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Btrfs: fix tree mod log rewinded level and rewinding of moved keys

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When we rewind REMOVE_WHILE_FREEING operations, there's code that allocates
a fresh buffer instead of cloning the old one. Setting that buffer's level
correctly was missing in this case.

When rewinding a MOVE_KEYS operation, btrfs_node_key_ptr_offset(slot) was
missing for memmove_extent_buffer()'s arguments.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
This commit is contained in:
Jan Schmidt 2012-05-31 19:24:36 +02:00
parent f395694c2c
commit c31931088f
1 changed files with 4 additions and 2 deletions
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6
fs/btrfs/ctree.c
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@ -1076,7 +1076,9 @@ __tree_mod_log_rewind(struct extent_buffer *eb, u64 time_seq,
n--;
break;
case MOD_LOG_MOVE_KEYS:
memmove_extent_buffer(eb, tm->slot, tm->move.dst_slot,
o_dst = btrfs_node_key_ptr_offset(tm->slot);
o_src = btrfs_node_key_ptr_offset(tm->move.dst_slot);
memmove_extent_buffer(eb, o_dst, o_src,
tm->move.nr_items * p_size);
break;
case MOD_LOG_ROOT_REPLACE:
@ -1127,6 +1129,7 @@ tree_mod_log_rewind(struct btrfs_fs_info *fs_info, struct extent_buffer *eb,
btrfs_set_header_backref_rev(eb_rewin,
btrfs_header_backref_rev(eb));
btrfs_set_header_owner(eb_rewin, btrfs_header_owner(eb));
btrfs_set_header_level(eb_rewin, btrfs_header_level(eb));
} else {
eb_rewin = btrfs_clone_extent_buffer(eb);
BUG_ON(!eb_rewin);
@ -2609,7 +2612,6 @@ int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
}
again:
level = 0;
b = get_old_root(root, time_seq);
extent_buffer_get(b);
level = btrfs_header_level(b);