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Btrfs: tweak the inode-map and free extent search starts on cold mount 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-04-04 15:27:52 -04:00 committed by David Woodhouse
parent e8f05c4508
commit b1a4d96509
5 changed files with 42 additions and 16 deletions
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2
fs/btrfs/TODO
View File

@ -1,9 +1,7 @@
* cleanup, add more error checking, get rid of BUG_ONs
* Fix ENOSPC handling
* Do checksumming
* Add block mapping tree (simple dm layer)
* Make allocator smarter
* make level a field in header
* add a block group to struct inode
* Make directory hashing work on 32 bit
* Make sure nobh stuff is working properly for cows

1
fs/btrfs/ctree.h
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@ -238,7 +238,6 @@ struct btrfs_fs_info {
struct radix_tree_root pending_del_radix;
struct radix_tree_root pinned_radix;
u64 last_inode_alloc;
u64 last_inode_alloc_dirid;
u64 generation;
struct btrfs_transaction *running_transaction;
struct btrfs_super_block *disk_super;

1
fs/btrfs/disk-io.c
View File

@ -311,7 +311,6 @@ struct btrfs_root *open_ctree(struct super_block *sb)
fs_info->extent_root = extent_root;
fs_info->inode_root = inode_root;
fs_info->last_inode_alloc = 0;
fs_info->last_inode_alloc_dirid = 0;
fs_info->sb = sb;
fs_info->btree_inode = new_inode(sb);
fs_info->btree_inode->i_ino = 1;

21
fs/btrfs/extent-tree.c
View File

@ -339,13 +339,30 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
int total_needed = num_blocks;
int level;
path = btrfs_alloc_path();
ins->flags = 0;
btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY);
level = btrfs_header_level(btrfs_buffer_header(root->node));
total_needed += (level + 1) * 3;
if (root->fs_info->last_insert.objectid == 0 && search_end == (u64)-1) {
struct btrfs_disk_key *last_key;
btrfs_init_path(path);
ins->objectid = (u64)-1;
ins->offset = (u64)-1;
ret = btrfs_search_slot(trans, root, ins, path, 0, 0);
if (ret < 0)
goto error;
BUG_ON(ret == 0);
if (path->slots[0] > 0)
path->slots[0]--;
l = btrfs_buffer_leaf(path->nodes[0]);
last_key = &l->items[path->slots[0]].key;
search_start = btrfs_disk_key_objectid(last_key);
}
if (root->fs_info->last_insert.objectid > search_start)
search_start = root->fs_info->last_insert.objectid;
ins->flags = 0;
btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY);
path = btrfs_alloc_path();
check_failed:

33
fs/btrfs/inode-map.c
View File

@ -22,17 +22,31 @@ int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
struct btrfs_key search_key;
u64 search_start = dirid;
if (fs_root->fs_info->last_inode_alloc_dirid == dirid)
search_start = fs_root->fs_info->last_inode_alloc;
search_start = max(search_start, BTRFS_FIRST_FREE_OBJECTID);
search_key.objectid = search_start;
search_key.flags = 0;
btrfs_set_key_type(&search_key, BTRFS_INODE_MAP_ITEM_KEY);
search_key.offset = 0;
path = btrfs_alloc_path();
BUG_ON(!path);
search_key.flags = 0;
btrfs_set_key_type(&search_key, BTRFS_INODE_MAP_ITEM_KEY);
search_start = fs_root->fs_info->last_inode_alloc;
if (search_start == 0) {
struct btrfs_disk_key *last_key;
btrfs_init_path(path);
search_key.objectid = (u64)-1;
search_key.offset = (u64)-1;
ret = btrfs_search_slot(trans, root, &search_key, path, 0, 0);
if (ret < 0)
goto error;
BUG_ON(ret == 0);
if (path->slots[0] > 0)
path->slots[0]--;
l = btrfs_buffer_leaf(path->nodes[0]);
last_key = &l->items[path->slots[0]].key;
search_start = btrfs_disk_key_objectid(last_key);
}
search_start = max(search_start, BTRFS_FIRST_FREE_OBJECTID);
search_key.objectid = search_start;
search_key.offset = 0;
btrfs_init_path(path);
start_found = 0;
ret = btrfs_search_slot(trans, root, &search_key, path, 0, 0);
@ -79,7 +93,6 @@ int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
// FIXME -ENOSPC
found:
root->fs_info->last_inode_alloc = *objectid;
root->fs_info->last_inode_alloc_dirid = dirid;
btrfs_release_path(root, path);
btrfs_free_path(path);
BUG_ON(*objectid < search_start);