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SubjectRe: [PATCH] hv_sock: use HV_HYP_PAGE_SIZE instead of PAGE_SIZE_4K
Hi Himadri,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[cannot apply to v5.3-rc1 next-20190726]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Himadri-Pandya/hv_sock-use-HV_HYP_PAGE_SIZE-instead-of-PAGE_SIZE_4K/20190726-085229
reproduce:
# apt-get install sparse
# sparse version: v0.6.1-rc1-7-g2b96cd8-dirty
make ARCH=x86_64 allmodconfig
make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)

include/linux/sched.h:609:43: sparse: sparse: bad integer constant expression
include/linux/sched.h:609:73: sparse: sparse: invalid named zero-width bitfield `value'
include/linux/sched.h:610:43: sparse: sparse: bad integer constant expression
include/linux/sched.h:610:67: sparse: sparse: invalid named zero-width bitfield `bucket_id'
net/vmw_vsock/hyperv_transport.c:214:39: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:214:39: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
>> net/vmw_vsock/hyperv_transport.c:214:39: sparse: sparse: incompatible types for operation (-)
>> net/vmw_vsock/hyperv_transport.c:214:39: sparse: left side has type bad type
>> net/vmw_vsock/hyperv_transport.c:214:39: sparse: right side has type int
net/vmw_vsock/hyperv_transport.c:214:39: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
>> net/vmw_vsock/hyperv_transport.c:214:39: sparse: sparse: incompatible types for operation (-)
>> net/vmw_vsock/hyperv_transport.c:214:39: sparse: left side has type bad type
>> net/vmw_vsock/hyperv_transport.c:214:39: sparse: right side has type int
net/vmw_vsock/hyperv_transport.c:65:17: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
>> net/vmw_vsock/hyperv_transport.c:65:17: sparse: sparse: bad constant expression type
net/vmw_vsock/hyperv_transport.c:387:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:388:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
>> net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
>> net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
>> net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
>> net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
>> net/vmw_vsock/hyperv_transport.c:390:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:391:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:392:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:392:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:392:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:392:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:393:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:394:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:395:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:395:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:395:26: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:395:26: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:465:25: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:466:25: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:666:9: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: cast from unknown type
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: undefined identifier 'HV_HYP_PAGE_SIZE'
net/vmw_vsock/hyperv_transport.c:681:28: sparse: sparse: cast from unknown type

vim +214 net/vmw_vsock/hyperv_transport.c

ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 59
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 60 struct hvs_send_buf {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 61 /* The header before the payload data */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 62 struct vmpipe_proto_header hdr;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 63
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 64 /* The payload */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 @65 u8 data[HVS_SEND_BUF_SIZE];
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 66 };
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 67
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 68 #define HVS_HEADER_LEN (sizeof(struct vmpacket_descriptor) + \
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 69 sizeof(struct vmpipe_proto_header))
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 70
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 71 /* See 'prev_indices' in hv_ringbuffer_read(), hv_ringbuffer_write(), and
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 72 * __hv_pkt_iter_next().
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 73 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 74 #define VMBUS_PKT_TRAILER_SIZE (sizeof(u64))
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 75
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 76 #define HVS_PKT_LEN(payload_len) (HVS_HEADER_LEN + \
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 77 ALIGN((payload_len), 8) + \
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 78 VMBUS_PKT_TRAILER_SIZE)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 79
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 80 union hvs_service_id {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 81 uuid_le srv_id;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 82
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 83 struct {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 84 unsigned int svm_port;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 85 unsigned char b[sizeof(uuid_le) - sizeof(unsigned int)];
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 86 };
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 87 };
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 88
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 89 /* Per-socket state (accessed via vsk->trans) */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 90 struct hvsock {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 91 struct vsock_sock *vsk;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 92
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 93 uuid_le vm_srv_id;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 94 uuid_le host_srv_id;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 95
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 96 struct vmbus_channel *chan;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 97 struct vmpacket_descriptor *recv_desc;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 98
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 99 /* The length of the payload not delivered to userland yet */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 100 u32 recv_data_len;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 101 /* The offset of the payload */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 102 u32 recv_data_off;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 103
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 104 /* Have we sent the zero-length packet (FIN)? */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 105 bool fin_sent;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 106 };
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 107
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 108 /* In the VM, we support Hyper-V Sockets with AF_VSOCK, and the endpoint is
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 109 * <cid, port> (see struct sockaddr_vm). Note: cid is not really used here:
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 110 * when we write apps to connect to the host, we can only use VMADDR_CID_ANY
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 111 * or VMADDR_CID_HOST (both are equivalent) as the remote cid, and when we
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 112 * write apps to bind() & listen() in the VM, we can only use VMADDR_CID_ANY
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 113 * as the local cid.
