+/*
+ * Copyright (C) 2007 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
#include <linux/module.h>
#include <linux/buffer_head.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/smp_lock.h>
#include <linux/backing-dev.h>
+#include <linux/mpage.h>
+#include <linux/swap.h>
+#include <linux/writeback.h>
+#include <linux/statfs.h>
+#include <linux/compat.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
+#include "btrfs_inode.h"
+#include "ioctl.h"
+#include "print-tree.h"
#define BTRFS_SUPER_MAGIC 0x9123682E
-static struct inode_operations btrfs_dir_inode_operations;
static struct super_operations btrfs_super_ops;
-static struct file_operations btrfs_dir_file_operations;
-
-static void btrfs_read_locked_inode(struct inode *inode)
-{
- struct btrfs_path path;
- struct btrfs_inode_item *inode_item;
- struct btrfs_root *root = btrfs_sb(inode->i_sb);
- int ret;
- btrfs_init_path(&path);
- ret = btrfs_lookup_inode(NULL, root, &path, inode->i_ino, 0);
- if (ret) {
- make_bad_inode(inode);
- btrfs_release_path(root, &path);
- return;
- }
- inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]),
- path.slots[0],
- struct btrfs_inode_item);
-
- inode->i_mode = btrfs_inode_mode(inode_item);
- inode->i_nlink = btrfs_inode_nlink(inode_item);
- inode->i_uid = btrfs_inode_uid(inode_item);
- inode->i_gid = btrfs_inode_gid(inode_item);
- inode->i_size = btrfs_inode_size(inode_item);
- inode->i_atime.tv_sec = btrfs_timespec_sec(&inode_item->atime);
- inode->i_atime.tv_nsec = btrfs_timespec_nsec(&inode_item->atime);
- inode->i_mtime.tv_sec = btrfs_timespec_sec(&inode_item->mtime);
- inode->i_mtime.tv_nsec = btrfs_timespec_nsec(&inode_item->mtime);
- inode->i_ctime.tv_sec = btrfs_timespec_sec(&inode_item->ctime);
- inode->i_ctime.tv_nsec = btrfs_timespec_nsec(&inode_item->ctime);
- inode->i_blocks = btrfs_inode_nblocks(inode_item);
- inode->i_generation = btrfs_inode_generation(inode_item);
- btrfs_release_path(root, &path);
- switch (inode->i_mode & S_IFMT) {
-#if 0
- default:
- init_special_inode(inode, inode->i_mode,
- btrfs_inode_rdev(inode_item));
- break;
-#endif
- case S_IFREG:
- break;
- case S_IFDIR:
- inode->i_op = &btrfs_dir_inode_operations;
- inode->i_fop = &btrfs_dir_file_operations;
- break;
- case S_IFLNK:
- // inode->i_op = &page_symlink_inode_operations;
- break;
- }
- return;
-}
-
-static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
-{
- struct btrfs_path path;
- struct btrfs_root *root;
- struct btrfs_trans_handle *trans;
- const char *name = dentry->d_name.name;
- int name_len = dentry->d_name.len;
- int ret;
- u64 objectid;
- struct btrfs_dir_item *di;
-
- btrfs_init_path(&path);
- root = btrfs_sb(dir->i_sb);
- mutex_lock(&root->fs_info->fs_mutex);
- trans = btrfs_start_transaction(root, 1);
-
- ret = btrfs_lookup_dir_item(trans, root, &path, dir->i_ino,
- name, name_len, -1);
- if (ret < 0)
- goto err;
- if (ret > 0) {
- ret = -ENOENT;
- goto err;
- }
- di = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0],
- struct btrfs_dir_item);
- objectid = btrfs_dir_objectid(di);
-
- ret = btrfs_del_item(trans, root, &path);
- BUG_ON(ret);
- dentry->d_inode->i_ctime = dir->i_ctime;
-err:
- btrfs_release_path(root, &path);
- btrfs_end_transaction(trans, root);
- mutex_unlock(&root->fs_info->fs_mutex);
- if (ret == 0)
- inode_dec_link_count(dentry->d_inode);
- return ret;
-}
-
-static int btrfs_free_inode(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- struct inode *inode)
-{
- u64 objectid = inode->i_ino;
- struct btrfs_path path;
- struct btrfs_inode_map_item *map;
- struct btrfs_key stat_data_key;
- int ret;
- clear_inode(inode);
- btrfs_init_path(&path);
