diff options
Diffstat (limited to 'fs/reiserfs/lbalance.c')
| -rw-r--r-- | fs/reiserfs/lbalance.c | 2218 |
1 files changed, 1149 insertions, 1069 deletions
diff --git a/fs/reiserfs/lbalance.c b/fs/reiserfs/lbalance.c index 2406608fc5cd..2533c1f64aba 100644 --- a/fs/reiserfs/lbalance.c +++ b/fs/reiserfs/lbalance.c @@ -21,648 +21,709 @@ leaf_paste_entries */ - /* copy copy_count entries from source directory item to dest buffer (creating new item if needed) */ -static void leaf_copy_dir_entries (struct buffer_info * dest_bi, struct buffer_head * source, - int last_first, int item_num, int from, int copy_count) +static void leaf_copy_dir_entries(struct buffer_info *dest_bi, + struct buffer_head *source, int last_first, + int item_num, int from, int copy_count) { - struct buffer_head * dest = dest_bi->bi_bh; - int item_num_in_dest; /* either the number of target item, - or if we must create a new item, - the number of the item we will - create it next to */ - struct item_head * ih; - struct reiserfs_de_head * deh; - int copy_records_len; /* length of all records in item to be copied */ - char * records; - - ih = B_N_PITEM_HEAD (source, item_num); - - RFALSE( !is_direntry_le_ih (ih), "vs-10000: item must be directory item"); - - /* length of all record to be copied and first byte of the last of them */ - deh = B_I_DEH (source, ih); - if (copy_count) { - copy_records_len = (from ? deh_location( &(deh[from - 1]) ) : - ih_item_len(ih)) - deh_location( &(deh[from + copy_count - 1])); - records = source->b_data + ih_location(ih) + - deh_location( &(deh[from + copy_count - 1])); - } else { - copy_records_len = 0; - records = NULL; - } - - /* when copy last to first, dest buffer can contain 0 items */ - item_num_in_dest = (last_first == LAST_TO_FIRST) ? (( B_NR_ITEMS(dest) ) ? 0 : -1) : (B_NR_ITEMS(dest) - 1); - - /* if there are no items in dest or the first/last item in dest is not item of the same directory */ - if ( (item_num_in_dest == - 1) || - (last_first == FIRST_TO_LAST && le_ih_k_offset (ih) == DOT_OFFSET) || - (last_first == LAST_TO_FIRST && comp_short_le_keys/*COMP_SHORT_KEYS*/ (&ih->ih_key, B_N_PKEY (dest, item_num_in_dest)))) { - /* create new item in dest */ - struct item_head new_ih; - - /* form item header */ - memcpy (&new_ih.ih_key, &ih->ih_key, KEY_SIZE); - put_ih_version( &new_ih, KEY_FORMAT_3_5 ); - /* calculate item len */ - put_ih_item_len( &new_ih, DEH_SIZE * copy_count + copy_records_len ); - put_ih_entry_count( &new_ih, 0 ); - - if (last_first == LAST_TO_FIRST) { - /* form key by the following way */ - if (from < I_ENTRY_COUNT(ih)) { - set_le_ih_k_offset( &new_ih, deh_offset( &(deh[from]) ) ); - /*memcpy (&new_ih.ih_key.k_offset, &deh[from].deh_offset, SHORT_KEY_SIZE);*/ - } else { - /* no entries will be copied to this item in this function */ - set_le_ih_k_offset (&new_ih, U32_MAX); - /* this item is not yet valid, but we want I_IS_DIRECTORY_ITEM to return 1 for it, so we -1 */ - } - set_le_key_k_type (KEY_FORMAT_3_5, &(new_ih.ih_key), TYPE_DIRENTRY); + struct buffer_head *dest = dest_bi->bi_bh; + int item_num_in_dest; /* either the number of target item, + or if we must create a new item, + the number of the item we will + create it next to */ + struct item_head *ih; + struct reiserfs_de_head *deh; + int copy_records_len; /* length of all records in item to be copied */ + char *records; + + ih = B_N_PITEM_HEAD(source, item_num); + + RFALSE(!is_direntry_le_ih(ih), "vs-10000: item must be directory item"); + + /* length of all record to be copied and first byte of the last of them */ + deh = B_I_DEH(source, ih); + if (copy_count) { + copy_records_len = (from ? deh_location(&(deh[from - 1])) : + ih_item_len(ih)) - + deh_location(&(deh[from + copy_count - 1])); + records = + source->b_data + ih_location(ih) + + deh_location(&(deh[from + copy_count - 1])); + } else { + copy_records_len = 0; + records = NULL; + } + + /* when copy last to first, dest buffer can contain 0 items */ + item_num_in_dest = + (last_first == + LAST_TO_FIRST) ? ((B_NR_ITEMS(dest)) ? 0 : -1) : (B_NR_ITEMS(dest) + - 1); + + /* if there are no items in dest or the first/last item in dest is not item of the same directory */ + if ((item_num_in_dest == -1) || + (last_first == FIRST_TO_LAST && le_ih_k_offset(ih) == DOT_OFFSET) || + (last_first == LAST_TO_FIRST + && comp_short_le_keys /*COMP_SHORT_KEYS */ (&ih->ih_key, + B_N_PKEY(dest, + item_num_in_dest)))) + { + /* create new item in dest */ + struct item_head new_ih; + + /* form item header */ + memcpy(&new_ih.ih_key, &ih->ih_key, KEY_SIZE); + put_ih_version(&new_ih, KEY_FORMAT_3_5); + /* calculate item len */ + put_ih_item_len(&new_ih, + DEH_SIZE * copy_count + copy_records_len); + put_ih_entry_count(&new_ih, 0); + + if (last_first == LAST_TO_FIRST) { + /* form key by the following way */ + if (from < I_ENTRY_COUNT(ih)) { + set_le_ih_k_offset(&new_ih, + deh_offset(&(deh[from]))); + /*memcpy (&new_ih.ih_key.k_offset, &deh[from].deh_offset, SHORT_KEY_SIZE); */ + } else { + /* no entries will be copied to this item in this function */ + set_le_ih_k_offset(&new_ih, U32_MAX); + /* this item is not yet valid, but we want I_IS_DIRECTORY_ITEM to return 1 for it, so we -1 */ + } + set_le_key_k_type(KEY_FORMAT_3_5, &(new_ih.ih_key), + TYPE_DIRENTRY); + } + + /* insert item into dest buffer */ + leaf_insert_into_buf(dest_bi, + (last_first == + LAST_TO_FIRST) ? 0 : B_NR_ITEMS(dest), + &new_ih, NULL, 0); + } else { + /* prepare space for entries */ + leaf_paste_in_buffer(dest_bi, + (last_first == + FIRST_TO_LAST) ? (B_NR_ITEMS(dest) - + 1) : 0, MAX_US_INT, + DEH_SIZE * copy_count + copy_records_len, + records, 0); } - - /* insert item into dest buffer */ - leaf_insert_into_buf (dest_bi, (last_first == LAST_TO_FIRST) ? 0 : B_NR_ITEMS(dest), &new_ih, NULL, 0); - } else { - /* prepare space for entries */ - leaf_paste_in_buffer (dest_bi, (last_first==FIRST_TO_LAST) ? (B_NR_ITEMS(dest) - 1) : 0, MAX_US_INT, - DEH_SIZE * copy_count + copy_records_len, records, 0 - ); - } - - item_num_in_dest = (last_first == FIRST_TO_LAST) ? (B_NR_ITEMS(dest)-1) : 0; - - leaf_paste_entries (dest_bi->bi_bh, item_num_in_dest, - (last_first == FIRST_TO_LAST) ? I_ENTRY_COUNT(B_N_PITEM_HEAD (dest, item_num_in_dest)) : 0, - copy_count, deh + from, records, - DEH_SIZE * copy_count + copy_records_len - ); -} + item_num_in_dest = + (last_first == FIRST_TO_LAST) ? (B_NR_ITEMS(dest) - 1) : 0; + + leaf_paste_entries(dest_bi->bi_bh, item_num_in_dest, + (last_first == + FIRST_TO_LAST) ? I_ENTRY_COUNT(B_N_PITEM_HEAD(dest, + item_num_in_dest)) + : 0, copy_count, deh + from, records, + DEH_SIZE * copy_count + copy_records_len); +} /* Copy the first (if last_first == FIRST_TO_LAST) or last (last_first == LAST_TO_FIRST) item or part of it or nothing (see the return 0 below) from SOURCE to the end (if last_first) or beginning (!last_first) of the DEST */ /* returns 1 if anything was copied, else 0 */ -static int leaf_copy_boundary_item (struct buffer_info * dest_bi, struct buffer_head * src, int last_first, - int bytes_or_entries) +static int leaf_copy_boundary_item(struct buffer_info *dest_bi, + struct buffer_head *src, int last_first, + int bytes_or_entries) { - struct buffer_head * dest = dest_bi->bi_bh; - int dest_nr_item, src_nr_item; /* number of items in the source and destination buffers */ - struct item_head * ih; - struct item_head * dih; - - dest_nr_item = B_NR_ITEMS(dest); - - if ( last_first == FIRST_TO_LAST ) { - /* if ( DEST is empty or first item of SOURCE and last item of DEST are the items of different objects - or of different types ) then there is no need to treat this item differently from the other items - that we copy, so we return */ - ih = B_N_PITEM_HEAD (src, 0); - dih = B_N_PITEM_HEAD (dest, dest_nr_item - 1); - if (!dest_nr_item || (!op_is_left_mergeable (&(ih->ih_key), src->b_size))) - /* there is nothing to merge */ - return 0; - - RFALSE( ! ih_item_len(ih), "vs-10010: item can not have empty length"); - - if ( is_direntry_le_ih (ih) ) { - if ( bytes_or_entries == -1 ) - /* copy all entries to dest */ - bytes_or_entries = ih_entry_count(ih); - leaf_copy_dir_entries (dest_bi, src, FIRST_TO_LAST, 0, 0, bytes_or_entries); - return 1; - } - - /* copy part of the body of the first item of SOURCE to the end of the body of the last item of the DEST - part defined by 'bytes_or_entries'; if bytes_or_entries == -1 copy whole body; don't create new item header - */ - if ( bytes_or_entries == -1 ) - bytes_or_entries = ih_item_len(ih); + struct buffer_head *dest = dest_bi->bi_bh; + int dest_nr_item, src_nr_item; /* number of items in the source and destination buffers */ + struct item_head *ih; + struct item_head *dih; + + dest_nr_item = B_NR_ITEMS(dest); + + if (last_first == FIRST_TO_LAST) { + /* if ( DEST is empty or first item of SOURCE and last item of DEST are the items of different objects + or of different types ) then there is no need to treat this item differently from the other items + that we copy, so we return */ + ih = B_N_PITEM_HEAD(src, 0); + dih = B_N_PITEM_HEAD(dest, dest_nr_item - 1); + if (!dest_nr_item + || (!op_is_left_mergeable(&(ih->ih_key), src->b_size))) + /* there is nothing to merge */ + return 0; + + RFALSE(!ih_item_len(ih), + "vs-10010: item can not have empty length"); + + if (is_direntry_le_ih(ih)) { + if (bytes_or_entries == -1) + /* copy all entries to dest */ + bytes_or_entries = ih_entry_count(ih); + leaf_copy_dir_entries(dest_bi, src, FIRST_TO_LAST, 0, 0, + bytes_or_entries); + return 1; + } + + /* copy part of the body of the first item of SOURCE to the end of the body of the last item of the DEST + part defined by 'bytes_or_entries'; if bytes_or_entries == -1 copy whole body; don't create new item header + */ + if (bytes_or_entries == -1) + bytes_or_entries = ih_item_len(ih); #ifdef CONFIG_REISERFS_CHECK - else { - if (bytes_or_entries == ih_item_len(ih) && is_indirect_le_ih(ih)) - if (get_ih_free_space (ih)) - reiserfs_panic (NULL, "vs-10020: leaf_copy_boundary_item: " - "last unformatted node must be filled entirely (%h)", - ih); - } + else { + if (bytes_or_entries == ih_item_len(ih) + && is_indirect_le_ih(ih)) + if (get_ih_free_space(ih)) + reiserfs_panic(NULL, + "vs-10020: leaf_copy_boundary_item: " + "last unformatted node must be filled entirely (%h)", + ih); + } #endif - - /* merge first item (or its part) of src buffer with the last - item of dest buffer. Both are of the same file */ - leaf_paste_in_buffer (dest_bi, - dest_nr_item - 1, ih_item_len(dih), bytes_or_entries, B_I_PITEM(src,ih), 0 - ); - - if (is_indirect_le_ih (dih)) { - RFALSE( get_ih_free_space (dih), - "vs-10030: merge to left: last unformatted node of non-last indirect item %h must have zerto free space", - ih); - if (bytes_or_entries == ih_item_len(ih)) - set_ih_free_space (dih, get_ih_free_space (ih)); - } - - return 1; - } - - - /* copy boundary item to right (last_first == LAST_TO_FIRST) */ - - /* ( DEST is empty or last item of SOURCE and first item of DEST - are the items of different object or of different types ) - */ - src_nr_item = B_NR_ITEMS (src); - ih = B_N_PITEM_HEAD (src, src_nr_item - 1); - dih = B_N_PITEM_HEAD (dest, 0); - - if (!dest_nr_item || !op_is_left_mergeable (&(dih->ih_key), src->b_size)) - return 0; - - if ( is_direntry_le_ih (ih)) { - if ( bytes_or_entries == -1 ) - /* bytes_or_entries = entries number in last item body of SOURCE */ - bytes_or_entries = ih_entry_count(ih); - - leaf_copy_dir_entries (dest_bi, src, LAST_TO_FIRST, src_nr_item - 1, ih_entry_count(ih) - bytes_or_entries, bytes_or_entries); - return 1; - } - - /* copy part of the body of the last item of SOURCE to the begin of the body of the first item of the DEST; - part defined by 'bytes_or_entries'; if byte_or_entriess == -1 copy whole body; change first item key of the DEST; - don't create new item header - */ - - RFALSE( is_indirect_le_ih(ih) && get_ih_free_space (ih), - "vs-10040: merge to right: last unformatted node of non-last indirect item must be filled entirely (%h)", - ih); - - if ( bytes_or_entries == -1 ) { - /* bytes_or_entries = length of last item body of SOURCE */ - bytes_or_entries = ih_item_len(ih); - - RFALSE( le_ih_k_offset (dih) != - le_ih_k_offset (ih) + op_bytes_number (ih, src->b_size), - "vs-10050: items %h and %h do not match", ih, dih); - - /* change first item key of the DEST */ - set_le_ih_k_offset (dih, le_ih_k_offset (ih)); - - /* item becomes non-mergeable */ - /* or mergeable if left item was */ - set_le_ih_k_type (dih, le_ih_k_type (ih)); - } else { - /* merge to right only part of item */ - RFALSE( ih_item_len(ih) <= bytes_or_entries, - "vs-10060: no so much bytes %lu (needed %lu)", - ( unsigned long )ih_item_len(ih), ( unsigned long )bytes_or_entries); - - /* change first item key of the DEST */ - if ( is_direct_le_ih (dih) ) { - RFALSE( le_ih_k_offset (dih) <= (unsigned long)bytes_or_entries, - "vs-10070: dih %h, bytes_or_entries(%d)", dih, bytes_or_entries); - set_le_ih_k_offset (dih, le_ih_k_offset (dih) - bytes_or_entries); - } else { - RFALSE( le_ih_k_offset (dih) <= - (bytes_or_entries / UNFM_P_SIZE) * dest->b_size, - "vs-10080: dih %h, bytes_or_entries(%d)", - dih, (bytes_or_entries/UNFM_P_SIZE)*dest->b_size); - set_le_ih_k_offset (dih, le_ih_k_offset (dih) - ((bytes_or_entries / UNFM_P_SIZE) * dest->b_size)); - } - } - - leaf_paste_in_buffer (dest_bi, 0, 0, bytes_or_entries, B_I_PITEM(src,ih) + ih_item_len(ih) - bytes_or_entries, 0); - return 1; -} + /* merge first item (or its part) of src buffer with the last + item of dest buffer. Both are of the same file */ + leaf_paste_in_buffer(dest_bi, + dest_nr_item - 1, ih_item_len(dih), + bytes_or_entries, B_I_PITEM(src, ih), 0); + + if (is_indirect_le_ih(dih)) { + RFALSE(get_ih_free_space(dih), + "vs-10030: merge to left: last unformatted node of non-last indirect item %h must have zerto free space", + ih); + if (bytes_or_entries == ih_item_len(ih)) + set_ih_free_space(dih, get_ih_free_space(ih)); + } + + return 1; + } + + /* copy boundary item to right (last_first == LAST_TO_FIRST) */ + + /* ( DEST is empty or last item of SOURCE and first item of DEST + are the items of different object or of different types ) + */ + src_nr_item = B_NR_ITEMS(src); + ih = B_N_PITEM_HEAD(src, src_nr_item - 1); + dih = B_N_PITEM_HEAD(dest, 0); + + if (!dest_nr_item || !op_is_left_mergeable(&(dih->ih_key), src->b_size)) + return 0; + + if (is_direntry_le_ih(ih)) { + if (bytes_or_entries == -1) + /* bytes_or_entries = entries number in last item body of SOURCE */ + bytes_or_entries = ih_entry_count(ih); + + leaf_copy_dir_entries(dest_bi, src, LAST_TO_FIRST, + src_nr_item - 1, + ih_entry_count(ih) - bytes_or_entries, + bytes_or_entries); + return 1; + } + + /* copy part of the body of the last item of SOURCE to the begin of the body of the first item of the DEST; + part defined by 'bytes_or_entries'; if byte_or_entriess == -1 copy whole body; change first item key of the DEST; + don't create new item header + */ + + RFALSE(is_indirect_le_ih(ih) && get_ih_free_space(ih), + "vs-10040: merge to right: last unformatted node of non-last indirect item must be filled entirely (%h)", + ih); + + if (bytes_or_entries == -1) { + /* bytes_or_entries = length of last item body of SOURCE */ + bytes_or_entries = ih_item_len(ih); + + RFALSE(le_ih_k_offset(dih) != + le_ih_k_offset(ih) + op_bytes_number(ih, src->b_size), + "vs-10050: items %h and %h do not match", ih, dih); + + /* change first item key of the DEST */ + set_le_ih_k_offset(dih, le_ih_k_offset(ih)); + + /* item becomes non-mergeable */ + /* or mergeable if left item was */ + set_le_ih_k_type(dih, le_ih_k_type(ih)); + } else { + /* merge to right only part of item */ + RFALSE(ih_item_len(ih) <= bytes_or_entries, + "vs-10060: no so much bytes %lu (needed %lu)", + (unsigned long)ih_item_len(ih), + (unsigned long)bytes_or_entries); + + /* change first item key of the DEST */ + if (is_direct_le_ih(dih)) { + RFALSE(le_ih_k_offset(dih) <= + (unsigned long)bytes_or_entries, + "vs-10070: dih %h, bytes_or_entries(%d)", dih, + bytes_or_entries); + set_le_ih_k_offset(dih, + le_ih_k_offset(dih) - + bytes_or_entries); + } else { + RFALSE(le_ih_k_offset(dih) <= + (bytes_or_entries / UNFM_P_SIZE) * dest->b_size, + "vs-10080: dih %h, bytes_or_entries(%d)", + dih, + (bytes_or_entries / UNFM_P_SIZE) * dest->b_size); + set_le_ih_k_offset(dih, + le_ih_k_offset(dih) - + ((bytes_or_entries / UNFM_P_SIZE) * + dest->b_size)); + } + } + + leaf_paste_in_buffer(dest_bi, 0, 0, bytes_or_entries, + B_I_PITEM(src, + ih) + ih_item_len(ih) - bytes_or_entries, + 0); + return 1; +} /* copy cpy_mun items from buffer src to buffer dest * last_first == FIRST_TO_LAST means, that we copy cpy_num items beginning from first-th item in src to tail of dest * last_first == LAST_TO_FIRST means, that we copy cpy_num items beginning from first-th item in src to head of dest */ -static void leaf_copy_items_entirely (struct buffer_info * dest_bi, struct buffer_head * src, int last_first, - int first, int cpy_num) +static void leaf_copy_items_entirely(struct buffer_info *dest_bi, + struct buffer_head *src, int last_first, + int first, int cpy_num) { - struct buffer_head * dest; - int nr, free_space; - int dest_before; - int last_loc, last_inserted_loc, location; - int i, j; - struct block_head * blkh; - struct item_head * ih; - - RFALSE( last_first != LAST_TO_FIRST && last_first != FIRST_TO_LAST, - "vs-10090: bad last_first parameter %d", last_first); - RFALSE( B_NR_ITEMS (src) - first < cpy_num, - "vs-10100: too few items in source %d, required %d from %d", - B_NR_ITEMS(src), cpy_num, first); - RFALSE( cpy_num < 0, "vs-10110: can not copy negative amount of items"); - RFALSE( ! dest_bi, "vs-10120: can not copy negative amount of items"); - - dest = dest_bi->bi_bh; - - RFALSE( ! dest, "vs-10130: can not copy negative amount of items"); - - if (cpy_num == 0) - return; - - blkh = B_BLK_HEAD(dest); - nr = blkh_nr_item( blkh ); - free_space = blkh_free_space(blkh); - - /* we will insert items before 0-th or nr-th item in dest buffer. It depends of last_first parameter */ - dest_before = (last_first == LAST_TO_FIRST) ? 