diff options
| -rw-r--r-- | net/core/dev.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 8ddc2ab2314..3af0bdc8649 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2216,6 +2216,135 @@ static const struct file_operations softnet_seq_fops = { .release = seq_release, }; +static void *ptype_get_idx(loff_t pos) +{ + struct packet_type *pt = NULL; + loff_t i = 0; + int t; + + list_for_each_entry_rcu(pt, &ptype_all, list) { + if (i == pos) + return pt; + ++i; + } + + for (t = 0; t < 16; t++) { + list_for_each_entry_rcu(pt, &ptype_base[t], list) { + if (i == pos) + return pt; + ++i; + } + } + return NULL; +} + +static void *ptype_seq_start(struct seq_file *seq, loff_t *pos) +{ + rcu_read_lock(); + return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN; +} + +static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + struct packet_type *pt; + struct list_head *nxt; + int hash; + + ++*pos; + if (v == SEQ_START_TOKEN) + return ptype_get_idx(0); + + pt = v; + nxt = pt->list.next; + if (pt->type == htons(ETH_P_ALL)) { + if (nxt != &ptype_all) + goto found; + hash = 0; + nxt = ptype_base[0].next; + } else + hash = ntohs(pt->type) & 15; + + while (nxt == &ptype_base[hash]) { + if (++hash >= 16) + return NULL; + nxt = ptype_base[hash].next; + } +found: + return list_entry(nxt, struct packet_type, list); +} + +static void ptype_seq_stop(struct seq_file *seq, void *v) +{ + rcu_read_unlock(); +} + +static void ptype_seq_decode(struct seq_file *seq, void *sym) +{ +#ifdef CONFIG_KALLSYMS + unsigned long offset = 0, symsize; + const char *symname; + char *modname; + char namebuf[128]; + + symname = kallsyms_lookup((unsigned long)sym, &symsize, &offset, + &modname, namebuf); + + if (symname) { + char *delim = ":"; + + if (!modname) + modname = delim = ""; + seq_printf(seq, "%s%s%s%s+0x%lx", delim, modname, delim, + symname, offset); + return; + } +#endif + + seq_printf(seq, "[%p]", sym); +} + +static int ptype_seq_show(struct seq_file *seq, void *v) +{ + struct packet_type *pt = v; + + if (v == SEQ_START_TOKEN) + seq_puts(seq, "Type Device Function\n"); + else { + if (pt->type == htons(ETH_P_ALL)) + seq_puts(seq, "ALL "); + else + seq_printf(seq, "%04x", ntohs(pt->type)); + + seq_printf(seq, " %-8s ", + pt->dev ? pt->dev->name : ""); + ptype_seq_decode(seq, pt->func); + seq_putc(seq, '\n'); + } + + return 0; +} + +static const struct seq_operations ptype_seq_ops = { + .start = ptype_seq_start, + .next = ptype_seq_next, + .stop = ptype_seq_stop, + .show = ptype_seq_show, +}; + +static int ptype_seq_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &ptype_seq_ops); +} + +static const struct file_operations ptype_seq_fops = { + .owner = THIS_MODULE, + .open = ptype_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + + #ifdef CONFIG_WIRELESS_EXT extern int wireless_proc_init(void); #else @@ -2230,6 +2359,9 @@ static int __init dev_proc_init(void) goto out; if (!proc_net_fops_create("softnet_stat", S_IRUGO, &softnet_seq_fops)) goto out_dev; + if (!proc_net_fops_create("ptype", S_IRUGO, &ptype_seq_fops)) + goto out_dev2; + if (wireless_proc_init()) goto out_softnet; rc = 0; @@ -2237,6 +2369,8 @@ out: return rc; out_softnet: proc_net_remove("softnet_stat"); +out_dev2: + proc_net_remove("ptype"); out_dev: proc_net_remove("dev"); goto out; |