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for-6.1/passthrough-2022-10-04

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Merge tag 'for-6.1/passthrough-2022-10-04' of git://git.kernel.dk/linux

Pull passthrough updates from Jens Axboe:
 "With these changes, passthrough NVMe support over io_uring now
  performs at the same level as block device O_DIRECT, and in many cases
  6-8% better.

  This contains:

   - Add support for fixed buffers for passthrough (Anuj, Kanchan)

   - Enable batched allocations and freeing on passthrough, similarly to
     what we support on the normal storage path (me)

   - Fix from Geert fixing an issue with !CONFIG_IO_URING"

* tag 'for-6.1/passthrough-2022-10-04' of git://git.kernel.dk/linux:
  io_uring: Add missing inline to io_uring_cmd_import_fixed() dummy
  nvme: wire up fixed buffer support for nvme passthrough
  nvme: pass ubuffer as an integer
  block: extend functionality to map bvec iterator
  block: factor out blk_rq_map_bio_alloc helper
  block: rename bio_map_put to blk_mq_map_bio_put
  nvme: refactor nvme_alloc_request
  nvme: refactor nvme_add_user_metadata
  nvme: Use blk_rq_map_user_io helper
  scsi: Use blk_rq_map_user_io helper
  block: add blk_rq_map_user_io
  io_uring: introduce fixed buffer support for io_uring_cmd
  io_uring: add io_uring_cmd_import_fixed
  nvme: enable batched completions of passthrough IO
  nvme: split out metadata vs non metadata end_io uring_cmd completions
  block: allow end_io based requests in the completion batch handling
  block: change request end_io handler to pass back a return value
  block: enable batched allocation for blk_mq_alloc_request()
  block: kill deprecated BUG_ON() in the flush handling
This commit is contained in:
Linus Torvalds 2022-10-07 09:35:50 -07:00
commit 7c989b1da3
18 changed files with 478 additions and 183 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
block/blk-flush.c
View File

@ -205,7 +205,6 @@ static void blk_flush_complete_seq(struct request *rq,
* flush data request completion path. Restore @rq for
* normal completion and end it.
*/
BUG_ON(!list_empty(&rq->queuelist));
list_del_init(&rq->flush.list);
blk_flush_restore_request(rq);
blk_mq_end_request(rq, error);
@ -218,7 +217,8 @@ static void blk_flush_complete_seq(struct request *rq,
blk_kick_flush(q, fq, cmd_flags);
}
static void flush_end_io(struct request *flush_rq, blk_status_t error)
static enum rq_end_io_ret flush_end_io(struct request *flush_rq,
blk_status_t error)
{
struct request_queue *q = flush_rq->q;
struct list_head *running;
@ -232,7 +232,7 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error)
if (!req_ref_put_and_test(flush_rq)) {
fq->rq_status = error;
spin_unlock_irqrestore(&fq->mq_flush_lock, flags);
return;
return RQ_END_IO_NONE;
}
blk_account_io_flush(flush_rq);
@ -269,6 +269,7 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error)
}
spin_unlock_irqrestore(&fq->mq_flush_lock, flags);
return RQ_END_IO_NONE;
}
bool is_flush_rq(struct request *rq)
@ -354,7 +355,8 @@ static void blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq,
blk_flush_queue_rq(flush_rq, false);
}
static void mq_flush_data_end_io(struct request *rq, blk_status_t error)
static enum rq_end_io_ret mq_flush_data_end_io(struct request *rq,
blk_status_t error)
{
struct request_queue *q = rq->q;
struct blk_mq_hw_ctx *hctx = rq->mq_hctx;
@ -376,6 +378,7 @@ static void mq_flush_data_end_io(struct request *rq, blk_status_t error)
spin_unlock_irqrestore(&fq->mq_flush_lock, flags);
blk_mq_sched_restart(hctx);
return RQ_END_IO_NONE;
}
/**

