50 lines
1.6 KiB
Diff
50 lines
1.6 KiB
Diff
From 19cb7d4e4efe39ef6ec8b216a254d83a1257846c Mon Sep 17 00:00:00 2001
|
|
From: Rusty Bird <rustybird@openmailbox.org>
|
|
Date: Mon, 11 Jul 2016 13:05:38 +0000
|
|
Subject: [PATCH] block: add no_part_scan module parameter
|
|
|
|
Define a boolean module parameter named "no_part_scan" defaulting to N,
|
|
which, if set to Y, always causes the GENHD_FL_NO_PART_SCAN flag to be
|
|
added to subsequently created block devices, thereby disabling the
|
|
kernel's various partition table parsers for them.
|
|
|
|
The parameter's current value can be changed at any time by writing to
|
|
the /sys/module/block/parameters/no_part_scan file.
|
|
---
|
|
block/genhd.c | 12 ++++++++++++
|
|
1 file changed, 12 insertions(+)
|
|
|
|
diff --git a/block/genhd.c b/block/genhd.c
|
|
index 9f42526..85b71f5 100644
|
|
--- a/block/genhd.c
|
|
+++ b/block/genhd.c
|
|
@@ -628,6 +628,15 @@
|
|
WARN_ON(err);
|
|
}
|
|
|
|
+/* copied (not moved) from far down below, to have fewer patch hunks */
|
|
+#undef MODULE_PARAM_PREFIX
|
|
+#define MODULE_PARAM_PREFIX "block."
|
|
+
|
|
+/* partition scanning policy */
|
|
+static bool disk_no_part_scan = 0;
|
|
+module_param_named(no_part_scan, disk_no_part_scan, bool, S_IRUGO|S_IWUSR);
|
|
+MODULE_PARM_DESC(no_part_scan, "When adding block devices, always mark them as not to be scanned for partitions");
|
|
+
|
|
/**
|
|
* __device_add_disk - add disk information to kernel list
|
|
* @parent: parent device for the disk
|
|
@@ -645,6 +654,9 @@
|
|
dev_t devt;
|
|
int retval;
|
|
|
|
+ if (disk_no_part_scan)
|
|
+ disk->flags |= GENHD_FL_NO_PART_SCAN;
|
|
+
|
|
/* minors == 0 indicates to use ext devt from part0 and should
|
|
* be accompanied with EXT_DEVT flag. Make sure all
|
|
* parameters make sense.
|
|
--
|
|
2.5.5
|
|
|