[B.A.T.M.A.N.] [RFC 2/2] batman-adv: Return error codes instead of -1 on failures

Signed-off-by: Sven Eckelmann sven@narfation.org --- bat_sysfs.c | 2 +- bridge_loop_avoidance.c | 6 +++--- main.c | 27 ++++++++++++++++----------- originator.c | 18 +++++++++--------- translation-table.c | 24 ++++++++++++++---------- vis.c | 8 ++++---- 6 files changed, 47 insertions(+), 38 deletions(-)

diff --git a/bat_sysfs.c b/bat_sysfs.c index acb2640..6ba3d89 100644 --- a/bat_sysfs.c +++ b/bat_sysfs.c @@ -680,7 +680,7 @@ void sysfs_del_hardif(struct kobject **hardif_obj) int throw_uevent(struct bat_priv *bat_priv, enum uev_type type, enum uev_action action, const char *data) { - int ret = -1; + int ret = -ENOMEM; struct hard_iface *primary_if = NULL; struct kobject *bat_kobj; char *uevent_env[4] = { NULL, NULL, NULL, NULL }; diff --git a/bridge_loop_avoidance.c b/bridge_loop_avoidance.c index 8bb274b..6d33140 100644 --- a/bridge_loop_avoidance.c +++ b/bridge_loop_avoidance.c @@ -1164,7 +1164,7 @@ int bla_init(struct bat_priv *bat_priv) bat_priv->bcast_duplist_curr = 0;

if (bat_priv->claim_hash) - return 1; + return 0;

bat_priv->claim_hash = hash_new(128); bat_priv->backbone_hash = hash_new(32); @@ -1174,12 +1174,12 @@ int bla_init(struct bat_priv *bat_priv) &backbone_hash_lock_class_key);

if (!bat_priv->claim_hash || !bat_priv->backbone_hash) - return -1; + return -ENOMEM;

bat_dbg(DBG_BLA, bat_priv, "bla hashes initialized\n");

bla_start_timer(bat_priv); - return 1; + return 0; }

/** diff --git a/main.c b/main.c index 79dd604..43c1753 100644 --- a/main.c +++ b/main.c @@ -92,6 +92,7 @@ static void __exit batman_exit(void) int mesh_init(struct net_device *soft_iface) { struct bat_priv *bat_priv = netdev_priv(soft_iface); + int ret;

spin_lock_init(&bat_priv->forw_bat_list_lock); spin_lock_init(&bat_priv->forw_bcast_list_lock); @@ -110,30 +111,32 @@ int mesh_init(struct net_device *soft_iface) INIT_LIST_HEAD(&bat_priv->tt_req_list); INIT_LIST_HEAD(&bat_priv->tt_roam_list);

- if (originator_init(bat_priv) < 1) + ret = originator_init(bat_priv); + if (ret < 0) goto err;

- if (tt_init(bat_priv) < 1) + ret = tt_init(bat_priv); + if (ret < 0) goto err;

tt_local_add(soft_iface, soft_iface->dev_addr, NULL_IFINDEX);

- if (vis_init(bat_priv) < 1) + ret = vis_init(bat_priv); + if (ret < 0) goto err;

- if (bla_init(bat_priv) < 1) + ret = bla_init(bat_priv); + if (ret < 0) goto err;

atomic_set(&bat_priv->gw_reselect, 0); atomic_set(&bat_priv->mesh_state, MESH_ACTIVE); - goto end; + + return 0;

err: mesh_free(soft_iface); - return -1; - -end: - return 0; + return ret; }

void mesh_free(struct net_device *soft_iface) @@ -321,12 +324,13 @@ static struct bat_algo_ops *bat_algo_get(char *name) int bat_algo_register(struct bat_algo_ops *bat_algo_ops) { struct bat_algo_ops *bat_algo_ops_tmp; - int ret = -1; + int ret;

bat_algo_ops_tmp = bat_algo_get(bat_algo_ops->name); if (bat_algo_ops_tmp) { pr_info("Trying to register already registered routing algorithm: %s\n", bat_algo_ops->name); + ret = EEXIST; goto out; }

@@ -339,6 +343,7 @@ int bat_algo_register(struct bat_algo_ops *bat_algo_ops) !bat_algo_ops->bat_ogm_emit) { pr_info("Routing algo '%s' does not implement required ops\n", bat_algo_ops->name); + ret = EINVAL; goto out; }

@@ -353,7 +358,7 @@ out: int bat_algo_select(struct bat_priv *bat_priv, char *name) { struct bat_algo_ops *bat_algo_ops; - int ret = -1; + int ret = -EINVAL;

bat_algo_ops = bat_algo_get(name); if (!bat_algo_ops) diff --git a/originator.c b/originator.c index 30889c9..61e091d 100644 --- a/originator.c +++ b/originator.c @@ -51,7 +51,7 @@ static int compare_orig(const struct hlist_node *node, const void *data2) int originator_init(struct bat_priv *bat_priv) { if (bat_priv->orig_hash) - return 1; + return 0;

bat_priv->orig_hash = hash_new(1024);

