rq->__sector = (sector_t) -1;
INIT_HLIST_NODE(&rq->hash);
RB_CLEAR_NODE(&rq->rb_node);
- rq->tag = -1;
- rq->internal_tag = -1;
+ rq->tag = BLK_MQ_NO_TAG;
+ rq->internal_tag = BLK_MQ_NO_TAG;
rq->start_time_ns = ktime_get_ns();
rq->part = NULL;
refcount_set(&rq->ref, 1);
/* device mapper special case, should not leak out: */
[BLK_STS_DM_REQUEUE] = { -EREMCHG, "dm internal retry" },
+ /* zone device specific errors */
+ [BLK_STS_ZONE_OPEN_RESOURCE] = { -ETOOMANYREFS, "open zones exceeded" },
+ [BLK_STS_ZONE_ACTIVE_RESOURCE] = { -EOVERFLOW, "active zones exceeded" },
+
/* everything else not covered above: */
[BLK_STS_IOERR] = { -EIO, "I/O" },
};
if (!q->stats)
goto fail_stats;
- q->backing_dev_info->ra_pages = VM_READAHEAD_PAGES;
- q->backing_dev_info->io_pages = VM_READAHEAD_PAGES;
- q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK;
q->node = node_id;
+ atomic_set(&q->nr_active_requests_shared_sbitmap, 0);
+
timer_setup(&q->backing_dev_info->laptop_mode_wb_timer,
laptop_mode_timer_fn, 0);
timer_setup(&q->timeout, blk_rq_timed_out_timer, 0);
}
EXPORT_SYMBOL(blk_put_request);
-static void blk_account_io_merge_bio(struct request *req)
-{
- if (!blk_do_io_stat(req))
- return;
-
- part_stat_lock();
- part_stat_inc(req->part, merges[op_stat_group(req_op(req))]);
- part_stat_unlock();
-}
-
-bool bio_attempt_back_merge(struct request *req, struct bio *bio,
- unsigned int nr_segs)
-{
- const int ff = bio->bi_opf & REQ_FAILFAST_MASK;
-
- if (!ll_back_merge_fn(req, bio, nr_segs))
- return false;
-
- trace_block_bio_backmerge(req->q, req, bio);
- rq_qos_merge(req->q, req, bio);
-
- if ((req->cmd_flags & REQ_FAILFAST_MASK) != ff)
- blk_rq_set_mixed_merge(req);
-
- req->biotail->bi_next = bio;
- req->biotail = bio;
- req->__data_len += bio->bi_iter.bi_size;
-
- bio_crypt_free_ctx(bio);
-
- blk_account_io_merge_bio(req);
- return true;
-}
-
-bool bio_attempt_front_merge(struct request *req, struct bio *bio,
- unsigned int nr_segs)
-{
- const int ff = bio->bi_opf & REQ_FAILFAST_MASK;
-
- if (!ll_front_merge_fn(req, bio, nr_segs))
- return false;
-
- trace_block_bio_frontmerge(req->q, req, bio);
- rq_qos_merge(req->q, req, bio);
-
- if ((req->cmd_flags & REQ_FAILFAST_MASK) != ff)
- blk_rq_set_mixed_merge(req);
-
- bio->bi_next = req->bio;
- req->bio = bio;
-
- req->__sector = bio->bi_iter.bi_sector;
- req->__data_len += bio->bi_iter.bi_size;
-
- bio_crypt_do_front_merge(req, bio);
-
- blk_account_io_merge_bio(req);
- return true;
-}
-
-bool bio_attempt_discard_merge(struct request_queue *q, struct request *req,
- struct bio *bio)
-{
- unsigned short segments = blk_rq_nr_discard_segments(req);
-
- if (segments >= queue_max_discard_segments(q))
- goto no_merge;
- if (blk_rq_sectors(req) + bio_sectors(bio) >
- blk_rq_get_max_sectors(req, blk_rq_pos(req)))
- goto no_merge;
-
- rq_qos_merge(q, req, bio);
-
- req->biotail->bi_next = bio;
- req->biotail = bio;
- req->__data_len += bio->bi_iter.bi_size;
- req->nr_phys_segments = segments + 1;
-
- blk_account_io_merge_bio(req);
- return true;
-no_merge:
- req_set_nomerge(q, req);
- return false;
-}
-
-/**
- * blk_attempt_plug_merge - try to merge with %current's plugged list
- * @q: request_queue new bio is being queued at
- * @bio: new bio being queued
- * @nr_segs: number of segments in @bio
- * @same_queue_rq: pointer to &struct request that gets filled in when
- * another request associated with @q is found on the plug list
- * (optional, may be %NULL)
- *
- * Determine whether @bio being queued on @q can be merged with a request
- * on %current's plugged list. Returns %true if merge was successful,
- * otherwise %false.
- *
- * Plugging coalesces IOs from the same issuer for the same purpose without
- * going through @q->queue_lock. As such it's more of an issuing mechanism
- * than scheduling, and the request, while may have elvpriv data, is not
- * added on the elevator at this point. In addition, we don't have
- * reliable access to the elevator outside queue lock. Only check basic
- * merging parameters without querying the elevator.
- *
- * Caller must ensure !blk_queue_nomerges(q) beforehand.
- */
-bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
- unsigned int nr_segs, struct request **same_queue_rq)
-{
- struct blk_plug *plug;
- struct request *rq;
- struct list_head *plug_list;
-
- plug = blk_mq_plug(q, bio);
- if (!plug)
- return false;
-
- plug_list = &plug->mq_list;
-
- list_for_each_entry_reverse(rq, plug_list, queuelist) {
- bool merged = false;
-
- if (rq->q == q && same_queue_rq) {
- /*
- * Only blk-mq multiple hardware queues case checks the
- * rq in the same queue, there should be only one such
- * rq in a queue
- **/
- *same_queue_rq = rq;
- }
-
- if (rq->q != q || !blk_rq_merge_ok(rq, bio))
- continue;
-
- switch (blk_try_merge(rq, bio)) {
- case ELEVATOR_BACK_MERGE:
- merged = bio_attempt_back_merge(rq, bio, nr_segs);
- break;
- case ELEVATOR_FRONT_MERGE:
- merged = bio_attempt_front_merge(rq, bio, nr_segs);
- break;
- case ELEVATOR_DISCARD_MERGE:
- merged = bio_attempt_discard_merge(q, rq, bio);
- break;
- default:
- break;
- }
-
- if (merged)
- return true;
- }
-
- return false;
-}
-
static void handle_bad_sector(struct bio *bio, sector_t maxsector)
{
char b[BDEVNAME_SIZE];
- printk(KERN_INFO "attempt to access beyond end of device\n");
- printk(KERN_INFO "%s: rw=%d, want=%Lu, limit=%Lu\n",
- bio_devname(bio, b), bio->bi_opf,
- (unsigned long long)bio_end_sector(bio),
- (long long)maxsector);
+ pr_info_ratelimited("attempt to access beyond end of device\n"
+ "%s: rw=%d, want=%llu, limit=%llu\n",
+ bio_devname(bio, b), bio->bi_opf,
+ bio_end_sector(bio), maxsector);
}
#ifdef CONFIG_FAIL_MAKE_REQUEST
}
__setup("fail_make_request=", setup_fail_make_request);
-static bool should_fail_request(struct hd_struct *part, unsigned int bytes)
+static bool should_fail_request(struct block_device *part, unsigned int bytes)
{
- return part->make_it_fail && should_fail(&fail_make_request, bytes);
+ return part->bd_make_it_fail && should_fail(&fail_make_request, bytes);
}
static int __init fail_make_request_debugfs(void)
#else /* CONFIG_FAIL_MAKE_REQUEST */
-static inline bool should_fail_request(struct hd_struct *part,
+static inline bool should_fail_request(struct block_device *part,
unsigned int bytes)
{
return false;
#endif /* CONFIG_FAIL_MAKE_REQUEST */
-static inline bool bio_check_ro(struct bio *bio, struct hd_struct *part)
+static inline bool bio_check_ro(struct bio *bio, struct block_device *part)
{
const int op = bio_op(bio);
- if (part->policy && op_is_write(op)) {
+ if (part->bd_read_only && op_is_write(op)) {
char b[BDEVNAME_SIZE];
if (op_is_flush(bio->bi_opf) && !bio_sectors(bio))
WARN_ONCE(1,
"Trying to write to read-only block-device %s (partno %d)\n",
- bio_devname(bio, b), part->partno);
+ bio_devname(bio, b), part->bd_partno);
/* Older lvm-tools actually trigger this */
return false;
}
static noinline int should_fail_bio(struct bio *bio)
{
- if (should_fail_request(&bio->bi_disk->part0, bio->bi_iter.bi_size))
+ if (should_fail_request(bio->bi_disk->part0, bio->bi_iter.bi_size))
return -EIO;
return 0;
}
*/
static inline int blk_partition_remap(struct bio *bio)
{
- struct hd_struct *p;
+ struct block_device *p;
int ret = -EIO;
rcu_read_lock();
goto out;
if (bio_sectors(bio)) {
- if (bio_check_eod(bio, part_nr_sects_read(p)))
+ if (bio_check_eod(bio, bdev_nr_sectors(p)))
goto out;
- bio->bi_iter.bi_sector += p->start_sect;
- trace_block_bio_remap(bio->bi_disk->queue, bio, part_devt(p),
- bio->bi_iter.bi_sector - p->start_sect);
+ bio->bi_iter.bi_sector += p->bd_start_sect;
+ trace_block_bio_remap(bio, p->bd_dev,
+ bio->bi_iter.bi_sector -
+ p->bd_start_sect);
}
bio->bi_partno = 0;
ret = 0;
/*
* For a REQ_NOWAIT based request, return -EOPNOTSUPP
- * if queue is not a request based queue.
