5209 lines
122 KiB
C
5209 lines
122 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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*
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* Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
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*
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*/
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#include <linux/blkdev.h>
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#include <linux/fs.h>
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#include <linux/random.h>
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#include <linux/slab.h>
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#include "debug.h"
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#include "ntfs.h"
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#include "ntfs_fs.h"
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/*
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* LOG FILE structs
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*/
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// clang-format off
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#define MaxLogFileSize 0x100000000ull
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#define DefaultLogPageSize 4096
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#define MinLogRecordPages 0x30
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struct RESTART_HDR {
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struct NTFS_RECORD_HEADER rhdr; // 'RSTR'
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__le32 sys_page_size; // 0x10: Page size of the system which initialized the log.
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__le32 page_size; // 0x14: Log page size used for this log file.
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__le16 ra_off; // 0x18:
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__le16 minor_ver; // 0x1A:
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__le16 major_ver; // 0x1C:
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__le16 fixups[];
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};
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#define LFS_NO_CLIENT 0xffff
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#define LFS_NO_CLIENT_LE cpu_to_le16(0xffff)
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struct CLIENT_REC {
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__le64 oldest_lsn;
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__le64 restart_lsn; // 0x08:
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__le16 prev_client; // 0x10:
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__le16 next_client; // 0x12:
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__le16 seq_num; // 0x14:
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u8 align[6]; // 0x16:
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__le32 name_bytes; // 0x1C: In bytes.
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__le16 name[32]; // 0x20: Name of client.
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};
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static_assert(sizeof(struct CLIENT_REC) == 0x60);
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/* Two copies of these will exist at the beginning of the log file */
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struct RESTART_AREA {
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__le64 current_lsn; // 0x00: Current logical end of log file.
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__le16 log_clients; // 0x08: Maximum number of clients.
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__le16 client_idx[2]; // 0x0A: Free/use index into the client record arrays.
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__le16 flags; // 0x0E: See RESTART_SINGLE_PAGE_IO.
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__le32 seq_num_bits; // 0x10: The number of bits in sequence number.
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__le16 ra_len; // 0x14:
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__le16 client_off; // 0x16:
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__le64 l_size; // 0x18: Usable log file size.
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__le32 last_lsn_data_len; // 0x20:
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__le16 rec_hdr_len; // 0x24: Log page data offset.
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__le16 data_off; // 0x26: Log page data length.
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__le32 open_log_count; // 0x28:
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__le32 align[5]; // 0x2C:
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struct CLIENT_REC clients[]; // 0x40:
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};
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struct LOG_REC_HDR {
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__le16 redo_op; // 0x00: NTFS_LOG_OPERATION
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__le16 undo_op; // 0x02: NTFS_LOG_OPERATION
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__le16 redo_off; // 0x04: Offset to Redo record.
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__le16 redo_len; // 0x06: Redo length.
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__le16 undo_off; // 0x08: Offset to Undo record.
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__le16 undo_len; // 0x0A: Undo length.
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__le16 target_attr; // 0x0C:
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__le16 lcns_follow; // 0x0E:
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__le16 record_off; // 0x10:
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__le16 attr_off; // 0x12:
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__le16 cluster_off; // 0x14:
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__le16 reserved; // 0x16:
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__le64 target_vcn; // 0x18:
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__le64 page_lcns[]; // 0x20:
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};
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static_assert(sizeof(struct LOG_REC_HDR) == 0x20);
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#define RESTART_ENTRY_ALLOCATED 0xFFFFFFFF
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#define RESTART_ENTRY_ALLOCATED_LE cpu_to_le32(0xFFFFFFFF)
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struct RESTART_TABLE {
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__le16 size; // 0x00: In bytes
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__le16 used; // 0x02: Entries
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__le16 total; // 0x04: Entries
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__le16 res[3]; // 0x06:
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__le32 free_goal; // 0x0C:
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__le32 first_free; // 0x10:
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__le32 last_free; // 0x14:
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};
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static_assert(sizeof(struct RESTART_TABLE) == 0x18);
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struct ATTR_NAME_ENTRY {
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__le16 off; // Offset in the Open attribute Table.
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__le16 name_bytes;
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__le16 name[];
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};
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struct OPEN_ATTR_ENRTY {
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__le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated
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__le32 bytes_per_index; // 0x04:
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enum ATTR_TYPE type; // 0x08:
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u8 is_dirty_pages; // 0x0C:
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u8 is_attr_name; // 0x0B: Faked field to manage 'ptr'
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u8 name_len; // 0x0C: Faked field to manage 'ptr'
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u8 res;
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struct MFT_REF ref; // 0x10: File Reference of file containing attribute
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__le64 open_record_lsn; // 0x18:
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void *ptr; // 0x20:
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};
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/* 32 bit version of 'struct OPEN_ATTR_ENRTY' */
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struct OPEN_ATTR_ENRTY_32 {
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__le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated
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__le32 ptr; // 0x04:
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struct MFT_REF ref; // 0x08:
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__le64 open_record_lsn; // 0x10:
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u8 is_dirty_pages; // 0x18:
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u8 is_attr_name; // 0x19:
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u8 res1[2];
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enum ATTR_TYPE type; // 0x1C:
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u8 name_len; // 0x20: In wchar
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u8 res2[3];
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__le32 AttributeName; // 0x24:
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__le32 bytes_per_index; // 0x28:
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};
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#define SIZEOF_OPENATTRIBUTEENTRY0 0x2c
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// static_assert( 0x2C == sizeof(struct OPEN_ATTR_ENRTY_32) );
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static_assert(sizeof(struct OPEN_ATTR_ENRTY) < SIZEOF_OPENATTRIBUTEENTRY0);
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/*
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* One entry exists in the Dirty Pages Table for each page which is dirty at
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* the time the Restart Area is written.
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*/
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struct DIR_PAGE_ENTRY {
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__le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated
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__le32 target_attr; // 0x04: Index into the Open attribute Table
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__le32 transfer_len; // 0x08:
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__le32 lcns_follow; // 0x0C:
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__le64 vcn; // 0x10: Vcn of dirty page
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__le64 oldest_lsn; // 0x18:
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__le64 page_lcns[]; // 0x20:
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};
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static_assert(sizeof(struct DIR_PAGE_ENTRY) == 0x20);
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/* 32 bit version of 'struct DIR_PAGE_ENTRY' */
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struct DIR_PAGE_ENTRY_32 {
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__le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated
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__le32 target_attr; // 0x04: Index into the Open attribute Table
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__le32 transfer_len; // 0x08:
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__le32 lcns_follow; // 0x0C:
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__le32 reserved; // 0x10:
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__le32 vcn_low; // 0x14: Vcn of dirty page
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__le32 vcn_hi; // 0x18: Vcn of dirty page
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__le32 oldest_lsn_low; // 0x1C:
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__le32 oldest_lsn_hi; // 0x1C:
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__le32 page_lcns_low; // 0x24:
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__le32 page_lcns_hi; // 0x24:
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};
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static_assert(offsetof(struct DIR_PAGE_ENTRY_32, vcn_low) == 0x14);
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static_assert(sizeof(struct DIR_PAGE_ENTRY_32) == 0x2c);
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enum transact_state {
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TransactionUninitialized = 0,
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TransactionActive,
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TransactionPrepared,
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TransactionCommitted
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};
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struct TRANSACTION_ENTRY {
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__le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated
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u8 transact_state; // 0x04:
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u8 reserved[3]; // 0x05:
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__le64 first_lsn; // 0x08:
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__le64 prev_lsn; // 0x10:
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__le64 undo_next_lsn; // 0x18:
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__le32 undo_records; // 0x20: Number of undo log records pending abort
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__le32 undo_len; // 0x24: Total undo size
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};
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static_assert(sizeof(struct TRANSACTION_ENTRY) == 0x28);
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struct NTFS_RESTART {
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__le32 major_ver; // 0x00:
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__le32 minor_ver; // 0x04:
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__le64 check_point_start; // 0x08:
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__le64 open_attr_table_lsn; // 0x10:
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__le64 attr_names_lsn; // 0x18:
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__le64 dirty_pages_table_lsn; // 0x20:
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__le64 transact_table_lsn; // 0x28:
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__le32 open_attr_len; // 0x30: In bytes
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__le32 attr_names_len; // 0x34: In bytes
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__le32 dirty_pages_len; // 0x38: In bytes
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__le32 transact_table_len; // 0x3C: In bytes
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};
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static_assert(sizeof(struct NTFS_RESTART) == 0x40);
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struct NEW_ATTRIBUTE_SIZES {
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__le64 alloc_size;
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__le64 valid_size;
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__le64 data_size;
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__le64 total_size;
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};
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struct BITMAP_RANGE {
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__le32 bitmap_off;
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__le32 bits;
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};
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struct LCN_RANGE {
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__le64 lcn;
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__le64 len;
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};
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/* The following type defines the different log record types. */
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#define LfsClientRecord cpu_to_le32(1)
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#define LfsClientRestart cpu_to_le32(2)
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/* This is used to uniquely identify a client for a particular log file. */
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struct CLIENT_ID {
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__le16 seq_num;
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__le16 client_idx;
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};
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/* This is the header that begins every Log Record in the log file. */
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struct LFS_RECORD_HDR {
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__le64 this_lsn; // 0x00:
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__le64 client_prev_lsn; // 0x08:
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__le64 client_undo_next_lsn; // 0x10:
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__le32 client_data_len; // 0x18:
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struct CLIENT_ID client; // 0x1C: Owner of this log record.
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__le32 record_type; // 0x20: LfsClientRecord or LfsClientRestart.
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__le32 transact_id; // 0x24:
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__le16 flags; // 0x28: LOG_RECORD_MULTI_PAGE
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u8 align[6]; // 0x2A:
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};
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#define LOG_RECORD_MULTI_PAGE cpu_to_le16(1)
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static_assert(sizeof(struct LFS_RECORD_HDR) == 0x30);
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struct LFS_RECORD {
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__le16 next_record_off; // 0x00: Offset of the free space in the page,
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u8 align[6]; // 0x02:
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__le64 last_end_lsn; // 0x08: lsn for the last log record which ends on the page,
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};
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static_assert(sizeof(struct LFS_RECORD) == 0x10);
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struct RECORD_PAGE_HDR {
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struct NTFS_RECORD_HEADER rhdr; // 'RCRD'
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__le32 rflags; // 0x10: See LOG_PAGE_LOG_RECORD_END
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__le16 page_count; // 0x14:
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__le16 page_pos; // 0x16:
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struct LFS_RECORD record_hdr; // 0x18:
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__le16 fixups[10]; // 0x28:
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__le32 file_off; // 0x3c: Used when major version >= 2
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};
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// clang-format on
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// Page contains the end of a log record.
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#define LOG_PAGE_LOG_RECORD_END cpu_to_le32(0x00000001)
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static inline bool is_log_record_end(const struct RECORD_PAGE_HDR *hdr)
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{
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return hdr->rflags & LOG_PAGE_LOG_RECORD_END;
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}
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static_assert(offsetof(struct RECORD_PAGE_HDR, file_off) == 0x3c);
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/*
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* END of NTFS LOG structures
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*/
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/* Define some tuning parameters to keep the restart tables a reasonable size. */
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#define INITIAL_NUMBER_TRANSACTIONS 5
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enum NTFS_LOG_OPERATION {
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Noop = 0x00,
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CompensationLogRecord = 0x01,
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InitializeFileRecordSegment = 0x02,
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DeallocateFileRecordSegment = 0x03,
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WriteEndOfFileRecordSegment = 0x04,
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CreateAttribute = 0x05,
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DeleteAttribute = 0x06,
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UpdateResidentValue = 0x07,
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UpdateNonresidentValue = 0x08,
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UpdateMappingPairs = 0x09,
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DeleteDirtyClusters = 0x0A,
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SetNewAttributeSizes = 0x0B,
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AddIndexEntryRoot = 0x0C,
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DeleteIndexEntryRoot = 0x0D,
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AddIndexEntryAllocation = 0x0E,
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DeleteIndexEntryAllocation = 0x0F,
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WriteEndOfIndexBuffer = 0x10,
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SetIndexEntryVcnRoot = 0x11,
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SetIndexEntryVcnAllocation = 0x12,
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UpdateFileNameRoot = 0x13,
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UpdateFileNameAllocation = 0x14,
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SetBitsInNonresidentBitMap = 0x15,
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ClearBitsInNonresidentBitMap = 0x16,
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HotFix = 0x17,
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EndTopLevelAction = 0x18,
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PrepareTransaction = 0x19,
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CommitTransaction = 0x1A,
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ForgetTransaction = 0x1B,
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OpenNonresidentAttribute = 0x1C,
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OpenAttributeTableDump = 0x1D,
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AttributeNamesDump = 0x1E,
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DirtyPageTableDump = 0x1F,
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TransactionTableDump = 0x20,
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UpdateRecordDataRoot = 0x21,
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UpdateRecordDataAllocation = 0x22,
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UpdateRelativeDataInIndex =
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0x23, // NtOfsRestartUpdateRelativeDataInIndex
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UpdateRelativeDataInIndex2 = 0x24,
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ZeroEndOfFileRecord = 0x25,
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};
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/*
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* Array for log records which require a target attribute.
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* A true indicates that the corresponding restart operation
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* requires a target attribute.
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*/
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static const u8 AttributeRequired[] = {
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0xFC, 0xFB, 0xFF, 0x10, 0x06,
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};
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static inline bool is_target_required(u16 op)
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{
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bool ret = op <= UpdateRecordDataAllocation &&
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(AttributeRequired[op >> 3] >> (op & 7) & 1);
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return ret;
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}
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static inline bool can_skip_action(enum NTFS_LOG_OPERATION op)
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{
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switch (op) {
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case Noop:
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case DeleteDirtyClusters:
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case HotFix:
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case EndTopLevelAction:
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case PrepareTransaction:
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case CommitTransaction:
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case ForgetTransaction:
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case CompensationLogRecord:
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case OpenNonresidentAttribute:
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case OpenAttributeTableDump:
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case AttributeNamesDump:
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case DirtyPageTableDump:
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case TransactionTableDump:
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return true;
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default:
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return false;
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}
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}
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enum { lcb_ctx_undo_next, lcb_ctx_prev, lcb_ctx_next };
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/* Bytes per restart table. */
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static inline u32 bytes_per_rt(const struct RESTART_TABLE *rt)
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{
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return le16_to_cpu(rt->used) * le16_to_cpu(rt->size) +
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sizeof(struct RESTART_TABLE);
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}
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/* Log record length. */
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static inline u32 lrh_length(const struct LOG_REC_HDR *lr)
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{
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u16 t16 = le16_to_cpu(lr->lcns_follow);
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return struct_size(lr, page_lcns, max_t(u16, 1, t16));
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}
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struct lcb {
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struct LFS_RECORD_HDR *lrh; // Log record header of the current lsn.
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struct LOG_REC_HDR *log_rec;
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u32 ctx_mode; // lcb_ctx_undo_next/lcb_ctx_prev/lcb_ctx_next
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struct CLIENT_ID client;
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bool alloc; // If true the we should deallocate 'log_rec'.
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||
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};
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|
static void lcb_put(struct lcb *lcb)
|
||
|
{
|
||
|
if (lcb->alloc)
|
||
|
kfree(lcb->log_rec);
|
||
|
kfree(lcb->lrh);
|
||
|
kfree(lcb);
|
||
|
}
|
||
|
|
||
|
/* Find the oldest lsn from active clients. */
|
||
|
static inline void oldest_client_lsn(const struct CLIENT_REC *ca,
|
||
|
__le16 next_client, u64 *oldest_lsn)
|
||
|
{
|
||
|
while (next_client != LFS_NO_CLIENT_LE) {
|
||
|
const struct CLIENT_REC *cr = ca + le16_to_cpu(next_client);
|
||
|
u64 lsn = le64_to_cpu(cr->oldest_lsn);
|
||
|
|
||
|
/* Ignore this block if it's oldest lsn is 0. */
|
||
|
if (lsn && lsn < *oldest_lsn)
|
||
|
*oldest_lsn = lsn;
|
||
|
|
||
|
next_client = cr->next_client;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static inline bool is_rst_page_hdr_valid(u32 file_off,
|
||
|
const struct RESTART_HDR *rhdr)
|
||
|
{
|
||
|
u32 sys_page = le32_to_cpu(rhdr->sys_page_size);
|
||
|
u32 page_size = le32_to_cpu(rhdr->page_size);
|
||
|
u32 end_usa;
|
||
|
u16 ro;
|
||
|
|
||
|
if (sys_page < SECTOR_SIZE || page_size < SECTOR_SIZE ||
|
||
|
sys_page & (sys_page - 1) || page_size & (page_size - 1)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
/* Check that if the file offset isn't 0, it is the system page size. */
|
||
|
if (file_off && file_off != sys_page)
|
||
|
return false;
|
||
|
|
||
|
/* Check support version 1.1+. */
|
||
|
if (le16_to_cpu(rhdr->major_ver) <= 1 && !rhdr->minor_ver)
|
||
|
return false;
|
||
|
|
||
|
if (le16_to_cpu(rhdr->major_ver) > 2)
|
||
|
return false;
|
||
|
|
||
|
ro = le16_to_cpu(rhdr->ra_off);
|
||
|
if (!IS_ALIGNED(ro, 8) || ro > sys_page)
|
||
|
return false;
|
||
|
|
||
|
end_usa = ((sys_page >> SECTOR_SHIFT) + 1) * sizeof(short);
|
||
|
end_usa += le16_to_cpu(rhdr->rhdr.fix_off);
|
||
|
|
||
|
if (ro < end_usa)
|
||
|
return false;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static inline bool is_rst_area_valid(const struct RESTART_HDR *rhdr)
|
||
|
{
|
||
|
const struct RESTART_AREA *ra;
|
||
|
u16 cl, fl, ul;
|
||
|
u32 off, l_size, file_dat_bits, file_size_round;
|
||
|
u16 ro = le16_to_cpu(rhdr->ra_off);
|
||
|
u32 sys_page = le32_to_cpu(rhdr->sys_page_size);
|
||
|
|
||
|
if (ro + offsetof(struct RESTART_AREA, l_size) >
|
||
|
SECTOR_SIZE - sizeof(short))
|
||
|
return false;
|
||
|
|
||
|
ra = Add2Ptr(rhdr, ro);
|
||
|
cl = le16_to_cpu(ra->log_clients);
|
||
|
|
||
|
if (cl > 1)
|
||
|
return false;
|
||
|
|
||
|
off = le16_to_cpu(ra->client_off);
|
||
|
|
||
|
if (!IS_ALIGNED(off, 8) || ro + off > SECTOR_SIZE - sizeof(short))
|
||
|
return false;
|
||
|
|
||
|
off += cl * sizeof(struct CLIENT_REC);
|
||
|
|
||
|
if (off > sys_page)
|
||
|
return false;
|
||
|
|
||
|
/*
|
||
|
* Check the restart length field and whether the entire
|
||
|
* restart area is contained that length.
|
||
|
*/
|
||
|
if (le16_to_cpu(rhdr->ra_off) + le16_to_cpu(ra->ra_len) > sys_page ||
|
||
|
off > le16_to_cpu(ra->ra_len)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* As a final check make sure that the use list and the free list
|
||
|
* are either empty or point to a valid client.
|
||
|
*/
|
||
|
fl = le16_to_cpu(ra->client_idx[0]);
|
||
|
ul = le16_to_cpu(ra->client_idx[1]);
|
||
|
if ((fl != LFS_NO_CLIENT && fl >= cl) ||
|
||
|
(ul != LFS_NO_CLIENT && ul >= cl))
|
||
|
return false;
|
||
|
|
||
|
/* Make sure the sequence number bits match the log file size. */
|
||
|
l_size = le64_to_cpu(ra->l_size);
|
||
|
|
||
|
file_dat_bits = sizeof(u64) * 8 - le32_to_cpu(ra->seq_num_bits);
|
||
|
file_size_round = 1u << (file_dat_bits + 3);
|
||
|
if (file_size_round != l_size &&
|
||
|
(file_size_round < l_size || (file_size_round / 2) > l_size)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
/* The log page data offset and record header length must be quad-aligned. */
|
||
|
if (!IS_ALIGNED(le16_to_cpu(ra->data_off), 8) ||
|
||
|
!IS_ALIGNED(le16_to_cpu(ra->rec_hdr_len), 8))
|
||
|
return false;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static inline bool is_client_area_valid(const struct RESTART_HDR *rhdr,
|
||
|
bool usa_error)
|
||
|
{
|
||
|
u16 ro = le16_to_cpu(rhdr->ra_off);
|
||
|
const struct RESTART_AREA *ra = Add2Ptr(rhdr, ro);
|
||
|
u16 ra_len = le16_to_cpu(ra->ra_len);
|
||
|
const struct CLIENT_REC *ca;
|
||
|
u32 i;
|
||
|
|
||
|
if (usa_error && ra_len + ro > SECTOR_SIZE - sizeof(short))
|
||
|
return false;
|
||
|
|
||
|
/* Find the start of the client array. */
|
||
|
ca = Add2Ptr(ra, le16_to_cpu(ra->client_off));
|
||
|
|
||
|
/*
|
||
|
* Start with the free list.
|
||
|
* Check that all the clients are valid and that there isn't a cycle.
|
||
|
* Do the in-use list on the second pass.
|
||
|
*/
|
||
|
for (i = 0; i < 2; i++) {
|
||
|
u16 client_idx = le16_to_cpu(ra->client_idx[i]);
|
||
|
bool first_client = true;
|
||
|
u16 clients = le16_to_cpu(ra->log_clients);
|
||
|
|
||
|
while (client_idx != LFS_NO_CLIENT) {
|
||
|
const struct CLIENT_REC *cr;
|
||
|
|
||
|
if (!clients ||
|
||
|
client_idx >= le16_to_cpu(ra->log_clients))
|
||
|
return false;
|
||
|
|
||
|
clients -= 1;
|
||
|
cr = ca + client_idx;
|
||
|
|
||
|
client_idx = le16_to_cpu(cr->next_client);
|
||
|
|
||
|
if (first_client) {
|
||
|
first_client = false;
|
||
|
if (cr->prev_client != LFS_NO_CLIENT_LE)
|
||
|
return false;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* remove_client
|
||
|
*
|
||
|
* Remove a client record from a client record list an restart area.
|
||
|
*/
|
||
|
static inline void remove_client(struct CLIENT_REC *ca,
|
||
|
const struct CLIENT_REC *cr, __le16 *head)
|
||
|
{
|
||
|
if (cr->prev_client == LFS_NO_CLIENT_LE)
|
||
|
*head = cr->next_client;
|
||
|
else
|
||
|
ca[le16_to_cpu(cr->prev_client)].next_client = cr->next_client;
|
||
|
|
||
|
if (cr->next_client != LFS_NO_CLIENT_LE)
|
||
|
ca[le16_to_cpu(cr->next_client)].prev_client = cr->prev_client;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* add_client - Add a client record to the start of a list.
|
||
|
*/
|
||
|
static inline void add_client(struct CLIENT_REC *ca, u16 index, __le16 *head)
|
||
|
{
|
||
|
struct CLIENT_REC *cr = ca + index;
|
||
|
|
||
|
cr->prev_client = LFS_NO_CLIENT_LE;
|
||
|
cr->next_client = *head;
|
||
|
|
||
|
if (*head != LFS_NO_CLIENT_LE)
|
||
|
ca[le16_to_cpu(*head)].prev_client = cpu_to_le16(index);
|
||
|
|
||
|
*head = cpu_to_le16(index);
|
||
|
}
|
||
|
|
||
|
static inline void *enum_rstbl(struct RESTART_TABLE *t, void *c)
|
||
|
{
|
||
|
__le32 *e;
|
||
|
u32 bprt;
|
||
|
u16 rsize = t ? le16_to_cpu(t->size) : 0;
|
||
|
|
||
|
if (!c) {
|
||
|
if (!t || !t->total)
|
||
|
return NULL;
|
||
|
e = Add2Ptr(t, sizeof(struct RESTART_TABLE));
|
||
|
} else {
|
||
|
e = Add2Ptr(c, rsize);
|
||
|
}
|
||
|
|
||
|
/* Loop until we hit the first one allocated, or the end of the list. */
|
||
|
for (bprt = bytes_per_rt(t); PtrOffset(t, e) < bprt;
|
||
|
e = Add2Ptr(e, rsize)) {
|
||
|
if (*e == RESTART_ENTRY_ALLOCATED_LE)
|
||
|
return e;
|
||
|
}
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* find_dp - Search for a @vcn in Dirty Page Table.