@@ -59,10 +59,10 @@ int originator_init(struct bat_priv *bat_priv) goto err;

start_purge_timer(bat_priv); - return 1; + return 0;

err: - return 0; + return -ENOMEM; }

void neigh_node_free_ref(struct neigh_node *neigh_node) @@ -489,7 +489,7 @@ static int orig_node_add_if(struct orig_node *orig_node, int max_if_num) data_ptr = kmalloc(max_if_num * sizeof(unsigned long) * NUM_WORDS, GFP_ATOMIC); if (!data_ptr) - return -1; + return -ENOMEM;

memcpy(data_ptr, orig_node->bcast_own, (max_if_num - 1) * sizeof(unsigned long) * NUM_WORDS); @@ -498,7 +498,7 @@ static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)

data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); if (!data_ptr) - return -1; + return -ENOMEM;

memcpy(data_ptr, orig_node->bcast_own_sum, (max_if_num - 1) * sizeof(uint8_t)); @@ -529,7 +529,7 @@ int orig_hash_add_if(struct hard_iface *hard_iface, int max_if_num) ret = orig_node_add_if(orig_node, max_if_num); spin_unlock_bh(&orig_node->ogm_cnt_lock);

- if (ret == -1) + if (ret == -ENOMEM) goto err; } rcu_read_unlock(); @@ -555,7 +555,7 @@ static int orig_node_del_if(struct orig_node *orig_node, chunk_size = sizeof(unsigned long) * NUM_WORDS; data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC); if (!data_ptr) - return -1; + return -ENOMEM;

/* copy first part */ memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size); @@ -574,7 +574,7 @@ free_bcast_own:

data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); if (!data_ptr) - return -1; + return -ENOMEM;

memcpy(data_ptr, orig_node->bcast_own_sum, del_if_num * sizeof(uint8_t)); @@ -613,7 +613,7 @@ int orig_hash_del_if(struct hard_iface *hard_iface, int max_if_num) hard_iface->if_num); spin_unlock_bh(&orig_node->ogm_cnt_lock);

- if (ret == -1) + if (ret == -ENOMEM) goto err; } rcu_read_unlock(); diff --git a/translation-table.c b/translation-table.c index c3b7773..5bb2dcf 100644 --- a/translation-table.c +++ b/translation-table.c @@ -181,14 +181,14 @@ int tt_len(int changes_num) static int tt_local_init(struct bat_priv *bat_priv) { if (bat_priv->tt_local_hash) - return 1; + return 0;

bat_priv->tt_local_hash = hash_new(1024);

if (!bat_priv->tt_local_hash) - return 0; + return -ENOMEM;

- return 1; + return 0; }

void tt_local_add(struct net_device *soft_iface, const uint8_t *addr, @@ -491,14 +491,14 @@ static void tt_local_table_free(struct bat_priv *bat_priv) static int tt_global_init(struct bat_priv *bat_priv) { if (bat_priv->tt_global_hash) - return 1; + return 0;

bat_priv->tt_global_hash = hash_new(1024);

if (!bat_priv->tt_global_hash) - return 0; + return -ENOMEM;

- return 1; + return 0; }

static void tt_changes_list_free(struct bat_priv *bat_priv) @@ -1773,12 +1773,16 @@ out:

int tt_init(struct bat_priv *bat_priv) { - if (!tt_local_init(bat_priv)) - return 0; + int ret;

- if (!tt_global_init(bat_priv)) { + ret = tt_local_init(bat_priv); + if (ret < 0) + return ret; + + ret = tt_global_init(bat_priv); + if (ret < 0) { tt_local_table_free(bat_priv); - return 0; + return ret; }

tt_start_timer(bat_priv); diff --git a/vis.c b/vis.c index cec216f..411c0e1 100644 --- a/vis.c +++ b/vis.c @@ -626,7 +626,7 @@ static int generate_vis_packet(struct bat_priv *bat_priv) best_tq = find_best_vis_server(bat_priv, info);

if (best_tq < 0) - return -1; + return best_tq; }

for (i = 0; i < hash->size; i++) { @@ -878,7 +878,7 @@ int vis_init(struct bat_priv *bat_priv) int hash_added;

if (bat_priv->vis_hash) - return 1; + return 0;

spin_lock_bh(&bat_priv->vis_hash_lock);

@@ -929,7 +929,7 @@ int vis_init(struct bat_priv *bat_priv)

spin_unlock_bh(&bat_priv->vis_hash_lock); start_vis_timer(bat_priv); - return 1; + return 0;

free_info: kfree(bat_priv->my_vis_info); @@ -937,7 +937,7 @@ free_info: err: spin_unlock_bh(&bat_priv->vis_hash_lock); vis_quit(bat_priv); - return 0; + return -ENOMEM; }

/* Decrease the reference count on a hash item info */