EDITED BY MIKE SNITZER From ae03bf639a5027d27270123f5f6e3ee6a412781d Mon Sep 17 00:00:00 2001 From: Martin K. Petersen Date: Fri, 22 May 2009 17:17:50 -0400 Subject: [PATCH 2/6] block: Use accessor functions for queue limits 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 Signed-off-by: Jens Axboe --- block/blk-barrier.c | 8 ++++---- block/blk-core.c | 16 ++++++++-------- block/blk-map.c | 4 ++-- block/blk-merge.c | 27 ++++++++++++++------------- block/blk-settings.c | 15 ++++++++++++--- block/blk-sysfs.c | 8 ++++---- block/compat_ioctl.c | 2 +- block/ioctl.c | 10 +++++----- block/scsi_ioctl.c | 8 ++++---- drivers/block/pktcdvd.c | 6 ++++-- drivers/cdrom/cdrom.c | 4 ++-- drivers/ide/ide-disk.c | 2 +- drivers/md/dm-table.c | 28 ++++++++++++++-------------- drivers/md/linear.c | 2 +- drivers/md/multipath.c | 4 ++-- drivers/md/raid0.c | 2 +- drivers/md/raid1.c | 4 ++-- drivers/md/raid10.c | 8 ++++---- drivers/md/raid5.c | 4 ++-- drivers/scsi/sg.c | 15 ++++++++------- drivers/scsi/st.c | 4 ++-- drivers/usb/storage/scsiglue.c | 4 ++-- fs/bio.c | 19 ++++++++++--------- include/linux/bio.h | 2 +- include/linux/blkdev.h | 36 ++++++++++++++++++++++++++++++++++++ mm/bounce.c | 4 ++-- 26 files changed, 148 insertions(+), 98 deletions(-) Index: linux-2.6/block/blk-barrier.c =================================================================== --- linux-2.6.orig/block/blk-barrier.c +++ linux-2.6/block/blk-barrier.c @@ -393,10 +393,10 @@ int blkdev_issue_discard(struct block_de 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; Index: linux-2.6/block/blk-core.c =================================================================== --- linux-2.6.orig/block/blk-core.c +++ linux-2.6/block/blk-core.c @@ -1422,11 +1422,11 @@ static inline void __generic_make_reques 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; } @@ -1593,8 +1593,8 @@ EXPORT_SYMBOL(submit_bio); */ int blk_rq_check_limits(struct request_queue *q, struct request *rq) { - if (rq->nr_sectors > q->max_sectors || - rq->data_len > q->max_hw_sectors << 9) { + if (rq->nr_sectors > queue_max_sectors(q) || + rq->data_len > queue_max_sectors(q) << 9) { printk(KERN_ERR "%s: over max size limit.\n", __func__); return -EIO; } @@ -1606,8 +1606,8 @@ int blk_rq_check_limits(struct request_q * 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; } Index: linux-2.6/block/blk-map.c =================================================================== --- linux-2.6.orig/block/blk-map.c +++ linux-2.6/block/blk-map.c @@ -116,7 +116,7 @@ int blk_rq_map_user(struct request_queue 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; @@ -291,7 +291,7 @@ int blk_rq_map_kern(struct request_queue int do_copy = 0; struct bio *bio; - if (len > (q->max_hw_sectors << 9)) + if (len > (queue_max_hw_sectors(q) << 9)) return -EINVAL; if (!len || !kbuf) return -EINVAL; Index: linux-2.6/block/blk-merge.c =================================================================== --- linux-2.6.orig/block/blk-merge.c +++ linux-2.6/block/blk-merge.c @@ -61,11 +61,12 @@ static unsigned int __blk_recalc_rq_segm * 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; @@ -120,7 +121,7 @@ static int blk_phys_contig_segment(struc 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)) @@ -163,7 +164,7 @@ int blk_rq_map_sg(struct request_queue * 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)) @@ -233,8 +234,8 @@ static inline int ll_new_hw_segment(stru { 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; @@ -255,9 +256,9 @@ int ll_back_merge_fn(struct request_queu 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 (req->nr_sectors + bio_sectors(bio) > max_sectors) { req->cmd_flags |= REQ_NOMERGE; @@ -279,9 +280,9 @@ int ll_front_merge_fn(struct request_que 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 (req->nr_sectors + bio_sectors(bio) > max_sectors) { @@ -315,7 +316,7 @@ static int ll_merge_requests_fn(struct r /* * Will it become too large? */ - if ((req->nr_sectors + next->nr_sectors) > q->max_sectors) + if ((req->nr_sectors + next->nr_sectors) > queue_max_sectors(q)) return 0; total_phys_segments = req->nr_phys_segments + next->nr_phys_segments; @@ -327,10 +328,10 @@ static int ll_merge_requests_fn(struct r 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... */ Index: linux-2.6/block/blk-settings.c =================================================================== --- linux-2.6.orig/block/blk-settings.c +++ linux-2.6/block/blk-settings.c @@ -219,6 +219,15 @@ void blk_queue_max_sectors(struct reques } 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_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; Index: linux-2.6/block/blk-sysfs.c =================================================================== --- linux-2.6.orig/block/blk-sysfs.c +++ linux-2.6/block/blk-sysfs.c @@ -95,7 +95,7 @@ queue_ra_store(struct request_queue *q, 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_q 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_q 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)); } Index: linux-2.6/block/compat_ioctl.c =================================================================== --- linux-2.6.orig/block/compat_ioctl.c +++ linux-2.6/block/compat_ioctl.c @@ -766,7 +766,7 @@ long compat_blkdev_ioctl(struct file *fi 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)) Index: linux-2.6/block/ioctl.c =================================================================== --- linux-2.6.orig/block/ioctl.c +++ linux-2.6/block/ioctl.c @@ -152,10 +152,10 @@ static int blk_ioctl_discard(struct bloc 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 *bd 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)) Index: linux-2.6/block/scsi_ioctl.c =================================================================== --- linux-2.6.orig/block/scsi_ioctl.c +++ linux-2.6/block/scsi_ioctl.c @@ -75,7 +75,7 @@ static int sg_set_timeout(struct request 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 r 