static int nilfs_do_unlink(struct inode *dir, struct dentry *dentry) { struct inode *inode; struct nilfs_dir_entry *de; struct page *page; int err; err = -ENOENT; de = nilfs_find_entry(dir, &dentry->d_name, &page); if (!de) goto out; inode = dentry->d_inode; err = -EIO; if (le64_to_cpu(de->inode) != inode->i_ino) goto out; if (!inode->i_nlink) { nilfs_warning(inode->i_sb, __func__, "deleting nonexistent file (%lu), %d\n", inode->i_ino, inode->i_nlink); set_nlink(inode, 1); } err = nilfs_delete_entry(de, page); if (err) goto out; inode->i_ctime = dir->i_ctime; drop_nlink(inode); err = 0; out: return err; }
static int nilfs_unlink(struct inode *dir, struct dentry *dentry) { struct inode *inode; struct nilfs_dir_entry *de; struct page *page; struct nilfs_transaction_info ti; int err; err = nilfs_transaction_begin(dir->i_sb, &ti, 0); if (err) return err; err = -ENOENT; de = nilfs_find_entry(dir, dentry, &page); if (!de) goto out; inode = dentry->d_inode; err = -EIO; if (le64_to_cpu(de->inode) != inode->i_ino) goto out; if (!inode->i_nlink) { nilfs_warning(inode->i_sb, __func__, "deleting nonexistent file (%lu), %d\n", inode->i_ino, inode->i_nlink); inode->i_nlink = 1; } err = nilfs_delete_entry(de, page); if (err) goto out; inode->i_ctime = dir->i_ctime; inode_dec_link_count(inode); err = 0; out: if (!err) err = nilfs_transaction_commit(dir->i_sb); else nilfs_transaction_abort(dir->i_sb); return err; }
static int nilfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry) { struct inode *old_inode = old_dentry->d_inode; struct inode *new_inode = new_dentry->d_inode; struct page *dir_page = NULL; struct nilfs_dir_entry *dir_de = NULL; struct page *old_page; struct nilfs_dir_entry *old_de; struct nilfs_transaction_info ti; int err; err = nilfs_transaction_begin(old_dir->i_sb, &ti, 1); if (unlikely(err)) return err; err = -ENOENT; old_de = nilfs_find_entry(old_dir, old_dentry, &old_page); if (!old_de) goto out; if (S_ISDIR(old_inode->i_mode)) { err = -EIO; dir_de = nilfs_dotdot(old_inode, &dir_page); if (!dir_de) goto out_old; } if (new_inode) { struct page *new_page; struct nilfs_dir_entry *new_de; err = -ENOTEMPTY; if (dir_de && !nilfs_empty_dir(new_inode)) goto out_dir; err = -ENOENT; new_de = nilfs_find_entry(new_dir, new_dentry, &new_page); if (!new_de) goto out_dir; inode_inc_link_count(old_inode); nilfs_set_link(new_dir, new_de, new_page, old_inode); new_inode->i_ctime = CURRENT_TIME; if (dir_de) drop_nlink(new_inode); inode_dec_link_count(new_inode); } else { if (dir_de) { err = -EMLINK; if (new_dir->i_nlink >= NILFS_LINK_MAX) goto out_dir; } inode_inc_link_count(old_inode); err = nilfs_add_link(new_dentry, old_inode); if (err) { inode_dec_link_count(old_inode); goto out_dir; } if (dir_de) inode_inc_link_count(new_dir); } /* * Like most other Unix systems, set the ctime for inodes on a * rename. * inode_dec_link_count() will mark the inode dirty. */ old_inode->i_ctime = CURRENT_TIME; nilfs_delete_entry(old_de, old_page); inode_dec_link_count(old_inode); if (dir_de) { nilfs_set_link(old_inode, dir_de, dir_page, new_dir); inode_dec_link_count(old_dir); } err = nilfs_transaction_commit(old_dir->i_sb); return err; out_dir: if (dir_de) { kunmap(dir_page); page_cache_release(dir_page); } out_old: kunmap(old_page); page_cache_release(old_page); out: nilfs_transaction_abort(old_dir->i_sb); return err; }
