Btrfs: start of support for many FS volumes
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
David Woodhouse
parent
3eb0314dc1
commit
d6e4a428eb
9 changed files with 242 additions and 79 deletions
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@ -19,3 +19,10 @@
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* fsck
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* Scrub & defrag
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---
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metata FS ideas:
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mount metadata FS on /sys/fs/btrfs/dev/
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subvolumes in /sys/fs/btrfs/dev/fs/
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snapshots in /sys/fs/btrfs/dev/fs/snapshots
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mount -o bind
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ioctl to create a snapshot
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@ -3,6 +3,8 @@
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struct btrfs_inode {
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u32 magic;
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struct btrfs_root *root;
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struct btrfs_key location;
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struct inode vfs_inode;
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u32 magic2;
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};
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@ -3,6 +3,7 @@
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#include <linux/fs.h>
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#include <linux/buffer_head.h>
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#include <linux/kobject.h>
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#include "bit-radix.h"
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struct btrfs_trans_handle;
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@ -183,13 +184,15 @@ struct btrfs_inline_data_item {
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} __attribute__ ((__packed__));
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struct btrfs_dir_item {
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__le64 objectid;
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struct btrfs_disk_key location;
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__le16 flags;
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__le16 name_len;
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u8 type;
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} __attribute__ ((__packed__));
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struct btrfs_root_item {
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struct btrfs_inode_item inode;
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__le64 root_dirid;
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__le64 blocknr;
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__le32 flags;
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__le64 block_limit;
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@ -249,6 +252,7 @@ struct btrfs_fs_info {
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struct mutex fs_mutex;
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struct crypto_hash *hash_tfm;
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spinlock_t hash_lock;
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struct kobject kobj;
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};
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/*
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@ -504,16 +508,6 @@ static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val)
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item->size = cpu_to_le16(val);
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}
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static inline u64 btrfs_dir_objectid(struct btrfs_dir_item *d)
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{
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return le64_to_cpu(d->objectid);
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}
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static inline void btrfs_set_dir_objectid(struct btrfs_dir_item *d, u64 val)
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{
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d->objectid = cpu_to_le64(val);
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}
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static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d)
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{
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return le16_to_cpu(d->flags);
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@ -724,6 +718,16 @@ static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val)
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item->blocknr = cpu_to_le64(val);
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}
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static inline u64 btrfs_root_dirid(struct btrfs_root_item *item)
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{
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return le64_to_cpu(item->root_dirid);
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}
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static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val)
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{
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item->root_dirid = cpu_to_le64(val);
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}
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static inline u32 btrfs_root_refs(struct btrfs_root_item *item)
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{
