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for-linus-20181026

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Merge tag 'for-linus-20181026' of git://git.kernel.dk/linux-block

Pull more block layer updates from Jens Axboe:

 - Set of patches improving support for zoned devices. This was ready
   before the merge window, but I was late in picking it up and hence it
   missed the original pull request (Damien, Christoph)

 - libata no link power management quirk addition for a Samsung drive
   (Diego Viola)

 - Fix for a performance regression in BFQ that went into this merge
   window (Federico Motta)

 - Fix for a missing dma mask setting return value check (Gustavo)

 - Typo in the gdrom queue failure case (me)

 - NULL pointer deref fix for xen-blkfront (Vasilis Liaskovitis)

 - Fixing the get_rq trace point placement in blk-mq (Xiaoguang Wang)

 - Removal of a set-but-not-read variable in cdrom (zhong jiang)

* tag 'for-linus-20181026' of git://git.kernel.dk/linux-block:
  libata: Apply NOLPM quirk for SAMSUNG MZ7TD256HAFV-000L9
  block, bfq: fix asymmetric scenarios detection
  gdrom: fix mistake in assignment of error
  blk-mq: place trace_block_getrq() in correct place
  block: Introduce blk_revalidate_disk_zones()
  block: add a report_zones method
  block: Expose queue nr_zones in sysfs
  block: Improve zone reset execution
  block: Introduce BLKGETNRZONES ioctl
  block: Introduce BLKGETZONESZ ioctl
  block: Limit allocation of zone descriptors for report zones
  block: Introduce blkdev_nr_zones() helper
  scsi: sd_zbc: Fix sd_zbc_check_zones() error checks
  scsi: sd_zbc: Reduce boot device scan and revalidate time
  scsi: sd_zbc: Rearrange code
  cdrom: remove set but not used variable 'tocuse'
  skd: fix unchecked return values
  xen/blkfront: avoid NULL blkfront_info dereference on device removal
This commit is contained in:
Linus Torvalds 2018-10-26 12:43:13 -07:00
commit 6080ad3a99
29 changed files with 620 additions and 741 deletions
Download patch file Download diff file Expand all files Collapse all files

30
drivers/md/dm-flakey.c
View file

@ -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,

35
drivers/md/dm-linear.c
View file

@ -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

10
drivers/md/dm-table.c
View file

@ -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)

3
drivers/md/dm-zoned-target.c
View file

@ -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;

169
drivers/md/dm.c
View file

@ -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
};