static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode, struct page *page) { struct dnode_of_data dn; struct node_info ni; unsigned int start, end; int err = 0, recovered = 0; /* step 1: recover xattr */ if (IS_INODE(page)) { f2fs_recover_inline_xattr(inode, page); } else if (f2fs_has_xattr_block(ofs_of_node(page))) { err = f2fs_recover_xattr_data(inode, page); if (!err) recovered++; goto out; } /* step 2: recover inline data */ if (f2fs_recover_inline_data(inode, page)) goto out; /* step 3: recover data indices */ start = f2fs_start_bidx_of_node(ofs_of_node(page), inode); end = start + ADDRS_PER_PAGE(page, inode); set_new_dnode(&dn, inode, NULL, NULL, 0); retry_dn: err = f2fs_get_dnode_of_data(&dn, start, ALLOC_NODE); if (err) { if (err == -ENOMEM) { congestion_wait(BLK_RW_ASYNC, HZ/50); goto retry_dn; } goto out; } f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true); err = f2fs_get_node_info(sbi, dn.nid, &ni); if (err) goto err; f2fs_bug_on(sbi, ni.ino != ino_of_node(page)); if (ofs_of_node(dn.node_page) != ofs_of_node(page)) { f2fs_msg(sbi->sb, KERN_WARNING, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u", inode->i_ino, ofs_of_node(dn.node_page), ofs_of_node(page)); err = -EFAULT; goto err; } for (; start < end; start++, dn.ofs_in_node++) { block_t src, dest; src = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node); dest = datablock_addr(dn.inode, page, dn.ofs_in_node); if (__is_valid_data_blkaddr(src) && !f2fs_is_valid_blkaddr(sbi, src, META_POR)) { err = -EFAULT; goto err; } if (__is_valid_data_blkaddr(dest) && !f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { err = -EFAULT; goto err; } /* skip recovering if dest is the same as src */ if (src == dest) continue; /* dest is invalid, just invalidate src block */ if (dest == NULL_ADDR) { f2fs_truncate_data_blocks_range(&dn, 1); continue; } if (!file_keep_isize(inode) && (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT))) f2fs_i_size_write(inode, (loff_t)(start + 1) << PAGE_SHIFT); /* * dest is reserved block, invalidate src block * and then reserve one new block in dnode page. */ if (dest == NEW_ADDR) { f2fs_truncate_data_blocks_range(&dn, 1); f2fs_reserve_new_block(&dn); continue; } /* dest is valid block, try to recover from src to dest */ if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { if (src == NULL_ADDR) { err = f2fs_reserve_new_block(&dn); while (err && IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) err = f2fs_reserve_new_block(&dn); /* We should not get -ENOSPC */ f2fs_bug_on(sbi, err); if (err) goto err; } retry_prev: /* Check the previous node page having this index */ err = check_index_in_prev_nodes(sbi, dest, &dn); if (err) { if (err == -ENOMEM) { congestion_wait(BLK_RW_ASYNC, HZ/50); goto retry_prev; } goto err; } /* write dummy data page */ f2fs_replace_block(sbi, &dn, src, dest, ni.version, false, false); recovered++; } } copy_node_footer(dn.node_page, page); fill_node_footer(dn.node_page, dn.nid, ni.ino, ofs_of_node(page), false); set_page_dirty(dn.node_page); err: f2fs_put_dnode(&dn); out: f2fs_msg(sbi->sb, KERN_NOTICE, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d", inode->i_ino, file_keep_isize(inode) ? "keep" : "recover", recovered, err); return err; }
static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); pgoff_t pg_start, pg_end, delta, nrpages, idx; loff_t new_size; int ret; if (!S_ISREG(inode->i_mode)) return -EINVAL; new_size = i_size_read(inode) + len; if (new_size > inode->i_sb->s_maxbytes) return -EFBIG; if (offset >= i_size_read(inode)) return -EINVAL; /* insert range should be aligned to block size of f2fs. */ if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) return -EINVAL; f2fs_balance_fs(sbi); if (f2fs_has_inline_data(inode)) { ret = f2fs_convert_inline_inode(inode); if (ret) return ret; } ret = truncate_blocks(inode, i_size_read(inode), true); if (ret) return ret; /* write out all dirty pages from offset */ ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); if (ret) return ret; truncate_pagecache(inode, 0, offset); pg_start = offset >> PAGE_CACHE_SHIFT; pg_end = (offset + len) >> PAGE_CACHE_SHIFT; delta = pg_end - pg_start; nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; for (idx = nrpages - 1; idx >= pg_start && idx != -1; idx--) { struct