Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 1 | #include <linux/kernel.h> |
| 2 | #include <linux/init.h> |
| 3 | #include <linux/module.h> |
| 4 | #include <linux/proc_fs.h> |
| 5 | #include <linux/skbuff.h> |
| 6 | #include <linux/netfilter.h> |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 7 | #include <linux/seq_file.h> |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 8 | #include <net/protocol.h> |
Patrick McHardy | f01ffbd | 2007-12-17 22:38:49 -0800 | [diff] [blame] | 9 | #include <net/netfilter/nf_log.h> |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 10 | |
| 11 | #include "nf_internals.h" |
| 12 | |
YOSHIFUJI Hideaki | a5d2926 | 2007-07-19 10:44:21 +0900 | [diff] [blame] | 13 | /* Internal logging interface, which relies on the real |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 14 | LOG target modules */ |
| 15 | |
| 16 | #define NF_LOG_PREFIXLEN 128 |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 17 | #define NFLOGGER_NAME_LEN 64 |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 18 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 19 | static struct list_head nf_loggers_l[NFPROTO_NUMPROTO] __read_mostly; |
Patrick McHardy | 9b73534 | 2007-02-12 11:11:39 -0800 | [diff] [blame] | 20 | static DEFINE_MUTEX(nf_log_mutex); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 21 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 22 | static struct nf_logger *__find_logger(int pf, const char *str_logger) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 23 | { |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 24 | struct nf_logger *t; |
| 25 | |
| 26 | list_for_each_entry(t, &nf_loggers_l[pf], list[pf]) { |
| 27 | if (!strnicmp(str_logger, t->name, strlen(t->name))) |
| 28 | return t; |
| 29 | } |
| 30 | |
| 31 | return NULL; |
| 32 | } |
| 33 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 34 | void nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger) |
| 35 | { |
| 36 | const struct nf_logger *log; |
| 37 | |
| 38 | if (!net_eq(net, &init_net)) |
| 39 | return; |
| 40 | |
| 41 | if (pf == NFPROTO_UNSPEC) |
| 42 | return; |
| 43 | |
| 44 | mutex_lock(&nf_log_mutex); |
| 45 | log = rcu_dereference_protected(net->nf.nf_loggers[pf], |
| 46 | lockdep_is_held(&nf_log_mutex)); |
| 47 | if (log == NULL) |
| 48 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); |
| 49 | |
| 50 | mutex_unlock(&nf_log_mutex); |
| 51 | } |
| 52 | EXPORT_SYMBOL(nf_log_set); |
| 53 | |
| 54 | void nf_log_unset(struct net *net, const struct nf_logger *logger) |
| 55 | { |
| 56 | int i; |
| 57 | const struct nf_logger *log; |
| 58 | |
| 59 | if (!net_eq(net, &init_net)) |
| 60 | return; |
| 61 | |
| 62 | mutex_lock(&nf_log_mutex); |
| 63 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { |
| 64 | log = rcu_dereference_protected(net->nf.nf_loggers[i], |
| 65 | lockdep_is_held(&nf_log_mutex)); |
| 66 | if (log == logger) |
| 67 | RCU_INIT_POINTER(net->nf.nf_loggers[i], NULL); |
| 68 | } |
| 69 | mutex_unlock(&nf_log_mutex); |
| 70 | synchronize_rcu(); |
| 71 | } |
| 72 | EXPORT_SYMBOL(nf_log_unset); |
| 73 | |
Adam Buchbinder | d93cf06 | 2012-09-19 21:47:58 -0400 | [diff] [blame] | 74 | /* return EEXIST if the same logger is registered, 0 on success. */ |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 75 | int nf_log_register(u_int8_t pf, struct nf_logger *logger) |
| 76 | { |
Eric Dumazet | b6f0a36 | 2009-04-15 12:16:19 +0200 | [diff] [blame] | 77 | int i; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 78 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 79 | if (pf >= ARRAY_SIZE(init_net.nf.nf_loggers)) |
Harald Welte | 8a61fad | 2005-08-09 20:23:53 -0700 | [diff] [blame] | 80 | return -EINVAL; |
| 81 | |
Eric Dumazet | b6f0a36 | 2009-04-15 12:16:19 +0200 | [diff] [blame] | 82 | for (i = 0; i < ARRAY_SIZE(logger->list); i++) |
| 83 | INIT_LIST_HEAD(&logger->list[i]); |
| 84 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 85 | mutex_lock(&nf_log_mutex); |
Harald Welte | d72367b | 2005-08-09 20:23:36 -0700 | [diff] [blame] | 86 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 87 | if (pf == NFPROTO_UNSPEC) { |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 88 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
| 89 | list_add_tail(&(logger->list[i]), &(nf_loggers_l[i])); |
