-#include <stdio.h>
-#include <stdlib.h>
-#include "kerncompat.h"
-#include "radix-tree.h"
+#include <linux/module.h>
#include "ctree.h"
#include "disk-io.h"
-#include "print-tree.h"
+#include "transaction.h"
static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, int level);
static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct btrfs_path *path, int data_size);
+ *root, struct btrfs_key *ins_key,
+ struct btrfs_path *path, int data_size);
static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct btrfs_buffer *dst, struct btrfs_buffer
+ *root, struct buffer_head *dst, struct buffer_head
*src);
static int balance_node_right(struct btrfs_trans_handle *trans, struct
- btrfs_root *root, struct btrfs_buffer *dst_buf,
- struct btrfs_buffer *src_buf);
+ btrfs_root *root, struct buffer_head *dst_buf,
+ struct buffer_head *src_buf);
static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_path *path, int level, int slot);
memset(p, 0, sizeof(*p));
}
+struct btrfs_path *btrfs_alloc_path(void)
+{
+ struct btrfs_path *path;
+ path = kmem_cache_alloc(btrfs_path_cachep, GFP_NOFS);
+ if (path)
+ btrfs_init_path(path);
+ return path;
+}
+
+void btrfs_free_path(struct btrfs_path *p)
+{
+ btrfs_release_path(NULL, p);
+ kmem_cache_free(btrfs_path_cachep, p);
+}
+
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p)
{
int i;
}
static int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct btrfs_buffer *buf, struct btrfs_buffer
- *parent, int parent_slot, struct btrfs_buffer
+ *root, struct buffer_head *buf, struct buffer_head
+ *parent, int parent_slot, struct buffer_head
**cow_ret)
{
- struct btrfs_buffer *cow;
+ struct buffer_head *cow;
+ struct btrfs_node *cow_node;
- if (!list_empty(&buf->dirty)) {
+ if (btrfs_header_generation(btrfs_buffer_header(buf)) ==
+ trans->transid) {
*cow_ret = buf;
return 0;
}
cow = btrfs_alloc_free_block(trans, root);
- memcpy(&cow->node, &buf->node, root->blocksize);
- btrfs_set_header_blocknr(&cow->node.header, cow->blocknr);
- *cow_ret = cow;
+ cow_node = btrfs_buffer_node(cow);
+ if (buf->b_size != root->blocksize || cow->b_size != root->blocksize)
+ WARN_ON(1);
+ memcpy(cow_node, btrfs_buffer_node(buf), root->blocksize);
+ btrfs_set_header_blocknr(&cow_node->header, bh_blocknr(cow));
+ btrfs_set_header_generation(&cow_node->header, trans->transid);
+ btrfs_set_header_owner(&cow_node->header, root->root_key.objectid);
btrfs_inc_ref(trans, root, buf);
if (buf == root->node) {
root->node = cow;
- cow->count++;
- if (buf != root->commit_root)
- btrfs_free_extent(trans, root, buf->blocknr, 1, 1);
+ get_bh(cow);
+ if (buf != root->commit_root) {
+ btrfs_free_extent(trans, root, bh_blocknr(buf), 1, 1);
+ }
btrfs_block_release(root, buf);
} else {
- btrfs_set_node_blockptr(&parent->node, parent_slot,
- cow->blocknr);
- BUG_ON(list_empty(&parent->dirty));
- btrfs_free_extent(trans, root, buf->blocknr, 1, 1);
+ btrfs_set_node_blockptr(btrfs_buffer_node(parent), parent_slot,
+ bh_blocknr(cow));
+ btrfs_mark_buffer_dirty(parent);
+ btrfs_free_extent(trans, root, bh_blocknr(buf), 1, 1);
}
btrfs_block_release(root, buf);
+ mark_buffer_dirty(cow);
+ *cow_ret = cow;
return 0;
}
return btrfs_item_offset(leaf->items + nr - 1);
}
-/*
- * The space between the end of the leaf items and
- * the start of the leaf data. IOW, how much room
- * the leaf has left for both items and data
- */
-int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf)
-{
- int data_end = leaf_data_end(root, leaf);
- int nritems = btrfs_header_nritems(&leaf->header);
- char *items_end = (char *)(leaf->items + nritems + 1);
- return (char *)(btrfs_leaf_data(leaf) + data_end) - (char *)items_end;
-}
-
/*
* compare two keys in a memcmp fashion
*/
{
int i;
struct btrfs_node *parent = NULL;
- struct btrfs_node *node = &path->nodes[level]->node;
+ struct btrfs_node *node = btrfs_buffer_node(path->nodes[level]);
int parent_slot;
u32 nritems = btrfs_header_nritems(&node->header);
if (path->nodes[level + 1])
- parent = &path->nodes[level + 1]->node;
+ parent = btrfs_buffer_node(path->nodes[level + 1]);
parent_slot = path->slots[level + 1];
BUG_ON(nritems == 0);
if (parent) {
int level)
{
int i;
- struct btrfs_leaf *leaf = &path->nodes[level]->leaf;
+ struct btrfs_leaf *leaf = btrfs_buffer_leaf(path->nodes[level]);
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 = btrfs_buffer_node(path->nodes[level + 1]);
parent_slot = path->slots[level + 1];
BUG_ON(btrfs_leaf_free_space(root, leaf) < 0);
static int check_block(struct btrfs_root *root, struct btrfs_path *path,
int level)
{
+ struct btrfs_node *node = btrfs_buffer_node(path->nodes[level]);
+ if (memcmp(node->header.fsid, root->fs_info->disk_super->fsid,
+ sizeof(node->header.fsid)))
+ BUG();
if (level == 0)
return check_leaf(root, path, level);
return check_node(root, path, level);
return -1;
}
-static struct btrfs_buffer *read_node_slot(struct btrfs_root *root,
- struct btrfs_buffer *parent_buf,
+static struct buffer_head *read_node_slot(struct btrfs_root *root,
+ struct buffer_head *parent_buf,
int slot)
{
- struct btrfs_node *node = &parent_buf->node;
+ struct btrfs_node *node = btrfs_buffer_node(parent_buf);
if (slot < 0)
return NULL;
if (slot >= btrfs_header_nritems(&node->header))
static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, int level)
{
- struct btrfs_buffer *right_buf;
- struct btrfs_buffer *mid_buf;
- struct btrfs_buffer *left_buf;
- struct btrfs_buffer *parent_buf = NULL;
+ struct buffer_head *right_buf;
+ struct buffer_head *mid_buf;
+ struct buffer_head *left_buf;
+ struct buffer_head *parent_buf = NULL;
struct btrfs_node *right = NULL;
struct btrfs_node *mid;
struct btrfs_node *left = NULL;
return 0;
mid_buf = path->nodes[level];
- mid = &mid_buf->node;
+ mid = btrfs_buffer_node(mid_buf);
orig_ptr = btrfs_node_blockptr(mid, orig_slot);
if (level < BTRFS_MAX_LEVEL - 1)
parent_buf = path->nodes[level + 1];
pslot = path->slots[level + 1];
+ /*
+ * deal with the case where there is only one pointer in the root
+ * by promoting the node below to a root
