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Subject[PATCH 01/16] drbd: Consider all crypto options in connect and in net-options
Date
So for this was simply not considered after the options have been
re-arranged.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
---
drivers/block/drbd/drbd_nl.c | 230 ++++++++++++++++++++++--------------------
1 files changed, 121 insertions(+), 109 deletions(-)

diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index caa32e2..b9e8456 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1758,6 +1758,88 @@ check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf)
return rv;
}

+struct crypto {
+ struct crypto_hash *verify_tfm;
+ struct crypto_hash *csums_tfm;
+ struct crypto_hash *cram_hmac_tfm;
+ struct crypto_hash *integrity_w_tfm;
+ struct crypto_hash *integrity_r_tfm;
+ void *int_dig_in;
+ void *int_dig_vv;
+};
+
+static int
+alloc_tfm(struct crypto_hash **tfm, char *tfm_name, int err_alg, int err_nd)
+{
+ if (!tfm_name[0])
+ return NO_ERROR;
+
+ *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(*tfm)) {
+ *tfm = NULL;
+ return err_alg;
+ }
+
+ if (!drbd_crypto_is_hash(crypto_hash_tfm(*tfm)))
+ return err_nd;
+
+ return NO_ERROR;
+}
+
+static enum drbd_ret_code
+alloc_crypto(struct crypto *crypto, struct net_conf *new_conf)
+{
+ char hmac_name[CRYPTO_MAX_ALG_NAME];
+ enum drbd_ret_code rv;
+ int hash_size;
+
+ rv = alloc_tfm(&crypto->csums_tfm, new_conf->csums_alg,
+ ERR_CSUMS_ALG, ERR_CSUMS_ALG_ND);
+ if (rv != NO_ERROR)
+ return rv;
+ rv = alloc_tfm(&crypto->verify_tfm, new_conf->verify_alg,
+ ERR_VERIFY_ALG, ERR_VERIFY_ALG_ND);
+ if (rv != NO_ERROR)
+ return rv;
+ rv = alloc_tfm(&crypto->integrity_w_tfm, new_conf->integrity_alg,
+ ERR_INTEGRITY_ALG, ERR_INTEGRITY_ALG_ND);
+ if (rv != NO_ERROR)
+ return rv;
+ rv = alloc_tfm(&crypto->integrity_r_tfm, new_conf->integrity_alg,
+ ERR_INTEGRITY_ALG, ERR_INTEGRITY_ALG_ND);
+ if (rv != NO_ERROR)
+ return rv;
+ if (new_conf->cram_hmac_alg[0] != 0) {
+ snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
+ new_conf->cram_hmac_alg);
+
+ rv = alloc_tfm(&crypto->cram_hmac_tfm, hmac_name,
+ ERR_AUTH_ALG, ERR_AUTH_ALG_ND);
+ }
+ if (crypto->integrity_w_tfm) {
+ hash_size = crypto_hash_digestsize(crypto->integrity_w_tfm);
+ crypto->int_dig_in = kmalloc(hash_size, GFP_KERNEL);
+ if (!crypto->int_dig_in)
+ return ERR_NOMEM;
+ crypto->int_dig_vv = kmalloc(hash_size, GFP_KERNEL);
+ if (!crypto->int_dig_vv)
+ return ERR_NOMEM;
+ }
+
+ return rv;
+}
+
+static void free_crypto(struct crypto *crypto)
+{
+ kfree(crypto->int_dig_in);
+ kfree(crypto->int_dig_vv);
+ crypto_free_hash(crypto->cram_hmac_tfm);
+ crypto_free_hash(crypto->integrity_w_tfm);
+ crypto_free_hash(crypto->integrity_r_tfm);
+ crypto_free_hash(crypto->csums_tfm);
+ crypto_free_hash(crypto->verify_tfm);
+}
+
int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
{
enum drbd_ret_code retcode;
@@ -1766,9 +1848,7 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
int err;
int ovr; /* online verify running */
int rsr; /* re-sync running */
- struct crypto_hash *verify_tfm = NULL;
- struct crypto_hash *csums_tfm = NULL;
-
+ struct crypto crypto = { };

retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN);
if (!adm_ctx.reply_skb)
@@ -1824,61 +1904,49 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)

