diff options
Diffstat (limited to 'fs/reiserfs/lbalance.c')
| -rw-r--r-- | fs/reiserfs/lbalance.c | 501 |
1 files changed, 308 insertions, 193 deletions
diff --git a/fs/reiserfs/lbalance.c b/fs/reiserfs/lbalance.c index 79e5a8b4c226..d6744c8b24e1 100644 --- a/fs/reiserfs/lbalance.c +++ b/fs/reiserfs/lbalance.c @@ -8,46 +8,42 @@ #include "reiserfs.h" #include <linux/buffer_head.h> -/* these are used in do_balance.c */ - -/* leaf_move_items - leaf_shift_left - leaf_shift_right - leaf_delete_items - leaf_insert_into_buf - leaf_paste_in_buffer - leaf_cut_from_buffer - leaf_paste_entries - */ - -/* copy copy_count entries from source directory item to dest buffer (creating new item if needed) */ +/* + * 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) { 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 */ + /* + * 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 + */ + int item_num_in_dest; + 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); + ih = item_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 */ + /* + * 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])) : + copy_records_len = (from ? deh_location(&deh[from - 1]) : ih_item_len(ih)) - - deh_location(&(deh[from + copy_count - 1])); + deh_location(&deh[from + copy_count - 1]); records = source->b_data + ih_location(ih) + - deh_location(&(deh[from + copy_count - 1])); + deh_location(&deh[from + copy_count - 1]); } else { copy_records_len = 0; records = NULL; @@ -59,12 +55,15 @@ static void leaf_copy_dir_entries(struct buffer_info *dest_bi, 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 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, + leaf_key(dest, item_num_in_dest)))) { /* create new item in dest */ @@ -80,16 +79,22 @@ static void leaf_copy_dir_entries(struct buffer_info *dest_bi, if (last_first == LAST_TO_FIRST) { /* form key by the following way */ - if (from < I_ENTRY_COUNT(ih)) { + if (from < ih_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); */ + deh_offset(&deh[from])); } else { - /* no entries will be copied to this item in this function */ + /* + * 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 */ + /* + * 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), + set_le_key_k_type(KEY_FORMAT_3_5, &new_ih.ih_key, TYPE_DIRENTRY); } @@ -113,36 +118,44 @@ static void leaf_copy_dir_entries(struct buffer_info *dest_bi, leaf_paste_entries(dest_bi, item_num_in_dest, (last_first == - FIRST_TO_LAST) ? I_ENTRY_COUNT(B_N_PITEM_HEAD(dest, + FIRST_TO_LAST) ? ih_entry_count(item_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 */ +/* + * 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) { struct buffer_head *dest = dest_bi->bi_bh; - int dest_nr_item, src_nr_item; /* number of items in the source and destination buffers */ + /* number of items in the source and destination buffers */ + int dest_nr_item, src_nr_item; struct item_head *ih; struct item_head *dih; dest_nr_item = B_NR_ITEMS(dest); + /* + * 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 + */ 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); + ih = item_head(src, 0); + dih = item_head(dest, dest_nr_item - 1); + + /* there is nothing to merge */ if (!dest_nr_item - || (!op_is_left_mergeable(&(ih->ih_key), src->b_size))) - /* there is nothing to merge */ + || (!op_is_left_mergeable(&ih->ih_key, src->b_size))) return 0; RFALSE(!ih_item_len(ih), @@ -157,8 +170,11 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi, 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 + /* + * 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); @@ -176,11 +192,13 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi, } #endif - /* merge first item (or its part) of src buffer with the last - item of dest buffer. Both are of the same file */ + /* + * 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); + bytes_or_entries, ih_item_body(src, ih), 0); if (is_indirect_le_ih(dih)) { RFALSE(get_ih_free_space(dih), @@ -195,19 +213,23 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi, /* 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 ) + /* + * (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); + ih = item_head(src, src_nr_item - 1); + dih = item_head(dest, 0); - if (!dest_nr_item || !op_is_left_mergeable(&(dih->ih_key), src->b_size)) + if (!dest_nr_item || !op_is_left_mergeable(&dih->ih_key, src->b_size)) return 0; if (is_direntry_le_ih(ih)) { + /* + * bytes_or_entries = entries number in last + * item body of SOURCE + */ 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, @@ -217,9 +239,11 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi, 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 + /* + * 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), @@ -270,15 +294,18 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi, } leaf_paste_in_buffer(dest_bi, 0, 0, bytes_or_entries, - B_I_PITEM(src, + ih_item_body(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 +/* + * 