[ofa-general] [PATCH] libibmad: remove functions which use pthread
Sasha Khapyorsky
sashak at voltaire.com
Wed Dec 31 09:04:13 PST 2008
I looked at implementation of safe_*() functions (safe_smp_query,
safe_smp_set and safe_ca_call) and found that they are not actually
"safe" as declared by its names. The only thread-unsafe thing which
is used there is static 'mad_portid' structure (from rpc.c), but
modification of this structure is not protected by same mutex (actually
not protected at all).
As far as I know nothing uses those safe_*() primitives right now outside
libibmad, so I think it is better to remove this confused functions from
API (with changing library version, etc.).
The primitives madrpc_lock() and madrpc_unlock() are just wrappers to
hidden static pthread mutex which is not controlled by caller
application. I think that it will be more robust for multithreaded
application to use its own synchronization methods (pthread mutex or any
other) for better control. So let's remove madrpc_lock/unlock() too.
Signed-off-by: Sasha Khapyorsky <sashak at voltaire.com>
---
libibmad/include/infiniband/mad.h | 41 -------------------------------------
libibmad/libibmad.ver | 2 +-
libibmad/src/libibmad.map | 2 -
libibmad/src/rpc.c | 15 -------------
libibmad/src/sa.c | 5 ++-
5 files changed, 4 insertions(+), 61 deletions(-)
diff --git a/libibmad/include/infiniband/mad.h b/libibmad/include/infiniband/mad.h
index eff6738..89b4be5 100644
--- a/libibmad/include/infiniband/mad.h
+++ b/libibmad/include/infiniband/mad.h
@@ -703,8 +703,6 @@ void * madrpc_rmpp(ib_rpc_t *rpc, ib_portid_t *dport, ib_rmpp_hdr_t *rmpp,
void madrpc_init(char *dev_name, int dev_port, int *mgmt_classes,
int num_classes);
void madrpc_save_mad(void *madbuf, int len);
-void madrpc_lock(void);
-void madrpc_unlock(void);
void madrpc_show_errors(int set);
void * mad_rpc_open_port(char *dev_name, int dev_port, int *mgmt_classes,
@@ -725,32 +723,6 @@ uint8_t * smp_query_via(void *buf, ib_portid_t *id, unsigned attrid,
uint8_t * smp_set_via(void *buf, ib_portid_t *id, unsigned attrid, unsigned mod,
unsigned timeout, const void *srcport);
-inline static uint8_t *
-safe_smp_query(void *rcvbuf, ib_portid_t *portid, unsigned attrid, unsigned mod,
- unsigned timeout)
-{
- uint8_t *p;
-
- madrpc_lock();
- p = smp_query(rcvbuf, portid, attrid, mod, timeout);
- madrpc_unlock();
-
- return p;
-}
-
-inline static uint8_t *
-safe_smp_set(void *rcvbuf, ib_portid_t *portid, unsigned attrid, unsigned mod,
- unsigned timeout)
-{
- uint8_t *p;
-
- madrpc_lock();
- p = smp_set(rcvbuf, portid, attrid, mod, timeout);
- madrpc_unlock();
-
- return p;
-}
-
/* sa.c */
uint8_t * sa_call(void *rcvbuf, ib_portid_t *portid, ib_sa_call_t *sa,
unsigned timeout);
@@ -761,19 +733,6 @@ int ib_path_query(ibmad_gid_t srcgid, ibmad_gid_t destgid, ib_portid_t *sm_id,
int ib_path_query_via(const void *srcport, ibmad_gid_t srcgid,
ibmad_gid_t destgid, ib_portid_t *sm_id, void *buf);
-inline static uint8_t *
-safe_sa_call(void *rcvbuf, ib_portid_t *portid, ib_sa_call_t *sa,
- unsigned timeout)
-{
- uint8_t *p;
-
- madrpc_lock();
- p = sa_call(rcvbuf, portid, sa, timeout);
- madrpc_unlock();
-
- return p;
-}
-
/* resolve.c */
int ib_resolve_smlid(ib_portid_t *sm_id, int timeout);
int ib_resolve_guid(ib_portid_t *portid, uint64_t *guid,
diff --git a/libibmad/libibmad.ver b/libibmad/libibmad.ver
index 7e93c16..23d2dc2 100644
--- a/libibmad/libibmad.ver
+++ b/libibmad/libibmad.ver
@@ -6,4 +6,4 @@
# API_REV - advance on any added API
# RUNNING_REV - advance any change to the vendor files
# AGE - number of backward versions the API still supports
-LIBVERSION=5:0:4
+LIBVERSION=2:0:0
diff --git a/libibmad/src/libibmad.map b/libibmad/src/libibmad.map
index 927e51c..f944d86 100644
--- a/libibmad/src/libibmad.map
+++ b/libibmad/src/libibmad.map
@@ -72,14 +72,12 @@ IBMAD_1.3 {
madrpc;
madrpc_def_timeout;
madrpc_init;
- madrpc_lock;
madrpc_portid;
madrpc_rmpp;
madrpc_save_mad;
madrpc_set_retries;
madrpc_set_timeout;
madrpc_show_errors;
- madrpc_unlock;
ib_path_query;
sa_call;
sa_rpc_call;
diff --git a/libibmad/src/rpc.c b/libibmad/src/rpc.c
index 5226540..670a936 100644
--- a/libibmad/src/rpc.c
+++ b/libibmad/src/rpc.c
@@ -38,7 +38,6 @@
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
-#include <pthread.h>
#include <string.h>
#include <errno.h>
@@ -286,20 +285,6 @@ madrpc_rmpp(ib_rpc_t *rpc, ib_portid_t *dport, ib_rmpp_hdr_t *rmpp, void *data)
return mad_rpc_rmpp(&port, rpc, dport, rmpp, data);
}
-static pthread_mutex_t rpclock = PTHREAD_MUTEX_INITIALIZER;
-
-void
-madrpc_lock(void)
-{
- pthread_mutex_lock(&rpclock);
-}
-
-void
-madrpc_unlock(void)
-{
- pthread_mutex_unlock(&rpclock);
-}
-
void
madrpc_init(char *dev_name, int dev_port, int *mgmt_classes, int num_classes)
{
diff --git a/libibmad/src/sa.c b/libibmad/src/sa.c
index 27b9d52..c601254 100644
--- a/libibmad/src/sa.c
+++ b/libibmad/src/sa.c
@@ -132,7 +132,7 @@ ib_path_query_via(const void *srcport, ibmad_gid_t srcgid, ibmad_gid_t destgid,
if (srcport) {
p = sa_rpc_call (srcport, buf, sm_id, &sa, 0);
} else {
- p = safe_sa_call(buf, sm_id, &sa, 0);
+ p = sa_call(buf, sm_id, &sa, 0);
}
if (!p) {
IBWARN("sa call path_query failed");
@@ -142,8 +142,9 @@ ib_path_query_via(const void *srcport, ibmad_gid_t srcgid, ibmad_gid_t destgid,
mad_decode_field(p, IB_SA_PR_DLID_F, &dlid);
return dlid;
}
+
int
ib_path_query(ibmad_gid_t srcgid, ibmad_gid_t destgid, ib_portid_t *sm_id, void *buf)
{
- return ib_path_query_via (NULL, srcgid, destgid, sm_id, buf);
+ return ib_path_query_via(NULL, srcgid, destgid, sm_id, buf);
}
--
1.6.0.4.766.g6fc4a
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