| 90 | } else { |
| 91 | /* register at end of list to honor first register win */ |
| 92 | list_add_tail(&logger->list[pf], &nf_loggers_l[pf]); |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 93 | } |
Patrick McHardy | 9b73534 | 2007-02-12 11:11:39 -0800 | [diff] [blame] | 94 | |
| 95 | mutex_unlock(&nf_log_mutex); |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 96 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 97 | nf_log_set(&init_net, pf, logger); |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 98 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 99 | } |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 100 | EXPORT_SYMBOL(nf_log_register); |
| 101 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 102 | void nf_log_unregister(struct nf_logger *logger) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 103 | { |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 104 | int i; |
| 105 | |
Patrick McHardy | 9b73534 | 2007-02-12 11:11:39 -0800 | [diff] [blame] | 106 | mutex_lock(&nf_log_mutex); |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 107 | for (i = 0; i < NFPROTO_NUMPROTO; i++) |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 108 | list_del(&logger->list[i]); |
Patrick McHardy | 9b73534 | 2007-02-12 11:11:39 -0800 | [diff] [blame] | 109 | mutex_unlock(&nf_log_mutex); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 110 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 111 | nf_log_unset(&init_net, logger); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 112 | } |
Patrick McHardy | e92ad99 | 2007-02-12 11:11:55 -0800 | [diff] [blame] | 113 | EXPORT_SYMBOL(nf_log_unregister); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 114 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 115 | int nf_log_bind_pf(struct net *net, u_int8_t pf, |
| 116 | const struct nf_logger *logger) |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 117 | { |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 118 | if (!net_eq(net, &init_net)) |
| 119 | return 0; |
| 120 | |
| 121 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
Jan Engelhardt | 9ef0298 | 2011-03-02 12:10:13 +0100 | [diff] [blame] | 122 | return -EINVAL; |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 123 | mutex_lock(&nf_log_mutex); |
| 124 | if (__find_logger(pf, logger->name) == NULL) { |
| 125 | mutex_unlock(&nf_log_mutex); |
| 126 | return -ENOENT; |
| 127 | } |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 128 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 129 | mutex_unlock(&nf_log_mutex); |
| 130 | return 0; |
| 131 | } |
| 132 | EXPORT_SYMBOL(nf_log_bind_pf); |
| 133 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 134 | void nf_log_unbind_pf(struct net *net, u_int8_t pf) |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 135 | { |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 136 | if (!net_eq(net, &init_net)) |
| 137 | return; |
| 138 | |
| 139 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
Jan Engelhardt | 9ef0298 | 2011-03-02 12:10:13 +0100 | [diff] [blame] | 140 | return; |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 141 | mutex_lock(&nf_log_mutex); |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 142 | RCU_INIT_POINTER(net->nf.nf_loggers[pf], NULL); |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 143 | mutex_unlock(&nf_log_mutex); |
| 144 | } |
| 145 | EXPORT_SYMBOL(nf_log_unbind_pf); |
| 146 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 147 | void nf_log_packet(struct net *net, |
| 148 | u_int8_t pf, |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 149 | unsigned int hooknum, |
| 150 | const struct sk_buff *skb, |
| 151 | const struct net_device *in, |
| 152 | const struct net_device *out, |
Patrick McHardy | 7b2f963 | 2007-12-17 22:39:08 -0800 | [diff] [blame] | 153 | const struct nf_loginfo *loginfo, |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 154 | const char *fmt, ...) |
| 155 | { |
| 156 | va_list args; |
| 157 | char prefix[NF_LOG_PREFIXLEN]; |
Patrick McHardy | 7b2f963 | 2007-12-17 22:39:08 -0800 | [diff] [blame] | 158 | const struct nf_logger *logger; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 159 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 160 | if (!net_eq(net, &init_net)) |