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return le32_to_cpu(item->refs);
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@ -950,8 +954,8 @@ int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
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btrfs_root_item *item, struct btrfs_key *key);
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/* dir-item.c */
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int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, const char *name, int name_len, u64 dir, u64
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objectid, u8 type);
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*root, const char *name, int name_len, u64 dir,
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struct btrfs_key *location, u8 type);
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int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, struct btrfs_path *path, u64 dir,
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const char *name, int name_len, int mod);
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@ -978,7 +982,8 @@ int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, u64 objectid, struct btrfs_inode_item
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*inode_item);
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int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, struct btrfs_path *path, u64 objectid, int mod);
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*root, struct btrfs_path *path,
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struct btrfs_key *location, int mod);
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/* file-item.c */
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int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans,
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@ -997,4 +1002,7 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
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int btrfs_csum_verify_file_block(struct btrfs_root *root,
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u64 objectid, u64 offset,
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char *data, size_t len);
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/* super.c */
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extern struct subsystem btrfs_subsys;
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#endif
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@ -25,8 +25,8 @@ int insert_with_overflow(struct btrfs_trans_handle *trans, struct btrfs_root
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}
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int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, const char *name, int name_len, u64 dir, u64
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objectid, u8 type)
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*root, const char *name, int name_len, u64 dir,
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struct btrfs_key *location, u8 type)
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{
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int ret = 0;
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struct btrfs_path *path;
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@ -50,17 +50,21 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
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dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
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path->slots[0],
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struct btrfs_dir_item);
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btrfs_set_dir_objectid(dir_item, objectid);
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btrfs_cpu_key_to_disk(&dir_item->location, location);
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btrfs_set_dir_type(dir_item, type);
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btrfs_set_dir_flags(dir_item, 0);
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btrfs_set_dir_name_len(dir_item, name_len);
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name_ptr = (char *)(dir_item + 1);
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/* FIXME, use some real flag for selecting the extra index */
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if (root == root->fs_info->tree_root)
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goto out;
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btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len);
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btrfs_mark_buffer_dirty(path->nodes[0]);
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btrfs_release_path(root, path);
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btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY);
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key.offset = objectid;
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key.offset = location->objectid;
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ret = insert_with_overflow(trans, root, path, &key, data_size);
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// FIXME clear the dirindex bit
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if (ret)
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@ -69,7 +73,7 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
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dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
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path->slots[0],
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struct btrfs_dir_item);
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btrfs_set_dir_objectid(dir_item, objectid);
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btrfs_cpu_key_to_disk(&dir_item->location, location);
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btrfs_set_dir_type(dir_item, type);