|
||
|
*/
|
||
|
static inline struct DIR_PAGE_ENTRY *find_dp(struct RESTART_TABLE *dptbl,
|
||
|
u32 target_attr, u64 vcn)
|
||
|
{
|
||
|
__le32 ta = cpu_to_le32(target_attr);
|
||
|
struct DIR_PAGE_ENTRY *dp = NULL;
|
||
|
|
||
|
while ((dp = enum_rstbl(dptbl, dp))) {
|
||
|
u64 dp_vcn = le64_to_cpu(dp->vcn);
|
||
|
|
||
|
if (dp->target_attr == ta && vcn >= dp_vcn &&
|
||
|
vcn < dp_vcn + le32_to_cpu(dp->lcns_follow)) {
|
||
|
return dp;
|
||
|
}
|
||
|
}
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
static inline u32 norm_file_page(u32 page_size, u32 *l_size, bool use_default)
|
||
|
{
|
||
|
if (use_default)
|
||
|
page_size = DefaultLogPageSize;
|
||
|
|
||
|
/* Round the file size down to a system page boundary. */
|
||
|
*l_size &= ~(page_size - 1);
|
||
|
|
||
|
/* File should contain at least 2 restart pages and MinLogRecordPages pages. */
|
||
|
if (*l_size < (MinLogRecordPages + 2) * page_size)
|
||
|
return 0;
|
||
|
|
||
|
return page_size;
|
||
|
}
|
||
|
|
||
|
static bool check_log_rec(const struct LOG_REC_HDR *lr, u32 bytes, u32 tr,
|
||
|
u32 bytes_per_attr_entry)
|
||
|
{
|
||
|
u16 t16;
|
||
|
|
||
|
if (bytes < sizeof(struct LOG_REC_HDR))
|
||
|
return false;
|
||
|
if (!tr)
|
||
|
return false;
|
||
|
|
||
|
if ((tr - sizeof(struct RESTART_TABLE)) %
|
||
|
sizeof(struct TRANSACTION_ENTRY))
|
||
|
return false;
|
||
|
|
||
|
if (le16_to_cpu(lr->redo_off) & 7)
|
||
|
return false;
|
||
|
|
||
|
if (le16_to_cpu(lr->undo_off) & 7)
|
||
|
return false;
|
||
|
|
||
|
if (lr->target_attr)
|
||
|
goto check_lcns;
|
||
|
|
||
|
if (is_target_required(le16_to_cpu(lr->redo_op)))
|
||
|
return false;
|
||
|
|
||
|
if (is_target_required(le16_to_cpu(lr->undo_op)))
|
||
|
return false;
|
||
|
|
||
|
check_lcns:
|
||
|
if (!lr->lcns_follow)
|
||
|
goto check_length;
|
||
|
|
||
|
t16 = le16_to_cpu(lr->target_attr);
|
||
|
if ((t16 - sizeof(struct RESTART_TABLE)) % bytes_per_attr_entry)
|
||
|
return false;
|
||
|
|
||
|
check_length:
|
||
|
if (bytes < lrh_length(lr))
|
||
|
return false;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static bool check_rstbl(const struct RESTART_TABLE *rt, size_t bytes)
|
||
|
{
|
||
|
u32 ts;
|
||
|
u32 i, off;
|
||
|
u16 rsize = le16_to_cpu(rt->size);
|
||
|
u16 ne = le16_to_cpu(rt->used);
|
||
|
u32 ff = le32_to_cpu(rt->first_free);
|
||
|
u32 lf = le32_to_cpu(rt->last_free);
|
||
|
|
||
|
ts = rsize * ne + sizeof(struct RESTART_TABLE);
|
||
|
|
||
|
if (!rsize || rsize > bytes ||
|
||
|
rsize + sizeof(struct RESTART_TABLE) > bytes || bytes < ts ||
|
||
|
le16_to_cpu(rt->total) > ne || ff > ts || lf > ts ||
|
||
|
(ff && ff < sizeof(struct RESTART_TABLE)) ||
|
||
|
(lf && lf < sizeof(struct RESTART_TABLE))) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Verify each entry is either allocated or points
|
||
|
* to a valid offset the table.
|
||
|
*/
|
||
|
for (i = 0; i < ne; i++) {
|
||
|
off = le32_to_cpu(*(__le32 *)Add2Ptr(
|
||
|
rt, i * rsize + sizeof(struct RESTART_TABLE)));
|
||
|
|
||
|
if (off != RESTART_ENTRY_ALLOCATED && off &&
|
||
|
(off < sizeof(struct RESTART_TABLE) ||
|
||
|
((off - sizeof(struct RESTART_TABLE)) % rsize))) {
|
||
|
return false;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Walk through the list headed by the first entry to make
|
||
|
* sure none of the entries are currently being used.
|
||
|
*/
|
||
|
for (off = ff; off;) {
|
||
|
if (off == RESTART_ENTRY_ALLOCATED)
|
||
|
return false;
|
||
|
|
||
|
off = le32_to_cpu(*(__le32 *)Add2Ptr(rt, off));
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* free_rsttbl_idx - Free a previously allocated index a Restart Table.
|
||
|
*/
|
||
|
static inline void free_rsttbl_idx(struct RESTART_TABLE *rt, u32 off)
|
||
|
{
|
||
|
__le32 *e;
|
||
|
u32 lf = le32_to_cpu(rt->last_free);
|
||
|
__le32 off_le = cpu_to_le32(off);
|
||
|
|
||
|
e = Add2Ptr(rt, off);
|
||
|
|
||
|
if (off < le32_to_cpu(rt->free_goal)) {
|
||
|
*e = rt->first_free;
|
||
|
rt->first_free = off_le;
|
||
|
if (!lf)
|
||
|
rt->last_free = off_le;
|
||
|
} else {
|
||
|
if (lf)
|
||
|
*(__le32 *)Add2Ptr(rt, lf) = off_le;
|
||
|
else
|
||
|
rt->first_free = off_le;
|
||
|
|
||
|
rt->last_free = off_le;
|
||
|
*e = 0;
|
||
|
}
|
||
|
|
||
|
le16_sub_cpu(&rt->total, 1);
|
||
|
}
|
||
|
|
||
|
static inline struct RESTART_TABLE *init_rsttbl(u16 esize, u16 used)
|
||
|
{
|
||
|
__le32 *e, *last_free;
|
||
|
u32 off;
|
||
|
u32 bytes = esize * used + sizeof(struct RESTART_TABLE);
|
||
|
u32 lf = sizeof(struct RESTART_TABLE) + (used - 1) * esize;
|
||
|
struct RESTART_TABLE *t = kzalloc(bytes, GFP_NOFS);
|
||
|
|
||
|
if (!t)
|
||
|
return NULL;
|
||
|
|
||
|
t->size = cpu_to_le16(esize);
|
||
|
t->used = cpu_to_le16(used);
|
||
|
t->free_goal = cpu_to_le32(~0u);
|
||
|
t->first_free = cpu_to_le32(sizeof(struct RESTART_TABLE));
|
||
|
t->last_free = cpu_to_le32(lf);
|
||
|
|
||
|
e = (__le32 *)(t + 1);
|
||
|
last_free = Add2Ptr(t, lf);
|
||
|
|
||
|
for (off = sizeof(struct RESTART_TABLE) + esize; e < last_free;
|
||
|
e = Add2Ptr(e, esize), off += esize) {
|
||
|
*e = cpu_to_le32(off);
|
||
|
}
|
||
|
return t;
|
||
|
}
|
||
|
|
||
|
static inline struct RESTART_TABLE *extend_rsttbl(struct RESTART_TABLE *tbl,
|
||
|
u32 add, u32 free_goal)
|
||
|
{
|
||
|
u16 esize = le16_to_cpu(tbl->size);
|
||
|
__le32 osize = cpu_to_le32(bytes_per_rt(tbl));
|
||
|
u32 used = le16_to_cpu(tbl->used);
|
||
|
struct RESTART_TABLE *rt;
|
||
|
|
||
|
rt = init_rsttbl(esize, used + add);
|
||
|
if (!rt)
|
||
|
return NULL;
|
||
|
|
||
|
memcpy(rt + 1, tbl + 1, esize * used);
|
||
|
|
||
|
rt->free_goal = free_goal == ~0u
|
||
|
? cpu_to_le32(~0u)
|
||
|
: cpu_to_le32(sizeof(struct RESTART_TABLE) +
|
||
|
free_goal * esize);
|
||
|
|
||
|
if (tbl->first_free) {
|
||
|
rt->first_free = tbl->first_free;
|
||
|
*(__le32 *)Add2Ptr(rt, le32_to_cpu(tbl->last_free)) = osize;
|
||
|
} else {
|
||
|
rt->first_free = osize;
|
||
|
}
|
||
|
|
||
|
rt->total = tbl->total;
|
||
|
|
||
|
kfree(tbl);
|
||
|
return rt;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* alloc_rsttbl_idx
|
||
|
*
|
||
|
* Allocate an index from within a previously initialized Restart Table.
|
||
|
*/
|
||
|
static inline void *alloc_rsttbl_idx(struct RESTART_TABLE **tbl)
|
||
|
{
|
||
|
u32 off;
|
||
|
__le32 *e;
|
||
|
struct RESTART_TABLE *t = *tbl;
|
||
|
|
||
|
if (!t->first_free) {
|
||
|
*tbl = t = extend_rsttbl(t, 16, ~0u);
|
||
|
if (!t)
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
off = le32_to_cpu(t->first_free);
|
||
|
|
||
|
/* Dequeue this entry and zero it. */
|
||
|
e = Add2Ptr(t, off);
|
||
|
|
||
|
t->first_free = *e;
|
||
|
|
||
|
memset(e, 0, le16_to_cpu(t->size));
|
||
|
|
||
|
*e = RESTART_ENTRY_ALLOCATED_LE;
|
||
|
|
||
|
/* If list is going empty, then we fix the last_free as well. */
|
||
|
if (!t->first_free)
|
||
|
t->last_free = 0;
|
||
|
|
||
|
le16_add_cpu(&t->total, 1);
|
||
|
|
||
|
return Add2Ptr(t, off);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* alloc_rsttbl_from_idx
|
||
|
*
|
||
|
* Allocate a specific index from within a previously initialized Restart Table.
|
||
|
*/
|
||
|
static inline void *alloc_rsttbl_from_idx(struct RESTART_TABLE **tbl, u32 vbo)
|
||
|
{
|
||
|
u32 off;
|
||
|
__le32 *e;
|
||
|
struct RESTART_TABLE *rt = *tbl;
|
||
|
u32 bytes = bytes_per_rt(rt);
|
||
|
u16 esize = le16_to_cpu(rt->size);
|
||
|
|
||
|
/* If the entry is not the table, we will have to extend the table. */
|
||
|
if (vbo >= bytes) {
|
||
|
/*
|
||
|
* Extend the size by computing the number of entries between
|
||
|
* the existing size and the desired index and adding 1 to that.
|
||
|
*/
|
||
|
u32 bytes2idx = vbo - bytes;
|
||
|
|
||
|
/*
|
||
|
* There should always be an integral number of entries
|
||
|
* being added. Now extend the table.
|
||
|
*/
|
||
|
*tbl = rt = extend_rsttbl(rt, bytes2idx / esize + 1, bytes);
|
||
|
if (!rt)
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
/* See if the entry is already allocated, and just return if it is. */
|
||
|
e = Add2Ptr(rt, vbo);
|
||
|
|
||
|
if (*e == RESTART_ENTRY_ALLOCATED_LE)
|
||
|
return e;
|
||
|
|
||
|
/*
|
||
|
* Walk through the table, looking for the entry we're
|
||
|
* interested and the previous entry.
|
||
|
*/
|
||
|
off = le32_to_cpu(rt->first_free);
|
||
|
e = Add2Ptr(rt, off);
|
||
|
|
||
|
if (off == vbo) {
|
||
|
/* this is a match */
|
||
|
rt->first_free = *e;
|
||
|
goto skip_looking;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Need to walk through the list looking for the predecessor
|
||
|
* of our entry.
|
||
|
*/
|
||
|
for (;;) {
|
||
|
/* Remember the entry just found */
|
||
|
u32 last_off = off;
|
||
|
__le32 *last_e = e;
|
||
|
|
||
|
/* Should never run of entries. */
|
||
|
|
||
|
/* Lookup up the next entry the list. */
|
||
|
off = le32_to_cpu(*last_e);
|
||
|
e = Add2Ptr(rt, off);
|
||
|
|
||
|
/* If this is our match we are done. */
|
||
|
if (off == vbo) {
|
||
|
*last_e = *e;
|
||
|
|
||
|
/*
|
||
|
* If this was the last entry, we update that
|
||
|
* table as well.
|
||
|
*/
|
||
|
if (le32_to_cpu(rt->last_free) == off)
|
||
|
rt->last_free = cpu_to_le32(last_off);
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
skip_looking:
|
||
|
/* If the list is now empty, we fix the last_free as well. */
|
||
|
if (!rt->first_free)
|
||
|
rt->last_free = 0;
|
||
|
|
||
|
/* Zero this entry. */
|
||
|
memset(e, 0, esize);
|
||
|
*e = RESTART_ENTRY_ALLOCATED_LE;
|
||
|
|
||
|
le16_add_cpu(&rt->total, 1);
|
||
|
|
||
|
return e;
|
||
|
}
|
||
|
|
||
|
#define RESTART_SINGLE_PAGE_IO cpu_to_le16(0x0001)
|
||
|
|
||
|
#define NTFSLOG_WRAPPED 0x00000001
|
||
|
#define NTFSLOG_MULTIPLE_PAGE_IO 0x00000002
|
||
|
#define NTFSLOG_NO_LAST_LSN 0x00000004
|
||
|
#define NTFSLOG_REUSE_TAIL 0x00000010
|
||
|
#define NTFSLOG_NO_OLDEST_LSN 0x00000020
|
||
|
|
||
|
/* Helper struct to work with NTFS $LogFile. */
|
||
|
struct ntfs_log {
|
||
|
struct ntfs_inode *ni;
|
||
|
|
||
|
u32 l_size;
|
||
|
u32 sys_page_size;
|
||
|
u32 sys_page_mask;
|
||
|
u32 page_size;
|
||
|
u32 page_mask; // page_size - 1
|
||
|
u8 page_bits;
|
||
|
struct RECORD_PAGE_HDR *one_page_buf;
|
||
|
|
||
|
struct RESTART_TABLE *open_attr_tbl;
|
||
|
u32 transaction_id;
|
||
|
u32 clst_per_page;
|
||
|
|
||
|
u32 first_page;
|
||
|
u32 next_page;
|
||
|
u32 ra_off;
|
||
|
u32 data_off;
|
||
|
u32 restart_size;
|
||
|
u32 data_size;
|
||
|
u16 record_header_len;
|
||
|
u64 seq_num;
|
||
|
u32 seq_num_bits;
|
||
|
u32 file_data_bits;
|
||
|
u32 seq_num_mask; /* (1 << file_data_bits) - 1 */
|
||
|
|
||
|
struct RESTART_AREA *ra; /* In-memory image of the next restart area. */
|
||
|
u32 ra_size; /* The usable size of the restart area. */
|
||
|
|
||
|
/*
|
||
|
* If true, then the in-memory restart area is to be written
|
||
|
* to the first position on the disk.
|
||
|
*/
|
||
|
bool init_ra;
|
||
|
bool set_dirty; /* True if we need to set dirty flag. */
|
||
|
|
||
|
u64 oldest_lsn;
|
||
|
|
||
|
u32 oldest_lsn_off;
|
||
|
u64 last_lsn;
|
||
|
|
||
|
u32 total_avail;
|
||
|
u32 total_avail_pages;
|
||
|
u32 total_undo_commit;
|
||
|
u32 max_current_avail;
|
||
|
u32 current_avail;
|
||
|
u32 reserved;
|
||
|
|
||
|
short major_ver;
|
||
|
short minor_ver;
|
||
|
|
||
|
u32 l_flags; /* See NTFSLOG_XXX */
|
||
|
u32 current_openlog_count; /* On-disk value for open_log_count. */
|
||
|
|
||
|
struct CLIENT_ID client_id;
|
||
|
u32 client_undo_commit;
|
||
|
};
|
||
|
|
||
|
static inline u32 lsn_to_vbo(struct ntfs_log *log, const u64 lsn)
|
||
|
{
|
||
|
u32 vbo = (lsn << log->seq_num_bits) >> (log->seq_num_bits - 3);
|
||
|
|
||
|
return vbo;
|
||
|
}
|
||
|
|
||
|
/* Compute the offset in the log file of the next log page. */
|
||
|
static inline u32 next_page_off(struct ntfs_log *log, u32 off)
|
||
|
{
|
||
|
off = (off & ~log->sys_page_mask) + log->page_size;
|
||
|
return off >= log->l_size ? log->first_page : off;
|
||
|
}
|
||
|
|
||
|
static inline u32 lsn_to_page_off(struct ntfs_log *log, u64 lsn)
|
||
|
{
|
||
|
return (((u32)lsn) << 3) & log->page_mask;
|
||
|
}
|
||
|
|
||
|
static inline u64 vbo_to_lsn(struct ntfs_log *log, u32 off, u64 Seq)
|
||
|
{
|
||
|
return (off >> 3) + (Seq << log->file_data_bits);
|
||
|
}
|
||
|
|
||
|
static inline bool is_lsn_in_file(struct ntfs_log *log, u64 lsn)
|
||
|
{
|
||
|
return lsn >= log->oldest_lsn &&
|
||
|
lsn <= le64_to_cpu(log->ra->current_lsn);
|
||
|
}
|
||
|
|
||
|
static inline u32 hdr_file_off(struct ntfs_log *log,
|
||
|
struct RECORD_PAGE_HDR *hdr)
|
||
|
{
|
||
|
if (log->major_ver < 2)
|
||
|
return le64_to_cpu(hdr->rhdr.lsn);
|
||
|
|
||
|
return le32_to_cpu(hdr->file_off);
|
||
|
}
|
||
|
|
||
|
static inline u64 base_lsn(struct ntfs_log *log,
|
||
|
const struct RECORD_PAGE_HDR *hdr, u64 lsn)
|
||
|
{
|
||
|
u64 h_lsn = le64_to_cpu(hdr->rhdr.lsn);
|
||
|
u64 ret = (((h_lsn >> log->file_data_bits) +
|
||
|
(lsn < (lsn_to_vbo(log, h_lsn) & ~log->page_mask) ? 1 : 0))
|
||
|
<< log->file_data_bits) +
|
||
|
((((is_log_record_end(hdr) &&
|
||
|
h_lsn <= le64_to_cpu(hdr->record_hdr.last_end_lsn))
|
||
|
? le16_to_cpu(hdr->record_hdr.next_record_off)
|
||
|
: log->page_size) +
|
||
|
lsn) >>
|
||
|
3);
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static inline bool verify_client_lsn(struct ntfs_log *log,
|
||
|
const struct CLIENT_REC *client, u64 lsn)
|
||
|
{
|
||
|
return lsn >= le64_to_cpu(client->oldest_lsn) &&
|
||
|
lsn <= le64_to_cpu(log->ra->current_lsn) && lsn;
|
||
|
}
|
||
|
|
||
|
struct restart_info {
|
||
|
u64 last_lsn;
|
||
|
struct RESTART_HDR *r_page;
|
||
|
u32 vbo;
|
||
|
bool chkdsk_was_run;
|
||
|
bool valid_page;
|
||
|
bool initialized;
|
||
|
bool restart;
|
||
|
};
|
||
|
|
||
|
static int read_log_page(struct ntfs_log *log, u32 vbo,
|
||
|
struct RECORD_PAGE_HDR **buffer, bool *usa_error)
|
||
|
{
|
||
|
int err = 0;
|
||
|
u32 page_idx = vbo >> log->page_bits;
|
||
|
u32 page_off = vbo & log->page_mask;
|
||
|
u32 bytes = log->page_size - page_off;
|
||
|
void *to_free = NULL;
|
||
|
u32 page_vbo = page_idx << log->page_bits;
|
||
|
struct RECORD_PAGE_HDR *page_buf;
|
||
|
struct ntfs_inode *ni = log->ni;
|
||
|
bool bBAAD;
|
||
|
|
||
|
if (vbo >= log->l_size)
|
||
|
return -EINVAL;
|
||
|
|
||
|
if (!*buffer) {
|
||
|
to_free = kmalloc(log->page_size, GFP_NOFS);
|
||
|
if (!to_free)
|
||
|
return -ENOMEM;
|
||
|
*buffer = to_free;
|
||
|
}
|
||
|
|
||
|
page_buf = page_off ? log->one_page_buf : *buffer;
|
||
|
|
||
|
err = ntfs_read_run_nb(ni->mi.sbi, &ni->file.run, page_vbo, page_buf,
|
||
|
log->page_size, NULL);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
if (page_buf->rhdr.sign != NTFS_FFFF_SIGNATURE)
|
||
|
ntfs_fix_post_read(&page_buf->rhdr, PAGE_SIZE, false);
|
||
|
|
||
|
if (page_buf != *buffer)
|
||
|
memcpy(*buffer, Add2Ptr(page_buf, page_off), bytes);
|
||
|
|
||
|
bBAAD = page_buf->rhdr.sign == NTFS_BAAD_SIGNATURE;
|
||
|
|
||
|
if (usa_error)
|
||
|
*usa_error = bBAAD;
|
||
|
/* Check that the update sequence array for this page is valid */
|
||
|
/* If we don't allow errors, raise an error status */
|
||
|
else if (bBAAD)
|
||
|
err = -EINVAL;
|
||
|
|
||
|
out:
|
||
|
if (err && to_free) {
|
||
|
kfree(to_free);
|
||
|
*buffer = NULL;
|
||
|
}
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* log_read_rst
|
||
|
*
|
||
|
* It walks through 512 blocks of the file looking for a valid
|
||
|
* restart page header. It will stop the first time we find a
|
||
|
* valid page header.
|
||
|
*/
|
||
|
static int log_read_rst(struct ntfs_log *log, u32 l_size, bool first,
|
||
|
struct restart_info *info)
|
||
|
{
|
||
|
u32 skip, vbo;
|
||
|
struct RESTART_HDR *r_page = NULL;
|
||
|
|
||
|
/* Determine which restart area we are looking for. */
|
||
|
if (first) {
|
||
|
vbo = 0;
|
||
|
skip = 512;
|
||
|
} else {
|
||
|
vbo = 512;
|
||
|
skip = 0;
|
||
|
}
|
||
|
|
||
|
/* Loop continuously until we succeed. */
|
||
|
for (; vbo < l_size; vbo = 2 * vbo + skip, skip = 0) {
|
||
|
bool usa_error;
|
||
|
bool brst, bchk;
|
||
|
struct RESTART_AREA *ra;
|
||
|
|
||
|
/* Read a page header at the current offset. */
|
||
|
if (read_log_page(log, vbo, (struct RECORD_PAGE_HDR **)&r_page,
|
||
|
&usa_error)) {
|
||
|
/* Ignore any errors. */
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
/* Exit if the signature is a log record page. */
|
||
|
if (r_page->rhdr.sign == NTFS_RCRD_SIGNATURE) {
|
||
|
info->initialized = true;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
brst = r_page->rhdr.sign == NTFS_RSTR_SIGNATURE;
|
||
|
bchk = r_page->rhdr.sign == NTFS_CHKD_SIGNATURE;
|
||
|
|
||
|
if (!bchk && !brst) {
|
||
|
if (r_page->rhdr.sign != NTFS_FFFF_SIGNATURE) {
|
||
|
/*
|
||
|
* Remember if the signature does not
|
||
|
* indicate uninitialized file.
|
||
|
*/
|
||
|
info->initialized = true;
|
||
|
}
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
ra = NULL;
|
||
|
info->valid_page = false;
|
||
|
info->initialized = true;
|
||
|
info->vbo = vbo;
|
||
|
|
||
|
/* Let's check the restart area if this is a valid page. */
|
||
|
if (!is_rst_page_hdr_valid(vbo, r_page))
|
||
|
goto check_result;
|
||
|
ra = Add2Ptr(r_page, le16_to_cpu(r_page->ra_off));
|
||
|
|
||
|
if (!is_rst_area_valid(r_page))
|
||
|
goto check_result;
|
||
|
|
||
|
/*
|
||
|
* We have a valid restart page header and restart area.
|
||
|
* If chkdsk was run or we have no clients then we have
|
||
|
* no more checking to do.
|
||
|
*/
|
||
|
if (bchk || ra->client_idx[1] == LFS_NO_CLIENT_LE) {
|
||
|
info->valid_page = true;
|
||
|
goto check_result;
|
||
|
}
|
||
|
|
||
|
if (is_client_area_valid(r_page, usa_error)) {
|
||
|
info->valid_page = true;
|
||
|
ra = Add2Ptr(r_page, le16_to_cpu(r_page->ra_off));
|
||
|
}
|
||
|
|
||
|
check_result:
|
||
|
/*
|
||
|
* If chkdsk was run then update the caller's
|
||
|
* values and return.
|
||
|
*/
|
||
|
if (r_page->rhdr.sign == NTFS_CHKD_SIGNATURE) {
|
||
|
info->chkdsk_was_run = true;
|
||
|
info->last_lsn = le64_to_cpu(r_page->rhdr.lsn);
|
||
|
info->restart = true;
|
||
|
info->r_page = r_page;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If we have a valid page then copy the values
|
||
|
* we need from it.
|
||
|
*/
|
||
|
if (info->valid_page) {
|
||
|
info->last_lsn = le64_to_cpu(ra->current_lsn);
|
||
|
info->restart = true;
|
||
|
info->r_page = r_page;
|
||
|
return 0;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
kfree(r_page);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Ilog_init_pg_hdr - Init @log from restart page header.
|
||
|
*/
|
||
|
static void log_init_pg_hdr(struct ntfs_log *log, u32 sys_page_size,
|
||
|
u32 page_size, u16 major_ver, u16 minor_ver)
|
||
|
{
|
||
|
log->sys_page_size = sys_page_size;
|
||
|
log->sys_page_mask = sys_page_size - 1;
|
||
|
log->page_size = page_size;
|
||
|
log->page_mask = page_size - 1;
|
||
|
log->page_bits = blksize_bits(page_size);
|
||
|
|
||
|
log->clst_per_page = log->page_size >> log->ni->mi.sbi->cluster_bits;
|
||
|
if (!log->clst_per_page)
|
||
|
log->clst_per_page = 1;
|
||
|
|
||
|
log->first_page = major_ver >= 2
|
||
|
? 0x22 * page_size
|
||
|
: ((sys_page_size << 1) + (page_size << 1));
|
||
|
log->major_ver = major_ver;
|
||
|
log->minor_ver = minor_ver;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* log_create - Init @log in cases when we don't have a restart area to use.
