Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"A small batch of fixes that should be included for the 4.13 release.
This contains:
- Revert of the 4k loop blocksize support. Even with a recent batch
of 4 fixes, we're still not really happy with it. Rather than be
stuck with an API issue, let's revert it and get it right for 4.14.
- Trivial patch from Bart, adding a few flags to the blk-mq debugfs
exports that were added in this release, but not to the debugfs
parts.
- Regression fix for bsg, fixing a potential kernel panic. From
Benjamin.
- Tweak for the blk throttling, improving how we account discards.
From Shaohua"
* 'for-linus' of git://git.kernel.dk/linux-block:
blk-mq-debugfs: Add names for recently added flags
bsg-lib: fix kernel panic resulting from missing allocation of reply-buffer
Revert "loop: support 4k physical blocksize"
blk-throttle: cap discard request size
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 9ebc294..4f927a5 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -75,6 +75,8 @@ static const char *const blk_queue_flag_name[] = {
QUEUE_FLAG_NAME(STATS),
QUEUE_FLAG_NAME(POLL_STATS),
QUEUE_FLAG_NAME(REGISTERED),
+ QUEUE_FLAG_NAME(SCSI_PASSTHROUGH),
+ QUEUE_FLAG_NAME(QUIESCED),
};
#undef QUEUE_FLAG_NAME
@@ -265,6 +267,7 @@ static const char *const cmd_flag_name[] = {
CMD_FLAG_NAME(RAHEAD),
CMD_FLAG_NAME(BACKGROUND),
CMD_FLAG_NAME(NOUNMAP),
+ CMD_FLAG_NAME(NOWAIT),
};
#undef CMD_FLAG_NAME
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index a7285bf..80f5481 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -382,6 +382,14 @@ static unsigned int tg_iops_limit(struct throtl_grp *tg, int rw)
} \
} while (0)
+static inline unsigned int throtl_bio_data_size(struct bio *bio)
+{
+ /* assume it's one sector */
+ if (unlikely(bio_op(bio) == REQ_OP_DISCARD))
+ return 512;
+ return bio->bi_iter.bi_size;
+}
+
static void throtl_qnode_init(struct throtl_qnode *qn, struct throtl_grp *tg)
{
INIT_LIST_HEAD(&qn->node);
@@ -934,6 +942,7 @@ static bool tg_with_in_bps_limit(struct throtl_grp *tg, struct bio *bio,
bool rw = bio_data_dir(bio);
u64 bytes_allowed, extra_bytes, tmp;
unsigned long jiffy_elapsed, jiffy_wait, jiffy_elapsed_rnd;
+ unsigned int bio_size = throtl_bio_data_size(bio);
jiffy_elapsed = jiffy_elapsed_rnd = jiffies - tg->slice_start[rw];
@@ -947,14 +956,14 @@ static bool tg_with_in_bps_limit(struct throtl_grp *tg, struct bio *bio,
do_div(tmp, HZ);
bytes_allowed = tmp;
- if (tg->bytes_disp[rw] + bio->bi_iter.bi_size <= bytes_allowed) {
+ if (tg->bytes_disp[rw] + bio_size <= bytes_allowed) {
if (wait)
*wait = 0;
return true;
}
/* Calc approx time to dispatch */
- extra_bytes = tg->bytes_disp[rw] + bio->bi_iter.bi_size - bytes_allowed;
+ extra_bytes = tg->bytes_disp[rw] + bio_size - bytes_allowed;
jiffy_wait = div64_u64(extra_bytes * HZ, tg_bps_limit(tg, rw));
if (!jiffy_wait)
@@ -1034,11 +1043,12 @@ static bool tg_may_dispatch(struct throtl_grp *tg, struct bio *bio,
static void throtl_charge_bio(struct throtl_grp *tg, struct bio *bio)
{
bool rw = bio_data_dir(bio);
+ unsigned int bio_size = throtl_bio_data_size(bio);
/* Charge the bio to the group */
- tg->bytes_disp[rw] += bio->bi_iter.bi_size;
+ tg->bytes_disp[rw] += bio_size;
