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-rw-r--r--net/unix/af_unix.c80
-rw-r--r--net/unix/diag.c1
2 files changed, 45 insertions, 36 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index c4ce243824b..c1f403bed68 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1246,6 +1246,15 @@ static int unix_socketpair(struct socket *socka, struct socket *sockb)
return 0;
}
+static void unix_sock_inherit_flags(const struct socket *old,
+ struct socket *new)
+{
+ if (test_bit(SOCK_PASSCRED, &old->flags))
+ set_bit(SOCK_PASSCRED, &new->flags);
+ if (test_bit(SOCK_PASSSEC, &old->flags))
+ set_bit(SOCK_PASSSEC, &new->flags);
+}
+
static int unix_accept(struct socket *sock, struct socket *newsock, int flags)
{
struct sock *sk = sock->sk;
@@ -1280,6 +1289,7 @@ static int unix_accept(struct socket *sock, struct socket *newsock, int flags)
/* attach accepted sock to socket */
unix_state_lock(tsk);
newsock->state = SS_CONNECTED;
+ unix_sock_inherit_flags(sock, newsock);
sock_graft(tsk, newsock);
unix_state_unlock(tsk);
return 0;
@@ -1479,7 +1489,8 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
MAX_SKB_FRAGS * PAGE_SIZE);
skb = sock_alloc_send_pskb(sk, len - data_len, data_len,
- msg->msg_flags & MSG_DONTWAIT, &err);
+ msg->msg_flags & MSG_DONTWAIT, &err,
+ PAGE_ALLOC_COSTLY_ORDER);
if (skb == NULL)
goto out;
@@ -1596,6 +1607,10 @@ out:
return err;
}
+/* We use paged skbs for stream sockets, and limit occupancy to 32768
+ * bytes, and a minimun of a full page.
+ */
+#define UNIX_SKB_FRAGS_SZ (PAGE_SIZE << get_order(32768))
static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock,
struct msghdr *msg, size_t len)
@@ -1609,6 +1624,7 @@ static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock,
struct scm_cookie tmp_scm;
bool fds_sent = false;
int max_level;
+ int data_len;
if (NULL == siocb->scm)
siocb->scm = &tmp_scm;
@@ -1635,40 +1651,22 @@ static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock,
goto pipe_err;
while (sent < len) {
- /*
- * Optimisation for the fact that under 0.01% of X
- * messages typically need breaking up.
- */
-
- size = len-sent;
+ size = len - sent;
/* Keep two messages in the pipe so it schedules better */
- if (size > ((sk->sk_sndbuf >> 1) - 64))
- size = (sk->sk_sndbuf >> 1) - 64;
+ size = min_t(int, size, (sk->sk_sndbuf >> 1) - 64);
- if (size > SKB_MAX_ALLOC)
- size = SKB_MAX_ALLOC;
+ /* allow fallback to order-0 allocations */
+ size = min_t(int, size, SKB_MAX_HEAD(0) + UNIX_SKB_FRAGS_SZ);
- /*
- * Grab a buffer
- */
+ data_len = max_t(int, 0, size - SKB_MAX_HEAD(0));
- skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT,
- &err);
-
- if (skb == NULL)
+ skb = sock_alloc_send_pskb(sk, size - data_len, data_len,
+ msg->msg_flags & MSG_DONTWAIT, &err,
+ get_order(UNIX_SKB_FRAGS_SZ));
+ if (!skb)
goto out_err;
- /*
- * If you pass two values to the sock_alloc_send_skb
- * it tries to grab the large buffer with GFP_NOFS
- * (which can fail easily), and if it fails grab the
- * fallback size buffer which is under a page and will
- * succeed. [Alan]
- */
- size = min_t(int, size, skb_tailroom(skb));
-
-
/* Only send the fds in the first buffer */
err = unix_scm_to_skb(siocb->scm, skb, !fds_sent);
if (err < 0) {
@@ -1678,7 +1676,11 @@ static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock,
max_level = err + 1;
fds_sent = true;
- err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
+ skb_put(skb, size - data_len);
+ skb->data_len = data_len;
+ skb->len = size;
+ err = skb_copy_datagram_from_iovec(skb, 0, msg->msg_iov,
+ sent, size);
if (err) {
kfree_skb(skb);
goto out_err;
@@ -1890,6 +1892,11 @@ static long unix_stream_data_wait(struct sock *sk, long timeo,
return timeo;
}
+static unsigned int unix_skb_len(const struct sk_buff *skb)
+{
+ return skb->len - UNIXCB(skb).consumed;
+}
+
static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
@@ -1977,8 +1984,8 @@ again:
}
skip = sk_peek_offset(sk, flags);
- while (skip >= skb->len) {
- skip -= skb->len;
+ while (skip >= unix_skb_len(skb)) {
+ skip -= unix_skb_len(skb);
last = skb;
skb = skb_peek_next(skb, &sk->sk_receive_queue);
if (!skb)
@@ -2005,8 +2012,9 @@ again:
sunaddr = NULL;
}
- chunk = min_t(unsigned int, skb->len - skip, size);
- if (memcpy_toiovec(msg->msg_iov, skb->data + skip, chunk)) {
+ chunk = min_t(unsigned int, unix_skb_len(skb) - skip, size);
+ if (skb_copy_datagram_iovec(skb, UNIXCB(skb).consumed + skip,
+ msg->msg_iov, chunk)) {
if (copied == 0)
copied = -EFAULT;
break;
@@ -2016,14 +2024,14 @@ again:
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
- skb_pull(skb, chunk);
+ UNIXCB(skb).consumed += chunk;
sk_peek_offset_bwd(sk, chunk);
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
- if (skb->len)
+ if (unix_skb_len(skb))
break;
skb_unlink(skb, &sk->sk_receive_queue);
@@ -2107,7 +2115,7 @@ long unix_inq_len(struct sock *sk)
if (sk->sk_type == SOCK_STREAM ||
sk->sk_type == SOCK_SEQPACKET) {
skb_queue_walk(&sk->sk_receive_queue, skb)
- amount += skb->len;
+ amount += unix_skb_len(skb);
} else {
skb = skb_peek(&sk->sk_receive_queue);
if (skb)
diff --git a/net/unix/diag.c b/net/unix/diag.c
index d591091603b..86fa0f3b2ca 100644
--- a/net/unix/diag.c
+++ b/net/unix/diag.c
@@ -124,6 +124,7 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_r
rep->udiag_family = AF_UNIX;
rep->udiag_type = sk->sk_type;
rep->udiag_state = sk->sk_state;
+ rep->pad = 0;
rep->udiag_ino = sk_ino;
sock_diag_save_cookie(sk, rep->udiag_cookie);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-08 11:01:04 +0000