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authorFlorin Coras <fcoras@cisco.com>2018-11-13 15:52:38 -0800
committerDamjan Marion <dmarion@me.com>2018-11-18 19:46:38 +0000
commit053a0e44edb21713e0825f9c09ba4af12e686b38 (patch)
tree950e303daf1b367eab26cc823c0efc23ae170b1d /src/vcl
parent0c4fec0134f32bc913299b37d048a99293b1a851 (diff)
vcl/session: apps with process workers
Allow apps to register child processes as app workers. In particular, on fork vcl now registers the child process with vpp as a new worker. Change-Id: I52a65fbc3292962b1f6e1fe0f6153f739e6e0d4a Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vcl')
-rw-r--r--src/vcl/vcl_bapi.c38
-rw-r--r--src/vcl/vcl_cfg.c15
-rw-r--r--src/vcl/vcl_debug.h11
-rw-r--r--src/vcl/vcl_private.h19
-rw-r--r--src/vcl/vppcom.c79
5 files changed, 118 insertions, 44 deletions
diff --git a/src/vcl/vcl_bapi.c b/src/vcl/vcl_bapi.c
index ea8f2ce5651..7dd601cf737 100644
--- a/src/vcl/vcl_bapi.c
+++ b/src/vcl/vcl_bapi.c
@@ -148,17 +148,13 @@ vl_api_app_worker_add_del_reply_t_handler (vl_api_app_worker_add_del_reply_t *
format_api_error, ntohl (mp->retval));
goto failed;
}
- wrk_index = clib_net_to_host_u32 (mp->wrk_index);
- if (mp->context != wrk_index)
- {
- clib_warning ("VCL<%d>: wrk numbering doesn't match ours: %u, vpp: %u",
- getpid (), mp->context, wrk_index);
- goto failed;
- }
+ wrk_index = mp->context;
+ wrk = vcl_worker_get (wrk_index);
+ wrk->vpp_wrk_index = clib_net_to_host_u32 (mp->wrk_index);
+
if (!mp->is_add)
return;
- wrk = vcl_worker_get (wrk_index);
wrk->app_event_queue = uword_to_pointer (mp->app_event_queue_address,
svm_msg_q_t *);
@@ -193,6 +189,7 @@ vl_api_app_worker_add_del_reply_t_handler (vl_api_app_worker_add_del_reply_t *
goto failed;
}
vcm->app_state = STATE_APP_READY;
+ VDBG (0, "worker %u vpp-worker %u added", wrk_index, wrk->vpp_wrk_index);
return;
failed:
@@ -432,7 +429,7 @@ vcl_send_app_worker_add_del (u8 is_add)
mp->_vl_msg_id = ntohs (VL_API_APP_WORKER_ADD_DEL);
mp->client_index = vcm->my_client_index;
- mp->app_api_index = clib_host_to_net_u32 (vcm->my_client_index);
+ mp->app_api_index = clib_host_to_net_u32 (vcm->main_api_client_index);
mp->context = wrk_index;
mp->is_add = is_add;
if (!is_add)
@@ -444,6 +441,7 @@ vcl_send_app_worker_add_del (u8 is_add)
void
vppcom_send_connect_sock (vcl_session_t * session)
{
+ vcl_worker_t *wrk = vcl_worker_get_current ();
vl_api_connect_sock_t *cmp;
cmp = vl_msg_api_alloc (sizeof (*cmp));
@@ -451,7 +449,7 @@ vppcom_send_connect_sock (vcl_session_t * session)
cmp->_vl_msg_id = ntohs (VL_API_CONNECT_SOCK);
cmp->client_index = vcm->my_client_index;
cmp->context = session->session_index;
- cmp->wrk_index = vcl_get_worker_index ();
+ cmp->wrk_index = wrk->vpp_wrk_index;
cmp->is_ip4 = session->transport.is_ip4;
clib_memcpy_fast (cmp->ip, &session->transport.rmt_ip, sizeof (cmp->ip));
cmp->port = session->transport.rmt_port;
@@ -479,6 +477,7 @@ vppcom_send_disconnect_session (u64 vpp_handle)
void
vppcom_send_bind_sock (vcl_session_t * session)
{
+ vcl_worker_t *wrk = vcl_worker_get_current ();
vl_api_bind_sock_t *bmp;
/* Assumes caller has acquired spinlock: vcm->sessions_lockp */
@@ -488,7 +487,7 @@ vppcom_send_bind_sock (vcl_session_t * session)
bmp->_vl_msg_id = ntohs (VL_API_BIND_SOCK);
bmp->client_index = vcm->my_client_index;
