[SSSD] [PATCH] MEMBEROF: Implement the modify operation for ghost users

Jakub Hrozek jhrozek at redhat.com
Tue Nov 27 16:57:28 UTC 2012


The first three patches are just refactoring. The last patch implements
the real modify operation along with a number of unit tests.
-------------- next part --------------
>From 71902d3eab67a14ba200908b7c708d3f661e4ed8 Mon Sep 17 00:00:00 2001
From: Jakub Hrozek <jhrozek at redhat.com>
Date: Mon, 26 Nov 2012 13:18:59 +0100
Subject: [PATCH 1/4] MEMBEROF: split processing the member modify into a
 separate function

This will allow to process ghost users in a similar fashion
---
 src/ldb_modules/memberof.c | 117 +++++++++++++++++++++++++++------------------
 1 file changed, 70 insertions(+), 47 deletions(-)

diff --git a/src/ldb_modules/memberof.c b/src/ldb_modules/memberof.c
index 3455b8805c85e44caab3e5833c0dddcc62bcc598..65b1fa6b9081aef2b518c741102ce59483c4209e 100644
--- a/src/ldb_modules/memberof.c
+++ b/src/ldb_modules/memberof.c
@@ -149,7 +149,8 @@ struct mbof_mod_ctx {
     const struct ldb_message_element *membel;
     struct ldb_message *entry;
 
-    struct mbof_dn_array *to_add;
+    struct mbof_dn_array *mb_add;
+    struct mbof_dn_array *mb_remove;
 
     struct ldb_message *msg;
     bool terminate;
@@ -2262,7 +2263,7 @@ static int mbof_del_progeny(struct mbof_del_operation *delop)
     /* see if there are follow functions to run */
     if (del_ctx->follow_mod) {
         return mbof_mod_add(del_ctx->follow_mod,
-                            del_ctx->follow_mod->to_add);
+                            del_ctx->follow_mod->mb_add);
     }
 
     /* ok, no more ops, this means our job is done */
@@ -2533,7 +2534,7 @@ static int mbof_del_muop_callback(struct ldb_request *req,
         /* see if there are follow functions to run */
         else if (del_ctx->follow_mod) {
             return mbof_mod_add(del_ctx->follow_mod,
-                                del_ctx->follow_mod->to_add);
+                                del_ctx->follow_mod->mb_add);
         }
         else {
             return ldb_module_done(ctx->req,
@@ -2645,7 +2646,7 @@ static int mbof_del_ghop_callback(struct ldb_request *req,
         /* see if there are follow functions to run */
         else if (del_ctx->follow_mod) {
             return mbof_mod_add(del_ctx->follow_mod,
-                                del_ctx->follow_mod->to_add);
+                                del_ctx->follow_mod->mb_add);
         }
         else {
             return ldb_module_done(ctx->req,
@@ -2693,6 +2694,11 @@ static int mbof_orig_mod(struct mbof_mod_ctx *mod_ctx);
 static int mbof_orig_mod_callback(struct ldb_request *req,
                                   struct ldb_reply *ares);
 static int mbof_mod_process(struct mbof_mod_ctx *mod_ctx, bool *done);
+static int mbof_mod_process_membel(TALLOC_CTX *mem_ctx, struct ldb_context *ldb,
+                                   struct ldb_message *entry,
+                                   const struct ldb_message_element *membel,
+                                   struct mbof_dn_array **_added,
+                                   struct mbof_dn_array **_removed);
 static int mbof_mod_delete(struct mbof_mod_ctx *mod_ctx,
                            struct mbof_dn_array *del);
 static int mbof_fill_dn_array(TALLOC_CTX *memctx,
@@ -2916,63 +2922,96 @@ static int mbof_orig_mod_callback(struct ldb_request *req,
 
 static int mbof_mod_process(struct mbof_mod_ctx *mod_ctx, bool *done)
 {
-    const struct ldb_message_element *el;
     struct ldb_context *ldb;
     struct mbof_ctx *ctx;
-    struct mbof_dn_array *removed;
-    struct mbof_dn_array *added;
-    int i, j, ret;
+    int ret;
 
     ctx = mod_ctx->ctx;
     ldb = ldb_module_get_ctx(ctx->module);
 
-    switch (mod_ctx->membel->flags) {
+    ret = mbof_mod_process_membel(mod_ctx, ldb, mod_ctx->entry, mod_ctx->membel,
+                                  &mod_ctx->mb_add, &mod_ctx->mb_remove);
+    if (ret != LDB_SUCCESS) {
+        return ret;
+    }
+
+    /* Process the operations */
+    if (mod_ctx->mb_remove && mod_ctx->mb_remove->num) {
+        return mbof_mod_delete(mod_ctx, mod_ctx->mb_remove);
+    }
+
+    if (mod_ctx->mb_add && mod_ctx->mb_add->num) {
+        return mbof_mod_add(mod_ctx, mod_ctx->mb_add);
+    }
+
+    /* the replacement function resulted in a null op,
+     * nothing to do, return happily */
+    *done = true;
+    return LDB_SUCCESS;
+}
+
+static int mbof_mod_process_membel(TALLOC_CTX *mem_ctx,
+                                   struct ldb_context *ldb,
+                                   struct ldb_message *entry,
+                                   const struct ldb_message_element *membel,
+                                   struct mbof_dn_array **_added,
+                                   struct mbof_dn_array **_removed)
+{
+    const struct ldb_message_element *el;
+    struct mbof_dn_array *removed = NULL;
+    struct mbof_dn_array *added = NULL;
+    int i, j, ret;
+
+    if (!membel) {
+        /* Nothing to do.. */
+        return LDB_SUCCESS;
+    }
+
+    switch (membel->flags) {
     case LDB_FLAG_MOD_ADD:
 
-        ret = mbof_fill_dn_array(mod_ctx, ldb, mod_ctx->membel, &added);
+        ret = mbof_fill_dn_array(mem_ctx, ldb, membel, &added);
         if (ret != LDB_SUCCESS) {
             return ret;
         }
-
-        return mbof_mod_add(mod_ctx, added);
+        break;
 
     case LDB_FLAG_MOD_DELETE:
 
-        if (mod_ctx->membel->num_values == 0) {
-            el = ldb_msg_find_element(mod_ctx->entry, DB_MEMBER);
+        if (membel->num_values == 0) {
+            el = ldb_msg_find_element(entry, DB_MEMBER);
         } else {
-            el = mod_ctx->membel;
+            el = membel;
         }
 
         if (!el) {
             /* nothing to do really */
-            *done = true;
-            return LDB_SUCCESS;
+            break;
         }
 
-        ret = mbof_fill_dn_array(mod_ctx, ldb, el, &removed);
+        ret = mbof_fill_dn_array(mem_ctx, ldb, el, &removed);
         if (ret != LDB_SUCCESS) {
             return ret;
         }
-
-        return mbof_mod_delete(mod_ctx, removed);
+        break;
 
     case LDB_FLAG_MOD_REPLACE:
 
         removed = NULL;
-        el = ldb_msg_find_element(mod_ctx->entry, DB_MEMBER);
+        el = ldb_msg_find_element(entry, DB_MEMBER);
         if (el) {
-            ret = mbof_fill_dn_array(mod_ctx, ldb, el, &removed);
+            ret = mbof_fill_dn_array(mem_ctx, ldb, el, &removed);
             if (ret != LDB_SUCCESS) {
                 return ret;
             }
         }
 
         added = NULL;
-        el = mod_ctx->membel;
+        el = membel;
         if (el) {
-            ret = mbof_fill_dn_array(mod_ctx, ldb, el, &added);
+            ret = mbof_fill_dn_array(mem_ctx, ldb, el, &added);
             if (ret != LDB_SUCCESS) {
+                talloc_free(removed);
                 return ret;
             }
         }
@@ -2999,31 +3038,15 @@ static int mbof_mod_process(struct mbof_mod_ctx *mod_ctx, bool *done)
                 }
             }
         }
+        break;
 
-        /* if we need to add something put it away so that it
-         * can be done after all delete operations are over */
-        if (added && added->num) {
-            mod_ctx->to_add = added;
-        }
-
-        /* if we have something to remove do it first */
-        if (removed && removed->num) {
-            return mbof_mod_delete(mod_ctx, removed);
-        }
-
-        /* if there is nothing to remove and we have stuff to add
-         * do it right away */
-        if (mod_ctx->to_add) {
-            return mbof_mod_add(mod_ctx, added);
-        }
-
-        /* the replacement function resulted in a null op,
-         * nothing to do, return happily */
-        *done = true;
-        return LDB_SUCCESS;
+    default:
+        return LDB_ERR_OPERATIONS_ERROR;
     }
 
-    return LDB_ERR_OPERATIONS_ERROR;
+    *_added = added;
+    *_removed = removed;
+    return LDB_SUCCESS;
 }
 
 static int mbof_mod_add(struct mbof_mod_ctx *mod_ctx,
@@ -3111,7 +3134,7 @@ static int mbof_mod_delete(struct mbof_mod_ctx *mod_ctx,
     }
 
     /* add followup function if we also have stuff to add */
-    if (mod_ctx->to_add) {
+    if (mod_ctx->mb_add) {
         del_ctx->follow_mod = mod_ctx;
     }
 
-- 
1.8.0

-------------- next part --------------
>From a6a1f85fd581ddf31fc3379048e227327634602f Mon Sep 17 00:00:00 2001
From: Jakub Hrozek <jhrozek at redhat.com>
Date: Mon, 26 Nov 2012 18:22:12 +0100
Subject: [PATCH 2/4] MEMBEROF: Split the del ghost attribute op into a
 reusable function

This new function is going to be reused by the modify operation
---
 src/ldb_modules/memberof.c | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/src/ldb_modules/memberof.c b/src/ldb_modules/memberof.c
index 65b1fa6b9081aef2b518c741102ce59483c4209e..211b8ac09e13a8aaece0b306bf00c8d2fc666233 100644
--- a/src/ldb_modules/memberof.c
+++ b/src/ldb_modules/memberof.c
@@ -2388,11 +2388,12 @@ static int mbof_del_fill_muop(struct mbof_del_ctx *del_ctx,
     return LDB_SUCCESS;
 }
 
-static int mbof_del_fill_ghop(struct mbof_del_ctx *del_ctx,
-                              struct ldb_message *entry)
+static int mbof_del_fill_ghop_ex(struct mbof_del_ctx *del_ctx,
+                                 struct ldb_message *entry,
+                                 struct ldb_val *ghvals,
+                                 unsigned int num_gh_vals)
 {
     struct ldb_message_element *mbof;
-    struct ldb_message_element *ghel;
     struct ldb_dn *valdn;
     int ret;
     int i, j;
@@ -2403,12 +2404,6 @@ static int mbof_del_fill_ghop(struct mbof_del_ctx *del_ctx,
         return LDB_SUCCESS;
     }
 
-    ghel = ldb_msg_find_element(entry, DB_GHOST);
-    if (ghel == NULL || ghel->num_values == 0) {
-        /* No ghel attribute, just return success */
-        return LDB_SUCCESS;
-    }
-
     ret = entry_is_group_object(entry);
     switch (ret) {
     case LDB_SUCCESS:
@@ -2427,7 +2422,7 @@ static int mbof_del_fill_ghop(struct mbof_del_ctx *del_ctx,
     ldb_debug(ldb_module_get_ctx(del_ctx->ctx->module),
               LDB_DEBUG_TRACE,
               "will delete %d ghost users from %d parents\n",
-              ghel->num_values, mbof->num_values);
+              num_gh_vals, mbof->num_values);
 
     for (i = 0; i < mbof->num_values; i++) {
         valdn = ldb_dn_from_ldb_val(del_ctx->ghops,
@@ -2445,12 +2440,12 @@ static int mbof_del_fill_ghop(struct mbof_del_ctx *del_ctx,
                   "processing ghosts in parent [%s]\n",
                   (const char *) mbof->values[i].data);
 
-        for (j = 0; j < ghel->num_values; j++) {
+        for (j = 0; j < num_gh_vals; j++) {
             ret = mbof_append_muop(del_ctx, &del_ctx->ghops,
                                    &del_ctx->num_ghops,
                                    LDB_FLAG_MOD_DELETE,
                                    valdn,
-                                   (const char *) ghel->values[j].data,
+                                   (const char *) ghvals[j].data,
                                    DB_GHOST);
             if (ret != LDB_SUCCESS) {
                 return ret;
@@ -2461,6 +2456,21 @@ static int mbof_del_fill_ghop(struct mbof_del_ctx *del_ctx,
     return LDB_SUCCESS;
 }
 
+static int mbof_del_fill_ghop(struct mbof_del_ctx *del_ctx,
+                              struct ldb_message *entry)
+{
+    struct ldb_message_element *ghel;
+
+    ghel = ldb_msg_find_element(entry, DB_GHOST);
+    if (ghel == NULL || ghel->num_values == 0) {
+        /* No ghel attribute, just return success */
+        return LDB_SUCCESS;
+    }
+
+    return mbof_del_fill_ghop_ex(del_ctx, entry,
+                                 ghel->values, ghel->num_values);
+}
+
 /* del memberuid attributes from parent groups */
 static int mbof_del_muop(struct mbof_del_ctx *del_ctx)
 {
-- 
1.8.0

-------------- next part --------------
>From 11f7c828d4d9dd5ba9673d6832d614a81c12f51c Mon Sep 17 00:00:00 2001
From: Jakub Hrozek <jhrozek at redhat.com>
Date: Tue, 27 Nov 2012 16:06:42 +0100
Subject: [PATCH 3/4] MEMBEROF: Split the add ghost operation into a separate
 function

This new function will be reused by the modify operation later
---
 src/ldb_modules/memberof.c | 90 +++++++++++++++++++++++++++++++++++++---------
 1 file changed, 73 insertions(+), 17 deletions(-)

diff --git a/src/ldb_modules/memberof.c b/src/ldb_modules/memberof.c
index 211b8ac09e13a8aaece0b306bf00c8d2fc666233..2504da526d6e5ba76159de69e43db37dced88526 100644
--- a/src/ldb_modules/memberof.c
+++ b/src/ldb_modules/memberof.c
@@ -353,6 +353,57 @@ static int mbof_append_addop(struct mbof_add_ctx *add_ctx,
     return LDB_SUCCESS;
 }
 
