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for-5.7/block-2020-03-29 

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Merge tag 'for-5.7/block-2020-03-29' of git://git.kernel.dk/linux-block

Pull block updates from Jens Axboe:

 - Online capacity resizing (Balbir)

 - Number of hardware queue change fixes (Bart)

 - null_blk fault injection addition (Bart)

 - Cleanup of queue allocation, unifying the node/no-node API
   (Christoph)

 - Cleanup of genhd, moving code to where it makes sense (Christoph)

 - Cleanup of the partition handling code (Christoph)

 - disk stat fixes/improvements (Konstantin)

 - BFQ improvements (Paolo)

 - Various fixes and improvements

* tag 'for-5.7/block-2020-03-29' of git://git.kernel.dk/linux-block: (72 commits)
  block: return NULL in blk_alloc_queue() on error
  block: move bio_map_* to blk-map.c
  Revert "blkdev: check for valid request queue before issuing flush"
  block: simplify queue allocation
  bcache: pass the make_request methods to blk_queue_make_request
  null_blk: use blk_mq_init_queue_data
  block: add a blk_mq_init_queue_data helper
  block: move the ->devnode callback to struct block_device_operations
  block: move the part_stat* helpers from genhd.h to a new header
  block: move block layer internals out of include/linux/genhd.h
  block: move guard_bio_eod to bio.c
  block: unexport get_gendisk
  block: unexport disk_map_sector_rcu
  block: unexport disk_get_part
  block: mark part_in_flight and part_in_flight_rw static
  block: mark block_depr static
  block: factor out requeue handling from dispatch code
  block/diskstats: replace time_in_queue with sum of request times
  block/diskstats: accumulate all per-cpu counters in one pass
  block/diskstats: more accurate approximation of io_ticks for slow disks
  ...
This commit is contained in:
Linus Torvalds 2020-03-30 11:20:13 -07:00
parent 3a0eb192c0 654a3667df
commit 10f36b1e80
111 changed files with 1951 additions and 2040 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Documentation/admin-guide/iostats.rst
View File

@ -100,7 +100,7 @@ Field 10 -- # of milliseconds spent doing I/Os (unsigned int)
Since 5.0 this field counts jiffies when at least one request was
started or completed. If request runs more than 2 jiffies then some
I/O time will not be accounted unless there are other requests.
I/O time might be not accounted in case of concurrent requests.
Field 11 -- weighted # of milliseconds spent doing I/Os (unsigned int)
This field is incremented at each I/O start, I/O completion, I/O
@ -143,6 +143,9 @@ are summed (possibly overflowing the unsigned long variable they are
summed to) and the result given to the user. There is no convenient
user interface for accessing the per-CPU counters themselves.
Since 4.19 request times are measured with nanoseconds precision and
truncated to milliseconds before showing in this interface.
Disks vs Partitions
-------------------

16
Documentation/block/capability.rst
View File

@ -2,17 +2,9 @@
Generic Block Device Capability
===============================
This file documents the sysfs file block/<disk>/capability
This file documents the sysfs file ``block/<disk>/capability``.
capability is a hex word indicating which capabilities a specific disk
supports. For more information on bits not listed here, see
include/linux/genhd.h
``capability`` is a bitfield, printed in hexadecimal, indicating which
capabilities a specific block device supports:
GENHD_FL_MEDIA_CHANGE_NOTIFY
----------------------------
Value: 4
When this bit is set, the disk supports Asynchronous Notification
of media change events. These events will be broadcast to user
space via kernel uevent.
.. kernel-doc:: include/linux/genhd.h

21
Documentation/scsi/scsi_mid_low_api.txt
View File

@ -299,7 +299,6 @@ Summary:
scsi_host_alloc - return a new scsi_host instance whose refcount==1
scsi_host_get - increments Scsi_Host instance's refcount
scsi_host_put - decrements Scsi_Host instance's refcount (free if 0)
scsi_partsize - parse partition table into cylinders, heads + sectors
scsi_register - create and register a scsi host adapter instance.
scsi_remove_device - detach and remove a SCSI device
scsi_remove_host - detach and remove all SCSI devices owned by host
@ -472,26 +471,6 @@ void scsi_host_get(struct Scsi_Host *shost)
void scsi_host_put(struct Scsi_Host *shost)
/**
* scsi_partsize - parse partition table into cylinders, heads + sectors
* @buf: pointer to partition table
* @capacity: size of (total) disk in 512 byte sectors
* @cyls: outputs number of cylinders calculated via this pointer
* @hds: outputs number of heads calculated via this pointer
* @secs: outputs number of sectors calculated via this pointer
*
* Returns 0 on success, -1 on failure
*
* Might block: no
*
* Notes: Caller owns memory returned (free with kfree() )
*
* Defined in: drivers/scsi/scsicam.c
**/
int scsi_partsize(unsigned char *buf, unsigned long capacity,
unsigned int *cyls, unsigned int *hds, unsigned int *secs)
/**
* scsi_register - create and register a scsi host adapter instance.
* @sht: pointer to scsi host template

3
arch/m68k/emu/nfblock.c
View File

@ -118,12 +118,11 @@ static int __init nfhd_init_one(int id, u32 blocks, u32 bsize)
dev->bsize = bsize;
dev->bshift = ffs(bsize) - 10;
dev->queue = blk_alloc_queue(GFP_KERNEL);
dev->queue = blk_alloc_queue(nfhd_make_request, NUMA_NO_NODE);
if (dev->queue == NULL)
goto free_dev;
dev->queue->queuedata = dev;
blk_queue_make_request(dev->queue, nfhd_make_request);
blk_queue_logical_block_size(dev->queue, bsize);
dev->disk = alloc_disk(16);

3
arch/xtensa/platforms/iss/simdisk.c
View File

@ -267,13 +267,12 @@ static int __init simdisk_setup(struct simdisk *dev, int which,
spin_lock_init(&dev->lock);
dev->users = 0;
dev->queue = blk_alloc_queue(GFP_KERNEL);
dev->queue = blk_alloc_queue(simdisk_make_request, NUMA_NO_NODE);
if (dev->queue == NULL) {
pr_err("blk_alloc_queue failed\n");
goto out_alloc_queue;
}
blk_queue_make_request(dev->queue, simdisk_make_request);
dev->queue->queuedata = dev;
dev->gd = alloc_disk(SIMDISK_MINORS);

3
block/Makefile
View File

@ -8,8 +8,7 @@ obj-$(CONFIG_BLOCK) := bio.o elevator.o blk-core.o blk-sysfs.o \
blk-exec.o blk-merge.o blk-softirq.o blk-timeout.o \
blk-lib.o blk-mq.o blk-mq-tag.o blk-stat.o \
blk-mq-sysfs.o blk-mq-cpumap.o blk-mq-sched.o ioctl.o \
genhd.o partition-generic.o ioprio.o \
badblocks.o partitions/ blk-rq-qos.o
genhd.o ioprio.o badblocks.o partitions/ blk-rq-qos.o
obj-$(CONFIG_BOUNCE) += bounce.o
obj-$(CONFIG_BLK_SCSI_REQUEST) += scsi_ioctl.o

87
block/bfq-cgroup.c
View File

@ -642,6 +642,12 @@ void bfq_bfqq_move(struct bfq_data *bfqd, struct bfq_queue *bfqq,
{
struct bfq_entity *entity = &bfqq->entity;
/*
* Get extra reference to prevent bfqq from being freed in
* next possible expire or deactivate.
*/
bfqq->ref++;
/* If bfqq is empty, then bfq_bfqq_expire also invokes
* bfq_del_bfqq_busy, thereby removing bfqq and its entity
* from data structures related to current group. Otherwise we
@ -652,12 +658,6 @@ void bfq_bfqq_move(struct bfq_data *bfqd, struct bfq_queue *bfqq,
bfq_bfqq_expire(bfqd, bfqd->in_service_queue,
false, BFQQE_PREEMPTED);
/*
* get extra reference to prevent bfqq from being freed in
* next possible deactivate
*/
bfqq->ref++;
if (bfq_bfqq_busy(bfqq))
bfq_deactivate_bfqq(bfqd, bfqq, false, false);
else if (entity->on_st_or_in_serv)
@ -677,7 +677,7 @@ void bfq_bfqq_move(struct bfq_data *bfqd, struct bfq_queue *bfqq,
if (!bfqd->in_service_queue && !bfqd->rq_in_driver)
bfq_schedule_dispatch(bfqd);
/* release extra ref taken above */
/* release extra ref taken above, bfqq may happen to be freed now */
bfq_put_queue(bfqq);
}
@ -714,10 +714,7 @@ static struct bfq_group *__bfq_bic_change_cgroup(struct bfq_data *bfqd,
if (entity->sched_data != &bfqg->sched_data) {
bic_set_bfqq(bic, NULL, 0);
bfq_log_bfqq(bfqd, async_bfqq,
"bic_change_group: %p %d",
async_bfqq, async_bfqq->ref);
bfq_put_queue(async_bfqq);
bfq_release_process_ref(bfqd, async_bfqq);
}
}
@ -818,39 +815,53 @@ static void bfq_flush_idle_tree(struct bfq_service_tree *st)
/**
* bfq_reparent_leaf_entity - move leaf entity to the root_group.
* @bfqd: the device data structure with the root group.
* @entity: the entity to move.
* @entity: the entity to move, if entity is a leaf; or the parent entity
* of an active leaf entity to move, if entity is not a leaf.
*/
static void bfq_reparent_leaf_entity(struct bfq_data *bfqd,
struct bfq_entity *entity)
struct bfq_entity *entity,
int ioprio_class)
{
struct bfq_queue *bfqq = bfq_entity_to_bfqq(entity);
struct bfq_queue *bfqq;
struct bfq_entity *child_entity = entity;
while (child_entity->my_sched_data) { /* leaf not reached yet */
struct bfq_sched_data *child_sd = child_entity->my_sched_data;
struct bfq_service_tree *child_st = child_sd->service_tree +
ioprio_class;
struct rb_root *child_active = &child_st->active;
child_entity = bfq_entity_of(rb_first(child_active));
if (!child_entity)
child_entity = child_sd->in_service_entity;
}
bfqq = bfq_entity_to_bfqq(child_entity);
bfq_bfqq_move(bfqd, bfqq, bfqd->root_group);
}
/**
* bfq_reparent_active_entities - move to the root group all active
* entities.
* bfq_reparent_active_queues - move to the root group all active queues.
* @bfqd: the device data structure with the root group.
* @bfqg: the group to move from.
* @st: the service tree with the entities.
* @st: the service tree to start the search from.
*/
static void bfq_reparent_active_entities(struct bfq_data *bfqd,
struct bfq_group *bfqg,
struct bfq_service_tree *st)
static void bfq_reparent_active_queues(struct bfq_data *bfqd,
struct bfq_group *bfqg,
struct bfq_service_tree *st,
int ioprio_class)
{
struct rb_root *active = &st->active;
struct bfq_entity *entity = NULL;
struct bfq_entity *entity;
if (!RB_EMPTY_ROOT(&st->active))
entity = bfq_entity_of(rb_first(active));
for (; entity ; entity = bfq_entity_of(rb_first(active)))
bfq_reparent_leaf_entity(bfqd, entity);
while ((entity = bfq_entity_of(rb_first(active))))
bfq_reparent_leaf_entity(bfqd, entity, ioprio_class);
if (bfqg->sched_data.in_service_entity)
bfq_reparent_leaf_entity(bfqd,
bfqg->sched_data.in_service_entity);
bfqg->sched_data.in_service_entity,
ioprio_class);
}
/**
@ -882,13 +893,6 @@ static void bfq_pd_offline(struct blkg_policy_data *pd)
for (i = 0; i < BFQ_IOPRIO_CLASSES; i++) {
st = bfqg->sched_data.service_tree + i;
/*
* The idle tree may still contain bfq_queues belonging
* to exited task because they never migrated to a different
* cgroup from the one being destroyed now.
*/
bfq_flush_idle_tree(st);
/*
* It may happen that some queues are still active
* (busy) upon group destruction (if the corresponding
@ -901,7 +905,20 @@ static void bfq_pd_offline(struct blkg_policy_data *pd)
* There is no need to put the sync queues, as the
* scheduler has taken no reference.
*/
bfq_reparent_active_entities(bfqd, bfqg, st);
bfq_reparent_active_queues(bfqd, bfqg, st, i);
/*
* The idle tree may still contain bfq_queues
* belonging to exited task because they never
* migrated to a different cgroup from the one being
* destroyed now. In addition, even
* bfq_reparent_active_queues() may happen to add some
* entities to the idle tree. It happens if, in some
* of the calls to bfq_bfqq_move() performed by
* bfq_reparent_active_queues(), the queue to move is
* empty and gets expired.
*/
bfq_flush_idle_tree(st);
}
__bfq_deactivate_entity(entity, false);

18
block/bfq-iosched.c
View File

@ -2716,8 +2716,6 @@ static void bfq_bfqq_save_state(struct bfq_queue *bfqq)
}
}
static
void bfq_release_process_ref(struct bfq_data *bfqd, struct bfq_queue *bfqq)
{
/*
@ -6215,20 +6213,28 @@ static struct bfq_queue *bfq_init_rq(struct request *rq)
return bfqq;
}
static void bfq_idle_slice_timer_body(struct bfq_queue *bfqq)
static void
bfq_idle_slice_timer_body(struct bfq_data *bfqd, struct bfq_queue *bfqq)
{
struct bfq_data *bfqd = bfqq->bfqd;
enum bfqq_expiration reason;
unsigned long flags;
spin_lock_irqsave(&bfqd->lock, flags);
bfq_clear_bfqq_wait_request(bfqq);
/*
* Considering that bfqq may be in race, we should firstly check
* whether bfqq is in service before doing something on it. If
* the bfqq in race is not in service, it has already been expired
* through __bfq_bfqq_expire func and its wait_request flags has
* been cleared in __bfq_bfqd_reset_in_service func.
*/
if (bfqq != bfqd->in_service_queue) {
spin_unlock_irqrestore(&bfqd->lock, flags);
return;
}
bfq_clear_bfqq_wait_request(bfqq);
if (bfq_bfqq_budget_timeout(bfqq))
/*
* Also here the queue can be safely expired
@ -6273,7 +6279,7 @@ static enum hrtimer_restart bfq_idle_slice_timer(struct hrtimer *timer)
* early.
*/
if (bfqq)
bfq_idle_slice_timer_body(bfqq);
bfq_idle_slice_timer_body(bfqd, bfqq);
return HRTIMER_NORESTART;
}

1
block/bfq-iosched.h
View File

@ -955,6 +955,7 @@ void bfq_bfqq_expire(struct bfq_data *bfqd, struct bfq_queue *bfqq,
bool compensate, enum bfqq_expiration reason);
void bfq_put_queue(struct bfq_queue *bfqq);
void bfq_end_wr_async_queues(struct bfq_data *bfqd, struct bfq_group *bfqg);
void bfq_release_process_ref(struct bfq_data *bfqd, struct bfq_queue *bfqq);
void bfq_schedule_dispatch(struct bfq_data *bfqd);
void bfq_put_async_queues(struct bfq_data *bfqd, struct bfq_group *bfqg);

580
block/bio.c
View File

@ -17,6 +17,7 @@
#include <linux/cgroup.h>
#include <linux/blk-cgroup.h>
#include <linux/highmem.h>
#include <linux/sched/sysctl.h>
#include <trace/events/block.h>
#include "blk.h"
@ -587,6 +588,49 @@ void bio_truncate(struct bio *bio, unsigned new_size)
bio->bi_iter.bi_size = new_size;
}
/**
* guard_bio_eod - truncate a BIO to fit the block device
* @bio: bio to truncate
*
* This allows us to do IO even on the odd last sectors of a device, even if the
* block size is some multiple of the physical sector size.
*
* We'll just truncate the bio to the size of the device, and clear the end of
* the buffer head manually. Truly out-of-range accesses will turn into actual
* I/O errors, this only handles the "we need to be able to do I/O at the final
* sector" case.
*/
void guard_bio_eod(struct bio *bio)
{
sector_t maxsector;
struct hd_struct *part;
rcu_read_lock();
part = __disk_get_part(bio->bi_disk, bio->bi_partno);
if (part)
maxsector = part_nr_sects_read(part);
else
maxsector = get_capacity(bio->bi_disk);
rcu_read_unlock();
if (!maxsector)
return;
/*
* If the *whole* IO is past the end of the device,
* let it through, and the IO layer will turn it into
* an EIO.
*/
if (unlikely(bio->bi_iter.bi_sector >= maxsector))
return;
maxsector -= bio->bi_iter.bi_sector;
if (likely((bio->bi_iter.bi_size >> 9) <= maxsector))
return;
bio_truncate(bio, maxsector << 9);
}
/**
* bio_put - release a reference to a bio
* @bio: bio to release reference to
@ -679,6 +723,12 @@ struct bio *bio_clone_fast(struct bio *bio, gfp_t gfp_mask, struct bio_set *bs)
}
EXPORT_SYMBOL(bio_clone_fast);
const char *bio_devname(struct bio *bio, char *buf)
{
return disk_name(bio->bi_disk, bio->bi_partno, buf);
}
EXPORT_SYMBOL(bio_devname);
static inline bool page_is_mergeable(const struct bio_vec *bv,
struct page *page, unsigned int len, unsigned int off,
bool *same_page)
@ -730,7 +780,7 @@ static bool bio_try_merge_pc_page(struct request_queue *q, struct bio *bio,
*
* This should only be used by passthrough bios.
*/
static int __bio_add_pc_page(struct request_queue *q, struct bio *bio,
int __bio_add_pc_page(struct request_queue *q, struct bio *bio,
struct page *page, unsigned int len, unsigned int offset,
bool *same_page)
{
@ -1019,12 +1069,21 @@ static void submit_bio_wait_endio(struct bio *bio)
int submit_bio_wait(struct bio *bio)
{
DECLARE_COMPLETION_ONSTACK_MAP(done, bio->bi_disk->lockdep_map);
unsigned long hang_check;
bio->bi_private = &done;
bio->bi_end_io = submit_bio_wait_endio;
bio->bi_opf |= REQ_SYNC;
submit_bio(bio);
wait_for_completion_io(&done);
/* Prevent hang_check timer from firing at us during very long I/O */
hang_check = sysctl_hung_task_timeout_secs;
if (hang_check)
while (!wait_for_completion_io_timeout(&done,
hang_check * (HZ/2)))
;
else
wait_for_completion_io(&done);
return blk_status_to_errno(bio->bi_status);
}
@ -1135,90 +1194,6 @@ void bio_list_copy_data(struct bio *dst, struct bio *src)
}
EXPORT_SYMBOL(bio_list_copy_data);
struct bio_map_data {
int is_our_pages;
struct iov_iter iter;
struct iovec iov[];
};
static struct bio_map_data *bio_alloc_map_data(struct iov_iter *data,
gfp_t gfp_mask)
{
struct bio_map_data *bmd;
if (data->nr_segs > UIO_MAXIOV)
return NULL;
bmd = kmalloc(struct_size(bmd, iov, data->nr_segs), gfp_mask);
if (!bmd)
return NULL;
memcpy(bmd->iov, data->iov, sizeof(struct iovec) * data->nr_segs);
bmd->iter = *data;
bmd->iter.iov = bmd->iov;
return bmd;
}
/**
* bio_copy_from_iter - copy all pages from iov_iter to bio
* @bio: The &struct bio which describes the I/O as destination
* @iter: iov_iter as source
*
* Copy all pages from iov_iter to bio.
* Returns 0 on success, or error on failure.
*/
static int bio_copy_from_iter(struct bio *bio, struct iov_iter *iter)
{
struct bio_vec *bvec;
struct bvec_iter_all iter_all;
bio_for_each_segment_all(bvec, bio, iter_all) {
ssize_t ret;
ret = copy_page_from_iter(bvec->bv_page,
bvec->bv_offset,
bvec->bv_len,
iter);
if (!iov_iter_count(iter))
break;
if (ret < bvec->bv_len)
return -EFAULT;
}
return 0;
}
/**
* bio_copy_to_iter - copy all pages from bio to iov_iter
* @bio: The &struct bio which describes the I/O as source
* @iter: iov_iter as destination
*
* Copy all pages from bio to iov_iter.
* Returns 0 on success, or error on failure.
*/
static int bio_copy_to_iter(struct bio *bio, struct iov_iter iter)
{
struct bio_vec *bvec;
struct bvec_iter_all iter_all;
bio_for_each_segment_all(bvec, bio, iter_all) {
ssize_t ret;
ret = copy_page_to_iter(bvec->bv_page,
bvec->bv_offset,
bvec->bv_len,
&iter);
if (!iov_iter_count(&iter))
break;
if (ret < bvec->bv_len)
return -EFAULT;
}
return 0;
}
void bio_free_pages(struct bio *bio)
{
struct bio_vec *bvec;
@ -1229,430 +1204,6 @@ void bio_free_pages(struct bio *bio)
}
EXPORT_SYMBOL(bio_free_pages);
/**
* bio_uncopy_user - finish previously mapped bio
* @bio: bio being terminated
*
* Free pages allocated from bio_copy_user_iov() and write back data
* to user space in case of a read.
*/
int bio_uncopy_user(struct bio *bio)
{
struct bio_map_data *bmd = bio->bi_private;
int ret = 0;
if (!bio_flagged(bio, BIO_NULL_MAPPED)) {
/*
* if we're in a workqueue, the request is orphaned, so
* don't copy into a random user address space, just free
* and return -EINTR so user space doesn't expect any data.
*/
if (!current->mm)
ret = -EINTR;
else if (bio_data_dir(bio) == READ)
ret = bio_copy_to_iter(bio, bmd->iter);
if (bmd->is_our_pages)
bio_free_pages(bio);
}
kfree(bmd);
bio_put(bio);
return ret;
}
/**
* bio_copy_user_iov - copy user data to bio
* @q: destination block queue
* @map_data: pointer to the rq_map_data holding pages (if necessary)
* @iter: iovec iterator
* @gfp_mask: memory allocation flags
*
* Prepares and returns a bio for indirect user io, bouncing data
* to/from kernel pages as necessary. Must be paired with
* call bio_uncopy_user() on io completion.
*/
struct bio *bio_copy_user_iov(struct request_queue *q,
struct rq_map_data *map_data,
struct iov_iter *iter,
gfp_t gfp_mask)
{
struct bio_map_data *bmd;
struct page *page;
struct bio *bio;
int i = 0, ret;
int nr_pages;
unsigned int len = iter->count;
unsigned int offset = map_data ? offset_in_page(map_data->offset) : 0;
bmd = bio_alloc_map_data(iter, gfp_mask);
if (!bmd)
return ERR_PTR(-ENOMEM);
/*
* We need to do a deep copy of the iov_iter including the iovecs.
* The caller provided iov might point to an on-stack or otherwise
* shortlived one.
*/
bmd->is_our_pages = map_data ? 0 : 1;
nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE);
if (nr_pages > BIO_MAX_PAGES)
nr_pages = BIO_MAX_PAGES;
ret = -ENOMEM;
bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
goto out_bmd;
ret = 0;
if (map_data) {
nr_pages = 1 << map_data->page_order;
i = map_data->offset / PAGE_SIZE;
}
while (len) {
unsigned int bytes = PAGE_SIZE;
bytes -= offset;
if (bytes > len)
bytes = len;
if (map_data) {
if (i == map_data->nr_entries * nr_pages) {
ret = -ENOMEM;
break;
}
page = map_data->pages[i / nr_pages];
page += (i % nr_pages);
i++;
} else {
page = alloc_page(q->bounce_gfp | gfp_mask);
if (!page) {
ret = -ENOMEM;
break;
}
}
if (bio_add_pc_page(q, bio, page, bytes, offset) < bytes) {
if (!map_data)
__free_page(page);
break;
}
len -= bytes;
offset = 0;
}
if (ret)
goto cleanup;
if (map_data)
map_data->offset += bio->bi_iter.bi_size;
/*
* success
*/
if ((iov_iter_rw(iter) == WRITE && (!map_data || !map_data->null_mapped)) ||
(map_data && map_data->from_user)) {
ret = bio_copy_from_iter(bio, iter);
if (ret)
goto cleanup;
} else {
if (bmd->is_our_pages)
zero_fill_bio(bio);
iov_iter_advance(iter, bio->bi_iter.bi_size);
}
bio->bi_private = bmd;
if (map_data && map_data->null_mapped)
bio_set_flag(bio, BIO_NULL_MAPPED);
return bio;
cleanup:
if (!map_data)
bio_free_pages(bio);
bio_put(bio);
out_bmd:
kfree(bmd);
return ERR_PTR(ret);
}
/**
* bio_map_user_iov - map user iovec into bio
* @q: the struct request_queue for the bio
* @iter: iovec iterator
* @gfp_mask: memory allocation flags
*
* Map the user space address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
struct bio *bio_map_user_iov(struct request_queue *q,
struct iov_iter *iter,
gfp_t gfp_mask)
{
int j;
struct bio *bio;
int ret;
if (!iov_iter_count(iter))
return ERR_PTR(-EINVAL);
bio = bio_kmalloc(gfp_mask, iov_iter_npages(iter, BIO_MAX_PAGES));
if (!bio)
return ERR_PTR(-ENOMEM);
while (iov_iter_count(iter)) {
struct page **pages;
ssize_t bytes;
size_t offs, added = 0;
int npages;
bytes = iov_iter_get_pages_alloc(iter, &pages, LONG_MAX, &offs);
if (unlikely(bytes <= 0)) {
ret = bytes ? bytes : -EFAULT;
goto out_unmap;
}
npages = DIV_ROUND_UP(offs + bytes, PAGE_SIZE);
if (unlikely(offs & queue_dma_alignment(q))) {
ret = -EINVAL;
j = 0;
} else {
for (j = 0; j < npages; j++) {
struct page *page = pages[j];
unsigned int n = PAGE_SIZE - offs;
bool same_page = false;
if (n > bytes)
n = bytes;
if (!__bio_add_pc_page(q, bio, page, n, offs,
&same_page)) {
if (same_page)
put_page(page);
break;
}
added += n;
bytes -= n;
offs = 0;
}
iov_iter_advance(iter, added);
}
/*
* release the pages we didn't map into the bio, if any
*/
while (j < npages)
put_page(pages[j++]);
kvfree(pages);
/* couldn't stuff something into bio? */
if (bytes)
break;
}
bio_set_flag(bio, BIO_USER_MAPPED);
/*
* subtle -- if bio_map_user_iov() ended up bouncing a bio,
* it would normally disappear when its bi_end_io is run.
* however, we need it for the unmap, so grab an extra
* reference to it
*/
bio_get(bio);
return bio;
out_unmap:
bio_release_pages(bio, false);
bio_put(bio);
return ERR_PTR(ret);
}
/**
* bio_unmap_user - unmap a bio
* @bio: the bio being unmapped
*
* Unmap a bio previously mapped by bio_map_user_iov(). Must be called from
* process context.
*
* bio_unmap_user() may sleep.
*/
void bio_unmap_user(struct bio *bio)
{
bio_release_pages(bio, bio_data_dir(bio) == READ);
bio_put(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);
}
/**
* bio_map_kern - map kernel address into bio
* @q: the struct request_queue for the bio
* @data: pointer to buffer to map
* @len: length in bytes
* @gfp_mask: allocation flags for bio allocation
*
* Map the kernel address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len,
gfp_t gfp_mask)
{
unsigned long kaddr = (unsigned long)data;
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;
bio = bio_kmalloc(gfp_mask, nr_pages);
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;
if (len <= 0)
break;
if (bytes > len)
bytes = len;
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);
return ERR_PTR(-EINVAL);
}
data += bytes;
len -= bytes;
offset = 0;
}
bio->bi_end_io = bio_map_kern_endio;
return bio;
}
static void bio_copy_kern_endio(struct bio *bio)
{
bio_free_pages(bio);
bio_put(bio);
}
static void bio_copy_kern_endio_read(struct bio *bio)
{
char *p = bio->bi_private;
struct bio_vec *bvec;
struct bvec_iter_all iter_all;
bio_for_each_segment_all(bvec, bio, iter_all) {
memcpy(p, page_address(bvec->bv_page), bvec->bv_len);
p += bvec->bv_len;
}
bio_copy_kern_endio(bio);
}
/**
* bio_copy_kern - copy kernel address into bio
* @q: the struct request_queue for the bio
* @data: pointer to buffer to copy
* @len: length in bytes
* @gfp_mask: allocation flags for bio and page allocation
* @reading: data direction is READ
*
* copy the kernel address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
struct bio *bio_copy_kern(struct request_queue *q, void *data, unsigned int len,
gfp_t gfp_mask, int reading)
{
unsigned long kaddr = (unsigned long)data;
unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned long start = kaddr >> PAGE_SHIFT;
struct bio *bio;
void *p = data;
int nr_pages = 0;
/*
* Overflow, abort
*/
if (end < start)
return ERR_PTR(-EINVAL);
nr_pages = end - start;
bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
return ERR_PTR(-ENOMEM);
while (len) {
struct page *page;
unsigned int bytes = PAGE_SIZE;
if (bytes > len)
bytes = len;
page = alloc_page(q->bounce_gfp | gfp_mask);
if (!page)
goto cleanup;
if (!reading)
memcpy(page_address(page), p, bytes);
if (bio_add_pc_page(q, bio, page, bytes, 0) < bytes)
break;
len -= bytes;
p += bytes;
}
if (reading) {
bio->bi_end_io = bio_copy_kern_endio_read;
bio->bi_private = data;
} else {
bio->bi_end_io = bio_copy_kern_endio;
}
return bio;
cleanup:
bio_free_pages(bio);
bio_put(bio);
return ERR_PTR(-ENOMEM);
}
/*
* bio_set_pages_dirty() and bio_check_pages_dirty() are support functions
* for performing direct-IO in BIOs.
@ -1752,14 +1303,14 @@ defer:
schedule_work(&bio_dirty_work);
}
void update_io_ticks(struct hd_struct *part, unsigned long now)
void update_io_ticks(struct hd_struct *part, unsigned long now, bool end)
{
unsigned long stamp;
again:
stamp = READ_ONCE(part->stamp);
if (unlikely(stamp != now)) {
if (likely(cmpxchg(&part->stamp, stamp, now) == stamp)) {
__part_stat_add(part, io_ticks, 1);
__part_stat_add(part, io_ticks, end ? now - stamp : 1);
}
}
if (part->partno) {
@ -1775,7 +1326,7 @@ void generic_start_io_acct(struct request_queue *q, int op,
part_stat_lock();
update_io_ticks(part, jiffies);
update_io_ticks(part, jiffies, false);
part_stat_inc(part, ios[sgrp]);
part_stat_add(part, sectors[sgrp], sectors);
part_inc_in_flight(q, part, op_is_write(op));
@ -1793,9 +1344,8 @@ void generic_end_io_acct(struct request_queue *q, int req_op,
part_stat_lock();
update_io_ticks(part, now);
update_io_ticks(part, now, true);
part_stat_add(part, nsecs[sgrp], jiffies_to_nsecs(duration));
part_stat_add(part, time_in_queue, duration);
part_dec_in_flight(q, part, op_is_write(req_op));
part_stat_unlock();

2
block/blk-cgroup.c
View File

@ -1010,7 +1010,7 @@ unlock:
* blkcg_init_queue - initialize blkcg part of request queue
* @q: request_queue to initialize
*
* Called from blk_alloc_queue_node(). Responsible for initializing blkcg
* Called from __blk_alloc_queue(). Responsible for initializing blkcg
* part of new request_queue @q.
*
* RETURNS:

82
block/blk-core.c
View File

@ -346,7 +346,6 @@ void blk_cleanup_queue(struct request_queue *q)
blk_queue_flag_set(QUEUE_FLAG_NOMERGES, q);
blk_queue_flag_set(QUEUE_FLAG_NOXMERGES, q);
blk_queue_flag_set(QUEUE_FLAG_DYING, q);
/*
* Drain all requests queued before DYING marking. Set DEAD flag to
@ -389,12 +388,6 @@ void blk_cleanup_queue(struct request_queue *q)
}
EXPORT_SYMBOL(blk_cleanup_queue);
struct request_queue *blk_alloc_queue(gfp_t gfp_mask)
{
return blk_alloc_queue_node(gfp_mask, NUMA_NO_NODE);
}
EXPORT_SYMBOL(blk_alloc_queue);
/**
* blk_queue_enter() - try to increase q->q_usage_counter
* @q: request queue pointer
@ -471,24 +464,19 @@ static void blk_timeout_work(struct work_struct *work)
{
}
/**
* blk_alloc_queue_node - allocate a request queue
* @gfp_mask: memory allocation flags
* @node_id: NUMA node to allocate memory from
*/
struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
struct request_queue *__blk_alloc_queue(int node_id)
{
struct request_queue *q;
int ret;
q = kmem_cache_alloc_node(blk_requestq_cachep,
gfp_mask | __GFP_ZERO, node_id);
GFP_KERNEL | __GFP_ZERO, node_id);
if (!q)
return NULL;
q->last_merge = NULL;
q->id = ida_simple_get(&blk_queue_ida, 0, 0, gfp_mask);
q->id = ida_simple_get(&blk_queue_ida, 0, 0, GFP_KERNEL);
if (q->id < 0)
goto fail_q;
@ -496,7 +484,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
if (ret)
goto fail_id;
q->backing_dev_info = bdi_alloc_node(gfp_mask, node_id);
q->backing_dev_info = bdi_alloc_node(GFP_KERNEL, node_id);
if (!q->backing_dev_info)
goto fail_split;
@ -542,6 +530,9 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
if (blkcg_init_queue(q))
goto fail_ref;
blk_queue_dma_alignment(q, 511);
blk_set_default_limits(&q->limits);
return q;
fail_ref:
@ -558,7 +549,22 @@ fail_q:
kmem_cache_free(blk_requestq_cachep, q);
return NULL;
}
EXPORT_SYMBOL(blk_alloc_queue_node);
struct request_queue *blk_alloc_queue(make_request_fn make_request, int node_id)
{
struct request_queue *q;
if (WARN_ON_ONCE(!make_request))
return NULL;
q = __blk_alloc_queue(node_id);
if (!q)
return NULL;
q->make_request_fn = make_request;
q->nr_requests = BLKDEV_MAX_RQ;
return q;
}
EXPORT_SYMBOL(blk_alloc_queue);
bool blk_get_queue(struct request_queue *q)
{
@ -1121,10 +1127,9 @@ blk_qc_t direct_make_request(struct bio *bio)
if (unlikely(blk_queue_enter(q, nowait ? BLK_MQ_REQ_NOWAIT : 0))) {
if (nowait && !blk_queue_dying(q))
bio->bi_status = BLK_STS_AGAIN;
bio_wouldblock_error(bio);
else
bio->bi_status = BLK_STS_IOERR;
bio_endio(bio);
bio_io_error(bio);
return BLK_QC_T_NONE;
}
@ -1203,7 +1208,7 @@ EXPORT_SYMBOL(submit_bio);
/**
* blk_cloned_rq_check_limits - Helper function to check a cloned request
* for new the queue limits
* for the new queue limits
* @q: the queue
* @rq: the request being checked
*
@ -1339,10 +1344,9 @@ void blk_account_io_done(struct request *req, u64 now)
part_stat_lock();
part = req->part;
update_io_ticks(part, jiffies);
update_io_ticks(part, jiffies, true);
part_stat_inc(part, ios[sgrp]);
part_stat_add(part, nsecs[sgrp], now - req->start_time_ns);
part_stat_add(part, time_in_queue, nsecs_to_jiffies64(now - req->start_time_ns));
part_dec_in_flight(req->q, part, rq_data_dir(req));
hd_struct_put(part);
@ -1381,7 +1385,7 @@ void blk_account_io_start(struct request *rq, bool new_io)
rq->part = part;
}
update_io_ticks(part, jiffies);
update_io_ticks(part, jiffies, false);
part_stat_unlock();
}
@ -1583,23 +1587,6 @@ void blk_rq_unprep_clone(struct request *rq)
}
EXPORT_SYMBOL_GPL(blk_rq_unprep_clone);
/*
* Copy attributes of the original request to the clone request.
* The actual data parts (e.g. ->cmd, ->sense) are not copied.
*/
static void __blk_rq_prep_clone(struct request *dst, struct request *src)
{
dst->__sector = blk_rq_pos(src);
dst->__data_len = blk_rq_bytes(src);
if (src->rq_flags & RQF_SPECIAL_PAYLOAD) {
dst->rq_flags |= RQF_SPECIAL_PAYLOAD;
dst->special_vec = src->special_vec;
}
dst->nr_phys_segments = src->nr_phys_segments;
dst->ioprio = src->ioprio;
dst->extra_len = src->extra_len;
}
/**
* blk_rq_prep_clone - Helper function to setup clone request
* @rq: the request to be setup
@ -1612,8 +1599,6 @@ static void __blk_rq_prep_clone(struct request *dst, struct request *src)
*
* Description:
* Clones bios in @rq_src to @rq, and copies attributes of @rq_src to @rq.
* The actual data parts of @rq_src (e.g. ->cmd, ->sense)
* are not copied, and copying such parts is the caller's responsibility.
* Also, pages which the original bios are pointing to are not copied
* and the cloned bios just point same pages.
* So cloned bios must be completed before original bios, which means
@ -1644,7 +1629,16 @@ int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
rq->bio = rq->biotail = bio;
}
__blk_rq_prep_clone(rq, rq_src);
/* Copy attributes of the original request to the clone request. */
rq->__sector = blk_rq_pos(rq_src);
rq->__data_len = blk_rq_bytes(rq_src);
if (rq_src->rq_flags & RQF_SPECIAL_PAYLOAD) {
rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
rq->special_vec = rq_src->special_vec;
}
rq->nr_phys_segments = rq_src->nr_phys_segments;
rq->ioprio = rq_src->ioprio;
rq->extra_len = rq_src->extra_len;
return 0;

16
block/blk-flush.c
View File

@ -160,9 +160,6 @@ static void blk_account_io_flush(struct request *rq)
*
* CONTEXT:
* spin_lock_irq(fq->mq_flush_lock)
*
* RETURNS:
* %true if requests were added to the dispatch queue, %false otherwise.
*/
static void blk_flush_complete_seq(struct request *rq,
struct blk_flush_queue *fq,
@ -457,15 +454,6 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
if (!q)
return -ENXIO;
/*
* some block devices may not have their queue correctly set up here
* (e.g. loop device without a backing file) and so issuing a flush
* here will panic. Ensure there is a request function before issuing
* the flush.
*/
if (!q->make_request_fn)
return -ENXIO;
bio = bio_alloc(gfp_mask, 0);
bio_set_dev(bio, bdev);
bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
@ -485,8 +473,8 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
}
EXPORT_SYMBOL(blkdev_issue_flush);
struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
int node, int cmd_size, gfp_t flags)
struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size,
gfp_t flags)
{
struct blk_flush_queue *fq;
int rq_sz = sizeof(struct request);

7
block/blk-ioc.c
View File

@ -84,6 +84,7 @@ static void ioc_destroy_icq(struct io_cq *icq)
* making it impossible to determine icq_cache. Record it in @icq.
*/
icq->__rcu_icq_cache = et->icq_cache;
icq->flags |= ICQ_DESTROYED;
call_rcu(&icq->__rcu_head, icq_free_icq_rcu);
}
@ -212,15 +213,21 @@ static void __ioc_clear_queue(struct list_head *icq_list)
{
unsigned long flags;
rcu_read_lock();
while (!list_empty(icq_list)) {
struct io_cq *icq = list_entry(icq_list->next,
struct io_cq, q_node);
struct io_context *ioc = icq->ioc;
spin_lock_irqsave(&ioc->lock, flags);
if (icq->flags & ICQ_DESTROYED) {
spin_unlock_irqrestore(&ioc->lock, flags);
continue;
}
ioc_destroy_icq(icq);
spin_unlock_irqrestore(&ioc->lock, flags);
}
rcu_read_unlock();
}
/**

3
block/blk-iocost.c
View File

@ -46,9 +46,6 @@
* If needed, tools/cgroup/iocost_coef_gen.py can be used to generate
* device-specific coefficients.
*
* If needed, tools/cgroup/iocost_coef_gen.py can be used to generate
* device-specific coefficients.
*
* 2. Control Strategy
*
* The device virtual time (vtime) is used as the primary control metric.