0 : nr; - - /* location of head of first new item */ - ih = B_N_PITEM_HEAD (dest, dest_before); - - RFALSE( blkh_free_space(blkh) < cpy_num * IH_SIZE, - "vs-10140: not enough free space for headers %d (needed %d)", - B_FREE_SPACE (dest), cpy_num * IH_SIZE); - - /* prepare space for headers */ - memmove (ih + cpy_num, ih, (nr-dest_before) * IH_SIZE); - - /* copy item headers */ - memcpy (ih, B_N_PITEM_HEAD (src, first), cpy_num * IH_SIZE); - - free_space -= (IH_SIZE * cpy_num); - set_blkh_free_space( blkh, free_space ); - - /* location of unmovable item */ - j = location = (dest_before == 0) ? dest->b_size : ih_location(ih-1); - for (i = dest_before; i < nr + cpy_num; i ++) { - location -= ih_item_len( ih + i - dest_before ); - put_ih_location( ih + i - dest_before, location ); - } - - /* prepare space for items */ - last_loc = ih_location( &(ih[nr+cpy_num-1-dest_before]) ); - last_inserted_loc = ih_location( &(ih[cpy_num-1]) ); - - /* check free space */ - RFALSE( free_space < j - last_inserted_loc, - "vs-10150: not enough free space for items %d (needed %d)", - free_space, j - last_inserted_loc); - - memmove (dest->b_data + last_loc, - dest->b_data + last_loc + j - last_inserted_loc, - last_inserted_loc - last_loc); - - /* copy items */ - memcpy (dest->b_data + last_inserted_loc, B_N_PITEM(src,(first + cpy_num - 1)), - j - last_inserted_loc); - - /* sizes, item number */ - set_blkh_nr_item( blkh, nr + cpy_num ); - set_blkh_free_space( blkh, free_space - (j - last_inserted_loc) ); - - do_balance_mark_leaf_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); - RFALSE( dc_block_number(t_dc) != dest->b_blocknr, - "vs-10160: block number in bh does not match to field in disk_child structure %lu and %lu", - ( long unsigned ) dest->b_blocknr, - ( long unsigned ) dc_block_number(t_dc)); - put_dc_size( t_dc, dc_size(t_dc) + (j - last_inserted_loc + IH_SIZE * cpy_num ) ); - - do_balance_mark_internal_dirty (dest_bi->tb, dest_bi->bi_parent, 0); - } -} + struct buffer_head *dest; + int nr, free_space; + int dest_before; + int last_loc, last_inserted_loc, location; + int i, j; + struct block_head *blkh; + struct item_head *ih; + + RFALSE(last_first != LAST_TO_FIRST && last_first != FIRST_TO_LAST, + "vs-10090: bad last_first parameter %d", last_first); + RFALSE(B_NR_ITEMS(src) - first < cpy_num, + "vs-10100: too few items in source %d, required %d from %d", + B_NR_ITEMS(src), cpy_num, first); + RFALSE(cpy_num < 0, "vs-10110: can not copy negative amount of items"); + RFALSE(!dest_bi, "vs-10120: can not copy negative amount of items"); + + dest = dest_bi->bi_bh; + + RFALSE(!dest, "vs-10130: can not copy negative amount of items"); + + if (cpy_num == 0) + return; + + blkh = B_BLK_HEAD(dest); + nr = blkh_nr_item(blkh); + free_space = blkh_free_space(blkh); + + /* we will insert items before 0-th or nr-th item in dest buffer. It depends of last_first parameter */ + dest_before = (last_first == LAST_TO_FIRST) ? 0 : nr; + + /* location of head of first new item */ + ih = B_N_PITEM_HEAD(dest, dest_before); + + RFALSE(blkh_free_space(blkh) < cpy_num * IH_SIZE, + "vs-10140: not enough free space for headers %d (needed %d)", + B_FREE_SPACE(dest), cpy_num * IH_SIZE); + + /* prepare space for headers */ + memmove(ih + cpy_num, ih, (nr - dest_before) * IH_SIZE); + /* copy item headers */ + memcpy(ih, B_N_PITEM_HEAD(src, first), cpy_num * IH_SIZE); + + free_space -= (IH_SIZE * cpy_num); + set_blkh_free_space(blkh, free_space); + + /* location of unmovable item */ + j = location = (dest_before == 0) ? dest->b_size : ih_location(ih - 1); + for (i = dest_before; i < nr + cpy_num; i++) { + location -= ih_item_len(ih + i - dest_before); + put_ih_location(ih + i - dest_before, location); + } + + /* prepare space for items */ + last_loc = ih_location(&(ih[nr + cpy_num - 1 - dest_before])); + last_inserted_loc = ih_location(&(ih[cpy_num - 1])); + + /* check free space */ + RFALSE(free_space < j - last_inserted_loc, + "vs-10150: not enough free space for items %d (needed %d)", + free_space, j - last_inserted_loc); + + memmove(dest->b_data + last_loc, + dest->b_data + last_loc + j - last_inserted_loc, + last_inserted_loc - last_loc); + + /* copy items */ + memcpy(dest->b_data + last_inserted_loc, + B_N_PITEM(src, (first + cpy_num - 1)), j - last_inserted_loc); + + /* sizes, item number */ + set_blkh_nr_item(blkh, nr + cpy_num); + set_blkh_free_space(blkh, free_space - (j - last_inserted_loc)); + + do_balance_mark_leaf_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); + RFALSE(dc_block_number(t_dc) != dest->b_blocknr, + "vs-10160: block number in bh does not match to field in disk_child structure %lu and %lu", + (long unsigned)dest->b_blocknr, + (long unsigned)dc_block_number(t_dc)); + put_dc_size(t_dc, + dc_size(t_dc) + (j - last_inserted_loc + + IH_SIZE * cpy_num)); + + do_balance_mark_internal_dirty(dest_bi->tb, dest_bi->bi_parent, + 0); + } +} /* This function splits the (liquid) item into two items (useful when shifting part of an item into another node.) */ -static void leaf_item_bottle (struct buffer_info * dest_bi, struct buffer_head * src, int last_first, - int item_num, int cpy_bytes) +static void leaf_item_bottle(struct buffer_info *dest_bi, + struct buffer_head *src, int last_first, + int item_num, int cpy_bytes) { - struct buffer_head * dest = dest_bi->bi_bh; - struct item_head * ih; - - RFALSE( cpy_bytes == -1, "vs-10170: bytes == - 1 means: do not split item"); - - if ( last_first == FIRST_TO_LAST ) { - /* if ( if item in position item_num in buffer SOURCE is directory item ) */ - if (is_direntry_le_ih (ih = B_N_PITEM_HEAD(src,item_num))) - leaf_copy_dir_entries (dest_bi, src, FIRST_TO_LAST, item_num, 0, cpy_bytes); - else { - struct item_head n_ih; - - /* copy part of the body of the item number 'item_num' of SOURCE to the end of the DEST - part defined by 'cpy_bytes'; create new item header; change old item_header (????); - n_ih = new item_header; - */ - memcpy (&n_ih, ih, IH_SIZE); - put_ih_item_len( &n_ih, cpy_bytes ); - if (is_indirect_le_ih (ih)) { - RFALSE( cpy_bytes == ih_item_len(ih) && get_ih_free_space(ih), - "vs-10180: when whole indirect item is bottle to left neighbor, it must have free_space==0 (not %lu)", - ( long unsigned ) get_ih_free_space (ih)); - set_ih_free_space (&n_ih, 0); - } - - RFALSE( op_is_left_mergeable (&(ih->ih_key), src->b_size), - "vs-10190: bad mergeability of item %h", ih); - n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */ - leaf_insert_into_buf (dest_bi, B_NR_ITEMS(dest), &n_ih, B_N_PITEM (src, item_num), 0); + struct buffer_head *dest = dest_bi->bi_bh; + struct item_head *ih; + + RFALSE(cpy_bytes == -1, + "vs-10170: bytes == - 1 means: do not split item"); + + if (last_first == FIRST_TO_LAST) { + /* if ( if item in position item_num in buffer SOURCE is directory item ) */ + if (is_direntry_le_ih(ih = B_N_PITEM_HEAD(src, item_num))) + leaf_copy_dir_entries(dest_bi, src, FIRST_TO_LAST, + item_num, 0, cpy_bytes); + else { + struct item_head n_ih; + + /* copy part of the body of the item number 'item_num' of SOURCE to the end of the DEST + part defined by 'cpy_bytes'; create new item header; change old item_header (????); + n_ih = new item_header; + */ + memcpy(&n_ih, ih, IH_SIZE); + put_ih_item_len(&n_ih, cpy_bytes); + if (is_indirect_le_ih(ih)) { + RFALSE(cpy_bytes == ih_item_len(ih) + && get_ih_free_space(ih), + "vs-10180: when whole indirect item is bottle to left neighbor, it must have free_space==0 (not %lu)", + (long unsigned)get_ih_free_space(ih)); + set_ih_free_space(&n_ih, 0); + } + + RFALSE(op_is_left_mergeable(&(ih->ih_key), src->b_size), + "vs-10190: bad mergeability of item %h", ih); + n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */ + leaf_insert_into_buf(dest_bi, B_NR_ITEMS(dest), &n_ih, + B_N_PITEM(src, item_num), 0); + } + } else { + /* if ( if item in position item_num in buffer SOURCE is directory item ) */ + if (is_direntry_le_ih(ih = B_N_PITEM_HEAD(src, item_num))) + leaf_copy_dir_entries(dest_bi, src, LAST_TO_FIRST, + item_num, + I_ENTRY_COUNT(ih) - cpy_bytes, + cpy_bytes); + else { + struct item_head n_ih; + + /* copy part of the body of the item number 'item_num' of SOURCE to the begin of the DEST + part defined by 'cpy_bytes'; create new item header; + n_ih = new item_header; + */ + memcpy(&n_ih, ih, SHORT_KEY_SIZE); + + n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */ + + if (is_direct_le_ih(ih)) { + set_le_ih_k_offset(&n_ih, + le_ih_k_offset(ih) + + ih_item_len(ih) - cpy_bytes); + set_le_ih_k_type(&n_ih, TYPE_DIRECT); + set_ih_free_space(&n_ih, MAX_US_INT); + } else { + /* indirect item */ + RFALSE(!cpy_bytes && get_ih_free_space(ih), + "vs-10200: ih->ih_free_space must be 0 when indirect item will be appended"); + set_le_ih_k_offset(&n_ih, + le_ih_k_offset(ih) + + (ih_item_len(ih) - + cpy_bytes) / UNFM_P_SIZE * + dest->b_size); + set_le_ih_k_type(&n_ih, TYPE_INDIRECT); + set_ih_free_space(&n_ih, get_ih_free_space(ih)); + } + + /* set item length */ + put_ih_item_len(&n_ih, cpy_bytes); + + n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */ + + leaf_insert_into_buf(dest_bi, 0, &n_ih, + B_N_PITEM(src, + item_num) + + ih_item_len(ih) - cpy_bytes, 0); + } } - } else { - /* if ( if item in position item_num in buffer SOURCE is directory item ) */ - if (is_direntry_le_ih(ih = B_N_PITEM_HEAD (src, item_num))) - leaf_copy_dir_entries (dest_bi, src, LAST_TO_FIRST, item_num, I_ENTRY_COUNT(ih) - cpy_bytes, cpy_bytes); - else { - struct item_head n_ih; - - /* copy part of the body of the item number 'item_num' of SOURCE to the begin of the DEST - part defined by 'cpy_bytes'; create new item header; - n_ih = new item_header; - */ - memcpy (&n_ih, ih, SHORT_KEY_SIZE); - - n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */ - - if (is_direct_le_ih (ih)) { - set_le_ih_k_offset (&n_ih, le_ih_k_offset (ih) + ih_item_len(ih) - cpy_bytes); - set_le_ih_k_type (&n_ih, TYPE_DIRECT); - set_ih_free_space (&n_ih, MAX_US_INT); - } else { - /* indirect item */ - RFALSE( !cpy_bytes && get_ih_free_space (ih), - "vs-10200: ih->ih_free_space must be 0 when indirect item will be appended"); - set_le_ih_k_offset (&n_ih, le_ih_k_offset (ih) + (ih_item_len(ih) - cpy_bytes) / UNFM_P_SIZE * dest->b_size); - set_le_ih_k_type (&n_ih, TYPE_INDIRECT); - set_ih_free_space (&n_ih, get_ih_free_space (ih)); - } - - /* set item length */ - put_ih_item_len( &n_ih, cpy_bytes ); - - n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */ - - leaf_insert_into_buf (dest_bi, 0, &n_ih, B_N_PITEM(src,item_num) + ih_item_len(ih) - cpy_bytes, 0); - } - } } - /* If cpy_bytes equals minus one than copy cpy_num whole items from SOURCE to DEST. If cpy_bytes not equal to minus one than copy cpy_num-1 whole items from SOURCE to DEST. From last item copy cpy_num bytes for regular item and cpy_num directory entries for directory item. */ -static int leaf_copy_items (struct buffer_info * dest_bi, struct buffer_head * src, int last_first, int cpy_num, - int cpy_bytes) +static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src, + int