2007-03-21 16:12:56 +01:00
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#include <linux/module.h>
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2007-03-22 17:13:20 +01:00
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#include <linux/buffer_head.h>
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2007-03-21 16:12:56 +01:00
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/highmem.h>
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#include <linux/time.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/smp_lock.h>
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#include <linux/backing-dev.h>
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#include "ctree.h"
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2007-03-22 17:13:20 +01:00
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#include "disk-io.h"
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2007-03-23 15:01:08 +01:00
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#include "transaction.h"
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2007-03-21 16:12:56 +01:00
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#define BTRFS_SUPER_MAGIC 0x9123682E
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2007-03-22 17:13:20 +01:00
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static struct inode_operations btrfs_dir_inode_operations;
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static struct super_operations btrfs_super_ops;
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static struct file_operations btrfs_dir_file_operations;
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static void btrfs_read_locked_inode(struct inode *inode)
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2007-03-21 16:12:56 +01:00
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{
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2007-03-22 17:13:20 +01:00
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struct btrfs_path path;
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struct btrfs_inode_item *inode_item;
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struct btrfs_root *root = btrfs_sb(inode->i_sb);
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int ret;
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btrfs_init_path(&path);
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ret = btrfs_lookup_inode(NULL, root, &path, inode->i_ino, 0);
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if (ret) {
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make_bad_inode(inode);
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2007-03-25 17:35:08 +02:00
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btrfs_release_path(root, &path);
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2007-03-22 17:13:20 +01:00
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return;
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}
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inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]),
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path.slots[0],
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struct btrfs_inode_item);
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2007-03-21 16:12:56 +01:00
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2007-03-22 17:13:20 +01:00
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inode->i_mode = btrfs_inode_mode(inode_item);
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inode->i_nlink = btrfs_inode_nlink(inode_item);
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inode->i_uid = btrfs_inode_uid(inode_item);
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inode->i_gid = btrfs_inode_gid(inode_item);
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inode->i_size = btrfs_inode_size(inode_item);
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inode->i_atime.tv_sec = btrfs_timespec_sec(&inode_item->atime);
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inode->i_atime.tv_nsec = btrfs_timespec_nsec(&inode_item->atime);
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inode->i_mtime.tv_sec = btrfs_timespec_sec(&inode_item->mtime);
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inode->i_mtime.tv_nsec = btrfs_timespec_nsec(&inode_item->mtime);
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inode->i_ctime.tv_sec = btrfs_timespec_sec(&inode_item->ctime);
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inode->i_ctime.tv_nsec = btrfs_timespec_nsec(&inode_item->ctime);
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inode->i_blocks = btrfs_inode_nblocks(inode_item);
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inode->i_generation = btrfs_inode_generation(inode_item);
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btrfs_release_path(root, &path);
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switch (inode->i_mode & S_IFMT) {
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#if 0
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default:
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init_special_inode(inode, inode->i_mode,
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btrfs_inode_rdev(inode_item));
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break;
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#endif
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case S_IFREG:
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break;
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case S_IFDIR:
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inode->i_op = &btrfs_dir_inode_operations;
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inode->i_fop = &btrfs_dir_file_operations;
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break;
