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-rw-r--r--block/bio.c11
-rw-r--r--block/blk-cgroup.c15
-rw-r--r--block/blk-flush.c1
-rw-r--r--drivers/block/nbd.c9
-rw-r--r--drivers/block/null_blk.h2
-rw-r--r--drivers/block/null_blk_zoned.c123
-rw-r--r--drivers/block/xsysace.c49
-rw-r--r--drivers/nvme/host/core.c2
-rw-r--r--drivers/nvme/host/fc.c270
-rw-r--r--drivers/nvme/host/rdma.c8
-rw-r--r--drivers/nvme/target/core.c4
-rw-r--r--drivers/nvme/target/trace.h21
-rw-r--r--lib/scatterlist.c2
13 files changed, 281 insertions, 236 deletions
diff --git a/block/bio.c b/block/bio.c
index e6e26d7a1ffb..fa01bef35bb1 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1044,6 +1044,7 @@ static int __bio_iov_append_get_pages(struct bio *bio, struct iov_iter *iter)
ssize_t size, left;
unsigned len, i;
size_t offset;
+ int ret = 0;
if (WARN_ON_ONCE(!max_append_sectors))
return 0;
@@ -1066,15 +1067,17 @@ static int __bio_iov_append_get_pages(struct bio *bio, struct iov_iter *iter)
len = min_t(size_t, PAGE_SIZE - offset, left);
if (bio_add_hw_page(q, bio, page, len, offset,
- max_append_sectors, &same_page) != len)
- return -EINVAL;
+ max_append_sectors, &same_page) != len) {
+ ret = -EINVAL;
+ break;
+ }
if (same_page)
put_page(page);
offset = 0;
}
- iov_iter_advance(iter, size);
- return 0;
+ iov_iter_advance(iter, size - left);
+ return ret;
}
/**
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index f9b55614d67d..c68bdf58c9a6 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -657,13 +657,20 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
goto fail;
}
+ if (radix_tree_preload(GFP_KERNEL)) {
+ blkg_free(new_blkg);
+ ret = -ENOMEM;
+ goto fail;
+ }
+
rcu_read_lock();
spin_lock_irq(&q->queue_lock);
blkg = blkg_lookup_check(pos, pol, q);
if (IS_ERR(blkg)) {
ret = PTR_ERR(blkg);
- goto fail_unlock;
+ blkg_free(new_blkg);
+ goto fail_preloaded;
}
if (blkg) {
@@ -672,10 +679,12 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
blkg = blkg_create(pos, q, new_blkg);
if (IS_ERR(blkg)) {
ret = PTR_ERR(blkg);
- goto fail_unlock;
+ goto fail_preloaded;
}
}
+ radix_tree_preload_end();
+
if (pos == blkcg)
goto success;
}
@@ -685,6 +694,8 @@ success:
ctx->body = input;
return 0;
+fail_preloaded:
+ radix_tree_preload_end();
fail_unlock:
spin_unlock_irq(&q->queue_lock);
rcu_read_unlock();
diff --git a/block/blk-flush.c b/block/blk-flush.c
index 53abb5c73d99..e32958f0b687 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -225,6 +225,7 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error)
/* release the tag's ownership to the req cloned from */
spin_lock_irqsave(&fq->mq_flush_lock, flags);
+ WRITE_ONCE(flush_rq->state, MQ_RQ_IDLE);
if (!refcount_dec_and_test(&flush_rq->ref)) {
fq->rq_status = error;
spin_unlock_irqrestore(&fq->mq_flush_lock, flags);
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 0bed21c0c81b..c4f9ccf5cc2a 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -296,7 +296,7 @@ static void nbd_size_clear(struct nbd_device *nbd)
}
}
-static void nbd_size_update(struct nbd_device *nbd)
+static void nbd_size_update(struct nbd_device *nbd, bool start)
{
struct nbd_config *config = nbd->config;
struct block_device *bdev = bdget_disk(nbd->disk, 0);
@@ -313,7 +313,8 @@ static void nbd_size_update(struct nbd_device *nbd)
if (bdev) {
if (bdev->bd_disk) {
bd_set_nr_sectors(bdev, nr_sectors);
- set_blocksize(bdev, config->blksize);
+ if (start)
+ set_blocksize(bdev, config->blksize);
} else
