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Btrfs: Allow tree blocks larger than the page size 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-10-15 16:15:53 -04:00
parent 1a5bc167f6
commit db94535db7
15 changed files with 738 additions and 497 deletions
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319
fs/btrfs/ctree.c
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@ -83,16 +83,15 @@ static int __btrfs_cow_block(struct btrfs_trans_handle *trans,
WARN_ON(root->ref_cows && trans->transid != root->last_trans);
cow = btrfs_alloc_free_block(trans, root, search_start, empty_size);
cow = btrfs_alloc_free_block(trans, root, buf->len,
search_start, empty_size);
if (IS_ERR(cow))
return PTR_ERR(cow);
cow->alloc_addr = (unsigned long)__builtin_return_address(0);
if (buf->len != root->sectorsize || cow->len != root->sectorsize)
WARN_ON(1);
copy_extent_buffer(cow, buf, 0, 0, cow->len);
btrfs_set_header_blocknr(cow, extent_buffer_blocknr(cow));
btrfs_set_header_bytenr(cow, cow->start);
btrfs_set_header_generation(cow, trans->transid);
btrfs_set_header_owner(cow, root->root_key.objectid);
@ -110,16 +109,16 @@ static int __btrfs_cow_block(struct btrfs_trans_handle *trans,
root->node = cow;
extent_buffer_get(cow);
if (buf != root->commit_root) {
btrfs_free_extent(trans, root,
extent_buffer_blocknr(buf), 1, 1);
btrfs_free_extent(trans, root, buf->start,
buf->len, 1);
}
free_extent_buffer(buf);
} else {
btrfs_set_node_blockptr(parent, parent_slot,
extent_buffer_blocknr(cow));
cow->start);
btrfs_mark_buffer_dirty(parent);
WARN_ON(btrfs_header_generation(parent) != trans->transid);
btrfs_free_extent(trans, root, extent_buffer_blocknr(buf),1,1);
btrfs_free_extent(trans, root, buf->start, buf->len, 1);
}
free_extent_buffer(buf);
btrfs_mark_buffer_dirty(cow);
@ -149,13 +148,14 @@ int btrfs_cow_block(struct btrfs_trans_handle *trans,
return 0;
}
search_start = extent_buffer_blocknr(buf) & ~((u64)65535);
search_start = buf->start & ~((u64)BTRFS_BLOCK_GROUP_SIZE - 1);
ret = __btrfs_cow_block(trans, root, buf, parent,
parent_slot, cow_ret, search_start, 0);
(*cow_ret)->alloc_addr = (unsigned long)__builtin_return_address(0);
return ret;
}
#if 0
static int close_blocks(u64 blocknr, u64 other)
{
if (blocknr < other && other - blocknr < 8)
@ -165,7 +165,6 @@ static int close_blocks(u64 blocknr, u64 other)
return 0;
}
#if 0
static int should_defrag_leaf(struct extent_buffer *eb)
{
return 0;
@ -355,7 +354,7 @@ static int check_node(struct btrfs_root *root, struct btrfs_path *path,
BUG_ON(memcmp(&parent_key, &node_key,
sizeof(struct btrfs_disk_key)));
BUG_ON(btrfs_node_blockptr(parent, parent_slot) !=
btrfs_header_blocknr(node));
btrfs_header_bytenr(node));
}
BUG_ON(nritems > BTRFS_NODEPTRS_PER_BLOCK(root));
if (slot != 0) {
@ -398,7 +397,7 @@ static int check_leaf(struct btrfs_root *root, struct btrfs_path *path,
BUG_ON(memcmp(&parent_key, &leaf_key,
sizeof(struct btrfs_disk_key)));
BUG_ON(btrfs_node_blockptr(parent, parent_slot) !=
btrfs_header_blocknr(leaf));
btrfs_header_bytenr(leaf));
}
#if 0
for (i = 0; nritems > 1 && i < nritems - 2; i++) {
@ -467,14 +466,16 @@ static int check_leaf(struct btrfs_root *root, struct btrfs_path *path,
static int check_block(struct btrfs_root *root, struct btrfs_path *path,
int level)
{
#if 0
struct extent_buffer *buf = path->nodes[level];
if (memcmp_extent_buffer(buf, root->fs_info->fsid,
(unsigned long)btrfs_header_fsid(buf),
BTRFS_FSID_SIZE)) {
printk("warning bad block %Lu\n", buf->start);
BUG();
return 1;
}
#endif
if (level == 0)
return check_leaf(root, path, level);
return check_node(root, path, level);
@ -585,7 +586,8 @@ static struct extent_buffer *read_node_slot(struct btrfs_root *root,
return NULL;
if (slot >= btrfs_header_nritems(parent))
return NULL;
return read_tree_block(root, btrfs_node_blockptr(parent, slot));
return read_tree_block(root, btrfs_node_blockptr(parent, slot),
btrfs_level_size(root, btrfs_header_level(parent) - 1));
}
static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
@ -618,7 +620,6 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
*/
if (!parent) {
struct extent_buffer *child;
u64 blocknr = extent_buffer_blocknr(mid);
if (btrfs_header_nritems(mid) != 1)
return 0;
@ -632,9 +633,10 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
wait_on_tree_block_writeback(root, mid);
/* once for the path */
free_extent_buffer(mid);
ret = btrfs_free_extent(trans, root, mid->start, mid->len, 1);
/* once for the root ptr */
free_extent_buffer(mid);
return btrfs_free_extent(trans, root, blocknr, 1, 1);
return ret;
}
if (btrfs_header_nritems(mid) >
BTRFS_NODEPTRS_PER_BLOCK(root) / 4)
@ -680,7 +682,9 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
if (wret < 0 && wret != -ENOSPC)
ret = wret;
if (btrfs_header_nritems(right) == 0) {
u64 blocknr = extent_buffer_blocknr(right);
u64 bytenr = right->start;
u32 blocksize = right->len;
clean_tree_block(trans, root, right);
wait_on_tree_block_writeback(root, right);
free_extent_buffer(right);
@ -689,7 +693,8 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
1);
if (wret)
ret = wret;
wret = btrfs_free_extent(trans, root, blocknr, 1, 1);
wret = btrfs_free_extent(trans, root, bytenr,
blocksize, 1);
if (wret)
ret = wret;
} else {
@ -719,7 +724,8 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
}
if (btrfs_header_nritems(mid) == 0) {
/* we've managed to empty the middle node, drop it */
u64 blocknr = extent_buffer_blocknr(mid);
u64 bytenr = mid->start;
u32 blocksize = mid->len;
clean_tree_block(trans, root, mid);
wait_on_tree_block_writeback(root, mid);
free_extent_buffer(mid);
@ -727,7 +733,7 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
wret = del_ptr(trans, root, path, level + 1, pslot);
if (wret)
ret = wret;
wret = btrfs_free_extent(trans, root, blocknr, 1, 1);
wret = btrfs_free_extent(trans, root, bytenr, blocksize, 1);
if (wret)
ret = wret;
} else {
@ -830,7 +836,6 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans,
path->slots[level] = orig_slot;
free_extent_buffer(left);
}
check_node(root, path, level);
return 0;
}
free_extent_buffer(left);
@ -874,12 +879,10 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans,
} else {
free_extent_buffer(right);
}
check_node(root, path, level);
return 0;
}
free_extent_buffer(right);
}
check_node(root, path, level);
return 1;
}
@ -889,19 +892,23 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans,
static void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
int level, int slot)
{
return;
#if 0
struct extent_buffer *node;
int i;
u32 nritems;
u64 blocknr;
u64 bytenr;
u64 search;
u64 cluster_start;
int ret;
int nread = 0;
int direction = path->reada;
int level;
struct radix_tree_root found;
unsigned long gang[8];
struct extent_buffer *eb;
if (level == 0)
return;
@ -918,8 +925,9 @@ static void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
init_bit_radix(&found);
nritems = btrfs_header_nritems(node);
level = btrfs_header_level(node) - 1;
for (i = slot; i < nritems; i++) {
blocknr = btrfs_node_blockptr(node, i);
bytenr = btrfs_node_blockptr(node, i);
set_radix_bit(&found, blocknr);
}
if (direction > 0) {
@ -944,6 +952,7 @@ static void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
}
}
}
#endif
}
/*
* look for key in the tree. path is filled in with nodes along the way
@ -963,7 +972,7 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
ins_len, int cow)
{
struct extent_buffer *b;
u64 blocknr;
u64 bytenr;
int slot;
int ret;
int level;
@ -1027,10 +1036,11 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
/* this is only true while dropping a snapshot */
if (level == lowest_level)
break;
blocknr = btrfs_node_blockptr(b, slot);
bytenr = btrfs_node_blockptr(b, slot);
if (should_reada)
reada_for_search(root, p, level, slot);
b = read_tree_block(root, btrfs_node_blockptr(b, slot));
b = read_tree_block(root, bytenr,
btrfs_level_size(root, level - 1));
} else {
p->slots[level] = slot;
if (ins_len > 0 && btrfs_leaf_free_space(root, b) <
@ -1193,14 +1203,14 @@ static int insert_new_root(struct btrfs_trans_handle *trans,
BUG_ON(path->nodes[level]);
BUG_ON(path->nodes[level-1] != root->node);
c = btrfs_alloc_free_block(trans, root,
extent_buffer_blocknr(root->node), 0);
c = btrfs_alloc_free_block(trans, root, root->nodesize,
root->node->start, 0);
if (IS_ERR(c))
return PTR_ERR(c);
memset_extent_buffer(c, 0, 0, root->nodesize);
btrfs_set_header_nritems(c, 1);
btrfs_set_header_level(c, level);
btrfs_set_header_blocknr(c, extent_buffer_blocknr(c));
btrfs_set_header_bytenr(c, c->start);
btrfs_set_header_generation(c, trans->transid);
btrfs_set_header_owner(c, root->root_key.objectid);
lower = path->nodes[level-1];
@ -1213,7 +1223,7 @@ static int insert_new_root(struct btrfs_trans_handle *trans,
else
btrfs_node_key(lower, &lower_key, 0);
btrfs_set_node_key(c, &lower_key, 0);
btrfs_set_node_blockptr(c, 0, extent_buffer_blocknr(lower));
btrfs_set_node_blockptr(c, 0, lower->start);
btrfs_mark_buffer_dirty(c);
@ -1237,7 +1247,7 @@ static int insert_new_root(struct btrfs_trans_handle *trans,
*/
static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, struct btrfs_disk_key
*key, u64 blocknr, int slot, int level)
*key, u64 bytenr, int slot, int level)
{
struct extent_buffer *lower;
int nritems;
@ -1256,10 +1266,9 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root
(nritems - slot) * sizeof(struct btrfs_key_ptr));
}
btrfs_set_node_key(lower, key, slot);
btrfs_set_node_blockptr(lower, slot, blocknr);
btrfs_set_node_blockptr(lower, slot, bytenr);
btrfs_set_header_nritems(lower, nritems + 1);
btrfs_mark_buffer_dirty(lower);
check_node(root, path, level);
return 0;
}
@ -1300,14 +1309,14 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
}
c_nritems = btrfs_header_nritems(c);
split = btrfs_alloc_free_block(trans, root,
extent_buffer_blocknr(c), 0);
split = btrfs_alloc_free_block(trans, root, root->nodesize,
c->start, 0);
if (IS_ERR(split))
return PTR_ERR(split);
btrfs_set_header_flags(split, btrfs_header_flags(c));
btrfs_set_header_level(split, btrfs_header_level(c));
btrfs_set_header_blocknr(split, extent_buffer_blocknr(split));
btrfs_set_header_bytenr(split, split->start);
btrfs_set_header_generation(split, trans->transid);
btrfs_set_header_owner(split, root->root_key.objectid);
write_extent_buffer(split, root->fs_info->fsid,
@ -1328,8 +1337,7 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_mark_buffer_dirty(split);
btrfs_node_key(split, &disk_key, 0);
wret = insert_ptr(trans, root, path, &disk_key,
extent_buffer_blocknr(split),
wret = insert_ptr(trans, root, path, &disk_key, split->start,
path->slots[level + 1] + 1,
level + 1);
if (wret)
@ -1407,6 +1415,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
u32 left_nritems;
u32 right_nritems;
u32 data_end;
u32 this_item_size;
int ret;
slot = path->slots[1];
@ -1417,7 +1426,8 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
if (slot >= btrfs_header_nritems(upper) - 1)
return 1;
right = read_tree_block(root, btrfs_node_blockptr(upper, slot + 1));
right = read_tree_block(root, btrfs_node_blockptr(upper, slot + 1),
root->leafsize);
free_space = btrfs_leaf_free_space(root, right);
if (free_space < data_size + sizeof(struct btrfs_item)) {
free_extent_buffer(right);
@ -1445,13 +1455,27 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
for (i = left_nritems - 1; i >= 1; i--) {
item = btrfs_item_nr(left, i);
if (path->slots[0] == i)
push_space += data_size + sizeof(*item);
if (btrfs_item_size(left, item) + sizeof(*item) + push_space >
free_space)
if (!left->map_token) {
map_extent_buffer(left, (unsigned long)item,
sizeof(struct btrfs_item),
&left->map_token, &left->kaddr,
&left->map_start, &left->map_len,
KM_USER1);
}
this_item_size = btrfs_item_size(left, item);
if (this_item_size + sizeof(*item) + push_space > free_space)
break;
push_items++;
push_space += btrfs_item_size(left, item) + sizeof(*item);
push_space += this_item_size + sizeof(*item);
}
if (left->map_token) {
unmap_extent_buffer(left, left->map_token, KM_USER1);
left->map_token = NULL;
}
if (push_items == 0) {
@ -1493,11 +1517,23 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
right_nritems += push_items;
btrfs_set_header_nritems(right, right_nritems);