+static int mbof_add_fill_ghop_ex(struct mbof_add_ctx *add_ctx,
+                                 struct ldb_message *entry,
+                                 struct mbof_dn_array *parents,
+                                 struct ldb_val *ghvals,
+                                 unsigned int num_gh_vals)
+{
+    int ret;
+    int i, j;
+
+    if (!parents || parents->num == 0) {
+        /* no parents attributes ... */
+        return LDB_SUCCESS;
+    }
+
+    ret = entry_is_group_object(entry);
+    switch (ret) {
+    case LDB_SUCCESS:
+        /* it's a group object, continue */
+        break;
+
+    case LDB_ERR_NO_SUCH_ATTRIBUTE:
+        /* it is not a group object, just return */
+        return LDB_SUCCESS;
+
+    default:
+        /* an error occured, return */
+        return ret;
+    }
+
+    ldb_debug(ldb_module_get_ctx(add_ctx->ctx->module),
+              LDB_DEBUG_TRACE,
+              "will add %d ghost users to %d parents\n",
+              num_gh_vals, parents->num);
+
+    for (i = 0; i < parents->num; i++) {
+        for (j = 0; j < num_gh_vals; j++) {
+            ret = mbof_append_muop(add_ctx, &add_ctx->muops,
+                                   &add_ctx->num_muops,
+                                   LDB_FLAG_MOD_ADD,
+                                   parents->dns[i],
+                                   (const char *) ghvals[j].data,
+                                   DB_GHOST);
+            if (ret != LDB_SUCCESS) {
+                return ret;
+            }
+        }
+    }
+
+    return LDB_SUCCESS;
+}
+
 static int memberof_recompute_task(struct ldb_module *module,
                                    struct ldb_request *req);
 
@@ -362,6 +413,9 @@ static int mbof_next_add(struct mbof_add_operation *addop);
 static int mbof_next_add_callback(struct ldb_request *req,
                                   struct ldb_reply *ares);
 static int mbof_add_operation(struct mbof_add_operation *addop);
+static int mbof_add_fill_ghop(struct mbof_add_ctx *add_ctx,
+                              struct ldb_message *entry,
+                              struct mbof_dn_array *parents);
 static int mbof_add_missing(struct mbof_add_ctx *add_ctx, struct ldb_dn *dn);
 static int mbof_add_cleanup(struct mbof_add_ctx *add_ctx);
 static int mbof_add_cleanup_callback(struct ldb_request *req,
@@ -828,23 +882,9 @@ static int mbof_add_operation(struct mbof_add_operation *addop)
         return ret;
     }
 
-    el = ldb_msg_find_element(addop->entry, DB_GHOST);
-    if (el) {
-        for (i = 0; i < el->num_values; i++) {
-            /* add ghost to all group's parents */
-            for (j = 0; j < parents->num; j++) {
-                ret = mbof_append_muop(add_ctx, &add_ctx->muops,
-                                       &add_ctx->num_muops,
-                                       LDB_FLAG_MOD_ADD,
-                                       parents->dns[j],
-                                       (char *)el->values[i].data,
-                                       DB_GHOST);
-                if (ret != LDB_SUCCESS) {
-                    return ret;
-                }
-            }
-
-        }
+    ret = mbof_add_fill_ghop(add_ctx, addop->entry, parents);
+    if (ret != LDB_SUCCESS) {
+        return ret;
     }
 
     /* we are done with the entry now */
@@ -889,6 +929,22 @@ static int mbof_add_operation(struct mbof_add_operation *addop)
     return ldb_next_request(ctx->module, mod_req);
 }
 
+static int mbof_add_fill_ghop(struct mbof_add_ctx *add_ctx,
+                              struct ldb_message *entry,
+                              struct mbof_dn_array *parents)
+{
+    struct ldb_message_element *ghel;
+
+    ghel = ldb_msg_find_element(entry, DB_GHOST);
+    if (ghel == NULL || ghel->num_values == 0) {
+        /* No ghel attribute, just return success */
+        return LDB_SUCCESS;
+    }
+
+    return mbof_add_fill_ghop_ex(add_ctx, entry, parents,
+                                 ghel->values, ghel->num_values);
+}
+
 static int mbof_add_missing(struct mbof_add_ctx *add_ctx, struct ldb_dn *dn)
 {
     struct mbof_dn *mdn;
-- 
1.8.0

-------------- next part --------------
>From cf6c11388456c115c1b9263b945715f642568315 Mon Sep 17 00:00:00 2001
From: Jakub Hrozek <jhrozek at redhat.com>
Date: Tue, 27 Nov 2012 16:09:23 +0100
Subject: [PATCH 4/4] MEMBEROF: Implement the modify operation for ghost users

---
 src/ldb_modules/memberof.c | 284 ++++++++++++++++++++++----
 src/tests/sysdb-tests.c    | 486 ++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 724 insertions(+), 46 deletions(-)

diff --git a/src/ldb_modules/memberof.c b/src/ldb_modules/memberof.c
index 2504da526d6e5ba76159de69e43db37dced88526..90c31da4ac2a2746161dbb3c399d0b291962aab6 100644
--- a/src/ldb_modules/memberof.c
+++ b/src/ldb_modules/memberof.c
@@ -45,6 +45,11 @@
 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
 #endif
 
+struct mbof_val_array {
+    struct ldb_val *vals;
+    int num;
+};
+
 struct mbof_dn_array {
     struct ldb_dn **dns;
     int num;
@@ -147,11 +152,15 @@ struct mbof_mod_ctx {
     struct mbof_ctx *ctx;
 
     const struct ldb_message_element *membel;
+    const struct ldb_message_element *ghel;
     struct ldb_message *entry;
 
     struct mbof_dn_array *mb_add;
     struct mbof_dn_array *mb_remove;
 
+    struct mbof_val_array *gh_add;
+    struct mbof_val_array *gh_remove;
+
     struct ldb_message *msg;
     bool terminate;
 };
@@ -2260,7 +2269,8 @@ static int mbof_del_mod_callback(struct ldb_request *req,
 }
 
 static int mbof_mod_add(struct mbof_mod_ctx *mod_ctx,
-                        struct mbof_dn_array *ael);
+                        struct mbof_dn_array *ael,
+                        struct mbof_val_array *addgh);
 
 static int mbof_del_progeny(struct mbof_del_operation *delop)
 {
@@ -2319,7 +2329,8 @@ static int mbof_del_progeny(struct mbof_del_operation *delop)
     /* see if there are follow functions to run */
     if (del_ctx->follow_mod) {
         return mbof_mod_add(del_ctx->follow_mod,
-                            del_ctx->follow_mod->mb_add);
+                            del_ctx->follow_mod->mb_add,
+                            del_ctx->follow_mod->gh_add);
     }
 
