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[oweals/gnunet.git] / src / fs / fs_publish.c
index 6262dc604e0bec9843a485c7d17d3dbd4ac68efc..75eaef6f1c97b317898243148758301b27670ece 100644 (file)
 /*
      This file is part of GNUnet.
-     (C) 2009, 2010 Christian Grothoff (and other contributing authors)
+     Copyright (C) 2009, 2010 GNUnet e.V.
 
-     GNUnet is free software; you can redistribute it and/or modify
-     it under the terms of the GNU General Public License as published
-     by the Free Software Foundation; either version 3, or (at your
-     option) any later version.
+     GNUnet is free software: you can redistribute it and/or modify it
+     under the terms of the GNU Affero General Public License as published
+     by the Free Software Foundation, either version 3 of the License,
+     or (at your option) any later version.
 
      GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
-     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-     Boston, MA 02111-1307, USA.
+     Affero General Public License for more details.
 */
-
 /**
  * @file fs/fs_publish.c
  * @brief publish a file or directory in GNUnet
- * @see http://gnunet.org/encoding
+ * @see https://gnunet.org/encoding
  * @author Krista Bennett
  * @author Christian Grothoff
  */
-
 #include "platform.h"
 #include "gnunet_constants.h"
 #include "gnunet_signatures.h"
 #include "gnunet_util_lib.h"
 #include "gnunet_fs_service.h"
-#include "fs.h"
+#include "fs_api.h"
 #include "fs_tree.h"
 
-#define DEBUG_PUBLISH GNUNET_NO
-
-
-/**
- * Context for "ds_put_cont".
- */
-struct PutContCtx
-{
-  /**
-   * Current publishing context.
-   */
-  struct GNUNET_FS_PublishContext *sc;
-
-  /**
-   * Specific file with the block.
-   */
-  struct GNUNET_FS_FileInformation *p;
-
-  /**
-   * Function to run next, if any (can be NULL).
-   */
-  GNUNET_SCHEDULER_Task cont;
-
-  /**
-   * Closure for cont.
-   */
-  void *cont_cls;
-};
-
 
 /**
- * Fill in all of the generic fields for 
+ * Fill in all of the generic fields for
  * a publish event and call the callback.
  *
  * @param pi structure to fill in
- * @param sc overall publishing context
+ * @param pc overall publishing context
  * @param p file information for the file being published
  * @param offset where in the file are we so far
  * @return value returned from callback
  */
 void *
 GNUNET_FS_publish_make_status_ (struct GNUNET_FS_ProgressInfo *pi,
-                               struct GNUNET_FS_PublishContext *sc,
-                               const struct GNUNET_FS_FileInformation *p,
-                               uint64_t offset)
+                                struct GNUNET_FS_PublishContext *pc,
+                                const struct GNUNET_FS_FileInformation *p,
+                                uint64_t offset)
 {
-  pi->value.publish.pc = sc;
+  pi->value.publish.pc = pc;
   pi->value.publish.fi = p;
-  pi->value.publish.cctx
-    = p->client_info;
-  pi->value.publish.pctx
-    = (NULL == p->dir) ? NULL : p->dir->client_info;
+  pi->value.publish.cctx = p->client_info;
+  pi->value.publish.pctx = (NULL == p->dir) ? NULL : p->dir->client_info;
   pi->value.publish.filename = p->filename;
-  pi->value.publish.size 
-    = (p->is_directory) ? p->data.dir.dir_size : p->data.file.file_size;
-  pi->value.publish.eta 
-    = GNUNET_TIME_calculate_eta (p->start_time,
-                                offset,
-                                pi->value.publish.size);
+  pi->value.publish.size =
+      (GNUNET_YES == p->is_directory) ? p->data.dir.dir_size : p->data.file.file_size;
+  pi->value.publish.eta =
+      GNUNET_TIME_calculate_eta (p->start_time, offset,
+                                 pi->value.publish.size);
   pi->value.publish.completed = offset;
-  pi->value.publish.duration = GNUNET_TIME_absolute_get_duration (p->start_time);
-  pi->value.publish.anonymity = p->anonymity;
-  return sc->h->upcb (sc->h->upcb_cls,
-                     pi);
+  pi->value.publish.duration =
+      GNUNET_TIME_absolute_get_duration (p->start_time);
+  pi->value.publish.anonymity = p->bo.anonymity_level;
+  pi->fsh = pc->h;
+  return pc->h->upcb (pc->h->upcb_cls, pi);
 }
 
 
 /**
  * Cleanup the publish context, we're done with it.
  *
- * @param cls struct to clean up after
- * @param tc scheduler context
+ * @param pc struct to clean up
  */
 static void
-publish_cleanup (void *cls,
-                const struct GNUNET_SCHEDULER_TaskContext *tc)
+publish_cleanup (struct GNUNET_FS_PublishContext *pc)
 {
-  struct GNUNET_FS_PublishContext *pc = cls;
-
-  if (pc->fhc != NULL)
-    {
-      GNUNET_CRYPTO_hash_file_cancel (pc->fhc);
-      pc->fhc = NULL;
-    }
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Cleaning up publish context (done!)\n");
+  if (NULL != pc->fhc)
+  {
+    GNUNET_CRYPTO_hash_file_cancel (pc->fhc);
+    pc->fhc = NULL;
+  }
   GNUNET_FS_file_information_destroy (pc->fi, NULL, NULL);
-  if (pc->namespace != NULL)
-    GNUNET_FS_namespace_delete (pc->namespace, GNUNET_NO);
-  GNUNET_free_non_null (pc->nid);  
+  GNUNET_free_non_null (pc->nid);
   GNUNET_free_non_null (pc->nuid);
   GNUNET_free_non_null (pc->serialization);
-  if (pc->dsh != NULL)
-    {
-      GNUNET_DATASTORE_disconnect (pc->dsh, GNUNET_NO);
-      pc->dsh = NULL;
-    }
-  if (pc->client != NULL)
-    GNUNET_CLIENT_disconnect (pc->client, GNUNET_NO);
+  if (NULL != pc->dsh)
+  {
+    GNUNET_DATASTORE_disconnect (pc->dsh, GNUNET_NO);
+    pc->dsh = NULL;
+  }
+  if (NULL != pc->mq)
+  {
+    GNUNET_MQ_destroy (pc->mq);
+    pc->mq = NULL;
+  }
+  GNUNET_assert (NULL == pc->upload_task);
   GNUNET_free (pc);
 }
 
@@ -139,56 +101,48 @@ publish_cleanup (void *cls,
  * Function called by the datastore API with
  * the result from the PUT request.
  *
- * @param cls our closure
- * @param success GNUNET_OK on success
+ * @param cls the `struct GNUNET_FS_PublishContext *`
+ * @param success #GNUNET_OK on success
+ * @param min_expiration minimum expiration time required for content to be stored
  * @param msg error message (or NULL)
  */
 static void
 ds_put_cont (void *cls,
-            int success,
-            const char *msg)
+             int success,
+            struct GNUNET_TIME_Absolute min_expiration,
+            const char *msg)
 {
-  struct PutContCtx *pcc = cls;
+  struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_ProgressInfo pi;
 
-  if (GNUNET_SYSERR == pcc->sc->in_network_wait)
-    {
-      /* we were aborted in the meantime, finish shutdown! */
-      GNUNET_SCHEDULER_add_continuation (pcc->sc->h->sched,                                     
-                                        &publish_cleanup,
-                                        pcc->sc,
-                                        GNUNET_SCHEDULER_REASON_PREREQ_DONE);
-      GNUNET_free (pcc);
-      return;
-    }
-  GNUNET_assert (GNUNET_YES == pcc->sc->in_network_wait);
-  pcc->sc->in_network_wait = GNUNET_NO;
-  if (GNUNET_OK != success)
+  pc->qre = NULL;
+  if (GNUNET_SYSERR == success)
+  {
+    GNUNET_asprintf (&pc->fi_pos->emsg,
+                     _("Publishing failed: %s"),
+                     msg);
+    pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
+    pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
+    pi.value.publish.specifics.error.message = pc->fi_pos->emsg;
+    pc->fi_pos->client_info =
+        GNUNET_FS_publish_make_status_ (&pi, pc, pc->fi_pos, 0);
+    if ((GNUNET_YES != pc->fi_pos->is_directory) &&
+        (NULL != pc->fi_pos->filename) &&
+        (GNUNET_YES == pc->any_done) &&
+        (GNUNET_YES == pc->fi_pos->data.file.do_index))
     {
-      GNUNET_asprintf (&pcc->p->emsg, 
-                      _("Publishing failed: %s"),
-                      msg);
-      pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
-      pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
-      pi.value.publish.specifics.error.message = pcc->p->emsg;
-      pcc->p->client_info = GNUNET_FS_publish_make_status_ (&pi, pcc->sc, pcc->p, 0);
-      if ( (pcc->p->is_directory == GNUNET_NO) &&
-          (pcc->p->filename != NULL) &&
-          (pcc->p->data.file.do_index == GNUNET_YES) )
-       {
-         /* run unindex to clean up */
-         GNUNET_FS_unindex_start (pcc->sc->h,
-                                  pcc->p->filename,
-                                  NULL);
-       }          
+      /* run unindex to clean up */
+      GNUNET_FS_unindex_start (pc->h,
+                               pc->fi_pos->filename,
+                               NULL);
     }
-  if (NULL != pcc->cont)
-    pcc->sc->upload_task 
-      = GNUNET_SCHEDULER_add_with_priority (pcc->sc->h->sched,
-                                           GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
-                                           pcc->cont,
-                                           pcc->cont_cls);
-  GNUNET_free (pcc);
+    return;
+  }
+  pc->any_done = GNUNET_YES;
+  GNUNET_assert (NULL == pc->upload_task);
+  pc->upload_task =
+      GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
+                                          &GNUNET_FS_publish_main_, pc);
 }
 
 
@@ -198,19 +152,21 @@ ds_put_cont (void *cls,
  * published.
  *
  * @param p the completed upload
- * @param sc context of the publication
+ * @param pc context of the publication
  */
-static void 
+static void
 signal_publish_completion (struct GNUNET_FS_FileInformation *p,
-                          struct GNUNET_FS_PublishContext *sc)
+                           struct GNUNET_FS_PublishContext *pc)
 {
   struct GNUNET_FS_ProgressInfo pi;
-  
+
   pi.status = GNUNET_FS_STATUS_PUBLISH_COMPLETED;
   pi.value.publish.eta = GNUNET_TIME_UNIT_ZERO;
   pi.value.publish.specifics.completed.chk_uri = p->chk_uri;
-  p->client_info = GNUNET_FS_publish_make_status_ (&pi, sc, p,
-                                                  GNUNET_ntohll (p->chk_uri->data.chk.file_length));
+  pi.value.publish.specifics.completed.sks_uri = p->sks_uri;
+  p->client_info =
+      GNUNET_FS_publish_make_status_ (&pi, pc, p,
+                                      p->data.file.file_size);
 }
 
 
@@ -220,49 +176,53 @@ signal_publish_completion (struct GNUNET_FS_FileInformation *p,
  * a problem during publication.
  *
  * @param p the upload that had trouble
- * @param sc context of the publication
+ * @param pc context of the publication
  * @param emsg error message
  */
-static void 
+static void
 signal_publish_error (struct GNUNET_FS_FileInformation *p,
-                     struct GNUNET_FS_PublishContext *sc,
-                     const char *emsg)
+                      struct GNUNET_FS_PublishContext *pc,
+                      const char *emsg)
 {
   struct GNUNET_FS_ProgressInfo pi;
-  
+
   p->emsg = GNUNET_strdup (emsg);
   pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
   pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
-  pi.value.publish.specifics.error.message =emsg;
-  p->client_info = GNUNET_FS_publish_make_status_ (&pi, sc, p, 0);
-  if ( (p->is_directory == GNUNET_NO) &&
-       (p->filename != NULL) &&
-       (p->data.file.do_index == GNUNET_YES) )
-    {
-      /* run unindex to clean up */
-      GNUNET_FS_unindex_start (sc->h,
-                              p->filename,
-                              NULL);
-    }     
-  
+  pi.value.publish.specifics.error.message = emsg;
+  p->client_info = GNUNET_FS_publish_make_status_ (&pi, pc, p, 0);
+  if ((p->is_directory != GNUNET_YES) &&
+      (NULL != p->filename) &&
+      (GNUNET_YES == pc->any_done) &&
+      (p->data.file.do_index == GNUNET_YES))
+  {
+    /* run unindex to clean up */
+    GNUNET_FS_unindex_start (pc->h,
+                             p->filename,
+                             NULL);
+  }
+
 }
 
 
 /**
  * Datastore returns from reservation cancel request.
- * 
- * @param cls the 'struct GNUNET_FS_PublishContext'
+ *
+ * @param cls the `struct GNUNET_FS_PublishContext *`
  * @param success success code (not used)
+ * @param min_expiration minimum expiration time required for content to be stored
  * @param msg error message (typically NULL, not used)
  */
 static void
-finish_release_reserve (void *cls,
-                       int success,
+finish_release_reserve (void *cls, int success,
+                       struct GNUNET_TIME_Absolute min_expiration,
                        const char *msg)
 {
   struct GNUNET_FS_PublishContext *pc = cls;
 
   pc->qre = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+             "Releasing reserve done!\n");
   signal_publish_completion (pc->fi, pc);
   pc->all_done = GNUNET_YES;
   GNUNET_FS_publish_sync_ (pc);
@@ -273,40 +233,40 @@ finish_release_reserve (void *cls,
  * We've finished publishing the SBlock as part of a larger upload.
  * Check the result and complete the larger upload.
  *
- * @param cls the "struct GNUNET_FS_PublishContext*" of the larger upload
+ * @param cls the `struct GNUNET_FS_PublishContext *` of the larger upload
  * @param uri URI of the published SBlock
  * @param emsg NULL on success, otherwise error message
  */
 static void
 publish_sblocks_cont (void *cls,
-                     const struct GNUNET_FS_Uri *uri,
-                     const char *emsg)
+                      const struct GNUNET_FS_Uri *uri,
+                      const char *emsg)
 {
   struct GNUNET_FS_PublishContext *pc = cls;
+
+  pc->sks_pc = NULL;
   if (NULL != emsg)
-    {
-      signal_publish_error (pc->fi,
-                           pc,
-                           emsg);
-      GNUNET_FS_publish_sync_ (pc);
-      return;
-    }  
+  {
+    signal_publish_error (pc->fi, pc, emsg);
+    GNUNET_FS_publish_sync_ (pc);
+    return;
+  }
+  if (NULL != uri)
+  {
+    /* sks publication, remember namespace URI */
+    pc->fi->sks_uri = GNUNET_FS_uri_dup (uri);
+  }
   GNUNET_assert (pc->qre == NULL);
-  if ( (pc->dsh != NULL) &&
-       (pc->rid != 0) )
-    {
-      pc->qre = GNUNET_DATASTORE_release_reserve (pc->dsh,
-                                                 pc->rid,
-                                                 UINT_MAX,
-                                                 UINT_MAX,
-                                                 GNUNET_TIME_UNIT_FOREVER_REL,
-                                                 &finish_release_reserve,
-                                                 pc);
-    }
+  if ((pc->dsh != NULL) && (pc->rid != 0))
+  {
+    pc->qre =
+        GNUNET_DATASTORE_release_reserve (pc->dsh, pc->rid, UINT_MAX, UINT_MAX,
+                                          &finish_release_reserve, pc);
+  }
   else
-    {
-      finish_release_reserve (pc, GNUNET_OK, NULL);
-    }
+  {
+    finish_release_reserve (pc, GNUNET_OK, GNUNET_TIME_UNIT_ZERO_ABS, NULL);
+  }
 }
 
 
@@ -314,26 +274,23 @@ publish_sblocks_cont (void *cls,
  * We are almost done publishing the structure,
  * add SBlocks (if needed).
  *
- * @param sc overall upload data
+ * @param pc overall upload data
  */
 static void
-publish_sblock (struct GNUNET_FS_PublishContext *sc)
+publish_sblock (struct GNUNET_FS_PublishContext *pc)
 {
-  if (NULL != sc->namespace)
-    GNUNET_FS_publish_sks (sc->h,
-                          sc->namespace,
-                          sc->nid,
-                          sc->nuid,
-                          sc->fi->meta,
-                          sc->fi->chk_uri,
-                          sc->fi->expirationTime,
-                          sc->fi->anonymity,
-                          sc->fi->priority,
-                          sc->options,
-                          &publish_sblocks_cont,
-                          sc);
+  if (NULL != pc->ns)
+    pc->sks_pc = GNUNET_FS_publish_sks (pc->h,
+                                       pc->ns,
+                                       pc->nid,
+                                       pc->nuid,
+                                       pc->fi->meta,
+                                       pc->fi->chk_uri,
+                                       &pc->fi->bo,
+                                       pc->options,
+                                       &publish_sblocks_cont, pc);
   else
-    publish_sblocks_cont (sc, NULL, NULL);
+    publish_sblocks_cont (pc, NULL, NULL);
 }
 
 
@@ -341,53 +298,50 @@ publish_sblock (struct GNUNET_FS_PublishContext *sc)
  * We've finished publishing a KBlock as part of a larger upload.
  * Check the result and continue the larger upload.
  *
- * @param cls the "struct GNUNET_FS_PublishContext*"
+ * @param cls the `struct GNUNET_FS_PublishContext *`
  *        of the larger upload
  * @param uri URI of the published blocks
  * @param emsg NULL on success, otherwise error message
  */
 static void
 publish_kblocks_cont (void *cls,
-                     const struct GNUNET_FS_Uri *uri,
-                     const char *emsg)
+                      const struct GNUNET_FS_Uri *uri,
+                      const char *emsg)
 {
   struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_FileInformation *p = pc->fi_pos;
 
+  pc->ksk_pc = NULL;
   if (NULL != emsg)
-    {
-#if DEBUG_PUBLISH
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                 "Error uploading KSK blocks: %s\n",
-                 emsg);
-#endif
-      signal_publish_error (p, pc, emsg);
-      GNUNET_FS_file_information_sync_ (p);
-      GNUNET_FS_publish_sync_ (pc);
-      pc->upload_task 
-       = GNUNET_SCHEDULER_add_with_priority (pc->h->sched,
-                                             GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
-                                             &GNUNET_FS_publish_main_,
-                                             pc);
-      return;
-    }
-#if DEBUG_PUBLISH
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+               "Error uploading KSK blocks: %s\n",
+                emsg);
+    signal_publish_error (p, pc, emsg);
+    GNUNET_FS_file_information_sync_ (p);
+    GNUNET_FS_publish_sync_ (pc);
+    GNUNET_assert (NULL == pc->upload_task);
+    pc->upload_task =
+      GNUNET_SCHEDULER_add_with_priority
+      (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
+       &GNUNET_FS_publish_main_,
+       pc);
+    return;
+  }
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-             "KSK blocks published, moving on to next file\n");
-#endif
+              "KSK blocks published, moving on to next file\n");
   if (NULL != p->dir)
-    signal_publish_completion (p, pc);    
+    signal_publish_completion (p, pc);
   /* move on to next file */
   if (NULL != p->next)
     pc->fi_pos = p->next;
   else
     pc->fi_pos = p->dir;
   GNUNET_FS_publish_sync_ (pc);
-  pc->upload_task 
-    = GNUNET_SCHEDULER_add_with_priority (pc->h->sched,
-                                         GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
-                                         &GNUNET_FS_publish_main_,
-                                         pc);
+  GNUNET_assert (NULL == pc->upload_task);
+  pc->upload_task =
+      GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
+                                          &GNUNET_FS_publish_main_, pc);
 }
 
 
@@ -406,41 +360,43 @@ publish_kblocks_cont (void *cls,
  */
 static size_t
 block_reader (void *cls,
-             uint64_t offset,
-             size_t max, 
-             void *buf,
-             char **emsg)
+              uint64_t offset,
+              size_t max,
+              void *buf,
+              char **emsg)
 {
-  struct GNUNET_FS_PublishContext *sc = cls;
+  struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_FileInformation *p;
-  size_t pt_size;
   const char *dd;
+  size_t pt_size;
 
-  p = sc->fi_pos;
-  if (p->is_directory)
-    {
-      pt_size = GNUNET_MIN(max,
-                          p->data.dir.dir_size - offset);
-      dd = p->data.dir.dir_data;
-      memcpy (buf,
-             &dd[offset],
-             pt_size);
-    }
+  p = pc->fi_pos;
+  if (GNUNET_YES == p->is_directory)
+  {
+    pt_size = GNUNET_MIN (max, p->data.dir.dir_size - offset);
+    dd = p->data.dir.dir_data;
+    GNUNET_memcpy (buf, &dd[offset], pt_size);
+  }
   else
+  {
+    if (UINT64_MAX == offset)
     {
-      pt_size = GNUNET_MIN(max,
-                          p->data.file.file_size - offset);
-      if (pt_size == 0)
-       return 0; /* calling reader with pt_size==0 
-                    might free buf, so don't! */
-      if (pt_size !=
-         p->data.file.reader (p->data.file.reader_cls,
-                              offset,
-                              pt_size,
-                              buf,
-                              emsg))
-       return 0;
+      if (&GNUNET_FS_data_reader_file_ == p->data.file.reader)
+      {
+       /* force closing the file to avoid keeping too many files open */
+       p->data.file.reader (p->data.file.reader_cls, offset, 0, NULL, NULL);
+      }
+      return 0;
     }
+    pt_size = GNUNET_MIN (max, p->data.file.file_size - offset);
+    if (0 == pt_size)
+      return 0;                 /* calling reader with pt_size==0
+                                 * might free buf, so don't! */
+    if (pt_size !=
+        p->data.file.reader (p->data.file.reader_cls, offset, pt_size, buf,
+                             emsg))
+      return 0;
+  }
   return pt_size;
 }
 
@@ -451,156 +407,142 @@ block_reader (void *cls,
  * the final result.
  *
  * @param cls our publishing context
- * @param tc scheduler's task context (not used)
  */
-static void 
-encode_cont (void *cls,
-            const struct GNUNET_SCHEDULER_TaskContext *tc)
+static void
+encode_cont (void *cls)
 {
-  struct GNUNET_FS_PublishContext *sc = cls;
+  struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_FileInformation *p;
   struct GNUNET_FS_ProgressInfo pi;
   char *emsg;
+  uint64_t flen;
 
-  p = sc->fi_pos;
-  GNUNET_FS_tree_encoder_finish (p->te,
-                                &p->chk_uri,
-                                &emsg);
-  p->te = NULL;
-  if (NULL != emsg)
-    {
-#if DEBUG_PUBLISH
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                 "Error during tree walk: %s\n",
-                 emsg);
-#endif
-      GNUNET_asprintf (&p->emsg, 
-                      _("Publishing failed: %s"),
-                      emsg);
-      GNUNET_free (emsg);
-      pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
-      pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
-      pi.value.publish.specifics.error.message = p->emsg;
-      p->client_info =  GNUNET_FS_publish_make_status_ (&pi, sc, p, 0);
-    }
-#if DEBUG_PUBLISH
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Finished with tree encoder\n");
-#endif  
-  /* final progress event */
-  pi.status = GNUNET_FS_STATUS_PUBLISH_PROGRESS;
-  pi.value.publish.specifics.progress.data = NULL;
-  pi.value.publish.specifics.progress.offset = GNUNET_FS_uri_chk_get_file_size (p->chk_uri);
-  pi.value.publish.specifics.progress.data_len = 0;
-  pi.value.publish.specifics.progress.depth = 0;
-  p->client_info = GNUNET_FS_publish_make_status_ (&pi, sc, p, 
-                                                  GNUNET_FS_uri_chk_get_file_size (p->chk_uri));
-
-  /* continue with main */
-  sc->upload_task 
-    = GNUNET_SCHEDULER_add_with_priority (sc->h->sched,
-                                         GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
-                                         &GNUNET_FS_publish_main_,
-                                         sc);
+  p = pc->fi_pos;
+  p->chk_uri = GNUNET_FS_tree_encoder_get_uri (p->te);
+  GNUNET_FS_file_information_sync_ (p);
+  GNUNET_FS_tree_encoder_finish (p->te, &emsg);
+  p->te = NULL;
+  if (NULL != emsg)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+               "Error during tree walk: %s\n",
+               emsg);
+    GNUNET_asprintf (&p->emsg,
+                    _("Publishing failed: %s"),
+                    emsg);
+    GNUNET_free (emsg);
+    pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
+    pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
+    pi.value.publish.specifics.error.message = p->emsg;
+    p->client_info = GNUNET_FS_publish_make_status_ (&pi, pc, p, 0);
+  }
+  else
+  {
+    /* final progress event */
+    GNUNET_assert (NULL != p->chk_uri);
+    flen = GNUNET_FS_uri_chk_get_file_size (p->chk_uri);
+    pi.status = GNUNET_FS_STATUS_PUBLISH_PROGRESS;
+    pi.value.publish.specifics.progress.data = NULL;
+    pi.value.publish.specifics.progress.offset = flen;
+    pi.value.publish.specifics.progress.data_len = 0;
+    pi.value.publish.specifics.progress.depth = GNUNET_FS_compute_depth (flen);
+    p->client_info = GNUNET_FS_publish_make_status_ (&pi, pc, p, flen);
+  }
+  /* continue with main */  /* continue with main */
+  GNUNET_assert (NULL == pc->upload_task);
+  pc->upload_task =
+      GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
+                                          &GNUNET_FS_publish_main_, pc);
 }
 
