Btrfs: Implement mknod
Signed-off-by: Chris Mason <chris.mason@oracle.com>wifi-calibration
Josef Bacik
David Woodhouse
parent
a1f396304f
commit
618e21d595
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@ -46,6 +46,7 @@ struct btrfs_iget_args {
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static struct inode_operations btrfs_dir_inode_operations;
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static struct inode_operations btrfs_symlink_inode_operations;
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static struct inode_operations btrfs_dir_ro_inode_operations;
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static struct inode_operations btrfs_special_inode_operations;
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static struct inode_operations btrfs_file_inode_operations;
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static struct address_space_operations btrfs_aops;
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static struct address_space_operations btrfs_symlink_aops;
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@ -75,6 +76,7 @@ void btrfs_read_locked_inode(struct inode *inode)
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struct btrfs_root *root = BTRFS_I(inode)->root;
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struct btrfs_key location;
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u64 alloc_group_block;
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u32 rdev;
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int ret;
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path = btrfs_alloc_path();
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@ -104,6 +106,8 @@ void btrfs_read_locked_inode(struct inode *inode)
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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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inode->i_rdev = 0;
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rdev = btrfs_inode_rdev(inode_item);
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alloc_group_block = btrfs_inode_block_group(inode_item);
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BTRFS_I(inode)->block_group = btrfs_lookup_block_group(root->fs_info,
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alloc_group_block);
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@ -114,12 +118,6 @@ void btrfs_read_locked_inode(struct inode *inode)
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mutex_unlock(&root->fs_info->fs_mutex);
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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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inode->i_mapping->a_ops = &btrfs_aops;
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inode->i_fop = &btrfs_file_operations;
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@ -136,6 +134,9 @@ void btrfs_read_locked_inode(struct inode *inode)
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inode->i_op = &btrfs_symlink_inode_operations;
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inode->i_mapping->a_ops = &btrfs_symlink_aops;
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break;
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default:
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init_special_inode(inode, inode->i_mode, rdev);
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break;
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}
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return;
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@ -162,6 +163,7 @@ static void fill_inode_item(struct btrfs_inode_item *item,
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btrfs_set_timespec_nsec(&item->ctime, inode->i_ctime.tv_nsec);
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btrfs_set_inode_nblocks(item, inode->i_blocks);
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btrfs_set_inode_generation(item, inode->i_generation);
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btrfs_set_inode_rdev(item, inode->i_rdev);
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btrfs_set_inode_block_group(item,
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BTRFS_I(inode)->block_group->key.objectid);
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}
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@ -1070,6 +1072,58 @@ static int btrfs_add_nondir(struct btrfs_trans_handle *trans,
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return err;
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}
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static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
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int mode, dev_t rdev)
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{
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struct btrfs_trans_handle *trans;
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struct btrfs_root *root = BTRFS_I(dir)->root;
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struct inode *inode;
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int err;
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int drop_inode = 0;
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u64 objectid;
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if (!new_valid_dev(rdev))
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return -EINVAL;
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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_set_trans_block_group(trans, dir);
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err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
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if (err) {
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err = -ENOSPC;
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goto out_unlock;
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}
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inode = btrfs_new_inode(trans, root, objectid,
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BTRFS_I(dir)->block_group, mode);
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err = PTR_ERR(inode);
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if (IS_ERR(inode))
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goto out_unlock;
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btrfs_set_trans_block_group(trans, inode);
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err = btrfs_add_nondir(trans, dentry, inode);
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if (err)
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drop_inode = 1;
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else {
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inode->i_op = &btrfs_special_inode_operations;
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init_special_inode(inode, inode->i_mode, rdev);
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}
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dir->i_sb->s_dirt = 1;
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btrfs_update_inode_block_group(trans, inode);
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btrfs_update_inode_block_group(trans, dir);
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out_unlock:
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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 (drop_inode) {
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inode_dec_link_count(inode);
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iput(inode);
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}
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btrfs_btree_balance_dirty(root);
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return err;
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}
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static int btrfs_create(struct inode *dir, struct dentry *dentry,
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int mode, struct nameidata *nd)
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{
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@ -2526,6 +2580,7 @@ static struct inode_operations btrfs_dir_inode_operations = {
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.rename = btrfs_rename,
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.symlink = btrfs_symlink,
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.setattr = btrfs_setattr,
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.mknod = btrfs_mknod,
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};
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static struct inode_operations btrfs_dir_ro_inode_operations = {
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@ -2562,6 +2617,11 @@ static struct inode_operations btrfs_file_inode_operations = {
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.setattr = btrfs_setattr,
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};
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static struct inode_operations btrfs_special_inode_operations = {
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.getattr = btrfs_getattr,
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.setattr = btrfs_setattr,
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};
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static struct inode_operations btrfs_symlink_inode_operations = {
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.readlink = generic_readlink,
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.follow_link = page_follow_link_light,
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