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Diffstat (limited to 'fs/btrfs/inode.c')
-rw-r--r--fs/btrfs/inode.c46
1 files changed, 30 insertions, 16 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 6d0cd9a7a615..6d6e1ac0a9a0 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -135,6 +135,7 @@ static int cow_file_range(struct inode *inode, u64 start, u64 end)
alloc_hint = ins.objectid + ins.offset;
start += cur_alloc_size;
}
+ btrfs_add_ordered_inode(inode);
out:
btrfs_end_transaction(trans, root);
return ret;
@@ -367,8 +368,8 @@ void btrfs_read_locked_inode(struct inode *inode)
path = btrfs_alloc_path();
BUG_ON(!path);
mutex_lock(&root->fs_info->fs_mutex);
-
memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));
+
ret = btrfs_lookup_inode(NULL, root, path, &location, 0);
if (ret)
goto make_bad;
@@ -898,7 +899,6 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
if ((offset & (blocksize - 1)) == 0)
goto out;
- down_read(&root->snap_sem);
ret = -ENOMEM;
page = grab_cache_page(mapping, index);
if (!page)
@@ -917,7 +917,6 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
unlock_page(page);
page_cache_release(page);
- up_read(&BTRFS_I(inode)->root->snap_sem);
out:
return ret;
}
@@ -1146,6 +1145,19 @@ static int btrfs_find_actor(struct inode *inode, void *opaque)
args->root == BTRFS_I(inode)->root);
}
+struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
+ u64 root_objectid)
+{
+ struct btrfs_iget_args args;
+ args.ino = objectid;
+ args.root = btrfs_lookup_fs_root(btrfs_sb(s)->fs_info, root_objectid);
+
+ if (!args.root)
+ return NULL;
+
+ return ilookup5(s, objectid, btrfs_find_actor, (void *)&args);
+}
+
struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
struct btrfs_root *root)
{
@@ -1336,7 +1348,6 @@ read_dir_items:
d_type = btrfs_filetype_table[btrfs_dir_type(leaf, di)];
btrfs_dir_item_key_to_cpu(leaf, di, &location);
-
over = filldir(dirent, name_ptr, name_len,
found_key.offset,
location.objectid,
@@ -2054,7 +2065,6 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page)
ret = -EINVAL;
- down_read(&BTRFS_I(inode)->root->snap_sem);
lock_page(page);
wait_on_page_writeback(page);
size = i_size_read(inode);
@@ -2075,7 +2085,6 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page)
ret = btrfs_cow_one_page(inode, page, end);
out_unlock:
- up_read(&BTRFS_I(inode)->root->snap_sem);
unlock_page(page);
out:
return ret;
@@ -2118,7 +2127,7 @@ static int noinline create_subvol(struct btrfs_root *root, char *name,
struct btrfs_root_item root_item;
struct btrfs_inode_item *inode_item;
struct extent_buffer *leaf;
- struct btrfs_root *new_root;
+ struct btrfs_root *new_root = root;
struct inode *inode;
struct inode *dir;
int ret;
@@ -2230,7 +2239,7 @@ static int noinline create_subvol(struct btrfs_root *root, char *name,
goto fail;
fail:
nr = trans->blocks_used;
- err = btrfs_commit_transaction(trans, root);
+ err = btrfs_commit_transaction(trans, new_root);
if (err && !ret)
ret = err;
fail_commit:
@@ -2253,10 +2262,6 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
if (!root->ref_cows)
return -EINVAL;
- down_write(&root->snap_sem);
- freeze_bdev(root->fs_info->sb->s_bdev);
- thaw_bdev(root->fs_info->sb->s_bdev, root->fs_info->sb);
-
mutex_lock(&root->fs_info->fs_mutex);
ret = btrfs_check_free_space(root, 1, 0);
if (ret)
@@ -2264,6 +2269,9 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
trans = btrfs_start_transaction(root, 1);
BUG_ON(!trans);
+ err = btrfs_commit_transaction(trans, root);
+
+ trans = btrfs_start_transaction(root, 1);
ret = btrfs_update_inode(trans, root, root->inode);
if (ret)
@@ -2272,9 +2280,7 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
0, &objectid);
if (ret)
- goto fail;
-
- memcpy(&new_root_item, &root->root_item,
+ goto fail; memcpy(&new_root_item, &root->root_item,
sizeof(new_root_item));
key.objectid = objectid;
@@ -2285,12 +2291,20 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);
free_extent_buffer(tmp);
+ /* write the ordered inodes to force all delayed allocations to
+ * be filled. Once this is done, we can copy the root
+ */
+ mutex_lock(&root->fs_info->trans_mutex);
+ btrfs_write_ordered_inodes(trans, root);
+ mutex_unlock(&root->fs_info->trans_mutex);
+
btrfs_copy_root(trans, root, root->node, &tmp, objectid);
btrfs_set_root_bytenr(&new_root_item, tmp->start);
btrfs_set_root_level(&new_root_item, btrfs_header_level(tmp));
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&new_root_item);
+printk("new root %Lu node %Lu\n", objectid, tmp->start);
free_extent_buffer(tmp);
if (ret)
goto fail;
@@ -2321,7 +2335,6 @@ fail:
ret = err;
fail_unlock:
mutex_unlock(&root->fs_info->fs_mutex);
- up_write(&root->snap_sem);
btrfs_btree_balance_dirty(root, nr);
return ret;
}
@@ -2608,6 +2621,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
if (!ei)
return NULL;
ei->last_trans = 0;
+ ei->ordered_trans = 0;
return &ei->vfs_inode;
}