SLFO-pool/hyper-v
SHA256
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Sync from SUSE:SLFO:Main hyper-v revision 920028c3cd1dd098469a5e5be0869e26

Browse Source
This commit is contained in:
Adrian Schröter 2024-10-30 16:12:35 +01:00
parent daefaea87c
commit b3b43e70eb
8 changed files with 1537 additions and 1003 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
hyper-v.changes
View File

@ -1,3 +1,25 @@
-------------------------------------------------------------------
Tue Oct 22 22:22:22 UTC 2024 - ohering@suse.de
- Add memory allocation check in hv_fcopy_start (94e86b17)
- suppress the invalid warning for packed member alignment (207e03b0)
- Add new fcopy application based on uio driver (82b0945c)
- Add vmbus_bufring (45bab4d7)
- kvp: Handle IPv4 and Ipv6 combination for keyfile format (f971f6dd)
- kvp: Some small fixes for handling NM keyfiles (c3803203)
- kvp: Support for keyfile based connection profile (42999c90)
- kvp: remove unnecessary (void*) conversions (22589542)
- Remove an extraneous "the" (f15f39fa)
- change http to https in hv_kvp_daemon.c (fa52a4b2)
- replace the copy of include/linux/hyperv.h with include/uapi/linux/hyperv.h (6de74d10)
- merge individual udev rules files into a single rules file
- package only files, not directories already owned by filesystem.rpm
- remove braces from rpm spec macros
- remove obsolete Group tag
- replace RPM_BUILD_ROOT with buildroot
- use a meaningful name for the UAPI include file
- use a meaningful variable name for ifcfg in hv_set_ifconfig.sh
------------------------------------------------------------------- -------------------------------------------------------------------
Tue Apr 23 10:01:10 UTC 2024 - pgajdos@suse.com Tue Apr 23 10:01:10 UTC 2024 - pgajdos@suse.com