|
||
|
*/
|
||
|
static void log_create(struct ntfs_log *log, u32 l_size, const u64 last_lsn,
|
||
|
u32 open_log_count, bool wrapped, bool use_multi_page)
|
||
|
{
|
||
|
log->l_size = l_size;
|
||
|
/* All file offsets must be quadword aligned. */
|
||
|
log->file_data_bits = blksize_bits(l_size) - 3;
|
||
|
log->seq_num_mask = (8 << log->file_data_bits) - 1;
|
||
|
log->seq_num_bits = sizeof(u64) * 8 - log->file_data_bits;
|
||
|
log->seq_num = (last_lsn >> log->file_data_bits) + 2;
|
||
|
log->next_page = log->first_page;
|
||
|
log->oldest_lsn = log->seq_num << log->file_data_bits;
|
||
|
log->oldest_lsn_off = 0;
|
||
|
log->last_lsn = log->oldest_lsn;
|
||
|
|
||
|
log->l_flags |= NTFSLOG_NO_LAST_LSN | NTFSLOG_NO_OLDEST_LSN;
|
||
|
|
||
|
/* Set the correct flags for the I/O and indicate if we have wrapped. */
|
||
|
if (wrapped)
|
||
|
log->l_flags |= NTFSLOG_WRAPPED;
|
||
|
|
||
|
if (use_multi_page)
|
||
|
log->l_flags |= NTFSLOG_MULTIPLE_PAGE_IO;
|
||
|
|
||
|
/* Compute the log page values. */
|
||
|
log->data_off = ALIGN(
|
||
|
offsetof(struct RECORD_PAGE_HDR, fixups) +
|
||
|
sizeof(short) * ((log->page_size >> SECTOR_SHIFT) + 1),
|
||
|
8);
|
||
|
log->data_size = log->page_size - log->data_off;
|
||
|
log->record_header_len = sizeof(struct LFS_RECORD_HDR);
|
||
|
|
||
|
/* Remember the different page sizes for reservation. */
|
||
|
log->reserved = log->data_size - log->record_header_len;
|
||
|
|
||
|
/* Compute the restart page values. */
|
||
|
log->ra_off = ALIGN(
|
||
|
offsetof(struct RESTART_HDR, fixups) +
|
||
|
sizeof(short) *
|
||
|
((log->sys_page_size >> SECTOR_SHIFT) + 1),
|
||
|
8);
|
||
|
log->restart_size = log->sys_page_size - log->ra_off;
|
||
|
log->ra_size = struct_size(log->ra, clients, 1);
|
||
|
log->current_openlog_count = open_log_count;
|
||
|
|
||
|
/*
|
||
|
* The total available log file space is the number of
|
||
|
* log file pages times the space available on each page.
|
||
|
*/
|
||
|
log->total_avail_pages = log->l_size - log->first_page;
|
||
|
log->total_avail = log->total_avail_pages >> log->page_bits;
|
||
|
|
||
|
/*
|
||
|
* We assume that we can't use the end of the page less than
|
||
|
* the file record size.
|
||
|
* Then we won't need to reserve more than the caller asks for.
|
||
|
*/
|
||
|
log->max_current_avail = log->total_avail * log->reserved;
|
||
|
log->total_avail = log->total_avail * log->data_size;
|
||
|
log->current_avail = log->max_current_avail;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* log_create_ra - Fill a restart area from the values stored in @log.
|
||
|
*/
|
||
|
static struct RESTART_AREA *log_create_ra(struct ntfs_log *log)
|
||
|
{
|
||
|
struct CLIENT_REC *cr;
|
||
|
struct RESTART_AREA *ra = kzalloc(log->restart_size, GFP_NOFS);
|
||
|
|
||
|
if (!ra)
|
||
|
return NULL;
|
||
|
|
||
|
ra->current_lsn = cpu_to_le64(log->last_lsn);
|
||
|
ra->log_clients = cpu_to_le16(1);
|
||
|
ra->client_idx[1] = LFS_NO_CLIENT_LE;
|
||
|
if (log->l_flags & NTFSLOG_MULTIPLE_PAGE_IO)
|
||
|
ra->flags = RESTART_SINGLE_PAGE_IO;
|
||
|
ra->seq_num_bits = cpu_to_le32(log->seq_num_bits);
|
||
|
ra->ra_len = cpu_to_le16(log->ra_size);
|
||
|
ra->client_off = cpu_to_le16(offsetof(struct RESTART_AREA, clients));
|
||
|
ra->l_size = cpu_to_le64(log->l_size);
|
||
|
ra->rec_hdr_len = cpu_to_le16(log->record_header_len);
|
||
|
ra->data_off = cpu_to_le16(log->data_off);
|
||
|
ra->open_log_count = cpu_to_le32(log->current_openlog_count + 1);
|
||
|
|
||
|
cr = ra->clients;
|
||
|
|
||
|
cr->prev_client = LFS_NO_CLIENT_LE;
|
||
|
cr->next_client = LFS_NO_CLIENT_LE;
|
||
|
|
||
|
return ra;
|
||
|
}
|
||
|
|
||
|
static u32 final_log_off(struct ntfs_log *log, u64 lsn, u32 data_len)
|
||
|
{
|
||
|
u32 base_vbo = lsn << 3;
|
||
|
u32 final_log_off = (base_vbo & log->seq_num_mask) & ~log->page_mask;
|
||
|
u32 page_off = base_vbo & log->page_mask;
|
||
|
u32 tail = log->page_size - page_off;
|
||
|
|
||
|
page_off -= 1;
|
||
|
|
||
|
/* Add the length of the header. */
|
||
|
data_len += log->record_header_len;
|
||
|
|
||
|
/*
|
||
|
* If this lsn is contained this log page we are done.
|
||
|
* Otherwise we need to walk through several log pages.
|
||
|
*/
|
||
|
if (data_len > tail) {
|
||
|
data_len -= tail;
|
||
|
tail = log->data_size;
|
||
|
page_off = log->data_off - 1;
|
||
|
|
||
|
for (;;) {
|
||
|
final_log_off = next_page_off(log, final_log_off);
|
||
|
|
||
|
/*
|
||
|
* We are done if the remaining bytes
|
||
|
* fit on this page.
|
||
|
*/
|
||
|
if (data_len <= tail)
|
||
|
break;
|
||
|
data_len -= tail;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* We add the remaining bytes to our starting position on this page
|
||
|
* and then add that value to the file offset of this log page.
|
||
|
*/
|
||
|
return final_log_off + data_len + page_off;
|
||
|
}
|
||
|
|
||
|
static int next_log_lsn(struct ntfs_log *log, const struct LFS_RECORD_HDR *rh,
|
||
|
u64 *lsn)
|
||
|
{
|
||
|
int err;
|
||
|
u64 this_lsn = le64_to_cpu(rh->this_lsn);
|
||
|
u32 vbo = lsn_to_vbo(log, this_lsn);
|
||
|
u32 end =
|
||
|
final_log_off(log, this_lsn, le32_to_cpu(rh->client_data_len));
|
||
|
u32 hdr_off = end & ~log->sys_page_mask;
|
||
|
u64 seq = this_lsn >> log->file_data_bits;
|
||
|
struct RECORD_PAGE_HDR *page = NULL;
|
||
|
|
||
|
/* Remember if we wrapped. */
|
||
|
if (end <= vbo)
|
||
|
seq += 1;
|
||
|
|
||
|
/* Log page header for this page. */
|
||
|
err = read_log_page(log, hdr_off, &page, NULL);
|
||
|
if (err)
|
||
|
return err;
|
||
|
|
||
|
/*
|
||
|
* If the lsn we were given was not the last lsn on this page,
|
||
|
* then the starting offset for the next lsn is on a quad word
|
||
|
* boundary following the last file offset for the current lsn.
|
||
|
* Otherwise the file offset is the start of the data on the next page.
|
||
|
*/
|
||
|
if (this_lsn == le64_to_cpu(page->rhdr.lsn)) {
|
||
|
/* If we wrapped, we need to increment the sequence number. */
|
||
|
hdr_off = next_page_off(log, hdr_off);
|
||
|
if (hdr_off == log->first_page)
|
||
|
seq += 1;
|
||
|
|
||
|
vbo = hdr_off + log->data_off;
|
||
|
} else {
|
||
|
vbo = ALIGN(end, 8);
|
||
|
}
|
||
|
|
||
|
/* Compute the lsn based on the file offset and the sequence count. */
|
||
|
*lsn = vbo_to_lsn(log, vbo, seq);
|
||
|
|
||
|
/*
|
||
|
* If this lsn is within the legal range for the file, we return true.
|
||
|
* Otherwise false indicates that there are no more lsn's.
|
||
|
*/
|
||
|
if (!is_lsn_in_file(log, *lsn))
|
||
|
*lsn = 0;
|
||
|
|
||
|
kfree(page);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* current_log_avail - Calculate the number of bytes available for log records.
|
||
|
*/
|
||
|
static u32 current_log_avail(struct ntfs_log *log)
|
||
|
{
|
||
|
u32 oldest_off, next_free_off, free_bytes;
|
||
|
|
||
|
if (log->l_flags & NTFSLOG_NO_LAST_LSN) {
|
||
|
/* The entire file is available. */
|
||
|
return log->max_current_avail;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If there is a last lsn the restart area then we know that we will
|
||
|
* have to compute the free range.
|
||
|
* If there is no oldest lsn then start at the first page of the file.
|
||
|
*/
|
||
|
oldest_off = (log->l_flags & NTFSLOG_NO_OLDEST_LSN)
|
||
|
? log->first_page
|
||
|
: (log->oldest_lsn_off & ~log->sys_page_mask);
|
||
|
|
||
|
/*
|
||
|
* We will use the next log page offset to compute the next free page.
|
||
|
* If we are going to reuse this page go to the next page.
|
||
|
* If we are at the first page then use the end of the file.
|
||
|
*/
|
||
|
next_free_off = (log->l_flags & NTFSLOG_REUSE_TAIL)
|
||
|
? log->next_page + log->page_size
|
||
|
: log->next_page == log->first_page
|
||
|
? log->l_size
|
||
|
: log->next_page;
|
||
|
|
||
|
/* If the two offsets are the same then there is no available space. */
|
||
|
if (oldest_off == next_free_off)
|
||
|
return 0;
|
||
|
/*
|
||
|
* If the free offset follows the oldest offset then subtract
|
||
|
* this range from the total available pages.
|
||
|
*/
|
||
|
free_bytes =
|
||
|
oldest_off < next_free_off
|
||
|
? log->total_avail_pages - (next_free_off - oldest_off)
|
||
|
: oldest_off - next_free_off;
|
||
|
|
||
|
free_bytes >>= log->page_bits;
|
||
|
return free_bytes * log->reserved;
|
||
|
}
|
||
|
|
||
|
static bool check_subseq_log_page(struct ntfs_log *log,
|
||
|
const struct RECORD_PAGE_HDR *rp, u32 vbo,
|
||
|
u64 seq)
|
||
|
{
|
||
|
u64 lsn_seq;
|
||
|
const struct NTFS_RECORD_HEADER *rhdr = &rp->rhdr;
|
||
|
u64 lsn = le64_to_cpu(rhdr->lsn);
|
||
|
|
||
|
if (rhdr->sign == NTFS_FFFF_SIGNATURE || !rhdr->sign)
|
||
|
return false;
|
||
|
|
||
|
/*
|
||
|
* If the last lsn on the page occurs was written after the page
|
||
|
* that caused the original error then we have a fatal error.
|
||
|
*/
|
||
|
lsn_seq = lsn >> log->file_data_bits;
|
||
|
|
||
|
/*
|
||
|
* If the sequence number for the lsn the page is equal or greater
|
||
|
* than lsn we expect, then this is a subsequent write.
|
||
|
*/
|
||
|
return lsn_seq >= seq ||
|
||
|
(lsn_seq == seq - 1 && log->first_page == vbo &&
|
||
|
vbo != (lsn_to_vbo(log, lsn) & ~log->page_mask));
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* last_log_lsn
|
||
|
*
|
||
|
* Walks through the log pages for a file, searching for the
|
||
|
* last log page written to the file.
|
||
|
*/
|
||
|
static int last_log_lsn(struct ntfs_log *log)
|
||
|
{
|
||
|
int err;
|
||
|
bool usa_error = false;
|
||
|
bool replace_page = false;
|
||
|
bool reuse_page = log->l_flags & NTFSLOG_REUSE_TAIL;
|
||
|
bool wrapped_file, wrapped;
|
||
|
|
||
|
u32 page_cnt = 1, page_pos = 1;
|
||
|
u32 page_off = 0, page_off1 = 0, saved_off = 0;
|
||
|
u32 final_off, second_off, final_off_prev = 0, second_off_prev = 0;
|
||
|
u32 first_file_off = 0, second_file_off = 0;
|
||
|
u32 part_io_count = 0;
|
||
|
u32 tails = 0;
|
||
|
u32 this_off, curpage_off, nextpage_off, remain_pages;
|
||
|
|
||
|
u64 expected_seq, seq_base = 0, lsn_base = 0;
|
||
|
u64 best_lsn, best_lsn1, best_lsn2;
|
||
|
u64 lsn_cur, lsn1, lsn2;
|
||
|
u64 last_ok_lsn = reuse_page ? log->last_lsn : 0;
|
||
|
|
||
|
u16 cur_pos, best_page_pos;
|
||
|
|
||
|
struct RECORD_PAGE_HDR *page = NULL;
|
||
|
struct RECORD_PAGE_HDR *tst_page = NULL;
|
||
|
struct RECORD_PAGE_HDR *first_tail = NULL;
|
||
|
struct RECORD_PAGE_HDR *second_tail = NULL;
|
||
|
struct RECORD_PAGE_HDR *tail_page = NULL;
|
||
|
struct RECORD_PAGE_HDR *second_tail_prev = NULL;
|
||
|
struct RECORD_PAGE_HDR *first_tail_prev = NULL;
|
||
|
struct RECORD_PAGE_HDR *page_bufs = NULL;
|
||
|
struct RECORD_PAGE_HDR *best_page;
|
||
|
|
||
|
if (log->major_ver >= 2) {
|
||
|
final_off = 0x02 * log->page_size;
|
||
|
second_off = 0x12 * log->page_size;
|
||
|
|
||
|
// 0x10 == 0x12 - 0x2
|
||
|
page_bufs = kmalloc(log->page_size * 0x10, GFP_NOFS);
|
||
|
if (!page_bufs)
|
||
|
return -ENOMEM;
|
||
|
} else {
|
||
|
second_off = log->first_page - log->page_size;
|
||
|
final_off = second_off - log->page_size;
|
||
|
}
|
||
|
|
||
|
next_tail:
|
||
|
/* Read second tail page (at pos 3/0x12000). */
|
||
|
if (read_log_page(log, second_off, &second_tail, &usa_error) ||
|
||
|
usa_error || second_tail->rhdr.sign != NTFS_RCRD_SIGNATURE) {
|
||
|
kfree(second_tail);
|
||
|
second_tail = NULL;
|
||
|
second_file_off = 0;
|
||
|
lsn2 = 0;
|
||
|
} else {
|
||
|
second_file_off = hdr_file_off(log, second_tail);
|
||
|
lsn2 = le64_to_cpu(second_tail->record_hdr.last_end_lsn);
|
||
|
}
|
||
|
|
||
|
/* Read first tail page (at pos 2/0x2000). */
|
||
|
if (read_log_page(log, final_off, &first_tail, &usa_error) ||
|
||
|
usa_error || first_tail->rhdr.sign != NTFS_RCRD_SIGNATURE) {
|
||
|
kfree(first_tail);
|
||
|
first_tail = NULL;
|
||
|
first_file_off = 0;
|
||
|
lsn1 = 0;
|
||
|
} else {
|
||
|
first_file_off = hdr_file_off(log, first_tail);
|
||
|
lsn1 = le64_to_cpu(first_tail->record_hdr.last_end_lsn);
|
||
|
}
|
||
|
|
||
|
if (log->major_ver < 2) {
|
||
|
int best_page;
|
||
|
|
||
|
first_tail_prev = first_tail;
|
||
|
final_off_prev = first_file_off;
|
||
|
second_tail_prev = second_tail;
|
||
|
second_off_prev = second_file_off;
|
||
|
tails = 1;
|
||
|
|
||
|
if (!first_tail && !second_tail)
|
||
|
goto tail_read;
|
||
|
|
||
|
if (first_tail && second_tail)
|
||
|
best_page = lsn1 < lsn2 ? 1 : 0;
|
||
|
else if (first_tail)
|
||
|
best_page = 0;
|
||
|
else
|
||
|
best_page = 1;
|
||
|
|
||
|
page_off = best_page ? second_file_off : first_file_off;
|
||
|
seq_base = (best_page ? lsn2 : lsn1) >> log->file_data_bits;
|
||
|
goto tail_read;
|
||
|
}
|
||
|
|
||
|
best_lsn1 = first_tail ? base_lsn(log, first_tail, first_file_off) : 0;
|
||
|
best_lsn2 =
|
||
|
second_tail ? base_lsn(log, second_tail, second_file_off) : 0;
|
||
|
|
||
|
if (first_tail && second_tail) {
|
||
|
if (best_lsn1 > best_lsn2) {
|
||
|
best_lsn = best_lsn1;
|
||
|
best_page = first_tail;
|
||
|
this_off = first_file_off;
|
||
|
} else {
|
||
|
best_lsn = best_lsn2;
|
||
|
best_page = second_tail;
|
||
|
this_off = second_file_off;
|
||
|
}
|
||
|
} else if (first_tail) {
|
||
|
best_lsn = best_lsn1;
|
||
|
best_page = first_tail;
|
||
|
this_off = first_file_off;
|
||
|
} else if (second_tail) {
|
||
|
best_lsn = best_lsn2;
|
||
|
best_page = second_tail;
|
||
|
this_off = second_file_off;
|
||
|
} else {
|
||
|
goto tail_read;
|
||
|
}
|
||
|
|
||
|
best_page_pos = le16_to_cpu(best_page->page_pos);
|
||
|
|
||
|
if (!tails) {
|
||
|
if (best_page_pos == page_pos) {
|
||
|
seq_base = best_lsn >> log->file_data_bits;
|
||
|
saved_off = page_off = le32_to_cpu(best_page->file_off);
|
||
|
lsn_base = best_lsn;
|
||
|
|
||
|
memmove(page_bufs, best_page, log->page_size);
|
||
|
|
||
|
page_cnt = le16_to_cpu(best_page->page_count);
|
||
|
if (page_cnt > 1)
|
||
|
page_pos += 1;
|
||
|
|
||
|
tails = 1;
|
||
|
}
|
||
|
} else if (seq_base == (best_lsn >> log->file_data_bits) &&
|
||
|
saved_off + log->page_size == this_off &&
|
||
|
lsn_base < best_lsn &&
|
||
|
(page_pos != page_cnt || best_page_pos == page_pos ||
|
||
|
best_page_pos == 1) &&
|
||
|
(page_pos >= page_cnt || best_page_pos == page_pos)) {
|
||
|
u16 bppc = le16_to_cpu(best_page->page_count);
|
||
|
|
||
|
saved_off += log->page_size;
|
||
|
lsn_base = best_lsn;
|
||
|
|
||
|
memmove(Add2Ptr(page_bufs, tails * log->page_size), best_page,
|
||
|
log->page_size);
|
||
|
|
||
|
tails += 1;
|
||
|
|
||
|
if (best_page_pos != bppc) {
|
||
|
page_cnt = bppc;
|
||
|
page_pos = best_page_pos;
|
||
|
|
||
|
if (page_cnt > 1)
|
||
|
page_pos += 1;
|
||
|
} else {
|
||
|
page_pos = page_cnt = 1;
|
||
|
}
|
||
|
} else {
|
||
|
kfree(first_tail);
|
||
|
kfree(second_tail);
|
||
|
goto tail_read;
|
||
|
}
|
||
|
|
||
|
kfree(first_tail_prev);
|
||
|
first_tail_prev = first_tail;
|
||
|
final_off_prev = first_file_off;
|
||
|
first_tail = NULL;
|
||
|
|
||
|
kfree(second_tail_prev);
|
||
|
second_tail_prev = second_tail;
|
||
|
second_off_prev = second_file_off;
|
||
|
second_tail = NULL;
|
||
|
|
||
|
final_off += log->page_size;
|
||
|
second_off += log->page_size;
|
||
|
|
||
|
if (tails < 0x10)
|
||
|
goto next_tail;
|
||
|
tail_read:
|
||
|
first_tail = first_tail_prev;
|
||
|
final_off = final_off_prev;
|
||
|
|
||
|
second_tail = second_tail_prev;
|
||
|
second_off = second_off_prev;
|
||
|
|
||
|
page_cnt = page_pos = 1;
|
||
|
|
||
|
curpage_off = seq_base == log->seq_num ? min(log->next_page, page_off)
|
||
|
: log->next_page;
|
||
|
|
||
|
wrapped_file =
|
||
|
curpage_off == log->first_page &&
|
||
|
!(log->l_flags & (NTFSLOG_NO_LAST_LSN | NTFSLOG_REUSE_TAIL));
|
||
|
|
||
|
expected_seq = wrapped_file ? (log->seq_num + 1) : log->seq_num;
|
||
|
|
||
|
nextpage_off = curpage_off;
|
||
|
|
||
|
next_page:
|
||
|
tail_page = NULL;
|
||
|
/* Read the next log page. */
|
||
|
err = read_log_page(log, curpage_off, &page, &usa_error);
|
||
|
|
||
|
/* Compute the next log page offset the file. */
|
||
|
nextpage_off = next_page_off(log, curpage_off);
|
||
|
wrapped = nextpage_off == log->first_page;
|
||
|
|
||
|
if (tails > 1) {
|
||
|
struct RECORD_PAGE_HDR *cur_page =
|
||
|
Add2Ptr(page_bufs, curpage_off - page_off);
|
||
|
|
||
|
if (curpage_off == saved_off) {
|
||
|
tail_page = cur_page;
|
||
|
goto use_tail_page;
|
||
|
}
|
||
|
|
||
|
if (page_off > curpage_off || curpage_off >= saved_off)
|
||
|
goto use_tail_page;
|
||
|
|
||
|
if (page_off1)
|
||
|
goto use_cur_page;
|
||
|
|
||
|
if (!err && !usa_error &&
|
||
|
page->rhdr.sign == NTFS_RCRD_SIGNATURE &&
|
||
|
cur_page->rhdr.lsn == page->rhdr.lsn &&
|
||
|
cur_page->record_hdr.next_record_off ==
|
||
|
page->record_hdr.next_record_off &&
|
||
|
((page_pos == page_cnt &&
|
||
|
le16_to_cpu(page->page_pos) == 1) ||
|
||
|
(page_pos != page_cnt &&
|
||
|
le16_to_cpu(page->page_pos) == page_pos + 1 &&
|
||
|
le16_to_cpu(page->page_count) == page_cnt))) {
|
||
|
cur_page = NULL;
|
||
|
goto use_tail_page;
|
||
|
}
|
||
|
|
||
|
page_off1 = page_off;
|
||
|
|
||
|
use_cur_page:
|
||
|
|
||
|
lsn_cur = le64_to_cpu(cur_page->rhdr.lsn);
|
||
|
|
||
|
if (last_ok_lsn !=
|
||
|
le64_to_cpu(cur_page->record_hdr.last_end_lsn) &&
|
||
|
((lsn_cur >> log->file_data_bits) +
|
||
|
((curpage_off <
|
||
|
(lsn_to_vbo(log, lsn_cur) & ~log->page_mask))
|
||
|
? 1
|
||
|
: 0)) != expected_seq) {
|
||
|
goto check_tail;
|
||
|
}
|
||
|
|
||
|
if (!is_log_record_end(cur_page)) {
|
||
|
tail_page = NULL;
|
||
|
last_ok_lsn = lsn_cur;
|
||
|
goto next_page_1;
|
||
|
}
|
||
|
|
||
|
log->seq_num = expected_seq;
|
||
|
log->l_flags &= ~NTFSLOG_NO_LAST_LSN;
|
||
|
log->last_lsn = le64_to_cpu(cur_page->record_hdr.last_end_lsn);
|
||
|
log->ra->current_lsn = cur_page->record_hdr.last_end_lsn;
|
||
|
|
||
|
if (log->record_header_len <=
|
||
|
log->page_size -
|
||
|
le16_to_cpu(cur_page->record_hdr.next_record_off)) {
|
||
|
log->l_flags |= NTFSLOG_REUSE_TAIL;
|
||
|
log->next_page = curpage_off;
|
||
|
} else {
|
||
|
log->l_flags &= ~NTFSLOG_REUSE_TAIL;
|
||
|
log->next_page = nextpage_off;
|
||
|
}
|
||
|
|
||
|
if (wrapped_file)
|
||
|
log->l_flags |= NTFSLOG_WRAPPED;
|
||
|
|
||
|
last_ok_lsn = le64_to_cpu(cur_page->record_hdr.last_end_lsn);
|
||
|
goto next_page_1;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If we are at the expected first page of a transfer check to see
|
||
|
* if either tail copy is at this offset.
|
||
|
* If this page is the last page of a transfer, check if we wrote
|
||
|
* a subsequent tail copy.
|
||
|
*/
|
||
|
if (page_cnt == page_pos || page_cnt == page_pos + 1) {
|
||
|
/*
|
||
|
* Check if the offset matches either the first or second
|
||
|
* tail copy. It is possible it will match both.
|
||
|
*/
|
||
|
if (curpage_off == final_off)
|
||
|
tail_page = first_tail;
|
||
|
|
||
|
/*
|
||
|
* If we already matched on the first page then
|
||
|
* check the ending lsn's.
