diff options
| -rw-r--r-- | net/netfilter/nf_log.c | 85 |
1 files changed, 84 insertions, 1 deletions
diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c index 4fcbcc71aa32..8bb998fe098b 100644 --- a/net/netfilter/nf_log.c +++ b/net/netfilter/nf_log.c @@ -14,6 +14,7 @@ LOG target modules */ #define NF_LOG_PREFIXLEN 128 +#define NFLOGGER_NAME_LEN 64 static const struct nf_logger *nf_loggers[NFPROTO_NUMPROTO] __read_mostly; static struct list_head nf_loggers_l[NFPROTO_NUMPROTO] __read_mostly; @@ -207,18 +208,100 @@ static const struct file_operations nflog_file_ops = { .release = seq_release, }; + #endif /* PROC_FS */ +#ifdef CONFIG_SYSCTL +struct ctl_path nf_log_sysctl_path[] = { + { .procname = "net", .ctl_name = CTL_NET, }, + { .procname = "netfilter", .ctl_name = NET_NETFILTER, }, + { .procname = "nf_log", .ctl_name = CTL_UNNUMBERED, }, + { } +}; + +static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3]; +static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1]; +static struct ctl_table_header *nf_log_dir_header; -int __init netfilter_log_init(void) +static int nf_log_proc_dostring(ctl_table *table, int write, struct file *filp, + void *buffer, size_t *lenp, loff_t *ppos) +{ + const struct nf_logger *logger; + int r = 0; + int tindex = (unsigned long)table->extra1; + + if (write) { + if (!strcmp(buffer, "NONE")) { + nf_log_unbind_pf(tindex); + return 0; + } + mutex_lock(&nf_log_mutex); + logger = __find_logger(tindex, buffer); + if (logger == NULL) { + mutex_unlock(&nf_log_mutex); + return -ENOENT; + } + rcu_assign_pointer(nf_loggers[tindex], logger); + mutex_unlock(&nf_log_mutex); + } else { + rcu_read_lock(); + logger = rcu_dereference(nf_loggers[tindex]); + if (!logger) + table->data = "NONE"; + else + table->data = logger->name; + r = proc_dostring(table, write, filp, buffer, lenp, ppos); + rcu_read_unlock(); + } + + return r; +} + +static __init int netfilter_log_sysctl_init(void) { int i; + + for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { + snprintf(nf_log_sysctl_fnames[i-NFPROTO_UNSPEC], 3, "%d", i); + nf_log_sysctl_table[i].ctl_name = CTL_UNNUMBERED; + nf_log_sysctl_table[i].procname = + nf_log_sysctl_fnames[i-NFPROTO_UNSPEC]; + nf_log_sysctl_table[i].data = NULL; + nf_log_sysctl_table[i].maxlen = + NFLOGGER_NAME_LEN * sizeof(char); + nf_log_sysctl_table[i].mode = 0644; + nf_log_sysctl_table[i].proc_handler = nf_log_proc_dostring; + nf_log_sysctl_table[i].extra1 = (void *)(unsigned long) i; + } + + nf_log_dir_header = register_sysctl_paths(nf_log_sysctl_path, + nf_log_sysctl_table); + if (!nf_log_dir_header) + return -ENOMEM; + + return 0; +} +#else +static __init int netfilter_log_sysctl_init(void) +{ + return 0; +} +#endif /* CONFIG_SYSCTL */ + +int __init netfilter_log_init(void) +{ + int i, r; #ifdef CONFIG_PROC_FS if (!proc_create("nf_log", S_IRUGO, proc_net_netfilter, &nflog_file_ops)) return -1; #endif + /* Errors will trigger panic, unroll on error is unnecessary. */ + r = netfilter_log_sysctl_init(); + if (r < 0) + return r; + for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) INIT_LIST_HEAD(&(nf_loggers_l[i])); |