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-rw-r--r--drivers/block/rnbd/rnbd-clt-sysfs.c5
-rw-r--r--drivers/block/rnbd/rnbd-clt.c94
-rw-r--r--drivers/block/rnbd/rnbd-clt.h12
-rw-r--r--drivers/block/rnbd/rnbd-proto.h9
-rw-r--r--drivers/block/rnbd/rnbd-srv.c12
5 files changed, 87 insertions, 45 deletions
diff --git a/drivers/block/rnbd/rnbd-clt-sysfs.c b/drivers/block/rnbd/rnbd-clt-sysfs.c
index a7caeedeb198..d4aa6bfc9555 100644
--- a/drivers/block/rnbd/rnbd-clt-sysfs.c
+++ b/drivers/block/rnbd/rnbd-clt-sysfs.c
@@ -432,7 +432,7 @@ void rnbd_clt_remove_dev_symlink(struct rnbd_clt_dev *dev)
* i.e. rnbd_clt_unmap_dev_store() leading to a sysfs warning because
* of sysfs link already was removed already.
*/
- if (strlen(dev->blk_symlink_name) && try_module_get(THIS_MODULE)) {
+ if (dev->blk_symlink_name && try_module_get(THIS_MODULE)) {
sysfs_remove_link(rnbd_devs_kobj, dev->blk_symlink_name);
kfree(dev->blk_symlink_name);
module_put(THIS_MODULE);
@@ -521,7 +521,8 @@ static int rnbd_clt_add_dev_symlink(struct rnbd_clt_dev *dev)
return 0;
out_err:
- dev->blk_symlink_name[0] = '\0';
+ kfree(dev->blk_symlink_name);
+ dev->blk_symlink_name = NULL ;
return ret;
}
diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index a199b190c73d..96e3f9fe8241 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -88,6 +88,8 @@ static int rnbd_clt_set_dev_attr(struct rnbd_clt_dev *dev,
dev->discard_alignment = le32_to_cpu(rsp->discard_alignment);
dev->secure_discard = le16_to_cpu(rsp->secure_discard);
dev->rotational = rsp->rotational;
+ dev->wc = !!(rsp->cache_policy & RNBD_WRITEBACK);
+ dev->fua = !!(rsp->cache_policy & RNBD_FUA);
dev->max_hw_sectors = sess->max_io_size / SECTOR_SIZE;
dev->max_segments = BMAX_SEGMENTS;
@@ -347,19 +349,26 @@ static struct rnbd_iu *rnbd_get_iu(struct rnbd_clt_session *sess,
struct rnbd_iu *iu;
struct rtrs_permit *permit;
+ iu = kzalloc(sizeof(*iu), GFP_KERNEL);
+ if (!iu) {
+ return NULL;
+ }
+
permit = rnbd_get_permit(sess, con_type,
wait ? RTRS_PERMIT_WAIT :
RTRS_PERMIT_NOWAIT);
- if (unlikely(!permit))
+ if (unlikely(!permit)) {
+ kfree(iu);
return NULL;
- iu = rtrs_permit_to_pdu(permit);
+ }
+
iu->permit = permit;
/*
* 1st reference is dropped after finishing sending a "user" message,
* 2nd reference is dropped after confirmation with the response is
* returned.
* 1st and 2nd can happen in any order, so the rnbd_iu should be
- * released (rtrs_permit returned to ibbtrs) only leased after both
+ * released (rtrs_permit returned to rtrs) only after both
* are finished.
