Continue converting the proto-layer getsockopt callbacks to the sockopt_t interface, splitting pep_getsockopt() into a do_pep_getsockopt() helper that takes a sockopt_t.
The thin pep_getsockopt() wrapper keeps its __user signature for now: it builds a user-backed sockopt_t with sockopt_init_user(), calls the helper, and writes the returned length back to optlen. The helper uses copy_to_iter() instead of copy_to_user(). No functional change. Signed-off-by: Breno Leitao <[email protected]> Acked-by: Rémi Denis-Courmont <[email protected]> --- net/phonet/pep.c | 36 ++++++++++++++++++++++++++---------- 1 file changed, 26 insertions(+), 10 deletions(-) diff --git a/net/phonet/pep.c b/net/phonet/pep.c index 60d1a5375725b..7ef4a9a240ef8 100644 --- a/net/phonet/pep.c +++ b/net/phonet/pep.c @@ -1078,17 +1078,11 @@ static int pep_setsockopt(struct sock *sk, int level, int optname, return err; } -static int pep_getsockopt(struct sock *sk, int level, int optname, - char __user *optval, int __user *optlen) +static int do_pep_getsockopt(struct sock *sk, int optname, sockopt_t *opt) { struct pep_sock *pn = pep_sk(sk); int len, val; - if (level != SOL_PNPIPE) - return -ENOPROTOOPT; - if (get_user(len, optlen)) - return -EFAULT; - switch (optname) { case PNPIPE_ENCAP: val = pn->ifindex ? PNPIPE_ENCAP_IP : PNPIPE_ENCAP_NONE; @@ -1112,11 +1106,33 @@ static int pep_getsockopt(struct sock *sk, int level, int optname, return -ENOPROTOOPT; } - len = min_t(unsigned int, sizeof(int), len); - if (put_user(len, optlen)) + len = umin(sizeof(int), opt->optlen); + opt->optlen = len; + if (copy_to_iter(&val, len, &opt->iter_out) != len) return -EFAULT; - if (copy_to_user(optval, &val, len)) + return 0; +} + +static int pep_getsockopt(struct sock *sk, int level, int optname, + char __user *optval, int __user *optlen) +{ + sockopt_t opt; + int err; + + if (level != SOL_PNPIPE) + return -ENOPROTOOPT; + + err = sockopt_init_user(&opt, optval, optlen); + if (err) + return err; + + err = do_pep_getsockopt(sk, optname, &opt); + if (err) + return err; + + if (put_user(opt.optlen, optlen)) return -EFAULT; + return 0; } -- 2.53.0-Meta
