Convert HCI 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 *sopt - Use sopt->optlen for buffer length (input) - Use copy_to_iter() instead of put_user()/copy_to_user() - Add linux/uio.h for copy_to_iter() The sockopt_t parameter is named sopt rather than opt to avoid collision with the existing local int opt used by HCI_DATA_DIR and HCI_TIME_STAMP. Signed-off-by: Breno Leitao <[email protected]> --- net/bluetooth/hci_sock.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index 1823c06ba8940..61fec674a2078 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -27,6 +27,7 @@ #include <linux/export.h> #include <linux/utsname.h> #include <linux/sched.h> +#include <linux/uio.h> #include <linux/unaligned.h> #include <net/bluetooth/bluetooth.h> @@ -2063,7 +2064,7 @@ static int hci_sock_setsockopt(struct socket *sock, int level, int optname, } static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname, - char __user *optval, int __user *optlen) + sockopt_t *sopt) { struct hci_ufilter uf; struct sock *sk = sock->sk; @@ -2071,8 +2072,7 @@ static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname, BT_DBG("sk %p, opt %d", sk, optname); - if (get_user(len, optlen)) - return -EFAULT; + len = sopt->optlen; lock_sock(sk); @@ -2088,7 +2088,8 @@ static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname, else opt = 0; - if (put_user(opt, (int __user *)optval)) + if (copy_to_iter(&opt, sizeof(opt), &sopt->iter_out) != + sizeof(opt)) err = -EFAULT; break; @@ -2098,7 +2099,8 @@ static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname, else opt = 0; - if (put_user(opt, (int __user *)optval)) + if (copy_to_iter(&opt, sizeof(opt), &sopt->iter_out) != + sizeof(opt)) err = -EFAULT; break; @@ -2114,7 +2116,7 @@ static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname, } len = min_t(unsigned int, len, sizeof(uf)); - if (copy_to_user(optval, &uf, len)) + if (copy_to_iter(&uf, len, &sopt->iter_out) != len) err = -EFAULT; break; @@ -2129,16 +2131,16 @@ static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname, } static int hci_sock_getsockopt(struct socket *sock, int level, int optname, - char __user *optval, int __user *optlen) + sockopt_t *sopt) { struct sock *sk = sock->sk; int err = 0; + u16 mtu; BT_DBG("sk %p, opt %d", sk, optname); if (level == SOL_HCI) - return hci_sock_getsockopt_old(sock, level, optname, optval, - optlen); + return hci_sock_getsockopt_old(sock, level, optname, sopt); if (level != SOL_BLUETOOTH) return -ENOPROTOOPT; @@ -2148,7 +2150,9 @@ static int hci_sock_getsockopt(struct socket *sock, int level, int optname, switch (optname) { case BT_SNDMTU: case BT_RCVMTU: - if (put_user(hci_pi(sk)->mtu, (u16 __user *)optval)) + mtu = hci_pi(sk)->mtu; + if (copy_to_iter(&mtu, sizeof(mtu), &sopt->iter_out) != + sizeof(mtu)) err = -EFAULT; break; @@ -2185,7 +2189,7 @@ static const struct proto_ops hci_sock_ops = { .listen = sock_no_listen, .shutdown = sock_no_shutdown, .setsockopt = hci_sock_setsockopt, - .getsockopt = hci_sock_getsockopt, + .getsockopt_iter = hci_sock_getsockopt, .connect = sock_no_connect, .socketpair = sock_no_socketpair, .accept = sock_no_accept, -- 2.53.0-Meta
