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gerrit.nordix.org / fdio / vpp / 8e66b9bf4ba90279631e6a0e8ccc2eab5f9156c2 / . / src / vlibmemory / memory_vlib.c
blob: 1c099ed0a3e0017157312f076e2f5208c07d30d0 [file] [log] [blame]
/*
*------------------------------------------------------------------
* memory_vlib.c
*
* Copyright (c) 2009 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*------------------------------------------------------------------
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <pthread.h>
#include <vppinfra/vec.h>
#include <vppinfra/hash.h>
#include <vppinfra/pool.h>
#include <vppinfra/format.h>
#include <vppinfra/byte_order.h>
#include <vppinfra/elog.h>
#include <stdarg.h>
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vlibapi/api.h>
#include <vlibmemory/api.h>
/**
* @file
* @brief Binary API messaging via shared memory
* Low-level, primary provisioning interface
*/
/*? %%clicmd:group_label Binary API CLI %% ?*/
/*? %%syscfg:group_label Binary API configuration %% ?*/
#define TRACE_VLIB_MEMORY_QUEUE 0
#include <vlibmemory/vl_memory_msg_enum.h> /* enumerate all vlib messages */
#define vl_typedefs /* define message structures */
#include <vlibmemory/vl_memory_api_h.h>
#undef vl_typedefs
/* instantiate all the print functions we know about */
#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
#define vl_printfun
#include <vlibmemory/vl_memory_api_h.h>
#undef vl_printfun
static inline void *
vl_api_memclnt_create_t_print (vl_api_memclnt_create_t * a, void *handle)
{
vl_print (handle, "vl_api_memclnt_create_t:\n");
vl_print (handle, "name: %s\n", a->name);
vl_print (handle, "input_queue: 0x%wx\n", a->input_queue);
vl_print (handle, "context: %u\n", (unsigned) a->context);
vl_print (handle, "ctx_quota: %ld\n", (long) a->ctx_quota);
return handle;
}
static inline void *
vl_api_memclnt_delete_t_print (vl_api_memclnt_delete_t * a, void *handle)
{
vl_print (handle, "vl_api_memclnt_delete_t:\n");
vl_print (handle, "index: %u\n", (unsigned) a->index);
vl_print (handle, "handle: 0x%wx\n", a->handle);
return handle;
}
static inline void *
vl_api_trace_plugin_msg_ids_t_print (vl_api_trace_plugin_msg_ids_t * a,
void *handle)
{
vl_print (handle, "vl_api_trace_plugin_msg_ids: %s first %u last %u\n",
a->plugin_name,
clib_host_to_net_u16 (a->first_msg_id),
clib_host_to_net_u16 (a->last_msg_id));
return handle;
}
/* instantiate all the endian swap functions we know about */
#define vl_endianfun
#include <vlibmemory/vl_memory_api_h.h>
#undef vl_endianfun
extern void vl_socket_api_send (vl_api_registration_t * rp, u8 * elem);
void
vl_msg_api_send (vl_api_registration_t * rp, u8 * elem)
{
if (PREDICT_FALSE (rp->registration_type > REGISTRATION_TYPE_SHMEM))
{
vl_socket_api_send (rp, elem);
}
else
{
vl_msg_api_send_shmem (rp->vl_input_queue, (u8 *) & elem);
}
}
u8 *
vl_api_serialize_message_table (api_main_t * am, u8 * vector)
{
serialize_main_t _sm, *sm = &_sm;
hash_pair_t *hp;
u32 nmsg = hash_elts (am->msg_index_by_name_and_crc);
serialize_open_vector (sm, vector);
/* serialize the count */
serialize_integer (sm, nmsg, sizeof (u32));
/* *INDENT-OFF* */
hash_foreach_pair (hp, am->msg_index_by_name_and_crc,
({
serialize_likely_small_unsigned_integer (sm, hp->value[0]);
serialize_cstring (sm, (char *) hp->key);
}));
/* *INDENT-ON* */
return serialize_close_vector (sm);
}
/*
* vl_api_memclnt_create_internal
*/
u32
vl_api_memclnt_create_internal (char *name, unix_shared_memory_queue_t * q)
{
vl_api_registration_t **regpp;
vl_api_registration_t *regp;
svm_region_t *svm;
void *oldheap;
api_main_t *am = &api_main;
ASSERT (vlib_get_thread_index () == 0);
pool_get (am->vl_clients, regpp);
svm = am->vlib_rp;
pthread_mutex_lock (&svm->mutex);
oldheap = svm_push_data_heap (svm);
*regpp = clib_mem_alloc (sizeof (vl_api_registration_t));
regp = *regpp;
memset (regp, 0, sizeof (*regp));
regp->registration_type = REGISTRATION_TYPE_SHMEM;
regp->vl_api_registration_pool_index = regpp - am->vl_clients;
regp->vlib_rp = svm;
regp->shmem_hdr = am->shmem_hdr;
regp->vl_input_queue = q;
regp->name = format (0, "%s%c", name, 0);
pthread_mutex_unlock (&svm->mutex);
svm_pop_heap (oldheap);
return vl_msg_api_handle_from_index_and_epoch
(regp->vl_api_registration_pool_index,
am->shmem_hdr->application_restarts);
}
/*
* vl_api_memclnt_create_t_handler
*/
void
vl_api_memclnt_create_t_handler (vl_api_memclnt_create_t * mp)
{
vl_api_registration_t **regpp;
vl_api_registration_t *regp;
vl_api_memclnt_create_reply_t *rp;
svm_region_t *svm;
unix_shared_memory_queue_t *q;
int rv = 0;
void *oldheap;
api_main_t *am = &api_main;
/*
* This is tortured. Maintain a vlib-address-space private
* pool of client registrations. We use the shared-memory virtual
* address of client structure as a handle, to allow direct
* manipulation of context quota vbls from the client library.
*
* This scheme causes trouble w/ API message trace replay, since
* some random VA from clib_mem_alloc() certainly won't
* occur in the Linux sim. The (very) few places
* that care need to use the pool index.
*
* Putting the registration object(s) into a pool in shared memory and
* using the pool index as a handle seems like a great idea.
* Unfortunately, each and every reference to that pool would need
* to be protected by a mutex:
*
* Client VLIB
* ------ ----
* convert pool index to
* pointer.
* <deschedule>
* expand pool
* <deschedule>
* kaboom!
*/
pool_get (am->vl_clients, regpp);
svm = am->vlib_rp;
pthread_mutex_lock (&svm->mutex);
oldheap = svm_push_data_heap (svm);
*regpp = clib_mem_alloc (sizeof (vl_api_registration_t));
regp = *regpp;
memset (regp, 0, sizeof (*regp));
regp->registration_type = REGISTRATION_TYPE_SHMEM;
regp->vl_api_registration_pool_index = regpp - am->vl_clients;
regp->vlib_rp = svm;
regp->shmem_hdr = am->shmem_hdr;
q = regp->vl_input_queue = (unix_shared_memory_queue_t *) (uword)
mp->input_queue;
regp->name = format (0, "%s", mp->name);
vec_add1 (regp->name, 0);
if (am->serialized_message_table_in_shmem == 0)
am->serialized_message_table_in_shmem =
vl_api_serialize_message_table (am, 0);
pthread_mutex_unlock (&svm->mutex);
svm_pop_heap (oldheap);
rp = vl_msg_api_alloc (sizeof (*rp));
rp->_vl_msg_id = ntohs (VL_API_MEMCLNT_CREATE_REPLY);
rp->handle = (uword) regp;
rp->index = vl_msg_api_handle_from_index_and_epoch
(regp->vl_api_registration_pool_index,
am->shmem_hdr->application_restarts);
rp->context = mp->context;
rp->response = ntohl (rv);
rp->message_table =
pointer_to_uword (am->serialized_message_table_in_shmem);
vl_msg_api_send_shmem (q, (u8 *) & rp);
}
static int
call_reaper_functions (u32 client_index)
{
clib_error_t *error = 0;
_vl_msg_api_function_list_elt_t *i;
i = api_main.reaper_function_registrations;
while (i)
{
error = i->f (client_index);
if (error)
clib_error_report (error);
i = i->next_init_function;
}
return 0;
}
/*
* vl_api_memclnt_delete_t_handler
*/
void
vl_api_memclnt_delete_t_handler (vl_api_memclnt_delete_t * mp)
{
vl_api_registration_t **regpp;
vl_api_registration_t *regp;
vl_api_memclnt_delete_reply_t *rp;
svm_region_t *svm;
void *oldheap;
api_main_t *am = &api_main;
u32 handle, client_index, epoch;
handle = mp->index;
if (call_reaper_functions (handle))
return;
epoch = vl_msg_api_handle_get_epoch (handle);
client_index = vl_msg_api_handle_get_index (handle);
if (epoch != (am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK))
{
clib_warning
("Stale clnt delete index %d old epoch %d cur epoch %d",
client_index, epoch,
(am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK));
return;
}
regpp = am->vl_clients + client_index;
if (!pool_is_free (am->vl_clients, regpp))
{
int i;
regp = *regpp;
svm = am->vlib_rp;
int private_registration = 0;
/*
* Note: the API message handling path will set am->vlib_rp
* as appropriate for pairwise / private memory segments
*/
rp = vl_msg_api_alloc (sizeof (*rp));
rp->_vl_msg_id = ntohs (VL_API_MEMCLNT_DELETE_REPLY);
rp->handle = mp->handle;
rp->response = 1;
vl_msg_api_send_shmem (regp->vl_input_queue, (u8 *) & rp);
if (client_index != regp->vl_api_registration_pool_index)
{
clib_warning ("mismatch client_index %d pool_index %d",
client_index, regp->vl_api_registration_pool_index);
vl_msg_api_free (rp);
return;
}
/* For horizontal scaling, add a hash table... */
for (i = 0; i < vec_len (am->vlib_private_rps); i++)
{
/* Is this a pairwise / private API segment? */
if (am->vlib_private_rps[i] == svm)
{
/* Note: account for the memfd header page */
u64 virtual_base = svm->virtual_base - MMAP_PAGESIZE;
u64 virtual_size = svm->virtual_size + MMAP_PAGESIZE;
/*
* Kill the registration pool element before we make
* the index vanish forever
*/
pool_put_index (am->vl_clients,
regp->vl_api_registration_pool_index);
vec_delete (am->vlib_private_rps, 1, i);
/* Kill it, accounting for the memfd header page */
if (munmap ((void *) virtual_base, virtual_size) < 0)
clib_unix_warning ("munmap");
/* Reset the queue-length-address cache */
vec_reset_length (vl_api_queue_cursizes);
private_registration = 1;
break;
}
}
/* No dangling references, please */
*regpp = 0;
if (private_registration == 0)
{
pool_put_index (am->vl_clients,
regp->vl_api_registration_pool_index);
pthread_mutex_lock (&svm->mutex);
oldheap = svm_push_data_heap (svm);
/* Poison the old registration */
memset (regp, 0xF1, sizeof (*regp));
clib_mem_free (regp);
pthread_mutex_unlock (&svm->mutex);
svm_pop_heap (oldheap);
/*
* These messages must be freed manually, since they're set up
* as "bounce" messages. In the private_registration == 1 case,
* we kill the shared-memory segment which contains the message
* with munmap.
