diff options
| author | Kirill Tkhai <ktkhai@virtuozzo.com> | 2019-12-09 13:03:40 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-12-12 17:04:54 -0800 |
| commit | b4653342b1514cb11f25b727c689451aff02996d (patch) | |
| tree | 9cd9cecda77261092922976494939bebb7a4050b | |
| parent | 6b8350a4b0d58cfee39368e5cf6c67369d59b629 (diff) | |
| download | linux-b4653342b1514cb11f25b727c689451aff02996d.tar.gz linux-b4653342b1514cb11f25b727c689451aff02996d.tar.bz2 linux-b4653342b1514cb11f25b727c689451aff02996d.zip | |
net: Allow to show socket-specific information in /proc/[pid]/fdinfo/[fd]
This adds .show_fdinfo to socket_file_ops, so protocols will be able
to print their specific data in fdinfo.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/net.h | 1 | ||||
| -rw-r--r-- | net/socket.c | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/net.h b/include/linux/net.h index 9cafb5f353a9..6451425e828f 100644 --- a/include/linux/net.h +++ b/include/linux/net.h @@ -171,6 +171,7 @@ struct proto_ops { int (*compat_getsockopt)(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen); #endif + void (*show_fdinfo)(struct seq_file *m, struct socket *sock); int (*sendmsg) (struct socket *sock, struct msghdr *m, size_t total_len); /* Notes for implementing recvmsg: diff --git a/net/socket.c b/net/socket.c index 4d38d49d6ad9..532f123e0459 100644 --- a/net/socket.c +++ b/net/socket.c @@ -128,6 +128,7 @@ static ssize_t sock_sendpage(struct file *file, struct page *page, static ssize_t sock_splice_read(struct file *file, loff_t *ppos, struct pipe_inode_info *pipe, size_t len, unsigned int flags); +static void sock_show_fdinfo(struct seq_file *m, struct file *f); /* * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear @@ -150,6 +151,9 @@ static const struct file_operations socket_file_ops = { .sendpage = sock_sendpage, .splice_write = generic_splice_sendpage, .splice_read = sock_splice_read, +#ifdef CONFIG_PROC_FS + .show_fdinfo = sock_show_fdinfo, +#endif }; /* @@ -993,6 +997,14 @@ static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) return res; } +static void sock_show_fdinfo(struct seq_file *m, struct file *f) +{ + struct socket *sock = f->private_data; + + if (sock->ops->show_fdinfo) + sock->ops->show_fdinfo(m, sock); +} + /* * Atomic setting of ioctl hooks to avoid race * with module unload. |