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block: Use accessor functions for queue limits

Browse source 
Convert all external users of queue limits to using wrapper functions
instead of poking the request queue variables directly.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Martin K. Petersen 2009-05-22 17:17:50 -04:00 committed by Jens Axboe
parent e1defc4ff0
commit ae03bf639a
25 changed files with 147 additions and 97 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
block/blk-barrier.c
View file

@ -388,10 +388,10 @@ int blkdev_issue_discard(struct block_device *bdev,
bio->bi_sector = sector;
if (nr_sects > q->max_hw_sectors) {
bio->bi_size = q->max_hw_sectors << 9;
nr_sects -= q->max_hw_sectors;
sector += q->max_hw_sectors;
if (nr_sects > queue_max_hw_sectors(q)) {
bio->bi_size = queue_max_hw_sectors(q) << 9;
nr_sects -= queue_max_hw_sectors(q);
sector += queue_max_hw_sectors(q);
} else {
bio->bi_size = nr_sects << 9;
nr_sects = 0;

16
block/blk-core.c
View file

@ -1437,11 +1437,11 @@ static inline void __generic_make_request(struct bio *bio)
goto end_io;
}
if (unlikely(nr_sectors > q->max_hw_sectors)) {
if (unlikely(nr_sectors > queue_max_hw_sectors(q))) {
printk(KERN_ERR "bio too big device %s (%u > %u)\n",
bdevname(bio->bi_bdev, b),
bio_sectors(bio),
q->max_hw_sectors);
bdevname(bio->bi_bdev, b),
bio_sectors(bio),
queue_max_hw_sectors(q));
goto end_io;
}
@ -1608,8 +1608,8 @@ EXPORT_SYMBOL(submit_bio);
*/
int blk_rq_check_limits(struct request_queue *q, struct request *rq)
{
if (blk_rq_sectors(rq) > q->max_sectors ||
blk_rq_bytes(rq) > q->max_hw_sectors << 9) {
if (blk_rq_sectors(rq) > queue_max_sectors(q) ||
blk_rq_bytes(rq) > queue_max_hw_sectors(q) << 9) {
printk(KERN_ERR "%s: over max size limit.\n", __func__);
return -EIO;
}
@ -1621,8 +1621,8 @@ int blk_rq_check_limits(struct request_queue *q, struct request *rq)
* limitation.
*/
blk_recalc_rq_segments(rq);
if (rq->nr_phys_segments > q->max_phys_segments ||
rq->nr_phys_segments > q->max_hw_segments) {
if (rq->nr_phys_segments > queue_max_phys_segments(q) ||
rq->nr_phys_segments > queue_max_hw_segments(q)) {
printk(KERN_ERR "%s: over max segments limit.\n", __func__);
return -EIO;
}

4
block/blk-map.c
View file

@ -115,7 +115,7 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq,
struct bio *bio = NULL;
int ret;
if (len > (q->max_hw_sectors << 9))
if (len > (queue_max_hw_sectors(q) << 9))
return -EINVAL;
if (!len)
return -EINVAL;
@ -292,7 +292,7 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
struct bio *bio;
int ret;
if (len > (q->max_hw_sectors << 9))
if (len > (queue_max_hw_sectors(q) << 9))
return -EINVAL;
if (!len || !kbuf)
return -EINVAL;

