[bacula/bacula] / bacula / src / filed / xattr.c

/*
   Bacula® - The Network Backup Solution

   Copyright (C) 2008-2009 Free Software Foundation Europe e.V.

   The main author of Bacula is Kern Sibbald, with contributions from
   many others, a complete list can be found in the file AUTHORS.
   This program is Free Software; you can redistribute it and/or
   modify it under the terms of version two of the GNU General Public
   License as published by the Free Software Foundation and included
   in the file LICENSE.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.

   Bacula® is a registered trademark of Kern Sibbald.
   The licensor of Bacula is the Free Software Foundation Europe
   (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
   Switzerland, email:ftf@fsfeurope.org.
*/
/*
 * Functions to handle Extended Attributes for bacula.
 *
 * Extended Attributes are so OS specific we only restore Extended Attributes if
 * they were saved using a filed on the same platform.
 *
 * Currently we support the following OSes:
 *   - FreeBSD (Extended Attributes)
 *   - Darwin (Extended Attributes)
 *   - Linux (Extended Attributes)
 *   - NetBSD (Extended Attributes)
 *   - Solaris (Extended Attributes and Extensible Attributes)
 *
 *   Written by Marco van Wieringen, November MMVIII
 *
 *   Version $Id$
 */

#include "bacula.h"
#include "filed.h"
#include "xattr.h"

#if !defined(HAVE_XATTR)
/*
 * Entry points when compiled without support for XATTRs or on an unsupported platform.
 */
bxattr_exit_code build_xattr_streams(JCR *jcr, FF_PKT *ff_pkt)
{
   return bxattr_exit_fatal;
}

bxattr_exit_code parse_xattr_streams(JCR *jcr, int stream)
{
   return bxattr_exit_fatal;
}
#else
/*
 * Send a XATTR stream to the SD.
 */
static bxattr_exit_code send_xattr_stream(JCR *jcr, int stream)
{
   BSOCK *sd = jcr->store_bsock;
   POOLMEM *msgsave;
#ifdef FD_NO_SEND_TEST
   return bxattr_exit_ok;
#endif

   /*
    * Sanity check
    */
   if (jcr->xattr_data_len <= 0)
      return bxattr_exit_ok;

   /*
    * Send header
    */
   if (!sd->fsend("%ld %d 0", jcr->JobFiles, stream)) {
      Jmsg1(jcr, M_FATAL, 0, _("Network send error to SD. ERR=%s\n"),
            sd->bstrerror());
      return bxattr_exit_fatal;
   }

   /*
    * Send the buffer to the storage deamon
    */
   Dmsg1(400, "Backing up XATTR <%s>\n", jcr->xattr_data);
   msgsave = sd->msg;
   sd->msg = jcr->xattr_data;
   sd->msglen = jcr->xattr_data_len;
   if (!sd->send()) {
      sd->msg = msgsave;
      sd->msglen = 0;
      Jmsg1(jcr, M_FATAL, 0, _("Network send error to SD. ERR=%s\n"),
            sd->bstrerror());
      return bxattr_exit_fatal;
   }

   jcr->JobBytes += sd->msglen;
   sd->msg = msgsave;
   if (!sd->signal(BNET_EOD)) {
      Jmsg1(jcr, M_FATAL, 0, _("Network send error to SD. ERR=%s\n"),
            sd->bstrerror());
      return bxattr_exit_fatal;
   }
   Dmsg1(200, "XATTR of file: %s successfully backed up!\n", jcr->last_fname);
   return bxattr_exit_ok;
}

/*
 * This is a supported OS, See what kind of interface we should use.
 * Start with the generic interface used by most OS-es.
 */
#if defined(HAVE_DARWIN_OS) || \
    defined(HAVE_FREEBSD_OS) || \
    defined(HAVE_LINUX_OS) || \
    defined(HAVE_NETBSD_OS)
       
#ifdef HAVE_SYS_XATTR_H
#include <sys/xattr.h>
#endif

/*
 * Define the supported XATTR streams for this OS
 */
#if defined(HAVE_DARWIN_OS)
static int os_default_xattr_streams[1] = { STREAM_XATTR_DARWIN };
#elif defined(HAVE_FREEBSD_OS)
static int os_default_xattr_streams[1] = { STREAM_XATTR_FREEBSD };
#elif defined(HAVE_LINUX_OS)
static int os_default_xattr_streams[1] = { STREAM_XATTR_LINUX };
#elif defined(HAVE_NETBSD_OS)
static int os_default_xattr_streams[1] = { STREAM_XATTR_NETBSD };
#endif

/*
 * OSX doesn't have llistxattr, lgetxattr and lsetxattr but has
 * listxattr, getxattr and setxattr with an extra options argument
 * which mimics the l variants of the functions when we specify
 * XATTR_NOFOLLOW as the options value.
 */
#if defined(HAVE_DARWIN_OS)
   #define llistxattr(path, list, size) listxattr((path), (list), (size), XATTR_NOFOLLOW)
   #define lgetxattr(path, name, value, size) getxattr((path), (name), (value), (size), 0, XATTR_NOFOLLOW)
   #define lsetxattr(path, name, value, size, flags) setxattr((path), (name), (value), (size), (flags), XATTR_NOFOLLOW)
#else
   /*
    * Fallback to the non l-functions when those are not available.
    */
   #if defined(HAVE_GETXATTR) && !defined(HAVE_LGETXATTR)
   #define lgetxattr getxattr
   #endif
   #if defined(HAVE_SETXATTR) && !defined(HAVE_LSETXATTR)
   #define lsetxattr setxattr
   #endif
   #if defined(HAVE_LISTXATTR) && !defined(HAVE_LLISTXATTR)
   #define llistxattr listxattr
   #endif
#endif

static void xattr_drop_internal_table(xattr_t *xattr_value_list)
{
   xattr_t *current_xattr;

   /*
    * Walk the list of xattrs and free allocated memory on traversing.
    */
   for (current_xattr = xattr_value_list;
        current_xattr != (xattr_t *)NULL;
        current_xattr++) {
      /*
       * See if we can shortcut.
       */
      if (current_xattr->magic != XATTR_MAGIC)
         break;

      free(current_xattr->name);

      if (current_xattr->value_length > 0)
         free(current_xattr->value);
   }

   /*
    * Free the array of control structs.
    */
   free(xattr_value_list);
}

/*
 * The xattr stream for OSX, FreeBSD, Linux and NetBSD is a serialized stream of bytes
 * which encodes one or more xattr_t structures.
 *
 * The Serialized stream consists of the following elements:
 *    magic - A magic string which makes it easy to detect any binary incompatabilites
 *    name_length - The length of the following xattr name
 *    name - The name of the extended attribute
 *    value_length - The length of the following xattr data
 *    value - The actual content of the extended attribute
 *
 * This is repeated 1 or more times.
 * 
 */
static uint32_t serialize_xattr_stream(JCR *jcr, uint32_t expected_serialize_len, xattr_t *xattr_value_list)
{
   xattr_t *current_xattr;
   ser_declare;

   /*
    * Make sure the serialized stream fits in the poolmem buffer.
    * We allocate some more to be sure the stream is gonna fit.
    */
   jcr->xattr_data = check_pool_memory_size(jcr->xattr_data, expected_serialize_len + 10);
   ser_begin(jcr->xattr_data, expected_serialize_len + 10);

   /*
    * Walk the list of xattrs and serialize the data.
    */
   for (current_xattr = xattr_value_list; current_xattr != (xattr_t *)NULL; current_xattr++) {
      /*
       * See if we can shortcut.
       */
      if (current_xattr->magic != XATTR_MAGIC)
         break;

      ser_uint32(current_xattr->magic);
      ser_uint32(current_xattr->name_length);
      ser_bytes(current_xattr->name, current_xattr->name_length);

      ser_uint32(current_xattr->value_length);
      ser_bytes(current_xattr->value, current_xattr->value_length);
   }

   ser_end(jcr->xattr_data, expected_serialize_len + 10);
   jcr->xattr_data_len = ser_length(jcr->xattr_data);
   return jcr->xattr_data_len;
}

static bxattr_exit_code generic_xattr_build_streams(JCR *jcr, FF_PKT *ff_pkt)
{
   int count = 0;
   int32_t xattr_list_len,
           xattr_value_len;
   uint32_t expected_serialize_len = 0;
   char *xattr_list, *bp;
   xattr_t *xattr_value_list = NULL, *current_xattr;
   bxattr_exit_code retval = bxattr_exit_error;
   berrno be;

