diff options
| -rw-r--r-- | include/net/phonet/pn_dev.h | 1 | ||||
| -rw-r--r-- | net/phonet/pn_dev.c | 2 | ||||
| -rw-r--r-- | net/phonet/socket.c | 96 |
3 files changed, 99 insertions, 0 deletions
diff --git a/include/net/phonet/pn_dev.h b/include/net/phonet/pn_dev.h index 2d16783..13649eb 100644 --- a/include/net/phonet/pn_dev.h +++ b/include/net/phonet/pn_dev.h @@ -57,5 +57,6 @@ struct net_device *phonet_route_output(struct net *net, u8 daddr); #define PN_NO_ADDR 0xff extern const struct file_operations pn_sock_seq_fops; +extern const struct file_operations pn_res_seq_fops; #endif diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c index d0a4294..947038d 100644 --- a/net/phonet/pn_dev.c +++ b/net/phonet/pn_dev.c @@ -373,6 +373,7 @@ int __init phonet_device_init(void) if (err) return err; + proc_net_fops_create(&init_net, "pnresource", 0, &pn_res_seq_fops); register_netdevice_notifier(&phonet_device_notifier); err = phonet_netlink_register(); if (err) @@ -385,6 +386,7 @@ void phonet_device_exit(void) rtnl_unregister_all(PF_PHONET); unregister_netdevice_notifier(&phonet_device_notifier); unregister_pernet_device(&phonet_net_ops); + proc_net_remove(&init_net, "pnresource"); } int phonet_route_add(struct net_device *dev, u8 daddr) diff --git a/net/phonet/socket.c b/net/phonet/socket.c index d4f41af..6bf6e3c 100644 --- a/net/phonet/socket.c +++ b/net/phonet/socket.c @@ -654,3 +654,99 @@ void pn_sock_unbind_all_res(struct sock *sk) match--; } } + +#ifdef CONFIG_PROC_FS +static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos) +{ + struct net *net = seq_file_net(seq); + unsigned i; + + if (!net_eq(net, &init_net)) + return NULL; + + for (i = 0; i < 256; i++) { + if (pnres.sk[i] == NULL) + continue; + if (!pos) + return pnres.sk + i; + pos--; + } + return NULL; +} + +static struct sock **pn_res_get_next(struct seq_file *seq, struct sock **sk) +{ + struct net *net = seq_file_net(seq); + unsigned i; + + BUG_ON(!net_eq(net, &init_net)); + + for (i = (sk - pnres.sk) + 1; i < 256; i++) + if (pnres.sk[i]) + return pnres.sk + i; + return NULL; +} + +static void *pn_res_seq_start(struct seq_file *seq, loff_t *pos) + __acquires(resource_mutex) +{ + mutex_lock(&resource_mutex); + return *pos ? pn_res_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; +} + +static void *pn_res_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + struct sock **sk; + + if (v == SEQ_START_TOKEN) + sk = pn_res_get_idx(seq, 0); + else + sk = pn_res_get_next(seq, v); + (*pos)++; + return sk; +} + +static void pn_res_seq_stop(struct seq_file *seq, void *v) + __releases(resource_mutex) +{ + mutex_unlock(&resource_mutex); +} + +static int pn_res_seq_show(struct seq_file *seq, void *v) +{ + int len; + + if (v == SEQ_START_TOKEN) + seq_printf(seq, "%s%n", "rs uid inode", &len); + else { + struct sock **psk = v; + struct sock *sk = *psk; + + seq_printf(seq, "%02X %5d %lu%n", + psk - pnres.sk, sock_i_uid(sk), sock_i_ino(sk), &len); + } + seq_printf(seq, "%*s\n", 63 - len, ""); + return 0; +} + +static const struct seq_operations pn_res_seq_ops = { + .start = pn_res_seq_start, + .next = pn_res_seq_next, + .stop = pn_res_seq_stop, + .show = pn_res_seq_show, +}; + +static int pn_res_open(struct inode *inode, struct file *file) +{ + return seq_open_net(inode, file, &pn_res_seq_ops, + sizeof(struct seq_net_private)); +} + +const struct file_operations pn_res_seq_fops = { + .owner = THIS_MODULE, + .open = pn_res_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_net, +}; +#endif |