last_first, int cpy_num, int cpy_bytes) { - struct buffer_head * dest; - int pos, i, src_nr_item, bytes; - - dest = dest_bi->bi_bh; - RFALSE( !dest || !src, "vs-10210: !dest || !src"); - RFALSE( last_first != FIRST_TO_LAST && last_first != LAST_TO_FIRST, - "vs-10220:last_first != FIRST_TO_LAST && last_first != LAST_TO_FIRST"); - RFALSE( B_NR_ITEMS(src) < cpy_num, - "vs-10230: No enough items: %d, req. %d", B_NR_ITEMS(src), cpy_num); - RFALSE( cpy_num < 0,"vs-10240: cpy_num < 0 (%d)", cpy_num); - - if ( cpy_num == 0 ) - return 0; - - if ( last_first == FIRST_TO_LAST ) { - /* copy items to left */ - pos = 0; - if ( cpy_num == 1 ) - bytes = cpy_bytes; - else - bytes = -1; - - /* copy the first item or it part or nothing to the end of the DEST (i = leaf_copy_boundary_item(DEST,SOURCE,0,bytes)) */ - i = leaf_copy_boundary_item (dest_bi, src, FIRST_TO_LAST, bytes); - cpy_num -= i; - if ( cpy_num == 0 ) - return i; - pos += i; - if ( cpy_bytes == -1 ) - /* copy first cpy_num items starting from position 'pos' of SOURCE to end of DEST */ - leaf_copy_items_entirely (dest_bi, src, FIRST_TO_LAST, pos, cpy_num); - else { - /* copy first cpy_num-1 items starting from position 'pos-1' of the SOURCE to the end of the DEST */ - leaf_copy_items_entirely (dest_bi, src, FIRST_TO_LAST, pos, cpy_num-1); - - /* copy part of the item which number is cpy_num+pos-1 to the end of the DEST */ - leaf_item_bottle (dest_bi, src, FIRST_TO_LAST, cpy_num+pos-1, cpy_bytes); - } - } else { - /* copy items to right */ - src_nr_item = B_NR_ITEMS (src); - if ( cpy_num == 1 ) - bytes = cpy_bytes; - else - bytes = -1; - - /* copy the last item or it part or nothing to the begin of the DEST (i = leaf_copy_boundary_item(DEST,SOURCE,1,bytes)); */ - i = leaf_copy_boundary_item (dest_bi, src, LAST_TO_FIRST, bytes); - - cpy_num -= i; - if ( cpy_num == 0 ) - return i; - - pos = src_nr_item - cpy_num - i; - if ( cpy_bytes == -1 ) { - /* starting from position 'pos' copy last cpy_num items of SOURCE to begin of DEST */ - leaf_copy_items_entirely (dest_bi, src, LAST_TO_FIRST, pos, cpy_num); - } else { - /* copy last cpy_num-1 items starting from position 'pos+1' of the SOURCE to the begin of the DEST; */ - leaf_copy_items_entirely (dest_bi, src, LAST_TO_FIRST, pos+1, cpy_num-1); - - /* copy part of the item which number is pos to the begin of the DEST */ - leaf_item_bottle (dest_bi, src, LAST_TO_FIRST, pos, cpy_bytes); - } - } - return i; + struct buffer_head *dest; + int pos, i, src_nr_item, bytes; + + dest = dest_bi->bi_bh; + RFALSE(!dest || !src, "vs-10210: !dest || !src"); + RFALSE(last_first != FIRST_TO_LAST && last_first != LAST_TO_FIRST, + "vs-10220:last_first != FIRST_TO_LAST && last_first != LAST_TO_FIRST"); + RFALSE(B_NR_ITEMS(src) < cpy_num, + "vs-10230: No enough items: %d, req. %d", B_NR_ITEMS(src), + cpy_num); + RFALSE(cpy_num < 0, "vs-10240: cpy_num < 0 (%d)", cpy_num); + + if (cpy_num == 0) + return 0; + + if (last_first == FIRST_TO_LAST) { + /* copy items to left */ + pos = 0; + if (cpy_num == 1) + bytes = cpy_bytes; + else + bytes = -1; + + /* copy the first item or it part or nothing to the end of the DEST (i = leaf_copy_boundary_item(DEST,SOURCE,0,bytes)) */ + i = leaf_copy_boundary_item(dest_bi, src, FIRST_TO_LAST, bytes); + cpy_num -= i; + if (cpy_num == 0) + return i; + pos += i; + if (cpy_bytes == -1) + /* copy first cpy_num items starting from position 'pos' of SOURCE to end of DEST */ + leaf_copy_items_entirely(dest_bi, src, FIRST_TO_LAST, + pos, cpy_num); + else { + /* copy first cpy_num-1 items starting from position 'pos-1' of the SOURCE to the end of the DEST */ + leaf_copy_items_entirely(dest_bi, src, FIRST_TO_LAST, + pos, cpy_num - 1); + + /* copy part of the item which number is cpy_num+pos-1 to the end of the DEST */ + leaf_item_bottle(dest_bi, src, FIRST_TO_LAST, + cpy_num + pos - 1, cpy_bytes); + } + } else { + /* copy items to right */ + src_nr_item = B_NR_ITEMS(src); + if (cpy_num == 1) + bytes = cpy_bytes; + else + bytes = -1; + + /* copy the last item or it part or nothing to the begin of the DEST (i = leaf_copy_boundary_item(DEST,SOURCE,1,bytes)); */ + i = leaf_copy_boundary_item(dest_bi, src, LAST_TO_FIRST, bytes); + + cpy_num -= i; + if (cpy_num == 0) + return i; + + pos = src_nr_item - cpy_num - i; + if (cpy_bytes == -1) { + /* starting from position 'pos' copy last cpy_num items of SOURCE to begin of DEST */ + leaf_copy_items_entirely(dest_bi, src, LAST_TO_FIRST, + pos, cpy_num); + } else { + /* copy last cpy_num-1 items starting from position 'pos+1' of the SOURCE to the begin of the DEST; */ + leaf_copy_items_entirely(dest_bi, src, LAST_TO_FIRST, + pos + 1, cpy_num - 1); + + /* copy part of the item which number is pos to the begin of the DEST */ + leaf_item_bottle(dest_bi, src, LAST_TO_FIRST, pos, + cpy_bytes); + } + } + return i; } - /* there are types of coping: from S[0] to L[0], from S[0] to R[0], from R[0] to L[0]. for each of these we have to define parent and positions of destination and source buffers */ -static void leaf_define_dest_src_infos (int shift_mode, struct tree_balance * tb, struct buffer_info * dest_bi, - struct buffer_info * src_bi, int * first_last, - struct buffer_head * Snew) +static void leaf_define_dest_src_infos(int shift_mode, struct tree_balance *tb, + struct buffer_info *dest_bi, + struct buffer_info *src_bi, + int *first_last, + struct buffer_head *Snew) { - 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 LEAF_FROM_S_TO_L: /* it is used in leaf_shift_left */ - src_bi->tb = tb; - src_bi->bi_bh = PATH_PLAST_BUFFER (tb->tb_path); - src_bi->bi_parent = PATH_H_PPARENT (tb->tb_path, 0); - src_bi->bi_position = PATH_H_B_ITEM_ORDER (tb->tb_path, 0); /* src->b_item_order */ - dest_bi->tb = tb; - dest_bi->bi_bh = tb->L[0]; - dest_bi->bi_parent = tb->FL[0]; - dest_bi->bi_position = get_left_neighbor_position (tb, 0); - *first_last = FIRST_TO_LAST; - break; - - case LEAF_FROM_S_TO_R: /* it is used in leaf_shift_right */ - src_bi->tb = tb; - src_bi->bi_bh = PATH_PLAST_BUFFER (tb->tb_path); - src_bi->bi_parent = PATH_H_PPARENT (tb->tb_path, 0); - src_bi->bi_position = PATH_H_B_ITEM_ORDER (tb->tb_path, 0); - dest_bi->tb = tb; - dest_bi->bi_bh = tb->R[0]; - dest_bi->bi_parent = tb->FR[0]; - dest_bi->bi_position = get_right_neighbor_position (tb, 0); - *first_last = LAST_TO_FIRST; - break; - - case LEAF_FROM_R_TO_L: /* it is used in balance_leaf_when_delete */ - src_bi->tb = tb; - src_bi->bi_bh = tb->R[0]; - src_bi->bi_parent = tb->FR[0]; - src_bi->bi_position = get_right_neighbor_position (tb, 0); - dest_bi->tb = tb; - dest_bi->bi_bh = tb->L[0]; - dest_bi->bi_parent = tb->FL[0]; - dest_bi->bi_position = get_left_neighbor_position (tb, 0); - *first_last = FIRST_TO_LAST; - break; - - case LEAF_FROM_L_TO_R: /* it is used in balance_leaf_when_delete */ - src_bi->tb = tb; - src_bi->bi_bh = tb->L[0]; - src_bi->bi_parent = tb->FL[0]; - src_bi->bi_position = get_left_neighbor_position (tb, 0); - dest_bi->tb = tb; - dest_bi->bi_bh = tb->R[0]; - dest_bi->bi_parent = tb->FR[0]; - dest_bi->bi_position = get_right_neighbor_position (tb, 0); - *first_last = LAST_TO_FIRST; - break; - - case LEAF_FROM_S_TO_SNEW: - src_bi->tb = tb; - src_bi->bi_bh = PATH_PLAST_BUFFER (tb->tb_path); - src_bi->bi_parent = PATH_H_PPARENT (tb->tb_path, 0); - src_bi->bi_position = PATH_H_B_ITEM_ORDER (tb->tb_path, 0); - dest_bi->tb = tb; - dest_bi->bi_bh = Snew; - dest_bi->bi_parent = NULL; - dest_bi->bi_position = 0; - *first_last = LAST_TO_FIRST; - break; - - default: - reiserfs_panic (NULL, "vs-10250: leaf_define_dest_src_infos: shift type is unknown (%d)", shift_mode); - } - RFALSE( src_bi->bi_bh == 0 || dest_bi->bi_bh == 0, - "vs-10260: mode==%d, source (%p) or dest (%p) buffer is initialized incorrectly", - shift_mode, src_bi->bi_bh, dest_bi->bi_bh); + 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 LEAF_FROM_S_TO_L: /* it is used in leaf_shift_left */ + src_bi->tb = tb; + src_bi->bi_bh = PATH_PLAST_BUFFER(tb->tb_path); + src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, 0); + src_bi->bi_position = PATH_H_B_ITEM_ORDER(tb->tb_path, 0); /* src->b_item_order */ + dest_bi->tb = tb; + dest_bi->bi_bh = tb->L[0]; + dest_bi->bi_parent = tb->FL[0]; + dest_bi->bi_position = get_left_neighbor_position(tb, 0); + *first_last = FIRST_TO_LAST; + break; + + case LEAF_FROM_S_TO_R: /* it is used in leaf_shift_right */ + src_bi->tb = tb; + src_bi->bi_bh = PATH_PLAST_BUFFER(tb->tb_path); + src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, 0); + src_bi->bi_position = PATH_H_B_ITEM_ORDER(tb->tb_path, 0); + dest_bi->tb = tb; + dest_bi->bi_bh = tb->R[0]; + dest_bi->bi_parent = tb->FR[0]; + dest_bi->bi_position = get_right_neighbor_position(tb, 0); + *first_last = LAST_TO_FIRST; + break; + + case LEAF_FROM_R_TO_L: /* it is used in balance_leaf_when_delete */ + src_bi->tb = tb; + src_bi->bi_bh = tb->R[0]; + src_bi->bi_parent = tb->FR[0]; + src_bi->bi_position = get_right_neighbor_position(tb, 0); + dest_bi->tb = tb; + dest_bi->bi_bh = tb->L[0]; + dest_bi->bi_parent = tb->FL[0]; + dest_bi->bi_position = get_left_neighbor_position(tb, 0); + *first_last = FIRST_TO_LAST; + break; + + case LEAF_FROM_L_TO_R: /* it is used in balance_leaf_when_delete */ + src_bi->tb = tb; + src_bi->bi_bh = tb->L[0]; + src_bi->bi_parent = tb->FL[0]; + src_bi->bi_position = get_left_neighbor_position(tb, 0); + dest_bi->tb = tb; + dest_bi->bi_bh = tb->R[0]; + dest_bi->bi_parent = tb->FR[0]; + dest_bi->bi_position = get_right_neighbor_position(tb, 0); + *first_last = LAST_TO_FIRST; + break; + + case LEAF_FROM_S_TO_SNEW: + src_bi->tb = tb; + src_bi->bi_bh = PATH_PLAST_BUFFER(tb->tb_path); + src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, 0); + src_bi->bi_position = PATH_H_B_ITEM_ORDER(tb->tb_path, 0); + dest_bi->tb = tb; + dest_bi->bi_bh = Snew; + dest_bi->bi_parent = NULL; + dest_bi->bi_position = 0; + *first_last = LAST_TO_FIRST; + break; + + default: + reiserfs_panic(NULL, + "vs-10250: leaf_define_dest_src_infos: shift type is unknown (%d)", + shift_mode); + } + RFALSE(src_bi->bi_bh == 0 || dest_bi->bi_bh == 0, + "vs-10260: mode==%d, source (%p) or dest (%p) buffer is initialized incorrectly", + shift_mode, src_bi->bi_bh, dest_bi->bi_bh); } - - - /* copy mov_num items and mov_bytes of the (mov_num-1)th item to neighbor. Delete them from source */ -int leaf_move_items (int shift_mode, struct tree_balance * tb, int mov_num, int mov_bytes, struct buffer_head * Snew) +int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num, + int mov_bytes, struct buffer_head *Snew) { - int ret_value; - struct buffer_info dest_bi, src_bi; - int first_last; + int ret_value; + struct buffer_info dest_bi, src_bi; + int first_last; - leaf_define_dest_src_infos (shift_mode, tb, &dest_bi, &src_bi, &first_last, Snew); + leaf_define_dest_src_infos(shift_mode, tb, &dest_bi, &src_bi, + &first_last, Snew); - ret_value = leaf_copy_items (&dest_bi, src_bi.bi_bh, first_last, mov_num, mov_bytes); + ret_value = + leaf_copy_items(&dest_bi, src_bi.bi_bh, first_last, mov_num, + mov_bytes); - leaf_delete_items (&src_bi, first_last, (first_last == FIRST_TO_LAST) ? 