This patch factors out a new balance_leaf_new_nodes_insert from the code
in balance_leaf responsible for pasting new content into existing items
that may have been shifted into new nodes in the tree.
It has not been reformatted yet.
Signed-off-by: Jeff Mahoney <jeffm@xxxxxxxx>
---
fs/reiserfs/do_balan.c | 306 +++++++++++++++++++++++++------------------------
1 file changed, 160 insertions(+), 146 deletions(-)
--- a/fs/reiserfs/do_balan.c
+++ b/fs/reiserfs/do_balan.c
@@ -804,6 +804,164 @@ static void balance_leaf_new_nodes_inser
}
}
+static void balance_leaf_new_nodes_paste(struct tree_balance *tb,
+ struct item_head *ih,
+ const char *body,
+ struct item_head *insert_key,
+ struct buffer_head **insert_ptr,
+ int i)
+{
+ struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
+ int n = B_NR_ITEMS(tbS0);
+ struct buffer_info bi;
+ if (n - tb->snum[i] <= tb->item_pos) { /* pasted item or part if it falls to S_new[i] */
+ if (tb->item_pos == n - tb->snum[i] && tb->sbytes[i] != -1) { /* we must shift part of the appended item */
+ struct item_head *aux_ih;
+
+ RFALSE(ih, "PAP-12210: ih must be 0");
+
+ aux_ih = item_head(tbS0, tb->item_pos);
+ if (is_direntry_le_ih(aux_ih)) {
+ /* we append to directory item */
+
+ int entry_count;
+
+ entry_count = ih_entry_count(aux_ih);
+
+ if (entry_count - tb->sbytes[i] < tb->pos_in_item && tb->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(tb->sbytes[i] - 1 >= entry_count,
+ "PAP-12220: there are no so much entries (%d), only %d",
+ tb->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, tb->snum[i], tb->sbytes[i] - 1, tb->S_new[i]);
+ /* Paste given directory entry to directory item */
+ buffer_info_init_bh(tb, &bi, tb->S_new[i]);
+ leaf_paste_in_buffer(&bi, 0, tb->pos_in_item - entry_count + tb->sbytes[i] - 1,
+ tb->insert_size[0], body, tb->zeroes_num);
+ /* paste new directory entry */
+ leaf_paste_entries(&bi, 0, tb->pos_in_item - entry_count + tb->sbytes[i] - 1, 1,
+ (struct reiserfs_de_head *) body,
+ body + DEH_SIZE, tb->insert_size[0]);
+ tb->insert_size[0] = 0;
+ tb->pos_in_item++;
+ } else { /* new directory entry doesn't fall into S_new[i] */
+ leaf_move_items(LEAF_FROM_S_TO_SNEW, tb, tb->snum[i], tb->sbytes[i], tb->S_new[i]);
+ }
+ } else { /* regular object */
+
+ int n_shift, n_rem, r_zeroes_number;
+ const char *r_body;
+
+ RFALSE(tb->pos_in_item != ih_item_len(item_head(tbS0, tb->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 = tb->sbytes[i] - tb->insert_size[0];
+ if (n_shift < 0)
+ n_shift = 0;
+ leaf_move_items(LEAF_FROM_S_TO_SNEW, tb, tb->snum[i], n_shift, tb->S_new[i]);
+
+ /* Calculate number of bytes which must remain in body after append to S_new[i] */
+ n_rem = tb->insert_size[0] - tb->sbytes[i];
+ if (n_rem < 0)
+ n_rem = 0;
+ /* Append part of body into S_new[0] */
+ buffer_info_init_bh(tb, &bi, tb->S_new[i]);
+ if (n_rem > tb->zeroes_num) {
+ r_zeroes_number = 0;
+ r_body = body + n_rem - tb->zeroes_num;
+ } else {
+ r_body = body;
+ r_zeroes_number = tb->zeroes_num - n_rem;
+ tb->zeroes_num -= r_zeroes_number;
+ }
+
+ leaf_paste_in_buffer(&bi, 0, n_shift,
+ tb->insert_size[0] - n_rem,
+ r_body, r_zeroes_number);
+ {
+ struct item_head *tmp;
+
+ tmp = item_head(tb->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)
+ tb->pos_in_item++;
+ }
+ } else
+ /* item falls wholly into S_new[i] */
+ {
+ int leaf_mi;
+ struct item_head *pasted;
+
+#ifdef CONFIG_REISERFS_CHECK
+ struct item_head *ih_check = item_head(tbS0, tb->item_pos);
+
+ if (!is_direntry_le_ih(ih_check)
+ && (tb->pos_in_item != ih_item_len(ih_check)
+ || tb->insert_size[0] <= 0))
+ reiserfs_panic(tb->tb_sb,
+ "PAP-12235",
+ "pos_in_item "
+ "must be equal "
+ "to ih_item_len");
+#endif /* CONFIG_REISERFS_CHECK */
+
+ leaf_mi = leaf_move_items(LEAF_FROM_S_TO_SNEW,
+ tb, tb->snum[i],
+ tb->sbytes[i],
+ tb->S_new[i]);
+
+ RFALSE(leaf_mi,
+ "PAP-12240: unexpected value returned by leaf_move_items (%d)",
+ leaf_mi);
+
+ /* paste into item */
+ buffer_info_init_bh(tb, &bi, tb->S_new[i]);
+ leaf_paste_in_buffer(&bi,
+ tb->item_pos - n + tb->snum[i],
+ tb->pos_in_item,
+ tb->insert_size[0],
+ body, tb->zeroes_num);
+
+ pasted = item_head(tb->S_new[i], tb->item_pos - n + tb->snum[i]);
+ if (is_direntry_le_ih(pasted)) {
+ leaf_paste_entries(&bi,
