LU-13127 ptlrpc: don't require CONFIG_CRYPTO_CRC32

[fs/lustre-release.git] / lustre / ptlrpc / pack_generic.c

diff --git a/lustre/ptlrpc/pack_generic.c b/lustre/ptlrpc/pack_generic.c
index 973e3f0..0e382c4 100644 (file)
--- a/lustre/ptlrpc/pack_generic.c
+++ b/lustre/ptlrpc/pack_generic.c
@@ -40,6 +40,10 @@
 
 #define DEBUG_SUBSYSTEM S_RPC
 
+#ifndef CONFIG_CRYPTO_CRC32
+#include <linux/crc32.h>
+#endif
+
 #include <libcfs/libcfs.h>
 
 #include <llog_swab.h>
@@ -1374,20 +1378,23 @@ __u64 lustre_msg_get_mbits(struct lustre_msg *msg)
        }
 }
 
-__u32 lustre_msg_calc_cksum(struct lustre_msg *msg)
+__u32 lustre_msg_calc_cksum(struct lustre_msg *msg, __u32 buf)
 {
        switch (msg->lm_magic) {
        case LUSTRE_MSG_MAGIC_V2: {
-               struct ptlrpc_body *pb = lustre_msg_ptlrpc_body(msg);
-               __u32 len = lustre_msg_buflen(msg, MSG_PTLRPC_BODY_OFF);
-
-               unsigned int hsize = 4;
+               struct ptlrpc_body *pb = lustre_msg_buf_v2(msg, buf, 0);
+               __u32 len = lustre_msg_buflen(msg, buf);
                __u32 crc;
 
                LASSERTF(pb != NULL, "invalid msg %p: no ptlrpc body!\n", msg);
+#ifdef CONFIG_CRYPTO_CRC32
+               unsigned int hsize = 4;
                cfs_crypto_hash_digest(CFS_HASH_ALG_CRC32, (unsigned char *)pb,
                                       len, NULL, 0, (unsigned char *)&crc,
                                       &hsize);
+#else
+               crc = crc32_le(~(__u32)0, (unsigned char *)pb, len);
+#endif
                return crc;
        }
        default: