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-rw-r--r--drivers/block/loop.c3
-rw-r--r--drivers/block/nbd.c15
-rw-r--r--drivers/block/rbd.c2
-rw-r--r--drivers/block/xen-blkback/blkback.c26
-rw-r--r--drivers/block/xen-blkback/common.h26
-rw-r--r--drivers/block/xen-blkback/xenbus.c15
6 files changed, 36 insertions, 51 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 28d932906f24..ebbd0c3fe0ed 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -608,6 +608,9 @@ static int loop_switch(struct loop_device *lo, struct file *file)
*/
static int loop_flush(struct loop_device *lo)
{
+ /* loop not yet configured, no running thread, nothing to flush */
+ if (lo->lo_state != Lo_bound)
+ return 0;
return loop_switch(lo, NULL);
}
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 9a7bb2c29447..f3f191ba8ca4 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -937,14 +937,6 @@ static int nbd_reconnect_socket(struct nbd_device *nbd, unsigned long arg)
return -ENOSPC;
}
-/* Reset all properties of an NBD device */
-static void nbd_reset(struct nbd_device *nbd)
-{
- nbd->config = NULL;
- nbd->tag_set.timeout = 0;
- queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, nbd->disk->queue);
-}
-
static void nbd_bdev_reset(struct block_device *bdev)
{
if (bdev->bd_openers > 1)
@@ -1029,7 +1021,11 @@ static void nbd_config_put(struct nbd_device *nbd)
}
kfree(config->socks);
}
- nbd_reset(nbd);
+ kfree(nbd->config);
+ nbd->config = NULL;
+
+ nbd->tag_set.timeout = 0;
+ queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, nbd->disk->queue);
mutex_unlock(&nbd->config_lock);
nbd_put(nbd);
@@ -1483,7 +1479,6 @@ static int nbd_dev_add(int index)
disk->fops = &nbd_fops;
disk->private_data = nbd;
sprintf(disk->disk_name, "nbd%d", index);
- nbd_reset(nbd);
add_disk(disk);
nbd_total_devices++;
return index;
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 454bf9c34882..c16f74547804 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -4023,6 +4023,7 @@ static void rbd_queue_workfn(struct work_struct *work)
switch (req_op(rq)) {
case REQ_OP_DISCARD:
+ case REQ_OP_WRITE_ZEROES:
op_type = OBJ_OP_DISCARD;
break;
case REQ_OP_WRITE:
@@ -4420,6 +4421,7 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
q->limits.discard_granularity = segment_size;
q->limits.discard_alignment = segment_size;
blk_queue_max_discard_sectors(q, segment_size / SECTOR_SIZE);
+ blk_queue_max_write_zeroes_sectors(q, segment_size / SECTOR_SIZE);
if (!ceph_test_opt(rbd_dev->rbd_client->client, NOCRC))
q->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES;
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index 726c32e35db9..0e824091a12f 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -609,8 +609,6 @@ int xen_blkif_schedule(void *arg)
unsigned long timeout;
int ret;
- xen_blkif_get(blkif);
-
set_freezable();
while (!kthread_should_stop()) {
if (try_to_freeze())
@@ -665,7 +663,6 @@ purge_gnt_list:
print_stats(ring);
ring->xenblkd = NULL;
- xen_blkif_put(blkif);
return 0;
}
@@ -1436,34 +1433,35 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
static void make_response(struct xen_blkif_ring *ring, u64 id,
unsigned short op, int st)
{
- struct blkif_response resp;
+ struct blkif_response *resp;
unsigned long flags;
union blkif_back_rings *blk_rings;
int notify;
- resp.id = id;
- resp.operation = op;
- resp.status = st;
-
spin_lock_irqsave(&ring->blk_ring_lock, flags);
blk_rings = &ring->blk_rings;
/* Place on the response ring for the relevant domain. */
switch (ring->blkif->blk_protocol) {
case BLKIF_PROTOCOL_NATIVE:
- memcpy(RING_GET_RESPONSE(&blk_rings->native, blk_rings->native.rsp_prod_pvt),
- &resp, sizeof(resp));
+ resp = RING_GET_RESPONSE(&blk_rings->native,
+ blk_rings->native.rsp_prod_pvt);
break;
case BLKIF_PROTOCOL_X86_32:
- memcpy(RING_GET_RESPONSE(&blk_rings->x86_32, blk_rings->x86_32.rsp_prod_pvt),
