |
| 452 | int fragcnt; |
| 453 | int expppdu; |
| 454 | |
| 455 | if (SCMD_CIPH_MODE_G(scmd->seqno_numivs) == |
| 456 | SCMD_CIPH_MODE_AES_GCM) { |
| 457 | expppdu = GCM_TAG_SIZE + AEAD_EXPLICIT_DATA_SIZE + |
| 458 | TLS_HEADER_LENGTH; |
| 459 | |
| 460 | if (fullpdu) { |
| 461 | *pducnt = data_len / (expppdu + fragsize); |
| 462 | if (*pducnt > 32) |
| 463 | *pducnt = 32; |
| 464 | else if (!*pducnt) |
| 465 | *pducnt = 1; |
| 466 | expnsize = (*pducnt) * expppdu; |
| 467 | return expnsize; |
| 468 | } |
| 469 | fragcnt = (data_len / fragsize); |
| 470 | expnsize = fragcnt * expppdu; |
| 471 | fragleft = data_len % fragsize; |
| 472 | if (fragleft > 0) |
| 473 | expnsize += expppdu; |
| 474 | } |
| 475 | return expnsize; |
| 476 | } |
| 477 | |
| 478 | /* WR with IV, KEY and CPL SFO added */ |
| 479 | static void make_tlstx_data_wr(struct sock *sk, struct sk_buff *skb, |
| 480 | int tls_tx_imm, int tls_len, u32 credits) |
| 481 | { |
| 482 | unsigned short pdus_per_ulp = 0; |
| 483 | struct chtls_sock *csk; |
| 484 | struct chtls_hws *hws; |
| 485 | int expn_sz; |
| 486 | int pdus; |
| 487 | |
| 488 | csk = rcu_dereference_sk_user_data(sk); |
| 489 | hws = &csk->tlshws; |
| 490 | pdus = DIV_ROUND_UP(tls_len, hws->mfs); |
| 491 | expn_sz = chtls_expansion_size(sk, tls_len, 0, NULL); |
| 492 | if (!hws->compute) { |
| 493 | hws->expansion = chtls_expansion_size(sk, |
| 494 | hws->fcplenmax, |
| 495 | 1, &pdus_per_ulp); |
| 496 | hws->pdus = pdus_per_ulp; |
| 497 | hws->adjustlen = hws->pdus * |
| 498 | ((hws->expansion / hws->pdus) + hws->mfs); |
| 499 | hws->compute = 1; |
| 500 | } |
| 501 | if (tls_copy_ivs(sk, skb)) |
| 502 | return; |
| 503 | tls_copy_tx_key(sk, skb); |
| 504 | tls_tx_data_wr(sk, skb, tls_len, tls_tx_imm, credits, expn_sz, pdus); |
| 505 | hws->tx_seq_no += (pdus - 1); |
| 506 | } |
| 507 | |
| 508 | static void make_tx_data_wr(struct sock *sk, struct sk_buff *skb, |
| 509 | unsigned int immdlen, int len, |
| 510 | u32 credits, u32 compl) |
| 511 | { |
| 512 | struct fw_ofld_tx_data_wr *req; |
| 513 | unsigned int wr_ulp_mode_force; |
| 514 | struct chtls_sock *csk; |
| 515 | unsigned int opcode; |
| 516 | |
| 517 | csk = rcu_dereference_sk_user_data(sk); |
| 518 | opcode = FW_OFLD_TX_DATA_WR; |
| 519 | |
| 520 | req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); |
| 521 | req->op_to_immdlen = htonl(WR_OP_V(opcode) | |
| 522 | FW_WR_COMPL_V(compl) | |
| 523 | FW_WR_IMMDLEN_V(immdlen)); |
| 524 | req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) | |
| 525 | FW_WR_LEN16_V(credits)); |
| 526 | |
| 527 | wr_ulp_mode_force = TX_ULP_MODE_V(csk->ulp_mode); |
| 528 | if (is_sg_request(skb)) |
| 529 | wr_ulp_mode_force |= FW_OFLD_TX_DATA_WR_ALIGNPLD_F | |
| 530 | ((tcp_sk(sk)->nonagle & TCP_NAGLE_OFF) ? 0 : |
| 531 | FW_OFLD_TX_DATA_WR_SHOVE_F); |
| 532 | |
| 533 | req->tunnel_to_proxy = htonl(wr_ulp_mode_force | |
Atul Gupta | 848dd1c | 2018-12-11 02:20:40 -0800 | [diff] [blame] | 534 | TX_URG_V(skb_urgent(skb)) | |
| 535 | TX_SHOVE_V((!csk_flag(sk, CSK_TX_MORE_DATA)) && |
| 536 | skb_queue_empty(&csk->txq))); |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 537 | req->plen = htonl(len); |
| 538 | } |
| 539 | |
| 540 | static int chtls_wr_size(struct chtls_sock *csk, const struct sk_buff *skb, |
| 541 | bool size) |
| 542 | { |
| 543 | int wr_size; |
| 544 | |
| 545 | wr_size = TLS_WR_CPL_LEN; |
| 546 | wr_size += KEY_ON_MEM_SZ; |
| 547 | wr_size += ivs_size(csk->sk, skb); |
| 548 | |
| 549 | if (size) |
| 550 | return wr_size; |
| 551 | |
| 552 | /* frags counted for IV dsgl */ |
| 553 | if (!skb_ulp_tls_iv_imm(skb)) |
| 554 | skb_shinfo(skb)->nr_frags++; |
| 555 | |
| 556 | return wr_size; |
| 557 | } |
| 558 | |
| 559 | static bool is_ofld_imm(struct chtls_sock *csk, const struct sk_buff *skb) |
| 560 | { |
| 561 | int length = skb->len; |
| 562 | |
| 563 | if (skb->peeked || skb->len > MAX_IMM_ULPTX_WR_LEN) |
| 564 | return false; |
| 565 | |
| 566 | if (likely(ULP_SKB_CB(skb)->flags & ULPCB_FLAG_NEED_HDR)) { |
| 567 | /* Check TLS header len for Immediate */ |
| 568 | if (csk->ulp_mode == ULP_MODE_TLS && |
| 569 | skb_ulp_tls_inline(skb)) |
| 570 | length += chtls_wr_size(csk, skb, true); |
| 571 | else |
| 572 | length += sizeof(struct fw_ofld_tx_data_wr); |
| 573 | |
| 574 | return length <= MAX_IMM_OFLD_TX_DATA_WR_LEN; |
| 575 | } |
| 576 | return true; |
| 577 | } |
| 578 | |
| 579 | static unsigned int calc_tx_flits(const struct sk_buff *skb, |
| 580 | unsigned int immdlen) |
| 581 | { |
| 582 | unsigned int flits, cnt; |
| 583 | |
| 584 | flits = immdlen / 8; /* headers */ |
| 585 | cnt = skb_shinfo(skb)->nr_frags; |
| 586 | if (skb_tail_pointer(skb) != skb_transport_header(skb)) |
| 587 | cnt++; |
| 588 | return flits + sgl_len(cnt); |
| 589 | } |
| 590 | |
| 591 | static void arp_failure_discard(void *handle, struct sk_buff *skb) |
| 592 | { |
| 593 | kfree_skb(skb); |
| 594 | } |
| 595 | |
| 596 | int chtls_push_frames(struct chtls_sock *csk, int comp) |
| 597 | { |
| 598 | struct chtls_hws *hws = &csk->tlshws; |
| 599 | struct tcp_sock *tp; |
| 600 | struct sk_buff *skb; |
| 601 | int total_size = 0; |
| 602 | struct sock *sk; |
| 603 | int wr_size; |
| 604 | |
| 605 | wr_size = sizeof(struct fw_ofld_tx_data_wr); |
| 606 | sk = csk->sk; |
| 607 | tp = tcp_sk(sk); |
| 608 | |
| 609 | if (unlikely(sk_in_state(sk, TCPF_SYN_SENT | TCPF_CLOSE))) |
| 610 | return 0; |
| 611 | |
| 612 | if (unlikely(csk_flag(sk, CSK_ABORT_SHUTDOWN))) |
| 613 | return 0; |
| 614 | |
| 615 | while (csk->wr_credits && (skb = skb_peek(&csk->txq)) && |
| 616 | (!(ULP_SKB_CB(skb)->flags & ULPCB_FLAG_HOLD) || |
| 617 | skb_queue_len(&csk->txq) > 1)) { |
| 618 | unsigned int credit_len = skb->len; |
| 619 | unsigned int credits_needed; |
| 620 | unsigned int completion = 0; |
| 621 | int tls_len = skb->len;/* TLS data len before IV/key */ |
| 622 | unsigned int immdlen; |
| 623 | int len = skb->len; /* length [ulp bytes] inserted by hw */ |