*/
vl_msg_api_free (mp);
}
}
else
{
clib_warning ("unknown client ID %d", mp->index);
}
}
void
vl_api_get_first_msg_id_t_handler (vl_api_get_first_msg_id_t * mp)
{
vl_api_get_first_msg_id_reply_t *rmp;
unix_shared_memory_queue_t *q;
uword *p;
api_main_t *am = &api_main;
vl_api_msg_range_t *rp;
u8 name[64];
u16 first_msg_id = ~0;
int rv = -7; /* VNET_API_ERROR_INVALID_VALUE */
q = vl_api_client_index_to_input_queue (mp->client_index);
if (!q)
return;
if (am->msg_range_by_name == 0)
goto out;
strncpy ((char *) name, (char *) mp->name, ARRAY_LEN (name) - 1);
p = hash_get_mem (am->msg_range_by_name, name);
if (p == 0)
goto out;
rp = vec_elt_at_index (am->msg_ranges, p[0]);
first_msg_id = rp->first_msg_id;
rv = 0;
out:
rmp = vl_msg_api_alloc (sizeof (*rmp));
rmp->_vl_msg_id = ntohs (VL_API_GET_FIRST_MSG_ID_REPLY);
rmp->context = mp->context;
rmp->retval = ntohl (rv);
rmp->first_msg_id = ntohs (first_msg_id);
vl_msg_api_send_shmem (q, (u8 *) & rmp);
}
/**
* client answered a ping, stave off the grim reaper...
*/
void
vl_api_memclnt_keepalive_reply_t_handler
(vl_api_memclnt_keepalive_reply_t * mp)
{
vl_api_registration_t *regp;
vlib_main_t *vm = vlib_get_main ();
regp = vl_api_client_index_to_registration (mp->context);
if (regp)
{
regp->last_heard = vlib_time_now (vm);
regp->unanswered_pings = 0;
}
else
clib_warning ("BUG: anonymous memclnt_keepalive_reply");
}
/**
* We can send ourselves these messages if someone uses the
* builtin binary api test tool...
*/
static void
vl_api_memclnt_keepalive_t_handler (vl_api_memclnt_keepalive_t * mp)
{
vl_api_memclnt_keepalive_reply_t *rmp;
api_main_t *am;
vl_shmem_hdr_t *shmem_hdr;
am = &api_main;
shmem_hdr = am->shmem_hdr;
rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp));
memset (rmp, 0, sizeof (*rmp));
rmp->_vl_msg_id = ntohs (VL_API_MEMCLNT_KEEPALIVE_REPLY);
rmp->context = mp->context;
vl_msg_api_send_shmem (shmem_hdr->vl_input_queue, (u8 *) & rmp);
}
void
vl_api_api_versions_t_handler (vl_api_api_versions_t * mp)
{
api_main_t *am = &api_main;
vl_api_api_versions_reply_t *rmp;
unix_shared_memory_queue_t *q;
u32 nmsg = vec_len (am->api_version_list);
int msg_size = sizeof (*rmp) + sizeof (rmp->api_versions[0]) * nmsg;
int i;
q = vl_api_client_index_to_input_queue (mp->client_index);
if (q == 0)
return;
rmp = vl_msg_api_alloc (msg_size);
memset (rmp, 0, msg_size);
rmp->_vl_msg_id = ntohs (VL_API_API_VERSIONS_REPLY);
/* fill in the message */
rmp->context = mp->context;
rmp->count = htonl (nmsg);
for (i = 0; i < nmsg; ++i)
{
api_version_t *vl = &am->api_version_list[i];
rmp->api_versions[i].major = htonl (vl->major);
rmp->api_versions[i].minor = htonl (vl->minor);
rmp->api_versions[i].patch = htonl (vl->patch);
strncpy ((char *) rmp->api_versions[i].name, vl->name, 64 - 1);
}
vl_msg_api_send_shmem (q, (u8 *) & rmp);
}
#define foreach_vlib_api_msg \
_(MEMCLNT_CREATE, memclnt_create) \
_(MEMCLNT_DELETE, memclnt_delete) \
_(GET_FIRST_MSG_ID, get_first_msg_id) \
_(MEMCLNT_KEEPALIVE, memclnt_keepalive) \
_(MEMCLNT_KEEPALIVE_REPLY, memclnt_keepalive_reply) \
_(API_VERSIONS, api_versions)
/*
* vl_api_init
*/
static int
memory_api_init (const char *region_name)
{
int rv;
api_main_t *am = &api_main;
vl_msg_api_msg_config_t cfg;
vl_msg_api_msg_config_t *c = &cfg;
memset (c, 0, sizeof (*c));
if ((rv = vl_map_shmem (region_name, 1 /* is_vlib */ )) < 0)
return rv;
#define _(N,n) do { \
c->id = VL_API_##N; \
c->name = #n; \
c->handler = vl_api_##n##_t_handler; \
c->cleanup = vl_noop_handler; \
c->endian = vl_api_##n##_t_endian; \
c->print = vl_api_##n##_t_print; \
c->size = sizeof(vl_api_##n##_t); \
c->traced = 1; /* trace, so these msgs print */ \
c->replay = 0; /* don't replay client create/delete msgs */ \
c->message_bounce = 0; /* don't bounce this message */ \
vl_msg_api_config(c);} while (0);
foreach_vlib_api_msg;
#undef _
/*
* special-case freeing of memclnt_delete messages, so we can
* simply munmap pairwise / private API segments...
*/
am->message_bounce[VL_API_MEMCLNT_DELETE] = 1;
am->is_mp_safe[VL_API_MEMCLNT_KEEPALIVE_REPLY] = 1;
return 0;
}
#define foreach_histogram_bucket \
_(400) \
_(200) \
_(100) \
_(10)
typedef enum
{
#define _(n) SLEEP_##n##_US,
foreach_histogram_bucket
#undef _
SLEEP_N_BUCKETS,
} histogram_index_t;
static u64 vector_rate_histogram[SLEEP_N_BUCKETS];
static void memclnt_queue_callback (vlib_main_t * vm);
/*
* Callback to send ourselves a plugin numbering-space trace msg
*/
static void
send_one_plugin_msg_ids_msg (u8 * name, u16 first_msg_id, u16 last_msg_id)
{
vl_api_trace_plugin_msg_ids_t *mp;
api_main_t *am = &api_main;
vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
unix_shared_memory_queue_t *q;
mp = vl_msg_api_alloc_as_if_client (sizeof (*mp));
memset (mp, 0, sizeof (*mp));
mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_TRACE_PLUGIN_MSG_IDS);
strncpy ((char *) mp->plugin_name, (char *) name,
sizeof (mp->plugin_name) - 1);
mp->first_msg_id = clib_host_to_net_u16 (first_msg_id);
mp->last_msg_id = clib_host_to_net_u16 (last_msg_id);
q = shmem_hdr->vl_input_queue;
vl_msg_api_send_shmem (q, (u8 *) & mp);
}
static void
send_memclnt_keepalive (vl_api_registration_t * regp, f64 now)
{
vl_api_memclnt_keepalive_t *mp;
unix_shared_memory_queue_t *q;
api_main_t *am = &api_main;
svm_region_t *save_vlib_rp = am->vlib_rp;
vl_shmem_hdr_t *save_shmem_hdr = am->shmem_hdr;
q = regp->vl_input_queue;
/*
* If the queue head is moving, assume that the client is processing
* messages and skip the ping. This heuristic may fail if the queue
* is in the same position as last time, net of wrapping; in which
* case, the client will receive a keepalive.
