File bug-1150021_03-label-Use-bcache_abort_fd-to-ensure-blocks-are-no-lo.patch of Package lvm2.19494

diff -Nupr a/lib/label/label.c b/lib/label/label.c
--- a/lib/label/label.c	2019-12-23 16:01:02.144729254 +0800
+++ b/lib/label/label.c	2019-12-23 16:01:25.752772110 +0800
@@ -619,6 +619,14 @@ static void _drop_bad_aliases(struct dev
 	}
 }
 
+// Like bcache_invalidate, only it throws any dirty data away if the
+// write fails.
+static void _invalidate_fd(struct bcache *cache, int fd)
+{
+	if (!bcache_invalidate_fd(cache, fd))
+		bcache_abort_fd(cache, fd);
+}
+
 /*
  * Read or reread label/metadata from selected devs.
  *
@@ -730,7 +738,7 @@ static int _scan_list(struct cmd_context
 		 * drop it from bcache.
 		 */
 		if (scan_failed || !is_lvm_device) {
-			bcache_invalidate_fd(scan_bcache, devl->dev->bcache_fd);
+			_invalidate_fd(scan_bcache, devl->dev->bcache_fd);
 			_scan_dev_close(devl->dev);
 		}
 
@@ -935,7 +943,7 @@ int label_scan(struct cmd_context *cmd)
 		 * so this will usually not be true.
 		 */
 		if (_in_bcache(dev)) {
-			bcache_invalidate_fd(scan_bcache, dev->bcache_fd);
+			_invalidate_fd(scan_bcache, dev->bcache_fd);
 			_scan_dev_close(dev);
 		}
 
@@ -1111,7 +1119,7 @@ int label_scan_devs(struct cmd_context *
 
 	dm_list_iterate_items(devl, devs) {
 		if (_in_bcache(devl->dev)) {
-			bcache_invalidate_fd(scan_bcache, devl->dev->bcache_fd);
+			_invalidate_fd(scan_bcache, devl->dev->bcache_fd);
 			_scan_dev_close(devl->dev);
 		}
 	}
@@ -1138,7 +1146,7 @@ int label_scan_devs_rw(struct cmd_contex
 
 	dm_list_iterate_items(devl, devs) {
 		if (_in_bcache(devl->dev)) {
-			bcache_invalidate_fd(scan_bcache, devl->dev->bcache_fd);
+			_invalidate_fd(scan_bcache, devl->dev->bcache_fd);
 			_scan_dev_close(devl->dev);
 		}
 		/*
@@ -1160,7 +1168,7 @@ int label_scan_devs_excl(struct dm_list
 
 	dm_list_iterate_items(devl, devs) {
 		if (_in_bcache(devl->dev)) {
-			bcache_invalidate_fd(scan_bcache, devl->dev->bcache_fd);
+			_invalidate_fd(scan_bcache, devl->dev->bcache_fd);
 			_scan_dev_close(devl->dev);
 		}
 		/*
@@ -1180,7 +1188,7 @@ int label_scan_devs_excl(struct dm_list
 void label_scan_invalidate(struct device *dev)
 {
 	if (_in_bcache(dev)) {
-		bcache_invalidate_fd(scan_bcache, dev->bcache_fd);
+		_invalidate_fd(scan_bcache, dev->bcache_fd);
 		_scan_dev_close(dev);
 	}
 }
@@ -1262,7 +1270,7 @@ int label_read(struct device *dev)
 	dm_list_add(&one_dev, &devl->list);
 
 	if (_in_bcache(dev)) {
-		bcache_invalidate_fd(scan_bcache, dev->bcache_fd);
+		_invalidate_fd(scan_bcache, dev->bcache_fd);
 		_scan_dev_close(dev);
 	}
 
@@ -1304,7 +1312,7 @@ int label_scan_open_excl(struct device *
 	if (_in_bcache(dev) && !(dev->flags & DEV_BCACHE_EXCL)) {
 		/* FIXME: avoid tossing out bcache blocks just to replace fd. */
 		log_debug("Close and reopen excl %s", dev_name(dev));
-		bcache_invalidate_fd(scan_bcache, dev->bcache_fd);
+		_invalidate_fd(scan_bcache, dev->bcache_fd);
 		_scan_dev_close(dev);
 	}
 	dev->flags |= DEV_BCACHE_EXCL;
@@ -1317,7 +1325,7 @@ int label_scan_open_rw(struct device *de
 	if (_in_bcache(dev) && !(dev->flags & DEV_BCACHE_WRITE)) {
 		/* FIXME: avoid tossing out bcache blocks just to replace fd. */
 		log_debug("Close and reopen rw %s", dev_name(dev));
-		bcache_invalidate_fd(scan_bcache, dev->bcache_fd);
+		_invalidate_fd(scan_bcache, dev->bcache_fd);
 		_scan_dev_close(dev);
 	}
 	dev->flags |= DEV_BCACHE_WRITE;
@@ -1365,7 +1373,7 @@ bool dev_write_bytes(struct device *dev,
 	if (_in_bcache(dev) && !(dev->flags & DEV_BCACHE_WRITE)) {
 		/* FIXME: avoid tossing out bcache blocks just to replace fd. */
 		log_debug("Close and reopen to write %s", dev_name(dev));
-		bcache_invalidate_fd(scan_bcache, dev->bcache_fd);
+		_invalidate_fd(scan_bcache, dev->bcache_fd);
 		_scan_dev_close(dev);
 
 		dev->flags |= DEV_BCACHE_WRITE;
@@ -1411,7 +1419,7 @@ bool dev_write_zeros(struct device *dev,
 	if (_in_bcache(dev) && !(dev->flags & DEV_BCACHE_WRITE)) {
 		/* FIXME: avoid tossing out bcache blocks just to replace fd. */
 		log_debug("Close and reopen to write %s", dev_name(dev));
-		bcache_invalidate_fd(scan_bcache, dev->bcache_fd);
+		_invalidate_fd(scan_bcache, dev->bcache_fd);
 		_scan_dev_close(dev);
 
 		dev->flags |= DEV_BCACHE_WRITE;
@@ -1462,7 +1470,7 @@ bool dev_set_bytes(struct device *dev, u
 	if (_in_bcache(dev) && !(dev->flags & DEV_BCACHE_WRITE)) {
 		/* FIXME: avoid tossing out bcache blocks just to replace fd. */
 		log_debug("Close and reopen to write %s", dev_name(dev));
-		bcache_invalidate_fd(scan_bcache, dev->bcache_fd);
+		_invalidate_fd(scan_bcache, dev->bcache_fd);
 		_scan_dev_close(dev);
 		/* goes to label_scan_open() since bcache_fd < 0 */
 	}