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authorDave Barach <dave@barachs.net>2016-12-02 13:31:25 -0500
committerDamjan Marion <dmarion.lists@gmail.com>2016-12-05 09:19:43 +0000
commit072f8debf21c786ab785ed623229935e0a6cddb6 (patch)
treebf50847f3f54f9fd1dbc2ad630b85e96160bd004 /vlib-api/vlibapi
parente3371afc8a90177eef331cf609ddd89c9413aeb5 (diff)
Variable-message-length tracing support, VPP-370
Clean up several message handlers which spuriously depended on having a vlib_main_t * pointer passed as a second argument. That definitely doesn't happen when replaying an api trace... Change-Id: Id4cf9745f770933566cb13698ee779333ee35d79 Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'vlib-api/vlibapi')
-rw-r--r--vlib-api/vlibapi/api.h8
-rw-r--r--vlib-api/vlibapi/api_shared.c47
2 files changed, 49 insertions, 6 deletions
diff --git a/vlib-api/vlibapi/api.h b/vlib-api/vlibapi/api.h
index 10ca443b434..52452526b9b 100644
--- a/vlib-api/vlibapi/api.h
+++ b/vlib-api/vlibapi/api.h
@@ -208,6 +208,14 @@ typedef struct
int is_mp_safe;
} vl_msg_api_msg_config_t;
+typedef struct msgbuf_
+{
+ unix_shared_memory_queue_t *q;
+ u32 data_len;
+ u32 pad;
+ u8 data[0];
+} msgbuf_t;
+
/* api_shared.c prototypes */
int vl_msg_api_rx_trace_enabled (api_main_t * am);
int vl_msg_api_tx_trace_enabled (api_main_t * am);
diff --git a/vlib-api/vlibapi/api_shared.c b/vlib-api/vlibapi/api_shared.c
index 2b2d81c2735..6a04fac92f4 100644
--- a/vlib-api/vlibapi/api_shared.c
+++ b/vlib-api/vlibapi/api_shared.c
@@ -21,6 +21,7 @@
#include <stdio.h>
#include <stdlib.h>
+#include <stddef.h>
#include <string.h>
#include <sys/types.h>
#include <sys/mman.h>
@@ -85,8 +86,10 @@ vl_msg_api_trace (api_main_t * am, vl_api_trace_t * tp, void *msg)
u8 **this_trace;
u8 **old_trace;
u8 *msg_copy;
+ u32 length;
trace_cfg_t *cfgp;
u16 msg_id = ntohs (*((u16 *) msg));
+ msgbuf_t *header = (msgbuf_t *) (((u8 *) msg) - offsetof (msgbuf_t, data));
cfgp = am->api_trace_cfg + msg_id;
@@ -116,8 +119,10 @@ vl_msg_api_trace (api_main_t * am, vl_api_trace_t * tp, void *msg)
this_trace = old_trace;
}
- vec_validate (msg_copy, cfgp->size - 1);
- clib_memcpy (msg_copy, msg, cfgp->size);
+ length = clib_net_to_host_u32 (header->data_len);
+
+ vec_validate (msg_copy, length - 1);
+ clib_memcpy (msg_copy, msg, length);
*this_trace = msg_copy;
}
@@ -254,6 +259,7 @@ vl_msg_api_trace_save (api_main_t * am, vl_api_trace_which_t which, FILE * fp)
*/
for (i = 0; i < vec_len (tp->traces); i++)
{
+ u32 msg_length;
/*sa_ignore NO_NULL_CHK */
msg = tp->traces[i];
/*
@@ -262,6 +268,13 @@ vl_msg_api_trace_save (api_main_t * am, vl_api_trace_which_t which, FILE * fp)
*/
if (!msg)
continue;
+
+ msg_length = clib_host_to_net_u32 (vec_len (msg));
+ if (fwrite (&msg_length, 1, sizeof (msg_length), fp)
+ != sizeof (msg_length))
+ {
+ return (-14);
+ }
if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg))
{
return (-11);
@@ -273,6 +286,7 @@ vl_msg_api_trace_save (api_main_t * am, vl_api_trace_which_t which, FILE * fp)
/* Wrap case: write oldest -> end of buffer */
for (i = tp->curindex; i < vec_len (tp->traces); i++)
{
+ u32 msg_length;
msg = tp->traces[i];
/*
* This retarded check required to pass
@@ -281,6 +295,13 @@ vl_msg_api_trace_save (api_main_t * am, vl_api_trace_which_t which, FILE * fp)
if (!msg)
continue;
+ msg_length = clib_host_to_net_u32 (vec_len (msg));
+ if (fwrite (&msg_length, 1, sizeof (msg_length), fp)
+ != sizeof (msg_length))
+ {
+ return (-14);
+ }
+
if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg))
{
return (-12);
@@ -289,6 +310,7 @@ vl_msg_api_trace_save (api_main_t * am, vl_api_trace_which_t which, FILE * fp)
/* write beginning of buffer -> oldest-1 */
for (i = 0; i < tp->curindex; i++)
{
+ u32 msg_length;
/*sa_ignore NO_NULL_CHK */
msg = tp->traces[i];
/*
@@ -298,6 +320,13 @@ vl_msg_api_trace_save (api_main_t * am, vl_api_trace_which_t which, FILE * fp)
if (!msg)
continue;
+ msg_length = clib_host_to_net_u32 (vec_len (msg));
+ if (fwrite (&msg_length, 1, sizeof (msg_length), fp)
+ != sizeof (msg_length))
+ {
+ return (-14);
+ }
+
if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg))
{
return (-13);
@@ -668,7 +697,6 @@ vl_msg_api_set_handlers (int id, char *name, void *handler, void *cleanup,
c->cleanup = cleanup;
c->endian = endian;
c->print = print;
- c->size = size;
c->traced = traced;
c->replay = 1;
c->message_bounce = 0;
@@ -759,7 +787,7 @@ vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
u8 *msg;
u8 endian_swap_needed = 0;
api_main_t *am = &api_main;
- static u8 *tmpbuf;
+ u8 *tmpbuf = 0;
u32 nitems;
void **saved_print_handlers = 0;
@@ -838,6 +866,9 @@ vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
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
@@ -850,7 +881,6 @@ vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
munmap (hp, file_size);
return;
}
- size = cfgp->size;
msg += size;
}
@@ -864,6 +894,9 @@ vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
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
@@ -874,9 +907,9 @@ vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
{
vlib_cli_output (vm, "Ugh: msg id %d no trace config\n", msg_id);
munmap (hp, file_size);
+ vec_free (tmpbuf);
return;
}
- size = cfgp->size;
/* Copy the buffer (from the read-only mmap'ed file) */
vec_validate (tmpbuf, size - 1 + sizeof (uword));
@@ -897,6 +930,7 @@ vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
{
vlib_cli_output (vm, "Ugh: msg id %d no endian swap\n", msg_id);
munmap (hp, file_size);
+ vec_free (tmpbuf);
return;
}
endian_fp = am->msg_endian_handlers[msg_id];
@@ -997,6 +1031,7 @@ vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
}
munmap (hp, file_size);
+ vec_free (tmpbuf);
}
u8 *