From: Adrien Mazarguil Date: Thu, 19 Apr 2018 10:07:44 +0000 (+0200) Subject: ethdev: fix shallow copy of flow API RSS action X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=972bf3610611;p=dpdk.git ethdev: fix shallow copy of flow API RSS action The rss_conf field is defined as a pointer to struct rte_eth_rss_conf. Even assuming it is permanently allocated and a pointer copy is safe, pointed data may change and not reflect an applied flow rule anymore. This patch aligns with testpmd by making a deep copy instead. Fixes: 18da437b5f63 ("ethdev: add flow rule copy function") Cc: stable@dpdk.org Signed-off-by: Adrien Mazarguil Acked-by: Nelio Laranjeiro Acked-by: Ferruh Yigit --- diff --git a/lib/librte_ether/rte_flow.c b/lib/librte_ether/rte_flow.c index a3823d874c..ada2808102 100644 --- a/lib/librte_ether/rte_flow.c +++ b/lib/librte_ether/rte_flow.c @@ -255,60 +255,119 @@ rte_flow_error_set(struct rte_flow_error *error, return -code; } -/** Compute storage space needed by item specification. */ -static void -flow_item_spec_size(const struct rte_flow_item *item, - size_t *size, size_t *pad) +/** Pattern item specification types. */ +enum item_spec_type { + ITEM_SPEC, + ITEM_LAST, + ITEM_MASK, +}; + +/** Compute storage space needed by item specification and copy it. */ +static size_t +flow_item_spec_copy(void *buf, const struct rte_flow_item *item, + enum item_spec_type type) { - if (!item->spec) { - *size = 0; + size_t size = 0; + const void *item_spec = + type == ITEM_SPEC ? item->spec : + type == ITEM_LAST ? item->last : + type == ITEM_MASK ? item->mask : + NULL; + + if (!item_spec) goto empty; - } switch (item->type) { union { const struct rte_flow_item_raw *raw; - } spec; + } src; + union { + struct rte_flow_item_raw *raw; + } dst; - /* Not a fall-through */ case RTE_FLOW_ITEM_TYPE_RAW: - spec.raw = item->spec; - *size = offsetof(struct rte_flow_item_raw, pattern) + - spec.raw->length * sizeof(*spec.raw->pattern); + src.raw = item_spec; + dst.raw = buf; + size = offsetof(struct rte_flow_item_raw, pattern) + + src.raw->length * sizeof(*src.raw->pattern); + if (dst.raw) + memcpy(dst.raw, src.raw, size); break; default: - *size = rte_flow_desc_item[item->type].size; + size = rte_flow_desc_item[item->type].size; + if (buf) + memcpy(buf, item_spec, size); break; } empty: - *pad = RTE_ALIGN_CEIL(*size, sizeof(double)) - *size; + return RTE_ALIGN_CEIL(size, sizeof(double)); } -/** Compute storage space needed by action configuration. */ -static void -flow_action_conf_size(const struct rte_flow_action *action, - size_t *size, size_t *pad) +/** Compute storage space needed by action configuration and copy it. */ +static size_t +flow_action_conf_copy(void *buf, const struct rte_flow_action *action) { - if (!action->conf) { - *size = 0; + size_t size = 0; + + if (!action->conf) goto empty; - } switch (action->type) { union { const struct rte_flow_action_rss *rss; - } conf; + } src; + union { + struct rte_flow_action_rss *rss; + } dst; + size_t off; - /* Not a fall-through. */ case RTE_FLOW_ACTION_TYPE_RSS: - conf.rss = action->conf; - *size = offsetof(struct rte_flow_action_rss, queue) + - conf.rss->num * sizeof(*conf.rss->queue); + src.rss = action->conf; + dst.rss = buf; + off = 0; + if (dst.rss) + *dst.rss = (struct rte_flow_action_rss){ + .num = src.rss->num, + }; + off += offsetof(struct rte_flow_action_rss, queue); + if (src.rss->num) { + size = sizeof(*src.rss->queue) * src.rss->num; + if (dst.rss) + memcpy(dst.rss->queue, src.rss->queue, size); + off += size; + } + off = RTE_ALIGN_CEIL(off, sizeof(double)); + if (dst.rss) { + dst.rss->rss_conf = (void *)((uintptr_t)dst.rss + off); + *(struct rte_eth_rss_conf *)(uintptr_t) + dst.rss->rss_conf = (struct rte_eth_rss_conf){ + .rss_key_len = src.rss->rss_conf->rss_key_len, + .rss_hf = src.rss->rss_conf->rss_hf, + }; + } + off += sizeof(*src.rss->rss_conf); + if (src.rss->rss_conf->rss_key_len) { + off = RTE_ALIGN_CEIL(off, sizeof(double)); + size = sizeof(*src.rss->rss_conf->rss_key) * + src.rss->rss_conf->rss_key_len; + if (dst.rss) { + ((struct rte_eth_rss_conf *)(uintptr_t) + dst.rss->rss_conf)->rss_key = + (void *)((uintptr_t)dst.rss + off); + memcpy(dst.rss->rss_conf->rss_key, + src.rss->rss_conf->rss_key, + size); + } + off += size; + } + size = off; break; default: - *size = rte_flow_desc_action[action->type].size; + size = rte_flow_desc_action[action->type].size; + if (buf) + memcpy(buf, action->conf, size); break; } empty: - *pad = RTE_ALIGN_CEIL(*size, sizeof(double)) - *size; + return RTE_ALIGN_CEIL(size, sizeof(double)); } /** Store a full rte_flow description. */ @@ -320,7 +379,6 @@ rte_flow_copy(struct rte_flow_desc *desc, size_t len, { struct rte_flow_desc *fd = NULL; size_t tmp; - size_t pad; size_t off1 = 0; size_t off2 = 0; size_t size = 0; @@ -345,24 +403,26 @@ store: dst = memcpy(fd->data + off1, item, sizeof(*item)); off1 += sizeof(*item); - flow_item_spec_size(item, &tmp, &pad); if (item->spec) { if (fd) - dst->spec = memcpy(fd->data + off2, - item->spec, tmp); - off2 += tmp + pad; + dst->spec = fd->data + off2; + off2 += flow_item_spec_copy + (fd ? fd->data + off2 : NULL, item, + ITEM_SPEC); } if (item->last) { if (fd) - dst->last = memcpy(fd->data + off2, - item->last, tmp); - off2 += tmp + pad; + dst->last = fd->data + off2; + off2 += flow_item_spec_copy + (fd ? fd->data + off2 : NULL, item, + ITEM_LAST); } if (item->mask) { if (fd) - dst->mask = memcpy(fd->data + off2, - item->mask, tmp); - off2 += tmp + pad; + dst->mask = fd->data + off2; + off2 += flow_item_spec_copy + (fd ? fd->data + off2 : NULL, item, + ITEM_MASK); } off2 = RTE_ALIGN_CEIL(off2, sizeof(double)); } while ((item++)->type != RTE_FLOW_ITEM_TYPE_END); @@ -387,12 +447,11 @@ store: dst = memcpy(fd->data + off1, action, sizeof(*action)); off1 += sizeof(*action); - flow_action_conf_size(action, &tmp, &pad); if (action->conf) { if (fd) - dst->conf = memcpy(fd->data + off2, - action->conf, tmp); - off2 += tmp + pad; + dst->conf = fd->data + off2; + off2 += flow_action_conf_copy + (fd ? fd->data + off2 : NULL, action); } off2 = RTE_ALIGN_CEIL(off2, sizeof(double)); } while ((action++)->type != RTE_FLOW_ACTION_TYPE_END);