     /* ok, no more ops, this means our job is done */
@@ -2600,7 +2611,8 @@ static int mbof_del_muop_callback(struct ldb_request *req,
         /* see if there are follow functions to run */
         else if (del_ctx->follow_mod) {
             return mbof_mod_add(del_ctx->follow_mod,
-                                del_ctx->follow_mod->mb_add);
+                                del_ctx->follow_mod->mb_add,
+                                del_ctx->follow_mod->gh_add);
         }
         else {
             return ldb_module_done(ctx->req,
@@ -2712,7 +2724,8 @@ static int mbof_del_ghop_callback(struct ldb_request *req,
         /* see if there are follow functions to run */
         else if (del_ctx->follow_mod) {
             return mbof_mod_add(del_ctx->follow_mod,
-                                del_ctx->follow_mod->mb_add);
+                                del_ctx->follow_mod->mb_add,
+                                del_ctx->follow_mod->gh_add);
         }
         else {
             return ldb_module_done(ctx->req,
@@ -2765,19 +2778,30 @@ static int mbof_mod_process_membel(TALLOC_CTX *mem_ctx, struct ldb_context *ldb,
                                    const struct ldb_message_element *membel,
                                    struct mbof_dn_array **_added,
                                    struct mbof_dn_array **_removed);
+static int mbof_mod_process_ghel(TALLOC_CTX *mem_ctx, struct ldb_context *ldb,
+                                 struct ldb_message *entry,
+                                 const struct ldb_message_element *membel,
+                                 struct mbof_val_array **_added,
+                                 struct mbof_val_array **_removed);
 static int mbof_mod_delete(struct mbof_mod_ctx *mod_ctx,
-                           struct mbof_dn_array *del);
+                           struct mbof_dn_array *del,
+                           struct mbof_val_array *delgh);
 static int mbof_fill_dn_array(TALLOC_CTX *memctx,
                               struct ldb_context *ldb,
                               const struct ldb_message_element *el,
                               struct mbof_dn_array **dn_array);
+static int mbof_fill_vals_array(TALLOC_CTX *memctx,
+                                struct ldb_context *ldb,
+                                const struct ldb_message_element *el,
+                                struct mbof_val_array **val_array);
 
 static int memberof_mod(struct ldb_module *module, struct ldb_request *req)
 {
     struct ldb_message_element *el;
     struct mbof_mod_ctx *mod_ctx;
     struct mbof_ctx *ctx;
-    static const char *attrs[] = {DB_MEMBER, DB_MEMBEROF, NULL};
+    static const char *attrs[] = { DB_OC, DB_GHOST,
+                                   DB_MEMBER, DB_MEMBEROF, NULL};
     struct ldb_context *ldb = ldb_module_get_ctx(module);
     struct ldb_request *search;
     int ret;
@@ -2820,15 +2844,15 @@ static int memberof_mod(struct ldb_module *module, struct ldb_request *req)
         return LDB_ERR_OPERATIONS_ERROR;
     }
 
-    /* continue with normal ops if there are no members */
-    el = ldb_msg_find_element(mod_ctx->msg, DB_MEMBER);
-    if (!el) {
+    mod_ctx->membel = ldb_msg_find_element(mod_ctx->msg, DB_MEMBER);
+    mod_ctx->ghel = ldb_msg_find_element(mod_ctx->msg, DB_GHOST);
+
+    /* continue with normal ops if there are no members and no ghosts */
+    if (mod_ctx->membel == NULL && mod_ctx->ghel == NULL) {
         mod_ctx->terminate = true;
         return mbof_orig_mod(mod_ctx);
     }
 
-    mod_ctx->membel = el;
-
     /* can't do anything,
      * must check first what's on the entry */
     ret = ldb_build_search_req(&search, ldb, mod_ctx,
@@ -3001,13 +3025,21 @@ static int mbof_mod_process(struct mbof_mod_ctx *mod_ctx, bool *done)
         return ret;
     }
 
+    ret = mbof_mod_process_ghel(mod_ctx, ldb, mod_ctx->entry, mod_ctx->ghel,
+                                &mod_ctx->gh_add, &mod_ctx->gh_remove);
+    if (ret != LDB_SUCCESS) {
+        return ret;
+    }
+
     /* Process the operations */
-    if (mod_ctx->mb_remove && mod_ctx->mb_remove->num) {
-        return mbof_mod_delete(mod_ctx, mod_ctx->mb_remove);
+    if ((mod_ctx->mb_remove && mod_ctx->mb_remove->num) ||
+        (mod_ctx->gh_remove && mod_ctx->gh_remove->num)) {
+        return mbof_mod_delete(mod_ctx, mod_ctx->mb_remove, mod_ctx->gh_remove);
     }
 
-    if (mod_ctx->mb_add && mod_ctx->mb_add->num) {
-        return mbof_mod_add(mod_ctx, mod_ctx->mb_add);
+    if ((mod_ctx->mb_add && mod_ctx->mb_add->num) ||
+        (mod_ctx->gh_add && mod_ctx->gh_add->num)) {
+        return mbof_mod_add(mod_ctx, mod_ctx->mb_add, mod_ctx->gh_add);
     }
 
     /* the replacement function resulted in a null op,
@@ -3115,8 +3147,109 @@ static int mbof_mod_process_membel(TALLOC_CTX *mem_ctx,
     return LDB_SUCCESS;
 }
 
+static int mbof_mod_process_ghel(TALLOC_CTX *mem_ctx, struct ldb_context *ldb,
+                                 struct ldb_message *entry,
+                                 const struct ldb_message_element *ghel,
+                                 struct mbof_val_array **_added,
+                                 struct mbof_val_array **_removed)
+{
+    const struct ldb_message_element *el;
+    struct mbof_val_array *removed = NULL;
+    struct mbof_val_array *added = NULL;
+    int i, j, ret;
+
+    if (!ghel) {
+        /* Nothing to do.. */
+        return LDB_SUCCESS;
+    }
+
+    el = ldb_msg_find_element(entry, DB_MEMBEROF);
+    if (!el || el->num_values == 0) {
+        /* no memberof attributes ... */
+        return LDB_SUCCESS;
+    }
+
+    switch (ghel->flags) {
+    case LDB_FLAG_MOD_ADD:
+        ret = mbof_fill_vals_array(mem_ctx, ldb, ghel, &added);
+        if (ret != LDB_SUCCESS) {
+            return ret;
+        }
+        break;
+
+    case LDB_FLAG_MOD_DELETE:
+        if (ghel->num_values == 0) {
+            el = ldb_msg_find_element(entry, DB_GHOST);
+        } else {
+            el = ghel;
+        }
+
+        if (!el) {
+            /* nothing to do really */
+            break;
+        }
+
+        ret = mbof_fill_vals_array(mem_ctx, ldb, ghel, &removed);
+        if (ret != LDB_SUCCESS) {
+            return ret;
+        }
+        break;
+
+    case LDB_FLAG_MOD_REPLACE:
+        el = ldb_msg_find_element(entry, DB_GHOST);
+        if (el) {
+            ret = mbof_fill_vals_array(mem_ctx, ldb, el, &removed);
+            if (ret != LDB_SUCCESS) {
+                return ret;
+            }
+        }
+
+        el = ghel;
+        if (el) {
+            ret = mbof_fill_vals_array(mem_ctx, ldb, el, &added);
+            if (ret != LDB_SUCCESS) {
+                talloc_free(removed);
+                return ret;
+            }
+        }
+
+        /* remove from arrays values that ended up unchanged */
+        if (removed && removed->num && added && added->num) {
+            for (i = 0; i < added->num; i++) {
+                for (j = 0; j < removed->num; j++) {
+                    if (strcmp((const char *) added->vals[i].data,
+                               (const char *) removed->vals[j].data) == 0) {
+                        break;
+                    }
+                }
+                if (j < removed->num) {
+                    /* preexisting one, not removed, nor added */
+                    for (; j+1 < removed->num; j++) {
+                        removed->vals[j] = removed->vals[j+1];
+                    }
+                    removed->num--;
+                    for (j = i; j+1 < added->num; j++) {
+                        added->vals[j] = added->vals[j+1];
+                    }
+                    added->num--;
+                    i--;
+                }
+            }
+        }
+        break;
+
+    default:
+        return LDB_ERR_OPERATIONS_ERROR;
+    }
+
+    *_added = added;
+    *_removed = removed;
+    return LDB_SUCCESS;
+}
+
 static int mbof_mod_add(struct mbof_mod_ctx *mod_ctx,
-                        struct mbof_dn_array *ael)
+                        struct mbof_dn_array *ael,
+                        struct mbof_val_array *addgh)
 {
     const struct ldb_message_element *el;
     struct mbof_dn_array *parents;
@@ -3136,14 +3269,6 @@ static int mbof_mod_add(struct mbof_mod_ctx *mod_ctx,
         return ret;
     }
 