 
 /**
  * Function called asking for the current (encoded)
  * block to be processed.  After processing the
- * client should either call "GNUNET_FS_tree_encode_next"
- * or (on error) "GNUNET_FS_tree_encode_finish".
+ * client should either call #GNUNET_FS_tree_encoder_next
+ * or (on error) #GNUNET_FS_tree_encoder_finish.
  *
  * @param cls closure
- * @param query the query for the block (key for lookup in the datastore)
+ * @param chk content hash key for the block
  * @param offset offset of the block in the file
+ * @param depth depth of the block in the file, 0 for DBLOCK
  * @param type type of the block (IBLOCK or DBLOCK)
  * @param block the (encrypted) block
- * @param block_size size of block (in bytes)
+ * @param block_size size of @a block (in bytes)
  */
-static void 
+static void
 block_proc (void *cls,
-           const GNUNET_HashCode *query,
-           uint64_t offset,
-           enum GNUNET_BLOCK_Type type,
-           const void *block,
-           uint16_t block_size)
+            const struct ContentHashKey *chk,
+            uint64_t offset,
+            unsigned int depth,
+            enum GNUNET_BLOCK_Type type,
+            const void *block,
+            uint16_t block_size)
 {
-  struct GNUNET_FS_PublishContext *sc = cls;
+  struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_FileInformation *p;
-  struct PutContCtx * dpc_cls;
   struct OnDemandBlock odb;
 
-  p = sc->fi_pos;
-  if (NULL == sc->dsh)
-    {
-#if DEBUG_PUBLISH
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                 "Waiting for datastore connection\n");
-#endif
-      sc->upload_task
-       = GNUNET_SCHEDULER_add_with_priority (sc->h->sched,
-                                             GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
-                                             &GNUNET_FS_publish_main_,
-                                             sc);
-      return;
-    }
-  
-  GNUNET_assert (GNUNET_NO == sc->in_network_wait);
-  sc->in_network_wait = GNUNET_YES;
-  dpc_cls = GNUNET_malloc(sizeof(struct PutContCtx));
-  dpc_cls->cont = &GNUNET_FS_publish_main_;
-  dpc_cls->cont_cls = sc;
-  dpc_cls->sc = sc;
-  dpc_cls->p = p;
-  if ( (! p->is_directory) &&
+  p = pc->fi_pos;
+  if (NULL == pc->dsh)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Waiting for datastore connection\n");
+    GNUNET_assert (NULL == pc->upload_task);
+    pc->upload_task =
+        GNUNET_SCHEDULER_add_with_priority
+        (GNUNET_SCHEDULER_PRIORITY_BACKGROUND, &GNUNET_FS_publish_main_, pc);
+    return;
+  }
+
+  if ( (GNUNET_YES != p->is_directory) &&
        (GNUNET_YES == p->data.file.do_index) &&
-       (type == GNUNET_BLOCK_TYPE_FS_DBLOCK) )
-    {
-#if DEBUG_PUBLISH
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                 "Indexing block `%s' for offset %llu with index size %u\n",
-                 GNUNET_h2s (query),
-                 (unsigned long long) offset,
-                 sizeof (struct OnDemandBlock));
-#endif
-      odb.offset = GNUNET_htonll (offset);
-      odb.file_id = p->data.file.file_id;
-      GNUNET_DATASTORE_put (sc->dsh,
-                           (p->is_directory) ? 0 : sc->rid,
-                           query,
-                           sizeof(struct OnDemandBlock),
-                           &odb,
-                           GNUNET_BLOCK_TYPE_FS_ONDEMAND,
-                           p->priority,
-                           p->anonymity,
-                           p->expirationTime,
-                           -2, 1,
-                           GNUNET_CONSTANTS_SERVICE_TIMEOUT,
-                           &ds_put_cont,
-                           dpc_cls);     
-      return;
-    }
-#if DEBUG_PUBLISH
+       (GNUNET_BLOCK_TYPE_FS_DBLOCK == type) )
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Indexing block `%s' for offset %llu with index size %u\n",
+                GNUNET_h2s (&chk->query),
+                (unsigned long long) offset,
+                (unsigned int) sizeof (struct OnDemandBlock));
+    odb.offset = GNUNET_htonll (offset);
+    odb.file_id = p->data.file.file_id;
+    GNUNET_assert (pc->qre == NULL);
+    pc->qre =
+        GNUNET_DATASTORE_put (pc->dsh,
+                              (p->is_directory == GNUNET_YES) ? 0 : pc->rid,
+                              &chk->query,
+                              sizeof (struct OnDemandBlock),
+                              &odb,
+                              GNUNET_BLOCK_TYPE_FS_ONDEMAND,
+                              p->bo.content_priority,
+                              p->bo.anonymity_level,
+                              p->bo.replication_level,
+                              p->bo.expiration_time,
+                              -2, 1,
+                              &ds_put_cont, pc);
+    return;
+  }
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-             "Publishing block `%s' for offset %llu with size %u\n",
-             GNUNET_h2s (query),
-             (unsigned long long) offset,
-             (unsigned int) block_size);
-#endif
-  GNUNET_DATASTORE_put (sc->dsh,
-                       (p->is_directory) ? 0 : sc->rid,
-                       query,
-                       block_size,
-                       block,
-                       type,
-                       p->priority,
-                       p->anonymity,
-                       p->expirationTime,
-                       -2, 1,
-                       GNUNET_CONSTANTS_SERVICE_TIMEOUT,
-                       &ds_put_cont,
-                       dpc_cls);
+              "Publishing block `%s' for offset %llu with size %u\n",
+              GNUNET_h2s (&chk->query),
+              (unsigned long long) offset,
+              (unsigned int) block_size);
+  GNUNET_assert (pc->qre == NULL);
+  pc->qre =
+      GNUNET_DATASTORE_put (pc->dsh, (p->is_directory == GNUNET_YES) ? 0 : pc->rid,
+                            &chk->query,
+                            block_size,
+                            block,
+                            type,
+                            p->bo.content_priority,
+                            p->bo.anonymity_level,
+                            p->bo.replication_level,
+                            p->bo.expiration_time,
+                            -2, 1,
+                            &ds_put_cont,
+                            pc);
 }
 
 
@@ -611,27 +553,44 @@ block_proc (void *cls,
  * @param cls closure
  * @param offset where are we in the file
  * @param pt_block plaintext of the currently processed block
- * @param pt_size size of pt_block
- * @param depth depth of the block in the tree
+ * @param pt_size size of @a pt_block
+ * @param depth depth of the block in the tree, 0 for DBLOCK
  */
-static void 
-progress_proc (void *cls,
-              uint64_t offset,
-              const void *pt_block,
-              size_t pt_size,
-              unsigned int depth)
-{                     
-  struct GNUNET_FS_PublishContext *sc = cls;
+static void
+progress_proc (void *cls, uint64_t offset,
+               const void *pt_block,
+               size_t pt_size,
+               unsigned int depth)
+{
+  struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_FileInformation *p;
+  struct GNUNET_FS_FileInformation *par;
   struct GNUNET_FS_ProgressInfo pi;
 
-  p = sc->fi_pos;
+  p = pc->fi_pos;
   pi.status = GNUNET_FS_STATUS_PUBLISH_PROGRESS;
   pi.value.publish.specifics.progress.data = pt_block;
   pi.value.publish.specifics.progress.offset = offset;
   pi.value.publish.specifics.progress.data_len = pt_size;
   pi.value.publish.specifics.progress.depth = depth;
-  p->client_info = GNUNET_FS_publish_make_status_ (&pi, sc, p, offset);
+  p->client_info = GNUNET_FS_publish_make_status_ (&pi, pc, p, offset);
+  if ( (0 != depth) ||
+       (GNUNET_YES == p->is_directory) )
+    return;
+  while (NULL != (par = p->dir))
+  {
+    p = par;
+    GNUNET_assert (GNUNET_YES == par->is_directory);
+    p->data.dir.contents_completed += pt_size;
+    pi.status = GNUNET_FS_STATUS_PUBLISH_PROGRESS_DIRECTORY;
+    pi.value.publish.specifics.progress_directory.completed = p->data.dir.contents_completed;
+    pi.value.publish.specifics.progress_directory.total = p->data.dir.contents_size;
+    pi.value.publish.specifics.progress_directory.eta = GNUNET_TIME_calculate_eta (p->start_time,
+                                                                                   p->data.dir.contents_completed,
+                                                                                   p->data.dir.contents_size);
+    p->client_info = GNUNET_FS_publish_make_status_ (&pi, pc, p, 0);
+
+  }
 }
 
 
@@ -640,10 +599,10 @@ progress_proc (void *cls,
  * block into memory, encrypt it and send it to the FS service.  Then
  * continue with the main task.
  *
- * @param sc overall upload data
+ * @param pc overall upload data
  */
 static void
-publish_content (struct GNUNET_FS_PublishContext *sc) 
+publish_content (struct GNUNET_FS_PublishContext *pc)
 {
   struct GNUNET_FS_FileInformation *p;
   char *emsg;
@@ -652,132 +611,171 @@ publish_content (struct GNUNET_FS_PublishContext *sc)
   void *raw_data;
   uint64_t size;
 