   /*
    * First get the length of the available list with extended attributes.
    */
   xattr_list_len = llistxattr(jcr->last_fname, NULL, 0);
   if (xattr_list_len < 0) {
      switch (errno) {
      case ENOENT:
         return bxattr_exit_ok;
      default:
         Mmsg2(jcr->errmsg, _("llistxattr error on file \"%s\": ERR=%s\n"),
               jcr->last_fname, be.bstrerror());
         Dmsg2(100, "llistxattr error file=%s ERR=%s\n",
               jcr->last_fname, be.bstrerror());
         return bxattr_exit_error;
      }
   } else if (xattr_list_len == 0) {
      return bxattr_exit_ok;
   }

   /*
    * Allocate room for the extented attribute list.
    */
   xattr_list = (char *)malloc(xattr_list_len + 1);
   memset((caddr_t)xattr_list, 0, xattr_list_len + 1);

   /*
    * Get the actual list of extended attributes names for a file.
    */
   xattr_list_len = llistxattr(jcr->last_fname, xattr_list, xattr_list_len);
   if (xattr_list_len < 0) {
      switch (errno) {
      case ENOENT:
         retval = bxattr_exit_ok;
         goto bail_out;
      default:
         Mmsg2(jcr->errmsg, _("llistxattr error on file \"%s\": ERR=%s\n"),
               jcr->last_fname, be.bstrerror());
         Dmsg2(100, "llistxattr error file=%s ERR=%s\n",
               jcr->last_fname, be.bstrerror());
         goto bail_out;
      }
   }
   xattr_list[xattr_list_len] = '\0';

   /*
    * Count the number of extended attributes on a file.
    */
   bp = xattr_list;
   while ((bp - xattr_list) + 1 < xattr_list_len) {
#if defined(HAVE_LINUX_OS)
      /*
       * On Linux you also get the acls in the extented attribute list.
       * So we check if we are already backing up acls and if we do we
       * don't store the extended attribute with the same info.
       */
      if ((ff_pkt->flags & FO_ACL) == 0 || strcmp(bp, "system.posix_acl_access"))
         count++;
#else
      count++;
#endif

      bp = strchr(bp, '\0') + 1;
   }

   if (count == 0) {
      retval = bxattr_exit_ok;
      goto bail_out;
   }

   /*
    * Allocate enough room to hold all extended attributes.
    * After allocating the storage make sure its empty by zeroing it.
    */
   xattr_value_list = (xattr_t *)malloc(count * sizeof(xattr_t));
   memset((caddr_t)xattr_value_list, 0, count * sizeof(xattr_t));

   /*
    * Walk the list of extended attributes names and retrieve the data.
    * We already count the bytes needed for serializing the stream later on.
    */
   current_xattr = xattr_value_list;
   bp = xattr_list;
   while ((bp - xattr_list) + 1 < xattr_list_len) {
#if defined(HAVE_LINUX_OS)
      /*
       * On Linux you also get the acls in the extented attribute list.
       * So we check if we are already backing up acls and if we do we
       * don't store the extended attribute with the same info.
       */
      if (ff_pkt->flags & FO_ACL && !strcmp(bp, "system.posix_acl_access")) {
         bp = strchr(bp, '\0') + 1;
         continue;
      }
#endif

      /*
       * Each xattr valuepair starts with a magic so we can parse it easier.
       */
      current_xattr->magic = XATTR_MAGIC;
      expected_serialize_len += sizeof(current_xattr->magic);

      /*
       * Allocate space for storing the name.
       */
      current_xattr->name_length = strlen(bp);
      current_xattr->name = (char *)malloc(current_xattr->name_length);
      memcpy((caddr_t)current_xattr->name, (caddr_t)bp, current_xattr->name_length);

      expected_serialize_len += sizeof(current_xattr->name_length) + current_xattr->name_length;

      /*
       * First see how long the value is for the extended attribute.
       */
      xattr_value_len = lgetxattr(jcr->last_fname, bp, NULL, 0);
      if (xattr_value_len < 0) {
         switch (errno) {
         case ENOENT:
            retval = bxattr_exit_ok;
            goto bail_out;
         default:
            Mmsg2(jcr->errmsg, _("lgetxattr error on file \"%s\": ERR=%s\n"),
                  jcr->last_fname, be.bstrerror());
            Dmsg2(100, "lgetxattr error file=%s ERR=%s\n",
                  jcr->last_fname, be.bstrerror());
            goto bail_out;
         }
      }

      /*
       * Allocate space for storing the value.
       */
      current_xattr->value = (char *)malloc(xattr_value_len);
      memset((caddr_t)current_xattr->value, 0, xattr_value_len);

      xattr_value_len = lgetxattr(jcr->last_fname, bp, current_xattr->value, xattr_value_len);
      if (xattr_value_len < 0) {
         switch (errno) {
         case ENOENT:
            retval = bxattr_exit_ok;
            goto bail_out;
         default:
            Mmsg2(jcr->errmsg, _("lgetxattr error on file \"%s\": ERR=%s\n"),
                  jcr->last_fname, be.bstrerror());
            Dmsg2(100, "lgetxattr error file=%s ERR=%s\n",
                  jcr->last_fname, be.bstrerror());
            goto bail_out;
         }
      }

      /*
       * Store the actual length of the value.
       */
      current_xattr->value_length = xattr_value_len;
      expected_serialize_len += sizeof(current_xattr->value_length) + current_xattr->value_length;

      /*
       * Protect ourself against things getting out of hand.
       */
      if (expected_serialize_len >= MAX_XATTR_STREAM) {
         Mmsg2(jcr->errmsg, _("Xattr stream on file \"%s\" exceeds maximum size of %d bytes\n"),
               jcr->last_fname, MAX_XATTR_STREAM);
         goto bail_out;
      }
      
      /*
       * Next attribute.
       */
      current_xattr++;
      bp = strchr(bp, '\0') + 1;
   }

   /*
    * Serialize the datastream.
    */
   if (serialize_xattr_stream(jcr, expected_serialize_len, xattr_value_list) < expected_serialize_len) {
      Mmsg1(jcr->errmsg, _("Failed to serialize extended attributes on file \"%s\"\n"),
            jcr->last_fname);
      Dmsg1(100, "Failed to serialize extended attributes on file \"%s\"\n",
            jcr->last_fname);
      goto bail_out;
   }

   xattr_drop_internal_table(xattr_value_list);
   free(xattr_list);

   /*
    * Send the datastream to the SD.
    */
   return send_xattr_stream(jcr, os_default_xattr_streams[0]);

bail_out:
   if (xattr_value_list) {
      xattr_drop_internal_table(xattr_value_list);
   }
   free(xattr_list);
   return retval;
}

static bxattr_exit_code generic_xattr_parse_streams(JCR *jcr, int stream)
{
   unser_declare;
   xattr_t current_xattr;
   bxattr_exit_code retval = bxattr_exit_ok;
   berrno be;

   /*
    * Parse the stream and perform the setxattr calls on the file.
    *
    * Start unserializing the data. We keep on looping while we have not
    * unserialized all bytes in the stream.
    */
   unser_begin(jcr->xattr_data, jcr->xattr_data_len);
   while (unser_length(jcr->xattr_data) < jcr->xattr_data_len) {
      /*
       * First make sure the magic is present. This way we can easily catch corruption.
       * Any missing MAGIC is fatal we do NOT try to continue.
       */
      unser_uint32(current_xattr.magic);
      if (current_xattr.magic != XATTR_MAGIC) {
         Mmsg1(jcr->errmsg, _("Illegal xattr stream, no XATTR_MAGIC on file \"%s\"\n"),
               jcr->last_fname);
         Dmsg1(100, "Illegal xattr stream, no XATTR_MAGIC on file \"%s\"\n",
               jcr->last_fname);
         return bxattr_exit_error;
      }

      /*
       * Decode the valuepair. First decode the length of the name.
       */
      unser_uint32(current_xattr.name_length);
      
      /*
       * Allocate room for the name and decode its content.
       */
      current_xattr.name = (char *)malloc(current_xattr.name_length + 1);
      unser_bytes(current_xattr.name, current_xattr.name_length);

      /*
       * The xattr_name needs to be null terminated for lsetxattr.
       */
      current_xattr.name[current_xattr.name_length] = '\0';

      /*
       * Decode the value length.
       */
      unser_uint32(current_xattr.value_length);

      /*
       * Allocate room for the value and decode its content.
       */
      current_xattr.value = (char *)malloc(current_xattr.value_length);
      unser_bytes(current_xattr.value, current_xattr.value_length);

