|
 |
aea863 |
autofs-5.1.4 - fix update_negative_cache() map source usage
|
|
|
aea863 |
|
|
|
aea863 |
From: Ian Kent <raven@themaw.net>
|
|
|
aea863 |
|
|
|
aea863 |
File map sources can be either plain text or executable.
|
|
|
aea863 |
|
|
|
aea863 |
When the map path is specified without a type (eg. when a
|
|
|
aea863 |
full path is used) an instance map source is used and the
|
|
|
aea863 |
original map is left unchanged.
|
|
|
aea863 |
|
|
|
aea863 |
But update_negative_cache() fails to take this into account
|
|
|
aea863 |
causing it to update the wrong map cache.
|
|
|
aea863 |
|
|
|
aea863 |
When a map reload is done the map entry appears to not exist
|
|
|
aea863 |
so the new map entry is added.
|
|
|
aea863 |
|
|
|
aea863 |
This could go unnoticed except that, after a map read, the
|
|
|
aea863 |
map entry cache cleans stale map entries and the existence
|
|
|
aea863 |
of this negative entry causes the new map entry to be deleted
|
|
|
aea863 |
and map lookups continue to fail.
|
|
|
aea863 |
|
|
|
aea863 |
In hindsite the use of an instance map source for this is
|
|
|
aea863 |
probably uneccessary but changing it will be risky so, for
|
|
|
aea863 |
now, just make update_negative_cache() use the correct map.
|
|
|
aea863 |
|
|
|
aea863 |
Signed-off-by: Ian Kent <raven@themaw.net>
|
|
|
aea863 |
---
|
|
|
aea863 |
CHANGELOG | 1 +
|
|
|
aea863 |
daemon/lookup.c | 38 ++++++++++++++++++++++++++++++++++++--
|
|
|
aea863 |
2 files changed, 37 insertions(+), 2 deletions(-)
|
|
|
aea863 |
|
|
|
aea863 |
--- autofs-5.1.4.orig/CHANGELOG
|
|
|
aea863 |
+++ autofs-5.1.4/CHANGELOG
|
|
|
aea863 |
@@ -28,6 +28,7 @@ xx/xx/2018 autofs-5.1.5
|
|
|
aea863 |
- add-man page note about extra slashes in paths.
|
|
|
aea863 |
- covarity fixes.
|
|
|
aea863 |
- fix program usage message.
|
|
|
aea863 |
+- fix update_negative_cache() map source usage.
|
|
|
aea863 |
|
|
|
aea863 |
19/12/2017 autofs-5.1.4
|
|
|
aea863 |
- fix spec file url.
|
|
|
aea863 |
--- autofs-5.1.4.orig/daemon/lookup.c
|
|
|
aea863 |
+++ autofs-5.1.4/daemon/lookup.c
|
|
|
aea863 |
@@ -1100,6 +1100,37 @@ static enum nsswitch_status lookup_map_n
|
|
|
aea863 |
return result;
|
|
|
aea863 |
}
|
|
|
aea863 |
|
|
|
aea863 |
+static struct map_source *lookup_get_map_source(struct master_mapent *entry)
|
|
|
aea863 |
+{
|
|
|
aea863 |
+ struct map_source *map = entry->maps;
|
|
|
aea863 |
+ struct stat st;
|
|
|
aea863 |
+ char *type;
|
|
|
aea863 |
+
|
|
|
aea863 |
+ if (map->type || *map->argv[0] != '/')
|
|
|
aea863 |
+ return map;
|
|
|
aea863 |
+
|
|
|
aea863 |
+ if (*(map->argv[0] + 1) == '/')
|
|
|
aea863 |
+ return map;
|
|
|
aea863 |
+
|
|
|
aea863 |
+ if (stat(map->argv[0], &st) == -1)
|
|
|
aea863 |
+ return NULL;
|
|
|
aea863 |
+
|
|
|
aea863 |
+ if (!S_ISREG(st.st_mode))
|
|
|
aea863 |
+ return NULL;
|
|
|
aea863 |
+
|
|
|
aea863 |
+ if (st.st_mode & __S_IEXEC)
|
|
|
aea863 |
+ type = "program";
|
|
|
aea863 |
+ else
|
|
|
aea863 |
+ type = "file";
|
|
|
aea863 |
+
|
|
|
aea863 |
+ /* This is a file source with a path starting with "/".
|
|
|
aea863 |
+ * But file maps can be either plain text or executable
|
|
|
aea863 |
+ * so they use a map instance and the actual map source
|
|
|
aea863 |
+ * remains untouched.
|
|
|
aea863 |
+ */
|
|
|
aea863 |
+ return master_find_source_instance(map, type, map->format, 0, NULL);
|
|
|
aea863 |
+}
|
|
|
aea863 |
+
|
|
|
aea863 |
static void update_negative_cache(struct autofs_point *ap, struct map_source *source, const char *name)
|
|
|
aea863 |
{
|
|
|
aea863 |
struct master_mapent *entry = ap->entry;
|
|
|
aea863 |
@@ -1133,11 +1164,14 @@ static void update_negative_cache(struct
|
|
|
aea863 |
logmsg("key \"%s\" not found in map source(s).", name);
|
|
|
aea863 |
}
|
|
|
aea863 |
|
|
|
aea863 |
- /* Doesn't exist in any source, just add it somewhere */
|
|
|
aea863 |
+ /* Doesn't exist in any source, just add it somewhere.
|
|
|
aea863 |
+ * Also take care to use the same map source used by
|
|
|
aea863 |
+ * map reads and key lookups for the update.
|
|
|
aea863 |
+ */
|
|
|
aea863 |
if (source)
|
|
|
aea863 |
map = source;
|
|
|
aea863 |
else
|
|
|
aea863 |
- map = entry->maps;
|
|
|
aea863 |
+ map = lookup_get_map_source(entry);
|
|
|
aea863 |
if (map) {
|
|
|
aea863 |
time_t now = monotonic_time(NULL);
|
|
|
aea863 |
int rv = CHE_FAIL;
|