diff options
Diffstat (limited to 'fs/reiserfs/do_balan.c')
| -rw-r--r-- | fs/reiserfs/do_balan.c | 3236 |
1 files changed, 1888 insertions, 1348 deletions
diff --git a/fs/reiserfs/do_balan.c b/fs/reiserfs/do_balan.c index 2118db2..b2264ba 100644 --- a/fs/reiserfs/do_balan.c +++ b/fs/reiserfs/do_balan.c @@ -8,7 +8,6 @@ /* balance the tree according to the analysis made before, */ /* and using buffers obtained after all above. */ - /** ** balance_leaf_when_delete ** balance_leaf @@ -24,23 +23,22 @@ #ifdef CONFIG_REISERFS_CHECK -struct tree_balance * cur_tb = NULL; /* detects whether more than one - copy of tb exists as a means - of checking whether schedule - is interrupting do_balance */ +struct tree_balance *cur_tb = NULL; /* detects whether more than one + copy of tb exists as a means + of checking whether schedule + is interrupting do_balance */ #endif -inline void do_balance_mark_leaf_dirty (struct tree_balance * tb, - struct buffer_head * bh, int flag) +inline void do_balance_mark_leaf_dirty(struct tree_balance *tb, + struct buffer_head *bh, int flag) { - journal_mark_dirty(tb->transaction_handle, - tb->transaction_handle->t_super, bh) ; + journal_mark_dirty(tb->transaction_handle, + tb->transaction_handle->t_super, bh); } #define do_balance_mark_internal_dirty do_balance_mark_leaf_dirty #define do_balance_mark_sb_dirty do_balance_mark_leaf_dirty - /* summary: if deleting something ( tb->insert_size[0] < 0 ) return(balance_leaf_when_delete()); (flag d handled here) @@ -64,8 +62,6 @@ be performed by do_balance. -Hans */ - - /* Balance leaf node in case of delete or cut: insert_size[0] < 0 * * lnum, rnum can have values >= -1 @@ -73,1384 +69,1933 @@ be performed by do_balance. * 0 means that nothing should be done with the neighbor * >0 means to shift entirely or partly the specified number of items to the neighbor */ -static int balance_leaf_when_delete (struct tree_balance * tb, int flag) +static int balance_leaf_when_delete(struct tree_balance *tb, int flag) { - struct buffer_head * tbS0 = PATH_PLAST_BUFFER (tb->tb_path); - int item_pos = PATH_LAST_POSITION (tb->tb_path); - int pos_in_item = tb->tb_path->pos_in_item; - struct buffer_info bi; - int n; - struct item_head * ih; + struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path); + int item_pos = PATH_LAST_POSITION(tb->tb_path); + int pos_in_item = tb->tb_path->pos_in_item; + struct buffer_info bi; + int n; + struct item_head *ih; - RFALSE( tb->FR[0] && B_LEVEL (tb->FR[0]) != DISK_LEAF_NODE_LEVEL + 1, - "vs- 12000: level: wrong FR %z", tb->FR[0]); - RFALSE( tb->blknum[0] > 1, - "PAP-12005: tb->blknum == %d, can not be > 1", tb->blknum[0]); - RFALSE( ! tb->blknum[0] && ! PATH_H_PPARENT(tb->tb_path, 0), - "PAP-12010: tree can not be empty"); + RFALSE(tb->FR[0] && B_LEVEL(tb->FR[0]) != DISK_LEAF_NODE_LEVEL + 1, + "vs- 12000: level: wrong FR %z", tb->FR[0]); + RFALSE(tb->blknum[0] > 1, + "PAP-12005: tb->blknum == %d, can not be > 1", tb->blknum[0]); + RFALSE(!tb->blknum[0] && !PATH_H_PPARENT(tb->tb_path, 0), + "PAP-12010: tree can not be empty"); - ih = B_N_PITEM_HEAD (tbS0, item_pos); + ih = B_N_PITEM_HEAD(tbS0, item_pos); - /* Delete or truncate the item */ + /* Delete or truncate the item */ - switch (flag) { - case M_DELETE: /* delete item in S[0] */ + switch (flag) { + case M_DELETE: /* delete item in S[0] */ + + RFALSE(ih_item_len(ih) + IH_SIZE != -tb->insert_size[0], + "vs-12013: mode Delete, insert size %d, ih to be deleted %h", + -tb->insert_size[0], ih); + + bi.tb = tb; + bi.bi_bh = tbS0; + bi.bi_parent = PATH_H_PPARENT(tb->tb_path, 0); + bi.bi_position = PATH_H_POSITION(tb->tb_path, 1); + leaf_delete_items(&bi, 0, item_pos, 1, -1); + + if (!item_pos && tb->CFL[0]) { + if (B_NR_ITEMS(tbS0)) { + replace_key(tb, tb->CFL[0], tb->lkey[0], tbS0, + 0); + } else { + if (!PATH_H_POSITION(tb->tb_path, 1)) + replace_key(tb, tb->CFL[0], tb->lkey[0], + PATH_H_PPARENT(tb->tb_path, + 0), 0); + } + } - RFALSE( ih_item_len(ih) + IH_SIZE != -tb->insert_size[0], - "vs-12013: mode Delete, insert size %d, ih to be deleted %h", - -tb->insert_size [0], ih); + RFALSE(!item_pos && !tb->CFL[0], + "PAP-12020: tb->CFL[0]==%p, tb->L[0]==%p", tb->CFL[0], + tb->L[0]); - bi.tb = tb; - bi.bi_bh = tbS0; - bi.bi_parent = PATH_H_PPARENT (tb->tb_path, 0); - bi.bi_position = PATH_H_POSITION (tb->tb_path, 1); - leaf_delete_items (&bi, 0, item_pos, 1, -1); - - if ( ! item_pos && tb->CFL[0] ) { - if ( B_NR_ITEMS(tbS0) ) { - replace_key(tb, tb->CFL[0],tb->lkey[0],tbS0,0); - } - else { - if ( ! PATH_H_POSITION (tb->tb_path, 1) ) - replace_key(tb, tb->CFL[0],tb->lkey[0],PATH_H_PPARENT(tb->tb_path, 0),0); - } - } - - RFALSE( ! item_pos && !tb->CFL[0], - "PAP-12020: tb->CFL[0]==%p, tb->L[0]==%p", tb->CFL[0], tb->L[0]); - - break; - - case M_CUT: { /* cut item in S[0] */ - bi.tb = tb; - bi.bi_bh = tbS0; - bi.bi_parent = PATH_H_PPARENT (tb->tb_path, 0); - bi.bi_position = PATH_H_POSITION (tb->tb_path, 1); - if (is_direntry_le_ih (ih)) { - - /* UFS unlink semantics are such that you can only delete one directory entry at a time. */ - /* when we cut a directory tb->insert_size[0] means number of entries to be cut (always 1) */ - tb->insert_size[0] = -1; - leaf_cut_from_buffer (&bi, item_pos, pos_in_item, -tb->insert_size[0]); - - RFALSE( ! item_pos && ! pos_in_item && ! tb->CFL[0], - "PAP-12030: can not change delimiting key. CFL[0]=%p", - tb->CFL[0]); - - if ( ! item_pos && ! pos_in_item && tb->CFL[0] ) { - replace_key(tb, tb->CFL[0],tb->lkey[0],tbS0,0); - } - } else { - leaf_cut_from_buffer (&bi, item_pos, pos_in_item, -tb->insert_size[0]); - - RFALSE( ! ih_item_len(ih), - "PAP-12035: cut must leave non-zero dynamic length of item"); - } - break; - } - - default: - print_cur_tb ("12040"); - reiserfs_panic (tb->tb_sb, "PAP-12040: balance_leaf_when_delete: unexpectable mode: %s(%d)", - (flag == M_PASTE) ? "PASTE" : ((flag == M_INSERT) ? "INSERT" : "UNKNOWN"), flag); - } - - /* the rule is that no shifting occurs unless by shifting a node can be freed */ - n = B_NR_ITEMS(tbS0); - if ( tb->lnum[0] ) /* L[0] takes part in balancing */ - { - if ( tb->lnum[0] == -1 ) /* L[0] must be joined with S[0] */ - { - if ( tb->rnum[0] == -1 ) /* R[0] must be also joined with S[0] */ - { - if ( tb->FR[0] == PATH_H_PPARENT(tb->tb_path, 0) ) - { - /* all contents of all the 3 buffers will be in L[0] */ - if ( PATH_H_POSITION (tb->tb_path, 1) == 0 && 1 < B_NR_ITEMS(tb->FR[0]) ) - replace_key(tb, tb->CFL[0],tb->lkey[0],tb->FR[0],1); - - leaf_move_items (LEAF_FROM_S_TO_L, tb, n, -1, NULL); - leaf_move_items (LEAF_FROM_R_TO_L, tb, B_NR_ITEMS(tb->R[0]), -1, NULL); - - reiserfs_invalidate_buffer (tb, tbS0); - reiserfs_invalidate_buffer (tb, tb->R[0]); - - return 0; + break; + + case M_CUT:{ /* cut item in S[0] */ + bi.tb = tb; + bi.bi_bh = tbS0; + bi.bi_parent = PATH_H_PPARENT(tb->tb_path, 0); + bi.bi_position = PATH_H_POSITION(tb->tb_path, 1); + if (is_direntry_le_ih(ih)) { + + /* UFS unlink semantics are such that you can only delete one directory entry at a time. */ + /* when we cut a directory tb->insert_size[0] means number of entries to be cut (always 1) */ + tb->insert_size[0] = -1; + leaf_cut_from_buffer(&bi, item_pos, pos_in_item, + -tb->insert_size[0]); + + RFALSE(!item_pos && !pos_in_item && !tb->CFL[0], + "PAP-12030: can not change delimiting key. CFL[0]=%p", + tb->CFL[0]); + + if (!item_pos && !pos_in_item && tb->CFL[0]) { + replace_key(tb, tb->CFL[0], tb->lkey[0], + tbS0, 0); + } + } else { + leaf_cut_from_buffer(&bi, item_pos, pos_in_item, + -tb->insert_size[0]); + + RFALSE(!ih_item_len(ih), + "PAP-12035: cut must leave non-zero dynamic length of item"); + } + break; } - /* all contents of all the 3 buffers will be in R[0] */ - leaf_move_items (LEAF_FROM_S_TO_R, tb, n, -1, NULL); - leaf_move_items (LEAF_FROM_L_TO_R, tb, B_NR_ITEMS(tb->L[0]), -1, NULL); - /* right_delimiting_key is correct in R[0] */ - replace_key(tb, tb->CFR[0],tb->rkey[0],tb->R[0],0); + default: + print_cur_tb("12040"); + reiserfs_panic(tb->tb_sb, + "PAP-12040: balance_leaf_when_delete: unexpectable mode: %s(%d)", + (flag == + M_PASTE) ? "PASTE" : ((flag == + M_INSERT) ? "INSERT" : + "UNKNOWN"), flag); + } - reiserfs_invalidate_buffer (tb, tbS0); - reiserfs_invalidate_buffer (tb, tb->L[0]); + /* the rule is that no shifting occurs unless by shifting a node can be freed */ + n = B_NR_ITEMS(tbS0); + if (tb->lnum[0]) { /* L[0] takes part in balancing */ + if (tb->lnum[0] == -1) { /* L[0] must be joined with S[0] */ + if (tb->rnum[0] == -1) { /* R[0] must be also joined with S[0] */ + if (tb->FR[0] == PATH_H_PPARENT(tb->tb_path, 0)) { + /* all contents of all the 3 buffers will be in L[0] */ + if (PATH_H_POSITION(tb->tb_path, 1) == 0 + && 1 < B_NR_ITEMS(tb->FR[0])) + replace_key(tb, tb->CFL[0], + tb->lkey[0], + tb->FR[0], 1); + + leaf_move_items(LEAF_FROM_S_TO_L, tb, n, + -1, NULL); + leaf_move_items(LEAF_FROM_R_TO_L, tb, + B_NR_ITEMS(tb->R[0]), + -1, NULL); + + reiserfs_invalidate_buffer(tb, tbS0); + reiserfs_invalidate_buffer(tb, + tb->R[0]); + + return 0; + } + /* all contents of all the 3 buffers will be in R[0] */ + leaf_move_items(LEAF_FROM_S_TO_R, tb, n, -1, + NULL); + leaf_move_items(LEAF_FROM_L_TO_R, tb, + B_NR_ITEMS(tb->L[0]), -1, NULL); + + /* right_delimiting_key is correct in R[0] */ + replace_key(tb, tb->CFR[0], tb->rkey[0], + tb->R[0], 0); - return -1; - } + reiserfs_invalidate_buffer(tb, tbS0); + reiserfs_invalidate_buffer(tb, tb->L[0]); - RFALSE( tb->rnum[0] != 0, - "PAP-12045: rnum must be 0 (%d)", tb->rnum[0]); - /* all contents of L[0] and S[0] will be in L[0] */ - leaf_shift_left(tb, n, -1); + return -1; + } - reiserfs_invalidate_buffer (tb, tbS0); + RFALSE(tb->rnum[0] != 0, + "PAP-12045: rnum must be 0 (%d)", tb->rnum[0]); + /* all contents of L[0] and S[0] will be in L[0] */ + leaf_shift_left(tb, n, -1); - return 0; + reiserfs_invalidate_buffer(tb, tbS0); + + return 0; + } + /* a part of contents of S[0] will be in L[0] and the rest part of S[0] will be in R[0] */ + + RFALSE((tb->lnum[0] + tb->rnum[0] < n) || + (tb->lnum[0] + tb->rnum[0] > n + 1), + "PAP-12050: rnum(%d) and lnum(%d) and item number(%d) in S[0] are not consistent", + tb->rnum[0], tb->lnum[0], n); + RFALSE((tb->lnum[0] + tb->rnum[0] == n) && + (tb->lbytes != -1 || tb->rbytes != -1), + "PAP-12055: bad rbytes (%d)/lbytes (%d) parameters when items are not split", + tb->rbytes, tb->lbytes); + RFALSE((tb->lnum[0] + tb->rnum[0] == n + 1) && + (tb->lbytes < 1 || tb->rbytes != -1), + "PAP-12060: bad rbytes (%d)/lbytes (%d) parameters when items are split", + tb->rbytes, tb->lbytes); + + leaf_shift_left(tb, tb->lnum[0], tb->lbytes); + leaf_shift_right(tb, tb->rnum[0], tb->rbytes); + + reiserfs_invalidate_buffer(tb, tbS0); + + return 0; } - /* a part of contents of S[0] will be in L[0] and the rest part of S[0] will be in R[0] */ - - RFALSE( ( tb->lnum[0] + tb->rnum[0] < n ) || - ( tb->lnum[0] + tb->rnum[0] > n+1 ), - "PAP-12050: rnum(%d) and lnum(%d) and item number(%d) in S[0] are not consistent", - tb->rnum[0], tb->lnum[0], n); - RFALSE( ( tb->lnum[0] + tb->rnum[0] == n ) && - (tb->lbytes != -1 || tb->rbytes != -1), - "PAP-12055: bad rbytes (%d)/lbytes (%d) parameters when items are not split", - tb->rbytes, tb->lbytes); - RFALSE( ( tb->lnum[0] + tb->rnum[0] == n + 1 ) && - (tb->lbytes < 1 || tb->rbytes != -1), - "PAP-12060: bad rbytes (%d)/lbytes (%d) parameters when items are split", - tb->rbytes, tb->lbytes); - - leaf_shift_left (tb, tb->lnum[0], tb->lbytes); - leaf_shift_right(tb, tb->rnum[0], tb->rbytes); - - reiserfs_invalidate_buffer (tb, tbS0); - return 0; - } + if (tb->rnum[0] == -1) { + /* all contents of R[0] and S[0] will be in R[0] */ + leaf_shift_right(tb, n, -1); + reiserfs_invalidate_buffer(tb, tbS0); + return 0; + } - if ( tb->rnum[0] == -1 ) { - /* all contents of R[0] and S[0] will be in R[0] */ - leaf_shift_right(tb, n, -1); - reiserfs_invalidate_buffer (tb, tbS0); + RFALSE(tb->rnum[0], + "PAP-12065: bad rnum parameter must be 0 (%d)", tb->rnum[0]); return 0; - } - - RFALSE( tb->rnum[0], - "PAP-12065: bad rnum parameter must be 0 (%d)", tb->rnum[0]); - return 0; } - -static int balance_leaf (struct tree_balance * tb, - struct item_head * ih, /* item header of inserted item (this is on little endian) */ - const char * body, /* body of inserted item or bytes to paste */ - int flag, /* i - insert, d - delete, c - cut, p - paste - (see comment to do_balance) */ - struct item_head * insert_key, /* in our processing of one level we sometimes determine what - must be inserted into the next higher level. This insertion - consists of a key or two keys and their corresponding - pointers */ - struct buffer_head ** insert_ptr /* inserted node-ptrs for the next level */ +static int balance_leaf(struct tree_balance *tb, struct item_head *ih, /* item header of inserted item (this is on little endian) */ + const char *body, /* body of inserted item or bytes to paste */ + int flag, /* i - insert, d - delete, c - cut, p - paste + (see comment to do_balance) */ + struct item_head *insert_key, /* in our processing of one level we sometimes determine what + must be inserted into the next higher level. This insertion + consists of a key or two keys and their corresponding + pointers */ + struct buffer_head **insert_ptr /* inserted node-ptrs for the next level */ ) { - struct buffer_head * tbS0 = PATH_PLAST_BUFFER (tb->tb_path); - int item_pos = PATH_LAST_POSITION (tb->tb_path); /* index into the array of item headers in S[0] - of the affected item */ - struct buffer_info bi; - struct buffer_head *S_new[2]; /* new nodes allocated to hold what could not fit into S */ - int snum[2]; /* number of items that will be placed - into S_new (includes partially shifted - items) */ - int sbytes[2]; /* if an item is partially shifted into S_new then - if it is a directory item - it is the number of entries from the item that are shifted into S_new - else - it is the number of bytes from the item that are shifted into S_new - */ - int n, i; - int ret_val; - int pos_in_item; - int zeros_num; - - PROC_INFO_INC( tb -> tb_sb, balance_at[ 0 ] ); - - /* Make balance in case insert_size[0] < 0 */ - if ( tb->insert_size[0] < 0 ) - return balance_leaf_when_delete (tb, flag); - - zeros_num = 0; - if (flag == M_INSERT && body == 0) - zeros_num = ih_item_len( ih ); - - pos_in_item = tb->tb_path->pos_in_item; - /* for indirect item pos_in_item is measured in unformatted node - pointers. Recalculate to bytes */ - if (flag != M_INSERT && is_indirect_le_ih (B_N_PITEM_HEAD (tbS0, item_pos))) - pos_in_item *= UNFM_P_SIZE; - - if ( tb->lnum[0] > 0 ) { - /* Shift lnum[0] items from S[0] to the left neighbor L[0] */ - if ( item_pos < tb->lnum[0] ) { - /* new item or it part falls to L[0], shift it too */ - n = B_NR_ITEMS(tb->L[0]); - - switch (flag) { - case M_INSERT: /* insert item into L[0] */ - - if ( item_pos == tb->lnum[0] - 1 && tb->lbytes != -1 ) { - /* part of new item falls into L[0] */ - int new_item_len; - int version; - - ret_val = leaf_shift_left (tb, tb->lnum[0]-1, -1); - - /* Calculate item length to insert to S[0] */ - new_item_len = ih_item_len(ih) - tb->lbytes; - /* Calculate and check item length to insert to L[0] */ - put_ih_item_len(ih, ih_item_len(ih) - new_item_len ); - - RFALSE( ih_item_len(ih) <= 0, - "PAP-12080: there is nothing to insert into L[0]: ih_item_len=%d", - ih_item_len(ih)); - - /* Insert new item into L[0] */ - bi.tb = tb; - bi.bi_bh = tb->L[0]; - bi.bi_parent = tb->FL[0]; - bi.bi_position = get_left_neighbor_position (tb, 0); - leaf_insert_into_buf (&bi, n + item_pos - ret_val, ih, body, - zeros_num > ih_item_len(ih) ? ih_item_len(ih) : zeros_num); - - version = ih_version (ih); - - /* Calculate key component, item length and body to insert into S[0] */ - set_le_ih_k_offset( ih, le_ih_k_offset( ih ) + (tb->lbytes << (is_indirect_le_ih(ih)?tb->tb_sb->s_blocksize_bits - UNFM_P_SHIFT:0)) ); - - put_ih_item_len( ih, new_item_len ); - if ( tb->lbytes > zeros_num ) { - body += (tb->lbytes - zeros_num); - zeros_num = 0; - } - else - zeros_num -= tb->lbytes; - - RFALSE( ih_item_len(ih) <= 0, - "PAP-12085: there is nothing to insert into S[0]: ih_item_len=%d", - ih_item_len(ih)); - } else { - /* new item in whole falls into L[0] */ - /* Shift lnum[0]-1 items to L[0] */ - ret_val = leaf_shift_left(tb, tb->lnum[0]-1, tb->lbytes); - /* Insert new item into L[0] */ - bi.tb = tb; - bi.bi_bh = tb->L[0]; - bi.bi_parent = tb->FL[0]; - bi.bi_position = get_left_neighbor_position (tb, 0); - leaf_insert_into_buf (&bi, n + item_pos - ret_val, ih, body, zeros_num); - tb->insert_size[0] = 0; - zeros_num = 0; - } - break; - - case M_PASTE: /* append item in L[0] */ - - if ( item_pos == tb->lnum[0] - 1 && tb->lbytes != -1 ) { - /* we must shift the part of the appended item */ - if ( is_direntry_le_ih (B_N_PITEM_HEAD (tbS0, item_pos))) { - - RFALSE( zeros_num, - "PAP-12090: invalid parameter in case of a directory"); - /* directory item */ - if ( tb->lbytes > pos_in_item ) { - /* new directory entry falls into L[0] */ - struct item_head * pasted; - int l_pos_in_item = pos_in_item; - - /* Shift lnum[0] - 1 items in whole. Shift lbytes - 1 entries from given directory item */ - ret_val = leaf_shift_left(tb, tb->lnum[0], tb->lbytes - 1); - if ( ret_val && ! item_pos ) { - pasted = B_N_PITEM_HEAD(tb->L[0],B_NR_ITEMS(tb->L[0])-1); - l_pos_in_item += I_ENTRY_COUNT(pasted) - (tb->lbytes-1); - } - - /* Append given directory entry to directory item */ - bi.tb = tb; - bi.bi_bh = tb->L[0]; - bi.bi_parent = tb->FL[0]; - bi.bi_position = get_left_neighbor_position (tb, 0); - leaf_paste_in_buffer (&bi, n + item_pos - ret_val, l_pos_in_item, - tb->insert_size[0], body, zeros_num); - - /* previous string prepared space for pasting new entry, following string pastes this entry */ - - /* when we have merge directory item, pos_in_item has been changed too */ - - /* paste new directory entry. 1 is entry number */ - leaf_paste_entries (bi.bi_bh, n + item_pos - ret_val, l_pos_in_item, 1, - (struct reiserfs_de_head *)body, - body + DEH_SIZE, tb->insert_size[0] - ); - tb->insert_size[0] = 0; - } else { - /* new directory item doesn't fall into L[0] */ - /* Shift lnum[0]-1 items in whole. Shift lbytes directory entries from directory item number lnum[0] */ - leaf_shift_left (tb, tb->lnum[0], tb->lbytes); - } - /* Calculate new position to append in item body */ - pos_in_item -= tb->lbytes; - } - else { - /* regular object */ - RFALSE( tb->lbytes <= 0, - "PAP-12095: there is nothing to shift to L[0]. lbytes=%d", - tb->lbytes); - RFALSE( pos_in_item != ih_item_len(B_N_PITEM_HEAD(tbS0, item_pos)), - "PAP-12100: incorrect position to paste: item_len=%d, pos_in_item=%d", - ih_item_len(B_N_PITEM_HEAD(tbS0,item_pos)), pos_in_item); - - if ( tb->lbytes >= pos_in_item ) { - /* appended item will be in L[0] in whole */ - int l_n; - - /* this bytes number must be appended to the last item of L[h] */ - l_n = tb->lbytes - pos_in_item; - - /* Calculate new insert_size[0] */ - tb->insert_size[0] -= l_n; - - RFALSE( tb->insert_size[0] <= 0, - "PAP-12105: there is nothing to paste into L[0]. insert_size=%d", - tb->insert_size[0]); - ret_val = leaf_shift_left(tb,tb->lnum[0], - ih_item_len(B_N_PITEM_HEAD(tbS0,item_pos))); - /* Append to body of item in L[0] */ - bi.tb = tb; - bi.bi_bh = tb->L[0]; - bi.bi_parent = tb->FL[0]; - bi.bi_position = get_left_neighbor_position (tb, 0); - leaf_paste_in_buffer( - &bi,n + item_pos - ret_val, - ih_item_len( B_N_PITEM_HEAD(tb->L[0],n+item_pos-ret_val)), - l_n,body, zeros_num > l_n ? l_n : zeros_num - ); - /* 0-th item in S0 can be only of DIRECT type when l_n != 0*/ - { - int version; - int temp_l = l_n; - - RFALSE (ih_item_len (B_N_PITEM_HEAD (tbS0, 0)), - "PAP-12106: item length must be 0"); - RFALSE (comp_short_le_keys (B_N_PKEY (tbS0, 0), - B_N_PKEY (tb->L[0], - n + item_pos - ret_val)), - "PAP-12107: items must be of the same file"); - if (is_indirect_le_ih(B_N_PITEM_HEAD (tb->L[0], - n + item_pos - ret_val))) { - temp_l = l_n << (tb->tb_sb->s_blocksize_bits - UNFM_P_SHIFT); + struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path); + int item_pos = PATH_LAST_POSITION(tb->tb_path); /* index into the array of item headers in S[0] + of the affected item */ + struct buffer_info bi; + struct buffer_head *S_new[2]; /* new nodes allocated to hold what could not fit into S */ + int snum[2]; /* number of items that will be placed + into S_new (includes partially shifted + items) */ + int sbytes[2]; /* if an item is partially shifted into S_new then + if it is a directory item + it is the number of entries from the item that are shifted into S_new + else + it is the number of bytes from the item that are shifted into S_new + */ + int n, i; + int ret_val; + int pos_in_item; + int zeros_num; + + PROC_INFO_INC(tb->tb_sb, balance_at[0]); + + /* Make balance in case insert_size[0] < 0 */ + if (tb->insert_size[0] < 0) + return balance_leaf_when_delete(tb, flag); + + zeros_num = 0; + if (flag == M_INSERT && body == 0) + zeros_num = ih_item_len(ih); + + pos_in_item = tb->tb_path->pos_in_item; + /* for indirect item pos_in_item is measured in unformatted node + pointers. Recalculate to bytes */ + if (flag != M_INSERT + && is_indirect_le_ih(B_N_PITEM_HEAD(tbS0, item_pos))) + pos_in_item *= UNFM_P_SIZE; + + if (tb->lnum[0] > 0) { + /* Shift lnum[0] items from S[0] to the left neighbor L[0] */ + if (item_pos < tb->lnum[0]) { + /* new item or it part falls to L[0], shift it too */ + n = B_NR_ITEMS(tb->L[0]); + + switch (flag) { + case M_INSERT: /* insert item into L[0] */ + + if (item_pos == tb->lnum[0] - 1 + && tb->lbytes != -1) { + /* part of new item falls into L[0] */ + int new_item_len; + int version; + + ret_val = + leaf_shift_left(tb, tb->lnum[0] - 1, + -1); + + /* Calculate item length to insert to S[0] */ + new_item_len = + ih_item_len(ih) - tb->lbytes; + /* Calculate and check item length to insert to L[0] */ + put_ih_item_len(ih, + ih_item_len(ih) - + new_item_len); + + RFALSE(ih_item_len(ih) <= 0, + "PAP-12080: there is nothing to insert into L[0]: ih_item_len=%d", + ih_item_len(ih)); + + /* Insert new item into L[0] */ + bi.tb = tb; + bi.bi_bh = tb->L[0]; + bi.bi_parent = tb->FL[0]; + bi.bi_position = + get_left_neighbor_position(tb, 0); + leaf_insert_into_buf(&bi, + n + item_pos - + ret_val, ih, body, + zeros_num > + ih_item_len(ih) ? + ih_item_len(ih) : + zeros_num); + + version = ih_version(ih); + + /* Calculate key component, item length and body to insert into S[0] */ + set_le_ih_k_offset(ih, + le_ih_k_offset(ih) + + (tb-> + lbytes << + (is_indirect_le_ih + (ih) ? tb->tb_sb-> + s_blocksize_bits - + UNFM_P_SHIFT : + 0))); + + put_ih_item_len(ih, new_item_len); + if (tb->lbytes > zeros_num) { + body += + (tb->lbytes - zeros_num); + zeros_num = 0; + } else + zeros_num -= tb->lbytes; + + RFALSE(ih_item_len(ih) <= 0, + "PAP-12085: there is nothing to insert into S[0]: ih_item_len=%d", + ih_item_len(ih)); + } else { + /* new item in whole falls into L[0] */ + /* Shift lnum[0]-1 items to L[0] */ + ret_val = + leaf_shift_left(tb, tb->lnum[0] - 1, + tb->lbytes); + /* Insert new item into L[0] */ + bi.tb = tb; + bi.bi_bh = tb->L[0]; + bi.bi_parent = tb->FL[0]; + bi.bi_position = + get_left_neighbor_position(tb, 0); + leaf_insert_into_buf(&bi, + n + item_pos - + ret_val, ih, body, + zeros_num); + tb->insert_size[0] = 0; + zeros_num = 0; } - /* update key of first item in S0 */ - version = ih_version (B_N_PITEM_HEAD (tbS0, 0)); - set_le_key_k_offset (version, B_N_PKEY (tbS0, 0), - le_key_k_offset (version, B_N_PKEY (tbS0, 0)) + temp_l); - /* update left delimiting key */ - set_le_key_k_offset (version, B_N_PDELIM_KEY(tb->CFL[0],tb->lkey[0]), - le_key_k_offset (version, B_N_PDELIM_KEY(tb->CFL[0],tb->lkey[0])) + temp_l); - } - - /* Calculate new body, position in item and insert_size[0] */ - if ( l_n > zeros_num ) { - body += (l_n - zeros_num); - zeros_num = 0; - } - else - zeros_num -= l_n; - pos_in_item = 0; - - RFALSE( comp_short_le_keys - (B_N_PKEY(tbS0,0), - B_N_PKEY(tb->L[0],B_NR_ITEMS(tb->L[0])-1)) || - - !op_is_left_mergeable - (B_N_PKEY (tbS0, 0), tbS0->b_size) || - !op_is_left_mergeable - (B_N_PDELIM_KEY(tb->CFL[0],tb->lkey[0]), - tbS0->b_size), - "PAP-12120: item must be merge-able with left neighboring item"); - } - else /* only part of the appended item will be in L[0] */ - { - /* Calculate position in item for append in S[0] */ - pos_in_item -= tb->lbytes; - - RFALSE( pos_in_item <= 0, - "PAP-12125: no place for paste. pos_in_item=%d", pos_in_item); - - /* Shift lnum[0] - 1 items in whole. Shift lbytes - 1 byte from item number lnum[0] */ - leaf_shift_left(tb,tb->lnum[0],tb->lbytes); - } - } - } - else /* appended item will be in L[0] in whole */ - { - struct item_head * pasted; - - if ( ! item_pos && op_is_left_mergeable (B_N_PKEY (tbS0, 0), tbS0->b_size) ) - { /* if we paste into first item of S[0] and it is left mergable */ - /* then increment pos_in_item by the size of the last item in L[0] */ - pasted = B_N_PITEM_HEAD(tb->L[0],n-1); - if ( is_direntry_le_ih (pasted) ) - pos_in_item += ih_entry_count(pasted); - else - pos_in_item += ih_item_len(pasted); + break; + + case M_PASTE: /* append item in L[0] */ + + if (item_pos == tb->lnum[0] - 1 + && tb->lbytes != -1) { + /* we must shift the part of the appended item */ + if (is_direntry_le_ih + (B_N_PITEM_HEAD(tbS0, item_pos))) { + + RFALSE(zeros_num, + "PAP-12090: invalid parameter in case of a directory"); + /* directory item */ + if (tb->lbytes > pos_in_item) { + /* new directory entry falls into L[0] */ + struct item_head + *pasted; + int l_pos_in_item = + pos_in_item; + + /* Shift lnum[0] - 1 items in whole. Shift lbytes - 1 entries from given directory item */ + ret_val = + leaf_shift_left(tb, + tb-> + lnum + [0], + tb-> + lbytes + - + 1); + if (ret_val + && !item_pos) { + pasted = + B_N_PITEM_HEAD + (tb->L[0], + B_NR_ITEMS + (tb-> + L[0]) - + 1); + l_pos_in_item += + I_ENTRY_COUNT + (pasted) - + (tb-> + lbytes - + 1); + } + + /* Append given directory entry to directory item */ + bi.tb = tb; + bi.bi_bh = tb->L[0]; + bi.bi_parent = + tb->FL[0]; + bi.bi_position = + get_left_neighbor_position + (tb, 0); + leaf_paste_in_buffer + (&bi, + n + item_pos - + ret_val, + l_pos_in_item, + tb->insert_size[0], + body, zeros_num); + + /* previous string prepared space for pasting new entry, following string pastes this entry */ + + /* when we have merge directory item, pos_in_item has been changed too */ + + /* paste new directory entry. 1 is entry number */ + leaf_paste_entries(bi. + bi_bh, + n + + item_pos + - + ret_val, + l_pos_in_item, + 1, + (struct + reiserfs_de_head + *) + body, + body + + + DEH_SIZE, + tb-> + insert_size + [0] + ); + tb->insert_size[0] = 0; + } else { + /* new directory item doesn't fall into L[0] */ + /* Shift lnum[0]-1 items in whole. Shift lbytes directory entries from directory item number lnum[0] */ + leaf_shift_left(tb, + tb-> + lnum[0], + tb-> + lbytes); + } + /* Calculate new position to append in item body */ + pos_in_item -= tb->lbytes; + } else { + /* regular object */ + RFALSE(tb->lbytes <= 0, + "PAP-12095: there is nothing to shift to L[0]. lbytes=%d", + tb->lbytes); + RFALSE(pos_in_item != + ih_item_len + (B_N_PITEM_HEAD + (tbS0, item_pos)), + "PAP-12100: incorrect position to paste: item_len=%d, pos_in_item=%d", + ih_item_len + (B_N_PITEM_HEAD + (tbS0, item_pos)), + pos_in_item); + + if (tb->lbytes >= pos_in_item) { + /* appended item will be in L[0] in whole */ + int l_n; + + /* this bytes number must be appended to the last item of L[h] */ + l_n = + tb->lbytes - + pos_in_item; + + /* Calculate new insert_size[0] */ + tb->insert_size[0] -= + l_n; + + RFALSE(tb-> + insert_size[0] <= + 0, + "PAP-12105: there is nothing to paste into L[0]. insert_size=%d", + tb-> + insert_size[0]); + ret_val = + leaf_shift_left(tb, + tb-> + lnum + [0], + ih_item_len + (B_N_PITEM_HEAD + (tbS0, + item_pos))); + /* Append to body of item in L[0] */ + bi.tb = tb; + bi.bi_bh = tb->L[0]; + bi.bi_parent = + tb->FL[0]; + bi.bi_position = + get_left_neighbor_position + (tb, 0); + leaf_paste_in_buffer + (&bi, + n + item_pos - + ret_val, + ih_item_len + (B_N_PITEM_HEAD + (tb->L[0], + n + item_pos - + ret_val)), l_n, + body, + zeros_num > + l_n ? l_n : + zeros_num); + /* 0-th item in S0 can be only of DIRECT type when l_n != 0 */ + { + int version; + int temp_l = + l_n; + + RFALSE + (ih_item_len + (B_N_PITEM_HEAD + (tbS0, + 0)), + "PAP-12106: item length must be 0"); + RFALSE + (comp_short_le_keys + (B_N_PKEY + (tbS0, 0), + B_N_PKEY + (tb->L[0], + n + + item_pos + - + ret_val)), + "PAP-12107: items must be of the same file"); + if (is_indirect_le_ih(B_N_PITEM_HEAD(tb->L[0], n + item_pos - ret_val))) { + temp_l = + l_n + << + (tb-> + tb_sb-> + s_blocksize_bits + - + UNFM_P_SHIFT); + } + /* update key of first item in S0 */ + version = + ih_version + (B_N_PITEM_HEAD + (tbS0, 0)); + set_le_key_k_offset + (version, + B_N_PKEY + (tbS0, 0), + le_key_k_offset + (version, + B_N_PKEY + (tbS0, + 0)) + + temp_l); + /* update left delimiting key */ + set_le_key_k_offset + (version, + B_N_PDELIM_KEY + (tb-> + CFL[0], + tb-> + lkey[0]), + le_key_k_offset + (version, + B_N_PDELIM_KEY + (tb-> + CFL[0], + tb-> + lkey[0])) + + temp_l); + } + + /* Calculate new body, position in item and insert_size[0] */ + if (l_n > zeros_num) { + body += + (l_n - + zeros_num); + zeros_num = 0; + } else + zeros_num -= + l_n; + pos_in_item = 0; + + RFALSE + (comp_short_le_keys + (B_N_PKEY(tbS0, 0), + B_N_PKEY(tb->L[0], + B_NR_ITEMS + (tb-> + L[0]) - + 1)) + || + !op_is_left_mergeable + (B_N_PKEY(tbS0, 0), + tbS0->b_size) + || + !op_is_left_mergeable + (B_N_PDELIM_KEY + (tb->CFL[0], + tb->lkey[0]), + tbS0->b_size), + "PAP-12120: item must be merge-able with left neighboring item"); + } else { /* only part of the appended item will be in L[0] */ + + /* Calculate position in item for append in S[0] */ + pos_in_item -= + tb->lbytes; + + RFALSE(pos_in_item <= 0, + "PAP-12125: no place for paste. pos_in_item=%d", + pos_in_item); + + /* Shift lnum[0] - 1 items in whole. Shift lbytes - 1 byte from item number lnum[0] */ + leaf_shift_left(tb, + tb-> + lnum[0], + tb-> + lbytes); + } + } + } else { /* appended item will be in L[0] in whole */ + + struct item_head *pasted; + + if (!item_pos && op_is_left_mergeable(B_N_PKEY(tbS0, 0), tbS0->b_size)) { /* if we paste into first item of S[0] and it is left mergable */ + /* then increment pos_in_item by the size of the last item in L[0] */ + pasted = + B_N_PITEM_HEAD(tb->L[0], + n - 1); + if (is_direntry_le_ih(pasted)) + pos_in_item += + ih_entry_count + (pasted); + else + pos_in_item += + ih_item_len(pasted); + } + + /* Shift lnum[0] - 1 items in whole. Shift lbytes - 1 byte from item number lnum[0] */ + ret_val = + leaf_shift_left(tb, tb->lnum[0], + tb->lbytes); + /* Append to body of item in L[0] */ + bi.tb = tb; + bi.bi_bh = tb->L[0]; + bi.bi_parent = tb->FL[0]; + bi.bi_position = + get_left_neighbor_position(tb, 0); + leaf_paste_in_buffer(&bi, + n + item_pos - + ret_val, + pos_in_item, + tb->insert_size[0], + body, zeros_num); + + /* if appended item is directory, paste entry */ + pasted = + B_N_PITEM_HEAD(tb->L[0], + n + item_pos - + ret_val); + if (is_direntry_le_ih(pasted)) + leaf_paste_entries(bi.bi_bh, + n + + item_pos - + ret_val, + pos_in_item, + 1, + (struct + reiserfs_de_head + *)body, + body + + DEH_SIZE, + tb-> + insert_size + [0] + ); + /* if appended item is indirect item, put unformatted node into un list */ + if (is_indirect_le_ih(pasted)) + set_ih_free_space(pasted, 0); + tb->insert_size[0] = 0; + zeros_num = 0; + } + break; + default: /* cases d and t */ + reiserfs_panic(tb->tb_sb, + "PAP-12130: balance_leaf: lnum > 0: unexpectable mode: %s(%d)", + (flag == + M_DELETE) ? "DELETE" : ((flag == + M_CUT) + ? "CUT" + : + "UNKNOWN"), + flag); } - - /* Shift lnum[0] - 1 items in whole. Shift lbytes - 1 byte from item number lnum[0] */ - ret_val = leaf_shift_left(tb,tb->lnum[0],tb->lbytes); - /* Append to body of item in L[0] */ - bi.tb = tb; - bi.bi_bh = tb->L[0]; - bi.bi_parent = tb->FL[0]; - bi.bi_position = get_left_neighbor_position (tb, 0); - leaf_paste_in_buffer (&bi, n + item_pos - ret_val, pos_in_item, tb->insert_size[0], - body, zeros_num); - - /* if appended item is directory, paste entry */ - pasted = B_N_PITEM_HEAD (tb->L[0], n + item_pos - ret_val); - if (is_direntry_le_ih (pasted)) - leaf_paste_entries ( - bi.bi_bh, n + item_pos - ret_val, pos_in_item, 1, - (struct reiserfs_de_head *)body, body + DEH_SIZE, tb->insert_size[0] - ); - /* if appended item is indirect item, put unformatted node into un list */ - if (is_indirect_le_ih (pasted)) - set_ih_free_space (pasted, 0); - tb->insert_size[0] = 0; - zeros_num = 0; + } else { + /* new item doesn't fall into L[0] */ + leaf_shift_left(tb, tb->lnum[0], tb->lbytes); } - break; - default: /* cases d and t */ - reiserfs_panic (tb->tb_sb, "PAP-12130: balance_leaf: lnum > 0: unexpectable mode: %s(%d)", - (flag == M_DELETE) ? "DELETE" : ((flag == M_CUT) ? "CUT" : "UNKNOWN"), flag); - } - } else { - /* new item doesn't fall into L[0] */ - leaf_shift_left(tb,tb->lnum[0],tb->lbytes); } - } /* tb->lnum[0] > 0 */ - /* Calculate new item position */ - item_pos -= ( tb->lnum[0] - (( tb->lbytes != -1 ) ? 1 : 0)); - - if ( tb->rnum[0] > 0 ) { - /* shift rnum[0] items from S[0] to the right neighbor R[0] */ - n = B_NR_ITEMS(tbS0); - switch ( flag ) { - - case M_INSERT: /* insert item */ - if ( n - tb->rnum[0] < item_pos ) - { /* new item or its part falls to R[0] */ - if ( item_pos == n - tb->rnum[0] + 1 && tb->rbytes != -1 ) - { /* part of new item falls into R[0] */ - loff_t old_key_comp, old_len, r_zeros_number; - const char * r_body; - int version; - loff_t offset; - - leaf_shift_right(tb,tb->rnum[0]-1,-1); - - version = ih_version(ih); - /* Remember key component and item length */ - old_key_comp = le_ih_k_offset( ih ); - old_len = ih_item_len(ih); - - /* Calculate key component and item length to insert into R[0] */ - offset = le_ih_k_offset( ih ) + ((old_len - tb->rbytes )<<(is_indirect_le_ih(ih)?tb->tb_sb->s_blocksize_bits - UNFM_P_SHIFT:0)); - set_le_ih_k_offset( ih, offset ); - put_ih_item_len( ih, tb->rbytes); - /* Insert part of the item into R[0] */ - bi.tb = tb; - bi.bi_bh = tb->R[0]; - bi.bi_parent = tb->FR[0]; - bi.bi_position = get_right_neighbor_position (tb, 0); - if ( (old_len - tb->rbytes) > zeros_num ) { - r_zeros_number = 0; - r_body = body + (old_len - tb->rbytes) - zeros_num; - } - else { - r_body = body; - r_zeros_number = zeros_num - (old_len - tb->rbytes); - zeros_num -= r_zeros_number; - } - - leaf_insert_into_buf (&bi, 0, ih, r_body, r_zeros_number); - - /* Replace right delimiting key by first key in R[0] */ - replace_key(tb, tb->CFR[0],tb->rkey[0],tb->R[0],0); - - /* Calculate key component and item length to insert into S[0] */ - set_le_ih_k_offset( ih, old_key_comp ); - put_ih_item_len( ih, old_len - tb->rbytes ); - - tb->insert_size[0] -= tb->rbytes; + /* tb->lnum[0] > 0 */ + /* Calculate new item position */ + item_pos -= (tb->lnum[0] - ((tb->lbytes != -1) ? 