      /*
       * Try to set the extended attribute on the file.
       * If we fail to set this attribute we flag the error but its not fatal,
       * we try to restore the other extended attributes too.
       */
      if (lsetxattr(jcr->last_fname, current_xattr.name, current_xattr.value,
                    current_xattr.value_length, 0) != 0) {
         switch (errno) {
         case ENOENT:
            break;
         default:
            Mmsg2(jcr->errmsg, _("lsetxattr error on file \"%s\": ERR=%s\n"),
                  jcr->last_fname, be.bstrerror());
            Dmsg2(100, "lsetxattr error file=%s ERR=%s\n",
                  jcr->last_fname, be.bstrerror());
            retval = bxattr_exit_error;
            break;
         }
      }

      /*
       * Free the temporary buffers.
       */
      free(current_xattr.name);
      free(current_xattr.value);
   }

   unser_end(jcr->xattr_data, jcr->xattr_data_len);
   return retval;
}

/*
 * For all these os-es setup the build and parse function pointer to the generic functions.
 */
static bxattr_exit_code (*os_build_xattr_streams)(JCR *jcr, FF_PKT *ff_pkt) = generic_xattr_build_streams;
static bxattr_exit_code (*os_parse_xattr_streams)(JCR *jcr, int stream) = generic_xattr_parse_streams;

#elif defined(HAVE_SUN_OS)
/*
 * Solaris extended attributes were introduced in Solaris 9
 * by PSARC 1999/209
 *
 * Solaris extensible attributes were introduced in OpenSolaris
 * by PSARC 2007/315 Solaris extensible attributes are also
 * sometimes called extended system attributes.
 *
 * man fsattr(5) on Solaris gives a wealth of info. The most
 * important bits are:
 *
 * Attributes are logically supported as files within the  file
 * system.   The  file  system  is  therefore augmented with an
 * orthogonal name space of file attributes. Any file  (includ-
 * ing  attribute files) can have an arbitrarily deep attribute
 * tree associated with it. Attribute values  are  accessed  by
 * file descriptors obtained through a special attribute inter-
 * face.  This logical view of "attributes as files" allows the
 * leveraging  of  existing file system interface functionality
 * to support the construction, deletion, and  manipulation  of
 * attributes.
 *
 * The special files  "."  and  ".."  retain  their  accustomed
 * semantics within the attribute hierarchy.  The "." attribute
 * file refers to the current directory and the ".."  attribute
 * file  refers to the parent directory.  The unnamed directory
 * at the head of each attribute tree is considered the "child"
 * of  the  file it is associated with and the ".." file refers
 * to the associated file.  For  any  non-directory  file  with
 * attributes,  the  ".." entry in the unnamed directory refers
 * to a file that is not a directory.
 *
 * Conceptually, the attribute model is fully general. Extended
 * attributes  can  be  any  type of file (doors, links, direc-
 * tories, and so forth) and can even have their own attributes
 * (fully  recursive).   As a result, the attributes associated
 * with a file could be an arbitrarily deep directory hierarchy
 * where each attribute could have an equally complex attribute
 * tree associated with it.  Not all implementations  are  able
 * to,  or  want to, support the full model. Implementation are
 * therefore permitted to reject operations that are  not  sup-
 * ported.   For  example,  the implementation for the UFS file
 * system allows only regular files as attributes (for example,
 * no sub-directories) and rejects attempts to place attributes
 * on attributes.
 *
 * The following list details the operations that are  rejected
 * in the current implementation:
 *
 * link                     Any attempt to create links between
 *                          attribute  and  non-attribute space
 *                          is rejected  to  prevent  security-
 *                          related   or   otherwise  sensitive
 *                          attributes from being exposed,  and
 *                          therefore  manipulable,  as regular
 *                          files.
 *
 * rename                   Any  attempt  to   rename   between
 *                          attribute  and  non-attribute space
 *                          is rejected to prevent  an  already
 *                          linked  file from being renamed and
 *                          thereby circumventing the link res-
 *                          triction above.
 *
 * mkdir, symlink, mknod    Any  attempt  to  create  a   "non-
 *                          regular" file in attribute space is
 *                          rejected to reduce the  functional-
 *                          ity,  and  therefore  exposure  and
 *                          risk, of  the  initial  implementa-
 *                          tion.
 *
 * The entire available name space has been allocated to  "gen-
 * eral use" to bring the implementation in line with the NFSv4
 * draft standard [NFSv4]. That standard defines "named  attri-
 * butes"  (equivalent  to Solaris Extended Attributes) with no
 * naming restrictions.  All Sun  applications  making  use  of
 * opaque extended attributes will use the prefix "SUNW".
 *
 */
#ifdef HAVE_SYS_ATTR_H
#include <sys/attr.h>
#endif

#ifdef HAVE_ATTR_H
#include <attr.h>
#endif

#ifdef HAVE_SYS_NVPAIR_H
#include <sys/nvpair.h>
#endif

#ifdef HAVE_SYS_ACL_H
#include <sys/acl.h>
#endif

/*
 * Define the supported XATTR streams for this OS
 */
#if defined(HAVE_SYS_NVPAIR_H) && defined(_PC_SATTR_ENABLED)
static int os_default_xattr_streams[2] = { STREAM_XATTR_SOLARIS, STREAM_XATTR_SOLARIS_SYS};
#else
static int os_default_xattr_streams[1] = { STREAM_XATTR_SOLARIS };
#endif /* defined(HAVE_SYS_NVPAIR_H) && defined(_PC_SATTR_ENABLED) */

/*
 * This code creates a temporary cache with entries for each xattr which has
 * a link count > 1 (which indicates it has one or more hard linked counterpart(s))
 */
static xattr_link_cache_entry_t *find_xattr_link_cache_entry(JCR *jcr, ino_t inum)
{
   xattr_link_cache_entry_t *ptr;
   xattr_private_data_t *xpd = (xattr_private_data_t *)jcr->xattr_private_data;

   foreach_alist(ptr, xpd->xattr_link_cache) {
      if (ptr && ptr->inum == inum) {
         return ptr;
      }
   }
   return NULL;
}

static void add_xattr_link_cache_entry(JCR *jcr, ino_t inum, char *target)
{
   xattr_link_cache_entry_t *ptr;
   xattr_private_data_t *xpd = (xattr_private_data_t *)jcr->xattr_private_data;

   ptr = (xattr_link_cache_entry_t *)malloc(sizeof(xattr_link_cache_entry_t));
   memset((caddr_t)ptr, 0, sizeof(xattr_link_cache_entry_t));
   ptr->inum = inum;
   bstrncpy(ptr->target, target, sizeof(ptr->target));
   xpd->xattr_link_cache->append(ptr);
}

#if defined(HAVE_SYS_NVPAIR_H) && defined(_PC_SATTR_ENABLED)
/*
 * This function returns true if a non default extended system attribute
 * list is associated with fd and returns false when an error has occured
 * or when only extended system attributes other than archive,
 * av_modified or crtime are set.
 *
 * The function returns true for the following cases:
 *
 * - any extended system attribute other than the default attributes
 *   ('archive', 'av_modified' and 'crtime') is set
 * - nvlist has NULL name string
 * - nvpair has data type of 'nvlist'
 * - default data type.
 */
static bool solaris_has_non_transient_extensible_attributes(int fd)
{
   boolean_t value;
   data_type_t type;
   nvlist_t *response;
   nvpair_t *pair;
   f_attr_t fattr;
   char *name;
   bool retval = false;

   if (fgetattr(fd, XATTR_VIEW_READWRITE, &response) != 0) {
      return false;
   }

   pair = NULL;
   while ((pair = nvlist_next_nvpair(response, pair)) != NULL) {
      name = nvpair_name(pair);

      if (name != NULL) {
         fattr = name_to_attr(name);
      } else {
         retval = true;
         goto bail_out;
      }

      type = nvpair_type(pair);
      switch (type) {
      case DATA_TYPE_BOOLEAN_VALUE:
         if (nvpair_value_boolean_value(pair, &value) != 0) {
            continue;
         }
         if (value && fattr != F_ARCHIVE &&
                      fattr != F_AV_MODIFIED) {
            retval = true;
            goto bail_out;
         }
         break;
      case DATA_TYPE_UINT64_ARRAY:
         if (fattr != F_CRTIME) {
            retval = true;
            goto bail_out;
         }
         break;
      case DATA_TYPE_NVLIST:
      default:
         retval = true;
         goto bail_out;
      }
   }

bail_out:
   if (response != NULL) {
      nvlist_free(response);
   }
   return retval;
}
#endif /* HAVE_SYS_NVPAIR_H && _PC_SATTR_ENABLED */