27
block/blk-merge.c
View file

@ -32,11 +32,12 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
* never considered part of another segment, since that
* might change with the bounce page.
*/
high = page_to_pfn(bv->bv_page) > q->bounce_pfn;
high = page_to_pfn(bv->bv_page) > queue_bounce_pfn(q);
if (high || highprv)
goto new_segment;
if (cluster) {
if (seg_size + bv->bv_len > q->max_segment_size)
if (seg_size + bv->bv_len
> queue_max_segment_size(q))
goto new_segment;
if (!BIOVEC_PHYS_MERGEABLE(bvprv, bv))
goto new_segment;
@ -91,7 +92,7 @@ static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
return 0;
if (bio->bi_seg_back_size + nxt->bi_seg_front_size >
q->max_segment_size)
queue_max_segment_size(q))
return 0;
if (!bio_has_data(bio))
@ -134,7 +135,7 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq,
int nbytes = bvec->bv_len;
if (bvprv && cluster) {
if (sg->length + nbytes > q->max_segment_size)
if (sg->length + nbytes > queue_max_segment_size(q))
goto new_segment;
if (!BIOVEC_PHYS_MERGEABLE(bvprv, bvec))
@ -205,8 +206,8 @@ static inline int ll_new_hw_segment(struct request_queue *q,
{
int nr_phys_segs = bio_phys_segments(q, bio);
if (req->nr_phys_segments + nr_phys_segs > q->max_hw_segments
|| req->nr_phys_segments + nr_phys_segs > q->max_phys_segments) {
if (req->nr_phys_segments + nr_phys_segs > queue_max_hw_segments(q) ||
req->nr_phys_segments + nr_phys_segs > queue_max_phys_segments(q)) {
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
@ -227,9 +228,9 @@ int ll_back_merge_fn(struct request_queue *q, struct request *req,
unsigned short max_sectors;
if (unlikely(blk_pc_request(req)))
max_sectors = q->max_hw_sectors;
max_sectors = queue_max_hw_sectors(q);
else
max_sectors = q->max_sectors;
max_sectors = queue_max_sectors(q);
if (blk_rq_sectors(req) + bio_sectors(bio) > max_sectors) {
req->cmd_flags |= REQ_NOMERGE;
@ -251,9 +252,9 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req,
unsigned short max_sectors;
if (unlikely(blk_pc_request(req)))
max_sectors = q->max_hw_sectors;
max_sectors = queue_max_hw_sectors(q);
else
max_sectors = q->max_sectors;
max_sectors = queue_max_sectors(q);
if (blk_rq_sectors(req) + bio_sectors(bio) > max_sectors) {
@ -287,7 +288,7 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
/*
* Will it become too large?
*/
if ((blk_rq_sectors(req) + blk_rq_sectors(next)) > q->max_sectors)
if ((blk_rq_sectors(req) + blk_rq_sectors(next)) > queue_max_sectors(q))
return 0;
total_phys_segments = req->nr_phys_segments + next->nr_phys_segments;
@ -299,10 +300,10 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
total_phys_segments--;
}
if (total_phys_segments > q->max_phys_segments)
if (total_phys_segments > queue_max_phys_segments(q))
return 0;
if (total_phys_segments > q->max_hw_segments)
if (total_phys_segments > queue_max_hw_segments(q))
return 0;
/* Merge is OK... */

15
block/blk-settings.c
View file

@ -219,6 +219,15 @@ void blk_queue_max_sectors(struct request_queue *q, unsigned int max_sectors)
}
EXPORT_SYMBOL(blk_queue_max_sectors);
void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_sectors)
{
if (BLK_DEF_MAX_SECTORS > max_sectors)
q->max_hw_sectors = BLK_DEF_MAX_SECTORS;
else
q->max_hw_sectors = max_sectors;
}
EXPORT_SYMBOL(blk_queue_max_hw_sectors);
/**
* blk_queue_max_phys_segments - set max phys segments for a request for this queue
* @q: the request queue for the device
@ -395,11 +404,11 @@ int blk_queue_dma_drain(struct request_queue *q,
dma_drain_needed_fn *dma_drain_needed,
void *buf, unsigned int size)
{
if (q->max_hw_segments < 2 || q->max_phys_segments < 2)
if (queue_max_hw_segments(q) < 2 || queue_max_phys_segments(q) < 2)
return -EINVAL;
/* make room for appending the drain */
--q->max_hw_segments;
--q->max_phys_segments;
blk_queue_max_hw_segments(q, queue_max_hw_segments(q) - 1);
blk_queue_max_phys_segments(q, queue_max_phys_segments(q) - 1);
q->dma_drain_needed = dma_drain_needed;
q->dma_drain_buffer = buf;
q->dma_drain_size = size;