push_space = BTRFS_LEAF_DATA_SIZE(root);
for (i = 0; i < right_nritems; i++) {
item = btrfs_item_nr(right, i);
btrfs_set_item_offset(right, item, push_space -
btrfs_item_size(right, item));
push_space = btrfs_item_offset(right, item);
if (!right->map_token) {
map_extent_buffer(right, (unsigned long)item,
sizeof(struct btrfs_item),
&right->map_token, &right->kaddr,
&right->map_start, &right->map_len,
KM_USER1);
}
push_space -= btrfs_item_size(right, item);
btrfs_set_item_offset(right, item, push_space);
}
if (right->map_token) {
unmap_extent_buffer(right, right->map_token, KM_USER1);
right->map_token = NULL;
}
left_nritems -= push_items;
btrfs_set_header_nritems(left, left_nritems);
@ -1518,8 +1554,6 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
} else {
free_extent_buffer(right);
}
if (path->nodes[1])
check_node(root, path, 1);
return 0;
}
/*
@ -1542,6 +1576,8 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
u32 right_nritems;
int ret = 0;
int wret;
u32 this_item_size;
u32 old_left_item_size;
slot = path->slots[1];
if (slot == 0)
@ -1550,7 +1586,7 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
return 1;
left = read_tree_block(root, btrfs_node_blockptr(path->nodes[1],
slot - 1));
slot - 1), root->leafsize);
free_space = btrfs_leaf_free_space(root, left);
if (free_space < data_size + sizeof(struct btrfs_item)) {
free_extent_buffer(left);
@ -1579,14 +1615,30 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
for (i = 0; i < right_nritems - 1; i++) {
item = btrfs_item_nr(right, i);
if (!right->map_token) {
map_extent_buffer(right, (unsigned long)item,
sizeof(struct btrfs_item),
&right->map_token, &right->kaddr,
&right->map_start, &right->map_len,
KM_USER1);
}
if (path->slots[0] == i)
push_space += data_size + sizeof(*item);
if (btrfs_item_size(right, item) + sizeof(*item) + push_space >
free_space)
this_item_size = btrfs_item_size(right, item);
if (this_item_size + sizeof(*item) + push_space > free_space)
break;
push_items++;
push_space += btrfs_item_size(right, item) + sizeof(*item);
push_space += this_item_size + sizeof(*item);
}
if (right->map_token) {
unmap_extent_buffer(right, right->map_token, KM_USER1);
right->map_token = NULL;
}
if (push_items == 0) {
free_extent_buffer(left);
return 1;
@ -1611,15 +1663,28 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
old_left_nritems = btrfs_header_nritems(left);
BUG_ON(old_left_nritems < 0);
old_left_item_size = btrfs_item_offset_nr(left, old_left_nritems - 1);
for (i = old_left_nritems; i < old_left_nritems + push_items; i++) {
u32 ioff;
item = btrfs_item_nr(left, i);
if (!left->map_token) {
map_extent_buffer(left, (unsigned long)item,
sizeof(struct btrfs_item),
&left->map_token, &left->kaddr,
&left->map_start, &left->map_len,
KM_USER1);
}
ioff = btrfs_item_offset(left, item);
btrfs_set_item_offset(left, item,
ioff - (BTRFS_LEAF_DATA_SIZE(root) -
btrfs_item_offset_nr(left, old_left_nritems - 1)));
ioff - (BTRFS_LEAF_DATA_SIZE(root) - old_left_item_size));
}
btrfs_set_header_nritems(left, old_left_nritems + push_items);
if (left->map_token) {
unmap_extent_buffer(left, left->map_token, KM_USER1);
left->map_token = NULL;
}
/* fixup right node */
push_space = btrfs_item_offset_nr(right, push_items - 1) -
@ -1640,9 +1705,21 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
for (i = 0; i < right_nritems; i++) {
item = btrfs_item_nr(right, i);
btrfs_set_item_offset(right, item, push_space -
btrfs_item_size(right, item));
push_space = btrfs_item_offset(right, item);
if (!right->map_token) {
map_extent_buffer(right, (unsigned long)item,
sizeof(struct btrfs_item),
&right->map_token, &right->kaddr,
&right->map_start, &right->map_len,
KM_USER1);
}
push_space = push_space - btrfs_item_size(right, item);
btrfs_set_item_offset(right, item, push_space);
}
if (right->map_token) {
unmap_extent_buffer(right, right->map_token, KM_USER1);
right->map_token = NULL;
}
btrfs_mark_buffer_dirty(left);
@ -1664,8 +1741,6 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
path->slots[0] -= push_items;
}
BUG_ON(path->slots[0] < 0);
if (path->nodes[1])
check_node(root, path, 1);
return ret;
}
@ -1718,13 +1793,13 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
nritems = btrfs_header_nritems(l);
mid = (nritems + 1)/ 2;
right = btrfs_alloc_free_block(trans, root,
extent_buffer_blocknr(l), 0);
right = btrfs_alloc_free_block(trans, root, root->leafsize,
l->start, 0);
if (IS_ERR(right))
return PTR_ERR(right);
memset_extent_buffer(right, 0, 0, sizeof(struct btrfs_header));
btrfs_set_header_blocknr(right, extent_buffer_blocknr(right));
btrfs_set_header_bytenr(right, right->start);
btrfs_set_header_generation(right, trans->transid);
btrfs_set_header_owner(right, root->root_key.objectid);
btrfs_set_header_level(right, 0);
@ -1740,8 +1815,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_cpu_key_to_disk(&disk_key, ins_key);
btrfs_set_header_nritems(right, 0);
wret = insert_ptr(trans, root, path,
&disk_key,
extent_buffer_blocknr(right),
&disk_key, right->start,
path->slots[1] + 1, 1);
if (wret)
ret = wret;
@ -1762,7 +1836,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_header_nritems(right, 0);
wret = insert_ptr(trans, root, path,
&disk_key,
extent_buffer_blocknr(right),
right->start,
path->slots[1], 1);
if (wret)
ret = wret;
@ -1799,15 +1873,30 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
for (i = 0; i < nritems; i++) {
struct btrfs_item *item = btrfs_item_nr(right, i);
u32 ioff = btrfs_item_offset(right, item);
u32 ioff;
if (!right->map_token) {
map_extent_buffer(right, (unsigned long)item,
sizeof(struct btrfs_item),
&right->map_token, &right->kaddr,
&right->map_start, &right->map_len,
KM_USER1);
}
ioff = btrfs_item_offset(right, item);
btrfs_set_item_offset(right, item, ioff + rt_data_off);
}
if (right->map_token) {
unmap_extent_buffer(right, right->map_token, KM_USER1);
right->map_token = NULL;
}
btrfs_set_header_nritems(l, mid);
ret = 0;
btrfs_item_key(right, &disk_key, 0);
wret = insert_ptr(trans, root, path, &disk_key,
extent_buffer_blocknr(right), path->slots[1] + 1, 1);
wret = insert_ptr(trans, root, path, &disk_key, right->start,
path->slots[1] + 1, 1);
if (wret)
ret = wret;
@ -1824,19 +1913,17 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
free_extent_buffer(right);
BUG_ON(path->slots[0] < 0);
check_node(root, path, 1);
check_leaf(root, path, 0);
if (!double_split)
return ret;
right = btrfs_alloc_free_block(trans, root,
extent_buffer_blocknr(l), 0);
right = btrfs_alloc_free_block(trans, root, root->leafsize,
l->start, 0);
if (IS_ERR(right))
return PTR_ERR(right);
memset_extent_buffer(right, 0, 0, sizeof(struct btrfs_header));
btrfs_set_header_blocknr(right, extent_buffer_blocknr(right));
btrfs_set_header_bytenr(right, right->start);
btrfs_set_header_generation(right, trans->transid);
btrfs_set_header_owner(right, root->root_key.objectid);
btrfs_set_header_level(right, 0);
@ -1847,8 +1934,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_cpu_key_to_disk(&disk_key, ins_key);
btrfs_set_header_nritems(right, 0);
wret = insert_ptr(trans, root, path,
&disk_key,
extent_buffer_blocknr(right),
&disk_key, right->start,
path->slots[1], 1);
if (wret)
ret = wret;
@ -1860,8 +1946,6 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
free_extent_buffer(path->nodes[0]);
path->nodes[0] = right;
path->slots[0] = 0;
check_node(root, path, 1);
check_leaf(root, path, 0);
return ret;
}
@ -1904,9 +1988,24 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans,
for (i = slot; i < nritems; i++) {
u32 ioff;
item = btrfs_item_nr(leaf, i);
if (!leaf->map_token) {
map_extent_buffer(leaf, (unsigned long)item,
sizeof(struct btrfs_item),
&leaf->map_token, &leaf->kaddr,
&leaf->map_start, &leaf->map_len,
KM_USER1);
}
ioff = btrfs_item_offset(leaf, item);
btrfs_set_item_offset(leaf, item, ioff + size_diff);
}
if (leaf->map_token) {
unmap_extent_buffer(leaf, leaf->map_token, KM_USER1);
leaf->map_token = NULL;
}
/* shift the data */
memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) +
data_end + size_diff, btrfs_leaf_data(leaf) +
@ -1921,7 +2020,6 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans,
btrfs_print_leaf(root, leaf);
BUG();
}
check_leaf(root, path, 0);
return ret;
}
@ -1963,10 +2061,23 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans,
for (i = slot; i < nritems; i++) {
u32 ioff;
item = btrfs_item_nr(leaf, i);
if (!leaf->map_token) {
map_extent_buffer(leaf, (unsigned long)item,
sizeof(struct btrfs_item),
&leaf->map_token, &leaf->kaddr,
&leaf->map_start, &leaf->map_len,
KM_USER1);
}
ioff = btrfs_item_offset(leaf, item);
btrfs_set_item_offset(leaf, item, ioff - data_size);
}
if (leaf->map_token) {
unmap_extent_buffer(leaf, leaf->map_token, KM_USER1);
leaf->map_token = NULL;
}
/* shift the data */
memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) +
data_end - data_size, btrfs_leaf_data(leaf) +
@ -1983,7 +2094,6 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans,
btrfs_print_leaf(root, leaf);
BUG();
}
check_leaf(root, path, 0);
return ret;
}
@ -2046,12 +2156,26 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
* item0..itemN ... dataN.offset..dataN.size .. data0.size
*/
/* first correct the data pointers */
WARN_ON(leaf->map_token);
for (i = slot; i < nritems; i++) {
u32 ioff;
item = btrfs_item_nr(leaf, i);
if (!leaf->map_token) {
map_extent_buffer(leaf, (unsigned long)item,
sizeof(struct btrfs_item),
&leaf->map_token, &leaf->kaddr,
&leaf->map_start, &leaf->map_len,
KM_USER1);
}
ioff = btrfs_item_offset(leaf, item);
btrfs_set_item_offset(leaf, item, ioff - data_size);
}
if (leaf->map_token) {
unmap_extent_buffer(leaf, leaf->map_token, KM_USER1);
leaf->map_token = NULL;
}
/* shift the items */
memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + 1),
@ -2081,7 +2205,6 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
btrfs_print_leaf(root, leaf);
BUG();
}
check_leaf(root, path, 0);
out:
return ret;
}
@ -2186,10 +2309,24 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
for (i = slot + 1; i < nritems; i++) {
u32 ioff;
item = btrfs_item_nr(leaf, i);
if (!leaf->map_token) {
map_extent_buffer(leaf, (unsigned long)item,
sizeof(struct btrfs_item),
&leaf->map_token, &leaf->kaddr,
&leaf->map_start, &leaf->map_len,
KM_USER1);
}
ioff = btrfs_item_offset(leaf, item);
btrfs_set_item_offset(leaf, item, ioff + dsize);
}
if (leaf->map_token) {
unmap_extent_buffer(leaf, leaf->map_token, KM_USER1);
leaf->map_token = NULL;
}
memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot),
btrfs_item_nr_offset(slot + 1),
sizeof(struct btrfs_item) *
@ -2209,8 +2346,7 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (wret)
ret = wret;
wret = btrfs_free_extent(trans, root,
extent_buffer_blocknr(leaf),
1, 1);
leaf->start, leaf->len, 1);
if (wret)
ret = wret;
}
@ -2247,7 +2383,8 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
}
if (btrfs_header_nritems(leaf) == 0) {
u64 blocknr = extent_buffer_blocknr(leaf);
u64 bytenr = leaf->start;
u32 blocksize = leaf->len;
clean_tree_block(trans, root, leaf);
wait_on_tree_block_writeback(root, leaf);
@ -2257,8 +2394,8 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
ret = wret;
free_extent_buffer(leaf);
wret = btrfs_free_extent(trans, root, blocknr,
1, 1);
wret = btrfs_free_extent(trans, root, bytenr,
blocksize, 1);
if (wret)
ret = wret;
} else {
@ -2281,7 +2418,7 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path)
{
int slot;
int level = 1;
u64 blocknr;
u64 bytenr;
struct extent_buffer *c;
struct extent_buffer *next = NULL;
@ -2296,14 +2433,15 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path)
continue;
}
blocknr = btrfs_node_blockptr(c, slot);
bytenr = btrfs_node_blockptr(c, slot);
if (next)
free_extent_buffer(next);
if (path->reada)
reada_for_search(root, path, level, slot);
next = read_tree_block(root, blocknr);
next = read_tree_block(root, bytenr,
btrfs_level_size(root, level -1));
break;
}
path->slots[level] = slot;
@ -2317,7 +2455,8 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path)
break;
if (path->reada)
reada_for_search(root, path, level, 0);
next = read_tree_block(root, btrfs_node_blockptr(next, 0));
next = read_tree_block(root, btrfs_node_blockptr(next, 0),
btrfs_level_size(root, level - 1));
}
return 0;
}

112
fs/btrfs/ctree.h
View File

@ -96,7 +96,7 @@ struct btrfs_key {
struct btrfs_header {
u8 csum[BTRFS_CSUM_SIZE];
u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
__le64 blocknr; /* which block this node is supposed to live in */
__le64 bytenr; /* which block this node is supposed to live in */
__le64 generation;
__le64 owner;
__le32 nritems;
@ -122,16 +122,17 @@ struct btrfs_super_block {
u8 csum[BTRFS_CSUM_SIZE];
/* the first 3 fields must match struct btrfs_header */
u8 fsid[16]; /* FS specific uuid */
__le64 blocknr; /* this block number */
__le64 bytenr; /* this block number */
__le64 magic;
__le64 generation;
__le64 root;
__le64 total_blocks;
__le64 blocks_used;
__le64 total_bytes;
__le64 bytes_used;
__le64 root_dir_objectid;
__le32 sectorsize;
__le32 nodesize;
__le32 leafsize;
u8 root_level;
} __attribute__ ((__packed__));
/*
@ -231,13 +232,14 @@ struct btrfs_dir_item {
struct btrfs_root_item {
struct btrfs_inode_item inode;
__le64 root_dirid;
__le64 blocknr;
__le64 block_limit;
__le64 blocks_used;
__le64 bytenr;
__le64 byte_limit;
__le64 bytes_used;
__le32 flags;
__le32 refs;
struct btrfs_disk_key drop_progress;
u8 drop_level;
u8 level;
} __attribute__ ((__packed__));
#define BTRFS_FILE_EXTENT_REG 0
@ -250,8 +252,8 @@ struct btrfs_file_extent_item {
* disk space consumed by the extent, checksum blocks are included
* in these numbers
*/
__le64 disk_blocknr;
__le64 disk_num_blocks;
__le64 disk_bytenr;
__le64 disk_num_bytes;
/*
* the logical offset in file blocks (no csums)
* this extent record is for. This allows a file extent to point
@ -263,7 +265,7 @@ struct btrfs_file_extent_item {
/*
* the logical number of file blocks (no csums included)
*/
__le64 num_blocks;
__le64 num_bytes;
} __attribute__ ((__packed__));
struct btrfs_csum_item {
@ -429,6 +431,7 @@ static inline u##bits btrfs_##name(struct extent_buffer *eb, \
int err; \
char *map_token; \
char *kaddr; \
int unmap_on_exit = (eb->map_token == NULL); \
unsigned long map_start; \
unsigned long map_len; \
unsigned long offset = (unsigned long)s + \
@ -436,12 +439,13 @@ static inline u##bits btrfs_##name(struct extent_buffer *eb, \
err = map_extent_buffer(eb, offset, \
sizeof(((type *)0)->member), \
&map_token, &kaddr, \
&map_start, &map_len, KM_USER0); \
&map_start, &map_len, KM_USER1); \
if (!err) { \
__le##bits *tmp = (__le##bits *)(kaddr + offset - \
map_start); \
u##bits res = le##bits##_to_cpu(*tmp); \
unmap_extent_buffer(eb, map_token, KM_USER0); \
if (unmap_on_exit) \
unmap_extent_buffer(eb, map_token, KM_USER1); \
return res; \
} else { \
__le##bits res; \
@ -457,17 +461,19 @@ static inline void btrfs_set_##name(struct extent_buffer *eb, \
char *kaddr; \
unsigned long map_start; \
unsigned long map_len; \
int unmap_on_exit = (eb->map_token == NULL); \
unsigned long offset = (unsigned long)s + \
offsetof(type, member); \
err = map_extent_buffer(eb, offset, \
sizeof(((type *)0)->member), \
&map_token, &kaddr, \
&map_start, &map_len, KM_USER0); \
&map_start, &map_len, KM_USER1); \
if (!err) { \
__le##bits *tmp = (__le##bits *)(kaddr + offset - \
map_start); \
*tmp = cpu_to_le##bits(val); \
unmap_extent_buffer(eb, map_token, KM_USER0); \
if (unmap_on_exit) \
unmap_extent_buffer(eb, map_token, KM_USER1); \
} else { \
val = cpu_to_le##bits(val); \
write_eb_member(eb, s, type, member, &val); \
@ -483,15 +489,17 @@ static inline u##bits btrfs_##name(struct extent_buffer *eb) \
unsigned long map_start; \
unsigned long map_len; \
unsigned long offset = offsetof(type, member); \
int unmap_on_exit = (eb->map_token == NULL); \
err = map_extent_buffer(eb, offset, \
sizeof(((type *)0)->member), \
&map_token, &kaddr, \
&map_start, &map_len, KM_USER0); \
&map_start, &map_len, KM_USER1); \
if (!err) { \
__le##bits *tmp = (__le##bits *)(kaddr + offset - \
map_start); \
u##bits res = le##bits##_to_cpu(*tmp); \
unmap_extent_buffer(eb, map_token, KM_USER0); \
if (unmap_on_exit) \
unmap_extent_buffer(eb, map_token, KM_USER1); \
return res; \
} else { \
__le##bits res; \
@ -508,15 +516,17 @@ static inline void btrfs_set_##name(struct extent_buffer *eb, \
unsigned long map_start; \
unsigned long map_len; \
unsigned long offset = offsetof(type, member); \
int unmap_on_exit = (eb->map_token == NULL); \
err = map_extent_buffer(eb, offset, \
sizeof(((type *)0)->member), \
&map_token, &kaddr, \
&map_start, &map_len, KM_USER0); \
&map_start, &map_len, KM_USER1); \
if (!err) { \
__le##bits *tmp = (__le##bits *)(kaddr + offset - \
map_start); \
*tmp = cpu_to_le##bits(val); \
unmap_extent_buffer(eb, map_token, KM_USER0); \
if (unmap_on_exit) \
unmap_extent_buffer(eb, map_token, KM_USER1); \
} else { \
val = cpu_to_le##bits(val); \
write_eb_member(eb, NULL, type, member, &val); \
@ -769,7 +779,7 @@ static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
}
/* struct btrfs_header */
BTRFS_SETGET_HEADER_FUNCS(header_blocknr, struct btrfs_header, blocknr, 64);
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
generation, 64);
BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
@ -817,24 +827,28 @@ static inline int btrfs_is_leaf(struct extent_buffer *eb)
/* struct btrfs_root_item */
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
BTRFS_SETGET_FUNCS(disk_root_blocknr, struct btrfs_root_item, blocknr, 64);
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
BTRFS_SETGET_STACK_FUNCS(root_blocknr, struct btrfs_root_item, blocknr, 64);
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, blocks_used, 64);
BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, block_limit, 64);
BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
/* struct btrfs_super_block */
BTRFS_SETGET_STACK_FUNCS(super_blocknr, struct btrfs_super_block, blocknr, 64);
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
BTRFS_SETGET_STACK_FUNCS(super_total_blocks, struct btrfs_super_block,
total_blocks, 64);
BTRFS_SETGET_STACK_FUNCS(super_blocks_used, struct btrfs_super_block,
blocks_used, 64);
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
total_bytes, 64);
BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
bytes_used, 64);
BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
sectorsize, 32);
BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
@ -856,33 +870,33 @@ static inline unsigned long btrfs_file_extent_inline_start(struct
btrfs_file_extent_item *e)
{
unsigned long offset = (unsigned long)e;
offset += offsetof(struct btrfs_file_extent_item, disk_blocknr);
offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
return offset;
}
static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
return offsetof(struct btrfs_file_extent_item, disk_blocknr) + datasize;
return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
}
static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
struct btrfs_item *e)
{
unsigned long offset;
offset = offsetof(struct btrfs_file_extent_item, disk_blocknr);
offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
return btrfs_item_size(eb, e) - offset;
}
BTRFS_SETGET_FUNCS(file_extent_disk_blocknr, struct btrfs_file_extent_item,
disk_blocknr, 64);
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
disk_bytenr, 64);
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
generation, 64);
BTRFS_SETGET_FUNCS(file_extent_disk_num_blocks, struct btrfs_file_extent_item,
disk_num_blocks, 64);
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
disk_num_bytes, 64);
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
offset, 64);
BTRFS_SETGET_FUNCS(file_extent_num_blocks, struct btrfs_file_extent_item,
num_blocks, 64);
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
num_bytes, 64);
static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
{
@ -906,6 +920,12 @@ static inline int btrfs_set_root_name(struct btrfs_root *root,
return 0;
}
static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
if (level == 0)
return root->leafsize;
return root->nodesize;
}
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
((type *)(btrfs_leaf_data(leaf) + \
@ -927,7 +947,7 @@ int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
int btrfs_copy_pinned(struct btrfs_root *root, struct extent_map_tree *copy);
struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
btrfs_fs_info *info,
u64 blocknr);
u64 bytenr);
struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
struct btrfs_block_group_cache
*hint, u64 search_start,
@ -935,22 +955,22 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 hint,
u64 empty_size);
struct btrfs_root *root, u32 size,
u64 hint, u64 empty_size);
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 owner,
u64 num_blocks, u64 empty_size, u64 search_start,
u64 num_bytes, u64 empty_size, u64 search_start,
u64 search_end, struct btrfs_key *ins, int data);
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct extent_buffer *buf);
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*root, u64 blocknr, u64 num_blocks, int pin);
*root, u64 bytenr, u64 num_bytes, int pin);
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_map_tree *unpin);
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 blocknr, u64 num_blocks);
u64 bytenr, u64 num_bytes);
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_free_block_groups(struct btrfs_fs_info *info);
@ -1040,12 +1060,12 @@ int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 objectid, u64 pos, u64 offset,
u64 disk_num_blocks,
u64 num_blocks);
u64 disk_num_bytes,
u64 num_bytes);
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, u64 objectid,
u64 blocknr, int mod);
u64 bytenr, int mod);
int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 objectid, u64 offset,