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btrfs_set_dir_flags(dir_item, 0);
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btrfs_set_dir_name_len(dir_item, name_len);
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@ -338,7 +338,6 @@ struct btrfs_root *open_ctree(struct super_block *sb)
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sb->s_blocksize);
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if (!fs_info->sb_buffer) {
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printk("failed2\n");
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return NULL;
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}
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disk_super = (struct btrfs_super_block *)fs_info->sb_buffer->b_data;
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@ -369,6 +368,10 @@ printk("failed2\n");
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ret = btrfs_find_highest_inode(root, &root->fs_info->last_inode_alloc);
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if (ret == 0)
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fs_info->highest_inode = fs_info->last_inode_alloc;
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memset(&fs_info->kobj, 0, sizeof(fs_info->kobj));
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kobj_set_kset_s(fs_info, btrfs_subsys);
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kobject_set_name(&fs_info->kobj, "%s", sb->s_id);
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kobject_register(&fs_info->kobj);
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mutex_unlock(&fs_info->fs_mutex);
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return root;
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}
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@ -430,7 +433,7 @@ int close_ctree(struct btrfs_root *root)
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kfree(root->fs_info->extent_root);
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kfree(root->fs_info->inode_root);
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kfree(root->fs_info->tree_root);
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kfree(root->fs_info);
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kobject_unregister(&root->fs_info->kobj);
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kfree(root);
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return 0;
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}
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@ -26,15 +26,27 @@ int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
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}
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int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, struct btrfs_path *path, u64 objectid, int mod)
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*root, struct btrfs_path *path,
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struct btrfs_key *location, int mod)
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{
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struct btrfs_key key;
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int ins_len = mod < 0 ? -1 : 0;
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int cow = mod != 0;
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int ret;
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int slot;
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struct btrfs_leaf *leaf;
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struct btrfs_key found_key;
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key.objectid = objectid;
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key.flags = 0;
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btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
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key.offset = 0;
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return btrfs_search_slot(trans, root, &key, path, ins_len, cow);
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ret = btrfs_search_slot(trans, root, location, path, ins_len, cow);
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if (ret > 0 && btrfs_key_type(location) == BTRFS_ROOT_ITEM_KEY &&
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location->offset == (u64)-1 && path->slots[0] != 0) {
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slot = path->slots[0] - 1;
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leaf = btrfs_buffer_leaf(path->nodes[0]);
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btrfs_disk_key_to_cpu(&found_key, &leaf->items[slot].key);
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if (found_key.objectid == location->objectid &&
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btrfs_key_type(&found_key) == btrfs_key_type(location)) {
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path->slots[0]--;
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return 0;
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}
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}
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return ret;
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}
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@ -38,7 +38,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
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case BTRFS_DIR_ITEM_KEY:
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di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
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printk("\t\tdir oid %Lu flags %u type %u\n",
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btrfs_dir_objectid(di),
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btrfs_disk_key_objectid(&di->location),
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btrfs_dir_flags(di),