-  p = sc->fi_pos;
-  GNUNET_assert (p != NULL);
+  p = pc->fi_pos;
+  GNUNET_assert (NULL != p);
   if (NULL == p->te)
+  {
+    if (GNUNET_YES == p->is_directory)
     {
-      if (p->is_directory)
-       {
-#if DEBUG_PUBLISH
-         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                     "Creating directory\n");
-#endif
-         db = GNUNET_FS_directory_builder_create (p->meta);
-         dirpos = p->data.dir.entries;
-         while (NULL != dirpos)
-           {
-             if (dirpos->is_directory)
-               {
-                 raw_data = dirpos->data.dir.dir_data;
-                 dirpos->data.dir.dir_data = NULL;
-               }
-             else
-               {
-                 raw_data = NULL;
-                 if ( (dirpos->data.file.file_size < MAX_INLINE_SIZE) &&
-                      (dirpos->data.file.file_size > 0) )
-                   {
-                     raw_data = GNUNET_malloc (dirpos->data.file.file_size);
-                     emsg = NULL;
-                     if (dirpos->data.file.file_size !=
-                         dirpos->data.file.reader (dirpos->data.file.reader_cls,
-                                                   0,
-                                                   dirpos->data.file.file_size,
-                                                   raw_data,
-                                                   &emsg))
-                       {
-                         GNUNET_free_non_null (emsg);
-                         GNUNET_free (raw_data);
-                         raw_data = NULL;
-                       } 
-                   }
-               }
-             GNUNET_FS_directory_builder_add (db,
-                                              dirpos->chk_uri,
-                                              dirpos->meta,
-                                              raw_data);
-             GNUNET_free_non_null (raw_data);
-             dirpos = dirpos->next;
-           }
-         GNUNET_FS_directory_builder_finish (db,
-                                             &p->data.dir.dir_size,
-                                             &p->data.dir.dir_data);
-         GNUNET_FS_file_information_sync_ (p);
-       }
-      size = (p->is_directory) 
-       ? p->data.dir.dir_size 
-       : p->data.file.file_size;
-#if DEBUG_PUBLISH
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                 "Creating tree encoder\n");
-#endif
-      p->te = GNUNET_FS_tree_encoder_create (sc->h,
-                                            size,
-                                            sc,
-                                            &block_reader,
-                                            &block_proc,
-                                            &progress_proc,
-                                            &encode_cont);
-
+      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Creating directory\n");
+      db = GNUNET_FS_directory_builder_create (p->meta);
+      dirpos = p->data.dir.entries;
+      while (NULL != dirpos)
+      {
+        if (GNUNET_YES == dirpos->is_directory)
+        {
+          raw_data = dirpos->data.dir.dir_data;
+          dirpos->data.dir.dir_data = NULL;
+        }
+        else
+        {
+          raw_data = NULL;
+          if ((dirpos->data.file.file_size < MAX_INLINE_SIZE) &&
+              (dirpos->data.file.file_size > 0))
+          {
+            raw_data = GNUNET_malloc (dirpos->data.file.file_size);
+            emsg = NULL;
+            if (dirpos->data.file.file_size !=
+                dirpos->data.file.reader (dirpos->data.file.reader_cls, 0,
+                                          dirpos->data.file.file_size, raw_data,
+                                          &emsg))
+            {
+              GNUNET_free_non_null (emsg);
+              GNUNET_free (raw_data);
+              raw_data = NULL;
+            }
+           dirpos->data.file.reader (dirpos->data.file.reader_cls, UINT64_MAX, 0, 0, NULL);
+          }
+        }
+        GNUNET_FS_directory_builder_add (db, dirpos->chk_uri, dirpos->meta,
+                                         raw_data);
+        GNUNET_free_non_null (raw_data);
+        dirpos = dirpos->next;
+      }
+      GNUNET_free_non_null (p->data.dir.dir_data);
+      p->data.dir.dir_data = NULL;
+      p->data.dir.dir_size = 0;
+      GNUNET_FS_directory_builder_finish (db, &p->data.dir.dir_size,
+                                          &p->data.dir.dir_data);
+      GNUNET_FS_file_information_sync_ (p);
     }
-#if DEBUG_PUBLISH
+    size = (GNUNET_YES == p->is_directory) ? p->data.dir.dir_size : p->data.file.file_size;
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+               "Creating tree encoder\n");
+    p->te =
+        GNUNET_FS_tree_encoder_create (pc->h, size, pc, &block_reader,
+                                       &block_proc, &progress_proc,
+                                       &encode_cont);
+
+  }
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Processing next block from tree\n");
-#endif
   GNUNET_FS_tree_encoder_next (p->te);
 }
 
 
 /**
- * Process the response (or lack thereof) from
- * the "fs" service to our 'start index' request.
+ * Check the response from the "fs" service to our 'start index'
+ * request.
+ *
+ * @param cls closure (of type `struct GNUNET_FS_PublishContext *`)
+ * @param msg the response we got
+ */
+static int
+check_index_start_failed (void *cls,
+                          const struct GNUNET_MessageHeader *msg)
+{
+  size_t msize = ntohs (msg->size) - sizeof (*msg);
+  const char *emsg = (const char *) &msg[1];
+
+  if (emsg[msize - sizeof (struct GNUNET_MessageHeader) - 1] != '\0')
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  return GNUNET_OK;
+}
+
+
+/**
+ * Process the response from the "fs" service to our 'start index'
+ * request.
  *
- * @param cls closure (of type "struct GNUNET_FS_PublishContext*"_)
+ * @param cls closure (of type `struct GNUNET_FS_PublishContext *`)
  * @param msg the response we got
  */
 static void
-process_index_start_response (void *cls,
-                             const struct GNUNET_MessageHeader *msg)
+handle_index_start_failed (void *cls,
+                           const struct GNUNET_MessageHeader *msg)
 {
-  struct GNUNET_FS_PublishContext *sc = cls;
+  struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_FileInformation *p;
-  const char *emsg;
-  uint16_t msize;
+  const char *emsg = (const char *) &msg[1];
 
-  GNUNET_CLIENT_disconnect (sc->client, GNUNET_NO);
-  sc->client = NULL;
-  p = sc->fi_pos;
-  if (msg == NULL)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                 _("Can not index file `%s': %s.  Will try to insert instead.\n"),
-                 p->filename,
-                 _("timeout on index-start request to `fs' service"));
-      p->data.file.do_index = GNUNET_NO;
-      GNUNET_FS_file_information_sync_ (p);
-      publish_content (sc);
-      return;
-    }
-  if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_FS_INDEX_START_OK)
-    {
-      msize = ntohs (msg->size);
-      emsg = (const char *) &msg[1];
-      if ( (msize <= sizeof (struct GNUNET_MessageHeader)) ||
-          (emsg[msize - sizeof(struct GNUNET_MessageHeader) - 1] != '\0') )
-       emsg = gettext_noop ("unknown error");
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                 _("Can not index file `%s': %s.  Will try to insert instead.\n"),
-                 p->filename,
-                 gettext (emsg));
-      p->data.file.do_index = GNUNET_NO;
-      GNUNET_FS_file_information_sync_ (p);
-      publish_content (sc);
-      return;
-    }
+  GNUNET_MQ_destroy (pc->mq);
+  pc->mq = NULL;
+  p = pc->fi_pos;
+  GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+              _("Can not index file `%s': %s.  Will try to insert instead.\n"),
+              p->filename,
+              gettext (emsg));
+  p->data.file.do_index = GNUNET_NO;
+  GNUNET_FS_file_information_sync_ (p);
+  publish_content (pc);
+}
+
+
+/**
+ * Process the response from the "fs" service to our 'start index'
+ * request.
+ *
+ * @param cls closure (of type `struct GNUNET_FS_PublishContext *`)
+ * @param msg the response we got
+ */
+static void
+handle_index_start_ok (void *cls,
+                       const struct GNUNET_MessageHeader *msg)
+{
+  struct GNUNET_FS_PublishContext *pc = cls;
+  struct GNUNET_FS_FileInformation *p;
+
+  GNUNET_MQ_destroy (pc->mq);
+  pc->mq = NULL;
+  p = pc->fi_pos;
   p->data.file.index_start_confirmed = GNUNET_YES;
-  /* success! continue with indexing */
   GNUNET_FS_file_information_sync_ (p);
-  publish_content (sc);
+  publish_content (pc);
+}
+
+
+/**
+ * Generic error handler, called with the appropriate error code and
+ * the same closure specified at the creation of the message queue.
+ * Not every message queue implementation supports an error handler.
+ *
+ * @param cls closure with the `struct GNUNET_FS_PublishContext *`
+ * @param error error code
+ */
+static void
+index_mq_error_handler (void *cls,
+                        enum GNUNET_MQ_Error error)
+{
+  struct GNUNET_FS_PublishContext *pc = cls;
+  struct GNUNET_FS_FileInformation *p;
+
+  if (NULL != pc->mq)
+  {
+    GNUNET_MQ_destroy (pc->mq);
+    pc->mq = NULL;
+  }
+  p = pc->fi_pos;
+  GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+              _("Can not index file `%s': %s.  Will try to insert instead.\n"),
+              p->filename,
+              _("error on index-start request to `fs' service"));
+  p->data.file.do_index = GNUNET_NO;
+  GNUNET_FS_file_information_sync_ (p);
+  publish_content (pc);
 }
 
 
@@ -788,265 +786,372 @@ process_index_start_response (void *cls,
  * @param cls closure, our publishing context
  * @param res resulting hash, NULL on error
  */
-static void 
+static void
 hash_for_index_cb (void *cls,
-                  const GNUNET_HashCode *
-                  res)
+                  const struct GNUNET_HashCode *res)
 {
-  struct GNUNET_FS_PublishContext *sc = cls;
+  struct GNUNET_FS_PublishContext *pc = cls;
+  struct GNUNET_MQ_MessageHandler handlers[] = {
+    GNUNET_MQ_hd_fixed_size (index_start_ok,
+                             GNUNET_MESSAGE_TYPE_FS_INDEX_START_OK,
+                             struct GNUNET_MessageHeader,
+                             pc),
+    GNUNET_MQ_hd_var_size (index_start_failed,
+                           GNUNET_MESSAGE_TYPE_FS_INDEX_START_FAILED,
+                           struct GNUNET_MessageHeader,
+                           pc),
+    GNUNET_MQ_handler_end ()
+  };
   struct GNUNET_FS_FileInformation *p;
+  struct GNUNET_MQ_Envelope *env;
   struct IndexStartMessage *ism;
   size_t slen;
-  struct GNUNET_CLIENT_Connection *client;
   uint64_t dev;
   uint64_t ino;
   char *fn;
 
