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btrfs-progs
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rename funcs and structs to btrfs

master
Chris Mason 2007-03-13 10:46:10 -04:00 committed by David Woodhouse
parent 56042e6ad4
commit aa60202f13
11 changed files with 454 additions and 447 deletions
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317
ctree.c
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@ -6,47 +6,47 @@
#include "disk-io.h"
#include "print-tree.h"
static int split_node(struct ctree_root *root, struct ctree_path *path,
static int split_node(struct btrfs_root *root, struct btrfs_path *path,
int level);
static int split_leaf(struct ctree_root *root, struct ctree_path *path,
static int split_leaf(struct btrfs_root *root, struct btrfs_path *path,
int data_size);
static int push_node_left(struct ctree_root *root, struct tree_buffer *dst,
struct tree_buffer *src);
static int balance_node_right(struct ctree_root *root,
struct tree_buffer *dst_buf,
struct tree_buffer *src_buf);
static int del_ptr(struct ctree_root *root, struct ctree_path *path, int level,
static int push_node_left(struct btrfs_root *root, struct btrfs_buffer *dst,
struct btrfs_buffer *src);
static int balance_node_right(struct btrfs_root *root,
struct btrfs_buffer *dst_buf,
struct btrfs_buffer *src_buf);
static int del_ptr(struct btrfs_root *root, struct btrfs_path *path, int level,
int slot);
inline void init_path(struct ctree_path *p)
inline void btrfs_init_path(struct btrfs_path *p)
{
memset(p, 0, sizeof(*p));
}
void release_path(struct ctree_root *root, struct ctree_path *p)
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p)
{
int i;
for (i = 0; i < MAX_LEVEL; i++) {
for (i = 0; i < BTRFS_MAX_LEVEL; i++) {
if (!p->nodes[i])
break;
tree_block_release(root, p->nodes[i]);
btrfs_block_release(root, p->nodes[i]);
}
memset(p, 0, sizeof(*p));
}
int btrfs_cow_block(struct ctree_root *root,
struct tree_buffer *buf,
struct tree_buffer *parent,
int btrfs_cow_block(struct btrfs_root *root,
struct btrfs_buffer *buf,
struct btrfs_buffer *parent,
int parent_slot,
struct tree_buffer **cow_ret)
struct btrfs_buffer **cow_ret)
{
struct tree_buffer *cow;
struct btrfs_buffer *cow;
if (!list_empty(&buf->dirty)) {
*cow_ret = buf;
return 0;
}
cow = alloc_free_block(root);
cow = btrfs_alloc_free_block(root);
memcpy(&cow->node, &buf->node, sizeof(buf->node));
btrfs_set_header_blocknr(&cow->node.header, cow->blocknr);
*cow_ret = cow;
@ -55,15 +55,15 @@ int btrfs_cow_block(struct ctree_root *root,
root->node = cow;
cow->count++;
if (buf != root->commit_root)
free_extent(root, buf->blocknr, 1);
tree_block_release(root, buf);
btrfs_free_extent(root, buf->blocknr, 1);
btrfs_block_release(root, buf);
} else {
btrfs_set_node_blockptr(&parent->node, parent_slot,
cow->blocknr);
BUG_ON(list_empty(&parent->dirty));
free_extent(root, buf->blocknr, 1);
btrfs_free_extent(root, buf->blocknr, 1);
}
tree_block_release(root, buf);
btrfs_block_release(root, buf);
return 0;
}
@ -72,7 +72,7 @@ int btrfs_cow_block(struct ctree_root *root,
* this returns the address of the start of the last item,
* which is the stop of the leaf data stack
*/
static inline unsigned int leaf_data_end(struct leaf *leaf)
static inline unsigned int leaf_data_end(struct btrfs_leaf *leaf)
{
u32 nr = btrfs_header_nritems(&leaf->header);
if (nr == 0)
@ -85,7 +85,7 @@ static inline unsigned int leaf_data_end(struct leaf *leaf)
* the start of the leaf data. IOW, how much room
* the leaf has left for both items and data
*/
int leaf_free_space(struct leaf *leaf)
int btrfs_leaf_free_space(struct btrfs_leaf *leaf)
{
int data_end = leaf_data_end(leaf);
int nritems = btrfs_header_nritems(&leaf->header);
@ -117,11 +117,11 @@ int comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2)
return 0;
}
int check_node(struct ctree_path *path, int level)
int check_node(struct btrfs_path *path, int level)
{
int i;
struct node *parent = NULL;
struct node *node = &path->nodes[level]->node;
struct btrfs_node *parent = NULL;
struct btrfs_node *node = &path->nodes[level]->node;
int parent_slot;
u32 nritems = btrfs_header_nritems(&node->header);
@ -146,18 +146,18 @@ int check_node(struct ctree_path *path, int level)
return 0;
}
int check_leaf(struct ctree_path *path, int level)
int check_leaf(struct btrfs_path *path, int level)
{
int i;
struct leaf *leaf = &path->nodes[level]->leaf;
struct node *parent = NULL;
struct btrfs_leaf *leaf = &path->nodes[level]->leaf;
struct btrfs_node *parent = NULL;
int parent_slot;
u32 nritems = btrfs_header_nritems(&leaf->header);
if (path->nodes[level + 1])
parent = &path->nodes[level + 1]->node;
parent_slot = path->slots[level + 1];
BUG_ON(leaf_free_space(leaf) < 0);
BUG_ON(btrfs_leaf_free_space(leaf) < 0);
if (nritems == 0)
return 0;
@ -186,7 +186,7 @@ int check_leaf(struct ctree_path *path, int level)
return 0;
}
int check_block(struct ctree_path *path, int level)
int check_block(struct btrfs_path *path, int level)
{
if (level == 0)
return check_leaf(path, level);
@ -233,10 +233,10 @@ int generic_bin_search(char *p, int item_size, struct btrfs_key *key,
* simple bin_search frontend that does the right thing for
* leaves vs nodes
*/
int bin_search(struct node *c, struct btrfs_key *key, int *slot)
int bin_search(struct btrfs_node *c, struct btrfs_key *key, int *slot)
{
if (btrfs_is_leaf(c)) {
struct leaf *l = (struct leaf *)c;
struct btrfs_leaf *l = (struct btrfs_leaf *)c;
return generic_bin_search((void *)l->items,
sizeof(struct btrfs_item),
key, btrfs_header_nritems(&c->header),
@ -250,11 +250,11 @@ int bin_search(struct node *c, struct btrfs_key *key, int *slot)
return -1;
}
struct tree_buffer *read_node_slot(struct ctree_root *root,
struct tree_buffer *parent_buf,
struct btrfs_buffer *read_node_slot(struct btrfs_root *root,
struct btrfs_buffer *parent_buf,
int slot)
{
struct node *node = &parent_buf->node;
struct btrfs_node *node = &parent_buf->node;
if (slot < 0)
return NULL;
if (slot >= btrfs_header_nritems(&node->header))
@ -262,17 +262,17 @@ struct tree_buffer *read_node_slot(struct ctree_root *root,
return read_tree_block(root, btrfs_node_blockptr(node, slot));
}
static int balance_level(struct ctree_root *root, struct ctree_path *path,
static int balance_level(struct btrfs_root *root, struct btrfs_path *path,
int level)
{
struct tree_buffer *right_buf;
struct tree_buffer *mid_buf;
struct tree_buffer *left_buf;
struct tree_buffer *parent_buf = NULL;
struct node *right = NULL;
struct node *mid;
struct node *left = NULL;
struct node *parent = NULL;
struct btrfs_buffer *right_buf;
struct btrfs_buffer *mid_buf;
struct btrfs_buffer *left_buf;
struct btrfs_buffer *parent_buf = NULL;
struct btrfs_node *right = NULL;
struct btrfs_node *mid;
struct btrfs_node *left = NULL;
struct btrfs_node *parent = NULL;
int ret = 0;
int wret;
int pslot;
@ -286,12 +286,12 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
mid = &mid_buf->node;
orig_ptr = btrfs_node_blockptr(mid, orig_slot);
if (level < MAX_LEVEL - 1)
if (level < BTRFS_MAX_LEVEL - 1)
parent_buf = path->nodes[level + 1];
pslot = path->slots[level + 1];
if (!parent_buf) {
struct tree_buffer *child;
struct btrfs_buffer *child;
u64 blocknr = mid_buf->blocknr;
if (btrfs_header_nritems(&mid->header) != 1)
@ -303,11 +303,11 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
root->node = child;
path->nodes[level] = NULL;
/* once for the path */
tree_block_release(root, mid_buf);
btrfs_block_release(root, mid_buf);
/* once for the root ptr */
tree_block_release(root, mid_buf);
btrfs_block_release(root, mid_buf);
clean_tree_block(root, mid_buf);
return free_extent(root, blocknr, 1);
return btrfs_free_extent(root, blocknr, 1);
}
parent = &parent_buf->node;
@ -340,14 +340,14 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
ret = wret;
if (btrfs_header_nritems(&right->header) == 0) {
u64 blocknr = right_buf->blocknr;
tree_block_release(root, right_buf);
btrfs_block_release(root, right_buf);
clean_tree_block(root, right_buf);
right_buf = NULL;
right = NULL;
wret = del_ptr(root, path, level + 1, pslot + 1);
if (wret)
ret = wret;
wret = free_extent(root, blocknr, 1);
wret = btrfs_free_extent(root, blocknr, 1);
if (wret)
ret = wret;
} else {
@ -375,14 +375,14 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
if (btrfs_header_nritems(&mid->header) == 0) {
/* we've managed to empty the middle node, drop it */
u64 blocknr = mid_buf->blocknr;
tree_block_release(root, mid_buf);
btrfs_block_release(root, mid_buf);
clean_tree_block(root, mid_buf);
mid_buf = NULL;
mid = NULL;
wret = del_ptr(root, path, level + 1, pslot);
if (wret)
