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a=ed25519-sha256; c=relaxed/relaxed; t=1688014741; s=strato-dkim-0003; d=xenosoft.de; h=Subject:From:Cc:To:Date:Message-ID:Cc:Date:From:Subject:Sender; bh=+7c6Cd18dRPSY9T1tbPIe2oEVQE8kMzaSrsxr6FZTcE=; b=SQYiCnb92CJ1SziwXDusRlAzzm2Xh0CEhZM3Hvjo1h1EtZfNRJOkA5/GX7cm310n5w KCbJGIu9IyLLzT/5A6Bw== X-RZG-AUTH: ":L2QefEenb+UdBJSdRCXu93KJ1bmSGnhMdmOod1DhGM4l4Hio94KKxRySfLxnHfJ+Dkjp5DdBfio0GngadwiA6YFcQgU5MFYhNcGi40kecMvJRQ==" Received: from [IPV6:2a02:8109:8980:4474:e043:b28b:9d80:cfa4] by smtp.strato.de (RZmta 49.6.0 AUTH) with ESMTPSA id N28a51z5T4x0krw (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Thu, 29 Jun 2023 06:59:00 +0200 (CEST) Message-ID: <024ce4fa-cc6d-50a2-9aae-3701d0ebf668@xenosoft.de> Date: Thu, 29 Jun 2023 06:59:00 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Content-Language: de-DE To: schmitzmic@gmail.com From: Christian Zigotzky Subject: [FSL P50x0] [PASEMI] The Access to partitions on disks with an Amiga partition table doesn't work anymore after the block updates 2023-06-23 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: axboe@kernel.dk, linux-m68k@vger.kernel.org, Darren Stevens , mad skateman , linux-block@vger.kernel.org, Geert Uytterhoeven , "R.T.Dickinson" , linuxppc-dev , Christoph Hellwig Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Hello, The access  to partitions on disks with an Amiga partition table (via the Rigid Disk Block RDB) doesn't work anymore on my Cyrus+ board with a FSL P50x0 PowerPC SoC [1] and on my P.A. Semi Nemo board [2] after the block updates 2023-06-23 [3]. parted -l Model: ATA ST2000DM001-9YN1 (scsi) Disk /dev/sda: 2000GB Sector size (logical/physical): 512B/4096B Partition Table: amiga Disk Flags: Number  Start   End     Size    File system  Name  Flags  1      1057kB  123MB   122MB   affs7        BDH0  hidden  2      123MB   2274MB  2150MB               DH0   boot  3      2274MB  691GB   689GB                DH2  4      691GB   1992GB  1301GB  ext4         dhx   boot dmesg | grep -i sda [    4.208905] sd 0:0:0:0: [sda] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB) [    4.253995] sd 0:0:0:0: [sda] 4096-byte physical blocks [    4.254826] sd 0:0:0:0: [sda] Write Protect is off [    4.300069] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 [    4.486476] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [    4.580507] sd 0:0:0:0: [sda] Preferred minimum I/O size 4096 bytes [    4.712624] Dev sda: unable to read partition block 4294967295 [    4.761532]  sda: RDSK (512) sda1 (DOS^G)(res 2 spb 2) sda2 (SFS^B)(res 2 spb 1) sda3 (SFS^B)(res 2 spb 2) sda4 ((res 2 spb 1) unable to read partition table [    4.761892] sda: partition table beyond EOD, [    4.861681] Dev sda: unable to read partition block 4294967295 [    4.912094]  sda: RDSK (512) sda1 (DOS^G)(res 2 spb 2) sda2 (SFS^B)(res 2 spb 1) sda3 (SFS^B)(res 2 spb 2) sda4 ((res 2 spb 1) unable to read partition table [    4.963387] sda: partition table beyond EOD, [    5.014769] sd 0:0:0:0: [sda] Attached SCSI disk I created a patch for reverting the commit. [4] The access works again with this patch: [    0.000000] Kernel command line: root=/dev/sda4 [    3.987717] sd 0:0:0:0: [sda] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB) [    4.031349] sd 0:0:0:0: [sda] 4096-byte physical blocks [    4.123773] sd 0:0:0:0: [sda] Write Protect is off [    4.168682] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 [    4.279304] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [    4.463508] sd 0:0:0:0: [sda] Preferred minimum I/O size 4096 bytes [    4.519477]  sda: RDSK (512) sda1 (DOS^G)(res 2 spb 2) sda2 (SFS^B)(res 2 spb 1) sda3 (SFS^B)(res 2 spb 2) sda4 ((res 2 spb 1) [    4.720896] sda: p4 size 18446744071956107760 extends beyond EOD, [    4.922550]  sda: RDSK (512) sda1 (DOS^G)(res 2 spb 2) sda2 (SFS^B)(res 2 spb 1) sda3 (SFS^B)(res 2 spb 2) sda4 ((res 2 spb 1) [    4.948655] sda: p4 size 18446744071956107760 extends beyond EOD, truncated [    4.998956] sd 0:0:0:0: [sda] Attached SCSI disk [    8.394695] EXT4-fs (sda4): mounted filesystem 93cb7dd2-ce1b-4bf5-ba47-818cf8e8c9f4 ro with ordered data mode. Quota mode: none. [   18.578020] EXT4-fs (sda4): re-mounted 93cb7dd2-ce1b-4bf5-ba47-818cf8e8c9f4 ro. Quota mode: none. [   23.159524] EXT4-fs (sda4): re-mounted 93cb7dd2-ce1b-4bf5-ba47-818cf8e8c9f4 r/w. Quota mode: none. Could you please check your commit? Thanks, Christian [1] http://wiki.amiga.org/index.php?title=X5000 [2] https://en.wikipedia.org/wiki/AmigaOne_X1000 [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a0433f8cae3ac51f59b4b1863032822aaa2d8164 [4] revert_amiga.c.patch:      } @@ -91,15 +79,10 @@ int amiga_partition(struct parsed_partit      blk = be32_to_cpu(rdb->rdb_PartitionList);      put_dev_sector(sect);      for (part = 1; blk>0 && part<=16; part++, put_dev_sector(sect)) { -        /* Read in terms partition table understands */ -        if (check_mul_overflow(blk, (sector_t) blksize, &blk)) { -            pr_err("Dev %s: overflow calculating partition block %llu! Skipping partitions %u and beyond\n", -                state->disk->disk_name, blk, part); -            break; -        } +        blk *= blksize;    /* Read in terms partition table understands */          data = read_part_sector(state, blk, §);          if (!data) { -            pr_err("Dev %s: unable to read partition block %llu\n", +            pr_err("Dev %s: unable to read partition block %d\n",                     state->disk->disk_name, blk);              res = -1;              goto rdb_done; @@ -111,70 +94,19 @@ int amiga_partition(struct parsed_partit          if (checksum_block((__be32 *)pb, be32_to_cpu(pb->pb_SummedLongs) & 0x7F) != 0 )              continue; -        /* RDB gives us more than enough rope to hang ourselves with, -         * many times over (2^128 bytes if all fields max out). -         * Some careful checks are in order, so check for potential -         * overflows. -         * We are multiplying four 32 bit numbers to one sector_t! -         */ - -        nr_hd   = be32_to_cpu(pb->pb_Environment[NR_HD]); -        nr_sect = be32_to_cpu(pb->pb_Environment[NR_SECT]); - -        /* CylBlocks is total number of blocks per cylinder */ -        if (check_mul_overflow(nr_hd, nr_sect, &cylblk)) { -            pr_err("Dev %s: heads*sects %u overflows u32, skipping partition!\n", -                state->disk->disk_name, cylblk); -            continue; -        } - -        /* check for consistency with RDB defined CylBlocks */ -        if (cylblk > be32_to_cpu(rdb->rdb_CylBlocks)) { -            pr_warn("Dev %s: cylblk %u > rdb_CylBlocks %u!\n", -                state->disk->disk_name, cylblk, -                be32_to_cpu(rdb->rdb_CylBlocks)); -        } - -        /* RDB allows for variable logical block size - -         * normalize to 512 byte blocks and check result. -         */ - -        if (check_mul_overflow(cylblk, blksize, &cylblk)) { -            pr_err("Dev %s: partition %u bytes per cyl. overflows u32, skipping partition!