diff options
| -rw-r--r-- | lib/librte_ipsec/crypto.h | 123 | ||||
| -rw-r--r-- | lib/librte_ipsec/iph.h | 84 | ||||
| -rw-r--r-- | lib/librte_ipsec/ipsec_sqn.h | 186 | ||||
| -rw-r--r-- | lib/librte_ipsec/pad.h | 45 | ||||
| -rw-r--r-- | lib/librte_ipsec/sa.c | 1133 |
5 files changed, 1569 insertions, 2 deletions
diff --git a/lib/librte_ipsec/crypto.h b/lib/librte_ipsec/crypto.h new file mode 100644 index 0000000000..61f5c14337 --- /dev/null +++ b/lib/librte_ipsec/crypto.h @@ -0,0 +1,123 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Intel Corporation + */ + +#ifndef _CRYPTO_H_ +#define _CRYPTO_H_ + +/** + * @file crypto.h + * Contains crypto specific functions/structures/macros used internally + * by ipsec library. + */ + + /* + * AES-GCM devices have some specific requirements for IV and AAD formats. + * Ideally that to be done by the driver itself. + */ + +struct aead_gcm_iv { + uint32_t salt; + uint64_t iv; + uint32_t cnt; +} __attribute__((packed)); + +struct aead_gcm_aad { + uint32_t spi; + /* + * RFC 4106, section 5: + * Two formats of the AAD are defined: + * one for 32-bit sequence numbers, and one for 64-bit ESN. + */ + union { + uint32_t u32[2]; + uint64_t u64; + } sqn; + uint32_t align0; /* align to 16B boundary */ +} __attribute__((packed)); + +struct gcm_esph_iv { + struct esp_hdr esph; + uint64_t iv; +} __attribute__((packed)); + + +static inline void +aead_gcm_iv_fill(struct aead_gcm_iv *gcm, uint64_t iv, uint32_t salt) +{ + gcm->salt = salt; + gcm->iv = iv; + gcm->cnt = rte_cpu_to_be_32(1); +} + +/* + * RFC 4106, 5 AAD Construction + * spi and sqn should already be converted into network byte order. + * Make sure that not used bytes are zeroed. + */ +static inline void +aead_gcm_aad_fill(struct aead_gcm_aad *aad, rte_be32_t spi, rte_be64_t sqn, + int esn) +{ + aad->spi = spi; + if (esn) + aad->sqn.u64 = sqn; + else { + aad->sqn.u32[0] = sqn_low32(sqn); + aad->sqn.u32[1] = 0; + } + aad->align0 = 0; +} + +static inline void +gen_iv(uint64_t iv[IPSEC_MAX_IV_QWORD], rte_be64_t sqn) +{ + iv[0] = sqn; + iv[1] = 0; +} + +/* + * from RFC 4303 3.3.2.1.4: + * If the ESN option is enabled for the SA, the high-order 32 + * bits of the sequence number are appended after the Next Header field + * for purposes of this computation, but are not transmitted. + */ + +/* + * Helper function that moves ICV by 4B below, and inserts SQN.hibits. + * icv parameter points to the new start of ICV. + */ +static inline void +insert_sqh(uint32_t sqh, void *picv, uint32_t icv_len) +{ + uint32_t *icv; + int32_t i; + + RTE_ASSERT(icv_len % sizeof(uint32_t) == 0); + + icv = picv; + icv_len = icv_len / sizeof(uint32_t); + for (i = icv_len; i-- != 0; icv[i] = icv[i - 1]) + ; + + icv[i] = sqh; +} + +/* + * Helper function that moves ICV by 4B up, and removes SQN.hibits. + * icv parameter points to the new start of ICV. + */ +static inline void +remove_sqh(void *picv, uint32_t icv_len) +{ + uint32_t i, *icv; + + RTE_ASSERT(icv_len % sizeof(uint32_t) == 0); + + icv = picv; + icv_len = icv_len / sizeof(uint32_t); + for (i = 0; i != icv_len; i++) + icv[i] = icv[i + 1]; +} + +#endif /* _CRYPTO_H_ */ diff --git a/lib/librte_ipsec/iph.h b/lib/librte_ipsec/iph.h new file mode 100644 index 0000000000..58930cf188 --- /dev/null +++ b/lib/librte_ipsec/iph.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Intel Corporation + */ + +#ifndef _IPH_H_ +#define _IPH_H_ + +/** + * @file iph.h + * Contains functions/structures/macros to manipulate IPv4/IPv6 headers + * used internally by ipsec library. + */ + +/* + * Move preceding (L3) headers down to remove ESP header and IV. + */ +static inline void +remove_esph(char *np, char *op, uint32_t hlen) +{ + uint32_t i; + + for (i = hlen; i-- != 0; np[i] = op[i]) + ; +} + +/* + * Move preceding (L3) headers up to free space for ESP header and IV. + */ +static inline void +insert_esph(char *np, char *op, uint32_t hlen) +{ + uint32_t i; + + for (i = 0; i != hlen; i++) + np[i] = op[i]; +} + +/* update original ip header fields for transport case */ +static inline int +update_trs_l3hdr(const struct rte_ipsec_sa *sa, void *p, uint32_t plen, + uint32_t l2len, uint32_t l3len, uint8_t proto) +{ + struct ipv4_hdr *v4h; + struct ipv6_hdr *v6h; + int32_t rc; + + if ((sa->type & RTE_IPSEC_SATP_IPV_MASK) == RTE_IPSEC_SATP_IPV4) { + v4h = p; + rc = v4h->next_proto_id; + v4h->next_proto_id = proto; + v4h->total_length = rte_cpu_to_be_16(plen - l2len); + } else if (l3len == sizeof(*v6h)) { + v6h = p; + rc = v6h->proto; + v6h->proto = proto; + v6h->payload_len = rte_cpu_to_be_16(plen - l2len - + sizeof(*v6h)); + /* need to add support for IPv6 with options */ + } else + rc = -ENOTSUP; + + return rc; +} + +/* update original and new ip header fields for tunnel case */ +static inline void +update_tun_l3hdr(const struct rte_ipsec_sa *sa, void *p, uint32_t plen, + uint32_t l2len, rte_be16_t pid) +{ + struct ipv4_hdr *v4h; + struct ipv6_hdr *v6h; + + if (sa->type & RTE_IPSEC_SATP_MODE_TUNLV4) { + v4h = p; + v4h->packet_id = pid; + v4h->total_length = rte_cpu_to_be_16(plen - l2len); + } else { + v6h = p; + v6h->payload_len = rte_cpu_to_be_16(plen - l2len - + sizeof(*v6h)); + } +} + +#endif /* _IPH_H_ */ diff --git a/lib/librte_ipsec/ipsec_sqn.h b/lib/librte_ipsec/ipsec_sqn.h