*/
if (regp->last_queue_head != q->head)
{
regp->last_heard = now;
regp->unanswered_pings = 0;
regp->last_queue_head = q->head;
return;
}
/*
* push/pop shared memory segment, so this routine
* will work with "normal" as well as "private segment"
* memory clients..
*/
am->vlib_rp = regp->vlib_rp;
am->shmem_hdr = regp->shmem_hdr;
mp = vl_msg_api_alloc (sizeof (*mp));
memset (mp, 0, sizeof (*mp));
mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_MEMCLNT_KEEPALIVE);
mp->context = mp->client_index =
vl_msg_api_handle_from_index_and_epoch
(regp->vl_api_registration_pool_index,
am->shmem_hdr->application_restarts);
regp->unanswered_pings++;
/* Failure-to-send due to a stuffed queue is absolutely expected */
if (unix_shared_memory_queue_add (q, (u8 *) & mp, 1 /* nowait */ ))
vl_msg_api_free (mp);
am->vlib_rp = save_vlib_rp;
am->shmem_hdr = save_shmem_hdr;
}
static void
dead_client_scan (api_main_t * am, vl_shmem_hdr_t * shm, f64 now)
{
vl_api_registration_t **regpp;
vl_api_registration_t *regp;
static u32 *dead_indices;
static u32 *confused_indices;
vec_reset_length (dead_indices);
vec_reset_length (confused_indices);
/* *INDENT-OFF* */
pool_foreach (regpp, am->vl_clients,
({
regp = *regpp;
if (regp)
{
/* If we haven't heard from this client recently... */
if (regp->last_heard < (now - 10.0))
{
if (regp->unanswered_pings == 2)
{
unix_shared_memory_queue_t *q;
q = regp->vl_input_queue;
if (kill (q->consumer_pid, 0) >=0)
{
clib_warning ("REAPER: lazy binary API client '%s'",
regp->name);
regp->unanswered_pings = 0;
regp->last_heard = now;
}
else
{
clib_warning ("REAPER: binary API client '%s' died",
regp->name);
vec_add1(dead_indices, regpp - am->vl_clients);
}
}
else
send_memclnt_keepalive (regp, now);
}
else
regp->unanswered_pings = 0;
}
else
{
clib_warning ("NULL client registration index %d",
regpp - am->vl_clients);
vec_add1 (confused_indices, regpp - am->vl_clients);
}
}));
/* *INDENT-ON* */
/* This should "never happen," but if it does, fix it... */
if (PREDICT_FALSE (vec_len (confused_indices) > 0))
{
int i;
for (i = 0; i < vec_len (confused_indices); i++)
{
pool_put_index (am->vl_clients, confused_indices[i]);
}
}
if (PREDICT_FALSE (vec_len (dead_indices) > 0))
{
int i;
svm_region_t *svm;
void *oldheap;
/* Allow the application to clean up its registrations */
for (i = 0; i < vec_len (dead_indices); i++)
{
regpp = pool_elt_at_index (am->vl_clients, dead_indices[i]);
if (regpp)
{
u32 handle;
handle = vl_msg_api_handle_from_index_and_epoch
(dead_indices[i], shm->application_restarts);
(void) call_reaper_functions (handle);
}
}
svm = am->vlib_rp;
pthread_mutex_lock (&svm->mutex);
oldheap = svm_push_data_heap (svm);
for (i = 0; i < vec_len (dead_indices); i++)
{
regpp = pool_elt_at_index (am->vl_clients, dead_indices[i]);
if (regpp)
{
/* Is this a pairwise SVM segment? */
if ((*regpp)->vlib_rp != svm)
{
int i;
svm_region_t *dead_rp = (*regpp)->vlib_rp;
/* Note: account for the memfd header page */
u64 virtual_base = dead_rp->virtual_base - MMAP_PAGESIZE;
u64 virtual_size = dead_rp->virtual_size + MMAP_PAGESIZE;
/* For horizontal scaling, add a hash table... */
for (i = 0; i < vec_len (am->vlib_private_rps); i++)
if (am->vlib_private_rps[i] == dead_rp)
{
vec_delete (am->vlib_private_rps, 1, i);
goto found;
}
clib_warning ("private rp %llx AWOL", dead_rp);
found:
/* Kill it, accounting for the memfd header page */
if (munmap ((void *) virtual_base, virtual_size) < 0)
clib_unix_warning ("munmap");
/* Reset the queue-length-address cache */
vec_reset_length (vl_api_queue_cursizes);
}
else
{
/* Poison the old registration */
memset (*regpp, 0xF3, sizeof (**regpp));
clib_mem_free (*regpp);
}
/* no dangling references, please */
*regpp = 0;
}
else
{
svm_pop_heap (oldheap);
clib_warning ("Duplicate free, client index %d",
regpp - am->vl_clients);
oldheap = svm_push_data_heap (svm);
}
}
svm_client_scan_this_region_nolock (am->vlib_rp);
pthread_mutex_unlock (&svm->mutex);
svm_pop_heap (oldheap);
for (i = 0; i < vec_len (dead_indices); i++)
pool_put_index (am->vl_clients, dead_indices[i]);
}
}
static uword
memclnt_process (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * f)
{
uword mp;
vl_shmem_hdr_t *shm;
unix_shared_memory_queue_t *q;
clib_error_t *e;
int rv;
api_main_t *am = &api_main;
f64 dead_client_scan_time;
f64 sleep_time, start_time;
f64 vector_rate;
clib_error_t *socksvr_api_init (vlib_main_t * vm);
clib_error_t *error;
int i;
vl_socket_args_for_process_t *a;
uword event_type;
uword *event_data = 0;
int private_segment_rotor = 0;
svm_region_t *vlib_rp;
f64 now;
vlib_set_queue_signal_callback (vm, memclnt_queue_callback);
if ((rv = memory_api_init (am->region_name)) < 0)
{
clib_warning ("memory_api_init returned %d, quitting...", rv);
return 0;
}
if ((error = socksvr_api_init (vm)))
{
clib_error_report (error);
clib_warning ("socksvr_api_init failed, quitting...");
return 0;
}
shm = am->shmem_hdr;
ASSERT (shm);
q = shm->vl_input_queue;
ASSERT (q);
/* Make a note so we can always find the primary region easily */
am->vlib_primary_rp = am->vlib_rp;
e = vlib_call_init_exit_functions
(vm, vm->api_init_function_registrations, 1 /* call_once */ );
if (e)
clib_error_report (e);
sleep_time = 10.0;
dead_client_scan_time = vlib_time_now (vm) + 10.0;
/*
* Send plugin message range messages for each plugin we loaded
*/
for (i = 0; i < vec_len (am->msg_ranges); i++)
{
vl_api_msg_range_t *rp = am->msg_ranges + i;
send_one_plugin_msg_ids_msg (rp->name, rp->first_msg_id,
rp->last_msg_id);
}
/*
* Save the api message table snapshot, if configured
*/
if (am->save_msg_table_filename)
{
int fd, rv;
u8 *chroot_file;
u8 *serialized_message_table;
/*
* Snapshoot the api message table.
*/
if (strstr ((char *) am->save_msg_table_filename, "..")
|| index ((char *) am->save_msg_table_filename, '/'))
{
clib_warning ("illegal save-message-table filename '%s'",
am->save_msg_table_filename);
goto skip_save;
}
chroot_file = format (0, "/tmp/%s%c", am->save_msg_table_filename, 0);
fd = creat ((char *) chroot_file, 0644);
if (fd < 0)
{
clib_unix_warning ("creat");
goto skip_save;
}
serialized_message_table = vl_api_serialize_message_table (am, 0);
rv = write (fd, serialized_message_table,
vec_len (serialized_message_table));
if (rv != vec_len (serialized_message_table))
clib_unix_warning ("write");
rv = close (fd);
if (rv < 0)
clib_unix_warning ("close");
vec_free (chroot_file);
vec_free (serialized_message_table);
}
skip_save:
/* $$$ pay attention to frame size, control CPU usage */
while (1)
{
i8 *headp;
int need_broadcast;
/*
* There's a reason for checking the queue before
* sleeping. If the vlib application crashes, it's entirely
* possible for a client to enqueue a connect request
* during the process restart interval.
*
* Unless some force of physics causes the new incarnation
* of the application to process the request, the client will
* sit and wait for Godot...
*/
vector_rate = vlib_last_vector_length_per_node (vm);
start_time = vlib_time_now (vm);
while (1)
{
pthread_mutex_lock (&q->mutex);
if (q->cursize == 0)
{
vm->api_queue_nonempty = 0;
pthread_mutex_unlock (&q->mutex);
if (TRACE_VLIB_MEMORY_QUEUE)
{
/* *INDENT-OFF* */
ELOG_TYPE_DECLARE (e) =
{
.format = "q-underflow: len %d",
.format_args = "i4",
};
/* *INDENT-ON* */
struct
{
u32 len;
} *ed;
ed = ELOG_DATA (&vm->elog_main, e);
ed->len = 0;
}
sleep_time = 20.0;
break;
}
headp = (i8 *) (q->data + sizeof (uword) * q->head);
clib_memcpy (&mp, headp, sizeof (uword));
q->head++;
need_broadcast = (q->cursize == q->maxsize / 2);
q->cursize--;
if (PREDICT_FALSE (q->head == q->maxsize))
q->head = 0;
pthread_mutex_unlock (&q->mutex);
if (need_broadcast)
(void) pthread_cond_broadcast (&q->condvar);
vl_msg_api_handler_with_vm_node (am, (void *) mp, vm, node);
/* Allow no more than 10us without a pause */
if (vlib_time_now (vm) > start_time + 10e-6)
{
int index = SLEEP_400_US;
if (vector_rate > 40.0)
sleep_time = 400e-6;
else if (vector_rate > 20.0)
{
index = SLEEP_200_US;
sleep_time = 200e-6;
}
else if (vector_rate >= 1.0)
{
index = SLEEP_100_US;
sleep_time = 100e-6;
}
else
{
index = SLEEP_10_US;
sleep_time = 10e-6;
}
vector_rate_histogram[index] += 1;
break;
}
}
/*
* see if we have any private api shared-memory segments
* If so, push required context variables, and process
* a message.