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case S_IFLNK:
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// inode->i_op = &page_symlink_inode_operations;
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break;
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2007-03-21 16:12:56 +01:00
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}
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2007-03-22 17:13:20 +01:00
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return;
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2007-03-21 16:12:56 +01:00
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}
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2007-03-25 19:44:56 +02:00
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static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
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{
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struct btrfs_path path;
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struct btrfs_root *root;
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struct btrfs_trans_handle *trans;
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const char *name = dentry->d_name.name;
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int name_len = dentry->d_name.len;
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int ret;
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u64 objectid;
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struct btrfs_dir_item *di;
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btrfs_init_path(&path);
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root = btrfs_sb(dir->i_sb);
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mutex_lock(&root->fs_info->fs_mutex);
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trans = btrfs_start_transaction(root, 1);
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ret = btrfs_lookup_dir_item(trans, root, &path, dir->i_ino,
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name, name_len, -1);
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if (ret < 0)
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goto err;
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if (ret > 0) {
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ret = -ENOENT;
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goto err;
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}
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di = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0],
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struct btrfs_dir_item);
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objectid = btrfs_dir_objectid(di);
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ret = btrfs_del_item(trans, root, &path);
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BUG_ON(ret);
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dentry->d_inode->i_ctime = dir->i_ctime;
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err:
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btrfs_release_path(root, &path);
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btrfs_end_transaction(trans, root);
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mutex_unlock(&root->fs_info->fs_mutex);
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if (ret == 0)
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inode_dec_link_count(dentry->d_inode);
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return ret;
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}
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static int btrfs_free_inode(struct btrfs_trans_handle *trans,
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struct btrfs_root *root,
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struct inode *inode)
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{
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u64 objectid = inode->i_ino;
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struct btrfs_path path;
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struct btrfs_inode_map_item *map;
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struct btrfs_key stat_data_key;
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int ret;
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clear_inode(inode);
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btrfs_init_path(&path);
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ret = btrfs_lookup_inode_map(trans, root, &path, objectid, -1);
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if (ret) {
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if (ret > 0)
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ret = -ENOENT;
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btrfs_release_path(root, &path);
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goto error;
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}
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map = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0],
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struct btrfs_inode_map_item);
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btrfs_disk_key_to_cpu(&stat_data_key, &map->key);
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ret = btrfs_del_item(trans, root->fs_info->inode_root, &path);
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BUG_ON(ret);
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btrfs_release_path(root, &path);
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btrfs_init_path(&path);
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ret = btrfs_lookup_inode(trans, root, &path, objectid, -1);
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BUG_ON(ret);