|
||
|
*/
|
||
|
if (curpage_off == second_off) {
|
||
|
if (!tail_page ||
|
||
|
(second_tail &&
|
||
|
le64_to_cpu(second_tail->record_hdr.last_end_lsn) >
|
||
|
le64_to_cpu(first_tail->record_hdr
|
||
|
.last_end_lsn))) {
|
||
|
tail_page = second_tail;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
use_tail_page:
|
||
|
if (tail_page) {
|
||
|
/* We have a candidate for a tail copy. */
|
||
|
lsn_cur = le64_to_cpu(tail_page->record_hdr.last_end_lsn);
|
||
|
|
||
|
if (last_ok_lsn < lsn_cur) {
|
||
|
/*
|
||
|
* If the sequence number is not expected,
|
||
|
* then don't use the tail copy.
|
||
|
*/
|
||
|
if (expected_seq != (lsn_cur >> log->file_data_bits))
|
||
|
tail_page = NULL;
|
||
|
} else if (last_ok_lsn > lsn_cur) {
|
||
|
/*
|
||
|
* If the last lsn is greater than the one on
|
||
|
* this page then forget this tail.
|
||
|
*/
|
||
|
tail_page = NULL;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
*If we have an error on the current page,
|
||
|
* we will break of this loop.
|
||
|
*/
|
||
|
if (err || usa_error)
|
||
|
goto check_tail;
|
||
|
|
||
|
/*
|
||
|
* Done if the last lsn on this page doesn't match the previous known
|
||
|
* last lsn or the sequence number is not expected.
|
||
|
*/
|
||
|
lsn_cur = le64_to_cpu(page->rhdr.lsn);
|
||
|
if (last_ok_lsn != lsn_cur &&
|
||
|
expected_seq != (lsn_cur >> log->file_data_bits)) {
|
||
|
goto check_tail;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Check that the page position and page count values are correct.
|
||
|
* If this is the first page of a transfer the position must be 1
|
||
|
* and the count will be unknown.
|
||
|
*/
|
||
|
if (page_cnt == page_pos) {
|
||
|
if (page->page_pos != cpu_to_le16(1) &&
|
||
|
(!reuse_page || page->page_pos != page->page_count)) {
|
||
|
/*
|
||
|
* If the current page is the first page we are
|
||
|
* looking at and we are reusing this page then
|
||
|
* it can be either the first or last page of a
|
||
|
* transfer. Otherwise it can only be the first.
|
||
|
*/
|
||
|
goto check_tail;
|
||
|
}
|
||
|
} else if (le16_to_cpu(page->page_count) != page_cnt ||
|
||
|
le16_to_cpu(page->page_pos) != page_pos + 1) {
|
||
|
/*
|
||
|
* The page position better be 1 more than the last page
|
||
|
* position and the page count better match.
|
||
|
*/
|
||
|
goto check_tail;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* We have a valid page the file and may have a valid page
|
||
|
* the tail copy area.
|
||
|
* If the tail page was written after the page the file then
|
||
|
* break of the loop.
|
||
|
*/
|
||
|
if (tail_page &&
|
||
|
le64_to_cpu(tail_page->record_hdr.last_end_lsn) > lsn_cur) {
|
||
|
/* Remember if we will replace the page. */
|
||
|
replace_page = true;
|
||
|
goto check_tail;
|
||
|
}
|
||
|
|
||
|
tail_page = NULL;
|
||
|
|
||
|
if (is_log_record_end(page)) {
|
||
|
/*
|
||
|
* Since we have read this page we know the sequence number
|
||
|
* is the same as our expected value.
|
||
|
*/
|
||
|
log->seq_num = expected_seq;
|
||
|
log->last_lsn = le64_to_cpu(page->record_hdr.last_end_lsn);
|
||
|
log->ra->current_lsn = page->record_hdr.last_end_lsn;
|
||
|
log->l_flags &= ~NTFSLOG_NO_LAST_LSN;
|
||
|
|
||
|
/*
|
||
|
* If there is room on this page for another header then
|
||
|
* remember we want to reuse the page.
|
||
|
*/
|
||
|
if (log->record_header_len <=
|
||
|
log->page_size -
|
||
|
le16_to_cpu(page->record_hdr.next_record_off)) {
|
||
|
log->l_flags |= NTFSLOG_REUSE_TAIL;
|
||
|
log->next_page = curpage_off;
|
||
|
} else {
|
||
|
log->l_flags &= ~NTFSLOG_REUSE_TAIL;
|
||
|
log->next_page = nextpage_off;
|
||
|
}
|
||
|
|
||
|
/* Remember if we wrapped the log file. */
|
||
|
if (wrapped_file)
|
||
|
log->l_flags |= NTFSLOG_WRAPPED;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Remember the last page count and position.
|
||
|
* Also remember the last known lsn.
|
||
|
*/
|
||
|
page_cnt = le16_to_cpu(page->page_count);
|
||
|
page_pos = le16_to_cpu(page->page_pos);
|
||
|
last_ok_lsn = le64_to_cpu(page->rhdr.lsn);
|
||
|
|
||
|
next_page_1:
|
||
|
|
||
|
if (wrapped) {
|
||
|
expected_seq += 1;
|
||
|
wrapped_file = 1;
|
||
|
}
|
||
|
|
||
|
curpage_off = nextpage_off;
|
||
|
kfree(page);
|
||
|
page = NULL;
|
||
|
reuse_page = 0;
|
||
|
goto next_page;
|
||
|
|
||
|
check_tail:
|
||
|
if (tail_page) {
|
||
|
log->seq_num = expected_seq;
|
||
|
log->last_lsn = le64_to_cpu(tail_page->record_hdr.last_end_lsn);
|
||
|
log->ra->current_lsn = tail_page->record_hdr.last_end_lsn;
|
||
|
log->l_flags &= ~NTFSLOG_NO_LAST_LSN;
|
||
|
|
||
|
if (log->page_size -
|
||
|
le16_to_cpu(
|
||
|
tail_page->record_hdr.next_record_off) >=
|
||
|
log->record_header_len) {
|
||
|
log->l_flags |= NTFSLOG_REUSE_TAIL;
|
||
|
log->next_page = curpage_off;
|
||
|
} else {
|
||
|
log->l_flags &= ~NTFSLOG_REUSE_TAIL;
|
||
|
log->next_page = nextpage_off;
|
||
|
}
|
||
|
|
||
|
if (wrapped)
|
||
|
log->l_flags |= NTFSLOG_WRAPPED;
|
||
|
}
|
||
|
|
||
|
/* Remember that the partial IO will start at the next page. */
|
||
|
second_off = nextpage_off;
|
||
|
|
||
|
/*
|
||
|
* If the next page is the first page of the file then update
|
||
|
* the sequence number for log records which begon the next page.
|
||
|
*/
|
||
|
if (wrapped)
|
||
|
expected_seq += 1;
|
||
|
|
||
|
/*
|
||
|
* If we have a tail copy or are performing single page I/O we can
|
||
|
* immediately look at the next page.
|
||
|
*/
|
||
|
if (replace_page || (log->ra->flags & RESTART_SINGLE_PAGE_IO)) {
|
||
|
page_cnt = 2;
|
||
|
page_pos = 1;
|
||
|
goto check_valid;
|
||
|
}
|
||
|
|
||
|
if (page_pos != page_cnt)
|
||
|
goto check_valid;
|
||
|
/*
|
||
|
* If the next page causes us to wrap to the beginning of the log
|
||
|
* file then we know which page to check next.
|
||
|
*/
|
||
|
if (wrapped) {
|
||
|
page_cnt = 2;
|
||
|
page_pos = 1;
|
||
|
goto check_valid;
|
||
|
}
|
||
|
|
||
|
cur_pos = 2;
|
||
|
|
||
|
next_test_page:
|
||
|
kfree(tst_page);
|
||
|
tst_page = NULL;
|
||
|
|
||
|
/* Walk through the file, reading log pages. */
|
||
|
err = read_log_page(log, nextpage_off, &tst_page, &usa_error);
|
||
|
|
||
|
/*
|
||
|
* If we get a USA error then assume that we correctly found
|
||
|
* the end of the original transfer.
|
||
|
*/
|
||
|
if (usa_error)
|
||
|
goto file_is_valid;
|
||
|
|
||
|
/*
|
||
|
* If we were able to read the page, we examine it to see if it
|
||
|
* is the same or different Io block.
|
||
|
*/
|
||
|
if (err)
|
||
|
goto next_test_page_1;
|
||
|
|
||
|
if (le16_to_cpu(tst_page->page_pos) == cur_pos &&
|
||
|
check_subseq_log_page(log, tst_page, nextpage_off, expected_seq)) {
|
||
|
page_cnt = le16_to_cpu(tst_page->page_count) + 1;
|
||
|
page_pos = le16_to_cpu(tst_page->page_pos);
|
||
|
goto check_valid;
|
||
|
} else {
|
||
|
goto file_is_valid;
|
||
|
}
|
||
|
|
||
|
next_test_page_1:
|
||
|
|
||
|
nextpage_off = next_page_off(log, curpage_off);
|
||
|
wrapped = nextpage_off == log->first_page;
|
||
|
|
||
|
if (wrapped) {
|
||
|
expected_seq += 1;
|
||
|
page_cnt = 2;
|
||
|
page_pos = 1;
|
||
|
}
|
||
|
|
||
|
cur_pos += 1;
|
||
|
part_io_count += 1;
|
||
|
if (!wrapped)
|
||
|
goto next_test_page;
|
||
|
|
||
|
check_valid:
|
||
|
/* Skip over the remaining pages this transfer. */
|
||
|
remain_pages = page_cnt - page_pos - 1;
|
||
|
part_io_count += remain_pages;
|
||
|
|
||
|
while (remain_pages--) {
|
||
|
nextpage_off = next_page_off(log, curpage_off);
|
||
|
wrapped = nextpage_off == log->first_page;
|
||
|
|
||
|
if (wrapped)
|
||
|
expected_seq += 1;
|
||
|
}
|
||
|
|
||
|
/* Call our routine to check this log page. */
|
||
|
kfree(tst_page);
|
||
|
tst_page = NULL;
|
||
|
|
||
|
err = read_log_page(log, nextpage_off, &tst_page, &usa_error);
|
||
|
if (!err && !usa_error &&
|
||
|
check_subseq_log_page(log, tst_page, nextpage_off, expected_seq)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
file_is_valid:
|
||
|
|
||
|
/* We have a valid file. */
|
||
|
if (page_off1 || tail_page) {
|
||
|
struct RECORD_PAGE_HDR *tmp_page;
|
||
|
|
||
|
if (sb_rdonly(log->ni->mi.sbi->sb)) {
|
||
|
err = -EROFS;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (page_off1) {
|
||
|
tmp_page = Add2Ptr(page_bufs, page_off1 - page_off);
|
||
|
tails -= (page_off1 - page_off) / log->page_size;
|
||
|
if (!tail_page)
|
||
|
tails -= 1;
|
||
|
} else {
|
||
|
tmp_page = tail_page;
|
||
|
tails = 1;
|
||
|
}
|
||
|
|
||
|
while (tails--) {
|
||
|
u64 off = hdr_file_off(log, tmp_page);
|
||
|
|
||
|
if (!page) {
|
||
|
page = kmalloc(log->page_size, GFP_NOFS);
|
||
|
if (!page)
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Correct page and copy the data from this page
|
||
|
* into it and flush it to disk.
|
||
|
*/
|
||
|
memcpy(page, tmp_page, log->page_size);
|
||
|
|
||
|
/* Fill last flushed lsn value flush the page. */
|
||
|
if (log->major_ver < 2)
|
||
|
page->rhdr.lsn = page->record_hdr.last_end_lsn;
|
||
|
else
|
||
|
page->file_off = 0;
|
||
|
|
||
|
page->page_pos = page->page_count = cpu_to_le16(1);
|
||
|
|
||
|
ntfs_fix_pre_write(&page->rhdr, log->page_size);
|
||
|
|
||
|
err = ntfs_sb_write_run(log->ni->mi.sbi,
|
||
|
&log->ni->file.run, off, page,
|
||
|
log->page_size, 0);
|
||
|
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
if (part_io_count && second_off == off) {
|
||
|
second_off += log->page_size;
|
||
|
part_io_count -= 1;
|
||
|
}
|
||
|
|
||
|
tmp_page = Add2Ptr(tmp_page, log->page_size);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (part_io_count) {
|
||
|
if (sb_rdonly(log->ni->mi.sbi->sb)) {
|
||
|
err = -EROFS;
|
||
|
goto out;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
out:
|
||
|
kfree(second_tail);
|
||
|
kfree(first_tail);
|
||
|
kfree(page);
|
||
|
kfree(tst_page);
|
||
|
kfree(page_bufs);
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* read_log_rec_buf - Copy a log record from the file to a buffer.
|
||
|
*
|
||
|
* The log record may span several log pages and may even wrap the file.
|
||
|
*/
|
||
|
static int read_log_rec_buf(struct ntfs_log *log,
|
||
|
const struct LFS_RECORD_HDR *rh, void *buffer)
|
||
|
{
|
||
|
int err;
|
||
|
struct RECORD_PAGE_HDR *ph = NULL;
|
||
|
u64 lsn = le64_to_cpu(rh->this_lsn);
|
||
|
u32 vbo = lsn_to_vbo(log, lsn) & ~log->page_mask;
|
||
|
u32 off = lsn_to_page_off(log, lsn) + log->record_header_len;
|
||
|
u32 data_len = le32_to_cpu(rh->client_data_len);
|
||
|
|
||
|
/*
|
||
|
* While there are more bytes to transfer,
|
||
|
* we continue to attempt to perform the read.
|
||
|
*/
|
||
|
for (;;) {
|
||
|
bool usa_error;
|
||
|
u32 tail = log->page_size - off;
|
||
|
|
||
|
if (tail >= data_len)
|
||
|
tail = data_len;
|
||
|
|
||
|
data_len -= tail;
|
||
|
|
||
|
err = read_log_page(log, vbo, &ph, &usa_error);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
/*
|
||
|
* The last lsn on this page better be greater or equal
|
||
|
* to the lsn we are copying.
|
||
|
*/
|
||
|
if (lsn > le64_to_cpu(ph->rhdr.lsn)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
memcpy(buffer, Add2Ptr(ph, off), tail);
|
||
|
|
||
|
/* If there are no more bytes to transfer, we exit the loop. */
|
||
|
if (!data_len) {
|
||
|
if (!is_log_record_end(ph) ||
|
||
|
lsn > le64_to_cpu(ph->record_hdr.last_end_lsn)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (ph->rhdr.lsn == ph->record_hdr.last_end_lsn ||
|
||
|
lsn > le64_to_cpu(ph->rhdr.lsn)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
vbo = next_page_off(log, vbo);
|
||
|
off = log->data_off;
|
||
|
|
||
|
/*
|
||
|
* Adjust our pointer the user's buffer to transfer
|
||
|
* the next block to.
|
||
|
*/
|
||
|
buffer = Add2Ptr(buffer, tail);
|
||
|
}
|
||
|
|
||
|
out:
|
||
|
kfree(ph);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int read_rst_area(struct ntfs_log *log, struct NTFS_RESTART **rst_,
|
||
|
u64 *lsn)
|
||
|
{
|
||
|
int err;
|
||
|
struct LFS_RECORD_HDR *rh = NULL;
|
||
|
const struct CLIENT_REC *cr =
|
||
|
Add2Ptr(log->ra, le16_to_cpu(log->ra->client_off));
|
||
|
u64 lsnr, lsnc = le64_to_cpu(cr->restart_lsn);
|
||
|
u32 len;
|
||
|
struct NTFS_RESTART *rst;
|
||
|
|
||
|
*lsn = 0;
|
||
|
*rst_ = NULL;
|
||
|
|
||
|
/* If the client doesn't have a restart area, go ahead and exit now. */
|
||
|
if (!lsnc)
|
||
|
return 0;
|
||
|
|
||
|
err = read_log_page(log, lsn_to_vbo(log, lsnc),
|
||
|
(struct RECORD_PAGE_HDR **)&rh, NULL);
|
||
|
if (err)
|
||
|
return err;
|
||
|
|
||
|
rst = NULL;
|
||
|
lsnr = le64_to_cpu(rh->this_lsn);
|
||
|
|
||
|
if (lsnc != lsnr) {
|
||
|
/* If the lsn values don't match, then the disk is corrupt. */
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
*lsn = lsnr;
|
||
|
len = le32_to_cpu(rh->client_data_len);
|
||
|
|
||
|
if (!len) {
|
||
|
err = 0;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (len < sizeof(struct NTFS_RESTART)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
rst = kmalloc(len, GFP_NOFS);
|
||
|
if (!rst) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* Copy the data into the 'rst' buffer. */
|
||
|
err = read_log_rec_buf(log, rh, rst);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
*rst_ = rst;
|
||
|
rst = NULL;
|
||
|
|
||
|
out:
|
||
|
kfree(rh);
|
||
|
kfree(rst);
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int find_log_rec(struct ntfs_log *log, u64 lsn, struct lcb *lcb)
|
||
|
{
|
||
|
int err;
|
||
|
struct LFS_RECORD_HDR *rh = lcb->lrh;
|
||
|
u32 rec_len, len;
|
||
|
|
||
|
/* Read the record header for this lsn. */
|
||
|
if (!rh) {
|
||
|
err = read_log_page(log, lsn_to_vbo(log, lsn),
|
||
|
(struct RECORD_PAGE_HDR **)&rh, NULL);
|
||
|
|
||
|
lcb->lrh = rh;
|
||
|
if (err)
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If the lsn the log record doesn't match the desired
|
||
|
* lsn then the disk is corrupt.
|
||
|
*/
|
||
|
if (lsn != le64_to_cpu(rh->this_lsn))
|
||
|
return -EINVAL;
|
||
|
|
||
|
len = le32_to_cpu(rh->client_data_len);
|
||
|
|
||
|
/*
|
||
|
* Check that the length field isn't greater than the total
|
||
|
* available space the log file.
|
||
|
*/
|
||
|
rec_len = len + log->record_header_len;
|
||
|
if (rec_len >= log->total_avail)
|
||
|
return -EINVAL;
|
||
|
|
||
|
/*
|
||
|
* If the entire log record is on this log page,
|
||
|
* put a pointer to the log record the context block.
|
||
|
*/
|
||
|
if (rh->flags & LOG_RECORD_MULTI_PAGE) {
|
||
|
void *lr = kmalloc(len, GFP_NOFS);
|
||
|
|
||
|
if (!lr)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
lcb->log_rec = lr;
|
||
|
lcb->alloc = true;
|
||
|
|
||
|
/* Copy the data into the buffer returned. */
|
||
|
err = read_log_rec_buf(log, rh, lr);
|
||
|
if (err)
|
||
|
return err;
|
||
|
} else {
|
||
|
/* If beyond the end of the current page -> an error. */
|
||
|
u32 page_off = lsn_to_page_off(log, lsn);
|
||
|
|
||
|
if (page_off + len + log->record_header_len > log->page_size)
|
||
|
return -EINVAL;
|
||
|
|
||
|
lcb->log_rec = Add2Ptr(rh, sizeof(struct LFS_RECORD_HDR));
|
||
|
lcb->alloc = false;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* read_log_rec_lcb - Init the query operation.
|
||
|
*/
|
||
|
static int read_log_rec_lcb(struct ntfs_log *log, u64 lsn, u32 ctx_mode,
|
||
|
struct lcb **lcb_)
|
||
|
{
|
||
|
int err;
|
||
|
const struct CLIENT_REC *cr;
|
||
|
struct lcb *lcb;
|
||
|
|
||
|
switch (ctx_mode) {
|
||
|
case lcb_ctx_undo_next:
|
||
|
case lcb_ctx_prev:
|
||
|
case lcb_ctx_next:
|
||
|
break;
|
||
|
default:
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
/* Check that the given lsn is the legal range for this client. */
|
||
|
cr = Add2Ptr(log->ra, le16_to_cpu(log->ra->client_off));
|
||
|
|
||
|
if (!verify_client_lsn(log, cr, lsn))
|
||
|
return -EINVAL;
|
||
|
|
||
|
lcb = kzalloc(sizeof(struct lcb), GFP_NOFS);
|
||
|
if (!lcb)
|
||
|
return -ENOMEM;
|
||
|
lcb->client = log->client_id;
|
||
|
lcb->ctx_mode = ctx_mode;
|
||
|
|
||
|
/* Find the log record indicated by the given lsn. */
|
||
|
err = find_log_rec(log, lsn, lcb);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
*lcb_ = lcb;
|
||
|
return 0;
|
||
|
|
||
|
out:
|
||
|
lcb_put(lcb);
|
||
|
*lcb_ = NULL;
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* find_client_next_lsn
|
||
|
*
|
||
|
* Attempt to find the next lsn to return to a client based on the context mode.
