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reiserfs: balance_leaf refactor, pull out balance_leaf_finish_node_paste
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This patch factors out a new balance_leaf_finish_node_paste from the code
in balance_leaf responsible for pasting new content into existing items
held in S[0].

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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@jeffmahoney @jankara
jeffmahoney authored and jankara committed May 7, 2014
1 parent 8c480ea commit 7f447ba
Showing 1 changed file with 79 additions and 71 deletions.
150 changes: 79 additions & 71 deletions fs/reiserfs/do_balan.c
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Original file line number Diff line number Diff line change
Expand Up @@ -982,6 +982,82 @@ static void balance_leaf_finish_node_insert(struct tree_balance *tb,
}
}

static void balance_leaf_finish_node_paste(struct tree_balance *tb,
struct item_head *ih,
const char *body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
struct buffer_info bi;
struct item_head *pasted;

pasted = item_head(tbS0, tb->item_pos);
/* when directory, may be new entry already pasted */
if (is_direntry_le_ih(pasted)) {
if (tb->pos_in_item >= 0 && tb->pos_in_item <= ih_entry_count(pasted)) {

RFALSE(!tb->insert_size[0],
"PAP-12260: insert_size is 0 already");

/* prepare space */
buffer_info_init_tbS0(tb, &bi);
leaf_paste_in_buffer(&bi, tb->item_pos, tb->pos_in_item,
tb->insert_size[0], body,
tb->zeroes_num);

/* paste entry */
leaf_paste_entries(&bi, tb->item_pos, tb->pos_in_item, 1,
(struct reiserfs_de_head *)body,
body + DEH_SIZE,
tb->insert_size[0]);
if (!tb->item_pos && !tb->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 (tb->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]);
buffer_info_init_tbS0(tb, &bi);
leaf_paste_in_buffer(&bi, tb->item_pos, tb->pos_in_item,
tb->insert_size[0], body, tb->zeroes_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]);
#endif
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",
"insert_size "
"must be 0 "
"(%d)",
tb->insert_size[0]);
}
}
#endif /* CONFIG_REISERFS_CHECK */

}
}

/**
* balance_leaf - reiserfs tree balancing algorithm
* @tb: tree balance state
Expand All @@ -1002,7 +1078,6 @@ static int balance_leaf(struct tree_balance *tb, struct item_head *ih,
struct buffer_head **insert_ptr)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
struct buffer_info bi;
int n, i;

PROC_INFO_INC(tb->tb_sb, balance_at[0]);
Expand Down Expand Up @@ -1159,76 +1234,9 @@ static int balance_leaf(struct tree_balance *tb, struct item_head *ih,
balance_leaf_finish_node_insert(tb, ih, body);
break;

case M_PASTE:{ /* append item in S[0] */
struct item_head *pasted;

pasted = item_head(tbS0, tb->item_pos);
/* when directory, may be new entry already pasted */
if (is_direntry_le_ih(pasted)) {
if (tb->pos_in_item >= 0 && tb->pos_in_item <= ih_entry_count(pasted)) {

RFALSE(!tb->insert_size[0],
"PAP-12260: insert_size is 0 already");

/* prepare space */
buffer_info_init_tbS0(tb, &bi);
leaf_paste_in_buffer(&bi, tb->item_pos, tb->pos_in_item,
tb->insert_size[0], body,
tb->zeroes_num);

/* paste entry */
leaf_paste_entries(&bi, tb->item_pos, tb->pos_in_item, 1,
(struct reiserfs_de_head *)body,
body + DEH_SIZE,
tb->insert_size[0]);
if (!tb->item_pos && !tb->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 (tb->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]);
buffer_info_init_tbS0(tb, &bi);
leaf_paste_in_buffer(&bi, tb->item_pos, tb->pos_in_item,
tb->insert_size[0], body, tb->zeroes_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]);
#endif
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",
"insert_size "
"must be 0 "
"(%d)",
tb->insert_size[0]);
}
}
#endif /* CONFIG_REISERFS_CHECK */

}
} /* case M_PASTE: */
case M_PASTE: /* append item in S[0] */
balance_leaf_finish_node_paste(tb, ih, body);
break;
}
}
#ifdef CONFIG_REISERFS_CHECK
Expand Down

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