+ */
if (!parent_buf) {
- struct btrfs_buffer *child;
- u64 blocknr = mid_buf->blocknr;
+ struct buffer_head *child;
+ u64 blocknr = bh_blocknr(mid_buf);
if (btrfs_header_nritems(&mid->header) != 1)
return 0;
BUG_ON(!child);
root->node = child;
path->nodes[level] = NULL;
+ clean_tree_block(trans, root, mid_buf);
+ wait_on_buffer(mid_buf);
/* once for the path */
btrfs_block_release(root, mid_buf);
/* once for the root ptr */
btrfs_block_release(root, mid_buf);
- clean_tree_block(trans, root, mid_buf);
return btrfs_free_extent(trans, root, blocknr, 1, 1);
}
- parent = &parent_buf->node;
+ parent = btrfs_buffer_node(parent_buf);
if (btrfs_header_nritems(&mid->header) >
BTRFS_NODEPTRS_PER_BLOCK(root) / 4)
if (left_buf) {
btrfs_cow_block(trans, root, left_buf, parent_buf, pslot - 1,
&left_buf);
- left = &left_buf->node;
+ left = btrfs_buffer_node(left_buf);
orig_slot += btrfs_header_nritems(&left->header);
wret = push_node_left(trans, root, left_buf, mid_buf);
if (wret < 0)
if (right_buf) {
btrfs_cow_block(trans, root, right_buf, parent_buf, pslot + 1,
&right_buf);
- right = &right_buf->node;
+ right = btrfs_buffer_node(right_buf);
wret = push_node_left(trans, root, mid_buf, right_buf);
if (wret < 0)
ret = wret;
if (btrfs_header_nritems(&right->header) == 0) {
- u64 blocknr = right_buf->blocknr;
- btrfs_block_release(root, right_buf);
+ u64 blocknr = bh_blocknr(right_buf);
clean_tree_block(trans, root, right_buf);
+ wait_on_buffer(right_buf);
+ btrfs_block_release(root, right_buf);
right_buf = NULL;
right = NULL;
wret = del_ptr(trans, root, path, level + 1, pslot +
if (wret)
ret = wret;
} else {
- memcpy(&parent->ptrs[pslot + 1].key,
- &right->ptrs[0].key,
- sizeof(struct btrfs_disk_key));
- BUG_ON(list_empty(&parent_buf->dirty));
+ btrfs_memcpy(root, parent,
+ &parent->ptrs[pslot + 1].key,
+ &right->ptrs[0].key,
+ sizeof(struct btrfs_disk_key));
+ btrfs_mark_buffer_dirty(parent_buf);
}
}
if (btrfs_header_nritems(&mid->header) == 1) {
}
if (btrfs_header_nritems(&mid->header) == 0) {
/* we've managed to empty the middle node, drop it */
- u64 blocknr = mid_buf->blocknr;
- btrfs_block_release(root, mid_buf);
+ u64 blocknr = bh_blocknr(mid_buf);
clean_tree_block(trans, root, mid_buf);
+ wait_on_buffer(mid_buf);
+ btrfs_block_release(root, mid_buf);
mid_buf = NULL;
mid = NULL;
wret = del_ptr(trans, root, path, level + 1, pslot);
ret = wret;
} else {
/* update the parent key to reflect our changes */
- memcpy(&parent->ptrs[pslot].key, &mid->ptrs[0].key,
- sizeof(struct btrfs_disk_key));
- BUG_ON(list_empty(&parent_buf->dirty));
+ btrfs_memcpy(root, parent,
+ &parent->ptrs[pslot].key, &mid->ptrs[0].key,
+ sizeof(struct btrfs_disk_key));
+ btrfs_mark_buffer_dirty(parent_buf);
}
/* update the path */
if (left_buf) {
if (btrfs_header_nritems(&left->header) > orig_slot) {
- left_buf->count++; // released below
+ get_bh(left_buf);
path->nodes[level] = left_buf;
path->slots[level + 1] -= 1;
path->slots[level] = orig_slot;
}
/* double check we haven't messed things up */
check_block(root, path, level);
- if (orig_ptr != btrfs_node_blockptr(&path->nodes[level]->node,
- path->slots[level]))
+ if (orig_ptr !=
+ btrfs_node_blockptr(btrfs_buffer_node(path->nodes[level]),
+ path->slots[level]))
BUG();
if (right_buf)
return ret;
}
+/* returns zero if the push worked, non-zero otherwise */
+static int push_nodes_for_insert(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, int level)
+{
+ struct buffer_head *right_buf;
+ struct buffer_head *mid_buf;
+ struct buffer_head *left_buf;
+ struct buffer_head *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;
+ int orig_slot = path->slots[level];
+ u64 orig_ptr;
+
+ if (level == 0)
+ return 1;
+
+ mid_buf = path->nodes[level];
+ mid = btrfs_buffer_node(mid_buf);
+ orig_ptr = btrfs_node_blockptr(mid, orig_slot);
+
+ if (level < BTRFS_MAX_LEVEL - 1)
+ parent_buf = path->nodes[level + 1];
+ pslot = path->slots[level + 1];
+
+ if (!parent_buf)
+ return 1;
+ parent = btrfs_buffer_node(parent_buf);
+
+ left_buf = read_node_slot(root, parent_buf, pslot - 1);
+
+ /* first, try to make some room in the middle buffer */
+ if (left_buf) {
+ u32 left_nr;
+ left = btrfs_buffer_node(left_buf);
+ left_nr = btrfs_header_nritems(&left->header);
+ if (left_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
+ wret = 1;
+ } else {
+ btrfs_cow_block(trans, root, left_buf, parent_buf,
+ pslot - 1, &left_buf);
+ left = btrfs_buffer_node(left_buf);
+ wret = push_node_left(trans, root, left_buf, mid_buf);
+ }
+ if (wret < 0)
+ ret = wret;
+ if (wret == 0) {
+ orig_slot += left_nr;
+ btrfs_memcpy(root, parent,
+ &parent->ptrs[pslot].key,
+ &mid->ptrs[0].key,
+ sizeof(struct btrfs_disk_key));
+ btrfs_mark_buffer_dirty(parent_buf);
+ if (btrfs_header_nritems(&left->header) > orig_slot) {
+ path->nodes[level] = left_buf;
+ path->slots[level + 1] -= 1;
+ path->slots[level] = orig_slot;
+ btrfs_block_release(root, mid_buf);
+ } else {
+ orig_slot -=
+ btrfs_header_nritems(&left->header);
+ path->slots[level] = orig_slot;
+ btrfs_block_release(root, left_buf);
+ }
+ check_node(root, path, level);
+ return 0;
+ }
+ btrfs_block_release(root, left_buf);
+ }
+ right_buf = read_node_slot(root, parent_buf, pslot + 1);
+
+ /*
+ * then try to empty the right most buffer into the middle
+ */
+ if (right_buf) {
+ u32 right_nr;
+ right = btrfs_buffer_node(right_buf);
+ right_nr = btrfs_header_nritems(&right->header);
+ if (right_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
+ wret = 1;
+ } else {
+ btrfs_cow_block(trans, root, right_buf,
+ parent_buf, pslot + 1, &right_buf);
+ right = btrfs_buffer_node(right_buf);
+ wret = balance_node_right(trans, root,
+ right_buf, mid_buf);
+ }
+ if (wret < 0)
+ ret = wret;
+ if (wret == 0) {
+ btrfs_memcpy(root, parent,
+ &parent->ptrs[pslot + 1].key,
+ &right->ptrs[0].key,
+ sizeof(struct btrfs_disk_key));
+ btrfs_mark_buffer_dirty(parent_buf);
+ if (btrfs_header_nritems(&mid->header) <= orig_slot) {
+ path->nodes[level] = right_buf;
+ path->slots[level + 1] += 1;
+ path->slots[level] = orig_slot -
