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authorJan Zeleny <jzeleny@redhat.com>2011-03-31 08:22:22 -0400
committerStephen Gallagher <sgallagh@redhat.com>2011-04-25 08:06:34 -0400
commit7a0e6e2b9fc2fffc10f33e90926bb7edb5198dde (patch)
tree80bac9f6b951366923e29010117d633208b6ffda /src/responder
parent8cf1b4183577237d965068d70cd06bd0716aea84 (diff)
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Don't use negative cache in netgroup lookup
In responder a negative cache is used to indicate that the record has not been found by previous lookup. This approach is however not applicable for netgroup lookup because the design of their lookup is a little different. This patch removes some pieces of code working with negative cache, because they didn't fuction well. Instead a new flag has been added to the positive cache. This flag indicates if the record in the cache is a record of existing netgroup or it's just a placeholder. https://fedorahosted.org/sssd/ticket/820
Diffstat (limited to 'src/responder')
-rw-r--r--src/responder/nss/nsssrv_netgroup.c39
-rw-r--r--src/responder/nss/nsssrv_private.h1
2 files changed, 20 insertions, 20 deletions
diff --git a/src/responder/nss/nsssrv_netgroup.c b/src/responder/nss/nsssrv_netgroup.c
index dbee7f2de..df3823ed2 100644
--- a/src/responder/nss/nsssrv_netgroup.c
+++ b/src/responder/nss/nsssrv_netgroup.c
@@ -231,10 +231,16 @@ static struct tevent_req *setnetgrent_send(TALLOC_CTX *mem_ctx,
* Check whether it's ready for processing.
*/
if (state->netgr->ready) {
- /* Ready to process results */
- tevent_req_done(req);
- tevent_req_post(req, nctx->rctx->ev);
- return req;
+ if (state->netgr->found) {
+ /* Ready to process results */
+ tevent_req_done(req);
+ tevent_req_post(req, nctx->rctx->ev);
+ return req;
+ } else {
+ tevent_req_error(req, ENOENT);
+ tevent_req_post(req, nctx->rctx->ev);
+ return req;
+ }
}
/* Result object is still being constructed
@@ -387,22 +393,6 @@ static errno_t lookup_netgr_step(struct setent_step_ctx *step_ctx)
/* make sure to update the dctx if we changed domain */
step_ctx->dctx->domain = dom;
- /* verify this netgroup has not yet been negatively cached */
- ret = sss_ncache_check_netgr(step_ctx->nctx->ncache,
- step_ctx->nctx->neg_timeout,
- dom->name, step_ctx->name);
-
- /* if neg cached, return we didn't find it */
- if (ret == EEXIST) {
- DEBUG(2, ("Netgroup [%s] does not exist! (negative cache)\n",
- step_ctx->name));
- /* if a multidomain search, try with next */
- if (step_ctx->check_next) {
- dom = dom->next;
- continue;
- }
- }
-
DEBUG(4, ("Requesting info for [%s@%s]\n",
step_ctx->name, dom->name));
ret = sysdb_get_ctx_from_list(step_ctx->rctx->db_list, dom, &sysdb);
@@ -445,6 +435,9 @@ static errno_t lookup_netgr_step(struct setent_step_ctx *step_ctx)
&netgr->entries);
if (ret == ENOENT) {
/* This netgroup was not found in this domain */
+ DEBUG(2, ("No results for netgroup %s (domain %s)\n",
+ step_ctx->name, dom->name));
+
if (!step_ctx->dctx->check_provider) {
if (step_ctx->check_next) {
dom = dom->next;
@@ -458,6 +451,7 @@ static errno_t lookup_netgr_step(struct setent_step_ctx *step_ctx)
if (ret != EOK) {
DEBUG(1, ("Failed to convert results into entries\n"));
netgr->ready = true;
+ netgr->found = false;
set_netgr_lifetime(step_ctx->nctx->neg_timeout, step_ctx, netgr);
return EIO;
}
@@ -484,6 +478,7 @@ static errno_t lookup_netgr_step(struct setent_step_ctx *step_ctx)
DEBUG(6, ("Returning info for netgroup [%s@%s]\n",
step_ctx->name, dom->name));
netgr->ready = true;
+ netgr->found = true;
set_netgr_lifetime(dom->entry_cache_timeout, step_ctx, netgr);
return EOK;
}
@@ -497,6 +492,7 @@ static errno_t lookup_netgr_step(struct setent_step_ctx *step_ctx)
DEBUG(1, ("talloc_zero failed, ignored.\n"));
} else {
netgr->ready = true;
+ netgr->found = false;
netgr->entries = NULL;
netgr->lookup_table = step_ctx->nctx->netgroups;
netgr->name = talloc_strdup(netgr, step_ctx->name);
@@ -691,6 +687,9 @@ int nss_cmd_getnetgrent(struct cli_ctx *client)
tevent_req_set_callback(req, setnetgrent_implicit_done, cmdctx);
return EOK;
+ } else if (!netgr->found) {
+ DEBUG(6, ("Results for [%s] not found.\n", client->netgr_name));
+ return ENOENT;
}
DEBUG(6, ("Returning results for [%s]\n", client->netgr_name));
diff --git a/src/responder/nss/nsssrv_private.h b/src/responder/nss/nsssrv_private.h
index 52c4ace3a..27b0e567e 100644
--- a/src/responder/nss/nsssrv_private.h
+++ b/src/responder/nss/nsssrv_private.h
@@ -64,6 +64,7 @@ struct getent_ctx {
struct sysdb_netgroup_ctx **entries;
char *name;
char *domain;
+ bool found;
};
struct nss_dom_ctx {