508
block/blk-map.c
View File

@ -11,6 +11,514 @@
#include "blk.h"
struct bio_map_data {
int is_our_pages;
struct iov_iter iter;
struct iovec iov[];
};
static struct bio_map_data *bio_alloc_map_data(struct iov_iter *data,
gfp_t gfp_mask)
{
struct bio_map_data *bmd;
if (data->nr_segs > UIO_MAXIOV)
return NULL;
bmd = kmalloc(struct_size(bmd, iov, data->nr_segs), gfp_mask);
if (!bmd)
return NULL;
memcpy(bmd->iov, data->iov, sizeof(struct iovec) * data->nr_segs);
bmd->iter = *data;
bmd->iter.iov = bmd->iov;
return bmd;
}
/**
* bio_copy_from_iter - copy all pages from iov_iter to bio
* @bio: The &struct bio which describes the I/O as destination
* @iter: iov_iter as source
*
* Copy all pages from iov_iter to bio.
* Returns 0 on success, or error on failure.
*/
static int bio_copy_from_iter(struct bio *bio, struct iov_iter *iter)
{
struct bio_vec *bvec;
struct bvec_iter_all iter_all;
bio_for_each_segment_all(bvec, bio, iter_all) {
ssize_t ret;
ret = copy_page_from_iter(bvec->bv_page,
bvec->bv_offset,
bvec->bv_len,
iter);
if (!iov_iter_count(iter))
break;
if (ret < bvec->bv_len)
return -EFAULT;
}
return 0;
}
/**
* bio_copy_to_iter - copy all pages from bio to iov_iter
* @bio: The &struct bio which describes the I/O as source
* @iter: iov_iter as destination
*
* Copy all pages from bio to iov_iter.
* Returns 0 on success, or error on failure.
*/
static int bio_copy_to_iter(struct bio *bio, struct iov_iter iter)
{
struct bio_vec *bvec;
struct bvec_iter_all iter_all;
bio_for_each_segment_all(bvec, bio, iter_all) {
ssize_t ret;
ret = copy_page_to_iter(bvec->bv_page,
bvec->bv_offset,
bvec->bv_len,
&iter);
if (!iov_iter_count(&iter))
break;
if (ret < bvec->bv_len)
return -EFAULT;
}
return 0;
}
/**
* bio_uncopy_user - finish previously mapped bio
* @bio: bio being terminated
*
* Free pages allocated from bio_copy_user_iov() and write back data
* to user space in case of a read.
*/
static int bio_uncopy_user(struct bio *bio)
{
struct bio_map_data *bmd = bio->bi_private;
int ret = 0;
if (!bio_flagged(bio, BIO_NULL_MAPPED)) {
/*
* if we're in a workqueue, the request is orphaned, so
* don't copy into a random user address space, just free
* and return -EINTR so user space doesn't expect any data.
*/
if (!current->mm)
ret = -EINTR;
else if (bio_data_dir(bio) == READ)
ret = bio_copy_to_iter(bio, bmd->iter);
if (bmd->is_our_pages)
bio_free_pages(bio);
}
kfree(bmd);
bio_put(bio);
return ret;
}
/**
* bio_copy_user_iov - copy user data to bio
* @q: destination block queue
* @map_data: pointer to the rq_map_data holding pages (if necessary)
* @iter: iovec iterator
* @gfp_mask: memory allocation flags
*
* Prepares and returns a bio for indirect user io, bouncing data
* to/from kernel pages as necessary. Must be paired with
* call bio_uncopy_user() on io completion.
*/
static struct bio *bio_copy_user_iov(struct request_queue *q,
struct rq_map_data *map_data, struct iov_iter *iter,
gfp_t gfp_mask)
{
struct bio_map_data *bmd;
struct page *page;
struct bio *bio;
int i = 0, ret;
int nr_pages;
unsigned int len = iter->count;
unsigned int offset = map_data ? offset_in_page(map_data->offset) : 0;
bmd = bio_alloc_map_data(iter, gfp_mask);
if (!bmd)
return ERR_PTR(-ENOMEM);
/*
* We need to do a deep copy of the iov_iter including the iovecs.
* The caller provided iov might point to an on-stack or otherwise
* shortlived one.
*/
bmd->is_our_pages = map_data ? 0 : 1;
nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE);
if (nr_pages > BIO_MAX_PAGES)
nr_pages = BIO_MAX_PAGES;
ret = -ENOMEM;
bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
goto out_bmd;
ret = 0;
if (map_data) {
nr_pages = 1 << map_data->page_order;
i = map_data->offset / PAGE_SIZE;
}
while (len) {
unsigned int bytes = PAGE_SIZE;
bytes -= offset;
if (bytes > len)
bytes = len;
if (map_data) {
if (i == map_data->nr_entries * nr_pages) {
ret = -ENOMEM;
break;
}
page = map_data->pages[i / nr_pages];
page += (i % nr_pages);
i++;
} else {
page = alloc_page(q->bounce_gfp | gfp_mask);
if (!page) {
ret = -ENOMEM;
break;
}
}
if (bio_add_pc_page(q, bio, page, bytes, offset) < bytes) {
if (!map_data)
__free_page(page);
break;
}
len -= bytes;
offset = 0;
}
if (ret)
goto cleanup;
if (map_data)
map_data->offset += bio->bi_iter.bi_size;
/*
* success
*/
if ((iov_iter_rw(iter) == WRITE &&
(!map_data || !map_data->null_mapped)) ||
(map_data && map_data->from_user)) {
ret = bio_copy_from_iter(bio, iter);
if (ret)
goto cleanup;
} else {
if (bmd->is_our_pages)
zero_fill_bio(bio);
iov_iter_advance(iter, bio->bi_iter.bi_size);
}
bio->bi_private = bmd;
if (map_data && map_data->null_mapped)
bio_set_flag(bio, BIO_NULL_MAPPED);
return bio;
cleanup:
if (!map_data)
bio_free_pages(bio);
bio_put(bio);
out_bmd:
kfree(bmd);
return ERR_PTR(ret);
}
/**
* bio_map_user_iov - map user iovec into bio
* @q: the struct request_queue for the bio
* @iter: iovec iterator
* @gfp_mask: memory allocation flags
*
* Map the user space address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
static struct bio *bio_map_user_iov(struct request_queue *q,
struct iov_iter *iter, gfp_t gfp_mask)
{
int j;
struct bio *bio;
int ret;
if (!iov_iter_count(iter))
return ERR_PTR(-EINVAL);
bio = bio_kmalloc(gfp_mask, iov_iter_npages(iter, BIO_MAX_PAGES));
if (!bio)
return ERR_PTR(-ENOMEM);
while (iov_iter_count(iter)) {
struct page **pages;
ssize_t bytes;
size_t offs, added = 0;
int npages;
bytes = iov_iter_get_pages_alloc(iter, &pages, LONG_MAX, &offs);
if (unlikely(bytes <= 0)) {
ret = bytes ? bytes : -EFAULT;
goto out_unmap;
}
npages = DIV_ROUND_UP(offs + bytes, PAGE_SIZE);
if (unlikely(offs & queue_dma_alignment(q))) {
ret = -EINVAL;
j = 0;
} else {
for (j = 0; j < npages; j++) {
struct page *page = pages[j];
unsigned int n = PAGE_SIZE - offs;
bool same_page = false;
if (n > bytes)
n = bytes;
if (!__bio_add_pc_page(q, bio, page, n, offs,
&same_page)) {
if (same_page)
put_page(page);
break;
}
added += n;
bytes -= n;
offs = 0;
}
iov_iter_advance(iter, added);
}
/*
* release the pages we didn't map into the bio, if any
*/
while (j < npages)
put_page(pages[j++]);
kvfree(pages);
/* couldn't stuff something into bio? */
if (bytes)
break;
}
bio_set_flag(bio, BIO_USER_MAPPED);
/*
* subtle -- if bio_map_user_iov() ended up bouncing a bio,
* it would normally disappear when its bi_end_io is run.
* however, we need it for the unmap, so grab an extra
* reference to it
*/
bio_get(bio);
return bio;
out_unmap:
bio_release_pages(bio, false);
bio_put(bio);
return ERR_PTR(ret);
}
/**
* bio_unmap_user - unmap a bio
* @bio: the bio being unmapped
*
* Unmap a bio previously mapped by bio_map_user_iov(). Must be called from
* process context.
*
* bio_unmap_user() may sleep.
*/
static void bio_unmap_user(struct bio *bio)
{
bio_release_pages(bio, bio_data_dir(bio) == READ);
bio_put(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);
}
/**
* bio_map_kern - map kernel address into bio
* @q: the struct request_queue for the bio
* @data: pointer to buffer to map
* @len: length in bytes
* @gfp_mask: allocation flags for bio allocation
*
* Map the kernel address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
static struct bio *bio_map_kern(struct request_queue *q, void *data,
unsigned int len, gfp_t gfp_mask)
{
unsigned long kaddr = (unsigned long)data;
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;
bio = bio_kmalloc(gfp_mask, nr_pages);
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;
if (len <= 0)
break;
if (bytes > len)
bytes = len;
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);
return ERR_PTR(-EINVAL);
}
data += bytes;
len -= bytes;
offset = 0;
}
bio->bi_end_io = bio_map_kern_endio;
return bio;
}
static void bio_copy_kern_endio(struct bio *bio)
{
bio_free_pages(bio);
bio_put(bio);
}
static void bio_copy_kern_endio_read(struct bio *bio)
{
char *p = bio->bi_private;
struct bio_vec *bvec;
struct bvec_iter_all iter_all;
bio_for_each_segment_all(bvec, bio, iter_all) {
memcpy(p, page_address(bvec->bv_page), bvec->bv_len);
p += bvec->bv_len;
}
bio_copy_kern_endio(bio);
}
/**
* bio_copy_kern - copy kernel address into bio
* @q: the struct request_queue for the bio
* @data: pointer to buffer to copy
* @len: length in bytes
* @gfp_mask: allocation flags for bio and page allocation
* @reading: data direction is READ
*
* copy the kernel address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
static struct bio *bio_copy_kern(struct request_queue *q, void *data,
unsigned int len, gfp_t gfp_mask, int reading)
{
unsigned long kaddr = (unsigned long)data;
unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned long start = kaddr >> PAGE_SHIFT;
struct bio *bio;
void *p = data;
int nr_pages = 0;
/*
* Overflow, abort
*/
if (end < start)
return ERR_PTR(-EINVAL);
nr_pages = end - start;
bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
return ERR_PTR(-ENOMEM);
while (len) {
struct page *page;
unsigned int bytes = PAGE_SIZE;
if (bytes > len)
bytes = len;
page = alloc_page(q->bounce_gfp | gfp_mask);
if (!page)
goto cleanup;
if (!reading)
memcpy(page_address(page), p, bytes);
if (bio_add_pc_page(q, bio, page, bytes, 0) < bytes)
break;
len -= bytes;
p += bytes;
}
if (reading) {
bio->bi_end_io = bio_copy_kern_endio_read;
bio->bi_private = data;
} else {
bio->bi_end_io = bio_copy_kern_endio;
}
return bio;
cleanup:
bio_free_pages(bio);
bio_put(bio);
return ERR_PTR(-ENOMEM);
}
/*
* Append a bio to a passthrough request. Only works if the bio can be merged
* into the request based on the driver constraints.

59
block/blk-mq.c
View File

@ -1178,6 +1178,23 @@ static void blk_mq_update_dispatch_busy(struct blk_mq_hw_ctx *hctx, bool busy)
#define BLK_MQ_RESOURCE_DELAY 3 /* ms units */
static void blk_mq_handle_dev_resource(struct request *rq,
struct list_head *list)
{
struct request *next =
list_first_entry_or_null(list, struct request, queuelist);
/*
* If an I/O scheduler has been configured and we got a driver tag for
* the next request already, free it.
*/
if (next)
blk_mq_put_driver_tag(next);
list_add(&rq->queuelist, list);
__blk_mq_requeue_request(rq);
}
/*
* Returns true if we did some work AND can potentially do more.
*/
@ -1245,17 +1262,7 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
ret = q->mq_ops->queue_rq(hctx, &bd);
if (ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE) {
/*
* If an I/O scheduler has been configured and we got a
* driver tag for the next request already, free it
* again.
*/
if (!list_empty(list)) {
nxt = list_first_entry(list, struct request, queuelist);
blk_mq_put_driver_tag(nxt);
}
list_add(&rq->queuelist, list);
__blk_mq_requeue_request(rq);
blk_mq_handle_dev_resource(rq, list);
break;
}
@ -2409,8 +2416,7 @@ blk_mq_alloc_hctx(struct request_queue *q, struct blk_mq_tag_set *set,
init_waitqueue_func_entry(&hctx->dispatch_wait, blk_mq_dispatch_wake);
INIT_LIST_HEAD(&hctx->dispatch_wait.entry);
hctx->fq = blk_alloc_flush_queue(q, hctx->numa_node, set->cmd_size,
gfp);
hctx->fq = blk_alloc_flush_queue(hctx->numa_node, set->cmd_size, gfp);
if (!hctx->fq)
goto free_bitmap;
@ -2718,13 +2724,15 @@ void blk_mq_release(struct request_queue *q)
blk_mq_sysfs_deinit(q);
}
struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set)
struct request_queue *blk_mq_init_queue_data(struct blk_mq_tag_set *set,
void *queuedata)
{
struct request_queue *uninit_q, *q;
uninit_q = blk_alloc_queue_node(GFP_KERNEL, set->numa_node);
uninit_q = __blk_alloc_queue(set->numa_node);
if (!uninit_q)
return ERR_PTR(-ENOMEM);
uninit_q->queuedata = queuedata;
/*
* Initialize the queue without an elevator. device_add_disk() will do
@ -2736,6 +2744,12 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set)
return q;
}
EXPORT_SYMBOL_GPL(blk_mq_init_queue_data);
struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set)
{
return blk_mq_init_queue_data(set, NULL);
}
EXPORT_SYMBOL(blk_mq_init_queue);
/*
@ -2824,7 +2838,6 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set,
memcpy(new_hctxs, hctxs, q->nr_hw_queues *
sizeof(*hctxs));
q->queue_hw_ctx = new_hctxs;
q->nr_hw_queues = set->nr_hw_queues;
kfree(hctxs);
hctxs = new_hctxs;
}
@ -2926,11 +2939,7 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
INIT_LIST_HEAD(&q->requeue_list);
spin_lock_init(&q->requeue_lock);
blk_queue_make_request(q, blk_mq_make_request);
/*
* Do this after blk_queue_make_request() overrides it...
*/
q->make_request_fn = blk_mq_make_request;
q->nr_requests = set->queue_depth;
/*
@ -3023,6 +3032,14 @@ static int blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set)
static int blk_mq_update_queue_map(struct blk_mq_tag_set *set)
{
/*
* blk_mq_map_queues() and multiple .map_queues() implementations
* expect that set->map[HCTX_TYPE_DEFAULT].nr_queues is set to the
* number of hardware queues.
*/
if (set->nr_maps == 1)
set->map[HCTX_TYPE_DEFAULT].nr_queues = set->nr_hw_queues;
if (set->ops->map_queues && !is_kdump_kernel()) {
int i;

36
block/blk-settings.c
View File

@ -86,42 +86,6 @@ void blk_set_stacking_limits(struct queue_limits *lim)
}
EXPORT_SYMBOL(blk_set_stacking_limits);
/**
* blk_queue_make_request - define an alternate make_request function for a device
* @q: the request queue for the device to be affected
* @mfn: the alternate make_request function
*
* Description:
* The normal way for &struct bios to be passed to a device
* driver is for them to be collected into requests on a request
* queue, and then to allow the device driver to select requests
* off that queue when it is ready. This works well for many block
* devices. However some block devices (typically virtual devices
* such as md or lvm) do not benefit from the processing on the
* request queue, and are served best by having the requests passed
* directly to them. This can be achieved by providing a function
* to blk_queue_make_request().
*
* Caveat:
* The driver that does this *must* be able to deal appropriately
* with buffers in "highmemory". This can be accomplished by either calling
* kmap_atomic() to get a temporary kernel mapping, or by calling
* blk_queue_bounce() to create a buffer in normal memory.
**/
void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn)
{
/*
* set defaults
*/
q->nr_requests = BLKDEV_MAX_RQ;
q->make_request_fn = mfn;
blk_queue_dma_alignment(q, 511);
blk_set_default_limits(&q->limits);
}
EXPORT_SYMBOL(blk_queue_make_request);
/**
* blk_queue_bounce_limit - set bounce buffer limit for queue
* @q: the request queue for the device

2
block/blk-zoned.c
View File

@ -173,7 +173,7 @@ int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op,
if (!op_is_zone_mgmt(op))
return -EOPNOTSUPP;
if (!nr_sectors || end_sector > capacity)
if (end_sector <= sector || end_sector > capacity)
/* Out of range */
return -EINVAL;

