From f92898e7f32e3533bfd95be174044bc349d416ca Mon Sep 17 00:00:00 2001 From: Vasilis Liaskovitis Date: Mon, 15 Oct 2018 15:25:08 +0200 Subject: [PATCH 01/18] xen/blkfront: avoid NULL blkfront_info dereference on device removal MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If a block device is hot-added when we are out of grants, gnttab_grant_foreign_access fails with -ENOSPC (log message "28 granting access to ring page") in this code path: talk_to_blkback -> setup_blkring -> xenbus_grant_ring -> gnttab_grant_foreign_access and the failing path in talk_to_blkback sets the driver_data to NULL: destroy_blkring: blkif_free(info, 0); mutex_lock(&blkfront_mutex); free_info(info); mutex_unlock(&blkfront_mutex); dev_set_drvdata(&dev->dev, NULL); This results in a NULL pointer BUG when blkfront_remove and blkif_free try to access the failing device's NULL struct blkfront_info. Cc: stable@vger.kernel.org # 4.5 and later Signed-off-by: Vasilis Liaskovitis Reviewed-by: Roger Pau Monné Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Jens Axboe --- drivers/block/xen-blkfront.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 9eea83ae01c6..56452cabce5b 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -2493,6 +2493,9 @@ static int blkfront_remove(struct xenbus_device *xbdev) dev_dbg(&xbdev->dev, "%s removed", xbdev->nodename); + if (!info) + return 0; + blkif_free(info, 0); mutex_lock(&info->mutex); From d91dc172e34f6954a94957b012c3b08f4103d5f9 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Fri, 19 Oct 2018 20:44:17 +0200 Subject: [PATCH 02/18] skd: fix unchecked return values Check return values of dma_set_mask_and_coherent(). Otherwise, if dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); fails, the following piece of code will be executed even when the call to dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); returns 0: dev_err(&pdev->dev, "DMA mask error %d\n", rc); goto err_out_regions; Addresses-Coverity-ID: 1474553 ("Unchecked return value") Fixes: 138126214868 ("skd: switch to the generic DMA API") Reviewed-by: Christoph Hellwig Signed-off-by: Gustavo A. R. Silva Signed-off-by: Jens Axboe --- drivers/block/skd_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c index 7c5fc6942f32..2459dcc04b1c 100644 --- a/drivers/block/skd_main.c +++ b/drivers/block/skd_main.c @@ -3175,7 +3175,7 @@ static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out; rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (rc) - dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (rc) { dev_err(&pdev->dev, "DMA mask error %d\n", rc); goto err_out_regions; @@ -3364,7 +3364,7 @@ static int skd_pci_resume(struct pci_dev *pdev) goto err_out; rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (rc) - dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (rc) { dev_err(&pdev->dev, "DMA mask error %d\n", rc); goto err_out_regions; From cdffab7a86b05b207907c391c093023daed5d4a4 Mon Sep 17 00:00:00 2001 From: zhong jiang Date: Tue, 23 Oct 2018 20:06:37 +0800 Subject: [PATCH 03/18] cdrom: remove set but not used variable 'tocuse' tocuse is not used after setting its value. It is safe to remove the unused variable. Signed-off-by: zhong jiang Signed-off-by: Jens Axboe --- drivers/cdrom/gdrom.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c index 757e85b81879..b45c543c571a 100644 --- a/drivers/cdrom/gdrom.c +++ b/drivers/cdrom/gdrom.c @@ -327,15 +327,15 @@ static int get_entry_track(int track) static int gdrom_get_last_session(struct cdrom_device_info *cd_info, struct cdrom_multisession *ms_info) { - int fentry, lentry, track, data, tocuse, err; + int fentry, lentry, track, data, err; + if (!gd.toc) return -ENOMEM; - tocuse = 1; + /* Check if GD-ROM */ err = gdrom_readtoc_cmd(gd.toc, 1); /* Not a GD-ROM so check if standard CD-ROM */ if (err) { - tocuse = 0; err = gdrom_readtoc_cmd(gd.toc, 0); if (err) { pr_info("Could not get CD table of contents\n"); From 7f9d35d24c56576a8c18a8b6f74711c7f3c9c6c0 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:40 +0900 Subject: [PATCH 04/18] scsi: sd_zbc: Rearrange code Move the urswrz check out of sd_zbc_read_zones() and into sd_zbc_read_zoned_characteristics() where that value is obtained (read from the disk zoned characteristics VPD page). Since this function now does more than simply reading the VPD page, rename it to sd_zbc_check_zoned_characteristics(). Also fix the error message displayed when reading that VPD page fails. Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Acked-by: Martin K. Petersen Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- drivers/scsi/sd_zbc.c | 39 +++++++++++++++++++-------------------- 1 file changed, 19 insertions(+), 20 deletions(-) diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index 412c1787dcd9..0b7d8787f785 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -305,19 +305,19 @@ void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, } /** - * sd_zbc_read_zoned_characteristics - Read zoned block device characteristics + * sd_zbc_check_zoned_characteristics - Check zoned block device characteristics * @sdkp: Target disk * @buf: Buffer where to store the VPD page data * - * Read VPD page B6. + * Read VPD page B6, get information and check that reads are unconstrained. */ -static int sd_zbc_read_zoned_characteristics(struct scsi_disk *sdkp, - unsigned char *buf) +static int sd_zbc_check_zoned_characteristics(struct scsi_disk *sdkp, + unsigned char *buf) { if (scsi_get_vpd_page(sdkp->device, 0xb6, buf, 64)) { sd_printk(KERN_NOTICE, sdkp, - "Unconstrained-read check failed\n"); + "Read zoned characteristics VPD page failed\n"); return -ENODEV; } @@ -335,6 +335,18 @@ static int sd_zbc_read_zoned_characteristics(struct scsi_disk *sdkp, sdkp->zones_max_open = get_unaligned_be32(&buf[16]); } + /* + * Check for unconstrained reads: host-managed devices with + * constrained reads (drives failing read after write pointer) + * are not supported. + */ + if (!sdkp->urswrz) { + if (sdkp->first_scan) + sd_printk(KERN_NOTICE, sdkp, + "constrained reads devices are not supported\n"); + return -ENODEV; + } + return 0; } @@ -675,24 +687,11 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf) */ return 0; - /* Get zoned block device characteristics */ - ret = sd_zbc_read_zoned_characteristics(sdkp, buf); + /* Check zoned block device characteristics (unconstrained reads) */ + ret = sd_zbc_check_zoned_characteristics(sdkp, buf); if (ret) goto err; - /* - * Check for unconstrained reads: host-managed devices with - * constrained reads (drives failing read after write pointer) - * are not supported. - */ - if (!sdkp->urswrz) { - if (sdkp->first_scan) - sd_printk(KERN_NOTICE, sdkp, - "constrained reads devices are not supported\n"); - ret = -ENODEV; - goto err; - } - /* Check capacity */ ret = sd_zbc_check_capacity(sdkp, buf); if (ret) From d2e428e49eec9b7ff175d7d5941d50e5a7d15324 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:41 +0900 Subject: [PATCH 05/18] scsi: sd_zbc: Reduce boot device scan and revalidate time Handling checks of ZBC device capacity using the max_lba field of the REPORT ZONES command reply for disks with rc_basis == 0 can be done using the same report zones command reply used to check the "same" field. Avoid executing a report zones command solely to check the disk capacity by merging sd_zbc_check_capacity() into sd_zbc_check_zone_size() and renaming that function to sd_zbc_check_zones(). This removes a costly execution of a full report zones command and so reduces device scan duration at boot time as well as the duration of disk revalidate calls. Furthermore, setting the partial report bit in the REPORT ZONES command cdb can significantly reduce this command execution time as the device does not have to count and report the total number of zones that could be reported assuming a large enough reply buffer. A non-partial zone report is necessary only for the first execution of report zones used to check the same field value (to ensure that this value applies to all zones of the disk). All other calls to sd_zbc_report_zones() can use a partial report to reduce execution time. Using a 14 TB ZBC disk, these simple changes reduce device scan time at boot from about 3.5s down to about 900ms. Disk revalidate times are also reduced from about 450ms down to 230ms. Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Acked-by: Martin K. Petersen Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- drivers/scsi/sd_zbc.c | 94 ++++++++++++++++++------------------------- 1 file changed, 40 insertions(+), 54 deletions(-) diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index 0b7d8787f785..ca73c46931c0 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -67,11 +67,17 @@ static void sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf, * @buf: Buffer to use for the reply * @buflen: the buffer size * @lba: Start LBA of the report + * @partial: Do partial report * * For internal use during device validation. + * Using partial=true can significantly speed up execution of a report zones + * command because the disk does not have to count all possible report matching + * zones and will only report the count of zones fitting in the command reply + * buffer. */ static int sd_zbc_report_zones(struct scsi_disk *sdkp, unsigned char *buf, - unsigned int buflen, sector_t lba) + unsigned int buflen, sector_t lba, + bool partial) { struct scsi_device *sdp = sdkp->device; const int timeout = sdp->request_queue->rq_timeout; @@ -85,6 +91,8 @@ static int sd_zbc_report_zones(struct scsi_disk *sdkp, unsigned char *buf, cmd[1] = ZI_REPORT_ZONES; put_unaligned_be64(lba, &cmd[2]); put_unaligned_be32(buflen, &cmd[10]); + if (partial) + cmd[14] = ZBC_REPORT_ZONE_PARTIAL; memset(buf, 0, buflen); result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, @@ -350,60 +358,25 @@ static int sd_zbc_check_zoned_characteristics(struct scsi_disk *sdkp, return 0; } -/** - * sd_zbc_check_capacity - Check reported capacity. - * @sdkp: Target disk - * @buf: Buffer to use for commands - * - * ZBC drive may report only the capacity of the first conventional zones at - * LBA 0. This is indicated by the RC_BASIS field of the read capacity reply. - * Check this here. If the disk reported only its conventional zones capacity, - * get the total capacity by doing a report zones. - */ -static int sd_zbc_check_capacity(struct scsi_disk *sdkp, unsigned char *buf) -{ - sector_t lba; - int ret; - - if (sdkp->rc_basis != 0) - return 0; - - /* Do a report zone to get the maximum LBA to check capacity */ - ret = sd_zbc_report_zones(sdkp, buf, SD_BUF_SIZE, 0); - if (ret) - return ret; - - /* The max_lba field is the capacity of this device */ - lba = get_unaligned_be64(&buf[8]); - if (lba + 1 == sdkp->capacity) - return 0; - - if (sdkp->first_scan) - sd_printk(KERN_WARNING, sdkp, - "Changing capacity from %llu to max LBA+1 %llu\n", - (unsigned long long)sdkp->capacity, - (unsigned long long)lba + 1); - sdkp->capacity = lba + 1; - - return 0; -} - #define SD_ZBC_BUF_SIZE 131072U /** - * sd_zbc_check_zone_size - Check the device