| 624 | int flowclen16 = 0; |
| 625 | int tls_tx_imm = 0; |
| 626 | |
| 627 | immdlen = skb->len; |
| 628 | if (!is_ofld_imm(csk, skb)) { |
| 629 | immdlen = skb_transport_offset(skb); |
| 630 | if (skb_ulp_tls_inline(skb)) |
| 631 | wr_size = chtls_wr_size(csk, skb, false); |
| 632 | credit_len = 8 * calc_tx_flits(skb, immdlen); |
| 633 | } else { |
| 634 | if (skb_ulp_tls_inline(skb)) { |
| 635 | wr_size = chtls_wr_size(csk, skb, false); |
| 636 | tls_tx_imm = 1; |
| 637 | } |
| 638 | } |
| 639 | if (likely(ULP_SKB_CB(skb)->flags & ULPCB_FLAG_NEED_HDR)) |
| 640 | credit_len += wr_size; |
| 641 | credits_needed = DIV_ROUND_UP(credit_len, 16); |
| 642 | if (!csk_flag_nochk(csk, CSK_TX_DATA_SENT)) { |
| 643 | flowclen16 = send_tx_flowc_wr(sk, 1, tp->snd_nxt, |
| 644 | tp->rcv_nxt); |
| 645 | if (flowclen16 <= 0) |
| 646 | break; |
| 647 | csk->wr_credits -= flowclen16; |
| 648 | csk->wr_unacked += flowclen16; |
| 649 | csk->wr_nondata += flowclen16; |
| 650 | csk_set_flag(csk, CSK_TX_DATA_SENT); |
| 651 | } |
| 652 | |
| 653 | if (csk->wr_credits < credits_needed) { |
| 654 | if (skb_ulp_tls_inline(skb) && |
| 655 | !skb_ulp_tls_iv_imm(skb)) |
| 656 | skb_shinfo(skb)->nr_frags--; |
| 657 | break; |
| 658 | } |
| 659 | |
| 660 | __skb_unlink(skb, &csk->txq); |
| 661 | skb_set_queue_mapping(skb, (csk->txq_idx << 1) | |
| 662 | CPL_PRIORITY_DATA); |
| 663 | if (hws->ofld) |
| 664 | hws->txqid = (skb->queue_mapping >> 1); |
| 665 | skb->csum = (__force __wsum)(credits_needed + csk->wr_nondata); |
| 666 | csk->wr_credits -= credits_needed; |
| 667 | csk->wr_unacked += credits_needed; |
| 668 | csk->wr_nondata = 0; |
| 669 | enqueue_wr(csk, skb); |
| 670 | |
| 671 | if (likely(ULP_SKB_CB(skb)->flags & ULPCB_FLAG_NEED_HDR)) { |
| 672 | if ((comp && csk->wr_unacked == credits_needed) || |
| 673 | (ULP_SKB_CB(skb)->flags & ULPCB_FLAG_COMPL) || |
| 674 | csk->wr_unacked >= csk->wr_max_credits / 2) { |
| 675 | completion = 1; |
| 676 | csk->wr_unacked = 0; |
| 677 | } |
| 678 | if (skb_ulp_tls_inline(skb)) |
| 679 | make_tlstx_data_wr(sk, skb, tls_tx_imm, |
| 680 | tls_len, credits_needed); |
| 681 | else |
| 682 | make_tx_data_wr(sk, skb, immdlen, len, |
| 683 | credits_needed, completion); |
| 684 | tp->snd_nxt += len; |
| 685 | tp->lsndtime = tcp_time_stamp(tp); |
| 686 | if (completion) |
| 687 | ULP_SKB_CB(skb)->flags &= ~ULPCB_FLAG_NEED_HDR; |
| 688 | } else { |
| 689 | struct cpl_close_con_req *req = cplhdr(skb); |
| 690 | unsigned int cmd = CPL_OPCODE_G(ntohl |
| 691 | (OPCODE_TID(req))); |
| 692 | |
| 693 | if (cmd == CPL_CLOSE_CON_REQ) |
| 694 | csk_set_flag(csk, |
| 695 | CSK_CLOSE_CON_REQUESTED); |
| 696 | |
| 697 | if ((ULP_SKB_CB(skb)->flags & ULPCB_FLAG_COMPL) && |
| 698 | (csk->wr_unacked >= csk->wr_max_credits / 2)) { |
| 699 | req->wr.wr_hi |= htonl(FW_WR_COMPL_F); |
| 700 | csk->wr_unacked = 0; |
| 701 | } |
| 702 | } |
| 703 | total_size += skb->truesize; |
| 704 | if (ULP_SKB_CB(skb)->flags & ULPCB_FLAG_BARRIER) |
| 705 | csk_set_flag(csk, CSK_TX_WAIT_IDLE); |
| 706 | t4_set_arp_err_handler(skb, NULL, arp_failure_discard); |
| 707 | cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry); |
| 708 | } |
| 709 | sk->sk_wmem_queued -= total_size; |
| 710 | return total_size; |
| 711 | } |
| 712 | |
| 713 | static void mark_urg(struct tcp_sock *tp, int flags, |
| 714 | struct sk_buff *skb) |
| 715 | { |
| 716 | if (unlikely(flags & MSG_OOB)) { |
| 717 | tp->snd_up = tp->write_seq; |
| 718 | ULP_SKB_CB(skb)->flags = ULPCB_FLAG_URG | |
| 719 | ULPCB_FLAG_BARRIER | |
| 720 | ULPCB_FLAG_NO_APPEND | |
| 721 | ULPCB_FLAG_NEED_HDR; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | /* |
| 726 | * Returns true if a connection should send more data to TCP engine |
| 727 | */ |
| 728 | static bool should_push(struct sock *sk) |
| 729 | { |
| 730 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 731 | struct chtls_dev *cdev = csk->cdev; |
| 732 | struct tcp_sock *tp = tcp_sk(sk); |
| 733 | |
| 734 | /* |
| 735 | * If we've released our offload resources there's nothing to do ... |
| 736 | */ |
| 737 | if (!cdev) |
| 738 | return false; |
| 739 | |
| 740 | /* |
| 741 | * If there aren't any work requests in flight, or there isn't enough |
| 742 | * data in flight, or Nagle is off then send the current TX_DATA |
| 743 | * otherwise hold it and wait to accumulate more data. |
| 744 | */ |
| 745 | return csk->wr_credits == csk->wr_max_credits || |
| 746 | (tp->nonagle & TCP_NAGLE_OFF); |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | * Returns true if a TCP socket is corked. |
| 751 | */ |
| 752 | static bool corked(const struct tcp_sock *tp, int flags) |
| 753 | { |
| 754 | return (flags & MSG_MORE) || (tp->nonagle & TCP_NAGLE_CORK); |
| 755 | } |
| 756 | |
| 757 | /* |
| 758 | * Returns true if a send should try to push new data. |
| 759 | */ |
| 760 | static bool send_should_push(struct sock *sk, int flags) |
| 761 | { |
| 762 | return should_push(sk) && !corked(tcp_sk(sk), flags); |
| 763 | } |
| 764 | |
| 765 | void chtls_tcp_push(struct sock *sk, int flags) |
| 766 | { |
| 767 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 768 | int qlen = skb_queue_len(&csk->txq); |
| 769 | |
| 770 | if (likely(qlen)) { |
| 771 | struct sk_buff *skb = skb_peek_tail(&csk->txq); |
| 772 | struct tcp_sock *tp = tcp_sk(sk); |
| 773 | |
| 774 | mark_urg(tp, flags, skb); |
| 775 | |
| 776 | if (!(ULP_SKB_CB(skb)->flags & ULPCB_FLAG_NO_APPEND) && |
| 777 | corked(tp, flags)) { |
| 778 | ULP_SKB_CB(skb)->flags |= ULPCB_FLAG_HOLD; |
| 779 | return; |
| 780 | } |
| 781 | |
| 782 | ULP_SKB_CB(skb)->flags &= ~ULPCB_FLAG_HOLD; |
| 783 | if (qlen == 1 && |
| 784 | ((ULP_SKB_CB(skb)->flags & ULPCB_FLAG_NO_APPEND) || |
| 785 | should_push(sk))) |
| 786 | chtls_push_frames(csk, 1); |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | /* |
| 791 | * Calculate the size for a new send sk_buff. It's maximum size so we can |
