sysdb: convert sysdb_search_user_by_name/uid

2 files changed, 174 insertions, 459 deletions

diff --git a/src/db/sysdb.h b/src/db/sysdb.h
index b7c53e1d0..9e638f500 100644
--- a/src/db/sysdb.h
+++ b/src/db/sysdb.h
@@ -352,23 +352,19 @@ int sysdb_search_entry(TALLOC_CTX *mem_ctx,
                        struct ldb_message ***msgs);
 
 /* Search User (by uid or name) */
-struct tevent_req *sysdb_search_user_by_name_send(TALLOC_CTX *mem_ctx,
-                                                  struct tevent_context *ev,
-                                                  struct sysdb_ctx *sysdb,
-                                                  struct sysdb_handle *handle,
-                                                  struct sss_domain_info *domain,
-                                                  const char *name,
-                                                  const char **attrs);
-struct tevent_req *sysdb_search_user_by_uid_send(TALLOC_CTX *mem_ctx,
-                                                 struct tevent_context *ev,
-                                                 struct sysdb_ctx *sysdb,
-                                                 struct sysdb_handle *handle,
-                                                 struct sss_domain_info *domain,
-                                                 uid_t uid,
-                                                 const char **attrs);
-int sysdb_search_user_recv(struct tevent_req *req,
-                           TALLOC_CTX *mem_ctx,
-                           struct ldb_message **msg);
+int sysdb_search_user_by_name(TALLOC_CTX *mem_ctx,
+                              struct sysdb_ctx *ctx,
+                              struct sss_domain_info *domain,
+                              const char *name,
+                              const char **attrs,
+                              struct ldb_message **msg);
+
+int sysdb_search_user_by_uid(TALLOC_CTX *mem_ctx,
+                             struct sysdb_ctx *ctx,
+                             struct sss_domain_info *domain,
+                             uid_t uid,
+                             const char **attrs,
+                             struct ldb_message **msg);
 
 /* Search Group (gy gid or name) */
 struct tevent_req *sysdb_search_group_by_name_send(TALLOC_CTX *mem_ctx,
diff --git a/src/db/sysdb_ops.c b/src/db/sysdb_ops.c
index 830e28efc..d0cdcc378 100644
--- a/src/db/sysdb_ops.c
+++ b/src/db/sysdb_ops.c
@@ -350,193 +350,95 @@ int sysdb_search_entry(TALLOC_CTX *mem_ctx,
 
 /* =Search-User-by-[UID/NAME]============================================= */
 
-struct sysdb_search_user_state {
-    struct tevent_context *ev;
-    struct sysdb_handle *handle;
-
-    struct ldb_dn *basedn;
-    const char **attrs;
-    const char *filter;
-    int scope;
-
-    size_t msgs_count;
-    struct ldb_message **msgs;
-};
-
-static void sysdb_search_user_cont(struct tevent_req *subreq);
-
-struct tevent_req *sysdb_search_user_by_name_send(TALLOC_CTX *mem_ctx,
-                                                  struct tevent_context *ev,
-                                                  struct sysdb_ctx *sysdb,
-                                                  struct sysdb_handle *handle,
-                                                  struct sss_domain_info *domain,
-                                                  const char *name,
-                                                  const char **attrs)
+int sysdb_search_user_by_name(TALLOC_CTX *mem_ctx,
+                              struct sysdb_ctx *ctx,
+                              struct sss_domain_info *domain,
+                              const char *name,
+                              const char **attrs,
+                              struct ldb_message **msg)
 {
-    struct tevent_req *req, *subreq;
-    struct sysdb_search_user_state *state;
-    static const char *def_attrs[] = { SYSDB_NAME, SYSDB_UIDNUM, NULL };
+    TALLOC_CTX *tmpctx;
+    const char *def_attrs[] = { SYSDB_NAME, SYSDB_UIDNUM, NULL };
+    struct ldb_message **msgs = NULL;
+    struct ldb_dn *basedn;
+    size_t msgs_count = 0;
     int ret;
 
-    if (!sysdb && !handle) return NULL;
-
-    req = tevent_req_create(mem_ctx, &state, struct sysdb_search_user_state);
-    if (!req) return NULL;
-
-    state->ev = ev;
-    state->handle = handle;
-    state->msgs_count = 0;
-    state->msgs = NULL;
-
-    state->attrs = attrs ? attrs : def_attrs;
-    state->filter = NULL;
-    state->scope = LDB_SCOPE_BASE;
-
-    if (!sysdb) sysdb = handle->ctx;
-
-    state->basedn = sysdb_user_dn(sysdb, state, domain->name, name);
-    if (!state->basedn) {
-        ERROR_OUT(ret, ENOMEM, fail);
+    tmpctx = talloc_new(mem_ctx);
+    if (!tmpctx) {
+        return ENOMEM;
     }
 