-  sc->fhc = NULL;
-  p = sc->fi_pos;
-  if (NULL == res) 
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                 _("Can not index file `%s': %s.  Will try to insert instead.\n"),
-                 p->filename,
-                 _("failed to compute hash"));
-      p->data.file.do_index = GNUNET_NO;
-      GNUNET_FS_file_information_sync_ (p);
-      publish_content (sc);
-      return;
-    }
+  pc->fhc = NULL;
+  p = pc->fi_pos;
+  if (NULL == res)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                _("Can not index file `%s': %s.  Will try to insert instead.\n"),
+                p->filename,
+               _("failed to compute hash"));
+    p->data.file.do_index = GNUNET_NO;
+    GNUNET_FS_file_information_sync_ (p);
+    publish_content (pc);
+    return;
+  }
   if (GNUNET_YES == p->data.file.index_start_confirmed)
-    {
-      publish_content (sc);
-      return;
-    }
+  {
+    publish_content (pc);
+    return;
+  }
   fn = GNUNET_STRINGS_filename_expand (p->filename);
   GNUNET_assert (fn != NULL);
   slen = strlen (fn) + 1;
-  if (slen >= GNUNET_SERVER_MAX_MESSAGE_SIZE - sizeof(struct IndexStartMessage))
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                 _("Can not index file `%s': %s.  Will try to insert instead.\n"),
-                 fn,
-                 _("filename too long"));
-      GNUNET_free (fn);
-      p->data.file.do_index = GNUNET_NO;
-      GNUNET_FS_file_information_sync_ (p);
-      publish_content (sc);
-      return;
-    }
-#if DEBUG_PUBLISH
+  if (slen >=
+      GNUNET_MAX_MESSAGE_SIZE - sizeof (struct IndexStartMessage))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                _
+                ("Can not index file `%s': %s.  Will try to insert instead.\n"),
+                fn, _("filename too long"));
+    GNUNET_free (fn);
+    p->data.file.do_index = GNUNET_NO;
+    GNUNET_FS_file_information_sync_ (p);
+    publish_content (pc);
+    return;
+  }
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-             "Hash of indexed file `%s' is `%s'\n",
-             p->filename,
-             GNUNET_h2s (res));
-#endif
-  client = GNUNET_CLIENT_connect (sc->h->sched,
-                                 "fs",
-                                 sc->h->cfg);
-  if (NULL == client)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                 _("Can not index file `%s': %s.  Will try to insert instead.\n"),
-                 p->filename,
-                 _("could not connect to `fs' service"));
-      p->data.file.do_index = GNUNET_NO;
-      publish_content (sc);
-      GNUNET_free (fn);
-      return;
-    }
+              "Hash of indexed file `%s' is `%s'\n",
+              p->filename,
+              GNUNET_h2s (res));
+  if (0 != (pc->options & GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY))
+  {
+    p->data.file.file_id = *res;
+    p->data.file.have_hash = GNUNET_YES;
+    p->data.file.index_start_confirmed = GNUNET_YES;
+    GNUNET_FS_file_information_sync_ (p);
+    publish_content (pc);
+    GNUNET_free (fn);
+    return;
+  }
+  pc->mq = GNUNET_CLIENT_connect (pc->h->cfg,
+                                  "fs",
+                                  handlers,
+                                  &index_mq_error_handler,
+                                  pc);
+  if (NULL == pc->mq)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                _("Can not index file `%s': %s.  Will try to insert instead.\n"),
+                p->filename,
+               _("could not connect to `fs' service"));
+    p->data.file.do_index = GNUNET_NO;
+    publish_content (pc);
+    GNUNET_free (fn);
+    return;
+  }
   if (p->data.file.have_hash != GNUNET_YES)
-    {
-      p->data.file.file_id = *res;
-      p->data.file.have_hash = GNUNET_YES;
-      GNUNET_FS_file_information_sync_ (p);
-    }
-  ism = GNUNET_malloc (sizeof(struct IndexStartMessage) +
-                      slen);
-  ism->header.size = htons(sizeof(struct IndexStartMessage) +
-                          slen);
-  ism->header.type = htons(GNUNET_MESSAGE_TYPE_FS_INDEX_START);
+  {
+    p->data.file.file_id = *res;
+    p->data.file.have_hash = GNUNET_YES;
+    GNUNET_FS_file_information_sync_ (p);
+  }
+  env = GNUNET_MQ_msg_extra (ism,
+                             slen,
+                             GNUNET_MESSAGE_TYPE_FS_INDEX_START);
   if (GNUNET_OK ==
       GNUNET_DISK_file_get_identifiers (p->filename,
-                                       &dev,
-                                       &ino))
-    {
-      ism->device = GNUNET_htonll (dev);
-      ism->inode = GNUNET_htonll(ino);
-    }
-#if DEBUG_PUBLISH
+                                        &dev,
+                                        &ino))
+  {
+    ism->device = GNUNET_htonll (dev);
+    ism->inode = GNUNET_htonll (ino);
+  }
   else
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                 _("Failed to get file identifiers for `%s'\n"),
-                 p->filename);
-    }
-#endif
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                _("Failed to get file identifiers for `%s'\n"),
+                p->filename);
+  }
   ism->file_id = *res;
-  memcpy (&ism[1],
-         fn,
-         slen);
+  GNUNET_memcpy (&ism[1],
+          fn,
+          slen);
   GNUNET_free (fn);
-  sc->client = client;
-  GNUNET_break (GNUNET_YES ==
-               GNUNET_CLIENT_transmit_and_get_response (client,
-                                                        &ism->header,
-                                                        GNUNET_TIME_UNIT_FOREVER_REL,
-                                                        GNUNET_YES,
-                                                        &process_index_start_response,
-                                                        sc));
-  GNUNET_free (ism);
+  GNUNET_MQ_send (pc->mq,
+                  env);
+}
+
+
+/**
+ * We've computed the CHK/LOC URI, now publish the KSKs (if applicable).
+ *
+ * @param pc publishing context to do this for
+ */
+static void
+publish_kblocks (struct GNUNET_FS_PublishContext *pc)
+{
+  struct GNUNET_FS_FileInformation *p;
+
+  p = pc->fi_pos;
+  /* upload of "p" complete, publish KBlocks! */
+  if (NULL != p->keywords)
+  {
+    pc->ksk_pc = GNUNET_FS_publish_ksk (pc->h,
+                                        p->keywords,
+                                        p->meta,
+                                        p->chk_uri,
+                                        &p->bo,
+                                        pc->options,
+                                        &publish_kblocks_cont,
+                                        pc);
+  }
+  else
+  {
+    publish_kblocks_cont (pc, p->chk_uri, NULL);
+  }
+}
+
+
+/**
+ * Process the response from the "fs" service to our LOC sign request.
+ *
+ * @param cls closure (of type `struct GNUNET_FS_PublishContext *`)
+ * @param sig the response we got
+ */
+static void
+handle_signature_response (void *cls,
+                           const struct ResponseLocSignatureMessage *sig)
+{
+  struct GNUNET_FS_PublishContext *pc = cls;
+  struct GNUNET_FS_FileInformation *p;
+
+  p = pc->fi_pos;
+  p->chk_uri->type = GNUNET_FS_URI_LOC;
+  /* p->data.loc.fi kept from CHK before */
+  p->chk_uri->data.loc.peer = sig->peer;
+  p->chk_uri->data.loc.expirationTime
+    = GNUNET_TIME_absolute_ntoh (sig->expiration_time);
+  p->chk_uri->data.loc.contentSignature = sig->signature;
+  GNUNET_FS_file_information_sync_ (p);
+  GNUNET_FS_publish_sync_ (pc);
+  publish_kblocks (pc);
+}
+
+
+/**
+ * Generic error handler, called with the appropriate error code and
+ * the same closure specified at the creation of the message queue.
+ * Not every message queue implementation supports an error handler.
+ *
+ * @param cls closure with the `struct GNUNET_FS_PublishContext *`
+ * @param error error code
+ */
+static void
+loc_mq_error_handler (void *cls,
+                      enum GNUNET_MQ_Error error)
+{
+  struct GNUNET_FS_PublishContext *pc = cls;
+
+  if (NULL != pc->mq)
+  {
+    GNUNET_MQ_destroy (pc->mq);
+    pc->mq = NULL;
+  }
+  GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+              _("Can not create LOC URI. Will continue with CHK instead.\n"));
+  publish_kblocks (pc);
+}
+
+
+/**
+ * We're publishing without anonymity. Contact the FS service
+ * to create a signed LOC URI for further processing, then
+ * continue with KSKs.
+ *
+ * @param pc the publishing context do to this for
+ */
+static void
+create_loc_uri (struct GNUNET_FS_PublishContext *pc)
+{
+  struct GNUNET_MQ_MessageHandler handlers[] = {
+    GNUNET_MQ_hd_fixed_size (signature_response,
+                             GNUNET_MESSAGE_TYPE_FS_REQUEST_LOC_SIGNATURE,
+                             struct ResponseLocSignatureMessage,
+                             pc),
+    GNUNET_MQ_handler_end ()
+  };
+  struct GNUNET_MQ_Envelope *env;
+  struct RequestLocSignatureMessage *req;
+  struct GNUNET_FS_FileInformation *p;
+
+  if (NULL != pc->mq)
+    GNUNET_MQ_destroy (pc->mq);
+  pc->mq = GNUNET_CLIENT_connect (pc->h->cfg,
+                                  "fs",
+                                  handlers,
+                                  &loc_mq_error_handler,
+                                  pc);
+  if (NULL == pc->mq)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                _("Can not create LOC URI. Will continue with CHK instead.\n"));
+    publish_kblocks (pc);
+    return;
+  }
+  p = pc->fi_pos;
+  env = GNUNET_MQ_msg (req,
+                       GNUNET_MESSAGE_TYPE_FS_REQUEST_LOC_SIGN);
+  req->purpose = htonl (GNUNET_SIGNATURE_PURPOSE_PEER_PLACEMENT);
+  req->expiration_time = GNUNET_TIME_absolute_hton (p->bo.expiration_time);
+  req->chk = p->chk_uri->data.chk.chk;
+  req->file_length = GNUNET_htonll (p->chk_uri->data.chk.file_length);
+  GNUNET_MQ_send (pc->mq,
+                  env);
 }
 
 
 /**
  * Main function that performs the upload.
  *
- * @param cls "struct GNUNET_FS_PublishContext" identifies the upload
- * @param tc task context
+ * @param cls `struct GNUNET_FS_PublishContext *` identifies the upload
  */
 void
-GNUNET_FS_publish_main_ (void *cls,
-                        const struct GNUNET_SCHEDULER_TaskContext *tc)
+GNUNET_FS_publish_main_ (void *cls)
 {
   struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_ProgressInfo pi;
   struct GNUNET_FS_FileInformation *p;
-  struct GNUNET_FS_Uri *loc;
   char *fn;
 
-  pc->upload_task = GNUNET_SCHEDULER_NO_TASK;  
+  pc->upload_task = NULL;
   p = pc->fi_pos;
   if (NULL == p)
-    {
-#if DEBUG_PUBLISH
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                 "Publishing complete, now publishing SKS and KSK blocks.\n");
-#endif
-      /* upload of entire hierarchy complete,
-        publish namespace entries */
-      GNUNET_FS_publish_sync_ (pc);
-      publish_sblock (pc);
-      return;
-    }
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Publishing complete, now publishing SKS and KSK blocks.\n");
+    /* upload of entire hierarchy complete,
+     * publish namespace entries */
+    GNUNET_FS_publish_sync_ (pc);
+    publish_sblock (pc);
+    return;
+  }
   /* find starting position */
-  while ( (p->is_directory) &&
+  while ( (GNUNET_YES == p->is_directory) &&
          (NULL != p->data.dir.entries) &&
          (NULL == p->emsg) &&
          (NULL == p->data.dir.entries->chk_uri) )
-    {
-      p = p->data.dir.entries;
-      pc->fi_pos = p;
-      GNUNET_FS_publish_sync_ (pc);
-    }
+  {
+    p = p->data.dir.entries;
+    pc->fi_pos = p;
+    GNUNET_FS_publish_sync_ (pc);
+  }
   /* abort on error */
   if (NULL != p->emsg)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+               "Error uploading: %s\n",
+               p->emsg);
+    /* error with current file, abort all
+     * related files as well! */
+    while (NULL != p->dir)
     {
-#if DEBUG_PUBLISH
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                 "Error uploading: %s\n",
-                 p->emsg);
-#endif
-      /* error with current file, abort all
-        related files as well! */
-      while (NULL != p->dir)
-       {
-         fn = GNUNET_CONTAINER_meta_data_get_by_type (p->meta,
-                                                      EXTRACTOR_METATYPE_FILENAME);
-         p = p->dir;
-         if (fn != NULL)
-           {
-             GNUNET_asprintf (&p->emsg, 
-                              _("Recursive upload failed at `%s': %s"),
-                              fn,
-                              p->emsg);
-             GNUNET_free (fn);
-           }
-         else
-           {
-             GNUNET_asprintf (&p->emsg, 
-                              _("Recursive upload failed: %s"),
-                              p->emsg);              
-           }
-         pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
-         pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
-         pi.value.publish.specifics.error.message = p->emsg;
-         p->client_info = GNUNET_FS_publish_make_status_ (&pi, pc, p, 0);
-       }
-      pc->all_done = GNUNET_YES;
-      GNUNET_FS_publish_sync_ (pc);
-      return;
+      fn = GNUNET_CONTAINER_meta_data_get_by_type (p->meta,
+                                                   EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME);
+      p = p->dir;
+      if (fn != NULL)
+      {
+        GNUNET_asprintf (&p->emsg,
+                         _("Recursive upload failed at `%s': %s"),
+                         fn,
+                         p->emsg);
+        GNUNET_free (fn);
+      }
+      else
+      {
+        GNUNET_asprintf (&p->emsg,
+                         _("Recursive upload failed: %s"),
+                         p->emsg);
+      }
+      pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
+      pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
+      pi.value.publish.specifics.error.message = p->emsg;
+      p->client_info = GNUNET_FS_publish_make_status_ (&pi, pc, p, 0);
     }
+    pc->all_done = GNUNET_YES;
+    GNUNET_FS_publish_sync_ (pc);
+    return;
+  }
   /* handle completion */
   if (NULL != p->chk_uri)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "File upload complete, now publishing KSK blocks.\n");
+    GNUNET_FS_publish_sync_ (pc);
+
+    if ( (0 == p->bo.anonymity_level) &&
+         (GNUNET_YES !=
+          GNUNET_FS_uri_test_loc (p->chk_uri)) )
     {
-#if DEBUG_PUBLISH
-      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                 "File upload complete, now publishing KSK blocks.\n");
-#endif
-      if (0 == p->anonymity)
-       {
-         /* zero anonymity, box CHK URI in LOC URI */
-         loc = GNUNET_FS_uri_loc_create (p->chk_uri,
-                                         pc->h->cfg,
-                                         p->expirationTime);
-         GNUNET_FS_uri_destroy (p->chk_uri);
-         p->chk_uri = loc;
-       }
-      GNUNET_FS_publish_sync_ (pc);
-      /* upload of "p" complete, publish KBlocks! */
-      if (p->keywords != NULL)
-       {
-         GNUNET_FS_publish_ksk (pc->h,
-                                p->keywords,
-                                p->meta,
-                                p->chk_uri,
-                                p->expirationTime,
-                                p->anonymity,
-                                p->priority,
-                                pc->options,
-                                &publish_kblocks_cont,
-                                pc);
-       }
-      else
-       {
-         publish_kblocks_cont (pc,
-                               p->chk_uri,
-                               NULL);
-       }
-      return;
+      /* zero anonymity, box CHK URI in LOC URI */
+      create_loc_uri (pc);
     }
-  if ( (!p->is_directory) &&
-       (p->data.file.do_index) )
+    else
     {
-      if (NULL == p->filename)
-       {
-         p->data.file.do_index = GNUNET_NO;
-         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                     _("Can not index file `%s': %s.  Will try to insert instead.\n"),
-                     "<no-name>",
-                     _("needs to be an actual file"));
-         GNUNET_FS_file_information_sync_ (p);
-         publish_content (pc);
-         return;
-       }      
-      if (p->data.file.have_hash)
-       {
-         hash_for_index_cb (pc,
-                            &p->data.file.file_id);
-       }
-      else
-       {
-         p->start_time = GNUNET_TIME_absolute_get ();
-         pc->fhc = GNUNET_CRYPTO_hash_file (pc->h->sched,
-                                            GNUNET_SCHEDULER_PRIORITY_IDLE,
-                                            p->filename,
-                                            HASHING_BLOCKSIZE,
-                                            &hash_for_index_cb,
-                                            pc);
-       }
+      publish_kblocks (pc);
+    }
+    return;
+  }
+  if ((GNUNET_YES != p->is_directory) && (p->data.file.do_index))
+  {
+    if (NULL == p->filename)
+    {
+      p->data.file.do_index = GNUNET_NO;
+      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                  _("Can not index file `%s': %s.  Will try to insert instead.\n"),
+                  "<no-name>",
+                  _("needs to be an actual file"));
+      GNUNET_FS_file_information_sync_ (p);
+      publish_content (pc);
       return;
     }
+    if (p->data.file.have_hash)
+    {
+      hash_for_index_cb (pc, &p->data.file.file_id);
+    }
+    else
+    {
+      p->start_time = GNUNET_TIME_absolute_get ();
+      pc->fhc =
+          GNUNET_CRYPTO_hash_file (GNUNET_SCHEDULER_PRIORITY_IDLE, p->filename,
+                                   HASHING_BLOCKSIZE, &hash_for_index_cb, pc);
+    }
+    return;
+  }
   publish_content (pc);
 }
 