| 792 | * pack lots of data into it, unless we plan to send it immediately, in which |
| 793 | * case we size it more tightly. |
| 794 | * |
| 795 | * Note: we don't bother compensating for MSS < PAGE_SIZE because it doesn't |
| 796 | * arise in normal cases and when it does we are just wasting memory. |
| 797 | */ |
| 798 | static int select_size(struct sock *sk, int io_len, int flags, int len) |
| 799 | { |
| 800 | const int pgbreak = SKB_MAX_HEAD(len); |
| 801 | |
| 802 | /* |
| 803 | * If the data wouldn't fit in the main body anyway, put only the |
| 804 | * header in the main body so it can use immediate data and place all |
| 805 | * the payload in page fragments. |
| 806 | */ |
| 807 | if (io_len > pgbreak) |
| 808 | return 0; |
| 809 | |
| 810 | /* |
| 811 | * If we will be accumulating payload get a large main body. |
| 812 | */ |
| 813 | if (!send_should_push(sk, flags)) |
| 814 | return pgbreak; |
| 815 | |
| 816 | return io_len; |
| 817 | } |
| 818 | |
| 819 | void skb_entail(struct sock *sk, struct sk_buff *skb, int flags) |
| 820 | { |
| 821 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 822 | struct tcp_sock *tp = tcp_sk(sk); |
| 823 | |
| 824 | ULP_SKB_CB(skb)->seq = tp->write_seq; |
| 825 | ULP_SKB_CB(skb)->flags = flags; |
| 826 | __skb_queue_tail(&csk->txq, skb); |
| 827 | sk->sk_wmem_queued += skb->truesize; |
| 828 | |
| 829 | if (TCP_PAGE(sk) && TCP_OFF(sk)) { |
| 830 | put_page(TCP_PAGE(sk)); |
| 831 | TCP_PAGE(sk) = NULL; |
| 832 | TCP_OFF(sk) = 0; |
| 833 | } |
| 834 | } |
| 835 | |
| 836 | static struct sk_buff *get_tx_skb(struct sock *sk, int size) |
| 837 | { |
| 838 | struct sk_buff *skb; |
| 839 | |
| 840 | skb = alloc_skb(size + TX_HEADER_LEN, sk->sk_allocation); |
| 841 | if (likely(skb)) { |
| 842 | skb_reserve(skb, TX_HEADER_LEN); |
| 843 | skb_entail(sk, skb, ULPCB_FLAG_NEED_HDR); |
| 844 | skb_reset_transport_header(skb); |
| 845 | } |
| 846 | return skb; |
| 847 | } |
| 848 | |
| 849 | static struct sk_buff *get_record_skb(struct sock *sk, int size, bool zcopy) |
| 850 | { |
| 851 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 852 | struct sk_buff *skb; |
| 853 | |
| 854 | skb = alloc_skb(((zcopy ? 0 : size) + TX_TLSHDR_LEN + |
| 855 | KEY_ON_MEM_SZ + max_ivs_size(sk, size)), |
| 856 | sk->sk_allocation); |
| 857 | if (likely(skb)) { |
| 858 | skb_reserve(skb, (TX_TLSHDR_LEN + |
| 859 | KEY_ON_MEM_SZ + max_ivs_size(sk, size))); |
| 860 | skb_entail(sk, skb, ULPCB_FLAG_NEED_HDR); |
| 861 | skb_reset_transport_header(skb); |
| 862 | ULP_SKB_CB(skb)->ulp.tls.ofld = 1; |
| 863 | ULP_SKB_CB(skb)->ulp.tls.type = csk->tlshws.type; |
| 864 | } |
| 865 | return skb; |
| 866 | } |
| 867 | |
| 868 | static void tx_skb_finalize(struct sk_buff *skb) |
| 869 | { |
| 870 | struct ulp_skb_cb *cb = ULP_SKB_CB(skb); |
| 871 | |
| 872 | if (!(cb->flags & ULPCB_FLAG_NO_HDR)) |
| 873 | cb->flags = ULPCB_FLAG_NEED_HDR; |
| 874 | cb->flags |= ULPCB_FLAG_NO_APPEND; |
| 875 | } |
| 876 | |
| 877 | static void push_frames_if_head(struct sock *sk) |
| 878 | { |
| 879 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 880 | |
| 881 | if (skb_queue_len(&csk->txq) == 1) |
| 882 | chtls_push_frames(csk, 1); |
| 883 | } |
| 884 | |
| 885 | static int chtls_skb_copy_to_page_nocache(struct sock *sk, |
| 886 | struct iov_iter *from, |
| 887 | struct sk_buff *skb, |
| 888 | struct page *page, |
| 889 | int off, int copy) |
| 890 | { |
| 891 | int err; |
| 892 | |
| 893 | err = skb_do_copy_data_nocache(sk, skb, from, page_address(page) + |
| 894 | off, copy, skb->len); |
| 895 | if (err) |
| 896 | return err; |
| 897 | |
| 898 | skb->len += copy; |
| 899 | skb->data_len += copy; |
| 900 | skb->truesize += copy; |
| 901 | sk->sk_wmem_queued += copy; |
| 902 | return 0; |
| 903 | } |
| 904 | |
| 905 | /* Read TLS header to find content type and data length */ |
Atul Gupta | 1dfe57a | 2018-05-27 21:15:21 +0530 | [diff] [blame] | 906 | static int tls_header_read(struct tls_hdr *thdr, struct iov_iter *from) |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 907 | { |
| 908 | if (copy_from_iter(thdr, sizeof(*thdr), from) != sizeof(*thdr)) |
| 909 | return -EFAULT; |
Atul Gupta | 1dfe57a | 2018-05-27 21:15:21 +0530 | [diff] [blame] | 910 | return (__force int)cpu_to_be16(thdr->length); |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 911 | } |
| 912 | |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 913 | static int csk_mem_free(struct chtls_dev *cdev, struct sock *sk) |
| 914 | { |
| 915 | return (cdev->max_host_sndbuf - sk->sk_wmem_queued); |
| 916 | } |
| 917 | |
| 918 | static int csk_wait_memory(struct chtls_dev *cdev, |
| 919 | struct sock *sk, long *timeo_p) |
| 920 | { |
| 921 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
YueHaibing | 8d555c5 | 2018-12-18 02:26:14 +0000 | [diff] [blame] | 922 | int err = 0; |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 923 | long current_timeo; |
| 924 | long vm_wait = 0; |
| 925 | bool noblock; |
| 926 | |
| 927 | current_timeo = *timeo_p; |
| 928 | noblock = (*timeo_p ? false : true); |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 929 | if (csk_mem_free(cdev, sk)) { |
| 930 | current_timeo = (prandom_u32() % (HZ / 5)) + 2; |
| 931 | vm_wait = (prandom_u32() % (HZ / 5)) + 2; |
| 932 | } |
| 933 | |
| 934 | add_wait_queue(sk_sleep(sk), &wait); |
| 935 | while (1) { |
| 936 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
| 937 | |
| 938 | if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN)) |
| 939 | goto do_error; |
| 940 | if (!*timeo_p) { |
| 941 | if (noblock) |
| 942 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
| 943 | goto do_nonblock; |
| 944 | } |
| 945 | if (signal_pending(current)) |
| 946 | goto do_interrupted; |
| 947 | sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
| 948 | if (csk_mem_free(cdev, sk) && !vm_wait) |
| 949 | break; |
| 950 | |
| 951 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
| 952 | sk->sk_write_pending++; |
| 953 | sk_wait_event(sk, ¤t_timeo, sk->sk_err || |
| 954 | (sk->sk_shutdown & SEND_SHUTDOWN) || |
| 955 | (csk_mem_free(cdev, sk) && !vm_wait), &wait); |
| 956 | sk->sk_write_pending--; |
| 957 | |
| 958 | if (vm_wait) { |
| 959 | vm_wait -= current_timeo; |
| 960 | current_timeo = *timeo_p; |
| 961 | if (current_timeo != MAX_SCHEDULE_TIMEOUT) { |
| 962 | current_timeo -= vm_wait; |
| 963 | if (current_timeo < 0) |
| 964 | current_timeo = 0; |
| 965 | } |
| 966 | vm_wait = 0; |
| 967 | } |
| 968 | *timeo_p = current_timeo; |
| 969 | } |
| 970 | do_rm_wq: |
| 971 | remove_wait_queue(sk_sleep(sk), &wait); |
| 972 | return err; |
| 973 | do_error: |
| 974 | err = -EPIPE; |
| 975 | goto do_rm_wq; |
| 976 | do_nonblock: |
| 977 | err = -EAGAIN; |
| 978 | goto do_rm_wq; |
| 979 | do_interrupted: |
| 980 | err = sock_intr_errno(*timeo_p); |
| 981 | goto do_rm_wq; |
| 982 | } |
| 983 | |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 984 | int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) |
| 985 | { |
| 986 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 987 | struct chtls_dev *cdev = csk->cdev; |
| 988 | struct tcp_sock *tp = tcp_sk(sk); |
| 989 | struct sk_buff *skb; |
| 990 | int mss, flags, err; |
| 991 | int recordsz = 0; |
| 992 | int copied = 0; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 993 | long timeo; |
| 994 | |
| 995 | lock_sock(sk); |
| 996 | flags = msg->msg_flags; |
| 997 | timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
| 998 | |
| 999 | if (!sk_in_state(sk, TCPF_ESTABLISHED | TCPF_CLOSE_WAIT)) { |
| 1000 | err = sk_stream_wait_connect(sk, &timeo); |
| 1001 | if (err) |
| 1002 | goto out_err; |
| 1003 | } |
| 1004 | |
| 1005 | sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
| 1006 | err = -EPIPE; |
| 1007 | if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN)) |
| 1008 | goto out_err; |
| 1009 | |
| 1010 | mss = csk->mss; |
| 1011 | csk_set_flag(csk, CSK_TX_MORE_DATA); |
| 1012 | |
| 1013 | while (msg_data_left(msg)) { |
| 1014 | int copy = 0; |
| 1015 | |
| 1016 | skb = skb_peek_tail(&csk->txq); |
| 1017 | if (skb) { |
| 1018 | copy = mss - skb->len; |
| 1019 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1020 | } |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 1021 | if (!csk_mem_free(cdev, sk)) |
| 1022 | goto wait_for_sndbuf; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1023 | |
| 1024 | if (is_tls_tx(csk) && !csk->tlshws.txleft) { |
| 1025 | struct tls_hdr hdr; |
| 1026 | |
| 1027 | recordsz = tls_header_read(&hdr, &msg->msg_iter); |
| 1028 | size -= TLS_HEADER_LENGTH; |
Atul Gupta | 848dd1c | 2018-12-11 02:20:40 -0800 | [diff] [blame] | 1029 | copied += TLS_HEADER_LENGTH; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1030 | csk->tlshws.txleft = recordsz; |
| 1031 | csk->tlshws.type = hdr.type; |
| 1032 | if (skb) |
| 1033 | ULP_SKB_CB(skb)->ulp.tls.type = hdr.type; |
| 1034 | } |
| 1035 | |
| 1036 | if (!skb || (ULP_SKB_CB(skb)->flags & ULPCB_FLAG_NO_APPEND) || |
| 1037 | copy <= 0) { |
| 1038 | new_buf: |
| 1039 | if (skb) { |
| 1040 | tx_skb_finalize(skb); |
| 1041 | push_frames_if_head(sk); |
| 1042 | } |
| 1043 | |
| 1044 | if (is_tls_tx(csk)) { |
| 1045 | skb = get_record_skb(sk, |
| 1046 | select_size(sk, |
| 1047 | recordsz, |
| 1048 | flags, |
| 1049 | TX_TLSHDR_LEN), |
| 1050 | false); |
| 1051 | } else { |
| 1052 | skb = get_tx_skb(sk, |
| 1053 | select_size(sk, size, flags, |
| 1054 | TX_HEADER_LEN)); |
| 1055 | } |
| 1056 | if (unlikely(!skb)) |
| 1057 | goto wait_for_memory; |
| 1058 | |
| 1059 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1060 | copy = mss; |
| 1061 | } |
| 1062 | if (copy > size) |
| 1063 | copy = size; |
| 1064 | |
| 1065 | if (skb_tailroom(skb) > 0) { |
| 1066 | copy = min(copy, skb_tailroom(skb)); |
| 1067 | if (is_tls_tx(csk)) |
| 1068 | copy = min_t(int, copy, csk->tlshws.txleft); |
| 1069 | err = skb_add_data_nocache(sk, skb, |
| 1070 | &msg->msg_iter, copy); |
| 1071 | if (err) |
| 1072 | goto do_fault; |
| 1073 | } else { |
| 1074 | int i = skb_shinfo(skb)->nr_frags; |
| 1075 | struct page *page = TCP_PAGE(sk); |
| 1076 | int pg_size = PAGE_SIZE; |
| 1077 | int off = TCP_OFF(sk); |
| 1078 | bool merge; |
| 1079 | |
Atul Gupta | 848dd1c | 2018-12-11 02:20:40 -0800 | [diff] [blame] | 1080 | if (page) |
| 1081 | pg_size <<= compound_order(page); |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1082 | if (off < pg_size && |
| 1083 | skb_can_coalesce(skb, i, page, off)) { |
| 1084 | merge = 1; |
| 1085 | goto copy; |
| 1086 | } |
| 1087 | merge = 0; |
| 1088 | if (i == (is_tls_tx(csk) ? (MAX_SKB_FRAGS - 1) : |
| 1089 | MAX_SKB_FRAGS)) |
| 1090 | goto new_buf; |
| 1091 | |
| 1092 | if (page && off == pg_size) { |
| 1093 | put_page(page); |
| 1094 | TCP_PAGE(sk) = page = NULL; |
| 1095 | pg_size = PAGE_SIZE; |
| 1096 | } |
| 1097 | |
| 1098 | if (!page) { |
| 1099 | gfp_t gfp = sk->sk_allocation; |
| 1100 | int order = cdev->send_page_order; |
| 1101 | |
| 1102 | if (order) { |
| 1103 | page = alloc_pages(gfp | __GFP_COMP | |
| 1104 | __GFP_NOWARN | |
| 1105 | __GFP_NORETRY, |
| 1106 | order); |
| 1107 | if (page) |
| 1108 | pg_size <<= |
| 1109 | compound_order(page); |
| 1110 | } |
| 1111 | if (!page) { |
| 1112 | page = alloc_page(gfp); |
| 1113 | pg_size = PAGE_SIZE; |
| 1114 | } |
| 1115 | if (!page) |
| 1116 | goto wait_for_memory; |
| 1117 | off = 0; |
| 1118 | } |
| 1119 | copy: |
| 1120 | if (copy > pg_size - off) |
| 1121 | copy = pg_size - off; |
| 1122 | if (is_tls_tx(csk)) |
| 1123 | copy = min_t(int, copy, csk->tlshws.txleft); |
| 1124 | |
| 1125 | err = chtls_skb_copy_to_page_nocache(sk, &msg->msg_iter, |
| 1126 | skb, page, |
| 1127 | off, copy); |
| 1128 | if (unlikely(err)) { |
| 1129 | if (!TCP_PAGE(sk)) { |
| 1130 | TCP_PAGE(sk) = page; |
| 1131 | TCP_OFF(sk) = 0; |
| 1132 | } |
| 1133 | goto do_fault; |
| 1134 | } |
| 1135 | /* Update the skb. */ |
| 1136 | if (merge) { |
| 1137 | skb_shinfo(skb)->frags[i - 1].size += copy; |