zone sizes + * sd_zbc_check_zones - Check the device capacity and zone sizes * @sdkp: Target disk * - * Check that all zones of the device are equal. The last zone can however - * be smaller. The zone size must also be a power of two number of LBAs. + * Check that the device capacity as reported by READ CAPACITY matches the + * max_lba value (plus one)of the report zones command reply. Also check that + * all zones of the device have an equal size, only allowing the last zone of + * the disk to have a smaller size (runt zone). The zone size must also be a + * power of two. * * Returns the zone size in number of blocks upon success or an error code * upon failure. */ -static s64 sd_zbc_check_zone_size(struct scsi_disk *sdkp) +static s64 sd_zbc_check_zones(struct scsi_disk *sdkp) { u64 zone_blocks = 0; - sector_t block = 0; + sector_t max_lba, block = 0; unsigned char *buf; unsigned char *rec; unsigned int buf_len; @@ -416,11 +389,28 @@ static s64 sd_zbc_check_zone_size(struct scsi_disk *sdkp) if (!buf) return -ENOMEM; - /* Do a report zone to get the same field */ - ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, 0); + /* Do a report zone to get max_lba and the same field */ + ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, 0, false); if (ret) goto out_free; + if (sdkp->rc_basis == 0) { + /* The max_lba field is the capacity of this device */ + max_lba = get_unaligned_be64(&buf[8]); + if (sdkp->capacity != max_lba + 1) { + if (sdkp->first_scan) + sd_printk(KERN_WARNING, sdkp, + "Changing capacity from %llu to max LBA+1 %llu\n", + (unsigned long long)sdkp->capacity, + (unsigned long long)max_lba + 1); + sdkp->capacity = max_lba + 1; + } + } + + /* + * Check same field: for any value other than 0, we know that all zones + * have the same size. + */ same = buf[4] & 0x0f; if (same > 0) { rec = &buf[64]; @@ -458,7 +448,7 @@ static s64 sd_zbc_check_zone_size(struct scsi_disk *sdkp) if (block < sdkp->capacity) { ret = sd_zbc_report_zones(sdkp, buf, - SD_ZBC_BUF_SIZE, block); + SD_ZBC_BUF_SIZE, block, true); if (ret) goto out_free; } @@ -574,7 +564,8 @@ sd_zbc_setup_seq_zones_bitmap(struct scsi_disk *sdkp, u32 zone_shift, goto out; while (lba < sdkp->capacity) { - ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, lba); + ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, + lba, true); if (ret) goto out; lba = sd_zbc_get_seq_zones(sdkp, buf, SD_ZBC_BUF_SIZE, @@ -692,16 +683,11 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf) if (ret) goto err; - /* Check capacity */ - ret = sd_zbc_check_capacity(sdkp, buf); - if (ret) - goto err; - /* * Check zone size: only devices with a constant zone size (except * an eventual last runt zone) that is a power of 2 are supported. */ - zone_blocks = sd_zbc_check_zone_size(sdkp); + zone_blocks = sd_zbc_check_zones(sdkp); ret = -EFBIG; if (zone_blocks != (u32)zone_blocks) goto err; From 5f832a395859de7191e638e3777ae57f37d46d08 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:42 +0900 Subject: [PATCH 06/18] scsi: sd_zbc: Fix sd_zbc_check_zones() error checks The unsigned 32 bits overflow check for the zone size value is already done within sd_zbc_check_zones() with the test: } else if (logical_to_sectors(sdkp->device, zone_blocks) > UINT_MAX) { so there is no need to check again for an out of range value in sd_zbc_read_zones(). Simplify the code and fix sd_zbc_check_zones() error return to -EFBIG instead of -ENODEV if the zone size is too large. Change the return type of sd_zbc_check_zones() to an int for the error code and return the zone size (zone_blocks) through a u32 pointer to avoid overflowing the signed 32 return value. Reviewed-by: Hannes Reinecke Acked-by: Martin K. Petersen Reviewed-by: Christoph Hellwig Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- drivers/scsi/sd_zbc.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index ca73c46931c0..0678e1e108b0 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -373,7 +373,7 @@ static int sd_zbc_check_zoned_characteristics(struct scsi_disk *sdkp, * Returns the zone size in number of blocks upon success or an error code * upon failure. */ -static s64 sd_zbc_check_zones(struct scsi_disk *sdkp) +static int sd_zbc_check_zones(struct scsi_disk *sdkp, u32 *zblocks) { u64 zone_blocks = 0; sector_t max_lba, block = 0; @@ -381,7 +381,7 @@ static s64 sd_zbc_check_zones(struct scsi_disk *sdkp) unsigned char *rec; unsigned int buf_len; unsigned int list_length; - s64 ret; + int ret; u8 same; /* Get a buffer */ @@ -472,9 +472,10 @@ out: if (sdkp->first_scan) sd_printk(KERN_NOTICE, sdkp, "Zone size too large\n"); - ret = -ENODEV; + ret = -EFBIG; } else { - ret = zone_blocks; + *zblocks = zone_blocks; + ret = 0; } out_free: @@ -668,7 +669,7 @@ err: int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf) { - int64_t zone_blocks; + u32 zone_blocks; int ret; if (!sd_is_zoned(sdkp)) @@ -687,12 +688,8 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf) * Check zone size: only devices with a constant zone size (except * an eventual last runt zone) that is a power of 2 are supported. */ - zone_blocks = sd_zbc_check_zones(sdkp); - ret = -EFBIG; - if (zone_blocks != (u32)zone_blocks) - goto err; - ret = zone_blocks; - if (ret < 0) + ret = sd_zbc_check_zones(sdkp, &zone_blocks); + if (ret != 0) goto err; /* The drive satisfies the kernel restrictions: set it up */ From a91e138022bc29b5d2bbc56b41de3e0db6261e28 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:43 +0900 Subject: [PATCH 07/18] block: Introduce blkdev_nr_zones() helper Introduce the blkdev_nr_zones() helper function to get the total number of zones of a zoned block device. This number is always 0 for a regular block device (q->limits.zoned == BLK_ZONED_NONE case). Replace hard-coded number of zones calculation in dmz_get_zoned_device() with a call to this helper. Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- block/blk-zoned.c | 27 +++++++++++++++++++++++++++ drivers/md/dm-zoned-target.c | 3 +-- include/linux/blkdev.h | 5 +++++ 3 files changed, 33 insertions(+), 2 deletions(-) diff --git a/block/blk-zoned.c b/block/blk-zoned.c index c461cf63f1f4..32e377f755d8 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -63,6 +63,33 @@ void __blk_req_zone_write_unlock(struct request *rq) } EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock); +static inline unsigned int __blkdev_nr_zones(struct request_queue *q, + sector_t nr_sectors) +{ + unsigned long zone_sectors = blk_queue_zone_sectors(q); + + return (nr_sectors + zone_sectors - 1) >> ilog2(zone_sectors); +} + +/** + * blkdev_nr_zones - Get number of zones + * @bdev: Target block device + * + * Description: + * Return the total number of zones of a zoned block device. + * For a regular block device, the number of zones is always 0. + */ +unsigned int blkdev_nr_zones(struct block_device *bdev) +{ + struct request_queue *q = bdev_get_queue(bdev); + + if (!blk_queue_is_zoned(q)) + return 0; + + return __blkdev_nr_zones(q, bdev->bd_part->nr_sects); +} +EXPORT_SYMBOL_GPL(blkdev_nr_zones); + /* * Check that a zone report belongs to the partition. * If yes, fix its start sector and write pointer, copy it in the diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c index a44183ff4be0..12d96a263623 100644 --- a/drivers/md/dm-zoned-target.c +++ b/drivers/md/dm-zoned-target.c @@ -702,8 +702,7 @@ static int dmz_get_zoned_device(struct dm_target *ti, char *path) dev->zone_nr_blocks = dmz_sect2blk(dev->zone_nr_sectors); dev->zone_nr_blocks_shift = ilog2(dev->zone_nr_blocks); - dev->nr_zones = (dev->capacity + dev->zone_nr_sectors - 1) - >> dev->zone_nr_sectors_shift; + dev->nr_zones = blkdev_nr_zones(dev->bdev); dmz->dev = dev; diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 7d423721b327..ca5fdc1b7745 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -401,6 +401,7 @@ struct blk_zone_report_hdr { u8 padding[60]; }; +extern unsigned int blkdev_nr_zones(struct block_device *bdev); extern int blkdev_report_zones(struct block_device *bdev, sector_t sector, struct blk_zone *zones, unsigned int *nr_zones, gfp_t gfp_mask); @@ -414,6 +415,10 @@ extern int blkdev_reset_zones_ioctl(struct block_device *bdev, fmode_t mode, #else /* CONFIG_BLK_DEV_ZONED */ +static inline unsigned int blkdev_nr_zones(struct block_device *bdev) +{ + return 0; +} static inline int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) From 2e85fbaff3a71e46038ec736186c42ffa721c775 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:44 +0900 Subject: [PATCH 08/18] block: Limit allocation of zone descriptors for report zones There is no point in allocating more zone descriptors than the number of zones a block device has for doing a zone report. Avoid doing that in blkdev_report_zones_ioctl() by limiting the number of zone decriptors allocated internally to process the user request. Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- block/blk-zoned.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 32e377f755d8..bb4ed69f917f 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -355,8 +355,7 @@ int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, if (!rep.nr_zones) return -EINVAL; - if (rep.nr_zones > INT_MAX / sizeof(struct blk_zone)) - return -ERANGE; + rep.nr_zones = min(blkdev_nr_zones(bdev), rep.nr_zones); zones = kvmalloc_array(rep.nr_zones, sizeof(struct blk_zone), GFP_KERNEL | __GFP_ZERO); From 72cd87576d1d885fc2968416ed5aca8f54749653 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:45 +0900 Subject: [PATCH 09/18] block: Introduce BLKGETZONESZ ioctl Get a zoned block device zone size in number of 512 B sectors. The zone size is always 0 for regular block devices. Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- block/ioctl.c | 2 ++ include/uapi/linux/blkzoned.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/block/ioctl.c b/block/ioctl.c index 3884d810efd2..f6d2c6f1f050 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -532,6 +532,8 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, return blkdev_report_zones_ioctl(bdev, mode, cmd, arg); case BLKRESETZONE: return blkdev_reset_zones_ioctl(bdev, mode, cmd, arg); + case BLKGETZONESZ: + return put_uint(arg, bdev_zone_sectors(bdev)); case HDIO_GETGEO: return blkdev_getgeo(bdev, argp); case BLKRAGET: diff --git a/include/uapi/linux/blkzoned.h b/include/uapi/linux/blkzoned.h index ff5a5db8906a..281ac605f752 100644 --- a/include/uapi/linux/blkzoned.h +++ b/include/uapi/linux/blkzoned.h @@ -137,8 +137,10 @@ struct blk_zone_range { * sector specified in the report request structure. * @BLKRESETZONE: Reset the write pointer of the zones in the specified * sector range. The sector range must be zone aligned. + * @BLKGETZONESZ: Get the device zone size in number of 512 B sectors. */ #define BLKREPORTZONE _IOWR(0x12, 130, struct blk_zone_report) #define BLKRESETZONE _IOW(0x12, 131, struct blk_zone_range) +#define BLKGETZONESZ _IOW(0x12, 132, __u32) #endif /* _UAPI_BLKZONED_H */ From 65e4e3eee83d7a4ad7e8c5175b2a0ddfd3b5685f Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:46 +0900 Subject: [PATCH 10/18] block: Introduce BLKGETNRZONES ioctl Get a zoned block device total number of zones. The device can be a partition of the whole device. The number of zones is always 0 for regular block devices. Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- block/ioctl.c | 2 ++ include/uapi/linux/blkzoned.h | 1 + 2 files changed, 3 insertions(+) diff --git a/block/ioctl.c b/block/ioctl.c index f6d2c6f1f050..4825c78a6baa 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -534,6 +534,8 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, return blkdev_reset_zones_ioctl(bdev, mode, cmd, arg); case BLKGETZONESZ: return put_uint(arg, bdev_zone_sectors(bdev)); + case BLKGETNRZONES: + return put_uint(arg, blkdev_nr_zones(bdev)); case HDIO_GETGEO: return blkdev_getgeo(bdev, argp); case BLKRAGET: diff --git a/include/uapi/linux/blkzoned.h b/include/uapi/linux/blkzoned.h index 281ac605f752..8f08ff9bdea0 100644 --- a/include/uapi/linux/blkzoned.h +++ b/include/uapi/linux/blkzoned.h @@ -142,5 +142,6 @@ struct blk_zone_range { #define BLKREPORTZONE _IOWR(0x12, 130, struct blk_zone_report) #define BLKRESETZONE _IOW(0x12, 131, struct blk_zone_range) #define BLKGETZONESZ _IOW(0x12, 132, __u32) +#define BLKGETNRZONES _IOW(0x12, 133, __u32) #endif /* _UAPI_BLKZONED_H */ From a2d6b3a2d39005ab4d4a83481a7db092ebf0e9d6 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:47 +0900 Subject: [PATCH 11/18] block: Improve zone reset execution There is no need to synchronously execute all REQ_OP_ZONE_RESET BIOs necessary to reset a range of zones. Similarly to what is done for discard BIOs in blk-lib.c, all zone reset BIOs can be chained and executed asynchronously and a synchronous call done only for the last BIO of the chain. Modify blkdev_reset_zones() to operate similarly to blkdev_issue_discard() using the next_bio() helper for chaining BIOs. To avoid code duplication of that function in blk_zoned.c, rename next_bio() into blk_next_bio() and declare it as a block internal function in blk.h. Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- block/blk-lib.c | 13 ++++++------- block/blk-zoned.c | 29 ++++++++++++++++------------- block/blk.h | 2 ++ 3 files changed, 24 insertions(+), 20 deletions(-) diff --git a/block/blk-lib.c b/block/blk-lib.c index bbd44666f2b5..76f867ea9a9b 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -10,8 +10,7 @@ #include "blk.h" -static struct bio *next_bio(struct bio *bio, unsigned int nr_pages, - gfp_t gfp) +struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp) { struct bio *new = bio_alloc(gfp, nr_pages); @@ -63,7 +62,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, end_sect = sector + req_sects; - bio = next_bio(bio, 0, gfp_mask); + bio = blk_next_bio(bio, 0, gfp_mask); bio->bi_iter.bi_sector = sector; bio_set_dev(bio, bdev); bio_set_op_attrs(bio, op, 0); @@ -165,7 +164,7 @@ static int __blkdev_issue_write_same(struct block_device *bdev, sector_t sector, max_write_same_sectors = UINT_MAX >> 9; while (nr_sects) { - bio = next_bio(bio, 1, gfp_mask); + bio = blk_next_bio(bio, 1, gfp_mask); bio->bi_iter.bi_sector = sector; bio_set_dev(bio, bdev); bio->bi_vcnt = 1; @@ -241,7 +240,7 @@ static int __blkdev_issue_write_zeroes(struct block_device *bdev, return -EOPNOTSUPP; while (nr_sects) { - bio = next_bio(bio, 0, gfp_mask); + bio = blk_next_bio(bio, 0, gfp_mask); bio->bi_iter.bi_sector = sector; bio_set_dev(bio, bdev); bio->bi_opf = REQ_OP_WRITE_ZEROES; @@ -292,8 +291,8 @@ static int __blkdev_issue_zero_pages(struct block_device *bdev, return -EPERM; while (nr_sects != 0) { - bio = next_bio(bio, __blkdev_sectors_to_bio_pages(nr_sects), - gfp_mask); + bio = blk_next_bio(bio, __blkdev_sectors_to_bio_pages(nr_sects), + gfp_mask); bio->bi_iter.bi_sector = sector; bio_set_dev(bio, bdev); bio_set_op_attrs(bio, REQ_OP_WRITE, 0); diff --git a/block/blk-zoned.c b/block/blk-zoned.c index bb4ed69f917f..5d967fd39fbd 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -13,6 +13,8 @@ #include #include +#include "blk.h" + static inline sector_t blk_zone_start(struct request_queue *q, sector_t sector) { @@ -277,16 +279,17 @@ int blkdev_reset_zones(struct block_device *bdev, struct request_queue *q = bdev_get_queue(bdev); sector_t zone_sectors; sector_t end_sector = sector + nr_sectors; - struct bio *bio; + struct bio *bio = NULL; + struct blk_plug plug; int ret; - if (!q) - return -ENXIO; - if (!blk_queue_is_zoned(q)) return -EOPNOTSUPP; - if (end_sector > bdev->bd_part->nr_sects) + if (bdev_read_only(bdev)) + return -EPERM; + + if (!nr_sectors || end_sector > bdev->bd_part->nr_sects) /* Out of range */ return -EINVAL; @@ -299,19 +302,14 @@ int blkdev_reset_zones(struct block_device *bdev, end_sector != bdev->bd_part->nr_sects) return -EINVAL; + blk_start_plug(&plug); while (sector < end_sector) { - bio = bio_alloc(gfp_mask, 0); + bio = blk_next_bio(bio, 0, gfp_mask); bio->bi_iter.bi_sector = sector; bio_set_dev(bio, bdev); bio_set_op_attrs(bio, REQ_OP_ZONE_RESET, 0); - ret = submit_bio_wait(bio); - bio_put(bio); - - if (ret) - return ret; - sector += zone_sectors; /* This may take a while, so be nice to others */ @@ -319,7 +317,12 @@ int blkdev_reset_zones(struct block_device *bdev, } - return 0; + ret = submit_bio_wait(bio); + bio_put(bio); + + blk_finish_plug(&plug); + + return ret; } EXPORT_SYMBOL_GPL(blkdev_reset_zones); diff --git a/block/blk.h b/block/blk.h index 3d2aecba96a4..93574baaa6b8 100644 --- a/block/blk.h +++ b/block/blk.h @@ -488,4 +488,6 @@ extern int blk_iolatency_init(struct request_queue *q); static inline int blk_iolatency_init(struct request_queue *q) { return 0; } #endif +struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp); + #endif /* BLK_INTERNAL_H */ From 965b652e901886ea54f93c60027b5be76328d958 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:48 +0900 Subject: [PATCH 12/18] block: Expose queue nr_zones in sysfs Expose through sysfs the nr_zones field of struct request_queue. Exposing this value helps in debugging disk issues as well as facilitating scripts based use of the disk (e.g. blktests). For zoned block devices, the nr_zones field indicates the total number of zones of the device calculated using the known disk capacity and zone size. This number of zones is always 0 for regular block devices. Since nr_zones is defined conditionally with CONFIG_BLK_DEV_ZONED, introduce the blk_queue_nr_zones() function to return the correct value for any device, regardless if CONFIG_BLK_DEV_ZONED is set. Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- block/blk-sysfs.c | 11 +++++++++++ include/linux/blkdev.h | 10 ++++++++++ 2 files changed, 21 insertions(+) diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 3772671cf2bc..92be8092ca4f 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -300,6 +300,11 @@ static ssize_t queue_zoned_show(struct request_queue *q, char *page) } } +static ssize_t queue_nr_zones_show(struct request_queue *q, char *page) +{ + return queue_var_show(blk_queue_nr_zones(q), page); +} + static ssize_t queue_nomerges_show(struct request_queue *q, char *page) { return queue_var_show((blk_queue_nomerges(q) << 1) | @@ -637,6 +642,11 @@ static struct queue_sysfs_entry queue_zoned_entry = { .show = queue_zoned_show, }; +static struct queue_sysfs_entry queue_nr_zones_entry = { + .attr = {.name = "nr_zones", .mode = 0444 }, + .show = queue_nr_zones_show, +}; + static struct queue_sysfs_entry queue_nomerges_entry = { .attr = {.name = "nomerges", .mode = 0644 }, .show = queue_nomerges_show, @@ -727,6 +737,7 @@ static struct attribute *default_attrs[] = { &queue_write_zeroes_max_entry.attr, &queue_nonrot_entry.attr, &queue_zoned_entry.attr, + &queue_nr_zones_entry.attr, &queue_nomerges_entry.attr, &queue_rq_affinity_entry.attr, &queue_iostats_entry.attr, diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index ca5fdc1b7745..6bb845f9601a 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -811,6 +811,11 @@ static inline unsigned int blk_queue_zone_sectors(struct request_queue *q) } #ifdef CONFIG_BLK_DEV_ZONED +static inline unsigned int blk_queue_nr_zones(struct request_queue *q) +{ + return blk_queue_is_zoned(q) ? q->nr_zones : 0; +} + static inline unsigned int blk_queue_zone_no(struct request_queue *q, sector_t sector) { @@ -826,6 +831,11 @@ static inline bool blk_queue_zone_is_seq(struct request_queue *q, return false; return test_bit(blk_queue_zone_no(q, sector), q->seq_zones_bitmap); } +#else /* CONFIG_BLK_DEV_ZONED */ +static inline unsigned int blk_queue_nr_zones(struct request_queue *q) +{ + return 0; +} #endif /* CONFIG_BLK_DEV_ZONED */ static inline bool rq_is_sync(struct request *rq) From e76239a3748c90a8b0e197f8f4544a8ce52f126e Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 12 Oct 2018 19:08:49 +0900 Subject: [PATCH 13/18] block: add a report_zones method Dispatching a report zones command through the request queue is a major pain due to the command reply payload rewriting necessary. Given that blkdev_report_zones() is executing everything synchronously, implement report zones as a block device file operation instead, allowing major simplification of the code in many places. sd, null-blk, dm-linear and dm-flakey being the only block device drivers supporting exposing zoned block devices, these drivers are modified to provide the device side implementation of the report_zones() block device file operation. For device mappers, a new report_zones() target type operation is defined so that the upper block layer calls blkdev_report_zones() can be propagated down to the underlying devices of the dm targets. Implementation for this new operation is added to the dm-linear and dm-flakey targets. Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig [Damien] * Changed method block_device argument to gendisk * Various bug fixes and improvements * Added support for null_blk, dm-linear and dm-flakey. Reviewed-by: Martin K. Petersen Reviewed-by: Mike Snitzer Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- block/blk-core.c | 1 - block/blk-mq-debugfs.c | 1 - block/blk-zoned.c | 164 ++++++++++---------------------- drivers/block/null_blk.h | 11 ++- drivers/block/null_blk_main.c | 23 +---- drivers/block/null_blk_zoned.c | 61 ++++-------- drivers/md/dm-flakey.c | 30 ++++-- drivers/md/dm-linear.c | 35 ++++--- drivers/md/dm.c | 169 ++++++++++++++++----------------- drivers/scsi/sd.c | 13 +-- drivers/scsi/sd.h | 11 +-- drivers/scsi/sd_zbc.c | 157 ++++++++++-------------------- include/linux/blk_types.h | 2 - include/linux/blkdev.h | 8 +- include/linux/device-mapper.h | 12 ++- include/trace/events/f2fs.h | 1 - 16 files changed, 270 insertions(+), 429 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 3ed60723e242..bc6ea87d10e0 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -2300,7 +2300,6 @@ generic_make_request_checks(struct bio *bio) if (!q->limits.max_write_same_sectors) goto not_supported; break; - case REQ_OP_ZONE_REPORT: case REQ_OP_ZONE_RESET: if (!blk_queue_is_zoned(q)) goto not_supported; diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index 41b86f50d126..10b284a1f18d 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -283,7 +283,6 @@ static const char *const op_name[] = { REQ_OP_NAME(WRITE), REQ_OP_NAME(FLUSH), REQ_OP_NAME(DISCARD), - REQ_OP_NAME(ZONE_REPORT), REQ_OP_NAME(SECURE_ERASE), REQ_OP_NAME(ZONE_RESET), REQ_OP_NAME(WRITE_SAME), diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 5d967fd39fbd..90cf503091d5 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -93,13 +93,10 @@ unsigned int blkdev_nr_zones(struct block_device *bdev) EXPORT_SYMBOL_GPL(blkdev_nr_zones); /* - * Check that a zone report belongs to the partition. - * If yes, fix its start sector and write pointer, copy it in the - * zone information array and return true. Return false otherwise. + * Check that a zone report belongs to this partition, and if yes, fix its start + * sector and write pointer and return true. Return false otherwise. */ -static bool blkdev_report_zone(struct block_device *bdev, - struct blk_zone *rep, - struct blk_zone *zone) +static bool blkdev_report_zone(struct block_device *bdev, struct blk_zone *rep) { sector_t offset = get_start_sect(bdev); @@ -114,11 +111,36 @@ static bool blkdev_report_zone(struct block_device *bdev, rep->wp = rep->start + rep->len; else rep->wp -= offset; - memcpy(zone, rep, sizeof(struct blk_zone)); - return true; } +static int blk_report_zones(struct gendisk *disk, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask) +{ + struct request_queue *q = disk->queue; + unsigned int z = 0, n, nrz = *nr_zones; + sector_t capacity = get_capacity(disk); + int ret; + + while (z < nrz && sector < capacity) { + n = nrz - z; + ret = disk->fops->report_zones(disk, sector, &zones[z], &n, + gfp_mask); + if (ret) + return ret; + if (!n) + break; + sector += blk_queue_zone_sectors(q) * n; + z += n; + } + + WARN_ON(z > *nr_zones); + *nr_zones = z; + + return 0; +} + /** * blkdev_report_zones - Get zones information * @bdev: Target block device @@ -133,130 +155,46 @@ static bool blkdev_report_zone(struct block_device *bdev, * requested by @nr_zones. The number of zones actually reported is * returned in @nr_zones. */ -int blkdev_report_zones(struct block_device *bdev, - sector_t sector, - struct blk_zone *zones, - unsigned int *nr_zones, +int blkdev_report_zones(struct block_device *bdev, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, gfp_t gfp_mask) { struct request_queue *q = bdev_get_queue(bdev); - struct blk_zone_report_hdr *hdr; - unsigned int nrz = *nr_zones; - struct page *page; - unsigned int nr_rep; - size_t rep_bytes; - unsigned int nr_pages; - struct bio *bio; - struct bio_vec *bv; - unsigned int i, n, nz; - unsigned int ofst; - void *addr; + unsigned int i, nrz; int ret; - if (!q) - return -ENXIO; - if (!blk_queue_is_zoned(q)) return -EOPNOTSUPP; - if (!nrz) - return 0; + /* + * A block device that advertized itself as zoned must have a + * report_zones method. If it does not have one defined, the device + * driver has a bug. So warn about that. + */ + if (WARN_ON_ONCE(!bdev->bd_disk->fops->report_zones)) + return -EOPNOTSUPP; - if (sector > bdev->bd_part->nr_sects) { + if (!*nr_zones || sector >= bdev->bd_part->nr_sects) { *nr_zones = 0; return 0; } - /* - * The zone report has a header. So make room for it in the - * payload. Also make sure that the report fits in a single BIO - * that will not be split down the stack. - */ - rep_bytes = sizeof(struct blk_zone_report_hdr) + - sizeof(struct blk_zone) * nrz; - rep_bytes = (rep_bytes + PAGE_SIZE - 1) & PAGE_MASK; - if (rep_bytes > (queue_max_sectors(q) << 9)) - rep_bytes = queue_max_sectors(q) << 9; - - nr_pages = min_t(unsigned int, BIO_MAX_PAGES, - rep_bytes >> PAGE_SHIFT); - nr_pages = min_t(unsigned int, nr_pages, - queue_max_segments(q)); - - bio = bio_alloc(gfp_mask, nr_pages); - if (!bio) - return -ENOMEM; - - bio_set_dev(bio, bdev); - bio->bi_iter.bi_sector = blk_zone_start(q, sector); - bio_set_op_attrs(bio, REQ_OP_ZONE_REPORT, 0); - - for (i = 0; i < nr_pages; i++) { - page = alloc_page(gfp_mask); - if (!page) { - ret = -ENOMEM; - goto out; - } - if (!bio_add_page(bio, page, PAGE_SIZE, 0)) { - __free_page(page); - break; - } - } - - if (i == 0) - ret = -ENOMEM; - else - ret = submit_bio_wait(bio); + nrz = min(*nr_zones, + __blkdev_nr_zones(q, bdev->bd_part->nr_sects - sector)); + ret = blk_report_zones(bdev->bd_disk, get_start_sect(bdev) + sector, + zones, &nrz, gfp_mask); if (ret) - goto out; + return ret; - /* - * Process the report result: skip the header and go through the - * reported zones to fixup and fixup the zone information for - * partitions. At the same time, return the zone information into - * the zone array. - */ - n = 0; - nz = 0; - nr_rep = 0; - bio_for_each_segment_all(bv, bio, i) { - - if (!bv->bv_page) + for (i = 0; i < nrz; i++) { + if (!blkdev_report_zone(bdev, zones)) break; - - addr = kmap_atomic(bv->bv_page); - - /* Get header in the first page */ - ofst = 0; - if (!nr_rep) { - hdr = addr; - nr_rep = hdr->nr_zones; - ofst = sizeof(struct blk_zone_report_hdr); - } - - /* Fixup and report zones */ - while (ofst < bv->bv_len && - n < nr_rep && nz < nrz) { - if (blkdev_report_zone(bdev, addr + ofst, &zones[nz])) - nz++; - ofst += sizeof(struct blk_zone); - n++; - } - - kunmap_atomic(addr); - - if (n >= nr_rep || nz >= nrz) - break; - + zones++; } - *nr_zones = nz; -out: - bio_for_each_segment_all(bv, bio, i) - __free_page(bv->bv_page); - bio_put(bio); + *nr_zones = i; - return ret; + return 0; } EXPORT_SYMBOL_GPL(blkdev_report_zones); diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h index 34e0030f0592..7685df43f1ef 100644 --- a/drivers/block/null_blk.h +++ b/drivers/block/null_blk.h @@ -87,7 +87,9 @@ struct nullb { #ifdef CONFIG_BLK_DEV_ZONED int null_zone_init(struct nullb_device *dev); void null_zone_exit(struct nullb_device *dev); -blk_status_t null_zone_report(struct nullb *nullb, struct bio *bio); +int null_zone_report(struct gendisk *disk, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask); void null_zone_write(struct nullb_cmd *cmd, sector_t sector, unsigned int nr_sectors); void null_zone_reset(struct nullb_cmd *cmd, sector_t sector); @@ -97,10 +99,11 @@ static inline int null_zone_init(struct nullb_device *dev) return -EINVAL; } static inline void null_zone_exit(struct nullb_device *dev) {} -static inline blk_status_t null_zone_report(struct nullb *nullb, - struct bio *bio) +static inline int null_zone_report(struct gendisk *disk, sector_t sector, + struct blk_zone *zones, + unsigned int *nr_zones, gfp_t gfp_mask) { - return BLK_STS_NOTSUPP; + return -EOPNOTSUPP; } static inline void null_zone_write(struct nullb_cmd *cmd, sector_t sector, unsigned int nr_sectors) diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index e94591021682..5ba426dbf377 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -1129,34 +1129,12 @@ static void null_restart_queue_async(struct nullb *nullb) blk_mq_start_stopped_hw_queues(q, true); } -static bool cmd_report_zone(struct nullb *nullb, struct nullb_cmd *cmd) -{ - struct nullb_device *dev = cmd->nq->dev; - - if (dev->queue_mode == NULL_Q_BIO) { - if (bio_op(cmd->bio) == REQ_OP_ZONE_REPORT) { - cmd->error = null_zone_report(nullb, cmd->bio); - return true; - } - } else { - if (req_op(cmd->rq) == REQ_OP_ZONE_REPORT) { - cmd->error = null_zone_report(nullb, cmd->rq->bio); - return true; - } - } - - return false; -} - static blk_status_t null_handle_cmd(struct nullb_cmd *cmd) { struct nullb_device *dev = cmd->nq->dev; struct nullb *nullb = dev->nullb; int err = 0; - if (cmd_report_zone(nullb, cmd)) - goto out; - if (test_bit(NULLB_DEV_FL_THROTTLED, &dev->flags)) { struct request *rq = cmd->rq; @@ -1443,6 +1421,7 @@ static const struct block_device_operations null_fops = { .owner = THIS_MODULE, .open = null_open, .release = null_release, + .report_zones = null_zone_report, }; static void null_init_queue(struct nullb *nullb, struct nullb_queue *nq) diff --git a/drivers/block/null_blk_zoned.c b/drivers/block/null_blk_zoned.c index 7c6b86d98700..c0b0e4a3fa8f 100644 --- a/drivers/block/null_blk_zoned.c +++ b/drivers/block/null_blk_zoned.c @@ -48,54 +48,27 @@ void null_zone_exit(struct nullb_device *dev) kvfree(dev->zones); } -static void null_zone_fill_bio(struct nullb_device *dev, struct bio *bio, - unsigned int zno, unsigned int nr_zones) -{ - struct blk_zone_report_hdr *hdr = NULL; - struct bio_vec bvec; - struct bvec_iter iter; - void *addr; - unsigned int zones_to_cpy; - - bio_for_each_segment(bvec, bio, iter) { - addr = kmap_atomic(bvec.bv_page); - - zones_to_cpy = bvec.bv_len / sizeof(struct blk_zone); - - if (!hdr) { - hdr = (struct blk_zone_report_hdr *)addr; - hdr->nr_zones = nr_zones; - zones_to_cpy--; - addr += sizeof(struct blk_zone_report_hdr); - } - - zones_to_cpy = min_t(unsigned int, zones_to_cpy, nr_zones); - - memcpy(addr, &dev->zones[zno], - zones_to_cpy * sizeof(struct blk_zone)); - - kunmap_atomic(addr); - - nr_zones -= zones_to_cpy; - zno += zones_to_cpy; - - if (!nr_zones) - break; - } -} - -blk_status_t null_zone_report(struct nullb *nullb, struct bio *bio) +int null_zone_report(struct gendisk *disk, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask) { + struct nullb *nullb = disk->private_data; struct nullb_device *dev = nullb->dev; - unsigned int zno = null_zone_no(dev, bio->bi_iter.bi_sector); - unsigned int nr_zones = dev->nr_zones - zno; - unsigned int max_zones; + unsigned int zno, nrz = 0; - max_zones = (bio->bi_iter.bi_size / sizeof(struct blk_zone)) - 1; - nr_zones = min_t(unsigned int, nr_zones, max_zones); - null_zone_fill_bio(nullb->dev, bio, zno, nr_zones); + if (!dev->zoned) + /* Not a zoned null device */ + return -EOPNOTSUPP; - return BLK_STS_OK; + zno = null_zone_no(dev, sector); + if (zno < dev->nr_zones) { + nrz = min_t(unsigned int, *nr_zones, dev->nr_zones - zno); + memcpy(zones, &dev->zones[zno], nrz * sizeof(struct blk_zone)); + } + + *nr_zones = nrz; + + return 0; } void null_zone_write(struct nullb_cmd *cmd, sector_t sector, diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c index 32aabe27b37c..3cb97fa4c11d 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -315,10 +315,6 @@ static int flakey_map(struct dm_target *ti, struct bio *bio) if (bio_op(bio) == REQ_OP_ZONE_RESET) goto map_bio; - /* We need to remap reported zones, so remember the BIO iter */ - if (bio_op(bio) == REQ_OP_ZONE_REPORT) - goto map_bio; - /* Are we alive ? */ elapsed = (jiffies - fc->start_time) / HZ; if (elapsed % (fc->up_interval + fc->down_interval) >= fc->up_interval) { @@ -380,11 +376,6 @@ static int flakey_end_io(struct dm_target *ti, struct bio *bio, if (bio_op(bio) == REQ_OP_ZONE_RESET) return DM_ENDIO_DONE; - if (bio_op(bio) == REQ_OP_ZONE_REPORT) { - dm_remap_zone_report(ti, bio, fc->start); - return DM_ENDIO_DONE; - } - if (!