FD.io VPP  v19.08.3-2-gbabecb413
Vector Packet Processing
vhost_user_api.c
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1 /*
2  *------------------------------------------------------------------
3  * vhost-user_api.c - vhost-user api
4  *
5  * Copyright (c) 2016 Cisco and/or its affiliates.
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  *------------------------------------------------------------------
18  */
19 
20 #include <vnet/vnet.h>
21 #include <vlibmemory/api.h>
22 
23 #include <vnet/interface.h>
24 #include <vnet/api_errno.h>
26 
27 #include <vnet/vnet_msg_enum.h>
28 
29 #define vl_typedefs /* define message structures */
30 #include <vnet/vnet_all_api_h.h>
31 #undef vl_typedefs
32 
33 #define vl_endianfun /* define message structures */
34 #include <vnet/vnet_all_api_h.h>
35 #undef vl_endianfun
36 
37 /* instantiate all the print functions we know about */
38 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
39 #define vl_printfun
40 #include <vnet/vnet_all_api_h.h>
41 #undef vl_printfun
42 
44 
45 #define foreach_vpe_api_msg \
46 _(CREATE_VHOST_USER_IF, create_vhost_user_if) \
47 _(MODIFY_VHOST_USER_IF, modify_vhost_user_if) \
48 _(DELETE_VHOST_USER_IF, delete_vhost_user_if) \
49 _(SW_INTERFACE_VHOST_USER_DUMP, sw_interface_vhost_user_dump)
50 
51 static void
53 {
54  int rv = 0;
56  u32 sw_if_index = (u32) ~ 0;
57  vnet_main_t *vnm = vnet_get_main ();
59  u64 features = (u64) ~ (0ULL);
60  u64 disabled_features = (u64) (0ULL);
61 
62  if (mp->disable_mrg_rxbuf)
63  disabled_features = (1ULL << FEAT_VIRTIO_NET_F_MRG_RXBUF);
64 
65  if (mp->disable_indirect_desc)
66  disabled_features |= (1ULL << FEAT_VIRTIO_F_INDIRECT_DESC);
67 
68  /*
69  * feature mask is not supported via binary API. We disable GSO feature in the
70  * feature mask. It may be enabled via enable_gso argument.
71  */
73  features &= ~disabled_features;
74 
75  rv = vhost_user_create_if (vnm, vm, (char *) mp->sock_filename,
76  mp->is_server, &sw_if_index, features,
77  mp->renumber, ntohl (mp->custom_dev_instance),
78  (mp->use_custom_mac) ? mp->mac_address : NULL,
79  mp->enable_gso);
80 
81  /* Remember an interface tag for the new interface */
82  if (rv == 0)
83  {
84  /* If a tag was supplied... */
85  if (mp->tag[0])
86  {
87  /* Make sure it's a proper C-string */
88  mp->tag[ARRAY_LEN (mp->tag) - 1] = 0;
89  u8 *tag = format (0, "%s%c", mp->tag, 0);
90  vnet_set_sw_interface_tag (vnm, tag, sw_if_index);
91  }
92  }
93 
94  /* *INDENT-OFF* */
95  REPLY_MACRO2(VL_API_CREATE_VHOST_USER_IF_REPLY,
96  ({
97  rmp->sw_if_index = ntohl (sw_if_index);
98  }));
99  /* *INDENT-ON* */
100 }
101 
102 static void
104 {
105  int rv = 0;
106  vl_api_modify_vhost_user_if_reply_t *rmp;
107  u32 sw_if_index = ntohl (mp->sw_if_index);
108  u64 features = (u64) ~ (0ULL);
109  u64 disabled_features = (u64) (0ULL);
110 
111  vnet_main_t *vnm = vnet_get_main ();
113 
114  /*
115  * feature mask is not supported via binary API. We disable GSO feature in the
116  * feature mask. It may be enabled via enable_gso argument.
117  */
119  features &= ~disabled_features;
120 
121  rv = vhost_user_modify_if (vnm, vm, (char *) mp->sock_filename,
122  mp->is_server, sw_if_index, features,
123  mp->renumber, ntohl (mp->custom_dev_instance),
124  mp->enable_gso);
125 
126  REPLY_MACRO (VL_API_MODIFY_VHOST_USER_IF_REPLY);
127 }
128 
129 static void
131 {
132  int rv = 0;
133  vl_api_delete_vhost_user_if_reply_t *rmp;
134  u32 sw_if_index = ntohl (mp->sw_if_index);
136 
137  vnet_main_t *vnm = vnet_get_main ();
139 
140  rv = vhost_user_delete_if (vnm, vm, sw_if_index);
141 
142  REPLY_MACRO (VL_API_DELETE_VHOST_USER_IF_REPLY);
143  if (!rv)
144  {
146  if (!reg)
147  return;
148 
149  vnet_clear_sw_interface_tag (vnm, sw_if_index);
150  }
151 }
152 
153 static void
155  vl_api_registration_t * reg,
157  u32 context)
158 {
160 
161  mp = vl_msg_api_alloc (sizeof (*mp));
162  clib_memset (mp, 0, sizeof (*mp));
163  mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_VHOST_USER_DETAILS);
164  mp->sw_if_index = ntohl (vui->sw_if_index);
165  mp->virtio_net_hdr_sz = ntohl (vui->virtio_net_hdr_sz);
166  mp->features = clib_net_to_host_u64 (vui->features);
167  mp->is_server = vui->is_server;
168  mp->num_regions = ntohl (vui->num_regions);
169  mp->sock_errno = ntohl (vui->sock_errno);
170  mp->context = context;
171 
172  strncpy ((char *) mp->sock_filename,
173  (char *) vui->sock_filename, ARRAY_LEN (mp->sock_filename) - 1);
174  strncpy ((char *) mp->interface_name,
175  (char *) vui->if_name, ARRAY_LEN (mp->interface_name) - 1);
176 
177  vl_api_send_msg (reg, (u8 *) mp);
178 }
179 
180 static void
183 {
184  int rv = 0;
186  vnet_main_t *vnm = vnet_get_main ();
188  vhost_user_intf_details_t *ifaces = NULL;
189  vhost_user_intf_details_t *vuid = NULL;
191 
193  if (!reg)
194  return;
195 
196  rv = vhost_user_dump_ifs (vnm, vm, &ifaces);
197  if (rv)
198  return;
199 
200  vec_foreach (vuid, ifaces)
201  {
202  send_sw_interface_vhost_user_details (am, reg, vuid, mp->context);
203  }
204  vec_free (ifaces);
205 }
206 
207 /*
208  * vhost-user_api_hookup
209  * Add vpe's API message handlers to the table.
