NEX-16818 Add fksmbcl development tool
NEX-17264 SMB client test tp_smbutil_013 fails after NEX-14666
Reviewed by: Evan Layton <evan.layton@nexenta.com>
Reviewed by: Matt Barden <matt.barden@nexenta.com>
and: (fix ref leaks)

*** 18,34 ****
   *
   * CDDL HEADER END
   */
  
  /*
!  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #include <sys/mdb_modapi.h>
  #include <sys/types.h>
  #include <sys/refstr_impl.h>
  #include <sys/vnode.h>
  #include <sys/vfs.h>
  
  #include <smbfs/smbfs.h>
--- 18,40 ----
   *
   * CDDL HEADER END
   */
  
  /*
!  * Copyright 2017 Nexenta Systems, Inc.  All rights reserved.
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #include <sys/types.h>
+ #include <sys/mdb_modapi.h>
+ 
+ #ifdef  _USER
+ #include "../genunix/avl.h"
+ #define _FAKE_KERNEL
+ #endif
+ 
  #include <sys/refstr_impl.h>
  #include <sys/vnode.h>
  #include <sys/vfs.h>
  
  #include <smbfs/smbfs.h>
*** 147,157 ****
              NULL) != argc) {
                  return (DCMD_USAGE);
          }
  
          if (!(flags & DCMD_ADDRSPEC)) {
!                 if (mdb_walk("genunix`vfs", smbfs_vfs_cb, cbd)
                      == -1) {
                          mdb_warn("can't walk smbfs vfs");
                          return (DCMD_ERR);
                  }
                  return (DCMD_OK);
--- 153,163 ----
              NULL) != argc) {
                  return (DCMD_USAGE);
          }
  
          if (!(flags & DCMD_ADDRSPEC)) {
!                 if (mdb_walk("vfs", smbfs_vfs_cb, cbd)
                      == -1) {
                          mdb_warn("can't walk smbfs vfs");
                          return (DCMD_ERR);
                  }
                  return (DCMD_OK);
*** 236,246 ****
                  mdb_warn("expect an smbmntinfo_t addr");
                  return (DCMD_USAGE);
          }
          addr += OFFSETOF(smbmntinfo_t, smi_hash_avl);
  
!         if (mdb_pwalk("genunix`avl", smbfs_node_cb, cbd, addr) == -1) {
                  mdb_warn("cannot walk smbfs nodes");
                  return (DCMD_ERR);
          }
  
          return (DCMD_OK);
--- 242,252 ----
                  mdb_warn("expect an smbmntinfo_t addr");
                  return (DCMD_USAGE);
          }
          addr += OFFSETOF(smbmntinfo_t, smi_hash_avl);
  
!         if (mdb_pwalk("avl", smbfs_node_cb, cbd, addr) == -1) {
                  mdb_warn("cannot walk smbfs nodes");
                  return (DCMD_ERR);
          }
  
          return (DCMD_OK);
*** 265,278 ****
--- 271,333 ----
                  smbfs_node_dcmd, smbfs_node_help
          },
          {NULL}
  };
  
+ #ifdef _USER
+ /*
+  * Sadly, can't just compile ../genunix/vfs.c with this since
+  * it has become a catch-all for FS-specific headers etc.
+  */
+ int
+ vfs_walk_init(mdb_walk_state_t *wsp)
+ {
+         if (wsp->walk_addr == NULL &&
+             mdb_readvar(&wsp->walk_addr, "rootvfs") == -1) {
+                 mdb_warn("failed to read 'rootvfs'");
+                 return (WALK_ERR);
+         }
+ 
+         wsp->walk_data = (void *)wsp->walk_addr;
+         return (WALK_NEXT);
+ }
+ 
+ int
+ vfs_walk_step(mdb_walk_state_t *wsp)
+ {
+         vfs_t vfs;
+         int status;
+ 
+         if (mdb_vread(&vfs, sizeof (vfs), wsp->walk_addr) == -1) {
+                 mdb_warn("failed to read vfs_t at %p", wsp->walk_addr);
+                 return (WALK_DONE);
+         }
+ 
+         status = wsp->walk_callback(wsp->walk_addr, &vfs, wsp->walk_cbdata);
+ 
+         if (vfs.vfs_next == wsp->walk_data)
+                 return (WALK_DONE);
+ 
+         wsp->walk_addr = (uintptr_t)vfs.vfs_next;
+ 
+         return (status);
+ }
+ #endif  // _USER
+ 
  static const mdb_walker_t walkers[] = {
+ #ifdef  _USER
+         /* from avl.c */
+         { AVL_WALK_NAME, AVL_WALK_DESC,
+                 avl_walk_init, avl_walk_step, avl_walk_fini },
+         /* from vfs.c */
+         { "vfs", "walk file system list",
+                 vfs_walk_init, vfs_walk_step },
+ #endif  // _USER
          {NULL}
  };
  
+ 
  static const mdb_modinfo_t modinfo = {
          MDB_API_VERSION,
          dcmds,
          walkers
  };