@@ -1055,114 +1160,166 @@ GNUNET_FS_publish_main_ (void *cls,
  * Signal the FS's progress function that we are starting
  * an upload.
  *
- * @param cls closure (of type "struct GNUNET_FS_PublishContext*")
+ * @param cls closure (of type `struct GNUNET_FS_PublishContext *`)
  * @param fi the entry in the publish-structure
  * @param length length of the file or directory
  * @param meta metadata for the file or directory (can be modified)
  * @param uri pointer to the keywords that will be used for this entry (can be modified)
- * @param anonymity pointer to selected anonymity level (can be modified)
- * @param priority pointer to selected priority (can be modified)
+ * @param bo block options
  * @param do_index should we index?
- * @param expirationTime pointer to selected expiration time (can be modified)
  * @param client_info pointer to client context set upon creation (can be modified)
- * @return GNUNET_OK to continue (always)
+ * @return #GNUNET_OK to continue (always)
  */
 static int
-fip_signal_start(void *cls,
-                struct GNUNET_FS_FileInformation *fi,
-                uint64_t length,
-                struct GNUNET_CONTAINER_MetaData *meta,
-                struct GNUNET_FS_Uri **uri,
-                uint32_t *anonymity,
-                uint32_t *priority,
-                int *do_index,
-                struct GNUNET_TIME_Absolute *expirationTime,
-                void **client_info)
+fip_signal_start (void *cls,
+                 struct GNUNET_FS_FileInformation *fi,
+                  uint64_t length,
+                 struct GNUNET_CONTAINER_MetaData *meta,
+                  struct GNUNET_FS_Uri **uri,
+                 struct GNUNET_FS_BlockOptions *bo,
+                  int *do_index,
+                 void **client_info)
 {
-  struct GNUNET_FS_PublishContext *sc = cls;
+  struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_ProgressInfo pi;
   unsigned int kc;
   uint64_t left;
 
+  if (GNUNET_YES == pc->skip_next_fi_callback)
+  {
+    pc->skip_next_fi_callback = GNUNET_NO;
+    return GNUNET_OK;
+  }
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+             "Starting publish operation\n");
   if (*do_index)
-    {
-      /* space for on-demand blocks */
-      sc->reserve_space += ((length + DBLOCK_SIZE - 1) / DBLOCK_SIZE) * sizeof (struct OnDemandBlock);
-    }
+  {
+    /* space for on-demand blocks */
+    pc->reserve_space +=
+        ((length + DBLOCK_SIZE -
+          1) / DBLOCK_SIZE) * sizeof (struct OnDemandBlock);
+  }
   else
-    {
-      /* space for DBlocks */
-      sc->reserve_space += length;
-    }
+  {
+    /* space for DBlocks */
+    pc->reserve_space += length;
+  }
   /* entries for IBlocks and DBlocks, space for IBlocks */
   left = length;
   while (1)
-    {
-      left = (left + DBLOCK_SIZE - 1) / DBLOCK_SIZE;
-      sc->reserve_entries += left;
-      if (left <= 1)
-       break;
-      left = left * sizeof (struct ContentHashKey);
-      sc->reserve_space += left;
-    }
-  sc->reserve_entries++;
+  {
+    left = (left + DBLOCK_SIZE - 1) / DBLOCK_SIZE;
+    pc->reserve_entries += left;
+    if (left <= 1)
+      break;
+    left = left * sizeof (struct ContentHashKey);
+    pc->reserve_space += left;
+  }
+  pc->reserve_entries++;
   /* entries and space for keywords */
   if (NULL != *uri)
-    {
-      kc = GNUNET_FS_uri_ksk_get_keyword_count (*uri);
-      sc->reserve_entries += kc;
-      sc->reserve_space += GNUNET_SERVER_MAX_MESSAGE_SIZE * kc;
-    }  
+  {
+    kc = GNUNET_FS_uri_ksk_get_keyword_count (*uri);
+    pc->reserve_entries += kc;
+    pc->reserve_space += GNUNET_MAX_MESSAGE_SIZE * kc;
+  }
   pi.status = GNUNET_FS_STATUS_PUBLISH_START;
-  *client_info = GNUNET_FS_publish_make_status_ (&pi, sc, fi, 0);
+  *client_info = GNUNET_FS_publish_make_status_ (&pi, pc, fi, 0);
   GNUNET_FS_file_information_sync_ (fi);
+  if ((fi->is_directory) && (fi->dir != NULL))
+  {
+    /* We are a directory, and we are not top-level; process entries in directory */
+    pc->skip_next_fi_callback = GNUNET_YES;
+    GNUNET_FS_file_information_inspect (fi, &fip_signal_start, pc);
+  }
   return GNUNET_OK;
 }
 
 
 /**
- * Signal the FS's progress function that we are suspending
+ * Actually signal the FS's progress function that we are suspending
  * an upload.
  *
- * @param cls closure (of type "struct GNUNET_FS_PublishContext*")
+ * @param fi the entry in the publish-structure
+ * @param pc the publish context of which a file is being suspended
+ */
+static void
+suspend_operation (struct GNUNET_FS_FileInformation *fi,
+                  struct GNUNET_FS_PublishContext *pc)
+{
+  struct GNUNET_FS_ProgressInfo pi;
+  uint64_t off;
+
+  if (NULL != pc->ksk_pc)
+  {
+    GNUNET_FS_publish_ksk_cancel (pc->ksk_pc);
+    pc->ksk_pc = NULL;
+  }
+  if (NULL != pc->sks_pc)
+  {
+    GNUNET_FS_publish_sks_cancel (pc->sks_pc);
+    pc->sks_pc = NULL;
+  }
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+             "Suspending publish operation\n");
+  GNUNET_free_non_null (fi->serialization);
+  fi->serialization = NULL;
+  off = (NULL == fi->chk_uri) ? 0 : (GNUNET_YES == fi->is_directory) ? fi->data.dir.dir_size : fi->data.file.file_size;
+  pi.status = GNUNET_FS_STATUS_PUBLISH_SUSPEND;
+  GNUNET_break (NULL == GNUNET_FS_publish_make_status_ (&pi, pc, fi, off));
+  if (NULL != pc->qre)
+  {
+    GNUNET_DATASTORE_cancel (pc->qre);
+    pc->qre = NULL;
+  }
+  if (NULL != pc->dsh)
+  {
+    GNUNET_DATASTORE_disconnect (pc->dsh, GNUNET_NO);
+    pc->dsh = NULL;
+  }
+  pc->rid = 0;
+}
+
+
+/**
+ * Signal the FS's progress function that we are suspending
+ * an upload.  Performs the recursion.
+ *
+ * @param cls closure (of type `struct GNUNET_FS_PublishContext *`)
  * @param fi the entry in the publish-structure
  * @param length length of the file or directory
  * @param meta metadata for the file or directory (can be modified)
  * @param uri pointer to the keywords that will be used for this entry (can be modified)
- * @param anonymity pointer to selected anonymity level (can be modified)
- * @param priority pointer to selected priority (can be modified)
+ * @param bo block options
  * @param do_index should we index?
- * @param expirationTime pointer to selected expiration time (can be modified)
  * @param client_info pointer to client context set upon creation (can be modified)
- * @return GNUNET_OK to continue (always)
+ * @return #GNUNET_OK to continue (always)
  */
 static int
-fip_signal_suspend(void *cls,
-                  struct GNUNET_FS_FileInformation *fi,
-                  uint64_t length,
-                  struct GNUNET_CONTAINER_MetaData *meta,
-                  struct GNUNET_FS_Uri **uri,
-                  uint32_t *anonymity,
-                  uint32_t *priority,
-                  int *do_index,
-                  struct GNUNET_TIME_Absolute *expirationTime,
-                  void **client_info)
+fip_signal_suspend (void *cls,
+                   struct GNUNET_FS_FileInformation *fi,
+                    uint64_t length,
+                   struct GNUNET_CONTAINER_MetaData *meta,
+                    struct GNUNET_FS_Uri **uri,
+                    struct GNUNET_FS_BlockOptions *bo,
+                   int *do_index,
+                    void **client_info)
 {
-  struct GNUNET_FS_PublishContext*sc = cls;
-  struct GNUNET_FS_ProgressInfo pi;
-  uint64_t off;
+  struct GNUNET_FS_PublishContext *pc = cls;
 
-  GNUNET_free_non_null (fi->serialization);
-  fi->serialization = NULL;    
-  off = (fi->chk_uri == NULL) ? 0 : length;
-  pi.status = GNUNET_FS_STATUS_PUBLISH_SUSPEND;
-  GNUNET_break (NULL == GNUNET_FS_publish_make_status_ (&pi, sc, fi, off));
+  if (GNUNET_YES == pc->skip_next_fi_callback)
+  {
+    pc->skip_next_fi_callback = GNUNET_NO;
+    return GNUNET_OK;
+  }
+  if (GNUNET_YES == GNUNET_FS_meta_data_test_for_directory (meta))
+  {
+    /* process entries in directory */
+    pc->skip_next_fi_callback = GNUNET_YES;
+    GNUNET_FS_file_information_inspect (fi, &fip_signal_suspend, pc);
+  }
+  suspend_operation (fi, pc);
   *client_info = NULL;
-  if (NULL != sc->dsh)
-    {
-      GNUNET_DATASTORE_disconnect (sc->dsh, GNUNET_NO);
-      sc->dsh = NULL;
-    }
   return GNUNET_OK;
 }
 
@@ -1171,59 +1328,80 @@ fip_signal_suspend(void *cls,
  * Create SUSPEND event for the given publish operation
  * and then clean up our state (without stop signal).
  *
- * @param cls the 'struct GNUNET_FS_PublishContext' to signal for
+ * @param cls the `struct GNUNET_FS_PublishContext` to signal for
  */
 void
 GNUNET_FS_publish_signal_suspend_ (void *cls)
 {
   struct GNUNET_FS_PublishContext *pc = cls;
 
-  if (GNUNET_SCHEDULER_NO_TASK != pc->upload_task)
-    {
-      GNUNET_SCHEDULER_cancel (pc->h->sched, pc->upload_task);
-      pc->upload_task = GNUNET_SCHEDULER_NO_TASK;
-    }
-  GNUNET_FS_file_information_inspect (pc->fi,
-                                     &fip_signal_suspend,
-                                     pc);
+  if (NULL != pc->upload_task)
+  {
+    GNUNET_SCHEDULER_cancel (pc->upload_task);
+    pc->upload_task = NULL;
+  }
+  pc->skip_next_fi_callback = GNUNET_YES;
+  GNUNET_FS_file_information_inspect (pc->fi, &fip_signal_suspend, pc);
+  suspend_operation (pc->fi, pc);
   GNUNET_FS_end_top (pc->h, pc->top);
-  publish_cleanup (pc, NULL);
+  pc->top = NULL;
+  publish_cleanup (pc);
 }
 
