diff options
Diffstat (limited to 'fs/reiserfs/ibalance.c')
| -rw-r--r-- | fs/reiserfs/ibalance.c | 1844 |
1 files changed, 938 insertions, 906 deletions
diff --git a/fs/reiserfs/ibalance.c b/fs/reiserfs/ibalance.c index a362125da0d8..6c5a726fd34b 100644 --- a/fs/reiserfs/ibalance.c +++ b/fs/reiserfs/ibalance.c @@ -10,13 +10,8 @@ #include <linux/buffer_head.h> /* this is one and only function that is used outside (do_balance.c) */ -int balance_internal ( - struct tree_balance * , - int, - int, - struct item_head * , - struct buffer_head ** - ); +int balance_internal(struct tree_balance *, + int, int, struct item_head *, struct buffer_head **); /* modes of internal_shift_left, internal_shift_right and internal_insert_childs */ #define INTERNAL_SHIFT_FROM_S_TO_L 0 @@ -27,464 +22,474 @@ int balance_internal ( #define INTERNAL_INSERT_TO_L 5 #define INTERNAL_INSERT_TO_R 6 -static void internal_define_dest_src_infos ( - int shift_mode, - struct tree_balance * tb, - int h, - struct buffer_info * dest_bi, - struct buffer_info * src_bi, - int * d_key, - struct buffer_head ** cf - ) +static void internal_define_dest_src_infos(int shift_mode, + struct tree_balance *tb, + int h, + struct buffer_info *dest_bi, + struct buffer_info *src_bi, + int *d_key, struct buffer_head **cf) { - memset (dest_bi, 0, sizeof (struct buffer_info)); - memset (src_bi, 0, sizeof (struct buffer_info)); - /* define dest, src, dest parent, dest position */ - switch (shift_mode) { - case INTERNAL_SHIFT_FROM_S_TO_L: /* used in internal_shift_left */ - src_bi->tb = tb; - src_bi->bi_bh = PATH_H_PBUFFER (tb->tb_path, h); - src_bi->bi_parent = PATH_H_PPARENT (tb->tb_path, h); - src_bi->bi_position = PATH_H_POSITION (tb->tb_path, h + 1); - dest_bi->tb = tb; - dest_bi->bi_bh = tb->L[h]; - dest_bi->bi_parent = tb->FL[h]; - dest_bi->bi_position = get_left_neighbor_position (tb, h); - *d_key = tb->lkey[h]; - *cf = tb->CFL[h]; - break; - case INTERNAL_SHIFT_FROM_L_TO_S: - src_bi->tb = tb; - src_bi->bi_bh = tb->L[h]; - src_bi->bi_parent = tb->FL[h]; - src_bi->bi_position = get_left_neighbor_position (tb, h); - dest_bi->tb = tb; - dest_bi->bi_bh = PATH_H_PBUFFER (tb->tb_path, h); - dest_bi->bi_parent = PATH_H_PPARENT (tb->tb_path, h); - dest_bi->bi_position = PATH_H_POSITION (tb->tb_path, h + 1); /* dest position is analog of dest->b_item_order */ - *d_key = tb->lkey[h]; - *cf = tb->CFL[h]; - break; - - case INTERNAL_SHIFT_FROM_R_TO_S: /* used in internal_shift_left */ - src_bi->tb = tb; - src_bi->bi_bh = tb->R[h]; - src_bi->bi_parent = tb->FR[h]; - src_bi->bi_position = get_right_neighbor_position (tb, h); - dest_bi->tb = tb; - dest_bi->bi_bh = PATH_H_PBUFFER (tb->tb_path, h); - dest_bi->bi_parent = PATH_H_PPARENT (tb->tb_path, h); - dest_bi->bi_position = PATH_H_POSITION (tb->tb_path, h + 1); - *d_key = tb->rkey[h]; - *cf = tb->CFR[h]; - break; - - case INTERNAL_SHIFT_FROM_S_TO_R: - src_bi->tb = tb; - src_bi->bi_bh = PATH_H_PBUFFER (tb->tb_path, h); - src_bi->bi_parent = PATH_H_PPARENT (tb->tb_path, h); - src_bi->bi_position = PATH_H_POSITION (tb->tb_path, h + 1); - dest_bi->tb = tb; - dest_bi->bi_bh = tb->R[h]; - dest_bi->bi_parent = tb->FR[h]; - dest_bi->bi_position = get_right_neighbor_position (tb, h); - *d_key = tb->rkey[h]; - *cf = tb->CFR[h]; - break; - - case INTERNAL_INSERT_TO_L: - dest_bi->tb = tb; - dest_bi->bi_bh = tb->L[h]; - dest_bi->bi_parent = tb->FL[h]; - dest_bi->bi_position = get_left_neighbor_position (tb, h); - break; - - case INTERNAL_INSERT_TO_S: - dest_bi->tb = tb; - dest_bi->bi_bh = PATH_H_PBUFFER (tb->tb_path, h); - dest_bi->bi_parent = PATH_H_PPARENT (tb->tb_path, h); - dest_bi->bi_position = PATH_H_POSITION (tb->tb_path, h + 1); - break; - - case INTERNAL_INSERT_TO_R: - dest_bi->tb = tb; - dest_bi->bi_bh = tb->R[h]; - dest_bi->bi_parent = tb->FR[h]; - dest_bi->bi_position = get_right_neighbor_position (tb, h); - break; - - default: - reiserfs_panic (tb->tb_sb, "internal_define_dest_src_infos: shift type is unknown (%d)", shift_mode); - } + memset(dest_bi, 0, sizeof(struct buffer_info)); + memset(src_bi, 0, sizeof(struct buffer_info)); + /* define dest, src, dest parent, dest position */ + switch (shift_mode) { + case INTERNAL_SHIFT_FROM_S_TO_L: /* used in internal_shift_left */ + src_bi->tb = tb; + src_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h); + src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h); + src_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1); + dest_bi->tb = tb; + dest_bi->bi_bh = tb->L[h]; + dest_bi->bi_parent = tb->FL[h]; + dest_bi->bi_position = get_left_neighbor_position(tb, h); + *d_key = tb->lkey[h]; + *cf = tb->CFL[h]; + break; + case INTERNAL_SHIFT_FROM_L_TO_S: + src_bi->tb = tb; + src_bi->bi_bh = tb->L[h]; + src_bi->bi_parent = tb->FL[h]; + src_bi->bi_position = get_left_neighbor_position(tb, h); + dest_bi->tb = tb; + dest_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h); + dest_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h); + dest_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1); /* dest position is analog of dest->b_item_order */ + *d_key = tb->lkey[h]; + *cf = tb->CFL[h]; + break; + + case INTERNAL_SHIFT_FROM_R_TO_S: /* used in internal_shift_left */ + src_bi->tb = tb; + src_bi->bi_bh = tb->R[h]; + src_bi->bi_parent = tb->FR[h]; + src_bi->bi_position = get_right_neighbor_position(tb, h); + dest_bi->tb = tb; + dest_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h); + dest_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h); + dest_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1); + *d_key = tb->rkey[h]; + *cf = tb->CFR[h]; + break; + + case INTERNAL_SHIFT_FROM_S_TO_R: + src_bi->tb = tb; + src_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h); + src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h); + src_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1); + dest_bi->tb = tb; + dest_bi->bi_bh = tb->R[h]; + dest_bi->bi_parent = tb->FR[h]; + dest_bi->bi_position = get_right_neighbor_position(tb, h); + *d_key = tb->rkey[h]; + *cf = tb->CFR[h]; + break; + + case INTERNAL_INSERT_TO_L: + dest_bi->tb = tb; + dest_bi->bi_bh = tb->L[h]; + dest_bi->bi_parent = tb->FL[h]; + dest_bi->bi_position = get_left_neighbor_position(tb, h); + break; + + case INTERNAL_INSERT_TO_S: + dest_bi->tb = tb; + dest_bi->bi_bh = PATH_H_PBUFFER(tb->tb_path, h); + dest_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, h); + dest_bi->bi_position = PATH_H_POSITION(tb->tb_path, h + 1); + break; + + case INTERNAL_INSERT_TO_R: + dest_bi->tb = tb; + dest_bi->bi_bh = tb->R[h]; + dest_bi->bi_parent = tb->FR[h]; + dest_bi->bi_position = get_right_neighbor_position(tb, h); + break; + + default: + reiserfs_panic(tb->tb_sb, + "internal_define_dest_src_infos: shift type is unknown (%d)", + shift_mode); + } } - - /* Insert count node pointers into buffer cur before position to + 1. * Insert count items into buffer cur before position to. * Items and node pointers are specified by inserted and bh respectively. - */ -static void internal_insert_childs (struct buffer_info * cur_bi, - int to, int count, - struct item_head * inserted, - struct buffer_head ** bh - ) + */ +static void internal_insert_childs(struct buffer_info *cur_bi, + int to, int count, + struct item_head *inserted, + struct buffer_head **bh) { - struct buffer_head * cur = cur_bi->bi_bh; - struct block_head * blkh; - int nr; - struct reiserfs_key * ih; - struct disk_child new_dc[2]; - struct disk_child * dc; - int i; - - if (count <= 0) - return; - - blkh = B_BLK_HEAD(cur); - nr = blkh_nr_item(blkh); - - RFALSE( count > 2, - "too many children (%d) are to be inserted", count); - RFALSE( B_FREE_SPACE (cur) < count * (KEY_SIZE + DC_SIZE), - "no enough free space (%d), needed %d bytes", - B_FREE_SPACE (cur), count * (KEY_SIZE + DC_SIZE)); - - /* prepare space for count disk_child */ - dc = B_N_CHILD(cur,to+1); - - memmove (dc + count, dc, (nr+1-(to+1)) * DC_SIZE); - - /* copy to_be_insert disk children */ - for (i = 0; i < count; i ++) { - put_dc_size( &(new_dc[i]), MAX_CHILD_SIZE(bh[i]) - B_FREE_SPACE(bh[i])); - put_dc_block_number( &(new_dc[i]), bh[i]->b_blocknr ); - } - memcpy (dc, new_dc, DC_SIZE * count); - - - /* prepare space for count items */ - ih = B_N_PDELIM_KEY (cur, ((to == -1) ? 