if (alloc_hint == EXTENT_MAP_INLINE)
goto out;
- ret = btrfs_alloc_extent(trans, root, inode->i_ino, num_bytes, 0,
+ ret = btrfs_alloc_extent(trans, root, num_bytes,
+ root->root_key.objectid, trans->transid,
+ inode->i_ino, start, 0,
alloc_hint, (u64)-1, &ins, 1);
if (ret) {
WARN_ON(1);
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
char *kaddr;
- int ret;
+ int ret = 0;
u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
size_t offset = start - page_start;
+ if (btrfs_test_opt(root, NODATASUM))
+ return 0;
+
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
struct btrfs_path *path = NULL;
u32 csum;
+ if (btrfs_test_opt(root, NODATASUM))
+ return 0;
+
mutex_lock(&root->fs_info->fs_mutex);
path = btrfs_alloc_path();
item = btrfs_lookup_csum(NULL, root, path, inode->i_ino, start, 0);
u32 csum = ~(u32)0;
unsigned long flags;
+ if (btrfs_test_opt(root, NODATASUM))
+ return 0;
+
ret = get_state_private(em_tree, start, &private);
local_irq_save(flags);
kaddr = kmap_atomic(page, KM_IRQ0);
ret = btrfs_delete_one_dir_name(trans, root, path, di);
dentry->d_inode->i_ctime = dir->i_ctime;
+ ret = btrfs_del_inode_ref(trans, root, name, name_len,
+ dentry->d_inode->i_ino,
+ dentry->d_parent->d_inode->i_ino);
+ if (ret) {
+ printk("failed to delete reference to %.*s, "
+ "inode %lu parent %lu\n", name_len, name,
+ dentry->d_inode->i_ino,
+ dentry->d_parent->d_inode->i_ino);
+ }
err:
btrfs_free_path(path);
if (!ret) {
int err;
int ret;
struct btrfs_root *root = BTRFS_I(dir)->root;
- struct btrfs_path *path;
- struct btrfs_key key;
struct btrfs_trans_handle *trans;
- struct btrfs_key found_key;
- int found_type;
- struct extent_buffer *leaf;
- char *goodnames = "..";
unsigned long nr;
if (inode->i_size > BTRFS_EMPTY_DIR_SIZE)
return -ENOTEMPTY;
- path = btrfs_alloc_path();
- BUG_ON(!path);
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
-
btrfs_set_trans_block_group(trans, dir);
- key.objectid = inode->i_ino;
- key.offset = (u64)-1;
- key.type = (u8)-1;
- while(1) {
- ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
- if (ret < 0) {
- err = ret;
- goto out;
- }
- BUG_ON(ret == 0);
- if (path->slots[0] == 0) {
- err = -ENOENT;
- goto out;
- }
- path->slots[0]--;
- leaf = path->nodes[0];
- btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
- found_type = btrfs_key_type(&found_key);
- if (found_key.objectid != inode->i_ino) {
- err = -ENOENT;
- goto out;
- }
- if ((found_type != BTRFS_DIR_ITEM_KEY &&
- found_type != BTRFS_DIR_INDEX_KEY) ||
- (!btrfs_match_dir_item_name(root, path, goodnames, 2) &&
- !btrfs_match_dir_item_name(root, path, goodnames, 1))) {
- err = -ENOTEMPTY;
- goto out;
- }
- ret = btrfs_del_item(trans, root, path);
- BUG_ON(ret);
-
- if (found_type == BTRFS_DIR_ITEM_KEY && found_key.offset == 1)
- break;
- btrfs_release_path(root, path);
- }
- ret = 0;
- btrfs_release_path(root, path);
/* now the directory is empty */
err = btrfs_unlink_trans(trans, root, dir, dentry);
if (!err) {
inode->i_size = 0;
}
-out:
- btrfs_release_path(root, path);
- btrfs_free_path(path);
+
nr = trans->blocks_used;
ret = btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(root, nr);
+
if (ret && !err)
err = ret;
return err;
u64 extent_start = 0;
u64 extent_num_bytes = 0;
u64 item_end = 0;
+ u64 root_gen = 0;
+ u64 root_owner = 0;
int found_extent;
int del_item;
int extent_type = -1;
found_extent = 1;
inode->i_blocks -= num_dec;
}
+ root_gen = btrfs_header_generation(leaf);
+ root_owner = btrfs_header_owner(leaf);
}
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE &&
!del_item) {
btrfs_release_path(root, path);
if (found_extent) {
ret = btrfs_free_extent(trans, root, extent_start,
- extent_num_bytes, 0);
+ extent_num_bytes,
+ root_owner,
+ root_gen, inode->i_ino,
+ found_key.offset, 0);
BUG_ON(ret);
}
}