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 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) Index: linux-2.6/drivers/block/pktcdvd.c =================================================================== --- linux-2.6.orig/drivers/block/pktcdvd.c +++ linux-2.6/drivers/block/pktcdvd.c @@ -991,13 +991,15 @@ static void pkt_iosched_process_queue(st */ 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 Index: linux-2.6/drivers/cdrom/cdrom.c =================================================================== --- linux-2.6.orig/drivers/cdrom/cdrom.c +++ linux-2.6/drivers/cdrom/cdrom.c @@ -2101,8 +2101,8 @@ static int cdrom_read_cdda_bpc(struct cd 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; Index: linux-2.6/drivers/md/dm-table.c =================================================================== --- linux-2.6.orig/drivers/md/dm-table.c +++ linux-2.6/drivers/md/dm-table.c @@ -510,7 +510,7 @@ void dm_set_device_limits(struct dm_targ * 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_targ 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 * 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); Index: linux-2.6/drivers/md/linear.c =================================================================== --- linux-2.6.orig/drivers/md/linear.c +++ linux-2.6/drivers/md/linear.c @@ -146,7 +146,7 @@ static linear_conf_t *linear_conf(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->num_sectors = rdev->sectors; Index: linux-2.6/drivers/md/multipath.c =================================================================== --- linux-2.6.orig/drivers/md/multipath.c +++ linux-2.6/drivers/md/multipath.c @@ -303,7 +303,7 @@ static int multipath_add_disk(mddev_t *m * 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)) Index: linux-2.6/drivers/md/raid0.c =================================================================== --- linux-2.6.orig/drivers/md/raid0.c +++ linux-2.6/drivers/md/raid0.c @@ -144,7 +144,7 @@ static int create_strip_zones (mddev_t * */ 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)) Index: linux-2.6/drivers/md/raid1.c =================================================================== --- linux-2.6.orig/drivers/md/raid1.c +++ linux-2.6/drivers/md/raid1.c @@ -1130,7 +1130,7 @@ static int raid1_add_disk(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); 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; Index: linux-2.6/drivers/md/raid10.c =================================================================== --- linux-2.6.orig/drivers/md/raid10.c +++ linux-2.6/drivers/md/raid10.c @@ -1158,8 +1158,8 @@ static int raid10_add_disk(mddev_t *mdde * 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; } Index: linux-2.6/drivers/md/raid5.c =================================================================== --- linux-2.6.orig/drivers/md/raid5.c +++ linux-2.6/drivers/md/raid5.c @@ -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) Index: linux-2.6/drivers/scsi/sg.c =================================================================== --- linux-2.6.orig/drivers/scsi/sg.c +++ linux-2.6/drivers/scsi/sg.c @@ -289,8 +289,8 @@ sg_open(struct inode *inode, struct file 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 fil 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 fil 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 fil 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 gendis 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)); Index: linux-2.6/drivers/scsi/st.c =================================================================== --- linux-2.6.orig/drivers/scsi/st.c +++ linux-2.6/drivers/scsi/st.c @@ -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); Index: linux-2.6/drivers/usb/storage/scsiglue.c =================================================================== --- linux-2.6.orig/drivers/usb/storage/scsiglue.c +++ linux-2.6/drivers/usb/storage/scsiglue.c @@ -132,7 +132,7 @@ static int slave_configure(struct scsi_d 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 d { 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 */ Index: linux-2.6/fs/bio.c =================================================================== --- linux-2.6.orig/fs/bio.c +++ linux-2.6/fs/bio.c @@ -499,11 +499,11 @@ int bio_get_nr_vecs(struct block_device 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 * 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 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 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 { Index: linux-2.6/include/linux/bio.h =================================================================== --- linux-2.6.orig/include/linux/bio.h +++ linux-2.6/include/linux/bio.h @@ -279,7 +279,7 @@ static inline int bio_has_allocated_vec( #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))) Index: linux-2.6/include/linux/blkdev.h =================================================================== --- linux-2.6.orig/include/linux/blkdev.h +++ linux-2.6/include/linux/blkdev.h @@ -877,6 +877,7 @@ extern void blk_cleanup_queue(struct req 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); @@ -967,6 +968,41 @@ extern void blk_set_cmd_filter_defaults( #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; Index: linux-2.6/mm/bounce.c =================================================================== --- linux-2.6.orig/mm/bounce.c +++ linux-2.6/mm/bounce.c @@ -192,7 +192,7 @@ static void __blk_queue_bounce(struct re /* * 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_que * 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 { Index: linux-2.6/drivers/ide/ide-disk.c =================================================================== --- linux-2.6.orig/drivers/ide/ide-disk.c +++ linux-2.6/drivers/ide/ide-disk.c @@ -640,7 +640,7 @@ static void ide_disk_setup(ide_drive_t * } printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, - q->max_sectors / 2); + queue_max_sectors(q) / 2); if (ata_id_is_ssd(id)) queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);