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 114 *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 115 * On the host, Hyper-V Sockets are supported by Winsock AF_HYPERV:
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 116 * https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/user-
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 117 * guide/make-integration-service, and the endpoint is <VmID, ServiceId> with
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 118 * the below sockaddr:
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 119 *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 120 * struct SOCKADDR_HV
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 121 * {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 122 * ADDRESS_FAMILY Family;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 123 * USHORT Reserved;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 124 * GUID VmId;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 125 * GUID ServiceId;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 126 * };
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 127 * Note: VmID is not used by Linux VM and actually it isn't transmitted via
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 128 * VMBus, because here it's obvious the host and the VM can easily identify
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 129 * each other. Though the VmID is useful on the host, especially in the case
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 130 * of Windows container, Linux VM doesn't need it at all.
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 131 *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 132 * To make use of the AF_VSOCK infrastructure in Linux VM, we have to limit
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 133 * the available GUID space of SOCKADDR_HV so that we can create a mapping
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 134 * between AF_VSOCK port and SOCKADDR_HV Service GUID. The rule of writing
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 135 * Hyper-V Sockets apps on the host and in Linux VM is:
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 136 *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 137 ****************************************************************************
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 138 * The only valid Service GUIDs, from the perspectives of both the host and *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 139 * Linux VM, that can be connected by the other end, must conform to this *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 140 * format: <port>-facb-11e6-bd58-64006a7986d3, and the "port" must be in *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 141 * this range [0, 0x7FFFFFFF]. *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 142 ****************************************************************************
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 143 *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 144 * When we write apps on the host to connect(), the GUID ServiceID is used.
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 145 * When we write apps in Linux VM to connect(), we only need to specify the
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 146 * port and the driver will form the GUID and use that to request the host.
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 147 *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 148 * From the perspective of Linux VM:
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 149 * 1. the local ephemeral port (i.e. the local auto-bound port when we call
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 150 * connect() without explicit bind()) is generated by __vsock_bind_stream(),
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 151 * and the range is [1024, 0xFFFFFFFF).
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 152 * 2. the remote ephemeral port (i.e. the auto-generated remote port for
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 153 * a connect request initiated by the host's connect()) is generated by
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 154 * hvs_remote_addr_init() and the range is [0x80000000, 0xFFFFFFFF).
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 155 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 156
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 157 #define MAX_LISTEN_PORT ((u32)0x7FFFFFFF)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 158 #define MAX_VM_LISTEN_PORT MAX_LISTEN_PORT
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 159 #define MAX_HOST_LISTEN_PORT MAX_LISTEN_PORT
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 160 #define MIN_HOST_EPHEMERAL_PORT (MAX_HOST_LISTEN_PORT + 1)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 161
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 162 /* 00000000-facb-11e6-bd58-64006a7986d3 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 163 static const uuid_le srv_id_template =
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 164 UUID_LE(0x00000000, 0xfacb, 0x11e6, 0xbd, 0x58,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 165 0x64, 0x00, 0x6a, 0x79, 0x86, 0xd3);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 166
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 167 static bool is_valid_srv_id(const uuid_le *id)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 168 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 169 return !memcmp(&id->b[4], &srv_id_template.b[4], sizeof(uuid_le) - 4);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 170 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 171
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 172 static unsigned int get_port_by_srv_id(const uuid_le *svr_id)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 173 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 174 return *((unsigned int *)svr_id);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 175 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 176
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 177 static void hvs_addr_init(struct sockaddr_vm *addr, const uuid_le *svr_id)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 178 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 179 unsigned int port = get_port_by_srv_id(svr_id);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 180
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 181 vsock_addr_init(addr, VMADDR_CID_ANY, port);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 182 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 183
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 184 static void hvs_remote_addr_init(struct sockaddr_vm *remote,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 185 struct sockaddr_vm *local)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 186 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 187 static u32 host_ephemeral_port = MIN_HOST_EPHEMERAL_PORT;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 188 struct sock *sk;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 189
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 190 vsock_addr_init(remote, VMADDR_CID_ANY, VMADDR_PORT_ANY);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 191
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 192 while (1) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 193 /* Wrap around ? */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 194 if (host_ephemeral_port < MIN_HOST_EPHEMERAL_PORT ||
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 195 host_ephemeral_port == VMADDR_PORT_ANY)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 196 host_ephemeral_port = MIN_HOST_EPHEMERAL_PORT;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 197
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 198 remote->svm_port = host_ephemeral_port++;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 199
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 200 sk = vsock_find_connected_socket(remote, local);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 201 if (!sk) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 202 /* Found an available ephemeral port */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 203 return;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 204 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 205
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 206 /* Release refcnt got in vsock_find_connected_socket */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 207 sock_put(sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 208 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 209 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 210
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 211 static void hvs_set_channel_pending_send_size(struct vmbus_channel *chan)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 212 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 213 set_channel_pending_send_size(chan,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 @214 HVS_PKT_LEN(HVS_SEND_BUF_SIZE));
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 215
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 216 virt_mb();
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 217 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 218
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 219 static bool hvs_channel_readable(struct vmbus_channel *chan)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 220 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 221 u32 readable = hv_get_bytes_to_read(&chan->inbound);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 222
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 223 /* 0-size payload means FIN */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 224 return readable >= HVS_PKT_LEN(0);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 225 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 226
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 227 static int hvs_channel_readable_payload(struct vmbus_channel *chan)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 228 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 229 u32 readable = hv_get_bytes_to_read(&chan->inbound);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 230
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 231 if (readable > HVS_PKT_LEN(0)) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 232 /* At least we have 1 byte to read. We don't need to return
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 233 * the exact readable bytes: see vsock_stream_recvmsg() ->
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 234 * vsock_stream_has_data().