tg->io_disp[rw]++;
- tg->last_bytes_disp[rw] += bio->bi_iter.bi_size;
+ tg->last_bytes_disp[rw] += bio_size;
tg->last_io_disp[rw]++;
/*
diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index c4513b2..dd56d74 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -29,26 +29,25 @@
#include <scsi/scsi_cmnd.h>
/**
- * bsg_destroy_job - routine to teardown/delete a bsg job
+ * bsg_teardown_job - routine to teardown a bsg job
* @job: bsg_job that is to be torn down
*/
-static void bsg_destroy_job(struct kref *kref)
+static void bsg_teardown_job(struct kref *kref)
{
struct bsg_job *job = container_of(kref, struct bsg_job, kref);
struct request *rq = job->req;
- blk_end_request_all(rq, BLK_STS_OK);
-
put_device(job->dev); /* release reference for the request */
kfree(job->request_payload.sg_list);
kfree(job->reply_payload.sg_list);
- kfree(job);
+
+ blk_end_request_all(rq, BLK_STS_OK);
}
void bsg_job_put(struct bsg_job *job)
{
- kref_put(&job->kref, bsg_destroy_job);
+ kref_put(&job->kref, bsg_teardown_job);
}
EXPORT_SYMBOL_GPL(bsg_job_put);
@@ -100,7 +99,7 @@ EXPORT_SYMBOL_GPL(bsg_job_done);
*/
static void bsg_softirq_done(struct request *rq)
{
- struct bsg_job *job = rq->special;
+ struct bsg_job *job = blk_mq_rq_to_pdu(rq);
bsg_job_put(job);
}
@@ -122,33 +121,20 @@ static int bsg_map_buffer(struct bsg_buffer *buf, struct request *req)
}
/**
- * bsg_create_job - create the bsg_job structure for the bsg request
+ * bsg_prepare_job - create the bsg_job structure for the bsg request
* @dev: device that is being sent the bsg request
* @req: BSG request that needs a job structure
*/
-static int bsg_create_job(struct device *dev, struct request *req)
+static int bsg_prepare_job(struct device *dev, struct request *req)
{
struct request *rsp = req->next_rq;
- struct request_queue *q = req->q;
struct scsi_request *rq = scsi_req(req);
- struct bsg_job *job;
+ struct bsg_job *job = blk_mq_rq_to_pdu(req);
int ret;
- BUG_ON(req->special);
-
- job = kzalloc(sizeof(struct bsg_job) + q->bsg_job_size, GFP_KERNEL);
- if (!job)
- return -ENOMEM;
-
- req->special = job;
- job->req = req;
- if (q->bsg_job_size)
- job->dd_data = (void *)&job[1];
job->request = rq->cmd;
job->request_len = rq->cmd_len;
- job->reply = rq->sense;
- job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
- * allocated */
+
if (req->bio) {
ret = bsg_map_buffer(&job->request_payload, req);
if (ret)
@@ -187,7 +173,6 @@ static void bsg_request_fn(struct request_queue *q)
{
struct device *dev = q->queuedata;
struct request *req;
- struct bsg_job *job;
int ret;
if (!get_device(dev))
@@ -199,7 +184,7 @@ static void bsg_request_fn(struct request_queue *q)
break;
spin_unlock_irq(q->queue_lock);
- ret = bsg_create_job(dev, req);
+ ret = bsg_prepare_job(dev, req);
if (ret) {
scsi_req(req)->result = ret;
blk_end_request_all(req, BLK_STS_OK);
@@ -207,8 +192,7 @@ static void bsg_request_fn(struct request_queue *q)
continue;
}
- job = req->special;
- ret = q->bsg_job_fn(job);
+ ret = q->bsg_job_fn(blk_mq_rq_to_pdu(req));
spin_lock_irq(q->queue_lock);
if (ret)
break;
@@ -219,6 +203,35 @@ static void bsg_request_fn(struct request_queue *q)
spin_lock_irq(q->queue_lock);
}