 
 /**
  * We have gotten a reply for our space reservation request.
  * Either fail (insufficient space) or start publishing for good.
- * 
- * @param cls the 'struct GNUNET_FS_PublishContext*'
+ *
+ * @param cls the `struct GNUNET_FS_PublishContext *`
  * @param success positive reservation ID on success
+ * @param min_expiration minimum expiration time required for content to be stored
  * @param msg error message on error, otherwise NULL
  */
 static void
 finish_reserve (void *cls,
-               int success,
+                int success,
+               struct GNUNET_TIME_Absolute min_expiration,
                const char *msg)
 {
   struct GNUNET_FS_PublishContext *pc = cls;
 
   pc->qre = NULL;
-  if ( (msg != NULL) ||
-       (success <= 0) )
-    {
-      GNUNET_asprintf (&pc->fi->emsg, 
-                      _("Insufficient space for publishing: %s"),
-                      msg);
-      signal_publish_error (pc->fi,
-                           pc,
-                           pc->fi->emsg);
-      return;
-    }
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Reservation complete (%d)!\n",
+              success);
+  if ((msg != NULL) || (success <= 0))
+  {
+    GNUNET_asprintf (&pc->fi->emsg,
+                    _("Datastore failure: %s"),
+                     msg);
+    signal_publish_error (pc->fi, pc, pc->fi->emsg);
+    return;
+  }
   pc->rid = success;
-  pc->upload_task 
-    = GNUNET_SCHEDULER_add_with_priority (pc->h->sched,
-                                         GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
-                                         &GNUNET_FS_publish_main_,
-                                         pc);
+  GNUNET_assert (NULL == pc->upload_task);
+  pc->upload_task =
+      GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
+                                          &GNUNET_FS_publish_main_, pc);
+}
+
+
+/**
+ * Calculate the total size of all of the files in the directory structure.
+ *
+ * @param fi file structure to traverse
+ */
+static uint64_t
+compute_contents_size (struct GNUNET_FS_FileInformation *fi)
+{
+  struct GNUNET_FS_FileInformation *ent;
+
+  if (GNUNET_YES != fi->is_directory)
+    return fi->data.file.file_size;
+  fi->data.dir.contents_size = 0;
+  for (ent = fi->data.dir.entries; NULL != ent; ent = ent->next)
+    fi->data.dir.contents_size += compute_contents_size (ent);
+  return fi->data.dir.contents_size;
 }
 
 
@@ -1232,80 +1410,76 @@ finish_reserve (void *cls,
  *
  * @param h handle to the file sharing subsystem
  * @param fi information about the file or directory structure to publish
- * @param namespace namespace to publish the file in, NULL for no namespace
+ * @param ns namespace to publish the file in, NULL for no namespace
  * @param nid identifier to use for the publishd content in the namespace
  *        (can be NULL, must be NULL if namespace is NULL)
- * @param nuid update-identifier that will be used for future updates 
+ * @param nuid update-identifier that will be used for future updates
  *        (can be NULL, must be NULL if namespace or nid is NULL)
- * @param options options for the publication 
+ * @param options options for the publication
  * @return context that can be used to control the publish operation
  */
 struct GNUNET_FS_PublishContext *
 GNUNET_FS_publish_start (struct GNUNET_FS_Handle *h,
-                        struct GNUNET_FS_FileInformation *fi,
-                        struct GNUNET_FS_Namespace *namespace,
+                         struct GNUNET_FS_FileInformation *fi,
+                         const struct GNUNET_CRYPTO_EcdsaPrivateKey *ns,
                         const char *nid,
-                        const char *nuid,
-                        enum GNUNET_FS_PublishOptions options)
+                         const char *nuid,
+                         enum GNUNET_FS_PublishOptions options)
 {
   struct GNUNET_FS_PublishContext *ret;
   struct GNUNET_DATASTORE_Handle *dsh;
 
   GNUNET_assert (NULL != h);
+  compute_contents_size (fi);
   if (0 == (options & GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY))
-    {
-      dsh = GNUNET_DATASTORE_connect (h->cfg,
-                                     h->sched);
-      if (NULL == dsh)
-       return NULL;
-    }
+  {
+    dsh = GNUNET_DATASTORE_connect (h->cfg);
+    if (NULL == dsh)
+      return NULL;
+  }
   else
-    {
-      dsh = NULL;
-    }
-  ret = GNUNET_malloc (sizeof (struct GNUNET_FS_PublishContext));
+  {
+    dsh = NULL;
+  }
+  ret = GNUNET_new (struct GNUNET_FS_PublishContext);
   ret->dsh = dsh;
   ret->h = h;
   ret->fi = fi;
-  ret->namespace = namespace;
-  if (namespace != NULL)
-    {
-      namespace->rc++;
-      GNUNET_assert (NULL != nid);
-      ret->nid = GNUNET_strdup (nid);
-      if (NULL != nuid)
-       ret->nuid = GNUNET_strdup (nuid);
-    }
+  if (NULL != ns)
+  {
+    ret->ns = GNUNET_new (struct GNUNET_CRYPTO_EcdsaPrivateKey);
+    *ret->ns = *ns;
+    GNUNET_assert (NULL != nid);
+    ret->nid = GNUNET_strdup (nid);
+    if (NULL != nuid)
+      ret->nuid = GNUNET_strdup (nuid);
+  }
+  ret->options = options;
   /* signal start */
-  GNUNET_FS_file_information_inspect (ret->fi,
-                                     &fip_signal_start,
-                                     ret);
+  GNUNET_FS_file_information_inspect (ret->fi, &fip_signal_start, ret);
   ret->fi_pos = ret->fi;
   ret->top = GNUNET_FS_make_top (h, &GNUNET_FS_publish_signal_suspend_, ret);
   GNUNET_FS_publish_sync_ (ret);
   if (NULL != ret->dsh)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-                 _("Reserving space for %u entries and %llu bytes for publication\n"),
-                 (unsigned int) ret->reserve_entries,
-                 (unsigned long long) ret->reserve_space);
-      ret->qre = GNUNET_DATASTORE_reserve (ret->dsh,
-                                          ret->reserve_space,
-                                          ret->reserve_entries,
-                                          UINT_MAX,
-                                          UINT_MAX,
-                                          GNUNET_TIME_UNIT_FOREVER_REL,
-                                          &finish_reserve,
-                                          ret);
-    }
+  {
+    GNUNET_assert (NULL == ret->qre);
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                _("Reserving space for %u entries and %llu bytes for publication\n"),
+                (unsigned int) ret->reserve_entries,
+                (unsigned long long) ret->reserve_space);
+    ret->qre =
+        GNUNET_DATASTORE_reserve (ret->dsh, ret->reserve_space,
+                                  ret->reserve_entries,
+                                  &finish_reserve,
+                                  ret);
+  }
   else
-    {
-      ret->upload_task 
-       = GNUNET_SCHEDULER_add_with_priority (h->sched,
-                                             GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
-                                             &GNUNET_FS_publish_main_,
-                                             ret);
-    }
+  {
+    GNUNET_assert (NULL == ret->upload_task);
+    ret->upload_task =
+        GNUNET_SCHEDULER_add_with_priority
+        (GNUNET_SCHEDULER_PRIORITY_BACKGROUND, &GNUNET_FS_publish_main_, ret);
+  }
   return ret;
 }
 
@@ -1314,399 +1488,114 @@ GNUNET_FS_publish_start (struct GNUNET_FS_Handle *h,
  * Signal the FS's progress function that we are stopping
  * an upload.
  *
- * @param cls closure (of type "struct GNUNET_FS_PublishContext*")
+ * @param cls closure (of type `struct GNUNET_FS_PublishContext *`)
  * @param fi the entry in the publish-structure
  * @param length length of the file or directory
  * @param meta metadata for the file or directory (can be modified)
  * @param uri pointer to the keywords that will be used for this entry (can be modified)
- * @param anonymity pointer to selected anonymity level (can be modified)
- * @param priority pointer to selected priority (can be modified)
+ * @param bo block options (can be modified)
  * @param do_index should we index?
- * @param expirationTime pointer to selected expiration time (can be modified)
  * @param client_info pointer to client context set upon creation (can be modified)
- * @return GNUNET_OK to continue (always)
+ * @return #GNUNET_OK to continue (always)
  */
 static int
-fip_signal_stop(void *cls,
-               struct GNUNET_FS_FileInformation *fi,
-               uint64_t length,
-               struct GNUNET_CONTAINER_MetaData *meta,
-               struct GNUNET_FS_Uri **uri,
-               uint32_t *anonymity,
-               uint32_t *priority,
-               int *do_index,
-               struct GNUNET_TIME_Absolute *expirationTime,
-               void **client_info)
+fip_signal_stop (void *cls,
+                 struct GNUNET_FS_FileInformation *fi,
+                 uint64_t length,
+                 struct GNUNET_CONTAINER_MetaData *meta,
+                 struct GNUNET_FS_Uri **uri,
+                 struct GNUNET_FS_BlockOptions *bo,
+                 int *do_index, void **client_info)
 {
-  struct GNUNET_FS_PublishContext*sc = cls;
+  struct GNUNET_FS_PublishContext *pc = cls;
   struct GNUNET_FS_ProgressInfo pi;
   uint64_t off;
 
-  if (fi->serialization != NULL) 
-    {
-      GNUNET_FS_remove_sync_file_ (sc->h,
-                                  GNUNET_FS_SYNC_PATH_FILE_INFO,
-                                  fi->serialization);
-      GNUNET_free (fi->serialization);
-      fi->serialization = NULL;
-    }
+  if (GNUNET_YES == pc->skip_next_fi_callback)
+  {
+    pc->skip_next_fi_callback = GNUNET_NO;
+    return GNUNET_OK;
+  }
+  if (GNUNET_YES == GNUNET_FS_meta_data_test_for_directory (meta))
+  {
+    /* process entries in directory first */
+    pc->skip_next_fi_callback = GNUNET_YES;
+    GNUNET_FS_file_information_inspect (fi, &fip_signal_stop, pc);
+  }
+  if (NULL != fi->serialization)
+  {
+    GNUNET_FS_remove_sync_file_ (pc->h, GNUNET_FS_SYNC_PATH_FILE_INFO,
+                                 fi->serialization);
+    GNUNET_free (fi->serialization);
+    fi->serialization = NULL;
+  }
   off = (fi->chk_uri == NULL) ? 0 : length;
   pi.status = GNUNET_FS_STATUS_PUBLISH_STOPPED;
-  GNUNET_break (NULL == GNUNET_FS_publish_make_status_ (&pi, sc, fi, off));
+  GNUNET_break (NULL == GNUNET_FS_publish_make_status_ (&pi, pc, fi, off));
   *client_info = NULL;
   return GNUNET_OK;
 }
 
