From 7926d51f73e0434a6250c2fd1a0555f98d9a62da Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Tue, 4 Jun 2024 22:25:21 -0400 Subject: scsi: sd: Use READ(16) when reading block zero on large capacity disks Commit 321da3dc1f3c ("scsi: sd: usb_storage: uas: Access media prior to querying device properties") triggered a read to LBA 0 before attempting to inquire about device characteristics. This was done because some protocol bridge devices will return generic values until an attached storage device's media has been accessed. Pierre Tomon reported that this change caused problems on a large capacity external drive connected via a bridge device. The bridge in question does not appear to implement the READ(10) command. Issue a READ(16) instead of READ(10) when a device has been identified as preferring 16-byte commands (use_16_for_rw heuristic). Link: https://bugzilla.kernel.org/show_bug.cgi?id=218890 Link: https://lore.kernel.org/r/70dd7ae0-b6b1-48e1-bb59-53b7c7f18274@rowland.harvard.edu Link: https://lore.kernel.org/r/20240605022521.3960956-1-martin.petersen@oracle.com Fixes: 321da3dc1f3c ("scsi: sd: usb_storage: uas: Access media prior to querying device properties") Cc: stable@vger.kernel.org Reported-by: Pierre Tomon Suggested-by: Alan Stern Tested-by: Pierre Tomon Reviewed-by: Bart Van Assche Signed-off-by: Martin K. Petersen --- drivers/scsi/sd.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) (limited to 'drivers/scsi/sd.c') diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 332eb9dac22d..fbc11046bbf6 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3565,16 +3565,23 @@ static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp, static void sd_read_block_zero(struct scsi_disk *sdkp) { - unsigned int buf_len = sdkp->device->sector_size; - char *buffer, cmd[10] = { }; + struct scsi_device *sdev = sdkp->device; + unsigned int buf_len = sdev->sector_size; + u8 *buffer, cmd[16] = { }; buffer = kmalloc(buf_len, GFP_KERNEL); if (!buffer) return; - cmd[0] = READ_10; - put_unaligned_be32(0, &cmd[2]); /* Logical block address 0 */ - put_unaligned_be16(1, &cmd[7]); /* Transfer 1 logical block */ + if (sdev->use_16_for_rw) { + cmd[0] = READ_16; + put_unaligned_be64(0, &cmd[2]); /* Logical block address 0 */ + put_unaligned_be32(1, &cmd[10]);/* Transfer 1 logical block */ + } else { + cmd[0] = READ_10; + put_unaligned_be32(0, &cmd[2]); /* Logical block address 0 */ + put_unaligned_be16(1, &cmd[7]); /* Transfer 1 logical block */ + } scsi_execute_cmd(sdkp->device, cmd, REQ_OP_DRV_IN, buffer, buf_len, SD_TIMEOUT, sdkp->max_retries, NULL); -- cgit v1.2.3 From 633aeefafc9c2a07a76a62be6aac1d73c3e3defa Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Thu, 13 Jun 2024 14:18:26 -0700 Subject: scsi: core: Introduce the BLIST_SKIP_IO_HINTS flag Prepare for skipping the IO Advice Hints Grouping mode page for USB storage devices. Cc: Alan Stern Cc: Joao Machado Cc: Andy Shevchenko Cc: Christian Heusel Cc: stable@vger.kernel.org Fixes: 4f53138fffc2 ("scsi: sd: Translate data lifetime information") Signed-off-by: Bart Van Assche Link: https://lore.kernel.org/r/20240613211828.2077477-2-bvanassche@acm.org Signed-off-by: Martin K. Petersen --- drivers/scsi/sd.c | 4 ++++ include/scsi/scsi_devinfo.h | 4 +++- 2 files changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/sd.c') diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index fbc11046bbf6..fe82baa924f8 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -63,6 +63,7 @@ #include #include #include +#include #include #include #include @@ -3118,6 +3119,9 @@ static void sd_read_io_hints(struct scsi_disk *sdkp, unsigned char *buffer) struct scsi_mode_data data; int res; + if (sdp->sdev_bflags & BLIST_SKIP_IO_HINTS) + return; + res = scsi_mode_sense(sdp, /*dbd=*/0x8, /*modepage=*/0x0a, /*subpage=*/0x05, buffer, SD_BUF_SIZE, SD_TIMEOUT, sdkp->max_retries, &data, &sshdr); diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h index 6b548dc2c496..1d79a3b536ce 100644 --- a/include/scsi/scsi_devinfo.h +++ b/include/scsi/scsi_devinfo.h @@ -69,8 +69,10 @@ #define BLIST_RETRY_ITF ((__force blist_flags_t)(1ULL << 32)) /* Always retry ABORTED_COMMAND with ASC 0xc1 */ #define BLIST_RETRY_ASC_C1 ((__force blist_flags_t)(1ULL << 33)) +/* Do not query the IO Advice Hints Grouping mode page */ +#define BLIST_SKIP_IO_HINTS ((__force blist_flags_t)(1ULL << 34)) -#define __BLIST_LAST_USED BLIST_RETRY_ASC_C1 +#define __BLIST_LAST_USED BLIST_SKIP_IO_HINTS #define __BLIST_HIGH_UNUSED (~(__BLIST_LAST_USED | \ (__force blist_flags_t) \ -- cgit v1.2.3