154
block/blk-map.c
View File

@ -231,7 +231,7 @@ static int bio_copy_user_iov(struct request *rq, struct rq_map_data *map_data,
return ret;
}
static void bio_map_put(struct bio *bio)
static void blk_mq_map_bio_put(struct bio *bio)
{
if (bio->bi_opf & REQ_ALLOC_CACHE) {
bio_put(bio);
@ -241,6 +241,27 @@ static void bio_map_put(struct bio *bio)
}
}
static struct bio *blk_rq_map_bio_alloc(struct request *rq,
unsigned int nr_vecs, gfp_t gfp_mask)
{
struct bio *bio;
if (rq->cmd_flags & REQ_POLLED) {
blk_opf_t opf = rq->cmd_flags | REQ_ALLOC_CACHE;
bio = bio_alloc_bioset(NULL, nr_vecs, opf, gfp_mask,
&fs_bio_set);
if (!bio)
return NULL;
} else {
bio = bio_kmalloc(nr_vecs, gfp_mask);
if (!bio)
return NULL;
bio_init(bio, NULL, bio->bi_inline_vecs, nr_vecs, req_op(rq));
}
return bio;
}
static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
gfp_t gfp_mask)
{
@ -253,19 +274,9 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
if (!iov_iter_count(iter))
return -EINVAL;
if (rq->cmd_flags & REQ_POLLED) {
blk_opf_t opf = rq->cmd_flags | REQ_ALLOC_CACHE;
bio = bio_alloc_bioset(NULL, nr_vecs, opf, gfp_mask,
&fs_bio_set);
if (!bio)
return -ENOMEM;
} else {
bio = bio_kmalloc(nr_vecs, gfp_mask);
if (!bio)
return -ENOMEM;
bio_init(bio, NULL, bio->bi_inline_vecs, nr_vecs, req_op(rq));
}
bio = blk_rq_map_bio_alloc(rq, nr_vecs, gfp_mask);
if (bio == NULL)
return -ENOMEM;
while (iov_iter_count(iter)) {
struct page **pages, *stack_pages[UIO_FASTIOV];
@ -331,7 +342,7 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
out_unmap:
bio_release_pages(bio, false);
bio_map_put(bio);
blk_mq_map_bio_put(bio);
return ret;
}
@ -537,6 +548,62 @@ int blk_rq_append_bio(struct request *rq, struct bio *bio)
}
EXPORT_SYMBOL(blk_rq_append_bio);
/* Prepare bio for passthrough IO given ITER_BVEC iter */
static int blk_rq_map_user_bvec(struct request *rq, const struct iov_iter *iter)
{
struct request_queue *q = rq->q;
size_t nr_iter = iov_iter_count(iter);
size_t nr_segs = iter->nr_segs;
struct bio_vec *bvecs, *bvprvp = NULL;
struct queue_limits *lim = &q->limits;
unsigned int nsegs = 0, bytes = 0;
struct bio *bio;
size_t i;
if (!nr_iter || (nr_iter >> SECTOR_SHIFT) > queue_max_hw_sectors(q))
return -EINVAL;
if (nr_segs > queue_max_segments(q))
return -EINVAL;
/* no iovecs to alloc, as we already have a BVEC iterator */
bio = blk_rq_map_bio_alloc(rq, 0, GFP_KERNEL);
if (bio == NULL)
return -ENOMEM;
bio_iov_bvec_set(bio, (struct iov_iter *)iter);
blk_rq_bio_prep(rq, bio, nr_segs);
/* loop to perform a bunch of sanity checks */
bvecs = (struct bio_vec *)iter->bvec;
for (i = 0; i < nr_segs; i++) {
struct bio_vec *bv = &bvecs[i];
/*
* If the queue doesn't support SG gaps and adding this
* offset would create a gap, fallback to copy.
*/
if (bvprvp && bvec_gap_to_prev(lim, bvprvp, bv->bv_offset)) {
blk_mq_map_bio_put(bio);
return -EREMOTEIO;
}
/* check full condition */
if (nsegs >= nr_segs || bytes > UINT_MAX - bv->bv_len)
goto put_bio;
if (bytes + bv->bv_len > nr_iter)
goto put_bio;
if (bv->bv_offset + bv->bv_len > PAGE_SIZE)
goto put_bio;
nsegs++;
bytes += bv->bv_len;
bvprvp = bv;
}
return 0;
put_bio:
blk_mq_map_bio_put(bio);
return -EINVAL;
}
/**
* blk_rq_map_user_iov - map user data to a request, for passthrough requests
* @q: request queue where request should be inserted
@ -556,24 +623,35 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
struct rq_map_data *map_data,
const struct iov_iter *iter, gfp_t gfp_mask)
{
bool copy = false;
bool copy = false, map_bvec = false;
unsigned long align = q->dma_pad_mask | queue_dma_alignment(q);
struct bio *bio = NULL;
struct iov_iter i;
int ret = -EINVAL;
if (!iter_is_iovec(iter))
goto fail;
if (map_data)
copy = true;
else if (blk_queue_may_bounce(q))
copy = true;
else if (iov_iter_alignment(iter) & align)
copy = true;
else if (iov_iter_is_bvec(iter))
map_bvec = true;
else if (!iter_is_iovec(iter))
copy = true;
else if (queue_virt_boundary(q))
copy = queue_virt_boundary(q) & iov_iter_gap_alignment(iter);
if (map_bvec) {
ret = blk_rq_map_user_bvec(rq, iter);
if (!ret)
return 0;
if (ret != -EREMOTEIO)
goto fail;
/* fall back to copying the data on limits mismatches */
copy = true;
}
i = *iter;
do {
if (copy)
@ -611,6 +689,42 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq,
}
EXPORT_SYMBOL(blk_rq_map_user);
int blk_rq_map_user_io(struct request *req, struct rq_map_data *map_data,
void __user *ubuf, unsigned long buf_len, gfp_t gfp_mask,
bool vec, int iov_count, bool check_iter_count, int rw)
{
int ret = 0;
if (vec) {
struct iovec fast_iov[UIO_FASTIOV];
struct iovec *iov = fast_iov;
struct iov_iter iter;
ret = import_iovec(rw, ubuf, iov_count ? iov_count : buf_len,
UIO_FASTIOV, &iov, &iter);
if (ret < 0)
return ret;
if (iov_count) {
/* SG_IO howto says that the shorter of the two wins */
iov_iter_truncate(&iter, buf_len);
if (check_iter_count && !iov_iter_count(&iter)) {
kfree(iov);
return -EINVAL;
}
}
ret = blk_rq_map_user_iov(req->q, req, map_data, &iter,
gfp_mask);
kfree(iov);
} else if (buf_len) {
ret = blk_rq_map_user(req->q, req, map_data, ubuf, buf_len,
gfp_mask);
}
return ret;
}
EXPORT_SYMBOL(blk_rq_map_user_io);
/**
* blk_rq_unmap_user - unmap a request with user data
* @bio: start of bio list
@ -636,7 +750,7 @@ int blk_rq_unmap_user(struct bio *bio)
next_bio = bio;
bio = bio->bi_next;
bio_map_put(next_bio);
blk_mq_map_bio_put(next_bio);
}
return ret;

