struct blkif_common_request {
char dummy;
};
-struct blkif_common_response {
- char dummy;
-};
/* i386 protocol version */
#pragma pack(push, 4)
struct blkif_x86_32_request_discard discard;
} u;
};
-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_discard discard;
} u;
};
-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;
int st_wr_sect;
wait_queue_head_t waiting_to_free;
+ /* Thread shutdown wait queue. */
+ wait_queue_head_t shutdown_wq;
};
struct blkif_x86_32_request *src)
{
int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST;
- dst->operation = src->operation;
+ dst->operation = ACCESS_ONCE(src->operation);
dst->nr_segments = src->nr_segments;
dst->handle = src->handle;
dst->id = src->id;
- switch (src->operation) {
+ switch (dst->operation) {
case BLKIF_OP_READ:
case BLKIF_OP_WRITE:
case BLKIF_OP_WRITE_BARRIER:
struct blkif_x86_64_request *src)
{
int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST;
- dst->operation = src->operation;
+ dst->operation = ACCESS_ONCE(src->operation);
dst->nr_segments = src->nr_segments;
dst->handle = src->handle;
dst->id = src->id;
- switch (src->operation) {
+ switch (dst->operation) {
case BLKIF_OP_READ:
case BLKIF_OP_WRITE:
case BLKIF_OP_WRITE_BARRIER: