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Btrfs: add owner and type fields to the extents aand block headers 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-04-20 20:23:12 -04:00 committed by David Woodhouse
parent 33ade1f826
commit 4d77567309
5 changed files with 65 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/btrfs/ctree.c
View File

@ -68,6 +68,7 @@ static int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root
memcpy(cow_node, btrfs_buffer_node(buf), root->blocksize);
btrfs_set_header_blocknr(&cow_node->header, bh_blocknr(cow));
btrfs_set_header_generation(&cow_node->header, trans->transid);
btrfs_set_header_owner(&cow_node->header, root->root_key.objectid);
btrfs_inc_ref(trans, root, buf);
if (buf == root->node) {
root->node = cow;
@ -806,6 +807,7 @@ static int insert_new_root(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_header_level(&c->header, level);
btrfs_set_header_blocknr(&c->header, bh_blocknr(t));
btrfs_set_header_generation(&c->header, trans->transid);
btrfs_set_header_owner(&c->header, root->root_key.objectid);
lower = btrfs_buffer_node(path->nodes[level-1]);
memcpy(c->header.fsid, root->fs_info->disk_super->fsid,
sizeof(c->header.fsid));
@ -909,6 +911,7 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_header_level(&split->header, btrfs_header_level(&c->header));
btrfs_set_header_blocknr(&split->header, bh_blocknr(split_buffer));
btrfs_set_header_generation(&split->header, trans->transid);
btrfs_set_header_owner(&split->header, root->root_key.objectid);
memcpy(split->header.fsid, root->fs_info->disk_super->fsid,
sizeof(split->header.fsid));
mid = (c_nritems + 1) / 2;
@ -1280,6 +1283,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
memset(&right->header, 0, sizeof(right->header));
btrfs_set_header_blocknr(&right->header, bh_blocknr(right_buffer));
btrfs_set_header_generation(&right->header, trans->transid);
btrfs_set_header_owner(&right->header, root->root_key.objectid);
btrfs_set_header_level(&right->header, 0);
memcpy(right->header.fsid, root->fs_info->disk_super->fsid,
sizeof(right->header.fsid));
@ -1376,6 +1380,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
memset(&right->header, 0, sizeof(right->header));
btrfs_set_header_blocknr(&right->header, bh_blocknr(right_buffer));
btrfs_set_header_generation(&right->header, trans->transid);
btrfs_set_header_owner(&right->header, root->root_key.objectid);
btrfs_set_header_level(&right->header, 0);
memcpy(right->header.fsid, root->fs_info->disk_super->fsid,
sizeof(right->header.fsid));

45
fs/btrfs/ctree.h
View File

@ -62,6 +62,7 @@ struct btrfs_header {
u8 fsid[16]; /* FS specific uuid */
__le64 blocknr; /* which block this node is supposed to live in */
__le64 generation;
__le64 owner;
__le16 nritems;
__le16 flags;
u8 level;
@ -151,12 +152,17 @@ struct btrfs_path {
int slots[BTRFS_MAX_LEVEL];
};
/* values for the type field in btrfs_extent_item */
#define BTRFS_EXTENT_TREE 1
#define BTRFS_EXTENT_FILE 2
/*
* items in the extent btree are used to record the objectid of the
* owner of the block and the number of references
*/
struct btrfs_extent_item {
__le32 refs;
__le64 owner;
u8 type;
} __attribute__ ((__packed__));
struct btrfs_inode_timespec {
@ -473,11 +479,32 @@ static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val)
ei->refs = cpu_to_le32(val);
}
static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei)
{
return le64_to_cpu(ei->owner);
}
static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val)
{
ei->owner = cpu_to_le64(val);
}
static inline u8 btrfs_extent_type(struct btrfs_extent_item *ei)
{
return ei->type;
}
static inline void btrfs_set_extent_type(struct btrfs_extent_item *ei, u8 val)
{
ei->type = val;
}
static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr)
{
return le64_to_cpu(n->ptrs[nr].blockptr);
}
static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr,
u64 val)
{
@ -636,6 +663,17 @@ static inline void btrfs_set_header_generation(struct btrfs_header *h,
h->generation = cpu_to_le64(val);
}
static inline u64 btrfs_header_owner(struct btrfs_header *h)
{
return le64_to_cpu(h->owner);
}
static inline void btrfs_set_header_owner(struct btrfs_header *h,
u64 val)
{
h->owner = cpu_to_le64(val);
}
static inline u16 btrfs_header_nritems(struct btrfs_header *h)
{
return le16_to_cpu(h->nritems);
@ -996,9 +1034,10 @@ int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*root, u64 num_blocks, u64 search_start, u64
search_end, struct btrfs_key *ins);
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 owner,
u8 type, u64 num_blocks, u64 search_start,
u64 search_end, struct btrfs_key *ins);
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct buffer_head *buf);
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root