917
hyper-v.include.linux.hyperv.h
View File

@ -1,3 +1,4 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* /*
* *
* Copyright (c) 2011, Microsoft Corporation. * Copyright (c) 2011, Microsoft Corporation.
@ -22,14 +23,21 @@
* *
*/ */
#ifndef _HYPERV_H #ifndef _UAPI_HYPERV_H
#define _HYPERV_H #define _UAPI_HYPERV_H
#include <linux/types.h> #include <linux/types.h>
/* from linux/uuid.h */
typedef struct { /*
__u8 b[16]; * Framework version for util services.
} uuid_le; */
#define UTIL_FW_MINOR 0
#define UTIL_WS2K8_FW_MAJOR 1
#define UTIL_WS2K8_FW_VERSION (UTIL_WS2K8_FW_MAJOR << 16 | UTIL_FW_MINOR)
#define UTIL_FW_MAJOR 3
#define UTIL_FW_VERSION (UTIL_FW_MAJOR << 16 | UTIL_FW_MINOR)
/* /*
@ -82,6 +90,17 @@ struct hv_vss_check_dm_info {
__u32 flags; __u32 flags;
} __attribute__((packed)); } __attribute__((packed));
/*
* struct hv_vss_msg encodes the fields that the Linux VSS
* driver accesses. However, FREEZE messages from Hyper-V contain
* additional LUN information that Linux doesn't use and are not
* represented in struct hv_vss_msg. A received FREEZE message may
* be as large as 6,260 bytes, so the driver must allocate at least
* that much space, not sizeof(struct hv_vss_msg). Other messages
* such as AUTO_RECOVER may be as large as 12,500 bytes. However,
* because the Linux VSS driver responds that it doesn't support
* auto-recovery, it should not receive such messages.
*/
struct hv_vss_msg { struct hv_vss_msg {
union { union {
struct hv_vss_hdr vss_hdr; struct hv_vss_hdr vss_hdr;
@ -93,7 +112,6 @@ struct hv_vss_msg {
}; };
} __attribute__((packed)); } __attribute__((packed));
/* /*
* Implementation of a host to guest copy facility. * Implementation of a host to guest copy facility.
*/ */
@ -112,8 +130,8 @@ enum hv_fcopy_op {
struct hv_fcopy_hdr { struct hv_fcopy_hdr {
__u32 operation; __u32 operation;
uuid_le service_id0; /* currently unused */ __u8 service_id0[16]; /* currently unused */
uuid_le service_id1; /* currently unused */ __u8 service_id1[16]; /* currently unused */
} __attribute__((packed)); } __attribute__((packed));
#define OVER_WRITE 0x1 #define OVER_WRITE 0x1
@ -140,7 +158,6 @@ struct hv_do_fcopy {
__u8 data[DATA_FRAGMENT]; __u8 data[DATA_FRAGMENT];
} __attribute__((packed)); } __attribute__((packed));
/* /*
* An implementation of HyperV key value pair (KVP) functionality for Linux. * An implementation of HyperV key value pair (KVP) functionality for Linux.
* *
@ -213,7 +230,7 @@ struct hv_do_fcopy {
* kernel and user-level daemon communicate using a connector channel. * kernel and user-level daemon communicate using a connector channel.
* *
* The user mode component first registers with the * The user mode component first registers with the
* the kernel component. Subsequently, the kernel component requests, data * kernel component. Subsequently, the kernel component requests, data
* for the specified keys. In response to this message the user mode component * for the specified keys. In response to this message the user mode component
* fills in the value corresponding to the specified key. We overload the * fills in the value corresponding to the specified key. We overload the
* sequence field in the cn_msg header to define our KVP message types. * sequence field in the cn_msg header to define our KVP message types.
@ -391,880 +408,4 @@ struct hv_kvp_ip_msg {
struct hv_kvp_ipaddr_value kvp_ip_val; struct hv_kvp_ipaddr_value kvp_ip_val;
} __attribute__((packed)); } __attribute__((packed));
#ifdef __KERNEL__ #endif /* _UAPI_HYPERV_H */
#include <linux/scatterlist.h>
#include <linux/list.h>
#include <linux/uuid.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/completion.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#define MAX_PAGE_BUFFER_COUNT 19
#define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
#pragma pack(push, 1)
/* Single-page buffer */
struct hv_page_buffer {
u32 len;
u32 offset;
u64 pfn;
};
/* Multiple-page buffer */
struct hv_multipage_buffer {
/* Length and Offset determines the # of pfns in the array */
u32 len;
u32 offset;
u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
};
/* 0x18 includes the proprietary packet header */
#define MAX_PAGE_BUFFER_PACKET (0x18 + \
(sizeof(struct hv_page_buffer) * \
MAX_PAGE_BUFFER_COUNT))
#define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \
sizeof(struct hv_multipage_buffer))
#pragma pack(pop)
struct hv_ring_buffer {
/* Offset in bytes from the start of ring data below */
u32 write_index;
/* Offset in bytes from the start of ring data below */
u32 read_index;
u32 interrupt_mask;
/* Pad it to PAGE_SIZE so that data starts on page boundary */
u8 reserved[4084];
/* NOTE:
* The interrupt_mask field is used only for channels but since our
* vmbus connection also uses this data structure and its data starts
* here, we commented out this field.
*/
/*
* Ring data starts here + RingDataStartOffset
* !!! DO NOT place any fields below this !!!
*/
u8 buffer[0];
} __packed;
struct hv_ring_buffer_info {
struct hv_ring_buffer *ring_buffer;
u32 ring_size; /* Include the shared header */
spinlock_t ring_lock;
u32 ring_datasize; /* < ring_size */
u32 ring_data_startoffset;
};
struct hv_ring_buffer_debug_info {
u32 current_interrupt_mask;
u32 current_read_index;
u32 current_write_index;
u32 bytes_avail_toread;
u32 bytes_avail_towrite;
};
/*
*
* hv_get_ringbuffer_availbytes()
*
* Get number of bytes available to read and to write to
* for the specified ring buffer
*/
static inline void
hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
u32 *read, u32 *write)
{
u32 read_loc, write_loc, dsize;
smp_read_barrier_depends();
/* Capture the read/write indices before they changed */
read_loc = rbi->ring_buffer->read_index;
write_loc = rbi->ring_buffer->write_index;
dsize = rbi->ring_datasize;
*write = write_loc >= read_loc ? dsize - (write_loc - read_loc) :
read_loc - write_loc;
*read = dsize - *write;
}
/*
* We use the same version numbering for all Hyper-V modules.
*
* Definition of versioning is as follows;
*
* Major Number Changes for these scenarios;
* 1. When a new version of Windows Hyper-V
* is released.
* 2. A Major change has occurred in the
* Linux IC's.
* (For example the merge for the first time
* into the kernel) Every time the Major Number
* changes, the Revision number is reset to 0.
* Minor Number Changes when new functionality is added
* to the Linux IC's that is not a bug fix.
*
* 3.1 - Added completed hv_utils driver. Shutdown/Heartbeat/Timesync
*/
#define HV_DRV_VERSION "3.1"
/*
* A revision number of vmbus that is used for ensuring both ends on a
* partition are using compatible versions.
*/
#define VMBUS_REVISION_NUMBER 13
/* Make maximum size of pipe payload of 16K */
#define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)
/* Define PipeMode values. */
#define VMBUS_PIPE_TYPE_BYTE 0x00000000
#define VMBUS_PIPE_TYPE_MESSAGE 0x00000004
/* The size of the user defined data buffer for non-pipe offers. */
#define MAX_USER_DEFINED_BYTES 120
/* The size of the user defined data buffer for pipe offers. */
#define MAX_PIPE_USER_DEFINED_BYTES 116
/*
* At the center of the Channel Management library is the Channel Offer. This
* struct contains the fundamental information about an offer.
*/
struct vmbus_channel_offer {
uuid_le if_type;
uuid_le if_instance;
u64 int_latency; /* in 100ns units */
u32 if_revision;
u32 server_ctx_size; /* in bytes */
u16 chn_flags;
u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
union {
/* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
struct {
unsigned char user_def[MAX_USER_DEFINED_BYTES];
} std;
/*
* Pipes:
* The following sructure is an integrated pipe protocol, which
* is implemented on top of standard user-defined data. Pipe
* clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
* use.
*/
struct {
u32 pipe_mode;
unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
} pipe;
} u;
u32 padding;
} __packed;
/* Server Flags */
#define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1
#define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2
#define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
#define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10
#define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100
#define VMBUS_CHANNEL_PARENT_OFFER 0x200
#define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400
struct vmpacket_descriptor {
u16 type;
u16 offset8;
u16 len8;
u16 flags;
u64 trans_id;
} __packed;
struct vmpacket_header {
u32 prev_pkt_start_offset;
struct vmpacket_descriptor descriptor;
} __packed;
struct vmtransfer_page_range {
u32 byte_count;
u32 byte_offset;
} __packed;
struct vmtransfer_page_packet_header {
struct vmpacket_descriptor d;
u16 xfer_pageset_id;
u8 sender_owns_set;
u8 reserved;
u32 range_cnt;
struct vmtransfer_page_range ranges[1];
} __packed;
struct vmgpadl_packet_header {
struct vmpacket_descriptor d;
u32 gpadl;
u32 reserved;
} __packed;
struct vmadd_remove_transfer_page_set {
struct vmpacket_descriptor d;
u32 gpadl;
u16 xfer_pageset_id;
u16 reserved;
} __packed;
/*
* This structure defines a range in guest physical space that can be made to
* look virtually contiguous.
*/
struct gpa_range {
u32 byte_count;
u32 byte_offset;
u64 pfn_array[0];
};
/*
* This is the format for an Establish Gpadl packet, which contains a handle by
* which this GPADL will be known and a set of GPA ranges associated with it.
* This can be converted to a MDL by the guest OS. If there are multiple GPA
* ranges, then the resulting MDL will be "chained," representing multiple VA
* ranges.
*/
struct vmestablish_gpadl {
struct vmpacket_descriptor d;
u32 gpadl;
u32 range_cnt;
struct gpa_range range[1];
} __packed;
/*
* This is the format for a Teardown Gpadl packet, which indicates that the
* GPADL handle in the Establish Gpadl packet will never be referenced again.
*/
struct vmteardown_gpadl {
struct vmpacket_descriptor d;
u32 gpadl;
u32 reserved; /* for alignment to a 8-byte boundary */
} __packed;
/*
* This is the format for a GPA-Direct packet, which contains a set of GPA
* ranges, in addition to commands and/or data.
*/
struct vmdata_gpa_direct {
struct vmpacket_descriptor d;
u32 reserved;
u32 range_cnt;
struct gpa_range range[1];
} __packed;
/* This is the format for a Additional Data Packet. */
struct vmadditional_data {
struct vmpacket_descriptor d;
u64 total_bytes;
u32 offset;
u32 byte_cnt;
unsigned char data[1];
} __packed;
union vmpacket_largest_possible_header {
struct vmpacket_descriptor simple_hdr;
struct vmtransfer_page_packet_header xfer_page_hdr;
struct vmgpadl_packet_header gpadl_hdr;
struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
struct vmestablish_gpadl establish_gpadl_hdr;
struct vmteardown_gpadl teardown_gpadl_hdr;
struct vmdata_gpa_direct data_gpa_direct_hdr;
};
#define VMPACKET_DATA_START_ADDRESS(__packet) \
(void *)(((unsigned char *)__packet) + \
((struct vmpacket_descriptor)__packet)->offset8 * 8)
#define VMPACKET_DATA_LENGTH(__packet) \
((((struct vmpacket_descriptor)__packet)->len8 - \
((struct vmpacket_descriptor)__packet)->offset8) * 8)
#define VMPACKET_TRANSFER_MODE(__packet) \
(((struct IMPACT)__packet)->type)
enum vmbus_packet_type {
VM_PKT_INVALID = 0x0,
VM_PKT_SYNCH = 0x1,
VM_PKT_ADD_XFER_PAGESET = 0x2,
VM_PKT_RM_XFER_PAGESET = 0x3,
VM_PKT_ESTABLISH_GPADL = 0x4,
VM_PKT_TEARDOWN_GPADL = 0x5,
VM_PKT_DATA_INBAND = 0x6,
VM_PKT_DATA_USING_XFER_PAGES = 0x7,
VM_PKT_DATA_USING_GPADL = 0x8,
VM_PKT_DATA_USING_GPA_DIRECT = 0x9,
VM_PKT_CANCEL_REQUEST = 0xa,
VM_PKT_COMP = 0xb,
VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc,
VM_PKT_ADDITIONAL_DATA = 0xd
};
#define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1
/* Version 1 messages */
enum vmbus_channel_message_type {
CHANNELMSG_INVALID = 0,
CHANNELMSG_OFFERCHANNEL = 1,
CHANNELMSG_RESCIND_CHANNELOFFER = 2,
CHANNELMSG_REQUESTOFFERS = 3,
CHANNELMSG_ALLOFFERS_DELIVERED = 4,
CHANNELMSG_OPENCHANNEL = 5,
CHANNELMSG_OPENCHANNEL_RESULT = 6,
CHANNELMSG_CLOSECHANNEL = 7,
CHANNELMSG_GPADL_HEADER = 8,
CHANNELMSG_GPADL_BODY = 9,
CHANNELMSG_GPADL_CREATED = 10,
CHANNELMSG_GPADL_TEARDOWN = 11,
CHANNELMSG_GPADL_TORNDOWN = 12,
CHANNELMSG_RELID_RELEASED = 13,
CHANNELMSG_INITIATE_CONTACT = 14,
CHANNELMSG_VERSION_RESPONSE = 15,