1 : 0)); + + if (tb->rnum[0] > 0) { + /* shift rnum[0] items from S[0] to the right neighbor R[0] */ + n = B_NR_ITEMS(tbS0); + switch (flag) { + + case M_INSERT: /* insert item */ + if (n - tb->rnum[0] < item_pos) { /* new item or its part falls to R[0] */ + if (item_pos == n - tb->rnum[0] + 1 && tb->rbytes != -1) { /* part of new item falls into R[0] */ + loff_t old_key_comp, old_len, + r_zeros_number; + const char *r_body; + int version; + loff_t offset; + + leaf_shift_right(tb, tb->rnum[0] - 1, + -1); + + version = ih_version(ih); + /* Remember key component and item length */ + old_key_comp = le_ih_k_offset(ih); + old_len = ih_item_len(ih); + + /* Calculate key component and item length to insert into R[0] */ + offset = + le_ih_k_offset(ih) + + ((old_len - + tb-> + rbytes) << (is_indirect_le_ih(ih) + ? tb->tb_sb-> + s_blocksize_bits - + UNFM_P_SHIFT : 0)); + set_le_ih_k_offset(ih, offset); + put_ih_item_len(ih, tb->rbytes); + /* Insert part of the item into R[0] */ + bi.tb = tb; + bi.bi_bh = tb->R[0]; + bi.bi_parent = tb->FR[0]; + bi.bi_position = + get_right_neighbor_position(tb, 0); + if ((old_len - tb->rbytes) > zeros_num) { + r_zeros_number = 0; + r_body = + body + (old_len - + tb->rbytes) - + zeros_num; + } else { + r_body = body; + r_zeros_number = + zeros_num - (old_len - + tb->rbytes); + zeros_num -= r_zeros_number; + } + + leaf_insert_into_buf(&bi, 0, ih, r_body, + r_zeros_number); + + /* Replace right delimiting key by first key in R[0] */ + replace_key(tb, tb->CFR[0], tb->rkey[0], + tb->R[0], 0); + + /* Calculate key component and item length to insert into S[0] */ + set_le_ih_k_offset(ih, old_key_comp); + put_ih_item_len(ih, + old_len - tb->rbytes); + + tb->insert_size[0] -= tb->rbytes; + + } else { /* whole new item falls into R[0] */ + + /* Shift rnum[0]-1 items to R[0] */ + ret_val = + leaf_shift_right(tb, + tb->rnum[0] - 1, + tb->rbytes); + /* Insert new item into R[0] */ + bi.tb = tb; + bi.bi_bh = tb->R[0]; + bi.bi_parent = tb->FR[0]; + bi.bi_position = + get_right_neighbor_position(tb, 0); + leaf_insert_into_buf(&bi, + item_pos - n + + tb->rnum[0] - 1, + ih, body, + zeros_num); + + if (item_pos - n + tb->rnum[0] - 1 == 0) { + replace_key(tb, tb->CFR[0], + tb->rkey[0], + tb->R[0], 0); + + } + zeros_num = tb->insert_size[0] = 0; + } + } else { /* new item or part of it doesn't fall into R[0] */ - } - else /* whole new item falls into R[0] */ - { - /* Shift rnum[0]-1 items to R[0] */ - ret_val = leaf_shift_right(tb,tb->rnum[0]-1,tb->rbytes); - /* Insert new item into R[0] */ - bi.tb = tb; - bi.bi_bh = tb->R[0]; - bi.bi_parent = tb->FR[0]; - bi.bi_position = get_right_neighbor_position (tb, 0); - leaf_insert_into_buf (&bi, item_pos - n + tb->rnum[0] - 1, ih, body, zeros_num); - - if ( item_pos - n + tb->rnum[0] - 1 == 0 ) { - replace_key(tb, tb->CFR[0],tb->rkey[0],tb->R[0],0); - - } - zeros_num = tb->insert_size[0] = 0; - } - } - else /* new item or part of it doesn't fall into R[0] */ - { - leaf_shift_right(tb,tb->rnum[0],tb->rbytes); - } - break; - - case M_PASTE: /* append item */ - - if ( n - tb->rnum[0] <= item_pos ) /* pasted item or part of it falls to R[0] */ - { - if ( item_pos == n - tb->rnum[0] && tb->rbytes != -1 ) - { /* we must shift the part of the appended item */ - if ( is_direntry_le_ih (B_N_PITEM_HEAD(tbS0, item_pos))) - { /* we append to directory item */ - int entry_count; - - RFALSE( zeros_num, - "PAP-12145: invalid parameter in case of a directory"); - entry_count = I_ENTRY_COUNT(B_N_PITEM_HEAD(tbS0, item_pos)); - if ( entry_count - tb->rbytes < pos_in_item ) - /* new directory entry falls into R[0] */ - { - int paste_entry_position; - - RFALSE( tb->rbytes - 1 >= entry_count || - ! tb->insert_size[0], - "PAP-12150: no enough of entries to shift to R[0]: rbytes=%d, entry_count=%d", - tb->rbytes, entry_count); - /* Shift rnum[0]-1 items in whole. Shift rbytes-1 directory entries from directory item number rnum[0] */ - leaf_shift_right(tb,tb->rnum[0],tb->rbytes - 1); - /* Paste given directory entry to directory item */ - paste_entry_position = pos_in_item - entry_count + tb->rbytes - 1; - bi.tb = tb; - bi.bi_bh = tb->R[0]; - bi.bi_parent = tb->FR[0]; - bi.bi_position = get_right_neighbor_position (tb, 0); - leaf_paste_in_buffer (&bi, 0, paste_entry_position, - tb->insert_size[0],body,zeros_num); - /* paste entry */ - leaf_paste_entries ( - bi.bi_bh, 0, paste_entry_position, 1, (struct reiserfs_de_head *)body, - body + DEH_SIZE, tb->insert_size[0] - ); - - if ( paste_entry_position == 0 ) { - /* change delimiting keys */ - replace_key(tb, tb->CFR[0],tb->rkey[0],tb->R[0],0); - } - - tb->insert_size[0] = 0; - pos_in_item++; - } - else /* new directory entry doesn't fall into R[0] */ - { - leaf_shift_right(tb,tb->rnum[0],tb->rbytes); - } - } - else /* regular object */ - { - int n_shift, n_rem, r_zeros_number; - const char * r_body; - - /* Calculate number of bytes which must be shifted from appended item */ - if ( (n_shift = tb->rbytes - tb->insert_size[0]) < 0 ) - n_shift = 0; - - RFALSE(pos_in_item != ih_item_len(B_N_PITEM_HEAD (tbS0, item_pos)), - "PAP-12155: invalid position to paste. ih_item_len=%d, pos_in_item=%d", - pos_in_item, ih_item_len( B_N_PITEM_HEAD(tbS0,item_pos))); - - leaf_shift_right(tb,tb->rnum[0],n_shift); - /* Calculate number of bytes which must remain in body after appending to R[0] */ - if ( (n_rem = tb->insert_size[0] - tb->rbytes) < 0 ) - n_rem = 0; - - { - int version; - unsigned long temp_rem = n_rem; - - version = ih_version (B_N_PITEM_HEAD (tb->R[0],0)); - if (is_indirect_le_key(version,B_N_PKEY(tb->R[0],0))){ - temp_rem = n_rem << (tb->tb_sb->s_blocksize_bits - - UNFM_P_SHIFT); - } - set_le_key_k_offset (version, B_N_PKEY(tb->R[0],0), - le_key_k_offset (version, B_N_PKEY(tb->R[0],0)) + temp_rem); - set_le_key_k_offset (version, B_N_PDELIM_KEY(tb->CFR[0],tb->rkey[0]), - le_key_k_offset (version, B_N_PDELIM_KEY(tb->CFR[0],tb->rkey[0])) + temp_rem); + leaf_shift_right(tb, tb->rnum[0], tb->rbytes); } + break; + + case M_PASTE: /* append item */ + + if (n - tb->rnum[0] <= item_pos) { /* pasted item or part of it falls to R[0] */ + if (item_pos == n - tb->rnum[0] && tb->rbytes != -1) { /* we must shift the part of the appended item */ + if (is_direntry_le_ih(B_N_PITEM_HEAD(tbS0, item_pos))) { /* we append to directory item */ + int entry_count; + + RFALSE(zeros_num, + "PAP-12145: invalid parameter in case of a directory"); + entry_count = + I_ENTRY_COUNT(B_N_PITEM_HEAD + (tbS0, + item_pos)); + if (entry_count - tb->rbytes < + pos_in_item) + /* new directory entry falls into R[0] */ + { + int paste_entry_position; + + RFALSE(tb->rbytes - 1 >= + entry_count + || !tb-> + insert_size[0], + "PAP-12150: no enough of entries to shift to R[0]: rbytes=%d, entry_count=%d", + tb->rbytes, + entry_count); + /* Shift rnum[0]-1 items in whole. Shift rbytes-1 directory entries from directory item number rnum[0] */ + leaf_shift_right(tb, + tb-> + rnum + [0], + tb-> + rbytes + - 1); + /* Paste given directory entry to directory item */ + paste_entry_position = + pos_in_item - + entry_count + + tb->rbytes - 1; + bi.tb = tb; + bi.bi_bh = tb->R[0]; + bi.bi_parent = + tb->FR[0]; + bi.bi_position = + get_right_neighbor_position + (tb, 0); + leaf_paste_in_buffer + (&bi, 0, + paste_entry_position, + tb->insert_size[0], + body, zeros_num); + /* paste entry */ + leaf_paste_entries(bi. + bi_bh, + 0, + paste_entry_position, + 1, + (struct + reiserfs_de_head + *) + body, + body + + + DEH_SIZE, + tb-> + insert_size + [0] + ); + + if (paste_entry_position + == 0) { + /* change delimiting keys */ + replace_key(tb, + tb-> + CFR + [0], + tb-> + rkey + [0], + tb-> + R + [0], + 0); + } + + tb->insert_size[0] = 0; + pos_in_item++; + } else { /* new directory entry doesn't fall into R[0] */ + + leaf_shift_right(tb, + tb-> + rnum + [0], + tb-> + rbytes); + } + } else { /* regular object */ + + int n_shift, n_rem, + r_zeros_number; + const char *r_body; + + /* Calculate number of bytes which must be shifted from appended item */ + if ((n_shift = + tb->rbytes - + tb->insert_size[0]) < 0) + n_shift = 0; + + RFALSE(pos_in_item != + ih_item_len + (B_N_PITEM_HEAD + (tbS0, item_pos)), + "PAP-12155: invalid position to paste. ih_item_len=%d, pos_in_item=%d", + pos_in_item, + ih_item_len + (B_N_PITEM_HEAD + (tbS0, item_pos))); + + leaf_shift_right(tb, + tb->rnum[0], + n_shift); + /* Calculate number of bytes which must remain in body after appending to R[0] */ + if ((n_rem = + tb->insert_size[0] - + tb->rbytes) < 0) + n_rem = 0; + + { + int version; + unsigned long temp_rem = + n_rem; + + version = + ih_version + (B_N_PITEM_HEAD + (tb->R[0], 0)); + if (is_indirect_le_key + (version, + B_N_PKEY(tb->R[0], + 0))) { + temp_rem = + n_rem << + (tb->tb_sb-> + s_blocksize_bits + - + UNFM_P_SHIFT); + } + set_le_key_k_offset + (version, + B_N_PKEY(tb->R[0], + 0), + le_key_k_offset + (version, + B_N_PKEY(tb->R[0], + 0)) + + temp_rem); + set_le_key_k_offset + (version, + B_N_PDELIM_KEY(tb-> + CFR + [0], + tb-> + rkey + [0]), + le_key_k_offset + (version, + B_N_PDELIM_KEY + (tb->CFR[0], + tb->rkey[0])) + + temp_rem); + } /* k_offset (B_N_PKEY(tb->R[0],0)) += n_rem; k_offset (B_N_PDELIM_KEY(tb->CFR[0],tb->rkey[0])) += n_rem;*/ - do_balance_mark_internal_dirty (tb, tb->CFR[0], 0); - - /* Append part of body into R[0] */ - bi.tb = tb; - bi.bi_bh = tb->R[0]; - bi.bi_parent = tb->FR[0]; - bi.bi_position = get_right_neighbor_position (tb, 0); - if ( n_rem > zeros_num ) { - r_zeros_number = 0; - r_body = body + n_rem - zeros_num; - } - else { - r_body = body; - r_zeros_number = zeros_num - n_rem; - zeros_num -= r_zeros_number; - } - - leaf_paste_in_buffer(&bi, 0, n_shift, tb->insert_size[0] - n_rem, r_body, r_zeros_number); - - if (is_indirect_le_ih (B_N_PITEM_HEAD(tb->R[0],0))) { + do_balance_mark_internal_dirty + (tb, tb->CFR[0], 0); + + /* Append part of body into R[0] */ + bi.tb = tb; + bi.bi_bh = tb->R[0]; + bi.bi_parent = tb->FR[0]; + bi.bi_position = + get_right_neighbor_position + (tb, 0); + if (n_rem > zeros_num) { + r_zeros_number = 0; + r_body = + body + n_rem - + zeros_num; + } else { + r_body = body; + r_zeros_number = + zeros_num - n_rem; + zeros_num -= + r_zeros_number; + } + + leaf_paste_in_buffer(&bi, 0, + n_shift, + tb-> + insert_size + [0] - + n_rem, + r_body, + r_zeros_number); + + if (is_indirect_le_ih + (B_N_PITEM_HEAD + (tb->R[0], 0))) { #if 0 - RFALSE( n_rem, - "PAP-12160: paste more than one unformatted node pointer"); + RFALSE(n_rem, + "PAP-12160: paste more than one unformatted node pointer"); #endif - set_ih_free_space (B_N_PITEM_HEAD(tb->R[0],0), 0); - } - tb->insert_size[0] = n_rem; - if ( ! n_rem ) - pos_in_item ++; - } - } - else /* pasted item in whole falls into R[0] */ - { - struct item_head * pasted; + set_ih_free_space + (B_N_PITEM_HEAD + (tb->R[0], 0), 0); + } + tb->insert_size[0] = n_rem; + if (!n_rem) + pos_in_item++; + } + } else { /* pasted item in whole falls into R[0] */ + + struct item_head *pasted; + + ret_val = + leaf_shift_right(tb, tb->rnum[0], + tb->rbytes); + /* append item in R[0] */ + if (pos_in_item >= 0) { + bi.tb = tb; + bi.bi_bh = tb->R[0]; + bi.bi_parent = tb->FR[0]; + bi.bi_position = + get_right_neighbor_position + (tb, 0); + leaf_paste_in_buffer(&bi, + item_pos - + n + + tb-> + rnum[0], + pos_in_item, + tb-> + insert_size + [0], body, + zeros_num); + } + + /* paste new entry, if item is directory item */ + pasted = + B_N_PITEM_HEAD(tb->R[0], + item_pos - n + + tb->rnum[0]); + if (is_direntry_le_ih(pasted) + && pos_in_item >= 0) { + leaf_paste_entries(bi.bi_bh, + item_pos - + n + + tb->rnum[0], + pos_in_item, + 1, + (struct + reiserfs_de_head + *)body, + body + + DEH_SIZE, + tb-> + insert_size + [0] + ); + if (!pos_in_item) { + + RFALSE(item_pos - n + + tb->rnum[0], + "PAP-12165: directory item must be first item of node when pasting is in 0th position"); + + /* update delimiting keys */ + replace_key(tb, + tb->CFR[0], + tb->rkey[0], + tb->R[0], + 0); + } + } + + if (is_indirect_le_ih(pasted)) + set_ih_free_space(pasted, 0); + zeros_num = tb->insert_size[0] = 0; + } + } else { /* new item doesn't fall into R[0] */ - ret_val = leaf_shift_right(tb,tb->rnum[0],tb->rbytes); - /* append item in R[0] */ - if ( pos_in_item >= 0 ) { - bi.tb = tb; - bi.bi_bh = tb->R[0]; - bi.bi_parent = tb->FR[0]; - bi.bi_position = get_right_neighbor_position (tb, 0); - leaf_paste_in_buffer(&bi,item_pos - n + tb->rnum[0], pos_in_item, - tb->insert_size[0],body, zeros_num); - } - - /* paste new entry, if item is directory item */ - pasted = B_N_PITEM_HEAD(tb->R[0], item_pos - n + tb->rnum[0]); - if (is_direntry_le_ih (pasted) && pos_in_item >= 0 ) { - leaf_paste_entries ( - bi.bi_bh, item_pos - n + tb->rnum[0], pos_in_item, 1, - (struct reiserfs_de_head *)body, body + DEH_SIZE, tb->insert_size[0] - ); - if ( ! pos_in_item ) { - - RFALSE( item_pos - n + tb->rnum[0], - "PAP-12165: directory item must be first item of node when pasting is in 0th position"); - - /* update delimiting keys */ - replace_key(tb, tb->CFR[0],tb->rkey[0],tb->R[0],0); + leaf_shift_right(tb, tb->rnum[0], tb->rbytes); } - } - - if (is_indirect_le_ih (pasted)) - set_ih_free_space (pasted, 0); - zeros_num = tb->insert_size[0] = 0; + break; + default: /* cases d and t */ + reiserfs_panic(tb->tb_sb, + "PAP-12175: balance_leaf: rnum > 0: unexpectable mode: %s(%d)", + (flag == + M_DELETE) ? "DELETE" : ((flag == + M_CUT) ? "CUT" + : "UNKNOWN"), + flag); } - } - else /* new item doesn't fall into R[0] */ - { - leaf_shift_right(tb,tb->rnum[0],tb->rbytes); - } - break; - default: /* cases d and t */ - reiserfs_panic (tb->tb_sb, "PAP-12175: balance_leaf: rnum > 0: unexpectable mode: %s(%d)", - (flag == M_DELETE) ? "DELETE" : ((flag == M_CUT) ? "CUT" : "UNKNOWN"), flag); - } - - } /* tb->rnum[0] > 0 */ - - - RFALSE( tb->blknum[0] > 3, - "PAP-12180: blknum can not be %d. It must be <= 3", tb->blknum[0]); - RFALSE( tb->blknum[0] < 0, - "PAP-12185: blknum can not be %d. It must be >= 0", tb->blknum[0]); - - /* if while adding to a node we discover that it is possible to split - it in two, and merge the left part into the left neighbor and the - right part into the right neighbor, eliminating the node */ - if ( tb->blknum[0] == 0 ) { /* node S[0] is empty now */ - - RFALSE( ! tb->lnum[0] || ! tb->rnum[0], - "PAP-12190: lnum and rnum must not be zero"); - /* if insertion was done before 0-th position in R[0], right - delimiting key of the tb->L[0]'s and left delimiting key are - not set correctly */ - if (tb->CFL[0]) { - if (!tb->CFR[0]) - reiserfs_panic (tb->tb_sb, "vs-12195: balance_leaf: CFR not initialized"); - copy_key (B_N_PDELIM_KEY (tb->CFL[0], tb->lkey[0]), B_N_PDELIM_KEY (tb->CFR[0], tb->rkey[0])); - do_balance_mark_internal_dirty (tb, tb->CFL[0], 0); - } - - reiserfs_invalidate_buffer(tb,tbS0); - return 0; - } - - - /* Fill new nodes that appear in place of S[0] */ - /* I am told that this copying is because we need an array to enable - the looping code. -Hans */ - snum[0] = tb->s1num, - snum[1] = tb->s2num; - sbytes[0] = tb->s1bytes; - sbytes[1] = tb->s2bytes; - for( i = tb->blknum[0] - 2; i >= 0; i-- ) { - - RFALSE( !snum[i], "PAP-12200: snum[%d] == %d. Must be > 0", i, snum[i]); + } - /* here we shift from S to S_new nodes */ + /* tb->rnum[0] > 0 */ + RFALSE(tb->blknum[0] > 3, + "PAP-12180: blknum can not be %d. It must be <= 3", + tb->blknum[0]); + RFALSE(tb->blknum[0] < 0, + "PAP-12185: blknum can not be %d. It must be >= 0", + tb->blknum[0]); + + /* if while adding to a node we discover that it is possible to split + it in two, and merge the left part into the left neighbor and the + right part into the right neighbor, eliminating the node */ + if (tb->blknum[0] == 0) { /* node S[0] is empty now */ + + RFALSE(!tb->lnum[0] || !tb->rnum[0], + "PAP-12190: lnum and rnum must not be zero"); + /* if insertion was done before 0-th position in R[0], right + delimiting key of the tb->L[0]'s and left delimiting key are + not set correctly */ + if (tb->CFL[0]) { + if (!tb->CFR[0]) + reiserfs_panic(tb->tb_sb, + "vs-12195: balance_leaf: CFR not initialized"); + copy_key(B_N_PDELIM_KEY(tb->CFL[0], tb->lkey[0]), + B_N_PDELIM_KEY(tb->CFR[0], tb->rkey[0])); + do_balance_mark_internal_dirty(tb, tb->CFL[0], 0); + } - S_new[i] = get_FEB(tb); + reiserfs_invalidate_buffer(tb, tbS0); + return 0; + } - /* initialized block type and tree level */ - set_blkh_level( B_BLK_HEAD(S_new[i]), DISK_LEAF_NODE_LEVEL ); + /* Fill new nodes that appear in place of S[0] */ + + /* I am told that this copying is because we need an array to enable + the looping code. -Hans */ + snum[0] = tb->s1num, snum[1] = tb->s2num; + sbytes[0] = tb->s1bytes; + sbytes[1] = tb->s2bytes; + for (i = tb->blknum[0] - 2; i >= 0; i--) { + + RFALSE(!snum[i], "PAP-12200: snum[%d] == %d. Must be > 0", i, + snum[i]); + + /* here we shift from S to S_new nodes */ + + S_new[i] = get_FEB(tb); + + /* initialized block type and tree level */ + set_blkh_level(B_BLK_HEAD(S_new[i]), DISK_LEAF_NODE_LEVEL); + + n = B_NR_ITEMS(tbS0); + + switch (flag) { + case M_INSERT: /* insert item */ + + if (n - snum[i] < item_pos) { /* new item or it's part falls to first new node S_new[i] */ + if (item_pos == n - snum[i] + 1 && sbytes[i] != -1) { /* part of new item falls into S_new[i] */ + int old_key_comp, old_len, + r_zeros_number; + const char *r_body; + int version; + + /* Move snum[i]-1 items from S[0] to S_new[i] */ + leaf_move_items(LEAF_FROM_S_TO_SNEW, tb, + snum[i] - 1, -1, + S_new[i]); + /* Remember key component and item length */ + version = ih_version(ih); + old_key_comp = le_ih_k_offset(ih); + old_len = ih_item_len(ih); + + /* Calculate key component and item length to insert into S_new[i] */ + set_le_ih_k_offset(ih, + le_ih_k_offset(ih) + + ((old_len - + sbytes[i]) << + (is_indirect_le_ih + (ih) ? tb->tb_sb-> + s_blocksize_bits - + UNFM_P_SHIFT : + 0))); + + put_ih_item_len(ih, sbytes[i]); + + /* Insert part of the item into S_new[i] before 0-th item */ + bi.tb = tb; + bi.bi_bh = S_new[i]; + bi.bi_parent = NULL; + bi.bi_position = 0; + + if ((old_len - sbytes[i]) > zeros_num) { + r_zeros_number = 0; + r_body = + body + (old_len - + sbytes[i]) - + zeros_num; + } else { + r_body = body; + r_zeros_number = + zeros_num - (old_len - + sbytes[i]); + zeros_num -= r_zeros_number; + } + + leaf_insert_into_buf(&bi, 0, ih, r_body, + r_zeros_number); + + /* Calculate key component and item length to insert into S[i] */ + set_le_ih_k_offset(ih, old_key_comp); + put_ih_item_len(ih, + old_len - sbytes[i]); + tb->insert_size[0] -= sbytes[i]; + } else { /* whole new item falls into S_new[i] */ + + /* Shift snum[0] - 1 items to S_new[i] (sbytes[i] of split item) */ + leaf_move_items(LEAF_FROM_S_TO_SNEW, tb, + snum[i] - 1, sbytes[i], + S_new[i]); + + /* Insert new item into S_new[i] */ + bi.tb = tb; + bi.bi_bh = S_new[i]; + bi.bi_parent = NULL; + bi.bi_position = 0; + leaf_insert_into_buf(&bi, + item_pos - n + + snum[i] - 1, ih, + body, zeros_num); + + zeros_num = tb->insert_size[0] = 0; + } + } + else { /* new item or it part don't falls into S_new[i] */ - n = B_NR_ITEMS(tbS0); - - switch (flag) { - case M_INSERT: /* insert item */ - - if ( n - snum[i] < item_pos ) - { /* new item or it's part falls to first new node S_new[i]*/ - if ( item_pos == n - snum[i] + 1 && sbytes[i] != -1 ) - { /* part of new item falls into S_new[i] */ - int old_key_comp, old_len, r_zeros_number; - const char * r_body; - int version; - - /* Move snum[i]-1 items from S[0] to S_new[i] */ - leaf_move_items (LEAF_FROM_S_TO_SNEW, tb, snum[i] - 1, -1, S_new[i]); - /* Remember key component and item length */ - version = ih_version (ih); - old_key_comp = le_ih_k_offset( ih ); - old_len = ih_item_len(ih); - - /* Calculate key component and item length to insert into S_new[i] */ - set_le_ih_k_offset( ih, - le_ih_k_offset(ih) + ((old_len - sbytes[i] )<<(is_indirect_le_ih(ih)?tb->tb_sb->s_blocksize_bits - UNFM_P_SHIFT:0)) ); - - put_ih_item_len( ih, sbytes[i] ); - - /* Insert part of the item into S_new[i] before 0-th item */ - bi.tb = tb; - bi.bi_bh = S_new[i]; - bi.bi_parent = NULL; - bi.bi_position = 0; - - if ( (old_len - sbytes[i]) > zeros_num ) { - r_zeros_number = 0; - r_body = body + (old_len - sbytes[i]) - zeros_num; - } - else { - r_body = body; - r_zeros_number = zeros_num - (old_len - sbytes[i]); - zeros_num -= r_zeros_number; - } - - leaf_insert_into_buf (&bi, 0, ih, r_body, r_zeros_number); - - /* Calculate key component and item length to insert into S[i] */ - set_le_ih_k_offset( ih, old_key_comp ); - put_ih_item_len( ih, old_len - sbytes[i] ); - tb->insert_size[0] -= sbytes[i]; - } - else /* whole new item falls into S_new[i] */ - { - /* Shift snum[0] - 1 items to S_new[i] (sbytes[i] of split item) */ - leaf_move_items (LEAF_FROM_S_TO_SNEW, tb, snum[i] - 1, sbytes[i], S_new[i]); - - /* Insert new item into S_new[i] */ - bi.tb = tb; - bi.bi_bh = S_new[i]; - bi.bi_parent = NULL; - bi.bi_position = 0; - leaf_insert_into_buf (&bi, item_pos - n + snum[i] - 1, ih, body, zeros_num); - - zeros_num = tb->insert_size[0] = 0; - } - } - - else /* new item or it part don't falls into S_new[i] */ - { - leaf_move_items (LEAF_FROM_S_TO_SNEW, tb, snum[i], sbytes[i], S_new[i]); - } - break; - - case M_PASTE: /* append item */ - - if ( n - snum[i] <= item_pos ) /* pasted item or part if it falls to S_new[i] */ - { - if ( item_pos == n - snum[i] && sbytes[i] != -1 ) - { /* we must shift part of the appended item */ - struct item_head * aux_ih; - - RFALSE( ih, "PAP-12210: ih must be 0"); - - if ( is_direntry_le_ih (aux_ih = B_N_PITEM_HEAD(tbS0,item_pos))) { - /* we append to directory item */ - - int entry_count; - - entry_count = ih_entry_count(aux_ih); - - if ( entry_count - sbytes[i] < pos_in_item && pos_in_item <= entry_count ) { - /* new directory entry falls into S_new[i] */ - - RFALSE( ! tb->insert_size[0], - "PAP-12215: insert_size is already 0"); - RFALSE( sbytes[i] - 1 >= entry_count, - "PAP-12220: there are no so much entries (%d), only %d", - sbytes[i] - 1, entry_count); - - /* Shift snum[i]-1 items in whole. Shift sbytes[i] directory entries from directory item number snum[i] */ - leaf_move_items (LEAF_FROM_S_TO_SNEW, tb, snum[i], sbytes[i]-1, S_new[i]); - /* Paste given directory entry to directory item */ - bi.tb = tb; - bi.bi_bh = S_new[i]; - bi.bi_parent = NULL; - bi.bi_position = 0; - leaf_paste_in_buffer (&bi, 0, pos_in_item - entry_count + sbytes[i] - 1, - tb->insert_size[0], body,zeros_num); - /* paste new directory entry */ - leaf_paste_entries ( - bi.bi_bh, 0, pos_in_item - entry_count + sbytes[i] - 1, - 1, (struct reiserfs_de_head *)body, body + DEH_SIZE, - tb->insert_size[0] - ); - tb->insert_size[0] = 0; - pos_in_item++; - } else { /* new directory entry doesn't fall into S_new[i] */ - leaf_move_items (LEAF_FROM_S_TO_SNEW, tb, snum[i], sbytes[i], S_new[i]); + leaf_move_items(LEAF_FROM_S_TO_SNEW, tb, + snum[i], sbytes[i], S_new[i]); } - } - else /* regular object */ - { - int n_shift, n_rem, r_zeros_number; - const char * r_body; - - RFALSE( pos_in_item != ih_item_len(B_N_PITEM_HEAD(tbS0,item_pos)) || - tb->insert_size[0] <= 0, - "PAP-12225: item too short or insert_size <= 0"); - - /* Calculate number of bytes which must be shifted from appended item */ - n_shift = sbytes[i] - tb->insert_size[0]; - if ( n_shift < 0 ) - n_shift = 0; - leaf_move_items (LEAF_FROM_S_TO_SNEW, tb, snum[i], n_shift, S_new[i]); - - /* Calculate number of bytes which must remain in body after append to S_new[i] */ - n_rem = tb->insert_size[0] - sbytes[i]; - if ( n_rem < 0 ) - n_rem = 0; - /* Append part of body into S_new[0] */ - bi.tb = tb; - bi.bi_bh = S_new[i]; - bi.bi_parent = NULL; - bi.bi_position = 0; + break; + + case M_PASTE: /* append item */ + + if (n - snum[i] <= item_pos) { /* pasted item or part if it falls to S_new[i] */ + if (item_pos == n - snum[i] && sbytes[i] != -1) { /* we must shift part of the appended item */ + struct item_head *aux_ih; + + RFALSE(ih, "PAP-12210: ih must be 0"); + + if (is_direntry_le_ih + (aux_ih = + B_N_PITEM_HEAD(tbS0, item_pos))) { + /* we append to directory item */ + + int entry_count; + + entry_count = + ih_entry_count(aux_ih); + + if (entry_count - sbytes[i] < + pos_in_item + && pos_in_item <= + entry_count) { + /* new directory entry falls into S_new[i] */ + + RFALSE(!tb-> + insert_size[0], + "PAP-12215: insert_size is already 0"); + RFALSE(sbytes[i] - 1 >= + entry_count, + "PAP-12220: there are no so much entries (%d), only %d", + sbytes[i] - 1, + entry_count); + + /* Shift snum[i]-1 items in whole. Shift sbytes[i] directory entries from directory item number snum[i] */ + leaf_move_items + (LEAF_FROM_S_TO_SNEW, + tb, snum[i], + sbytes[i] - 1, + S_new[i]); + /* Paste given directory entry to directory item */ + bi.tb = tb; + bi.bi_bh = S_new[i]; + bi.bi_parent = NULL; + bi.bi_position = 0; + leaf_paste_in_buffer + (&bi, 0, + pos_in_item - + entry_count + + sbytes[i] - 1, + tb->insert_size[0], + body, zeros_num); + /* paste new directory entry */ + leaf_paste_entries(bi. + bi_bh, + 0, + pos_in_item + - + entry_count + + + sbytes + [i] - + 1, 1, + (struct + reiserfs_de_head + *) + body, + body + + + DEH_SIZE, + tb-> + insert_size + [0] + ); + tb->insert_size[0] = 0; + pos_in_item++; + } else { /* new directory entry doesn't fall into S_new[i] */ + leaf_move_items + (LEAF_FROM_S_TO_SNEW, + tb, snum[i], + sbytes[i], + S_new[i]); + } + } else { /* regular object */ + + int n_shift, n_rem, + r_zeros_number; + const char *r_body; + + RFALSE(pos_in_item != + ih_item_len + (B_N_PITEM_HEAD + (tbS0, item_pos)) + || tb->insert_size[0] <= + 0, + "PAP-12225: item too short or insert_size <= 0"); + + /* Calculate number of bytes which must be shifted from appended item */ + n_shift = + sbytes[i] - + tb->insert_size[0]; + if (n_shift < 0) + n_shift = 0; + leaf_move_items + (LEAF_FROM_S_TO_SNEW, tb, + snum[i], n_shift, + S_new[i]); + + /* Calculate number of bytes which must remain in body after append to S_new[i] */ + n_rem = + tb->insert_size[0] - + sbytes[i]; + if (n_rem < 0) + n_rem = 0; + /* Append part of body into S_new[0] */ + bi.tb = tb; + bi.bi_bh = S_new[i]; + bi.bi_parent = NULL; + bi.bi_position = 0; + + if (n_rem > zeros_num) { + r_zeros_number = 0; + r_body = + body + n_rem - + zeros_num; + } else { + r_body = body; + r_zeros_number = + zeros_num - n_rem; + zeros_num -= + r_zeros_number; + } + + leaf_paste_in_buffer(&bi, 0, + n_shift, + tb-> + insert_size + [0] - + n_rem, + r_body, + r_zeros_number); + { + struct item_head *tmp; + + tmp = + B_N_PITEM_HEAD(S_new + [i], + 0); + if (is_indirect_le_ih + (tmp)) { + set_ih_free_space + (tmp, 0); + set_le_ih_k_offset + (tmp, + le_ih_k_offset + (tmp) + + (n_rem << + (tb-> + tb_sb-> + s_blocksize_bits + - + UNFM_P_SHIFT))); + } else { + set_le_ih_k_offset + (tmp, + le_ih_k_offset + (tmp) + + n_rem); + } + } + + tb->insert_size[0] = n_rem; + if (!n_rem) + pos_in_item++; + } + } else + /* item falls wholly into S_new[i] */ + { + int ret_val; + struct item_head *pasted; - if ( n_rem > zeros_num ) { - r_zeros_number = 0; - r_body = body + n_rem - zeros_num; - } - else { - r_body = body; - r_zeros_number = zeros_num - n_rem; - zeros_num -= r_zeros_number; +#ifdef CONFIG_REISERFS_CHECK + struct item_head *ih = + B_N_PITEM_HEAD(tbS0, item_pos); + + if (!is_direntry_le_ih(ih) + && (pos_in_item != ih_item_len(ih) + || tb->insert_size[0] <= 0)) + reiserfs_panic(tb->tb_sb, + "PAP-12235: balance_leaf: pos_in_item must be equal to ih_item_len"); +#endif /* CONFIG_REISERFS_CHECK */ + + ret_val = + leaf_move_items(LEAF_FROM_S_TO_SNEW, + tb, snum[i], + sbytes[i], + S_new[i]); + + RFALSE(ret_val, + "PAP-12240: unexpected value returned by leaf_move_items (%d)", + ret_val); + + /* paste into item */ + bi.tb = tb; + bi.bi_bh = S_new[i]; + bi.bi_parent = NULL; + bi.bi_position = 0; + leaf_paste_in_buffer(&bi, + item_pos - n + + snum[i], + pos_in_item, + tb->insert_size[0], + body, zeros_num); + + pasted = + B_N_PITEM_HEAD(S_new[i], + item_pos - n + + snum[i]); + if (is_direntry_le_ih(pasted)) { + leaf_paste_entries(bi.bi_bh, + item_pos - + n + snum[i], + pos_in_item, + 1, + (struct + reiserfs_de_head + *)body, + body + + DEH_SIZE, + tb-> + insert_size + [0] + ); + } + + /* if we paste to indirect item update ih_free_space */ + if (is_indirect_le_ih(pasted)) + set_ih_free_space(pasted, 0); + zeros_num = tb->insert_size[0] = 0; + } } - leaf_paste_in_buffer(&bi, 0, n_shift, tb->insert_size[0]-n_rem, r_body,r_zeros_number); - { - struct item_head * tmp; - - tmp = B_N_PITEM_HEAD(S_new[i],0); - if (is_indirect_le_ih (tmp)) { - set_ih_free_space (tmp, 0); - set_le_ih_k_offset( tmp, le_ih_k_offset(tmp) + - (n_rem << (tb->tb_sb->s_blocksize_bits - UNFM_P_SHIFT))); - } else { - set_le_ih_k_offset( tmp, le_ih_k_offset(tmp) + - n_rem ); - } - } + else { /* pasted item doesn't fall into S_new[i] */ - tb->insert_size[0] = n_rem; - if ( ! n_rem ) - pos_in_item++; - } + leaf_move_items(LEAF_FROM_S_TO_SNEW, tb, + snum[i], sbytes[i], S_new[i]); + } + break; + default: /* cases d and t */ + reiserfs_panic(tb->tb_sb, + "PAP-12245: balance_leaf: blknum > 2: unexpectable mode: %s(%d)", + (flag == + M_DELETE) ? "DELETE" : ((flag == + M_CUT) ? "CUT" + : "UNKNOWN"), + flag); } - else - /* item falls wholly into S_new[i] */ - { - int ret_val; - struct item_head * pasted; -#ifdef CONFIG_REISERFS_CHECK - struct item_head * ih = B_N_PITEM_HEAD(tbS0,item_pos); - - if ( ! is_direntry_le_ih(ih) && (pos_in_item != ih_item_len(ih) || - tb->insert_size[0] <= 0) ) - reiserfs_panic (tb->tb_sb, "PAP-12235: balance_leaf: pos_in_item must be equal to ih_item_len"); -#endif /* CONFIG_REISERFS_CHECK */ - - ret_val = leaf_move_items (LEAF_FROM_S_TO_SNEW, tb, snum[i], sbytes[i], S_new[i]); - - RFALSE( ret_val, - "PAP-12240: unexpected value returned by leaf_move_items (%d)", - ret_val); - - /* paste into item */ - bi.tb = tb; - bi.bi_bh = S_new[i]; - bi.bi_parent = NULL; - bi.bi_position = 0; - leaf_paste_in_buffer(&bi, item_pos - n + snum[i], pos_in_item, tb->insert_size[0], body, zeros_num); - - pasted = B_N_PITEM_HEAD(S_new[i], item_pos - n + snum[i]); - if (is_direntry_le_ih (pasted)) - { - leaf_paste_entries ( - bi.bi_bh, item_pos - n + snum[i], pos_in_item, 1, - (struct reiserfs_de_head *)body, body + DEH_SIZE, tb->insert_size[0] - ); - } - - /* if we paste to indirect item update ih_free_space */ - if (is_indirect_le_ih (pasted)) - set_ih_free_space (pasted, 0); - zeros_num = tb->insert_size[0] = 0; - } - } - - else /* pasted item doesn't fall into S_new[i] */ - { - leaf_move_items (LEAF_FROM_S_TO_SNEW, tb, snum[i], sbytes[i], S_new[i]); - } - break; - default: /* cases d and t */ - reiserfs_panic (tb->tb_sb, "PAP-12245: balance_leaf: blknum > 2: unexpectable mode: %s(%d)", - (flag == M_DELETE) ? "DELETE" : ((flag == M_CUT) ? "CUT" : "UNKNOWN"), flag); + memcpy(insert_key + i, B_N_PKEY(S_new[i], 0), KEY_SIZE); + insert_ptr[i] = S_new[i]; + + RFALSE(!buffer_journaled(S_new[i]) + || buffer_journal_dirty(S_new[i]) + || buffer_dirty(S_new[i]), "PAP-12247: S_new[%d] : (%b)", + i, S_new[i]); } - memcpy (insert_key + i,B_N_PKEY(S_new[i],0),KEY_SIZE); - insert_ptr[i] = S_new[i]; - - RFALSE (!buffer_journaled (S_new [i]) || buffer_journal_dirty (S_new [i]) || - buffer_dirty (S_new [i]), - "PAP-12247: S_new[%d] : (%b)", i, S_new[i]); - } - - /* if the affected item was not wholly shifted then we perform all necessary operations on that part or whole of the - affected item which remains in S */ - if ( 0 <= item_pos && item_pos < tb->s0num ) - { /* if we must insert or append into buffer S[0] */ - - switch (flag) - { - case M_INSERT: /* insert item into S[0] */ - bi.tb = tb; - bi.bi_bh = tbS0; - bi.bi_parent = PATH_H_PPARENT (tb->tb_path, 0); - bi.bi_position = PATH_H_POSITION (tb->tb_path, 1); - leaf_insert_into_buf (&bi, item_pos, ih, body, zeros_num); - - /* If we insert the first key change the delimiting key */ - if( item_pos == 0 ) { - if (tb->CFL[0]) /* can be 0 in reiserfsck */ - replace_key(tb, tb->CFL[0], tb->lkey[0],tbS0,0); - - } - break; - - case M_PASTE: { /* append item in S[0] */ - struct item_head * pasted; - - pasted = B_N_PITEM_HEAD (tbS0, item_pos); - /* when directory, may be new entry already pasted */ - if (is_direntry_le_ih (pasted)) { - if ( pos_in_item >= 0 && - pos_in_item <= ih_entry_count(pasted) ) { - - RFALSE( ! tb->insert_size[0], - "PAP-12260: insert_size is 0 already"); - - /* prepare space */ - bi.tb = tb; - bi.bi_bh = tbS0; - bi.bi_parent = PATH_H_PPARENT (tb->tb_path, 0); - bi.bi_position = PATH_H_POSITION (tb->tb_path, 1); - leaf_paste_in_buffer(&bi, item_pos, pos_in_item, tb->insert_size[0], body, zeros_num); - - /* paste entry */ - leaf_paste_entries ( - bi.bi_bh, item_pos, pos_in_item, 1, (struct reiserfs_de_head *)body, - body + DEH_SIZE, tb->insert_size[0] - ); - if ( ! item_pos && ! pos_in_item ) { - RFALSE( !tb->CFL[0] || !tb->L[0], - "PAP-12270: CFL[0]/L[0] must be specified"); - if (tb->CFL[0]) { - replace_key(tb, tb->CFL[0], tb->lkey[0],tbS0,0); + /* if the affected item was not wholly shifted then we perform all necessary operations on that part or whole of the + affected item which remains in S */ + if (0 <= item_pos && item_pos < tb->s0num) { /* if we must insert or append into buffer S[0] */ + + switch (flag) { + case M_INSERT: /* insert item into S[0] */ + bi.tb = tb; + bi.bi_bh = tbS0; + bi.bi_parent = PATH_H_PPARENT(tb->tb_path, 0); + bi.bi_position = PATH_H_POSITION(tb->tb_path, 1); + leaf_insert_into_buf(&bi, item_pos, ih, body, + zeros_num); + + /* If we insert the first key change the delimiting key */ + if (item_pos == 0) { + if (tb->CFL[0]) /* can be 0 in reiserfsck */ + replace_key(tb, tb->CFL[0], tb->lkey[0], + tbS0, 0); } - } - tb->insert_size[0] = 0; - } - } else { /* regular object */ - if ( pos_in_item == ih_item_len(pasted) ) { - - RFALSE( tb->insert_size[0] <= 0, - "PAP-12275: insert size must not be %d", - tb->insert_size[0]); - bi.tb = tb; - bi.bi_bh = tbS0; - bi.bi_parent = PATH_H_PPARENT (tb->tb_path, 0); - bi.bi_position = PATH_H_POSITION (tb->tb_path, 1); - leaf_paste_in_buffer (&bi, item_pos, pos_in_item, tb->insert_size[0], body, zeros_num); - - if (is_indirect_le_ih (pasted)) { + break; + + case M_PASTE:{ /* append item in S[0] */ + struct item_head *pasted; + + pasted = B_N_PITEM_HEAD(tbS0, item_pos); + /* when directory, may be new entry already pasted */ + if (is_direntry_le_ih(pasted)) { + if (pos_in_item >= 0 && + pos_in_item <= + ih_entry_count(pasted)) { + + RFALSE(!tb->insert_size[0], + "PAP-12260: insert_size is 0 already"); + + /* prepare space */ + bi.tb = tb; + bi.bi_bh = tbS0; + bi.bi_parent = + PATH_H_PPARENT(tb->tb_path, + 0); + bi.bi_position = + PATH_H_POSITION(tb->tb_path, + 1); + leaf_paste_in_buffer(&bi, + item_pos, + pos_in_item, + tb-> + insert_size + [0], body, + zeros_num); + + /* paste entry */ + leaf_paste_entries(bi.bi_bh, + item_pos, + pos_in_item, + 1, + (struct + reiserfs_de_head + *)body, + body + + DEH_SIZE, + tb-> + insert_size + [0] + ); + if (!item_pos && !pos_in_item) { + RFALSE(!tb->CFL[0] + || !tb->L[0], + "PAP-12270: CFL[0]/L[0] must be specified"); + if (tb->CFL[0]) { + replace_key(tb, + tb-> + CFL + [0], + tb-> + lkey + [0], + tbS0, + 0); + + } + } + tb->insert_size[0] = 0; + } + } else { /* regular object */ + if (pos_in_item == ih_item_len(pasted)) { + + RFALSE(tb->insert_size[0] <= 0, + "PAP-12275: insert size must not be %d", + tb->insert_size[0]); + bi.tb = tb; + bi.bi_bh = tbS0; + bi.bi_parent = + PATH_H_PPARENT(tb->tb_path, + 0); + bi.bi_position = + PATH_H_POSITION(tb->tb_path, + 1); + leaf_paste_in_buffer(&bi, + item_pos, + pos_in_item, + tb-> + insert_size + [0], body, + zeros_num); + + if (is_indirect_le_ih(pasted)) { #if 0 - RFALSE( tb->insert_size[0] != UNFM_P_SIZE, - "PAP-12280: insert_size for indirect item must be %d, not %d", - UNFM_P_SIZE, tb->insert_size[0]); + RFALSE(tb-> + insert_size[0] != + UNFM_P_SIZE, + "PAP-12280: insert_size for indirect item must be %d, not %d", + UNFM_P_SIZE, + tb-> + insert_size[0]); #endif - set_ih_free_space (pasted, 0); - } - tb->insert_size[0] = 0; - } - + set_ih_free_space + (pasted, 0); + } + tb->insert_size[0] = 0; + } #ifdef CONFIG_REISERFS_CHECK - else { - if ( tb->insert_size[0] ) { - print_cur_tb ("12285"); - reiserfs_panic (tb->tb_sb, "PAP-12285: balance_leaf: insert_size must be 0 (%d)", tb->insert_size[0]); - } + else { + if (tb->insert_size[0]) { + print_cur_tb("12285"); + reiserfs_panic(tb-> + tb_sb, + "PAP-12285: balance_leaf: insert_size must be 0 (%d)", + tb-> + insert_size + [0]); + } + } +#endif /* CONFIG_REISERFS_CHECK */ + + } + } /* case M_PASTE: */ } -#endif /* CONFIG_REISERFS_CHECK */ - - } - } /* case M_PASTE: */ } - } - #ifdef CONFIG_REISERFS_CHECK - if ( flag == M_PASTE && tb->insert_size[0] ) { - print_cur_tb ("12290"); - reiserfs_panic (tb->tb_sb, "PAP-12290: balance_leaf: insert_size is still not 0 (%d)", tb->insert_size[0]); - } -#endif /* CONFIG_REISERFS_CHECK */ - - return 0; -} /* Leaf level of the tree is balanced (end of balance_leaf) */ - + if (flag == M_PASTE && tb->insert_size[0]) { + print_cur_tb("12290"); + reiserfs_panic(tb->tb_sb, + "PAP-12290: balance_leaf: insert_size is still not 0 (%d)", + tb->insert_size[0]); + } +#endif /* CONFIG_REISERFS_CHECK */ + return 0; +} /* Leaf level of the tree is balanced (end of balance_leaf) */ /* Make empty node */ -void make_empty_node (struct buffer_info * bi) +void make_empty_node(struct buffer_info *bi) { - struct block_head * blkh; + struct block_head *blkh; - RFALSE( bi->bi_bh == NULL, "PAP-12295: pointer to the buffer is NULL"); + RFALSE(bi->bi_bh == NULL, "PAP-12295: pointer to the buffer is NULL"); - blkh = B_BLK_HEAD(bi->bi_bh); - set_blkh_nr_item( blkh, 0 ); - set_blkh_free_space( blkh, MAX_CHILD_SIZE(bi->bi_bh) ); + blkh = B_BLK_HEAD(bi->bi_bh); + set_blkh_nr_item(blkh, 0); + set_blkh_free_space(blkh, MAX_CHILD_SIZE(bi->bi_bh)); - if (bi->bi_parent) - B_N_CHILD (bi->bi_parent, bi->bi_position)->dc_size = 0; /* Endian safe if 0 */ + if (bi->bi_parent) + B_N_CHILD(bi->bi_parent, bi->bi_position)->dc_size = 0; /* Endian safe if 0 */ } - /* Get first empty buffer */ -struct buffer_head * get_FEB (struct tree_balance * tb) +struct buffer_head *get_FEB(struct tree_balance *tb) { - int i; - struct buffer_head * first_b; - struct buffer_info bi; - - for (i = 0; i < MAX_FEB_SIZE; i ++) - if (tb->FEB[i] != 0) - break; - - if (i == MAX_FEB_SIZE) - reiserfs_panic(tb->tb_sb, "vs-12300: get_FEB: FEB list is empty"); - - bi.tb = tb; - bi.bi_bh = first_b = tb->FEB[i]; - bi.bi_parent = NULL; - bi.bi_position = 0; - make_empty_node (&bi); - set_buffer_uptodate(first_b); - tb->FEB[i] = NULL; - tb->used[i] = first_b; - - return(first_b); -} + int i; + struct buffer_head *first_b; + struct buffer_info bi; + for (i = 0; i < MAX_FEB_SIZE; i++) + if (tb->FEB[i] != 0) + break; + + if (i == MAX_FEB_SIZE) + reiserfs_panic(tb->tb_sb, + "vs-12300: get_FEB: FEB list is empty"); + + bi.tb = tb; + bi.bi_bh = first_b = tb->FEB[i]; + bi.bi_parent = NULL; + bi.bi_position = 0; + make_empty_node(&bi); + set_buffer_uptodate(first_b); + tb->FEB[i] = NULL; + tb->used[i] = first_b; + + return (first_b); +} /* This is now used because reiserfs_free_block has to be able to ** schedule. */ -static void store_thrown (struct tree_balance * tb, struct buffer_head * bh) +static void store_thrown(struct tree_balance *tb, struct buffer_head *bh) { - int i; - - if (buffer_dirty (bh)) - reiserfs_warning (tb->tb_sb, "store_thrown deals with dirty buffer"); - for (i = 0; i < sizeof (tb->thrown)/sizeof (tb->thrown[0]); i ++) - if (!tb->thrown[i]) { - tb->thrown[i] = bh; - get_bh(bh) ; /* free_thrown puts this */ - return; - } - reiserfs_warning (tb->tb_sb, "store_thrown: too many thrown buffers"); + int i; + + if (buffer_dirty(bh)) + reiserfs_warning(tb->tb_sb, + "store_thrown deals with dirty buffer"); + for (i = 0; i < sizeof(tb->thrown) / sizeof(tb->thrown[0]); i++) + if (!tb->thrown[i]) { + tb->thrown[i] = bh; + get_bh(bh); /* free_thrown puts this */ + return; + } + reiserfs_warning(tb->tb_sb, "store_thrown: too many thrown buffers"); } -static void free_thrown(struct tree_balance *tb) { - int i ; - b_blocknr_t blocknr ; - for (i = 0; i < sizeof (tb->thrown)/sizeof (tb->thrown[0]); i++) { - if (tb->thrown[i]) { - blocknr = tb->thrown[i]->b_blocknr ; - if (buffer_dirty (tb->thrown[i])) - reiserfs_warning (tb->tb_sb, - "free_thrown deals with dirty buffer %d", - blocknr); - brelse(tb->thrown[i]) ; /* incremented in store_thrown */ - reiserfs_free_block (tb->transaction_handle, NULL, blocknr, 0); +static void free_thrown(struct tree_balance *tb) +{ + int i; + b_blocknr_t blocknr; + for (i = 0; i < sizeof(tb->thrown) / sizeof(tb->thrown[0]); i++) { + if (tb->thrown[i]) { + blocknr = tb->thrown[i]->b_blocknr; + if (buffer_dirty(tb->thrown[i])) + reiserfs_warning(tb->tb_sb, + "free_thrown deals with dirty buffer %d", + blocknr); + brelse(tb->thrown[i]); /* incremented in store_thrown */ + reiserfs_free_block(tb->transaction_handle, NULL, + blocknr, 0); + } } - } } -void reiserfs_invalidate_buffer (struct tree_balance * tb, struct buffer_head * bh) +void reiserfs_invalidate_buffer(struct tree_balance *tb, struct buffer_head *bh) { - struct block_head *blkh; - blkh = B_BLK_HEAD(bh); - set_blkh_level( blkh, FREE_LEVEL ); - set_blkh_nr_item( blkh, 0 ); - - clear_buffer_dirty(bh); - store_thrown (tb, bh); + struct block_head *blkh; + blkh = B_BLK_HEAD(bh); + set_blkh_level(blkh, FREE_LEVEL); + set_blkh_nr_item(blkh, 0); + + clear_buffer_dirty(bh); + store_thrown(tb, bh); } /* Replace n_dest'th key in buffer dest by n_src'th key of buffer src.*/ -void replace_key (struct tree_balance * tb, struct buffer_head * dest, int n_dest, - struct buffer_head * src, int n_src) +void replace_key(struct tree_balance *tb, struct buffer_head *dest, int n_dest, + struct buffer_head *src, int n_src) { - RFALSE( dest == NULL || src == NULL, - "vs-12305: source or destination buffer is 0 (src=%p, dest=%p)", - src, dest); - RFALSE( ! B_IS_KEYS_LEVEL (dest), - "vs-12310: invalid level (%z) for destination buffer. dest must be leaf", - dest); - RFALSE( n_dest < 0 || n_src < 0, - "vs-12315: src(%d) or dest(%d) key number < 0", n_src, n_dest); - RFALSE( n_dest >= B_NR_ITEMS(dest) || n_src >= B_NR_ITEMS(src), - "vs-12320: src(%d(%d)) or dest(%d(%d)) key number is too big", - n_src, B_NR_ITEMS(src), n_dest, B_NR_ITEMS(dest)); - - if (B_IS_ITEMS_LEVEL (src)) - /* source buffer contains leaf node */ - memcpy (B_N_PDELIM_KEY(dest,n_dest), B_N_PITEM_HEAD(src,n_src), KEY_SIZE); - else - memcpy (B_N_PDELIM_KEY(dest,n_dest), B_N_PDELIM_KEY(src,n_src), KEY_SIZE); - - do_balance_mark_internal_dirty (tb, dest, 0); + RFALSE(dest == NULL || src == NULL, + "vs-12305: source or destination buffer is 0 (src=%p, dest=%p)", + src, dest); + RFALSE(!B_IS_KEYS_LEVEL(dest), + "vs-12310: invalid level (%z) for destination buffer. dest must be leaf", + dest); + RFALSE(n_dest < 0 || n_src < 0, + "vs-12315: src(%d) or dest(%d) key number < 0", n_src, n_dest); + RFALSE(n_dest >= B_NR_ITEMS(dest) || n_src >= B_NR_ITEMS(src), + "vs-12320: src(%d(%d)) or dest(%d(%d)) key number is too big", + n_src, B_NR_ITEMS(src), n_dest, B_NR_ITEMS(dest)); + + if (B_IS_ITEMS_LEVEL(src)) + /* source buffer contains leaf node */ + memcpy(B_N_PDELIM_KEY(dest, n_dest), B_N_PITEM_HEAD(src, n_src), + KEY_SIZE); + else + memcpy(B_N_PDELIM_KEY(dest, n_dest), B_N_PDELIM_KEY(src, n_src), + KEY_SIZE); + + do_balance_mark_internal_dirty(tb, dest, 0); } - -int get_left_neighbor_position ( - struct tree_balance * tb, - int h - ) +int get_left_neighbor_position(struct tree_balance *tb, int h) { - int Sh_position = PATH_H_POSITION (tb->tb_path, h + 1); + int Sh_position = PATH_H_POSITION(tb->tb_path, h + 1); - RFALSE( PATH_H_PPARENT (tb->tb_path, h) == 0 || tb->FL[h] == 0, - "vs-12325: FL[%d](%p) or F[%d](%p) does not exist", - h, tb->FL[h], h, PATH_H_PPARENT (tb->tb_path, h)); + RFALSE(PATH_H_PPARENT(tb->tb_path, h) == 0 || tb->FL[h] == 0, + "vs-12325: FL[%d](%p) or F[%d](%p) does not exist", + h, tb->FL[h], h, PATH_H_PPARENT(tb->tb_path, h)); - if (Sh_position == 0) - return B_NR_ITEMS (tb->FL[h]); - else - return Sh_position - 1; + if (Sh_position == 0) + return B_NR_ITEMS(tb->FL[h]); + else + return Sh_position - 1; } - -int get_right_neighbor_position (struct tree_balance * tb, int h) +int get_right_neighbor_position(struct tree_balance *tb, int h) { - int Sh_position = PATH_H_POSITION (tb->tb_path, h + 1); + int Sh_position = PATH_H_POSITION(tb->tb_path, h + 1); - RFALSE( PATH_H_PPARENT (tb->tb_path, h) == 0 || tb->FR[h] == 0, - "vs-12330: F[%d](%p) or FR[%d](%p) does not exist", - h, PATH_H_PPARENT (tb->tb_path, h), h, tb->FR[h]); + RFALSE(PATH_H_PPARENT(tb->tb_path, h) == 0 || tb->FR[h] == 0, + "vs-12330: F[%d](%p) or FR[%d](%p) does not exist", + h, PATH_H_PPARENT(tb->tb_path, h), h, tb->FR[h]); - if (Sh_position == B_NR_ITEMS (PATH_H_PPARENT (tb->tb_path, h))) - return 0; - else - return Sh_position + 1; + if (Sh_position == B_NR_ITEMS(PATH_H_PPARENT(tb->tb_path, h))) + return 0; + else + return Sh_position + 1; } - #ifdef CONFIG_REISERFS_CHECK -int is_reusable (struct super_block * s, b_blocknr_t block, int bit_value); -static void check_internal_node (struct super_block * s, struct buffer_head * bh, char * mes) +int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value); +static void check_internal_node(struct super_block *s, struct buffer_head *bh, + char *mes) { - struct disk_child * dc; - int i; - - RFALSE( !bh, "PAP-12336: bh == 0"); - - if (!bh || !B_IS_IN_TREE (bh)) - return; - - RFALSE( !buffer_dirty (bh) && - !(buffer_journaled(bh) || buffer_journal_dirty(bh)), - "PAP-12337: buffer (%b) must be dirty", bh); - dc = B_N_CHILD (bh, 0); - - for (i = 0; i <= B_NR_ITEMS (bh); i ++, dc ++) { - if (!is_reusable (s, dc_block_number(dc), 1) ) { - print_cur_tb (mes); - reiserfs_panic (s, "PAP-12338: check_internal_node: invalid child pointer %y in %b", dc, bh); - } - } -} + struct disk_child *dc; + int i; + RFALSE(!bh, "PAP-12336: bh == 0"); -static int locked_or_not_in_tree (struct buffer_head * bh, char * which) -{ - if ( (!buffer_journal_prepared (bh) && buffer_locked (bh)) || - !B_IS_IN_TREE (bh) ) { - reiserfs_warning (NULL, "vs-12339: locked_or_not_in_tree: %s (%b)", - which, bh); - return 1; - } - return 0; -} + if (!bh || !B_IS_IN_TREE(bh)) + return; + RFALSE(!buffer_dirty(bh) && + !