index 1935f6e304..6e18c34ebb 100644 --- a/lib/librte_ipsec/ipsec_sqn.h +++ b/lib/librte_ipsec/ipsec_sqn.h @@ -16,6 +16,45 @@ #define IS_ESN(sa) ((sa)->sqn_mask == UINT64_MAX) /* + * gets SQN.hi32 bits, SQN supposed to be in network byte order. + */ +static inline rte_be32_t +sqn_hi32(rte_be64_t sqn) +{ +#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN + return (sqn >> 32); +#else + return sqn; +#endif +} + +/* + * gets SQN.low32 bits, SQN supposed to be in network byte order. + */ +static inline rte_be32_t +sqn_low32(rte_be64_t sqn) +{ +#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN + return sqn; +#else + return (sqn >> 32); +#endif +} + +/* + * gets SQN.low16 bits, SQN supposed to be in network byte order. + */ +static inline rte_be16_t +sqn_low16(rte_be64_t sqn) +{ +#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN + return sqn; +#else + return (sqn >> 48); +#endif +} + +/* * for given size, calculate required number of buckets. */ static uint32_t @@ -30,6 +69,153 @@ replay_num_bucket(uint32_t wsz) return nb; } +/* + * According to RFC4303 A2.1, determine the high-order bit of sequence number. + * use 32bit arithmetic inside, return uint64_t. + */ +static inline uint64_t +reconstruct_esn(uint64_t t, uint32_t sqn, uint32_t w) +{ + uint32_t th, tl, bl; + + tl = t; + th = t >> 32; + bl = tl - w + 1; + + /* case A: window is within one sequence number subspace */ + if (tl >= (w - 1)) + th += (sqn < bl); + /* case B: window spans two sequence number subspaces */ + else if (th != 0) + th -= (sqn >= bl); + + /* return constructed sequence with proper high-order bits */ + return (uint64_t)th << 32 | sqn; +} + +/** + * Perform the replay checking. + * + * struct rte_ipsec_sa contains the window and window related parameters, + * such as the window size, bitmask, and the last acknowledged sequence number. + * + * Based on RFC 6479. + * Blocks are 64 bits unsigned integers + */ +static inline int32_t +esn_inb_check_sqn(const struct replay_sqn *rsn, const struct rte_ipsec_sa *sa, + uint64_t sqn) +{ + uint32_t bit, bucket; + + /* replay not enabled */ + if (sa->replay.win_sz == 0) + return 0; + + /* seq is larger than lastseq */ + if (sqn > rsn->sqn) + return 0; + + /* seq is outside window */ + if (sqn == 0 || sqn + sa->replay.win_sz < rsn->sqn) + return -EINVAL; + + /* seq is inside the window */ + bit = sqn & WINDOW_BIT_LOC_MASK; + bucket = (sqn >> WINDOW_BUCKET_BITS) & sa->replay.bucket_index_mask; + + /* already seen packet */ + if (rsn->window[bucket] & ((uint64_t)1 << bit)) + return -EINVAL; + + return 0; +} + +/** + * For outbound SA perform the sequence number update. + */ +static inline uint64_t +esn_outb_update_sqn(struct rte_ipsec_sa *sa, uint32_t *num) +{ + uint64_t n, s, sqn; + + n = *num; + sqn = sa->sqn.outb + n; + sa->sqn.outb = sqn; + + /* overflow */ + if (sqn > sa->sqn_mask) { + s = sqn - sa->sqn_mask; + *num = (s < n) ? n - s : 0; + } + + return sqn - n; +} + +/** + * For inbound SA perform the sequence number and replay window update. + */ +static inline int32_t +esn_inb_update_sqn(struct replay_sqn *rsn, const struct rte_ipsec_sa *sa, + uint64_t sqn) +{ + uint32_t bit, bucket, last_bucket, new_bucket, diff, i; + + /* replay not enabled */ + if (sa->replay.win_sz == 0) + return 0; + + /* handle ESN */ + if (IS_ESN(sa)) + sqn = reconstruct_esn(rsn->sqn, sqn, sa->replay.win_sz); + + /* seq is outside window*/ + if (sqn == 0 || sqn + sa->replay.win_sz < rsn->sqn) + return -EINVAL; + + /* update the bit */ + bucket = (sqn >> WINDOW_BUCKET_BITS); + + /* check if the seq is within the range */ + if (sqn > rsn->sqn) { + last_bucket = rsn->sqn >> WINDOW_BUCKET_BITS; + diff = bucket - last_bucket; + /* seq is way after the range of WINDOW_SIZE */ + if (diff > sa->replay.nb_bucket) + diff = sa->replay.nb_bucket; + + for (i = 0; i != diff; i++) { + new_bucket = (i + last_bucket + 1) & + sa->replay.bucket_index_mask; + rsn->window[new_bucket] = 0; + } + rsn->sqn = sqn; + } + + bucket &= sa->replay.bucket_index_mask; + bit = (uint64_t)1 << (sqn & WINDOW_BIT_LOC_MASK); + + /* already seen packet */ + if (rsn->window[bucket] & bit) + return -EINVAL; + + rsn->window[bucket] |= bit; + return 0; +} + +/** + * To achieve ability to do multiple readers single writer for + * SA replay window information and sequence number (RSN) + * basic RCU schema is used: + * SA have 2 copies of RSN (one for readers, another for writers). + * Each RSN contains a rwlock that has to be grabbed (for read/write) + * to avoid races between readers and writer. + * Writer is responsible to make a copy or reader RSN, update it + * and mark newly updated RSN as readers one. + * That approach is intended to minimize contention and cache sharing + * between writer and readers. + */ + /** * Based on number of buckets calculated required size for the * structure that holds replay window and sequence number (RSN) information. diff --git a/lib/librte_ipsec/pad.h b/lib/librte_ipsec/pad.h new file mode 100644 index 0000000000..2f5ccd00e5 --- /dev/null +++ b/lib/librte_ipsec/pad.