 
 /**
- * Stop an upload.  Will abort incomplete uploads (but 
+ * Stop an upload.  Will abort incomplete uploads (but
  * not remove blocks that have already been publishd) or
  * simply clean up the state for completed uploads.
  * Must NOT be called from within the event callback!
  *
  * @param pc context for the upload to stop
  */
-void 
+void
 GNUNET_FS_publish_stop (struct GNUNET_FS_PublishContext *pc)
 {
+  struct GNUNET_FS_ProgressInfo pi;
+  uint64_t off;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Publish stop called\n");
   GNUNET_FS_end_top (pc->h, pc->top);
+  if (NULL != pc->ksk_pc)
+  {
+    GNUNET_FS_publish_ksk_cancel (pc->ksk_pc);
+    pc->ksk_pc = NULL;
+  }
+  if (NULL != pc->sks_pc)
+  {
+    GNUNET_FS_publish_sks_cancel (pc->sks_pc);
+    pc->sks_pc = NULL;
+  }
+  if (NULL != pc->upload_task)
+  {
+    GNUNET_SCHEDULER_cancel (pc->upload_task);
+    pc->upload_task = NULL;
+  }
+  pc->skip_next_fi_callback = GNUNET_YES;
+  GNUNET_FS_file_information_inspect (pc->fi, &fip_signal_stop, pc);
+
+  if (NULL != pc->fi->serialization)
+  {
+    GNUNET_FS_remove_sync_file_ (pc->h, GNUNET_FS_SYNC_PATH_FILE_INFO,
+                                 pc->fi->serialization);
+    GNUNET_free (pc->fi->serialization);
+    pc->fi->serialization = NULL;
+  }
+  off = (NULL == pc->fi->chk_uri) ? 0 : GNUNET_ntohll (pc->fi->chk_uri->data.chk.file_length);
+
+  if (NULL != pc->serialization)
+  {
+    GNUNET_FS_remove_sync_file_ (pc->h, GNUNET_FS_SYNC_PATH_MASTER_PUBLISH,
+                                 pc->serialization);
+    GNUNET_free (pc->serialization);
+    pc->serialization = NULL;
+  }
   if (NULL != pc->qre)
-    {
-      GNUNET_DATASTORE_cancel (pc->qre);
-      pc->qre = NULL;
-    }
-  if (NULL != pc->dsh)
-    {
-      GNUNET_DATASTORE_disconnect (pc->dsh, GNUNET_NO);
-      pc->dsh = NULL;
-    }
-  if (GNUNET_SCHEDULER_NO_TASK != pc->upload_task)
-    {
-      GNUNET_SCHEDULER_cancel (pc->h->sched, pc->upload_task);
-      pc->upload_task = GNUNET_SCHEDULER_NO_TASK;
-    }
-  if (pc->serialization != NULL) 
-    {
-      GNUNET_FS_remove_sync_file_ (pc->h, GNUNET_FS_SYNC_PATH_MASTER_PUBLISH, pc->serialization);
-      GNUNET_free (pc->serialization);
-      pc->serialization = NULL;
-    }
-  GNUNET_FS_file_information_inspect (pc->fi,
-                                     &fip_signal_stop,
-                                     pc);
-  if (GNUNET_YES == pc->in_network_wait)
-    {
-      pc->in_network_wait = GNUNET_SYSERR;
-      return;
-    }
-  publish_cleanup (pc, NULL);
-}
-
-
-/**
- * Context for the KSK publication.
- */
-struct PublishKskContext
-{
-
-  /**
-   * Keywords to use.
-   */
-  struct GNUNET_FS_Uri *ksk_uri;
-
-  /**
-   * Global FS context.
-   */
-  struct GNUNET_FS_Handle *h;
-
-  /**
-   * The master block that we are sending
-   * (in plaintext), has "mdsize+slen" more
-   * bytes than the struct would suggest.
-   */
-  struct KBlock *kb;
-
-  /**
-   * Buffer of the same size as "kb" for
-   * the encrypted version.
-   */ 
-  struct KBlock *cpy;
-
-  /**
-   * Handle to the datastore, NULL if we are just
-   * simulating.
-   */
-  struct GNUNET_DATASTORE_Handle *dsh;
-
-  /**
-   * Function to call once we're done.
-   */
-  GNUNET_FS_PublishContinuation cont;
-
-  /**
-   * Closure for cont.
-   */ 
-  void *cont_cls;
-
-  /**
-   * When should the KBlocks expire?
-   */
-  struct GNUNET_TIME_Absolute expirationTime;
-
-  /**
-   * Size of the serialized metadata.
-   */
-  ssize_t mdsize;
-
-  /**
-   * Size of the (CHK) URI as a string.
-   */
-  size_t slen;
-
-  /**
-   * Keyword that we are currently processing.
-   */
-  unsigned int i;
-
-  /**
-   * Anonymity level for the KBlocks.
-   */
-  uint32_t anonymity;
-
-  /**
-   * Priority for the KBlocks.
-   */
-  uint32_t priority;
-};
-
-
-/**
- * Continuation of "GNUNET_FS_publish_ksk" that performs
- * the actual publishing operation (iterating over all
- * of the keywords).
- *
- * @param cls closure of type "struct PublishKskContext*"
- * @param tc unused
- */
-static void
-publish_ksk_cont (void *cls,
-                 const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-
-/**
- * Function called by the datastore API with
- * the result from the PUT request.
- *
- * @param cls closure of type "struct PublishKskContext*"
- * @param success GNUNET_OK on success
- * @param msg error message (or NULL)
- */
-static void
-kb_put_cont (void *cls,
-            int success,
-            const char *msg)
-{
-  struct PublishKskContext *pkc = cls;
-
-  if (GNUNET_OK != success)
-    {
-      if (NULL != pkc->dsh)
-       {
-         GNUNET_DATASTORE_disconnect (pkc->dsh, GNUNET_NO);
-         pkc->dsh = NULL;
-       }
-      GNUNET_free (pkc->cpy);
-      GNUNET_free (pkc->kb);
-      pkc->cont (pkc->cont_cls,
-                NULL,
-                msg);
-      GNUNET_FS_uri_destroy (pkc->ksk_uri);
-      GNUNET_free (pkc);
-      return;
-    }
-  GNUNET_SCHEDULER_add_continuation (pkc->h->sched,
-                                    &publish_ksk_cont,
-                                    pkc,
-                                    GNUNET_SCHEDULER_REASON_PREREQ_DONE);
-}
-
-
-/**
- * Continuation of "GNUNET_FS_publish_ksk" that performs the actual
- * publishing operation (iterating over all of the keywords).
- *
- * @param cls closure of type "struct PublishKskContext*"
- * @param tc unused
- */
-static void
-publish_ksk_cont (void *cls,
-                 const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
-  struct PublishKskContext *pkc = cls;
-  const char *keyword;
-  GNUNET_HashCode key;
-  GNUNET_HashCode query;
-  struct GNUNET_CRYPTO_AesSessionKey skey;
-  struct GNUNET_CRYPTO_AesInitializationVector iv;
-  struct GNUNET_CRYPTO_RsaPrivateKey *pk;
-
-
-  if ( (pkc->i == pkc->ksk_uri->data.ksk.keywordCount) ||
-       (NULL == pkc->dsh) )
-    {
-      if (NULL != pkc->dsh)
-       {
-         GNUNET_DATASTORE_disconnect (pkc->dsh, GNUNET_NO);
-         pkc->dsh = NULL;
-       }
-      GNUNET_free (pkc->cpy);
-      GNUNET_free (pkc->kb);
-      pkc->cont (pkc->cont_cls,
-                pkc->ksk_uri,
-                NULL);
-      GNUNET_FS_uri_destroy (pkc->ksk_uri);
-      GNUNET_free (pkc);
-      return;
-    }
-  keyword = pkc->ksk_uri->data.ksk.keywords[pkc->i++];
-  /* first character of keyword indicates if it is
-     mandatory or not -- ignore for hashing */
-  GNUNET_CRYPTO_hash (&keyword[1], strlen (&keyword[1]), &key);
-  GNUNET_CRYPTO_hash_to_aes_key (&key, &skey, &iv);
-  GNUNET_CRYPTO_aes_encrypt (&pkc->kb[1],
-                            pkc->slen + pkc->mdsize,
-                            &skey,
-                            &iv,
-                            &pkc->cpy[1]);
-  pk = GNUNET_CRYPTO_rsa_key_create_from_hash (&key);
-  GNUNET_assert (NULL != pk);
-  GNUNET_CRYPTO_rsa_key_get_public (pk, &pkc->cpy->keyspace);
-  GNUNET_CRYPTO_hash (&pkc->cpy->keyspace,
-                     sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
-                     &query);
-  GNUNET_assert (GNUNET_OK == 
-                GNUNET_CRYPTO_rsa_sign (pk,
-                                        &pkc->cpy->purpose,
-                                        &pkc->cpy->signature));
-  GNUNET_CRYPTO_rsa_key_free (pk);
-  GNUNET_DATASTORE_put (pkc->dsh,
-                       0,
-                       &query,
-                       pkc->mdsize + 
-                       sizeof (struct KBlock) + 
-                       pkc->slen,
-                       pkc->cpy,
-                       GNUNET_BLOCK_TYPE_FS_KBLOCK, 
-                       pkc->priority,
-                       pkc->anonymity,
-                       pkc->expirationTime,
-                       -2, 1,
-                       GNUNET_CONSTANTS_SERVICE_TIMEOUT,
-                       &kb_put_cont,
-                       pkc);
-}
-
-
-/**
- * Publish a CHK under various keywords on GNUnet.
- *
- * @param h handle to the file sharing subsystem
- * @param ksk_uri keywords to use
- * @param meta metadata to use
- * @param uri URI to refer to in the KBlock
- * @param expirationTime when the KBlock expires
- * @param anonymity anonymity level for the KBlock
- * @param priority priority for the KBlock
- * @param options publication options
- * @param cont continuation
- * @param cont_cls closure for cont
- */
-void
-GNUNET_FS_publish_ksk (struct GNUNET_FS_Handle *h,
-                      const struct GNUNET_FS_Uri *ksk_uri,
-                      const struct GNUNET_CONTAINER_MetaData *meta,
-                      const struct GNUNET_FS_Uri *uri,
-                      struct GNUNET_TIME_Absolute expirationTime,
-                      uint32_t anonymity,
-                      uint32_t priority,
-                      enum GNUNET_FS_PublishOptions options,
-                      GNUNET_FS_PublishContinuation cont,
-                      void *cont_cls)
-{
-  struct PublishKskContext *pkc;
-  char *uris;
-  size_t size;
-  char *kbe;
-  char *sptr;
-
-  GNUNET_assert (NULL != uri);
-  pkc = GNUNET_malloc (sizeof (struct PublishKskContext));
-  pkc->h = h;
-  pkc->expirationTime = expirationTime;
-  pkc->anonymity = anonymity;
-  pkc->priority = priority;
-  pkc->cont = cont;
-  pkc->cont_cls = cont_cls;
-  if (0 == (options & GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY))
-    {
-      pkc->dsh = GNUNET_DATASTORE_connect (h->cfg,
-                                          h->sched);
-      if (pkc->dsh == NULL)
-       {
-         cont (cont_cls, NULL, _("Could not connect to datastore."));
-         GNUNET_free (pkc);
-         return;
-       }
-    }
-  if (meta == NULL)
-    pkc->mdsize = 0;
-  else
-    pkc->mdsize = GNUNET_CONTAINER_meta_data_get_serialized_size (meta);
-  GNUNET_assert (pkc->mdsize >= 0);
-  uris = GNUNET_FS_uri_to_string (uri);
-  pkc->slen = strlen (uris) + 1;
-  size = pkc->mdsize + sizeof (struct KBlock) + pkc->slen;
-  if (size > MAX_KBLOCK_SIZE)
-    {
-      size = MAX_KBLOCK_SIZE;
-      pkc->mdsize = size - sizeof (struct KBlock) - pkc->slen;
-    }
-  pkc->kb = GNUNET_malloc (size);
-  kbe = (char *) &pkc->kb[1];
-  memcpy (kbe, uris, pkc->slen);
-  GNUNET_free (uris);
-  sptr = &kbe[pkc->slen];
-  if (meta != NULL)
-    pkc->mdsize = GNUNET_CONTAINER_meta_data_serialize (meta,
-                                                       &sptr,
-                                                       pkc->mdsize,
-                                                       GNUNET_CONTAINER_META_DATA_SERIALIZE_PART);
-  if (pkc->mdsize == -1)
-    {
-      GNUNET_break (0);
-      GNUNET_free (pkc->kb);
-      if (pkc->dsh != NULL)
-       {
-         GNUNET_DATASTORE_disconnect (pkc->dsh, GNUNET_NO);
-         pkc->dsh = NULL;
-       }
-      cont (cont_cls, NULL, _("Internal error."));
-      GNUNET_free (pkc);
-      return;
-    }
-  size = sizeof (struct KBlock) + pkc->slen + pkc->mdsize;
-
-  pkc->cpy = GNUNET_malloc (size);
-  pkc->cpy->purpose.size = htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) + 
-                                 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
-                                 pkc->mdsize + 
-                                 pkc->slen);
-  pkc->cpy->purpose.purpose = htonl(GNUNET_SIGNATURE_PURPOSE_FS_KBLOCK);
-  pkc->ksk_uri = GNUNET_FS_uri_dup (ksk_uri);
-  GNUNET_SCHEDULER_add_continuation (h->sched,
-                                    &publish_ksk_cont,
-                                    pkc,
-                                    GNUNET_SCHEDULER_REASON_PREREQ_DONE);
+  {
+    GNUNET_DATASTORE_cancel (pc->qre);
+    pc->qre = NULL;
+  }
+  pi.status = GNUNET_FS_STATUS_PUBLISH_STOPPED;
+  GNUNET_break (NULL == GNUNET_FS_publish_make_status_ (&pi, pc, pc->fi, off));
+  publish_cleanup (pc);
 }