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author | Omar Sandoval <osandov@fb.com> | 2018-05-11 13:13:30 -0700 |
---|---|---|
committer | David Sterba <dsterba@suse.com> | 2018-05-28 18:23:44 +0200 |
commit | fd86a3a31506fe4602ad056bc06a16f20e8eb30f (patch) | |
tree | 6d0122d556e1ff8fbd6fbac84523403f9d634cd6 /fs/btrfs/inode.c | |
parent | d1342aadbd9fcc82fd6e24c7f0443a43fe4714c7 (diff) | |
download | linux-stable-fd86a3a31506fe4602ad056bc06a16f20e8eb30f.tar.gz linux-stable-fd86a3a31506fe4602ad056bc06a16f20e8eb30f.tar.bz2 linux-stable-fd86a3a31506fe4602ad056bc06a16f20e8eb30f.zip |
Btrfs: fix error handling in btrfs_truncate_inode_items()
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 <nborisov@suse.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/inode.c')
-rw-r--r-- | fs/btrfs/inode.c | 55 |
1 files changed, 28 insertions, 27 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index a1d352fbe647..e0863deea1a5 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4705,7 +4705,6 @@ 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; @@ -4757,22 +4756,19 @@ search_again: * 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 */ @@ -4883,7 +4879,7 @@ search_again: * We have to bail so the last_size is set to * just before this extent. */ - err = NEED_TRUNCATE_BLOCK; + ret = NEED_TRUNCATE_BLOCK; break; } @@ -4950,7 +4946,7 @@ delete: pending_del_nr); if (ret) { btrfs_abort_transaction(trans, ret); - goto error; + break; } pending_del_nr = 0; } @@ -4961,8 +4957,8 @@ delete: trans->delayed_ref_updates = 0; ret = btrfs_run_delayed_refs(trans, updates * 2); - if (ret && !err) - err = ret; + if (ret) + break; } } /* @@ -4970,8 +4966,8 @@ delete: * and let the transaction restart */ if (should_end) { - err = -EAGAIN; - goto error; + ret = -EAGAIN; + break; } goto search_again; } else { @@ -4979,32 +4975,37 @@ delete: } } 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; } /* |