CHANNELMSG_UNLOAD = 16,
#ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
CHANNELMSG_VIEWRANGE_ADD = 17,
CHANNELMSG_VIEWRANGE_REMOVE = 18,
#endif
CHANNELMSG_COUNT
};
struct vmbus_channel_message_header {
enum vmbus_channel_message_type msgtype;
u32 padding;
} __packed;
/* Query VMBus Version parameters */
struct vmbus_channel_query_vmbus_version {
struct vmbus_channel_message_header header;
u32 version;
} __packed;
/* VMBus Version Supported parameters */
struct vmbus_channel_version_supported {
struct vmbus_channel_message_header header;
u8 version_supported;
} __packed;
/* Offer Channel parameters */
struct vmbus_channel_offer_channel {
struct vmbus_channel_message_header header;
struct vmbus_channel_offer offer;
u32 child_relid;
u8 monitorid;
u8 monitor_allocated;
} __packed;
/* Rescind Offer parameters */
struct vmbus_channel_rescind_offer {
struct vmbus_channel_message_header header;
u32 child_relid;
} __packed;
/*
* Request Offer -- no parameters, SynIC message contains the partition ID
* Set Snoop -- no parameters, SynIC message contains the partition ID
* Clear Snoop -- no parameters, SynIC message contains the partition ID
* All Offers Delivered -- no parameters, SynIC message contains the partition
* ID
* Flush Client -- no parameters, SynIC message contains the partition ID
*/
/* Open Channel parameters */
struct vmbus_channel_open_channel {
struct vmbus_channel_message_header header;
/* Identifies the specific VMBus channel that is being opened. */
u32 child_relid;
/* ID making a particular open request at a channel offer unique. */
u32 openid;
/* GPADL for the channel's ring buffer. */
u32 ringbuffer_gpadlhandle;
/* GPADL for the channel's server context save area. */
u32 server_contextarea_gpadlhandle;
/*
* The upstream ring buffer begins at offset zero in the memory
* described by RingBufferGpadlHandle. The downstream ring buffer
* follows it at this offset (in pages).
*/
u32 downstream_ringbuffer_pageoffset;
/* User-specific data to be passed along to the server endpoint. */
unsigned char userdata[MAX_USER_DEFINED_BYTES];
} __packed;
/* Open Channel Result parameters */
struct vmbus_channel_open_result {
struct vmbus_channel_message_header header;
u32 child_relid;
u32 openid;
u32 status;
} __packed;
/* Close channel parameters; */
struct vmbus_channel_close_channel {
struct vmbus_channel_message_header header;
u32 child_relid;
} __packed;
/* Channel Message GPADL */
#define GPADL_TYPE_RING_BUFFER 1
#define GPADL_TYPE_SERVER_SAVE_AREA 2
#define GPADL_TYPE_TRANSACTION 8
/*
* The number of PFNs in a GPADL message is defined by the number of
* pages that would be spanned by ByteCount and ByteOffset. If the
* implied number of PFNs won't fit in this packet, there will be a
* follow-up packet that contains more.
*/
struct vmbus_channel_gpadl_header {
struct vmbus_channel_message_header header;
u32 child_relid;
u32 gpadl;
u16 range_buflen;
u16 rangecount;
struct gpa_range range[0];
} __packed;
/* This is the followup packet that contains more PFNs. */
struct vmbus_channel_gpadl_body {
struct vmbus_channel_message_header header;
u32 msgnumber;
u32 gpadl;
u64 pfn[0];
} __packed;
struct vmbus_channel_gpadl_created {
struct vmbus_channel_message_header header;
u32 child_relid;
u32 gpadl;
u32 creation_status;
} __packed;
struct vmbus_channel_gpadl_teardown {
struct vmbus_channel_message_header header;
u32 child_relid;
u32 gpadl;
} __packed;
struct vmbus_channel_gpadl_torndown {
struct vmbus_channel_message_header header;
u32 gpadl;
} __packed;
#ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
struct vmbus_channel_view_range_add {
struct vmbus_channel_message_header header;
PHYSICAL_ADDRESS viewrange_base;
u64 viewrange_length;
u32 child_relid;
} __packed;
struct vmbus_channel_view_range_remove {
struct vmbus_channel_message_header header;
PHYSICAL_ADDRESS viewrange_base;
u32 child_relid;
} __packed;
#endif
struct vmbus_channel_relid_released {
struct vmbus_channel_message_header header;
u32 child_relid;
} __packed;
struct vmbus_channel_initiate_contact {
struct vmbus_channel_message_header header;
u32 vmbus_version_requested;
u32 padding2;
u64 interrupt_page;
u64 monitor_page1;
u64 monitor_page2;
} __packed;
struct vmbus_channel_version_response {
struct vmbus_channel_message_header header;
u8 version_supported;
} __packed;
enum vmbus_channel_state {
CHANNEL_OFFER_STATE,
CHANNEL_OPENING_STATE,
CHANNEL_OPEN_STATE,
};
struct vmbus_channel_debug_info {
u32 relid;
enum vmbus_channel_state state;
uuid_le interfacetype;
uuid_le interface_instance;
u32 monitorid;
u32 servermonitor_pending;
u32 servermonitor_latency;
u32 servermonitor_connectionid;
u32 clientmonitor_pending;
u32 clientmonitor_latency;
u32 clientmonitor_connectionid;
struct hv_ring_buffer_debug_info inbound;
struct hv_ring_buffer_debug_info outbound;
};
/*
* Represents each channel msg on the vmbus connection This is a
* variable-size data structure depending on the msg type itself
*/
struct vmbus_channel_msginfo {
/* Bookkeeping stuff */
struct list_head msglistentry;
/* So far, this is only used to handle gpadl body message */
struct list_head submsglist;
/* Synchronize the request/response if needed */
struct completion waitevent;
union {
struct vmbus_channel_version_supported version_supported;
struct vmbus_channel_open_result open_result;
struct vmbus_channel_gpadl_torndown gpadl_torndown;
struct vmbus_channel_gpadl_created gpadl_created;
struct vmbus_channel_version_response version_response;
} response;
u32 msgsize;
/*
* The channel message that goes out on the "wire".
* It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
*/
unsigned char msg[0];
};
struct vmbus_close_msg {
struct vmbus_channel_msginfo info;
struct vmbus_channel_close_channel msg;
};
struct vmbus_channel {
struct list_head listentry;
struct hv_device *device_obj;
struct work_struct work;
enum vmbus_channel_state state;
struct vmbus_channel_offer_channel offermsg;
/*
* These are based on the OfferMsg.MonitorId.
* Save it here for easy access.
*/
u8 monitor_grp;
u8 monitor_bit;
u32 ringbuffer_gpadlhandle;
/* Allocated memory for ring buffer */
void *ringbuffer_pages;
u32 ringbuffer_pagecount;
struct hv_ring_buffer_info outbound; /* send to parent */
struct hv_ring_buffer_info inbound; /* receive from parent */
spinlock_t inbound_lock;
struct workqueue_struct *controlwq;
struct vmbus_close_msg close_msg;
/* Channel callback are invoked in this workqueue context */
/* HANDLE dataWorkQueue; */
void (*onchannel_callback)(void *context);
void *channel_callback_context;
};
void vmbus_onmessage(void *context);
int vmbus_request_offers(void);
/* The format must be the same as struct vmdata_gpa_direct */
struct vmbus_channel_packet_page_buffer {
u16 type;
u16 dataoffset8;
u16 length8;
u16 flags;
u64 transactionid;
u32 reserved;
u32 rangecount;
struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
} __packed;
/* The format must be the same as struct vmdata_gpa_direct */
struct vmbus_channel_packet_multipage_buffer {
u16 type;
u16 dataoffset8;
u16 length8;
u16 flags;
u64 transactionid;
u32 reserved;
u32 rangecount; /* Always 1 in this case */
struct hv_multipage_buffer range;
} __packed;
extern int vmbus_open(struct vmbus_channel *channel,
u32 send_ringbuffersize,
u32 recv_ringbuffersize,
void *userdata,
u32 userdatalen,
void(*onchannel_callback)(void *context),
void *context);
extern void vmbus_close(struct vmbus_channel *channel);
extern int vmbus_sendpacket(struct vmbus_channel *channel,
const void *buffer,
u32 bufferLen,
u64 requestid,
enum vmbus_packet_type type,
u32 flags);
extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
struct hv_page_buffer pagebuffers[],
u32 pagecount,
void *buffer,
u32 bufferlen,
u64 requestid);
extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
struct hv_multipage_buffer *mpb,
void *buffer,
u32 bufferlen,
u64 requestid);
extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
void *kbuffer,
u32 size,
u32 *gpadl_handle);
extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
u32 gpadl_handle);
extern int vmbus_recvpacket(struct vmbus_channel *channel,
void *buffer,
u32 bufferlen,
u32 *buffer_actual_len,
u64 *requestid);
extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
void *buffer,
u32 bufferlen,
u32 *buffer_actual_len,
u64 *requestid);
extern void vmbus_get_debug_info(struct vmbus_channel *channel,
struct vmbus_channel_debug_info *debug);
extern void vmbus_ontimer(unsigned long data);
struct hv_dev_port_info {
u32 int_mask;
u32 read_idx;
u32 write_idx;
u32 bytes_avail_toread;
u32 bytes_avail_towrite;
};
/* Base driver object */
struct hv_driver {
const char *name;
/* the device type supported by this driver */
uuid_le dev_type;
const struct hv_vmbus_device_id *id_table;
struct device_driver driver;
int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
int (*remove)(struct hv_device *);
void (*shutdown)(struct hv_device *);
};
/* Base device object */
struct hv_device {
/* the device type id of this device */
uuid_le dev_type;
/* the device instance id of this device */
uuid_le dev_instance;
struct device device;
struct vmbus_channel *channel;
};
static inline struct hv_device *device_to_hv_device(struct device *d)
{
return container_of(d, struct hv_device, device);
}
static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
{
return container_of(d, struct hv_driver, driver);
}
static inline void hv_set_drvdata(struct hv_device *dev, void *data)
{
dev_set_drvdata(&dev->device, data);
}
static inline void *hv_get_drvdata(struct hv_device *dev)
{
return dev_get_drvdata(&dev->device);
}
/* Vmbus interface */
#define vmbus_driver_register(driver) \
__vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
int __must_check __vmbus_driver_register(struct hv_driver *hv_driver,
struct module *owner,
const char *mod_name);
void vmbus_driver_unregister(struct hv_driver *hv_driver);
/**
* VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device
*
* This macro is used to create a struct hv_vmbus_device_id that matches a
* specific device.
*/
#define VMBUS_DEVICE(g0, g1, g2, g3, g4, g5, g6, g7, \
g8, g9, ga, gb, gc, gd, ge, gf) \
.guid = { g0, g1, g2, g3, g4, g5, g6, g7, \
g8, g9, ga, gb, gc, gd, ge, gf },
/*
* Common header for Hyper-V ICs
*/
#define ICMSGTYPE_NEGOTIATE 0
#define ICMSGTYPE_HEARTBEAT 1
#define ICMSGTYPE_KVPEXCHANGE 2
#define ICMSGTYPE_SHUTDOWN 3
#define ICMSGTYPE_TIMESYNC 4
#define ICMSGTYPE_VSS 5
#define ICMSGHDRFLAG_TRANSACTION 1
#define ICMSGHDRFLAG_REQUEST 2
#define ICMSGHDRFLAG_RESPONSE 4
/*
* While we want to handle util services as regular devices,
* there is only one instance of each of these services; so
* we statically allocate the service specific state.
*/
struct hv_util_service {
u8 *recv_buffer;
void (*util_cb)(void *);
int (*util_init)(struct hv_util_service *);
void (*util_deinit)(void);
};
struct vmbuspipe_hdr {
u32 flags;
u32 msgsize;
} __packed;
struct ic_version {
u16 major;
u16 minor;
} __packed;
struct icmsg_hdr {
struct ic_version icverframe;
u16 icmsgtype;
struct ic_version icvermsg;
u16 icmsgsize;
u32 status;
u8 ictransaction_id;
u8 icflags;
u8 reserved[2];
} __packed;
struct icmsg_negotiate {
u16 icframe_vercnt;
u16 icmsg_vercnt;
u32 reserved;
struct ic_version icversion_data[1]; /* any size array */
} __packed;
struct shutdown_msg_data {
u32 reason_code;
u32 timeout_seconds;
u32 flags;
u8 display_message[2048];
} __packed;
struct heartbeat_msg_data {
u64 seq_num;
u32 reserved[8];
} __packed;
/* Time Sync IC defs */
#define ICTIMESYNCFLAG_PROBE 0
#define ICTIMESYNCFLAG_SYNC 1
#define ICTIMESYNCFLAG_SAMPLE 2
#ifdef __x86_64__
#define WLTIMEDELTA 116444736000000000L /* in 100ns unit */
#else
#define WLTIMEDELTA 116444736000000000LL
#endif
struct ictimesync_data {
u64 parenttime;
u64 childtime;
u64 roundtriptime;
u8 flags;
} __packed;
struct hyperv_service_callback {
u8 msg_type;
char *log_msg;
uuid_le data;
struct vmbus_channel *channel;
void (*callback) (void *context);
};
#define MAX_SRV_VER 0x7ffffff
extern void vmbus_prep_negotiate_resp(struct icmsg_hdr *,
struct icmsg_negotiate *, u8 *, int,
int);
int hv_kvp_init(struct hv_util_service *);
void hv_kvp_deinit(void);
void hv_kvp_onchannelcallback(void *);
#endif /* __KERNEL__ */
#endif /* _HYPERV_H */

194
hyper-v.spec
View File

@ -19,7 +19,13 @@
%define hv_kvp_daemon hv_kvp_daemon %define hv_kvp_daemon hv_kvp_daemon
%define hv_vss_daemon hv_vss_daemon %define hv_vss_daemon hv_vss_daemon
%define hv_fcopy_daemon hv_fcopy_daemon %define hv_fcopy_daemon hv_fcopy_daemon
%define helper_dir /usr/lib/%{name} %define vmbus_bufring vmbus_bufring
%define hv_fcopy_uio_daemon hv_fcopy_uio_daemon
%define include_uapi_linux_hyperv include_uapi_linux_hyperv
%define chardev_kvp vmbus/hv_kvp
%define chardev_vss vmbus/hv_vss
%define chardev_fcopy vmbus/hv_fcopy
%define helper_dir /usr/lib/%name
Name: hyper-v Name: hyper-v
ExclusiveArch: %ix86 x86_64 aarch64 ExclusiveArch: %ix86 x86_64 aarch64
@ -30,19 +36,21 @@ BuildRequires: pkgconfig(systemd)
Conflicts: kernel < 4.2 Conflicts: kernel < 4.2
Summary: Microsoft Hyper-V tools Summary: Microsoft Hyper-V tools
License: GPL-2.0-only License: GPL-2.0-only
Group: System/Kernel
Supplements: modalias(dmi:*svnMicrosoftCorporation*pnVirtualMachine*rnVirtualMachine*) Supplements: modalias(dmi:*svnMicrosoftCorporation*pnVirtualMachine*rnVirtualMachine*)
Supplements: modalias(pci:v00001414d00005353sv*sd*bc*sc*i*) Supplements: modalias(pci:v00001414d00005353sv*sd*bc*sc*i*)
URL: http://www.kernel.org URL: http://www.kernel.org
# Arbitrary version number # Arbitrary version number
Version: 8 Version: 9
Release: 0 Release: 0
Source0: hyper-v.lsvmbus.py Source0: hyper-v.lsvmbus.py
Source5: hyper-v.kvptest.ps1.txt Source5: hyper-v.kvptest.ps1.txt
Source7: hyper-v.compare-with-upstream.sh Source7: hyper-v.compare-with-upstream.sh
Source8: hyper-v.tools.hv.vmbus_bufring.h
Source9: hyper-v.include.linux.hyperv.h Source9: hyper-v.include.linux.hyperv.h
Source10: hyper-v.tools.hv.hv_kvp_daemon.c Source10: hyper-v.tools.hv.hv_kvp_daemon.c
Source11: hyper-v.tools.hv.vmbus_bufring.c
Source12: hyper-v.tools.hv.hv_vss_daemon.c Source12: hyper-v.tools.hv.hv_vss_daemon.c
Source13: hyper-v.tools.hv.hv_fcopy_uio_daemon.c
Source14: hyper-v.tools.hv.hv_fcopy_daemon.c Source14: hyper-v.tools.hv.hv_fcopy_daemon.c
Source20: hyper-v.tools.hv.hv_get_dhcp_info.sh Source20: hyper-v.tools.hv.hv_get_dhcp_info.sh
Source21: hyper-v.tools.hv.hv_get_dns_info.sh Source21: hyper-v.tools.hv.hv_get_dns_info.sh
@ -56,107 +64,147 @@ This package contains the Microsoft Hyper-V tools.
%prep %prep
%setup -Tc %setup -Tc
cp -avL %{S:5} kvptest.ps1.txt cp -avL %{S:5} kvptest.ps1.txt
cp -vL %{S:9} %{hv_kvp_daemon}.h cp -vL %{S:8} %vmbus_bufring.h
cp -vL %{S:9} %include_uapi_linux_hyperv.h
cp -vL %{S:10} . cp -vL %{S:10} .
cp -vL %{S:12} %{hv_vss_daemon}.c cp -vL %{S:11} %vmbus_bufring.c
cp -vL %{S:14} %{hv_fcopy_daemon}.c cp -vL %{S:12} %hv_vss_daemon.c
cp -vL %{S:13} %hv_fcopy_uio_daemon.c
cp -vL %{S:14} %hv_fcopy_daemon.c
%patch -P 0 -p1 %patch -P 0 -p1
mv `basename %{S:10}` %{hv_kvp_daemon}.c mv `basename %{S:10}` %hv_kvp_daemon.c
%build %build
sed -i~ '/#include <linux.hyperv.h>/d' %{hv_kvp_daemon}.c sed -i~ '/#include <linux.hyperv.h>/d' %hv_kvp_daemon.c
sed -i~ '/#include <linux.hyperv.h>/d' %{hv_vss_daemon}.c sed -i~ '/#include <linux.hyperv.h>/d' %hv_vss_daemon.c
sed -i~ '/#include <linux.hyperv.h>/d' %{hv_fcopy_daemon}.c sed -i~ '/#include <linux.hyperv.h>/d' %hv_fcopy_uio_daemon.c
sed -i~ '/#include <linux.hyperv.h>/d' %hv_fcopy_daemon.c
gcc \ gcc \
$RPM_OPT_FLAGS \ $RPM_OPT_FLAGS \
-Wno-unused-variable \ -Wno-unused-variable \
-Wno-pointer-sign \ -Wno-pointer-sign \
-D_GNU_SOURCE \ -D_GNU_SOURCE \
-g \ -g \
%{hv_kvp_daemon}.c \ %hv_kvp_daemon.c \
-include %{hv_kvp_daemon}.h \ -include %include_uapi_linux_hyperv.h \
-DCN_KVP_IDX=0x9 \ -DCN_KVP_IDX=0x9 \
-DCN_KVP_VAL=0x1 \ -DCN_KVP_VAL=0x1 \
-DKVP_SCRIPTS_PATH= \ -DKVP_SCRIPTS_PATH= \
-pthread \ -pthread \
-o %{hv_kvp_daemon} -o %hv_kvp_daemon
gcc \ gcc \
$RPM_OPT_FLAGS \ $RPM_OPT_FLAGS \
-Wno-unused-variable \ -Wno-unused-variable \
-Wno-pointer-sign \ -Wno-pointer-sign \
-D_GNU_SOURCE \ -D_GNU_SOURCE \
-g \ -g \
%{hv_vss_daemon}.c \ %hv_vss_daemon.c \
-include %{hv_kvp_daemon}.h \ -include %include_uapi_linux_hyperv.h \
-DCN_VSS_IDX=0xa \ -DCN_VSS_IDX=0xa \
-DCN_VSS_VAL=0x1 \ -DCN_VSS_VAL=0x1 \
-o %{hv_vss_daemon} -o %hv_vss_daemon
gcc \ gcc \
$RPM_OPT_FLAGS \ $RPM_OPT_FLAGS \
-Wno-unused-variable \ -Wno-unused-variable \
-Wno-pointer-sign \ -Wno-pointer-sign \
-D_GNU_SOURCE \ -D_GNU_SOURCE \
-g \ -g \
%{hv_fcopy_daemon}.c \ %hv_fcopy_daemon.c \
-include %{hv_kvp_daemon}.h \ -include %include_uapi_linux_hyperv.h \
-o %{hv_fcopy_daemon} -o %hv_fcopy_daemon
%ifarch %ix86 x86_64
gcc \
$RPM_OPT_FLAGS \
-Wno-unused-variable \
-Wno-pointer-sign \
-Wno-address-of-packed-member \
-D_GNU_SOURCE \
-g \
%vmbus_bufring.c \
%hv_fcopy_uio_daemon.c \
-include %include_uapi_linux_hyperv.h \
-o %hv_fcopy_uio_daemon
%endif
%install %install
# It is not a callable app anyway, so move it out of the way # It is not a callable app anyway, so move it out of the way
bindir=%{helper_dir}/bin bindir=%helper_dir/bin
mkdir -p $RPM_BUILD_ROOT${bindir} mkdir -p %buildroot${bindir}
mkdir -p $RPM_BUILD_ROOT%{_sbindir} mkdir -p %buildroot%_sbindir
mkdir -p $RPM_BUILD_ROOT%{helper_dir}/bin install -m755 %hv_kvp_daemon %buildroot${bindir}
install -m755 %{hv_kvp_daemon} $RPM_BUILD_ROOT${bindir} install -m755 %hv_vss_daemon %buildroot${bindir}
install -m755 %{hv_vss_daemon} $RPM_BUILD_ROOT${bindir} install -m755 %hv_fcopy_daemon %buildroot${bindir}
install -m755 %{hv_fcopy_daemon} $RPM_BUILD_ROOT${bindir} %ifarch %ix86 x86_64
cp -avL %{S:0} $RPM_BUILD_ROOT%{_sbindir}/lsvmbus install -m755 %hv_fcopy_uio_daemon %buildroot${bindir}
chmod 0755 $RPM_BUILD_ROOT%{_sbindir}/lsvmbus %endif
cp -avL %{S:20} $RPM_BUILD_ROOT%{helper_dir}/bin/hv_get_dhcp_info cp -avL %{S:0} %buildroot%_sbindir/lsvmbus
cp -avL %{S:21} $RPM_BUILD_ROOT%{helper_dir}/bin/hv_get_dns_info chmod 0755 %buildroot%_sbindir/lsvmbus
cp -avL %{S:22} $RPM_BUILD_ROOT%{helper_dir}/bin/hv_set_ifconfig cp -avL %{S:20} %buildroot${bindir}/hv_get_dhcp_info
chmod 755 $RPM_BUILD_ROOT%{helper_dir}/bin/* cp -avL %{S:21} %buildroot${bindir}/hv_get_dns_info
d=$RPM_BUILD_ROOT%{_unitdir} cp -avL %{S:22} %buildroot${bindir}/hv_set_ifconfig
chmod 755 %buildroot${bindir}/*
d=%buildroot%_unitdir
mkdir -vp ${d} mkdir -vp ${d}
# #
tee ${d}/%{hv_kvp_daemon}.service <<EOF tee ${d}/%hv_kvp_daemon.service <<EOF
# started via %{_udevrulesdir}/%{hv_kvp_daemon}.rules # started via %_udevrulesdir/%name.rules
[Unit] [Unit]
Description=Hyper-V KVP Daemon Description=Hyper-V KVP Daemon
After=local-fs.target After=local-fs.target
ConditionVirtualization=microsoft ConditionVirtualization=microsoft
ConditionPathExists=/dev/%chardev_kvp
[Service] [Service]
Environment="PATH=%{helper_dir}/bin:/usr/sbin:/usr/bin:/sbin:/bin" Environment="PATH=${bindir}:/usr/sbin:/usr/bin:/sbin:/bin"
ExecStart=${bindir}/%{hv_kvp_daemon} --no-daemon ExecStart=${bindir}/%hv_kvp_daemon --no-daemon
Restart=on-failure Restart=on-failure
[Install] [Install]
WantedBy=default.target WantedBy=default.target
EOF EOF
# #
tee ${d}/%{hv_vss_daemon}.service <<EOF tee ${d}/%hv_vss_daemon.service <<EOF
# started via %{_udevrulesdir}/%{hv_vss_daemon}.rules # started via %_udevrulesdir/%name.rules
[Unit] [Unit]
Description=Hyper-V VSS Daemon Description=Hyper-V VSS Daemon
ConditionVirtualization=microsoft ConditionVirtualization=microsoft
ConditionPathExists=/dev/%chardev_vss
[Service] [Service]
ExecStart=${bindir}/%{hv_vss_daemon} --no-daemon ExecStart=${bindir}/%hv_vss_daemon --no-daemon
Restart=on-failure Restart=on-failure
[Install] [Install]
WantedBy=default.target WantedBy=default.target
EOF EOF
# #
tee ${d}/%{hv_fcopy_daemon}.service <<EOF tee ${d}/%hv_fcopy_daemon.service <<EOF
# started via %{_udevrulesdir}/%{hv_fcopy_daemon}.rules # started via %_udevrulesdir/%name.rules
[Unit] [Unit]
Description=Hyper-V host to guest file copy daemon Description=Hyper-V host to guest file copy daemon
ConditionVirtualization=microsoft ConditionVirtualization=microsoft
ConditionPathExists=/dev/%chardev_fcopy
[Service] [Service]
ExecStart=${bindir}/%{hv_fcopy_daemon} --no-daemon ExecStart=${bindir}/%hv_fcopy_daemon --no-daemon
Restart=on-failure
[Install]
WantedBy=default.target
EOF
#
tee ${d}/%hv_fcopy_uio_daemon.service <<EOF
# started via %_udevrulesdir/%name.rules
[Unit]
Description=Hyper-V host to guest UIO file copy daemon
ConditionVirtualization=microsoft
ConditionPathExists=/sys/bus/vmbus/drivers/uio_hv_generic/new_id
ConditionPathExists=!/dev/%chardev_fcopy
[Service]
ExecStartPre=/bin/sh -c 'set -e;echo 34d14be3-dee4-41c8-9ae7-6b174977c192 > /sys/bus/vmbus/drivers/uio_hv_generic/new_id'
ExecStart=${bindir}/%hv_fcopy_uio_daemon --no-daemon
Restart=on-failure Restart=on-failure
[Install] [Install]
@ -165,53 +213,61 @@ EOF
# #
# #
# #
d=$RPM_BUILD_ROOT%{_udevrulesdir} d=%buildroot%_udevrulesdir
mkdir -vp ${d} mkdir -vp ${d}
tee ${d}/%{hv_kvp_daemon}.rules <<EOF tee ${d}/%name.rules <<EOF
ACTION=="add", KERNEL=="vmbus/hv_kvp", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%{hv_kvp_daemon}.service" ACTION=="add", KERNEL=="%chardev_kvp", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%hv_kvp_daemon.service"
EOF ACTION=="add", KERNEL=="%chardev_vss", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%hv_vss_daemon.service"
tee ${d}/%{hv_vss_daemon}.rules <<EOF ACTION=="add", KERNEL=="%chardev_fcopy", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%hv_fcopy_daemon.service"
ACTION=="add", KERNEL=="vmbus/hv_vss", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%{hv_vss_daemon}.service" ACTION=="add", SUBSYSTEM=="vmbus", ATTRS{class_id}=="{34d14be3-dee4-41c8-9ae7-6b174977c192}", RUN{builtin}+="kmod load uio_hv_generic", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%hv_fcopy_uio_daemon.service"
EOF
tee ${d}/%{hv_fcopy_daemon}.rules <<EOF
ACTION=="add", KERNEL=="vmbus/hv_fcopy", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%{hv_fcopy_daemon}.service"
EOF EOF
# #
# #
helper=inst_sys.sh helper=inst_sys.sh
tee $RPM_BUILD_ROOT${bindir}/${helper} <<EOF tee %buildroot${bindir}/${helper} <<'_EOF_'
#!/bin/bash #!/bin/bash
# Starting daemons via RUN== in udev rules is not supported. # Starting daemons via RUN== in udev rules is not supported.
# In inst-sys systemd is not used, so start all daemons manually. # In inst-sys systemd is not used, so start all daemons manually.
bindir=%helper_dir/bin
declare -a helpers
test -c /dev/%chardev_kvp && helpers+=(%hv_kvp_daemon)
test -c /dev/%chardev_vss && helpers+=(%hv_vss_daemon)
if test -c /dev/%chardev_fcopy
then
helpers+=(%hv_fcopy_daemon)
else
modprobe -v uio_hv_generic
if test -f /sys/bus/vmbus/drivers/uio_hv_generic/new_id
then
echo '34d14be3-dee4-41c8-9ae7-6b174977c192' > /sys/bus/vmbus/drivers/uio_hv_generic/new_id
helpers+=(%hv_fcopy_uio_daemon)
fi
fi
if test -d /sys/bus/vmbus/devices if test -d /sys/bus/vmbus/devices
then then
export PATH=${bindir}:\$PATH export PATH=${bindir}:$PATH
echo -n "Starting hyper-v helpers:" echo -n "Starting hyper-v helpers:"
for i in \ for i in "${helpers[@]}"
%{hv_kvp_daemon} \
%{hv_vss_daemon} \
%{hv_fcopy_daemon}
do do
if mkdir /run/\$i if mkdir /run/$i
then then
echo -n " \$i" echo -n " $i"
\$i < /dev/null & $i < /dev/null &
fi fi
done done
echo " ... done" echo " ... done"
fi fi
EOF _EOF_
chmod 755 $RPM_BUILD_ROOT${bindir}/${helper} chmod 755 %buildroot${bindir}/${helper}
# #
%python3_fix_shebang %?python3_fix_shebang
%files %files
%doc kvptest.ps1.txt %doc kvptest.ps1.txt
%{_unitdir} %_unitdir/*
%dir /usr/lib/udev %_udevrulesdir/*
%{_udevrulesdir} %_sbindir/*
%{_sbindir}/* %helper_dir
%{helper_dir}
%pre %pre
# hv_kvp_daemon in SLES11 SP2 stored temporary state files in /var/opt # hv_kvp_daemon in SLES11 SP2 stored temporary state files in /var/opt

497
hyper-v.tools.hv.hv_fcopy_uio_daemon.c Normal file
View File

@ -0,0 +1,497 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* An implementation of host to guest copy functionality for Linux.
*
* Copyright (C) 2023, Microsoft, Inc.
*
* Author : K. Y. Srinivasan <kys@microsoft.com>
* Author : Saurabh Sengar <ssengar@microsoft.com>
*
*/
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <locale.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <wchar.h>
#include <sys/stat.h>
#include <linux/hyperv.h>
#include <linux/limits.h>
#include "vmbus_bufring.h"
#define ICMSGTYPE_NEGOTIATE 0
#define ICMSGTYPE_FCOPY 7
#define WIN8_SRV_MAJOR 1
#define WIN8_SRV_MINOR 1
#define WIN8_SRV_VERSION (WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR)
#define MAX_FOLDER_NAME 15
#define MAX_PATH_LEN 15
#define FCOPY_UIO "/sys/bus/vmbus/devices/eb765408-105f-49b6-b4aa-c123b64d17d4/uio"
#define FCOPY_VER_COUNT 1
static const int fcopy_versions[] = {
WIN8_SRV_VERSION
};
#define FW_VER_COUNT 1
static const int fw_versions[] = {
UTIL_FW_VERSION
};
#define HV_RING_SIZE 0x4000 /* 16KB ring buffer size */
unsigned char desc[HV_RING_SIZE];
static int target_fd;
static char target_fname[PATH_MAX];
static unsigned long long filesize;
static int hv_fcopy_create_file(char *file_name, char *path_name, __u32 flags)
{
int error = HV_E_FAIL;
char *q, *p;
filesize = 0;
p = path_name;
snprintf(target_fname, sizeof(target_fname), "%s/%s",
path_name, file_name);
/*
* Check to see if the path is already in place; if not,
* create if required.
*/
while ((q = strchr(p, '/')) != NULL) {
if (q == p) {
p++;
continue;
}
*q = '\0';
if (access(path_name, F_OK)) {
if (flags & CREATE_PATH) {
if (mkdir(path_name, 0755)) {
syslog(LOG_ERR, "Failed to create %s",
path_name);
goto done;
}
} else {
syslog(LOG_ERR, "Invalid path: %s", path_name);
goto done;
}
}
p = q + 1;
*q = '/';
}
if (!access(target_fname, F_OK)) {
syslog(LOG_INFO, "File: %s exists", target_fname);
if (!(flags & OVER_WRITE)) {
error = HV_ERROR_ALREADY_EXISTS;
goto done;
}
}
target_fd = open(target_fname,
O_RDWR | O_CREAT | O_TRUNC | O_CLOEXEC, 0744);
if (target_fd == -1) {
syslog(LOG_INFO, "Open Failed: %s", strerror(errno));
goto done;
}
error = 0;
done:
if (error)
target_fname[0] = '\0';
return error;
}
/* copy the data into the file */
static int hv_copy_data(struct hv_do_fcopy *cpmsg)
{
ssize_t len;
int ret = 0;
len = pwrite(target_fd, cpmsg->data, cpmsg->size, cpmsg->offset);
filesize += cpmsg->size;
if (len != cpmsg->size) {
switch (errno) {
case ENOSPC:
ret = HV_ERROR_DISK_FULL;
break;
default:
ret = HV_E_FAIL;
break;
}
syslog(LOG_ERR, "pwrite failed to write %llu bytes: %ld (%s)",
filesize, (long)len, strerror(errno));
}
return ret;
}
static int hv_copy_finished(void)
{
close(target_fd);
target_fname[0] = '\0';
return 0;
}
static void print_usage(char *argv[])
{
fprintf(stderr, "Usage: %s [options]\n"
"Options are:\n"
" -n, --no-daemon stay in foreground, don't daemonize\n"
" -h, --help print this help\n", argv[0]);
}
static bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, unsigned char *buf,
unsigned int buflen, const int *fw_version, int fw_vercnt,
const int *srv_version, int srv_vercnt,
int *nego_fw_version, int *nego_srv_version)
{
int icframe_major, icframe_minor;
int icmsg_major, icmsg_minor;
int fw_major, fw_minor;
int srv_major, srv_minor;
int i, j;
bool found_match = false;
struct icmsg_negotiate *negop;
/* Check that there's enough space for icframe_vercnt, icmsg_vercnt */
if (buflen < ICMSG_HDR + offsetof(struct icmsg_negotiate, reserved)) {
syslog(LOG_ERR, "Invalid icmsg negotiate");
return false;
}
icmsghdrp->icmsgsize = 0x10;
negop = (struct icmsg_negotiate *)&buf[ICMSG_HDR];
icframe_major = negop->icframe_vercnt;
icframe_minor = 0;
icmsg_major = negop->icmsg_vercnt;
icmsg_minor = 0;
/* Validate negop packet */
if (icframe_major > IC_VERSION_NEGOTIATION_MAX_VER_COUNT ||
icmsg_major > IC_VERSION_NEGOTIATION_MAX_VER_COUNT ||
ICMSG_NEGOTIATE_PKT_SIZE(icframe_major, icmsg_major) > buflen) {
syslog(LOG_ERR, "Invalid icmsg negotiate - icframe_major: %u, icmsg_major: %u\n",
icframe_major, icmsg_major);
goto fw_error;
}
/*
* Select the framework version number we will
* support.
*/
for (i = 0; i < fw_vercnt; i++) {
fw_major = (fw_version[i] >> 16);
fw_minor = (fw_version[i] & 0xFFFF);
for (j = 0; j < negop->icframe_vercnt; j++) {
if (negop->icversion_data[j].major == fw_major &&
negop->icversion_data[j].minor == fw_minor) {
icframe_major = negop->icversion_data[j].major;
icframe_minor = negop->icversion_data[j].minor;
found_match = true;
break;
}
}
if (found_match)
break;
}
if (!found_match)
goto fw_error;
found_match = false;
for (i = 0; i < srv_vercnt; i++) {
srv_major = (srv_version[i] >> 16);
srv_minor = (srv_version[i] & 0xFFFF);
for (j = negop->icframe_vercnt;
(j < negop->icframe_vercnt + negop->icmsg_vercnt);
j++) {
if (negop->icversion_data[j].major == srv_major &&
negop->icversion_data[j].minor == srv_minor) {
icmsg_major = negop->icversion_data[j].major;
icmsg_minor = negop->icversion_data[j].minor;
found_match = true;
break;
}
}
if (found_match)
break;
}
/*
* Respond with the framework and service
* version numbers we can support.
*/
fw_error:
if (!found_match) {
negop->icframe_vercnt = 0;
negop->icmsg_vercnt = 0;
} else {
negop->icframe_vercnt = 1;
negop->icmsg_vercnt = 1;
}
if (nego_fw_version)
*nego_fw_version = (icframe_major << 16) | icframe_minor;
if (nego_srv_version)
*nego_srv_version = (icmsg_major << 16) | icmsg_minor;
negop->icversion_data[0].major = icframe_major;
negop->icversion_data[0].minor = icframe_minor;
negop->icversion_data[1].major = icmsg_major;
negop->icversion_data[1].minor = icmsg_minor;
return found_match;
}
static void wcstoutf8(char *dest, const __u16 *src, size_t dest_size)
{
size_t len = 0;
while (len < dest_size) {
if (src[len] < 0x80)
dest[len++] = (char)(*src++);
else
dest[len++] = 'X';
}
dest[len] = '\0';
}
static int hv_fcopy_start(struct hv_start_fcopy *smsg_in)
{
setlocale(LC_ALL, "en_US.utf8");
size_t file_size, path_size;
char *file_name, *path_name;
char *in_file_name = (char *)smsg_in->file_name;
char *in_path_name = (char *)smsg_in->path_name;
file_size = wcstombs(NULL, (const wchar_t *restrict)in_file_name, 0) + 1;
path_size = wcstombs(NULL, (const wchar_t *restrict)in_path_name, 0) + 1;
file_name = (char *)malloc(file_size * sizeof(char));
path_name = (char *)malloc(path_size * sizeof(char));
if (!file_name || !path_name) {
free(file_name);
free(path_name);
syslog(LOG_ERR, "Can't allocate memory for file name and/or path name");
return HV_E_FAIL;
}
wcstoutf8(file_name, (__u16 *)in_file_name, file_size);
wcstoutf8(path_name, (__u16 *)in_path_name, path_size);
return hv_fcopy_create_file(file_name, path_name, smsg_in->copy_flags);
}
static int hv_fcopy_send_data(struct hv_fcopy_hdr *fcopy_msg, int recvlen)
{
int operation = fcopy_msg->operation;
/*
* The strings sent from the host are encoded in
* utf16; convert it to utf8 strings.
* The host assures us that the utf16 strings will not exceed
* the max lengths specified. We will however, reserve room
* for the string terminating character - in the utf16s_utf8s()
* function we limit the size of the buffer where the converted
* string is placed to W_MAX_PATH -1 to guarantee
* that the strings can be properly terminated!
*/
switch (operation) {
case START_FILE_COPY:
return hv_fcopy_start((struct hv_start_fcopy *)fcopy_msg);
case WRITE_TO_FILE:
return hv_copy_data((struct hv_do_fcopy *)fcopy_msg);
case COMPLETE_FCOPY:
return hv_copy_finished();
}
return HV_E_FAIL;
}
/* process the packet recv from host */
static int fcopy_pkt_process(struct vmbus_br *txbr)
{
int ret, offset, pktlen;
int fcopy_srv_version;
const struct vmbus_chanpkt_hdr *pkt;
struct hv_fcopy_hdr *fcopy_msg;
struct icmsg_hdr *icmsghdr;
pkt = (const struct vmbus_chanpkt_hdr *)desc;
offset = pkt->hlen << 3;
pktlen = (pkt->tlen << 3) - offset;
icmsghdr = (struct icmsg_hdr *)&desc[offset + sizeof(struct vmbuspipe_hdr)];
icmsghdr->status = HV_E_FAIL;
if (icmsghdr->icmsgtype == ICMSGTYPE_NEGOTIATE) {
if (vmbus_prep_negotiate_resp(icmsghdr, desc + offset, pktlen, fw_versions,
FW_VER_COUNT, fcopy_versions, FCOPY_VER_COUNT,
NULL, &fcopy_srv_version)) {
syslog(LOG_INFO, "FCopy IC version %d.%d",
fcopy_srv_version >> 16, fcopy_srv_version & 0xFFFF);
icmsghdr->status = 0;
}
} else if (icmsghdr->icmsgtype == ICMSGTYPE_FCOPY) {
/* Ensure recvlen is big enough to contain hv_fcopy_hdr */
if (pktlen < ICMSG_HDR + sizeof(struct hv_fcopy_hdr)) {
syslog(LOG_ERR, "Invalid Fcopy hdr. Packet length too small: %u",
pktlen);
return -ENOBUFS;
}
fcopy_msg = (struct hv_fcopy_hdr *)&desc[offset + ICMSG_HDR];
icmsghdr->status = hv_fcopy_send_data(fcopy_msg, pktlen);
}
icmsghdr->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE;
ret = rte_vmbus_chan_send(txbr, 0x6, desc + offset, pktlen, 0);
if (ret) {
syslog(LOG_ERR, "Write to ringbuffer failed err: %d", ret);
return ret;
}
return 0;
}
static void fcopy_get_first_folder(char *path, char *chan_no)
{
DIR *dir = opendir(path);
struct dirent *entry;
if (!dir) {
syslog(LOG_ERR, "Failed to open directory (errno=%s).\n", strerror(errno));
return;
}
while ((entry = readdir(dir)) != NULL) {
if (entry->d_type == DT_DIR && strcmp(entry->d_name, ".") != 0 &&
strcmp(entry->d_name, "..") != 0) {
strcpy(chan_no, entry->d_name);
break;
}
}
closedir(dir);
}
int main(int argc, char *argv[])
{
int fcopy_fd = -1, tmp = 1;
int daemonize = 1, long_index = 0, opt, ret = -EINVAL;
struct vmbus_br txbr, rxbr;
void *ring;
uint32_t len = HV_RING_SIZE;
char uio_name[MAX_FOLDER_NAME] = {0};
char uio_dev_path[MAX_PATH_LEN] = {0};
static struct option long_options[] = {
{"help", no_argument, 0, 'h' },
{"no-daemon", no_argument, 0, 'n' },
{0, 0, 0, 0 }
};
while ((opt = getopt_long(argc, argv, "hn", long_options,
&long_index)) != -1) {
switch (opt) {
case 'n':
daemonize = 0;
break;
case 'h':
default:
print_usage(argv);
goto exit;
}
}
if (daemonize && daemon(1, 0)) {
syslog(LOG_ERR, "daemon() failed; error: %s", strerror(errno));
goto exit;
}
openlog("HV_UIO_FCOPY", 0, LOG_USER);
syslog(LOG_INFO, "starting; pid is:%d", getpid());
fcopy_get_first_folder(FCOPY_UIO, uio_name);
snprintf(uio_dev_path, sizeof(uio_dev_path), "/dev/%s", uio_name);
fcopy_fd = open(uio_dev_path, O_RDWR);
if (fcopy_fd < 0) {
syslog(LOG_ERR, "open %s failed; error: %d %s",
uio_dev_path, errno, strerror(errno));
ret = fcopy_fd;
goto exit;
}
ring = vmbus_uio_map(&fcopy_fd, HV_RING_SIZE);
if (!ring) {
ret = errno;
syslog(LOG_ERR, "mmap ringbuffer failed; error: %d %s", ret, strerror(ret));
goto close;
}
vmbus_br_setup(&txbr, ring, HV_RING_SIZE);
vmbus_br_setup(&rxbr, (char *)ring + HV_RING_SIZE, HV_RING_SIZE);
rxbr.vbr->imask = 0;
while (1) {
/*
* In this loop we process fcopy messages after the
* handshake is complete.
*/
ret = pread(fcopy_fd, &tmp, sizeof(int), 0);
if (ret < 0) {
syslog(LOG_ERR, "pread failed: %s", strerror(errno));
continue;
}
len = HV_RING_SIZE;
ret = rte_vmbus_chan_recv_raw(&rxbr, desc, &len);
if (unlikely(ret <= 0)) {
/* This indicates a failure to communicate (or worse) */
syslog(LOG_ERR, "VMBus channel recv error: %d", ret);
} else {
ret = fcopy_pkt_process(&txbr);
if (ret < 0)
goto close;
/* Signal host */
if ((write(fcopy_fd, &tmp, sizeof(int))) != sizeof(int)) {
ret = errno;
syslog(LOG_ERR, "Signal to host failed: %s\n", strerror(ret));
goto close;
}
}
}
close:
close(fcopy_fd);
exit:
return ret;
}

