7 files changed, 22 insertions, 50 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index ef64cec42804..ab0bc43c82a4 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2644,24 +2644,17 @@ struct sk_buff *skb_recv_datagram(struct sock *sk, unsigned flags, int noblock,
                                   int *err);
 unsigned int datagram_poll(struct file *file, struct socket *sock,
                            struct poll_table_struct *wait);
-int skb_copy_datagram_iovec(const struct sk_buff *from, int offset,
-                            struct iovec *to, int size);
+int skb_copy_datagram_iter(const struct sk_buff *from, int offset,
+                           struct iov_iter *to, int size);
 static inline int skb_copy_datagram_msg(const struct sk_buff *from, int offset,
                                         struct msghdr *msg, int size)
 {
-        return skb_copy_datagram_iovec(from, offset, msg->msg_iov, size);
-}
-int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb, int hlen,
-                                     struct iovec *iov);
-static inline int skb_copy_and_csum_datagram_msg(struct sk_buff *skb, int hlen,
-                            struct msghdr *msg)
-{
-        return skb_copy_and_csum_datagram_iovec(skb, hlen, msg->msg_iov);
+        return skb_copy_datagram_iter(from, offset, &msg->msg_iter, size);
 }
+int skb_copy_and_csum_datagram_msg(struct sk_buff *skb, int hlen,
+                                   struct msghdr *msg);
 int skb_copy_datagram_from_iter(struct sk_buff *skb, int offset,
                                  struct iov_iter *from, int len);
-int skb_copy_datagram_iter(const struct sk_buff *from, int offset,
-                           struct iov_iter *to, int size);
 int zerocopy_sg_from_iter(struct sk_buff *skb, struct iov_iter *frm);
 void skb_free_datagram(struct sock *sk, struct sk_buff *skb);
 void skb_free_datagram_locked(struct sock *sk, struct sk_buff *skb);
@@ -2689,12 +2682,13 @@ int skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci);
 
 static inline int memcpy_from_msg(void *data, struct msghdr *msg, int len)
 {
-        return memcpy_fromiovec(data, msg->msg_iov, len);
+        /* XXX: stripping const */
+        return memcpy_fromiovec(data, (struct iovec *)msg->msg_iter.iov, len);
 }
 
 static inline int memcpy_to_msg(struct msghdr *msg, void *data, int len)
 {
-        return memcpy_toiovec(msg->msg_iov, data, len);
+        return copy_to_iter(data, len, &msg->msg_iter) == len ? 0 : -EFAULT;
 }
 
 struct skb_checksum_ops {
diff --git a/include/linux/socket.h b/include/linux/socket.h
index de5222832be4..048d6d6eed6d 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -47,8 +47,7 @@ struct linger {
 struct msghdr {
         void            *msg_name;      /* ptr to socket address structure */
         int             msg_namelen;    /* size of socket address structure */
-        struct iovec    *msg_iov;       /* scatter/gather array */
-        __kernel_size_t msg_iovlen;     /* # elements in msg_iov */
+        struct iov_iter msg_iter;       /* data */
         void            *msg_control;   /* ancillary data */
         __kernel_size_t msg_controllen; /* ancillary data buffer length */
         unsigned int    msg_flags;      /* flags on received message */
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 3fa0a9669a3a..67309ece0772 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -162,7 +162,7 @@ struct tcp_sock {
         struct {
                 struct sk_buff_head     prequeue;
                 struct task_struct      *task;
-                struct iovec            *iov;
+                struct msghdr           *msg;
                 int                     memory;
                 int                     len;
         } ucopy;
diff --git a/include/linux/uio.h b/include/linux/uio.h
index 9b1581414cd4..a41e252396c0 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -31,6 +31,7 @@ struct iov_iter {
         size_t count;
         union {
                 const struct iovec *iov;
+                const struct kvec *kvec;
                 const struct bio_vec *bvec;
         };
         unsigned long nr_segs;
@@ -82,10 +83,13 @@ size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes,
                          struct iov_iter *i);
 size_t copy_to_iter(void *addr, size_t bytes, struct iov_iter *i);
 size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i);
+size_t copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i);
 size_t iov_iter_zero(size_t bytes, struct iov_iter *);
 unsigned long iov_iter_alignment(const struct iov_iter *i);
 void iov_iter_init(struct iov_iter *i, int direction, const struct iovec *iov,
                         unsigned long nr_segs, size_t count);
+void iov_iter_kvec(struct iov_iter *i, int direction, const struct kvec *iov,
+                        unsigned long nr_segs, size_t count);
 ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages,
                         size_t maxsize, unsigned maxpages, size_t *start);
 ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, struct page ***pages,
@@ -123,9 +127,10 @@ static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
 {
         i->count = count;
 }
+size_t csum_and_copy_to_iter(void *addr, size_t bytes, __wsum *csum, struct iov_iter *i);
+size_t csum_and_copy_from_iter(void *addr, size_t bytes, __wsum *csum, struct iov_iter *i);
 