-    if (!handle) {
-        subreq = sysdb_operation_send(state, state->ev, sysdb);
-        if (!subreq) {
-            ERROR_OUT(ret, ENOMEM, fail);
-        }
-        tevent_req_set_callback(subreq, sysdb_search_user_cont, req);
+    basedn = sysdb_user_dn(ctx, tmpctx, domain->name, name);
+    if (!basedn) {
+        ret = ENOMEM;
+        goto done;
     }
-    else {
-        ret = sysdb_search_entry(state, state->handle->ctx, state->basedn,
-                                 state->scope, state->filter, state->attrs,
-                                 &state->msgs_count, &state->msgs);
-        if (ret) {
-            goto fail;
-        }
-        tevent_req_done(req);
-        tevent_req_post(req, ev);
+
+    ret = sysdb_search_entry(tmpctx, ctx, basedn, LDB_SCOPE_BASE, NULL,
+                             attrs?attrs:def_attrs, &msgs_count, &msgs);
+    if (ret) {
+        goto done;
     }
 
-    return req;
+    *msg = talloc_steal(mem_ctx, msgs[0]);
 
-fail:
-    DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-    tevent_req_error(req, ret);
-    tevent_req_post(req, ev);
-    return req;
+done:
+    if (ret) {
+        DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
+    }
+    talloc_zfree(tmpctx);
+    return ret;
 }
 
-struct tevent_req *sysdb_search_user_by_uid_send(TALLOC_CTX *mem_ctx,
-                                                 struct tevent_context *ev,
-                                                 struct sysdb_ctx *sysdb,
-                                                 struct sysdb_handle *handle,
-                                                 struct sss_domain_info *domain,
-                                                 uid_t uid,
-                                                 const char **attrs)
+int sysdb_search_user_by_uid(TALLOC_CTX *mem_ctx,
+                             struct sysdb_ctx *ctx,
+                             struct sss_domain_info *domain,
+                             uid_t uid,
+                             const char **attrs,
+                             struct ldb_message **msg)
 {
-    struct tevent_req *req, *subreq;
-    struct sysdb_search_user_state *state;
-    static const char *def_attrs[] = { SYSDB_NAME, SYSDB_UIDNUM, NULL };
+    TALLOC_CTX *tmpctx;
+    const char *def_attrs[] = { SYSDB_NAME, SYSDB_UIDNUM, NULL };
+    struct ldb_message **msgs = NULL;
+    struct ldb_dn *basedn;
+    size_t msgs_count = 0;
+    char *filter;
     int ret;
 
-    if (!sysdb && !handle) return NULL;
-
-    req = tevent_req_create(mem_ctx, &state, struct sysdb_search_user_state);
-    if (!req) return NULL;
-
-    state->ev = ev;
-    state->handle = handle;
-    state->msgs_count = 0;
-    state->msgs = NULL;
-    state->attrs = attrs ? attrs : def_attrs;
-
-    if (!sysdb) sysdb = handle->ctx;
-
-    state->basedn = ldb_dn_new_fmt(state, sysdb->ldb,
-                                   SYSDB_TMPL_USER_BASE, domain->name);
-    if (!state->basedn) {
-        ERROR_OUT(ret, ENOMEM, fail);
-    }
-
-    state->filter = talloc_asprintf(state, SYSDB_PWUID_FILTER,
-                                    (unsigned long)uid);
-    if (!state->filter) {
-        ERROR_OUT(ret, ENOMEM, fail);
+    tmpctx = talloc_new(mem_ctx);
+    if (!tmpctx) {
+        return ENOMEM;
     }
 
-    state->scope = LDB_SCOPE_ONELEVEL;
-
-    if (!handle) {
-        subreq = sysdb_operation_send(state, state->ev, sysdb);
-        if (!subreq) {
-            ERROR_OUT(ret, ENOMEM, fail);
-        }
-        tevent_req_set_callback(subreq, sysdb_search_user_cont, req);
-    }
-    else {
-        ret = sysdb_search_entry(state, state->handle->ctx, state->basedn,
-                                 state->scope, state->filter, state->attrs,
-                                 &state->msgs_count, &state->msgs);
-        if (ret) {
-            goto fail;
-        }
-        tevent_req_done(req);
-        tevent_req_post(req, ev);
+    basedn = ldb_dn_new_fmt(tmpctx, ctx->ldb,
+                            SYSDB_TMPL_USER_BASE, domain->name);
+    if (!basedn) {
+        ret = ENOMEM;
+        goto done;
     }
 