struct btrfs_root *root = BTRFS_I(dir)->root;
int ret = 0;
+ if (namelen == 1 && strcmp(name, ".") == 0) {
+ location->objectid = dir->i_ino;
+ location->type = BTRFS_INODE_ITEM_KEY;
+ location->offset = 0;
+ return 0;
+ }
path = btrfs_alloc_path();
BUG_ON(!path);
+
+ if (namelen == 2 && strcmp(name, "..") == 0) {
+ struct btrfs_key key;
+ struct extent_buffer *leaf;
+ u32 nritems;
+ int slot;
+
+ key.objectid = dir->i_ino;
+ btrfs_set_key_type(&key, BTRFS_INODE_REF_KEY);
+ key.offset = 0;
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ BUG_ON(ret == 0);
+ ret = 0;
+
+ leaf = path->nodes[0];
+ slot = path->slots[0];
+ nritems = btrfs_header_nritems(leaf);
+ if (slot >= nritems)
+ goto out_err;
+
+ btrfs_item_key_to_cpu(leaf, &key, slot);
+ if (key.objectid != dir->i_ino ||
+ key.type != BTRFS_INODE_REF_KEY) {
+ goto out_err;
+ }
+ location->objectid = key.offset;
+ location->type = BTRFS_INODE_ITEM_KEY;
+ location->offset = 0;
+ goto out;
+ }
+
di = btrfs_lookup_dir_item(NULL, root, path, dir->i_ino, name,
namelen, 0);
if (IS_ERR(di))
ret = PTR_ERR(di);
if (!di || IS_ERR(di)) {
- location->objectid = 0;
- goto out;
+ goto out_err;
}
btrfs_dir_item_key_to_cpu(path->nodes[0], di, location);
out:
- btrfs_release_path(root, path);
btrfs_free_path(path);
return ret;
+out_err:
+ location->objectid = 0;
+ goto out;
}
/*
if (root->fs_info->tree_root == root)
key_type = BTRFS_DIR_ITEM_KEY;
+ /* special case for "." */
+ if (filp->f_pos == 0) {
+ over = filldir(dirent, ".", 1,
+ 1, inode->i_ino,
+ DT_DIR);
+ if (over)
+ return 0;
+ filp->f_pos = 1;
+ }
+
mutex_lock(&root->fs_info->fs_mutex);
key.objectid = inode->i_ino;
+ path = btrfs_alloc_path();
+ path->reada = 2;
+
+ /* special case for .., just use the back ref */
+ if (filp->f_pos == 1) {
+ btrfs_set_key_type(&key, BTRFS_INODE_REF_KEY);
+ key.offset = 0;
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ BUG_ON(ret == 0);
+ leaf = path->nodes[0];
+ slot = path->slots[0];
+ nritems = btrfs_header_nritems(leaf);
+ if (slot >= nritems) {
+ btrfs_release_path(root, path);
+ goto read_dir_items;
+ }
+ btrfs_item_key_to_cpu(leaf, &found_key, slot);
+ btrfs_release_path(root, path);
+ if (found_key.objectid != key.objectid ||
+ found_key.type != BTRFS_INODE_REF_KEY)
+ goto read_dir_items;
+ over = filldir(dirent, "..", 2,
+ 2, found_key.offset, DT_DIR);
+ if (over)
+ goto nopos;
+ filp->f_pos = 2;
+ }
+
+read_dir_items:
btrfs_set_key_type(&key, key_type);
key.offset = filp->f_pos;
- path = btrfs_alloc_path();
- path->reada = 2;
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto err;
dentry->d_parent->d_inode->i_ino,
&key, btrfs_inode_type(inode));
if (ret == 0) {
+ ret = btrfs_insert_inode_ref(trans, root,
+ dentry->d_name.name,
+ dentry->d_name.len,
+ inode->i_ino,
+ dentry->d_parent->d_inode->i_ino);
parent_inode = dentry->d_parent->d_inode;
parent_inode->i_size += dentry->d_name.len * 2;
parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;
return err;
}
-static int btrfs_make_empty_dir(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- u64 objectid, u64 dirid)
-{
- int ret;
- char buf[2];
- struct btrfs_key key;
-
- buf[0] = '.';
- buf[1] = '.';
-
- key.objectid = objectid;
- key.offset = 0;
- btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
-
- ret = btrfs_insert_dir_item(trans, root, buf, 1, objectid,
- &key, BTRFS_FT_DIR);
- if (ret)
- goto error;
-
- key.objectid = dirid;
- ret = btrfs_insert_dir_item(trans, root, buf, 2, objectid,
- &key, BTRFS_FT_DIR);
- if (ret)
- goto error;
-error:
- return ret;
-}
-
static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
struct inode *inode;
inode->i_fop = &btrfs_dir_file_operations;
btrfs_set_trans_block_group(trans, inode);
- err = btrfs_make_empty_dir(trans, root, inode->i_ino, dir->i_ino);
- if (err)
- goto out_fail;
