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autofs/SOURCES/autofs-5.1.7-refactor-umoun...

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autofs-5.1.7 - refactor umount_multi_triggers()
From: Ian Kent <raven@themaw.net>
Refactor umount_multi_triggers() to try the umount of an offset subtree
in a seperate function.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1
lib/mounts.c | 187 ++++++++++++++++++++++++++++++++---------------------------
2 files changed, 104 insertions(+), 84 deletions(-)
--- autofs-5.1.4.orig/CHANGELOG
+++ autofs-5.1.4/CHANGELOG
@@ -10,6 +10,7 @@
- set offset parent in update_offset_entry().
- remove redundant variables from mount_autofs_offset().
- remove unused parameter form do_mount_autofs_offset().
+- refactor umount_multi_triggers().
xx/xx/2018 autofs-5.1.5
- fix flag file permission.
--- autofs-5.1.4.orig/lib/mounts.c
+++ autofs-5.1.4/lib/mounts.c
@@ -2490,57 +2490,6 @@ static int do_mount_autofs_offset(struct
return mounted;
}
-int mount_multi_triggers(struct autofs_point *ap, struct mapent *me,
- const char *root, unsigned int start, const char *base)
-{
- char path[PATH_MAX + 1];
- char *offset = path;
- struct mapent *oe;
- struct list_head *pos = NULL;
- unsigned int root_len = strlen(root);
- int mounted;
-
- mounted = 0;
- offset = cache_get_offset(base, offset, start, &me->multi_list, &pos);
- while (offset) {
- char key[PATH_MAX + 1];
- int key_len = root_len + strlen(offset);
-
- if (key_len > PATH_MAX) {
- warn(ap->logopt, "path loo long");
- goto cont;
- }
-
- /* The root offset is always mounted seperately so the
- * offset path will always be root + offset.
- */
- strcpy(key, root);
- strcat(key, offset);
-
- oe = cache_lookup_distinct(me->mc, key);
- if (!oe || !oe->mapent)
- goto cont;
-
- mounted += do_mount_autofs_offset(ap, oe, root);
-
- /*
- * If re-constructing a multi-mount it's necessary to walk
- * into nested mounts, unlike the usual "mount only what's
- * needed as you go" behavior.
- */
- if (ap->state == ST_READMAP && ap->flags & MOUNT_FLAG_REMOUNT) {
- if (oe->ioctlfd != -1 ||
- is_mounted(oe->key, MNTS_REAL))
- mount_multi_triggers(ap, oe, key, strlen(key), base);
- }
-cont:
- offset = cache_get_offset(base,
- offset, start, &me->multi_list, &pos);
- }
-
- return mounted;
-}
-
static int rmdir_path_offset(struct autofs_point *ap, struct mapent *oe)
{
char *dir, *path;
@@ -2576,7 +2525,10 @@ static int rmdir_path_offset(struct auto
return ret;
}
-int umount_multi_triggers(struct autofs_point *ap, struct mapent *me, char *root, const char *base)
+static int do_umount_offset(struct autofs_point *ap, struct mapent *oe, const char *root);
+
+static int do_umount_multi_triggers(struct autofs_point *ap,
+ struct mapent *me, const char *root, const char *base)
{
char path[PATH_MAX + 1];
char *offset;
@@ -2606,7 +2558,6 @@ int umount_multi_triggers(struct autofs_
while ((offset = cache_get_offset(mm_base, offset, start, mm_root, &pos))) {
char key[PATH_MAX + 1];
int key_len = root_len + strlen(offset);
- char *oe_base;
if (mm_base_len > 1)
key_len += mm_base_len;
@@ -2626,47 +2577,116 @@ int umount_multi_triggers(struct autofs_
if (!oe || (strlen(oe->key) - start) == 1)
continue;
+ left += do_umount_offset(ap, oe, root);
+ }
+
+ return left;
+}
+
+static int do_umount_offset(struct autofs_point *ap, struct mapent *oe, const char *root)
+{
+ char *oe_base;
+ int left = 0;
+
+ /*
+ * Check for and umount subtree offsets resulting from
+ * nonstrict mount fail.
