Upstream SHA1 d24a6e1087030b6da286df9433add5fa2f21b83b
This patch is bigger than the original, because some of the fixes in 3.12 ended
up in the wrong patches.
Dirty data accounting wasn't quite right - firstly, we were adding the key we're
inserting after it could have merged with another dirty key already in the
btree, and secondly we could sometimes pass the wrong offset to
bcache_dev_sectors_dirty_add() for dirty data we were overwriting - which is
important when tracking dirty data by stripe.
Signed-off-by: Kent Overstreet <kmo@xxxxxxxxxxxxx>
Cc: linux-stable <stable@xxxxxxxxxxxxxxx> # >= v3.10
Conflicts:
drivers/md/bcache/btree.c
Signed-off-by: Kent Overstreet <kmo@xxxxxxxxxxxxx>
---
drivers/md/bcache/btree.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 8c8aa484fb..bdf2af992e 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -1694,7 +1694,8 @@ static bool fix_overlapping_extents(struct btree *b,
if (KEY_START(k) > KEY_START(insert) + sectors_found)
goto check_failed;
- if (KEY_PTRS(&op->replace) != KEY_PTRS(k))
+ if (KEY_PTRS(k) != KEY_PTRS(&op->replace) ||
+ KEY_DIRTY(k) != KEY_DIRTY(&op->replace))
goto check_failed;
/* skip past gen */
@@ -1754,6 +1755,9 @@ static bool fix_overlapping_extents(struct btree *b,
if (bkey_cmp(insert, k) < 0) {
bch_cut_front(insert, k);
} else {
+ if (bkey_cmp(&START_KEY(insert), &START_KEY(k)) > 0)
+ old_offset = KEY_START(insert);
+
if (bkey_written(b, k) &&
bkey_cmp(&START_KEY(insert), &START_KEY(k)) <= 0) {
/*
@@ -1815,6 +1819,10 @@ static bool btree_insert_key(struct btree *b, struct btree_op *op,
if (fix_overlapping_extents(b, k, &iter, op))
return false;
+ if (KEY_DIRTY(k))
+ bcache_dev_sectors_dirty_add(b->c, KEY_INODE(k),
+ KEY_START(k), KEY_SIZE(k));
+
while (m != end(i) &&
bkey_cmp(k, &START_KEY(m)) > 0)
prev = m, m = bkey_next(m);
@@ -1843,10 +1851,6 @@ static bool btree_insert_key(struct btree *b, struct btree_op *op,
insert: shift_keys(b, m, k);
copy: bkey_copy(m, k);
merged:
- if (KEY_DIRTY(k))
- bcache_dev_sectors_dirty_add(b->c, KEY_INODE(k),
- KEY_START(k), KEY_SIZE(k));
-
bch_check_keys(b, "%s for %s at %s: %s", status,
op_type(op), pbtree(b), pkey(k));
bch_check_key_order_msg(b, i, "%s for %s at %s: %s", status,
--
1.8.5.2
--
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