0 : (B_NR_ITEMS(src_bi.bi_bh) - mov_num), mov_num, mov_bytes); + leaf_delete_items(&src_bi, first_last, + (first_last == + FIRST_TO_LAST) ? 0 : (B_NR_ITEMS(src_bi.bi_bh) - + mov_num), mov_num, mov_bytes); - - return ret_value; + return ret_value; } - /* Shift shift_num items (and shift_bytes of last shifted item if shift_bytes != -1) from S[0] to L[0] and replace the delimiting key */ -int leaf_shift_left (struct tree_balance * tb, int shift_num, int shift_bytes) +int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes) { - struct buffer_head * S0 = PATH_PLAST_BUFFER (tb->tb_path); - int i; + struct buffer_head *S0 = PATH_PLAST_BUFFER(tb->tb_path); + int i; - /* move shift_num (and shift_bytes bytes) items from S[0] to left neighbor L[0] */ - i = leaf_move_items (LEAF_FROM_S_TO_L, tb, shift_num, shift_bytes, NULL); + /* move shift_num (and shift_bytes bytes) items from S[0] to left neighbor L[0] */ + i = leaf_move_items(LEAF_FROM_S_TO_L, tb, shift_num, shift_bytes, NULL); - if ( shift_num ) { - if (B_NR_ITEMS (S0) == 0) { /* number of items in S[0] == 0 */ + if (shift_num) { + if (B_NR_ITEMS(S0) == 0) { /* number of items in S[0] == 0 */ - RFALSE( shift_bytes != -1, - "vs-10270: S0 is empty now, but shift_bytes != -1 (%d)", - shift_bytes); + RFALSE(shift_bytes != -1, + "vs-10270: S0 is empty now, but shift_bytes != -1 (%d)", + shift_bytes); #ifdef CONFIG_REISERFS_CHECK - if (tb->tb_mode == M_PASTE || tb->tb_mode == M_INSERT) { - print_cur_tb ("vs-10275"); - reiserfs_panic (tb->tb_sb, "vs-10275: leaf_shift_left: balance condition corrupted (%c)", tb->tb_mode); - } + if (tb->tb_mode == M_PASTE || tb->tb_mode == M_INSERT) { + print_cur_tb("vs-10275"); + reiserfs_panic(tb->tb_sb, + "vs-10275: leaf_shift_left: balance condition corrupted (%c)", + tb->tb_mode); + } #endif - if (PATH_H_POSITION (tb->tb_path, 1) == 0) - replace_key (tb, tb->CFL[0], tb->lkey[0], PATH_H_PPARENT (tb->tb_path, 0), 0); - - } else { - /* replace lkey in CFL[0] by 0-th key from S[0]; */ - replace_key (tb, tb->CFL[0], tb->lkey[0], S0, 0); - - RFALSE( (shift_bytes != -1 && - !(is_direntry_le_ih (B_N_PITEM_HEAD (S0, 0)) - && !I_ENTRY_COUNT (B_N_PITEM_HEAD (S0, 0)))) && - (!op_is_left_mergeable (B_N_PKEY (S0, 0), S0->b_size)), - "vs-10280: item must be mergeable"); - } - } - - return i; -} - - - + if (PATH_H_POSITION(tb->tb_path, 1) == 0) + replace_key(tb, tb->CFL[0], tb->lkey[0], + PATH_H_PPARENT(tb->tb_path, 0), 0); + + } else { + /* replace lkey in CFL[0] by 0-th key from S[0]; */ + replace_key(tb, tb->CFL[0], tb->lkey[0], S0, 0); + + RFALSE((shift_bytes != -1 && + !(is_direntry_le_ih(B_N_PITEM_HEAD(S0, 0)) + && !I_ENTRY_COUNT(B_N_PITEM_HEAD(S0, 0)))) && + (!op_is_left_mergeable + (B_N_PKEY(S0, 0), S0->b_size)), + "vs-10280: item must be mergeable"); + } + } + return i; +} /* CLEANING STOPPED HERE */ - - - /* Shift shift_num (shift_bytes) items from S[0] to the right neighbor, and replace the delimiting key */ -int leaf_shift_right( - struct tree_balance * tb, - int shift_num, - int shift_bytes - ) +int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes) { - // struct buffer_head * S0 = PATH_PLAST_BUFFER (tb->tb_path); - int ret_value; + // struct buffer_head * S0 = PATH_PLAST_BUFFER (tb->tb_path); + int ret_value; - /* move shift_num (and shift_bytes) items from S[0] to right neighbor R[0] */ - ret_value = leaf_move_items (LEAF_FROM_S_TO_R, tb, shift_num, shift_bytes, NULL); + /* move shift_num (and shift_bytes) items from S[0] to right neighbor R[0] */ + ret_value = + leaf_move_items(LEAF_FROM_S_TO_R, tb, shift_num, shift_bytes, NULL); - /* replace rkey in CFR[0] by the 0-th key from R[0] */ - if (shift_num) { - replace_key (tb, tb->CFR[0], tb->rkey[0], tb->R[0], 0); + /* replace rkey in CFR[0] by the 0-th key from R[0] */ + if (shift_num) { + replace_key(tb, tb->CFR[0], tb->rkey[0], tb->R[0], 0); - } + } - return ret_value; + return ret_value; } - - -static void leaf_delete_items_entirely (struct buffer_info * bi, - int first, int del_num); +static void leaf_delete_items_entirely(struct buffer_info *bi, + int first, int del_num); /* If del_bytes == -1, starting from position 'first' delete del_num items in whole in buffer CUR. If not. If last_first == 0. Starting from position 'first' delete del_num-1 items in whole. Delete part of body of @@ -670,287 +731,292 @@ static void leaf_delete_items_entirely (struct buffer_info * bi, If last_first == 1. Starting from position 'first+1' delete del_num-1 items in whole. Delete part of body of the last item . Part defined by del_bytes. Don't delete last item header. */ -void leaf_delete_items (struct buffer_info * cur_bi, int last_first, - int first, int del_num, int del_bytes) +void leaf_delete_items(struct buffer_info *cur_bi, int last_first, + int first, int del_num, int del_bytes) { - struct buffer_head * bh; - int item_amount = B_NR_ITEMS (bh = cur_bi->bi_bh); - - RFALSE( !bh, "10155: bh is not defined"); - RFALSE( del_num < 0, "10160: del_num can not be < 0. del_num==%d", del_num); - RFALSE( first < 0 || first + del_num > item_amount, - "10165: invalid number of first item to be deleted (%d) or " - "no so much items (%d) to delete (only %d)", - first, first + del_num, item_amount); - - if ( del_num == 0 ) - return; - - if ( first == 0 && del_num == item_amount && del_bytes == -1 ) { - make_empty_node (cur_bi); - do_balance_mark_leaf_dirty (cur_bi->tb, bh, 0); - return; - } - - if ( del_bytes == -1 ) - /* delete del_num items beginning from item in position first */ - leaf_delete_items_entirely (cur_bi, first, del_num); - else { - if ( last_first == FIRST_TO_LAST ) { - /* delete del_num-1 items beginning from item in position first */ - leaf_delete_items_entirely (cur_bi, first, del_num-1); - - /* delete the part of the first item of the bh - do not delete item header - */ - leaf_cut_from_buffer (cur_bi, 0, 0, del_bytes); - } else { - struct item_head * ih; - int len; - - /* delete del_num-1 items beginning from item in position first+1 */ - leaf_delete_items_entirely (cur_bi, first+1, del_num-1); - - if (is_direntry_le_ih (ih = B_N_PITEM_HEAD(bh, B_NR_ITEMS(bh)-1))) /* the last item is directory */ - /* len = numbers of directory entries in this item */ - len = ih_entry_count(ih); - else - /* len = body len of item */ - len = ih_item_len(ih); - - /* delete the part of the last item of the bh - do not delete item header - */ - leaf_cut_from_buffer (cur_bi, B_NR_ITEMS(bh)-1, len - del_bytes, del_bytes); + struct buffer_head *bh; + int item_amount = B_NR_ITEMS(bh = cur_bi->bi_bh); + + RFALSE(!bh, "10155: bh is not defined"); + RFALSE(del_num < 0, "10160: del_num can not be < 0. del_num==%d", + del_num); + RFALSE(first < 0 + || first + del_num > item_amount, + "10165: invalid number of first item to be deleted (%d) or " + "no so much items (%d) to delete (only %d)", first, + first + del_num, item_amount); + + if (del_num == 0) + return; + + if (first == 0 && del_num == item_amount && del_bytes == -1) { + make_empty_node(cur_bi); + do_balance_mark_leaf_dirty(cur_bi->tb, bh, 0); + return; } - } -} + if (del_bytes == -1) + /* delete del_num items beginning from item in position first */ + leaf_delete_items_entirely(cur_bi, first, del_num); + else { + if (last_first == FIRST_TO_LAST) { + /* delete del_num-1 items beginning from item in position first */ + leaf_delete_items_entirely(cur_bi, first, del_num - 1); + + /* delete the part of the first item of the bh + do not delete item header + */ + leaf_cut_from_buffer(cur_bi, 0, 0, del_bytes); + } else { + struct item_head *ih; + int len; + + /* delete del_num-1 items beginning from item in position first+1 */ + leaf_delete_items_entirely(cur_bi, first + 1, + del_num - 1); + + if (is_direntry_le_ih + (ih = B_N_PITEM_HEAD(bh, B_NR_ITEMS(bh) - 1))) + /* the last item is directory */ + /* len = numbers of directory entries in this item */ + len = ih_entry_count(ih); + else + /* len = body len of item */ + len = ih_item_len(ih); + + /* delete the part of the last item of the bh + do not delete item header + */ + leaf_cut_from_buffer(cur_bi, B_NR_ITEMS(bh) - 1, + len - del_bytes, del_bytes); + } + } +} /* insert item into the leaf node in position before */ -void leaf_insert_into_buf (struct buffer_info * bi, int before, - struct item_head * inserted_item_ih, - const char * inserted_item_body, - int zeros_number) +void leaf_insert_into_buf(struct