Restoring authorship annotation for <[email protected]>. Commit 2 of 2.

1 files changed, 214 insertions, 214 deletions

diff --git a/contrib/libs/linux-headers/linux/virtio_ring.h b/contrib/libs/linux-headers/linux/virtio_ring.h
index 475cf916988..7ecb290fa01 100644
--- a/contrib/libs/linux-headers/linux/virtio_ring.h
+++ b/contrib/libs/linux-headers/linux/virtio_ring.h
@@ -1,214 +1,214 @@
-#ifndef _LINUX_VIRTIO_RING_H 
-#define _LINUX_VIRTIO_RING_H 
-/* An interface for efficient virtio implementation, currently for use by KVM, 
- * but hopefully others soon.  Do NOT change this since it will 
- * break existing servers and clients. 
- * 
- * This header is BSD licensed so anyone can use the definitions to implement 
- * compatible drivers/servers. 
- * 
- * Redistribution and use in source and binary forms, with or without 
- * modification, are permitted provided that the following conditions 
- * are met: 
- * 1. Redistributions of source code must retain the above copyright 
- *    notice, this list of conditions and the following disclaimer. 
- * 2. Redistributions in binary form must reproduce the above copyright 
- *    notice, this list of conditions and the following disclaimer in the 
- *    documentation and/or other materials provided with the distribution. 
- * 3. Neither the name of IBM nor the names of its contributors 
- *    may be used to endorse or promote products derived from this software 
- *    without specific prior written permission. 
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND 
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
- * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE 
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
- * SUCH DAMAGE. 
- * 
- * Copyright Rusty Russell IBM Corporation 2007. */ 
-#include <stdint.h> 
-#include <linux/types.h> 
-#include <linux/virtio_types.h> 
- 
-/* This marks a buffer as continuing via the next field. */ 
-#define VRING_DESC_F_NEXT	1 
-/* This marks a buffer as write-only (otherwise read-only). */ 
-#define VRING_DESC_F_WRITE	2 
-/* This means the buffer contains a list of buffer descriptors. */ 
-#define VRING_DESC_F_INDIRECT	4 
- 
-/* 
- * Mark a descriptor as available or used in packed ring. 
- * Notice: they are defined as shifts instead of shifted values. 
- */ 
-#define VRING_PACKED_DESC_F_AVAIL	7 
-#define VRING_PACKED_DESC_F_USED	15 
- 
-/* The Host uses this in used->flags to advise the Guest: don't kick me when 
- * you add a buffer.  It's unreliable, so it's simply an optimization.  Guest 
- * will still kick if it's out of buffers. */ 
-#define VRING_USED_F_NO_NOTIFY	1 
-/* The Guest uses this in avail->flags to advise the Host: don't interrupt me 
- * when you consume a buffer.  It's unreliable, so it's simply an 
- * optimization.  */ 
-#define VRING_AVAIL_F_NO_INTERRUPT	1 
- 
-/* Enable events in packed ring. */ 
-#define VRING_PACKED_EVENT_FLAG_ENABLE	0x0 
-/* Disable events in packed ring. */ 
-#define VRING_PACKED_EVENT_FLAG_DISABLE	0x1 
-/* 
- * Enable events for a specific descriptor in packed ring. 
- * (as specified by Descriptor Ring Change Event Offset/Wrap Counter). 
- * Only valid if VIRTIO_RING_F_EVENT_IDX has been negotiated. 
- */ 
-#define VRING_PACKED_EVENT_FLAG_DESC	0x2 
- 
-/* 
- * Wrap counter bit shift in event suppression structure 
- * of packed ring. 