- ret = btrfs_lookup_inode_map(trans, root, &path, objectid, -1);
- if (ret) {
- if (ret > 0)
- ret = -ENOENT;
- btrfs_release_path(root, &path);
- goto error;
- }
- map = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0],
- struct btrfs_inode_map_item);
- btrfs_disk_key_to_cpu(&stat_data_key, &map->key);
- ret = btrfs_del_item(trans, root->fs_info->inode_root, &path);
- BUG_ON(ret);
- btrfs_release_path(root, &path);
- btrfs_init_path(&path);
-
- ret = btrfs_lookup_inode(trans, root, &path, objectid, -1);
- BUG_ON(ret);
- ret = btrfs_del_item(trans, root, &path);
- BUG_ON(ret);
- btrfs_release_path(root, &path);
-error:
- return ret;
-}
-
-static void btrfs_delete_inode(struct inode *inode)
-{
- struct btrfs_trans_handle *trans;
- struct btrfs_root *root = btrfs_sb(inode->i_sb);
- truncate_inode_pages(&inode->i_data, 0);
- if (is_bad_inode(inode)) {
- goto no_delete;
- }
- inode->i_size = 0;
- if (inode->i_blocks)
- WARN_ON(1);
-
- mutex_lock(&root->fs_info->fs_mutex);
- trans = btrfs_start_transaction(root, 1);
- btrfs_free_inode(trans, root, inode);
- btrfs_end_transaction(trans, root);
- mutex_unlock(&root->fs_info->fs_mutex);
- return;
-no_delete:
- clear_inode(inode);
-}
-
-
-static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
- ino_t *ino)
-{
- const char *name = dentry->d_name.name;
- int namelen = dentry->d_name.len;
- struct btrfs_dir_item *di;
- struct btrfs_path path;
- struct btrfs_root *root = btrfs_sb(dir->i_sb);
- int ret;
-
- btrfs_init_path(&path);
- ret = btrfs_lookup_dir_item(NULL, root, &path, dir->i_ino, name,
- namelen, 0);
- if (ret || !btrfs_match_dir_item_name(root, &path, name, namelen)) {
- *ino = 0;
- goto out;
- }
- di = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0],
- struct btrfs_dir_item);
- *ino = btrfs_dir_objectid(di);
-out:
- btrfs_release_path(root, &path);
- return ret;
-}
-
-static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
-{
- struct inode * inode;
- ino_t ino;
- int ret;
-
- if (dentry->d_name.len > BTRFS_NAME_LEN)
- return ERR_PTR(-ENAMETOOLONG);
-
- ret = btrfs_inode_by_name(dir, dentry, &ino);
- if (ret < 0)
- return ERR_PTR(ret);
- inode = NULL;
- if (ino) {
- inode = iget(dir->i_sb, ino);
- if (!inode)
- return ERR_PTR(-EACCES);
- }
- return d_splice_alias(inode, dentry);
-}
-
-static void reada_leaves(struct btrfs_root *root, struct btrfs_path *path)
-{
- struct buffer_head *bh;
- struct btrfs_node *node;
- int i;
- int nritems;
- u64 objectid;
- u64 item_objectid;
- u64 blocknr;
- int slot;
-
- if (!path->nodes[1])
- return;
- node = btrfs_buffer_node(path->nodes[1]);
- slot = path->slots[1];
- objectid = btrfs_disk_key_objectid(&node->ptrs[slot].key);
- nritems = btrfs_header_nritems(&node->header);
- for (i = slot; i < nritems; i++) {
- item_objectid = btrfs_disk_key_objectid(&node->ptrs[i].key);
- if (item_objectid != objectid)
- break;
- blocknr = btrfs_node_blockptr(node, i);
- bh = sb_getblk(root->fs_info->sb, blocknr);
- ll_rw_block(READ, 1, &bh);
- brelse(bh);
- }
-
-}
-
-static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
-{
- struct inode *inode = filp->f_path.dentry->d_inode;
- struct btrfs_root *root = btrfs_sb(inode->i_sb);
- struct btrfs_item *item;
- struct btrfs_dir_item *di;
- struct btrfs_key key;
- struct btrfs_path path;
- int ret;
- u32 nritems;
- struct btrfs_leaf *leaf;
- int slot;
- int advance;
- unsigned char d_type = DT_UNKNOWN;
- int over = 0;
-
- key.objectid = inode->i_ino;
- key.flags = 0;
- btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
- key.offset = filp->f_pos;
- btrfs_init_path(&path);
- ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
