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-rw-r--r--fs/ubifs/gc.c82
1 files changed, 61 insertions, 21 deletions
diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c
index 918d1582ca05..151f10882820 100644
--- a/fs/ubifs/gc.c
+++ b/fs/ubifs/gc.c
@@ -125,10 +125,16 @@ int data_nodes_cmp(void *priv, struct list_head *a, struct list_head *b)
struct ubifs_scan_node *sa, *sb;
cond_resched();
+ if (a == b)
+ return 0;
+
sa = list_entry(a, struct ubifs_scan_node, list);
sb = list_entry(b, struct ubifs_scan_node, list);
+
ubifs_assert(key_type(c, &sa->key) == UBIFS_DATA_KEY);
ubifs_assert(key_type(c, &sb->key) == UBIFS_DATA_KEY);
+ ubifs_assert(sa->type == UBIFS_DATA_NODE);
+ ubifs_assert(sb->type == UBIFS_DATA_NODE);
inuma = key_inum(c, &sa->key);
inumb = key_inum(c, &sb->key);
@@ -157,28 +163,40 @@ int data_nodes_cmp(void *priv, struct list_head *a, struct list_head *b)
*/
int nondata_nodes_cmp(void *priv, struct list_head *a, struct list_head *b)
{
- int typea, typeb;
ino_t inuma, inumb;
struct ubifs_info *c = priv;
struct ubifs_scan_node *sa, *sb;
cond_resched();
+ if (a == b)
+ return 0;
+
sa = list_entry(a, struct ubifs_scan_node, list);
sb = list_entry(b, struct ubifs_scan_node, list);
- typea = key_type(c, &sa->key);
- typeb = key_type(c, &sb->key);
- ubifs_assert(typea != UBIFS_DATA_KEY && typeb != UBIFS_DATA_KEY);
+
+ ubifs_assert(key_type(c, &sa->key) != UBIFS_DATA_KEY &&
+ key_type(c, &sb->key) != UBIFS_DATA_KEY);
+ ubifs_assert(sa->type != UBIFS_DATA_NODE &&
+ sb->type != UBIFS_DATA_NODE);
/* Inodes go before directory entries */
- if (typea == UBIFS_INO_KEY) {
- if (typeb == UBIFS_INO_KEY)
+ if (sa->type == UBIFS_INO_NODE) {
+ if (sb->type == UBIFS_INO_NODE)
return sb->len - sa->len;
return -1;
}
- if (typeb == UBIFS_INO_KEY)
+ if (sb->type == UBIFS_INO_NODE)
return 1;
- ubifs_assert(typea == UBIFS_DENT_KEY && typeb == UBIFS_DENT_KEY);
+ ubifs_assert(key_type(c, &sa->key) == UBIFS_DENT_KEY ||
+ key_type(c, &sa->key) == UBIFS_XENT_KEY);
+ ubifs_assert(key_type(c, &sb->key) == UBIFS_DENT_KEY ||
+ key_type(c, &sb->key) == UBIFS_XENT_KEY);
+ ubifs_assert(sa->type == UBIFS_DENT_NODE ||
+ sa->type == UBIFS_XENT_NODE);
+ ubifs_assert(sb->type == UBIFS_DENT_NODE ||
+ sb->type == UBIFS_XENT_NODE);
+
inuma = key_inum(c, &sa->key);
inumb = key_inum(c, &sb->key);
@@ -224,17 +242,33 @@ int nondata_nodes_cmp(void *priv, struct list_head *a, struct list_head *b)
static int sort_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
struct list_head *nondata, int *min)
{
+ int err;
struct ubifs_scan_node *snod, *tmp;
*min = INT_MAX;
/* Separate data nodes and non-data nodes */
list_for_each_entry_safe(snod, tmp, &sleb->nodes, list) {
- int err;
+ ubifs_assert(snod->type == UBIFS_INO_NODE ||
+ snod->type == UBIFS_DATA_NODE ||
+ snod->type == UBIFS_DENT_NODE ||
+ snod->type == UBIFS_XENT_NODE ||
+ snod->type == UBIFS_TRUN_NODE);
+
+ if (snod->type != UBIFS_INO_NODE &&
+ snod->type != UBIFS_DATA_NODE &&
+ snod->type != UBIFS_DENT_NODE &&
+ snod->type != UBIFS_XENT_NODE) {
+ /* Probably truncation node, zap it */
+ list_del(&snod->list);
+ kfree(snod);
+ continue;
+ }
- ubifs_assert(snod->type != UBIFS_IDX_NODE);
- ubifs_assert(snod->type != UBIFS_REF_NODE);
- ubifs_assert(snod->type != UBIFS_CS_NODE);
+ ubifs_assert(key_type(c, &snod->key) == UBIFS_DATA_KEY ||
+ key_type(c, &snod->key) == UBIFS_INO_KEY ||
+ key_type(c, &snod->key) == UBIFS_DENT_KEY ||
+ key_type(c, &snod->key) == UBIFS_XENT_KEY);
err = ubifs_tnc_has_node(c, &snod->key, 0, sleb->lnum,
snod->offs, 0);
@@ -258,6 +292,13 @@ static int sort_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
/* Sort data and non-data nodes */
list_sort(c, &sleb->nodes, &data_nodes_cmp);
list_sort(c, nondata, &nondata_nodes_cmp);
+
+ err = dbg_check_data_nodes_order(c, &sleb->nodes);
+ if (err)
+ return err;
+ err = dbg_check_nondata_nodes_order(c, nondata);
+ if (err)
+ return err;
return 0;
}
@@ -575,13 +616,14 @@ int ubifs_garbage_collect(struct ubifs_info *c, int anyway)
struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf;
ubifs_assert_cmt_locked(c);
+ ubifs_assert(!c->ro_media && !c->ro_mount);
if (ubifs_gc_should_commit(c))
return -EAGAIN;
mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
- if (c->ro_media) {
+ if (c->ro_error) {
ret = -EROFS;
goto out_unlock;
}
@@ -677,14 +719,12 @@ int ubifs_garbage_collect(struct ubifs_info *c, int anyway)
ret = ubifs_garbage_collect_leb(c, &lp);
if (ret < 0) {
- if (ret == -EAGAIN || ret == -ENOSPC) {
+ if (ret == -EAGAIN) {
/*
- * These codes are not errors, so we have to
- * return the LEB to lprops. But if the
- * 'ubifs_return_leb()' function fails, its
- * failure code is propagated to the caller
- * instead of the original '-EAGAIN' or
- * '-ENOSPC'.
+ * This is not error, so we have to return the
+ * LEB to lprops. But if 'ubifs_return_leb()'
+ * fails, its failure code is propagated to the
+ * caller instead of the original '-EAGAIN'.
*/
err = ubifs_return_leb(c, lp.lnum);
if (err)
@@ -774,8 +814,8 @@ out_unlock:
out:
ubifs_assert(ret < 0);
ubifs_assert(ret != -ENOSPC && ret != -EAGAIN);
- ubifs_ro_mode(c, ret);
ubifs_wbuf_sync_nolock(wbuf);
+ ubifs_ro_mode(c, ret);
mutex_unlock(&wbuf->io_mutex);
ubifs_return_leb(c, lp.lnum);
return ret;