+ * if queue does not support NOWAIT.
*/
- if ((bio->bi_opf & REQ_NOWAIT) && !queue_is_mq(q))
+ if ((bio->bi_opf & REQ_NOWAIT) && !blk_queue_nowait(q))
goto not_supported;
if (should_fail_bio(bio))
if (unlikely(blk_partition_remap(bio)))
goto end_io;
} else {
- if (unlikely(bio_check_ro(bio, &bio->bi_disk->part0)))
+ if (unlikely(bio_check_ro(bio, bio->bi_disk->part0)))
goto end_io;
if (unlikely(bio_check_eod(bio, get_capacity(bio->bi_disk))))
goto end_io;
blkcg_bio_issue_init(bio);
if (!bio_flagged(bio, BIO_TRACE_COMPLETION)) {
- trace_block_bio_queue(q, bio);
+ trace_block_bio_queue(bio);
/* Now that enqueuing has been traced, we need to trace
* completion as well.
*/
* limits when retrying requests on other queues. Those requests need
* to be checked against the new queue limits again during dispatch.
*/
-static int blk_cloned_rq_check_limits(struct request_queue *q,
+static blk_status_t blk_cloned_rq_check_limits(struct request_queue *q,
struct request *rq)
{
- if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, req_op(rq))) {
+ unsigned int max_sectors = blk_queue_get_max_sectors(q, req_op(rq));
+
+ if (blk_rq_sectors(rq) > max_sectors) {
+ /*
+ * SCSI device does not have a good way to return if
+ * Write Same/Zero is actually supported. If a device rejects
+ * a non-read/write command (discard, write same,etc.) the
+ * low-level device driver will set the relevant queue limit to
+ * 0 to prevent blk-lib from issuing more of the offending
+ * operations. Commands queued prior to the queue limit being
+ * reset need to be completed with BLK_STS_NOTSUPP to avoid I/O
+ * errors being propagated to upper layers.
+ */
+ if (max_sectors == 0)
+ return BLK_STS_NOTSUPP;
+
printk(KERN_ERR "%s: over max size limit. (%u > %u)\n",
- __func__, blk_rq_sectors(rq),
- blk_queue_get_max_sectors(q, req_op(rq)));
- return -EIO;
+ __func__, blk_rq_sectors(rq), max_sectors);
+ return BLK_STS_IOERR;
}
/*
if (rq->nr_phys_segments > queue_max_segments(q)) {
printk(KERN_ERR "%s: over max segments limit. (%hu > %hu)\n",
__func__, rq->nr_phys_segments, queue_max_segments(q));
- return -EIO;
+ return BLK_STS_IOERR;
}
- return 0;
+ return BLK_STS_OK;
}
/**
*/
blk_status_t blk_insert_cloned_request(struct request_queue *q, struct request *rq)
{
- if (blk_cloned_rq_check_limits(q, rq))
- return BLK_STS_IOERR;
+ blk_status_t ret;
+
+ ret = blk_cloned_rq_check_limits(q, rq);
+ if (ret != BLK_STS_OK)
+ return ret;
if (rq->rq_disk &&
- should_fail_request(&rq->rq_disk->part0, blk_rq_bytes(rq)))
+ should_fail_request(rq->rq_disk->part0, blk_rq_bytes(rq)))
return BLK_STS_IOERR;
if (blk_crypto_insert_cloned_request(rq))
}
EXPORT_SYMBOL_GPL(blk_rq_err_bytes);
-static void update_io_ticks(struct hd_struct *part, unsigned long now, bool end)
+static void update_io_ticks(struct block_device *part, unsigned long now,
+ bool end)
{
unsigned long stamp;
again:
- stamp = READ_ONCE(part->stamp);
+ stamp = READ_ONCE(part->bd_stamp);
if (unlikely(stamp != now)) {
- if (likely(cmpxchg(&part->stamp, stamp, now) == stamp))
+ if (likely(cmpxchg(&part->bd_stamp, stamp, now) == stamp))
