Mailing List Archive

Today hashtable_insert() returns 0 in case of an error. Change that to
let it return an errno value in the error case and 0 in case of success.

Even if not used today, do the same switch for the return value of
hashtable_expand().

Signed-off-by: Juergen Gross <jgross@suse.com>
---
tools/xenstore/hashtable.c | 15 ++++++++++-----
tools/xenstore/hashtable.h | 2 +-
tools/xenstore/xenstored_core.c | 4 ++--
tools/xenstore/xenstored_domain.c | 4 ++--
tools/xenstore/xenstored_transaction.c | 4 ++--
5 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/tools/xenstore/hashtable.c b/tools/xenstore/hashtable.c
index ab1e687d0b..084d562b22 100644
--- a/tools/xenstore/hashtable.c
+++ b/tools/xenstore/hashtable.c
@@ -105,14 +105,15 @@ static int hashtable_expand(struct hashtable *h)
struct entry **pE;
unsigned int newsize, i, index;
/* Check we're not hitting max capacity */
- if (h->primeindex == (PRIME_TABLE_LEN - 1)) return 0;
+ if (h->primeindex == (PRIME_TABLE_LEN - 1))
+ return ENOSPC;
newsize = primes[++(h->primeindex)];

newtable = talloc_realloc(h, h->table, struct entry *, newsize);
if (!newtable)
{
h->primeindex--;
- return 0;
+ return ENOMEM;
}

h->table = newtable;
@@ -136,7 +137,7 @@ static int hashtable_expand(struct hashtable *h)

h->tablelength = newsize;
h->loadlimit = loadlimit(h->primeindex);
- return -1;
+ return 0;
}

int hashtable_insert(struct hashtable *h, void *k, void *v)
@@ -153,7 +154,11 @@ int hashtable_insert(struct hashtable *h, void *k, void *v)
hashtable_expand(h);
}
e = talloc_zero(h, struct entry);
- if (NULL == e) { --(h->entrycount); return 0; } /*oom*/
+ if (NULL == e)
+ {
+ --h->entrycount;
+ return ENOMEM;
+ }
e->h = hash(h,k);
index = indexFor(h->tablelength,e->h);
e->k = k;
@@ -164,7 +169,7 @@ int hashtable_insert(struct hashtable *h, void *k, void *v)
talloc_steal(e, v);
e->next = h->table[index];
h->table[index] = e;
- return -1;
+ return 0;
}

void *hashtable_search(const struct hashtable *h, const void *k)
diff --git a/tools/xenstore/hashtable.h b/tools/xenstore/hashtable.h
index 0e1a6f61c2..ee4e25cbbf 100644
--- a/tools/xenstore/hashtable.h
+++ b/tools/xenstore/hashtable.h
@@ -36,7 +36,7 @@ create_hashtable(const void *ctx, const char *name,
* @param h the hashtable to insert into
* @param k the key - hashtable claims ownership and will free on removal
* @param v the value - does not claim ownership
- * @return non-zero for successful insertion
+ * @return zero for successful insertion
*
* This function will cause the table to expand if the insertion would take
* the ratio of entries to table size over the maximum load factor.
diff --git a/tools/xenstore/xenstored_core.c b/tools/xenstore/xenstored_core.c
index 6ce7be3161..c5433e5b3f 100644
--- a/tools/xenstore/xenstored_core.c
+++ b/tools/xenstore/xenstored_core.c
@@ -2394,7 +2394,7 @@ int remember_string(struct hashtable *hash, const char *str)
char *k = talloc_strdup(NULL, str);

if (!k)
- return 0;
+ return ENOMEM;
return hashtable_insert(hash, k, (void *)1);
}

@@ -2428,7 +2428,7 @@ static int check_store_step(const void *ctx, struct connection *conn,
: WALK_TREE_SKIP_CHILDREN;
}

- if (!remember_string(data->reachable, node->name))
+ if (remember_string(data->reachable, node->name))
return WALK_TREE_ERROR_STOP;

domain_check_acc_add(node, data->domains);
diff --git a/tools/xenstore/xenstored_domain.c b/tools/xenstore/xenstored_domain.c
index 6d40aefc63..be9175a461 100644
--- a/tools/xenstore/xenstored_domain.c
+++ b/tools/xenstore/xenstored_domain.c
@@ -540,7 +540,7 @@ static struct domain *alloc_domain(const void *context, unsigned int domid)
domain->generation = generation;
domain->introduced = false;

- if (!hashtable_insert(domhash, &domain->domid, domain)) {
+ if (hashtable_insert(domhash, &domain->domid, domain)) {
talloc_free(domain);
errno = ENOMEM;
return NULL;
@@ -1792,7 +1792,7 @@ static int domain_check_acc_init_sub(const void *k, void *v, void *arg)
*/
dom->nodes = -d->acc[ACC_NODES].val;

- if (!hashtable_insert(domains, &dom->domid, dom)) {
+ if (hashtable_insert(domains, &dom->domid, dom)) {
talloc_free(dom);
return -1;
}
diff --git a/tools/xenstore/xenstored_transaction.c b/tools/xenstore/xenstored_transaction.c
index e8968d7a1d..c615c0de13 100644
--- a/tools/xenstore/xenstored_transaction.c
+++ b/tools/xenstore/xenstored_transaction.c
@@ -600,13 +600,13 @@ int check_transactions(struct hashtable *hash)
list_for_each_entry(trans, &conn->transaction_list, list) {
tname = talloc_asprintf(trans, "%"PRIu64,
trans->generation);
- if (!tname || !remember_string(hash, tname))
+ if (!tname || remember_string(hash, tname))
goto nomem;

list_for_each_entry(i, &trans->accessed, list) {
if (!i->ta_node)
continue;
- if (!remember_string(hash, i->trans_name))
+ if (remember_string(hash, i->trans_name))
goto nomem;
}

--
2.35.3