-    parents->dns = talloc_realloc(parents, parents->dns,
-                                  struct ldb_dn *, parents->num + 1);
-    if (!parents->dns) {
-        return LDB_ERR_OPERATIONS_ERROR;
-    }
-    parents->dns[parents->num] = mod_ctx->entry->dn;
-    parents->num++;
-
     add_ctx = talloc_zero(mod_ctx, struct mbof_add_ctx);
     if (!add_ctx) {
         return LDB_ERR_OPERATIONS_ERROR;
@@ -3151,18 +3276,42 @@ static int mbof_mod_add(struct mbof_mod_ctx *mod_ctx,
     add_ctx->ctx = ctx;
     add_ctx->msg_dn = mod_ctx->msg->dn;
 
-    for (i = 0; i < ael->num; i++) {
-        ret = mbof_append_addop(add_ctx, parents, ael->dns[i]);
+    if (addgh != NULL) {
+        /* Build the memberuid add op */
+        ret =  mbof_add_fill_ghop_ex(add_ctx, mod_ctx->entry,
+                                     parents, addgh->vals, addgh->num);
         if (ret != LDB_SUCCESS) {
             return ret;
         }
     }
 
-    return mbof_next_add(add_ctx->add_list);
+    if (ael != NULL) {
+        /* Add itself to the list of the parents to also get the memberuid */
+        parents->dns = talloc_realloc(parents, parents->dns,
+                                    struct ldb_dn *, parents->num + 1);
+        if (!parents->dns) {
+            return LDB_ERR_OPERATIONS_ERROR;
+        }
+        parents->dns[parents->num] = mod_ctx->entry->dn;
+        parents->num++;
+
+        /* Build the member-add array */
+        for (i = 0; i < ael->num; i++) {
+            ret = mbof_append_addop(add_ctx, parents, ael->dns[i]);
+            if (ret != LDB_SUCCESS) {
+                return ret;
+            }
+        }
+
+        return mbof_next_add(add_ctx->add_list);
+    }
+
+    return mbof_add_muop(add_ctx);
 }
 
 static int mbof_mod_delete(struct mbof_mod_ctx *mod_ctx,
-                           struct mbof_dn_array *del)
+                           struct mbof_dn_array *del,
+                           struct mbof_val_array *delgh)
 {
     struct mbof_del_operation *first;
     struct mbof_del_ctx *del_ctx;
@@ -3187,25 +3336,38 @@ static int mbof_mod_delete(struct mbof_mod_ctx *mod_ctx,
     }
     del_ctx->first = first;
 
-    first->del_ctx = del_ctx;
-    first->entry = mod_ctx->entry;
-    first->entry_dn = mod_ctx->entry->dn;
-
-    /* prepare del sets */
-    for (i = 0; i < del->num; i++) {
-        ret = mbof_append_delop(first, del->dns[i]);
-        if (ret != LDB_SUCCESS) {
-            return ret;
-        }
-    }
-
     /* add followup function if we also have stuff to add */
-    if (mod_ctx->mb_add) {
+    if (mod_ctx->mb_add || mod_ctx->gh_add) {
         del_ctx->follow_mod = mod_ctx;
     }
 
-    /* now that sets are built, start processing */
-    return mbof_del_execute_op(first->children[0]);
+    first->del_ctx = del_ctx;
+    first->entry = mod_ctx->entry;
+    first->entry_dn = mod_ctx->entry->dn;
+
+    if (delgh != NULL) {
+        ret = mbof_del_fill_ghop_ex(del_ctx, del_ctx->first->entry,
+                                    delgh->vals, delgh->num);
+        if (ret != LDB_SUCCESS) {
+            return ret;
+        }
+    }
+
+    /* prepare del sets */
+    if (del != NULL) {
+        for (i = 0; i < del->num; i++) {
+            ret = mbof_append_delop(first, del->dns[i]);
+            if (ret != LDB_SUCCESS) {
+                return ret;
+            }
+        }
+
+        /* now that sets are built, start processing */
+        return mbof_del_execute_op(first->children[0]);
+    }
+
+    /* No member processing, just delete ghosts */
+    return mbof_del_ghop(del_ctx);
 }
 
 static int mbof_fill_dn_array(TALLOC_CTX *memctx,
@@ -3246,6 +3408,42 @@ static int mbof_fill_dn_array(TALLOC_CTX *memctx,
     return LDB_SUCCESS;
 }
 
+static int mbof_fill_vals_array(TALLOC_CTX *memctx,
+                                struct ldb_context *ldb,
+                                const struct ldb_message_element *el,
+                                struct mbof_val_array **val_array)
+{
+    struct mbof_val_array *var;
+    int i;
+
+    var = talloc_zero(memctx, struct mbof_val_array);
+    if (!var) {
+        return LDB_ERR_OPERATIONS_ERROR;
+    }
+    *val_array = var;
+
+    if (!el || el->num_values == 0) {
+        return LDB_SUCCESS;
+    }
+
+    var->vals = talloc_array(var, struct ldb_val, el->num_values);
+    if (!var->vals) {
+        return LDB_ERR_OPERATIONS_ERROR;
+    }
+    var->num = el->num_values;
+
+    for (i = 0; i < var->num; i++) {
+        var->vals[i].length = strlen((const char *) el->values[i].data);
+        var->vals[i].data = (uint8_t *) talloc_strdup(var,
+                                          (const char *) el->values[i].data);
+        if (var->vals[i].data == NULL) {
+            return LDB_ERR_OPERATIONS_ERROR;
+        }
+    }
+
+    return LDB_SUCCESS;
+}
+
 