138
block/blk.h
View File

@ -4,6 +4,7 @@
#include <linux/idr.h>
#include <linux/blk-mq.h>
#include <linux/part_stat.h>
#include <xen/xen.h>
#include "blk-mq.h"
#include "blk-mq-sched.h"
@ -55,8 +56,8 @@ is_flush_rq(struct request *req, struct blk_mq_hw_ctx *hctx)
return hctx->fq->flush_rq == req;
}
struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
int node, int cmd_size, gfp_t flags);
struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size,
gfp_t flags);
void blk_free_flush_queue(struct blk_flush_queue *q);
void blk_freeze_queue(struct request_queue *q);
@ -149,6 +150,9 @@ static inline bool integrity_req_gap_front_merge(struct request *req,
return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1],
bip_next->bip_vec[0].bv_offset);
}
void blk_integrity_add(struct gendisk *);
void blk_integrity_del(struct gendisk *);
#else /* CONFIG_BLK_DEV_INTEGRITY */
static inline bool integrity_req_gap_back_merge(struct request *req,
struct bio *next)
@ -171,6 +175,12 @@ static inline bool bio_integrity_endio(struct bio *bio)
static inline void bio_integrity_free(struct bio *bio)
{
}
static inline void blk_integrity_add(struct gendisk *disk)
{
}
static inline void blk_integrity_del(struct gendisk *disk)
{
}
#endif /* CONFIG_BLK_DEV_INTEGRITY */
unsigned long blk_rq_timeout(unsigned long timeout);
@ -214,6 +224,17 @@ static inline void elevator_exit(struct request_queue *q,
struct hd_struct *__disk_get_part(struct gendisk *disk, int partno);
ssize_t part_size_show(struct device *dev, struct device_attribute *attr,
char *buf);
ssize_t part_stat_show(struct device *dev, struct device_attribute *attr,
char *buf);
ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,
char *buf);
ssize_t part_fail_show(struct device *dev, struct device_attribute *attr,
char *buf);
ssize_t part_fail_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
#ifdef CONFIG_FAIL_IO_TIMEOUT
int blk_should_fake_timeout(struct request_queue *);
ssize_t part_timeout_show(struct device *, struct device_attribute *, char *);
@ -354,4 +375,117 @@ void blk_queue_free_zone_bitmaps(struct request_queue *q);
static inline void blk_queue_free_zone_bitmaps(struct request_queue *q) {}
#endif
void part_dec_in_flight(struct request_queue *q, struct hd_struct *part,
int rw);
void part_inc_in_flight(struct request_queue *q, struct hd_struct *part,
int rw);
void update_io_ticks(struct hd_struct *part, unsigned long now, bool end);
struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector);
int blk_alloc_devt(struct hd_struct *part, dev_t *devt);
void blk_free_devt(dev_t devt);
void blk_invalidate_devt(dev_t devt);
char *disk_name(struct gendisk *hd, int partno, char *buf);
#define ADDPART_FLAG_NONE 0
#define ADDPART_FLAG_RAID 1
#define ADDPART_FLAG_WHOLEDISK 2
struct hd_struct *__must_check add_partition(struct gendisk *disk, int partno,
sector_t start, sector_t len, int flags,
struct partition_meta_info *info);
void __delete_partition(struct percpu_ref *ref);
void delete_partition(struct gendisk *disk, int partno);
int disk_expand_part_tbl(struct gendisk *disk, int target);
static inline int hd_ref_init(struct hd_struct *part)
{
if (percpu_ref_init(&part->ref, __delete_partition, 0,
GFP_KERNEL))
return -ENOMEM;
return 0;
}
static inline void hd_struct_get(struct hd_struct *part)
{
percpu_ref_get(&part->ref);
}
static inline int hd_struct_try_get(struct hd_struct *part)
{
return percpu_ref_tryget_live(&part->ref);
}
static inline void hd_struct_put(struct hd_struct *part)
{
percpu_ref_put(&part->ref);
}
static inline void hd_struct_kill(struct hd_struct *part)
{
percpu_ref_kill(&part->ref);
}
static inline void hd_free_part(struct hd_struct *part)
{
free_part_stats(part);
kfree(part->info);
percpu_ref_exit(&part->ref);
}
/*
* Any access of part->nr_sects which is not protected by partition
* bd_mutex or gendisk bdev bd_mutex, should be done using this
* accessor function.
*
* Code written along the lines of i_size_read() and i_size_write().
* CONFIG_PREEMPTION case optimizes the case of UP kernel with preemption
* on.
*/
static inline sector_t part_nr_sects_read(struct hd_struct *part)
{
#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
sector_t nr_sects;
unsigned seq;
do {
seq = read_seqcount_begin(&part->nr_sects_seq);
nr_sects = part->nr_sects;
} while (read_seqcount_retry(&part->nr_sects_seq, seq));
return nr_sects;
#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION)
sector_t nr_sects;
preempt_disable();
nr_sects = part->nr_sects;
preempt_enable();
return nr_sects;
#else
return part->nr_sects;
#endif
}
/*
* Should be called with mutex lock held (typically bd_mutex) of partition
* to provide mutual exlusion among writers otherwise seqcount might be
* left in wrong state leaving the readers spinning infinitely.
*/
static inline void part_nr_sects_write(struct hd_struct *part, sector_t size)
{
#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
write_seqcount_begin(&part->nr_sects_seq);
part->nr_sects = size;
write_seqcount_end(&part->nr_sects_seq);
#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION)
preempt_disable();
part->nr_sects = size;
preempt_enable();
#else
part->nr_sects = size;
#endif
}
struct request_queue *__blk_alloc_queue(int node_id);
int __bio_add_pc_page(struct request_queue *q, struct bio *bio,
struct page *page, unsigned int len, unsigned int offset,
bool *same_page);
#endif /* BLK_INTERNAL_H */

219
block/genhd.c
View File

@ -4,6 +4,7 @@
*/
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/fs.h>
#include <linux/genhd.h>
#include <linux/kdev_t.h>
@ -26,7 +27,7 @@
#include "blk.h"
static DEFINE_MUTEX(block_class_lock);
struct kobject *block_depr;
static struct kobject *block_depr;
/* for extended dynamic devt allocation, currently only one major is used */
#define NR_EXT_DEVT (1 << MINORBITS)
@ -46,6 +47,78 @@ static void disk_add_events(struct gendisk *disk);
static void disk_del_events(struct gendisk *disk);
static void disk_release_events(struct gendisk *disk);
/*
* Set disk capacity and notify if the size is not currently
* zero and will not be set to zero
*/
void set_capacity_revalidate_and_notify(struct gendisk *disk, sector_t size,
bool revalidate)
{
sector_t capacity = get_capacity(disk);
set_capacity(disk, size);
if (revalidate)
revalidate_disk(disk);
if (capacity != size && capacity != 0 && size != 0) {
char *envp[] = { "RESIZE=1", NULL };
kobject_uevent_env(&disk_to_dev(disk)->kobj, KOBJ_CHANGE, envp);
}
}
EXPORT_SYMBOL_GPL(set_capacity_revalidate_and_notify);
/*
* Format the device name of the indicated disk into the supplied buffer and
* return a pointer to that same buffer for convenience.
*/
char *disk_name(struct gendisk *hd, int partno, char *buf)
{
if (!partno)
snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name);
else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1]))
snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno);
else
snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno);
return buf;
}
const char *bdevname(struct block_device *bdev, char *buf)
{
return disk_name(bdev->bd_disk, bdev->bd_part->partno, buf);
}
EXPORT_SYMBOL(bdevname);
#ifdef CONFIG_SMP
static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat)
{
int cpu;
memset(stat, 0, sizeof(struct disk_stats));
for_each_possible_cpu(cpu) {
struct disk_stats *ptr = per_cpu_ptr(part->dkstats, cpu);
int group;
for (group = 0; group < NR_STAT_GROUPS; group++) {
stat->nsecs[group] += ptr->nsecs[group];
stat->sectors[group] += ptr->sectors[group];
stat->ios[group] += ptr->ios[group];
stat->merges[group] += ptr->merges[group];
}
stat->io_ticks += ptr->io_ticks;
}
}
#else /* CONFIG_SMP */
static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat)
{
memcpy(stat, &part->dkstats, sizeof(struct disk_stats));
}
#endif /* CONFIG_SMP */
void part_inc_in_flight(struct request_queue *q, struct hd_struct *part, int rw)
{
if (queue_is_mq(q))
@ -66,7 +139,8 @@ void part_dec_in_flight(struct request_queue *q, struct hd_struct *part, int rw)
part_stat_local_dec(&part_to_disk(part)->part0, in_flight[rw]);
}
unsigned int part_in_flight(struct request_queue *q, struct hd_struct *part)
static unsigned int part_in_flight(struct request_queue *q,
struct hd_struct *part)
{
int cpu;
unsigned int inflight;
@ -86,8 +160,8 @@ unsigned int part_in_flight(struct request_queue *q, struct hd_struct *part)
return inflight;
}
void part_in_flight_rw(struct request_queue *q, struct hd_struct *part,
unsigned int inflight[2])
static void part_in_flight_rw(struct request_queue *q, struct hd_struct *part,
unsigned int inflight[2])
{
int cpu;
@ -143,7 +217,6 @@ struct hd_struct *disk_get_part(struct gendisk *disk, int partno)
return part;
}
EXPORT_SYMBOL_GPL(disk_get_part);
/**
* disk_part_iter_init - initialize partition iterator
@ -299,7 +372,6 @@ struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector)
}
return &disk->part0;
}
EXPORT_SYMBOL_GPL(disk_map_sector_rcu);
/**
* disk_has_partitions
@ -944,7 +1016,6 @@ struct gendisk *get_gendisk(dev_t devt, int *partno)
}
return disk;
}
EXPORT_SYMBOL(get_gendisk);
/**
* bdget_disk - do bdget() by gendisk and partition number
@ -1190,6 +1261,67 @@ static ssize_t disk_ro_show(struct device *dev,
return sprintf(buf, "%d\n", get_disk_ro(disk) ? 1 : 0);
}
ssize_t part_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
return sprintf(buf, "%llu\n",
(unsigned long long)part_nr_sects_read(p));
}
ssize_t part_stat_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
struct request_queue *q = part_to_disk(p)->queue;
struct disk_stats stat;
unsigned int inflight;
part_stat_read_all(p, &stat);
inflight = part_in_flight(q, p);
return sprintf(buf,
"%8lu %8lu %8llu %8u "
"%8lu %8lu %8llu %8u "
"%8u %8u %8u "
"%8lu %8lu %8llu %8u "
"%8lu %8u"
"\n",
stat.ios[STAT_READ],
stat.merges[STAT_READ],
(unsigned long long)stat.sectors[STAT_READ],
(unsigned int)div_u64(stat.nsecs[STAT_READ], NSEC_PER_MSEC),
stat.ios[STAT_WRITE],
stat.merges[STAT_WRITE],
(unsigned long long)stat.sectors[STAT_WRITE],
(unsigned int)div_u64(stat.nsecs[STAT_WRITE], NSEC_PER_MSEC),
inflight,
jiffies_to_msecs(stat.io_ticks),
(unsigned int)div_u64(stat.nsecs[STAT_READ] +
stat.nsecs[STAT_WRITE] +
stat.nsecs[STAT_DISCARD] +
stat.nsecs[STAT_FLUSH],
NSEC_PER_MSEC),
stat.ios[STAT_DISCARD],
stat.merges[STAT_DISCARD],
(unsigned long long)stat.sectors[STAT_DISCARD],
(unsigned int)div_u64(stat.nsecs[STAT_DISCARD], NSEC_PER_MSEC),
stat.ios[STAT_FLUSH],
(unsigned int)div_u64(stat.nsecs[STAT_FLUSH], NSEC_PER_MSEC));
}
ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct hd_struct *p = dev_to_part(dev);
struct request_queue *q = part_to_disk(p)->queue;
unsigned int inflight[2];
part_in_flight_rw(q, p, inflight);
return sprintf(buf, "%8u %8u\n", inflight[0], inflight[1]);
}
static ssize_t disk_capability_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -1228,10 +1360,33 @@ static DEVICE_ATTR(capability, 0444, disk_capability_show, NULL);
static DEVICE_ATTR(stat, 0444, part_stat_show, NULL);
static DEVICE_ATTR(inflight, 0444, part_inflight_show, NULL);
static DEVICE_ATTR(badblocks, 0644, disk_badblocks_show, disk_badblocks_store);
#ifdef CONFIG_FAIL_MAKE_REQUEST
ssize_t part_fail_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
return sprintf(buf, "%d\n", p->make_it_fail);
}
ssize_t part_fail_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct hd_struct *p = dev_to_part(dev);
int i;
if (count > 0 && sscanf(buf, "%d", &i) > 0)
p->make_it_fail = (i == 0) ? 0 : 1;
return count;
}
static struct device_attribute dev_attr_fail =
__ATTR(make-it-fail, 0644, part_fail_show, part_fail_store);
#endif
#endif /* CONFIG_FAIL_MAKE_REQUEST */
#ifdef CONFIG_FAIL_IO_TIMEOUT
static struct device_attribute dev_attr_fail_timeout =
__ATTR(io-timeout-fail, 0644, part_timeout_show, part_timeout_store);
@ -1378,8 +1533,8 @@ static char *block_devnode(struct device *dev, umode_t *mode,
{
struct gendisk *disk = dev_to_disk(dev);
if (disk->devnode)
return disk->devnode(disk, mode);
if (disk->fops->devnode)
return disk->fops->devnode(disk, mode);
return NULL;
}
@ -1405,6 +1560,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
struct hd_struct *hd;
char buf[BDEVNAME_SIZE];
unsigned int inflight;
struct disk_stats stat;
/*
if (&disk_to_dev(gp)->kobj.entry == block_class.devices.next)
@ -1416,7 +1572,9 @@ static int diskstats_show(struct seq_file *seqf, void *v)
disk_part_iter_init(&piter, gp, DISK_PITER_INCL_EMPTY_PART0);
while ((hd = disk_part_iter_next(&piter))) {
part_stat_read_all(hd, &stat);
inflight = part_in_flight(gp->queue, hd);
seq_printf(seqf, "%4d %7d %s "
"%lu %lu %lu %u "
"%lu %lu %lu %u "
@ -1426,23 +1584,31 @@ static int diskstats_show(struct seq_file *seqf, void *v)
"\n",
MAJOR(part_devt(hd)), MINOR(part_devt(hd)),
disk_name(gp, hd->partno, buf),
part_stat_read(hd, ios[STAT_READ]),
part_stat_read(hd, merges[STAT_READ]),
part_stat_read(hd, sectors[STAT_READ]),
(unsigned int)part_stat_read_msecs(hd, STAT_READ),
part_stat_read(hd, ios[STAT_WRITE]),
part_stat_read(hd, merges[STAT_WRITE]),
part_stat_read(hd, sectors[STAT_WRITE]),
(unsigned int)part_stat_read_msecs(hd, STAT_WRITE),
stat.ios[STAT_READ],
stat.merges[STAT_READ],
stat.sectors[STAT_READ],
(unsigned int)div_u64(stat.nsecs[STAT_READ],
NSEC_PER_MSEC),
stat.ios[STAT_WRITE],
stat.merges[STAT_WRITE],
stat.sectors[STAT_WRITE],
(unsigned int)div_u64(stat.nsecs[STAT_WRITE],
NSEC_PER_MSEC),
inflight,
jiffies_to_msecs(part_stat_read(hd, io_ticks)),
jiffies_to_msecs(part_stat_read(hd, time_in_queue)),
part_stat_read(hd, ios[STAT_DISCARD]),
part_stat_read(hd, merges[STAT_DISCARD]),
part_stat_read(hd, sectors[STAT_DISCARD]),
(unsigned int)part_stat_read_msecs(hd, STAT_DISCARD),
part_stat_read(hd, ios[STAT_FLUSH]),
(unsigned int)part_stat_read_msecs(hd, STAT_FLUSH)
jiffies_to_msecs(stat.io_ticks),
(unsigned int)div_u64(stat.nsecs[STAT_READ] +
stat.nsecs[STAT_WRITE] +
stat.nsecs[STAT_DISCARD] +
stat.nsecs[STAT_FLUSH],
NSEC_PER_MSEC),
stat.ios[STAT_DISCARD],
stat.merges[STAT_DISCARD],
stat.sectors[STAT_DISCARD],
(unsigned int)div_u64(stat.nsecs[STAT_DISCARD],
NSEC_PER_MSEC),
stat.ios[STAT_FLUSH],
(unsigned int)div_u64(stat.nsecs[STAT_FLUSH],
NSEC_PER_MSEC)
);
}
disk_part_iter_exit(&piter);
@ -1499,7 +1665,6 @@ dev_t blk_lookup_devt(const char *name, int partno)
class_dev_iter_exit(&iter);
return devt;
}
EXPORT_SYMBOL(blk_lookup_devt);
struct gendisk *__alloc_disk_node(int minors, int node_id)
{

1
block/ioctl.c
View File

@ -11,6 +11,7 @@
#include <linux/blktrace_api.h>
#include <linux/pr.h>
#include <linux/uaccess.h>
#include "blk.h"
static int blkpg_do_ioctl(struct block_device *bdev,
struct blkpg_partition __user *upart, int op)

1
block/opal_proto.h
View File

@ -36,6 +36,7 @@ enum opal_response_token {
#define DTAERROR_NO_METHOD_STATUS 0x89
#define GENERIC_HOST_SESSION_NUM 0x41
#define FIRST_TPER_SESSION_NUM 4096
#define TPER_SYNC_SUPPORTED 0x01
#define MBR_ENABLED_MASK 0x10

3
block/partitions/Makefile
View File

@ -3,8 +3,7 @@
# Makefile for the linux kernel.
#
obj-$(CONFIG_BLOCK) := check.o
obj-$(CONFIG_BLOCK) += core.o
obj-$(CONFIG_ACORN_PARTITION) += acorn.o
obj-$(CONFIG_AMIGA_PARTITION) += amiga.o
obj-$(CONFIG_ATARI_PARTITION) += atari.o

1
block/partitions/acorn.c
View File

@ -11,7 +11,6 @@
#include <linux/adfs_fs.h>
#include "check.h"
#include "acorn.h"
/*
* Partition types. (Oh for reusability)

15
block/partitions/acorn.h
View File

@ -1,15 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/fs/partitions/acorn.h
*
* Copyright (C) 1996-2001 Russell King.
*
* I _hate_ this partitioning mess - why can't we have one defined
* format, and everyone stick to it?
*/
int adfspart_check_CUMANA(struct parsed_partitions *state);
int adfspart_check_ADFS(struct parsed_partitions *state);
int adfspart_check_ICS(struct parsed_partitions *state);
int adfspart_check_POWERTEC(struct parsed_partitions *state);
int adfspart_check_EESOX(struct parsed_partitions *state);

1
block/partitions/aix.c
View File

@ -6,7 +6,6 @@
*/
#include "check.h"
#include "aix.h"
struct lvm_rec {
char lvm_id[4]; /* "_LVM" */

2
block/partitions/aix.h
View File

@ -1,2 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
extern int aix_partition(struct parsed_partitions *state);

11
block/partitions/amiga.c
View File

@ -14,7 +14,6 @@
#include <linux/affs_hardblocks.h>
#include "check.h"
#include "amiga.h"
static __inline__ u32
checksum_block(__be32 *m, int size)
@ -42,9 +41,8 @@ int amiga_partition(struct parsed_partitions *state)
goto rdb_done;
data = read_part_sector(state, blk, &sect);
if (!data) {
if (warn_no_part)
pr_err("Dev %s: unable to read RDB block %d\n",
bdevname(state->bdev, b), blk);
pr_err("Dev %s: unable to read RDB block %d\n",
bdevname(state->bdev, b), blk);
res = -1;
goto rdb_done;
}
@ -85,9 +83,8 @@ int amiga_partition(struct parsed_partitions *state)
blk *= blksize; /* Read in terms partition table understands */
data = read_part_sector(state, blk, &sect);
if (!data) {
if (warn_no_part)
pr_err("Dev %s: unable to read partition block %d\n",
bdevname(state->bdev, b), blk);
pr_err("Dev %s: unable to read partition block %d\n",
bdevname(state->bdev, b), blk);
res = -1;
goto rdb_done;
}

7
block/partitions/amiga.h
View File

@ -1,7 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* fs/partitions/amiga.h
*/
int amiga_partition(struct parsed_partitions *state);

1
block/partitions/atari.h
View File

@ -34,4 +34,3 @@ struct rootsector
u16 checksum; /* checksum for bootable disks */
} __packed;
int atari_partition(struct parsed_partitions *state);

