From: Omar Sandoval <osan...@fb.com>
btrfs_truncate_inode_items() uses two variables for error handling, ret
and err. These are not handled consistently, leading to a couple of
bugs.
- Errors from btrfs_del_items() are handled but not propagated to the
caller
- If btrfs_run_delayed_refs() fails and aborts the transaction, we
continue running
Just use ret everywhere and simplify things a bit, fixing both of these
issues.
Fixes: 79787eaab461 ("btrfs: replace many BUG_ONs with proper error handling")
Fixes: 1262133b8d6f ("Btrfs: account for crcs in delayed ref processing")
Reviewed-by: Nikolay Borisov <nbori...@suse.com>
Signed-off-by: Omar Sandoval <osan...@fb.com>
---
fs/btrfs/inode.c | 55 ++++++++++++++++++++++++------------------------
1 file changed, 28 insertions(+), 27 deletions(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index fef8dbb6a93f..79d1da01a90d 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4442,7 +4442,6 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans,
int pending_del_slot = 0;
int extent_type = -1;
int ret;
- int err = 0;
u64 ino = btrfs_ino(BTRFS_I(inode));
u64 bytes_deleted = 0;
bool be_nice = false;
@@ -4494,22 +4493,19 @@ int btrfs_truncate_inode_items(struct
btrfs_trans_handle *trans,
* up a huge file in a single leaf. Most of the time that
* bytes_deleted is > 0, it will be huge by the time we get here
*/
- if (be_nice && bytes_deleted > SZ_32M) {
- if (btrfs_should_end_transaction(trans)) {
- err = -EAGAIN;
- goto error;
- }
+ if (be_nice && bytes_deleted > SZ_32M &&
+ btrfs_should_end_transaction(trans)) {
+ ret = -EAGAIN;
+ goto out;
}
-
path->leave_spinning = 1;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
- if (ret < 0) {
- err = ret;
+ if (ret < 0)
goto out;
- }
if (ret > 0) {
+ ret = 0;
/* there are no items in the tree for us to truncate, we're
* done
*/
@@ -4620,7 +4616,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans,
* We have to bail so the last_size is set to
* just before this extent.
*/
- err = NEED_TRUNCATE_BLOCK;
+ ret = NEED_TRUNCATE_BLOCK;
break;
}
@@ -4687,7 +4683,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans,
pending_del_nr);
if (ret) {
btrfs_abort_transaction(trans, ret);
- goto error;
+ break;
}
pending_del_nr = 0;
}
@@ -4698,8 +4694,8 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans,
trans->delayed_ref_updates = 0;
ret = btrfs_run_delayed_refs(trans,
updates * 2);
- if (ret && !err)
- err = ret;
+ if (ret)
+ break;
}
}
/*
@@ -4707,8 +4703,8 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans,
* and let the transaction restart
*/
if (should_end) {
- err = -EAGAIN;
- goto error;
+ ret = -EAGAIN;
+ break;
}
goto search_again;
} else {
@@ -4716,32 +4712,37 @@ int btrfs_truncate_inode_items(struct
btrfs_trans_handle *trans,
}
}
out:
- if (pending_del_nr) {
- ret = btrfs_del_items(trans, root, path, pending_del_slot,
+ if (ret >= 0 && pending_del_nr) {
+ int err;
+
+ err = btrfs_del_items(trans, root, path, pending_del_slot,
pending_del_nr);
- if (ret)
- btrfs_abort_transaction(trans, ret);
+ if (err) {
+ btrfs_abort_transaction(trans, err);
+ ret = err;
+ }
}
-error:
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
ASSERT(last_size >= new_size);
- if (!err && last_size > new_size)
+ if (!ret && last_size > new_size)
last_size = new_size;
btrfs_ordered_update_i_size(inode, last_size, NULL);
}
btrfs_free_path(path);
- if (be_nice && bytes_deleted > SZ_32M) {
+ if (be_nice && bytes_deleted > SZ_32M && (ret >= 0 || ret == -EAGAIN)) {
unsigned long updates = trans->delayed_ref_updates;
+ int err;
+
if (updates) {
trans->delayed_ref_updates = 0;
- ret = btrfs_run_delayed_refs(trans, updates * 2);
- if (ret && !err)
- err = ret;
+ err = btrfs_run_delayed_refs(trans, updates * 2);
+ if (err)
+ ret = err;
}
}
- return err;
+ return ret;
}
/*
--
2.17.0
--
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