107
block/blk-mq.c
View File

@ -510,25 +510,87 @@ static struct request *__blk_mq_alloc_requests(struct blk_mq_alloc_data *data)
alloc_time_ns);
}
struct request *blk_mq_alloc_request(struct request_queue *q, blk_opf_t opf,
blk_mq_req_flags_t flags)
static struct request *blk_mq_rq_cache_fill(struct request_queue *q,
struct blk_plug *plug,
blk_opf_t opf,
blk_mq_req_flags_t flags)
{
struct blk_mq_alloc_data data = {
.q = q,
.flags = flags,
.cmd_flags = opf,
.nr_tags = 1,
.nr_tags = plug->nr_ios,
.cached_rq = &plug->cached_rq,
};
struct request *rq;
int ret;
ret = blk_queue_enter(q, flags);
if (ret)
return ERR_PTR(ret);
if (blk_queue_enter(q, flags))
return NULL;
plug->nr_ios = 1;
rq = __blk_mq_alloc_requests(&data);
if (!rq)
goto out_queue_exit;
if (unlikely(!rq))
blk_queue_exit(q);
return rq;
}
static struct request *blk_mq_alloc_cached_request(struct request_queue *q,
blk_opf_t opf,
blk_mq_req_flags_t flags)
{
struct blk_plug *plug = current->plug;
struct request *rq;
if (!plug)
return NULL;
if (rq_list_empty(plug->cached_rq)) {
if (plug->nr_ios == 1)
return NULL;
rq = blk_mq_rq_cache_fill(q, plug, opf, flags);
if (rq)
goto got_it;
return NULL;
}
rq = rq_list_peek(&plug->cached_rq);
if (!rq || rq->q != q)
return NULL;
if (blk_mq_get_hctx_type(opf) != rq->mq_hctx->type)
return NULL;
if (op_is_flush(rq->cmd_flags) != op_is_flush(opf))
return NULL;
plug->cached_rq = rq_list_next(rq);
got_it:
rq->cmd_flags = opf;
INIT_LIST_HEAD(&rq->queuelist);
return rq;
}
struct request *blk_mq_alloc_request(struct request_queue *q, blk_opf_t opf,
blk_mq_req_flags_t flags)
{
struct request *rq;
rq = blk_mq_alloc_cached_request(q, opf, flags);
if (!rq) {
struct blk_mq_alloc_data data = {
.q = q,
.flags = flags,
.cmd_flags = opf,
.nr_tags = 1,
};
int ret;
ret = blk_queue_enter(q, flags);
if (ret)
return ERR_PTR(ret);
rq = __blk_mq_alloc_requests(&data);
if (!rq)
goto out_queue_exit;
}
rq->__data_len = 0;
rq->__sector = (sector_t) -1;
rq->bio = rq->biotail = NULL;
@ -761,8 +823,10 @@ static void blk_complete_request(struct request *req)
* can find how many bytes remain in the request
* later.
*/
req->bio = NULL;
req->__data_len = 0;
if (!req->end_io) {
req->bio = NULL;
req->__data_len = 0;
}
}
/**
@ -939,7 +1003,8 @@ inline void __blk_mq_end_request(struct request *rq, blk_status_t error)
if (rq->end_io) {
rq_qos_done(rq->q, rq);
rq->end_io(rq, error);
if (rq->end_io(rq, error) == RQ_END_IO_FREE)
blk_mq_free_request(rq);
} else {
blk_mq_free_request(rq);
}
@ -992,6 +1057,13 @@ void blk_mq_end_request_batch(struct io_comp_batch *iob)
rq_qos_done(rq->q, rq);
/*
* If end_io handler returns NONE, then it still has
* ownership of the request.
*/
if (rq->end_io && rq->end_io(rq, 0) == RQ_END_IO_NONE)
continue;
WRITE_ONCE(rq->state, MQ_RQ_IDLE);
if (!req_ref_put_and_test(rq))
continue;
@ -1233,12 +1305,13 @@ struct blk_rq_wait {
blk_status_t ret;
};
static void blk_end_sync_rq(struct request *rq, blk_status_t ret)
static enum rq_end_io_ret blk_end_sync_rq(struct request *rq, blk_status_t ret)
{
struct blk_rq_wait *wait = rq->end_io_data;
wait->ret = ret;
complete(&wait->done);
return RQ_END_IO_NONE;
}
bool blk_rq_is_poll(struct request *rq)
@ -1472,10 +1545,12 @@ static bool blk_mq_req_expired(struct request *rq, unsigned long *next)
void blk_mq_put_rq_ref(struct request *rq)
{
if (is_flush_rq(rq))
rq->end_io(rq, 0);
else if (req_ref_put_and_test(rq))
if (is_flush_rq(rq)) {
if (rq->end_io(rq, 0) == RQ_END_IO_FREE)
blk_mq_free_request(rq);
} else if (req_ref_put_and_test(rq)) {
__blk_mq_free_request(rq);
}
}
static bool blk_mq_check_expired(struct request *rq, void *priv)

4
drivers/md/dm-rq.c
View File

@ -292,11 +292,13 @@ static void dm_kill_unmapped_request(struct request *rq, blk_status_t error)
dm_complete_request(rq, error);
}
static void end_clone_request(struct request *clone, blk_status_t error)
static enum rq_end_io_ret end_clone_request(struct request *clone,
blk_status_t error)
{
struct dm_rq_target_io *tio = clone->end_io_data;
dm_complete_request(tio->orig, error);
return RQ_END_IO_NONE;
}
static int dm_rq_bio_constructor(struct bio *bio, struct bio *bio_orig,

