Commit 9637d517 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'for-linus-20190715' of git://git.kernel.dk/linux-block 

Pull more block updates from Jens Axboe:
 "A later pull request with some followup items. I had some vacation
  coming up to the merge window, so certain things items were delayed a
  bit. This pull request also contains fixes that came in within the
  last few days of the merge window, which I didn't want to push right
  before sending you a pull request.

  This contains:

   - NVMe pull request, mostly fixes, but also a few minor items on the
     feature side that were timing constrained (Christoph et al)

   - Report zones fixes (Damien)

   - Removal of dead code (Damien)

   - Turn on cgroup psi memstall (Josef)

   - block cgroup MAINTAINERS entry (Konstantin)

   - Flush init fix (Josef)

   - blk-throttle low iops timing fix (Konstantin)

   - nbd resize fixes (Mike)

   - nbd 0 blocksize crash fix (Xiubo)

   - block integrity error leak fix (Wenwen)

   - blk-cgroup writeback and priority inheritance fixes (Tejun)"

* tag 'for-linus-20190715' of git://git.kernel.dk/linux-block: (42 commits)
  MAINTAINERS: add entry for block io cgroup
  null_blk: fixup ->report_zones() for !CONFIG_BLK_DEV_ZONED
  block: Limit zone array allocation size
  sd_zbc: Fix report zones buffer allocation
  block: Kill gfp_t argument of blkdev_report_zones()
  block: Allow mapping of vmalloc-ed buffers
  block/bio-integrity: fix a memory leak bug
  nvme: fix NULL deref for fabrics options
  nbd: add netlink reconfigure resize support
  nbd: fix crash when the blksize is zero
  block: Disable write plugging for zoned block devices
  block: Fix elevator name declaration
  block: Remove unused definitions
  nvme: fix regression upon hot device removal and insertion
  blk-throttle: fix zero wait time for iops throttled group
  block: Fix potential overflow in blk_report_zones()
  blkcg: implement REQ_CGROUP_PUNT
  blkcg, writeback: Implement wbc_blkcg_css()
  blkcg, writeback: Add wbc->no_cgroup_owner
  blkcg, writeback: Rename wbc_account_io() to wbc_account_cgroup_owner()
  ...
parents 273cbf61 787c79d6

Documentation/admin-guide/cgroup-v2.rst

+1 −1
Original line number Diff line number Diff line
@@ -2124,7 +2124,7 @@ following two functions. 
	a queue (device) has been associated with the bio and

	before submission.



  wbc_account_io(@wbc, @page, @bytes)

  wbc_account_cgroup_owner(@wbc, @page, @bytes)

	Should be called for each data segment being written out.

	While this function doesn't care exactly when it's called

	during the writeback session, it's the easiest and most

Documentation/block/biodoc.txt

+0 −5
Original line number Diff line number Diff line
@@ -843,11 +843,6 @@ elevator_latter_req_fn These return the request before or after the 


elevator_completed_req_fn	called when a request is completed.



elevator_may_queue_fn		returns true if the scheduler wants to allow the

				current context to queue a new request even if

				it is over the queue limit. This must be used

				very carefully!!



elevator_set_req_fn

elevator_put_req_fn		Must be used to allocate and free any elevator

				specific storage for a request.

MAINTAINERS

+13 −0
Original line number Diff line number Diff line
@@ -4183,6 +4183,19 @@ S: Maintained 
F:	mm/memcontrol.c

F:	mm/swap_cgroup.c



CONTROL GROUP - BLOCK IO CONTROLLER (BLKIO)

M:	Tejun Heo <tj@kernel.org>

M:	Jens Axboe <axboe@kernel.dk>

L:	cgroups@vger.kernel.org

L:	linux-block@vger.kernel.org

T:	git git://git.kernel.dk/linux-block

F:	Documentation/cgroup-v1/blkio-controller.rst

F:	block/blk-cgroup.c

F:	include/linux/blk-cgroup.h

F:	block/blk-throttle.c

F:	block/blk-iolatency.c

F:	block/bfq-cgroup.c



CORETEMP HARDWARE MONITORING DRIVER

M:	Fenghua Yu <fenghua.yu@intel.com>

L:	linux-hwmon@vger.kernel.org

block/bio-integrity.c

+6 −2
Original line number Diff line number Diff line
@@ -276,8 +276,12 @@ bool bio_integrity_prep(struct bio *bio) 
		ret = bio_integrity_add_page(bio, virt_to_page(buf),

					     bytes, offset);



		if (ret == 0)

			return false;

		if (ret == 0) {

			printk(KERN_ERR "could not attach integrity payload\n");

			kfree(buf);

			status = BLK_STS_RESOURCE;

			goto err_end_io;

		}



		if (ret < bytes)

			break;

block/bio.c

+27 −1
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/workqueue.h>

#include <linux/cgroup.h>

#include <linux/blk-cgroup.h>

#include <linux/highmem.h>



#include <trace/events/block.h>

#include "blk.h"
@@ -1441,8 +1442,22 @@ void bio_unmap_user(struct bio *bio) 
	bio_put(bio);

}



static void bio_invalidate_vmalloc_pages(struct bio *bio)

{

#ifdef ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE

	if (bio->bi_private && !op_is_write(bio_op(bio))) {

		unsigned long i, len = 0;



		for (i = 0; i < bio->bi_vcnt; i++)

			len += bio->bi_io_vec[i].bv_len;

		invalidate_kernel_vmap_range(bio->bi_private, len);

	}

#endif

}



static void bio_map_kern_endio(struct bio *bio)

{

	bio_invalidate_vmalloc_pages(bio);

	bio_put(bio);

}
@@ -1463,6 +1478,8 @@ struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len, 
	unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;

	unsigned long start = kaddr >> PAGE_SHIFT;

	const int nr_pages = end - start;

	bool is_vmalloc = is_vmalloc_addr(data);

	struct page *page;

	int offset, i;

	struct bio *bio;
@@ -1470,6 +1487,11 @@ struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len, 
	if (!bio)

		return ERR_PTR(-ENOMEM);



	if (is_vmalloc) {

		flush_kernel_vmap_range(data, len);

		bio->bi_private = data;

	}



	offset = offset_in_page(kaddr);

	for (i = 0; i < nr_pages; i++) {

		unsigned int bytes = PAGE_SIZE - offset;
@@ -1480,7 +1502,11 @@ struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len, 
		if (bytes > len)

			bytes = len;



		if (bio_add_pc_page(q, bio, virt_to_page(data), bytes,

		if (!is_vmalloc)

			page = virt_to_page(data);

		else

			page = vmalloc_to_page(data);

		if (bio_add_pc_page(q, bio, page, bytes,

				    offset) < bytes) {

			/* we don't support partial mappings */

			bio_put(bio);

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