doc: add Meson coding style to contributors guide

[dpdk.git] / lib / librte_mbuf / rte_mbuf_dyn.c

diff --git a/lib/librte_mbuf/rte_mbuf_dyn.c b/lib/librte_mbuf/rte_mbuf_dyn.c
index f071651..7d5e942 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf_dyn.c
+++ b/lib/librte_mbuf/rte_mbuf_dyn.c
@@ -13,6 +13,7 @@
 #include <rte_errno.h>
 #include <rte_malloc.h>
 #include <rte_string_fns.h>
+#include <rte_bitops.h>
 #include <rte_mbuf.h>
 #include <rte_mbuf_dyn.h>
 
@@ -172,7 +173,7 @@ __mbuf_dynfield_lookup(const char *name)
                        break;
        }
 
-       if (te == NULL) {
+       if (te == NULL || mbuf_dynfield == NULL) {
                rte_errno = ENOENT;
                return NULL;
        }
@@ -185,19 +186,15 @@ rte_mbuf_dynfield_lookup(const char *name, struct rte_mbuf_dynfield *params)
 {
        struct mbuf_dynfield_elt *mbuf_dynfield;
 
-       if (shm == NULL) {
-               rte_errno = ENOENT;
-               return -1;
-       }
-
        rte_mcfg_tailq_read_lock();
-       mbuf_dynfield = __mbuf_dynfield_lookup(name);
+       if (shm == NULL && init_shared_mem() < 0)
+               mbuf_dynfield = NULL;
+       else
+               mbuf_dynfield = __mbuf_dynfield_lookup(name);
        rte_mcfg_tailq_read_unlock();
 
-       if (mbuf_dynfield == NULL) {
-               rte_errno = ENOENT;
+       if (mbuf_dynfield == NULL)
                return -1;
-       }
 
        if (params != NULL)
                memcpy(params, &mbuf_dynfield->params, sizeof(*params));
@@ -384,19 +381,15 @@ rte_mbuf_dynflag_lookup(const char *name,
 {
        struct mbuf_dynflag_elt *mbuf_dynflag;
 
-       if (shm == NULL) {
-               rte_errno = ENOENT;
-               return -1;
-       }
-
        rte_mcfg_tailq_read_lock();
-       mbuf_dynflag = __mbuf_dynflag_lookup(name);
+       if (shm == NULL && init_shared_mem() < 0)
+               mbuf_dynflag = NULL;
+       else
+               mbuf_dynflag = __mbuf_dynflag_lookup(name);
        rte_mcfg_tailq_read_unlock();
 
-       if (mbuf_dynflag == NULL) {
-               rte_errno = ENOENT;
+       if (mbuf_dynflag == NULL)
                return -1;
-       }
 
        if (params != NULL)
                memcpy(params, &mbuf_dynflag->params, sizeof(*params));
@@ -559,5 +552,62 @@ void rte_mbuf_dyn_dump(FILE *out)
                fprintf(out, "%2.2x%s", shm->free_space[i],
                        (i % 8 != 7) ? " " : "\n");
        }
+       fprintf(out, "Free bit in mbuf->ol_flags (0 = occupied, 1 = free):\n");
+       for (i = 0; i < sizeof(uint64_t) * CHAR_BIT; i++) {
+               if ((i % 8) == 0)
+                       fprintf(out, "  %4.4zx: ", i);
+               fprintf(out, "%1.1x%s", (shm->free_flags & (1ULL << i)) ? 1 : 0,
+                       (i % 8 != 7) ? " " : "\n");
+       }
+
        rte_mcfg_tailq_write_unlock();
 }
+
+static int
+rte_mbuf_dyn_timestamp_register(int *field_offset, uint64_t *flag,
+               const char *direction, const char *flag_name)
+{
+       static const struct rte_mbuf_dynfield field_desc = {
+               .name = RTE_MBUF_DYNFIELD_TIMESTAMP_NAME,
+               .size = sizeof(rte_mbuf_timestamp_t),
+               .align = __alignof__(rte_mbuf_timestamp_t),
+       };
+       struct rte_mbuf_dynflag flag_desc = {};
+       int offset;
+
+       offset = rte_mbuf_dynfield_register(&field_desc);
+       if (offset < 0) {
+               RTE_LOG(ERR, MBUF,
+                       "Failed to register mbuf field for timestamp\n");
+               return -1;
+       }
+       if (field_offset != NULL)
+               *field_offset = offset;
+
+       strlcpy(flag_desc.name, flag_name, sizeof(flag_desc.name));
+       offset = rte_mbuf_dynflag_register(&flag_desc);
+       if (offset < 0) {
+               RTE_LOG(ERR, MBUF,
+                       "Failed to register mbuf flag for %s timestamp\n",
+                       direction);
+               return -1;
+       }
+       if (flag != NULL)
+               *flag = RTE_BIT64(offset);
+
+       return 0;
+}
+
+int
+rte_mbuf_dyn_rx_timestamp_register(int *field_offset, uint64_t *rx_flag)
+{
+       return rte_mbuf_dyn_timestamp_register(field_offset, rx_flag,
+                       "Rx", RTE_MBUF_DYNFLAG_RX_TIMESTAMP_NAME);
+}
+
+int
+rte_mbuf_dyn_tx_timestamp_register(int *field_offset, uint64_t *tx_flag)
+{
+       return rte_mbuf_dyn_timestamp_register(field_offset, tx_flag,
+                       "Tx", RTE_MBUF_DYNFLAG_TX_TIMESTAMP_NAME);
+}