92
fs/btrfs/disk-io.c
View File

@ -28,6 +28,7 @@
#include "disk-io.h"
#include "transaction.h"
#include "btrfs_inode.h"
#include "print-tree.h"
#if 0
static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf)
@ -43,26 +44,25 @@ static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf)
#endif
struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
u64 blocknr)
u64 bytenr, u32 blocksize)
{
struct inode *btree_inode = root->fs_info->btree_inode;
struct extent_buffer *eb;
eb = find_extent_buffer(&BTRFS_I(btree_inode)->extent_tree,
blocknr * root->sectorsize,
root->sectorsize, GFP_NOFS);
bytenr, blocksize, GFP_NOFS);
if (eb)
eb->alloc_addr = (unsigned long)__builtin_return_address(0);
return eb;
}
struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
u64 blocknr)
u64 bytenr, u32 blocksize)
{
struct inode *btree_inode = root->fs_info->btree_inode;
struct extent_buffer *eb;
eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->extent_tree,
blocknr * root->sectorsize,
root->sectorsize, GFP_NOFS);
bytenr, blocksize, GFP_NOFS);
eb->alloc_addr = (unsigned long)__builtin_return_address(0);
return eb;
}
@ -208,13 +208,13 @@ static struct address_space_operations btree_aops = {
.sync_page = block_sync_page,
};
int readahead_tree_block(struct btrfs_root *root, u64 blocknr)
int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize)
{
struct extent_buffer *buf = NULL;
struct inode *btree_inode = root->fs_info->btree_inode;
int ret = 0;
buf = btrfs_find_create_tree_block(root, blocknr);
buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
if (!buf)
return 0;
read_extent_buffer_pages(&BTRFS_I(btree_inode)->extent_tree,
@ -223,12 +223,13 @@ int readahead_tree_block(struct btrfs_root *root, u64 blocknr)
return ret;
}
struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr)
struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
u32 blocksize)
{
struct extent_buffer *buf = NULL;
struct inode *btree_inode = root->fs_info->btree_inode;
buf = btrfs_find_create_tree_block(root, blocknr);
buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
if (!buf)
return NULL;
read_extent_buffer_pages(&BTRFS_I(btree_inode)->extent_tree,
@ -261,7 +262,7 @@ int set_tree_block_dirty(struct btrfs_root *root, struct extent_buffer *buf)
return 0;
}
static int __setup_root(int blocksize,
static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
struct btrfs_root *root,
struct btrfs_fs_info *fs_info,
u64 objectid)
@ -269,9 +270,9 @@ static int __setup_root(int blocksize,
root->node = NULL;
root->inode = NULL;
root->commit_root = NULL;
root->sectorsize = blocksize;
root->nodesize = blocksize;
root->leafsize = blocksize;
root->sectorsize = sectorsize;
root->nodesize = nodesize;
root->leafsize = leafsize;
root->ref_cows = 0;
root->fs_info = fs_info;
root->objectid = objectid;
@ -291,21 +292,23 @@ static int __setup_root(int blocksize,
return 0;
}
static int find_and_setup_root(int blocksize,
struct btrfs_root *tree_root,
static int find_and_setup_root(struct btrfs_root *tree_root,
struct btrfs_fs_info *fs_info,
u64 objectid,
struct btrfs_root *root)
{
int ret;
u32 blocksize;
__setup_root(blocksize, root, fs_info, objectid);
__setup_root(tree_root->nodesize, tree_root->leafsize,
tree_root->sectorsize, root, fs_info, objectid);
ret = btrfs_find_last_root(tree_root, objectid,
&root->root_item, &root->root_key);
BUG_ON(ret);
root->node = read_tree_block(root,
btrfs_root_blocknr(&root->root_item));
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
blocksize);
BUG_ON(!root->node);
return 0;
}
@ -318,14 +321,14 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info,
struct btrfs_path *path;
struct extent_buffer *l;
u64 highest_inode;
u32 blocksize;
int ret = 0;
root = kzalloc(sizeof(*root), GFP_NOFS);
if (!root)
return ERR_PTR(-ENOMEM);
if (location->offset == (u64)-1) {
ret = find_and_setup_root(fs_info->sb->s_blocksize,
fs_info->tree_root, fs_info,
ret = find_and_setup_root(tree_root, fs_info,
location->objectid, root);
if (ret) {
kfree(root);
@ -334,7 +337,8 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info,
goto insert;
}
__setup_root(fs_info->sb->s_blocksize, root, fs_info,
__setup_root(tree_root->nodesize, tree_root->leafsize,
tree_root->sectorsize, root, fs_info,
location->objectid);
path = btrfs_alloc_path();
@ -357,8 +361,9 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info,
kfree(root);
return ERR_PTR(ret);
}
root->node = read_tree_block(root,
btrfs_root_blocknr(&root->root_item));
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
blocksize);
BUG_ON(!root->node);
insert:
root->ref_cows = 1;
@ -418,6 +423,10 @@ struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_root *open_ctree(struct super_block *sb)
{
u32 sectorsize;
u32 nodesize;
u32 leafsize;
u32 blocksize;
struct btrfs_root *extent_root = kmalloc(sizeof(struct btrfs_root),
GFP_NOFS);
struct btrfs_root *tree_root = kmalloc(sizeof(struct btrfs_root),
@ -474,12 +483,12 @@ struct btrfs_root *open_ctree(struct super_block *sb)
mutex_init(&fs_info->trans_mutex);
mutex_init(&fs_info->fs_mutex);
__setup_root(sb->s_blocksize, tree_root,
__setup_root(512, 512, 512, tree_root,
fs_info, BTRFS_ROOT_TREE_OBJECTID);
fs_info->sb_buffer = read_tree_block(tree_root,
BTRFS_SUPER_INFO_OFFSET /
sb->s_blocksize);
BTRFS_SUPER_INFO_OFFSET,
512);
if (!fs_info->sb_buffer)
goto fail_iput;
@ -494,9 +503,15 @@ struct btrfs_root *open_ctree(struct super_block *sb)
if (!btrfs_super_root(disk_super))
goto fail_sb_buffer;
nodesize = btrfs_super_nodesize(disk_super);
leafsize = btrfs_super_leafsize(disk_super);
sectorsize = btrfs_super_sectorsize(disk_super);
tree_root->nodesize = nodesize;
tree_root->leafsize = leafsize;
tree_root->sectorsize = sectorsize;
i_size_write(fs_info->btree_inode,
btrfs_super_total_blocks(disk_super) <<
fs_info->btree_inode->i_blkbits);
btrfs_super_total_bytes(disk_super));
if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC,
@ -504,13 +519,22 @@ struct btrfs_root *open_ctree(struct super_block *sb)
printk("btrfs: valid FS not found on %s\n", sb->s_id);
goto fail_sb_buffer;
}
blocksize = btrfs_level_size(tree_root,
btrfs_super_root_level(disk_super));
tree_root->node = read_tree_block(tree_root,
btrfs_super_root(disk_super));
btrfs_super_root(disk_super),
blocksize);
if (!tree_root->node)
goto fail_sb_buffer;
#if 0
btrfs_print_leaf(tree_root, tree_root->node);
err = -EIO;
goto fail_tree_root;
#endif
mutex_lock(&fs_info->fs_mutex);
ret = find_and_setup_root(sb->s_blocksize, tree_root, fs_info,
ret = find_and_setup_root(tree_root, fs_info,
BTRFS_EXTENT_TREE_OBJECTID, extent_root);
if (ret) {
mutex_unlock(&fs_info->fs_mutex);
@ -611,11 +635,11 @@ int close_ctree(struct btrfs_root *root)
free_extent_buffer(fs_info->tree_root->node);
free_extent_buffer(fs_info->sb_buffer);
truncate_inode_pages(fs_info->btree_inode->i_mapping, 0);
iput(fs_info->btree_inode);
btrfs_free_block_groups(root->fs_info);
del_fs_roots(fs_info);
truncate_inode_pages(fs_info->btree_inode->i_mapping, 0);
iput(fs_info->btree_inode);
kfree(fs_info->extent_root);
kfree(fs_info->tree_root);
return 0;
@ -642,7 +666,7 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
if (transid != root->fs_info->generation) {
printk(KERN_CRIT "transid mismatch buffer %llu, found %Lu running %Lu\n",
(unsigned long long)extent_buffer_blocknr(buf),
(unsigned long long)buf->start,
transid, root->fs_info->generation);
WARN_ON(1);
}

9
fs/btrfs/disk-io.h
View File

@ -21,10 +21,11 @@
#define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr);
int readahead_tree_block(struct btrfs_root *root, u64 blocknr);
struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
u32 blocksize);
int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize);
struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
u64 blocknr);
u64 bytenr, u32 blocksize);
int clean_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *buf);
struct btrfs_root *open_ctree(struct super_block *sb);
@ -32,7 +33,7 @@ int close_ctree(struct btrfs_root *root);
int write_ctree_super(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
u64 blocknr);
u64 bytenr, u32 blocksize);
struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_key *location,
const char *name, int namelen);