bmp->context = session->session_index;
- bmp->wrk_index = vcl_get_worker_index ();
+ bmp->wrk_index = wrk->vpp_wrk_index;
bmp->is_ip4 = session->transport.is_ip4;
clib_memcpy_fast (bmp->ip, &session->transport.lcl_ip, sizeof (bmp->ip));
bmp->port = session->transport.lcl_port;
@@ -500,6 +499,7 @@ vppcom_send_bind_sock (vcl_session_t * session)
void
vppcom_send_unbind_sock (u64 vpp_handle)
{
+ vcl_worker_t *wrk = vcl_worker_get_current ();
vl_api_unbind_sock_t *ump;
ump = vl_msg_api_alloc (sizeof (*ump));
@@ -507,7 +507,7 @@ vppcom_send_unbind_sock (u64 vpp_handle)
ump->_vl_msg_id = ntohs (VL_API_UNBIND_SOCK);
ump->client_index = vcm->my_client_index;
- ump->wrk_index = vcl_get_worker_index ();
+ ump->wrk_index = wrk->vpp_wrk_index;
ump->handle = vpp_handle;
vl_msg_api_send_shmem (vcm->vl_input_queue, (u8 *) & ump);
}
@@ -556,15 +556,13 @@ vppcom_connect_to_vpp (char *app_name)
if (vl_socket_client_connect ((char *) vcl_cfg->vpp_api_socket_name,
app_name, 0 /* default rx/tx buffer */ ))
{
- clib_warning ("VCL<%d>: app (%s) socket connect failed!",
- getpid (), app_name);
+ VERR ("app (%s) socket connect failed!", app_name);
return VPPCOM_ECONNREFUSED;
}
if (vl_socket_client_init_shm (0))
{
- clib_warning ("VCL<%d>: app (%s) init shm failed!",
- getpid (), app_name);
+ VERR ("app (%s) init shm failed!", app_name);
return VPPCOM_ECONNREFUSED;
}
}
@@ -573,14 +571,13 @@ vppcom_connect_to_vpp (char *app_name)
if (!vcl_cfg->vpp_api_filename)
vcl_cfg->vpp_api_filename = format (0, "/vpe-api%c", 0);
- VDBG (0, "VCL<%d>: app (%s) connecting to VPP api (%s)...", getpid (),
+ VDBG (0, "app (%s) connecting to VPP api (%s)...",
app_name, vcl_cfg->vpp_api_filename);
if (vl_client_connect_to_vlib ((char *) vcl_cfg->vpp_api_filename,
app_name, vcm->cfg.vpp_api_q_length) < 0)
{
- clib_warning ("VCL<%d>: app (%s) connect failed!", getpid (),
- app_name);
+ VERR ("app (%s) connect failed!", app_name);
return VPPCOM_ECONNREFUSED;
}
@@ -590,8 +587,7 @@ vppcom_connect_to_vpp (char *app_name)
vcm->my_client_index = (u32) am->my_client_index;
vcm->app_state = STATE_APP_CONN_VPP;
- VDBG (0, "VCL<%d>: app (%s) is connected to VPP!", getpid (), app_name);
-
+ VDBG (0, "app (%s) is connected to VPP!", app_name);
vcl_evt (VCL_EVT_INIT, vcm);
return VPPCOM_OK;
}
diff --git a/src/vcl/vcl_cfg.c b/src/vcl/vcl_cfg.c
index e39e5177908..3e92941d720 100644
--- a/src/vcl/vcl_cfg.c
+++ b/src/vcl/vcl_cfg.c
@@ -22,6 +22,7 @@
static vppcom_main_t _vppcom_main = {
.debug = VPPCOM_DEBUG_INIT,
.is_init = 0,
+ .main_api_client_index = ~0,
.my_client_index = ~0
};
@@ -170,6 +171,7 @@ vppcom_cfg_heapsize (char *conf_fname)
goto defaulted;
}
}
+ free (argv[i]);
}
defaulted:
@@ -231,8 +233,7 @@ vppcom_cfg_read_file (char *conf_fname)
if (fstat (fd, &s) < 0)
{
- VCFG_DBG (0,
- "VCL<%d>: failed to stat `%s', using default configuration",
+ VCFG_DBG (0, "VCL<%d>: failed to stat `%s' using default configuration",
getpid (), conf_fname);
goto file_done;
}
@@ -254,17 +255,21 @@ vppcom_cfg_read_file (char *conf_fname)
if (unformat (line_input, "vcl {"))
{
vc_cfg_input = 1;
+ unformat_free (line_input);
continue;
}
if (vc_cfg_input)
{
- if (unformat (line_input, "heapsize %lu", &vcl_cfg->heapsize))
+ if (unformat (line_input, "heapsize %U", unformat_memory_size,
+ &vcl_cfg->heapsize))
