40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
am-utils-6.2 - fix Linux NFS recognition of umounts
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From: Ian Kent <raven@themaw.net>
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Recent Linux NFS uses a simulated attibute cache change detection
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method based on ctime. Consequenty the amd use of mtime for this
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doesn't work properly for some kernel versions.
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The problem seen with some kernel versions is a failure to recognize
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umounts.
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Updating the parent ctime in step with mtime during umount appears
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to fix the problem.
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Signed-off-by: Ian Kent <raven@themaw.net>
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---
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amd/autil.c | 7 +++++--
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1 file changed, 5 insertions(+), 2 deletions(-)
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diff --git a/amd/autil.c b/amd/autil.c
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index cd9514d..efd18ef 100644
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--- a/amd/autil.c
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+++ b/amd/autil.c
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@@ -709,10 +709,13 @@ am_unmounted(am_node *mp)
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--mp->am_parent->am_fattr.na_nlink;
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/*
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- * Update mtime of parent node
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+ * Update mtime and ctime of parent node (as ctime is needed for some
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+ * Linux NFS kernel versions to properly recognize attribute changes).
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*/
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- if (mp->am_parent && mp->am_parent->am_al->al_mnt)
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+ if (mp->am_parent && mp->am_parent->am_al->al_mnt) {
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clocktime(&mp->am_parent->am_fattr.na_mtime);
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+ mp->am_parent->am_fattr.na_ctime = mp->am_parent->am_fattr.na_mtime;
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+ }
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if (mp->am_parent && (mp->am_flags & AMF_REMOUNT)) {
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char *fname = xstrdup(mp->am_name);
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