ret = wret;
wret = free_extent(root, blocknr, 1);
wret = btrfs_free_extent(root, blocknr, 1);
if (wret)
ret = wret;
} else {
@ -400,7 +400,7 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
path->slots[level + 1] -= 1;
path->slots[level] = orig_slot;
if (mid_buf)
tree_block_release(root, mid_buf);
btrfs_block_release(root, mid_buf);
} else {
orig_slot -= btrfs_header_nritems(&left->header);
path->slots[level] = orig_slot;
@ -413,9 +413,9 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
BUG();
if (right_buf)
tree_block_release(root, right_buf);
btrfs_block_release(root, right_buf);
if (left_buf)
tree_block_release(root, left_buf);
btrfs_block_release(root, left_buf);
return ret;
}
@ -432,12 +432,12 @@ 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 btrfs_key *key,
struct ctree_path *p, int ins_len, int cow)
int btrfs_search_slot(struct btrfs_root *root, struct btrfs_key *key,
struct btrfs_path *p, int ins_len, int cow)
{
struct tree_buffer *b;
struct tree_buffer *cow_buf;
struct node *c;
struct btrfs_buffer *b;
struct btrfs_buffer *cow_buf;
struct btrfs_node *c;
int slot;
int ret;
int level;
@ -486,9 +486,9 @@ again:
}
b = read_tree_block(root, btrfs_node_blockptr(c, slot));
} else {
struct leaf *l = (struct leaf *)c;
struct btrfs_leaf *l = (struct btrfs_leaf *)c;
p->slots[level] = slot;
if (ins_len > 0 && leaf_free_space(l) <
if (ins_len > 0 && btrfs_leaf_free_space(l) <
sizeof(struct btrfs_item) + ins_len) {
int sret = split_leaf(root, p, ins_len);
BUG_ON(sret > 0);
@ -513,14 +513,14 @@ again:
* If this fails to write a tree block, it returns -1, but continues
* 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 btrfs_disk_key *key,
static int fixup_low_keys(struct btrfs_root *root,
struct btrfs_path *path, struct btrfs_disk_key *key,
int level)
{
int i;
int ret = 0;
for (i = level; i < MAX_LEVEL; i++) {
struct node *t;
for (i = level; i < BTRFS_MAX_LEVEL; i++) {
struct btrfs_node *t;
int tslot = path->slots[i];
if (!path->nodes[i])
break;
@ -540,11 +540,11 @@ static int fixup_low_keys(struct ctree_root *root,
* returns 0 if some ptrs were pushed left, < 0 if there was some horrible
* error, and > 0 if there was no room in the left hand block.
*/
static int push_node_left(struct ctree_root *root, struct tree_buffer *dst_buf,
struct tree_buffer *src_buf)
static int push_node_left(struct btrfs_root *root, struct btrfs_buffer *dst_buf,
struct btrfs_buffer *src_buf)
{
struct node *src = &src_buf->node;
struct node *dst = &dst_buf->node;
struct btrfs_node *src = &src_buf->node;
struct btrfs_node *dst = &dst_buf->node;
int push_items = 0;
int src_nritems;
int dst_nritems;
@ -587,12 +587,12 @@ static int push_node_left(struct ctree_root *root, struct tree_buffer *dst_buf,
*
* this will only push up to 1/2 the contents of the left node over
*/
static int balance_node_right(struct ctree_root *root,
struct tree_buffer *dst_buf,
struct tree_buffer *src_buf)
static int balance_node_right(struct btrfs_root *root,
struct btrfs_buffer *dst_buf,
struct btrfs_buffer *src_buf)
{
struct node *src = &src_buf->node;
struct node *dst = &dst_buf->node;
struct btrfs_node *src = &src_buf->node;
struct btrfs_node *dst = &dst_buf->node;
int push_items = 0;
int max_push;
int src_nritems;
@ -637,18 +637,18 @@ static int balance_node_right(struct ctree_root *root,
*
* returns zero on success or < 0 on failure.
*/
static int insert_new_root(struct ctree_root *root,
struct ctree_path *path, int level)
static int insert_new_root(struct btrfs_root *root,
struct btrfs_path *path, int level)
{
struct tree_buffer *t;
struct node *lower;
struct node *c;
struct btrfs_buffer *t;
struct btrfs_node *lower;
struct btrfs_node *c;
struct btrfs_disk_key *lower_key;
BUG_ON(path->nodes[level]);
BUG_ON(path->nodes[level-1] != root->node);
t = alloc_free_block(root);
t = btrfs_alloc_free_block(root);
c = &t->node;
memset(c, 0, sizeof(c));
btrfs_set_header_nritems(&c->header, 1);
@ -658,13 +658,13 @@ static int insert_new_root(struct ctree_root *root,
btrfs_header_parentid(&root->node->node.header));
lower = &path->nodes[level-1]->node;
if (btrfs_is_leaf(lower))
lower_key = &((struct leaf *)lower)->items[0].key;
lower_key = &((struct btrfs_leaf *)lower)->items[0].key;
else
lower_key = lower->keys;
memcpy(c->keys, lower_key, sizeof(struct btrfs_disk_key));
btrfs_set_node_blockptr(c, 0, path->nodes[level - 1]->blocknr);
/* the super has an extra ref to root->node */
tree_block_release(root, root->node);
btrfs_block_release(root, root->node);
root->node = t;
t->count++;
path->nodes[level] = t;
@ -681,11 +681,11 @@ 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 btrfs_disk_key *key,
static int insert_ptr(struct btrfs_root *root,
struct btrfs_path *path, struct btrfs_disk_key *key,
u64 blocknr, int slot, int level)
{
struct node *lower;
struct btrfs_node *lower;
int nritems;
BUG_ON(!path->nodes[level]);
@ -719,13 +719,13 @@ static int insert_ptr(struct ctree_root *root,
*
* returns 0 on success and < 0 on failure
*/
static int split_node(struct ctree_root *root, struct ctree_path *path,
static int split_node(struct btrfs_root *root, struct btrfs_path *path,
int level)
{
struct tree_buffer *t;
struct node *c;
struct tree_buffer *split_buffer;
struct node *split;
struct btrfs_buffer *t;
struct btrfs_node *c;
struct btrfs_buffer *split_buffer;
struct btrfs_node *split;
int mid;
int ret;
int wret;
@ -740,7 +740,7 @@ static int split_node(struct ctree_root *root, struct ctree_path *path,
return ret;
}
c_nritems = btrfs_header_nritems(&c->header);
split_buffer = alloc_free_block(root);
split_buffer = btrfs_alloc_free_block(root);
split = &split_buffer->node;
btrfs_set_header_flags(&split->header, btrfs_header_flags(&c->header));
btrfs_set_header_blocknr(&split->header, split_buffer->blocknr);
@ -763,11 +763,11 @@ static int split_node(struct ctree_root *root, struct ctree_path *path,
if (path->slots[level] >= mid) {
path->slots[level] -= mid;
tree_block_release(root, t);
btrfs_block_release(root, t);
path->nodes[level] = split_buffer;
path->slots[level + 1] += 1;
} else {
tree_block_release(root, split_buffer);
btrfs_block_release(root, split_buffer);
}
return ret;
}
@ -777,7 +777,7 @@ static int split_node(struct ctree_root *root, struct ctree_path *path,
* and nr indicate which items in the leaf to check. This totals up the
* space used both by the item structs and the item data
*/
static int leaf_space_used(struct leaf *l, int start, int nr)
static int leaf_space_used(struct btrfs_leaf *l, int start, int nr)
{
int data_len;
int end = start + nr - 1;
@ -797,14 +797,14 @@ static int leaf_space_used(struct leaf *l, int start, int nr)
* returns 1 if the push failed because the other node didn't have enough
* room, 0 if everything worked out and < 0 if there were major errors.
*/
static int push_leaf_right(struct ctree_root *root, struct ctree_path *path,
static int push_leaf_right(struct btrfs_root *root, struct btrfs_path *path,
int data_size)
{
struct tree_buffer *left_buf = path->nodes[0];
struct leaf *left = &left_buf->leaf;
struct leaf *right;
struct tree_buffer *right_buf;
struct tree_buffer *upper;
struct btrfs_buffer *left_buf = path->nodes[0];
struct btrfs_leaf *left = &left_buf->leaf;
struct btrfs_leaf *right;
struct btrfs_buffer *right_buf;
struct btrfs_buffer *upper;
int slot;
int i;
int free_space;
@ -825,17 +825,17 @@ static int push_leaf_right(struct ctree_root *root, struct ctree_path *path,
right_buf = read_tree_block(root, btrfs_node_blockptr(&upper->node,
slot + 1));
right = &right_buf->leaf;
free_space = leaf_free_space(right);
free_space = btrfs_leaf_free_space(right);
if (free_space < data_size + sizeof(struct btrfs_item)) {
tree_block_release(root, right_buf);
btrfs_block_release(root, right_buf);
return 1;
}
/* cow and double check */
btrfs_cow_block(root, right_buf, upper, slot + 1, &right_buf);
right = &right_buf->leaf;
free_space = leaf_free_space(right);
free_space = btrfs_leaf_free_space(right);
if (free_space < data_size + sizeof(struct btrfs_item)) {
tree_block_release(root, right_buf);
btrfs_block_release(root, right_buf);
return 1;
}
@ -851,7 +851,7 @@ static int push_leaf_right(struct ctree_root *root, struct ctree_path *path,
push_space += btrfs_item_size(item) + sizeof(*item);
}
if (push_items == 0) {
tree_block_release(root, right_buf);
btrfs_block_release(root, right_buf);
return 1;
}
right_nritems = btrfs_header_nritems(&right->header);
@ -893,11 +893,11 @@ static int push_leaf_right(struct ctree_root *root, struct ctree_path *path,
/* then fixup the leaf pointer in the path */
if (path->slots[0] >= left_nritems) {
