diff options
Diffstat (limited to 'fs/reiserfs/do_balan.c')
| -rw-r--r-- | fs/reiserfs/do_balan.c | 117 |
1 files changed, 65 insertions, 52 deletions
diff --git a/fs/reiserfs/do_balan.c b/fs/reiserfs/do_balan.c index 843c4023ad36..fcebfca0bbb8 100644 --- a/fs/reiserfs/do_balan.c +++ b/fs/reiserfs/do_balan.c @@ -626,71 +626,84 @@ static void balance_leaf_insert_right(struct tree_balance *tb, struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path); int n = B_NR_ITEMS(tbS0); struct buffer_info bi; - int ret_val; - if (n - tb->rnum[0] < tb->item_pos) { /* new item or its part falls to R[0] */ - if (tb->item_pos == n - tb->rnum[0] + 1 && tb->rbytes != -1) { /* part of new item falls into R[0] */ - loff_t old_key_comp, old_len, r_zeroes_number; - const char *r_body; - int version; - loff_t offset; + int ret; - leaf_shift_right(tb, tb->rnum[0] - 1, -1); + /* new item or part of it doesn't fall into R[0] */ + if (n - tb->rnum[0] >= tb->item_pos) { + leaf_shift_right(tb, tb->rnum[0], tb->rbytes); + return; + } - version = ih_version(ih); - /* Remember key component and item length */ - old_key_comp = le_ih_k_offset(ih); - old_len = ih_item_len(ih); + /* new item or its part falls to R[0] */ - /* Calculate key component and item length to insert into R[0] */ - offset = le_ih_k_offset(ih) + ((old_len - tb->rbytes) << (is_indirect_le_ih(ih) ? tb->tb_sb->s_blocksize_bits - UNFM_P_SHIFT : 0)); - set_le_ih_k_offset(ih, offset); - put_ih_item_len(ih, tb->rbytes); - /* Insert part of the item into R[0] */ - buffer_info_init_right(tb, &bi); - if ((old_len - tb->rbytes) > tb->zeroes_num) { - r_zeroes_number = 0; - r_body = body + (old_len - tb->rbytes) - tb->zeroes_num; - } else { - r_body = body; - r_zeroes_number = tb->zeroes_num - (old_len - tb->rbytes); - tb->zeroes_num -= r_zeroes_number; - } + /* part of new item falls into R[0] */ + if (tb->item_pos == n - tb->rnum[0] + 1 && tb->rbytes != -1) { + loff_t old_key_comp, old_len, r_zeroes_number; + const char *r_body; + int version, shift; + loff_t offset; + + leaf_shift_right(tb, tb->rnum[0] - 1, -1); - leaf_insert_into_buf(&bi, 0, ih, r_body, - r_zeroes_number); + version = ih_version(ih); - /* Replace right delimiting key by first key in R[0] */ - replace_key(tb, tb->CFR[0], tb->rkey[0], - tb->R[0], 0); + /* Remember key component and item length */ + old_key_comp = le_ih_k_offset(ih); + old_len = ih_item_len(ih); - /* Calculate key component and item length to insert into S[0] */ - set_le_ih_k_offset(ih, old_key_comp); - put_ih_item_len(ih, old_len - tb->rbytes); + /* + * Calculate key component and item length to insert + * into R[0] + */ + shift = 0; + if (is_indirect_le_ih(ih)) + shift = tb->tb_sb->s_blocksize_bits - UNFM_P_SHIFT; + offset = le_ih_k_offset(ih) + ((old_len - tb->rbytes) << shift); + set_le_ih_k_offset(ih, offset); + put_ih_item_len(ih, tb->rbytes); + + /* Insert part of the item into R[0] */ + buffer_info_init_right(tb, &bi); + if ((old_len - tb->rbytes) > tb->zeroes_num) { + r_zeroes_number = 0; + r_body = body + (old_len - tb->rbytes) - tb->zeroes_num; + } else { + r_body = body; + r_zeroes_number = tb->zeroes_num - + (old_len - tb->rbytes); + tb->zeroes_num -= r_zeroes_number; + } - tb->insert_size[0] -= tb->rbytes; + leaf_insert_into_buf(&bi, 0, ih, r_body, r_zeroes_number); - } else { /* whole new item falls into R[0] */ + /* Replace right delimiting key by first key in R[0] */ + replace_key(tb, tb->CFR[0], tb->rkey[0], tb->R[0], 0); - /* Shift rnum[0]-1 items to R[0] */ - ret_val = leaf_shift_right(tb, tb->rnum[0] - 1, tb->rbytes); - /* Insert new item into R[0] */ - buffer_info_init_right(tb, &bi); - leaf_insert_into_buf(&bi, tb->item_pos - n + tb->rnum[0] - 1, - ih, body, tb->zeroes_num); + /* + * Calculate key component and item length to + * insert into S[0] + */ + set_le_ih_k_offset(ih, old_key_comp); + put_ih_item_len(ih, old_len - tb->rbytes); - if (tb->item_pos - n + tb->rnum[0] - 1 == 0) { - replace_key(tb, tb->CFR[0], - tb->rkey[0], - tb->R[0], 0); + tb->insert_size[0] -= tb->rbytes; - } - tb->zeroes_num = tb->insert_size[0] = 0; - } - } else { /* new item or part of it doesn't fall into R[0] */ + } else { + /* whole new item falls into R[0] */ - leaf_shift_right(tb, tb->rnum[0], tb->rbytes); - } + /* Shift rnum[0]-1 items to R[0] */ + ret = leaf_shift_right(tb, tb->rnum[0] - 1, tb->rbytes); + + /* Insert new item into R[0] */ + buffer_info_init_right(tb, &bi); + leaf_insert_into_buf(&bi, tb->item_pos - n + tb->rnum[0] - 1, + ih, body, tb->zeroes_num); + if (tb->item_pos - n + tb->rnum[0] - 1 == 0) + replace_key(tb, tb->CFR[0], tb->rkey[0], tb->R[0], 0); + + tb->zeroes_num = tb->insert_size[0] = 0; + } } static void balance_leaf_paste_right(struct tree_balance *tb, |