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Diffstat (limited to 'fs/btrfs/ctree.c')
-rw-r--r--fs/btrfs/ctree.c92
1 files changed, 54 insertions, 38 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index e43c827e0df..489019ac04b 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -95,19 +95,23 @@ int leaf_free_space(struct leaf *leaf)
/*
* compare two keys in a memcmp fashion
*/
-int comp_keys(struct key *k1, struct key *k2)
+int comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2)
{
- if (k1->objectid > k2->objectid)
+ struct btrfs_key k1;
+
+ btrfs_disk_key_to_cpu(&k1, disk);
+
+ if (k1.objectid > k2->objectid)
return 1;
- if (k1->objectid < k2->objectid)
+ if (k1.objectid < k2->objectid)
return -1;
- if (k1->flags > k2->flags)
+ if (k1.flags > k2->flags)
return 1;
- if (k1->flags < k2->flags)
+ if (k1.flags < k2->flags)
return -1;
- if (k1->offset > k2->offset)
+ if (k1.offset > k2->offset)
return 1;
- if (k1->offset < k2->offset)
+ if (k1.offset < k2->offset)
return -1;
return 0;
}
@@ -125,15 +129,18 @@ int check_node(struct ctree_path *path, int level)
parent_slot = path->slots[level + 1];
BUG_ON(nritems == 0);
if (parent) {
- struct key *parent_key;
+ struct btrfs_disk_key *parent_key;
parent_key = &parent->keys[parent_slot];
- BUG_ON(memcmp(parent_key, node->keys, sizeof(struct key)));
+ BUG_ON(memcmp(parent_key, node->keys,
+ sizeof(struct btrfs_disk_key)));
BUG_ON(parent->blockptrs[parent_slot] !=
btrfs_header_blocknr(&node->header));
}
BUG_ON(nritems > NODEPTRS_PER_BLOCK);
for (i = 0; nritems > 1 && i < nritems - 2; i++) {
- BUG_ON(comp_keys(&node->keys[i], &node->keys[i+1]) >= 0);
+ struct btrfs_key cpukey;
+ btrfs_disk_key_to_cpu(&cpukey, &node->keys[i + 1]);
+ BUG_ON(comp_keys(&node->keys[i], &cpukey) >= 0);
}
return 0;
}
@@ -155,16 +162,18 @@ int check_leaf(struct ctree_path *path, int level)
return 0;
if (parent) {
- struct key *parent_key;
+ struct btrfs_disk_key *parent_key;
parent_key = &parent->keys[parent_slot];
BUG_ON(memcmp(parent_key, &leaf->items[0].key,
- sizeof(struct key)));
+ sizeof(struct btrfs_disk_key)));
BUG_ON(parent->blockptrs[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,
- &leaf->items[i+1].key) >= 0);
+ &cpukey) >= 0);
BUG_ON(leaf->items[i].offset != leaf->items[i + 1].offset +
leaf->items[i + 1].size);
if (i == 0) {
@@ -191,18 +200,18 @@ int check_block(struct ctree_path *path, int level)
*
* slot may point to max if the key is bigger than all of the keys
*/
-int generic_bin_search(char *p, int item_size, struct key *key,
+int generic_bin_search(char *p, int item_size, struct btrfs_key *key,
int max, int *slot)
{
int low = 0;
int high = max;
int mid;
int ret;
- struct key *tmp;
+ struct btrfs_disk_key *tmp;
while(low < high) {
mid = (low + high) / 2;
- tmp = (struct key *)(p + mid * item_size);
+ tmp = (struct btrfs_disk_key *)(p + mid * item_size);
ret = comp_keys(tmp, key);
if (ret < 0)
@@ -222,7 +231,7 @@ int generic_bin_search(char *p, int item_size, struct key *key,
* simple bin_search frontend that does the right thing for
* leaves vs nodes
*/
-int bin_search(struct node *c, struct key *key, int *slot)
+int bin_search(struct node *c, struct btrfs_key *key, int *slot)
{
if (btrfs_is_leaf(c)) {
struct leaf *l = (struct leaf *)c;
@@ -230,7 +239,8 @@ int bin_search(struct node *c, struct key *key, int *slot)
key, btrfs_header_nritems(&c->header),
slot);
} else {
- return generic_bin_search((void *)c->keys, sizeof(struct key),
