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11fdf7f2 TL |
1 | /* SPDX-License-Identifier: BSD-3-Clause |
2 | * Copyright(c) 2010-2015 Intel Corporation | |
7c673cae FG |
3 | */ |
4 | ||
5 | #include "rte_eth_bond_private.h" | |
6 | #include "rte_eth_bond_alb.h" | |
7 | ||
8 | static inline uint8_t | |
9 | simple_hash(uint8_t *hash_start, int hash_size) | |
10 | { | |
11 | int i; | |
12 | uint8_t hash; | |
13 | ||
14 | hash = 0; | |
15 | for (i = 0; i < hash_size; ++i) | |
16 | hash ^= hash_start[i]; | |
17 | ||
18 | return hash; | |
19 | } | |
20 | ||
9f95a23c | 21 | static uint16_t |
7c673cae FG |
22 | calculate_slave(struct bond_dev_private *internals) |
23 | { | |
9f95a23c | 24 | uint16_t idx; |
7c673cae FG |
25 | |
26 | idx = (internals->mode6.last_slave + 1) % internals->active_slave_count; | |
27 | internals->mode6.last_slave = idx; | |
28 | return internals->active_slaves[idx]; | |
29 | } | |
30 | ||
31 | int | |
32 | bond_mode_alb_enable(struct rte_eth_dev *bond_dev) | |
33 | { | |
34 | struct bond_dev_private *internals = bond_dev->data->dev_private; | |
35 | struct client_data *hash_table = internals->mode6.client_table; | |
36 | ||
37 | uint16_t data_size; | |
38 | char mem_name[RTE_ETH_NAME_MAX_LEN]; | |
39 | int socket_id = bond_dev->data->numa_node; | |
40 | ||
41 | /* Fill hash table with initial values */ | |
42 | memset(hash_table, 0, sizeof(struct client_data) * ALB_HASH_TABLE_SIZE); | |
43 | rte_spinlock_init(&internals->mode6.lock); | |
44 | internals->mode6.last_slave = ALB_NULL_INDEX; | |
45 | internals->mode6.ntt = 0; | |
46 | ||
47 | /* Initialize memory pool for ARP packets to send */ | |
48 | if (internals->mode6.mempool == NULL) { | |
49 | /* | |
50 | * 256 is size of ETH header, ARP header and nested VLAN headers. | |
51 | * The value is chosen to be cache aligned. | |
52 | */ | |
53 | data_size = 256 + RTE_PKTMBUF_HEADROOM; | |
11fdf7f2 TL |
54 | snprintf(mem_name, sizeof(mem_name), "%s_ALB", |
55 | bond_dev->device->name); | |
7c673cae FG |
56 | internals->mode6.mempool = rte_pktmbuf_pool_create(mem_name, |
57 | 512 * RTE_MAX_ETHPORTS, | |
58 | RTE_MEMPOOL_CACHE_MAX_SIZE >= 32 ? | |
59 | 32 : RTE_MEMPOOL_CACHE_MAX_SIZE, | |
60 | 0, data_size, socket_id); | |
61 | ||
62 | if (internals->mode6.mempool == NULL) { | |
11fdf7f2 TL |
63 | RTE_BOND_LOG(ERR, "%s: Failed to initialize ALB mempool.\n", |
64 | bond_dev->device->name); | |
7c673cae FG |
65 | goto mempool_alloc_error; |
66 | } | |
67 | } | |
68 | ||
69 | return 0; | |
70 | ||
71 | mempool_alloc_error: | |
72 | return -ENOMEM; | |
73 | } | |
74 | ||
75 | void bond_mode_alb_arp_recv(struct ether_hdr *eth_h, uint16_t offset, | |
76 | struct bond_dev_private *internals) { | |
77 | struct arp_hdr *arp; | |
78 | ||
79 | struct client_data *hash_table = internals->mode6.client_table; | |
80 | struct client_data *client_info; | |
81 | ||
82 | uint8_t hash_index; | |
83 | ||
84 | arp = (struct arp_hdr *) ((char *) (eth_h + 1) + offset); | |
85 | ||
86 | /* ARP Requests are forwarded to the application with no changes */ | |
87 | if (arp->arp_op != rte_cpu_to_be_16(ARP_OP_REPLY)) | |
88 | return; | |
89 | ||
90 | /* From now on, we analyze only ARP Reply packets */ | |
91 | hash_index = simple_hash((uint8_t *) &arp->arp_data.arp_sip, | |
92 | sizeof(arp->arp_data.arp_sip)); | |
93 | client_info = &hash_table[hash_index]; | |
94 | ||
95 | /* | |
96 | * We got reply for ARP Request send by the application. We need to | |
97 | * update client table when received data differ from what is stored | |
98 | * in ALB table and issue sending update packet to that slave. | |
99 | */ | |
100 | rte_spinlock_lock(&internals->mode6.lock); | |
101 | if (client_info->in_use == 0 || | |
102 | client_info->app_ip != arp->arp_data.arp_tip || | |
103 | client_info->cli_ip != arp->arp_data.arp_sip || | |
104 | !is_same_ether_addr(&client_info->cli_mac, &arp->arp_data.arp_sha) || | |
105 | client_info->vlan_count != offset / sizeof(struct vlan_hdr) || | |
106 | memcmp(client_info->vlan, eth_h + 1, offset) != 0 | |
107 | ) { | |
108 | client_info->in_use = 1; | |
109 | client_info->app_ip = arp->arp_data.arp_tip; | |
110 | client_info->cli_ip = arp->arp_data.arp_sip; | |
111 | ether_addr_copy(&arp->arp_data.arp_sha, &client_info->cli_mac); | |
112 | client_info->slave_idx = calculate_slave(internals); | |
113 | rte_eth_macaddr_get(client_info->slave_idx, &client_info->app_mac); | |
114 | ether_addr_copy(&client_info->app_mac, &arp->arp_data.arp_tha); | |
115 | memcpy(client_info->vlan, eth_h + 1, offset); | |
116 | client_info->vlan_count = offset / sizeof(struct vlan_hdr); | |
117 | } | |
118 | internals->mode6.ntt = 1; | |
119 | rte_spinlock_unlock(&internals->mode6.lock); | |
120 | } | |
121 | ||
11fdf7f2 | 122 | uint16_t |
7c673cae FG |
123 | bond_mode_alb_arp_xmit(struct ether_hdr *eth_h, uint16_t offset, |
124 | struct bond_dev_private *internals) | |
125 | { | |
126 | struct arp_hdr *arp; | |
127 | ||
128 | struct client_data *hash_table = internals->mode6.client_table; | |
129 | struct client_data *client_info; | |
130 | ||
131 | uint8_t hash_index; | |
132 | ||
133 | struct ether_addr bonding_mac; | |
134 | ||
135 | arp = (struct arp_hdr *)((char *)(eth_h + 1) + offset); | |
136 | ||
137 | /* | |
138 | * Traffic with src MAC other than bonding should be sent on | |
139 | * current primary port. | |
140 | */ | |
141 | rte_eth_macaddr_get(internals->port_id, &bonding_mac); | |
142 | if (!is_same_ether_addr(&bonding_mac, &arp->arp_data.arp_sha)) { | |
143 | rte_eth_macaddr_get(internals->current_primary_port, | |
144 | &arp->arp_data.arp_sha); | |
145 | return internals->current_primary_port; | |
146 | } | |
147 | ||
148 | hash_index = simple_hash((uint8_t *)&arp->arp_data.arp_tip, | |
149 | sizeof(uint32_t)); | |
150 | client_info = &hash_table[hash_index]; | |
151 | ||
152 | rte_spinlock_lock(&internals->mode6.lock); | |
153 | if (arp->arp_op == rte_cpu_to_be_16(ARP_OP_REPLY)) { | |
154 | if (client_info->in_use) { | |
155 | if (client_info->app_ip == arp->arp_data.arp_sip && | |
156 | client_info->cli_ip == arp->arp_data.arp_tip) { | |
157 | /* Entry is already assigned to this client */ | |
158 | if (!is_broadcast_ether_addr(&arp->arp_data.arp_tha)) { | |
159 | ether_addr_copy(&arp->arp_data.arp_tha, | |
160 | &client_info->cli_mac); | |
161 | } | |
162 | rte_eth_macaddr_get(client_info->slave_idx, | |
163 | &client_info->app_mac); | |
164 | ether_addr_copy(&client_info->app_mac, &arp->arp_data.arp_sha); | |
165 | memcpy(client_info->vlan, eth_h + 1, offset); | |
166 | client_info->vlan_count = offset / sizeof(struct vlan_hdr); | |
167 | rte_spinlock_unlock(&internals->mode6.lock); | |
168 | return client_info->slave_idx; | |
169 | } | |
170 | } | |
171 | ||
172 | /* Assign new slave to this client and update src mac in ARP */ | |
173 | client_info->in_use = 1; | |
174 | client_info->ntt = 0; | |
175 | client_info->app_ip = arp->arp_data.arp_sip; | |
176 | ether_addr_copy(&arp->arp_data.arp_tha, &client_info->cli_mac); | |
