mirror of https://gitee.com/openkylin/linux.git
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>
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@ -171,6 +171,7 @@ struct proto_ops {
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int (*compat_getsockopt)(struct socket *sock, int level,
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int optname, char __user *optval, int __user *optlen);
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#endif
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void (*show_fdinfo)(struct seq_file *m, struct socket *sock);
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int (*sendmsg) (struct socket *sock, struct msghdr *m,
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size_t total_len);
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/* Notes for implementing recvmsg:
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12
net/socket.c
12
net/socket.c
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@ -128,6 +128,7 @@ static ssize_t sock_sendpage(struct file *file, struct page *page,
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static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
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struct pipe_inode_info *pipe, size_t len,
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unsigned int flags);
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static void sock_show_fdinfo(struct seq_file *m, struct file *f);
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/*
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* Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
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@ -150,6 +151,9 @@ static const struct file_operations socket_file_ops = {
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.sendpage = sock_sendpage,
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.splice_write = generic_splice_sendpage,
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.splice_read = sock_splice_read,
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#ifdef CONFIG_PROC_FS
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.show_fdinfo = sock_show_fdinfo,
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#endif
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};
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/*
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@ -993,6 +997,14 @@ static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from)
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return res;
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}
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static void sock_show_fdinfo(struct seq_file *m, struct file *f)
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{
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struct socket *sock = f->private_data;
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if (sock->ops->show_fdinfo)
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sock->ops->show_fdinfo(m, sock);
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}
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/*
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* Atomic setting of ioctl hooks to avoid race
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* with module unload.
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