#if defined(HAVE_ACL) && !defined(HAVE_EXTENDED_ACL)
/*
 * See if an acl is a trivial one (e.g. just the stat bits encoded as acl.)
 * There is no need to store those acls as we already store the stat bits too.
 */
static bool acl_is_trivial(int count, aclent_t *entries)
{
   int n;
   aclent_t *ace;

   for (n = 0; n < count; n++) {
      ace = &entries[n];
      if (!(ace->a_type == USER_OBJ ||
            ace->a_type == GROUP_OBJ ||
            ace->a_type == OTHER_OBJ ||
            ace->a_type == CLASS_OBJ))
        return false;
   }
   return true;
}
#endif /* HAVE_ACL && !HAVE_EXTENDED_ACL */

static bxattr_exit_code solaris_save_xattr_acl(JCR *jcr, int fd, const char *attrname, char **acl_text)
{
#ifdef HAVE_ACL
#ifdef HAVE_EXTENDED_ACL
   int flags;
   acl_t *aclp = NULL;
   berrno be;

   /*
    * See if this attribute has an ACL
    */
   if ((fd != -1 && fpathconf(fd, _PC_ACL_ENABLED) > 0) ||
       pathconf(attrname, _PC_ACL_ENABLED) > 0) {
      /*
       * See if there is a non trivial acl on the file.
       */
      if ((fd != -1 && facl_get(fd, ACL_NO_TRIVIAL, &aclp) != 0) ||
           acl_get(attrname, ACL_NO_TRIVIAL, &aclp) != 0) {
         switch (errno) {
         case ENOENT:
            return bxattr_exit_ok;
         default:
            Mmsg3(jcr->errmsg, _("Unable to get acl on xattr %s on file \"%s\": ERR=%s\n"),
                  attrname, jcr->last_fname, be.bstrerror());
            Dmsg3(100, "facl_get/acl_get of xattr %s on \"%s\" failed: ERR=%s\n",
                  attrname, jcr->last_fname, be.bstrerror());
            return bxattr_exit_error;
         }
      }

      if (aclp != NULL) {
#if defined(ACL_SID_FMT)
         /*
          * New format flag added in newer Solaris versions.
          */
         flags = ACL_APPEND_ID | ACL_COMPACT_FMT | ACL_SID_FMT;
#else
         flags = ACL_APPEND_ID | ACL_COMPACT_FMT;
#endif /* ACL_SID_FMT */

         *acl_text = acl_totext(aclp, flags);
         acl_free(aclp);
      } else {
         *acl_text = NULL;
      }
   } else {
      *acl_text = NULL;
   }
   return bxattr_exit_ok;
#else /* HAVE_EXTENDED_ACL */
   int n;
   aclent_t *acls = NULL;
   berrno be;

   /*
    * See if this attribute has an ACL
    */
   if (fd != -1) {
      n = facl(fd, GETACLCNT, 0, NULL);
   } else {
      n = acl(attrname, GETACLCNT, 0, NULL);
   }

   if (n >= MIN_ACL_ENTRIES) {
      acls = (aclent_t *)malloc(n * sizeof(aclent_t));
      if ((fd != -1 && facl(fd, GETACL, n, acls) != n) ||
          acl(attrname, GETACL, n, acls) != n) {
         switch (errno) {
         case ENOENT:
            free(acls);
            return bxattr_exit_ok;
         default:
            Mmsg3(jcr->errmsg, _("Unable to get acl on xattr %s on file \"%s\": ERR=%s\n"),
                  attrname, jcr->last_fname, be.bstrerror());
            Dmsg3(100, "facl/acl of xattr %s on \"%s\" failed: ERR=%s\n",
                  attrname, jcr->last_fname, be.bstrerror());
            free(acls);
            return bxattr_exit_error;
         }
      }

      /*
       * See if there is a non trivial acl on the file.
       */
      if (!acl_is_trivial(n, acls)) {
         if ((*acl_text = acltotext(acls, n)) == NULL) {
            Mmsg3(jcr->errmsg, _("Unable to get acl text on xattr %s on file \"%s\": ERR=%s\n"),
                  attrname, jcr->last_fname, be.bstrerror());
            Dmsg3(100, "acltotext of xattr %s on \"%s\" failed: ERR=%s\n",
                  attrname, jcr->last_fname, be.bstrerror());
            free(acls);
            return bxattr_exit_error;
         }
      } else {
         *acl_text = NULL;
      }

     free(acls);
   } else {
      *acl_text = NULL;
   }
   return bxattr_exit_ok;
#endif /* HAVE_EXTENDED_ACL */

#else /* HAVE_ACL */
   return bxattr_exit_ok;
#endif /* HAVE_ACL */
}

/*
 * Forward declaration for recursive function call.
 */
static bxattr_exit_code solaris_save_xattrs(JCR *jcr, const char *xattr_namespace, const char *attr_parent);

/*
 * Save an extended or extensible attribute.
 * This is stored as an opaque stream of bytes with the following encoding:
 *
 * <xattr_name>\0<stat_buffer>\0<acl_string>\0<actual_xattr_data>
 * 
 * or for a hardlinked or symlinked attribute
 *
 * <xattr_name>\0<stat_buffer>\0<xattr_link_source>\0
 *
 * xattr_name can be a subpath relative to the file the xattr is on.
 * stat_buffer is the string representation of the stat struct.
 * acl_string is an acl text when a non trivial acl is set on the xattr.
 * actual_xattr_data is the content of the xattr file.
 */
static bxattr_exit_code solaris_save_xattr(JCR *jcr, int fd, const char *xattr_namespace,
                                           const char *attrname, bool toplevel_hidden_dir, int stream)
{
   int cnt;
   int attrfd = -1;
   struct stat st;
   xattr_link_cache_entry_t *xlce;
   char target_attrname[PATH_MAX];
   char link_source[PATH_MAX];
   char *acl_text = NULL;
   char attribs[MAXSTRING];
   char buffer[BUFSIZ];
   xattr_private_data_t *xpd = (xattr_private_data_t *)jcr->xattr_private_data;
   bxattr_exit_code retval = bxattr_exit_error;
   berrno be;

   bsnprintf(target_attrname, sizeof(target_attrname), "%s%s", xattr_namespace, attrname);

   /*
    * Get the stats of the extended or extensible attribute.
    */
   if (fstatat(fd, attrname, &st, AT_SYMLINK_NOFOLLOW) < 0) {
      switch (errno) {
      case ENOENT:
         retval = bxattr_exit_ok;
         goto bail_out;
      default:
         Mmsg3(jcr->errmsg, _("Unable to get status on xattr %s on file \"%s\": ERR=%s\n"),
               target_attrname, jcr->last_fname, be.bstrerror());
         Dmsg3(100, "fstatat of xattr %s on \"%s\" failed: ERR=%s\n",
               target_attrname, jcr->last_fname, be.bstrerror());
         goto bail_out;
      }
   }

   /*
    * Based on the filetype perform the correct action. We support most filetypes here, more
    * then the actual implementation on Solaris supports so some code may never get executed
    * due to limitations in the implementation.
    */
   switch (st.st_mode & S_IFMT) {
   case S_IFIFO:
   case S_IFCHR:
   case S_IFBLK:
      /*
       * Get any acl on the xattr.
       */
      if (solaris_save_xattr_acl(jcr, attrfd, attrname, &acl_text) != bxattr_exit_ok)
         goto bail_out;

      /*
       * The current implementation of xattr on Solaris doesn't support this, but if it ever does we are prepared.
       * Encode the stat struct into an ASCII representation.
       */
      encode_stat(attribs, &st, 0, stream);
      cnt = bsnprintf(buffer, sizeof(buffer), "%s%c%s%c%s%c",
                     target_attrname, 0, attribs, 0, (acl_text) ? acl_text : "", 0);
      break;

   case S_IFDIR:
      /*
       * Get any acl on the xattr.
       */
      if (solaris_save_xattr_acl(jcr, attrfd, attrname, &acl_text) != bxattr_exit_ok)
         goto bail_out;