8
block/blk-sysfs.c
View file

@ -95,7 +95,7 @@ queue_ra_store(struct request_queue *q, const char *page, size_t count)
static ssize_t queue_max_sectors_show(struct request_queue *q, char *page)
{
int max_sectors_kb = q->max_sectors >> 1;
int max_sectors_kb = queue_max_sectors(q) >> 1;
return queue_var_show(max_sectors_kb, (page));
}
@ -109,7 +109,7 @@ static ssize_t
queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
{
unsigned long max_sectors_kb,
max_hw_sectors_kb = q->max_hw_sectors >> 1,
max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1,
page_kb = 1 << (PAGE_CACHE_SHIFT - 10);
ssize_t ret = queue_var_store(&max_sectors_kb, page, count);
@ -117,7 +117,7 @@ queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
return -EINVAL;
spin_lock_irq(q->queue_lock);
q->max_sectors = max_sectors_kb << 1;
blk_queue_max_sectors(q, max_sectors_kb << 1);
spin_unlock_irq(q->queue_lock);
return ret;
@ -125,7 +125,7 @@ queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page)
{
int max_hw_sectors_kb = q->max_hw_sectors >> 1;
int max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1;
return queue_var_show(max_hw_sectors_kb, (page));
}

2
block/compat_ioctl.c
View file

@ -766,7 +766,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
return compat_put_int(arg, bdev_logical_block_size(bdev));
case BLKSECTGET:
return compat_put_ushort(arg,
bdev_get_queue(bdev)->max_sectors);
queue_max_sectors(bdev_get_queue(bdev)));
case BLKRASET: /* compatible, but no compat_ptr (!) */
case BLKFRASET:
if (!capable(CAP_SYS_ADMIN))

10
block/ioctl.c
View file

@ -152,10 +152,10 @@ static int blk_ioctl_discard(struct block_device *bdev, uint64_t start,
bio->bi_private = &wait;
bio->bi_sector = start;
if (len > q->max_hw_sectors) {
bio->bi_size = q->max_hw_sectors << 9;
len -= q->max_hw_sectors;
start += q->max_hw_sectors;
if (len > queue_max_hw_sectors(q)) {
bio->bi_size = queue_max_hw_sectors(q) << 9;
len -= queue_max_hw_sectors(q);
start += queue_max_hw_sectors(q);
} else {
bio->bi_size = len << 9;
len = 0;
@ -313,7 +313,7 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
case BLKSSZGET: /* get block device hardware sector size */
return put_int(arg, bdev_logical_block_size(bdev));
case BLKSECTGET:
return put_ushort(arg, bdev_get_queue(bdev)->max_sectors);
return put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev)));
case BLKRASET:
case BLKFRASET:
if(!capable(CAP_SYS_ADMIN))

8
block/scsi_ioctl.c
View file

@ -75,7 +75,7 @@ static int sg_set_timeout(struct request_queue *q, int __user *p)
static int sg_get_reserved_size(struct request_queue *q, int __user *p)
{
unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
unsigned val = min(q->sg_reserved_size, queue_max_sectors(q) << 9);
return put_user(val, p);
}
@ -89,8 +89,8 @@ static int sg_set_reserved_size(struct request_queue *q, int __user *p)
if (size < 0)
return -EINVAL;
if (size > (q->max_sectors << 9))
size = q->max_sectors << 9;
if (size > (queue_max_sectors(q) << 9))
size = queue_max_sectors(q) << 9;
q->sg_reserved_size = size;
return 0;
@ -264,7 +264,7 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
if (hdr->cmd_len > BLK_MAX_CDB)
return -EINVAL;
if (hdr->dxfer_len > (q->max_hw_sectors << 9))
if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
return -EIO;
if (hdr->dxfer_len)

