/* * Anybody can rename anything with this: the permission checks are left to the * higher-level routines. */ static int sysv_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 sysv_dir_entry * dir_de = NULL; struct page * old_page; struct sysv_dir_entry * old_de; int err = -ENOENT; old_de = sysv_find_entry(old_dentry, &old_page); if (!old_de) goto out; if (S_ISDIR(old_inode->i_mode)) { err = -EIO; dir_de = sysv_dotdot(old_inode, &dir_page); if (!dir_de) goto out_old; } if (new_inode) { struct page * new_page; struct sysv_dir_entry * new_de; err = -ENOTEMPTY; if (dir_de && !sysv_empty_dir(new_inode)) goto out_dir; err = -ENOENT; new_de = sysv_find_entry(new_dentry, &new_page); if (!new_de) goto out_dir; inc_count(old_inode); sysv_set_link(new_de, new_page, old_inode); new_inode->i_ctime = CURRENT_TIME; if (dir_de) new_inode->i_nlink--; dec_count(new_inode); } else { if (dir_de) { err = -EMLINK; if (new_dir->i_nlink >= new_dir->i_sb->sv_link_max) goto out_dir; } inc_count(old_inode); err = sysv_add_link(new_dentry, old_inode); if (err) { dec_count(old_inode); goto out_dir; } if (dir_de) inc_count(new_dir); } sysv_delete_entry(old_de, old_page); dec_count(old_inode); if (dir_de) { sysv_set_link(dir_de, dir_page, new_dir); dec_count(old_dir); } return 0; out_dir: if (dir_de) { kunmap(dir_page); page_cache_release(dir_page); } out_old: kunmap(old_page); page_cache_release(old_page); out: return err; }
/* * Anybody can rename anything with this: the permission checks are left to the * higher-level routines. */ static int sysv_rename(struct inode * old_dir, struct dentry * old_dentry, struct inode * new_dir, struct dentry * new_dentry) { struct inode * old_inode = d_inode(old_dentry); struct inode * new_inode = d_inode(new_dentry); struct page * dir_page = NULL; struct sysv_dir_entry * dir_de = NULL; struct page * old_page; struct sysv_dir_entry * old_de; int err = -ENOENT; old_de = sysv_find_entry(old_dentry, &old_page); if (!old_de) goto out; if (S_ISDIR(old_inode->i_mode)) { err = -EIO; dir_de = sysv_dotdot(old_inode, &dir_page); if (!dir_de) goto out_old; } if (new_inode) { struct page * new_page; struct sysv_dir_entry * new_de; err = -ENOTEMPTY; if (dir_de && !sysv_empty_dir(new_inode)) goto out_dir; err = -ENOENT; new_de = sysv_find_entry(new_dentry, &new_page); if (!new_de) goto out_dir; sysv_set_link(new_de, new_page, old_inode); new_inode->i_ctime = CURRENT_TIME_SEC; if (dir_de) drop_nlink(new_inode); inode_dec_link_count(new_inode); } else { err = sysv_add_link(new_dentry, old_inode); if (err) goto out_dir; if (dir_de) inode_inc_link_count(new_dir); } sysv_delete_entry(old_de, old_page); mark_inode_dirty(old_inode); if (dir_de) { sysv_set_link(dir_de, dir_page, new_dir); inode_dec_link_count(old_dir); } return 0; out_dir: if (dir_de) { kunmap(dir_page); put_page(dir_page); } out_old: kunmap(old_page); put_page(old_page); out: return err; }