diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-21 22:02:48 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-21 22:02:48 +0300 |
commit | 582cd91f69de8e44857cb610ebca661dac8656b7 (patch) | |
tree | 0d680db02a5c236ee87b408b3f13ce33ebaca907 /block/partitions/core.c | |
parent | bd018bbaa58640da786d4289563e71c5ef3938c7 (diff) | |
parent | f885056a48ccf4ad4332def91e973f3993fa8695 (diff) |
Merge tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block
Pull core block updates from Jens Axboe:
"Another nice round of removing more code than what is added, mostly
due to Christoph's relentless pursuit of tech debt removal/cleanups.
This pull request contains:
- Two series of BFQ improvements (Paolo, Jan, Jia)
- Block iov_iter improvements (Pavel)
- bsg error path fix (Pan)
- blk-mq scheduler improvements (Jan)
- -EBUSY discard fix (Jan)
- bvec allocation improvements (Ming, Christoph)
- bio allocation and init improvements (Christoph)
- Store bdev pointer in bio instead of gendisk + partno (Christoph)
- Block trace point cleanups (Christoph)
- hard read-only vs read-only split (Christoph)
- Block based swap cleanups (Christoph)
- Zoned write granularity support (Damien)
- Various fixes/tweaks (Chunguang, Guoqing, Lei, Lukas, Huhai)"
* tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block: (104 commits)
mm: simplify swapdev_block
sd_zbc: clear zone resources for non-zoned case
block: introduce blk_queue_clear_zone_settings()
zonefs: use zone write granularity as block size
block: introduce zone_write_granularity limit
block: use blk_queue_set_zoned in add_partition()
nullb: use blk_queue_set_zoned() to setup zoned devices
nvme: cleanup zone information initialization
block: document zone_append_max_bytes attribute
block: use bi_max_vecs to find the bvec pool
md/raid10: remove dead code in reshape_request
block: mark the bio as cloned in bio_iov_bvec_set
block: set BIO_NO_PAGE_REF in bio_iov_bvec_set
block: remove a layer of indentation in bio_iov_iter_get_pages
block: turn the nr_iovecs argument to bio_alloc* into an unsigned short
block: remove the 1 and 4 vec bvec_slabs entries
block: streamline bvec_alloc
block: factor out a bvec_alloc_gfp helper
block: move struct biovec_slab to bio.c
block: reuse BIO_INLINE_VECS for integrity bvecs
...
Diffstat (limited to 'block/partitions/core.c')
-rw-r--r-- | block/partitions/core.c | 36 |
1 files changed, 8 insertions, 28 deletions
diff --git a/block/partitions/core.c b/block/partitions/core.c index 4601a845cd79..f3d9ff2cafb6 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -197,7 +197,7 @@ static ssize_t part_start_show(struct device *dev, static ssize_t part_ro_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", dev_to_bdev(dev)->bd_read_only); + return sprintf(buf, "%d\n", bdev_read_only(dev_to_bdev(dev))); } static ssize_t part_alignment_offset_show(struct device *dev, @@ -289,13 +289,7 @@ struct device_type part_type = { */ void delete_partition(struct block_device *part) { - struct gendisk *disk = part->bd_disk; - struct disk_part_tbl *ptbl = - rcu_dereference_protected(disk->part_tbl, 1); - - rcu_assign_pointer(ptbl->part[part->bd_partno], NULL); - rcu_assign_pointer(ptbl->last_lookup, NULL); - + xa_erase(&part->bd_disk->part_tbl, part->bd_partno); kobject_put(part->bd_holder_dir); device_del(&part->bd_device); @@ -327,7 +321,6 @@ static struct block_device *add_partition(struct gendisk *disk, int partno, struct device *ddev = disk_to_dev(disk); struct device *pdev; struct block_device *bdev; - struct disk_part_tbl *ptbl; const char *dname; int err; @@ -343,18 +336,13 @@ static struct block_device *add_partition(struct gendisk *disk, int partno, case BLK_ZONED_HA: pr_info("%s: disabling host aware zoned block device support due to partitions\n", disk->disk_name); - disk->queue->limits.zoned = BLK_ZONED_NONE; + blk_queue_set_zoned(disk, BLK_ZONED_NONE); break; case BLK_ZONED_NONE: break; } - err = disk_expand_part_tbl(disk, partno); - if (err) - return ERR_PTR(err); - ptbl = rcu_dereference_protected(disk->part_tbl, 1); - - if (ptbl->part[partno]) + if (xa_load(&disk->part_tbl, partno)) return ERR_PTR(-EBUSY); bdev = bdev_alloc(disk, partno); @@ -363,7 +351,6 @@ static struct block_device *add_partition(struct gendisk *disk, int partno, bdev->bd_start_sect = start; bdev_set_nr_sectors(bdev, len); - bdev->bd_read_only = get_disk_ro(disk); if (info) { err = -ENOMEM; @@ -408,8 +395,10 @@ static struct block_device *add_partition(struct gendisk *disk, int partno, } /* everything is up and running, commence */ + err = xa_insert(&disk->part_tbl, partno, bdev, GFP_KERNEL); + if (err) + goto out_del; bdev_add(bdev, devt); - rcu_assign_pointer(ptbl->part[partno], bdev); /* suppress uevent if the disk suppresses it */ if (!dev_get_uevent_suppress(ddev)) @@ -615,7 +604,7 @@ static bool blk_add_partition(struct gendisk *disk, struct block_device *bdev, int blk_add_partitions(struct gendisk *disk, struct block_device *bdev) { struct parsed_partitions *state; - int ret = -EAGAIN, p, highest; + int ret = -EAGAIN, p; if (!disk_part_scan_enabled(disk)) return 0; @@ -663,15 +652,6 @@ int blk_add_partitions(struct gendisk *disk, struct block_device *bdev) /* tell userspace that the media / partition table may have changed */ kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE); - /* - * Detect the highest partition number and preallocate disk->part_tbl. - * This is an optimization and not strictly necessary. - */ - for (p = 1, highest = 0; p < state->limit; p++) - if (state->parts[p].size) - highest = p; - disk_expand_part_tbl(disk, highest); - for (p = 1; p < state->limit; p++) if (!blk_add_partition(disk, bdev, state, p)) goto out_free_state; |