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btrfs_dir_type(di));
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printk("\t\tname %.*s\n",
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218
fs/btrfs/super.c
218
fs/btrfs/super.c
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@ -16,9 +16,23 @@
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#include "transaction.h"
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#include "btrfs_inode.h"
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void btrfs_fsinfo_release(struct kobject *obj)
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{
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struct btrfs_fs_info *fsinfo = container_of(obj,
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struct btrfs_fs_info, kobj);
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kfree(fsinfo);
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}
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struct kobj_type btrfs_fsinfo_ktype = {
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.release = btrfs_fsinfo_release,
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};
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decl_subsys(btrfs, &btrfs_fsinfo_ktype, NULL);
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#define BTRFS_SUPER_MAGIC 0x9123682E
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static struct inode_operations btrfs_dir_inode_operations;
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static struct inode_operations btrfs_dir_ro_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 struct inode_operations btrfs_file_inode_operations;
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@ -37,7 +51,8 @@ static void btrfs_read_locked_inode(struct inode *inode)
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{
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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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struct btrfs_root *root = BTRFS_I(inode)->root;
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struct btrfs_key location;
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int ret;
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path = btrfs_alloc_path();
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@ -46,13 +61,12 @@ static void btrfs_read_locked_inode(struct inode *inode)
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mutex_lock(&root->fs_info->fs_mutex);
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check_inode(inode);
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ret = btrfs_lookup_inode(NULL, root, path, inode->i_ino, 0);
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memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));
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ret = btrfs_lookup_inode(NULL, root, path, &location, 0);
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if (ret) {
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btrfs_release_path(root, path);
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btrfs_free_path(path);
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mutex_unlock(&root->fs_info->fs_mutex);
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make_bad_inode(inode);
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return;
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goto make_bad;
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}
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check_inode(inode);
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inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
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@ -73,7 +87,6 @@ static void btrfs_read_locked_inode(struct inode *inode)
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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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btrfs_free_path(path);
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inode_item = NULL;
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@ -92,8 +105,11 @@ static void btrfs_read_locked_inode(struct inode *inode)
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inode->i_op = &btrfs_file_inode_operations;
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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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if (root == root->fs_info->tree_root)
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inode->i_op = &btrfs_dir_ro_inode_operations;
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else
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inode->i_op = &btrfs_dir_inode_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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@ -101,6 +117,12 @@ static void btrfs_read_locked_inode(struct inode *inode)
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}
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check_inode(inode);
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return;
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make_bad:
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btrfs_release_path(root, path);
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btrfs_free_path(path);
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mutex_unlock(&root->fs_info->fs_mutex);
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make_bad_inode(inode);
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}
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static int btrfs_unlink_trans(struct btrfs_trans_handle *trans,
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@ -128,7 +150,7 @@ static int btrfs_unlink_trans(struct btrfs_trans_handle *trans,