dnode_of_data dn; struct page *ipage; block_t new_addr, old_addr; f2fs_lock_op(sbi); set_new_dnode(&dn, inode, NULL, NULL, 0); ret = get_dnode_of_data(&dn, idx, LOOKUP_NODE_RA); if (ret && ret != -ENOENT) { goto out; } else if (ret == -ENOENT) { goto next; } else if (dn.data_blkaddr == NULL_ADDR) { f2fs_put_dnode(&dn); goto next; } else { new_addr = dn.data_blkaddr; truncate_data_blocks_range(&dn, 1); f2fs_put_dnode(&dn); } ipage = get_node_page(sbi, inode->i_ino); if (IS_ERR(ipage)) { ret = PTR_ERR(ipage); goto out; } set_new_dnode(&dn, inode, ipage, NULL, 0); ret = f2fs_reserve_block(&dn, idx + delta); if (ret) goto out; old_addr = dn.data_blkaddr; f2fs_bug_on(sbi, old_addr != NEW_ADDR); if (new_addr != NEW_ADDR) { struct node_info ni; get_node_info(sbi, dn.nid, &ni); f2fs_replace_block(sbi, &dn, old_addr, new_addr, ni.version, true); } f2fs_put_dnode(&dn); next: f2fs_unlock_op(sbi); } i_size_write(inode, new_size); return 0; out: f2fs_unlock_op(sbi); return ret; }
static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct dnode_of_data dn; pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; int ret = 0; for (; end < nrpages; start++, end++) { block_t new_addr, old_addr; f2fs_lock_op(sbi); set_new_dnode(&dn, inode, NULL, NULL, 0); ret = get_dnode_of_data(&dn, end, LOOKUP_NODE_RA); if (ret && ret != -ENOENT) { goto out; } else if (ret == -ENOENT) { new_addr = NULL_ADDR; } else { new_addr = dn.data_blkaddr; truncate_data_blocks_range(&dn, 1); f2fs_put_dnode(&dn); } if (new_addr == NULL_ADDR) { set_new_dnode(&dn, inode, NULL, NULL, 0); ret = get_dnode_of_data(&dn, start, LOOKUP_NODE_RA); if (ret && ret != -ENOENT) { goto out; } else if (ret == -ENOENT) { f2fs_unlock_op(sbi); continue; } if (dn.data_blkaddr == NULL_ADDR) { f2fs_put_dnode(&dn); f2fs_unlock_op(sbi); continue; } else { truncate_data_blocks_range(&dn, 1); } f2fs_put_dnode(&dn); } else { struct page *ipage; ipage = get_node_page(sbi, inode->i_ino); if (IS_ERR(ipage)) { ret = PTR_ERR(ipage); goto out; } set_new_dnode(&dn, inode, ipage, NULL, 0); ret = f2fs_reserve_block(&dn, start); if (ret) goto out; old_addr = dn.data_blkaddr; if (old_addr != NEW_ADDR && new_addr == NEW_ADDR) { dn.data_blkaddr = NULL_ADDR; f2fs_update_extent_cache(&dn); invalidate_blocks(sbi, old_addr); dn.data_blkaddr = new_addr; set_data_blkaddr(&dn); } else if (new_addr != NEW_ADDR) { struct node_info ni; get_node_info(sbi, dn.nid, &ni); f2fs_replace_block(sbi, &dn, old_addr, new_addr, ni.version, true); } f2fs_put_dnode(&dn); } f2fs_unlock_op(sbi); } return 0; out: f2fs_unlock_op(sbi); return ret; }
static int __exchange_data_block(struct inode *inode, pgoff_t src, pgoff_t dst, bool full) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct dnode_of_data dn; block_t new_addr; bool do_replace = false; int ret; set_new_dnode(&dn, inode, NULL, NULL, 0); ret = get_dnode_of_data(&dn, src, LOOKUP_NODE_RA); if (ret && ret != -ENOENT) { return ret; } else if (ret == -ENOENT) { new_addr = NULL_ADDR; } else { new_addr = dn.data_blkaddr; if (!is_checkpointed_data(sbi, new_addr)) { dn.data_blkaddr = NULL_ADDR; /* do not invalidate this block address */ set_data_blkaddr(&dn); f2fs_update_extent_cache(&dn); do_replace = true; } f2fs_put_dnode(&dn); } if (new_addr == NULL_ADDR) return full ? truncate_hole(inode, dst, dst + 1) : 0; if (do_replace) { struct page *ipage = get_node_page(sbi, inode->i_ino); struct node_info ni; if (IS_ERR(ipage)) { ret = PTR_ERR(ipage); goto err_out; } set_new_dnode(&dn, inode, ipage, NULL, 0); ret = f2fs_reserve_block(&dn, dst); if (ret) goto err_out; truncate_data_blocks_range(&dn, 1); get_node_info(sbi, dn.nid, &ni); f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr, ni.version, true); f2fs_put_dnode(&dn); } else { struct page *psrc, *pdst; psrc = get_lock_data_page(inode, src, true); if (IS_ERR(psrc)) return PTR_ERR(psrc); pdst = get_new_data_page(inode, NULL, dst, false); if (IS_ERR(pdst)) { f2fs_put_page(psrc, 1); return PTR_ERR(pdst); } f2fs_copy_page(psrc, pdst); set_page_dirty(pdst); f2fs_put_page(pdst, 1); f2fs_put_page(psrc, 1); return truncate_hole(inode, src, src + 1); } return 0; err_out: if (!get_dnode_of_data(&dn, src, LOOKUP_NODE)) { dn.data_blkaddr = new_addr; set_data_blkaddr(&dn); f2fs_update_extent_cache(&dn); f2fs_put_dnode(&dn); } return ret; }