285
fs/btrfs/extent-tree.c
View File

@ -129,7 +129,7 @@ static int cache_block_group(struct btrfs_root *root,
struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
btrfs_fs_info *info,
u64 blocknr)
u64 bytenr)
{
struct extent_map_tree *block_group_cache;
struct btrfs_block_group_cache *block_group = NULL;
@ -140,7 +140,7 @@ struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
block_group_cache = &info->block_group_cache;
ret = find_first_extent_bit(block_group_cache,
blocknr, &start, &end,
bytenr, &start, &end,
BLOCK_GROUP_DATA | BLOCK_GROUP_METADATA);
if (ret) {
return NULL;
@ -152,7 +152,7 @@ struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
block_group = (struct btrfs_block_group_cache *)ptr;
if (block_group->key.objectid <= blocknr && blocknr <=
if (block_group->key.objectid <= bytenr && bytenr <=
block_group->key.objectid + block_group->key.offset)
return block_group;
@ -315,7 +315,7 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 blocknr, u64 num_blocks)
u64 bytenr, u64 num_bytes)
{
struct btrfs_path *path;
int ret;
@ -324,13 +324,14 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_extent_item *item;
u32 refs;
WARN_ON(num_bytes < root->sectorsize);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
key.objectid = blocknr;
key.objectid = bytenr;
btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
key.offset = num_blocks;
key.offset = num_bytes;
ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path,
0, 1);
if (ret < 0)
@ -361,8 +362,8 @@ int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
}
static int lookup_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 blocknr,
u64 num_blocks, u32 *refs)
struct btrfs_root *root, u64 bytenr,
u64 num_bytes, u32 *refs)
{
struct btrfs_path *path;
int ret;
@ -370,9 +371,10 @@ static int lookup_extent_ref(struct btrfs_trans_handle *trans,
struct extent_buffer *l;
struct btrfs_extent_item *item;
WARN_ON(num_bytes < root->sectorsize);
path = btrfs_alloc_path();
key.objectid = blocknr;
key.offset = num_blocks;
key.objectid = bytenr;
key.offset = num_bytes;
btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path,
0, 0);
@ -380,7 +382,7 @@ static int lookup_extent_ref(struct btrfs_trans_handle *trans,
goto out;
if (ret != 0) {
btrfs_print_leaf(root, path->nodes[0]);
printk("failed to find block number %Lu\n", blocknr);
printk("failed to find block number %Lu\n", bytenr);
BUG();
}
l = path->nodes[0];
@ -394,19 +396,19 @@ static int lookup_extent_ref(struct btrfs_trans_handle *trans,
int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
return btrfs_inc_extent_ref(trans, root,
extent_buffer_blocknr(root->node), 1);
return btrfs_inc_extent_ref(trans, root, root->node->start,
root->node->len);
}
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct extent_buffer *buf)
{
u64 blocknr;
u64 bytenr;
u32 nritems;
struct btrfs_key key;
struct btrfs_file_extent_item *fi;
int i;
int leaf;
int level;
int ret;
int faili;
int err;
@ -414,11 +416,11 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (!root->ref_cows)
return 0;
leaf = btrfs_is_leaf(buf);
level = btrfs_header_level(buf);
nritems = btrfs_header_nritems(buf);
for (i = 0; i < nritems; i++) {
if (leaf) {
u64 disk_blocknr;
if (level == 0) {
u64 disk_bytenr;
btrfs_item_key_to_cpu(buf, &key, i);
if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY)
continue;
@ -427,18 +429,19 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (btrfs_file_extent_type(buf, fi) ==
BTRFS_FILE_EXTENT_INLINE)
continue;
disk_blocknr = btrfs_file_extent_disk_blocknr(buf, fi);
if (disk_blocknr == 0)
disk_bytenr = btrfs_file_extent_disk_bytenr(buf, fi);
if (disk_bytenr == 0)
continue;
ret = btrfs_inc_extent_ref(trans, root, disk_blocknr,
btrfs_file_extent_disk_num_blocks(buf, fi));
ret = btrfs_inc_extent_ref(trans, root, disk_bytenr,
btrfs_file_extent_disk_num_bytes(buf, fi));
if (ret) {
faili = i;
goto fail;
}
} else {
blocknr = btrfs_node_blockptr(buf, i);
ret = btrfs_inc_extent_ref(trans, root, blocknr, 1);
bytenr = btrfs_node_blockptr(buf, i);
ret = btrfs_inc_extent_ref(trans, root, bytenr,
btrfs_level_size(root, level - 1));
if (ret) {
faili = i;
goto fail;
@ -449,8 +452,8 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
fail:
WARN_ON(1);
for (i =0; i < faili; i++) {
if (leaf) {
u64 disk_blocknr;
if (level == 0) {
u64 disk_bytenr;
btrfs_item_key_to_cpu(buf, &key, i);
if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY)
continue;
@ -459,16 +462,17 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (btrfs_file_extent_type(buf, fi) ==
BTRFS_FILE_EXTENT_INLINE)
continue;
disk_blocknr = btrfs_file_extent_disk_blocknr(buf, fi);
if (disk_blocknr == 0)
disk_bytenr = btrfs_file_extent_disk_bytenr(buf, fi);
if (disk_bytenr == 0)
continue;
err = btrfs_free_extent(trans, root, disk_blocknr,
btrfs_file_extent_disk_num_blocks(buf,
err = btrfs_free_extent(trans, root, disk_bytenr,
btrfs_file_extent_disk_num_bytes(buf,
fi), 0);
BUG_ON(err);
} else {
blocknr = btrfs_node_blockptr(buf, i);
err = btrfs_free_extent(trans, root, blocknr, 1, 0);
bytenr = btrfs_node_blockptr(buf, i);
err = btrfs_free_extent(trans, root, bytenr,
btrfs_level_size(root, level - 1), 0);
BUG_ON(err);
}
}
@ -558,31 +562,31 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
static int update_block_group(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 blocknr, u64 num, int alloc, int mark_free,
int data)
u64 bytenr, u64 num_bytes, int alloc,
int mark_free, int data)
{
struct btrfs_block_group_cache *cache;
struct btrfs_fs_info *info = root->fs_info;
u64 total = num;
u64 total = num_bytes;
u64 old_val;
u64 block_in_group;
u64 byte_in_group;
u64 start;
u64 end;
while(total) {
cache = btrfs_lookup_block_group(info, blocknr);
cache = btrfs_lookup_block_group(info, bytenr);
if (!cache) {
return -1;
}
block_in_group = blocknr - cache->key.objectid;
WARN_ON(block_in_group > cache->key.offset);
byte_in_group = bytenr - cache->key.objectid;
WARN_ON(byte_in_group > cache->key.offset);
start = cache->key.objectid;
end = start + cache->key.offset - 1;
set_extent_bits(&info->block_group_cache, start, end,
BLOCK_GROUP_DIRTY, GFP_NOFS);
old_val = btrfs_block_group_used(&cache->item);
num = min(total, cache->key.offset - block_in_group);
num_bytes = min(total, cache->key.offset - byte_in_group);
if (alloc) {
if (cache->data != data &&
old_val < (cache->key.offset >> 1)) {
@ -608,18 +612,18 @@ static int update_block_group(struct btrfs_trans_handle *trans,
start, end, bit_to_set,
GFP_NOFS);
}
old_val += num;
old_val += num_bytes;
} else {
old_val -= num;
old_val -= num_bytes;
if (mark_free) {
set_extent_dirty(&info->free_space_cache,
blocknr, blocknr + num - 1,
bytenr, bytenr + num_bytes - 1,
GFP_NOFS);
}
}
btrfs_set_block_group_used(&cache->item, old_val);
total -= num;
blocknr += num;
total -= num_bytes;
bytenr += num_bytes;
}
return 0;
}
@ -701,13 +705,14 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, struct
return 0;
}
static int pin_down_block(struct btrfs_root *root, u64 blocknr, int pending)
static int pin_down_bytes(struct btrfs_root *root, u64 bytenr, u32 num_bytes,
int pending)
{
int err = 0;
struct extent_buffer *buf;
if (!pending) {
buf = btrfs_find_tree_block(root, blocknr);
buf = btrfs_find_tree_block(root, bytenr, num_bytes);
if (buf) {
if (btrfs_buffer_uptodate(buf)) {
u64 transid =
@ -720,10 +725,11 @@ static int pin_down_block(struct btrfs_root *root, u64 blocknr, int pending)
free_extent_buffer(buf);
}
set_extent_dirty(&root->fs_info->pinned_extents,
blocknr, blocknr, GFP_NOFS);
bytenr, bytenr + num_bytes - 1, GFP_NOFS);
} else {
set_extent_bits(&root->fs_info->pending_del,
blocknr, blocknr, EXTENT_LOCKED, GFP_NOFS);
bytenr, bytenr + num_bytes - 1,
EXTENT_LOCKED, GFP_NOFS);
}
BUG_ON(err < 0);
return 0;
@ -733,7 +739,7 @@ static int pin_down_block(struct btrfs_root *root, u64 blocknr, int pending)
* remove an extent from the root, returns 0 on success
*/
static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*root, u64 blocknr, u64 num_blocks, int pin,
*root, u64 bytenr, u64 num_bytes, int pin,
int mark_free)
{
struct btrfs_path *path;
@ -745,9 +751,9 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
struct btrfs_extent_item *ei;
u32 refs;
key.objectid = blocknr;
key.objectid = bytenr;
btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
key.offset = num_blocks;
key.offset = num_bytes;
path = btrfs_alloc_path();
if (!path)
@ -768,28 +774,29 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_mark_buffer_dirty(leaf);
if (refs == 0) {
u64 super_blocks_used, root_blocks_used;
u64 super_used;
u64 root_used;
if (pin) {
ret = pin_down_block(root, blocknr, 0);
ret = pin_down_bytes(root, bytenr, num_bytes, 0);
BUG_ON(ret);
}
/* block accounting for super block */
super_blocks_used = btrfs_super_blocks_used(&info->super_copy);
btrfs_set_super_blocks_used(&info->super_copy,
super_blocks_used - num_blocks);
super_used = btrfs_super_bytes_used(&info->super_copy);
btrfs_set_super_bytes_used(&info->super_copy,
super_used - num_bytes);
/* block accounting for root item */
root_blocks_used = btrfs_root_used(&root->root_item);
root_used = btrfs_root_used(&root->root_item);
btrfs_set_root_used(&root->root_item,
root_blocks_used - num_blocks);
root_used - num_bytes);
ret = btrfs_del_item(trans, extent_root, path);
if (ret) {
return ret;
}
ret = update_block_group(trans, root, blocknr, num_blocks, 0,
ret = update_block_group(trans, root, bytenr, num_bytes, 0,
mark_free, 0);
BUG_ON(ret);
}
@ -836,17 +843,18 @@ static int del_pending_extents(struct btrfs_trans_handle *trans, struct
* remove an extent from the root, returns 0 on success
*/
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*root, u64 blocknr, u64 num_blocks, int pin)
*root, u64 bytenr, u64 num_bytes, int pin)
{
struct btrfs_root *extent_root = root->fs_info->extent_root;
int pending_ret;
int ret;
WARN_ON(num_bytes < root->sectorsize);
if (root == extent_root) {
pin_down_block(root, blocknr, 1);
pin_down_bytes(root, bytenr, num_bytes, 1);
return 0;
}
ret = __free_extent(trans, root, blocknr, num_blocks, pin, pin == 0);
ret = __free_extent(trans, root, bytenr, num_bytes, pin, pin == 0);
pending_ret = del_pending_extents(trans, root->fs_info->extent_root);
return ret ? ret : pending_ret;
}
@ -860,8 +868,8 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
* Any available blocks before search_start are skipped.
*/
static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*orig_root, u64 num_blocks, u64 empty_size,
u64 search_start, u64 search_end, u64 hint_block,
*orig_root, u64 num_bytes, u64 empty_size,
u64 search_start, u64 search_end, u64 hint_byte,
struct btrfs_key *ins, u64 exclude_start,
u64 exclude_nr, int data)
{
@ -870,30 +878,29 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
int ret;
u64 hole_size = 0;
int slot = 0;
u64 last_block = 0;
u64 last_byte = 0;
u64 orig_search_start = search_start;
int start_found;
struct extent_buffer *l;
struct btrfs_root * root = orig_root->fs_info->extent_root;
struct btrfs_fs_info *info = root->fs_info;
int total_needed = num_blocks;
u64 total_needed = num_bytes;
int level;
struct btrfs_block_group_cache *block_group;
int full_scan = 0;
int wrapped = 0;
u64 cached_search_start = 0;
WARN_ON(num_blocks < 1);
WARN_ON(num_bytes < root->sectorsize);
btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY);
level = btrfs_header_level(root->node);
if (search_end == (u64)-1)
search_end = btrfs_super_total_blocks(&info->super_copy);
if (hint_block) {
block_group = btrfs_lookup_block_group(info, hint_block);
search_end = btrfs_super_total_bytes(&info->super_copy);
if (hint_byte) {
block_group = btrfs_lookup_block_group(info, hint_byte);
block_group = btrfs_find_block_group(root, block_group,
hint_block, data, 1);
hint_byte, data, 1);
} else {
block_group = btrfs_find_block_group(root,
trans->block_group, 0,
@ -906,7 +913,6 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
check_failed:
search_start = find_search_start(root, &block_group,
search_start, total_needed, data);
cached_search_start = search_start;
btrfs_init_path(path);
ins->objectid = search_start;
@ -958,27 +964,27 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
start_found = 1;
goto check_pending;
}
ins->objectid = last_block > search_start ?
last_block : search_start;
ins->objectid = last_byte > search_start ?
last_byte : search_start;
ins->offset = search_end - ins->objectid;
goto check_pending;
}
btrfs_item_key_to_cpu(l, &key, slot);
if (key.objectid >= search_start && key.objectid > last_block &&
if (key.objectid >= search_start && key.objectid > last_byte &&
start_found) {
if (last_block < search_start)
last_block = search_start;
hole_size = key.objectid - last_block;
if (hole_size >= num_blocks) {
ins->objectid = last_block;
if (last_byte < search_start)
last_byte = search_start;
hole_size = key.objectid - last_byte;
if (hole_size >= num_bytes) {
ins->objectid = last_byte;
ins->offset = hole_size;
goto check_pending;
}
}
if (btrfs_key_type(&key) != BTRFS_EXTENT_ITEM_KEY) {
if (!start_found) {
last_block = key.objectid;
last_byte = key.objectid;
start_found = 1;
}
goto next;
@ -986,9 +992,9 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
start_found = 1;
last_block = key.objectid + key.offset;
last_byte = key.objectid + key.offset;
if (!full_scan && last_block >= block_group->key.objectid +
if (!full_scan && last_byte >= block_group->key.objectid +
block_group->key.offset) {
btrfs_release_path(root, path);
search_start = block_group->key.objectid +
@ -1006,20 +1012,20 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_release_path(root, path);
BUG_ON(ins->objectid < search_start);
if (ins->objectid + num_blocks >= search_end)
if (ins->objectid + num_bytes >= search_end)
goto enospc;
if (test_range_bit(&info->extent_ins, ins->objectid,
ins->objectid + num_blocks -1, EXTENT_LOCKED, 0)) {
search_start = ins->objectid + num_blocks;
ins->objectid + num_bytes -1, EXTENT_LOCKED, 0)) {
search_start = ins->objectid + num_bytes;
goto new_group;
}
if (test_range_bit(&info->pinned_extents, ins->objectid,
ins->objectid + num_blocks -1, EXTENT_DIRTY, 0)) {
search_start = ins->objectid + num_blocks;
ins->objectid + num_bytes -1, EXTENT_DIRTY, 0)) {
search_start = ins->objectid + num_bytes;
goto new_group;
}
if (exclude_nr > 0 && (ins->objectid + num_blocks > exclude_start &&
if (exclude_nr > 0 && (ins->objectid + num_bytes > exclude_start &&
ins->objectid < exclude_start + exclude_nr)) {
search_start = exclude_start + exclude_nr;
goto new_group;
@ -1029,12 +1035,12 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
if (block_group)
trans->block_group = block_group;
}
ins->offset = num_blocks;
ins->offset = num_bytes;
btrfs_free_path(path);
return 0;
new_group:
if (search_start + num_blocks >= search_end) {
if (search_start + num_bytes >= search_end) {
enospc:
search_start = orig_search_start;
if (full_scan) {
@ -1069,12 +1075,12 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*/
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 owner,
u64 num_blocks, u64 empty_size, u64 hint_block,
u64 num_bytes, u64 empty_size, u64 hint_byte,
u64 search_end, struct btrfs_key *ins, int data)
{
int ret;
int pending_ret;
u64 super_blocks_used, root_blocks_used;
u64 super_used, root_used;
u64 search_start = 0;
struct btrfs_fs_info *info = root->fs_info;
struct btrfs_root *extent_root = info->extent_root;
@ -1083,9 +1089,9 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
btrfs_set_stack_extent_refs(&extent_item, 1);
btrfs_set_stack_extent_owner(&extent_item, owner);
WARN_ON(num_blocks < 1);
ret = find_free_extent(trans, root, num_blocks, empty_size,
search_start, search_end, hint_block, ins,
WARN_ON(num_bytes < root->sectorsize);
ret = find_free_extent(trans, root, num_bytes, empty_size,
search_start, search_end, hint_byte, ins,
trans->alloc_exclude_start,
trans->alloc_exclude_nr, data);
BUG_ON(ret);
@ -1093,21 +1099,18 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
return ret;
/* block accounting for super block */
super_blocks_used = btrfs_super_blocks_used(&info->super_copy);
btrfs_set_super_blocks_used(&info->super_copy, super_blocks_used +
num_blocks);
super_used = btrfs_super_bytes_used(&info->super_copy);
btrfs_set_super_bytes_used(&info->super_copy, super_used + num_bytes);
/* block accounting for root item */
root_blocks_used = btrfs_root_used(&root->root_item);
btrfs_set_root_used(&root->root_item, root_blocks_used +
num_blocks);
root_used = btrfs_root_used(&root->root_item);
btrfs_set_root_used(&root->root_item, root_used + num_bytes);
clear_extent_dirty(&root->fs_info->free_space_cache,
ins->objectid, ins->objectid + ins->offset - 1,
GFP_NOFS);
if (root == extent_root) {
BUG_ON(num_blocks != 1);
set_extent_bits(&root->fs_info->extent_ins, ins->objectid,
ins->objectid + ins->offset - 1,
EXTENT_LOCKED, GFP_NOFS);
@ -1146,7 +1149,8 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
* returns the tree buffer or NULL.
*/
struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 hint,
struct btrfs_root *root,
u32 blocksize, u64 hint,
u64 empty_size)
{
struct btrfs_key ins;
@ -1154,14 +1158,15 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
struct extent_buffer *buf;
ret = btrfs_alloc_extent(trans, root, root->root_key.objectid,
1, empty_size, hint, (u64)-1, &ins, 0);
blocksize, empty_size, hint,
(u64)-1, &ins, 0);
if (ret) {
BUG_ON(ret > 0);
return ERR_PTR(ret);
}
buf = btrfs_find_create_tree_block(root, ins.objectid);
buf = btrfs_find_create_tree_block(root, ins.objectid, blocksize);
if (!buf) {
btrfs_free_extent(trans, root, ins.objectid, 1, 0);
btrfs_free_extent(trans, root, ins.objectid, blocksize, 0);
return ERR_PTR(-ENOMEM);
}
btrfs_set_buffer_uptodate(buf);
@ -1191,7 +1196,7 @@ static int drop_leaf_ref(struct btrfs_trans_handle *trans,
BUG_ON(!btrfs_is_leaf(leaf));
nritems = btrfs_header_nritems(leaf);
for (i = 0; i < nritems; i++) {
u64 disk_blocknr;
u64 disk_bytenr;
btrfs_item_key_to_cpu(leaf, &key, i);
if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY)
@ -1204,11 +1209,11 @@ static int drop_leaf_ref(struct btrfs_trans_handle *trans,
* FIXME make sure to insert a trans record that
* repeats the snapshot del on crash
*/
disk_blocknr = btrfs_file_extent_disk_blocknr(leaf, fi);
if (disk_blocknr == 0)
disk_bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);
if (disk_bytenr == 0)
continue;
ret = btrfs_free_extent(trans, root, disk_blocknr,
btrfs_file_extent_disk_num_blocks(leaf, fi), 0);
ret = btrfs_free_extent(trans, root, disk_bytenr,
btrfs_file_extent_disk_num_bytes(leaf, fi), 0);
BUG_ON(ret);
}
return 0;
@ -1219,19 +1224,23 @@ static void reada_walk_down(struct btrfs_root *root,
{
int i;
u32 nritems;
u64 blocknr;
u64 bytenr;
int ret;
u32 refs;
int level;
u32 blocksize;
nritems = btrfs_header_nritems(node);
level = btrfs_header_level(node);
for (i = 0; i < nritems; i++) {
blocknr = btrfs_node_blockptr(node, i);
ret = lookup_extent_ref(NULL, root, blocknr, 1, &refs);
bytenr = btrfs_node_blockptr(node, i);
blocksize = btrfs_level_size(root, level - 1);
ret = lookup_extent_ref(NULL, root, bytenr, blocksize, &refs);
BUG_ON(ret);
if (refs != 1)
continue;
mutex_unlock(&root->fs_info->fs_mutex);
ret = readahead_tree_block(root, blocknr);
ret = readahead_tree_block(root, bytenr, blocksize);
cond_resched();
mutex_lock(&root->fs_info->fs_mutex);
if (ret)
@ -1248,15 +1257,16 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root
{
struct extent_buffer *next;
struct extent_buffer *cur;
u64 blocknr;
u64 bytenr;
u32 blocksize;
int ret;
u32 refs;
WARN_ON(*level < 0);
WARN_ON(*level >= BTRFS_MAX_LEVEL);
ret = lookup_extent_ref(trans, root,
extent_buffer_blocknr(path->nodes[*level]),
1, &refs);
path->nodes[*level]->start,
path->nodes[*level]->len, &refs);
BUG_ON(ret);
if (refs > 1)
goto out;
@ -1283,30 +1293,33 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root
BUG_ON(ret);
break;
}
blocknr = btrfs_node_blockptr(cur, path->slots[*level]);
ret = lookup_extent_ref(trans, root, blocknr, 1, &refs);
bytenr = btrfs_node_blockptr(cur, path->slots[*level]);
blocksize = btrfs_level_size(root, *level - 1);
ret = lookup_extent_ref(trans, root, bytenr, blocksize, &refs);
BUG_ON(ret);
if (refs != 1) {
path->slots[*level]++;
ret = btrfs_free_extent(trans, root, blocknr, 1, 1);
ret = btrfs_free_extent(trans, root, bytenr,
blocksize, 1);
BUG_ON(ret);
continue;
}
next = btrfs_find_tree_block(root, blocknr);
next = btrfs_find_tree_block(root, bytenr, blocksize);
if (!next || !btrfs_buffer_uptodate(next)) {
free_extent_buffer(next);
mutex_unlock(&root->fs_info->fs_mutex);
next = read_tree_block(root, blocknr);
next = read_tree_block(root, bytenr, blocksize);
mutex_lock(&root->fs_info->fs_mutex);
/* we dropped the lock, check one more time */
ret = lookup_extent_ref(trans, root, blocknr, 1, &refs);
ret = lookup_extent_ref(trans, root, bytenr,
blocksize, &refs);
BUG_ON(ret);
if (refs != 1) {
path->slots[*level]++;
free_extent_buffer(next);
ret = btrfs_free_extent(trans, root,
blocknr, 1, 1);
bytenr, blocksize, 1);
BUG_ON(ret);
continue;
}
@ -1321,8 +1334,8 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root
out:
WARN_ON(*level < 0);
WARN_ON(*level >= BTRFS_MAX_LEVEL);
ret = btrfs_free_extent(trans, root,
extent_buffer_blocknr(path->nodes[*level]), 1, 1);
ret = btrfs_free_extent(trans, root, path->nodes[*level]->start,
path->nodes[*level]->len, 1);
free_extent_buffer(path->nodes[*level]);
path->nodes[*level] = NULL;
*level += 1;
@ -1359,8 +1372,8 @@ static int walk_up_tree(struct btrfs_trans_handle *trans, struct btrfs_root
return 0;
} else {
ret = btrfs_free_extent(trans, root,
extent_buffer_blocknr(path->nodes[*level]),
1, 1);
path->nodes[*level]->start,
path->nodes[*level]->len, 1);
BUG_ON(ret);
free_extent_buffer(path->nodes[*level]);
path->nodes[*level] = NULL;
@ -1476,16 +1489,12 @@ int btrfs_read_block_groups(struct btrfs_root *root)
struct btrfs_key key;
struct btrfs_key found_key;
struct extent_buffer *leaf;
u64 group_size_blocks;
block_group_cache = &info->block_group_cache;
group_size_blocks = BTRFS_BLOCK_GROUP_SIZE >>
info->sb->s_blocksize_bits;
root = info->extent_root;
key.objectid = 0;
key.offset = group_size_blocks;
key.offset = BTRFS_BLOCK_GROUP_SIZE;
btrfs_set_key_type(&key, BTRFS_BLOCK_GROUP_ITEM_KEY);
path = btrfs_alloc_path();
@ -1532,7 +1541,7 @@ int btrfs_read_block_groups(struct btrfs_root *root)
(u64)cache);
if (key.objectid >=
btrfs_super_total_blocks(&info->super_copy))
btrfs_super_total_bytes(&info->super_copy))
break;
}