- */ 
-#define VRING_PACKED_EVENT_F_WRAP_CTR	15 
- 
-/* We support indirect buffer descriptors */ 
-#define VIRTIO_RING_F_INDIRECT_DESC	28 
- 
-/* The Guest publishes the used index for which it expects an interrupt 
- * at the end of the avail ring. Host should ignore the avail->flags field. */ 
-/* The Host publishes the avail index for which it expects a kick 
- * at the end of the used ring. Guest should ignore the used->flags field. */ 
-#define VIRTIO_RING_F_EVENT_IDX		29 
- 
-/* Virtio ring descriptors: 16 bytes.  These can chain together via "next". */ 
-struct vring_desc { 
-	/* Address (guest-physical). */ 
-	__virtio64 addr; 
-	/* Length. */ 
-	__virtio32 len; 
-	/* The flags as indicated above. */ 
-	__virtio16 flags; 
-	/* We chain unused descriptors via this, too */ 
-	__virtio16 next; 
-}; 
- 
-struct vring_avail { 
-	__virtio16 flags; 
-	__virtio16 idx; 
-	__virtio16 ring[]; 
-}; 
- 
-/* u32 is used here for ids for padding reasons. */ 
-struct vring_used_elem { 
-	/* Index of start of used descriptor chain. */ 
-	__virtio32 id; 
-	/* Total length of the descriptor chain which was used (written to) */ 
-	__virtio32 len; 
-}; 
- 
-struct vring_used { 
-	__virtio16 flags; 
-	__virtio16 idx; 
-	struct vring_used_elem ring[]; 
-}; 
- 
-struct vring { 
-	unsigned int num; 
- 
-	struct vring_desc *desc; 
- 
-	struct vring_avail *avail; 
- 
-	struct vring_used *used; 
-}; 
- 
-/* Alignment requirements for vring elements. 
- * When using pre-virtio 1.0 layout, these fall out naturally. 
- */ 
-#define VRING_AVAIL_ALIGN_SIZE 2 
-#define VRING_USED_ALIGN_SIZE 4 
-#define VRING_DESC_ALIGN_SIZE 16 
- 
-/* The standard layout for the ring is a continuous chunk of memory which looks 
- * like this.  We assume num is a power of 2. 
- * 
- * struct vring 
- * { 
- *	// The actual descriptors (16 bytes each) 
- *	struct vring_desc desc[num]; 
- * 
- *	// A ring of available descriptor heads with free-running index. 
- *	__virtio16 avail_flags; 
- *	__virtio16 avail_idx; 
- *	__virtio16 available[num]; 
- *	__virtio16 used_event_idx; 
- * 
- *	// Padding to the next align boundary. 
- *	char pad[]; 
- * 
- *	// A ring of used descriptor heads with free-running index. 
- *	__virtio16 used_flags; 
- *	__virtio16 used_idx; 
- *	struct vring_used_elem used[num]; 
- *	__virtio16 avail_event_idx; 
- * }; 
- */ 
-/* We publish the used event index at the end of the available ring, and vice 
- * versa. They are at the end for backwards compatibility. */ 
-#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num]) 
-#define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num]) 
- 
-static __inline__ void vring_init(struct vring *vr, unsigned int num, void *p, 
-			      unsigned long align) 
-{ 
-	vr->num = num; 
-	vr->desc = p; 
-	vr->avail = (struct vring_avail *)((char *)p + num * sizeof(struct vring_desc)); 
-	vr->used = (void *)(((uintptr_t)&vr->avail->ring[num] + sizeof(__virtio16) 
-		+ align-1) & ~(align - 1)); 
-} 
- 
-static __inline__ unsigned vring_size(unsigned int num, unsigned long align) 
-{ 
-	return ((sizeof(struct vring_desc) * num + sizeof(__virtio16) * (3 + num) 
-		 + align - 1) & ~(align - 1)) 
-		+ sizeof(__virtio16) * 3 + sizeof(struct vring_used_elem) * num; 
-} 
- 
-/* The following is used with USED_EVENT_IDX and AVAIL_EVENT_IDX */ 
-/* Assuming a given event_idx value from the other side, if 
- * we have just incremented index from old to new_idx, 
- * should we trigger an event? */ 
-static __inline__ int vring_need_event(__u16 event_idx, __u16 new_idx, __u16 old) 
-{ 
-	/* Note: Xen has similar logic for notification hold-off 
-	 * in include/xen/interface/io/ring.h with req_event and req_prod 
-	 * corresponding to event_idx + 1 and new_idx respectively. 