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

@ -319,6 +319,7 @@ static int __setup_root(int blocksize,
root->last_inode_alloc = 0;
memset(&root->root_key, 0, sizeof(root->root_key));
memset(&root->root_item, 0, sizeof(root->root_item));
root->root_key.objectid = objectid;
return 0;
}

15
fs/btrfs/extent-tree.c
View File

@ -460,9 +460,10 @@ error:
*
* returns 0 if everything worked, non-zero otherwise.
*/
int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*root, u64 num_blocks, u64 search_start, u64
search_end, struct btrfs_key *ins)
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 owner,
u8 type, u64 num_blocks, u64 search_start,
u64 search_end, struct btrfs_key *ins)
{
int ret;
int pending_ret;
@ -472,6 +473,8 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root
struct btrfs_extent_item extent_item;
btrfs_set_extent_refs(&extent_item, 1);
btrfs_set_extent_owner(&extent_item, owner);
btrfs_set_extent_type(&extent_item, type);
if (root == extent_root) {
BUG_ON(extent_root->fs_info->current_insert.offset == 0);
@ -508,13 +511,15 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root
* returns the tree buffer or NULL.
*/
struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
struct btrfs_root *root)
{
struct btrfs_key ins;
int ret;
struct buffer_head *buf;
ret = btrfs_alloc_extent(trans, root, 1, 0, (unsigned long)-1, &ins);
ret = btrfs_alloc_extent(trans, root, root->root_key.objectid,
BTRFS_EXTENT_TREE,
1, 0, (unsigned long)-1, &ins);
if (ret) {
BUG();
return NULL;

13
fs/btrfs/super.c
View File

@ -1819,8 +1819,9 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
}
if (inode->i_size >= PAGE_CACHE_SIZE || pos + count < inode->i_size ||
pos + count - start_pos > BTRFS_MAX_INLINE_DATA_SIZE(root)) {
ret = btrfs_alloc_extent(trans, root, num_blocks, 1,
(u64)-1, &ins);
ret = btrfs_alloc_extent(trans, root, inode->i_ino,
BTRFS_EXTENT_FILE, num_blocks, 1,
(u64)-1, &ins);
BUG_ON(ret);
ret = btrfs_insert_file_extent(trans, root, inode->i_ino,
start_pos, ins.objectid, ins.offset);
@ -2017,8 +2018,12 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen)
btrfs_set_header_level(&leaf->header, 0);
btrfs_set_header_blocknr(&leaf->header, bh_blocknr(subvol));
btrfs_set_header_generation(&leaf->header, trans->transid);
btrfs_set_header_owner(&leaf->header, root->root_key.objectid);
memcpy(leaf->header.fsid, root->fs_info->disk_super->fsid,
sizeof(leaf->header.fsid));
mark_buffer_dirty(subvol);
brelse(subvol);
subvol = NULL;
inode_item = &root_item.inode;
memset(inode_item, 0, sizeof(*inode_item));
@ -2031,10 +2036,6 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen)
btrfs_set_root_blocknr(&root_item, bh_blocknr(subvol));
btrfs_set_root_refs(&root_item, 1);
mark_buffer_dirty(subvol);
brelse(subvol);
subvol = NULL;
ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
0, &objectid);
BUG_ON(ret);