(buffer_journaled(bh) || buffer_journal_dirty(bh)), + "PAP-12337: buffer (%b) must be dirty", bh); + dc = B_N_CHILD(bh, 0); -static int check_before_balancing (struct tree_balance * tb) -{ - int retval = 0; - - if ( cur_tb ) { - reiserfs_panic (tb->tb_sb, "vs-12335: check_before_balancing: " - "suspect that schedule occurred based on cur_tb not being null at this point in code. " - "do_balance cannot properly handle schedule occurring while it runs."); - } - - /* double check that buffers that we will modify are unlocked. (fix_nodes should already have - prepped all of these for us). */ - if ( tb->lnum[0] ) { - retval |= locked_or_not_in_tree (tb->L[0], "L[0]"); - retval |= locked_or_not_in_tree (tb->FL[0], "FL[0]"); - retval |= locked_or_not_in_tree (tb->CFL[0], "CFL[0]"); - check_leaf (tb->L[0]); - } - if ( tb->rnum[0] ) { - retval |= locked_or_not_in_tree (tb->R[0], "R[0]"); - retval |= locked_or_not_in_tree (tb->FR[0], "FR[0]"); - retval |= locked_or_not_in_tree (tb->CFR[0], "CFR[0]"); - check_leaf (tb->R[0]); - } - retval |= locked_or_not_in_tree (PATH_PLAST_BUFFER (tb->tb_path), "S[0]"); - check_leaf (PATH_PLAST_BUFFER (tb->tb_path)); - - return retval; + for (i = 0; i <= B_NR_ITEMS(bh); i++, dc++) { + if (!is_reusable(s, dc_block_number(dc), 1)) { + print_cur_tb(mes); + reiserfs_panic(s, + "PAP-12338: check_internal_node: invalid child pointer %y in %b", + dc, bh); + } + } } +static int locked_or_not_in_tree(struct buffer_head *bh, char *which) +{ + if ((!buffer_journal_prepared(bh) && buffer_locked(bh)) || + !B_IS_IN_TREE(bh)) { + reiserfs_warning(NULL, + "vs-12339: locked_or_not_in_tree: %s (%b)", + which, bh); + return 1; + } + return 0; +} -static void check_after_balance_leaf (struct tree_balance * tb) +static int check_before_balancing(struct tree_balance *tb) { - if (tb->lnum[0]) { - if (B_FREE_SPACE (tb->L[0]) != - MAX_CHILD_SIZE (tb->L[0]) - dc_size(B_N_CHILD (tb->FL[0], get_left_neighbor_position (tb, 0)))) { - print_cur_tb ("12221"); - reiserfs_panic (tb->tb_sb, "PAP-12355: check_after_balance_leaf: shift to left was incorrect"); + int retval = 0; + + if (cur_tb) { + reiserfs_panic(tb->tb_sb, "vs-12335: check_before_balancing: " + "suspect that schedule occurred based on cur_tb not being null at this point in code. " + "do_balance cannot properly handle schedule occurring while it runs."); } - } - if (tb->rnum[0]) { - if (B_FREE_SPACE (tb->R[0]) != - MAX_CHILD_SIZE (tb->R[0]) - dc_size(B_N_CHILD (tb->FR[0], get_right_neighbor_position (tb, 0)))) { - print_cur_tb ("12222"); - reiserfs_panic (tb->tb_sb, "PAP-12360: check_after_balance_leaf: shift to right was incorrect"); + + /* double check that buffers that we will modify are unlocked. (fix_nodes should already have + prepped all of these for us). */ + if (tb->lnum[0]) { + retval |= locked_or_not_in_tree(tb->L[0], "L[0]"); + retval |= locked_or_not_in_tree(tb->FL[0], "FL[0]"); + retval |= locked_or_not_in_tree(tb->CFL[0], "CFL[0]"); + check_leaf(tb->L[0]); } - } - if (PATH_H_PBUFFER(tb->tb_path,1) && - (B_FREE_SPACE (PATH_H_PBUFFER(tb->tb_path,0)) != - (MAX_CHILD_SIZE (PATH_H_PBUFFER(tb->tb_path,0)) - - dc_size(B_N_CHILD (PATH_H_PBUFFER(tb->tb_path,1), - PATH_H_POSITION (tb->tb_path, 1)))) )) { - int left = B_FREE_SPACE (PATH_H_PBUFFER(tb->tb_path,0)); - int right = (MAX_CHILD_SIZE (PATH_H_PBUFFER(tb->tb_path,0)) - - dc_size(B_N_CHILD (PATH_H_PBUFFER(tb->tb_path,1), - PATH_H_POSITION (tb->tb_path, 1)))); - print_cur_tb ("12223"); - reiserfs_warning (tb->tb_sb, - "B_FREE_SPACE (PATH_H_PBUFFER(tb->tb_path,0)) = %d; " - "MAX_CHILD_SIZE (%d) - dc_size( %y, %d ) [%d] = %d", - left, - MAX_CHILD_SIZE (PATH_H_PBUFFER(tb->tb_path,0)), - PATH_H_PBUFFER(tb->tb_path,1), - PATH_H_POSITION (tb->tb_path, 1), - dc_size(B_N_CHILD (PATH_H_PBUFFER(tb->tb_path,1), PATH_H_POSITION (tb->tb_path, 1 )) ), - right ); - reiserfs_panic (tb->tb_sb, "PAP-12365: check_after_balance_leaf: S is incorrect"); - } -} + if (tb->rnum[0]) { + retval |= locked_or_not_in_tree(tb->R[0], "R[0]"); + retval |= locked_or_not_in_tree(tb->FR[0], "FR[0]"); + retval |= locked_or_not_in_tree(tb->CFR[0], "CFR[0]"); + check_leaf(tb->R[0]); + } + retval |= locked_or_not_in_tree(PATH_PLAST_BUFFER(tb->tb_path), "S[0]"); + check_leaf(PATH_PLAST_BUFFER(tb->tb_path)); + return retval; +} -static void check_leaf_level (struct tree_balance * tb) +static void check_after_balance_leaf(struct tree_balance *tb) { - check_leaf (tb->L[0]); - check_leaf (tb->R[0]); - check_leaf (PATH_PLAST_BUFFER (tb->tb_path)); + if (tb->lnum[0]) { + if (B_FREE_SPACE(tb->L[0]) != + MAX_CHILD_SIZE(tb->L[0]) - + dc_size(B_N_CHILD + (tb->FL[0], get_left_neighbor_position(tb, 0)))) { + print_cur_tb("12221"); + reiserfs_panic(tb->tb_sb, + "PAP-12355: check_after_balance_leaf: shift to left was incorrect"); + } + } + if (tb->rnum[0]) { + if (B_FREE_SPACE(tb->R[0]) != + MAX_CHILD_SIZE(tb->R[0]) - + dc_size(B_N_CHILD + (tb->FR[0], get_right_neighbor_position(tb, 0)))) { + print_cur_tb("12222"); + reiserfs_panic(tb->tb_sb, + "PAP-12360: check_after_balance_leaf: shift to right was incorrect"); + } + } + if (PATH_H_PBUFFER(tb->tb_path, 1) && + (B_FREE_SPACE(PATH_H_PBUFFER(tb->tb_path, 0)) != + (MAX_CHILD_SIZE(PATH_H_PBUFFER(tb->tb_path, 0)) - + dc_size(B_N_CHILD(PATH_H_PBUFFER(tb->tb_path, 1), + PATH_H_POSITION(tb->tb_path, 1)))))) { + int left = B_FREE_SPACE(PATH_H_PBUFFER(tb->tb_path, 0)); + int right = (MAX_CHILD_SIZE(PATH_H_PBUFFER(tb->tb_path, 0)) - + dc_size(B_N_CHILD(PATH_H_PBUFFER(tb->tb_path, 1), + PATH_H_POSITION(tb->tb_path, + 1)))); + print_cur_tb("12223"); + reiserfs_warning(tb->tb_sb, + "B_FREE_SPACE (PATH_H_PBUFFER(tb->tb_path,0)) = %d; " + "MAX_CHILD_SIZE (%d) - dc_size( %y, %d ) [%d] = %d", + left, + MAX_CHILD_SIZE(PATH_H_PBUFFER(tb->tb_path, 0)), + PATH_H_PBUFFER(tb->tb_path, 1), + PATH_H_POSITION(tb->tb_path, 1), + dc_size(B_N_CHILD + (PATH_H_PBUFFER(tb->tb_path, 1), + PATH_H_POSITION(tb->tb_path, 1))), + right); + reiserfs_panic(tb->tb_sb, + "PAP-12365: check_after_balance_leaf: S is incorrect"); + } } -static void check_internal_levels (struct tree_balance * tb) +static void check_leaf_level(struct tree_balance *tb) { - int h; + check_leaf(tb->L[0]); + check_leaf(tb->R[0]); + check_leaf(PATH_PLAST_BUFFER(tb->tb_path)); +} - /* check all internal nodes */ - for (h = 1; tb->insert_size[h]; h ++) { - check_internal_node (tb->tb_sb, PATH_H_PBUFFER (tb->tb_path, h), "BAD BUFFER ON PATH"); - if (tb->lnum[h]) - check_internal_node (tb->tb_sb, tb->L[h], "BAD L"); - if (tb->rnum[h]) - check_internal_node (tb->tb_sb, tb->R[h], "BAD R"); - } +static void check_internal_levels(struct tree_balance *tb) +{ + int h; + + /* check all internal nodes */ + for (h = 1; tb->insert_size[h]; h++) { + check_internal_node(tb->tb_sb, PATH_H_PBUFFER(tb->tb_path, h), + "BAD BUFFER ON PATH"); + if (tb->lnum[h]) + check_internal_node(tb->tb_sb, tb->L[h], "BAD L"); + if (tb->rnum[h]) + check_internal_node(tb->tb_sb, tb->R[h], "BAD R"); + } } #endif - - - - - /* Now we have all of the buffers that must be used in balancing of the tree. We rely on the assumption that schedule() will not occur while do_balance works. ( Only interrupt handlers are acceptable.) @@ -1484,114 +2029,109 @@ static void check_internal_levels (struct tree_balance * tb) */ -static inline void do_balance_starts (struct tree_balance *tb) +static inline void do_balance_starts(struct tree_balance *tb) { - /* use print_cur_tb() to see initial state of struct - tree_balance */ + /* use print_cur_tb() to see initial state of struct + tree_balance */ - /* store_print_tb (tb); */ + /* store_print_tb (tb); */ - /* do not delete, just comment it out */ + /* do not delete, just comment it out */ /* print_tb(flag, PATH_LAST_POSITION(tb->tb_path), tb->tb_path->pos_in_item, tb, "check");*/ - RFALSE( check_before_balancing (tb), "PAP-12340: locked buffers in TB"); + RFALSE(check_before_balancing(tb), "PAP-12340: locked buffers in TB"); #ifdef CONFIG_REISERFS_CHECK - cur_tb = tb; + cur_tb = tb; #endif } - -static inline void do_balance_completed (struct tree_balance * tb) +static inline void do_balance_completed(struct tree_balance *tb) { - + #ifdef CONFIG_REISERFS_CHECK - check_leaf_level (tb); - check_internal_levels (tb); - cur_tb = NULL; + check_leaf_level(tb); + check_internal_levels(tb); + cur_tb = NULL; #endif - /* reiserfs_free_block is no longer schedule safe. So, we need to - ** put the buffers we want freed on the thrown list during do_balance, - ** and then free them now - */ - - REISERFS_SB(tb->tb_sb)->s_do_balance ++; + /* reiserfs_free_block is no longer schedule safe. So, we need to + ** put the buffers we want freed on the thrown list during do_balance, + ** and then free them now + */ + REISERFS_SB(tb->tb_sb)->s_do_balance++; - /* release all nodes hold to perform the balancing */ - unfix_nodes(tb); + /* release all nodes hold to perform the balancing */ + unfix_nodes(tb); - free_thrown(tb) ; + free_thrown(tb); } +void do_balance(struct tree_balance *tb, /* tree_balance structure */ + struct item_head *ih, /* item header of inserted item */ + const char *body, /* body of inserted item or bytes to paste */ + int flag) +{ /* i - insert, d - delete + c - cut, p - paste + + Cut means delete part of an item + (includes removing an entry from a + directory). + + Delete means delete whole item. + + Insert means add a new item into the + tree. + + Paste means to append to the end of an + existing file or to insert a directory + entry. */ + int child_pos, /* position of a child node in its parent */ + h; /* level of the tree being processed */ + struct item_head insert_key[2]; /* in our processing of one level + we sometimes determine what + must be inserted into the next + higher level. This insertion + consists of a key or two keys + and their corresponding + pointers */ + struct buffer_head *insert_ptr[2]; /* inserted node-ptrs for the next + level */ + + tb->tb_mode = flag; + tb->need_balance_dirty = 0; + + if (FILESYSTEM_CHANGED_TB(tb)) { + reiserfs_panic(tb->tb_sb, + "clm-6000: do_balance, fs generation has changed\n"); + } + /* if we have no real work to do */ + if (!tb->insert_size[0]) { + reiserfs_warning(tb->tb_sb, + "PAP-12350: do_balance: insert_size == 0, mode == %c", + flag); + unfix_nodes(tb); + return; + } + atomic_inc(&(fs_generation(tb->tb_sb))); + do_balance_starts(tb); - - -void do_balance (struct tree_balance * tb, /* tree_balance structure */ - struct item_head * ih, /* item header of inserted item */ - const char * body, /* body of inserted item or bytes to paste */ - int flag) /* i - insert, d - delete - c - cut, p - paste - - Cut means delete part of an item - (includes removing an entry from a - directory). - - Delete means delete whole item. - - Insert means add a new item into the - tree. - - Paste means to append to the end of an - existing file or to insert a directory - entry. */ -{ - int child_pos, /* position of a child node in its parent */ - h; /* level of the tree being processed */ - struct item_head insert_key[2]; /* in our processing of one level - we sometimes determine what - must be inserted into the next - higher level. This insertion - consists of a key or two keys - and their corresponding - pointers */ - struct buffer_head *insert_ptr[2]; /* inserted node-ptrs for the next - level */ - - tb->tb_mode = flag; - tb->need_balance_dirty = 0; - - if (FILESYSTEM_CHANGED_TB(tb)) { - reiserfs_panic(tb->tb_sb, "clm-6000: do_balance, fs generation has changed\n") ; - } - /* if we have no real work to do */ - if ( ! tb->insert_size[0] ) { - reiserfs_warning (tb->tb_sb, - "PAP-12350: do_balance: insert_size == 0, mode == %c", - flag); - unfix_nodes(tb); - return; - } - - atomic_inc (&(fs_generation (tb->tb_sb))); - do_balance_starts (tb); - /* balance leaf returns 0 except if combining L R and S into one node. see balance_internal() for explanation of this - line of code.*/ - child_pos = PATH_H_B_ITEM_ORDER (tb->tb_path, 0) + - balance_leaf (tb, ih, body, flag, insert_key, insert_ptr); + line of code. */ + child_pos = PATH_H_B_ITEM_ORDER(tb->tb_path, 0) + + balance_leaf(tb, ih, body, flag, insert_key, insert_ptr); #ifdef CONFIG_REISERFS_CHECK - check_after_balance_leaf (tb); + check_after_balance_leaf(tb); #endif - /* Balance internal level of the tree. */ - for ( h = 1; h < MAX_HEIGHT && tb->insert_size[h]; h++ ) - child_pos = balance_internal (tb, h, child_pos, insert_key, insert_ptr); - + /* Balance internal level of the tree. */ + for (h = 1; h < MAX_HEIGHT && tb->insert_size[h]; h++) + child_pos = + balance_internal(tb, h, child_pos, insert_key, insert_ptr); - do_balance_completed (tb); + do_balance_completed(tb); } |