 int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
-int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len);
 int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov,
                         int offset, int len);
 int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata,
diff --git a/include/linux/vmw_vmci_api.h b/include/linux/vmw_vmci_api.h
index 023430e265fe..5691f752ce8f 100644
--- a/include/linux/vmw_vmci_api.h
+++ b/include/linux/vmw_vmci_api.h
@@ -24,6 +24,7 @@
 #define VMCI_KERNEL_API_VERSION_2 2
 #define VMCI_KERNEL_API_VERSION   VMCI_KERNEL_API_VERSION_2
 
+struct msghdr;
 typedef void (vmci_device_shutdown_fn) (void *device_registration,
                                         void *user_data);
 
@@ -75,8 +76,8 @@ ssize_t vmci_qpair_peek(struct vmci_qp *qpair, void *buf, size_t buf_size,
 ssize_t vmci_qpair_enquev(struct vmci_qp *qpair,
                           void *iov, size_t iov_size, int mode);
 ssize_t vmci_qpair_dequev(struct vmci_qp *qpair,
-                          void *iov, size_t iov_size, int mode);
-ssize_t vmci_qpair_peekv(struct vmci_qp *qpair, void *iov, size_t iov_size,
+                          struct msghdr *msg, size_t iov_size, int mode);
+ssize_t vmci_qpair_peekv(struct vmci_qp *qpair, struct msghdr *msg, size_t iov_size,
                          int mode);
 
 #endif /* !__VMW_VMCI_API_H__ */
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index eee3ef530e79..d1bb342d083f 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -608,10 +608,6 @@ struct l2cap_ops {
         struct sk_buff          *(*alloc_skb) (struct l2cap_chan *chan,
                                                unsigned long hdr_len,
                                                unsigned long len, int nb);
-        int                     (*memcpy_fromiovec) (struct l2cap_chan *chan,
-                                                     unsigned char *kdata,
-                                                     struct iovec *iov,
-                                                     int len);
 };
 
 struct l2cap_conn {
@@ -905,31 +901,6 @@ static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
         return 0;
 }
 
-static inline int l2cap_chan_no_memcpy_fromiovec(struct l2cap_chan *chan,
-                                                 unsigned char *kdata,
-                                                 struct iovec *iov,
-                                                 int len)
-{
-        /* Following is safe since for compiler definitions of kvec and
-         * iovec are identical, yielding the same in-core layout and alignment
-         */
-        struct kvec *vec = (struct kvec *)iov;
-
-        while (len > 0) {
-                if (vec->iov_len) {
-                        int copy = min_t(unsigned int, len, vec->iov_len);
-                        memcpy(kdata, vec->iov_base, copy);
-                        len -= copy;
-                        kdata += copy;
-                        vec->iov_base += copy;
-                        vec->iov_len -= copy;
-                }
-                vec++;
-        }
-
-        return 0;
-}
-
 extern bool disable_ertm;
 
 int l2cap_init_sockets(void);
diff --git a/include/net/udplite.h b/include/net/udplite.h
index 9a28a5179400..ae7c8d1fbcad 100644
--- a/include/net/udplite.h
+++ b/include/net/udplite.h
@@ -19,7 +19,9 @@ extern struct udp_table		udplite_table;
 static __inline__ int udplite_getfrag(void *from, char *to, int  offset,
                                       int len, int odd, struct sk_buff *skb)
 {
-        return memcpy_fromiovecend(to, (struct iovec *) from, offset, len);
+        struct msghdr *msg = from;
+        /* XXX: stripping const */
+        return memcpy_fromiovecend(to, (struct iovec *)msg->msg_iter.iov, offset, len);
 }
 
 /* Designate sk as UDP-Lite socket */