btrfs_create, btrfs_write_super, btrfs_sync_fs
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6204308..6080a81 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -10,6 +10,7 @@
#include <linux/backing-dev.h>
#include "ctree.h"
#include "disk-io.h"
+#include "transaction.h"
#define BTRFS_SUPER_MAGIC 0x9123682E
@@ -357,6 +358,131 @@
return 0;
}
+static void fill_inode_item(struct btrfs_inode_item *item,
+ struct inode *inode)
+{
+ btrfs_set_inode_uid(item, inode->i_uid);
+ btrfs_set_inode_gid(item, inode->i_gid);
+ btrfs_set_inode_size(item, inode->i_size);
+ btrfs_set_inode_mode(item, inode->i_mode);
+ btrfs_set_inode_nlink(item, inode->i_nlink);
+ btrfs_set_timespec_sec(&item->atime, inode->i_atime.tv_sec);
+ btrfs_set_timespec_nsec(&item->atime, inode->i_atime.tv_nsec);
+ btrfs_set_timespec_sec(&item->mtime, inode->i_mtime.tv_sec);
+ btrfs_set_timespec_nsec(&item->mtime, inode->i_mtime.tv_nsec);
+ btrfs_set_timespec_sec(&item->ctime, inode->i_ctime.tv_sec);
+ btrfs_set_timespec_nsec(&item->ctime, inode->i_ctime.tv_nsec);
+ btrfs_set_inode_nblocks(item, inode->i_blocks);
+ btrfs_set_inode_generation(item, inode->i_generation);
+}
+
+static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
+ struct inode *dir, int mode)
+{
+ struct inode *inode;
+ struct btrfs_inode_item inode_item;
+ struct btrfs_root *root = btrfs_sb(dir->i_sb);
+ struct btrfs_key key;
+ int ret;
+ u64 objectid;
+
+ inode = new_inode(dir->i_sb);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ ret = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
+ BUG_ON(ret);
+
+ inode->i_uid = current->fsuid;
+ inode->i_gid = current->fsgid;
+ inode->i_mode = mode;
+ inode->i_ino = objectid;
+ inode->i_blocks = 0;
+ inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
+ fill_inode_item(&inode_item, inode);
+
+
+ key.objectid = objectid;
+ key.flags = 0;
+ key.offset = 0;
+ btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
+ ret = btrfs_insert_inode_map(trans, root, objectid, &key);
+ BUG_ON(ret);
+
+ ret = btrfs_insert_inode(trans, root, objectid, &inode_item);
+ BUG_ON(ret);
+
+ insert_inode_hash(inode);
+ // FIXME mark_inode_dirty(inode)
+ return inode;
+}
+
+static int btrfs_add_link(struct btrfs_trans_handle *trans,
+ struct dentry *dentry, struct inode *inode)
+{
+ int ret;
+ ret = btrfs_insert_dir_item(trans, btrfs_sb(inode->i_sb),
+ dentry->d_name.name, dentry->d_name.len,
+ dentry->d_parent->d_inode->i_ino,
+ inode->i_ino, 0);
+ BUG_ON(ret);
+ return ret;
+}
+
+static int btrfs_add_nondir(struct btrfs_trans_handle *trans,
+ struct dentry *dentry, struct inode *inode)
+{
+ int err = btrfs_add_link(trans, dentry, inode);
+ if (!err) {
+ d_instantiate(dentry, inode);
+ return 0;
+ }
+ inode_dec_link_count(inode);
+ iput(inode);
+ return err;
+}
+
+static int btrfs_create(struct inode *dir, struct dentry *dentry,
+ int mode, struct nameidata *nd)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_root *root = btrfs_sb(dir->i_sb);
+ struct inode *inode;
+ int err;
+
+ trans = btrfs_start_transaction(root, 1);
+ inode = btrfs_new_inode(trans, dir, mode);
+ err = PTR_ERR(inode);
+ if (IS_ERR(inode))
+ return err;
+ // FIXME mark the inode dirty
+ err = btrfs_add_nondir(trans, dentry, inode);
+ dir->i_sb->s_dirt = 1;
+ btrfs_end_transaction(trans, root);
+ return err;
+}
+
+static void btrfs_write_super(struct super_block *sb)
+{
+ sb->s_dirt = 0;
+printk("btrfs write_super!\n");
+}
+
+static int btrfs_sync_fs(struct super_block *sb, int wait)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_root *root;
+ int ret;
+ sb->s_dirt = 0;
+ root = btrfs_sb(sb);
+ trans = btrfs_start_transaction(root, 1);
+ ret = btrfs_commit_transaction(trans, root);
+ sb->s_dirt = 0;
+ BUG_ON(ret);
+printk("btrfs sync_fs\n");
+ return 0;
+}
+
static int btrfs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
@@ -377,10 +503,13 @@
.drop_inode = generic_delete_inode,
.put_super = btrfs_put_super,
.read_inode = btrfs_read_locked_inode,
+ .write_super = btrfs_write_super,
+ .sync_fs = btrfs_sync_fs,
};
static struct inode_operations btrfs_dir_inode_operations = {
.lookup = btrfs_lookup,
+ .create = btrfs_create,
};
static struct file_operations btrfs_dir_file_operations = {