210  * vlib has already mapped shared memory and
211  * added the client registration handlers.
212  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
213  */
214 #define vl_msg_name_crc_list
215 #include <vnet/vnet_all_api_h.h>
216 #undef vl_msg_name_crc_list
217 
218 static void
220 {
221 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
222  foreach_vl_msg_name_crc_vhost_user;
223 #undef _
224 }
225 
226 static clib_error_t *
228 {
229  api_main_t *am = &api_main;
230 
231 #define _(N,n) \
232  vl_msg_api_set_handlers(VL_API_##N, #n, \
233  vl_api_##n##_t_handler, \
234  vl_noop_handler, \
235  vl_api_##n##_t_endian, \
236  vl_api_##n##_t_print, \
237  sizeof(vl_api_##n##_t), 1);
239 #undef _
240 
241  /* Mark CREATE_VHOST_USER_IF as mp safe */
242  am->is_mp_safe[VL_API_CREATE_VHOST_USER_IF] = 1;
243 
244  /*
245  * Set up the (msg_name, crc, message-id) table
246  */
248 
249  return 0;
250 }
251 
253 
254 /*
255  * fd.io coding-style-patch-verification: ON
256  *
257  * Local Variables:
258  * eval: (c-set-style "gnu")
259  * End:
260  */
static clib_error_t * vhost_user_api_hookup(vlib_main_t *vm)
VLIB_API_INIT_FUNCTION(vhost_user_api_hookup)
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
Vhost-user interface details structure (fix this)
Definition: vhost_user.api:93
unsigned long u64
Definition: types.h:89
#define REPLY_MACRO2(t, body)
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
static void vl_api_send_msg(vl_api_registration_t *rp, u8 *elem)
Definition: api.h:35
static void vl_api_delete_vhost_user_if_t_handler(vl_api_delete_vhost_user_if_t *mp)
static void vnet_clear_sw_interface_tag(vnet_main_t *vnm, u32 sw_if_index)
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
vhost-user interface create request
Definition: vhost_user.api:28
int vhost_user_create_if(vnet_main_t *vnm, vlib_main_t *vm, const char *sock_filename, u8 is_server, u32 *sw_if_index, u64 feature_mask, u8 renumber, u32 custom_dev_instance, u8 *hwaddr, u8 enable_gso)
Definition: vhost_user.c:1516
void * vl_msg_api_alloc(int nbytes)
unsigned char u8
Definition: types.h:56
vl_api_interface_index_t sw_if_index
Definition: gre.api:50
static void vl_api_modify_vhost_user_if_t_handler(vl_api_modify_vhost_user_if_t *mp)
unsigned int u32
Definition: types.h:88
static void vl_api_create_vhost_user_if_t_handler(vl_api_create_vhost_user_if_t *mp)
#define foreach_vpe_api_msg
int vhost_user_delete_if(vnet_main_t *vnm, vlib_main_t *vm, u32 sw_if_index)
Definition: vhost_user.c:1282
vhost-user interface create response
Definition: vhost_user.api:49
#define REPLY_MACRO(t)
int vhost_user_dump_ifs(vnet_main_t *vnm, vlib_main_t *vm, vhost_user_intf_details_t **out_vuids)
Definition: vhost_user.c:1752
static void setup_message_id_table(api_main_t *am)
API main structure, used by both vpp and binary API clients.
Definition: api_common.h:203
An API client registration, only in vpp/vlib.
Definition: api_common.h:46
vlib_main_t * vm
Definition: buffer.c:323
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
#define ARRAY_LEN(x)
Definition: clib.h:63
static vl_api_registration_t * vl_api_client_index_to_registration(u32 index)
Definition: api.h:57
vhost-user interface modify request
Definition: vhost_user.api:62
static void vnet_set_sw_interface_tag(vnet_main_t *vnm, u8 *tag, u32 sw_if_index)
static void send_sw_interface_vhost_user_details(vpe_api_main_t *am, vl_api_registration_t *reg, vhost_user_intf_details_t *vui, u32 context)
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
int vhost_user_modify_if(vnet_main_t *vnm, vlib_main_t *vm, const char *sock_filename, u8 is_server, u32 sw_if_index, u64 feature_mask, u8 renumber, u32 custom_dev_instance, u8 enable_gso)
Definition: vhost_user.c:1580
u8 * is_mp_safe
Message is mp safe vector.
Definition: api_common.h:226
#define vec_foreach(var, vec)
Vector iterator.
vhost-user interface delete request
Definition: vhost_user.api:77
vpe_api_main_t vpe_api_main
Definition: interface_api.c:49
u32 context
Definition: gre.api:45
api_main_t api_main
Definition: api_shared.c:35
#define FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS
Definition: vhost_user.h:125
static void vl_api_sw_interface_vhost_user_dump_t_handler(vl_api_sw_interface_vhost_user_dump_t *mp)