377
hyper-v.tools.hv.hv_kvp_daemon.c
View File

@ -44,7 +44,7 @@
/* /*
* KVP protocol: The user mode component first registers with the * KVP protocol: The user mode component first registers with the
* the kernel component. Subsequently, the kernel component requests, data * kernel component. Subsequently, the kernel component requests, data
* for the specified keys. In response to this message the user mode component * for the specified keys. In response to this message the user mode component
* fills in the value corresponding to the specified key. We overload the * fills in the value corresponding to the specified key. We overload the
* sequence field in the cn_msg header to define our KVP message types. * sequence field in the cn_msg header to define our KVP message types.
@ -76,6 +76,12 @@ enum {
DNS DNS
}; };
enum {
IPV4 = 1,
IPV6,
IP_TYPE_MAX
};
static int in_hand_shake; static int in_hand_shake;
static char *os_name = ""; static char *os_name = "";
@ -102,6 +108,11 @@ static struct utsname uts_buf;
#define MAX_FILE_NAME 100 #define MAX_FILE_NAME 100
#define ENTRIES_PER_BLOCK 50 #define ENTRIES_PER_BLOCK 50
/*
* Change this entry if the number of addresses increases in future
*/
#define MAX_IP_ENTRIES 64
#define OUTSTR_BUF_SIZE ((INET6_ADDRSTRLEN + 1) * MAX_IP_ENTRIES)
struct kvp_record { struct kvp_record {
char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE]; char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
@ -437,7 +448,7 @@ void kvp_get_os_info(void)
/* /*
* Parse the /etc/os-release file if present: * Parse the /etc/os-release file if present:
* http://www.freedesktop.org/software/systemd/man/os-release.html * https://www.freedesktop.org/software/systemd/man/os-release.html
*/ */
file = fopen("/etc/os-release", "r"); file = fopen("/etc/os-release", "r");
if (file != NULL) { if (file != NULL) {
@ -772,11 +783,11 @@ static int kvp_process_ip_address(void *addrp,
const char *str; const char *str;
if (family == AF_INET) { if (family == AF_INET) {
addr = (struct sockaddr_in *)addrp; addr = addrp;
str = inet_ntop(family, &addr->sin_addr, tmp, 50); str = inet_ntop(family, &addr->sin_addr, tmp, 50);
addr_length = INET_ADDRSTRLEN; addr_length = INET_ADDRSTRLEN;
} else { } else {
addr6 = (struct sockaddr_in6 *)addrp; addr6 = addrp;
str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50); str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
addr_length = INET6_ADDRSTRLEN; addr_length = INET6_ADDRSTRLEN;
} }
@ -1171,11 +1182,156 @@ static int process_ip_string(FILE *f, char *ip_string, int type)
return 0; return 0;
} }
int ip_version_check(const char *input_addr)
{
struct in6_addr addr;
if (inet_pton(AF_INET, input_addr, &addr))
return IPV4;
else if (inet_pton(AF_INET6, input_addr, &addr))
return IPV6;
return -EINVAL;
}
/*
* Only IPv4 subnet strings needs to be converted to plen
* For IPv6 the subnet is already privided in plen format
*/
static int kvp_subnet_to_plen(char *subnet_addr_str)
{
int plen = 0;
struct in_addr subnet_addr4;
/*
* Convert subnet address to binary representation
*/
if (inet_pton(AF_INET, subnet_addr_str, &subnet_addr4) == 1) {
uint32_t subnet_mask = ntohl(subnet_addr4.s_addr);
while (subnet_mask & 0x80000000) {
plen++;
subnet_mask <<= 1;
}
} else {
return -1;
}
return plen;
}
static int process_dns_gateway_nm(FILE *f, char *ip_string, int type,
int ip_sec)
{
char addr[INET6_ADDRSTRLEN], *output_str;
int ip_offset = 0, error = 0, ip_ver;
char *param_name;
if (type == DNS)
param_name = "dns";
else if (type == GATEWAY)
param_name = "gateway";
else
return -EINVAL;
output_str = (char *)calloc(OUTSTR_BUF_SIZE, sizeof(char));
if (!output_str)
return -ENOMEM;
while (1) {
memset(addr, 0, sizeof(addr));
if (!parse_ip_val_buffer(ip_string, &ip_offset, addr,
(MAX_IP_ADDR_SIZE * 2)))
break;
ip_ver = ip_version_check(addr);
if (ip_ver < 0)
continue;
if ((ip_ver == IPV4 && ip_sec == IPV4) ||
(ip_ver == IPV6 && ip_sec == IPV6)) {
/*
* do a bound check to avoid out-of bound writes
*/
if ((OUTSTR_BUF_SIZE - strlen(output_str)) >
(strlen(addr) + 1)) {
strncat(output_str, addr,
OUTSTR_BUF_SIZE -
strlen(output_str) - 1);
strncat(output_str, ",",
OUTSTR_BUF_SIZE -
strlen(output_str) - 1);
}
} else {
continue;
}
}
if (strlen(output_str)) {
/*
* This is to get rid of that extra comma character
* in the end of the string
*/
output_str[strlen(output_str) - 1] = '\0';
error = fprintf(f, "%s=%s\n", param_name, output_str);
}
free(output_str);
return error;
}
static int process_ip_string_nm(FILE *f, char *ip_string, char *subnet,
int ip_sec)
{
char addr[INET6_ADDRSTRLEN];
char subnet_addr[INET6_ADDRSTRLEN];
int error = 0, i = 0;
int ip_offset = 0, subnet_offset = 0;
int plen, ip_ver;
memset(addr, 0, sizeof(addr));
memset(subnet_addr, 0, sizeof(subnet_addr));
while (parse_ip_val_buffer(ip_string, &ip_offset, addr,
(MAX_IP_ADDR_SIZE * 2)) &&
parse_ip_val_buffer(subnet,
&subnet_offset,
subnet_addr,
(MAX_IP_ADDR_SIZE *
2))) {
ip_ver = ip_version_check(addr);
if (ip_ver < 0)
continue;
if (ip_ver == IPV4 && ip_sec == IPV4)
plen = kvp_subnet_to_plen((char *)subnet_addr);
else if (ip_ver == IPV6 && ip_sec == IPV6)
plen = atoi(subnet_addr);
else
continue;
if (plen < 0)
return plen;
error = fprintf(f, "address%d=%s/%d\n", ++i, (char *)addr,
plen);
if (error < 0)
return error;
memset(addr, 0, sizeof(addr));
memset(subnet_addr, 0, sizeof(subnet_addr));
}
return error;
}
static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val) static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
{ {
int error = 0; int error = 0, ip_ver;
char if_file[PATH_MAX]; char if_filename[PATH_MAX];
FILE *file; char nm_filename[PATH_MAX];
FILE *ifcfg_file, *nmfile;
char cmd[PATH_MAX]; char cmd[PATH_MAX];
char *mac_addr; char *mac_addr;
int str_len; int str_len;
@ -1197,7 +1353,7 @@ static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
* in a given distro to configure the interface and so are free * in a given distro to configure the interface and so are free
* ignore information that may not be relevant. * ignore information that may not be relevant.
* *
* Here is the format of the ip configuration file: * Here is the ifcfg format of the ip configuration file:
* *
* HWADDR=macaddr * HWADDR=macaddr
* DEVICE=interface name * DEVICE=interface name
@ -1220,6 +1376,32 @@ static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
* tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
* IPV6NETMASK. * IPV6NETMASK.
* *
* Here is the keyfile format of the ip configuration file:
*
* [ethernet]
* mac-address=macaddr
* [connection]
* interface-name=interface name
*
* [ipv4]
* method=<protocol> (where <protocol> is "auto" if DHCP is configured
* or "manual" if no boot-time protocol should be used)
*
* address1=ipaddr1/plen
* address2=ipaddr2/plen
*
* gateway=gateway1;gateway2
*
* dns=dns1;dns2
*
* [ipv6]
* address1=ipaddr1/plen
* address2=ipaddr2/plen
*
* gateway=gateway1;gateway2
*
* dns=dns1;dns2
*
* The host can specify multiple ipv4 and ipv6 addresses to be * The host can specify multiple ipv4 and ipv6 addresses to be
* configured for the interface. Furthermore, the configuration * configured for the interface. Furthermore, the configuration
* needs to be persistent. A subsequent GET call on the interface * needs to be persistent. A subsequent GET call on the interface
@ -1227,17 +1409,32 @@ static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
* call. * call.
*/ */
snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC, /*
* We are populating both ifcfg and nmconnection files
*/
snprintf(if_filename, sizeof(if_filename), "%s%s%s", KVP_CONFIG_LOC,
"/ifcfg-", if_name); "/ifcfg-", if_name);
file = fopen(if_file, "w"); ifcfg_file = fopen(if_filename, "w");
if (file == NULL) { if (!ifcfg_file) {
syslog(LOG_ERR, "Failed to open config file; error: %d %s", syslog(LOG_ERR, "Failed to open config file; error: %d %s",
errno, strerror(errno)); errno, strerror(errno));
return HV_E_FAIL; return HV_E_FAIL;
} }
snprintf(nm_filename, sizeof(nm_filename), "%s%s%s%s", KVP_CONFIG_LOC,
"/", if_name, ".nmconnection");
nmfile = fopen(nm_filename, "w");
if (!nmfile) {
syslog(LOG_ERR, "Failed to open config file; error: %d %s",
errno, strerror(errno));
fclose(ifcfg_file);
return HV_E_FAIL;
}
/* /*
* First write out the MAC address. * First write out the MAC address.
*/ */
@ -1248,14 +1445,31 @@ static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
goto setval_error; goto setval_error;
} }
error = kvp_write_file(file, "HWADDR", "", mac_addr); error = kvp_write_file(ifcfg_file, "HWADDR", "", mac_addr);
free(mac_addr); if (error < 0)
if (error) goto setmac_error;
goto setval_error;
error = kvp_write_file(file, "DEVICE", "", if_name); error = kvp_write_file(ifcfg_file, "DEVICE", "", if_name);
if (error < 0)
goto setmac_error;
error = fprintf(nmfile, "\n[connection]\n");
if (error < 0)
goto setmac_error;
error = kvp_write_file(nmfile, "interface-name", "", if_name);
if (error) if (error)
goto setval_error; goto setmac_error;
error = fprintf(nmfile, "\n[ethernet]\n");
if (error < 0)
goto setmac_error;
error = kvp_write_file(nmfile, "mac-address", "", mac_addr);
if (error)
goto setmac_error;
free(mac_addr);
/* /*
* The dhcp_enabled flag is only for IPv4. In the case the host only * The dhcp_enabled flag is only for IPv4. In the case the host only
@ -1263,47 +1477,137 @@ static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
* proceed to parse and pass the IPv6 information to the * proceed to parse and pass the IPv6 information to the
* disto-specific script hv_set_ifconfig. * disto-specific script hv_set_ifconfig.
*/ */
/*
* First populate the ifcfg file format
*/
if (new_val->dhcp_enabled) { if (new_val->dhcp_enabled) {
error = kvp_write_file(file, "BOOTPROTO", "", "dhcp"); error = kvp_write_file(ifcfg_file, "BOOTPROTO", "", "dhcp");
if (error)
goto setval_error;
} else {
error = kvp_write_file(ifcfg_file, "BOOTPROTO", "", "none");
if (error)
goto setval_error;
}
error = process_ip_string(ifcfg_file, (char *)new_val->ip_addr,
IPADDR);
if (error) if (error)
goto setval_error; goto setval_error;
} else { error = process_ip_string(ifcfg_file, (char *)new_val->sub_net,
error = kvp_write_file(file, "BOOTPROTO", "", "none"); NETMASK);
if (error) if (error)
goto setval_error; goto setval_error;
error = process_ip_string(ifcfg_file, (char *)new_val->gate_way,
GATEWAY);
if (error)
goto setval_error;
error = process_ip_string(ifcfg_file, (char *)new_val->dns_addr, DNS);
if (error)
goto setval_error;
/*
* Now we populate the keyfile format
*
* The keyfile format expects the IPv6 and IPv4 configuration in
* different sections. Therefore we iterate through the list twice,
* once to populate the IPv4 section and the next time for IPv6
*/
ip_ver = IPV4;
do {
if (ip_ver == IPV4) {
error = fprintf(nmfile, "\n[ipv4]\n");
if (error < 0)
goto setval_error;
} else {
error = fprintf(nmfile, "\n[ipv6]\n");
if (error < 0)
goto setval_error;
} }
/* /*
* Write the configuration for ipaddress, netmask, gateway and * Write the configuration for ipaddress, netmask, gateway and
* name servers. * name services
*/ */
error = process_ip_string_nm(nmfile, (char *)new_val->ip_addr,
error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR); (char *)new_val->sub_net,
if (error) ip_ver);
if (error < 0)
goto setval_error; goto setval_error;
error = process_ip_string(file, (char *)new_val->sub_net, NETMASK); /*
if (error) * As dhcp_enabled is only valid for ipv4, we do not set dhcp
* methods for ipv6 based on dhcp_enabled flag.
*
* For ipv4, set method to manual only when dhcp_enabled is
* false and specific ipv4 addresses are configured. If neither
* dhcp_enabled is true and no ipv4 addresses are configured,
* set method to 'disabled'.
*
* For ipv6, set method to manual when we configure ipv6
* addresses. Otherwise set method to 'auto' so that SLAAC from
* RA may be used.
*/
if (ip_ver == IPV4) {
if (new_val->dhcp_enabled) {
error = kvp_write_file(nmfile, "method", "",
"auto");
if (error < 0)
goto setval_error;
} else if (error) {
error = kvp_write_file(nmfile, "method", "",
"manual");
if (error < 0)
goto setval_error;
} else {
error = kvp_write_file(nmfile, "method", "",
"disabled");
if (error < 0)
goto setval_error;
}
} else if (ip_ver == IPV6) {
if (error) {
error = kvp_write_file(nmfile, "method", "",
"manual");
if (error < 0)
goto setval_error;
} else {
error = kvp_write_file(nmfile, "method", "",
"auto");
if (error < 0)
goto setval_error;
}
}
error = process_dns_gateway_nm(nmfile,
(char *)new_val->gate_way,
GATEWAY, ip_ver);
if (error < 0)
goto setval_error; goto setval_error;
error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY); error = process_dns_gateway_nm(nmfile,
if (error) (char *)new_val->dns_addr, DNS,
ip_ver);
if (error < 0)
goto setval_error; goto setval_error;
error = process_ip_string(file, (char *)new_val->dns_addr, DNS); ip_ver++;
if (error) } while (ip_ver < IP_TYPE_MAX);
goto setval_error;
fclose(file); fclose(nmfile);
fclose(ifcfg_file);
/* /*
* Now that we have populated the configuration file, * Now that we have populated the configuration file,
* invoke the external script to do its magic. * invoke the external script to do its magic.
*/ */
str_len = snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s", str_len = snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s %s",
"hv_set_ifconfig", if_file); "hv_set_ifconfig", if_filename, nm_filename);
/* /*
* This is a little overcautious, but it's necessary to suppress some * This is a little overcautious, but it's necessary to suppress some
* false warnings from gcc 8.0.1. * false warnings from gcc 8.0.1.
@ -1321,10 +1625,13 @@ static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
} }
return 0; return 0;
setmac_error:
free(mac_addr);
setval_error: setval_error:
syslog(LOG_ERR, "Failed to write config file. error: %d %s", syslog(LOG_ERR, "Failed to write config file. error: %d %s",
errno, strerror(errno)); errno, strerror(errno));
fclose(file); fclose(ifcfg_file);
fclose(nmfile);
return error; return error;
} }

45
hyper-v.tools.hv.hv_set_ifconfig.sh
View File

@ -7,7 +7,7 @@
# The only argument to this script is the configuration file that is to # The only argument to this script is the configuration file that is to
# be used to configure the interface. # be used to configure the interface.
# #
# Here is the format of the ip configuration file: # Here is the ifcfg format of the ip configuration file:
# #
# HWADDR=macaddr # HWADDR=macaddr
# DEVICE=interface name # DEVICE=interface name
@ -30,14 +30,41 @@
# tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as # tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
# IPV6NETMASK. # IPV6NETMASK.
# #
# Here is the keyfile format of the ip configuration file:
#
# [ethernet]
# mac-address=macaddr
# [connection]
# interface-name=interface name
#
# [ipv4]
# method=<protocol> (where <protocol> is "auto" if DHCP is configured
# or "manual" if no boot-time protocol should be used)
#
# address1=ipaddr1/plen
# address2=ipaddr2/plen
#
# gateway=gateway1;gateway2
#
# dns=dns1;
#
# [ipv6]
# address1=ipaddr1/plen
# address2=ipaddr2/plen
#
# gateway=gateway1;gateway2
#
# dns=dns1;dns2
#
# The host can specify multiple ipv4 and ipv6 addresses to be # The host can specify multiple ipv4 and ipv6 addresses to be
# configured for the interface. Furthermore, the configuration # configured for the interface. Furthermore, the configuration
# needs to be persistent. A subsequent GET call on the interface # needs to be persistent. A subsequent GET call on the interface
# is expected to return the configuration that is set via the SET # is expected to return the configuration that is set via the SET
# call. # call.
# #
cfg=$1 if_cfg=$1
if ! test -f "${cfg}" nm_cfg=$2
if ! test -f "${if_cfg}"
then then
: expect configuration datafile as first argument : expect configuration datafile as first argument
exit 1 exit 1
@ -86,11 +113,11 @@ unset ${!IPV6ADDR*}
unset ${!IPV6NETMASK*} unset ${!IPV6NETMASK*}
unset ${!IPV6_DEFAULTGW*} unset ${!IPV6_DEFAULTGW*}
unset ${!DNS*} unset ${!DNS*}
. "$1" . "${if_cfg}"
# #
if test -z "${DEVICE}" if test -z "${DEVICE}"
then then
echo "Missing DEVICE= in ${cfg}" echo "Missing DEVICE= in ${if_cfg}"
exit 1 exit 1
fi fi
# #
@ -200,6 +227,7 @@ do
done done
# #
echo "$0: working on network interface ifcfg-${DEVICE}" echo "$0: working on network interface ifcfg-${DEVICE}"
mkdir -vp "/etc/sysconfig/network"
cp -fb ${t_ifcfg} "/etc/sysconfig/network/ifcfg-${DEVICE}" cp -fb ${t_ifcfg} "/etc/sysconfig/network/ifcfg-${DEVICE}"
cp -fb ${t_ifroute} "/etc/sysconfig/network/ifroute-${DEVICE}" cp -fb ${t_ifroute} "/etc/sysconfig/network/ifroute-${DEVICE}"
if test -w /etc/sysconfig/network/config if test -w /etc/sysconfig/network/config
@ -207,6 +235,13 @@ then
sed -i "s@^NETCONFIG_DNS_STATIC_SERVERS=.*@NETCONFIG_DNS_STATIC_SERVERS='$_DNS_'@" /etc/sysconfig/network/config sed -i "s@^NETCONFIG_DNS_STATIC_SERVERS=.*@NETCONFIG_DNS_STATIC_SERVERS='$_DNS_'@" /etc/sysconfig/network/config
netconfig update -m dns netconfig update -m dns
fi fi
echo "$0: working on network interface ifcfg-${DEVICE}"
nm_filename="${nm_cfg##*/}"
mkdir -vp "/etc/NetworkManager/system-connections"
umask 0177
sed '/\[connection\]/a autoconnect=true' "${nm_cfg}" > "/etc/NetworkManager/system-connections/${nm_filename}"
ifdown "${DEVICE}" ifdown "${DEVICE}"
ifup "${DEVICE}" ifup "${DEVICE}"
) 2>&1 | logger -t "${0##*/}[$PPID / $$]" ) 2>&1 | logger -t "${0##*/}[$PPID / $$]"