set_bit(GD_NEED_PART_SCAN, &nbd->disk->state);
bdput(bdev);
@@ -328,7 +329,7 @@ static void nbd_size_set(struct nbd_device *nbd, loff_t blocksize,
config->blksize = blocksize;
config->bytesize = blocksize * nr_blocks;
if (nbd->task_recv != NULL)
- nbd_size_update(nbd);
+ nbd_size_update(nbd, false);
}
static void nbd_complete_rq(struct request *req)
@@ -1308,7 +1309,7 @@ static int nbd_start_device(struct nbd_device *nbd)
args->index = i;
queue_work(nbd->recv_workq, &args->work);
}
- nbd_size_update(nbd);
+ nbd_size_update(nbd, true);
return error;
}
diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h
index d2e7db43a52a..cfd00ad40355 100644
--- a/drivers/block/null_blk.h
+++ b/drivers/block/null_blk.h
@@ -47,6 +47,8 @@ struct nullb_device {
unsigned int nr_zones_closed;
struct blk_zone *zones;
sector_t zone_size_sects;
+ spinlock_t zone_dev_lock;
+ unsigned long *zone_locks;
unsigned long size; /* device size in MB */
unsigned long completion_nsec; /* time in ns to complete a request */
diff --git a/drivers/block/null_blk_zoned.c b/drivers/block/null_blk_zoned.c
index 7d94f2d47a6a..8775acbb4f8f 100644
--- a/drivers/block/null_blk_zoned.c
+++ b/drivers/block/null_blk_zoned.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/vmalloc.h>
+#include <linux/bitmap.h>
#include "null_blk.h"
#define CREATE_TRACE_POINTS
@@ -45,6 +46,13 @@ int null_init_zoned_dev(struct nullb_device *dev, struct request_queue *q)
if (!dev->zones)
return -ENOMEM;
+ spin_lock_init(&dev->zone_dev_lock);
+ dev->zone_locks = bitmap_zalloc(dev->nr_zones, GFP_KERNEL);
+ if (!dev->zone_locks) {
+ kvfree(dev->zones);
+ return -ENOMEM;
+ }
+
if (dev->zone_nr_conv >= dev->nr_zones) {
dev->zone_nr_conv = dev->nr_zones - 1;
pr_info("changed the number of conventional zones to %u",
@@ -123,15 +131,26 @@ int null_register_zoned_dev(struct nullb *nullb)
void null_free_zoned_dev(struct nullb_device *dev)
{
+ bitmap_free(dev->zone_locks);
kvfree(dev->zones);
}
+static inline void null_lock_zone(struct nullb_device *dev, unsigned int zno)
+{
+ wait_on_bit_lock_io(dev->zone_locks, zno, TASK_UNINTERRUPTIBLE);
+}
+
+static inline void null_unlock_zone(struct nullb_device *dev, unsigned int zno)
+{
+ clear_and_wake_up_bit(zno, dev->zone_locks);
+}
+
int null_report_zones(struct gendisk *disk, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data)
{
struct nullb *nullb = disk->private_data;
struct nullb_device *dev = nullb->dev;
- unsigned int first_zone, i;
+ unsigned int first_zone, i, zno;
struct blk_zone zone;
int error;
@@ -142,15 +161,18 @@ int null_report_zones(struct gendisk *disk, sector_t sector,
nr_zones = min(nr_zones, dev->nr_zones - first_zone);
trace_nullb_report_zones(nullb, nr_zones);
- for (i = 0; i < nr_zones; i++) {
+ zno = first_zone;
+ for (i = 0; i < nr_zones; i++, zno++) {
/*
* Stacked DM target drivers will remap the zone information by
* modifying the zone information passed to the report callback.
* So use a local copy to avoid corruption of the device zone
* array.
*/
- memcpy(&zone, &dev->zones[first_zone + i],
- sizeof(struct blk_zone));
+ null_lock_zone(dev, zno);
+ memcpy(&zone, &dev->zones[zno], sizeof(struct blk_zone));
+ null_unlock_zone(dev, zno);
+
error = cb(&zone, i, data);
if (error)
return error;
@@ -159,6 +181,10 @@ int null_report_zones(struct gendisk *disk, sector_t sector,
return nr_zones;
}
+/*
+ * This is called in the case of memory backing from null_process_cmd()
+ * with the target zone already locked.
