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authorAndrew Yourtchenko <ayourtch@gmail.com>2018-08-28 22:37:47 +0200
committerDave Barach <openvpp@barachs.net>2018-09-03 17:31:39 +0000
commitd5c70d556283794b3d63808879c7230b5eebaf95 (patch)
treeaca6d2d3361bd80e41a8693379bfcadd15d6fc8c /src/plugins/acl/hash_lookup.c
parent4dffd1c9988020619caff9b8d3b350e7f79e0398 (diff)
acl-plugin: fix the memory leak with colliding entries storage
Change-Id: I634971f6376a7ea49de718ade9139e67eeed48e5 Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com> (cherry picked from commit d039281e11cfc4580fe140e72390c1c48688c722)
Diffstat (limited to 'src/plugins/acl/hash_lookup.c')
-rw-r--r--src/plugins/acl/hash_lookup.c77
1 files changed, 73 insertions, 4 deletions
diff --git a/src/plugins/acl/hash_lookup.c b/src/plugins/acl/hash_lookup.c
index c8941148036..f16f7b2fd59 100644
--- a/src/plugins/acl/hash_lookup.c
+++ b/src/plugins/acl/hash_lookup.c
@@ -464,24 +464,46 @@ static void
vec_del_collision_rule (collision_match_rule_t ** pvec,
u32 applied_entry_index)
{
- u32 i;
- for (i = 0; i < vec_len ((*pvec)); i++)
+ u32 i = 0;
+ u32 deleted = 0;
+ while (i < _vec_len ((*pvec)))
{
collision_match_rule_t *cr = vec_elt_at_index ((*pvec), i);
if (cr->applied_entry_index == applied_entry_index)
{
- vec_del1 ((*pvec), i);
+ /* vec_del1 ((*pvec), i) would be more efficient but would reorder the elements. */
+ vec_delete((*pvec), 1, i);
+ deleted++;
+ DBG0("vec_del_collision_rule deleting one at index %d", i);
+ }
+ else
+ {
+ i++;
}
}
+ ASSERT(deleted > 0);
}
static void
+acl_plugin_print_pae (vlib_main_t * vm, int j, applied_hash_ace_entry_t * pae);
+
+static void
del_colliding_rule (applied_hash_ace_entry_t ** applied_hash_aces,
u32 head_index, u32 applied_entry_index)
{
+ DBG0("DEL COLLIDING RULE: head_index %d applied index %d", head_index, applied_entry_index);
+
+
applied_hash_ace_entry_t *head_pae =
vec_elt_at_index ((*applied_hash_aces), head_index);
+ if (ACL_HASH_LOOKUP_DEBUG > 0)
+ acl_plugin_print_pae(acl_main.vlib_main, head_index, head_pae);
vec_del_collision_rule (&head_pae->colliding_rules, applied_entry_index);
+ if (vec_len(head_pae->colliding_rules) == 0) {
+ vec_free(head_pae->colliding_rules);
+ }
+ if (ACL_HASH_LOOKUP_DEBUG > 0)
+ acl_plugin_print_pae(acl_main.vlib_main, head_index, head_pae);
}
static void
@@ -493,6 +515,9 @@ add_colliding_rule (acl_main_t * am,
vec_elt_at_index ((*applied_hash_aces), head_index);
applied_hash_ace_entry_t *pae =
vec_elt_at_index ((*applied_hash_aces), applied_entry_index);
+ DBG0("ADD COLLIDING RULE: head_index %d applied index %d", head_index, applied_entry_index);
+ if (ACL_HASH_LOOKUP_DEBUG > 0)
+ acl_plugin_print_pae(acl_main.vlib_main, head_index, head_pae);
collision_match_rule_t cr;
@@ -502,6 +527,8 @@ add_colliding_rule (acl_main_t * am,
cr.applied_entry_index = applied_entry_index;
cr.rule = am->acls[pae->acl_index].rules[pae->ace_index];
vec_add1 (head_pae->colliding_rules, cr);
+ if (ACL_HASH_LOOKUP_DEBUG > 0)
+ acl_plugin_print_pae(acl_main.vlib_main, head_index, head_pae);
}
static u32
@@ -754,6 +781,17 @@ move_applied_ace_hash_entry(acl_main_t *am,
/* update the linkage and hash table if necessary */
applied_hash_ace_entry_t *pae = vec_elt_at_index((*applied_hash_aces), old_index);
+ applied_hash_ace_entry_t *new_pae = vec_elt_at_index((*applied_hash_aces), new_index);