+ tb->item_pos - n + tb->snum[i],
+ tb->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);
+ tb->zeroes_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,
+ tb->snum[i], tb->sbytes[i], tb->S_new[i]);
+ }
+
+}
+
/**
* balance_leaf - reiserfs tree balancing algorithm
* @tb: tree balance state
@@ -953,152 +1111,8 @@ static int balance_leaf(struct tree_bala
break;
case M_PASTE: /* append item */
-
- if (n - tb->snum[i] <= tb->item_pos) { /* pasted item or part if it falls to S_new[i] */
- if (tb->item_pos == n - tb->snum[i] && tb->sbytes[i] != -1) { /* we must shift part of the appended item */
- struct item_head *aux_ih;
-
- RFALSE(ih, "PAP-12210: ih must be 0");
-
- aux_ih = item_head(tbS0, tb->item_pos);
- if (is_direntry_le_ih(aux_ih)) {
- /* we append to directory item */
-
- int entry_count;
-
- entry_count = ih_entry_count(aux_ih);
-
- if (entry_count - tb->sbytes[i] < tb->pos_in_item && tb->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(tb->sbytes[i] - 1 >= entry_count,
- "PAP-12220: there are no so much entries (%d), only %d",
- tb->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, tb->snum[i], tb->sbytes[i] - 1, tb->S_new[i]);
- /* Paste given directory entry to directory item */
- buffer_info_init_bh(tb, &bi, tb->S_new[i]);
- leaf_paste_in_buffer(&bi, 0, tb->pos_in_item - entry_count + tb->sbytes[i] - 1,
- tb->insert_size[0], body, tb->zeroes_num);
- /* paste new directory entry */
- leaf_paste_entries(&bi, 0, tb->pos_in_item - entry_count + tb->sbytes[i] - 1, 1,
- (struct reiserfs_de_head *) body,
- body + DEH_SIZE, tb->insert_size[0]);
- tb->insert_size[0] = 0;
- tb->pos_in_item++;
- } else { /* new directory entry doesn't fall into S_new[i] */
- leaf_move_items(LEAF_FROM_S_TO_SNEW, tb, tb->snum[i], tb->sbytes[i], tb->S_new[i]);
- }
- } else { /* regular object */
-
- int n_shift, n_rem, r_zeroes_number;
- const char *r_body;
-
- RFALSE(tb->pos_in_item != ih_item_len(item_head(tbS0, tb->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 = tb->sbytes[i] - tb->insert_size[0];
- if (n_shift < 0)
- n_shift = 0;
- leaf_move_items(LEAF_FROM_S_TO_SNEW, tb, tb->snum[i], n_shift, tb->S_new[i]);
-
- /* Calculate number of bytes which must remain in body after append to S_new[i] */
- n_rem = tb->insert_size[0] - tb->sbytes[i];
- if (n_rem < 0)
- n_rem = 0;
- /* Append part of body into S_new[0] */
- buffer_info_init_bh(tb, &bi, tb->S_new[i]);
- if (n_rem > tb->zeroes_num) {
- r_zeroes_number = 0;
- r_body = body + n_rem - tb->zeroes_num;
- } else {
- r_body = body;
- r_zeroes_number = tb->zeroes_num - n_rem;
- tb->zeroes_num -= r_zeroes_number;
- }
-
- leaf_paste_in_buffer(&bi, 0, n_shift,
- tb->insert_size[0] - n_rem,
- r_body, r_zeroes_number);
- {
- struct item_head *tmp;
-
- tmp = item_head(tb->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)
- tb->pos_in_item++;
- }
- } else
- /* item falls wholly into S_new[i] */
- {
- int leaf_mi;
- struct item_head *pasted;
-
-#ifdef CONFIG_REISERFS_CHECK
- struct item_head *ih_check = item_head(tbS0, tb->item_pos);
-
- if (!is_direntry_le_ih(ih_check)
- && (tb->pos_in_item != ih_item_len(ih_check)
- || tb->insert_size[0] <= 0))
- reiserfs_panic(tb->tb_sb,
- "PAP-12235",
- "pos_in_item "
- "must be equal "
- "to ih_item_len");
-#endif /* CONFIG_REISERFS_CHECK */
-
- leaf_mi = leaf_move_items(LEAF_FROM_S_TO_SNEW,
- tb, tb->snum[i],
- tb->sbytes[i],
- tb->S_new[i]);
-
- RFALSE(leaf_mi,
- "PAP-12240: unexpected value returned by leaf_move_items (%d)",
- leaf_mi);
-
- /* paste into item */
- buffer_info_init_bh(tb, &bi, tb->S_new[i]);
- leaf_paste_in_buffer(&bi,
- tb->item_pos - n + tb->snum[i],
- tb->pos_in_item,
- tb->insert_size[0],
- body, tb->zeroes_num);
-
- pasted = item_head(tb->S_new[i], tb->item_pos - n + tb->snum[i]);
- if (is_direntry_le_ih(pasted)) {
- leaf_paste_entries(&bi,
- tb->item_pos - n + tb->snum[i],
- tb->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);
- tb->zeroes_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,
- tb->snum[i], tb->sbytes[i], tb->S_new[i]);
- }
+ balance_leaf_new_nodes_paste(tb, ih, body, insert_key,
+ insert_ptr, i);
break;
default: /* cases d and t */
reiserfs_panic(tb->tb_sb, "PAP-12245",
--
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