*/
if (PREDICT_FALSE (vec_len (am->vlib_private_rps)))
{
unix_shared_memory_queue_t *save_vlib_input_queue = q;
vl_shmem_hdr_t *save_shmem_hdr = am->shmem_hdr;
svm_region_t *save_vlib_rp = am->vlib_rp;
vlib_rp = am->vlib_rp = am->vlib_private_rps[private_segment_rotor];
am->shmem_hdr = (void *) vlib_rp->user_ctx;
q = am->shmem_hdr->vl_input_queue;
pthread_mutex_lock (&q->mutex);
if (q->cursize > 0)
{
headp = (i8 *) (q->data + sizeof (uword) * q->head);
clib_memcpy (&mp, headp, sizeof (uword));
q->head++;
need_broadcast = (q->cursize == q->maxsize / 2);
q->cursize--;
if (PREDICT_FALSE (q->head == q->maxsize))
q->head = 0;
pthread_mutex_unlock (&q->mutex);
if (need_broadcast)
(void) pthread_cond_broadcast (&q->condvar);
vl_msg_api_handler_with_vm_node (am, (void *) mp, vm, node);
}
else
pthread_mutex_unlock (&q->mutex);
q = save_vlib_input_queue;
am->shmem_hdr = save_shmem_hdr;
am->vlib_rp = save_vlib_rp;
private_segment_rotor++;
if (private_segment_rotor >= vec_len (am->vlib_private_rps))
private_segment_rotor = 0;
}
vlib_process_wait_for_event_or_clock (vm, sleep_time);
vec_reset_length (event_data);
event_type = vlib_process_get_events (vm, &event_data);
now = vlib_time_now (vm);
switch (event_type)
{
case QUEUE_SIGNAL_EVENT:
vm->queue_signal_pending = 0;
break;
case SOCKET_READ_EVENT:
for (i = 0; i < vec_len (event_data); i++)
{
a = pool_elt_at_index (socket_main.process_args, event_data[i]);
vl_api_socket_process_msg (a->clib_file, a->regp,
(i8 *) a->data);
vec_free (a->data);
pool_put (socket_main.process_args, a);
}
break;
/* Timeout... */
case -1:
break;
default:
clib_warning ("unknown event type %d", event_type);
break;
}
if (now > dead_client_scan_time)
{
dead_client_scan (am, shm, now);
dead_client_scan_time = vlib_time_now (vm) + 10.0;
}
if (TRACE_VLIB_MEMORY_QUEUE)
{
/* *INDENT-OFF* */
ELOG_TYPE_DECLARE (e) = {
.format = "q-awake: len %d",
.format_args = "i4",
};
/* *INDENT-ON* */
struct
{
u32 len;
} *ed;
ed = ELOG_DATA (&vm->elog_main, e);
ed->len = q->cursize;
}
}
return 0;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (memclnt_node) =
{
.function = memclnt_process,
.type = VLIB_NODE_TYPE_PROCESS,
.name = "api-rx-from-ring",
.state = VLIB_NODE_STATE_DISABLED,
};
/* *INDENT-ON* */
static clib_error_t *
vl_api_show_histogram_command (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cli_cmd)
{
u64 total_counts = 0;
int i;
for (i = 0; i < SLEEP_N_BUCKETS; i++)
{
total_counts += vector_rate_histogram[i];
}
if (total_counts == 0)
{
vlib_cli_output (vm, "No control-plane activity.");
return 0;
}
#define _(n) \
do { \
f64 percent; \
percent = ((f64) vector_rate_histogram[SLEEP_##n##_US]) \
/ (f64) total_counts; \
percent *= 100.0; \
vlib_cli_output (vm, "Sleep %3d us: %llu, %.2f%%",n, \
vector_rate_histogram[SLEEP_##n##_US], \
percent); \
} while (0);
foreach_histogram_bucket;
#undef _
return 0;
}
/*?
* Display the binary api sleep-time histogram
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cli_show_api_histogram_command, static) =
{
.path = "show api histogram",
.short_help = "show api histogram",
.function = vl_api_show_histogram_command,
};
/* *INDENT-ON* */
static clib_error_t *
vl_api_clear_histogram_command (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cli_cmd)
{
int i;
for (i = 0; i < SLEEP_N_BUCKETS; i++)
vector_rate_histogram[i] = 0;
return 0;
}
/*?
* Clear the binary api sleep-time histogram
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cli_clear_api_histogram_command, static) =
{
.path = "clear api histogram",
.short_help = "clear api histogram",
.function = vl_api_clear_histogram_command,
};
/* *INDENT-ON* */
volatile int **vl_api_queue_cursizes;
static void
memclnt_queue_callback (vlib_main_t * vm)
{
int i;
api_main_t *am = &api_main;
if (PREDICT_FALSE (vec_len (vl_api_queue_cursizes) !=
1 + vec_len (am->vlib_private_rps)))
{
vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
unix_shared_memory_queue_t *q;
if (shmem_hdr == 0)
return;
q = shmem_hdr->vl_input_queue;
if (q == 0)
return;
vec_add1 (vl_api_queue_cursizes, &q->cursize);
for (i = 0; i < vec_len (am->vlib_private_rps); i++)
{
svm_region_t *vlib_rp = am->vlib_private_rps[i];
shmem_hdr = (void *) vlib_rp->user_ctx;
q = shmem_hdr->vl_input_queue;
vec_add1 (vl_api_queue_cursizes, &q->cursize);
}
}
for (i = 0; i < vec_len (vl_api_queue_cursizes); i++)
{
if (*vl_api_queue_cursizes[i])
{
vm->queue_signal_pending = 1;
vm->api_queue_nonempty = 1;
vlib_process_signal_event (vm, memclnt_node.index,
/* event_type */ QUEUE_SIGNAL_EVENT,
/* event_data */ 0);
break;
}
}
}
void
vl_enable_disable_memory_api (vlib_main_t * vm, int enable)
{
vlib_node_set_state (vm, memclnt_node.index,
(enable
? VLIB_NODE_STATE_POLLING
: VLIB_NODE_STATE_DISABLED));
}
static uword
api_rx_from_node (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
uword n_packets = frame->n_vectors;
uword n_left_from;
u32 *from;
static u8 *long_msg;
vec_validate (long_msg, 4095);
n_left_from = frame->n_vectors;
from = vlib_frame_args (frame);
while (n_left_from > 0)
{
u32 bi0;
vlib_buffer_t *b0;
void *msg;
uword msg_len;
bi0 = from[0];
b0 = vlib_get_buffer (vm, bi0);
from += 1;
n_left_from -= 1;
msg = b0->data + b0->current_data;
msg_len = b0->current_length;
if (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
{
ASSERT (long_msg != 0);
_vec_len (long_msg) = 0;
vec_add (long_msg, msg, msg_len);
while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
{
b0 = vlib_get_buffer (vm, b0->next_buffer);
msg = b0->data + b0->current_data;
msg_len = b0->current_length;
vec_add (long_msg, msg, msg_len);
}
msg = long_msg;
}
vl_msg_api_handler_no_trace_no_free (msg);
}
/* Free what we've been given. */
vlib_buffer_free (vm, vlib_frame_args (frame), n_packets);
return n_packets;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (api_rx_from_node_node,static) = {
.function = api_rx_from_node,
.type = VLIB_NODE_TYPE_INTERNAL,
.vector_size = 4,
.name = "api-rx-from-node",
};
/* *INDENT-ON* */
static clib_error_t *
setup_memclnt_exit (vlib_main_t * vm)
{
atexit (vl_unmap_shmem);
return 0;
}
VLIB_INIT_FUNCTION (setup_memclnt_exit);
u8 *
format_api_message_rings (u8 * s, va_list * args)
{
api_main_t *am = va_arg (*args, api_main_t *);
vl_shmem_hdr_t *shmem_hdr = va_arg (*args, vl_shmem_hdr_t *);
int main_segment = va_arg (*args, int);
ring_alloc_t *ap;
int i;
if (shmem_hdr == 0)
return format (s, "%8s %8s %8s %8s %8s\n",
"Owner", "Size", "Nitems", "Hits", "Misses");
ap = shmem_hdr->vl_rings;
for (i = 0; i < vec_len (shmem_hdr->vl_rings); i++)
{
s = format (s, "%8s %8d %8d %8d %8d\n",
"vlib", ap->size, ap->nitems, ap->hits, ap->misses);
ap++;
}
ap = shmem_hdr->client_rings;
for (i = 0; i < vec_len (shmem_hdr->client_rings); i++)
{
s = format (s, "%8s %8d %8d %8d %8d\n",
"clnt", ap->size, ap->nitems, ap->hits, ap->misses);
ap++;
}
if (main_segment)
{
s = format (s, "%d ring miss fallback allocations\n", am->ring_misses);
s = format
(s,
"%d application restarts, %d reclaimed msgs, %d garbage collects\n",
shmem_hdr->application_restarts, shmem_hdr->restart_reclaims,
shmem_hdr->garbage_collects);
}
return s;
}
static clib_error_t *
vl_api_ring_command (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cli_cmd)
{
int i;
vl_shmem_hdr_t *shmem_hdr;
api_main_t *am = &api_main;
/* First, dump the primary region rings.. */
if (am->vlib_primary_rp == 0 || am->vlib_primary_rp->user_ctx == 0)
{
vlib_cli_output (vm, "Shared memory segment not initialized...\n");
return 0;
}
shmem_hdr = (void *) am->vlib_primary_rp->user_ctx;
vlib_cli_output (vm, "Main API segment rings:");
vlib_cli_output (vm, "%U", format_api_message_rings, am,
0 /* print header */ , 0 /* notused */ );
vlib_cli_output (vm, "%U", format_api_message_rings, am,
shmem_hdr, 1 /* main segment */ );
for (i = 0; i < vec_len (am->vlib_private_rps); i++)
{
svm_region_t *vlib_rp = am->vlib_private_rps[i];
shmem_hdr = (void *) vlib_rp->user_ctx;
vl_api_registration_t **regpp;
vl_api_registration_t *regp = 0;
/* For horizontal scaling, add a hash table... */
/* *INDENT-OFF* */
pool_foreach (regpp, am->vl_clients,
({
regp = *regpp;
if (regp && regp->vlib_rp == vlib_rp)
{