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Intel Corporation + */ + +#ifndef _PAD_H_ +#define _PAD_H_ + +#define IPSEC_MAX_PAD_SIZE UINT8_MAX + +static const uint8_t esp_pad_bytes[IPSEC_MAX_PAD_SIZE] = { + 1, 2, 3, 4, 5, 6, 7, 8, + 9, 10, 11, 12, 13, 14, 15, 16, + 17, 18, 19, 20, 21, 22, 23, 24, + 25, 26, 27, 28, 29, 30, 31, 32, + 33, 34, 35, 36, 37, 38, 39, 40, + 41, 42, 43, 44, 45, 46, 47, 48, + 49, 50, 51, 52, 53, 54, 55, 56, + 57, 58, 59, 60, 61, 62, 63, 64, + 65, 66, 67, 68, 69, 70, 71, 72, + 73, 74, 75, 76, 77, 78, 79, 80, + 81, 82, 83, 84, 85, 86, 87, 88, + 89, 90, 91, 92, 93, 94, 95, 96, + 97, 98, 99, 100, 101, 102, 103, 104, + 105, 106, 107, 108, 109, 110, 111, 112, + 113, 114, 115, 116, 117, 118, 119, 120, + 121, 122, 123, 124, 125, 126, 127, 128, + 129, 130, 131, 132, 133, 134, 135, 136, + 137, 138, 139, 140, 141, 142, 143, 144, + 145, 146, 147, 148, 149, 150, 151, 152, + 153, 154, 155, 156, 157, 158, 159, 160, + 161, 162, 163, 164, 165, 166, 167, 168, + 169, 170, 171, 172, 173, 174, 175, 176, + 177, 178, 179, 180, 181, 182, 183, 184, + 185, 186, 187, 188, 189, 190, 191, 192, + 193, 194, 195, 196, 197, 198, 199, 200, + 201, 202, 203, 204, 205, 206, 207, 208, + 209, 210, 211, 212, 213, 214, 215, 216, + 217, 218, 219, 220, 221, 222, 223, 224, + 225, 226, 227, 228, 229, 230, 231, 232, + 233, 234, 235, 236, 237, 238, 239, 240, + 241, 242, 243, 244, 245, 246, 247, 248, + 249, 250, 251, 252, 253, 254, 255, +}; + +#endif /* _PAD_H_ */ diff --git a/lib/librte_ipsec/sa.c b/lib/librte_ipsec/sa.c index 5465198ac8..d263e7bcfd 100644 --- a/lib/librte_ipsec/sa.c +++ b/lib/librte_ipsec/sa.c @@ -6,9 +6,13 @@ #include <rte_esp.h> #include <rte_ip.h> #include <rte_errno.h> +#include <rte_cryptodev.h> #include "sa.h" #include "ipsec_sqn.h" +#include "crypto.h" +#include "iph.h" +#include "pad.h" /* some helper structures */ struct crypto_xform { @@ -101,6 +105,9 @@ rte_ipsec_sa_fini(struct rte_ipsec_sa *sa) memset(sa, 0, sa->size); } +/* + * Determine expected SA type based on input parameters. + */ static int fill_sa_type(const struct rte_ipsec_sa_prm *prm, uint64_t *type) { @@ -155,6 +162,9 @@ fill_sa_type(const struct rte_ipsec_sa_prm *prm, uint64_t *type) return 0; } +/* + * Init ESP inbound specific things. + */ static void esp_inb_init(struct rte_ipsec_sa *sa) { @@ -165,6 +175,9 @@ esp_inb_init(struct rte_ipsec_sa *sa) sa->ctp.cipher.length = sa->icv_len + sa->ctp.cipher.offset; } +/* + * Init ESP inbound tunnel specific things. + */ static void esp_inb_tun_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm) { @@ -172,6 +185,9 @@ esp_inb_tun_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm) esp_inb_init(sa); } +/* + * Init ESP outbound specific things. + */ static void esp_outb_init(struct rte_ipsec_sa *sa, uint32_t hlen) { @@ -190,6 +206,9 @@ esp_outb_init(struct rte_ipsec_sa *sa, uint32_t hlen) } } +/* + * Init ESP outbound tunnel specific things. + */ static void esp_outb_tun_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm) { @@ -201,6 +220,9 @@ esp_outb_tun_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm) esp_outb_init(sa, sa->hdr_len); } +/* + * helper function, init SA structure. + */ static int esp_sa_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm, const struct crypto_xform *cxf) @@ -212,6 +234,7 @@ esp_sa_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm, /* RFC 4106 */ if (cxf->aead->algo != RTE_CRYPTO_AEAD_AES_GCM) return -EINVAL; + sa->aad_len = sizeof(struct aead_gcm_aad); sa->icv_len = cxf->aead->digest_length; sa->iv_ofs = cxf->aead->iv.offset; sa->iv_len = sizeof(uint64_t); @@ -334,18 +357,1124 @@ rte_ipsec_sa_init(struct rte_ipsec_sa *sa, const struct rte_ipsec_sa_prm *prm, return sz; } +static inline void +mbuf_bulk_copy(struct rte_mbuf *dst[], struct rte_mbuf * const src[], + uint32_t num) +{ + uint32_t i; + + for (i = 0; i != num; i++) + dst[i] = src[i]; +} + +/* + * setup crypto ops for LOOKASIDE_NONE (pure crypto) type of devices. + */ +static inline void +lksd_none_cop_prepare(const struct rte_ipsec_session *ss, + struct rte_mbuf *mb[], struct rte_crypto_op *cop[], uint16_t num) +{ + uint32_t i; + struct rte_crypto_sym_op *sop; + + for (i = 0; i != num; i++) { + sop = cop[i]->sym; + cop[i]->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC; + cop[i]->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED; + cop[i]->sess_type = RTE_CRYPTO_OP_WITH_SESSION; + sop->m_src = mb[i]; + __rte_crypto_sym_op_attach_sym_session(sop, ss->crypto.ses); + } +} + +/* + * setup crypto op and crypto sym op for ESP outbound packet. + */ +static inline void +esp_outb_cop_prepare(struct rte_crypto_op *cop, + const struct rte_ipsec_sa *sa, const uint64_t ivp[IPSEC_MAX_IV_QWORD], + const union sym_op_data *icv, uint32_t hlen, uint32_t plen) +{ + struct rte_crypto_sym_op *sop; + struct aead_gcm_iv *gcm; + + /* fill sym op fields */ + sop = cop->sym; + + /* AEAD (AES_GCM) case */ + if (sa->aad_len != 0) { + sop->aead.data.offset = sa->ctp.cipher.offset + hlen; + sop->aead.data.length = sa->ctp.cipher.length + plen; + sop->aead.digest.data = icv->va; + sop->aead.digest.phys_addr = icv->pa; + sop->aead.aad.data = icv->va + sa->icv_len; + sop->aead.aad.phys_addr = icv->pa + sa->icv_len; + + /* fill AAD IV (located inside crypto op) */ + gcm = rte_crypto_op_ctod_offset(cop, struct aead_gcm_iv *, + sa->iv_ofs); + aead_gcm_iv_fill(gcm, ivp[0], sa->salt); + /* CRYPT+AUTH case */ + } else { + sop->cipher.data.offset = sa->ctp.cipher.offset + hlen; + sop->cipher.data.length = sa->ctp.cipher.length + plen; + sop->auth.data.offset = sa->ctp.auth.offset + hlen; + sop->auth.data.length = sa->ctp.auth.length + plen; + sop->auth.digest.data = icv->va; + sop->auth.digest.phys_addr = icv->pa; + } +} + +/* + * setup/update packet data and metadata for ESP outbound tunnel case. + */ +static inline int32_t +esp_outb_tun_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc, + const uint64_t ivp[IPSEC_MAX_IV_QWORD], struct rte_mbuf *mb, + union sym_op_data *icv) +{ + uint32_t clen, hlen, l2len, pdlen, pdofs, plen, tlen; + struct rte_mbuf *ml; + struct esp_hdr *esph; + struct esp_tail *espt; + char *ph, *pt; + uint64_t *iv; + + /* calculate extra header space required */ + hlen = sa->hdr_len + sa->iv_len + sizeof(*esph); + + /* size of ipsec protected data */ + l2len = mb->l2_len; + plen = mb->pkt_len - mb->l2_len; + + /* number of bytes to encrypt */ + clen = plen + sizeof(*espt); + clen = RTE_ALIGN_CEIL(clen, sa->pad_align); + + /* pad length + esp tail */ + pdlen = clen - plen; + tlen = pdlen + sa->icv_len; + + /* do append and prepend */ + ml = rte_pktmbuf_lastseg(mb); + if (tlen + sa->sqh_len + sa->aad_len > rte_pktmbuf_tailroom(ml)) + return -ENOSPC; + + /* prepend header */ + ph = rte_pktmbuf_prepend(mb, hlen - l2len); + if (ph == NULL) + return -ENOSPC; + + /* append tail */ + pdofs = ml->data_len; + ml->data_len += tlen; + mb->pkt_len += tlen; + pt = rte_pktmbuf_mtod_offset(ml, typeof(pt), pdofs); + + /* update pkt l2/l3 len */ + mb->l2_len = sa->hdr_l3_off; + mb->l3_len = sa->hdr_len - sa->hdr_l3_off; + + /* copy tunnel pkt header */ + rte_memcpy(ph, sa->hdr, sa->hdr_len); + + /* update original and new ip header fields */ + update_tun_l3hdr(sa, ph + sa->hdr_l3_off, mb->pkt_len, sa->hdr_l3_off, + sqn_low16(sqc)); + + /* update spi, seqn and iv */ + esph = (struct esp_hdr *)(ph + sa->hdr_len); + iv = (uint64_t *)(esph + 1); + rte_memcpy(iv, ivp, sa->iv_len); + + esph->spi = sa->spi; + esph->seq = sqn_low32(sqc); + + /* offset for ICV */ + pdofs += pdlen + sa->sqh_len; + + /* pad length */ + pdlen -= sizeof(*espt); + + /* copy padding data */ + rte_memcpy(pt, esp_pad_bytes, pdlen); + + /* update esp trailer */ + espt = (struct esp_tail *)(pt + pdlen); + espt->pad_len = pdlen; + espt->next_proto = sa->proto; + + icv->va = rte_pktmbuf_mtod_offset(ml, void *, pdofs); + icv->pa = rte_pktmbuf_iova_offset(ml, pdofs); + + return clen; +} + +/* + * for pure cryptodev (lookaside none) depending on SA settings, + * we might have to write some extra data to the packet. + */ +static inline void +outb_pkt_xprepare(const struct rte_ipsec_sa *sa, rte_be64_t sqc, + const union sym_op_data *icv) +{ + uint32_t *psqh; + struct aead_gcm_aad *aad; + + /* insert SQN.hi between ESP trailer and ICV */ + if (sa->sqh_len != 0) { + psqh = (uint32_t *)(icv->va - sa->sqh_len); + psqh[0] = sqn_hi32(sqc); + } + + /* + * fill IV and AAD fields, if any (aad fields are placed after icv), + * right now we support only one AEAD algorithm: AES-GCM . + */ + if (sa->aad_len != 0) { + aad = (struct aead_gcm_aad *)(icv->va + sa->icv_len); + aead_gcm_aad_fill(aad, sa->spi, sqc, IS_ESN(sa)); + } +} + +/* + * setup/update packets and crypto ops for ESP outbound tunnel case. + */ +static uint16_t +outb_tun_prepare(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[], + struct rte_crypto_op *cop[], uint16_t num) +{ + int32_t rc; + uint32_t i, k, n; + uint64_t sqn; + rte_be64_t sqc; + struct rte_ipsec_sa *sa; + union sym_op_data icv; + uint64_t iv[IPSEC_MAX_IV_QWORD]; + struct rte_mbuf *dr[num]; + + sa = ss->sa; + + n = num; + sqn = esn_outb_update_sqn(sa, &n); + if (n != num) + rte_errno = EOVERFLOW; + + k = 0; + for (i = 0; i != n; i++) { + + sqc = rte_cpu_to_be_64(sqn + i); + gen_iv(iv, sqc); + + /* try to update the packet itself */ + rc = esp_outb_tun_pkt_prepare(sa, sqc, iv, mb[i], &icv); + + /* success, setup crypto op */ + if (rc >= 0) { + mb[k] = mb[i]; + outb_pkt_xprepare(sa, sqc, &icv); + esp_outb_cop_prepare(cop[k], sa, iv, &icv, 0, rc); + k++; + /* failure, put packet into the death-row */ + } else { + dr[i - k] = mb[i]; + rte_errno = -rc; + } + } + + /* update cops */ + lksd_none_cop_prepare(ss, mb, cop, k); + + /* copy not prepared mbufs beyond good ones */ + if (k != n && k != 0) + mbuf_bulk_copy(mb + k, dr, n - k); + + return k; +} + +/* + * setup/update packet data and metadata for ESP outbound transport case. + */ +static inline int32_t +esp_outb_trs_pkt_prepare(struct rte_ipsec_sa *sa, rte_be64_t sqc, + const uint64_t ivp[IPSEC_MAX_IV_QWORD], struct rte_mbuf *mb, + uint32_t l2len, uint32_t l3len, union sym_op_data *icv) +{ + uint8_t np; + uint32_t clen, hlen, pdlen, pdofs, plen, tlen, uhlen; + struct rte_mbuf *ml; + struct esp_hdr *esph; + struct esp_tail *espt; + char *ph, *pt; + uint64_t *iv; + + uhlen = l2len + l3len; + plen = mb->pkt_len - uhlen; + + /* calculate extra header space required */ + hlen = sa->iv_len + sizeof(*esph); + + /* number of bytes to encrypt */ + clen = plen + sizeof(*espt); + clen = RTE_ALIGN_CEIL(clen, sa->pad_align); + + /* pad length + esp tail */ + pdlen = clen - plen; + tlen = pdlen + sa->icv_len; + + /* do append and insert */ + ml = rte_pktmbuf_lastseg(mb); + if (tlen + sa->sqh_len + sa->aad_len > rte_pktmbuf_tailroom(ml)) + return -ENOSPC; + + /* prepend space for ESP header */ + ph = rte_pktmbuf_prepend(mb, hlen); + if (ph == NULL) + return -ENOSPC; + + /* append tail */ + pdofs = ml->data_len; + ml->data_len += tlen; + mb->pkt_len += tlen; + pt = rte_pktmbuf_mtod_offset(ml, typeof(pt), pdofs); + + /* shift L2/L3 headers */ + insert_esph(ph, ph + hlen, uhlen); + + /* update ip header fields */ + np = update_trs_l3hdr(sa, ph + l2len, mb->pkt_len, l2len, l3len, + IPPROTO_ESP); + + /* update spi, seqn and iv */ + esph = (struct esp_hdr *)(ph + uhlen); + iv = (uint64_t *)(esph + 1); + rte_memcpy(iv, ivp, sa->iv_len); + + esph->spi = sa->spi; + esph->seq = sqn_low32(sqc); + + /* offset for ICV */ + pdofs += pdlen + sa->sqh_len; + + /* pad length */ + pdlen -= sizeof(*espt); + + /* copy padding data */ + rte_memcpy(pt, esp_pad_bytes, pdlen); + + /* update esp trailer */ + espt = (struct esp_tail *)(pt + pdlen); + espt->pad_len = pdlen; + espt->next_proto = np; + + icv->va = rte_pktmbuf_mtod_offset(ml, void *, pdofs); + icv->pa = rte_pktmbuf_iova_offset(ml, pdofs); + + return clen; +} + +/* + * setup/update packets and crypto ops for ESP outbound transport case. + */ +static uint16_t +outb_trs_prepare(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[], + struct rte_crypto_op *cop[], uint16_t num) +{ + int32_t rc; + uint32_t i, k, n, l2, l3; + uint64_t sqn; + rte_be64_t sqc; + struct rte_ipsec_sa *sa; + union sym_op_data icv; + uint64_t iv[IPSEC_MAX_IV_QWORD]; + struct rte_mbuf *dr[num]; + + sa = ss->sa; + + n = num; + sqn = esn_outb_update_sqn(sa, &n); + if (n != num) + rte_errno = EOVERFLOW; + + k = 0; + for (i = 0; i != n; i++) { + + l2 = mb[i]->l2_len; + l3 = mb[i]->l3_len; + + sqc = rte_cpu_to_be_64(sqn + i); + gen_iv(iv, sqc); + + /* try to update the packet itself */ + rc = esp_outb_trs_pkt_prepare(sa, sqc, iv, mb[i], + l2, l3, &icv); + + /* success, setup crypto op */ + if (rc >= 0) { + mb[k] = mb[i]; + outb_pkt_xprepare(sa, sqc, &icv); + esp_outb_cop_prepare(cop[k], sa, iv, &icv, l2 + l3, rc); + k++; + /* failure, put packet into the death-row */ + } else { + dr[i - k] = mb[i]; + rte_errno = -rc; + } + } + + /* update cops */ + lksd_none_cop_prepare(ss, mb, cop, k); + + /* copy not prepared mbufs beyond good ones */ + if (k != n && k != 0) + mbuf_bulk_copy(mb + k, dr, n - k); + + return k; +} + +/* + * setup crypto op and crypto sym op for ESP inbound tunnel packet. + */ +static inline int32_t +esp_inb_tun_cop_prepare(struct rte_crypto_op *cop, + const struct rte_ipsec_sa *sa, struct rte_mbuf *mb, + const union sym_op_data *icv, uint32_t pofs, uint32_t plen) +{ + struct rte_crypto_sym_op *sop; + struct aead_gcm_iv *gcm; + uint64_t *ivc, *ivp; + uint32_t clen; + + clen = plen - sa->ctp.cipher.length; + if ((int32_t)clen < 0 || (clen & (sa->pad_align - 1)) != 0) + return -EINVAL; + + /* fill sym op fields */ + sop = cop->sym; + + /* AEAD (AES_GCM) case */ + if (sa->aad_len != 0) { + sop->aead.data.offset = pofs + sa->ctp.cipher.offset; + sop->aead.data.length = clen; + sop->aead.digest.data = icv->va; + sop->aead.digest.phys_addr = icv->pa; + sop->aead.aad.data = icv->va + sa->icv_len; + sop->aead.aad.phys_addr = icv->pa + sa->icv_len; + + /* fill AAD IV (located inside crypto op) */ + gcm = rte_crypto_op_ctod_offset(cop, struct aead_gcm_iv *, + sa->iv_ofs); + ivp = rte_pktmbuf_mtod_offset(mb, uint64_t *, + pofs + sizeof(struct esp_hdr)); + aead_gcm_iv_fill(gcm, ivp[0], sa->salt); + /* CRYPT+AUTH case */ + } else { + sop->cipher.data.offset = pofs + sa->ctp.cipher.offset; + sop->cipher.data.length = clen; + sop->auth.data.offset = pofs + sa->ctp.auth.offset; + sop->auth.data.length = plen - sa->ctp.auth.length; + sop->auth.digest.data = icv->va; + sop->auth.digest.phys_addr = icv->pa; + + /* copy iv from the input packet to the cop */ + ivc = rte_crypto_op_ctod_offset(cop, uint64_t *, sa->iv_ofs); + ivp = rte_pktmbuf_mtod_offset(mb, uint64_t *, + pofs + sizeof(struct esp_hdr)); + rte_memcpy(ivc, ivp, sa->iv_len); + } + return 0; +} + +/* + * for pure cryptodev (lookaside none) depending on SA settings, + * we might have to write some extra data to the packet. + */ +static inline void +inb_pkt_xprepare(const struct rte_ipsec_sa *sa, rte_be64_t sqc, + const union sym_op_data *icv) +{ + struct aead_gcm_aad *aad; + + /* insert SQN.hi between ESP trailer and ICV */ + if (sa->sqh_len != 0) + insert_sqh(sqn_hi32(sqc), icv->va, sa->icv_len); + + /* + * fill AAD fields, if any (aad fields are placed after icv), + * right now we support only one AEAD algorithm: AES-GCM. + */ + if (sa->aad_len != 0) { + aad = (struct aead_gcm_aad *)(icv->va + sa->icv_len); + aead_gcm_aad_fill(aad, sa->spi, sqc, IS_ESN(sa)); + } +} + +/* + * setup/update packet data and metadata for ESP inbound tunnel case. + */ +static inline int32_t +esp_inb_tun_pkt_prepare(const struct rte_ipsec_sa *sa, + const struct replay_sqn *rsn, struct rte_mbuf *mb, + uint32_t hlen, union sym_op_data *icv) +{ + int32_t rc; + uint64_t sqn; + uint32_t icv_ofs, plen; + struct rte_mbuf *ml; + struct esp_hdr *esph; + + esph = rte_pktmbuf_mtod_offset(mb, struct esp_hdr *, hlen); + + /* + * retrieve and reconstruct SQN, then check it, then + * convert it back into network byte order. + */ + sqn = rte_be_to_cpu_32(esph->seq); + if (IS_ESN(sa)) + sqn = reconstruct_esn(rsn->sqn, sqn, sa->replay.win_sz); + + rc = esn_inb_check_sqn(rsn, sa, sqn); + if (rc != 0) + return rc; + + sqn = rte_cpu_to_be_64(sqn); + + /* start packet manipulation */ + plen = mb->pkt_len; + plen = plen - hlen; + + ml = rte_pktmbuf_lastseg(mb); + icv_ofs = ml->data_len - sa->icv_len + sa->sqh_len; + + /* we have to allocate space for AAD somewhere, + * right now - just use free trailing space at the last segment. + * Would probably be more convenient to reserve space for AAD + * inside rte_crypto_op itself + * (again for IV space is already reserved inside cop). + */ + if (sa->aad_len + sa->sqh_len > rte_pktmbuf_tailroom(ml)) + return -ENOSPC; + + icv->va = rte_pktmbuf_mtod_offset(ml, void *, icv_ofs); + icv->pa = rte_pktmbuf_iova_offset(ml, icv_ofs); + + inb_pkt_xprepare(sa, sqn, icv); + return plen; +} + +/* + * setup/update packets and crypto ops for ESP inbound case. + */ +static uint16_t +inb_pkt_prepare(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[], + struct rte_crypto_op *cop[], uint16_t num) +{ + int32_t rc; + uint32_t i, k, hl; + struct rte_ipsec_sa *sa; + struct replay_sqn *rsn; + union sym_op_data icv; + struct rte_mbuf *dr[num]; + + sa = ss->sa; + rsn = sa->sqn.inb; + + k = 0; + for (i = 0; i != num; i++) { + + hl = mb[i]->l2_len + mb[i]->l3_len; + rc = esp_inb_tun_pkt_prepare(sa, rsn, mb[i], hl, &icv); + if (rc >= 0) + rc = esp_inb_tun_cop_prepare(cop[k], sa, mb[i], &icv, + hl, rc); + + if (rc == 0) + mb[k++] = mb[i]; + else { + dr[i - k] = mb[i]; + rte_errno = -rc; + } + } + + /* update cops */ + lksd_none_cop_prepare(ss, mb, cop, k); + + /* copy not prepared mbufs beyond good ones */ + if (k != num && k != 0) + mbuf_bulk_copy(mb + k, dr, num - k); + + return k; +} + +/* + * setup crypto ops for LOOKASIDE_PROTO type of devices. + */ +static inline void +lksd_proto_cop_prepare(const struct rte_ipsec_session *ss, + struct rte_mbuf *mb[], struct rte_crypto_op *cop[], uint16_t num) +{ + uint32_t i; + struct rte_crypto_sym_op *sop; + + for (i = 0; i != num; i++) { + sop = cop[i]->sym; + cop[i]->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC; + cop[i]->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED; + cop[i]->sess_type = RTE_CRYPTO_OP_SECURITY_SESSION; + sop->m_src = mb[i]; + __rte_security_attach_session(sop, ss->security.ses); + } +} + +/* + * setup packets and crypto ops for LOOKASIDE_PROTO type of devices. + * Note that for LOOKASIDE_PROTO all packet modifications will be + * performed by PMD/HW. + * SW has only to prepare crypto op. + */ +static uint16_t +lksd_proto_prepare(const struct rte_ipsec_session *ss, + struct rte_mbuf *mb[], struct rte_crypto_op *cop[], uint16_t num) +{ + lksd_proto_cop_prepare(ss, mb, cop, num); + return num; +} + +/* + * process ESP inbound tunnel packet. + */ +static inline int +esp_inb_tun_single_pkt_process(struct rte_ipsec_sa *sa, struct rte_mbuf *mb, + uint32_t *sqn) +{ + uint32_t hlen, icv_len, tlen; + struct esp_hdr *esph; + struct esp_tail *espt; + struct rte_mbuf *ml; + char *pd; + + if (mb->ol_flags & PKT_RX_SEC_OFFLOAD_FAILED) + return -EBADMSG; + + icv_len = sa->icv_len; + + ml = rte_pktmbuf_lastseg(mb); + espt = rte_pktmbuf_mtod_offset(ml, struct esp_tail *, + ml->data_len - icv_len - sizeof(*espt)); + + /* + * check padding and next proto. + * return an error if something is wrong. + */ + pd = (char *)espt - espt->pad_len; + if (espt->next_proto != sa->proto || + memcmp(pd, esp_pad_bytes, espt->pad_len)) + return -EINVAL; + + /* cut of ICV, ESP tail and padding bytes */ + tlen = icv_len + sizeof(*espt) + espt->pad_len; + ml->data_len -= tlen; + mb->pkt_len -= tlen; + + /* cut of L2/L3 headers, ESP header and IV */ + hlen = mb->l2_len + mb->l3_len; + esph = rte_pktmbuf_mtod_offset(mb, struct esp_hdr *, hlen); + rte_pktmbuf_adj(mb, hlen + sa->ctp.cipher.offset); + + /* retrieve SQN for later check */ + *sqn = rte_be_to_cpu_32(esph->seq); + + /* reset mbuf metatdata: L2/L3 len, packet type */ + mb->packet_type = RTE_PTYPE_UNKNOWN; + mb->l2_len = 0; + mb->l3_len = 0; + + /* clear the PKT_RX_SEC_OFFLOAD flag if set */ + mb->ol_flags &= ~(mb->ol_flags & PKT_RX_SEC_OFFLOAD); + return 0; +} + +/* + * process ESP inbound transport packet. + */ +static inline int +esp_inb_trs_single_pkt_process(struct rte_ipsec_sa *sa, struct rte_mbuf *mb, + uint32_t *sqn) +{ + uint32_t hlen, icv_len, l2len, l3len, tlen; + struct esp_hdr *esph; + struct esp_tail *espt; + struct rte_mbuf *ml; + char *np, *op, *pd; + + if (mb->ol_flags & PKT_RX_SEC_OFFLOAD_FAILED) + return -EBADMSG; + + icv_len = sa->icv_len; + + ml = rte_pktmbuf_lastseg(mb); + espt = rte_pktmbuf_mtod_offset(ml, struct esp_tail *, + ml->data_len - icv_len - sizeof(*espt)); + + /* check padding, return an error if something is wrong. */ + pd = (char *)espt - espt->pad_len; + if (memcmp(pd, esp_pad_bytes, espt->pad_len)) + return -EINVAL; + + /* cut of ICV, ESP tail and padding bytes */ + tlen = icv_len + sizeof(*espt) + espt->pad_len; + ml->data_len -= tlen; + mb->pkt_len -= tlen; + + /* retrieve SQN for later check */ + l2len = mb->l2_len; + l3len = mb->l3_len; + hlen = l2len + l3len; + op = rte_pktmbuf_mtod(mb, char *); + esph = (struct esp_hdr *)(op + hlen); + *sqn = rte_be_to_cpu_32(esph->seq); + + /* cut off ESP header and IV, update L3 header */ + np = rte_pktmbuf_adj(mb, sa->ctp.cipher.offset); + remove_esph(np, op, hlen); + update_trs_l3hdr(sa, np + l2len, mb->pkt_len, l2len, l3len, + espt->next_proto); + + /* reset mbuf packet type */ + mb->packet_type &= (RTE_PTYPE_L2_MASK | RTE_PTYPE_L3_MASK); + + /* clear the PKT_RX_SEC_OFFLOAD flag if set */ + mb->ol_flags &= ~(mb->ol_flags & PKT_RX_SEC_OFFLOAD); + return 0; +} + +/* + * for group of ESP inbound packets perform SQN check and update. + */ +static inline uint16_t +esp_inb_rsn_update(struct rte_ipsec_sa *sa, const uint32_t sqn[], + struct rte_mbuf *mb[], struct rte_mbuf *dr[], uint16_t num) +{ + uint32_t i, k; + struct replay_sqn *rsn; + + rsn = sa->sqn.inb; + + k = 0; + for (i = 0; i != num; i++) { + if (esn_inb_update_sqn(rsn, sa, sqn[i]) == 0) + mb[k++] = mb[i]; + else + dr[i - k] = mb[i]; + } + + return k; +} + +/* + * process group of ESP inbound tunnel packets. + */ +static uint16_t +inb_tun_pkt_process(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[], + uint16_t num) +{ + uint32_t i, k; + struct rte_ipsec_sa *sa; + uint32_t sqn[num]; + struct rte_mbuf *dr[num]; + + sa = ss->sa; + + /* process packets, extract seq numbers */ + + k = 0; + for (i = 0; i != num; i++) { + /* good packet */ + if (esp_inb_tun_single_pkt_process(sa, mb[i], sqn + k) == 0) + mb[k++] = mb[i]; + /* bad packet, will drop from furhter processing */ + else + dr[i - k] = mb[i]; + } + + /* update seq # and replay winow */ + k = esp_inb_rsn_update(sa, sqn, mb, dr + i - k, k); + + /* handle unprocessed mbufs */ + if (k != num) { + rte_errno = EBADMSG; + if (k != 0) + mbuf_bulk_copy(mb + k, dr, num - k); + } + + return k; +} + +/* + * process group of ESP inbound transport packets. + */ +static uint16_t +inb_trs_pkt_process(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[], + uint16_t num) +{ + uint32_t i, k; + uint32_t sqn[num]; + struct rte_ipsec_sa *sa; + struct rte_mbuf *dr[num]; + + sa = ss->sa; + + /* process packets, extract seq numbers */ + + k = 0; + for (i = 0; i != num; i++) { + /* good packet */ + if (esp_inb_trs_single_pkt_process(sa, mb[i], sqn + k) == 0) + mb[k++] = mb[i]; + /* bad packet, will drop from furhter processing */ + else + dr[i - k] = mb[i]; + } + + /* update seq # and replay winow */ + k = esp_inb_rsn_update(sa, sqn, mb, dr + i - k, k); + + /* handle unprocessed mbufs */ + if (k != num) { + rte_errno = EBADMSG; + if (k != 0) + mbuf_bulk_copy(mb + k, dr, num - k); + } + + return k; +} + +/* + * process outbound packets for SA with ESN support, + * for algorithms that require SQN.hibits to be implictly included + * into digest computation. + * In that case we have to move ICV bytes back to their proper place. + */ +static uint16_t +outb_sqh_process(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[], + uint16_t num) +{ + uint32_t i, k, icv_len, *icv; + struct rte_mbuf *ml; + struct rte_ipsec_sa *sa; + struct rte_mbuf *dr[num]; + + sa = ss->sa; + + k = 0; + icv_len = sa->icv_len; + + for (i = 0; i != num; i++) { + if ((mb[i]->ol_flags & PKT_RX_SEC_OFFLOAD_FAILED) == 0) { + ml = rte_pktmbuf_lastseg(mb[i]); + icv = rte_pktmbuf_mtod_offset(ml, void *, + ml->data_len - icv_len); + remove_sqh(icv, icv_len); + mb[k++] = mb[i]; + } else + dr[i - k] = mb[i]; + } + + /* handle unprocessed mbufs */ + if (k != num) { + rte_errno = EBADMSG; + if (k != 0) + mbuf_bulk_copy(mb + k, dr, num - k); + } + + return k; +} + +/* + * simplest pkt process routine: + * all actual processing is already done by HW/PMD, + * just check mbuf ol_flags. + * used for: + * - inbound for RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL + * - inbound/outbound for RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL + * - outbound for RTE_SECURITY_ACTION_TYPE_NONE when ESN is disabled + */ +static uint16_t +pkt_flag_process(const struct rte_ipsec_session *ss, struct rte_mbuf *mb[], + uint16_t num) +{ + uint32_t i, k; + struct rte_mbuf *dr[num]; + + RTE_SET_USED(ss); + + k = 0; + for (i = 0; i != num; i++) { + if ((mb[i]->ol_flags & PKT_RX_SEC_OFFLOAD_FAILED) == 0) + mb[k++] = mb[i]; + else + dr[i - k] = mb[i]; + } + + /* handle unprocessed mbufs */ + if (k != num) { + rte_errno = EBADMSG; + if (k != 0) + mbuf_bulk_copy(mb + k, dr, num - k); + } + + return k; +} + +/* + * prepare packets for inline ipsec processing: + * set ol_flags and attach metadata. + */ +static inline void +inline_outb_mbuf_prepare(const struct rte_ipsec_session *ss, + struct rte_mbuf *mb[], uint16_t num) +{ + uint32_t i, ol_flags; + + ol_flags = ss->security.ol_flags & RTE_SECURITY_TX_OLOAD_NEED_MDATA; + for (i = 0; i != num; i++) { + + mb[i]->ol_flags |= PKT_TX_SEC_OFFLOAD; + if (ol_flags != 0) + rte_security_set_pkt_metadata(ss->security.ctx, + ss->security.ses, mb[i], NULL); + } +} + +/* + * process group of ESP outbound tunnel packets destined for + * INLINE_CRYPTO type of device. + */ +static uint16_t +inline_outb_tun_pkt_process(const struct rte_ipsec_session *ss, + struct rte_mbuf *mb[], uint16_t num) +{ + int32_t rc; + uint32_t i, k, n; + uint64_t sqn; + rte_be64_t sqc; + struct rte_ipsec_sa *sa; + union sym_op_data icv; + uint64_t iv[IPSEC_MAX_IV_QWORD]; + struct rte_mbuf *dr[num]; + + sa = ss->sa; + + n = num; + sqn = esn_outb_update_sqn(sa, &n); + if (n != num) + rte_errno = EOVERFLOW; + + k = 0; + for (i = 0; i != n; i++) { + + sqc = rte_cpu_to_be_64(sqn + i); + gen_iv(iv, sqc); + + /* try to update the packet itself */ + rc = esp_outb_tun_pkt_prepare(sa, sqc, iv, mb[i], &icv); + + /* success, update mbuf fields */ + if (rc >= 0) + mb[k++] = mb[i]; + /* failure, put packet into the death-row */ + else { + dr[i - k] = mb[i]; + rte_errno = -rc; + } + } + + inline_outb_mbuf_prepare(ss, mb, k); + + /* copy not processed mbufs beyond good ones */ + if (k != n && k != 0) + mbuf_bulk_copy(mb + k, dr, n - k); + + return k; +} + +/* + * process group of ESP outbound transport packets destined for + * INLINE_CRYPTO type of device. + */ +static uint16_t +inline_outb_trs_pkt_process(const struct rte_ipsec_session *ss, + struct rte_mbuf *mb[], uint16_t num) +{ + int32_t rc; + uint32_t i, k, n, l2, l3; + uint64_t sqn; + rte_be64_t sqc; + struct rte_ipsec_sa *sa; + union sym_op_data icv; + uint64_t iv[IPSEC_MAX_IV_QWORD]; + struct rte_mbuf *dr[num]; + + sa = ss->sa; + + n = num; + sqn = esn_outb_update_sqn(sa, &n); + if (n != num) + rte_errno = EOVERFLOW; + + k = 0; + for (i = 0; i != n; i++) { + + l2 = mb[i]->l2_len; + l3 = mb[i]->l3_len; + + sqc = rte_cpu_to_be_64(sqn + i); + gen_iv(iv, sqc); + + /* try to update the packet itself */ + rc = esp_outb_trs_pkt_prepare(sa, sqc, iv, mb[i], + l2, l3, &icv); + + /* success, update mbuf fields */ + if (rc >= 0) + mb[k++] = mb[i]; + /* failure, put packet into the death-row */ + else { + dr[i - k] = mb[i]; + rte_errno = -rc; + } + } + + inline_outb_mbuf_prepare(ss, mb, k); + + /* copy not processed mbufs beyond good ones */ + if (k != n && k != 0) + mbuf_bulk_copy(mb + k, dr, n - k); + + return k; +} + +/* + * outbound for RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL: + * actual processing is done by HW/PMD, just set flags and metadata. + */ +static uint16_t +outb_inline_proto_process(const struct rte_ipsec_session *ss, + struct rte_mbuf *mb[], uint16_t num) +{ + inline_outb_mbuf_prepare(ss, mb, num); + return num; +} + +/* + * Select packet processing function for session on LOOKASIDE_NONE + * type of device. + */ +static int +lksd_none_pkt_func_select(const struct rte_ipsec_sa *sa, + struct rte_ipsec_sa_pkt_func *pf) +{ + int32_t rc; + + static const uint64_t msk = RTE_IPSEC_SATP_DIR_MASK | + RTE_IPSEC_SATP_MODE_MASK; + + rc = 0; + switch (sa->type & msk) { + case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV4): + case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV6): + pf->prepare = inb_pkt_prepare; + pf->process = inb_tun_pkt_process; + break; + case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TRANS): + pf->prepare = inb_pkt_prepare; + pf->process = inb_trs_pkt_process; + break; + case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV4): + case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV6): + pf->prepare = outb_tun_prepare; + pf->process = (sa->sqh_len != 0) ? + outb_sqh_process : pkt_flag_process; + break; + case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TRANS): + pf->prepare = outb_trs_prepare; + pf->process = (sa->sqh_len != 0) ? + outb_sqh_process : pkt_flag_process; + break; + default: + rc = -ENOTSUP; + } + + return rc; +} + +/* + * Select packet processing function for session on INLINE_CRYPTO + * type of device. + */ +static int +inline_crypto_pkt_func_select(const struct rte_ipsec_sa *sa, + struct rte_ipsec_sa_pkt_func *pf) +{ + int32_t rc; + + static const uint64_t msk = RTE_IPSEC_SATP_DIR_MASK | + RTE_IPSEC_SATP_MODE_MASK; + + rc = 0; + switch (sa->type & msk) { + case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV4): + case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TUNLV6): + pf->process = inb_tun_pkt_process; + break; + case (RTE_IPSEC_SATP_DIR_IB | RTE_IPSEC_SATP_MODE_TRANS): + pf->process = inb_trs_pkt_process; + break; + case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV4): + case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TUNLV6): + pf->process = inline_outb_tun_pkt_process; + break; + case (RTE_IPSEC_SATP_DIR_OB | RTE_IPSEC_SATP_MODE_TRANS): + pf->process = inline_outb_trs_pkt_process; + break; + default: + rc = -ENOTSUP; + } + + return rc; +} + +/* + * Select packet processing function for given session based on SA parameters + * and type of associated with the session device. + */ int ipsec_sa_pkt_func_select(const struct rte_ipsec_session *ss, const struct rte_ipsec_sa *sa, struct rte_ipsec_sa_pkt_func *pf) { int32_t rc; - RTE_SET_USED(sa); - rc = 0; pf[0] = (struct rte_ipsec_sa_pkt_func) { 0 }; switch (ss->type) { + case RTE_SECURITY_ACTION_TYPE_NONE: + rc = lksd_none_pkt_func_select(sa, pf); + break; + case RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO: + rc = inline_crypto_pkt_func_select(sa, pf); + break; + case RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL: + if ((sa->type & RTE_IPSEC_SATP_DIR_MASK) == + RTE_IPSEC_SATP_DIR_IB) + pf->process = pkt_flag_process; + else + pf->process = outb_inline_proto_process; + break; + case RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL: + pf->prepare = lksd_proto_prepare; + pf->process = pkt_flag_process; + break; default: rc = -ENOTSUP; } |