318
hyper-v.tools.hv.vmbus_bufring.c Normal file
View File

@ -0,0 +1,318 @@
// SPDX-License-Identifier: BSD-3-Clause
/*
* Copyright (c) 2009-2012,2016,2023 Microsoft Corp.
* Copyright (c) 2012 NetApp Inc.
* Copyright (c) 2012 Citrix Inc.
* All rights reserved.
*/
#include <errno.h>
#include <fcntl.h>
#include <emmintrin.h>
#include <linux/limits.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/uio.h>
#include <unistd.h>
#include "vmbus_bufring.h"
/**
* Compiler barrier.
*
* Guarantees that operation reordering does not occur at compile time
* for operations directly before and after the barrier.
*/
#define rte_compiler_barrier() ({ asm volatile ("" : : : "memory"); })
#define VMBUS_RQST_ERROR 0xFFFFFFFFFFFFFFFF
#define ALIGN(val, align) ((typeof(val))((val) & (~((typeof(val))((align) - 1)))))
void *vmbus_uio_map(int *fd, int size)
{
void *map;
map = mmap(NULL, 2 * size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
if (map == MAP_FAILED)
return NULL;
return map;
}
/* Increase bufring index by inc with wraparound */
static inline uint32_t vmbus_br_idxinc(uint32_t idx, uint32_t inc, uint32_t sz)
{
idx += inc;
if (idx >= sz)
idx -= sz;
return idx;
}
void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen)
{
br->vbr = buf;
br->windex = br->vbr->windex;
br->dsize = blen - sizeof(struct vmbus_bufring);
}
static inline __always_inline void
rte_smp_mb(void)
{
asm volatile("lock addl $0, -128(%%rsp); " ::: "memory");
}
static inline int
rte_atomic32_cmpset(volatile uint32_t *dst, uint32_t exp, uint32_t src)
{
uint8_t res;
asm volatile("lock ; "
"cmpxchgl %[src], %[dst];"
"sete %[res];"
: [res] "=a" (res), /* output */
[dst] "=m" (*dst)
: [src] "r" (src), /* input */
"a" (exp),
"m" (*dst)
: "memory"); /* no-clobber list */
return res;
}
static inline uint32_t
vmbus_txbr_copyto(const struct vmbus_br *tbr, uint32_t windex,
const void *src0, uint32_t cplen)
{
uint8_t *br_data = tbr->vbr->data;
uint32_t br_dsize = tbr->dsize;
const uint8_t *src = src0;
/* XXX use double mapping like Linux kernel? */
if (cplen > br_dsize - windex) {
uint32_t fraglen = br_dsize - windex;
/* Wrap-around detected */
memcpy(br_data + windex, src, fraglen);
memcpy(br_data, src + fraglen, cplen - fraglen);
} else {
memcpy(br_data + windex, src, cplen);
}
return vmbus_br_idxinc(windex, cplen, br_dsize);
}
/*
* Write scattered channel packet to TX bufring.
*
* The offset of this channel packet is written as a 64bits value
* immediately after this channel packet.
*
* The write goes through three stages:
* 1. Reserve space in ring buffer for the new data.
* Writer atomically moves priv_write_index.
* 2. Copy the new data into the ring.
* 3. Update the tail of the ring (visible to host) that indicates
* next read location. Writer updates write_index
*/
static int
vmbus_txbr_write(struct vmbus_br *tbr, const struct iovec iov[], int iovlen)
{
struct vmbus_bufring *vbr = tbr->vbr;
uint32_t ring_size = tbr->dsize;
uint32_t old_windex, next_windex, windex, total;
uint64_t save_windex;
int i;
total = 0;
for (i = 0; i < iovlen; i++)
total += iov[i].iov_len;
total += sizeof(save_windex);
/* Reserve space in ring */
do {
uint32_t avail;
/* Get current free location */
old_windex = tbr->windex;
/* Prevent compiler reordering this with calculation */
rte_compiler_barrier();
avail = vmbus_br_availwrite(tbr, old_windex);
/* If not enough space in ring, then tell caller. */
if (avail <= total)
return -EAGAIN;
next_windex = vmbus_br_idxinc(old_windex, total, ring_size);
/* Atomic update of next write_index for other threads */
} while (!rte_atomic32_cmpset(&tbr->windex, old_windex, next_windex));
/* Space from old..new is now reserved */
windex = old_windex;
for (i = 0; i < iovlen; i++)
windex = vmbus_txbr_copyto(tbr, windex, iov[i].iov_base, iov[i].iov_len);
/* Set the offset of the current channel packet. */
save_windex = ((uint64_t)old_windex) << 32;
windex = vmbus_txbr_copyto(tbr, windex, &save_windex,
sizeof(save_windex));
/* The region reserved should match region used */
if (windex != next_windex)
return -EINVAL;
/* Ensure that data is available before updating host index */
rte_compiler_barrier();
/* Checkin for our reservation. wait for our turn to update host */
while (!rte_atomic32_cmpset(&vbr->windex, old_windex, next_windex))
_mm_pause();
return 0;
}
int rte_vmbus_chan_send(struct vmbus_br *txbr, uint16_t type, void *data,
uint32_t dlen, uint32_t flags)
{
struct vmbus_chanpkt pkt;
unsigned int pktlen, pad_pktlen;
const uint32_t hlen = sizeof(pkt);
uint64_t pad = 0;
struct iovec iov[3];
int error;
pktlen = hlen + dlen;
pad_pktlen = ALIGN(pktlen, sizeof(uint64_t));
pkt.hdr.type = type;
pkt.hdr.flags = flags;
pkt.hdr.hlen = hlen >> VMBUS_CHANPKT_SIZE_SHIFT;
pkt.hdr.tlen = pad_pktlen >> VMBUS_CHANPKT_SIZE_SHIFT;
pkt.hdr.xactid = VMBUS_RQST_ERROR;
iov[0].iov_base = &pkt;
iov[0].iov_len = hlen;
iov[1].iov_base = data;
iov[1].iov_len = dlen;
iov[2].iov_base = &pad;
iov[2].iov_len = pad_pktlen - pktlen;
error = vmbus_txbr_write(txbr, iov, 3);
return error;
}
static inline uint32_t
vmbus_rxbr_copyfrom(const struct vmbus_br *rbr, uint32_t rindex,
void *dst0, size_t cplen)
{
const uint8_t *br_data = rbr->vbr->data;
uint32_t br_dsize = rbr->dsize;
uint8_t *dst = dst0;
if (cplen > br_dsize - rindex) {
uint32_t fraglen = br_dsize - rindex;
/* Wrap-around detected. */
memcpy(dst, br_data + rindex, fraglen);
memcpy(dst + fraglen, br_data, cplen - fraglen);
} else {
memcpy(dst, br_data + rindex, cplen);
}
return vmbus_br_idxinc(rindex, cplen, br_dsize);
}
/* Copy data from receive ring but don't change index */
static int
vmbus_rxbr_peek(const struct vmbus_br *rbr, void *data, size_t dlen)
{
uint32_t avail;
/*
* The requested data and the 64bits channel packet
* offset should be there at least.
*/
avail = vmbus_br_availread(rbr);
if (avail < dlen + sizeof(uint64_t))
return -EAGAIN;
vmbus_rxbr_copyfrom(rbr, rbr->vbr->rindex, data, dlen);
return 0;
}
/*
* Copy data from receive ring and change index
* NOTE:
* We assume (dlen + skip) == sizeof(channel packet).
*/
static int
vmbus_rxbr_read(struct vmbus_br *rbr, void *data, size_t dlen, size_t skip)
{
struct vmbus_bufring *vbr = rbr->vbr;
uint32_t br_dsize = rbr->dsize;
uint32_t rindex;
if (vmbus_br_availread(rbr) < dlen + skip + sizeof(uint64_t))
return -EAGAIN;
/* Record where host was when we started read (for debug) */
rbr->windex = rbr->vbr->windex;
/*
* Copy channel packet from RX bufring.
*/
rindex = vmbus_br_idxinc(rbr->vbr->rindex, skip, br_dsize);
rindex = vmbus_rxbr_copyfrom(rbr, rindex, data, dlen);
/*
* Discard this channel packet's 64bits offset, which is useless to us.
*/
rindex = vmbus_br_idxinc(rindex, sizeof(uint64_t), br_dsize);
/* Update the read index _after_ the channel packet is fetched. */
rte_compiler_barrier();
vbr->rindex = rindex;
return 0;
}
int rte_vmbus_chan_recv_raw(struct vmbus_br *rxbr,
void *data, uint32_t *len)
{
struct vmbus_chanpkt_hdr pkt;
uint32_t dlen, bufferlen = *len;
int error;
error = vmbus_rxbr_peek(rxbr, &pkt, sizeof(pkt));
if (error)
return error;
if (unlikely(pkt.hlen < VMBUS_CHANPKT_HLEN_MIN))
/* XXX this channel is dead actually. */
return -EIO;
if (unlikely(pkt.hlen > pkt.tlen))
return -EIO;
/* Length are in quad words */
dlen = pkt.tlen << VMBUS_CHANPKT_SIZE_SHIFT;
*len = dlen;
/* If caller buffer is not large enough */
if (unlikely(dlen > bufferlen))
return -ENOBUFS;
/* Read data and skip packet header */
error = vmbus_rxbr_read(rxbr, data, dlen, 0);
if (error)
return error;
/* Return the number of bytes read */
return dlen + sizeof(uint64_t);
}

158
hyper-v.tools.hv.vmbus_bufring.h Normal file
View File

@ -0,0 +1,158 @@
/* SPDX-License-Identifier: BSD-3-Clause */
#ifndef _VMBUS_BUF_H_
#define _VMBUS_BUF_H_
#include <stdbool.h>
#include <stdint.h>
#define __packed __attribute__((__packed__))
#define unlikely(x) __builtin_expect(!!(x), 0)
#define ICMSGHDRFLAG_TRANSACTION 1
#define ICMSGHDRFLAG_REQUEST 2
#define ICMSGHDRFLAG_RESPONSE 4
#define IC_VERSION_NEGOTIATION_MAX_VER_COUNT 100
#define ICMSG_HDR (sizeof(struct vmbuspipe_hdr) + sizeof(struct icmsg_hdr))
#define ICMSG_NEGOTIATE_PKT_SIZE(icframe_vercnt, icmsg_vercnt) \
(ICMSG_HDR + sizeof(struct icmsg_negotiate) + \
(((icframe_vercnt) + (icmsg_vercnt)) * sizeof(struct ic_version)))
/*
* Channel packets
*/
/* Channel packet flags */
#define VMBUS_CHANPKT_TYPE_INBAND 0x0006
#define VMBUS_CHANPKT_TYPE_RXBUF 0x0007
#define VMBUS_CHANPKT_TYPE_GPA 0x0009
#define VMBUS_CHANPKT_TYPE_COMP 0x000b
#define VMBUS_CHANPKT_FLAG_NONE 0
#define VMBUS_CHANPKT_FLAG_RC 0x0001 /* report completion */
#define VMBUS_CHANPKT_SIZE_SHIFT 3
#define VMBUS_CHANPKT_SIZE_ALIGN BIT(VMBUS_CHANPKT_SIZE_SHIFT)
#define VMBUS_CHANPKT_HLEN_MIN \
(sizeof(struct vmbus_chanpkt_hdr) >> VMBUS_CHANPKT_SIZE_SHIFT)
/*
* Buffer ring
*/
struct vmbus_bufring {
volatile uint32_t windex;
volatile uint32_t rindex;
/*
* Interrupt mask {0,1}
*
* For TX bufring, host set this to 1, when it is processing
* the TX bufring, so that we can safely skip the TX event
* notification to host.
*
* For RX bufring, once this is set to 1 by us, host will not
* further dispatch interrupts to us, even if there are data
* pending on the RX bufring. This effectively disables the
* interrupt of the channel to which this RX bufring is attached.
*/
volatile uint32_t imask;
/*
* Win8 uses some of the reserved bits to implement
* interrupt driven flow management. On the send side
* we can request that the receiver interrupt the sender
* when the ring transitions from being full to being able
* to handle a message of size "pending_send_sz".
*
* Add necessary state for this enhancement.
*/
volatile uint32_t pending_send;
uint32_t reserved1[12];
union {
struct {
uint32_t feat_pending_send_sz:1;
};
uint32_t value;
} feature_bits;
/* Pad it to rte_mem_page_size() so that data starts on page boundary */
uint8_t reserved2[4028];
/*
* Ring data starts here + RingDataStartOffset
* !!! DO NOT place any fields below this !!!
*/
uint8_t data[];
} __packed;
struct vmbus_br {
struct vmbus_bufring *vbr;
uint32_t dsize;
uint32_t windex; /* next available location */
};
struct vmbus_chanpkt_hdr {
uint16_t type; /* VMBUS_CHANPKT_TYPE_ */
uint16_t hlen; /* header len, in 8 bytes */
uint16_t tlen; /* total len, in 8 bytes */
uint16_t flags; /* VMBUS_CHANPKT_FLAG_ */
uint64_t xactid;
} __packed;
struct vmbus_chanpkt {
struct vmbus_chanpkt_hdr hdr;
} __packed;
struct vmbuspipe_hdr {
unsigned int flags;
unsigned int msgsize;
} __packed;
struct ic_version {
unsigned short major;
unsigned short minor;
} __packed;
struct icmsg_negotiate {
unsigned short icframe_vercnt;
unsigned short icmsg_vercnt;
unsigned int reserved;
struct ic_version icversion_data[]; /* any size array */
} __packed;
struct icmsg_hdr {
struct ic_version icverframe;
unsigned short icmsgtype;
struct ic_version icvermsg;
unsigned short icmsgsize;
unsigned int status;
unsigned char ictransaction_id;
unsigned char icflags;
unsigned char reserved[2];
} __packed;
int rte_vmbus_chan_recv_raw(struct vmbus_br *rxbr, void *data, uint32_t *len);
int rte_vmbus_chan_send(struct vmbus_br *txbr, uint16_t type, void *data,
uint32_t dlen, uint32_t flags);
void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen);
void *vmbus_uio_map(int *fd, int size);
/* Amount of space available for write */
static inline uint32_t vmbus_br_availwrite(const struct vmbus_br *br, uint32_t windex)
{
uint32_t rindex = br->vbr->rindex;
if (windex >= rindex)
return br->dsize - (windex - rindex);
else
return rindex - windex;
}
static inline uint32_t vmbus_br_availread(const struct vmbus_br *br)
{
return br->dsize - vmbus_br_availwrite(br, br->vbr->windex);
}
#endif /* !_VMBUS_BUF_H_ */