+ */
size_t null_zone_valid_read_len(struct nullb *nullb,
sector_t sector, unsigned int len)
{
@@ -295,22 +321,27 @@ static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
return null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
+ null_lock_zone(dev, zno);
+ spin_lock(&dev->zone_dev_lock);
+
switch (zone->cond) {
case BLK_ZONE_COND_FULL:
/* Cannot write to a full zone */
- return BLK_STS_IOERR;
+ ret = BLK_STS_IOERR;
+ goto unlock;
case BLK_ZONE_COND_EMPTY:
case BLK_ZONE_COND_CLOSED:
ret = null_check_zone_resources(dev, zone);
if (ret != BLK_STS_OK)
- return ret;
+ goto unlock;
break;
case BLK_ZONE_COND_IMP_OPEN:
case BLK_ZONE_COND_EXP_OPEN:
break;
default:
/* Invalid zone condition */
- return BLK_STS_IOERR;
+ ret = BLK_STS_IOERR;
+ goto unlock;
}
/*
@@ -326,11 +357,14 @@ static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
else
cmd->rq->__sector = sector;
} else if (sector != zone->wp) {
- return BLK_STS_IOERR;
+ ret = BLK_STS_IOERR;
+ goto unlock;
}
- if (zone->wp + nr_sectors > zone->start + zone->capacity)
- return BLK_STS_IOERR;
+ if (zone->wp + nr_sectors > zone->start + zone->capacity) {
+ ret = BLK_STS_IOERR;
+ goto unlock;
+ }
if (zone->cond == BLK_ZONE_COND_CLOSED) {
dev->nr_zones_closed--;
@@ -341,9 +375,11 @@ static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
if (zone->cond != BLK_ZONE_COND_EXP_OPEN)
zone->cond = BLK_ZONE_COND_IMP_OPEN;
+ spin_unlock(&dev->zone_dev_lock);
ret = null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
+ spin_lock(&dev->zone_dev_lock);
if (ret != BLK_STS_OK)
- return ret;
+ goto unlock;
zone->wp += nr_sectors;
if (zone->wp == zone->start + zone->capacity) {
@@ -353,7 +389,13 @@ static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
dev->nr_zones_imp_open--;
zone->cond = BLK_ZONE_COND_FULL;
}
- return BLK_STS_OK;
+ ret = BLK_STS_OK;
+
+unlock:
+ spin_unlock(&dev->zone_dev_lock);
+ null_unlock_zone(dev, zno);
+
+ return ret;
}
static blk_status_t null_open_zone(struct nullb_device *dev, struct blk_zone *zone)
@@ -464,16 +506,33 @@ static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_opf op,
sector_t sector)
{
struct nullb_device *dev = cmd->nq->dev;
- unsigned int zone_no = null_zone_no(dev, sector);
- struct blk_zone *zone = &dev->zones[zone_no];
- blk_status_t ret = BLK_STS_OK;
+ unsigned int zone_no;
+ struct blk_zone *zone;
+ blk_status_t ret;
size_t i;
+ if (op == REQ_OP_ZONE_RESET_ALL) {
+ for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
+ null_lock_zone(dev, i);
+ zone = &dev->zones[i];
+ if (zone->cond != BLK_ZONE_COND_EMPTY) {
+ spin_lock(&dev->zone_dev_lock);
+ null_reset_zone(dev, zone);
+ spin_unlock(&dev->zone_dev_lock);
+ trace_nullb_zone_op(cmd, i, zone->cond);
+ }
+ null_unlock_zone(dev, i);
+ }
+ return BLK_STS_OK;
+ }
+
+ zone_no = null_zone_no(dev, sector);
+ zone = &dev->zones[zone_no];
+
+ null_lock_zone(dev, zone_no);
+ spin_lock(&dev->zone_dev_lock);
+
switch (op) {
- case REQ_OP_ZONE_RESET_ALL:
- for (i = dev->zone_nr_conv; i < dev->nr_zones; i++)
- null_reset_zone(dev, &dev->zones[i]);
- break;
case REQ_OP_ZONE_RESET:
ret = null_reset_zone(dev, zone);
break;
@@ -487,30 +546,46 @@ static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_opf op,
ret = null_finish_zone(dev, zone);
break;
default:
- return BLK_STS_NOTSUPP;
+ ret = BLK_STS_NOTSUPP;
+ break;
}
+ spin_unlock(&dev->zone_dev_lock);
+
if (ret == BLK_STS_OK)
trace_nullb_zone_op(cmd, zone_no, zone->cond);
+ null_unlock_zone(dev, zone_no);
+
return ret;
}
blk_status_t null_process_zoned_cmd(struct nullb_cmd *cmd, enum req_opf op,
sector_t sector, sector_t nr_sectors)
{
+ struct nullb_device *dev = cmd->nq->dev;
+ unsigned int zno = null_zone_no(dev, sector);
+ blk_status_t sts;
+
switch (op) {
case REQ_OP_WRITE:
- return null_zone_write(cmd, sector, nr_sectors, false);
+ sts = null_zone_write(cmd, sector, nr_sectors, false);
+ break;
case REQ_OP_ZONE_APPEND:
- return null_zone_write(cmd, sector, nr_sectors, true);
+ sts = null_zone_write(cmd, sector, nr_sectors, true);
+ break;