+ return generic_bin_search((void *)c->keys,
+ sizeof(struct btrfs_disk_key),
key, btrfs_header_nritems(&c->header),
slot);
}
@@ -339,7 +349,7 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
ret = wret;
} else {
memcpy(parent->keys + pslot + 1, right->keys,
- sizeof(struct key));
+ sizeof(struct btrfs_disk_key));
BUG_ON(list_empty(&parent_buf->dirty));
}
}
@@ -374,7 +384,8 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
ret = wret;
} else {
/* update the parent key to reflect our changes */
- memcpy(parent->keys + pslot, mid->keys, sizeof(struct key));
+ memcpy(parent->keys + pslot, mid->keys,
+ sizeof(struct btrfs_disk_key));
BUG_ON(list_empty(&parent_buf->dirty));
}
@@ -417,7 +428,7 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
* tree. if ins_len < 0, nodes will be merged as we walk down the tree (if
* possible)
*/
-int search_slot(struct ctree_root *root, struct key *key,
+int search_slot(struct ctree_root *root, struct btrfs_key *key,
struct ctree_path *p, int ins_len, int cow)
{
struct tree_buffer *b;
@@ -499,7 +510,7 @@ again:
* fixing up the blocks in ram so the tree is consistent.
*/
static int fixup_low_keys(struct ctree_root *root,
- struct ctree_path *path, struct key *key,
+ struct ctree_path *path, struct btrfs_disk_key *key,
int level)
{
int i;
@@ -546,12 +557,13 @@ static int push_node_left(struct ctree_root *root, struct tree_buffer *dst_buf,
push_items = src_nritems;
memcpy(dst->keys + dst_nritems, src->keys,
- push_items * sizeof(struct key));
+ push_items * sizeof(struct btrfs_disk_key));
memcpy(dst->blockptrs + dst_nritems, src->blockptrs,
push_items * sizeof(u64));
if (push_items < src_nritems) {
memmove(src->keys, src->keys + push_items,
- (src_nritems - push_items) * sizeof(struct key));
+ (src_nritems - push_items) *
+ sizeof(struct btrfs_disk_key));
memmove(src->blockptrs, src->blockptrs + push_items,
(src_nritems - push_items) * sizeof(u64));
}
@@ -598,11 +610,11 @@ static int balance_node_right(struct ctree_root *root,
push_items = max_push;
memmove(dst->keys + push_items, dst->keys,
- dst_nritems * sizeof(struct key));
+ dst_nritems * sizeof(struct btrfs_disk_key));
memmove(dst->blockptrs + push_items, dst->blockptrs,
dst_nritems * sizeof(u64));
memcpy(dst->keys, src->keys + src_nritems - push_items,
- push_items * sizeof(struct key));
+ push_items * sizeof(struct btrfs_disk_key));
memcpy(dst->blockptrs, src->blockptrs + src_nritems - push_items,
push_items * sizeof(u64));
@@ -627,7 +639,7 @@ static int insert_new_root(struct ctree_root *root,
struct tree_buffer *t;
struct node *lower;
struct node *c;
- struct key *lower_key;
+ struct btrfs_disk_key *lower_key;
BUG_ON(path->nodes[level]);
BUG_ON(path->nodes[level-1] != root->node);
@@ -645,7 +657,7 @@ static int insert_new_root(struct ctree_root *root,
lower_key = &((struct leaf *)lower)->items[0].key;
else
lower_key = lower->keys;
- memcpy(c->keys, lower_key, sizeof(struct key));
+ memcpy(c->keys, lower_key, sizeof(struct btrfs_disk_key));
c->blockptrs[0] = path->nodes[level-1]->blocknr;
/* the super has an extra ref to root->node */
tree_block_release(root, root->node);
@@ -666,7 +678,7 @@ static int insert_new_root(struct ctree_root *root,
* returns zero on success and < 0 on any error
*/
static int insert_ptr(struct ctree_root *root,
- struct ctree_path *path, struct key *key,
+ struct ctree_path *path, struct btrfs_disk_key *key,
u64 blocknr, int slot, int level)
{
struct node *lower;
@@ -681,11 +693,11 @@ static int insert_ptr(struct ctree_root *root,
BUG();
if (slot != nritems) {
memmove(lower->keys + slot + 1, lower->keys + slot,
- (nritems - slot) * sizeof(struct key));
+ (nritems - slot) * sizeof(struct btrfs_disk_key));
memmove(lower->blockptrs + slot + 1, lower->blockptrs + slot,
(nritems - slot) * sizeof(u64));
}
- memcpy(lower->keys + slot, key, sizeof(struct key));
+ memcpy(lower->keys + slot, key, sizeof(struct btrfs_disk_key));
lower->blockptrs[slot] = blocknr;
btrfs_set_header_nritems(&lower->header, nritems + 1);
if (lower->keys[1].objectid == 0)
@@ -732,7 +744,7 @@ static int split_node(struct ctree_root *root, struct ctree_path *path,
btrfs_header_parentid(&root->node->node.header));
mid = (c_nritems + 1) / 2;
memcpy(split->keys, c->keys + mid,
- (c_nritems - mid) * sizeof(struct key));
+ (c_nritems - mid) * sizeof(struct btrfs_disk_key));
memcpy(split->blockptrs, c->blockptrs + mid,
(c_nritems - mid) * sizeof(u64));
btrfs_set_header_nritems(&split->header, c_nritems - mid);
@@ -869,7 +881,7 @@ static int push_leaf_right(struct ctree_root *root, struct ctree_path *path,
BUG_ON(list_empty(&left_buf->dirty));
BUG_ON(list_empty(&right_buf->dirty));
memcpy(upper->node.keys + slot + 1,
- &right->items[0].key, sizeof(struct key));
+ &right->items[0].key, sizeof(struct btrfs_disk_key));
BUG_ON(list_empty(&upper->dirty));
/* then fixup the leaf pointer in the path */
@@ -1090,7 +1102,7 @@ static int split_leaf(struct ctree_root *root, struct ctree_path *path,
* Given a key and some data, insert an item into the tree.
* This does all the path init required, making room in the tree if needed.
*/
-int insert_item(struct ctree_root *root, struct key *key,
+int insert_item(struct ctree_root *root, struct btrfs_key *cpu_key,
void *data, int data_size)
{
int ret = 0;
@@ -1101,12 +1113,15 @@ int insert_item(struct ctree_root *root, struct key *key,
u32 nritems;
unsigned int data_end;
struct ctree_path path;
+ struct btrfs_disk_key disk_key;
+
+ btrfs_cpu_key_to_disk(&disk_key, cpu_key);
/* create a root if there isn't one */
if (!root->node)
BUG();
init_path(&path);
- ret = search_slot(root, key, &path, data_size, 1);
+ ret = search_slot(root, cpu_key, &path, data_size, 1);
if (ret == 0) {
release_path(root, &path);
return -EEXIST;
@@ -1148,7 +1163,8 @@ int insert_item(struct ctree_root *root, struct key *key,
data_end = old_data;
}
/* copy the new data in */
- memcpy(&leaf->items[slot].key, key, sizeof(struct key));
+ memcpy(&leaf->items[slot].key, &disk_key,
+ sizeof(struct btrfs_disk_key));
leaf->items[slot].offset = data_end - data_size;
leaf->items[slot].size = data_size;
memcpy(leaf->data + data_end - data_size, data, data_size);
@@ -1156,7 +1172,7 @@ int insert_item(struct ctree_root *root, struct key *key,
ret = 0;
if (slot == 0)
- ret = fixup_low_keys(root, &path, key, 1);
+ ret = fixup_low_keys(root, &path, &disk_key, 1);
BUG_ON(list_empty(&leaf_buf->dirty));
if (leaf_free_space(leaf) < 0)
@@ -1187,7 +1203,7 @@ static int del_ptr(struct ctree_root *root, struct ctree_path *path, int level,
nritems = btrfs_header_nritems(&node->header);
if (slot != nritems -1) {
memmove(node->keys + slot, node->keys + slot + 1,
- sizeof(struct key) * (nritems - slot - 1));
+ sizeof(struct btrfs_disk_key) * (nritems - slot - 1));
memmove(node->blockptrs + slot,
node->blockptrs + slot + 1,
sizeof(u64) * (nritems - slot - 1));
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 17:21:15 +0000