91
fs/btrfs/extent_map.c
View File

@ -1963,18 +1963,27 @@ static inline struct page *extent_buffer_page(struct extent_buffer *eb, int i)
struct page *p;
if (i == 0)
return eb->first_page;
i += eb->start >> PAGE_CACHE_SHIFT;
if (eb->last_page && eb->last_page->index == i)
return eb->last_page;
p = find_get_page(eb->first_page->mapping, i);
page_cache_release(p);
eb->last_page = p;
return p;
}
static inline unsigned long num_extent_pages(u64 start, u64 len)
{
return ((start + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) -
(start >> PAGE_CACHE_SHIFT);
}
struct extent_buffer *alloc_extent_buffer(struct extent_map_tree *tree,
u64 start, unsigned long len,
gfp_t mask)
{
unsigned long num_pages = ((start + len - 1) >> PAGE_CACHE_SHIFT) -
(start >> PAGE_CACHE_SHIFT) + 1;
unsigned long num_pages = num_extent_pages(start, len);
unsigned long i;
unsigned long index = start >> PAGE_CACHE_SHIFT;
struct extent_buffer *eb;
@ -1986,7 +1995,7 @@ struct extent_buffer *alloc_extent_buffer(struct extent_map_tree *tree,
if (!eb || IS_ERR(eb))
return NULL;
eb->alloc_addr = __builtin_return_address(0);
eb->alloc_addr = (unsigned long)__builtin_return_address(0);
eb->start = start;
eb->len = len;
atomic_set(&eb->refs, 1);
@ -1994,6 +2003,7 @@ struct extent_buffer *alloc_extent_buffer(struct extent_map_tree *tree,
for (i = 0; i < num_pages; i++, index++) {
p = find_or_create_page(mapping, index, mask | __GFP_HIGHMEM);
if (!p) {
WARN_ON(1);
/* make sure the free only frees the pages we've
* grabbed a reference on
*/
@ -2021,8 +2031,7 @@ struct extent_buffer *find_extent_buffer(struct extent_map_tree *tree,
u64 start, unsigned long len,
gfp_t mask)
{
unsigned long num_pages = ((start + len - 1) >> PAGE_CACHE_SHIFT) -
(start >> PAGE_CACHE_SHIFT) + 1;
unsigned long num_pages = num_extent_pages(start, len);
unsigned long i;
unsigned long index = start >> PAGE_CACHE_SHIFT;
struct extent_buffer *eb;
@ -2033,7 +2042,7 @@ struct extent_buffer *find_extent_buffer(struct extent_map_tree *tree,
if (!eb || IS_ERR(eb))
return NULL;
eb->alloc_addr = __builtin_return_address(0);
eb->alloc_addr = (unsigned long)__builtin_return_address(0);
eb->start = start;
eb->len = len;
atomic_set(&eb->refs, 1);
@ -2070,8 +2079,7 @@ void free_extent_buffer(struct extent_buffer *eb)
if (!atomic_dec_and_test(&eb->refs))
return;
num_pages = ((eb->start + eb->len - 1) >> PAGE_CACHE_SHIFT) -
(eb->start >> PAGE_CACHE_SHIFT) + 1;
num_pages = num_extent_pages(eb->start, eb->len);
if (eb->first_page)
page_cache_release(eb->first_page);
@ -2094,8 +2102,7 @@ int clear_extent_buffer_dirty(struct extent_map_tree *tree,
u64 end = start + eb->len - 1;
set = clear_extent_dirty(tree, start, end, GFP_NOFS);
num_pages = ((eb->start + eb->len - 1) >> PAGE_CACHE_SHIFT) -
(eb->start >> PAGE_CACHE_SHIFT) + 1;
num_pages = num_extent_pages(eb->start, eb->len);
for (i = 0; i < num_pages; i++) {
page = extent_buffer_page(eb, i);
@ -2145,8 +2152,7 @@ int set_extent_buffer_uptodate(struct extent_map_tree *tree,
struct page *page;
unsigned long num_pages;
num_pages = ((eb->start + eb->len - 1) >> PAGE_CACHE_SHIFT) -
(eb->start >> PAGE_CACHE_SHIFT) + 1;
num_pages = num_extent_pages(eb->start, eb->len);
set_extent_uptodate(tree, eb->start, eb->start + eb->len - 1,
GFP_NOFS);
@ -2191,8 +2197,7 @@ int read_extent_buffer_pages(struct extent_map_tree *tree,
return 0;
}
num_pages = ((eb->start + eb->len - 1) >> PAGE_CACHE_SHIFT) -
(eb->start >> PAGE_CACHE_SHIFT) + 1;
num_pages = num_extent_pages(eb->start, eb->len);
for (i = 0; i < num_pages; i++) {
page = extent_buffer_page(eb, i);
if (PageUptodate(page)) {
@ -2267,14 +2272,14 @@ void read_extent_buffer(struct extent_buffer *eb, void *dstv,
}
EXPORT_SYMBOL(read_extent_buffer);
int map_extent_buffer(struct extent_buffer *eb, unsigned long start,
unsigned long min_len,
char **token, char **map,
unsigned long *map_start,
unsigned long *map_len, int km)
static int __map_extent_buffer(struct extent_buffer *eb, unsigned long start,
unsigned long min_len, char **token, char **map,
unsigned long *map_start,
unsigned long *map_len, int km)
{
size_t offset = start & (PAGE_CACHE_SIZE - 1);
char *kaddr;
struct page *p;
size_t start_offset = eb->start & ((u64)PAGE_CACHE_SIZE - 1);
unsigned long i = (start_offset + start) >> PAGE_CACHE_SHIFT;
unsigned long end_i = (start_offset + start + min_len) >>
@ -2283,21 +2288,59 @@ int map_extent_buffer(struct extent_buffer *eb, unsigned long start,
if (i != end_i)
return -EINVAL;
WARN_ON(start > eb->len);
if (start >= eb->len) {
printk("bad start in map eb start %Lu len %lu caller start %lu min %lu\n", eb->start, eb->len, start, min_len);
WARN_ON(1);
}
if (i == 0) {
offset = start_offset;
*map_start = 0;
} else {
offset = 0;
*map_start = (i << PAGE_CACHE_SHIFT) - start_offset;
}
kaddr = kmap_atomic(extent_buffer_page(eb, i), km);
p = extent_buffer_page(eb, i);
WARN_ON(!PageUptodate(p));
kaddr = kmap_atomic(p, km);
*token = kaddr;
*map = kaddr + offset;
*map_len = PAGE_CACHE_SIZE - offset;
return 0;
}
int map_extent_buffer(struct extent_buffer *eb, unsigned long start,
unsigned long min_len,
char **token, char **map,
unsigned long *map_start,
unsigned long *map_len, int km)
{
int err;
int save = 0;
if (eb->map_token) {
if (start >= eb->map_start &&
start + min_len <= eb->map_start + eb->map_len) {
*token = eb->map_token;
*map = eb->kaddr;
*map_start = eb->map_start;
*map_len = eb->map_len;
return 0;
}
unmap_extent_buffer(eb, eb->map_token, km);
eb->map_token = NULL;
save = 1;
}
err = __map_extent_buffer(eb, start, min_len, token, map,
map_start, map_len, km);
if (!err && save) {
eb->map_token = *token;
eb->kaddr = *map;
eb->map_start = *map_start;
eb->map_len = *map_len;
}
return err;
}
EXPORT_SYMBOL(map_extent_buffer);
void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km)
@ -2574,7 +2617,6 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
((unsigned long)PAGE_CACHE_SIZE - 1);
src_off_in_page = src_end &
((unsigned long)PAGE_CACHE_SIZE - 1);
if (src_i == 0)
src_off_in_page += start_offset;
if (dst_i == 0)
@ -2582,14 +2624,13 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
cur = min(len, src_off_in_page + 1);
cur = min(cur, dst_off_in_page + 1);
move_pages(extent_buffer_page(dst, dst_i),
extent_buffer_page(dst, src_i),
dst_off_in_page - cur + 1,
src_off_in_page - cur + 1, cur);
dst_end -= cur - 1;
src_end -= cur - 1;
dst_end -= cur;
src_end -= cur;
len -= cur;
}
}

10
fs/btrfs/extent_map.h
View File

@ -70,7 +70,12 @@ struct extent_buffer {
struct list_head list;
struct list_head leak_list;
struct page *first_page;
struct page *last_page;
unsigned long alloc_addr;
char *map_token;
char *kaddr;
unsigned long map_start;
unsigned long map_len;
};
typedef struct extent_map *(get_extent_t)(struct inode *inode,
@ -147,11 +152,6 @@ static inline void extent_buffer_get(struct extent_buffer *eb)
atomic_inc(&eb->refs);
}
static inline u64 extent_buffer_blocknr(struct extent_buffer *eb)
{
return eb->start / 4096;
}
int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
unsigned long start,
unsigned long len);

10
fs/btrfs/file-item.c
View File

@ -27,8 +27,8 @@
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 objectid, u64 pos,
u64 offset, u64 disk_num_blocks,
u64 num_blocks)
u64 offset, u64 disk_num_bytes,
u64 num_bytes)
{
int ret = 0;
struct btrfs_file_extent_item *item;
@ -50,10 +50,10 @@ int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
leaf = path->nodes[0];
item = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
btrfs_set_file_extent_disk_blocknr(leaf, item, offset);
btrfs_set_file_extent_disk_num_blocks(leaf, item, disk_num_blocks);
btrfs_set_file_extent_disk_bytenr(leaf, item, offset);
btrfs_set_file_extent_disk_num_bytes(leaf, item, disk_num_bytes);
btrfs_set_file_extent_offset(leaf, item, 0);
btrfs_set_file_extent_num_blocks(leaf, item, num_blocks);
btrfs_set_file_extent_num_bytes(leaf, item, num_bytes);
btrfs_set_file_extent_generation(leaf, item, trans->transid);
btrfs_set_file_extent_type(leaf, item, BTRFS_FILE_EXTENT_REG);
btrfs_mark_buffer_dirty(leaf);