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ret = btrfs_del_item(trans, root, &path);
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BUG_ON(ret);
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btrfs_release_path(root, &path);
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error:
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return ret;
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}
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static void btrfs_delete_inode(struct inode *inode)
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{
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struct btrfs_trans_handle *trans;
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struct btrfs_root *root = btrfs_sb(inode->i_sb);
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truncate_inode_pages(&inode->i_data, 0);
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if (is_bad_inode(inode)) {
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goto no_delete;
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}
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inode->i_size = 0;
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if (inode->i_blocks)
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WARN_ON(1);
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mutex_lock(&root->fs_info->fs_mutex);
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trans = btrfs_start_transaction(root, 1);
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btrfs_free_inode(trans, root, inode);
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btrfs_end_transaction(trans, root);
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mutex_unlock(&root->fs_info->fs_mutex);
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return;
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no_delete:
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clear_inode(inode);
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}
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2007-03-22 17:13:20 +01:00
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static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
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ino_t *ino)
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{
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const char *name = dentry->d_name.name;
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int namelen = dentry->d_name.len;
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struct btrfs_dir_item *di;
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struct btrfs_path path;
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struct btrfs_root *root = btrfs_sb(dir->i_sb);
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int ret;
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btrfs_init_path(&path);
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ret = btrfs_lookup_dir_item(NULL, root, &path, dir->i_ino, name,
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namelen, 0);
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2007-03-23 20:56:19 +01:00
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if (ret || !btrfs_match_dir_item_name(root, &path, name, namelen)) {
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2007-03-22 17:13:20 +01:00
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*ino = 0;
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goto out;
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}
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di = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0],
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struct btrfs_dir_item);
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*ino = btrfs_dir_objectid(di);
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out:
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btrfs_release_path(root, &path);
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return ret;
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}
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static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
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struct nameidata *nd)
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{
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struct inode * inode;
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ino_t ino;
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int ret;
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if (dentry->d_name.len > BTRFS_NAME_LEN)
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return ERR_PTR(-ENAMETOOLONG);
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ret = btrfs_inode_by_name(dir, dentry, &ino);
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if (ret < 0)
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return ERR_PTR(ret);
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inode = NULL;
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if (ino) {
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inode = iget(dir->i_sb, ino);
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if (!inode)
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return ERR_PTR(-EACCES);
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}
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return d_splice_alias(inode, dentry);
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}
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2007-03-25 20:03:08 +02:00
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static void reada_leaves(struct btrfs_root *root, struct btrfs_path *path)
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{
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struct buffer_head *bh;