-    return req;
-
-fail:
-    DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-    tevent_req_error(req, ret);
-    tevent_req_post(req, ev);
-    return req;
-}
-
-static void sysdb_search_user_cont(struct tevent_req *subreq)
-{
-    struct tevent_req *req = tevent_req_callback_data(subreq,
-                                                      struct tevent_req);
-    struct sysdb_search_user_state *state = tevent_req_data(req,
-                                            struct sysdb_search_user_state);
-    int ret;
-
-    ret = sysdb_operation_recv(subreq, state, &state->handle);
-    talloc_zfree(subreq);
-    if (ret) {
-        DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-        tevent_req_error(req, ret);
-        return;
+    filter = talloc_asprintf(tmpctx, SYSDB_PWUID_FILTER, (unsigned long)uid);
+    if (!filter) {
+        ret = ENOMEM;
+        goto done;
     }
 
-    ret = sysdb_search_entry(state, state->handle->ctx, state->basedn,
-                             state->scope, state->filter, state->attrs,
-                             &state->msgs_count, &state->msgs);
+    ret = sysdb_search_entry(tmpctx, ctx, basedn, LDB_SCOPE_ONELEVEL, filter,
+                             attrs?attrs:def_attrs, &msgs_count, &msgs);
     if (ret) {
-        tevent_req_error(req, ret);
-        return;
+        goto done;
     }
 
-    tevent_req_done(req);
-}
-
-int sysdb_search_user_recv(struct tevent_req *req,
-                           TALLOC_CTX *mem_ctx,
-                           struct ldb_message **msg)
-{
-    struct sysdb_search_user_state *state = tevent_req_data(req,
-                                              struct sysdb_search_user_state);
-
-    TEVENT_REQ_RETURN_ON_ERROR(req);
+    *msg = talloc_steal(mem_ctx, msgs[0]);
 
-    if (state->msgs_count > 1) {
-        DEBUG(1, ("More than one result found.\n"));
-        return EFAULT;
+done:
+    if (ret) {
+        DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
     }
 
-    *msg = talloc_move(mem_ctx, &state->msgs[0]);
-
-    return EOK;
+    talloc_zfree(tmpctx);
+    return ret;
 }
 
 
@@ -1428,7 +1330,6 @@ struct sysdb_add_user_state {
 };
 
 static void sysdb_add_user_group_check(struct tevent_req *subreq);
-static void sysdb_add_user_uid_check(struct tevent_req *subreq);
 static void sysdb_add_user_basic_done(struct tevent_req *subreq);
 static void sysdb_add_user_get_id_done(struct tevent_req *subreq);
 static void sysdb_add_user_set_id_done(struct tevent_req *subreq);
@@ -1449,6 +1350,7 @@ struct tevent_req *sysdb_add_user_send(TALLOC_CTX *mem_ctx,
 {
     struct tevent_req *req, *subreq;
     struct sysdb_add_user_state *state;
+    struct ldb_message *msg;
     int ret;
 
     req = tevent_req_create(mem_ctx, &state, struct sysdb_add_user_state);
@@ -1505,13 +1407,12 @@ struct tevent_req *sysdb_add_user_send(TALLOC_CTX *mem_ctx,
 
     /* check no other user with the same uid exist */
     if (state->uid != 0) {
-        subreq = sysdb_search_user_by_uid_send(state, ev, NULL, handle,
-                                               domain, uid, NULL);
-        if (!subreq) {
-            ERROR_OUT(ret, ENOMEM, fail);
+        ret = sysdb_search_user_by_uid(state, handle->ctx,
+                                       domain, uid, NULL, &msg);
+        if (ret != ENOENT) {
+            if (ret == EOK) ret = EEXIST;
+            goto fail;
         }
-        tevent_req_set_callback(subreq, sysdb_add_user_uid_check, req);
-        return req;
     }
 