__part_stat_add(part, io_ticks, end ? now - stamp : 1);
}
- if (part->partno) {
- part = &part_to_disk(part)->part0;
+ if (part->bd_partno) {
+ part = bdev_whole(part);
goto again;
}
}
{
if (req->part && blk_do_io_stat(req)) {
const int sgrp = op_stat_group(req_op(req));
- struct hd_struct *part;
part_stat_lock();
- part = req->part;
- part_stat_add(part, sectors[sgrp], bytes >> 9);
+ part_stat_add(req->part, sectors[sgrp], bytes >> 9);
part_stat_unlock();
}
}
if (req->part && blk_do_io_stat(req) &&
!(req->rq_flags & RQF_FLUSH_SEQ)) {
const int sgrp = op_stat_group(req_op(req));
- struct hd_struct *part;
part_stat_lock();
- part = req->part;
-
- update_io_ticks(part, jiffies, true);
- part_stat_inc(part, ios[sgrp]);
- part_stat_add(part, nsecs[sgrp], now - req->start_time_ns);
+ update_io_ticks(req->part, jiffies, true);
+ part_stat_inc(req->part, ios[sgrp]);
+ part_stat_add(req->part, nsecs[sgrp], now - req->start_time_ns);
part_stat_unlock();
-
- hd_struct_put(part);
}
}
part_stat_unlock();
}
-unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors,
- unsigned int op)
+static unsigned long __part_start_io_acct(struct block_device *part,
+ unsigned int sectors, unsigned int op)
{
- struct hd_struct *part = &disk->part0;
const int sgrp = op_stat_group(op);
unsigned long now = READ_ONCE(jiffies);
return now;
}
+
+unsigned long part_start_io_acct(struct gendisk *disk, struct block_device **part,
+ struct bio *bio)
+{
+ *part = disk_map_sector_rcu(disk, bio->bi_iter.bi_sector);
+
+ return __part_start_io_acct(*part, bio_sectors(bio), bio_op(bio));
+}
+EXPORT_SYMBOL_GPL(part_start_io_acct);
+
+unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors,
+ unsigned int op)
+{
+ return __part_start_io_acct(disk->part0, sectors, op);
+}
EXPORT_SYMBOL(disk_start_io_acct);
-void disk_end_io_acct(struct gendisk *disk, unsigned int op,
- unsigned long start_time)
+static void __part_end_io_acct(struct block_device *part, unsigned int op,
+ unsigned long start_time)
{
- struct hd_struct *part = &disk->part0;
const int sgrp = op_stat_group(op);
unsigned long now = READ_ONCE(jiffies);
unsigned long duration = now - start_time;
part_stat_local_dec(part, in_flight[op_is_write(op)]);
part_stat_unlock();
}
+
+void part_end_io_acct(struct block_device *part, struct bio *bio,
+ unsigned long start_time)
+{
+ __part_end_io_acct(part, bio_op(bio), start_time);
+}
+EXPORT_SYMBOL_GPL(part_end_io_acct);
+
+void disk_end_io_acct(struct gendisk *disk, unsigned int op,
+ unsigned long start_time)
+{
+ __part_end_io_acct(disk->part0, op, start_time);
+}
EXPORT_SYMBOL(disk_end_io_acct);
/*
if (rq->bio) {
rq->biotail->bi_next = bio;
rq->biotail = bio;
- } else
+ } else {
rq->bio = rq->biotail = bio;
+ }
+ bio = NULL;
}
/* Copy attributes of the original request to the clone request. */
rq->nr_phys_segments = rq_src->nr_phys_segments;
rq->ioprio = rq_src->ioprio;
- if (rq->bio)
- blk_crypto_rq_bio_prep(rq, rq->bio, gfp_mask);
+ if (rq->bio && blk_crypto_rq_bio_prep(rq, rq->bio, gfp_mask) < 0)
+ goto free_and_out;
return 0;
projects / linux-2.6-microblaze.git / blobdiff