+
+ if (ACL_HASH_LOOKUP_DEBUG > 0) {
+ clib_warning("Moving pae from %d to %d", old_index, new_index);
+ acl_plugin_print_pae(am->vlib_main, old_index, pae);
+ }
+
+ if (new_pae->tail_applied_entry_index == old_index) {
+ /* fix-up the tail index if we are the tail and the start */
+ new_pae->tail_applied_entry_index = new_index;
+ }
if (pae->prev_applied_entry_index != ~0) {
applied_hash_ace_entry_t *prev_pae = vec_elt_at_index((*applied_hash_aces), pae->prev_applied_entry_index);
@@ -780,10 +818,35 @@ move_applied_ace_hash_entry(acl_main_t *am,
ASSERT(head_pae->tail_applied_entry_index == old_index);
head_pae->tail_applied_entry_index = new_index;
}
+ if (new_pae->colliding_rules) {
+ /* update the information within the collision rule entry */
+ ASSERT(vec_len(new_pae->colliding_rules) > 0);
+ collision_match_rule_t *cr = vec_elt_at_index (new_pae->colliding_rules, 0);
+ ASSERT(cr->applied_entry_index == old_index);
+ cr->applied_entry_index = new_index;
+ } else {
+ /* find the index in the collision rule entry on the head element */
+ u32 head_index = find_head_applied_ace_index(applied_hash_aces, new_index);
+ ASSERT(head_index != ~0);
+ applied_hash_ace_entry_t *head_pae = vec_elt_at_index((*applied_hash_aces), head_index);
+ ASSERT(vec_len(head_pae->colliding_rules) > 0);
+ u32 i;
+ for (i=0; i<vec_len(head_pae->colliding_rules); i++) {
+ collision_match_rule_t *cr = vec_elt_at_index (head_pae->colliding_rules, i);
+ if (cr->applied_entry_index == old_index) {
+ cr->applied_entry_index = new_index;
+ }
+ }
+ if (ACL_HASH_LOOKUP_DEBUG > 0) {
+ clib_warning("Head pae at index %d after adjustment", head_index);
+ acl_plugin_print_pae(am->vlib_main, head_index, head_pae);
+ }
+ }
/* invalidate the old entry */
pae->prev_applied_entry_index = ~0;
pae->next_applied_entry_index = ~0;
pae->tail_applied_entry_index = ~0;
+ pae->colliding_rules = NULL;
}
static void
@@ -816,13 +879,14 @@ deactivate_applied_ace_hash_entry(acl_main_t *am,
}
} else {
/* It was the first entry. We need either to reset the hash entry or delete it */
+ /* delete our entry from the collision vector first */
+ del_colliding_rule(applied_hash_aces, old_index, old_index);
if (pae->next_applied_entry_index != ~0) {
/* the next element becomes the new first one, so needs the tail pointer to be set */
applied_hash_ace_entry_t *next_pae = vec_elt_at_index((*applied_hash_aces), pae->next_applied_entry_index);
ASSERT(pae->tail_applied_entry_index != ~0);
next_pae->tail_applied_entry_index = pae->tail_applied_entry_index;
/* Remove ourselves and transfer the ownership of the colliding rules vector */
- del_colliding_rule(applied_hash_aces, old_index, old_index);
next_pae->colliding_rules = pae->colliding_rules;
/* unlink from the next element */
next_pae->prev_applied_entry_index = ~0;
@@ -910,6 +974,10 @@ hash_acl_unapply(acl_main_t *am, u32 lc_index, int acl_index)
remake_hash_applied_mask_info_vec(am, applied_hash_aces, lc_index);
+ if (vec_len((*applied_hash_aces)) == 0) {
+ vec_free((*applied_hash_aces));
+ }
+
clib_mem_set_heap (oldheap);
}
@@ -1128,6 +1196,7 @@ void hash_acl_delete(acl_main_t *am, int acl_index)
}
vec_free(lc_list_copy);
}
+ vec_free(ha->lc_index_list);
/* walk the mask types for the ACL about-to-be-deleted, and decrease
* the reference count, possibly freeing up some of them */