-
- inode->i_size = 6;
+ inode->i_size = 0;
err = btrfs_update_inode(trans, root, inode);
if (err)
goto out_fail;
int btrfs_commit_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
- return extent_commit_write(&BTRFS_I(page->mapping->host)->extent_tree,
- page->mapping->host, page, from, to);
+ loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
+ struct inode *inode = page->mapping->host;
+
+ btrfs_cow_one_page(inode, page, PAGE_CACHE_SIZE);
+
+ set_page_extent_mapped(page);
+ set_page_dirty(page);
+
+ if (pos > inode->i_size) {
+ i_size_write(inode, pos);
+ mark_inode_dirty(inode);
+ }
+ return 0;
}
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, root->leafsize, 0, 0);
+ ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
+ 0, &objectid);
+ if (ret)
+ goto fail;
+
+ leaf = __btrfs_alloc_free_block(trans, root, root->leafsize,
+ objectid, trans->transid, 0, 0,
+ 0, 0);
if (IS_ERR(leaf))
return PTR_ERR(leaf);
btrfs_set_header_level(leaf, 0);
btrfs_set_header_bytenr(leaf, leaf->start);
btrfs_set_header_generation(leaf, trans->transid);
- btrfs_set_header_owner(leaf, root->root_key.objectid);
+ btrfs_set_header_owner(leaf, objectid);
+
write_extent_buffer(leaf, root->fs_info->fsid,
(unsigned long)btrfs_header_fsid(leaf),
BTRFS_FSID_SIZE);
free_extent_buffer(leaf);
leaf = NULL;
- ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
- 0, &objectid);
- if (ret)
- goto fail;
-
btrfs_set_root_dirid(&root_item, new_dirid);
key.objectid = objectid;
if (ret)
goto fail;
+ ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
+ name, namelen, objectid,
+ root->fs_info->sb->s_root->d_inode->i_ino);
+ if (ret)
+ goto fail;
+
ret = btrfs_commit_transaction(trans, root);
if (ret)
goto fail_commit;
inode->i_fop = &btrfs_dir_file_operations;
new_root->inode = inode;
- ret = btrfs_make_empty_dir(trans, new_root, new_dirid, new_dirid);
- if (ret)
- goto fail;
-
+ ret = btrfs_insert_inode_ref(trans, new_root, "..", 2, new_dirid,
+ new_dirid);
inode->i_nlink = 1;
- inode->i_size = 6;
+ inode->i_size = 0;
ret = btrfs_update_inode(trans, new_root, inode);
if (ret)
goto fail;
if (ret)
goto fail;
- ret = btrfs_inc_root_ref(trans, root);
+ ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
+ name, namelen, objectid,
+ root->fs_info->sb->s_root->d_inode->i_ino);
+
+ if (ret)
+ goto fail;
+
+ ret = btrfs_inc_root_ref(trans, root, objectid);
if (ret)
goto fail;
fail:
struct inode *old_inode = old_dentry->d_inode;
struct timespec ctime = CURRENT_TIME;
struct btrfs_path *path;
- struct btrfs_dir_item *di;
int ret;
if (S_ISDIR(old_inode->i_mode) && new_inode &&
new_dir->i_ctime = new_dir->i_mtime = ctime;
old_inode->i_ctime = ctime;
- if (S_ISDIR(old_inode->i_mode) && old_dir != new_dir) {
- struct btrfs_key *location = &BTRFS_I(new_dir)->location;
- struct btrfs_key old_parent_key;
- di = btrfs_lookup_dir_item(trans, root, path, old_inode->i_ino,
- "..", 2, -1);
- if (IS_ERR(di)) {
- ret = PTR_ERR(di);
- goto out_fail;
- }
- if (!di) {
- ret = -ENOENT;
- goto out_fail;
- }
- btrfs_dir_item_key_to_cpu(path->nodes[0], di, &old_parent_key);
- ret = btrfs_del_item(trans, root, path);
- if (ret) {
- goto out_fail;
- }
- btrfs_release_path(root, path);
-
- di = btrfs_lookup_dir_index_item(trans, root, path,
- old_inode->i_ino,
- old_parent_key.objectid,
- "..", 2, -1);
- if (IS_ERR(di)) {
- ret = PTR_ERR(di);
- goto out_fail;
- }
- if (!di) {
- ret = -ENOENT;
- goto out_fail;
- }
- ret = btrfs_del_item(trans, root, path);
- if (ret) {
- goto out_fail;
- }
- btrfs_release_path(root, path);
-
- ret = btrfs_insert_dir_item(trans, root, "..", 2,
- old_inode->i_ino, location,
- BTRFS_FT_DIR);
- if (ret)
- goto out_fail;
- }
-
-
ret = btrfs_unlink_trans(trans, root, old_dir, old_dentry);
if (ret)
goto out_fail;
projects / mv-sheeva.git / blobdiff