*error && pb->bio_submitted && (bio_data_dir(bio) == READ)) { if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == READ) && all_corrupt_bio_flags_match(bio, fc)) { @@ -457,6 +448,26 @@ static int flakey_prepare_ioctl(struct dm_target *ti, struct block_device **bdev return 0; } +#ifdef CONFIG_BLK_DEV_ZONED +static int flakey_report_zones(struct dm_target *ti, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask) +{ + struct flakey_c *fc = ti->private; + int ret; + + /* Do report and remap it */ + ret = blkdev_report_zones(fc->dev->bdev, flakey_map_sector(ti, sector), + zones, nr_zones, gfp_mask); + if (ret != 0) + return ret; + + if (*nr_zones) + dm_remap_zone_report(ti, fc->start, zones, nr_zones); + return 0; +} +#endif + static int flakey_iterate_devices(struct dm_target *ti, iterate_devices_callout_fn fn, void *data) { struct flakey_c *fc = ti->private; @@ -469,6 +480,7 @@ static struct target_type flakey_target = { .version = {1, 5, 0}, #ifdef CONFIG_BLK_DEV_ZONED .features = DM_TARGET_ZONED_HM, + .report_zones = flakey_report_zones, #endif .module = THIS_MODULE, .ctr = flakey_ctr, diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 2f7c44a006c4..8d7ddee6ac4d 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -102,19 +102,6 @@ static int linear_map(struct dm_target *ti, struct bio *bio) return DM_MAPIO_REMAPPED; } -#ifdef CONFIG_BLK_DEV_ZONED -static int linear_end_io(struct dm_target *ti, struct bio *bio, - blk_status_t *error) -{ - struct linear_c *lc = ti->private; - - if (!*error && bio_op(bio) == REQ_OP_ZONE_REPORT) - dm_remap_zone_report(ti, bio, lc->start); - - return DM_ENDIO_DONE; -} -#endif - static void linear_status(struct dm_target *ti, status_type_t type, unsigned status_flags, char *result, unsigned maxlen) { @@ -148,6 +135,26 @@ static int linear_prepare_ioctl(struct dm_target *ti, struct block_device **bdev return 0; } +#ifdef CONFIG_BLK_DEV_ZONED +static int linear_report_zones(struct dm_target *ti, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask) +{ + struct linear_c *lc = (struct linear_c *) ti->private; + int ret; + + /* Do report and remap it */ + ret = blkdev_report_zones(lc->dev->bdev, linear_map_sector(ti, sector), + zones, nr_zones, gfp_mask); + if (ret != 0) + return ret; + + if (*nr_zones) + dm_remap_zone_report(ti, lc->start, zones, nr_zones); + return 0; +} +#endif + static int linear_iterate_devices(struct dm_target *ti, iterate_devices_callout_fn fn, void *data) { @@ -211,8 +218,8 @@ static struct target_type linear_target = { .name = "linear", .version = {1, 4, 0}, #ifdef CONFIG_BLK_DEV_ZONED - .end_io = linear_end_io, .features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_ZONED_HM, + .report_zones = linear_report_zones, #else .features = DM_TARGET_PASSES_INTEGRITY, #endif diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 45abb54037fc..6be21dc210a1 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -458,6 +458,57 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) return dm_get_geometry(md, geo); } +static int dm_blk_report_zones(struct gendisk *disk, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask) +{ +#ifdef CONFIG_BLK_DEV_ZONED + struct mapped_device *md = disk->private_data; + struct dm_target *tgt; + struct dm_table *map; + int srcu_idx, ret; + + if (dm_suspended_md(md)) + return -EAGAIN; + + map = dm_get_live_table(md, &srcu_idx); + if (!map) + return -EIO; + + tgt = dm_table_find_target(map, sector); + if (!dm_target_is_valid(tgt)) { + ret = -EIO; + goto out; + } + + /* + * If we are executing this, we already know that the block device + * is a zoned device and so each target should have support for that + * type of drive. A missing report_zones method means that the target + * driver has a problem. + */ + if (WARN_ON(!tgt->type->report_zones)) { + ret = -EIO; + goto out; + } + + /* + * blkdev_report_zones() will loop and call this again to cover all the + * zones of the target, eventually moving on to the next target. + * So there is no need to loop here trying to fill the entire array + * of zones. + */ + ret = tgt->type->report_zones(tgt, sector, zones, + nr_zones, gfp_mask); + +out: + dm_put_live_table(md, srcu_idx); + return ret; +#else + return -ENOTSUPP; +#endif +} + static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx, struct block_device **bdev) __acquires(md->io_barrier) @@ -1155,93 +1206,49 @@ void dm_accept_partial_bio(struct bio *bio, unsigned n_sectors) EXPORT_SYMBOL_GPL(dm_accept_partial_bio); /* - * The zone descriptors obtained with a zone report indicate zone positions - * within the target backing device, regardless of that device is a partition - * and regardless of the target mapping start sector on the device or partition. - * The zone descriptors start sector and write pointer position must be adjusted - * to match their relative position within the dm device. - * A target may call dm_remap_zone_report() after completion of a - * REQ_OP_ZONE_REPORT bio to remap the zone descriptors obtained from the - * backing device. + * The zone descriptors obtained with a zone report indicate + * zone positions within the underlying device of the target. The zone + * descriptors must be remapped to match their position within the dm device. + * The caller target should obtain the zones information using + * blkdev_report_zones() to ensure that remapping for partition offset is + * already handled. */ -void dm_remap_zone_report(struct dm_target *ti, struct bio *bio, sector_t start) +void dm_remap_zone_report(struct dm_target *ti, sector_t start, + struct blk_zone *zones, unsigned int *nr_zones) { #ifdef CONFIG_BLK_DEV_ZONED - struct dm_target_io *tio = container_of(bio, struct dm_target_io, clone); - struct bio *report_bio = tio->io->orig_bio; - struct blk_zone_report_hdr *hdr = NULL; struct blk_zone *zone; - unsigned int nr_rep = 0; - unsigned int ofst; - sector_t part_offset; - struct bio_vec bvec; - struct bvec_iter iter; - void *addr; - - if (bio->bi_status) - return; + unsigned int nrz = *nr_zones; + int i; /* - * bio sector was incremented by the request size on completion. Taking - * into account the original request sector, the target start offset on - * the backing device and the target mapping offset (ti->begin), the - * start sector of the backing device. The partition offset is always 0 - * if the target uses a whole device. + * Remap the start sector and write pointer position of the zones in + * the array. Since we may have obtained from the target underlying + * device more zones that the target size, also adjust the number + * of zones. */ - part_offset = bio->bi_iter.bi_sector + ti->begin - (start + bio_end_sector(report_bio)); - - /* - * Remap the start sector of the reported zones. For sequential zones, - * also remap the write pointer position. - */ - bio_for_each_segment(bvec, report_bio, iter) { - addr = kmap_atomic(bvec.bv_page); - - /* Remember the report header in the first page */ - if (!hdr) { - hdr = addr; - ofst = sizeof(struct blk_zone_report_hdr); - } else - ofst = 0; - - /* Set zones start sector */ - while (hdr->nr_zones && ofst < bvec.bv_len) { - zone = addr + ofst; - zone->start -= part_offset; - if (zone->start >= start + ti->len) { - hdr->nr_zones = 0; - break; - } - zone->start = zone->start + ti->begin - start; - if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL) { - if (zone->cond == BLK_ZONE_COND_FULL) - zone->wp = zone->start + zone->len; - else if (zone->cond == BLK_ZONE_COND_EMPTY) - zone->wp = zone->start; - else - zone->wp = zone->wp + ti->begin - start - part_offset; - } - ofst += sizeof(struct blk_zone); - hdr->nr_zones--; - nr_rep++; + for (i = 0; i < nrz; i++) { + zone = zones + i; + if (zone->start >= start + ti->len) { + memset(zone, 0, sizeof(struct blk_zone) * (nrz - i)); + break; } - if (addr != hdr) - kunmap_atomic(addr); + zone->start = zone->start + ti->begin - start; + if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) + continue; - if (!hdr->nr_zones) - break; + if (zone->cond == BLK_ZONE_COND_FULL) + zone->wp = zone->start + zone->len; + else if (zone->cond == BLK_ZONE_COND_EMPTY) + zone->wp = zone->start; + else + zone->wp = zone->wp + ti->begin - start; } - if (hdr) { - hdr->nr_zones = nr_rep; - kunmap_atomic(hdr); - } - - bio_advance(report_bio, report_bio->bi_iter.bi_size); - + *nr_zones = i; #else /* !CONFIG_BLK_DEV_ZONED */ - bio->bi_status = BLK_STS_NOTSUPP; + *nr_zones = 0; #endif } EXPORT_SYMBOL_GPL(dm_remap_zone_report); @@ -1327,8 +1334,7 @@ static int clone_bio(struct dm_target_io *tio, struct bio *bio, return r; } - if (bio_op(bio) != REQ_OP_ZONE_REPORT) - bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector)); + bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector)); clone->bi_iter.bi_size = to_bytes(len); if (unlikely(bio_integrity(bio) != NULL)) @@ -1541,7 +1547,6 @@ static bool __process_abnormal_io(struct clone_info *ci, struct dm_target *ti, */ static int __split_and_process_non_flush(struct clone_info *ci) { - struct bio *bio = ci->bio; struct dm_target *ti; unsigned len; int r; @@ -1553,11 +1558,7 @@ static int __split_and_process_non_flush(struct clone_info *ci) if (unlikely(__process_abnormal_io(ci, ti, &r))) return r; - if (bio_op(bio) == REQ_OP_ZONE_REPORT) - len = ci->sector_count; - else - len = min_t(sector_t, max_io_len(ci->sector, ti), - ci->sector_count); + len = min_t(sector_t, max_io_len(ci->sector, ti), ci->sector_count); r = __clone_and_map_data_bio(ci, ti, ci->sector, &len); if (r < 0) @@ -1616,9 +1617,6 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md, * We take a clone of the original to store in * ci.io->orig_bio to be used by end_io_acct() and * for dec_pending to use for completion handling. - * As this path is not used for REQ_OP_ZONE_REPORT, - * the usage of io->orig_bio in dm_remap_zone_report() - * won't be affected by this reassignment. */ struct bio *b = bio_split(bio, bio_sectors(bio) - ci.sector_count, GFP_NOIO, &md->queue->bio_split); @@ -3167,6 +3165,7 @@ static const struct block_device_operations dm_blk_dops = { .release = dm_blk_close, .ioctl = dm_blk_ioctl, .getgeo = dm_blk_getgeo, + .report_zones = dm_blk_report_zones, .pr_ops = &dm_pr_ops, .owner = THIS_MODULE }; diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index b762d0fd773c..42c0f299021d 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1272,8 +1272,6 @@ static int sd_init_command(struct scsi_cmnd *cmd) case REQ_OP_READ: case REQ_OP_WRITE: return sd_setup_read_write_cmnd(cmd); - case REQ_OP_ZONE_REPORT: - return sd_zbc_setup_report_cmnd(cmd); case REQ_OP_ZONE_RESET: return sd_zbc_setup_reset_cmnd(cmd); default: @@ -1802,6 +1800,7 @@ static const struct block_device_operations sd_fops = { .check_events = sd_check_events, .revalidate_disk = sd_revalidate_disk, .unlock_native_capacity = sd_unlock_native_capacity, + .report_zones = sd_zbc_report_zones, .pr_ops = &sd_pr_ops, }; @@ -1953,16 +1952,6 @@ static int sd_done(struct scsi_cmnd *SCpnt) scsi_set_resid(SCpnt, blk_rq_bytes(req)); } break; - case REQ_OP_ZONE_REPORT: - if (!result) { - good_bytes = scsi_bufflen(SCpnt) - - scsi_get_resid(SCpnt); - scsi_set_resid(SCpnt, 0); - } else { - good_bytes = 0; - scsi_set_resid(SCpnt, blk_rq_bytes(req)); - } - break; default: /* * In case of bogus fw or device, we could end up having diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index a7d4f50b67d4..f72f20fd0d8b 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -273,10 +273,12 @@ static inline int sd_is_zoned(struct scsi_disk *sdkp) extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer); extern void sd_zbc_remove(struct scsi_disk *sdkp); extern void sd_zbc_print_zones(struct scsi_disk *sdkp); -extern int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd); extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd); extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, struct scsi_sense_hdr *sshdr); +extern int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask); #else /* CONFIG_BLK_DEV_ZONED */ @@ -290,11 +292,6 @@ static inline void sd_zbc_remove(struct scsi_disk *sdkp) {} static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {} -static inline int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd) -{ - return BLKPREP_INVALID; -} - static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd) { return BLKPREP_INVALID; @@ -304,6 +301,8 @@ static inline void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, struct scsi_sense_hdr *sshdr) {} +#define sd_zbc_report_zones NULL + #endif /* CONFIG_BLK_DEV_ZONED */ #endif /* _SCSI_DISK_H */ diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index 0678e1e108b0..0f2cfc81fce3 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -62,7 +62,7 @@ static void sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf, } /** - * sd_zbc_report_zones - Issue a REPORT ZONES scsi command. + * sd_zbc_do_report_zones - Issue a REPORT ZONES scsi command. * @sdkp: The target disk * @buf: Buffer to use for the reply * @buflen: the buffer size @@ -75,9 +75,9 @@ static void sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf, * zones and will only report the count of zones fitting in the command reply * buffer. */ -static int sd_zbc_report_zones(struct scsi_disk *sdkp, unsigned char *buf, - unsigned int buflen, sector_t lba, - bool partial) +static int sd_zbc_do_report_zones(struct scsi_disk *sdkp, unsigned char *buf, + unsigned int buflen, sector_t lba, + bool partial) { struct scsi_device *sdp = sdkp->device; const int timeout = sdp->request_queue->rq_timeout; @@ -118,108 +118,56 @@ static int sd_zbc_report_zones(struct scsi_disk *sdkp, unsigned char *buf, } /** - * sd_zbc_setup_report_cmnd - Prepare a REPORT ZONES scsi command - * @cmd: The command to setup + * sd_zbc_report_zones - Disk report zones operation. + * @disk: The target disk + * @sector: Start 512B sector of the report + * @zones: Array of zone descriptors + * @nr_zones: Number of descriptors in the array + * @gfp_mask: Memory allocation mask * - * Call in sd_init_command() for a REQ_OP_ZONE_REPORT request. + * Execute a report zones command on the target disk. */ -int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd) +int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask) { - struct request *rq = cmd->request; - struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); - sector_t lba, sector = blk_rq_pos(rq); - unsigned int nr_bytes = blk_rq_bytes(rq); - int ret; - - WARN_ON(nr_bytes == 0); + struct scsi_disk *sdkp = scsi_disk(disk); + unsigned int i, buflen, nrz = *nr_zones; + unsigned char *buf; + size_t offset = 0; + int ret = 0; if (!sd_is_zoned(sdkp)) /* Not a zoned device */ - return BLKPREP_KILL; + return -EOPNOTSUPP; - ret = scsi_init_io(cmd); - if (ret != BLKPREP_OK) - return ret; + /* + * Get a reply buffer for the number of requested zones plus a header. + * For ATA, buffers must be aligned to 512B. + */ + buflen = roundup((nrz + 1) * 64, 512); + buf = kmalloc(buflen, gfp_mask); + if (!buf) + return -ENOMEM; - cmd->cmd_len = 16; - memset(cmd->cmnd, 0, cmd->cmd_len); - cmd->cmnd[0] = ZBC_IN; - cmd->cmnd[1] = ZI_REPORT_ZONES; - lba = sectors_to_logical(sdkp->device, sector); - put_unaligned_be64(lba, &cmd->cmnd[2]); - put_unaligned_be32(nr_bytes, &cmd->cmnd[10]); - /* Do partial report for speeding things up */ - cmd->cmnd[14] = ZBC_REPORT_ZONE_PARTIAL; - - cmd->sc_data_direction = DMA_FROM_DEVICE; - cmd->sdb.length = nr_bytes; - cmd->transfersize = sdkp->device->sector_size; - cmd->allowed = 0; - - return BLKPREP_OK; -} - -/** - * sd_zbc_report_zones_complete - Process a REPORT ZONES scsi command reply. - * @scmd: The completed report zones command - * @good_bytes: reply size in bytes - * - * Convert all reported zone descriptors to struct blk_zone. The conversion - * is done in-place, directly in the request specified sg buffer. - */ -static void sd_zbc_report_zones_complete(struct scsi_cmnd *scmd, - unsigned int good_bytes) -{ - struct request *rq = scmd->request; - struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); - struct sg_mapping_iter miter; - struct blk_zone_report_hdr hdr; - struct blk_zone zone; - unsigned int offset, bytes = 0; - unsigned long flags; - u8 *buf; - - if (good_bytes < 64) - return; - - memset(&hdr, 0, sizeof(struct blk_zone_report_hdr)); - - sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), - SG_MITER_TO_SG | SG_MITER_ATOMIC); - - local_irq_save(flags); - while (sg_miter_next(&miter) && bytes < good_bytes) { - - buf = miter.addr; - offset = 0; - - if (bytes == 0) { - /* Set the report header */ - hdr.nr_zones = min_t(unsigned int, - (good_bytes - 64) / 64, - get_unaligned_be32(&buf[0]) / 64); - memcpy(buf, &hdr, sizeof(struct blk_zone_report_hdr)); - offset += 64; - bytes += 64; - } - - /* Parse zone descriptors */ - while (offset < miter.length && hdr.nr_zones) { - WARN_ON(offset > miter.length); - buf = miter.addr + offset; - sd_zbc_parse_report(sdkp, buf, &zone); - memcpy(buf, &zone, sizeof(struct blk_zone)); - offset += 64; - bytes += 64; - hdr.nr_zones--; - } - - if (!hdr.nr_zones) - break; + ret = sd_zbc_do_report_zones(sdkp, buf, buflen, + sectors_to_logical(sdkp->device, sector), true); + if (ret) + goto out_free_buf; + nrz = min(nrz, get_unaligned_be32(&buf[0]) / 64); + for (i = 0; i < nrz; i++) { + offset += 64; + sd_zbc_parse_report(sdkp, buf + offset, zones); + zones++; } - sg_miter_stop(&miter); - local_irq_restore(flags); + + *nr_zones = nrz; + +out_free_buf: + kfree(buf); + + return ret; } /** @@ -302,13 +250,6 @@ void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, case REQ_OP_WRITE_ZEROES: case REQ_OP_WRITE_SAME: break; - - case REQ_OP_ZONE_REPORT: - - if (!result) - sd_zbc_report_zones_complete(cmd, good_bytes); - break; - } } @@ -390,7 +331,7 @@ static int sd_zbc_check_zones(struct scsi_disk *sdkp, u32 *zblocks) return -ENOMEM; /* Do a report zone to get max_lba and the same field */ - ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, 0, false); + ret = sd_zbc_do_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, 0, false); if (ret) goto out_free; @@ -447,8 +388,8 @@ static int sd_zbc_check_zones(struct scsi_disk *sdkp, u32 *zblocks) } if (block < sdkp->capacity) { - ret = sd_zbc_report_zones(sdkp, buf, - SD_ZBC_BUF_SIZE, block, true); + ret = sd_zbc_do_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, + block, true); if (ret) goto out_free; } @@ -565,8 +506,8 @@ sd_zbc_setup_seq_zones_bitmap(struct scsi_disk *sdkp, u32 zone_shift, goto out; while (lba < sdkp->capacity) { - ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, - lba, true); + ret = sd_zbc_do_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, lba, + true); if (ret) goto out; lba = sd_zbc_get_seq_zones(sdkp, buf, SD_ZBC_BUF_SIZE, diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 9578c7ab1eb6..093a818c5b68 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -283,8 +283,6 @@ enum req_opf { REQ_OP_FLUSH = 2, /* discard sectors */ REQ_OP_DISCARD = 3, - /* get zone information */ - REQ_OP_ZONE_REPORT = 4, /* securely erase sectors */ REQ_OP_SECURE_ERASE = 5, /* seset a zone write pointer */ diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 6bb845f9601a..51fe6472ce02 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -396,11 +396,6 @@ struct queue_limits { #ifdef CONFIG_BLK_DEV_ZONED -struct blk_zone_report_hdr { - unsigned int nr_zones; - u8 padding[60]; -}; - extern unsigned int blkdev_nr_zones(struct block_device *bdev); extern int blkdev_report_zones(struct block_device *bdev, sector_t sector, struct blk_zone *zones, @@ -1867,6 +1862,9 @@ struct block_device_operations { int (*getgeo)(struct block_device *, struct hd_geometry *); /* this callback is with swap_lock and sometimes page table lock held */ void (*swap_slot_free_notify) (struct block_device *, unsigned long); + int (*report_zones)(struct gendisk *, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask); struct module *owner; const struct pr_ops *pr_ops; }; diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 6fb0808e87c8..a23b396a8edc 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -92,6 +92,11 @@ typedef int (*dm_message_fn) (struct dm_target *ti, unsigned argc, char **argv, typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **bdev); +typedef int (*dm_report_zones_fn) (struct dm_target *ti, sector_t sector, + struct blk_zone *zones, + unsigned int *nr_zones, + gfp_t gfp_mask); + /* * These iteration functions are typically used to check (and combine) * properties of underlying devices. @@ -180,6 +185,9 @@ struct target_type { dm_status_fn status; dm_message_fn message; dm_prepare_ioctl_fn prepare_ioctl; +#ifdef CONFIG_BLK_DEV_ZONED + dm_report_zones_fn report_zones; +#endif dm_busy_fn busy; dm_iterate_devices_fn iterate_devices; dm_io_hints_fn io_hints; @@ -420,8 +428,8 @@ struct gendisk *dm_disk(struct mapped_device *md); int dm_suspended(struct dm_target *ti); int dm_noflush_suspending(struct dm_target *ti); void dm_accept_partial_bio(struct bio *bio, unsigned n_sectors); -void dm_remap_zone_report(struct dm_target *ti, struct bio *bio, - sector_t start); +void dm_remap_zone_report(struct dm_target *ti, sector_t start, + struct blk_zone *zones, unsigned int *nr_zones); union map_info *dm_get_rq_mapinfo(struct request *rq); struct queue_limits *dm_get_queue_limits(struct mapped_device *md); diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h index 795698925d20..3ec73f17ee2a 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -82,7 +82,6 @@ TRACE_DEFINE_ENUM(CP_TRIMMED); { REQ_OP_WRITE, "WRITE" }, \ { REQ_OP_FLUSH, "FLUSH" }, \ { REQ_OP_DISCARD, "DISCARD" }, \ - { REQ_OP_ZONE_REPORT, "ZONE_REPORT" }, \ { REQ_OP_SECURE_ERASE, "SECURE_ERASE" }, \ { REQ_OP_ZONE_RESET, "ZONE_RESET" }, \ { REQ_OP_WRITE_SAME, "WRITE_SAME" }, \ From bf5054569653c491ece544cc7ee333ae53b47121 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Fri, 12 Oct 2018 19:08:50 +0900 Subject: [PATCH 14/18] block: Introduce blk_revalidate_disk_zones() Drivers exposing zoned block devices have to initialize and maintain correctness (i.e. revalidate) of the device zone bitmaps attached to the device request queue (seq_zones_bitmap and seq_zones_wlock). To simplify coding this, introduce a generic helper function blk_revalidate_disk_zones() suitable for most (and likely all) cases. This new function always update the seq_zones_bitmap and seq_zones_wlock bitmaps as well as the queue nr_zones field when called for a disk using a request based queue. For a disk using a BIO based queue, only the number of zones is updated since these queues do not have schedulers and so do not need the zone bitmaps. With this change, the zone bitmap initialization code in sd_zbc.c can be replaced with a call to this function in sd_zbc_read_zones(), which is called from the disk revalidate block operation method. A call to blk_revalidate_disk_zones() is also added to the null_blk driver for devices created with the zoned mode enabled. Finally, to ensure that zoned devices created with dm-linear or dm-flakey expose the correct number of zones through sysfs, a call to blk_revalidate_disk_zones() is added to dm_table_set_restrictions(). The zone bitmaps allocated and initialized with blk_revalidate_disk_zones() are freed automatically from __blk_release_queue() using the block internal function blk_queue_free_zone_bitmaps(). Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Reviewed-by: Mike Snitzer Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe --- block/blk-sysfs.c | 2 + block/blk-zoned.c | 136 +++++++++++++++++++++ block/blk.h | 6 + drivers/block/null_blk_main.c | 7 ++ drivers/md/dm-table.c | 10 ++ drivers/scsi/sd.c | 2 - drivers/scsi/sd.h | 4 - drivers/scsi/sd_zbc.c | 218 ++++------------------------------ include/linux/blkdev.h | 7 ++ 9 files changed, 194 insertions(+), 198 deletions(-) diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 92be8092ca4f..0641533597f1 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -852,6 +852,8 @@ static void __blk_release_queue(struct work_struct *work) if (q->queue_tags) __blk_queue_free_tags(q); + blk_queue_free_zone_bitmaps(q); + if (!q->mq_ops) { if (q->exit_rq_fn) q->exit_rq_fn(q, q->fq->flush_rq); diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 90cf503091d5..13ba2011a306 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -12,6 +12,7 @@ #include #include #include +#include #include "blk.h" @@ -359,3 +360,138 @@ int blkdev_reset_zones_ioctl(struct block_device *bdev, fmode_t mode, return blkdev_reset_zones(bdev, zrange.sector, zrange.nr_sectors, GFP_KERNEL); } + +static inline unsigned long *blk_alloc_zone_bitmap(int node, + unsigned int nr_zones) +{ + return kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(unsigned long), + GFP_NOIO, node); +} + +/* + * Allocate an array of struct blk_zone to get nr_zones zone information. + * The allocated array may be smaller than nr_zones. + */ +static struct blk_zone *blk_alloc_zones(int node, unsigned int *nr_zones) +{ + size_t size = *nr_zones * sizeof(struct blk_zone); + struct page *page; + int order; + + for (order = get_order(size); order > 0; order--) { + page = alloc_pages_node(node, GFP_NOIO | __GFP_ZERO, order); + if (page) { + *nr_zones = min_t(unsigned int, *nr_zones, + (PAGE_SIZE << order) / sizeof(struct blk_zone)); + return page_address(page); + } + } + + return NULL; +} + +void blk_queue_free_zone_bitmaps(struct request_queue *q) +{ + kfree(q->seq_zones_bitmap); + q->seq_zones_bitmap = NULL; + kfree(q->seq_zones_wlock); + q->seq_zones_wlock = NULL; +} + +/** + * blk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps + * @disk: Target disk + * + * Helper function for low-level device drivers to (re) allocate and initialize + * a disk request queue zone bitmaps. This functions should normally be called + * within the disk ->revalidate method. For BIO based queues, no zone bitmap + * is allocated. + */ +int blk_revalidate_disk_zones(struct gendisk *disk) +{ + struct request_queue *q = disk->queue; + unsigned int nr_zones = __blkdev_nr_zones(q, get_capacity(disk)); + unsigned long *seq_zones_wlock = NULL, *seq_zones_bitmap = NULL; + unsigned int i, rep_nr_zones = 0, z = 0, nrz; + struct blk_zone *zones = NULL; + sector_t sector = 0; + int ret = 0; + + /* + * BIO based queues do not use a scheduler so only q->nr_zones + * needs to be updated so that the sysfs exposed value is correct. + */ + if (!queue_is_rq_based(q)) { + q->nr_zones = nr_zones; + return 0; + } + + if (!blk_queue_is_zoned(q) || !nr_zones) { + nr_zones = 0; + goto update; + } + + /* Allocate bitmaps */ + ret = -ENOMEM; + seq_zones_wlock = blk_alloc_zone_bitmap(q->node, nr_zones); + if (!seq_zones_wlock) + goto out; + seq_zones_bitmap = blk_alloc_zone_bitmap(q->node, nr_zones); + if (!seq_zones_bitmap) + goto out; + + /* Get zone information and initialize seq_zones_bitmap */ + rep_nr_zones = nr_zones; + zones = blk_alloc_zones(q->node, &rep_nr_zones); + if (!zones) + goto out; + + while (z < nr_zones) { + nrz = min(nr_zones - z, rep_nr_zones); + ret = blk_report_zones(disk, sector, zones, &nrz, GFP_NOIO); + if (ret) + goto out; + if (!nrz) + break; + for (i = 0; i < nrz; i++) { + if (zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL) + set_bit(z, seq_zones_bitmap); + z++; + } + sector += nrz * blk_queue_zone_sectors(q); + } + + if (WARN_ON(z != nr_zones)) { + ret = -EIO; + goto out; + } + +update: + /* + * Install the new bitmaps, making sure the queue is stopped and + * all I/Os are completed (i.e. a scheduler is not referencing the + * bitmaps). + */ + blk_mq_freeze_queue(q); + q->nr_zones = nr_zones; + swap(q->seq_zones_wlock, seq_zones_wlock); + swap(q->seq_zones_bitmap, seq_zones_bitmap); + blk_mq_unfreeze_queue(q); + +out: + free_pages((unsigned long)zones, + get_order(rep_nr_zones * sizeof(struct blk_zone))); + kfree(seq_zones_wlock); + kfree(seq_zones_bitmap); + + if (ret) { + pr_warn("%s: failed to revalidate zones\n", disk->disk_name); + blk_mq_freeze_queue(q); + blk_queue_free_zone_bitmaps(q); + blk_mq_unfreeze_queue(q); + } + + return ret; +} +EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones); + diff --git a/block/blk.h b/block/blk.h index 93574baaa6b8..a1841b8ff129 100644 --- a/block/blk.h +++ b/block/blk.h @@ -490,4 +490,10 @@ static inline int blk_iolatency_init(struct request_queue *q) { return 0; } struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp); +#ifdef CONFIG_BLK_DEV_ZONED +void blk_queue_free_zone_bitmaps(struct request_queue *q); +#else +static inline void blk_queue_free_zone_bitmaps(struct request_queue *q) {} +#endif + #endif /* BLK_INTERNAL_H */ diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index 5ba426dbf377..09339203dfba 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -1528,6 +1528,13 @@ static int null_gendisk_register(struct nullb *nullb) disk->queue = nullb->q; strncpy(disk->disk_name, nullb->disk_name, DISK_NAME_LEN); + if (nullb->dev->zoned) { + int ret = blk_revalidate_disk_zones(disk); + + if (ret != 0) + return ret; + } + add_disk(disk); return 0; } diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 3d0e2c198f06..fb4bea20657b 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1937,6 +1937,16 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, */ if (blk_queue_add_random(q) && dm_table_all_devices_attribute(t, device_is_not_random)) blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q); + + /* + * For a zoned target, the number of zones should be updated for the + * correct value to be exposed in sysfs queue/nr_zones. For a BIO based + * target, this is all that is needed. For a request based target, the + * queue zone bitmaps must also be updated. + * Use blk_revalidate_disk_zones() to handle this. + */ + if (blk_queue_is_zoned(q)) + blk_revalidate_disk_zones(t->md->disk); } unsigned int dm_table_get_num_targets(struct dm_table *t) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 42c0f299021d..3bb2b3351e35 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3414,8 +3414,6 @@ static int sd_remove(struct device *dev) del_gendisk(sdkp->disk); sd_shutdown(dev); - sd_zbc_remove(sdkp); - free_opal_dev(sdkp->opal_dev); blk_register_region(devt, SD_MINORS, NULL, diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index f72f20fd0d8b..1d63f3a23ffb 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -76,7 +76,6 @@ struct scsi_disk { #ifdef CONFIG_BLK_DEV_ZONED u32 nr_zones; u32 zone_blocks; - u32 zone_shift; u32 zones_optimal_open; u32 zones_optimal_nonseq; u32 zones_max_open; @@ -271,7 +270,6 @@ static inline int sd_is_zoned(struct scsi_disk *sdkp) #ifdef CONFIG_BLK_DEV_ZONED extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer); -extern void sd_zbc_remove(struct scsi_disk *sdkp); extern void sd_zbc_print_zones(struct scsi_disk *sdkp); extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd); extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, @@ -288,8 +286,6 @@ static inline int sd_zbc_read_zones(struct scsi_disk *sdkp, return 0; } -static inline void sd_zbc_remove(struct scsi_disk *sdkp) {} - static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {} static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd) diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index 0f2cfc81fce3..e06c48c866e4 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -425,191 +425,10 @@ out_free: return ret; } -/** - * sd_zbc_alloc_zone_bitmap - Allocate a zone bitmap (one bit per zone). - * @nr_zones: Number of zones to allocate space for. - * @numa_node: NUMA node to allocate the memory from. - */ -static inline unsigned long * -sd_zbc_alloc_zone_bitmap(u32 nr_zones, int numa_node) -{ - return kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(unsigned long), - GFP_KERNEL, numa_node); -} - -/** - * sd_zbc_get_seq_zones - Parse report zones reply to identify sequential zones - * @sdkp: disk used - * @buf: report reply buffer - * @buflen: length of @buf - * @zone_shift: logarithm base 2 of the number of blocks in a zone - * @seq_zones_bitmap: bitmap of sequential zones to set - * - * Parse reported zone descriptors in @buf to identify sequential zones and - * set the reported zone bit in @seq_zones_bitmap accordingly. - * Since read-only and offline zones cannot be written, do not - * mark them as sequential in the bitmap. - * Return the LBA after the last zone reported. - */ -static sector_t sd_zbc_get_seq_zones(struct scsi_disk *sdkp, unsigned char *buf, - unsigned int buflen, u32 zone_shift, - unsigned long *seq_zones_bitmap) -{ - sector_t lba, next_lba = sdkp->capacity; - unsigned int buf_len, list_length; - unsigned char *rec; - u8 type, cond; - - list_length = get_unaligned_be32(&buf[0]) + 64; - buf_len = min(list_length, buflen); - rec = buf + 64; - - while (rec < buf + buf_len) { - type = rec[0] & 0x0f; - cond = (rec[1] >> 4) & 0xf; - lba = get_unaligned_be64(&rec[16]); - if (type != ZBC_ZONE_TYPE_CONV && - cond != ZBC_ZONE_COND_READONLY && - cond != ZBC_ZONE_COND_OFFLINE) - set_bit(lba >> zone_shift, seq_zones_bitmap); - next_lba = lba + get_unaligned_be64(&rec[8]); - rec += 64; - } - - return next_lba; -} - -/** - * sd_zbc_setup_seq_zones_bitmap - Initialize a seq zone bitmap. - * @sdkp: target disk - * @zone_shift: logarithm base 2 of the number of blocks in a zone - * @nr_zones: number of zones to set up a seq zone bitmap for - * - * Allocate a zone bitmap and initialize it by identifying sequential zones. - */ -static unsigned long * -sd_zbc_setup_seq_zones_bitmap(struct scsi_disk *sdkp, u32 zone_shift, - u32 nr_zones) -{ - struct request_queue *q = sdkp->disk->queue; - unsigned long *seq_zones_bitmap; - sector_t lba = 0; - unsigned char *buf; - int ret = -ENOMEM; - - seq_zones_bitmap = sd_zbc_alloc_zone_bitmap(nr_zones, q->node); - if (!seq_zones_bitmap) - return ERR_PTR(-ENOMEM); - - buf = kmalloc(SD_ZBC_BUF_SIZE, GFP_KERNEL); - if (!buf) - goto out; - - while (lba < sdkp->capacity) { - ret = sd_zbc_do_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, lba, - true); - if (ret) - goto out; - lba = sd_zbc_get_seq_zones(sdkp, buf, SD_ZBC_BUF_SIZE, - zone_shift, seq_zones_bitmap); - } - - if (lba != sdkp->capacity) { - /* Something went wrong */ - ret = -EIO; - } - -out: - kfree(buf); - if (ret) { - kfree(seq_zones_bitmap); - return ERR_PTR(ret); - } - return seq_zones_bitmap; -} - -static void sd_zbc_cleanup(struct scsi_disk *sdkp) -{ - struct request_queue *q = sdkp->disk->queue; - - kfree(q->seq_zones_bitmap); - q->seq_zones_bitmap = NULL; - - kfree(q->seq_zones_wlock); - q->seq_zones_wlock = NULL; - - q->nr_zones = 0; -} - -static int sd_zbc_setup(struct scsi_disk *sdkp, u32 zone_blocks) -{ - struct request_queue *q = sdkp->disk->queue; - u32 zone_shift = ilog2(zone_blocks); - u32 nr_zones; - int ret; - - /* chunk_sectors indicates the zone size */ - blk_queue_chunk_sectors(q, - logical_to_sectors(sdkp->device, zone_blocks)); - nr_zones = round_up(sdkp->capacity, zone_blocks) >> zone_shift; - - /* - * Initialize the device request queue information if the number - * of zones changed. - */ - if (nr_zones != sdkp->nr_zones || nr_zones != q->nr_zones) { - unsigned long *seq_zones_wlock = NULL, *seq_zones_bitmap = NULL; - size_t zone_bitmap_size; - - if (nr_zones) { - seq_zones_wlock = sd_zbc_alloc_zone_bitmap(nr_zones, - q->node); - if (!seq_zones_wlock) { - ret = -ENOMEM; - goto err; - } - - seq_zones_bitmap = sd_zbc_setup_seq_zones_bitmap(sdkp, - zone_shift, nr_zones); - if (IS_ERR(seq_zones_bitmap)) { - ret = PTR_ERR(seq_zones_bitmap); - kfree(seq_zones_wlock); - goto err; - } - } - zone_bitmap_size = BITS_TO_LONGS(nr_zones) * - sizeof(unsigned long); - blk_mq_freeze_queue(q); - if (q->nr_zones != nr_zones) { - /* READ16/WRITE16 is mandatory for ZBC disks */ - sdkp->device->use_16_for_rw = 1; - sdkp->device->use_10_for_rw = 0; - - sdkp->zone_blocks = zone_blocks; - sdkp->zone_shift = zone_shift; - sdkp->nr_zones = nr_zones; - q->nr_zones = nr_zones; - swap(q->seq_zones_wlock, seq_zones_wlock); - swap(q->seq_zones_bitmap, seq_zones_bitmap); - } else if (memcmp(q->seq_zones_bitmap, seq_zones_bitmap, - zone_bitmap_size) != 0) { - memcpy(q->seq_zones_bitmap, seq_zones_bitmap, - zone_bitmap_size); - } - blk_mq_unfreeze_queue(q); - kfree(seq_zones_wlock); - kfree(seq_zones_bitmap); - } - - return 0; - -err: - sd_zbc_cleanup(sdkp); - return ret; -} - int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf) { + struct gendisk *disk = sdkp->disk; + unsigned int nr_zones; u32 zone_blocks; int ret; @@ -634,24 +453,39 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf) goto err; /* The drive satisfies the kernel restrictions: set it up */ - ret = sd_zbc_setup(sdkp, zone_blocks); - if (ret) - goto err; + blk_queue_chunk_sectors(sdkp->disk->queue, + logical_to_sectors(sdkp->device, zone_blocks)); + nr_zones = round_up(sdkp->capacity, zone_blocks) >> ilog2(zone_blocks); + + /* READ16/WRITE16 is mandatory for ZBC disks */ + sdkp->device->use_16_for_rw = 1; + sdkp->device->use_10_for_rw = 0; + + /* + * If something changed, revalidate the disk zone bitmaps once we have + * the capacity, that is on the second revalidate execution during disk + * scan and always during normal revalidate. + */ + if (sdkp->first_scan) + return 0; + if (sdkp->zone_blocks != zone_blocks || + sdkp->nr_zones != nr_zones || + disk->queue->nr_zones != nr_zones) { + ret = blk_revalidate_disk_zones(disk); + if (ret != 0) + goto err; + sdkp->zone_blocks = zone_blocks; + sdkp->nr_zones = nr_zones; + } return 0; err: sdkp->capacity = 0; - sd_zbc_cleanup(sdkp); return ret; } -void sd_zbc_remove(struct scsi_disk *sdkp) -{ - sd_zbc_cleanup(sdkp); -} - void sd_zbc_print_zones(struct scsi_disk *sdkp) { if (!sd_is_zoned(sdkp) || !sdkp->capacity) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 51fe6472ce02..4293dc1cd160 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -402,6 +402,7 @@ extern int blkdev_report_zones(struct block_device *bdev, unsigned int *nr_zones, gfp_t gfp_mask); extern int blkdev_reset_zones(struct block_device *bdev, sector_t sectors, sector_t nr_sectors, gfp_t gfp_mask); +extern int blk_revalidate_disk_zones(struct gendisk *disk); extern int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg); @@ -414,6 +415,12 @@ static inline unsigned int blkdev_nr_zones(struct block_device *bdev) { return 0; } + +static inline int blk_revalidate_disk_zones(struct gendisk *disk) +{ + return 0; +} + static inline int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) From d6f1dda27251909a27b8d8aacb498628a1047978 Mon Sep 17 00:00:00 2001 From: Xiaoguang Wang Date: Tue, 23 Oct 2018 22:30:50 +0800 Subject: [PATCH 15/18] blk-mq: place trace_block_getrq() in correct place trace_block_getrq() is to indicate a request struct has been allocated for queue, so put it in right place. Reviewed-by: Jianchao Wang Signed-off-by: Xiaoguang Wang Signed-off-by: Jens Axboe --- block/blk-mq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index dcf10e39995a..3f91c6e5b17a 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1850,8 +1850,6 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) rq_qos_throttle(q, bio, NULL); - trace_block_getrq(q, bio, bio->bi_opf); - rq = blk_mq_get_request(q, bio, bio->bi_opf, &data); if (unlikely(!rq)) { rq_qos_cleanup(q, bio); @@ -1860,6 +1858,8 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) return BLK_QC_T_NONE; } + trace_block_getrq(q, bio, bio->bi_opf); + rq_qos_track(q, rq, bio); cookie = request_to_qc_t(data.hctx, rq); From 0a40a93524736c2ce01d82effe2f2bc34d5cf159 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 25 Oct 2018 08:15:30 -0600 Subject: [PATCH 16/18] gdrom: fix mistake in assignment of error Apparently the kbuild bots missed this one originally, but at least it caught it now. Fix compilation error: All errors (new ones prefixed by >>): drivers/cdrom/gdrom.c: In function 'probe_gdrom': >> drivers/cdrom/gdrom.c:797:3: error: 'rc' undeclared (first use in this function) rc = PTR_ERR(gd.gdrom_rq); ^~ drivers/cdrom/gdrom.c:797:3: note: each undeclared identifier is reported only once for each function it appears in Fixes: ad5fc6bb7221 ("gdrom: convert to blk-mq") Signed-off-by: Jens Axboe --- drivers/cdrom/gdrom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c index b45c543c571a..a5b8afe3609c 100644 --- a/drivers/cdrom/gdrom.c +++ b/drivers/cdrom/gdrom.c @@ -794,7 +794,7 @@ static int probe_gdrom(struct platform_device *devptr) gd.gdrom_rq = blk_mq_init_sq_queue(&gd.tag_set, &gdrom_mq_ops, 1, BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING); if (IS_ERR(gd.gdrom_rq)) { - rc = PTR_ERR(gd.gdrom_rq); + err = PTR_ERR(gd.gdrom_rq); gd.gdrom_rq = NULL; goto probe_fail_requestq; } From 98fa7a3e001b21fb47c08af4304f40a3b0535cbd Mon Sep 17 00:00:00 2001 From: Federico Motta Date: Wed, 24 Oct 2018 19:13:25 +0200 Subject: [PATCH 17/18] block, bfq: fix asymmetric scenarios detection Since commit 2d29c9f89fcd ("block, bfq: improve asymmetric scenarios detection"), a scenario is defined asymmetric when one of the following conditions holds: - active bfq_queues have different weights - one or more group of entities (bfq_queue or other groups of entities) are active bfq grants fairness and low latency also in such asymmetric scenarios, by plugging the dispatching of I/O if the bfq_queue in service happens to be temporarily idle. This plugging may lower throughput, so it is important to do it only when strictly needed. By mistake, in commit '2d29c9f89fcd' ("block, bfq: improve asymmetric scenarios detection") the num_active_groups counter was firstly incremented and subsequently decremented at any entity (group or bfq_queue) weight change. This is useless, because only transitions from active to inactive and vice versa matter for that counter. Unfortunately this is also incorrect in the following case: the entity at issue is a bfq_queue and it is under weight raising. In fact in this case there is a spurious increment of the num_active_groups counter. This spurious increment may cause scenarios to be wrongly detected as asymmetric, thus causing useless plugging and loss of throughput. This commit fixes this issue by simply removing the above useless and wrong increments and decrements. Fixes: 2d29c9f89fcd ("block, bfq: improve asymmetric scenarios detection") Tested-by: Oleksandr Natalenko Signed-off-by: Federico Motta Signed-off-by: Paolo Valente Signed-off-by: Jens Axboe --- block/bfq-wf2q.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/block/bfq-wf2q.c b/block/bfq-wf2q.c index 476b5a90a5a4..4b0d5fb69160 100644 --- a/block/bfq-wf2q.c +++ b/block/bfq-wf2q.c @@ -792,24 +792,18 @@ __bfq_entity_update_weight_prio(struct bfq_service_tree *old_st, * queue, remove the entity from its old weight counter (if * there is a counter associated with the entity). */ - if (prev_weight != new_weight) { - if (bfqq) { - root = &bfqd->queue_weights_tree; - __bfq_weights_tree_remove(bfqd, bfqq, root); - } else - bfqd->num_active_groups--; + if (prev_weight != new_weight && bfqq) { + root = &bfqd->queue_weights_tree; + __bfq_weights_tree_remove(bfqd, bfqq, root); } entity->weight = new_weight; /* * Add the entity, if it is not a weight-raised queue, * to the counter associated with its new weight. */ - if (prev_weight != new_weight) { - if (bfqq && bfqq->wr_coeff == 1) { - /* If we get here, root has been initialized. */ - bfq_weights_tree_add(bfqd, bfqq, root); - } else - bfqd->num_active_groups++; + if (prev_weight != new_weight && bfqq && bfqq->wr_coeff == 1) { + /* If we get here, root has been initialized. */ + bfq_weights_tree_add(bfqd, bfqq, root); } new_st->wsum += entity->weight; From a435ab4f80f983c53b4ca4f8c12b3ddd3ca17670 Mon Sep 17 00:00:00 2001 From: Diego Viola Date: Fri, 26 Oct 2018 10:45:16 -0300 Subject: [PATCH 18/18] libata: Apply NOLPM quirk for SAMSUNG MZ7TD256HAFV-000L9 med_power_with_dipm causes my T450 to freeze with a SAMSUNG MZ7TD256HAFV-000L9 SSD (firmware DXT02L5Q). Switching the LPM to max_performance fixes this issue. Acked-by: Hans de Goede Signed-off-by: Diego Viola Signed-off-by: Jens Axboe --- drivers/ata/libata-core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index a9dd4ea7467d..6e594644cb1d 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4553,6 +4553,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = { /* These specific Samsung models/firmware-revs do not handle LPM well */ { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM, }, { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM, }, + { "SAMSUNG MZ7TD256HAFV-000L9", "DXT02L5Q", ATA_HORKAGE_NOLPM, }, /* devices that don't properly handle queued TRIM commands */ { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |