From 9b95a5a9390b8fb21664ecfbc6126d570284852a Mon Sep 17 00:00:00 2001
From: Alasdair Kergon <agk@redhat.com>
Date: Fri, 2 Jul 2010 02:09:57 +0000
Subject: Always pass unsuspended dm devices through persistent filter to other
 filters. Move test for suspended dm devices ahead of other filters.

---
 lib/filters/filter-persistent.c | 28 +++++++++++++++++++++++-----
 lib/filters/filter.c            | 13 +++++--------
 lib/filters/filter.h            |  1 +
 3 files changed, 29 insertions(+), 13 deletions(-)

(limited to 'lib/filters')

diff --git a/lib/filters/filter-persistent.c b/lib/filters/filter-persistent.c
index 6574d698..5a016f84 100644
--- a/lib/filters/filter-persistent.c
+++ b/lib/filters/filter-persistent.c
@@ -16,9 +16,11 @@
 #include "lib.h"
 #include "config.h"
 #include "dev-cache.h"
+#include "filter.h"
 #include "filter-persistent.h"
 #include "lvm-file.h"
 #include "lvm-string.h"
+#include "activate.h"
 
 #include <sys/stat.h>
 #include <fcntl.h>
@@ -266,15 +268,31 @@ static int _lookup_p(struct dev_filter *f, struct device *dev)
 	void *l = dm_hash_lookup(pf->devices, dev_name(dev));
 	struct str_list *sl;
 
+	/* Cached BAD? */
+	if (l == PF_BAD_DEVICE) {
+		log_debug("%s: Skipping (cached)", dev_name(dev));
+		return 0;
+	}
+
+        /* Test dm devices every time, so cache them as GOOD. */
+	if (MAJOR(dev->dev) == dm_major()) {
+		if (!l)
+			dm_list_iterate_items(sl, &dev->aliases)
+				dm_hash_insert(pf->devices, sl->str, PF_GOOD_DEVICE);
+		if (ignore_suspended_devices() && !device_is_usable(dev)) {
+                	log_debug("%s: Skipping (suspended/internal)", dev_name(dev));
+			return 0;
+		}
+		return pf->real->passes_filter(pf->real, dev);
+	}
+
+	/* Uncached */
 	if (!l) {
-		l = pf->real->passes_filter(pf->real, dev) ?
-		    PF_GOOD_DEVICE : PF_BAD_DEVICE;
+		l = pf->real->passes_filter(pf->real, dev) ?  PF_GOOD_DEVICE : PF_BAD_DEVICE;
 
 		dm_list_iterate_items(sl, &dev->aliases)
 			dm_hash_insert(pf->devices, sl->str, l);
-
-	} else if (l == PF_BAD_DEVICE)
-			log_debug("%s: Skipping (cached)", dev_name(dev));
+	}
 
 	return (l == PF_BAD_DEVICE) ? 0 : 1;
 }
diff --git a/lib/filters/filter.c b/lib/filters/filter.c
index 889cb0db..eafa7260 100644
--- a/lib/filters/filter.c
+++ b/lib/filters/filter.c
@@ -42,6 +42,11 @@ static int _blkext_major = -1;
 static int _drbd_major = -1;
 static int _device_mapper_major = -1;
 
+int dm_major(void)
+{
+	return _device_mapper_major;
+}
+
 int md_major(void)
 {
 	return _md_major;
@@ -130,14 +135,6 @@ static int _passes_lvm_type_device_filter(struct dev_filter *f __attribute((unus
 		return 0;
 	}
 
-	/* FIXME Always check 'layer' regardless of ignore_suspended_devices */
-	/* Skip suspended devices */
-	if (MAJOR(dev->dev) == _device_mapper_major &&
-	    ignore_suspended_devices() && !device_is_usable(dev)) {
-		log_debug("%s: Skipping: Suspended or internal dm device", name);
-		return 0;
-	}
-
 	/* Check it's accessible */
 	if (!dev_open_flags(dev, O_RDONLY, 0, 1)) {
 		log_debug("%s: Skipping: open failed", name);
diff --git a/lib/filters/filter.h b/lib/filters/filter.h
index 4da33252..07611f9e 100644
--- a/lib/filters/filter.h
+++ b/lib/filters/filter.h
@@ -35,6 +35,7 @@ struct dev_filter *lvm_type_filter_create(const char *proc,
 
 void lvm_type_filter_destroy(struct dev_filter *f);
 
+int dm_major(void);
 int md_major(void);
 int blkext_major(void);
 int max_partitions(int major);
-- 
cgit