path->slots[0] -= left_nritems;
tree_block_release(root, path->nodes[0]);
btrfs_block_release(root, path->nodes[0]);
path->nodes[0] = right_buf;
path->slots[1] += 1;
} else {
tree_block_release(root, right_buf);
btrfs_block_release(root, right_buf);
}
return 0;
}
@ -905,13 +905,13 @@ static int push_leaf_right(struct ctree_root *root, struct ctree_path *path,
* push some data in the path leaf to the left, trying to free up at
* least data_size bytes. returns zero if the push worked, nonzero otherwise
*/
static int push_leaf_left(struct ctree_root *root, struct ctree_path *path,
static int push_leaf_left(struct btrfs_root *root, struct btrfs_path *path,
int data_size)
{
struct tree_buffer *right_buf = path->nodes[0];
struct leaf *right = &right_buf->leaf;
struct tree_buffer *t;
struct leaf *left;
struct btrfs_buffer *right_buf = path->nodes[0];
struct btrfs_leaf *right = &right_buf->leaf;
struct btrfs_buffer *t;
struct btrfs_leaf *left;
int slot;
int i;
int free_space;
@ -932,18 +932,18 @@ static int push_leaf_left(struct ctree_root *root, struct ctree_path *path,
t = read_tree_block(root, btrfs_node_blockptr(&path->nodes[1]->node,
slot - 1));
left = &t->leaf;
free_space = leaf_free_space(left);
free_space = btrfs_leaf_free_space(left);
if (free_space < data_size + sizeof(struct btrfs_item)) {
tree_block_release(root, t);
btrfs_block_release(root, t);
return 1;
}
/* cow and double check */
btrfs_cow_block(root, t, path->nodes[1], slot - 1, &t);
left = &t->leaf;
free_space = leaf_free_space(left);
free_space = btrfs_leaf_free_space(left);
if (free_space < data_size + sizeof(struct btrfs_item)) {
tree_block_release(root, t);
btrfs_block_release(root, t);
return 1;
}
@ -958,7 +958,7 @@ static int push_leaf_left(struct ctree_root *root, struct ctree_path *path,
push_space += btrfs_item_size(item) + sizeof(*item);
}
if (push_items == 0) {
tree_block_release(root, t);
btrfs_block_release(root, t);
return 1;
}
/* push data from right to left */
@ -1009,11 +1009,11 @@ static int push_leaf_left(struct ctree_root *root, struct ctree_path *path,
/* then fixup the leaf pointer in the path */
if (path->slots[0] < push_items) {
path->slots[0] += old_left_nritems;
tree_block_release(root, path->nodes[0]);
btrfs_block_release(root, path->nodes[0]);
path->nodes[0] = t;
path->slots[1] -= 1;
} else {
tree_block_release(root, t);
btrfs_block_release(root, t);
path->slots[0] -= push_items;
}
BUG_ON(path->slots[0] < 0);
@ -1026,16 +1026,16 @@ static int push_leaf_left(struct ctree_root *root, struct ctree_path *path,
*
* returns 0 if all went well and < 0 on failure.
*/
static int split_leaf(struct ctree_root *root, struct ctree_path *path,
static int split_leaf(struct btrfs_root *root, struct btrfs_path *path,
int data_size)
{
struct tree_buffer *l_buf;
struct leaf *l;
struct btrfs_buffer *l_buf;
struct btrfs_leaf *l;
u32 nritems;
int mid;
int slot;
struct leaf *right;
struct tree_buffer *right_buffer;
struct btrfs_leaf *right;
struct btrfs_buffer *right_buffer;
int space_needed = data_size + sizeof(struct btrfs_item);
int data_copy_size;
int rt_data_off;
@ -1047,7 +1047,7 @@ static int split_leaf(struct ctree_root *root, struct ctree_path *path,
l = &l_buf->leaf;
/* did the pushes work? */
if (leaf_free_space(l) >= sizeof(struct btrfs_item) + data_size)
if (btrfs_leaf_free_space(l) >= sizeof(struct btrfs_item) + data_size)
return 0;
if (!path->nodes[1]) {
@ -1058,7 +1058,7 @@ static int split_leaf(struct ctree_root *root, struct ctree_path *path,
slot = path->slots[0];
nritems = btrfs_header_nritems(&l->header);
mid = (nritems + 1)/ 2;
right_buffer = alloc_free_block(root);
right_buffer = btrfs_alloc_free_block(root);
BUG_ON(!right_buffer);
BUG_ON(mid == nritems);
right = &right_buffer->leaf;
@ -1101,12 +1101,12 @@ static int split_leaf(struct ctree_root *root, struct ctree_path *path,
BUG_ON(list_empty(&l_buf->dirty));
BUG_ON(path->slots[0] != slot);
if (mid <= slot) {
tree_block_release(root, path->nodes[0]);
btrfs_block_release(root, path->nodes[0]);
path->nodes[0] = right_buffer;
path->slots[0] -= mid;
path->slots[1] += 1;
} else
tree_block_release(root, right_buffer);
btrfs_block_release(root, right_buffer);
BUG_ON(path->slots[0] < 0);
return ret;
}
@ -1115,17 +1115,17 @@ 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 btrfs_key *cpu_key,
int btrfs_insert_item(struct btrfs_root *root, struct btrfs_key *cpu_key,
void *data, int data_size)
{
int ret = 0;
int slot;
int slot_orig;
struct leaf *leaf;
struct tree_buffer *leaf_buf;
struct btrfs_leaf *leaf;
struct btrfs_buffer *leaf_buf;
u32 nritems;
unsigned int data_end;
struct ctree_path path;
struct btrfs_path path;
struct btrfs_disk_key disk_key;
btrfs_cpu_key_to_disk(&disk_key, cpu_key);
@ -1133,10 +1133,10 @@ int insert_item(struct ctree_root *root, struct btrfs_key *cpu_key,
/* create a root if there isn't one */
if (!root->node)
BUG();
init_path(&path);
ret = search_slot(root, cpu_key, &path, data_size, 1);
btrfs_init_path(&path);
ret = btrfs_search_slot(root, cpu_key, &path, data_size, 1);
if (ret == 0) {
release_path(root, &path);
btrfs_release_path(root, &path);
return -EEXIST;
}
if (ret < 0)
@ -1149,7 +1149,8 @@ int insert_item(struct ctree_root *root, struct btrfs_key *cpu_key,
nritems = btrfs_header_nritems(&leaf->header);
data_end = leaf_data_end(leaf);
if (leaf_free_space(leaf) < sizeof(struct btrfs_item) + data_size)
if (btrfs_leaf_free_space(leaf) <
sizeof(struct btrfs_item) + data_size)
BUG();
slot = path.slots[0];
@ -1190,11 +1191,11 @@ int insert_item(struct ctree_root *root, struct btrfs_key *cpu_key,
ret = fixup_low_keys(root, &path, &disk_key, 1);
BUG_ON(list_empty(&leaf_buf->dirty));
if (leaf_free_space(leaf) < 0)
if (btrfs_leaf_free_space(leaf) < 0)
BUG();
check_leaf(&path, 0);
out:
release_path(root, &path);
btrfs_release_path(root, &path);
return ret;
}
@ -1205,11 +1206,11 @@ out:
* continuing all the way the root if required. The root is converted into
* a leaf if all the nodes are emptied.
*/
static int del_ptr(struct ctree_root *root, struct ctree_path *path, int level,
static int del_ptr(struct btrfs_root *root, struct btrfs_path *path, int level,
int slot)
{
struct node *node;
struct tree_buffer *parent = path->nodes[level];
struct btrfs_node *node;
struct btrfs_buffer *parent = path->nodes[level];
u32 nritems;
int ret = 0;
int wret;
@ -1242,11 +1243,11 @@ static int del_ptr(struct ctree_root *root, struct ctree_path *path, int level,
* delete the item at the leaf level in path. If that empties
* the leaf, remove it from the tree
*/
int del_item(struct ctree_root *root, struct ctree_path *path)
int btrfs_del_item(struct btrfs_root *root, struct btrfs_path *path)
{
int slot;
struct leaf *leaf;
struct tree_buffer *leaf_buf;
struct btrfs_leaf *leaf;
struct btrfs_buffer *leaf_buf;
int doff;
int dsize;
int ret = 0;
@ -1286,7 +1287,7 @@ int del_item(struct ctree_root *root, struct ctree_path *path)
wret = del_ptr(root, path, 1, path->slots[1]);
if (wret)
ret = wret;
wret = free_extent(root, leaf_buf->blocknr, 1);
wret = btrfs_free_extent(root, leaf_buf->blocknr, 1);
if (wret)
ret = wret;
}
@ -1323,12 +1324,12 @@ int del_item(struct ctree_root *root, struct ctree_path *path)
wret = del_ptr(root, path, 1, slot);
if (wret)
ret = wret;
tree_block_release(root, leaf_buf);
wret = free_extent(root, blocknr, 1);
btrfs_block_release(root, leaf_buf);
wret = btrfs_free_extent(root, blocknr, 1);
if (wret)
ret = wret;
} else {
tree_block_release(root, leaf_buf);
btrfs_block_release(root, leaf_buf);
}
}
}
@ -1340,15 +1341,15 @@ int del_item(struct ctree_root *root, struct ctree_path *path)
* returns 0 if it found something or 1 if there are no greater leaves.
* returns < 0 on io errors.
*/
int next_leaf(struct ctree_root *root, struct ctree_path *path)
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path)
{
int slot;
int level = 1;
u64 blocknr;
struct tree_buffer *c;
struct tree_buffer *next = NULL;
struct btrfs_buffer *c;
struct btrfs_buffer *next = NULL;
while(level < MAX_LEVEL) {
while(level < BTRFS_MAX_LEVEL) {
if (!path->nodes[level])
return 1;
slot = path->slots[level] + 1;
@ -1359,7 +1360,7 @@ int next_leaf(struct ctree_root *root, struct ctree_path *path)
}
blocknr = btrfs_node_blockptr(&c->node, slot);
if (next)
tree_block_release(root, next);
btrfs_block_release(root, next);
next = read_tree_block(root, blocknr);
break;
}
@ -1367,7 +1368,7 @@ int next_leaf(struct ctree_root *root, struct ctree_path *path)
while(1) {
level--;
c = path->nodes[level];
tree_block_release(root, c);
btrfs_block_release(root, c);
path->nodes[level] = next;
path->slots[level] = 0;
if (!level)

