+/*
+ * 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.
+ */
+
#ifndef __BTRFS__
#define __BTRFS__
#include <linux/fs.h>
#include <linux/buffer_head.h>
-#include <linux/kobject.h>
+#include <linux/workqueue.h>
+#include <linux/completion.h>
#include "bit-radix.h"
struct btrfs_trans_handle;
#define BTRFS_MAGIC "_BtRfS_M"
#define BTRFS_ROOT_TREE_OBJECTID 1ULL
-#define BTRFS_DEV_TREE_OBJECTID 2ULL
-#define BTRFS_EXTENT_TREE_OBJECTID 3ULL
-#define BTRFS_FS_TREE_OBJECTID 4ULL
-#define BTRFS_ROOT_TREE_DIR_OBJECTID 5ULL
-#define BTRFS_FIRST_FREE_OBJECTID 6ULL
+#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
+#define BTRFS_FS_TREE_OBJECTID 3ULL
+#define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
+#define BTRFS_FIRST_FREE_OBJECTID 5ULL
/*
* we can actually store much bigger names, but lets not confuse the rest
#define BTRFS_CRC32_SIZE 4
#define BTRFS_EMPTY_DIR_SIZE 6
+#define BTRFS_FT_UNKNOWN 0
+#define BTRFS_FT_REG_FILE 1
+#define BTRFS_FT_DIR 2
+#define BTRFS_FT_CHRDEV 3
+#define BTRFS_FT_BLKDEV 4
+#define BTRFS_FT_FIFO 5
+#define BTRFS_FT_SOCK 6
+#define BTRFS_FT_SYMLINK 7
+#define BTRFS_FT_MAX 8
+
/*
* the key defines the order in the tree, and so it also defines (optimal)
* block layout. objectid corresonds to the inode number. The flags
u8 fsid[16]; /* FS specific uuid */
__le64 blocknr; /* this block number */
__le64 magic;
- __le32 blocksize;
__le64 generation;
__le64 root;
__le64 total_blocks;
__le64 blocks_used;
__le64 root_dir_objectid;
- __le64 last_device_id;
- /* fields below here vary with the underlying disk */
- __le64 device_block_start;
- __le64 device_num_blocks;
- __le64 device_root;
- __le64 device_id;
+ __le32 blocksize;
} __attribute__ ((__packed__));
/*
struct btrfs_path {
struct buffer_head *nodes[BTRFS_MAX_LEVEL];
int slots[BTRFS_MAX_LEVEL];
+ int reada;
+ int lowest_level;
};
/*
struct btrfs_inode_item inode;
__le64 root_dirid;
__le64 blocknr;
- __le32 flags;
__le64 block_limit;
__le64 blocks_used;
+ __le32 flags;
__le32 refs;
+ struct btrfs_disk_key drop_progress;
+ u8 drop_level;
} __attribute__ ((__packed__));
#define BTRFS_FILE_EXTENT_REG 0
u8 csum;
} __attribute__ ((__packed__));
-struct btrfs_device_item {
- __le16 pathlen;
- __le64 device_id;
-} __attribute__ ((__packed__));
-
/* tag for the radix tree of block groups in ram */
#define BTRFS_BLOCK_GROUP_DIRTY 0
#define BTRFS_BLOCK_GROUP_AVAIL 1
-#define BTRFS_BLOCK_GROUP_HINTS 8
#define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
+
+
+#define BTRFS_BLOCK_GROUP_DATA 1
struct btrfs_block_group_item {
__le64 used;
+ u8 flags;
} __attribute__ ((__packed__));
struct btrfs_block_group_cache {
int cached;
};
-struct crypto_hash;
struct btrfs_fs_info {
struct btrfs_root *extent_root;
struct btrfs_root *tree_root;
- struct btrfs_root *dev_root;
struct radix_tree_root fs_roots_radix;
struct radix_tree_root pending_del_radix;
struct radix_tree_root pinned_radix;
- struct radix_tree_root dev_radix;
struct radix_tree_root block_group_radix;
struct radix_tree_root block_group_data_radix;
struct radix_tree_root extent_map_radix;
-
- u64 extent_tree_insert[BTRFS_MAX_LEVEL * 3];
- int extent_tree_insert_nr;
- u64 extent_tree_prealloc[BTRFS_MAX_LEVEL * 3];
- int extent_tree_prealloc_nr;
-
+ struct radix_tree_root extent_ins_radix;
u64 generation;
+ u64 last_trans_committed;
struct btrfs_transaction *running_transaction;
struct btrfs_super_block *disk_super;
+ struct btrfs_super_block super_copy;
struct buffer_head *sb_buffer;
struct super_block *sb;
struct inode *btree_inode;
struct mutex trans_mutex;
struct mutex fs_mutex;
struct list_head trans_list;
- struct crypto_hash *hash_tfm;
- spinlock_t hash_lock;
+ struct list_head dead_roots;
+ struct delayed_work trans_work;
+ struct kobject super_kobj;
+ struct completion kobj_unregister;
int do_barriers;
- struct kobject kobj;
+ int closing;
};
/*
struct btrfs_key root_key;
struct btrfs_fs_info *fs_info;
struct inode *inode;
+ struct kobject root_kobj;
+ struct completion kobj_unregister;
+ struct rw_semaphore snap_sem;
u64 objectid;
u64 last_trans;
u32 blocksize;
- int ref_cows;
u32 type;
u64 highest_inode;
u64 last_inode_alloc;
+ int ref_cows;
+ struct btrfs_key defrag_progress;
+ int defrag_running;
+ int defrag_level;
+ char *name;
};
/* the lower bits in the key flags defines the item type */
*/
#define BTRFS_BLOCK_GROUP_ITEM_KEY 34
-/*
- * dev items list the devices that make up the FS
- */
-#define BTRFS_DEV_ITEM_KEY 35
-
/*
* string items are for debugging. They just store a short string of
* data in the FS
item->refs = cpu_to_le32(val);
}
+static inline u32 btrfs_root_flags(struct btrfs_root_item *item)
+{
+ return le32_to_cpu(item->flags);
+}
+
+static inline void btrfs_set_root_flags(struct btrfs_root_item *item, u32 val)
+{
+ item->flags = cpu_to_le32(val);
+}
+
+static inline void btrfs_set_root_blocks_used(struct btrfs_root_item *item,
+ u64 val)
+{
+ item->blocks_used = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_root_blocks_used(struct btrfs_root_item *item)
+{
+ return le64_to_cpu(item->blocks_used);
+}
+
+static inline void btrfs_set_root_block_limit(struct btrfs_root_item *item,
+ u64 val)
+{
+ item->block_limit = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_root_block_limit(struct btrfs_root_item *item)
+{
+ return le64_to_cpu(item->block_limit);
+}
+
static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s)
{
return le64_to_cpu(s->blocknr);
s->root_dir_objectid = cpu_to_le64(val);
}
-static inline u64 btrfs_super_last_device_id(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->last_device_id);
-}
-
-static inline void btrfs_set_super_last_device_id(struct btrfs_super_block *s,
- u64 val)
-{
- s->last_device_id = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_id(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->device_id);
-}
-
-static inline void btrfs_set_super_device_id(struct btrfs_super_block *s,
- u64 val)
-{
- s->device_id = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_block_start(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->device_block_start);
-}
-
-static inline void btrfs_set_super_device_block_start(struct btrfs_super_block
- *s, u64 val)
-{
- s->device_block_start = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_num_blocks(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->device_num_blocks);
-}
-
-static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block
- *s, u64 val)
-{
- s->device_num_blocks = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_root(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->device_root);
-}
-
-static inline void btrfs_set_super_device_root(struct btrfs_super_block
- *s, u64 val)
-{
- s->device_root = cpu_to_le64(val);
-}
-
-
static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
{
return (u8 *)l->items;
e->num_blocks = cpu_to_le64(val);
}
-static inline u16 btrfs_device_pathlen(struct btrfs_device_item *d)
-{
- return le16_to_cpu(d->pathlen);
-}
-
-static inline void btrfs_set_device_pathlen(struct btrfs_device_item *d,
- u16 val)
-{
- d->pathlen = cpu_to_le16(val);
-}
-
-static inline u64 btrfs_device_id(struct btrfs_device_item *d)
-{
- return le64_to_cpu(d->device_id);
-}
-
-static inline void btrfs_set_device_id(struct btrfs_device_item *d,
- u64 val)
-{
- d->device_id = cpu_to_le64(val);
-}
-
static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
{
return sb->s_fs_info;
memmove(dst, src, nr);
}
-static inline void btrfs_mark_buffer_dirty(struct buffer_head *bh)
+static inline int btrfs_set_root_name(struct btrfs_root *root,
+ const char *name, int len)
{
- WARN_ON(!atomic_read(&bh->b_count));
- mark_buffer_dirty(bh);
+ /* if we already have a name just free it */
+ if (root->name)
+ kfree(root->name);
+
+ root->name = kmalloc(len+1, GFP_KERNEL);
+ if (!root->name)
+ return -ENOMEM;
+
+ memcpy(root->name, name, len);
+ root->name[len] ='\0';
+
+ return 0;
}
/* helper function to cast into the data area of the leaf. */
((type *)(btrfs_leaf_data(leaf) + \
btrfs_item_offset((leaf)->items + (slot))))
+/* mount option defines and helpers */
+#define BTRFS_MOUNT_SUBVOL 0x000001
+#define btrfs_clear_opt(o, opt) o &= ~BTRFS_MOUNT_##opt
+#define btrfs_set_opt(o, opt) o |= BTRFS_MOUNT_##opt
+#define btrfs_test_opt(sb, opt) (BTRFS_SB(sb)->s_mount_opt & \
+ BTRFS_MOUNT_##opt)
/* extent-tree.c */
+int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root);
+int btrfs_copy_pinned(struct btrfs_root *root, struct radix_tree_root *copy);
+struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
+ btrfs_fs_info *info,
+ u64 blocknr);
struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
struct btrfs_block_group_cache
*hint, u64 search_start,
int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 hint);
+ struct btrfs_root *root, u64 hint,
+ u64 empty_size);
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 owner,
- u64 num_blocks, u64 search_start,
+ u64 num_blocks, u64 empty_size, u64 search_start,
u64 search_end, struct btrfs_key *ins, int data);
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct buffer_head *buf);
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*root, u64 blocknr, u64 num_blocks, int pin);
-int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
- btrfs_root *root);
+int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct radix_tree_root *unpin_radix);
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 blocknr, u64 num_blocks);
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
/* ctree.c */
+int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root
+ *root, struct buffer_head *buf, struct buffer_head
+ *parent, int parent_slot, struct buffer_head
+ **cow_ret);
int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, u32 data_size);
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_key *key, struct btrfs_path *p, int
ins_len, int cow);
+int btrfs_realloc_node(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct buffer_head *parent,
+ int cache_only, u64 *last_ret);
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf);
int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct buffer_head *snap);
+ *root);
/* root-item.c */
int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_key *key);
*item);
int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
btrfs_root_item *item, struct btrfs_key *key);
+int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
+ struct btrfs_root *latest_root);
/* dir-item.c */
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
*root, const char *name, int name_len, u64 dir,
struct btrfs_root *root,
u64 objectid, u64 offset,
char *data, size_t len);
-int btrfs_csum_verify_file_block(struct btrfs_root *root,
- u64 objectid, u64 offset,
- char *data, size_t len);
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
u64 isize);
-/* super.c */
+/* inode.c */
+int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
+int btrfs_readpage(struct file *file, struct page *page);
+void btrfs_delete_inode(struct inode *inode);
+void btrfs_read_locked_inode(struct inode *inode);
+int btrfs_write_inode(struct inode *inode, int wait);
+void btrfs_dirty_inode(struct inode *inode);
+struct inode *btrfs_alloc_inode(struct super_block *sb);
+void btrfs_destroy_inode(struct inode *inode);
+int btrfs_init_cachep(void);
+void btrfs_destroy_cachep(void);
+int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+ unsigned long arg);
+long btrfs_compat_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg);
+struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
+ struct btrfs_root *root);
+int btrfs_commit_write(struct file *file, struct page *page,
+ unsigned from, unsigned to);
+int btrfs_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *result, int create);
+struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
+ size_t page_offset, u64 start, u64 end,
+ int create);
+int btrfs_update_inode(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct inode *inode);
+/* file.c */
+int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
+extern struct file_operations btrfs_file_operations;
+int btrfs_drop_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct inode *inode,
+ u64 start, u64 end, u64 *hint_block);
+/* tree-defrag.c */
+int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, int cache_only);
+
+/* sysfs.c */
+int btrfs_init_sysfs(void);
+void btrfs_exit_sysfs(void);
+int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
+int btrfs_sysfs_add_root(struct btrfs_root *root);
+void btrfs_sysfs_del_root(struct btrfs_root *root);
+void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
+
#endif
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