| 1138 | } else { |
| 1139 | skb_fill_page_desc(skb, i, page, off, copy); |
| 1140 | if (off + copy < pg_size) { |
| 1141 | /* space left keep page */ |
| 1142 | get_page(page); |
| 1143 | TCP_PAGE(sk) = page; |
| 1144 | } else { |
| 1145 | TCP_PAGE(sk) = NULL; |
| 1146 | } |
| 1147 | } |
| 1148 | TCP_OFF(sk) = off + copy; |
| 1149 | } |
| 1150 | if (unlikely(skb->len == mss)) |
| 1151 | tx_skb_finalize(skb); |
| 1152 | tp->write_seq += copy; |
| 1153 | copied += copy; |
| 1154 | size -= copy; |
| 1155 | |
| 1156 | if (is_tls_tx(csk)) |
| 1157 | csk->tlshws.txleft -= copy; |
| 1158 | |
| 1159 | if (corked(tp, flags) && |
| 1160 | (sk_stream_wspace(sk) < sk_stream_min_wspace(sk))) |
| 1161 | ULP_SKB_CB(skb)->flags |= ULPCB_FLAG_NO_APPEND; |
| 1162 | |
| 1163 | if (size == 0) |
| 1164 | goto out; |
| 1165 | |
| 1166 | if (ULP_SKB_CB(skb)->flags & ULPCB_FLAG_NO_APPEND) |
| 1167 | push_frames_if_head(sk); |
| 1168 | continue; |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 1169 | wait_for_sndbuf: |
| 1170 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1171 | wait_for_memory: |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 1172 | err = csk_wait_memory(cdev, sk, &timeo); |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1173 | if (err) |
| 1174 | goto do_error; |
| 1175 | } |
| 1176 | out: |
| 1177 | csk_reset_flag(csk, CSK_TX_MORE_DATA); |
| 1178 | if (copied) |
| 1179 | chtls_tcp_push(sk, flags); |
| 1180 | done: |
| 1181 | release_sock(sk); |
Atul Gupta | 848dd1c | 2018-12-11 02:20:40 -0800 | [diff] [blame] | 1182 | return copied; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1183 | do_fault: |
| 1184 | if (!skb->len) { |
| 1185 | __skb_unlink(skb, &csk->txq); |
| 1186 | sk->sk_wmem_queued -= skb->truesize; |
| 1187 | __kfree_skb(skb); |
| 1188 | } |
| 1189 | do_error: |
| 1190 | if (copied) |
| 1191 | goto out; |
| 1192 | out_err: |
| 1193 | if (csk_conn_inline(csk)) |
| 1194 | csk_reset_flag(csk, CSK_TX_MORE_DATA); |
| 1195 | copied = sk_stream_error(sk, flags, err); |
| 1196 | goto done; |
| 1197 | } |
| 1198 | |
| 1199 | int chtls_sendpage(struct sock *sk, struct page *page, |
| 1200 | int offset, size_t size, int flags) |
| 1201 | { |
| 1202 | struct chtls_sock *csk; |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 1203 | struct chtls_dev *cdev; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1204 | int mss, err, copied; |
| 1205 | struct tcp_sock *tp; |
| 1206 | long timeo; |
| 1207 | |
| 1208 | tp = tcp_sk(sk); |
| 1209 | copied = 0; |
| 1210 | csk = rcu_dereference_sk_user_data(sk); |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 1211 | cdev = csk->cdev; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1212 | timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
| 1213 | |
| 1214 | err = sk_stream_wait_connect(sk, &timeo); |
| 1215 | if (!sk_in_state(sk, TCPF_ESTABLISHED | TCPF_CLOSE_WAIT) && |
| 1216 | err != 0) |
| 1217 | goto out_err; |
| 1218 | |
| 1219 | mss = csk->mss; |
| 1220 | csk_set_flag(csk, CSK_TX_MORE_DATA); |
| 1221 | |
| 1222 | while (size > 0) { |
| 1223 | struct sk_buff *skb = skb_peek_tail(&csk->txq); |
| 1224 | int copy, i; |
| 1225 | |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1226 | if (!skb || (ULP_SKB_CB(skb)->flags & ULPCB_FLAG_NO_APPEND) || |
Atul Gupta | ea5213b | 2018-05-27 21:15:20 +0530 | [diff] [blame] | 1227 | (copy = mss - skb->len) <= 0) { |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1228 | new_buf: |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 1229 | if (!csk_mem_free(cdev, sk)) |
| 1230 | goto wait_for_sndbuf; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1231 | |
| 1232 | if (is_tls_tx(csk)) { |
| 1233 | skb = get_record_skb(sk, |
| 1234 | select_size(sk, size, |
| 1235 | flags, |
| 1236 | TX_TLSHDR_LEN), |
| 1237 | true); |
| 1238 | } else { |
| 1239 | skb = get_tx_skb(sk, 0); |
| 1240 | } |
| 1241 | if (!skb) |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 1242 | goto wait_for_memory; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1243 | copy = mss; |
| 1244 | } |
| 1245 | if (copy > size) |
| 1246 | copy = size; |
| 1247 | |
| 1248 | i = skb_shinfo(skb)->nr_frags; |
| 1249 | if (skb_can_coalesce(skb, i, page, offset)) { |
| 1250 | skb_shinfo(skb)->frags[i - 1].size += copy; |
| 1251 | } else if (i < MAX_SKB_FRAGS) { |
| 1252 | get_page(page); |
| 1253 | skb_fill_page_desc(skb, i, page, offset, copy); |
| 1254 | } else { |
| 1255 | tx_skb_finalize(skb); |
| 1256 | push_frames_if_head(sk); |
| 1257 | goto new_buf; |
| 1258 | } |
| 1259 | |
| 1260 | skb->len += copy; |
| 1261 | if (skb->len == mss) |
| 1262 | tx_skb_finalize(skb); |
| 1263 | skb->data_len += copy; |
| 1264 | skb->truesize += copy; |
| 1265 | sk->sk_wmem_queued += copy; |
| 1266 | tp->write_seq += copy; |
| 1267 | copied += copy; |
| 1268 | offset += copy; |
| 1269 | size -= copy; |
| 1270 | |
| 1271 | if (corked(tp, flags) && |
| 1272 | (sk_stream_wspace(sk) < sk_stream_min_wspace(sk))) |
| 1273 | ULP_SKB_CB(skb)->flags |= ULPCB_FLAG_NO_APPEND; |
| 1274 | |
| 1275 | if (!size) |
| 1276 | break; |
| 1277 | |
| 1278 | if (unlikely(ULP_SKB_CB(skb)->flags & ULPCB_FLAG_NO_APPEND)) |
| 1279 | push_frames_if_head(sk); |
| 1280 | continue; |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 1281 | wait_for_sndbuf: |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1282 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
Atul Gupta | 3b8305f | 2018-05-27 21:15:19 +0530 | [diff] [blame] | 1283 | wait_for_memory: |
| 1284 | err = csk_wait_memory(cdev, sk, &timeo); |
| 1285 | if (err) |
| 1286 | goto do_error; |
Atul Gupta | 36bedb3 | 2018-03-31 21:42:00 +0530 | [diff] [blame] | 1287 | } |
| 1288 | out: |
| 1289 | csk_reset_flag(csk, CSK_TX_MORE_DATA); |
| 1290 | if (copied) |
| 1291 | chtls_tcp_push(sk, flags); |
| 1292 | done: |
| 1293 | release_sock(sk); |
| 1294 | return copied; |
| 1295 | |
| 1296 | do_error: |
| 1297 | if (copied) |
| 1298 | goto out; |
| 1299 | |
| 1300 | out_err: |
| 1301 | if (csk_conn_inline(csk)) |
| 1302 | csk_reset_flag(csk, CSK_TX_MORE_DATA); |
| 1303 | copied = sk_stream_error(sk, flags, err); |
| 1304 | goto done; |
| 1305 | } |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1306 | |
| 1307 | static void chtls_select_window(struct sock *sk) |
| 1308 | { |
| 1309 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 1310 | struct tcp_sock *tp = tcp_sk(sk); |
| 1311 | unsigned int wnd = tp->rcv_wnd; |
| 1312 | |
| 1313 | wnd = max_t(unsigned int, wnd, tcp_full_space(sk)); |
| 1314 | wnd = max_t(unsigned int, MIN_RCV_WND, wnd); |
| 1315 | |
| 1316 | if (wnd > MAX_RCV_WND) |
| 1317 | wnd = MAX_RCV_WND; |
| 1318 | |
| 1319 | /* |
| 1320 | * Check if we need to grow the receive window in response to an increase in |
| 1321 | * the socket's receive buffer size. Some applications increase the buffer |
| 1322 | * size dynamically and rely on the window to grow accordingly. |
| 1323 | */ |
| 1324 | |
| 1325 | if (wnd > tp->rcv_wnd) { |
| 1326 | tp->rcv_wup -= wnd - tp->rcv_wnd; |
| 1327 | tp->rcv_wnd = wnd; |
| 1328 | /* Mark the receive window as updated */ |
| 1329 | csk_reset_flag(csk, CSK_UPDATE_RCV_WND); |
| 1330 | } |
| 1331 | } |
| 1332 | |
| 1333 | /* |
| 1334 | * Send RX credits through an RX_DATA_ACK CPL message. We are permitted |
| 1335 | * to return without sending the message in case we cannot allocate |
| 1336 | * an sk_buff. Returns the number of credits sent. |
| 1337 | */ |
| 1338 | static u32 send_rx_credits(struct chtls_sock *csk, u32 credits) |
| 1339 | { |
| 1340 | struct cpl_rx_data_ack *req; |
| 1341 | struct sk_buff *skb; |
| 1342 | |
| 1343 | skb = alloc_skb(sizeof(*req), GFP_ATOMIC); |
| 1344 | if (!skb) |
| 1345 | return 0; |
| 1346 | __skb_put(skb, sizeof(*req)); |
| 1347 | req = (struct cpl_rx_data_ack *)skb->head; |
| 1348 | |
| 1349 | set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); |
| 1350 | INIT_TP_WR(req, csk->tid); |
| 1351 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, |
| 1352 | csk->tid)); |
| 1353 | req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits) | |
| 1354 | RX_FORCE_ACK_F); |
| 1355 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); |
| 1356 | return credits; |
| 1357 | } |
| 1358 | |
| 1359 | #define CREDIT_RETURN_STATE (TCPF_ESTABLISHED | \ |
| 1360 | TCPF_FIN_WAIT1 | \ |
| 1361 | TCPF_FIN_WAIT2) |
| 1362 | |
| 1363 | /* |
| 1364 | * Called after some received data has been read. It returns RX credits |
| 1365 | * to the HW for the amount of data processed. |
| 1366 | */ |
| 1367 | static void chtls_cleanup_rbuf(struct sock *sk, int copied) |
| 1368 | { |
| 1369 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| 1370 | struct tcp_sock *tp; |
| 1371 | int must_send; |
| 1372 | u32 credits; |
| 1373 | u32 thres; |
| 1374 | |
| 1375 | thres = 15 * 1024; |
| 1376 | |
| 1377 | if (!sk_in_state(sk, CREDIT_RETURN_STATE)) |
| 1378 | return; |
| 1379 | |
| 1380 | chtls_select_window(sk); |
| 1381 | tp = tcp_sk(sk); |
| 1382 | credits = tp->copied_seq - tp->rcv_wup; |
| 1383 | if (unlikely(!credits)) |
| 1384 | return; |
| 1385 | |
| 1386 | /* |
| 1387 | * For coalescing to work effectively ensure the receive window has |
| 1388 | * at least 16KB left. |
| 1389 | */ |
| 1390 | must_send = credits + 16384 >= tp->rcv_wnd; |
| 1391 | |
| 1392 | if (must_send || credits >= thres) |
| 1393 | tp->rcv_wup += send_rx_credits(csk, credits); |
| 1394 | } |
| 1395 | |
| 1396 | static int chtls_pt_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
| 1397 | int nonblock, int flags, int *addr_len) |
| 1398 | { |
| 1399 | struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1400 | struct chtls_hws *hws = &csk->tlshws; |
| 1401 | struct tcp_sock *tp = tcp_sk(sk); |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1402 | unsigned long avail; |
| 1403 | int buffers_freed; |
| 1404 | int copied = 0; |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1405 | int target; |
| 1406 | long timeo; |
| 1407 | |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1408 | buffers_freed = 0; |
| 1409 | |
| 1410 | timeo = sock_rcvtimeo(sk, nonblock); |
| 1411 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1412 | |
| 1413 | if (unlikely(csk_flag(sk, CSK_UPDATE_RCV_WND))) |
| 1414 | chtls_cleanup_rbuf(sk, copied); |
| 1415 | |
| 1416 | do { |
| 1417 | struct sk_buff *skb; |
| 1418 | u32 offset = 0; |
| 1419 | |
| 1420 | if (unlikely(tp->urg_data && |
| 1421 | tp->urg_seq == tp->copied_seq)) { |
| 1422 | if (copied) |
| 1423 | break; |
| 1424 | if (signal_pending(current)) { |
| 1425 | copied = timeo ? sock_intr_errno(timeo) : |
| 1426 | -EAGAIN; |
| 1427 | break; |
| 1428 | } |
| 1429 | } |
| 1430 | skb = skb_peek(&sk->sk_receive_queue); |
| 1431 | if (skb) |
| 1432 | goto found_ok_skb; |
| 1433 | if (csk->wr_credits && |
| 1434 | skb_queue_len(&csk->txq) && |
| 1435 | chtls_push_frames(csk, csk->wr_credits == |
| 1436 | csk->wr_max_credits)) |
| 1437 | sk->sk_write_space(sk); |
| 1438 | |
| 1439 | if (copied >= target && !sk->sk_backlog.tail) |
| 1440 | break; |
| 1441 | |
| 1442 | if (copied) { |
| 1443 | if (sk->sk_err || sk->sk_state == TCP_CLOSE || |
| 1444 | (sk->sk_shutdown & RCV_SHUTDOWN) || |
| 1445 | signal_pending(current)) |
| 1446 | break; |
| 1447 | |
| 1448 | if (!timeo) |
| 1449 | break; |
| 1450 | } else { |
| 1451 | if (sock_flag(sk, SOCK_DONE)) |
| 1452 | break; |
| 1453 | if (sk->sk_err) { |
| 1454 | copied = sock_error(sk); |
| 1455 | break; |
| 1456 | } |
| 1457 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 1458 | break; |
| 1459 | if (sk->sk_state == TCP_CLOSE) { |
| 1460 | copied = -ENOTCONN; |
| 1461 | break; |
| 1462 | } |
| 1463 | if (!timeo) { |
| 1464 | copied = -EAGAIN; |
| 1465 | break; |
| 1466 | } |
| 1467 | if (signal_pending(current)) { |
| 1468 | copied = sock_intr_errno(timeo); |
| 1469 | break; |
| 1470 | } |
| 1471 | } |
| 1472 | if (sk->sk_backlog.tail) { |