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, @@ -311,11 +338,14 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi, 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 */ + /* + * 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); + ih = item_head(dest, dest_before); RFALSE(blkh_free_space(blkh) < cpy_num * IH_SIZE, "vs-10140: not enough free space for headers %d (needed %d)", @@ -325,7 +355,7 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi, 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); + memcpy(ih, item_head(src, first), cpy_num * IH_SIZE); free_space -= (IH_SIZE * cpy_num); set_blkh_free_space(blkh, free_space); @@ -338,8 +368,8 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi, } /* prepare space for items */ - last_loc = ih_location(&(ih[nr + cpy_num - 1 - dest_before])); - last_inserted_loc = ih_location(&(ih[cpy_num - 1])); + 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, @@ -352,7 +382,8 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi, /* copy items */ memcpy(dest->b_data + last_inserted_loc, - B_N_PITEM(src, (first + cpy_num - 1)), j - last_inserted_loc); + item_body(src, (first + cpy_num - 1)), + j - last_inserted_loc); /* sizes, item number */ set_blkh_nr_item(blkh, nr + cpy_num); @@ -376,8 +407,10 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi, } } -/* This function splits the (liquid) item into two items (useful when - shifting part of an item into another node.) */ +/* + * 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) @@ -389,17 +422,22 @@ static void leaf_item_bottle(struct buffer_info *dest_bi, "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 ) */ - ih = B_N_PITEM_HEAD(src, item_num); + /* + * if ( if item in position item_num in buffer SOURCE + * is directory item ) + */ + ih = item_head(src, item_num); if (is_direntry_le_ih(ih)) 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; + /* + * 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); @@ -411,30 +449,36 @@ static void leaf_item_bottle(struct buffer_info *dest_bi, set_ih_free_space(&n_ih, 0); } - RFALSE(op_is_left_mergeable(&(ih->ih_key), src->b_size), + 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); + item_body(src, item_num), 0); } } else { - /* if ( if item in position item_num in buffer SOURCE is directory item ) */ - ih = B_N_PITEM_HEAD(src, item_num); + /* + * if ( if item in position item_num in buffer + * SOURCE is directory item ) + */ + ih = item_head(src, item_num); if (is_direntry_le_ih(ih)) leaf_copy_dir_entries(dest_bi, src, LAST_TO_FIRST, item_num, - I_ENTRY_COUNT(ih) - cpy_bytes, + ih_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; + /* + * 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 */ + /* Endian safe, both le */ + n_ih.ih_version = ih->ih_version; if (is_direct_le_ih(ih)) { set_le_ih_k_offset(&n_ih, @@ -458,20 +502,22 @@ static void leaf_item_bottle(struct buffer_info *dest_bi, /* set item length */ put_ih_item_len(&n_ih, cpy_bytes); - n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */ + /* Endian safe, both le */ + n_ih.ih_version = ih->ih_version; leaf_insert_into_buf(dest_bi, 0, &n_ih, - B_N_PITEM(src, - item_num) + - ih_item_len(ih) - cpy_bytes, 0); + item_body(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. */ +/* + * 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) { @@ -498,22 +544,34 @@ static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src, 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)) */ + /* + * 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 */ + /* + * 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 */ + /* + * 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 */ + /* + * 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); } @@ -525,7 +583,11 @@ static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src, 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)); */ + /* + * 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; @@ -534,15 +596,24 @@ static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src, 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 */ + /* + * 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; */ + /* + * 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 */ + /* + * 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); } @@ -550,9 +621,11 @@ static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src, 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 */ +/* + * 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, @@ -568,7 +641,9 @@ static void leaf_define_dest_src_infos(int shift_mode, struct tree_balance *tb, 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 */ + + /* src->b_item_order */ + src_bi->bi_position = PATH_H_B_ITEM_ORDER(tb->tb_path, 0); dest_bi->tb = tb; dest_bi->bi_bh = tb->L[0]; dest_bi->bi_parent = tb->FL[0]; @@ -633,8 +708,10 @@ static void leaf_define_dest_src_infos(int shift_mode, struct tree_balance *tb, 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 */ +/* + * 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) { @@ -657,18 +734,24 @@ int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num, 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 */ +/* + * 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) { 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] */ + /* + * 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 */ + /* number of items in S[0] == 0 */ + if (B_NR_ITEMS(S0) == 0) { RFALSE(shift_bytes != -1, "vs-10270: S0 is empty now, but shift_bytes != -1 (%d)", @@ -691,10 +774,10 @@ int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes) 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)))) && + !