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struct btrfs_node *node;
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int i;
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int nritems;
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u64 objectid;
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u64 item_objectid;
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u64 blocknr;
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int slot;
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if (!path->nodes[1])
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return;
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node = btrfs_buffer_node(path->nodes[1]);
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slot = path->slots[1];
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objectid = btrfs_disk_key_objectid(&node->ptrs[slot].key);
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nritems = btrfs_header_nritems(&node->header);
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for (i = slot; i < nritems; i++) {
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item_objectid = btrfs_disk_key_objectid(&node->ptrs[i].key);
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if (item_objectid != objectid)
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break;
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blocknr = btrfs_node_blockptr(node, i);
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bh = sb_getblk(root->fs_info->sb, blocknr);
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ll_rw_block(READ, 1, &bh);
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brelse(bh);
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}
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}
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2007-03-22 17:13:20 +01:00
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static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
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{
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struct inode *inode = filp->f_path.dentry->d_inode;
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struct btrfs_root *root = btrfs_sb(inode->i_sb);
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struct btrfs_item *item;
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struct btrfs_dir_item *di;
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struct btrfs_key key;
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struct btrfs_path path;
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int ret;
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u32 nritems;
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struct btrfs_leaf *leaf;
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int slot;
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int advance;
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unsigned char d_type = DT_UNKNOWN;
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2007-03-23 20:56:19 +01:00
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int over = 0;
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2007-03-22 17:13:20 +01:00
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key.objectid = inode->i_ino;
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key.flags = 0;
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btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
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key.offset = filp->f_pos;
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btrfs_init_path(&path);
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ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
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if (ret < 0) {
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goto err;
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}
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2007-03-23 20:56:19 +01:00
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advance = 0;
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2007-03-25 20:03:08 +02:00
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reada_leaves(root, &path);
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2007-03-22 17:13:20 +01:00
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while(1) {
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leaf = btrfs_buffer_leaf(path.nodes[0]);
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nritems = btrfs_header_nritems(&leaf->header);
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slot = path.slots[0];
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if (advance) {
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if (slot == nritems -1) {
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ret = btrfs_next_leaf(root, &path);
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if (ret)
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break;
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leaf = btrfs_buffer_leaf(path.nodes[0]);
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nritems = btrfs_header_nritems(&leaf->header);
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slot = path.slots[0];
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2007-03-25 20:03:08 +02:00
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if (path.nodes[1] && path.slots[1] == 0)
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reada_leaves(root, &path);
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2007-03-22 17:13:20 +01:00
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} else {
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slot++;
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path.slots[0]++;
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}