*/
atomic_set(&iu->refcount, 2);
@@ -371,8 +380,10 @@ static struct rnbd_iu *rnbd_get_iu(struct rnbd_clt_session *sess,
static void rnbd_put_iu(struct rnbd_clt_session *sess, struct rnbd_iu *iu)
{
- if (atomic_dec_and_test(&iu->refcount))
+ if (atomic_dec_and_test(&iu->refcount)) {
rnbd_put_permit(sess, iu->permit);
+ kfree(iu);
+ }
}
static void rnbd_softirq_done_fn(struct request *rq)
@@ -382,6 +393,7 @@ static void rnbd_softirq_done_fn(struct request *rq)
struct rnbd_iu *iu;
iu = blk_mq_rq_to_pdu(rq);
+ sg_free_table_chained(&iu->sgt, RNBD_INLINE_SG_CNT);
rnbd_put_permit(sess, iu->permit);
blk_mq_end_request(rq, errno_to_blk_status(iu->errno));
}
@@ -475,7 +487,7 @@ static int send_msg_close(struct rnbd_clt_dev *dev, u32 device_id, bool wait)
iu->buf = NULL;
iu->dev = dev;
- sg_mark_end(&iu->sglist[0]);
+ sg_alloc_table(&iu->sgt, 1, GFP_KERNEL);
msg.hdr.type = cpu_to_le16(RNBD_MSG_CLOSE);
msg.device_id = cpu_to_le32(device_id);
@@ -490,6 +502,7 @@ static int send_msg_close(struct rnbd_clt_dev *dev, u32 device_id, bool wait)
err = errno;
}
+ sg_free_table(&iu->sgt);
rnbd_put_iu(sess, iu);
return err;
}
@@ -562,7 +575,8 @@ static int send_msg_open(struct rnbd_clt_dev *dev, bool wait)
iu->buf = rsp;
iu->dev = dev;
- sg_init_one(iu->sglist, rsp, sizeof(*rsp));
+ sg_alloc_table(&iu->sgt, 1, GFP_KERNEL);
+ sg_init_one(iu->sgt.sgl, rsp, sizeof(*rsp));
msg.hdr.type = cpu_to_le16(RNBD_MSG_OPEN);
msg.access_mode = dev->access_mode;
@@ -570,7 +584,7 @@ static int send_msg_open(struct rnbd_clt_dev *dev, bool wait)
WARN_ON(!rnbd_clt_get_dev(dev));
err = send_usr_msg(sess->rtrs, READ, iu,
- &vec, sizeof(*rsp), iu->sglist, 1,
+ &vec, sizeof(*rsp), iu->sgt.sgl, 1,
msg_open_conf, &errno, wait);
if (err) {
rnbd_clt_put_dev(dev);
@@ -580,6 +594,7 @@ static int send_msg_open(struct rnbd_clt_dev *dev, bool wait)
err = errno;
}
+ sg_free_table(&iu->sgt);
rnbd_put_iu(sess, iu);
return err;
}
@@ -608,7 +623,8 @@ static int send_msg_sess_info(struct rnbd_clt_session *sess, bool wait)
iu->buf = rsp;
iu->sess = sess;
- sg_init_one(iu->sglist, rsp, sizeof(*rsp));
+ sg_alloc_table(&iu->sgt, 1, GFP_KERNEL);
+ sg_init_one(iu->sgt.sgl, rsp, sizeof(*rsp));
msg.hdr.type = cpu_to_le16(RNBD_MSG_SESS_INFO);
msg.ver = RNBD_PROTO_VER_MAJOR;
@@ -624,7 +640,7 @@ static int send_msg_sess_info(struct rnbd_clt_session *sess, bool wait)
goto put_iu;
}
err = send_usr_msg(sess->rtrs, READ, iu,
- &vec, sizeof(*rsp), iu->sglist, 1,
+ &vec, sizeof(*rsp), iu->sgt.sgl, 1,
msg_sess_info_conf, &errno, wait);
if (err) {
rnbd_clt_put_sess(sess);
@@ -634,7 +650,7 @@ put_iu:
} else {
err = errno;
}
-
+ sg_free_table(&iu->sgt);
rnbd_put_iu(sess, iu);
return err;
}
@@ -803,7 +819,7 @@ static struct rnbd_clt_session *alloc_sess(const char *sessname)
rnbd_init_cpu_qlists(sess->cpu_queues);
/*
- * That is simple percpu variable which stores cpu indeces, which are
+ * That is simple percpu variable which stores cpu indices, which are
* incremented on each access. We need that for the sake of fairness
* to wake up queues in a round-robin manner.
*/
@@ -1014,11 +1030,10 @@ static int rnbd_client_xfer_request(struct rnbd_clt_dev *dev,
* See queue limits.