-	 * Note also that req_event and req_prod in Xen start at 1, 
-	 * event indexes in virtio start at 0. */ 
-	return (__u16)(new_idx - event_idx - 1) < (__u16)(new_idx - old); 
-} 
- 
-struct vring_packed_desc_event { 
-	/* Descriptor Ring Change Event Offset/Wrap Counter. */ 
-	__le16 off_wrap; 
-	/* Descriptor Ring Change Event Flags. */ 
-	__le16 flags; 
-}; 
- 
-struct vring_packed_desc { 
-	/* Buffer Address. */ 
-	__le64 addr; 
-	/* Buffer Length. */ 
-	__le32 len; 
-	/* Buffer ID. */ 
-	__le16 id; 
-	/* The flags depending on descriptor type. */ 
-	__le16 flags; 
-}; 
- 
-#endif /* _LINUX_VIRTIO_RING_H */ 
+#ifndef _LINUX_VIRTIO_RING_H
+#define _LINUX_VIRTIO_RING_H
+/* An interface for efficient virtio implementation, currently for use by KVM,
+ * but hopefully others soon.  Do NOT change this since it will
+ * break existing servers and clients.
+ *
+ * This header is BSD licensed so anyone can use the definitions to implement
+ * compatible drivers/servers.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of IBM nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Copyright Rusty Russell IBM Corporation 2007. */
+#include <stdint.h>
+#include <linux/types.h>
+#include <linux/virtio_types.h>
+
+/* This marks a buffer as continuing via the next field. */
+#define VRING_DESC_F_NEXT	1
+/* This marks a buffer as write-only (otherwise read-only). */
+#define VRING_DESC_F_WRITE	2
+/* This means the buffer contains a list of buffer descriptors. */
+#define VRING_DESC_F_INDIRECT	4
+
+/*
+ * Mark a descriptor as available or used in packed ring.
+ * Notice: they are defined as shifts instead of shifted values.
+ */
+#define VRING_PACKED_DESC_F_AVAIL	7
+#define VRING_PACKED_DESC_F_USED	15
+
+/* The Host uses this in used->flags to advise the Guest: don't kick me when
+ * you add a buffer.  It's unreliable, so it's simply an optimization.  Guest
+ * will still kick if it's out of buffers. */
+#define VRING_USED_F_NO_NOTIFY	1
+/* The Guest uses this in avail->flags to advise the Host: don't interrupt me
+ * when you consume a buffer.  It's unreliable, so it's simply an
+ * optimization.  */
+#define VRING_AVAIL_F_NO_INTERRUPT	1
+
+/* Enable events in packed ring. */
+#define VRING_PACKED_EVENT_FLAG_ENABLE	0x0
+/* Disable events in packed ring. */
+#define VRING_PACKED_EVENT_FLAG_DISABLE	0x1
+/*
+ * Enable events for a specific descriptor in packed ring.
+ * (as specified by Descriptor Ring Change Event Offset/Wrap Counter).
+ * Only valid if VIRTIO_RING_F_EVENT_IDX has been negotiated.
+ */
+#define VRING_PACKED_EVENT_FLAG_DESC	0x2
+
+/*
+ * Wrap counter bit shift in event suppression structure
+ * of packed ring.
+ */
+#define VRING_PACKED_EVENT_F_WRAP_CTR	15
+
+/* We support indirect buffer descriptors */
+#define VIRTIO_RING_F_INDIRECT_DESC	28
+
+/* The Guest publishes the used index for which it expects an interrupt
+ * at the end of the avail ring. Host should ignore the avail->flags field. */
+/* The Host publishes the avail index for which it expects a kick
+ * at the end of the used ring. Guest should ignore the used->flags field. */
+#define VIRTIO_RING_F_EVENT_IDX		29
+
+/* Virtio ring descriptors: 16 bytes.  These can chain together via "next". */
+struct vring_desc {
+	/* Address (guest-physical). */
+	__virtio64 addr;
+	/* Length. */
+	__virtio32 len;
+	/* The flags as indicated above. */
+	__virtio16 flags;
+	/* We chain unused descriptors via this, too */
+	__virtio16 next;
+};
+
+struct vring_avail {
+	__virtio16 flags;
+	__virtio16 idx;
+	__virtio16 ring[];
+};
+
+/* u32 is used here for ids for padding reasons. */
+struct vring_used_elem {
+	/* Index of start of used descriptor chain. */
+	__virtio32 id;
+	/* Total length of the descriptor chain which was used (written to) */
+	__virtio32 len;
+};
+
+struct vring_used {
+	__virtio16 flags;
+	__virtio16 idx;
+	struct vring_used_elem ring[];
+};
+
+struct vring {
+	unsigned int num;
+
+	struct vring_desc *desc;
+
+	struct vring_avail *avail;
+
+	struct vring_used *used;
+};
+
+/* Alignment requirements for vring elements.
