Currently, the sock_from_file prototype takes an "err" pointer that is
either not set or set to -ENOTSOCK IFF the returned socket is NULL. This
makes the error redundant and it is ignored by a few callers.
This patch simplifies the API by letting callers deduce the error based
on whether the returned socket is NULL or not.
Suggested-by: Al Viro
Signed-off-by: Florent Revest
---
fs/eventpoll.c | 3 +--
fs/io_uring.c| 16
include/linux/net.h | 2 +-
net/core/netclassid_cgroup.c | 3 +--
net/core/netprio_cgroup.c| 3 +--
net/core/sock.c | 8 +---
net/socket.c | 27 ---
7 files changed, 29 insertions(+), 33 deletions(-)
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 4df61129566d..c764d8d5a76a 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -415,12 +415,11 @@ static inline void ep_set_busy_poll_napi_id(struct epitem
*epi)
unsigned int napi_id;
struct socket *sock;
struct sock *sk;
- int err;
if (!net_busy_loop_on())
return;
- sock = sock_from_file(epi->ffd.file, );
+ sock = sock_from_file(epi->ffd.file);
if (!sock)
return;
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 8018c7076b25..ace99b15cbd3 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4341,9 +4341,9 @@ static int io_sendmsg(struct io_kiocb *req, bool
force_nonblock,
unsigned flags;
int ret;
- sock = sock_from_file(req->file, );
+ sock = sock_from_file(req->file);
if (unlikely(!sock))
- return ret;
+ return -ENOTSOCK;
if (req->async_data) {
kmsg = req->async_data;
@@ -4390,9 +4390,9 @@ static int io_send(struct io_kiocb *req, bool
force_nonblock,
unsigned flags;
int ret;
- sock = sock_from_file(req->file, );
+ sock = sock_from_file(req->file);
if (unlikely(!sock))
- return ret;
+ return -ENOTSOCK;
ret = import_single_range(WRITE, sr->buf, sr->len, , _iter);
if (unlikely(ret))
@@ -4569,9 +4569,9 @@ static int io_recvmsg(struct io_kiocb *req, bool
force_nonblock,
unsigned flags;
int ret, cflags = 0;
- sock = sock_from_file(req->file, );
+ sock = sock_from_file(req->file);
if (unlikely(!sock))
- return ret;
+ return -ENOTSOCK;
if (req->async_data) {
kmsg = req->async_data;
@@ -4632,9 +4632,9 @@ static int io_recv(struct io_kiocb *req, bool
force_nonblock,
unsigned flags;
int ret, cflags = 0;
- sock = sock_from_file(req->file, );
+ sock = sock_from_file(req->file);
if (unlikely(!sock))
- return ret;
+ return -ENOTSOCK;
if (req->flags & REQ_F_BUFFER_SELECT) {
kbuf = io_recv_buffer_select(req, !force_nonblock);
diff --git a/include/linux/net.h b/include/linux/net.h
index 0dcd51feef02..9e2324efc26a 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -240,7 +240,7 @@ int sock_sendmsg(struct socket *sock, struct msghdr *msg);
int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags);
struct file *sock_alloc_file(struct socket *sock, int flags, const char
*dname);
struct socket *sockfd_lookup(int fd, int *err);
-struct socket *sock_from_file(struct file *file, int *err);
+struct socket *sock_from_file(struct file *file);
#define sockfd_put(sock) fput(sock->file)
int net_ratelimit(void);
diff --git a/net/core/netclassid_cgroup.c b/net/core/netclassid_cgroup.c
index 41b24cd31562..b49c57d35a88 100644
--- a/net/core/netclassid_cgroup.c
+++ b/net/core/netclassid_cgroup.c
@@ -68,9 +68,8 @@ struct update_classid_context {
static int update_classid_sock(const void *v, struct file *file, unsigned n)
{
- int err;
struct update_classid_context *ctx = (void *)v;
- struct socket *sock = sock_from_file(file, );
+ struct socket *sock = sock_from_file(file);
if (sock) {
spin_lock(_sk_update_lock);
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 9bd4cab7d510..99a431c56f23 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -220,8 +220,7 @@ static ssize_t write_priomap(struct kernfs_open_file *of,
static int update_netprio(const void *v, struct file *file, unsigned n)
{
- int err;
- struct socket *sock = sock_from_file(file, );
+ struct socket *sock = sock_from_file(file);
if (sock) {
spin_lock(_sk_update_lock);
sock_cgroup_set_prioidx(>sk->sk_cgrp_data,
diff --git a/net/core/sock.c b/net/core/sock.c
index 727ea1cc633c..dd0598d831ef 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2808,14 +2808,8 @@ EXPORT_SYMBOL(sock_no_mmap);
void __receive_sock(struct file *file)
{