0 : to)); - - memmove (ih + count, ih, (nr - to) * KEY_SIZE + (nr + 1 + count) * DC_SIZE); - - /* copy item headers (keys) */ - memcpy (ih, inserted, KEY_SIZE); - if ( count > 1 ) - memcpy (ih + 1, inserted + 1, KEY_SIZE); - - /* sizes, item number */ - set_blkh_nr_item( blkh, blkh_nr_item(blkh) + count ); - set_blkh_free_space( blkh, - blkh_free_space(blkh) - count * (DC_SIZE + KEY_SIZE ) ); - - do_balance_mark_internal_dirty (cur_bi->tb, cur,0); - - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - check_internal (cur); - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - - if (cur_bi->bi_parent) { - struct disk_child *t_dc = B_N_CHILD (cur_bi->bi_parent,cur_bi->bi_position); - put_dc_size( t_dc, dc_size(t_dc) + (count * (DC_SIZE + KEY_SIZE))); - do_balance_mark_internal_dirty(cur_bi->tb, cur_bi->bi_parent, 0); - - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - check_internal (cur_bi->bi_parent); - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - } + struct buffer_head *cur = cur_bi->bi_bh; + struct block_head *blkh; + int nr; + struct reiserfs_key *ih; + struct disk_child new_dc[2]; + struct disk_child *dc; + int i; + + if (count <= 0) + return; + + blkh = B_BLK_HEAD(cur); + nr = blkh_nr_item(blkh); + + RFALSE(count > 2, "too many children (%d) are to be inserted", count); + RFALSE(B_FREE_SPACE(cur) < count * (KEY_SIZE + DC_SIZE), + "no enough free space (%d), needed %d bytes", + B_FREE_SPACE(cur), count * (KEY_SIZE + DC_SIZE)); + + /* prepare space for count disk_child */ + dc = B_N_CHILD(cur, to + 1); + + memmove(dc + count, dc, (nr + 1 - (to + 1)) * DC_SIZE); + + /* copy to_be_insert disk children */ + for (i = 0; i < count; i++) { + put_dc_size(&(new_dc[i]), + MAX_CHILD_SIZE(bh[i]) - B_FREE_SPACE(bh[i])); + put_dc_block_number(&(new_dc[i]), bh[i]->b_blocknr); + } + memcpy(dc, new_dc, DC_SIZE * count); + + /* prepare space for count items */ + ih = B_N_PDELIM_KEY(cur, ((to == -1) ? 0 : to)); + + memmove(ih + count, ih, + (nr - to) * KEY_SIZE + (nr + 1 + count) * DC_SIZE); + + /* copy item headers (keys) */ + memcpy(ih, inserted, KEY_SIZE); + if (count > 1) + memcpy(ih + 1, inserted + 1, KEY_SIZE); + + /* sizes, item number */ + set_blkh_nr_item(blkh, blkh_nr_item(blkh) + count); + set_blkh_free_space(blkh, + blkh_free_space(blkh) - count * (DC_SIZE + + KEY_SIZE)); + + do_balance_mark_internal_dirty(cur_bi->tb, cur, 0); + + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + check_internal(cur); + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + + if (cur_bi->bi_parent) { + struct disk_child *t_dc = + B_N_CHILD(cur_bi->bi_parent, cur_bi->bi_position); + put_dc_size(t_dc, + dc_size(t_dc) + (count * (DC_SIZE + KEY_SIZE))); + do_balance_mark_internal_dirty(cur_bi->tb, cur_bi->bi_parent, + 0); + + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + check_internal(cur_bi->bi_parent); + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + } } - /* Delete del_num items and node pointers from buffer cur starting from * * the first_i'th item and first_p'th pointers respectively. */ -static void internal_delete_pointers_items ( - struct buffer_info * cur_bi, - int first_p, - int first_i, - int del_num - ) +static void internal_delete_pointers_items(struct buffer_info *cur_bi, + int first_p, + int first_i, int del_num) { - struct buffer_head * cur = cur_bi->bi_bh; - int nr; - struct block_head * blkh; - struct reiserfs_key * key; - struct disk_child * dc; - - RFALSE( cur == NULL, "buffer is 0"); - RFALSE( del_num < 0, - "negative number of items (%d) can not be deleted", del_num); - RFALSE( first_p < 0 || first_p + del_num > B_NR_ITEMS (cur) + 1 || first_i < 0, - "first pointer order (%d) < 0 or " - "no so many pointers (%d), only (%d) or " - "first key order %d < 0", first_p, - first_p + del_num, B_NR_ITEMS (cur) + 1, first_i); - if ( del_num == 0 ) - return; - - blkh = B_BLK_HEAD(cur); - nr = blkh_nr_item(blkh); - - if ( first_p == 0 && del_num == nr + 1 ) { - RFALSE( first_i != 0, "1st deleted key must have order 0, not %d", first_i); - make_empty_node (cur_bi); - return; - } - - RFALSE( first_i + del_num > B_NR_ITEMS (cur), - "first_i = %d del_num = %d " - "no so many keys (%d) in the node (%b)(%z)", - first_i, del_num, first_i + del_num, cur, cur); - - - /* deleting */ - dc = B_N_CHILD (cur, first_p); - - memmove (dc, dc + del_num, (nr + 1 - first_p - del_num) * DC_SIZE); - key = B_N_PDELIM_KEY (cur, first_i); - memmove (key, key + del_num, (nr - first_i - del_num) * KEY_SIZE + (nr + 1 - del_num) * DC_SIZE); - - - /* sizes, item number */ - set_blkh_nr_item( blkh, blkh_nr_item(blkh) - del_num ); - set_blkh_free_space( blkh, - blkh_free_space(blkh) + (del_num * (KEY_SIZE + DC_SIZE) ) ); - - do_balance_mark_internal_dirty (cur_bi->tb, cur, 0); - /*&&&&&&&&&&&&&&&&&&&&&&&*/ - check_internal (cur); - /*&&&&&&&&&&&&&&&&&&&&&&&*/ - - if (cur_bi->bi_parent) { - struct disk_child *t_dc; - t_dc = B_N_CHILD (cur_bi->bi_parent, cur_bi->bi_position); - put_dc_size( t_dc, dc_size(t_dc) - (del_num * (KEY_SIZE + DC_SIZE) ) ); - - do_balance_mark_internal_dirty (cur_bi->tb, cur_bi->bi_parent,0); - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - check_internal (cur_bi->bi_parent); - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - } -} + struct buffer_head *cur = cur_bi->bi_bh; + int nr; + struct block_head *blkh; + struct reiserfs_key *key; + struct disk_child *dc; + + RFALSE(cur == NULL, "buffer is 0"); + RFALSE(del_num < 0, + "negative number of items (%d) can not be deleted", del_num); + RFALSE(first_p < 0 || first_p + del_num > B_NR_ITEMS(cur) + 1 + || first_i < 0, + "first pointer order (%d) < 0 or " + "no so many pointers (%d), only (%d) or " + "first key order %d < 0", first_p, first_p + del_num, + B_NR_ITEMS(cur) + 1, first_i); + if (del_num == 0) + return; + + blkh = B_BLK_HEAD(cur); + nr = blkh_nr_item(blkh); + + if (first_p == 0 && del_num == nr + 1) { + RFALSE(first_i != 0, + "1st deleted key must have order 0, not %d", first_i); + make_empty_node(cur_bi); + return; + } + RFALSE(first_i + del_num > B_NR_ITEMS(cur), + "first_i = %d del_num = %d " + "no so many keys (%d) in the node (%b)(%z)", + first_i, del_num, first_i + del_num, cur, cur); + + /* deleting */ + dc = B_N_CHILD(cur, first_p); + + memmove(dc, dc + del_num, (nr + 1 - first_p - del_num) * DC_SIZE); + key = B_N_PDELIM_KEY(cur, first_i); + memmove(key, key + del_num, + (nr - first_i - del_num) * KEY_SIZE + (nr + 1 - + del_num) * DC_SIZE); + + /* sizes, item number */ + set_blkh_nr_item(blkh, blkh_nr_item(blkh) - del_num); + set_blkh_free_space(blkh, + blkh_free_space(blkh) + + (del_num * (KEY_SIZE + DC_SIZE))); + + do_balance_mark_internal_dirty(cur_bi->tb, cur, 0); + /*&&&&&&&&&&&&&&&&&&&&&&& */ + check_internal(cur); + /*&&&&&&&&&&&&&&&&&&&&&&& */ + + if (cur_bi->bi_parent) { + struct disk_child *t_dc; + t_dc = B_N_CHILD(cur_bi->bi_parent, cur_bi->bi_position); + put_dc_size(t_dc, + dc_size(t_dc) - (del_num * (KEY_SIZE + DC_SIZE))); + + do_balance_mark_internal_dirty(cur_bi->tb, cur_bi->bi_parent, + 0); + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + check_internal(cur_bi->bi_parent); + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + } +} /* delete n node pointers and items starting from given position */ -static void internal_delete_childs (struct buffer_info * cur_bi, - int from, int n) +static void internal_delete_childs(struct buffer_info *cur_bi, int from, int n) { - int i_from; + int i_from; - i_from = (from == 0) ? from : from - 1; + i_from = (from == 0) ? from : from - 1; - /* delete n pointers starting from `from' position in CUR; - delete n keys starting from 'i_from' position in CUR; - */ - internal_delete_pointers_items (cur_bi, from, i_from, n); + /* delete n pointers starting from `from' position in CUR; + delete n keys starting from 'i_from' position in CUR; + */ + internal_delete_pointers_items(cur_bi, from, i_from, n); } - /* copy cpy_num node pointers and cpy_num - 1 items from buffer src to buffer dest * last_first == FIRST_TO_LAST means, that we copy first items from src to tail of dest * last_first == LAST_TO_FIRST means, that we copy last items from src to head of dest */ -static void internal_copy_pointers_items ( - struct buffer_info * dest_bi, - struct buffer_head * src, - int last_first, int cpy_num - ) +static void internal_copy_pointers_items(struct buffer_info *dest_bi, + struct buffer_head *src, + int last_first, int cpy_num) { - /* ATTENTION! Number of node pointers in DEST is equal to number of items in DEST * - * as delimiting key have already inserted to buffer dest.