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NVMe: Cancel outstanding IOs on queue deletion 

If the device is hot-unplugged while there are active commands, we should
time out the I/Os so that upper layers don't just see the I/Os disappear.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
hifive-unleashed-5.1
Matthew Wilcox 2012-08-07 15:56:23 -04:00
parent 9e866774aa
commit a09115b23e
1 changed files with 32 additions and 23 deletions
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55
drivers/block/nvme.c
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@ -868,6 +868,33 @@ static int nvme_set_features(struct nvme_dev *dev, unsigned fid,
return nvme_submit_admin_cmd(dev, &c, result);
}
/**
* nvme_cancel_ios - Cancel outstanding I/Os
* @queue: The queue to cancel I/Os on
* @timeout: True to only cancel I/Os which have timed out
*/
static void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout)
{
int depth = nvmeq->q_depth - 1;
struct nvme_cmd_info *info = nvme_cmd_info(nvmeq);
unsigned long now = jiffies;
int cmdid;
for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) {
void *ctx;
nvme_completion_fn fn;
static struct nvme_completion cqe = {
.status = cpu_to_le16(NVME_SC_ABORT_REQ) << 1,
};
if (timeout && !time_after(now, info[cmdid].timeout))
continue;
dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d\n", cmdid);
ctx = cancel_cmdid(nvmeq, cmdid, &fn);
fn(nvmeq->dev, ctx, &cqe);
}
}
static void nvme_free_queue_mem(struct nvme_queue *nvmeq)
{
dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth),
@ -882,6 +909,10 @@ static void nvme_free_queue(struct nvme_dev *dev, int qid)
struct nvme_queue *nvmeq = dev->queues[qid];
int vector = dev->entry[nvmeq->cq_vector].vector;
spin_lock_irq(&nvmeq->q_lock);
nvme_cancel_ios(nvmeq, false);
spin_unlock_irq(&nvmeq->q_lock);
irq_set_affinity_hint(vector, NULL);
free_irq(vector, nvmeq);
@ -1236,26 +1267,6 @@ static const struct block_device_operations nvme_fops = {
.compat_ioctl = nvme_ioctl,
};
static void nvme_timeout_ios(struct nvme_queue *nvmeq)
{
int depth = nvmeq->q_depth - 1;
struct nvme_cmd_info *info = nvme_cmd_info(nvmeq);
unsigned long now = jiffies;
int cmdid;
for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) {
void *ctx;
nvme_completion_fn fn;
static struct nvme_completion cqe = { .status = cpu_to_le16(NVME_SC_ABORT_REQ) << 1, };
if (!time_after(now, info[cmdid].timeout))
continue;
dev_warn(nvmeq->q_dmadev, "Timing out I/O %d\n", cmdid);
ctx = cancel_cmdid(nvmeq, cmdid, &fn);
fn(nvmeq->dev, ctx, &cqe);
}
}
static void nvme_resubmit_bios(struct nvme_queue *nvmeq)
{
while (bio_list_peek(&nvmeq->sq_cong)) {
@ -1287,7 +1298,7 @@ static int nvme_kthread(void *data)
spin_lock_irq(&nvmeq->q_lock);
if (nvme_process_cq(nvmeq))
printk("process_cq did something\n");
nvme_timeout_ios(nvmeq);
nvme_cancel_ios(nvmeq, true);
nvme_resubmit_bios(nvmeq);
spin_unlock_irq(&nvmeq->q_lock);
}
@ -1549,8 +1560,6 @@ static int nvme_dev_remove(struct nvme_dev *dev)
list_del(&dev->node);
spin_unlock(&dev_list_lock);
/* TODO: wait all I/O finished or cancel them */
list_for_each_entry_safe(ns, next, &dev->namespaces, list) {
list_del(&ns->list);
del_gendisk(ns->disk);