{
VCFG_DBG (0, "VCL<%d>: configured heapsize %lu", getpid (),
vcl_cfg->heapsize);
}
- if (unformat (line_input, "max-workers %u", &vcl_cfg->max_workers))
+ else
+ if (unformat
+ (line_input, "max-workers %u", &vcl_cfg->max_workers))
{
VCFG_DBG (0, "VCL<%d>: configured max-workers %u", getpid (),
vcl_cfg->max_workers);
@@ -490,6 +495,7 @@ vppcom_cfg_read_file (char *conf_fname)
vc_cfg_input = 0;
VCFG_DBG (0, "VCL<%d>: completed parsing vppcom config!",
getpid ());
+ unformat_free (line_input);
goto input_done;
}
else
@@ -501,6 +507,7 @@ vppcom_cfg_read_file (char *conf_fname)
&line_input->buffer[line_input->index]);
}
}
+ unformat_free (line_input);
}
}
diff --git a/src/vcl/vcl_debug.h b/src/vcl/vcl_debug.h
index 7b284166503..48ff21af1de 100644
--- a/src/vcl/vcl_debug.h
+++ b/src/vcl/vcl_debug.h
@@ -23,7 +23,16 @@
#define VDBG(_lvl, _fmt, _args...) \
if (VCL_DBG_ON && vcm->debug > _lvl) \
- clib_warning ("vcl<w%d>: " _fmt, __vcl_worker_index, ##_args)
+ clib_warning ("vcl<%d:%d>: " _fmt, vcm->current_pid, \
+ __vcl_worker_index, ##_args)
+
+#define VWRN(_fmt, _args...) \
+clib_warning ("vcl<%d:%d>: " _fmt, vcm->current_pid, \
+ __vcl_worker_index, ##_args)
+
+#define VERR(_fmt, _args...) \
+ clib_warning ("vcl<%d:%d>: ERROR " _fmt, vcm->current_pid, \
+ __vcl_worker_index, ##_args)
#define foreach_vcl_dbg_evt \
_(INIT, "vcl init track") \
diff --git a/src/vcl/vcl_private.h b/src/vcl/vcl_private.h
index d1a40b933a7..7bb0dbc5a66 100644
--- a/src/vcl/vcl_private.h
+++ b/src/vcl/vcl_private.h
@@ -219,8 +219,12 @@ typedef struct vcl_worker_
/* Session pool */
vcl_session_t *sessions;
+ /** Worker/thread index in current process */
u32 wrk_index;
+ /** Worker index in vpp*/
+ u32 vpp_wrk_index;
+
/** Message queues epoll fd. Initialized only if using mqs with eventfds */
int mqs_epfd;
@@ -272,15 +276,26 @@ typedef struct vppcom_main_t_
u32 debug;
pthread_t main_cpu;
- /** VPP binary api input queue */
- svm_queue_t *vl_input_queue;
+ /** Main process pid */
+ pid_t main_pid;
+
+ /** Current pid, may be different from main_pid if forked child */
+ pid_t current_pid;
+
+ /** Main process api client index. It's used by vpp to identify the app */
+ u32 main_api_client_index;
/** API client handle */
u32 my_client_index;
+ /** VPP binary api input queue */
+ svm_queue_t *vl_input_queue;
+
/** State of the connection, shared between msg RX thread and main thread */
volatile app_state_t app_state;
+ u8 *app_name;
+
/** VCL configuration */
vppcom_cfg_t cfg;
diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 99547377523..669f04fe1e3 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -688,6 +688,52 @@ vppcom_session_disconnect (u32 session_handle)
return VPPCOM_OK;
}
+static void
+vcl_cleanup_bapi (void)
+{
+ api_main_t *am = &api_main;
+
+ am->my_client_index = ~0;
+ am->my_registration = 0;
+ am->vl_input_queue = 0;
+ am->msg_index_by_name_and_crc = 0;
+
+ vl_client_api_unmap ();
+}
+
+void
+vcl_app_fork_child_handler (void)
+{
+ u8 *child_name;
+ int rv;
+
+ vcm->current_pid = getpid ();
+ vcl_set_worker_index (0);
+
+ VDBG (0, "initializing forked child");
+ child_name = format (0, "%v-child-%u%c", vcm->app_name, getpid (), 0);
+
+ vcl_cleanup_bapi ();
+ vppcom_api_hookup ();
+ vcm->app_state = STATE_APP_START;