6
drivers/block/pktcdvd.c
View file

@ -991,13 +991,15 @@ static void pkt_iosched_process_queue(struct pktcdvd_device *pd)
*/
static int pkt_set_segment_merging(struct pktcdvd_device *pd, struct request_queue *q)
{
if ((pd->settings.size << 9) / CD_FRAMESIZE <= q->max_phys_segments) {
if ((pd->settings.size << 9) / CD_FRAMESIZE
<= queue_max_phys_segments(q)) {
/*
* The cdrom device can handle one segment/frame
*/
clear_bit(PACKET_MERGE_SEGS, &pd->flags);
return 0;
} else if ((pd->settings.size << 9) / PAGE_SIZE <= q->max_phys_segments) {
} else if ((pd->settings.size << 9) / PAGE_SIZE
<= queue_max_phys_segments(q)) {
/*
* We can handle this case at the expense of some extra memory
* copies during write operations

4
drivers/cdrom/cdrom.c
View file

@ -2101,8 +2101,8 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
nr = nframes;
if (cdi->cdda_method == CDDA_BPC_SINGLE)
nr = 1;
if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
len = nr * CD_FRAMESIZE_RAW;

28
drivers/md/dm-table.c
View file

@ -510,7 +510,7 @@ void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev)
* combine_restrictions_low()
*/
rs->max_sectors =
min_not_zero(rs->max_sectors, q->max_sectors);
min_not_zero(rs->max_sectors, queue_max_sectors(q));
/*
* Check if merge fn is supported.
@ -525,25 +525,25 @@ void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev)
rs->max_phys_segments =
min_not_zero(rs->max_phys_segments,
q->max_phys_segments);
queue_max_phys_segments(q));
rs->max_hw_segments =
min_not_zero(rs->max_hw_segments, q->max_hw_segments);
min_not_zero(rs->max_hw_segments, queue_max_hw_segments(q));
rs->logical_block_size = max(rs->logical_block_size,
queue_logical_block_size(q));
rs->max_segment_size =
min_not_zero(rs->max_segment_size, q->max_segment_size);
min_not_zero(rs->max_segment_size, queue_max_segment_size(q));
rs->max_hw_sectors =
min_not_zero(rs->max_hw_sectors, q->max_hw_sectors);
min_not_zero(rs->max_hw_sectors, queue_max_hw_sectors(q));
rs->seg_boundary_mask =
min_not_zero(rs->seg_boundary_mask,
q->seg_boundary_mask);
queue_segment_boundary(q));
rs->bounce_pfn = min_not_zero(rs->bounce_pfn, q->bounce_pfn);
rs->bounce_pfn = min_not_zero(rs->bounce_pfn, queue_bounce_pfn(q));
rs->no_cluster |= !test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
}
@ -914,13 +914,13 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q)
* restrictions.
*/
blk_queue_max_sectors(q, t->limits.max_sectors);
q->max_phys_segments = t->limits.max_phys_segments;
q->max_hw_segments = t->limits.max_hw_segments;
q->logical_block_size = t->limits.logical_block_size;
q->max_segment_size = t->limits.max_segment_size;
q->max_hw_sectors = t->limits.max_hw_sectors;
q->seg_boundary_mask = t->limits.seg_boundary_mask;
q->bounce_pfn = t->limits.bounce_pfn;
blk_queue_max_phys_segments(q, t->limits.max_phys_segments);
blk_queue_max_hw_segments(q, t->limits.max_hw_segments);
blk_queue_logical_block_size(q, t->limits.logical_block_size);
blk_queue_max_segment_size(q, t->limits.max_segment_size);
blk_queue_max_hw_sectors(q, t->limits.max_hw_sectors);
blk_queue_segment_boundary(q, t->limits.seg_boundary_mask);
blk_queue_bounce_limit(q, t->limits.bounce_pfn);
if (t->limits.no_cluster)
queue_flag_clear_unlocked(QUEUE_FLAG_CLUSTER, q);

2
drivers/md/linear.c
View file

@ -146,7 +146,7 @@ static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
* a one page request is never in violation.
*/
if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
disk->num_sectors = rdev->sectors;

4
drivers/md/multipath.c
View file

@ -303,7 +303,7 @@ static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
* merge_bvec_fn will be involved in multipath.)
*/
if (q->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
queue_max_sectors(q) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
conf->working_disks++;
@ -467,7 +467,7 @@ static int multipath_run (mddev_t *mddev)
* violating it, not that we ever expect a device with
* a merge_bvec_fn to be involved in multipath */
if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
if (!test_bit(Faulty, &rdev->flags))

2
drivers/md/raid0.c
View file

@ -144,7 +144,7 @@ static int create_strip_zones (mddev_t *mddev)
*/
if (rdev1->bdev->bd_disk->queue->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
if (!smallest || (rdev1->sectors < smallest->sectors))

4
drivers/md/raid1.c
View file

@ -1130,7 +1130,7 @@ static int raid1_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
* a one page request is never in violation.
*/
if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
p->head_position = 0;
@ -1996,7 +1996,7 @@ static int run(mddev_t *mddev)
* a one page request is never in violation.
*/
if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
disk->head_position = 0;

8
drivers/md/raid10.c
View file

@ -1158,8 +1158,8 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
* a one page request is never in violation.
*/
if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
mddev->queue->max_sectors = (PAGE_SIZE>>9);
queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
p->head_position = 0;
rdev->raid_disk = mirror;
@ -2145,8 +2145,8 @@ static int run(mddev_t *mddev)
* a one page request is never in violation.
*/
if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
mddev->queue->max_sectors = (PAGE_SIZE>>9);
queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
disk->head_position = 0;
}

4
drivers/md/raid5.c
View file

@ -3463,10 +3463,10 @@ static int bio_fits_rdev(struct bio *bi)
{
struct request_queue *q = bdev_get_queue(bi->bi_bdev);
if ((bi->bi_size>>9) > q->max_sectors)
if ((bi->bi_size>>9) > queue_max_sectors(q))
return 0;
blk_recount_segments(q, bi);
if (bi->bi_phys_segments > q->max_phys_segments)
if (bi->bi_phys_segments > queue_max_phys_segments(q))
return 0;
if (q->merge_bvec_fn)

15
drivers/scsi/sg.c
View file

@ -289,8 +289,8 @@ sg_open(struct inode *inode, struct file *filp)
if (list_empty(&sdp->sfds)) { /* no existing opens on this device */
sdp->sgdebug = 0;
q = sdp->device->request_queue;
sdp->sg_tablesize = min(q->max_hw_segments,
q->max_phys_segments);
sdp->sg_tablesize = min(queue_max_hw_segments(q),
queue_max_phys_segments(q));
}
if ((sfp = sg_add_sfp(sdp, dev)))
filp->private_data = sfp;
@ -909,7 +909,7 @@ sg_ioctl(struct inode *inode, struct file *filp,
if (val < 0)
return -EINVAL;
val = min_t(int, val,
sdp->device->request_queue->max_sectors * 512);
queue_max_sectors(sdp->device->request_queue) * 512);
if (val != sfp->reserve.bufflen) {
if (sg_res_in_use(sfp) || sfp->mmap_called)
return -EBUSY;
@ -919,7 +919,7 @@ sg_ioctl(struct inode *inode, struct file *filp,
return 0;
case SG_GET_RESERVED_SIZE:
val = min_t(int, sfp->reserve.bufflen,
sdp->device->request_queue->max_sectors * 512);
queue_max_sectors(sdp->device->request_queue) * 512);
return put_user(val, ip);
case SG_SET_COMMAND_Q:
result = get_user(val, ip);
@ -1059,7 +1059,7 @@ sg_ioctl(struct inode *inode, struct file *filp,
return -ENODEV;
return scsi_ioctl(sdp->device, cmd_in, p);
case BLKSECTGET:
return put_user(sdp->device->request_queue->max_sectors * 512,
return put_user(queue_max_sectors(sdp->device->request_queue) * 512,
ip);
case BLKTRACESETUP:
return blk_trace_setup(sdp->device->request_queue,
@ -1377,7 +1377,8 @@ static Sg_device *sg_alloc(struct gendisk *disk, struct scsi_device *scsidp)
sdp->device = scsidp;
INIT_LIST_HEAD(&sdp->sfds);
init_waitqueue_head(&sdp->o_excl_wait);
sdp->sg_tablesize = min(q->max_hw_segments, q->max_phys_segments);
sdp->sg_tablesize = min(queue_max_hw_segments(q),
queue_max_phys_segments(q));
sdp->index = k;
kref_init(&sdp->d_ref);
@ -2055,7 +2056,7 @@ sg_add_sfp(Sg_device * sdp, int dev)
sg_big_buff = def_reserved_size;
bufflen = min_t(int, sg_big_buff,
sdp->device->request_queue->max_sectors * 512);
queue_max_sectors(sdp->device->request_queue) * 512);
sg_build_reserve(sfp, bufflen);
SCSI_LOG_TIMEOUT(3, printk("sg_add_sfp: bufflen=%d, k_use_sg=%d\n",
sfp->reserve.bufflen, sfp->reserve.k_use_sg));

4
drivers/scsi/st.c
View file

@ -3983,8 +3983,8 @@ static int st_probe(struct device *dev)
return -ENODEV;
}
i = min(SDp->request_queue->max_hw_segments,
SDp->request_queue->max_phys_segments);
i = min(queue_max_hw_segments(SDp->request_queue),
queue_max_phys_segments(SDp->request_queue));
if (st_max_sg_segs < i)
i = st_max_sg_segs;
buffer = new_tape_buffer((SDp->host)->unchecked_isa_dma, i);

4
drivers/usb/storage/scsiglue.c
View file

@ -132,7 +132,7 @@ static int slave_configure(struct scsi_device *sdev)
if (us->fflags & US_FL_MAX_SECTORS_MIN)
max_sectors = PAGE_CACHE_SIZE >> 9;
if (sdev->request_queue->max_sectors > max_sectors)
if (queue_max_sectors(sdev->request_queue) > max_sectors)
blk_queue_max_sectors(sdev->request_queue,
max_sectors);
} else if (sdev->type == TYPE_TAPE) {
@ -483,7 +483,7 @@ static ssize_t show_max_sectors(struct device *dev, struct device_attribute *att
{
struct scsi_device *sdev = to_scsi_device(dev);
return sprintf(buf, "%u\n", sdev->request_queue->max_sectors);
return sprintf(buf, "%u\n", queue_max_sectors(sdev->request_queue));
}
/* Input routine for the sysfs max_sectors file */

19
fs/bio.c
View file

@ -499,11 +499,11 @@ int bio_get_nr_vecs(struct block_device *bdev)
struct request_queue *q = bdev_get_queue(bdev);
int nr_pages;
nr_pages = ((q->max_sectors << 9) + PAGE_SIZE - 1) >> PAGE_SHIFT;
if (nr_pages > q->max_phys_segments)
nr_pages = q->max_phys_segments;
if (nr_pages > q->max_hw_segments)
nr_pages = q->max_hw_segments;
nr_pages = ((queue_max_sectors(q) << 9) + PAGE_SIZE - 1) >> PAGE_SHIFT;
if (nr_pages > queue_max_phys_segments(q))
nr_pages = queue_max_phys_segments(q);
if (nr_pages > queue_max_hw_segments(q))
nr_pages = queue_max_hw_segments(q);
return nr_pages;
}
@ -562,8 +562,8 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
* make this too complex.
*/
while (bio->bi_phys_segments >= q->max_phys_segments
|| bio->bi_phys_segments >= q->max_hw_segments) {
while (bio->bi_phys_segments >= queue_max_phys_segments(q)
|| bio->bi_phys_segments >= queue_max_hw_segments(q)) {
if (retried_segments)
return 0;
@ -634,7 +634,8 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page *page,
unsigned int len, unsigned int offset)
{
return __bio_add_page(q, bio, page, len, offset, q->max_hw_sectors);
return __bio_add_page(q, bio, page, len, offset,
queue_max_hw_sectors(q));
}
/**
@ -654,7 +655,7 @@ int bio_add_page(struct bio *bio, struct page *page, unsigned int len,
unsigned int offset)
{
struct request_queue *q = bdev_get_queue(bio->bi_bdev);
return __bio_add_page(q, bio, page, len, offset, q->max_sectors);
return __bio_add_page(q, bio, page, len, offset, queue_max_sectors(q));
}
struct bio_map_data {

2
include/linux/bio.h
View file

@ -279,7 +279,7 @@ static inline int bio_has_allocated_vec(struct bio *bio)
#define __BIO_SEG_BOUNDARY(addr1, addr2, mask) \
(((addr1) | (mask)) == (((addr2) - 1) | (mask)))
#define BIOVEC_SEG_BOUNDARY(q, b1, b2) \
__BIO_SEG_BOUNDARY(bvec_to_phys((b1)), bvec_to_phys((b2)) + (b2)->bv_len, (q)->seg_boundary_mask)
__BIO_SEG_BOUNDARY(bvec_to_phys((b1)), bvec_to_phys((b2)) + (b2)->bv_len, queue_segment_boundary((q)))
#define BIO_SEG_BOUNDARY(q, b1, b2) \
BIOVEC_SEG_BOUNDARY((q), __BVEC_END((b1)), __BVEC_START((b2)))

36
include/linux/blkdev.h
View file

@ -898,6 +898,7 @@ extern void blk_cleanup_queue(struct request_queue *);
extern void blk_queue_make_request(struct request_queue *, make_request_fn *);
extern void blk_queue_bounce_limit(struct request_queue *, u64);
extern void blk_queue_max_sectors(struct request_queue *, unsigned int);
extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int);
extern void blk_queue_max_phys_segments(struct request_queue *, unsigned short);
extern void blk_queue_max_hw_segments(struct request_queue *, unsigned short);
extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
@ -988,6 +989,41 @@ extern void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter);
#define blkdev_entry_to_request(entry) list_entry((entry), struct request, queuelist)
static inline unsigned long queue_bounce_pfn(struct request_queue *q)
{
return q->bounce_pfn;
}
static inline unsigned long queue_segment_boundary(struct request_queue *q)
{
return q->seg_boundary_mask;
}
static inline unsigned int queue_max_sectors(struct request_queue *q)
{
return q->max_sectors;
}
static inline unsigned int queue_max_hw_sectors(struct request_queue *q)
{
return q->max_hw_sectors;
}
static inline unsigned short queue_max_hw_segments(struct request_queue *q)
{
return q->max_hw_segments;
}
static inline unsigned short queue_max_phys_segments(struct request_queue *q)
{
return q->max_phys_segments;
}
static inline unsigned int queue_max_segment_size(struct request_queue *q)
{
return q->max_segment_size;
}
static inline unsigned short queue_logical_block_size(struct request_queue *q)
{
int retval = 512;

4
mm/bounce.c
View file

@ -192,7 +192,7 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
/*
* is destination page below bounce pfn?
*/
if (page_to_pfn(page) <= q->bounce_pfn)
if (page_to_pfn(page) <= queue_bounce_pfn(q))
continue;
/*
@ -284,7 +284,7 @@ void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
* don't waste time iterating over bio segments
*/
if (!(q->bounce_gfp & GFP_DMA)) {
if (q->bounce_pfn >= blk_max_pfn)
if (queue_bounce_pfn(q) >= blk_max_pfn)
return;
pool = page_pool;
} else {