Btrfs: Allow tree blocks larger than the page size
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 2b86a1d..fad9298 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -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 @@
#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 @@
.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 @@
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 @@
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 @@
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 @@
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_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 @@
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 @@
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 *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 @@
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 @@
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 @@
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 @@
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 @@
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);
}