6
drivers/nvme/host/core.c
View File

@ -1172,7 +1172,8 @@ static void nvme_queue_keep_alive_work(struct nvme_ctrl *ctrl)
queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ / 2);
}
static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status)
static enum rq_end_io_ret nvme_keep_alive_end_io(struct request *rq,
blk_status_t status)
{
struct nvme_ctrl *ctrl = rq->end_io_data;
unsigned long flags;
@ -1184,7 +1185,7 @@ static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status)
dev_err(ctrl->device,
"failed nvme_keep_alive_end_io error=%d\n",
status);
return;
return RQ_END_IO_NONE;
}
ctrl->comp_seen = false;
@ -1195,6 +1196,7 @@ static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status)
spin_unlock_irqrestore(&ctrl->lock, flags);
if (startka)
nvme_queue_keep_alive_work(ctrl);
return RQ_END_IO_NONE;
}
static void nvme_keep_alive_work(struct work_struct *work)

227
drivers/nvme/host/ioctl.c
View File

@ -20,19 +20,20 @@ static void __user *nvme_to_user_ptr(uintptr_t ptrval)
return (void __user *)ptrval;
}
static void *nvme_add_user_metadata(struct bio *bio, void __user *ubuf,
unsigned len, u32 seed, bool write)
static void *nvme_add_user_metadata(struct request *req, void __user *ubuf,
unsigned len, u32 seed)
{
struct bio_integrity_payload *bip;
int ret = -ENOMEM;
void *buf;
struct bio *bio = req->bio;
buf = kmalloc(len, GFP_KERNEL);
if (!buf)
goto out;
ret = -EFAULT;
if (write && copy_from_user(buf, ubuf, len))
if ((req_op(req) == REQ_OP_DRV_OUT) && copy_from_user(buf, ubuf, len))
goto out_free_meta;
bip = bio_integrity_alloc(bio, GFP_KERNEL, 1);
@ -45,9 +46,13 @@ static void *nvme_add_user_metadata(struct bio *bio, void __user *ubuf,
bip->bip_iter.bi_sector = seed;
ret = bio_integrity_add_page(bio, virt_to_page(buf), len,
offset_in_page(buf));
if (ret == len)
return buf;
ret = -ENOMEM;
if (ret != len) {
ret = -ENOMEM;
goto out_free_meta;
}
req->cmd_flags |= REQ_INTEGRITY;
return buf;
out_free_meta:
kfree(buf);
out:
@ -65,74 +70,76 @@ static int nvme_finish_user_metadata(struct request *req, void __user *ubuf,
}
static struct request *nvme_alloc_user_request(struct request_queue *q,
struct nvme_command *cmd, void __user *ubuffer,
unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
u32 meta_seed, void **metap, unsigned timeout, bool vec,
blk_opf_t rq_flags, blk_mq_req_flags_t blk_flags)
struct nvme_command *cmd, blk_opf_t rq_flags,
blk_mq_req_flags_t blk_flags)
{
bool write = nvme_is_write(cmd);
struct nvme_ns *ns = q->queuedata;
struct block_device *bdev = ns ? ns->disk->part0 : NULL;
struct request *req;
struct bio *bio = NULL;
void *meta = NULL;
int ret;
req = blk_mq_alloc_request(q, nvme_req_op(cmd) | rq_flags, blk_flags);
if (IS_ERR(req))
return req;
nvme_init_request(req, cmd);
if (timeout)
req->timeout = timeout;
nvme_req(req)->flags |= NVME_REQ_USERCMD;
return req;
}
if (ubuffer && bufflen) {
if (!vec)
ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen,
GFP_KERNEL);
else {
struct iovec fast_iov[UIO_FASTIOV];
struct iovec *iov = fast_iov;
struct iov_iter iter;
static int nvme_map_user_request(struct request *req, u64 ubuffer,
unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
u32 meta_seed, void **metap, struct io_uring_cmd *ioucmd,
bool vec)
{
struct request_queue *q = req->q;
struct nvme_ns *ns = q->queuedata;
struct block_device *bdev = ns ? ns->disk->part0 : NULL;
struct bio *bio = NULL;
void *meta = NULL;
int ret;
ret = import_iovec(rq_data_dir(req), ubuffer, bufflen,
UIO_FASTIOV, &iov, &iter);
if (ret < 0)
goto out;
ret = blk_rq_map_user_iov(q, req, NULL, &iter,
GFP_KERNEL);
kfree(iov);
}
if (ret)
if (ioucmd && (ioucmd->flags & IORING_URING_CMD_FIXED)) {
struct iov_iter iter;
/* fixedbufs is only for non-vectored io */
if (WARN_ON_ONCE(vec))
return -EINVAL;
ret = io_uring_cmd_import_fixed(ubuffer, bufflen,
rq_data_dir(req), &iter, ioucmd);
if (ret < 0)
goto out;
bio = req->bio;
if (bdev)
bio_set_dev(bio, bdev);
if (bdev && meta_buffer && meta_len) {
meta = nvme_add_user_metadata(bio, meta_buffer, meta_len,
meta_seed, write);
if (IS_ERR(meta)) {
ret = PTR_ERR(meta);
goto out_unmap;
}
req->cmd_flags |= REQ_INTEGRITY;
*metap = meta;
}
ret = blk_rq_map_user_iov(q, req, NULL, &iter, GFP_KERNEL);
} else {
ret = blk_rq_map_user_io(req, NULL, nvme_to_user_ptr(ubuffer),
bufflen, GFP_KERNEL, vec, 0, 0,
rq_data_dir(req));
}
return req;
if (ret)
goto out;
bio = req->bio;
if (bdev)
bio_set_dev(bio, bdev);
if (bdev && meta_buffer && meta_len) {
meta = nvme_add_user_metadata(req, meta_buffer, meta_len,
meta_seed);
if (IS_ERR(meta)) {
ret = PTR_ERR(meta);
goto out_unmap;
}
*metap = meta;
}
return ret;
out_unmap:
if (bio)
blk_rq_unmap_user(bio);
out:
blk_mq_free_request(req);
return ERR_PTR(ret);
return ret;
}
static int nvme_submit_user_cmd(struct request_queue *q,
struct nvme_command *cmd, void __user *ubuffer,
struct nvme_command *cmd, u64 ubuffer,
unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
u32 meta_seed, u64 *result, unsigned timeout, bool vec)
{
@ -143,11 +150,18 @@ static int nvme_submit_user_cmd(struct request_queue *q,
u32 effects;
int ret;
req = nvme_alloc_user_request(q, cmd, ubuffer, bufflen, meta_buffer,
meta_len, meta_seed, &meta, timeout, vec, 0, 0);
req = nvme_alloc_user_request(q, cmd, 0, 0);
if (IS_ERR(req))
return PTR_ERR(req);
req->timeout = timeout;
if (ubuffer && bufflen) {
ret = nvme_map_user_request(req, ubuffer, bufflen, meta_buffer,
meta_len, meta_seed, &meta, NULL, vec);
if (ret)
return ret;
}
bio = req->bio;
