FD.io VPP  v19.04.2-12-g66b1689
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  features &= ~disabled_features;
69 
70  rv = vhost_user_create_if (vnm, vm, (char *) mp->sock_filename,
71  mp->is_server, &sw_if_index, features,
72  mp->renumber, ntohl (mp->custom_dev_instance),
73  (mp->use_custom_mac) ? mp->mac_address : NULL);
74 
75  /* Remember an interface tag for the new interface */
76  if (rv == 0)
77  {
78  /* If a tag was supplied... */
79  if (mp->tag[0])
80  {
81  /* Make sure it's a proper C-string */
82  mp->tag[ARRAY_LEN (mp->tag) - 1] = 0;
83  u8 *tag = format (0, "%s%c", mp->tag, 0);
84  vnet_set_sw_interface_tag (vnm, tag, sw_if_index);
85  }
86  }
87 
88  /* *INDENT-OFF* */
89  REPLY_MACRO2(VL_API_CREATE_VHOST_USER_IF_REPLY,
90  ({
91  rmp->sw_if_index = ntohl (sw_if_index);
92  }));
93  /* *INDENT-ON* */
94 }
95 
96 static void
98 {
99  int rv = 0;
100  vl_api_modify_vhost_user_if_reply_t *rmp;
101  u32 sw_if_index = ntohl (mp->sw_if_index);
102 
103  vnet_main_t *vnm = vnet_get_main ();
105 
106  rv = vhost_user_modify_if (vnm, vm, (char *) mp->sock_filename,
107  mp->is_server, sw_if_index, (u64) ~ 0,
108  mp->renumber, ntohl (mp->custom_dev_instance));
109 
110  REPLY_MACRO (VL_API_MODIFY_VHOST_USER_IF_REPLY);
111 }
112 
113 static void
115 {
116  int rv = 0;
117  vl_api_delete_vhost_user_if_reply_t *rmp;
118  u32 sw_if_index = ntohl (mp->sw_if_index);
120 
121  vnet_main_t *vnm = vnet_get_main ();
123 
124  rv = vhost_user_delete_if (vnm, vm, sw_if_index);
125 
126  REPLY_MACRO (VL_API_DELETE_VHOST_USER_IF_REPLY);
127  if (!rv)
128  {
130  if (!reg)
131  return;
132 
133  vnet_clear_sw_interface_tag (vnm, sw_if_index);
134  }
135 }
136 
137 static void
139  vl_api_registration_t * reg,
141  u32 context)
142 {
144 
145  mp = vl_msg_api_alloc (sizeof (*mp));
146  clib_memset (mp, 0, sizeof (*mp));
147  mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_VHOST_USER_DETAILS);
148  mp->sw_if_index = ntohl (vui->sw_if_index);
149  mp->virtio_net_hdr_sz = ntohl (vui->virtio_net_hdr_sz);
150  mp->features = clib_net_to_host_u64 (vui->features);
151  mp->is_server = vui->is_server;
152  mp->num_regions = ntohl (vui->num_regions);
153  mp->sock_errno = ntohl (vui->sock_errno);
154  mp->context = context;
155 
156  strncpy ((char *) mp->sock_filename,
157  (char *) vui->sock_filename, ARRAY_LEN (mp->sock_filename) - 1);
158  strncpy ((char *) mp->interface_name,
159  (char *) vui->if_name, ARRAY_LEN (mp->interface_name) - 1);
160 
161  vl_api_send_msg (reg, (u8 *) mp);
162 }
163 
164 static void
167 {
168  int rv = 0;
170  vnet_main_t *vnm = vnet_get_main ();
175 
177  if (!reg)
178  return;
179 
180  rv = vhost_user_dump_ifs (vnm, vm, &ifaces);
181  if (rv)
182  return;
183 
184  vec_foreach (vuid, ifaces)
185  {
186  send_sw_interface_vhost_user_details (am, reg, vuid, mp->context);
187  }
188  vec_free (ifaces);
189 }
190 
191 /*
192  * vhost-user_api_hookup
193  * Add vpe's API message handlers to the table.
194  * vlib has already mapped shared memory and
195  * added the client registration handlers.
196  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
197  */
198 #define vl_msg_name_crc_list
199 #include <vnet/vnet_all_api_h.h>
200 #undef vl_msg_name_crc_list
201 
202 static void
204 {
205 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
206  foreach_vl_msg_name_crc_vhost_user;
207 #undef _
208 }
209 
210 static clib_error_t *
212 {
213  api_main_t *am = &api_main;
214 
215 #define _(N,n) \
216  vl_msg_api_set_handlers(VL_API_##N, #n, \
217  vl_api_##n##_t_handler, \
218  vl_noop_handler, \
219  vl_api_##n##_t_endian, \
220  vl_api_##n##_t_print, \
221  sizeof(vl_api_##n##_t), 1);
223 #undef _
224 
225  /* Mark CREATE_VHOST_USER_IF as mp safe */
226  am->is_mp_safe[VL_API_CREATE_VHOST_USER_IF] = 1;
227 
228  /*
229  * Set up the (msg_name, crc, message-id) table
230  */
232 
233  return 0;
234 }
235 
237 
238 /*
239  * fd.io coding-style-patch-verification: ON
240  *
241  * Local Variables:
242  * eval: (c-set-style "gnu")
243  * End:
244  */
u32 sw_if_index
Definition: ipsec_gre.api:37
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:47
Vhost-user interface details structure (fix this)
Definition: vhost_user.api:89
unsigned long u64
Definition: types.h:89
#define REPLY_MACRO2(t, body)
#define NULL
Definition: clib.h:58
static void vl_api_send_msg(vl_api_registration_t *rp, u8 *elem)
Definition: api.h:34
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)
clib_memset(h->entries, 0, sizeof(h->entries[0])*entries)
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
vhost-user interface create request
Definition: vhost_user.api:27
void * vl_msg_api_alloc(int nbytes)
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)
Definition: vhost_user.c:1547
unsigned char u8
Definition: types.h:56
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)
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)
Definition: vhost_user.c:1484
#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:1267
vhost-user interface create response
Definition: vhost_user.api:47
#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:1712
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:202
An API client registration, only in vpp/vlib.
Definition: api_common.h:45
vlib_main_t * vm
Definition: buffer.c:312
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
u32 context
Definition: ipsec_gre.api:33
#define ARRAY_LEN(x)
Definition: clib.h:62
static vl_api_registration_t * vl_api_client_index_to_registration(u32 index)
Definition: api.h:56
vhost-user interface modify request
Definition: vhost_user.api:59
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
u8 * is_mp_safe
Message is mp safe vector.
Definition: api_common.h:225
#define vec_foreach(var, vec)
Vector iterator.
vhost-user interface delete request
Definition: vhost_user.api:73
vpe_api_main_t vpe_api_main
Definition: interface_api.c:49
api_main_t api_main
Definition: api_shared.c:35
static void vl_api_sw_interface_vhost_user_dump_t_handler(vl_api_sw_interface_vhost_user_dump_t *mp)