126
fs/btrfs/file.c
View File

@ -120,9 +120,9 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans,
btrfs_set_file_extent_type(leaf, ei, BTRFS_FILE_EXTENT_INLINE);
ptr = btrfs_file_extent_inline_start(ei);
kaddr = kmap_atomic(page, KM_USER0);
kaddr = kmap_atomic(page, KM_USER1);
write_extent_buffer(leaf, kaddr + page_offset, ptr, size);
kunmap_atomic(kaddr, KM_USER0);
kunmap_atomic(kaddr, KM_USER1);
btrfs_mark_buffer_dirty(leaf);
fail:
btrfs_free_path(path);
@ -142,11 +142,12 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
struct inode *inode = file->f_path.dentry->d_inode;
struct extent_map *em;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
u64 hint_block;
u64 num_blocks;
u64 hint_byte;
u64 num_bytes;
u64 start_pos;
u64 end_of_last_block;
u64 end_pos = pos + write_bytes;
u32 inline_size;
loff_t isize = i_size_read(inode);
em = alloc_extent_map(GFP_NOFS);
@ -156,11 +157,12 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
em->bdev = inode->i_sb->s_bdev;
start_pos = pos & ~((u64)root->sectorsize - 1);
num_blocks = (write_bytes + pos - start_pos + root->sectorsize - 1) >>
inode->i_blkbits;
num_bytes = (write_bytes + pos - start_pos +
root->sectorsize - 1) & ~((u64)root->sectorsize - 1);
down_read(&BTRFS_I(inode)->root->snap_sem);
end_of_last_block = start_pos + (num_blocks << inode->i_blkbits) - 1;
end_of_last_block = start_pos + num_bytes - 1;
lock_extent(em_tree, start_pos, end_of_last_block, GFP_NOFS);
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
@ -169,8 +171,8 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
goto out_unlock;
}
btrfs_set_trans_block_group(trans, inode);
inode->i_blocks += num_blocks << 3;
hint_block = 0;
inode->i_blocks += num_bytes >> 9;
hint_byte = 0;
if ((end_of_last_block & 4095) == 0) {
printk("strange end of last %Lu %zu %Lu\n", start_pos, write_bytes, end_of_last_block);
@ -191,11 +193,10 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
err = btrfs_drop_extents(trans, root, inode,
last_pos_in_file,
last_pos_in_file + hole_size,
&hint_block);
&hint_byte);
if (err)
goto failed;
hole_size >>= inode->i_blkbits;
err = btrfs_insert_file_extent(trans, root,
inode->i_ino,
last_pos_in_file,
@ -209,8 +210,10 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
* either allocate an extent for the new bytes or setup the key
* to show we are doing inline data in the extent
*/
inline_size = end_pos - start_pos;
if (isize >= PAGE_CACHE_SIZE || pos + write_bytes < inode->i_size ||
pos + write_bytes - start_pos > BTRFS_MAX_INLINE_DATA_SIZE(root)) {
inline_size >= BTRFS_MAX_INLINE_DATA_SIZE(root) ||
inline_size >= PAGE_CACHE_SIZE) {
u64 last_end;
for (i = 0; i < num_pages; i++) {
struct page *p = pages[i];
@ -224,10 +227,9 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
} else {
struct page *p = pages[0];
/* step one, delete the existing extents in this range */
/* FIXME blocksize != pagesize */
err = btrfs_drop_extents(trans, root, inode, start_pos,
(pos + write_bytes + root->sectorsize -1) &
~((u64)root->sectorsize - 1), &hint_block);
~((u64)root->sectorsize - 1), &hint_byte);
if (err)
goto failed;
@ -283,7 +285,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end)
*/
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,
u64 start, u64 end, u64 *hint_block)
u64 start, u64 end, u64 *hint_byte)
{
int ret;
struct btrfs_key key;
@ -346,8 +348,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
found_type = btrfs_file_extent_type(leaf, extent);
if (found_type == BTRFS_FILE_EXTENT_REG) {
extent_end = key.offset +
(btrfs_file_extent_num_blocks(leaf, extent) <<
inode->i_blkbits);
btrfs_file_extent_num_bytes(leaf, extent);
found_extent = 1;
} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
struct btrfs_item *item;
@ -386,17 +387,17 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
if (end < extent_end && end >= key.offset) {
if (found_extent) {
u64 disk_blocknr =
btrfs_file_extent_disk_blocknr(leaf,extent);
u64 disk_num_blocks =
btrfs_file_extent_disk_num_blocks(leaf,
u64 disk_bytenr =
btrfs_file_extent_disk_bytenr(leaf, extent);
u64 disk_num_bytes =
btrfs_file_extent_disk_num_bytes(leaf,
extent);
read_extent_buffer(leaf, &old,
(unsigned long)extent,
sizeof(old));
if (disk_blocknr != 0) {
if (disk_bytenr != 0) {
ret = btrfs_inc_extent_ref(trans, root,
disk_blocknr, disk_num_blocks);
disk_bytenr, disk_num_bytes);
BUG_ON(ret);
}
}
@ -410,21 +411,19 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
keep = 1;
WARN_ON(start & (root->sectorsize - 1));
if (found_extent) {
new_num = (start - key.offset) >>
inode->i_blkbits;
old_num = btrfs_file_extent_num_blocks(leaf,
extent);
*hint_block =
btrfs_file_extent_disk_blocknr(leaf,
extent);
if (btrfs_file_extent_disk_blocknr(leaf,
extent)) {
new_num = start - key.offset;
old_num = btrfs_file_extent_num_bytes(leaf,
extent);
*hint_byte =
btrfs_file_extent_disk_bytenr(leaf,
extent);
if (btrfs_file_extent_disk_bytenr(leaf,
extent)) {
inode->i_blocks -=
(old_num - new_num) << 3;
(old_num - new_num) >> 9;
}
btrfs_set_file_extent_num_blocks(leaf,
extent,
new_num);
btrfs_set_file_extent_num_bytes(leaf, extent,
new_num);
btrfs_mark_buffer_dirty(leaf);
} else {
WARN_ON(1);
@ -432,33 +431,32 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
}
/* delete the entire extent */
if (!keep) {
u64 disk_blocknr = 0;
u64 disk_num_blocks = 0;
u64 extent_num_blocks = 0;
u64 disk_bytenr = 0;
u64 disk_num_bytes = 0;
u64 extent_num_bytes = 0;
if (found_extent) {
disk_blocknr =
btrfs_file_extent_disk_blocknr(leaf,
disk_bytenr =
btrfs_file_extent_disk_bytenr(leaf,
extent);
disk_num_blocks =
btrfs_file_extent_disk_num_blocks(leaf,
extent);
extent_num_blocks =
btrfs_file_extent_num_blocks(leaf,
extent);
*hint_block =
btrfs_file_extent_disk_blocknr(leaf,
disk_num_bytes =
btrfs_file_extent_disk_num_bytes(leaf,
extent);
extent_num_bytes =
btrfs_file_extent_num_bytes(leaf, extent);
*hint_byte =
btrfs_file_extent_disk_bytenr(leaf,
extent);
}
ret = btrfs_del_item(trans, root, path);
/* TODO update progress marker and return */
BUG_ON(ret);
btrfs_release_path(root, path);
extent = NULL;
if (found_extent && disk_blocknr != 0) {
inode->i_blocks -= extent_num_blocks << 3;
if (found_extent && disk_bytenr != 0) {
inode->i_blocks -= extent_num_bytes >> 9;
ret = btrfs_free_extent(trans, root,
disk_blocknr,
disk_num_blocks, 0);
disk_bytenr,
disk_num_bytes, 0);
}
BUG_ON(ret);
@ -491,20 +489,19 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
(unsigned long)extent, sizeof(old));
btrfs_set_file_extent_offset(leaf, extent,
le64_to_cpu(old.offset) +
((end - key.offset) >> inode->i_blkbits));
WARN_ON(le64_to_cpu(old.num_blocks) <
(extent_end - end) >> inode->i_blkbits);
btrfs_set_file_extent_num_blocks(leaf, extent,
(extent_end - end) >> inode->i_blkbits);
le64_to_cpu(old.offset) + end - key.offset);
WARN_ON(le64_to_cpu(old.num_bytes) <
(extent_end - end));
btrfs_set_file_extent_num_bytes(leaf, extent,
extent_end - end);
btrfs_set_file_extent_type(leaf, extent,
BTRFS_FILE_EXTENT_REG);
btrfs_mark_buffer_dirty(path->nodes[0]);
if (le64_to_cpu(old.disk_blocknr) != 0) {
if (le64_to_cpu(old.disk_bytenr) != 0) {
inode->i_blocks +=
btrfs_file_extent_num_blocks(leaf,
extent) << 3;
btrfs_file_extent_num_bytes(leaf,
extent) >> 9;
}
ret = 0;
goto out;
@ -531,12 +528,9 @@ static int prepare_pages(struct btrfs_root *root,
unsigned long index = pos >> PAGE_CACHE_SHIFT;
struct inode *inode = file->f_path.dentry->d_inode;
int err = 0;
u64 num_blocks;
u64 start_pos;
start_pos = pos & ~((u64)root->sectorsize - 1);
num_blocks = (write_bytes + pos - start_pos + root->sectorsize - 1) >>
inode->i_blkbits;
memset(pages, 0, num_pages * sizeof(struct page *));

90
fs/btrfs/inode.c
View File

@ -77,19 +77,19 @@ static int run_delalloc_range(struct inode *inode, u64 start, u64 end)
struct btrfs_trans_handle *trans;
struct btrfs_key ins;
u64 alloc_hint = 0;
u64 num_blocks;
u64 num_bytes;
int ret;
u64 blocksize = 1 << inode->i_blkbits;
u64 blocksize = root->sectorsize;
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
BUG_ON(!trans);
num_blocks = (end - start + blocksize) & ~(blocksize - 1);
num_bytes = (end - start + blocksize) & ~(blocksize - 1);
ret = btrfs_drop_extents(trans, root, inode,
start, start + num_blocks, &alloc_hint);
num_blocks = num_blocks >> inode->i_blkbits;
ret = btrfs_alloc_extent(trans, root, inode->i_ino, num_blocks, 0,
start, start + num_bytes, &alloc_hint);
ret = btrfs_alloc_extent(trans, root, inode->i_ino, num_bytes, 0,
alloc_hint, (u64)-1, &ins, 1);
if (ret) {
WARN_ON(1);
@ -186,7 +186,8 @@ int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end)
zeroit:
printk("btrfs csum failed ino %lu off %llu\n",
page->mapping->host->i_ino, (unsigned long long)start);
memset(kaddr + offset, 1, end - start + 1); flush_dcache_page(page);
memset(kaddr + offset, 1, end - start + 1);
flush_dcache_page(page);
kunmap_atomic(kaddr, KM_IRQ0);
return 0;
}
@ -547,7 +548,7 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
struct extent_buffer *leaf;
struct btrfs_file_extent_item *fi;
u64 extent_start = 0;
u64 extent_num_blocks = 0;
u64 extent_num_bytes = 0;
u64 item_end = 0;
int found_extent;
int del_item;
@ -593,8 +594,7 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
if (btrfs_file_extent_type(leaf, fi) !=
BTRFS_FILE_EXTENT_INLINE) {
item_end +=
btrfs_file_extent_num_blocks(leaf, fi) <<
inode->i_blkbits;
btrfs_file_extent_num_bytes(leaf, fi);
}
}
if (found_type == BTRFS_CSUM_ITEM_KEY) {
@ -626,28 +626,27 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
btrfs_file_extent_type(leaf, fi) !=
BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
extent_start = btrfs_file_extent_disk_blocknr(leaf, fi);
extent_start = btrfs_file_extent_disk_bytenr(leaf, fi);
if (!del_item) {
u64 orig_num_blocks =
btrfs_file_extent_num_blocks(leaf, fi);
extent_num_blocks = inode->i_size -
u64 orig_num_bytes =
btrfs_file_extent_num_bytes(leaf, fi);
extent_num_bytes = inode->i_size -
found_key.offset + root->sectorsize - 1;
extent_num_blocks >>= inode->i_blkbits;
btrfs_set_file_extent_num_blocks(leaf, fi,
extent_num_blocks);
num_dec = (orig_num_blocks -
extent_num_blocks) << 3;
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_num_bytes);
num_dec = (orig_num_bytes -
extent_num_bytes) >> 9;
if (extent_start != 0) {
inode->i_blocks -= num_dec;
}
btrfs_mark_buffer_dirty(leaf);
} else {
extent_num_blocks =
btrfs_file_extent_disk_num_blocks(leaf,
fi);
extent_num_bytes =
btrfs_file_extent_disk_num_bytes(leaf,
fi);
/* FIXME blocksize != 4096 */
num_dec = btrfs_file_extent_num_blocks(leaf,
fi) << 3;
num_dec = btrfs_file_extent_num_bytes(leaf,
fi) >> 9;
if (extent_start != 0) {
found_extent = 1;
inode->i_blocks -= num_dec;
@ -664,7 +663,7 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
btrfs_release_path(root, path);
if (found_extent) {
ret = btrfs_free_extent(trans, root, extent_start,
extent_num_blocks, 0);
extent_num_bytes, 0);
BUG_ON(ret);
}
}
@ -709,7 +708,8 @@ static int btrfs_cow_one_page(struct inode *inode, struct page *page,
static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
{
struct inode *inode = mapping->host;
unsigned blocksize = 1 << inode->i_blkbits;
struct btrfs_root *root = BTRFS_I(inode)->root;
u32 blocksize = root->sectorsize;
pgoff_t index = from >> PAGE_CACHE_SHIFT;
unsigned offset = from & (PAGE_CACHE_SIZE-1);
struct page *page;
@ -719,7 +719,7 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
if ((offset & (blocksize - 1)) == 0)
goto out;
down_read(&BTRFS_I(inode)->root->snap_sem);
down_read(&root->snap_sem);
ret = -ENOMEM;
page = grab_cache_page(mapping, index);
if (!page)
@ -778,8 +778,6 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
err = btrfs_drop_extents(trans, root, inode,
pos, pos + hole_size, &alloc_hint);
hole_size >>= inode->i_blkbits;
err = btrfs_insert_file_extent(trans, root, inode->i_ino,
pos, 0, 0, hole_size);
btrfs_end_transaction(trans, root);
@ -1490,7 +1488,7 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
{
int ret;
int err = 0;
u64 blocknr;
u64 bytenr;
u64 extent_start = 0;
u64 extent_end = 0;
u64 objectid = inode->i_ino;
@ -1540,10 +1538,6 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
leaf = path->nodes[0];
item = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
blocknr = btrfs_file_extent_disk_blocknr(leaf, item);
blocknr += btrfs_file_extent_offset(leaf, item);
/* are we inside the extent that was found? */
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
found_type = btrfs_key_type(&found_key);
@ -1556,8 +1550,7 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
extent_start = found_key.offset;
if (found_type == BTRFS_FILE_EXTENT_REG) {
extent_end = extent_start +
(btrfs_file_extent_num_blocks(leaf, item) <<
inode->i_blkbits);
btrfs_file_extent_num_bytes(leaf, item);
err = 0;
if (start < extent_start || start >= extent_end) {
em->start = start;
@ -1570,17 +1563,18 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
}
goto not_found_em;
}
if (btrfs_file_extent_disk_blocknr(leaf, item) == 0) {
bytenr = btrfs_file_extent_disk_bytenr(leaf, item);
if (bytenr == 0) {
em->start = extent_start;
em->end = extent_end - 1;
em->block_start = EXTENT_MAP_HOLE;
em->block_end = EXTENT_MAP_HOLE;
goto insert;
}
em->block_start = blocknr << inode->i_blkbits;
bytenr += btrfs_file_extent_offset(leaf, item);
em->block_start = bytenr;
em->block_end = em->block_start +
(btrfs_file_extent_num_blocks(leaf, item) <<
inode->i_blkbits) - 1;
btrfs_file_extent_num_bytes(leaf, item) - 1;
em->start = extent_start;
em->end = extent_end - 1;
goto insert;
@ -1592,7 +1586,8 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
size = btrfs_file_extent_inline_len(leaf, btrfs_item_nr(leaf,
path->slots[0]));
extent_end = extent_start | ((u64)root->sectorsize - 1);
extent_end = (extent_start + size) |
((u64)root->sectorsize - 1);
if (start < extent_start || start >= extent_end) {
em->start = start;
if (start < extent_start) {
@ -1617,8 +1612,10 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
ptr = btrfs_file_extent_inline_start(item);
map = kmap(page);
read_extent_buffer(leaf, map + page_offset, ptr, size);
/*
memset(map + page_offset + size, 0,
root->sectorsize - (page_offset + size));
*/
flush_dcache_page(page);
kunmap(page);
set_extent_uptodate(em_tree, extent_start,
@ -1836,13 +1833,13 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen)
trans = btrfs_start_transaction(root, 1);
BUG_ON(!trans);
leaf = btrfs_alloc_free_block(trans, root, 0, 0);
leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, 0);
if (IS_ERR(leaf))
return PTR_ERR(leaf);
btrfs_set_header_nritems(leaf, 0);
btrfs_set_header_level(leaf, 0);
btrfs_set_header_blocknr(leaf, extent_buffer_blocknr(leaf));
btrfs_set_header_bytenr(leaf, leaf->start);
btrfs_set_header_generation(leaf, trans->transid);
btrfs_set_header_owner(leaf, root->root_key.objectid);
write_extent_buffer(leaf, root->fs_info->fsid,
@ -1858,7 +1855,8 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen)
inode_item->nblocks = cpu_to_le64(1);
inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
btrfs_set_root_blocknr(&root_item, extent_buffer_blocknr(leaf));
btrfs_set_root_bytenr(&root_item, leaf->start);
btrfs_set_root_level(&root_item, 0);
btrfs_set_root_refs(&root_item, 1);
btrfs_set_root_used(&root_item, 0);
@ -1971,8 +1969,8 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);
btrfs_set_root_blocknr(&new_root_item,
extent_buffer_blocknr(root->node));
btrfs_set_root_bytenr(&new_root_item, root->node->start);
btrfs_set_root_level(&new_root_item, btrfs_header_level(root->node));
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&new_root_item);

23
fs/btrfs/print-tree.c
View File

@ -36,7 +36,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
u32 type;
printk("leaf %llu total ptrs %d free space %d\n",
(unsigned long long)btrfs_header_blocknr(l), nr,
(unsigned long long)btrfs_header_bytenr(l), nr,
btrfs_leaf_free_space(root, l));
for (i = 0 ; i < nr ; i++) {
item = btrfs_item_nr(l, i);
@ -65,8 +65,8 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
break;
case BTRFS_ROOT_ITEM_KEY:
ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
printk("\t\troot data blocknr %llu refs %u\n",
(unsigned long long)btrfs_disk_root_blocknr(l, ri),
printk("\t\troot data bytenr %llu refs %u\n",
(unsigned long long)btrfs_disk_root_bytenr(l, ri),
btrfs_disk_root_refs(l, ri));
break;
case BTRFS_EXTENT_ITEM_KEY:
@ -84,12 +84,12 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
btrfs_file_extent_inline_len(l, item));
break;
}
printk("\t\textent data disk block %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_disk_blocknr(l, fi),
(unsigned long long)btrfs_file_extent_disk_num_blocks(l, fi));
printk("\t\textent data disk bytenr %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_disk_bytenr(l, fi),
(unsigned long long)btrfs_file_extent_disk_num_bytes(l, fi));
printk("\t\textent data offset %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_offset(l, fi),
(unsigned long long)btrfs_file_extent_num_blocks(l, fi));
(unsigned long long)btrfs_file_extent_num_bytes(l, fi));
break;
case BTRFS_BLOCK_GROUP_ITEM_KEY:
bi = btrfs_item_ptr(l, i,
@ -106,16 +106,18 @@ void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
int i;
u32 nr;
struct btrfs_key key;
int level;
if (!c)
return;
nr = btrfs_header_nritems(c);
if (btrfs_is_leaf(c)) {
level = btrfs_header_level(c);
if (level == 0) {
btrfs_print_leaf(root, c);
return;
}
printk("node %llu level %d total ptrs %d free spc %u\n",
(unsigned long long)btrfs_header_blocknr(c),
(unsigned long long)btrfs_header_bytenr(c),
btrfs_header_level(c), nr,
(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
for (i = 0; i < nr; i++) {
@ -129,7 +131,8 @@ void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
}
for (i = 0; i < nr; i++) {
struct extent_buffer *next = read_tree_block(root,
btrfs_node_blockptr(c, i));
btrfs_node_blockptr(c, i),
btrfs_level_size(root, level - 1));
if (btrfs_is_leaf(next) &&
btrfs_header_level(c) != 1)
BUG();

6
fs/btrfs/super.c
View File

@ -303,10 +303,12 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct btrfs_root *root = btrfs_sb(dentry->d_sb);
struct btrfs_super_block *disk_super = &root->fs_info->super_copy;
int bits = dentry->d_sb->s_blocksize_bits;
buf->f_namelen = BTRFS_NAME_LEN;
buf->f_blocks = btrfs_super_total_blocks(disk_super);
buf->f_bfree = buf->f_blocks - btrfs_super_blocks_used(disk_super);
buf->f_blocks = btrfs_super_total_bytes(disk_super) >> bits;
buf->f_bfree = buf->f_blocks -
(btrfs_super_bytes_used(disk_super) >> bits);
buf->f_bavail = buf->f_bfree;
buf->f_bsize = dentry->d_sb->s_blocksize;
buf->f_type = BTRFS_SUPER_MAGIC;

5
fs/btrfs/sysfs.c
View File

@ -42,14 +42,15 @@ static ssize_t root_block_limit_show(struct btrfs_root *root, char *buf)
static ssize_t super_blocks_used_show(struct btrfs_fs_info *fs, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%llu\n",
(unsigned long long)btrfs_super_blocks_used(&fs->super_copy));
(unsigned long long)btrfs_super_bytes_used(&fs->super_copy));
}
static ssize_t super_total_blocks_show(struct btrfs_fs_info *fs, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%llu\n",
(unsigned long long)btrfs_super_total_blocks(&fs->super_copy));
(unsigned long long)btrfs_super_total_bytes(&fs->super_copy));
}
static ssize_t super_blocksize_show(struct btrfs_fs_info *fs, char *buf)

39
fs/btrfs/transaction.c
View File

@ -205,12 +205,13 @@ int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
btrfs_write_dirty_block_groups(trans, extent_root);
while(1) {
old_extent_block = btrfs_root_blocknr(&extent_root->root_item);
if (old_extent_block ==
extent_buffer_blocknr(extent_root->node))
old_extent_block = btrfs_root_bytenr(&extent_root->root_item);
if (old_extent_block == extent_root->node->start)
break;
btrfs_set_root_blocknr(&extent_root->root_item,
extent_buffer_blocknr(extent_root->node));
btrfs_set_root_bytenr(&extent_root->root_item,
extent_root->node->start);
btrfs_set_root_level(&extent_root->root_item,
btrfs_header_level(extent_root->node));
ret = btrfs_update_root(trans, tree_root,
&extent_root->root_key,
&extent_root->root_item);
@ -284,8 +285,8 @@ static int add_dirty_roots(struct btrfs_trans_handle *trans,
(unsigned long)root->root_key.objectid,
BTRFS_ROOT_TRANS_TAG);
if (root->commit_root == root->node) {
WARN_ON(extent_buffer_blocknr(root->node) !=
btrfs_root_blocknr(&root->root_item));
WARN_ON(root->node->start !=
btrfs_root_bytenr(&root->root_item));
free_extent_buffer(root->commit_root);
root->commit_root = NULL;
@ -314,8 +315,10 @@ static int add_dirty_roots(struct btrfs_trans_handle *trans,
root->commit_root = NULL;
root->root_key.offset = root->fs_info->generation;
btrfs_set_root_blocknr(&root->root_item,
extent_buffer_blocknr(root->node));
btrfs_set_root_bytenr(&root->root_item,
root->node->start);
btrfs_set_root_level(&root->root_item,
btrfs_header_level(root->node));
err = btrfs_insert_root(trans, root->fs_info->tree_root,
&root->root_key,
&root->root_item);
@ -407,8 +410,8 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
struct dirty_root *dirty;
struct btrfs_trans_handle *trans;
unsigned long nr;
u64 num_blocks;
u64 blocks_used;
u64 num_bytes;
u64 bytes_used;
int ret = 0;
int err;
@ -419,7 +422,7 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
dirty = list_entry(list->next, struct dirty_root, list);
list_del_init(&dirty->list);
num_blocks = btrfs_root_used(&dirty->root->root_item);
num_bytes = btrfs_root_used(&dirty->root->root_item);
root = dirty->latest_root;
while(1) {
@ -446,12 +449,12 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
}
BUG_ON(ret);
num_blocks -= btrfs_root_used(&dirty->root->root_item);
blocks_used = btrfs_root_used(&root->root_item);
if (num_blocks) {
num_bytes -= btrfs_root_used(&dirty->root->root_item);
bytes_used = btrfs_root_used(&root->root_item);
if (num_bytes) {
record_root_in_trans(root);
btrfs_set_root_used(&root->root_item,
blocks_used - num_blocks);
bytes_used - num_bytes);
}
ret = btrfs_del_root(trans, tree_root, &dirty->root->root_key);
if (ret) {
@ -560,7 +563,9 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_set_super_generation(&root->fs_info->super_copy,
cur_trans->transid);
btrfs_set_super_root(&root->fs_info->super_copy,
extent_buffer_blocknr(root->fs_info->tree_root->node));
root->fs_info->tree_root->node->start);
btrfs_set_super_root_level(&root->fs_info->super_copy,
btrfs_header_level(root->fs_info->tree_root->node));
write_extent_buffer(root->fs_info->sb_buffer,
&root->fs_info->super_copy, 0,

18
fs/btrfs/tree-defrag.c
View File

@ -27,13 +27,15 @@ static void reada_defrag(struct btrfs_root *root,
{
int i;
u32 nritems;
u64 blocknr;
u64 bytenr;
u32 blocksize;
int ret;
blocksize = btrfs_level_size(root, btrfs_header_level(node) - 1);
nritems = btrfs_header_nritems(node);
for (i = 0; i < nritems; i++) {
blocknr = btrfs_node_blockptr(node, i);
ret = readahead_tree_block(root, blocknr);
bytenr = btrfs_node_blockptr(node, i);
ret = readahead_tree_block(root, bytenr, blocksize);
if (ret)
break;
}
@ -46,7 +48,7 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
{
struct extent_buffer *next;
struct extent_buffer *cur;
u64 blocknr;
u64 bytenr;
int ret = 0;
int is_extent = 0;
@ -80,10 +82,11 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
break;
}
blocknr = btrfs_node_blockptr(cur, path->slots[*level]);
bytenr = btrfs_node_blockptr(cur, path->slots[*level]);
if (cache_only) {
next = btrfs_find_tree_block(root, blocknr);
next = btrfs_find_tree_block(root, bytenr,
btrfs_level_size(root, *level - 1));
/* FIXME, test for defrag */
if (!next || !btrfs_buffer_uptodate(next)) {
free_extent_buffer(next);
@ -91,7 +94,8 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
continue;
}
} else {
next = read_tree_block(root, blocknr);
next = read_tree_block(root, bytenr,
btrfs_level_size(root, *level - 1));
}
ret = btrfs_cow_block(trans, root, next, path->nodes[*level],
path->slots[*level], &next);