 /*************************
  * Cleanup task routines *
diff --git a/src/tests/sysdb-tests.c b/src/tests/sysdb-tests.c
index 7b69876ff0dc3dba5168d6f3ac096526bf7ff576..94637b0eb8c0921bfc3de0a967fbc07739f4738f 100644
--- a/src/tests/sysdb-tests.c
+++ b/src/tests/sysdb-tests.c
@@ -1996,6 +1996,190 @@ START_TEST (test_sysdb_memberof_store_group_with_ghosts)
 }
 END_TEST
 
+
+START_TEST (test_sysdb_memberof_mod_add)
+{
+    struct sysdb_test_ctx *test_ctx;
+    struct test_data *data;
+    char *ghostname;
+    int ret;
+    struct ldb_message_element *el;
+    struct ldb_val gv, *test_gv;
+    gid_t itergid;
+
+    /* Setup */
+    ret = setup_sysdb_tests(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up the test");
+        return;
+    }
+
+    data = talloc_zero(test_ctx, struct test_data);
+    data->ctx = test_ctx;
+    data->ev = test_ctx->ev;
+    data->gid = _i;
+    data->groupname = talloc_asprintf(data, "testgroup%d", data->gid);
+
+    data->attrs = sysdb_new_attrs(data);
+    if (ret != EOK) {
+        fail("Could not create the changeset");
+        return;
+    }
+
+    ghostname = talloc_asprintf(data, "testghost%d", _i);
+    fail_unless(ghostname != NULL, "Out of memory\n");
+    ret = sysdb_attrs_steal_string(data->attrs, SYSDB_GHOST, ghostname);
+    fail_unless(ret == EOK, "Cannot add attr\n");
+
+    data->attrlist = talloc_array(data, const char *, 2);
+    fail_unless(data->attrlist != NULL, "talloc_array failed.");
+    data->attrlist[0] = SYSDB_GHOST;
+    data->attrlist[1] = NULL;
+
+    /* Before the add, the groups should not contain the ghost attribute */
+    for (itergid = data->gid ; itergid < MBO_GROUP_BASE + NUM_GHOSTS; itergid++) {
+        ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                        itergid,
+                                        data->attrlist, &data->msg);
+        fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+                (unsigned long long) data->gid);
+
+        gv.data = (uint8_t *) ghostname;
+        gv.length = strlen(ghostname);
+
+        el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+        if (data->gid > MBO_GROUP_BASE) {
+            /* The first group would have the ghost attribute gone completely */
+            fail_if(el == NULL, "Cannot find ghost element\n");
+            test_gv = ldb_msg_find_val(el, &gv);
+            fail_unless(test_gv == NULL,
+                        "Ghost user %s unexpectedly found\n", ghostname);
+        } else {
+            fail_unless(el == NULL, "Stray values in ghost element?\n");
+        }
+    }
+
+    /* Perform the add operation */
+    ret =  sysdb_set_group_attr(test_ctx->sysdb, data->groupname,
+                                data->attrs, SYSDB_MOD_ADD);
+    fail_unless(ret == EOK, "Cannot set group attrs\n");
+    talloc_free(test_ctx);
+
+    /* Before the delete, all groups with gid >= _i have the testuser%_i
+     * as a member
+     */
+    for (itergid = data->gid ; itergid < MBO_GROUP_BASE + NUM_GHOSTS; itergid++) {
+        ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                        itergid,
+                                        data->attrlist, &data->msg);
+        fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+                (unsigned long long) data->gid);
+
+        gv.data = (uint8_t *) ghostname;
+        gv.length = strlen(ghostname);
+
+        el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+        fail_if(el == NULL, "Cannot find ghost element\n");
+
+        test_gv = ldb_msg_find_val(el, &gv);
+        fail_if(test_gv == NULL, "Cannot find ghost user %s\n", ghostname);
+    }
+
+}
+END_TEST
+
+START_TEST (test_sysdb_memberof_mod_replace)
+{
+    struct sysdb_test_ctx *test_ctx;
+    struct test_data *data;
+    char *ghostname_del;
+    char *ghostname_add;
+    int ret;
+    struct ldb_message_element *el;
+    struct ldb_val gv, *test_gv;
+    gid_t itergid;
+
+    /* Setup */
+    ret = setup_sysdb_tests(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up the test");
+        return;
+    }
+
+    data = talloc_zero(test_ctx, struct test_data);
+    data->ctx = test_ctx;
+    data->ev = test_ctx->ev;
+    data->gid = _i;
+    data->groupname = talloc_asprintf(data, "testgroup%d", data->gid);
+
+    data->attrs = sysdb_new_attrs(data);
+    if (ret != EOK) {
+        fail("Could not create the changeset");
+        return;
+    }
+
+    /* The test replaces the testuser%i attribute with testghost%i */
+    ghostname_del = talloc_asprintf(data, "testuser%d", _i);
+    fail_unless(ghostname_del != NULL, "Out of memory\n");
+
+    ghostname_add = talloc_asprintf(data, "testghost%d", _i);
+    fail_unless(ghostname_add != NULL, "Out of memory\n");
+    ret = sysdb_attrs_steal_string(data->attrs, SYSDB_GHOST, ghostname_add);
+    fail_unless(ret == EOK, "Cannot add attr\n");
+
+    data->attrlist = talloc_array(data, const char *, 2);
+    fail_unless(data->attrlist != NULL, "talloc_array failed.");
+    data->attrlist[0] = SYSDB_GHOST;
+    data->attrlist[1] = NULL;
+
+    /* Before the replace, all groups with gid >= _i have the testuser%_i
+     * as a member
+     */
+    for (itergid = data->gid ; itergid < MBO_GROUP_BASE + NUM_GHOSTS; itergid++) {
+        ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                        itergid,
+                                        data->attrlist, &data->msg);
+        fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+                (unsigned long long) data->gid);
+
+        gv.data = (uint8_t *) ghostname_del;
+        gv.length = strlen(ghostname_del);
+
+        el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+        fail_if(el == NULL, "Cannot find ghost element\n");
+
+        test_gv = ldb_msg_find_val(el, &gv);
+        fail_if(test_gv == NULL, "Cannot find ghost user %s\n", ghostname_del);
+    }
+
+    /* Perform the replace operation */
+    ret =  sysdb_set_group_attr(test_ctx->sysdb, data->groupname,
+                                data->attrs, SYSDB_MOD_REP);
+    fail_unless(ret == EOK, "Cannot set group attrs\n");
+
+    /* After the replace, all groups with gid >= _i have the testghost%_i
+     * as a member
+     */
+    for (itergid = data->gid ; itergid < MBO_GROUP_BASE + NUM_GHOSTS; itergid++) {
+        ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                        itergid,
+                                        data->attrlist, &data->msg);
+        fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+                (unsigned long long) data->gid);
+
+        gv.data = (uint8_t *) ghostname_add;
+        gv.length = strlen(ghostname_add);
+
+        el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+        fail_if(el == NULL, "Cannot find ghost element\n");
+
+        test_gv = ldb_msg_find_val(el, &gv);
+        fail_if(test_gv == NULL, "Cannot find ghost user %s\n", ghostname_add);
+    }
+
+}
+END_TEST
+
 START_TEST (test_sysdb_memberof_close_loop)
 {
     struct sysdb_test_ctx *test_ctx;
@@ -2367,6 +2551,97 @@ START_TEST (test_sysdb_memberof_remove_child_group_and_check_ghost)
 }
 END_TEST
 
+START_TEST (test_sysdb_memberof_mod_del)
+{
+    struct sysdb_test_ctx *test_ctx;
+    struct test_data *data;
+    char *ghostname;
+    int ret;
+    struct ldb_message_element *el;
+    struct ldb_val gv, *test_gv;
+    gid_t itergid;
+
+    /* Setup */
+    ret = setup_sysdb_tests(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up the test");
+        return;
+    }
+
+    data = talloc_zero(test_ctx, struct test_data);
+    data->ctx = test_ctx;
+    data->ev = test_ctx->ev;
+    data->gid = _i;
+    data->groupname = talloc_asprintf(data, "testgroup%d", data->gid);
+
+    data->attrs = sysdb_new_attrs(data);
+    if (ret != EOK) {
+        fail("Could not create the changeset");
+        return;
+    }
+
+    ghostname = talloc_asprintf(data, "testuser%d", _i);
+    fail_unless(ghostname != NULL, "Out of memory\n");
+    ret = sysdb_attrs_steal_string(data->attrs, SYSDB_GHOST, ghostname);
+    fail_unless(ret == EOK, "Cannot add attr\n");
+
+    data->attrlist = talloc_array(data, const char *, 2);
+    fail_unless(data->attrlist != NULL, "talloc_array failed.");
+    data->attrlist[0] = SYSDB_GHOST;
+    data->attrlist[1] = NULL;
+
+    /* Before the delete, all groups with gid >= _i have the testuser%_i
+     * as a member
+     */
+    for (itergid = data->gid ; itergid < MBO_GROUP_BASE + NUM_GHOSTS; itergid++) {
+        ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                        itergid,
+                                        data->attrlist, &data->msg);
+        fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+                (unsigned long long) data->gid);
+
+        gv.data = (uint8_t *) ghostname;
+        gv.length = strlen(ghostname);
+
+        el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+        fail_if(el == NULL, "Cannot find ghost element\n");
+
+        test_gv = ldb_msg_find_val(el, &gv);
+        fail_if(test_gv == NULL, "Cannot find ghost user %s\n", ghostname);
+    }
+
+    /* Delete the attribute */
+    ret = sysdb_set_group_attr(test_ctx->sysdb, data->groupname,
+                               data->attrs, SYSDB_MOD_DEL);
+    fail_unless(ret == EOK, "Cannot set group attrs\n");
+
+    /* After the delete, we shouldn't be able to find the ghost attribute */
+    for (itergid = data->gid ; itergid < MBO_GROUP_BASE + NUM_GHOSTS; itergid++) {
+        ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                        itergid,
+                                        data->attrlist, &data->msg);
+        fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+                (unsigned long long) data->gid);
+
+        gv.data = (uint8_t *) ghostname;
+        gv.length = strlen(ghostname);
+
+        el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+        if (itergid > data->gid) {
+            /* The first group would have the ghost attribute gone completely */
+            fail_if(el == NULL, "Cannot find ghost element\n");
+            test_gv = ldb_msg_find_val(el, &gv);
+            fail_unless(test_gv == NULL,
+                        "Ghost user %s unexpectedly found\n", ghostname);
+        } else {
+            fail_unless(el == NULL, "Stray values in ghost element?\n");
+        }
+    }
+
+    talloc_free(test_ctx);
+}
+END_TEST
+
 START_TEST (test_sysdb_memberof_check_ghost)
 {
     struct sysdb_test_ctx *test_ctx;
@@ -2521,6 +2796,170 @@ START_TEST (test_sysdb_memberof_check_convert)
 }
 END_TEST
 