+ * When using pre-virtio 1.0 layout, these fall out naturally.
+ */
+#define VRING_AVAIL_ALIGN_SIZE 2
+#define VRING_USED_ALIGN_SIZE 4
+#define VRING_DESC_ALIGN_SIZE 16
+
+/* The standard layout for the ring is a continuous chunk of memory which looks
+ * like this.  We assume num is a power of 2.
+ *
+ * struct vring
+ * {
+ *	// The actual descriptors (16 bytes each)
+ *	struct vring_desc desc[num];
+ *
+ *	// A ring of available descriptor heads with free-running index.
+ *	__virtio16 avail_flags;
+ *	__virtio16 avail_idx;
+ *	__virtio16 available[num];
+ *	__virtio16 used_event_idx;
+ *
+ *	// Padding to the next align boundary.
+ *	char pad[];
+ *
+ *	// A ring of used descriptor heads with free-running index.
+ *	__virtio16 used_flags;
+ *	__virtio16 used_idx;
+ *	struct vring_used_elem used[num];
+ *	__virtio16 avail_event_idx;
+ * };
+ */
+/* We publish the used event index at the end of the available ring, and vice
+ * versa. They are at the end for backwards compatibility. */
+#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
+#define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num])
+
+static __inline__ void vring_init(struct vring *vr, unsigned int num, void *p,
+			      unsigned long align)
+{
+	vr->num = num;
+	vr->desc = p;
+	vr->avail = (struct vring_avail *)((char *)p + num * sizeof(struct vring_desc));
+	vr->used = (void *)(((uintptr_t)&vr->avail->ring[num] + sizeof(__virtio16)
+		+ align-1) & ~(align - 1));
+}
+
+static __inline__ unsigned vring_size(unsigned int num, unsigned long align)
+{
+	return ((sizeof(struct vring_desc) * num + sizeof(__virtio16) * (3 + num)
+		 + align - 1) & ~(align - 1))
+		+ sizeof(__virtio16) * 3 + sizeof(struct vring_used_elem) * num;
+}
+
+/* The following is used with USED_EVENT_IDX and AVAIL_EVENT_IDX */
+/* Assuming a given event_idx value from the other side, if
+ * we have just incremented index from old to new_idx,
+ * should we trigger an event? */
+static __inline__ int vring_need_event(__u16 event_idx, __u16 new_idx, __u16 old)
+{
+	/* Note: Xen has similar logic for notification hold-off
+	 * in include/xen/interface/io/ring.h with req_event and req_prod
+	 * corresponding to event_idx + 1 and new_idx respectively.
+	 * Note also that req_event and req_prod in Xen start at 1,
+	 * event indexes in virtio start at 0. */
+	return (__u16)(new_idx - event_idx - 1) < (__u16)(new_idx - old);
+}
+
+struct vring_packed_desc_event {
+	/* Descriptor Ring Change Event Offset/Wrap Counter. */
+	__le16 off_wrap;
+	/* Descriptor Ring Change Event Flags. */
+	__le16 flags;
+};
+
+struct vring_packed_desc {
+	/* Buffer Address. */
+	__le64 addr;
+	/* Buffer Length. */
+	__le32 len;
+	/* Buffer ID. */
+	__le16 id;
+	/* The flags depending on descriptor type. */
+	__le16 flags;
+};
+
+#endif /* _LINUX_VIRTIO_RING_H */