| 161 | return; |
| 162 | |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 163 | rcu_read_lock(); |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 164 | logger = rcu_dereference(net->nf.nf_loggers[pf]); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 165 | if (logger) { |
| 166 | va_start(args, fmt); |
| 167 | vsnprintf(prefix, sizeof(prefix), fmt, args); |
| 168 | va_end(args); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 169 | logger->logfn(pf, hooknum, skb, in, out, loginfo, prefix); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 170 | } |
| 171 | rcu_read_unlock(); |
| 172 | } |
| 173 | EXPORT_SYMBOL(nf_log_packet); |
| 174 | |
| 175 | #ifdef CONFIG_PROC_FS |
| 176 | static void *seq_start(struct seq_file *seq, loff_t *pos) |
| 177 | { |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 178 | struct net *net = seq_file_net(seq); |
| 179 | |
Patrick McHardy | 6440fe0 | 2009-11-19 04:59:05 +0000 | [diff] [blame] | 180 | mutex_lock(&nf_log_mutex); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 181 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 182 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 183 | return NULL; |
| 184 | |
| 185 | return pos; |
| 186 | } |
| 187 | |
| 188 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 189 | { |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 190 | struct net *net = seq_file_net(s); |
| 191 | |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 192 | (*pos)++; |
| 193 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 194 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 195 | return NULL; |
| 196 | |
| 197 | return pos; |
| 198 | } |
| 199 | |
| 200 | static void seq_stop(struct seq_file *s, void *v) |
| 201 | { |
Patrick McHardy | 6440fe0 | 2009-11-19 04:59:05 +0000 | [diff] [blame] | 202 | mutex_unlock(&nf_log_mutex); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | static int seq_show(struct seq_file *s, void *v) |
| 206 | { |
| 207 | loff_t *pos = v; |
| 208 | const struct nf_logger *logger; |
Eric Leblond | c7a913c | 2009-03-16 14:55:27 +0100 | [diff] [blame] | 209 | struct nf_logger *t; |
| 210 | int ret; |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 211 | struct net *net = seq_file_net(s); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 212 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 213 | logger = rcu_dereference_protected(net->nf.nf_loggers[*pos], |
Eric Dumazet | 0e60ebe | 2010-11-15 18:17:21 +0100 | [diff] [blame] | 214 | lockdep_is_held(&nf_log_mutex)); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 215 | |
| 216 | if (!logger) |
Eric Leblond | c7a913c | 2009-03-16 14:55:27 +0100 | [diff] [blame] | 217 | ret = seq_printf(s, "%2lld NONE (", *pos); |
| 218 | else |
| 219 | ret = seq_printf(s, "%2lld %s (", *pos, logger->name); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 220 | |
Eric Leblond | c7a913c | 2009-03-16 14:55:27 +0100 | [diff] [blame] | 221 | if (ret < 0) |
| 222 | return ret; |
| 223 | |
Eric Leblond | c7a913c | 2009-03-16 14:55:27 +0100 | [diff] [blame] | 224 | list_for_each_entry(t, &nf_loggers_l[*pos], list[*pos]) { |
| 225 | ret = seq_printf(s, "%s", t->name); |
Patrick McHardy | 6440fe0 | 2009-11-19 04:59:05 +0000 | [diff] [blame] | 226 | if (ret < 0) |
Eric Leblond | c7a913c | 2009-03-16 14:55:27 +0100 | [diff] [blame] | 227 | return ret; |
Eric Leblond | c7a913c | 2009-03-16 14:55:27 +0100 | [diff] [blame] | 228 | if (&t->list[*pos] != nf_loggers_l[*pos].prev) { |
| 229 | ret = seq_printf(s, ","); |
Patrick McHardy | 6440fe0 | 2009-11-19 04:59:05 +0000 | [diff] [blame] | 230 | if (ret < 0) |
Eric Leblond | c7a913c | 2009-03-16 14:55:27 +0100 | [diff] [blame] | 231 | return ret; |
Eric Leblond | c7a913c | 2009-03-16 14:55:27 +0100 | [diff] [blame] | 232 | } |
| 233 | } |
Eric Leblond | c7a913c | 2009-03-16 14:55:27 +0100 | [diff] [blame] | 234 | |
| 235 | return seq_printf(s, ")\n"); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 236 | } |
| 237 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 238 | static const struct seq_operations nflog_seq_ops = { |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 239 | .start = seq_start, |
| 240 | .next = seq_next, |
| 241 | .stop = seq_stop, |
| 242 | .show = seq_show, |
| 243 | }; |
| 244 | |