*/
if (req_op(rq) != REQ_OP_DISCARD)
- sg_cnt = blk_rq_map_sg(dev->queue, rq, iu->sglist);
+ sg_cnt = blk_rq_map_sg(dev->queue, rq, iu->sgt.sgl);
if (sg_cnt == 0)
- /* Do not forget to mark the end */
- sg_mark_end(&iu->sglist[0]);
+ sg_mark_end(&iu->sgt.sgl[0]);
msg.hdr.type = cpu_to_le16(RNBD_MSG_IO);
msg.device_id = cpu_to_le32(dev->device_id);
@@ -1027,13 +1042,13 @@ static int rnbd_client_xfer_request(struct rnbd_clt_dev *dev,
.iov_base = &msg,
.iov_len = sizeof(msg)
};
- size = rnbd_clt_get_sg_size(iu->sglist, sg_cnt);
+ size = rnbd_clt_get_sg_size(iu->sgt.sgl, sg_cnt);
req_ops = (struct rtrs_clt_req_ops) {
.priv = iu,
.conf_fn = msg_io_conf,
};
err = rtrs_clt_request(rq_data_dir(rq), &req_ops, rtrs, permit,
- &vec, 1, size, iu->sglist, sg_cnt);
+ &vec, 1, size, iu->sgt.sgl, sg_cnt);
if (unlikely(err)) {
rnbd_clt_err_rl(dev, "RTRS failed to transfer IO, err: %d\n",
err);
@@ -1120,6 +1135,7 @@ static blk_status_t rnbd_queue_rq(struct blk_mq_hw_ctx *hctx,
struct rnbd_clt_dev *dev = rq->rq_disk->private_data;
struct rnbd_iu *iu = blk_mq_rq_to_pdu(rq);
int err;
+ blk_status_t ret = BLK_STS_IOERR;
if (unlikely(dev->dev_state != DEV_STATE_MAPPED))
return BLK_STS_IOERR;
@@ -1131,32 +1147,35 @@ static blk_status_t rnbd_queue_rq(struct blk_mq_hw_ctx *hctx,
return BLK_STS_RESOURCE;
}
+ iu->sgt.sgl = iu->first_sgl;
+ err = sg_alloc_table_chained(&iu->sgt,
+ /* Even-if the request has no segment,
+ * sglist must have one entry at least */
+ blk_rq_nr_phys_segments(rq) ? : 1,
+ iu->sgt.sgl,
+ RNBD_INLINE_SG_CNT);
+ if (err) {
+ rnbd_clt_err_rl(dev, "sg_alloc_table_chained ret=%d\n", err);
+ rnbd_clt_dev_kick_mq_queue(dev, hctx, 10/*ms*/);
+ rnbd_put_permit(dev->sess, iu->permit);
+ return BLK_STS_RESOURCE;
+ }
+
blk_mq_start_request(rq);
err = rnbd_client_xfer_request(dev, rq, iu);
if (likely(err == 0))
return BLK_STS_OK;
if (unlikely(err == -EAGAIN || err == -ENOMEM)) {
rnbd_clt_dev_kick_mq_queue(dev, hctx, 10/*ms*/);
- rnbd_put_permit(dev->sess, iu->permit);
- return BLK_STS_RESOURCE;
+ ret = BLK_STS_RESOURCE;
}
-
+ sg_free_table_chained(&iu->sgt, RNBD_INLINE_SG_CNT);
rnbd_put_permit(dev->sess, iu->permit);
- return BLK_STS_IOERR;
-}
-
-static int rnbd_init_request(struct blk_mq_tag_set *set, struct request *rq,
- unsigned int hctx_idx, unsigned int numa_node)
-{
- struct rnbd_iu *iu = blk_mq_rq_to_pdu(rq);
-
- sg_init_table(iu->sglist, BMAX_SEGMENTS);
- return 0;
+ return ret;
}
static struct blk_mq_ops rnbd_mq_ops = {
.queue_rq = rnbd_queue_rq,
- .init_request = rnbd_init_request,
.complete = rnbd_softirq_done_fn,
};
@@ -1170,7 +1189,7 @@ static int setup_mq_tags(struct rnbd_clt_session *sess)
tag_set->numa_node = NUMA_NO_NODE;
tag_set->flags = BLK_MQ_F_SHOULD_MERGE |
