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autofs-5.1.7 - reduce umount EBUSY check delay
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From: Ian Kent <raven@themaw.net>
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Some time ago I had to wait and retry umount() for autofs mounts
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becuase I found EBUSY would be returned for a time after the call
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causing false negative umount returns.
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I think that problem has been resolved but removing the retry is
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probably a little risky.
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But the wait time is quite long at one fifth of a second so reduce
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that to one twentieth of a second and increase the retries to make
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it more resposive.
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Signed-off-by: Ian Kent <raven@themaw.net>
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---
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CHANGELOG | 1 +
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daemon/direct.c | 4 ++--
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daemon/indirect.c | 2 +-
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include/automount.h | 2 +-
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4 files changed, 5 insertions(+), 4 deletions(-)
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diff --git a/CHANGELOG b/CHANGELOG
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index b144f6aa..6419052d 100644
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--- a/CHANGELOG
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+++ b/CHANGELOG
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@@ -23,6 +23,7 @@
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- eliminate count_mounts() from expire_proc_indirect().
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- eliminate some strlen calls in offset handling.
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- don't add offset mounts to mounted mounts table.
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+- reduce umount EBUSY check delay.
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25/01/2021 autofs-5.1.7
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- make bind mounts propagation slave by default.
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diff --git a/daemon/direct.c b/daemon/direct.c
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index fbfebbdd..5c1146a7 100644
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--- a/daemon/direct.c
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+++ b/daemon/direct.c
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@@ -150,7 +150,7 @@ int do_umount_autofs_direct(struct autofs_point *ap, struct mapent *me)
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retries = UMOUNT_RETRIES;
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while ((rv = umount(me->key)) == -1 && retries--) {
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- struct timespec tm = {0, 200000000};
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+ struct timespec tm = {0, 50000000};
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if (errno != EBUSY)
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break;
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nanosleep(&tm, NULL);
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@@ -573,7 +573,7 @@ int umount_autofs_offset(struct autofs_point *ap, struct mapent *me)
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retries = UMOUNT_RETRIES;
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while ((rv = umount(me->key)) == -1 && retries--) {
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- struct timespec tm = {0, 200000000};
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+ struct timespec tm = {0, 50000000};
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if (errno != EBUSY)
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break;
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nanosleep(&tm, NULL);
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diff --git a/daemon/indirect.c b/daemon/indirect.c
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index eddcfff7..9f2ca6a0 100644
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--- a/daemon/indirect.c
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+++ b/daemon/indirect.c
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@@ -265,7 +265,7 @@ int umount_autofs_indirect(struct autofs_point *ap, const char *root)
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retries = UMOUNT_RETRIES;
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while ((rv = umount(mountpoint)) == -1 && retries--) {
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- struct timespec tm = {0, 200000000};
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+ struct timespec tm = {0, 50000000};
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if (errno != EBUSY)
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break;
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nanosleep(&tm, NULL);
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diff --git a/include/automount.h b/include/automount.h
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index 69445b92..fa6f5d63 100644
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--- a/include/automount.h
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+++ b/include/automount.h
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@@ -140,7 +140,7 @@ struct autofs_point;
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#define NULL_MAP_HASHSIZE 64
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#define NEGATIVE_TIMEOUT 10
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#define POSITIVE_TIMEOUT 120
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-#define UMOUNT_RETRIES 8
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+#define UMOUNT_RETRIES 16
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#define EXPIRE_RETRIES 3
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struct mapent_cache {
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