vlib_cli_output (vm, "%s segment rings:", regp->name);
goto found;
}
}));
vlib_cli_output (vm, "regp %llx not found?", regp);
continue;
/* *INDENT-ON* */
found:
vlib_cli_output (vm, "%U", format_api_message_rings, am,
0 /* print header */ , 0 /* notused */ );
vlib_cli_output (vm, "%U", format_api_message_rings, am,
shmem_hdr, 0 /* main segment */ );
}
return 0;
}
void dump_socket_clients (vlib_main_t * vm, api_main_t * am)
__attribute__ ((weak));
void
dump_socket_clients (vlib_main_t * vm, api_main_t * am)
{
}
static clib_error_t *
vl_api_client_command (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cli_cmd)
{
vl_api_registration_t **regpp, *regp;
unix_shared_memory_queue_t *q;
char *health;
api_main_t *am = &api_main;
u32 *confused_indices = 0;
if (!pool_elts (am->vl_clients))
goto socket_clients;
vlib_cli_output (vm, "Shared memory clients");
vlib_cli_output (vm, "%16s %8s %14s %18s %s",
"Name", "PID", "Queue Length", "Queue VA", "Health");
/* *INDENT-OFF* */
pool_foreach (regpp, am->vl_clients,
({
regp = *regpp;
if (regp)
{
if (regp->unanswered_pings > 0)
health = "questionable";
else
health = "OK";
q = regp->vl_input_queue;
vlib_cli_output (vm, "%16s %8d %14d 0x%016llx %s\n",
regp->name, q->consumer_pid, q->cursize,
q, health);
}
else
{
clib_warning ("NULL client registration index %d",
regpp - am->vl_clients);
vec_add1 (confused_indices, regpp - am->vl_clients);
}
}));
/* *INDENT-ON* */
/* This should "never happen," but if it does, fix it... */
if (PREDICT_FALSE (vec_len (confused_indices) > 0))
{
int i;
for (i = 0; i < vec_len (confused_indices); i++)
{
pool_put_index (am->vl_clients, confused_indices[i]);
}
}
vec_free (confused_indices);
if (am->missing_clients)
vlib_cli_output (vm, "%u messages with missing clients",
am->missing_clients);
socket_clients:
dump_socket_clients (vm, am);
return 0;
}
static clib_error_t *
vl_api_status_command (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cli_cmd)
{
api_main_t *am = &api_main;
// check if rx_trace and tx_trace are not null pointers
if (am->rx_trace == 0)
{
vlib_cli_output (vm, "RX Trace disabled\n");
}
else
{
if (am->rx_trace->enabled == 0)
vlib_cli_output (vm, "RX Trace disabled\n");
else
vlib_cli_output (vm, "RX Trace enabled\n");
}
if (am->tx_trace == 0)
{
vlib_cli_output (vm, "TX Trace disabled\n");
}
else
{
if (am->tx_trace->enabled == 0)
vlib_cli_output (vm, "TX Trace disabled\n");
else
vlib_cli_output (vm, "TX Trace enabled\n");
}
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cli_show_api_command, static) =
{
.path = "show api",
.short_help = "Show API information",
};
/* *INDENT-ON* */
/*?
* Display binary api message allocation ring statistics
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cli_show_api_ring_command, static) =
{
.path = "show api ring-stats",
.short_help = "Message ring statistics",
.function = vl_api_ring_command,
};
/* *INDENT-ON* */
/*?
* Display current api client connections
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cli_show_api_clients_command, static) =
{
.path = "show api clients",
.short_help = "Client information",
.function = vl_api_client_command,
};
/* *INDENT-ON* */
/*?
* Display the current api message tracing status
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cli_show_api_status_command, static) =
{
.path = "show api trace-status",
.short_help = "Display API trace status",
.function = vl_api_status_command,
};
/* *INDENT-ON* */
static clib_error_t *
vl_api_message_table_command (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cli_cmd)
{
api_main_t *am = &api_main;
int i;
int verbose = 0;
if (unformat (input, "verbose"))
verbose = 1;
if (verbose == 0)
vlib_cli_output (vm, "%-4s %s", "ID", "Name");
else
vlib_cli_output (vm, "%-4s %-40s %6s %7s", "ID", "Name", "Bounce",
"MP-safe");
for (i = 1; i < vec_len (am->msg_names); i++)
{
if (verbose == 0)
{
vlib_cli_output (vm, "%-4d %s", i,
am->msg_names[i] ? am->msg_names[i] :
" [no handler]");
}
else
{
vlib_cli_output (vm, "%-4d %-40s %6d %7d", i,
am->msg_names[i] ? am->msg_names[i] :
" [no handler]", am->message_bounce[i],
am->is_mp_safe[i]);
}
}
return 0;
}
/*?
* Display the current api message decode tables
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cli_show_api_message_table_command, static) =
{
.path = "show api message-table",
.short_help = "Message Table",
.function = vl_api_message_table_command,
};
/* *INDENT-ON* */
static clib_error_t *
vl_api_trace_command (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cli_cmd)
{
u32 nitems = 1024;
vl_api_trace_which_t which = VL_API_TRACE_RX;
api_main_t *am = &api_main;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "rx nitems %u", &nitems) || unformat (input, "rx"))
goto configure;
else if (unformat (input, "tx nitems %u", &nitems)
|| unformat (input, "tx"))
{
which = VL_API_TRACE_RX;
goto configure;
}
else if (unformat (input, "on rx"))
{
vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 1);
}
else if (unformat (input, "on tx"))
{
vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 1);
}
else if (unformat (input, "on"))
{
vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 1);
}
else if (unformat (input, "off"))
{
vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 0);
vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 0);
}
else if (unformat (input, "free"))
{
vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 0);
vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 0);
vl_msg_api_trace_free (am, VL_API_TRACE_RX);
vl_msg_api_trace_free (am, VL_API_TRACE_TX);
}
else if (unformat (input, "debug on"))
{
am->msg_print_flag = 1;
}
else if (unformat (input, "debug off"))
{
am->msg_print_flag = 0;
}
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
}
return 0;
configure:
if (vl_msg_api_trace_configure (am, which, nitems))
{
vlib_cli_output (vm, "warning: trace configure error (%d, %d)",
which, nitems);
}
return 0;
}
/*?
* Control the binary API trace mechanism
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (trace, static) =
{
.path = "set api-trace [on][on tx][on rx][off][free][debug on][debug off]",
.short_help = "API trace",
.function = vl_api_trace_command,
};
/* *INDENT-ON* */
clib_error_t *
vlibmemory_init (vlib_main_t * vm)
{
api_main_t *am = &api_main;
svm_map_region_args_t _a, *a = &_a;
clib_error_t *error;
memset (a, 0, sizeof (*a));
a->root_path = am->root_path;
a->name = SVM_GLOBAL_REGION_NAME;
a->baseva = (am->global_baseva != 0) ?
am->global_baseva : SVM_GLOBAL_REGION_BASEVA;
a->size = (am->global_size != 0) ? am->global_size : SVM_GLOBAL_REGION_SIZE;
a->flags = SVM_FLAGS_NODATA;
a->uid = am->api_uid;
a->gid = am->api_gid;
a->pvt_heap_size =
(am->global_pvt_heap_size !=
0) ? am->global_pvt_heap_size : SVM_PVT_MHEAP_SIZE;
svm_region_init_args (a);
error = vlib_call_init_function (vm, vlibsocket_init);
return error;
}
VLIB_INIT_FUNCTION (vlibmemory_init);
void
vl_set_memory_region_name (const char *name)
{
api_main_t *am = &api_main;
am->region_name = name;
}
static int
range_compare (vl_api_msg_range_t * a0, vl_api_msg_range_t * a1)
{
int len0, len1, clen;
len0 = vec_len (a0->name);
len1 = vec_len (a1->name);
clen = len0 < len1 ? len0 : len1;
return (strncmp ((char *) a0->name, (char *) a1->name, clen));
}
static u8 *
format_api_msg_range (u8 * s, va_list * args)
{
vl_api_msg_range_t *rp = va_arg (*args, vl_api_msg_range_t *);
if (rp == 0)
s = format (s, "%-50s%9s%9s", "Name", "First-ID", "Last-ID");
else
s = format (s, "%-50s%9d%9d", rp->name, rp->first_msg_id,
rp->last_msg_id);
return s;
}
static clib_error_t *
vl_api_show_plugin_command (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cli_cmd)
{
api_main_t *am = &api_main;
vl_api_msg_range_t *rp = 0;
int i;
if (vec_len (am->msg_ranges) == 0)
{
vlib_cli_output (vm, "No plugin API message ranges configured...");
return 0;
}
rp = vec_dup (am->msg_ranges);
vec_sort_with_function (rp, range_compare);
vlib_cli_output (vm, "Plugin API message ID ranges...\n");
vlib_cli_output (vm, "%U", format_api_msg_range, 0 /* header */ );
for (i = 0; i < vec_len (rp); i++)
vlib_cli_output (vm, "%U", format_api_msg_range, rp + i);
vec_free (rp);
return 0;
}
/*?