+ btrfs_header_nritems(&mid->header);
+ btrfs_block_release(root, mid_buf);
+ } else {
+ btrfs_block_release(root, right_buf);
+ }
+ check_node(root, path, level);
+ return 0;
+ }
+ btrfs_block_release(root, right_buf);
+ }
+ check_node(root, path, level);
+ return 1;
+}
+
/*
* look for key in the tree. path is filled in with nodes along the way
* if key is found, we return zero and you can find the item in the leaf
*root, struct btrfs_key *key, struct btrfs_path *p, int
ins_len, int cow)
{
- struct btrfs_buffer *b;
- struct btrfs_buffer *cow_buf;
+ struct buffer_head *b;
+ struct buffer_head *cow_buf;
struct btrfs_node *c;
int slot;
int ret;
int level;
+ WARN_ON(p->nodes[0] != NULL);
+ WARN_ON(!mutex_is_locked(&root->fs_info->fs_mutex));
again:
b = root->node;
- b->count++;
+ get_bh(b);
while (b) {
- level = btrfs_header_level(&b->node.header);
+ c = btrfs_buffer_node(b);
+ level = btrfs_header_level(&c->header);
if (cow) {
int wret;
- wret = btrfs_cow_block(trans, root, b, p->nodes[level +
- 1], p->slots[level + 1],
+ wret = btrfs_cow_block(trans, root, b,
+ p->nodes[level + 1],
+ p->slots[level + 1],
&cow_buf);
b = cow_buf;
+ c = btrfs_buffer_node(b);
}
BUG_ON(!cow && ins_len);
- c = &b->node;
+ if (level != btrfs_header_level(&c->header))
+ WARN_ON(1);
+ level = btrfs_header_level(&c->header);
p->nodes[level] = b;
ret = check_block(root, p, level);
if (ret)
if (ret && slot > 0)
slot -= 1;
p->slots[level] = slot;
- if (ins_len > 0 && btrfs_header_nritems(&c->header) ==
- BTRFS_NODEPTRS_PER_BLOCK(root)) {
+ if (ins_len > 0 && btrfs_header_nritems(&c->header) >=
+ BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
int sret = split_node(trans, root, p, level);
BUG_ON(sret > 0);
if (sret)
return sret;
b = p->nodes[level];
- c = &b->node;
+ c = btrfs_buffer_node(b);
slot = p->slots[level];
} else if (ins_len < 0) {
int sret = balance_level(trans, root, p,
b = p->nodes[level];
if (!b)
goto again;
- c = &b->node;
+ c = btrfs_buffer_node(b);
slot = p->slots[level];
BUG_ON(btrfs_header_nritems(&c->header) == 1);
}
p->slots[level] = slot;
if (ins_len > 0 && btrfs_leaf_free_space(root, l) <
sizeof(struct btrfs_item) + ins_len) {
- int sret = split_leaf(trans, root, p, ins_len);
+ int sret = split_leaf(trans, root, key,
+ p, ins_len);
BUG_ON(sret > 0);
if (sret)
return sret;
}
- BUG_ON(root->node->count == 1);
return ret;
}
}
- BUG_ON(root->node->count == 1);
return 1;
}
int tslot = path->slots[i];
if (!path->nodes[i])
break;
- t = &path->nodes[i]->node;
- memcpy(&t->ptrs[tslot].key, key, sizeof(*key));
- BUG_ON(list_empty(&path->nodes[i]->dirty));
+ t = btrfs_buffer_node(path->nodes[i]);
+ btrfs_memcpy(root, t, &t->ptrs[tslot].key, key, sizeof(*key));
+ btrfs_mark_buffer_dirty(path->nodes[i]);
if (tslot != 0)
break;
}
* error, and > 0 if there was no room in the left hand block.
*/
static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct btrfs_buffer *dst_buf, struct
- btrfs_buffer *src_buf)
+ *root, struct buffer_head *dst_buf, struct
+ buffer_head *src_buf)
{
- struct btrfs_node *src = &src_buf->node;
- struct btrfs_node *dst = &dst_buf->node;
+ struct btrfs_node *src = btrfs_buffer_node(src_buf);
+ struct btrfs_node *dst = btrfs_buffer_node(dst_buf);
int push_items = 0;
int src_nritems;
int dst_nritems;
if (src_nritems < push_items)
push_items = src_nritems;
- memcpy(dst->ptrs + dst_nritems, src->ptrs,
- push_items * sizeof(struct btrfs_key_ptr));
+ btrfs_memcpy(root, dst, dst->ptrs + dst_nritems, src->ptrs,
+ push_items * sizeof(struct btrfs_key_ptr));
if (push_items < src_nritems) {
- memmove(src->ptrs, src->ptrs + push_items,
+ btrfs_memmove(root, src, src->ptrs, src->ptrs + push_items,
(src_nritems - push_items) *
sizeof(struct btrfs_key_ptr));
}
btrfs_set_header_nritems(&src->header, src_nritems - push_items);
btrfs_set_header_nritems(&dst->header, dst_nritems + push_items);
- BUG_ON(list_empty(&src_buf->dirty));
- BUG_ON(list_empty(&dst_buf->dirty));
+ btrfs_mark_buffer_dirty(src_buf);
+ btrfs_mark_buffer_dirty(dst_buf);
return ret;
}
* this will only push up to 1/2 the contents of the left node over
*/
static int balance_node_right(struct btrfs_trans_handle *trans, struct
- btrfs_root *root, struct btrfs_buffer *dst_buf,
- struct btrfs_buffer *src_buf)
+ btrfs_root *root, struct buffer_head *dst_buf,
+ struct buffer_head *src_buf)
{
- struct btrfs_node *src = &src_buf->node;
- struct btrfs_node *dst = &dst_buf->node;
+ struct btrfs_node *src = btrfs_buffer_node(src_buf);
+ struct btrfs_node *dst = btrfs_buffer_node(dst_buf);
int push_items = 0;
int max_push;
int src_nritems;
if (max_push < push_items)
push_items = max_push;
- memmove(dst->ptrs + push_items, dst->ptrs,
- dst_nritems * sizeof(struct btrfs_key_ptr));
- memcpy(dst->ptrs, src->ptrs + src_nritems - push_items,
- push_items * sizeof(struct btrfs_key_ptr));
+ btrfs_memmove(root, dst, dst->ptrs + push_items, dst->ptrs,
+ dst_nritems * sizeof(struct btrfs_key_ptr));
+
+ btrfs_memcpy(root, dst, dst->ptrs,
+ src->ptrs + src_nritems - push_items,
+ push_items * sizeof(struct btrfs_key_ptr));
btrfs_set_header_nritems(&src->header, src_nritems - push_items);
btrfs_set_header_nritems(&dst->header, dst_nritems + push_items);
- BUG_ON(list_empty(&src_buf->dirty));
- BUG_ON(list_empty(&dst_buf->dirty));
+ btrfs_mark_buffer_dirty(src_buf);
+ btrfs_mark_buffer_dirty(dst_buf);
return ret;
}
static int insert_new_root(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, int level)
{
- struct btrfs_buffer *t;
+ struct buffer_head *t;
struct btrfs_node *lower;
struct btrfs_node *c;
struct btrfs_disk_key *lower_key;
BUG_ON(path->nodes[level-1] != root->node);
t = btrfs_alloc_free_block(trans, root);
- c = &t->node;
+ c = btrfs_buffer_node(t);
memset(c, 0, root->blocksize);
btrfs_set_header_nritems(&c->header, 1);
btrfs_set_header_level(&c->header, level);
- btrfs_set_header_blocknr(&c->header, t->blocknr);
- btrfs_set_header_parentid(&c->header,
- btrfs_header_parentid(&root->node->node.header));
- lower = &path->nodes[level-1]->node;
