Convert ISO socket's getsockopt implementation to use the new getsockopt_iter callback with sockopt_t.
Key changes: - Replace (char __user *optval, int __user *optlen) with sockopt_t *opt - Use opt->optlen for buffer length (input) and returned size (output) - Use copy_to_iter() instead of put_user()/copy_to_user() - Add linux/uio.h for copy_to_iter() Signed-off-by: Breno Leitao <[email protected]> --- net/bluetooth/iso.c | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c index 7cb2864fe8724..0d792d36bb5ac 100644 --- a/net/bluetooth/iso.c +++ b/net/bluetooth/iso.c @@ -10,6 +10,7 @@ #include <linux/debugfs.h> #include <linux/seq_file.h> #include <linux/sched/signal.h> +#include <linux/uio.h> #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> @@ -1842,18 +1843,17 @@ static int iso_sock_setsockopt(struct socket *sock, int level, int optname, } static int iso_sock_getsockopt(struct socket *sock, int level, int optname, - char __user *optval, int __user *optlen) + sockopt_t *opt) { struct sock *sk = sock->sk; - int len, err = 0; struct bt_iso_qos *qos; + int len, val, err = 0; u8 base_len; u8 *base; BT_DBG("sk %p", sk); - if (get_user(len, optlen)) - return -EFAULT; + len = opt->optlen; lock_sock(sk); @@ -1864,15 +1864,17 @@ static int iso_sock_getsockopt(struct socket *sock, int level, int optname, break; } - if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), - (u32 __user *)optval)) + val = test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); + if (copy_to_iter(&val, sizeof(val), &opt->iter_out) != + sizeof(val)) err = -EFAULT; break; case BT_PKT_STATUS: - if (put_user(test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags), - (int __user *)optval)) + val = test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags); + if (copy_to_iter(&val, sizeof(val), &opt->iter_out) != + sizeof(val)) err = -EFAULT; break; @@ -1880,7 +1882,7 @@ static int iso_sock_getsockopt(struct socket *sock, int level, int optname, qos = iso_sock_get_qos(sk); len = min_t(unsigned int, len, sizeof(*qos)); - if (copy_to_user(optval, qos, len)) + if (copy_to_iter(qos, len, &opt->iter_out) != len) err = -EFAULT; break; @@ -1896,9 +1898,8 @@ static int iso_sock_getsockopt(struct socket *sock, int level, int optname, } len = min_t(unsigned int, len, base_len); - if (copy_to_user(optval, base, len)) - err = -EFAULT; - if (put_user(len, optlen)) + opt->optlen = len; + if (copy_to_iter(base, len, &opt->iter_out) != len) err = -EFAULT; break; @@ -2660,7 +2661,7 @@ static const struct proto_ops iso_sock_ops = { .socketpair = sock_no_socketpair, .shutdown = iso_sock_shutdown, .setsockopt = iso_sock_setsockopt, - .getsockopt = iso_sock_getsockopt + .getsockopt_iter = iso_sock_getsockopt }; static const struct net_proto_family iso_sock_family_ops = { -- 2.53.0-Meta