case REQ_OP_ZONE_RESET:
case REQ_OP_ZONE_RESET_ALL:
case REQ_OP_ZONE_OPEN:
case REQ_OP_ZONE_CLOSE:
case REQ_OP_ZONE_FINISH:
- return null_zone_mgmt(cmd, op, sector);
+ sts = null_zone_mgmt(cmd, op, sector);
+ break;
default:
- return null_process_cmd(cmd, op, sector, nr_sectors);
+ null_lock_zone(dev, zno);
+ sts = null_process_cmd(cmd, op, sector, nr_sectors);
+ null_unlock_zone(dev, zno);
}
+
+ return sts;
}
diff --git a/drivers/block/xsysace.c b/drivers/block/xsysace.c
index 8d581c7536fb..eb8ef65778c3 100644
--- a/drivers/block/xsysace.c
+++ b/drivers/block/xsysace.c
@@ -443,22 +443,27 @@ static void ace_fix_driveid(u16 *id)
#define ACE_FSM_NUM_STATES 11
/* Set flag to exit FSM loop and reschedule tasklet */
-static inline void ace_fsm_yield(struct ace_device *ace)
+static inline void ace_fsm_yieldpoll(struct ace_device *ace)
{
- dev_dbg(ace->dev, "ace_fsm_yield()\n");
tasklet_schedule(&ace->fsm_tasklet);
ace->fsm_continue_flag = 0;
}
+static inline void ace_fsm_yield(struct ace_device *ace)
+{
+ dev_dbg(ace->dev, "%s()\n", __func__);
+ ace_fsm_yieldpoll(ace);
+}
+
/* Set flag to exit FSM loop and wait for IRQ to reschedule tasklet */
static inline void ace_fsm_yieldirq(struct ace_device *ace)
{
dev_dbg(ace->dev, "ace_fsm_yieldirq()\n");
- if (!ace->irq)
- /* No IRQ assigned, so need to poll */
- tasklet_schedule(&ace->fsm_tasklet);
- ace->fsm_continue_flag = 0;
+ if (ace->irq > 0)
+ ace->fsm_continue_flag = 0;
+ else
+ ace_fsm_yieldpoll(ace);
}
static bool ace_has_next_request(struct request_queue *q)
@@ -1053,12 +1058,12 @@ static int ace_setup(struct ace_device *ace)
ACE_CTRL_DATABUFRDYIRQ | ACE_CTRL_ERRORIRQ);
/* Now we can hook up the irq handler */
- if (ace->irq) {
+ if (ace->irq > 0) {
rc = request_irq(ace->irq, ace_interrupt, 0, "systemace", ace);
if (rc) {
/* Failure - fall back to polled mode */
dev_err(ace->dev, "request_irq failed\n");
- ace->irq = 0;
+ ace->irq = rc;
}
}
@@ -1110,7 +1115,7 @@ static void ace_teardown(struct ace_device *ace)
tasklet_kill(&ace->fsm_tasklet);
- if (ace->irq)
+ if (ace->irq > 0)
free_irq(ace->irq, ace);
iounmap(ace->baseaddr);
@@ -1123,11 +1128,6 @@ static int ace_alloc(struct device *dev, int id, resource_size_t physaddr,
int rc;
dev_dbg(dev, "ace_alloc(%p)\n", dev);
- if (!physaddr) {
- rc = -ENODEV;
- goto err_noreg;
- }
-
/* Allocate and initialize the ace device structure */
ace = kzalloc(sizeof(struct ace_device), GFP_KERNEL);
if (!ace) {
@@ -1153,7 +1153,6 @@ err_setup:
dev_set_drvdata(dev, NULL);
kfree(ace);
err_alloc:
-err_noreg:
dev_err(dev, "could not initialize device, err=%i\n", rc);
return rc;
}
@@ -1176,10 +1175,11 @@ static void ace_free(struct device *dev)
static int ace_probe(struct platform_device *dev)
{
- resource_size_t physaddr = 0;
int bus_width = ACE_BUS_WIDTH_16; /* FIXME: should not be hard coded */
+ resource_size_t physaddr;
+ struct resource *res;
u32 id = dev->id;
- int irq = 0;
+ int irq;
int i;
dev_dbg(&dev->dev, "ace_probe(%p)\n", dev);
@@ -1190,12 +1190,15 @@ static int ace_probe(struct platform_device *dev)
if (of_find_property(dev->dev.of_node, "8-bit", NULL))
bus_width = ACE_BUS_WIDTH_8;
- for (i = 0; i < dev->num_resources; i++) {
- if (dev->resource[i].flags & IORESOURCE_MEM)
- physaddr = dev->resource[i].start;
- if (dev->resource[i].flags & IORESOURCE_IRQ)
- irq = dev->resource[i].start;
- }
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+
+ physaddr = res->start;
+ if (!physaddr)
+ return -ENODEV;
+
+ irq = platform_get_irq_optional(dev, 0);
/* Call the bus-independent setup code */
return ace_alloc(&dev->dev, id, physaddr, irq, bus_width);
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 95ef4943d8bd..376096bfc54a 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2125,7 +2125,7 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_id_ns *id)
if (blk_queue_is_zoned(ns->queue)) {
ret = nvme_revalidate_zones(ns);
- if (ret)
+ if (ret && !nvme_first_scan(ns->disk))
return ret;
}
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 3c002bdcace3..f4c246462658 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -146,7 +146,8 @@ struct nvme_fc_rport {