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 235 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 236 return 1;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 237 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 238
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 239 if (readable == HVS_PKT_LEN(0)) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 240 /* 0-size payload means FIN */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 241 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 242 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 243
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 244 /* No payload or FIN */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 245 return -1;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 246 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 247
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 248 static size_t hvs_channel_writable_bytes(struct vmbus_channel *chan)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 249 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 250 u32 writeable = hv_get_bytes_to_write(&chan->outbound);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 251 size_t ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 252
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 253 /* The ringbuffer mustn't be 100% full, and we should reserve a
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 254 * zero-length-payload packet for the FIN: see hv_ringbuffer_write()
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 255 * and hvs_shutdown().
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 256 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 257 if (writeable <= HVS_PKT_LEN(1) + HVS_PKT_LEN(0))
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 258 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 259
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 260 ret = writeable - HVS_PKT_LEN(1) - HVS_PKT_LEN(0);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 261
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 262 return round_down(ret, 8);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 263 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 264
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 265 static int hvs_send_data(struct vmbus_channel *chan,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 266 struct hvs_send_buf *send_buf, size_t to_write)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 267 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 268 send_buf->hdr.pkt_type = 1;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 269 send_buf->hdr.data_size = to_write;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 270 return vmbus_sendpacket(chan, &send_buf->hdr,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 271 sizeof(send_buf->hdr) + to_write,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 272 0, VM_PKT_DATA_INBAND, 0);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 273 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 274
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 275 static void hvs_channel_cb(void *ctx)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 276 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 277 struct sock *sk = (struct sock *)ctx;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 278 struct vsock_sock *vsk = vsock_sk(sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 279 struct hvsock *hvs = vsk->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 280 struct vmbus_channel *chan = hvs->chan;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 281
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 282 if (hvs_channel_readable(chan))
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 283 sk->sk_data_ready(sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 284
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 285 if (hv_get_bytes_to_write(&chan->outbound) > 0)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 286 sk->sk_write_space(sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 287 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 288
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 289 static void hvs_do_close_lock_held(struct vsock_sock *vsk,
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 290 bool cancel_timeout)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 291 {
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 292 struct sock *sk = sk_vsock(vsk);
b4562ca7925a3be Dexuan Cui 2017-10-19 293
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 294 sock_set_flag(sk, SOCK_DONE);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 295 vsk->peer_shutdown = SHUTDOWN_MASK;
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 296 if (vsock_stream_has_data(vsk) <= 0)
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 297 sk->sk_state = TCP_CLOSING;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 298 sk->sk_state_change(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 299 if (vsk->close_work_scheduled &&
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 300 (!cancel_timeout || cancel_delayed_work(&vsk->close_work))) {
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 301 vsk->close_work_scheduled = false;
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 302 vsock_remove_sock(vsk);
b4562ca7925a3be Dexuan Cui 2017-10-19 303
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 304 /* Release the reference taken while scheduling the timeout */
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 305 sock_put(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 306 }
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 307 }
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 308
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 309 static void hvs_close_connection(struct vmbus_channel *chan)
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 310 {
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 311 struct sock *sk = get_per_channel_state(chan);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 312
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 313 lock_sock(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 314 hvs_do_close_lock_held(vsock_sk(sk), true);
b4562ca7925a3be Dexuan Cui 2017-10-19 315 release_sock(sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 316 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 317
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 318 static void hvs_open_connection(struct vmbus_channel *chan)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 319 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 320 uuid_le *if_instance, *if_type;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 321 unsigned char conn_from_host;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 322
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 323 struct sockaddr_vm addr;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 324 struct sock *sk, *new = NULL;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 325 struct vsock_sock *vnew = NULL;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 326 struct hvsock *hvs = NULL;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 327 struct hvsock *hvs_new = NULL;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 328 int rcvbuf;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 329 int ret;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 330 int sndbuf;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 331
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 332 if_type = &chan->offermsg.offer.if_type;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 333 if_instance = &chan->offermsg.offer.if_instance;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 334 conn_from_host = chan->offermsg.offer.u.pipe.user_def[0];
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 335
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 336 /* The host or the VM should only listen on a port in
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 337 * [0, MAX_LISTEN_PORT]
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 338 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 339 if (!is_valid_srv_id(if_type) ||
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 340 get_port_by_srv_id(if_type) > MAX_LISTEN_PORT)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 341 return;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 342
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 343 hvs_addr_init(&addr, conn_from_host ? if_type : if_instance);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 344 sk = vsock_find_bound_socket(&addr);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 345 if (!sk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 346 return;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 347
b4562ca7925a3be Dexuan Cui 2017-10-19 348 lock_sock(sk);
3b4477d2dcf2709 Stefan Hajnoczi 2017-10-05 349 if ((conn_from_host && sk->sk_state != TCP_LISTEN) ||
3b4477d2dcf2709 Stefan Hajnoczi 2017-10-05 350 (!conn_from_host && sk->sk_state != TCP_SYN_SENT))
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 351 goto out;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 352
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 353 if (conn_from_host) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 354 if (sk->sk_ack_backlog >= sk->sk_max_ack_backlog)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 355 goto out;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 356
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 357 new = __vsock_create(sock_net(sk), NULL, sk, GFP_KERNEL,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 358 sk->sk_type, 0);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 359 if (!new)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 360 goto out;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 361
3b4477d2dcf2709 Stefan Hajnoczi 2017-10-05 362 new->sk_state = TCP_SYN_SENT;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 363 vnew = vsock_sk(new);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 364 hvs_new = vnew->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 365 hvs_new->chan = chan;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 366 } else {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 367 hvs = vsock_sk(sk)->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 368 hvs->chan = chan;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 369 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 370
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 371 set_channel_read_mode(chan, HV_CALL_DIRECT);
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 372
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 373 /* Use the socket buffer sizes as hints for the VMBUS ring size. For
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 374 * server side sockets, 'sk' is the parent socket and thus, this will
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 375 * allow the child sockets to inherit the size from the parent. Keep
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 376 * the mins to the default value and align to page size as per VMBUS
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 377 * requirements.
