Build provider 3rd arg from smb_request_t
hacking...
NEX-1643 dtrace provider for smbsrv
Also illumos 1841:
 DTrace smb provider was mis-implemented, doesn't exist.
Add back handlers for read/write raw, so that
 legacy dtrace consumers can find the probes.
Kill extra arg in smb_negotiate
Fix missing "done" probe with smb_notify
Add example consumer: smb-trace.d
fix soi_pid

@@ -71,21 +71,19 @@
 
         param->rw_offset = (uint64_t)off_low;
         param->rw_count = (uint32_t)count;
         param->rw_mincnt = 0;
 
-        DTRACE_SMB_2(op__Read__start, smb_request_t *, sr,
-            smb_rw_param_t *, param);
+        DTRACE_SMB_1(op__Read__start, smb_request_t *, sr); /* arg.rw */
 
         return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
 }
 
 void
 smb_post_read(smb_request_t *sr)
 {
-        DTRACE_SMB_2(op__Read__done, smb_request_t *, sr,
-            smb_rw_param_t *, sr->arg.rw);
+        DTRACE_SMB_1(op__Read__done, smb_request_t *, sr); /* arg.rw */
 
         kmem_free(sr->arg.rw, sizeof (smb_rw_param_t));
 }
 
 smb_sdrc_t

@@ -157,21 +155,19 @@
 
         param->rw_offset = (uint64_t)off_low;
         param->rw_count = (uint32_t)count;
         param->rw_mincnt = 0;
 
-        DTRACE_SMB_2(op__LockAndRead__start, smb_request_t *, sr,
-            smb_rw_param_t *, param);
+        DTRACE_SMB_1(op__LockAndRead__start, smb_request_t *, sr); /* arg.rw */
 
         return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
 }
 
 void
 smb_post_lock_and_read(smb_request_t *sr)
 {
-        DTRACE_SMB_2(op__LockAndRead__done, smb_request_t *, sr,
-            smb_rw_param_t *, sr->arg.rw);
+        DTRACE_SMB_1(op__LockAndRead__done, smb_request_t *, sr); /* arg.rw */
 
         kmem_free(sr->arg.rw, sizeof (smb_rw_param_t));
 }
 
 smb_sdrc_t

@@ -221,10 +217,65 @@
 
         return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
 }
 
 /*
+ * The SMB_COM_READ_RAW protocol was a negotiated option introduced in
+ * SMB Core Plus to maximize performance when reading a large block
+ * of data from a server.  It's obsolete and no longer supported.
+ *
+ * We keep a handler for it so the dtrace provider can see if
+ * the client tried to use this command.
+ */
+smb_sdrc_t
+smb_pre_read_raw(smb_request_t *sr)
+{
+        smb_rw_param_t *param;
+        uint32_t off_low;
+        uint32_t off_high;
+        uint32_t timeout;
+        uint16_t count;
+        int rc;
+
+        param = kmem_zalloc(sizeof (smb_rw_param_t), KM_SLEEP);
+        sr->arg.rw = param;
+        if (sr->smb_wct == 8) {
+                rc = smbsr_decode_vwv(sr, "wlwwl2.", &sr->smb_fid,
+                    &off_low, &count, &param->rw_mincnt, &timeout);
+                if (rc == 0) {
+                        param->rw_offset = (uint64_t)off_low;
+                        param->rw_count = (uint32_t)count;
+                }
+        } else {
+                rc = smbsr_decode_vwv(sr, "wlwwl2.l", &sr->smb_fid,
+                    &off_low, &count, &param->rw_mincnt, &timeout, &off_high);
+                if (rc == 0) {
+                        param->rw_offset = ((uint64_t)off_high << 32) | off_low;
+                        param->rw_count = (uint32_t)count;
+                }
+        }
+        DTRACE_SMB_1(op__ReadRaw__start, smb_request_t *, sr); /* arg.rw */
+        return (SDRC_SUCCESS);
+}
+
+void
+smb_post_read_raw(smb_request_t *sr)
+{
+        DTRACE_SMB_1(op__ReadRaw__done, smb_request_t *, sr); /* arg.rw */
+
+        kmem_free(sr->arg.rw, sizeof (smb_rw_param_t));
+}
+
+smb_sdrc_t
+smb_com_read_raw(smb_request_t *sr)
+{
+        smbsr_error(sr, NT_STATUS_NOT_SUPPORTED, ERRDOS,
+            ERROR_NOT_SUPPORTED);
+        return (SDRC_ERROR);
+}
+
+/*
  * Read bytes from a file (SMB Core).  This request was extended in
  * LM 0.12 to support 64-bit offsets, indicated by sending a wct of
  * 12 and including additional offset information.
  *
  * MS-SMB 3.3.5.7 update to LM 0.12 4.2.4:

@@ -270,21 +321,19 @@
                 param->rw_count = (uint32_t)maxcnt_low;
         }
 
         param->rw_mincnt = 0;
 
-        DTRACE_SMB_2(op__ReadX__start, smb_request_t *, sr,
-            smb_rw_param_t *, param);
+        DTRACE_SMB_1(op__ReadX__start, smb_request_t *, sr); /* arg.rw */
 
         return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
 }
 
 void
 smb_post_read_andx(smb_request_t *sr)
 {
-        DTRACE_SMB_2(op__ReadX__done, smb_request_t *, sr,
-            smb_rw_param_t *, sr->arg.rw);
+        DTRACE_SMB_1(op__ReadX__done, smb_request_t *, sr); /* arg.rw */
 
         kmem_free(sr->arg.rw, sizeof (smb_rw_param_t));
 }
 
 smb_sdrc_t