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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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objectid = btrfs_disk_key_objectid(&di->location);
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ret = btrfs_del_item(trans, root, path);
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BUG_ON(ret);
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@ -157,7 +179,7 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
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struct btrfs_trans_handle *trans;
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int ret;
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root = btrfs_sb(dir->i_sb);
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root = BTRFS_I(dir)->root;
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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_unlink_trans(trans, root, dir, dentry);
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@ -171,7 +193,7 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
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struct inode *inode = dentry->d_inode;
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int err;
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int ret;
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struct btrfs_root *root = btrfs_sb(dir->i_sb);
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struct btrfs_root *root = BTRFS_I(dir)->root;
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struct btrfs_path *path;
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struct btrfs_key key;
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struct btrfs_trans_handle *trans;
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@ -268,7 +290,8 @@ static int btrfs_free_inode(struct btrfs_trans_handle *trans,
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BUG_ON(ret);
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btrfs_release_path(root, path);
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ret = btrfs_lookup_inode(trans, root, path, objectid, -1);
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ret = btrfs_lookup_inode(trans, root, path,
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&BTRFS_I(inode)->location, -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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@ -355,7 +378,7 @@ error:
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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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struct btrfs_root *root = BTRFS_I(inode)->root;
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int ret;
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truncate_inode_pages(&inode->i_data, 0);
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@ -378,13 +401,13 @@ no_delete:
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}
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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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struct btrfs_key *location)
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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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struct btrfs_root *root = BTRFS_I(dir)->root;
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int ret;
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path = btrfs_alloc_path();
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@ -393,13 +416,13 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
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ret = btrfs_lookup_dir_item(NULL, root, path, dir->i_ino, name,
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namelen, 0);
|
||||
if (ret || !btrfs_match_dir_item_name(root, path, name, namelen)) {
|
||||
*ino = 0;
|
||||
location->objectid = 0;
|
||||
ret = 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);
|
||||
btrfs_disk_key_to_cpu(location, &di->location);
|
||||
out:
|
||||
btrfs_release_path(root, path);
|
||||
btrfs_free_path(path);
|
||||
|
|
@ -407,26 +430,76 @@ out:
|
|||
return ret;
|
||||
}
|
||||
|
||||
int fixup_tree_root_location(struct btrfs_root *root,
|
||||
struct btrfs_key *location,
|
||||
struct btrfs_root **sub_root)
|
||||
{
|
||||
struct btrfs_path *path;
|
||||
struct btrfs_root_item *ri;
|
||||
int ret;
|
||||
|
||||
if (btrfs_key_type(location) != BTRFS_ROOT_ITEM_KEY)
|
||||
return 0;
|
||||
if (location->objectid == BTRFS_ROOT_TREE_OBJECTID)
|
||||
return 0;
|
||||
|
||||
path = btrfs_alloc_path();
|
||||
BUG_ON(!path);
|
||||
mutex_lock(&root->fs_info->fs_mutex);
|
||||
|
||||
ret = btrfs_lookup_inode(NULL, root, path, location, 0);
|
||||
if (ret)
|
||||
goto out;
|
||||
ri = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
|
||||
path->slots[0],
|
||||
struct btrfs_root_item);
|
||||
location->objectid = btrfs_root_dirid(ri);
|
||||
location->flags = 0;
|
||||
btrfs_set_key_type(location, BTRFS_INODE_ITEM_KEY);
|
||||
location->offset = 0;
|
||||
/* FIXME properly select the root */
|
||||
*sub_root = root->fs_info->fs_root;
|
||||
out:
|
||||
btrfs_free_path(path);
|
||||
mutex_unlock(&root->fs_info->fs_mutex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
|
||||
struct nameidata *nd)
|
||||
{
|
||||
struct inode * inode;
|
||||
struct btrfs_root *root = btrfs_sb(dir->i_sb);
|
||||
ino_t ino;
|
||||
struct btrfs_inode *bi = BTRFS_I(dir);
|
||||
struct btrfs_root *root = bi->root;
|
||||
struct btrfs_root *sub_root = root;
|
||||
struct btrfs_key location;
|
||||
int ret;
|
||||
|
||||
if (dentry->d_name.len > BTRFS_NAME_LEN)
|
||||
return ERR_PTR(-ENAMETOOLONG);
|
||||
mutex_lock(&root->fs_info->fs_mutex);
|
||||
ret = btrfs_inode_by_name(dir, dentry, &ino);
|
||||
ret = btrfs_inode_by_name(dir, dentry, &location);
|
||||
mutex_unlock(&root->fs_info->fs_mutex);
|
||||
if (ret < 0)
|
||||
return ERR_PTR(ret);
|
||||
inode = NULL;
|
||||