- &resp, sizeof(resp));
+ resp = RING_GET_RESPONSE(&blk_rings->x86_32,
+ blk_rings->x86_32.rsp_prod_pvt);
break;
case BLKIF_PROTOCOL_X86_64:
- memcpy(RING_GET_RESPONSE(&blk_rings->x86_64, blk_rings->x86_64.rsp_prod_pvt),
- &resp, sizeof(resp));
+ resp = RING_GET_RESPONSE(&blk_rings->x86_64,
+ blk_rings->x86_64.rsp_prod_pvt);
break;
default:
BUG();
}
+
+ resp->id = id;
+ resp->operation = op;
+ resp->status = st;
+
blk_rings->common.rsp_prod_pvt++;
RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&blk_rings->common, notify);
spin_unlock_irqrestore(&ring->blk_ring_lock, flags);
diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h
index dea61f6ab8cb..ecb35fe8ca8d 100644
--- a/drivers/block/xen-blkback/common.h
+++ b/drivers/block/xen-blkback/common.h
@@ -75,9 +75,8 @@ extern unsigned int xenblk_max_queues;
struct blkif_common_request {
char dummy;
};
-struct blkif_common_response {
- char dummy;
-};
+
+/* i386 protocol version */
struct blkif_x86_32_request_rw {
uint8_t nr_segments; /* number of segments */
@@ -129,14 +128,6 @@ struct blkif_x86_32_request {
} u;
} __attribute__((__packed__));
-/* i386 protocol version */
-#pragma pack(push, 4)
-struct blkif_x86_32_response {
- uint64_t id; /* copied from request */
- uint8_t operation; /* copied from request */
- int16_t status; /* BLKIF_RSP_??? */
-};
-#pragma pack(pop)
/* x86_64 protocol version */
struct blkif_x86_64_request_rw {
@@ -193,18 +184,12 @@ struct blkif_x86_64_request {
} u;
} __attribute__((__packed__));
-struct blkif_x86_64_response {
- uint64_t __attribute__((__aligned__(8))) id;
- uint8_t operation; /* copied from request */
- int16_t status; /* BLKIF_RSP_??? */
-};
-
DEFINE_RING_TYPES(blkif_common, struct blkif_common_request,
- struct blkif_common_response);
+ struct blkif_response);
DEFINE_RING_TYPES(blkif_x86_32, struct blkif_x86_32_request,
- struct blkif_x86_32_response);
+ struct blkif_response __packed);
DEFINE_RING_TYPES(blkif_x86_64, struct blkif_x86_64_request,
- struct blkif_x86_64_response);
+ struct blkif_response);
union blkif_back_rings {
struct blkif_back_ring native;
@@ -281,6 +266,7 @@ struct xen_blkif_ring {
wait_queue_head_t wq;
atomic_t inflight;
+ bool active;
/* One thread per blkif ring. */
struct task_struct *xenblkd;
unsigned int waiting_reqs;
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 1f3dfaa54d87..792da683e70d 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -159,7 +159,7 @@ static int xen_blkif_alloc_rings(struct xen_blkif *blkif)
init_waitqueue_head(&ring->shutdown_wq);
ring->blkif = blkif;
ring->st_print = jiffies;
- xen_blkif_get(blkif);
+ ring->active = true;
}
return 0;
@@ -249,10 +249,12 @@ static int xen_blkif_disconnect(struct xen_blkif *blkif)
struct xen_blkif_ring *ring = &blkif->rings[r];
unsigned int i = 0;
+ if (!ring->active)
+ continue;
+
if (ring->xenblkd) {
kthread_stop(ring->xenblkd);
wake_up(&ring->shutdown_wq);
- ring->xenblkd = NULL;
}
/* The above kthread_stop() guarantees that at this point we
@@ -296,7 +298,7 @@ static int xen_blkif_disconnect(struct xen_blkif *blkif)
BUG_ON(ring->free_pages_num != 0);
BUG_ON(ring->persistent_gnt_c != 0);
WARN_ON(i != (XEN_BLKIF_REQS_PER_PAGE * blkif->nr_ring_pages));
- xen_blkif_put(blkif);
+ ring->active = false;
}
blkif->nr_ring_pages = 0;
/*
@@ -312,9 +314,10 @@ static int xen_blkif_disconnect(struct xen_blkif *blkif)
static void xen_blkif_free(struct xen_blkif *blkif)
{
-
- xen_blkif_disconnect(blkif);
+ WARN_ON(xen_blkif_disconnect(blkif));
xen_vbd_free(&blkif->vbd);
+ kfree(blkif->be->mode);
+ kfree(blkif->be);
/* Make sure everything is drained before shutting down */
kmem_cache_free(xen_blkif_cachep, blkif);
@@ -511,8 +514,6 @@ static int xen_blkbk_remove(struct xenbus_device *dev)
xen_blkif_put(be->blkif);
}
- kfree(be->mode);
- kfree(be);
return 0;
}
generated by cgit (git 2.34.1) at 2024-06-18 05:33:32 +0000