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Subject[PATCHv4 5/6] Allow setting O_NONBLOCK flag for new sockets
This patch adds support for setting the O_NONBLOCK flag of the file
descriptors returned by socket, socketpair, and accept.

socket.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
--- net/socket.c
+++ net/socket.c
@@ -362,7 +362,7 @@ static int sock_alloc_fd(struct file **filep, int flags)
return fd;
}

-static int sock_attach_fd(struct socket *sock, struct file *file)
+static int sock_attach_fd(struct socket *sock, struct file *file, int flags)
{
struct dentry *dentry;
struct qstr name = { .name = "" };
@@ -384,7 +384,7 @@ static int sock_attach_fd(struct socket *sock, struct file *file)
init_file(file, sock_mnt, dentry, FMODE_READ | FMODE_WRITE,
&socket_file_ops);
SOCK_INODE(sock)->i_fop = &socket_file_ops;
- file->f_flags = O_RDWR;
+ file->f_flags = O_RDWR | (flags & O_NONBLOCK);
file->f_pos = 0;
file->private_data = sock;

@@ -397,7 +397,7 @@ static int sock_map_fd_flags(struct socket *sock, int flags)
int fd = sock_alloc_fd(&newfile, flags);

if (likely(fd >= 0)) {
- int err = sock_attach_fd(sock, newfile);
+ int err = sock_attach_fd(sock, newfile, flags);

if (unlikely(err < 0)) {
put_filp(newfile);
@@ -1268,12 +1268,14 @@ asmlinkage long sys_socketpair(int family, int type, int protocol,
goto out_release_both;
}

- err = sock_attach_fd(sock1, newfile1);
+ err = sock_attach_fd(sock1, newfile1,
+ INDIRECT_PARAM(file_flags, flags));
if (unlikely(err < 0)) {
goto out_fd2;
}

- err = sock_attach_fd(sock2, newfile2);
+ err = sock_attach_fd(sock2, newfile2,
+ INDIRECT_PARAM(file_flags, flags));
if (unlikely(err < 0)) {
fput(newfile1);
goto out_fd1;
@@ -1423,7 +1425,8 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr,
goto out_put;
}

- err = sock_attach_fd(newsock, newfile);
+ err = sock_attach_fd(newsock, newfile,
+ INDIRECT_PARAM(file_flags, flags));
if (err < 0)
goto out_fd_simple;

-
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