|
||
|
*/
|
||
|
static int find_client_next_lsn(struct ntfs_log *log, struct lcb *lcb, u64 *lsn)
|
||
|
{
|
||
|
int err;
|
||
|
u64 next_lsn;
|
||
|
struct LFS_RECORD_HDR *hdr;
|
||
|
|
||
|
hdr = lcb->lrh;
|
||
|
*lsn = 0;
|
||
|
|
||
|
if (lcb_ctx_next != lcb->ctx_mode)
|
||
|
goto check_undo_next;
|
||
|
|
||
|
/* Loop as long as another lsn can be found. */
|
||
|
for (;;) {
|
||
|
u64 current_lsn;
|
||
|
|
||
|
err = next_log_lsn(log, hdr, ¤t_lsn);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
if (!current_lsn)
|
||
|
break;
|
||
|
|
||
|
if (hdr != lcb->lrh)
|
||
|
kfree(hdr);
|
||
|
|
||
|
hdr = NULL;
|
||
|
err = read_log_page(log, lsn_to_vbo(log, current_lsn),
|
||
|
(struct RECORD_PAGE_HDR **)&hdr, NULL);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
if (memcmp(&hdr->client, &lcb->client,
|
||
|
sizeof(struct CLIENT_ID))) {
|
||
|
/*err = -EINVAL; */
|
||
|
} else if (LfsClientRecord == hdr->record_type) {
|
||
|
kfree(lcb->lrh);
|
||
|
lcb->lrh = hdr;
|
||
|
*lsn = current_lsn;
|
||
|
return 0;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
out:
|
||
|
if (hdr != lcb->lrh)
|
||
|
kfree(hdr);
|
||
|
return err;
|
||
|
|
||
|
check_undo_next:
|
||
|
if (lcb_ctx_undo_next == lcb->ctx_mode)
|
||
|
next_lsn = le64_to_cpu(hdr->client_undo_next_lsn);
|
||
|
else if (lcb_ctx_prev == lcb->ctx_mode)
|
||
|
next_lsn = le64_to_cpu(hdr->client_prev_lsn);
|
||
|
else
|
||
|
return 0;
|
||
|
|
||
|
if (!next_lsn)
|
||
|
return 0;
|
||
|
|
||
|
if (!verify_client_lsn(
|
||
|
log, Add2Ptr(log->ra, le16_to_cpu(log->ra->client_off)),
|
||
|
next_lsn))
|
||
|
return 0;
|
||
|
|
||
|
hdr = NULL;
|
||
|
err = read_log_page(log, lsn_to_vbo(log, next_lsn),
|
||
|
(struct RECORD_PAGE_HDR **)&hdr, NULL);
|
||
|
if (err)
|
||
|
return err;
|
||
|
kfree(lcb->lrh);
|
||
|
lcb->lrh = hdr;
|
||
|
|
||
|
*lsn = next_lsn;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int read_next_log_rec(struct ntfs_log *log, struct lcb *lcb, u64 *lsn)
|
||
|
{
|
||
|
int err;
|
||
|
|
||
|
err = find_client_next_lsn(log, lcb, lsn);
|
||
|
if (err)
|
||
|
return err;
|
||
|
|
||
|
if (!*lsn)
|
||
|
return 0;
|
||
|
|
||
|
if (lcb->alloc)
|
||
|
kfree(lcb->log_rec);
|
||
|
|
||
|
lcb->log_rec = NULL;
|
||
|
lcb->alloc = false;
|
||
|
kfree(lcb->lrh);
|
||
|
lcb->lrh = NULL;
|
||
|
|
||
|
return find_log_rec(log, *lsn, lcb);
|
||
|
}
|
||
|
|
||
|
bool check_index_header(const struct INDEX_HDR *hdr, size_t bytes)
|
||
|
{
|
||
|
__le16 mask;
|
||
|
u32 min_de, de_off, used, total;
|
||
|
const struct NTFS_DE *e;
|
||
|
|
||
|
if (hdr_has_subnode(hdr)) {
|
||
|
min_de = sizeof(struct NTFS_DE) + sizeof(u64);
|
||
|
mask = NTFS_IE_HAS_SUBNODES;
|
||
|
} else {
|
||
|
min_de = sizeof(struct NTFS_DE);
|
||
|
mask = 0;
|
||
|
}
|
||
|
|
||
|
de_off = le32_to_cpu(hdr->de_off);
|
||
|
used = le32_to_cpu(hdr->used);
|
||
|
total = le32_to_cpu(hdr->total);
|
||
|
|
||
|
if (de_off > bytes - min_de || used > bytes || total > bytes ||
|
||
|
de_off + min_de > used || used > total) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
e = Add2Ptr(hdr, de_off);
|
||
|
for (;;) {
|
||
|
u16 esize = le16_to_cpu(e->size);
|
||
|
struct NTFS_DE *next = Add2Ptr(e, esize);
|
||
|
|
||
|
if (esize < min_de || PtrOffset(hdr, next) > used ||
|
||
|
(e->flags & NTFS_IE_HAS_SUBNODES) != mask) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if (de_is_last(e))
|
||
|
break;
|
||
|
|
||
|
e = next;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static inline bool check_index_buffer(const struct INDEX_BUFFER *ib, u32 bytes)
|
||
|
{
|
||
|
u16 fo;
|
||
|
const struct NTFS_RECORD_HEADER *r = &ib->rhdr;
|
||
|
|
||
|
if (r->sign != NTFS_INDX_SIGNATURE)
|
||
|
return false;
|
||
|
|
||
|
fo = (SECTOR_SIZE - ((bytes >> SECTOR_SHIFT) + 1) * sizeof(short));
|
||
|
|
||
|
if (le16_to_cpu(r->fix_off) > fo)
|
||
|
return false;
|
||
|
|
||
|
if ((le16_to_cpu(r->fix_num) - 1) * SECTOR_SIZE != bytes)
|
||
|
return false;
|
||
|
|
||
|
return check_index_header(&ib->ihdr,
|
||
|
bytes - offsetof(struct INDEX_BUFFER, ihdr));
|
||
|
}
|
||
|
|
||
|
static inline bool check_index_root(const struct ATTRIB *attr,
|
||
|
struct ntfs_sb_info *sbi)
|
||
|
{
|
||
|
bool ret;
|
||
|
const struct INDEX_ROOT *root = resident_data(attr);
|
||
|
u8 index_bits = le32_to_cpu(root->index_block_size) >= sbi->cluster_size
|
||
|
? sbi->cluster_bits
|
||
|
: SECTOR_SHIFT;
|
||
|
u8 block_clst = root->index_block_clst;
|
||
|
|
||
|
if (le32_to_cpu(attr->res.data_size) < sizeof(struct INDEX_ROOT) ||
|
||
|
(root->type != ATTR_NAME && root->type != ATTR_ZERO) ||
|
||
|
(root->type == ATTR_NAME &&
|
||
|
root->rule != NTFS_COLLATION_TYPE_FILENAME) ||
|
||
|
(le32_to_cpu(root->index_block_size) !=
|
||
|
(block_clst << index_bits)) ||
|
||
|
(block_clst != 1 && block_clst != 2 && block_clst != 4 &&
|
||
|
block_clst != 8 && block_clst != 0x10 && block_clst != 0x20 &&
|
||
|
block_clst != 0x40 && block_clst != 0x80)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
ret = check_index_header(&root->ihdr,
|
||
|
le32_to_cpu(attr->res.data_size) -
|
||
|
offsetof(struct INDEX_ROOT, ihdr));
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static inline bool check_attr(const struct MFT_REC *rec,
|
||
|
const struct ATTRIB *attr,
|
||
|
struct ntfs_sb_info *sbi)
|
||
|
{
|
||
|
u32 asize = le32_to_cpu(attr->size);
|
||
|
u32 rsize = 0;
|
||
|
u64 dsize, svcn, evcn;
|
||
|
u16 run_off;
|
||
|
|
||
|
/* Check the fixed part of the attribute record header. */
|
||
|
if (asize >= sbi->record_size ||
|
||
|
asize + PtrOffset(rec, attr) >= sbi->record_size ||
|
||
|
(attr->name_len &&
|
||
|
le16_to_cpu(attr->name_off) + attr->name_len * sizeof(short) >
|
||
|
asize)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
/* Check the attribute fields. */
|
||
|
switch (attr->non_res) {
|
||
|
case 0:
|
||
|
rsize = le32_to_cpu(attr->res.data_size);
|
||
|
if (rsize >= asize ||
|
||
|
le16_to_cpu(attr->res.data_off) + rsize > asize) {
|
||
|
return false;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case 1:
|
||
|
dsize = le64_to_cpu(attr->nres.data_size);
|
||
|
svcn = le64_to_cpu(attr->nres.svcn);
|
||
|
evcn = le64_to_cpu(attr->nres.evcn);
|
||
|
run_off = le16_to_cpu(attr->nres.run_off);
|
||
|
|
||
|
if (svcn > evcn + 1 || run_off >= asize ||
|
||
|
le64_to_cpu(attr->nres.valid_size) > dsize ||
|
||
|
dsize > le64_to_cpu(attr->nres.alloc_size)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if (run_off > asize)
|
||
|
return false;
|
||
|
|
||
|
if (run_unpack(NULL, sbi, 0, svcn, evcn, svcn,
|
||
|
Add2Ptr(attr, run_off), asize - run_off) < 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
|
||
|
default:
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
switch (attr->type) {
|
||
|
case ATTR_NAME:
|
||
|
if (fname_full_size(Add2Ptr(
|
||
|
attr, le16_to_cpu(attr->res.data_off))) > asize) {
|
||
|
return false;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case ATTR_ROOT:
|
||
|
return check_index_root(attr, sbi);
|
||
|
|
||
|
case ATTR_STD:
|
||
|
if (rsize < sizeof(struct ATTR_STD_INFO5) &&
|
||
|
rsize != sizeof(struct ATTR_STD_INFO)) {
|
||
|
return false;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case ATTR_LIST:
|
||
|
case ATTR_ID:
|
||
|
case ATTR_SECURE:
|
||
|
case ATTR_LABEL:
|
||
|
case ATTR_VOL_INFO:
|
||
|
case ATTR_DATA:
|
||
|
case ATTR_ALLOC:
|
||
|
case ATTR_BITMAP:
|
||
|
case ATTR_REPARSE:
|
||
|
case ATTR_EA_INFO:
|
||
|
case ATTR_EA:
|
||
|
case ATTR_PROPERTYSET:
|
||
|
case ATTR_LOGGED_UTILITY_STREAM:
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static inline bool check_file_record(const struct MFT_REC *rec,
|
||
|
const struct MFT_REC *rec2,
|
||
|
struct ntfs_sb_info *sbi)
|
||
|
{
|
||
|
const struct ATTRIB *attr;
|
||
|
u16 fo = le16_to_cpu(rec->rhdr.fix_off);
|
||
|
u16 fn = le16_to_cpu(rec->rhdr.fix_num);
|
||
|
u16 ao = le16_to_cpu(rec->attr_off);
|
||
|
u32 rs = sbi->record_size;
|
||
|
|
||
|
/* Check the file record header for consistency. */
|
||
|
if (rec->rhdr.sign != NTFS_FILE_SIGNATURE ||
|
||
|
fo > (SECTOR_SIZE - ((rs >> SECTOR_SHIFT) + 1) * sizeof(short)) ||
|
||
|
(fn - 1) * SECTOR_SIZE != rs || ao < MFTRECORD_FIXUP_OFFSET_1 ||
|
||
|
ao > sbi->record_size - SIZEOF_RESIDENT || !is_rec_inuse(rec) ||
|
||
|
le32_to_cpu(rec->total) != rs) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
/* Loop to check all of the attributes. */
|
||
|
for (attr = Add2Ptr(rec, ao); attr->type != ATTR_END;
|
||
|
attr = Add2Ptr(attr, le32_to_cpu(attr->size))) {
|
||
|
if (check_attr(rec, attr, sbi))
|
||
|
continue;
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static inline int check_lsn(const struct NTFS_RECORD_HEADER *hdr,
|
||
|
const u64 *rlsn)
|
||
|
{
|
||
|
u64 lsn;
|
||
|
|
||
|
if (!rlsn)
|
||
|
return true;
|
||
|
|
||
|
lsn = le64_to_cpu(hdr->lsn);
|
||
|
|
||
|
if (hdr->sign == NTFS_HOLE_SIGNATURE)
|
||
|
return false;
|
||
|
|
||
|
if (*rlsn > lsn)
|
||
|
return true;
|
||
|
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
static inline bool check_if_attr(const struct MFT_REC *rec,
|
||
|
const struct LOG_REC_HDR *lrh)
|
||
|
{
|
||
|
u16 ro = le16_to_cpu(lrh->record_off);
|
||
|
u16 o = le16_to_cpu(rec->attr_off);
|
||
|
const struct ATTRIB *attr = Add2Ptr(rec, o);
|
||
|
|
||
|
while (o < ro) {
|
||
|
u32 asize;
|
||
|
|
||
|
if (attr->type == ATTR_END)
|
||
|
break;
|
||
|
|
||
|
asize = le32_to_cpu(attr->size);
|
||
|
if (!asize)
|
||
|
break;
|
||
|
|
||
|
o += asize;
|
||
|
attr = Add2Ptr(attr, asize);
|
||
|
}
|
||
|
|
||
|
return o == ro;
|
||
|
}
|
||
|
|
||
|
static inline bool check_if_index_root(const struct MFT_REC *rec,
|
||
|
const struct LOG_REC_HDR *lrh)
|
||
|
{
|
||
|
u16 ro = le16_to_cpu(lrh->record_off);
|
||
|
u16 o = le16_to_cpu(rec->attr_off);
|
||
|
const struct ATTRIB *attr = Add2Ptr(rec, o);
|
||
|
|
||
|
while (o < ro) {
|
||
|
u32 asize;
|
||
|
|
||
|
if (attr->type == ATTR_END)
|
||
|
break;
|
||
|
|
||
|
asize = le32_to_cpu(attr->size);
|
||
|
if (!asize)
|
||
|
break;
|
||
|
|
||
|
o += asize;
|
||
|
attr = Add2Ptr(attr, asize);
|
||
|
}
|
||
|
|
||
|
return o == ro && attr->type == ATTR_ROOT;
|
||
|
}
|
||
|
|
||
|
static inline bool check_if_root_index(const struct ATTRIB *attr,
|
||
|
const struct INDEX_HDR *hdr,
|
||
|
const struct LOG_REC_HDR *lrh)
|
||
|
{
|
||
|
u16 ao = le16_to_cpu(lrh->attr_off);
|
||
|
u32 de_off = le32_to_cpu(hdr->de_off);
|
||
|
u32 o = PtrOffset(attr, hdr) + de_off;
|
||
|
const struct NTFS_DE *e = Add2Ptr(hdr, de_off);
|
||
|
u32 asize = le32_to_cpu(attr->size);
|
||
|
|
||
|
while (o < ao) {
|
||
|
u16 esize;
|
||
|
|
||
|
if (o >= asize)
|
||
|
break;
|
||
|
|
||
|
esize = le16_to_cpu(e->size);
|
||
|
if (!esize)
|
||
|
break;
|
||
|
|
||
|
o += esize;
|
||
|
e = Add2Ptr(e, esize);
|
||
|
}
|
||
|
|
||
|
return o == ao;
|
||
|
}
|
||
|
|
||
|
static inline bool check_if_alloc_index(const struct INDEX_HDR *hdr,
|
||
|
u32 attr_off)
|
||
|
{
|
||
|
u32 de_off = le32_to_cpu(hdr->de_off);
|
||
|
u32 o = offsetof(struct INDEX_BUFFER, ihdr) + de_off;
|
||
|
const struct NTFS_DE *e = Add2Ptr(hdr, de_off);
|
||
|
u32 used = le32_to_cpu(hdr->used);
|
||
|
|
||
|
while (o < attr_off) {
|
||
|
u16 esize;
|
||
|
|
||
|
if (de_off >= used)
|
||
|
break;
|
||
|
|
||
|
esize = le16_to_cpu(e->size);
|
||
|
if (!esize)
|
||
|
break;
|
||
|
|
||
|
o += esize;
|
||
|
de_off += esize;
|
||
|
e = Add2Ptr(e, esize);
|
||
|
}
|
||
|
|
||
|
return o == attr_off;
|
||
|
}
|
||
|
|
||
|
static inline void change_attr_size(struct MFT_REC *rec, struct ATTRIB *attr,
|
||
|
u32 nsize)
|
||
|
{
|
||
|
u32 asize = le32_to_cpu(attr->size);
|
||
|
int dsize = nsize - asize;
|
||
|
u8 *next = Add2Ptr(attr, asize);
|
||
|
u32 used = le32_to_cpu(rec->used);
|
||
|
|
||
|
memmove(Add2Ptr(attr, nsize), next, used - PtrOffset(rec, next));
|
||
|
|
||
|
rec->used = cpu_to_le32(used + dsize);
|
||
|
attr->size = cpu_to_le32(nsize);
|
||
|
}
|
||
|
|
||
|
struct OpenAttr {
|
||
|
struct ATTRIB *attr;
|
||
|
struct runs_tree *run1;
|
||
|
struct runs_tree run0;
|
||
|
struct ntfs_inode *ni;
|
||
|
// CLST rno;
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* cmp_type_and_name
|
||
|
*
|
||
|
* Return: 0 if 'attr' has the same type and name.
|
||
|
*/
|
||
|
static inline int cmp_type_and_name(const struct ATTRIB *a1,
|
||
|
const struct ATTRIB *a2)
|
||
|
{
|
||
|
return a1->type != a2->type || a1->name_len != a2->name_len ||
|
||
|
(a1->name_len && memcmp(attr_name(a1), attr_name(a2),
|
||
|
a1->name_len * sizeof(short)));
|
||
|
}
|
||
|
|
||
|
static struct OpenAttr *find_loaded_attr(struct ntfs_log *log,
|
||
|
const struct ATTRIB *attr, CLST rno)
|
||
|
{
|
||
|
struct OPEN_ATTR_ENRTY *oe = NULL;
|
||
|
|
||
|
while ((oe = enum_rstbl(log->open_attr_tbl, oe))) {
|
||
|
struct OpenAttr *op_attr;
|
||
|
|
||
|
if (ino_get(&oe->ref) != rno)
|
||
|
continue;
|
||
|
|
||
|
op_attr = (struct OpenAttr *)oe->ptr;
|
||
|
if (!cmp_type_and_name(op_attr->attr, attr))
|
||
|
return op_attr;
|
||
|
}
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
static struct ATTRIB *attr_create_nonres_log(struct ntfs_sb_info *sbi,
|
||
|
enum ATTR_TYPE type, u64 size,
|
||
|
const u16 *name, size_t name_len,
|
||
|
__le16 flags)
|
||
|
{
|
||
|
struct ATTRIB *attr;
|
||
|
u32 name_size = ALIGN(name_len * sizeof(short), 8);
|
||
|
bool is_ext = flags & (ATTR_FLAG_COMPRESSED | ATTR_FLAG_SPARSED);
|
||
|
u32 asize = name_size +
|
||
|
(is_ext ? SIZEOF_NONRESIDENT_EX : SIZEOF_NONRESIDENT);
|
||
|
|
||
|
attr = kzalloc(asize, GFP_NOFS);
|
||
|
if (!attr)
|
||
|
return NULL;
|
||
|
|
||
|
attr->type = type;
|
||
|
attr->size = cpu_to_le32(asize);
|
||
|
attr->flags = flags;
|
||
|
attr->non_res = 1;
|
||
|
attr->name_len = name_len;
|
||
|
|
||
|
attr->nres.evcn = cpu_to_le64((u64)bytes_to_cluster(sbi, size) - 1);
|
||
|
attr->nres.alloc_size = cpu_to_le64(ntfs_up_cluster(sbi, size));
|
||
|
attr->nres.data_size = cpu_to_le64(size);
|
||
|
attr->nres.valid_size = attr->nres.data_size;
|
||
|
if (is_ext) {
|
||
|
attr->name_off = SIZEOF_NONRESIDENT_EX_LE;
|
||
|
if (is_attr_compressed(attr))
|
||
|
attr->nres.c_unit = COMPRESSION_UNIT;
|
||
|
|
||
|
attr->nres.run_off =
|
||
|
cpu_to_le16(SIZEOF_NONRESIDENT_EX + name_size);
|
||
|
memcpy(Add2Ptr(attr, SIZEOF_NONRESIDENT_EX), name,
|
||
|
name_len * sizeof(short));
|
||
|
} else {
|
||
|
attr->name_off = SIZEOF_NONRESIDENT_LE;
|
||
|
attr->nres.run_off =
|
||
|
cpu_to_le16(SIZEOF_NONRESIDENT + name_size);
|
||
|
memcpy(Add2Ptr(attr, SIZEOF_NONRESIDENT), name,
|
||
|
name_len * sizeof(short));
|
||
|
}
|
||
|
|
||
|
return attr;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* do_action - Common routine for the Redo and Undo Passes.
|
||
|
* @rlsn: If it is NULL then undo.
|
||
|
*/
|
||
|
static int do_action(struct ntfs_log *log, struct OPEN_ATTR_ENRTY *oe,
|
||
|
const struct LOG_REC_HDR *lrh, u32 op, void *data,
|
||
|
u32 dlen, u32 rec_len, const u64 *rlsn)
|
||
|
{
|
||
|
int err = 0;
|
||
|
struct ntfs_sb_info *sbi = log->ni->mi.sbi;
|
||
|
struct inode *inode = NULL, *inode_parent;
|
||
|
struct mft_inode *mi = NULL, *mi2_child = NULL;
|
||
|
CLST rno = 0, rno_base = 0;
|
||
|
struct INDEX_BUFFER *ib = NULL;
|
||
|
struct MFT_REC *rec = NULL;
|
||
|
struct ATTRIB *attr = NULL, *attr2;
|
||
|
struct INDEX_HDR *hdr;
|
||
|
struct INDEX_ROOT *root;
|
||
|
struct NTFS_DE *e, *e1, *e2;
|
||
|
struct NEW_ATTRIBUTE_SIZES *new_sz;
|
||
|
struct ATTR_FILE_NAME *fname;
|
||
|
struct OpenAttr *oa, *oa2;
|
||
|
u32 nsize, t32, asize, used, esize, bmp_off, bmp_bits;
|
||
|
u16 id, id2;
|
||
|
u32 record_size = sbi->record_size;
|
||
|
u64 t64;
|
||
|
u16 roff = le16_to_cpu(lrh->record_off);
|
||
|
u16 aoff = le16_to_cpu(lrh->attr_off);
|
||
|
u64 lco = 0;
|
||
|
u64 cbo = (u64)le16_to_cpu(lrh->cluster_off) << SECTOR_SHIFT;
|
||
|
u64 tvo = le64_to_cpu(lrh->target_vcn) << sbi->cluster_bits;
|
||
|
u64 vbo = cbo + tvo;
|
||
|
void *buffer_le = NULL;
|
||
|
u32 bytes = 0;
|
||
|
bool a_dirty = false;
|
||
|
u16 data_off;
|
||
|
|
||
|
oa = oe->ptr;
|
||
|
|
||
|
/* Big switch to prepare. */
|
||
|
switch (op) {
|
||
|
/* ============================================================
|
||
|
* Process MFT records, as described by the current log record.
|
||
|
* ============================================================
|
||
|
*/
|
||
|
case InitializeFileRecordSegment:
|
||
|
case DeallocateFileRecordSegment:
|
||
|
case WriteEndOfFileRecordSegment:
|
||
|
case CreateAttribute:
|
||
|
case DeleteAttribute:
|
||
|
case UpdateResidentValue:
|
||
|
case UpdateMappingPairs:
|
||
|
case SetNewAttributeSizes:
|
||
|
case AddIndexEntryRoot:
|
||
|
case DeleteIndexEntryRoot:
|
||
|
case SetIndexEntryVcnRoot:
|
||
|
case UpdateFileNameRoot:
|
||
|
case UpdateRecordDataRoot:
|
||
|
case ZeroEndOfFileRecord:
|
||
|
rno = vbo >> sbi->record_bits;
|
||
|
inode = ilookup(sbi->sb, rno);
|
||
|
if (inode) {
|
||
|
mi = &ntfs_i(inode)->mi;
|
||
|
} else if (op == InitializeFileRecordSegment) {
|
||
|
mi = kzalloc(sizeof(struct mft_inode), GFP_NOFS);
|
||
|
if (!mi)
|
||
|
return -ENOMEM;
|
||
|
err = mi_format_new(mi, sbi, rno, 0, false);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
} else {
|
||
|
/* Read from disk. */
|
||
|
err = mi_get(sbi, rno, &mi);
|
||
|
if (err)
|
||
|
return err;
|
||
|
}
|
||
|
rec = mi->mrec;
|
||
|
|
||
|
if (op == DeallocateFileRecordSegment)
|
||
|
goto skip_load_parent;
|
||
|
|
||
|
if (InitializeFileRecordSegment != op) {
|
||
|
if (rec->rhdr.sign == NTFS_BAAD_SIGNATURE)
|
||
|
goto dirty_vol;
|
||
|
if (!check_lsn(&rec->rhdr, rlsn))
|
||
|
goto out;
|
||
|
if (!check_file_record(rec, NULL, sbi))
|
||
|
goto dirty_vol;
|
||
|
attr = Add2Ptr(rec, roff);
|
||
|
}
|
||
|
|
||
|
if (is_rec_base(rec) || InitializeFileRecordSegment == op) {
|
||
|
rno_base = rno;
|
||
|
goto skip_load_parent;
|
||
|
}
|
||
|
|
||
|
rno_base = ino_get(&rec->parent_ref);
|
||
|
inode_parent = ntfs_iget5(sbi->sb, &rec->parent_ref, NULL);
|
||
|
if (IS_ERR(inode_parent))
|
||
|
goto skip_load_parent;
|
||
|
|
||
|
if (is_bad_inode(inode_parent)) {
|
||
|
iput(inode_parent);
|
||
|
goto skip_load_parent;
|
||
|
}
|
||
|
|
||
|
if (ni_load_mi_ex(ntfs_i(inode_parent), rno, &mi2_child)) {
|
||
|
iput(inode_parent);
|
||
|
} else {
|
||
|
if (mi2_child->mrec != mi->mrec)
|
||
|
memcpy(mi2_child->mrec, mi->mrec,
|
||
|
sbi->record_size);
|
||
|
|
||
|
if (inode)
|
||
|
iput(inode);
|
||
|
else if (mi)
|
||
|
mi_put(mi);
|
||
|
|
||
|
inode = inode_parent;
|
||
|
mi = mi2_child;
|
||
|
rec = mi2_child->mrec;
|
||
|
attr = Add2Ptr(rec, roff);
|
||
|
}
|
||
|
|
||
|
skip_load_parent:
|
||
|
inode_parent = NULL;
|
||
|
break;
|
||
|
|
||
|
/*
|
||
|
* Process attributes, as described by the current log record.
|
||
|
*/
|
||
|
case UpdateNonresidentValue:
|
||
|
case AddIndexEntryAllocation:
|
||
|
case DeleteIndexEntryAllocation:
|
||
|
case WriteEndOfIndexBuffer:
|
||
|
case SetIndexEntryVcnAllocation:
|
||
|
case UpdateFileNameAllocation:
|
||
|
case SetBitsInNonresidentBitMap:
|
||
|
case ClearBitsInNonresidentBitMap:
|
||
|
case UpdateRecordDataAllocation:
|
||
|
attr = oa->attr;
|
||
|
bytes = UpdateNonresidentValue == op ? dlen : 0;
|
||
|
lco = (u64)le16_to_cpu(lrh->lcns_follow) << sbi->cluster_bits;
|
||
|
|
||
|
if (attr->type == ATTR_ALLOC) {
|
||
|
t32 = le32_to_cpu(oe->bytes_per_index);
|
||
|
if (bytes < t32)
|
||
|
bytes = t32;
|
||
|
}
|
||
|
|
||
|
if (!bytes)
|
||
|
bytes = lco - cbo;
|
||
|
|
||
|
bytes += roff;
|
||
|
if (attr->type == ATTR_ALLOC)
|
||
|
bytes = (bytes + 511) & ~511; // align
|
||
|
|
||
|
buffer_le = kmalloc(bytes, GFP_NOFS);
|
||
|
if (!buffer_le)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
err = ntfs_read_run_nb(sbi, oa->run1, vbo, buffer_le, bytes,
|
||
|
NULL);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
if (attr->type == ATTR_ALLOC && *(int *)buffer_le)
|
||
|
ntfs_fix_post_read(buffer_le, bytes, false);
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
WARN_ON(1);
|
||
|
}
|
||
|
|
||
|
/* Big switch to do operation. */
|
||
|
switch (op) {
|
||
|
case InitializeFileRecordSegment:
|
||
|
if (roff + dlen > record_size)
|
||
|
goto dirty_vol;
|
||
|
|
||
|
memcpy(Add2Ptr(rec, roff), data, dlen);
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case DeallocateFileRecordSegment:
|
||
|
clear_rec_inuse(rec);
|
||
|
le16_add_cpu(&rec->seq, 1);
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case WriteEndOfFileRecordSegment:
|
||
|
attr2 = (struct ATTRIB *)data;
|
||
|
if (!check_if_attr(rec, lrh) || roff + dlen > record_size)
|
||
|
goto dirty_vol;
|
||
|
|
||
|
memmove(attr, attr2, dlen);
|
||
|
rec->used = cpu_to_le32(ALIGN(roff + dlen, 8));
|
||
|
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case CreateAttribute:
|
||
|
attr2 = (struct ATTRIB *)data;
|
||
|
asize = le32_to_cpu(attr2->size);
|
||
|
used = le32_to_cpu(rec->used);
|
||
|
|
||
|
if (!check_if_attr(rec, lrh) || dlen < SIZEOF_RESIDENT ||
|
||
|
!IS_ALIGNED(asize, 8) ||
|
||
|
Add2Ptr(attr2, asize) > Add2Ptr(lrh, rec_len) ||
|
||
|
dlen > record_size - used) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
memmove(Add2Ptr(attr, asize), attr, used - roff);
|
||
|
memcpy(attr, attr2, asize);
|
||
|
|
||
|
rec->used = cpu_to_le32(used + asize);
|
||
|
id = le16_to_cpu(rec->next_attr_id);
|
||
|
id2 = le16_to_cpu(attr2->id);
|
||
|
if (id <= id2)
|
||
|
rec->next_attr_id = cpu_to_le16(id2 + 1);
|
||
|
if (is_attr_indexed(attr))
|
||
|
le16_add_cpu(&rec->hard_links, 1);
|
||
|
|
||
|
oa2 = find_loaded_attr(log, attr, rno_base);
|
||
|
if (oa2) {
|
||
|
void *p2 = kmemdup(attr, le32_to_cpu(attr->size),
|
||
|
GFP_NOFS);
|
||
|
if (p2) {
|
||
|
// run_close(oa2->run1);
|
||
|
kfree(oa2->attr);
|
||
|
oa2->attr = p2;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case DeleteAttribute:
|
||
|
asize = le32_to_cpu(attr->size);
|
||
|
used = le32_to_cpu(rec->used);
|
||
|
|
||
|
if (!check_if_attr(rec, lrh))
|
||
|
goto dirty_vol;
|
||
|
|
||
|
rec->used = cpu_to_le32(used - asize);
|
||
|
if (is_attr_indexed(attr))
|
||
|
le16_add_cpu(&rec->hard_links, -1);
|
||
|
|
||
|
memmove(attr, Add2Ptr(attr, asize), used - asize - roff);
|
||
|
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case UpdateResidentValue:
|
||
|
nsize = aoff + dlen;
|
||
|
|
||
|
if (!check_if_attr(rec, lrh))
|
||
|
goto dirty_vol;
|
||
|
|
||
|
asize = le32_to_cpu(attr->size);
|
||
|
used = le32_to_cpu(rec->used);
|
||
|
|
||
|
if (lrh->redo_len == lrh->undo_len) {
|
||
|
if (nsize > asize)
|
||
|
goto dirty_vol;
|
||
|
goto move_data;
|
||
|
}
|
||
|
|
||
|
if (nsize > asize && nsize - asize > record_size - used)
|
||
|
goto dirty_vol;
|
||
|
|
||
|
nsize = ALIGN(nsize, 8);
|
||
|
data_off = le16_to_cpu(attr->res.data_off);
|
||
|
|
||
|
if (nsize < asize) {
|
||
|
memmove(Add2Ptr(attr, aoff), data, dlen);
|
||
|
data = NULL; // To skip below memmove().