     /* try to add the user */
@@ -1525,7 +1426,7 @@ struct tevent_req *sysdb_add_user_send(TALLOC_CTX *mem_ctx,
     return req;
 
 fail:
-        DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
+    DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
     tevent_req_error(req, ret);
     tevent_req_post(req, ev);
     return req;
@@ -1553,52 +1454,13 @@ static void sysdb_add_user_group_check(struct tevent_req *subreq)
 
     /* check no other user with the same uid exist */
     if (state->uid != 0) {
-        subreq = sysdb_search_user_by_uid_send(state, state->ev,
-                                               NULL, state->handle,
-                                               state->domain, state->uid,
-                                               NULL);
-        if (!subreq) {
-            DEBUG(6, ("Error: Out of memory\n"));
-            tevent_req_error(req, ENOMEM);
+        ret = sysdb_search_user_by_uid(state, state->handle->ctx,
+                                       state->domain, state->uid, NULL, &msg);
+        if (ret != ENOENT) {
+            if (ret == EOK) ret = EEXIST;
+            tevent_req_error(req, ret);
             return;
         }
-        tevent_req_set_callback(subreq, sysdb_add_user_uid_check, req);
-        return;
-    }
-
-    /* try to add the user */
-    subreq = sysdb_add_basic_user_send(state, state->ev, state->handle,
-                                       state->domain, state->name,
-                                       state->uid, state->gid,
-                                       state->gecos,
-                                       state->homedir,
-                                       state->shell);
-    if (!subreq) {
-        DEBUG(6, ("Error: Out of memory\n"));
-        tevent_req_error(req, ENOMEM);
-        return;
-    }
-    tevent_req_set_callback(subreq, sysdb_add_user_basic_done, req);
-}
-
-static void sysdb_add_user_uid_check(struct tevent_req *subreq)
-{
-    struct tevent_req *req = tevent_req_callback_data(subreq,
-                                                      struct tevent_req);
-    struct sysdb_add_user_state *state = tevent_req_data(req,
-                                            struct sysdb_add_user_state);
-    struct ldb_message *msg;
-    int ret;
-
-    /* We can succeed only if we get an ENOENT error, which means no user
-     * with the same uid exist.
-     * If any other error is returned fail as well. */
-    ret = sysdb_search_user_recv(subreq, state, &msg);
-    talloc_zfree(subreq);
-    if (ret != ENOENT) {
-        if (ret == EOK) ret = EEXIST;
-        tevent_req_error(req, ret);
-        return;
     }
 
     /* try to add the user */
@@ -1882,7 +1744,6 @@ struct sysdb_add_group_state {
     int cache_timeout;
 };
 
-static void sysdb_add_group_user_check(struct tevent_req *subreq);
 static void sysdb_add_group_gid_check(struct tevent_req *subreq);
 static void sysdb_add_group_basic_done(struct tevent_req *subreq);
 static void sysdb_add_group_get_id_done(struct tevent_req *subreq);
@@ -1899,6 +1760,7 @@ struct tevent_req *sysdb_add_group_send(TALLOC_CTX *mem_ctx,
 {
     struct tevent_req *req, *subreq;
     struct sysdb_add_group_state *state;
+    struct ldb_message *msg;
     int ret;
 
     req = tevent_req_create(mem_ctx, &state, struct sysdb_add_group_state);
@@ -1925,13 +1787,12 @@ struct tevent_req *sysdb_add_group_send(TALLOC_CTX *mem_ctx,
          * Don't worry about users, if we try to add a user with the same
          * name the operation will fail */
 
-        subreq = sysdb_search_user_by_name_send(state, ev, NULL, handle,
-                                                domain, name, NULL);
-        if (!subreq) {
-            ERROR_OUT(ret, ENOMEM, fail);
+        ret = sysdb_search_user_by_name(state, handle->ctx,
+                                        domain, name, NULL, &msg);
+        if (ret != ENOENT) {
+            if (ret == EOK) ret = EEXIST;
+            goto fail;
         }
-        tevent_req_set_callback(subreq, sysdb_add_group_user_check, req);
-        return req;
     }
 
     /* check no other groups with the same gid exist */
@@ -1961,53 +1822,6 @@ fail:
     return req;
 }
 
-static void sysdb_add_group_user_check(struct tevent_req *subreq)
-{
-    struct tevent_req *req = tevent_req_callback_data(subreq,
-                                                      struct tevent_req);
-    struct sysdb_add_group_state *state = tevent_req_data(req,
-                                           struct sysdb_add_group_state);
-    struct ldb_message *msg;
-    int ret;
-
-    /* We can succeed only if we get an ENOENT error, which means no users
-     * with the same name exist.
-     * If any other error is returned fail as well. */
-    ret = sysdb_search_user_recv(subreq, state, &msg);
-    talloc_zfree(subreq);
-    if (ret != ENOENT) {
-        if (ret == EOK) ret = EEXIST;
-        tevent_req_error(req, ret);
-        return;
-    }
-
-    /* check no other group with the same gid exist */
-    if (state->gid != 0) {
-        subreq = sysdb_search_group_by_gid_send(state, state->ev,
-                                                NULL, state->handle,
-                                                state->domain, state->gid,
-                                                NULL);
-        if (!subreq) {
-            DEBUG(6, ("Error: Out of memory\n"));
-            tevent_req_error(req, ENOMEM);
-            return;
-        }
-        tevent_req_set_callback(subreq, sysdb_add_group_gid_check, req);
-        return;
-    }
-
-    /* try to add the group */
-    subreq = sysdb_add_basic_group_send(state, state->ev,
-                                        state->handle, state->domain,
-                                        state->name, state->gid);
-    if (!subreq) {
-        DEBUG(6, ("Error: Out of memory\n"));
-        tevent_req_error(req, ENOMEM);
-        return;
-    }
-    tevent_req_set_callback(subreq, sysdb_add_group_basic_done, req);
-}
-
 static void sysdb_add_group_gid_check(struct tevent_req *subreq)
 {
     struct tevent_req *req = tevent_req_callback_data(subreq,
@@ -2273,7 +2087,6 @@ struct sysdb_store_user_state {
     uint64_t cache_timeout;
 };
 
-static void sysdb_store_user_check(struct tevent_req *subreq);
 static void sysdb_store_user_add_done(struct tevent_req *subreq);
 static void sysdb_store_user_attr_done(struct tevent_req *subreq);
 
@@ -2292,6 +2105,8 @@ struct tevent_req *sysdb_store_user_send(TALLOC_CTX *mem_ctx,
 {
     struct tevent_req *req, *subreq;
     struct sysdb_store_user_state *state;
+    struct ldb_message *msg;
+    time_t now;
     int ret;
 
     req = tevent_req_create(mem_ctx, &state, struct sysdb_store_user_state);
@@ -2314,37 +2129,10 @@ struct tevent_req *sysdb_store_user_send(TALLOC_CTX *mem_ctx,
         if (ret) goto fail;
     }
 
-    subreq = sysdb_search_user_by_name_send(state, ev, NULL, handle,
-                                            domain, name, NULL);
-    if (!subreq) {
-        ERROR_OUT(ret, ENOMEM, fail);
-    }
-    tevent_req_set_callback(subreq, sysdb_store_user_check, req);
-
-    return req;
-
-fail:
-    DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-    tevent_req_error(req, ret);
-    tevent_req_post(req, ev);
-    return req;
-}
-
-static void sysdb_store_user_check(struct tevent_req *subreq)
-{
-    struct tevent_req *req = tevent_req_callback_data(subreq,
-                                                      struct tevent_req);
-    struct sysdb_store_user_state *state = tevent_req_data(req,
-                                               struct sysdb_store_user_state);
-    struct ldb_message *msg;
-    time_t now = time(NULL);
-    int ret;
-
-    ret = sysdb_search_user_recv(subreq, state, &msg);
-    talloc_zfree(subreq);
+    ret = sysdb_search_user_by_name(state, handle->ctx,
+                                    domain, name, NULL, &msg);
     if (ret && ret != ENOENT) {
-        tevent_req_error(req, ret);
-        return;
+        goto fail;
     }
 
     if (ret == ENOENT) {
@@ -2356,105 +2144,81 @@ static void sysdb_store_user_check(struct tevent_req *subreq)
                                      state->shell, state->attrs,
                                      state->cache_timeout);
         if (!subreq) {
-            DEBUG(6, ("Error: Out of memory\n"));
-            tevent_req_error(req, ENOMEM);
-            return;
+            ret = ENOMEM;
+            goto fail;
         }
         tevent_req_set_callback(subreq, sysdb_store_user_add_done, req);
-        return;
+
+        return req;
     }
 