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 378 * For the max, the socket core library will limit the socket buffer
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 379 * size that can be set by the user, but, since currently, the hv_sock
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 380 * VMBUS ring buffer is physically contiguous allocation, restrict it
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 381 * further.
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 382 * Older versions of hv_sock host side code cannot handle bigger VMBUS
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 383 * ring buffer size. Use the version number to limit the change to newer
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 384 * versions.
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 385 */
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 386 if (vmbus_proto_version < VERSION_WIN10_V5) {
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 387 sndbuf = RINGBUFFER_HVS_SND_SIZE;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 388 rcvbuf = RINGBUFFER_HVS_RCV_SIZE;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 389 } else {
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 @390 sndbuf = max_t(int, sk->sk_sndbuf, RINGBUFFER_HVS_SND_SIZE);
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 391 sndbuf = min_t(int, sndbuf, RINGBUFFER_HVS_MAX_SIZE);
31113cc83e30924 Himadri Pandya 2019-07-25 392 sndbuf = ALIGN(sndbuf, HV_HYP_PAGE_SIZE);
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 393 rcvbuf = max_t(int, sk->sk_rcvbuf, RINGBUFFER_HVS_RCV_SIZE);
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 394 rcvbuf = min_t(int, rcvbuf, RINGBUFFER_HVS_MAX_SIZE);
31113cc83e30924 Himadri Pandya 2019-07-25 395 rcvbuf = ALIGN(rcvbuf, HV_HYP_PAGE_SIZE);
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 396 }
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 397
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 398 ret = vmbus_open(chan, sndbuf, rcvbuf, NULL, 0, hvs_channel_cb,
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 399 conn_from_host ? new : sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 400 if (ret != 0) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 401 if (conn_from_host) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 402 hvs_new->chan = NULL;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 403 sock_put(new);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 404 } else {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 405 hvs->chan = NULL;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 406 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 407 goto out;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 408 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 409
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 410 set_per_channel_state(chan, conn_from_host ? new : sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 411 vmbus_set_chn_rescind_callback(chan, hvs_close_connection);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 412
cb359b60416701c Sunil Muthuswamy 2019-06-17 413 /* Set the pending send size to max packet size to always get
cb359b60416701c Sunil Muthuswamy 2019-06-17 414 * notifications from the host when there is enough writable space.
cb359b60416701c Sunil Muthuswamy 2019-06-17 415 * The host is optimized to send notifications only when the pending
cb359b60416701c Sunil Muthuswamy 2019-06-17 416 * size boundary is crossed, and not always.