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}
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advance = 1;
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item = leaf->items + slot;
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if (btrfs_disk_key_objectid(&item->key) != key.objectid)
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break;
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if (btrfs_disk_key_type(&item->key) != BTRFS_DIR_ITEM_KEY)
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continue;
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2007-03-23 20:56:19 +01:00
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if (btrfs_disk_key_offset(&item->key) < filp->f_pos)
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continue;
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2007-03-22 17:13:20 +01:00
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di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item);
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over = filldir(dirent, (const char *)(di + 1),
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btrfs_dir_name_len(di),
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btrfs_disk_key_offset(&item->key),
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btrfs_dir_objectid(di), d_type);
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2007-03-23 20:56:19 +01:00
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if (over) {
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filp->f_pos = btrfs_disk_key_offset(&item->key);
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2007-03-22 17:13:20 +01:00
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break;
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2007-03-23 20:56:19 +01:00
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}
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2007-03-22 17:13:20 +01:00
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filp->f_pos = btrfs_disk_key_offset(&item->key) + 1;
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}
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ret = 0;
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err:
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btrfs_release_path(root, &path);
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return ret;
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}
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static void btrfs_put_super (struct super_block * sb)
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{
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struct btrfs_root *root = btrfs_sb(sb);
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int ret;
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ret = close_ctree(root);
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if (ret) {
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printk("close ctree returns %d\n", ret);
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}
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sb->s_fs_info = NULL;
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|
|
|
}
|
2007-03-21 16:12:56 +01:00
|
|
|
|
|
|
|
static int btrfs_fill_super(struct super_block * sb, void * data, int silent)
|
|
|
|
{
|
|
|
|
struct inode * inode;
|
2007-03-22 17:13:20 +01:00
|
|
|
struct dentry * root_dentry;
|
|
|
|
struct btrfs_super_block *disk_super;
|
|
|
|
struct buffer_head *bh;
|
|
|
|
struct btrfs_root *root;
|
2007-03-21 16:12:56 +01:00
|
|
|
|
|
|
|
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
|
|
|
sb->s_blocksize = PAGE_CACHE_SIZE;
|
|
|
|
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
|
|
|
|
sb->s_magic = BTRFS_SUPER_MAGIC;
|
2007-03-22 17:13:20 +01:00
|
|
|
sb->s_op = &btrfs_super_ops;
|
2007-03-21 16:12:56 +01:00
|
|
|
sb->s_time_gran = 1;
|
2007-03-22 17:13:20 +01:00
|
|
|
|
|
|
|
bh = sb_bread(sb, BTRFS_SUPER_INFO_OFFSET / sb->s_blocksize);
|
|
|
|
if (!bh) {
|
|
|
|
printk("btrfs: unable to read on disk super\n");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
disk_super = (struct btrfs_super_block *)bh->b_data;
|
|
|
|
root = open_ctree(sb, bh, disk_super);
|
|
|
|
sb->s_fs_info = root;
|
|
|
|
if (!root) {
|
|
|
|
printk("btrfs: open_ctree failed\n");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
printk("read in super total blocks %Lu root %Lu\n",
|
|
|
|
btrfs_super_total_blocks(disk_super),
|
|
|
|
btrfs_super_root_dir(disk_super));
|
|
|
|
|
|
|
|
inode = iget_locked(sb, btrfs_super_root_dir(disk_super));
|
2007-03-21 16:12:56 +01:00
|
|
|
if (!inode)
|
|
|
|
return -ENOMEM;
|
2007-03-22 17:13:20 +01:00
|
|
|
if (inode->i_state & I_NEW) {
|
|
|
|
btrfs_read_locked_inode(inode);
|
|
|
|
unlock_new_inode(inode);
|
|
|
|
}
|
2007-03-21 16:12:56 +01:00
|
|
|
|
2007-03-22 17:13:20 +01:00
|
|
|
root_dentry = d_alloc_root(inode);
|
|
|
|
if (!root_dentry) {
|
2007-03-21 16:12:56 +01:00
|
|
|
iput(inode);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
2007-03-22 17:13:20 +01:00
|
|
|
sb->s_root = root_dentry;
|
|
|
|
|
2007-03-21 16:12:56 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-03-23 15:01:08 +01:00
|
|
|
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;
|
2007-03-26 02:17:36 +02:00
|
|
|
/* FIXME do this on link */
|
|
|
|
if (mode & S_IFDIR)
|
|
|
|
inode->i_size = 3;
|
2007-03-23 15:01:08 +01:00
|
|
|
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);
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
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;
|
2007-03-25 19:44:56 +02:00
|
|
|
int drop_inode = 0;
|
2007-03-23 15:01:08 +01:00
|
|
|
|
2007-03-24 00:47:49 +01:00
|
|
|
mutex_lock(&root->fs_info->fs_mutex);
|
2007-03-23 15:01:08 +01:00
|
|
|
trans = btrfs_start_transaction(root, 1);