*/ - struct buffer_head * dest = dest_bi->bi_bh; - int nr_dest, nr_src; - int dest_order, src_order; - struct block_head * blkh; - struct reiserfs_key * key; - struct disk_child * dc; - - nr_src = B_NR_ITEMS (src); - - RFALSE( dest == NULL || src == NULL, - "src (%p) or dest (%p) buffer is 0", src, dest); - RFALSE( last_first != FIRST_TO_LAST && last_first != LAST_TO_FIRST, - "invalid last_first parameter (%d)", last_first); - RFALSE( nr_src < cpy_num - 1, - "no so many items (%d) in src (%d)", cpy_num, nr_src); - RFALSE( cpy_num < 0, "cpy_num less than 0 (%d)", cpy_num); - RFALSE( cpy_num - 1 + B_NR_ITEMS(dest) > (int)MAX_NR_KEY(dest), - "cpy_num (%d) + item number in dest (%d) can not be > MAX_NR_KEY(%d)", - cpy_num, B_NR_ITEMS(dest), MAX_NR_KEY(dest)); - - if ( cpy_num == 0 ) - return; + /* ATTENTION! Number of node pointers in DEST is equal to number of items in DEST * + * as delimiting key have already inserted to buffer dest.*/ + struct buffer_head *dest = dest_bi->bi_bh; + int nr_dest, nr_src; + int dest_order, src_order; + struct block_head *blkh; + struct reiserfs_key *key; + struct disk_child *dc; + + nr_src = B_NR_ITEMS(src); + + RFALSE(dest == NULL || src == NULL, + "src (%p) or dest (%p) buffer is 0", src, dest); + RFALSE(last_first != FIRST_TO_LAST && last_first != LAST_TO_FIRST, + "invalid last_first parameter (%d)", last_first); + RFALSE(nr_src < cpy_num - 1, + "no so many items (%d) in src (%d)", cpy_num, nr_src); + RFALSE(cpy_num < 0, "cpy_num less than 0 (%d)", cpy_num); + RFALSE(cpy_num - 1 + B_NR_ITEMS(dest) > (int)MAX_NR_KEY(dest), + "cpy_num (%d) + item number in dest (%d) can not be > MAX_NR_KEY(%d)", + cpy_num, B_NR_ITEMS(dest), MAX_NR_KEY(dest)); + + if (cpy_num == 0) + return; /* coping */ - blkh = B_BLK_HEAD(dest); - nr_dest = blkh_nr_item(blkh); + blkh = B_BLK_HEAD(dest); + nr_dest = blkh_nr_item(blkh); - /*dest_order = (last_first == LAST_TO_FIRST) ? 0 : nr_dest;*/ - /*src_order = (last_first == LAST_TO_FIRST) ? (nr_src - cpy_num + 1) : 0;*/ - (last_first == LAST_TO_FIRST) ? (dest_order = 0, src_order = nr_src - cpy_num + 1) : - (dest_order = nr_dest, src_order = 0); + /*dest_order = (last_first == LAST_TO_FIRST) ? 0 : nr_dest; */ + /*src_order = (last_first == LAST_TO_FIRST) ? (nr_src - cpy_num + 1) : 0; */ + (last_first == LAST_TO_FIRST) ? (dest_order = 0, src_order = + nr_src - cpy_num + 1) : (dest_order = + nr_dest, + src_order = + 0); - /* prepare space for cpy_num pointers */ - dc = B_N_CHILD (dest, dest_order); + /* prepare space for cpy_num pointers */ + dc = B_N_CHILD(dest, dest_order); - memmove (dc + cpy_num, dc, (nr_dest - dest_order) * DC_SIZE); + memmove(dc + cpy_num, dc, (nr_dest - dest_order) * DC_SIZE); /* insert pointers */ - memcpy (dc, B_N_CHILD (src, src_order), DC_SIZE * cpy_num); - - - /* prepare space for cpy_num - 1 item headers */ - key = B_N_PDELIM_KEY(dest, dest_order); - memmove (key + cpy_num - 1, key, - KEY_SIZE * (nr_dest - dest_order) + DC_SIZE * (nr_dest + cpy_num)); - - - /* insert headers */ - memcpy (key, B_N_PDELIM_KEY (src, src_order), KEY_SIZE * (cpy_num - 1)); - - /* sizes, item number */ - set_blkh_nr_item( blkh, blkh_nr_item(blkh) + (cpy_num - 1 ) ); - set_blkh_free_space( blkh, - blkh_free_space(blkh) - (KEY_SIZE * (cpy_num - 1) + DC_SIZE * cpy_num ) ); - - do_balance_mark_internal_dirty (dest_bi->tb, dest, 0); - - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - check_internal (dest); - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - - if (dest_bi->bi_parent) { - struct disk_child *t_dc; - t_dc = B_N_CHILD(dest_bi->bi_parent,dest_bi->bi_position); - put_dc_size( t_dc, dc_size(t_dc) + (KEY_SIZE * (cpy_num - 1) + DC_SIZE * cpy_num) ); - - do_balance_mark_internal_dirty (dest_bi->tb, dest_bi->bi_parent,0); - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - check_internal (dest_bi->bi_parent); - /*&&&&&&&&&&&&&&&&&&&&&&&&*/ - } + memcpy(dc, B_N_CHILD(src, src_order), DC_SIZE * cpy_num); + + /* prepare space for cpy_num - 1 item headers */ + key = B_N_PDELIM_KEY(dest, dest_order); + memmove(key + cpy_num - 1, key, + KEY_SIZE * (nr_dest - dest_order) + DC_SIZE * (nr_dest + + cpy_num)); + + /* insert headers */ + memcpy(key, B_N_PDELIM_KEY(src, src_order), KEY_SIZE * (cpy_num - 1)); + + /* sizes, item number */ + set_blkh_nr_item(blkh, blkh_nr_item(blkh) + (cpy_num - 1)); + set_blkh_free_space(blkh, + blkh_free_space(blkh) - (KEY_SIZE * (cpy_num - 1) + + DC_SIZE * cpy_num)); + + do_balance_mark_internal_dirty(dest_bi->tb, dest, 0); + + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + check_internal(dest); + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + + if (dest_bi->bi_parent) { + struct disk_child *t_dc; + t_dc = B_N_CHILD(dest_bi->bi_parent, dest_bi->bi_position); + put_dc_size(t_dc, + dc_size(t_dc) + (KEY_SIZE * (cpy_num - 1) + + DC_SIZE * cpy_num)); + + do_balance_mark_internal_dirty(dest_bi->tb, dest_bi->bi_parent, + 0); + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + check_internal(dest_bi->bi_parent); + /*&&&&&&&&&&&&&&&&&&&&&&&& */ + } } - /* Copy cpy_num node pointers and cpy_num - 1 items from buffer src to buffer dest. * Delete cpy_num - del_par items and node pointers from buffer src. * last_first == FIRST_TO_LAST means, that we copy/delete first items from src. * last_first == LAST_TO_FIRST means, that we copy/delete last items from src. */ -static void internal_move_pointers_items (struct buffer_info * dest_bi, - struct buffer_info * src_bi, - int last_first, int cpy_num, int del_par) +static void internal_move_pointers_items(struct buffer_info *dest_bi, + struct buffer_info *src_bi, + int last_first, int cpy_num, + int del_par) { - int first_pointer; - int first_item; - - internal_copy_pointers_items (dest_bi, src_bi->bi_bh, last_first, cpy_num); - - if (last_first == FIRST_TO_LAST) { /* shift_left occurs */ - first_pointer = 0; - first_item = 0; - /* delete cpy_num - del_par pointers and keys starting for pointers with first_pointer, - for key - with first_item */ - internal_delete_pointers_items (src_bi, first_pointer, first_item, cpy_num - del_par); - } else { /* shift_right occurs */ - int i, j; - - i = ( cpy_num - del_par == ( j = B_NR_ITEMS(src_bi->bi_bh)) + 1 ) ? 0 : j - cpy_num + del_par; - - internal_delete_pointers_items (src_bi, j + 1 - cpy_num + del_par, i, cpy_num - del_par); - } + int first_pointer; + int first_item; + + internal_copy_pointers_items(dest_bi, src_bi->bi_bh, last_first, + cpy_num); + + if (last_first == FIRST_TO_LAST) { /* shift_left occurs */ + first_pointer = 0; + first_item = 0; + /* delete cpy_num - del_par pointers and keys starting for pointers with first_pointer, + for key - with first_item */ + internal_delete_pointers_items(src_bi, first_pointer, + first_item, cpy_num - del_par); + } else { /* shift_right occurs */ + int i, j; + + i = (cpy_num - del_par == + (j = + B_NR_ITEMS(src_bi->bi_bh)) + 1) ? 0 : j - cpy_num + + del_par; + + internal_delete_pointers_items(src_bi, + j + 1 - cpy_num + del_par, i, + cpy_num - del_par); + } } /* Insert n_src'th key of buffer src before n_dest'th key of buffer dest. */ -static void internal_insert_key (struct buffer_info * dest_bi, - int dest_position_before, /* insert key before key with n_dest number */ - struct buffer_head * src, - int src_position) +static void internal_insert_key(struct buffer_info *dest_bi, int dest_position_before, /* insert key before key with n_dest number */ + struct buffer_head *src, int src_position) { - struct buffer_head * dest = dest_bi->bi_bh; - int nr; - struct block_head * blkh; - struct reiserfs_key * key; - - RFALSE( dest == NULL || src == NULL, - "source(%p) or dest(%p) buffer is 0", src, dest); - RFALSE( dest_position_before < 0 || src_position < 0, - "source(%d) or dest(%d) key number less than 0", - src_position, dest_position_before); - RFALSE( dest_position_before > B_NR_ITEMS (dest) || - src_position >= B_NR_ITEMS(src), - "invalid position in dest (%d (key number %d)) or in src (%d (key number %d))", - dest_position_before, B_NR_ITEMS (dest), - src_position, B_NR_ITEMS(src)); - RFALSE( B_FREE_SPACE (dest) < KEY_SIZE, - "no enough free space (%d) in dest buffer", B_FREE_SPACE (dest)); - - blkh = B_BLK_HEAD(dest); - nr = blkh_nr_item(blkh); - - /* prepare space for inserting key */ - key = B_N_PDELIM_KEY (dest, dest_position_before); - memmove (key + 1, key, (nr - dest_position_before) * KEY_SIZE + (nr + 1) * DC_SIZE); - - /* insert key */ - memcpy (key, B_N_PDELIM_KEY(src, src_position), KEY_SIZE); - - /* Change dirt, free space, item number fields. */ - - set_blkh_nr_item( blkh, blkh_nr_item(blkh) + 1 ); - set_blkh_free_space( blkh, blkh_free_space(blkh) - KEY_SIZE ); - - do_balance_mark_internal_dirty (dest_bi->tb, dest, 0); - - if (dest_bi->bi_parent) { - struct disk_child *t_dc; - t_dc = B_N_CHILD(dest_bi->bi_parent,dest_bi->bi_position); - put_dc_size( t_dc, dc_size(t_dc) + KEY_SIZE ); - - do_balance_mark_internal_dirty (dest_bi->tb, dest_bi->bi_parent,0); - } + struct buffer_head *dest = dest_bi->bi_bh; + int nr; + struct block_head *blkh; + struct reiserfs_key *key; + + RFALSE(dest == NULL || src == NULL, + "source(%p) or dest(%p) buffer is 0", src, dest); + RFALSE(dest_position_before < 0 || src_position < 0, + "source(%d) or dest(%d) key number less than 0", + src_position, dest_position_before); + RFALSE(dest_position_before > B_NR_ITEMS(dest) || + src_position >= B_NR_ITEMS(src), + "invalid position in dest (%d (key number %d)) or in src (%d (key number %d))", + dest_position_before, B_NR_ITEMS(dest), + src_position, B_NR_ITEMS(src)); + RFALSE(B_FREE_SPACE(dest) < KEY_SIZE, + "no enough free space (%d) in dest buffer", B_FREE_SPACE(dest)); + + blkh = B_BLK_HEAD(dest); + nr = blkh_nr_item(blkh); + + /* prepare space for inserting key */ + key = B_N_PDELIM_KEY(dest, dest_position_before); + memmove(key + 1, key, + (nr - dest_position_before) * KEY_SIZE + (nr + 1) * DC_SIZE); + + /* insert key */ + memcpy(key, B_N_PDELIM_KEY(src, src_position), KEY_SIZE); + + /* Change dirt, free space, item number fields. */ + + set_blkh_nr_item(blkh, blkh_nr_item(blkh) + 1); + set_blkh_free_space(blkh, blkh_free_space(blkh) - KEY_SIZE); + + do_balance_mark_internal_dirty(dest_bi->tb, dest, 0); + + if (dest_bi->bi_parent) { + struct disk_child *t_dc; + t_dc = B_N_CHILD(dest_bi->bi_parent, dest_bi->bi_position); + put_dc_size(t_dc, dc_size(t_dc) + KEY_SIZE); + + do_balance_mark_internal_dirty(dest_bi->tb, dest_bi->bi_parent, + 0); + } } - - /* Insert d_key'th (delimiting) key from buffer cfl to tail of dest. * Copy pointer_amount node pointers and pointer_amount - 1 items from buffer src to buffer dest. * Replace d_key'th key in buffer cfl. * Delete pointer_amount items and node pointers from buffer src. */ /* this can be invoked both to shift from S to L and from R to S */ -static void internal_shift_left ( - int mode, /* INTERNAL_FROM_S_TO_L | INTERNAL_FROM_R_TO_S */ - struct tree_balance * tb, - int h, - int pointer_amount - ) +static void internal_shift_left(int mode, /* INTERNAL_FROM_S_TO_L | INTERNAL_FROM_R_TO_S */ + struct tree_balance *tb, + int h, int pointer_amount) { - struct buffer_info dest_bi, src_bi; - struct buffer_head * cf; - int d_key_position; - - internal_define_dest_src_infos (mode, tb, h, &dest_bi, &src_bi, &d_key_position, &cf); - - /*printk("pointer_amount = %d\n",pointer_amount);*/ - - if (pointer_amount) { - /* insert delimiting key from common father of dest and src to node dest into position B_NR_ITEM(dest) */ - internal_insert_key (&dest_bi, B_NR_ITEMS(dest_bi.bi_bh), cf, d_key_position); - - if (B_NR_ITEMS(src_bi.bi_bh) == pointer_amount - 1) { - if (src_bi.bi_position/*src->b_item_order*/ == 0) - replace_key (tb, cf, d_key_position, src_bi.bi_parent/*src->b_parent*/, 0); - } else - replace_key (tb, cf, d_key_position, src_bi.bi_bh, pointer_amount - 1); - } - /* last parameter is del_parameter */ - internal_move_pointers_items (&dest_bi, &src_bi, FIRST_TO_LAST, pointer_amount, 0); + struct buffer_info dest_bi, src_bi; + struct buffer_head *cf; + int d_key_position; + + internal_define_dest_src_infos(mode, tb, h, &dest_bi, &src_bi, + &d_key_position, &cf); + + /*printk("pointer_amount = %d\n",pointer_amount); */ + + if (pointer_amount) { + /* insert delimiting key from common father of dest and src to node dest into position B_NR_ITEM(dest) */ + internal_insert_key(&dest_bi, B_NR_ITEMS(dest_bi.bi_bh), cf, + d_key_position); + + if (B_NR_ITEMS(src_bi.bi_bh) == pointer_amount - 1) { + if (src_bi.bi_position /*src->b_item_order */ == 0) + replace_key(tb, cf, d_key_position, + src_bi. + bi_parent /*src->b_parent */ , 0); + } else + replace_key(tb, cf, d_key_position, src_bi.bi_bh, + pointer_amount - 1); + } + /* last parameter is del_parameter */ + internal_move_pointers_items(&dest_bi, &src_bi, FIRST_TO_LAST, + pointer_amount, 0); } @@ -493,67 +498,66 @@ static void internal_shift_left ( * Delete n - 1 items and node pointers from buffer S[h]. */ /* it always shifts from S[h] to L[h] */ -static void internal_shift1_left ( - struct tree_balance * tb, - int h, - int pointer_amount - ) +static void internal_shift1_left(struct tree_balance *tb, + int h, int pointer_amount) { - struct buffer_info dest_bi, src_bi; - struct buffer_head * cf; - int d_key_position; + struct buffer_info dest_bi, src_bi; + struct buffer_head *cf; + int d_key_position; - internal_define_dest_src_infos (INTERNAL_SHIFT_FROM_S_TO_L, tb, h, &dest_bi, &src_bi, &d_key_position, &cf); + internal_define_dest_src_infos(INTERNAL_SHIFT_FROM_S_TO_L, tb, h, + &dest_bi, &src_bi, &d_key_position, &cf); - if ( pointer_amount > 0 ) /* insert lkey[h]-th key from CFL[h] to left neighbor L[h] */ - internal_insert_key (&dest_bi, B_NR_ITEMS(dest_bi.bi_bh), cf, d_key_position); - /* internal_insert_key (tb->L[h], B_NR_ITEM(tb->L[h]), tb->CFL[h], tb->lkey[h]);*/ + if (pointer_amount > 0) /* insert lkey[h]-th key from CFL[h] to left neighbor L[h] */ + internal_insert_key(&dest_bi, B_NR_ITEMS(dest_bi.bi_bh), cf, + d_key_position); + /* internal_insert_key (tb->L[h], B_NR_ITEM(tb->L[h]), tb->CFL[h], tb->lkey[h]); */ - /* last parameter is del_parameter */ - internal_move_pointers_items (&dest_bi, &src_bi, FIRST_TO_LAST, pointer_amount, 1); - /* internal_move_pointers_items (tb->L[h], tb->S[h], FIRST_TO_LAST, pointer_amount, 1);*/ + /* last parameter is del_parameter */ + internal_move_pointers_items(&dest_bi, &src_bi, FIRST_TO_LAST, + pointer_amount, 1); + /* internal_move_pointers_items (tb->L[h], tb->S[h], FIRST_TO_LAST, pointer_amount, 1); */ } - /* Insert d_key'th (delimiting) key from buffer cfr to head of dest. * Copy n node pointers and n - 1 items from buffer src to buffer dest. * Replace d_key'th key in buffer cfr. * Delete n items and node pointers from buffer src. */ -static void internal_shift_right ( - int mode, /* INTERNAL_FROM_S_TO_R | INTERNAL_FROM_L_TO_S */ - struct tree_balance * tb, - int h, - int pointer_amount - ) +static void internal_shift_right(int mode, /* INTERNAL_FROM_S_TO_R | INTERNAL_FROM_L_TO_S */ + struct tree_balance *tb, + int h, int pointer_amount) { - struct buffer_info dest_bi, src_bi; - struct buffer_head * cf; - int d_key_position; - int nr; - - - internal_define_dest_src_infos (mode, tb, h, &dest_bi, &src_bi, &d_key_position, &cf); - - nr = B_NR_ITEMS (src_bi.bi_bh); - - if (pointer_amount > 0) { - /* insert delimiting key from common father of dest and src to dest node into position 0 */ - internal_insert_key (&dest_bi, 0, cf, d_key_position); - if (nr == pointer_amount - 1) { - RFALSE( src_bi.bi_bh != PATH_H_PBUFFER (tb->tb_path, h)/*tb->S[h]*/ || - dest_bi.bi_bh != tb->R[h], - "src (%p) must be == tb->S[h](%p) when it disappears", - src_bi.bi_bh, PATH_H_PBUFFER (tb->tb_path, h)); - /* when S[h] disappers replace left delemiting key as well */ - if (tb->CFL[h]) - replace_key (tb, cf, d_key_position, tb->CFL[h], tb->lkey[h]); - } else - replace_key (tb, cf, d_key_position, src_bi.bi_bh, nr - pointer_amount); - } - - /* last parameter is del_parameter */ - internal_move_pointers_items (&dest_bi, &src_bi, LAST_TO_FIRST, pointer_amount, 0); + struct buffer_info dest_bi, src_bi; + struct buffer_head *cf; + int d_key_position; + int nr; + + internal_define_dest_src_infos(mode, tb, h, &dest_bi, &src_bi, + &d_key_position, &cf); + + nr = B_NR_ITEMS(src_bi.bi_bh); + + if (pointer_amount > 0) { + /* insert delimiting key from common father of dest and src to dest node into position 0 */ + internal_insert_key(&dest_bi, 0, cf, d_key_position); + if (nr == pointer_amount - 1) { + RFALSE(src_bi.bi_bh != PATH_H_PBUFFER(tb->tb_path, h) /*tb->S[h] */ || + dest_bi.bi_bh != tb->R[h], + "src (%p) must be == tb->S[h](%p) when it disappears", + src_bi.bi_bh, PATH_H_PBUFFER(tb->tb_path, h)); |