cb359b60416701c Sunil Muthuswamy 2019-06-17 417 */
cb359b60416701c Sunil Muthuswamy 2019-06-17 418 hvs_set_channel_pending_send_size(chan);
cb359b60416701c Sunil Muthuswamy 2019-06-17 419
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 420 if (conn_from_host) {
3b4477d2dcf2709 Stefan Hajnoczi 2017-10-05 421 new->sk_state = TCP_ESTABLISHED;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 422 sk->sk_ack_backlog++;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 423
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 424 hvs_addr_init(&vnew->local_addr, if_type);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 425 hvs_remote_addr_init(&vnew->remote_addr, &vnew->local_addr);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 426
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 427 hvs_new->vm_srv_id = *if_type;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 428 hvs_new->host_srv_id = *if_instance;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 429
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 430 vsock_insert_connected(vnew);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 431
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 432 vsock_enqueue_accept(sk, new);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 433 } else {
3b4477d2dcf2709 Stefan Hajnoczi 2017-10-05 434 sk->sk_state = TCP_ESTABLISHED;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 435 sk->sk_socket->state = SS_CONNECTED;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 436
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 437 vsock_insert_connected(vsock_sk(sk));
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 438 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 439
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 440 sk->sk_state_change(sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 441
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 442 out:
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 443 /* Release refcnt obtained when we called vsock_find_bound_socket() */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 444 sock_put(sk);
b4562ca7925a3be Dexuan Cui 2017-10-19 445
b4562ca7925a3be Dexuan Cui 2017-10-19 446 release_sock(sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 447 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 448
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 449 static u32 hvs_get_local_cid(void)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 450 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 451 return VMADDR_CID_ANY;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 452 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 453
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 454 static int hvs_sock_init(struct vsock_sock *vsk, struct vsock_sock *psk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 455 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 456 struct hvsock *hvs;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 457 struct sock *sk = sk_vsock(vsk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 458
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 459 hvs = kzalloc(sizeof(*hvs), GFP_KERNEL);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 460 if (!hvs)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 461 return -ENOMEM;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 462
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 463 vsk->trans = hvs;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 464 hvs->vsk = vsk;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 465 sk->sk_sndbuf = RINGBUFFER_HVS_SND_SIZE;
ac383f58f3c98de Sunil Muthuswamy 2019-05-22 466 sk->sk_rcvbuf = RINGBUFFER_HVS_RCV_SIZE;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 467 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 468 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 469
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 470 static int hvs_connect(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 471 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 472 union hvs_service_id vm, host;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 473 struct hvsock *h = vsk->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 474
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 475 vm.srv_id = srv_id_template;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 476 vm.svm_port = vsk->local_addr.svm_port;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 477 h->vm_srv_id = vm.srv_id;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 478
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 479 host.srv_id = srv_id_template;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 480 host.svm_port = vsk->remote_addr.svm_port;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 481 h->host_srv_id = host.srv_id;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 482
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 483 return vmbus_send_tl_connect_request(&h->vm_srv_id, &h->host_srv_id);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 484 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 485
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 486 static void hvs_shutdown_lock_held(struct hvsock *hvs, int mode)
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 487 {
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 488 struct vmpipe_proto_header hdr;
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 489
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 490 if (hvs->fin_sent || !hvs->chan)
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 491 return;
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 492
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 493 /* It can't fail: see hvs_channel_writable_bytes(). */
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 494 (void)hvs_send_data(hvs->chan, (struct hvs_send_buf *)&hdr, 0);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 495 hvs->fin_sent = true;
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 496 }
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 497
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 498 static int hvs_shutdown(struct vsock_sock *vsk, int mode)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 499 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 500 struct sock *sk = sk_vsock(vsk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 501
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 502 if (!(mode & SEND_SHUTDOWN))
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 503 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 504
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 505 lock_sock(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 506 hvs_shutdown_lock_held(vsk->trans, mode);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 507 release_sock(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 508 return 0;
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 509 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 510
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 511 static void hvs_close_timeout(struct work_struct *work)
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 512 {
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 513 struct vsock_sock *vsk =
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 514 container_of(work, struct vsock_sock, close_work.work);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 515 struct sock *sk = sk_vsock(vsk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 516
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 517 sock_hold(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 518 lock_sock(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 519 if (!sock_flag(sk, SOCK_DONE))
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 520 hvs_do_close_lock_held(vsk, false);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 521
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 522 vsk->close_work_scheduled = false;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 523 release_sock(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 524 sock_put(sk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 525 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 526
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 527 /* Returns true, if it is safe to remove socket; false otherwise */
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 528 static bool hvs_close_lock_held(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 529 {
b4562ca7925a3be Dexuan Cui 2017-10-19 530 struct sock *sk = sk_vsock(vsk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 531
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 532 if (!(sk->sk_state == TCP_ESTABLISHED ||
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 533 sk->sk_state == TCP_CLOSING))
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 534 return true;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 535
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 536 if ((sk->sk_shutdown & SHUTDOWN_MASK) != SHUTDOWN_MASK)
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 537 hvs_shutdown_lock_held(vsk->trans, SHUTDOWN_MASK);
b4562ca7925a3be Dexuan Cui 2017-10-19 538
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 539 if (sock_flag(sk, SOCK_DONE))
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 540 return true;
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 541
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 542 /* This reference will be dropped by the delayed close routine */
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 543 sock_hold(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 544 INIT_DELAYED_WORK(&vsk->close_work, hvs_close_timeout);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 545 vsk->close_work_scheduled = true;
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 546 schedule_delayed_work(&vsk->close_work, HVS_CLOSE_TIMEOUT);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 547 return false;
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 548 }
b4562ca7925a3be Dexuan Cui 2017-10-19 549
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 550 static void hvs_release(struct vsock_sock *vsk)
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 551 {
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 552 struct sock *sk = sk_vsock(vsk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 553 bool remove_sock;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 554
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 555 lock_sock(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 556 remove_sock = hvs_close_lock_held(vsk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 557 release_sock(sk);
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 558 if (remove_sock)
a9eeb998c28d550 Sunil Muthuswamy 2019-05-15 559 vsock_remove_sock(vsk);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 560 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 561
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 562 static void hvs_destruct(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 563 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 564 struct hvsock *hvs = vsk->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 565 struct vmbus_channel *chan = hvs->chan;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 566
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 567 if (chan)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 568 vmbus_hvsock_device_unregister(chan);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 569
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 570 kfree(hvs);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 571 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 572
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 573 static int hvs_dgram_bind(struct vsock_sock *vsk, struct sockaddr_vm *addr)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 574 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 575 return -EOPNOTSUPP;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 576 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 577
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 578 static int hvs_dgram_dequeue(struct vsock_sock *vsk, struct msghdr *msg,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 579 size_t len, int flags)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 580 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 581 return -EOPNOTSUPP;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 582 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 583
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 584 static int hvs_dgram_enqueue(struct vsock_sock *vsk,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 585 struct sockaddr_vm *remote, struct msghdr *msg,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 586 size_t dgram_len)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 587 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 588 return -EOPNOTSUPP;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 589 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 590
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 591 static bool hvs_dgram_allow(u32 cid, u32 port)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 592 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 593 return false;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 594 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 595
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 596 static int hvs_update_recv_data(struct hvsock *hvs)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 597 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 598 struct hvs_recv_buf *recv_buf;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 599 u32 payload_len;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 600
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 601 recv_buf = (struct hvs_recv_buf *)(hvs->recv_desc + 1);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 602 payload_len = recv_buf->hdr.data_size;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 603
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 604 if (payload_len > HVS_MTU_SIZE)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 605 return -EIO;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 606
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 607 if (payload_len == 0)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 608 hvs->vsk->peer_shutdown |= SEND_SHUTDOWN;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 609
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 610 hvs->recv_data_len = payload_len;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 611 hvs->recv_data_off = 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 612
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 613 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 614 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 615
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 616 static ssize_t hvs_stream_dequeue(struct vsock_sock *vsk, struct msghdr *msg,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 617 size_t len, int flags)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 618 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 619 struct hvsock *hvs = vsk->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 620 bool need_refill = !hvs->recv_desc;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 621 struct hvs_recv_buf *recv_buf;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 622 u32 to_read;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 623 int ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 624
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 625 if (flags & MSG_PEEK)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 626 return -EOPNOTSUPP;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 627
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 628 if (need_refill) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 629 hvs->recv_desc = hv_pkt_iter_first(hvs->chan);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 630 ret = hvs_update_recv_data(hvs);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 631 if (ret)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 632 return ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 633 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 634
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 635 recv_buf = (struct hvs_recv_buf *)(hvs->recv_desc + 1);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 636 to_read = min_t(u32, len, hvs->recv_data_len);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 637 ret = memcpy_to_msg(msg, recv_buf->data + hvs->recv_data_off, to_read);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 638 if (ret != 0)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 639 return ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 640
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 641 hvs->recv_data_len -= to_read;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 642 if (hvs->recv_data_len == 0) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 643 hvs->recv_desc = hv_pkt_iter_next(hvs->chan, hvs->recv_desc);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 644 if (hvs->recv_desc) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 645 ret = hvs_update_recv_data(hvs);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 646 if (ret)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 647 return ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 648 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 649 } else {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 650 hvs->recv_data_off += to_read;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 651 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 652
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 653 return to_read;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 654 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 655
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 656 static ssize_t hvs_stream_enqueue(struct vsock_sock *vsk, struct msghdr *msg,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 657 size_t len)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 658 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 659 struct hvsock *hvs = vsk->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 660 struct vmbus_channel *chan = hvs->chan;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 661 struct hvs_send_buf *send_buf;
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 662 ssize_t to_write, max_writable;
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 663 ssize_t ret = 0;
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 664 ssize_t bytes_written = 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 665
31113cc83e30924 Himadri Pandya 2019-07-25 666 BUILD_BUG_ON(sizeof(*send_buf) != HV_HYP_PAGE_SIZE);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 667
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 668 send_buf = kmalloc(sizeof(*send_buf), GFP_KERNEL);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 669 if (!send_buf)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 670 return -ENOMEM;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 671
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 672 /* Reader(s) could be draining data from the channel as we write.
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 673 * Maximize bandwidth, by iterating until the channel is found to be
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 674 * full.
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 675 */
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 676 while (len) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 677 max_writable = hvs_channel_writable_bytes(chan);
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 678 if (!max_writable)
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 679 break;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 680 to_write = min_t(ssize_t, len, max_writable);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 681 to_write = min_t(ssize_t, to_write, HVS_SEND_BUF_SIZE);
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 682 /* memcpy_from_msg is safe for loop as it advances the offsets
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 683 * within the message iterator.