* Display the plugin binary API message range table
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cli_show_api_plugin_command, static) =
{
.path = "show api plugin",
.short_help = "show api plugin",
.function = vl_api_show_plugin_command,
};
/* *INDENT-ON* */
static void
vl_api_rpc_call_t_handler (vl_api_rpc_call_t * mp)
{
vl_api_rpc_call_reply_t *rmp;
int (*fp) (void *);
i32 rv = 0;
vlib_main_t *vm = vlib_get_main ();
if (mp->function == 0)
{
rv = -1;
clib_warning ("rpc NULL function pointer");
}
else
{
if (mp->need_barrier_sync)
vlib_worker_thread_barrier_sync (vm);
fp = uword_to_pointer (mp->function, int (*)(void *));
rv = fp (mp->data);
if (mp->need_barrier_sync)
vlib_worker_thread_barrier_release (vm);
}
if (mp->send_reply)
{
unix_shared_memory_queue_t *q =
vl_api_client_index_to_input_queue (mp->client_index);
if (q)
{
rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp));
rmp->_vl_msg_id = ntohs (VL_API_RPC_CALL_REPLY);
rmp->context = mp->context;
rmp->retval = rv;
vl_msg_api_send_shmem (q, (u8 *) & rmp);
}
}
if (mp->multicast)
{
clib_warning ("multicast not yet implemented...");
}
}
static void
vl_api_rpc_call_reply_t_handler (vl_api_rpc_call_reply_t * mp)
{
clib_warning ("unimplemented");
}
void
vl_api_send_pending_rpc_requests (vlib_main_t * vm)
{
api_main_t *am = &api_main;
vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
unix_shared_memory_queue_t *q;
int i;
/*
* Use the "normal" control-plane mechanism for the main thread.
* Well, almost. if the main input queue is full, we cannot
* block. Otherwise, we can expect a barrier sync timeout.
*/
q = shmem_hdr->vl_input_queue;
for (i = 0; i < vec_len (vm->pending_rpc_requests); i++)
{
while (pthread_mutex_trylock (&q->mutex))
vlib_worker_thread_barrier_check ();
while (PREDICT_FALSE (unix_shared_memory_queue_is_full (q)))
{
pthread_mutex_unlock (&q->mutex);
vlib_worker_thread_barrier_check ();
while (pthread_mutex_trylock (&q->mutex))
vlib_worker_thread_barrier_check ();
}
vl_msg_api_send_shmem_nolock (q, (u8 *) (vm->pending_rpc_requests + i));
pthread_mutex_unlock (&q->mutex);
}
_vec_len (vm->pending_rpc_requests) = 0;
}
always_inline void
vl_api_rpc_call_main_thread_inline (void *fp, u8 * data, u32 data_length,
u8 force_rpc)
{
vl_api_rpc_call_t *mp;
vlib_main_t *vm = vlib_get_main ();
/* Main thread and not a forced RPC: call the function directly */
if ((force_rpc == 0) && (vlib_get_thread_index () == 0))
{
void (*call_fp) (void *);
vlib_worker_thread_barrier_sync (vm);
call_fp = fp;
call_fp (data);
vlib_worker_thread_barrier_release (vm);
return;
}
/* Otherwise, actually do an RPC */
mp = vl_msg_api_alloc_as_if_client (sizeof (*mp) + data_length);
memset (mp, 0, sizeof (*mp));
clib_memcpy (mp->data, data, data_length);
mp->_vl_msg_id = ntohs (VL_API_RPC_CALL);
mp->function = pointer_to_uword (fp);
mp->need_barrier_sync = 1;
vec_add1 (vm->pending_rpc_requests, (uword) mp);
}
/*
* Check if called from worker threads.
* If so, make rpc call of fp through shmem.
* Otherwise, call fp directly
*/
void
vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length)
{
vl_api_rpc_call_main_thread_inline (fp, data, data_length, /*force_rpc */
0);
}
/*
* Always make rpc call of fp through shmem, useful for calling from threads
* not setup as worker threads, such as DPDK callback thread
*/
void
vl_api_force_rpc_call_main_thread (void *fp, u8 * data, u32 data_length)
{
vl_api_rpc_call_main_thread_inline (fp, data, data_length, /*force_rpc */
1);
}
static void
vl_api_trace_plugin_msg_ids_t_handler (vl_api_trace_plugin_msg_ids_t * mp)
{
api_main_t *am = &api_main;
vl_api_msg_range_t *rp;
uword *p;
/* Noop (except for tracing) during normal operation */
if (am->replay_in_progress == 0)
return;
p = hash_get_mem (am->msg_range_by_name, mp->plugin_name);
if (p == 0)
{
clib_warning ("WARNING: traced plugin '%s' not in current image",
mp->plugin_name);
return;
}
rp = vec_elt_at_index (am->msg_ranges, p[0]);
if (rp->first_msg_id != clib_net_to_host_u16 (mp->first_msg_id))
{
clib_warning ("WARNING: traced plugin '%s' first message id %d not %d",
mp->plugin_name, clib_net_to_host_u16 (mp->first_msg_id),
rp->first_msg_id);
}
if (rp->last_msg_id != clib_net_to_host_u16 (mp->last_msg_id))
{
clib_warning ("WARNING: traced plugin '%s' last message id %d not %d",
mp->plugin_name, clib_net_to_host_u16 (mp->last_msg_id),
rp->last_msg_id);
}
}
#define foreach_rpc_api_msg \
_(RPC_CALL,rpc_call) \
_(RPC_CALL_REPLY,rpc_call_reply)
#define foreach_plugin_trace_msg \
_(TRACE_PLUGIN_MSG_IDS,trace_plugin_msg_ids)
/*
* Set the rpc callback at our earliest possible convenience.
* This avoids ordering issues between thread_init() -> start_workers and
* an init function which we could define here. If we ever intend to use
* vlib all by itself, we can't create a link-time dependency on
* an init function here and a typical "call foo_init first"
* guitar lick.
