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autofs-5.0.7 - fix null map entry order handling
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From: Ian Kent <ikent@redhat.com>
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If a null map entry appears after a corresponding indirect map entry
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autofs doesn't handle it properly.
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Since it appears after the map entry it should'nt affect it but autofs
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doesn't account for this case and assumes the map entry is already
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mounted and tries to shut it down causing attempted access to facilities
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that don't exist.
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---
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CHANGELOG | 1 +
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lib/master.c | 32 +++++++++++++++++++++++++++++---
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2 files changed, 30 insertions(+), 3 deletions(-)
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diff --git a/CHANGELOG b/CHANGELOG
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index 7b8d185..79cf673 100644
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--- a/CHANGELOG
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+++ b/CHANGELOG
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@@ -7,6 +7,7 @@
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- fix typo in automount(8).
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- dont wait forever to restart.
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- add timeout option description to man page.
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+- fix null map entry order handling.
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25/07/2012 autofs-5.0.7
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=======================
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diff --git a/lib/master.c b/lib/master.c
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index 904b13d..a0e62f2 100644
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--- a/lib/master.c
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+++ b/lib/master.c
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@@ -1179,9 +1179,35 @@ int master_mount_mounts(struct master *master, time_t age, int readall)
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cache_readlock(nc);
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ne = cache_lookup_distinct(nc, this->path);
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- if (ne && this->age > ne->age) {
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+ /*
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+ * If this path matched a nulled entry the master map entry
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+ * must be an indirect mount so the master map entry line
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+ * number may be obtained from this->maps.
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+ */
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+ if (ne) {
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+ int lineno = ne->age;
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cache_unlock(nc);
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- st_add_task(ap, ST_SHUTDOWN_PENDING);
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+
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+ /* null entry appears after map entry */
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+ if (this->maps->master_line < lineno) {
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+ warn(ap->logopt,
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+ "ignoring null entry that appears after "
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+ "existing entry for %s", this->path);
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+ goto cont;
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+ }
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+ if (ap->state != ST_INIT) {
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+ st_add_task(ap, ST_SHUTDOWN_PENDING);
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+ continue;
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+ }
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+ /*
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+ * The map entry hasn't been started yet and we've
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+ * seen a preceeding null map entry for it so just
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+ * delete it from the master map entry list so it
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+ * doesn't get in the road.
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+ */
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+ list_del_init(&this->list);
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+ master_free_mapent_sources(ap->entry, 1);
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+ master_free_mapent(ap->entry);
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continue;
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}
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nested = cache_partial_match(nc, this->path);
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@@ -1194,7 +1220,7 @@ int master_mount_mounts(struct master *master, time_t age, int readall)
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cache_delete(nc, nested->key);
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}
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cache_unlock(nc);
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-
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+cont:
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st_mutex_lock();
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state_pipe = this->ap->state_pipe[1];
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