95
ctree.h
View File

@ -1,10 +1,10 @@
#ifndef __CTREE__
#define __CTREE__
#ifndef __BTRFS__
#define __BTRFS__
#include "list.h"
#include "kerncompat.h"
#define CTREE_BLOCKSIZE 1024
#define BTRFS_BLOCKSIZE 1024
/*
* the key defines the order in the tree, and so it also defines (optimal)
@ -46,21 +46,21 @@ struct btrfs_header {
/* generation flags to be added */
} __attribute__ ((__packed__));
#define MAX_LEVEL 8
#define NODEPTRS_PER_BLOCK ((CTREE_BLOCKSIZE - sizeof(struct btrfs_header)) / \
#define BTRFS_MAX_LEVEL 8
#define NODEPTRS_PER_BLOCK ((BTRFS_BLOCKSIZE - sizeof(struct btrfs_header)) / \
(sizeof(struct btrfs_disk_key) + sizeof(u64)))
struct tree_buffer;
struct btrfs_buffer;
/*
* in ram representation of the tree. extent_root is used for all allocations
* and for the extent tree extent_root root. current_insert is used
* only for the extent tree.
*/
struct ctree_root {
struct tree_buffer *node;
struct tree_buffer *commit_root;
struct ctree_root *extent_root;
struct btrfs_root {
struct btrfs_buffer *node;
struct btrfs_buffer *commit_root;
struct btrfs_root *extent_root;
struct btrfs_key current_insert;
struct btrfs_key last_insert;
int fp;
@ -74,7 +74,7 @@ struct ctree_root {
/*
* describes a tree on disk
*/
struct ctree_root_info {
struct btrfs_root_info {
u64 fsid[2]; /* FS specific uuid */
u64 blocknr; /* blocknr of this block */
u64 objectid; /* inode number of this root */
@ -88,9 +88,9 @@ struct ctree_root_info {
* the super block basically lists the main trees of the FS
* it currently lacks any block count etc etc
*/
struct ctree_super_block {
struct ctree_root_info root_info;
struct ctree_root_info extent_info;
struct btrfs_super_block {
struct btrfs_root_info root_info;
struct btrfs_root_info extent_info;
} __attribute__ ((__packed__));
/*
@ -111,13 +111,13 @@ struct btrfs_item {
* The data is separate from the items to get the keys closer together
* during searches.
*/
#define LEAF_DATA_SIZE (CTREE_BLOCKSIZE - sizeof(struct btrfs_header))
struct leaf {
#define LEAF_DATA_SIZE (BTRFS_BLOCKSIZE - sizeof(struct btrfs_header))
struct btrfs_leaf {
struct btrfs_header header;
union {
struct btrfs_item items[LEAF_DATA_SIZE/
sizeof(struct btrfs_item)];
u8 data[CTREE_BLOCKSIZE-sizeof(struct btrfs_header)];
u8 data[BTRFS_BLOCKSIZE - sizeof(struct btrfs_header)];
};
} __attribute__ ((__packed__));
@ -125,7 +125,7 @@ struct leaf {
* all non-leaf blocks are nodes, they hold only keys and pointers to
* other blocks
*/
struct node {
struct btrfs_node {
struct btrfs_header header;
struct btrfs_disk_key keys[NODEPTRS_PER_BLOCK];
__le64 blockptrs[NODEPTRS_PER_BLOCK];
@ -135,50 +135,51 @@ struct node {
* items in the extent btree are used to record the objectid of the
* owner of the block and the number of references
*/
struct extent_item {
struct btrfs_extent_item {
__le32 refs;
__le64 owner;
} __attribute__ ((__packed__));
/*
* ctree_paths remember the path taken from the root down to the leaf.
* level 0 is always the leaf, and nodes[1...MAX_LEVEL] will point
* btrfs_paths remember the path taken from the root down to the leaf.
* level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
* to any other levels that are present.
*
* The slots array records the index of the item or block pointer
* used while walking the tree.
*/
struct ctree_path {
struct tree_buffer *nodes[MAX_LEVEL];
int slots[MAX_LEVEL];
struct btrfs_path {
struct btrfs_buffer *nodes[BTRFS_MAX_LEVEL];
int slots[BTRFS_MAX_LEVEL];
};
static inline u64 btrfs_extent_owner(struct extent_item *ei)
static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei)
{
return le64_to_cpu(ei->owner);
}
static inline void btrfs_set_extent_owner(struct extent_item *ei, u64 val)
static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val)
{
ei->owner = cpu_to_le64(val);
}
static inline u32 btrfs_extent_refs(struct extent_item *ei)
static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei)
{
return le32_to_cpu(ei->refs);
}
static inline void btrfs_set_extent_refs(struct extent_item *ei, u32 val)
static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val)
{
ei->refs = cpu_to_le32(val);
}
static inline u64 btrfs_node_blockptr(struct node *n, int nr)
static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr)
{
return le64_to_cpu(n->blockptrs[nr]);
}
static inline void btrfs_set_node_blockptr(struct node *n, int nr, u64 val)
static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr,
u64 val)
{
n->blockptrs[nr] = cpu_to_le64(val);
}
@ -300,34 +301,34 @@ static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val)
static inline int btrfs_header_level(struct btrfs_header *h)
{
return btrfs_header_flags(h) & (MAX_LEVEL - 1);
return btrfs_header_flags(h) & (BTRFS_MAX_LEVEL - 1);
}
static inline void btrfs_set_header_level(struct btrfs_header *h, int level)
{
u16 flags;
BUG_ON(level > MAX_LEVEL);
flags = btrfs_header_flags(h) & ~(MAX_LEVEL - 1);
BUG_ON(level > BTRFS_MAX_LEVEL);
flags = btrfs_header_flags(h) & ~(BTRFS_MAX_LEVEL - 1);
btrfs_set_header_flags(h, flags | level);
}
static inline int btrfs_is_leaf(struct node *n)
static inline int btrfs_is_leaf(struct btrfs_node *n)
{
return (btrfs_header_level(&n->header) == 0);
}
struct tree_buffer *alloc_free_block(struct ctree_root *root);
int btrfs_inc_ref(struct ctree_root *root, struct tree_buffer *buf);
int free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks);
int search_slot(struct ctree_root *root, struct btrfs_key *key,
struct ctree_path *p, int ins_len, int cow);
void release_path(struct ctree_root *root, struct ctree_path *p);
void init_path(struct ctree_path *p);
int del_item(struct ctree_root *root, struct ctree_path *path);
int insert_item(struct ctree_root *root, struct btrfs_key *key,
struct btrfs_buffer *btrfs_alloc_free_block(struct btrfs_root *root);
int btrfs_inc_ref(struct btrfs_root *root, struct btrfs_buffer *buf);
int btrfs_free_extent(struct btrfs_root *root, u64 blocknr, u64 num_blocks);
int btrfs_search_slot(struct btrfs_root *root, struct btrfs_key *key,
struct btrfs_path *p, int ins_len, int cow);
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
void btrfs_init_path(struct btrfs_path *p);
int btrfs_del_item(struct btrfs_root *root, struct btrfs_path *path);
int btrfs_insert_item(struct btrfs_root *root, struct btrfs_key *key,
void *data, int data_size);
int next_leaf(struct ctree_root *root, struct ctree_path *path);
int leaf_free_space(struct leaf *leaf);
int btrfs_drop_snapshot(struct ctree_root *root, struct tree_buffer *snap);
int btrfs_finish_extent_commit(struct ctree_root *root);
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
int btrfs_leaf_free_space(struct btrfs_leaf *leaf);
int btrfs_drop_snapshot(struct btrfs_root *root, struct btrfs_buffer *snap);
int btrfs_finish_extent_commit(struct btrfs_root *root);
#endif

8
debug-tree.c
View File

@ -7,13 +7,13 @@
#include "print-tree.h"
int main(int ac, char **av) {
struct ctree_super_block super;
struct ctree_root *root;
struct btrfs_super_block super;
struct btrfs_root *root;
radix_tree_init();
root = open_ctree("dbfile", &super);
printf("root tree\n");
print_tree(root, root->node);
btrfs_print_tree(root, root->node);
printf("map tree\n");
print_tree(root->extent_root, root->extent_root->node);
btrfs_print_tree(root->extent_root, root->extent_root->node);
return 0;
}