+ rv = vppcom_connect_to_vpp ((char *) child_name);
+ vec_free (child_name);
+ if (rv)
+ {
+ VERR ("couldn't connect to VPP!");
+ return;
+ }
+
+ vcm->app_state = STATE_APP_ADDING_WORKER;
+ vcl_send_app_worker_add_del (1 /* is_add */ );
+ if (vcl_wait_for_app_state_change (STATE_APP_READY))
+ {
+ VERR ("failed to add worker to vpp");
+ return;
+ }
+ VDBG (0, "forked child main worker initialized");
+}
+
/*
* VPPCOM Public API functions
*/
@@ -704,12 +750,15 @@ vppcom_app_create (char *app_name)
vcl_cfg = &vcm->cfg;
vcm->main_cpu = pthread_self ();
+ vcm->main_pid = vcm->current_pid = getpid ();
+ vcm->app_name = format (0, "%s", app_name);
vppcom_init_error_string_table ();
svm_fifo_segment_main_init (vcl_cfg->segment_baseva,
20 /* timeout in secs */ );
pool_init_fixed (vcm->workers, vcl_cfg->max_workers);
clib_spinlock_init (&vcm->workers_lock);
vcl_worker_alloc_and_init ();
+ pthread_atfork (NULL, NULL, vcl_app_fork_child_handler);
}
if (vcm->my_client_index == ~0)
@@ -721,31 +770,28 @@ vppcom_app_create (char *app_name)
rv = vppcom_connect_to_vpp (app_name);
if (rv)
{
- clib_warning ("VCL<%d>: ERROR: couldn't connect to VPP!",
- getpid ());
+ VERR ("couldn't connect to VPP!");
return rv;
}
-
- VDBG (0, "VCL<%d>: sending session enable", getpid ());
+ vcm->main_api_client_index = vcm->my_client_index;
+ VDBG (0, "sending session enable");
rv = vppcom_app_session_enable ();
if (rv)
{
- clib_warning ("VCL<%d>: ERROR: vppcom_app_session_enable() "
- "failed!", getpid ());
+ VERR ("vppcom_app_session_enable() failed!");
return rv;
}
- VDBG (0, "VCL<%d>: sending app attach", getpid ());
+ VDBG (0, "sending app attach");
rv = vppcom_app_attach ();
if (rv)
{
- clib_warning ("VCL<%d>: ERROR: vppcom_app_attach() failed!",
- getpid ());
+ VERR ("vppcom_app_attach() failed!");
return rv;
}
- VDBG (0, "VCL<%d>: app_name '%s', my_client_index %d (0x%x)",
- getpid (), app_name, vcm->my_client_index, vcm->my_client_index);
+ VDBG (0, "app_name '%s', my_client_index %d (0x%x)",
+ app_name, vcm->my_client_index, vcm->my_client_index);
}
return VPPCOM_OK;
@@ -760,8 +806,8 @@ vppcom_app_destroy (void)
if (vcm->my_client_index == ~0)
return;
- VDBG (0, "VCL<%d>: detaching from VPP, my_client_index %d (0x%x)",
- getpid (), vcm->my_client_index, vcm->my_client_index);
+ VDBG (0, "detaching from VPP, my_client_index %d (0x%x)",
+ vcm->my_client_index, vcm->my_client_index);
vcl_evt (VCL_EVT_DETACH, vcm);
vppcom_app_send_detach ();
@@ -770,11 +816,12 @@ vppcom_app_destroy (void)
rv = vcl_wait_for_app_state_change (STATE_APP_ENABLED);
vcm->cfg.app_timeout = orig_app_timeout;
if (PREDICT_FALSE (rv))
- VDBG (0, "VCL<%d>: application detach timed out! returning %d (%s)",
- getpid (), rv, vppcom_retval_str (rv));
+ VDBG (0, "application detach timed out! returning %d (%s)",
+ rv, vppcom_retval_str (rv));
vcl_elog_stop (vcm);
vl_client_disconnect_from_vlib ();
+ vec_free (vcm->app_name);
vcm->my_client_index = ~0;
vcm->app_state = STATE_APP_START;
}
@@ -798,7 +845,7 @@ vppcom_session_create (u8 proto, u8 is_nonblocking)
vcl_evt (VCL_EVT_CREATE, session, session_type, session->session_state,
is_nonblocking, session_index);
- VDBG (0, "VCL<%d>: sid %u", getpid (), session->session_index);
+ VDBG (0, "created sid %u", session->session_index);
return vcl_session_handle (session);
}