+ btrfs_set_header_blocknr(&c->header, bh_blocknr(t));
+ btrfs_set_header_generation(&c->header, trans->transid);
+ btrfs_set_header_owner(&c->header, root->root_key.objectid);
+ lower = btrfs_buffer_node(path->nodes[level-1]);
+ memcpy(c->header.fsid, root->fs_info->disk_super->fsid,
+ sizeof(c->header.fsid));
if (btrfs_is_leaf(lower))
lower_key = &((struct btrfs_leaf *)lower)->items[0].key;
else
lower_key = &lower->ptrs[0].key;
- memcpy(&c->ptrs[0].key, lower_key, sizeof(struct btrfs_disk_key));
- btrfs_set_node_blockptr(c, 0, path->nodes[level - 1]->blocknr);
+ btrfs_memcpy(root, c, &c->ptrs[0].key, lower_key,
+ sizeof(struct btrfs_disk_key));
+ btrfs_set_node_blockptr(c, 0, bh_blocknr(path->nodes[level - 1]));
+
+ btrfs_mark_buffer_dirty(t);
+
/* the super has an extra ref to root->node */
btrfs_block_release(root, root->node);
root->node = t;
- t->count++;
+ get_bh(t);
path->nodes[level] = t;
path->slots[level] = 0;
return 0;
int nritems;
BUG_ON(!path->nodes[level]);
- lower = &path->nodes[level]->node;
+ lower = btrfs_buffer_node(path->nodes[level]);
nritems = btrfs_header_nritems(&lower->header);
if (slot > nritems)
BUG();
if (nritems == BTRFS_NODEPTRS_PER_BLOCK(root))
BUG();
if (slot != nritems) {
- memmove(lower->ptrs + slot + 1, lower->ptrs + slot,
- (nritems - slot) * sizeof(struct btrfs_key_ptr));
+ btrfs_memmove(root, lower, lower->ptrs + slot + 1,
+ lower->ptrs + slot,
+ (nritems - slot) * sizeof(struct btrfs_key_ptr));
}
- memcpy(&lower->ptrs[slot].key, key, sizeof(struct btrfs_disk_key));
+ btrfs_memcpy(root, lower, &lower->ptrs[slot].key,
+ key, sizeof(struct btrfs_disk_key));
btrfs_set_node_blockptr(lower, slot, blocknr);
btrfs_set_header_nritems(&lower->header, nritems + 1);
- BUG_ON(list_empty(&path->nodes[level]->dirty));
+ btrfs_mark_buffer_dirty(path->nodes[level]);
return 0;
}
static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, int level)
{
- struct btrfs_buffer *t;
+ struct buffer_head *t;
struct btrfs_node *c;
- struct btrfs_buffer *split_buffer;
+ struct buffer_head *split_buffer;
struct btrfs_node *split;
int mid;
int ret;
u32 c_nritems;
t = path->nodes[level];
- c = &t->node;
+ c = btrfs_buffer_node(t);
if (t == root->node) {
/* trying to split the root, lets make a new one */
ret = insert_new_root(trans, root, path, level + 1);
if (ret)
return ret;
+ } else {
+ ret = push_nodes_for_insert(trans, root, path, level);
+ t = path->nodes[level];
+ c = btrfs_buffer_node(t);
+ if (!ret &&
+ btrfs_header_nritems(&c->header) <
+ BTRFS_NODEPTRS_PER_BLOCK(root) - 1)
+ return 0;
}
+
c_nritems = btrfs_header_nritems(&c->header);
split_buffer = btrfs_alloc_free_block(trans, root);
- split = &split_buffer->node;
+ split = btrfs_buffer_node(split_buffer);
btrfs_set_header_flags(&split->header, btrfs_header_flags(&c->header));
- btrfs_set_header_blocknr(&split->header, split_buffer->blocknr);
- btrfs_set_header_parentid(&split->header,
- btrfs_header_parentid(&root->node->node.header));
+ btrfs_set_header_level(&split->header, btrfs_header_level(&c->header));
+ btrfs_set_header_blocknr(&split->header, bh_blocknr(split_buffer));
+ btrfs_set_header_generation(&split->header, trans->transid);
+ btrfs_set_header_owner(&split->header, root->root_key.objectid);
+ memcpy(split->header.fsid, root->fs_info->disk_super->fsid,
+ sizeof(split->header.fsid));
mid = (c_nritems + 1) / 2;
- memcpy(split->ptrs, c->ptrs + mid,
- (c_nritems - mid) * sizeof(struct btrfs_key_ptr));
+ btrfs_memcpy(root, split, split->ptrs, c->ptrs + mid,
+ (c_nritems - mid) * sizeof(struct btrfs_key_ptr));
btrfs_set_header_nritems(&split->header, c_nritems - mid);
btrfs_set_header_nritems(&c->header, mid);
ret = 0;
- BUG_ON(list_empty(&t->dirty));
+ btrfs_mark_buffer_dirty(t);
+ btrfs_mark_buffer_dirty(split_buffer);
wret = insert_ptr(trans, root, path, &split->ptrs[0].key,
- split_buffer->blocknr, path->slots[level + 1] + 1,
+ bh_blocknr(split_buffer), path->slots[level + 1] + 1,
level + 1);
if (wret)
ret = wret;
static int leaf_space_used(struct btrfs_leaf *l, int start, int nr)
{
int data_len;
- int end = start + nr - 1;
+ int nritems = btrfs_header_nritems(&l->header);
+ int end = min(nritems, start + nr) - 1;
if (!nr)
return 0;
data_len = btrfs_item_end(l->items + start);
data_len = data_len - btrfs_item_offset(l->items + end);
data_len += sizeof(struct btrfs_item) * nr;
+ WARN_ON(data_len < 0);
return data_len;
}
+/*
+ * The space between the end of the leaf items and
+ * the start of the leaf data. IOW, how much room
+ * the leaf has left for both items and data
+ */
+int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf)
+{
+ int nritems = btrfs_header_nritems(&leaf->header);
+ return BTRFS_LEAF_DATA_SIZE(root) - leaf_space_used(leaf, 0, nritems);
+}
+
/*
* push some data in the path leaf to the right, trying to free up at
* least data_size bytes. returns zero if the push worked, nonzero otherwise
static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, int data_size)
{
- struct btrfs_buffer *left_buf = path->nodes[0];
- struct btrfs_leaf *left = &left_buf->leaf;
+ struct buffer_head *left_buf = path->nodes[0];
+ struct btrfs_leaf *left = btrfs_buffer_leaf(left_buf);
struct btrfs_leaf *right;
- struct btrfs_buffer *right_buf;
- struct btrfs_buffer *upper;
+ struct buffer_head *right_buf;
+ struct buffer_head *upper;
+ struct btrfs_node *upper_node;
int slot;
int i;
int free_space;
return 1;
}
upper = path->nodes[1];
- if (slot >= btrfs_header_nritems(&upper->node.header) - 1) {
+ upper_node = btrfs_buffer_node(upper);
+ if (slot >= btrfs_header_nritems(&upper_node->header) - 1) {
return 1;
}
- right_buf = read_tree_block(root, btrfs_node_blockptr(&upper->node,
- slot + 1));
- right = &right_buf->leaf;
+ right_buf = read_tree_block(root,
+ btrfs_node_blockptr(btrfs_buffer_node(upper), slot + 1));
+ right = btrfs_buffer_leaf(right_buf);
free_space = btrfs_leaf_free_space(root, right);
if (free_space < data_size + sizeof(struct btrfs_item)) {
btrfs_block_release(root, right_buf);
}
/* cow and double check */
btrfs_cow_block(trans, root, right_buf, upper, slot + 1, &right_buf);