      /*
       * See if this is the toplevel_hidden_dir being saved.
       */
      if (toplevel_hidden_dir) {
         /*
          * Save the data for later storage when we encounter a real xattr.
          * Encode the stat struct into an ASCII representation and jump out of the function.
          */
         encode_stat(attribs, &st, 0, stream);
         xpd->toplevel_hidden_dir_xattr_data_len = bsnprintf(xpd->toplevel_hidden_dir_xattr_data,
                                                             sizeof(xpd->toplevel_hidden_dir_xattr_data),
                                                             "%s%c%s%c%s%c",
                                                             target_attrname, 0, attribs, 0,
                                                             (acl_text) ? acl_text : "", 0);
         goto bail_out;
      } else {
         /*
          * The current implementation of xattr on Solaris doesn't support this, but if it ever does we are prepared.
          * Encode the stat struct into an ASCII representation.
          */
         encode_stat(attribs, &st, 0, stream);
         cnt = bsnprintf(buffer, sizeof(buffer),
                         "%s%c%s%c%s%c",
                         target_attrname, 0, attribs, 0, (acl_text) ? acl_text : "", 0);
      }
      break;
   case S_IFREG:
      /*
       * If this is a hardlinked file check the inode cache for a hit.
       */
      if (st.st_nlink > 1) {
         /*
          * See if the cache already knows this inode number.
          */
         if ((xlce = find_xattr_link_cache_entry(jcr, st.st_ino)) != NULL) {
            /*
             * Generate a xattr encoding with the reference to the target in there.
             */
            encode_stat(attribs, &st, st.st_ino, stream);
            cnt = bsnprintf(buffer, sizeof(buffer),
                            "%s%c%s%c%s%c",
                            target_attrname, 0, attribs, 0, xlce->target, 0);
            pm_memcpy(jcr->xattr_data, buffer, cnt);
            jcr->xattr_data_len = cnt;
            retval = send_xattr_stream(jcr, stream);

            /*
             * For a hard linked file we are ready now, no need to recursively save the attributes.
             */
            goto bail_out;
         }

         /*
          * Store this hard linked file in the cache.
          * Store the name relative to the top level xattr space.
          */
         add_xattr_link_cache_entry(jcr, st.st_ino, target_attrname + 1);
      }

      /*
       * Get any acl on the xattr.
       */
      if (solaris_save_xattr_acl(jcr, attrfd, attrname, &acl_text) != bxattr_exit_ok) {
         goto bail_out;
      }

      /*
       * Encode the stat struct into an ASCII representation.
       */
      encode_stat(attribs, &st, 0, stream);
      cnt = bsnprintf(buffer, sizeof(buffer),
                     "%s%c%s%c%s%c",
                     target_attrname, 0, attribs, 0, (acl_text) ? acl_text : "", 0);

      /*
       * Open the extended or extensible attribute file.
       */
      if ((attrfd = openat(fd, attrname, O_RDONLY)) < 0) {
         switch (errno) {
         case ENOENT:
            retval = bxattr_exit_ok;
            goto bail_out;
         default:
            Mmsg3(jcr->errmsg, _("Unable to open xattr %s on \"%s\": ERR=%s\n"),
                  target_attrname, jcr->last_fname, be.bstrerror());
            Dmsg3(100, "openat of xattr %s on \"%s\" failed: ERR=%s\n",
                  target_attrname, jcr->last_fname, be.bstrerror());
            goto bail_out;
         }
      }
      break;

   case S_IFLNK:
      /*
       * The current implementation of xattr on Solaris doesn't support this, but if it ever does we are prepared.
       * Encode the stat struct into an ASCII representation.
       */
      if (readlink(attrname, link_source, sizeof(link_source)) < 0) {
         switch (errno) {
         case ENOENT:
            retval = bxattr_exit_ok;
            goto bail_out;
         default:
            Mmsg3(jcr->errmsg, _("Unable to read symlin %s on \"%s\": ERR=%s\n"),
                  target_attrname, jcr->last_fname, be.bstrerror());
            Dmsg3(100, "readlink of xattr %s on \"%s\" failed: ERR=%s\n",
                  target_attrname, jcr->last_fname, be.bstrerror());
            goto bail_out;
         }
      }

      /*
       * Generate a xattr encoding with the reference to the target in there.
       */
      encode_stat(attribs, &st, st.st_ino, stream);
      cnt = bsnprintf(buffer, sizeof(buffer),
                      "%s%c%s%c%s%c",
                      target_attrname, 0, attribs, 0, link_source, 0);
      pm_memcpy(jcr->xattr_data, buffer, cnt);
      jcr->xattr_data_len = cnt;
      retval = send_xattr_stream(jcr, stream);

      /*
       * For a soft linked file we are ready now, no need to recursively save the attributes.
       */
      goto bail_out;

   default:
      goto bail_out;
   }

   /*
    * See if this is the first real xattr being saved. If it is save the toplevel_hidden_dir attributes first.
    */
   if (xpd->nr_xattr_saved == 0) {
      pm_memcpy(jcr->xattr_data, xpd->toplevel_hidden_dir_xattr_data, xpd->toplevel_hidden_dir_xattr_data_len);
      jcr->xattr_data_len = xpd->toplevel_hidden_dir_xattr_data_len;
      retval = send_xattr_stream(jcr, STREAM_XATTR_SOLARIS);
   }

   pm_memcpy(jcr->xattr_data, buffer, cnt);
   jcr->xattr_data_len = cnt;

   /*
    * Only dump the content of regular files.
    */
   switch (st.st_mode & S_IFMT) {
   case S_IFREG:
      if (st.st_size > 0) {
         /*
          * Protect ourself against things getting out of hand.
          */
         if (st.st_size >= MAX_XATTR_STREAM) {
            Mmsg2(jcr->errmsg, _("Xattr stream on file \"%s\" exceeds maximum size of %d bytes\n"),
                  jcr->last_fname, MAX_XATTR_STREAM);
            goto bail_out;
         }

         while ((cnt = read(attrfd, buffer, sizeof(buffer))) > 0) {
            jcr->xattr_data = check_pool_memory_size(jcr->xattr_data, jcr->xattr_data_len + cnt);
            memcpy(jcr->xattr_data + jcr->xattr_data_len, buffer, cnt);
            jcr->xattr_data_len += cnt;
         }

         if (cnt < 0) {
            Mmsg2(jcr->errmsg, _("Unable to read content of xattr %s on file \"%s\"\n"),
                  target_attrname, jcr->last_fname);
            Dmsg2(100, "read of data from xattr %s on \"%s\" failed\n",
                  target_attrname, jcr->last_fname);
            goto bail_out;
         }
      }
      break;

   default:
      break;
   }

   if (retval) {
      retval = send_xattr_stream(jcr, stream);
      xpd->nr_xattr_saved++;
   }

   /*
    * Recursivly call solaris_save_extended_attributes for archiving the attributes
    * available on this extended attribute.
    */
   if (retval) {
      retval = solaris_save_xattrs(jcr, xattr_namespace, attrname);
      
      /*
       * The recursive call could change our working dir so change back to the wanted workdir.
       */
      if (fchdir(fd) < 0) {
         switch (errno) {
         case ENOENT:
            retval = bxattr_exit_ok;
            goto bail_out;
         default:
            Mmsg2(jcr->errmsg, _("Unable to chdir to xattr space of file \"%s\": ERR=%s\n"),
                  jcr->last_fname, be.bstrerror());
            Dmsg3(100, "Unable to fchdir to xattr space of file \"%s\" using fd %d: ERR=%s\n",
                  jcr->last_fname, fd, be.bstrerror());
            goto bail_out;
         }
      }
   }

bail_out:
   if (acl_text) {
      free(acl_text);
   }
   if (attrfd != -1) {
      close(attrfd);
   }
   return retval;
}

static bxattr_exit_code solaris_save_xattrs(JCR *jcr, const char *xattr_namespace, const char *attr_parent)
{
   const char *name;
   int fd, filefd = -1, attrdirfd = -1;
   DIR *dirp;
   struct dirent *dp;
   char current_xattr_namespace[PATH_MAX];
   bxattr_exit_code retval = bxattr_exit_error;
   berrno be;
 
   /*
    * Determine what argument to use. Use attr_parent when set
    * (recursive call) or jcr->last_fname for first call. Also save
    * the current depth of the xattr_space we are in.
    */
   if (attr_parent) {
      name = attr_parent;
      if (xattr_namespace) {
         bsnprintf(current_xattr_namespace, sizeof(current_xattr_namespace), "%s%s/",
                   xattr_namespace, attr_parent);
      } else {
         bstrncpy(current_xattr_namespace, "/", sizeof(current_xattr_namespace));
      }
   } else {
      name = jcr->last_fname;
      bstrncpy(current_xattr_namespace, "/", sizeof(current_xattr_namespace));
   }

