drbd: receive_protocol(): We cannot change our own data-integrity-alg setting here
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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@ -3002,7 +3002,7 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
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int p_proto, p_discard_my_data, p_two_primaries, cf;
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int p_proto, p_discard_my_data, p_two_primaries, cf;
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struct net_conf *nc, *old_net_conf, *new_net_conf = NULL;
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struct net_conf *nc, *old_net_conf, *new_net_conf = NULL;
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char integrity_alg[SHARED_SECRET_MAX] = "";
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char integrity_alg[SHARED_SECRET_MAX] = "";
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struct crypto_hash *peer_integrity_tfm = NULL, *integrity_tfm = NULL;
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struct crypto_hash *peer_integrity_tfm = NULL;
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void *int_dig_in = NULL, *int_dig_vv = NULL;
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void *int_dig_in = NULL, *int_dig_vv = NULL;
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p_proto = be32_to_cpu(p->protocol);
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p_proto = be32_to_cpu(p->protocol);
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@ -3028,15 +3028,23 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
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if (integrity_alg[0]) {
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if (integrity_alg[0]) {
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int hash_size;
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int hash_size;
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/*
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* We can only change the peer data integrity algorithm
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* here. Changing our own data integrity algorithm
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* requires that we send a P_PROTOCOL_UPDATE packet at
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* the same time; otherwise, the peer has no way to
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* tell between which packets the algorithm should
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* change.
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*/
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peer_integrity_tfm = crypto_alloc_hash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
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peer_integrity_tfm = crypto_alloc_hash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
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integrity_tfm = crypto_alloc_hash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
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if (!peer_integrity_tfm) {
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if (!(peer_integrity_tfm && integrity_tfm)) {
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conn_err(tconn, "peer data-integrity-alg %s not supported\n",
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conn_err(tconn, "peer data-integrity-alg %s not supported\n",
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integrity_alg);
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integrity_alg);
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goto disconnect;
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goto disconnect;
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}
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}
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hash_size = crypto_hash_digestsize(integrity_tfm);
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hash_size = crypto_hash_digestsize(peer_integrity_tfm);
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int_dig_in = kmalloc(hash_size, GFP_KERNEL);
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int_dig_in = kmalloc(hash_size, GFP_KERNEL);
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int_dig_vv = kmalloc(hash_size, GFP_KERNEL);
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int_dig_vv = kmalloc(hash_size, GFP_KERNEL);
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if (!(int_dig_in && int_dig_vv)) {
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if (!(int_dig_in && int_dig_vv)) {
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@ -3064,9 +3072,6 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
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strcpy(new_net_conf->integrity_alg, integrity_alg);
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strcpy(new_net_conf->integrity_alg, integrity_alg);
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new_net_conf->integrity_alg_len = strlen(integrity_alg) + 1;
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new_net_conf->integrity_alg_len = strlen(integrity_alg) + 1;
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crypto_free_hash(tconn->integrity_tfm);
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tconn->integrity_tfm = integrity_tfm;
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rcu_assign_pointer(tconn->net_conf, new_net_conf);
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rcu_assign_pointer(tconn->net_conf, new_net_conf);
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mutex_unlock(&tconn->conf_update);
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mutex_unlock(&tconn->conf_update);
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mutex_unlock(&tconn->data.mutex);
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mutex_unlock(&tconn->data.mutex);
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@ -3079,7 +3084,8 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
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tconn->int_dig_vv = int_dig_vv;
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tconn->int_dig_vv = int_dig_vv;
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if (strcmp(old_net_conf->integrity_alg, integrity_alg))
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if (strcmp(old_net_conf->integrity_alg, integrity_alg))
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conn_info(tconn, "peer data-integrity-alg: %s\n", integrity_alg);
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conn_info(tconn, "peer data-integrity-alg: %s\n",
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integrity_alg[0] ? integrity_alg : "(none)");
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synchronize_rcu();
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synchronize_rcu();
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kfree(old_net_conf);
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kfree(old_net_conf);
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@ -3135,7 +3141,6 @@ disconnect_rcu_unlock:
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rcu_read_unlock();
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rcu_read_unlock();
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disconnect:
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disconnect:
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crypto_free_hash(peer_integrity_tfm);
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crypto_free_hash(peer_integrity_tfm);
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crypto_free_hash(integrity_tfm);
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kfree(int_dig_in);
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kfree(int_dig_in);
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kfree(int_dig_vv);
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kfree(int_dig_vv);
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conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
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conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
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