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Btrfs: fix check_node and check_leaf to use less cpu

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-05-10 11:24:42 -04:00
committed by David Woodhouse
parent e37c9e6921
commit 8d7be552a7
2 changed files with 29 additions and 21 deletions
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44
fs/btrfs/ctree.c
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@@ -130,15 +130,17 @@ static int comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2)
static int check_node(struct btrfs_root *root, struct btrfs_path *path,
int level)
{
int i;
struct btrfs_node *parent = NULL;
struct btrfs_node *node = btrfs_buffer_node(path->nodes[level]);
int parent_slot;
int slot;
struct btrfs_key cpukey;
u32 nritems = btrfs_header_nritems(&node->header);
if (path->nodes[level + 1])
parent = btrfs_buffer_node(path->nodes[level + 1]);
parent_slot = path->slots[level + 1];
slot = path->slots[level];
BUG_ON(nritems == 0);
if (parent) {
struct btrfs_disk_key *parent_key;
@@ -149,10 +151,13 @@ static int check_node(struct btrfs_root *root, struct btrfs_path *path,
btrfs_header_blocknr(&node->header));
}
BUG_ON(nritems > BTRFS_NODEPTRS_PER_BLOCK(root));
for (i = 0; nritems > 1 && i < nritems - 2; i++) {
struct btrfs_key cpukey;
btrfs_disk_key_to_cpu(&cpukey, &node->ptrs[i + 1].key);
BUG_ON(comp_keys(&node->ptrs[i].key, &cpukey) >= 0);
if (slot != 0) {
btrfs_disk_key_to_cpu(&cpukey, &node->ptrs[slot - 1].key);
BUG_ON(comp_keys(&node->ptrs[slot].key, &cpukey) <= 0);
}
if (slot < nritems - 1) {
btrfs_disk_key_to_cpu(&cpukey, &node->ptrs[slot + 1].key);
BUG_ON(comp_keys(&node->ptrs[slot].key, &cpukey) >= 0);
}
return 0;
}
@@ -160,10 +165,12 @@ static int check_node(struct btrfs_root *root, struct btrfs_path *path,
static int check_leaf(struct btrfs_root *root, struct btrfs_path *path,
int level)
{
int i;
struct btrfs_leaf *leaf = btrfs_buffer_leaf(path->nodes[level]);
struct btrfs_node *parent = NULL;
int parent_slot;
int slot = path->slots[0];
struct btrfs_key cpukey;
u32 nritems = btrfs_header_nritems(&leaf->header);
if (path->nodes[level + 1])
@@ -182,19 +189,20 @@ static int check_leaf(struct btrfs_root *root, struct btrfs_path *path,
BUG_ON(btrfs_node_blockptr(parent, parent_slot) !=
btrfs_header_blocknr(&leaf->header));
}
for (i = 0; nritems > 1 && i < nritems - 2; i++) {
struct btrfs_key cpukey;
btrfs_disk_key_to_cpu(&cpukey, &leaf->items[i + 1].key);
BUG_ON(comp_keys(&leaf->items[i].key,
&cpukey) >= 0);
BUG_ON(btrfs_item_offset(leaf->items + i) !=
btrfs_item_end(leaf->items + i + 1));
if (i == 0) {
BUG_ON(btrfs_item_offset(leaf->items + i) +
btrfs_item_size(leaf->items + i) !=
BTRFS_LEAF_DATA_SIZE(root));
}
if (slot != 0) {
btrfs_disk_key_to_cpu(&cpukey, &leaf->items[slot - 1].key);
BUG_ON(comp_keys(&leaf->items[slot].key, &cpukey) <= 0);
BUG_ON(btrfs_item_offset(leaf->items + slot - 1) !=
btrfs_item_end(leaf->items + slot));
}
if (slot < nritems - 1) {
btrfs_disk_key_to_cpu(&cpukey, &leaf->items[slot + 1].key);
BUG_ON(comp_keys(&leaf->items[slot].key, &cpukey) >= 0);
BUG_ON(btrfs_item_offset(leaf->items + slot) !=
btrfs_item_end(leaf->items + slot + 1));
}
BUG_ON(btrfs_item_offset(leaf->items) +
btrfs_item_size(leaf->items) != BTRFS_LEAF_DATA_SIZE(root));
return 0;
}