diff options
Diffstat (limited to 'fs/reiserfs/do_balan.c')
| -rw-r--r-- | fs/reiserfs/do_balan.c | 108 |
1 files changed, 59 insertions, 49 deletions
diff --git a/fs/reiserfs/do_balan.c b/fs/reiserfs/do_balan.c index 6dbe55ff408e..44eb4f6ce0da 100644 --- a/fs/reiserfs/do_balan.c +++ b/fs/reiserfs/do_balan.c @@ -290,6 +290,64 @@ static int balance_leaf_when_delete(struct tree_balance *tb, int flag) return 0; } +static void balance_leaf_insert_left(struct tree_balance *tb, + struct item_head *ih, const char *body) +{ + int ret_val; + struct buffer_info bi; + int n = B_NR_ITEMS(tb->L[0]); + + if (tb->item_pos == tb->lnum[0] - 1 && tb->lbytes != -1) { + /* part of new item falls into L[0] */ + int new_item_len; + int version; + + ret_val = leaf_shift_left(tb, tb->lnum[0] - 1, -1); + + /* Calculate item length to insert to S[0] */ + new_item_len = ih_item_len(ih) - tb->lbytes; + /* Calculate and check item length to insert to L[0] */ + put_ih_item_len(ih, ih_item_len(ih) - new_item_len); + + RFALSE(ih_item_len(ih) <= 0, + "PAP-12080: there is nothing to insert into L[0]: ih_item_len=%d", + ih_item_len(ih)); + + /* Insert new item into L[0] */ + buffer_info_init_left(tb, &bi); + leaf_insert_into_buf(&bi, + n + tb->item_pos - ret_val, ih, body, + tb->zeroes_num > ih_item_len(ih) ? ih_item_len(ih) : tb->zeroes_num); + + version = ih_version(ih); + + /* Calculate key component, item length and body to insert into S[0] */ + set_le_ih_k_offset(ih, le_ih_k_offset(ih) + + (tb->lbytes << (is_indirect_le_ih(ih) ? tb->tb_sb->s_blocksize_bits - UNFM_P_SHIFT : 0))); + + put_ih_item_len(ih, new_item_len); + if (tb->lbytes > tb->zeroes_num) { + body += (tb->lbytes - tb->zeroes_num); + tb->zeroes_num = 0; + } else + tb->zeroes_num -= tb->lbytes; + + RFALSE(ih_item_len(ih) <= 0, + "PAP-12085: there is nothing to insert into S[0]: ih_item_len=%d", + ih_item_len(ih)); + } else { + /* new item in whole falls into L[0] */ + /* Shift lnum[0]-1 items to L[0] */ + ret_val = leaf_shift_left(tb, tb->lnum[0] - 1, tb->lbytes); + /* Insert new item into L[0] */ + buffer_info_init_left(tb, &bi); + leaf_insert_into_buf(&bi, n + tb->item_pos - ret_val, ih, body, tb->zeroes_num); + tb->insert_size[0] = 0; + tb->zeroes_num = 0; + } + +} + /** * balance_leaf - reiserfs tree balancing algorithm * @tb: tree balance state @@ -342,55 +400,7 @@ static int balance_leaf(struct tree_balance *tb, struct item_head *ih, switch (flag) { case M_INSERT: /* insert item into L[0] */ - - if (tb->item_pos == tb->lnum[0] - 1 && tb->lbytes != -1) { - /* part of new item falls into L[0] */ - int new_item_len; - int version; - - ret_val = leaf_shift_left(tb, tb->lnum[0] - 1, -1); - - /* Calculate item length to insert to S[0] */ - new_item_len = ih_item_len(ih) - tb->lbytes; - /* Calculate and check item length to insert to L[0] */ - put_ih_item_len(ih, ih_item_len(ih) - new_item_len); - - RFALSE(ih_item_len(ih) <= 0, - "PAP-12080: there is nothing to insert into L[0]: ih_item_len=%d", - ih_item_len(ih)); - - /* Insert new item into L[0] */ - buffer_info_init_left(tb, &bi); - leaf_insert_into_buf(&bi, - n + tb->item_pos - ret_val, ih, body, - tb->zeroes_num > ih_item_len(ih) ? ih_item_len(ih) : tb->zeroes_num); - - version = ih_version(ih); - - /* Calculate key component, item length and body to insert into S[0] */ - set_le_ih_k_offset(ih, le_ih_k_offset(ih) + - (tb-> lbytes << (is_indirect_le_ih(ih) ? tb->tb_sb-> s_blocksize_bits - UNFM_P_SHIFT : 0))); - - put_ih_item_len(ih, new_item_len); - if (tb->lbytes > tb->zeroes_num) { - body += (tb->lbytes - tb->zeroes_num); - tb->zeroes_num = 0; - } else - tb->zeroes_num -= tb->lbytes; - - RFALSE(ih_item_len(ih) <= 0, - "PAP-12085: there is nothing to insert into S[0]: ih_item_len=%d", - ih_item_len(ih)); - } else { - /* new item in whole falls into L[0] */ - /* Shift lnum[0]-1 items to L[0] */ - ret_val = leaf_shift_left(tb, tb->lnum[0] - 1, tb->lbytes); - /* Insert new item into L[0] */ - buffer_info_init_left(tb, &bi); - leaf_insert_into_buf(&bi, n + tb->item_pos - ret_val, ih, body, tb->zeroes_num); - tb->insert_size[0] = 0; - tb->zeroes_num = 0; - } + balance_leaf_insert_left(tb, ih, body); break; case M_PASTE: /* append item in L[0] */ |