+static int bsg_init_rq(struct request_queue *q, struct request *req, gfp_t gfp)
+{
+ struct bsg_job *job = blk_mq_rq_to_pdu(req);
+ struct scsi_request *sreq = &job->sreq;
+
+ memset(job, 0, sizeof(*job));
+
+ scsi_req_init(sreq);
+ sreq->sense_len = SCSI_SENSE_BUFFERSIZE;
+ sreq->sense = kzalloc(sreq->sense_len, gfp);
+ if (!sreq->sense)
+ return -ENOMEM;
+
+ job->req = req;
+ job->reply = sreq->sense;
+ job->reply_len = sreq->sense_len;
+ job->dd_data = job + 1;
+
+ return 0;
+}
+
+static void bsg_exit_rq(struct request_queue *q, struct request *req)
+{
+ struct bsg_job *job = blk_mq_rq_to_pdu(req);
+ struct scsi_request *sreq = &job->sreq;
+
+ kfree(sreq->sense);
+}
+
/**
* bsg_setup_queue - Create and add the bsg hooks so we can receive requests
* @dev: device to attach bsg device to
@@ -235,7 +248,9 @@ struct request_queue *bsg_setup_queue(struct device *dev, char *name,
q = blk_alloc_queue(GFP_KERNEL);
if (!q)
return ERR_PTR(-ENOMEM);
- q->cmd_size = sizeof(struct scsi_request);
+ q->cmd_size = sizeof(struct bsg_job) + dd_job_size;
+ q->init_rq_fn = bsg_init_rq;
+ q->exit_rq_fn = bsg_exit_rq;
q->request_fn = bsg_request_fn;
ret = blk_init_allocated_queue(q);
@@ -243,7 +258,6 @@ struct request_queue *bsg_setup_queue(struct device *dev, char *name,
goto out_cleanup_queue;
q->queuedata = dev;
- q->bsg_job_size = dd_job_size;
q->bsg_job_fn = job_fn;
queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index ef83349..f321b96 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -221,8 +221,7 @@ static void __loop_update_dio(struct loop_device *lo, bool dio)
}
static int
-figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit,
- loff_t logical_blocksize)
+figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit)
{
loff_t size = get_size(offset, sizelimit, lo->lo_backing_file);
sector_t x = (sector_t)size;
@@ -234,12 +233,6 @@ figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit,
lo->lo_offset = offset;
if (lo->lo_sizelimit != sizelimit)
lo->lo_sizelimit = sizelimit;
- if (lo->lo_flags & LO_FLAGS_BLOCKSIZE) {
- lo->lo_logical_blocksize = logical_blocksize;
- blk_queue_physical_block_size(lo->lo_queue, lo->lo_blocksize);
- blk_queue_logical_block_size(lo->lo_queue,
- lo->lo_logical_blocksize);
- }
set_capacity(lo->lo_disk, x);
bd_set_size(bdev, (loff_t)get_capacity(bdev->bd_disk) << 9);
/* let user-space know about the new size */
@@ -820,7 +813,6 @@ static void loop_config_discard(struct loop_device *lo)
struct file *file = lo->lo_backing_file;
struct inode *inode = file->f_mapping->host;
struct request_queue *q = lo->lo_queue;
- int lo_bits = 9;
/*
* We use punch hole to reclaim the free space used by the
@@ -840,11 +832,9 @@ static void loop_config_discard(struct loop_device *lo)
q->limits.discard_granularity = inode->i_sb->s_blocksize;
q->limits.discard_alignment = 0;
- if (lo->lo_flags & LO_FLAGS_BLOCKSIZE)
- lo_bits = blksize_bits(lo->lo_logical_blocksize);
- blk_queue_max_discard_sectors(q, UINT_MAX >> lo_bits);
- blk_queue_max_write_zeroes_sectors(q, UINT_MAX >> lo_bits);
+ blk_queue_max_discard_sectors(q, UINT_MAX >> 9);
+ blk_queue_max_write_zeroes_sectors(q, UINT_MAX >> 9);
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
}
@@ -938,7 +928,6 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