198
block/partitions/check.c
View File

@ -1,198 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* fs/partitions/check.c
*
* Code extracted from drivers/block/genhd.c
* Copyright (C) 1991-1998 Linus Torvalds
* Re-organised Feb 1998 Russell King
*
* We now have independent partition support from the
* block drivers, which allows all the partition code to
* be grouped in one location, and it to be mostly self
* contained.
*
* Added needed MAJORS for new pairs, {hdi,hdj}, {hdk,hdl}
*/
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/ctype.h>
#include <linux/genhd.h>
#include "check.h"
#include "acorn.h"
#include "amiga.h"
#include "atari.h"
#include "ldm.h"
#include "mac.h"
#include "msdos.h"
#include "osf.h"
#include "sgi.h"
#include "sun.h"
#include "ibm.h"
#include "ultrix.h"
#include "efi.h"
#include "karma.h"
#include "sysv68.h"
#include "cmdline.h"
int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/
static int (*check_part[])(struct parsed_partitions *) = {
/*
* Probe partition formats with tables at disk address 0
* that also have an ADFS boot block at 0xdc0.
*/
#ifdef CONFIG_ACORN_PARTITION_ICS
adfspart_check_ICS,
#endif
#ifdef CONFIG_ACORN_PARTITION_POWERTEC
adfspart_check_POWERTEC,
#endif
#ifdef CONFIG_ACORN_PARTITION_EESOX
adfspart_check_EESOX,
#endif
/*
* Now move on to formats that only have partition info at
* disk address 0xdc0. Since these may also have stale
* PC/BIOS partition tables, they need to come before
* the msdos entry.
*/
#ifdef CONFIG_ACORN_PARTITION_CUMANA
adfspart_check_CUMANA,
#endif
#ifdef CONFIG_ACORN_PARTITION_ADFS
adfspart_check_ADFS,
#endif
#ifdef CONFIG_CMDLINE_PARTITION
cmdline_partition,
#endif
#ifdef CONFIG_EFI_PARTITION
efi_partition, /* this must come before msdos */
#endif
#ifdef CONFIG_SGI_PARTITION
sgi_partition,
#endif
#ifdef CONFIG_LDM_PARTITION
ldm_partition, /* this must come before msdos */
#endif
#ifdef CONFIG_MSDOS_PARTITION
msdos_partition,
#endif
#ifdef CONFIG_OSF_PARTITION
osf_partition,
#endif
#ifdef CONFIG_SUN_PARTITION
sun_partition,
#endif
#ifdef CONFIG_AMIGA_PARTITION
amiga_partition,
#endif
#ifdef CONFIG_ATARI_PARTITION
atari_partition,
#endif
#ifdef CONFIG_MAC_PARTITION
mac_partition,
#endif
#ifdef CONFIG_ULTRIX_PARTITION
ultrix_partition,
#endif
#ifdef CONFIG_IBM_PARTITION
ibm_partition,
#endif
#ifdef CONFIG_KARMA_PARTITION
karma_partition,
#endif
#ifdef CONFIG_SYSV68_PARTITION
sysv68_partition,
#endif
NULL
};
static struct parsed_partitions *allocate_partitions(struct gendisk *hd)
{
struct parsed_partitions *state;
int nr;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
nr = disk_max_parts(hd);
state->parts = vzalloc(array_size(nr, sizeof(state->parts[0])));
if (!state->parts) {
kfree(state);
return NULL;
}
state->limit = nr;
return state;
}
void free_partitions(struct parsed_partitions *state)
{
vfree(state->parts);
kfree(state);
}
struct parsed_partitions *
check_partition(struct gendisk *hd, struct block_device *bdev)
{
struct parsed_partitions *state;
int i, res, err;
state = allocate_partitions(hd);
if (!state)
return NULL;
state->pp_buf = (char *)__get_free_page(GFP_KERNEL);
if (!state->pp_buf) {
free_partitions(state);
return NULL;
}
state->pp_buf[0] = '\0';
state->bdev = bdev;
disk_name(hd, 0, state->name);
snprintf(state->pp_buf, PAGE_SIZE, " %s:", state->name);
if (isdigit(state->name[strlen(state->name)-1]))
sprintf(state->name, "p");
i = res = err = 0;
while (!res && check_part[i]) {
memset(state->parts, 0, state->limit * sizeof(state->parts[0]));
res = check_part[i++](state);
if (res < 0) {
/* We have hit an I/O error which we don't report now.
* But record it, and let the others do their job.
*/
err = res;
res = 0;
}
}
if (res > 0) {
printk(KERN_INFO "%s", state->pp_buf);
free_page((unsigned long)state->pp_buf);
return state;
}
if (state->access_beyond_eod)
err = -ENOSPC;
if (err)
/* The partition is unrecognized. So report I/O errors if there were any */
res = err;
if (res) {
if (warn_no_part)
strlcat(state->pp_buf,
" unable to read partition table\n", PAGE_SIZE);
printk(KERN_INFO "%s", state->pp_buf);
}
free_page((unsigned long)state->pp_buf);
free_partitions(state);
return ERR_PTR(res);
}

41
block/partitions/check.h
View File

@ -2,6 +2,7 @@
#include <linux/pagemap.h>
#include <linux/blkdev.h>
#include <linux/genhd.h>
#include "../blk.h"
/*
* add_gd_partition adds a partitions details to the devices partition
@ -23,19 +24,14 @@ struct parsed_partitions {
char *pp_buf;
};
void free_partitions(struct parsed_partitions *state);
typedef struct {
struct page *v;
} Sector;
struct parsed_partitions *
check_partition(struct gendisk *, struct block_device *);
static inline void *read_part_sector(struct parsed_partitions *state,
sector_t n, Sector *p)
void *read_part_sector(struct parsed_partitions *state, sector_t n, Sector *p);
static inline void put_dev_sector(Sector p)
{
if (n >= get_capacity(state->bdev->bd_disk)) {
state->access_beyond_eod = true;
return NULL;
}
return read_dev_sector(state->bdev, n, p);
put_page(p.v);
}
static inline void
@ -51,5 +47,24 @@ put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size)
}
}
extern int warn_no_part;
/* detection routines go here in alphabetical order: */
int adfspart_check_ADFS(struct parsed_partitions *state);
int adfspart_check_CUMANA(struct parsed_partitions *state);
int adfspart_check_EESOX(struct parsed_partitions *state);
int adfspart_check_ICS(struct parsed_partitions *state);
int adfspart_check_POWERTEC(struct parsed_partitions *state);
int aix_partition(struct parsed_partitions *state);
int amiga_partition(struct parsed_partitions *state);
int atari_partition(struct parsed_partitions *state);
int cmdline_partition(struct parsed_partitions *state);
int efi_partition(struct parsed_partitions *state);
int ibm_partition(struct parsed_partitions *);
int karma_partition(struct parsed_partitions *state);
int ldm_partition(struct parsed_partitions *state);
int mac_partition(struct parsed_partitions *state);
int msdos_partition(struct parsed_partitions *state);
int osf_partition(struct parsed_partitions *state);
int sgi_partition(struct parsed_partitions *state);
int sun_partition(struct parsed_partitions *state);
int sysv68_partition(struct parsed_partitions *state);
int ultrix_partition(struct parsed_partitions *state);

1
block/partitions/cmdline.c
View File

@ -18,7 +18,6 @@
#include <linux/cmdline-parser.h>
#include "check.h"
#include "cmdline.h"
static char *cmdline;
static struct cmdline_parts *bdev_parts;

3
block/partitions/cmdline.h
View File

@ -1,3 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
int cmdline_partition(struct parsed_partitions *state);

321
block/partition-generic.c → block/partitions/core.c
View File

@ -1,75 +1,176 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Code extracted from drivers/block/genhd.c
* Copyright (C) 1991-1998 Linus Torvalds
* Re-organised Feb 1998 Russell King
*
* We now have independent partition support from the
* block drivers, which allows all the partition code to
* be grouped in one location, and it to be mostly self
* contained.
* Copyright (C) 1991-1998 Linus Torvalds
* Re-organised Feb 1998 Russell King
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/kmod.h>
#include <linux/ctype.h>
#include <linux/genhd.h>
#include <linux/vmalloc.h>
#include <linux/blktrace_api.h>
#include <linux/raid/detect.h>
#include "check.h"
#include "partitions/check.h"
#ifdef CONFIG_BLK_DEV_MD
extern void md_autodetect_dev(dev_t dev);
static int (*check_part[])(struct parsed_partitions *) = {
/*
* Probe partition formats with tables at disk address 0
* that also have an ADFS boot block at 0xdc0.
*/
#ifdef CONFIG_ACORN_PARTITION_ICS
adfspart_check_ICS,
#endif
#ifdef CONFIG_ACORN_PARTITION_POWERTEC
adfspart_check_POWERTEC,
#endif
#ifdef CONFIG_ACORN_PARTITION_EESOX
adfspart_check_EESOX,
#endif
/*
* disk_name() is used by partition check code and the genhd driver.
* It formats the devicename of the indicated disk into
* the supplied buffer (of size at least 32), and returns
* a pointer to that same buffer (for convenience).
*/
char *disk_name(struct gendisk *hd, int partno, char *buf)
/*
* Now move on to formats that only have partition info at
* disk address 0xdc0. Since these may also have stale
* PC/BIOS partition tables, they need to come before
* the msdos entry.
*/
#ifdef CONFIG_ACORN_PARTITION_CUMANA
adfspart_check_CUMANA,
#endif
#ifdef CONFIG_ACORN_PARTITION_ADFS
adfspart_check_ADFS,
#endif
#ifdef CONFIG_CMDLINE_PARTITION
cmdline_partition,
#endif
#ifdef CONFIG_EFI_PARTITION
efi_partition, /* this must come before msdos */
#endif
#ifdef CONFIG_SGI_PARTITION
sgi_partition,
#endif
#ifdef CONFIG_LDM_PARTITION
ldm_partition, /* this must come before msdos */
#endif
#ifdef CONFIG_MSDOS_PARTITION
msdos_partition,
#endif
#ifdef CONFIG_OSF_PARTITION
osf_partition,
#endif
#ifdef CONFIG_SUN_PARTITION
sun_partition,
#endif
#ifdef CONFIG_AMIGA_PARTITION
amiga_partition,
#endif
#ifdef CONFIG_ATARI_PARTITION
atari_partition,
#endif
#ifdef CONFIG_MAC_PARTITION
mac_partition,
#endif
#ifdef CONFIG_ULTRIX_PARTITION
ultrix_partition,
#endif
#ifdef CONFIG_IBM_PARTITION
ibm_partition,
#endif
#ifdef CONFIG_KARMA_PARTITION
karma_partition,
#endif
#ifdef CONFIG_SYSV68_PARTITION
sysv68_partition,
#endif
NULL
};
static struct parsed_partitions *allocate_partitions(struct gendisk *hd)
{
if (!partno)
snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name);
else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1]))
snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno);
else
snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno);
struct parsed_partitions *state;
int nr;
return buf;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
nr = disk_max_parts(hd);
state->parts = vzalloc(array_size(nr, sizeof(state->parts[0])));
if (!state->parts) {
kfree(state);
return NULL;
}
state->limit = nr;
return state;
}
const char *bdevname(struct block_device *bdev, char *buf)
static void free_partitions(struct parsed_partitions *state)
{
return disk_name(bdev->bd_disk, bdev->bd_part->partno, buf);
vfree(state->parts);
kfree(state);
}
EXPORT_SYMBOL(bdevname);
const char *bio_devname(struct bio *bio, char *buf)
static struct parsed_partitions *check_partition(struct gendisk *hd,
struct block_device *bdev)
{
return disk_name(bio->bi_disk, bio->bi_partno, buf);
}
EXPORT_SYMBOL(bio_devname);
struct parsed_partitions *state;
int i, res, err;
/*
* There's very little reason to use this, you should really
* have a struct block_device just about everywhere and use
* bdevname() instead.
*/
const char *__bdevname(dev_t dev, char *buffer)
{
scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)",
MAJOR(dev), MINOR(dev));
return buffer;
}
state = allocate_partitions(hd);
if (!state)
return NULL;
state->pp_buf = (char *)__get_free_page(GFP_KERNEL);
if (!state->pp_buf) {
free_partitions(state);
return NULL;
}
state->pp_buf[0] = '\0';
EXPORT_SYMBOL(__bdevname);
state->bdev = bdev;
disk_name(hd, 0, state->name);
snprintf(state->pp_buf, PAGE_SIZE, " %s:", state->name);
if (isdigit(state->name[strlen(state->name)-1]))
sprintf(state->name, "p");
i = res = err = 0;
while (!res && check_part[i]) {
memset(state->parts, 0, state->limit * sizeof(state->parts[0]));
res = check_part[i++](state);
if (res < 0) {
/*
* We have hit an I/O error which we don't report now.
* But record it, and let the others do their job.
*/
err = res;
res = 0;
}
}
if (res > 0) {
printk(KERN_INFO "%s", state->pp_buf);
free_page((unsigned long)state->pp_buf);
return state;
}
if (state->access_beyond_eod)
err = -ENOSPC;
/*
* The partition is unrecognized. So report I/O errors if there were any
*/
if (err)
res = err;
if (res) {
strlcat(state->pp_buf,
" unable to read partition table\n", PAGE_SIZE);
printk(KERN_INFO "%s", state->pp_buf);
}
free_page((unsigned long)state->pp_buf);
free_partitions(state);
return ERR_PTR(res);
}
static ssize_t part_partition_show(struct device *dev,
struct device_attribute *attr, char *buf)
@ -87,13 +188,6 @@ static ssize_t part_start_show(struct device *dev,
return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect);
}
ssize_t part_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
return sprintf(buf, "%llu\n",(unsigned long long)part_nr_sects_read(p));
}
static ssize_t part_ro_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -115,74 +209,6 @@ static ssize_t part_discard_alignment_show(struct device *dev,
return sprintf(buf, "%u\n", p->discard_alignment);
}
ssize_t part_stat_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
struct request_queue *q = part_to_disk(p)->queue;
unsigned int inflight;
inflight = part_in_flight(q, p);
return sprintf(buf,
"%8lu %8lu %8llu %8u "
"%8lu %8lu %8llu %8u "
"%8u %8u %8u "
"%8lu %8lu %8llu %8u "
"%8lu %8u"
"\n",
part_stat_read(p, ios[STAT_READ]),
part_stat_read(p, merges[STAT_READ]),
(unsigned long long)part_stat_read(p, sectors[STAT_READ]),
(unsigned int)part_stat_read_msecs(p, STAT_READ),
part_stat_read(p, ios[STAT_WRITE]),
part_stat_read(p, merges[STAT_WRITE]),
(unsigned long long)part_stat_read(p, sectors[STAT_WRITE]),
(unsigned int)part_stat_read_msecs(p, STAT_WRITE),
inflight,
jiffies_to_msecs(part_stat_read(p, io_ticks)),
jiffies_to_msecs(part_stat_read(p, time_in_queue)),
part_stat_read(p, ios[STAT_DISCARD]),
part_stat_read(p, merges[STAT_DISCARD]),
(unsigned long long)part_stat_read(p, sectors[STAT_DISCARD]),
(unsigned int)part_stat_read_msecs(p, STAT_DISCARD),
part_stat_read(p, ios[STAT_FLUSH]),
(unsigned int)part_stat_read_msecs(p, STAT_FLUSH));
}
ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct hd_struct *p = dev_to_part(dev);
struct request_queue *q = part_to_disk(p)->queue;
unsigned int inflight[2];
part_in_flight_rw(q, p, inflight);
return sprintf(buf, "%8u %8u\n", inflight[0], inflight[1]);
}
#ifdef CONFIG_FAIL_MAKE_REQUEST
ssize_t part_fail_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
return sprintf(buf, "%d\n", p->make_it_fail);
}
ssize_t part_fail_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct hd_struct *p = dev_to_part(dev);
int i;
if (count > 0 && sscanf(buf, "%d", &i) > 0)
p->make_it_fail = (i == 0) ? 0 : 1;
return count;
}
#endif
static DEVICE_ATTR(partition, 0444, part_partition_show, NULL);
static DEVICE_ATTR(start, 0444, part_start_show, NULL);
static DEVICE_ATTR(size, 0444, part_size_show, NULL);
@ -369,7 +395,9 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
p->policy = get_disk_ro(disk);
if (info) {
struct partition_meta_info *pinfo = alloc_part_info(disk);
struct partition_meta_info *pinfo;
pinfo = kzalloc_node(sizeof(*pinfo), GFP_KERNEL, disk->node_id);
if (!pinfo) {
err = -ENOMEM;
goto out_free_stats;
@ -428,7 +456,7 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
return p;
out_free_info:
free_part_info(p);
kfree(p->info);
out_free_stats:
free_part_stats(p);
out_free:
@ -525,10 +553,10 @@ static bool blk_add_partition(struct gendisk *disk, struct block_device *bdev,
return true;
}
#ifdef CONFIG_BLK_DEV_MD
if (state->parts[p].flags & ADDPART_FLAG_RAID)
if (IS_BUILTIN(CONFIG_BLK_DEV_MD) &&
(state->parts[p].flags & ADDPART_FLAG_RAID))
md_autodetect_dev(part_to_dev(part)->devt);
#endif
return true;
}
@ -602,22 +630,29 @@ out_free_state:
return ret;
}
unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p)
void *read_part_sector(struct parsed_partitions *state, sector_t n, Sector *p)
{
struct address_space *mapping = bdev->bd_inode->i_mapping;
struct address_space *mapping = state->bdev->bd_inode->i_mapping;
struct page *page;
page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_SHIFT-9)), NULL);
if (!IS_ERR(page)) {
if (PageError(page))
goto fail;
p->v = page;
return (unsigned char *)page_address(page) + ((n & ((1 << (PAGE_SHIFT - 9)) - 1)) << 9);
fail:
put_page(page);
if (n >= get_capacity(state->bdev->bd_disk)) {
state->access_beyond_eod = true;
return NULL;
}
page = read_mapping_page(mapping,
(pgoff_t)(n >> (PAGE_SHIFT - 9)), NULL);
if (IS_ERR(page))
goto out;
if (PageError(page))
goto out_put_page;
p->v = page;
return (unsigned char *)page_address(page) +
((n & ((1 << (PAGE_SHIFT - 9)) - 1)) << SECTOR_SHIFT);
out_put_page:
put_page(page);
out:
p->v = NULL;
return NULL;
}
EXPORT_SYMBOL(read_dev_sector);

3
block/partitions/efi.h
View File

@ -113,7 +113,4 @@ typedef struct _legacy_mbr {
__le16 signature;
} __packed legacy_mbr;
/* Functions */
extern int efi_partition(struct parsed_partitions *state);
#endif

1
block/partitions/ibm.c
View File

@ -15,7 +15,6 @@
#include <asm/vtoc.h>
#include "check.h"
#include "ibm.h"
union label_t {

2
block/partitions/ibm.h
View File

@ -1,2 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
int ibm_partition(struct parsed_partitions *);

3
block/partitions/karma.c
View File

@ -8,9 +8,10 @@
*/
#include "check.h"
#include "karma.h"
#include <linux/compiler.h>
#define KARMA_LABEL_MAGIC 0xAB56
int karma_partition(struct parsed_partitions *state)
{
int i;

9
block/partitions/karma.h
View File

@ -1,9 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* fs/partitions/karma.h
*/
#define KARMA_LABEL_MAGIC 0xAB56
int karma_partition(struct parsed_partitions *state);

6
block/partitions/ldm.c
View File

@ -14,10 +14,10 @@
#include <linux/stringify.h>
#include <linux/kernel.h>
#include <linux/uuid.h>
#include <linux/msdos_partition.h>
#include "ldm.h"
#include "check.h"
#include "msdos.h"
/*
* ldm_debug/info/error/crit - Output an error message
@ -493,7 +493,7 @@ static bool ldm_validate_partition_table(struct parsed_partitions *state)
{
Sector sect;
u8 *data;
struct partition *p;
struct msdos_partition *p;
int i;
bool result = false;
@ -508,7 +508,7 @@ static bool ldm_validate_partition_table(struct parsed_partitions *state)
if (*(__le16*) (data + 0x01FE) != cpu_to_le16 (MSDOS_LABEL_MAGIC))
goto out;
p = (struct partition*)(data + 0x01BE);
p = (struct msdos_partition *)(data + 0x01BE);
for (i = 0; i < 4; i++, p++)
if (SYS_IND (p) == LDM_PARTITION) {
result = true;

2
block/partitions/ldm.h
View File

@ -193,7 +193,5 @@ struct ldmdb { /* Cache of the database */
struct list_head v_part;
};
int ldm_partition(struct parsed_partitions *state);
#endif /* _FS_PT_LDM_H_ */

1
block/partitions/mac.h
View File

@ -42,4 +42,3 @@ struct mac_driver_desc {
/* ... more stuff */
};
int mac_partition(struct parsed_partitions *state);