*/
extern void *rpc_call_main_thread_cb_fn;
static clib_error_t *
rpc_api_hookup (vlib_main_t * vm)
{
api_main_t *am = &api_main;
#define _(N,n) \
vl_msg_api_set_handlers(VL_API_##N, #n, \
vl_api_##n##_t_handler, \
vl_noop_handler, \
vl_noop_handler, \
vl_api_##n##_t_print, \
sizeof(vl_api_##n##_t), 0 /* do not trace */);
foreach_rpc_api_msg;
#undef _
#define _(N,n) \
vl_msg_api_set_handlers(VL_API_##N, #n, \
vl_api_##n##_t_handler, \
vl_noop_handler, \
vl_noop_handler, \
vl_api_##n##_t_print, \
sizeof(vl_api_##n##_t), 1 /* do trace */);
foreach_plugin_trace_msg;
#undef _
/* No reason to halt the parade to create a trace record... */
am->is_mp_safe[VL_API_TRACE_PLUGIN_MSG_IDS] = 1;
rpc_call_main_thread_cb_fn = vl_api_rpc_call_main_thread;
return 0;
}
VLIB_API_INIT_FUNCTION (rpc_api_hookup);
typedef enum
{
DUMP,
CUSTOM_DUMP,
REPLAY,
INITIALIZERS,
} vl_api_replay_t;
u8 *
format_vl_msg_api_trace_status (u8 * s, va_list * args)
{
api_main_t *am = va_arg (*args, api_main_t *);
vl_api_trace_which_t which = va_arg (*args, vl_api_trace_which_t);
vl_api_trace_t *tp;
char *trace_name;
switch (which)
{
case VL_API_TRACE_TX:
tp = am->tx_trace;
trace_name = "TX trace";
break;
case VL_API_TRACE_RX:
tp = am->rx_trace;
trace_name = "RX trace";
break;
default:
abort ();
}
if (tp == 0)
{
s = format (s, "%s: not yet configured.\n", trace_name);
return s;
}
s = format (s, "%s: used %d of %d items, %s enabled, %s wrapped\n",
trace_name, vec_len (tp->traces), tp->nitems,
tp->enabled ? "is" : "is not", tp->wrapped ? "has" : "has not");
return s;
}
void vl_msg_api_custom_dump_configure (api_main_t * am)
__attribute__ ((weak));
void
vl_msg_api_custom_dump_configure (api_main_t * am)
{
}
static void
vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
u32 first_index, u32 last_index,
vl_api_replay_t which)
{
vl_api_trace_file_header_t *hp;
int i, fd;
struct stat statb;
size_t file_size;
u8 *msg;
u8 endian_swap_needed = 0;
api_main_t *am = &api_main;
u8 *tmpbuf = 0;
u32 nitems;
void **saved_print_handlers = 0;
fd = open ((char *) filename, O_RDONLY);
if (fd < 0)
{
vlib_cli_output (vm, "Couldn't open %s\n", filename);
return;
}
if (fstat (fd, &statb) < 0)
{
vlib_cli_output (vm, "Couldn't stat %s\n", filename);
close (fd);
return;
}
if (!(statb.st_mode & S_IFREG) || (statb.st_size < sizeof (*hp)))
{
vlib_cli_output (vm, "File not plausible: %s\n", filename);
close (fd);
return;
}
file_size = statb.st_size;
file_size = (file_size + 4095) & ~(4096);
hp = mmap (0, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (hp == (vl_api_trace_file_header_t *) MAP_FAILED)
{
vlib_cli_output (vm, "mmap failed: %s\n", filename);
close (fd);
return;
}
close (fd);
if ((clib_arch_is_little_endian && hp->endian == VL_API_BIG_ENDIAN)
|| (clib_arch_is_big_endian && hp->endian == VL_API_LITTLE_ENDIAN))
endian_swap_needed = 1;
if (endian_swap_needed)
nitems = ntohl (hp->nitems);
else
nitems = hp->nitems;
if (last_index == (u32) ~ 0)
{
last_index = nitems - 1;
}
if (first_index >= nitems || last_index >= nitems)
{
vlib_cli_output (vm, "Range (%d, %d) outside file range (0, %d)\n",
first_index, last_index, nitems - 1);
munmap (hp, file_size);
return;
}
if (hp->wrapped)
vlib_cli_output (vm,
"Note: wrapped/incomplete trace, results may vary\n");
if (which == CUSTOM_DUMP)
{
saved_print_handlers = (void **) vec_dup (am->msg_print_handlers);
vl_msg_api_custom_dump_configure (am);
}
msg = (u8 *) (hp + 1);
for (i = 0; i < first_index; i++)
{
trace_cfg_t *cfgp;
int size;
u16 msg_id;
size = clib_host_to_net_u32 (*(u32 *) msg);
msg += sizeof (u32);
if (clib_arch_is_little_endian)
msg_id = ntohs (*((u16 *) msg));
else
msg_id = *((u16 *) msg);
cfgp = am->api_trace_cfg + msg_id;
if (!cfgp)
{
vlib_cli_output (vm, "Ugh: msg id %d no trace config\n", msg_id);
munmap (hp, file_size);
return;
}
msg += size;
}
if (which == REPLAY)
am->replay_in_progress = 1;
for (; i <= last_index; i++)
{
trace_cfg_t *cfgp;
u16 *msg_idp;
u16 msg_id;
int size;
if (which == DUMP)
vlib_cli_output (vm, "---------- trace %d -----------\n", i);
size = clib_host_to_net_u32 (*(u32 *) msg);
msg += sizeof (u32);
if (clib_arch_is_little_endian)
msg_id = ntohs (*((u16 *) msg));
else
msg_id = *((u16 *) msg);
cfgp = am->api_trace_cfg + msg_id;
if (!cfgp)
{
vlib_cli_output (vm, "Ugh: msg id %d no trace config\n", msg_id);
munmap (hp, file_size);
vec_free (tmpbuf);
am->replay_in_progress = 0;
return;
}
/* Copy the buffer (from the read-only mmap'ed file) */
vec_validate (tmpbuf, size - 1 + sizeof (uword));
clib_memcpy (tmpbuf + sizeof (uword), msg, size);
memset (tmpbuf, 0xf, sizeof (uword));
/*
* Endian swap if needed. All msg data is supposed to be
* in network byte order. All msg handlers are supposed to
* know that. The generic message dumpers don't know that.
* One could fix apigen, I suppose.
*/
if ((which == DUMP && clib_arch_is_little_endian) || endian_swap_needed)
{
void (*endian_fp) (void *);
if (msg_id >= vec_len (am->msg_endian_handlers)
|| (am->msg_endian_handlers[msg_id] == 0))
{
vlib_cli_output (vm, "Ugh: msg id %d no endian swap\n", msg_id);
munmap (hp, file_size);
vec_free (tmpbuf);
am->replay_in_progress = 0;
return;
}
endian_fp = am->msg_endian_handlers[msg_id];
(*endian_fp) (tmpbuf + sizeof (uword));
}
/* msg_id always in network byte order */
if (clib_arch_is_little_endian)
{
msg_idp = (u16 *) (tmpbuf + sizeof (uword));
*msg_idp = msg_id;
}
switch (which)
{
case CUSTOM_DUMP:
case DUMP:
if (msg_id < vec_len (am->msg_print_handlers) &&
am->msg_print_handlers[msg_id])
{
u8 *(*print_fp) (void *, void *);
print_fp = (void *) am->msg_print_handlers[msg_id];
(*print_fp) (tmpbuf + sizeof (uword), vm);
}
else
{
vlib_cli_output (vm, "Skipping msg id %d: no print fcn\n",
msg_id);
break;
}
break;
case INITIALIZERS:
if (msg_id < vec_len (am->msg_print_handlers) &&
am->msg_print_handlers[msg_id])
{
u8 *s;
int j;
u8 *(*print_fp) (void *, void *);
print_fp = (void *) am->msg_print_handlers[msg_id];
vlib_cli_output (vm, "/*");
(*print_fp) (tmpbuf + sizeof (uword), vm);
vlib_cli_output (vm, "*/\n");
s = format (0, "static u8 * vl_api_%s_%d[%d] = {",
am->msg_names[msg_id], i,
am->api_trace_cfg[msg_id].size);
for (j = 0; j < am->api_trace_cfg[msg_id].size; j++)
{
if ((j & 7) == 0)
s = format (s, "\n ");
s = format (s, "0x%02x,", tmpbuf[sizeof (uword) + j]);
}
s = format (s, "\n};\n%c", 0);
vlib_cli_output (vm, (char *) s);
vec_free (s);
}
break;
case REPLAY:
if (msg_id < vec_len (am->msg_print_handlers) &&
am->msg_print_handlers[msg_id] && cfgp->replay_enable)
{
void (*handler) (void *);
handler = (void *) am->msg_handlers[msg_id];
if (!am->is_mp_safe[msg_id])
vl_msg_api_barrier_sync ();
(*handler) (tmpbuf + sizeof (uword));
if (!am->is_mp_safe[msg_id])
vl_msg_api_barrier_release ();
}
else
{
if (cfgp->replay_enable)
vlib_cli_output (vm, "Skipping msg id %d: no handler\n",
msg_id);
break;
}
break;
}
_vec_len (tmpbuf) = 0;
msg += size;
}
if (saved_print_handlers)
{
clib_memcpy (am->msg_print_handlers, saved_print_handlers,
vec_len (am->msg_print_handlers) * sizeof (void *));
vec_free (saved_print_handlers);
}
munmap (hp, file_size);
vec_free (tmpbuf);
am->replay_in_progress = 0;
}
static clib_error_t *
api_trace_command_fn (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
u32 nitems = 256 << 10;
api_main_t *am = &api_main;
vl_api_trace_which_t which = VL_API_TRACE_RX;
u8 *filename;
u32 first = 0;
u32 last = (u32) ~ 0;
FILE *fp;
int rv;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "on") || unformat (input, "enable"))
{
if (unformat (input, "nitems %d", &nitems))
;
vl_msg_api_trace_configure (am, which, nitems);
vl_msg_api_trace_onoff (am, which, 1 /* on */ );
}
else if (unformat (input, "off"))
{
vl_msg_api_trace_onoff (am, which, 0);
}
else if (unformat (input, "save %s", &filename))
{
u8 *chroot_filename;
if (strstr ((char *) filename, "..")
|| index ((char *) filename, '/'))
{
vlib_cli_output (vm, "illegal characters in filename '%s'",
filename);
return 0;
}
chroot_filename = format (0, "/tmp/%s%c", filename, 0);
vec_free (filename);
fp = fopen ((char *) chroot_filename, "w");
if (fp == NULL)
{
vlib_cli_output (vm, "Couldn't create %s\n", chroot_filename);
return 0;
}
rv = vl_msg_api_trace_save (am, which, fp);
fclose (fp);
if (rv == -1)
vlib_cli_output (vm, "API Trace data not present\n");
else if (rv == -2)
vlib_cli_output (vm, "File for writing is closed\n");
else if (rv == -10)
vlib_cli_output (vm, "Error while writing header to file\n");
else if (rv == -11)
vlib_cli_output (vm, "Error while writing trace to file\n");
else if (rv == -12)
vlib_cli_output (vm,
"Error while writing end of buffer trace to file\n");
else if (rv == -13)
vlib_cli_output (vm,
"Error while writing start of buffer trace to file\n");
else if (rv < 0)
vlib_cli_output (vm, "Unkown error while saving: %d", rv);
else
vlib_cli_output (vm, "API trace saved to %s\n", chroot_filename);
vec_free (chroot_filename);
}
else if (unformat (input, "dump %s", &filename))
{
vl_msg_api_process_file (vm, filename, first, last, DUMP);
}
else if (unformat (input, "custom-dump %s", &filename))
{
vl_msg_api_process_file (vm, filename, first, last, CUSTOM_DUMP);
}
else if (unformat (input, "replay %s", &filename))
{
vl_msg_api_process_file (vm, filename, first, last, REPLAY);
}
else if (unformat (input, "initializers %s", &filename))
{
vl_msg_api_process_file (vm, filename, first, last, INITIALIZERS);
}
else if (unformat (input, "tx"))
{
which = VL_API_TRACE_TX;
}
else if (unformat (input, "first %d", &first))
{
;
}
else if (unformat (input, "last %d", &last))
{
;
}
else if (unformat (input, "status"))
{
vlib_cli_output (vm, "%U", format_vl_msg_api_trace_status,
am, which);
}
else if (unformat (input, "free"))
{
vl_msg_api_trace_onoff (am, which, 0);
vl_msg_api_trace_free (am, which);
}
else if (unformat (input, "post-mortem-on"))
vl_msg_api_post_mortem_dump_enable_disable (1 /* enable */ );
else if (unformat (input, "post-mortem-off"))
vl_msg_api_post_mortem_dump_enable_disable (0 /* enable */ );
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
}
return 0;
}
/*?
