mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-01-09 06:43:09 +00:00
reiserfs: balance_leaf refactor, pull out balance_leaf_new_nodes_paste
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@suse.com> Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jeff Mahoney
Jan Kara
parent
65ab18cb73
commit
9d496552b9
@ -804,6 +804,164 @@ static void balance_leaf_new_nodes_insert(struct tree_balance *tb,
|
||||
}
|
||||
}
|
||||
|
||||
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_balance *tb, struct item_head *ih,
|
||||
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",
|
||||
|
||||
Loading…
Reference in New Issue
Block a user