172
block/partitions/msdos.c
View File

@ -18,13 +18,18 @@
* Check partition table on IDE disks for common CHS translations
*
* Re-organised Feb 1998 Russell King
*
* BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il>
* updated by Marc Espie <Marc.Espie@openbsd.org>
*
* Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl>
* and Krzysztof G. Baranowski <kgb@knm.org.pl>
*/
#include <linux/msdos_fs.h>
#include <linux/msdos_partition.h>
#include "check.h"
#include "msdos.h"
#include "efi.h"
#include "aix.h"
/*
* Many architectures don't like unaligned accesses, while
@ -35,17 +40,17 @@
#define SYS_IND(p) get_unaligned(&p->sys_ind)
static inline sector_t nr_sects(struct partition *p)
static inline sector_t nr_sects(struct msdos_partition *p)
{
return (sector_t)get_unaligned_le32(&p->nr_sects);
}
static inline sector_t start_sect(struct partition *p)
static inline sector_t start_sect(struct msdos_partition *p)
{
return (sector_t)get_unaligned_le32(&p->start_sect);
}
static inline int is_extended_partition(struct partition *p)
static inline int is_extended_partition(struct msdos_partition *p)
{
return (SYS_IND(p) == DOS_EXTENDED_PARTITION ||
SYS_IND(p) == WIN98_EXTENDED_PARTITION ||
@ -68,7 +73,7 @@ msdos_magic_present(unsigned char *p)
#define AIX_LABEL_MAGIC4 0xC1
static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
{
struct partition *pt = (struct partition *) (p + 0x1be);
struct msdos_partition *pt = (struct msdos_partition *) (p + 0x1be);
Sector sect;
unsigned char *d;
int slot, ret = 0;
@ -78,13 +83,19 @@ static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
p[2] == AIX_LABEL_MAGIC3 &&
p[3] == AIX_LABEL_MAGIC4))
return 0;
/* Assume the partition table is valid if Linux partitions exists */
/*
* Assume the partition table is valid if Linux partitions exists.
* Note that old Solaris/x86 partitions use the same indicator as
* Linux swap partitions, so we consider that a Linux partition as
* well.
*/
for (slot = 1; slot <= 4; slot++, pt++) {
if (pt->sys_ind == LINUX_SWAP_PARTITION ||
pt->sys_ind == LINUX_RAID_PARTITION ||
pt->sys_ind == LINUX_DATA_PARTITION ||
pt->sys_ind == LINUX_LVM_PARTITION ||
is_extended_partition(pt))
if (pt->sys_ind == SOLARIS_X86_PARTITION ||
pt->sys_ind == LINUX_RAID_PARTITION ||
pt->sys_ind == LINUX_DATA_PARTITION ||
pt->sys_ind == LINUX_LVM_PARTITION ||
is_extended_partition(pt))
return 0;
}
d = read_part_sector(state, 7, &sect);
@ -122,7 +133,7 @@ static void parse_extended(struct parsed_partitions *state,
sector_t first_sector, sector_t first_size,
u32 disksig)
{
struct partition *p;
struct msdos_partition *p;
Sector sect;
unsigned char *data;
sector_t this_sector, this_size;
@ -146,7 +157,7 @@ static void parse_extended(struct parsed_partitions *state,
if (!msdos_magic_present(data + 510))
goto done;
p = (struct partition *) (data + 0x1be);
p = (struct msdos_partition *) (data + 0x1be);
/*
* Usually, the first entry is the real data partition,
@ -210,6 +221,30 @@ done:
put_dev_sector(sect);
}
#define SOLARIS_X86_NUMSLICE 16
#define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL)
struct solaris_x86_slice {
__le16 s_tag; /* ID tag of partition */
__le16 s_flag; /* permission flags */
__le32 s_start; /* start sector no of partition */
__le32 s_size; /* # of blocks in partition */
};
struct solaris_x86_vtoc {
unsigned int v_bootinfo[3]; /* info needed by mboot */
__le32 v_sanity; /* to verify vtoc sanity */
__le32 v_version; /* layout version */
char v_volume[8]; /* volume name */
__le16 v_sectorsz; /* sector size in bytes */
__le16 v_nparts; /* number of partitions */
unsigned int v_reserved[10]; /* free space */
struct solaris_x86_slice
v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */
unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp */
char v_asciilabel[128]; /* for compatibility */
};
/* james@bpgc.com: Solaris has a nasty indicator: 0x82 which also
indicates linux swap. Be careful before believing this is Solaris. */
@ -265,6 +300,54 @@ static void parse_solaris_x86(struct parsed_partitions *state,
#endif
}
/* check against BSD src/sys/sys/disklabel.h for consistency */
#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
#define BSD_MAXPARTITIONS 16
#define OPENBSD_MAXPARTITIONS 16
#define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */
struct bsd_disklabel {
__le32 d_magic; /* the magic number */
__s16 d_type; /* drive type */
__s16 d_subtype; /* controller/d_type specific */
char d_typename[16]; /* type name, e.g. "eagle" */
char d_packname[16]; /* pack identifier */
__u32 d_secsize; /* # of bytes per sector */
__u32 d_nsectors; /* # of data sectors per track */
__u32 d_ntracks; /* # of tracks per cylinder */
__u32 d_ncylinders; /* # of data cylinders per unit */
__u32 d_secpercyl; /* # of data sectors per cylinder */
__u32 d_secperunit; /* # of data sectors per unit */
__u16 d_sparespertrack; /* # of spare sectors per track */
__u16 d_sparespercyl; /* # of spare sectors per cylinder */
__u32 d_acylinders; /* # of alt. cylinders per unit */
__u16 d_rpm; /* rotational speed */
__u16 d_interleave; /* hardware sector interleave */
__u16 d_trackskew; /* sector 0 skew, per track */
__u16 d_cylskew; /* sector 0 skew, per cylinder */
__u32 d_headswitch; /* head switch time, usec */
__u32 d_trkseek; /* track-to-track seek, usec */
__u32 d_flags; /* generic flags */
#define NDDATA 5
__u32 d_drivedata[NDDATA]; /* drive-type specific information */
#define NSPARE 5
__u32 d_spare[NSPARE]; /* reserved for future use */
__le32 d_magic2; /* the magic number (again) */
__le16 d_checksum; /* xor of data incl. partitions */
/* filesystem and partition information: */
__le16 d_npartitions; /* number of partitions in following */
__le32 d_bbsize; /* size of boot area at sn0, bytes */
__le32 d_sbsize; /* max size of fs superblock, bytes */
struct bsd_partition { /* the partition table */
__le32 p_size; /* number of sectors in partition */
__le32 p_offset; /* starting sector */
__le32 p_fsize; /* filesystem basic fragment size */
__u8 p_fstype; /* filesystem type, see below */
__u8 p_frag; /* filesystem fragments per block */
__le16 p_cpg; /* filesystem cylinders per group */
} d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
};
#if defined(CONFIG_BSD_DISKLABEL)
/*
* Create devices for BSD partitions listed in a disklabel, under a
@ -349,6 +432,51 @@ static void parse_openbsd(struct parsed_partitions *state,
#endif
}
#define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */
#define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */
#define UNIXWARE_NUMSLICE 16
#define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */
struct unixware_slice {
__le16 s_label; /* label */
__le16 s_flags; /* permission flags */
__le32 start_sect; /* starting sector */
__le32 nr_sects; /* number of sectors in slice */
};
struct unixware_disklabel {
__le32 d_type; /* drive type */
__le32 d_magic; /* the magic number */
__le32 d_version; /* version number */
char d_serial[12]; /* serial number of the device */
__le32 d_ncylinders; /* # of data cylinders per device */
__le32 d_ntracks; /* # of tracks per cylinder */
__le32 d_nsectors; /* # of data sectors per track */
__le32 d_secsize; /* # of bytes per sector */
__le32 d_part_start; /* # of first sector of this partition*/
__le32 d_unknown1[12]; /* ? */
__le32 d_alt_tbl; /* byte offset of alternate table */
__le32 d_alt_len; /* byte length of alternate table */
__le32 d_phys_cyl; /* # of physical cylinders per device */
__le32 d_phys_trk; /* # of physical tracks per cylinder */
__le32 d_phys_sec; /* # of physical sectors per track */
__le32 d_phys_bytes; /* # of physical bytes per sector */
__le32 d_unknown2; /* ? */
__le32 d_unknown3; /* ? */
__le32 d_pad[8]; /* pad */
struct unixware_vtoc {
__le32 v_magic; /* the magic number */
__le32 v_version; /* version number */
char v_name[8]; /* volume name */
__le16 v_nslices; /* # of slices */
__le16 v_unknown1; /* ? */
__le32 v_reserved[10]; /* reserved */
struct unixware_slice
v_slice[UNIXWARE_NUMSLICE]; /* slice headers */
} vtoc;
}; /* 408 */
/*
* Create devices for Unixware partitions listed in a disklabel, under a
* dos-like partition. See parse_extended() for more information.
@ -392,6 +520,8 @@ static void parse_unixware(struct parsed_partitions *state,
#endif
}
#define MINIX_NR_SUBPARTITIONS 4
/*
* Minix 2.0.0/2.0.2 subpartition support.
* Anand Krishnamurthy <anandk@wiproge.med.ge.com>
@ -403,14 +533,14 @@ static void parse_minix(struct parsed_partitions *state,
#ifdef CONFIG_MINIX_SUBPARTITION
Sector sect;
unsigned char *data;
struct partition *p;
struct msdos_partition *p;
int i;
data = read_part_sector(state, offset, &sect);
if (!data)
return;
p = (struct partition *)(data + 0x1be);
p = (struct msdos_partition *)(data + 0x1be);
/* The first sector of a Minix partition can have either
* a secondary MBR describing its subpartitions, or
@ -454,7 +584,7 @@ int msdos_partition(struct parsed_partitions *state)
sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
Sector sect;
unsigned char *data;
struct partition *p;
struct msdos_partition *p;
struct fat_boot_sector *fb;
int slot;
u32 disksig;
@ -488,7 +618,7 @@ int msdos_partition(struct parsed_partitions *state)
* partition table. Reject this in case the boot indicator
* is not 0 or 0x80.
*/
p = (struct partition *) (data + 0x1be);
p = (struct msdos_partition *) (data + 0x1be);
for (slot = 1; slot <= 4; slot++, p++) {
if (p->boot_ind != 0 && p->boot_ind != 0x80) {
/*
@ -510,7 +640,7 @@ int msdos_partition(struct parsed_partitions *state)
}
#ifdef CONFIG_EFI_PARTITION
p = (struct partition *) (data + 0x1be);
p = (struct msdos_partition *) (data + 0x1be);
for (slot = 1 ; slot <= 4 ; slot++, p++) {
/* If this is an EFI GPT disk, msdos should ignore it. */
if (SYS_IND(p) == EFI_PMBR_OSTYPE_EFI_GPT) {
@ -519,7 +649,7 @@ int msdos_partition(struct parsed_partitions *state)
}
}
#endif
p = (struct partition *) (data + 0x1be);
p = (struct msdos_partition *) (data + 0x1be);
disksig = le32_to_cpup((__le32 *)(data + 0x1b8));
@ -566,7 +696,7 @@ int msdos_partition(struct parsed_partitions *state)
strlcat(state->pp_buf, "\n", PAGE_SIZE);
/* second pass - output for each on a separate line */
p = (struct partition *) (0x1be + data);
p = (struct msdos_partition *) (0x1be + data);
for (slot = 1 ; slot <= 4 ; slot++, p++) {
unsigned char id = SYS_IND(p);
int n;

9
block/partitions/msdos.h
View File

@ -1,9 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* fs/partitions/msdos.h
*/
#define MSDOS_LABEL_MAGIC 0xAA55
int msdos_partition(struct parsed_partitions *state);

2
block/partitions/osf.c
View File

@ -9,9 +9,9 @@
*/
#include "check.h"
#include "osf.h"
#define MAX_OSF_PARTITIONS 18
#define DISKLABELMAGIC (0x82564557UL)
int osf_partition(struct parsed_partitions *state)
{

8
block/partitions/osf.h
View File

@ -1,8 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* fs/partitions/osf.h
*/
#define DISKLABELMAGIC (0x82564557UL)
int osf_partition(struct parsed_partitions *state);

7
block/partitions/sgi.c
View File

@ -6,7 +6,12 @@
*/
#include "check.h"
#include "sgi.h"
#define SGI_LABEL_MAGIC 0x0be5a941
enum {
LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */
};
struct sgi_disklabel {
__be32 magic_mushroom; /* Big fat spliff... */

9
block/partitions/sgi.h
View File

@ -1,9 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* fs/partitions/sgi.h
*/
extern int sgi_partition(struct parsed_partitions *state);
#define SGI_LABEL_MAGIC 0x0be5a941

9
block/partitions/sun.c
View File

@ -9,7 +9,14 @@
*/
#include "check.h"
#include "sun.h"
#define SUN_LABEL_MAGIC 0xDABE
#define SUN_VTOC_SANITY 0x600DDEEE
enum {
SUN_WHOLE_DISK = 5,
LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */
};
int sun_partition(struct parsed_partitions *state)
{

9
block/partitions/sun.h
View File

@ -1,9 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* fs/partitions/sun.h
*/
#define SUN_LABEL_MAGIC 0xDABE
#define SUN_VTOC_SANITY 0x600DDEEE
int sun_partition(struct parsed_partitions *state);

1
block/partitions/sysv68.c
View File

@ -6,7 +6,6 @@
*/
#include "check.h"
#include "sysv68.h"
/*
* Volume ID structure: on first 256-bytes sector of disk

2
block/partitions/sysv68.h
View File

@ -1,2 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
extern int sysv68_partition(struct parsed_partitions *state);

1
block/partitions/ultrix.c
View File

@ -8,7 +8,6 @@
*/
#include "check.h"
#include "ultrix.h"
int ultrix_partition(struct parsed_partitions *state)
{

6
block/partitions/ultrix.h
View File

@ -1,6 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* fs/partitions/ultrix.h
*/
int ultrix_partition(struct parsed_partitions *state);

2
block/sed-opal.c
View File

@ -1056,7 +1056,7 @@ static int start_opal_session_cont(struct opal_dev *dev)
hsn = response_get_u64(&dev->parsed, 4);
tsn = response_get_u64(&dev->parsed, 5);
if (hsn == 0 && tsn == 0) {
if (hsn != GENERIC_HOST_SESSION_NUM || tsn < FIRST_TPER_SESSION_NUM) {
pr_debug("Couldn't authenticate session\n");
return -EPERM;
}

4
drivers/block/brd.c
View File

@ -381,12 +381,10 @@ static struct brd_device *brd_alloc(int i)
spin_lock_init(&brd->brd_lock);
INIT_RADIX_TREE(&brd->brd_pages, GFP_ATOMIC);
brd->brd_queue = blk_alloc_queue(GFP_KERNEL);
brd->brd_queue = blk_alloc_queue(brd_make_request, NUMA_NO_NODE);
if (!brd->brd_queue)
goto out_free_dev;
blk_queue_make_request(brd->brd_queue, brd_make_request);
/* This is so fdisk will align partitions on 4k, because of
* direct_access API needing 4k alignment, returning a PFN
* (This is only a problem on very small devices <= 4M,

3
drivers/block/drbd/drbd_main.c
View File

@ -2801,7 +2801,7 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
drbd_init_set_defaults(device);
q = blk_alloc_queue_node(GFP_KERNEL, NUMA_NO_NODE);
q = blk_alloc_queue(drbd_make_request, NUMA_NO_NODE);
if (!q)
goto out_no_q;
device->rq_queue = q;
@ -2828,7 +2828,6 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
q->backing_dev_info->congested_fn = drbd_congested;
q->backing_dev_info->congested_data = device;
blk_queue_make_request(q, drbd_make_request);
blk_queue_write_cache(q, true, true);
/* Setting the max_hw_sectors to an odd value of 8kibyte here
This triggers a max_bio_size message upon first attach or connect */

1
drivers/block/drbd/drbd_receiver.c
View File

@ -33,6 +33,7 @@
#include <linux/random.h>
#include <linux/string.h>
#include <linux/scatterlist.h>
#include <linux/part_stat.h>
#include "drbd_int.h"
#include "drbd_protocol.h"
#include "drbd_req.h"

1
drivers/block/drbd/drbd_worker.c
View File

@ -22,6 +22,7 @@
#include <linux/random.h>
#include <linux/string.h>
#include <linux/scatterlist.h>
#include <linux/part_stat.h>
#include "drbd_int.h"
#include "drbd_protocol.h"

106
drivers/block/null_blk_main.c
View File

@ -23,6 +23,7 @@
#ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION
static DECLARE_FAULT_ATTR(null_timeout_attr);
static DECLARE_FAULT_ATTR(null_requeue_attr);
static DECLARE_FAULT_ATTR(null_init_hctx_attr);
#endif
static inline u64 mb_per_tick(int mbps)
@ -101,6 +102,9 @@ module_param_string(timeout, g_timeout_str, sizeof(g_timeout_str), 0444);
static char g_requeue_str[80];
module_param_string(requeue, g_requeue_str, sizeof(g_requeue_str), 0444);
static char g_init_hctx_str[80];
module_param_string(init_hctx, g_init_hctx_str, sizeof(g_init_hctx_str), 0444);
#endif
static int g_queue_mode = NULL_Q_MQ;
@ -276,7 +280,7 @@ nullb_device_##NAME##_store(struct config_item *item, const char *page, \
{ \
int (*apply_fn)(struct nullb_device *dev, TYPE new_value) = APPLY;\
struct nullb_device *dev = to_nullb_device(item); \
TYPE uninitialized_var(new_value); \
TYPE new_value = 0; \
int ret; \
\
ret = nullb_device_##TYPE##_attr_store(&new_value, page, count);\
@ -302,6 +306,12 @@ static int nullb_apply_submit_queues(struct nullb_device *dev,
if (!nullb)
return 0;
/*
* Make sure that null_init_hctx() does not access nullb->queues[] past
* the end of that array.
*/
if (submit_queues > nr_cpu_ids)
return -EINVAL;
set = nullb->tag_set;
blk_mq_update_nr_hw_queues(set, submit_queues);
return set->nr_hw_queues == submit_queues ? 0 : -ENOMEM;
@ -1408,12 +1418,6 @@ static blk_status_t null_queue_rq(struct blk_mq_hw_ctx *hctx,
return null_handle_cmd(cmd, sector, nr_sectors, req_op(bd->rq));
}
static const struct blk_mq_ops null_mq_ops = {
.queue_rq = null_queue_rq,
.complete = null_complete_rq,
.timeout = null_timeout_rq,
};
static void cleanup_queue(struct nullb_queue *nq)
{
kfree(nq->tag_map);
@ -1430,9 +1434,56 @@ static void cleanup_queues(struct nullb *nullb)
kfree(nullb->queues);
}
static void null_exit_hctx(struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx)
{
struct nullb_queue *nq = hctx->driver_data;
struct nullb *nullb = nq->dev->nullb;
nullb->nr_queues--;
}
static void null_init_queue(struct nullb *nullb, struct nullb_queue *nq)
{
init_waitqueue_head(&nq->wait);
nq->queue_depth = nullb->queue_depth;
nq->dev = nullb->dev;
}
static int null_init_hctx(struct blk_mq_hw_ctx *hctx, void *driver_data,
unsigned int hctx_idx)
{
struct nullb *nullb = hctx->queue->queuedata;
struct nullb_queue *nq;
#ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION
if (g_init_hctx_str[0] && should_fail(&null_init_hctx_attr, 1))
return -EFAULT;
#endif
nq = &nullb->queues[hctx_idx];
hctx->driver_data = nq;
null_init_queue(nullb, nq);
nullb->nr_queues++;
return 0;
}
static const struct blk_mq_ops null_mq_ops = {
.queue_rq = null_queue_rq,
.complete = null_complete_rq,
.timeout = null_timeout_rq,
.init_hctx = null_init_hctx,
.exit_hctx = null_exit_hctx,
};
static void null_del_dev(struct nullb *nullb)
{
struct nullb_device *dev = nullb->dev;
struct nullb_device *dev;
if (!nullb)
return;
dev = nullb->dev;
ida_simple_remove(&nullb_indexes, nullb->index);
@ -1473,33 +1524,6 @@ static const struct block_device_operations null_ops = {
.report_zones = null_report_zones,
};
static void null_init_queue(struct nullb *nullb, struct nullb_queue *nq)
{
BUG_ON(!nullb);
BUG_ON(!nq);
init_waitqueue_head(&nq->wait);
nq->queue_depth = nullb->queue_depth;
nq->dev = nullb->dev;
}
static void null_init_queues(struct nullb *nullb)
{
struct request_queue *q = nullb->q;
struct blk_mq_hw_ctx *hctx;
struct nullb_queue *nq;
int i;
queue_for_each_hw_ctx(q, hctx, i) {
if (!hctx->nr_ctx || !hctx->tags)
continue;
nq = &nullb->queues[i];
hctx->driver_data = nq;
null_init_queue(nullb, nq);
nullb->nr_queues++;
}
}
static int setup_commands(struct nullb_queue *nq)
{
struct nullb_cmd *cmd;
@ -1526,8 +1550,7 @@ static int setup_commands(struct nullb_queue *nq)
static int setup_queues(struct nullb *nullb)
{
nullb->queues = kcalloc(nullb->dev->submit_queues,
sizeof(struct nullb_queue),
nullb->queues = kcalloc(nr_cpu_ids, sizeof(struct nullb_queue),
GFP_KERNEL);
if (!nullb->queues)
return -ENOMEM;
@ -1669,6 +1692,8 @@ static bool null_setup_fault(void)
return false;
if (!__null_setup_fault(&null_requeue_attr, g_requeue_str))
return false;
if (!__null_setup_fault(&null_init_hctx_attr, g_init_hctx_str))
return false;
#endif
return true;
}
@ -1712,19 +1737,17 @@ static int null_add_dev(struct nullb_device *dev)
goto out_cleanup_queues;
nullb->tag_set->timeout = 5 * HZ;
nullb->q = blk_mq_init_queue(nullb->tag_set);
nullb->q = blk_mq_init_queue_data(nullb->tag_set, nullb);
if (IS_ERR(nullb->q)) {
rv = -ENOMEM;
goto out_cleanup_tags;
}
null_init_queues(nullb);
} else if (dev->queue_mode == NULL_Q_BIO) {
nullb->q = blk_alloc_queue_node(GFP_KERNEL, dev->home_node);
nullb->q = blk_alloc_queue(null_queue_bio, dev->home_node);
if (!nullb->q) {
rv = -ENOMEM;
goto out_cleanup_queues;
}
blk_queue_make_request(nullb->q, null_queue_bio);
rv = init_driver_queues(nullb);
if (rv)
goto out_cleanup_blk_queue;
@ -1788,6 +1811,7 @@ out_cleanup_queues:
cleanup_queues(nullb);
out_free_nullb:
kfree(nullb);
dev->nullb = NULL;
out:
return rv;
}