| 1473 | release_sock(sk); |
| 1474 | lock_sock(sk); |
| 1475 | chtls_cleanup_rbuf(sk, copied); |
| 1476 | continue; |
| 1477 | } |
| 1478 | |
| 1479 | if (copied >= target) |
| 1480 | break; |
| 1481 | chtls_cleanup_rbuf(sk, copied); |
| 1482 | sk_wait_data(sk, &timeo, NULL); |
Atul Gupta | 1dfe57a | 2018-05-27 21:15:21 +0530 | [diff] [blame] | 1483 | continue; |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1484 | found_ok_skb: |
| 1485 | if (!skb->len) { |
| 1486 | skb_dst_set(skb, NULL); |
| 1487 | __skb_unlink(skb, &sk->sk_receive_queue); |
| 1488 | kfree_skb(skb); |
| 1489 | |
| 1490 | if (!copied && !timeo) { |
| 1491 | copied = -EAGAIN; |
| 1492 | break; |
| 1493 | } |
| 1494 | |
| 1495 | if (copied < target) { |
| 1496 | release_sock(sk); |
| 1497 | lock_sock(sk); |
| 1498 | continue; |
| 1499 | } |
| 1500 | break; |
| 1501 | } |
| 1502 | offset = hws->copied_seq; |
| 1503 | avail = skb->len - offset; |
| 1504 | if (len < avail) |
| 1505 | avail = len; |
| 1506 | |
| 1507 | if (unlikely(tp->urg_data)) { |
| 1508 | u32 urg_offset = tp->urg_seq - tp->copied_seq; |
| 1509 | |
| 1510 | if (urg_offset < avail) { |
| 1511 | if (urg_offset) { |
| 1512 | avail = urg_offset; |
| 1513 | } else if (!sock_flag(sk, SOCK_URGINLINE)) { |
| 1514 | /* First byte is urgent, skip */ |
| 1515 | tp->copied_seq++; |
| 1516 | offset++; |
| 1517 | avail--; |
| 1518 | if (!avail) |
| 1519 | goto skip_copy; |
| 1520 | } |
| 1521 | } |
| 1522 | } |
Atul Gupta | 17a7d24a | 2018-05-14 16:41:38 +0530 | [diff] [blame] | 1523 | if (skb_copy_datagram_msg(skb, offset, msg, avail)) { |
| 1524 | if (!copied) { |
| 1525 | copied = -EFAULT; |
| 1526 | break; |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1527 | } |
| 1528 | } |
Atul Gupta | 17a7d24a | 2018-05-14 16:41:38 +0530 | [diff] [blame] | 1529 | |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1530 | copied += avail; |
| 1531 | len -= avail; |
| 1532 | hws->copied_seq += avail; |
| 1533 | skip_copy: |
| 1534 | if (tp->urg_data && after(tp->copied_seq, tp->urg_seq)) |
| 1535 | tp->urg_data = 0; |
| 1536 | |
Atul Gupta | 17a7d24a | 2018-05-14 16:41:38 +0530 | [diff] [blame] | 1537 | if ((avail + offset) >= skb->len) { |
Atul Gupta | 17a7d24a | 2018-05-14 16:41:38 +0530 | [diff] [blame] | 1538 | if (ULP_SKB_CB(skb)->flags & ULPCB_FLAG_TLS_HDR) { |
| 1539 | tp->copied_seq += skb->len; |
| 1540 | hws->rcvpld = skb->hdr_len; |
| 1541 | } else { |
| 1542 | tp->copied_seq += hws->rcvpld; |
| 1543 | } |
Dan Carpenter | f70b359 | 2018-06-01 10:59:25 +0300 | [diff] [blame] | 1544 | chtls_free_skb(sk, skb); |
| 1545 | buffers_freed++; |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1546 | hws->copied_seq = 0; |
| 1547 | if (copied >= target && |
| 1548 | !skb_peek(&sk->sk_receive_queue)) |
| 1549 | break; |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1550 | } |
| 1551 | } while (len > 0); |
| 1552 | |
| 1553 | if (buffers_freed) |
| 1554 | chtls_cleanup_rbuf(sk, copied); |
| 1555 | release_sock(sk); |
| 1556 | return copied; |
| 1557 | } |
| 1558 | |
| 1559 | /* |
| 1560 | * Peek at data in a socket's receive buffer. |
| 1561 | */ |
| 1562 | static int peekmsg(struct sock *sk, struct msghdr *msg, |
| 1563 | size_t len, int nonblock, int flags) |
| 1564 | { |
| 1565 | struct tcp_sock *tp = tcp_sk(sk); |
| 1566 | u32 peek_seq, offset; |
| 1567 | struct sk_buff *skb; |
| 1568 | int copied = 0; |
| 1569 | size_t avail; /* amount of available data in current skb */ |
| 1570 | long timeo; |
| 1571 | |
| 1572 | lock_sock(sk); |
| 1573 | timeo = sock_rcvtimeo(sk, nonblock); |
| 1574 | peek_seq = tp->copied_seq; |
| 1575 | |
| 1576 | do { |
| 1577 | if (unlikely(tp->urg_data && tp->urg_seq == peek_seq)) { |
| 1578 | if (copied) |
| 1579 | break; |
| 1580 | if (signal_pending(current)) { |
| 1581 | copied = timeo ? sock_intr_errno(timeo) : |
| 1582 | -EAGAIN; |
| 1583 | break; |
| 1584 | } |
| 1585 | } |
| 1586 | |
| 1587 | skb_queue_walk(&sk->sk_receive_queue, skb) { |
| 1588 | offset = peek_seq - ULP_SKB_CB(skb)->seq; |
| 1589 | if (offset < skb->len) |
| 1590 | goto found_ok_skb; |
| 1591 | } |
| 1592 | |
| 1593 | /* empty receive queue */ |
| 1594 | if (copied) |
| 1595 | break; |
| 1596 | if (sock_flag(sk, SOCK_DONE)) |
| 1597 | break; |
| 1598 | if (sk->sk_err) { |
| 1599 | copied = sock_error(sk); |
| 1600 | break; |
| 1601 | } |
| 1602 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 1603 | break; |
| 1604 | if (sk->sk_state == TCP_CLOSE) { |
| 1605 | copied = -ENOTCONN; |
| 1606 | break; |
| 1607 | } |
| 1608 | if (!timeo) { |
| 1609 | copied = -EAGAIN; |
| 1610 | break; |
| 1611 | } |
| 1612 | if (signal_pending(current)) { |
| 1613 | copied = sock_intr_errno(timeo); |
| 1614 | break; |
| 1615 | } |
| 1616 | |
| 1617 | if (sk->sk_backlog.tail) { |
| 1618 | /* Do not sleep, just process backlog. */ |
| 1619 | release_sock(sk); |
| 1620 | lock_sock(sk); |
| 1621 | } else { |
| 1622 | sk_wait_data(sk, &timeo, NULL); |
| 1623 | } |
| 1624 | |
| 1625 | if (unlikely(peek_seq != tp->copied_seq)) { |
| 1626 | if (net_ratelimit()) |
| 1627 | pr_info("TCP(%s:%d), race in MSG_PEEK.\n", |
| 1628 | current->comm, current->pid); |
| 1629 | peek_seq = tp->copied_seq; |
| 1630 | } |
| 1631 | continue; |
| 1632 | |
| 1633 | found_ok_skb: |
| 1634 | avail = skb->len - offset; |
| 1635 | if (len < avail) |
| 1636 | avail = len; |
| 1637 | /* |
| 1638 | * Do we have urgent data here? We need to skip over the |
| 1639 | * urgent byte. |
| 1640 | */ |
| 1641 | if (unlikely(tp->urg_data)) { |
| 1642 | u32 urg_offset = tp->urg_seq - peek_seq; |
| 1643 | |
| 1644 | if (urg_offset < avail) { |
| 1645 | /* |
| 1646 | * The amount of data we are preparing to copy |
| 1647 | * contains urgent data. |
| 1648 | */ |
| 1649 | if (!urg_offset) { /* First byte is urgent */ |
| 1650 | if (!sock_flag(sk, SOCK_URGINLINE)) { |
| 1651 | peek_seq++; |
| 1652 | offset++; |
| 1653 | avail--; |
| 1654 | } |
| 1655 | if (!avail) |