     /* the user exists, let's just replace attributes when set */
     if (!state->attrs) {
         state->attrs = sysdb_new_attrs(state);
         if (!state->attrs) {
-            DEBUG(6, ("Error: Out of memory\n"));
-            tevent_req_error(req, ENOMEM);
-            return;
+            ret = ENOMEM;
+            goto fail;
         }
     }
 
     if (state->uid) {
         ret = sysdb_attrs_add_uint32(state->attrs, SYSDB_UIDNUM, state->uid);
-        if (ret) {
-            DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-            tevent_req_error(req, ret);
-            return;
-        }
+        if (ret) goto fail;
     }
 
     if (state->gid) {
         ret = sysdb_attrs_add_uint32(state->attrs, SYSDB_GIDNUM, state->gid);
-        if (ret) {
-            DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-            tevent_req_error(req, ret);
-            return;
-        }
+        if (ret) goto fail;
     }
 
     if (state->uid && !state->gid && state->handle->ctx->mpg) {
         ret = sysdb_attrs_add_uint32(state->attrs, SYSDB_GIDNUM, state->uid);
-        if (ret) {
-            DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-            tevent_req_error(req, ret);
-            return;
-        }
+        if (ret) goto fail;
     }
 
     if (state->gecos) {
         ret = sysdb_attrs_add_string(state->attrs, SYSDB_GECOS, state->gecos);
-        if (ret) {
-            DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-            tevent_req_error(req, ret);
-            return;
-        }
+        if (ret) goto fail;
     }
 
     if (state->homedir) {
         ret = sysdb_attrs_add_string(state->attrs,
                                      SYSDB_HOMEDIR, state->homedir);
-        if (ret) {
-            DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-            tevent_req_error(req, ret);
-            return;
-        }
+        if (ret) goto fail;
     }
 
     if (state->shell) {
         ret = sysdb_attrs_add_string(state->attrs, SYSDB_SHELL, state->shell);
-        if (ret) {
-            DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-            tevent_req_error(req, ret);
-            return;
-        }
+        if (ret) goto fail;
     }
 
+    now = time(NULL);
+
     ret = sysdb_attrs_add_time_t(state->attrs, SYSDB_LAST_UPDATE, now);
-    if (ret) {
-        DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-        tevent_req_error(req, ret);
-        return;
-    }
+    if (ret) goto fail;
 
     ret = sysdb_attrs_add_time_t(state->attrs, SYSDB_CACHE_EXPIRE,
                                  ((state->cache_timeout) ?
                                   (now + state->cache_timeout) : 0));
-    if (ret) {
-        DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
-        tevent_req_error(req, ret);
-        return;
-    }
+    if (ret) goto fail;
 
     subreq = sysdb_set_user_attr_send(state, state->ev,
                                       state->handle, state->domain,
                                       state->name, state->attrs,
                                       SYSDB_MOD_REP);
     if (!subreq) {
-        DEBUG(6, ("Error: Out of memory\n"));
-        tevent_req_error(req, ENOMEM);
-        return;
+        ret = ENOMEM;
+        goto fail;
     }
     tevent_req_set_callback(subreq, sysdb_store_user_attr_done, req);
+
+    return req;
+
+fail:
+    DEBUG(6, ("Error: %d (%s)\n", ret, strerror(ret)));
+    tevent_req_error(req, ret);
+    tevent_req_post(req, ev);
+    return req;
 }
 
 static void sysdb_store_user_add_done(struct tevent_req *subreq)
@@ -3864,7 +3628,6 @@ struct sysdb_delete_user_state {
 };
 
 void sysdb_delete_user_check_handle(struct tevent_req *subreq);
-static void sysdb_delete_user_done(struct tevent_req *subreq);
 
 struct tevent_req *sysdb_delete_user_send(TALLOC_CTX *mem_ctx,
                                           struct tevent_context *ev,
@@ -3903,7 +3666,7 @@ void sysdb_delete_user_check_handle(struct tevent_req *subreq)
                                                       struct tevent_req);
     struct sysdb_delete_user_state *state = tevent_req_data(req,
                                             struct sysdb_delete_user_state);
-    static const char *attrs[] = { SYSDB_NAME, SYSDB_UIDNUM, NULL };
+    struct ldb_message *msg;
     int ret;
 
     ret = sysdb_check_handle_recv(subreq, state, &state->handle);
@@ -3914,33 +3677,14 @@ void sysdb_delete_user_check_handle(struct tevent_req *subreq)
     }
 