- if (ret < 0) {
- goto err;
- }
- advance = 0;
- reada_leaves(root, &path);
- while(1) {
- leaf = btrfs_buffer_leaf(path.nodes[0]);
- nritems = btrfs_header_nritems(&leaf->header);
- slot = path.slots[0];
- if (advance) {
- if (slot == nritems -1) {
- ret = btrfs_next_leaf(root, &path);
- if (ret)
- break;
- leaf = btrfs_buffer_leaf(path.nodes[0]);
- nritems = btrfs_header_nritems(&leaf->header);
- slot = path.slots[0];
- if (path.nodes[1] && path.slots[1] == 0)
- reada_leaves(root, &path);
- } else {
- slot++;
- path.slots[0]++;
- }
- }
- advance = 1;
- item = leaf->items + slot;
- if (btrfs_disk_key_objectid(&item->key) != key.objectid)
- break;
- if (btrfs_disk_key_type(&item->key) != BTRFS_DIR_ITEM_KEY)
- continue;
- if (btrfs_disk_key_offset(&item->key) < filp->f_pos)
- continue;
- di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item);
- over = filldir(dirent, (const char *)(di + 1),
- btrfs_dir_name_len(di),
- btrfs_disk_key_offset(&item->key),
- btrfs_dir_objectid(di), d_type);
- if (over) {
- filp->f_pos = btrfs_disk_key_offset(&item->key);
- break;
- }
- filp->f_pos = btrfs_disk_key_offset(&item->key) + 1;
- }
- ret = 0;
-err:
- btrfs_release_path(root, &path);
- return ret;
-}
static void btrfs_put_super (struct super_block * sb)
{
struct inode * inode;
struct dentry * root_dentry;
struct btrfs_super_block *disk_super;
- struct buffer_head *bh;
- struct btrfs_root *root;
+ struct btrfs_root *tree_root;
+ struct btrfs_inode *bi;
+ int err;
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;
sb->s_op = &btrfs_super_ops;
sb->s_time_gran = 1;
- 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) {
+ tree_root = open_ctree(sb);
+
+ if (!tree_root || IS_ERR(tree_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));
- if (!inode)
- return -ENOMEM;
+ sb->s_fs_info = tree_root;
+ disk_super = tree_root->fs_info->disk_super;
+ inode = btrfs_iget_locked(sb, btrfs_super_root_dir(disk_super),
+ tree_root);
+ bi = BTRFS_I(inode);
+ bi->location.objectid = inode->i_ino;
+ bi->location.offset = 0;
+ bi->location.flags = 0;
+ bi->root = tree_root;
+ btrfs_set_key_type(&bi->location, BTRFS_INODE_ITEM_KEY);
+
+ if (!inode) {
+ err = -ENOMEM;
+ goto fail_close;
+ }
if (inode->i_state & I_NEW) {
btrfs_read_locked_inode(inode);
unlock_new_inode(inode);
root_dentry = d_alloc_root(inode);
if (!root_dentry) {
iput(inode);
- return -ENOMEM;
+ err = -ENOMEM;
+ goto fail_close;
}
sb->s_root = root_dentry;
-
+ btrfs_transaction_queue_work(tree_root, HZ * 30);
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 int btrfs_update_inode(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- struct inode *inode)
-{
- struct btrfs_inode_item *inode_item;
- struct btrfs_path path;
- int ret;
-
- btrfs_init_path(&path);
-
- ret = btrfs_lookup_inode(trans, root, &path, inode->i_ino, 1);
- if (ret) {
- if (ret > 0)
- ret = -ENOENT;
- goto failed;
- }
- inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]),
- path.slots[0],
- struct btrfs_inode_item);
-
- fill_inode_item(inode_item, inode);
- mark_buffer_dirty(path.nodes[0]);
-failed:
- btrfs_release_path(root, &path);
- return 0;
-}
-
-static int btrfs_write_inode(struct inode *inode, int wait)
-{
- struct btrfs_root *root = btrfs_sb(inode->i_sb);
- struct btrfs_trans_handle *trans;
- int ret;
-
- mutex_lock(&root->fs_info->fs_mutex);
- trans = btrfs_start_transaction(root, 1);
- ret = btrfs_update_inode(trans, root, inode);
- if (wait)
- btrfs_commit_transaction(trans, root);
- else
- btrfs_end_transaction(trans, root);
- mutex_unlock(&root->fs_info->fs_mutex);
- return ret;
-}
-
-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);
