* Start RSN update. */
| 263 | * Start RSN update. |
| 264 | */ |
| 265 | static inline struct replay_sqn * |
| 266 | rsn_update_start(struct rte_ipsec_sa *sa) |
| 267 | { |
| 268 | uint32_t k, n; |
| 269 | struct replay_sqn *rsn; |
| 270 | |
| 271 | n = sa->sqn.inb.wridx; |
| 272 | |
| 273 | /* no active writers */ |
| 274 | RTE_ASSERT(n == sa->sqn.inb.rdidx); |
| 275 | |
| 276 | if (!SQN_ATOMIC(sa)) |
| 277 | return sa->sqn.inb.rsn[n]; |
| 278 | |
| 279 | k = REPLAY_SQN_NEXT(n); |
| 280 | sa->sqn.inb.wridx = k; |
| 281 | |
| 282 | rsn = sa->sqn.inb.rsn[k]; |
| 283 | rte_rwlock_write_lock(&rsn->rwl); |
| 284 | rsn_copy(sa, k, n); |
| 285 | |
| 286 | return rsn; |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * Finish RSN update. |
no test coverage detected