| 245 | static int nflog_open(struct inode *inode, struct file *file) |
| 246 | { |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 247 | return seq_open_net(inode, file, &nflog_seq_ops, |
| 248 | sizeof(struct seq_net_private)); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 251 | static const struct file_operations nflog_file_ops = { |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 252 | .owner = THIS_MODULE, |
| 253 | .open = nflog_open, |
| 254 | .read = seq_read, |
| 255 | .llseek = seq_lseek, |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 256 | .release = seq_release_net, |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 257 | }; |
| 258 | |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 259 | |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 260 | #endif /* PROC_FS */ |
| 261 | |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 262 | #ifdef CONFIG_SYSCTL |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 263 | static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3]; |
| 264 | static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1]; |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 265 | |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 266 | static int nf_log_proc_dostring(ctl_table *table, int write, |
Patrick McHardy | 2495561 | 2009-06-22 14:15:30 +0200 | [diff] [blame] | 267 | void __user *buffer, size_t *lenp, loff_t *ppos) |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 268 | { |
| 269 | const struct nf_logger *logger; |
Patrick McHardy | 2495561 | 2009-06-22 14:15:30 +0200 | [diff] [blame] | 270 | char buf[NFLOGGER_NAME_LEN]; |
| 271 | size_t size = *lenp; |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 272 | int r = 0; |
| 273 | int tindex = (unsigned long)table->extra1; |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 274 | struct net *net = current->nsproxy->net_ns; |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 275 | |
| 276 | if (write) { |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 277 | if (!net_eq(net, &init_net)) |
| 278 | return -EPERM; |
| 279 | |
Patrick McHardy | 2495561 | 2009-06-22 14:15:30 +0200 | [diff] [blame] | 280 | if (size > sizeof(buf)) |
| 281 | size = sizeof(buf); |
| 282 | if (copy_from_user(buf, buffer, size)) |
| 283 | return -EFAULT; |
| 284 | |
| 285 | if (!strcmp(buf, "NONE")) { |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 286 | nf_log_unbind_pf(net, tindex); |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 287 | return 0; |
| 288 | } |
| 289 | mutex_lock(&nf_log_mutex); |
Patrick McHardy | 2495561 | 2009-06-22 14:15:30 +0200 | [diff] [blame] | 290 | logger = __find_logger(tindex, buf); |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 291 | if (logger == NULL) { |
| 292 | mutex_unlock(&nf_log_mutex); |
| 293 | return -ENOENT; |
| 294 | } |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 295 | rcu_assign_pointer(net->nf.nf_loggers[tindex], logger); |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 296 | mutex_unlock(&nf_log_mutex); |
| 297 | } else { |
Patrick McHardy | 266d07c | 2009-06-13 12:21:10 +0200 | [diff] [blame] | 298 | mutex_lock(&nf_log_mutex); |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 299 | logger = rcu_dereference_protected(net->nf.nf_loggers[tindex], |
Eric Dumazet | 0e60ebe | 2010-11-15 18:17:21 +0100 | [diff] [blame] | 300 | lockdep_is_held(&nf_log_mutex)); |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 301 | if (!logger) |
| 302 | table->data = "NONE"; |
| 303 | else |
| 304 | table->data = logger->name; |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 305 | r = proc_dostring(table, write, buffer, lenp, ppos); |
Patrick McHardy | 266d07c | 2009-06-13 12:21:10 +0200 | [diff] [blame] | 306 | mutex_unlock(&nf_log_mutex); |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | return r; |
| 310 | } |
| 311 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 312 | static int netfilter_log_sysctl_init(struct net *net) |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 313 | { |
| 314 | int i; |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 315 | struct ctl_table *table; |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 316 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 317 | table = nf_log_sysctl_table; |
| 318 | if (!net_eq(net, &init_net)) { |