     if (state->name) {
-        subreq = sysdb_search_user_by_name_send(state, state->ev, NULL,
-                                                state->handle, state->domain,
-                                                state->name, attrs);
+        ret = sysdb_search_user_by_name(state, state->handle->ctx,
+                                        state->domain, state->name,
+                                        NULL, &msg);
     } else {
-        subreq = sysdb_search_user_by_uid_send(state, state->ev, NULL,
-                                               state->handle, state->domain,
-                                               state->uid, NULL);
-    }
-
-    if (!subreq) {
-        tevent_req_error(req, ENOMEM);
-        return;
+        ret = sysdb_search_user_by_uid(state, state->handle->ctx,
+                                       state->domain, state->uid,
+                                       NULL, &msg);
     }
-    tevent_req_set_callback(subreq, sysdb_delete_user_done, req);
-}
-
-static void sysdb_delete_user_done(struct tevent_req *subreq)
-{
-    struct tevent_req *req = tevent_req_callback_data(subreq,
-                                                      struct tevent_req);
-    struct sysdb_delete_user_state *state = tevent_req_data(req,
-                                            struct sysdb_delete_user_state);
-    struct ldb_message *msg;
-    int ret;
-
-    ret = sysdb_search_user_recv(subreq, state, &msg);
-    talloc_zfree(subreq);
     if (ret) {
         tevent_req_error(req, ret);
         return;
@@ -4302,7 +4046,6 @@ errno_t check_failed_login_attempts(TALLOC_CTX *mem_ctx, struct confdb_ctx *cdb,
     return EOK;
 }
 
-static void sysdb_cache_auth_get_attrs_done(struct tevent_req *subreq);
 static void sysdb_cache_auth_transaction_start_done(struct tevent_req *subreq);
 static void sysdb_cache_auth_attr_update_done(struct tevent_req *subreq);
 static void sysdb_cache_auth_done(struct tevent_req *subreq);
@@ -4319,42 +4062,49 @@ struct tevent_req *sysdb_cache_auth_send(TALLOC_CTX *mem_ctx,
     struct tevent_req *req;
     struct tevent_req *subreq;
     struct sysdb_cache_auth_state *state;
+    const char *attrs[] = { SYSDB_NAME, SYSDB_CACHEDPWD, SYSDB_DISABLED,
+                            SYSDB_LAST_LOGIN, SYSDB_LAST_ONLINE_AUTH,
+                            "lastCachedPasswordChange",
+                            "accountExpires", SYSDB_FAILED_LOGIN_ATTEMPTS,
+                            SYSDB_LAST_FAILED_LOGIN, NULL };
+    struct ldb_message *ldb_msg;
+    const char *userhash;
+    char *comphash;
+    char *password = NULL;
+    uint64_t lastLogin = 0;
+    int cred_expiration;
+    uint32_t failed_login_attempts = 0;
+    int ret;
+    int i;
+
+    req = tevent_req_create(mem_ctx, &state, struct sysdb_cache_auth_state);
+    if (req == NULL) {
+        DEBUG(1, ("tevent_req_create failed.\n"));
+        return NULL;
+    }
 
     if (name == NULL || *name == '\0') {
         DEBUG(1, ("Missing user name.\n"));
-        return NULL;
+        ret = EINVAL;
+        goto done;
     }
 
     if (cdb == NULL) {
         DEBUG(1, ("Missing config db context.\n"));
-        return NULL;
+        ret = EINVAL;
+        goto done;
     }
 
     if (sysdb == NULL) {
         DEBUG(1, ("Missing sysdb db context.\n"));
-        return NULL;
+        ret = EINVAL;
+        goto done;
     }
 
     if (!domain->cache_credentials) {
         DEBUG(3, ("Cached credentials not available.\n"));
-        return NULL;
-    }
-
-    static const char *attrs[] = {SYSDB_NAME,
-                                  SYSDB_CACHEDPWD,
-                                  SYSDB_DISABLED,
-                                  SYSDB_LAST_LOGIN,
-                                  SYSDB_LAST_ONLINE_AUTH,
-                                  "lastCachedPasswordChange",
-                                  "accountExpires",
-                                  SYSDB_FAILED_LOGIN_ATTEMPTS,
-                                  SYSDB_LAST_FAILED_LOGIN,
-                                  NULL};
-
-    req = tevent_req_create(mem_ctx, &state, struct sysdb_cache_auth_state);
-    if (req == NULL) {
-        DEBUG(1, ("tevent_req_create failed.\n"));
-        return NULL;
+        ret = EINVAL;
+        goto done;
     }
 
     state->ev = ev;
@@ -4370,43 +4120,11 @@ struct tevent_req *sysdb_cache_auth_send(TALLOC_CTX *mem_ctx,
     state->expire_date = -1;
     state->delayed_until = -1;
 
