Added flush_disk to factor out common buffer cache flushing code.
We need to be able to flush the buffer cache for for more than
just when a disk is changed, so we factor out common cache flush code
in check_disk_change() to an internal flush_disk() routine. This
routine will then be used for both disk changes and disk resizes (in a
later patch).
Include the disk name in the text indicating that there are busy
inodes on the device and increase the KERN severity of the message.
Signed-off-by: Andrew Patterson <andrew.patterson@xxxxxx>
---
fs/block_dev.c | 32 +++++++++++++++++++++++++++-----
1 files changed, 27 insertions(+), 5 deletions(-)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index b721955..33650fc 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -853,6 +853,32 @@ struct block_device *open_by_devnum(dev_t dev, unsigned mode)
EXPORT_SYMBOL(open_by_devnum);
/**
+ * flush_disk - invalidates all buffer-cache entries on a disk
+ *
+ * @bdev: struct block device to be flushed
+ *
+ * Invalidates all buffer-cache entries on a disk. It should be called
+ * when a disk has been changed -- either by a media change or online
+ * resize.
+ */
+static void flush_disk(struct block_device *bdev)
+{
+ if (__invalidate_device(bdev)) {
+ char name[BDEVNAME_SIZE] = "";
+
+ if (bdev->bd_disk)
+ disk_name(bdev->bd_disk, 0, name);
+ printk(KERN_WARNING "VFS: busy inodes on changed media or "
+ "resized disk %s\n", name);
+ }
+
+ if (!bdev->bd_disk)
+ return;
+ if (disk_partitionable(bdev->bd_disk))
+ bdev->bd_invalidated = 1;
+}
+
+/**
* check_disk_size_change - checks for disk size change and adjusts
* bdev size.
*
@@ -929,13 +955,9 @@ int check_disk_change(struct block_device *bdev)
if (!bdops->media_changed(bdev->bd_disk))
return 0;
- if (__invalidate_device(bdev))
- printk("VFS: busy inodes on changed media.\n");
-
+ flush_disk(bdev);
if (bdops->revalidate_disk)
bdops->revalidate_disk(bdev->bd_disk);
- if (disk_partitionable(bdev->bd_disk))
- bdev->bd_invalidated = 1;
return 1;
}
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