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[2620:137:e000::1:20]) by mx.google.com with ESMTP id t189-20020a6381c6000000b0051936c543c8si8193428pgd.212.2023.05.08.05.49.10; Mon, 08 May 2023 05:49:25 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@paragon-software.com header.s=mail header.b=YxxnbcMT; dkim=pass header.i=@paragon-software.com header.s=mail header.b="HgClNu2/"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=paragon-software.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234201AbjEHMhr (ORCPT + 99 others); Mon, 8 May 2023 08:37:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38526 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232949AbjEHMhp (ORCPT ); Mon, 8 May 2023 08:37:45 -0400 Received: from relayaws-01.paragon-software.com (relayaws-01.paragon-software.com [35.157.23.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6881B1FCF; Mon, 8 May 2023 05:37:43 -0700 (PDT) Received: from relayfre-01.paragon-software.com (unknown [172.30.72.12]) by relayaws-01.paragon-software.com (Postfix) with ESMTPS id D959E21C3; Mon, 8 May 2023 12:32:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=paragon-software.com; s=mail; t=1683549174; bh=eUdOqgEPzuhDm6m+TY/pQxrmqpwlAoPXqQwZwQwVKkY=; h=Date:Subject:From:To:CC:References:In-Reply-To; b=YxxnbcMTWh4mPw9jfZnz2qtaaE5AKm89YFCKlmka7B2ABUXDCnuRFM+YZRqEYPRRA cjSDow7lrBVbtKBfUaGg6r9QQgVja4CER6+m7RwDrYrb6lc3E8YQmp7oDGtTUe4JdN EbncVRwCMDXO4mpXEVRPLmhqOayU70+JZ3EPAIyQ= Received: from dlg2.mail.paragon-software.com (vdlg-exch-02.paragon-software.com [172.30.1.105]) by relayfre-01.paragon-software.com (Postfix) with ESMTPS id 861E12191; Mon, 8 May 2023 12:37:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=paragon-software.com; s=mail; t=1683549461; bh=eUdOqgEPzuhDm6m+TY/pQxrmqpwlAoPXqQwZwQwVKkY=; h=Date:Subject:From:To:CC:References:In-Reply-To; b=HgClNu2/GVnhUC7bcq6YJjoYakmdbi9vxn15wOUXoU35l5qCHFF2DrDNHy/GYrLmW OHodTeo94tL3x8cqCKd5b9Zy3DB3h3RjybM69L7G6hC69mVW0rHEJxenUGWPCC5CjI Z6hXSAe5sajP2XzLMXRUZd3+9V4pu4NSS5C2i2xA= Received: from [192.168.211.146] (192.168.211.146) by vdlg-exch-02.paragon-software.com (172.30.1.105) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.7; Mon, 8 May 2023 15:37:41 +0300 Message-ID: <24e18e44-b97b-b896-f1b0-0c7e58f23a1c@paragon-software.com> Date: Mon, 8 May 2023 16:37:40 +0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.1 Subject: [PATCH 04/10] fs/ntfs3: Alternative boot if primary boot is corrupted Content-Language: en-US From: Konstantin Komarov To: CC: Linux Kernel Mailing List , References: In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-Originating-IP: [192.168.211.146] X-ClientProxiedBy: vobn-exch-01.paragon-software.com (172.30.72.13) To vdlg-exch-02.paragon-software.com (172.30.1.105) X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some code refactoring added also. Signed-off-by: Konstantin Komarov ---  fs/ntfs3/super.c | 98 +++++++++++++++++++++++++++++++++++-------------  1 file changed, 71 insertions(+), 27 deletions(-) diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index 5158dd31fd97..ecf899d571d8 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -724,6 +724,8 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,      struct MFT_REC *rec;      u16 fn, ao;      u8 cluster_bits; +    u32 boot_off = 0; +    const char *hint = "Primary boot";      sbi->volume.blocks = dev_size >> PAGE_SHIFT; @@ -731,11 +733,12 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,      if (!bh)          return -EIO; +check_boot:      err = -EINVAL; -    boot = (struct NTFS_BOOT *)bh->b_data; +    boot = (struct NTFS_BOOT *)Add2Ptr(bh->b_data, boot_off);      if (memcmp(boot->system_id, "NTFS    ", sizeof("NTFS    ") - 1)) { -        ntfs_err(sb, "Boot's signature is not NTFS."); +        ntfs_err(sb, "%s signature is not NTFS.", hint);          goto out;      } @@ -748,14 +751,16 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,                 boot->bytes_per_sector[0];      if (boot_sector_size < SECTOR_SIZE ||          !is_power_of_2(boot_sector_size)) { -        ntfs_err(sb, "Invalid bytes per sector %u.", boot_sector_size); +        ntfs_err(sb, "%s: invalid bytes per sector %u.", hint, +             boot_sector_size);          goto out;      }      /* cluster size: 512, 1K, 2K, 4K, ... 