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 684 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 685 ret = memcpy_from_msg(send_buf->data, msg, to_write);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 686 if (ret < 0)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 687 goto out;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 688
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 689 ret = hvs_send_data(hvs->chan, send_buf, to_write);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 690 if (ret < 0)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 691 goto out;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 692
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 693 bytes_written += to_write;
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 694 len -= to_write;
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 695 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 696 out:
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 697 /* If any data has been sent, return that */
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 698 if (bytes_written)
14a1eaa8820e8f3 Sunil Muthuswamy 2019-05-22 699 ret = bytes_written;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 700 kfree(send_buf);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 701 return ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 702 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 703
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 704 static s64 hvs_stream_has_data(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 705 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 706 struct hvsock *hvs = vsk->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 707 s64 ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 708
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 709 if (hvs->recv_data_len > 0)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 710 return 1;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 711
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 712 switch (hvs_channel_readable_payload(hvs->chan)) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 713 case 1:
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 714 ret = 1;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 715 break;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 716 case 0:
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 717 vsk->peer_shutdown |= SEND_SHUTDOWN;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 718 ret = 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 719 break;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 720 default: /* -1 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 721 ret = 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 722 break;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 723 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 724
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 725 return ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 726 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 727
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 728 static s64 hvs_stream_has_space(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 729 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 730 struct hvsock *hvs = vsk->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 731
cb359b60416701c Sunil Muthuswamy 2019-06-17 732 return hvs_channel_writable_bytes(hvs->chan);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 733 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 734
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 735 static u64 hvs_stream_rcvhiwat(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 736 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 737 return HVS_MTU_SIZE + 1;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 738 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 739
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 740 static bool hvs_stream_is_active(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 741 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 742 struct hvsock *hvs = vsk->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 743
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 744 return hvs->chan != NULL;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 745 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 746
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 747 static bool hvs_stream_allow(u32 cid, u32 port)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 748 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 749 /* The host's port range [MIN_HOST_EPHEMERAL_PORT, 0xFFFFFFFF) is
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 750 * reserved as ephemeral ports, which are used as the host's ports
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 751 * when the host initiates connections.
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 752 *
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 753 * Perform this check in the guest so an immediate error is produced
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 754 * instead of a timeout.
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 755 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 756 if (port > MAX_HOST_LISTEN_PORT)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 757 return false;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 758
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 759 if (cid == VMADDR_CID_HOST)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 760 return true;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 761
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 762 return false;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 763 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 764
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 765 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 766 int hvs_notify_poll_in(struct vsock_sock *vsk, size_t target, bool *readable)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 767 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 768 struct hvsock *hvs = vsk->trans;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 769
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 770 *readable = hvs_channel_readable(hvs->chan);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 771 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 772 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 773
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 774 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 775 int hvs_notify_poll_out(struct vsock_sock *vsk, size_t target, bool *writable)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 776 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 777 *writable = hvs_stream_has_space(vsk) > 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 778
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 779 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 780 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 781
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 782 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 783 int hvs_notify_recv_init(struct vsock_sock *vsk, size_t target,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 784 struct vsock_transport_recv_notify_data *d)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 785 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 786 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 787 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 788
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 789 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 790 int hvs_notify_recv_pre_block(struct vsock_sock *vsk, size_t target,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 791 struct vsock_transport_recv_notify_data *d)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 792 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 793 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 794 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 795
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 796 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 797 int hvs_notify_recv_pre_dequeue(struct vsock_sock *vsk, size_t target,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 798 struct vsock_transport_recv_notify_data *d)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 799 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 800 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 801 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 802
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 803 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 804 int hvs_notify_recv_post_dequeue(struct vsock_sock *vsk, size_t target,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 805 ssize_t copied, bool data_read,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 806 struct vsock_transport_recv_notify_data *d)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 807 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 808 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 809 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 810
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 811 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 812 int hvs_notify_send_init(struct vsock_sock *vsk,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 813 struct vsock_transport_send_notify_data *d)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 814 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 815 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 816 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 817
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 818 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 819 int hvs_notify_send_pre_block(struct vsock_sock *vsk,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 820 struct vsock_transport_send_notify_data *d)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 821 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 822 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 823 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 824
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 825 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 826 int hvs_notify_send_pre_enqueue(struct vsock_sock *vsk,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 827 struct vsock_transport_send_notify_data *d)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 828 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 829 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 830 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 831
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 832 static
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 833 int hvs_notify_send_post_enqueue(struct vsock_sock *vsk, ssize_t written,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 834 struct vsock_transport_send_notify_data *d)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 835 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 836 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 837 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 838