- 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);
- if (ret == 0) {
- dentry->d_parent->d_inode->i_size += dentry->d_name.len;
- ret = btrfs_update_inode(trans, btrfs_sb(inode->i_sb),
- dentry->d_parent->d_inode);
- }
-
- 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;
- int drop_inode = 0;
-
- mutex_lock(&root->fs_info->fs_mutex);
- trans = btrfs_start_transaction(root, 1);
- inode = btrfs_new_inode(trans, dir, mode);
- err = PTR_ERR(inode);
- if (IS_ERR(inode))
- goto out_unlock;
- // FIXME mark the inode dirty
- err = btrfs_add_nondir(trans, dentry, inode);
- if (err)
- drop_inode = 1;
- dir->i_sb->s_dirt = 1;
- btrfs_end_transaction(trans, root);
-out_unlock:
- mutex_unlock(&root->fs_info->fs_mutex);
- if (drop_inode) {
- inode_dec_link_count(inode);
- iput(inode);
- }
- return err;
-}
-
-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);
- if (ret)
- goto error;
- inode->i_size = 3;
- ret = btrfs_update_inode(trans, root, inode);
-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);
- 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);
+fail_close:
+ close_ctree(tree_root);
return err;
}
struct btrfs_trans_handle *trans;
struct btrfs_root *root;
int ret;
+ root = btrfs_sb(sb);
sb->s_dirt = 0;
if (!wait) {
- filemap_flush(sb->s_bdev->bd_inode->i_mapping);
+ filemap_flush(root->fs_info->btree_inode->i_mapping);
return 0;
}
- filemap_write_and_wait(sb->s_bdev->bd_inode->i_mapping);
-
- root = btrfs_sb(sb);
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
ret = btrfs_commit_transaction(trans, root);
sb->s_dirt = 0;
- BUG_ON(ret);
-printk("btrfs sync_fs\n");
mutex_unlock(&root->fs_info->fs_mutex);
- return 0;
+ return ret;
}
static void btrfs_write_super(struct super_block *sb)
{
- btrfs_sync_fs(sb, 1);
+ sb->s_dirt = 0;
}
-
static int btrfs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
btrfs_fill_super, mnt);
}
+static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct btrfs_root *root = btrfs_sb(dentry->d_sb);
+ struct btrfs_super_block *disk_super = root->fs_info->disk_super;
+
+ buf->f_namelen = BTRFS_NAME_LEN;
+ buf->f_blocks = btrfs_super_total_blocks(disk_super);
+ buf->f_bfree = buf->f_blocks - btrfs_super_blocks_used(disk_super);
+ buf->f_bavail = buf->f_bfree;
+ buf->f_bsize = dentry->d_sb->s_blocksize;
+ buf->f_type = BTRFS_SUPER_MAGIC;
+ return 0;
+}
+
static struct file_system_type btrfs_fs_type = {
.owner = THIS_MODULE,
.name = "btrfs",
};
static struct super_operations btrfs_super_ops = {
- .statfs = simple_statfs,
.delete_inode = btrfs_delete_inode,
.put_super = btrfs_put_super,
.read_inode = btrfs_read_locked_inode,
.write_super = btrfs_write_super,
.sync_fs = btrfs_sync_fs,
.write_inode = btrfs_write_inode,
+ .dirty_inode = btrfs_dirty_inode,
+ .alloc_inode = btrfs_alloc_inode,
+ .destroy_inode = btrfs_destroy_inode,
+ .statfs = btrfs_statfs,
};
-static struct inode_operations btrfs_dir_inode_operations = {
- .lookup = btrfs_lookup,
- .create = btrfs_create,
- .unlink = btrfs_unlink,
- .mkdir = btrfs_mkdir,
-};
-
-static struct file_operations btrfs_dir_file_operations = {
- .llseek = generic_file_llseek,
- .read = generic_read_dir,
- .readdir = btrfs_readdir,
-};
-
-
static int __init init_btrfs_fs(void)
{
- printk("btrfs loaded!\n");
+ int err;
+ btrfs_init_transaction_sys();
+ err = btrfs_init_cachep();
+ if (err)
+ return err;
return register_filesystem(&btrfs_fs_type);
}
static void __exit exit_btrfs_fs(void)
{
+ btrfs_exit_transaction_sys();
+ btrfs_destroy_cachep();
unregister_filesystem(&btrfs_fs_type);
- printk("btrfs unloaded\n");
}
module_init(init_btrfs_fs)
projects / linux-2.6-block.git / blobdiff