|
||
|
}
|
||
|
|
||
|
memmove(Add2Ptr(attr, nsize), Add2Ptr(attr, asize),
|
||
|
used - le16_to_cpu(lrh->record_off) - asize);
|
||
|
|
||
|
rec->used = cpu_to_le32(used + nsize - asize);
|
||
|
attr->size = cpu_to_le32(nsize);
|
||
|
attr->res.data_size = cpu_to_le32(aoff + dlen - data_off);
|
||
|
|
||
|
move_data:
|
||
|
if (data)
|
||
|
memmove(Add2Ptr(attr, aoff), data, dlen);
|
||
|
|
||
|
oa2 = find_loaded_attr(log, attr, rno_base);
|
||
|
if (oa2) {
|
||
|
void *p2 = kmemdup(attr, le32_to_cpu(attr->size),
|
||
|
GFP_NOFS);
|
||
|
if (p2) {
|
||
|
// run_close(&oa2->run0);
|
||
|
oa2->run1 = &oa2->run0;
|
||
|
kfree(oa2->attr);
|
||
|
oa2->attr = p2;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case UpdateMappingPairs:
|
||
|
nsize = aoff + dlen;
|
||
|
asize = le32_to_cpu(attr->size);
|
||
|
used = le32_to_cpu(rec->used);
|
||
|
|
||
|
if (!check_if_attr(rec, lrh) || !attr->non_res ||
|
||
|
aoff < le16_to_cpu(attr->nres.run_off) || aoff > asize ||
|
||
|
(nsize > asize && nsize - asize > record_size - used)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
nsize = ALIGN(nsize, 8);
|
||
|
|
||
|
memmove(Add2Ptr(attr, nsize), Add2Ptr(attr, asize),
|
||
|
used - le16_to_cpu(lrh->record_off) - asize);
|
||
|
rec->used = cpu_to_le32(used + nsize - asize);
|
||
|
attr->size = cpu_to_le32(nsize);
|
||
|
memmove(Add2Ptr(attr, aoff), data, dlen);
|
||
|
|
||
|
if (run_get_highest_vcn(le64_to_cpu(attr->nres.svcn),
|
||
|
attr_run(attr), &t64)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
attr->nres.evcn = cpu_to_le64(t64);
|
||
|
oa2 = find_loaded_attr(log, attr, rno_base);
|
||
|
if (oa2 && oa2->attr->non_res)
|
||
|
oa2->attr->nres.evcn = attr->nres.evcn;
|
||
|
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case SetNewAttributeSizes:
|
||
|
new_sz = data;
|
||
|
if (!check_if_attr(rec, lrh) || !attr->non_res)
|
||
|
goto dirty_vol;
|
||
|
|
||
|
attr->nres.alloc_size = new_sz->alloc_size;
|
||
|
attr->nres.data_size = new_sz->data_size;
|
||
|
attr->nres.valid_size = new_sz->valid_size;
|
||
|
|
||
|
if (dlen >= sizeof(struct NEW_ATTRIBUTE_SIZES))
|
||
|
attr->nres.total_size = new_sz->total_size;
|
||
|
|
||
|
oa2 = find_loaded_attr(log, attr, rno_base);
|
||
|
if (oa2) {
|
||
|
void *p2 = kmemdup(attr, le32_to_cpu(attr->size),
|
||
|
GFP_NOFS);
|
||
|
if (p2) {
|
||
|
kfree(oa2->attr);
|
||
|
oa2->attr = p2;
|
||
|
}
|
||
|
}
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case AddIndexEntryRoot:
|
||
|
e = (struct NTFS_DE *)data;
|
||
|
esize = le16_to_cpu(e->size);
|
||
|
root = resident_data(attr);
|
||
|
hdr = &root->ihdr;
|
||
|
used = le32_to_cpu(hdr->used);
|
||
|
|
||
|
if (!check_if_index_root(rec, lrh) ||
|
||
|
!check_if_root_index(attr, hdr, lrh) ||
|
||
|
Add2Ptr(data, esize) > Add2Ptr(lrh, rec_len) ||
|
||
|
esize > le32_to_cpu(rec->total) - le32_to_cpu(rec->used)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
e1 = Add2Ptr(attr, le16_to_cpu(lrh->attr_off));
|
||
|
|
||
|
change_attr_size(rec, attr, le32_to_cpu(attr->size) + esize);
|
||
|
|
||
|
memmove(Add2Ptr(e1, esize), e1,
|
||
|
PtrOffset(e1, Add2Ptr(hdr, used)));
|
||
|
memmove(e1, e, esize);
|
||
|
|
||
|
le32_add_cpu(&attr->res.data_size, esize);
|
||
|
hdr->used = cpu_to_le32(used + esize);
|
||
|
le32_add_cpu(&hdr->total, esize);
|
||
|
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case DeleteIndexEntryRoot:
|
||
|
root = resident_data(attr);
|
||
|
hdr = &root->ihdr;
|
||
|
used = le32_to_cpu(hdr->used);
|
||
|
|
||
|
if (!check_if_index_root(rec, lrh) ||
|
||
|
!check_if_root_index(attr, hdr, lrh)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
e1 = Add2Ptr(attr, le16_to_cpu(lrh->attr_off));
|
||
|
esize = le16_to_cpu(e1->size);
|
||
|
e2 = Add2Ptr(e1, esize);
|
||
|
|
||
|
memmove(e1, e2, PtrOffset(e2, Add2Ptr(hdr, used)));
|
||
|
|
||
|
le32_sub_cpu(&attr->res.data_size, esize);
|
||
|
hdr->used = cpu_to_le32(used - esize);
|
||
|
le32_sub_cpu(&hdr->total, esize);
|
||
|
|
||
|
change_attr_size(rec, attr, le32_to_cpu(attr->size) - esize);
|
||
|
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case SetIndexEntryVcnRoot:
|
||
|
root = resident_data(attr);
|
||
|
hdr = &root->ihdr;
|
||
|
|
||
|
if (!check_if_index_root(rec, lrh) ||
|
||
|
!check_if_root_index(attr, hdr, lrh)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
e = Add2Ptr(attr, le16_to_cpu(lrh->attr_off));
|
||
|
|
||
|
de_set_vbn_le(e, *(__le64 *)data);
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case UpdateFileNameRoot:
|
||
|
root = resident_data(attr);
|
||
|
hdr = &root->ihdr;
|
||
|
|
||
|
if (!check_if_index_root(rec, lrh) ||
|
||
|
!check_if_root_index(attr, hdr, lrh)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
e = Add2Ptr(attr, le16_to_cpu(lrh->attr_off));
|
||
|
fname = (struct ATTR_FILE_NAME *)(e + 1);
|
||
|
memmove(&fname->dup, data, sizeof(fname->dup)); //
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case UpdateRecordDataRoot:
|
||
|
root = resident_data(attr);
|
||
|
hdr = &root->ihdr;
|
||
|
|
||
|
if (!check_if_index_root(rec, lrh) ||
|
||
|
!check_if_root_index(attr, hdr, lrh)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
e = Add2Ptr(attr, le16_to_cpu(lrh->attr_off));
|
||
|
|
||
|
memmove(Add2Ptr(e, le16_to_cpu(e->view.data_off)), data, dlen);
|
||
|
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case ZeroEndOfFileRecord:
|
||
|
if (roff + dlen > record_size)
|
||
|
goto dirty_vol;
|
||
|
|
||
|
memset(attr, 0, dlen);
|
||
|
mi->dirty = true;
|
||
|
break;
|
||
|
|
||
|
case UpdateNonresidentValue:
|
||
|
if (lco < cbo + roff + dlen)
|
||
|
goto dirty_vol;
|
||
|
|
||
|
memcpy(Add2Ptr(buffer_le, roff), data, dlen);
|
||
|
|
||
|
a_dirty = true;
|
||
|
if (attr->type == ATTR_ALLOC)
|
||
|
ntfs_fix_pre_write(buffer_le, bytes);
|
||
|
break;
|
||
|
|
||
|
case AddIndexEntryAllocation:
|
||
|
ib = Add2Ptr(buffer_le, roff);
|
||
|
hdr = &ib->ihdr;
|
||
|
e = data;
|
||
|
esize = le16_to_cpu(e->size);
|
||
|
e1 = Add2Ptr(ib, aoff);
|
||
|
|
||
|
if (is_baad(&ib->rhdr))
|
||
|
goto dirty_vol;
|
||
|
if (!check_lsn(&ib->rhdr, rlsn))
|
||
|
goto out;
|
||
|
|
||
|
used = le32_to_cpu(hdr->used);
|
||
|
|
||
|
if (!check_index_buffer(ib, bytes) ||
|
||
|
!check_if_alloc_index(hdr, aoff) ||
|
||
|
Add2Ptr(e, esize) > Add2Ptr(lrh, rec_len) ||
|
||
|
used + esize > le32_to_cpu(hdr->total)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
memmove(Add2Ptr(e1, esize), e1,
|
||
|
PtrOffset(e1, Add2Ptr(hdr, used)));
|
||
|
memcpy(e1, e, esize);
|
||
|
|
||
|
hdr->used = cpu_to_le32(used + esize);
|
||
|
|
||
|
a_dirty = true;
|
||
|
|
||
|
ntfs_fix_pre_write(&ib->rhdr, bytes);
|
||
|
break;
|
||
|
|
||
|
case DeleteIndexEntryAllocation:
|
||
|
ib = Add2Ptr(buffer_le, roff);
|
||
|
hdr = &ib->ihdr;
|
||
|
e = Add2Ptr(ib, aoff);
|
||
|
esize = le16_to_cpu(e->size);
|
||
|
|
||
|
if (is_baad(&ib->rhdr))
|
||
|
goto dirty_vol;
|
||
|
if (!check_lsn(&ib->rhdr, rlsn))
|
||
|
goto out;
|
||
|
|
||
|
if (!check_index_buffer(ib, bytes) ||
|
||
|
!check_if_alloc_index(hdr, aoff)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
e1 = Add2Ptr(e, esize);
|
||
|
nsize = esize;
|
||
|
used = le32_to_cpu(hdr->used);
|
||
|
|
||
|
memmove(e, e1, PtrOffset(e1, Add2Ptr(hdr, used)));
|
||
|
|
||
|
hdr->used = cpu_to_le32(used - nsize);
|
||
|
|
||
|
a_dirty = true;
|
||
|
|
||
|
ntfs_fix_pre_write(&ib->rhdr, bytes);
|
||
|
break;
|
||
|
|
||
|
case WriteEndOfIndexBuffer:
|
||
|
ib = Add2Ptr(buffer_le, roff);
|
||
|
hdr = &ib->ihdr;
|
||
|
e = Add2Ptr(ib, aoff);
|
||
|
|
||
|
if (is_baad(&ib->rhdr))
|
||
|
goto dirty_vol;
|
||
|
if (!check_lsn(&ib->rhdr, rlsn))
|
||
|
goto out;
|
||
|
if (!check_index_buffer(ib, bytes) ||
|
||
|
!check_if_alloc_index(hdr, aoff) ||
|
||
|
aoff + dlen > offsetof(struct INDEX_BUFFER, ihdr) +
|
||
|
le32_to_cpu(hdr->total)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
hdr->used = cpu_to_le32(dlen + PtrOffset(hdr, e));
|
||
|
memmove(e, data, dlen);
|
||
|
|
||
|
a_dirty = true;
|
||
|
ntfs_fix_pre_write(&ib->rhdr, bytes);
|
||
|
break;
|
||
|
|
||
|
case SetIndexEntryVcnAllocation:
|
||
|
ib = Add2Ptr(buffer_le, roff);
|
||
|
hdr = &ib->ihdr;
|
||
|
e = Add2Ptr(ib, aoff);
|
||
|
|
||
|
if (is_baad(&ib->rhdr))
|
||
|
goto dirty_vol;
|
||
|
|
||
|
if (!check_lsn(&ib->rhdr, rlsn))
|
||
|
goto out;
|
||
|
if (!check_index_buffer(ib, bytes) ||
|
||
|
!check_if_alloc_index(hdr, aoff)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
de_set_vbn_le(e, *(__le64 *)data);
|
||
|
|
||
|
a_dirty = true;
|
||
|
ntfs_fix_pre_write(&ib->rhdr, bytes);
|
||
|
break;
|
||
|
|
||
|
case UpdateFileNameAllocation:
|
||
|
ib = Add2Ptr(buffer_le, roff);
|
||
|
hdr = &ib->ihdr;
|
||
|
e = Add2Ptr(ib, aoff);
|
||
|
|
||
|
if (is_baad(&ib->rhdr))
|
||
|
goto dirty_vol;
|
||
|
|
||
|
if (!check_lsn(&ib->rhdr, rlsn))
|
||
|
goto out;
|
||
|
if (!check_index_buffer(ib, bytes) ||
|
||
|
!check_if_alloc_index(hdr, aoff)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
fname = (struct ATTR_FILE_NAME *)(e + 1);
|
||
|
memmove(&fname->dup, data, sizeof(fname->dup));
|
||
|
|
||
|
a_dirty = true;
|
||
|
ntfs_fix_pre_write(&ib->rhdr, bytes);
|
||
|
break;
|
||
|
|
||
|
case SetBitsInNonresidentBitMap:
|
||
|
bmp_off =
|
||
|
le32_to_cpu(((struct BITMAP_RANGE *)data)->bitmap_off);
|
||
|
bmp_bits = le32_to_cpu(((struct BITMAP_RANGE *)data)->bits);
|
||
|
|
||
|
if (cbo + (bmp_off + 7) / 8 > lco ||
|
||
|
cbo + ((bmp_off + bmp_bits + 7) / 8) > lco) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
__bitmap_set(Add2Ptr(buffer_le, roff), bmp_off, bmp_bits);
|
||
|
a_dirty = true;
|
||
|
break;
|
||
|
|
||
|
case ClearBitsInNonresidentBitMap:
|
||
|
bmp_off =
|
||
|
le32_to_cpu(((struct BITMAP_RANGE *)data)->bitmap_off);
|
||
|
bmp_bits = le32_to_cpu(((struct BITMAP_RANGE *)data)->bits);
|
||
|
|
||
|
if (cbo + (bmp_off + 7) / 8 > lco ||
|
||
|
cbo + ((bmp_off + bmp_bits + 7) / 8) > lco) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
__bitmap_clear(Add2Ptr(buffer_le, roff), bmp_off, bmp_bits);
|
||
|
a_dirty = true;
|
||
|
break;
|
||
|
|
||
|
case UpdateRecordDataAllocation:
|
||
|
ib = Add2Ptr(buffer_le, roff);
|
||
|
hdr = &ib->ihdr;
|
||
|
e = Add2Ptr(ib, aoff);
|
||
|
|
||
|
if (is_baad(&ib->rhdr))
|
||
|
goto dirty_vol;
|
||
|
|
||
|
if (!check_lsn(&ib->rhdr, rlsn))
|
||
|
goto out;
|
||
|
if (!check_index_buffer(ib, bytes) ||
|
||
|
!check_if_alloc_index(hdr, aoff)) {
|
||
|
goto dirty_vol;
|
||
|
}
|
||
|
|
||
|
memmove(Add2Ptr(e, le16_to_cpu(e->view.data_off)), data, dlen);
|
||
|
|
||
|
a_dirty = true;
|
||
|
ntfs_fix_pre_write(&ib->rhdr, bytes);
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
WARN_ON(1);
|
||
|
}
|
||
|
|
||
|
if (rlsn) {
|
||
|
__le64 t64 = cpu_to_le64(*rlsn);
|
||
|
|
||
|
if (rec)
|
||
|
rec->rhdr.lsn = t64;
|
||
|
if (ib)
|
||
|
ib->rhdr.lsn = t64;
|
||
|
}
|
||
|
|
||
|
if (mi && mi->dirty) {
|
||
|
err = mi_write(mi, 0);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (a_dirty) {
|
||
|
attr = oa->attr;
|
||
|
err = ntfs_sb_write_run(sbi, oa->run1, vbo, buffer_le, bytes, 0);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
out:
|
||
|
|
||
|
if (inode)
|
||
|
iput(inode);
|
||
|
else if (mi != mi2_child)
|
||
|
mi_put(mi);
|
||
|
|
||
|
kfree(buffer_le);
|
||
|
|
||
|
return err;
|
||
|
|
||
|
dirty_vol:
|
||
|
log->set_dirty = true;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* log_replay - Replays log and empties it.
|
||
|
*
|
||
|
* This function is called during mount operation.
|
||
|
* It replays log and empties it.
|
||
|
* Initialized is set false if logfile contains '-1'.
|
||
|
*/
|
||
|
int log_replay(struct ntfs_inode *ni, bool *initialized)
|
||
|
{
|
||
|
int err;
|
||
|
struct ntfs_sb_info *sbi = ni->mi.sbi;
|
||
|
struct ntfs_log *log;
|
||
|
|
||
|
struct restart_info rst_info, rst_info2;
|
||
|
u64 rec_lsn, ra_lsn, checkpt_lsn = 0, rlsn = 0;
|
||
|
struct ATTR_NAME_ENTRY *attr_names = NULL;
|
||
|
struct ATTR_NAME_ENTRY *ane;
|
||
|
struct RESTART_TABLE *dptbl = NULL;
|
||
|
struct RESTART_TABLE *trtbl = NULL;
|
||
|
const struct RESTART_TABLE *rt;
|
||
|
struct RESTART_TABLE *oatbl = NULL;
|
||
|
struct inode *inode;
|
||
|
struct OpenAttr *oa;
|
||
|
struct ntfs_inode *ni_oe;
|
||
|
struct ATTRIB *attr = NULL;
|
||
|
u64 size, vcn, undo_next_lsn;
|
||
|
CLST rno, lcn, lcn0, len0, clen;
|
||
|
void *data;
|
||
|
struct NTFS_RESTART *rst = NULL;
|
||
|
struct lcb *lcb = NULL;
|
||
|
struct OPEN_ATTR_ENRTY *oe;
|
||
|
struct TRANSACTION_ENTRY *tr;
|
||
|
struct DIR_PAGE_ENTRY *dp;
|
||
|
u32 i, bytes_per_attr_entry;
|
||
|
u32 l_size = ni->vfs_inode.i_size;
|
||
|
u32 orig_file_size = l_size;
|
||
|
u32 page_size, vbo, tail, off, dlen;
|
||
|
u32 saved_len, rec_len, transact_id;
|
||
|
bool use_second_page;
|
||
|
struct RESTART_AREA *ra2, *ra = NULL;
|
||
|
struct CLIENT_REC *ca, *cr;
|
||
|
__le16 client;
|
||
|
struct RESTART_HDR *rh;
|
||
|
const struct LFS_RECORD_HDR *frh;
|
||
|
const struct LOG_REC_HDR *lrh;
|
||
|
bool is_mapped;
|
||
|
bool is_ro = sb_rdonly(sbi->sb);
|
||
|
u64 t64;
|
||
|
u16 t16;
|
||
|
u32 t32;
|
||
|
|
||
|
/* Get the size of page. NOTE: To replay we can use default page. */
|
||
|
#if PAGE_SIZE >= DefaultLogPageSize && PAGE_SIZE <= DefaultLogPageSize * 2
|
||
|
page_size = norm_file_page(PAGE_SIZE, &l_size, true);
|
||
|
#else
|
||
|
page_size = norm_file_page(PAGE_SIZE, &l_size, false);
|
||
|
#endif
|
||
|
if (!page_size)
|
||
|
return -EINVAL;
|
||
|
|
||
|
log = kzalloc(sizeof(struct ntfs_log), GFP_NOFS);
|
||
|
if (!log)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
memset(&rst_info, 0, sizeof(struct restart_info));
|
||
|
|
||
|
log->ni = ni;
|
||
|
log->l_size = l_size;
|
||
|
log->one_page_buf = kmalloc(page_size, GFP_NOFS);
|
||
|
if (!log->one_page_buf) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
log->page_size = page_size;
|
||
|
log->page_mask = page_size - 1;
|
||
|
log->page_bits = blksize_bits(page_size);
|
||
|
|
||
|
/* Look for a restart area on the disk. */
|
||
|
err = log_read_rst(log, l_size, true, &rst_info);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
/* remember 'initialized' */
|
||
|
*initialized = rst_info.initialized;
|
||
|
|
||
|
if (!rst_info.restart) {
|
||
|
if (rst_info.initialized) {
|
||
|
/* No restart area but the file is not initialized. */
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
log_init_pg_hdr(log, page_size, page_size, 1, 1);
|
||
|
log_create(log, l_size, 0, get_random_u32(), false, false);
|
||
|
|
||
|
log->ra = ra;
|
||
|
|
||
|
ra = log_create_ra(log);
|
||
|
if (!ra) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
log->ra = ra;
|
||
|
log->init_ra = true;
|
||
|
|
||
|
goto process_log;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If the restart offset above wasn't zero then we won't
|
||
|
* look for a second restart.
|
||
|
*/
|
||
|
if (rst_info.vbo)
|
||
|
goto check_restart_area;
|
||
|
|
||
|
memset(&rst_info2, 0, sizeof(struct restart_info));
|
||
|
err = log_read_rst(log, l_size, false, &rst_info2);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
/* Determine which restart area to use. */
|
||
|
if (!rst_info2.restart || rst_info2.last_lsn <= rst_info.last_lsn)
|
||
|
goto use_first_page;
|
||
|
|
||
|
use_second_page = true;
|
||
|
|
||
|
if (rst_info.chkdsk_was_run && page_size != rst_info.vbo) {
|
||
|
struct RECORD_PAGE_HDR *sp = NULL;
|
||
|
bool usa_error;
|
||
|
|
||
|
if (!read_log_page(log, page_size, &sp, &usa_error) &&
|
||
|
sp->rhdr.sign == NTFS_CHKD_SIGNATURE) {
|
||
|
use_second_page = false;
|
||
|
}
|
||
|
kfree(sp);
|
||
|
}
|
||
|
|
||
|
if (use_second_page) {
|
||
|
kfree(rst_info.r_page);
|
||
|
memcpy(&rst_info, &rst_info2, sizeof(struct restart_info));
|
||
|
rst_info2.r_page = NULL;
|
||
|
}
|
||
|
|
||
|
use_first_page:
|
||
|
kfree(rst_info2.r_page);
|
||
|
|
||
|
check_restart_area:
|
||
|
/*
|
||
|
* If the restart area is at offset 0, we want
|
||
|
* to write the second restart area first.
|
||
|
*/
|
||
|
log->init_ra = !!rst_info.vbo;
|
||
|
|
||
|
/* If we have a valid page then grab a pointer to the restart area. */
|
||
|
ra2 = rst_info.valid_page
|
||
|
? Add2Ptr(rst_info.r_page,
|
||
|
le16_to_cpu(rst_info.r_page->ra_off))
|
||
|
: NULL;
|
||
|
|
||
|
if (rst_info.chkdsk_was_run ||
|
||
|
(ra2 && ra2->client_idx[1] == LFS_NO_CLIENT_LE)) {
|
||
|
bool wrapped = false;
|
||
|
bool use_multi_page = false;
|
||
|
u32 open_log_count;
|
||
|
|
||
|
/* Do some checks based on whether we have a valid log page. */
|
||
|
if (!rst_info.valid_page) {
|
||
|
open_log_count = get_random_u32();
|
||
|
goto init_log_instance;
|
||
|
}
|
||
|
open_log_count = le32_to_cpu(ra2->open_log_count);
|
||
|
|
||
|
/*
|
||
|
* If the restart page size isn't changing then we want to
|
||
|
* check how much work we need to do.
|
||
|
*/
|
||
|
if (page_size != le32_to_cpu(rst_info.r_page->sys_page_size))
|
||
|
goto init_log_instance;
|
||
|
|
||
|
init_log_instance:
|
||
|
log_init_pg_hdr(log, page_size, page_size, 1, 1);
|
||
|
|
||
|
log_create(log, l_size, rst_info.last_lsn, open_log_count,
|
||
|
wrapped, use_multi_page);
|
||
|
|
||
|
ra = log_create_ra(log);
|
||
|
if (!ra) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
log->ra = ra;
|
||
|
|
||
|
/* Put the restart areas and initialize
|
||
|
* the log file as required.
|
||
|
*/
|
||
|
goto process_log;
|
||
|
}
|
||
|
|
||
|
if (!ra2) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If the log page or the system page sizes have changed, we can't
|
||
|
* use the log file. We must use the system page size instead of the
|
||
|
* default size if there is not a clean shutdown.
