diff options
Diffstat (limited to 'net/ipv6/netfilter/ip6_tables.c')
| -rw-r--r-- | net/ipv6/netfilter/ip6_tables.c | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c index d0b5fa6661f..02be4fcb915 100644 --- a/net/ipv6/netfilter/ip6_tables.c +++ b/net/ipv6/netfilter/ip6_tables.c @@ -943,17 +943,11 @@ get_counters(const struct xt_table_info *t, } } -static int -copy_entries_to_user(unsigned int total_size, - struct xt_table *table, - void __user *userptr) +static inline struct xt_counters *alloc_counters(struct xt_table *table) { - unsigned int off, num, countersize; - struct ip6t_entry *e; + unsigned int countersize; struct xt_counters *counters; struct xt_table_info *private = table->private; - int ret = 0; - void *loc_cpu_entry; /* We need atomic snapshot of counters: rest doesn't change (other than comefrom, which userspace doesn't care @@ -962,13 +956,32 @@ copy_entries_to_user(unsigned int total_size, counters = vmalloc_node(countersize, numa_node_id()); if (counters == NULL) - return -ENOMEM; + return ERR_PTR(-ENOMEM); /* First, sum counters... */ write_lock_bh(&table->lock); get_counters(private, counters); write_unlock_bh(&table->lock); + return counters; +} + +static int +copy_entries_to_user(unsigned int total_size, + struct xt_table *table, + void __user *userptr) +{ + unsigned int off, num; + struct ip6t_entry *e; + struct xt_counters *counters; + struct xt_table_info *private = table->private; + int ret = 0; + void *loc_cpu_entry; + + counters = alloc_counters(table); + if (IS_ERR(counters)) + return PTR_ERR(counters); + /* choose the copy that is on ourc node/cpu */ loc_cpu_entry = private->entries[raw_smp_processor_id()]; if (copy_to_user(userptr, loc_cpu_entry, total_size) != 0) { |