- right = &right_buf->leaf;
+ right = btrfs_buffer_leaf(right_buf);
free_space = btrfs_leaf_free_space(root, right);
if (free_space < data_size + sizeof(struct btrfs_item)) {
btrfs_block_release(root, right_buf);
}
left_nritems = btrfs_header_nritems(&left->header);
- for (i = left_nritems - 1; i >= 0; i--) {
+ if (left_nritems == 0) {
+ btrfs_block_release(root, right_buf);
+ return 1;
+ }
+ for (i = left_nritems - 1; i >= 1; i--) {
item = left->items + i;
if (path->slots[0] == i)
push_space += data_size + sizeof(*item);
btrfs_block_release(root, right_buf);
return 1;
}
+ if (push_items == left_nritems)
+ WARN_ON(1);
right_nritems = btrfs_header_nritems(&right->header);
/* push left to right */
push_space = btrfs_item_end(left->items + left_nritems - push_items);
push_space -= leaf_data_end(root, left);
/* make room in the right data area */
- memmove(btrfs_leaf_data(right) + leaf_data_end(root, right) -
- push_space, btrfs_leaf_data(right) + leaf_data_end(root, right),
- BTRFS_LEAF_DATA_SIZE(root) - leaf_data_end(root, right));
+ btrfs_memmove(root, right, btrfs_leaf_data(right) +
+ leaf_data_end(root, right) - push_space,
+ btrfs_leaf_data(right) +
+ leaf_data_end(root, right), BTRFS_LEAF_DATA_SIZE(root) -
+ leaf_data_end(root, right));
/* copy from the left data area */
- memcpy(btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) - push_space,
- btrfs_leaf_data(left) + leaf_data_end(root, left), push_space);
- memmove(right->items + push_items, right->items,
+ btrfs_memcpy(root, right, btrfs_leaf_data(right) +
+ BTRFS_LEAF_DATA_SIZE(root) - push_space,
+ btrfs_leaf_data(left) + leaf_data_end(root, left),
+ push_space);
+ btrfs_memmove(root, right, right->items + push_items, right->items,
right_nritems * sizeof(struct btrfs_item));
/* copy the items from left to right */
- memcpy(right->items, left->items + left_nritems - push_items,
- push_items * sizeof(struct btrfs_item));
+ btrfs_memcpy(root, right, right->items, left->items +
+ left_nritems - push_items,
+ push_items * sizeof(struct btrfs_item));
/* update the item pointers */
right_nritems += push_items;
left_nritems -= push_items;
btrfs_set_header_nritems(&left->header, left_nritems);
- BUG_ON(list_empty(&left_buf->dirty));
- BUG_ON(list_empty(&right_buf->dirty));
- memcpy(&upper->node.ptrs[slot + 1].key,
+ btrfs_mark_buffer_dirty(left_buf);
+ btrfs_mark_buffer_dirty(right_buf);
+
+ btrfs_memcpy(root, upper_node, &upper_node->ptrs[slot + 1].key,
&right->items[0].key, sizeof(struct btrfs_disk_key));
- BUG_ON(list_empty(&upper->dirty));
+ btrfs_mark_buffer_dirty(upper);
/* then fixup the leaf pointer in the path */
if (path->slots[0] >= left_nritems) {
static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, int data_size)
{
- struct btrfs_buffer *right_buf = path->nodes[0];
- struct btrfs_leaf *right = &right_buf->leaf;
- struct btrfs_buffer *t;
+ struct buffer_head *right_buf = path->nodes[0];
+ struct btrfs_leaf *right = btrfs_buffer_leaf(right_buf);
+ struct buffer_head *t;
struct btrfs_leaf *left;
int slot;
int i;
if (!path->nodes[1]) {
return 1;
}
- t = read_tree_block(root, btrfs_node_blockptr(&path->nodes[1]->node,
- slot - 1));
- left = &t->leaf;
+ t = read_tree_block(root,
+ btrfs_node_blockptr(btrfs_buffer_node(path->nodes[1]), slot - 1));
+ left = btrfs_buffer_leaf(t);
free_space = btrfs_leaf_free_space(root, left);
if (free_space < data_size + sizeof(struct btrfs_item)) {
btrfs_block_release(root, t);
/* cow and double check */
btrfs_cow_block(trans, root, t, path->nodes[1], slot - 1, &t);
- left = &t->leaf;
+ left = btrfs_buffer_leaf(t);
free_space = btrfs_leaf_free_space(root, left);
if (free_space < data_size + sizeof(struct btrfs_item)) {
btrfs_block_release(root, t);
return 1;
}
- for (i = 0; i < btrfs_header_nritems(&right->header); i++) {
+ if (btrfs_header_nritems(&right->header) == 0) {
+ btrfs_block_release(root, t);
+ return 1;
+ }
+
+ for (i = 0; i < btrfs_header_nritems(&right->header) - 1; i++) {
item = right->items + i;
if (path->slots[0] == i)
push_space += data_size + sizeof(*item);
btrfs_block_release(root, t);
return 1;
}
+ if (push_items == btrfs_header_nritems(&right->header))
+ WARN_ON(1);
/* push data from right to left */
- memcpy(left->items + btrfs_header_nritems(&left->header),
- right->items, push_items * sizeof(struct btrfs_item));
+ btrfs_memcpy(root, left, left->items +
+ btrfs_header_nritems(&left->header),
+ right->items, push_items * sizeof(struct btrfs_item));
push_space = BTRFS_LEAF_DATA_SIZE(root) -
btrfs_item_offset(right->items + push_items -1);
- memcpy(btrfs_leaf_data(left) + leaf_data_end(root, left) - push_space,
- btrfs_leaf_data(right) +
- btrfs_item_offset(right->items + push_items - 1),
- push_space);
+ btrfs_memcpy(root, left, btrfs_leaf_data(left) +
+ leaf_data_end(root, left) - push_space,
+ btrfs_leaf_data(right) +
+ btrfs_item_offset(right->items + push_items - 1),
+ push_space);
old_left_nritems = btrfs_header_nritems(&left->header);
BUG_ON(old_left_nritems < 0);
/* fixup right node */
push_space = btrfs_item_offset(right->items + push_items - 1) -
leaf_data_end(root, right);
- memmove(btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) -
- push_space, btrfs_leaf_data(right) +
- leaf_data_end(root, right), push_space);
- memmove(right->items, right->items + push_items,
+ btrfs_memmove(root, right, btrfs_leaf_data(right) +
+ BTRFS_LEAF_DATA_SIZE(root) - push_space,
+ btrfs_leaf_data(right) +
+ leaf_data_end(root, right), push_space);
+ btrfs_memmove(root, right, right->items, right->items + push_items,
(btrfs_header_nritems(&right->header) - push_items) *
sizeof(struct btrfs_item));
btrfs_set_header_nritems(&right->header,
push_space = btrfs_item_offset(right->items + i);
}
- BUG_ON(list_empty(&t->dirty));
- BUG_ON(list_empty(&right_buf->dirty));
-
+ btrfs_mark_buffer_dirty(t);
+ btrfs_mark_buffer_dirty(right_buf);
wret = fixup_low_keys(trans, root, path, &right->items[0].key, 1);
if (wret)
ret = wret;
* returns 0 if all went well and < 0 on failure.
