autofs/autofs-5.1.7-add-tree_mapent_cleanup_offsets.patch

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autofs-5.1.7 - add tree_mapent_cleanup_offsets()
From: Ian Kent <raven@themaw.net>
Add function tree_mapent_cleanup_offsets() to the mapent tree handling
implementation.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1 +
include/mounts.h | 1 +
lib/mounts.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 47 insertions(+)
diff --git a/CHANGELOG b/CHANGELOG
index e2fd532c..89d4cfa0 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -37,6 +37,7 @@
- add tree_mapent_delete_offsets().
- add tree_mapent_traverse_subtree().
- fix mount_fullpath().
+- add tree_mapent_cleanup_offsets().
25/01/2021 autofs-5.1.7
- make bind mounts propagation slave by default.
diff --git a/include/mounts.h b/include/mounts.h
index b5a1193b..5441ee0e 100644
--- a/include/mounts.h
+++ b/include/mounts.h
@@ -171,6 +171,7 @@ void mnts_set_mounted_mount(struct autofs_point *ap, const char *name, unsigned
struct tree_node *tree_mapent_root(struct mapent *me);
int tree_mapent_add_node(struct mapent_cache *mc, const char *base, const char *key);
int tree_mapent_delete_offsets(struct mapent_cache *mc, const char *key);
+void tree_mapent_cleanup_offsets(struct mapent *oe);
int unlink_mount_tree(struct autofs_point *ap, const char *mp);
void free_mnt_list(struct mnt_list *list);
int is_mounted(const char *mp, unsigned int type);
diff --git a/lib/mounts.c b/lib/mounts.c
index 497c28c9..ba573b9a 100644
--- a/lib/mounts.c
+++ b/lib/mounts.c
@@ -1647,6 +1647,51 @@ int tree_mapent_delete_offsets(struct mapent_cache *mc, const char *key)
return 1;
}
+static void tree_mapent_umount_mount(struct autofs_point *ap, const char *mp)
+{
+ if (is_mounted(mp, MNTS_ALL)) {
+ if (umount(mp)) {
+ error(ap->logopt, "error recovering from mount fail");
+ error(ap->logopt, "cannot umount %s", mp);
+ }
+ }
+}
+
+static int tree_mapent_cleanup_offsets_work(struct tree_node *n, void *ptr)
+{
+ struct mapent *oe = MAPENT(n);
+ struct traverse_subtree_context *ctxt = ptr;
+
+ tree_mapent_umount_mount(ctxt->ap, oe->key);
+
+ return 1;
+}
+
+void tree_mapent_cleanup_offsets(struct mapent *oe)
+{
+ struct tree_node *base = MAPENT_NODE(oe);
+ struct traverse_subtree_context ctxt = {
+ .ap = oe->mc->ap,
+ .base = base,
+ .strict = 0,
+ };
+ struct autofs_point *ap = oe->mc->ap;
+
+ tree_mapent_traverse_subtree(base, tree_mapent_cleanup_offsets_work, &ctxt);
+
+ /* Cleanup base mount after offsets have been cleaned up */
+ if (*oe->key == '/')
+ tree_mapent_umount_mount(ap, oe->key);
+ else {
+ char mp[PATH_MAX + 1];
+
+ if (!mount_fullpath(mp, PATH_MAX, ap->path, oe->key))
+ error(ap->logopt, "mount path is too long");
+ else
+ tree_mapent_umount_mount(ap, mp);
+ }
+}
+
/* From glibc decode_name() */
/* Since the values in a line are separated by spaces, a name cannot
* contain a space. Therefore some programs encode spaces in names