/* fc_ctrl flags values - specified as bit positions */
#define ASSOC_ACTIVE 0
-#define FCCTRL_TERMIO 1
+#define ASSOC_FAILED 1
+#define FCCTRL_TERMIO 2
struct nvme_fc_ctrl {
spinlock_t lock;
@@ -157,7 +158,6 @@ struct nvme_fc_ctrl {
u32 cnum;
bool ioq_live;
- atomic_t err_work_active;
u64 association_id;
struct nvmefc_ls_rcv_op *rcv_disconn;
@@ -167,7 +167,6 @@ struct nvme_fc_ctrl {
struct blk_mq_tag_set tag_set;
struct delayed_work connect_work;
- struct work_struct err_work;
struct kref ref;
unsigned long flags;
@@ -2414,24 +2413,97 @@ nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl)
nvme_fc_ctrl_put(ctrl);
}
+/*
+ * This routine is used by the transport when it needs to find active
+ * io on a queue that is to be terminated. The transport uses
+ * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke
+ * this routine to kill them on a 1 by 1 basis.
+ *
+ * As FC allocates FC exchange for each io, the transport must contact
+ * the LLDD to terminate the exchange, thus releasing the FC exchange.
+ * After terminating the exchange the LLDD will call the transport's
+ * normal io done path for the request, but it will have an aborted
+ * status. The done path will return the io request back to the block
+ * layer with an error status.
+ */
+static bool
+nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved)
+{
+ struct nvme_ctrl *nctrl = data;
+ struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
+ struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req);
+
+ __nvme_fc_abort_op(ctrl, op);
+ return true;
+}
+
+/*
+ * This routine runs through all outstanding commands on the association
+ * and aborts them. This routine is typically be called by the
+ * delete_association routine. It is also called due to an error during
+ * reconnect. In that scenario, it is most likely a command that initializes
+ * the controller, including fabric Connect commands on io queues, that
+ * may have timed out or failed thus the io must be killed for the connect
+ * thread to see the error.
+ */
static void
-nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg)
+__nvme_fc_abort_outstanding_ios(struct nvme_fc_ctrl *ctrl, bool start_queues)
{
- int active;
+ /*
+ * If io queues are present, stop them and terminate all outstanding
+ * ios on them. As FC allocates FC exchange for each io, the
+ * transport must contact the LLDD to terminate the exchange,
+ * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr()
+ * to tell us what io's are busy and invoke a transport routine
+ * to kill them with the LLDD. After terminating the exchange
+ * the LLDD will call the transport's normal io done path, but it
+ * will have an aborted status. The done path will return the
+ * io requests back to the block layer as part of normal completions
+ * (but with error status).
+ */
+ if (ctrl->ctrl.queue_count > 1) {
+ nvme_stop_queues(&ctrl->ctrl);
+ blk_mq_tagset_busy_iter(&ctrl->tag_set,
+ nvme_fc_terminate_exchange, &ctrl->ctrl);
+ blk_mq_tagset_wait_completed_request(&ctrl->tag_set);
+ if (start_queues)
+ nvme_start_queues(&ctrl->ctrl);
+ }
+
+ /*
+ * Other transports, which don't have link-level contexts bound
+ * to sqe's, would try to gracefully shutdown the controller by
+ * writing the registers for shutdown and polling (call
+ * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially
+ * just aborted and we will wait on those contexts, and given
+ * there was no indication of how live the controlelr is on the
+ * link, don't send more io to create more contexts for the
+ * shutdown. Let the controller fail via keepalive failure if
+ * its still present.
+ */
/*
- * if an error (io timeout, etc) while (re)connecting,
- * it's an error on creating the new association.
- * Start the error recovery thread if it hasn't already
- * been started. It is expected there could be multiple
- * ios hitting this path before things are cleaned up.
+ * clean up the admin queue. Same thing as above.