buffer_info *bi, int before, + struct item_head *inserted_item_ih, + const char *inserted_item_body, int zeros_number) { - struct buffer_head * bh = bi->bi_bh; - int nr, free_space; - struct block_head * blkh; - struct item_head * ih; - int i; - int last_loc, unmoved_loc; - char * to; - - - blkh = B_BLK_HEAD(bh); - nr = blkh_nr_item(blkh); - free_space = blkh_free_space( blkh ); - - /* check free space */ - RFALSE( free_space < ih_item_len(inserted_item_ih) + IH_SIZE, - "vs-10170: not enough free space in block %z, new item %h", - bh, inserted_item_ih); - RFALSE( zeros_number > ih_item_len(inserted_item_ih), - "vs-10172: zero number == %d, item length == %d", - zeros_number, ih_item_len(inserted_item_ih)); - - - /* get item new item must be inserted before */ - ih = B_N_PITEM_HEAD (bh, before); - - /* prepare space for the body of new item */ - last_loc = nr ? ih_location( &(ih[nr - before - 1]) ) : bh->b_size; - unmoved_loc = before ? ih_location( ih-1 ) : bh->b_size; - - - memmove (bh->b_data + last_loc - ih_item_len(inserted_item_ih), - bh->b_data + last_loc, unmoved_loc - last_loc); - - to = bh->b_data + unmoved_loc - ih_item_len(inserted_item_ih); - memset (to, 0, zeros_number); - to += zeros_number; - - /* copy body to prepared space */ - if (inserted_item_body) - memmove (to, inserted_item_body, ih_item_len(inserted_item_ih) - zeros_number); - else - memset(to, '\0', ih_item_len(inserted_item_ih) - zeros_number); - - /* insert item header */ - memmove (ih + 1, ih, IH_SIZE * (nr - before)); - memmove (ih, inserted_item_ih, IH_SIZE); - - /* change locations */ - for (i = before; i < nr + 1; i ++) - { - unmoved_loc -= ih_item_len( &(ih[i-before])); - put_ih_location( &(ih[i-before]), unmoved_loc ); - } - - /* sizes, free space, item number */ - set_blkh_nr_item( blkh, blkh_nr_item(blkh) + 1 ); - set_blkh_free_space( blkh, - free_space - (IH_SIZE + ih_item_len(inserted_item_ih ) ) ); - do_balance_mark_leaf_dirty (bi->tb, bh, 1); - - if (bi->bi_parent) { - struct disk_child *t_dc; - t_dc = B_N_CHILD (bi->bi_parent, bi->bi_position); - put_dc_size( t_dc, dc_size(t_dc) + (IH_SIZE + ih_item_len(inserted_item_ih))); - do_balance_mark_internal_dirty (bi->tb, bi->bi_parent, 0); - } -} + struct buffer_head *bh = bi->bi_bh; + int nr, free_space; + struct block_head *blkh; + struct item_head *ih; + int i; + int last_loc, unmoved_loc; + char *to; + + blkh = B_BLK_HEAD(bh); + nr = blkh_nr_item(blkh); + free_space = blkh_free_space(blkh); + + /* check free space */ + RFALSE(free_space < ih_item_len(inserted_item_ih) + IH_SIZE, + "vs-10170: not enough free space in block %z, new item %h", + bh, inserted_item_ih); + RFALSE(zeros_number > ih_item_len(inserted_item_ih), + "vs-10172: zero number == %d, item length == %d", + zeros_number, ih_item_len(inserted_item_ih)); + + /* get item new item must be inserted before */ + ih = B_N_PITEM_HEAD(bh, before); + + /* prepare space for the body of new item */ + last_loc = nr ? ih_location(&(ih[nr - before - 1])) : bh->b_size; + unmoved_loc = before ? ih_location(ih - 1) : bh->b_size; + + memmove(bh->b_data + last_loc - ih_item_len(inserted_item_ih), + bh->b_data + last_loc, unmoved_loc - last_loc); + + to = bh->b_data + unmoved_loc - ih_item_len(inserted_item_ih); + memset(to, 0, zeros_number); + to += zeros_number; + + /* copy body to prepared space */ + if (inserted_item_body) + memmove(to, inserted_item_body, + ih_item_len(inserted_item_ih) - zeros_number); + else + memset(to, '\0', ih_item_len(inserted_item_ih) - zeros_number); + + /* insert item header */ + memmove(ih + 1, ih, IH_SIZE * (nr - before)); + memmove(ih, inserted_item_ih, IH_SIZE); + + /* change locations */ + for (i = before; i < nr + 1; i++) { + unmoved_loc -= ih_item_len(&(ih[i - before])); + put_ih_location(&(ih[i - before]), unmoved_loc); + } + /* sizes, free space, item number */ + set_blkh_nr_item(blkh, blkh_nr_item(blkh) + 1); + set_blkh_free_space(blkh, + free_space - (IH_SIZE + + ih_item_len(inserted_item_ih))); + do_balance_mark_leaf_dirty(bi->tb, bh, 1); + + if (bi->bi_parent) { + struct disk_child *t_dc; + t_dc = B_N_CHILD(bi->bi_parent, bi->bi_position); + put_dc_size(t_dc, + dc_size(t_dc) + (IH_SIZE + + ih_item_len(inserted_item_ih))); + do_balance_mark_internal_dirty(bi->tb, bi->bi_parent, 0); + } +} /* paste paste_size bytes to affected_item_num-th item. When item is a directory, this only prepare space for new entries */ -void leaf_paste_in_buffer (struct buffer_info * bi, int affected_item_num, - int pos_in_item, int paste_size, - const char * body, - int zeros_number) +void leaf_paste_in_buffer(struct buffer_info *bi, int affected_item_num, + int pos_in_item, int paste_size, + const char *body, int zeros_number) { - struct buffer_head * bh = bi->bi_bh; - int nr, free_space; - struct block_head * blkh; - struct item_head * ih; - int i; - int last_loc, unmoved_loc; - - blkh = B_BLK_HEAD(bh); - nr = blkh_nr_item(blkh); - free_space = blkh_free_space(blkh); - - - /* check free space */ - RFALSE( free_space < paste_size, - "vs-10175: not enough free space: needed %d, available %d", - paste_size, free_space); + struct buffer_head *bh = bi->bi_bh; + int nr, free_space; + struct block_head *blkh; + struct item_head *ih; + int i; + int last_loc, unmoved_loc; + + blkh = B_BLK_HEAD(bh); + nr = blkh_nr_item(blkh); + free_space = blkh_free_space(blkh); + + /* check free space */ + RFALSE(free_space < paste_size, + "vs-10175: not enough free space: needed %d, available %d", + paste_size, free_space); #ifdef CONFIG_REISERFS_CHECK - if (zeros_number > paste_size) { - print_cur_tb ("10177"); - reiserfs_panic ( NULL, "vs-10177: leaf_paste_in_buffer: ero number == %d, paste_size == %d", - zeros_number, paste_size); - } -#endif /* CONFIG_REISERFS_CHECK */ - - - /* item to be appended */ - ih = B_N_PITEM_HEAD(bh, affected_item_num); - - last_loc = ih_location( &(ih[nr - affected_item_num - 1]) ); - unmoved_loc = affected_item_num ? ih_location( ih-1 ) : bh->b_size; - - /* prepare space */ - memmove (bh->b_data + last_loc - paste_size, bh->b_data + last_loc, - unmoved_loc - last_loc); - - - /* change locations */ - for (i = affected_item_num; i < nr; i ++) - put_ih_location( &(ih[i-affected_item_num]), - ih_location( &(ih[i-affected_item_num])) - paste_size ); - - if ( body ) { - if (!is_direntry_le_ih (ih)) { - if (!pos_in_item) { - /* shift data to right */ - memmove (bh->b_data + ih_location(ih) + paste_size, - bh->b_data + ih_location(ih), ih_item_len(ih)); - /* paste data in the head of item */ - memset (bh->b_data + ih_location(ih), 0, zeros_number); - memcpy (bh->b_data + ih_location(ih) + zeros_number, body, paste_size - zeros_number); - } else { - memset (bh->b_data + unmoved_loc - paste_size, 0, zeros_number); - memcpy (bh->b_data + unmoved_loc - paste_size + zeros_number, body, paste_size - zeros_number); - } + if (zeros_number > paste_size) { + print_cur_tb("10177"); + reiserfs_panic(NULL, + "vs-10177: leaf_paste_in_buffer: ero number == %d, paste_size == %d", + zeros_number, paste_size); + } +#endif /* CONFIG_REISERFS_CHECK */ + + /* item to be appended */ + ih = B_N_PITEM_HEAD(bh, affected_item_num); + + last_loc = ih_location(&(ih[nr - affected_item_num - 1])); + unmoved_loc = affected_item_num ? ih_location(ih - 1) : bh->b_size; + + /* prepare space */ + memmove(bh->b_data + last_loc - paste_size, bh->b_data + last_loc, + unmoved_loc - last_loc); + + /* change locations */ + for (i = affected_item_num; i < nr; i++) + put_ih_location(&(ih[i - affected_item_num]), + ih_location(&(ih[i - affected_item_num])) - + paste_size); + + if (body) { + if (!is_direntry_le_ih(ih)) { + if (!pos_in_item) { + /* shift data to right */ + memmove(bh->b_data + ih_location(ih) + + paste_size, + bh->b_data + ih_location(ih), + ih_item_len(ih)); + /* paste data in the head of item */ + memset(bh->b_data + ih_location(ih), 0, + zeros_number); + memcpy(bh->b_data + ih_location(ih) + + zeros_number, body, + paste_size - zeros_number); + } else { + memset(bh->b_data + unmoved_loc - paste_size, 0, + zeros_number); + memcpy(bh->b_data + unmoved_loc - paste_size + + zeros_number, body, + paste_size - zeros_number); + } + } + } else + memset(bh->b_data + unmoved_loc - paste_size, '\0', paste_size); + + put_ih_item_len(ih, ih_item_len(ih) + paste_size); + + /* change free space */ + set_blkh_free_space(blkh, free_space - paste_size); + + do_balance_mark_leaf_dirty(bi->tb, bh, 0); + + if (bi->bi_parent) { + struct disk_child *t_dc = + B_N_CHILD(bi->bi_parent, bi->bi_position); + put_dc_size(t_dc, dc_size(t_dc) + paste_size); + do_balance_mark_internal_dirty(bi->tb, bi->bi_parent, 0); } - } - else - memset(bh->b_data + unmoved_loc - paste_size, '\0', paste_size); - - put_ih_item_len( ih, ih_item_len(ih) + paste_size ); - - /* change free space */ - set_blkh_free_space( blkh, free_space - paste_size ); - - do_balance_mark_leaf_dirty (bi->tb, bh, 0); - - if (bi->bi_parent) { - struct disk_child *t_dc = B_N_CHILD (bi->bi_parent, bi->bi_position); - put_dc_size( t_dc, dc_size(t_dc) + paste_size ); - do_balance_mark_internal_dirty (bi->tb, bi->bi_parent, 0); - } } - /* cuts DEL_COUNT entries beginning from FROM-th entry. Directory item does not have free space, so it moves DEHs and remaining records as necessary. Return value is size of removed part of directory item in bytes. */ -static int leaf_cut_entries ( - struct buffer_head * bh, - struct item_head * ih, - int from, - int del_count - ) +static int leaf_cut_entries(struct buffer_head *bh, + struct item_head *ih, int from, int del_count) { - char * item; - struct reiserfs_de_head * deh; - int prev_record_offset; /* offset of record, that is (from-1)th */ - char * prev_record; /* */ - int cut_records_len; /* length