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 839 static void hvs_set_buffer_size(struct vsock_sock *vsk, u64 val)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 840 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 841 /* Ignored. */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 842 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 843
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 844 static void hvs_set_min_buffer_size(struct vsock_sock *vsk, u64 val)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 845 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 846 /* Ignored. */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 847 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 848
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 849 static void hvs_set_max_buffer_size(struct vsock_sock *vsk, u64 val)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 850 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 851 /* Ignored. */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 852 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 853
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 854 static u64 hvs_get_buffer_size(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 855 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 856 return -ENOPROTOOPT;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 857 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 858
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 859 static u64 hvs_get_min_buffer_size(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 860 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 861 return -ENOPROTOOPT;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 862 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 863
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 864 static u64 hvs_get_max_buffer_size(struct vsock_sock *vsk)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 865 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 866 return -ENOPROTOOPT;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 867 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 868
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 869 static struct vsock_transport hvs_transport = {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 870 .get_local_cid = hvs_get_local_cid,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 871
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 872 .init = hvs_sock_init,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 873 .destruct = hvs_destruct,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 874 .release = hvs_release,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 875 .connect = hvs_connect,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 876 .shutdown = hvs_shutdown,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 877
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 878 .dgram_bind = hvs_dgram_bind,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 879 .dgram_dequeue = hvs_dgram_dequeue,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 880 .dgram_enqueue = hvs_dgram_enqueue,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 881 .dgram_allow = hvs_dgram_allow,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 882
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 883 .stream_dequeue = hvs_stream_dequeue,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 884 .stream_enqueue = hvs_stream_enqueue,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 885 .stream_has_data = hvs_stream_has_data,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 886 .stream_has_space = hvs_stream_has_space,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 887 .stream_rcvhiwat = hvs_stream_rcvhiwat,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 888 .stream_is_active = hvs_stream_is_active,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 889 .stream_allow = hvs_stream_allow,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 890
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 891 .notify_poll_in = hvs_notify_poll_in,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 892 .notify_poll_out = hvs_notify_poll_out,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 893 .notify_recv_init = hvs_notify_recv_init,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 894 .notify_recv_pre_block = hvs_notify_recv_pre_block,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 895 .notify_recv_pre_dequeue = hvs_notify_recv_pre_dequeue,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 896 .notify_recv_post_dequeue = hvs_notify_recv_post_dequeue,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 897 .notify_send_init = hvs_notify_send_init,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 898 .notify_send_pre_block = hvs_notify_send_pre_block,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 899 .notify_send_pre_enqueue = hvs_notify_send_pre_enqueue,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 900 .notify_send_post_enqueue = hvs_notify_send_post_enqueue,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 901
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 902 .set_buffer_size = hvs_set_buffer_size,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 903 .set_min_buffer_size = hvs_set_min_buffer_size,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 904 .set_max_buffer_size = hvs_set_max_buffer_size,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 905 .get_buffer_size = hvs_get_buffer_size,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 906 .get_min_buffer_size = hvs_get_min_buffer_size,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 907 .get_max_buffer_size = hvs_get_max_buffer_size,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 908 };
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 909
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 910 static int hvs_probe(struct hv_device *hdev,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 911 const struct hv_vmbus_device_id *dev_id)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 912 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 913 struct vmbus_channel *chan = hdev->channel;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 914
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 915 hvs_open_connection(chan);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 916
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 917 /* Always return success to suppress the unnecessary error message
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 918 * in vmbus_probe(): on error the host will rescind the device in
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 919 * 30 seconds and we can do cleanup at that time in
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 920 * vmbus_onoffer_rescind().
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 921 */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 922 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 923 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 924
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 925 static int hvs_remove(struct hv_device *hdev)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 926 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 927 struct vmbus_channel *chan = hdev->channel;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 928
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 929 vmbus_close(chan);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 930
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 931 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 932 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 933
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 934 /* This isn't really used. See vmbus_match() and vmbus_probe() */
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 935 static const struct hv_vmbus_device_id id_table[] = {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 936 {},
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 937 };
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 938
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 939 static struct hv_driver hvs_drv = {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 940 .name = "hv_sock",
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 941 .hvsock = true,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 942 .id_table = id_table,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 943 .probe = hvs_probe,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 944 .remove = hvs_remove,
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 945 };
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 946
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 947 static int __init hvs_init(void)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 948 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 949 int ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 950
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 951 if (vmbus_proto_version < VERSION_WIN10)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 952 return -ENODEV;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 953
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 954 ret = vmbus_driver_register(&hvs_drv);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 955 if (ret != 0)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 956 return ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 957
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 958 ret = vsock_core_init(&hvs_transport);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 959 if (ret) {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 960 vmbus_driver_unregister(&hvs_drv);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 961 return ret;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 962 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 963
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 964 return 0;
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 965 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 966
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 967 static void __exit hvs_exit(void)
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 968 {
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 969 vsock_core_exit();
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 970 vmbus_driver_unregister(&hvs_drv);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 971 }
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 972
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 973 module_init(hvs_init);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 974 module_exit(hvs_exit);
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 975
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 976 MODULE_DESCRIPTION("Hyper-V Sockets");
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 977 MODULE_VERSION("1.0.0");
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 978 MODULE_LICENSE("GPL");
ae0078fcf0a5eb3 Dexuan Cui 2017-08-26 979 MODULE_ALIAS_NETPROTO(PF_VSOCK);

:::::: The code at line 214 was first introduced by commit
:::::: ae0078fcf0a5eb3a8623bfb5f988262e0911fdb9 hv_sock: implements Hyper-V transport for Virtual Sockets (AF_VSOCK)

:::::: TO: Dexuan Cui <decui@microsoft.com>
:::::: CC: David S. Miller <davem@davemloft.net>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

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