if (ino) {
|
||||
inode = iget(dir->i_sb, ino);
|
||||
if (location.objectid) {
|
||||
ret = fixup_tree_root_location(root, &location, &sub_root);
|
||||
if (ret < 0)
|
||||
return ERR_PTR(ret);
|
||||
if (ret > 0)
|
||||
return ERR_PTR(-ENOENT);
|
||||
inode = iget_locked(dir->i_sb, location.objectid);
|
||||
if (!inode)
|
||||
return ERR_PTR(-EACCES);
|
||||
if (inode->i_state & I_NEW) {
|
||||
BTRFS_I(inode)->root = sub_root;
|
||||
memcpy(&BTRFS_I(inode)->location, &location,
|
||||
sizeof(location));
|
||||
btrfs_read_locked_inode(inode);
|
||||
unlock_new_inode(inode);
|
||||
}
|
||||
check_inode(inode);
|
||||
}
|
||||
check_inode(dir);
|
||||
|
|
@ -436,7 +509,7 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
|
|||
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_root *root = BTRFS_I(inode)->root;
|
||||
struct btrfs_item *item;
|
||||
struct btrfs_dir_item *di;
|
||||
struct btrfs_key key;
|
||||
|
|
@ -448,11 +521,16 @@ static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
|
|||
int advance;
|
||||
unsigned char d_type = DT_UNKNOWN;
|
||||
int over = 0;
|
||||
int key_type = BTRFS_DIR_INDEX_KEY;
|
||||
|
||||
/* FIXME, use a real flag for deciding about the key type */
|
||||
if (root->fs_info->tree_root == root)
|
||||
key_type = BTRFS_DIR_ITEM_KEY;
|
||||
|
||||
mutex_lock(&root->fs_info->fs_mutex);
|
||||
key.objectid = inode->i_ino;
|
||||
key.flags = 0;
|
||||
btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY);
|
||||
btrfs_set_key_type(&key, key_type);
|
||||
key.offset = filp->f_pos;
|
||||
path = btrfs_alloc_path();
|
||||
btrfs_init_path(path);
|
||||
|
|
@ -482,10 +560,11 @@ static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
|
|||
item = leaf->items + slot;
|
||||
if (btrfs_disk_key_objectid(&item->key) != key.objectid)
|
||||
break;
|
||||
if (btrfs_disk_key_offset(&item->key) >
|
||||
if (key_type == BTRFS_DIR_INDEX_KEY &&
|
||||
btrfs_disk_key_offset(&item->key) >
|
||||
root->fs_info->highest_inode)
|
||||
break;
|
||||
if (btrfs_disk_key_type(&item->key) != BTRFS_DIR_INDEX_KEY)
|
||||
if (btrfs_disk_key_type(&item->key) != key_type)
|
||||
continue;
|
||||
if (btrfs_disk_key_offset(&item->key) < filp->f_pos)
|
||||
continue;
|
||||
|
|
@ -495,7 +574,7 @@ static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
|
|||
over = filldir(dirent, (const char *)(di + 1),
|
||||
btrfs_dir_name_len(di),
|
||||
btrfs_disk_key_offset(&item->key),
|
||||
btrfs_dir_objectid(di), d_type);
|
||||
btrfs_disk_key_objectid(&di->location), d_type);
|
||||
if (over)
|
||||
goto nopos;
|
||||
}
|
||||
|
|
@ -527,6 +606,7 @@ static int btrfs_fill_super(struct super_block * sb, void * data, int silent)
|
|||
struct dentry * root_dentry;
|
||||
struct btrfs_super_block *disk_super;
|
||||
struct btrfs_root *root;
|
||||
struct btrfs_inode *bi;
|
||||
|
||||
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
||||
sb->s_magic = BTRFS_SUPER_MAGIC;
|
||||
|
|
@ -546,6 +626,13 @@ static int btrfs_fill_super(struct super_block * sb, void * data, int silent)
|
|||
btrfs_super_root_dir(disk_super));
|
||||
|
||||
inode = iget_locked(sb, btrfs_super_root_dir(disk_super));
|
||||
bi = BTRFS_I(inode);
|
||||
bi->location.objectid = inode->i_ino;
|
||||
bi->location.offset = 0;
|
||||
bi->location.flags = 0;
|
||||
bi->root = root->fs_info->tree_root;
|
||||
btrfs_set_key_type(&bi->location, BTRFS_INODE_ITEM_KEY);
|
||||
|
||||
if (!inode)
|
||||
return -ENOMEM;
|
||||
if (inode->i_state & I_NEW) {
|
||||
|
|
@ -594,7 +681,8 @@ static int btrfs_update_inode(struct btrfs_trans_handle *trans,
|
|||
BUG_ON(!path);
|
||||
btrfs_init_path(path);
|
||||
|
||||
ret = btrfs_lookup_inode(trans, root, path, inode->i_ino, 1);
|
||||
ret = btrfs_lookup_inode(trans, root, path,
|
||||
&BTRFS_I(inode)->location, 1);
|
||||
if (ret) {
|
||||
if (ret > 0)
|
||||
ret = -ENOENT;
|
||||
|
|
@ -616,7 +704,7 @@ failed:
|
|||
|
||||
static int btrfs_write_inode(struct inode *inode, int wait)
|
||||
{
|
||||
struct btrfs_root *root = btrfs_sb(inode->i_sb);
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
struct btrfs_trans_handle *trans;
|
||||
int ret;
|
||||
|
||||
|
|
@ -637,8 +725,8 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
|
|||
{
|
||||
struct inode *inode;
|
||||
struct btrfs_inode_item inode_item;
|
||||
struct btrfs_root *root = btrfs_sb(dir->i_sb);
|
||||
struct btrfs_key key;
|
||||
struct btrfs_root *root = BTRFS_I(dir)->root;
|
||||
struct btrfs_key *key;
|
||||
int ret;
|
||||
u64 objectid;
|
||||
|
||||
|
|
@ -646,6 +734,8 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
|
|||
if (!inode)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
BTRFS_I(inode)->root = BTRFS_I(dir)->root;
|
||||
key = &BTRFS_I(inode)->location;
|
||||
check_inode(inode);
|
||||
ret = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
|
||||
BUG_ON(ret);
|
||||
|
|
@ -658,11 +748,11 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
|
|||
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);
|
||||
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);
|
||||
|
|
@ -678,13 +768,20 @@ 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),
|
||||
struct btrfs_key key;
|
||||
struct btrfs_root *root = BTRFS_I(dentry->d_parent->d_inode)->root;
|
||||
key.objectid = inode->i_ino;
|
||||
key.flags = 0;
|
||||
btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
|
||||
key.offset = 0;
|
||||
|
||||
ret = btrfs_insert_dir_item(trans, root,
|
||||
dentry->d_name.name, dentry->d_name.len,
|
||||
dentry->d_parent->d_inode->i_ino,
|
||||
inode->i_ino, 0);
|
||||
&key, 0);
|
||||
if (ret == 0) {
|
||||
dentry->d_parent->d_inode->i_size += dentry->d_name.len * 2;
|
||||
ret = btrfs_update_inode(trans, btrfs_sb(inode->i_sb),
|
||||
ret = btrfs_update_inode(trans, root,
|
||||
dentry->d_parent->d_inode);
|
||||
}
|
||||
check_inode(inode);
|
||||
|
|
