When the translation tables (global and local) are written for debugfs, it is not neccesary to allocate a buffer, we can directly use seq_printf() to print them out.

This might actually be safer if the table changes between size calculation and traversal, and we can't estimate the required size wrong.

Signed-off-by: Simon Wunderlich siwu@hrz.tu-chemnitz.de --- translation-table.c | 57 +------------------------------------------------- 1 files changed, 2 insertions(+), 55 deletions(-)

diff --git a/translation-table.c b/translation-table.c index c2af2b1..fadbc05 100644 --- a/translation-table.c +++ b/translation-table.c @@ -302,8 +302,6 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset) struct hard_iface *primary_if; struct hlist_node *node; struct hlist_head *head; - size_t buf_size, pos; - char *buff; uint32_t i; int ret = 0;

@@ -326,34 +324,13 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset) "announced via TT (TTVN: %u):\n", net_dev->name, (uint8_t)atomic_read(&bat_priv->ttvn));

- buf_size = 1; - /* Estimate length for: " * xx:xx:xx:xx:xx:xx\n" */ - for (i = 0; i < hash->size; i++) { - head = &hash->table[i]; - - rcu_read_lock(); - __hlist_for_each_rcu(node, head) - buf_size += 29; - rcu_read_unlock(); - } - - buff = kmalloc(buf_size, GFP_ATOMIC); - if (!buff) { - ret = -ENOMEM; - goto out; - } - - buff[0] = '\0'; - pos = 0; - for (i = 0; i < hash->size; i++) { head = &hash->table[i];

rcu_read_lock(); hlist_for_each_entry_rcu(tt_local_entry, node, head, hash_entry) { - pos += snprintf(buff + pos, 30, " * %pM " - "[%c%c%c%c%c]\n", + seq_printf(seq, " * %pM [%c%c%c%c%c]\n", tt_local_entry->addr, (tt_local_entry->flags & TT_CLIENT_ROAM ? 'R' : '.'), @@ -368,9 +345,6 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset) } rcu_read_unlock(); } - - seq_printf(seq, "%s", buff); - kfree(buff); out: if (primary_if) hardif_free_ref(primary_if); @@ -579,8 +553,6 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset) struct hard_iface *primary_if; struct hlist_node *node; struct hlist_head *head; - size_t buf_size, pos; - char *buff; uint32_t i; int ret = 0;

@@ -605,35 +577,13 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset) seq_printf(seq, " %-13s %s %-15s %s %s\n", "Client", "(TTVN)", "Originator", "(Curr TTVN)", "Flags");

- buf_size = 1; - /* Estimate length for: " * xx:xx:xx:xx:xx:xx (ttvn) via - * xx:xx:xx:xx:xx:xx (cur_ttvn)\n"*/ - for (i = 0; i < hash->size; i++) { - head = &hash->table[i]; - - rcu_read_lock(); - __hlist_for_each_rcu(node, head) - buf_size += 67; - rcu_read_unlock(); - } - - buff = kmalloc(buf_size, GFP_ATOMIC); - if (!buff) { - ret = -ENOMEM; - goto out; - } - - buff[0] = '\0'; - pos = 0; - for (i = 0; i < hash->size; i++) { head = &hash->table[i];

rcu_read_lock(); hlist_for_each_entry_rcu(tt_global_entry, node, head, hash_entry) { - pos += snprintf(buff + pos, 69, - " * %pM (%3u) via %pM (%3u) " + seq_printf(seq, " * %pM (%3u) via %pM (%3u) " "[%c%c%c]\n", tt_global_entry->addr, tt_global_entry->ttvn, tt_global_entry->orig_node->orig, @@ -649,9 +599,6 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset) } rcu_read_unlock(); } - - seq_printf(seq, "%s", buff); - kfree(buff); out: if (primary_if) hardif_free_ref(primary_if);