\n", -                state->disk->disk_name, part); -            continue; -        } - -        /* Calculate partition start and end. Limit of 32 bit on cylblk -         * guarantees no overflow occurs if LBD support is enabled. -         */ - -        lo_cyl = be32_to_cpu(pb->pb_Environment[LO_CYL]); -        start_sect = ((u64) lo_cyl * cylblk); - -        hi_cyl = be32_to_cpu(pb->pb_Environment[HI_CYL]); -        nr_sects = (((u64) hi_cyl - lo_cyl + 1) * cylblk); +        /* Tell Kernel about it */ +        nr_sects = (be32_to_cpu(pb->pb_Environment[10]) + 1 - +                be32_to_cpu(pb->pb_Environment[9])) * +               be32_to_cpu(pb->pb_Environment[3]) * +               be32_to_cpu(pb->pb_Environment[5]) * +               blksize;          if (!nr_sects)              continue; - -        /* Warn user if partition end overflows u32 (AmigaDOS limit) */ - -        if ((start_sect + nr_sects) > UINT_MAX) { -            pr_warn("Dev %s: partition %u (%llu-%llu) needs 64 bit device support!\n", -                state->disk->disk_name, part, -                start_sect, start_sect + nr_sects); -        } - -        if (check_add_overflow(start_sect, nr_sects, &end_sect)) { -            pr_err("Dev %s: partition %u (%llu-%llu) needs LBD device support, skipping partition!\n", -                state->disk->disk_name, part, -                start_sect, end_sect); -            continue; -        } - -        /* Tell Kernel about it */ - +        start_sect = be32_to_cpu(pb->pb_Environment[9]) * +                 be32_to_cpu(pb->pb_Environment[3]) * +                 be32_to_cpu(pb->pb_Environment[5]) * +                 blksize;          put_partition(state,slot++,start_sect,nr_sects);          {              /* Be even more informative to aid mounting */ --- a/block/partitions/amiga.c    2023-06-29 04:29:22.947100347 +0200 +++ b/block/partitions/amiga.c    2023-06-26 01:29:58.000000000 +0200 @@ -11,18 +11,10 @@  #define pr_fmt(fmt) fmt  #include -#include -#include  #include  #include "check.h" -/* magic offsets in partition DosEnvVec */ -#define NR_HD    3 -#define NR_SECT    5 -#define LO_CYL    9 -#define HI_CYL    10 -  static __inline__ u32  checksum_block(__be32 *m, int size)  { @@ -39,12 +31,8 @@ int amiga_partition(struct parsed_partit      unsigned char *data;      struct RigidDiskBlock *rdb;      struct PartitionBlock *pb; -    u64 start_sect, nr_sects; -    sector_t blk, end_sect; -    u32 cylblk;        /* rdb_CylBlocks = nr_heads*sect_per_track */ -    u32 nr_hd, nr_sect, lo_cyl, hi_cyl; -    int part, res = 0; -    unsigned int blksize = 1;    /* Multiplier for disk block size */ +    int start_sect, nr_sects, blk, part, res = 0; +    int blksize = 1;    /* Multiplier for disk block size */      int slot = 1;      for (blk = 0; ; blk++, put_dev_sector(sect)) { @@ -52,7 +40,7 @@ int amiga_partition(struct parsed_partit              goto rdb_done;          data = read_part_sector(state, blk, §);          if (!data) { -            pr_err("Dev %s: unable to read RDB block %llu\n", +            pr_err("Dev %s: unable to read RDB block %d\n",                     state->disk->disk_name, blk);              res = -1;              goto rdb_done; @@ -69,12 +57,12 @@ int amiga_partition(struct parsed_partit          *(__be32 *)(data+0xdc) = 0;          if (checksum_block((__be32 *)data,                  be32_to_cpu(rdb->rdb_SummedLongs) & 0x7F)==0) { -            pr_err("Trashed word at 0xd0 in block %llu ignored in checksum calculation\n", +            pr_err("Trashed word at 0xd0 in block %d ignored in checksum calculation\n",                     blk);              break;          } -        pr_err("Dev %s: RDB in block %llu has bad checksum\n", +        pr_err("Dev %s: RDB in block %d has bad checksum\n",                 state->disk->disk_name, blk);