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@xxxxxxxxx> 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@xxxxxxxxxxxxx> :::::: CC: David S. Miller <davem@xxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