@ -710,7 +807,7 @@ 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 btrfs_root *root = BTRFS_I(dir)->root;
|
||||
struct inode *inode;
|
||||
int err;
|
||||
int drop_inode = 0;
|
||||
|
|
@ -747,18 +844,26 @@ out_unlock:
|
|||
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);
|
||||
struct btrfs_root *root = BTRFS_I(dir)->root;
|
||||
int ret;
|
||||
char buf[2];
|
||||
struct btrfs_key key;
|
||||
|
||||
buf[0] = '.';
|
||||
buf[1] = '.';
|
||||
|
||||
key.objectid = inode->i_ino;
|
||||
key.offset = 0;
|
||||
key.flags = 0;
|
||||
btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
|
||||
|
||||
ret = btrfs_insert_dir_item(trans, root, buf, 1, inode->i_ino,
|
||||
inode->i_ino, 1);
|
||||
&key, 1);
|
||||
if (ret)
|
||||
goto error;
|
||||
key.objectid = dir->i_ino;
|
||||
ret = btrfs_insert_dir_item(trans, root, buf, 2, inode->i_ino,
|
||||
dir->i_ino, 1);
|
||||
&key, 1);
|
||||
if (ret)
|
||||
goto error;
|
||||
inode->i_size = 6;
|
||||
|
|
@ -771,7 +876,7 @@ 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);
|
||||
struct btrfs_root *root = BTRFS_I(dir)->root;
|
||||
int err = 0;
|
||||
int drop_on_err = 0;
|
||||
|
||||
|
|
@ -910,7 +1015,7 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
|
|||
u64 extent_end = 0;
|
||||
u64 objectid = inode->i_ino;
|
||||
struct btrfs_path *path;
|
||||
struct btrfs_root *root = btrfs_sb(inode->i_sb);
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
struct btrfs_trans_handle *trans = NULL;
|
||||
struct btrfs_file_extent_item *item;
|
||||
struct btrfs_leaf *leaf;
|
||||
|
|
@ -999,7 +1104,7 @@ static int btrfs_get_block(struct inode *inode, sector_t iblock,
|
|||
struct buffer_head *result, int create)
|
||||
{
|
||||
int err;
|
||||
struct btrfs_root *root = btrfs_sb(inode->i_sb);
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
mutex_lock(&root->fs_info->fs_mutex);
|
||||
err = btrfs_get_block_lock(inode, iblock, result, create);
|
||||
// err = btrfs_get_block_inline(inode, iblock, result, create);
|
||||
|
|
@ -1041,7 +1146,7 @@ static int btrfs_writepage(struct page *page, struct writeback_control *wbc)
|
|||
|
||||
static void btrfs_truncate(struct inode *inode)
|
||||
{
|
||||
struct btrfs_root *root = btrfs_sb(inode->i_sb);
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
int ret;
|
||||
struct btrfs_trans_handle *trans;
|
||||
|
||||
|
|
@ -1208,7 +1313,7 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
|
|||
int err = 0;
|
||||
int ret = 0;
|
||||
struct inode *inode = file->f_path.dentry->d_inode;
|
||||
struct btrfs_root *root = btrfs_sb(inode->i_sb);
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
struct page *pages[1];
|
||||
|
||||
if (file->f_flags & O_DIRECT)
|
||||
|
|
@ -1365,7 +1470,7 @@ static ssize_t btrfs_file_inline_write(struct file *file,
|
|||
int err = 0;
|
||||
int ret = 0;
|
||||
struct inode *inode = file->f_path.dentry->d_inode;
|
||||
struct btrfs_root *root = btrfs_sb(inode->i_sb);
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
unsigned long page_index;
|
||||
|
||||
if (file->f_flags & O_DIRECT)
|
||||
|
|
@ -1432,13 +1537,14 @@ static int btrfs_read_actor(read_descriptor_t *desc, struct page *page,
|
|||
{
|
||||
char *kaddr;
|
||||
unsigned long left, count = desc->count;
|
||||
struct inode *inode = page->mapping->host;
|
||||
|
||||
if (size > count)
|
||||
size = count;
|
||||
|
||||
if (!PageChecked(page)) {
|
||||
/* FIXME, do it per block */
|
||||
struct btrfs_root *root = btrfs_sb(page->mapping->host->i_sb);
|
||||
struct btrfs_root *root = BTRFS_I(inode)->root;
|
||||
int ret = btrfs_csum_verify_file_block(root,
|
||||
page->mapping->host->i_ino,
|
||||
page->index << PAGE_CACHE_SHIFT,
|
||||
|
|
@ -1662,6 +1768,10 @@ static struct inode_operations btrfs_dir_inode_operations = {
|
|||
.rmdir = btrfs_rmdir,
|
||||
};
|
||||
|
||||
static struct inode_operations btrfs_dir_ro_inode_operations = {
|
||||
.lookup = btrfs_lookup,
|
||||
};
|
||||
|
||||
static struct file_operations btrfs_dir_file_operations = {
|
||||
.llseek = generic_file_llseek,
|
||||
.read = generic_read_dir,
|
||||
|
|
@ -1697,13 +1807,21 @@ static int __init init_btrfs_fs(void)
|
|||
err = init_inodecache();
|
||||
if (err)
|
||||
return err;
|
||||
kset_set_kset_s(&btrfs_subsys, fs_subsys);
|
||||
err = subsystem_register(&btrfs_subsys);
|
||||
if (err)
|
||||
goto out;
|
||||
return register_filesystem(&btrfs_fs_type);
|
||||
out:
|
||||
destroy_inodecache();
|
||||
return err;
|
||||
}
|
||||
|
||||
static void __exit exit_btrfs_fs(void)
|
||||
{
|
||||
destroy_inodecache();
|
||||
unregister_filesystem(&btrfs_fs_type);
|
||||
subsystem_unregister(&btrfs_subsys);
|
||||
printk("btrfs unloaded\n");
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -52,6 +52,8 @@ struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
|
|||
kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS);
|
||||
int ret;
|
||||
|
||||
/* FIXME, use the right root */
|
||||
root = root->fs_info->fs_root;
|
||||
mutex_lock(&root->fs_info->trans_mutex);
|
||||
ret = join_transaction(root);
|
||||
BUG_ON(ret);
|
||||
|
|
@ -69,6 +71,10 @@ int btrfs_end_transaction(struct btrfs_trans_handle *trans,
|
|||
struct btrfs_root *root)
|
||||
{
|
||||
struct btrfs_transaction *cur_trans;
|
||||
|
||||
/* FIXME, use the right root */
|
||||
root = root->fs_info->fs_root;
|
||||
|
||||
WARN_ON(trans->magic != TRANS_MAGIC);
|
||||
WARN_ON(trans->magic2 != TRANS_MAGIC);
|
||||
mutex_lock(&root->fs_info->trans_mutex);
|
||||
|
|
@ -148,6 +154,9 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
|
|||
struct btrfs_transaction *cur_trans;
|
||||
DEFINE_WAIT(wait);
|
||||
|
||||
/* FIXME, use the right root */
|
||||
root = root->fs_info->fs_root;
|
||||
|
||||
mutex_lock(&root->fs_info->trans_mutex);
|
||||
if (trans->transaction->in_commit) {
|
||||
printk("already in commit!, waiting\n");
|
||||
|
|
|
|||
Loading…
Reference in a new issue