+ */
+ blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
+ blk_mq_tagset_busy_iter(&ctrl->admin_tag_set,
+ nvme_fc_terminate_exchange, &ctrl->ctrl);
+ blk_mq_tagset_wait_completed_request(&ctrl->admin_tag_set);
+}
+
+static void
+nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg)
+{
+ /*
+ * if an error (io timeout, etc) while (re)connecting, the remote
+ * port requested terminating of the association (disconnect_ls)
+ * or an error (timeout or abort) occurred on an io while creating
+ * the controller. Abort any ios on the association and let the
+ * create_association error path resolve things.
*/
if (ctrl->ctrl.state == NVME_CTRL_CONNECTING) {
- active = atomic_xchg(&ctrl->err_work_active, 1);
- if (!active && !queue_work(nvme_fc_wq, &ctrl->err_work)) {
- atomic_set(&ctrl->err_work_active, 0);
- WARN_ON(1);
- }
+ __nvme_fc_abort_outstanding_ios(ctrl, true);
+ set_bit(ASSOC_FAILED, &ctrl->flags);
return;
}
@@ -2745,30 +2817,6 @@ nvme_fc_complete_rq(struct request *rq)
nvme_fc_ctrl_put(ctrl);
}
-/*
- * This routine is used by the transport when it needs to find active
- * io on a queue that is to be terminated. The transport uses
- * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke
- * this routine to kill them on a 1 by 1 basis.
- *
- * As FC allocates FC exchange for each io, the transport must contact
- * the LLDD to terminate the exchange, thus releasing the FC exchange.
- * After terminating the exchange the LLDD will call the transport's
- * normal io done path for the request, but it will have an aborted
- * status. The done path will return the io request back to the block
- * layer with an error status.
- */
-static bool
-nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved)
-{
- struct nvme_ctrl *nctrl = data;
- struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
- struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req);
-
- __nvme_fc_abort_op(ctrl, op);
- return true;
-}
-
static const struct blk_mq_ops nvme_fc_mq_ops = {
.queue_rq = nvme_fc_queue_rq,
@@ -2988,6 +3036,8 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
ctrl->cnum, ctrl->lport->localport.port_name,
ctrl->rport->remoteport.port_name, ctrl->ctrl.opts->subsysnqn);
+ clear_bit(ASSOC_FAILED, &ctrl->flags);
+
/*
* Create the admin queue
*/
@@ -3016,7 +3066,7 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
*/
ret = nvme_enable_ctrl(&ctrl->ctrl);
- if (ret)
+ if (ret || test_bit(ASSOC_FAILED, &ctrl->flags))
goto out_disconnect_admin_queue;
ctrl->ctrl.max_segments = ctrl->lport->ops->max_sgl_segments;
@@ -3026,7 +3076,7 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
ret = nvme_init_identify(&ctrl->ctrl);
- if (ret)
+ if (ret || test_bit(ASSOC_FAILED, &ctrl->flags))
goto out_disconnect_admin_queue;
/* sanity checks */
@@ -3071,9 +3121,9 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
ret = nvme_fc_create_io_queues(ctrl);
else
ret = nvme_fc_recreate_io_queues(ctrl);
- if (ret)
- goto out_term_aen_ops;
}
+ if (ret || test_bit(ASSOC_FAILED, &ctrl->flags))
+ goto out_term_aen_ops;
changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE);
@@ -3108,60 +3158,6 @@ out_free_queue:
/*
- * This routine runs through all outstanding commands on the association
- * and aborts them. This routine is typically be called by the
- * delete_association routine. It is also called due to an error during
- * reconnect. In that scenario, it is most likely a command that initializes
- * the controller, including fabric Connect commands on io queues, that
- * may have timed out or failed thus the io must be killed for the connect
- * thread to see the error.
- */
-static void
-__nvme_fc_abort_outstanding_ios(struct nvme_fc_ctrl *ctrl, bool start_queues)
-{
- /*
- * If io queues are present, stop them and terminate all outstanding
- * ios on them. As FC allocates FC exchange for each io, the
- * transport must contact the LLDD to terminate the exchange,
- * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr()
- * to tell us what io's are busy and invoke a transport routine
- * to kill them with the LLDD. After terminating the exchange
- * the LLDD will call the transport's normal io done path, but it
- * will have an aborted status. The done path will return the
- * io requests back to the block layer as part of normal completions
- * (but with error status).