| 1656 | continue; |
| 1657 | } else { |
| 1658 | /* stop short of the urgent data */ |
| 1659 | avail = urg_offset; |
| 1660 | } |
| 1661 | } |
| 1662 | } |
| 1663 | |
| 1664 | /* |
| 1665 | * If MSG_TRUNC is specified the data is discarded. |
| 1666 | */ |
| 1667 | if (likely(!(flags & MSG_TRUNC))) |
| 1668 | if (skb_copy_datagram_msg(skb, offset, msg, len)) { |
| 1669 | if (!copied) { |
| 1670 | copied = -EFAULT; |
| 1671 | break; |
| 1672 | } |
| 1673 | } |
| 1674 | peek_seq += avail; |
| 1675 | copied += avail; |
| 1676 | len -= avail; |
| 1677 | } while (len > 0); |
| 1678 | |
| 1679 | release_sock(sk); |
| 1680 | return copied; |
| 1681 | } |
| 1682 | |
| 1683 | int chtls_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
| 1684 | int nonblock, int flags, int *addr_len) |
| 1685 | { |
| 1686 | struct tcp_sock *tp = tcp_sk(sk); |
| 1687 | struct chtls_sock *csk; |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1688 | unsigned long avail; /* amount of available data in current skb */ |
| 1689 | int buffers_freed; |
| 1690 | int copied = 0; |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1691 | long timeo; |
| 1692 | int target; /* Read at least this many bytes */ |
| 1693 | |
| 1694 | buffers_freed = 0; |
| 1695 | |
| 1696 | if (unlikely(flags & MSG_OOB)) |
| 1697 | return tcp_prot.recvmsg(sk, msg, len, nonblock, flags, |
| 1698 | addr_len); |
| 1699 | |
| 1700 | if (unlikely(flags & MSG_PEEK)) |
| 1701 | return peekmsg(sk, msg, len, nonblock, flags); |
| 1702 | |
| 1703 | if (sk_can_busy_loop(sk) && |
| 1704 | skb_queue_empty(&sk->sk_receive_queue) && |
| 1705 | sk->sk_state == TCP_ESTABLISHED) |
| 1706 | sk_busy_loop(sk, nonblock); |
| 1707 | |
| 1708 | lock_sock(sk); |
| 1709 | csk = rcu_dereference_sk_user_data(sk); |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1710 | |
| 1711 | if (is_tls_rx(csk)) |
| 1712 | return chtls_pt_recvmsg(sk, msg, len, nonblock, |
| 1713 | flags, addr_len); |
| 1714 | |
| 1715 | timeo = sock_rcvtimeo(sk, nonblock); |
| 1716 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); |
Atul Gupta | b647993 | 2018-03-31 21:42:01 +0530 | [diff] [blame] | 1717 | |
| 1718 | if (unlikely(csk_flag(sk, CSK_UPDATE_RCV_WND))) |
| 1719 | chtls_cleanup_rbuf(sk, copied); |
| 1720 | |
| 1721 | do { |
| 1722 | struct sk_buff *skb; |
| 1723 | u32 offset; |
| 1724 | |
| 1725 | if (unlikely(tp->urg_data && tp->urg_seq == tp->copied_seq)) { |
| 1726 | if (copied) |
| 1727 | break; |
| 1728 | if (signal_pending(current)) { |
| 1729 | copied = timeo ? sock_intr_errno(timeo) : |
| 1730 | -EAGAIN; |
| 1731 | break; |
| 1732 | } |
| 1733 | } |
| 1734 | |
| 1735 | skb = skb_peek(&sk->sk_receive_queue); |
| 1736 | if (skb) |
| 1737 | goto found_ok_skb; |
| 1738 | |
| 1739 | if (csk->wr_credits && |
| 1740 | skb_queue_len(&csk->txq) && |
| 1741 | chtls_push_frames(csk, csk->wr_credits == |
| 1742 | csk->wr_max_credits)) |
| 1743 | sk->sk_write_space(sk); |
| 1744 | |
| 1745 | if (copied >= target && !sk->sk_backlog.tail) |
| 1746 | break; |
| 1747 | |
| 1748 | if (copied) { |
| 1749 | if (sk->sk_err || sk->sk_state == TCP_CLOSE || |
| 1750 | (sk->sk_shutdown & RCV_SHUTDOWN) || |
| 1751 | signal_pending(current)) |
| 1752 | break; |
| 1753 | } else { |
| 1754 | if (sock_flag(sk, SOCK_DONE)) |
| 1755 | break; |
| 1756 | if (sk->sk_err) { |
| 1757 | copied = sock_error(sk); |
| 1758 | break; |
| 1759 | } |
| 1760 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 1761 | break; |
| 1762 | if (sk->sk_state == TCP_CLOSE) { |
| 1763 | copied = -ENOTCONN; |
| 1764 | break; |
| 1765 | } |
| 1766 | if (!timeo) { |
| 1767 | copied = -EAGAIN; |
| 1768 | break; |
| 1769 | } |
| 1770 | if (signal_pending(current)) { |
| 1771 | copied = sock_intr_errno(timeo); |
| 1772 | break; |
| 1773 | } |
| 1774 | } |
| 1775 | |
| 1776 | if (sk->sk_backlog.tail) { |
| 1777 | release_sock(sk); |
| 1778 | lock_sock(sk); |
| 1779 | chtls_cleanup_rbuf(sk, copied); |
| 1780 | continue; |
| 1781 | } |
| 1782 | |
| 1783 | if (copied >= target) |
| 1784 | break; |
| 1785 | chtls_cleanup_rbuf(sk, copied); |
| 1786 | sk_wait_data(sk, &timeo, NULL); |
| 1787 | continue; |
| 1788 | |
| 1789 | found_ok_skb: |
| 1790 | if (!skb->len) { |
| 1791 | chtls_kfree_skb(sk, skb); |
| 1792 | if (!copied && !timeo) { |
| 1793 | copied = -EAGAIN; |
| 1794 | break; |
| 1795 | } |
| 1796 | |
| 1797 | if (copied < target) |
| 1798 | continue; |
| 1799 | |
| 1800 | break; |
| 1801 | } |
| 1802 | |
| 1803 | offset = tp->copied_seq - ULP_SKB_CB(skb)->seq; |
| 1804 | avail = skb->len - offset; |
| 1805 | if (len < avail) |
| 1806 | avail = len; |
| 1807 | |
| 1808 | if (unlikely(tp->urg_data)) { |
| 1809 | u32 urg_offset = tp->urg_seq - tp->copied_seq; |
| 1810 | |
| 1811 | if (urg_offset < avail) { |
| 1812 | if (urg_offset) { |
| 1813 | avail = urg_offset; |
| 1814 | } else if (!sock_flag(sk, SOCK_URGINLINE)) { |
| 1815 | tp->copied_seq++; |
| 1816 | offset++; |
| 1817 | avail--; |
| 1818 | if (!avail) |
| 1819 | goto skip_copy; |
| 1820 | } |
| 1821 | } |
| 1822 | } |
| 1823 | |
| 1824 | if (likely(!(flags & MSG_TRUNC))) { |
| 1825 | if (skb_copy_datagram_msg(skb, offset, |
| 1826 | msg, avail)) { |
| 1827 | if (!copied) { |
| 1828 | copied = -EFAULT; |
| 1829 | break; |
| 1830 | } |
| 1831 | } |
| 1832 | } |
| 1833 | |
| 1834 | tp->copied_seq += avail; |
| 1835 | copied += avail; |
| 1836 | len -= avail; |
| 1837 | |
| 1838 | skip_copy: |
| 1839 | if (tp->urg_data && after(tp->copied_seq, tp->urg_seq)) |
| 1840 | tp->urg_data = 0; |
| 1841 | |
| 1842 | if (avail + offset >= skb->len) { |
| 1843 | if (likely(skb)) |
| 1844 | chtls_free_skb(sk, skb); |
| 1845 | buffers_freed++; |
| 1846 | |
| 1847 | if (copied >= target && |
| 1848 | !skb_peek(&sk->sk_receive_queue)) |
| 1849 | break; |
| 1850 | } |
| 1851 | } while (len > 0); |
| 1852 | |
| 1853 | if (buffers_freed) |
| 1854 | chtls_cleanup_rbuf(sk, copied); |
| 1855 | |
| 1856 | release_sock(sk); |
| 1857 | return copied; |
| 1858 | } |