ctrl = nvme_req(req)->ctrl;
@ -227,7 +241,7 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
c.rw.appmask = cpu_to_le16(io.appmask);
return nvme_submit_user_cmd(ns->queue, &c,
nvme_to_user_ptr(io.addr), length,
io.addr, length,
metadata, meta_len, lower_32_bits(io.slba), NULL, 0,
false);
}
@ -281,7 +295,7 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
timeout = msecs_to_jiffies(cmd.timeout_ms);
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
nvme_to_user_ptr(cmd.addr), cmd.data_len,
cmd.addr, cmd.data_len,
nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
0, &result, timeout, false);
@ -327,7 +341,7 @@ static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
timeout = msecs_to_jiffies(cmd.timeout_ms);
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
nvme_to_user_ptr(cmd.addr), cmd.data_len,
cmd.addr, cmd.data_len,
nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
0, &cmd.result, timeout, vec);
@ -356,9 +370,15 @@ struct nvme_uring_cmd_pdu {
struct bio *bio;
struct request *req;
};
void *meta; /* kernel-resident buffer */
void __user *meta_buffer;
u32 meta_len;
u32 nvme_status;
union {
struct {
void *meta; /* kernel-resident buffer */
void __user *meta_buffer;
};
u64 result;
} u;
};
static inline struct nvme_uring_cmd_pdu *nvme_uring_cmd_pdu(
@ -367,11 +387,10 @@ static inline struct nvme_uring_cmd_pdu *nvme_uring_cmd_pdu(
return (struct nvme_uring_cmd_pdu *)&ioucmd->pdu;
}
static void nvme_uring_task_cb(struct io_uring_cmd *ioucmd)
static void nvme_uring_task_meta_cb(struct io_uring_cmd *ioucmd)
{
struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd);
struct request *req = pdu->req;
struct bio *bio = req->bio;
int status;
u64 result;
@ -382,26 +401,39 @@ static void nvme_uring_task_cb(struct io_uring_cmd *ioucmd)
result = le64_to_cpu(nvme_req(req)->result.u64);
if (pdu->meta)
status = nvme_finish_user_metadata(req, pdu->meta_buffer,
pdu->meta, pdu->meta_len, status);
if (bio)
blk_rq_unmap_user(bio);
if (pdu->meta_len)
status = nvme_finish_user_metadata(req, pdu->u.meta_buffer,
pdu->u.meta, pdu->meta_len, status);
if (req->bio)
blk_rq_unmap_user(req->bio);
blk_mq_free_request(req);
io_uring_cmd_done(ioucmd, status, result);
}
static void nvme_uring_cmd_end_io(struct request *req, blk_status_t err)
static void nvme_uring_task_cb(struct io_uring_cmd *ioucmd)
{
struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd);
if (pdu->bio)
blk_rq_unmap_user(pdu->bio);
io_uring_cmd_done(ioucmd, pdu->nvme_status, pdu->u.result);
}
static enum rq_end_io_ret nvme_uring_cmd_end_io(struct request *req,
blk_status_t err)
{
struct io_uring_cmd *ioucmd = req->end_io_data;
struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd);
/* extract bio before reusing the same field for request */
struct bio *bio = pdu->bio;
void *cookie = READ_ONCE(ioucmd->cookie);
pdu->req = req;
req->bio = bio;
req->bio = pdu->bio;
if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
pdu->nvme_status = -EINTR;
else
pdu->nvme_status = nvme_req(req)->status;
pdu->u.result = le64_to_cpu(nvme_req(req)->result.u64);
/*
* For iopoll, complete it directly.
@ -411,6 +443,30 @@ static void nvme_uring_cmd_end_io(struct request *req, blk_status_t err)
nvme_uring_task_cb(ioucmd);
else
io_uring_cmd_complete_in_task(ioucmd, nvme_uring_task_cb);
return RQ_END_IO_FREE;
}
static enum rq_end_io_ret nvme_uring_cmd_end_io_meta(struct request *req,
blk_status_t err)
{
struct io_uring_cmd *ioucmd = req->end_io_data;
struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd);
void *cookie = READ_ONCE(ioucmd->cookie);
req->bio = pdu->bio;
pdu->req = req;
/*
* For iopoll, complete it directly.
* Otherwise, move the completion to task work.
*/
if (cookie != NULL && blk_rq_is_poll(req))
nvme_uring_task_meta_cb(ioucmd);
else
io_uring_cmd_complete_in_task(ioucmd, nvme_uring_task_meta_cb);
return RQ_END_IO_NONE;
}
static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
@ -425,6 +481,7 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
blk_opf_t rq_flags = 0;
blk_mq_req_flags_t blk_flags = 0;
void *meta = NULL;
int ret;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
@ -464,15 +521,18 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
rq_flags |= REQ_POLLED;
retry:
req = nvme_alloc_user_request(q, &c, nvme_to_user_ptr(d.addr),
d.data_len, nvme_to_user_ptr(d.metadata),
d.metadata_len, 0, &meta, d.timeout_ms ?
msecs_to_jiffies(d.timeout_ms) : 0, vec, rq_flags,
blk_flags);
req = nvme_alloc_user_request(q, &c, rq_flags, blk_flags);
if (IS_ERR(req))
return PTR_ERR(req);
req->end_io = nvme_uring_cmd_end_io;
req->end_io_data = ioucmd;
req->timeout = d.timeout_ms ? msecs_to_jiffies(d.timeout_ms) : 0;
if (d.addr && d.data_len) {
ret = nvme_map_user_request(req, d.addr,
d.data_len, nvme_to_user_ptr(d.metadata),
d.metadata_len, 0, &meta, ioucmd, vec);
if (ret)
return ret;
}
if (issue_flags & IO_URING_F_IOPOLL && rq_flags & REQ_POLLED) {
if (unlikely(!req->bio)) {
@ -487,10 +547,15 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
}
/* to free bio on completion, as req->bio will be null at that time */
pdu->bio = req->bio;
pdu->meta = meta;
pdu->meta_buffer = nvme_to_user_ptr(d.metadata);
pdu->meta_len = d.metadata_len;
req->end_io_data = ioucmd;
if (pdu->meta_len) {
pdu->u.meta = meta;
pdu->u.meta_buffer = nvme_to_user_ptr(d.metadata);
req->end_io = nvme_uring_cmd_end_io_meta;
} else {
req->end_io = nvme_uring_cmd_end_io;
}
blk_execute_rq_nowait(req, false);
return -EIOCBQUEUED;
}