177 | client_info->cli_ip = arp->arp_data.arp_tip; | |
178 | client_info->slave_idx = calculate_slave(internals); | |
179 | rte_eth_macaddr_get(client_info->slave_idx, &client_info->app_mac); | |
180 | ether_addr_copy(&client_info->app_mac, &arp->arp_data.arp_sha); | |
181 | memcpy(client_info->vlan, eth_h + 1, offset); | |
182 | client_info->vlan_count = offset / sizeof(struct vlan_hdr); | |
183 | rte_spinlock_unlock(&internals->mode6.lock); | |
184 | return client_info->slave_idx; | |
185 | } | |
186 | ||
187 | /* If packet is not ARP Reply, send it on current primary port. */ | |
188 | rte_spinlock_unlock(&internals->mode6.lock); | |
189 | rte_eth_macaddr_get(internals->current_primary_port, | |
190 | &arp->arp_data.arp_sha); | |
191 | return internals->current_primary_port; | |
192 | } | |
193 | ||
11fdf7f2 | 194 | uint16_t |
7c673cae FG |
195 | bond_mode_alb_arp_upd(struct client_data *client_info, |
196 | struct rte_mbuf *pkt, struct bond_dev_private *internals) | |
197 | { | |
198 | struct ether_hdr *eth_h; | |
199 | struct arp_hdr *arp_h; | |
11fdf7f2 | 200 | uint16_t slave_idx; |
7c673cae FG |
201 | |
202 | rte_spinlock_lock(&internals->mode6.lock); | |
203 | eth_h = rte_pktmbuf_mtod(pkt, struct ether_hdr *); | |
204 | ||
205 | ether_addr_copy(&client_info->app_mac, ð_h->s_addr); | |
206 | ether_addr_copy(&client_info->cli_mac, ð_h->d_addr); | |
207 | if (client_info->vlan_count > 0) | |
208 | eth_h->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN); | |
209 | else | |
210 | eth_h->ether_type = rte_cpu_to_be_16(ETHER_TYPE_ARP); | |
211 | ||
212 | arp_h = (struct arp_hdr *)((char *)eth_h + sizeof(struct ether_hdr) | |
213 | + client_info->vlan_count * sizeof(struct vlan_hdr)); | |
214 | ||
215 | memcpy(eth_h + 1, client_info->vlan, | |
216 | client_info->vlan_count * sizeof(struct vlan_hdr)); | |
217 | ||
218 | ether_addr_copy(&client_info->app_mac, &arp_h->arp_data.arp_sha); | |
219 | arp_h->arp_data.arp_sip = client_info->app_ip; | |
220 | ether_addr_copy(&client_info->cli_mac, &arp_h->arp_data.arp_tha); | |
221 | arp_h->arp_data.arp_tip = client_info->cli_ip; | |
222 | ||
223 | arp_h->arp_hrd = rte_cpu_to_be_16(ARP_HRD_ETHER); | |
224 | arp_h->arp_pro = rte_cpu_to_be_16(ETHER_TYPE_IPv4); | |
225 | arp_h->arp_hln = ETHER_ADDR_LEN; | |
226 | arp_h->arp_pln = sizeof(uint32_t); | |
227 | arp_h->arp_op = rte_cpu_to_be_16(ARP_OP_REPLY); | |
228 | ||
229 | slave_idx = client_info->slave_idx; | |
230 | rte_spinlock_unlock(&internals->mode6.lock); | |
231 | ||
232 | return slave_idx; | |
233 | } | |
234 | ||
235 | void | |
236 | bond_mode_alb_client_list_upd(struct rte_eth_dev *bond_dev) | |
237 | { | |
238 | struct bond_dev_private *internals = bond_dev->data->dev_private; | |
239 | struct client_data *client_info; | |
240 | ||
241 | int i; | |
242 | ||
243 | /* If active slave count is 0, it's pointless to refresh alb table */ | |
244 | if (internals->active_slave_count <= 0) | |
245 | return; | |
246 | ||
247 | rte_spinlock_lock(&internals->mode6.lock); | |
248 | internals->mode6.last_slave = ALB_NULL_INDEX; | |
249 | ||
250 | for (i = 0; i < ALB_HASH_TABLE_SIZE; i++) { | |
251 | client_info = &internals->mode6.client_table[i]; | |
252 | if (client_info->in_use) { | |
253 | client_info->slave_idx = calculate_slave(internals); | |
254 | rte_eth_macaddr_get(client_info->slave_idx, &client_info->app_mac); | |
255 | internals->mode6.ntt = 1; | |
256 | } | |
257 | } | |
258 | rte_spinlock_unlock(&internals->mode6.lock); | |
259 | } |