- */
- if (ctrl->ctrl.queue_count > 1) {
- nvme_stop_queues(&ctrl->ctrl);
- blk_mq_tagset_busy_iter(&ctrl->tag_set,
- nvme_fc_terminate_exchange, &ctrl->ctrl);
- blk_mq_tagset_wait_completed_request(&ctrl->tag_set);
- if (start_queues)
- nvme_start_queues(&ctrl->ctrl);
- }
-
- /*
- * Other transports, which don't have link-level contexts bound
- * to sqe's, would try to gracefully shutdown the controller by
- * writing the registers for shutdown and polling (call
- * nvme_shutdown_ctrl()). Given a bunch of i/o was potentially
- * just aborted and we will wait on those contexts, and given
- * there was no indication of how live the controlelr is on the
- * link, don't send more io to create more contexts for the
- * shutdown. Let the controller fail via keepalive failure if
- * its still present.
- */
-
- /*
- * clean up the admin queue. Same thing as above.
- */
- blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
- blk_mq_tagset_busy_iter(&ctrl->admin_tag_set,
- nvme_fc_terminate_exchange, &ctrl->ctrl);
- blk_mq_tagset_wait_completed_request(&ctrl->admin_tag_set);
-}
-
-/*
* This routine stops operation of the controller on the host side.
* On the host os stack side: Admin and IO queues are stopped,
* outstanding ios on them terminated via FC ABTS.
@@ -3237,7 +3233,6 @@ nvme_fc_delete_ctrl(struct nvme_ctrl *nctrl)
{
struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
- cancel_work_sync(&ctrl->err_work);
cancel_delayed_work_sync(&ctrl->connect_work);
/*
* kill the association on the link side. this will block
@@ -3292,78 +3287,34 @@ nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status)
}
static void
-__nvme_fc_terminate_io(struct nvme_fc_ctrl *ctrl)
+nvme_fc_reset_ctrl_work(struct work_struct *work)
{
- /*
- * if state is CONNECTING - the error occurred as part of a
- * reconnect attempt. Abort any ios on the association and
- * let the create_association error paths resolve things.
- */
- if (ctrl->ctrl.state == NVME_CTRL_CONNECTING) {
- __nvme_fc_abort_outstanding_ios(ctrl, true);
- return;
- }
-
- /*
- * For any other state, kill the association. As this routine
- * is a common io abort routine for resetting and such, after
- * the association is terminated, ensure that the state is set
- * to CONNECTING.
- */
+ struct nvme_fc_ctrl *ctrl =
+ container_of(work, struct nvme_fc_ctrl, ctrl.reset_work);
- nvme_stop_keep_alive(&ctrl->ctrl);
+ nvme_stop_ctrl(&ctrl->ctrl);
/* will block will waiting for io to terminate */
nvme_fc_delete_association(ctrl);
- if (ctrl->ctrl.state != NVME_CTRL_CONNECTING &&
- !nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING))
+ if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING))
dev_err(ctrl->ctrl.device,
"NVME-FC{%d}: error_recovery: Couldn't change state "
"to CONNECTING\n", ctrl->cnum);
-}
-
-static void
-nvme_fc_reset_ctrl_work(struct work_struct *work)
-{
- struct nvme_fc_ctrl *ctrl =
- container_of(work, struct nvme_fc_ctrl, ctrl.reset_work);
- int ret;
- __nvme_fc_terminate_io(ctrl);
-
- nvme_stop_ctrl(&ctrl->ctrl);
-
- if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE)
- ret = nvme_fc_create_association(ctrl);
- else
- ret = -ENOTCONN;
-
- if (ret)
- nvme_fc_reconnect_or_delete(ctrl, ret);
- else
- dev_info(ctrl->ctrl.device,
- "NVME-FC{%d}: controller reset complete\n",
- ctrl->cnum);
+ if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE) {
+ if (!queue_delayed_work(nvme_wq, &ctrl->connect_work, 0)) {
+ dev_err(ctrl->ctrl.device,
+ "NVME-FC{%d}: failed to schedule connect "
+ "after reset\n", ctrl->cnum);
+ } else {
+ flush_delayed_work(&ctrl->connect_work);
+ }
+ } else {
+ nvme_fc_reconnect_or_delete(ctrl, -ENOTCONN);
+ }
}
-static void
-nvme_fc_connect_err_work(struct work_struct *work)
-{
- struct nvme_fc_ctrl *ctrl =
- container_of(work, struct nvme_fc_ctrl, err_work);
-
- __nvme_fc_terminate_io(ctrl);
-
- atomic_set(&ctrl->err_work_active, 0);
-
- /*
- * Rescheduling the connection after recovering
- * from the io error is left to the reconnect work
- * item, which is what should have stalled waiting on
- * the io that had the error that scheduled this work.