106
disk-io.c
View File

@ -13,7 +13,7 @@
static int allocated_blocks = 0;
int cache_max = 10000;
static int check_tree_block(struct ctree_root *root, struct tree_buffer *buf)
static int check_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf)
{
if (buf->blocknr != btrfs_header_blocknr(&buf->node.header))
BUG();
@ -23,18 +23,18 @@ static int check_tree_block(struct ctree_root *root, struct tree_buffer *buf)
return 0;
}
static int free_some_buffers(struct ctree_root *root)
static int free_some_buffers(struct btrfs_root *root)
{
struct list_head *node, *next;
struct tree_buffer *b;
struct btrfs_buffer *b;
if (root->cache_size < cache_max)
return 0;
list_for_each_safe(node, next, &root->cache) {
b = list_entry(node, struct tree_buffer, cache);
b = list_entry(node, struct btrfs_buffer, cache);
if (b->count == 1) {
BUG_ON(!list_empty(&b->dirty));
list_del_init(&b->cache);
tree_block_release(root, b);
btrfs_block_release(root, b);
if (root->cache_size < cache_max)
break;
}
@ -42,11 +42,11 @@ static int free_some_buffers(struct ctree_root *root)
return 0;
}
struct tree_buffer *alloc_tree_block(struct ctree_root *root, u64 blocknr)
struct btrfs_buffer *alloc_tree_block(struct btrfs_root *root, u64 blocknr)
{
struct tree_buffer *buf;
struct btrfs_buffer *buf;
int ret;
buf = malloc(sizeof(struct tree_buffer));
buf = malloc(sizeof(struct btrfs_buffer));
if (!buf)
return buf;
allocated_blocks++;
@ -66,9 +66,9 @@ struct tree_buffer *alloc_tree_block(struct ctree_root *root, u64 blocknr)
return buf;
}
struct tree_buffer *find_tree_block(struct ctree_root *root, u64 blocknr)
struct btrfs_buffer *find_tree_block(struct btrfs_root *root, u64 blocknr)
{
struct tree_buffer *buf;
struct btrfs_buffer *buf;
buf = radix_tree_lookup(&root->cache_radix, blocknr);
if (buf) {
buf->count++;
@ -82,10 +82,10 @@ struct tree_buffer *find_tree_block(struct ctree_root *root, u64 blocknr)
return buf;
}
struct tree_buffer *read_tree_block(struct ctree_root *root, u64 blocknr)
struct btrfs_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr)
{
loff_t offset = blocknr * CTREE_BLOCKSIZE;
struct tree_buffer *buf;
loff_t offset = blocknr * BTRFS_BLOCKSIZE;
struct btrfs_buffer *buf;
int ret;
buf = radix_tree_lookup(&root->cache_radix, blocknr);
@ -95,8 +95,8 @@ struct tree_buffer *read_tree_block(struct ctree_root *root, u64 blocknr)
buf = alloc_tree_block(root, blocknr);
if (!buf)
return NULL;
ret = pread(root->fp, &buf->node, CTREE_BLOCKSIZE, offset);
if (ret != CTREE_BLOCKSIZE) {
ret = pread(root->fp, &buf->node, BTRFS_BLOCKSIZE, offset);
if (ret != BTRFS_BLOCKSIZE) {
free(buf);
return NULL;
}
@ -106,7 +106,7 @@ struct tree_buffer *read_tree_block(struct ctree_root *root, u64 blocknr)
return buf;
}
int dirty_tree_block(struct ctree_root *root, struct tree_buffer *buf)
int dirty_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf)
{
if (!list_empty(&buf->dirty))
return 0;
@ -115,46 +115,47 @@ int dirty_tree_block(struct ctree_root *root, struct tree_buffer *buf)
return 0;
}
int clean_tree_block(struct ctree_root *root, struct tree_buffer *buf)
int clean_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf)
{
if (!list_empty(&buf->dirty)) {
list_del_init(&buf->dirty);
tree_block_release(root, buf);
btrfs_block_release(root, buf);
}
return 0;
}
int write_tree_block(struct ctree_root *root, struct tree_buffer *buf)
int write_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf)
{
u64 blocknr = buf->blocknr;
loff_t offset = blocknr * CTREE_BLOCKSIZE;
loff_t offset = blocknr * BTRFS_BLOCKSIZE;
int ret;
if (buf->blocknr != btrfs_header_blocknr(&buf->node.header))
BUG();
ret = pwrite(root->fp, &buf->node, CTREE_BLOCKSIZE, offset);
if (ret != CTREE_BLOCKSIZE)
ret = pwrite(root->fp, &buf->node, BTRFS_BLOCKSIZE, offset);
if (ret != BTRFS_BLOCKSIZE)
return ret;
return 0;
}
static int __commit_transaction(struct ctree_root *root)
static int __commit_transaction(struct btrfs_root *root)
{
struct tree_buffer *b;
struct btrfs_buffer *b;
int ret = 0;
int wret;
while(!list_empty(&root->trans)) {
b = list_entry(root->trans.next, struct tree_buffer, dirty);
b = list_entry(root->trans.next, struct btrfs_buffer, dirty);
list_del_init(&b->dirty);
wret = write_tree_block(root, b);
if (wret)
ret = wret;
tree_block_release(root, b);
btrfs_block_release(root, b);
}
return ret;
}
int commit_transaction(struct ctree_root *root, struct ctree_super_block *s)
int btrfs_commit_transaction(struct btrfs_root *root,
struct btrfs_super_block *s)
{
int ret = 0;
@ -163,20 +164,20 @@ int commit_transaction(struct ctree_root *root, struct ctree_super_block *s)
ret = __commit_transaction(root->extent_root);
BUG_ON(ret);
if (root->commit_root != root->node) {
struct tree_buffer *snap = root->commit_root;
struct btrfs_buffer *snap = root->commit_root;
root->commit_root = root->node;
root->node->count++;
ret = btrfs_drop_snapshot(root, snap);
BUG_ON(ret);
// tree_block_release(root, snap);
// btrfs_block_release(root, snap);
}
write_ctree_super(root, s);
btrfs_finish_extent_commit(root);
return ret;
}
static int __setup_root(struct ctree_root *root, struct ctree_root *extent_root,
struct ctree_root_info *info, int fp)
static int __setup_root(struct btrfs_root *root, struct btrfs_root *extent_root,
struct btrfs_root_info *info, int fp)
{
INIT_LIST_HEAD(&root->trans);
INIT_LIST_HEAD(&root->cache);
@ -191,10 +192,10 @@ static int __setup_root(struct ctree_root *root, struct ctree_root *extent_root,
return 0;
}
struct ctree_root *open_ctree(char *filename, struct ctree_super_block *super)
struct btrfs_root *open_ctree(char *filename, struct btrfs_super_block *super)
{
struct ctree_root *root = malloc(sizeof(struct ctree_root));
struct ctree_root *extent_root = malloc(sizeof(struct ctree_root));
struct btrfs_root *root = malloc(sizeof(struct btrfs_root));
struct btrfs_root *extent_root = malloc(sizeof(struct btrfs_root));
int fp;
int ret;
@ -207,16 +208,16 @@ struct ctree_root *open_ctree(char *filename, struct ctree_super_block *super)
INIT_RADIX_TREE(&root->pinned_radix, GFP_KERNEL);
INIT_RADIX_TREE(&extent_root->pinned_radix, GFP_KERNEL);
INIT_RADIX_TREE(&extent_root->cache_radix, GFP_KERNEL);
ret = pread(fp, super, sizeof(struct ctree_super_block),
CTREE_SUPER_INFO_OFFSET(CTREE_BLOCKSIZE));
ret = pread(fp, super, sizeof(struct btrfs_super_block),
BTRFS_SUPER_INFO_OFFSET(BTRFS_BLOCKSIZE));
if (ret == 0 || super->root_info.tree_root == 0) {
printf("making new FS!\n");
ret = mkfs(fp);
if (ret)
return NULL;
ret = pread(fp, super, sizeof(struct ctree_super_block),
CTREE_SUPER_INFO_OFFSET(CTREE_BLOCKSIZE));
if (ret != sizeof(struct ctree_super_block))
ret = pread(fp, super, sizeof(struct btrfs_super_block),
BTRFS_SUPER_INFO_OFFSET(BTRFS_BLOCKSIZE));
if (ret != sizeof(struct btrfs_super_block))
return NULL;
}
BUG_ON(ret < 0);
@ -227,18 +228,19 @@ struct ctree_root *open_ctree(char *filename, struct ctree_super_block *super)
return root;
}
static int __update_root(struct ctree_root *root, struct ctree_root_info *info)
static int __update_root(struct btrfs_root *root, struct btrfs_root_info *info)
{
info->tree_root = root->node->blocknr;
return 0;
}
int write_ctree_super(struct ctree_root *root, struct ctree_super_block *s)
int write_ctree_super(struct btrfs_root *root, struct btrfs_super_block *s)
{
int ret;
__update_root(root, &s->root_info);
__update_root(root->extent_root, &s->extent_info);
ret = pwrite(root->fp, s, sizeof(*s), CTREE_SUPER_INFO_OFFSET(CTREE_BLOCKSIZE));
ret = pwrite(root->fp, s, sizeof(*s),
BTRFS_SUPER_INFO_OFFSET(BTRFS_BLOCKSIZE));
if (ret != sizeof(*s)) {
fprintf(stderr, "failed to write new super block err %d\n", ret);
return ret;
@ -246,19 +248,19 @@ int write_ctree_super(struct ctree_root *root, struct ctree_super_block *s)
return 0;
}
static int drop_cache(struct ctree_root *root)
static int drop_cache(struct btrfs_root *root)
{
while(!list_empty(&root->cache)) {
struct tree_buffer *b = list_entry(root->cache.next,
struct tree_buffer, cache);
struct btrfs_buffer *b = list_entry(root->cache.next,
struct btrfs_buffer, cache);
list_del_init(&b->cache);
tree_block_release(root, b);
btrfs_block_release(root, b);
}
return 0;
}
int close_ctree(struct ctree_root *root, struct ctree_super_block *s)
int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s)
{
commit_transaction(root, s);
btrfs_commit_transaction(root, s);
__commit_transaction(root->extent_root);
write_ctree_super(root, s);
drop_cache(root->extent_root);
@ -268,16 +270,16 @@ int close_ctree(struct ctree_root *root, struct ctree_super_block *s)
close(root->fp);
if (root->node)
tree_block_release(root, root->node);
btrfs_block_release(root, root->node);
if (root->extent_root->node)
tree_block_release(root->extent_root, root->extent_root->node);
tree_block_release(root, root->commit_root);
btrfs_block_release(root->extent_root, root->extent_root->node);
btrfs_block_release(root, root->commit_root);
free(root);
printf("on close %d blocks are allocated\n", allocated_blocks);
return 0;
}
void tree_block_release(struct ctree_root *root, struct tree_buffer *buf)
void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *buf)
{
buf->count--;
if (buf->count < 0)

29
disk-io.h
View File

@ -2,29 +2,30 @@
#define __DISKIO__
#include "list.h"
struct tree_buffer {
struct btrfs_buffer {
u64 blocknr;
int count;
union {
struct node node;
struct leaf leaf;
struct btrfs_node node;
struct btrfs_leaf leaf;
};
struct list_head dirty;
struct list_head cache;
};
struct tree_buffer *read_tree_block(struct ctree_root *root, u64 blocknr);
struct tree_buffer *find_tree_block(struct ctree_root *root, u64 blocknr);
int write_tree_block(struct ctree_root *root, struct tree_buffer *buf);
int dirty_tree_block(struct ctree_root *root, struct tree_buffer *buf);
int clean_tree_block(struct ctree_root *root, struct tree_buffer *buf);
int commit_transaction(struct ctree_root *root, struct ctree_super_block *s);
struct ctree_root *open_ctree(char *filename, struct ctree_super_block *s);
int close_ctree(struct ctree_root *root, struct ctree_super_block *s);
void tree_block_release(struct ctree_root *root, struct tree_buffer *buf);
int write_ctree_super(struct ctree_root *root, struct ctree_super_block *s);
struct btrfs_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr);
struct btrfs_buffer *find_tree_block(struct btrfs_root *root, u64 blocknr);
int write_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf);
int dirty_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf);
int clean_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf);
int btrfs_commit_transaction(struct btrfs_root *root,
struct btrfs_super_block *s);
struct btrfs_root *open_ctree(char *filename, struct btrfs_super_block *s);
int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s);
void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *buf);
int write_ctree_super(struct btrfs_root *root, struct btrfs_super_block *s);
int mkfs(int fd);
#define CTREE_SUPER_INFO_OFFSET(bs) (16 * (bs))
#define BTRFS_SUPER_INFO_OFFSET(bs) (16 * (bs))
#endif