*/
static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct btrfs_path *path, int data_size)
+ *root, struct btrfs_key *ins_key,
+ struct btrfs_path *path, int data_size)
{
- struct btrfs_buffer *l_buf;
+ struct buffer_head *l_buf;
struct btrfs_leaf *l;
u32 nritems;
int mid;
int slot;
struct btrfs_leaf *right;
- struct btrfs_buffer *right_buffer;
+ struct buffer_head *right_buffer;
int space_needed = data_size + sizeof(struct btrfs_item);
int data_copy_size;
int rt_data_off;
int i;
- int ret;
+ int ret = 0;
int wret;
+ int double_split = 0;
+ struct btrfs_disk_key disk_key;
+ /* first try to make some room by pushing left and right */
wret = push_leaf_left(trans, root, path, data_size);
if (wret < 0)
return wret;
return wret;
}
l_buf = path->nodes[0];
- l = &l_buf->leaf;
+ l = btrfs_buffer_leaf(l_buf);
/* did the pushes work? */
if (btrfs_leaf_free_space(root, l) >=
mid = (nritems + 1)/ 2;
right_buffer = btrfs_alloc_free_block(trans, root);
BUG_ON(!right_buffer);
- BUG_ON(mid == nritems);
- right = &right_buffer->leaf;
+ right = btrfs_buffer_leaf(right_buffer);
memset(&right->header, 0, sizeof(right->header));
+ btrfs_set_header_blocknr(&right->header, bh_blocknr(right_buffer));
+ btrfs_set_header_generation(&right->header, trans->transid);
+ btrfs_set_header_owner(&right->header, root->root_key.objectid);
+ btrfs_set_header_level(&right->header, 0);
+ memcpy(right->header.fsid, root->fs_info->disk_super->fsid,
+ sizeof(right->header.fsid));
if (mid <= slot) {
- /* FIXME, just alloc a new leaf here */
- if (leaf_space_used(l, mid, nritems - mid) + space_needed >
- BTRFS_LEAF_DATA_SIZE(root))
- BUG();
+ if (nritems == 1 ||
+ leaf_space_used(l, mid, nritems - mid) + space_needed >
+ BTRFS_LEAF_DATA_SIZE(root)) {
+ if (slot >= nritems) {
+ btrfs_cpu_key_to_disk(&disk_key, ins_key);
+ btrfs_set_header_nritems(&right->header, 0);
+ wret = insert_ptr(trans, root, path,
+ &disk_key,
+ bh_blocknr(right_buffer),
+ path->slots[1] + 1, 1);
+ if (wret)
+ ret = wret;
+ btrfs_block_release(root, path->nodes[0]);
+ path->nodes[0] = right_buffer;
+ path->slots[0] = 0;
+ path->slots[1] += 1;
+ return ret;
+ }
+ mid = slot;
+ double_split = 1;
+ }
} else {
- /* FIXME, just alloc a new leaf here */
if (leaf_space_used(l, 0, mid + 1) + space_needed >
- BTRFS_LEAF_DATA_SIZE(root))
- BUG();
+ BTRFS_LEAF_DATA_SIZE(root)) {
+ if (slot == 0) {
+ btrfs_cpu_key_to_disk(&disk_key, ins_key);
+ btrfs_set_header_nritems(&right->header, 0);
+ wret = insert_ptr(trans, root, path,
+ &disk_key,
+ bh_blocknr(right_buffer),
+ path->slots[1] - 1, 1);
+ if (wret)
+ ret = wret;
+ btrfs_block_release(root, path->nodes[0]);
+ path->nodes[0] = right_buffer;
+ path->slots[0] = 0;
+ path->slots[1] -= 1;
+ if (path->slots[1] == 0) {
+ wret = fixup_low_keys(trans, root,
+ path, &disk_key, 1);
+ if (wret)
+ ret = wret;
+ }
+ return ret;
+ }
+ mid = slot;
+ double_split = 1;
+ }
}
btrfs_set_header_nritems(&right->header, nritems - mid);
- btrfs_set_header_blocknr(&right->header, right_buffer->blocknr);
- btrfs_set_header_level(&right->header, 0);
- btrfs_set_header_parentid(&right->header,
- btrfs_header_parentid(&root->node->node.header));
data_copy_size = btrfs_item_end(l->items + mid) -
leaf_data_end(root, l);
- memcpy(right->items, l->items + mid,
- (nritems - mid) * sizeof(struct btrfs_item));
- memcpy(btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) -
- data_copy_size, btrfs_leaf_data(l) +
- leaf_data_end(root, l), data_copy_size);
+ btrfs_memcpy(root, right, right->items, l->items + mid,
+ (nritems - mid) * sizeof(struct btrfs_item));
+ btrfs_memcpy(root, right,
+ btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) -
+ data_copy_size, btrfs_leaf_data(l) +
+ leaf_data_end(root, l), data_copy_size);
rt_data_off = BTRFS_LEAF_DATA_SIZE(root) -
btrfs_item_end(l->items + mid);
btrfs_set_header_nritems(&l->header, mid);
ret = 0;
wret = insert_ptr(trans, root, path, &right->items[0].key,
- right_buffer->blocknr, path->slots[1] + 1, 1);
+ bh_blocknr(right_buffer), path->slots[1] + 1, 1);
if (wret)
ret = wret;
- BUG_ON(list_empty(&right_buffer->dirty));
- BUG_ON(list_empty(&l_buf->dirty));
+ btrfs_mark_buffer_dirty(right_buffer);
+ btrfs_mark_buffer_dirty(l_buf);
BUG_ON(path->slots[0] != slot);
if (mid <= slot) {
btrfs_block_release(root, path->nodes[0]);
} else
btrfs_block_release(root, right_buffer);
BUG_ON(path->slots[0] < 0);
+
+ if (!double_split)
+ return ret;
+ right_buffer = btrfs_alloc_free_block(trans, root);
+ BUG_ON(!right_buffer);
+ right = btrfs_buffer_leaf(right_buffer);
+ memset(&right->header, 0, sizeof(right->header));
+ btrfs_set_header_blocknr(&right->header, bh_blocknr(right_buffer));
+ btrfs_set_header_generation(&right->header, trans->transid);
+ btrfs_set_header_owner(&right->header, root->root_key.objectid);
+ btrfs_set_header_level(&right->header, 0);
+ memcpy(right->header.fsid, root->fs_info->disk_super->fsid,
+ sizeof(right->header.fsid));
+ btrfs_cpu_key_to_disk(&disk_key, ins_key);
+ btrfs_set_header_nritems(&right->header, 0);
+ wret = insert_ptr(trans, root, path,
+ &disk_key,
+ bh_blocknr(right_buffer),