   /*
    * Open the file on which to save the xattrs read-only.
    */
   if ((filefd = open(name, O_RDONLY | O_NONBLOCK)) < 0) {
      switch (errno) {
      case ENOENT:
         retval = bxattr_exit_ok;
         goto bail_out;
      default:
         Mmsg2(jcr->errmsg, _("Unable to open file \"%s\": ERR=%s\n"),
               jcr->last_fname, be.bstrerror());
         Dmsg2(100, "Unable to open file \"%s\": ERR=%s\n",
               jcr->last_fname, be.bstrerror());
         goto bail_out;
      }
   }

   /*
    * Open the xattr naming space.
    */
   if ((attrdirfd = openat(filefd, ".", O_RDONLY | O_XATTR)) < 0) {
      switch (errno) {
      case EINVAL:
         /*
          * Gentile way of the system saying this type of xattr layering is not supported.
          * Which is not problem we just forget about this this xattr.
          * But as this is not an error we return a positive return value.
          */
         retval = bxattr_exit_ok;
         goto bail_out;
      case ENOENT:
         retval = bxattr_exit_ok;
         goto bail_out;
      default:
         Mmsg3(jcr->errmsg, _("Unable to open xattr space %s on file \"%s\": ERR=%s\n"),
               name, jcr->last_fname, be.bstrerror());
         Dmsg3(100, "Unable to open xattr space %s on file \"%s\": ERR=%s\n",
               name, jcr->last_fname, be.bstrerror());
         goto bail_out;
      }
   }

  /*
   * We need to change into the attribute directory to determine if each of the
   * attributes should be saved.
   */
   if (fchdir(attrdirfd) < 0) {
      Mmsg2(jcr->errmsg, _("Unable to chdir to xattr space on file \"%s\": ERR=%s\n"),
            jcr->last_fname, be.bstrerror());
      Dmsg3(100, "Unable to fchdir to xattr space on file \"%s\" using fd %d: ERR=%s\n",
            jcr->last_fname, attrdirfd, be.bstrerror());
      goto bail_out;
   }

   /*
    * Save the data of the toplevel xattr hidden_dir. We save this one before anything
    * else because the readdir returns "." entry after the extensible attr entry.
    * And as we want this entry before anything else we better just save its data.
    */
   if (!attr_parent)
      solaris_save_xattr(jcr, attrdirfd, current_xattr_namespace, ".",
                         true, STREAM_XATTR_SOLARIS);

   if ((fd = dup(attrdirfd)) == -1 ||
       (dirp = fdopendir(fd)) == (DIR *)NULL) {
      Mmsg2(jcr->errmsg, _("Unable to list the xattr space on file \"%s\": ERR=%s\n"),
            jcr->last_fname, be.bstrerror());
      Dmsg3(100, "Unable to fdopendir xattr space on file \"%s\" using fd %d: ERR=%s\n",
            jcr->last_fname, fd, be.bstrerror());

      goto bail_out;
   }

   /*
    * Walk the namespace.
    */
   while (dp = readdir(dirp)) {
      /*
       * Skip only the toplevel . dir.
       */
      if (!attr_parent && !strcmp(dp->d_name, "."))
         continue;

      /*
       * Skip all .. directories
       */
      if (!strcmp(dp->d_name, ".."))
         continue;

      Dmsg3(400, "processing extended attribute %s%s on file \"%s\"\n",
         current_xattr_namespace, dp->d_name, jcr->last_fname);

#if defined(HAVE_SYS_NVPAIR_H) && defined(_PC_SATTR_ENABLED)
      /*
       * We are not interested in read-only extensible attributes.
       */
      if (!strcmp(dp->d_name, VIEW_READONLY)) {
         Dmsg3(400, "Skipping readonly extensible attributes %s%s on file \"%s\"\n",
            current_xattr_namespace, dp->d_name, jcr->last_fname);

         continue;
      }

      /*
       * We are only interested in read-write extensible attributes
       * when they contain non-transient values.
       */
      if (!strcmp(dp->d_name, VIEW_READWRITE)) {
         /*
          * Determine if there are non-transient system attributes at the toplevel.
          * We need to provide a fd to the open file.
          */
         if (!solaris_has_non_transient_extensible_attributes(filefd)) {
            Dmsg3(400, "Skipping transient extensible attributes %s%s on file \"%s\"\n",
               current_xattr_namespace, dp->d_name, jcr->last_fname);
            continue;
         }

         /*
          * Save the xattr.
          */
         solaris_save_xattr(jcr, attrdirfd, current_xattr_namespace, dp->d_name,
                            false, STREAM_XATTR_SOLARIS_SYS);
         continue;
      }
#endif /* HAVE_SYS_NVPAIR_H && _PC_SATTR_ENABLED */

      /*
       * Save the xattr.
       */
      solaris_save_xattr(jcr, attrdirfd, current_xattr_namespace, dp->d_name,
                         false, STREAM_XATTR_SOLARIS);
   }

   closedir(dirp);
   retval = bxattr_exit_ok;

bail_out:
   if (attrdirfd != -1)
      close(attrdirfd);
   if (filefd != -1)
      close(filefd);
   return retval;
}

#ifdef HAVE_ACL
static bxattr_exit_code solaris_restore_xattr_acl(JCR *jcr, int fd, const char *attrname, char *acl_text)
{
#ifdef HAVE_EXTENDED_ACL
   int error;
   acl_t *aclp = NULL;
   berrno be;

   if ((error = acl_fromtext(acl_text, &aclp)) != 0) {
      Mmsg1(jcr->errmsg, _("Unable to convert acl from text on file \"%s\"\n"),
            jcr->last_fname);
      return bxattr_exit_error;
   }

   if ((fd != -1 && facl_set(fd, aclp) != 0) ||
        acl_set(attrname, aclp) != 0) {
      Mmsg3(jcr->errmsg, _("Unable to restore acl of xattr %s on file \"%s\": ERR=%s\n"),
            attrname, jcr->last_fname, be.bstrerror());
      Dmsg3(100, "Unable to restore acl of xattr %s on file \"%s\": ERR=%s\n",
            attrname, jcr->last_fname, be.bstrerror());
      return bxattr_exit_error;
   }

   if (aclp) {
      acl_free(aclp);
   }
   return bxattr_exit_ok;

#else /* HAVE_EXTENDED_ACL */
   int n;
   aclent_t *acls = NULL;
   berrno be;

   acls = aclfromtext(acl_text, &n);
   if (!acls) {
      if ((fd != -1 && facl(fd, SETACL, n, acls) != 0) ||
           acl(attrname, SETACL, n, acls) != 0) {
         Mmsg3(jcr->errmsg, _("Unable to restore acl of xattr %s on file \"%s\": ERR=%s\n"),
               attrname, jcr->last_fname, be.bstrerror());
         Dmsg3(100, "Unable to restore acl of xattr %s on file \"%s\": ERR=%s\n",
               attrname, jcr->last_fname, be.bstrerror());
         return bxattr_exit_error;
      }
   }

   if (acls) {
      free(acls);
   }
   return bxattr_exit_ok;

#endif /* HAVE_EXTENDED_ACL */

}
#endif /* HAVE_ACL */

static bxattr_exit_code solaris_restore_xattrs(JCR *jcr, bool is_extensible)
{
   int fd, filefd = -1, attrdirfd = -1, attrfd = -1;
   int used_bytes, total_bytes, cnt;
   char *bp, *target_attrname, *attribs;
   char *linked_target = NULL;
   char *acl_text = NULL;
   char *data = NULL;
   int32_t inum;
   struct stat st;
   struct timeval times[2];
   bxattr_exit_code retval = bxattr_exit_error;
   berrno be;

   /*
    * Parse the xattr stream. First the part that is the same for all xattrs.
    */
   used_bytes = 0;
   total_bytes = jcr->xattr_data_len;

   /*
    * The name of the target xattr has a leading / we are not interested
    * in that so skip it when decoding the string. We always start a the /
    * of the xattr space anyway.
    */
   target_attrname = jcr->xattr_data + 1;
   if ((bp = strchr(target_attrname, '\0')) == (char *)NULL ||
       (used_bytes = (bp - jcr->xattr_data)) >= (total_bytes - 1)) {
      goto parse_error;
   }
   attribs = ++bp;