- */
-}
static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = {
.name = "fc",
@@ -3491,7 +3442,6 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
ctrl->dev = lport->dev;
ctrl->cnum = idx;
ctrl->ioq_live = false;
- atomic_set(&ctrl->err_work_active, 0);
init_waitqueue_head(&ctrl->ioabort_wait);
get_device(ctrl->dev);
@@ -3499,7 +3449,6 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work);
INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work);
- INIT_WORK(&ctrl->err_work, nvme_fc_connect_err_work);
spin_lock_init(&ctrl->lock);
/* io queue count */
@@ -3592,7 +3541,6 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
fail_ctrl:
nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING);
cancel_work_sync(&ctrl->ctrl.reset_work);
- cancel_work_sync(&ctrl->err_work);
cancel_delayed_work_sync(&ctrl->connect_work);
ctrl->ctrl.opts = NULL;
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 8bbc48cc45dc..541b0cba6d80 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1768,6 +1768,14 @@ static void nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc)
return;
}
+ /* sanity checking for received data length */
+ if (unlikely(wc->byte_len < len)) {
+ dev_err(queue->ctrl->ctrl.device,
+ "Unexpected nvme completion length(%d)\n", wc->byte_len);
+ nvme_rdma_error_recovery(queue->ctrl);
+ return;
+ }
+
ib_dma_sync_single_for_cpu(ibdev, qe->dma, len, DMA_FROM_DEVICE);
/*
* AEN requests are special as they don't time out and can
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index aafcbc424b7a..957b39a82431 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -907,8 +907,6 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq,
req->error_loc = NVMET_NO_ERROR_LOC;
req->error_slba = 0;
- trace_nvmet_req_init(req, req->cmd);
-
/* no support for fused commands yet */
if (unlikely(flags & (NVME_CMD_FUSE_FIRST | NVME_CMD_FUSE_SECOND))) {
req->error_loc = offsetof(struct nvme_common_command, flags);
@@ -938,6 +936,8 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq,
if (status)
goto fail;
+ trace_nvmet_req_init(req, req->cmd);
+
if (unlikely(!percpu_ref_tryget_live(&sq->ref))) {
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
goto fail;
diff --git a/drivers/nvme/target/trace.h b/drivers/nvme/target/trace.h
index 0458046d6501..c14e3249a14d 100644
--- a/drivers/nvme/target/trace.h
+++ b/drivers/nvme/target/trace.h
@@ -46,19 +46,12 @@ static inline struct nvmet_ctrl *nvmet_req_to_ctrl(struct nvmet_req *req)
return req->sq->ctrl;
}
-static inline void __assign_disk_name(char *name, struct nvmet_req *req,
- bool init)
+static inline void __assign_req_name(char *name, struct nvmet_req *req)
{
- struct nvmet_ctrl *ctrl = nvmet_req_to_ctrl(req);
- struct nvmet_ns *ns;
-
- if ((init && req->sq->qid) || (!init && req->cq->qid)) {
- ns = nvmet_find_namespace(ctrl, req->cmd->rw.nsid);
- strncpy(name, ns->device_path, DISK_NAME_LEN);
- return;
- }
-
- memset(name, 0, DISK_NAME_LEN);
+ if (req->ns)
+ strncpy(name, req->ns->device_path, DISK_NAME_LEN);
+ else
+ memset(name, 0, DISK_NAME_LEN);
}
#endif
@@ -81,7 +74,7 @@ TRACE_EVENT(nvmet_req_init,
TP_fast_assign(
__entry->cmd = cmd;
__entry->ctrl = nvmet_req_to_ctrl(req);
- __assign_disk_name(__entry->disk, req, true);
+ __assign_req_name(__entry->disk, req);
__entry->qid = req->sq->qid;
__entry->cid = cmd->common.command_id;
__entry->opcode = cmd->common.opcode;
@@ -121,7 +114,7 @@ TRACE_EVENT(nvmet_req_complete,
__entry->cid = req->cqe->command_id;
__entry->result = le64_to_cpu(req->cqe->result.u64);
__entry->status = le16_to_cpu(req->cqe->status) >> 1;
- __assign_disk_name(__entry->disk, req, false);
+ __assign_req_name(__entry->disk, req);
),
TP_printk("nvmet%s: %sqid=%d, cmdid=%u, res=%#llx, status=%#x",
__print_ctrl_name(__entry->ctrl),
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 0a482ef988e5..a59778946404 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -933,7 +933,7 @@ size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, void *buf,
sg_miter_start(&miter, sgl, nents, sg_flags);
if (!sg_miter_skip(&miter, skip))
- return false;
+ return 0;
while ((offset < buflen) && sg_miter_next(&miter)) {
unsigned int len;