-    subreq = sysdb_search_user_by_name_send(state, ev, sysdb, NULL, domain,
-                                            name, attrs);
-    if (subreq == NULL) {
-        DEBUG(1, ("sysdb_search_user_by_name_send failed.\n"));
-        talloc_zfree(req);
-        return NULL;
-    }
-    tevent_req_set_callback(subreq, sysdb_cache_auth_get_attrs_done, req);
-
-    return req;
-}
-
-static void sysdb_cache_auth_get_attrs_done(struct tevent_req *subreq)
-{
-    struct ldb_message *ldb_msg;
-    const char *userhash;
-    char *comphash;
-    char *password = NULL;
-    int i;
-    int ret;
-    uint64_t lastLogin = 0;
-    int cred_expiration;
-    uint32_t failed_login_attempts = 0;
-
-    struct tevent_req *req = tevent_req_callback_data(subreq,
-                                                      struct tevent_req);
-
-    struct sysdb_cache_auth_state *state = tevent_req_data(req,
-                                                 struct sysdb_cache_auth_state);
-
-    ret = sysdb_search_user_recv(subreq, state, &ldb_msg);
-    talloc_zfree(subreq);
+    ret = sysdb_search_user_by_name(state, sysdb, domain, name, attrs, &ldb_msg);
     if (ret != EOK) {
-        DEBUG(1, ("sysdb_search_user_by_name_send failed [%d][%s].\n",
+        DEBUG(1, ("sysdb_search_user_by_name failed [%d][%s].\n",
                   ret, strerror(ret)));
-        tevent_req_error(req, ENOENT);
-        return;
+        goto done;
     }
 
     /* Check offline_auth_cache_timeout */
@@ -4418,7 +4136,6 @@ static void sysdb_cache_auth_get_attrs_done(struct tevent_req *subreq)
                          CONFDB_PAM_CRED_TIMEOUT, 0, &cred_expiration);
     if (ret != EOK) {
         DEBUG(1, ("Failed to read expiration time of offline credentials.\n"));
-        ret = EACCES;
         goto done;
     }
     DEBUG(9, ("Offline credentials expiration is [%d] days.\n",
@@ -4440,6 +4157,7 @@ static void sysdb_cache_auth_get_attrs_done(struct tevent_req *subreq)
                                       &failed_login_attempts,
                                       &state->delayed_until);
     if (ret != EOK) {
+        DEBUG(1, ("Failed to check login attempts\n"));
         goto done;
     }
 
@@ -4470,6 +4188,7 @@ static void sysdb_cache_auth_get_attrs_done(struct tevent_req *subreq)
     state->update_attrs = sysdb_new_attrs(state);
     if (state->update_attrs == NULL) {
         DEBUG(1, ("sysdb_new_attrs failed.\n"));
+        ret = ENOMEM;
         goto done;
     }
 
@@ -4506,7 +4225,6 @@ static void sysdb_cache_auth_get_attrs_done(struct tevent_req *subreq)
                                      time(NULL));
         if (ret != EOK) {
             DEBUG(3, ("sysdb_attrs_add_time_t failed\n."));
-            ret = EINVAL;
             goto done;
         }
 
@@ -4515,7 +4233,6 @@ static void sysdb_cache_auth_get_attrs_done(struct tevent_req *subreq)
                                      ++failed_login_attempts);
         if (ret != EOK) {
             DEBUG(3, ("sysdb_attrs_add_uint32 failed.\n"));
-            ret = EINVAL;
             goto done;
         }
     }
@@ -4525,18 +4242,20 @@ static void sysdb_cache_auth_get_attrs_done(struct tevent_req *subreq)
         DEBUG(1, ("sysdb_transaction_send failed.\n"));
         goto done;
     }
-    tevent_req_set_callback(subreq, sysdb_cache_auth_transaction_start_done,
-                            req);
-    return;
+    tevent_req_set_callback(subreq,
+                            sysdb_cache_auth_transaction_start_done, req);
+
+    return req;
 
 done:
     if (password) for (i = 0; password[i]; i++) password[i] = 0;
-    if (ret == EOK) {
-        tevent_req_done(req);
-    } else {
+    if (ret) {
         tevent_req_error(req, ret);
+    } else {
+        tevent_req_done(req);
     }
-    return;
+    tevent_req_post(req, ev);
+    return req;
 }
 
 static void sysdb_cache_auth_transaction_start_done(struct tevent_req *subreq)