15
drivers/block/pktcdvd.c
View File

@ -2493,7 +2493,6 @@ static void pkt_init_queue(struct pktcdvd_device *pd)
{
struct request_queue *q = pd->disk->queue;
blk_queue_make_request(q, pkt_make_request);
blk_queue_logical_block_size(q, CD_FRAMESIZE);
blk_queue_max_hw_sectors(q, PACKET_MAX_SECTORS);
q->queuedata = pd;
@ -2679,6 +2678,11 @@ static unsigned int pkt_check_events(struct gendisk *disk,
return attached_disk->fops->check_events(attached_disk, clearing);
}
static char *pkt_devnode(struct gendisk *disk, umode_t *mode)
{
return kasprintf(GFP_KERNEL, "pktcdvd/%s", disk->disk_name);
}
static const struct block_device_operations pktcdvd_ops = {
.owner = THIS_MODULE,
.open = pkt_open,
@ -2686,13 +2690,9 @@ static const struct block_device_operations pktcdvd_ops = {
.ioctl = pkt_ioctl,
.compat_ioctl = blkdev_compat_ptr_ioctl,
.check_events = pkt_check_events,
.devnode = pkt_devnode,
};
static char *pktcdvd_devnode(struct gendisk *gd, umode_t *mode)
{
return kasprintf(GFP_KERNEL, "pktcdvd/%s", gd->disk_name);
}
/*
* Set up mapping from pktcdvd device to CD-ROM device.
*/
@ -2748,9 +2748,8 @@ static int pkt_setup_dev(dev_t dev, dev_t* pkt_dev)
disk->fops = &pktcdvd_ops;
disk->flags = GENHD_FL_REMOVABLE;
strcpy(disk->disk_name, pd->name);
disk->devnode = pktcdvd_devnode;
disk->private_data = pd;
disk->queue = blk_alloc_queue(GFP_KERNEL);
disk->queue = blk_alloc_queue(pkt_make_request, NUMA_NO_NODE);
if (!disk->queue)
goto out_mem2;

3
drivers/block/ps3vram.c
View File

@ -737,7 +737,7 @@ static int ps3vram_probe(struct ps3_system_bus_device *dev)
ps3vram_proc_init(dev);
queue = blk_alloc_queue(GFP_KERNEL);
queue = blk_alloc_queue(ps3vram_make_request, NUMA_NO_NODE);
if (!queue) {
dev_err(&dev->core, "blk_alloc_queue failed\n");
error = -ENOMEM;
@ -746,7 +746,6 @@ static int ps3vram_probe(struct ps3_system_bus_device *dev)
priv->queue = queue;
queue->queuedata = dev;
blk_queue_make_request(queue, ps3vram_make_request);
blk_queue_max_segments(queue, BLK_MAX_SEGMENTS);
blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);

3
drivers/block/rsxx/dev.c
View File

@ -248,7 +248,7 @@ int rsxx_setup_dev(struct rsxx_cardinfo *card)
return -ENOMEM;
}
card->queue = blk_alloc_queue(GFP_KERNEL);
card->queue = blk_alloc_queue(rsxx_make_request, NUMA_NO_NODE);
if (!card->queue) {
dev_err(CARD_TO_DEV(card), "Failed queue alloc\n");
unregister_blkdev(card->major, DRIVER_NAME);
@ -269,7 +269,6 @@ int rsxx_setup_dev(struct rsxx_cardinfo *card)
blk_queue_logical_block_size(card->queue, blk_size);
}
blk_queue_make_request(card->queue, rsxx_make_request);
blk_queue_max_hw_sectors(card->queue, blkdev_max_hw_sectors);
blk_queue_physical_block_size(card->queue, RSXX_HW_BLK_SIZE);

4
drivers/block/umem.c
View File

@ -885,11 +885,9 @@ static int mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
card->biotail = &card->bio;
spin_lock_init(&card->lock);
card->queue = blk_alloc_queue_node(GFP_KERNEL, NUMA_NO_NODE);
card->queue = blk_alloc_queue(mm_make_request, NUMA_NO_NODE);
if (!card->queue)
goto failed_alloc;
blk_queue_make_request(card->queue, mm_make_request);
card->queue->queuedata = card;
tasklet_init(&card->tasklet, process_page, (unsigned long)card);

5
drivers/block/virtio_blk.c
View File

@ -388,18 +388,15 @@ static void virtblk_update_capacity(struct virtio_blk *vblk, bool resize)
cap_str_10,
cap_str_2);
set_capacity(vblk->disk, capacity);
set_capacity_revalidate_and_notify(vblk->disk, capacity, true);
}
static void virtblk_config_changed_work(struct work_struct *work)
{
struct virtio_blk *vblk =
container_of(work, struct virtio_blk, config_work);
char *envp[] = { "RESIZE=1", NULL };
virtblk_update_capacity(vblk, true);
revalidate_disk(vblk->disk);
kobject_uevent_env(&disk_to_dev(vblk->disk)->kobj, KOBJ_CHANGE, envp);
}
static void virtblk_config_changed(struct virtio_device *vdev)

6
drivers/block/xen-blkfront.c
View File

@ -2338,7 +2338,6 @@ static void blkfront_connect(struct blkfront_info *info)
unsigned long sector_size;
unsigned int physical_sector_size;
unsigned int binfo;
char *envp[] = { "RESIZE=1", NULL };
int err, i;
struct blkfront_ring_info *rinfo;
@ -2354,10 +2353,7 @@ static void blkfront_connect(struct blkfront_info *info)
return;
printk(KERN_INFO "Setting capacity to %Lu\n",
sectors);
set_capacity(info->gd, sectors);
revalidate_disk(info->gd);
kobject_uevent_env(&disk_to_dev(info->gd)->kobj,
KOBJ_CHANGE, envp);
set_capacity_revalidate_and_notify(info->gd, sectors, true);
return;
case BLKIF_STATE_SUSPENDED:

5
drivers/block/zram/zram_drv.c
View File

@ -33,6 +33,7 @@
#include <linux/sysfs.h>
#include <linux/debugfs.h>
#include <linux/cpuhotplug.h>
#include <linux/part_stat.h>
#include "zram_drv.h"
@ -1894,7 +1895,7 @@ static int zram_add(void)
#ifdef CONFIG_ZRAM_WRITEBACK
spin_lock_init(&zram->wb_limit_lock);
#endif
queue = blk_alloc_queue(GFP_KERNEL);
queue = blk_alloc_queue(zram_make_request, NUMA_NO_NODE);
if (!queue) {
pr_err("Error allocating disk queue for device %d\n",
device_id);
@ -1902,8 +1903,6 @@ static int zram_add(void)
goto out_free_idr;
}
blk_queue_make_request(queue, zram_make_request);
/* gendisk structure */
zram->disk = alloc_disk(1);
if (!zram->disk) {

3
drivers/lightnvm/core.c
View File

@ -380,12 +380,11 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
goto err_dev;
}
tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
tqueue = blk_alloc_queue(tt->make_rq, dev->q->node);
if (!tqueue) {
ret = -ENOMEM;
goto err_disk;
}
blk_queue_make_request(tqueue, tt->make_rq);
strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name));
tdisk->flags = GENHD_FL_EXT_DEVT;

7
drivers/md/bcache/request.c
View File

@ -1161,8 +1161,7 @@ static void quit_max_writeback_rate(struct cache_set *c,
/* Cached devices - read & write stuff */
static blk_qc_t cached_dev_make_request(struct request_queue *q,
struct bio *bio)
blk_qc_t cached_dev_make_request(struct request_queue *q, struct bio *bio)
{
struct search *s;
struct bcache_device *d = bio->bi_disk->private_data;
@ -1266,7 +1265,6 @@ void bch_cached_dev_request_init(struct cached_dev *dc)
{
struct gendisk *g = dc->disk.disk;
g->queue->make_request_fn = cached_dev_make_request;
g->queue->backing_dev_info->congested_fn = cached_dev_congested;
dc->disk.cache_miss = cached_dev_cache_miss;
dc->disk.ioctl = cached_dev_ioctl;
@ -1301,8 +1299,7 @@ static void flash_dev_nodata(struct closure *cl)
continue_at(cl, search_free, NULL);
}
static blk_qc_t flash_dev_make_request(struct request_queue *q,
struct bio *bio)
blk_qc_t flash_dev_make_request(struct request_queue *q, struct bio *bio)
{
struct search *s;
struct closure *cl;

3
drivers/md/bcache/request.h
View File

@ -37,7 +37,10 @@ unsigned int bch_get_congested(const struct cache_set *c);
void bch_data_insert(struct closure *cl);
void bch_cached_dev_request_init(struct cached_dev *dc);
blk_qc_t cached_dev_make_request(struct request_queue *q, struct bio *bio);
void bch_flash_dev_request_init(struct bcache_device *d);
blk_qc_t flash_dev_make_request(struct request_queue *q, struct bio *bio);
extern struct kmem_cache *bch_search_cache;

11
drivers/md/bcache/super.c
View File

@ -816,7 +816,7 @@ static void bcache_device_free(struct bcache_device *d)
}
static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
sector_t sectors)
sector_t sectors, make_request_fn make_request_fn)
{
struct request_queue *q;
const size_t max_stripes = min_t(size_t, INT_MAX,
@ -866,11 +866,10 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
d->disk->fops = &bcache_ops;
d->disk->private_data = d;
q = blk_alloc_queue(GFP_KERNEL);
q = blk_alloc_queue(make_request_fn, NUMA_NO_NODE);
if (!q)
return -ENOMEM;
blk_queue_make_request(q, NULL);
d->disk->queue = q;
q->queuedata = d;
q->backing_dev_info->congested_data = d;
@ -1339,7 +1338,8 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size)
q->limits.raid_partial_stripes_expensive;
ret = bcache_device_init(&dc->disk, block_size,
dc->bdev->bd_part->nr_sects - dc->sb.data_offset);
dc->bdev->bd_part->nr_sects - dc->sb.data_offset,
cached_dev_make_request);
if (ret)
return ret;
@ -1451,7 +1451,8 @@ static int flash_dev_run(struct cache_set *c, struct uuid_entry *u)
kobject_init(&d->kobj, &bch_flash_dev_ktype);
if (bcache_device_init(d, block_bytes(c), u->sectors))
if (bcache_device_init(d, block_bytes(c), u->sectors,
flash_dev_make_request))
goto err;
bcache_device_attach(d, c, u - c->uuids);

10
drivers/md/dm.c
View File

@ -25,6 +25,7 @@
#include <linux/wait.h>
#include <linux/pr.h>
#include <linux/refcount.h>
#include <linux/part_stat.h>
#define DM_MSG_PREFIX "core"
@ -1938,16 +1939,15 @@ static struct mapped_device *alloc_dev(int minor)
INIT_LIST_HEAD(&md->table_devices);
spin_lock_init(&md->uevent_lock);
md->queue = blk_alloc_queue_node(GFP_KERNEL, numa_node_id);
if (!md->queue)
goto bad;
md->queue->queuedata = md;
/*
* default to bio-based required ->make_request_fn until DM
* table is loaded and md->type established. If request-based
* table is loaded: blk-mq will override accordingly.
*/
blk_queue_make_request(md->queue, dm_make_request);
md->queue = blk_alloc_queue(dm_make_request, numa_node_id);
if (!md->queue)
goto bad;
md->queue->queuedata = md;
md->disk = alloc_disk_node(1, md->numa_node_id);
if (!md->disk)

9
drivers/md/md.c
View File

@ -58,8 +58,10 @@
#include <linux/delay.h>
#include <linux/raid/md_p.h>
#include <linux/raid/md_u.h>
#include <linux/raid/detect.h>
#include <linux/slab.h>
#include <linux/percpu-refcount.h>
#include <linux/part_stat.h>
#include <trace/events/block.h>
#include "md.h"
@ -2491,12 +2493,12 @@ static int lock_rdev(struct md_rdev *rdev, dev_t dev, int shared)
{
int err = 0;
struct block_device *bdev;
char b[BDEVNAME_SIZE];
bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
shared ? (struct md_rdev *)lock_rdev : rdev);
if (IS_ERR(bdev)) {
pr_warn("md: could not open %s.\n", __bdevname(dev, b));
pr_warn("md: could not open device unknown-block(%u,%u).\n",
MAJOR(dev), MINOR(dev));
return PTR_ERR(bdev);
}
rdev->bdev = bdev;
@ -5621,12 +5623,11 @@ static int md_alloc(dev_t dev, char *name)
mddev->hold_active = UNTIL_STOP;
error = -ENOMEM;
mddev->queue = blk_alloc_queue(GFP_KERNEL);
mddev->queue = blk_alloc_queue(md_make_request, NUMA_NO_NODE);
if (!mddev->queue)
goto abort;
mddev->queue->queuedata = mddev;
blk_queue_make_request(mddev->queue, md_make_request);
blk_set_stacking_limits(&mddev->queue->limits);
disk = alloc_disk(1 << shift);

3
drivers/nvdimm/blk.c
View File

@ -249,13 +249,12 @@ static int nsblk_attach_disk(struct nd_namespace_blk *nsblk)
internal_nlba = div_u64(nsblk->size, nsblk_internal_lbasize(nsblk));
available_disk_size = internal_nlba * nsblk_sector_size(nsblk);
q = blk_alloc_queue(GFP_KERNEL);
q = blk_alloc_queue(nd_blk_make_request, NUMA_NO_NODE);
if (!q)
return -ENOMEM;
if (devm_add_action_or_reset(dev, nd_blk_release_queue, q))
return -ENOMEM;
blk_queue_make_request(q, nd_blk_make_request);
blk_queue_max_hw_sectors(q, UINT_MAX);
blk_queue_logical_block_size(q, nsblk_sector_size(nsblk));
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);

3
drivers/nvdimm/btt.c
View File

@ -1521,7 +1521,7 @@ static int btt_blk_init(struct btt *btt)
struct nd_namespace_common *ndns = nd_btt->ndns;
/* create a new disk and request queue for btt */
btt->btt_queue = blk_alloc_queue(GFP_KERNEL);
btt->btt_queue = blk_alloc_queue(btt_make_request, NUMA_NO_NODE);
if (!btt->btt_queue)
return -ENOMEM;
@ -1540,7 +1540,6 @@ static int btt_blk_init(struct btt *btt)
btt->btt_disk->queue->backing_dev_info->capabilities |=
BDI_CAP_SYNCHRONOUS_IO;
blk_queue_make_request(btt->btt_queue, btt_make_request);
blk_queue_logical_block_size(btt->btt_queue, btt->sector_size);
blk_queue_max_hw_sectors(btt->btt_queue, UINT_MAX);
blk_queue_flag_set(QUEUE_FLAG_NONROT, btt->btt_queue);

3
drivers/nvdimm/pmem.c
View File

@ -395,7 +395,7 @@ static int pmem_attach_disk(struct device *dev,
return -EBUSY;
}
q = blk_alloc_queue_node(GFP_KERNEL, dev_to_node(dev));
q = blk_alloc_queue(pmem_make_request, dev_to_node(dev));
if (!q)
return -ENOMEM;
@ -433,7 +433,6 @@ static int pmem_attach_disk(struct device *dev,
pmem->virt_addr = addr;
blk_queue_write_cache(q, true, fua);
blk_queue_make_request(q, pmem_make_request);
blk_queue_physical_block_size(q, PAGE_SIZE);
blk_queue_logical_block_size(q, pmem_sector_size(ndns));
blk_queue_max_hw_sectors(q, UINT_MAX);

2
drivers/nvme/host/core.c
View File

@ -1810,7 +1810,7 @@ static void nvme_update_disk_info(struct gendisk *disk,
ns->lba_shift > PAGE_SHIFT)
capacity = 0;
set_capacity(disk, capacity);
set_capacity_revalidate_and_notify(disk, capacity, false);
nvme_config_discard(disk, ns);
nvme_config_write_zeroes(disk, ns);

3
drivers/nvme/host/multipath.c
View File

@ -377,11 +377,10 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head)
if (!(ctrl->subsys->cmic & (1 << 1)) || !multipath)
return 0;
q = blk_alloc_queue_node(GFP_KERNEL, ctrl->numa_node);
q = blk_alloc_queue(nvme_ns_head_make_request, ctrl->numa_node);
if (!q)
goto out;
q->queuedata = head;
blk_queue_make_request(q, nvme_ns_head_make_request);
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
/* set to a default value for 512 until disk is validated */
blk_queue_logical_block_size(q, 512);

1
drivers/nvme/target/admin-cmd.c
View File

@ -6,6 +6,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/rculist.h>
#include <linux/part_stat.h>
#include <generated/utsrelease.h>
#include <asm/unaligned.h>