147
extent-tree.c
View File

@ -6,11 +6,11 @@
#include "disk-io.h"
#include "print-tree.h"
static int find_free_extent(struct ctree_root *orig_root, u64 num_blocks,
static int find_free_extent(struct btrfs_root *orig_root, u64 num_blocks,
u64 search_start, u64 search_end,
struct btrfs_key *ins);
static int finish_current_insert(struct ctree_root *extent_root);
static int run_pending(struct ctree_root *extent_root);
static int finish_current_insert(struct btrfs_root *extent_root);
static int run_pending(struct btrfs_root *extent_root);
/*
* pending extents are blocks that we're trying to allocate in the extent
@ -21,62 +21,63 @@ static int run_pending(struct ctree_root *extent_root);
*/
#define CTREE_EXTENT_PENDING_DEL 0
static int inc_block_ref(struct ctree_root *root, u64 blocknr)
static int inc_block_ref(struct btrfs_root *root, u64 blocknr)
{
struct ctree_path path;
struct btrfs_path path;
int ret;
struct btrfs_key key;
struct leaf *l;
struct extent_item *item;
struct btrfs_leaf *l;
struct btrfs_extent_item *item;
struct btrfs_key ins;
u32 refs;
find_free_extent(root->extent_root, 0, 0, (u64)-1, &ins);
init_path(&path);
btrfs_init_path(&path);
key.objectid = blocknr;
key.flags = 0;
key.offset = 1;
ret = search_slot(root->extent_root, &key, &path, 0, 1);
ret = btrfs_search_slot(root->extent_root, &key, &path, 0, 1);
if (ret != 0)
BUG();
BUG_ON(ret != 0);
l = &path.nodes[0]->leaf;
item = (struct extent_item *)(l->data + btrfs_item_offset(l->items +
path.slots[0]));
item = (struct btrfs_extent_item *)(l->data +
btrfs_item_offset(l->items +
path.slots[0]));
refs = btrfs_extent_refs(item);
btrfs_set_extent_refs(item, refs + 1);
BUG_ON(list_empty(&path.nodes[0]->dirty));
release_path(root->extent_root, &path);
btrfs_release_path(root->extent_root, &path);
finish_current_insert(root->extent_root);
run_pending(root->extent_root);
return 0;
}
static int lookup_block_ref(struct ctree_root *root, u64 blocknr, u32 *refs)
static int lookup_block_ref(struct btrfs_root *root, u64 blocknr, u32 *refs)
{
struct ctree_path path;
struct btrfs_path path;
int ret;
struct btrfs_key key;
struct leaf *l;
struct extent_item *item;
init_path(&path);
struct btrfs_leaf *l;
struct btrfs_extent_item *item;
btrfs_init_path(&path);
key.objectid = blocknr;
key.flags = 0;
key.offset = 1;
ret = search_slot(root->extent_root, &key, &path, 0, 0);
ret = btrfs_search_slot(root->extent_root, &key, &path, 0, 0);
if (ret != 0)
BUG();
l = &path.nodes[0]->leaf;
item = (struct extent_item *)(l->data +
item = (struct btrfs_extent_item *)(l->data +
btrfs_item_offset(l->items +
path.slots[0]));
*refs = btrfs_extent_refs(item);
release_path(root->extent_root, &path);
btrfs_release_path(root->extent_root, &path);
return 0;
}
int btrfs_inc_ref(struct ctree_root *root, struct tree_buffer *buf)
int btrfs_inc_ref(struct btrfs_root *root, struct btrfs_buffer *buf)
{
u64 blocknr;
int i;
@ -93,9 +94,9 @@ int btrfs_inc_ref(struct ctree_root *root, struct tree_buffer *buf)
return 0;
}
int btrfs_finish_extent_commit(struct ctree_root *root)
int btrfs_finish_extent_commit(struct btrfs_root *root)
{
struct ctree_root *extent_root = root->extent_root;
struct btrfs_root *extent_root = root->extent_root;
unsigned long gang[8];
int ret;
int i;
@ -115,10 +116,10 @@ int btrfs_finish_extent_commit(struct ctree_root *root)
return 0;
}
static int finish_current_insert(struct ctree_root *extent_root)
static int finish_current_insert(struct btrfs_root *extent_root)
{
struct btrfs_key ins;
struct extent_item extent_item;
struct btrfs_extent_item extent_item;
int i;
int ret;
@ -130,7 +131,7 @@ static int finish_current_insert(struct ctree_root *extent_root)
for (i = 0; i < extent_root->current_insert.flags; i++) {
ins.objectid = extent_root->current_insert.objectid + i;
ret = insert_item(extent_root, &ins, &extent_item,
ret = btrfs_insert_item(extent_root, &ins, &extent_item,
sizeof(extent_item));
BUG_ON(ret);
}
@ -141,14 +142,14 @@ static int finish_current_insert(struct ctree_root *extent_root)
/*
* remove an extent from the root, returns 0 on success
*/
int __free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks)
static int __free_extent(struct btrfs_root *root, u64 blocknr, u64 num_blocks)
{
struct ctree_path path;
struct btrfs_path path;
struct btrfs_key key;
struct ctree_root *extent_root = root->extent_root;
struct btrfs_root *extent_root = root->extent_root;
int ret;
struct btrfs_item *item;
struct extent_item *ei;
struct btrfs_extent_item *ei;
struct btrfs_key ins;
u32 refs;
@ -157,16 +158,16 @@ int __free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks)
key.offset = num_blocks;
find_free_extent(root, 0, 0, (u64)-1, &ins);
init_path(&path);
ret = search_slot(extent_root, &key, &path, -1, 1);
btrfs_init_path(&path);
ret = btrfs_search_slot(extent_root, &key, &path, -1, 1);
if (ret) {
printf("failed to find %Lu\n", key.objectid);
print_tree(extent_root, extent_root->node);
btrfs_print_tree(extent_root, extent_root->node);
printf("failed to find %Lu\n", key.objectid);
BUG();
}
item = path.nodes[0]->leaf.items + path.slots[0];
ei = (struct extent_item *)(path.nodes[0]->leaf.data +
ei = (struct btrfs_extent_item *)(path.nodes[0]->leaf.data +
btrfs_item_offset(item));
BUG_ON(ei->refs == 0);
refs = btrfs_extent_refs(ei) - 1;
@ -180,14 +181,14 @@ int __free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks)
BUG_ON(err);
radix_tree_preload_end();
}
ret = del_item(extent_root, &path);
ret = btrfs_del_item(extent_root, &path);
if (root != extent_root &&
extent_root->last_insert.objectid < blocknr)
extent_root->last_insert.objectid = blocknr;
if (ret)
BUG();
}
release_path(extent_root, &path);
btrfs_release_path(extent_root, &path);
finish_current_insert(extent_root);
return ret;
}
@ -196,10 +197,10 @@ int __free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks)
* find all the blocks marked as pending in the radix tree and remove
* them from the extent map
*/
static int del_pending_extents(struct ctree_root *extent_root)
static int del_pending_extents(struct btrfs_root *extent_root)
{
int ret;
struct tree_buffer *gang[4];
struct btrfs_buffer *gang[4];
int i;
while(1) {
@ -214,13 +215,13 @@ static int del_pending_extents(struct ctree_root *extent_root)
radix_tree_tag_clear(&extent_root->cache_radix,
gang[i]->blocknr,
CTREE_EXTENT_PENDING_DEL);
tree_block_release(extent_root, gang[i]);
btrfs_block_release(extent_root, gang[i]);
}
}
return 0;
}
static int run_pending(struct ctree_root *extent_root)
static int run_pending(struct btrfs_root *extent_root)
{
while(radix_tree_tagged(&extent_root->cache_radix,
CTREE_EXTENT_PENDING_DEL))
@ -232,11 +233,11 @@ static int run_pending(struct ctree_root *extent_root)
/*
* remove an extent from the root, returns 0 on success
*/
int free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks)
int btrfs_free_extent(struct btrfs_root *root, u64 blocknr, u64 num_blocks)
{
struct btrfs_key key;
struct ctree_root *extent_root = root->extent_root;
struct tree_buffer *t;
struct btrfs_root *extent_root = root->extent_root;
struct btrfs_buffer *t;
int pending_ret;
int ret;
@ -262,11 +263,11 @@ int free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks)
* ins->offset == number of blocks
* Any available blocks before search_start are skipped.
*/
static int find_free_extent(struct ctree_root *orig_root, u64 num_blocks,
static int find_free_extent(struct btrfs_root *orig_root, u64 num_blocks,
u64 search_start, u64 search_end,
struct btrfs_key *ins)
{
struct ctree_path path;
struct btrfs_path path;
struct btrfs_key key;
int ret;
u64 hole_size = 0;
@ -274,20 +275,20 @@ static int find_free_extent(struct ctree_root *orig_root, u64 num_blocks,
u64 last_block;
u64 test_block;
int start_found;
struct leaf *l;
struct ctree_root * root = orig_root->extent_root;
struct btrfs_leaf *l;
struct btrfs_root * root = orig_root->extent_root;
int total_needed = num_blocks;
total_needed += (btrfs_header_level(&root->node->node.header) + 1) * 3;
if (root->last_insert.objectid > search_start)
search_start = root->last_insert.objectid;
check_failed:
init_path(&path);
btrfs_init_path(&path);
ins->objectid = search_start;
ins->offset = 0;
ins->flags = 0;
start_found = 0;
ret = search_slot(root, ins, &path, 0, 0);
ret = btrfs_search_slot(root, ins, &path, 0, 0);
if (ret < 0)
goto error;
@ -298,7 +299,7 @@ check_failed:
l = &path.nodes[0]->leaf;
slot = path.slots[0];
if (slot >= btrfs_header_nritems(&l->header)) {
ret = next_leaf(root, &path);
ret = btrfs_next_leaf(root, &path);
if (ret == 0)
continue;
if (ret < 0)
@ -336,7 +337,7 @@ check_pending:
/* we have to make sure we didn't find an extent that has already
* been allocated by the map tree or the original allocation
*/
release_path(root, &path);
btrfs_release_path(root, &path);
BUG_ON(ins->objectid < search_start);
for (test_block = ins->objectid;
test_block < ins->objectid + total_needed; test_block++) {
@ -353,7 +354,7 @@ check_pending:
ins->offset = num_blocks;
return 0;
error:
release_path(root, &path);
btrfs_release_path(root, &path);
return ret;
}
@ -364,13 +365,13 @@ error:
*
* returns 0 if everything worked, non-zero otherwise.
*/
int alloc_extent(struct ctree_root *root, u64 num_blocks, u64 search_start,
int alloc_extent(struct btrfs_root *root, u64 num_blocks, u64 search_start,
u64 search_end, u64 owner, struct btrfs_key *ins)
{
int ret;
int pending_ret;
struct ctree_root *extent_root = root->extent_root;
struct extent_item extent_item;
struct btrfs_root *extent_root = root->extent_root;
struct btrfs_extent_item extent_item;
btrfs_set_extent_refs(&extent_item, 1);
btrfs_set_extent_owner(&extent_item, owner);
@ -390,7 +391,7 @@ int alloc_extent(struct ctree_root *root, u64 num_blocks, u64 search_start,
if (ret)
return ret;
ret = insert_item(extent_root, ins, &extent_item,
ret = btrfs_insert_item(extent_root, ins, &extent_item,
sizeof(extent_item));
finish_current_insert(extent_root);
@ -406,11 +407,11 @@ int alloc_extent(struct ctree_root *root, u64 num_blocks, u64 search_start,
* helper function to allocate a block for a given tree
* returns the tree buffer or NULL.
*/
struct tree_buffer *alloc_free_block(struct ctree_root *root)
struct btrfs_buffer *btrfs_alloc_free_block(struct btrfs_root *root)
{
struct btrfs_key ins;
int ret;
struct tree_buffer *buf;
struct btrfs_buffer *buf;
ret = alloc_extent(root, 1, 0, (unsigned long)-1,
btrfs_header_parentid(&root->node->node.header),
@ -424,10 +425,10 @@ struct tree_buffer *alloc_free_block(struct ctree_root *root)
return buf;
}
int walk_down_tree(struct ctree_root *root, struct ctree_path *path, int *level)
int walk_down_tree(struct btrfs_root *root, struct btrfs_path *path, int *level)
{
struct tree_buffer *next;
struct tree_buffer *cur;
struct btrfs_buffer *next;
struct btrfs_buffer *cur;
u64 blocknr;
int ret;
u32 refs;
@ -445,33 +446,33 @@ int walk_down_tree(struct ctree_root *root, struct ctree_path *path, int *level)
ret = lookup_block_ref(root, blocknr, &refs);
if (refs != 1 || *level == 1) {
path->slots[*level]++;
ret = free_extent(root, blocknr, 1);
ret = btrfs_free_extent(root, blocknr, 1);
BUG_ON(ret);
continue;
}
BUG_ON(ret);
next = read_tree_block(root, blocknr);
if (path->nodes[*level-1])
tree_block_release(root, path->nodes[*level-1]);
btrfs_block_release(root, path->nodes[*level-1]);
path->nodes[*level-1] = next;
*level = btrfs_header_level(&next->node.header);
path->slots[*level] = 0;
}
out:
ret = free_extent(root, path->nodes[*level]->blocknr, 1);
tree_block_release(root, path->nodes[*level]);
ret = btrfs_free_extent(root, path->nodes[*level]->blocknr, 1);
btrfs_block_release(root, path->nodes[*level]);
path->nodes[*level] = NULL;
*level += 1;
BUG_ON(ret);
return 0;
}
int walk_up_tree(struct ctree_root *root, struct ctree_path *path, int *level)
int walk_up_tree(struct btrfs_root *root, struct btrfs_path *path, int *level)
{
int i;
int slot;
int ret;
for(i = *level; i < MAX_LEVEL - 1 && path->nodes[i]; i++) {
for(i = *level; i < BTRFS_MAX_LEVEL - 1 && path->nodes[i]; i++) {
slot = path->slots[i];
if (slot <
btrfs_header_nritems(&path->nodes[i]->node.header)- 1) {
@ -479,9 +480,9 @@ int walk_up_tree(struct ctree_root *root, struct ctree_path *path, int *level)
*level = i;
return 0;
} else {
ret = free_extent(root,
ret = btrfs_free_extent(root,
path->nodes[*level]->blocknr, 1);
tree_block_release(root, path->nodes[*level]);
btrfs_block_release(root, path->nodes[*level]);
path->nodes[*level] = NULL;
*level = i + 1;
BUG_ON(ret);
@ -490,15 +491,15 @@ int walk_up_tree(struct ctree_root *root, struct ctree_path *path, int *level)
return 1;
}
int btrfs_drop_snapshot(struct ctree_root *root, struct tree_buffer *snap)
int btrfs_drop_snapshot(struct btrfs_root *root, struct btrfs_buffer *snap)
{
int ret;
int level;
struct ctree_path path;
struct btrfs_path path;
int i;
int orig_level;
init_path(&path);
btrfs_init_path(&path);
level = btrfs_header_level(&snap->node.header);
orig_level = level;
@ -514,7 +515,7 @@ int btrfs_drop_snapshot(struct ctree_root *root, struct tree_buffer *snap)
}
for (i = 0; i <= orig_level; i++) {
if (path.nodes[i]) {
tree_block_release(root, path.nodes[i]);
btrfs_block_release(root, path.nodes[i]);
}
}