/* re-sync running */
rsr = conn_resync_running(tconn);
- if (rsr && old_conf && strcmp(new_conf->csums_alg, old_conf->csums_alg)) {
+ if (rsr && strcmp(new_conf->csums_alg, old_conf->csums_alg)) {
retcode = ERR_CSUMS_RESYNC_RUNNING;
goto fail;
}

- if (!rsr && new_conf->csums_alg[0]) {
- csums_tfm = crypto_alloc_hash(new_conf->csums_alg, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(csums_tfm)) {
- csums_tfm = NULL;
- retcode = ERR_CSUMS_ALG;
- goto fail;
- }
-
- if (!drbd_crypto_is_hash(crypto_hash_tfm(csums_tfm))) {
- retcode = ERR_CSUMS_ALG_ND;
- goto fail;
- }
- }
-
/* online verify running */
ovr = conn_ov_running(tconn);
- if (ovr) {
- if (strcmp(new_conf->verify_alg, old_conf->verify_alg)) {
- retcode = ERR_VERIFY_RUNNING;
- goto fail;
- }
+ if (ovr && strcmp(new_conf->verify_alg, old_conf->verify_alg)) {
+ retcode = ERR_VERIFY_RUNNING;
+ goto fail;
}

- if (!ovr && new_conf->verify_alg[0]) {
- verify_tfm = crypto_alloc_hash(new_conf->verify_alg, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(verify_tfm)) {
- verify_tfm = NULL;
- retcode = ERR_VERIFY_ALG;
- goto fail;
- }
-
- if (!drbd_crypto_is_hash(crypto_hash_tfm(verify_tfm))) {
- retcode = ERR_VERIFY_ALG_ND;
- goto fail;
- }
- }
+ retcode = alloc_crypto(&crypto, new_conf);
+ if (retcode != NO_ERROR)
+ goto fail;

rcu_assign_pointer(tconn->net_conf, new_conf);

if (!rsr) {
crypto_free_hash(tconn->csums_tfm);
- tconn->csums_tfm = csums_tfm;
- csums_tfm = NULL;
+ tconn->csums_tfm = crypto.csums_tfm;
+ crypto.csums_tfm = NULL;
}
if (!ovr) {
crypto_free_hash(tconn->verify_tfm);
- tconn->verify_tfm = verify_tfm;
- verify_tfm = NULL;
+ tconn->verify_tfm = crypto.verify_tfm;
+ crypto.verify_tfm = NULL;
}

+ /* FIXME can not assign these so bluntly while we have ongoing IO */
+ kfree(tconn->int_dig_in);
+ tconn->int_dig_in = crypto.int_dig_in;
+ kfree(tconn->int_dig_vv);
+ tconn->int_dig_vv = crypto.int_dig_vv;
+ crypto_free_hash(tconn->integrity_w_tfm);
+ tconn->integrity_w_tfm = crypto.integrity_w_tfm;
+ crypto_free_hash(tconn->integrity_r_tfm);
+ tconn->integrity_r_tfm = crypto.integrity_r_tfm;
+
+ /* FIXME Changing cram_hmac while the connection is established is useless */
+ crypto_free_hash(tconn->cram_hmac_tfm);
+ tconn->cram_hmac_tfm = crypto.cram_hmac_tfm;
+
mutex_unlock(&tconn->net_conf_update);
synchronize_rcu();
kfree(old_conf);
@@ -1890,8 +1958,7 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)

fail:
mutex_unlock(&tconn->net_conf_update);
- crypto_free_hash(csums_tfm);
- crypto_free_hash(verify_tfm);
+ free_crypto(&crypto);
kfree(new_conf);
done:
conn_reconfig_done(tconn);
@@ -1902,14 +1969,9 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)