+ path->slots[1], 1);
+ if (wret)
+ ret = wret;
+ if (path->slots[1] == 0) {
+ wret = fixup_low_keys(trans, root, path, &disk_key, 1);
+ if (wret)
+ ret = wret;
+ }
+ btrfs_block_release(root, path->nodes[0]);
+ path->nodes[0] = right_buffer;
+ path->slots[0] = 0;
+ check_node(root, path, 1);
+ check_leaf(root, path, 0);
+ return ret;
+}
+
+int btrfs_truncate_item(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path,
+ u32 new_size)
+{
+ int ret = 0;
+ int slot;
+ int slot_orig;
+ struct btrfs_leaf *leaf;
+ struct buffer_head *leaf_buf;
+ u32 nritems;
+ unsigned int data_end;
+ unsigned int old_data_start;
+ unsigned int old_size;
+ unsigned int size_diff;
+ int i;
+
+ slot_orig = path->slots[0];
+ leaf_buf = path->nodes[0];
+ leaf = btrfs_buffer_leaf(leaf_buf);
+
+ nritems = btrfs_header_nritems(&leaf->header);
+ data_end = leaf_data_end(root, leaf);
+
+ slot = path->slots[0];
+ old_data_start = btrfs_item_offset(leaf->items + slot);
+ old_size = btrfs_item_size(leaf->items + slot);
+ BUG_ON(old_size <= new_size);
+ size_diff = old_size - new_size;
+
+ BUG_ON(slot < 0);
+ BUG_ON(slot >= nritems);
+
+ /*
+ * item0..itemN ... dataN.offset..dataN.size .. data0.size
+ */
+ /* first correct the data pointers */
+ for (i = slot; i < nritems; i++) {
+ u32 ioff = btrfs_item_offset(leaf->items + i);
+ btrfs_set_item_offset(leaf->items + i,
+ ioff + size_diff);
+ }
+ /* shift the data */
+ btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) +
+ data_end + size_diff, btrfs_leaf_data(leaf) +
+ data_end, old_data_start + new_size - data_end);
+ btrfs_set_item_size(leaf->items + slot, new_size);
+ btrfs_mark_buffer_dirty(leaf_buf);
+
+ ret = 0;
+ if (btrfs_leaf_free_space(root, leaf) < 0)
+ BUG();
+ check_leaf(root, path, 0);
+ return ret;
+}
+
+int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
+ *root, struct btrfs_path *path, u32 data_size)
+{
+ int ret = 0;
+ int slot;
+ int slot_orig;
+ struct btrfs_leaf *leaf;
+ struct buffer_head *leaf_buf;
+ u32 nritems;
+ unsigned int data_end;
+ unsigned int old_data;
+ unsigned int old_size;
+ int i;
+
+ slot_orig = path->slots[0];
+ leaf_buf = path->nodes[0];
+ leaf = btrfs_buffer_leaf(leaf_buf);
+
+ nritems = btrfs_header_nritems(&leaf->header);
+ data_end = leaf_data_end(root, leaf);
+
+ if (btrfs_leaf_free_space(root, leaf) < data_size)
+ BUG();
+ slot = path->slots[0];
+ old_data = btrfs_item_end(leaf->items + slot);
+
+ BUG_ON(slot < 0);
+ BUG_ON(slot >= nritems);
+
+ /*
+ * item0..itemN ... dataN.offset..dataN.size .. data0.size
+ */
+ /* first correct the data pointers */
+ for (i = slot; i < nritems; i++) {
+ u32 ioff = btrfs_item_offset(leaf->items + i);
+ btrfs_set_item_offset(leaf->items + i,
+ ioff - data_size);
+ }
+ /* shift the data */
+ btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) +
+ data_end - data_size, btrfs_leaf_data(leaf) +
+ data_end, old_data - data_end);
+ data_end = old_data;
+ old_size = btrfs_item_size(leaf->items + slot);
+ btrfs_set_item_size(leaf->items + slot, old_size + data_size);
+ btrfs_mark_buffer_dirty(leaf_buf);
+
+ ret = 0;
+ if (btrfs_leaf_free_space(root, leaf) < 0)
+ BUG();
+ check_leaf(root, path, 0);
return ret;
}
int slot;
int slot_orig;
struct btrfs_leaf *leaf;
- struct btrfs_buffer *leaf_buf;
+ struct buffer_head *leaf_buf;
u32 nritems;
unsigned int data_end;
struct btrfs_disk_key disk_key;
BUG();
ret = btrfs_search_slot(trans, root, cpu_key, path, data_size, 1);
if (ret == 0) {
- btrfs_release_path(root, path);
return -EEXIST;
}
if (ret < 0)
slot_orig = path->slots[0];
leaf_buf = path->nodes[0];
- leaf = &leaf_buf->leaf;
+ leaf = btrfs_buffer_leaf(leaf_buf);
nritems = btrfs_header_nritems(&leaf->header);
data_end = leaf_data_end(root, leaf);
if (btrfs_leaf_free_space(root, leaf) <
- sizeof(struct btrfs_item) + data_size)
+ sizeof(struct btrfs_item) + data_size) {
BUG();
-
+ }
slot = path->slots[0];
BUG_ON(slot < 0);
if (slot != nritems) {
}
/* shift the items */
- memmove(leaf->items + slot + 1, leaf->items + slot,
- (nritems - slot) * sizeof(struct btrfs_item));
+ btrfs_memmove(root, leaf, leaf->items + slot + 1,
+ leaf->items + slot,
+ (nritems - slot) * sizeof(struct btrfs_item));
/* shift the data */
- memmove(btrfs_leaf_data(leaf) + data_end - data_size,
- btrfs_leaf_data(leaf) +
- data_end, old_data - data_end);
+ btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) +
+ data_end - data_size, btrfs_leaf_data(leaf) +
+ data_end, old_data - data_end);
data_end = old_data;
}
/* setup the item for the new data */
- memcpy(&leaf->items[slot].key, &disk_key,
- sizeof(struct btrfs_disk_key));
+ btrfs_memcpy(root, leaf, &leaf->items[slot].key, &disk_key,
+ sizeof(struct btrfs_disk_key));
btrfs_set_item_offset(leaf->items + slot, data_end - data_size);
btrfs_set_item_size(leaf->items + slot, data_size);
btrfs_set_header_nritems(&leaf->header, nritems + 1);
+ btrfs_mark_buffer_dirty(leaf_buf);
ret = 0;
if (slot == 0)
ret = fixup_low_keys(trans, root, path, &disk_key, 1);
- BUG_ON(list_empty(&leaf_buf->dirty));
if (btrfs_leaf_free_space(root, leaf) < 0)
BUG();
check_leaf(root, path, 0);
data_size)
{