+ */
+ oe_base = oe->key + strlen(root);
+ left += do_umount_multi_triggers(ap, oe, root, oe_base);
+
+ if (oe->ioctlfd != -1 ||
+ is_mounted(oe->key, MNTS_REAL)) {
+ left++;
+ return left;
+ }
+
+ debug(ap->logopt, "umount offset %s", oe->key);
+
+ if (umount_autofs_offset(ap, oe)) {
+ warn(ap->logopt, "failed to umount offset");
+ left++;
+ } else {
+ struct stat st;
+ int ret;
+
+ if (!(oe->flags & MOUNT_FLAG_DIR_CREATED))
+ return left;
+
/*
- * Check for and umount subtree offsets resulting from
- * nonstrict mount fail.
+ * An error due to partial directory removal is
+ * ok so only try and remount the offset if the
+ * actual mount point still exists.
*/
- oe_base = oe->key + strlen(root);
- left += umount_multi_triggers(ap, oe, root, oe_base);
+ ret = rmdir_path_offset(ap, oe);
+ if (ret == -1 && !stat(oe->key, &st)) {
+ ret = do_mount_autofs_offset(ap, oe, root);
+ if (ret)
+ left++;
+ /* But we did origianlly create this */
+ oe->flags |= MOUNT_FLAG_DIR_CREATED;
+ }
+ }
+ return left;
+}
- if (oe->ioctlfd != -1 ||
- is_mounted(oe->key, MNTS_REAL)) {
- left++;
- continue;
+int mount_multi_triggers(struct autofs_point *ap, struct mapent *me,
+ const char *root, unsigned int start, const char *base)
+{
+ char path[PATH_MAX + 1];
+ char *offset = path;
+ struct mapent *oe;
+ struct list_head *pos = NULL;
+ unsigned int root_len = strlen(root);
+ int mounted;
+
+ mounted = 0;
+ offset = cache_get_offset(base, offset, start, &me->multi_list, &pos);
+ while (offset) {
+ char key[PATH_MAX + 1];
+ int key_len = root_len + strlen(offset);
+
+ if (key_len > PATH_MAX) {
+ warn(ap->logopt, "path loo long");
+ goto cont;
}
- debug(ap->logopt, "umount offset %s", oe->key);
+ /* The root offset is always mounted seperately so the
+ * offset path will always be root + offset.
+ */
+ strcpy(key, root);
+ strcat(key, offset);
- if (umount_autofs_offset(ap, oe)) {
- warn(ap->logopt, "failed to umount offset");
- left++;
- } else {
- struct stat st;
- int ret;
+ oe = cache_lookup_distinct(me->mc, key);
+ if (!oe || !oe->mapent)
+ goto cont;
- if (!(oe->flags & MOUNT_FLAG_DIR_CREATED))
- continue;
+ mounted += do_mount_autofs_offset(ap, oe, root);
- /*
- * An error due to partial directory removal is
- * ok so only try and remount the offset if the
- * actual mount point still exists.
- */
- ret = rmdir_path_offset(ap, oe);
- if (ret == -1 && !stat(oe->key, &st)) {
- ret = do_mount_autofs_offset(ap, oe, root);
- if (ret)
- left++;
- /* But we did origianlly create this */
- oe->flags |= MOUNT_FLAG_DIR_CREATED;
- }
+ /*
+ * If re-constructing a multi-mount it's necessary to walk
+ * into nested mounts, unlike the usual "mount only what's
+ * needed as you go" behavior.
+ */
+ if (ap->state == ST_READMAP && ap->flags & MOUNT_FLAG_REMOUNT) {
+ if (oe->ioctlfd != -1 ||
+ is_mounted(oe->key, MNTS_REAL))
+ mount_multi_triggers(ap, oe, key, strlen(key), base);
}
+cont:
+ offset = cache_get_offset(base,
+ offset, start, &me->multi_list, &pos);
}
+ return mounted;
+}
+
+int umount_multi_triggers(struct autofs_point *ap, struct mapent *me, char *root, const char *base)
+{
+ int left;
+
+ left = do_umount_multi_triggers(ap, me, root, base);
+
if (!left && me->multi == me) {
struct mapent_cache *mc = me->mc;
int status;
@@ -2865,4 +2885,3 @@ int clean_stale_multi_triggers(struct au
return left;
}
-
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