2M */      sct_per_clst = true_sectors_per_clst(boot);      if ((int)sct_per_clst < 0 || !is_power_of_2(sct_per_clst)) { -        ntfs_err(sb, "Invalid sectors per cluster %u.", sct_per_clst); +        ntfs_err(sb, "%s: invalid sectors per cluster %u.", hint, +             sct_per_clst);          goto out;      } @@ -771,8 +776,8 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,      if (mlcn * sct_per_clst >= sectors || mlcn2 * sct_per_clst >= sectors) {          ntfs_err(              sb, -            "Start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.", -            mlcn, mlcn2, sectors); +            "%s: start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.", +            hint, mlcn, mlcn2, sectors);          goto out;      } @@ -784,7 +789,7 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,      /* Check MFT record size. */      if (record_size < SECTOR_SIZE || !is_power_of_2(record_size)) { -        ntfs_err(sb, "Invalid bytes per MFT record %u (%d).", +        ntfs_err(sb, "%s: invalid bytes per MFT record %u (%d).", hint,               record_size, boot->record_size);          goto out;      } @@ -801,13 +806,13 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,      /* Check index record size. */      if (sbi->index_size < SECTOR_SIZE || !is_power_of_2(sbi->index_size)) { -        ntfs_err(sb, "Invalid bytes per index %u(%d).", sbi->index_size, -             boot->index_size); +        ntfs_err(sb, "%s: invalid bytes per index %u(%d).", hint, +             sbi->index_size, boot->index_size);          goto out;      }      if (sbi->index_size > MAXIMUM_BYTES_PER_INDEX) { -        ntfs_err(sb, "Unsupported bytes per index %u.", +        ntfs_err(sb, "%s: unsupported bytes per index %u.", hint,               sbi->index_size);          goto out;      } @@ -834,7 +839,7 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,      /* Compare boot's cluster and sector. */      if (sbi->cluster_size < boot_sector_size) { -        ntfs_err(sb, "Invalid bytes per cluster (%u).", +        ntfs_err(sb, "%s: invalid bytes per cluster (%u).", hint,               sbi->cluster_size);          goto out;      } @@ -930,7 +935,46 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,      err = 0; +    if (bh->b_blocknr && !sb_rdonly(sb)) { +        /* +          * Alternative boot is ok but primary is not ok. +          * Update primary boot. +         */ +        struct buffer_head *bh0 = sb_getblk(sb, 0); +        if (bh0) { +            if (buffer_locked(bh0)) +                __wait_on_buffer(bh0); + +            lock_buffer(bh0); +            memcpy(bh0->b_data, boot, sizeof(*boot)); +            set_buffer_uptodate(bh0); +            mark_buffer_dirty(bh0); +            unlock_buffer(bh0); +            if (!sync_dirty_buffer(bh0)) +                ntfs_warn(sb, "primary boot is updated"); +            put_bh(bh0); +        } +    } +  out: +    if (err == -EINVAL && !bh->b_blocknr && dev_size > PAGE_SHIFT) { +        u32 block_size = min_t(u32, sector_size, PAGE_SIZE); +        u64 lbo = dev_size - sizeof(*boot); + +        /* +          * Try alternative boot (last sector) +         */ +        brelse(bh); + +        sb_set_blocksize(sb, block_size); +        bh = ntfs_bread(sb, lbo >> blksize_bits(block_size)); +        if (!bh) +            return -EINVAL; + +        boot_off = lbo & (block_size - 1); +        hint = "Alternative boot"; +        goto check_boot; +    }      brelse(bh);      return err; @@ -955,6 +999,7 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)      struct ATTR_DEF_ENTRY *t;      u16 *shared;      struct MFT_REF ref; +    bool ro = sb_rdonly(sb);      ref.high = 0; @@ -1035,6 +1080,10 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)      sbi->volume.minor_ver = info->minor_ver;      sbi->volume.flags = info->flags;      sbi->volume.ni = ni; +    if (info->flags & VOLUME_FLAG_DIRTY) { +        sbi->volume.real_dirty = true; +        ntfs_info(sb, "It is recommened to use chkdsk."); +    }      /* Load $MFTMirr to estimate recs_mirr. */      ref.low = cpu_to_le32(MFT_REC_MIRR); @@ -1069,21 +1118,16 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)      iput(inode); -    if (sbi->flags & NTFS_FLAGS_NEED_REPLAY) { -        if (!sb_rdonly(sb)) { -            ntfs_warn(sb, -                  "failed to replay log file. Can't mount rw!"); -            err = -EINVAL; -            goto out; -        } -    } else if (sbi->volume.flags & VOLUME_FLAG_DIRTY) { -        if (!sb_rdonly(sb) && !options->force) { -            ntfs_warn( -                sb, -                "volume is dirty and \"force\" flag is not set!"); -            err = -EINVAL; -            goto out; -        } +    if ((sbi->flags & NTFS_FLAGS_NEED_REPLAY) && !ro) { +        ntfs_warn(sb, "failed to replay log file. Can't mount rw!"); +        err = -EINVAL; +        goto out; +    } + +    if ((sbi->volume.flags & VOLUME_FLAG_DIRTY) && !ro && !options->force) { +        ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!"); +        err = -EINVAL; +        goto out;      }      /* Load $MFT. */ @@ -1173,7 +1217,7 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)          bad_len += len;          bad_frags += 1; -        if (sb_rdonly(sb)) +        if (ro)              continue;          if (wnd_set_used_safe(&sbi->used.bitmap, lcn, len, &tt) || tt) { -- 2.34.1