int ret = 0;
- struct btrfs_path path;
+ struct btrfs_path *path;
u8 *ptr;
- btrfs_init_path(&path);
- ret = btrfs_insert_empty_item(trans, root, &path, cpu_key, data_size);
+ path = btrfs_alloc_path();
+ BUG_ON(!path);
+ btrfs_init_path(path);
+ ret = btrfs_insert_empty_item(trans, root, path, cpu_key, data_size);
if (!ret) {
- ptr = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0], u8);
- memcpy(ptr, data, data_size);
+ ptr = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
+ path->slots[0], u8);
+ btrfs_memcpy(root, path->nodes[0]->b_data,
+ ptr, data, data_size);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
}
- btrfs_release_path(root, &path);
+ btrfs_release_path(root, path);
+ btrfs_free_path(path);
return ret;
}
struct btrfs_path *path, int level, int slot)
{
struct btrfs_node *node;
- struct btrfs_buffer *parent = path->nodes[level];
+ struct buffer_head *parent = path->nodes[level];
u32 nritems;
int ret = 0;
int wret;
- node = &parent->node;
+ node = btrfs_buffer_node(parent);
nritems = btrfs_header_nritems(&node->header);
if (slot != nritems -1) {
- memmove(node->ptrs + slot, node->ptrs + slot + 1,
- sizeof(struct btrfs_key_ptr) * (nritems - slot - 1));
+ btrfs_memmove(root, node, node->ptrs + slot,
+ node->ptrs + slot + 1,
+ sizeof(struct btrfs_key_ptr) *
+ (nritems - slot - 1));
}
nritems--;
btrfs_set_header_nritems(&node->header, nritems);
if (nritems == 0 && parent == root->node) {
- BUG_ON(btrfs_header_level(&root->node->node.header) != 1);
+ struct btrfs_header *header = btrfs_buffer_header(root->node);
+ BUG_ON(btrfs_header_level(header) != 1);
/* just turn the root into a leaf and break */
- btrfs_set_header_level(&root->node->node.header, 0);
+ btrfs_set_header_level(header, 0);
} else if (slot == 0) {
wret = fixup_low_keys(trans, root, path, &node->ptrs[0].key,
level + 1);
if (wret)
ret = wret;
}
- BUG_ON(list_empty(&parent->dirty));
+ btrfs_mark_buffer_dirty(parent);
return ret;
}
{
int slot;
struct btrfs_leaf *leaf;
- struct btrfs_buffer *leaf_buf;
+ struct buffer_head *leaf_buf;
int doff;
int dsize;
int ret = 0;
u32 nritems;
leaf_buf = path->nodes[0];
- leaf = &leaf_buf->leaf;
+ leaf = btrfs_buffer_leaf(leaf_buf);
slot = path->slots[0];
doff = btrfs_item_offset(leaf->items + slot);
dsize = btrfs_item_size(leaf->items + slot);
if (slot != nritems - 1) {
int i;
int data_end = leaf_data_end(root, leaf);
- memmove(btrfs_leaf_data(leaf) + data_end + dsize,
- btrfs_leaf_data(leaf) + data_end,
- doff - data_end);
+ btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) +
+ data_end + dsize,
+ btrfs_leaf_data(leaf) + data_end,
+ doff - data_end);
for (i = slot + 1; i < nritems; i++) {
u32 ioff = btrfs_item_offset(leaf->items + i);
btrfs_set_item_offset(leaf->items + i, ioff + dsize);
}
- memmove(leaf->items + slot, leaf->items + slot + 1,
- sizeof(struct btrfs_item) *
- (nritems - slot - 1));
+ btrfs_memmove(root, leaf, leaf->items + slot,
+ leaf->items + slot + 1,
+ sizeof(struct btrfs_item) *
+ (nritems - slot - 1));
}
btrfs_set_header_nritems(&leaf->header, nritems - 1);
nritems--;
if (nritems == 0) {
if (leaf_buf == root->node) {
btrfs_set_header_level(&leaf->header, 0);
- BUG_ON(list_empty(&leaf_buf->dirty));
} else {
clean_tree_block(trans, root, leaf_buf);
+ wait_on_buffer(leaf_buf);
wret = del_ptr(trans, root, path, 1, path->slots[1]);
if (wret)
ret = wret;
wret = btrfs_free_extent(trans, root,
- leaf_buf->blocknr, 1, 1);
+ bh_blocknr(leaf_buf), 1, 1);
if (wret)
ret = wret;
}
if (wret)
ret = wret;
}
- BUG_ON(list_empty(&leaf_buf->dirty));
/* delete the leaf if it is mostly empty */
if (used < BTRFS_LEAF_DATA_SIZE(root) / 3) {
* for possible call to del_ptr below
*/
slot = path->slots[1];
- leaf_buf->count++;
+ get_bh(leaf_buf);
wret = push_leaf_left(trans, root, path, 1);
if (wret < 0)
ret = wret;
ret = wret;
}
if (btrfs_header_nritems(&leaf->header) == 0) {
- u64 blocknr = leaf_buf->blocknr;
+ u64 blocknr = bh_blocknr(leaf_buf);
clean_tree_block(trans, root, leaf_buf);
+ wait_on_buffer(leaf_buf);
wret = del_ptr(trans, root, path, 1, slot);
if (wret)
ret = wret;
if (wret)
ret = wret;
} else {
+ btrfs_mark_buffer_dirty(leaf_buf);
btrfs_block_release(root, leaf_buf);
}
+ } else {
+ btrfs_mark_buffer_dirty(leaf_buf);
}
}
return ret;
int slot;
int level = 1;
u64 blocknr;
- struct btrfs_buffer *c;
- struct btrfs_buffer *next = NULL;
+ struct buffer_head *c;
+ struct btrfs_node *c_node;
+ struct buffer_head *next = NULL;
while(level < BTRFS_MAX_LEVEL) {
if (!path->nodes[level])
return 1;
slot = path->slots[level] + 1;
c = path->nodes[level];
- if (slot >= btrfs_header_nritems(&c->node.header)) {
+ c_node = btrfs_buffer_node(c);
+ if (slot >= btrfs_header_nritems(&c_node->header)) {
level++;
continue;
}
- blocknr = btrfs_node_blockptr(&c->node, slot);
+ blocknr = btrfs_node_blockptr(c_node, slot);
if (next)
btrfs_block_release(root, next);
next = read_tree_block(root, blocknr);
if (!level)
break;
next = read_tree_block(root,
- btrfs_node_blockptr(&next->node, 0));
+ btrfs_node_blockptr(btrfs_buffer_node(next), 0));
}
return 0;
}
projects / deliverable / linux.git / blobdiff