* Display, replay, or save a binary API trace
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (api_trace_command, static) =
{
.path = "api trace",
.short_help =
"api trace [on|off][dump|save|replay <file>][status][free][post-mortem-on]",
.function = api_trace_command_fn,
};
/* *INDENT-ON* */
static clib_error_t *
api_config_fn (vlib_main_t * vm, unformat_input_t * input)
{
u32 nitems = 256 << 10;
vl_api_trace_which_t which = VL_API_TRACE_RX;
api_main_t *am = &api_main;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "on") || unformat (input, "enable"))
{
if (unformat (input, "nitems %d", &nitems))
;
vl_msg_api_trace_configure (am, which, nitems);
vl_msg_api_trace_onoff (am, which, 1 /* on */ );
vl_msg_api_post_mortem_dump_enable_disable (1 /* enable */ );
}
else if (unformat (input, "save-api-table %s",
&am->save_msg_table_filename))
;
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
}
return 0;
}
/*?
* This module has three configuration parameters:
* "on" or "enable" - enables binary api tracing
* "nitems <nnn>" - sets the size of the circular buffer to <nnn>
* "save-api-table <filename>" - dumps the API message table to /tmp/<filename>
?*/
VLIB_CONFIG_FUNCTION (api_config_fn, "api-trace");
static clib_error_t *
api_queue_config_fn (vlib_main_t * vm, unformat_input_t * input)
{
api_main_t *am = &api_main;
u32 nitems;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "length %d", &nitems) ||
(unformat (input, "len %d", &nitems)))
{
if (nitems >= 1024)
am->vlib_input_queue_length = nitems;
else
clib_warning ("vlib input queue length %d too small, ignored",
nitems);
}
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
}
return 0;
}
VLIB_CONFIG_FUNCTION (api_queue_config_fn, "api-queue");
static u8 *
extract_name (u8 * s)
{
u8 *rv;
rv = vec_dup (s);
while (vec_len (rv) && rv[vec_len (rv)] != '_')
_vec_len (rv)--;
rv[vec_len (rv)] = 0;
return rv;
}
static u8 *
extract_crc (u8 * s)
{
int i;
u8 *rv;
rv = vec_dup (s);
for (i = vec_len (rv) - 1; i >= 0; i--)
{
if (rv[i] == '_')
{
vec_delete (rv, i + 1, 0);
break;
}
}
return rv;
}
typedef struct
{
u8 *name_and_crc;
u8 *name;
u8 *crc;
u32 msg_index;
int which;
} msg_table_unserialize_t;
static int
table_id_cmp (void *a1, void *a2)
{
msg_table_unserialize_t *n1 = a1;
msg_table_unserialize_t *n2 = a2;
return (n1->msg_index - n2->msg_index);
}
static int
table_name_and_crc_cmp (void *a1, void *a2)
{
msg_table_unserialize_t *n1 = a1;
msg_table_unserialize_t *n2 = a2;
return strcmp ((char *) n1->name_and_crc, (char *) n2->name_and_crc);
}
static clib_error_t *
dump_api_table_file_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
u8 *filename = 0;
api_main_t *am = &api_main;
serialize_main_t _sm, *sm = &_sm;
clib_error_t *error;
u32 nmsgs;
u32 msg_index;
u8 *name_and_crc;
int compare_current = 0;
int numeric_sort = 0;
msg_table_unserialize_t *table = 0, *item;
u32 i;
u32 ndifferences = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "file %s", &filename))
;
else if (unformat (input, "compare-current")
|| unformat (input, "compare"))
compare_current = 1;
else if (unformat (input, "numeric"))
numeric_sort = 1;
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
}
if (numeric_sort && compare_current)
return clib_error_return
(0, "Comparison and numeric sorting are incompatible");
if (filename == 0)
return clib_error_return (0, "File not specified");
/* Load the serialized message table from the table dump */
error = unserialize_open_clib_file (sm, (char *) filename);
if (error)
return error;
unserialize_integer (sm, &nmsgs, sizeof (u32));
for (i = 0; i < nmsgs; i++)
{
msg_index = unserialize_likely_small_unsigned_integer (sm);
unserialize_cstring (sm, (char **) &name_and_crc);
vec_add2 (table, item, 1);
item->msg_index = msg_index;
item->name_and_crc = name_and_crc;
item->name = extract_name (name_and_crc);
item->crc = extract_crc (name_and_crc);
item->which = 0; /* file */
}
serialize_close (sm);
/* Compare with the current image? */
if (compare_current)
{
/* Append the current message table */
u8 *tblv = vl_api_serialize_message_table (am, 0);
serialize_open_vector (sm, tblv);
unserialize_integer (sm, &nmsgs, sizeof (u32));
for (i = 0; i < nmsgs; i++)
{
msg_index = unserialize_likely_small_unsigned_integer (sm);
unserialize_cstring (sm, (char **) &name_and_crc);
vec_add2 (table, item, 1);
item->msg_index = msg_index;
item->name_and_crc = name_and_crc;
item->name = extract_name (name_and_crc);
item->crc = extract_crc (name_and_crc);
item->which = 1; /* current_image */
}
vec_free (tblv);
}
/* Sort the table. */
if (numeric_sort)
vec_sort_with_function (table, table_id_cmp);
else
vec_sort_with_function (table, table_name_and_crc_cmp);
if (compare_current)
{
ndifferences = 0;
/*
* In this case, the recovered table will have two entries per
* API message. So, if entries i and i+1 match, the message definitions
* are identical. Otherwise, the crc is different, or a message is
* present in only one of the tables.
*/
vlib_cli_output (vm, "%=60s %s", "Message Name", "Result");
for (i = 0; i < vec_len (table);)
{
/* Last message lonely? */
if (i == vec_len (table) - 1)
{
ndifferences++;
goto last_unique;
}
/* Identical pair? */
if (!strncmp
((char *) table[i].name_and_crc,
(char *) table[i + 1].name_and_crc,
vec_len (table[i].name_and_crc)))
{
i += 2;
continue;
}
ndifferences++;
/* Only in one of two tables? */
if (strncmp ((char *) table[i].name, (char *) table[i + 1].name,
vec_len (table[i].name)))
{
last_unique:
vlib_cli_output (vm, "%-60s only in %s",
table[i].name, table[i].which ?
"image" : "file");
i++;
continue;
}
/* In both tables, but with different signatures */
vlib_cli_output (vm, "%-60s definition changed", table[i].name);
i += 2;
}
if (ndifferences == 0)
vlib_cli_output (vm, "No api message signature differences found.");
else
vlib_cli_output (vm, "Found %u api message signature differences",
ndifferences);
goto cleanup;
}
/* Dump the table, sorted as shown above */
vlib_cli_output (vm, "%=60s %=8s %=10s", "Message name", "MsgID", "CRC");
for (i = 0; i < vec_len (table); i++)
{
item = table + i;
vlib_cli_output (vm, "%-60s %8u %10s", item->name,
item->msg_index, item->crc);
}
cleanup:
for (i = 0; i < vec_len (table); i++)
{
vec_free (table[i].name_and_crc);
vec_free (table[i].name);
vec_free (table[i].crc);
}
vec_free (table);
return 0;
}
/*?
* Displays a serialized API message decode table, sorted by message name
*
* @cliexpar
* @cliexstart{show api dump file <filename>}
* Message name MsgID CRC
* accept_session 407 8e2a127e
* accept_session_reply 408 67d8c22a
* add_node_next 549 e4202993
* add_node_next_reply 550 e89d6eed
* etc.
* @cliexend
?*/
/*?
* Compares a serialized API message decode table with the current image
*
* @cliexpar
* @cliexstart{show api dump file <filename> compare}
* ip_add_del_route definition changed
* ip_table_add_del definition changed
* l2_macs_event only in image
* vnet_ip4_fib_counters only in file
* vnet_ip4_nbr_counters only in file
* @cliexend
?*/
/*?
* Display a serialized API message decode table, compare a saved
* decode table with the current image, to establish API differences.
*
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (dump_api_table_file, static) =
{
.path = "show api dump",
.short_help = "show api dump file <filename> [numeric | compare-current]",
.function = dump_api_table_file_command_fn,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/