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net: Remove the err argument from sock_from_file

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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 <viro@zeniv.linux.org.uk>
Signed-off-by: Florent Revest <revest@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: KP Singh <kpsingh@google.com>
Link: https://lore.kernel.org/bpf/20201204113609.1850150-1-revest@google.com
This commit is contained in:
Florent Revest
2020-12-04 12:36:04 +01:00
committed by Daniel Borkmann
parent 5c667dca71
commit dba4a9256b
7 changed files with 29 additions and 33 deletions
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3
fs/eventpoll.c
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@@ -416,12 +416,11 @@ 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, &err);
sock = sock_from_file(epi->ffd.file);
if (!sock)
return;