   /*
    * Open the file on which to restore the xattrs read-only.
    */
   if ((filefd = open(jcr->last_fname, O_RDONLY | O_NONBLOCK)) < 0) {
      Mmsg2(jcr->errmsg, _("Unable to open file \"%s\": ERR=%s\n"),
            jcr->last_fname, be.bstrerror());
      Dmsg2(100, "Unable to open file \"%s\": ERR=%s\n",
            jcr->last_fname, be.bstrerror());
      goto bail_out;
   }

   /*
    * Open the xattr naming space and make it the current working dir.
    */
   if ((attrdirfd = openat(filefd, ".", O_RDONLY | O_XATTR)) < 0) {
      Mmsg2(jcr->errmsg, _("Unable to open xattr space on file \"%s\": ERR=%s\n"),
            jcr->last_fname, be.bstrerror());
      Dmsg2(100, "Unable to open xattr space on file \"%s\": ERR=%s\n",
            jcr->last_fname, be.bstrerror());
      goto bail_out;
   }

   if (fchdir(attrdirfd) < 0) {
      Mmsg2(jcr->errmsg, _("Unable to chdir to xattr space on file \"%s\": ERR=%s\n"),
            jcr->last_fname, be.bstrerror());
      Dmsg3(100, "Unable to fchdir to xattr space on file \"%s\" using fd %d: ERR=%s\n",
            jcr->last_fname, attrdirfd, be.bstrerror());
      goto bail_out;
   }

   /*
    * Try to open the correct xattr subdir based on the target_attrname given.
    * e.g. check if its a subdir attrname. Each / in the string makes us go
    * one level deeper.
    */
   while ((bp = strchr(target_attrname, '/')) != (char *)NULL) {
      *bp = '\0';

      if ((fd = open(target_attrname, O_RDONLY | O_NONBLOCK)) < 0) {
         Mmsg3(jcr->errmsg, _("Unable to open xattr %s on file \"%s\": ERR=%s\n"),
               target_attrname, jcr->last_fname, be.bstrerror());
         Dmsg3(100, "Unable to open xattr %s on file \"%s\": ERR=%s\n",
               target_attrname, jcr->last_fname, be.bstrerror());
         goto bail_out;
      }

      close(filefd);
      filefd = fd;

      /*
       * Open the xattr naming space.
       */
      if ((fd = openat(filefd, ".", O_RDONLY | O_XATTR)) < 0) {
         Mmsg3(jcr->errmsg, _("Unable to open xattr space %s on file \"%s\": ERR=%s\n"),
               target_attrname, jcr->last_fname, be.bstrerror());
         Dmsg3(100, "Unable to open xattr space %s on file \"%s\": ERR=%s\n",
               target_attrname, jcr->last_fname, be.bstrerror());
         goto bail_out;
      }

      close(attrdirfd);
      attrdirfd = fd;

      /*
       * Make the xattr space our current workingdir.
       */
      if (fchdir(attrdirfd) < 0) {
         Mmsg3(jcr->errmsg, _("Unable to chdir to xattr space %s on file \"%s\": ERR=%s\n"),
               target_attrname, jcr->last_fname, be.bstrerror());
         Dmsg4(100, "Unable to fchdir to xattr space %s on file \"%s\" using fd %d: ERR=%s\n",
               target_attrname, jcr->last_fname, attrdirfd, be.bstrerror());
         goto bail_out;
      }

      target_attrname = ++bp;
   }

   /*
    * Decode the attributes from the stream.
    */
   decode_stat(attribs, &st, &inum);

   /*
    * Decode the next field (acl_text).
    */
   if ((bp = strchr(attribs, '\0')) == (char *)NULL ||
       (used_bytes = (bp - jcr->xattr_data)) >= (total_bytes - 1)) {
      goto parse_error;
   }
   acl_text = ++bp;

   /*
    * Based on the filetype perform the correct action. We support most filetypes here, more
    * then the actual implementation on Solaris supports so some code may never get executed
    * due to limitations in the implementation.
    */
   switch (st.st_mode & S_IFMT) {
   case S_IFIFO:
      /*
       * The current implementation of xattr on Solaris doesn't support this, but if it ever does we are prepared.
       */
      unlinkat(attrdirfd, target_attrname, 0);
      if (mkfifo(target_attrname, st.st_mode) < 0) {
         Mmsg3(jcr->errmsg, _("Unable to mkfifo xattr %s on file \"%s\": ERR=%s\n"),
               target_attrname, jcr->last_fname, be.bstrerror());
         Dmsg3(100, "Unable to mkfifo xattr %s on file \"%s\": ERR=%s\n",
               target_attrname,  jcr->last_fname, be.bstrerror());
         goto bail_out;
      }
      break;
   case S_IFCHR:
   case S_IFBLK:
      /*
       * The current implementation of xattr on Solaris doesn't support this, but if it ever does we are prepared.
       */
      unlinkat(attrdirfd, target_attrname, 0);
      if (mknod(target_attrname, st.st_mode, st.st_rdev) < 0) {
         Mmsg3(jcr->errmsg, _("Unable to mknod xattr %s on file \"%s\": ERR=%s\n"),
               target_attrname, jcr->last_fname, be.bstrerror());
         Dmsg3(100, "Unable to mknod xattr %s on file \"%s\": ERR=%s\n",
               target_attrname,  jcr->last_fname, be.bstrerror());
         goto bail_out;
      }
      break;
   case S_IFDIR:
      /*
       * If its not the hidden_dir create the entry.
       * The current implementation of xattr on Solaris doesn't support this, but if it ever does we are prepared.
       */
      if (strcmp(target_attrname, ".")) {
         unlinkat(attrdirfd, target_attrname, AT_REMOVEDIR);
         if (mkdir(target_attrname, st.st_mode) < 0) {
            Jmsg3(jcr, M_WARNING, 0, _("Unable to mkdir xattr %s on file \"%s\": ERR=%s\n"),
               target_attrname, jcr->last_fname, be.bstrerror());
            Dmsg3(100, "Unable to mkdir xattr %s on file \"%s\": ERR=%s\n",
               target_attrname,  jcr->last_fname, be.bstrerror());
            goto bail_out;
         }
      }
      break;
   case S_IFREG:
      /*
       * See if this is a hard linked file. e.g. inum != 0
       */
      if (inum != 0) {
         linked_target = bp;

         unlinkat(attrdirfd, target_attrname, 0);
         if (link(linked_target, target_attrname) < 0) {
            Mmsg4(jcr->errmsg, _("Unable to link xattr %s to %s on file \"%s\": ERR=%s\n"),
                  target_attrname, linked_target, jcr->last_fname, be.bstrerror());
            Dmsg4(100, "Unable to link xattr %s to %s on file \"%s\": ERR=%s\n",
                  target_attrname, linked_target, jcr->last_fname, be.bstrerror());
            goto bail_out;
         }

         /*
          * Successfully restored xattr.
          */
         retval = bxattr_exit_ok;
         goto bail_out;
      } else {
         if ((bp = strchr(acl_text, '\0')) == (char *)NULL ||
             (used_bytes = (bp - jcr->xattr_data)) >= total_bytes) {
            goto parse_error;
         }

         if (used_bytes < (total_bytes - 1))
            data = ++bp;

         /*
          * Restore the actual xattr.
          */
         if (!is_extensible) {
            unlinkat(attrdirfd, target_attrname, 0);
         }

         if ((attrfd = openat(attrdirfd, target_attrname, O_RDWR | O_CREAT | O_TRUNC, st.st_mode)) < 0) {
            Mmsg3(jcr->errmsg, _("Unable to open xattr %s on file \"%s\": ERR=%s\n"),
                  target_attrname, jcr->last_fname, be.bstrerror());
            Dmsg3(100, "Unable to open xattr %s on file \"%s\": ERR=%s\n",
                  target_attrname, jcr->last_fname, be.bstrerror());
            goto bail_out;
         }
      }

      /*
       * Restore the actual data.
       */
      if (st.st_size > 0) {
         used_bytes = (data - jcr->xattr_data);
         cnt = total_bytes - used_bytes;