|
||
|
*/
|
||
|
t32 = le32_to_cpu(rst_info.r_page->sys_page_size);
|
||
|
if (page_size != t32) {
|
||
|
l_size = orig_file_size;
|
||
|
page_size =
|
||
|
norm_file_page(t32, &l_size, t32 == DefaultLogPageSize);
|
||
|
}
|
||
|
|
||
|
if (page_size != t32 ||
|
||
|
page_size != le32_to_cpu(rst_info.r_page->page_size)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* If the file size has shrunk then we won't mount it. */
|
||
|
if (l_size < le64_to_cpu(ra2->l_size)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
log_init_pg_hdr(log, page_size, page_size,
|
||
|
le16_to_cpu(rst_info.r_page->major_ver),
|
||
|
le16_to_cpu(rst_info.r_page->minor_ver));
|
||
|
|
||
|
log->l_size = le64_to_cpu(ra2->l_size);
|
||
|
log->seq_num_bits = le32_to_cpu(ra2->seq_num_bits);
|
||
|
log->file_data_bits = sizeof(u64) * 8 - log->seq_num_bits;
|
||
|
log->seq_num_mask = (8 << log->file_data_bits) - 1;
|
||
|
log->last_lsn = le64_to_cpu(ra2->current_lsn);
|
||
|
log->seq_num = log->last_lsn >> log->file_data_bits;
|
||
|
log->ra_off = le16_to_cpu(rst_info.r_page->ra_off);
|
||
|
log->restart_size = log->sys_page_size - log->ra_off;
|
||
|
log->record_header_len = le16_to_cpu(ra2->rec_hdr_len);
|
||
|
log->ra_size = le16_to_cpu(ra2->ra_len);
|
||
|
log->data_off = le16_to_cpu(ra2->data_off);
|
||
|
log->data_size = log->page_size - log->data_off;
|
||
|
log->reserved = log->data_size - log->record_header_len;
|
||
|
|
||
|
vbo = lsn_to_vbo(log, log->last_lsn);
|
||
|
|
||
|
if (vbo < log->first_page) {
|
||
|
/* This is a pseudo lsn. */
|
||
|
log->l_flags |= NTFSLOG_NO_LAST_LSN;
|
||
|
log->next_page = log->first_page;
|
||
|
goto find_oldest;
|
||
|
}
|
||
|
|
||
|
/* Find the end of this log record. */
|
||
|
off = final_log_off(log, log->last_lsn,
|
||
|
le32_to_cpu(ra2->last_lsn_data_len));
|
||
|
|
||
|
/* If we wrapped the file then increment the sequence number. */
|
||
|
if (off <= vbo) {
|
||
|
log->seq_num += 1;
|
||
|
log->l_flags |= NTFSLOG_WRAPPED;
|
||
|
}
|
||
|
|
||
|
/* Now compute the next log page to use. */
|
||
|
vbo &= ~log->sys_page_mask;
|
||
|
tail = log->page_size - (off & log->page_mask) - 1;
|
||
|
|
||
|
/*
|
||
|
*If we can fit another log record on the page,
|
||
|
* move back a page the log file.
|
||
|
*/
|
||
|
if (tail >= log->record_header_len) {
|
||
|
log->l_flags |= NTFSLOG_REUSE_TAIL;
|
||
|
log->next_page = vbo;
|
||
|
} else {
|
||
|
log->next_page = next_page_off(log, vbo);
|
||
|
}
|
||
|
|
||
|
find_oldest:
|
||
|
/*
|
||
|
* Find the oldest client lsn. Use the last
|
||
|
* flushed lsn as a starting point.
|
||
|
*/
|
||
|
log->oldest_lsn = log->last_lsn;
|
||
|
oldest_client_lsn(Add2Ptr(ra2, le16_to_cpu(ra2->client_off)),
|
||
|
ra2->client_idx[1], &log->oldest_lsn);
|
||
|
log->oldest_lsn_off = lsn_to_vbo(log, log->oldest_lsn);
|
||
|
|
||
|
if (log->oldest_lsn_off < log->first_page)
|
||
|
log->l_flags |= NTFSLOG_NO_OLDEST_LSN;
|
||
|
|
||
|
if (!(ra2->flags & RESTART_SINGLE_PAGE_IO))
|
||
|
log->l_flags |= NTFSLOG_WRAPPED | NTFSLOG_MULTIPLE_PAGE_IO;
|
||
|
|
||
|
log->current_openlog_count = le32_to_cpu(ra2->open_log_count);
|
||
|
log->total_avail_pages = log->l_size - log->first_page;
|
||
|
log->total_avail = log->total_avail_pages >> log->page_bits;
|
||
|
log->max_current_avail = log->total_avail * log->reserved;
|
||
|
log->total_avail = log->total_avail * log->data_size;
|
||
|
|
||
|
log->current_avail = current_log_avail(log);
|
||
|
|
||
|
ra = kzalloc(log->restart_size, GFP_NOFS);
|
||
|
if (!ra) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
log->ra = ra;
|
||
|
|
||
|
t16 = le16_to_cpu(ra2->client_off);
|
||
|
if (t16 == offsetof(struct RESTART_AREA, clients)) {
|
||
|
memcpy(ra, ra2, log->ra_size);
|
||
|
} else {
|
||
|
memcpy(ra, ra2, offsetof(struct RESTART_AREA, clients));
|
||
|
memcpy(ra->clients, Add2Ptr(ra2, t16),
|
||
|
le16_to_cpu(ra2->ra_len) - t16);
|
||
|
|
||
|
log->current_openlog_count = get_random_u32();
|
||
|
ra->open_log_count = cpu_to_le32(log->current_openlog_count);
|
||
|
log->ra_size = offsetof(struct RESTART_AREA, clients) +
|
||
|
sizeof(struct CLIENT_REC);
|
||
|
ra->client_off =
|
||
|
cpu_to_le16(offsetof(struct RESTART_AREA, clients));
|
||
|
ra->ra_len = cpu_to_le16(log->ra_size);
|
||
|
}
|
||
|
|
||
|
le32_add_cpu(&ra->open_log_count, 1);
|
||
|
|
||
|
/* Now we need to walk through looking for the last lsn. */
|
||
|
err = last_log_lsn(log);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
log->current_avail = current_log_avail(log);
|
||
|
|
||
|
/* Remember which restart area to write first. */
|
||
|
log->init_ra = rst_info.vbo;
|
||
|
|
||
|
process_log:
|
||
|
/* 1.0, 1.1, 2.0 log->major_ver/minor_ver - short values. */
|
||
|
switch ((log->major_ver << 16) + log->minor_ver) {
|
||
|
case 0x10000:
|
||
|
case 0x10001:
|
||
|
case 0x20000:
|
||
|
break;
|
||
|
default:
|
||
|
ntfs_warn(sbi->sb, "\x24LogFile version %d.%d is not supported",
|
||
|
log->major_ver, log->minor_ver);
|
||
|
err = -EOPNOTSUPP;
|
||
|
log->set_dirty = true;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* One client "NTFS" per logfile. */
|
||
|
ca = Add2Ptr(ra, le16_to_cpu(ra->client_off));
|
||
|
|
||
|
for (client = ra->client_idx[1];; client = cr->next_client) {
|
||
|
if (client == LFS_NO_CLIENT_LE) {
|
||
|
/* Insert "NTFS" client LogFile. */
|
||
|
client = ra->client_idx[0];
|
||
|
if (client == LFS_NO_CLIENT_LE) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
t16 = le16_to_cpu(client);
|
||
|
cr = ca + t16;
|
||
|
|
||
|
remove_client(ca, cr, &ra->client_idx[0]);
|
||
|
|
||
|
cr->restart_lsn = 0;
|
||
|
cr->oldest_lsn = cpu_to_le64(log->oldest_lsn);
|
||
|
cr->name_bytes = cpu_to_le32(8);
|
||
|
cr->name[0] = cpu_to_le16('N');
|
||
|
cr->name[1] = cpu_to_le16('T');
|
||
|
cr->name[2] = cpu_to_le16('F');
|
||
|
cr->name[3] = cpu_to_le16('S');
|
||
|
|
||
|
add_client(ca, t16, &ra->client_idx[1]);
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
cr = ca + le16_to_cpu(client);
|
||
|
|
||
|
if (cpu_to_le32(8) == cr->name_bytes &&
|
||
|
cpu_to_le16('N') == cr->name[0] &&
|
||
|
cpu_to_le16('T') == cr->name[1] &&
|
||
|
cpu_to_le16('F') == cr->name[2] &&
|
||
|
cpu_to_le16('S') == cr->name[3])
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
/* Update the client handle with the client block information. */
|
||
|
log->client_id.seq_num = cr->seq_num;
|
||
|
log->client_id.client_idx = client;
|
||
|
|
||
|
err = read_rst_area(log, &rst, &ra_lsn);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
if (!rst)
|
||
|
goto out;
|
||
|
|
||
|
bytes_per_attr_entry = !rst->major_ver ? 0x2C : 0x28;
|
||
|
|
||
|
checkpt_lsn = le64_to_cpu(rst->check_point_start);
|
||
|
if (!checkpt_lsn)
|
||
|
checkpt_lsn = ra_lsn;
|
||
|
|
||
|
/* Allocate and Read the Transaction Table. */
|
||
|
if (!rst->transact_table_len)
|
||
|
goto check_dirty_page_table;
|
||
|
|
||
|
t64 = le64_to_cpu(rst->transact_table_lsn);
|
||
|
err = read_log_rec_lcb(log, t64, lcb_ctx_prev, &lcb);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
lrh = lcb->log_rec;
|
||
|
frh = lcb->lrh;
|
||
|
rec_len = le32_to_cpu(frh->client_data_len);
|
||
|
|
||
|
if (!check_log_rec(lrh, rec_len, le32_to_cpu(frh->transact_id),
|
||
|
bytes_per_attr_entry)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
t16 = le16_to_cpu(lrh->redo_off);
|
||
|
|
||
|
rt = Add2Ptr(lrh, t16);
|
||
|
t32 = rec_len - t16;
|
||
|
|
||
|
/* Now check that this is a valid restart table. */
|
||
|
if (!check_rstbl(rt, t32)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
trtbl = kmemdup(rt, t32, GFP_NOFS);
|
||
|
if (!trtbl) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
lcb_put(lcb);
|
||
|
lcb = NULL;
|
||
|
|
||
|
check_dirty_page_table:
|
||
|
/* The next record back should be the Dirty Pages Table. */
|
||
|
if (!rst->dirty_pages_len)
|
||
|
goto check_attribute_names;
|
||
|
|
||
|
t64 = le64_to_cpu(rst->dirty_pages_table_lsn);
|
||
|
err = read_log_rec_lcb(log, t64, lcb_ctx_prev, &lcb);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
lrh = lcb->log_rec;
|
||
|
frh = lcb->lrh;
|
||
|
rec_len = le32_to_cpu(frh->client_data_len);
|
||
|
|
||
|
if (!check_log_rec(lrh, rec_len, le32_to_cpu(frh->transact_id),
|
||
|
bytes_per_attr_entry)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
t16 = le16_to_cpu(lrh->redo_off);
|
||
|
|
||
|
rt = Add2Ptr(lrh, t16);
|
||
|
t32 = rec_len - t16;
|
||
|
|
||
|
/* Now check that this is a valid restart table. */
|
||
|
if (!check_rstbl(rt, t32)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
dptbl = kmemdup(rt, t32, GFP_NOFS);
|
||
|
if (!dptbl) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* Convert Ra version '0' into version '1'. */
|
||
|
if (rst->major_ver)
|
||
|
goto end_conv_1;
|
||
|
|
||
|
dp = NULL;
|
||
|
while ((dp = enum_rstbl(dptbl, dp))) {
|
||
|
struct DIR_PAGE_ENTRY_32 *dp0 = (struct DIR_PAGE_ENTRY_32 *)dp;
|
||
|
// NOTE: Danger. Check for of boundary.
|
||
|
memmove(&dp->vcn, &dp0->vcn_low,
|
||
|
2 * sizeof(u64) +
|
||
|
le32_to_cpu(dp->lcns_follow) * sizeof(u64));
|
||
|
}
|
||
|
|
||
|
end_conv_1:
|
||
|
lcb_put(lcb);
|
||
|
lcb = NULL;
|
||
|
|
||
|
/*
|
||
|
* Go through the table and remove the duplicates,
|
||
|
* remembering the oldest lsn values.
|
||
|
*/
|
||
|
if (sbi->cluster_size <= log->page_size)
|
||
|
goto trace_dp_table;
|
||
|
|
||
|
dp = NULL;
|
||
|
while ((dp = enum_rstbl(dptbl, dp))) {
|
||
|
struct DIR_PAGE_ENTRY *next = dp;
|
||
|
|
||
|
while ((next = enum_rstbl(dptbl, next))) {
|
||
|
if (next->target_attr == dp->target_attr &&
|
||
|
next->vcn == dp->vcn) {
|
||
|
if (le64_to_cpu(next->oldest_lsn) <
|
||
|
le64_to_cpu(dp->oldest_lsn)) {
|
||
|
dp->oldest_lsn = next->oldest_lsn;
|
||
|
}
|
||
|
|
||
|
free_rsttbl_idx(dptbl, PtrOffset(dptbl, next));
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
trace_dp_table:
|
||
|
check_attribute_names:
|
||
|
/* The next record should be the Attribute Names. */
|
||
|
if (!rst->attr_names_len)
|
||
|
goto check_attr_table;
|
||
|
|
||
|
t64 = le64_to_cpu(rst->attr_names_lsn);
|
||
|
err = read_log_rec_lcb(log, t64, lcb_ctx_prev, &lcb);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
lrh = lcb->log_rec;
|
||
|
frh = lcb->lrh;
|
||
|
rec_len = le32_to_cpu(frh->client_data_len);
|
||
|
|
||
|
if (!check_log_rec(lrh, rec_len, le32_to_cpu(frh->transact_id),
|
||
|
bytes_per_attr_entry)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
t32 = lrh_length(lrh);
|
||
|
rec_len -= t32;
|
||
|
|
||
|
attr_names = kmemdup(Add2Ptr(lrh, t32), rec_len, GFP_NOFS);
|
||
|
if (!attr_names) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
lcb_put(lcb);
|
||
|
lcb = NULL;
|
||
|
|
||
|
check_attr_table:
|
||
|
/* The next record should be the attribute Table. */
|
||
|
if (!rst->open_attr_len)
|
||
|
goto check_attribute_names2;
|
||
|
|
||
|
t64 = le64_to_cpu(rst->open_attr_table_lsn);
|
||
|
err = read_log_rec_lcb(log, t64, lcb_ctx_prev, &lcb);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
lrh = lcb->log_rec;
|
||
|
frh = lcb->lrh;
|
||
|
rec_len = le32_to_cpu(frh->client_data_len);
|
||
|
|
||
|
if (!check_log_rec(lrh, rec_len, le32_to_cpu(frh->transact_id),
|
||
|
bytes_per_attr_entry)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
t16 = le16_to_cpu(lrh->redo_off);
|
||
|
|
||
|
rt = Add2Ptr(lrh, t16);
|
||
|
t32 = rec_len - t16;
|
||
|
|
||
|
if (!check_rstbl(rt, t32)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
oatbl = kmemdup(rt, t32, GFP_NOFS);
|
||
|
if (!oatbl) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
log->open_attr_tbl = oatbl;
|
||
|
|
||
|
/* Clear all of the Attr pointers. */
|
||
|
oe = NULL;
|
||
|
while ((oe = enum_rstbl(oatbl, oe))) {
|
||
|
if (!rst->major_ver) {
|
||
|
struct OPEN_ATTR_ENRTY_32 oe0;
|
||
|
|
||
|
/* Really 'oe' points to OPEN_ATTR_ENRTY_32. */
|
||
|
memcpy(&oe0, oe, SIZEOF_OPENATTRIBUTEENTRY0);
|
||
|
|
||
|
oe->bytes_per_index = oe0.bytes_per_index;
|
||
|
oe->type = oe0.type;
|
||
|
oe->is_dirty_pages = oe0.is_dirty_pages;
|
||
|
oe->name_len = 0;
|
||
|
oe->ref = oe0.ref;
|
||
|
oe->open_record_lsn = oe0.open_record_lsn;
|
||
|
}
|
||
|
|
||
|
oe->is_attr_name = 0;
|
||
|
oe->ptr = NULL;
|
||
|
}
|
||
|
|
||
|
lcb_put(lcb);
|
||
|
lcb = NULL;
|
||
|
|
||
|
check_attribute_names2:
|
||
|
if (!rst->attr_names_len)
|
||
|
goto trace_attribute_table;
|
||
|
|
||
|
ane = attr_names;
|
||
|
if (!oatbl)
|
||
|
goto trace_attribute_table;
|
||
|
while (ane->off) {
|
||
|
/* TODO: Clear table on exit! */
|
||
|
oe = Add2Ptr(oatbl, le16_to_cpu(ane->off));
|
||
|
t16 = le16_to_cpu(ane->name_bytes);
|
||
|
oe->name_len = t16 / sizeof(short);
|
||
|
oe->ptr = ane->name;
|
||
|
oe->is_attr_name = 2;
|
||
|
ane = Add2Ptr(ane, sizeof(struct ATTR_NAME_ENTRY) + t16);
|
||
|
}
|
||
|
|
||
|
trace_attribute_table:
|
||
|
/*
|
||
|
* If the checkpt_lsn is zero, then this is a freshly
|
||
|
* formatted disk and we have no work to do.
|
||
|
*/
|
||
|
if (!checkpt_lsn) {
|
||
|
err = 0;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (!oatbl) {
|
||
|
oatbl = init_rsttbl(bytes_per_attr_entry, 8);
|
||
|
if (!oatbl) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
log->open_attr_tbl = oatbl;
|
||
|
|
||
|
/* Start the analysis pass from the Checkpoint lsn. */
|
||
|
rec_lsn = checkpt_lsn;
|
||
|
|
||
|
/* Read the first lsn. */
|
||
|
err = read_log_rec_lcb(log, checkpt_lsn, lcb_ctx_next, &lcb);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
/* Loop to read all subsequent records to the end of the log file. */
|
||
|
next_log_record_analyze:
|
||
|
err = read_next_log_rec(log, lcb, &rec_lsn);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
if (!rec_lsn)
|
||
|
goto end_log_records_enumerate;
|
||
|
|
||
|
frh = lcb->lrh;
|
||
|
transact_id = le32_to_cpu(frh->transact_id);
|
||
|
rec_len = le32_to_cpu(frh->client_data_len);
|
||
|
lrh = lcb->log_rec;
|
||
|
|
||
|
if (!check_log_rec(lrh, rec_len, transact_id, bytes_per_attr_entry)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* The first lsn after the previous lsn remembered
|
||
|
* the checkpoint is the first candidate for the rlsn.
|
||
|
*/
|
||
|
if (!rlsn)
|
||
|
rlsn = rec_lsn;
|
||
|
|
||
|
if (LfsClientRecord != frh->record_type)
|
||
|
goto next_log_record_analyze;
|
||
|
|
||
|
/*
|
||
|
* Now update the Transaction Table for this transaction. If there
|
||
|
* is no entry present or it is unallocated we allocate the entry.
|
||
|
*/
|
||
|
if (!trtbl) {
|
||
|
trtbl = init_rsttbl(sizeof(struct TRANSACTION_ENTRY),
|
||
|
INITIAL_NUMBER_TRANSACTIONS);
|
||
|
if (!trtbl) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
tr = Add2Ptr(trtbl, transact_id);
|
||
|
|
||
|
if (transact_id >= bytes_per_rt(trtbl) ||
|
||
|
tr->next != RESTART_ENTRY_ALLOCATED_LE) {
|
||
|
tr = alloc_rsttbl_from_idx(&trtbl, transact_id);
|
||
|
if (!tr) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
tr->transact_state = TransactionActive;
|
||
|
tr->first_lsn = cpu_to_le64(rec_lsn);
|
||
|
}
|
||
|
|
||
|
tr->prev_lsn = tr->undo_next_lsn = cpu_to_le64(rec_lsn);
|
||
|
|
||
|
/*
|
||
|
* If this is a compensation log record, then change
|
||
|
* the undo_next_lsn to be the undo_next_lsn of this record.
|
||
|
*/
|
||
|
if (lrh->undo_op == cpu_to_le16(CompensationLogRecord))
|
||
|
tr->undo_next_lsn = frh->client_undo_next_lsn;
|
||
|
|
||
|
/* Dispatch to handle log record depending on type. */
|
||
|
switch (le16_to_cpu(lrh->redo_op)) {
|
||
|
case InitializeFileRecordSegment:
|
||
|
case DeallocateFileRecordSegment:
|
||
|
case WriteEndOfFileRecordSegment:
|
||
|
case CreateAttribute:
|
||
|
case DeleteAttribute:
|
||
|
case UpdateResidentValue:
|
||
|
case UpdateNonresidentValue:
|
||
|
case UpdateMappingPairs:
|
||
|
case SetNewAttributeSizes:
|
||
|
case AddIndexEntryRoot:
|
||
|
case DeleteIndexEntryRoot:
|
||
|
case AddIndexEntryAllocation:
|
||
|
case DeleteIndexEntryAllocation:
|
||
|
case WriteEndOfIndexBuffer:
|
||
|
case SetIndexEntryVcnRoot:
|
||
|
case SetIndexEntryVcnAllocation:
|
||
|
case UpdateFileNameRoot:
|
||
|
case UpdateFileNameAllocation:
|
||
|
case SetBitsInNonresidentBitMap:
|
||
|
case ClearBitsInNonresidentBitMap:
|
||
|
case UpdateRecordDataRoot:
|
||
|
case UpdateRecordDataAllocation:
|
||
|
case ZeroEndOfFileRecord:
|
||
|
t16 = le16_to_cpu(lrh->target_attr);
|
||
|
t64 = le64_to_cpu(lrh->target_vcn);
|
||
|
dp = find_dp(dptbl, t16, t64);
|
||
|
|
||
|
if (dp)
|
||
|
goto copy_lcns;
|
||
|
|
||
|
/*
|
||
|
* Calculate the number of clusters per page the system
|
||
|
* which wrote the checkpoint, possibly creating the table.
|
||
|
*/
|
||
|
if (dptbl) {
|
||
|
t32 = (le16_to_cpu(dptbl->size) -
|
||
|
sizeof(struct DIR_PAGE_ENTRY)) /
|
||
|
sizeof(u64);
|
||
|
} else {
|
||
|
t32 = log->clst_per_page;
|
||
|
kfree(dptbl);
|
||
|
dptbl = init_rsttbl(struct_size(dp, page_lcns, t32),
|
||
|
32);
|
||
|
if (!dptbl) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
dp = alloc_rsttbl_idx(&dptbl);
|
||
|
if (!dp) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
dp->target_attr = cpu_to_le32(t16);
|
||
|
dp->transfer_len = cpu_to_le32(t32 << sbi->cluster_bits);
|
||
|
dp->lcns_follow = cpu_to_le32(t32);
|
||
|
dp->vcn = cpu_to_le64(t64 & ~((u64)t32 - 1));
|
||
|
dp->oldest_lsn = cpu_to_le64(rec_lsn);
|
||
|
|
||
|
copy_lcns:
|
||
|
/*
|
||
|
* Copy the Lcns from the log record into the Dirty Page Entry.
|
||
|
* TODO: For different page size support, must somehow make
|
||
|
* whole routine a loop, case Lcns do not fit below.
|
||
|
*/
|
||
|
t16 = le16_to_cpu(lrh->lcns_follow);
|
||
|
for (i = 0; i < t16; i++) {
|
||
|
size_t j = (size_t)(le64_to_cpu(lrh->target_vcn) -
|
||
|
le64_to_cpu(dp->vcn));
|
||
|
dp->page_lcns[j + i] = lrh->page_lcns[i];
|
||
|
}
|
||
|
|
||
|
goto next_log_record_analyze;
|
||
|
|
||
|
case DeleteDirtyClusters: {
|
||
|
u32 range_count =
|
||
|
le16_to_cpu(lrh->redo_len) / sizeof(struct LCN_RANGE);
|
||
|
const struct LCN_RANGE *r =
|
||
|
Add2Ptr(lrh, le16_to_cpu(lrh->redo_off));
|
||
|
|
||
|
/* Loop through all of the Lcn ranges this log record. */
|
||
|
for (i = 0; i < range_count; i++, r++) {
|
||
|
u64 lcn0 = le64_to_cpu(r->lcn);
|
||
|
u64 lcn_e = lcn0 + le64_to_cpu(r->len) - 1;
|
||
|
|
||
|
dp = NULL;
|
||
|
while ((dp = enum_rstbl(dptbl, dp))) {
|
||
|
u32 j;
|
||
|
|
||
|
t32 = le32_to_cpu(dp->lcns_follow);
|
||
|
for (j = 0; j < t32; j++) {
|
||
|
t64 = le64_to_cpu(dp->page_lcns[j]);
|
||
|
if (t64 >= lcn0 && t64 <= lcn_e)
|
||
|
dp->page_lcns[j] = 0;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
goto next_log_record_analyze;
|
||
|
;
|
||
|
}
|
||
|
|
||
|
case OpenNonresidentAttribute:
|
||
|
t16 = le16_to_cpu(lrh->target_attr);
|
||
|
if (t16 >= bytes_per_rt(oatbl)) {
|
||
|
/*
|
||
|
* Compute how big the table needs to be.
|
||
|
* Add 10 extra entries for some cushion.