(is_direntry_le_ih(item_head(S0, 0)) + && !ih_entry_count(item_head(S0, 0)))) && (!op_is_left_mergeable - (B_N_PKEY(S0, 0), S0->b_size)), + (leaf_key(S0, 0), S0->b_size)), "vs-10280: item must be mergeable"); } } @@ -704,13 +787,18 @@ int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes) /* CLEANING STOPPED HERE */ -/* Shift shift_num (shift_bytes) items from S[0] to the right neighbor, and replace the delimiting key */ +/* + * 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) { - // 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] */ + /* + * 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); @@ -725,12 +813,16 @@ int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes) 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 - the first item. Part defined by del_bytes. Don't delete first item header - 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. +/* + * 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 the first item. Part defined by + * del_bytes. Don't delete first item header + * 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) @@ -761,32 +853,43 @@ void leaf_delete_items(struct buffer_info *cur_bi, int last_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 */ + /* + * 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 + /* + * 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 */ + /* + * delete del_num-1 items beginning from + * item in position first+1 + */ leaf_delete_items_entirely(cur_bi, first + 1, del_num - 1); - ih = B_N_PITEM_HEAD(bh, B_NR_ITEMS(bh) - 1); + ih = item_head(bh, B_NR_ITEMS(bh) - 1); if (is_direntry_le_ih(ih)) /* the last item is directory */ - /* len = numbers of directory entries in this item */ + /* + * 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 + /* + * 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); @@ -820,10 +923,10 @@ void leaf_insert_into_buf(struct buffer_info *bi, int before, zeros_number, ih_item_len(inserted_item_ih)); /* get item new item must be inserted before */ - ih = B_N_PITEM_HEAD(bh, before); + ih = item_head(bh, before); /* prepare space for the body of new item */ - last_loc = nr ? ih_location(&(ih[nr - before - 1])) : bh->b_size; + 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), @@ -846,8 +949,8 @@ void leaf_insert_into_buf(struct buffer_info *bi, int before, /* 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); + unmoved_loc -= ih_item_len(&ih[i - before]); + put_ih_location(&ih[i - before], unmoved_loc); } /* sizes, free space, item number */ @@ -867,8 +970,10 @@ void leaf_insert_into_buf(struct buffer_info *bi, int before, } } -/* paste paste_size bytes to affected_item_num-th item. - When item is a directory, this only prepare space for new entries */ +/* + * 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) @@ -902,9 +1007,9 @@ void leaf_paste_in_buffer(struct buffer_info *bi, int affected_item_num, #endif /* CONFIG_REISERFS_CHECK */ /* item to be appended */ - ih = B_N_PITEM_HEAD(bh, affected_item_num); + ih = item_head(bh, affected_item_num); - last_loc = ih_location(&(ih[nr - affected_item_num - 1])); + last_loc = ih_location(&ih[nr - affected_item_num - 1]); unmoved_loc = affected_item_num ? ih_location(ih - 1) : bh->b_size; /* prepare space */ @@ -913,8 +1018,8 @@ void leaf_paste_in_buffer(struct buffer_info *bi, int affected_item_num, /* 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])) - + put_ih_location(&ih[i - affected_item_num], + ih_location(&ih[i - affected_item_num]) - paste_size); if (body) { @@ -957,10 +1062,12 @@ void leaf_paste_in_buffer(struct buffer_info *bi, int affected_item_num, } } -/* 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. */ +/* + * 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) { @@ -971,12 +1078,14 @@ static int leaf_cut_entries(struct buffer_head *bh, int cut_records_len; /* length of all removed records */ int i; - /* make sure, that item is directory and there are enough entries to - remove */ + /* + * 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, + RFALSE(ih_entry_count(ih) < from + del_count, "10185: item contains not enough entries: entry_count = %d, from = %d, to delete = %d", - I_ENTRY_COUNT(ih), from, del_count); + ih_entry_count(ih), from, del_count); if (del_count == 0) return 0; @@ -987,22 +1096,24 @@ static int leaf_cut_entries(struct buffer_head *bh, /* 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) */ + /* + * 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)); + (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])); + 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]), + for (i = ih_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]), + put_deh_location(&deh[i], deh_location(&deh[i]) - (DEH_SIZE * del_count + cut_records_len)); @@ -1021,14 +1132,15 @@ static int leaf_cut_entries(struct buffer_head *bh, 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 - - when cut item is part of directory - pos_in_item - number of first deleted entry - cut_size - count of deleted entries - */ +/* + * 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 + * + * when cut item is part of directory + * 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) { @@ -1043,7 +1155,7 @@ void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num, nr = blkh_nr_item(blkh); /* item head of truncated item */ - ih = B_N_PITEM_HEAD(bh, cut_item_num); + ih = item_head(bh, cut_item_num); if (is_direntry_le_ih(ih)) { /* first cut entry () */ @@ -1055,7 +1167,6 @@ void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num, 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 */ @@ -1089,7 +1200,7 @@ void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num, } /* location of the last item */ - last_loc = ih_location(&(ih[nr - cut_item_num - 1])); + 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; @@ -1108,7 +1219,7 @@ void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num, /* change locations */ for (i = cut_item_num; i < nr; i++) - put_ih_location(&(ih[i - cut_item_num]), + put_ih_location(&ih[i - cut_item_num], ih_location(&ih[i - cut_item_num]) + cut_size); /* size, free space */ @@ -1156,14 +1267,14 @@ static void leaf_delete_items_entirely(struct buffer_info *bi, return; } - ih = B_N_PITEM_HEAD(bh, first); + ih = item_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])); + 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); @@ -1173,8 +1284,8 @@ static void leaf_delete_items_entirely(struct buffer_info *bi, /* change item location */ for (i = first; i < nr - del_num; i++) - put_ih_location(&(ih[i - first]), - ih_location(&(ih[i - first])) + (j - + put_ih_location(&ih[i - first], + ih_location(&ih[i - first]) + (j - last_removed_loc)); /* sizes, item number */ @@ -1195,7 +1306,10 @@ static void leaf_delete_items_entirely(struct buffer_info *bi, } } -/* paste new_entry_count entries (new_dehs, records) into position before to item_num-th item */ +/* + * paste new_entry_count entries (new_dehs, records) into position + * before to item_num-th item + */ void leaf_paste_entries(struct buffer_info *bi, int item_num, int before, @@ -1213,13 +1327,16 @@ void leaf_paste_entries(struct buffer_info *bi, if (new_entry_count == 0) return; - ih = B_N_PITEM_HEAD(bh, item_num); + ih = item_head(bh, item_num); - /* make sure, that item is directory, and there are enough records in it */ + /* + * 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, + RFALSE(ih_entry_count(ih) < before, "10230: there are no entry we paste entries before. entry_count = %d, before = %d", - I_ENTRY_COUNT(ih), before); + ih_entry_count(ih), before); /* first byte of dest item */ item = bh->b_data + ih_location(ih); @@ -1230,21 +1347,21 @@ void leaf_paste_entries(struct buffer_info *bi, /* new records will be pasted at this point */ insert_point = item + - (before ? deh_location(&(deh[before - 1])) + (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])) + + for (i = ih_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); + put_deh_location(&deh[i], + deh_location(&deh[i]) + paste_size); - old_entry_num = I_ENTRY_COUNT(ih); + old_entry_num = ih_entry_count(ih); put_ih_entry_count(ih, ih_entry_count(ih) + new_entry_count); /* prepare space for pasted records */ @@ -1266,10 +1383,10 @@ void leaf_paste_entries(struct buffer_info *bi, /* set locations of new records */ for (i = 0; i < new_entry_count; i++) { - put_deh_location(&(deh[i]), - deh_location(&(deh[i])) + + put_deh_location(&deh[i], + deh_location(&deh[i]) + (-deh_location - (&(new_dehs[new_entry_count - 1])) + + (&new_dehs[new_entry_count - 1]) + insert_point + DEH_SIZE * new_entry_count - item)); } @@ -1277,28 +1394,26 @@ void leaf_paste_entries(struct buffer_info *bi, /* 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++) { + for (i = 0; i < ih_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; + ih_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]))) + if (prev && prev <= deh_location(&deh[i])) reiserfs_error(sb_from_bi(bi), "vs-10240", "directory item (%h) " "corrupted (prev %a, " "cur(%d) %a)", ih, deh + i - 1, i, deh + i); - if (next && next >= deh_location(&(deh[i]))) + if (next && next >= deh_location(&deh[i])) reiserfs_error(sb_from_bi(bi), "vs-10250", "directory item (%h) " "corrupted (cur(%d) %a, " |
