LU-10391 lnet: introduce struct lnet_nid

[fs/lustre-release.git] / lnet / include / uapi / linux / lnet / lnet-types.h

diff --git a/lnet/include/uapi/linux/lnet/lnet-types.h b/lnet/include/uapi/linux/lnet/lnet-types.h
index 69dc893..f00d84f 100644 (file)
--- a/lnet/include/uapi/linux/lnet/lnet-types.h
+++ b/lnet/include/uapi/linux/lnet/lnet-types.h
@@ -32,6 +32,9 @@
 #ifndef __UAPI_LNET_TYPES_H__
 #define __UAPI_LNET_TYPES_H__
 
+#include <linux/string.h>
+#include <asm/byteorder.h>
+
 /** \addtogroup lnet
  * @{ */
 
@@ -52,6 +55,15 @@
 /** wildcard PID that matches any lnet_pid_t */
 #define LNET_PID_ANY     ((lnet_pid_t) -1)
 
+static inline int LNET_NID_IS_ANY(const struct lnet_nid *nid)
+{
+       /* A NULL pointer can be used to mean "ANY" */
+       return !nid || nid->nid_type == 0xFF;
+}
+
+#define LNET_ANY_NID ((struct lnet_nid)                        \
+                     {0xFF, 0xFF, ~0, {~0, ~0, ~0, ~0} })
+
 #define LNET_PID_RESERVED 0xf0000000 /* reserved bits in PID */
 #define LNET_PID_USERFLAG 0x80000000 /* set in userspace peers */
 #define LNET_PID_LUSTRE 12345
@@ -81,7 +93,7 @@ static inline __u32 LNET_NETNUM(__u32 net)
 
 static inline __u32 LNET_NETTYP(__u32 net)
 {
-       return (net >> 16) & 0xffff;
+       return (net >> 16) & 0xff;
 }
 
 static inline __u32 LNET_MKNET(__u32 type, __u32 num)
@@ -94,6 +106,58 @@ static inline __u32 LNET_MKNET(__u32 type, __u32 num)
 
 #define LNET_NET_ANY LNET_NIDNET(LNET_NID_ANY)
 
+static inline int nid_is_nid4(const struct lnet_nid *nid)
+{
+       return NID_ADDR_BYTES(nid) == 4;
+}
+
+/* LOLND may not be defined yet, so we cannot use an inline */
+#define nid_is_lo0(__nid)                                              \
+       ((__nid)->nid_type == LOLND &&                                  \
+        nid_is_nid4(__nid) &&                                          \
+        (__nid)->nid_num == 0 &&                                       \
+        (__nid)->nid_addr[0] == 0)
+
+static inline __u32 LNET_NID_NET(const struct lnet_nid *nid)
+{
+       return LNET_MKNET(nid->nid_type, __be16_to_cpu(nid->nid_num));
+}
+
+static inline void lnet_nid4_to_nid(lnet_nid_t nid4, struct lnet_nid *nid)
+{
+       if (nid4 == LNET_NID_ANY) {
+               /* equal to setting to LNET_ANY_NID */
+               memset(nid, 0xff, sizeof(*nid));
+               return;
+       }
+
+       nid->nid_size = 0;
+       nid->nid_type = LNET_NETTYP(LNET_NIDNET(nid4));
+       nid->nid_num = __cpu_to_be16(LNET_NETNUM(LNET_NIDNET(nid4)));
+       nid->nid_addr[0] = __cpu_to_be32(LNET_NIDADDR(nid4));
+       nid->nid_addr[1] = nid->nid_addr[2] = nid->nid_addr[3] = 0;
+}
+
+static inline lnet_nid_t lnet_nid_to_nid4(const struct lnet_nid *nid)
+{
+       if (LNET_NID_IS_ANY(nid))
+               return LNET_NID_ANY;
+
+       return LNET_MKNID(LNET_NID_NET(nid), __be32_to_cpu(nid->nid_addr[0]));
+}
+
+static inline int nid_same(const struct lnet_nid *n1,
+                           const struct lnet_nid *n2)
+{
+       return n1->nid_size == n2->nid_size &&
+               n1->nid_type == n2->nid_type &&
+               n1->nid_num == n2->nid_num &&
+               n1->nid_addr[0] == n2->nid_addr[0] &&
+               n1->nid_addr[1] == n2->nid_addr[1] &&
+               n1->nid_addr[2] == n2->nid_addr[2] &&
+               n1->nid_addr[3] == n2->nid_addr[3];
+}
+
 struct lnet_counters_health {
        __u32   lch_rst_alloc;
        __u32   lch_resend_count;