12
drivers/nvme/host/pci.c
View File

@ -1268,7 +1268,7 @@ static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid)
return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid);
}
static void abort_endio(struct request *req, blk_status_t error)
static enum rq_end_io_ret abort_endio(struct request *req, blk_status_t error)
{
struct nvme_queue *nvmeq = req->mq_hctx->driver_data;
@ -1276,6 +1276,7 @@ static void abort_endio(struct request *req, blk_status_t error)
"Abort status: 0x%x", nvme_req(req)->status);
atomic_inc(&nvmeq->dev->ctrl.abort_limit);
blk_mq_free_request(req);
return RQ_END_IO_NONE;
}
static bool nvme_should_reset(struct nvme_dev *dev, u32 csts)
@ -2447,22 +2448,25 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
return result;
}
static void nvme_del_queue_end(struct request *req, blk_status_t error)
static enum rq_end_io_ret nvme_del_queue_end(struct request *req,
blk_status_t error)
{
struct nvme_queue *nvmeq = req->end_io_data;
blk_mq_free_request(req);
complete(&nvmeq->delete_done);
return RQ_END_IO_NONE;
}
static void nvme_del_cq_end(struct request *req, blk_status_t error)
static enum rq_end_io_ret nvme_del_cq_end(struct request *req,
blk_status_t error)
{
struct nvme_queue *nvmeq = req->end_io_data;
if (error)
set_bit(NVMEQ_DELETE_ERROR, &nvmeq->flags);
nvme_del_queue_end(req, error);
return nvme_del_queue_end(req, error);
}
static int nvme_delete_queue(struct nvme_queue *nvmeq, u8 opcode)

5
drivers/nvme/target/passthru.c
View File

@ -245,14 +245,15 @@ static void nvmet_passthru_execute_cmd_work(struct work_struct *w)
nvme_passthru_end(ctrl, effects, req->cmd, status);
}
static void nvmet_passthru_req_done(struct request *rq,
blk_status_t blk_status)
static enum rq_end_io_ret nvmet_passthru_req_done(struct request *rq,
blk_status_t blk_status)
{
struct nvmet_req *req = rq->end_io_data;
req->cqe->result = nvme_req(rq)->result;
nvmet_req_complete(req, nvme_req(rq)->status);
blk_mq_free_request(rq);
return RQ_END_IO_NONE;
}
static int nvmet_passthru_map_sg(struct nvmet_req *req, struct request *rq)

4
drivers/scsi/scsi_error.c
View File

@ -2004,9 +2004,11 @@ enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *scmd)
}
}
static void eh_lock_door_done(struct request *req, blk_status_t status)
static enum rq_end_io_ret eh_lock_door_done(struct request *req,
blk_status_t status)
{
blk_mq_free_request(req);
return RQ_END_IO_NONE;
}
/**

22
drivers/scsi/scsi_ioctl.c
View File

@ -449,25 +449,9 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
if (ret < 0)
goto out_put_request;
ret = 0;
if (hdr->iovec_count && hdr->dxfer_len) {
struct iov_iter i;
struct iovec *iov = NULL;
ret = import_iovec(rq_data_dir(rq), hdr->dxferp,
hdr->iovec_count, 0, &iov, &i);
if (ret < 0)
goto out_put_request;
/* SG_IO howto says that the shorter of the two wins */
iov_iter_truncate(&i, hdr->dxfer_len);
ret = blk_rq_map_user_iov(rq->q, rq, NULL, &i, GFP_KERNEL);
kfree(iov);
} else if (hdr->dxfer_len)
ret = blk_rq_map_user(rq->q, rq, NULL, hdr->dxferp,
hdr->dxfer_len, GFP_KERNEL);
ret = blk_rq_map_user_io(rq, NULL, hdr->dxferp, hdr->dxfer_len,
GFP_KERNEL, hdr->iovec_count && hdr->dxfer_len,
hdr->iovec_count, 0, rq_data_dir(rq));
if (ret)
goto out_put_request;

31
drivers/scsi/sg.c
View File

@ -177,7 +177,7 @@ typedef struct sg_device { /* holds the state of each scsi generic device */
} Sg_device;
/* tasklet or soft irq callback */
static void sg_rq_end_io(struct request *rq, blk_status_t status);
static enum rq_end_io_ret sg_rq_end_io(struct request *rq, blk_status_t status);
static int sg_start_req(Sg_request *srp, unsigned char *cmd);
static int sg_finish_rem_req(Sg_request * srp);
static int sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size);
@ -1311,7 +1311,7 @@ sg_rq_end_io_usercontext(struct work_struct *work)
* This function is a "bottom half" handler that is called by the mid
* level when a command is completed (or has failed).
*/
static void
static enum rq_end_io_ret
sg_rq_end_io(struct request *rq, blk_status_t status)
{
struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
@ -1324,11 +1324,11 @@ sg_rq_end_io(struct request *rq, blk_status_t status)
int result, resid, done = 1;
if (WARN_ON(srp->done != 0))
return;
return RQ_END_IO_NONE;
sfp = srp->parentfp;
if (WARN_ON(sfp == NULL))
return;
return RQ_END_IO_NONE;
sdp = sfp->parentdp;
if (unlikely(atomic_read(&sdp->detaching)))
@ -1406,6 +1406,7 @@ sg_rq_end_io(struct request *rq, blk_status_t status)
INIT_WORK(&srp->ew.work, sg_rq_end_io_usercontext);
schedule_work(&srp->ew.work);
}
return RQ_END_IO_NONE;
}
static const struct file_operations sg_fops = {
@ -1803,26 +1804,8 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
md->from_user = 0;
}
if (iov_count) {
struct iovec *iov = NULL;
struct iov_iter i;
res = import_iovec(rw, hp->dxferp, iov_count, 0, &iov, &i);
if (res < 0)
return res;
iov_iter_truncate(&i, hp->dxfer_len);
if (!iov_iter_count(&i)) {
kfree(iov);
return -EINVAL;
}
res = blk_rq_map_user_iov(q, rq, md, &i, GFP_ATOMIC);
kfree(iov);
} else
res = blk_rq_map_user(q, rq, md, hp->dxferp,
hp->dxfer_len, GFP_ATOMIC);
res = blk_rq_map_user_io(rq, md, hp->dxferp, hp->dxfer_len,
GFP_ATOMIC, iov_count, iov_count, 1, rw);
if (!res) {
srp->bio = rq->bio;

4
drivers/scsi/st.c
View File

@ -512,7 +512,8 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req)
atomic64_dec(&STp->stats->in_flight);
}
static void st_scsi_execute_end(struct request *req, blk_status_t status)
static enum rq_end_io_ret st_scsi_execute_end(struct request *req,
blk_status_t status)
{
struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
struct st_request *SRpnt = req->end_io_data;
@ -532,6 +533,7 @@ static void st_scsi_execute_end(struct request *req, blk_status_t status)
blk_rq_unmap_user(tmp);
blk_mq_free_request(req);
return RQ_END_IO_NONE;
}
static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,

6
drivers/target/target_core_pscsi.c
View File

@ -39,7 +39,7 @@ static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev)
}
static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd);
static void pscsi_req_done(struct request *, blk_status_t);
static enum rq_end_io_ret pscsi_req_done(struct request *, blk_status_t);
/* pscsi_attach_hba():
*
@ -1002,7 +1002,8 @@ static sector_t pscsi_get_blocks(struct se_device *dev)
return 0;
}
static void pscsi_req_done(struct request *req, blk_status_t status)
static enum rq_end_io_ret pscsi_req_done(struct request *req,
blk_status_t status)
{
struct se_cmd *cmd = req->end_io_data;
struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
@ -1029,6 +1030,7 @@ static void pscsi_req_done(struct request *req, blk_status_t status)
}
blk_mq_free_request(req);
return RQ_END_IO_NONE;
}
static const struct target_backend_ops pscsi_ops = {

8
drivers/ufs/core/ufshpb.c
View File

@ -613,14 +613,17 @@ static void ufshpb_activate_subregion(struct ufshpb_lu *hpb,
srgn->srgn_state = HPB_SRGN_VALID;
}
static void ufshpb_umap_req_compl_fn(struct request *req, blk_status_t error)
static enum rq_end_io_ret ufshpb_umap_req_compl_fn(struct request *req,
blk_status_t error)
{
struct ufshpb_req *umap_req = (struct ufshpb_req *)req->end_io_data;
ufshpb_put_req(umap_req->hpb, umap_req);
return RQ_END_IO_NONE;
}
static void ufshpb_map_req_compl_fn(struct request *req, blk_status_t error)
static enum rq_end_io_ret ufshpb_map_req_compl_fn(struct request *req,
blk_status_t error)
{
struct ufshpb_req *map_req = (struct ufshpb_req *) req->end_io_data;
struct ufshpb_lu *hpb = map_req->hpb;
@ -636,6 +639,7 @@ static void ufshpb_map_req_compl_fn(struct request *req, blk_status_t error)
spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
ufshpb_put_map_req(map_req->hpb, map_req);
return RQ_END_IO_NONE;
}
static void ufshpb_set_unmap_cmd(unsigned char *cdb, struct ufshpb_region *rgn)

