Add the tailq walk routine for debugging and other uses.
This routine will hold the read lock while walking the list.
Signed-off-by: Keith Wiles <keith.wi...@intel.com>
---
V6
Remove warning
V5
Fixup checkpatch warnings.
V4
Change function to have a return value.
to be used to stop walking or continue walking.
V3
Fix checkpatch warnings adding a commit message.
Must be using a different checkpatch then on my Ubuntu 18.04 system
V2
Fix checkpatch warnings.
lib/librte_eal/common/eal_common_tailqs.c | 20 ++++++++++++++++++++
lib/librte_eal/common/include/rte_tailq.h | 16 ++++++++++++++++
lib/librte_eal/rte_eal_version.map | 1 +
3 files changed, 37 insertions(+)
diff --git a/lib/librte_eal/common/eal_common_tailqs.c
b/lib/librte_eal/common/eal_common_tailqs.c
index babd3b30a..99e898019 100644
--- a/lib/librte_eal/common/eal_common_tailqs.c
+++ b/lib/librte_eal/common/eal_common_tailqs.c
@@ -69,6 +69,26 @@ rte_dump_tailq(FILE *f)
rte_rwlock_read_unlock(&mcfg->qlock);
}
+void
+rte_tailq_walk(int (*iter)(const struct rte_tailq_head *, void *), void *arg)
+{
+ struct rte_mem_config *mcfg;
+ unsigned int i = 0;
+
+ if (!iter)
+ return;
+ mcfg = rte_eal_get_configuration()->mem_config;
+
+ rte_rwlock_read_lock(&mcfg->qlock);
+ for (i = 0; i < RTE_MAX_TAILQ; i++) {
+ const struct rte_tailq_head *tailq = &mcfg->tailq_head[i];
+
+ if (iter(tailq, arg) < 0)
+ break;
+ }
+ rte_rwlock_read_unlock(&mcfg->qlock);
+}
+
static struct rte_tailq_head *
rte_eal_tailq_create(const char *name)
{
diff --git a/lib/librte_eal/common/include/rte_tailq.h
b/lib/librte_eal/common/include/rte_tailq.h
index 9b01abb2c..25e99658b 100644
--- a/lib/librte_eal/common/include/rte_tailq.h
+++ b/lib/librte_eal/common/include/rte_tailq.h
@@ -18,6 +18,7 @@ extern "C" {
#include <sys/queue.h>
#include <stdio.h>
#include <rte_debug.h>
+#include <rte_compat.h>
/** dummy structure type used by the rte_tailq APIs */
struct rte_tailq_entry {
@@ -85,6 +86,21 @@ struct rte_tailq_elem {
*/
void rte_dump_tailq(FILE *f);
+/**
+ * Walk the tailq list and call the Iterator function given.
+ *
+ * @param func
+ * Iterator function called for each tailq list.
+ * The rte_eal_get_configuration()->mem_config.qlock read lock is held.
+ * If Iterator returns < 0 then break out of loop.
+ * If Iterator returns 0 then continue looping.
+ * @param arg
+ * pointer to user supplied argument passed to Iterator function.
+ */
+void __rte_experimental
+ rte_tailq_walk(int (*iter)(const struct rte_tailq_head *, void *),
+ void *arg);
+
/**
* Lookup for a tail queue.
*
diff --git a/lib/librte_eal/rte_eal_version.map
b/lib/librte_eal/rte_eal_version.map
index eb5f7b9cb..288b20b0e 100644
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -364,4 +364,5 @@ EXPERIMENTAL {
rte_service_may_be_active;
rte_socket_count;
rte_socket_id_by_idx;
+ rte_tailq_walk;
};
--
2.17.1
