lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

btrfs: replace many BUG_ONs with proper error handling

Browse Source 
btrfs currently handles most errors with BUG_ON. This patch is a work-in-
 progress but aims to handle most errors other than internal logic
 errors and ENOMEM more gracefully.

 This iteration prevents most crashes but can run into lockups with
 the page lock on occasion when the timing "works out."

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
This commit is contained in:
Jeff Mahoney
2012-03-12 16:03:00 +01:00
committed by David Sterba
parent 49b25e0540
commit 79787eaab4
23 changed files with 980 additions and 385 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
fs/btrfs/delayed-inode.c
View File

@@ -115,6 +115,7 @@ static struct btrfs_delayed_node *btrfs_get_delayed_node(struct inode *inode)
return NULL;
}
/* Will return either the node or PTR_ERR(-ENOMEM) */
static struct btrfs_delayed_node *btrfs_get_or_create_delayed_node(
struct inode *inode)
{
@@ -1106,16 +1107,25 @@ static int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans,
return 0;
}
/* Called when committing the transaction. */
/*
* Called when committing the transaction.
* Returns 0 on success.
* Returns < 0 on error and returns with an aborted transaction with any
* outstanding delayed items cleaned up.
*/
int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_root *curr_root = root;
struct btrfs_delayed_root *delayed_root;
struct btrfs_delayed_node *curr_node, *prev_node;
struct btrfs_path *path;
struct btrfs_block_rsv *block_rsv;
int ret = 0;
if (trans->aborted)
return -EIO;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@@ -1128,17 +1138,18 @@ int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
curr_node = btrfs_first_delayed_node(delayed_root);
while (curr_node) {
root = curr_node->root;
ret = btrfs_insert_delayed_items(trans, path, root,
curr_root = curr_node->root;
ret = btrfs_insert_delayed_items(trans, path, curr_root,
curr_node);
if (!ret)
ret = btrfs_delete_delayed_items(trans, path, root,
curr_node);
ret = btrfs_delete_delayed_items(trans, path,
curr_root, curr_node);
if (!ret)
ret = btrfs_update_delayed_inode(trans, root, path,
curr_node);
ret = btrfs_update_delayed_inode(trans, curr_root,
path, curr_node);
if (ret) {
btrfs_release_delayed_node(curr_node);
btrfs_abort_transaction(trans, root, ret);
break;
}
@@ -1149,6 +1160,7 @@ int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
btrfs_free_path(path);
trans->block_rsv = block_rsv;
return ret;
}
@@ -1369,6 +1381,7 @@ void btrfs_balance_delayed_items(struct btrfs_root *root)
btrfs_wq_run_delayed_node(delayed_root, root, 0);
}
/* Will return 0 or -ENOMEM */
int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *name,
int name_len, struct inode *dir,