         /*
          * Do a sanity check, the st.st_size should be the same as the number of bytes
          * we have available as data of the stream.
          */
         if (cnt != st.st_size) {
            Mmsg2(jcr->errmsg, _("Unable to restore data of xattr %s on file \"%s\": Not all data available in xattr stream\n"),
                  target_attrname, jcr->last_fname);
            Dmsg2(100, "Unable to restore data of xattr %s on file \"%s\": Not all data available in xattr stream\n",
                  target_attrname, jcr->last_fname);
            goto bail_out;
         }

         while (cnt > 0) {
            cnt = write(attrfd, data, cnt);
            if (cnt < 0) {
               Mmsg3(jcr->errmsg, _("Unable to restore data of xattr %s on file \"%s\": ERR=%s\n"),
                     target_attrname, jcr->last_fname, be.bstrerror());
               Dmsg3(100, "Unable to restore data of xattr %s on file \"%s\": ERR=%s\n",
                     target_attrname, jcr->last_fname, be.bstrerror());
               goto bail_out;
            }

            used_bytes += cnt;
            data += cnt;
            cnt = total_bytes - used_bytes;
         }
      }
      break;
   case S_IFLNK:
      /*
       * The current implementation of xattr on Solaris doesn't support this, but if it ever does we are prepared.
       */
      linked_target = bp;

      if (symlink(linked_target, target_attrname) < 0) {
         Mmsg4(jcr->errmsg, _("Unable to symlink xattr %s to %s on file \"%s\": ERR=%s\n"),
               target_attrname, linked_target, jcr->last_fname, be.bstrerror());
         Dmsg4(100, "Unable to symlink xattr %s to %s on file \"%s\": ERR=%s\n",
               target_attrname, linked_target, jcr->last_fname, be.bstrerror());
         goto bail_out;
      }

      /*
       * Successfully restored xattr.
       */
      retval = bxattr_exit_ok;
      goto bail_out;
   default:
      goto bail_out;
   }

   /*
    * Restore owner and acl for non extensible attributes.
    */
   if (!is_extensible) {
      if (fchownat(attrdirfd, target_attrname, st.st_uid, st.st_gid, AT_SYMLINK_NOFOLLOW) < 0) {
         switch (errno) {
         case EINVAL:
            /*
             * Gentile way of the system saying this type of xattr layering is not supported.
             * But as this is not an error we return a positive return value.
             */
            retval = bxattr_exit_ok;
            break;
         case ENOENT:
            retval = bxattr_exit_ok;
            break;
         default:
            Mmsg3(jcr->errmsg, _("Unable to restore owner of xattr %s on file \"%s\": ERR=%s\n"),
                  target_attrname, jcr->last_fname, be.bstrerror());
            Dmsg3(100, "Unable to restore owner of xattr %s on file \"%s\": ERR=%s\n",
                  target_attrname, jcr->last_fname, be.bstrerror());
         }
         goto bail_out;
      }
   }

#ifdef HAVE_ACL
   if (acl_text && *acl_text)
      if (solaris_restore_xattr_acl(jcr, attrfd, target_attrname, acl_text) != bxattr_exit_ok)
         goto bail_out;
#endif /* HAVE_ACL */

   /*
    * For a non extensible attribute restore access and modification time on the xattr.
    */
   if (!is_extensible) {
      times[0].tv_sec = st.st_atime;
      times[0].tv_usec = 0;
      times[1].tv_sec = st.st_mtime;
      times[1].tv_usec = 0;

      if (futimesat(attrdirfd, target_attrname, times) < 0) {
         Mmsg3(jcr->errmsg, _("Unable to restore filetimes of xattr %s on file \"%s\": ERR=%s\n"),
               target_attrname, jcr->last_fname, be.bstrerror());
         Dmsg3(100, "Unable to restore filetimes of xattr %s on file \"%s\": ERR=%s\n",
               target_attrname, jcr->last_fname, be.bstrerror());
         goto bail_out;
      }
   }

   /*
    * Successfully restored xattr.
    */
   retval = bxattr_exit_ok;
   goto bail_out;

parse_error:
   Mmsg1(jcr->errmsg, _("Illegal xattr stream, failed to parse xattr stream on file \"%s\"\n"),
         jcr->last_fname);
   Dmsg1(100, "Illegal xattr stream, failed to parse xattr stream on file \"%s\"\n",
         jcr->last_fname);

bail_out:
   if (attrfd != -1) {
      close(attrfd);
   }
   if (attrdirfd != -1) {
      close(attrdirfd);
   }
   if (filefd != -1) {
      close(filefd);
   }
   return retval;
}

static bxattr_exit_code solaris_build_xattr_streams(JCR *jcr, FF_PKT *ff_pkt)
{
   char cwd[PATH_MAX];
   xattr_private_data_t *xpd;
   bxattr_exit_code retval = bxattr_exit_ok;

   /*
    * First see if extended attributes or extensible attributes are present.
    * If not just pretend things went ok.
    */
   if (pathconf(jcr->last_fname, _PC_XATTR_EXISTS) > 0) {
      xpd = (xattr_private_data_t *)malloc(sizeof(xattr_private_data_t));
      memset((caddr_t)xpd, 0, sizeof(xattr_private_data_t));
      xpd->xattr_link_cache = New(alist(10, not_owned_by_alist));
      jcr->xattr_private_data = (void *)xpd;

      /*
       * As we change the cwd in the save function save the current cwd
       * for restore after return from the solaris_save_xattrs function.
       */
      getcwd(cwd, sizeof(cwd));
      retval = solaris_save_xattrs(jcr, NULL, NULL);
      chdir(cwd);
      delete xpd->xattr_link_cache;
      xpd->xattr_link_cache = NULL;
      free(xpd);
      jcr->xattr_private_data = NULL;
   }
   return retval;
}

static bxattr_exit_code solaris_parse_xattr_streams(JCR *jcr, int stream)
{
   char cwd[PATH_MAX];
   bool is_extensible = false;
   bxattr_exit_code retval;

   /*
    * First make sure we can restore xattr on the filesystem.
    */
   switch (stream) {
#if defined(HAVE_SYS_NVPAIR_H) && defined(_PC_SATTR_ENABLED)
   case STREAM_XATTR_SOLARIS_SYS:
      if (pathconf(jcr->last_fname, _PC_SATTR_ENABLED) <= 0) {
         Qmsg1(jcr, M_WARNING, 0,
               _("Failed to restore extensible attributes on file \"%s\"\n"),
               jcr->last_fname);
         Dmsg1(100, "Unable to restore extensible attributes on file \"%s\", filesystem doesn't support this\n",
            jcr->last_fname);
         return bxattr_exit_error;
      }

      is_extensible = true;
      break;
#endif
   case STREAM_XATTR_SOLARIS:
      if (pathconf(jcr->last_fname, _PC_XATTR_ENABLED) <= 0) {
         Qmsg1(jcr, M_WARNING, 0,
               _("Failed to restore extended attributes on file \"%s\"\n"),
               jcr->last_fname);
         Dmsg1(100, "Unable to restore extended attributes on file \"%s\", filesystem doesn't support this\n",
            jcr->last_fname);
         return bxattr_exit_error;
      }
      break;
   default:
      return bxattr_exit_error;
   }

   /*
    * As we change the cwd in the restore function save the current cwd
    * for restore after return from the solaris_restore_xattrs function.
    */
   getcwd(cwd, sizeof(cwd));
   retval = solaris_restore_xattrs(jcr, is_extensible);
   chdir(cwd);
   return retval;
}


/*
 * Function pointers to the build and parse function to use for these xattrs.
 */
static bxattr_exit_code (*os_build_xattr_streams)(JCR *jcr, FF_PKT *ff_pkt) = solaris_build_xattr_streams;
static bxattr_exit_code (*os_parse_xattr_streams)(JCR *jcr, int stream) = solaris_parse_xattr_streams;

#endif /* defined(HAVE_SUN_OS) */

/*
 * Entry points when compiled with support for XATTRs on a supported platform.
 */
bxattr_exit_code build_xattr_streams(JCR *jcr, FF_PKT *ff_pkt)
{
   if (os_build_xattr_streams) {
      return (*os_build_xattr_streams)(jcr, ff_pkt);
   }
   return bxattr_exit_error;
}

bxattr_exit_code parse_xattr_streams(JCR *jcr, int stream)
{
   unsigned int cnt;

   if (os_parse_xattr_streams) {
      /*
       * See if we can parse this stream, and ifso give it a try.
       */
      for (cnt = 0; cnt < sizeof(os_default_xattr_streams) / sizeof(int); cnt++) {
         if (os_default_xattr_streams[cnt] == stream) {
            return (*os_parse_xattr_streams)(jcr, stream);
         }
      }
   }
   /*
    * Issue a warning and discard the message. But pretend the restore was ok.
    */
   Jmsg2(jcr, M_WARNING, 0,
      _("Can't restore Extended Attributes of %s - incompatible xattr stream encountered - %d\n"),
      jcr->last_fname, stream);
   return bxattr_exit_error;
}
#endif