|
|
|
|
inode = btrfs_new_inode(trans, dir, mode);
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
if (IS_ERR(inode))
|
2007-03-24 00:47:49 +01:00
|
|
|
goto out_unlock;
|
2007-03-23 15:01:08 +01:00
|
|
|
// FIXME mark the inode dirty
|
|
|
|
err = btrfs_add_nondir(trans, dentry, inode);
|
2007-03-25 19:44:56 +02:00
|
|
|
if (err)
|
|
|
|
drop_inode = 1;
|
2007-03-23 15:01:08 +01:00
|
|
|
dir->i_sb->s_dirt = 1;
|
|
|
|
btrfs_end_transaction(trans, root);
|
2007-03-24 00:47:49 +01:00
|
|
|
out_unlock:
|
|
|
|
mutex_unlock(&root->fs_info->fs_mutex);
|
2007-03-25 19:44:56 +02:00
|
|
|
if (drop_inode) {
|
|
|
|
inode_dec_link_count(inode);
|
|
|
|
iput(inode);
|
|
|
|
}
|
2007-03-23 15:01:08 +01:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2007-03-26 02:17:36 +02:00
|
|
|
static int btrfs_make_empty_dir(struct btrfs_trans_handle *trans,
|
|
|
|
struct inode *inode, struct inode *dir)
|
|
|
|
{
|
|
|
|
struct btrfs_root *root = btrfs_sb(inode->i_sb);
|
|
|
|
int ret;
|
|
|
|
char buf[2];
|
|
|
|
buf[0] = '.';
|
|
|
|
buf[1] = '.';
|
|
|
|
|
|
|
|
ret = btrfs_insert_dir_item(trans, root, buf, 1, inode->i_ino,
|
|
|
|
inode->i_ino, 1);
|
|
|
|
if (ret)
|
|
|
|
goto error;
|
|
|
|
ret = btrfs_insert_dir_item(trans, root, buf, 2, inode->i_ino,
|
|
|
|
dir->i_ino, 1);
|
|
|
|
error:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
|
|
|
|
{
|
|
|
|
struct inode *inode;
|
|
|
|
struct btrfs_trans_handle *trans;
|
|
|
|
struct btrfs_root *root = btrfs_sb(dir->i_sb);
|
|
|
|
int err = 0;
|
|
|
|
int drop_on_err = 0;
|
|
|
|
|
|
|
|
mutex_lock(&root->fs_info->fs_mutex);
|
|
|
|
trans = btrfs_start_transaction(root, 1);
|
|
|
|
if (IS_ERR(trans)) {
|
|
|
|
err = PTR_ERR(trans);
|
|
|
|
goto out_unlock;
|
|
|
|
}
|
|
|
|
inode = btrfs_new_inode(trans, dir, S_IFDIR | mode);
|
|
|
|
if (IS_ERR(inode)) {
|
|
|
|
err = PTR_ERR(inode);
|
|
|
|
goto out_fail;
|
|
|
|
}
|
|
|
|
drop_on_err = 1;
|
|
|
|
inode->i_op = &btrfs_dir_inode_operations;
|
|
|
|
inode->i_fop = &btrfs_dir_file_operations;
|
|
|
|
|
|
|
|
err = btrfs_make_empty_dir(trans, inode, dir);
|
|
|
|
if (err)
|
|
|
|
goto out_fail;
|
|
|
|
err = btrfs_add_link(trans, dentry, inode);
|
|
|
|
if (err)
|
|
|
|
goto out_fail;
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
mark_inode_dirty(inode);
|
|
|
|
drop_on_err = 0;
|
|
|
|
|
|
|
|
out_fail:
|
|
|
|
btrfs_end_transaction(trans, root);
|
|
|
|
out_unlock:
|
|
|
|
mutex_unlock(&root->fs_info->fs_mutex);
|
|
|
|
if (drop_on_err)
|
|
|
|
iput(inode);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2007-03-23 15:01:08 +01:00
|
|
|
static int btrfs_sync_fs(struct super_block *sb, int wait)
|
|
|
|
{
|
|
|
|
struct btrfs_trans_handle *trans;
|
|
|
|
struct btrfs_root *root;
|
|
|
|
int ret;
|
2007-03-23 16:00:45 +01:00
|
|
|
|
2007-03-23 15:01:08 +01:00
|
|
|
sb->s_dirt = 0;
|
2007-03-24 00:47:49 +01:00
|
|
|
if (!wait) {
|
|
|
|
filemap_flush(sb->s_bdev->bd_inode->i_mapping);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
filemap_write_and_wait(sb->s_bdev->bd_inode->i_mapping);
|
2007-03-23 16:00:45 +01:00
|
|
|
|
2007-03-23 15:01:08 +01:00
|
|
|
root = btrfs_sb(sb);
|
2007-03-24 00:47:49 +01:00
|
|
|
mutex_lock(&root->fs_info->fs_mutex);
|
2007-03-23 15:01:08 +01:00
|
|
|
trans = btrfs_start_transaction(root, 1);
|
|
|
|
ret = btrfs_commit_transaction(trans, root);
|
|
|
|
sb->s_dirt = 0;
|
|
|
|
BUG_ON(ret);
|
|
|
|
printk("btrfs sync_fs\n");
|
2007-03-24 00:47:49 +01:00
|
|
|
mutex_unlock(&root->fs_info->fs_mutex);
|
2007-03-23 15:01:08 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-03-24 00:47:49 +01:00
|
|
|
static void btrfs_write_super(struct super_block *sb)
|
|
|
|
{
|
|
|
|
btrfs_sync_fs(sb, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2007-03-21 16:12:56 +01:00
|
|
|
static int btrfs_get_sb(struct file_system_type *fs_type,
|
|
|
|
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
|
|
|
|
{
|
|
|
|
return get_sb_bdev(fs_type, flags, dev_name, data,
|
|
|
|
btrfs_fill_super, mnt);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct file_system_type btrfs_fs_type = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.name = "btrfs",
|
|
|
|
.get_sb = btrfs_get_sb,
|
|
|
|
.kill_sb = kill_block_super,
|
|
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
|
|
};
|
|
|
|
|
2007-03-22 17:13:20 +01:00
|
|
|
static struct super_operations btrfs_super_ops = {
|
|
|
|
.statfs = simple_statfs,
|
2007-03-25 19:44:56 +02:00
|
|
|
.delete_inode = btrfs_delete_inode,
|
2007-03-22 17:13:20 +01:00
|
|
|
.put_super = btrfs_put_super,
|
|
|
|
.read_inode = btrfs_read_locked_inode,
|
2007-03-23 15:01:08 +01:00
|
|
|
.write_super = btrfs_write_super,
|
|
|
|
.sync_fs = btrfs_sync_fs,
|
2007-03-22 17:13:20 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
static struct inode_operations btrfs_dir_inode_operations = {
|
|
|
|
.lookup = btrfs_lookup,
|
2007-03-23 15:01:08 +01:00
|
|
|
.create = btrfs_create,
|
2007-03-25 19:44:56 +02:00
|
|
|
.unlink = btrfs_unlink,
|
2007-03-26 02:17:36 +02:00
|
|
|
.mkdir = btrfs_mkdir,
|
2007-03-22 17:13:20 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
static struct file_operations btrfs_dir_file_operations = {
|
|
|
|
.llseek = generic_file_llseek,
|
|
|
|
.read = generic_read_dir,
|
|
|
|
.readdir = btrfs_readdir,
|
|
|
|
};
|
|
|
|
|
|
|
|
|
2007-03-21 16:12:56 +01:00
|
|
|
static int __init init_btrfs_fs(void)
|
|
|
|
{
|
|
|
|
printk("btrfs loaded!\n");
|
|
|
|
return register_filesystem(&btrfs_fs_type);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit exit_btrfs_fs(void)
|
|
|
|
{
|
|
|
|
unregister_filesystem(&btrfs_fs_type);
|
|
|
|
printk("btrfs unloaded\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(init_btrfs_fs)
|
|
|
|
module_exit(exit_btrfs_fs)
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|