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authorKirill Tkhai <ktkhai@virtuozzo.com>2019-12-09 13:03:40 +0300
committerDavid S. Miller <davem@davemloft.net>2019-12-13 04:04:54 +0300
commitb4653342b1514cb11f25b727c689451aff02996d (patch)
tree9cd9cecda77261092922976494939bebb7a4050b /net/socket.c
parent6b8350a4b0d58cfee39368e5cf6c67369d59b629 (diff)
downloadlinux-b4653342b1514cb11f25b727c689451aff02996d.tar.xz
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>
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c12
1 files changed, 12 insertions, 0 deletions
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.