From: Mike Anderson <andmike@xxxxxxxxxx>
Revalidate zero size path prior to using.
Signed-off-by: Mike Anderson <andmike@xxxxxxxxxx>
---
This patch currently only does a revalidate if the size is zero to reduce
impact to existing configurations.
Visual change to the user is the dmesg will contain revalidate info for
each device.
drivers/md/dm-mpath.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
Index: linux-2.6-patched/drivers/md/dm-mpath.c
===================================================================
--- linux-2.6-patched.orig/drivers/md/dm-mpath.c 2007-01-08 14:35:14.000000000 -0800
+++ linux-2.6-patched/drivers/md/dm-mpath.c 2007-01-08 14:35:37.000000000 -0800
@@ -107,6 +107,27 @@
static void process_queued_ios(struct work_struct *work);
static void trigger_event(struct work_struct *work);
+static void dm_check_dev_size(struct priority_group *pg)
+{
+ struct pgpath *pgpath;
+ struct block_device *bdev;
+ sector_t dev_size;
+
+ if (!pg)
+ return;
+
+ list_for_each_entry(pgpath, &pg->pgpaths, list) {
+ bdev = pgpath->path.dev->bdev;
+ dev_size = bdev->bd_inode->i_size >> SECTOR_SHIFT;
+
+ if (!dev_size) {
+ struct gendisk *gd = bdev->bd_disk;
+ if (gd->fops->revalidate_disk)
+ gd->fops->revalidate_disk(gd);
+ bd_set_size(bdev, (loff_t)get_capacity(gd)<<9);
+ }
+ }
+}
/*-----------------------------------------------
* Allocation routines
@@ -224,6 +245,7 @@
} else {
m->pg_init_required = 0;
m->queue_io = 0;
+ dm_check_dev_size(m->current_pg);
}
}
@@ -1002,6 +1024,8 @@
} else if (!m->pg_init_required)
m->queue_io = 0;
+ dm_check_dev_size(m->current_pg);
+
m->pg_init_in_progress = 0;
queue_work(kmultipathd, &m->process_queued_ios);
spin_unlock_irqrestore(&m->lock, flags);
--
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