int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
{
- char hmac_name[CRYPTO_MAX_ALG_NAME];
struct drbd_conf *mdev;
struct net_conf *old_conf, *new_conf = NULL;
- struct crypto_hash *tfm = NULL;
- struct crypto_hash *integrity_w_tfm = NULL;
- struct crypto_hash *integrity_r_tfm = NULL;
- void *int_dig_in = NULL;
- void *int_dig_vv = NULL;
+ struct crypto crypto = { };
struct drbd_tconn *oconn;
struct drbd_tconn *tconn;
struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr;
@@ -2014,60 +2076,12 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
goto fail;
}

- if (new_conf->cram_hmac_alg[0] != 0) {
- snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
- new_conf->cram_hmac_alg);
- tfm = crypto_alloc_hash(hmac_name, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(tfm)) {
- tfm = NULL;
- retcode = ERR_AUTH_ALG;
- goto fail;
- }
-
- if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm))) {
- retcode = ERR_AUTH_ALG_ND;
- goto fail;
- }
- }
-
- if (new_conf->integrity_alg[0]) {
- integrity_w_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(integrity_w_tfm)) {
- integrity_w_tfm = NULL;
- retcode=ERR_INTEGRITY_ALG;
- goto fail;
- }
-
- if (!drbd_crypto_is_hash(crypto_hash_tfm(integrity_w_tfm))) {
- retcode=ERR_INTEGRITY_ALG_ND;
- goto fail;
- }
-
- integrity_r_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(integrity_r_tfm)) {
- integrity_r_tfm = NULL;
- retcode=ERR_INTEGRITY_ALG;
- goto fail;
- }
- }
+ retcode = alloc_crypto(&crypto, new_conf);
+ if (retcode != NO_ERROR)
+ goto fail;

((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0;

- /* allocation not in the IO path, cqueue thread context */
- if (integrity_w_tfm) {
- i = crypto_hash_digestsize(integrity_w_tfm);
- int_dig_in = kmalloc(i, GFP_KERNEL);
- if (!int_dig_in) {
- retcode = ERR_NOMEM;
- goto fail;
- }
- int_dig_vv = kmalloc(i, GFP_KERNEL);
- if (!int_dig_vv) {
- retcode = ERR_NOMEM;
- goto fail;
- }
- }
-
conn_flush_workqueue(tconn);

mutex_lock(&tconn->net_conf_update);
@@ -2080,11 +2094,13 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
rcu_assign_pointer(tconn->net_conf, new_conf);

conn_free_crypto(tconn);
- tconn->cram_hmac_tfm = tfm;
- tconn->integrity_w_tfm = integrity_w_tfm;
- tconn->integrity_r_tfm = integrity_r_tfm;
- tconn->int_dig_in = int_dig_in;
- tconn->int_dig_vv = int_dig_vv;
+ tconn->int_dig_in = crypto.int_dig_in;
+ tconn->int_dig_vv = crypto.int_dig_vv;
+ tconn->cram_hmac_tfm = crypto.cram_hmac_tfm;
+ tconn->integrity_w_tfm = crypto.integrity_w_tfm;
+ tconn->integrity_r_tfm = crypto.integrity_r_tfm;
+ tconn->csums_tfm = crypto.csums_tfm;
+ tconn->verify_tfm = crypto.verify_tfm;

mutex_unlock(&tconn->net_conf_update);

@@ -2102,11 +2118,7 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
return 0;

fail:
- kfree(int_dig_in);
- kfree(int_dig_vv);
- crypto_free_hash(tfm);
- crypto_free_hash(integrity_w_tfm);
- crypto_free_hash(integrity_r_tfm);
+ free_crypto(&crypto);
kfree(new_conf);

conn_reconfig_done(tconn);
--
1.7.4.1


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