4
drivers/s390/block/dcssblk.c
View File

@ -636,10 +636,10 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
}
dev_info->gd->major = dcssblk_major;
dev_info->gd->fops = &dcssblk_devops;
dev_info->dcssblk_queue = blk_alloc_queue(GFP_KERNEL);
dev_info->dcssblk_queue =
blk_alloc_queue(dcssblk_make_request, NUMA_NO_NODE);
dev_info->gd->queue = dev_info->dcssblk_queue;
dev_info->gd->private_data = dev_info;
blk_queue_make_request(dev_info->dcssblk_queue, dcssblk_make_request);
blk_queue_logical_block_size(dev_info->dcssblk_queue, 4096);
blk_queue_flag_set(QUEUE_FLAG_DAX, dev_info->dcssblk_queue);

4
drivers/s390/block/xpram.c
View File

@ -343,14 +343,14 @@ static int __init xpram_setup_blkdev(void)
xpram_disks[i] = alloc_disk(1);
if (!xpram_disks[i])
goto out;
xpram_queues[i] = blk_alloc_queue(GFP_KERNEL);
xpram_queues[i] = blk_alloc_queue(xpram_make_request,
NUMA_NO_NODE);
if (!xpram_queues[i]) {
put_disk(xpram_disks[i]);
goto out;
}
blk_queue_flag_set(QUEUE_FLAG_NONROT, xpram_queues[i]);
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, xpram_queues[i]);
blk_queue_make_request(xpram_queues[i], xpram_make_request);
blk_queue_logical_block_size(xpram_queues[i], 4096);
}

8
drivers/scsi/BusLogic.c
View File

@ -36,6 +36,7 @@
#include <linux/jiffies.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/msdos_partition.h>
#include <scsi/scsicam.h>
#include <asm/dma.h>
@ -3410,9 +3411,10 @@ static int blogic_diskparam(struct scsi_device *sdev, struct block_device *dev,
a partition table entry whose end_head matches one of the
standard BusLogic geometry translations (64/32, 128/32, or 255/63).
*/
if (*(unsigned short *) (buf + 64) == 0xAA55) {
struct partition *part1_entry = (struct partition *) buf;
struct partition *part_entry = part1_entry;
if (*(unsigned short *) (buf + 64) == MSDOS_LABEL_MAGIC) {
struct msdos_partition *part1_entry =
(struct msdos_partition *)buf;
struct msdos_partition *part_entry = part1_entry;
int saved_cyl = diskparam->cylinders, part_no;
unsigned char part_end_head = 0, part_end_sector = 0;

7
drivers/scsi/aacraid/linit.c
View File

@ -33,6 +33,7 @@
#include <linux/syscalls.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/msdos_partition.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@ -328,9 +329,9 @@ static int aac_biosparm(struct scsi_device *sdev, struct block_device *bdev,
buf = scsi_bios_ptable(bdev);
if (!buf)
return 0;
if(*(__le16 *)(buf + 0x40) == cpu_to_le16(0xaa55)) {
struct partition *first = (struct partition * )buf;
struct partition *entry = first;
if (*(__le16 *)(buf + 0x40) == cpu_to_le16(MSDOS_LABEL_MAGIC)) {
struct msdos_partition *first = (struct msdos_partition *)buf;
struct msdos_partition *entry = first;
int saved_cylinders = param->cylinders;
int num;
unsigned char end_head, end_sec;

13
drivers/scsi/aic7xxx/aic79xx_osm.c
View File

@ -723,24 +723,17 @@ static int
ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
uint8_t *bh;
int heads;
int sectors;
int cylinders;
int ret;
int extended;
struct ahd_softc *ahd;
ahd = *((struct ahd_softc **)sdev->host->hostdata);
bh = scsi_bios_ptable(bdev);
if (bh) {
ret = scsi_partsize(bh, capacity,
&geom[2], &geom[0], &geom[1]);
kfree(bh);
if (ret != -1)
return (ret);
}
if (scsi_partsize(bdev, capacity, geom))
return 0;
heads = 64;
sectors = 32;
cylinders = aic_sector_div(capacity, heads, sectors);

13
drivers/scsi/aic7xxx/aic7xxx_osm.c
View File

@ -695,11 +695,9 @@ static int
ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
uint8_t *bh;
int heads;
int sectors;
int cylinders;
int ret;
int extended;
struct ahc_softc *ahc;
u_int channel;
@ -707,14 +705,9 @@ ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
ahc = *((struct ahc_softc **)sdev->host->hostdata);
channel = sdev_channel(sdev);
bh = scsi_bios_ptable(bdev);
if (bh) {
ret = scsi_partsize(bh, capacity,
&geom[2], &geom[0], &geom[1]);
kfree(bh);
if (ret != -1)
return (ret);
}
if (scsi_partsize(bdev, capacity, geom))
return 0;
heads = 64;
sectors = 32;
cylinders = aic_sector_div(capacity, heads, sectors);

13
drivers/scsi/arcmsr/arcmsr_hba.c
View File

@ -353,16 +353,11 @@ static irqreturn_t arcmsr_do_interrupt(int irq, void *dev_id)
static int arcmsr_bios_param(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity, int *geom)
{
int ret, heads, sectors, cylinders, total_capacity;
unsigned char *buffer;/* return copy of block device's partition table */
int heads, sectors, cylinders, total_capacity;
if (scsi_partsize(bdev, capacity, geom))
return 0;
buffer = scsi_bios_ptable(bdev);
if (buffer) {
ret = scsi_partsize(buffer, capacity, &geom[2], &geom[0], &geom[1]);
kfree(buffer);
if (ret != -1)
return ret;
}
total_capacity = capacity;
heads = 64;
sectors = 32;

13
drivers/scsi/megaraid.c
View File

@ -2795,11 +2795,9 @@ megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
adapter_t *adapter;
unsigned char *bh;
int heads;
int sectors;
int cylinders;
int rval;
/* Get pointer to host config structure */
adapter = (adapter_t *)sdev->host->hostdata;
@ -2826,15 +2824,8 @@ megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
geom[2] = cylinders;
}
else {
bh = scsi_bios_ptable(bdev);
if( bh ) {
rval = scsi_partsize(bh, capacity,
&geom[2], &geom[0], &geom[1]);
kfree(bh);
if( rval != -1 )
return rval;
}
if (scsi_partsize(bdev, capacity, geom))
return 0;
dev_info(&adapter->dev->dev,
"invalid partition on this disk on channel %d\n",

5
drivers/scsi/scsi_debug.c
View File

@ -38,6 +38,7 @@
#include <linux/hrtimer.h>
#include <linux/uuid.h>
#include <linux/t10-pi.h>
#include <linux/msdos_partition.h>
#include <net/checksum.h>
@ -4146,7 +4147,7 @@ static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
static void __init sdebug_build_parts(unsigned char *ramp,
unsigned long store_size)
{
struct partition *pp;
struct msdos_partition *pp;
int starts[SDEBUG_MAX_PARTS + 2];
int sectors_per_part, num_sectors, k;
int heads_by_sects, start_sec, end_sec;
@ -4171,7 +4172,7 @@ static void __init sdebug_build_parts(unsigned char *ramp,
ramp[510] = 0x55; /* magic partition markings */
ramp[511] = 0xAA;
pp = (struct partition *)(ramp + 0x1be);
pp = (struct msdos_partition *)(ramp + 0x1be);
for (k = 0; starts[k + 1]; ++k, ++pp) {
start_sec = starts[k];
end_sec = starts[k + 1] - 1;

186
drivers/scsi/scsicam.c
View File

@ -17,14 +17,11 @@
#include <linux/genhd.h>
#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/msdos_partition.h>
#include <asm/unaligned.h>
#include <scsi/scsicam.h>
static int setsize(unsigned long capacity, unsigned int *cyls, unsigned int *hds,
unsigned int *secs);
/**
* scsi_bios_ptable - Read PC partition table out of first sector of device.
* @dev: from this device
@ -35,105 +32,48 @@ static int setsize(unsigned long capacity, unsigned int *cyls, unsigned int *hds
*/
unsigned char *scsi_bios_ptable(struct block_device *dev)
{
unsigned char *res = kmalloc(66, GFP_KERNEL);
if (res) {
struct block_device *bdev = dev->bd_contains;
Sector sect;
void *data = read_dev_sector(bdev, 0, &sect);
if (data) {
memcpy(res, data + 0x1be, 66);
put_dev_sector(sect);
} else {
kfree(res);
res = NULL;
}
}
struct address_space *mapping = dev->bd_contains->bd_inode->i_mapping;
unsigned char *res = NULL;
struct page *page;
page = read_mapping_page(mapping, 0, NULL);
if (IS_ERR(page))
return NULL;
if (!PageError(page))
res = kmemdup(page_address(page) + 0x1be, 66, GFP_KERNEL);
put_page(page);
return res;
}
EXPORT_SYMBOL(scsi_bios_ptable);
/**
* scsicam_bios_param - Determine geometry of a disk in cylinders/heads/sectors.
* @bdev: which device
* @capacity: size of the disk in sectors
* @ip: return value: ip[0]=heads, ip[1]=sectors, ip[2]=cylinders
*
* Description : determine the BIOS mapping/geometry used for a drive in a
* SCSI-CAM system, storing the results in ip as required
* by the HDIO_GETGEO ioctl().
*
* Returns : -1 on failure, 0 on success.
*/
int scsicam_bios_param(struct block_device *bdev, sector_t capacity, int *ip)
{
unsigned char *p;
u64 capacity64 = capacity; /* Suppress gcc warning */
int ret;
p = scsi_bios_ptable(bdev);
if (!p)
return -1;
/* try to infer mapping from partition table */
ret = scsi_partsize(p, (unsigned long)capacity, (unsigned int *)ip + 2,
(unsigned int *)ip + 0, (unsigned int *)ip + 1);
kfree(p);
if (ret == -1 && capacity64 < (1ULL << 32)) {
/* pick some standard mapping with at most 1024 cylinders,
and at most 62 sectors per track - this works up to
7905 MB */
ret = setsize((unsigned long)capacity, (unsigned int *)ip + 2,
(unsigned int *)ip + 0, (unsigned int *)ip + 1);
}
/* if something went wrong, then apparently we have to return
a geometry with more than 1024 cylinders */
if (ret || ip[0] > 255 || ip[1] > 63) {
if ((capacity >> 11) > 65534) {
ip[0] = 255;
ip[1] = 63;
} else {
ip[0] = 64;
ip[1] = 32;
}
if (capacity > 65535*63*255)
ip[2] = 65535;
else
ip[2] = (unsigned long)capacity / (ip[0] * ip[1]);
}
return 0;
}
EXPORT_SYMBOL(scsicam_bios_param);
/**
* scsi_partsize - Parse cylinders/heads/sectors from PC partition table
* @buf: partition table, see scsi_bios_ptable()
* @bdev: block device to parse
* @capacity: size of the disk in sectors
* @cyls: put cylinders here
* @hds: put heads here
* @secs: put sectors here
* @geom: output in form of [hds, cylinders, sectors]
*
* Determine the BIOS mapping/geometry used to create the partition
* table, storing the results in @cyls, @hds, and @secs
* table, storing the results in @geom.
*
* Returns: -1 on failure, 0 on success.
* Returns: %false on failure, %true on success.
*/
int scsi_partsize(unsigned char *buf, unsigned long capacity,
unsigned int *cyls, unsigned int *hds, unsigned int *secs)
bool scsi_partsize(struct block_device *bdev, sector_t capacity, int geom[3])
{
struct partition *p = (struct partition *)buf, *largest = NULL;
int i, largest_cyl;
int cyl, ext_cyl, end_head, end_cyl, end_sector;
unsigned int logical_end, physical_end, ext_physical_end;
struct msdos_partition *p, *largest = NULL;
void *buf;
int ret = false;
buf = scsi_bios_ptable(bdev);
if (!buf)
return false;
if (*(unsigned short *) (buf + 64) == 0xAA55) {
for (largest_cyl = -1, i = 0; i < 4; ++i, ++p) {
int largest_cyl = -1, i;
for (i = 0, p = buf; i < 4; i++, p++) {
if (!p->sys_ind)
continue;
#ifdef DEBUG
@ -153,7 +93,7 @@ int scsi_partsize(unsigned char *buf, unsigned long capacity,
end_sector = largest->end_sector & 0x3f;
if (end_head + 1 == 0 || end_sector == 0)
return -1;
goto out_free_buf;
#ifdef DEBUG
printk("scsicam_bios_param : end at h = %d, c = %d, s = %d\n",
@ -178,19 +118,24 @@ int scsi_partsize(unsigned char *buf, unsigned long capacity,
,logical_end, physical_end, ext_physical_end, ext_cyl);
#endif
if ((logical_end == physical_end) ||
(end_cyl == 1023 && ext_physical_end == logical_end)) {
*secs = end_sector;
*hds = end_head + 1;
*cyls = capacity / ((end_head + 1) * end_sector);
return 0;
if (logical_end == physical_end ||
(end_cyl == 1023 && ext_physical_end == logical_end)) {
geom[0] = end_head + 1;
geom[1] = end_sector;
geom[2] = (unsigned long)capacity /
((end_head + 1) * end_sector);
ret = true;
goto out_free_buf;
}
#ifdef DEBUG
printk("scsicam_bios_param : logical (%u) != physical (%u)\n",
logical_end, physical_end);
#endif
}
return -1;
out_free_buf:
kfree(buf);
return ret;
}
EXPORT_SYMBOL(scsi_partsize);
@ -258,3 +203,56 @@ static int setsize(unsigned long capacity, unsigned int *cyls, unsigned int *hds
*hds = (unsigned int) heads;
return (rv);
}
/**
* scsicam_bios_param - Determine geometry of a disk in cylinders/heads/sectors.
* @bdev: which device
* @capacity: size of the disk in sectors
* @ip: return value: ip[0]=heads, ip[1]=sectors, ip[2]=cylinders
*
* Description : determine the BIOS mapping/geometry used for a drive in a
* SCSI-CAM system, storing the results in ip as required
* by the HDIO_GETGEO ioctl().
*
* Returns : -1 on failure, 0 on success.
*/
int scsicam_bios_param(struct block_device *bdev, sector_t capacity, int *ip)
{
u64 capacity64 = capacity; /* Suppress gcc warning */
int ret = 0;
/* try to infer mapping from partition table */
if (scsi_partsize(bdev, capacity, ip))
return 0;
if (capacity64 < (1ULL << 32)) {
/*
* Pick some standard mapping with at most 1024 cylinders, and
* at most 62 sectors per track - this works up to 7905 MB.
*/
ret = setsize((unsigned long)capacity, (unsigned int *)ip + 2,
(unsigned int *)ip + 0, (unsigned int *)ip + 1);
}
/*
* If something went wrong, then apparently we have to return a geometry
* with more than 1024 cylinders.
*/
if (ret || ip[0] > 255 || ip[1] > 63) {
if ((capacity >> 11) > 65534) {
ip[0] = 255;
ip[1] = 63;
} else {
ip[0] = 64;
ip[1] = 32;
}
if (capacity > 65535*63*255)
ip[2] = 65535;
else
ip[2] = (unsigned long)capacity / (ip[0] * ip[1]);
}
return 0;
}
EXPORT_SYMBOL(scsicam_bios_param);

3
drivers/scsi/sd.c
View File

@ -3189,7 +3189,8 @@ static int sd_revalidate_disk(struct gendisk *disk)
sdkp->first_scan = 0;
set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity));
set_capacity_revalidate_and_notify(disk,
logical_to_sectors(sdp, sdkp->capacity), false);
sd_config_write_same(sdkp);
kfree(buffer);

20
fs/block_dev.c
View File

@ -1520,10 +1520,22 @@ rescan:
if (ret)
return ret;
if (invalidate)
set_capacity(disk, 0);
else if (disk->fops->revalidate_disk)
disk->fops->revalidate_disk(disk);
/*
* Historically we only set the capacity to zero for devices that
* support partitions (independ of actually having partitions created).
* Doing that is rather inconsistent, but changing it broke legacy
* udisks polling for legacy ide-cdrom devices. Use the crude check
* below to get the sane behavior for most device while not breaking
* userspace for this particular setup.
*/
if (invalidate) {
if (disk_part_scan_enabled(disk) ||
!(disk->flags & GENHD_FL_REMOVABLE))
set_capacity(disk, 0);
} else {
if (disk->fops->revalidate_disk)
disk->fops->revalidate_disk(disk);
}
check_disk_size_change(disk, bdev, !invalidate);

43
fs/buffer.c
View File

@ -3019,49 +3019,6 @@ static void end_bio_bh_io_sync(struct bio *bio)
bio_put(bio);
}
/*
* This allows us to do IO even on the odd last sectors
* of a device, even if the block size is some multiple
* of the physical sector size.
*
* We'll just truncate the bio to the size of the device,
* and clear the end of the buffer head manually.
*
* Truly out-of-range accesses will turn into actual IO
* errors, this only handles the "we need to be able to
* do IO at the final sector" case.
*/
void guard_bio_eod(struct bio *bio)
{
sector_t maxsector;
struct hd_struct *part;
rcu_read_lock();
part = __disk_get_part(bio->bi_disk, bio->bi_partno);
if (part)
maxsector = part_nr_sects_read(part);
else
maxsector = get_capacity(bio->bi_disk);
rcu_read_unlock();
if (!maxsector)
return;
/*
* If the *whole* IO is past the end of the device,
* let it through, and the IO layer will turn it into
* an EIO.
*/
if (unlikely(bio->bi_iter.bi_sector >= maxsector))
return;
maxsector -= bio->bi_iter.bi_sector;
if (likely((bio->bi_iter.bi_size >> 9) <= maxsector))
return;
bio_truncate(bio, maxsector << 9);
}
static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
enum rw_hint write_hint, struct writeback_control *wbc)
{

8
fs/ext4/super.c
View File

@ -43,7 +43,7 @@
#include <linux/uaccess.h>
#include <linux/iversion.h>
#include <linux/unicode.h>
#include <linux/part_stat.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
@ -927,7 +927,6 @@ void ext4_update_dynamic_rev(struct super_block *sb)
static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb)
{
struct block_device *bdev;
char b[BDEVNAME_SIZE];
bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb);
if (IS_ERR(bdev))
@ -935,8 +934,9 @@ static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb)
return bdev;
fail:
ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld",
__bdevname(dev, b), PTR_ERR(bdev));
ext4_msg(sb, KERN_ERR,
"failed to open journal device unknown-block(%u,%u) %ld",
MAJOR(dev), MINOR(dev), PTR_ERR(bdev));
return NULL;
}

1
fs/ext4/sysfs.c
View File

@ -13,6 +13,7 @@
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/part_stat.h>
#include "ext4.h"
#include "ext4_jbd2.h"

1
fs/f2fs/f2fs.h
View File

@ -22,6 +22,7 @@
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/quotaops.h>
#include <linux/part_stat.h>
#include <crypto/hash.h>
#include <linux/fscrypt.h>

1
fs/f2fs/super.c
View File

@ -24,6 +24,7 @@
#include <linux/sysfs.h>
#include <linux/quota.h>
#include <linux/unicode.h>
#include <linux/part_stat.h>
#include "f2fs.h"
#include "node.h"

1
fs/internal.h
View File

@ -38,7 +38,6 @@ static inline int __sync_blockdev(struct block_device *bdev, int wait)
/*
* buffer.c
*/
extern void guard_bio_eod(struct bio *bio);
extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
get_block_t *get_block, struct iomap *iomap);

5
fs/reiserfs/journal.c
View File

@ -2599,7 +2599,6 @@ static int journal_init_dev(struct super_block *super,
int result;
dev_t jdev;
fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
char b[BDEVNAME_SIZE];
result = 0;
@ -2621,8 +2620,8 @@ static int journal_init_dev(struct super_block *super,
result = PTR_ERR(journal->j_dev_bd);
journal->j_dev_bd = NULL;
reiserfs_warning(super, "sh-458",
"cannot init journal device '%s': %i",
__bdevname(jdev, b), result);
"cannot init journal device unknown-block(%u,%u): %i",
MAJOR(jdev), MINOR(jdev), result);
return result;
} else if (jdev != super->s_dev)
set_blocksize(journal->j_dev_bd, super->s_blocksize);

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