lo->use_dio = false;
lo->lo_blocksize = lo_blocksize;
- lo->lo_logical_blocksize = 512;
lo->lo_device = bdev;
lo->lo_flags = lo_flags;
lo->lo_backing_file = file;
@@ -1104,7 +1093,6 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
int err;
struct loop_func_table *xfer;
kuid_t uid = current_uid();
- int lo_flags = lo->lo_flags;
if (lo->lo_encrypt_key_size &&
!uid_eq(lo->lo_key_owner, uid) &&
@@ -1137,26 +1125,9 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
if (err)
goto exit;
- if (info->lo_flags & LO_FLAGS_BLOCKSIZE) {
- if (!(lo->lo_flags & LO_FLAGS_BLOCKSIZE))
- lo->lo_logical_blocksize = 512;
- lo->lo_flags |= LO_FLAGS_BLOCKSIZE;
- if (LO_INFO_BLOCKSIZE(info) != 512 &&
- LO_INFO_BLOCKSIZE(info) != 1024 &&
- LO_INFO_BLOCKSIZE(info) != 2048 &&
- LO_INFO_BLOCKSIZE(info) != 4096)
- return -EINVAL;
- if (LO_INFO_BLOCKSIZE(info) > lo->lo_blocksize)
- return -EINVAL;
- }
-
if (lo->lo_offset != info->lo_offset ||
- lo->lo_sizelimit != info->lo_sizelimit ||
- lo->lo_flags != lo_flags ||
- ((lo->lo_flags & LO_FLAGS_BLOCKSIZE) &&
- lo->lo_logical_blocksize != LO_INFO_BLOCKSIZE(info))) {
- if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit,
- LO_INFO_BLOCKSIZE(info))) {
+ lo->lo_sizelimit != info->lo_sizelimit) {
+ if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit)) {
err = -EFBIG;
goto exit;
}
@@ -1348,8 +1319,7 @@ static int loop_set_capacity(struct loop_device *lo)
if (unlikely(lo->lo_state != Lo_bound))
return -ENXIO;
- return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit,
- lo->lo_logical_blocksize);
+ return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit);
}
static int loop_set_dio(struct loop_device *lo, unsigned long arg)
diff --git a/drivers/block/loop.h b/drivers/block/loop.h
index 2c096b9..fecd3f9 100644
--- a/drivers/block/loop.h
+++ b/drivers/block/loop.h
@@ -49,7 +49,6 @@ struct loop_device {
struct file * lo_backing_file;
struct block_device *lo_device;
unsigned lo_blocksize;
- unsigned lo_logical_blocksize;
void *key_data;
gfp_t old_gfp_mask;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 25f6a0c..2a5d52f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -568,7 +568,6 @@ struct request_queue {
#if defined(CONFIG_BLK_DEV_BSG)
bsg_job_fn *bsg_job_fn;
- int bsg_job_size;
struct bsg_class_device bsg_dev;
#endif
diff --git a/include/linux/bsg-lib.h b/include/linux/bsg-lib.h
index e34dde2..637a20c 100644
--- a/include/linux/bsg-lib.h
+++ b/include/linux/bsg-lib.h
@@ -24,6 +24,7 @@
#define _BLK_BSG_
#include <linux/blkdev.h>
+#include <scsi/scsi_request.h>
struct request;
struct device;
@@ -37,6 +38,7 @@ struct bsg_buffer {
};
struct bsg_job {
+ struct scsi_request sreq;
struct device *dev;
struct request *req;
diff --git a/include/uapi/linux/loop.h b/include/uapi/linux/loop.h
index a3960f9..c8125ec 100644
--- a/include/uapi/linux/loop.h
+++ b/include/uapi/linux/loop.h
@@ -22,7 +22,6 @@ enum {
LO_FLAGS_AUTOCLEAR = 4,
LO_FLAGS_PARTSCAN = 8,
LO_FLAGS_DIRECT_IO = 16,
- LO_FLAGS_BLOCKSIZE = 32,
};
#include <asm/posix_types.h> /* for __kernel_old_dev_t */
@@ -60,8 +59,6 @@ struct loop_info64 {
__u64 lo_init[2];
};
-#define LO_INFO_BLOCKSIZE(l) (l)->lo_init[0]
-
/*
* Loop filter types
*/