|
||
|
*/
|
||
|
u32 new_e = t16 / le16_to_cpu(oatbl->size);
|
||
|
|
||
|
new_e += 10 - le16_to_cpu(oatbl->used);
|
||
|
|
||
|
oatbl = extend_rsttbl(oatbl, new_e, ~0u);
|
||
|
log->open_attr_tbl = oatbl;
|
||
|
if (!oatbl) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* Point to the entry being opened. */
|
||
|
oe = alloc_rsttbl_from_idx(&oatbl, t16);
|
||
|
log->open_attr_tbl = oatbl;
|
||
|
if (!oe) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* Initialize this entry from the log record. */
|
||
|
t16 = le16_to_cpu(lrh->redo_off);
|
||
|
if (!rst->major_ver) {
|
||
|
/* Convert version '0' into version '1'. */
|
||
|
struct OPEN_ATTR_ENRTY_32 *oe0 = Add2Ptr(lrh, t16);
|
||
|
|
||
|
oe->bytes_per_index = oe0->bytes_per_index;
|
||
|
oe->type = oe0->type;
|
||
|
oe->is_dirty_pages = oe0->is_dirty_pages;
|
||
|
oe->name_len = 0; //oe0.name_len;
|
||
|
oe->ref = oe0->ref;
|
||
|
oe->open_record_lsn = oe0->open_record_lsn;
|
||
|
} else {
|
||
|
memcpy(oe, Add2Ptr(lrh, t16), bytes_per_attr_entry);
|
||
|
}
|
||
|
|
||
|
t16 = le16_to_cpu(lrh->undo_len);
|
||
|
if (t16) {
|
||
|
oe->ptr = kmalloc(t16, GFP_NOFS);
|
||
|
if (!oe->ptr) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
oe->name_len = t16 / sizeof(short);
|
||
|
memcpy(oe->ptr,
|
||
|
Add2Ptr(lrh, le16_to_cpu(lrh->undo_off)), t16);
|
||
|
oe->is_attr_name = 1;
|
||
|
} else {
|
||
|
oe->ptr = NULL;
|
||
|
oe->is_attr_name = 0;
|
||
|
}
|
||
|
|
||
|
goto next_log_record_analyze;
|
||
|
|
||
|
case HotFix:
|
||
|
t16 = le16_to_cpu(lrh->target_attr);
|
||
|
t64 = le64_to_cpu(lrh->target_vcn);
|
||
|
dp = find_dp(dptbl, t16, t64);
|
||
|
if (dp) {
|
||
|
size_t j = le64_to_cpu(lrh->target_vcn) -
|
||
|
le64_to_cpu(dp->vcn);
|
||
|
if (dp->page_lcns[j])
|
||
|
dp->page_lcns[j] = lrh->page_lcns[0];
|
||
|
}
|
||
|
goto next_log_record_analyze;
|
||
|
|
||
|
case EndTopLevelAction:
|
||
|
tr = Add2Ptr(trtbl, transact_id);
|
||
|
tr->prev_lsn = cpu_to_le64(rec_lsn);
|
||
|
tr->undo_next_lsn = frh->client_undo_next_lsn;
|
||
|
goto next_log_record_analyze;
|
||
|
|
||
|
case PrepareTransaction:
|
||
|
tr = Add2Ptr(trtbl, transact_id);
|
||
|
tr->transact_state = TransactionPrepared;
|
||
|
goto next_log_record_analyze;
|
||
|
|
||
|
case CommitTransaction:
|
||
|
tr = Add2Ptr(trtbl, transact_id);
|
||
|
tr->transact_state = TransactionCommitted;
|
||
|
goto next_log_record_analyze;
|
||
|
|
||
|
case ForgetTransaction:
|
||
|
free_rsttbl_idx(trtbl, transact_id);
|
||
|
goto next_log_record_analyze;
|
||
|
|
||
|
case Noop:
|
||
|
case OpenAttributeTableDump:
|
||
|
case AttributeNamesDump:
|
||
|
case DirtyPageTableDump:
|
||
|
case TransactionTableDump:
|
||
|
/* The following cases require no action the Analysis Pass. */
|
||
|
goto next_log_record_analyze;
|
||
|
|
||
|
default:
|
||
|
/*
|
||
|
* All codes will be explicitly handled.
|
||
|
* If we see a code we do not expect, then we are trouble.
|
||
|
*/
|
||
|
goto next_log_record_analyze;
|
||
|
}
|
||
|
|
||
|
end_log_records_enumerate:
|
||
|
lcb_put(lcb);
|
||
|
lcb = NULL;
|
||
|
|
||
|
/*
|
||
|
* Scan the Dirty Page Table and Transaction Table for
|
||
|
* the lowest lsn, and return it as the Redo lsn.
|
||
|
*/
|
||
|
dp = NULL;
|
||
|
while ((dp = enum_rstbl(dptbl, dp))) {
|
||
|
t64 = le64_to_cpu(dp->oldest_lsn);
|
||
|
if (t64 && t64 < rlsn)
|
||
|
rlsn = t64;
|
||
|
}
|
||
|
|
||
|
tr = NULL;
|
||
|
while ((tr = enum_rstbl(trtbl, tr))) {
|
||
|
t64 = le64_to_cpu(tr->first_lsn);
|
||
|
if (t64 && t64 < rlsn)
|
||
|
rlsn = t64;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Only proceed if the Dirty Page Table or Transaction
|
||
|
* table are not empty.
|
||
|
*/
|
||
|
if ((!dptbl || !dptbl->total) && (!trtbl || !trtbl->total))
|
||
|
goto end_reply;
|
||
|
|
||
|
sbi->flags |= NTFS_FLAGS_NEED_REPLAY;
|
||
|
if (is_ro)
|
||
|
goto out;
|
||
|
|
||
|
/* Reopen all of the attributes with dirty pages. */
|
||
|
oe = NULL;
|
||
|
next_open_attribute:
|
||
|
|
||
|
oe = enum_rstbl(oatbl, oe);
|
||
|
if (!oe) {
|
||
|
err = 0;
|
||
|
dp = NULL;
|
||
|
goto next_dirty_page;
|
||
|
}
|
||
|
|
||
|
oa = kzalloc(sizeof(struct OpenAttr), GFP_NOFS);
|
||
|
if (!oa) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
inode = ntfs_iget5(sbi->sb, &oe->ref, NULL);
|
||
|
if (IS_ERR(inode))
|
||
|
goto fake_attr;
|
||
|
|
||
|
if (is_bad_inode(inode)) {
|
||
|
iput(inode);
|
||
|
fake_attr:
|
||
|
if (oa->ni) {
|
||
|
iput(&oa->ni->vfs_inode);
|
||
|
oa->ni = NULL;
|
||
|
}
|
||
|
|
||
|
attr = attr_create_nonres_log(sbi, oe->type, 0, oe->ptr,
|
||
|
oe->name_len, 0);
|
||
|
if (!attr) {
|
||
|
kfree(oa);
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
oa->attr = attr;
|
||
|
oa->run1 = &oa->run0;
|
||
|
goto final_oe;
|
||
|
}
|
||
|
|
||
|
ni_oe = ntfs_i(inode);
|
||
|
oa->ni = ni_oe;
|
||
|
|
||
|
attr = ni_find_attr(ni_oe, NULL, NULL, oe->type, oe->ptr, oe->name_len,
|
||
|
NULL, NULL);
|
||
|
|
||
|
if (!attr)
|
||
|
goto fake_attr;
|
||
|
|
||
|
t32 = le32_to_cpu(attr->size);
|
||
|
oa->attr = kmemdup(attr, t32, GFP_NOFS);
|
||
|
if (!oa->attr)
|
||
|
goto fake_attr;
|
||
|
|
||
|
if (!S_ISDIR(inode->i_mode)) {
|
||
|
if (attr->type == ATTR_DATA && !attr->name_len) {
|
||
|
oa->run1 = &ni_oe->file.run;
|
||
|
goto final_oe;
|
||
|
}
|
||
|
} else {
|
||
|
if (attr->type == ATTR_ALLOC &&
|
||
|
attr->name_len == ARRAY_SIZE(I30_NAME) &&
|
||
|
!memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME))) {
|
||
|
oa->run1 = &ni_oe->dir.alloc_run;
|
||
|
goto final_oe;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (attr->non_res) {
|
||
|
u16 roff = le16_to_cpu(attr->nres.run_off);
|
||
|
CLST svcn = le64_to_cpu(attr->nres.svcn);
|
||
|
|
||
|
if (roff > t32) {
|
||
|
kfree(oa->attr);
|
||
|
oa->attr = NULL;
|
||
|
goto fake_attr;
|
||
|
}
|
||
|
|
||
|
err = run_unpack(&oa->run0, sbi, inode->i_ino, svcn,
|
||
|
le64_to_cpu(attr->nres.evcn), svcn,
|
||
|
Add2Ptr(attr, roff), t32 - roff);
|
||
|
if (err < 0) {
|
||
|
kfree(oa->attr);
|
||
|
oa->attr = NULL;
|
||
|
goto fake_attr;
|
||
|
}
|
||
|
err = 0;
|
||
|
}
|
||
|
oa->run1 = &oa->run0;
|
||
|
attr = oa->attr;
|
||
|
|
||
|
final_oe:
|
||
|
if (oe->is_attr_name == 1)
|
||
|
kfree(oe->ptr);
|
||
|
oe->is_attr_name = 0;
|
||
|
oe->ptr = oa;
|
||
|
oe->name_len = attr->name_len;
|
||
|
|
||
|
goto next_open_attribute;
|
||
|
|
||
|
/*
|
||
|
* Now loop through the dirty page table to extract all of the Vcn/Lcn.
|
||
|
* Mapping that we have, and insert it into the appropriate run.
|
||
|
*/
|
||
|
next_dirty_page:
|
||
|
dp = enum_rstbl(dptbl, dp);
|
||
|
if (!dp)
|
||
|
goto do_redo_1;
|
||
|
|
||
|
oe = Add2Ptr(oatbl, le32_to_cpu(dp->target_attr));
|
||
|
|
||
|
if (oe->next != RESTART_ENTRY_ALLOCATED_LE)
|
||
|
goto next_dirty_page;
|
||
|
|
||
|
oa = oe->ptr;
|
||
|
if (!oa)
|
||
|
goto next_dirty_page;
|
||
|
|
||
|
i = -1;
|
||
|
next_dirty_page_vcn:
|
||
|
i += 1;
|
||
|
if (i >= le32_to_cpu(dp->lcns_follow))
|
||
|
goto next_dirty_page;
|
||
|
|
||
|
vcn = le64_to_cpu(dp->vcn) + i;
|
||
|
size = (vcn + 1) << sbi->cluster_bits;
|
||
|
|
||
|
if (!dp->page_lcns[i])
|
||
|
goto next_dirty_page_vcn;
|
||
|
|
||
|
rno = ino_get(&oe->ref);
|
||
|
if (rno <= MFT_REC_MIRR &&
|
||
|
size < (MFT_REC_VOL + 1) * sbi->record_size &&
|
||
|
oe->type == ATTR_DATA) {
|
||
|
goto next_dirty_page_vcn;
|
||
|
}
|
||
|
|
||
|
lcn = le64_to_cpu(dp->page_lcns[i]);
|
||
|
|
||
|
if ((!run_lookup_entry(oa->run1, vcn, &lcn0, &len0, NULL) ||
|
||
|
lcn0 != lcn) &&
|
||
|
!run_add_entry(oa->run1, vcn, lcn, 1, false)) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
attr = oa->attr;
|
||
|
t64 = le64_to_cpu(attr->nres.alloc_size);
|
||
|
if (size > t64) {
|
||
|
attr->nres.valid_size = attr->nres.data_size =
|
||
|
attr->nres.alloc_size = cpu_to_le64(size);
|
||
|
}
|
||
|
goto next_dirty_page_vcn;
|
||
|
|
||
|
do_redo_1:
|
||
|
/*
|
||
|
* Perform the Redo Pass, to restore all of the dirty pages to the same
|
||
|
* contents that they had immediately before the crash. If the dirty
|
||
|
* page table is empty, then we can skip the entire Redo Pass.
|
||
|
*/
|
||
|
if (!dptbl || !dptbl->total)
|
||
|
goto do_undo_action;
|
||
|
|
||
|
rec_lsn = rlsn;
|
||
|
|
||
|
/*
|
||
|
* Read the record at the Redo lsn, before falling
|
||
|
* into common code to handle each record.
|
||
|
*/
|
||
|
err = read_log_rec_lcb(log, rlsn, lcb_ctx_next, &lcb);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
/*
|
||
|
* Now loop to read all of our log records forwards, until
|
||
|
* we hit the end of the file, cleaning up at the end.
|
||
|
*/
|
||
|
do_action_next:
|
||
|
frh = lcb->lrh;
|
||
|
|
||
|
if (LfsClientRecord != frh->record_type)
|
||
|
goto read_next_log_do_action;
|
||
|
|
||
|
transact_id = le32_to_cpu(frh->transact_id);
|
||
|
rec_len = le32_to_cpu(frh->client_data_len);
|
||
|
lrh = lcb->log_rec;
|
||
|
|
||
|
if (!check_log_rec(lrh, rec_len, transact_id, bytes_per_attr_entry)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* Ignore log records that do not update pages. */
|
||
|
if (lrh->lcns_follow)
|
||
|
goto find_dirty_page;
|
||
|
|
||
|
goto read_next_log_do_action;
|
||
|
|
||
|
find_dirty_page:
|
||
|
t16 = le16_to_cpu(lrh->target_attr);
|
||
|
t64 = le64_to_cpu(lrh->target_vcn);
|
||
|
dp = find_dp(dptbl, t16, t64);
|
||
|
|
||
|
if (!dp)
|
||
|
goto read_next_log_do_action;
|
||
|
|
||
|
if (rec_lsn < le64_to_cpu(dp->oldest_lsn))
|
||
|
goto read_next_log_do_action;
|
||
|
|
||
|
t16 = le16_to_cpu(lrh->target_attr);
|
||
|
if (t16 >= bytes_per_rt(oatbl)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
oe = Add2Ptr(oatbl, t16);
|
||
|
|
||
|
if (oe->next != RESTART_ENTRY_ALLOCATED_LE) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
oa = oe->ptr;
|
||
|
|
||
|
if (!oa) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
attr = oa->attr;
|
||
|
|
||
|
vcn = le64_to_cpu(lrh->target_vcn);
|
||
|
|
||
|
if (!run_lookup_entry(oa->run1, vcn, &lcn, NULL, NULL) ||
|
||
|
lcn == SPARSE_LCN) {
|
||
|
goto read_next_log_do_action;
|
||
|
}
|
||
|
|
||
|
/* Point to the Redo data and get its length. */
|
||
|
data = Add2Ptr(lrh, le16_to_cpu(lrh->redo_off));
|
||
|
dlen = le16_to_cpu(lrh->redo_len);
|
||
|
|
||
|
/* Shorten length by any Lcns which were deleted. */
|
||
|
saved_len = dlen;
|
||
|
|
||
|
for (i = le16_to_cpu(lrh->lcns_follow); i; i--) {
|
||
|
size_t j;
|
||
|
u32 alen, voff;
|
||
|
|
||
|
voff = le16_to_cpu(lrh->record_off) +
|
||
|
le16_to_cpu(lrh->attr_off);
|
||
|
voff += le16_to_cpu(lrh->cluster_off) << SECTOR_SHIFT;
|
||
|
|
||
|
/* If the Vcn question is allocated, we can just get out. */
|
||
|
j = le64_to_cpu(lrh->target_vcn) - le64_to_cpu(dp->vcn);
|
||
|
if (dp->page_lcns[j + i - 1])
|
||
|
break;
|
||
|
|
||
|
if (!saved_len)
|
||
|
saved_len = 1;
|
||
|
|
||
|
/*
|
||
|
* Calculate the allocated space left relative to the
|
||
|
* log record Vcn, after removing this unallocated Vcn.
|
||
|
*/
|
||
|
alen = (i - 1) << sbi->cluster_bits;
|
||
|
|
||
|
/*
|
||
|
* If the update described this log record goes beyond
|
||
|
* the allocated space, then we will have to reduce the length.
|
||
|
*/
|
||
|
if (voff >= alen)
|
||
|
dlen = 0;
|
||
|
else if (voff + dlen > alen)
|
||
|
dlen = alen - voff;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If the resulting dlen from above is now zero,
|
||
|
* we can skip this log record.
|
||
|
*/
|
||
|
if (!dlen && saved_len)
|
||
|
goto read_next_log_do_action;
|
||
|
|
||
|
t16 = le16_to_cpu(lrh->redo_op);
|
||
|
if (can_skip_action(t16))
|
||
|
goto read_next_log_do_action;
|
||
|
|
||
|
/* Apply the Redo operation a common routine. */
|
||
|
err = do_action(log, oe, lrh, t16, data, dlen, rec_len, &rec_lsn);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
/* Keep reading and looping back until end of file. */
|
||
|
read_next_log_do_action:
|
||
|
err = read_next_log_rec(log, lcb, &rec_lsn);
|
||
|
if (!err && rec_lsn)
|
||
|
goto do_action_next;
|
||
|
|
||
|
lcb_put(lcb);
|
||
|
lcb = NULL;
|
||
|
|
||
|
do_undo_action:
|
||
|
/* Scan Transaction Table. */
|
||
|
tr = NULL;
|
||
|
transaction_table_next:
|
||
|
tr = enum_rstbl(trtbl, tr);
|
||
|
if (!tr)
|
||
|
goto undo_action_done;
|
||
|
|
||
|
if (TransactionActive != tr->transact_state || !tr->undo_next_lsn) {
|
||
|
free_rsttbl_idx(trtbl, PtrOffset(trtbl, tr));
|
||
|
goto transaction_table_next;
|
||
|
}
|
||
|
|
||
|
log->transaction_id = PtrOffset(trtbl, tr);
|
||
|
undo_next_lsn = le64_to_cpu(tr->undo_next_lsn);
|
||
|
|
||
|
/*
|
||
|
* We only have to do anything if the transaction has
|
||
|
* something its undo_next_lsn field.
|
||
|
*/
|
||
|
if (!undo_next_lsn)
|
||
|
goto commit_undo;
|
||
|
|
||
|
/* Read the first record to be undone by this transaction. */
|
||
|
err = read_log_rec_lcb(log, undo_next_lsn, lcb_ctx_undo_next, &lcb);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
/*
|
||
|
* Now loop to read all of our log records forwards,
|
||
|
* until we hit the end of the file, cleaning up at the end.
|
||
|
*/
|
||
|
undo_action_next:
|
||
|
|
||
|
lrh = lcb->log_rec;
|
||
|
frh = lcb->lrh;
|
||
|
transact_id = le32_to_cpu(frh->transact_id);
|
||
|
rec_len = le32_to_cpu(frh->client_data_len);
|
||
|
|
||
|
if (!check_log_rec(lrh, rec_len, transact_id, bytes_per_attr_entry)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (lrh->undo_op == cpu_to_le16(Noop))
|
||
|
goto read_next_log_undo_action;
|
||
|
|
||
|
oe = Add2Ptr(oatbl, le16_to_cpu(lrh->target_attr));
|
||
|
oa = oe->ptr;
|
||
|
|
||
|
t16 = le16_to_cpu(lrh->lcns_follow);
|
||
|
if (!t16)
|
||
|
goto add_allocated_vcns;
|
||
|
|
||
|
is_mapped = run_lookup_entry(oa->run1, le64_to_cpu(lrh->target_vcn),
|
||
|
&lcn, &clen, NULL);
|
||
|
|
||
|
/*
|
||
|
* If the mapping isn't already the table or the mapping
|
||
|
* corresponds to a hole the mapping, we need to make sure
|
||
|
* there is no partial page already memory.
|
||
|
*/
|
||
|
if (is_mapped && lcn != SPARSE_LCN && clen >= t16)
|
||
|
goto add_allocated_vcns;
|
||
|
|
||
|
vcn = le64_to_cpu(lrh->target_vcn);
|
||
|
vcn &= ~(u64)(log->clst_per_page - 1);
|
||
|
|
||
|
add_allocated_vcns:
|
||
|
for (i = 0, vcn = le64_to_cpu(lrh->target_vcn),
|
||
|
size = (vcn + 1) << sbi->cluster_bits;
|
||
|
i < t16; i++, vcn += 1, size += sbi->cluster_size) {
|
||
|
attr = oa->attr;
|
||
|
if (!attr->non_res) {
|
||
|
if (size > le32_to_cpu(attr->res.data_size))
|
||
|
attr->res.data_size = cpu_to_le32(size);
|
||
|
} else {
|
||
|
if (size > le64_to_cpu(attr->nres.data_size))
|
||
|
attr->nres.valid_size = attr->nres.data_size =
|
||
|
attr->nres.alloc_size =
|
||
|
cpu_to_le64(size);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
t16 = le16_to_cpu(lrh->undo_op);
|
||
|
if (can_skip_action(t16))
|
||
|
goto read_next_log_undo_action;
|
||
|
|
||
|
/* Point to the Redo data and get its length. */
|
||
|
data = Add2Ptr(lrh, le16_to_cpu(lrh->undo_off));
|
||
|
dlen = le16_to_cpu(lrh->undo_len);
|
||
|
|
||
|
/* It is time to apply the undo action. */
|
||
|
err = do_action(log, oe, lrh, t16, data, dlen, rec_len, NULL);
|
||
|
|
||
|
read_next_log_undo_action:
|
||
|
/*
|
||
|
* Keep reading and looping back until we have read the
|
||
|
* last record for this transaction.
|
||
|
*/
|
||
|
err = read_next_log_rec(log, lcb, &rec_lsn);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
if (rec_lsn)
|
||
|
goto undo_action_next;
|
||
|
|
||
|
lcb_put(lcb);
|
||
|
lcb = NULL;
|
||
|
|
||
|
commit_undo:
|
||
|
free_rsttbl_idx(trtbl, log->transaction_id);
|
||
|
|
||
|
log->transaction_id = 0;
|
||
|
|
||
|
goto transaction_table_next;
|
||
|
|
||
|
undo_action_done:
|
||
|
|
||
|
ntfs_update_mftmirr(sbi, 0);
|
||
|
|
||
|
sbi->flags &= ~NTFS_FLAGS_NEED_REPLAY;
|
||
|
|
||
|
end_reply:
|
||
|
|
||
|
err = 0;
|
||
|
if (is_ro)
|
||
|
goto out;
|
||
|
|
||
|
rh = kzalloc(log->page_size, GFP_NOFS);
|
||
|
if (!rh) {
|
||
|
err = -ENOMEM;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
rh->rhdr.sign = NTFS_RSTR_SIGNATURE;
|
||
|
rh->rhdr.fix_off = cpu_to_le16(offsetof(struct RESTART_HDR, fixups));
|
||
|
t16 = (log->page_size >> SECTOR_SHIFT) + 1;
|
||
|
rh->rhdr.fix_num = cpu_to_le16(t16);
|
||
|
rh->sys_page_size = cpu_to_le32(log->page_size);
|
||
|
rh->page_size = cpu_to_le32(log->page_size);
|
||
|
|
||
|
t16 = ALIGN(offsetof(struct RESTART_HDR, fixups) + sizeof(short) * t16,
|
||
|
8);
|
||
|
rh->ra_off = cpu_to_le16(t16);
|
||
|
rh->minor_ver = cpu_to_le16(1); // 0x1A:
|
||
|
rh->major_ver = cpu_to_le16(1); // 0x1C:
|
||
|
|
||
|
ra2 = Add2Ptr(rh, t16);
|
||
|
memcpy(ra2, ra, sizeof(struct RESTART_AREA));
|
||
|
|
||
|
ra2->client_idx[0] = 0;
|
||
|
ra2->client_idx[1] = LFS_NO_CLIENT_LE;
|
||
|
ra2->flags = cpu_to_le16(2);
|
||
|
|
||
|
le32_add_cpu(&ra2->open_log_count, 1);
|
||
|
|
||
|
ntfs_fix_pre_write(&rh->rhdr, log->page_size);
|
||
|
|
||
|
err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rh, log->page_size, 0);
|
||
|
if (!err)
|
||
|
err = ntfs_sb_write_run(sbi, &log->ni->file.run, log->page_size,
|
||
|
rh, log->page_size, 0);
|
||
|
|
||
|
kfree(rh);
|
||
|
if (err)
|
||
|
goto out;
|
||
|
|
||
|
out:
|
||
|
kfree(rst);
|
||
|
if (lcb)
|
||
|
lcb_put(lcb);
|
||
|
|
||
|
/*
|
||
|
* Scan the Open Attribute Table to close all of
|
||
|
* the open attributes.
|
||
|
*/
|
||
|
oe = NULL;
|
||
|
while ((oe = enum_rstbl(oatbl, oe))) {
|
||
|
rno = ino_get(&oe->ref);
|
||
|
|
||
|
if (oe->is_attr_name == 1) {
|
||
|
kfree(oe->ptr);
|
||
|
oe->ptr = NULL;
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
if (oe->is_attr_name)
|
||
|
continue;
|
||
|
|
||
|
oa = oe->ptr;
|
||
|
if (!oa)
|
||
|
continue;
|
||
|
|
||
|
run_close(&oa->run0);
|
||
|
kfree(oa->attr);
|
||
|
if (oa->ni)
|
||
|
iput(&oa->ni->vfs_inode);
|
||
|
kfree(oa);
|
||
|
}
|
||
|
|
||
|
kfree(trtbl);
|
||
|
kfree(oatbl);
|
||
|
kfree(dptbl);
|
||
|
kfree(attr_names);
|
||
|
kfree(rst_info.r_page);
|
||
|
|
||
|
kfree(ra);
|
||
|
kfree(log->one_page_buf);
|
||
|
|
||
|
if (err)
|
||
|
sbi->flags |= NTFS_FLAGS_NEED_REPLAY;
|
||
|
|
||
|
if (err == -EROFS)
|
||
|
err = 0;
|
||
|
else if (log->set_dirty)
|
||
|
ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
|
||
|
|
||
|
kfree(log);
|
||
|
|
||
|
return err;
|
||
|
}
|