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authorhannken <hannken@NetBSD.org>2011-10-14 09:23:28 +0000
committerhannken <hannken@NetBSD.org>2011-10-14 09:23:28 +0000
commit6e75bb0dfb296e532c3571fbc1a833003faf481a (patch)
tree51f5f0ca283056d92e4b486cdbe9478c271243b9 /sys/dev/dm/dm_target_linear.c
parentc8937d29ec57fb2b042e9dea3d3acdecfcbf991f (diff)
Change the vnode locking protocol of VOP_GETATTR() to request at least
a shared lock. Make all calls outside of file systems respect it. The calls from file systems need review. No objections from tech-kern.
Diffstat (limited to 'sys/dev/dm/dm_target_linear.c')
-rw-r--r--sys/dev/dm/dm_target_linear.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/dev/dm/dm_target_linear.c b/sys/dev/dm/dm_target_linear.c
index a9b121f704c..7a03f173fe2 100644
--- a/sys/dev/dm/dm_target_linear.c
+++ b/sys/dev/dm/dm_target_linear.c
@@ -1,4 +1,4 @@
-/* $NetBSD: dm_target_linear.c,v 1.12 2010/12/23 14:58:13 mlelstv Exp $ */
+/* $NetBSD: dm_target_linear.c,v 1.13 2011/10/14 09:23:30 hannken Exp $ */
/*
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -201,7 +201,10 @@ dm_target_linear_deps(dm_table_entry_t * table_en, prop_array_t prop_array)
tlc = table_en->target_config;
- if ((error = VOP_GETATTR(tlc->pdev->pdev_vnode, &va, curlwp->l_cred)) != 0)
+ vn_lock(tlc->pdev->pdev_vnode, LK_SHARED | LK_RETRY);
+ error = VOP_GETATTR(tlc->pdev->pdev_vnode, &va, curlwp->l_cred);
+ VOP_UNLOCK(tlc->pdev->pdev_vnode);
+ if (error != 0)
return error;
prop_array_add_uint64(prop_array, (uint64_t) va.va_rdev);