diff options
Diffstat (limited to 'hw/block/xen_blkif.h')
| -rw-r--r-- | hw/block/xen_blkif.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/hw/block/xen_blkif.h b/hw/block/xen_blkif.h index 7ccf92ec2a..0738684410 100644 --- a/hw/block/xen_blkif.h +++ b/hw/block/xen_blkif.h @@ -28,6 +28,14 @@ struct blkif_x86_32_request { blkif_sector_t sector_number; /* start sector idx on disk (r/w only) */ struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST]; }; +struct blkif_x86_32_request_discard { + uint8_t operation; /* BLKIF_OP_DISCARD */ + uint8_t flag; /* nr_segments in request struct */ + blkif_vdev_t handle; /* only for read/write requests */ + uint64_t id; /* private guest value, echoed in resp */ + blkif_sector_t sector_number; /* start sector idx on disk (r/w only) */ + uint64_t nr_sectors; /* # of contiguous sectors to discard */ +}; struct blkif_x86_32_response { uint64_t id; /* copied from request */ uint8_t operation; /* copied from request */ @@ -46,6 +54,14 @@ struct blkif_x86_64_request { blkif_sector_t sector_number; /* start sector idx on disk (r/w only) */ struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST]; }; +struct blkif_x86_64_request_discard { + uint8_t operation; /* BLKIF_OP_DISCARD */ + uint8_t flag; /* nr_segments in request struct */ + blkif_vdev_t handle; /* only for read/write requests */ + uint64_t __attribute__((__aligned__(8))) id; + blkif_sector_t sector_number; /* start sector idx on disk (r/w only) */ + uint64_t nr_sectors; /* # of contiguous sectors to discard */ +}; struct blkif_x86_64_response { uint64_t __attribute__((__aligned__(8))) id; uint8_t operation; /* copied from request */ @@ -88,7 +104,7 @@ static inline void blkif_get_x86_32_req(blkif_request_t *dst, /* Prevent the compiler from using src->... instead. */ barrier(); if (dst->operation == BLKIF_OP_DISCARD) { - struct blkif_request_discard *s = (void *)src; + struct blkif_x86_32_request_discard *s = (void *)src; struct blkif_request_discard *d = (void *)dst; d->nr_sectors = s->nr_sectors; return; @@ -114,7 +130,7 @@ static inline void blkif_get_x86_64_req(blkif_request_t *dst, /* Prevent the compiler from using src->... instead. */ barrier(); if (dst->operation == BLKIF_OP_DISCARD) { - struct blkif_request_discard *s = (void *)src; + struct blkif_x86_64_request_discard *s = (void *)src; struct blkif_request_discard *d = (void *)dst; d->nr_sectors = s->nr_sectors; return; |