26
mkfs.c
View File

@ -12,10 +12,10 @@
int mkfs(int fd)
{
struct ctree_root_info info[2];
struct leaf empty_leaf;
struct btrfs_root_info info[2];
struct btrfs_leaf empty_leaf;
struct btrfs_item item;
struct extent_item extent_item;
struct btrfs_extent_item extent_item;
int ret;
/* setup the super block area */
@ -28,7 +28,7 @@ int mkfs(int fd)
info[1].objectid = 2;
info[1].tree_root = 18;
ret = pwrite(fd, info, sizeof(info),
CTREE_SUPER_INFO_OFFSET(CTREE_BLOCKSIZE));
BTRFS_SUPER_INFO_OFFSET(BTRFS_BLOCKSIZE));
if (ret != sizeof(info))
return -1;
@ -36,7 +36,7 @@ int mkfs(int fd)
memset(&empty_leaf, 0, sizeof(empty_leaf));
btrfs_set_header_parentid(&empty_leaf.header, 1);
btrfs_set_header_blocknr(&empty_leaf.header, 17);
ret = pwrite(fd, &empty_leaf, sizeof(empty_leaf), 17 * CTREE_BLOCKSIZE);
ret = pwrite(fd, &empty_leaf, sizeof(empty_leaf), 17 * BTRFS_BLOCKSIZE);
if (ret != sizeof(empty_leaf))
return -1;
@ -48,9 +48,9 @@ int mkfs(int fd)
btrfs_set_key_objectid(&item.key, 0);
btrfs_set_key_offset(&item.key, 17);
btrfs_set_key_flags(&item.key, 0);
btrfs_set_item_offset(&item,
LEAF_DATA_SIZE - sizeof(struct extent_item));
btrfs_set_item_size(&item, sizeof(struct extent_item));
btrfs_set_item_offset(&item, LEAF_DATA_SIZE -
sizeof(struct btrfs_extent_item));
btrfs_set_item_size(&item, sizeof(struct btrfs_extent_item));
btrfs_set_extent_refs(&extent_item, 1);
btrfs_set_extent_owner(&extent_item, 0);
memcpy(empty_leaf.items, &item, sizeof(item));
@ -60,8 +60,8 @@ int mkfs(int fd)
/* item2, give block 17 to the root */
btrfs_set_key_objectid(&item.key, 17);
btrfs_set_key_offset(&item.key, 1);
btrfs_set_item_offset(&item,
LEAF_DATA_SIZE - sizeof(struct extent_item) * 2);
btrfs_set_item_offset(&item, LEAF_DATA_SIZE -
sizeof(struct btrfs_extent_item) * 2);
btrfs_set_extent_owner(&extent_item, 1);
memcpy(empty_leaf.items + 1, &item, sizeof(item));
memcpy(empty_leaf.data + btrfs_item_offset(&item), &extent_item,
@ -70,13 +70,13 @@ int mkfs(int fd)
/* item3, give block 18 for the extent root */
btrfs_set_key_objectid(&item.key, 18);
btrfs_set_key_offset(&item.key, 1);
btrfs_set_item_offset(&item,
LEAF_DATA_SIZE - sizeof(struct extent_item) * 3);
btrfs_set_item_offset(&item, LEAF_DATA_SIZE -
sizeof(struct btrfs_extent_item) * 3);
btrfs_set_extent_owner(&extent_item, 2);
memcpy(empty_leaf.items + 2, &item, sizeof(item));
memcpy(empty_leaf.data + btrfs_item_offset(&item), &extent_item,
btrfs_item_size(&item));
ret = pwrite(fd, &empty_leaf, sizeof(empty_leaf), 18 * CTREE_BLOCKSIZE);
ret = pwrite(fd, &empty_leaf, sizeof(empty_leaf), 18 * BTRFS_BLOCKSIZE);
if (ret != sizeof(empty_leaf))
return -1;
return 0;

23
print-tree.c
View File

@ -5,14 +5,14 @@
#include "ctree.h"
#include "disk-io.h"
void print_leaf(struct leaf *l)
void btrfs_print_leaf(struct btrfs_leaf *l)
{
int i;
u32 nr = btrfs_header_nritems(&l->header);
struct btrfs_item *item;
struct extent_item *ei;
struct btrfs_extent_item *ei;
printf("leaf %Lu total ptrs %d free space %d\n",
btrfs_header_blocknr(&l->header), nr, leaf_free_space(l));
btrfs_header_blocknr(&l->header), nr, btrfs_leaf_free_space(l));
fflush(stdout);
for (i = 0 ; i < nr ; i++) {
item = l->items + i;
@ -26,24 +26,25 @@ void print_leaf(struct leaf *l)
fflush(stdout);
printf("\t\titem data %.*s\n", btrfs_item_size(item),
l->data + btrfs_item_offset(item));
ei = (struct extent_item *)(l->data + btrfs_item_offset(item));
ei = (struct btrfs_extent_item *)(l->data +
btrfs_item_offset(item));
printf("\t\textent data refs %u owner %Lu\n", ei->refs,
ei->owner);
fflush(stdout);
}
}
void print_tree(struct ctree_root *root, struct tree_buffer *t)
void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
{
int i;
u32 nr;
struct node *c;
struct btrfs_node *c;
if (!t)
return;
c = &t->node;
nr = btrfs_header_nritems(&c->header);
if (btrfs_is_leaf(c)) {
print_leaf((struct leaf *)c);
btrfs_print_leaf((struct btrfs_leaf *)c);
return;
}
printf("node %Lu level %d total ptrs %d free spc %u\n", t->blocknr,
@ -58,17 +59,17 @@ void print_tree(struct ctree_root *root, struct tree_buffer *t)
fflush(stdout);
}
for (i = 0; i < nr; i++) {
struct tree_buffer *next_buf = read_tree_block(root,
struct btrfs_buffer *next_buf = read_tree_block(root,
btrfs_node_blockptr(c, i));
struct node *next = &next_buf->node;
struct btrfs_node *next = &next_buf->node;
if (btrfs_is_leaf(next) &&
btrfs_header_level(&c->header) != 1)
BUG();
if (btrfs_header_level(&next->header) !=
btrfs_header_level(&c->header) - 1)
BUG();
print_tree(root, next_buf);
tree_block_release(root, next_buf);
btrfs_print_tree(root, next_buf);
btrfs_block_release(root, next_buf);
}
}

4
print-tree.h
View File

@ -1,3 +1,3 @@
void print_leaf(struct leaf *l);
void print_tree(struct ctree_root *root, struct tree_buffer *t);
void btrfs_print_leaf(struct btrfs_leaf *l);
void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t);

54
quick-test.c
View File

@ -22,9 +22,9 @@ int main(int ac, char **av) {
int run_size = 100000;
int max_key = 100000000;
int tree_size = 0;
struct ctree_path path;
struct ctree_super_block super;
struct ctree_root *root;
struct btrfs_path path;
struct btrfs_super_block super;
struct btrfs_root *root;
radix_tree_init();
@ -40,12 +40,12 @@ int main(int ac, char **av) {
ins.objectid = num;
ins.offset = 0;
ins.flags = 0;
ret = insert_item(root, &ins, buf, strlen(buf));
ret = btrfs_insert_item(root, &ins, buf, strlen(buf));
if (!ret)
tree_size++;
free(buf);
if (i == run_size - 5) {
commit_transaction(root, &super);
btrfs_commit_transaction(root, &super);
}
}
@ -57,16 +57,16 @@ int main(int ac, char **av) {
for (i = 0; i < run_size; i++) {
num = next_key(i, max_key);
ins.objectid = num;
init_path(&path);
btrfs_init_path(&path);
if (i % 10000 == 0)
fprintf(stderr, "search %d:%d\n", num, i);
ret = search_slot(root, &ins, &path, 0, 0);
ret = btrfs_search_slot(root, &ins, &path, 0, 0);
if (ret) {
print_tree(root, root->node);
btrfs_print_tree(root, root->node);
printf("unable to find %d\n", num);
exit(1);
}
release_path(root, &path);
btrfs_release_path(root, &path);
}
close_ctree(root, &super);
root = open_ctree("dbfile", &super);
@ -81,17 +81,17 @@ int main(int ac, char **av) {
for (i = 0 ; i < run_size/4; i++) {
num = next_key(i, max_key);
ins.objectid = num;
init_path(&path);
ret = search_slot(root, &ins, &path, -1, 1);
btrfs_init_path(&path);
ret = btrfs_search_slot(root, &ins, &path, -1, 1);
if (!ret) {
if (i % 10000 == 0)
fprintf(stderr, "del %d:%d\n", num, i);
ret = del_item(root, &path);
ret = btrfs_del_item(root, &path);
if (ret != 0)
BUG();
tree_size--;
}
release_path(root, &path);
btrfs_release_path(root, &path);
}
close_ctree(root, &super);
root = open_ctree("dbfile", &super);
@ -103,7 +103,7 @@ int main(int ac, char **av) {
ins.objectid = num;
if (i % 10000 == 0)
fprintf(stderr, "insert %d:%d\n", num, i);
ret = insert_item(root, &ins, buf, strlen(buf));
ret = btrfs_insert_item(root, &ins, buf, strlen(buf));
if (!ret)
tree_size++;
free(buf);
@ -115,25 +115,25 @@ int main(int ac, char **av) {
for (i = 0; i < run_size; i++) {
num = next_key(i, max_key);
ins.objectid = num;
init_path(&path);
btrfs_init_path(&path);
if (i % 10000 == 0)
fprintf(stderr, "search %d:%d\n", num, i);
ret = search_slot(root, &ins, &path, 0, 0);
ret = btrfs_search_slot(root, &ins, &path, 0, 0);
if (ret) {
print_tree(root, root->node);
btrfs_print_tree(root, root->node);
printf("unable to find %d\n", num);
exit(1);
}
release_path(root, &path);
btrfs_release_path(root, &path);
}
printf("starting big long delete run\n");
while(root->node &&
btrfs_header_nritems(&root->node->node.header) > 0) {
struct leaf *leaf;
struct btrfs_leaf *leaf;
int slot;
ins.objectid = (u64)-1;
init_path(&path);
ret = search_slot(root, &ins, &path, -1, 1);
btrfs_init_path(&path);
ret = btrfs_search_slot(root, &ins, &path, -1, 1);
if (ret == 0)
BUG();
@ -149,26 +149,26 @@ int main(int ac, char **av) {
btrfs_disk_key_to_cpu(&last, &leaf->items[slot].key);
if (tree_size % 10000 == 0)
printf("big del %d:%d\n", tree_size, i);
ret = del_item(root, &path);
ret = btrfs_del_item(root, &path);
if (ret != 0) {
printf("del_item returned %d\n", ret);
BUG();
}
tree_size--;
}
release_path(root, &path);
btrfs_release_path(root, &path);
}
/*
printf("previous tree:\n");
print_tree(root, root->commit_root);
btrfs_print_tree(root, root->commit_root);
printf("map before commit\n");
print_tree(root->extent_root, root->extent_root->node);
btrfs_print_tree(root->extent_root, root->extent_root->node);
*/
commit_transaction(root, &super);
btrfs_commit_transaction(root, &super);
printf("tree size is now %d\n", tree_size);
printf("root %p commit root %p\n", root->node, root->commit_root);
printf("map tree\n");
print_tree(root->extent_root, root->extent_root->node);
btrfs_print_tree(root->extent_root, root->extent_root->node);
close_ctree(root, &super);
return 0;
}

92
random-test.c
View File

@ -8,7 +8,7 @@
#include "print-tree.h"
int keep_running = 1;
struct ctree_super_block super;
struct btrfs_super_block super;
static int setup_key(struct radix_tree_root *root, struct btrfs_key *key,
int exists)
@ -36,17 +36,17 @@ again:
return 0;
}
static int ins_one(struct ctree_root *root, struct radix_tree_root *radix)
static int ins_one(struct btrfs_root *root, struct radix_tree_root *radix)
{
struct ctree_path path;
struct btrfs_path path;
struct btrfs_key key;
int ret;
char buf[128];
unsigned long oid;
init_path(&path);
btrfs_init_path(&path);
ret = setup_key(radix, &key, 0);
sprintf(buf, "str-%Lu\n", key.objectid);
ret = insert_item(root, &key, buf, strlen(buf));
ret = btrfs_insert_item(root, &key, buf, strlen(buf));
if (ret)
goto error;
oid = (unsigned long)key.objectid;
@ -61,18 +61,18 @@ error:
return -1;
}
static int insert_dup(struct ctree_root *root, struct radix_tree_root *radix)
static int insert_dup(struct btrfs_root *root, struct radix_tree_root *radix)
{
struct ctree_path path;
struct btrfs_path path;
struct btrfs_key key;
int ret;
char buf[128];
init_path(&path);
btrfs_init_path(&path);
ret = setup_key(radix, &key, 1);
if (ret < 0)
return 0;
sprintf(buf, "str-%Lu\n", key.objectid);
ret = insert_item(root, &key, buf, strlen(buf));
ret = btrfs_insert_item(root, &key, buf, strlen(buf));
if (ret != -EEXIST) {
printf("insert on %Lu gave us %d\n", key.objectid, ret);
return 1;
@ -80,21 +80,21 @@ static int insert_dup(struct ctree_root *root, struct radix_tree_root *radix)
return 0;
}
static int del_one(struct ctree_root *root, struct radix_tree_root *radix)
static int del_one(struct btrfs_root *root, struct radix_tree_root *radix)
{
struct ctree_path path;
struct btrfs_path path;
struct btrfs_key key;
int ret;
unsigned long *ptr;
init_path(&path);
btrfs_init_path(&path);
ret = setup_key(radix, &key, 1);
if (ret < 0)
return 0;
ret = search_slot(root, &key, &path, -1, 1);
ret = btrfs_search_slot(root, &key, &path, -1, 1);
if (ret)
goto error;
ret = del_item(root, &path);
release_path(root, &path);
ret = btrfs_del_item(root, &path);
btrfs_release_path(root, &path);
if (ret != 0)
goto error;
ptr = radix_tree_delete(radix, key.objectid);
@ -106,17 +106,17 @@ error:
return -1;
}
static int lookup_item(struct ctree_root *root, struct radix_tree_root *radix)
static int lookup_item(struct btrfs_root *root, struct radix_tree_root *radix)
{
struct ctree_path path;
struct btrfs_path path;
struct btrfs_key key;
int ret;
init_path(&path);
btrfs_init_path(&path);
ret = setup_key(radix, &key, 1);
if (ret < 0)
return 0;
ret = search_slot(root, &key, &path, 0, 1);
release_path(root, &path);
ret = btrfs_search_slot(root, &key, &path, 0, 1);
btrfs_release_path(root, &path);
if (ret)
goto error;
return 0;
@ -125,17 +125,17 @@ error:
return -1;
}
static int lookup_enoent(struct ctree_root *root, struct radix_tree_root *radix)
static int lookup_enoent(struct btrfs_root *root, struct radix_tree_root *radix)
{
struct ctree_path path;
struct btrfs_path path;
struct btrfs_key key;
int ret;
init_path(&path);
btrfs_init_path(&path);
ret = setup_key(radix, &key, 0);
if (ret < 0)
return ret;
ret = search_slot(root, &key, &path, 0, 0);
release_path(root, &path);
ret = btrfs_search_slot(root, &key, &path, 0, 0);
btrfs_release_path(root, &path);
if (ret <= 0)
goto error;
return 0;
@ -144,10 +144,10 @@ error:
return -1;
}
static int empty_tree(struct ctree_root *root, struct radix_tree_root *radix,
static int empty_tree(struct btrfs_root *root, struct radix_tree_root *radix,
int nr)
{
struct ctree_path path;
struct btrfs_path path;
struct btrfs_key key;
unsigned long found = 0;
int ret;
@ -159,22 +159,22 @@ static int empty_tree(struct ctree_root *root, struct radix_tree_root *radix,
key.flags = 0;
key.objectid = (unsigned long)-1;
while(nr-- >= 0) {
init_path(&path);
ret = search_slot(root, &key, &path, -1, 1);
btrfs_init_path(&path);
ret = btrfs_search_slot(root, &key, &path, -1, 1);
if (ret < 0) {
release_path(root, &path);
btrfs_release_path(root, &path);
return ret;
}
if (ret != 0) {
if (path.slots[0] == 0) {
release_path(root, &path);
btrfs_release_path(root, &path);
break;
}
path.slots[0] -= 1;
}
slot = path.slots[0];
found=btrfs_key_objectid(&path.nodes[0]->leaf.items[slot].key);
ret = del_item(root, &path);
ret = btrfs_del_item(root, &path);
count++;
if (ret) {
fprintf(stderr,
@ -182,7 +182,7 @@ static int empty_tree(struct ctree_root *root, struct radix_tree_root *radix,
found);
return -1;
}
release_path(root, &path);
btrfs_release_path(root, &path);
ptr = radix_tree_delete(radix, found);
if (!ptr)
goto error;
@ -195,7 +195,7 @@ error:
return -1;
}
static int fill_tree(struct ctree_root *root, struct radix_tree_root *radix,
static int fill_tree(struct btrfs_root *root, struct radix_tree_root *radix,
int count)
{
int i;
@ -207,7 +207,7 @@ static int fill_tree(struct ctree_root *root, struct radix_tree_root *radix,
goto out;
}
if (i % 1000 == 0) {
ret = commit_transaction(root, &super);
ret = btrfs_commit_transaction(root, &super);
if (ret) {
fprintf(stderr, "fill commit failed\n");
return ret;
@ -223,7 +223,7 @@ out:
return ret;
}
static int bulk_op(struct ctree_root *root, struct radix_tree_root *radix)
static int bulk_op(struct btrfs_root *root, struct radix_tree_root *radix)
{
int ret;
int nr = rand() % 5000;
@ -242,13 +242,13 @@ static int bulk_op(struct ctree_root *root, struct radix_tree_root *radix)
}
int (*ops[])(struct ctree_root *root, struct radix_tree_root *radix) =
int (*ops[])(struct btrfs_root *root, struct radix_tree_root *radix) =
{ ins_one, insert_dup, del_one, lookup_item,
lookup_enoent, bulk_op };
static int fill_radix(struct ctree_root *root, struct radix_tree_root *radix)
static int fill_radix(struct btrfs_root *root, struct radix_tree_root *radix)
{
struct ctree_path path;
struct btrfs_path path;
struct btrfs_key key;
unsigned long found;
int ret;
@ -259,16 +259,16 @@ static int fill_radix(struct ctree_root *root, struct radix_tree_root *radix)
key.flags = 0;
key.objectid = (unsigned long)-1;
while(1) {
init_path(&path);
ret = search_slot(root, &key, &path, 0, 0);
btrfs_init_path(&path);
ret = btrfs_search_slot(root, &key, &path, 0, 0);
if (ret < 0) {
release_path(root, &path);
btrfs_release_path(root, &path);
return ret;
}
slot = path.slots[0];
if (ret != 0) {
if (slot == 0) {
release_path(root, &path);
btrfs_release_path(root, &path);
break;
}
slot -= 1;
@ -287,7 +287,7 @@ static int fill_radix(struct ctree_root *root, struct radix_tree_root *radix)
radix_tree_preload_end();
}
release_path(root, &path);
btrfs_release_path(root, &path);
key.objectid = found - 1;
if (key.objectid > found)
break;
@ -312,7 +312,7 @@ int print_usage(void)
int main(int ac, char **av)
{
RADIX_TREE(radix, GFP_KERNEL);
struct ctree_root *root;
struct btrfs_root *root;
int i;
int ret;
int count;
@ -370,7 +370,7 @@ int main(int ac, char **av)
if (ret) {
fprintf(stderr, "op %d failed %d:%d\n",
op, i, iterations);
print_tree(root, root->node);
btrfs_print_tree(root, root->node);
fprintf(stderr, "op %d failed %d:%d\n",
op, i, iterations);
err = ret;