| 319 | table = kmemdup(nf_log_sysctl_table, |
| 320 | sizeof(nf_log_sysctl_table), |
| 321 | GFP_KERNEL); |
| 322 | if (!table) |
| 323 | goto err_alloc; |
| 324 | } else { |
| 325 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { |
| 326 | snprintf(nf_log_sysctl_fnames[i], |
| 327 | 3, "%d", i); |
| 328 | nf_log_sysctl_table[i].procname = |
| 329 | nf_log_sysctl_fnames[i]; |
| 330 | nf_log_sysctl_table[i].data = NULL; |
| 331 | nf_log_sysctl_table[i].maxlen = |
| 332 | NFLOGGER_NAME_LEN * sizeof(char); |
| 333 | nf_log_sysctl_table[i].mode = 0644; |
| 334 | nf_log_sysctl_table[i].proc_handler = |
| 335 | nf_log_proc_dostring; |
| 336 | nf_log_sysctl_table[i].extra1 = |
| 337 | (void *)(unsigned long) i; |
| 338 | } |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 339 | } |
| 340 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 341 | net->nf.nf_log_dir_header = register_net_sysctl(net, |
| 342 | "net/netfilter/nf_log", |
| 343 | table); |
| 344 | if (!net->nf.nf_log_dir_header) |
| 345 | goto err_reg; |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 346 | |
| 347 | return 0; |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 348 | |
| 349 | err_reg: |
| 350 | if (!net_eq(net, &init_net)) |
| 351 | kfree(table); |
| 352 | err_alloc: |
| 353 | return -ENOMEM; |
| 354 | } |
| 355 | |
| 356 | static void netfilter_log_sysctl_exit(struct net *net) |
| 357 | { |
| 358 | struct ctl_table *table; |
| 359 | |
| 360 | table = net->nf.nf_log_dir_header->ctl_table_arg; |
| 361 | unregister_net_sysctl_table(net->nf.nf_log_dir_header); |
| 362 | if (!net_eq(net, &init_net)) |
| 363 | kfree(table); |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 364 | } |
| 365 | #else |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 366 | static int netfilter_log_sysctl_init(struct net *net) |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 367 | { |
| 368 | return 0; |
| 369 | } |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 370 | |
| 371 | static void netfilter_log_sysctl_exit(struct net *net) |
| 372 | { |
| 373 | } |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 374 | #endif /* CONFIG_SYSCTL */ |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 375 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 376 | static int __net_init nf_log_net_init(struct net *net) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 377 | { |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 378 | int ret = -ENOMEM; |
| 379 | |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 380 | #ifdef CONFIG_PROC_FS |
Denis V. Lunev | 8eeee8b | 2008-03-27 16:55:53 -0700 | [diff] [blame] | 381 | if (!proc_create("nf_log", S_IRUGO, |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 382 | net->nf.proc_netfilter, &nflog_file_ops)) |
| 383 | return ret; |
Harald Welte | 6224392 | 2005-08-11 15:30:45 -0700 | [diff] [blame] | 384 | #endif |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 385 | ret = netfilter_log_sysctl_init(net); |
| 386 | if (ret < 0) |
| 387 | goto out_sysctl; |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 388 | |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame^] | 389 | return 0; |
| 390 | |
| 391 | out_sysctl: |
| 392 | /* For init_net: errors will trigger panic, don't unroll on error. */ |
| 393 | if (!net_eq(net, &init_net)) |
| 394 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
| 395 | |
| 396 | return ret; |
| 397 | } |
| 398 | |
| 399 | static void __net_exit nf_log_net_exit(struct net *net) |
| 400 | { |
| 401 | netfilter_log_sysctl_exit(net); |
| 402 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
| 403 | } |
| 404 | |
| 405 | static struct pernet_operations nf_log_net_ops = { |
| 406 | .init = nf_log_net_init, |
| 407 | .exit = nf_log_net_exit, |
| 408 | }; |
| 409 | |
| 410 | int __init netfilter_log_init(void) |
| 411 | { |
| 412 | int i, ret; |
| 413 | |
| 414 | ret = register_pernet_subsys(&nf_log_net_ops); |
| 415 | if (ret < 0) |
| 416 | return ret; |
Eric Leblond | 1762527 | 2009-03-23 13:16:53 +0100 | [diff] [blame] | 417 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 418 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
| 419 | INIT_LIST_HEAD(&(nf_loggers_l[i])); |
| 420 | |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 421 | return 0; |
| 422 | } |