12
include/linux/blk-mq.h
View File

@ -14,7 +14,12 @@ struct blk_flush_queue;
#define BLKDEV_MIN_RQ 4
#define BLKDEV_DEFAULT_RQ 128
typedef void (rq_end_io_fn)(struct request *, blk_status_t);
enum rq_end_io_ret {
RQ_END_IO_NONE,
RQ_END_IO_FREE,
};
typedef enum rq_end_io_ret (rq_end_io_fn)(struct request *, blk_status_t);
/*
* request flags */
@ -848,8 +853,9 @@ static inline bool blk_mq_add_to_batch(struct request *req,
struct io_comp_batch *iob, int ioerror,
void (*complete)(struct io_comp_batch *))
{
if (!iob || (req->rq_flags & RQF_ELV) || req->end_io || ioerror)
if (!iob || (req->rq_flags & RQF_ELV) || ioerror)
return false;
if (!iob->complete)
iob->complete = complete;
else if (iob->complete != complete)
@ -979,6 +985,8 @@ struct rq_map_data {
int blk_rq_map_user(struct request_queue *, struct request *,
struct rq_map_data *, void __user *, unsigned long, gfp_t);
int blk_rq_map_user_io(struct request *, struct rq_map_data *,
void __user *, unsigned long, gfp_t, bool, int, bool, int);
int blk_rq_map_user_iov(struct request_queue *, struct request *,
struct rq_map_data *, const struct iov_iter *, gfp_t);
int blk_rq_unmap_user(struct bio *);

10
include/linux/io_uring.h
View File

@ -4,6 +4,7 @@
#include <linux/sched.h>
#include <linux/xarray.h>
#include <uapi/linux/io_uring.h>
enum io_uring_cmd_flags {
IO_URING_F_COMPLETE_DEFER = 1,
@ -27,11 +28,13 @@ struct io_uring_cmd {
void *cookie;
};
u32 cmd_op;
u32 pad;
u32 flags;
u8 pdu[32]; /* available inline for free use */
};
#if defined(CONFIG_IO_URING)
int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
struct iov_iter *iter, void *ioucmd);
void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2);
void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
void (*task_work_cb)(struct io_uring_cmd *));
@ -59,6 +62,11 @@ static inline void io_uring_free(struct task_struct *tsk)
__io_uring_free(tsk);
}
#else
static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
struct iov_iter *iter, void *ioucmd)
{
return -EOPNOTSUPP;
}
static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
ssize_t ret2)
{

9
include/uapi/linux/io_uring.h
View File

@ -56,6 +56,7 @@ struct io_uring_sqe {
__u32 hardlink_flags;
__u32 xattr_flags;
__u32 msg_ring_flags;
__u32 uring_cmd_flags;
};
__u64 user_data; /* data to be passed back at completion time */
/* pack this to avoid bogus arm OABI complaints */
@ -219,6 +220,14 @@ enum io_uring_op {
IORING_OP_LAST,
};
/*
* sqe->uring_cmd_flags
* IORING_URING_CMD_FIXED use registered buffer; pass thig flag
* along with setting sqe->buf_index.
*/
#define IORING_URING_CMD_FIXED (1U << 0)
/*
* sqe->fsync_flags
*/

29
io_uring/uring_cmd.c
View File

@ -4,10 +4,12 @@
#include <linux/file.h>
#include <linux/io_uring.h>
#include <linux/security.h>
#include <linux/nospec.h>
#include <uapi/linux/io_uring.h>
#include "io_uring.h"
#include "rsrc.h"
#include "uring_cmd.h"
static void io_uring_cmd_work(struct io_kiocb *req, bool *locked)
@ -76,8 +78,24 @@ int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);
if (sqe->rw_flags || sqe->__pad1)
if (sqe->__pad1)
return -EINVAL;
ioucmd->flags = READ_ONCE(sqe->uring_cmd_flags);
if (ioucmd->flags & ~IORING_URING_CMD_FIXED)
return -EINVAL;
if (ioucmd->flags & IORING_URING_CMD_FIXED) {
struct io_ring_ctx *ctx = req->ctx;
u16 index;
req->buf_index = READ_ONCE(sqe->buf_index);
if (unlikely(req->buf_index >= ctx->nr_user_bufs))
return -EFAULT;
index = array_index_nospec(req->buf_index, ctx->nr_user_bufs);
req->imu = ctx->user_bufs[index];
io_req_set_rsrc_node(req, ctx, 0);
}
ioucmd->cmd = sqe->cmd;
ioucmd->cmd_op = READ_ONCE(sqe->cmd_op);
return 0;
@ -129,3 +147,12 @@ int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags)
return IOU_ISSUE_SKIP_COMPLETE;
}
int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
struct iov_iter *iter, void *ioucmd)
{
struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
return io_import_fixed(rw, iter, req->imu, ubuf, len);
}
EXPORT_SYMBOL_GPL(io_uring_cmd_import_fixed);