BLK_MQ_F_TAG_QUEUE_SHARED;
- tag_set->cmd_size = sizeof(struct rnbd_iu);
+ tag_set->cmd_size = sizeof(struct rnbd_iu) + RNBD_RDMA_SGL_SIZE;
tag_set->nr_hw_queues = num_online_cpus();
return blk_mq_alloc_tag_set(tag_set);
@@ -1208,7 +1227,7 @@ find_and_get_or_create_sess(const char *sessname,
*/
sess->rtrs = rtrs_clt_open(&rtrs_ops, sessname,
paths, path_cnt, port_nr,
- sizeof(struct rnbd_iu),
+ 0, /* Do not use pdu of rtrs */
RECONNECT_DELAY, BMAX_SEGMENTS,
BLK_MAX_SEGMENT_SIZE,
MAX_RECONNECTS);
@@ -1305,7 +1324,7 @@ static void setup_request_queue(struct rnbd_clt_dev *dev)
blk_queue_max_segments(dev->queue, dev->max_segments);
blk_queue_io_opt(dev->queue, dev->sess->max_io_size);
blk_queue_virt_boundary(dev->queue, SZ_4K - 1);
- blk_queue_write_cache(dev->queue, true, true);
+ blk_queue_write_cache(dev->queue, dev->wc, dev->fua);
dev->queue->queuedata = dev;
}
@@ -1388,12 +1407,11 @@ static struct rnbd_clt_dev *init_dev(struct rnbd_clt_session *sess,
goto out_queues;
}
- dev->pathname = kzalloc(strlen(pathname) + 1, GFP_KERNEL);
+ dev->pathname = kstrdup(pathname, GFP_KERNEL);
if (!dev->pathname) {
ret = -ENOMEM;
goto out_queues;
}
- strlcpy(dev->pathname, pathname, strlen(pathname) + 1);
dev->clt_device_id = ret;
dev->sess = sess;
@@ -1529,13 +1547,13 @@ struct rnbd_clt_dev *rnbd_clt_map_device(const char *sessname,
}
rnbd_clt_info(dev,
- "map_device: Device mapped as %s (nsectors: %zu, logical_block_size: %d, physical_block_size: %d, max_write_same_sectors: %d, max_discard_sectors: %d, discard_granularity: %d, discard_alignment: %d, secure_discard: %d, max_segments: %d, max_hw_sectors: %d, rotational: %d)\n",
+ "map_device: Device mapped as %s (nsectors: %zu, logical_block_size: %d, physical_block_size: %d, max_write_same_sectors: %d, max_discard_sectors: %d, discard_granularity: %d, discard_alignment: %d, secure_discard: %d, max_segments: %d, max_hw_sectors: %d, rotational: %d, wc: %d, fua: %d)\n",
dev->gd->disk_name, dev->nsectors,
dev->logical_block_size, dev->physical_block_size,
dev->max_write_same_sectors, dev->max_discard_sectors,
dev->discard_granularity, dev->discard_alignment,
dev->secure_discard, dev->max_segments,
- dev->max_hw_sectors, dev->rotational);
+ dev->max_hw_sectors, dev->rotational, dev->wc, dev->fua);
mutex_unlock(&dev->lock);
@@ -1667,7 +1685,7 @@ static void rnbd_destroy_sessions(void)
/*
* Here at this point there is no any concurrent access to sessions
* list and devices list:
- * 1. New session or device can'be be created - session sysfs files
+ * 1. New session or device can't be created - session sysfs files
* are removed.
* 2. Device or session can't be removed - module reference is taken
* into account in unmap device sysfs callback.
diff --git a/drivers/block/rnbd/rnbd-clt.h b/drivers/block/rnbd/rnbd-clt.h
index b193d5904050..537d499dad3b 100644
--- a/drivers/block/rnbd/rnbd-clt.h
+++ b/drivers/block/rnbd/rnbd-clt.h
@@ -44,6 +44,13 @@ struct rnbd_iu_comp {
int errno;
};
+#ifdef CONFIG_ARCH_NO_SG_CHAIN
+#define RNBD_INLINE_SG_CNT 0
+#else
+#define RNBD_INLINE_SG_CNT 2
+#endif
+#define RNBD_RDMA_SGL_SIZE (sizeof(struct scatterlist) * RNBD_INLINE_SG_CNT)
+
struct rnbd_iu {
union {
struct request *rq; /* for block io */
@@ -56,11 +63,12 @@ struct rnbd_iu {
/* use to send msg associated with a sess */
struct rnbd_clt_session *sess;
};
- struct scatterlist sglist[BMAX_SEGMENTS];
+ struct sg_table sgt;
struct work_struct work;
int errno;
struct rnbd_iu_comp comp;
atomic_t refcount;
+ struct scatterlist first_sgl[]; /* must be the last one */
};
struct rnbd_cpu_qlist {
@@ -112,6 +120,8 @@ struct rnbd_clt_dev {
enum rnbd_access_mode access_mode;
bool read_only;
bool rotational;
+ bool wc;
+ bool fua;
u32 max_hw_sectors;
u32 max_write_same_sectors;
u32 max_discard_sectors;
diff --git a/drivers/block/rnbd/rnbd-proto.h b/drivers/block/rnbd/rnbd-proto.h
index ca166241452c..c1bc5c0fef71 100644
--- a/drivers/block/rnbd/rnbd-proto.h
+++ b/drivers/block/rnbd/rnbd-proto.h
@@ -108,6 +108,11 @@ struct rnbd_msg_close {
__le32 device_id;
};
+enum rnbd_cache_policy {
+ RNBD_FUA = 1 << 0,
+ RNBD_WRITEBACK = 1 << 1,
+};
+
/**
* struct rnbd_msg_open_rsp - response message to RNBD_MSG_OPEN
* @hdr: message header
@@ -124,6 +129,7 @@ struct rnbd_msg_close {
* @max_segments: max segments hardware support in one transfer
* @secure_discard: supports secure discard
* @rotation: is a rotational disc?
+ * @cache_policy: support write-back caching or FUA?
*/
struct rnbd_msg_open_rsp {
struct rnbd_msg_hdr hdr;
@@ -139,7 +145,8 @@ struct rnbd_msg_open_rsp {
__le16 max_segments;
__le16 secure_discard;
u8 rotational;
- u8 reserved[11];
+ u8 cache_policy;
+ u8 reserved[10];
};
/**
diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index d1ee72ed8384..b8e44331e494 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -338,9 +338,10 @@ static int rnbd_srv_link_ev(struct rtrs_srv *rtrs,
void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev)
{
+ mutex_lock(&sess_dev->sess->lock);
rnbd_srv_destroy_dev_session_sysfs(sess_dev);
+ mutex_unlock(&sess_dev->sess->lock);
sess_dev->keep_id = true;
-
}
static int process_msg_close(struct rtrs_srv *rtrs,
@@ -549,6 +550,7 @@ static void rnbd_srv_fill_msg_open_rsp(struct rnbd_msg_open_rsp *rsp,
struct rnbd_srv_sess_dev *sess_dev)
{
struct rnbd_dev *rnbd_dev = sess_dev->rnbd_dev;
+ struct request_queue *q = bdev_get_queue(rnbd_dev->bdev);
rsp->hdr.type = cpu_to_le16(RNBD_MSG_OPEN_RSP);
rsp->device_id =
@@ -573,8 +575,12 @@ static void rnbd_srv_fill_msg_open_rsp(struct rnbd_msg_open_rsp *rsp,
cpu_to_le32(rnbd_dev_get_discard_alignment(rnbd_dev));
rsp->secure_discard =
cpu_to_le16(rnbd_dev_get_secure_discard(rnbd_dev));
- rsp->rotational =
- !blk_queue_nonrot(bdev_get_queue(rnbd_dev->bdev));
+ rsp->rotational = !blk_queue_nonrot(q);
+ rsp->cache_policy = 0;
+ if (test_bit(QUEUE_FLAG_WC, &q->queue_flags))
+ rsp->cache_policy |= RNBD_WRITEBACK;
+ if (blk_queue_fua(q))
+ rsp->cache_policy |= RNBD_FUA;
}
static struct rnbd_srv_sess_dev *
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-14 11:56:52 +0300