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| author | Eric Dumazet <edumazet@google.com> | 2023-04-06 19:46:34 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-04-07 20:07:07 -0700 |
| commit | 48b7ea1d22ddf657e2692fb2b399138a02d31c17 (patch) | |
| tree | 24b070b322b98c4c2958258a4bb8329b180656c0 /net/core | |
| parent | 039a692ad93e5d2f7327a26ba19cf37b1d763788 (diff) | |
| download | linux-stable-48b7ea1d22ddf657e2692fb2b399138a02d31c17.tar.gz linux-stable-48b7ea1d22ddf657e2692fb2b399138a02d31c17.tar.bz2 linux-stable-48b7ea1d22ddf657e2692fb2b399138a02d31c17.zip | |
net: make SO_BUSY_POLL available to all users
After commit 217f69743681 ("net: busy-poll: allow preemption
in sk_busy_loop()"), a thread willing to use busy polling
is not hurting other threads anymore in a non preempt kernel.
I think it is safe to remove CAP_NET_ADMIN check.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230406194634.1804691-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/sock.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index c25888795390..5440e67bcfe3 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1396,15 +1396,10 @@ set_sndbuf: #ifdef CONFIG_NET_RX_BUSY_POLL case SO_BUSY_POLL: - /* allow unprivileged users to decrease the value */ - if ((val > sk->sk_ll_usec) && !sockopt_capable(CAP_NET_ADMIN)) - ret = -EPERM; - else { - if (val < 0) - ret = -EINVAL; - else - WRITE_ONCE(sk->sk_ll_usec, val); - } + if (val < 0) + ret = -EINVAL; + else + WRITE_ONCE(sk->sk_ll_usec, val); break; case SO_PREFER_BUSY_POLL: if (valbool && !sockopt_capable(CAP_NET_ADMIN)) |