of all removed records */ - int i; - - - /* make sure, that item is directory and there are enough entries to - remove */ - RFALSE( !is_direntry_le_ih (ih), "10180: item is not directory item"); - RFALSE( I_ENTRY_COUNT(ih) < from + del_count, - "10185: item contains not enough entries: entry_cout = %d, from = %d, to delete = %d", - I_ENTRY_COUNT(ih), from, del_count); - - if (del_count == 0) - return 0; - - /* first byte of item */ - item = bh->b_data + ih_location(ih); - - /* entry head array */ - deh = B_I_DEH (bh, ih); - - /* first byte of remaining entries, those are BEFORE cut entries - (prev_record) and length of all removed records (cut_records_len) */ - prev_record_offset = (from ? deh_location( &(deh[from - 1])) : ih_item_len(ih)); - cut_records_len = prev_record_offset/*from_record*/ - - deh_location( &(deh[from + del_count - 1])); - prev_record = item + prev_record_offset; - - - /* adjust locations of remaining entries */ - for (i = I_ENTRY_COUNT(ih) - 1; i > from + del_count - 1; i --) - put_deh_location( &(deh[i]), - deh_location( &deh[i] ) - (DEH_SIZE * del_count ) ); - - for (i = 0; i < from; i ++) - put_deh_location( &(deh[i]), - deh_location( &deh[i] ) - (DEH_SIZE * del_count + cut_records_len) ); - - put_ih_entry_count( ih, ih_entry_count(ih) - del_count ); - - /* shift entry head array and entries those are AFTER removed entries */ - memmove ((char *)(deh + from), - deh + from + del_count, - prev_record - cut_records_len - (char *)(deh + from + del_count)); - - /* shift records, those are BEFORE removed entries */ - memmove (prev_record - cut_records_len - DEH_SIZE * del_count, - prev_record, item + ih_item_len(ih) - prev_record); - - return DEH_SIZE * del_count + cut_records_len; + char *item; + struct reiserfs_de_head *deh; + int prev_record_offset; /* offset of record, that is (from-1)th */ + char *prev_record; /* */ + int cut_records_len; /* length of all removed records */ + int i; + + /* make sure, that item is directory and there are enough entries to + remove */ + RFALSE(!is_direntry_le_ih(ih), "10180: item is not directory item"); + RFALSE(I_ENTRY_COUNT(ih) < from + del_count, + "10185: item contains not enough entries: entry_cout = %d, from = %d, to delete = %d", + I_ENTRY_COUNT(ih), from, del_count); + + if (del_count == 0) + return 0; + + /* first byte of item */ + item = bh->b_data + ih_location(ih); + + /* entry head array */ + deh = B_I_DEH(bh, ih); + + /* first byte of remaining entries, those are BEFORE cut entries + (prev_record) and length of all removed records (cut_records_len) */ + prev_record_offset = + (from ? deh_location(&(deh[from - 1])) : ih_item_len(ih)); + cut_records_len = prev_record_offset /*from_record */ - + deh_location(&(deh[from + del_count - 1])); + prev_record = item + prev_record_offset; + + /* adjust locations of remaining entries */ + for (i = I_ENTRY_COUNT(ih) - 1; i > from + del_count - 1; i--) + put_deh_location(&(deh[i]), + deh_location(&deh[i]) - + (DEH_SIZE * del_count)); + + for (i = 0; i < from; i++) + put_deh_location(&(deh[i]), + deh_location(&deh[i]) - (DEH_SIZE * del_count + + cut_records_len)); + + put_ih_entry_count(ih, ih_entry_count(ih) - del_count); + + /* shift entry head array and entries those are AFTER removed entries */ + memmove((char *)(deh + from), + deh + from + del_count, + prev_record - cut_records_len - (char *)(deh + from + + del_count)); + + /* shift records, those are BEFORE removed entries */ + memmove(prev_record - cut_records_len - DEH_SIZE * del_count, + prev_record, item + ih_item_len(ih) - prev_record); + + return DEH_SIZE * del_count + cut_records_len; } - /* when cut item is part of regular file pos_in_item - first byte that must be cut cut_size - number of bytes to be cut beginning from pos_in_item @@ -959,264 +1025,278 @@ static int leaf_cut_entries ( pos_in_item - number of first deleted entry cut_size - count of deleted entries */ -void leaf_cut_from_buffer (struct buffer_info * bi, int cut_item_num, - int pos_in_item, int cut_size) +void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num, + int pos_in_item, int cut_size) { - int nr; - struct buffer_head * bh = bi->bi_bh; - struct block_head * blkh; - struct item_head * ih; - int last_loc, unmoved_loc; - int i; - - blkh = B_BLK_HEAD(bh); - nr = blkh_nr_item(blkh); - - /* item head of truncated item */ - ih = B_N_PITEM_HEAD (bh, cut_item_num); - - if (is_direntry_le_ih (ih)) { - /* first cut entry ()*/ - cut_size = leaf_cut_entries (bh, ih, pos_in_item, cut_size); - if (pos_in_item == 0) { - /* change key */ - RFALSE( cut_item_num, - "when 0-th enrty of item is cut, that item must be first in the node, not %d-th", cut_item_num); - /* change item key by key of first entry in the item */ - set_le_ih_k_offset (ih, deh_offset(B_I_DEH (bh, ih))); - /*memcpy (&ih->ih_key.k_offset, &(B_I_DEH (bh, ih)->deh_offset), SHORT_KEY_SIZE);*/ - } - } else { - /* item is direct or indirect */ - RFALSE( is_statdata_le_ih (ih), "10195: item is stat data"); - RFALSE( pos_in_item && pos_in_item + cut_size != ih_item_len(ih), - "10200: invalid offset (%lu) or trunc_size (%lu) or ih_item_len (%lu)", - ( long unsigned ) pos_in_item, ( long unsigned ) cut_size, - ( long unsigned ) ih_item_len (ih)); - - /* shift item body to left if cut is from the head of item */ - if (pos_in_item == 0) { - memmove( bh->b_data + ih_location(ih), - bh->b_data + ih_location(ih) + cut_size, - ih_item_len(ih) - cut_size); - - /* change key of item */ - if (is_direct_le_ih (ih)) - set_le_ih_k_offset (ih, le_ih_k_offset (ih) + cut_size); - else { - set_le_ih_k_offset (ih, le_ih_k_offset (ih) + (cut_size / UNFM_P_SIZE) * bh->b_size); - RFALSE( ih_item_len(ih) == cut_size && get_ih_free_space (ih), - "10205: invalid ih_free_space (%h)", ih); - } - } - } - - - /* location of the last item */ - last_loc = ih_location( &(ih[nr - cut_item_num - 1]) ); - - /* location of the item, which is remaining at the same place */ - unmoved_loc = cut_item_num ? ih_location(ih-1) : bh->b_size; - - - /* shift */ - memmove (bh->b_data + last_loc + cut_size, bh->b_data + last_loc, - unmoved_loc - last_loc - cut_size); - - /* change item length */ - put_ih_item_len( ih, ih_item_len(ih) - cut_size ); - - if (is_indirect_le_ih (ih)) { - if (pos_in_item) - set_ih_free_space (ih, 0); - } - - /* change locations */ - for (i = cut_item_num; i < nr; i ++) - put_ih_location( &(ih[i-cut_item_num]), ih_location( &ih[i-cut_item_num]) + cut_size ); - - /* size, free space */ - set_blkh_free_space( blkh, blkh_free_space(blkh) + cut_size ); - - do_balance_mark_leaf_dirty (bi->tb, bh, 0); - - if (bi->bi_parent) { - struct disk_child *t_dc; - t_dc = B_N_CHILD (bi->bi_parent, bi->bi_position); - put_dc_size( t_dc, dc_size(t_dc) - cut_size ); - do_balance_mark_internal_dirty (bi->tb, bi->bi_parent, 0); - } -} + int nr; + struct buffer_head *bh = bi->bi_bh; + struct block_head *blkh; + struct item_head *ih; + int last_loc, unmoved_loc; + int i; + + blkh = B_BLK_HEAD(bh); + nr = blkh_nr_item(blkh); + + /* item head of truncated item */ + ih = B_N_PITEM_HEAD(bh, cut_item_num); + + if (is_direntry_le_ih(ih)) { + /* first cut entry () */ + cut_size = leaf_cut_entries(bh, ih, pos_in_item, cut_size); + if (pos_in_item == 0) { + /* change key */ + RFALSE(cut_item_num, + "when 0-th enrty of item is cut, that item must be first in the node, not %d-th", + cut_item_num); + /* change item key by key of first entry in the item */ + set_le_ih_k_offset(ih, deh_offset(B_I_DEH(bh, ih))); + /*memcpy (&ih->ih_key.k_offset, &(B_I_DEH (bh, ih)->deh_offset), SHORT_KEY_SIZE); */ + } + } else { + /* item is direct or indirect */ + RFALSE(is_statdata_le_ih(ih), "10195: item is stat data"); + RFALSE(pos_in_item && pos_in_item + cut_size != ih_item_len(ih), + "10200: invalid offset (%lu) or trunc_size (%lu) or ih_item_len (%lu)", + (long unsigned)pos_in_item, (long unsigned)cut_size, + (long unsigned)ih_item_len(ih)); + + /* shift item body to left if cut is from the head of item */ + if (pos_in_item == 0) { + memmove(bh->b_data + ih_location(ih), + bh->b_data + ih_location(ih) + cut_size, + ih_item_len(ih) - cut_size); + + /* change key of item */ + if (is_direct_le_ih(ih)) + set_le_ih_k_offset(ih, + le_ih_k_offset(ih) + + cut_size); + else { + set_le_ih_k_offset(ih, + le_ih_k_offset(ih) + + (cut_size / UNFM_P_SIZE) * + bh->b_size); + RFALSE(ih_item_len(ih) == cut_size + && get_ih_free_space(ih), + "10205: invalid ih_free_space (%h)", ih); + } + } + } + + /* location of the last item */ + last_loc = ih_location(&(ih[nr - cut_item_num - 1])); + + /* location of the item, which is remaining at the same place */ + unmoved_loc = cut_item_num ? ih_location(ih - 1) : bh->b_size; + + /* shift */ + memmove(bh->b_data + last_loc + cut_size, bh->b_data + last_loc, + unmoved_loc - last_loc - cut_size); + + /* change item length */ + put_ih_item_len(ih, ih_item_len(ih) - cut_size); + if (is_indirect_le_ih(ih)) { + if (pos_in_item) + set_ih_free_space(ih, 0); + } + + /* change locations */ + for (i = cut_item_num; i < nr; i++) + put_ih_location(&(ih[i - cut_item_num]), + ih_location(&ih[i - cut_item_num]) + cut_size); + + /* size, free space */ + set_blkh_free_space(blkh, blkh_free_space(blkh) + cut_size); + + do_balance_mark_leaf_dirty(bi->tb, bh, 0); + + if (bi->bi_parent) { + struct disk_child *t_dc; + t_dc = B_N_CHILD(bi->bi_parent, bi->bi_position); + put_dc_size(t_dc, dc_size(t_dc) - cut_size); + do_balance_mark_internal_dirty(bi->tb, bi->bi_parent, 0); + } +} /* delete del_num items from buffer starting from the first'th item */ -static void leaf_delete_items_entirely (struct buffer_info * bi, - int first, int del_num) +static void leaf_delete_items_entirely(struct buffer_info *bi, + int first, int