static int nilfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags) { struct inode *old_inode = d_inode(old_dentry); struct inode *new_inode = d_inode(new_dentry); struct page *dir_page = NULL; struct nilfs_dir_entry *dir_de = NULL; struct page *old_page; struct nilfs_dir_entry *old_de; struct nilfs_transaction_info ti; int err; if (flags & ~RENAME_NOREPLACE) return -EINVAL; err = nilfs_transaction_begin(old_dir->i_sb, &ti, 1); if (unlikely(err)) return err; err = -ENOENT; old_de = nilfs_find_entry(old_dir, &old_dentry->d_name, &old_page); if (!old_de) goto out; if (S_ISDIR(old_inode->i_mode)) { err = -EIO; dir_de = nilfs_dotdot(old_inode, &dir_page); if (!dir_de) goto out_old; } if (new_inode) { struct page *new_page; struct nilfs_dir_entry *new_de; err = -ENOTEMPTY; if (dir_de && !nilfs_empty_dir(new_inode)) goto out_dir; err = -ENOENT; new_de = nilfs_find_entry(new_dir, &new_dentry->d_name, &new_page); if (!new_de) goto out_dir; nilfs_set_link(new_dir, new_de, new_page, old_inode); nilfs_mark_inode_dirty(new_dir); new_inode->i_ctime = current_time(new_inode); if (dir_de) drop_nlink(new_inode); drop_nlink(new_inode); nilfs_mark_inode_dirty(new_inode); } else { err = nilfs_add_link(new_dentry, old_inode); if (err) goto out_dir; if (dir_de) { inc_nlink(new_dir); nilfs_mark_inode_dirty(new_dir); } } /* * Like most other Unix systems, set the ctime for inodes on a * rename. */ old_inode->i_ctime = current_time(old_inode); nilfs_delete_entry(old_de, old_page); if (dir_de) { nilfs_set_link(old_inode, dir_de, dir_page, new_dir); drop_nlink(old_dir); } nilfs_mark_inode_dirty(old_dir); nilfs_mark_inode_dirty(old_inode); err = nilfs_transaction_commit(old_dir->i_sb); return err; out_dir: if (dir_de) { kunmap(dir_page); put_page(dir_page); } out_old: kunmap(old_page); put_page(old_page); out: nilfs_transaction_abort(old_dir->i_sb); return err; }
static int nilfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry) { struct inode *old_inode = old_dentry->d_inode; struct inode *new_inode = new_dentry->d_inode; struct page *dir_page = NULL; struct nilfs_dir_entry *dir_de = NULL; struct page *old_page; struct nilfs_dir_entry *old_de; struct nilfs_transaction_info ti; int err; err = nilfs_transaction_begin(old_dir->i_sb, &ti, 1); if (unlikely(err)) return err; err = -ENOENT; old_de = nilfs_find_entry(old_dir, &old_dentry->d_name, &old_page); if (!old_de) goto out; if (S_ISDIR(old_inode->i_mode)) { err = -EIO; dir_de = nilfs_dotdot(old_inode, &dir_page); if (!dir_de) goto out_old; } if (new_inode) { struct page *new_page; struct nilfs_dir_entry *new_de; err = -ENOTEMPTY; if (dir_de && !nilfs_empty_dir(new_inode)) goto out_dir; err = -ENOENT; new_de = nilfs_find_entry(new_dir, &new_dentry->d_name, &new_page); if (!new_de) goto out_dir; nilfs_set_link(new_dir, new_de, new_page, old_inode); nilfs_mark_inode_dirty(new_dir); new_inode->i_ctime = CURRENT_TIME; if (dir_de) drop_nlink(new_inode); drop_nlink(new_inode); nilfs_mark_inode_dirty(new_inode); } else { err = nilfs_add_link(new_dentry, old_inode); if (err) goto out_dir; if (dir_de) { inc_nlink(new_dir); nilfs_mark_inode_dirty(new_dir); } } old_inode->i_ctime = CURRENT_TIME; nilfs_delete_entry(old_de, old_page); if (dir_de) { nilfs_set_link(old_inode, dir_de, dir_page, new_dir); drop_nlink(old_dir); } nilfs_mark_inode_dirty(old_dir); nilfs_mark_inode_dirty(old_inode); err = nilfs_transaction_commit(old_dir->i_sb); return err; out_dir: if (dir_de) { kunmap(dir_page); page_cache_release(dir_page); } out_old: kunmap(old_page); page_cache_release(old_page); out: nilfs_transaction_abort(old_dir->i_sb); return err; }