NEX-16712 NFS dtrace providers do not support per-share filtering
Reviewed by: Evan Layton <evan.layton@nexenta.com>
Reviewed by: Gordon Ross <gordon.ross@nexenta.com>
Reviewed by: Yuri Pankon <yuri.pankov@nexenta.com>

*** 21,30 ****
--- 21,33 ----
  
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
+ /*
+  * Copyright 2018 Nexenta Systems, Inc.  All rights reserved.
+  */
  
  #pragma D depends_on library ip.d
  #pragma D depends_on library net.d
  #pragma D depends_on module nfs
  
*** 33,42 ****
--- 36,46 ----
  
  typedef struct nfsv4opinfo {
          uint64_t noi_xid;       /* unique transation ID */
          cred_t *noi_cred;       /* credentials for operation */
          string noi_curpath;     /* current file handle path (if any) */
+         string noi_shrpath;     /* current share path */
  } nfsv4opinfo_t;
  
  typedef struct nfsv4cbinfo {
          string nci_curpath;     /* current file handle path (if any) */
  } nfsv4cbinfo_t;
*** 99,114 ****
--- 103,121 ----
  #pragma D binding "1.5" translator
  translator nfsv4opinfo_t < struct compound_state *P > {
          noi_xid = P->req->rq_xprt->xp_xid;
          noi_cred = P->basecr;
          noi_curpath = (P->vp == NULL) ? "<unknown>" : P->vp->v_path;
+         noi_shrpath = (P->exi == NULL || P->exi->exi_export.ex_path == NULL) ?
+             "<unknown>" : P->exi->exi_export.ex_path;
  };
  
  typedef struct nfsv3opinfo {
          uint64_t noi_xid;       /* unique transation ID */
          cred_t *noi_cred;       /* credentials for operation */
          string noi_curpath;     /* current file handle path (if any) */
+         string noi_shrpath;     /* current share path */
  } nfsv3opinfo_t;
  
  typedef struct nfsv3oparg nfsv3oparg_t;
  
  #pragma D binding "1.5" translator
*** 115,120 ****
--- 122,130 ----
  translator nfsv3opinfo_t < nfsv3oparg_t *P > {
          noi_xid = ((struct svc_req *)arg0)->rq_xprt->xp_xid;
          noi_cred = (cred_t *)arg1;
          noi_curpath = (arg2 == 0 || ((vnode_t *)arg2)->v_path == NULL) ?
              "<unknown>" : ((vnode_t *)arg2)->v_path;
+         noi_shrpath =
+             (arg3 == 0 || ((exportinfo_t *)arg3)->exi_export.ex_path == NULL) ?
+             "<unknown>" : ((exportinfo_t *)arg3)->exi_export.ex_path;
  };