del_num) { - struct buffer_head * bh = bi->bi_bh; - int nr; - int i, j; - int last_loc, last_removed_loc; - struct block_head * blkh; - struct item_head * ih; - - RFALSE( bh == NULL, "10210: buffer is 0"); - RFALSE( del_num < 0, "10215: del_num less than 0 (%d)", del_num); - - if (del_num == 0) - return; - - blkh = B_BLK_HEAD(bh); - nr = blkh_nr_item(blkh); - - RFALSE( first < 0 || first + del_num > nr, - "10220: first=%d, number=%d, there is %d items", first, del_num, nr); - - if (first == 0 && del_num == nr) { - /* this does not work */ - make_empty_node (bi); - - do_balance_mark_leaf_dirty (bi->tb, bh, 0); - return; - } - - ih = B_N_PITEM_HEAD (bh, first); - - /* location of unmovable item */ - j = (first == 0) ? bh->b_size : ih_location(ih-1); - - /* delete items */ - last_loc = ih_location( &(ih[nr-1-first]) ); - last_removed_loc = ih_location( &(ih[del_num-1]) ); - - memmove (bh->b_data + last_loc + j - last_removed_loc, - bh->b_data + last_loc, last_removed_loc - last_loc); - - /* delete item headers */ - memmove (ih, ih + del_num, (nr - first - del_num) * IH_SIZE); - - /* change item location */ - for (i = first; i < nr - del_num; i ++) - put_ih_location( &(ih[i-first]), ih_location( &(ih[i-first]) ) + (j - last_removed_loc) ); - - /* sizes, item number */ - set_blkh_nr_item( blkh, blkh_nr_item(blkh) - del_num ); - set_blkh_free_space( blkh, blkh_free_space(blkh) + (j - last_removed_loc + IH_SIZE * del_num) ); - - do_balance_mark_leaf_dirty (bi->tb, bh, 0); - - if (bi->bi_parent) { - struct disk_child *t_dc = B_N_CHILD (bi->bi_parent, bi->bi_position); - put_dc_size( t_dc, dc_size(t_dc) - - (j - last_removed_loc + IH_SIZE * del_num)); - do_balance_mark_internal_dirty (bi->tb, bi->bi_parent, 0); - } -} + struct buffer_head *bh = bi->bi_bh; + int nr; + int i, j; + int last_loc, last_removed_loc; + struct block_head *blkh; + struct item_head *ih; + + RFALSE(bh == NULL, "10210: buffer is 0"); + RFALSE(del_num < 0, "10215: del_num less than 0 (%d)", del_num); + + if (del_num == 0) + return; + + blkh = B_BLK_HEAD(bh); + nr = blkh_nr_item(blkh); + RFALSE(first < 0 || first + del_num > nr, + "10220: first=%d, number=%d, there is %d items", first, del_num, + nr); + + if (first == 0 && del_num == nr) { + /* this does not work */ + make_empty_node(bi); + + do_balance_mark_leaf_dirty(bi->tb, bh, 0); + return; + } + ih = B_N_PITEM_HEAD(bh, first); + /* location of unmovable item */ + j = (first == 0) ? bh->b_size : ih_location(ih - 1); + /* delete items */ + last_loc = ih_location(&(ih[nr - 1 - first])); + last_removed_loc = ih_location(&(ih[del_num - 1])); + + memmove(bh->b_data + last_loc + j - last_removed_loc, + bh->b_data + last_loc, last_removed_loc - last_loc); + + /* delete item headers */ + memmove(ih, ih + del_num, (nr - first - del_num) * IH_SIZE); + + /* change item location */ + for (i = first; i < nr - del_num; i++) + put_ih_location(&(ih[i - first]), + ih_location(&(ih[i - first])) + (j - + last_removed_loc)); + + /* sizes, item number */ + set_blkh_nr_item(blkh, blkh_nr_item(blkh) - del_num); + set_blkh_free_space(blkh, + blkh_free_space(blkh) + (j - last_removed_loc + + IH_SIZE * del_num)); + + do_balance_mark_leaf_dirty(bi->tb, bh, 0); + + if (bi->bi_parent) { + struct disk_child *t_dc = + B_N_CHILD(bi->bi_parent, bi->bi_position); + put_dc_size(t_dc, + dc_size(t_dc) - (j - last_removed_loc + + IH_SIZE * del_num)); + do_balance_mark_internal_dirty(bi->tb, bi->bi_parent, 0); + } +} /* paste new_entry_count entries (new_dehs, records) into position before to item_num-th item */ -void leaf_paste_entries ( - struct buffer_head * bh, +void leaf_paste_entries(struct buffer_head *bh, int item_num, int before, int new_entry_count, - struct reiserfs_de_head * new_dehs, - const char * records, - int paste_size - ) + struct reiserfs_de_head *new_dehs, + const char *records, int paste_size) { - struct item_head * ih; - char * item; - struct reiserfs_de_head * deh; - char * insert_point; - int i, old_entry_num; - - if (new_entry_count == 0) - return; - - ih = B_N_PITEM_HEAD(bh, item_num); - - /* make sure, that item is directory, and there are enough records in it */ - RFALSE( !is_direntry_le_ih (ih), "10225: item is not directory item"); - RFALSE( I_ENTRY_COUNT (ih) < before, - "10230: there are no entry we paste entries before. entry_count = %d, before = %d", - I_ENTRY_COUNT (ih), before); - - - /* first byte of dest item */ - item = bh->b_data + ih_location(ih); - - /* entry head array */ - deh = B_I_DEH (bh, ih); - - /* new records will be pasted at this point */ - insert_point = item + (before ? deh_location( &(deh[before - 1])) : (ih_item_len(ih) - paste_size)); - - /* adjust locations of records that will be AFTER new records */ - for (i = I_ENTRY_COUNT(ih) - 1; i >= before; i --) - put_deh_location( &(deh[i]), - deh_location(&(deh[i])) + (DEH_SIZE * new_entry_count )); - - /* adjust locations of records that will be BEFORE new records */ - for (i = 0; i < before; i ++) - put_deh_location( &(deh[i]), deh_location(&(deh[i])) + paste_size ); - - old_entry_num = I_ENTRY_COUNT(ih); - put_ih_entry_count( ih, ih_entry_count(ih) + new_entry_count ); - - /* prepare space for pasted records */ - memmove (insert_point + paste_size, insert_point, item + (ih_item_len(ih) - paste_size) - insert_point); - - /* copy new records */ - memcpy (insert_point + DEH_SIZE * new_entry_count, records, - paste_size - DEH_SIZE * new_entry_count); - - /* prepare space for new entry heads */ - deh += before; - memmove ((char *)(deh + new_entry_count), deh, insert_point - (char *)deh); - - /* copy new entry heads */ - deh = (struct reiserfs_de_head *)((char *)deh); - memcpy (deh, new_dehs, DEH_SIZE * new_entry_count); - - /* set locations of new records */ - for (i = 0; i < new_entry_count; i ++) - { - put_deh_location( &(deh[i]), - deh_location( &(deh[i] )) + - (- deh_location( &(new_dehs[new_entry_count - 1])) + - insert_point + DEH_SIZE * new_entry_count - item)); - } - - - /* change item key if necessary (when we paste before 0-th entry */ - if (!before) - { - set_le_ih_k_offset (ih, deh_offset(new_dehs)); + struct item_head *ih; + char *item; + struct reiserfs_de_head *deh; + char *insert_point; + int i, old_entry_num; + + if (new_entry_count == 0) + return; + + ih = B_N_PITEM_HEAD(bh, item_num); + + /* make sure, that item is directory, and there are enough records in it */ + RFALSE(!is_direntry_le_ih(ih), "10225: item is not directory item"); + RFALSE(I_ENTRY_COUNT(ih) < before, + "10230: there are no entry we paste entries before. entry_count = %d, before = %d", + I_ENTRY_COUNT(ih), before); + + /* first byte of dest item */ + item = bh->b_data + ih_location(ih); + + /* entry head array */ + deh = B_I_DEH(bh, ih); + + /* new records will be pasted at this point */ + insert_point = + item + + (before ? deh_location(&(deh[before - 1])) + : (ih_item_len(ih) - paste_size)); + + /* adjust locations of records that will be AFTER new records */ + for (i = I_ENTRY_COUNT(ih) - 1; i >= before; i--) + put_deh_location(&(deh[i]), + deh_location(&(deh[i])) + + (DEH_SIZE * new_entry_count)); + + /* adjust locations of records that will be BEFORE new records */ + for (i = 0; i < before; i++) + put_deh_location(&(deh[i]), + deh_location(&(deh[i])) + paste_size); + + old_entry_num = I_ENTRY_COUNT(ih); + put_ih_entry_count(ih, ih_entry_count(ih) + new_entry_count); + + /* prepare space for pasted records */ + memmove(insert_point + paste_size, insert_point, + item + (ih_item_len(ih) - paste_size) - insert_point); + + /* copy new records */ + memcpy(insert_point + DEH_SIZE * new_entry_count, records, + paste_size - DEH_SIZE * new_entry_count); + + /* prepare space for new entry heads */ + deh += before; + memmove((char *)(deh + new_entry_count), deh, + insert_point - (char *)deh); + + /* copy new entry heads */ + deh = (struct reiserfs_de_head *)((char *)deh); + memcpy(deh, new_dehs, DEH_SIZE * new_entry_count); + + /* set locations of new records */ + for (i = 0; i < new_entry_count; i++) { + put_deh_location(&(deh[i]), + deh_location(&(deh[i])) + + (-deh_location + (&(new_dehs[new_entry_count - 1])) + + insert_point + DEH_SIZE * new_entry_count - + item)); + } + + /* change item key if necessary (when we paste before 0-th entry */ + if (!before) { + set_le_ih_k_offset(ih, deh_offset(new_dehs)); /* memcpy (&ih->ih_key.k_offset, &new_dehs->deh_offset, SHORT_KEY_SIZE);*/ - } - + } #ifdef CONFIG_REISERFS_CHECK - { - int prev, next; - /* check record locations */ - deh = B_I_DEH (bh, ih); - for (i = 0; i < I_ENTRY_COUNT(ih); i ++) { - next = (i < I_ENTRY_COUNT(ih) - 1) ? deh_location( &(deh[i + 1])) : 0; - prev = (i != 0) ? deh_location( &(deh[i - 1]) ) : 0; - - if (prev && prev <= deh_location( &(deh[i]))) - reiserfs_warning (NULL, "vs-10240: leaf_paste_entries: directory item (%h) corrupted (prev %a, cur(%d) %a)", - ih, deh + i - 1, i, deh + i); - if (next && next >= deh_location( &(deh[i]))) - reiserfs_warning (NULL, "vs-10250: leaf_paste_entries: directory item (%h) corrupted (cur(%d) %a, next %a)", - ih, i, deh + i, deh + i + 1); - } - } + { + int prev, next; + /* check record locations */ + deh = B_I_DEH(bh, ih); + for (i = 0; i < I_ENTRY_COUNT(ih); i++) { + next = + (i < + I_ENTRY_COUNT(ih) - + 1) ? deh_location(&(deh[i + 1])) : 0; + prev = (i != 0) ? deh_location(&(deh[i - 1])) : 0; + + if (prev && prev <= deh_location(&(deh[i]))) + reiserfs_warning(NULL, + "vs-10240: leaf_paste_entries: directory item (%h) corrupted (prev %a, cur(%d) %a)", + ih, deh + i - 1, i, deh + i); + if (next && next >= deh_location(&(deh[i]))) + reiserfs_warning(NULL, + "vs-10250: leaf_paste_entries: directory item (%h) corrupted (cur(%d) %a, next %a)", + ih, i, deh + i, deh + i + 1); + } + } #endif } |