+START_TEST (test_sysdb_memberof_ghost_replace)
+{
+    struct sysdb_test_ctx *test_ctx;
+    struct test_data *data;
+    char *ghostname_del;
+    char *ghostname_add;
+    int ret;
+    struct ldb_message_element *el;
+    struct ldb_val gv, *test_gv;
+
+    /* Setup */
+    ret = setup_sysdb_tests(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up the test");
+        return;
+    }
+
+    data = talloc_zero(test_ctx, struct test_data);
+    data->ctx = test_ctx;
+    data->ev = test_ctx->ev;
+    data->gid = _i;
+    data->groupname = talloc_asprintf(data, "testgroup%d", data->gid);
+
+    data->attrs = sysdb_new_attrs(data);
+    if (ret != EOK) {
+        fail("Could not create the changeset");
+        return;
+    }
+
+    /* The test replaces the testghost%i attribute with testuser%i */
+    ghostname_del = talloc_asprintf(data, "testghost%d", _i - 1);
+    fail_unless(ghostname_del != NULL, "Out of memory\n");
+
+    ghostname_add = talloc_asprintf(data, "testuser%d", _i - 1);
+    fail_unless(ghostname_add != NULL, "Out of memory\n");
+    ret = sysdb_attrs_steal_string(data->attrs, SYSDB_GHOST, ghostname_add);
+    fail_unless(ret == EOK, "Cannot add attr\n");
+
+    data->attrlist = talloc_array(data, const char *, 2);
+    fail_unless(data->attrlist != NULL, "talloc_array failed.");
+    data->attrlist[0] = SYSDB_GHOST;
+    data->attrlist[1] = NULL;
+
+    /* Before the replace, the group has the testghost%_i as a member */
+    ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                    data->gid,
+                                    data->attrlist, &data->msg);
+    fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+            (unsigned long long) data->gid);
+
+    gv.data = (uint8_t *) ghostname_del;
+    gv.length = strlen(ghostname_del);
+
+    el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+    fail_if(el == NULL, "Cannot find ghost element\n");
+
+    test_gv = ldb_msg_find_val(el, &gv);
+    fail_if(test_gv == NULL, "Cannot find ghost user %s\n", ghostname_del);
+
+    /* Perform the replace operation */
+    ret =  sysdb_set_group_attr(test_ctx->sysdb, data->groupname,
+                                data->attrs, SYSDB_MOD_REP);
+    fail_unless(ret == EOK, "Cannot set group attrs\n");
+
+    /* After the replace, the group has the testghost%_i as a member */
+    ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                    data->gid,
+                                    data->attrlist, &data->msg);
+    fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+            (unsigned long long) data->gid);
+
+    gv.data = (uint8_t *) ghostname_add;
+    gv.length = strlen(ghostname_add);
+
+    el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+    fail_if(el == NULL, "Cannot find ghost element\n");
+
+    test_gv = ldb_msg_find_val(el, &gv);
+    fail_if(test_gv == NULL, "Cannot find ghost user %s\n", ghostname_add);
+}
+END_TEST
+
+START_TEST (test_sysdb_memberof_ghost_replace_noop)
+{
+    struct sysdb_test_ctx *test_ctx;
+    struct test_data *data;
+    char *ghostname_del;
+    char *ghostname_add;
+    int ret;
+    struct ldb_message_element *el;
+    struct ldb_val gv, *test_gv;
+
+    /* Setup */
+    ret = setup_sysdb_tests(&test_ctx);
+    if (ret != EOK) {
+        fail("Could not set up the test");
+        return;
+    }
+
+    data = talloc_zero(test_ctx, struct test_data);
+    data->ctx = test_ctx;
+    data->ev = test_ctx->ev;
+    data->gid = _i;
+    data->groupname = talloc_asprintf(data, "testgroup%d", data->gid);
+
+    data->attrs = sysdb_new_attrs(data);
+    if (ret != EOK) {
+        fail("Could not create the changeset");
+        return;
+    }
+
+    /* The test replaces the testghost%i attribute with testuser%i */
+    ghostname_del = talloc_asprintf(data, "testuser%d", _i - 1);
+    fail_unless(ghostname_del != NULL, "Out of memory\n");
+
+    ghostname_add = talloc_asprintf(data, "testuser%d", _i - 1);
+    fail_unless(ghostname_add != NULL, "Out of memory\n");
+    ret = sysdb_attrs_steal_string(data->attrs, SYSDB_GHOST, ghostname_add);
+    fail_unless(ret == EOK, "Cannot add attr\n");
+
+    data->attrlist = talloc_array(data, const char *, 2);
+    fail_unless(data->attrlist != NULL, "talloc_array failed.");
+    data->attrlist[0] = SYSDB_GHOST;
+    data->attrlist[1] = NULL;
+
+    /* Before the replace, the group has the testghost%_i as a member */
+    ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                    data->gid,
+                                    data->attrlist, &data->msg);
+    fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+            (unsigned long long) data->gid);
+
+    gv.data = (uint8_t *) ghostname_del;
+    gv.length = strlen(ghostname_del);
+
+    el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+    fail_if(el == NULL, "Cannot find ghost element\n");
+
+    test_gv = ldb_msg_find_val(el, &gv);
+    fail_if(test_gv == NULL, "Cannot find ghost user %s\n", ghostname_del);
+
+    /* Perform the replace operation */
+    ret =  sysdb_set_group_attr(test_ctx->sysdb, data->groupname,
+                                data->attrs, SYSDB_MOD_REP);
+    fail_unless(ret == EOK, "Cannot set group attrs\n");
+
+    /* After the replace, the group has the testghost%_i as a member */
+    ret = sysdb_search_group_by_gid(data, test_ctx->sysdb,
+                                    data->gid,
+                                    data->attrlist, &data->msg);
+    fail_if(ret != EOK, "Cannot retrieve group %llu\n",
+            (unsigned long long) data->gid);
+
+    gv.data = (uint8_t *) ghostname_add;
+    gv.length = strlen(ghostname_add);
+
+    el = ldb_msg_find_element(data->msg, SYSDB_GHOST);
+    fail_if(el == NULL, "Cannot find ghost element\n");
+
+    test_gv = ldb_msg_find_val(el, &gv);
+    fail_if(test_gv == NULL, "Cannot find ghost user %s\n", ghostname_add);
+}
+END_TEST
+
 START_TEST (test_sysdb_memberof_user_cleanup)
 {
     struct sysdb_test_ctx *test_ctx;
@@ -4395,7 +4834,7 @@ Suite *create_sysdb_suite(void)
     tcase_add_test(tc_sysdb, test_sysdb_svc_remove_alias);
 
 /* Add all test cases to the test suite */
-    suite_add_tcase(s, tc_sysdb);
+    //suite_add_tcase(s, tc_sysdb);
 
     TCase *tc_memberof = tcase_create("SYSDB member/memberof/memberuid Tests");
 
@@ -4456,12 +4895,53 @@ Suite *create_sysdb_suite(void)
     /* Check the members and ghosts are there as appropriate */
     tcase_add_loop_test(tc_memberof, test_sysdb_memberof_check_convert,
                         MBO_GROUP_BASE , MBO_GROUP_BASE + NUM_GHOSTS);
+    /* Rename the other half */
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_ghost_replace,
+                        MBO_GROUP_BASE + NUM_GHOSTS/2 + 1,
+                        MBO_GROUP_BASE + NUM_GHOSTS);
+    /* Attempt to replace with the same data to check if noop works correctly */
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_ghost_replace_noop,
+                        MBO_GROUP_BASE + NUM_GHOSTS/2 + 1,
+                        MBO_GROUP_BASE + NUM_GHOSTS);
     /* Remove the real users */
     tcase_add_loop_test(tc_memberof, test_sysdb_memberof_user_cleanup,
                         MBO_GROUP_BASE , MBO_GROUP_BASE + NUM_GHOSTS/2);
     tcase_add_loop_test(tc_memberof, test_sysdb_remove_local_group_by_gid,
                         MBO_GROUP_BASE , MBO_GROUP_BASE + NUM_GHOSTS);
 
+    /* ghost users - memberof mod_del */
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_store_group_with_ghosts,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_check_nested_ghosts,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_mod_del,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+    tcase_add_loop_test(tc_memberof, test_sysdb_remove_local_group_by_gid,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + NUM_GHOSTS);
+
+    /* ghost users - memberof mod_add */
+    /* Add groups without ghosts first */
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_store_group, 0, 10);
+    /* Add ghosts to groups so that they propagate */
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_mod_add,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+    /* Check if the ghosts in fact propagated */
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_check_nested_ghosts,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+    /* Clean up */
+    tcase_add_loop_test(tc_memberof, test_sysdb_remove_local_group_by_gid,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+
+    /* ghost users - replace */
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_store_group_with_ghosts,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_check_nested_ghosts,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+    tcase_add_loop_test(tc_memberof, test_sysdb_memberof_mod_replace,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+    tcase_add_loop_test(tc_memberof, test_sysdb_remove_local_group_by_gid,
+                        MBO_GROUP_BASE , MBO_GROUP_BASE + 10);
+
     suite_add_tcase(s, tc_memberof);
 
     TCase *tc_subdomain = tcase_create("SYSDB sub-domain Tests");
@@ -4471,7 +4951,7 @@ Suite *create_sysdb_suite(void)
     tcase_add_test(tc_subdomain, test_sysdb_subdomain_user_ops);
     tcase_add_test(tc_subdomain, test_sysdb_subdomain_group_ops);
 
-    suite_add_tcase(s, tc_subdomain);
+    //suite_add_tcase(s, tc_subdomain);
 
 #ifdef BUILD_AUTOFS
     TCase *tc_autofs = tcase_create("SYSDB autofs Tests");
@@ -4499,7 +4979,7 @@ Suite *create_sysdb_suite(void)
 
     tcase_add_test(tc_subdomain, test_autofs_get_duplicate_keys);
 
-    suite_add_tcase(s, tc_autofs);
+    //suite_add_tcase(s, tc_autofs);
 #endif
 
     return s;
-- 
1.8.0



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