Josef Bacik
2011-Jan-31 21:04 UTC
[PATCH] Btrfs: cleanup error handling in the truncate path
Now that we can handle having errors in the truncate path lets make sure we
return errors instead of doing BUG_ON() and such. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
---
fs/btrfs/inode.c | 61 +++++++++++++++++++++++++++++++++++++----------------
1 files changed, 42 insertions(+), 19 deletions(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 77645948..596bf64 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3586,13 +3586,15 @@ int btrfs_cont_expand(struct inode *inode, loff_t size)
err = btrfs_drop_extents(trans, inode, cur_offset,
cur_offset + hole_size,
&hint_byte, 1);
- BUG_ON(err);
+ if (err)
+ break;
err = btrfs_insert_file_extent(trans, root,
inode->i_ino, cur_offset, 0,
0, hole_size, 0, hole_size,
0, 0, 0);
- BUG_ON(err);
+ if (err)
+ break;
btrfs_drop_extent_cache(inode, hole_start,
last_byte - 1, 0);
@@ -3630,7 +3632,10 @@ static int btrfs_setsize(struct inode *inode, loff_t
newsize)
btrfs_set_trans_block_group(trans, inode);
ret = btrfs_orphan_add(trans, inode);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_end_transaction(trans, root);
+ return ret;
+ }
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
@@ -3647,17 +3652,24 @@ static int btrfs_setsize(struct inode *inode, loff_t
newsize)
}
trans = btrfs_start_transaction(root, 0);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
+
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = root->orphan_block_rsv;
BUG_ON(!trans->block_rsv);
+ /*
+ * If this fails just leave the orphan item so that it can get
+ * cleaned up next time we mount.
+ */
ret = btrfs_update_inode(trans, root, inode);
- BUG_ON(ret);
- if (inode->i_nlink > 0) {
- ret = btrfs_orphan_del(trans, inode);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_end_transaction(trans, root);
+ return ret;
}
+ if (inode->i_nlink > 0)
+ ret = btrfs_orphan_del(trans, inode);
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
btrfs_btree_balance_dirty(root, nr);
@@ -6338,6 +6350,7 @@ static int btrfs_truncate(struct inode *inode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret;
+ int err = 0;
struct btrfs_trans_handle *trans;
unsigned long nr;
u64 mask = root->sectorsize - 1;
@@ -6350,7 +6363,8 @@ static int btrfs_truncate(struct inode *inode)
btrfs_ordered_update_i_size(inode, inode->i_size, NULL);
trans = btrfs_start_transaction(root, 0);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = root->orphan_block_rsv;
@@ -6377,17 +6391,18 @@ static int btrfs_truncate(struct inode *inode)
while (1) {
if (!trans) {
trans = btrfs_start_transaction(root, 0);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = root->orphan_block_rsv;
}
ret = btrfs_block_rsv_check(trans, root,
root->orphan_block_rsv, 0, 5);
- if (ret) {
- BUG_ON(ret != -EAGAIN);
+ if (ret == -EAGAIN) {
ret = btrfs_commit_transaction(trans, root);
- BUG_ON(ret);
+ if (ret)
+ return ret;
trans = NULL;
continue;
}
@@ -6395,11 +6410,16 @@ static int btrfs_truncate(struct inode *inode)
ret = btrfs_truncate_inode_items(trans, root, inode,
inode->i_size,
BTRFS_EXTENT_DATA_KEY);
- if (ret != -EAGAIN)
+ if (ret != -EAGAIN) {
+ err = ret;
break;
+ }
ret = btrfs_update_inode(trans, root, inode);
- BUG_ON(ret);
+ if (ret) {
+ err = ret;
+ break;
+ }
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
@@ -6409,18 +6429,21 @@ static int btrfs_truncate(struct inode *inode)
if (ret == 0 && inode->i_nlink > 0) {
ret = btrfs_orphan_del(trans, inode);
- BUG_ON(ret);
+ if (ret)
+ err = ret;
}
ret = btrfs_update_inode(trans, root, inode);
- BUG_ON(ret);
+ if (ret && !err)
+ err = ret;
nr = trans->blocks_used;
ret = btrfs_end_transaction_throttle(trans, root);
- BUG_ON(ret);
+ if (ret && !err)
+ err = ret;
btrfs_btree_balance_dirty(root, nr);
- return ret;
+ return err;
}
/*
--
1.7.2.3
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